JP6344015B2 - Hot water system - Google Patents

Description

  The present invention relates to a hot water supply system.

  Conventional heat pump hot water supply systems use inexpensive late-night power to boil hot water at night, convert electrical energy into heat energy, and store energy as hot water in a hot water storage tank. However, since the hot water is boiled at night on the previous day, it is necessary to store more heat energy than necessary in the hot water storage tank, considering that the temperature drops before use on the day. Moreover, the cold exhaust heat exhausted by the heat pump when boiling hot water is discharged as it is.

  Thus, recently, a heat pump hot water supply system that includes a storage battery and that can store not only the electric energy as heat energy but also the electric energy as it is in the storage battery is used. In such a heat pump hot water supply system, electrical energy can be taken out from the storage battery when necessary, so there is no need to store unnecessary energy as heat energy, which not only reduces the amount of power used but also facilitates the reuse of stored energy. And energy efficiency can be improved at the same time. For example, Patent Document 1 (Japanese Patent Laid-Open No. 2010-145072) describes an energy storage type heat pump water heater provided with a secondary battery as a power storage means.

  By the way, the current storage battery has a narrow operating temperature range, and the battery capacity deteriorates as the temperature rises. Therefore, maintaining a constant temperature is an important condition for extending the life of the storage battery. Therefore, for example, Patent Document 1 proposes to adjust the temperature of the secondary battery by storing the secondary battery in the same space as the hot water storage tank.

  However, in the hot water supply system described in Patent Document 1, the secondary battery as the temperature adjustment target is cooled using the cold heat of the water in the lower part of the hot water storage tank. For this reason, in a situation where the temperature of the water in the lower part of the hot water storage tank is a temperature at which the secondary battery cannot be cooled, the secondary battery as the temperature adjustment target cannot be cooled.

  Here, in the hot water supply system, a refrigeration cycle is performed in the refrigerant circuit in order to store hot water in the hot water storage tank. Here, when the refrigeration cycle is performed in the refrigerant circuit, since the refrigerant passing through the evaporator absorbs heat from the surroundings and evaporates, the surroundings of the evaporator can be cooled.

  Thus, in the hot water supply system, it is conceivable that cold energy for adjusting the temperature of the storage battery is obtained from the evaporator when the refrigeration cycle is performed in the refrigerant circuit.

  However, when the refrigeration cycle is not performed in a situation where hot water in the hot water storage tank is unnecessary or sufficiently stored, the refrigerant does not evaporate in the evaporator, so that cold heat cannot be obtained.

  This invention is made | formed in view of the above-mentioned point, The subject of this invention is the hot water supply system which can adjust the temperature of a storage battery even in the condition where the refrigerating cycle is not performed in the hot water supply system. It is to provide.

The hot water supply system according to the first aspect includes a heat pump, a hot water storage tank, a storage battery, and a cold heat storage temperature adjusting means. The heat pump includes a compressor, a radiator, an expansion mechanism, and an evaporator, and has a refrigerant circuit in which the refrigerant circulates. In the hot water storage tank, unheated water is supplied downward, and hot water obtained by heating the lower water using the heat of the refrigerant flowing through the radiator is stored upward. The cold heat storage temperature adjustment means has a temperature adjustment interposition part , stores the cold heat using the cold heat of the refrigerant flowing through the evaporator, and transmits the stored cold heat to the storage battery via the temperature adjustment intermediate part. Adjust. The cold heat storage temperature adjusting means has a low temperature side circuit for circulating the heat medium cooled by the stored cold heat by sending it to the temperature adjusting interposition part.

  In this hot water supply system, the refrigerant evaporates in the evaporator by performing the refrigeration cycle in the refrigerant circuit. Thus, in the situation where the refrigerant is evaporated in the evaporator, the evaporated refrigerant absorbs heat from the periphery of the evaporator, and the periphery is cooled.

  Here, the cold energy obtained in this way can be used for temperature control of the storage battery. However, in the conventional technology, in the situation where the refrigeration cycle is not performed, the temperature control of the storage battery using cold heat can be performed. Not.

  On the other hand, in this hot water supply system, even in a situation where the refrigeration cycle is not performed, that is, in a situation where the refrigerant is not evaporated in the evaporator of the refrigerant circuit, the cold heat storage temperature adjusting means When the refrigerant is evaporated in the evaporator, the cold heat is stored using the cold heat of the refrigerant flowing through the evaporator. And this cold energy storage temperature adjustment means adjusts the temperature of a storage battery using the cold energy stored in this way. Therefore, even in a situation where the refrigeration cycle is not performed, the temperature of the storage battery can be adjusted.

  In addition, when the temperature of a storage battery falls for some reason and falls below the temperature of the stored cold heat, the temperature of a storage battery can also be adjusted by warming a storage battery using the stored cold heat.

  In this hot water supply system, it is possible to adjust the temperature of the storage battery only by circulating the heat medium cooled by the stored cold heat in the low temperature side circuit.

The hot water supply system according to the second aspect is the hot water supply system according to the first aspect , and further includes a cold heat storage tank. At least a part of the evaporator is arranged so as to be able to exchange heat with the heat medium in the cold heat storage tank. The low temperature side circuit has a cold heat storage tank connection circuit configured such that the heat medium can be circulated between the temperature adjusting interposition part and the cold heat storage tank.

  In this hot water supply system, when cold heat is held in the heat medium, the temperature of the storage battery can be adjusted. Further, in this hot water supply system, the heat medium circulates in the cold heat storage tank connection circuit, so that convection of the heat medium can be generated in the cold heat storage tank. Thereby, it is possible to improve the heat exchange efficiency between the refrigerant flowing in the evaporator and the heat medium in the cold heat storage tank.

The hot water supply system according to the third aspect is the hot water supply system according to the second aspect , and further includes a controller that performs switching. The cold storage tank connection circuit further includes a bypass heat medium circuit that bypasses the upstream side and the downstream side of the temperature adjustment interposition part, a bypass heat medium opening / closing mechanism provided in the middle of the bypass heat medium circuit, and a pump. . The control unit that performs switching circulates the heat medium between the temperature control intervening part and the cold heat storage tank, and circulates the heat medium between the cold heat storage tank and the bypass heat medium circuit without sending it to the temperature control interposing part. Switch the state.

  In the cold storage tank connection circuit, the position where the pump is provided is that the heat medium is circulated between the temperature adjustment interposition section and the cold storage tank according to the switching control by the control section, and the temperature adjustment interposition section. If it is a position which can circulate a heat carrier between a cold storage tank and a bypass heat carrier circuit, without sending to, it will not specifically limit.

  In this hot water supply system, the control unit performs switching so that the heat medium can be circulated between the cold heat storage tank and the bypass heat medium circuit even when the temperature of the storage battery is not adjusted by the cold heat. Thereby, since the convection of a heat medium can be produced in a cold heat storage tank, it becomes possible to improve the cooling efficiency of the heat medium by the evaporator in a cold heat storage tank.

Hot water supply system according to the fourth aspect, a hot water supply system according to the first aspect, cold heat storage tank, and further includes an intermediate heating medium connecting circuit. The intermediate heat medium connection circuit has an evaporating heat exchanging part capable of exchanging heat with the refrigerant flowing through the evaporator, and is configured so that the heat medium can be circulated between the cold storage tank and the evaporating heat exchanging part. Has been. The low temperature side circuit has a cold heat storage tank connection circuit configured such that the heat medium can be circulated between the temperature adjusting interposition part and the cold heat storage tank.

  In this hot water supply system, when cold heat is held in the heat medium, the temperature of the storage battery can be adjusted. Further, in this hot water supply system, it is possible to circulate the same type of heat medium in all of the intermediate heat medium connection circuit, the cold heat storage tank, and the cold heat storage tank connection circuit, and it is necessary to perform heat exchange between different types of media. Disappears. Furthermore, in this hot water supply system, it is not necessary to bring the heat medium into contact with the evaporator of the refrigerant circuit in the cold heat storage tank, that is, it is not necessary to arrange the evaporator in the cold heat storage tank. The freedom degree of arrangement | positioning of a cold storage tank can be raised. As described above, it is possible to eliminate the need for heat exchange between different types of media while increasing the degree of freedom in arranging the evaporator and the cold heat storage tank.

A hot water supply system according to a fifth aspect is the hot water supply system according to the first aspect , and further includes a cold heat storage tank in which an intermediate medium is stored. At least a part of the evaporator is arranged to be able to exchange heat with the intermediate medium in the cold heat storage tank. The low-temperature circuit has a cold-storage heat exchange section that can exchange heat with the intermediate medium in the cold-storage tank so that the heat medium can be circulated between the temperature adjustment interposition section and the cold-storage heat exchange section. It has a constructed cold storage tank independent circuit.

  In this hot water supply system, when cold heat is held in the intermediate medium or the heat medium, the temperature of the storage battery can be adjusted. Further, the intermediate medium in the cold heat storage tank does not need to flow for heat transfer. For this reason, it is possible to employ a material having a high heat storage capacity and low fluidity as an intermediate medium in the cold heat storage tank.

A hot water supply system according to a sixth aspect is the hot water supply system according to the first aspect , and further includes a cold heat storage tank and an intermediate medium independent circuit. The intermediate medium independent circuit has an evaporating heat exchanging part capable of exchanging heat with the refrigerant flowing through the evaporator, and is configured so that the intermediate medium can be circulated between the cold storage tank and the evaporating heat exchanging part. ing. The low-temperature circuit has a cold-storage heat exchange section that can exchange heat with the intermediate medium in the cold-storage tank so that the heat medium can be circulated between the temperature adjustment interposition section and the cold-storage heat exchange section. It has a heat storage tank independent circuit configured.

  In this hot water supply system, when cold heat is held in the intermediate medium or the heat medium, the temperature of the storage battery can be adjusted. Further, in this hot water supply system, the intermediate medium circulates in the intermediate medium independent circuit, so that convection of the intermediate medium can be generated in the cold heat storage tank. As a result, the cold storage heat exchange unit provided so as to be able to exchange heat with the intermediate medium in the cold storage tank can improve the heat exchange efficiency between the intermediate medium and the heat medium flowing inside. It has become. Furthermore, in this hot water supply system, the intermediate medium does not need to be brought into contact with the evaporator of the refrigerant circuit in the cold storage tank, that is, the evaporator does not need to be arranged in the cold storage tank. The freedom degree of arrangement | positioning of a cold storage tank can be raised. As described above, it is possible to improve the heat exchange efficiency between the heat medium and the intermediate medium flowing through the inside of the cold heat storage heat exchanging section while increasing the degree of freedom of the arrangement of the evaporator and the cold heat storage tank.

A hot water supply system according to a seventh aspect is the hot water supply system according to any of the first to sixth aspects, wherein the heat medium is an antifreeze.

  In this hot water supply system, it is possible to widen the temperature control range of the storage battery by employing an antifreeze liquid that has high fluidity and a large amount of heat retention.

The hot water supply system according to an eighth aspect is the hot water supply system according to the fifth aspect , and the intermediate medium is slurry ice.

  The slurry ice is not particularly limited, but may be, for example, fluid ice in which fine ice particles and a liquid such as salt water are mixed.

  In this hot water supply system, by adopting slurry ice as an intermediate medium that is stored in the cold heat storage tank and does not need to be circulated between the temperature adjusting interposition part and the evaporator, the heat exchange efficiency in the cold heat storage tank is improved. Can be increased.

  The hot water supply system according to the ninth aspect includes a heat pump, a hot water storage tank, a storage battery, cold heat storage temperature adjusting means, and a fan. The heat pump includes a compressor, a radiator, an expansion mechanism, and an evaporator, and has a refrigerant circuit in which the refrigerant circulates. In the hot water storage tank, unheated water is supplied downward, and hot water obtained by heating the lower water using the heat of the refrigerant flowing through the radiator is stored upward. The cold energy storage temperature adjusting means stores the cold energy using the cold energy of the refrigerant flowing through the evaporator, and adjusts the temperature of the storage battery using the accumulated cold energy. The refrigerant circuit further includes a heat exchanger that exchanges heat between the refrigerant flowing inside and the air supplied from the fan between the evaporator and the expansion mechanism.

  In this hot water supply system, the refrigerant evaporates in the evaporator by performing the refrigeration cycle in the refrigerant circuit. Thus, in the situation where the refrigerant is evaporated in the evaporator, the evaporated refrigerant absorbs heat from the periphery of the evaporator, and the periphery is cooled.

  Here, the cold energy obtained in this way can be used for temperature control of the storage battery. However, in the conventional technology, in the situation where the refrigeration cycle is not performed, the temperature control of the storage battery using cold heat can be performed. Not.

  On the other hand, in this hot water supply system, even in a situation where the refrigeration cycle is not performed, that is, in a situation where the refrigerant is not evaporated in the evaporator of the refrigerant circuit, the cold heat storage temperature adjusting means When the refrigerant is evaporated in the evaporator, the cold heat is stored using the cold heat of the refrigerant flowing through the evaporator. And this cold energy storage temperature adjustment means adjusts the temperature of a storage battery using the cold energy stored in this way. Therefore, even in a situation where the refrigeration cycle is not performed, the temperature of the storage battery can be adjusted.

  In addition, when the temperature of a storage battery falls for some reason and falls below the temperature of the stored cold heat, the temperature of a storage battery can also be adjusted by warming a storage battery using the stored cold heat.

Moreover, in this hot water supply system, the amount of heat exchanged between the refrigerant and the air in the heat exchanger can be adjusted by adjusting the amount of air supplied to the heat exchanger by the fan. Thereby, in the refrigerant circuit, it becomes possible to improve the balance between the ability of the evaporator for storing cold heat and the ability of the radiator for storing hot water in the hot water storage tank by adjusting the amount of heat exchange in the heat exchanger. .

  For example, when a refrigeration cycle is performed to store hot water in a hot water storage tank, in a state where the cold heat in the cold heat storage tank is sufficiently accumulated, the evaporation of the refrigerant may not be promoted in the evaporator. In some cases, the heat exchange amount of the heat exchanger can be increased to improve the balance.

A hot water supply system according to a tenth aspect is the hot water supply system according to the ninth aspect , wherein the refrigerant circuit includes an outdoor heat exchanger and an intermediate expansion mechanism that expands the refrigerant passing between the evaporator and the outdoor heat exchanger. In addition.

  In this hot water supply system, the heat exchanger can function as a refrigerant radiator or evaporator by adjusting the degree of pressure reduction in the expansion mechanism and the intermediate expansion mechanism. Thereby, in a refrigerant circuit, the balance of the capability of the evaporator for storing cold heat and the capability of the radiator for storing hot water in a hot water storage tank can be improved more easily.

The hot water supply system according to the eleventh aspect is the hot water supply system according to the tenth aspect , further comprising a control unit that performs switching. The refrigerant circuit further includes a bypass refrigerant circuit that connects a portion between the compressor and the evaporator, a portion between the intermediate expansion mechanism and the outdoor heat exchanger, and a bypass refrigerant opening / closing mechanism provided in the middle of the bypass refrigerant circuit. doing. The control unit that performs switching switches between a state in which the refrigerant passes through the evaporator and a state in which the refrigerant does not pass through the evaporator.

  In this hot water supply system, when the refrigeration cycle is performed in order to store hot water in the hot water storage tank, the switching control unit switches to a state in which the refrigerant does not pass through the evaporator so that cold heat is not stored excessively. It becomes possible to.

  For example, depending on the type of heat medium in the cold heat storage tank, there is a problem that volume change occurs due to excessive cooling, causing damage to equipment, but the problem is avoided by suppressing excessive cooling. It becomes possible.

A hot water supply system according to a twelfth aspect includes a heat pump, a hot water storage tank, a storage battery, a cold heat storage temperature adjustment means, and a high temperature side circulation means. The heat pump includes a compressor, a radiator, an expansion mechanism, and an evaporator, and has a refrigerant circuit in which the refrigerant circulates. In the hot water storage tank, unheated water is supplied downward, and hot water obtained by heating the lower water using the heat of the refrigerant flowing through the radiator is stored upward. The cold energy storage temperature adjusting means stores the cold energy using the cold energy of the refrigerant flowing through the evaporator, and adjusts the temperature of the storage battery using the accumulated cold energy. The cold energy storage temperature adjustment means has a temperature adjustment interposition part. The stored cold energy is transmitted to the storage battery via the temperature adjustment interposition part. At least a part of the shape of the temperature control interposition part is a shape along the outer shape of the storage battery . The high temperature side circulation means circulates the hot water stored above the hot water storage tank so as to return to the hot water storage tank after being sent to the temperature adjusting intervening portion.

  In this hot water supply system, the refrigerant evaporates in the evaporator by performing the refrigeration cycle in the refrigerant circuit. Thus, in the situation where the refrigerant is evaporated in the evaporator, the evaporated refrigerant absorbs heat from the periphery of the evaporator, and the periphery is cooled.

  Here, the cold energy obtained in this way can be used for temperature control of the storage battery. However, in the conventional technology, in the situation where the refrigeration cycle is not performed, the temperature control of the storage battery using cold heat can be performed. Not.

  On the other hand, in this hot water supply system, even in a situation where the refrigeration cycle is not performed, that is, in a situation where the refrigerant is not evaporated in the evaporator of the refrigerant circuit, the cold heat storage temperature adjusting means When the refrigerant is evaporated in the evaporator, the cold heat is stored using the cold heat of the refrigerant flowing through the evaporator. And this cold energy storage temperature adjustment means adjusts the temperature of a storage battery using the cold energy stored in this way. Therefore, even in a situation where the refrigeration cycle is not performed, the temperature of the storage battery can be adjusted.

  In addition, when the temperature of a storage battery falls for some reason and falls below the temperature of the stored cold heat, the temperature of a storage battery can also be adjusted by warming a storage battery using the stored cold heat.

Further, in this hot water supply system, the stored cold energy can be transmitted to the storage battery via the temperature adjustment interposition part. In addition, since at least a part of the shape of the temperature control intervening portion has a shape along the outer shape of the storage battery, it is easy to ensure a contact area (or thermal contact area) with the storage battery.

Further, in this hot water supply system, it is possible to alleviate excessive cooling of the storage battery by further including a high temperature side circulation means.

A hot water supply system according to a thirteenth aspect is the hot water supply system according to the twelfth aspect , further comprising a phase change medium. The phase change medium is interposed between the cold energy storage temperature adjusting means and the storage battery so as to be in thermal contact with each other, and changes phase at a predetermined temperature in order to prevent an abnormal temperature increase of the storage battery.

  The phase change at a predetermined temperature of the phase change medium is not particularly limited, and may be, for example, a phase change from a solid to a liquid.

  In this hot water supply system, since the phase change medium that changes phase at a predetermined temperature is provided between the cold heat storage temperature adjustment means and the storage battery, the storage battery is likely to be heated excessively by the cold heat storage temperature adjustment means. Even so, the phase change medium consumes the excessive heat energy as energy required for the latent heat change, and can suppress the temperature rise. Thereby, it can suppress that the temperature of a storage battery rises excessively.

A hot water supply system according to a fourteenth aspect is the hot water supply system according to the thirteenth aspect , wherein the phase change medium is a latent heat storage material containing paraffin.

  In addition, the temperature at which the phase change occurs in the latent heat storage material containing paraffin is not particularly limited, but may be, for example, a temperature around 60 ° C.

  In this hot water supply system, it is possible to suppress an excessive increase in the temperature of the storage battery by changing the phase of the latent heat storage material containing paraffin.

A hot water supply system according to a fifteenth aspect is the hot water supply system according to any of the twelfth aspect to the fourteenth aspect , in order to adjust the temperature of the storage battery, the temperature adjustment degree by the high temperature side circulation means and the cold heat storage temperature adjustment means It further has a control part which controls the temperature control degree by.

  In this hot water supply system, the controller that controls the temperature control controls both the temperature control by the high-temperature side circulation means and the temperature control by the cold heat storage temperature control means, so that the temperature of the storage battery is adjusted in more detail. Is possible.

A hot water supply system according to a sixteenth aspect is the hot water supply system according to any of the first to fifteenth aspects , further comprising a hot water storage circuit, a hot water storage circuit flow rate adjusting means, and a stop-time heat storage use control unit. The hot water storage circuit uses the heat of the refrigerant flowing in the radiator to heat the water below the hot water storage tank and store hot water above the hot water storage tank. The hot water storage circuit flow rate adjusting means adjusts the flow rate in the hot water storage circuit. The stop-time heat storage use control unit has a control mode in which the temperature of the storage battery is adjusted by the cold heat storage temperature adjustment means using the stored cold energy in a state where the hot water storage circuit flow rate adjustment means is stopped.

  The control mode need not always be executed when the hot water storage circuit flow rate adjustment means is stopped, and is executed only when a predetermined condition is satisfied while the hot water storage circuit flow rate adjustment means is stopped. It may be done. Moreover, this hot water supply system may perform the operation | movement which adjusts the temperature of a storage battery by the cold heat storage temperature control means using the stored cold heat in the state where the hot water storage circuit flow rate adjustment means has not stopped.

  In this hot water supply system, the refrigerant is not evaporated in the evaporator of the refrigerant circuit (the refrigeration cycle is not performed). The adjusting means can adjust the temperature of the storage battery using the stored cold energy.

The hot water supply system according to the seventeenth aspect is the hot water supply system according to the sixteenth aspect , further comprising temperature detection means. The temperature detecting means can detect the internal temperature of the storage battery or can detect the outdoor temperature. When the temperature of the hot water storage circuit flow rate adjusting means is stopped and the temperature detected by the temperature detecting means becomes a predetermined temperature or higher, the stop-time heat storage use control unit uses the stored cold heat to store the storage battery by the cold heat storage temperature adjustment means. Adjust the temperature.

  In this hot water supply system, the stop-time heat storage use control unit is in a state where the hot water storage circuit flow rate adjustment means is stopped, and only when cooling is necessary because the temperature detected by the temperature detection means is equal to or higher than a predetermined temperature. The temperature of the storage battery is adjusted using the stored cold energy. For this reason, it becomes possible to use the stored cold energy only in a necessary situation.

A hot water supply system according to an eighteenth aspect is the hot water supply system according to any of the first to seventeenth aspects, and the storage battery stores at least electric power used by the heat pump.

  In this hot water supply system, the temperature of the storage battery that stores the electric power used by the heat pump can be adjusted using a cooling source obtained by using the heat pump. For this reason, it is not necessary to separately provide a device or system for adjusting the temperature of the storage battery other than the heat pump in which the storage battery is used.

A hot water supply system according to a nineteenth aspect is a hot water supply system according to any of the ninth aspect to the fifteenth aspect , wherein the cold heat storage temperature adjustment means encloses a temperature adjusting medium cooled by the stored cold heat, It has a heat pipe that moves the heat of the temperature adjusting medium toward the storage battery.

  In this hot water supply system, the cold energy storage temperature adjusting means has a heat pipe as means for transmitting cold energy to the storage battery. Thereby, when transmitting cold energy to a storage battery, the pump for flowing the circulating fluid can be made unnecessary.

A hot water supply system according to a twentieth aspect is a hot water supply system according to any one of the first aspect to the nineteenth aspect , and is installed so as to cover the hot water storage tank and the storage battery, and receives a sunlight to generate power Is further provided. The storage battery is charged with electric energy obtained by the photovoltaic power generation panel generating power.

  In this hot water supply system, since the periphery of the storage battery is covered with the solar power generation panel, it is possible to prevent the storage battery from being heated by being exposed to sunlight. Furthermore, the electric power generated by the solar power generation panel can be stored in the storage battery.

A hot water supply system according to a twenty- first aspect is a hot water supply system according to any of the first to nineteenth aspects, is installed so as to cover a hot water storage tank and a storage battery, and receives a sunlight to generate power Is further provided. For driving the heat pump, electric energy obtained by the power generation by the photovoltaic power generation panel is used.

  In this hot water supply system, since the periphery of the storage battery is covered with the solar power generation panel, it is possible to prevent the storage battery from being heated by being exposed to sunlight. Furthermore, the electric power generated by the solar power generation panel can be used for driving the heat pump.

In the hot water supply system according to the first aspect, the temperature of the storage battery can be adjusted even when the refrigeration cycle is not performed. Moreover, in the low temperature side circuit, it is possible to adjust the temperature of the storage battery simply by circulating the heat medium cooled by the stored cold heat.

In the hot water supply system according to the second aspect, it is possible to improve the heat exchange efficiency between the refrigerant flowing in the evaporator and the heat medium in the cold storage tank.

In the hot water supply system according to the third aspect, the cooling efficiency of the heat medium by the evaporator in the cold heat storage tank can be increased.

In the hot water supply system according to the fourth aspect, it is possible to eliminate the need for heat exchange between different types of media while increasing the degree of freedom in arranging the evaporator and the cold heat storage tank.

In the hot water supply system according to the fifth aspect, it is possible to employ a material having a high heat storage capacity and low fluidity as an intermediate medium in the cold heat storage tank.

In the hot water supply system according to the sixth aspect, it is possible to improve the heat exchange efficiency between the heat medium and the intermediate medium flowing inside the cold heat storage heat exchange section while increasing the degree of freedom of the arrangement of the evaporator and the cold heat storage tank. It has become.

In the hot water supply system according to the seventh aspect , the temperature adjustment range of the storage battery can be expanded.

In the hot water supply system according to the eighth aspect , the heat exchange efficiency in the cold heat storage tank can be increased.

In the hot water supply system according to the ninth aspect, the temperature of the storage battery can be adjusted even when the refrigeration cycle is not performed. In addition, the balance between the capacity of the evaporator and the capacity of the radiator can be improved by adjusting the amount of heat exchange in the heat exchanger.

In the hot water supply system according to the tenth aspect , in the refrigerant circuit, the balance between the ability of the evaporator for storing cold heat and the ability of the radiator for storing hot water in the hot water storage tank can be further improved.

In the hot water supply system according to the eleventh aspect , the control unit switches to a state in which the refrigerant does not pass through the evaporator, so that it is possible to prevent cold from being excessively stored.

In the hot water supply system according to the twelfth aspect, the temperature of the storage battery can be adjusted even when the refrigeration cycle is not performed. Moreover, it becomes possible to make it easy to convey the stored cold heat to a storage battery via a temperature control interposition part. Furthermore, excessive cooling of the storage battery can be mitigated.

In the hot water supply system according to the thirteenth aspect , the temperature of the storage battery can be prevented from rising excessively.

In the hot water supply system according to the fourteenth aspect , the temperature of the storage battery can be prevented from excessively rising by changing the phase of the latent heat storage material containing paraffin.

In the hot water supply system according to the fifteenth aspect , the temperature of the storage battery can be adjusted in more detail.

In the hot water supply system according to the sixteenth aspect , even if the hot water storage circuit flow rate adjusting means is stopped, the temperature of the storage battery can be adjusted by the cold heat storage temperature adjusting means using the stored cold energy.

In the hot water supply system according to the seventeenth aspect , the stored cold energy can be used only in a necessary situation.

In the hot water supply system according to the eighteenth aspect, there is no need to separately provide a device or system for adjusting the temperature of the storage battery other than the heat pump in which the storage battery is used.

In the hot water supply system according to the nineteenth aspect, it is possible to eliminate the need for a pump for flowing a circulating fluid when transferring cold energy to the storage battery.

In the hot water supply system according to the twentieth aspect, the temperature rise of the storage battery due to exposure to sunlight can be prevented, and the power generated by the solar power generation panel can be stored in the storage battery.

In the hot water supply system according to the twenty-first aspect, the temperature rise of the storage battery due to exposure to sunlight can be prevented, and the electric power generated by the solar power generation panel can be used for driving the heat pump.

1 is a schematic external view of a hot water supply system according to a first embodiment. It is a schematic block diagram of the hot water supply system which concerns on 1st Embodiment. It is a Mollier diagram of the refrigerant circuit concerning a 1st embodiment. It is a schematic block diagram of the hot water supply system which concerns on 2nd Embodiment. It is a schematic block diagram of the hot water supply system which concerns on 3rd Embodiment. It is a schematic block diagram of the hot water supply system which concerns on 4th Embodiment. It is a schematic block diagram of the hot water supply system which concerns on other embodiment A-1. It is a schematic block diagram of the hot water supply system which concerns on other embodiment A-2. It is a schematic block diagram of the hot water supply system which concerns on other embodiment A-3. It is a schematic block diagram of the hot water supply system which concerns on other embodiment A-4. It is a schematic block diagram of the hot water supply system which concerns on other embodiment B-1. It is a Mollier diagram in the state where the evaporation load of the refrigerant circuit concerning other embodiment B-1 is large. It is a Mollier diagram in the state where the evaporation load of the refrigerant circuit concerning other embodiment B-1 is small. It is a schematic block diagram of the hot water supply system which concerns on other embodiment B-2. It is a schematic block diagram of the hot water supply system which concerns on other embodiment B-3. It is a schematic block diagram of the hot water supply system which concerns on other embodiment B-4. It is a schematic block diagram of the hot water supply system which concerns on other embodiment C-1. It is a schematic block diagram of the hot water supply system which concerns on other embodiment C-2. It is a schematic block diagram of the hot water supply system which concerns on other embodiment C-3. It is a schematic block diagram of the hot water supply system which concerns on other embodiment C-4. It is a schematic block diagram of the hot water supply system which concerns on other Embodiment D. It is a schematic block diagram of the hot water supply system which concerns on other embodiment E-1. It is a schematic block diagram of the hot water supply system which concerns on other embodiment E-2. It is a schematic block diagram of the hot water supply system which concerns on other embodiment F-1. It is a schematic block diagram of the hot water supply system which concerns on other embodiment F-2. It is a schematic block diagram of the hot water storage unit which concerns on other Embodiment G. It is a schematic block diagram of the temperature control jacket vicinity which concerns on other Embodiment H. It is a schematic block diagram of the temperature control jacket vicinity which concerns on other Embodiment I. It is a schematic block diagram of the temperature control jacket vicinity which concerns on other Embodiment J. It is a schematic block diagram of the temperature control jacket vicinity which concerns on other Embodiment K.

  Hereinafter, the hot water supply system of each embodiment will be described.

(1) 1st Embodiment The hot water supply system 100 which concerns on 1st Embodiment is demonstrated using drawing.

  FIG. 1 is a schematic external view of a hot water supply system 100 according to the first embodiment of the present invention. In FIG. 2, the schematic block diagram of the hot water supply system 100 is shown.

(1-1) Overall configuration The hot water supply system 100 is a hot water storage hot water system for storing hot water in advance or heating the hot water in a bathtub before use, and mainly includes a heat pump 2 and a hot water storage unit 3. And a controller 7 for managing and controlling the heat pump 2, the hot water storage unit 3, and the like.

(1-2) Detailed configuration (1-2-1) Heat pump 2
The heat pump 2 functions as a heat source device for creating hot water and uses electric power as a power source. The heat pump 2 includes a casing 2p, and in the casing 2p, there are a refrigerant circuit 20, a water heat exchanger 22, a cold heat storage tank 6, a cold heat storage tank connection circuit 50, various sensors (not shown), and the like in which the refrigerant circulates. I have.

  The refrigerant circuit 20 can perform a refrigeration cycle by circulating a refrigerant therein. The refrigerant circuit 20 mainly includes a compressor 21, a refrigerant pipe 22 r in the water heat exchanger 22, an expansion valve 23, and cold storage refrigerant heat. An exchanger 24 and a refrigerant pipe 25 are provided.

  The refrigerant pipe 25 connects each device in the order of the discharge side of the compressor 21, the refrigerant pipe 22 r in the water heat exchanger 22, the expansion valve 23, the cold storage refrigerant heat exchanger 24, and the suction side of the compressor 21. The refrigerant is circulated inside.

  Here, the compressor 21 sucks gaseous low-pressure refrigerant, performs a compression operation, and discharges the high-pressure refrigerant. The compressor 21 is not particularly limited, and is, for example, an inverter type, and can adjust the refrigerant circulation amount and the high pressure and the low pressure by adjusting the drive frequency by the controller 7.

  The water heat exchanger 22 serves as a radiator that radiates heat of the refrigerant. The water heat exchanger 22 has a refrigerant pipe 22r and a water pipe 32w. The water heat exchanger 22 exchanges heat between the high-temperature refrigerant that flows through the refrigerant pipe 22r after being discharged by the compressor 21 of the heat pump 2 and the water that flows through the water pipe 32w when the circulation operation is performed in the hot water storage unit 3 described later. To do. By the heat exchange in the water heat exchanger 22, the refrigerant passing through the refrigerant pipe 22r is cooled, and at the same time, the water passing through the water pipe 32w is heated to produce hot water (hot water). Here, the hot water is water in which city water supplied to the hot water storage tank 35 to be described later is heated and means water having a temperature at least 1 ° C. higher than the temperature of the city water.

  The expansion valve 23 reduces the pressure of the refrigerant when passing the refrigerant that has radiated heat through the refrigerant pipe 22 r of the water heat exchanger 22. The expansion valve 23 is not particularly limited. For example, the controller 7 can adjust the degree of pressure reduction to adjust the refrigerant circulation amount and the high pressure and the low pressure.

  The cold-storage refrigerant heat exchanger 24 can function as an evaporator that causes heat exchange between the refrigerant flowing inside and the antifreeze liquid as a heat medium filled in the cold-storage tank 6, and evaporates the refrigerant. . The cold storage refrigerant heat exchanger 24 may be disposed so as to be at least partially immersed in the antifreeze liquid in the cold heat storage tank 6, and is preferably disposed so as to be entirely immersed.

  The cold heat storage tank 6 is configured so that an antifreeze liquid is filled in a housing covered with a heat insulating material. Here, the antifreeze liquid is not particularly limited, but, for example, a fluid containing ethylene glycol as a main component of at least 50% and not frozen at 0 ° C. or lower can be used.

  The cold heat storage tank connection circuit 50 is a circuit configured to circulate antifreeze between the cold heat storage tank 6 and a temperature adjustment jacket 48 described later, and includes a low temperature side pump 51. The antifreeze that circulates in the cold storage tank connection circuit 50 has high fluidity, a large amount of heat retention, and can efficiently move cold. The cold heat storage tank connection circuit 50 is arranged so that a part thereof is provided in the heat pump 2 and the other part is provided in the hot water storage unit 3 so as to straddle both. The cold storage tank connection circuit 50 is configured to communicate with the cold storage tank 6, and the low temperature side pump 51 is driven to transfer the antifreeze liquid in the cold storage tank 6 between the temperature control jacket 48. It is possible to circulate.

  Since the antifreeze liquid in the cold heat storage tank 6 is convected by driving the low temperature side pump 51, the antifreeze liquid on the outer surface of the cold storage refrigerant heat exchanger 24 of the refrigerant circuit 20 can be flowed. The heat exchange efficiency between the refrigerant and the antifreeze liquid in the refrigerant heat exchanger 24 can be increased.

(1-2-2) Hot water storage unit 3
The hot water storage unit 3 heats the water supplied from the outside water supply path 81 and the tank water supply path 82 such as city water by heat obtained from the heat pump 2 and stores the water in the hot water storage tank 35 for mixing. It is a device for supplying hot water mixed through a water supply channel 83 to a bathroom or the like.

  The hot water storage unit 3 includes a casing 3p, and the casing 3p mainly includes a hot water storage tank 35, a hot water storage circuit 30, a storage battery 71, a switching element storage portion 72, a high temperature side circuit 40, a temperature adjustment jacket 48, and the like. It has.

(1-2-2-1) Hot water storage tank 35
The hot water storage tank 35 is a tank that stores hot water obtained by heat obtained from the heat pump 2.

  The hot water storage tank 35 is always filled with water and / or hot water, and a hot water temperature detection sensor 36 for allowing the controller 7 to grasp the amount of hot water is provided. This hot water temperature detection sensor 36 includes a first hot water volume detection temperature sensor T1 to a sixth hot water volume detection temperature sensor T6. The first hot water amount detection temperature sensor T1 to the sixth hot water amount detection temperature sensor T6 are arranged at predetermined intervals in order from the lower side of the hot water storage tank 35 to the upper side.

  The temperature distribution of the hot water in the hot water storage tank 35 is such that the warm water having a low temperature sinks downward due to its high specific gravity, and the hot water having a high temperature tends to increase due to its low specific gravity. The distribution is low. As will be described later, unheated water is introduced as city water at the lower end of the hot water storage tank 35, so that the temperature is the lowest in the hot water storage tank 35. The upper end of the hot water storage tank 35 is the highest temperature region in the hot water storage tank 35 because hot water heated in the water heat exchanger 22 functioning as a radiator is introduced as will be described later. In addition, the controller 7 can grasp | ascertain the quantity of the hot water in the hot water storage tank 35 based on the detection temperature of the 1st hot water detection temperature sensor T1-the 6th hot water detection temperature sensor T6.

  A tank water supply path 82 is connected near the lower end of the hot water storage tank 35, and water from the outside such as city water is supplied into the hot water storage tank 35 via the external water supply path 81 and the tank water supply path 82. The

  In the vicinity of the upper end of the hot water storage tank 35, a hot water discharge pipe 85 is connected. Hot water supplied via the hot water outlet 85 and water from the outside such as city water supplied via the mixing water supply channel 83 are mixed by the hot water mixing valve 84. The warm water thus mixed is supplied to the bathroom or the like via the hot water supply pipe 86.

  Although not shown, the hot water storage tank 35 is covered with a heat insulating material formed of foamed polystyrene, foamed polyethylene or the like, except for the lower end, so that the heat in the hot water storage tank 35 is difficult to escape. .

(1-2-2-2) Hot water storage circuit 30
The hot water storage circuit 30 is a circuit for transferring the heat obtained by the heat pump 2 to the water in the hot water storage tank 35 to generate hot water, part of which is in the hot water storage unit 3 and the other part in the heat pump 2. And is arranged so as to straddle both. The hot water storage circuit 30 includes a boiling forward pipe 31, a water pipe 32 w in the water heat exchanger 22, a boiling return pipe 33, and a boiling pump 34.

  The boiling forward pipe 31 connects the vicinity of the lower end portion of the hot water storage tank 35 and the upstream end portion of the water pipe 32 w in the water heat exchanger 22.

  The boiling return pipe 33 connects the downstream end of the water pipe 32 w in the water heat exchanger 22 and the vicinity of the upper end of the hot water storage tank 35.

  The boiling pump 34 is provided in the middle of the boiling forward pipe 31. In the hot water storage circuit 30, when the boiling pump 34 is driven in response to a command from the controller 7, the water in the hot water storage tank 35 or the water having a low temperature existing below is heated to the boiling pipe 31. The temperature is raised by passing through the water pipe 32 w in the water heat exchanger 22, and returned to the vicinity of the upper end of the hot water storage tank 35 via the boiling return pipe 33. In the state where the boiling pump 34 is driven, the controller 7 causes the refrigerant circuit 20 of the heat pump 2 to perform a refrigeration cycle.

  As a result, the boundary between the hot water and the water in the hot water storage tank 35 moves from top to bottom, and the amount of hot water in the hot water storage tank 35 increases.

(1-2-2-3) Storage battery 71
The storage battery 71 is a battery that stores electricity used by the hot water supply system 100. In the present embodiment, the storage battery 71 is installed under the hot water storage tank 35 in thermal contact with the lower end of the hot water storage tank 35. The storage battery 71 is charged at night when the electricity rate is relatively inexpensive, and the charged electricity is used for the operation of the hot water supply system 100 during the day when the electricity rate is relatively expensive. The storage battery 71 is a lithium ion battery in this embodiment. The storage battery 71 has a built-in storage battery temperature sensor 71 a that detects the internal temperature of the storage battery 71. The controller 7 can grasp the detection value of the storage battery temperature sensor 71a.

  Here, the upper surface of the storage battery 71 is in thermal contact with the lower surface of the hot water storage tank 35. The state of being in thermal contact includes both the state of being in direct contact and the case of being in indirect contact with another member interposed therebetween (the same applies hereinafter). In the present embodiment, the lower end of the hot water storage tank 35 and the upper surface of the storage battery 71 are in direct contact.

  Current storage batteries have restrictions on the temperature range in which proper operation is possible, and the battery capacity deteriorates as the temperature rises. For this reason, maintaining a constant temperature is an important condition for extending the life.

  On the other hand, since water from city water is introduced near the lower end of the hot water storage tank 35, unheated water exists, and the temperature of city water is relatively stable throughout the year.

  Therefore, by arranging the storage battery 71 under the hot water storage tank 35 so as to be in thermal contact with the lower end of the hot water storage tank 35, the temperature of the storage battery 71 is maintained relatively stably throughout the year. It is possible.

(1-2-2-4) High temperature side circuit 40
The high temperature side circuit 40 extends from an upper portion in the hot water storage tank 35, and is a circuit configured to extend to an intermediate portion in the hot water storage tank 35 after passing through a temperature adjustment jacket 48 described later. A warm pump 41 is provided. The high temperature side circuit 40 is configured to communicate with the hot water storage tank 35, and when the high temperature side pump 41 is driven, the high temperature hot water in the hot water storage tank 35 is sent into the temperature adjustment jacket 48, and the hot water storage is again performed. It is possible to circulate back to the intermediate part in the tank 35.

  In the high temperature side circuit 40, the position of returning to the hot water storage tank 35 after passing through the temperature adjustment jacket 48, that is, the height position of the hot water storage tank 35 is not particularly limited. It is preferable that it is higher than the position where the water supply passage 82 is connected and lower than the position where the high temperature side circuit 40 in the vicinity of the upper end in the hot water storage tank 35 extends. In the present embodiment, the hot water flowing through the high temperature side circuit 40 is returned to a height position between 60% and 90% of the height of the hot water storage tank 35.

(1-2-2-5) Temperature control jacket 48
The temperature adjustment jacket 48 is a member mainly for adjusting the temperature of the storage battery 71, and is installed under the storage battery 71 in a state of being in thermal contact with the lower end of the storage battery 71.

  A switching element storage portion 72 is installed under the temperature control jacket 48, and a lower portion of the temperature control jacket 48 and an upper portion of the switching element storage portion 72 are in thermal contact (this embodiment). In form, they are in direct contact.) The temperature adjustment jacket 48 is made of a metal having high thermal conductivity such as aluminum or an aluminum alloy. Therefore, heat is easily transmitted between the storage battery 71 and the switching element storage portion 72 and the temperature adjustment jacket 48.

  Inside this temperature adjustment jacket 48, a part of the high temperature side circuit 40 and a part of the cold heat storage tank connection circuit 50 pass. In the temperature control jacket 48, the hot water flowing through the high temperature side circuit 40 and the antifreeze liquid flowing through the cold heat storage tank coupling circuit 50 are configured not to be mixed with each other. Further, a part of the high temperature side circuit 40 inside the temperature control jacket 48 and a part of the cold storage tank connection circuit 50 are at the end of the temperature control jacket 48 on the storage battery 71 side and the end of the switching element storage part 72 side. In order to prevent partial temperature unevenness, the temperature adjustment jacket 48 is arranged uniformly. The temperature adjustment jacket 48 itself increases in temperature when the flow rate of the hot water flowing through the high temperature side circuit 40 increases or the temperature of the hot water increases, and the flow rate of the antifreeze liquid flowing through the cold heat storage tank connection circuit 50 increases or the temperature of the antifreeze solution increases. It becomes low temperature by becoming low.

  In this way, the temperature adjustment unit 8 is configured by adjusting the temperature of the temperature adjustment jacket 48 itself by the temperature of the hot water flowing through the high temperature side circuit 40 and the cold heat of the antifreeze liquid flowing through the cold heat storage tank connection circuit 50. That is, the heat of the temperature-adjusted temperature adjustment jacket 48 that is the temperature adjustment unit 8 is transmitted to the storage battery 71 and the switching element storage unit 72 that are the temperature adjustment target, and the temperature of the storage battery 71 and the switching element storage unit 72 Will be adjusted.

  Further, as described above, a part of the high temperature side circuit 40 and a part of the cold heat storage tank connection circuit 50 pass through the temperature adjustment jacket 48. And the external shape of the temperature control jacket 48 is the shape above the switching element accommodating part 72 so that the contact area with the storage battery 71 and the switching element accommodating part 72 may be ensured large, and it follows the shape below the storage battery 71. It is formed so as to follow. For this reason, it is difficult to ensure a sufficient contact area between the shape of part of the high-temperature side circuit 40 and the shape of part of the cold heat storage tank coupling circuit 50 with the shape of the storage battery 71 or the switching element storage part 72. Even if it exists, it can be made easy to transmit heat | fever by interposing the temperature control jacket 48 with high heat conductivity and sufficient contact area ensured.

(1-2-2-6) Switching element storage portion 72
The switching element storage unit 72 stores a switching element 72a and a converter 72b. The switching element 72a is used for an inverter included in the heat pump 2. Converter 72b is used to control charging and discharging of storage battery 71. Note that the inside of the switching element housing portion 72 is made of a metal such as aluminum or aluminum alloy having high thermal conductivity, and performs switching with respect to the switching element 72a and the converter 72b housed in the switching element housing portion 72. It is configured so that heat outside the element storage portion 72 can be easily transmitted.

  The switching element 72a and the converter 72b are heated during operation. The upper portion of the switching element housing portion 72 is disposed so as to be in thermal contact with the lower portion of the temperature adjustment jacket 48. Since the switching element housing portion 72 is in thermal contact with the temperature adjustment jacket 48, it is possible to maintain the switching element 72a and the converter 72b at a constant temperature, for example, by lowering the temperature.

(1-3) Operation Next, the operation of the hot water supply system 100 will be described.

(1-3-1) Cold storage operation The process of storing cold heat in the antifreeze liquid in the cold heat storage tank 6 is performed at the time of boiling for storing hot water in the hot water storage tank 35.

  When boiling is performed, the controller 7 drives the boiling pump 34 while driving the heat pump 2. The heat pump 2 receives a command from the controller 7, drives the compressor 21 and controls the expansion valve 23 to a desired opening degree, thereby circulating the refrigerant in the refrigerant circuit 20 to perform a refrigeration cycle. The boiling pump 34 is driven in response to an instruction from the controller 7, and causes low-temperature water existing below the hot water storage tank 35 to flow out to the boiling forward pipe 31. The water flowing through the boiling forward pipe 31 passes through the temperature control jacket 48 and reaches the water heat exchanger 22. In the water heat exchanger 22, heat exchange is performed between the water flowing in the boiling forward pipe 31 and the high-temperature refrigerant of the heat pump 2, and the water is heated to become hot water. The hot water returns to the vicinity of the upper end of the hot water storage tank 35 via the boiling return pipe 33.

  In the refrigerant circuit 20 in which the refrigeration cycle is performed, as shown in the Mollier diagram of FIG. 3, the refrigerant (see point a in FIG. 3) sucked into the compressor 21 is compressed by the compressor 21 and is heated at high temperature and pressure. (Refer to point b in FIG. 3), when the refrigerant flows through the refrigerant pipe 25 and passes through the refrigerant pipe 22r in the water heat exchanger 22, the heat exchange with the water flowing through the boiling forward pipe 31 is performed. And then dissipate heat (see point c in FIG. 3). The refrigerant after heat dissipation is decompressed by passing through the expansion valve 23, and becomes a low-temperature gas-liquid two-phase state (see point d in FIG. 3). The low-temperature and low-pressure refrigerant in the gas-liquid two-phase state flows to the cold storage refrigerant heat exchanger 24 and evaporates by exchanging heat with the antifreeze liquid in the cold storage tank 6 in the cold storage refrigerant heat exchanger 24. (See point a in FIG. 3). At this time, the antifreeze liquid in the cold heat storage tank 6 is cooled, and cold heat is accumulated. The refrigerant vaporized in the cold storage refrigerant heat exchanger 24 is sucked into the compressor 21 and compressed again to become a high-temperature and high-pressure refrigerant, and the above cycle is repeated.

  Thus, when the water in the hot water storage tank 35 is boiled, cold heat is accumulated in the antifreeze liquid in the cold heat storage tank 6.

  When hot water is supplied from the hot water storage tank 35 to a bathroom or the like, the hot water existing in the vicinity of the upper end of the hot water storage tank 35 flows out from the hot water outlet pipe 85 connected in the vicinity of the upper end. Hot water supplied via the hot water outlet 85 and water from the outside such as city water supplied via the mixing water supply channel 83 are mixed by the hot water mixing valve 84. The hot water mixed in this way is supplied to a bathroom or the like via a hot water supply pipe 86.

(1-3-2) Cold energy use operation The cold energy stored in the antifreeze liquid in the cold heat storage tank 6 is used in a cold energy use operation for adjusting the temperature of the storage battery 71 or the like as a temperature adjustment target.

  In the operation using cold heat, the controller 7 grasps the temperature detected by the storage battery temperature sensor 71a, and whether or not the grasped temperature is within a predetermined temperature range (a temperature range in which the storage battery 71 can be suitably operated). It is determined whether or not the temperature adjustment of the storage battery 71 is necessary. In the present embodiment, for example, when the temperature detected by the storage battery temperature sensor 71a is 40 ° C. or higher, the low temperature side pump 51 is driven to circulate the antifreeze liquid in the cold storage tank connection circuit 50, and the temperature adjustment jacket By reducing the temperature in 48, the temperature of the storage battery 71 is lowered. As described above, since the cold heat is stored in the antifreeze liquid in the cold heat storage tank 6, the storage battery 71 can be used even when the heat pump 2 is not driven or the boiling pump 34 is not driven. The temperature can be adjusted. That is, even when the heat pump 2 and the boiling pump 34 are driven or not driven, the temperature of the storage battery 71 can be adjusted regardless of the driving state.

  Here, if the temperature detected by the storage battery temperature sensor 71a is too low because the temperature in the temperature control jacket 48 is too low, and the temperature is below the predetermined temperature range, the controller 7 The side pump 41 is driven to circulate hot water in the high temperature side circuit 40. In the present embodiment, for example, when the temperature detected by the storage battery temperature sensor 71 a becomes 0 ° C. or less, the high temperature side pump 41 is driven to circulate hot water in the high temperature side circuit 40, and the temperature adjustment jacket 48. The temperature of the storage battery 71 is raised by raising the temperature of the battery. As described above, since the hot water is stored in the upper portion of the hot water storage tank 35, similarly to the cold heat stored in the cold heat storage tank 6, the heat pump 2 is not driven. Even in a situation where the boiling pump 34 is not driven, the temperature of the storage battery 71 can be adjusted. That is, regarding the temperature adjustment using the heating source, even if the heat pump 2 and the boiling pump 34 are driven or not driven, the storage battery 71 is independent of these driving conditions. The temperature can be adjusted.

  In this way, the temperature of the storage battery 71 that is a temperature adjustment target can be adjusted.

  The switching element 72a and the converter 72b accommodated in the switching element accommodation part 72 can be adjusted as a result by adjusting the temperature of the storage battery 71.

(1-4) Features of the first embodiment (1-4-1)
In the hot water supply system 100 according to the first embodiment, when the water in the hot water storage tank 35 is boiled, a refrigeration cycle is performed in the refrigerant circuit 20, and the refrigerant heat exchanger for cold storage that functions as a refrigerant evaporator in the refrigeration cycle. 24, the temperature of the storage battery 71 is adjusted.

  Here, the refrigeration cycle using the refrigerant circuit 20 is performed when boiling the water in the hot water storage tank 35. When the boiling is not performed, the refrigeration cycle is not performed, for example, the compressor 21 is stopped. . For this reason, in the situation where the refrigeration cycle is not performed in the refrigerant circuit 20, the refrigerant does not evaporate in the cold storage refrigerant heat exchanger 24, and thus cold heat cannot be obtained from the cold storage refrigerant heat exchanger 24. For this reason, when it is necessary to adjust the temperature of the storage battery 71 even when the refrigeration cycle is not performed in the refrigerant circuit 20, it is necessary to prepare a temperature adjusting device or the like separately.

  On the other hand, in the hot water supply system 100 of the first embodiment, the temperature adjustment unit 8 uses the cold heat of the antifreeze liquid that is cooled when the refrigerant passing through the cold heat storage tank connection circuit 50 evaporates in the cold heat storage tank 6. It can be stored as cold in the antifreeze. When the temperature of the storage battery 71 needs to be adjusted, regardless of whether or not the refrigeration cycle is performed in the refrigerant circuit 20, the temperature adjustment jacket 48 uses the cold heat stored in the antifreeze liquid in the cold heat storage tank 6. By adjusting the temperature, the temperature of the storage battery 71 arranged so as to be in thermal contact with the temperature of the temperature adjustment jacket 48 can be adjusted.

  Further, the hot water supply system 100 of the first embodiment boils the water in the hot water storage tank 35 by performing a refrigeration cycle in the refrigerant circuit 20, and stores the hot water in the hot water storage tank 35. The hot water stored above the hot water storage tank 35 is configured to be able to circulate in the temperature adjustment jacket 48 via the high temperature side circuit 40. For this reason, for example, in the case where the hot water supply system 100 is used in a cold district or the like, when the storage battery 71 needs to be heated, the temperature of the storage battery 71 is adjusted by obtaining the heat via the high temperature side circuit 40. Is possible. Then, it is possible to adjust the temperature of the storage battery 71 by using components necessary for boiling water in the hot water storage tank 35, both cold and hot. In addition, it is possible to expand the temperature range in which the temperature can be adjusted by using both cold and hot.

(1-4-2)
As described above, since the temperature of the storage battery 71 is always maintained within the operating temperature range, the life of the storage battery 71 can be extended.

  Moreover, in the above-described embodiment, the storage battery 71 is disposed so as to be in thermal contact with the lower portion of the hot water storage tank 35, and this portion has a temperature range substantially the same as the operating temperature range of the storage battery 71 throughout the year. Since it tends to be maintained, it is possible to easily adjust the temperature of the storage battery 71. For example, when the storage battery 71 is a lithium ion battery, the battery life can be extended at least twice compared to other conditions by suppressing the temperature rise by 10 ° C. at a discharge depth of 50%, and the temperature is 25 ° C. Keeping the battery back and forth can dramatically improve the battery life.

(1-4-3)
In the hot water supply system 100 of the first embodiment, a storage battery 71 is used. For this reason, for example, charging is performed during the night when the unit price of the electricity rate is relatively low, and using the power charged in the storage battery 71, the unit price of the electricity rate is relatively expensive during the daytime. The water in the hot water storage tank 35 can be boiled and the cold storage in the antifreeze liquid in the cold heat storage tank 6 can be performed.

  Moreover, although the use timing of the cold heat stored in the antifreeze liquid in the cold heat storage tank 6 is not particularly limited, for example, it can be used to suppress the heat generation of the storage battery 71 during charging at night.

(1-4-4)
In the hot water supply system 100 of the first embodiment, the temperature of the storage battery 71 that stores the electric power used in the hot water supply system 100 is adjusted using a heating source and a cooling source obtained by using the hot water supply system 100. Can do. For this reason, it is not necessary to provide the apparatus and system for adjusting the temperature of the storage battery 71 other than the hot water supply system 100 in which the storage battery 71 is used.

(1-4-5)
In the hot water supply system 100 according to the first embodiment, the antifreeze liquid circulates in the cold heat storage tank connection circuit 50, so that convection of the antifreeze liquid can be generated in the cold heat storage tank 6. Thereby, the heat exchange efficiency between the refrigerant | coolant which flows through the inside of the refrigerant | coolant heat exchanger 24 for cold storage arrange | positioned so that it may be immersed in the antifreeze liquid in the cold heat storage tank 6, and the antifreeze liquid in the cold heat storage tank 6 is improved. Can do.

(2) 2nd Embodiment The hot water supply system 200 which concerns on 2nd Embodiment is demonstrated using drawing.

  In FIG. 4, the schematic block diagram of the hot water supply system 200 which concerns on 2nd Embodiment of this invention is shown.

(2-1) Overall Configuration The hot water supply system 200 includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 in the same manner as the hot water supply system 100 according to the first embodiment described above, and a refrigerant instead of the heat pump 2. A heat pump 202 including a circuit 120 is provided. Since the hot water supply system 200 has substantially the same configuration as the hot water supply system 100, the description of the portion having the same configuration as the hot water supply system 100 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 100. FIG.

(2-2) Detailed configuration (2-2-1) Heat pump 202
Unlike the heat pump 2 of the hot water supply system 100, the heat pump 202 is provided with a refrigerant intermediate medium heat exchanger 124 instead of the cold storage refrigerant heat exchanger 24 immersed in the antifreeze liquid in the cold heat storage tank 6.

  The refrigerant intermediate medium heat exchanger 124 is not immersed in the antifreeze liquid in the cold heat storage tank 6, and constitutes part of the refrigerant circuit 120 and constitutes part of the intermediate heat medium connection circuit 60.

  The intermediate heat medium coupling circuit 60 has an intermediate pump 61 for circulating the antifreeze liquid between the cold heat storage tank 6 and the refrigerant intermediate medium heat exchanger 124.

  The refrigerant intermediate medium heat exchanger 124 includes a refrigerant passage 124r through which the refrigerant of the refrigerant circuit 120 flows, and a connected antifreeze liquid passage 62a through which the antifreeze liquid of the intermediate heat medium connection circuit 60 flows. The refrigerant intermediate medium heat exchanger 124 exchanges heat between the refrigerant flowing through the refrigerant passage 124r and the antifreeze liquid flowing through the connected antifreeze liquid passage 62a to evaporate the refrigerant and cool the antifreeze liquid.

The cold heat storage tank connection circuit 50 is the same as the hot water supply system 100 of the first embodiment, but is connected to the intermediate heat medium connection circuit 60 via the cold heat storage tank 6. For this reason, in the heat pump 202, the same antifreeze circulates in the intermediate heat medium connection circuit 60, the cold heat storage tank 6, and the cold heat storage tank connection circuit 50. Therefore, the cold heat held by the antifreeze liquid cooled in the refrigerant intermediate medium heat exchanger 124 can be used as it is for temperature adjustment of the storage battery 71 and the like in the temperature adjustment jacket 48.

  In addition, about the structure, operation | movement, etc. of the hot water storage unit 3, since it is the same as that of the said 1st Embodiment, description is abbreviate | omitted.

(2-3) Features of Second Embodiment In the hot water supply system 200 of the second embodiment, the effects described in (1-4-1) to (1-4-4) are obtained as in the first embodiment. Can play.

Further, in the hot water supply system 200, it is not necessary to arrange the refrigerant intermediate medium heat exchanger 124 of the refrigerant circuit 120 so as to be immersed in the antifreeze liquid in the cold heat storage tank 6 as in the first embodiment. For this reason, the freedom degree of arrangement | positioning of the refrigerant | coolant intermediate-medium heat exchanger 124 and the cold storage tank 6 can be raised.

(3) 3rd Embodiment The hot water supply system 300 which concerns on 3rd Embodiment is demonstrated using drawing.

  In FIG. 5, the schematic block diagram of the hot water supply system 300 which concerns on 3rd Embodiment of this invention is shown.

(3-1) Overall Configuration The hot water supply system 300 includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 as in the hot water supply system 100 according to the first embodiment described above, and a refrigerant instead of the heat pump 2. A heat pump 302 including the circuit 20 is provided. Since the hot water supply system 300 has substantially the same configuration as the hot water supply system 100, the description of the portion having the same configuration as the hot water supply system 100 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 100. FIG.

(3-2) Detailed configuration (3-2-1) Heat pump 302
Unlike the heat pump 2 of the hot water supply system 100, the heat pump 302 is filled in the cold heat storage tank 6 with slurry ice that is fluid ice in which fine ice particles and liquid such as salt water are mixed. The cold storage refrigerant heat exchanger 24 of the refrigerant circuit 20 is immersed in the slurry ice in the cold storage tank 6.

  Moreover, the heat pump 302 is provided with a cold heat storage tank independent circuit 150 instead of the cold heat storage tank connection circuit 50 of the first embodiment. The cold storage tank independent circuit 150 includes a cold storage heat exchanger 152 immersed in the slurry ice in the cold storage tank 6 and a low-temperature side pump 151 for circulating the antifreeze liquid to the cold storage tank independent circuit 150. . The cold storage tank independent circuit 150 circulates the antifreeze liquid between the cold storage heat exchanger 152 and the temperature control jacket 48. The cold heat storage heat exchanger 152 and the cold storage refrigerant heat exchanger 24 are both immersed in the slurry ice in the cold heat storage tank 6, but the refrigerant flowing in the two heat exchangers and the antifreeze liquid are not mixed. An independent circuit is configured.

  Further, in the present embodiment, the temperature adjustment unit 8a is configured by adjusting the temperature of the temperature adjustment jacket 48 itself by the temperature of the hot water flowing through the high temperature side circuit 40 and the cold heat of the antifreeze flowing through the cold storage tank independent circuit 150. Yes.

  In addition, about the structure, operation | movement, etc. of the hot water storage unit 3, since it is the same as that of the said 1st Embodiment, description is abbreviate | omitted.

(3-3) Features of Third Embodiment In the hot water supply system 300 of the third embodiment, the effects described in (1-4-1) to (1-4-4) are obtained in the same manner as in the first embodiment. Can play.

  In the hot water supply system 300, two heat exchangers, a cold storage heat exchanger 152 and a cold storage refrigerant heat exchanger 24, are immersed in the cold heat storage tank 6. The slurry ice in the cold heat storage tank 6 does not need to flow like the antifreeze circulating in the cold heat storage tank connection circuit 50 of the first and second embodiments. For this reason, the cool storage material filled in the cold heat storage tank 6 may be a material with low fluidity, and a material with excellent cold-retaining effect can be adopted although fluidity is low.

(4) 4th Embodiment The hot water supply system 400 which concerns on 4th Embodiment is demonstrated using drawing.

  In FIG. 6, the schematic block diagram of the hot water supply system 400 which concerns on 4th Embodiment of this invention is shown.

(4-1) Overall Configuration The hot water supply system 400 includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 in the same manner as the hot water supply system 100 according to the first embodiment described above, and a refrigerant instead of the heat pump 2. A heat pump 402 including a circuit 120 is provided. The hot water supply system 400 has substantially the same configuration as that of the hot water supply system 100, and thus the description of the portion having the same configuration as the hot water supply system 100 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 100. FIG.

(4-2) Detailed configuration (4-2-1) Heat pump 402
Unlike the heat pump 2 of the hot water supply system 100, the heat pump 402 employs the intermediate medium independent circuit 160 instead of the cold storage refrigerant heat exchanger 24, and has been described in the third embodiment instead of the cold heat storage tank connection circuit 50. A cold storage tank independent circuit 150 is employed.

  The intermediate medium independent circuit 160 includes an intermediate pump 161 for circulating the first antifreeze liquid between the cold heat storage tank 6 and the refrigerant intermediate medium heat exchanger 124.

  The refrigerant intermediate medium heat exchanger 124 has a refrigerant passage 124r through which the refrigerant of the refrigerant circuit 120 flows, and an independent antifreeze liquid passage 162a through which the first antifreeze liquid of the intermediate medium independent circuit 160 flows. The refrigerant intermediate medium heat exchanger 124 exchanges heat between the refrigerant flowing through the refrigerant passage 124r and the first antifreeze liquid flowing through the independent antifreeze liquid passage 162a, evaporates the refrigerant, and cools the first antifreeze liquid.

The configuration of the cold storage tank independent circuit 150 is as described in the third embodiment, but the second antifreeze liquid circulates inside. The cold storage heat exchanger 152 immersed in the first antifreeze liquid in the cold heat storage tank 6 of the heat pump 402 has a second antifreeze liquid flowing therein, and the second antifreeze liquid is separated from the first antifreeze liquid in the cold heat storage tank 6. Is configured not to mix. Therefore, the types of the first antifreeze circulating in the intermediate medium independent circuit 160 and the second antifreeze circulating in the cold storage tank independent circuit 150 can be different. In the present embodiment, the hot water flowing in the high temperature side circuit 40 is used. The temperature adjustment section 8a is configured by adjusting the temperature of the temperature adjustment jacket 48 itself by the temperature of the temperature and the temperature of the antifreeze flowing through the cold storage tank independent circuit 150.

  In addition, about the structure, operation | movement, etc. of the hot water storage unit 3, since it is the same as that of the said 1st Embodiment, description is abbreviate | omitted.

(4-3) Features of Fourth Embodiment In the hot water supply system 400 of the fourth embodiment, the effects described in (1-4-1) to (1-4-4) are obtained as in the first embodiment. Can play.

  Further, in this hot water supply system 400, the types of the first antifreeze liquid circulating in the intermediate medium independent circuit 160 and the second antifreeze liquid circulating in the cold storage tank independent circuit 150 can be different. An appropriate material can be selected according to the flow path resistance of the heat storage tank independent circuit 150, the type of the pump, and the like. For example, a material having a high cooling effect is selected as the first antifreeze circulating through the intermediate medium independent circuit 160, and the second antifreeze circulating through the cold storage tank independent circuit 150 has a high fluidity and is loaded on the low temperature side pump 151. It is possible to select a material that is difficult to impart.

Furthermore, in this hot water supply system 400, it is not necessary to arrange the refrigerant intermediate medium heat exchanger 124 of the refrigerant circuit 120 so as to be immersed in the antifreeze liquid in the cold heat storage tank 6 as in the first embodiment. For this reason, the freedom degree of arrangement | positioning of the refrigerant | coolant intermediate-medium heat exchanger 124 and the cold storage tank 6 can be raised. In the hot water supply system 400, the first antifreeze liquid circulates in the intermediate medium independent circuit 160, so that the convection of the first antifreeze liquid can be generated in the cold heat storage tank 6. Thereby, the cold storage heat exchanger 152 provided so as to be able to exchange heat with the first antifreeze liquid in the cold storage tank 6 improves the heat exchange efficiency between the first antifreeze liquid and the second antifreeze liquid flowing inside. Has been able to.

(5) Other Embodiments Each of the above-described embodiments can be a modified embodiment as described below.

(5-1) Other Embodiment A-1
In FIG. 7, the schematic block diagram of the hot water supply system 100a which concerns on other embodiment A-1 of this invention is shown.

(5-1-1) Overall Configuration The hot water supply system 100a includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 as in the hot water supply system 100 according to the first embodiment of the present invention. Instead, a heat pump 2a including a refrigerant circuit 20a is provided. Since the hot water supply system 100a has substantially the same configuration as that of the hot water supply system 100, the description of the portion having the same configuration as the hot water supply system 100 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 100. FIG.

(5-1-2) Detailed Configuration Unlike the heat pump 2 of the hot water supply system 100, the heat pump 2 a of the hot water supply system 100 a has an auxiliary heat exchanger 26 between the cold storage refrigerant heat exchanger 24 and the expansion valve 23 in the refrigerant circuit 20 a. Is connected. Further, an auxiliary fan 26F for supplying an air flow to the auxiliary heat exchanger 26 is provided. The arrangement of the auxiliary heat exchanger 26 and the auxiliary fan 26F is not particularly limited, but is arranged outdoors in the present embodiment. Further, an outside air temperature sensor 26 a for detecting the outside air temperature is provided on the upstream side of the air flow of the auxiliary heat exchanger 26.

(5-1-3) Operation In the refrigerant circuit 20a, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  When the auxiliary fan 26F is driven in the heat pump 2a during the boiling, the refrigerant depressurized by the expansion valve 23 after the heat release in the water heat exchanger 22 in the refrigerant circuit 20a evaporates in the auxiliary heat exchanger 26. Then, a refrigeration cycle is performed in which the refrigerant is further evaporated while cooling the antifreeze liquid in the cold storage refrigerant heat exchanger 24 and sucked into the compressor 21 again.

  On the other hand, when the auxiliary fan 26F is not driven in the heat pump 2a during boiling, the evaporation of the refrigerant in the cold storage refrigerant heat exchanger 24 is suppressed, and the refrigeration generally similar to the operation in the first embodiment is performed. A cycle is performed.

  Here, whether or not to drive the auxiliary fan 26F is determined by the controller 7 based on the level of evaporation capacity of the antifreeze liquid in the cold heat storage tank 6.

(5-1-4) Features of Other Embodiment A-1 The hot water supply system 100a of the other embodiment A-1 can provide the same effects as those of the first embodiment.

  Further, in this hot water supply system 100a, even when the cold storage refrigerant heat exchanger 24 cannot sufficiently evaporate the refrigerant in a situation where the cold heat is sufficiently accumulated in the antifreeze liquid in the cold heat storage tank 6, the auxiliary By driving the fan 26 </ b> F, the auxiliary heat exchanger 26 can evaporate the refrigerant.

  Thereby, it is possible to ensure a balance with the degree of heat dissipation in the water heat exchanger 22 when the refrigerant circuit 20a performs the refrigeration cycle.

(5-2) Other Embodiment A-2
In FIG. 8, the schematic block diagram of the hot water supply system 200a which concerns on other embodiment A-2 of this invention is shown.

(5-2-1) Overall Configuration The hot water supply system 200a includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 as in the hot water supply system 200 according to the second embodiment of the present invention. Instead, a heat pump 202a including a refrigerant circuit 120a is provided. Since the hot water supply system 200a has substantially the same configuration as the hot water supply system 200, the description of the portion having the same configuration as the hot water supply system 200 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 200. FIG.

(5-2-2) Detailed Configuration Unlike the heat pump 202 of the hot water supply system 200, the heat pump 202 a of the hot water supply system 200 a has an auxiliary heat exchanger 26 between the refrigerant intermediate medium heat exchanger 124 and the expansion valve 23 in the refrigerant circuit 120 a. Is connected. Further, an auxiliary fan 26F for supplying an air flow to the auxiliary heat exchanger 26 and an outside air temperature sensor 26a are provided, which is the same as in the other embodiment A-1.

(5-2-3) Operation In the refrigerant circuit 120a, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  When the auxiliary fan 26F is driven in the heat pump 202a during the boiling, the refrigerant depressurized by the expansion valve 23 after the heat radiation in the water heat exchanger 22 in the refrigerant circuit 120a evaporates in the auxiliary heat exchanger 26. Thereafter, the refrigerant intermediate medium heat exchanger 124 cools the antifreeze liquid, evaporates the refrigerant, and the refrigerant is sucked into the compressor 21 again.

  On the other hand, when the auxiliary fan 26F is not driven in the heat pump 202a at the time of boiling, evaporation of the refrigerant in the refrigerant intermediate medium heat exchanger 124 is suppressed, and the refrigeration generally similar to the operation in the second embodiment is performed. A cycle is performed.

  Here, whether or not to drive the auxiliary fan 26F is determined by the controller 7 based on the level of evaporation capacity of the antifreeze liquid in the cold heat storage tank 6.

(5-2-4) Features of Other Embodiment A-2 The hot water supply system 200a of the other embodiment A-2 can achieve the same effects as those of the second embodiment.

  Further, in this hot water supply system 200a, even when the refrigerant is not sufficiently evaporated by the refrigerant intermediate medium heat exchanger 124 in a situation where the cold heat is sufficiently accumulated in the antifreeze liquid in the cold heat storage tank 6, the auxiliary medium By driving the fan 26 </ b> F, the auxiliary heat exchanger 26 can evaporate the refrigerant.

  Thereby, when performing the refrigerating cycle in the refrigerant circuit 120a, it is possible to ensure a balance with the degree of heat radiation in the water heat exchanger 22.

  In particular, in the hot water supply system 200a of the other embodiment A-2, when the controller 7 determines that sufficient cold heat is stored in the antifreeze liquid in the cold heat storage tank 6, the boiling is being performed. Even so, the intermediate pump 61 can be stopped by driving the auxiliary fan 26F.

(5-3) Other Embodiment A-3
In FIG. 9, the schematic block diagram of the hot water supply system 300a which concerns on other embodiment A-3 of this invention is shown.

(5-3-1) Overall Configuration The hot water supply system 300a includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 as in the hot water supply system 300 according to the third embodiment of the present invention. Instead, a heat pump 302a including a refrigerant circuit 20a is provided. Since the hot water supply system 300a has substantially the same configuration as the hot water supply system 300, the description of the portion having the same configuration as the hot water supply system 300 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 300. FIG.

(5-3-2) Detailed Configuration Unlike the heat pump 302 of the hot water supply system 300, the heat pump 302 a of the hot water supply system 300 a has an auxiliary heat exchanger 26 between the cold storage refrigerant heat exchanger 24 and the expansion valve 23 in the refrigerant circuit 20 a. Is connected. Further, an auxiliary fan 26F for supplying an air flow to the auxiliary heat exchanger 26 and an outside air temperature sensor 26a are provided, which is the same as in the other embodiment A-1.

(5-3-3) Operation In the refrigerant circuit 20a, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  When the auxiliary fan 26F is driven in the heat pump 302a during the boiling, the refrigerant depressurized by the expansion valve 23 after the heat release in the water heat exchanger 22 in the refrigerant circuit 20a evaporates in the auxiliary heat exchanger 26. Then, a refrigeration cycle is performed in which the refrigerant ice evaporates while cooling the slurry ice in the cold storage refrigerant heat exchanger 24 and is sucked into the compressor 21 again.

  On the other hand, when the auxiliary fan 26F is not driven in the heat pump 302a during boiling, the evaporation of the refrigerant in the cold storage refrigerant heat exchanger 24 is suppressed, and the refrigeration generally similar to the operation in the first embodiment is performed. A cycle is performed.

  Here, whether or not to drive the auxiliary fan 26F is determined by the controller 7 based on the level of evaporation capacity of the antifreeze liquid in the cold heat storage tank 6.

(5-3-4) Features of Other Embodiment A-3 The hot water supply system 300a of the other embodiment A-3 can achieve the same effects as those of the third embodiment.

  Further, in this hot water supply system 300a, even when the cold storage refrigerant heat exchanger 24 cannot sufficiently evaporate the refrigerant in a situation where cold heat is sufficiently accumulated in the antifreeze liquid in the cold heat storage tank 6, the auxiliary By driving the fan 26 </ b> F, the auxiliary heat exchanger 26 can evaporate the refrigerant.

  Thereby, it is possible to ensure a balance with the degree of heat dissipation in the water heat exchanger 22 when the refrigerant circuit 20a performs the refrigeration cycle.

(5-4) Other Embodiment A-4
In FIG. 10, the schematic block diagram of the hot water supply system 400a which concerns on other embodiment A-4 of this invention is shown.

(5-4-1) Overall Configuration The hot water supply system 400a includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 as in the hot water supply system 400 according to the fourth embodiment of the present invention. Instead, a heat pump 402a including a refrigerant circuit 120a is provided. Since the hot water supply system 400a has substantially the same configuration as the hot water supply system 400, description of portions having the same configuration as the hot water supply system 400 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 400. FIG.

(5-4-2) Detailed Configuration The heat pump 402a of the hot water supply system 400a is different from the heat pump 402 of the hot water supply system 400 in the refrigerant circuit 120a between the refrigerant intermediate medium heat exchanger 124 and the expansion valve 23. Is connected. Further, an auxiliary fan 26F for supplying an air flow to the auxiliary heat exchanger 26 and an outside air temperature sensor 26a are provided, which is the same as in the other embodiment A-1.

(5-4-3) Operation In the refrigerant circuit 120a, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  When the auxiliary fan 26F is driven in the heat pump 402a during the boiling, the refrigerant depressurized by the expansion valve 23 after the heat release in the water heat exchanger 22 in the refrigerant circuit 120a evaporates in the auxiliary heat exchanger 26. Thereafter, the refrigerant intermediate medium heat exchanger 124 cools the first antifreeze liquid, and further the refrigerant evaporates and is again sucked into the compressor 21.

  On the other hand, when the auxiliary fan 26F is not driven in the heat pump 402a at the time of boiling, evaporation of the refrigerant in the refrigerant intermediate medium heat exchanger 124 is suppressed, and the refrigeration generally similar to the operation in the first embodiment is performed. A cycle is performed.

  Here, whether or not to drive the auxiliary fan 26F is determined by the controller 7 based on the level of evaporation capacity of the antifreeze liquid in the cold heat storage tank 6.

(5-4-4) Features of Other Embodiment A-4 In the hot water supply system 400a of the other embodiment A-4, the same effects as those of the fourth embodiment can be obtained.

  Further, in the hot water supply system 400a, even if the refrigerant intermediate medium heat exchanger 124 cannot sufficiently evaporate the refrigerant in the situation where the cold heat is sufficiently accumulated in the antifreeze liquid in the cold heat storage tank 6, the auxiliary By driving the fan 26 </ b> F, the auxiliary heat exchanger 26 can evaporate the refrigerant.

  Thereby, when performing the refrigerating cycle in the refrigerant circuit 120a, it is possible to ensure a balance with the degree of heat radiation in the water heat exchanger 22.

  In particular, in the hot water supply system 400a according to the other embodiment A-4, when the controller 7 determines that sufficient cold heat is stored in the antifreeze liquid in the cold heat storage tank 6, boiling is being performed. Even so, it is possible to stop the excessive heat storage operation by stopping the intermediate pump 161 by driving the auxiliary fan 26F.

(5-5) Other embodiment B-1
In FIG. 11, the schematic block diagram of the hot water supply system 100b which concerns on other embodiment B-1 of this invention is shown.

(5-5-1) Overall configuration The hot water supply system 100b includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7, as in the hot water supply system 100a according to the other embodiment A-1 of the present invention. A heat pump 2b including a refrigerant circuit 20b is provided instead of the heat pump 2a. Since the hot water supply system 100b has substantially the same configuration as the hot water supply system 100a, the description of the portion having the same configuration as the hot water supply system 100a is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 100a.

(5-5-2) Detailed Configuration The heat pump 2b of the hot water supply system 100b differs from the heat pump 2a of the hot water supply system 100a in the refrigerant circuit 20b between the cold storage refrigerant heat exchanger 24 and the auxiliary heat exchanger 26. 27 is connected.

(5-5-3) Operation In the refrigerant circuit 20b, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  Here, the controller 7 opens the valve openings of the expansion valve 23 and the auxiliary expansion valve 27 based on the degree of heat radiation in the water heat exchanger 22, the degree of evaporation in the cold storage refrigerant heat exchanger 24, and the detected temperature of the outside air temperature sensor 26a. Take control. Further, the controller 7 ensures that the air volume of the auxiliary fan 26F is balanced between the degree of heat radiation in the water heat exchanger 22 and the degree of evaporation in the cold storage refrigerant heat exchanger 24 based on the temperature detected by the outside air temperature sensor 26a. To control.

  Specifically, the degree of heat radiation in the water heat exchanger 22 is insufficient compared to the degree of evaporation in the cold storage refrigerant heat exchanger 24, for example, not much cold heat is stored in the antifreeze liquid in the cold heat storage tank 6. When the controller 7 determines, the controller 7 controls the expansion valve 23 to be fully opened, and controls the opening degree of the auxiliary expansion valve 27 so that the auxiliary expansion valve 27 reduces the pressure from the discharge pressure to the suction pressure. As a result, as shown in the Mollier diagram of FIG. 12, the refrigerant discharged from the compressor 21 (see point b in FIG. 12) dissipates heat while heating water in the water heat exchanger 22 (point c1 in FIG. 12). 12), passes through the fully opened expansion valve 23, further dissipates heat in the auxiliary heat exchanger 26 (see point c2 in FIG. 12), and then is reduced to the suction pressure in the auxiliary expansion valve 27 (see FIG. 12). (See point d). The decompressed refrigerant evaporates while cooling the antifreeze liquid in the cold storage refrigerant heat exchanger 24, is sucked into the compressor 21, and repeats the refrigeration cycle.

  On the other hand, for example, the degree of evaporation in the cold storage refrigerant heat exchanger 24 is insufficient compared to the degree of heat dissipation in the water heat exchanger 22 because the cold heat is sufficiently stored in the antifreeze liquid in the cold heat storage tank 6. The controller 7 controls the valve opening of the expansion valve 23 so as to reduce the pressure from the discharge pressure to the intermediate pressure at the expansion valve 23, and from the intermediate pressure to the suction pressure at the auxiliary expansion valve 27. The valve opening degree of the auxiliary expansion valve 27 is controlled so as to reduce the pressure. As a result, as shown in the Mollier diagram of FIG. 13, the refrigerant discharged from the compressor 21 (see point b in FIG. 13) dissipates heat while heating water in the water heat exchanger 22 (point c in FIG. 13). The pressure is reduced to the intermediate pressure at the expansion valve 23 (see point d1 in FIG. 13), evaporated at the auxiliary heat exchanger 26 (see point d2 in FIG. 13), and then reduced to the suction pressure at the auxiliary expansion valve 27. (See point d3 in FIG. 13). The decompressed refrigerant evaporates while cooling the antifreeze liquid in the cold storage refrigerant heat exchanger 24, is sucked into the compressor 21, and repeats the refrigeration cycle. Here, although what kind of pressure the intermediate pressure is controlled is not particularly limited, for example, the extent to which the refrigerant can be evaporated in the auxiliary heat exchanger 26 according to the temperature detected by the outside air temperature sensor 26a. It is preferable that the pressure is reduced to.

(5-5-4) Features of Other Embodiment B-1 The hot water supply system 100b of another embodiment B-1 can achieve the same effects as those of the other embodiment A-1.

  Further, in the hot water supply system 100b, the auxiliary heat exchanger 26 can function as a refrigerant radiator or an evaporator depending on the cold heat accumulation state in the antifreeze liquid in the cold heat storage tank 6. .

  For this reason, it becomes easier to ensure a balance between the degree of evaporation in the cold storage refrigerant heat exchanger 24 and the degree of heat dissipation in the water heat exchanger 22 according to the situation of the hot water supply system 100b.

(5-6) Other embodiment B-2
In FIG. 14, the schematic block diagram of the hot water supply system 200b which concerns on other embodiment B-2 of this invention is shown.

(5-6-1) Overall configuration The hot water supply system 200b includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7, as in the hot water supply system 200a according to another embodiment A-2 of the present invention. A heat pump 202b including a refrigerant circuit 120b is provided instead of the heat pump 202a. Since the hot water supply system 200b has substantially the same configuration as the hot water supply system 200a, the description of the portion having the same configuration as the hot water supply system 200a is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 200a.

(5-6-2) Detailed Configuration The heat pump 202b of the hot water supply system 200b differs from the heat pump 202a of the hot water supply system 200a in the refrigerant circuit 120b between the refrigerant intermediate medium heat exchanger 124 and the auxiliary heat exchanger 26. 27 is connected.

(5-6-3) Operation In the refrigerant circuit 120b, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  Here, the controller 7 opens the valve openings of the expansion valve 23 and the auxiliary expansion valve 27 based on the degree of heat release in the water heat exchanger 22, the degree of evaporation in the refrigerant intermediate medium heat exchanger 124, and the temperature detected by the outside air temperature sensor 26a. Take control. Further, the controller 7 ensures that the air volume of the auxiliary fan 26F is balanced between the degree of heat release in the water heat exchanger 22 and the degree of evaporation in the refrigerant intermediate medium heat exchanger 124 based on the temperature detected by the outside air temperature sensor 26a. To control.

  The operation here is the same as that of the other embodiment B-1, and the description thereof is omitted.

(5-6-4) Features of Other Embodiment B-2 The hot water supply system 200b of the other embodiment B-2 can achieve the same effects as those of the other embodiment A-2.

  In the hot water supply system 200b, the auxiliary heat exchanger 26 can function as a refrigerant radiator or an evaporator depending on the cold heat accumulation state in the antifreeze liquid in the cold heat storage tank 6. .

  For this reason, it is easier to ensure a balance between the degree of evaporation in the refrigerant intermediate medium heat exchanger 124 and the degree of heat dissipation in the water heat exchanger 22 according to the situation of the hot water supply system 200b.

(5-7) Other embodiment B-3
In FIG. 15, the schematic block diagram of the hot water supply system 300b which concerns on other embodiment B-3 of this invention is shown.

(5-7-1) Overall configuration The hot water supply system 300b includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7, like the hot water supply system 300a according to the other embodiment A-3 of the present invention, A heat pump 302b including a refrigerant circuit 20b is provided instead of the heat pump 302a. The hot water supply system 300b has substantially the same configuration as the hot water supply system 300a, and therefore, the description of the portion having the same configuration as the hot water supply system 300a is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 300a.

(5-7-2) Detailed configuration Unlike the heat pump 302a of the hot water supply system 300a, the heat pump 302b of the hot water supply system 300b has an auxiliary expansion valve between the cold storage refrigerant heat exchanger 24 and the auxiliary heat exchanger 26 in the refrigerant circuit 20b. 27 is connected.

(5-7-3) Operation In the refrigerant circuit 20b, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  Here, the controller 7 opens the valve openings of the expansion valve 23 and the auxiliary expansion valve 27 based on the degree of heat radiation in the water heat exchanger 22, the degree of evaporation in the cold storage refrigerant heat exchanger 24, and the detected temperature of the outside air temperature sensor 26a. Take control. Further, the controller 7 ensures that the air volume of the auxiliary fan 26F is balanced between the degree of heat radiation in the water heat exchanger 22 and the degree of evaporation in the cold storage refrigerant heat exchanger 24 based on the temperature detected by the outside air temperature sensor 26a. To control.

  The operation here is the same as that of the other embodiment B-1, and the description thereof is omitted.

(5-7-4) Features of Other Embodiment B-3 The hot water supply system 300b of another embodiment B-3 can achieve the same effects as those of the other embodiment A-3.

  In the hot water supply system 300b, the auxiliary heat exchanger 26 can function as a refrigerant radiator or an evaporator depending on the cold heat accumulation state in the antifreeze liquid in the cold heat storage tank 6. .

  For this reason, according to the situation of the hot water supply system 300b, it is easier to secure a balance between the degree of evaporation in the cold storage refrigerant heat exchanger 24 and the degree of heat dissipation in the water heat exchanger 22.

(5-8) Other embodiment B-4
In FIG. 16, the schematic block diagram of the hot water supply system 400b which concerns on other embodiment B-4 of this invention is shown.

(5-8-1) Overall Configuration The hot water supply system 400b includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7, as in the hot water supply system 400a according to other embodiment A-4 of the present invention. A heat pump 402b including a refrigerant circuit 120b is provided instead of the heat pump 402a. Since the hot water supply system 400b has substantially the same configuration as the hot water supply system 400a, the description of the portion having the same configuration as the hot water supply system 400a is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 400a.

(5-8-2) Detailed Configuration Unlike the heat pump 402a of the hot water supply system 400a, the heat pump 402b of the hot water supply system 400b has an auxiliary expansion valve between the refrigerant intermediate medium heat exchanger 124 and the auxiliary heat exchanger 26 in the refrigerant circuit 120b. 27 is connected.

(5-8-3) Operation In the refrigerant circuit 120b, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to raise the water in the hot water storage tank 35.

  Here, the controller 7 opens the valve openings of the expansion valve 23 and the auxiliary expansion valve 27 based on the degree of heat release in the water heat exchanger 22, the degree of evaporation in the refrigerant intermediate medium heat exchanger 124, and the temperature detected by the outside air temperature sensor 26a. Take control. Further, the controller 7 ensures that the air volume of the auxiliary fan 26F is balanced between the degree of heat release in the water heat exchanger 22 and the degree of evaporation in the refrigerant intermediate medium heat exchanger 124 based on the temperature detected by the outside air temperature sensor 26a. To control.

  The operation here is the same as that of the other embodiment B-1, and the description thereof is omitted.

(5-8-4) Features of Other Embodiment B-4 The hot water supply system 400b of another embodiment B-4 can provide the same effects as those of the other embodiment A-4.

  In the hot water supply system 400b, the auxiliary heat exchanger 26 can function as a refrigerant radiator or an evaporator depending on the cold heat accumulation state in the antifreeze liquid in the cold heat storage tank 6. .

  For this reason, it is easier to ensure a balance between the degree of evaporation in the refrigerant intermediate medium heat exchanger 124 and the degree of heat dissipation in the water heat exchanger 22 depending on the situation of the hot water supply system 400b.

(5-9) Other Embodiment C-1
In FIG. 17, the schematic block diagram of the hot water supply system 100c which concerns on other embodiment C-1 of this invention is shown.

(5-9-1) Overall Configuration The hot water supply system 100c includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7, as in the hot water supply system 100b according to another embodiment B-1 of the present invention. A heat pump 2c including a refrigerant circuit 20c is provided instead of the heat pump 2b. Since the hot water supply system 100c has substantially the same configuration as the hot water supply system 100b, the description of the portion having the same configuration as the hot water supply system 100b is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 100b.

(5-9-2) Detailed configuration Unlike the heat pump 2b of the hot water supply system 100b, the heat pump 2c of the hot water supply system 100c includes a portion between the auxiliary heat exchanger 26 and the auxiliary expansion valve 27 in the refrigerant circuit 20c, and a cold storage refrigerant. A bypass refrigerant circuit 28 that connects a portion between the heat exchanger 24 and the suction side of the compressor 21 is provided. The bypass refrigerant circuit 28 does not pass through the cold storage refrigerant heat exchanger 24, and a bypass refrigerant on-off valve 28a is provided in the middle.

(5-9-3) Operation In the refrigerant circuit 20c, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  Here, the controller 7 opens the valve openings of the expansion valve 23 and the auxiliary expansion valve 27 based on the degree of heat radiation in the water heat exchanger 22, the degree of evaporation in the cold storage refrigerant heat exchanger 24, and the detected temperature of the outside air temperature sensor 26a. Take control. Further, the controller 7 ensures that the air volume of the auxiliary fan 26F is balanced between the degree of heat radiation in the water heat exchanger 22 and the degree of evaporation in the cold storage refrigerant heat exchanger 24 based on the temperature detected by the outside air temperature sensor 26a. To control.

  Specifically, the degree of heat radiation in the water heat exchanger 22 is insufficient compared to the degree of evaporation in the cold storage refrigerant heat exchanger 24, for example, not much cold heat is stored in the antifreeze liquid in the cold heat storage tank 6. When the controller 7 determines, the controller 7 controls the expansion valve 23 to be fully opened, and controls the opening degree of the auxiliary expansion valve 27 so that the auxiliary expansion valve 27 reduces the pressure from the discharge pressure to the suction pressure. At this time, the bypass refrigerant on / off valve 28 a of the bypass refrigerant circuit 28 is controlled to be fully closed by the controller 7. As a result, the auxiliary heat exchanger 26 can function as a refrigerant radiator, and the shortage of the degree of heat radiation in the water heat exchanger 22 is compensated to balance the degree of evaporation in the cold storage refrigerant heat exchanger 24. It becomes possible.

  On the other hand, for example, the degree of evaporation in the cold storage refrigerant heat exchanger 24 is insufficient compared to the degree of heat dissipation in the water heat exchanger 22 because the cold heat is sufficiently stored in the antifreeze liquid in the cold heat storage tank 6. The controller 7 controls the valve opening of the expansion valve 23 so as to reduce the pressure from the discharge pressure to the intermediate pressure at the expansion valve 23, and from the intermediate pressure to the suction pressure at the auxiliary expansion valve 27. The valve opening degree of the auxiliary expansion valve 27 is controlled so as to reduce the pressure. At this time, the bypass refrigerant on / off valve 28 a of the bypass refrigerant circuit 28 is controlled to be fully closed by the controller 7. As a result, the auxiliary heat exchanger 26 can be made to function as a refrigerant evaporator, and the shortage of the degree of evaporation in the cold storage refrigerant heat exchanger 24 is compensated to balance the degree of heat radiation in the water heat exchanger 22. It becomes possible.

  Further, when the controller 7 determines that the cold heat is sufficiently stored in the antifreeze liquid in the cold heat storage tank 6 and the cold storage becomes excessive, the controller 7 fully opens the bypass refrigerant open / close valve 28a of the bypass refrigerant circuit 28. Switch to. Thereby, since the refrigerant | coolant flow in the refrigerant | coolant heat exchanger 24 for cold storage can be suppressed, it becomes possible to suppress the excessive cold storage operation | movement in the refrigerant | coolant heat exchanger 24 for cold storage.

(5-9-4) Features of Other Embodiment C-1 The hot water supply system 100c of the other embodiment C-1 can achieve the same effects as those of the other embodiment B-1.

  Further, in this hot water supply system 100c, when the controller 7 determines that the cold storage becomes excessive according to the cold heat accumulation state in the antifreeze liquid in the cold heat storage tank 6, the bypass refrigerant on-off valve 28a is switched to the fully opened state. Thus, it is possible to suppress an excessive cold storage operation in the cold storage refrigerant heat exchanger 24.

  Thereby, for example, excessive heat shrinkage of the device in the cold heat storage tank 6 can be prevented, and damage to the device can be reduced.

(5-10) Other embodiment C-2
In FIG. 18, the schematic block diagram of the hot water supply system 200c which concerns on other embodiment C-2 of this invention is shown.

(5-10-1) Overall configuration The hot water supply system 200c includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7, like the hot water supply system 200b according to another embodiment B-2 of the present invention, A heat pump 202c including a refrigerant circuit 120c is provided instead of the heat pump 202b. Since the hot water supply system 200c has substantially the same configuration as the hot water supply system 200b, the description of the portion having the same configuration as the hot water supply system 200b is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot water supply system 200b.

(5-10-2) Detailed configuration The heat pump 202c of the hot water supply system 200c is different from the heat pump 202b of the hot water supply system 200b, in the refrigerant circuit 120c, the portion between the auxiliary heat exchanger 26 and the auxiliary expansion valve 27, and the refrigerant intermediate medium A bypass refrigerant circuit 28 that connects a portion between the heat exchanger 124 and the suction side of the compressor 21 is provided. The bypass refrigerant circuit 28 does not pass through the refrigerant intermediate medium heat exchanger 124, and a bypass refrigerant on-off valve 28a is provided in the middle.

(5-10-3) Operation In the refrigerant circuit 120c, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  Here, the controller 7 opens the valve openings of the expansion valve 23 and the auxiliary expansion valve 27 based on the degree of heat release in the water heat exchanger 22, the degree of evaporation in the refrigerant intermediate medium heat exchanger 124, and the temperature detected by the outside air temperature sensor 26a. Take control. Further, the controller 7 ensures that the air volume of the auxiliary fan 26F is balanced between the degree of heat release in the water heat exchanger 22 and the degree of evaporation in the refrigerant intermediate medium heat exchanger 124 based on the temperature detected by the outside air temperature sensor 26a. To control.

  When the controller 7 determines that the cold heat is sufficiently stored in the antifreeze liquid in the cold heat storage tank 6 and the cold storage becomes excessive, the controller 7 switches the bypass refrigerant open / close valve 28a of the bypass refrigerant circuit 28 to the fully opened state. . Thereby, since the flow of the refrigerant in the refrigerant intermediate medium heat exchanger 124 can be suppressed, it is possible to suppress an excessive cold storage operation in the refrigerant intermediate medium heat exchanger 124.

  Since other operations are the same as those of the other embodiment C-1, description thereof will be omitted.

(5-10-4) Features of Other Embodiment C-2 The hot water supply system 200c of another embodiment C-2 can achieve the same effects as those of the other embodiment B-2.

  Further, in this hot water supply system 200c, when the controller 7 determines that the cold storage becomes excessive according to the cold heat accumulation state in the antifreeze liquid in the cold heat storage tank 6, the bypass refrigerant on-off valve 28a is switched to the fully opened state. In addition, it is possible to suppress an excessive cold storage operation in the refrigerant intermediate medium heat exchanger 124.

  Thereby, for example, excessive heat shrinkage in the refrigerant intermediate medium heat exchanger 124 can be prevented, and damage to the refrigerant intermediate medium heat exchanger 124 can be reduced.

  Further, when the bypass refrigerant on / off valve 28a is switched to the fully open state, the controller 7 can also stop the driving of the intermediate pump 61, thereby suppressing the power consumption of the intermediate pump 61.

(5-11) Other Embodiment C-3
In FIG. 19, the schematic block diagram of the hot water supply system 300c which concerns on other embodiment C-3 of this invention is shown.

(5-11-1) Overall configuration The hot water supply system 300c includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7, as in the hot water supply system 300b according to another embodiment B-3 of the present invention. A heat pump 302c including a refrigerant circuit 20c is provided instead of the heat pump 302b. Since the hot water supply system 300c has substantially the same configuration as the hot water supply system 300b, the description of the portion having the same configuration as the hot water supply system 300b is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 300b.

(5-11-2) Detailed Configuration Unlike the heat pump 302b of the hot water supply system 300b, the heat pump 302c of the hot water supply system 300c includes a portion between the auxiliary heat exchanger 26 and the auxiliary expansion valve 27 in the refrigerant circuit 20c, and a cold storage refrigerant. A bypass refrigerant circuit 28 that connects a portion between the heat exchanger 24 and the suction side of the compressor 21 is provided. The bypass refrigerant circuit 28 does not pass through the cold storage refrigerant heat exchanger 24, and a bypass refrigerant on-off valve 28a is provided in the middle.

(5-11-3) Operation In the refrigerant circuit 20c, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  Here, the controller 7 opens the valve openings of the expansion valve 23 and the auxiliary expansion valve 27 based on the degree of heat radiation in the water heat exchanger 22, the degree of evaporation in the cold storage refrigerant heat exchanger 24, and the detected temperature of the outside air temperature sensor 26a. Take control. Further, the controller 7 ensures that the air volume of the auxiliary fan 26F is balanced between the degree of heat radiation in the water heat exchanger 22 and the degree of evaporation in the cold storage refrigerant heat exchanger 24 based on the temperature detected by the outside air temperature sensor 26a. To control.

  When the controller 7 determines that the cold heat is sufficiently stored in the antifreeze liquid in the cold heat storage tank 6 and the cold storage becomes excessive, the controller 7 switches the bypass refrigerant open / close valve 28a of the bypass refrigerant circuit 28 to the fully opened state. . Thereby, since the refrigerant | coolant flow in the refrigerant | coolant heat exchanger 24 for cold storage can be suppressed, it becomes possible to suppress the excessive cold storage operation | movement in the refrigerant | coolant heat exchanger 24 for cold storage.

  Since other operations are the same as those of the other embodiment C-1, description thereof will be omitted.

(5-11-4) Features of Other Embodiment C-3 The hot water supply system 300c of another embodiment C-3 can achieve the same effects as those of the other embodiment B-3.

  Further, in the hot water supply system 300c, when the controller 7 determines that the cold storage becomes excessive according to the cold heat accumulation state in the antifreeze liquid in the cold heat storage tank 6, the bypass refrigerant on-off valve 28a is switched to the fully opened state. Thus, it is possible to suppress an excessive cold storage operation in the cold storage refrigerant heat exchanger 24.

  Thereby, for example, it is possible to prevent excessive heat shrinkage of the device in the cold heat storage tank 6 and reduce damage to the device.

(5-12) Other Embodiment C-4
In FIG. 20, the schematic block diagram of the hot water supply system 400c which concerns on other embodiment C-4 of this invention is shown.

(5-12-1) Overall Configuration The hot water supply system 400c includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7, like the hot water supply system 400b according to another embodiment B-4 of the present invention, A heat pump 402c including a refrigerant circuit 120c is provided instead of the heat pump 402b. Since the hot water supply system 400c has substantially the same configuration as the hot water supply system 400b, the description of the portion having the same configuration as the hot water supply system 400b is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 400b.

(5-12-2) Detailed configuration Unlike the heat pump 402b of the hot water supply system 400b, the heat pump 402c of the hot water supply system 400c includes a portion between the auxiliary heat exchanger 26 and the auxiliary expansion valve 27 and a refrigerant intermediate medium in the refrigerant circuit 120c. A bypass refrigerant circuit 28 that connects a portion between the heat exchanger 124 and the suction side of the compressor 21 is provided. The bypass refrigerant circuit 28 does not pass through the refrigerant intermediate medium heat exchanger 124, and a bypass refrigerant on-off valve 28a is provided in the middle.

(5-12-3) Operation In the refrigerant circuit 120c, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  Here, the controller 7 opens the valve openings of the expansion valve 23 and the auxiliary expansion valve 27 based on the degree of heat release in the water heat exchanger 22, the degree of evaporation in the refrigerant intermediate medium heat exchanger 124, and the temperature detected by the outside air temperature sensor 26a. Take control. Further, the controller 7 ensures that the air volume of the auxiliary fan 26F is balanced between the degree of heat release in the water heat exchanger 22 and the degree of evaporation in the refrigerant intermediate medium heat exchanger 124 based on the temperature detected by the outside air temperature sensor 26a. To control.

  When the controller 7 determines that the cold heat is sufficiently stored in the antifreeze liquid in the cold heat storage tank 6 and the cold storage becomes excessive, the controller 7 switches the bypass refrigerant open / close valve 28a of the bypass refrigerant circuit 28 to the fully opened state. . Thereby, since the flow of the refrigerant in the refrigerant intermediate medium heat exchanger 124 can be suppressed, it is possible to suppress an excessive cold storage operation in the refrigerant intermediate medium heat exchanger 124.

  Since other operations are the same as those of the other embodiment C-1, description thereof will be omitted.

(5-12-4) Features of Other Embodiment C-4 The hot water supply system 400c of the other embodiment C-4 can achieve the same effects as those of the other embodiment B-4.

  Further, in this hot water supply system 400c, when the controller 7 determines that the cold storage becomes excessive according to the cold heat accumulation state in the antifreeze liquid in the cold heat storage tank 6, the bypass refrigerant on-off valve 28a is switched to the fully opened state. In addition, it is possible to suppress an excessive cold storage operation in the refrigerant intermediate medium heat exchanger 124.

  Thereby, for example, excessive heat shrinkage in the refrigerant intermediate medium heat exchanger 124 can be prevented, and damage to the refrigerant intermediate medium heat exchanger 124 can be reduced.

  Further, when the bypass refrigerant on / off valve 28a is switched to the fully open state, the controller 7 can also stop the driving of the intermediate pump 61, thereby suppressing the power consumption of the intermediate pump 61.

(5-13) Other embodiment D
In FIG. 21, the schematic block diagram of the hot water supply system 100d which concerns on other Embodiment D of this invention is shown.

(5-13-1) Overall Configuration The hot water supply system 100d includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 as in the hot water supply system 100 according to the first embodiment of the present invention. Instead, a heat pump 2d including a refrigerant circuit 20 is provided. Since the hot water supply system 100d has substantially the same configuration as the hot water supply system 100, the description of the portion having the same configuration as the hot water supply system 100 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 100. FIG.

(5-13-2) Detailed configuration Unlike the heat pump 2 of the hot water supply system 100, the heat pump 2d of the hot water supply system 100d includes a cold heat storage tank connection circuit 50d instead of the cold heat storage tank connection circuit 50.

  The cold heat storage tank connection circuit 50 d is a circuit for circulating the antifreeze liquid in the cold heat storage tank 6 to the temperature adjustment jacket 48 and circulating the antifreeze liquid in the cold heat storage tank 6 into the temperature adjustment jacket 48. 51d.

  This cold storage tank connection circuit 50d is in the middle of sending the antifreeze liquid in the cold storage tank 6 into the temperature adjustment jacket 48 and passes through the low temperature side pump 51d, and from the temperature adjustment jacket 48 into the cold storage tank 6. A bypass antifreeze circuit 55 is provided for connecting a portion in the middle of sending the antifreeze. In the middle of the bypass antifreeze liquid circuit 55, a bypass antifreeze liquid opening / closing valve 56 is provided.

(5-13-3) Operation In the refrigerant circuit 20, the boiling pump 34 is driven in the hot water storage circuit 30 and a refrigeration cycle is performed to boil water in the hot water storage tank 35.

  Here, the controller 7 drives the low temperature side pump 51d in the state where boiling is performed. In the state in which the low temperature side pump 51d is driven, the controller 7 has the temperature detected by the storage battery temperature sensor 71a of the storage battery 71 within a predetermined temperature range (a temperature range within which the storage battery 71 can be suitably operated). If it exceeds the range, the bypass antifreeze liquid on-off valve 56 is fully closed to circulate the antifreeze liquid between the cold heat storage tank 6 and the temperature control jacket 48 to use the cold heat. The temperature of the stored storage battery 71 is adjusted.

  In addition, the controller 7 fully opens the bypass antifreeze liquid on-off valve 56 even when the temperature detected by the storage battery temperature sensor 71a of the storage battery 71 is within a predetermined temperature range in a state where boiling is performed. Then, the low temperature side pump 51d is driven. Accordingly, convection can be generated in the antifreeze liquid in the cold heat storage tank 6, and the refrigerant in the cold storage heat exchanger 24 immersed in the antifreeze liquid in the cold heat storage tank 6 and the antifreeze liquid in the cold heat storage tank 6 can be obtained. The heat exchange efficiency is improved.

(5-13-3) Features of Other Embodiment D In the hot water supply system 100d of the other embodiment D, the same effects as those of the first embodiment can be obtained.

  Further, in this hot water supply system 100d, even when the temperature of the storage battery 71 is not required to be adjusted, the unnecessary temperature of the storage battery 71 is increased by driving the low temperature side pump 51d with the bypass antifreeze liquid on / off valve 56 fully opened. While avoiding the adjustment, it is possible to improve the heat exchange efficiency between the refrigerant in the cold storage refrigerant heat exchanger 24 and the antifreeze liquid in the cold heat storage tank 6.

(5-14) Other Embodiment E-1
In FIG. 22, the schematic block diagram of the hot water supply system 100e which concerns on other embodiment E-1 of this invention is shown.

(5-14-1) Overall Configuration The hot water supply system 100e includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 as in the hot water supply system 100 according to the first embodiment of the present invention. Instead, a heat pump 2e including a refrigerant circuit 20 is provided. Since the hot water supply system 100e has substantially the same configuration as that of the hot water supply system 100, description of portions having the same configuration as the hot water supply system 100 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 100. FIG.

(5-14-2) Detailed Configuration Unlike the heat pump 2 of the hot water supply system 100, the heat pump 2e of the hot water supply system 100e includes a heat pipe 50e instead of the cold heat storage tank connection circuit 50.

  The heat pipe 50e has a working liquid sealed therein, a portion immersed in an antifreeze liquid (which may be slurry ice in the present embodiment) in the cold heat storage tank 6, and a temperature adjustment jacket 48. The parts located inside are connected. In the heat pipe 50e, when the state of the working fluid filled therein changes, the heat pipe 50e moves from the cold heat storage tank 6 to the temperature adjustment jacket 48 to transmit cold heat.

  In the present embodiment, the temperature adjustment unit 8b is configured such that the temperature of the temperature adjustment jacket 48 itself is adjusted by the temperature of the hot water flowing through the high temperature side circuit 40 and the cold heat of the working fluid moving in the heat pipe 50e. Yes.

(5-14-3) Operation In the refrigerant circuit 20, the boiling pump 34 is driven in the hot water storage circuit 30, and a refrigeration cycle is performed to boil water in the hot water storage tank 35.

  In addition, in the cold heat storage tank connection circuit 50 of the first embodiment, the antifreeze liquid is circulated by the low temperature side pump 51. However, in the heat pipe 50e of the present embodiment, the state of the working fluid sealed inside changes. Therefore, since it moves spontaneously, the low temperature side pump 51 and its operation control which the cold storage tank connection circuit 50 of 1st Embodiment has are unnecessary.

  Since other operations are the same as those in the first embodiment, description thereof is omitted.

(5-14-4) Features of Other Embodiment E-1 The hot water supply system 100e of the other embodiment E-1 can achieve the same effects as those of the first embodiment.

Further, in the hot-water supply system 100 e, the low temperature-side pump 51 of the first embodiment is not necessary, the operation control is also required, thermostatted cold antifreeze in spontaneously cold heat storage tank 6 in a heat pipes 50e It is possible to convey within the jacket 48.

(5-15) Other embodiment E-2
In FIG. 23, the schematic block diagram of the hot water supply system 200e which concerns on other embodiment E-2 of this invention is shown.

(5-15-1) Overall Configuration The hot water supply system 200e includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 as in the hot water supply system 200 according to the second embodiment of the present invention. Instead, a heat pump 202e is provided. Since the hot water supply system 200e has substantially the same configuration as the hot water supply system 200, the description of the portion having the same configuration as the hot water supply system 200 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 200. FIG.

(5-15-2) Detailed Configuration Unlike the heat pump 202 of the hot water supply system 200, the heat pump 202e of the hot water supply system 200e includes a heat pipe 50e instead of the cold heat storage tank connection circuit 50.

  The heat pipe 50e has a working liquid sealed therein, a portion immersed in an antifreeze liquid (which may be slurry ice in the present embodiment) in the cold heat storage tank 6, and a temperature adjustment jacket 48. The parts located inside are connected. In the heat pipe 50e, when the state of the working fluid filled therein changes, the heat pipe 50e moves from the cold heat storage tank 6 to the temperature adjustment jacket 48 to transmit cold heat.

  In the present embodiment, the temperature adjustment unit 8b is configured by adjusting the temperature of the temperature adjustment jacket 48 itself by the temperature of the hot water flowing through the high temperature side circuit 40 and the cold heat of the working fluid moving in the heat pipe 50e. Yes.

(5-15-3) Operation In the refrigerant circuit 120, the boiling pump 34 is driven in the hot water storage circuit 30, and the refrigeration cycle is performed to boil water in the hot water storage tank 35.

  In the cold storage tank coupling circuit 50 of the second embodiment, the antifreeze liquid is circulated by the low temperature side pump 51. However, in the heat pipe 50e of the present embodiment, the state of the working fluid sealed inside changes. Therefore, since it moves spontaneously, the low temperature side pump 51 and its operation control which the cold storage tank connection circuit 50 of 2nd Embodiment has are unnecessary.

  Since other operations are the same as those in the second embodiment, description thereof is omitted.

(5-15-4) Features of Other Embodiment E-2 The hot water supply system 200e of another embodiment E-2 can achieve the same effects as those of the second embodiment.

Further, in the hot water supply system 200e, cold side pump 51 of the second embodiment is not necessary, the operation control is also required, thermostatted cold antifreeze in spontaneously cold heat storage tank 6 in a heat pipes 50e It is possible to convey within the jacket 48.

(5-16) Other Embodiment F-1
In FIG. 24, the schematic block diagram of the hot water supply system 100f which concerns on other embodiment F-1 of this invention is shown.

(5-16-1) Overall Configuration The hot water supply system 100f includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 as in the hot water supply system 100 according to the first embodiment of the present invention. Instead, a heat pump 2f is provided. Since the hot water supply system 100f has substantially the same configuration as the hot water supply system 100, the description of the portion having the same configuration as the hot water supply system 100 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 100. FIG.

(5-16-2) Detailed Configuration Unlike the heat pump 2 of the hot water supply system 100, the heat pump 2f of the hot water supply system 100f further includes a cold water supply circuit 90.

  The cold water supply circuit 90 is a circuit that guides water supplied from city water to the faucet 92, and is provided with a cold water heat exchanger 91 that is immersed in the antifreeze liquid in the cold heat storage tank 6.

  The city water flowing through the cold water heat exchanger 91 is cooled by the cold heat held by the antifreeze liquid in the cold heat storage tank 6. For this reason, it is possible to supply cold water having a temperature lower than that of city water from the faucet 92 of the cold water supply circuit 90.

(5-16-3) Operation In the refrigerant circuit 20, the boiling pump 34 is driven in the hot water storage circuit 30 and a refrigeration cycle is performed to boil water in the hot water storage tank 35.

  Since other operations are the same as those in the first embodiment, description thereof will be omitted.

(5-16-4) Features of Other Embodiment F-1 The hot water supply system 100f of the other embodiment F-1 can provide the same effects as those of the first embodiment.

  In addition, the cold heat held in the antifreeze liquid in the cold heat storage tank 6 can be used for temperature adjustment of the storage battery 71 and cold water supply via the cold water supply circuit 90.

(5-17) Other embodiment F-2
In FIG. 25, the schematic block diagram of the hot water supply system 200f which concerns on other embodiment F-2 of this invention is shown.

(5-17-1) Overall Configuration The hot water supply system 200f includes the hot water storage unit 3 including the hot water storage circuit 30 and the controller 7 as in the hot water supply system 200 according to the second embodiment of the present invention. Instead, a heat pump 202f is provided. Since the hot water supply system 200f has substantially the same configuration as the hot water supply system 200, the description of the portion having the same configuration as the hot water supply system 200 is omitted. Below, it demonstrates focusing on the part which has a different structure from the hot-water supply system 200. FIG.

(5-17-2) Detailed Configuration Unlike the heat pump 202 of the hot water supply system 200, the heat pump 202f of the hot water supply system 200f further includes a cold water supply circuit 90.

  The cold water supply circuit 90 is a circuit that guides water supplied from city water to the faucet 92, and is provided with a cold water heat exchanger 91 that is immersed in the antifreeze liquid in the cold heat storage tank 6.

  The city water flowing through the cold water heat exchanger 91 is cooled by the cold heat held by the antifreeze liquid in the cold heat storage tank 6. For this reason, it is possible to supply cold water having a temperature lower than that of city water from the faucet 92 of the cold water supply circuit 90.

(5-17-3) Operation In the refrigerant circuit 20, the boiling pump 34 is driven in the hot water storage circuit 30 and a refrigeration cycle is performed to boil water in the hot water storage tank 35.

  Since other operations are the same as those in the second embodiment, description thereof will be omitted.

(5-17-4) Features of Other Embodiment F-2 The hot water supply system 200f of the other embodiment F-2 can provide the same effects as those of the second embodiment.

  In addition, the cold heat held in the antifreeze liquid in the cold heat storage tank 6 can be used for temperature adjustment of the storage battery 71 and cold water supply via the cold water supply circuit 90.

(5-18) Other embodiment G
In the first to fourth embodiments and the other embodiments A-1 to F-2, the casing of the hot water storage unit 3 is not particularly specified, for example, as shown in FIG. The photovoltaic power generation panel S may be attached to the outer surface of 3p. Specifically, the photovoltaic power generation panel S may be provided on each side surface and top surface of the casing 3p.

  By providing the solar power generation panel S on the outer surface of the hot water storage unit 3, the solar power generation panel S can receive sunlight and generate electric power to obtain electric power. The electric power generated in this way may be used as drive power in the heat pump, or may be used as drive power in the hot water storage unit. Moreover, even if it is a case where it is not used as drive electric power in a heat pump or a hot water storage unit, it can be used for charging the storage battery 71. Furthermore, the electric power charged in the storage battery 71 in this way may be used as driving electric power when driving the heat pump or the hot water storage unit later.

  Moreover, by attaching the photovoltaic power generation panel S to the outer surface of the casing 3p of the hot water storage unit 3 in this way, it becomes possible not only to use the power generated by the photovoltaic power generation but also to the casing 3p by the thermal energy from sunlight. It is possible to suppress an increase in the temperature inside. Thereby, it can suppress that the temperature of the storage battery 71 rises out of an appropriate temperature range.

(5-19) Other embodiment H
In the first to fourth embodiments and the other embodiments A-1 to F-2, the temperature adjustment jacket 48 and the like, for example, as shown in FIG. Phase change layers 79 are provided between the storage batteries 71 and between the temperature adjustment jacket 48 and the switching element storage portion 72.

  Although the phase change layer 79 is not particularly limited, in the present embodiment, the phase change layer 79 is mainly composed of a latent heat storage material containing paraffin. This latent heat storage material is configured to change phase from solid to liquid at a predetermined temperature. In the present embodiment, the phase change from a solid to a liquid is performed at a temperature higher than a predetermined temperature range in which the operation of the storage battery 71 can be suitably maintained (for example, a temperature near 60 ° C.).

  Thus, since the phase change layer 79 is interposed between the temperature control jacket 48 and the switching element 72a and the converter 72b stored in the storage battery 71 and the switching element storage section 72 that are the temperature control targets, Even if a situation in which the temperature adjustment target is excessively heated, such as an excessive amount of heat obtained from the hot water flowing through the side circuit 40, is likely to occur, the latent heat storage material of the phase change layer 79 is excessively heated. Heat energy can be consumed as energy required for latent heat change. For this reason, while the latent heat storage material of the phase change layer 79 is changing the latent heat, the temperature increase of the latent heat storage material can be suppressed, so that it is stored in the storage battery 71 or the switching element storage unit 72 as the temperature adjustment target. It is possible to suppress the temperature of the switching element 72a and the converter 72b being excessively increased.

  In the other embodiment H, the phase change layer 79 is not necessarily disposed above and below the temperature control jacket 48. For example, among the storage battery 71, the switching element 72a, and the converter 72b, the phase change layer 79 is preferably driven. You may make it arrange | position only between the thing with the lowest temperature range, and the temperature control jacket 48. FIG.

(5-20) Other Embodiment I
In the said 1st Embodiment-4th Embodiment and other embodiment A-1-other embodiment F-2, a part of high temperature side circuit 40 inside the temperature control jacket 48, and the cold storage tank connection circuit 50 50d, part of the heat pipe 50e and part of the cold storage tank independent circuit 150 are partially heated at the end of the temperature control jacket 48 on the storage battery 71 side and the end of the switching element storage part 72 side. The case where the temperature control jacket 48 is arranged evenly so as not to cause unevenness has been described as an example.

  On the other hand, the arrangement in the temperature adjustment jacket 48 is not particularly limited, and for example, as shown in FIG. 28, the temperature adjustment jacket 208 may be configured to have a temperature adjustment unit 208.

  The temperature adjustment unit 208 includes a temperature adjustment jacket 248.

  In the temperature control jacket 248, a part of the high temperature side circuit 40, a part of the cold heat storage tank connection circuits 50 and 50d, a part of the heat pipe 50e, and a part of the cold heat storage tank independent circuit 150 are located. The temperature control jacket 248 is made of a metal having high thermal conductivity such as aluminum or an aluminum alloy. In addition, the switching element storage portion 72 that stores the storage battery 71, the switching element 72 a, and the converter 72 b is arranged in the horizontal direction above the temperature control jacket 248 and below the hot water storage tank 35.

  Here, a part where the high temperature side circuit 40 inside the temperature control jacket 248 is located, a part of the cold heat storage tank connection circuits 50 and 50d, a part of the heat pipe 50e, and the cold heat storage tank independent circuit 150. The temperature control jacket 248 as a whole is not evenly arranged with the part where the part of the temperature control jacket 248 is located. By arranging in this way, for example, when there are a plurality of types of temperature control targets and their preferable temperature ranges are different, the temperature control jacket 248 is made so that it is easy to approach the more preferable temperature range. The part where the high temperature side circuit 40 inside the part is located, the part of the cold heat storage tank connection circuits 50, 50d, the part of the heat pipe 50e, and the part of the cold heat storage tank independent circuit 150 are located. It is possible to assign the arrangement of parts.

  For example, when the preferable temperature range of the storage battery 71 is lower than the preferable temperature range of the switching element 72a or the converter 72b stored in the switching element storage portion 72, the cooling battery 71 is placed on the side where the storage battery 71 is disposed. The part where the part of the heat storage tank connection circuits 50 and 50d, the part of the heat pipe 50e and the part of the cold heat storage tank independent circuit 150 are located is arranged, and on the side where the switching element storage part 72 is arranged, An arrangement configuration can be adopted so that a portion where a part of the high temperature side circuit 40 is located is arranged.

(5-21) Other embodiment J
In the first to fourth embodiments and the other embodiments A-1 to F-2, the cooling source and the heating source are thermally mixed in the temperature adjustment jacket 48, and the temperature adjustment target is used. As an example, the case where heat is transferred to the storage battery 71 and the switching element 72a and the converter 72b housed in the switching element housing 72 has been described.

  On the other hand, the temperature adjustment method of the temperature adjustment target is not particularly limited, and for example, as shown in FIG. 29, a temperature adjustment unit 308 may be provided.

  The temperature adjusting unit 308 includes a cooling source jacket 348a and a heating source jacket 348b.

Cooling source jacket 348a is inside, cold heat storage tank connected circuit 50,50D, heat pipes 50e, or is passed through a portion of the cold storage tank independent circuit 150, thermal conductivity such as aluminum or aluminum alloy It is made of high metal. The cooling source jacket 348a is disposed so that heat can be transmitted from above to the storage element 71 and the switching element 72a and the converter 72b accommodated in the switching element accommodation portion 72.

  The heat source jacket 348b allows a part of the high temperature side circuit 40 to pass through and is made of a metal having high thermal conductivity such as aluminum or an aluminum alloy. The heating source jacket 348b is arranged so that heat can be transmitted from below to the switching element 72a and the converter 72b housed in the storage battery 71 and the switching element housing portion 72 via the phase change layer 79. .

  That is, in the present embodiment, the heating source jacket 348b, the phase change layer 79, the storage battery 71, the switching element storage portion 72, and the cooling source jacket 348a are arranged in order from the bottom to the top.

  As described above, the temperature adjustment unit 308 includes the cooling source jacket 348a and the heating source jacket 348b that are separated from each other, so that the heating source and the cooling source can be arranged at different positions according to the respective purposes. It has become.

  The phase change layer 79 disposed between the heat source jacket 348b, the storage battery 71, and the switching element storage portion 72 is the same as the phase change layer 79 described in the other embodiment H. Here, the hot water having the highest temperature in the hot water storage tank 35 is supplied and provided only on the side of the heat source jacket 348b that is expected to become high temperature, and on the side of the cooling source jacket 348a that is unlikely to become high temperature. The arrangement of the phase change layer 79 can be omitted.

(5-22) Other embodiment K
In the first to fourth embodiments and the other embodiments A-1 to F-2, the cooling source and the heating source are thermally mixed in the temperature adjustment jacket 48, and the temperature adjustment target is used. As an example, the case where heat is transferred to the storage battery 71 and the switching element 72a and the converter 72b housed in the switching element housing 72 has been described.

  On the other hand, the temperature adjustment method of the temperature adjustment target is not particularly limited, and for example, as shown in FIG. 30, a temperature adjustment unit 408 may be provided.

The temperature adjusting unit 408 is not provided with a temperature regulating jacket 48 or the like, side direct contact as cold storage tank connected circuit 50,50d the battery 71, the heat pipes 50e, or, one of the cold heat storage tank independent circuit 150 The part is wound, and a part of the high temperature side circuit 40 is wound around the outer periphery thereof.

  Even with such a configuration, it is possible to perform temperature adjustment of a temperature adjustment target such as the storage battery 71.

(5-23) Other embodiment M
The refrigerant flowing through the refrigerant circuit of each of the above embodiments is not particularly limited, and may be, for example, an HFC refrigerant such as R32 or R401A, or a carbon dioxide refrigerant.

(5-24) Other embodiment N
In each of the above embodiments, the case where a lithium ion battery is used as the storage battery 71 has been described as an example. However, the storage battery 71 is not limited to this, and may be another type of storage battery such as a nickel metal hydride battery.

(5-25) Other embodiment O
In each of the above-described embodiments, the case where the temperature detected by the storage battery temperature sensor 71a exceeds the proper operating range has been described as an example of the condition for adjusting the temperature of the storage battery 71.

  However, the condition for adjusting the temperature of the storage battery 71 is not limited to this. For example, the temperature detected by the outdoor temperature sensor that can detect the outdoor temperature may exceed the predetermined appropriate operating range.

(5-26) Other embodiment P
In each said embodiment, the case where the water heat exchanger 22 was provided in the heat pump side was mentioned as an example, and was demonstrated.

  However, the arrangement of the water heat exchanger 22 is not particularly limited, and may be arranged in the hot water storage unit 3, for example.

(5-27) Other Embodiment Q
As long as there is no reason to inhibit each other, the above embodiments may be appropriately combined with each other as long as those skilled in the art can.

  The present invention is useful for a heat pump hot water supply system including a storage battery.

2, 2a, 2b, 2c, 2d, 2e, 2f, 202, 202a, 202b, 202c, 202e, 202f, 302, 302a, 302b, 302c, 402, 402a, 402b, 402c Heat pump 3 Hot water storage unit 6, 60 Cold storage Tank (Cool energy storage temperature control means)
7 Controller (control unit, heat storage use control unit when stopped)
8, 8a, 8b Temperature controller (cold heat storage temperature control means)
20, 20a, 20b, 20c, 120, 120a, 120b, 120c Refrigerant circuit 21 Compressor 22 Water heat exchanger (heat radiator)
23 Expansion valve (expansion mechanism)
24 Refrigerant heat exchanger for cold storage (evaporator)
124 Refrigerant intermediate medium heat exchanger (evaporator)
26 Auxiliary heat exchanger (heat exchanger)
26a Outside temperature sensor (temperature detection means)
26F Auxiliary fan (fan)
27 Intermediate expansion valve (intermediate expansion mechanism)
28 Bypass refrigerant circuit 28a Bypass refrigerant on-off valve (bypass refrigerant on-off mechanism)
30 Hot water storage circuit 34 Boiling pump (hot water storage circuit flow rate adjusting means)
35 Hot water storage tank 40 High temperature side circuit (High temperature side adjustment means)
41 High-temperature side pump 48 Temperature control jacket (temperature control intervening part)
50, 50d Cold storage tank connection circuit (low temperature side circuit, cold heat storage temperature adjustment means), heat medium circulates 50e Heat pipe (cold heat storage temperature adjustment means)
150 Cold storage tank independent circuit (low temperature side circuit, cold storage temperature control means)
152 Cold storage heat exchanger (cold storage heat exchanger)
51, 51d, 151 Low temperature side pump (pump)
55 Bypass antifreeze circuit (bypass heat medium circuit)
56 Bypass antifreeze on / off valve (Bypass heat medium opening / closing mechanism)
60 Intermediate heat medium connection circuit 160 Intermediate medium independent circuit 61 Intermediate pump 62a Connection antifreeze liquid passage (evaporation heat exchange section)
162a Independent antifreeze passage (evaporation heat exchange part)
71 Storage battery 71a Storage battery temperature sensor (temperature detection means)
72 Switching element storage portion 72a Switching element 72b Converter 79 Phase change layer (latent heat storage material, phase change medium)
90 Chilled water supply circuit 91 Chilled water heat exchanger (cold water piping)
92 Faucet 100, 100a, 100b, 100c, 100d, 100e, 100f, 200, 200a, 200b, 200c, 200e, 200f, 300, 300a, 300b, 300c, 400, 400a, 400b, 400c Hot water supply system S Solar panel (solar Photovoltaic panel)

JP 2010-145072 A

Claims (21)

Refrigerant circuits (20, 20a, 20b, 20c, 120, 120a) including a compressor (21), a radiator (22), an expansion mechanism (23), and an evaporator (24, 124) and circulating a refrigerant 120b, 120c) heat pump (2, 2a, 2b, 2c, 2d, 2e, 2f, 202, 202a, 202b, 202c, 202e, 202f, 302, 302a, 302b, 302c, 402, 402a, 402b, 402c) When,
A hot water storage tank (35) for storing hot water obtained by heating unheated water supplied below and heating the water below using the heat of the refrigerant flowing through the radiator;
A storage battery (71);
It has a temperature control interposition part (48), stores cold using the cold heat of the refrigerant flowing through the evaporator, and stores the stored cold heat in the storage battery (71) via the temperature control interposition part (48). Cold heat storage temperature adjusting means (6, 8, 8a, 8b, 50, 50d, 50e, 60, 150, 160) for adjusting the temperature of the storage battery by transmitting ,
Equipped with a,
The cold heat storage temperature adjusting means has a low temperature side circuit (50, 50d, 150) for sending and circulating a heat medium cooled by the stored cold heat to the temperature adjustment interposition part (48).
Hot water supply system (100, 100a, 100b, 100c, 100d , 100f, 200, 200a, 200b, 200c , 200f, 300, 300a, 300b, 300c, 400, 400a, 400b, 400c). A cold storage tank (6),
At least a part of the evaporator (24) is arranged to be able to exchange heat with the heat medium in the cold storage tank (6),
The low temperature side circuit has a cold heat storage tank connection circuit (50, 50d) configured such that the heat medium can be circulated between the temperature adjusting interposition part (48) and the cold heat storage tank (6). doing,
The hot-water supply system (100, 100a, 100b, 100c, 100d, 100f) according to claim 1 . The cold heat storage tank coupling circuit (50d) is provided in the middle of the bypass heat medium circuit (55) that bypasses the upstream side and the downstream side of the temperature adjustment interposition part (48) and the bypass heat medium circuit (55). A bypass heat medium opening and closing mechanism (56) and a pump (51d),
A state in which the heat medium is circulated between the temperature adjustment interposition part (48) and the cold storage tank (6), and the cold storage tank (6) and the bypass without being sent to the temperature adjustment intervention part (48). A control unit (7) for switching a state of circulating the heat medium between the heat medium circuits (55);
The hot water supply system (100d) according to claim 2 . Cold storage tank (6),
It has an evaporating heat exchanging part (62a) capable of exchanging heat with the heat of the refrigerant flowing through the evaporator (124), and the heat between the cold heat storage tank (6) and the evaporating heat exchanging part (62a). An intermediate heat medium coupling circuit (60) configured to allow the medium to circulate;
Further comprising
The low temperature side circuit has a cold heat storage tank connection circuit (50) configured to allow the heat medium to circulate between the temperature adjustment interposition part (48) and the cold heat storage tank (6). Yes,
The hot water supply system (200, 200a, 200b, 200c, 200f) according to claim 1 . It further comprises a cold heat storage tank (6) storing an intermediate medium inside,
At least a part of the evaporator (24) is arranged to be able to exchange heat with the intermediate medium in the cold storage tank (6),
The low temperature side circuit has a cold storage heat exchange section (152) capable of exchanging heat with the intermediate medium in the cold storage tank (6), and the temperature adjusting interposition section (48) and the cold storage heat heat. Having a cold storage tank independent circuit (150) configured to allow the heat medium to circulate between the exchange parts (152),
The hot water supply system (300, 300a, 300b, 300c) according to claim 1 . Cold storage tank (6),
It has an evaporating heat exchanging part (162a) capable of exchanging heat with the refrigerant flowing through the evaporator (124), and an intermediate medium between the cold heat storage tank (6) and the evaporating heat exchanging part (162a). An intermediate medium independent circuit (160) configured to be able to circulate,
Further comprising
The low temperature side circuit has a cold storage heat exchange section (152) capable of exchanging heat with the intermediate medium in the cold storage tank (6), and the temperature adjusting interposition section (48) and the cold storage heat heat. Having a cold storage tank independent circuit (150) configured to allow the heat medium to circulate between the exchange parts (152),
The hot water supply system (400, 400a, 400b, 400c) according to claim 1 . The heat medium is an antifreeze.
The hot water supply system according to any one of claims 1 to 6 . The intermediate medium is slurry ice,
The hot water supply system (300, 300a, 300b, 300c) according to claim 5 . Refrigerant circuits (20, 20a, 20b, 20c, 120, 120a) including a compressor (21), a radiator (22), an expansion mechanism (23), and an evaporator (24, 124) and circulating a refrigerant 120b, 120c) heat pump (2, 2a, 2b, 2c, 2d, 2e, 2f, 202, 202a, 202b, 202c, 202e, 202f, 302, 302a, 302b, 302c, 402, 402a, 402b, 402c) When,
A hot water storage tank (35) for storing hot water obtained by heating unheated water supplied below and heating the water below using the heat of the refrigerant flowing through the radiator;
A storage battery (71);
Cold heat storage temperature adjusting means (6, 8, 8a, 8b, 50, 50d, 50e, 60) that stores cold using the cold of the refrigerant flowing through the evaporator and adjusts the temperature of the storage battery using the stored cold. 150, 160),
A fan (26F),
Equipped with a,
The refrigerant circuit includes a heat exchanger (26) that exchanges heat between the refrigerant flowing inside and the air supplied from the fan (26F) between the evaporator (24, 124) and the expansion mechanism (23). In addition, have
Hot water supply system (100a, 200a, 300a, 400a) . The refrigerant circuit further includes an outdoor heat exchanger (26) and an intermediate expansion mechanism (27) for expanding the refrigerant passing between the evaporators (24, 124) and the outdoor heat exchanger (26). ing,
The hot water supply system (100b, 200b, 300b, 400b) according to claim 9 . The refrigerant circuit connects a portion between the compressor (21) and the evaporator (24, 124) and a portion between the intermediate expansion mechanism (27) and the outdoor heat exchanger (26). A circuit (28) and a bypass refrigerant opening / closing mechanism (28a) provided in the middle of the bypass refrigerant circuit (28),
A controller (7) for switching between a state in which the refrigerant is allowed to pass through the evaporator (24, 124) and a state in which the refrigerant is not allowed to pass through the evaporator (24, 124);
The hot water supply system (100c, 200c, 300c, 400c) according to claim 10 . Refrigerant circuits (20, 20a, 20b, 20c, 120, 120a) including a compressor (21), a radiator (22), an expansion mechanism (23), and an evaporator (24, 124) and circulating a refrigerant 120b, 120c) heat pump (2, 2a, 2b, 2c, 2d, 2e, 2f, 202, 202a, 202b, 202c, 202e, 202f, 302, 302a, 302b, 302c, 402, 402a, 402b, 402c) When,
A hot water storage tank (35) for storing hot water obtained by heating unheated water supplied below and heating the water below using the heat of the refrigerant flowing through the radiator;
A storage battery (71);
It has a temperature control interposition part (48), stores cold using the cold heat of the refrigerant flowing through the evaporator, and stores the stored cold heat in the storage battery (71) via the temperature control interposition part (48). Cold heat storage temperature adjusting means (6, 8, 8a, 8b, 50, 50d, 50e, 60, 150, 160) for adjusting the temperature of the storage battery by transmitting ,
High-temperature side circulation means (40) for circulating hot water stored above the hot water storage tank to return to the hot water storage tank after sending out the hot water to the temperature adjusting interposition part (48);
Equipped with a,
At least a part of the shape of the temperature control interposition part (48) has a shape along the outer shape of the storage battery (71).
Hot water supply system (100, 100a, 100b, 100c, 100d, 100e, 100f, 200, 200a, 200b, 200c, 200e, 200f, 300, 300a, 300b, 300c, 400, 400a, 400b, 400c). A phase change that is interposed between the cold energy storage temperature adjusting means and the storage battery (71) so as to be in thermal contact with each other, and changes phase at a predetermined temperature in order to prevent an abnormal temperature rise of the storage battery (71). Further comprising a medium (79),
The hot water supply system according to claim 12 . The phase change medium (79) is a latent heat storage material containing paraffin.
The hot water supply system according to claim 13 . In order to adjust the temperature of the storage battery (71), it further comprises a control unit (7) for controlling the temperature adjustment by the high temperature side circulation means (40) and the temperature adjustment by the cold heat storage temperature adjustment means.
The hot water supply system (600) according to any one of claims 12 to 14 . A hot water storage circuit (30) for heating the water below the hot water storage tank using the heat of the refrigerant flowing through the radiator, and storing hot water above the hot water storage tank;
Hot water storage circuit flow rate adjusting means (34) for adjusting the flow rate in the hot water storage circuit;
In the state where the hot water storage circuit flow rate adjusting means (34) is stopped, the use of stored heat at the time of stop has a control mode in which the temperature of the storage battery (71) is adjusted by the cold heat storage temperature adjustment means using the stored cold heat. A control unit (7);
The hot water supply system according to any one of claims 1 to 15 , further comprising: (100, 100a, 100b, 100c, 100d, 100e, 100f, 200, 200a, 200b, 200c, 200e, 200f, 300, 300a, 300b, 300c, 400, 400a, 400b, 400c). It further comprises temperature detection means (71a, 26a) capable of detecting the internal temperature of the storage battery or detecting the outdoor temperature,
The stop-time heat storage use control unit (7) is configured to store the cold energy stored when the temperature detected by the temperature detection unit is equal to or higher than a predetermined temperature in a state where the hot water storage circuit flow rate adjustment unit (34) is stopped. The temperature of the storage battery (71) is adjusted by the cold energy storage temperature adjusting means using
Hot water supply system according to claim 16 (100, 100a, 100b, 100c, 100d, 100e, 100f, 200, 200a, 200b, 200c, 200e, 200f, 300, 300a, 300b, 300c, 400, 400a, 400b, 400c ). The storage battery stores at least power used by the heat pump,
The hot water supply system according to any one of claims 1 to 17 (100, 100a, 100b, 100c, 100d, 100e, 100f, 200, 200a, 200b, 200c, 200e, 200f, 300, 300a, 300b, 300c, 400, 400a, 400b, 400c). The cold heat storage temperature adjusting means encloses a temperature adjusting medium cooled by the stored cold heat, and has a heat pipe (50e) for moving the heat of the temperature adjusting medium toward the storage battery (71). doing,
The hot water supply system (100e, 200e) according to any one of claims 9 to 15 . A solar power generation panel (S) that is installed so as to cover the hot water storage tank (35) and the storage battery (71), and receives sunlight to generate electric power (S),
The storage battery (71) is charged with electrical energy obtained by the photovoltaic power generation panel (S) generating power,
The hot water supply system according to any one of claims 1 to 19 . A solar power generation panel (S) that is installed so as to cover the hot water storage tank (35) and the storage battery (71), and receives sunlight to generate electric power (S),
For the driving of the heat pump, electric energy obtained by the solar power generation panel (S) generating electric power is used.
The hot water supply system according to any one of claims 1 to 19 .

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