WO2014002133A1 - Heat-pump type hot water supply/heating system - Google Patents

Abstract

Provided is a heat-pump type hot water supply system which is capable of switching between heat sources so as to minimize operating cost for a heat-pump type hot water supply/heating system provided with a heat pump device and a combustion heat source as heat sources. An operating heat source selection means (3) is configured as part of the function of a system controller (32), and through results obtained from comparing estimated values Chp and Cb for calculated operating costs, if the estimated value for the operating cost of the heat source that is stopped becomes smaller than a predetermined percentage of the estimated value for the operating cost of the heat source that is currently running, then makes a determination to stop the heat source that is currently running and switch to and start the operation of the heat source that is stopped.

Description

Heat pump hot water supply / heating system

The present invention relates to a heat pump hot water supply and heating system that heats water by exchanging heat from outside air by a heat pump refrigeration cycle by a heat exchanger and supplies the heated hot water to hot water supply or heating equipment.

FIG. 1 is a configuration diagram of a heat pump hot water supply and heating system according to Embodiment 1 of the present invention, as will be described later. A conventional heat pump hot water supply and heating system will be described with reference to FIG. A heat pump device 20 having a heat pump refrigeration cycle for circulating the refrigerant is connected to the water flow path 21 via a first heat exchanger 22 acting as a radiator. The first heat exchanger 22 may be housed inside the housing of the heat pump device 20. The water channel 21 is a channel through which hot water or antifreeze liquid heated by heat exchange with the refrigerant passing through the first heat exchanger 22 circulates. A tank unit 28 having a hot water storage tank 25 and a second heat exchanger 29, a radiator 26 and a floor heating device 27 are connected in parallel to the water flow path 21, and hot water or antifreeze liquid flowing out from the first heat exchanger 22 is connected thereto. Is switched to the tank unit 28 side or to the radiator 26 and floor heating equipment 27 side by the three-way valve 23. In addition, it is good also as a structure which switches a flow path using two two-way valves instead of this three-way valve 23. FIG.

Heat supply to the hot water supply water stored in the hot water storage tank 25 is performed by supplying hot water or antifreeze liquid heated by the first heat exchanger 22 via the second heat exchanger 29 provided inside or outside the hot water storage tank 25. This is done by exchanging heat with water. The radiator 26 is for heating by heat radiation, and the floor heating device 27 is for heating from the floor of a living space such as a house, and a plurality of units are installed in each room according to the configuration of the house or the like. Installed.

In the hot water supply water boiling operation in the hot water storage tank 25, the hot water or antifreeze liquid heated by the first heat exchanger 22 and the hot water supply water in the hot water storage tank 25 are heat-exchanged by the second heat exchanger 29, so When the water temperature rises and the detected value of the tank water temperature sensor 35 installed in the hot water storage tank 25 or on the wall surface reaches the boiling temperature set value, the boiling operation is finished. When hot water is used, hot water is discharged from the upper part of the hot water storage tank 25, mixed with water and supplied to the user as hot water at a temperature set by the user. On the other hand, new water is supplied from the lower part of the hot water storage tank 25. Accordingly, the interior of the hot water storage tank 25 is always full.

In the heating operation by the radiator 26 and the floor heating device 27, the detection value of one or a plurality of room temperature sensors 36 installed in the dwelling, or the detected hot water temperature sensor 33 or the return hot water temperature sensor 34 of the water flow path 21 is a predetermined value. Thus, the control of the hot water temperature by the heat pump device 20 is performed. This control of the hot water temperature is performed by changing the frequency of the compressor 20a in the heat pump device 20. Further, when the combustion heat source 40 is operated, the detected value of the room temperature sensor 36, or the warm water temperature sensor 33a of the water flow path 21 or the return warm water temperature sensor 34a becomes a predetermined value as in the case of the heat pump device 20. In addition, the hot water temperature is controlled by the combustion heat source 40. This combustion heat source 40 is mainly used when the heat pump device 20 fails or when heat supply by the heat pump device 20 cannot be sufficiently performed due to a decrease in the outside air temperature.

The above configuration and operation are an example of the configuration and operation of a conventional heat pump hot water supply and heating system.

In addition, as a conventional heat pump hot water supply and heating system, when operating a combustion heat source for the purpose of assisting when the heat supply of a heat pump device is insufficient, the outside air temperature is assumed as an environmental condition, and the hot water temperature is assumed as an operating condition. Combustion heat source with high heating capacity from the heat pump device when the heat heat supply data of the heat pump device is stored in the control device, and it is determined that the required heat amount cannot be supplied based on the current outside air temperature and hot water temperature during operation. In order to solve the shortage of heat supply by switching the operation, the method has been proposed (for example, see Patent Document 1).

JP 2011-12940 A (page 4, FIG. 1)

However, the conventional heat source switching method has been determined based on the lack of capacity of the heat pump device, and there is a problem that the operating cost is not taken into consideration.

In addition, since heat pump devices can supply three or more times the amount of electricity that is normally input, the operating cost of heat pump devices is usually lower than that of combustion heat sources. When the efficiency of the heat pump device is significantly reduced, there is a problem that the operation cost is higher in the heat pump device than in the combustion heat source. In addition, there is a problem that the operating cost per unit of heat supply may increase compared to when operating with a combustion heat source, such as the peak charge time period when an electricity price contract for each time period is concluded with an energy supply company. There was also a point.

The present invention has been made in order to solve the above-described problems. In a heat pump hot water supply / heating system including a heat pump device and a combustion heat source as a heat source, the heat source is switched so that predetermined determination information is reduced. It is an object of the present invention to provide a heat pump type hot water supply system that can be used.

A heat pump hot water supply / heating system according to the present invention includes a heat pump device having a refrigeration cycle circuit in which a compressor, a radiator, an expansion device, and an evaporator are connected by refrigerant piping, and the refrigerant flow path via the radiator. A water flow path through which water that exchanges heat with the flowing refrigerant flows, and a combustion heat source that burns fuel and heats the water that flows through the water flow path, the heat pump device and the combustion heat source being separated by the water flow path A heat pump type hot water supply and heating system connected in parallel, which detects and acquires an outside air temperature, and a hot water temperature measuring means that detects and acquires a hot water temperature that is the temperature of water flowing through the water flow path. Load amount calculating means for calculating the load amount of the heat pump device and the load amount of the combustion heat source, the outside air temperature, the hot water temperature, the heat pump Heat pump characteristic data storage means that stores heat pump characteristic data that is data relating to the association between the load amount of the apparatus and COP, and a combustion type that stores combustion type heat source characteristic data that is data related to the association between the load quantity and efficiency of the combustion type heat source A heat source characteristic data storage means; an energy unit price acquisition means for storing an electricity bill unit price and a fuel charge unit price; the outside air temperature obtained by the outside air temperature measurement means; the hot water temperature obtained by the hot water temperature measurement means; Estimating the COP of the heat pump device based on the load amount of the heat pump device calculated by the load amount calculation unit and the heat pump characteristic data stored in the heat pump characteristic data storage unit, and the combustion heat source The combustion type stored in the characteristic data storage means Heat source performance estimation means for estimating the efficiency of the combustion heat source based on source characteristic data, the COP estimated by the heat source performance estimation means, the load amount of the heat pump device, and the energy unit price acquisition means The operation cost of the heat pump device is estimated based on the unit price of the electricity price, and the efficiency estimated by the heat source performance estimation unit, the load amount of the combustion heat source, and the energy unit price acquisition unit Determination information estimation means for estimating the operating cost of the combustion heat source based on the stored fuel unit price, and the operation cost estimated by the determination information estimation means as the determination information, the heat pump being the determination information Compare the operating cost of the device with the operating cost of the combustion heat source, and run the one with the lower operating cost. Operation heat source selection means for selecting as a heat source to be converted, and heat source switching control means for switching operation to the heat source selected by the operation heat source selection means and stopping the other heat source.

According to the present invention, the operation cost of the heat pump device and the combustion heat source that are heat sources is estimated, and the estimated operation cost is switched to the heat source with a low operation cost that is the determination information as the determination information for switching the heat source. Therefore, for example, when compared with the case where the heat pump device is always operated independently, the operation cost can be surely reduced.

It is a block diagram of the heat pump type hot-water supply heating system which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the various means for implementing heat source switching of the heat pump type hot-water supply heating system which concerns on Embodiment 1 of this invention. It is a flowchart which shows the basic operation | movement of the heat pump type hot-water supply heating system which concerns on Embodiment 1 of this invention. It is the figure which showed the correlation with the external temperature stored in the heat pump characteristic data storage means 8 of the heat pump type hot-water supply heating system which concerns on Embodiment 1 of this invention, warm water temperature, capability, a load factor, and a COP with the graph and the table. . It is a figure which shows the procedure which estimates COP of the heat pump apparatus 20 in the heat pump type hot-water supply heating system which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the various means for implementing heat source switching of the heat pump type hot-water supply heating system which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of the various means for implementing heat source switching of the heat pump type hot-water supply heating system which concerns on Embodiment 3 of this invention. It is a figure which shows the state of the operating cost at the time of switching to the single operation of the heat pump apparatus 20 of the heat pump type hot water supply and heating system which concerns on Embodiment 3 of this invention, simultaneous operation, and the single operation of the combustion type heat source 40. FIG. It is a block diagram of the system controller 32 of the heat pump type hot-water supply heating system which concerns on Embodiment 4 of this invention. It is the figure which showed the correlation of the load amount memorize | stored in the combustion type heat source memory | storage means 9 of the heat pump type hot-water supply heating system which concerns on Embodiment 1 of this invention, and a table with a table.

Embodiment 1 FIG.
(Configuration of heat pump hot water supply / heating system)
FIG. 1 is a configuration diagram of a heat pump hot water supply / heating system according to Embodiment 1 of the present invention.

As shown in FIG. 1, the heat pump hot water supply and heating system according to the present embodiment includes a heat pump device 20, a first heat exchanger 22, a combustion heat source 40, a tank unit 28, a radiator 26, and a floor heating device 27. ing.

The heat pump device 20 houses a compressor 20a, an expansion device 20b, and an evaporator 20c. The first heat exchanger 22 and the first heat exchanger 22 are connected by a refrigerant pipe, and a refrigeration cycle circuit in which the refrigerant circulates is configured.

The compressor 20a can change the operating frequency by an inverter and compresses and discharges the gas refrigerant.

The first heat exchanger 22 acts as a radiator, and exchanges heat between the high-temperature and high-pressure refrigerant discharged from the compressor 20a with water or antifreeze liquid (hereinafter simply referred to as “water”) flowing through a water passage 21 described later. Then, heat is dissipated from the refrigerant to the water.
As shown in FIG. 1, the first heat exchanger 22 is assumed to be installed outside the heat pump device 20, but may be housed inside the heat pump device 20. Then, the 1st heat exchanger 22 is demonstrated as what is a part of component of the heat pump apparatus 20. FIG.

The expansion device 20b is configured by an electronic expansion valve or the like, and can adjust the refrigerant flow rate.

The evaporator 20c performs heat exchange between the air and the refrigerant, has a variable capacity fan, and evaporates the refrigerant.

Moreover, as shown in FIG. 1, the heat pump device 20 and the first heat exchanger 22 that are heat supply sources for water, and the combustion heat source 40 are connected in parallel by a water pipe, and further, A tank unit 28, a radiator 26, and a floor heating device 27, which are supply destinations, are also connected in parallel by water pipes, and a water flow path 21 is formed. Among these, the water flow path 21 through which the water flowing in and out from the first heat exchanger 22 is provided with a circulation pump 24, and the water is circulated by the circulation pump 24. The water passage 21 through which the water flowing in and out from the combustion heat source 40 circulates is provided with a circulation pump 24a, and water is circulated by the circulation pump 24a. Further, the water flow path 21 is provided with a three-way valve 23, and flows out of the hot water or the warmed antifreeze liquid (hereinafter simply referred to as “hot water”) flowing out from the first heat exchanger 22 or from the combustion heat source 40. The heated water is switched to the tank unit 28 side or to the radiator 26 and the floor heating device 27 side by the three-way valve 23.
In addition, it is good also as a structure which switches a flow path using two two-way valves instead of this three-way valve 23. FIG.

The combustion heat source 40 is a hot water heater such as a boiler that burns fuel and supplies heat to the hot water.

The tank unit 28 includes a hot water storage tank 25 and a second heat exchanger 29.

The hot water storage tank 25 stores hot water supply water. When hot water is used, hot water as hot water supply water is discharged from the upper part thereof, and new hot water supply water is supplied from the lower part thereof.

The second heat exchanger 29 is connected to the water flow path 21 and performs heat exchange between the hot water flowing out from the first heat exchanger 22 and the hot water supply water stored in the hot water storage tank 25. is there. That is, the hot water stored in the hot water storage tank 25 is heated by the hot water flowing out from the first heat exchanger 22.

The radiator 26 and the floor heating device 27 are connected to the water flow path 21, and the hot water flowing out from the first heat exchanger 22 flows in and heats each. The radiator 26 is for heating by heat radiation, and the floor heating device 27 is for heating from the floor of a living space such as a house, and a plurality of units are installed in each room according to the configuration of the house or the like. Installed.

Further, as shown in FIG. 1, the heat pump hot water supply / heating system according to the present embodiment includes a heat source controller 31 and a system controller 32 (hot water supply / heating system control device).

The heat source controller 31 is housed in the heat pump device 20 and controls the operation of the fans of the compressor 20a, the expansion device 20b, and the evaporator 20c.

The system controller 32 is housed in the tank unit 28, and starts and stops the heat source controller 31, outputs an operation frequency command for the compressor 20a, starts and stops the circulation pumps 24 and 24a, and outputs a rotation speed command. The flow path switching command of the three-way valve 23 is output, and the combustion heat source 40 is started and stopped.

As shown in FIG. 1, the system controller 32 is stored in the tank unit 28, but is not limited to this, and may be stored in the heat pump device 20. The system controller 32 alone may be provided as a separate part.
In addition, as shown in FIG. 1, the heat source controller 31 and the system controller 32 are configured as separate controllers. However, the controller is not limited to this, and is configured as a single controller having both functions. It may be installed inside the heat pump device 20 or inside the tank unit 28.

Further, as shown in FIG. 1, the heat pump hot water supply / heating system according to the present embodiment includes an outside air temperature sensor 30, an outgoing hot water temperature sensor 33, 33 a, and a return sensor as sensors for grasping the operation state of the system. Hot water temperature sensors 34, 34 a, one or more tank water temperature sensors 35, a room temperature sensor 36, flow rate sensors 37, 37 a, and a hot water temperature sensor 38 are provided, and information detected by each sensor is transmitted to the system controller 32. Is done.

The outside air temperature sensor 30 detects the outside air temperature around the heat pump device 20.
The outgoing hot water temperature sensor 33 detects the temperature of the hot water flowing out from the first heat exchanger 22. The outgoing hot water temperature sensor 33a detects the temperature of hot water flowing out from the combustion heat source 40.
The return hot water temperature sensor 34 detects the temperature of the hot water flowing into the first heat exchanger 22. The return hot water temperature sensor 34 a detects the temperature of the hot water flowing into the combustion heat source 40.
The tank water temperature sensor 35 is provided at at least one location in the vertical direction of the hot water storage tank 25 and detects the temperature of hot water stored in the hot water storage tank 25.
The room temperature sensor 36 detects the temperature in a room such as a living space where the radiator 26 is installed.
The flow rate sensor 37 is arranged to detect the flow rate of the hot water flowing into the first heat exchanger 22, but may detect the flow rate of the hot water flowing out from the first heat exchanger 22. The flow rate sensor 37 a is arranged to detect the flow rate of hot water flowing into the combustion heat source 40, but may detect the flow rate of hot water flowing out from the combustion heat source 40.
The hot water temperature sensor 38 is a water flow path 21 in which the hot water flowing out from the first heat exchanger 22 and the hot water flowing out from the combustion heat source 40 are merged because the heat pump device 20 and the combustion heat source 40 are operating simultaneously. The temperature of the hot water at that location is detected.
Hereinafter, the temperature of hot water detected by each of the above sensors is simply referred to as “warm water temperature”.

Note that it is not always necessary to install all of these sensors, but at least the outgoing hot water temperature sensors 33 and 33a are indispensable.

FIG. 2 is a diagram showing a configuration of various means for performing heat source switching in the heat pump hot water supply / room heating system according to Embodiment 1 of the present invention.
As shown in FIG. 2, the heat pump hot water supply and heating system according to the present embodiment includes an operating heat source determination unit 11 and a heat source switching control unit 4. Among them, the operating heat source determination means 11 is an embodiment of the heat source performance estimation means 1, the determination information estimation means for estimating determination information used for heat source switching determination, the operation cost estimation means 2, the operation heat source selection means 3, and the load amount calculation. It comprises means 5, outside air temperature acquisition means 6, hot water temperature acquisition means 7, heat pump characteristic data storage means 8, combustion type heat source characteristic data storage means 9 and energy unit price acquisition means 10. The heat source switching operation between the heat pump device 20 and the combustion heat source 40 by each means will be described later. Each of these means may be configured such that each function is realized by hardware or software in the system controller 32.

The outside air temperature acquisition means 6 and the outside air temperature sensor 30 correspond to the “outside air temperature measurement means” of the present invention, and the hot water temperature acquisition means 7 and the forward hot water temperature sensors 33 and 33a or the return hot water temperature sensors 34 and 34a. Corresponds to “warm water temperature measuring means” of the present invention.
The operating cost estimation means 2 corresponds to the “determination information estimation means” of the present invention.

(Basic operation of heat pump hot water supply and heating system)
FIG. 3 is a flowchart showing the basic operation of the heat pump hot water supply / heating system according to Embodiment 1 of the present invention. Hereinafter, the basic operation of the heat pump hot water supply and heating system will be described with reference to FIG.

The user can perform the heating operation of the hot water storage tank 25 in the tank unit 28 or the radiator 26 or the floor heating device by an operation interface of the system controller 32 provided in the tank unit 28 or a remote controller installed in the air-conditioning target space or the like. “Operation command” for manually setting the start or stop of the heating operation by 27, the heating operation of the hot water storage tank 25, or the time at which the automatic start or automatic stop of the heating operation by the radiator 26 or the floor heating device 27 is permitted or prohibited Can be set, or “temperature” required for determining the operating conditions of the heating operation of the hot water storage tank 25 or the heating operation by the radiator 26 or the floor heating device 27. When a user sets a temperature necessary for determination of an operation command, an operation schedule, or an operation condition with a remote controller, the setting information is transmitted to the system controller 32 by wireless or wired communication.

(S1: Initialization process)
When the heat pump hot water supply / heating system is activated by the operation of the remote controller or the like by the user, first, initialization processing in the system controller 32 is performed. In this initialization processing, processing such as activation of a control program and reading of setting information stored in a storage device (not shown) is performed. Then, the process proceeds to step S2.

(S2: Control cycle determination process)
When the initialization process S1 is completed, the system controller 32 counts the time with a timer and determines whether or not the accumulated time has reached the time of the control cycle. When the control period is reached, the process proceeds to S3 and subsequent steps. The accumulated time is reset when the process moves to S3. If the accumulated time has not reached the time of the control cycle, the determination process of S2 is repeated until the time of the control cycle is reached.

(S3: Input processing)
The system controller 32 acquires detection information from various sensors, operation signals from a remote controller and the operation state of the heat pump device 20. The operating state of the heat pump device 20 is acquired from the heat source device controller 31. Then, the process proceeds to step S4.

(S4: System stop determination process)
When the system controller 32 is operated to stop the system by the operation of the remote controller or the like by the user, the system controller 32 proceeds to step S9 in order to stop the system based on the operation signal. Otherwise, the process proceeds to step S5.

(S5: Abnormality detection process)
The system controller 32 determines whether there is an abnormality in the detection information from each sensor acquired in step S3. For example, when an abnormality is detected such that the temperature of the hot water detected by the return hot water temperature sensor 34 is abnormally high, the process proceeds to step S10. If there is no abnormality, the process proceeds to step S6.

(S6: Operation mode determination process)
The system controller 32 determines the operation mode of the heat pump hot water supply and heating system based on the information acquired from each sensor acquired in step S3 and the information set by the user with the remote controller, and the tank heating operation, the heating operation, and the stop Each operation state such as a defrosting operation of the heat pump device 20, a Legionella sterilization operation of the tank, and an antifreezing operation is determined. Then, the process proceeds to step S7.

(S7: Operating heat source determination process)
As will be described later, the system controller 32 determines whether to switch to the heat pump device 20 or the combustion heat source 40 by the processing by the heat source performance estimation unit 1, the operation cost estimation unit 2, and the operation heat source selection unit 3. Do.

(S8: Device control process)
As will be described later, the system controller 32 performs a heat source switching operation between the heat pump device 20 and the combustion heat source 40 based on the determination result of step S7 by the processing by the heat source switching control unit 4. And the output of each apparatus is controlled according to the detection information from the sensor acquired by step S3, and the target value of a control object. In the case of the heat pump device 20, for example, the outgoing hot water temperature 33, the tank water temperature 35 or the room temperature 36 is controlled, and the load amount is controlled by changing the compressor frequency of the heat pump device 20 so that the sensor measurement value becomes the control target value. . In the case of the combustion-type heat source 40, for example, the temperature of the incoming hot water, the temperature of the tank water, or the room temperature is controlled, and the amount of fuel input is changed to control the load so that the sensor measurement value becomes the control target value. In the case of the circulation pump 24 or 24a, for example, the room temperature or the tank water temperature is controlled, and the operation is started if the sensor measurement value is lower than a predetermined temperature with respect to the control target value, and the operation is stopped if the sensor measurement value is higher than the predetermined temperature. In the case of the three-way valve 23, when the operation mode is a tank boiling operation and the tank water temperature sensor 35 falls below a predetermined lower limit temperature, switching from the heating side to the tank side and if the tank water temperature rises to the predetermined upper limit temperature, Switch from tank side to heating side.

(S9: System stop)
After stopping the operation of each device, the remote controller, the heat source controller 31, and the system controller 32 are stopped.

(S10: Device control processing (when abnormal))
When it is determined that there is an abnormality in the abnormality detection process in step S5, the contents of the abnormality are displayed on the remote controller, and processing according to the contents of the abnormality, such as stopping the operation of the device related to the abnormality, is performed. The system controller 32 may be connected to an external communication network to contact a maintenance or support company.

(Heat source switching operation between the heat pump device 20 and the combustion heat source 40)
FIG. 4 is a graph and table showing the correlation between the outside air temperature, hot water temperature, capacity, load factor, and COP stored in the heat pump characteristic data storage means 8 of the heat pump hot water supply and heating system according to Embodiment 1 of the present invention. FIG. 5 is a diagram showing a procedure for estimating the COP of the heat pump device 20 in the heat pump hot water supply and heating system. Here, the capacity is the amount of heat supplied (kW) of the heat pump device 20, and represents the amount of heat supplied to the heating and tank boiling loads. Hereinafter, the capacity, supply heat amount and load amount are treated as the same.
FIG. 10 is a table showing the correlation between the load amount of the combustion heat source and the efficiency stored in the combustion heat source characteristic data storage means 9 in a table. Here, the load amount is equal to the amount of heat that the combustion heat source 40 can supply to the hot water in the water flow path 21. Moreover, efficiency shall show the ratio of the calorie | heat amount which can be supplied to the warm water of the water flow path 21 among the calorie | heat amount which the injected fuel has. The data stored in the combustion-type heat source characteristic data storage means 9 is not limited to this, and the load factor representing the ratio of each load amount to the outside air temperature, hot water temperature, load amount, and load amount in rated operation. Any one of the above data and the efficiency data may be associated with each other. Moreover, you may give a rated load amount and efficiency as a fixed value.
Hereinafter, the heat source switching operation between the heat pump device 20 and the combustion heat source 40 will be described with reference to FIGS. 1, 2, 4, 5, and 10.

The outside air temperature acquisition means 6 corresponds to an input interface for inputting external information in the system controller 32, and acquires the outside air temperature detected by the outside air temperature sensor 30 for each control cycle described in FIG.

The hot water temperature acquisition means 7 corresponds to an input interface for inputting external information in the system controller 32, and the temperature of the hot water detected by the outgoing hot water temperature sensors 33 and 33a (hereinafter referred to as the outgoing hot water temperature) and the return hot water temperature. The temperature of hot water detected by the sensors 34 and 34a (hereinafter referred to as return hot water temperature) is acquired. Here, when the heat pump device 20 or the combustion-type heat source 40 has just started from the stopped state, the forward hot water temperature and the return hot water temperature are performing the defrosting operation of the heat exchanger by the cooling function of the heat pump device 20. In such a case, and when the circulation pump 24 or the circulation pump 24a is started and the operation for preventing freezing of the water flow path 21 is performed, the temperature is lower than the original temperature. Furthermore, the outgoing hot water temperature and the return hot water temperature are temporarily higher than the temperatures to be supplied when the boiling operation of the hot water storage tank 25 is finished and switched to the heating operation. Therefore, after the heat pump device 20 or the combustion heat source 40 is started from the stopped state, the heat pump device 20 is switched from the defrosting operation to the heating operation or the boiling operation, and then the heat pump device 20 or the combustion heat source 40 is prevented from freezing. After switching from the operation for heating to the heating operation or the boiling operation, and after the heat pump device 20 or the combustion heat source 40 is switched from the heating operation to the heating operation, the heat pump device 20 and the combustion type only for a predetermined time. It is assumed that the operation heat source determination process described in FIG. 3 centering on the heat source switching operation with the heat source 40 is not performed, and the heat source that is operating at that time is continuously operated. Thus, in the heat source switching operation between the heat pump device 20 and the combustion heat source 40, it is possible to prevent processing using temperature information that is not the original temperature to be acquired by the hot water temperature acquisition means 7.

Note that it is not necessary to acquire all of the above-mentioned forward hot water temperature and return hot water temperature unless there is a need to use for calculating the load amount, COP of the heat pump device 20 or the efficiency of the combustion heat source 40 described later. While the heat pump device 20 is in operation, the value of the hot water temperature during operation is used for the calculation of COP, which will be described later. In addition, you may use the average value of a predetermined period for the value of this warm water temperature. On the other hand, the combustion type heat source 40 is stopped, and the return warm water temperature detected by the return warm water temperature 33a and the return warm water temperature detected by the return warm water temperature sensor 34a are lowered. If the temperature is used, the hot water temperature immediately before the combustion type heat source 40 stops operation may be used, and the relational data between the outside air temperature and the hot water temperature is stored in the combustion type heat source characteristic data storage means 9 described later. It is good also as what presumes warm water temperature from the relationship data.

Similarly, while the combustion heat source 40 is in operation, if the value of the hot water temperature is used for calculation of a load factor described later, the value of the hot water temperature during operation is used. On the other hand, since the heat pump device 20 is stopped and the return hot water temperature detected by the return hot water temperature sensor 33 and the return hot water temperature detected by the return hot water temperature sensor 34 are decreased, the calculation of COP described later is performed. Instead of using the data detected by the incoming hot water temperature sensor 33 or the return hot water temperature sensor 34, for example, the hot water temperature immediately before the heat pump device 20 stops operating may be used. Moreover, it is good also as what presumes warm water temperature from the relationship data as the thing which has memorize | stored the relationship data of external temperature and warm water temperature in the heat pump characteristic data storage means 8 mentioned later.

The energy unit price acquisition means 10 stores data on a unit price of electricity and a unit price of fuel per unit input energy [kWh]. The electricity unit price and the fuel unit price may be changed according to the time of day, day of the week, weekday or holiday, month, season, or usage amount. In addition, when the unit price of the charge changes depending on the day or time, the energy unit price acquisition means 10 stores calendar information such as time or date, and the electric charge unit price or fuel charge unit price is associated with the calendar information. As a thing, it is good also as what can obtain | require the present electricity rate unit price or fuel rate unit price based on the association. In addition, when the unit price of charges changes depending on the usage, each usage can be acquired as if it were equipped with a sensor that measures power usage or fuel usage, and based on the acquired usage data, The unit price of fuel or the unit price of fuel may be obtained.

The load amount calculation means 5 is configured as a part of the function of the system controller 32, and calculates the heating load amount or hot water supply load amount during operation. First, calculation of the heating load amount will be described.

When the heating operation is performed by the heat pump device 20 or the combustion heat source 40, QL is the load amount [kW] in the heating operation, Tr is the set room temperature [° C.], Qmax is the maximum assumed heating load value [kW], Assuming that Tad is the outside air temperature estimated value [° C.] at the maximum heating load and T is the current outside air temperature [° C.], the load amount QL [kW] is calculated by the load amount calculation means 5 according to the following equation (1). It can be calculated.

QL = Qmax−Qmax / (Tr−Tad) × (T−Tad) (1)

Here, the estimated outside air temperature value Tad [° C.] and the estimated maximum heating load value Qmax [kW], which are the maximum heating load, are set values, and are based on the local climate or the heat insulation performance of the house, It shall be set assuming the maximum heating load at the time of temperature. For the current outside air temperature T [° C.], the one detected by the outside air temperature sensor 30 is used.

Further, a method for calculating the load amount QL [kW] by another method when the heating operation is performed by the heat pump device 20 or the combustion heat source 40 will be described below. Tout is the warm water temperature [K], Tin is the return warm water temperature [K], Fw is the flow rate of warm water (hereinafter simply referred to as “warm water flow rate”) [L / s], ρ is the density of water [kg / L], When Cp is the specific heat of water [kJ / (kg · K)], the load amount QL [kW] can be calculated by the load amount calculation means 5 according to the following equation (2).

QL = ρ ・ Cp ・ Fw ・ (Tout-Tin) (2)

Here, when the heating operation is performed by the heat pump device 20, the incoming hot water temperature Tout [K] is detected by the outgoing hot water temperature sensor 33, and the return hot water temperature Tin [K] is detected by the return hot water temperature sensor 34. And the hot water flow rate Fw [L / s] detected by the flow rate sensor 37 may be used. When the heating operation is performed by the combustion heat source 40, the forward hot water temperature Tout [K] is detected by the forward hot water temperature sensor 33a, and the return hot water temperature Tin [K] is detected by the return hot water temperature sensor 34a. What was detected and what was detected by flow sensor 37a should just be used for warm water flow Fw [L / s], respectively.

Further, when the heating operation is performed by the heat pump device 20, there is also a method for estimating the load amount QL [kW] from the operation frequency of the compressor 20a. fs is the maximum frequency [Hz] of the compressor 20a in the operation state at the current outside air temperature and hot water temperature, Qs is the heat supply amount [kW] during operation at the maximum frequency of the compressor 20a, and fn is the current compressor 20a. If the operating frequency [Hz] is, the load amount QL [kW] can be calculated by the load amount calculation means 5 by the following equation (3).

QL = Qs × fn / fs (3)

When this equation (3) is used, the heat pump characteristic data storage means 8 needs to store the association between the outside air temperature and the hot water temperature, the maximum frequency of the compressor 20a, and the amount of heat supplied at that time. Further, in the case of the combustion type heat source 40, since the above formula (3) cannot be used, the formula (1) or the formula (2) is used.
In addition, when calculating load amount QL [kW] using said Formula (3), when a load factor (it mentions later) changes with outside air temperature and warm water temperature, it is stored in heat pump characteristic data storage means 8. The association between the amount of heat supplied and the load factor must also be stored.

Next, calculation of the hot water supply load amount by the load amount calculation means 5 will be described.
This supply load amount is calculated by the heat amount [kW] per unit time necessary for the boiling operation of the hot water storage tank 25. When the boiling operation of the hot water storage tank 25 is performed, the operation is performed with the rated capacity by the heat pump device 20 or the combustion heat source 40 in order to perform the boiling in a short time. Therefore, the load amount QL [kW] in the boiling operation is estimated to be equal to the rated supply heat amount [kW] per unit time at the current outside air temperature and hot water temperature. Here, the heat pump characteristic data storage unit 8 stores the association between the outside air temperature and the hot water temperature and the rated supply heat amount of the heat pump device 20, and the combustion heat source characteristic data storage unit 9 stores the outside air temperature and the hot water. The association between the temperature and the rated supply heat amount of the combustion heat source 40 is stored. Therefore, when the load amount calculating means 5 estimates the hot water supply load amount [kW] when the heating operation is performed by the heat pump device 20, the outside air temperature and the forward hot water temperature sensor detected by the outside air temperature sensor 30 are used. Based on the hot water temperature detected by the heat pump 33 and the association stored in the heat pump characteristic data storage means 8, the rated supply heat amount [kW] by the heat pump device 20 is obtained, and this may be set as the load amount QL [kW]. . When the load amount calculation means 5 estimates the hot water supply load amount [kW] when the boiling operation is performed by the combustion heat source 40, the outside air temperature and the forward hot water temperature detected by the outside air temperature sensor 30. Based on the hot water temperature detected by the sensor 33a and the association stored in the combustion-type heat source characteristic data storage means 9, the rated supply amount [kW] by the combustion-type heat source 40 is obtained, and this is obtained as the load amount QL [kW]. And it is sufficient. It should be noted that the combustion heat source characteristic data storage means 9 has a rated supply heat quantity [kW] as a fixed value, and the data may be always used.

The heat pump characteristic data storage means 8 is a storage device such as a memory arranged in the system controller 32. At least the outside air temperature, the hot water temperature, the capacity [kW] of the heat pump device 20, the load factor, and the COP ( Data related to the association with Coefficient of Performance). Here, a load factor shall show the ratio of the calorie | heat amount which can be supplied to the warm water of the water flow path 21 among the calorie | heat amount which a heat source (heat pump apparatus 20 and the combustion type heat source 40) can supply by rated operation. Moreover, it is good also as another name or index data which can compare the magnitude of a load factor like the capability step N, for example. An example of the correlation of these data is shown in FIG.

The combustion heat source characteristic data storage means 9 is a storage device such as a memory disposed in the system controller 32 and stores at least efficiency data indicating the ratio of the supplied heat quantity [kW] to the heat quantity [kW] of the input fuel. is doing. Further, the combustion heat source characteristic data storage means 9 stores at least one data among the outside air temperature, the hot water temperature, or the load factor and data relating to the efficiency.

The heat source performance estimation unit 1 is configured as a part of the function of the system controller 32, and acquires the load amount QL [kW] obtained by the load amount calculation unit 5, the outside air temperature and the hot water temperature obtained by the outside air temperature obtaining unit 6. Based on the hot water temperature acquired by the means 7 and the data stored in the heat pump characteristic data storage means 8 (hereinafter referred to as “heat pump characteristic data”), the COP of the heat pump device 20 is calculated and estimated. Hereinafter, a procedure for estimating the COP will be described with reference to FIG.

First, the heat source performance estimation means 1 stores the current hot water temperature (current hot water temperature Twn) acquired by the hot water temperature acquisition means 7 in the heat pump characteristic data storage means 8 so that it falls within the range of the two hot water temperature data. The hot water temperatures Tw1 and Tw2 are selected and extracted from the stored heat pump characteristic data.

Next, the heat source performance estimation unit 1 sets the heat pump so that the current outside temperature (current outside temperature Tan) acquired by the outside temperature acquisition unit 6 falls within the range of the two outside temperature data for the hot water temperature Tw1. The outside air temperatures Ta1 and Ta2 are selected and extracted from the characteristic data. Then, based on the data of each load factor (load factors A and B in FIG. 5) corresponding to the hot water temperature Tw1, linear interpolation is performed on the data of the ability corresponding to the outside air temperatures Ta1 and Ta2, and the hot water temperature Tw1 and The capacity Q1 at the load factor A corresponding to the current outside air temperature Tan and the capacity Q2 at the load factor B are calculated by the following equations (4) and (5), respectively. Here, QA is data of capacity [kW] at the load factor A, and QB is data of capacity [kW] at the load factor B.

Q1 [Tw1, Tan] = QA [Tw1, Ta1] + (QA [Tw1, Ta2] −QA [Tw1, Ta1]) / (Ta2−Ta1) × (Tan−Ta1) (4)
Q2 [Tw1, Tan] = QB [Tw1, Ta1] + (QB [Tw1, Ta2] −QB [Tw1, Ta1]) / (Ta2−Ta1) × (Tan−Ta1) (5)

Next, the heat source performance estimating means 1 includes the current load amount QL obtained by the load amount calculating means 5 between the two points of the abilities Q1 and Q2 obtained by the above equations (4) and (5). Based on the capacities Q1 and Q2 at the load factors A and B, the ratio R: (1-R) between Q1-QL and QL-Q2 (when Q2 <QL <Q1) is obtained by the following equation (6) (R <1).

R [Tw1, Tan] = (Q1 [Tw1, Tan] -QL) / (Q1 [Tw1, Tan] -Q2 [Tw1, Tan]) (6)

Next, the heat source performance estimating means 1 linearly interpolates the COP data corresponding to the outside air temperatures Ta1 and Ta2 based on the data of the load factors A and B corresponding to the hot water temperature Tw1, and the hot water temperature Tw1 and the current outside air temperature. COP1 that is the value of COP at the load factor A corresponding to Tan and COP2 that is the value of COP at the load factor B are calculated by the following equations (7) and (8), respectively. Here, COP_A is COP data at the load factor A, and COP_B is COP data at the load factor B.

COP1 [Tw1, Tan] = COP_A [Tw1, Ta1] + (COP_A [Tw1, Ta2] −COP_A [Tw1, Ta1]) / (Ta2−Ta1) × (Tan−Ta1) (7)
COP2 [Tw1, Tan] = COP_B [Tw1, Ta1] + (COP_B [Tw1, Ta2] −COP_B [Tw1, Ta1]) / (Ta2−Ta1) × (Tan−Ta1) (8)

Next, the heat source performance estimating means 1 uses the values of COP1 and COP2 obtained by the above formulas (7) and (8) and the value of R obtained by the above formula (6) as follows. COPw1, which is the value of COP in the current outside air temperature Tan, the hot water temperature Tw1, and the current load amount QL, is calculated by Expression (9). FIG. 5 shows an example in which the load factor B having a lower capability has a higher COP than the load factor A.

COPw1 [Tw1, Tan] = COP1 [Tw1, Tan] + R [Tw1, Tan] × (COP2 [Tw1, Tan] −COP1 [Tw1, Tan]) (9)

The heat source performance estimating means 1 performs the same calculation for the hot water temperature Tw2 by using the equations (4) to (9), and calculates the current outside air temperature Tan, the hot water temperature Tw2, and the COP value at the current load amount QL. A certain COPw2 is calculated.

(COPw1-COPhp) :( COPhp-COPw2) (Tw1 <Twn <Tw2 as described above) (COPw1-COPhp): (COPw1-COPhp): the difference between COPhp, which is the value of COP at the current hot water temperature Twn, and the difference between COPw1 and COPw2. ) Becomes (Twn−Tw1) :( Tw2−Twn) becomes the COP of the heat pump device at the current outside air temperature Tan, the current hot water temperature Twn, and the current load amount QL. And the heat source performance estimation means 1 calculates this COPhp by the following formula (10).

COPhp [Twn, Tan] = COPw1 [Tw1, Tan]-(COPw1 [Tw1, Tan] -COPw2 [Tw2, Tan]) × (Twn-Tw1) / (Tw2-Tw1) (10)

As the current hot water temperature Twn and the current outside air temperature Tan, the current detection values of the hot water temperature sensor 33 and the outside air temperature sensor 30 or an average value for a predetermined period are used if the heat pump device is in operation, but the combustion heat source is operated. In this case, since the flow of the water flow path on the heat pump device side is stopped and the measured value of the hot water temperature sensor 33 does not represent the temperature during operation, the operation is switched from the heat pump device to the combustion heat source before. Alternatively, the hot water temperature immediately before or the control target value of the hot water temperature may be used.

Furthermore, the heat source performance estimating means 1 obtains the efficiency Eff of the combustion type heat source 40. If the efficiency of the combustion type heat source 40 is stored as a fixed value in the data stored in the combustion type heat source characteristic data storage means 9 (hereinafter referred to as “combustion type heat source characteristic data”), the fixed value May be always used as the efficiency Eff. Moreover, what is necessary is just to obtain | require the thing linked | related as efficiency Eff from the present measurement value, when efficiency is linked | related with external temperature, warm water temperature, or a load factor. If the current measured value does not match the value of the data stored in the combustion heat source data storage means 9, the efficiency of the current measured value may be obtained by linear approximation from the peripheral value data. As in the case of the heat pump device, when the combustion type heat source is stopped, the hot water temperature immediately before the operation is switched from the combustion type heat source to the heat pump device or the control target value of the hot water temperature may be used.

The operating cost estimation means 2 is configured as a part of the function of the system controller 32, COPhp which is the COP value of the heat pump device 20 estimated by the heat source performance estimation means 1, the efficiency Eff of the combustion heat source 40, and The estimated operating cost of the heat pump device 20 and the combustion heat source 40 is calculated by the following formula (11) and formula (12) using the current unit price of electricity and the unit price of fuel determined by the energy unit price acquisition means 10. To do. Here, Chp is an estimated operating cost value of the heat pump device 20, Cb is an estimated operating cost value of the combustion heat source 40, Php is a unit price of electricity per kWh, and Pb is a unit price of fuel per kWh. Although the unit of the load amount QL is kW, it is assumed that the operation is performed for 1 hour with the same load amount (that is, kW and kWh have the same value), and the operation cost is calculated.

Chp = Php × QL / COPhp (11)
Cb = Pb × QL / Eff (12)

The operation heat source selection means 3 is configured as a part of the function of the system controller 32, and as a result of comparing the operation cost estimated values Chp and Cb calculated by the above formulas (11) and (12), the heat source being stopped If the estimated operating cost is less than a predetermined percentage of the estimated operating cost of the currently operating heat source, it is determined that the operating heat source is stopped and the operation is started by switching to the stopped heat source. . For example, when the predetermined ratio is set to 95%, the operating heat source selection unit 3 determines that the heat source is switched when the stopped heat source falls to an operating cost estimate value of 95% or less of the operating heat source. To do. The reason why this predetermined ratio is provided is to prevent frequent switching operations of the heat source when the estimated operating cost values of both of them slightly fluctuate at a value close to the same value. The operating cost estimated value of the stopped heat source becomes an operating cost estimated value of 95% of the operating heat source, and after switching the heat source, to operate the stopped heat source again, the operating cost estimated value of the activated heat source is further increased. The estimated operating cost must be reduced to 95%.

However, if it is assumed that the cost estimate value frequently fluctuates and it may be necessary to repeatedly start and stop in a short time, from the viewpoint of stable operation of the heat source, the predetermined time may be A restart prohibition time for prohibiting startup may be provided, and the heat source may not be switched during the restart prohibition time.

The heat source switching control unit 4 is configured as a part of the function of the system controller 32 and switches the heat source between the heat pump device 20 and the combustion heat source 40 and starts operation based on the determination result by the operation heat source selection unit 3. The heat source side circulation pump to be started and the heat source side circulation pump to be stopped are stopped.

As shown in FIG. 2, the operating heat source determination unit 11 and the heat source switching control unit 4 are configured separately, but the present invention is not limited to this, and the operating heat source determination unit 11 and the heat source switching control unit 4 It is good also as an integrated concept.

(Effect of Embodiment 1)
As in the configuration and operation as described above, the operation cost in the heat pump device 20 and the combustion heat source 40 that are heat sources is estimated, and the estimated operation cost is used as determination information for switching the heat source, and the operation cost that is the determination information is Therefore, for example, when compared with a case where the heat pump device 20 is always operated independently, the operating cost can be surely reduced.

Embodiment 2. FIG.
The heat pump hot water supply and heating system according to the present embodiment will be described focusing on differences from the heat pump hot water supply and heating system according to the first embodiment.

(Configuration of heat pump hot water supply and heating system and heat source switching operation)
FIG. 6 is a diagram showing the configuration of various means for performing heat source switching in the heat pump hot water supply and heating system according to Embodiment 2 of the present invention.
In the heat pump hot water supply and heating system according to the present embodiment, as another determination criterion for the heat source switching operation between the heat pump device 20 that is a heat source and the combustion heat source 40, per unit power usage or per unit fuel usage. Of CO ₂ emissions. Heat pump water heating system according to the present embodiment, in place of the energy unit price obtaining unit 10 of the first embodiment, the CO ₂ emission coefficient storing unit 10a is provided, the CO ₂ emission coefficient storing unit 10a, the unit power usage The CO ₂ emission coefficient per unit and per unit fuel consumption is stored. Further, instead of the operation cost prediction unit 2 of the first embodiment, the CO ₂ emission amount estimation means 2a provided, CO ₂ emission amount estimation means 2a, the estimated CO ₂ emissions of the heat pump device 20 and the combustion type heat source 40 To do. Specifically, the calculation method of the CO ₂ emission amount is obtained by changing the electricity unit price Php and the fuel unit price Pb in the equations (11) and (12) in Embodiment 1 to the CO ₂ emission coefficient of electric power, respectively. , And the CO ₂ emission coefficient of the fuel.

Furthermore, the operation heat source selecting means 3, instead of comparing the operating cost estimate of the heat pump device 20 and the combustion type heat source 40, using a CO ₂ emission amount estimated by the CO ₂ emission amount estimation means 2a, suspended When the CO ₂ emission amount of the heat source is smaller than the CO ₂ emission amount of the operating heat source, it is determined that the operating heat source is stopped and switched to the stopped heat source to start the operation.

The CO ₂ emission estimation means 2a corresponds to the “determination information estimation means” of the present invention.

(Effect of Embodiment 2)
As described above, the CO ₂ emission amount in the heat pump device 20 and the combustion heat source 40 that are heat sources is estimated, and the estimated CO ₂ emission amount is used as the determination information for switching the heat source. since CO ₂ can be operated by switching the emissions of small heat source is, for example, when compared with a case or the like is continuously operating heat pump device 20 alone, can be reduced reliably CO ₂ emissions .

Embodiment 3 FIG.
The heat pump hot water supply and heating system according to the present embodiment will be described focusing on differences from the heat pump hot water supply and heating system according to the first embodiment.

(Configuration of heat pump hot water supply and heating system and heat source switching operation)
FIG. 7 is a diagram showing the configuration of various means for performing heat source switching in the heat pump hot water supply / heating system according to Embodiment 3 of the present invention.
As shown in FIG. 7, a three-way valve 23 a that adjusts the ratio of the hot water flowing out from the first heat exchanger 22 of the heat pump device 20 and the hot water flowing out from the combustion heat source 40 to the load side is installed. . That is, the opening degree of the three-way valve 23a is controlled by the system controller 32, so that the amount of heat supplied from the heat pump device 20 among the amount of heat supplied to the hot water storage tank 25, the radiator 26, and the floor heating device 27, and the combustion type The ratio to the amount of heat supplied from the heat source 40 can be adjusted. The three-way valve 23a may have a configuration in which a two-way valve capable of adjusting the flow rate is provided in each flow path.

The operation heat source determination means 11 distributes a load at a predetermined rate in addition to the operation costs of the single operation of each of the heat pump device 20 and the combustion heat source 40 and operates the heat pump device 20 and the combustion heat source 40 simultaneously. Calculate the operating cost for the case. Here, the heat source combination creating means 12 is provided in front of the heat source performance estimating means 1, and the load quantity QL obtained by the load quantity calculating means 5 is calculated based on a predetermined load distribution ratio α between the heat pump device 20 and the combustion heat source 40. The load amount of each heat source is obtained so that the load amount is α: 1−α. In addition, the combination of the load amount of each heat source may present a plurality of candidates from the range from the minimum to the maximum capability of the heat pump device 20 at the current hot water temperature and the outside air temperature.

When the heat pump device 20 and the combustion heat source 40 are operated simultaneously, it is necessary to correctly grasp the respective load amounts, so the forward hot water temperature sensors 33 and 33a, the return hot water temperature sensors 34 and 34a, and the flow rate sensor 37, 37a is indispensable, and the load amount calculation means 5 calculates the load amount QLhp and the load amount QLb, which are the load amounts of the heat pump device 20 and the combustion heat source 40, based on the aforementioned equation (2), The load amount QL is obtained by adding them.

The heat source performance estimating means 1 is based on the load amount of each heat source (the heat pump apparatus 20 and the combustion heat source 40) calculated by the heat source combination creating means, COPhp which is the value of COP of the heat pump apparatus 20, and the combustion heat source An efficiency Eff of 40 is calculated.

As described above in the first embodiment, the operation cost estimation means 2 is the operation cost estimation value Chp when the heat pump device 20 is operated alone, and the operation cost estimation value when the combustion heat source 40 is operated alone. While calculating Cb, the operating cost estimated value Chb in the case of operating the heat pump apparatus 20 and the combustion heat source 40 simultaneously is calculated by the following equation (13).

Chb = Php × (QL × α) / COPhp + Pb × {(QL × (1-α)} / Eff (13)

The operating heat source selection means 3 compares the operating cost estimates of the single operation of the heat pump device 20, the single operation of the combustion heat source 40, and the simultaneous operation of the heat sources at a plurality of load distribution ratios obtained by the heat source combination creating means 12. Then, it is determined that the operation is performed by a heat source (single or simultaneous operation) having the lowest operation cost.

The heat source switching control means 4 switches to a single operation by the heat pump device 20, a single operation by the combustion heat source 40, or a simultaneous operation of the heat pump device 20 and the combustion heat source 40 based on the determination result by the operation heat source selection means 3. At this time, when switching to simultaneous operation, the heat source switching control means 4 performs opening control of the three-way valve 23a in order to match the load distribution ratio of the heat pump device 20 and the combustion heat source 40.

In the single operation of the heat pump device 20, even when the operation cost is higher than that of the single operation of the combustion heat source 40, the load factor is reduced during the simultaneous operation, so the COP of the heat pump device 20 is higher than that of the single operation. Therefore, the operation cost is lower than the single operation of the heat pump device 20 in total. On the other hand, when the operating cost of the heat pump device 20 further increases, the operating cost of the single operation of the combustion heat source 40 is lower than that of the simultaneous operation. Therefore, as shown in FIG. 8, the simultaneous operation is positioned between the case where the operation cost of the single operation of the heat pump device 20 is low and the case where the operation cost of the single operation of the combustion heat source 40 is low, When operating partly, it is possible to operate at a lower operating cost than the single operation of the combustion heat source 40. With the above configuration, it is possible to reduce the operating cost as compared with the case where the heat pump device 20 and the combustion heat source 40 are respectively switched only by single operation.

The three-way valve 23a corresponds to the “flow path adjusting means” of the present invention.

(Effect of Embodiment 3)
As in the configuration and operation as described above, each operation cost estimation of the single operation of the heat pump device 20, the single operation of the combustion heat source 40, and the simultaneous operation of the heat source at a plurality of load distribution ratios obtained by the heat source combination creating means 12 is performed. Since the values are compared, the amount of heat can be supplied to the load side at the lowest operating cost including simultaneous operation.

The configuration considering the simultaneous operation of the heat sources of the heat pump hot water supply / heating system according to the present embodiment is also applicable to the heat pump hot water supply / heating system according to the second embodiment.

Embodiment 4 FIG.
In the present embodiment, details of the hardware configuration of the system controller 32 of the heat pump hot water supply and heating system according to the first to third embodiments will be described.

(Configuration of the system controller 32 of the heat pump hot water supply / heating system)
FIG. 9 is a configuration diagram of the system controller 32 of the heat pump hot water supply / heating system according to Embodiment 4 of the present invention. The heat source device controller 31 has the same configuration as the system controller 32, and the heat source device controller 31 and the system controller 32 may be a single controller as described above.

As shown in FIG. 9, the system controller 32 includes at least a CPU (Central Processing Unit) 51, a bus 52, a ROM (Read Only Memory) 53, a RAM (Random Access Memory) 54, an I / O processing unit 55, a communication. A processing unit 56 is provided. You may provide the communication processing part 58 connected with an external wired or wireless network.

The CPU 51 is connected to the ROM 53, the RAM 54, the I / O processing unit 55, the communication processing unit 56, and the communication processing unit 58 via the bus 52, and reads and executes the program stored in the ROM 53. The above hardware devices connected via the network are controlled.

The ROM 53 stores a program for executing the processing shown in FIG. 3 by the CPU 51, and is a nonvolatile storage medium.

The RAM 54 is a volatile storage medium that temporarily stores detection values from various sensors input via the I / O processing unit 55, operation signals from the remote controller 57, and the like. It is updated as needed.

The I / O processing unit 55 inputs detection values from each sensor, converts them to digital and stores them in the RAM 54, and converts the control signal processed by the CPU 51 into a signal form corresponding to the control input of each device. It is converted and output.

The communication processing unit 56 communicates with a wireless or wired remote controller 57 and receives data from the remote controller 57 or transmits display data to be displayed on a liquid crystal display unit of the remote controller 57.

The communication processing unit 58 is provided separately from the application of remote control communication, and is connected to a communication network such as the Internet or a telephone by wire or wireless. The communication processing unit 58 is connected to an information service company or a maintenance support company via the communication network, so that the energy unit price (electricity unit price and fuel unit price) or / and the CO ₂ emission coefficient are obtained. It can be obtained and kept up to date.

The communication processing unit 58 corresponds to “communication processing means” of the present invention.

1 heat source performance estimating means, 2 operating cost estimating means, 2a CO ₂ emission amount estimating means, 3 operating heat source selecting means, 4 heat source switching control means, 5 load amount calculating means, 6 outside air temperature acquiring means, 7 hot water temperature acquiring means, 8 heat pump characteristic data storage means, 9 combustion type heat source characteristic data storage means, 10 energy unit price storage means, 10a CO ₂ emission coefficient storage means, 11 operating heat source determination means, 12 heat source combination creation means, 20 heat pump device, 20a compressor, 20b Expansion device, 20c Evaporator, 21 Water flow path, 22 First heat exchanger, 23, 23a Three-way valve, 24, 24a Circulation pump, 25 Hot water storage tank, 26 Radiator, 27 Floor heating equipment, 28 Tank unit, 29 Second Heat exchanger, 30 outside temperature sensor, 31 heat source machine controller, 32 system controller, 3, 33a Outward hot water temperature sensor, 34, 34a Return hot water temperature sensor, 35 Tank water temperature sensor, 36 Room temperature sensor, 37, 37a Flow rate sensor, 38 Hot water temperature sensor, 40 Combustion heat source, 51 CPU, 52 bus, 53 ROM, 54 RAM, 55 I / O processing unit, 56 communication processing unit, 57 remote control, 58 communication processing unit.

Claims (11)

1. A heat pump device having a refrigeration cycle circuit in which a compressor, a radiator, an expansion device, and an evaporator are connected by a refrigerant pipe, and a water channel through which water that exchanges heat with the refrigerant that flows through the refrigerant channel via the radiator A combustion heat source that burns fuel and heats water flowing in the water flow path, and the heat pump device and the combustion heat source are connected in parallel by the water flow path in a heat pump hot water supply and heating system. There,
   Outside temperature measuring means for detecting and obtaining outside temperature;
   Hot water temperature measuring means for detecting and acquiring a hot water temperature that is a temperature of water flowing through the water flow path;
   A load amount calculating means for calculating a load amount of the heat pump device and a load amount of the combustion heat source;
   Heat pump characteristic data storage means for storing heat pump characteristic data, which is data relating to the association between the outside air temperature, the hot water temperature, the load amount of the heat pump device and the COP;
   Combustion-type heat source characteristic data storage means for storing combustion-type heat source characteristic data which is data relating to the efficiency and load amount of the combustion-type heat source;
   Energy unit price acquisition means storing the electricity unit price and fuel unit price,
   The outside air temperature acquired by the outside air temperature measuring means, the hot water temperature acquired by the hot water temperature measuring means, the load amount of the heat pump device calculated by the load amount calculating means, and the heat pump characteristic data storage The COP of the heat pump device is estimated based on the heat pump characteristic data stored in the means, and the efficiency of the combustion heat source based on the combustion heat source characteristic data stored in the combustion heat source characteristic data storage means Heat source performance estimating means for estimating
   Estimating the operating cost of the heat pump device based on the COP estimated by the heat source performance estimating means, the load amount of the heat pump device, and the unit price of electricity stored in the energy unit price acquisition means, and Determination of estimating the operating cost of the combustion type heat source based on the efficiency estimated by the heat source performance estimation unit, the load amount of the combustion type heat source, and the fuel unit price stored in the energy unit price acquisition unit Information estimation means;
   The operation cost estimated by the determination information estimation means is used as determination information, and the operation cost of the heat pump device, which is the determination information, is compared with the operation cost of the combustion heat source, and the operation cost is smaller. Operating heat source selection means for selecting as a heat source to be operated,
   Heat source switching control means for switching the operation to the heat source selected by the operating heat source selection means and stopping the other heat source;
   A heat pump type hot water supply and heating system equipped with.
2. A heat pump device having a refrigeration cycle circuit in which a compressor, a radiator, an expansion device, and an evaporator are connected by a refrigerant pipe, and a water channel through which water that exchanges heat with the refrigerant that flows through the refrigerant channel via the radiator A combustion heat source that burns fuel and heats water flowing in the water flow path, and the heat pump device and the combustion heat source are connected in parallel by the water flow path in a heat pump hot water supply and heating system. There,
   Outside temperature measuring means for detecting and obtaining outside temperature;
   Hot water temperature measuring means for detecting and acquiring a hot water temperature that is a temperature of water flowing through the water flow path;
   A load amount calculating means for calculating a load amount of the heat pump device and a load amount of the combustion heat source;
   Heat pump characteristic data storage means for storing heat pump characteristic data, which is data relating to the association between the outside air temperature, the hot water temperature, the load amount of the heat pump device and the COP;
   Combustion-type heat source characteristic data storage means for storing combustion-type heat source characteristic data which is data relating to the efficiency and load amount of the combustion-type heat source;
   CO ₂ emission coefficient per unit power consumption of the heat pump apparatus, and a CO ₂ emission coefficient storing means for storing CO ₂ emission coefficient per unit fuel consumption of the combustion heat,
   The outside air temperature acquired by the outside air temperature measuring means, the hot water temperature acquired by the hot water temperature measuring means, the load amount of the heat pump device calculated by the load amount calculating means, and the heat pump characteristic data storage The COP of the heat pump device is estimated based on the heat pump characteristic data stored in the means, and the efficiency of the combustion heat source based on the combustion heat source characteristic data stored in the combustion heat source characteristic data storage means Heat source performance estimating means for estimating
   The COP estimated by the heat source performance estimating means, the load of the heat pump apparatus, and, CO of the CO ₂ heat pump device based on the emission factor stored in the CO ₂ emission coefficient storing means and the heat pump apparatus ₂ , and the efficiency estimated by the heat source performance estimating means, the load amount of the combustion heat source, and the CO of the combustion heat source stored in the CO ₂ emission coefficient storage means Determination information estimating means for estimating the CO ₂ emission amount of the combustion-type heat source based on _two emission coefficients;
   The CO ₂ emissions estimated by the determination information estimating means and the determination information, compared with the CO ₂ emissions of the heat pump device is the determination information, and the CO ₂ emissions of the combustion heat, An operation heat source selection means for selecting the one with the smaller CO ₂ emission amount as a heat source to be operated;
   Heat source switching control means for switching the operation to the heat source selected by the operating heat source selection means and stopping the other heat source;
   A heat pump type hot water supply and heating system equipped with.
3. Comprising communication processing means connected to the network by wireless or wired;
   The communication processing means obtains the latest electricity unit price and the fuel unit price through the network, and sets the electricity unit price and the fuel unit price stored in the energy unit obtaining means respectively to the latest unit price. The heat pump hot water supply and heating system according to claim 1, wherein the system is updated with the unit price of electricity and the unit price of fuel.
4. Comprising communication processing means connected to the network by wireless or wired;
   The communication processing unit, the CO ₂ emission coefficient per unit power consumption of the latest of the heat pump device via the network, and acquires the CO ₂ emission coefficient per unit fuel consumption of the combustion heat source Te, the CO ₂ emission coefficient stored in the CO ₂ emission coefficient storing means and said heat pump device, and the CO ₂ emission factor of the said CO ₂ emission factor of the combustion heat, the respective date of the heat pump apparatus The heat pump hot water supply / heating system according to claim 2, wherein the heat pump hot water supply / heating system is updated by the CO ₂ emission coefficient of the combustion heat source.
5. The operating heat source selection unit selects the stopped heat source as an operation target when the determination information of the stopped heat source is smaller than a predetermined ratio of the determination information of the operating heat source. The heat pump hot water supply / heating system according to any one of claims 1 to 4.
6. Channel adjusting means for adjusting the amount of water flowing out of the heat pump device toward the load and the amount of water flowing out of the combustion heat source toward the load;
   A heat source combination creating means for creating data of a combination of load amounts of the heat pump device and the combustion heat source based on a plurality of predetermined load distribution ratios;
   With
   When the heat pump device and the combustion heat source are operating simultaneously, the load amount calculation means determines the individual load amounts and calculates a sum of them as a load amount,
   The determination information estimation means is based on the determination information when the heat pump device is operated alone, the determination information when the combustion heat source is operated alone, and the plurality of predetermined load distribution ratios. Estimating the determination information when the heat pump device and the combustion heat source are operated simultaneously,
   The operating heat source selection means includes the determination information when the heat pump device estimated by the determination information estimation means is operated alone, the determination information when the combustion heat source is operated alone, and the plurality of The determination information when the heat pump device and the combustion heat source are operated simultaneously based on a predetermined load distribution ratio is compared, and the heat source with the smallest determination information or the heat pump device and the combustion heat source is compared. Select the heat source related to the combination as the operation target,
   The heat source switching control means includes
   The heat source selected by the operating heat source selection means is operated alone, or the heat sources related to the combination of the heat pump device and the combustion heat source are operated simultaneously,
   The opening degree of the flow path adjusting means is controlled based on the corresponding load distribution ratio when the heat sources related to the combination of the heat pump device and the combustion heat source are operated simultaneously. The heat pump type hot water supply and heating system according to claim 5.
7. The heat source switching control unit starts the operation of the selected heat source after a predetermined time after stopping the heat source not selected by the operation heat source selecting unit. The heat pump hot water supply / heating system according to claim 6.
8. The heat pump characteristic data stored in the heat pump characteristic data storage means has for each of a plurality of load factors with respect to the associated data associating the outside air temperature, the hot water temperature, the load amount of the heat pump device and the COP. The heat pump hot water supply / heating system according to any one of claims 1 to 7, configured as:
9. The combustion-type heat source characteristic data stored in the combustion-type heat source characteristic data storage means associates at least one of the outside air temperature, the hot water temperature, the previous load amount or the load factor with the efficiency. Composed of data
   The heat source performance estimating means is configured to generate the combustion based on at least one data of the current outside air temperature, the hot water temperature, a previous load amount or the load factor, and the association data of the combustion heat source characteristic data. The heat pump hot water supply / heating system according to any one of claims 1 to 8, wherein the efficiency of the heat source is estimated.
10. A flow rate detecting means for detecting a hot water flow rate that is a flow rate of water flowing into and out of the heat source through the water flow path;
    The hot water temperature measuring means detects and obtains a forward hot water temperature which is a temperature of water flowing out from the heat source, a return hot water temperature which is a temperature of water flowing into the heat source,
    The load amount calculation means calculates the load amount of the heat source based on the hot water flow rate detected by the flow rate detection means and the forward hot water temperature and the return hot water temperature measured by the hot water temperature measurement means. 10. The heat pump hot water supply / heating system according to claim 1, wherein the heat pump hot water supply / heating system is calculated.
11. The heat pump hot water supply and heating system according to any one of claims 1 to 9, wherein the load amount calculation means calculates the load amount of the heat pump device based on an operating frequency of the compressor.

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