JP2007322013A - Heat storage-hot water combination heating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat storage-hot water combination heating system not requiring a wide space, and capable of finely controlling heat radiation, saving energy and reducing running costs. <P>SOLUTION: This heat storage-hot water combination heating system has a heat storage type heating device 6 for heating a room by radiating heat of a heat storage body 6b heated by electric power at night to store heat, in the daytime, and a hot water-type heating device S comprising a hot water storage tank 8a storing hot water, a circulation pump 8b for circulating the hot water in a building 1, and a heater panel 7 for radiating the heat of circulated hot water into the building 1, the heating is performed mainly by the heat storage type heating device 6 to heat the room at a minimal room temperature, the hot water-type heating device S is used at the same time when a room temperature becomes lower than the minimal room temperature, and the change of room temperature in accompany with the change of air temperature is compensated by the hot water-type heating device S by rising the room temperature by circulating the hot water in the building 1 by the circulation pump 8b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a residential heat storage and heating system that stores heat by using nighttime electric power.

  Conventionally, it has a heat pump device and a hot water storage tank, the water stored in the hot water storage tank is circulated between the heat pump device and the hot water storage tank, and the heat in the outside air is taken in by the heat pump device, so that the water in the hot water storage tank is Underfloor temperature adjustment that enables floor heating by storing hot water in a hot water storage tank and circulating the hot water with a circulation pump through a circulation pipe routed in the underfloor space of the building An apparatus is known (see Patent Document 1).

Moreover, it has a solid heat storage body and an electric heater, heats the heat storage body with heat generated by the electric heater, radiates the heat once stored in the heat storage body to the indoor space, and according to the room temperature 2. Description of the Related Art A heat storage and heating device that controls electric power supplied to an electric heater and controls the room temperature by adjusting the amount of heat stored in the heat storage body is known (see Patent Document 2, etc.).
JP 2001-254965 A JP 2003-262347 A

However, in the underfloor temperature control device, when water is heated and stored by night electricity with a low electricity charge, and this heat is used to cover daytime heating, for example, the heating of a house having a floor area of about 70 m ² is provided. In consideration of the specific heat of water, a hot water storage tank having a capacity of at least 2000 liters is required, and a large space must be secured for this hot water storage tank.

  Further, if a hot water storage tank having a practical capacity of about 500 liters was used, it was insufficient to cover daytime heating.

  And in the heat storage and heating device, since the heat capacity of the heat storage body used in this heat storage and heating device is very large compared to general metals etc., it takes time to change the temperature, and the heat dissipation amount of the heat storage body It was difficult to finely control the temperature according to changes in room temperature.

  In particular, when heat is stored in a heat accumulator using nighttime electricity with a low charge, and the stored heat is used to cover daytime heating, the heat stored at night is unilaterally dissipated during the day. Therefore, it is even more difficult to control the heat radiation amount.

  In view of the above, the present invention has an object to provide a combined heating system with stored heat and hot water that does not require a wide space and can not only finely control the amount of heat release but also save energy and low running costs.

In order to achieve the above object, the invention described in claim 1 is characterized in that the heat storage body is heated at night using electric power to store heat in the heat storage body, and the heat stored in the heat storage body is stored indoors in the daytime. And having a regenerative heating device used for heating the room,
A hot water storage tank for storing hot water, a hot water circulation means for circulating the hot water stored in the hot water storage tank, and heat for radiating the heat of the hot water circulated by the hot water circulation means into the building A hot water heating device provided with a heat dissipation device;
In order to heat the room to a target temperature, heating is mainly performed by the regenerative heating device, and when the room temperature is lower than the target temperature, the hot water heating device is used together, and the hot water circulation means The heating water is heated by circulating the hot water in the building, and the heating water combined heating system in which the temperature difference between the room temperature and the target temperature is covered by the hot water heating device is characterized. .

  The invention described in claim 2 is characterized by the heat storage hot water combined heating system described in claim 1, wherein the hot water stored in the hot water tank is obtained using a heat pump.

  Moreover, the invention described in claim 3 is the combined heat storage hot water heating according to claim 1 or 2, wherein the hot water stored in the hot water tank is obtained by using nighttime electric power. Features the system.

  Furthermore, the invention described in claim 4 is characterized by the regenerative hot water combined heating system described in any one of claims 1 to 3 in which the heat dissipation device is provided in the room.

In the first aspect of the present invention configured as described above, in order to heat the room until the target temperature is reached, heating is mainly performed by the regenerative heating device, and when the room temperature is lower than the target temperature, Since the hot water heating device is used together, the hot water circulation means circulates the hot water in the building to raise the temperature in the room, and the hot water heating device covers the temperature difference between the room temperature and the target temperature.
By using only the regenerative heating system, the regenerator is overheated and the heating becomes too strong, or conversely the heating of the regenerator is too weak so that the heating is not too strong and the heating becomes too weak. And never
In addition, by circulating the hot water in the building by the hot water circulation means and changing the flow rate per unit time of the hot water to be circulated, the room temperature can be finely adjusted and a stable room temperature can be maintained.

  Moreover, since the air in a building is warmed with the heat at the time of heating the heat storage body of a heat storage type heating apparatus at night, there is no useless energy consumption and energy saving property is high.

  Furthermore, compared to the case where daytime heating is performed using only the hot water heating device, when the hot water heating device and the regenerative heating device are used in combination, a part of the amount of heat necessary for heating is stored in the regenerative type. Since the heating device covers it, the amount of heat released by the hot water heating device can be reduced, and as a result, the capacity of the hot water storage tank of the hot water heating device can be reduced.

  Compared to the case where daytime heating is performed using only a regenerative heating device, when a hot water heating device and a regenerative heating device are used in combination, a part of the amount of heat required for heating is heated. Since the heating device covers it, the amount of heat released by the regenerative heating device can be reduced. As a result, there is no possibility of overheating the heat storage body of the regenerative heating device, and heating can be performed safely.

  And since the thing of Claim 2 of this invention uses the heat pump whose thermal efficiency is high compared with the electric heater using a heating wire, a ceramic heater, etc. for the heating of warm water, it heats with cheap running cost Can do.

  Moreover, since the thing of Claim 3 of this invention can store heat using late-night electric power, it can store heat with the cheap electric power charge of midnight, and can use this heat for daytime heating. As a result, daytime heating can be performed at a lower running cost.

  Further, according to the fourth aspect of the present invention, since the heat dissipation device is provided in the room, the temperature of the room air can be directly and efficiently increased.

  Hereinafter, the present invention will be described based on examples of embodiments according to the present invention.

<Overall configuration>
FIG. 1 is a top view of a first floor portion of a building where the combined heat storage hot water heating system of this embodiment is viewed from above, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is the side view which looked at the 1st floor part of the building where the warm water combined heating system was installed from the side.

  In FIG. 1, 1 is a building in which the combined heat storage hot water heating system of this embodiment is installed, 2 is an entrance hall, 3 is a living dining room, 4 is a Japanese-style room, and 5 is a washroom.

It is assumed that the building 1 of this embodiment has a heat insulation performance that conforms to the next generation energy saving standard, the foundation is heat-insulated, and has a total floor area of about 70 m ² .

  As shown in FIG. 2, an underfloor space 1 a is provided under the floor of the building 1. As shown in FIG. 1, the underfloor of the entrance hall 2, the underfloor of the living dining room 3, and the underfloor of the Japanese room 4 are provided. In each case, a regenerative heating device 6 is installed.

  The building 1 is provided with a hot water heating system S, and the hot water heating system S includes a heater panel 7 as a heat radiating unit.

  The heater panels 7 are installed in the living dining room 3, the Japanese-style room 4, and the washroom 5, respectively.

<Configuration of heat storage type heating device 6>
The regenerative heating device 6 is composed of an electric heater 6a and a heat accumulator 6b, and the heat accumulator 6b such as brick is heated to a high temperature of about 600 ° C., for example, with the heat generated by the electric heater 6a. By heating, the heat stored in the heat storage body 6b continues to be released even after the heating is stopped, and the released heat heats the air in the underfloor space 1a, and each room on the first floor via this air The floor is heated and each room is heated by floor heating.

  The regenerative heating device 6 of the present embodiment uses an output of about 2 kW.

  In the regenerative heating device 6, it is possible to adjust the heating temperature and the amount of heat stored in the heat storage body 6b by the electric heater 6a by controlling the power supplied to the electric heater 6a, but the heating by the electric heater 6a It takes a considerable time for the temperature of the heat storage body 6b to reach the heating temperature after the temperature is changed.

<Configuration of hot water heating system S>
The hot water heating system S is mainly composed of a heater panel 7, a hot water storage unit 8, a heat pump unit 9, and a circulation pipe 10. A hot water storage unit 8 and a heat pump unit 9 are provided outside the building 1. is set up.

  The hot water storage unit 8 is provided with a hot water storage tank 8a having heat retention and a circulation pump 8b.

  In the hot water heating system S, during operation, the water stored in the hot water storage tank 8 a is circulated between the hot water storage unit 8 and the heat pump unit 9.

  The heat pump unit 9 absorbs heat from the outside air, heats the circulating water with the absorbed heat, returns the heated hot water to the hot water storage tank 8a, and again heats the hot water in the hot water storage tank 8a to the heat pump. Circulate through unit 9 and repeat heating.

  In this way, a certain amount of hot water is secured in the hot water storage tank 8a simultaneously with pouring hot water.

  Then, when the target room temperature is set by operating an operation panel (not shown) provided in the living dining room 3 or the like, when the room temperature does not reach the target room temperature, the circulation pump 8b is driven and the hot water storage tank The hot water stored in 8a is sent to the heater panel 7 through the circulation pipe 10, heat is radiated by the heater panel 7, and the indoor air is heated.

  Further, by controlling the amount of heat absorbed from the outside air by the heat pump unit 9, it is possible to set the temperature of the hot water stored in the hot water storage tank 8a, and further, the unit time sent by the circulation pump 8b By adjusting the amount of hot water per minute, subtle room temperature control is possible.

  The hot water storage tank 8a of the present embodiment uses about 500 liters, and the heat pump unit 9 uses about 6 kW of output.

<How to use the heating system with heat storage and hot water>
For example, when the regenerative heating device 6 is operated during an inexpensive time period from 11:00 to 7:00 in the evening, the regenerator 6b is heated with heat generated by the electric heater 6a, and the regenerated heat storage Heat is released from the body 6b.

  At night, the air in the underfloor space 1a is warmed with the released heat, and the entire floor is warmed through the air in the underfloor space 1a, thereby heating the floors of the rooms on the first floor.

  And, for example, when the regenerative heating device 6 is stopped at 7:00 in the morning and the supply of electric power to the electric heater 6a is stopped, heating to the regenerator 6b is stopped, but the heat capacity of the regenerator 6b is, for example, Since it is extremely large compared with general metals, heat is continuously released for a while, the air in the underfloor space 1a is warmed, and the floor heating of each room on the first floor is continued even in the daytime.

  However, since there is a limit to the amount of heat released from the heat storage body 6b, the room temperature may be lower than the target temperature when the heat storage type heating device 6 alone is cold.

  Therefore, the regenerative heating device 6 is stopped at 7 am and the operation panel (not shown) of the hot water heating system S is operated to set the set temperature of the hot water heating system S to a target temperature.

  If the hot water heating system S is set in this way, the amount of heat released from the regenerative heating device 6 is insufficient, and when the room temperature falls below the target temperature, the circulation pump 8b is automatically driven. Then, the hot water stored in the hot water storage tank 8a is sent to the heater panel 7 through the circulation pipe 10, and heat is radiated by the heater panel 7 so that the indoor air is heated.

  In the present embodiment, by setting the hot water heating system S, the heat pump unit 9 is operated during an inexpensive night time zone from 11:00 to 7:00 in the morning, and the hot water storage tank 8a Water shall be stored.

<Effects of heating system with heat storage and hot water>
In order to heat the room to the target temperature, heating is mainly performed by the regenerative heating device 6, and when the room temperature is lower than the target temperature, the hot water heating device S is used together, and hot water is supplied by the circulation pump 8b. Since the room temperature is raised by circulating in the building 1 and the temperature difference between the room temperature and the target temperature is raised by the hot water heating device S,
By using only the regenerative heating device 6, the regenerator 6b is overheated and the heating becomes too strong, or conversely, the heating of the regenerator 6b is too weak so that the heating is not too strong. Without being too weak,
In addition, by circulating the hot water in the building 1 with the circulation pump 8b and changing the flow rate per unit time of the hot water to be circulated, the room temperature can be finely adjusted and a stable room temperature can be maintained.

  Moreover, since the air in the building 1 is warmed by heat when the heat storage body 6b of the heat storage type heating device 6 is heated even at night, there is no wasteful energy consumption and high energy saving performance.

  Furthermore, compared with the case where daytime heating is performed using only the hot water heating device S, when the hot water heating device S and the regenerative heating device 6 are used in combination, a part of the amount of heat necessary for heating is used. Therefore, the amount of heat radiation that the hot water heating device S should bear is small, and as a result, the capacity of the hot water storage tank of the hot water heating device S can be reduced.

  In addition, compared with the case where daytime heating is performed using only the regenerative heating device 6, when the hot water heating device S and the regenerative heating device 6 are used in combination, a part of the amount of heat necessary for heating is used. Since the hot water heating device S covers this, the heat radiation amount to be borne by the regenerative heating device 6 can be reduced, and as a result, there is no risk of overheating the heat storage body 6b of the regenerative heating device 6 and it is safe. Heating can be performed.

  And since the heat pump unit 9 with high thermal efficiency compared with the electric heater using a heating wire, a ceramic heater, etc. is used for heating warm water, heating can be performed at a low running cost.

  In addition, since heat can be stored using late-night electricity, heat can be stored using low-cost electricity charges at midnight, and daytime heating is performed using this heat, so daytime can be carried out at a lower running cost. Can be heated.

  Furthermore, since the heater panel 7 is provided in the room, the temperature of the room air can be directly and efficiently increased.

  As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to this specific configuration, and design changes that do not depart from the spirit of the present invention are included in the technical scope of the present invention.

  In addition, in the heat storage warm water combined heating system of a present Example, although heating of warm water is performed by the heat pump unit 9, it does not necessarily need to be the heating using a heat pump.

  For example, heating may be performed using solar heat, or geothermal heat may be used.

It is the upper side figure which looked at the 1st floor part of the building where the heating system with heat storage warm water of this example was installed from the upper part. It is AA sectional drawing of FIG. 1, and is the side view which looked at the 1st-floor part of the building in which the heat storage combined hot water heating system of the present Example was installed from the side.

Explanation of symbols

1 Building 3 Living dining room (indoor)
4 Japanese-style room (indoor)
5 Washroom (indoor)
6 Heat storage type heating device 6b Heat storage body 7 Heater panel (heat dissipation device)
8a Hot water storage tank (hot water tank)
8b Circulation pump (warm water circulation means)
9a Heat pump unit (heat pump)
10 Circulation piping (warm water circulation means)
S Hot water heating system (hot water heating system)

Claims (4)

The heat storage body is heated at night using electric power, heat is stored in the heat storage body, the heat of the stored heat storage body is radiated indoors in the daytime, and the regenerative heating device is used for heating the room. With
A hot water storage tank for storing hot water, a hot water circulation means for circulating the hot water stored in the hot water storage tank, and heat for radiating the heat of the hot water circulated by the hot water circulation means into the building A hot water heating device provided with a heat dissipation device;
In order to heat the room to a target temperature, heating is mainly performed by the regenerative heating device, and when the room temperature is lower than the target temperature, the hot water heating device is used together, and the hot water circulation means Heating the indoors by circulating the hot water in the building, and using the hot water heating device to raise the temperature difference between the room temperature and the target temperature. system.   The said hot water stored by the said hot water tank is obtained using a heat pump, The heat storage hot water combined heating system described in Claim 1 characterized by the above-mentioned.   The said hot water stored in the said hot water tank is obtained using nighttime electric power, The heat storage hot water combined heating system described in any one of Claim 1 or Claim 2 characterized by the above-mentioned.   The heat storage hot water combined heating system according to any one of claims 1 to 3, wherein the heat dissipation device is provided in the room.

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