JP2008064444A - Hot water circulation heating system circulating hot water to carry out heating in building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water circulation heating system capable of fully employing characteristics of a heat pump. <P>SOLUTION: The hot water circulation heating system circulates hot water to carry out heating in a building, and it is provided with a tank 40 storing hot water, the heat pump 10 heating the hot water in the tank 40, an indoor radiator radiating heat belonging to the hot water into indoor air, a toilet interior radiator, and a circulating pump 51 for indoor heating. The hot water from the tank 40 flows to the indoor radiator, then it flows to the toilet interior radiator, and it is returned to the tank 40. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hot water circulation heating system, and more particularly to a hot water circulation heating system that performs heating by circulating hot water in a building.

Conventionally, a hot water circulation heating system that heats buildings by generating hot water using a boiler or electric heater and circulating the hot water to the radiators installed in each room in the building has spread mainly in cold regions such as Europe. is doing. For example, in the air conditioning system disclosed in Patent Document 1, cold / hot water supply means for supplying cold / hot water is installed outdoors or underground in a house, and hot water is supplied to heat exchangers and floor heating devices provided in each room. Supplied so that the room can be heated.
JP-A-10-266351

  Thermal efficiency, which is the merit of heat pumps when compared to boilers and electric heaters, when considering adopting a heat pump as a heat source for generating hot water in a hot water circulating heating system that circulates hot water in a building However, no heat pump has actually been used as a heat source for the hot water circulation heating system. The inventor of the present application recognizes that, in a hot water circulation heating system using a conventional boiler or the like as a heat source, simply replacing the boiler with a heat pump will not make full use of the characteristics of the heat pump with excellent thermal efficiency. Yes.

  The subject of this invention is providing the warm water circulation heating system which can fully utilize the characteristic of the heat pump which is excellent in thermal efficiency.

  A hot water circulation heating system according to a first aspect of the invention is a hot water circulation heating system that circulates hot water in a building to perform heating, a hot water storage tank, a vapor compression heat pump, an indoor radiator, and a toilet A radiator and a circulation pump are provided. The heat pump heats the hot water in the tank. The indoor radiator is disposed in the room of the building and dissipates the heat of the hot water to the indoor air of the room. The radiator in the toilet is disposed in the toilet of the building and dissipates the heat of the hot water in the toilet. The circulation pump allows hot water to flow from the tank to the indoor radiator and the radiator in the toilet, and returns the hot water radiated by the indoor radiator and the toilet radiator to the tank again. And in this warm water circulation heating system, the warm water which came out of the tank flows through the indoor radiator and then flows through the toilet radiator and returns to the tank.

  Here, the hot water in the tank is heated by the operation of the heat pump. As a result, hot water having a high temperature of, for example, 70 ° C. is stored in the tank. When this hot water is sent to the indoor radiator in the living room or the toilet radiator in the toilet by the operation of the circulation pump, the heat of the hot water moves around the room air or the radiator in the toilet. It is heated and certain parts of the toilet are warmed. And the hot water which temperature fell will return to a tank again. The hot water whose temperature has been lowered is raised again by the operation of the heat pump.

  By the way, as a characteristic of a heat pump, generally, the thermal efficiency of a heat pump improves, so that the temperature change range of heating object is wide. For example, for the hot water in the tank, the thermal efficiency of the heat pump when heating 10 ° C. warm water to 70 ° C. is considerably greater than the thermal efficiency of the heat pump when heating 40 ° C. hot water to 70 ° C. (FIG. 7 and FIG. 7). (See FIG. 8).

  In view of this, in this hot water circulation heating system, a radiator (toilet radiator) is also installed in a toilet that is not a living room, so that the hot water that comes out of the tank flows through the indoor radiator after flowing through the indoor radiator. It is configured. Thus, for example, hot water that enters the indoor radiator at 70 ° C and exits the indoor radiator at 40 ° C lowers the temperature by passing through the radiator in the toilet, and when returning to the tank, the temperature decreases to, for example, 10 ° C. It becomes a state. Then, the temperature of the warm water returning to the tank becomes very small, and the heat pump that heats the warm water from that temperature to 70 ° C., for example, can heat the warm water with very high thermal efficiency. In this case, the electric heater in the toilet, which has been installed separately from the hot water circulation heating system, can be omitted, and the heating work in the toilet is handled by a heat pump with higher thermal efficiency than the electric heater. Therefore, energy saving can be achieved.

The hot water stored in the tank and circulated by the circulation pump may be liquid and may not be water (H ₂ O).

  The hot water circulation heating system according to the second invention is the hot water circulation heating system according to the first invention, wherein the radiator in the toilet has a heat dissipating part in the toilet seat. The heat dissipating part in the toilet seat is provided inside the toilet seat of the toilet, and dissipates heat of the hot water to the toilet seat.

  Here, the radiator in the toilet radiates the heat of the hot water to the toilet seat inside the toilet seat of the toilet. The purpose of the radiator in the toilet is to warm the toilet seat, and it is not necessary to make the temperature of the hot water flowing through the interior as high as the radiator in the room, and the temperature of the hot water returning to the tank is inevitably reduced. For example, even if the hot water coming out of the indoor radiator is 40 ° C, the radiator in the toilet can sufficiently warm the toilet seat, and the temperature of the warm water returning to the tank can be lowered to, for example, 30 ° C or less. The

  A hot water circulation heating system according to a third invention is the hot water circulation heating system according to the first invention, wherein the radiator in the toilet has a radiator in the toilet tank. The heat radiating part in the toilet tank is provided inside the toilet tank that collects wash water for the toilet, and dissipates the heat of the hot water to the wash water in the toilet tank.

  Here, the radiator in the toilet dissipates heat from the wash water in which the heat of the hot water is accumulated inside the toilet tank that collects the wash water of the flush toilet. The purpose of the radiator in the toilet is to warm the wash water in the toilet tank and increase the washing capacity, and it is not necessary to raise the temperature of the hot water flowing inside the room as the radiator in the room, and inevitably returns to the tank. The temperature of the hot water becomes smaller. For example, even if the hot water exiting the indoor radiator is 40 ° C., the radiator in the toilet can slightly improve the cleaning performance by warming the cleaning water a little, and the temperature of the warm water returning to the tank is, for example, 20 ° C. Dropping to the following is also realized.

  A hot water circulation heating system according to a fourth invention is the hot water circulation system according to the third invention, wherein the toilet tank is provided inside a toilet seat of the toilet.

  Here, the toilet seat is a toilet tank that collects wash water, and the radiator in the toilet dissipates heat from the wash water in the toilet tank that collects wash water in the flush toilet. ing. The purpose of the radiator in the toilet is to warm the wash water in the toilet tank and increase the washing capacity, and it is not necessary to raise the temperature of the hot water flowing inside the room as the radiator in the room, and inevitably returns to the tank. The temperature of the hot water becomes smaller. For example, even if the hot water exiting the indoor radiator is 40 ° C., the radiator in the toilet can slightly improve the cleaning performance by warming the cleaning water a little, and the temperature of the warm water returning to the tank is, for example, 20 ° C. Dropping to the following is also realized. Further, since the toilet tank is incorporated in the toilet seat of the toilet, it is not necessary to secure another place for installing the toilet tank, and the toilet can be downsized.

  A hot water circulation heating system according to a fifth aspect of the present invention is the hot water circulation heating system according to any of the second to fourth aspects of the present invention, wherein the radiator in the toilet further includes a toilet air radiator. The toilet air heat dissipating part dissipates the heat of the hot water to the air in the toilet.

  Here, in addition to the heat dissipating part in the toilet seat or the heat dissipating part in the toilet tank, since the heat dissipating part for the toilet air is further provided in the toilet heat dissipator, the function of the heat dissipating apparatus in the toilet to lower the temperature of the hot water returning to the tank Will be strengthened. In addition, the toilet is loosely heated and the thermal environment in the building is improved.

  A hot water circulation heating system according to a sixth aspect of the present invention is the hot water circulation heating system according to any of the second to fifth aspects of the invention, wherein the toilet radiator dissipates heat of the hot water to the floor in the toilet. It further has a floor heat radiation part.

  Here, the radiator in the toilet radiates the heat of the hot water to the floor in the toilet. The purpose of the radiator in the toilet is to warm the floor in the toilet, and it is not necessary to raise the temperature of the hot water flowing through the interior as much as the radiator in the room, and the temperature of the hot water that inevitably returns to the tank is reduced.

  Thereby, for example, even if the hot water discharged from the indoor radiator is 40 ° C., the radiator in the toilet can sufficiently warm the floor of the toilet, and the temperature of the warm water returning to the tank is lowered to, for example, 20 ° C. or less. It is also realized.

  A hot water circulation heating system according to a seventh aspect of the present invention is a hot water circulation heating system that circulates hot water in a building and performs heating, and a tank for storing hot water, a vapor compression heat pump, an indoor radiator, and a window frame A radiator and a circulation pump are provided. The heat pump heats the hot water in the tank. The indoor radiator is arranged in the room of the building and dissipates the heat of the hot water to the indoor air of the room. The window frame radiator is formed on the window frame of a building window, and dissipates the heat of hot water to the air in the vicinity of the window. The air in the vicinity of the window includes indoor air and outdoor air. The circulation pump allows hot water to flow from the tank to the indoor radiator and the window frame radiator, and returns the warm water radiated by the indoor radiator and window frame radiator to the tank again. And in this warm water circulation heating system, the warm water which came out of the tank flows through the indoor radiator and then flows through the window frame radiator and returns to the tank.

  Here, the hot water in the tank is heated by the operation of the heat pump. As a result, hot water having a high temperature of, for example, 70 ° C. is stored in the tank. When this hot water is sent to the indoor radiator or window frame radiator in the living room by the operation of the circulation pump, the heat of the hot water moves to the indoor air in the room or the air around the window frame radiator, and the room is heated. Is done. And the hot water which temperature fell will return to a tank again. The hot water whose temperature has been lowered is raised again by the operation of the heat pump.

  By the way, as a characteristic of a heat pump, generally, the thermal efficiency of a heat pump improves, so that the temperature change range of heating object is wide. For example, for the hot water in the tank, the thermal efficiency of the heat pump when heating 10 ° C. warm water to 70 ° C. is considerably greater than the thermal efficiency of the heat pump when heating 40 ° C. hot water to 70 ° C. (FIG. 7 and FIG. 7). (See FIG. 8).

  In view of this, in this hot water circulation heating system, a window frame radiator is installed in the window frame of the building window, and the hot water that comes out of the tank flows through the indoor radiator and then flows through the window frame radiator. ing. Thus, for example, hot water that enters the indoor radiator at 70 ° C. and exits the indoor radiator at 40 ° C. further decreases the temperature by passing through the window frame radiator, and when returning to the tank, the temperature is increased to, for example, 10 ° C. It will be in a lowered state. Then, the temperature of the warm water returning to the tank becomes very small, and the heat pump that heats the warm water from that temperature to 70 ° C., for example, can heat the warm water with very high thermal efficiency. In this case, the temperature of the cold air that has come down from the windows in the past is relaxed by the heat released from the window frame radiator, so that the temperature drop in the room is suppressed, and the temperature deviation in each part of the room is suppressed. It is also possible to obtain a useful effect. Thereby, in the hot water circulation heating system which concerns on 7th invention, a heat pump can be operated with high thermal efficiency, and energy saving can be achieved.

  A hot water circulation heating system according to an eighth invention is the hot water circulation heating system according to the seventh invention, wherein the window frame radiator is a pipe housed inside the window frame, or the window frame itself serving as a hot water flow path. It is.

  A hot water circulation heating system according to a ninth aspect of the present invention is a hot water circulation heating system that circulates hot water in a building and performs heating, wherein the tank stores hot water, a vapor compression heat pump, an indoor radiator, and an air supply A unit radiator and a circulation pump are provided. The heat pump heats the hot water in the tank. The indoor radiator is arranged in the room of the building and dissipates the heat of the hot water to the indoor air of the room. The air supply unit radiator is formed in an air supply unit that takes in outside air supply into a building, and dissipates heat of hot water from the air supply unit to the outside air supply that is taken into the room. The circulation pump causes hot water to flow from the tank to the indoor radiator and the air supply unit radiator, and returns the hot water radiated by the indoor radiator and the air supply unit radiator to the tank again. And in this warm water circulation heating system, after the warm water which came out of the tank flows through the indoor radiator, it flows through the air supply unit radiator and returns to the tank.

  By the way, as a characteristic of a heat pump, generally, the thermal efficiency of a heat pump improves, so that the temperature change range of heating object is wide. For example, for the hot water in the tank, the thermal efficiency of the heat pump when heating 10 ° C. warm water to 70 ° C. is considerably greater than the thermal efficiency of the heat pump when heating 40 ° C. hot water to 70 ° C. (FIG. 7 and FIG. 7). (See FIG. 8).

  In view of this, in this hot water circulation heating system, an air supply unit radiator is installed in an air supply unit that takes in outside air supply into the building, and the hot water that has exited the tank flows through the indoor radiator to dissipate the air supply unit. It is configured to flow through the vessel. Thus, for example, hot water that enters the indoor radiator at 70 ° C. and exits the indoor radiator at 40 ° C. further decreases the temperature by passing through the air supply unit radiator, and returns to, for example, 10 ° C. when returning to the tank. Is in a lowered state. Then, the temperature of the warm water returning to the tank becomes very small, and the heat pump that heats the warm water from that temperature to 70 ° C., for example, can heat the warm water with very high thermal efficiency. In this case, conventionally, the low-temperature outside air temperature taken from the air supply unit is alleviated by the heat released from the air supply unit radiator, so that the temperature drop in the room can be suppressed, or the temperature deviation in each part of the room It is also possible to obtain a useful effect of suppressing the above. Thereby, in the hot water circulation heating system which concerns on 9th invention, a heat pump can be operated with high thermal efficiency, and energy saving can be achieved.

  A hot water circulation heating system according to a tenth aspect of the invention is the hot water circulation heating system according to the ninth aspect of the invention, wherein the air supply unit radiator is provided in a duct that guides outside air supply from the air supply unit to the room. It has a heat radiating part in the duct that radiates the heat it has to the outside air supply.

  Here, the air supply unit radiator dissipates the heat of the hot water from the air supply unit to the outside air supply taken in the duct. The purpose of the air supply unit radiator is to warm the outside air supply taken from the air supply unit, and it is not necessary to make the temperature of the hot water flowing inside the room as high as the indoor radiator, and inevitably returns to the tank. The temperature of becomes smaller. Thereby, for example, even if the hot water discharged from the indoor radiator is 40 ° C., the air supply unit radiator can sufficiently warm the outside air supply in the duct, and the temperature of the hot water returning to the tank is set to 30 for example. It is also possible to drop to below ℃.

  A hot water circulation heating system according to an eleventh aspect of the present invention is a hot water circulation heating system that circulates hot water in a building to perform heating, a hot water storage tank, a vapor compression heat pump, an indoor radiator, and an indoor room. A warm water flow rate adjustment valve, a first window frame radiator, and a first window frame warm water flow rate adjustment valve are provided. The heat pump heats the hot water in the tank. The indoor radiator is disposed in the room of the building and dissipates the heat of the hot water to the indoor air of the room. The indoor warm water flow rate adjustment valve is provided on the warm water inlet side of the indoor radiator and adjusts the inflow amount of the warm water. The first window frame radiator is formed on a window frame of a building window, and dissipates the heat of hot water to the air in the vicinity. The first window frame warm water flow rate adjustment valve is provided in the first window frame radiator and adjusts the inflow amount of warm water. The circulation pump allows hot water to flow from the tank to the indoor radiator and / or the first window frame radiator, and returns the warm water radiated by the indoor radiator and / or the first window frame radiator to the tank again. . The opening degree of the room warm water flow rate adjustment valve and the first window frame warm water flow rate adjustment valve is adjusted according to the temperature of the room air in the room.

  Here, the hot water in the tank is heated by the operation of the heat pump. As a result, hot water having a high temperature of, for example, 70 ° C. is stored in the tank. When this hot water is sent to the indoor radiator or the first window frame radiator in the living room by the operation of the circulation pump, the heat of the hot water moves to the indoor air in the living room or the air around the first window frame radiator. The room is heated. And the hot water which temperature fell will return to a tank again. The hot water whose temperature has been lowered is raised again by the operation of the heat pump.

  By the way, as a characteristic of a heat pump, generally, the thermal efficiency of a heat pump improves, so that the temperature change range of heating object is wide. For example, for the hot water in the tank, the thermal efficiency of the heat pump when heating 10 ° C. warm water to 70 ° C. is considerably greater than the thermal efficiency of the heat pump when heating 40 ° C. hot water to 70 ° C. (FIG. 7 and FIG. 7). (See FIG. 8).

  In view of this, in this hot water circulation heating system, the first window frame radiator is installed in the window frame of the building window, and the hot water exiting the tank flows not only to the indoor radiator but also to the first window frame radiator. It is configured as follows. Thus, for example, warm water entering the indoor radiator at 70 ° C. and exiting the indoor radiator at 40 ° C., and warm water entering the first window frame radiator at 70 ° C. and exiting the first window frame radiator at 5 ° C. By mixing, the temperature is further lowered as compared with the case where only the indoor radiator is used, and when returning to the tank, the temperature is lowered to 20 ° C., for example. Then, the temperature of the warm water returning to the tank becomes very small, and the heat pump that heats the warm water from that temperature to 70 ° C., for example, can heat the warm water with very high thermal efficiency. In this case, the temperature of the cold air that has conventionally come down from the window is relaxed by the heat released from the first window frame radiator, and the temperature drop in the room can be suppressed, or the temperature deviation in each part of the room It is also possible to obtain a useful effect of suppressing the above. Thereby, in the hot water circulation heating system which concerns on 11th invention, a heat pump can be operated with high thermal efficiency and energy saving can be achieved.

  A hot water circulation heating system according to a twelfth aspect of the invention is the hot water circulation heating system according to the eleventh aspect of the invention, comprising a second window frame radiator and a second window frame warm water flow rate adjustment valve. The second window frame radiator is formed on a window frame of a building window and dissipates heat of hot water to the air in the vicinity of the window. A 2nd window frame warm water flow rate adjustment valve is provided in the 2nd window frame radiator, and adjusts the inflow amount of warm water. The opening degrees of the room warm water flow rate adjustment valve, the first window frame warm water flow rate adjustment valve, and the second window frame warm water flow rate adjustment valve are adjusted according to the temperature of the room air in the room.

  Here, even when there are a plurality of window frames and a plurality of window frame radiators, the inflow amount of hot water can be adjusted according to the temperature condition of each window frame. Thereby, for example, the temperature of the hot water can be effectively lowered by circulating the hot water in preference to the window frame radiator formed in the window frame having a low temperature.

  A hot water circulation heating system according to a thirteenth aspect of the present invention is the hot water circulation heating system according to the twelfth aspect of the present invention, wherein the first window frame radiator is formed on the window frame of the first window installed in the north of the building. ing. The second window frame radiator is formed on the window frame of the second window other than the first window.

  Here, there are window frame radiators that are installed in the window frame of the first window on the north side and those that are installed in the window frame of the other second window. There is a difference in temperature between the north and south sides of the building due to the effects of solar radiation. Thereby, for example, in the northern hemisphere, the temperature of the warm water can be effectively lowered by circulating the warm water preferentially through the window on the north side.

  A hot water circulation heating system according to a fourteenth aspect of the invention is the hot water circulation heating system according to any of the eleventh to thirteenth aspects of the invention, wherein the building window is a triple window. The window frame radiator is formed in three window frames of a triple window.

  Here, the windows of the building are triple windows, and window frame radiators are formed on all three window frames of the triple windows. Thereby, the air layer sandwiched between the triple windows and the air in the vicinity of the inside and the outside of the triple window can be warmed, and the heat in the room can be made difficult to escape.

  A hot water circulation heating system according to a fifteenth aspect of the present invention is the hot water circulation heating system according to any of the eleventh to thirteenth aspects of the invention, wherein the building window is a triple window. The window frame radiator is formed in the central window frame of the triple window.

  Here, the window of the building is a triple window, and a window frame radiator is formed on the window frame with respect to the central window of the triple window. Thereby, the air layer of the part pinched | interposed with the center window and other windows can be warmed, and it can be made difficult to escape the heat | fever in a living room.

  A hot water circulation heating system according to a sixteenth aspect of the present invention is the hot water circulation heating system according to any one of the first to fifteenth aspects of the invention, wherein the heat pump is a refrigerant containing a chlorofluorocarbon refrigerant (for example, HFC134a, R407C, R410A, etc.) and carbon dioxide. And

  Until now, fluorocarbon (fluorocarbon refrigerant) has been widely used as a medium (refrigerant) for carrying heat energy in the refrigeration cycle in heat pumps, but in the future, in addition to that, carbon dioxide will tend to be used as a refrigerant. ing. However, in general, when carbon dioxide is used as a refrigerant, a drop in thermal efficiency becomes more severe when the temperature before heating of the heating target is relatively higher than when fluorocarbon is used as a refrigerant. Here, there is a difference depending on the outside air conditions and the temperature of hot water after heating. For example, when the temperature of hot water before heating is about 50 ° C., compared with refrigerants called R407C and R410A which are one of hydrochlorofluorocarbons, When carbon dioxide is used as a refrigerant, the thermal efficiency (COP) may drop by nearly half. Therefore, the first to sixth inventions are particularly useful in a hot water circulation heating system that employs a heat pump using carbon dioxide as a refrigerant.

  A hot water circulation heating system according to a seventeenth aspect of the present invention is the hot water circulation heating system according to any one of the first to fifteenth aspects of the invention, wherein the heat pump uses a fluorocarbon refrigerant as the refrigerant. The CFC refrigerant is, for example, a refrigerant called R410A, a refrigerant called R407C, a refrigerant called R32, or the like, which is an HFC refrigerant.

  A hot water circulation heating system according to an eighteenth invention is the hot water circulation heating system according to any one of the first to fifteenth inventions, wherein the heat pump uses a refrigerant having a GWP of 200 or less as a refrigerant. GWP is a global warming potential (Global Warming Potential), and indicates the effect of warming that greenhouse gases have over 100 years on the basis of carbon dioxide.

  A hot water circulation heating system according to a nineteenth invention is the hot water circulation heating system according to any one of the first to fifteenth inventions, wherein the heat pump uses an HC refrigerant that is a natural refrigerant as a refrigerant. The HC refrigerant that is a natural refrigerant is, for example, propane or butane.

  According to the first and seventh to eleventh inventions, the heat pump can be operated with high thermal efficiency, and energy saving can be achieved.

  According to the 2nd-4th invention, the temperature of the warm water which returns to a tank naturally can be lowered | hung.

  According to the fifth and sixth inventions, the function of the radiator in the toilet for lowering the temperature of the hot water returning to the tank is further enhanced.

  According to the twelfth and thirteenth inventions, since the inflow amount of hot water can be adjusted for each window frame radiator, the temperature of the living room can be adjusted efficiently, and the temperature of the hot water that effectively returns to the tank is lowered. be able to.

  According to the fourteenth to fifteenth inventions, the air in the vicinity of the triple window can be warmed, and the heat in the room can be made difficult to escape.

(First embodiment)
<Main configuration of hot water circulation heating system>
The structure of the hot water circulation heating system which concerns on 1st Embodiment of this invention is shown in FIGS. 1-3. The hot water circulation heating system is a system that circulates hot water in a building and performs heating and has a hot water supply function. The hot water is stored in a tank 40, indoor radiators 61a and 62a, and radiators 69b, 69c, and 69e in a toilet. A circulation pump 51 for indoor heating, a vapor compression heat pump 10 for heating hot water, a circulation pump 25 for heating hot water, a heat exchanger 41 for hot water supply, a heating water spraying device 75, and the control unit 20 And.

  The indoor radiators 61 a and 62 a are arranged in the living rooms 61 and 62 of the building and dissipate the heat of the hot water to the indoor air of the living rooms 61 and 62.

  The radiators 69b, 69c, and 69e in the toilet are disposed in the toilet 69 of the building, and radiate the heat of the hot water in the toilet 69.

  The indoor heating circulation pump 51 allows hot water to flow from the tank 40 to the indoor radiators 61a and 62a and the radiators 69b, 69c and 69e in the toilet, and the indoor radiators 61a and 62a and the radiators 69b, 69c and 69e in the toilet. The heated hot water is returned to the tank 40 again. The hot water that has left the tank 40 flows through the in-room radiators 61 a and 62 a, then flows through the in-toilet radiators 69 b, 69 c, and 69 e and returns to the tank 40.

  The heat pump 10 includes a compressor 11, a radiator 12, an expansion valve 13, and an evaporator 14, takes heat from the outside air by the evaporator 14, and heats hot water flowing from the tank 40 by heat released from the radiator 12. To do.

  The hot water heating circulation pump 25 allows hot water to flow from the tank 40 to the radiator 12 of the heat pump 10, and returns the hot water from the radiator 12 of the heat pump 10 to the tank 40 again.

  The hot water supply heat exchanger 41 is disposed in the tank 40, exchanges heat between the water taken from the water supply source and the hot water in the tank 40, heats the water, and supplies it to the hot water supply pipe 72 of the building. The water heated by the hot water supply heat exchanger 41 and supplied to the hot water supply pipe 72 is hereinafter referred to as heated water. In addition, the water taken in from the water supply source and supplied to the hot water supply pipe 72 and the hot water in the tank 40 do not mix with each other.

  The heated water spraying device 75 is a device that sprays the heated water supplied from the hot water supply heat exchanger 41 to the hot water supply pipe 72 to the outer surface of the evaporator 14 of the heat pump 10.

The hot water stored in the tank 40 and circulated through the closed loop by the indoor heating circulation pump 51 and the hot water heating circulation pump 25 is normal water here, but it may be liquid and is not necessarily water. (H ₂ O) may not be used. If there is a liquid that can reduce the power of the indoor heating circulation pump 51 and the hot water heating circulation pump 25 and can reduce the size of the piping 52, 31 and the like serving as a circulation route smaller than water (H ₂ O), It is desirable to use a liquid.

<Overview of hot water circulation heating system>
In the hot water circulation heating system, the hot water flowing from the tank 40 to the radiator 12 of the heat pump 10 by the operation of the hot water heating circulation pump 25 is heated using the heat released from the radiator 12 by the operation of the heat pump 10. As a result, high-temperature hot water of about 70 ° C. is returned from the heat pump 10 to the tank 40. On the other hand, the hot water in the tank 40 is sent to the indoor radiators 61 a and 62 a in the living rooms 61 and 62 and the radiators 69 b, 69 c and 69 e in the toilet 69 by the operation of the circulation pump 51 for indoor heating. The heat of the hot water moves around the indoor air of the living rooms 61 and 62 and the radiators 69b, 69c, and 69e in the toilet, and the living rooms 61 and 62 are heated. In the toilet 69, the washing water in the toilet tank 69a and the toilet seat 69d Etc. are warmed. Then, the hot water whose temperature has dropped to about 10 ° C. to 20 ° C. is returned to the tank 40 again. The hot water whose temperature has been lowered is raised again by the operation of the heat pump 10.

  Thus, here, the tank 40 connected by the piping 31 and the heat pump 10 are circulated, the tank 40 connected by the piping 52, the radiators 61a and 62a in the room, the radiator 69b in the toilet, A second loop that circulates through 69c and 69e is formed, and hot water circulates through each loop. As a result, the heat collected from the outside by the operation of the heat pump 10 or the heat generated by the operation of the compressor 11 is finally passed through the hot water stored in the tank 40 and finally the room air and the toilet 69 in the living rooms 61 and 62. Will move to each part.

  In addition, a hot water supply heat exchanger 41 is provided in the tank 40, and water taken from a water supply source takes heat from the hot water in the tank 40 when passing through the hot water supply heat exchanger 41. It flows to the hot water supply pipe 72 of the building. The heated water flowing through the hot water supply pipe 72 is used in the shower 73, the bathtub 74, and the like. Further, part of the heated water that has flowed into the hot water supply pipe 72 is sprayed on the outer surface of the evaporator 14 of the heat pump 10 by the heated water spraying device 75. This spraying is periodically performed under a predetermined condition in which the evaporator 14 of the heat pump 10 is frosted.

<Detailed configuration of tank 40>
The tank 40 is installed indoors. The tank 40 is provided with a plurality of temperature sensors (thermistors) 40a to 40e for the purpose of measuring the temperature of the hot water at a plurality of different height positions. The hot water in the tank 40 naturally has a high temperature at the top and a low temperature at the bottom. The high temperature hot water heated by the heat pump 10 is returned to the vicinity of the center of the tank 40 in the height direction, as shown in FIG. Low-temperature hot water is directed to the heat pump 10 from the lower part of the tank 40. On the other hand, the hot water from the upper part or the central part of the tank 40 is directed to the indoor radiators 61a, 62a in the living rooms 61, 62, and the low-temperature hot water returned from the radiators 69b, 69c, 69e in the toilet is The tank 40 is returned to the lower part or the center part.

  The tank 40 is provided with a booster heater 42 used when the heating capacity of the heat pump 10 is insufficient, in addition to the above-described heat exchanger 41 for hot water supply. The booster heater 42 is an electric heater, and when the general controller 29 described later needs to increase the temperature of the hot water in the tank 40 and determines that the desired temperature increase of the hot water cannot be expected only by the heating capacity of the heat pump 10. The hot water in the tank 40 is heated together with the heat pump 10.

<Detailed configuration of heat pump 10>
The heat pump 10 is installed outdoors, and is connected to the compressor 11, the radiator 12, the expansion valve (electric expansion valve) 13, the evaporator 14, and the evaporator 14 that are connected by the refrigerant pipe 15 to constitute the refrigeration cycle. A fan 17 for application and a heat pump control unit 19 are provided. As the refrigerant flowing through the refrigeration cycle, the heat pump 10 employs carbon dioxide (hereinafter referred to as CO2 refrigerant). For this reason, in the heat pump 10, the CO 2 refrigerant enters a supercritical state in the radiator 12. In the refrigeration cycle, the CO2 refrigerant is compressed to a pressure exceeding the critical pressure by the compressor 11 (see the transition from the point A to the point B in FIG. 8) and cooled by the radiator 12, and the temperature gradually decreases and becomes supercritical. Transition from the state to the liquid state (see transition from point B to point C in FIG. 8), decompressed by expansion valve 13 (see transition from point C to point D in FIG. 8), and evaporation by evaporator 14 As a result, the gas is again sucked into the compressor 11 (see the transition from point D to point A in FIG. 8).

  The radiator 12 includes a heat transfer pipe connected to the pipe 31 extending from the tank 40 and a heat transfer pipe connected to the refrigerant pipe 15 and through which the CO2 refrigerant flows. One heat transfer pipe is an outer peripheral surface of the other heat transfer pipe. Wound in a spiral. Thereby, in the radiator 12, heat exchange is performed between the compressed CO2 refrigerant in a high pressure and high temperature state and the low temperature hot water flowing from the tank 40, and heat is transferred from the CO2 refrigerant to the hot water. Moves and the hot water is heated.

<Detailed configuration of indoor radiator such as radiator for heating>
As shown in FIG. 2, the interior radiators 61 a and 62 a are arranged in the interior rooms 61 and 62 of the building, and play a role of radiating the heat of the hot water flowing from the tank 40 to the indoor air of the interior rooms 61 and 62. Here, the two indoor radiators 61a and 62a are illustrated, but this is not intended to limit the quantity. Moreover, the form of the indoor radiators 61a and 62a may be arranged near the window or may be embedded under the floor. Further, the indoor radiators 61a and 62a are arranged in series here, but may be arranged in parallel.

  The toilet radiators 69b, 69c, and 69e include a toilet tank heat dissipation portion 69b, a toilet seat heat dissipation portion 69e, and a toilet radiator 69c. The toilet tank heat radiating portion 69b is provided inside a toilet tank 69a that collects wash water in the toilet 69, and dissipates heat of the hot water to the wash water in the toilet tank 69a. The toilet seat heat dissipating part 69e is provided inside the toilet seat 69d of the toilet 69, and dissipates heat of the hot water to the toilet seat 69d. The in-toilet radiator 69 c radiates the heat of the hot water to the air in the toilet 69.

  In addition, a pipe 52 that connects the tank 40, the radiators 61a and 62a in the room, and the radiators 69b, 69c, and 69e in the toilet to form a loop includes a heating / warming temperature sensor 52a, a heating / warming water return temperature sensor 52b, and a warm water flow rate adjustment Valves 53, 54 and 55 are provided.

<Detailed configuration for hot water supply function>
(Configuration related to normal hot water supply)
The hot water supply heat exchanger 41 provided in the tank 40 is a water heat exchanger using a copper pipe or a stainless steel pipe as a heat transfer pipe, and as shown in FIG. 3, a water supply pipe extending from a water supply source (water supply) 71 and a hot water supply pipe 72 for supplying hot water to the shower 73 and the bathtub 74 are connected. The water supply pipe 71 puts room temperature water into the lower end of the hot water supply heat exchanger 41. The normal temperature water that has entered the hot water supply heat exchanger 41 from the water supply pipe 71 takes heat away from the hot water in the tank 40 while moving upward, and is discharged into the hot water supply pipe 72 as heated hot water. . The water supply pipe 71 is provided with a water supply pipe temperature sensor 71a, and the hot water supply pipe 72 is provided with a hot water supply pipe temperature sensor 72a. For example, the water supply pipe temperature sensor 71a detects the temperature of tap water of 5 ° C., and the hot water supply pipe temperature sensor 72a detects the temperature of heated water of 45 ° C. The hot water supply pipe 72 is provided with a hot water supply valve (open / close operation valve) 72a which is an electromagnetic valve.

  In addition, although illustration is abbreviate | omitted, the heating water supplied to the shower 73 or the bathtub 74 is mixed with a tap water with a mixing valve, is temperature-controlled, and is sent to the shower 73 or the bathtub 74.

(Use of hot water supply for defrost)
The heated water spraying device 75 described above guides the heated water heated by the hot water supply heat exchanger 41 and supplied to the hot water supply pipe 72 toward the evaporator 14 of the outdoor heat pump 10 and sprayed on the surface of the evaporator 14. To do. The heated water spraying device 75 includes a spraying pipe 76 that branches off from the hot water supply pipe 72 and extends to the outside, a defrost valve (open / close operation valve) 77 provided in the middle of the spraying pipe 76, and a tip of the spraying pipe 76. The defrosting nozzle 78 is provided in the part and sprays heated water toward the evaporator 14. As will be described later, the heating water spraying device 75 sprays a part of the heating water toward the evaporator 14 at a predetermined cycle when it is necessary to defrost the evaporator 14. The defrost valve 77 is an electromagnetic valve similar to the hot water supply valve 72 a described above, and is opened when water spraying to the evaporator 14 is required based on a command from the general controller 29.

<Detailed configuration of control unit 20>
As shown in FIGS. 1 and 4, the integrated controller 29 controls equipment associated with the heat pump 10 and equipment associated with the tank 40 based on signals input from the outside. The general controller 29 is housed in a casing together with the three-way valves 21 and 22 and the hot water heating circulation pump 25 to form one control unit 20 (see FIG. 1).

  The three-way valves 21 and 22 draw out hot water from which part of the tank 40 in the height direction and send it out to the radiators 61a and 62a, etc., and cool low-temperature water returned from the radiators 69b, 69c and 69e in the toilet. It is provided to adjust which part of the tank 40 is returned to the height direction. These three-way valves 21 and 22 operate according to instructions from the general controller 29.

  In addition to the three-way valves 21 and 22, the general controller 29 includes a booster heater 42, a heat pump control unit 19, a circulation pump 51 for indoor heating, a circulation pump 25 for hot water heating, a warm water flow rate adjustment valve 53 to 55, a defrost valve 77, etc. To control. The general controller 29 receives a measurement result signal from the heating / warming water temperature sensor 52a, the heating / warming water return temperature sensor 52b, the temperature sensors 40a to 40e of the tank 40, the water supply pipe temperature sensor 71a, the hot water supply pipe temperature sensor 72a, and the like. The remote controller / thermostat 91 provided in the living rooms 61 and 62 receives information on the room temperature and the room set temperature.

<About energy-saving control using body heat storage>
This hot water circulation heating system is installed in a building such as a house whose outer wall is made of a material having high heat storage properties such as bricks and stones, and an energy saving control using frame heat storage (hereinafter referred to as frame heat storage). (Used energy saving control). When using this body heat storage energy saving control, an extremely high level of energy saving operation can be performed.

  FIG. 5 and FIG. 6 show a simplified control flow of the energy storage control using the housing heat storage. Here, based on this control flow, the energy saving control using the frame heat storage will be described.

  In step S11, first, it is determined whether the heating / warming water return temperature Tin, which is a measurement value of the heating / warming water return temperature sensor 52b, is higher than the first set temperature T1. The first set temperature T1 can be determined based on the temperature of tap water or the like, but is set to 20 ° C., for example. If “No” is determined in step S11, the process does not proceed to step S12 and thereafter. This is because it is determined that the hot water whose temperature has been sufficiently lowered has returned to the tank 40 and the heat efficiency of the heat pump 10 can be kept high. If “Yes” is determined in step S11, the process proceeds to step S12.

  In step S12, it is determined whether the room temperature Trm received from the remote controller / thermostat 91 is higher than the second set temperature T2. The second set temperature T2 is set to a temperature slightly higher than the room set temperature by the user receiving from the remote controller / thermostat 91, for example. If “No” is determined in step S12, the process returns to step S11 without proceeding to step S13 and subsequent steps. This is because if the capacity of the heat pump 10 is reduced when the room temperature is lower than the user's set temperature, the room temperature is further lowered. If “Yes” is determined in step S12, the process proceeds to step S13.

  In step S13, it is determined whether the compressor 11 of the heat pump 10 is an inverter compressor or a constant speed compressor. In the case of an inverter compressor, the process proceeds to step S14, and the frequency of the inverter is set to the lowest settable frequency. On the other hand, in the case of a constant speed compressor, the process proceeds to step S15 and the operation of the compressor 11 is stopped. Further, following Steps S14 and S15, in Step S16, the opening degree of the hot water flow rate adjusting valve 53 is reduced to circulate between the tank 40 and the indoor radiators 61a and 62a and the radiators 69b, 69c and 69e in the toilet. Reduce the amount of hot water for heating to zero or close to zero. By reducing the circulation amount in this way, the amount of energy consumed by the compressor 11 is reduced. However, since the amount of hot water sent from the tank 40 to the indoor radiators 61a and 62a is also reduced, the temperature of the hot water in the tank 40 does not decrease so much. Moreover, if it is a building with high heat storage property, once the inside of the building including the frame is warmed, even if the capacity of the heat pump 10 is reduced, the warmth can be maintained for a while.

  After step S16, the process proceeds to step S17. In step S17, it is determined whether the room temperature Trm is lower than the third set temperature T3. The third set temperature T3 is lower than the second set temperature T2, and is normally set to a temperature slightly lower than the indoor set temperature by the user who is receiving from the remote controller / thermostat 91. If “No” is determined in step S16, the process does not proceed to the next step S18. This is because the warmth in the building can be maintained by the heat accumulated in the housing without increasing the capacity of the heat pump 10.

  If “Yes” is determined in step S17, a timer is started in step S18, and the process proceeds to step S19. In step S19, it is determined whether the room temperature Trm is higher than the third set temperature. If “Yes” is determined in step S19, the process returns to step S17. If it is determined as “No” in step S19, the process proceeds to step S20, and it is determined whether a fixed time has elapsed after the timer is started. If “No” is determined in step S20, the process returns to step S19. After step S17, if the room temperature Trm is again higher than the third set temperature T3, there is no need to increase the capacity of the heat pump 10, and the room temperature Trm continues for a predetermined time and is lower than the third set temperature T3. Since it is desired to increase the capacity of the heat pump 10 only in such a case, the processes in steps S18 to S20 are performed.

  If the room temperature Trm is lower than the third set temperature T3 for a certain period of time, “Yes” is determined in step S20, and the process proceeds to step S21. In step S21, the process performed in step S14 or step S15 and step S16 is canceled. That is, in step S21, when the compressor 11 is a constant speed compressor, the operation of the compressor 11 is resumed, and when the compressor 11 is an inverter compressor, the frequency of the compressor 11 is subjected to normal control. The processing of step S14 that has been set to the lowest settable frequency is canceled. In step S21, the opening degree of the hot water flow rate adjustment valve 53 is increased. As a result, the room temperature Trm, which has been lower than the third set temperature T3, gradually increases.

<About defrosting operation of heat pump 10>
As described above, the heating water spraying device 75 removes the heat of the hot water in the tank 40 by the hot water supply heat exchanger 41 and supplies the heated water supplied to the hot water supply pipe 72 to the evaporator 14 of the outdoor heat pump 10. To the surface of the evaporator 14. This spraying is performed at a predetermined cycle by opening and closing the defrost valve 77 according to an instruction from the general controller 29 that transmits and receives signals to and from the heat pump control unit 19 when defrosting of the evaporator 14 is necessary. Thereby, the frost attached to the evaporator 14 is melted, and the thermal efficiency of the heat pump 10 is improved.

  In addition, about the idea when defrosting is required, it is the same as the idea in the refrigerating cycle which uses the conventional fluorocarbon as a refrigerant | coolant.

<Characteristics of the hot water circulation heating system according to the first embodiment>
(1)
In this system, the hot water in the tank 40 is led to the heat pump 10 by the hot water heating circulation pump 25, and the hot water heated by the heat pump 10 is returned to the tank 40 again. The heat pump 10 is outdoors and the tank 40 is indoors. It is installed. For this reason, the tank 40 is not exposed to the cold outdoor air, the temperature drop of the hot water in the tank 40 is suppressed, and the heat pump 10 can pump up heat from the outdoor air (outside air). Therefore, in this system, a large amount of high-temperature hot water can be efficiently secured in the tank 40.

(2)
In this system, each device attached to the heat pump 10 and the tank 40 (three-way valves 21, 22, booster heater 42, heat pump control unit 19, compressor 11, expansion valve 13, circulation pump 51 for indoor heating, circulation pump for hot water heating) 25, warm water flow rate adjustment valves 53 to 55, defrost valve 77, etc.) received from the remote controller / thermostat 91 provided in the living rooms 61, 62, etc., information on the indoor temperature and the indoor set temperature, the temperature sensor 40a of the tank 40 The general controller 29 controls based on information from ˜40e. Thereby, the heat pump 10 can be optimally operated.

(3)
When the room temperature of the living rooms 61, 62 and the like rises, the building temperature of the building also rises, and the room temperature of the living rooms 61, 62 can be maintained even if the capacity of the hot water circulation heating system is reduced.

  In view of this, when the compressor 11 is a constant speed compressor, in this system, as shown in the control flow of FIGS. 5 and 6, the temperature of the hot water returning from the indoor radiators 61 a and 62 a to the tank 40. When Tin is higher than the first set temperature T1 and the room temperature Trm of the living rooms 61 and 62 is higher than the second set temperature T2, the compressor 11 is stopped and the operation of the heat pump 10 is stopped. . Thereby, energy saving can be achieved. Further, if the operation of the heat pump 10 is stopped, the room temperature Trm of the living rooms 61 and 62 gradually decreases even if there is heat storage in the housing. Therefore, the room temperature Trm keeps the third set temperature T3 for a certain time. When continuously falling, the operation of the compressor 11 of the heat pump 10 is resumed. Thereby, it is possible to prevent the room temperature Trm of the living rooms 61 and 62 from being excessively lowered while saving energy.

  Similarly, when the compressor 11 is an inverter compressor, in this system, as shown in the control flow of FIGS. 5 and 6, the temperature Tin of the hot water returning from the indoor radiators 61a and 62a to the tank 40 is When the room temperature Trm of the living rooms 61 and 62 is higher than the first set temperature T1 and higher than the second set temperature T2, the frequency of the inverter of the compressor 11 is set to the lowest settable frequency and the heat pump I try to drop 10 abilities. Thereby, energy saving can be achieved. Further, if the capacity of the heat pump 10 is kept low, the room temperature Trm of the living rooms 61 and 62 gradually decreases even if heat is stored in the housing. Therefore, the room temperature Trm keeps the third set temperature T3 constant. When the time continuously falls below, the frequency of the inverter of the compressor 11 is returned to the state according to the normal control. Thereby, it is possible to prevent the room temperature Trm of the living rooms 61 and 62 from being excessively lowered while saving energy.

  The feature of the present system described above is particularly effective in a building such as a house having a large amount of heat storage in a housing that is difficult to cool once heated.

(4)
As a characteristic of the heat pump, generally, the heat efficiency of the heat pump is improved as the temperature change range of the heating target is wider. When this is applied to the present system, for example, with respect to the hot water in the tank 40, the heat efficiency of the heat pump 10 when heating the hot water of 10 ° C. to 70 ° C. is higher than the thermal efficiency of the heat pump 10 when heating the hot water of 40 ° C. to 70 ° C. The thermal efficiency is considerably higher (see FIGS. 7 and 8).

  As shown in FIG. 7, when heating 40 ° C. hot water to 70 ° C., H3 corresponding to the amount taken from outside air by the evaporator 14 is relatively smaller than H1 corresponding to the work amount of the compressor 11. Compared to the small value, as shown in FIG. 8, when 10 ° C. hot water is heated to 70 ° C., the evaporator 14 generates H 1 corresponding to the work amount of the compressor 11 from the outside air. H2 corresponding to the amount taken in is a relatively large value. In the former case, considering the power generation efficiency when generating electric energy to be supplied to the compressor 11, only heat less than 1.0 times the consumed energy is generated. In the latter case, 1. It generates 2 to 1.4 times as much heat.

  Thus, in the heat pump of the present system that employs a CO 2 refrigerant, reducing the temperature of the hot water flowing from the tank 40 to the radiator 12 greatly contributes to the improvement of thermal efficiency. It will be.

  In view of this, in the present system, a radiator (non-toilet radiator 69b, 69c, 69e) is also provided in the toilet 69 that is not a living room, and after the hot water that has exited the tank 40 flows through the indoor radiators 61a, 62a, At least one of the radiators 69b, 69c, 69e in the toilet is configured to flow. Thereby, for example, the warm water that enters the indoor radiators 61a and 62a at 70 ° C. and exits the indoor radiators 61a and 62a at 40 ° C. decreases the temperature by passing through the radiators 69b, 69c, and 69e in the toilet, and the tank 40 For example, when the temperature returns to 10 ° C., the temperature drops to 10 ° C. That is, the temperature of the warm water returning to the tank 40 becomes very small, and the heat pump 10 that heats the warm water from that temperature to 70 ° C., for example, can heat the warm water with very high thermal efficiency.

  Moreover, in this system, the electric heater in the toilet 69 etc. which were conventionally installed separately from the heating system can be omitted. Further, since the heating work in the toilet 69 is handled by the heat pump 10 having higher thermal efficiency than the electric heater, further energy saving can be achieved.

  The toilet radiators 69b, 69c and 69e are not only the toilet radiator 69c but also the toilet tank heat dissipating part 69b provided in the toilet tank 69a for storing the wash water, and the toilet seat provided in the toilet seat 69d. Since the heat dissipating part 69e is provided and the device is designed to promote the decrease in the temperature of the hot water, the temperature of the hot water that inevitably returns to the tank 40 is very small.

(5)
In view of the characteristics of the heat pump that the thermal efficiency is improved as the temperature change range of the heating target is wider, this system further adopts a configuration in which a hot water supply heat exchanger 41 is installed in the tank 40. This eliminates the need for a separate water heater such as a gas water heater, and the heat pump 10 maintains high thermal efficiency.

  That is, in the present system, the heat of hot water stored in the tank 40 is deprived for heating to the indoor radiators 61a and 62a of the living rooms 61 and 62, and the heat is used for hot water supply. Specifically, a hot water supply heat exchanger 41 is installed in the tank 40, and the heat from the hot water in the tank 40 is taken away when water from the water supply source passes through the hot water supply heat exchanger 41. . Thereby, the temperature of the hot water in the tank 40 falls, and the heat pump 10 that heats the hot water from that temperature to, for example, 70 ° C. can heat the hot water with very high thermal efficiency.

(6)
Further, in this system, a part of the heated water discharged (supplied) from the hot water supply heat exchanger 41 in the tank 40 to the hot water supply pipe 72 is used to heat the evaporator 14 of the heat pump 10 by the heated water spraying device 75. A configuration in which heated water is sprayed on the outer surface is adopted. Since the heating water is at least 40 ° C. or higher, frost attached to the evaporator 14 can be melted.

  Thus, since the defrosting of the evaporator 14 is performed by the heated water generated using the heat in the tank 40, the evaporator 14 is operated as a radiator by reversing the refrigeration cycle as in the prior art. The defrosting operation is not performed and the heat efficiency of the heat pump 10 is not deteriorated, or the frost attached to the evaporator 14 is melted by another electric heater or the like and the electric consumption is not increased. For this reason, further energy saving can be achieved in this system.

  When defrosting of the evaporator 14 is not required, the general controller 29 does not issue an instruction for spraying heated water. For this reason, the heat of the hot water in the tank 40 is not wasted.

<Modification>
(A)
In the above hot water circulation heating system, a radiator (toilet radiators 69b, 69c, 69e) is also provided in the toilet 69 which is not a room, and after the warm water flowing out of the tank 40 flows through the indoor radiators 61a, 62a, Although it is configured to flow through at least one of the radiators 69b, 69c, 69e in the toilet, the heat pump 10 can be operated with high thermal efficiency even if the following configuration is adopted instead of this configuration.

  Here, as shown in FIG. 9, the hot water that has exited the tank 40 flows through the indoor radiators 61 a and 62 a, then flows through the window frame radiators 61 b and 62 b, and is then returned to the tank 40 from the indoor hot water. A circulation path is formed. The window frame radiators 61b and 62b are formed on the window frames of the windows 65 and 66 of the building, and heat of the hot water is transferred to the air in the vicinity of the windows 65 and 66 (the air on the indoor side of the windows 65 and 66 and the windows 65 and 66). The air on the outdoor side). The window frame radiators 61b and 62b may be pipes housed inside the window frame, or may be the window frame itself that serves both for holding the glass window and for the flow of hot water. Other configurations of the hot water circulation heating system are the same as those described above with reference to FIGS. 1, 3, and 4.

  Also in this hot water circulation heating system, the hot water in the tank 40 is heated by the operation of the heat pump 10, and the hot water is heated by the operation of the indoor heating circulation pump 51 in the indoor radiators 61a and 62a and the window frame heat radiation. To the devices 61b and 62b. Then, the heat of the hot water moves to the room air in the rooms 61 and 62 and the air around the window frame radiators 61b and 62b, and the rooms 61 and 62 are heated. Then, the hot water whose temperature has decreased returns to the tank 40 again. The hot water whose temperature has been lowered is raised again by the operation of the heat pump 10.

  Then, window frame radiators 61b and 62b are installed in the window frames of the windows 65 and 66 of the building so that the hot water flowing out of the tank 40 flows through the indoor radiators 61a and 62a and then flows through the window frame radiators 61b and 62b. Therefore, for example, the hot water that enters the indoor radiators 61a and 62a at 70 ° C. and exits the indoor radiators 61a and 62a at 40 ° C. further reduces the temperature by passing through the window frame radiators 61b and 62b. When returning to the tank 40, the temperature drops to 10 ° C., for example. Then, the temperature of the warm water returning to the tank 40 becomes very small, and the heat pump 10 that heats the warm water from that temperature to, for example, 70 ° C. can heat the warm water with very high thermal efficiency.

  Further, in the case of this system, the temperature of the cold air that has conventionally come down from the windows 65 and 66 is alleviated by the heat released from the window frame radiators 61b and 62b, and the temperature drop in the living rooms 61 and 62 is suppressed. And a useful effect that temperature deviation in each part in the living rooms 61 and 62 is suppressed can be obtained.

(B)
In the above hot water circulation heating system, a radiator (toilet radiators 69b, 69c, 69e) is also provided in the toilet 69 which is not a room, and after the warm water flowing out of the tank 40 flows through the indoor radiators 61a, 62a, Although it is configured to flow through at least one of the radiators 69b, 69c, 69e in the toilet, the heat pump 10 can be operated with high thermal efficiency even if the following configuration is adopted instead of this configuration.

  Here, as shown in FIG. 10, the hot water that has exited the tank 40 flows through the indoor radiators 61 a and 62 a, then flows through the air supply unit radiators 61 c and 62 c, and is then returned to the tank 40 from the indoor unit. A hot water circulation path is formed. The air supply unit radiators 61c and 62c are formed in the air supply units 81 and 82 provided in the living rooms 61 and 62, and radiate the heat of the hot water to the outside air supply taken in by the air supply units 71 and 72. The air supply unit radiators 61c and 62c may be pipes housed inside the air supply units 81 and 82, or the outside air supply from the air supply units 81 and 82 to the rooms 61 and 62 as shown in FIG. It may be a heat exchanger that radiates heat into the ducts 83 and 84 that guide the air. Other configurations of the hot water circulation heating system are the same as those described above with reference to FIGS. 1, 3, and 4.

  Also in this hot water circulation heating system, the hot water in the tank 40 is heated by the operation of the heat pump 10, and this hot water is operated by the operation of the indoor heating circulation pump 51 to the indoor radiators 61a, 62a and the air supply unit in the living rooms 61, 62. It is sent to the radiators 61c and 62c. Then, the heat of the hot water moves to the room air in the rooms 61 and 62 and the outside air supply taken in from the air supply unit radiators 61c and 62c, and the rooms 61 and 62 are heated. Then, the hot water whose temperature has decreased returns to the tank 40 again. The hot water whose temperature has been lowered is raised again by the operation of the heat pump 10.

  Then, the air supply unit radiators 61c and 62c are installed in the air supply units 81 and 82 provided in the living rooms 61 and 62, and the hot water discharged from the tank 40 flows through the indoor radiators 61a and 62a. Since it is configured to flow through 61c and 62c, for example, hot water that enters the indoor radiators 61a and 62a at 70 ° C. and exits the indoor radiators 61a and 62a at 40 ° C. is supplied to the air supply unit radiators 61c and 62c. The temperature is further lowered by passing, and when returning to the tank 40, the temperature is lowered to, for example, 10 ° C. Then, the temperature of the warm water returning to the tank 40 becomes very small, and the heat pump 10 that heats the warm water from that temperature to, for example, 70 ° C. can heat the warm water with very high thermal efficiency.

  Furthermore, in the case of this system, the low-temperature outside air temperature conventionally taken from the air supply units 81 and 82 is alleviated by the heat released from the air supply unit radiators 61c and 62c, and the temperature in the living rooms 61 and 62 decreases. In addition, it is possible to obtain a useful effect of suppressing the temperature deviation and the temperature deviation in each part of the living rooms 61 and 62.

(C)
In the above hot water circulation heating system, the toilet tank 69a and the toilet seat 69d are separate, but instead of the toilet tank 69a, a toilet seat / wash tank that can store water inside the toilet seat may be used. In this case, the heat of the hot water is radiated to the wash water inside the toilet seat / wash tank. Therefore, both the toilet seat and the washing water can be heated at a time, and the heat energy can be used efficiently. Moreover, since wash water can be stored, the toilet tank 69a is unnecessary and the toilet can be made compact.

(D)
In the above hot water circulation heating system, the radiators 69b, 69c and 69e in the toilet warm the washing water in the toilet tank 69a, the toilet seat 69d, the air in the toilet, etc., but the floor in the toilet as shown in FIG. Further, a toilet floor radiator 69f may be provided to warm the floor in the toilet.

(E)
In the above hot water circulation heating system, CO2 refrigerant is used as the refrigerant of the heat pump 10, but the present invention also applies to GWP (Global) in the hot water circulation heating system using HFC-type freon refrigerants such as R410A, R407C, and R32. This method is effective both in a hot water circulation heating system using a chlorofluorocarbon refrigerant having a Warming Potential) of 200 or less and in a hot water circulation heating system using an HC natural refrigerant such as propane or butane.

(Second Embodiment)
In the modified example of the first embodiment described above, the hot water from the tank 40 is connected in series so as to flow through the window radiators 61b and 62b and return to the tank 40 after flowing through the indoor radiators 61a and 62a. However, the present invention is not limited to this, and the indoor radiators 63 a and 64 a and the window frame radiators 63 b and 64 b may be connected in parallel to the tank 40. Next, a second embodiment in which living room radiators 63a and 64a and window frame radiators 63b and 64b are connected in parallel to the tank 40 will be described.

<Main configuration of hot water circulation heating system>
The structure of the hot water circulation heating system according to the second embodiment of the present invention is shown in FIG. 1, FIG. 3, and FIG. In the hot water circulation heating system according to the second embodiment, a portion serving as a circulation route is a portion different from the first embodiment, and the other portions have the same configuration. FIG. 12 is a diagram showing a portion of the circulation route in the second embodiment corresponding to FIG. 2 which is a portion of the circulation route in the first embodiment.

  The hot water circulation heating system is a system that circulates hot water in a building and has a hot water supply function, and has a tank 40 for storing hot water, indoor radiators 63a and 64a, window frame radiators 63b and 64b, A circulation pump 51 for indoor heating, a vapor compression heat pump 10 for heating hot water, a circulation pump 25 for heating hot water, a heat exchanger 41 for hot water supply, a heating water spraying device 75, and a control unit 20 I have.

  The indoor radiators 63a and 64a are arranged in the living rooms 63 and 64 of the building, and dissipate the heat of the hot water to the indoor air of the living rooms 63 and 64.

  The window frame radiators 63b and 64b are formed on the window frames of the windows 67 and 68 of the building, and heat of the hot water is transferred to the air in the vicinity of the windows 67 and 68 (the air on the indoor side of the windows 67 and 68 and the windows 67 and 68). The air on the outdoor side).

  The indoor heating circulation pump 51 circulates hot water from the tank 40 to the indoor radiators 63a and 64a and the window frame radiators 63b and 64b, and radiates heat using the indoor radiators 63a and 64a and the window frame radiators 63b and 64b. The warm water is returned to the tank 40 again.

  The heat pump 10 includes a compressor 11, a radiator 12, an expansion valve 13, and an evaporator 14, takes heat from the outside air by the evaporator 14, and heats hot water flowing from the tank 40 by heat released from the radiator 12. To do.

  Since the heat pump 10, the hot water heating circulation pump 25, and the heated water spraying device 75 have the same configuration as in the first embodiment, the description thereof is omitted.

<Overview of hot water circulation heating system>
In the hot water circulation heating system, the hot water flowing from the tank 40 to the radiator 12 of the heat pump 10 by the operation of the hot water heating circulation pump 25 is heated using the heat released from the radiator 12 by the operation of the heat pump 10. As a result, high-temperature hot water of about 70 ° C. is returned from the heat pump 10 to the tank 40. On the other hand, the hot water in the tank 40 is sent to the indoor radiators 63a and 64a and the window frame radiators 63b and 64b in the living rooms 63 and 64 by the operation of the circulation pump 51 for indoor heating. The heat of the hot water moves to the room air in the rooms 63 and 64 and the air around the window frame radiators 63b and 64b, and the rooms 63 and 64 are heated. Then, the hot water whose temperature has dropped to about 10 ° C. to 20 ° C. is returned to the tank 40 again. The hot water whose temperature has been lowered is raised again by the operation of the heat pump 10.

  Thus, here, the tank 40 connected by the piping 31 and the heat pump 10 circulate, the tank 40 connected by the piping 52, the indoor radiators 63a and 64a, the window frame radiator 63b, 64b is formed, and hot water circulates through each loop. Thereby, the heat collected from the outdoors by the operation of the heat pump 10 or the heat generated by the operation of the compressor 11 finally moves to the indoor air of the living rooms 63 and 64 through the hot water stored in the tank 40. It will be.

  In addition, a hot water supply heat exchanger 41 is provided in the tank 40, and water taken from a water supply source takes heat from the hot water in the tank 40 when passing through the hot water supply heat exchanger 41. It flows to the hot water supply pipe 72 of the building. The heated water flowing through the hot water supply pipe 72 is used in the shower 73, the bathtub 74, and the like. Further, part of the heated water that has flowed into the hot water supply pipe 72 is sprayed on the outer surface of the evaporator 14 of the heat pump 10 by the heated water spraying device 75. This spraying is periodically performed under a predetermined condition in which the evaporator 14 of the heat pump 10 is frosted.

  Since the detailed configuration of the tank 40, the detailed configuration of the heat pump 10, and the detailed configuration related to the hot water supply function are also the same as those in the first embodiment, description thereof will be omitted.

<Detailed configuration of indoor radiator such as radiator for heating>
As shown in FIG. 12, the indoor radiators 63 a and 64 a are arranged in the living rooms 63 and 64 of the building, and play a role of radiating the heat of the hot water flowing from the tank 40 to the indoor air of the living rooms 63 and 64. Here, the two indoor radiators 63a and 64a are illustrated, but it is not intended to limit the quantity. Moreover, the form of the indoor radiators 63a and 64a may be arranged near the window or may be embedded under the floor.

  The window frame radiators 63b and 64b are formed in the window frames of the windows 67 and 68 of the building, and dissipate the heat of the hot water to the air in the vicinity of the windows 67 and 68. The window frame radiators 63b and 64b may be pipes housed inside the window frame, or may be the window frame itself that serves both for holding the glass window and for the flow path of the hot water.

  In the second embodiment, warm water is supplied to the two indoor radiators 63a and 64a and the two window frame radiators 63b and 64b. The four indoor radiators 63a, 64a, 63b, and 64b are They are connected to each other in parallel. And the radiator warm water flow rate adjustment valve 53a, 53b which adjusts the inflow amount of warm water with respect to the indoor radiator 63a, 64a is provided in the piping of the entrance side of each indoor radiator 63a, 64a. Further, window frame warm water flow rate adjusting valves 53c and 53d for adjusting the inflow amount of warm water with respect to the window frame radiators 63b and 64b are provided on the inlet side pipes of the respective window frame radiators 63b and 64b.

  On the second loop as described above, the hot water discharged from the tank 40 flows through the pipes connected to the indoor radiators 63a, 64a, 63b, and 64b and then returns to the tank 40. Yes. The piping 52 that connects the tank 40, the radiators 61a and 62a and the window frame radiators 63b and 64b to form the second loop is provided with a heating / warming water temperature sensor 52a and a heating / warming water return temperature sensor 52b. ing.

<Detailed configuration of control unit 20>
As shown in FIGS. 1 and 13, the integrated controller 29 controls devices associated with the heat pump 10 and devices associated with the tank 40 based on signals input from the outside. The general controller 29 is housed in a casing together with the three-way valves 21 and 22 and the hot water heating circulation pump 25 to form one control unit 20 (see FIG. 1).

  The three-way valves 21 and 22 draw hot water from which part of the tank 40 in the height direction and send the hot water to the indoor radiators 63a and 64a and the window frame radiators 63b and 64b, or return low-temperature hot water to the tank 40. It is provided in order to adjust which part in the height direction is returned to. These three-way valves 21 and 22 operate according to instructions from the general controller 29.

  In addition to the three-way valves 21 and 22, the general controller 29 includes a booster heater 42, a heat pump control unit 19, an indoor heating circulation pump 51, a hot water heating circulation pump 25, hot water flow rate adjustment valves 53 a to 53 d, a defrost valve 77, and the like. To control. The general controller 29 receives a measurement result signal from the heating / warming water temperature sensor 52a, the heating / warming water return temperature sensor 52b, the temperature sensors 40a to 40e of the tank 40, the water supply pipe temperature sensor 71a, the hot water supply pipe temperature sensor 72a, and the like. Information on room temperature and room set temperature is received from remote controllers / thermostats 92 and 93 provided in the living rooms 63 and 64.

<About energy-saving control (multi-type) using frame heat storage>
This hot water circulation heating system is installed in a building such as a house whose outer wall is made of a material having high heat storage properties such as bricks and stones, and an energy saving control using frame heat storage (hereinafter referred to as frame heat storage). (Used energy saving control). When using this body heat storage energy saving control, an extremely high level of energy saving operation can be performed. In the second embodiment, indoor radiators 63a and 64a, which are indoor radiators, and window frame radiators 63b and 64b are connected in parallel to each other. For this reason, the flow rate of the warm water which flows into each indoor radiator 63a, 64a, 63b, 64b is adjusted according to the change of the room temperature of the living room 63 and the living room 64, a usage condition, etc., and several indoor heat radiation connected mutually in parallel. Multi-type housing heat storage use energy saving control is possible, which controls the housing 63a, 64a, 63b, 64b using housing heat storage energy saving. In the second embodiment, the living rooms 63 and 64 can be heated, and the indoor radiators 63a and 64a always function when the indoor radiators function in the living rooms 63 and 64, respectively. 63b, 64b functions as an auxiliary to the indoor radiators 63a, 64a. That is, the window frame radiators 63b and 64b function only when the indoor radiator 63a functions. In the second embodiment, each indoor radiator 63a, 63b, 64a, 64b can be controlled in units of living rooms 63, 64.

  14-22 show a simplified control flow of energy saving control using multi-type housing heat storage. Here, based on this control flow, the multi-type housing heat storage use energy saving control will be described.

  In step S31, first, it is determined whether each room temperature Trm1 received from the remote controller / thermostat 92 in the living room 63 is higher than the fourth set temperature T4. For example, the fourth set temperature T4 is set to a temperature slightly higher than the room set temperature of the living room 63 received by the user from the remote controller / thermostat 92. If “Yes” is determined in step S31, the process proceeds to step S32. If “No” is determined in step S31, the process proceeds to step S33.

  In step S32, it is determined whether each room temperature Trm2 received from the remote controller / thermostat 93 in the living room 64 is higher than the fifth set temperature T5. For example, the fifth set temperature T5 is set to a temperature slightly higher than the room set temperature of the living room 63 received by the user from the remote controller / thermostat 93, similarly to the fourth set temperature T4. If “Yes” is determined in step S32, the process proceeds to step S41. If “No” is determined in step S32, the process proceeds to step S51. Steps S41 and S51 will be described later.

  In step S33, it is determined whether each room temperature Trm2 received from the remote controller / thermostat 93 in the living room 64 is higher than the fifth set temperature T5. If “Yes” is determined in step S33, the process proceeds to step S61. If “No” is determined in step S33, the process proceeds to step S71. Steps S61 and S71 will be described later.

  As a result of steps S31 to S33, both the room temperature Trm1 and the room temperature Trm2 are too high (after step S41), only the room temperature Trm1 is too high (after step S51), and only the room temperature Trm2 is too high ( Steps S61 and later) and the room temperature Trm1 and the room temperature Trm2 are classified into four patterns when both are not high (after step S71). Each will be described below.

(When both indoor temperature Trm1 and Trm2 are too high)
The case where “Yes” is determined in step S32 (see C in FIG. 14) will be described with reference to FIGS.

  In step S41, it is determined whether the heating / warming water return temperature Tin, which is a measurement value of the heating / warming water return temperature sensor 52b, is higher than the sixth set temperature T6. The sixth set temperature T6 can be determined based on the temperature of tap water or the like, but is set to 20 ° C., for example. If “No” is determined in step S41, the process returns to step S31 without proceeding to step S42 and subsequent steps. This is because it is determined that the hot water whose temperature has been sufficiently lowered has returned to the tank 40 and the heat efficiency of the heat pump 10 can be kept high. If “Yes” is determined in step S41, the process proceeds to step S42.

  In step S42, it is determined whether the compressor 11 of the heat pump 10 is an inverter compressor or a constant speed compressor. In the case of an inverter compressor, the process proceeds to step S43, and the frequency of the inverter is set to the lowest settable frequency. On the other hand, in the case of a constant speed compressor, the process proceeds to step S44, and the operation of the compressor 11 is stopped. Furthermore, following step S43, S44, in step S45, the opening degree of each warm water flow rate adjustment valve 53a-53d is made small, and between the tank 40 and the indoor radiators 63a, 64a and the window frame radiators 63b, 64b. Reduce the amount of hot water used for circulating heating to zero or close to zero. By reducing the circulation amount in this way, the amount of energy consumed by the compressor 11 is reduced. However, since the amount of hot water sent from the tank 40 to the indoor radiators 63a and 64a is also reduced, the temperature of the hot water in the tank 40 does not decrease so much. Moreover, if it is a building with high heat storage property, once the inside of the building including the frame is warmed, even if the capacity of the heat pump 10 is reduced, the warmth can be maintained for a while.

  After step S45, the process proceeds to step S46. In step S46, it is determined whether or not the room temperature Trm1 is not lower than the seventh set temperature T7 or the room temperature Trm2 is not lower than the eighth set temperature T8. Here, the seventh set temperature T7 is a temperature lower than the fourth set temperature T4, and is usually set to a temperature slightly lower than the room set temperature of the living room 63 received by the user from the remote controller / thermostat 92. . The eighth set temperature T8 is a temperature lower than the fifth set temperature T5, and is normally set to a temperature slightly lower than the room set temperature of the living room 64 received by the user from the remote controller / thermostat 93. If “No” is determined in step S46, the process does not proceed to the next step S47. This is because the warmth in the building can be maintained by the heat accumulated in the housing without increasing the capacity of the heat pump 10.

  If “Yes” is determined in step S46, a timer is started in step S47, and the process proceeds to step S48. In step S48, it is determined whether the room temperature Trm1 is higher than the seventh set temperature T7 and the room temperature Trm2 is higher than the eighth set temperature T8. If “Yes” is determined in step S48, the process returns to step S46. If "No" is determined in step S48, the process proceeds to step S49, and it is determined whether a certain time has elapsed after the timer is started. If “No” is determined in step S49, the process returns to step S48. After step S46, if the room temperature Trm1 is again higher than the seventh set temperature T7 and the room temperature Trm2 is higher than the eighth set temperature T8, it is not necessary to increase the capacity of the heat pump 10, and the room temperature Trm1 Is desired to increase the capacity of the heat pump 10 only when the temperature is lower than the seventh set temperature T7 for a certain period of time or when the room temperature Trm2 is lower than the eighth set temperature T8 for a certain period of time. Therefore, the processing of these steps S47 to S49 is performed.

  If the room temperature Trm1 is lower than the seventh set temperature T7 or the room temperature Trm2 is lower than the eighth set temperature T8 for a predetermined time, “Yes” is determined in step S49, and the step Proceed to S50. In step S50, the process performed in step S43 or step S44 and step S45 is canceled. That is, in step S50, the opening degree of each hot water flow rate adjustment valve 53a to 53d is increased. As a result, the room temperature Trm1 that has become lower than the seventh set temperature T7 or the room temperature Trm2 that has become lower than the eighth set temperature T8 gradually increases.

(When only room temperature Trm1 is too high)
The case where “No” is determined in step S32 (see D in FIG. 14) will be described with reference to FIGS.

  In step S51, it is determined whether or not the room temperature Trm2 exceeds the eighth set temperature T8. Here, it is determined whether or not the room temperature Trm2 is too lower than the temperature set by the user. If it is determined as “Yes” in step S51, it can be determined that the room temperature Trm2 is an appropriate temperature that is neither too high nor too low with respect to the temperature set by the user. Return to step S31 without proceeding. If “No” is determined in step S51, the process proceeds to step S52.

  In step S52, it is determined whether the heating / warming water return temperature Tin, which is a measurement value of the heating / warming water return temperature sensor 52b, is higher than the sixth set temperature T6. If “No” is determined in step S52, the process returns to step S31 without proceeding to step S53 and subsequent steps. This is because it is determined that the hot water whose temperature has been sufficiently lowered has returned to the tank 40 and the heat efficiency of the heat pump 10 can be kept high. If “Yes” is determined in step S52, the process proceeds to step S53.

  In step S53, the opening temperature of the radiator warm water flow rate adjustment valve 53a and the window frame warm water flow rate adjustment valve 53c is reduced, and warm water for heating circulating between the tank 40 and the indoor radiator 63a and the window frame radiator 63b. The amount of water is set to zero or close to zero so that warm water flows through the indoor radiator 64a and the window frame radiator 64b. By reducing the circulation amount in this way, the amount of energy consumed by the compressor 11 is reduced. Moreover, the heating warm water return temperature Tin can be reduced efficiently.

  After step S53, the process proceeds to step S54. In step S54, it is determined whether or not the room temperature Trm1 is not lower than the seventh set temperature T7 or the room temperature Trm2 is not higher than the fifth set temperature T5. If “No” is determined in step S54, the process does not proceed to the next step S55. This is because the interior of the living room 64 is not yet warmed or the living room 63 is sufficiently warm.

  If “Yes” is determined in step S54, a timer is started in step S55, and the process proceeds to step S56. In step S56, it is determined whether the room temperature Trm1 is higher than the seventh set temperature T7 and the room temperature Trm2 is lower than the fifth set temperature T5. If "No" is determined in step S56, the process proceeds to step S57, and it is determined whether a certain time has elapsed after the timer is started. If “No” is determined in step S57, the process returns to step S56. After step S54, if the room temperature Trm1 continues to be lower than the seventh set temperature T7 for a certain time, the room 63 needs to be heated again, and the room temperature Trm2 continues to be set for the fifth time. Since it is not necessary to preferentially heat the living room 64 if the temperature is higher than the temperature T5, these steps S55 to S57 are performed.

  If the room temperature Trm1 is lower than the seventh set temperature T7 or the room temperature Trm2 is higher than the fifth set temperature T5 for a certain period of time, “Yes” is determined in step S57. Proceed to S58. In step S58, the process performed in step S53 is cancelled. That is, in step S58, the opening degree of the radiator warm water flow rate adjustment valve 53a and the window frame warm water flow rate adjustment valve 53c is increased. As a result, the room temperature Trm1 of the living room 63 gradually increases again.

(When only the room temperature Trm2 is too high)
The case where “Yes” is determined in step S33 (see E in FIG. 14) will be described with reference to FIGS.

  In step S61, it is determined whether the room temperature Trm1 has exceeded the seventh set temperature T7. Here, it is determined whether the room temperature Trm1 is too lower than the temperature set by the user. If it is determined as “Yes” in step S61, it can be determined that the room temperature Trm1 is an appropriate temperature that is neither too high nor too low with respect to the temperature set by the user. Return to step S31 without proceeding. If “No” is determined in step S61, the process proceeds to step S62.

  In step S62, it is determined whether the heating / warming water return temperature Tin, which is a measurement value of the heating / warming water return temperature sensor 52b, is higher than the sixth set temperature T6. If “No” is determined in step S62, the process returns to step S31 without proceeding to step S63 and subsequent steps. This is because it is determined that the hot water whose temperature has been sufficiently lowered has returned to the tank 40 and the heat efficiency of the heat pump 10 can be kept high. If “Yes” is determined in step S62, the process proceeds to step S63.

  In step S63, the opening temperature of the radiator warm water flow rate adjustment valve 53b and the window frame warm water flow rate adjustment valve 53d is reduced, and the warm water for heating circulating between the tank 40 and the interior radiator 64a and the window frame radiator 64b. The amount of water is set to zero or close to zero so that hot water flows through the radiator 63a and the window frame radiator 63b. By reducing the circulation amount in this way, the amount of energy consumed by the compressor 11 is reduced. Moreover, the heating warm water return temperature Tin can be made low efficiently.

  After step S63, the process proceeds to step S64. In step S64, it is determined whether or not the room temperature Trm1 does not exceed the fourth set temperature T4 or the room temperature Trm2 does not fall below the eighth set temperature T8. If “No” is determined in step S64, the process does not proceed to the next step S65. This is because the interior of the living room 63 is not yet warmed or the living room 64 is sufficiently warm.

  If “Yes” is determined in step S64, a timer is started in step S65, and the process proceeds to step S66. In step S66, it is determined whether the room temperature Trm1 is lower than the fourth set temperature T4 and the room temperature Trm2 is higher than the eighth set temperature T8. If “No” is determined in step S66, the process proceeds to step S67 to determine whether a certain time has elapsed after the timer is started. If “No” is determined in step S67, the process returns to step S66. After step S64, if the room temperature Trm1 continues to be higher than the fourth set temperature T4 for a certain period of time, there is no need to preferentially heat the room 63, and the room temperature Trm2 continues for a certain period of time. Since it is necessary to heat the living room 64 again if the temperature is lower than the 8 set temperature T8, the processes in steps S65 to S67 are performed.

  When the room temperature Trm1 is higher than the fourth set temperature T4 or the room temperature Trm2 is lower than the seventh set temperature T8 for a certain period of time, “Yes” is determined in step S67, and the step Proceed to S68. In step S68, the process performed in step S63 is cancelled. That is, in step S68, the opening degree of the radiator warm water flow rate adjustment valve 53b and the window frame warm water flow rate adjustment valve 53d is increased. As a result, the room temperature Trm2 of the living room 64 gradually increases again.

(When indoor temperature Trm1 and Trm2 are both low)
The case where “No” is determined in step S33 (see F in FIG. 14) will be described with reference to FIGS.

  In step S71, it is determined whether the room temperature Trm1 is lower than the seventh set temperature T7 or whether the room temperature Trm2 is lower than the eighth set temperature T8. Here, it is determined whether the room temperature Trm1 or the room temperature Trm2 is too lower than the temperature set by the user. When it is determined as “No” in step S71, it can be determined that the room temperatures Trm1 and Trm2 are appropriate temperatures that are neither too high nor too low with respect to the temperature set by the user. The process returns to step S31 without proceeding to step S72. If “Yes” is determined in step S71, the process proceeds to step S72.

  In step S72, the amount of warm water for heating circulating between the tank 40 and the window frame radiators 63b and 64b is reduced to zero or zero by opening the window frame warm water flow rate adjusting valves 53c and 53d. The warm water is caused to flow through the indoor radiators 63a and 64a. Thus, the amount of energy consumed by the compressor 11 is reduced by reducing the circulation amount of the hot water for the window frame radiators 63b and 64b. Moreover, since warm water can be utilized for warming the air in each of the living rooms 63 and 64, the indoor temperature Trm1 and the indoor temperature Trm2 can be quickly increased.

  After step S72, the process proceeds to step S73. In step S73, it is determined whether or not the room temperature Trm1 does not exceed the fourth set temperature T4 or the room temperature Trm2 does not exceed the fifth set temperature T5. If “No” is determined in step S73, the process does not proceed to the next step S74. This is because the living room 63 or the living room 64 has not yet been warmed.

  If “Yes” is determined in step S73, a timer is started in step S74, and the process proceeds to step S75. In step S75, it is determined whether the room temperature Trm1 is lower than the fourth set temperature T4 and the room temperature Trm2 is lower than the fifth set temperature T5. If “No” is determined in the step S75, the process proceeds to a step S76 to determine whether or not a certain time has elapsed after the timer is started. If “No” is determined in step S76, the process returns to step S75. After step S73, if the room temperature Trm1 is higher than the fourth set temperature T4, it is not necessary to heat at least the room 63 (warm up the room air), and the room temperature Trm2 is higher than the fifth set temperature T5. If it is larger, it is not necessary to heat at least the living room 64 (warm up the room air), and therefore, the processing of these steps S74 to S76 is performed.

  In step S77, it is determined whether the heating / warming water return temperature Tin, which is a measurement value of the heating / warming water return temperature sensor 52b, is higher than the sixth set temperature T6. If “No” is determined in step S77, the process returns to step S77 without proceeding to step S78 and subsequent steps. This is because it is determined that the hot water whose temperature has been sufficiently lowered by the indoor radiators 63a and 64a has returned to the tank 40, and the heat efficiency of the heat pump 10 can be kept high.

  If “Yes” is determined in step S77, a timer is started in step S78, and the process proceeds to step S79. In step S79, it is determined whether the heating hot water return temperature Tin is lower than the sixth set temperature T6. If "No" is determined in the step S79, the process proceeds to a step S80 to determine whether a certain time has elapsed after the timer is started. If “No” is determined in step S80, the process returns to step S79. After step S77, if the heating hot water return temperature Tin is higher than the sixth set temperature T6, it is not necessary to heat all of the living room 63 or the living room 64, so the processes of steps S78 to S80 are performed. ing.

  When the heating hot water return temperature Tin is higher than the sixth set temperature for a certain period of time, “Yes” is determined in Step S80, and the process proceeds to Step S81. In step S81, the process performed in step S72 is cancelled. That is, in step S81, the opening degree of the window frame hot water flow rate adjustment valves 53c and 53d is increased. As a result, the temperature of the air in the vicinity of the windows 67 and 68 increases, and the heating hot water return temperature Tin decreases.

<Characteristics of the hot water circulation heating system according to the second embodiment>
(1)
In this system, the hot water in the tank 40 is led to the heat pump 10 by the hot water heating circulation pump 25, and the hot water heated by the heat pump 10 is returned to the tank 40 again. The heat pump 10 is outdoors and the tank 40 is indoors. It is installed. For this reason, the tank 40 is not exposed to the cold outdoor air, the temperature drop of the hot water in the tank 40 is suppressed, and the heat pump 10 can pump up heat from the outdoor air (outside air). Therefore, in this system, a large amount of high-temperature hot water can be efficiently secured in the tank 40.

(2)
In this system, each device (three-way valves 21 and 22, booster heater 42, heat pump control unit 19, compressor 11, expansion valve 13, indoor heating circulation pump 51, hot water heating circulation pump) associated with the heat pump 10 and the tank 40. 25, information on the indoor temperature and the indoor set temperature received from the remote control / thermostat 91 provided in the living rooms 63, 64, etc., the tanks, etc. Based on the information from 40 temperature sensors 40a-40e, etc., the general controller 29 controls. Thereby, the heat pump 10 can be optimally operated.

(3)
As a characteristic of the heat pump, generally, the heat efficiency of the heat pump is improved as the temperature change range of the heating target is wider. When this is applied to the present system, for example, with respect to the hot water in the tank 40, the heat efficiency of the heat pump 10 when heating the hot water of 10 ° C. to 70 ° C. is higher than the thermal efficiency of the heat pump 10 when heating the hot water of 40 ° C. to 70 ° C. The thermal efficiency is considerably higher (see FIGS. 7 and 8).

  As shown in FIG. 7, when heating 40 ° C. hot water to 70 ° C., H3 corresponding to the amount taken from outside air by the evaporator 14 is relatively smaller than H1 corresponding to the work amount of the compressor 11. Compared to the small value, as shown in FIG. 8, when 10 ° C. hot water is heated to 70 ° C., the evaporator 14 generates H 1 corresponding to the work amount of the compressor 11 from the outside air. H2 corresponding to the amount taken in is a relatively large value. In the former case, considering the power generation efficiency when generating electric energy to be supplied to the compressor 11, only heat less than 1.0 times the consumed energy is generated. In the latter case, 1. It generates 2 to 1.4 times as much heat.

  Thus, in the heat pump of the present system that employs a CO 2 refrigerant, reducing the temperature of the hot water flowing from the tank 40 to the radiator 12 greatly contributes to the improvement of thermal efficiency. It will be.

  In view of this, in this system, radiators (window frame radiators 63b and 64b) are also provided in the window frames of the building, and the hot water discharged from the tank 40 is not only the indoor radiators 63a and 64a but also at least any of them. The window frame radiators 63b and 64b are configured to flow. Thus, for example, warm water that enters the indoor radiators 63a and 64a at 70 ° C. and exits the indoor radiators 63a and 64a at 40 ° C., enters the first window frame radiator at 70 ° C., and radiates the first window frame at 5 ° C. The temperature is further lowered by mixing with the warm water exiting the vessel, compared to the case where only the indoor radiator is used, and when returning to the tank, the temperature is lowered to 20 ° C. That is, the temperature of the warm water returning to the tank 40 becomes very small, and the heat pump 10 that heats the warm water from that temperature to 70 ° C., for example, can heat the warm water with very high thermal efficiency.

  In the present system, a plurality of window frame radiators 63b and 64b are installed in a plurality of windows 67 and 68 provided for each of the living rooms 63 and 64, and each of the heat dissipations depends on the room temperature of each of the living rooms 63 and 64. The amount of warm water flowing into the chambers (in-room radiators 63a and 64a and window frame radiators 63b and 64b) can be adjusted. Adjustment of the inflow amount of warm water is performed by radiator warm water flow rate adjustment valves 53a, 53b and window frame warm water flow rate adjustment valves 53c, 53d provided on the warm water inlet side of each radiator 63a, 64a, 63b, 64b. For this reason, for example, warm water can be circulated preferentially to the indoor radiator in the room where the temperature is low, and the temperature of the warm water can be effectively lowered.

<Modification>
(1)
In the above hot water circulation heating system, the windows of the building are not particularly limited, but for example, triple windows may be used as shown in FIGS. In this case, for the three windows of the outer windows 67a and 68a, the central windows 67b and 68b, and the living room side windows 67c and 68c, the window frames are three of the outer window frame 85, the central window frame 86 and the inner window frame 87. Although two window frames are provided, the window frame radiators 63b and 64b may be formed in the central window frame 86 so as to dissipate heat to the air in the vicinity of the central windows 67b and 68b (see FIG. 23). The window frame radiators 63b and 64b are formed in all three window frames (outer window frame 85a, central window frame 86a, and inner window frame 87a), and the air layer sandwiched between the triple windows and the vicinity of the inside of the triple window and The air near the outside may be warmed (see FIG. 24).

(2)
In the above hot water circulation heating system, a room with a low indoor temperature is preferentially heated in the energy saving control using multi-type housing heat storage. For example, each room in a building having a room on the north side and a room on the south side. When heating a room, it may be controlled to preferentially heat the north side room that is less affected by sunlight and is not warmed in the daytime. The temperature difference between the north side and the south side of the building is due to the effects of solar radiation, so it is possible to circulate hot water in preference to the window frame radiator formed in the north side room where the temperature tends to be low, The temperature of warm water can be lowered effectively.

The figure which shows a part of structure of the hot water circulation heating system which concerns on 1st Embodiment of this invention. The figure which shows a part of structure of a warm water circulation heating system. The figure which shows a part of structure of a warm water circulation heating system. The control block diagram of a hot water circulation heating system. The figure which shows the flow of a frame heat storage utilization energy saving control. The figure which shows the flow of a frame heat storage utilization energy saving control. The figure (Th diagram) which shows the heat pump cycle in case the return temperature to the tank 40 of the hot water used for heating is high. The figure (Th diagram) which shows a heat pump cycle in case the return temperature to the tank 40 of the hot water provided for heating is low. The figure which shows a part of structure of the warm water circulation heating system of the modification (A) which concerns on 1st Embodiment. The figure which shows a part of structure of the hot water circulation heating system of the modification (B) which concerns on 1st Embodiment. The figure which shows a part of structure of the hot water circulation heating system of the modification (D) which concerns on 1st Embodiment. The figure which shows a part of structure of the warm water circulation heating system which concerns on 2nd Embodiment of this invention. The control block diagram of a hot water circulation heating system. The figure which shows the flow of multi-type frame heat storage utilization energy saving control. The figure which shows the flow of multi-type frame heat storage utilization energy saving control. The figure which shows the flow of multi-type frame heat storage utilization energy saving control. The figure which shows the flow of multi-type frame heat storage utilization energy saving control. The figure which shows the flow of multi-type frame heat storage utilization energy saving control. The figure which shows the flow of multi-type frame heat storage utilization energy saving control. The figure which shows the flow of multi-type frame heat storage utilization energy saving control. The figure which shows the flow of multi-type frame heat storage utilization energy saving control. The figure which shows the flow of multi-type frame heat storage utilization energy saving control. The schematic of the section of the window frame radiator of modification (A) concerning a 2nd embodiment. The schematic of the section of the window frame radiator of modification (A) concerning a 2nd embodiment.

Explanation of symbols

10 Heat pump 40 Tank 51 Circulation pump for indoor heating (circulation pump)
53a, 53b Radiator warm water flow rate adjustment valve (room warm water flow rate adjustment valve)
53c Window frame warm water flow rate adjustment valve (first window frame warm water flow rate adjustment valve)
53d Window frame warm water flow rate adjustment valve (second window frame warm water flow rate adjustment valve)
61, 62 Living room 63, 64 Living room 65, 66 Window 67, 68 Window 61a, 62a Room radiator (room radiator)
61b, 62b Window frame radiator 61c, 62c Air supply unit radiator (air supply unit radiator, heat dissipation part in duct)
63a, 64a Indoor radiator (indoor radiator)
63b Window frame radiator (first window frame radiator)
64b Window frame radiator (second window frame radiator)
69 Toilet 69b Toilet tank heat radiator (toilet radiator)
69c Toilet radiator (toilet radiator, radiator for toilet air)
69e Toilet seat radiator (toilet radiator)
69f Toilet floor radiator (toilet radiator, toilet floor radiator)
81, 82 Air supply unit 83, 84 Duct 86 Center window frame (center window frame)
85a Outside window frame (3 window frames)
86a Center window frame (3 window frames)
87a Living room side window frame (3 window frames)

Claims (19)

A hot water circulation heating system for heating by circulating hot water in a building,
A tank (40) for storing hot water;
A vapor compression heat pump (10) for heating the hot water in the tank;
A room radiator (61a, 62a) disposed in the room (61, 62) of the building and dissipating the heat of the hot water to the room air of the room;
A toilet radiator (69b, 69c, 69e, 69f) disposed in the toilet (69) of the building and radiating the heat of the hot water in the toilet;
A circulation pump (51) for flowing hot water from the tank to the indoor radiator and the radiator in the toilet, and returning the hot water radiated by the indoor radiator and the radiator in the toilet to the tank again; ,
With
After the warm water that has left the tank flows through the indoor radiator, the warm water flows through the toilet radiator and returns to the tank.
Hot water circulation heating system. The radiator in the toilet has a heat dissipating part in the toilet seat (69e) that is provided inside the toilet seat of the toilet and dissipates heat of the hot water to the toilet seat.
The hot water circulation heating system according to claim 1. The radiator in the toilet has a heat radiating part in the toilet tank (69b) that is provided inside the toilet tank that collects wash water of the toilet and dissipates heat of the hot water to the wash water in the toilet tank.
The hot water circulation heating system according to claim 1. The toilet tank is provided inside the toilet seat of the toilet,
The hot water circulation heating system according to claim 3. The radiator in the toilet further includes a toilet air radiating portion (69c) for radiating the heat of the hot water to the air in the toilet,
The hot water circulation heating system according to any one of claims 2 to 4. The radiator in the toilet further includes a toilet floor heat radiating portion (69f) for radiating the heat of the hot water to the floor in the toilet.
The hot water circulation heating system according to any one of claims 2 to 5. A hot water circulation heating system for heating by circulating hot water in a building,
A tank (40) for storing hot water;
A vapor compression heat pump (10) for heating the hot water in the tank;
A room radiator (61a, 62a) disposed in the room (61, 62) of the building and dissipating the heat of the hot water to the room air of the room;
Window frame radiators (61b, 62b) that are formed on the window frames of the windows (65, 66) of the building and dissipate the heat of hot water to the air in the vicinity of the windows;
A circulation pump (51) for flowing hot water from the tank to the indoor radiator and the window frame radiator and returning the hot water radiated by the indoor radiator and the window frame radiator to the tank again; ,
With
After the warm water that has left the tank flows through the indoor radiator, it flows through the window frame radiator and returns to the tank.
Hot water circulation heating system. The window frame radiator is a window frame itself that serves as a pipe or hot water passage housed inside the window frame.
The hot water circulation heating system according to claim 4. A hot water circulation heating system for heating by circulating hot water in a building,
A tank (40) for storing hot water;
A vapor compression heat pump (10) for heating the hot water in the tank;
A room radiator (61a, 62a) disposed in the room (61, 62) of the building and dissipating the heat of the hot water to the room air of the room;
An air supply unit radiator (61c) that is formed in an air supply unit (81, 82) that takes in outside air supply into the building and dissipates the heat of hot water from the air supply unit to the outside air supply that is taken into the living room. 62c)
A circulation pump (51) for flowing hot water from the tank to the indoor radiator and the air supply unit radiator, and returning the hot water radiated by the indoor radiator and the air supply unit radiator to the tank again. )When,
With
After the warm water that has left the tank flows through the indoor radiator, it flows through the air supply unit radiator and returns to the tank.
Hot water circulation heating system. The air supply unit radiator is provided in a duct (83, 84) that guides outside air supply from the air supply unit to the living room, and dissipates heat from the hot water to the outside air supply (61c, 62c)
The hot water circulation heating system according to claim 9. A hot water circulation heating system for heating by circulating hot water in a building,
A tank (40) for storing hot water;
A vapor compression heat pump (10) for heating the hot water in the tank;
A room radiator (63a, 64a) disposed in the room (63, 64) of the building and radiating the heat of the hot water to the room air of the room;
A warm water flow rate adjustment valve (53a, 53b) in the room that is provided on the warm water inlet side of the radiator in the room and adjusts the inflow amount of the warm water;
A first window frame radiator (63b) formed on a window frame of the window (67, 68) of the building, and dissipating heat of hot water to air in the vicinity of the window;
A first window frame warm water flow rate adjustment valve (53c) that is provided in the first window frame radiator and adjusts an inflow amount of warm water;
Hot water is allowed to flow from the tank to the indoor radiator and / or the first window frame radiator, and the hot water radiated by the indoor radiator and / or the first window frame radiator is returned to the tank. A circulating pump (51) for returning
With
Depending on the temperature of the room air in the room, the opening degree of the room warm water flow rate adjustment valve and the first window frame warm water flow rate adjustment valve is adjusted,
Hot water circulation heating system. A second window frame radiator (64b) that is formed on the window frame of the building window and dissipates heat of the hot water to the air in the vicinity of the window;
A second window frame warm water flow rate adjustment valve (53d) provided in the second window frame radiator to adjust the inflow amount of warm water;
Further comprising
Depending on the temperature of the indoor air in the room, the opening degrees of the room warm water flow rate adjustment valve, the first window frame warm water flow rate adjustment valve, and the second window frame warm water flow rate adjustment valve are adjusted,
The hot water circulation heating system according to claim 11. The first window frame radiator is formed on a window frame of a first window installed in the north of the building,
The second window frame radiator is formed on a window frame of a second window other than the first window.
The hot water circulation heating system according to claim 12. The window of the building is a triple window,
The window frame radiator is formed on three window frames (91a, 92a, 93a) of the triple window.
The hot water circulation heating system according to any one of claims 11 to 13. The window of the building is a triple window,
The window frame radiator is formed in a window frame (92) in the center of the triple window.
The hot water circulation heating system according to any one of claims 11 to 13. The heat pump uses carbon dioxide as a refrigerant.
The hot water circulation heating system according to any one of claims 1 to 15. The heat pump uses a fluorocarbon refrigerant as a refrigerant.
The hot water circulation heating system according to any one of claims 1 to 15. The heat pump uses a refrigerant having a GWP of 200 or less as a refrigerant,
The hot water circulation heating system according to any one of claims 1 to 15. The heat pump uses an HC refrigerant that is a natural refrigerant as a refrigerant.
The hot water circulation heating system according to any one of claims 1 to 15.

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