JP5528903B2 - Absorption type air conditioning and hot water supply system - Google Patents

Description

  The present invention relates to an absorption-type air-conditioning and hot-water supply system having an absorption heat pump circuit and a hot water storage tank, and in particular, by combining a solar heat collector, it is possible to reduce carbon dioxide emissions and perform highly efficient air-conditioning operation. The present invention relates to an absorption type air conditioning and hot water supply system.

  2. Description of the Related Art As a conventional heating and hot water supply apparatus, an apparatus that exhibits a large heating capacity by burning fossil fuel is known. In such a heating hot water supply apparatus of the combustion type, for example, even when operations such as hot water supply, heating, and bath heating are performed simultaneously, a sufficient amount of heat can be supplied. However, there is a problem that a large amount of carbon dioxide is generated in addition to insufficient thermal efficiency.

  As a hot water supply system that replaces the combustion system, a heat pump type hot water supply apparatus that compresses a refrigerant that has absorbed the heat of air is known. In such a heat pump system using air as a heat source, the compressor of the heat pump circuit is operated using midnight power, which is generally inexpensive, and water that has been heat exchanged with the heated refrigerant is stored in a hot water storage tank. It has become. According to this method, the amount of carbon dioxide emissions can be reduced, but at night, the heat loss caused by storing hot water in the hot water storage tank is large and the unit price of electricity when the heat pump is operated during the day is high. , There is a risk of boosting utility costs.

  On the other hand, an absorption chiller / heater using an absorption heat pump is known. In the absorption chiller / heater, a regenerator, a condenser, an evaporator, an absorber, a circulation pump, and the like are connected by piping to form an absorption heat pump circuit. When a dilute solution (mixed solution of water and absorbent) is heated by a heating source in the regenerator, the refrigerant evaporates and the concentrated solution is regenerated, and the concentrated solution is led to the absorber, while the refrigerant vapor enters the condenser. It is guided and exchanges heat with the water in the heat transfer tube to become a refrigerant liquid. This refrigerant liquid is guided to the evaporator and is evaporated by exchanging heat with the water in the heat transfer tube, and the heat in the heat transfer tube cools the water in the heat transfer tube. The cooled water is circulated and supplied to, for example, an indoor unit and used for cooling operation. On the other hand, the refrigerant vapor evaporated by the evaporator is guided to the absorber and absorbed by the concentrated solution. The dilute solution whose concentration is reduced by absorbing the refrigerant vapor is pumped to the regenerator by the circulation pump and heated again by the heating source.

  According to the absorption chiller / heater of this type, for example, as described in Patent Document 1, the temperature of the cooled water is recovered by the evaporator and the temperature of the cooled water is maintained at the target value so as to maintain the temperature of the cooled water. By controlling the amount of combustion, it is possible to reduce the amount of carbon dioxide emitted and to obtain higher operating efficiency than the combustion method.

JP 2009-58207 A

  By the way, in the absorption cold / hot water machine of patent document 1, although disclosed about the structure which supplies the water cooled via the absorption heat pump circuit as an object for air_conditioning | cooling, for example, hot water supply operation is carried out using an absorption heat pump circuit as a heat source. However, sufficient consideration has not been given to performing cooling operation or heating operation.

  An object of the present invention is to provide an absorption-type air conditioning / heating water supply system that performs hot water supply and cooling or heating using an absorption heat pump circuit, has high operating efficiency, and has a small amount of carbon dioxide emission.

In order to solve the above problems, an absorption type air conditioning and hot water supply system of the present invention includes a regenerator that heats a dilute solution in which a refrigerant and an absorbent are dissolved to separate a concentrated solution and a refrigerant vapor, and a refrigerant vapor from the regenerator. A condenser that cools and condenses the refrigerant, an evaporator that evaporates the refrigerant liquid obtained from the condenser, an absorber that absorbs the refrigerant vapor generated in the evaporator into the concentrated solution from the regenerator, and the absorption Heated hot water having an absorption heat pump circuit formed by connecting a circulation pump for pumping a dilute solution from a regenerator to a regenerator, a bottom connected to a water supply source, and a top connected to a hot water supply pipe At least one of a vertically long hot water storage tank storing water and a first heat exchanger disposed in the condenser and water extracted from a position higher than the bottom of the hot water storage tank and the second heat exchanger disposed in the absorber. Store after heating through one side A hot water circulation circuit to return to the top side of the tank, a fourth liquid refrigerant received through a heat exchanger the cold generated in the absorption heat pump circuit disposed within the evaporator, arranged on the bottom side in the hot water storage tank has been a coolant circulation circuit 3 by circulation between the heat exchanger for cooling the bottom side of the water in the hot water storage tank, a fifth heat exchanger, or the hot water storage tank disposed on the bottom side in the hot water storage tank And a cooling / heating circuit for circulating the liquid refrigerant between the sixth heat exchanger disposed above the fifth heat exchanger and the cooling / heating heat load.

  According to this, in the state where the hot water storage tank is full, the third heat exchange in which the liquid refrigerant cooled and recovered through the fourth heat exchanger in the evaporator is arranged at the bottom of the hot water storage tank. The water in the hot water storage tank is cooled by being circulated and supplied to the condenser, while the heat is recovered through the first heat exchanger in the absorber and the second heat exchanger in the condenser. By returning the heated water to the top side of the hot water storage tank, the water on the top side in the hot water storage tank is heated. As a result, the water stored in the hot water storage tank forms a temperature stratification in which the temperature is higher on the top side and lower on the bottom side. For this reason, the cooling operation can be performed by supplying the liquid refrigerant cooled through the fifth heat exchanger disposed on the bottom side in the hot water storage tank to the heating / cooling heat load, which is more than the fifth heat exchanger. By supplying the liquid refrigerant heated via the sixth heat exchanger disposed above to the heat load for cooling and heating, the heating operation can be performed. Furthermore, the hot water on the top side in the hot water storage tank can be used for hot water supply. Thus, by collecting the hot and cold produced by the absorption heat pump circuit, and forming and storing the temperature stratification in the hot water storage tank, the collected hot and cold can be used effectively, High operating efficiency can be realized. Moreover, according to the operation using the absorption heat pump circuit, the amount of fuel consumed for heating the dilute solution of the regenerator can be reduced, so that the amount of carbon dioxide emitted can be reduced.

  In this case, the first heat collection refrigerant circulation circuit for circulating the liquid refrigerant between the heat collector that collects solar heat and the heat storage tank that stores the liquid refrigerant heated by the heat collector, and regeneration from the absorber A seventh heat exchanger for exchanging heat between the liquid refrigerant coming out of the heat storage tank and the dilute solution, and a seventh heat exchanger and the heat storage tank. And a second heat collecting refrigerant circulation circuit for circulating the liquid refrigerant between them.

  The liquid refrigerant heated by collecting solar heat is stored in a heat storage tank, and the stored heat is used to heat the diluted solution pumped from the absorber to the regenerator, thereby absorbing solar heat. Since it can be used as an auxiliary heat source for the heat pump circuit and fuel consumption can be reduced, the operating efficiency of the absorption heat pump circuit can be improved.

  In addition, an exhaust gas flow path through which the combustion exhaust gas of the fuel flows is provided in the fuel combustion chamber for heating the dilute solution of the regenerator, and the second heat collecting refrigerant circulation circuit includes the seventh heat An eighth heat exchanger for exchanging heat between the liquid refrigerant flowing through the flow path and the combustion exhaust gas flowing through the exhaust gas flow path is disposed in the flow path of the liquid refrigerant flowing through the exchanger to the heat storage tank. To do.

  According to this, the liquid refrigerant flowing through the second heat collecting refrigerant circulation circuit is radiated by the seventh heat exchanger, and then the heat storage tank in which the heat of the combustion exhaust gas is recovered and heated by the eighth heat exchanger. Returned in. Thus, the combustion efficiency of the fuel can be improved by effectively using the heat of the combustion exhaust gas. Moreover, even when sunlight cannot be collected, such as at night, the temperature drop of the liquid refrigerant stored in the heat storage tank can be suppressed, so the decrease in the heating capacity of the dilute solution via the seventh heat exchanger is suppressed. can do.

  In addition, a bypass pipe that bypasses the outlet side of the fourth heat exchanger and the inlet side of the third heat exchanger of the refrigerant circuit with the second heat collecting refrigerant circuit, and a first pipe provided in the bypass pipe The first flow path switching means includes at least a heat storage tank via a bypass line when the liquid refrigerant flowing through the refrigerant circulation circuit is operated when heating operation or boiling water heating operation is performed. It shall be formed so that it may switch to the passage which goes through.

  In this way, by flowing the liquid refrigerant heated via the heat storage tank to the third heat exchanger via the refrigerant circulation circuit, for example, solar heat can be used to store hot water without operating the absorption heat pump circuit. Since the water in the tank can be heated, the operation efficiency of the entire system can be improved.

  By the way, if the cooling operation is continued for a long time, the water temperature in the hot water storage tank gradually rises, so that the heat generated from the absorber and the condenser cannot be recovered through the hot water circulation circuit, and the absorption heat pump circuit is operated. May cause trouble. Therefore, the hot water circulation circuit is provided by bypassing an air-cooling heat radiating pipe for air-cooling water that has passed through at least one of the first heat exchanger and the second heat exchanger, and the water temperature at the set position in the hot water storage tank is There is provided a second flow path switching means for switching the water flow path so that the water that has passed through at least one of the first heat exchanger and the second heat exchanger flows through the flow path of the air-cooled heat radiating pipe when the set temperature is exceeded. It may be made up of.

  That is, when it is detected that the hot water in the hot water storage tank becomes surplus, the temperature is lowered by guiding the water heated via the hot water circulation circuit to the flow path of the air cooling radiator pipe and air cooling Thus, the operation of the absorption heat pump circuit can be maintained normally.

  ADVANTAGE OF THE INVENTION According to this invention, while performing hot_water | molten_metal supply and air_conditioning | cooling or heating using an absorption-type heat pump circuit, the operating efficiency is high and the cooling / heating hot-water supply system with few discharge | emission amounts of a carbon dioxide is realizable.

It is a figure explaining the whole structure of the absorption-type air-conditioning hot-water supply system with which this invention is applied, and the operation | movement of a cooling operation. It is a cycle diagram explaining operation | movement of the absorption heat pump circuit at the time of air_conditionaing | cooling operation | movement in the absorption-type air conditioning hot-water supply system with which this invention is applied. It is a figure explaining the whole structure of the absorption-type air-conditioning hot-water supply system with which this invention is applied, and operation | movement of heating operation. It is a cycle figure explaining operation of an absorption type heat pump circuit at the time of heating operation in an absorption type heating and cooling hot-water supply system to which the present invention is applied. It is a figure explaining the operation | movement of the whole structure and hot_water | molten_metal supply driving | operation of the absorption-type air conditioning hot-water supply system with which this invention is applied. It is a figure explaining the operation | movement of the whole structure of the absorption-type air-conditioning hot-water supply system with which this invention is applied, and a bath chase operation. It is a figure explaining the operation | movement of the whole structure of the absorption-type air-conditioning hot-water supply system with which this invention is applied, and a bath heat recovery driving | operation. It is a figure explaining the operation | movement of the whole structure and high temperature boiling operation of the absorption-type air-conditioning / hot-water supply system with which this invention is applied. It is a block diagram which shows the external appearance of the absorption-type air conditioning hot-water supply system with which this invention is applied. It is a block diagram which shows the external appearance of the absorption-type air conditioning hot-water supply system with which this invention is applied.

  Hereinafter, an embodiment of an absorption-type air conditioning and hot water supply system to which the present invention is applied will be described with reference to FIG. The absorption-type air-conditioning / heating water supply system of the present embodiment is an air-conditioning / heating-water supply system in which a gas-fired absorption-type heat pump air-conditioning / heating system is combined with a solar system that uses solar heat. A heat storage tank that stores the heat collected by the heat collector is a basic configuration, and in order to demonstrate the functions of the system consisting of these devices, a refrigerant circulation circuit, a hot water circulation circuit, an air conditioning circuit, and a first heat collecting refrigerant circulation circuit , A second heat collecting refrigerant circulation circuit, a hot water supply path, a bath chase circuit, a bath heat recovery circuit and the like are provided. Furthermore, the system is provided with operation control means for controlling the operation of each of these circuits.

  The absorption heat pump circuit 1 includes a regenerator 3, a condenser 5, an evaporator 7, an absorber 9, a circulation pump 11, a first solution heat exchanger 13, a second solution heat exchanger 15, a condenser heat exchanger 17, An evaporator heat exchanger 19 and an absorber heat exchanger 21 are provided, which are accommodated in the same container. The regenerator 3, the condenser 5, the evaporator 7, the absorber 9 and the circulation pump 11 include an absorbent that absorbs the refrigerant and the refrigerant vapor by connecting them with the refrigerant system connection pipe and the solution system connection pipe. A circuit for circulating the absorbing liquid is formed. Below the regenerator 3, there is provided a heating source 23 that burns fossil fuel and heats and concentrates the diluted solution of the absorbent. The heating source 23 is disposed in a combustion chamber (not shown). Water is used as the refrigerant used in the absorption heat pump circuit 1, and a mixed material such as lithium bromide (LiBr) and lithium iodide (LiI) is used as the absorbent. As long as it operates, it is not limited to this example.

  The regenerator 3 generates a refrigerant vapor and a concentrated solution by heating the diluted solution of the absorbing solution with the heating source 23. The concentrated solution is guided to the first solution heat exchanger 13 via the connection pipe 25, exchanged heat with the dilute solution sent from the absorber 9 by the circulation pump 11, cooled, and then put into the absorber 9. It has come to be guided. On the other hand, the refrigerant vapor generated in the regenerator 3 is guided to the condenser 5.

  A condenser heat exchanger 17 is inserted into the condenser 5, and the refrigerant vapor introduced into the condenser 5 is condensed by exchanging heat with water flowing in the condenser heat exchanger 17, and is converted into a liquid refrigerant. Become. This liquid refrigerant is led from the condenser 5 to the evaporator 7 via the connection pipe 27.

  An evaporator heat exchanger 19 is inserted into the evaporator 7, and the liquid refrigerant introduced from the condenser 5 exchanges heat with water flowing through the evaporator heat exchanger 19 to evaporate into refrigerant vapor. This refrigerant vapor is guided to the adjacent absorber 9. The evaporator 7 and the absorber 9 are formed by being partitioned by a partition wall having a gap communicating with one container.

  An absorber heat exchanger 21 is inserted into the absorber 9, and the concentrated solution sent from the regenerator 3 absorbs the refrigerant vapor introduced from the evaporator 7, thereby reducing the concentration of the concentrated solution. Into a dilute solution. This dilute solution is cooled by exchanging heat with the water flowing through the absorber heat exchanger 21, and then extracted by the circulation pump 11, and is connected to the first solution heat exchanger 13 and the second solution via the connection pipe 29. The heat exchanger 15 is sequentially returned to the regenerator 3.

  The hot water storage tank 31 is a vertically long hollow cylindrical container, and has a bottom portion connected to a water supply source (not shown) and a top portion connected to the hot water supply terminal 33 via a connection pipe. Inside the hot water storage tank 31, a heat collecting heat exchanger 35 for solar heat collecting, a cooling operation heat exchanger 37 for cooling operation, and a bath heat recovery heat exchanger 39 for collecting bath heat are respectively provided on the bottom side. On the top side, a heating operation heat exchanger 41 for heating operation and a reheating heat exchanger 43 for reheating and warming are respectively inserted and disposed. Each of these five heat exchangers is formed by meandering a material having high heat conductivity, for example, a copper hollow tube in the hot water storage tank 31. Here, the heat exchanger 41 for heating operation and the heat exchanger 43 for reheating are arranged at a height position corresponding to the set water temperature in the hot water storage tank 31 and arranged above at least the other three heat exchangers. Has been. In the hot water storage tank 31 configured in this way, water is always stored in a full state.

  Next, the first heat collecting refrigerant circulation circuit will be described. For example, the heat collector 45 includes a heat collecting plate (not shown) that collects heat for heating water in the hot water storage tank 31 from sunlight. The outer surface of the heat collector 45 on the side receiving sunlight is covered with a glass panel, and the heat collecting plate is formed of an aluminum alloy having high thermal conductivity or the like. Between the glass panel of the heat collector 45 and the heat collecting plate, a hollow meandering pipe is provided. A first heat collecting refrigerant inlet pipe 47 is connected to one end of the pipe, and the other end is connected to the other end. A first heat collecting refrigerant outlet pipe 49 is connected. The configuration of the heat collector 45 is not limited to the above as long as the heat collecting plate heated by collecting solar heat is configured to heat the liquid refrigerant.

  The heat storage tank 51 is composed of a hollow cylindrical container. The heat storage tank 51 has a space in which liquid refrigerant serving as a heat storage agent is stored, and a first heat collection refrigerant inlet pipe 47 and a second heat collection refrigerant outlet pipe 53 are connected to the top, and the bottom The second heat collecting refrigerant outlet pipe 49 and the second heat collecting refrigerant inlet pipe 55 are connected to the. A circulation pump 57 is disposed in the second heat collecting refrigerant outlet pipe 49.

  Here, the heat storage tank 51 adopts a configuration in which a latent heat storage agent (for example, paraffin or sugar alcohol) that changes in phase into a solid and a liquid in a normal temperature range is housed in order to maximize the heat storage amount per volume. can do. In this case, since the latent heat storage material is in a solid state and does not flow, the latent heat storage material is stored in a fixed state in the heat storage tank 51, and liquid refrigerant is introduced into the heat storage tank 51 to exchange heat with the latent heat storage material. Composed.

  With such a configuration, the first heat collecting refrigerant circulation circuit includes a heat collector 45, a first heat collecting refrigerant inlet pipe 47, a heat storage tank 51, a first heat collecting refrigerant outlet pipe 49 provided with a circulation pump 57, A closed circuit is configured by sequentially connecting the heat collectors 45. Due to the operation of the circulation pump 57, the liquid refrigerant heated by the heat collector 45 flows into the heat storage tank 51 via the first heat collection refrigerant inlet pipe 47, and hot water and heat stored in the heat storage tank 51 are collected. Replace it and heat it. Then, the liquid refrigerant flowing out of the heat storage tank 51 is returned to the heat collector 45 via the first heat collecting refrigerant outlet pipe 49 and heated. As described above, the first heat collecting refrigerant circulation circuit is for storing solar heat by introducing the liquid refrigerant heated by collecting solar light by the heat collector 45 into the heat storage tank 51.

  Next, the second heat collecting refrigerant circulation circuit will be described. The second heat collecting refrigerant outlet pipe 53 is connected to the second solution heat exchanger 15, and one end of a connection pipe 59 is connected to the second solution heat exchanger 15. The other end of the connection pipe 59 is connected to the flow path switching valve 61, and the other end of the second heat collecting refrigerant inlet pipe 55 is connected to the flow path switching valve 61. That is, the second heat collecting refrigerant inlet pipe 55 has one end connected to the flow path switching valve 61 and the other end connected to the bottom of the heat storage tank 51.

  Here, the second heat collecting refrigerant inlet pipe 55 has an intermediate passage extending through the exhaust gas passage 63 of the combustion exhaust gas generated when the fuel is burned by the heating source 23, and In the exhaust gas flow path 63, an exhaust gas heat exchanger 65 for exchanging heat between the liquid refrigerant flowing through the second heat collecting refrigerant inlet pipe 55 and the combustion exhaust gas is bent or meandered in a substantially U shape. . A circulation pump 67 is disposed between the exhaust gas heat exchanger 65 and the heat storage tank 51 in the second heat collecting refrigerant inlet pipe 55.

  With such a configuration, the second heat collecting refrigerant circulation circuit includes the heat storage tank 51, the second heat collecting refrigerant outlet pipe 53, the second solution heat exchanger 15, the connection pipe 59, the flow path switching valve 61, and the exhaust gas heat exchanger. 65 and the second heat collecting refrigerant inlet pipe 55 provided with the circulation pump 67 and the heat storage tank 51 are sequentially connected to form a closed circuit. Due to the operation of the circulation pump 67, the liquid refrigerant heated in the heat storage tank 51 heats the dilute solution by exchanging heat with the dilute solution in the second solution heat exchanger 15 via the second heat collecting refrigerant outlet pipe 53. After that, it is led to the exhaust gas heat exchanger 65 via the connection pipe 59. Then, the liquid refrigerant heated and exchanged with the combustion exhaust gas in the exhaust gas heat exchanger 65 is returned to the heat storage tank 51 through the second heat collecting refrigerant inlet pipe 55. As described above, the second heat collecting refrigerant circulation circuit is for using the solar heat stored in the heat storage tank 51 for heating the diluted solution of the absorption heat pump circuit 1.

  Next, the refrigerant circulation circuit will be described. One end of a connection pipe 68 is connected to the inlet of the evaporator heat exchanger 19, and a circulation pump 69 is disposed in the connection pipe 68 and the other end is an outlet of the heat collecting heat exchanger 35. Connected to the department. One end of a connection pipe 71 is connected to the outlet of the evaporator heat exchanger 19, and a flow path switching valve 73 is disposed in the connection pipe 71, and the other end is a heat collection heat exchanger. It is connected to the inlet of the vessel 35.

  With such a configuration, the refrigerant circulation circuit includes the evaporator heat exchanger 19, the connection pipe 71 provided with the flow path switching valve 73, the heat collection heat exchanger 35, the connection pipe 68 provided with the circulation pump 69, The evaporator heat exchanger 19 is sequentially connected to form a closed circuit. By operating the circulation pump 69, the liquid refrigerant circulating between the evaporator heat exchanger 19 and the heat collecting heat exchanger 35 is cooled by the cold heat generated in the evaporator 7 through the evaporator heat exchanger 19. After being collected, it is led to the heat collecting heat exchanger 35 through the connection pipe 71, exchanges heat with the water on the bottom side in the hot water storage tank 31 to release cold heat, and again through the connection pipe 68. It returns to the heat exchanger 19 for evaporators. In this way, the refrigerant circulation circuit stores the low-temperature water for cooling operation on the bottom side in the hot water storage tank 31 by dissipating the cold heat collected from the evaporator 7 to the water in the hot water storage tank 31. It is.

  Next, the hot water circulation circuit will be described. One end of a connection pipe 75 that communicates with the inside of the hot water storage tank is inserted at a position substantially in the middle of the hot water storage tank 31, and the other end of the connection pipe 75 is connected to the inlet of the heat exchanger 21 for absorber. Yes. The connection pipe 75 is provided with a circulation pump 77. A flow path between the circulation pump 77 and the absorber heat exchanger 21 is bifurcated and one end of the connection pipe 79 is connected. The other end of the connection pipe 79 is connected to the inlet portion of the condenser heat exchanger 17. One end of a connection pipe 81 is connected to the outlet portion of the absorber heat exchanger 21. One end of a connection pipe 83 is connected to the outlet of the condenser heat exchanger 17, and the other end of the connection pipe 81 is connected to the connection pipe 83. The other end of the connection pipe 83 is connected to the top of the hot water storage tank 31 so as to communicate with the inside of the tank.

  With such a configuration, the hot water circulation circuit includes a substantially middle stage portion of the hot water storage tank 31, a connection pipe 75 and a connection pipe 79 provided with the circulation pump 77, a condenser heat exchanger 17 and an absorber heat exchanger 21, and a connection pipe. 81, the connecting pipe 83, and the top of the hot water storage tank 31 are sequentially connected to form a closed circuit. The water extracted from the hot water storage tank 31 by operating the circulation pump 77 collects the heat generated in the condenser 5 via the condenser heat exchanger 17 and also passes through the absorber heat exchanger 21. Then, the heat generated in the absorber 9 is recovered. As a result, the water heated through the condenser heat exchanger 17 and the absorber heat exchanger 21 is returned to the top side of the hot water storage tank 31. That is, the hot water circulation circuit heats the water extracted from the vicinity of the middle stage of the hot water storage tank 31 and returns it to the top of the hot water storage tank 31, so that hot water used for heating and hot water supply is provided on the top side of the hot water storage tank 31. It is for saving.

  Next, an air conditioning circuit will be described. One end of a connection pipe 85 is connected to the inlet of the cooling operation heat exchanger 37 disposed on the bottom side in the hot water storage tank 31, and the other end of the connection pipe 85 is connected to the outlet of the indoor unit 87. Has been. On the other hand, one end of a connection pipe 89 is connected to the outlet of the heat exchanger 37 for cooling operation. The connection pipe 89 is provided with a flow path switching valve 91 and a circulation pump 93, and has the other end. It is connected to the entrance of the indoor unit 87. The heating operation heat exchanger 41 arranged on the top side in the hot water storage tank 31 has an inlet side connected to the connection pipe 85 and an outlet side connected to the flow path switching valve 91 of the connection pipe 89. In this embodiment, the indoor unit 87 is provided as the cooling / heating load. However, the cooling / heating load is not limited to the indoor unit 87. For example, instead of the indoor unit 87 or together with the indoor unit 87, a floor heating device or the like is provided. You may make it provide. In this case, liquid refrigerant is circulated between the floor heating device and the heat exchanger 41 for heating operation.

  With such a configuration, the cooling / heating circuit includes an outlet of the cooling operation heat exchanger 37 or the heating operation heat exchanger 41, a connection pipe 89 in which the flow path switching valve 91 and the circulation pump 93 are disposed, and an indoor unit. 87, connection pipe 85, cooling operation heat exchanger 37 or heating operation heat exchanger 41 inlets are sequentially connected to form a closed circuit. By operating the circulation pump 93, the liquid refrigerant circulates between the cooling operation heat exchanger 37 or the heating operation heat exchanger 41 and the indoor unit 87. The liquid refrigerant is cooled or heated by exchanging heat with water at a predetermined temperature in the hot water storage tank 31 via the heat exchanger 37 for cooling operation or the heat exchanger 41 for heating operation, and then passes through the connection pipe 89. Then, the indoor air is guided to the indoor unit 87 and heat or cools the indoor air by exchanging heat with the air. The liquid refrigerant that has passed through the indoor unit 87 is returned to the cooling operation heat exchanger 37 or the heating operation heat exchanger 41 again via the connection pipe 85. Here, the switching operation of the flow path switching valve 91 is controlled by the operation control means, and the refrigerant flow path is switched by the flow path switching valve 91 so that the liquid refrigerant is used for the cooling operation heat exchanger 37 or the heating operation. It flows through one of the heat exchangers 41. As described above, the air conditioning circuit is for performing the air conditioning operation by circulating and supplying the liquid refrigerant heat-exchanged with water at a predetermined temperature in the hot water storage tank 31 to the indoor unit 87.

  Next, the hot water supply path will be described. Connected to the bottom of the hot water storage tank 31 is a connection pipe 97 branched from a water supply pipe 95 to which tap water or the like is supplied from a water supply source (not shown). A connection pipe 99 is connected to the top of the hot water storage tank 31, and the connection pipe 99 is connected to the water supply pipe 95 via the mixing valve 101. One end of a hot water supply pipe 103 is connected to the mixing valve 101, and the other end of the hot water supply pipe 103 is connected to a hot water supply terminal 33. Here, the hot water supply terminal 33 includes a hot water supply port such as a faucet or a shower. The connection pipe 105 branched from the connection pipe 95 and the connection pipe 107 branched from the connection pipe 99 are each connected to the mixing valve 109, and the connection pipe 111 having one end connected to the mixing valve 109 is connected to the bath. It communicates with the inside of the bathtub 115 through the outlet connection pipe 113.

  With such a configuration, the hot water supply path is configured such that the water supply pipe 95, the connection pipe 97, the hot water storage tank 31, the connection pipe 99, the mixing valve 101, the hot water supply pipe 103, and the hot water supply terminal 33 are sequentially connected. A bathtub formed by sequentially connecting a first hot water supply path, a water supply pipe 95, a connection pipe 97, a hot water storage tank 31, a connection pipe 99, a connection pipe 107, a mixing valve 109, a connection pipe 111, a bath outlet connection pipe 113, and a bathtub 115. Two paths of the second hot water supply path for hot water filling are formed. Here, the hot water supply to the hot water supply terminal 33 through the first hot water supply path is controlled by the operation of the mixing valve 101 under the control of the operation control means, so that the hot water in the hot water storage tank 31 is adjusted to a predetermined water temperature. Then, a predetermined amount of hot water is supplied to the hot water supply terminal 33. In addition, hot water supplied into the bathtub 115 by the second hot water supply path is controlled by the operation of the mixing valves 101 and 109 under the control of the operation control means, so that the hot water in the hot water storage tank 31 becomes a predetermined hot water temperature. And a predetermined amount of hot water is supplied into the bathtub 115. In this way, the first hot water supply path and the second hot water supply path are for adjusting the hot water in the hot water storage tank 31 to a predetermined temperature and supplying hot water from the hot water supply terminal 33 into the hot water or the bathtub 115.

  Next, a bath reheating circuit and a bath heat recovery circuit will be described. One end of a bath outlet connection pipe 113 provided with a circulation pump 117 and a flow path switching valve 119 is connected to the bathtub 115, and one end of a bath inlet connection pipe 121 is connected to the bathtub 115. The other end of the bath outlet connecting pipe 113 is connected to the inlet portion of the heat exchanger 39 for recovering bath heat in the hot water storage tank 31, and the other end of the bath inlet connecting pipe 121 is used for heat exchange for recovering the bath heat. It is connected to the outlet of the vessel 39. On the other hand, one end of a connection pipe 123 is connected to the flow path switching valve 119, and the other end of the connection pipe 123 is connected to the inlet portion of the reheating heat exchanger 43 in the hot water storage tank 31. In addition, the other end of the connection pipe 125 branched from the bath inlet connection pipe 121 is connected to the outlet of the reheating heat exchanger 43.

  With such a configuration, the bath reheating circuit includes the bathtub 115, the bath outlet connecting pipe 113, the flow path switching valve 119, the connecting pipe 123, the reheating heat exchanger 43, the connecting pipe 125, the bath inlet connecting pipe 121, and the bathtub. 115 are sequentially connected to form a closed circuit. The bath heat recovery circuit is configured by connecting the bathtub 115, the bath outlet connection pipe 113, the bath heat recovery heat exchanger 39, the bath inlet connection pipe 121, and the bathtub 115 in this order to form a closed circuit. Here, the operation of the bath reheating circuit and the bath heat recovery circuit can be switched by controlling the operation of the flow path switching valve 119 under the control of the operation control means.

  In the bath reheating circuit, by operating the circulation pump 117, the bath water accumulated in the bathtub 115 is extracted and circulated between the reheating heat exchanger 43. The bathtub water is heated by exchanging heat with hot water on the top side in the hot water storage tank 31 via the reheating heat exchanger 43 and then returned to the bathtub 115. Thus, the bath chase circuit is for performing a chase operation for heating the bath water in the bathtub 115.

  Further, in the bath heat recovery circuit, by operating the circulation pump 117, the used bath water accumulated in the bathtub 115 is extracted and circulated between the bath heat recovery heat exchanger 39. This bathtub water heats the water on the bottom side in the hot water storage tank by exchanging heat with the water in the hot water storage tank via the heat exchanger 39 for recovering bath heat. As described above, the bath heat recovery circuit is for recovering the heat of the bath water in the bathtub 115 in the hot water storage tank 31 for effective use.

  Next, other configurations will be described. As shown in FIG. 1, one end of a bypass pipe 127 is connected to the flow path switching valve 73 disposed in the connection pipe 71, and the other end of the bypass pipe 127 is a second heat collecting refrigerant outlet pipe. 53. The flow path between the flow path switching valve 73 of the connection pipe 71 and the outlet of the evaporator heat exchanger 19 is bifurcated, and one end of a bypass pipe 129 is connected to the branch. The other end of the bypass pipe 129 is connected to the flow path switching valve 61. And the operation | movement of the flow path switching valves 61 and 73 to which these bypass lines are connected is controlled under the control of the operation control means.

  Specifically, when the operation of the flow path switching valve 61 is controlled and the bypass pipe 129 is opened, the liquid refrigerant flowing through the connection pipe 71 of the refrigerant circulation circuit flows through the bypass pipe 129. It flows into the second heat collecting refrigerant inlet pipe 55 where the switching valve 61 is disposed. On the other hand, when the operation of the flow path switching valve 73 is controlled and the bypass pipe 127 is opened, the liquid refrigerant flowing through the second heat collection refrigerant outlet pipe 53 of the second heat collection refrigerant circulation circuit is bypassed by the bypass pipe 127. It flows into the connection pipe 71 in which the flow path switching valve 73 is disposed via. In the present embodiment, the operations of the flow path switching valves 61 and 73 are controlled so that the two bypass pipelines 129 and 127 are simultaneously opened or closed.

  Next, the air-cooling heat radiating pipe 131 connected to the connection pipe 83 will be described. As shown in FIG. 1, water flowing through the connection pipe 83 is air-cooled in the middle of the flow path of the connection pipe 83, that is, in the flow path between the connection portion to which the connection pipe 81 is connected and the top of the hot water storage tank 31. Therefore, water flowing through the connection pipe 83 flows into the air-cooling heat radiating pipe 131 through the flow path switching valve 133. The air-cooling heat radiating tube 131 is formed by bending a material having high thermal conductivity, for example, a copper hollow tube, for example, in a U shape, and a plurality of plate-like fins are attached to the hollow tube, and the vicinity thereof. In addition, a cooling fan 135 is installed. The inflow of water into the air-cooled heat radiating pipe 131 is controlled by the operation of the flow path switching valve 133 under the control of the operation control means, for example, at a predetermined height position detected by a temperature sensor installed in the hot water storage tank 31. When the water temperature exceeds the set temperature, the water flowing through the connection pipe 83 flows into the air-cooling heat radiating pipe 131.

  In the present embodiment, the air-cooling heat radiating pipe 131 is arranged at a position where water after flowing through the condenser heat exchanger 17 and the absorber heat exchanger 21 flows in the hot water circulation circuit. However, it is not limited to this configuration. For example, two air-cooling heat radiating pipes 131 are arranged corresponding to each heat exchanger, or arranged only in the flow path of water that has passed through one of the heat exchangers. May be.

  Next, the bypass conduit 137 provided in the absorption heat pump circuit 1 will be described. As shown in FIG. 1, the bypass pipe line 137 is disposed across the condenser 5 and the absorber 9 via the on-off valve 139. The on-off valve 139 is controlled in its opening / closing operation under the control of the operation control means. For example, when the on-off valve 139 is switched to a predetermined operation mode, the on-off valve 139 is opened, and the refrigerant vapor in the condenser 5 flows into the absorber 9. To be introduced.

  Next, the operation control means for controlling the operation of the absorption type air conditioning and hot water supply system of this embodiment will be described. The operation control means has its control circuit incorporated in a control panel (not shown). For example, the detection value of sensors installed in each device such as the hot water storage tank 31 and the heat storage tank 51 in the system, and the remote controller 141 operated by the user. By controlling the operation of each circuit, the operation of the flow path switching valves 61, 73, 91, 119, 133, the on-off valve 139, the mixing valves 101, 109, etc. according to the detected values such as The operation of each operation such as a hot water supply operation is controlled. Examples of the sensor include a temperature sensor that detects the temperature state of each part, a pressure sensor that detects pressure, and a water amount sensor that detects the amount of water.

  Next, the operation of the cooling operation of the absorption-type air-conditioning / hot-water supply system of the present embodiment configured as described above will be described with reference to FIG. In the following control, at the start of the cooling operation, it is assumed that the hot water storage tank 31 is filled with water from a water supply source, and the heat storage tank 51 is filled with liquid refrigerant. To do.

  When the user operates the remote controller 141 to start the cooling operation, the operation control means starts the operation of the absorption heat pump circuit 1 and the circulation pumps 57, 67, 69, 77, 93. At this time, the flow path switching valves 61 and 73 are controlled so that liquid refrigerant does not flow into the flow paths of the bypass pipe lines 129 and 127, and the flow path switching valve 91 is a heat exchanger for heating operation. The channel is controlled so that the liquid refrigerant does not flow into the channel 41. In addition, the flow path of the flow path switching valve 133 is controlled so that liquid refrigerant does not flow into the flow path of the air-cooling heat radiating pipe 131. The on-off valve 139 is assumed to be in a closed state unless otherwise specified.

  By such control, heating of the absorption liquid by the heating source 23 is started in the absorption heat pump circuit 1, and circulation of the refrigerant and the absorption liquid is started. In the first heat collecting refrigerant circulation circuit, the temperature of the liquid refrigerant stored in the heat storage tank 51 is increased by circulating the liquid refrigerant heated through the heat collector 45 in the direction of the arrow. In the second heat collecting refrigerant circulation circuit, the liquid refrigerant heated via the heat storage tank 51 and the exhaust gas heat exchanger 65 exchanges heat with the dilute solution in the second solution heat exchanger 15, thereby Heat.

  In the refrigerant circulation circuit, the liquid refrigerant received through the evaporator heat exchanger 19 in the cold heat generated by the absorption heat pump circuit 1 circulates in the direction of the arrow, and hot water is stored via the heat collection heat exchanger 35. The cold heat is radiated into the tank 31 to cool the water on the bottom side in the hot water storage tank 31. Thereby, the water temperature on the bottom side of the hot water storage tank 31 is cooled, for example, from 14 ° C. to 9 ° C.

  Further, in the hot water circulation circuit, water extracted from the vicinity of the middle stage of the hot water storage tank 31 flows in the direction of the arrow, and the heat generated in the absorption heat pump circuit 1 is converted into the heat exchanger 17 for the condenser and the heat exchanger 21 for the absorber. The water on the top side in the hot water storage tank 31 is heated by being returned to the top of the hot water storage tank 31 in a heated state. Thereby, the water temperature of the hot water storage tank 31 is, for example, a temperature stratification in which the bottom side is 9 ° C., the middle portion is 41 ° C., and the top side is 45 ° C. As a result, in the cooling / heating circuit, the liquid refrigerant that has received the cold heat from the water on the bottom side in the hot water storage tank 31 via the cooling operation heat exchanger 37 flows in the direction of the arrow, and is circulated and supplied to the indoor unit 87 to be indoors. The room is cooled by exchanging heat with air.

  By the way, when such a cooling operation is continued for a long time, the temperature of the water in the hot water storage tank 31 gradually rises as hot water heated in the hot water storage tank 31 continues to be supplied via the hot water circulation circuit. As a result, in the hot water circulation circuit, the heat generated in the condenser 5 and the absorber 9 cannot be sufficiently removed, which may affect the operation of the absorption heat pump circuit 1. Therefore, in the operation control means, for example, based on the detection result of the temperature sensor provided in the hot water storage tank 31, the water temperature at the set position (height) rises above the set temperature, that is, hot water above the set temperature is stored in the set amount. When it is detected, the operation of the flow path switching valve 133 is controlled so that the flow path of the hot water flowing through the hot water circulation circuit is bypassed to the air-cooling heat radiating pipe 131. As a result, the hot water flowing through the connection pipe 83 flows through the air-cooling heat radiating pipe 131, so that it is returned to the hot water storage tank 31 after it is air-cooled through heat exchange with the air blown from the cooling fan 135. The water in the hot water storage tank 31 can be prevented from being heated more than necessary, and the heat generated in the absorption heat pump circuit 1 can be continuously recovered.

  Here, for example, when the outside air temperature is high, such as in summer, the temperature difference between water and air flowing in the air-cooled heat radiating pipe 131 becomes small, and there is a possibility that a sufficient heat radiation effect cannot be obtained. For this reason, for example, when the outside air temperature is higher than the set temperature, the operation control means adjusts the combustion amount of the heating source so as to increase the heating temperature of the dilute solution of the regenerator 3 in the absorption heat pump circuit 1. Control is performed to increase the amount of heat generated in the condenser 5 and the absorber 9. Thereby, since the hot water flowing through the hot water circulation circuit flows into the air-cooling heat radiating pipe 131 while being heated to a higher temperature, the air-cooling efficiency can be improved and the hot water can be cooled to a predetermined temperature.

  FIG. 2 is a cycle diagram for explaining the operation of the absorption heat pump circuit 1 during the cooling operation. In the figure, the vertical axis represents the vapor pressure (mmHg), the horizontal axis represents the temperature, and each numerical value represents the vapor pressure, temperature and concentration (%) during the cooling operation. The numerical value in the parenthesis indicates the numerical value of the operation state of the heat pump circuit 1 when water flowing through the hot water circulation circuit is air-cooled by the air-cooling heat radiating pipe 131. As shown in the figure, during the cooling operation, the efficiency of the cycle operation is improved by using solar heat for heating the dilute solution (absorbing liquid) sent from the absorber 9 to the regenerator 3. In addition, since each numerical value is only an example which shows the state at the time of air_conditionaing | cooling operation, it is not limited to these numerical values.

  Thus, during the cooling operation, the heat collected from sunlight and the dilute solution of the regenerator 3 are heated by the heating source by the operations of the first heat collecting refrigerant circulation circuit and the second heat collecting refrigerant circulation circuit. Since the heat recovered from the flue gas exhausted at the time of heating is used to heat the dilute solution flowing toward the regenerator 3 in the absorption heat pump circuit 1, the consumption of fuel used in the heating source is reduced. Thus, the amount of carbon dioxide emitted can be reduced, and the operating efficiency of the absorption heat pump circuit 1 can be improved. Further, by the operation of the refrigerant circulation circuit and the hot water circulation circuit, the cold water collected from the evaporator 7 of the absorption heat pump circuit 1 is used to cool the water on the bottom side of the hot water storage tank 31, in other words, the water in the hot water storage tank 31. Is used as a heat source for the evaporator 7, and the water on the top side in the hot water storage tank 31 is heated using the heat recovered from the condenser 5 and the absorber 9, in other words, the water in the hot water storage tank 31 is condensed. It is used as a cold heat source for the vessel 5 and the absorber 9. For this reason, the cooling operation can be performed using the cold water on the bottom side of the hot water storage tank 31 by the operation of the air conditioning circuit, and the hot water on the top side can be used for hot water supply.

  In the present embodiment, an example in which the operation of each circuit is started simultaneously with the cooling operation start command is described. However, the present invention is not limited to this. For example, the first heat collecting refrigerant circulation circuit Regardless of the command, it is operated as appropriate, collecting sunlight during the day and controlling the liquid refrigerant in the heat storage tank 51 in advance to control the liquid refrigerant in the heat storage tank 51 simultaneously with the start of the cooling operation. Heat can be used immediately, and heat stored during the day can be used during night driving. In addition, the absorption heat pump circuit 1, the refrigerant circulation circuit, and the hot water circulation circuit are also operated appropriately regardless of the cooling operation, and the cooling operation is started by forming a temperature stratification at a predetermined temperature in the hot water storage tank 31. At the same time, the cooling function can be exhibited immediately, and hot water can be supplied whenever necessary, so that the comfort of the user can be improved.

  In the present embodiment, solar heat that tends to be left in the daytime is used as needed for cooling operation, and the heat collected from sunlight is stored in the heat storage tank 51, and the stored heat is absorbed after sunset. Since it can be used as an auxiliary heat source used for heating the dilute solution in the heat pump circuit 1, a high coefficient of performance (COP) as the entire system can be realized.

  Next, the operation of the heating operation of the absorption-type air conditioning and hot water supply system of the present embodiment will be described with reference to FIG. 3 has the same apparatus configuration as that of FIG. 1, but the content of control for operating each circuit by the operation control means is different from that in the cooling operation. In the following control, it is assumed that the liquid refrigerant heated to a predetermined temperature is stored in advance in the heat storage tank 51 and the hot water storage tank 31 when the heating operation is started.

  When the user operates the remote controller 141 to start the heating operation, the operation control means starts the operation of the circulation pumps 57, 69, and 93 (if necessary, the operation of the circulation pump 67). At this time, under the control of the operation control means, the flow path switching valves 61 and 73 are controlled so that the liquid refrigerant flows into the flow paths of the bypass pipe lines 129 and 127, and the flow path switching valve 91 is The flow path is controlled so that the liquid refrigerant does not flow into the flow path of the heat exchanger 37 for cooling operation. Further, the flow path of the flow path switching valve 133 is controlled so that the liquid refrigerant does not flow into the air-cooled heat radiating pipe 131. At the beginning of the heating operation, the operations of the absorption heat pump circuit 1 and the hot water circulation circuit are stopped.

  By such control, the first heat collecting refrigerant circulation circuit is started to operate similarly to the cooling operation. On the other hand, in the second heat collecting refrigerant circulation circuit and the refrigerant circulation circuit, by opening the bypass pipes 127 and 129, a new liquid refrigerant circuit (hereinafter referred to as a heat collecting and heating circuit) is formed. . That is, by the operation of the circulation pump 69, the liquid refrigerant that has passed through the evaporator heat exchanger 19 flows through the bypass pipe 129 and the flow path switching valve 61, and then the exhaust gas heat exchanger 65, the circulation pump 67, and the heat storage. The liquid refrigerant heated via the tank 51 flows in the direction of the arrow and flows into the bypass conduit 127. And the liquid refrigerant which flowed through the connection pipe 71 via the flow path switching valve 73 heats the water on the bottom side by exchanging heat with the water in the hot water storage tank 31 via the heat exchanger 35 for collecting heat. After that, it flows through the connection pipe 68 and flows into the evaporator heat exchanger 19. At this time, since the operation of the absorption heat pump circuit 1 is stopped, the temperature change of the liquid refrigerant hardly occurs before and after passing through the evaporator heat exchanger 19.

  By performing the operation of the heat collecting and heating circuit in this manner, the water at the bottom side is heated in the hot water storage tank 31, so that the water temperature in the hot water storage tank 31 rises, and hot water required for heating and hot water supply. Is stored. In the cooling / heating circuit, the heated liquid refrigerant flows from the hot water on the top side in the hot water storage tank 31 through the heat exchanger 41 for heating operation, flows in the direction of the arrow, and is circulated and supplied to the indoor unit 87. The room is heated by exchanging heat with room air.

  On the other hand, for example, when it is detected from the detection result of the temperature sensor that the remaining amount of hot water in the hot water storage tank 31 is insufficient due to an increase in heating load or the use of hot water of a predetermined amount or more for hot water supply, the operation control means Starts the operation of the absorption heat pump circuit 1 and the hot water circulation circuit. Thereby, like the cooling operation, after the hot water extracted from the hot water storage tank 31 by the hot water circulation circuit is recovered and heated via the condenser heat exchanger 17 and the absorber heat exchanger 21, It is supplied into the hot water storage tank 31. In this case, for example, if the water temperature near the middle stage of the hot water storage tank 31 is 55 ° C., the water temperature on the top side is heated to 60 ° C. In the evaporator heat exchanger 19, the cold generated in the evaporator 7 is recovered by the liquid refrigerant flowing through the heat collecting and heating circuit. This liquid refrigerant passes through the exhaust gas heat exchanger 65 and the heat storage tank 51. Then, since it flows into the heat collecting heat exchanger 35 after being heated, there is no influence on heating the bottom of the hot water storage tank 31.

  FIG. 4 is a cycle diagram for explaining the operation of the absorption heat pump circuit 1 during heating operation (including hot water supply). As described with reference to FIG. 2, each numerical value represents vapor pressure, temperature, and concentration. . During the heating operation, the vapor pressure, temperature, and concentration are all adjusted to be higher than those during the cooling operation. Further, as shown in the figure, during the heating operation, the efficiency of the cycle operation is improved by using solar heat as a heat source of the evaporator 7. In addition, since each numerical value is only an example which shows the state at the time of heating operation, it is not limited to these numerical values.

  Thus, during the heating operation, by operating the first heat collecting refrigerant circulation circuit and the heat collecting and heating circuit, the heat collected from sunlight is used without operating the absorption heat pump circuit 1. The water in the hot water storage tank 31 can be heated to a predetermined temperature. In addition, by operating the absorption heat pump circuit 1 as necessary, heat collected from sunlight and heat recovered from combustion exhaust gas discharged when the dilute solution of the regenerator 3 is heated by a heating source. Can be used as a heat source for the evaporator 7 in the water heating on the bottom side in the hot water storage tank 31 and in the absorption heat pump circuit 1. For this reason, in the absorption heat pump circuit 1, the consumption of fuel used in the heating source of the regenerator 3 is reduced to reduce carbon dioxide emissions, and the operating efficiency of the absorption heat pump circuit 1 is improved. be able to. Further, by operating the hot water circulation circuit and heating the water on the top side in the hot water storage tank 31 using the heat recovered from the condenser 5 and the absorber 9, the hot water storage tank 31 has heating operation and hot water supply. It becomes possible to store an amount of hot water that does not cause hot water shortages even when used simultaneously.

  Further, in the present embodiment, the example in which the operations of the first heat collecting refrigerant circulation circuit and the heat collecting and heating circuit are started simultaneously with the heating operation start command has been described. However, these circuits are related to the heating operation start command. It is controlled to operate appropriately and to heat and boil the liquid refrigerant stored in the heat storage tank 51 and the water stored in the hot water storage tank 31 by using sunlight during the day. . Thereby, since the heating operation and the hot water supply operation can be performed while shortening the operation time of the absorption heat pump circuit 1 as much as possible, the operation efficiency of the entire system can be increased. In addition, the heating function can be immediately exhibited simultaneously with the start of the heating operation, and hot water can be supplied whenever necessary, so that the comfort of the user can be improved.

  In the present embodiment, solar heat during the day is used as needed for heating operation, and the collected solar heat is stored in the heat storage tank 51, and the stored solar heat is stored in the evaporator 7 in the absorption heat pump circuit 1 after sunset. Therefore, it is possible to achieve a high coefficient of performance (COP) for the entire system. Furthermore, since the heat recovered from the combustion exhaust gas can be used for heating the water in the hot water storage tank 31 while the absorption heat pump circuit 1 is in operation, the gas combustion efficiency in the heating source is equivalent to that of the conventional combustion heating water heater. A degree of combustion efficiency can be achieved.

  In addition, in this embodiment, if the water in the hot water storage tank 31 reaches a predetermined temperature only by solar heat during the day, hot water can be supplied without operating the absorption heat pump circuit 1, and the hot water temperature is When the temperature falls below the set temperature, the absorption heat pump circuit 1 can be operated and heated by using hot water in the hot water storage tank 31 heated by solar heat collected in advance as a heat source. Here, the hot water in the hot water storage tank 31 serving as a heat source of the absorption heat pump circuit 1 can be sufficiently utilized even at a low temperature (for example, 30 ° C.). For example, when the amount of sunlight is the same, comparing the heat collection efficiency of 30 ° C and 60 ° C, the heat collection efficiency of 30 ° C is 0.7, and the heat collection efficiency of 60 ° C is 0.45. Since the efficiency becomes 1.6 times higher, the area of the heat collector 45 can be reduced accordingly.

  Next, the operation of the hot water supply operation of the absorption type air conditioning and hot water supply system of the present embodiment will be described with reference to FIG. FIG. 5 has the same apparatus configuration as FIG. In the hot water supply operation, it is possible to perform the cooling operation or the heating operation at the same time. In the following control, the operation described in the cooling operation or the heating operation is performed in the hot water storage tank 31 at the start of the hot water supply operation. It is assumed that warm water heated to a predetermined temperature is stored in advance. Here, the hot water supply operation will be described by dividing it into a terminal hot water supply operation via the first hot water supply route and a hot water filling operation via the second hot water supply route. In the figure, the flow of water in the first hot water supply path is indicated by a solid arrow, and the flow of water in the second hot water supply path is indicated by a dotted arrow.

  In the terminal hot water supply operation, hot water is supplied from the hot water supply terminal 33 through the first hot water supply path when the user opens the faucet or the like of the hot water supply terminal. That is, when the water supplied from the water supply source is supplied to the bottom of the hot water storage tank 31 through the connection pipe 97, the hot water flows out from the top of the hot water storage tank 31 through the connection pipe 99. This hot water is mixed with water flowing in through the connection pipe 95 in the mixing valve 101 at a predetermined mixing ratio and adjusted to a predetermined water temperature, and then flows through the hot water supply pipe 103 and is supplied with hot water from the hot water supply terminal 33. Here, the mixing ratio of the mixing valve 101 is adjusted by the operation control means controlling the operation of the mixing valve 101 according to the setting of the user. In addition, the mixing valve 109 is adjusted to a state in which the valve is closed so that hot water does not flow from the connection pipe 99 through the connection pipe 107.

  In the hot water filling operation, when the user operates a remote controller (not shown) to request the start of the hot water filling operation, hot water is supplied into the bathtub 115 via the second hot water supply path. That is, similar to the terminal hot water supply operation, the hot water that has flowed out from the top of the hot water storage tank 31 through the connection pipe 99 flows through the connection pipe 107 and flows into the mixing valve 109, where it flows through the connection pipe 95 and the connection pipe 105. The water is mixed at a predetermined mixing ratio and adjusted to a predetermined water temperature, and then hot water is supplied into the bathtub 115 via the connection pipe 111 and the bath outlet connection pipe 113. Here, the mixing ratio of the mixing valve 109 is adjusted by the operation control means controlling the operation of the mixing valve 109 according to the setting of the user. Further, the mixing valve 101 is adjusted so that the hot water that has flowed through the connection pipe 99 does not flow into the connection pipe 103.

  Note that the terminal hot water supply operation and the hot water filling operation can be performed simultaneously by controlling the operation of the mixing valves 101 and 109.

  Next, the operation of the bath reheating operation of the absorption type air conditioning and hot water supply system of the present embodiment will be described with reference to FIG. FIG. 6 has the same apparatus configuration as that in FIG. 1, and in the bath reheating operation, it is possible to simultaneously perform the cooling operation and the heating operation. In the following control, it is assumed that hot water heated to a predetermined temperature is stored in advance in the hot water storage tank 31 at the start of the bath reheating operation.

  In the bath chase operation, when the user operates a remote controller (not shown) to request the start of the bath chase operation, the operation control unit starts the operation of the circulation pump 117. Thereby, the bath water starts to circulate in the bath chase circuit. That is, the bathtub water flows in the direction of the arrow, is heated by exchanging heat with the hot water on the top side in the hot water storage tank 31 via the reheating heat exchanger 43, and then returned to the bathtub 115. Here, the flow path of the flow path switching valve 119 is controlled so that the bathtub water extracted from the bathtub 115 does not flow into the bath outlet connection pipe 113 and flow into the bath heat recovery heat exchanger 39. Thus, by circulating the bathtub water in the bath tracking circuit, the temperature of the bathtub water stored in the bathtub 115 can be raised to the set temperature.

  Next, the operation of the bath heat recovery operation of the absorption type air conditioning and hot water supply system of the present embodiment will be described with reference to FIG. FIG. 7 has the same apparatus configuration as FIG. The bath heat recovery operation is intended to increase the water temperature at the bottom of the hot water storage tank 31 by effectively using the heat of the used bath water, and is performed, for example, before the start of the heating operation or during the heating operation. In the following control, it is assumed that bathtub water heated to a predetermined temperature is stored in the bathtub 115 at the start of the bath heat recovery operation.

  The bath heat recovery operation is performed, for example, when the user operates a remote controller (not shown) to start the bath heat recovery operation or when the temperature sensor detects the water temperature in the bath water and the hot water storage tank 31. When it is determined that the control means is necessary, the operation control means operates the circulation pump 117. Thereby, the bath water starts to circulate in the bath heat recovery circuit. That is, the bath water flows in the direction of the arrow, and is exchanged with the water on the bottom side in the hot water storage tank 31 through the bath heat recovery heat exchanger 39 to be dissipated and then returned to the bath 115. By circulating the bath water in the bath heat recovery circuit in this way, the water in the hot water storage tank 31 can be recovered, so that the heat of the used bath water can be used effectively. The operation efficiency of the entire system can be improved.

  Next, the operation of the high-temperature boiling operation of the absorption-type air conditioning and hot water supply system of the present embodiment will be described with reference to FIG. FIG. 8 has the same apparatus configuration as FIG. This high-temperature boiling operation is an operation for boiler-operating the absorption heat pump circuit 1 when there is a special request for hot water supply (for example, 90 ° C.). In this boiler operation, high-temperature refrigerant vapor is generated by setting the heating temperature at which the dilute solution of the regenerator 3 is heated by the heating source in the absorption heat pump circuit 1 to a predetermined temperature higher than the heating temperature in the heating operation, for example. The refrigerant vapor is filled in the condenser 5 and the absorber 9.

  In the high-temperature boiling operation, when the user operates a remote controller (not shown) to start the high-temperature boiling operation, the operation control unit adjusts the heating temperature of the regenerator 3 and operates the circulation pump 77. Operate the hot water circulation circuit. And the condenser 5 and the absorber 9 are connected through the bypass line 137 by controlling operation | movement of the on-off valve 139 so that the on-off valve 139 may open. As a result, the high-temperature refrigerant vapor filling the condenser 5 flows in the direction of the arrow through the bypass pipe 137 and is introduced into the absorber 9 so that the temperatures in the condenser 5 and the absorber 9 become substantially uniform. . On the other hand, in the hot water circulation circuit, hot water (for example, 55 ° C.) extracted from the hot water storage tank 31 flows in the direction of the arrow and passes through the heat exchanger 17 for the condenser and the heat exchanger 21 for the absorber. Is recovered, heated to a high temperature (for example, 90 ° C.), and then returned to the hot water storage tank 31. Accordingly, since hot water (for example, 90 ° C.) is stored on the top side in the hot water storage tank 31, hot water supply can be performed.

  The absorption-type air conditioning system of this embodiment is comprised and accommodated in the housing. In this housing, a hot water storage tank 31, a heat storage tank 51, a control panel including a circuit for operating operation control means, a heat pump unit including an absorption heat pump circuit 1, an equipment unit including each circulation pump, each control valve, and the like Are to be accommodated.

  FIG. 9 is a diagram illustrating an example of a state in which each of these units is accommodated in one housing 143. As shown in the figure, a vertically long heat storage tank 51 and a hot water storage tank 31 are stacked in the vertical direction in the housing 143, and an equipment unit 145, a control panel 147, and a heat pump unit 149 are disposed and housed on both sides thereof. . According to this, since all the units are housed in the common housing 143, it is possible to save labor on site construction.

  FIG. 10 is a diagram illustrating an example of a state where each unit is divided into two housings. As shown in the figure, the housing 151 is housed in a state in which a heat storage tank 51 and a control panel 147 are disposed below and a heat pump unit 149 is disposed thereon. In addition, a vertically long hot water storage tank 31 is arranged in the vertical direction in the housing 153, and a device unit 145 and a control panel 147 are accommodated in the vertical direction. According to this, by dividing the casing into two, the weight of each casing can be reduced and the size can be reduced, so that the degree of freedom in designing the layout can be improved.

DESCRIPTION OF SYMBOLS 1 Absorption-type heat pump circuit 3 Regenerator 5 Condenser 7 Evaporator 9 Absorber 11,57,67,69,77,93,117 Circulation pump 15 2nd solution heat exchanger 17 Heat exchanger for condenser 19 Heat exchange for evaporator Heat exchanger 21 Heat exchanger for absorber 23 Heat source 31 Hot water storage tank 35 Heat exchanger for heat collection 37 Heat exchanger for cooling operation 39 Heat exchanger for bath heat recovery 41 Heat exchanger for heating operation 43 Heat exchanger for reheating 45 Heat collector 51 Heat storage tank 61, 73, 91, 133 Flow path switching valve 65 Exhaust gas heat exchanger 87 Indoor unit 101, 109 Mixing valve 115 Bathtub 127, 129, 137 Bypass pipe 131 Air-cooled heat radiation pipe 139 Open / close valve 141 Remote control

Claims (4)

Regenerator for heating dilute solution in which refrigerant and absorbent are dissolved to separate into concentrated solution and refrigerant vapor, condenser for cooling and condensing refrigerant vapor from said regenerator, and obtained by said condenser An evaporator that evaporates the refrigerant liquid, an absorber that absorbs the refrigerant vapor generated in the evaporator into the concentrated solution from the regenerator, and a circulation pump that pumps the dilute solution from the absorber to the regenerator are connected. An absorption heat pump circuit formed by
A vertically long hot water storage tank having a bottom connected to a water supply source and a top connected to a hot water supply pipe and storing heated hot water;
Water extracted from a position higher than the bottom of the hot water storage tank is heated via at least one of a first heat exchanger disposed in the condenser and a second heat exchanger disposed in the absorber. A hot water circulation circuit for returning to the top side of the hot water storage tank,
Wherein the absorption fourth liquid refrigerant received through a heat exchanger the cold generated in the heat pump circuit disposed within the evaporator, between the third heat exchanger disposed on the bottom side of the hot water storage tank a coolant circulation circuit for cooling the bottom side of the water in the hot water storage tank by circulation between,
Liquid between the fifth heat exchanger disposed on the bottom side in the hot water storage tank or the sixth heat exchanger disposed above the fifth heat exchanger in the hot water storage tank and the cooling / heating heat load. An absorption-type air-conditioning hot-water supply system comprising an air-conditioning circuit for circulating a refrigerant. A first heat collecting refrigerant circulation circuit for circulating the liquid refrigerant between a heat collector that collects solar heat and a heat storage tank that stores the liquid refrigerant heated by the heat collector;
A seventh heat exchanger that is provided in a refrigerant flow path through which the dilute solution fed from the absorber to the regenerator flows and exchanges heat between the liquid refrigerant that exits the heat storage tank and the dilute solution;
The absorption-type air-conditioning hot-water supply system of Claim 1 provided with the 2nd heat collection refrigerant | coolant circulation circuit which circulates a liquid refrigerant between the said 7th heat exchanger and the said thermal storage tank. In the combustion chamber of the fuel for heating the dilute solution of the regenerator, an exhaust gas flow path through which the combustion exhaust gas of the fuel flows is provided,
In the second heat collecting refrigerant circulation circuit, the liquid refrigerant flowing into the heat storage tank via the seventh heat exchanger, the liquid refrigerant flowing through the flow path, and the combustion exhaust gas flowing through the exhaust gas flow path are provided. The absorption-type air-conditioning hot-water supply system of Claim 2 with which the 8th heat exchanger which heat-exchanges is arrange | positioned. A bypass pipe for bypassing the outlet side of the fourth heat exchanger and the inlet side of the third heat exchanger of the refrigerant circuit with the second heat collecting refrigerant circuit;
First flow path switching means provided in the bypass pipeline,
The first flow path switching means is a flow path in which liquid refrigerant flowing through the refrigerant circulation circuit passes through at least the heat storage tank via the bypass pipe when heating operation or boiling operation of the hot water storage tank is performed. The absorption-type air-conditioning hot-water supply system of Claim 2 or 3 formed so that it may switch to.

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