WO2012161457A2

WO2012161457A2 - Heat pump system

Info

Publication number: WO2012161457A2
Application number: PCT/KR2012/003821
Authority: WO
Inventors: 진주환
Original assignee: Jin Ju-Hwan
Priority date: 2011-05-23
Filing date: 2012-05-16
Publication date: 2012-11-29
Also published as: WO2012161447A2; WO2012161447A3; WO2012161457A3; KR101218546B1; KR20120130358A

Abstract

The present invention relates to a heat pump system, and more specifically, to hot water generation of an air heat source type heat pump system, and a defrosting and cooling structure of an outdoor heat exchanger, for simplifying the structure thereof, increasing the efficiency of use of a costless heat source, enhancing the coefficient of performance to a satisfactory level, and generating hot water at all times. The present invention comprises: a basic freeze cycle (10) for connecting the major components with a refrigerant conduit; a hot water heating circuit (20) mounted between a compressor (11) and a 4-way valve (12) of the refrigerant conduit; a defrosting means (30) for forming a condenser (32) between an expansion valve for cooling (14) and an expansion valve for heating (15) of the refrigerant conduit, surrounding the condenser (32) with a heat storage tank (33) having inserted therein a heat storage medium, mounting an auxiliary heat exchanger (34) on the outdoor heat exchanger (16), so that the heat storage tank (33) and the auxiliary heat exchanger (34) are connected so as to form a heat storage medium closed circulation circuit; a defrosting and cooling means (40) having a heat exchanger (41) formed on a heat medium conduit (43) by connecting both ends of the heat medium conduit (43) on the back of a heat storage medium circulation pump (36) of a heat storage medium supply pipe (35a), and having a costless heat source storage tank (42) formed on the heat exchanger (41) and also forming a heat medium closed circulation circuit by coupling the costless heat source storage tank (42) with a heat storage medium closed circulation circuit formed on the defrosting means (30), thereby circulating the heat medium to the auxiliary heat exchanger (34); and performance enhancing means (50) mounted on the exit side of the heat exchanger (41) of the heat medium conduit (43) and between the outdoor heat exchanger (16) and 4-way valve (12) of the refrigerant conduit (17).

Description

Heat pump system

The present invention relates to a heat pump system, and more particularly, to hot water generation of an air heat source heat pump system, and to defrost and cooling structure of an outdoor heat exchanger.

As is well known, the heat pump operates the steam compression refrigeration cycle in the opposite direction to the cooling (freezing) operation, i.e., the indoor heat exchanger acts as the condenser and the outdoor heat exchanger as the evaporator during the heating operation, and the outdoor heat exchanger during the cooling operation. In order to improve the coefficient of performance, the refrigerant is evaporated or condensed in the outdoor heat exchanger.

However, the air heat source heat pump is installed to expose the outdoor heat exchanger to the outside air to evaporate or condense the refrigerant by the outside air, and especially on the surface of the outdoor heat exchanger acting as an evaporator when the outside air temperature falls below the dew point temperature during the heating operation. Condensation of the refrigerant liquid in the outdoor heat exchanger, which acts as a condenser when the frost condenses, may cause the evaporation of the refrigerant gas to decrease or become impossible, leading to a significant drop in the coefficient of performance or to an inoperability. The poor coefficient of performance is deteriorating, and the above-mentioned problem has been solved, which is one of the key topics in the development of heat pump technology.

In order to solve the degradation or inoperability of the above-mentioned problems during the heating operation, the refrigeration cycle is converted into a reverse cycle, that is, the outdoor heat exchanger acting as an evaporator is acted as a condenser, or an electrothermal heater is installed in the outdoor heat exchanger. It is well known to deteriorate the coefficient of frost by defrosting the frost attached to the surface, but the former causes the heating operation to be stopped, and the latter is not only to improve the coefficient of coefficient but also requires extra energy.

On the other hand, in recent years, the reduction of environmental pollution and energy cost due to air pollution has emerged as a social problem, and in particular, all industries are striving to solve the above-mentioned social problems. The use of is becoming common.

Regarding the defrosting and cooling promotion structure of the outdoor heat exchanger of the air heat source heat pump system which corrects the problems caused by the above-mentioned well-known defrosting technique, namely, the reverse cycle operation and the installation of the electric heater, and improves the coefficient of performance by the non-heating heat source. The invention is disclosed in Patent Document 1.

The defrosting and cooling promotion structure of the outdoor heat exchanger of the air heat source heat pump system of Patent Document 1 includes a compressor, a four-way valve, an indoor heat exchanger, a cooling expansion valve, a heating expansion valve, an outdoor heat exchanger, and the four-way. A basic refrigeration circuit connecting the valves in order to the refrigerant conduit and connecting the four-way valve and the compressor to the refrigerant suction conduit; Both ends of the bypass refrigerant conduit are connected between the cooling and heating expansion valves of the refrigerant conduit to install a heating heat exchanger in the bypass refrigerant conduit, and surround the heating heat exchanger and install a heat medium therein. Injected heat storage tank; An auxiliary heat exchanger installed in the outdoor heat exchanger by connecting a heat medium supply pipe having a heat medium circulation pump to the heat storage tank and a heat medium return pipe; A heat exchanger is installed in the heat medium supply pipe and the heat medium return pipe, and a heat medium supply pipe and a heat medium return pipe are installed in the heat medium supply pipe and the heat medium return pipe, and an outdoor heat exchanger defrosting and cooling means is provided around the heat exchanger. will be.

The defrosting and cooling facilitation structure of the outdoor heat exchanger of the air heat source heat pump system is a heat medium that maintains a constant temperature by maintaining a constant temperature by heat-exchanging the heat source circulating the heat source and the heat medium circulating in the heat source storage tank. Is circulated to the auxiliary heat exchanger installed in the outdoor heat exchanger to defrost the frost attached to the outdoor heat exchanger during the heating operation and to cool the outdoor heat exchanger during the cooling operation to improve the coefficient of performance.

When the heating medium is heated by the non-heating heat source as described above, if no heating source is generated or small, the heating medium heated by the condensation heat when the refrigerant liquid passing through the heating heat exchanger installed in the heat storage tank is recondensed. By circulating the heat exchanger to maintain good coefficients during heating operation, the heat storage tank by cooling by heating the heat exchanger by the detection signal of the temperature sensor when the refrigerant liquid discharged from the indoor or outdoor heat exchanger is a certain temperature or more By lowering the temperature, the evaporation of the refrigerant liquid in the indoor or outdoor heat exchanger is improved.

[Patent Document 1] KR 10-0970870 (B1)

However, the defrosting and cooling promotion structure of the outdoor heat exchanger of the air heat source heat pump system is based on the heating medium supply pipe and the heating medium return pipe of the auxiliary heat exchanger when the auxiliary heat exchanger and the outdoor heat exchanger defrosting and cooling means are combined. And a brine (heat medium) supply pipe and a brine (heat medium) return pipe of the cooling means, and a circulation pump and a solenoid valve are installed in the heat medium supply pipe and the brine (heat medium) supply pipe, respectively, so that the structure is complicated and the euro friction is large. The heat cycle is not desired.

A forced convection type outdoor heat exchanger installed with a fan must be used to use the heat source (latent heat) contained in the air well when evaporating or condensing the refrigerant liquid or refrigerant vapor circulating in the outdoor heat exchanger. When defrosting the frost attached to the outdoor heat exchanger by driving the fan while circulating the heat medium (Brine) of a certain temperature (about 20 ° C) heat exchanged in a heat-free heat source tank to an auxiliary heat exchanger installed in a forced convection outdoor heat exchanger as shown in FIG. As the retention heat of the heat medium heat-exchanged with the no-heat heat source by the suction force or the pressure of the heat is lost (discharged) to the air, the utilization efficiency of the no-heat heat source is low, and the utilization coefficient of the no-heat heat source is low as described above. There is also a problem that is poor.

The present invention corrects the above problems, simplifies the structure of the heat storage tank, defrosting and cooling means, facilitates circulation of the heat medium, and utilizes the non-heat source when circulating the heat medium heat-exchanged with the heat source for the outdoor heat exchanger. It is an object of the present invention to provide an air heat source heat pump system capable of improving efficiency, improving the coefficient of performance well, and generating good multi-purpose hot water at all times during a heating operation or a cooling operation.

In order to achieve the above object, the present invention is connected to the compressor, 4-way valve, indoor heat exchanger, cooling expansion valve, heating expansion valve, outdoor heat exchanger and the 4-way valve in order to the refrigerant conduit, A basic refrigeration cycle connecting the way valve and the compressor to the refrigerant suction conduit; A hot water heating circuit disposed between the compressor of the refrigerant conduit and the 4-way valve; A refrigerant bypass conduit is connected between the cooling expansion valve and the heating expansion valve of the refrigerant conduit to form a condenser in the refrigerant bypass conduit, and the condenser is surrounded by a heat storage tank in which a heat storage medium is injected. A defrosting means having an auxiliary heat exchanger connected to the heat storage tank and the auxiliary heat exchanger such that a heat storage medium circulation circuit is formed by a heat storage medium supply pipe having a heat storage medium circulation pump and a heat storage medium return pipe; By connecting both ends of the heat medium conduit to the heat storage medium circulation pump of the heat storage medium supply pipe, a heat exchanger is formed in the heat medium conduit, a heat source storage tank for the heat exchanger is formed in the heat exchanger, and the heat storage medium waste circulation formed in the defrosting means. Defrosting and cooling means combined with a circuit to form a heat medium closed circulation circuit for circulating a heat medium in said auxiliary heat exchanger; And a performance improving means installed between the outlet side of the heat exchanger of the heat medium conduit and the outdoor heat exchanger and the 4-way valve of the refrigerant conduit.

As described above, the present invention circulates the heat storage medium heated by the condensation heat of the refrigerant liquid in the heat storage tank in the heat storage tank to the auxiliary heat exchanger installed in the outdoor heat exchanger to prevent frost from being attached to the outdoor heat exchanger or to defrost the frost attached thereto. During operation and cooling operation, the heat medium for circulating the heat source and the heat exchanger is heated or cooled in a heat-free storage tank for heat, and the heated or cooled heat medium is circulated to the auxiliary heat exchanger to perform defrost or the like as described above. In case of heating operation by heat medium heated by non-heating source even if driving fan installed in outdoor heat exchanger during condensation, after discharging the heat medium heated in heat exchanger from heat radiation heat exchanger of performance enhancing means to lower the temperature Bag of heat released to the atmosphere by the fan by circulating an auxiliary heat exchanger By preventing the rain and supplying the heat of the heat dissipating heat exchanger to the endothermic and heat dissipating heat exchanger, the wet-saturated steam evaporated from the outdoor heat exchanger can be dried or superheated. In addition to preventing damage, you can improve your score.

In the case of the cooling operation, the refrigerant vapor of the high temperature and high pressure compressed by the compressor is first condensed in the endothermic and radiant heat exchanger of the performance improving means before condensing in the outdoor heat exchanger, and then condensed in the outdoor heat exchanger. Since this is good, this is also a factor for improving the coefficient of performance, and thus can improve the performance.

In addition, the present invention is simplified by combining the heat storage medium circulation circuit and the heat medium circulation circuit in a simple structure to reduce the cost and easy construction, and in particular, the outdoor heat exchange without a circulation obstacle due to the low flow resistance during the heat storage medium and heat medium circulation Defrosting and cooling of group can be performed favorably.

In addition, the present invention is to improve the quality of life even more by using a multi-purpose to always produce hot water at the same time heating operation or cooling operation.

1 is a block diagram of an embodiment of the present invention.

1 is a block diagram of an embodiment of the present invention, in FIG. 1, 10 is a basic refrigeration cycle, the basic refrigeration cycle 10 is a compressor 11, a four-way valve 12, an indoor heat exchanger 13 The cooling expansion valve 14, the heating expansion valve 15, the outdoor heat exchanger 16, and the four-way valve 12 are sequentially connected to the refrigerant conduit 17, and the four-way valve 12 is connected. And the compressor 11 connected to the refrigerant suction conduit 18, the basic refrigeration cycle 10 is based on the air heat source type.

The hot water heating circuit 20 is installed between the compressor 11 of the refrigerant conduit 17 and the four-way valve 12 to always supply hot water at the same time as the operation of the basic refrigeration cycle 10, that is, heating operation or cooling operation. Generated and used for bathing or hot water supply, or as other radiant heat generating means, and supplied to the floor-mounted heat dissipation coil, radiator and fan coil unit installed at a different position from the indoor heat exchanger 13 or a different position from the indoor heat exchanger 13. To use for heating or drying.

The hot water heating circuit 20 connects both ends of the refrigerant vapor bypass conduit 21 at regular intervals between the compressor 17 of the refrigerant conduit 17 and the four-way valve 12 to provide the refrigerant vapor bypass conduit. A condenser 22 is provided at the 21, a heating heat exchanger 23 is provided at the condenser 22 to maintain a heat exchange relationship with the condenser 22, and a heating bath with the heating heat exchanger 23 is provided. 24 is connected to a suction pipe 25b provided with a supply pipe 25a and a circulation pump 26, the inlet of the refrigerant vapor bypass conduit 21 and the refrigerant vapor bypass conduit of the refrigerant conduit 17 ( The

solenoid valves

27a and 27b are provided between the connecting portions of both ends 21 so that the refrigerant vapor compressed by the compressor 11 flows into the refrigerant vapor bypass conduit 21. 22 to heat the hot water flowing through the heating heat exchanger 23 by the heat of the condensation And stored in a low tangjo 24 is used for the required purpose.

30 is a defrosting means, and the defrosting means 30 connects the refrigerant bypass conduit 31 at regular intervals between the cooling expansion valve 14 and the heating expansion valve 15 of the refrigerant conduit 17. To form a condenser 32 in the refrigerant bypass conduit 31, surround the condenser 32 with a heat storage tank 33 into which a heat storage medium is injected, and assist between the heat transfer tubes of the outdoor heat exchanger 16. The heat exchanger tube of the heat exchanger 34 is installed, the auxiliary heat exchanger 34 is integrally formed on the side of the outdoor heat exchanger 16 by integrally fining, or is separately formed on the side of the outdoor heat exchanger 16. An auxiliary heat exchanger (34) of the heat storage tank (33) and the auxiliary heat exchanger (34) are connected to the heat storage medium supply pipe (35a) having the heat storage medium circulation pump (36) and the heat storage medium return pipe (35b). To form a closed circuit for the heat storage medium.

And a three-way valve 47 is installed at the inlet side connection portion of the refrigerant conduit 17 and the refrigerant bypass conduit 31 so that the refrigerant liquid flows into the refrigerant conduit 17 normally. When the temperature sensor 37 is installed on the outlet side of the indoor heat exchanger 13 during the heating operation and the temperature of the refrigerant liquid on the outlet side of the indoor heat exchanger 13 is higher than the set temperature (eg 35 ° C.), the 3-way valve ( 47) is switched to the refrigerant bypass conduit 31 to condense the refrigerant liquid above the set temperature in the condenser 32 to prevent the specific volume of the refrigerant liquid supplied to the outdoor heat exchanger 16 from decreasing, resulting in a decrease in the coefficient of performance. The heat storage medium is heated by the condensation heat of the condenser 32 and stored in the heat storage tank 33 and used for defrosting the outdoor heat exchanger 16 during the heating operation.

40 denotes defrosting and cooling means, and the defrosting and cooling means 40 is connected to both ends of the heat medium conduit 43 at regular intervals to the rear of the heat storage medium circulation pump 36 of the heat storage medium supply pipe 35a. The heat exchanger 41 is formed in the heat medium conduit 43, and the heat source storage tank 42 for the heat exchanger 41 is formed, and the heat storage medium closed circulation circuit of the defrosting means 30, that is, auxiliary heat exchange. Unit 34, heat storage medium return pipe 35b, heat storage tank 33, heat storage medium circulation pump 36, and heat storage medium supply pipe 35a to form a heat medium closed circulation circuit. It is to inject the heat medium (material having low freezing temperature such as ethylene glycol).

In addition, a three-way valve 46 is provided at the inlet connection portion of the heat medium conduit 43 of the heat storage medium supply pipe 35a, and is installed in the temperature sensor 45a installed in the heat storage tank 33 and the heat source storage tank 42 for the film. When the three-way valve 46 is switched to open toward the higher detection value of one temperature sensor 45b, that is, when the temperature of the heat storage medium heated in the heat storage tank 33 is high during the heating operation, the heat storage medium is transferred to the auxiliary heat exchanger 34. When the outdoor heat exchanger 16 is circulated to defrost the heat exchanger 41 and the temperature of the heat medium to be heat-exchanged with the non-heat heat source is high, the heat medium is circulated to the auxiliary heat exchanger 34 to circulate the heat exchanger 41. It is to perform defrost. In the cooling operation, the heat medium that is exchanged with the heat source for cooling while circulating the heat exchanger 41 is circulated through the auxiliary heat exchanger 34 to cool the outdoor heat exchanger 16.

The heat source supplied to the unheated heat source storage tank 42 is to prevent environmental destruction by using renewable energy such as river water, sea water, groundwater collected, solar heat collecting device (air or hot water), rainwater, waste water, etc. The higher the temperature of the non-heating heat source is, the higher the temperature is particularly good in a cold operation, and the temperature is not to exceed 25 ° C in the cooling operation.

50 is a performance improving means, wherein the performance improving means 50 is formed between the outlet of the heat exchanger 41 of the heat medium conduit 43 and the outdoor heat exchanger 16 of the refrigerant conduit 17 and the 4-way valve 12. In the heating operation, the wet saturated vapor sucked into the compressor 11 is heated by the heat of retaining of the heat medium, and during the cooling operation, the high-temperature / high-pressure refrigerant vapor compressed by the compressor 11 is heated in the outdoor heat exchanger 16. ) To be cooled first before being supplied.

The performance improving means (50) is provided with a heat dissipation heat exchanger (51) at the outlet side of the heat exchanger (41) of the heat medium conduit (43), and the 4-way heat exchanger (16) with the outdoor heat exchanger (16). An endothermic and heat dissipation heat exchanger 52 is installed between the valves 12 so as to maintain a heat exchange relationship with the heat dissipation heat exchanger 51.

A bypass conduit 48 for bypassing the heat dissipation heat exchanger 51 is connected to an outlet side of the heat exchanger 41 of the heat medium conduit 43, and the bypass conduit 48 of the heat medium conduit 43. A three-way valve 49 is provided at the inlet side connection of the heating medium so that the heating medium is supplied to the heat radiating heat exchanger 51 during the heating operation, and the heating medium flows into the bypass conduit 48 during the cooling operation. In addition to preventing heating, condensation of the refrigerant vapor in the endothermic and heat dissipating heat exchanger 52 is improved.

Reference numeral 28a is a water supply pipe, 28b is a hot water supply pipe, and 61, 62, 63, and 64 are check valves. In addition, the outdoor heat exchanger 16 is provided with a suction type or a pressurized fan (not shown) to improve the evaporation of the refrigerant liquid and the condensation of the refrigerant vapor, which is well known in an air heat source heat pump.

In the present invention as described above, the indoor heat exchanger 13 is heated by operating the 4-way valve 12 so that the refrigerant flows in the solid line of the arrow in FIG. 1 during the heating operation and in the virtual line of the arrow in the cooling operation. It functions as a condenser at the time of operation and as an evaporator at the time of cooling operation, and functions as a heating function and a cooling function is the same as the conventional thing.

When the temperature of the coolant liquid detected by the temperature sensor 37 installed in the refrigerant conduit 17 on the outlet side of the outdoor heat exchanger 13 during the heating operation as described above becomes 3 or more (eg 35 ° C.) As the way valve 47 is switched to the refrigerant bypass conduit 31 and opened, the high temperature refrigerant liquid circulating in the refrigerant conduit 17 flows into the refrigerant bypass conduit 31 and recondenses through the condenser 32. Since the temperature is lowered and then supplied to the outdoor heat exchanger 16, the evaporation of the refrigerant liquid in the outdoor heat exchanger 16 becomes good, and the compressor 11 maintains a normal temperature when the refrigerant gas is compressed. If the detected value of the sensor 37 is below a certain temperature, the three-way valve 47 is switched to the normal position and the refrigerant bypass conduit 31 is closed.

On the other hand, the heat storage medium heated by the heat of condensation of the refrigerant liquid as described above is stored in the heat storage tank 33 and the outdoor heat exchanger 16 when the outside air temperature is lower than the set temperature (eg 10 ° C.) or lower than the dew point temperature during the heating operation. ) Is used for defrost.

As described above, when the outside air temperature is lower than or equal to the set temperature (eg, 10 ° C.) or lower than the dew point temperature during the heating operation, the heat storage medium stored in the heat storage tank 33 and the non-heat heat source supplied to the non-thermal heat source storage tank 32. By circulating the heat exchanger 41 by means of circulating heat exchanger 41 selectively to the auxiliary heat exchanger 34 installed in the outdoor heat exchanger 16, the frost is attached by heating the heat pipes and fins of the outdoor heat exchanger 16. To prevent or defrost the frost attached.

The method of selectively circulating the heat storage medium and the heat medium in the auxiliary heat exchanger 34 installed in the outdoor heat exchanger 16 may be installed in the temperature sensor 45a installed in the heat storage tank 33 and the heat source storage tank 32 for free use. The 3-way valve 46 is switched to open so that the heat storage medium or heat medium having the higher detection value is circulated to the auxiliary heat exchanger 34 by the detection value of the temperature sensor 35b, that is, the temperature of the heat storage medium is When the temperature is higher than the temperature, the heat storage medium stored in the heat storage tank 33 circulates through the auxiliary heat exchanger 34 installed in the outdoor heat exchanger 16 by the heat storage medium circulation pump 36 via the heat storage medium supply pipe 35a. After heat-transferring the heat transfer tube and fin of the heat exchanger 16 to perform defrosting, and then form a heat storage medium closed circulation circuit which returns to the heat storage tank 33 via the heat storage medium return pipe 35b, For movies stored in 42) When the temperature of the heat source is higher than the temperature of the heat storage medium stored in the heat storage tank 33, the heat source for heat transfer from the heat exchanger 41 and the non-heat heat source supplied to the heat-free storage source 32 for heat is installed in the outdoor heat exchanger 16. Auxiliary heat exchanger (34), heat storage medium return pipe (35b), heat storage tank (33), heat storage medium supply pipe (35a), heat storage medium circulation pump (36), 3-way valve (46) and heat medium conduit (43) and heat exchanger Defrosting and the like in the auxiliary heat exchanger 34 are carried out in the same manner as the heat storage medium while forming the heat medium closed circulation circuit formed by (41).

On the other hand, during the cooling operation, the function of the heat storage tank 33 is stopped while the heat medium waste circulation circuit performs the function, and during the cold operation, the heat medium waste circulation circuit is operated in the same manner as in the heating operation. When the heat medium cooled by heat exchange with the heat source is circulated through the auxiliary heat exchanger 34 as in the heating operation, the heat transfer to the heat transfer tube and the fin of the outdoor heat exchanger 16 promotes the condensation of the refrigerant vapor, thereby improving the coefficient of performance. will be.

When the above and the heat medium circulation circuit performs a function, the temperature of the non-heat source for heat is better in cold weather during heating operation, and it is good not to exceed 25 degreeC in cooling operation.

When the heat medium heat-exchanged in the heat exchanger 41 is circulated to the auxiliary heat exchanger 34, the 3-way valve 49 is operated so that the heat medium flows to the heat radiating heat exchanger 51 during the heating operation. The heat medium passing through (51) is evaporated from the outdoor heat exchanger (16), and then radiates to the wet vaporized steam sucked into the compressor (11) via the endothermic and heat radiating heat exchanger (52), thereby lowering its temperature. After the heat is dissipated in the auxiliary heat exchanger 34 installed in the outdoor heat exchanger 16, the heat retention of the heat medium is reduced to the atmosphere even when the fan is driven, thereby improving the utilization efficiency of the heat source for the non-heating and improving the coefficient of performance. It can be.

As described above, when the saturated vapor or the superheated vapor is heated by heat-exchanging the wet saturated vapor which is evaporated in the outdoor heat exchanger 16 and sucked into the compressor 11 with the heat medium circulating through the heat radiating heat exchanger 51, the steam is saturated or dried. By preventing the liquid bag or liquid to be generated in the), it is possible to improve the reliability of the compressor (11) and improve the coefficient of performance.

As described above, during the cooling operation when the heat medium heat-exchanged in the heat exchanger 41 is circulated to the auxiliary heat exchanger 34, the high-temperature / high-pressure refrigerant vapor compressed by the compressor 11 is transferred to the outdoor heat exchanger 16. Since the condensation of the refrigerant vapor is good as it is condensed in the outdoor heat exchanger 16 after the first condensation while passing through the endothermic and heat dissipating heat exchanger 52 before condensation, this is also an improvement factor of the coefficient of performance. At this time, the three-way valve 49 is operated so that the heat medium flows to the bypass conduit 48 side, thereby preventing the heat medium from being heated by the heat of release of the endothermic and heat dissipating heat exchanger 52. Only the following heat medium is circulated to improve the condensation of the refrigerant vapor.

In the present invention, the heat storage medium circulation pump 36 is installed only in the heat storage medium supply pipe 35a, and both ends of the heat medium conduit 43 are connected to the heat storage medium supply pipe 35a, thereby providing the heat medium conduit 43 and the heat exchanger. (41) and the heat storage medium closed circulation circuit of the defrosting means 20, that is, the auxiliary heat exchanger 34, the heat storage medium return pipe 35b, the heat storage tank 33, the heat storage medium circulation pump 36, and the heat storage medium supply pipe 35a. By combining to form a heat medium circulation circuit, the structure is simplified to reduce the cost, it is possible to perform a good defrost and cooling operation of the outdoor heat exchanger without a circulation obstacle of the heat medium.

When the hot water is to be generated during the heating operation or the cooling operation as described above, the solenoid valve 27a is opened and the solenoid valve 27b is kept open or fully closed or partially closed. All or part of the high-temperature and high-pressure refrigerant vapor compressed in (11) flows into the above-mentioned heating circuit or cooling circuit while condensing in the condenser 22 while flowing into the refrigerant vapor bypass conduit 21, and the refrigerant in the condenser 22. The condensation heat when the steam is condensed is exchanged with the hot water to be heated flowing in the heating heat exchanger 23 to heat the hot water and stored in the water storage tank 24 along the supply pipe 25a and also by the circulation pump 26. It is heated by the heat of condensation of the refrigerant vapor while repeatedly flowing through the heat exchanger (23). The heated hot water is used for multipurpose purposes such as bathing, hot water supply, heating, drying and the like. And the opening and closing amount of the solenoid valve (27a) (27b) can be adjusted according to the production amount of hot water or the purpose of use of the indoor heat exchanger (13).

Claims

A compressor, a 4-way valve, an indoor heat exchanger, a cooling expansion valve, a heating expansion valve, an outdoor heat exchanger, and the 4-way valve are sequentially connected to the refrigerant conduit, and the 4-way valve and the compressor are connected to the refrigerant suction conduit. A basic refrigeration cycle; A hot water heating circuit disposed between the compressor of the refrigerant conduit and the 4-way valve; A refrigerant bypass conduit is connected between the cooling expansion valve and the heating expansion valve of the refrigerant conduit to form a condenser in the refrigerant bypass conduit, and the condenser is surrounded by a heat storage tank in which a heat storage medium is injected. A defrosting means having an auxiliary heat exchanger connected to the heat storage tank and the auxiliary heat exchanger such that a heat storage medium circulation circuit is formed by a heat storage medium supply pipe having a heat storage medium circulation pump and a heat storage medium return pipe; A heat exchanger is formed in the heat medium conduit by connecting both ends of the heat medium conduit to the heat storage medium circulation pump of the heat storage medium supply pipe, and a heat source storage tank for the heat exchanger is formed, and the heat storage medium closed circulation circuit formed in the defrosting means; Defrosting and cooling means combined with each other to form a heat medium closed circulation circuit to circulate the heat medium to the auxiliary heat exchanger; And a performance improving means installed between the outlet side of the heat exchanger of the heat medium conduit and the outdoor heat exchanger of the refrigerant conduit and the 4-way valve.
The hot water heating circuit of claim 1, wherein both ends of the refrigerant vapor bypass conduit are connected between the compressor of the refrigerant conduit and the four-way valve to install a condenser in the refrigerant vapor bypass conduit, wherein the condenser is connected to the condenser and the heat exchanger. A heat pump system in which a heating heat exchanger is installed to maintain a relationship, and the heating heat exchanger and the storage tank are connected to a suction pipe provided with a supply pipe and a circulation pump.
The heat dissipation heat exchanger is installed at the heat exchanger outlet side of the heat medium conduit, and the endothermic and heat dissipation heat exchanger between the outdoor heat exchanger and the 4-way valve of the refrigerant conduit can maintain a heat exchange relationship with the heat dissipation heat exchanger. Installed heat pump system.
4. The heat pump system according to claim 3, wherein a bypass conduit for bypassing the heat dissipation heat exchanger is connected to the heat medium conduit, and a 3-way valve is provided at an inlet side connection part of the heat medium conduit and the bypass conduit.