A heat management system for the linkage of a dryer and an air conditioner

Abstract

The present invention discloses a thermal management system for the interconnection of a dryer and an air conditioner, which includes an air conditioner temperature control unit, a drying cycle unit, and a flow path regulation unit. The air conditioner temperature control unit includes a compressor, a condenser, an expansion valve, and an evaporator. The drying cycle unit includes a plate heat exchanger, a fan coil unit, a circulation pump, a heat storage barrel, and a laundry barrel. The flow path regulation unit includes a switching valve, a first valve, a second valve, a third valve, and a fourth valve. By adjusting the opening and closing states of the valves and the opening states of different flow paths of the switching valve, the present invention controls the air conditioner temperature control unit to be in a refrigeration cycle state, a refrigeration heat storage cycle state, or a refrigeration drying cycle state, and controls the drying cycle unit to be in a heat storage drying cycle state and a heat pump drying cycle state, realizing the combination of hot water laundry, drying, and room cooling, and recovering the waste heat of the air conditioner refrigeration condition through the heat storage barrel, thereby improving the comprehensive performance of the household energy thermal management system while improving the energy utilization rate.

Description

Technical Field

[0001] The present invention relates to the technical field of clothes dryers, and particularly to a heat management system for the linkage of a clothes dryer and an air conditioner. Background Art

[0002] At present, most clothes dryers use PTC electric heating to dry clothes. Such devices are large in volume, occupy a large area, consume a high amount of electricity and are not energy-saving. At the same time, the hot water used for washing in washing machines is directly heated by electric energy, which is not energy-saving. Users are in urgent need of a device that can efficiently produce hot water for washing in washing machines, dry clothes with high quality, and is significantly energy-saving. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an object of the present invention is to provide a heat management system for the linkage of a clothes dryer and an air conditioner. Through the combined system of the clothes dryer and the air conditioner, the waste heat of the air conditioner is fully recovered and utilized, achieving multiple functions with one device; saving energy and reducing costs. At the same time, the heat pump system is used to replace electric heating to heat the cold water for washing and dry clothes, greatly improving the utilization efficiency of electric energy.

[0004] A heat management system for the linkage of a clothes dryer and an air conditioner according to the present invention includes an air conditioner temperature control unit, a clothes drying circulation unit, and a flow path regulation unit. The air conditioner temperature control unit includes a compressor, a condenser, an expansion valve, and an evaporator. The clothes drying circulation unit includes a plate heat exchanger, a fan coil unit, a circulation pump, a heat storage barrel, and a washing barrel. The flow path regulation unit includes a switching valve, a first valve, a second valve, a third valve, and a fourth valve;

[0005] The gaseous outlet of the evaporator is connected to the intake port of the compressor. The plate heat exchanger and the first valve are connected in parallel to form a first working selection branch of the plate heat exchanger. The condenser and the second valve are connected in parallel to form a condenser working selection branch. The exhaust port of the compressor is sequentially connected to the liquid inlet of the evaporator through the first working selection branch of the plate heat exchanger, the condenser working selection branch, and the expansion valve;

[0006] The plate heat exchanger and the third valve are connected in parallel to form a second working selection branch of the plate heat exchanger. One side of the second working selection branch of the plate heat exchanger is respectively connected to the water inlet of the heat storage barrel and the fourth valve connected to tap water. The other side of the plate heat exchanger and the third valve connected in parallel to form the second working selection branch of the plate heat exchanger is connected to the water outlet of the fan coil unit. The water outlet of the heat storage barrel is connected to the water inlet of the circulation pump. The water outlet of the circulation pump is connected to the water inlet of the switching valve. The first switching flow path of the switching valve is connected to the washing barrel. The second switching flow path of the switching valve is connected to the water inlet of the fan coil unit.

[0007] Preferably, when the first valve is in the open state, the second valve, the third valve, and the fourth valve are in the closed state, and the first switching flow path of the switching valve is in the closed state, the air-conditioning temperature control unit is in the refrigeration cycle state. In the refrigeration cycle state of the air-conditioning temperature control unit, the gaseous working medium in the evaporator is compressed by the compressor and then enters the intake pipe of the condenser. The gas-liquid mixture output by the condenser returns to the evaporator through the expansion valve. After the evaporator cools the air-conditioning air, it forms a gaseous working medium again and enters the intake port of the compressor.

[0008] Preferably, when the second switching flow path of the switching valve is in the open state, and the first valve, the second valve, the third valve, and the fourth valve are in the closed state, the air-conditioning temperature control unit is in the refrigeration and heat storage cycle state. In the refrigeration and heat storage cycle state of the air-conditioning temperature control unit, the gaseous working medium in the evaporator is compressed by the compressor and then enters the refrigerant flow path of the plate heat exchanger. The compressed working medium absorbs heat from the low-temperature water on the water side of the plate heat exchanger and then enters the intake pipe of the condenser. The working medium output by the condenser returns to the evaporator through the expansion valve. After the evaporator cools the air-conditioning air, it forms a gaseous working medium again and enters the intake port of the compressor. At the same time, the water on the water side of the plate heat exchanger enters the heat storage barrel after absorbing heat.

[0009] Preferably, in the refrigeration and heat storage cycle state of the air-conditioning temperature control unit, the water in the heat storage barrel is pressurized by the circulation pump and flows through the fan coil unit and then enters the water side of the plate heat exchanger.

[0010] Preferably, when the third valve is in the open state, and the first valve, the second valve, and the fourth valve are in the closed state, the clothes drying cycle unit is in the heat storage clothes drying cycle state. In the heat storage clothes drying cycle state of the clothes drying cycle unit, the water outlet of the heat storage barrel is sequentially connected to the water inlet of the washing barrel through the circulation pump and the first switching flow path of the switching valve. The water outlet of the heat storage barrel is sequentially connected to the water inlet of the heat storage barrel through the circulation pump, the second switching flow path of the switching valve, the fan coil unit, and the third valve.

[0011] Preferably, when the second valve is in the open state and the first valve and the third valve are in the closed state, the drying cycle unit is in the heat pump drying cycle state. In the heat pump drying cycle state of the drying cycle unit, the water outlet of the heat storage barrel is sequentially connected to the water inlet of the washing barrel through the circulation pump and the first switching channel of the switching valve. The water outlet of the heat storage barrel is sequentially connected to the water inlet of the heat storage barrel through the circulation pump, the second switching channel of the switching valve, the fan coil unit, and the water side channel of the plate heat exchanger. The gaseous working medium in the evaporator is compressed by the compressor and then enters the refrigerant channel of the plate heat exchanger. The compressed working medium absorbs heat from the low-temperature water on the water side of the plate heat exchanger and then enters the expansion valve and returns to the evaporator. After the evaporator absorbs heat and warms up, it forms gaseous working medium again and enters the intake port of the compressor.

[0012] Preferably, when the first valve, the second valve, and the third valve are in the closed state, the whole machine system is in the refrigeration drying cycle state. In the refrigeration drying cycle state of the whole machine system, the gaseous working medium in the evaporator is compressed by the compressor and then enters the refrigerant channel of the plate heat exchanger. The compressed working medium absorbs heat from the low-temperature water on the water side of the plate heat exchanger and then enters the intake pipe of the condenser. The working medium output by the condenser returns to the evaporator through the expansion valve. After the evaporator cools the air conditioner air, it forms gaseous working medium again and enters the intake port of the compressor. The water outlet of the heat storage barrel is sequentially connected to the water inlet of the washing barrel through the circulation pump and the first switching channel of the switching valve. The water outlet of the heat storage barrel is sequentially connected to the water inlet of the heat storage barrel through the circulation pump, the second switching channel of the switching valve, the fan coil unit, and the water side channel of the plate heat exchanger.

[0013] The beneficial effects of the present invention are as follows:

[0014] (1) Through the combined drying machine and air conditioner system, the waste heat of the air conditioner is fully recovered and utilized, achieving multiple functions with one device; saving energy and reducing costs. At the same time, using the heat pump system instead of electric heating to heat the cold water for washing clothes and dry the clothes greatly improves the utilization efficiency of electric energy.

[0015] (2) By adjusting the opening and closing states of the valves and the opening states of different channels of the switching valve, the air conditioner temperature control unit can be controlled to be in the refrigeration cycle state, the refrigeration heat storage cycle state, or the refrigeration drying cycle state, and the drying cycle unit can be controlled to be in the heat storage drying cycle state and the heat pump drying cycle state, realizing the combination of hot water washing, drying, and room cooling. And through the heat storage barrel, the waste heat of the air conditioner refrigeration working condition is recovered, thus improving the comprehensive performance of the household energy thermal management system while improving the energy utilization rate. Description of the Drawings

[0016] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0017] Figure 1 It is a module block diagram of a heat management system for the interlock of a dryer and an air conditioner proposed by the present invention;

[0018] Figure 2 It is a schematic structural diagram of a heat management system for the interlock of a dryer and an air conditioner proposed by the present invention;

[0019] Figure 3 It is a refrigerant flow diagram when the air conditioner temperature control unit of the present invention is in the refrigeration cycle state;

[0020] Figure 4 It is a refrigerant flow diagram when the air conditioner temperature control unit of the present invention is in the refrigeration and heat storage cycle state;

[0021] Figure 5 It is a refrigerant flow diagram when the drying cycle unit of the present invention is in the heat storage drying cycle state;

[0022] Figure 6 It is a refrigerant flow diagram when the drying cycle unit of the present invention is in the heat pump drying cycle state;

[0023] Figure 7 It is a refrigerant flow diagram when the whole machine system of the present invention is in the refrigeration and drying cycle state.

[0024] In the figure: 1 - compressor, 2 - condenser, 3 - expansion valve, 4 - evaporator, 5 - plate heat exchanger, 6 - fan coil unit, 7 - circulation pump, 8 - heat storage tank, 9 - washing tub, 101 - switching valve, 102 - first valve, 103 - second valve, 104 - third valve, 105 - fourth valve. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] Refer to Figure 1 and Figure 2, A heat management system for the interconnection of a clothes dryer and an air conditioner, comprising an air conditioner temperature control unit, a clothes drying circulation unit, and a flow path regulation unit. The air conditioner temperature control unit includes a compressor 1, a condenser 2, an expansion valve 3, and an evaporator 4. The clothes drying circulation unit includes a plate heat exchanger 5, a fan coil unit 6, a circulation pump 7, a heat storage barrel 8, and a washing tub 9. The flow path regulation unit includes a switching valve 101, a first valve 102, a second valve 103, a third valve 104, and a fourth valve 105. By adjusting the opening and closing states of the valves and the opening states of different flow paths of the switching valve, the heat management system is controlled to achieve various functions such as room cooling, hot water laundry, heat pump clothes drying, and cold water heat storage. The waste heat in the air conditioner refrigeration condition is recovered through the heat storage barrel, thereby improving the comprehensive performance of the household energy heat management system while increasing the energy utilization rate;

[0027] The gaseous outlet of the evaporator 4 is connected to the inlet of the compressor 1. The plate heat exchanger 5 is connected in parallel with the first valve 102 to form a first working selection branch of the plate heat exchanger. The condenser 2 is connected in parallel with the second valve 103 to form a condenser working selection branch. The exhaust port of the compressor 1 is sequentially connected to the liquid inlet of the evaporator 4 through the first working selection branch of the plate heat exchanger, the condenser working selection branch, and the expansion valve 3;

[0028] The plate heat exchanger 5 is connected in parallel with the third valve 104 to form a second working selection branch of the plate heat exchanger. One side of the second working selection branch of the plate heat exchanger is respectively connected to the water inlet of the heat storage barrel 8 and the fourth valve 105 with tap water connected externally. The other side of the plate heat exchanger 5 connected in parallel with the third valve 104 is connected to the water outlet of the fan coil unit 6. The water outlet of the heat storage barrel 8 is connected to the water inlet of the circulation pump 7. The water outlet of the circulation pump 7 is connected to the water inlet of the switching valve 101. The first switching flow path of the switching valve 101 is connected to the washing tub 9, and the second switching flow path of the switching valve 101 is connected to the water inlet of the fan coil unit 6.

[0029] Refer to Figure 3 , When the first valve 102 is in the open state, the second valve 103, the third valve 104, and the fourth valve 105 are in the closed state, and the first switching flow path of the switching valve 101 is in the closed state, the air conditioner temperature control unit is in the refrigeration cycle state. At this time, cold air is blown into the room through the heat management system to adjust the temperature and humidity of the air in the room to meet the requirements of human comfort. In the refrigeration cycle state of the air conditioner temperature control unit, the gaseous working medium in the evaporator 4 is compressed by the compressor 1 and then enters the intake pipe of the condenser 2. The gas-liquid mixture output by the condenser 2 returns to the evaporator 4 through the expansion valve 3. After the evaporator 4 cools the air conditioner air, it forms a gaseous working medium again and enters the intake port of the compressor 1.

[0030] Refer to Figure 4, when the second switching flow channel of the switching valve 101 is in the open state and the first valve 102, the second valve 103, the third valve 104, and the fourth valve 105 are in the closed state, the air-conditioning temperature control unit is in the refrigeration and heat storage cycle state. At this time, the thermal management system can not only provide cooling for the room, but also utilize the heat storage barrel to recover the waste heat discharged from the condenser of the air-conditioning system, saving energy. When the air-conditioning temperature control unit is in the refrigeration and heat storage cycle state, the gaseous working medium in the evaporator 4 is compressed by the compressor 1 and then enters the refrigerant flow channel of the plate heat exchanger 5. The compressed working medium absorbs heat from the low-temperature water on the water side of the plate heat exchanger 5 and then enters the intake pipe of the condenser 2. The working medium output by the condenser 2 flows back to the evaporator 4 through the expansion valve 3. After the evaporator 4 cools the air-conditioning air, it forms gaseous working medium again and enters the intake port of the compressor 1. At the same time, the water on the water side of the plate heat exchanger 5 absorbs heat and then enters the heat storage barrel 8. The water in the heat storage barrel 8 is pressurized by the circulation pump 7 and flows through the fan coil unit 6 and then enters the water side of the plate heat exchanger 5.

[0031] Refer to Figure 5 , when the third valve 104 is in the open state and the first valve 102, the second valve 103, and the fourth valve 105 are in the closed state, the dry cleaning cycle unit is in the heat storage and dry cleaning cycle state. When the dry cleaning cycle unit is in the heat storage and dry cleaning cycle state, at this time, the high-temperature hot water of the heat storage barrel is utilized to realize the functions of washing clothes with low-temperature hot water and drying clothes with hot air. There is no need for an additional heat source to heat the washing water and dry the clothes, greatly reducing energy consumption. The water outlet of the heat storage barrel 8 is sequentially connected to the water inlet of the washing barrel 9 through the circulation pump 7 and the first switching flow channel of the switching valve 101. The water outlet of the heat storage barrel 8 is sequentially connected to the water inlet of the heat storage barrel 8 through the circulation pump 7, the second switching flow channel of the switching valve 101, the fan coil unit 6, and the third valve 104.

[0032] Refer to Figure 6 , when the second valve 103 is in the open state and the first valve 102 and the third valve 104 are in the closed state, the dry cleaning cycle unit is in the heat pump dry cleaning cycle state. At this time, low-temperature hot water is produced by the heat pump system to wash and dry clothes. Compared with the electric heating system, the energy utilization efficiency is greatly improved. When the dry cleaning cycle unit is in the heat pump dry cleaning cycle state, the water outlet of the heat storage barrel 8 is sequentially connected to the water inlet of the washing barrel 9 through the circulation pump 7 and the first switching flow channel of the switching valve 101. The water outlet of the heat storage barrel 8 is sequentially connected to the water inlet of the heat storage barrel 8 through the circulation pump 7, the second switching flow channel of the switching valve 101, the fan coil unit 6, and the water side flow channel of the plate heat exchanger 5. The gaseous working medium in the evaporator 4 is compressed by the compressor 1 and then enters the refrigerant flow channel of the plate heat exchanger. The compressed working medium absorbs heat from the low-temperature water on the water side of the plate heat exchanger 5 and then enters the expansion valve 3 and flows back to the evaporator 4. After the evaporator 4 absorbs heat and warms up, it forms gaseous working medium again and enters the intake port of the compressor 1.

[0033] Reference Figure 7 When the first valve 102, the second valve 103 and the third valve 104 are in the closed state, the whole machine system is in the refrigeration and drying cycle state. In the refrigeration and drying cycle state of the whole machine system, the gaseous working medium in the evaporator 4 is compressed by the compressor 1 and then enters the refrigerant flow channel of the plate heat exchanger. The compressed working medium absorbs heat from the low-temperature water on the water side of the plate heat exchanger 5 and then enters the intake pipe of the condenser 2. The working medium output by the condenser 2 flows back to the evaporator 4 through the expansion valve 3. After the evaporator 4 cools the air conditioner air, it forms gaseous working medium again and enters the intake port of the compressor 1. The water outlet of the heat storage bucket 8 is connected to the water inlet of the washing tub 9 through the circulation pump 7 and the first switching flow channel of the switching valve 101 in sequence. The water outlet of the heat storage bucket 8 is connected to the water inlet of the heat storage bucket 8 through the circulation pump 7, the second switching flow channel of the switching valve 101, the fan coil unit 6 and the water side flow channel of the plate heat exchanger 5 in sequence.

[0034] In summary, by adjusting the opening and closing states of the valves and the opening states of different flow channels of the switching valve, the present invention can control the air-conditioning temperature control unit to be in the refrigeration cycle state, the refrigeration and heat storage cycle state or the refrigeration and drying cycle state, and control the drying cycle unit to be in the heat storage and drying cycle state and the heat pump drying cycle state, realizing the combination of hot water washing, drying and room cooling, and recovering the waste heat of the air-conditioning refrigeration working condition through the heat storage bucket, thereby improving the comprehensive performance of the household energy thermal management system while improving the energy utilization rate.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A heat management system for the interconnection of a dryer and an air conditioner, characterized in that: it includes an air conditioner temperature control unit, a drying cycle unit and a flow path regulation unit. The air conditioner temperature control unit includes a compressor (1), a condenser (2), an expansion valve (3) and an evaporator (4). The drying cycle unit includes a plate heat exchanger (5), a fan coil unit (6), a circulation pump (7), a heat storage barrel (8) and a washing barrel (9). The flow path regulation unit includes a switching valve (101), a first valve (102), a second valve (103), a third valve (104) and a fourth valve (105); the gaseous outlet of the evaporator (4) is connected to the intake port of the compressor (1). The plate heat exchanger (5) and the first valve (102) are connected in parallel to form a first working selection branch of the plate heat exchanger. The condenser (2) and the second valve (103) are connected in parallel to form a condenser working selection branch. The exhaust port of the compressor (1) is sequentially connected to the liquid inlet of the evaporator (4) through the first working selection branch of the plate heat exchanger, the condenser working selection branch and the expansion valve (3); the plate heat exchanger (5) and the third valve (104) are connected in parallel to form a second working selection branch of the plate heat exchanger. One side of the second working selection branch of the plate heat exchanger is respectively connected to the water inlet of the heat storage barrel (8) and the fourth valve (105) connected to tap water. The other side of the plate heat exchanger (5) and the third valve (104) connected in parallel to form the second working selection branch of the plate heat exchanger is connected to the water outlet of the fan coil unit (6). The water outlet of the heat storage barrel (8) is connected to the water inlet of the circulation pump (7). The water outlet of the circulation pump (7) is connected to the water inlet of the switching valve (101). The first switching flow path of the switching valve (101) is connected to the washing barrel (9). The second switching flow path of the switching valve (101) is connected to the water inlet of the fan coil unit (6).

2. The heat management system for the interconnection of a dryer and an air conditioner according to claim 1, characterized in that: when the first valve (102) is in the open state, the second valve (103), the third valve (104) and the fourth valve (105) are in the closed state, and the first switching flow path of the switching valve (101) is in the closed state, the air conditioner temperature control unit is in the refrigeration cycle state. In the refrigeration cycle state of the air conditioner temperature control unit, the gaseous working medium in the evaporator (4) is compressed by the compressor (1) and then enters the intake pipe of the condenser (2). The gas-liquid mixture output by the condenser (2) returns to the evaporator (4) through the expansion valve (3). After the evaporator (4) cools the air conditioner air, it forms gaseous working medium again and enters the intake port of the compressor (1).

3. The heat management system for the interconnection of a dryer and an air conditioner according to claim 1, characterized in that: When the second switching flow channel of the switching valve (101) is in an open state and the first valve (102), the second valve (103), the third valve (104) and the fourth valve (105) are in closed states, the air-conditioning temperature control unit is in a refrigeration and heat storage circulation state. In the refrigeration and heat storage circulation state of the air-conditioning temperature control unit, the gaseous working medium in the evaporator (4) is compressed by the compressor (1) and then enters the refrigerant flow channel of the plate heat exchanger (5). The compressed working medium enters the inlet pipe of the condenser (2) after absorbing heat from the low-temperature water on the water side of the plate heat exchanger (5). The working medium output by the condenser (2) flows back into the evaporator (4) through the expansion valve (3). After cooling the air-conditioning air, the evaporator (4) forms gaseous working medium again and enters the inlet of the compressor (1). At the same time, after absorbing heat on the water side, the plate heat exchanger (5) enters the heat storage barrel (8).

4. A heat management system for a clothes dryer and air conditioner linkage according to claim 3, characterized in that: In the refrigeration and heat storage circulation state of the air-conditioning temperature control unit, the water in the heat storage barrel (8) is pressurized by the circulation pump (7) and flows through the fan coil unit (6) into the water side of the plate heat exchanger (5).

5. A heat management system for a clothes dryer and air conditioner linkage according to claim 1, characterized in that: When the third valve (104) is in an open state and the first valve (102), the second valve (103) and the fourth valve (105) are in closed states, the clothes drying circulation unit is in a heat storage and clothes drying circulation state. In the heat storage and clothes drying circulation state of the clothes drying circulation unit, the water outlet of the heat storage barrel (8) is connected to the water inlet of the washing barrel (9) through the circulation pump (7) and the first switching flow channel of the switching valve (101) in sequence. The water outlet of the heat storage barrel (8) is connected to the water inlet of the heat storage barrel (8) through the circulation pump (7), the second switching flow channel of the switching valve (101), the fan coil unit (6) and the third valve (104) in sequence.

6. A heat management system for a clothes dryer and air conditioner linkage according to claim 1, characterized in that: When the second valve (103) is in the open state and the first valve (102) and the third valve (104) are in the closed state, the drying cycle unit is in the heat pump drying cycle state. In the heat pump drying cycle state of the drying cycle unit, the water outlet of the heat storage barrel (8) is sequentially connected to the water inlet of the washing barrel (9) through the circulation pump (7) and the first switching flow path of the switching valve (101). The water outlet of the heat storage barrel (8) is sequentially connected to the water inlet of the heat storage barrel (8) through the circulation pump (7), the second switching flow path of the switching valve (101), the fan coil unit (6), and the water side flow path of the plate heat exchanger (5). The gaseous working medium in the evaporator (4) is compressed by the compressor (1) and then enters the refrigerant flow path of the plate heat exchanger. The compressed working medium absorbs heat from the low-temperature water on the water side of the plate heat exchanger (5) and then enters the expansion valve (3) and then returns to the evaporator (4). After the evaporator (4) absorbs heat and warms up, it forms gaseous working medium again and enters the intake port of the compressor (1).

7. A heat management system for the interlock of a dryer and an air conditioner according to claim 1, characterized in that: When the first valve (102), the second valve (103), and the third valve (104) are in the closed state, the whole machine system is in the refrigeration drying cycle state. In the refrigeration drying cycle state of the whole machine system, the gaseous working medium in the evaporator (4) is compressed by the compressor (1) and then enters the refrigerant flow path of the plate heat exchanger. The compressed working medium absorbs heat from the low-temperature water on the water side of the plate heat exchanger (5) and then enters the intake pipe of the condenser (2). The working medium output by the condenser (2) returns to the evaporator (4) through the expansion valve (3). After the evaporator (4) cools the air conditioner air, it forms gaseous working medium again and enters the intake port of the compressor (1). The water outlet of the heat storage barrel (8) is sequentially connected to the water inlet of the washing barrel (9) through the circulation pump (7) and the first switching flow path of the switching valve (101). The water outlet of the heat storage barrel (8) is sequentially connected to the water inlet of the heat storage barrel (8) through the circulation pump (7), the second switching flow path of the switching valve (101), the fan coil unit (6), and the water side flow path of the plate heat exchanger (5).

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