CN217844147U - Radiant high-efficiency heat pump system with modularized phase change energy storage terminal - Google Patents

Abstract

A radiation type efficient heat pump system with a modularized phase change energy storage tail end belongs to the field of heating ventilation air conditioning application, and comprises an energy storage type solar air heat collection module and an indoor metal capillary network phase change energy storage refrigerant radiation tail end module, wherein the energy storage type solar air heat collection module is connected with one end of a fan, the other end of the fan is connected with an air conditioner heat exchanger, and the air conditioner heat exchanger is connected with the metal capillary network phase change energy storage radiation tail end module through a throttle valve; the compressor is connected with the metal capillary network phase change energy storage radiation tail end module through a four-way reversing valve; the air conditioner heat exchanger is connected with the compressor through a four-way reversing valve to form a closed-loop system. The invention fully utilizes solar energy in areas with higher solar radiation intensity in winter, effectively solves the problem of lower energy efficiency of heat pump unit in winter operation, ensures the stability of indoor air temperature during reverse circulation defrosting of the heat pump at the end of energy storage, and improves the thermal comfort of rooms.

Description

Radiant high-efficiency heat pump system with modularized phase change energy storage terminal

technical field

The utility model belongs to the application field of heating, ventilating and air-conditioning, and in particular relates to a radiation-type high-efficiency heat pump air-conditioning system with a modularized phase-change energy storage terminal.

Background technique

On the one hand, although the existing air conditioning system has undergone continuous improvement, there are still some obvious disadvantages: it is difficult to achieve independent temperature and humidity control, the feeling of blowing, high energy consumption, and the growth of bacteria in condensed water reduces the quality of fresh air, etc.; on the other hand, the traditional The current air source heat pump has a series of shortcomings such as low efficiency and serious frost in winter, which reduces the operating efficiency and effect of the system.

In order to overcome the drawbacks of the traditional air conditioning system, the capillary network radiation air conditioning system has come into people's field of vision. The end of the radiative capillary network is a new heating method, which has been widely discussed in recent years because of its large radiant heating area, low heating temperature, and no noise. The heat transfer medium of the capillary network radiant air conditioning system is mainly divided into two types: water media and environmentally friendly refrigerants. The Chinese standard "Code for Design of Heating, Ventilation and Air Conditioning in Civil Buildings" (GB 50736-2012) stipulates that the temperature of the water supply for capillary roof radiant heating should be 35°C or lower. Since the air-conditioning heat pump system using direct circulation of refrigerant for heat supply avoids the secondary heat exchange loss of the traditional water-medium form, greatly reduces energy consumption and lowers the cost, it is gradually favored by scholars. The environment-friendly refrigerant is used to replace the original water medium as the circulating conduction medium of cold and heat, and the indoor plastic-coated metal capillary network is used as the condenser to release heat for heating. This system uses the enclosure structure to form a large-area radiation heat exchanger, thereby reducing The heating temperature difference is reduced, so that low-temperature heating and a more comfortable and energy-saving lifestyle can be realized.

Air source heat pumps have the advantages of high efficiency, energy saving, convenient use, and wide application range. However, the problem of frosting and defrosting in low-temperature and high-humidity areas has become a bottleneck restricting its efficient operation. How to effectively delay the frosting of the air source heat pump, realize the defrosting of the outdoor heat exchanger efficiently and quickly, and reduce the adverse effects of the frosting and defrosting process on the heat pump unit and the indoor environment are related to whether the air source heat pump can be more extensive and A key question to run more efficiently.

Contents of the invention

The purpose of this utility model is to provide a new modular phase-change energy-storage terminal radiation-type high-efficiency heat pump system, the system includes energy-storage solar air heat collector and metal capillary network phase-change energy storage radiation terminal module: two parts Connected in turn through pipelines, in winter, solar energy is used to send the air heated by the energy storage solar air heat collector to the air inlet of the air conditioner heat exchanger through the deflector hood, providing a higher temperature air heat source for the heat pump system, and realizing the heat pump system in severe cold At the same time, the phase-change energy storage components at the indoor end can not only store the heat generated by the high-efficiency operation of the heat pump during the day and use it at night, but also ensure the stability of the indoor air temperature during the reverse cycle defrosting of the heat pump. The use of phase change energy storage components solves to a certain extent the mismatching problems of the heat pump system in terms of usage time, region, and operating efficiency. When heating in winter, a new modular phase-change energy storage end-radiation high-efficiency heat pump system is adopted, which effectively solves the problems of low heating efficiency and serious frosting of air source heat pumps, and provides a more comfortable heating system for urban residences in northern China in winter. , lower energy consumption, and a new way of being more environmentally friendly.

The present invention adopts following technical scheme:

A radiation-type high-efficiency heat pump system at the end of a modular phase-change energy storage, the system includes an energy-storage solar air heat collection module and an indoor metal capillary network phase-change energy-storage refrigerant radiation end module, specifically including a compressor (1) , four-way reversing valve (2), metal capillary network phase change energy storage radiation end module (3), throttle valve (4), air conditioner heat exchanger (5), fan (6), energy storage solar air collector Heater (7), wherein the energy storage type solar air heat collector (7) is connected to one end of the fan (6), and the other end of the fan (6) is connected to the air conditioner heat exchanger (5), and the air conditioner heat exchanger (5) The throttle valve (4) is connected to the metal capillary network phase change energy storage radiation terminal module (3); the compressor (1) is connected to the metal capillary network phase change energy storage radiation terminal module (3) through the four-way reversing valve (2) ); the air conditioner heat exchanger (5) is connected to the compressor (1) through a four-way reversing valve (2) to form a closed-loop system.

The metal capillary network phase change energy storage radiation end module includes a metal capillary network (10), a phase change energy storage component (9), filling mortar (11), and a ground heat insulation layer (12), and the ground heat insulation layer ( 12), the metal capillary network (10) is laid on the ground heat insulation layer (12), and the phase change energy storage component (9) is evenly laid on the metal capillary network (10) by embedding or tiled, and filled with mortar (11 ) filling, the uppermost layer is leveled by the plastering layer and the ground decoration layer (8) is laid.

The metal capillary network (10) is connected to the air conditioner heat exchanger (5), and the flowing medium in the tube is an environmentally friendly refrigerant.

The energy storage type solar air heat collector (7) contains a phase change energy storage core, the lower end of the heat collecting tube is provided with a microchannel air inlet, and the upper header is also provided with an air outlet.

The energy storage type solar air heat collector (7) is provided with a micro-channel air inlet, the energy storage type solar air heat collector (7) is provided with an upper header, and the upper header is provided with an air outlet, and the air outlet is connected to the fan ( 6) Connection, the fan (6) is connected to the air inlet of the air conditioner heat exchanger (5), and the air inlet is provided with a deflector.

The compressor (1) is connected to the four-way reversing valve (2), and the four-way reversing valve (2) is respectively connected to the indoor metal capillary network phase-change energy storage refrigerant radiation end module (3) and the air conditioner heat exchanger (5) connected.

The metal capillary network (10) is made of plastic-coated copper metal capillary.

The phase change energy storage component (9) is encapsulated by PVC hot melt, and the phase change temperature range is 28-32°C.

The invention proposes a new heating and air-conditioning system design scheme that combines solar energy, air source heat pump, capillary network radiation, and phase change materials. The energy-type solar air collector preheats the imported air, increases the evaporation temperature of the air source heat pump, and effectively improves the efficient operation time of the air source heat pump unit. When the outdoor air condition is bad, the heat stored in the phase change material in the metal capillary network phase change energy storage radiation terminal module is used for reverse cycle defrosting, which ensures the stability of the room temperature.

Beneficial effects of the present invention:

(1) The design concept of a radiation-type high-efficiency heat pump system based on the modular phase-change energy storage terminal of the present invention, the flowing medium in the tube is an environmentally friendly refrigerant, and the metal capillary network is directly laid on the floor of the room for heat exchange. Compared with water The medium heat pump system reduces the secondary heat exchange loss, and the heating condensation temperature is improved from 50°C of the traditional heat pump system to about 30°C, which improves the operating efficiency of the heat pump system from the operating parameters.

(2) The heat transfer medium of the energy storage type solar air heat collection module is air, which has a high safety factor; the air heated by the heat collector is sent to the air outlet of the air conditioner heat exchanger, which effectively improves the energy efficiency ratio of the air source heat pump in winter.

(3) Due to the good heat storage characteristics of the indoor phase change energy storage radiation terminal module, even if the heat supply is stopped, the phase change materials inside the ground and walls store sufficient heat, which will be continuously released to maintain indoor thermal comfort Therefore, the system can choose to heat and store energy during the day when the temperature is high in winter, so that the cycle efficiency of the system can be further improved; when the reverse cycle defrosting of the heat pump is performed in bad weather outdoors, the indoor air temperature is guaranteed to be stable and the room temperature is improved. thermal comfort.

(4) When operating in summer conditions, the air heated by the energy-storage solar air collector can be used in conjunction with the rotary dehumidifier, and the heat of the air heated by the energy-storage solar collector in summer can be used to recover the heat pump subsystem The waste heat discharged from the condenser is used to heat the dehumidified and regenerated air of the rotor, which improves the exergy utilization rate of energy. At the same time, the condensation temperature of the heat pump subsystem can be effectively reduced, which greatly improves the efficiency of the refrigeration cycle.

(5) Radiant heating is adopted at the end of the room, and the temperature distribution is uniform, which meets the physiological needs of the human body for "hot feet and cold head". Not only is it hygienic and noiseless, but it can also give people the same thermal comfort compared to the indoor temperature with a temperature difference of 2°C compared with the convection method, effectively reducing the heating energy consumption of buildings.

(6) The heat transfer efficiency of phase change is much better than that of traditional water medium temperature difference heat transfer, and the risk of pipeline freezing and cracking is completely avoided.

(7) The indoor radiant end module is simple, modular combination, prefabricated groove thin floor heating and air conditioning system, suitable for different construction fields: town houses, apartments, villas, hospitals, etc.

(8) The modular metal capillary network phase change energy storage radiation end module of this design can be combined with prefabricated concrete building components, and the building is suitable for factory production of components, which can integrate design, production, construction and installation.

(9) Large-scale production of components, on-site assembly and combination according to drawings, simple on-site construction operation, less environmental pollution during construction, recyclable utilization, high economic and environmental protection.

(10) The integrated manufacturing process of modularized phase change energy storage radiation terminal structure with integrated molding performance and perfect performance ensures project quality, improves production efficiency, and reduces material loss and construction procedures.

(11) The radiant-type high-efficiency heat pump air-conditioning system based on the modular phase-change energy storage terminal uses solar energy, a clean and renewable energy, as the main energy source of the system, providing a more comfortable and energy-efficient urban residence in northern China. Low-cost, more environmentally friendly new way. At the same time, the radiant high-efficiency air source heat pump system based on phase change energy storage has the characteristics of intermittent operation, which not only reduces the economic cost of system operation to a certain extent, but also ensures that the indoor air can The temperature is stabilized, improving the thermal comfort of the room.

Description of drawings

Fig. 1 is a schematic structure diagram of the utility model system;

Fig. 2 is a cross-sectional view of the laying of the metal capillary network phase change energy storage radiation end of the utility model.

Fig. 3 is a schematic diagram of the reverse cycle defrosting operation of the winter system of the utility model.

Fig. 4 is a flowchart of the first mode of the utility model.

Fig. 5 is a flow chart of the second mode of the utility model.

Fig. 6 is a flow chart of the third mode of the utility model.

In the figure, 1—compressor; 2—four-way reversing valve; 3—metal capillary network phase change energy storage radiation terminal module; 4—throttle valve; 5—outdoor heat exchanger; 6—fan; 7—energy storage 8—ground decoration layer; 9—phase change energy storage component; 10—metal capillary network; 11—filling mortar; 12—ground heat insulation layer.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

A radiant high-efficiency heat pump system at the end of a modular phase-change energy storage, the system includes an energy-storage solar air heat collection module and an indoor metal capillary network phase-change energy storage refrigerant radiation end module, specifically including compressors 1, 4 Reversing valve 2, metal capillary network phase change energy storage radiation terminal module 3, throttle valve 4, air conditioner heat exchanger 5, fan 6, energy storage type solar air heat collector 7, wherein the energy storage type solar air The heat collector 7 is connected to one end of the fan 6, and the other end of the fan 6 is connected to the air conditioner heat exchanger 5, and the air conditioner heat exchanger 5 is connected to the metal capillary network phase change energy storage radiation terminal module 3 through the throttle valve 4; the compressor 1 passes through four The through reversing valve 2 is connected with the metal capillary network phase change energy storage radiation terminal module 3; the air conditioner heat exchanger 5 is connected with the compressor 1 through the four-way reversing valve 2 to form a closed-loop system. The metal capillary network phase change energy storage radiation terminal module includes a metal capillary network 10, a phase change energy storage component 9, a filling mortar 11, and a ground heat insulation layer 12. The ground heat insulation layer 12 is set on the bottom layer, and the ground heat insulation layer 12 is laid The metal capillary network (10), the phase change energy storage component 9 is evenly laid on the metal capillary network 10 by embedded or tiled, filled with filling mortar 11, and the uppermost layer is leveled by the plastering layer, and the ground decoration layer 8 is laid.

The metal capillary network 10 is connected to the heat exchanger 5 of the air conditioner, and the flowing medium in the tube is an environmentally friendly refrigerant.

In the system, the compressor 1 is used to increase the temperature and pressure of the refrigerant, and the low-temperature and low-pressure refrigerant vapor is compressed into a high-temperature and high-pressure superheated steam, which is cooled and condensed at the radiation end and transformed into a normal-temperature and high-pressure liquid refrigerant, and at the same time, a large amount of heat is released for heating ;Through the throttling valve 4 adiabatic throttling, the refrigerant is converted into a low-temperature and low-pressure liquid refrigerant; finally, the low-temperature and low-pressure liquid refrigerant in the evaporation section of the outdoor heat exchanger 5 evaporates into superheated steam after absorbing heat, and flows back to the compressor 1. Such as a reciprocating cycle to realize the continuous operation of the system.

as shown in picture 2. In the system, the indoor metal capillary network phase-change energy storage refrigerant radiation end module device mainly includes metal capillary network, phase-change energy storage components, filling mortar 11, and ground heat insulation layer 12. The installation position of phase-change energy storage components 9 can be embedded Lay evenly on the metal capillary network 10 in a flat or tiled manner, and finally lay the ground decoration layer 8 after leveling through the plastering layer.

The energy storage type solar air heat collector 7 in the system contains a phase change energy storage core, the lower end of the heat collecting tube is provided with a micro channel air inlet, and the upper header is also provided with an air outlet. The energy-storage solar air heat collector 7 is connected to the air inlet of the air conditioner heat exchanger 5 through the fan 6, and the air inlet is provided with a deflector. Its purpose is to evenly and efficiently send the higher temperature air heated by solar energy in the energy storage type solar air heat collector to the air inlet of the air conditioner heat exchanger.

The high-efficiency heat pump system at the end of a modularized phase-change energy storage has the characteristics of intermittent operation, and the energy-storage solar air heat collector 7 absorbs solar radiation heat, which effectively prolongs the high-efficiency operation time of the air-source heat pump unit in winter; The heated air is sent to the air supply port of the air conditioner heat exchanger 5, which improves the energy efficiency ratio of the air source heat pump unit in winter. At the same time, when the heat pump is reverse-cycle defrosted in bad weather conditions, the end of the modular phase-change energy storage component effectively ensures the stability of the indoor air temperature and improves the thermal comfort of the room.

The energy-storage solar air heat collector 7 in the system can be used in combination with a rotary dehumidifier for dehumidification and cooling mode in summer. The indoor capillary network refrigerant bears the cooling load of the room, and the rotary dehumidifier bears the ability to handle the humidity load, realizing the concept of independent control of the temperature and humidity of the system, improving the comfort of the room, and the system operates with high efficiency and energy saving.

The energy storage type solar heat collector uses the heat of the heated air and the waste heat recovered from the condenser of the heat pump subsystem to heat the dehumidified and regenerated air of the runner, which improves the exergy utilization rate of energy, and at the same time the condensation of the heat pump subsystem The temperature can be effectively reduced and the efficiency of the refrigeration cycle can be greatly improved.

The metal capillary network phase-change energy storage radiation terminal module can be produced in a large scale, assembled and installed on site, has simple construction and operation, and saves construction costs. Prefabricated grooved thin floor heating and air conditioning system, suitable for different construction fields: town houses, apartments, villas, hospitals, etc.

The modularized metal capillary network phase-change energy storage radiation terminal module can be combined with prefabricated concrete building components, and the building is suitable for factory production of components, and design, production, construction and installation can be integrated.

The integrated manufacturing process with perfect integral molding performance of the modularized phase-change energy-storage radiation end structure ensures project quality, improves production efficiency, and reduces material loss and construction procedures. The application of a high-efficiency heat pump system at the end of a modular phase-change energy storage has three cycle modes:

Mode 1 (solar heat collection and high-efficiency heating cycle): In winter working conditions, the fan 6 is used to provide power for air circulation, and the outdoor air passes through the energy-storage solar air heat collector 7 to store solar heat during the day, which is used to improve the external evaporation in winter The temperature of the heat exchanger (outdoor heat exchanger 5) is removed from the outside after the heat is taken, and then the heat collection cycle is performed to improve the operating efficiency of the air source heat pump unit. The specific process is as follows: compressor 1 compresses low-temperature and low-pressure dry saturated refrigeration steam into high-temperature and high-pressure superheated steam; cools and condenses in the metal capillary network phase change energy storage radiation end 3 to release a large amount of heat; After the pressure enters the outdoor heat exchanger 5 to absorb heat and evaporate, it returns to the compressor 1, and this reciprocating cycle realizes the efficient heating cycle of the air source heat pump.

The energy storage type solar air heat collection module includes an energy storage type solar air heat collector, a fan, a deflector hood, and a connecting air duct; the energy storage type solar air heat collector passes the heated air through the fan, and passes through The air guide cover is evenly sent to the air inlet of the air conditioner heat exchanger, and the air after heat exchange by the air conditioner heat exchanger is discharged from the air outlet.

The phase-change energy storage type solar heat collector is further provided with a micro-channel air inlet, and the upper header is further provided with an air outlet, and a fan is used to provide power for air circulation.

Mode 2 (winter defrosting cycle): In winter, when the outdoor conditions are bad at night, the evaporating side (outdoor heat exchanger 5) of the air source heat pump is prone to frost, which affects the heating efficiency of the unit. At this time, use the heat absorbed by the energy storage type solar air heat collector 7 during the day in winter, and under the action of the fan 6, the outdoor air with increased temperature will be sent to the fins of the outdoor heat exchanger 3 to increase the temperature of the evaporation side of the heat pump unit. , effectively alleviate the problem of air source heat pump. In addition, when the outdoor evaporator has been seriously frosted, the effective reverse cycle defrosting for the heat pump is performed by switching the four-way reversing valve 2 . Energy-storage radiant terminal module through absorbing metal capillary network phase change

3. Phase change energy storage components The heat stored by the heat pump during the daytime is efficiently operated, and the heat is sent to the outdoor side frosting heat exchanger, which can effectively ensure the stability of the indoor air temperature and the thermal comfort of the room while efficiently defrosting.

The compressor 1 is connected to the four-way reversing valve 2, and the four-way reversing valve 2 is respectively connected to the metal capillary network phase change energy storage radiation terminal module 3 and the outdoor heat exchanger 5, and the outdoor heat exchanger 5 passes through the signal system The flow direction of the refrigerant in the four-way reversing valve 2 can be automatically changed, so as to realize the timed reverse cycle defrosting of the heat pump system in winter.

Among them, the conversion of the summer working condition of the system is realized through the four-way reversing valve 2.

Mode 3 (combined runner dehumidification circulation system): In summer working conditions, the energy storage solar air collector 7 combined with the runner dehumidification system realizes the design concept of independent control of temperature and humidity. The indoor capillary network refrigerant bears the cooling load of the room, and the rotary dehumidifier bears the ability to handle the humidity load, which improves the comfort of the room, and the system operates with high efficiency and energy saving.

The system heats the air through the energy storage solar collector in summer and recovers the waste heat discharged from the condenser of the heat pump subsystem for heating the dehumidified and regenerated air of the runner, which improves the exergy utilization rate of energy, and at the same time the condensation temperature of the heat pump subsystem It can be effectively reduced and the efficiency of the refrigeration cycle can be greatly improved.

The above-mentioned new type of radiant high-efficiency heat pump air-conditioning system based on modularized phase change energy storage terminal effectively utilizes solar energy, a clean and renewable energy source, as the main energy source of the system, providing a more comfortable, New ways to use less energy and be more environmentally friendly. At the same time, the radiant high-efficiency air source heat pump system based on phase change energy storage has the characteristics of intermittent operation, which not only reduces the economic cost of system operation to a certain extent, but also ensures that the indoor air can The temperature is stabilized, improving the thermal comfort of the room.

The metal capillary network phase-change energy storage radiation terminal module can be produced in a large scale, assembled and installed on site, has simple construction and operation, and saves construction costs. Prefabricated grooved thin floor heating and air conditioning system, suitable for different construction fields: town houses, apartments, villas, hospitals, etc.

In the high-efficiency heat pump system at the end of a modular phase-change energy storage described above, the metal capillary network laid indoors is connected to the air-conditioning heat exchanger, and the flowing medium in the capillary is an environmentally friendly refrigerant.

The above disclosure is only a specific example of the present invention, however, the embodiment of the present invention is not limited thereto, and any changes that can be considered by those skilled in the art should fall within the protection scope of the present invention.

Claims (8)

1. The utility model provides a terminal radiant type high-efficient heat pump system of modularization phase transition energy storage which characterized in that: the system comprises an energy storage type solar air heat collection module and an indoor metal capillary network phase change energy storage refrigerant radiation end module, and specifically comprises a compressor (1), a four-way reversing valve (2), a metal capillary network phase change energy storage radiation end module (3), a throttle valve (4), an air conditioner heat exchanger (5), a fan (6) and an energy storage type solar air heat collector (7), wherein the energy storage type solar air heat collector (7) is connected with one end of the fan (6), the other end of the fan (6) is connected with the air conditioner heat exchanger (5), and the air conditioner heat exchanger (5) is connected with the metal capillary network phase change energy storage radiation end module (3) through the throttle valve (4); the compressor (1) is connected with the metal capillary network phase change energy storage radiation tail end module (3) through a four-way reversing valve (2); the air conditioner heat exchanger (5) is connected with the compressor (1) through the four-way reversing valve (2) to form a closed-loop system.

2. The modular phase change energy storage terminal radiant high efficiency heat pump system of claim 1, wherein: the metal capillary network phase change energy storage radiation terminal module comprises a metal capillary network (10), a phase change energy storage component (9), filling mortar (11) and a ground heat insulation layer (12), wherein the bottom layer is provided with the ground heat insulation layer (12), the metal capillary network (10) is laid on the ground heat insulation layer (12), the phase change energy storage component (9) is uniformly laid on the metal capillary network (10) in an embedded or flat mode and is filled with the filling mortar (11), and the ground decoration layer (8) is laid on the uppermost layer after the uppermost layer is leveled through a plastering layer.

3. The modular phase change energy storage terminal radiant high efficiency heat pump system of claim 2, wherein: the metal capillary network (10) is connected with the air-conditioning heat exchanger (5), and the flowing medium in the metal capillary network is an environment-friendly refrigerant.

4. The modular phase change energy storage terminal radiant high efficiency heat pump system of claim 1, wherein:

the energy storage type solar air heat collector (7) comprises a phase change energy storage core, the lower end of the heat collecting tube is provided with a micro-channel air inlet, and the upper header is additionally provided with an air outlet.

5. The modular phase change energy storage terminal radiant high efficiency heat pump system of claim 1, wherein: the air conditioner is characterized in that a micro-channel air inlet is formed in the lower portion of the energy storage type solar air heat collector (7), an upper header is arranged above the energy storage type solar air heat collector (7), an air outlet is formed in the upper header, the air outlet is connected with a fan (6), the fan (6) is connected with an air inlet of the air-conditioning heat exchanger (5), and a diversion fan cover is arranged at the air inlet.

6. The modular phase change energy storage terminal radiant high efficiency heat pump system of claim 1, wherein: the compressor (1) is connected with the four-way reversing valve (2), and the four-way reversing valve (2) is respectively connected with the indoor metal capillary network phase change energy storage refrigerant radiation tail end module (3) and the air conditioner heat exchanger (5).

7. The modular phase change energy storage terminal radiant high efficiency heat pump system of claim 2 or 3, wherein: the metal capillary network (10) is a plastic-coated copper metal capillary.

8. The modular phase change energy storage terminal radiant high efficiency heat pump system of claim 2, wherein: the phase change energy storage component (9) is packaged by PVC hot melting, and the phase change temperature range is 28-32 ℃.

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