Air energy equipment self-defrosting device

Abstract

The application belongs to the technical field of defrosting, and discloses a self-defrosting device for air energy equipment, which comprises a self-defrosting closed space with louvers for mounting the air energy equipment, a PLC control system, a louver driver for controlling the rotating angle of the louver blades, a first temperature sensor and a second temperature sensor; wherein the self-defrosting closed space is closed and ventilated through the louvers. The application is used for defrosting the air energy equipment, and circulates the heat contained in air energy, solar energy, geothermal energy and sewage energy to defrost the air energy equipment, so that the heat energy is efficiently utilized.

Description

Technical Field

[0001] This invention belongs to the field of defrosting technology and relates to defrosting of air source heat pump equipment. Specifically, it is a self-defrosting device for air source heat pump equipment. Background Technology

[0002] When using air source heat pumps for heating in winter, because these devices are placed outdoors, they are prone to frost formation when the outdoor temperature is low and the air contains a certain amount of humidity. This reduces their heat exchange capacity, severely impacting their performance and significantly decreasing their heating efficiency. Therefore, to ensure that air source heat pumps continue to provide good heating, they must be defrosted regularly.

[0003] Currently, air source heat pumps mainly employ two defrosting methods: one utilizes a four-way valve for reversing, but this method is not conducive to energy conservation and environmental protection, and it also affects hot water production during defrosting, thus impacting normal operation; the other utilizes cold water bypass for defrosting, but this method has a relatively complex structure and is cumbersome to control, significantly increasing costs. Therefore, there is a need to provide a defrosting device for air source heat pumps that employs a new defrosting method. Summary of the Invention

[0004] The purpose of this invention is to provide an air source heat pump self-defrosting device that utilizes the heat contained in air energy, solar energy, geothermal energy and sewage energy to defrost the air source heat pump, thereby achieving efficient utilization of thermal energy.

[0005] To achieve the above objectives, the technical solution adopted by this invention is as follows:

[0006] An air source heat pump self-defrosting device includes a self-defrosting enclosed space with louvers for installing the air source heat pump, and further includes a PLC control system, a louver driver for controlling the rotation angle of the louver blades, a first temperature sensor, and a second temperature sensor; wherein:

[0007] The self-defrosting enclosed space is sealed and ventilated through louvers;

[0008] The first temperature sensor and the second temperature sensor are respectively located at the water inlet and water outlet of the air source heat pump; a heat exchanger is provided in front of the air source heat pump, and a fan is provided in front of the heat exchanger to blow the heat from the heat exchanger toward the air source heat pump.

[0009] The inlet of the heat exchanger is connected to the outlet of the energy storage coupled heat pump system through a defrost inlet pipe, and the outlet of the heat exchanger is connected to the inlet of the energy storage coupled heat pump system through a defrost outlet pipe; a first control valve is provided on the defrost inlet pipe, and a second control valve is provided on the defrost outlet pipe.

[0010] The output terminals of the first temperature sensor and the second temperature sensor are respectively connected to the input terminal of the PLC control system. The output terminal of the PLC control system is also connected to the input terminal of the first control valve, the input terminal of the second control valve, the input terminal of the louver actuator, the input terminal of the heat exchanger, and the input terminal of the fan. The PLC control system has a preset temperature difference threshold between the first temperature sensor and the second temperature sensor.

[0011] As a limitation, the energy storage coupled heat pump system includes air source heat pump equipment, solar energy collection system, geothermal energy collection system, wastewater energy collection system, energy storage system, and absorption heat pump unit system;

[0012] The outlet of the heat exchanger is connected to the inlet of the air source heat pump, the inlet of the solar energy collection system, the inlet of the geothermal energy collection system, and the inlet of the wastewater energy collection system via a defrost outlet pipe. The outlets of the air source heat pump, the solar energy collection system, the geothermal energy collection system, and the wastewater energy collection system are all connected to the hot end inlet of the energy storage system via high-temperature inlet pipes. The hot end outlet of the energy storage system is connected to the hot end inlet of the absorption heat pump unit system via a high-temperature outlet pipe. The hot end outlet of the absorption heat pump unit system is connected to the defrost inlet pipe and the user inlet pipe of the heat user equipment via a first hot water outlet pipe.

[0013] The high-temperature water inlet pipe is sequentially equipped with a third control valve, a first water pump, and a fourth control valve; the high-temperature water outlet pipe is sequentially equipped with a fifth control valve, a second water pump, and a sixth control valve; and the first hot water outlet pipe is sequentially equipped with a seventh control valve, a third water pump, and an eighth control valve.

[0014] The cold end inlet of the absorption heat pump unit system is connected to the user outlet pipe of the heat user equipment through the heat pump return pipe; the cold end outlet of the absorption heat pump unit system is connected to the cold end inlet of the energy storage system through the low temperature outlet pipe; the cold end outlet of the energy storage system is connected to the inlet of the air source heat pump equipment, the inlet of the solar energy collection system, the inlet of the geothermal energy collection system, and the inlet of the wastewater energy collection system through the first cold water outlet pipe.

[0015] The heat pump return pipe is equipped with a ninth control valve, the low-temperature water outlet pipe is equipped with a tenth control valve, and the first cold water outlet pipe is equipped with an eleventh control valve; the input terminals of the third to eleventh control valves and the first to third water pumps are respectively connected to the output terminal of the PLC control system.

[0016] As a further limitation, it also includes a second hot water outlet pipe, and the outlet of the air source heat pump, the outlet of the solar energy collection system, the outlet of the geothermal energy collection system and the outlet of the sewage energy collection system are all connected to the same end of the second hot water outlet pipe, and the second hot water outlet pipe is equipped with a twelfth control valve at that end.

[0017] The other end of the second hot water outlet pipe is connected to the first hot water outlet pipe located between the seventh control valve and the third water pump, and the second hot water outlet pipe is equipped with a thirteenth control valve at this end.

[0018] The input terminals of the twelfth and thirteenth control valves are respectively connected to the output terminals of the PLC control system for communication.

[0019] As another limitation, it also includes a second cold water outlet pipe, wherein the heat pump return water pipe and the user outlet pipe of the heat user equipment are both connected to one end of the second cold water outlet pipe, and the other end of the second cold water outlet pipe is connected to the water inlet of the air source equipment, the water inlet of the solar energy collection system, the water inlet of the geothermal energy collection system and the water inlet of the sewage energy collection system.

[0020] The fourteenth control valve is installed on the second cold water outlet pipe; the input of the fourteenth control valve is communicatively connected to the output of the PLC control system.

[0021] As a further limitation, the high-temperature water inlet pipe is connected to the first cold water outlet pipe via a pipeline, and a fifteenth control valve is provided on the pipeline; the input end of the fifteenth control valve is communicatively connected to the output end of the PLC control system.

[0022] As a further limitation, the user inlet pipe and user outlet pipe of the heat user equipment are connected by a pipeline, and a sixteenth control valve is provided on the pipeline. The input end of the sixteenth control valve is communicatively connected to the output end of the PLC control system.

[0023] As a third limitation, a sewage pipe is installed on the ground of the self-defrosting enclosed space, and a seventeenth control valve is installed on the sewage pipe. The input end of the seventeenth control valve is communicatively connected to the output end of the PLC control system.

[0024] The present invention, by adopting the above-described technical solution, achieves the following technical advancements compared to existing technologies:

[0025] (1) This invention utilizes the heat contained in air energy, solar energy, geothermal energy and sewage energy to defrost air energy equipment, thus realizing the efficient utilization of thermal energy;

[0026] (2) The present invention installs the air source heat pump in a closed, self-defrosting enclosed space with louvers, which prevents the air source heat pump from being directly exposed to the space outside the wall, thus avoiding the problem of poor waterproof and heat insulation capabilities.

[0027] (3) Compared with traditional technology, the present invention has the advantages of short defrosting time and continuous heating;

[0028] (4) In this invention, the energy storage coupled heat pump system can select different pipelines for circulation according to different temperatures, thus ensuring the maximum utilization of thermal energy.

[0029] This invention is used in conjunction with air source heat pumps to enable self-defrosting of the air source heat pumps. Attached Figure Description

[0030] Figure 1 The diagram shown is a structural schematic of the self-defrosting enclosed space in Embodiment 1 of the present invention;

[0031] Figure 2 The figure shown is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0032] Figure 3 The figure shown is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0033] In the diagram: 1. Self-defrosting enclosed space; 2. Louvers; 3. Air source heat pump; 4. First temperature sensor; 5. Second temperature sensor; 6. Heat exchanger; 7. Fan; 8. Defrosting inlet pipe; 9. Defrosting outlet pipe; 10. First control valve; 11. Second control valve; 12. Solar energy collection system; 13. Geothermal energy collection system; 14. Wastewater energy collection system; 15. Energy storage system; 16. Absorption heat pump unit system; 17. High-temperature inlet pipe; 18. High-temperature outlet pipe; 19. First hot water outlet pipe; 20. Heat user equipment; 21. User inlet pipe; 22. Third control valve; 23. First water pump; 24. ... 25. Fifth control valve; 26. Second water pump; 27. Sixth control valve; 28. Seventh control valve; 29. ​​Third water pump; 30. Eighth control valve; 31. Heat pump return pipe; 32. Low temperature water outlet pipe; 33. First cold water outlet pipe; 34. Ninth control valve; 35. Tenth control valve; 36. Eleventh control valve; 37. Second hot water outlet pipe; 38. Twelfth control valve; 39. Thirteenth control valve; 40. Second cold water outlet pipe; 41. Fourteenth control valve; 42. Fifteenth control valve; 43. Sixteenth control valve; 44. User water outlet pipe; 45. Sewage pipe; 46. Seventeenth control valve. Detailed Implementation

[0034] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] like Figure 1 As shown, this embodiment is an air source heat pump self-defrosting device, including an internal self-defrosting enclosed space 1 for installing the air source heat pump 3. It is a closed cabin-like structure with louvers 2 on its side walls. The self-defrosting enclosed space 1 is sealed and ventilated through the louvers 2.

[0037] This embodiment also includes a PLC control system, a louver driver for controlling the rotation angle of the louver blades 2, a first temperature sensor 4, and a second temperature sensor 5.

[0038] like Figure 2 As shown, the first temperature sensor 4 is located at the water inlet of the air source heat pump 3, and the second temperature sensor 5 is located at the water outlet of the air source heat pump 3. Inside the self-defrosting enclosed space 1, a heat exchanger 6 is located in front of the air source heat pump 3 (the front refers to the side of the air source heat pump 3 with the heat exchanger fins installed), and a fan 7 is located in front of the heat exchanger 6 (the front refers to the direction opposite to the side of the air source heat pump 3 with the heat exchanger fins installed) to blow the heat from the heat exchanger 6 onto the air source heat pump 3. In this embodiment, the heat exchanger 6 can be a finned tube heat exchanger.

[0039] The inlet of heat exchanger 6 is connected to the outlet of the energy storage coupled heat pump system through defrost inlet pipe 8, and the outlet of heat exchanger 6 is connected to the inlet of the energy storage coupled heat pump system through defrost outlet pipe 9; a first control valve 10 is provided on defrost inlet pipe 8, and a second control valve 11 is provided on defrost outlet pipe 9.

[0040] The energy storage coupled heat pump system includes an air source heat pump unit 3, a solar energy collection system 12, a geothermal energy collection system 13, a wastewater energy collection system 14, an energy storage system 15, and an absorption heat pump unit system 16. The air source heat pump unit 3, the solar energy collection system 12, the geothermal energy collection system 13, and the wastewater energy collection system 14 all utilize existing equipment capable of exchanging heat from air, solar, geothermal, and wastewater sources. For example, the air source heat pump unit 3 uses an air source heat pump water heater, and the energy storage system 15 uses an energy storage tank.

[0041] The outlet of heat exchanger 6 is connected to the inlet of air source heat pump 3, the inlet of solar energy collection system 12, the inlet of geothermal energy collection system 13, and the inlet of wastewater energy collection system 14 via defrost outlet pipe 9. The outlets of air source heat pump 3, solar energy collection system 12, geothermal energy collection system 13, and wastewater energy collection system 14 are all connected to the hot end inlet of energy storage system 15 via high temperature inlet pipe 17. The hot end outlet of energy storage system 15 is connected to the hot end inlet of absorption heat pump unit system 16 via high temperature outlet pipe 18. The hot end outlet of absorption heat pump unit system 16 is connected to defrost inlet pipe 8 and user inlet pipe 21 of heat user equipment 20 via first hot water outlet pipe 19. Among them, the high-temperature water inlet pipe 17 is equipped with a third control valve 22, a first water pump 23, and a fourth control valve 24 in sequence; the high-temperature water outlet pipe 18 is equipped with a fifth control valve 25, a second water pump 26, and a sixth control valve 27 in sequence; and the first hot water outlet pipe 19 is equipped with a seventh control valve 28, a third water pump 29, and an eighth control valve 30 in sequence.

[0042] The cold end inlet of the absorption heat pump unit system 16 is connected to the user outlet pipe 44 of the heat user equipment 20 through the heat pump return water pipe 31. The cold end outlet of the absorption heat pump unit system 16 is connected to the cold end inlet of the energy storage system 15 through the low temperature outlet pipe 32. The cold end outlet of the energy storage system 15 is connected to the inlet of the air source heat pump equipment 3, the inlet of the solar energy collection system 12, the inlet of the geothermal energy collection system 13, and the inlet of the wastewater energy collection system 14 through the first cold water outlet pipe 33. Among them, the heat pump return water pipe 31 is equipped with a ninth control valve 34, the low temperature outlet pipe 32 is equipped with a tenth control valve 35, and the first cold water outlet pipe 33 is equipped with an eleventh control valve 36.

[0043] In this embodiment, a sewage pipe 45 is also provided on the ground of the self-defrosting enclosed space 1, and a seventeenth control valve 46 is provided on the sewage pipe 45.

[0044] The output terminals of the first temperature sensor 4 and the second temperature sensor 5 are communicatively connected to the input terminals of the PLC control system, respectively, to transmit the detected temperature signals to the PLC control system. The PLC control system has a preset temperature difference threshold between the first temperature sensor 4 and the second temperature sensor 5. The input terminals of the first control valve 10, the second control valve 11, the louver actuator, the heat exchanger 6, the fan 7, the third control valve 22, the fourth control valve 24, the fifth control valve 25, the sixth control valve 27, the seventh control valve 28, the eighth control valve 30, the ninth control valve 34, the tenth control valve 35, the eleventh control valve 36, the seventeenth control valve 46, the first water pump 23, the second water pump 26, and the third water pump 29 are all communicatively connected to the output terminals of the PLC control system, and are controlled by the PLC control system according to the set program.

[0045] The usage process of this embodiment is as follows: When the air source heat pump 3 is heating normally, the louvers 2 on the self-defrosting enclosed space 1 are in the open state, and the self-defrosting enclosed space 1 is ventilated normally; at this time, the PLC control system controls the opening of the third control valve 22, the fourth control valve 24, the fifth control valve 25, the sixth control valve 27, the seventh control valve 28, the eighth control valve 30, the ninth control valve 34, the tenth control valve 35, the eleventh control valve 36, the first water pump 23, the second water pump 26, and the third water pump 29, so that the hot water after heat exchange by the air source heat pump 3, the solar energy collection system 12, the geothermal energy collection system 13, and the sewage energy collection system 14 passes through the high temperature inlet pipe 17, the energy storage system 15, the high temperature outlet pipe 18, the absorption heat pump unit system 16, the first hot water outlet pipe 19, and the user inlet pipe 21 to provide heat to the user equipment 20, such as the radiator. After heating, the cold water flows sequentially through the user outlet pipe 44, the heat pump return pipe 31, the absorption heat pump unit system 16, the low temperature outlet pipe 32, and the energy storage system 15. After waste heat recovery, it is transmitted through the first cold water outlet pipe 33 to the inlet of the air source heat pump equipment 3, the inlet of the solar energy collection system 12, the inlet of the geothermal energy collection system 13, and the inlet of the wastewater energy collection system 14 for circulating heating.

[0046] When it is nighttime or when there is a large temperature difference, the first temperature sensor 4 and the second temperature sensor 5 continuously monitor the temperature of the inlet and outlet of the air source heat pump 3 in real time and transmit the temperature signal to the PLC control system. The PLC control system compares the temperature difference between the inlet and outlet of the air source heat pump 3. When the temperature difference between the inlet and outlet of the air source heat pump 3 is less than or equal to the threshold of 8°C, it indicates that the air source heat pump 3 is frosting and the self-defrosting is activated.

[0047] During the self-defrosting process, the PLC control system controls the rotation angle of the louver 2 blades through the louver driver, so that the self-defrosting enclosed space 1 is in a closed state. Then, it controls the opening of the first control valve 10, the second control valve 11, the heat exchanger 6, the fan 7, and the seventeenth control valve 46, so that the hot water in the absorption heat pump unit system 16 enters the heat exchanger 6 through the first hot water outlet pipe 19 and the defrost inlet pipe 8. The cooling water after heat exchange in the heat exchanger 6 re-enters the air source equipment 3, the solar energy collection system 12, the geothermal energy collection system 13, and the sewage energy collection system 14 through the defrost outlet pipe 9 for heating, and then enters the energy storage system 15 and the absorption heat pump unit system 16. The heat contained in the air source, solar energy, geothermal energy, and sewage energy is used to circulate and defrost the air source equipment 3.

[0048] When the temperature difference between the first temperature sensor 4 and the second temperature sensor 5 received by the PLC control system is greater than the threshold, the first control valve 10, the second control valve 11, the heat exchanger 6, and the fan 7 are closed, the louvers 2 are opened, and defrosting is stopped.

[0049] In this embodiment, the temperature difference threshold between the first temperature sensor 4 and the second temperature sensor 5 preset in the PLC control system can be set according to the actual situation.

[0050] Example 2

[0051] like Figure 3 As shown, this embodiment is a self-defrosting device for air source heat pumps, and its structural difference from Embodiment 1 is only in that:

[0052] ① It also includes a second hot water outlet pipe 37, the outlet of the air source heat pump 3, the outlet of the solar energy collection system 12, the outlet of the geothermal energy collection system 13 and the outlet of the sewage energy collection system 14 are connected to one end of the second hot water outlet pipe 37, and the other end of the second hot water outlet pipe 37 is connected to the first hot water outlet pipe 19 between the seventh control valve 28 and the third water pump 29.

[0053] A twelfth control valve 38 is installed at the end of the second hot water outlet pipe 37 that connects to the outlet of the air source heat pump 3, the outlet of the solar energy collection system 12, the outlet of the geothermal energy collection system 13, and the outlet of the sewage energy collection system 14. A thirteenth control valve 39 is installed at the end of the second hot water outlet pipe 37 that connects to the first hot water outlet pipe 19. The input ends of the twelfth control valve 38 and the thirteenth control valve 39 are both connected to the output end of the PLC control system and are controlled by the PLC control system according to the set program.

[0054] At noon, when the air source heat pump 3 frosts, the PLC control system closes the louvers 2 and opens the first control valve 10, the second control valve 11, the heat exchanger 6, the fan 7, the seventeenth control valve 46, the ninth control valve 34, the tenth control valve 35, the eleventh control valve 36, the twelfth control valve 38, the thirteenth control valve 39, the third water pump 29, and the eighth control valve 30, while closing other valves and water pumps. At this time, the hot water after heat exchange with the air source heat pump 3, the solar energy collection system 12, the geothermal energy collection system 13, and the wastewater energy collection system 14 directly flows through the second hot water outlet pipe 37, then through the first hot water outlet pipe 19 and the defrost inlet pipe 8 to defrost the air source heat pump 3, and then through the user inlet pipe 21 to provide heat to the user equipment 20 and recover waste heat.

[0055] ② In this embodiment, a second cold water outlet pipe 40 is also included. The heat pump return water pipe 31 and the user outlet pipe 44 of the heat user equipment 20 are all connected to one end of the second cold water outlet pipe 40. The other end of the second cold water outlet pipe 40 is connected to the inlet of the air source heat pump 3, the inlet of the solar energy collection system 12, the inlet of the geothermal energy collection system 13, and the inlet of the wastewater energy collection system 14. A fourteenth control valve 41 is provided on the second cold water outlet pipe 40. The input end of the fourteenth control valve 41 is communicatively connected to the output end of the PLC control system and is controlled by the PLC control system according to the set program.

[0056] When recycling the cold water passing through the heat user equipment 20, the ninth control valve 34, the tenth control valve 35, and the eleventh control valve 36 can be closed, and the fourteenth control valve 41 can be opened. The cold water passing through the heat user equipment 20 can be directly transmitted through the user outlet pipe 44 and the second cold water outlet pipe 40 to the inlet of the air source heat pump equipment 3, the solar energy collection system 12, the geothermal energy collection system 13, and the wastewater energy collection system 14 for recycling.

[0057] ③ In this embodiment, the high-temperature water inlet pipe 17 and the first cold water outlet pipe 33 are also connected by a pipeline, on which a fifteenth control valve 42 is provided; the user water inlet pipe 21 and the user water outlet pipe 44 of the heat user equipment 20 are also connected by a pipeline, on which a sixteenth control valve 43 is provided. The input terminals of the fifteenth control valve 42 and the sixteenth control valve 43 are communicatively connected to the output terminal of the PLC control system and are controlled by the PLC control system according to the set program.

[0058] When the air source heat pump 3, solar energy collection system 12, geothermal energy collection system 13, and wastewater energy collection system 14 are unable to collect heat under extremely severe weather conditions, the third control valve 22, the fourth control valve 24, the first water pump 23, the fifteenth control valve 42, and the eleventh control valve 36 can be opened, and the water passing through the air source heat pump 3, solar energy collection system 12, geothermal energy collection system 13, and wastewater energy collection system 14 can be directly returned to the source.

[0059] Alternatively, the twelfth control valve 38, the thirteenth control valve 39, the third water pump 29, the eighth control valve 30, the sixteenth control valve 43, and the fourteenth control valve 41 can be opened to allow water from the air source heat pump 3, the solar energy collection system 12, the geothermal energy collection system 13, and the wastewater collection system 14 to be directly returned to the source.

[0060] In this embodiment, the specific flow selection of the pipeline can be set according to the actual situation and controlled by the PLC control system according to the set program.

[0061] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles described in the claims of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A self-defrosting device for air source heat pump equipment, characterized in that, It includes a self-defrosting enclosed space with louvers for installing air-source heat pumps, and also includes a PLC control system, a louver actuator for controlling the rotation angle of the louver blades, a first temperature sensor, and a second temperature sensor; wherein: The self-defrosting enclosed space is sealed and ventilated through louvers; The first temperature sensor and the second temperature sensor are respectively located at the water inlet and water outlet of the air source heat pump; a heat exchanger is provided in front of the air source heat pump, and a fan is provided in front of the heat exchanger to blow the heat from the heat exchanger toward the air source heat pump. The inlet of the heat exchanger is connected to the outlet of the energy storage coupled heat pump system through a defrost inlet pipe, and the outlet of the heat exchanger is connected to the inlet of the energy storage coupled heat pump system through a defrost outlet pipe; a first control valve is provided on the defrost inlet pipe, and a second control valve is provided on the defrost outlet pipe. The output terminals of the first temperature sensor and the second temperature sensor are respectively connected to the input terminal of the PLC control system. The output terminal of the PLC control system is also connected to the input terminal of the first control valve, the input terminal of the second control valve, the input terminal of the louver actuator, the input terminal of the heat exchanger, and the input terminal of the fan. The PLC control system has a preset temperature difference threshold between the first temperature sensor and the second temperature sensor.

2. The air source heat pump self-defrosting device according to claim 1, characterized in that, The energy storage coupled heat pump system includes air source heat pump equipment, solar energy collection system, geothermal energy collection system, wastewater energy collection system, energy storage system, and absorption heat pump unit system; The outlet of the heat exchanger is connected to the inlet of the air source heat pump, the inlet of the solar energy collection system, the inlet of the geothermal energy collection system, and the inlet of the wastewater energy collection system via a defrost outlet pipe. The outlets of the air source heat pump, the solar energy collection system, the geothermal energy collection system, and the wastewater energy collection system are all connected to the hot end inlet of the energy storage system via high-temperature inlet pipes. The hot end outlet of the energy storage system is connected to the hot end inlet of the absorption heat pump unit system via a high-temperature outlet pipe. The hot end outlet of the absorption heat pump unit system is connected to the defrost inlet pipe and the user inlet pipe of the heat user equipment via a first hot water outlet pipe. The high-temperature water inlet pipe is sequentially equipped with a third control valve, a first water pump, and a fourth control valve; the high-temperature water outlet pipe is sequentially equipped with a fifth control valve, a second water pump, and a sixth control valve; and the first hot water outlet pipe is sequentially equipped with a seventh control valve, a third water pump, and an eighth control valve. The cold end inlet of the absorption heat pump unit system is connected to the user outlet pipe of the heat user equipment through the heat pump return pipe; the cold end outlet of the absorption heat pump unit system is connected to the cold end inlet of the energy storage system through the low temperature outlet pipe; the cold end outlet of the energy storage system is connected to the inlet of the air source heat pump equipment, the inlet of the solar energy collection system, the inlet of the geothermal energy collection system, and the inlet of the wastewater energy collection system through the first cold water outlet pipe. The heat pump return pipe is equipped with a ninth control valve, the low-temperature water outlet pipe is equipped with a tenth control valve, and the first cold water outlet pipe is equipped with an eleventh control valve; the input terminals of the third to eleventh control valves and the first to third water pumps are respectively connected to the output terminal of the PLC control system.

3. The air source heat pump self-defrosting device according to claim 2, characterized in that, It also includes a second hot water outlet pipe, and the outlets of the air source heat pump, the solar energy collection system, the geothermal energy collection system, and the sewage energy collection system are all connected to the same end of the second hot water outlet pipe, and a twelfth control valve is provided at that end of the second hot water outlet pipe. The other end of the second hot water outlet pipe is connected to the first hot water outlet pipe located between the seventh control valve and the third water pump, and the second hot water outlet pipe is equipped with a thirteenth control valve at this end. The input terminals of the twelfth and thirteenth control valves are respectively connected to the output terminals of the PLC control system for communication.

4. The air source heat pump self-defrosting device according to claim 2 or 3, characterized in that, It also includes a second cold water outlet pipe, wherein the heat pump return water pipe and the user outlet pipe of the heat user equipment are both connected to one end of the second cold water outlet pipe, and the other end of the second cold water outlet pipe is connected to the water inlet of the air source equipment, the water inlet of the solar energy collection system, the water inlet of the geothermal energy collection system and the water inlet of the sewage energy collection system. The fourteenth control valve is installed on the second cold water outlet pipe; the input of the fourteenth control valve is communicatively connected to the output of the PLC control system.

5. The air source heat pump self-defrosting device according to claim 4, characterized in that, The high-temperature water inlet pipe is connected to the first cold water outlet pipe through a pipeline, and a fifteenth control valve is installed on the pipeline; the input end of the fifteenth control valve is communicatively connected to the output end of the PLC control system.

6. The air source heat pump self-defrosting device according to claim 5, characterized in that, The user water inlet pipe and user water outlet pipe of the heat user equipment are connected by a pipeline. A sixteenth control valve is installed on the pipeline. The input end of the sixteenth control valve is communicatively connected to the output end of the PLC control system.

7. The air source heat pump self-defrosting device according to any one of claims 1 to 3, 5 and 6, characterized in that, A sewage pipe is installed on the ground of the self-defrosting enclosed space. A seventeenth control valve is installed on the sewage pipe. The input end of the seventeenth control valve is communicatively connected to the output end of the PLC control system.

8. The air source heat pump self-defrosting device according to claim 4, characterized in that, A sewage pipe is installed on the ground of the self-defrosting enclosed space. A seventeenth control valve is installed on the sewage pipe. The input end of the seventeenth control valve is communicatively connected to the output end of the PLC control system.

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