Hydrate-based cold storage / heat storage air conditioning system and method based on reverse heat exchange strategy

Abstract

The application discloses a hydrate cold / heat storage air conditioning system based on a reverse heat exchange strategy, which comprises a cold and heat source, a heat pump unit, a hydrate cold / heat storage tank, a reverse heat exchange coil, an internal circulation airflow disturbance module, a terminal energy supply module, a data acquisition module and an automatic control module. The cold and heat source provides a cold source and a heat source for the heat pump unit, the heat pump unit provides a cold carrier or a heat carrier with a suitable temperature, the reverse heat exchange coil in the hydrate energy storage tank is used for heat exchange, the internal circulation airflow disturbance module accelerates hydrate formation, the terminal energy supply module is provided with a horizontal surface-mounted fan coil, and the automatic control module is used for realizing centralized control of temperature and humidity in a machine room. In addition, the application can realize three cooling / heating modes by adjusting electric valves, so as to meet different application requirements. The application realizes rapid hydrate cold / heat storage energy storage by means of the reverse heat exchange strategy, improves the cold / heat storage efficiency, and has the advantages of efficient terminal energy upgrading.

Description

TECHNICAL FIELD

[0001] The present application relates to the fields of commercial refrigeration, heating, energy storage, grid resource peak shaving, and particularly relates to a hydrate cold / heat storage pilot energy storage system based on a reverse heat exchange strategy. BACKGROUND

[0002] China's power industry, as one of the basic industries of the national economy, has made great progress. However, the expansion of power still cannot meet the needs of the rapid development of the national economy and the sharp increase of people's living electricity, and the situation of power shortage still exists in the country. The cold / heat storage technology can alleviate this situation. The commonly used cold / heat storage working medium at present is: water, ice, eutectic salt. The main disadvantage of water cold storage system is small cold storage density (20-30 kWh / m 3 ), large space occupation. The ice cold storage system has a cold storage temperature lower than -5℃, resulting in low operating efficiency and 30% higher energy consumption loss than ordinary heat pump units. The eutectic salt heat storage system has problems such as material loss, dissociation inactivation, and low efficiency. As a new type of energy storage technology, hydrate cold / heat storage technology can overcome the above-mentioned shortcomings of water, ice, and eutectic salt cold / heat storage technology. However, since the hydrate cold / heat storage mechanism is not clear, the hydrate cold / heat storage technology is still at the laboratory stage, and mainly small cold / heat storage systems, which do not have practical application ability. SUMMARY

[0003] Therefore, the present application discloses a hydrate cold / heat storage air conditioning system based on a reverse heat exchange strategy for a pilot test, and the specific scheme is as follows:

[0004] The hydrate cold / heat storage air conditioning system based on a reverse heat exchange strategy comprises a refrigeration / heating module, an energy storage module, a heat exchange module, an end energy supply module, and a medium conveying pipe network.

[0005] The refrigeration / heating module comprises a cold heat source, a cold heat source water pump set, a fifth main pipe, and a heat pump unit. The cold heat source is connected with the heat pump unit through the fifth main pipe, and the cold heat source water pump set is arranged on the fifth main pipe.

[0006] The energy storage module comprises a hydrate energy storage tank, a reverse heat exchange coil, and a hydrate cold / heat storage working medium. The reverse heat exchange coil and the hydrate cold / heat storage working medium are arranged in the hydrate energy storage tank. The heat pump unit is connected with the reverse heat exchange coil arranged in the hydrate energy storage tank through the medium conveying pipe network, and the medium conveying pipe network is provided with a cold / heat carrier. The reverse heat exchange coil comprises first and second coils with the same shape and length. The first coil is arranged adjacent to the second coil, and the distance between the first coil and the second coil along the extension direction of the two coils is always the same. The first coil and the second coil are respectively in communication with the medium conveying pipe network, and the fluid flow directions in the two coils are opposite.

[0007] The heat exchange module comprises a plate heat exchanger, one end of the plate heat exchanger is connected with the heat pump unit and the reverse heat exchange coil through a medium conveying pipe network, and the other end is connected with the terminal energy supply module.

[0008] The terminal energy supply module comprises a heat dissipation device, a sixth main pipe and a seventh main pipe, the first end of the sixth main pipe is connected with the plate heat exchanger, and the second end of the sixth main pipe is connected with the heat dissipation device; the first end of the seventh main pipe is connected with the plate heat exchanger, and the second end of the seventh main pipe is connected with the heat dissipation device.

[0009] As a supplement to the technical scheme of the present application, the cold and hot source water pump group is provided with at least two water pumps, and the water pumps are connected in parallel on the fifth main pipe.

[0010] As a supplement to the technical scheme of the present application, the energy storage module further comprises an internal circulation airflow disturbance module, the internal circulation airflow disturbance module is arranged in the hydrate energy storage tank and comprises an air pump and a flow dividing device, the air pump is arranged at the bottom of the hydrate energy storage tank, the top of the hydrate energy storage tank is provided with an opening, the opening is connected with the air pump through a pipeline, and the air pump sends the air in the top space of the hydrate energy storage tank to the flow dividing device.

[0011] The flow dividing device is immersed in the hydrate cold / heat storage medium in the hydrate energy storage tank, the flow dividing device is provided with a containing space for receiving the air sent by the air pump, and the surface of the flow dividing device is provided with an air outlet.

[0012] As a supplement to the technical scheme of the present application, a data acquisition module is further included, the data acquisition module comprises a sensor group arranged in the hydrate energy storage tank, and the sensor group comprises a temperature sensor and a stress sensor.

[0013] As a supplement to the technical scheme of the present application, a system monitoring module is further included, the system monitoring module comprises an underwater camera and a searchlight, and the underwater camera and the searchlight are arranged in the hydrate energy storage tank and used for monitoring the state of the hydrate cold / heat storage medium in the hydrate energy storage tank.

[0014] As a supplement to the technical scheme of the present application, an automatic control module is further included, and the automatic control module is connected with the refrigeration / heating module, the energy storage module, the heat exchange module, the terminal energy supply module, the medium conveying pipe network, the data acquisition module and the system monitoring module.

[0015] As a supplement to the technical scheme of the present application, the terminal cooling module further comprises a terminal water pump group, the terminal water pump group is arranged on the sixth main pipe, and the terminal water pump group comprises at least two water pumps connected in parallel.

[0016] As a supplement to the technical scheme of the application, the medium conveying pipe network comprises a first main pipe, a second main pipe, a third main pipe, a fourth main pipe, a first branch pipe, a second branch pipe, a carrier coolant / heat carrier pump set, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, and a fifth electromagnetic valve.

[0017] The first end of the first main pipe is in communication with the heat pump set, and the second end of the first main pipe is in communication with the reverse heat exchange coil. The first end of the second main pipe is in communication with the reverse heat exchange coil, and the second end of the second main pipe is in communication with the heat pump set. The carrier coolant / heat carrier pump set is arranged on the second main pipe. The first electromagnetic valve is arranged on the second main pipe and located between the carrier coolant / heat carrier pump set and the first end of the second main pipe. The fifth electromagnetic valve is arranged on the first main pipe.

[0018] The first end of the third main pipe is in communication with the plate heat exchanger, and the second end of the third main pipe is in communication with the second main pipe. The position where the third main pipe is in communication with the second main pipe is located between the carrier coolant / heat carrier pump set and the first electromagnetic valve. The first end of the first branch pipe is in communication with the first main pipe, and the position where the first branch pipe is in communication with the first main pipe is located between the fifth electromagnetic valve and the first end of the first main pipe. The second end of the first branch pipe is in communication with the second main pipe, and the position where the first branch pipe is in communication with the second main pipe is located between the first electromagnetic valve and the first end of the second main pipe. The fourth electromagnetic valve is arranged on the first branch pipe. The first end of the fourth main pipe is in communication with the plate heat exchanger, and the second end of the fourth main pipe is in communication with the first branch pipe. The position where the fourth main pipe is in communication with the first branch pipe is located between the fourth electromagnetic valve and the second end of the first branch pipe. The second electromagnetic valve is arranged on the fourth main pipe.

[0019] The first end of the second branch pipe is in communication with the first main pipe, and the position where the first end of the second branch pipe is in communication with the first main pipe is located between the first end of the first main pipe and the first end of the first branch pipe. The second end of the second branch pipe is in communication with the second main pipe, and the position where the second end of the second branch pipe is in communication with the second main pipe is located between the second end of the second main pipe and the carrier coolant / heat carrier pump set.

[0020] The application also discloses a use method of the above-mentioned hydrate cold storage / heat storage air conditioning system based on the reverse heat exchange strategy, which comprises the following steps:

[0021] Cold storage:

[0022] In this mode, the hydrate cold storage working medium should be arranged in the hydrate energy storage tank, and the carrier coolant should be arranged in the medium conveying pipe network. The first electromagnetic valve, the fifth electromagnetic valve, the carrier coolant / heat carrier pump set, the cold and heat source water pump set, and the heat pump set are opened. The second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, and the plate heat exchanger are closed.

[0023] The cold and heat source water pump group transports the cold water at the cold and heat source to the heat pump unit. The heat exchange of the heat transfer medium in the water pipe network is carried out at the heat pump unit. The cold supply is carried out to the heat transfer medium. Then, the heat transfer medium is transported to the reverse heat exchange coil through the heat transfer medium / heat carrier pump group through the first main pipeline. The heat exchange of the heat transfer medium is carried out with the hydrate cold storage medium in the hydrate storage tank. Then, the heat transfer medium is returned to the heat pump unit through the second main pipeline.

[0024] The hydrate storage tank supplies cold water alone:

[0025] The second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the plate heat exchanger, and the heat transfer medium / heat carrier pump group are opened. The first electromagnetic valve, the cold and heat source water pump group, and the heat pump unit are closed.

[0026] The heat transfer medium / heat carrier pump group transports the heat transfer medium in the reverse heat exchange coil to the plate heat exchanger through the second main pipeline, the first branch pipeline, and the fourth main pipeline in sequence. The heat exchange of the heat transfer medium is carried out with the water in the sixth main pipeline. The heat transfer medium after the heat exchange flows into the second main pipeline through the third main pipeline. The heat transfer medium is divided into two streams at the second end position of the second branch pipeline. The first stream of the heat transfer medium flows into the first main pipeline through the second branch pipeline. The second stream of the heat transfer medium flows into the heat pump unit through the second main pipeline. Then, the heat transfer medium flows out of the heat pump unit into the first main pipeline. The heat transfer medium is combined with the first stream of the heat transfer medium at the first end position of the second branch pipeline. The combined heat transfer medium flows into the reverse heat exchange coil through the first main pipeline. One heat transfer medium cold supply cycle is completed.

[0027] The water in the sixth main pipeline and the seventh main pipeline circulates between the plate heat exchanger and the terminal energy supply module. The water takes cold in the plate heat exchanger and releases cold at the terminal energy supply module.

[0028] In the above process, the opening degrees of the fourth electromagnetic valve and the fifth electromagnetic valve are adjusted to adjust the temperature of the heat transfer medium returned to the reverse heat exchange coil after the heat exchange. When it is needed to reduce the temperature of the heat transfer medium returned to the reverse heat exchange coil, the opening degree of the fourth electromagnetic valve is increased, and the opening degree of the fifth electromagnetic valve is decreased. When it is needed to increase the temperature of the heat transfer medium returned to the reverse heat exchange coil, the opening degree of the fourth electromagnetic valve is decreased, and the opening degree of the fifth electromagnetic valve is increased.

[0029] The heat pump unit supplies cold water alone:

[0030] The second electromagnetic valve, the fourth electromagnetic valve, the cold and heat source water pump group, the heat pump unit, the heat transfer medium / heat carrier pump group, and the plate heat exchanger are opened. The first electromagnetic valve, the third electromagnetic valve, and the fifth electromagnetic valve are closed.

[0031] The cold and heat source water pump group transports the cold water at the cold and heat source to the heat pump unit, the heat exchange of the carrier refrigerant in the medium water pipe network is carried out at the heat pump unit, the carrier refrigerant is supplied with cold for the first time, then the carrier refrigerant in the heat pump unit is transported to the reverse heat exchange coil through the first main pipe by the carrier refrigerant / heat carrier pump group, the hydrate in the hydrate energy storage tank supplies the carrier refrigerant flowing into the reverse heat exchange coil with cold for the second time, then the carrier refrigerant is sequentially transported to the plate heat exchanger through the second main pipe, the first branch pipe and the fourth main pipe, and is exchanged with the water arranged in the sixth main pipe, the carrier refrigerant after the heat exchange is transported into the second main pipe through the third main pipe, and is returned to the heat pump unit through the second main pipe, so that the carrier refrigerant cooling cycle is completed.

[0032] The cooling water in the sixth main pipe and the seventh main pipe circulates between the plate heat exchanger and the terminal energy supply module, the cooling water takes cold in the plate heat exchanger, and releases cold at the terminal energy supply module.

[0033] The heat pump unit and the hydrate energy storage tank jointly supply cold:

[0034] The second electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the cold and heat source water pump group, the heat pump unit, the carrier refrigerant / heat carrier pump group and the plate heat exchanger are opened, and the first electromagnetic valve and the third electromagnetic valve are closed.

[0035] The cold and heat source water pump group transports the cold water at the cold and heat source to the heat pump unit, the heat exchange of the carrier refrigerant in the medium water pipe network is carried out at the heat pump unit, the carrier refrigerant is supplied with cold for the first time, then the carrier refrigerant in the heat pump unit is transported to the reverse heat exchange coil through the first main pipe by the carrier refrigerant / heat carrier pump group, the hydrate in the hydrate energy storage tank supplies the carrier refrigerant flowing into the reverse heat exchange coil with cold for the second time, then the carrier refrigerant is sequentially transported to the plate heat exchanger through the second main pipe, the first branch pipe and the fourth main pipe, and is exchanged with the water arranged in the sixth main pipe, the carrier refrigerant after the heat exchange is transported into the second main pipe through the third main pipe, and is returned to the heat pump unit through the second main pipe, so that the carrier refrigerant cooling cycle is completed.

[0036] The cooling water in the sixth main pipe and the seventh main pipe circulates between the plate heat exchanger and the terminal energy supply module, the cooling water takes cold in the plate heat exchanger, and releases cold at the terminal energy supply module.

[0037] In the above process, the opening degrees of the fourth electromagnetic valve and the fifth electromagnetic valve are adjusted to adjust the temperature of the carrier refrigerant flowing into the reverse heat exchange coil; when it is needed to reduce the temperature of the carrier refrigerant returning to the reverse heat exchange coil, the opening degree of the fourth electromagnetic valve is increased, and the opening degree of the fifth electromagnetic valve is reduced; when it is needed to increase the temperature of the carrier refrigerant returning to the reverse heat exchange coil, the opening degree of the fourth electromagnetic valve is reduced, and the opening degree of the fifth electromagnetic valve is increased.

[0038] As a preferred technical scheme of the present application, the use method of the hydrate cold storage air conditioning system based on the reverse heat exchange strategy further comprises:

[0039] Heat storage:

[0040] In this mode, the hydrate storage tank should be provided with hydrate heat storage medium, and the medium water pipe network is provided with heat carrier; the first electromagnetic valve, the fifth electromagnetic valve, the coolant / heat carrier pump group, the cold and heat source water pump group, and the heat pump unit are opened; the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, and the plate heat exchanger are closed.

[0041] The cold and heat source water pump group transports hot water at the cold and heat source to the heat pump unit, and the heat carrier in the medium water pipe network exchanges heat at the heat pump unit to supply heat to the heat carrier, which is then transported to the reverse heat exchange coil through the coolant / heat carrier pump group via the first main pipeline, exchanges heat with the hydrate heat storage medium in the hydrate storage tank, and then returns to the heat pump unit through the second main pipeline;

[0042] Hydrate storage tank heat supply alone:

[0043] The second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the plate heat exchanger, and the coolant / heat carrier pump group are opened; the first electromagnetic valve, the cold and heat source water pump group, and the heat pump unit are closed.

[0044] The coolant / heat carrier pump group opens to transport the heat carrier in the reverse heat exchange coil to the plate heat exchanger through the second main pipeline, the first branch pipeline, and the fourth main pipeline in sequence, exchanges heat with the water in the sixth main pipeline, and the heat carrier after heat exchange flows into the second main pipeline through the third main pipeline, and at the second end position of the second branch pipeline, it is divided into two streams, the first stream flows into the first main pipeline through the second branch pipeline; the second stream flows into the heat pump unit through the second main pipeline, and then flows out from the heat pump unit to the first main pipeline, and at the first end position of the second branch pipeline, it converges with the first stream, and the converged heat carrier flows into the reverse heat exchange coil through the first main pipeline, completing the heat carrier heat supply cycle.

[0045] The water in the sixth main pipeline and the seventh main pipeline circulates between the plate heat exchanger and the end energy supply module, absorbs heat in the plate heat exchanger, and releases heat at the end energy supply module.

[0046] In the above process, the opening degrees of the fourth electromagnetic valve and the fifth electromagnetic valve are adjusted to adjust the temperature of the heat carrier returned to the reverse heat exchange coil after heat exchange; when it is necessary to increase the temperature of the heat carrier returned to the reverse heat exchange coil, the opening degree of the fourth electromagnetic valve is increased and the opening degree of the fifth electromagnetic valve is decreased; when it is necessary to decrease the temperature of the heat carrier returned to the reverse heat exchange coil, the opening degree of the fourth electromagnetic valve is decreased and the opening degree of the fifth electromagnetic valve is increased.

[0047] Heat pump unit heat supply alone:

[0048] Open the second solenoid valve, the fourth solenoid valve, the cold and heat source water pump group, the heat pump unit, the carrier coolant / heat carrier pump group, the plate heat exchanger; Close the first solenoid valve, the third solenoid valve, the fifth solenoid valve;

[0049] The cold and heat source water pump group transports hot water at the cold and heat source to the heat pump unit, and the heat carrier in the medium water pipe network exchanges heat at the heat pump unit to supply heat to the heat carrier, and then the heat carrier is driven by the carrier coolant / heat carrier pump group to flow into the first branch pipe at the first end position of the first branch pipe through the first main pipe, and then sequentially flows into the plate heat exchanger through the first branch pipe and the fourth main pipe, exchanges heat with the water arranged in the sixth main pipe, and the heat carrier after completing the heat exchange flows into the second main pipe through the third main pipe, and flows back to the heat pump unit through the second main pipe to complete a heat carrier heat supply cycle;

[0050] The water in the sixth main pipe and the seventh main pipe circulates between the plate heat exchanger and the terminal energy supply module, absorbs heat in the plate heat exchanger, and releases heat at the terminal energy supply module;

[0051] The heat pump unit and the hydrate energy storage tank supply heat jointly:

[0052] Open the second solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the cold and heat source water pump group, the heat pump unit, the carrier coolant / heat carrier pump group, the plate heat exchanger; Close the first solenoid valve, the third solenoid valve;

[0053] The cold and heat source water pump group transports hot water at the cold and heat source to the heat pump unit, and the heat carrier in the medium water pipe network exchanges heat at the heat pump unit to supply heat to the heat carrier, and then the heat carrier is driven by the carrier coolant / heat carrier pump group to flow into the first branch pipe at the first end position of the first branch pipe through the first main pipe, and then sequentially flows into the plate heat exchanger through the first branch pipe and the fourth main pipe, exchanges heat with the water arranged in the sixth main pipe, and the heat carrier after completing the heat exchange flows into the second main pipe through the third main pipe, and flows back to the heat pump unit through the second main pipe to complete a heat carrier heat supply cycle;

[0054] The water in the sixth main pipe and the seventh main pipe circulates between the plate heat exchanger and the terminal energy supply module, absorbs heat in the plate heat exchanger, and releases heat at the terminal energy supply module;

[0055] In the above process, the opening degree of the fourth solenoid valve and the fifth solenoid valve is adjusted to adjust the temperature of the heat carrier flowing into the reverse heat exchange coil; when it is needed to increase the temperature of the heat carrier flowing back to the reverse heat exchange coil, the opening degree of the fourth solenoid valve is increased and the opening degree of the fifth solenoid valve is decreased; when it is needed to decrease the temperature of the heat carrier flowing back to the reverse heat exchange coil, the opening degree of the fourth solenoid valve is decreased and the opening degree of the fifth solenoid valve is increased.

[0056] Beneficial effects: the application provides a pilot-scale complete storage-release cold / heat system, which is used for the cold / heat supply demand of large commercial buildings, fully utilizes the latent heat generated by the cage hydrate phase change, and realizes high efficient energy storage based on the reverse heat exchange strategy, so that the application has the advantages of high efficiency, energy saving and long-term stable operation, and is especially suitable for the scene of continuous cold energy / heat energy supply. The main machine used in the application is a multi-working-condition heat pump unit, and the COP value of the hydrate cold storage / heat storage material is close to 5.0 in the hydrate cold storage operation mode, so that the application has strong economy and energy saving. BRIEF DESCRIPTION OF DRAWINGS

[0057] Figure 1 It is a structure schematic diagram of the hydrate cold storage / heat storage energy storage system based on the reverse heat exchange strategy of the application.

[0058] Figure 2 It is a schematic diagram of fluid flow in the pipeline during cold storage / heat storage of the application.

[0059] Figure 3 It is a schematic diagram of fluid flow in the pipeline during cold storage / heat storage of the hydrate energy storage tank of the application.

[0060] Figure 4 It is a schematic diagram of fluid flow in the pipeline during cold storage / heat storage of the heat pump unit of the application.

[0061] Figure 5 It is a schematic diagram of fluid flow in the pipeline during cold storage / heat storage of the heat pump unit and the hydrate energy storage tank of the application.

[0062] Figure 6 It is a structure schematic diagram of the reverse heat exchange coil of the application.

[0063] In the figure: 1. cold and heat source, 2. fifth main pipeline, 3. cold and heat source water pump group, 4. heat pump unit, 5. cold and heat carrier pump group, 6. plate heat exchanger, 7. terminal water pump group, 8. sixth main pipeline, 9. seventh main pipeline, 10. air pump, 11. flow dividing device, 12. air outlet, 13. data acquisition module, 14. automatic control module, 15. sensor group, 16. system monitoring module, 17. hydrate energy storage tank, 18. reverse heat exchange coil, 19. terminal energy supply module, 20. fan coil, 21. first coil, 22. second coil, 23. first main pipeline, 24. second main pipeline, 25. third main pipeline, 26. fourth main pipeline, 27. first branch pipeline, 28. second branch pipeline, 29. first electromagnetic valve, 30. second electromagnetic valve, 31. third electromagnetic valve, 32. fourth electromagnetic valve, 33. fifth electromagnetic valve. DETAILED DESCRIPTION

[0064] In the description of the present application, it is to be understood that the terms "first", "second", "third" and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of use in either order. It is to be understood that the term "including", used in the description and the claims, should be interpreted as "including but not limited to". It will be further understood that the terms "comprises" and / or "comprising", or "includes" and / or "including" when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and / or groups thereof.

[0065] In the present application, unless specifically defined otherwise, the terms "mounting", "connection", "connecting", "fixed", and the like are to be construed broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0066] As shown in the accompanying drawings, Figures 1 to 6 The hydrate cold / heat storage air conditioning system based on the reverse heat exchange strategy is a cold / heat storage and cold / heat release pilot system, which comprises a refrigeration / heating module, an energy storage module, a heat exchange module, an end energy supply module and a medium conveying pipe network.

[0067] The refrigeration / heating module comprises a cold and heat source 1, a cold and heat source water pump set 3, a fifth main pipe 2 and a heat pump unit 4. The cold and heat source 1 is connected with the heat pump unit 4 through the fifth main pipe 2, and the cold and heat source water pump set 3 is arranged on the fifth main pipe 2. The refrigeration / heating module is used for refrigeration or heating.

[0068] When refrigeration is needed, the cold and heat source 1 extracts underground water with a lower temperature, and sends cold water to the cold and heat source water pump set 3 through the cold and heat source water pump set 3 and the fifth main pipe 2. The cold and heat source water pump set 3 absorbs cold energy by heat exchange with the cold water. When heating is needed, the cold and heat source 1 extracts underground water with a higher temperature, and sends hot water to the cold and heat source water pump set 3 through the cold and heat source water pump set 3 and the fifth main pipe 2. The cold and heat source water pump set 3 absorbs heat by heat exchange with the hot water.

[0069] Preferably, the heat pump unit 4 is a multi-working-condition heat pump unit 4. The heat pump unit is preferably a multi-working-condition heat pump unit 4 with two working conditions of -81.5℃ and 40-60℃.

[0070] The energy storage module comprises a hydrate energy storage tank 17, which is a sealed container structure, and is internally provided with a reverse heat exchange coil 18 and a hydrate cold storage / heat storage working medium, and the reverse heat exchange coil 18 is immersed in the hydrate cold storage / heat storage working medium. The heat pump unit 4 is connected with the reverse heat exchange coil 18 through a medium conveying pipe network, and the medium conveying pipe network is internally provided with a cold carrier or a heat carrier, which is subjected to heat exchange in the heat pump unit 4 and is conveyed into the reverse heat exchange coil 18 to exchange heat with the hydrate in the hydrate energy storage tank 17, so as to realize the cold storage / heat storage of the hydrate cold storage / heat storage working medium.

[0071] Specifically, when the hydrate energy storage tank 17 needs to be cold stored, the hydrate cold storage working medium should be arranged in the hydrate energy storage tank 17, and the refrigerated cold carrier is conveyed from the heat pump unit 4 to the reverse heat exchange coil 18, and the hydrate cold storage working medium in the hydrate energy storage tank 17 exchanges heat with the cold carrier, so as to realize the cold storage.

[0072] When the hydrate energy storage tank 17 needs to be heat stored, the hydrate heat storage working medium should be arranged in the hydrate energy storage tank 17, and the heated heat carrier is conveyed from the heat pump unit 4 to the reverse heat exchange coil 18, and the hydrate heat storage working medium in the hydrate energy storage tank 17 exchanges heat with the heat carrier, so as to realize the heat storage.

[0073] The size of the hydrate energy storage tank 17 is preferably 6m×3m×2.5m, and the internal hydrate cold storage / heat storage working medium space accounts for 8 / 10. The reverse heat exchange coil 18 is arranged in the hydrate energy storage tank 17 and immersed in the hydrate cold storage / heat storage working medium. The cold carrier is preferably a 25% volume concentration ethylene glycol aqueous solution, and the heat carrier is preferably clean water containing additives.

[0074] The reverse heat exchange coil 18 is two pipes arranged in parallel and adjacent to each other, and the fluid flows in opposite directions in the two pipes, so that the temperatures of different spaces in the hydrate energy storage tank 17 are basically consistent, thereby realizing more, more stable and more efficient energy storage of the hydrate. The lengths and shapes of the two coils are the same, and the two coils are arranged adjacent to each other, specifically, the distance between the two coils along the extension direction of the two coils is always the same. As shown in Figure 6 the heat exchange coil structure diagram, comprising a first coil 21 and a second coil 22, both of which are "S" shaped and arranged adjacent to each other. The first coil 21 and the second coil 22 are in communication with the medium conveying pipe network, wherein the first end (upper end) opening of the first coil 21 is the water inlet, and the first end (upper end) opening of the second coil 22 is the water outlet, and the first end of the first coil 21 is arranged adjacent to the first end of the second coil 22; the second end (lower end) opening of the first coil 21 is the water outlet, and the second end (lower end)The opening is a water inlet, the second end of the first coil pipe 21 is arranged adjacent to the second end of the second coil pipe 22, and through the above arrangement, the fluid flow directions in the first coil pipe 21 and the second coil pipe 22 are opposite.

[0075] Due to the heat exchange between the cold carrier / heat carrier and the hydrate, when the first coil pipe 21 and the second coil pipe 22 are used to transport the cold carrier, the temperature of the cold carrier is the lowest at the water inlet position and the highest at the water outlet position in the first and second coil pipes, and due to the opposite flow directions of the cold carrier in the two coil pipes, the temperatures of the hydrates around the two coil pipes are basically consistent. Compared with the arrangement that the flow directions of the media in the pipelines of the heat exchange coil pipes in the hydrate energy storage tank 17 are uniform, the temperature at the water outlet position of the two coil pipes is the highest, so that the temperature at the water outlet position of the heat exchange coil pipe cannot reach the hydrate energy storage condition, and the hydrate energy storage efficiency is reduced.

[0076] When the first coil pipe 21 and the second coil pipe 22 are used to transport the heat carrier, the temperature of the heat carrier is the highest at the water inlet position and the lowest at the water outlet position in the first and second coil pipes, and due to the opposite flow directions of the heat carrier in the two coil pipes, the temperatures of the hydrates around the two coil pipes are basically consistent. Compared with the arrangement that the flow directions of the media in the pipelines of the heat exchange coil pipes in the hydrate energy storage tank 17 are uniform, the temperature at the water outlet position of the two coil pipes is the lowest, so that the temperature at the water outlet position of the heat exchange coil pipe cannot reach the hydrate energy storage condition, and the hydrate energy storage efficiency is reduced.

[0077] Preferably, the reverse heat exchange coil pipes 18 in the hydrate energy storage tank 17 are arranged in multiple groups, and the multiple groups of reverse heat exchange coil pipes 18 are connected with the medium transport pipe network through a flow divider. By arranging multiple groups of reverse heat exchange coil pipes 18, the contact area with the hydrate is increased, and the heat exchange efficiency is improved. The pipe diameter of the reverse heat exchange coil pipe 18 is preferably 26.7 mm, the vertical pipe spacing is preferably 95.25 mm, and the horizontal pipe spacing is 56.65 mm. In the present application, when the hydrate energy storage tank 17 needs to store cold, the hydrate energy storage working medium should be filled in the hydrate energy storage tank 17, and the hydrate energy storage working medium can be selected from alkane hydrate, new type of environmentally friendly refrigerant hydrate, carbon dioxide hydrate, and water-soluble organic hydrate. The alkane hydrate can be selected from methane, cyclopentane, etc., the new type of environmentally friendly refrigerant hydrate can be selected from R410A and R134a, and the water-soluble organic hydrate can be selected from THF, TBAB, and TBPB. The hydrate energy storage working medium is preferably TBAB with a mass fraction of 37wt%. In the present application, when the hydrate energy storage tank 17 needs to store heat, the hydrate heat storage working medium is preferably a composite hydrate.

[0078] The heat exchange module comprises a plate heat exchanger 6 connected with the heat pump unit 4 and the reverse heat exchange coil 18 through a medium conveying pipe network, and the heat pump unit 4 and the reverse heat exchange coil 18 can supply cold to the plate heat exchanger 6 in the cold release process. In the heat release process, the heat pump unit 4 and the reverse heat exchange coil 18 can supply heat to the plate heat exchanger 6.

[0079] The terminal energy supply module 19 is used for terminal cold release or heat release, and is connected with the plate heat exchanger 6 through the sixth main pipe 8 and the seventh main pipe 9. The plate heat exchanger 6 delivers cold or heat to the terminal energy supply module 19, and the terminal energy supply module 19 supplies cold or heat to the outside. The sixth main pipe 8 and the seventh main pipe 9 are filled with water. Specifically, the first end of the sixth main pipe 8 is connected with the plate heat exchanger 6, and the second end of the sixth main pipe 8 is connected with a heat dissipation device. The first end of the seventh main pipe 9 is connected with the plate heat exchanger 6, and the second end of the seventh main pipe 9 is connected with a heat dissipation device. Water flows into the terminal energy supply module 19 through the sixth main pipe 8 and flows back to the plate heat exchanger 6 through the seventh main pipe 9. Preferably, the terminal energy supply module 19 comprises a fan coil 20 connected with the plate heat exchanger 6 through the sixth main pipe 8 and the seventh main pipe 9, and cold release is performed through the fan coil 20. Preferably, the water filled in the sixth main pipe 8 and the seventh main pipe 9 is tap water doped with an algicide.

[0080] Through the above arrangement, the heat pump unit 4 can supply cold to the hydrate energy storage tank 17 to realize the cold storage of the hydrate cold storage working medium in the hydrate energy storage tank 17 in the cold storage stage. In the cold release stage, the hydrate cold storage working medium in the hydrate energy storage tank 17 and / or the heat pump unit 4 can supply cold to the plate heat exchanger 6 to realize the cold supply function of the terminal energy supply module 19.

[0081] In the heat storage stage, the heat pump unit 4 can supply heat to the hydrate energy storage tank 17 to realize the heat storage of the hydrate heat storage working medium in the hydrate energy storage tank 17. In the heat release stage, the hydrate heat storage working medium in the hydrate energy storage tank 17 and / or the heat pump unit 4 can supply heat to the plate heat exchanger 6 to realize the heat supply function of the terminal energy supply module 19.

[0082] The present application provides a complete cold / heat storage and release system in a pilot scale, and the volume of the hydrate energy storage tank 17 reaches 40m 3Theoretically, the maximum energy storage capacity is up to 2000 kWH. The host used is a multi-condition heat pump unit, and thanks to the advantages of the hydrate cold / heat storage material itself, the COP value reaches 5.5 in the hydrate cold storage mode, which has strong economy and energy saving. At the same time, in the heat storage mode, thanks to the high hydrate heat storage temperature, the system COP value is between 7-10. In summary, the present application is a pilot-scale hydrate energy storage central system, which fully utilizes the latent heat generated by the clathrate phase change, and realizes high-efficiency energy storage based on the reverse heat exchange strategy, so the present application has the advantages of high efficiency, energy saving and long-term stable operation, and is especially suitable for scenarios that continuously need cold and heat supply.

[0083] In another aspect of the present application, the present application realizes high-efficiency heat exchange between the hydrate cold / heat storage working medium in the hydrate energy storage tank 17 and the low-temperature cold carrier / heat carrier by the setting of the reverse heat exchange coil 18, so that the temperatures in different spaces in the hydrate energy storage tank 17 are basically consistent, thereby realizing more, more stable and more efficient energy storage of hydrate.

[0084] As a supplement to the technical scheme of the present application, the refrigeration / heat module further comprises a cold heat source 1, a cold heat source water pump set 3 and a fifth main pipeline 2. The cold heat source 1 is preferably sourced from geothermal energy, and can also be selected from air source, water source, solar energy and industrial waste liquid / gas source recycling, etc. The cold heat source 1 is connected with the heat pump unit 4 through the fifth main pipeline 2, and the cold heat source water pump set 3 is arranged on the fifth main pipeline 2. The cold heat source water pump set 3 is provided with at least two water pumps, which are arranged in parallel on the fifth main pipeline 2. When the cold heat source 1 is heat-exchanged by the heat pump unit, only one water pump is started during operation, and the remaining water pumps are standby water pumps. When the working cooling water pump fails, the standby water pump can be started in time to make the whole system operate normally. In addition, when high temperature or extremely cold weather occurs, the standby water pump can also be started at the same time to increase the water flow rate and improve the heat exchange efficiency and effect.

[0085] Preferably, the cold heat source water pump set 3 is provided with two water pumps, i.e. a first water pump and a second water pump, which are arranged in parallel on the fifth main pipeline 2.

[0086] As a supplement to the technical scheme of the present application, the energy storage module further comprises an internal circulation air flow disturbance module, which is arranged in the hydrate energy storage tank 17 and comprises an air pump 10 and a flow dividing device 11. The air pump 10 is arranged at the bottom of the hydrate energy storage tank 17, the top of the hydrate energy storage tank 17 is provided with an opening, the opening is connected with the air pump 10 through a pipeline, and the air pump 10 transports the air in the top space in the hydrate energy storage tank 17 to the flow dividing device 11.

[0087] The shunt device 11 is immersed in the hydrate storage / heat storage medium in the hydrate storage tank 17, and a containing space is arranged in the shunt device 11 for receiving the gas delivered by the gas pump 10. The surface of the shunt device 11 is provided with a gas outlet 12. The shunt device 11 is connected with the gas pump 10. The gas pump 10 delivers the gas at the top of the hydrate storage tank 17 through the shunt device 11, and then the gas is discharged from the gas outlet 12 of the shunt device 11. The gas forms bubbles in the hydrate storage / heat storage medium and floats up, which disturbs the hydrate and promotes the efficiency of the hydrate storage / heat storage medium. The bubbles are broken after floating to the surface of the hydrate, and then the bubbles are delivered into the shunt device 11 by the gas pump 10 again, so that the part of the gas is recycled. The gas outlet 12 is provided with a plurality of groups on the surface of the shunt device 11, so that a plurality of groups of bubbles are formed in the hydrate storage / heat storage medium, and the hydrate storage / heat storage medium is further disturbed.

[0088] According to the above technical scheme, the gas in the hydrate storage tank 17 is recycled and applied to the disturbance of the hydrate storage / heat storage medium, so that the energy storage efficiency of the hydrate storage / heat storage medium is improved. The temperature of the part of the gas is close to the temperature in the hydrate storage tank 17. Compared with the disturbance of the hydrate storage / heat storage medium by directly extracting the air outside by the gas pump 10, the air at the top of the hydrate storage tank 17 is recycled, which can reduce the heat exchange between the air and the hydrate storage / heat storage medium and reduce the energy loss. If the hot air outside is directly extracted, the hot air outside will take away part of the energy in the hydrate storage tank 17 when the hot air is discharged at the top of the hydrate storage tank 17, which reduces the hydrate storage / heat storage efficiency.

[0089] As a preferred technical scheme of the present application, the data acquisition module 13 is further included. The data acquisition module 13 includes a sensor group 15 arranged in the hydrate storage tank 17. The sensor group 15 includes a temperature sensor and a stress sensor. The temperature sensor and the stress sensor are arranged in the hydrate storage tank 17. The temperature sensor is used to acquire the temperature in the hydrate storage tank 17. The stress sensor is used to monitor the shape of the outer surface of the reverse heat exchange coil 18, specifically the deformation of the outer surface of the reverse heat exchange coil 18, and calculate the stress suffered by the reverse heat exchange coil 18.

[0090] Since the hydrate storage medium in the hydrate storage tank 17 will condense into a solid during the storage process, the surface of the reverse heat exchange coil 18 will freeze the hydrate during the heat exchange process, which will cause the stress of the reverse heat exchange coil 18. Therefore, the stress sensor is used to detect the shape of the outer surface of the reverse heat exchange coil 18.

[0091] As a preferred technical scheme of the present application, the system monitoring module 16 comprises an underwater camera and a searchlight, both of which are arranged in the hydrate energy storage tank 17 and used for monitoring the state of hydrate cold / heat storage working medium in the hydrate energy storage tank 17.

[0092] As a preferred technical scheme of the present application, the terminal cooling module further comprises a terminal water pump set 7 arranged on the sixth main pipeline 8 and used for conveying water in the sixth main pipeline 8. The terminal water pump set 7 comprises at least two water pumps, which are arranged in parallel. During operation, only one water pump is started, and the other water pumps are standby water pumps. When the working water pump fails, the standby water pump can be started in time to ensure normal operation of the whole system. In addition, when the fluid flow rate in the sixth main pipeline 8 is slow, the standby water pump can also be started to improve the conveying efficiency.

[0093] Preferably, the terminal water pump set 7 comprises three water pumps, i.e., a first water pump, a second water pump and a third water pump, which are arranged in parallel on the sixth main pipeline 8.

[0094] As a preferred technical scheme of the present application, the medium conveying pipe network comprises a first main pipeline 23, a second main pipeline 24, a pump set 5, a first electromagnetic valve 29 and a fifth electromagnetic valve 33.

[0095] The first end of the first main pipeline 23 is communicated with the heat pump unit 4, and the second end of the first main pipeline 23 is communicated with the reverse heat exchange coil 18.

[0096] The first end of the second main pipeline 24 is communicated with the reverse heat exchange coil 18, and the second end of the second main pipeline 24 is communicated with the heat pump unit 4.

[0097] The second main pipeline 24 is arranged on the second main pipeline 24.

[0098] During conveying of the cold / heat carrier by the heat pump unit 4 to the reverse heat exchange coil 18, the cold / heat carrier pump set 5 is started, the cold carrier is conveyed to the reverse heat exchange coil 18 through the first main pipeline 23, and after heat exchange with the hydrate in the hydrate energy storage tank 17, the cold carrier flows back to the heat pump unit 4 through the second main pipeline 24.

[0099] The specific connection mode of the reverse heat exchange coil and the medium conveying pipe network is that the first end of the first coil 21 is communicated with the first main pipeline 23, and the second end of the first coil 21 is communicated with the second main pipeline 24; the first end of the second coil 22 is communicated with the second main pipeline 24, and the second end of the second coil 22 is communicated with the first main pipeline 23. Through the above arrangement, the flow directions of the cold / heat carriers in the first coil 21 and the second coil 22 of the reverse heat exchange coil 18 are opposite.

[0100] The cold / heat carrier pump group 5 is provided with at least two water pumps, and each water pump is connected in parallel. Only one water pump is started during operation, and the other water pumps are standby pumps. When the working water pump fails, the standby water pump can be started in time to make the system run normally. In addition, when the fluid flow rate in the second main pipeline 24 is slow, the standby water pump can also be started at the same time to improve the conveying efficiency.

[0101] Preferably, the cold / heat source water pump group 3 is provided with two water pumps, namely a first water pump and a second water pump, which are connected in parallel on the second main pipeline 24.

[0102] The first electromagnetic valve 29 is arranged on the second main pipeline 24 and located between the cold / heat carrier pump group 5 and the first end of the second main pipeline 24, and is used for opening and closing the second main pipeline 24.

[0103] The fifth electromagnetic valve 33 is arranged on the first main pipeline 23 and is used for opening and closing the first main pipeline 23.

[0104] The medium conveying pipe network further comprises a third main pipeline 25, a fourth main pipeline 26, a first branch pipeline 27, a second electromagnetic valve 30, and a fourth electromagnetic valve 32.

[0105] The first end of the third main pipeline 25 is communicated with the plate heat exchanger 6, the second end of the third main pipeline 25 is communicated with the second main pipeline 24, and the position where the third main pipeline 25 is communicated with the second main pipeline 24 is located between the cold / heat carrier pump group 5 and the first electromagnetic valve 29.

[0106] The first end of the first branch pipeline 27 is communicated with the first main pipeline 23, and the position where the first branch pipeline 27 is communicated with the first main pipeline 23 is located between the first end of the first main pipeline 23 and the fifth electromagnetic valve 33. The second end of the first branch pipeline 27 is communicated with the second main pipeline 24, and the position where the first branch pipeline 27 is communicated with the second main pipeline 24 is located between the first electromagnetic valve 29 and the first end of the second main pipeline 24.

[0107] The fourth electromagnetic valve 32 is arranged on the first branch pipeline 27 and is used for opening and closing the first branch pipeline 27.

[0108] The first end of the fourth main pipeline 26 is communicated with the plate heat exchanger 6, the second end of the fourth main pipeline 26 is communicated with the first branch pipeline 27, and the position where the fourth main pipeline 26 is communicated with the first branch pipeline 27 is located between the fourth electromagnetic valve 32 and the second end of the first branch pipeline 27.

[0109] The second electromagnetic valve 30 is arranged on the fourth main pipeline 26 and is used for opening and closing the fourth main pipeline 26.

[0110] The medium conveying pipe network further comprises a second branch pipe 28 and a third electromagnetic valve 31

[0111] The first end of the second branch pipe 28 is in communication with the first main pipe 23, and the position where the first end of the second branch pipe 28 is in communication with the first main pipe 23 is located between the first end of the first main pipe 23 and the first end of the first branch pipe 27.

[0112] The second end of the second branch pipe 28 is in communication with the second main pipe 24, and the position where the second end of the second branch pipe 28 is in communication with the second main pipe 24 is located between the second end of the second main pipe 24 and the cold / heat carrier pump set 5.

[0113] As a preferred technical scheme of the present application, an automatic control module 14 is further included, which is connected with the refrigeration / heating module, the energy storage module, the heat exchange module, the terminal energy supply module 19, the medium conveying pipe network, the data acquisition module 13 and the system monitoring module 16, respectively.

[0114] Specifically, the automatic control module 14 is connected with the cold / heat source 1 in the refrigeration / heating module, the heat source water pump set 3, the heat pump set 4 in the refrigeration / heating module, the air pump 10 in the air flow disturbance module, the plate heat exchanger 6 in the heat exchange module, the cold / heat carrier pump set 5 in the medium conveying pipe network, the first electromagnetic valve 29, the second electromagnetic valve 30, the third electromagnetic valve 31, the fourth electromagnetic valve 32, the fifth electromagnetic valve 33, the terminal water pump set 7 in the terminal cooling supply module, the fan-coil 20 data acquisition module and the system monitoring module 16, respectively, for overall control of the whole system.

[0115] The automatic control module 14 comprises an industrial host, an operation liquid crystal screen, a control electric cabinet and a mechanical switch on the system, and has a four-level control method of a host computer and a slave computer. The host computer comprises industrial host automatic control and liquid crystal screen mouse control, and the slave computer comprises control electric cabinet operation panel control and mechanical switch manual control, so as to realize functions of automatic start and stop of the refrigeration machine, automatic switching of the operation mode, automatic detection of the system operation state, emergency alarm shutdown and automatic refrigeration temperature control.

[0116] The application further discloses a use method of the hydrate cold storage and heat storage air conditioning system based on the reverse heat exchange strategy.

[0117] Cold storage:

[0118] In the cold storage application scenario, the hydrate energy storage tank 17 should be filled with hydrate cold storage working medium. Figure 2 As shown in the figure, the first electromagnetic valve 29, the fifth electromagnetic valve 33, the air pump 10, the cold / heat carrier pump set 5, the heat pump set 4, the heat source water pump set 3 and the fan-coil 20 are turned on.

[0119] Close the second solenoid valve 30, the third solenoid valve 31, the fourth solenoid valve 32, the plate heat exchanger 6, and the terminal water pump group 7.

[0120] The cold and heat source water pump unit 3 delivers cold water from the cold and heat source 1 to the heat pump unit 4. The refrigerant in the medium water supply network undergoes heat exchange at the heat pump unit 4 to cool the refrigerant. Subsequently, the refrigerant is delivered to the reverse heat exchange coil 18 through the first main pipeline 23 via the refrigerant / heat carrier pump unit 5. The refrigerant undergoes heat exchange with the hydrate cold storage medium located in the hydrate energy storage tank 17 in the reverse heat exchange coil 18, and then flows back to the heat pump unit 4 through the second main pipeline 24.

[0121] During this process, the cold and heat source water pump group 3 works to transport cooling water between the heat pump unit 4 and the cold and heat source 1 to dissipate heat for the heat pump unit 4; the air pump 10 transports the gas at the top of the hydrate storage tank 17 to the diversion device 11, and the gas flows out from the air outlet 12 of the diversion device 11 to form bubbles, which disturb the hydrate in the hydrate storage tank 17 and improve the hydrate cold storage efficiency.

[0122] Hydrate storage tank 17 is cooled separately.

[0123] like Figure 3 As shown, the second solenoid valve 30, the third solenoid valve 31, the fourth solenoid valve 32, the fifth solenoid valve 33, the plate heat exchanger 6, the terminal water pump group 7, the refrigerant / heat carrier pump group 5, and the fan coil unit 20 are opened.

[0124] Close the first solenoid valve 29, heat pump unit 4, cold and heat source water pump unit 3, and air pump 10;

[0125] When the refrigerant / heat carrier pump unit 5 is turned on, the refrigerant in the reverse heat exchange coil 18 is sequentially transported to the plate heat exchanger 6 through the second main pipe 24, the first branch pipe 27, and the fourth main pipe 26. It exchanges heat with the water in the sixth main pipe 8. After the heat exchange is completed, the refrigerant flows into the second main pipe 24 through the third main pipe 25. At the second end of the second branch pipe 28, it splits into two streams of refrigerant. The first stream of refrigerant flows into the first main pipe 23 through the second branch pipe 28. The second stream of refrigerant flows into the heat pump unit 4 through the second main pipe 24, and then flows out of the heat pump unit 4 into the first main pipe 23. It merges with the first stream of refrigerant at the first end of the second branch pipe 28. The merged refrigerant then flows into the reverse heat exchange coil 18 through the first main pipe 23, completing one refrigerant cooling cycle.

[0126] When the terminal water pump unit 7 is working, it circulates the water in the sixth main pipeline 8 and the seventh main pipeline 9 between the plate heat exchanger 6 and the terminal power supply module 19. The water is cooled in the plate heat exchanger 6 and cooled at the fan coil unit 20 in the terminal power supply module 19.

[0127] During the above process, the opening degrees of the fourth solenoid valve 32 and the fifth solenoid valve 33 are adjusted to regulate the temperature of the refrigerant returning to the reverse heat exchange coil 18 after heat exchange is completed. Specifically, the low-temperature refrigerant that has not completed heat exchange flowing out of the reverse heat exchange coil 18 through the second main pipe 24 and the high-temperature refrigerant that has completed heat exchange flowing into the reverse heat exchange coil through the first main pipe 23 cross-flow in the first branch pipe 27, and the two streams of refrigerant exchange heat. When it is necessary to lower the temperature of the refrigerant returning to the reverse heat exchange coil 18, the opening degree of the fourth solenoid valve 32 is increased and the opening degree of the fifth solenoid valve 33 is decreased to improve the cross-heat exchange effect. When it is necessary to raise the temperature of the refrigerant returning to the reverse heat exchange coil 18, the opening degree of the fourth solenoid valve 32 is decreased and the opening degree of the fifth solenoid valve 33 is increased to reduce the cross-heat exchange effect.

[0128] In this mode, the cold source of this device comes entirely from the hydrate storage tank 17. The advantage is that the cold storage mode can be turned on during the night when electricity costs are low, so as to store the cold energy and reduce the cost of use.

[0129] Heat pump unit 4 provides independent cooling:

[0130] like Figure 4 As shown, the second solenoid valve 30, the fourth solenoid valve 32, the cold and heat source water pump group 3, the heat pump unit 4, the refrigerant / heat carrier pump group 5, the plate heat exchanger 6, the terminal water pump group 7, and the fan coil unit 20 are opened.

[0131] Close the first solenoid valve 29, the third solenoid valve 31, the fifth solenoid valve 33, and the air pump 10;

[0132] The cold and heat source water pump unit 3 delivers cold water from the cold and heat source 1 to the heat pump unit 4. The refrigerant in the medium water supply network undergoes heat exchange at the heat pump unit 4, providing cooling for the refrigerant. Subsequently, the refrigerant is driven by the refrigerant / heat carrier pump unit 5 to flow through the first main pipe 23 and into the first branch pipe 27 at the first end. Then, it flows through the first branch pipe 27 and the fourth main pipe 26 in sequence, into the plate heat exchanger 6, where it exchanges heat with the water in the sixth main pipe 8. After completing the heat exchange, the refrigerant flows through the third main pipe 25 into the second main pipe 24, and then returns to the heat pump unit 4 through the second main pipe 24, completing the cooling cycle. When the terminal water pump unit 7 is working, it circulates the cooling water in the sixth main pipeline 8 and the seventh main pipeline 9 between the plate heat exchanger 6 and the terminal power supply module 19. The cooling water is cooled in the plate heat exchanger 6 and released at the fan coil unit 20 in the terminal power supply module 19.

[0133] During the above process, the cold and heat source water pump unit 3 works to deliver cooling water and circulate it between the heat pump unit 4 and the cold and heat source 1 to dissipate heat for the heat pump unit 4.

[0134] This mode is suitable for emergency scenarios, i.e. the application scenario in which the hydrate in the hydrate energy storage tank 17 does not store cold energy, and only the heat pump unit 4 is used for refrigeration.

[0135] Hydrate energy storage tank 17 and heat pump unit 4 combined cooling:

[0136] As shown in FIG. 6, the second electromagnetic valve 30, the fourth electromagnetic valve 32, the fifth electromagnetic valve 33, the cold and heat source water pump group 3, the heat pump unit 4, the carrier fluid / heat carrier pump group 5, the plate heat exchanger 6, the terminal water pump group 7, the air pump 10, and the fan coil 20 are opened. Figure 5

[0137] The first electromagnetic valve 29 and the third electromagnetic valve 31 are closed.

[0138] The cold and heat source water pump group 3 transports the cold water at the cold and heat source 1 to the heat pump unit 4, and the carrier fluid in the medium water pipe network is heat-exchanged at the heat pump unit 4 to perform primary cooling on the carrier fluid. Subsequently, the carrier fluid in the heat pump unit 4 is transported by the carrier fluid / heat carrier pump group 5 to the reverse heat exchange coil 18 through the first main pipe 23, the hydrate in the hydrate energy storage tank 17 performs secondary cooling on the carrier fluid flowing into the reverse heat exchange coil 18, and then the carrier fluid is sequentially transported to the plate heat exchanger 6 through the second main pipe 24, the first branch pipe 27, and the fourth main pipe 26, and is heat-exchanged with the water arranged in the sixth main pipe 8. The carrier fluid after heat exchange flows into the second main pipe 24 through the third main pipe 25, and flows back to the heat pump unit 4 through the second main pipe 24 to complete a carrier fluid cooling cycle.

[0139] The terminal water pump group 7 circulates the cooling water in the sixth main pipe 8 and the seventh main pipe 9 between the plate heat exchanger 6 and the terminal energy supply module 19, the cooling water takes cold in the plate heat exchanger 6, and releases cold at the fan coil 20 in the terminal energy supply module 19.

[0140] In the above process, the opening degrees of the fourth electromagnetic valve 32 and the fifth electromagnetic valve 33 are adjusted to adjust the temperature of the carrier fluid flowing into the reverse heat exchange coil 18. Specifically, the low-temperature carrier fluid that has not completed heat exchange and flows out of the reverse heat exchange coil 18 through the second main pipe 24 and the high-temperature carrier fluid that has only been subjected to primary cooling by the heat pump unit 4 and flows into the reverse heat exchange coil through the first main pipe 23 cross-flow in the first branch pipe 27, and the two carrier fluids are heat-exchanged. When it is necessary to lower the temperature of the carrier fluid flowing back to the reverse heat exchange coil 18, the opening degree of the fourth electromagnetic valve 32 is increased, and the opening degree of the fifth electromagnetic valve 33 is decreased to improve the cross heat exchange effect. When it is necessary to increase the temperature of the carrier fluid flowing back to the reverse heat exchange coil 18, the opening degree of the fourth electromagnetic valve 32 is decreased, and the opening degree of the fifth electromagnetic valve 33 is increased to reduce the cross heat exchange effect.

[0141] ​In this mode, the cold source of the device comes from both the heat pump unit 4 and the hydrate energy storage tank 17, and the cooling time is longer than when the hydrate energy storage tank 17 is used alone.

[0142] Heat storage:

[0143] In the heat storage application scenario, the hydrate energy storage tank 17 should be filled with hydrate heat storage working medium. As shown in Figure 2 the first electromagnetic valve 29, the fifth electromagnetic valve 33, the air pump 10, the heat carrier pump group 5, the heat pump unit 4, the cold and heat source water pump group 3, and the fan coil 20 are opened;

[0144] the second electromagnetic valve 30, the third electromagnetic valve 31, the fourth electromagnetic valve 32, the plate heat exchanger 6, and the terminal water pump group 7 are closed;

[0145] The cold and heat source water pump group 3 transports hot water at the cold and heat source 1 to the heat pump unit 4, and the heat carrier in the medium water pipe network exchanges heat at the heat pump unit 4 to heat the heat carrier, which is then transported to the reverse heat exchange coil 18 through the first main pipe 23 by the heat carrier pump group 5, and the heat carrier exchanges heat with the hydrate heat storage working medium in the hydrate energy storage tank 17 in the reverse heat exchange coil 18, and then returns to the heat pump unit 4 through the second main pipe 24;

[0146] In this process, the cold and heat source water pump group 3 works to transport water between the heat pump unit 4 and the cold and heat source 1 to heat the heat pump unit 4; the air pump 10 transports the gas at the top of the hydrate energy storage tank 17 to the shunt device 11, the gas flows out of the gas outlet 12 of the shunt device 11 to form bubbles, which disturb the hydrate heat storage working medium in the hydrate energy storage tank 17 and improve the hydrate heat storage efficiency.

[0147] Hydrate energy storage tank 17 heating alone:

[0148] As shown in Figure 3 the second electromagnetic valve 30, the third electromagnetic valve 31, the fourth electromagnetic valve 32, the fifth electromagnetic valve 33, the plate heat exchanger 6, the terminal water pump group 7, the heat carrier pump group 5, and the fan coil 20 are opened;

[0149] the first electromagnetic valve 29, the heat pump unit 4, the cold and heat source water pump group 3, and the air pump 10 are closed;

[0150] When the refrigerant / heat carrier pump unit 5 is turned on, the heat carrier in the reverse heat exchange coil 18 is sequentially transported to the plate heat exchanger 6 through the second main pipe 24, the first branch pipe 27, and the fourth main pipe 26. It exchanges heat with the water in the sixth main pipe 8. After the heat exchange is completed, the heat carrier flows into the second main pipe 24 through the third main pipe 25. At the second end of the second branch pipe 28, it splits into two heat carrier streams. The first heat carrier flows into the first main pipe 23 through the second branch pipe 28. The second heat carrier flows into the heat pump unit 4 through the second main pipe 24, and then flows out of the heat pump unit 4 into the first main pipe 23. It merges with the first heat carrier at the first end of the second branch pipe 28. The merged heat carrier flows into the reverse heat exchange coil 18 through the first main pipe 23, completing one heat carrier heating cycle. When the terminal water pump unit 7 is working, it circulates the water in the sixth main pipeline 8 and the seventh main pipeline 9 between the plate heat exchanger 6 and the terminal power supply module 19. The water takes heat in the plate heat exchanger 6 and releases heat at the fan coil unit 20 in the terminal power supply module 19.

[0151] During the above process, the opening degrees of the fourth solenoid valve 32 and the fifth solenoid valve 33 are adjusted to regulate the temperature of the heat carrier returning to the reverse heat exchange coil 18 after heat exchange is completed. Specifically, the high-temperature heat carrier that has not completed heat exchange flowing out of the reverse heat exchange coil 18 through the second main pipe 24 and the low-temperature heat carrier that has completed heat exchange flowing into the reverse heat exchange coil through the first main pipe 23 cross-flow in the first branch pipe 27, and the two heat carriers exchange heat. When it is necessary to increase the temperature of the heat carrier returning to the reverse heat exchange coil 18, the opening degree of the fourth solenoid valve 32 is increased and the opening degree of the fifth solenoid valve 33 is decreased to improve the cross-heat exchange effect. When it is necessary to decrease the temperature of the heat carrier returning to the reverse heat exchange coil 18, the opening degree of the fourth solenoid valve 32 is decreased and the opening degree of the fifth solenoid valve 33 is increased to reduce the cross-heat exchange effect.

[0152] In this mode, the heat source of this device comes entirely from the hydrate storage tank 17. The advantage is that the heat storage mode can be turned on during the night when electricity costs are low, so as to store heat and reduce the cost of use.

[0153] Heat pump unit 4 provides independent heating:

[0154] like Figure 4 As shown, the second solenoid valve 30, the fourth solenoid valve 32, the cold and heat source water pump group 3, the heat pump unit 4, the refrigerant / heat carrier pump group 5, the plate heat exchanger 6, the terminal water pump group 7, and the fan coil unit 20 are opened.

[0155] Close the first solenoid valve 29, the third solenoid valve 31, the fifth solenoid valve 33, and the air pump 10;

[0156] The cold and heat source water pump unit 3 delivers hot water from the cold and heat source 1 to the heat pump unit 4. The heat carrier in the medium water supply network undergoes heat exchange at the heat pump unit 4 to supply heat to the heat carrier. Subsequently, driven by the refrigerant / heat carrier pump unit 5, the heat carrier flows through the first main pipeline 23 and into the first branch pipeline 27 at the first end of the first branch pipeline 27. Then, it flows through the first branch pipeline 27 and the fourth main pipeline 26 in sequence and flows into the plate heat exchanger 6 to exchange heat with the water in the sixth main pipeline 8. After completing the heat exchange, the heat carrier flows through the third main pipeline 25 into the second main pipeline 24 and then flows back to the heat pump unit 4 through the second main pipeline 24, completing one heat carrier heating cycle. When the terminal water pump unit 7 is working, it circulates the water in the sixth main pipeline 8 and the seventh main pipeline 9 between the plate heat exchanger 6 and the terminal power supply module 19. The water takes heat in the plate heat exchanger 6 and releases heat at the fan coil unit 20 in the terminal power supply module 19.

[0157] During the above process, the cold and heat source water pump unit 3 works to transport cooling water and circulate it between the heat pump unit 4 and the cold and heat source 1 to provide heat for the heat pump unit 4.

[0158] This mode is suitable for emergency scenarios, i.e., when the hydrate in the hydrate storage tank 17 does not store heat, and only the heat pump unit 4 is used for heating.

[0159] Combined heating system using heat pump unit 4 and hydrate storage tank 17:

[0160] like Figure 5 As shown, the second solenoid valve 30, the fourth solenoid valve 32, the fifth solenoid valve 33, the cold and heat source water pump group 3, the heat pump unit 4, the refrigerant / heat carrier pump group 5, the plate heat exchanger 6, the terminal water pump group 7, the air pump 10, and the fan coil unit 20 are opened.

[0161] Close the first solenoid valve 29 and the third solenoid valve 31;

[0162] The cold and heat source water pump unit 3 transports hot water from the cold and heat source 1 to the heat pump unit 4. The heat carrier in the medium water supply network undergoes heat exchange at the heat pump unit 4, providing initial heating to the heat carrier. Subsequently, the heat carrier in the heat pump unit 4 is transported to the reverse heat exchange coil 18 through the first main pipeline 23 via the refrigerant / heat carrier pump unit 5. The hydrate heat storage medium in the hydrate energy storage tank 17 provides further heating to the heat carrier flowing into the reverse heat exchange coil 18. Then, it is transported sequentially through the second main pipeline 24, the first branch pipeline 27, and the fourth main pipeline 26 to the plate heat exchanger 6, where it exchanges heat with the water in the sixth main pipeline 8. After heat exchange, the heat carrier flows into the second main pipeline 24 through the third main pipeline 25 and returns to the heat pump unit 4 through the second main pipeline 24, completing one heat carrier heating cycle.

[0163] The end water pump group 7 works, and the water in the sixth main pipeline 8 and the seventh main pipeline 9 is circulated between the plate heat exchanger 6 and the end energy supply module 19. The water takes heat in the plate heat exchanger 6 and releases heat at the fan coil 20 in the end energy supply module 19.

[0164] In the above process, the opening degrees of the fourth electromagnetic valve 32 and the fifth electromagnetic valve 33 are adjusted to adjust the temperature of the heat carrier flowing into the reverse heat exchange coil 18. Specifically, the high-temperature heat carrier that has not completed heat exchange flowing out of the reverse heat exchange coil 18 through the second main pipeline 24 and the low-temperature heat carrier that has only been initially heated by the heat pump unit 4 flowing into the reverse heat exchange coil through the first main pipeline 23 cross and flow in the first branch pipeline 27, and the two heat carriers exchange heat. When it is necessary to increase the temperature of the heat carrier flowing back to the reverse heat exchange coil 18, the opening degree of the fourth electromagnetic valve 32 is increased, and the opening degree of the fifth electromagnetic valve 33 is decreased to increase the cross heat exchange effect. When it is necessary to decrease the temperature of the heat carrier flowing back to the reverse heat exchange coil 18, the opening degree of the fourth electromagnetic valve 32 is decreased, and the opening degree of the fifth electromagnetic valve 33 is increased to decrease the cross heat exchange effect.

[0165] In this mode, the heat source of the device comes from the heat pump unit 4 and the hydrate energy storage tank 17 at the same time, and the heat release time is more durable than when only the hydrate energy storage tank 17 is used.

[0166] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the disclosed technical scope, which should be covered by the protection scope of the present application.

Claims

1. A hydrate-based cold / heat storage air conditioning system based on a reverse heat exchange strategy, characterized in that, Includes cooling / heating modules, energy storage modules, heat exchange modules, terminal energy supply modules (19), and media transport pipelines. The cooling / heating module includes a cold and heat source (1), a cold and heat source water pump group (3), a fifth main pipeline (2), and a heat pump unit (4). The cold and heat source (1) and the heat pump unit (4) are connected through the fifth main pipeline (2), and the cold and heat source water pump group (3) is installed on the fifth main pipeline (2). The energy storage module includes a hydrate energy storage tank (17), a reverse heat exchange coil (18), and a hydrate cold / heat storage medium. The reverse heat exchange coil (18) and the hydrate cold / heat storage medium are both installed in the hydrate energy storage tank (17). The heat pump unit (4) is connected to the reverse heat exchange coil (18) installed in the hydrate energy storage tank (17) through a medium transport pipeline. The medium transport pipeline is provided with a refrigerant / heat carrier. The reverse heat exchange coil (18) includes a first coil (21) and a second coil (22) with the same shape and length. The first coil (21) and the second coil (22) are arranged adjacent to each other. The distance between the first coil (21) and the second coil (22) is always the same along the extension direction of the two coils. The first coil (21) and the second coil (22) are respectively connected to the medium transport pipeline. The fluid flow direction in the two coils is opposite. The heat exchange module includes a plate heat exchanger (6), one end of which is connected to the heat pump unit (4) and the reverse heat exchange coil (18) through a medium conveying pipeline, and the other end is connected to the terminal energy supply module (19). The terminal power supply module (19) includes a heat dissipation device, a sixth main pipeline (8), and a seventh main pipeline (9). The first end of the sixth main pipeline (8) is connected to the plate heat exchanger (6), and the second end of the sixth main pipeline (8) is connected to the heat dissipation device. The first end of the seventh main pipeline (9) is connected to the plate heat exchanger (6), and the second end of the seventh main pipeline (9) is connected to the heat dissipation device. The media transport network includes a first main pipeline (23), a second main pipeline (24), a third main pipeline (25), a fourth main pipeline (26), a first branch pipeline (27), a second branch pipeline (28), a refrigerant / heat carrier pump group (5), a first solenoid valve (29), a second solenoid valve (30), a third solenoid valve (31), a fourth solenoid valve (32), and a fifth solenoid valve (33). The first end of the first main pipeline (23) is connected to the heat pump unit (4), and the second end of the first main pipeline (23) is connected to the reverse heat exchange coil (18); the first end of the second main pipeline (24) is connected to the reverse heat exchange coil (18), and the second end of the second main pipeline (24) is connected to the heat pump unit (4); the refrigerant / heat carrier pump unit (5) is installed on the second main pipeline (24); the first solenoid valve (29) is installed on the second main pipeline (24) and is located between the refrigerant / heat carrier pump unit (5) and the first end of the second main pipeline (24); the fifth solenoid valve (33) is installed on the first main pipeline (23); The first end of the third main pipe (25) is connected to the plate heat exchanger (6), and the second end of the third main pipe (25) is connected to the second main pipe (24). The connection between the third main pipe (25) and the second main pipe (24) is located between the refrigerant / heat carrier pump group (5) and the first solenoid valve (29). The first end of the first branch pipe (27) is connected to the first main pipe (23), and the connection between the first branch pipe (27) and the first main pipe (23) is located between the fifth solenoid valve (33) and the first end of the first main pipe (23). The second end of the first branch pipe (27) is connected to the second main pipe (24). The first branch pipe (27) and the second main pipe (24) are connected at a position between the first solenoid valve (29) and the first end of the second main pipe (24); the fourth solenoid valve (32) is installed on the first branch pipe (27); the first end of the fourth main pipe (26) is connected to the plate heat exchanger (6), the second end of the fourth main pipe (26) is connected to the first branch pipe (27), and the connection position between the fourth main pipe (26) and the first branch pipe (27) is located between the fourth solenoid valve (32) and the second end of the first branch pipe (27); the second solenoid valve (30) is installed on the fourth main pipe (26); The first end of the second branch pipe (28) is connected to the first main pipe (23), and the position where the first end of the second branch pipe (28) is connected to the first main pipe (23) is between the first end of the first main pipe (23) and the first end of the first branch pipe (27); the second end of the second branch pipe (28) is connected to the second main pipe (24), and the position where the second end of the second branch pipe (28) is connected to the second main pipe (24) is between the second end of the second main pipe (24) and the refrigerant / heat carrier pump group (5).

2. The hydrate-based cold / heat storage air conditioning system based on a reverse heat exchange strategy according to claim 1, characterized in that, The cold and heat source water pump group (3) is equipped with at least two water pumps, which are connected in parallel on the fifth main pipeline (2).

3. The hydrate-based cold / heat storage air conditioning system based on a reverse heat exchange strategy according to claim 1, characterized in that, The energy storage module also includes an internal circulation airflow disturbance module, which is set inside the hydrate energy storage tank (17) and includes an air pump (10) and a diversion device (11). The air pump (10) is set at the bottom of the hydrate energy storage tank (17), and the top of the hydrate energy storage tank (17) is provided with an opening. The opening is connected to the air pump (10) through a pipeline. The air pump (10) delivers the air in the top space inside the hydrate energy storage tank (17) to the diversion device (11). The diversion device (11) is immersed in the hydrate cooling / heat storage medium in the hydrate energy storage tank (17). The diversion device (11) has a receiving space for receiving the gas delivered by the gas pump (10). The surface of the diversion device (11) has an outlet (12).

4. The hydrate-based cold / heat storage air conditioning system based on a reverse heat exchange strategy according to claim 1, characterized in that, It also includes a data acquisition module (13), which includes a sensor group (15) set in the hydrate storage tank (17). The sensor group (15) includes a temperature sensor and a stress sensor. The temperature sensor is used to collect the temperature in the hydrate storage tank (17), and the stress sensor monitors the outer surface shape of the reverse heat exchange coil (18).

5. The hydrate-based cold / heat storage air conditioning system based on a reverse heat exchange strategy according to claim 4, characterized in that, It also includes a system monitoring module (16), which includes an underwater camera and a searchlight. The underwater camera and searchlight are both installed in the hydrate storage tank (17) to monitor the status of the hydrate cold / heat storage medium in the hydrate storage tank (17).

6. The hydrate-based cold / heat storage air conditioning system based on a reverse heat exchange strategy according to claim 5, characterized in that, It also includes an automatic control module (14), which is connected to the cooling / heating module, the energy storage module, the heat exchange module, the terminal energy supply module (19), the medium transport pipeline, the data acquisition module (13), and the system monitoring module (16), respectively.

7. The hydrate-based cold / heat storage air conditioning system based on a reverse heat exchange strategy according to claim 1, characterized in that, The end power supply module also includes an end water pump group (7), which is installed on the sixth main pipeline (8). The end water pump group (7) has at least two water pumps connected in parallel.

8. The method of using the hydrate cold / heat storage air conditioning system based on the reverse heat exchange strategy according to claim 1, characterized in that, include: Cold storage: In this mode, the hydrate storage tank (17) should be equipped with hydrate cold storage medium, and the medium water supply network should be equipped with a coolant; open the first solenoid valve (29), the fifth solenoid valve (33), the coolant / heat carrier pump group (5), the cold and heat source water pump group (3), and the heat pump unit (4); close the second solenoid valve (30), the third solenoid valve (31), the fourth solenoid valve (32), and the plate heat exchanger (6). The cold and heat source water pump group (3) transports cold water from the cold and heat source (1) to the heat pump unit (4). The refrigerant in the medium water supply network undergoes heat exchange at the heat pump unit (4) to supply cooling to the refrigerant. Subsequently, the refrigerant is transported to the reverse heat exchange coil (18) through the first main pipeline (23) via the refrigerant / heat carrier pump group (5). The refrigerant undergoes heat exchange with the hydrate cold storage medium located in the hydrate energy storage tank (17) in the reverse heat exchange coil (18), and then flows back to the heat pump unit (4) through the second main pipeline (24). Hydrate storage tank (17) is cooled separately: Open the second solenoid valve (30), the third solenoid valve (31), the fourth solenoid valve (32), the fifth solenoid valve (33), the plate heat exchanger (6), and the refrigerant / heat carrier pump group (5); close the first solenoid valve (29), the cold and heat source water pump group (3), and the heat pump unit (4). The refrigerant / heat carrier pump unit (5) is turned on to transport the refrigerant in the reverse heat exchange coil (18) to the plate heat exchanger (6) through the second main pipeline (24), the first branch pipeline (27), and the fourth main pipeline (26) in sequence. The refrigerant then exchanges heat with the water in the sixth main pipeline (8). After the heat exchange is completed, the refrigerant flows into the second main pipeline (24) through the third main pipeline (25) and splits into two streams of refrigerant at the second end of the second branch pipeline (28). The first stream of refrigerant flows into the first main pipeline (23) through the second branch pipeline (28); the second stream of refrigerant flows into the heat pump unit (4) through the second main pipeline (24), and then flows out from the heat pump unit (4) into the first main pipeline (23), where it merges with the first stream of refrigerant at the first end of the second branch pipeline (28). The merged refrigerant then flows into the reverse heat exchange coil (18) through the first main pipeline (23), completing one refrigerant cooling cycle. The water in the sixth main pipeline (8) and the seventh main pipeline (9) circulates between the plate heat exchanger (6) and the terminal power supply module (19). The water is cooled in the plate heat exchanger (6) and cooled at the terminal power supply module (19). During the above process, the opening of the fourth solenoid valve (32) and the fifth solenoid valve (33) are adjusted to adjust the temperature of the refrigerant returning to the reverse heat exchange coil (18) after heat exchange is completed; when it is necessary to lower the temperature of the refrigerant returning to the reverse heat exchange coil (18), the opening of the fourth solenoid valve (32) is increased and the opening of the fifth solenoid valve (33) is decreased; when it is necessary to raise the temperature of the refrigerant returning to the reverse heat exchange coil (18), the opening of the fourth solenoid valve (32) is decreased and the opening of the fifth solenoid valve (33) is increased. Heat pump unit (4) provides cooling independently: Open the second solenoid valve (30), the fourth solenoid valve (32), the cold and heat source water pump group (3), the heat pump unit (4), the refrigerant / heat carrier pump group (5), and the plate heat exchanger (6); close the first solenoid valve (29), the third solenoid valve (31), and the fifth solenoid valve (33). The cold and heat source water pump group (3) delivers cold water from the cold and heat source (1) to the heat pump unit (4). The refrigerant in the medium water supply network undergoes heat exchange at the heat pump unit (4) to supply cooling to the refrigerant. Subsequently, the refrigerant flows through the first main pipeline (23) driven by the refrigerant / heat carrier pump group (5), and flows into the first branch pipeline (27) at the first end of the first branch pipeline (27). Then, it flows through the first branch pipeline (27) and the fourth main pipeline (26) in sequence to the plate heat exchanger (6) to exchange heat with the water in the sixth main pipeline (8). After the heat exchange is completed, the refrigerant flows through the third main pipeline (25) into the second main pipeline (24) and then flows back to the heat pump unit (4) through the second main pipeline (24) to complete a refrigerant cooling cycle. The cooling water in the sixth main pipeline (8) and the seventh main pipeline (9) circulates between the plate heat exchanger (6) and the terminal power supply module (19). The cooling water is cooled in the plate heat exchanger (6) and cooled at the terminal power supply module (19). Combined cooling system consisting of heat pump unit (4) and hydrate storage tank (17): Open the second solenoid valve (30), the fourth solenoid valve (32), the fifth solenoid valve (33), the cold and heat source water pump group (3), the heat pump unit (4), the refrigerant / heat carrier pump group (5), and the plate heat exchanger (6); close the first solenoid valve (29) and the third solenoid valve (31). The cold and heat source water pump group (3) transports cold water from the cold and heat source (1) to the heat pump unit (4). The refrigerant in the medium water supply network undergoes heat exchange at the heat pump unit (4) to provide initial cooling. Subsequently, the refrigerant in the heat pump unit (4) is transported through the first main pipeline (23) to the reverse heat exchange coil (18) via the refrigerant / heat carrier pump group (5). The hydrate in the hydrate storage tank (17) flows into the reverse heat exchange coil (18). The refrigerant in 18) is cooled again, and then transported to the plate heat exchanger (6) in sequence through the second main pipeline (24), the first branch pipeline (27), and the fourth main pipeline (26) to exchange heat with the water in the sixth main pipeline (8). After the heat exchange is completed, the refrigerant flows into the second main pipeline (24) through the third main pipeline (25), and then flows back to the heat pump unit (4) through the second main pipeline (24) to complete the refrigerant cooling cycle. The cooling water in the sixth main pipeline (8) and the seventh main pipeline (9) circulates between the plate heat exchanger (6) and the terminal power supply module (19). The cooling water is cooled in the plate heat exchanger (6) and cooled at the terminal power supply module (19). During the above process, the opening of the fourth solenoid valve (32) and the fifth solenoid valve (33) are adjusted to adjust the temperature of the refrigerant flowing into the reverse heat exchange coil (18); when it is necessary to lower the temperature of the refrigerant flowing back to the reverse heat exchange coil (18), the opening of the fourth solenoid valve (32) is increased and the opening of the fifth solenoid valve (33) is decreased; when it is necessary to raise the temperature of the refrigerant flowing back to the reverse heat exchange coil (18), the opening of the fourth solenoid valve (32) is decreased and the opening of the fifth solenoid valve (33) is increased.

9. The method of using the hydrate cold / heat storage air conditioning system based on the reverse heat exchange strategy according to claim 8, characterized in that, Also includes: Heat storage: In this mode, the hydrate storage tank (17) should be equipped with hydrate heat storage medium, and the medium water supply network should be equipped with heat carrier; open the first solenoid valve (29), the fifth solenoid valve (33), the refrigerant / heat carrier pump group (5), the cold and heat source water pump group (3), and the heat pump unit (4); close the second solenoid valve (30), the third solenoid valve (31), the fourth solenoid valve (32), and the plate heat exchanger (6). The cold and heat source water pump group (3) transports hot water from the cold and heat source (1) to the heat pump unit (4). The heat carrier in the medium water supply network undergoes heat exchange at the heat pump unit (4) to supply heat to the heat carrier. Then, the heat carrier is transported to the reverse heat exchange coil (18) through the first main pipeline (23) via the refrigerant / heat carrier pump group (5). The heat carrier undergoes heat exchange with the hydrate heat storage medium located in the hydrate energy storage tank (17) in the reverse heat exchange coil (18), and then flows back to the heat pump unit (4) through the second main pipeline (24). Hydrate storage tank (17) is heated separately: Open the second solenoid valve (30), the third solenoid valve (31), the fourth solenoid valve (32), the fifth solenoid valve (33), the plate heat exchanger (6), and the refrigerant / heat carrier pump group (5); close the first solenoid valve (29), the cold and heat source water pump group (3), and the heat pump unit (4). The refrigerant / heat carrier pump unit (5) is turned on to transport the heat carrier in the reverse heat exchange coil (18) to the plate heat exchanger (6) through the second main pipeline (24), the first branch pipeline (27), and the fourth main pipeline (26) in sequence. The heat carrier exchanges heat with the water in the sixth main pipeline (8). After the heat exchange is completed, the heat carrier flows into the second main pipeline (24) through the third main pipeline (25). At the second end of the second branch pipeline (28), the heat carrier is split into two streams. The first heat carrier flows into the first main pipeline (23) through the second branch pipeline (28); the second heat carrier flows into the heat pump unit (4) through the second main pipeline (24), and then flows out from the heat pump unit (4) into the first main pipeline (23), where it merges with the first heat carrier at the first end of the second branch pipeline (28). The merged heat carrier then flows into the reverse heat exchange coil (18) through the first main pipeline (23), completing the heat carrier heating cycle. The water in the sixth main pipeline (8) and the seventh main pipeline (9) circulates between the plate heat exchanger (6) and the terminal power supply module (19). The water takes heat in the plate heat exchanger (6) and releases heat at the terminal power supply module (19). During the above process, the opening of the fourth solenoid valve (32) and the fifth solenoid valve (33) are adjusted to adjust the temperature of the heat carrier that returns to the reverse heat exchange coil (18) after heat exchange is completed; when it is necessary to increase the temperature of the heat carrier that returns to the reverse heat exchange coil (18), the opening of the fourth solenoid valve (32) is increased and the opening of the fifth solenoid valve (33) is decreased; when it is necessary to decrease the temperature of the heat carrier that returns to the reverse heat exchange coil (18), the opening of the fourth solenoid valve (32) is decreased and the opening of the fifth solenoid valve (33) is increased. Heat pump unit (4) provides heating independently: Open the second solenoid valve (30), the fourth solenoid valve (32), the cold and heat source water pump group (3), the heat pump unit (4), the refrigerant / heat carrier pump group (5), and the plate heat exchanger (6); close the first solenoid valve (29), the third solenoid valve (31), and the fifth solenoid valve (33). The cold and heat source water pump group (3) delivers hot water from the cold and heat source (1) to the heat pump unit (4). The heat carrier in the medium water supply network undergoes heat exchange at the heat pump unit (4) to heat the heat carrier. Then, the heat carrier is driven by the refrigerant / heat carrier pump group (5) through the first main pipeline (23) and flows into the first branch pipeline (27) at the first end of the first branch pipeline (27). Then, it flows into the plate heat exchanger (6) through the first branch pipeline (27) and the fourth main pipeline (26) in sequence, and exchanges heat with the water in the sixth main pipeline (8). After the heat exchange is completed, the heat carrier flows into the second main pipeline (24) through the third main pipeline (25) and flows back to the heat pump unit (4) through the second main pipeline (24) to complete one heat carrier heating cycle. The water in the sixth main pipeline (8) and the seventh main pipeline (9) circulates between the plate heat exchanger (6) and the terminal power supply module (19). The water takes heat in the plate heat exchanger (6) and releases heat at the terminal power supply module (19). Combined heating of heat pump unit (4) and hydrate storage tank (17): Open the second solenoid valve (30), the fourth solenoid valve (32), the fifth solenoid valve (33), the cold and heat source water pump group (3), the heat pump unit (4), the refrigerant / heat carrier pump group (5), and the plate heat exchanger (6); close the first solenoid valve (29) and the third solenoid valve (31). The cold and heat source water pump group (3) transports hot water from the cold and heat source (1) to the heat pump unit (4). The heat carrier in the medium water supply network undergoes heat exchange at the heat pump unit (4) to provide initial heating to the heat carrier. Subsequently, the heat carrier in the heat pump unit (4) is transported through the first main pipeline (23) to the reverse heat exchange coil (18) via the refrigerant / heat carrier pump group (5). The hydrate in the hydrate storage tank (17) flows into the reverse heat exchange coil (18). The heat carrier in 8) is reheated and then transported to the plate heat exchanger (6) in sequence through the second main pipeline (24), the first branch pipeline (27), and the fourth main pipeline (26), where it exchanges heat with the water in the sixth main pipeline (8). After the heat exchange is completed, the heat carrier flows into the second main pipeline (24) through the third main pipeline (25) and then flows back to the heat pump unit (4) through the second main pipeline (24), completing one heat carrier heating cycle. The water in the sixth main pipeline (8) and the seventh main pipeline (9) circulates between the plate heat exchanger (6) and the terminal power supply module (19). The water takes heat in the plate heat exchanger (6) and releases heat at the terminal power supply module (19). During the above process, the opening of the fourth solenoid valve (32) and the fifth solenoid valve (33) are adjusted to adjust the temperature of the heat carrier flowing into the reverse heat exchange coil (18); when it is necessary to increase the temperature of the heat carrier flowing back to the reverse heat exchange coil (18), the opening of the fourth solenoid valve (32) is increased and the opening of the fifth solenoid valve (33) is decreased; when it is necessary to decrease the temperature of the heat carrier flowing back to the reverse heat exchange coil (18), the opening of the fourth solenoid valve (32) is decreased and the opening of the fifth solenoid valve (33) is increased.

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