Air conditioning system of energy storage coupled air source heat pump

Abstract

The utility model discloses an air conditioning system of an energy storage coupling air source heat pump, which belongs to the technical field of air conditioning systems and comprises a compressor connected with a first four-way reversing valve, the first four-way reversing valve connected with an indoor heat exchanger, a gas-liquid separator connected with the first four-way reversing valve, and a second four-way reversing valve connected with the second four-way reversing valve. The gas-liquid separator is connected with the compressor; the second four-way reversing valve is connected with the electronic expansion valve, the second four-way reversing valve is connected with a first valve and a third valve, the first valve is connected with a first-stage air cooling chamber outer side heat exchanger, the first-stage air cooling chamber outer side heat exchanger is connected with a second valve and a fourth valve, and the third valve is connected with the second valve and a second-stage liquid cooling chamber outer side heat exchanger; the second-stage liquid cooling chamber outer side heat exchanger is connected with a fifth valve, and the fifth valve is connected with a fourth valve and a second four-way reversing valve; the indoor heat exchanger is connected with the electronic expansion valve; the system further comprises an energy storage unit. The air conditioning system has the advantage that the air conditioning system is provided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air conditioning system technical field, especially relate to a kind of energy storage coupling air source heat pump's air conditioning system. BACKGROUND

[0002] At present, under the restriction of the physical process of air source heat pump operation, in heating condition, in order to fully absorb the heat of outdoor low-temperature air, the refrigerant in the evaporator must be reduced to below outdoor temperature to absorb heat, when the outdoor dew point temperature is low and the outdoor heat load reaches a certain degree, the surface temperature of the evaporator on the outdoor side will be lower than the dew point temperature and lower than 0 DEG C, at this time, the outdoor evaporator will frost, seriously affect the heat exchange effect of evaporator, in order to ensure the heating effect of unit, defrosting must be carried out, resulting in a large amount of waste of energy consumption, and the output capacity of unit will decay during defrosting, thereby affecting the heating effect of indoor.

[0003] In view of the frost problem of air source heat pump heating, an air conditioning system of energy storage coupling air source heat pump is designed. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing an air conditioning system of energy storage coupling air source heat pump. The utility model is realized by the following measures:

[0005] In the first aspect, the utility model provides an air conditioning system of energy storage coupling air source heat pump, characterized by comprising compressor, the outlet of compressor is connected with the first interface of first four-way reversing valve, the second interface of first four-way reversing valve is connected with the heating medium import of indoor heat exchanger, the third interface of first four-way reversing valve is connected with the import of gas-liquid separator, the fourth interface of first four-way reversing valve is connected with the first interface of second four-way reversing valve, the outlet of gas-liquid separator is connected with the import of compressor;

[0006] The second interface of second four-way reversing valve is connected with the outlet of electronic expansion valve, one end of first valve and third valve is connected with the third interface of second four-way reversing valve respectively, the other end of first valve is connected with the import of primary air-cooled outdoor side heat exchanger, one end of second valve and fourth valve is connected with the outlet of primary air-cooled outdoor side heat exchanger respectively, the other end of third valve is connected with the other end of second valve and the heating medium import of secondary liquid-cooled outdoor side heat exchanger respectively, one end of fifth valve is connected with the heating medium outlet of secondary liquid-cooled outdoor side heat exchanger, the other end of fifth valve is connected with the other end of fourth valve and the fourth interface of second four-way reversing valve respectively;

[0007] The heating medium outlet of indoor heat exchanger is connected with the import of electronic expansion valve, and the heating medium import and heating medium outlet of indoor heat exchanger are connected with indoor inlet water pipe and indoor outlet water pipe respectively.

[0008] The energy storage unit is in heat exchange with the secondary liquid cooling outdoor side heat exchanger.

[0009] Further, the energy storage unit is connected with the indoor water inlet pipe and the indoor water outlet pipe through pipelines, a seventh valve is arranged on the pipeline connected with the indoor water outlet pipe, and a sixth valve is arranged on the pipeline connected with the indoor water inlet pipe.

[0010] The twelfth valve and the eighth valve are arranged on the indoor water inlet pipe, the thirteenth valve and the ninth valve are arranged on the indoor water outlet pipe, and the pipeline is connected between the two valves on the indoor water inlet pipe and the indoor water outlet pipe, and the twelfth valve and the thirteenth valve are close to the indoor heat exchanger.

[0011] Further, the energy storage unit is one or more of a phase change energy storage unit, a water tank energy storage unit and a ground pipe energy storage unit.

[0012] Further, the phase change energy storage unit comprises a phase change energy storage container filled with phase change energy storage material, and a phase change energy storage water return pipe and a phase change energy storage water supply pipe arranged outside the phase change energy storage container, a water inlet pipe of the phase change energy storage container is connected with the phase change energy storage water supply pipe through a tee joint, a water outlet pipe of the phase change energy storage container is connected with the phase change energy storage water return pipe through a tee joint, a sixth valve and a tenth valve are arranged on the phase change energy storage water return pipe and located on both sides of the tee joint, a seventh valve and an eleventh valve are arranged on the phase change energy storage water supply pipe and located on both sides of the tee joint, and the tenth valve and the eleventh valve are respectively connected with a heat exchange medium inlet and a heat exchange medium outlet of the secondary liquid cooling outdoor side heat exchanger.

[0013] Further, both ends of the phase change energy storage container are flow uniform sections, heat exchange pipes (generally coil pipes) are arranged between the two flow uniform sections, and the phase change energy storage material is filled in the gaps between the heat exchange pipes.

[0014] The phase change energy storage unit further comprises a pipe circulating liquid pressure sensor for monitoring the pressure of the circulating liquid in the heat exchange pipe, an energy storage material temperature sensor for monitoring the temperature of the energy storage material, and a circulating liquid temperature sensor for monitoring the temperature of the circulating liquid in the heat exchange pipe. The phase change energy storage container adopts a container with a heat preservation layer.

[0015] (1) Working principle of the phase change energy storage unit in the energy storage working condition

[0016] The sixth valve and the seventh valve are opened, and the tenth valve and the eleventh valve are closed, the indoor medium flows through the sixth valve in the open state, flows into the phase change energy storage container, and the circulating fluid is uniformly distributed to each heat exchange pipe through the flow distribution section, the circulating fluid transmits energy to the phase change energy storage material through the heat exchange pipe, the phase change energy storage material is heated or cooled, and the phase change occurs, and the circulating fluid releases the energy and then enters the flow collection section, and then flows out of the phase change energy storage container, enters the phase change energy storage return water pipe, and flows back to the indoor pipeline through the seventh valve in the open state.

[0017] (2) Working principle of the phase change energy storage device in the energy release condition

[0018] The tenth valve and the eleventh valve are opened, and the sixth valve and the seventh valve are closed, the fluid flowing out of the outlet of the secondary liquid cooling outdoor side heat exchanger flows through the phase change energy storage water supply pipe, flows through the tenth valve in the open state, flows into the phase change energy storage container, and the circulating fluid is uniformly distributed to each heat exchange pipe through the flow distribution section, the circulating fluid transmits energy to the phase change energy storage material through the heat exchange pipe, the phase change energy storage material is heated or cooled, and the phase change occurs, and the circulating fluid releases the energy and then enters the flow collection section, and then flows out of the phase change energy storage device, enters the phase change energy storage return water pipe, and flows back to the secondary liquid cooling outdoor side heat exchanger through the eleventh valve in the open state.

[0019] Further, the water tank energy storage unit comprises a water tank with a jacket, a first water inlet pipe and a first water outlet pipe which are communicated with the jacket are arranged on the water tank, and a second water inlet pipe and a second water outlet pipe which are communicated with the jacket are also arranged on the water tank.

[0020] The sixth valve is arranged on the first water inlet pipe, the seventh valve is arranged on the first water outlet pipe, the tenth valve is arranged on the second water inlet pipe, and the eleventh valve is arranged on the second water outlet pipe, and the tenth valve and the eleventh valve are connected with the heat exchange medium inlet and the heat exchange medium outlet of the secondary liquid cooling outdoor side heat exchanger respectively.

[0021] Further, a high-position temperature sensor is arranged on the upper part of the inside of the water tank, a low-position temperature sensor is arranged on the lower part of the inside of the water tank, an exhaust port is arranged on the top of the water tank, an overflow port is arranged on the upper part of the side wall, an inspection hole is arranged on the top of the water tank, the inspection hole is sealed by a sealing cover, the water tank is a water tank with a heat preservation layer, a blowdown port hole is arranged on the lower part of the water tank, and a plurality of annular reinforcing ribs are arranged on the inner wall of the jacket along the axial direction.

[0022] Further, a liquid level meter for detecting the water level is arranged in the water tank.

[0023] (1) Working principle of the energy storage water tank in the energy storage condition

[0024] The sixth and seventh valves are open, while the tenth and eleventh valves are closed. The indoor medium flows through the open sixth valve into the water tank, heats or cools the medium in the tank, and then flows out through the first outlet pipe. Finally, it flows back into the indoor pipeline through the open seventh valve.

[0025] (2) Working principle of energy storage tank under energy release condition

[0026] With the tenth and eleventh valves open and the sixth and seventh valves closed, the fluid flowing out of the outlet of the secondary liquid cooling outdoor heat exchanger flows through the second inlet pipe, through the tenth valve which is open, into the water tank, heats or cools the medium in the energy storage tank, releases energy, flows out through the second outlet pipe, and flows back to the secondary liquid cooling outdoor heat exchanger through the eleventh valve which is open.

[0027] Furthermore, the buried pipe energy storage unit includes a well, several U-shaped pipes installed inside the well, and backfill soil to fill the internal space of the well;

[0028] It also includes a buried energy storage water supply pipe and a buried energy storage water return pipe installed outside the well. The buried energy storage water supply pipe is connected to the inlet of all U-shaped pipes through a tee, and the buried energy storage water return pipe is connected to the outlet of all U-shaped pipes through a tee. A sixth valve and a tenth valve are installed on the buried energy storage water supply pipe outside all the tee, and a seventh valve and an eleventh valve are installed on the buried energy storage water return pipe outside all the tee. The tenth valve and the eleventh valve are respectively connected to the heat exchange medium inlet and heat exchange medium outlet of the outdoor heat exchanger of the secondary liquid cooling room.

[0029] Furthermore, it also includes several soil temperature sensors pre-embedded inside the manhole and temperature measuring cables that power the soil temperature sensors. The U-shaped pipe can be laid horizontally or vertically, with vertical laying including single U-shaped pipe and double U-shaped pipe laying.

[0030] (1) Working principle of buried energy storage pipe under energy storage conditions

[0031] The sixth and seventh valves are open, while the tenth and eleventh valves are closed. The indoor medium flows through the open sixth valve and into the U-shaped pipe in the manhole. The circulating fluid transfers energy to the backfill soil and further to the outdoor soil. The backfill soil and outdoor soil are heated or cooled. After the circulating fluid releases its energy, it flows out of the U-shaped pipe and into the buried energy storage return pipe. It then flows back into the indoor pipeline through the open seventh valve.

[0032] (2) Working principle of energy storage buried pipe under energy release condition

[0033] With the tenth and eleventh valves open and the sixth and seventh valves closed, the fluid flowing out of the outlet of the secondary liquid-cooled outdoor heat exchanger passes through the tenth valve, which is in the open state, and flows into the U-shaped pipe in the manhole. The circulating fluid transfers energy to the backfill soil and further to the outdoor soil. The backfill soil and the outdoor soil are heated or cooled. After the circulating fluid releases its energy, it flows out of the U-shaped pipe and into the buried energy storage return water pipe. It then flows back to the secondary liquid-cooled outdoor heat exchanger through the eleventh valve, which is in the open state.

[0034] Furthermore, the phase change energy storage return water pipe and the phase change energy storage water supply pipe, the underground energy storage water supply pipe and the underground energy storage return water pipe, the first water inlet pipe and the first water outlet pipe, the second water inlet pipe and the second water outlet pipe are all connected to a circulation pump that provides power for the circulation of the medium.

[0035] Secondly, this embodiment provides a control method based on the air conditioning system, characterized in that it includes:

[0036] Outdoor single air source operation:

[0037] Valve open status: First valve, fourth valve, eighth valve, ninth valve, twelfth valve, thirteenth valve;

[0038] Valve closed status: Second valve, Third valve, Fifth valve, Sixth valve, Seventh valve, Tenth valve, Eleventh valve;

[0039] The refrigerant (heating medium) circulating in the unit is pressurized and heated by the compressor, becoming a high-pressure, high-temperature gas. This gas enters the first port of the first four-way reversing valve. After reversing, it flows from the second port of the first four-way reversing valve into the indoor heat exchanger. The high-pressure, high-temperature gas releases heat to the indoor medium through the indoor heat exchanger, raising the temperature of the indoor medium and achieving heating. The high-pressure, high-temperature gas then releases heat, becoming a high-pressure liquid. It enters the electronic expansion valve for pressure reduction and cooling, changing from a high-pressure liquid to a low-pressure liquid. The circulating refrigerant is then cooled and flows into the second port of the second four-way reversing valve. After reversing, it flows from the second four-way reversing valve... The third inlet flows into the first-stage air-cooled outdoor heat exchanger. The outdoor air transfers heat to the low-temperature refrigerant in the first-stage air-cooled outdoor heat exchanger. The refrigerant absorbs heat and changes from a low-pressure liquid to a low-pressure gas. After flowing out of the first-stage air-cooled outdoor heat exchanger, it flows through the fourth valve, which is in the open state, into the fourth inlet of the second four-way reversing valve. After reversing, it enters the fourth inlet of the first four-way reversing valve from the first inlet of the second four-way reversing valve. After further reversing, it flows into the gas-liquid separator from the third inlet of the first four-way reversing valve for gas-liquid separation. The separated liquid enters the compressor for the next cycle.

[0040] Outdoor single-storage operation:

[0041] Valve open status: Second valve, Third valve, Fifth valve, Eighth valve, Ninth valve, Twelfth valve, Thirteenth valve;

[0042] When the valves are closed: valves 1, 4, 6, 7, 10, and 11; the refrigerant circulating in the unit is pressurized and heated by the compressor, becoming a high-pressure, high-temperature gas. This gas enters the first port of the first four-way reversing valve, and after reversing, flows into the indoor heat exchanger from the second port. The high-pressure, high-temperature gas releases heat to the indoor medium through the indoor heat exchanger, raising the temperature of the medium on the user side and achieving heating. The high-pressure, high-temperature gas then releases heat, becoming a high-pressure liquid, and enters the electronic expansion valve for pressure reduction and cooling, changing from a high-pressure liquid to a low-pressure liquid. The circulating refrigerant is then cooled and flows into the second four-way refrigerant valve. The refrigerant flows from the second port of the valve to the third port of the second four-way reversing valve, through the third valve, into the outdoor heat exchanger of the secondary liquid cooling system. It then transfers heat to the energy storage unit that exchanges heat with the outdoor heat exchanger of the secondary liquid cooling system. After the refrigerant flows out of the outdoor heat exchanger of the secondary liquid cooling system, it flows through the fifth valve, which is in the open state, into the fourth port of the second four-way reversing valve. After reversing, it enters the fourth port of the first four-way reversing valve from the first port of the second four-way reversing valve. After further reversing, it flows into the gas-liquid separator from the third port of the first four-way reversing valve for gas-liquid separation. This prevents the gas from entering the compressor, and the separated liquid enters the compressor for the next cycle.

[0043] Operating conditions of outdoor air-source coupled energy storage unit:

[0044] Valve open status: First valve, second valve, fifth valve, eighth valve, ninth valve, twelfth valve, thirteenth valve;

[0045] When valves are closed: valves 3, 4, 6, 7, 10, and 11; the refrigerant circulating in the unit, after being pressurized and heated by the compressor, becomes a high-pressure, high-temperature gas. This gas enters the first port of the first four-way reversing valve, and after reversing, flows from the second port of the first four-way reversing valve into the indoor heat exchanger. The high-pressure, high-temperature gas releases heat to the indoor medium through the indoor heat exchanger, raising the temperature of the indoor medium and achieving heating. The high-pressure, high-temperature gas then releases heat, becoming a high-pressure liquid, and enters the electronic expansion valve for depressurization and cooling, changing from a high-pressure liquid to a low-pressure liquid. The circulating refrigerant cools down and flows into the second port of the second four-way reversing valve. After reversing, it flows from the third port of the second four-way reversing valve into the first-stage air-cooled outdoor heat exchanger. The outdoor air transfers heat to the first-stage air-cooled outdoor heat exchanger. The low-temperature refrigerant in the side heat exchanger absorbs heat and changes from a low-pressure liquid to a low-pressure gas-liquid two-phase mixture. After flowing out of the first-stage air-cooled outdoor heat exchanger, it flows into the second-stage liquid-cooled outdoor heat exchanger through the second valve (while the fourth valve is closed). Through the coils in the heat exchanger, the refrigerant's cooling capacity is transferred to the circulating medium of the energy storage unit. The refrigerant further absorbs heat and changes from a low-pressure gas-liquid two-phase mixture to a low-pressure gas. It flows into the fourth port of the second four-way reversing valve. After reversing, it enters the fourth port of the first four-way reversing valve from the first port of the second four-way reversing valve. After further reversing, it flows into the gas-liquid separator from the third port of the first four-way reversing valve for gas-liquid separation to prevent gas from entering the compressor. The separated liquid enters the compressor for the next cycle.

[0046] Energy storage conditions of energy storage body:

[0047] Open status: First valve, fourth valve, sixth valve, seventh valve, twelfth valve, thirteenth valve;

[0048] Closed state: Second valve, third valve, fifth valve, eighth valve, ninth valve, tenth valve, eleventh valve;

[0049] The refrigerant circulating in the unit is pressurized and heated by the compressor, becoming a high-pressure, high-temperature gas. This gas enters the first port of the first four-way reversing valve. After reversing, it flows from the second port of the first four-way reversing valve into the indoor heat exchanger. The high-pressure, high-temperature gas releases heat to the indoor medium through the indoor heat exchanger, raising the temperature of the indoor medium and achieving heating. After releasing heat, the high-pressure, high-temperature gas becomes a high-pressure liquid and enters the electronic expansion valve for depressurization and cooling, changing from a high-pressure liquid to a low-pressure liquid. The circulating refrigerant then cools down and flows into the second port of the second four-way reversing valve. After reversing, it flows from the third port of the second four-way reversing valve into the primary air-cooled system. In the outdoor heat exchanger, outdoor air transfers heat to the low-temperature refrigerant inside the primary air-cooled outdoor heat exchanger. The refrigerant absorbs heat, changing from a low-pressure liquid to a low-pressure gas. After flowing out of the primary air-cooled outdoor heat exchanger, it passes through the fourth valve (which is in the open state, while the second valve is in the closed state) and flows into the fourth port of the second four-way reversing valve. After reversing, it enters the fourth port of the first four-way reversing valve from the first port of the second four-way reversing valve. After further reversing, it flows into the gas-liquid separator from the third port of the first four-way reversing valve for gas-liquid separation. The separated liquid enters the compressor for the next cycle.

[0050] On the heat storage side, valves 8 and 9 are closed, while valves 6, 7, 12, and 13 are open. The indoor medium flows through valve 6, the energy storage unit, valve 7, valve 12, the indoor heat exchanger, and valve 13, absorbing the high-temperature heat flowing through the indoor heat exchanger to achieve energy storage in the energy storage unit.

[0051] Direct energy storage operation:

[0052] Valve open status: sixth valve, seventh valve, eighth valve, ninth valve;

[0053] Valve closed status: First valve, second valve, third valve, fourth valve, fifth valve, tenth valve, eleventh valve, twelfth valve, thirteenth valve.

[0054] The energy storage body is heated after accumulating energy. When the temperature reaches a certain level, the energy storage body can fully bear the heat load on the indoor side without turning on the compressor. At this time, the sixth, seventh, eighth, and ninth valves are opened, and all other valves are closed. The indoor medium flows into the energy storage unit through the ninth and sixth valves, is heated by the energy storage unit, and then flows out through the seventh and eighth valves into the indoor side, realizing direct indoor heating.

[0055] This utility model is equipped with a second four-way reversing valve, which can ensure that the circulating medium inside the air conditioning system always flows from the primary air-cooled outdoor heat exchanger to the secondary liquid-cooled outdoor heat exchanger, avoiding reverse flow.

[0056] The first to thirteenth valves involved in this utility model include, but are not limited to, automatic valves with switching functions, electric valves, or electric valves with both switching and regulating functions, and other automatic valves.

[0057] In addition to the pipes, equipment, valves, and accessories included in this utility model specification, this utility model also includes necessary but not limited to other auxiliary equipment and accessories such as circulating pumps, filters, valves, pressure gauges, and thermometers.

[0058] The beneficial effects of the technical solution provided by this utility model embodiment are:

[0059] This utility model is equipped with a two-stage liquid-cooled outdoor heat exchanger and supporting pipes and valves, which can realize the switching of five working conditions: outdoor single air source working condition, outdoor single energy storage body working condition, outdoor air source coupled with energy storage body working condition, energy storage body working condition, and energy storage body direct supply working condition.

[0060] This invention utilizes off-peak electricity prices during non-working hours at night to store energy as a secondary liquid-cooled outdoor heat exchanger in an energy storage coupled air source heat pump air conditioning system. This avoids the frequent frosting and defrosting problems that occur during air source heat pump heating, saves defrosting energy consumption, and improves daytime working energy efficiency.

[0061] This invention utilizes off-peak electricity prices during non-working hours at night for energy storage, serving as a secondary liquid-cooled outdoor heat exchanger in an energy storage coupled air source heat pump system. This improves the heating and cooling performance of the air source heat pump under extremely cold and hot conditions, enhances the heating and cooling effects, improves the operational stability under harsh conditions, and avoids the attenuation of heating and cooling effects.

[0062] Conventional energy storage air conditioning systems operate by supplying energy independently or in conjunction with the indoor (user) side of the unit. This invention differs from conventional energy storage air conditioning systems in that, in addition to supplying chilled or hot water to the air conditioner independently, the energy storage body can also absorb heat from the condenser of the air source heat pump during cooling and release heat to the evaporator of the air source heat pump during heating. Compared to conventional energy storage systems, this invention places lower requirements on the physical properties of phase change energy storage materials, provides better working conditions for phase change energy storage materials, and improves the working stability and service life of the energy storage materials.

[0063] Conventional ground source heat pumps use buried pipes for inter-seasonal energy storage, with a typical operating cycle of one year. This long time span makes temperature field control difficult and prone to thermal imbalances, leading to performance degradation. In contrast, this invention utilizes buried energy storage pipes that store energy across days, storing energy at night and using it during the day. With a one-day operating cycle, the shorter time span allows for precise temperature field control, preventing thermal imbalances and improving the heat pump's stability and durability. Attached Figure Description

[0064] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings listed below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0065] Figure 1 This is a schematic diagram of the working principle of an air conditioning system with an energy storage coupled air source heat pump according to an embodiment of this utility model;

[0066] Figure 2 This is a schematic diagram of the phase change energy storage unit;

[0067] Figure 3 This is a schematic diagram of the water tank energy storage unit;

[0068] Figure 4 This is a schematic diagram of the structure of a buried pipe energy storage unit;

[0069] Figure 5 This is a schematic diagram of the working principle of an air conditioning system with an energy storage buried pipe coupled to an air source heat pump.

[0070] The components represented by each number in the attached diagram are listed below: 1. First four-way reversing valve; 2. Compressor; 3. Gas-liquid separator; 4. Indoor heat exchanger; 5. Electronic expansion valve; 6. Second four-way reversing valve; 7. First-stage air-cooled outdoor heat exchanger; 8. Second-stage liquid-cooled outdoor heat exchanger; 9. Energy storage unit; 10. First valve; 11. Second valve; 12. Third valve; 13. Fourth valve; 14. Fifth valve; 15. Sixth valve; 16. Seventh valve; 17. Eighth valve; 18. Ninth valve; 19. Tenth valve; 20. Eleventh valve; 21. Twelfth valve; 22. Thirteenth valve; 23. Circulation pump one; 24. Circulation pump two; 1a. Phase change energy storage return water pipe; 2a. Phase change energy storage supply water pipe; 3a. Phase change energy storage container; 4a. Insulation layer; 5a. 1. Flow equalization section; 6a. Heat exchange tube; 7a. Phase change energy storage material; 8a. Energy storage material temperature sensor; 9a. Intra-pipe circulating liquid pressure sensor; 10a. Circulating liquid temperature sensor; 11a. Phase change tee; 1b. Overflow port; 2b. First water inlet pipe; 3b. First water outlet pipe; 4b. Drainage outlet; 5b. Second water inlet pipe; 6b. High-level temperature sensor; 7b. Low-level temperature sensor; 8b. Second water outlet pipe; 9b. Exhaust port; 10b. Inspection hole; 11b. Liquid level gauge; 12b. Water tank; 13b. Annular reinforcing rib; 1c. Buried energy storage return pipe; 2c. Buried energy storage supply pipe; 3c. Buried pipe tee; 4c. Pipe well; 5c. Outdoor soil; 6c. Backfill soil; 7c. U-shaped pipe; 8c. Temperature measuring cable; 9c. Soil temperature sensor. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. Of course, the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0072] See Figures 1-5 This embodiment provides an air conditioning system with an energy storage coupled air source heat pump, characterized in that it includes a compressor 2, the outlet of the compressor 2 is connected to the first interface of the first four-way reversing valve 1, the second interface of the first four-way reversing valve 1 is connected to the heating medium inlet of the indoor heat exchanger, the third interface of the first four-way reversing valve 1 is connected to the inlet of the gas-liquid separator 3, the fourth interface of the first four-way reversing valve 1 is connected to the first interface of the second four-way reversing valve 6, and the outlet of the gas-liquid separator 3 is connected to the inlet of the compressor 2.

[0073] The second port of the second four-way reversing valve 6 is connected to the outlet of the electronic expansion valve 5. The third port of the second four-way reversing valve 6 is connected to one end of the first valve 10 and the third valve 12 respectively. The other end of the first valve 10 is connected to the inlet of the first-stage air-cooled outdoor heat exchanger 7. The outlet of the first-stage air-cooled outdoor heat exchanger 7 is connected to one end of the second valve 11 and the fourth valve 13 respectively. The other end of the third valve 12 is connected to the other end of the second valve 11 and the heating medium inlet of the second-stage liquid-cooled outdoor heat exchanger 8 respectively. The heating medium outlet of the second-stage liquid-cooled outdoor heat exchanger 8 is connected to one end of the fifth valve 14. The other end of the fifth valve 14 is connected to the other end of the fourth valve 13 and the fourth port of the second four-way reversing valve 6 respectively.

[0074] The heating medium outlet of the indoor heat exchanger is connected to the inlet of the electronic expansion valve 5, and the heat exchange medium inlet and outlet of the indoor heat exchanger are respectively connected to the indoor water inlet pipe and the indoor water outlet pipe.

[0075] It also includes an energy storage unit that exchanges heat with the outdoor heat exchanger 8 of the secondary liquid cooler.

[0076] The energy storage unit is connected to the indoor water inlet pipe and the indoor water outlet pipe through pipelines. A seventh valve 16 is installed on the pipeline connected to the indoor water outlet pipe, and a sixth valve 15 is installed on the pipeline connected to the indoor water inlet pipe.

[0077] The indoor water inlet pipe is equipped with a twelfth valve 21 and an eighth valve 17, and the indoor water outlet pipe is equipped with a thirteenth valve 22 and a ninth valve 18. The pipeline is connected between the two valves on the indoor water inlet pipe and the indoor water outlet pipe. The twelfth valve 21 and the thirteenth valve 22 are close to the indoor heat exchanger.

[0078] Energy storage unit 9 is one or more of phase change energy storage unit, water tank energy storage unit, and buried pipe energy storage unit.

[0079] The phase change energy storage unit includes a phase change energy storage container 3a filled with phase change energy storage material 7a, and a phase change energy storage return water pipe 1a and a phase change energy storage supply water pipe 2a disposed outside the phase change energy storage container 3a. The inlet pipe of the phase change energy storage container 3a is connected to the phase change energy storage supply water pipe 2a through a phase change tee 11a, and the outlet pipe of the phase change energy storage container 3a is connected to the phase change energy storage return water pipe 1a through a phase change tee 11a. A sixth valve 15 and a tenth valve 19 are disposed on the phase change energy storage return water pipe 1a and located on both sides of the phase change tee 11a. A seventh valve 16 and an eleventh valve 20 are disposed on the phase change energy storage supply water pipe 2a and located on both sides of the phase change tee 11a. The tenth valve 19 and the eleventh valve 20 are respectively connected to the heat exchange medium inlet and heat exchange medium outlet of the outdoor heat exchanger 8 of the secondary liquid cooling room.

[0080] The two ends of the phase change energy storage container 3a are flow equalization sections 5a. A heat exchange tube 6a (usually a coil) is installed between the two flow equalization sections 5a. The gap between the heat exchange tubes 6a is filled with phase change energy storage material 7a.

[0081] The phase change energy storage unit also includes an internal circulating liquid pressure sensor 9a for monitoring the circulating liquid pressure inside the heat exchange tube 6a, an energy storage material temperature sensor 8a for monitoring the temperature of the energy storage material, and a circulating liquid temperature sensor 10a for monitoring the circulating liquid temperature inside the heat exchange tube 6a. The phase change energy storage container 3a is a container with an insulation layer 4a.

[0082] (1) Working principle of phase change energy storage unit under energy storage conditions

[0083] The sixth valve 15 and the seventh valve 16 are open, while the tenth valve 19 and the eleventh valve 20 are closed. The indoor medium flows through the open sixth valve 15 and into the phase change energy storage container 3a. The circulating fluid is evenly distributed to each heat exchange tube 6a through the flow equalization section 5a. The circulating fluid transfers energy to the phase change energy storage material 7a through the heat exchange tubes 6a. The phase change energy storage material 7a is heated or cooled, resulting in a phase change. After the circulating fluid releases all its energy, it enters the confluence section, then flows out of the phase change energy storage container 3a and into the phase change energy storage return water pipe 1a. Finally, it flows back into the indoor pipeline through the open seventh valve 16.

[0084] (2) Working principle of phase change energy storage device under energy release condition

[0085] The tenth valve 19 and the eleventh valve 20 are open, while the sixth valve 15 and the seventh valve 16 are closed. The fluid flowing out of the outlet of the secondary liquid cooling outdoor heat exchanger 8 passes through the phase change energy storage water supply pipe 2a, through the tenth valve 19 which is in the open state, and flows into the phase change energy storage container 3a. The circulating fluid is evenly distributed to each heat exchange tube 6a through the flow equalization section 5a. The circulating fluid transfers energy to the phase change energy storage material 7a through the heat exchange tube 6a. The phase change energy storage material 7a is heated or cooled, and a phase change occurs. After the circulating fluid releases all its energy, it enters the confluence section, then flows out of the phase change energy storage device, enters the phase change energy storage return water pipe 1a, and flows back to the secondary liquid cooling outdoor heat exchanger 8 through the eleventh valve 20 which is in the open state.

[0086] The water tank energy storage unit includes a water tank 12b with a jacket. The water tank 12b is provided with a first water inlet pipe 2b and a first water outlet pipe 3b that are connected to the jacket. The water tank 12b is also provided with a second water inlet pipe 5b and a second water outlet pipe 8b that are connected to the jacket.

[0087] The sixth valve 15 is installed on the first inlet pipe 2b, the seventh valve 16 is installed on the first outlet pipe 3b, the tenth valve 19 is installed on the second inlet pipe 5b, and the eleventh valve 20 is installed on the second outlet pipe 8b. The tenth valve 19 and the eleventh valve 20 are respectively connected to the heat exchange medium inlet and heat exchange medium outlet of the outdoor heat exchanger 8 of the secondary liquid cooling room.

[0088] A high-level temperature sensor 6b is installed in the upper part of the interior of the water tank 12b, and a low-level temperature sensor 7b is installed in the lower part of the interior of the water tank 12b. A vent 9b is installed on the top of the water tank 12b, and an overflow port 1b is installed on the upper part of the side wall. An inspection hole 10b is installed on the top of the water tank 12b, and the inspection hole 10b is sealed by a sealing cover. The water tank 12b is a water tank 12b with a heat insulation layer 4a. A drain hole 4b is installed at the bottom of the water tank 12b. Several annular reinforcing ribs 13b are arranged along the axial direction on the inner wall of the jacket.

[0089] The water tank 12b is also equipped with a level gauge 11b for detecting the water level.

[0090] (1) Working principle of energy storage tank under energy storage conditions

[0091] The sixth valve 15 and the seventh valve 16 are open, while the tenth valve 19 and the eleventh valve 20 are closed. The indoor medium flows through the sixth valve 15, which is in the open state, and into the water tank 12b. After heating or cooling the medium in the water tank 12b, it flows out through the first outlet pipe 3b and returns to the indoor pipeline through the seventh valve 16, which is in the open state.

[0092] (2) Working principle of energy storage tank under energy release condition

[0093] The tenth valve 19 and the eleventh valve 20 are open, and the sixth valve 15 and the seventh valve 16 are closed. The fluid flowing out of the outlet of the secondary liquid cooling outdoor heat exchanger 8 flows through the second inlet pipe 5b, through the tenth valve 19 which is in the open state, and into the water tank 12b to heat or cool the medium in the energy storage water tank 12b. After releasing energy, it flows out through the second outlet pipe 8b and flows back to the secondary liquid cooling outdoor heat exchanger 8 through the eleventh valve 20 which is in the open state.

[0094] The underground pipe energy storage unit includes a pipe well 4c, several U-shaped pipes 7c installed inside the pipe well 4c, and backfill soil 6c filling the internal space of the pipe well 4c.

[0095] It also includes a buried energy storage water supply pipe 2c and a buried energy storage water return pipe 1c installed outside the manhole 4c. The buried energy storage water supply pipe 2c is connected to the inlet of all U-shaped pipes 7c through a buried pipe tee 3c. The buried energy storage water return pipe 1c is connected to the outlet of all U-shaped pipes 7c through a buried pipe tee 3c. A sixth valve 15 and a tenth valve 19 are installed on the buried energy storage water supply pipe 2c and outside all buried pipe tee 3c. A seventh valve 16 and an eleventh valve 20 are installed on the buried energy storage water return pipe 1c and outside all buried pipe tee 3c. The tenth valve 19 and the eleventh valve 20 are connected to the heat exchange medium inlet and heat exchange medium outlet of the outdoor heat exchanger 8 of the secondary liquid cooling room, respectively.

[0096] It also includes several soil temperature sensors 9c pre-embedded inside the manhole and temperature measuring cables 8c that power the soil temperature sensors 9c. The U-shaped pipe 7c can be laid horizontally or vertically, and the vertical laying includes single U-shaped pipe 7c and double U-shaped pipe 7c laying.

[0097] (1) Working principle of buried energy storage pipe under energy storage conditions

[0098] The sixth valve 15 and the seventh valve 16 are open, while the tenth valve 19 and the eleventh valve 20 are closed. The indoor medium flows through the sixth valve 15, which is in the open state, and into the U-shaped pipe 7c in the manhole 4c. The circulating fluid transfers energy to the backfill soil 6c and further to the outdoor soil 5c. The backfill soil 6c and the outdoor soil 5c are heated or cooled. After the circulating fluid releases its energy, it flows out of the U-shaped pipe 7c and into the buried energy storage return water pipe 1c. It then flows back into the indoor pipeline through the seventh valve 16, which is in the open state.

[0099] (2) Working principle of energy storage buried pipe under energy release condition

[0100] The tenth valve 19 and the eleventh valve 20 are open, while the sixth valve 15 and the seventh valve 16 are closed. The fluid flowing out of the outlet of the secondary liquid-cooled outdoor heat exchanger 8 passes through the tenth valve 19, which is in the open state, and flows into the U-shaped pipe 7c in the manhole 4c. The circulating fluid transfers energy to the backfill soil 6c and further to the outdoor soil 5c. The backfill soil 6c and the outdoor soil 5c are heated or cooled. After the circulating fluid releases its energy, it flows out of the U-shaped pipe 7c and into the buried pipe energy storage return water pipe 1c. It then flows back to the secondary liquid-cooled outdoor heat exchanger 8 through the eleventh valve 20, which is in the open state.

[0101] Phase change energy storage return water pipe 1a and phase change energy storage supply water pipe 2a, buried pipe energy storage supply water pipe 2c and buried pipe energy storage return water pipe 1c, first inlet pipe 2b and first outlet pipe 3b, second inlet pipe 5b and second outlet pipe 8b are all connected to a circulation pump that provides power for the circulation of the medium, such as Figure 1 and Figure 5 As shown, there are circulating pump 1 23 and circulating pump 2 24.

[0102] Secondly, this embodiment provides a control method based on an air conditioning system, characterized in that it includes:

[0103] 1. Outdoor single air source operation:

[0104] Valve open status: First valve 10, Fourth valve 13, Eighth valve 17, Ninth valve 18, Twelfth valve 21, Thirteenth valve 22;

[0105] Valve closed state: Second valve 11, Third valve 12, Fifth valve 14, Sixth valve 15, Seventh valve 16, Tenth valve 19, Eleventh valve 20;

[0106] The refrigerant (heating medium) circulating in the unit is pressurized and heated by compressor 2, becoming a high-pressure, high-temperature gas. It enters the first port of the first four-way reversing valve 1, and after reversing, flows from the second port of the first four-way reversing valve 1 into the indoor heat exchanger 4. The high-pressure, high-temperature gas releases heat to the indoor medium through the indoor heat exchanger 4, raising the temperature of the indoor medium and achieving heating. The high-pressure, high-temperature gas releases heat, becoming a high-pressure liquid, and enters the electronic expansion valve 5 for depressurization and cooling, changing from a high-pressure liquid to a low-pressure liquid. The circulating refrigerant is then cooled and flows into the second port of the second four-way reversing valve 6. After reversing, it flows from the third port of the second four-way reversing valve 6... The air flows into the primary air-cooled outdoor heat exchanger 7. The outdoor air transfers heat to the low-temperature refrigerant in the primary air-cooled outdoor heat exchanger 7. The refrigerant absorbs heat and changes from a low-pressure liquid to a low-pressure gas. After flowing out of the primary air-cooled outdoor heat exchanger 7, it flows into the fourth port of the second four-way reversing valve 6 through the fourth valve 13, which is in the open state. After reversing, it enters the fourth port of the first four-way reversing valve 1 from the first port of the second four-way reversing valve 6. After further reversing, it flows into the gas-liquid separator 3 from the third port of the first four-way reversing valve 1 for gas-liquid separation. The separated liquid enters the compressor 2 for the next cycle.

[0107] 2. Outdoor single-storage operation:

[0108] Valve open status: Second valve 11, Third valve 12, Fifth valve 14, Eighth valve 17, Ninth valve 18, Twelfth valve 21, Thirteenth valve 22;

[0109] Valve closed state: Valve 10, Valve 13, Valve 15, Valve 16, Valve 19, Valve 20; The refrigerant circulating in the unit, after being pressurized and heated by compressor 2, becomes high-pressure, high-temperature gas, which enters the first port of the first four-way reversing valve 1. After reversing, it flows from the second port of the first four-way reversing valve 1 into the indoor heat exchanger 4. The high-pressure, high-temperature gas releases heat to the indoor medium through the indoor heat exchanger 4, raising the temperature of the user-side medium and achieving heating. The high-pressure, high-temperature gas releases heat, becoming a high-pressure liquid, and enters the electronic expansion valve 5 for depressurization and cooling, changing from a high-pressure liquid to a low-pressure liquid. The circulating refrigerant then cools down and flows into the second port of the second four-way reversing valve 6. After reversing, the refrigerant flows from the third port of the second four-way reversing valve 6 through the third valve 12 into the secondary liquid cooling outdoor heat exchanger 8, where it transfers heat to the energy storage unit 9 that exchanges heat with the secondary liquid cooling outdoor heat exchanger 8. After the refrigerant flows out of the secondary liquid cooling outdoor heat exchanger 8, it flows through the fifth valve 14, which is in the open state, into the fourth port of the second four-way reversing valve 6. After reversing, it enters the fourth port of the first four-way reversing valve 1 from the first port of the second four-way reversing valve 6. After further reversing, it flows into the gas-liquid separator 3 from the third port of the first four-way reversing valve 1 for gas-liquid separation, preventing gas from entering the compressor 2. The separated liquid enters the compressor 2 for the next cycle.

[0110] 3. Operating conditions of the outdoor air source coupled energy storage unit:

[0111] Valve open status: Valve 10, Valve 21, Valve 5, Valve 14, Valve 8, Valve 17, Valve 9, Valve 18, Valve 12, Valve 21, Valve 13;

[0112] Valve closed state: Third valve 12, Fourth valve 13, Sixth valve 15, Seventh valve 16, Tenth valve 19, Eleventh valve 20; The unit's circulating refrigerant, after being pressurized and heated by compressor 2, becomes high-pressure, high-temperature gas, entering the first port of the first four-way reversing valve 1. After reversing, it flows from the second port of the first four-way reversing valve 1 into the indoor heat exchanger 4. The high-pressure, high-temperature gas releases heat to the indoor medium through the indoor heat exchanger 4, raising the temperature of the indoor medium and achieving heating. The high-pressure, high-temperature gas releases heat, becoming high-pressure liquid, and enters the electronic expansion valve 5 for depressurization and cooling, changing from high-pressure liquid to low-pressure liquid. The circulating refrigerant achieves cooling and flows into the second port of the second four-way reversing valve 6. After reversing, it flows from the third port of the second four-way reversing valve 6 into the first-stage air-cooled outdoor heat exchanger 7. The outdoor air transfers heat to the first-stage air-cooled outdoor heat exchanger 7. The low-temperature refrigerant in the outdoor heat exchanger 7 absorbs heat and changes from a low-pressure liquid to a low-pressure gas-liquid two-phase mixture. After flowing out of the first-stage air-cooled outdoor heat exchanger 7, it flows into the second-stage liquid-cooled outdoor heat exchanger 8 through the second valve 11 (which is in the open state at this time, while the fourth valve 13 is in the closed state). Through the coils in the heat exchanger, the refrigerant's cooling capacity is transferred to the circulating medium in the energy storage unit 9. The refrigerant further absorbs heat and changes from a low-pressure gas-liquid two-phase mixture to a low-pressure gas. It flows into the fourth port of the second four-way reversing valve 6. After reversing, it enters the fourth port of the first four-way reversing valve 1 from the first port of the second four-way reversing valve 6. After further reversing, it flows into the gas-liquid separator 3 from the third port of the first four-way reversing valve 1 for gas-liquid separation to prevent the gas from entering the compressor 2. The separated liquid enters the compressor 2 for the next cycle.

[0113] 4. Energy storage conditions of the energy storage body:

[0114] Open status: First valve 10, Fourth valve 13, Sixth valve 15, Seventh valve 16, Twelfth valve 21, Thirteenth valve 22;

[0115] Closed state: Second valve 11, Third valve 12, Fifth valve 14, Eighth valve 17, Ninth valve 18, Tenth valve 19, Eleventh valve 20

[0116] The refrigerant circulating in the unit is pressurized and heated by compressor 2, becoming a high-pressure, high-temperature gas. It enters the first port of the first four-way reversing valve 1, and after reversing, flows from the second port of the first four-way reversing valve 1 into the indoor heat exchanger 4. The high-pressure, high-temperature gas releases heat to the indoor medium through the indoor heat exchanger 4, raising the temperature of the indoor medium and achieving heating. After releasing heat, the high-pressure, high-temperature gas becomes a high-pressure liquid, enters the electronic expansion valve 5 for depressurization and cooling, changing from a high-pressure liquid to a low-pressure liquid. The circulating refrigerant is cooled and flows into the second port of the second four-way reversing valve 6. After reversing, it flows from the third port of the second four-way reversing valve 6 into the outdoor side of the primary air-cooled unit. In heat exchanger 7, outdoor air transfers heat to the low-temperature refrigerant inside the primary air-cooled outdoor heat exchanger 7. The refrigerant absorbs heat and changes from a low-pressure liquid to a low-pressure gas. After flowing out of the primary air-cooled outdoor heat exchanger 7, it flows through the fourth valve 13 (which is in the open state, while the second valve 11 is in the closed state) into the fourth port of the second four-way reversing valve 6. After reversing, it enters the fourth port of the first four-way reversing valve 1 from the first port of the second four-way reversing valve 6. After further reversing, it flows into the gas-liquid separator 3 from the third port of the first four-way reversing valve 1 for gas-liquid separation. The separated liquid enters the compressor 2 for the next cycle.

[0117] On the heat storage side, valves 17 and 18 are closed, while valves 15, 16, 21, and 22 are open. The indoor medium flows through valve 15, energy storage unit 9, valve 16, valve 21, indoor heat exchanger, and valve 22, absorbing the high-temperature heat flowing through the indoor heat exchanger to achieve energy storage in energy storage unit 9.

[0118] 5. Direct power supply from energy storage system:

[0119] Valve open status: sixth valve 15, seventh valve 16, eighth valve 17, ninth valve 18;

[0120] Valve closed status: First valve 10, Second valve 11, Third valve 12, Fourth valve 13, Fifth valve 14, Tenth valve 19, Eleventh valve 20, Twelfth valve 21, Thirteenth valve 22.

[0121] After the energy storage body is heated, when the temperature reaches a certain level, the energy storage body can fully bear the heat load on the indoor side without turning on the compressor 2. At this time, the sixth valve 15, the seventh valve 16, the eighth valve 17, and the ninth valve 18 are opened, and all other valves are closed. The indoor medium flows into the energy storage unit 9 through the ninth valve 18 and the sixth valve 15. After being heated by the energy storage unit 9, it flows out and flows into the indoor side through the seventh valve 16 and the eighth valve 17, realizing direct indoor heating.

[0122] This utility model is equipped with a second four-way reversing valve 6, which can ensure that the circulating medium inside the air conditioning system always flows from the first-stage air-cooled outdoor heat exchanger 7 to the second-stage liquid-cooled outdoor heat exchanger 8, avoiding reverse flow.

[0123] The first valve 10 to the thirteenth valve 22 involved in this utility model include, but are not limited to, automatic valves, electric valves, or electric valves with both switching and regulating functions, and other automatic valves.

[0124] In addition to the pipes, equipment, valves, and accessories included in this utility model specification, this utility model also includes necessary but not limited to other auxiliary equipment and accessories such as circulating pumps, filters, valves, pressure gauges, and thermometers.

[0125] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air conditioning system with energy storage coupled to an air source heat pump, characterized in that, The system includes a compressor, the outlet of which is connected to the first port of a first four-way reversing valve, the second port of which is connected to the heating medium inlet of an indoor heat exchanger, the third port of which is connected to the inlet of a gas-liquid separator, the fourth port of which is connected to the first port of a second four-way reversing valve, and the outlet of which is connected to the inlet of the compressor. The second port of the second four-way reversing valve is connected to the outlet of the electronic expansion valve. The third port of the second four-way reversing valve is connected to one end of the first valve and the third valve respectively. The other end of the first valve is connected to the inlet of the first-stage air-cooled outdoor heat exchanger. The outlet of the first-stage air-cooled outdoor heat exchanger is connected to one end of the second valve and the fourth valve respectively. The other end of the third valve is connected to the other end of the second valve and the heating medium inlet of the second-stage liquid-cooled outdoor heat exchanger respectively. The heating medium outlet of the second-stage liquid-cooled outdoor heat exchanger is connected to one end of the fifth valve. The other end of the fifth valve is connected to the other end of the fourth valve and the fourth port of the second four-way reversing valve respectively. The heating medium outlet of the indoor heat exchanger is connected to the inlet of the electronic expansion valve, and the heat exchange medium inlet and outlet of the indoor heat exchanger are respectively connected to the indoor water inlet pipe and the indoor water outlet pipe. It also includes an energy storage unit that exchanges heat with the outdoor heat exchanger of the secondary liquid cooler.

2. The air conditioning system with energy storage coupled to an air source heat pump according to claim 1, characterized in that, The energy storage unit is connected to the indoor water inlet pipe and the indoor water outlet pipe through pipelines. A seventh valve is installed on the pipeline connected to the indoor water outlet pipe, and a sixth valve is installed on the pipeline connected to the indoor water inlet pipe. The indoor water inlet pipe is equipped with a twelfth valve and an eighth valve, and the indoor water outlet pipe is equipped with a thirteenth valve and a ninth valve. The pipeline is connected between the two valves on the indoor water inlet pipe and the indoor water outlet pipe. The twelfth valve and the thirteenth valve are close to the indoor heat exchanger.

3. The air conditioning system with energy storage coupled to an air source heat pump according to claim 2, characterized in that, The energy storage unit is one or more of the following: phase change energy storage unit, water tank energy storage unit, and buried pipe energy storage unit.

4. The air conditioning system with energy storage coupled to an air source heat pump according to claim 3, characterized in that, The phase change energy storage unit includes a phase change energy storage container filled with phase change energy storage material and a phase change energy storage return water pipe and a phase change energy storage supply water pipe disposed outside the phase change energy storage container. The inlet pipe of the phase change energy storage container is connected to the phase change energy storage supply water pipe through a tee, and the outlet pipe of the phase change energy storage container is connected to the phase change energy storage return water pipe through a tee. A sixth valve and a tenth valve are disposed on the phase change energy storage return water pipe on both sides of the tee, and a seventh valve and an eleventh valve are disposed on the phase change energy storage supply water pipe on both sides of the tee. The tenth valve and the eleventh valve are respectively connected to the heat exchange medium inlet and heat exchange medium outlet of the outdoor heat exchanger of the secondary liquid cooler.

5. The air conditioning system with energy storage coupled to an air source heat pump according to claim 4, characterized in that, The water tank energy storage unit includes a water tank with a jacket, a first inlet pipe and a first outlet pipe communicating with the jacket on the water tank, and a second inlet pipe and a second outlet pipe communicating with the jacket on the water tank. The sixth valve is installed on the first inlet pipe, the seventh valve is installed on the first outlet pipe, the tenth valve is installed on the second inlet pipe, and the eleventh valve is installed on the second outlet pipe. The tenth valve and the eleventh valve are respectively connected to the heat exchange medium inlet and heat exchange medium outlet of the outdoor heat exchanger of the secondary liquid cooler.

6. The air conditioning system with energy storage coupled to an air source heat pump according to claim 3, characterized in that, The underground pipe energy storage unit includes a well, several U-shaped pipes installed inside the well, and backfill soil to fill the internal space of the well; It also includes a buried energy storage water supply pipe and a buried energy storage water return pipe installed outside the well. The buried energy storage water supply pipe is connected to the inlet of all U-shaped pipes through a tee, and the buried energy storage water return pipe is connected to the outlet of all U-shaped pipes through a tee. A sixth valve and a tenth valve are installed on the buried energy storage water supply pipe outside all the tee, and a seventh valve and an eleventh valve are installed on the buried energy storage water return pipe outside all the tee. The tenth valve and the eleventh valve are respectively connected to the heat exchange medium inlet and heat exchange medium outlet of the outdoor heat exchanger of the secondary liquid cooling room.

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