Air conditioning system and control method and control device therefor

Abstract

The present application relates to an air conditioning system and a control method and control device thereof, wherein the air conditioning system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, a storage container and a valve assembly, the storage container is in fluid communication with the compressor, the outdoor heat exchanger and the indoor heat exchanger, the valve assembly is connected with the compressor, the outdoor heat exchanger, the indoor heat exchanger and the storage container, the valve assembly is configured to control the flow direction of refrigerant and / or the on-off of the connecting pipeline, so as to adjust the state of the storage container and realize the switching between different working modes, the state of the storage container includes a closed state, a refrigerant storage state and a refrigerant release state. Through the operation of the valve assembly, the state of the storage container can be adjusted, and the switching between different working modes of the air conditioning system can be realized, so as to meet the diversified needs of users and improve the use experience of users.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly relates to an air conditioning system and a control method and a control device thereof. BACKGROUND

[0002] The defrosting of a multi-split air conditioner is a common problem in the air conditioning industry today. Frequent defrosting of the air conditioner can result in poor overall heating effect, and the indoor temperature decreases during the defrosting process, resulting in poor user comfort.

[0003] In order to solve the problem of air conditioner defrosting, there are many countermeasures at present. Among them, the system combined with the heat storage module defrosting gradually rises in the air conditioning industry, that is, heat storage is performed during heating operation, and heat release is performed during defrosting, so as to reduce the fluctuation of indoor temperature. However, the operation form of the heat storage module is relatively single, which cannot meet the diversified needs of users, and the pipeline design is complex, which causes bad experience for users.

[0004] It should be noted that the information disclosed in the background section of the present application is only intended to increase the understanding of the overall background of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. SUMMARY

[0005] The embodiments of the present application provide an air conditioning system and a control method and a control device thereof, which solve the problem that the air conditioning system in the related art cannot meet the diversified needs of users.

[0006] According to a first aspect of the present application, an air conditioning system is provided, comprising:

[0007] a compressor;

[0008] an outdoor heat exchanger;

[0009] an indoor heat exchanger;

[0010] a storage container in fluid communication with the compressor, the outdoor heat exchanger and the indoor heat exchanger; and

[0011] a valve assembly connected with the compressor, the outdoor heat exchanger, the indoor heat exchanger and the storage container, the valve assembly being configured to control the flow direction of the refrigerant and / or the on-off of the connecting pipeline, so as to adjust the state of the storage container and realize switching between different working modes of the air conditioning system, the state of the storage container including a closed state, a refrigerant storage state and a refrigerant release state.

[0012] In some embodiments, the air conditioning system further includes an energy accumulator, with a first end connected to the exhaust ports of the outdoor heat exchanger and the compressor, and a second end connected to the air inlets of the indoor heat exchanger and the compressor. A valve assembly is connected to the energy accumulator to regulate the state of the energy accumulator, which includes a non-working state, a cold energy storage state, a cold energy release state, a heat energy storage state, and a heat energy release state.

[0013] In some embodiments, the valve assembly includes a first control valve and a first throttling element, which are connected in parallel between a first end of the accumulator and an outdoor heat exchanger.

[0014] In some embodiments, the valve assembly includes a second control valve disposed on a connecting pipe between the indoor heat exchanger and a first connection point, the first connection point being located on a pipe connecting the outdoor heat exchanger to the first control valve and a first throttling element.

[0015] In some embodiments, the valve assembly includes a third control valve disposed on a connecting line between the first end of the accumulator and the exhaust port of the compressor.

[0016] In some embodiments, the valve assembly includes a fourth control valve disposed on a connecting line between the second end of the accumulator and the air inlet of the compressor.

[0017] In some embodiments, the valve assembly includes a second throttling element, a first end of which is connected to a second end of an accumulator, and a second end of which is connected to an indoor heat exchanger and an outdoor heat exchanger, respectively.

[0018] In some embodiments, the valve assembly includes a third throttling element disposed on the connecting pipe between the outdoor heat exchanger and the indoor heat exchanger.

[0019] In some embodiments, the valve assembly includes a four-way valve, which includes a first port, a second port, a third port and a fourth port. The first port is connected to the exhaust port of the compressor, the second port is connected to the outdoor heat exchanger, the third port is connected to the air inlet of the compressor, and the fourth port is connected to the indoor heat exchanger.

[0020] In some embodiments, the air conditioning system further includes a subcooler disposed between the outdoor heat exchanger and the indoor heat exchanger, and the subcooler is connected to the air inlet of the compressor.

[0021] In some embodiments, the valve assembly includes a fifth control valve, a sixth control valve, a seventh control valve, and an eighth control valve. The fifth control valve is connected between a first connecting pipe and a third connection port of the storage container. The first connecting pipe is a pipe that connects the outdoor heat exchanger to the indoor heat exchanger and the accumulator respectively. The sixth control valve is connected between a connecting pipe between the compressor's exhaust port and the first end of the accumulator and a second connection port of the storage container. The seventh control valve is connected between a connecting pipe between the second end of the accumulator and the compressor's inlet and a first connection port of the storage container. The eighth control valve is connected between a connecting pipe between the second end of the accumulator and the compressor's inlet and a second connection port of the storage container.

[0022] In some embodiments, the valve assembly further includes a fourth throttling element and a fifth throttling element, the fourth throttling element being connected between the seventh control valve and the first communication port of the storage container, and the fifth throttling element being connected between the eighth control valve and the second communication port of the storage container.

[0023] In some embodiments, the valve assembly includes a tenth control valve, a seventh throttling element, and an eleventh control valve. The tenth control valve is connected between a first connecting pipe and a fourth connection port of the storage container. The first connecting pipe is a pipe that connects the outdoor heat exchanger to the indoor heat exchanger and the accumulator respectively. The eleventh control valve is connected between a connecting pipe between the second end of the accumulator and the air inlet of the compressor and a fifth connection port of the storage container. The seventh throttling element is connected between the eleventh control valve and the fifth connection port of the storage container.

[0024] In some embodiments, the valve assembly includes a first control valve, a second control valve, a third control valve, a fourth control valve, a first throttling element, a second throttling element, a third throttling element, and a four-way valve. The first control valve and the first throttling element are connected in parallel between a first end of the accumulator and a first connection point. The first connection point is connected to an outdoor heat exchanger. The second control valve is disposed on a connecting pipe between the first connection point and an indoor heat exchanger. The third control valve is disposed on a connecting pipe between the first end of the accumulator and the exhaust port of the compressor. The fourth control valve is disposed on a connecting pipe between the second end of the accumulator and the inlet of the compressor. The first end of the second throttling element is connected to the second end of the accumulator. The second end of the second throttling element is connected to both the indoor heat exchanger and the outdoor heat exchanger. The third throttling element is disposed on a connecting pipe between the outdoor heat exchanger and the first connection point. The four-way valve includes a first interface, a second interface, a third interface, and a fourth interface. The first interface is connected to the exhaust port of the compressor. The second interface is connected to the outdoor heat exchanger. The third interface is connected to the inlet of the compressor. The fourth interface is connected to the indoor heat exchanger.

[0025] According to a second aspect of the present invention, a control method based on the above-described air conditioning system is provided, comprising:

[0026] Determine the operating mode of the air conditioning system;

[0027] The system controls the operation of valve components and the state of storage containers in the air conditioning system according to the preset control strategy and based on the working mode.

[0028] The present invention also provides a control method based on the above-described air conditioning system, comprising:

[0029] Determine the operating mode of the air conditioning system;

[0030] The system controls the operation of valve components, the state of accumulators, and the state of storage containers in the air conditioning system according to the preset control strategy and based on the working mode.

[0031] In some embodiments, determining the operating mode of the air conditioning system includes:

[0032] During periods of high electricity prices in the power supply system, the operating mode of the air conditioning system is determined to be either the mode in which the corresponding energy storage device is in a non-working state, a state of releasing cooling capacity, or a state of releasing heat capacity.

[0033] During periods of low electricity prices in the power supply system, the operating mode of the air conditioning system is determined to be either the non-operating state of the corresponding energy storage device, the state of storing cold energy, or the state of storing heat energy.

[0034] In some embodiments, determining the operating mode of the air conditioning system includes:

[0035] Check if there is energy stored in the energy storage device;

[0036] The operating mode of the air conditioning system is determined based on the test results.

[0037] According to a third aspect of the present invention, a control method for an air conditioning system based on the above-described method is provided, comprising:

[0038] Determine the operating mode of the air conditioning system;

[0039] According to the preset control strategy and based on the working mode, the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element and four-way valve in the air conditioning system, as well as the status of the outdoor heat exchanger, indoor heat exchanger, accumulator and storage container are controlled.

[0040] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0041] When the working mode is the normal cooling mode, the four-way valve is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0042] The second control valve is opened, while the first, third, and fourth control valves are all closed.

[0043] The first and second throttling elements are both closed, while the third throttling element is open and its opening size is adjustable; and

[0044] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0045] The indoor heat exchanger is used as an evaporator, the outdoor heat exchanger is used as a condenser, and the accumulator is turned off.

[0046] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0047] When the working mode is full cold storage mode, the four-way valve is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0048] The fourth control valve is opened, while the first, third, and second control valves are all closed.

[0049] The first throttling element is controlled to be in the open state with an adjustable opening size; the second throttling element is controlled to be in the closed state; and the third throttling element is controlled to be in the open state with an adjustable opening size; and

[0050] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0051] The indoor heat exchanger is shut down, the outdoor heat exchanger is used as a condenser, and the accumulator is used as an evaporator.

[0052] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0053] When the working mode is refrigeration and cold storage mode, the four-way valve is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0054] The fourth and second control valves are opened, while the first and third control valves are closed;

[0055] The first throttling element is controlled to be in the open state with an adjustable opening size; the second throttling element is controlled to be in the closed state; and the third throttling element is controlled to be in the open state with an adjustable opening size; and

[0056] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0057] The indoor heat exchanger is used as an evaporator, the outdoor heat exchanger is used as a condenser, and the accumulator is used as an evaporator.

[0058] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0059] When the working mode is subcooling and releasing the coolant, the four-way valve is de-energized, and the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0060] The first control valve is opened, while the third, fourth, and second control valves are closed.

[0061] Controlling the first throttling element to be closed, the second throttling element to be open, and the third throttling element to be open with an adjustable opening size; and

[0062] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0063] The indoor heat exchanger is used as an evaporator, the outdoor heat exchanger is used as a condenser, and the accumulator is used as a subcooler.

[0064] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0065] When the working mode is condensation and cooling mode, the four-way valve is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0066] The third control valve is opened, while the first, fourth, and second control valves are closed.

[0067] Control the first and third throttling elements to be in the closed state, and the second throttling element to be in the open state; and

[0068] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0069] The indoor heat exchanger is used as an evaporator, the outdoor heat exchanger is turned off, and the accumulator is used as a condenser.

[0070] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0071] When the working mode is parallel cooling mode, the four-way valve is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0072] Control the third and second control valves to open, and the first and fourth control valves to close; and

[0073] The first throttling element is controlled to be closed, while the second and third throttling elements are both open with adjustable opening sizes; and

[0074] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0075] The indoor heat exchanger is used as an evaporator, while the outdoor heat exchanger and accumulator are both used as condensers.

[0076] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0077] When the working mode is the normal heating mode, the four-way valve is energized, the first port is connected to the fourth port, and the second port is connected to the third port.

[0078] The second control valve is opened, while the first, third, and fourth control valves are closed.

[0079] Controlling the first and second throttling elements to be closed, and the third throttling element to be open with an adjustable opening size; and

[0080] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0081] The indoor heat exchanger is used as a condenser, the outdoor heat exchanger is used as an evaporator, and the accumulator is turned off.

[0082] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0083] When the working mode is full heat storage mode, the four-way valve is energized, the first port is connected to the fourth port, and the second port is connected to the third port.

[0084] The third and second control valves are opened, while the first and fourth control valves are closed;

[0085] Controlling the first throttling element to be closed, the second throttling element to be open, and the third throttling element to be open with an adjustable opening size; and

[0086] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0087] The indoor heat exchanger is shut down, the outdoor heat exchanger is used as an evaporator, and the accumulator is used as a condenser.

[0088] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0089] When the working mode is heating and heat storage mode, the four-way valve is energized, the first interface is connected to the fourth interface, and the second interface is connected to the third interface.

[0090] The third and second control valves are opened, while the first and fourth control valves are closed;

[0091] Controlling the first throttling element to be closed, the second throttling element to be open, and the third throttling element to be open with an adjustable opening size; and

[0092] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0093] The indoor heat exchanger is used as a condenser, the outdoor heat exchanger is used as an evaporator, and the accumulator is used as a condenser.

[0094] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0095] When the working mode is the mixed heat release mode, the four-way valve is energized, and the first port is connected to the fourth port, and the second port is connected to the third port.

[0096] The fourth and second control valves are opened, while the first and third control valves are closed;

[0097] The first and third throttling elements are both in the open state with adjustable opening sizes, while the second throttling element is in the closed state; and

[0098] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0099] The indoor heat exchanger is used as a condenser, the outdoor heat exchanger is used as an evaporator, and the accumulator is used as an evaporator.

[0100] In some embodiments, controlling the operation of the first control valve, second control valve, third control valve, fourth control valve, first throttling element, second throttling element, third throttling element, and four-way valve in the air conditioning system, as well as the state of the outdoor heat exchanger, indoor heat exchanger, accumulator, and storage container according to a preset control strategy and based on the operating mode, includes:

[0101] When the working mode is independent heat release mode, the four-way valve is energized, the first port is connected to the fourth port, and the second port is connected to the third port.

[0102] The fourth and second control valves are opened, while the first and third control valves are closed;

[0103] The first throttling element is controlled to be in the open state with an adjustable opening size, while the second and third throttling elements are both in the closed state; and

[0104] Control the state of the storage container to be closed, storing refrigerant, or releasing refrigerant;

[0105] The indoor heat exchanger is used as a condenser, the outdoor heat exchanger is turned off, and the accumulator is used as an evaporator.

[0106] In some embodiments, controlling the state of the storage container to be a closed state, a refrigerant-storing state, or a refrigerant-releasing state includes:

[0107] A valve assembly is provided, including a fifth control valve, a sixth control valve, a seventh control valve, and an eighth control valve. The fifth control valve is connected between a first connecting pipe and a third connection port of the storage container. The first connecting pipe is a pipe that connects the outdoor heat exchanger to the indoor heat exchanger and the accumulator respectively. The sixth control valve is connected between a connecting pipe between the compressor's exhaust port and the first end of the accumulator and a second connection port of the storage container. The seventh control valve is connected between a connecting pipe between the second end of the accumulator and the compressor's inlet and a first connection port of the storage container. The eighth control valve is connected between a connecting pipe between the second end of the accumulator and the compressor's inlet and a second connection port of the storage container.

[0108] Control the fifth, sixth, seventh, and eighth control valves to close, so that the storage container enters the closed state;

[0109] Control valves 5 and 8 to open, and valves 6 and 7 to close, so that the storage container enters the refrigerant storage state; or

[0110] The sixth and seventh control valves are opened, while the fifth and eighth control valves are closed, so that the storage container enters the refrigerant release state.

[0111] In some embodiments, controlling the state of the storage container to be a closed state, a refrigerant-storing state, or a refrigerant-releasing state includes:

[0112] A valve assembly including a tenth control valve and an eleventh control valve is provided. The tenth control valve is connected between a first connecting pipe and a fourth connection port of a storage container. The first connecting pipe is a pipe that connects an outdoor heat exchanger to an indoor heat exchanger and an accumulator respectively. The eleventh control valve is connected between a connecting pipe between the second end of the accumulator and the air inlet of the compressor and a fifth connection port of the storage container.

[0113] Control the tenth and eleventh control valves to close, so that the storage container enters the closed state;

[0114] Control the opening of the tenth and eleventh control valves to put the storage container into the refrigerant storage state; or

[0115] Control the tenth control valve to close and the eleventh control valve to open, so that the storage container enters the refrigerant release state.

[0116] According to a fourth aspect of the present invention, a control device for an air conditioning system is provided, comprising:

[0117] The memory is configured to store instructions;

[0118] The processor is coupled to the memory, and the processor is configured to implement the control method described above based on the execution of instructions stored in the memory.

[0119] According to a fifth aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions that, when executed by a processor, implement the control method described above.

[0120] Based on the above technical solution, the embodiments of the present invention can change the flow direction of refrigerant and / or adjust the on / off state of connecting pipes by operating the valve assembly, thereby adjusting the state of the storage container and realizing the switching of the air conditioning system between multiple different working modes; moreover, the storage container can be closed, can store refrigerant, and can also release the stored refrigerant, thus better meeting the diverse needs of users and improving the user experience. Attached Figure Description

[0121] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0122] Figure 1 This is a schematic diagram of the structure of some embodiments of the air conditioning system of the present invention.

[0123] Figure 2 This is a schematic diagram of refrigerant flow in a conventional refrigeration and refrigerant storage mode in some embodiments of the air conditioning system of the present invention.

[0124] Figure 3 This is a schematic diagram of refrigerant flow in a conventional refrigeration refrigerant release mode in some embodiments of the air conditioning system of the present invention.

[0125] Figure 4 This is a schematic diagram of refrigerant flow in a fully cold storage refrigerant mode according to some embodiments of the air conditioning system of the present invention.

[0126] Figure 5 This is a schematic diagram of refrigerant flow in a fully cold storage and refrigerant release mode according to some embodiments of the air conditioning system of the present invention.

[0127] Figure 6 This is a schematic diagram of refrigerant flow in some embodiments of the air conditioning system of the present invention under the refrigerant storage and cooling mode.

[0128] Figure 7 This is a schematic diagram of refrigerant flow in some embodiments of the air conditioning system of the present invention under the refrigerant release mode of refrigeration and cold storage.

[0129] Figure 8 This is a schematic diagram of refrigerant flow in some embodiments of the air conditioning system of the present invention under the subcooling release and storage refrigerant mode.

[0130] Figure 9This is a schematic diagram of refrigerant flow in the subcooling release refrigerant mode of some embodiments of the air conditioning system of the present invention.

[0131] Figure 10 This is a schematic diagram of refrigerant flow in some embodiments of the air conditioning system of the present invention under the condensation, release, and storage refrigerant mode.

[0132] Figure 11 This is a schematic diagram of refrigerant flow in the condensation and refrigerant release mode of some embodiments of the air conditioning system of the present invention.

[0133] Figure 12 This is a schematic diagram of refrigerant flow in some embodiments of the air conditioning system of the present invention under the parallel release and storage refrigerant mode.

[0134] Figure 13 This is a schematic diagram of refrigerant flow in parallel cooling and refrigerant release mode in some embodiments of the air conditioning system of the present invention.

[0135] Figure 14 This is a schematic diagram of refrigerant flow in a conventional heating and refrigerant storage mode in some embodiments of the air conditioning system of the present invention.

[0136] Figure 15 This is a schematic diagram of refrigerant flow in a conventional heating refrigerant release mode in some embodiments of the air conditioning system of the present invention.

[0137] Figure 16 This is a schematic diagram of refrigerant flow in a fully heat storage refrigerant mode according to some embodiments of the air conditioning system of the present invention.

[0138] Figure 17 This is a schematic diagram of refrigerant flow in a fully heat storage and refrigerant release mode according to some embodiments of the air conditioning system of the present invention.

[0139] Figure 18 This is a schematic diagram of refrigerant flow in some embodiments of the air conditioning system of the present invention under the heating, heat storage, and refrigerant storage mode.

[0140] Figure 19 This is a schematic diagram of refrigerant flow in some embodiments of the air conditioning system of the present invention under the refrigerant release mode of heating and heat storage.

[0141] Figure 20 This is a schematic diagram of refrigerant flow in a mixed heat release and storage refrigerant mode in some embodiments of the air conditioning system of the present invention.

[0142] Figure 21 This is a schematic diagram of refrigerant flow in a mixed heat release and refrigerant release mode in some embodiments of the air conditioning system of the present invention.

[0143] Figure 22 This is a schematic diagram of refrigerant flow in some embodiments of the air conditioning system of the present invention under independent heat release and storage refrigerant mode.

[0144] Figure 23 This is a schematic diagram of refrigerant flow in some embodiments of the air conditioning system of the present invention under independent heat release and refrigerant release mode.

[0145] Figure 24 This is a schematic diagram of the structure of some other embodiments of the air conditioning system of the present invention.

[0146] In the picture:

[0147] 1. Outdoor unit; 2. Energy storage equipment; 3. Liquid-side main pipe; 4. Gas-side main pipe;

[0148] 101. Compressor; 102. Oil separator; 103. Check valve; 104. Four-way valve; 105. Outdoor heat exchanger; 106. Third throttling element; 107. Sixth throttling element; 108. Ninth control valve; 109. Subcooler; 110. Gas-liquid separator;

[0149] 201. Accumulator; 202. First gas pipe; 203. Second gas pipe; 204. First liquid pipe; 205. Second liquid pipe; 206. First throttling device; 207. First control valve; 208. Third control valve; 209. Second throttling device; 210. Fourth control valve; 211. Second control valve;

[0150] 220, storage container; 220a, third connection port; 220b, second connection port; 220c, first connection port; 221, fifth control valve; 222, sixth control valve; 223, seventh control valve; 224, eighth control valve; 225, fourth throttling element; 226, fifth throttling element;

[0151] 220d, fourth connecting port; 220e, fifth connecting port; 227, tenth control valve; 228, seventh throttling element; 229, eleventh control valve;

[0152] 301. Indoor heat exchanger. Detailed Implementation

[0153] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0154] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0155] like Figure 1 As shown, in some embodiments of the air conditioning system provided by the present invention, the air conditioning system includes a compressor 101, an outdoor heat exchanger 105, an indoor heat exchanger 301, a storage container 220, and a valve assembly. The storage container 220 is connected to the compressor 101, the outdoor heat exchanger 105, and the indoor heat exchanger 301. The valve assembly is connected to the compressor 101, the outdoor heat exchanger 105, the indoor heat exchanger 301, and the storage container 220. The valve assembly is configured to control the flow direction of the refrigerant and / or the opening and closing of the connecting pipes to adjust the state of the storage container 220 and realize the switching of the air conditioning system between different operating modes. The state of the storage container 220 includes a closed state, a refrigerant-storing state, and a refrigerant-releasing state.

[0156] In the above embodiments, by operating the valve assembly, the flow direction of the refrigerant can be changed and / or the on / off state of the connecting pipe can be adjusted to regulate the state of the storage container 220 and realize the switching of the air conditioning system between multiple different operating modes. Moreover, the storage container 220 can be closed, can store refrigerant, and can also release the stored refrigerant, thus better meeting the diverse needs of users and improving the user experience.

[0157] In other embodiments of the air conditioning system provided by the present invention, the air conditioning system includes a compressor 101, an outdoor heat exchanger 105, an indoor heat exchanger 301, an accumulator 201, a storage container 220, and a valve assembly. The first end of the accumulator 201 is connected to the exhaust ports of the outdoor heat exchanger 105 and the compressor 101, respectively. The second end of the accumulator 201 is connected to the air inlets of the indoor heat exchanger 301 and the compressor 101, respectively. The storage container 220 is connected to the compressor 101, the outdoor heat exchanger 105, the indoor heat exchanger 301, and the accumulator 201. The valve assembly... Connected to compressor 101, outdoor heat exchanger 105, indoor heat exchanger 301, accumulator 201, and storage container 220, the valve assembly is configured to control the flow direction of refrigerant and / or the opening and closing of connecting pipes to adjust the state of accumulator 201 and storage container 220, and to realize the switching of the air conditioning system between different operating modes. The states of accumulator 201 include non-operating state, cold storage state, cold release state, heat storage state, and heat release state. The states of storage container 220 include closed state, refrigerant storage state, and refrigerant release state.

[0158] In the above embodiments, by operating the valve assembly, the flow direction of the refrigerant and / or the opening and closing of the connecting pipes can be changed to adjust the state of the accumulator 201 and the storage container 220, and to realize the switching of the air conditioning system between multiple different operating modes. Moreover, the accumulator 201 has a non-working state, a cold energy storage state, a cold energy release state, a heat energy storage state, and a heat energy release state. That is, the accumulator 201 can participate in operation or not. When participating in operation, it can both store and release cold energy, and it can both store and release heat energy. The storage container 220 can be closed, can store refrigerant, and can also release the stored refrigerant. Therefore, it can better meet the diverse needs of users and improve the user experience.

[0159] This invention addresses the problem of poor heat exchange caused by inconsistent refrigerant demand under different operating modes. By storing and releasing refrigerant in a storage container, the amount of refrigerant in different operating modes is controlled, ensuring that the amount of refrigerant circulating in the system matches the refrigerant demand in each mode, thus achieving optimal heat exchange performance.

[0160] like Figure 1 As shown, in some embodiments, the valve assembly includes a first control valve 207 and a first throttling element 206, which are connected in parallel between the first end of the accumulator 201 and the outdoor heat exchanger 105.

[0161] By setting a first control valve 207 and a first throttling element 206 connected in parallel, two connection methods can be realized between the first end of the outdoor heat exchanger 105 and the first end of the accumulator 201. When the outdoor heat exchanger 105 and the first end of the accumulator 201 are connected through the first control valve 207, the refrigerant flowing out of the outdoor heat exchanger 105 can directly enter the accumulator 201 in an outflow state, and the refrigerant can achieve further subcooling in the accumulator 201. When the outdoor heat exchanger 105 and the first end of the accumulator 201 are connected through the first throttling element 206, the refrigerant flowing out of the outdoor heat exchanger 105 can flow into the accumulator 201 after throttling, so as to achieve the purpose of cold storage.

[0162] In some embodiments, the valve assembly includes a second control valve 211 disposed on a connecting pipe between the indoor heat exchanger 301 and a first connection point, the first connection point being located on a pipe connecting the outdoor heat exchanger 105 to the first control valve 207 and the first throttling element 206.

[0163] By setting the second control valve 211, the connection between the indoor heat exchanger 301 and the first connection point can be switched on and off. The first connection point is connected to the outdoor heat exchanger 105, so the connection between the indoor heat exchanger 301 and the outdoor heat exchanger 105 and the connection between the indoor heat exchanger 301 and the accumulator 201 can be switched on and off.

[0164] In some embodiments, the valve assembly includes a third control valve 208 disposed on a connecting line between the first end of the accumulator 201 and the exhaust port of the compressor 101.

[0165] By setting a third control valve 208, the connection between the first end of the accumulator 201 and the exhaust port of the compressor 101 can be switched on or off. When the first end of the accumulator 201 is connected to the exhaust port of the compressor 101, the exhaust gas from the compressor 101 can directly enter the accumulator 201, realizing the heat storage function of the accumulator 201.

[0166] In some embodiments, the valve assembly includes a fourth control valve 210 disposed on a connecting line between the second end of the accumulator 201 and the air inlet of the compressor 101.

[0167] By setting the fourth control valve 210, the connection between the second end of the accumulator 201 and the air inlet of the compressor 101 can be switched on or off. When the second end of the accumulator 201 is connected to the air inlet of the compressor 101, the refrigerant flowing out from the second end of the accumulator 201 can flow back to the compressor 101, completing the cycle after cold storage or heat release.

[0168] In some embodiments, the valve assembly includes a second throttling element 209, a first end of which is connected to a second end of an accumulator 201, and a second end of which is connected to an indoor heat exchanger 301 and an outdoor heat exchanger 105, respectively.

[0169] By setting the second throttling element 209, the connection between the second end of the accumulator 201 and the indoor heat exchanger 301 or the outdoor heat exchanger 105 can be switched on or off. When the second end of the accumulator 201 is connected to the indoor heat exchanger 301, the refrigerant in the accumulator 201 can flow to the indoor heat exchanger 301 for heat absorption and evaporation; while when the second end of the accumulator 201 is connected to the outdoor heat exchanger 105, the refrigerant in the accumulator 201 can flow to the outdoor heat exchanger 105, thus realizing the heat storage function.

[0170] In some embodiments, the valve assembly includes a third throttling element 106 disposed on the connecting pipe between the outdoor heat exchanger 105 and the indoor heat exchanger 301.

[0171] By setting the third throttling element 106, the throttling effect can be achieved in the heating mode, or the connecting pipeline between the accumulator 201 and the outdoor heat exchanger 105 can be cut off in the condensation and heat release mode or the independent heat release mode.

[0172] In some embodiments, the valve assembly includes a four-way valve 104, which includes a first port, a second port, a third port and a fourth port. The first port is connected to the exhaust port of the compressor 101, the second port is connected to the outdoor heat exchanger 105, the third port is connected to the air inlet of the compressor 101, and the fourth port is connected to the indoor heat exchanger 301.

[0173] By setting up a four-way valve 104, switching between connecting pipes can be achieved, providing support for different operating modes of the air conditioning system.

[0174] In some embodiments, the valve assembly includes a fifth control valve 221, a sixth control valve 222, a seventh control valve 223, and an eighth control valve 224. The fifth control valve 221 is connected between a first connecting pipe and the third communication port 220a of the storage container 220. The first connecting pipe is a pipe that connects the outdoor heat exchanger 105 to the indoor heat exchanger 301 and the accumulator 201 respectively. The sixth control valve 222 is connected between the connecting pipe between the exhaust port of the compressor 101 and the first end of the accumulator 201 and the second communication port 220b of the storage container 220. The seventh control valve 223 is connected between the connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101 and the first communication port 220c of the storage container 220. The eighth control valve 224 is connected between the connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101 and the second communication port 220b of the storage container 220.

[0175] By setting the fifth control valve 221, the sixth control valve 222, the seventh control valve 223 and the eighth control valve 224, the storage container 220 can be switched between the storage state and the release state.

[0176] In some embodiments, the valve assembly further includes a fourth throttling element 225 and a fifth throttling element 226, the fourth throttling element 225 being connected between the seventh control valve 223 and the first communication port 220c of the storage container 220, and the fifth throttling element 226 being connected between the eighth control valve 224 and the second communication port 220b of the storage container 220.

[0177] The fourth throttling element 225 and the fifth throttling element 226 can be throttling elements such as electronic expansion valves or capillary tubes.

[0178] like Figure 1 As shown, the storage container 220 has a first connection port 220c, a second connection port 220b, and a third connection port 220a. The first connection port 220c is located at the lower part of the storage container 220, while the second and third connection ports 220b and 220a are located at the upper part of the storage container 220. The third connection port 220a serves as an inlet connected to the fifth control valve 221; the second connection port 220b can serve as either an inlet connected to the sixth control valve 222 or an outlet connected to the eighth control valve 224; and the first connection port 220c serves as an outlet connected to the seventh control valve 223.

[0179] In other embodiments, the storage container 220 may also be provided with four communication ports, which are respectively connected to the fifth control valve 221, the sixth control valve 222, the seventh control valve 223 and the eighth control valve 224.

[0180] In some other embodiments, the valve assembly includes a tenth control valve 227 and an eleventh control valve 229. The tenth control valve 227 is connected between a first connecting pipe and a fourth connection port 220d of the storage container 220. The first connecting pipe is a pipe that connects the outdoor heat exchanger 105 to the indoor heat exchanger 301 and the accumulator 201 respectively. The eleventh control valve 229 is connected between a connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101 and a fifth connection port 220e of the storage container 220.

[0181] By setting the tenth control valve 227 and the eleventh control valve 229, the storage container 220 can be switched between the storage state and the release state.

[0182] In some embodiments, the valve assembly further includes a seventh throttling element 228, which is connected between the eleventh control valve 229 and the fifth communication port 220e of the storage container 220.

[0183] The seventh throttling element 228 can be an electronic expansion valve or a capillary tube, etc.

[0184] like Figure 24 As shown, the storage container 220 has a fourth connection port 220d and a fifth connection port 220e. The fourth connection port 220d is located at the lower part of the storage container 220, and the fifth connection port 220e is located at the upper part of the storage container 220. The fourth connection port 220d serves as an inlet and is connected to the tenth control valve 227, while the fifth connection port 220e serves as an outlet and is connected to the eleventh control valve 229.

[0185] In some embodiments, the air conditioning system further includes a subcooler 109 disposed between the outdoor heat exchanger 105 and the indoor heat exchanger 301, and the subcooler 109 is connected to the air inlet of the compressor 101. By providing the subcooler 109, the cooling capacity of the air conditioning system can be increased.

[0186] In some embodiments, the air conditioning system further includes a sixth throttling element 107, wherein the third throttling element 106 is disposed on the connecting pipe between the outdoor heat exchanger 105 and the subcooler 109, and the sixth throttling element 107 is disposed on the connecting pipe between the third throttling element 106 and the port of the subcooler 109 that connects to the air inlet of the compressor 101.

[0187] In some embodiments, the air conditioning system further includes a ninth control valve 108, which is connected between the subcooler 109 and a second connection point, the second connection point being connected to the third interface of the four-way valve 104 and the air inlet of the compressor 101, respectively.

[0188] In some embodiments, the air conditioning system further includes a gas-liquid separator 110 connected to the air inlet of the compressor 101. Optionally, all components connected to the air inlet of the compressor 101 are first connected to the inlet of the gas-liquid separator 110, and then separated by the gas-liquid separator 110 before being connected to the air inlet of the compressor 101.

[0189] By installing the gas-liquid separator 110, the amount of liquid entering the compressor 101 can be reduced, thus preventing liquid slugging.

[0190] In some embodiments, the air conditioning system further includes an oil separator 102 connected to the exhaust port of the compressor 101, wherein the exhaust of the compressor 101 is first separated by the oil separator 102 before being connected to other components connected to the exhaust port of the compressor 101.

[0191] By setting up an oil separator 102, the lubricating oil in the exhaust of the compressor 101 can be separated in a timely manner, preventing the refrigerant in the subsequent circulation from still containing impurities such as lubricating oil, and also enabling the recycling of lubricating oil.

[0192] In some embodiments, the air conditioning system further includes a one-way valve 103 connected to the exhaust port of the compressor 101. The inlet of the one-way valve 103 is connected to the exhaust port of the compressor 101, and the outlet of the one-way valve 103 is connected to the first end of the accumulator 201 and the first interface of the four-way valve 104, respectively.

[0193] By setting a one-way valve 103, refrigerant backflow can be prevented.

[0194] In some embodiments, the inlet of the one-way valve 103 is connected to the outlet of the oil separator 102.

[0195] In some embodiments, the connecting pipe between the exhaust port of the compressor 101 and the first end of the accumulator 201 is a first air pipe 202, the connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101 is a second air pipe 203, the first end of the accumulator 201 is connected to a first liquid pipe 204, and the second end of the accumulator 201 is connected to a second liquid pipe 205.

[0196] In some embodiments, the valve assembly includes a first control valve 207, a second control valve 211, a third control valve 208, a fourth control valve 210, a first throttling element 206, a second throttling element 209, a third throttling element 206, and a four-way valve 104. The first control valve 207 and the first throttling element 206 are connected in parallel between a first end of the accumulator 201 and a first connection point. The first connection point communicates with the outdoor heat exchanger 105. The second control valve 211 is disposed on the connecting pipe between the first connection point and the indoor heat exchanger 301. The third control valve 208 is disposed on the connecting pipe between the first end of the accumulator 201 and the exhaust port of the compressor 101. The fourth control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the fourth control valve 210, the fourth control valve 210, the fifth control valve 209, the sixth control valve 200, the seventh control valve 200, the tug-of-war ... A third throttling element 106 is provided on the connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101. The first end of the second throttling element 209 is connected to the second end of the accumulator 201. The second end of the second throttling element 209 is connected to the indoor heat exchanger 301 and the outdoor heat exchanger 105 respectively. The third throttling element 106 is provided on the connecting pipe between the outdoor heat exchanger 105 and the first connection point. The four-way valve 104 includes a first interface, a second interface, a third interface and a fourth interface. The first interface is connected to the exhaust port of the compressor 101, the second interface is connected to the outdoor heat exchanger 105, the third interface is connected to the air inlet of the compressor 101, and the fourth interface is connected to the indoor heat exchanger 301.

[0197] like Figure 1As shown, in some embodiments, the valve assembly includes a first control valve 207, a second control valve 211, a third control valve 208, a fourth control valve 210, a fifth control valve 221, a sixth control valve 222, a seventh control valve 223, an eighth control valve 224, a first throttling element 206, a second throttling element 209, a third throttling element 206, a fifth throttling element 225, a sixth throttling element 226, and a four-way valve 104. The first control valve 207 and the first throttling element 206 are connected in parallel between the first end of the accumulator 201 and the first connection point. The first connection point is connected to the outdoor heat exchanger 105. The second control valve 211 is disposed in... A third control valve 208 is located on the connecting pipe between the first connection point and the indoor heat exchanger 301, and a fourth control valve 210 is located on the connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101. The first end of the second throttling element 209 is connected to the second end of the accumulator 201, and the second end of the second throttling element 209 is connected to both the indoor heat exchanger 301 and the outdoor heat exchanger 105. A third throttling element 106 is located on the connecting pipe between the outdoor heat exchanger 105 and the first connection point. The four-way valve 104 includes a first connection point. The system comprises four interfaces: a first interface, a second interface, a third interface, and a fourth interface. The first interface is connected to the exhaust port of the compressor 101; the second interface is connected to the outdoor heat exchanger 105; the third interface is connected to the air inlet of the compressor 101; and the fourth interface is connected to the indoor heat exchanger 301. A fifth control valve 221 is connected between the first connecting pipe and the third connecting port 220a of the storage container 220. The first connecting pipe is the pipe connecting the outdoor heat exchanger 105 to the indoor heat exchanger 301 and the accumulator 201 respectively. A sixth control valve 222 is connected between the connecting pipe between the exhaust port of the compressor 101 and the first end of the accumulator 201 and the third connecting port 220a of the storage container 220. Between the two connecting ports 220b, the seventh control valve 223 is connected between the connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101 and the first connecting port 220c of the storage container 220; the eighth control valve 224 is connected between the connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101 and the second connecting port 220b of the storage container 220; the fourth throttling element 225 is connected between the seventh control valve 223 and the first connecting port 220c of the storage container 220; and the fifth throttling element 226 is connected between the eighth control valve 224 and the second connecting port 220b of the storage container 220.

[0198] The end of the fifth control valve 221 furthest from the storage container 220 is connected to the connecting pipe between the first connection point and the outdoor heat exchanger 105. The end of the sixth control valve 222 furthest from the storage container 220 is connected to the connecting pipe between the third control valve 208 and the exhaust port of the compressor 101. The end of the seventh control valve 223 furthest from the storage container 220 is connected to the connecting pipe between the fourth control valve 210 and the air inlet of the compressor 101. The end of the eighth control valve 224 furthest from the storage container 220 is connected to the connecting pipe between the fourth control valve 210 and the air inlet of the compressor 101.

[0199] like Figure 24 As shown, in some embodiments, the valve assembly includes a first control valve 207, a second control valve 211, a third control valve 208, a fourth control valve 210, a tenth control valve 227, an eleventh control valve 229, a first throttling element 206, a second throttling element 209, a third throttling element 206, a seventh throttling element 228, and a four-way valve 104. The first control valve 207 and the first throttling element 206 are connected in parallel between the first end of the accumulator 201 and a first connection point. The first connection point is connected to the outdoor environment. Heat exchanger 105 is connected. A second control valve 211 is installed on the connecting pipe between the first connection point and the indoor heat exchanger 301. A third control valve 208 is installed on the connecting pipe between the first end of the accumulator 201 and the exhaust port of the compressor 101. A fourth control valve 210 is installed on the connecting pipe between the second end of the accumulator 201 and the inlet of the compressor 101. The first end of a second throttling element 209 is connected to the second end of the accumulator 201, and the second end of the second throttling element 209 is connected to both the indoor heat exchanger 301 and the outdoor heat exchanger 105. A third throttling element 106 is installed on the connecting pipe between the outdoor heat exchanger 105 and the first connection point. A four-way valve 104 includes a first port, a second port, a third port, and a fourth port. The first port is connected to the exhaust port of the compressor 101, the second port is connected to the outdoor heat exchanger 105, the third port is connected to the inlet of the compressor 101, and the fourth port is connected to the indoor heat exchanger 301. A tenth control valve 227 is connected to the first connection point. Between the pipeline and the fourth connection port 220d of the storage container 220, the first connecting pipeline is the pipeline connecting the outdoor heat exchanger 105 to the indoor heat exchanger 301 and the accumulator 201 respectively. The eleventh control valve 229 is connected between the connecting pipeline between the second end of the accumulator 201 and the air inlet of the compressor 101 and the fifth connection port 220e of the storage container 220. The seventh throttling element 228 is connected between the eleventh control valve 229 and the fifth connection port 220e of the storage container 220.

[0200] The end of the tenth control valve 227 furthest from the storage container 220 is connected to the connecting pipe between the first connection point and the outdoor heat exchanger 105. The end of the eleventh control valve 229 furthest from the storage container 220 is connected to the connecting pipe between the fourth control valve 210 and the air inlet of the compressor 101.

[0201] In some embodiments of the air conditioning system provided by the present invention, the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the fifth control valve 221, the sixth control valve 222, the seventh control valve 223, the eighth control valve 224, the ninth control valve 108, the tenth control valve 227, and the eleventh control valve 229 can be on / off valves or proportional valves, etc.

[0202] In some embodiments of the air conditioning system provided by the present invention, the first throttling element 206, the second throttling element 209, the third throttling element 106 and the sixth throttling element 107 may be electronic expansion valves, etc.

[0203] In some embodiments of the air conditioning system provided by the present invention, the storage container 220 may be a container with the ability to store and release refrigerant, such as a liquid storage tank.

[0204] The storage container 220 is used to address the different refrigerant requirements under various operating modes of the air conditioning system. When the refrigerant requirement is low, it can be stored in the storage container; when the refrigerant requirement is high, it can be replenished by releasing the refrigerant stored in the storage container.

[0205] In unconventional cooling and heating operations, the accumulator itself acts as an evaporator or condenser, requiring refrigerant circulation for heat exchange. In conventional cooling and heating, the circulating refrigerant does not pass through the accumulator, which can then store a portion of the refrigerant. Furthermore, the primary function of the accumulator is heat exchange; its design volume is related to the heat exchange demand, resulting in a limited volume. Since its internal structure consists entirely of refrigerant pipes, the amount of refrigerant stored and released by the accumulator is also limited. In contrast, storage containers (such as liquid receivers) can be designed with a volume based on the difference between the maximum and minimum required circulation volume of the air conditioning system, offering significant advantages over accumulators. Moreover, the amount of refrigerant required can be adjusted through liquid inlet and outlet controls, making it simpler and easier to operate.

[0206] The air conditioning system provided by this invention can achieve at least 11 operating modes by adjusting the state of the valve assembly, including conventional cooling, complete cold storage, cooling and cold storage, subcooling and cold release, condensation and cold release, parallel cold release, conventional heating, complete heat storage, heating and heat storage, mixed heat release, and independent heat release. Furthermore, in each operating mode, the storage container 220 can have a closed state, a refrigerant storage state, or a refrigerant release state to meet different user needs, thereby broadening the application range of the air conditioning system and greatly improving its availability. Moreover, the air conditioning system designed in this invention features simplified piping and lower costs.

[0207] Based on the above-described air conditioning system, the present invention also provides a control method for the air conditioning system, comprising:

[0208] Determine the operating mode of the air conditioning system;

[0209] The valve components and storage container 220 in the air conditioning system are controlled according to the preset control strategy and based on the working mode.

[0210] The present invention also provides a control method for an air conditioning system, comprising:

[0211] Determine the operating mode of the air conditioning system;

[0212] The system controls the operation of valve components, the state of accumulator 201, and the state of storage container 220 in the air conditioning system according to the preset control strategy and based on the working mode.

[0213] Currently, in order to conserve electricity resources, many cities have adopted time-of-use pricing policies. For example, during peak electricity consumption periods, the price is higher to raise people's awareness of saving electricity; during off-peak periods, the price is lower to guide people to use electricity resources during off-peak hours and avoid putting too much pressure on the power supply system.

[0214] Therefore, in some embodiments of the control method provided by the present invention, determining the operating mode of the air conditioning system includes:

[0215] During periods when the power supply system has high electricity prices, the operating mode of the air conditioning system is determined to be either the non-operating state of the corresponding energy storage unit 201, the state of releasing cooling capacity, or the state of releasing heat capacity.

[0216] During periods when the power supply system operates at low electricity prices, the operating mode of the air conditioning system is determined to be either the non-operating state of the corresponding energy storage unit 201, the state of storing cold energy, or the state of storing heat energy.

[0217] By determining the operating mode of the air conditioning system based on the electricity price of the power supply system, the energy storage unit 201 can store cooling or heating energy during periods of low electricity price. During periods of high electricity price, the air conditioning system can be set to a mode where the corresponding energy storage unit 201 is in a non-working state, a cooling energy release state, or a heating energy release state. This allows the energy storage unit 201 to store the heat or cooling energy in advance to achieve the purpose of cooling or heating, reduce the operating frequency of the compressor 101, reduce the power consumption of the air conditioning system during periods of high electricity price, and reduce the economic burden on users. It also helps to achieve peak-shifting of electricity use and reduce the power supply pressure on the power supply system.

[0218] In some embodiments, the air conditioning system can determine its operating mode based on the user's current needs, or it can automatically determine its operating mode based on pre-stored power supply system pricing standards.

[0219] In some embodiments, determining the operating mode of the air conditioning system includes:

[0220] Check whether there is energy stored in the energy storage device 201;

[0221] The operating mode of the air conditioning system is determined based on the test results.

[0222] In some embodiments, determining the operating mode of the air conditioning system based on the detection results includes:

[0223] When no energy is detected in the energy storage unit 201, the operating mode of the air conditioning system is determined to be the mode in which the corresponding energy storage unit 201 is in a non-working state, a heat storage state, or a cold storage state.

[0224] When energy is detected in the energy storage unit 201, the operating mode of the air conditioning system can be determined according to the needs, which corresponds to the energy storage unit 201 being in a non-working state, a heat storage state, a cold storage state, a heat release state, or a cold release state.

[0225] When using the energy in the energy storage unit 201, the energy balance in the energy storage unit 201 is detected in real time. When the energy balance is detected to be close to zero, the use of the energy in the energy storage unit 201 is stopped.

[0226] Similarly, the same operations can be performed on storage container 220 as on accumulator 201, for example:

[0227] When it is detected that there is no refrigerant in the storage container 220, the state of the storage container 220 is determined to be the closed state and the refrigerant storage state;

[0228] When refrigerant is detected in storage container 220, the state of storage container 220 can be determined as closed, storing refrigerant, or releasing refrigerant, depending on the requirements.

[0229] When the storage container 220 is in the refrigerant release state, the refrigerant level in the storage container 220 is monitored in real time. When the refrigerant level is detected to be close to zero, the refrigerant release is stopped.

[0230] Based on the above-described air conditioning system, the present invention also provides a control method for the air conditioning system, comprising:

[0231] Determine the operating mode of the air conditioning system;

[0232] According to the preset control strategy and based on the working mode, the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106 and the four-way valve 104 in the air conditioning system, as well as the status of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201 and the storage container 220 are controlled.

[0233] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0234] When the working mode is the normal cooling mode, the four-way valve 104 is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0235] The second control valve 211 is opened, while the first control valve 207, the third control valve 208, and the fourth control valve 210 are all closed.

[0236] The first throttling element 206 and the second throttling element 209 are both in the closed state, while the third throttling element 106 is in the open state with an adjustable opening size; and

[0237] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0238] In this system, the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is turned off.

[0239] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0240] When the working mode is full cold storage mode, the four-way valve 104 is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0241] The fourth control valve 210 is opened, while the first control valve 207, the third control valve 208, and the second control valve 211 are all closed.

[0242] The first throttling element 206 is controlled to be in the open state with an adjustable opening size; the second throttling element 209 is controlled to be in the closed state; and the third throttling element 106 is controlled to be in the open state with an adjustable opening size; and

[0243] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0244] In this system, the indoor heat exchanger 301 is turned off, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as an evaporator.

[0245] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0246] When the working mode is refrigeration and cold storage mode, the four-way valve 104 is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0247] The fourth control valve 210 and the second control valve 211 are opened, while the first control valve 207 and the third control valve 208 are closed.

[0248] The first throttling element 206 is controlled to be in the open state with an adjustable opening size; the second throttling element 209 is controlled to be in the closed state; and the third throttling element 106 is controlled to be in the open state with an adjustable opening size; and

[0249] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0250] Among them, the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as an evaporator.

[0251] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0252] When the working mode is subcooling and releasing, the four-way valve 104 is de-energized, and the first port is connected to the second port, and the third port is connected to the fourth port.

[0253] The first control valve 207 is opened, while the third control valve 208, the fourth control valve 210, and the second control valve 211 are closed.

[0254] The first throttling element 206 is controlled to be closed, the second throttling element 209 is controlled to be open, and the third throttling element 106 is controlled to be open with an adjustable opening size; and

[0255] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0256] Among them, the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as a subcooler.

[0257] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0258] When the working mode is condensation and cooling mode, the four-way valve 104 is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0259] The third control valve 208 is opened, while the first control valve 207, the fourth control valve 210, and the second control valve 211 are closed.

[0260] Controlling the first throttling element 206 and the third throttling element 106 to be in the closed state, and the second throttling element 209 to be in the open state; and

[0261] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0262] In this system, the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is closed, and the accumulator 201 is used as a condenser.

[0263] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0264] When the working mode is parallel cooling mode, the four-way valve 104 is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0265] Controls the opening of the third control valve 208 and the second control valve 211, and the closing of the first control valve 207 and the fourth control valve 210; and

[0266] The first throttling element 206 is controlled to be closed, while the second throttling element 209 and the third throttling element 106 are both open and their opening sizes are adjustable; and

[0267] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0268] In this system, the indoor heat exchanger 301 is used as an evaporator, while the outdoor heat exchanger 105 and the accumulator 201 are both used as condensers.

[0269] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0270] When the working mode is the normal heating mode, the four-way valve 104 is energized, and the first port is connected to the fourth port, and the second port is connected to the third port.

[0271] The second control valve 211 is opened, and the first control valve 207, the third control valve 208, and the fourth control valve 210 are closed.

[0272] The first throttling element 206 and the second throttling element 209 are controlled to be in a closed state, and the third throttling element 106 is in an open state with an adjustable opening size; and

[0273] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0274] In this system, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is turned off.

[0275] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0276] When the working mode is full heat storage mode, the four-way valve 104 is energized, the first port is connected to the fourth port, and the second port is connected to the third port.

[0277] The third control valve 208 and the second control valve 211 are opened, while the first control valve 207 and the fourth control valve 210 are closed.

[0278] The first throttling element 206 is controlled to be closed, the second throttling element 209 is controlled to be open, and the third throttling element 106 is controlled to be open with an adjustable opening size; and

[0279] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0280] In this system, the indoor heat exchanger 301 is turned off, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is used as a condenser.

[0281] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0282] When the working mode is heating and heat storage mode, the four-way valve 104 is energized, the first port is connected to the fourth port, and the second port is connected to the third port.

[0283] The third control valve 208 and the second control valve 211 are opened, while the first control valve 207 and the fourth control valve 210 are closed.

[0284] The first throttling element 206 is controlled to be closed, the second throttling element 209 is controlled to be open, and the third throttling element 106 is controlled to be open with an adjustable opening size; and

[0285] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0286] Among them, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is used as a condenser.

[0287] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0288] When the working mode is the mixed heat release mode, the four-way valve 104 is energized, the first port is connected to the fourth port, and the second port is connected to the third port.

[0289] The fourth control valve 210 and the second control valve 211 are opened, while the first control valve 207 and the third control valve 208 are closed.

[0290] The first throttling element 206 and the third throttling element 106 are both in the open state with adjustable opening sizes, while the second throttling element 209 is in the closed state; and

[0291] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0292] Among them, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is used as an evaporator.

[0293] In some embodiments, controlling the operation of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttling element 206, the second throttling element 209, the third throttling element 106, and the four-way valve 104 in the air conditioning system, as well as the state of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operating mode, includes:

[0294] When the working mode is independent heat release mode, the four-way valve 104 is energized, the first port is connected to the fourth port, and the second port is connected to the third port.

[0295] The fourth control valve 210 and the second control valve 211 are opened, while the first control valve 207 and the third control valve 208 are closed.

[0296] The first throttling element 206 is controlled to be in the open state with an adjustable opening size, while the second throttling element 209 and the third throttling element 106 are both in the closed state; and

[0297] The state of the storage container 220 is controlled to be either closed, storing refrigerant, or releasing refrigerant.

[0298] In this system, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is closed, and the accumulator 201 is used as an evaporator.

[0299] In some embodiments, controlling the state of the storage container 220 to be a closed state, a refrigerant storage state, or a refrigerant release state includes:

[0300] A valve assembly is provided, including a fifth control valve 221, a sixth control valve 222, a seventh control valve 223, and an eighth control valve 224. The fifth control valve 221 is connected between a first connecting pipe and a third connection port 220a of a storage container 220. The first connecting pipe is a pipe that connects the outdoor heat exchanger 105 to the indoor heat exchanger 301 and the accumulator 201 respectively. The sixth control valve 222 is connected between a connecting pipe between the exhaust port of the compressor 101 and the first end of the accumulator 201 and a second connection port 220b of the storage container 220. The seventh control valve 223 is connected between a connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101 and a first connection port 220c of the storage container 220. The eighth control valve 224 is connected between a connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101 and a second connection port 220b of the storage container 220.

[0301] The fifth control valve 221, the sixth control valve 222, the seventh control valve 223, and the eighth control valve 224 are closed to bring the storage container 220 into a closed state.

[0302] Controlling the fifth control valve 221 and the eighth control valve 224 to open, and the sixth control valve 222 and the seventh control valve 223 to close, so that the storage container 220 enters the refrigerant storage state; or

[0303] The sixth control valve 222 and the seventh control valve 223 are opened, and the fifth control valve 221 and the eighth control valve 224 are closed, so that the storage container 220 enters the refrigerant release state.

[0304] In some embodiments, controlling the state of the storage container 220 to be a closed state, a refrigerant storage state, or a refrigerant release state includes:

[0305] A valve assembly including a tenth control valve 227 and an eleventh control valve 229 is provided. The tenth control valve 227 is connected between a first connecting pipe and a fourth connection port 220d of a storage container 220. The first connecting pipe is a pipe that connects an outdoor heat exchanger 105 to an indoor heat exchanger 301 and an accumulator 201 respectively. The eleventh control valve 229 is connected between a connecting pipe between the second end of the accumulator 201 and the air inlet of the compressor 101 and a fifth connection port 220e of the storage container 220.

[0306] Control the tenth control valve 227 and the eleventh control valve 229 to close, so that the storage container 220 enters the closed state;

[0307] Control the opening of the tenth control valve 227 and the eleventh control valve 229 to allow the storage container 220 to enter the refrigerant storage state; or

[0308] Control the tenth control valve 227 to close and the eleventh control valve 229 to open, so that the storage container 220 enters the refrigerant release state.

[0309] The present invention also provides a control device for an air conditioning system, comprising:

[0310] The memory is configured to store instructions;

[0311] The processor is coupled to the memory, and the processor is configured to implement the control method described above based on the execution of instructions stored in the memory.

[0312] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, which, when executed by a processor, implement the above-described control method.

[0313] The following is in conjunction with the appendix Figures 1 to 24 The working process of the air conditioning system provided by this invention is described below:

[0314] like Figure 1 As shown, the air conditioning system includes an outdoor unit 1, an energy storage device 2, and an indoor unit.

[0315] The compressor 101 outlet of outdoor unit 1 is sequentially connected to oil separator 102, check valve 103, and four-way valve 104. Four-way valve 104 can be connected to outdoor heat exchanger 105. Outdoor heat exchanger 105 is connected to third throttling device 106. One path of third throttling device 106 passes through cooler 109 and is connected to energy storage device 2. The other path passes through sixth throttling device 107, subcooler 109, and ninth control valve 108 and is connected to gas-liquid separator 110. The outlet of gas-liquid separator 110 is connected to the air inlet of compressor 101.

[0316] The energy storage device 2 is connected to the outdoor unit 1 via four pipes: a first gas pipe 202, a second gas pipe 203, a liquid-side main pipe 3, and a gas-side main pipe 4. The energy storage device 2 is also connected to the indoor unit via two pipes: the liquid-side main pipe 3 and the gas-side main pipe 4. The energy storage device 2 includes an energy accumulator 201 and a storage container 220.

[0317] One end of the liquid-side main pipe 3 is connected to the indoor unit, and the other end is divided into 3 branches. The first branch is connected to the third connection port 220a of the storage container 220 through the fifth control valve 221. The second branch is connected to one port of the accumulator 201 through the first liquid pipe 204. The third branch is connected to the second liquid pipe 205 and the other port of the accumulator 201 through the second throttling device 209.

[0318] One end of the first gas pipe 202 is connected to the exhaust port of the compressor 101, and the other end is divided into two branches. The first branch is connected to the second communication port 220b of the storage container 220 through the sixth control valve 222, and the second branch is connected to one port of the accumulator 201 through the third control valve 208.

[0319] One end of the second gas pipe 203 is connected to the inlet of the gas-liquid separator 110, and the other end branches into three branches. The first branch connects to the other port of the accumulator 201 through the fourth control valve 210 and the second liquid pipe 205. The second branch connects to the pipeline between the second connection port 220b and the sixth control valve 222 of the storage container 220 through the eighth control valve 224 and the fifth throttling device 226. The third branch connects to the first connection port 220c of the storage container 220 through the seventh control valve 223 and the fourth throttling device 225. One end of the gas-side main pipe 4 is connected to the indoor unit, and the other end is connected to the four-way valve 104.

[0320] The first end of the accumulator 201 is connected to the exhaust pipe of the compressor 101 via the first gas pipe 202 and to the liquid-side main pipe 3 via the first liquid pipe 204. The second end of the accumulator 201 is connected to the inlet pipe of the gas-liquid separator 110 via the second gas pipe 203 and to the liquid-side main pipe 3 via the second liquid pipe 205. To achieve function switching, a third control valve 208 is arranged on the first gas pipe 202 of the accumulator 201, and a first throttling device 206 and a first control valve 207 are arranged on the first liquid pipe 204, which are connected in parallel. A fourth control valve 210 is arranged on the second gas pipe 203, and a second throttling device 209 is arranged on the second liquid pipe 205. A second control valve 211 is arranged between the interface connecting to the first liquid pipe 204 and the interface connecting to the second liquid pipe 205 in the liquid-side main pipe 3. The liquid-side main pipe 3 and the gas-side main pipe 4 are respectively connected to both sides of the indoor heat exchanger 301 of the indoor unit.

[0321] The first control valve 207 is a cooling valve, the second control valve 211 is a bypass valve, the third control valve 208 is a high-pressure gas valve, and the fourth control valve 210 is a heat release valve. The fifth control valve 221 is a liquid inlet valve, the sixth control valve 222 is a pressurizing valve, the seventh control valve 223 is a liquid drain valve, and the eighth control valve 224 is a gas balance valve. The first throttling element 206 and the second throttling element 209 can be energy storage electronic expansion valves, the third throttling element 106 can be a heating electronic expansion valve, the sixth throttling element 107 can be a subcooling electronic expansion valve, and the ninth control valve 108 is a subcooling valve.

[0322] This embodiment provides a multifunctional energy storage air conditioning system that can provide energy storage and release services for various different power load transfer scenarios.

[0323] The accumulator 201 is filled with energy storage materials, such as organic phase change materials like ice water and paraffin wax, and inorganic phase change materials like mirabilite. The accumulator 201 is equipped with a refrigerant pipe, in which the refrigerant flows and exchanges heat fully with the energy storage material, enabling both cold storage and heat release.

[0324] By switching valve components, various functions can be achieved, including conventional refrigeration, complete cold storage, refrigeration and cold storage, subcooling and cold release, condensation and cold release, conventional heating, complete heat storage, heating and heat storage, mixed heat release, independent heat release, and defrosting.

[0325] Table 1 shows the correspondence between various operating modes and the states of various components in the valve assembly and the heat exchanger.

[0326] Table 1 Correspondence between Operating Modes and Valve States

[0327]

[0328]

[0329] like Figure 2 As shown, in the conventional refrigeration and refrigerant storage mode:

[0330] When the four-way valve 104 is de-energized, the first and second ports are connected, and the third and fourth ports are connected; the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are open, while the first control valve 207, the third control valve 208, the fourth control valve 210, the sixth control valve 222, and the seventh control valve 223 are all closed; the first throttling element 206 and the second throttling element 209 are both closed, and the third throttling element 106 is open with an adjustable opening size; the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is closed.

[0331] The refrigerant discharged by the compressor 101 flows through the outdoor heat exchanger 105 and enters the indoor unit through the liquid-side main pipe 3. After evaporation in the indoor unit, it returns to the suction side of the compressor 101 through the gas-side main pipe 4 and the gas-liquid separator 110. At this time, the accumulator 201 is not used, and only the conventional refrigeration cycle function is realized.

[0332] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is at low pressure, and the refrigerant in the medium pressure range enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during the normal refrigeration cycle.

[0333] like Figure 3 As shown, in the normal refrigeration refrigerant release mode:

[0334] When the four-way valve 104 is de-energized, the first and second ports are connected, and the third and fourth ports are connected; the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are open, while the first control valve 207, the third control valve 208, the fourth control valve 210, the fifth control valve 221, and the eighth control valve 224 are all closed; the first throttling element 206 and the second throttling element 209 are both closed, and the third throttling element 106 is open with an adjustable opening size; the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is closed.

[0335] The refrigerant discharged by the compressor 101 flows through the outdoor heat exchanger 105 and enters the indoor unit through the liquid-side main pipe 3. After evaporation in the indoor unit, it returns to the suction side of the compressor 101 through the gas-side main pipe 4 and the gas-liquid separator 110. At this time, the accumulator 201 is not used, and only the conventional refrigeration cycle function is realized.

[0336] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during the normal refrigeration cycle.

[0337] like Figure 4 As shown, in the fully cold storage refrigerant mode:

[0338] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the fourth control valve 210, the fifth control valve 221, and the eighth control valve 224 are open, while the first control valve 207, the third control valve 208, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are all closed; the first throttling element 206 is open and its opening size is adjustable, the second throttling element 209 is closed, and the third throttling element 106 is open and its opening size is adjustable; among these, the indoor heat exchanger 301 is closed, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as an evaporator.

[0339] The refrigerant discharged from the compressor 101 flows through the outdoor heat exchanger 105, through the liquid-side main pipe 3 and the first throttling device 206, into the accumulator 201. After evaporation, it returns to the suction side of the compressor 101 through the second gas pipe 203 and the gas-liquid separator 110. The refrigerant does not flow through the indoor unit, but evaporates in the accumulator 201, storing the cooling capacity in the accumulator 201.

[0340] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is at low pressure, and the refrigerant in the medium pressure range enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during the complete cold storage cycle.

[0341] like Figure 5 As shown, in the full cold storage and refrigerant release mode:

[0342] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the fourth control valve 210, the sixth control valve 222, and the seventh control valve 223 are open, while the first control valve 207, the third control valve 208, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are all closed; the first throttling element 206 is open and its opening size is adjustable, the second throttling element 209 is closed, and the third throttling element 106 is open and its opening size is adjustable; among these, the indoor heat exchanger 301 is closed, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as an evaporator.

[0343] The refrigerant discharged from the compressor 101 flows through the outdoor heat exchanger 105, through the liquid-side main pipe 3 and the first throttling device 206, into the accumulator 201. After evaporation, it returns to the suction side of the compressor 101 through the second gas pipe 203 and the gas-liquid separator 110. The refrigerant does not flow through the indoor unit, but evaporates in the accumulator 201, storing the cooling capacity in the accumulator 201.

[0344] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during the complete cold storage cycle.

[0345] like Figure 6 As shown, in the refrigerant storage and cooling mode:

[0346] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the fourth control valve 210, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 open, while the first control valve 207, the third control valve 208, the sixth control valve 222, and the seventh control valve 223 close; the first throttling element 206 is in the open state with an adjustable opening size, the second throttling element 209 is in the closed state, and the third throttling element 106 is in the open state with an adjustable opening size; wherein, the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as an evaporator.

[0347] The refrigerant discharged from compressor 101 flows through outdoor heat exchanger 105 and is divided into two paths via liquid-side main pipe 3. One path enters accumulator 201 through first throttling element 206, evaporates, and flows into second gas pipe 203. The other path enters indoor heat exchanger 301 for evaporation. The two paths converge at the inlet of gas-liquid separator 110 and return to the suction side of compressor 101. At this time, accumulator 201 and indoor heat exchanger simultaneously act as evaporators. Accumulator 201 stores cold energy, and indoor heat exchanger 301 provides cooling to the room.

[0348] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is at low pressure, and the refrigerant in the medium pressure range enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during the refrigeration and cold storage cycle.

[0349] like Figure 7 As shown, in the refrigerant release mode of refrigeration and cold storage:

[0350] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the fourth control valve 210, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 open, while the first control valve 207, the third control valve 208, the fifth control valve 221, and the eighth control valve 224 close; the first throttling element 206 is in the open state with an adjustable opening size, the second throttling element 209 is in the closed state, and the third throttling element 106 is in the open state with an adjustable opening size; wherein, the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as an evaporator.

[0351] The refrigerant discharged from compressor 101 flows through outdoor heat exchanger 105 and is divided into two paths via liquid-side main pipe 3. One path enters accumulator 201 through first throttling element 206, evaporates, and flows into second gas pipe 203. The other path enters indoor heat exchanger for evaporation. The two paths converge at the inlet of gas-liquid separator 110 and return to the suction side of compressor 101. At this time, accumulator 201 and indoor heat exchanger simultaneously act as evaporators. Accumulator 201 stores cold energy, and indoor heat exchanger provides cooling to the room.

[0352] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during refrigeration and cold storage cycles.

[0353] like Figure 8 As shown, in the subcooled release and storage refrigerant mode:

[0354] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the first control valve 207, the fifth control valve 221, and the eighth control valve 224 are open, while the third control valve 208, the fourth control valve 210, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 is closed, the second throttling element 209 is open, and the third throttling element 106 is open with an adjustable opening size; wherein, the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as a subcooler.

[0355] The refrigerant discharged from compressor 101 flows through outdoor heat exchanger 105, through liquid-side main pipe 3 and first control valve 207 into accumulator 201. After subcooling, it flows through second liquid pipe 205 and second throttling device 209 back into liquid-side main pipe 3. After evaporation in indoor heat exchanger 301, it returns to the suction side of compressor 101 through gas-side main pipe 4 and gas-liquid separator 110. At this time, accumulator 201 acts as a subcooler, releasing cooling capacity to the refrigerant condensed in outdoor heat exchanger 105, further increasing its subcooling degree before flowing into indoor unit for evaporation, thereby improving the refrigerant's cooling capacity.

[0356] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is at low pressure, the second control valve 211 is opened, and the refrigerant in the medium pressure section enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during the refrigeration and subcooling release cycle.

[0357] like Figure 9 As shown, in the subcooling release refrigerant mode:

[0358] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the first control valve 207, the sixth control valve 222, and the seventh control valve 223 are open, while the third control valve 208, the fourth control valve 210, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttling element 206 is closed, the second throttling element 209 is open, and the third throttling element 106 is open with an adjustable opening size; wherein, the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as a subcooler.

[0359] The refrigerant discharged from compressor 101 flows through outdoor heat exchanger 105, through liquid-side main pipe 3 and first control valve 207 into accumulator 201. After subcooling, it flows through second liquid pipe 205 and second throttling device 209 back into liquid-side main pipe 3. After evaporation in indoor heat exchanger, it returns to the suction side of compressor 101 through gas-side main pipe 4 and gas-liquid separator 110. At this time, accumulator 201 acts as a subcooler, releasing cooling capacity to the refrigerant condensed in outdoor heat exchanger 105, further increasing its subcooling degree before flowing into indoor unit for evaporation, thereby improving the refrigerant's cooling capacity.

[0360] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during the refrigeration and subcooling release cycles.

[0361] like Figure 10 As shown, in the condensation-release cooling storage refrigerant mode:

[0362] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the third control valve 208, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are open, while the first control valve 207, the fourth control valve 210, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 and the third throttling element 106 are closed, and the second throttling element 209 is open; wherein, the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is closed, and the accumulator 201 is used as a condenser.

[0363] The refrigerant discharged from compressor 101 flows into accumulator 201 through first gas pipe 202 and third control valve 208 for condensation. Then, it enters liquid-side main pipe 3 via second liquid pipe 205 and second throttling device 209. After evaporation in indoor heat exchanger, it returns to the suction side of compressor 101 via gas-side main pipe 4 and gas-liquid separator 110. At this time, outdoor heat exchanger 105 is not used; instead, accumulator 201 is used as a condenser to provide cooling capacity for the refrigeration cycle. Because the temperature of the cold storage material in accumulator 201 is much lower than the outdoor ambient temperature, the refrigeration cycle can operate under low pressure ratio conditions, significantly reducing the load on compressor 101.

[0364] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is at low pressure, the second control valve 211 is opened, and the refrigerant in the medium pressure section enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during the refrigeration and condensation release cycle.

[0365] like Figure 11 As shown, in the condensation and refrigerant release mode:

[0366] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the third control valve 208, the sixth control valve 222, and the seventh control valve 223 are open, while the first control valve 207, the fourth control valve 210, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttling element 206 and the third throttling element 106 are closed, and the second throttling element 209 is open; wherein, the indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is closed, and the accumulator 201 is used as a condenser.

[0367] The refrigerant discharged from compressor 101 flows into accumulator 201 through first gas pipe 202 and third control valve 208 for condensation. Then, it enters liquid-side main pipe 3 via second liquid pipe 205 and second throttling device 209. After evaporation in indoor heat exchanger, it returns to the suction side of compressor 101 via gas-side main pipe 4 and gas-liquid separator 110. At this time, outdoor heat exchanger 105 is not used; instead, accumulator 201 is used as a condenser to provide cooling capacity for the refrigeration cycle. Because the temperature of the cold storage material in accumulator 201 is much lower than the outdoor ambient temperature, the refrigeration cycle can operate under low pressure ratio conditions, significantly reducing the load on compressor 101.

[0368] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during the refrigeration and condensation cooling cycle.

[0369] like Figure 12 As shown, in the parallel cold release and storage refrigerant mode:

[0370] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the third control valve 208 and the second control valve 211 open, and the first throttling element 206, the first control valve 207, and the fourth control valve 210 close; the second throttling element 209 and the third throttling element 106 are both open and their opening sizes are adjustable; among them, the indoor heat exchanger 301 is used as an evaporator, and the outdoor heat exchanger 105 and the accumulator 201 are both used as condensers.

[0371] The refrigerant discharged from compressor 101 is divided into two paths. The first path flows through the first gas pipe 202 and the third control valve 208 into accumulator 201 for condensation, and then through the second liquid pipe 205 and the second throttling device 209 into the liquid-side main pipe 3. The other path flows through outdoor heat exchanger 105 for condensation, and then through the liquid-side main pipe 3 and the second control valve 211 before merging with the first path. After evaporation in indoor heat exchanger 301, it returns to the suction side of compressor 101 through the gas-side main pipe 4 and the gas-liquid separator 110. At this time, accumulator 201 and outdoor heat exchanger 105 are used simultaneously for condensation. Because accumulator 201 and outdoor heat exchanger 105 are used simultaneously as condensation devices, a large condensation capacity can be provided to meet the needs of high-load operation of the unit.

[0372] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is at low pressure, the second control valve 211 is opened, and the refrigerant in the medium pressure section enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during the parallel cooling cycle.

[0373] like Figure 13 As shown, in the parallel cooling and refrigerant release mode:

[0374] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the third control valve 208 and the second control valve 211 open, and the first throttling element 206, the first control valve 207, and the fourth control valve 210 close; the second throttling element 209 and the third throttling element 106 are both open and their opening sizes are adjustable; among them, the indoor heat exchanger 301 is used as an evaporator, and the outdoor heat exchanger 105 and the accumulator 201 are both used as condensers.

[0375] The refrigerant discharged from compressor 101 is divided into two paths. The first path flows through the first gas pipe 202 and the third control valve 208 into accumulator 201 for condensation, and then through the second liquid pipe 205 and the second throttling device 209 into the liquid-side main pipe 3. The other path flows through outdoor heat exchanger 105 for condensation, and then through the liquid-side main pipe 3 and the second control valve 211 before merging with the first path. After evaporation in indoor heat exchanger 301, it returns to the suction side of compressor 101 through the gas-side main pipe 4 and the gas-liquid separator 110. At this time, accumulator 201 and outdoor heat exchanger 105 are used simultaneously for condensation. Because accumulator 201 and outdoor heat exchanger 105 are used simultaneously as condensation devices, a large condensation capacity can be provided to meet the needs of high-load operation of the unit.

[0376] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during the refrigeration and condensation cooling cycle.

[0377] like Figure 14As shown, in the conventional heating and refrigerant storage mode:

[0378] When the four-way valve 104 is energized, the first port is connected to the fourth port, and the second port is connected to the third port; the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are open, and the first control valve 207, the third control valve 208, the fourth control valve 210, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 and the second throttling element 209 are closed, and the third throttling element 106 is open and its opening size is adjustable; wherein, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is closed.

[0379] The refrigerant discharged from compressor 101 flows into the indoor heat exchanger for condensation via the gas-side main pipe 4, and flows into the outdoor heat exchanger 105 for evaporation via the liquid-side main pipe 3. It then returns to the suction side of compressor 101 via gas-liquid separator 110. At this time, the accumulator is not used, and only the conventional heating cycle is used.

[0380] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is at low pressure, and the refrigerant in the medium pressure range enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during the normal heating cycle.

[0381] like Figure 15 As shown, in the conventional heating refrigerant release mode:

[0382] When the four-way valve 104 is energized, the first port is connected to the fourth port, and the second port is connected to the third port; the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are open, and the first control valve 207, the third control valve 208, the fourth control valve 210, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttling element 206 and the second throttling element 209 are closed, and the third throttling element 106 is open and its opening size is adjustable; wherein, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is closed.

[0383] The refrigerant discharged from compressor 101 flows into the indoor heat exchanger for condensation via the gas-side main pipe 4, and flows into the outdoor heat exchanger 105 for evaporation via the liquid-side main pipe 3. It then returns to the suction side of compressor 101 via gas-liquid separator 110. At this time, the accumulator is not used, and only the conventional heating cycle is used.

[0384] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during the normal heating cycle.

[0385] like Figure 16 As shown, in the fully thermal storage refrigerant mode:

[0386] When the four-way valve 104 is energized, the first port connects to the fourth port, and the second port connects to the third port; the third control valve 208, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are opened, while the first control valve 207, the fourth control valve 210, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 is closed, the second throttling element 209 is open, and the third throttling element 106 is open with an adjustable opening size; among these, the indoor heat exchanger 301 is closed, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is used as a condenser.

[0387] The refrigerant discharged from the compressor flows into the accumulator 201 through the first gas pipe 202 and the third control valve 208 for condensation. Then, it enters the liquid-side main pipe 3 through the second liquid pipe 205 and the second throttling device 209, and flows into the outdoor heat exchanger 105 through the second control valve 211. After evaporation in the outdoor heat exchanger 105, it returns to the suction side of the compressor 101 through the four-way valve 104, the gas-side main pipe 4, and the gas-liquid separator 110. At this time, the refrigerant condenses in the accumulator 201, storing heat, and evaporates in the outdoor heat exchanger 105.

[0388] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is at low pressure, and the refrigerant in the medium pressure range enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during the complete heat storage cycle.

[0389] like Figure 17 As shown, in the fully heat storage and refrigerant release mode:

[0390] When the four-way valve 104 is energized, the first port is connected to the fourth port, and the second port is connected to the third port; the third control valve 208, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are opened, while the first control valve 207, the fourth control valve 210, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttling element 206 is closed, the second throttling element 209 is open, and the third throttling element 106 is open with an adjustable opening size; among these, the indoor heat exchanger 301 is closed, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is used as a condenser.

[0391] The refrigerant discharged from the compressor flows into the accumulator 201 through the first gas pipe 202 and the third control valve 208 for condensation. Then, it enters the liquid-side main pipe 3 through the second liquid pipe 205 and the second throttling device 209, and flows into the outdoor heat exchanger 105 through the second control valve 211. After evaporation in the outdoor heat exchanger 105, it returns to the suction side of the compressor 101 through the four-way valve 104, the gas-side main pipe 4, and the gas-liquid separator 110. At this time, the refrigerant condenses in the accumulator 201, storing heat, and evaporates in the outdoor heat exchanger 105.

[0392] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during the complete heat storage cycle.

[0393] like Figure 18 As shown, in the heat storage and refrigerant storage mode:

[0394] When the four-way valve 104 is energized, the first port is connected to the fourth port, and the second port is connected to the third port; the third control valve 208, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are opened, while the first control valve 207, the fourth control valve 210, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 is in the closed state, the second throttling element 209 is in the open state, and the third throttling element 106 is in the open state with an adjustable opening size; wherein, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is used as a condenser.

[0395] The refrigerant discharged from the compressor is divided into two paths. One path flows into the accumulator 201 through the first gas pipe 202 and the third control valve 208 for condensation, and then enters the liquid-side main pipe 3 through the second liquid pipe 205 and the second throttling device 209. The other path enters the indoor heat exchanger through the four-way valve 104, condenses, and then enters the liquid-side main pipe 3 to merge with the first path of refrigerant. After condensation, it flows into the outdoor heat exchanger 105 through the second control valve 211 for evaporation, and then returns to the suction side of the compressor 101 through the four-way valve 104, the gas-side main pipe 4, and the gas-liquid separator 110. At this time, the accumulator 201 and the indoor heat exchanger simultaneously act as condensers, storing heat and generating heat at the same time, while the outdoor heat exchanger 105 acts as an evaporator.

[0396] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is under low pressure, and the refrigerant in the medium pressure range enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during heating and heat storage cycles.

[0397] like Figure 19 As shown, in the refrigerant release mode for heat storage and heating:

[0398] When the four-way valve 104 is energized, the first port connects to the fourth port, and the second port connects to the third port; the third control valve 208, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are opened, while the first control valve 207, the fourth control valve 210, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttling element 206 is closed, the second throttling element 209 is open, and the third throttling element 106 is open with an adjustable opening size; wherein, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is used as a condenser.

[0399] The refrigerant discharged from the compressor is divided into two paths. One path flows into the accumulator 201 through the first gas pipe 202 and the third control valve 208 for condensation, and then enters the liquid-side main pipe 3 through the second liquid pipe 205 and the second throttling device 209. The other path enters the indoor heat exchanger through the four-way valve 104, condenses, and then enters the liquid-side main pipe 3 to merge with the first path of refrigerant. After condensation, it flows into the outdoor heat exchanger 105 through the second control valve 211 for evaporation, and then returns to the suction side of the compressor 101 through the four-way valve 104, the gas-side main pipe 4, and the gas-liquid separator 110. At this time, the accumulator 201 and the indoor heat exchanger simultaneously act as condensers, storing heat and generating heat at the same time, while the outdoor heat exchanger 105 acts as an evaporator.

[0400] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during heating and heat storage cycles.

[0401] like Figure 20 As shown, in the mixed heat release storage refrigerant mode:

[0402] When the four-way valve 104 is energized, the first port is connected to the fourth port, and the second port is connected to the third port; the fourth control valve 210, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are opened, while the first control valve 207, the third control valve 208, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 and the third throttling element 106 are both in the open state and their opening size is adjustable, while the second throttling element 209 is in the closed state; wherein, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is used as an evaporator.

[0403] The refrigerant discharged from compressor 101 flows into indoor heat exchanger 301 via gas-side main pipe 4 for condensation. After passing through second control valve 211, it is split into two streams: one stream flows through first liquid pipe 204 and first throttling device 206 into accumulator 201 for evaporation, then flows into second gas pipe 203 and fourth control valve 210; the other stream flows through liquid-side main pipe 3 into outdoor heat exchanger 105 for evaporation. The two streams of refrigerant converge at the inlet section of gas-liquid separator 110 and return to the suction side of compressor 101. At this time, accumulator 201 undertakes part of the evaporation load, increasing the suction pressure.

[0404] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is at low pressure, and the refrigerant in the medium pressure section enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during heating and mixing heat release cycles.

[0405] like Figure 21 As shown, in the mixed heat release refrigerant release mode:

[0406] When the four-way valve 104 is energized, the first port connects to the fourth port, and the second port connects to the third port; the fourth control valve 210, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are opened, while the first control valve 207, the third control valve 208, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttling element 206 and the third throttling element 106 are both in the open state and their opening size is adjustable, while the second throttling element 209 is in the closed state; wherein, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is used as an evaporator.

[0407] The refrigerant discharged from compressor 101 flows into indoor heat exchanger 301 via gas-side main pipe 4 for condensation. After passing through second control valve 211, it is split into two streams: one stream flows through first liquid pipe 204 and first throttling device 206 into accumulator 201 for evaporation, then flows into second gas pipe 203 and fourth control valve 210; the other stream flows through liquid-side main pipe 3 into outdoor heat exchanger 105 for evaporation. The two streams of refrigerant converge at the inlet section of gas-liquid separator 110 and return to the suction side of compressor 101. At this time, accumulator 201 undertakes part of the evaporation load, increasing the suction pressure.

[0408] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during heating and mixing heat release cycles.

[0409] like Figure 22 As shown, in the independent heat release and storage refrigerant mode:

[0410] When the four-way valve 104 is energized, the first port connects to the fourth port, and the second port connects to the third port; the fourth control valve 210, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are opened, while the first control valve 207, the third control valve 208, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 is in the open state and its opening size is adjustable, while the second throttling element 209 and the third throttling element 106 are both in the closed state; wherein, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is closed, and the accumulator 201 is used as an evaporator.

[0411] The refrigerant discharged from compressor 101 flows into the indoor heat exchanger via the gas-side main pipe 4 for condensation. After passing through the second control valve 211, it enters the accumulator 201 via the first liquid pipe 204 and the first throttling device 206 for evaporation. Then, it flows into the gas-liquid separator 110 via the second gas pipe 203 and returns to the suction side of compressor 101. At this time, the accumulator 201 bears the entire evaporation load.

[0412] Furthermore, when the eighth control valve 224 is opened, the storage container 220 is at low pressure, and the refrigerant in the medium pressure section enters the storage container through the fifth control valve 221, realizing the refrigerant storage function during heating and independent heat release cycles.

[0413] like Figure 23 As shown, in the independent heat release refrigerant release mode:

[0414] When the four-way valve 104 is energized, the first port connects to the fourth port, and the second port connects to the third port; the fourth control valve 210, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are opened, while the first control valve 207, the third control valve 208, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttling element 206 is in the open state and its opening size is adjustable, while the second throttling element 209 and the third throttling element 106 are both in the closed state; wherein, the indoor heat exchanger 301 is used as a condenser, the outdoor heat exchanger 105 is closed, and the accumulator 201 is used as an evaporator.

[0415] The refrigerant discharged from compressor 101 flows into the indoor heat exchanger via the gas-side main pipe 4 for condensation. After passing through the second control valve 211, it enters the accumulator 201 via the first liquid pipe 204 and the first throttling device 206 for evaporation. Then, it flows into the gas-liquid separator 110 via the second gas pipe 203 and returns to the suction side of compressor 101. At this time, the accumulator 201 bears the entire evaporation load.

[0416] Furthermore, when the sixth control valve 222 is opened, the refrigerant inside the storage container 220, under high pressure, enters the gas-liquid separator 110 through the opened seventh control valve 223, realizing the refrigerant release function during heating and independent heat release cycles.

[0417] likeFigure 24 The diagram shown is a structural schematic of another embodiment of the air conditioning system provided by the present invention. In this embodiment, it is similar to... Figure 1 The main difference between the embodiments shown is the location and number of the communication ports provided in the storage container 220.

[0418] In this embodiment, the storage container 220 has two communication ports: a fourth communication port 220d at the bottom and a fifth communication port 220e at the top. The fourth communication port 220d is connected to the tenth control valve 227, and the end of the tenth control valve 227 away from the fourth communication port 220d is connected to the connecting pipe between the first connection point and the outdoor heat exchanger 105. The fifth communication port 220e is connected to the seventh throttling element 228, and the seventh throttling element 228 is connected to the eleventh control valve 229, and the end of the eleventh control valve 229 away from the seventh throttling element 228 is connected to the connecting pipe between the fourth control valve 210 and the air inlet of the compressor 101.

[0419] In this embodiment, the method for controlling the storage container 220 to enter the off state, the refrigerant storage state, and the refrigerant release state is the same as... Figure 1 The illustrated embodiments also differ. Specifically:

[0420] When storage container 220 is in the closed state, both the tenth control valve 227 and the eleventh control valve 229 are closed.

[0421] When the storage container 220 is in the state of storing refrigerant, both the tenth control valve 227 and the eleventh control valve 229 are open;

[0422] When the storage container 220 is in the refrigerant release state, the tenth control valve 227 is closed and the eleventh control valve 229 is open.

[0423] In this embodiment, when the air conditioning system is in various operating modes, the control methods for the tenth control valve 227, the seventh throttling element 228, and the eleventh control valve 229 are the same as those for... Figure 1 Except for the embodiments shown, the control methods for other control valves and throttling devices are the same as those described above. Figure 1 The embodiments shown are the same, and will not be repeated here.

[0424] The air conditioning system embodiment provided by the present invention also has a defrosting mode, in which:

[0425] When the four-way valve 104 is de-energized, the first port connects to the second port, and the third port connects to the fourth port; the fourth control valve 210 opens, and the first control valve 207, the third control valve 208, and the second control valve 211 are all closed; the first throttling element 206 is open and its opening size is adjustable, the second throttling element 209 is closed, and the third throttling element 106 is open and its opening size is adjustable; among these, the indoor heat exchanger 301 is closed, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as an evaporator.

[0426] The refrigerant discharged from compressor 101 flows through outdoor heat exchanger 105 and condenses. It then enters accumulator 201 through liquid-side main pipe 3 and first throttling device 206. After evaporation, it returns to the suction side of compressor 101 through fourth control valve 210, second gas pipe 203, and gas-liquid separator 110. The refrigerant does not flow through indoor unit but evaporates in accumulator 201, using the stored heat to defrost outdoor heat exchanger 105.

[0427] In defrost mode, if there is heat inside the storage container 220, the sixth control valve 222 and the seventh control valve 223 can be opened, allowing the refrigerant inside the storage container 220 to enter the gas-liquid separator 110 under high pressure through the opened seventh control valve 223, thus releasing the refrigerant. If there is no heat inside the storage container 220, the storage container 220 can be closed.

[0428] When electricity prices are low, energy storage device 2 is used to store energy; when electricity prices are high, energy storage device 2 is used to release cold or heat, which can provide energy for the system, reduce the operating frequency of the compressor, reduce power consumption, reduce operating costs, achieve "peak shaving and valley filling" of electricity, and reduce the operating cost of air conditioning.

[0429] When defrosting using energy storage device 2, it can handle the system's evaporation load. Compared to the reverse circulation defrosting scheme used in air conditioners without energy storage, it does not need to absorb heat from the room, thus helping to maintain indoor comfort. Overall, this multi-functional energy storage air conditioning system can effectively reduce operating costs for various application scenarios.

[0430] Users can generally determine the low energy consumption requirement and ultra-low energy consumption requirement based on real-time electricity prices and power consumption: when the electricity price is at its peak, or when the air conditioning cooling demand is large, users can set the low energy consumption requirement and ultra-low energy consumption requirement according to the actual situation.

[0431] When the air conditioning system only has cooling demand, the piping is switched to "normal cooling" mode, and the accumulator 201 is not used; when the system only has cold storage demand, it is switched to "full cold storage" mode, and the indoor unit is not used; when the system has both cold storage and cooling demand, it is switched to "cooling and cold storage simultaneously" mode, and the refrigerant flow allocated to the accumulator 201 is adjusted by the opening of the first throttling element 206; when the system has low energy consumption and high condensing cooling demand, and the accumulator 201 stores cold energy, it is switched to "parallel cold release" mode. In this mode, because the stored cold energy is used to subcool the refrigerant, additional cooling capacity is provided, thus reducing energy consumption. The purpose of energy consumption reduction is as follows: When the system has a low energy consumption and low condensation cooling demand, and the accumulator 201 has stored cold energy, it switches to the "subcooling release" mode. In this mode, the stored cold energy is used to subcool the refrigerant, providing additional cooling capacity, thus achieving the goal of reducing energy consumption. When the system has an ultra-low energy consumption cooling demand, and the accumulator 201 has stored cold energy, it switches to the "condensation release" mode. The accumulator 201 acts as the condenser and the indoor unit acts as the evaporator to achieve the cooling cycle. In this mode, the low-temperature material in the accumulator is used as the cold source, and the cooling capacity of the refrigerant is greatly improved, thus helping to significantly reduce the system's energy consumption.

[0432] When the air conditioning system only has heating demand, switch the piping to "normal heating" mode; when the system only has heat storage demand, switch to "full heat storage" mode; when the system has both heating and heat storage demand, switch to "heating and heat storage simultaneously" mode; when the system has low-energy heat release heating demand, and the accumulator 201 contains heat, switch to "mixed heat release" mode. In this mode, the accumulator 201 and the outdoor heat exchanger 105 simultaneously act as evaporators, which helps increase the suction pressure of the compressor 101, increase the displacement of the compressor 101 and the cooling capacity of the system. The operating frequency of 1 is reduced, thereby reducing energy consumption. When the system has an ultra-low energy consumption heat release heating demand and the accumulator 201 contains heat, it switches to the "independent heat release" mode. At this time, the accumulator 201 acts as an independent heat source with a higher heat exchange temperature, which can significantly improve the heating capacity of the refrigerant, thereby reducing system energy consumption. When the system is detected to have a defrosting demand and the accumulator 201 contains heat, the four-way valve reverses and switches to the "defrosting" mode, releasing the heat stored in the accumulator 201 to provide heat for the defrosting of the outdoor heat exchanger 105.

[0433] In cooling mode, when there is a need to significantly reduce power consumption in a short period, the condensation-release cooling function can be used. This means that instead of using the outdoor heat exchanger as a condenser, the accumulator alone acts as the condenser for the cooling cycle. Because the temperature of the energy storage material in the accumulator after storing cold energy is low, much lower than the outdoor ambient temperature, the compressor does not need to provide excessive pressure. The system can operate under low compression ratio conditions, greatly reducing system energy consumption. Simultaneously, the heat conduction between the low-temperature energy storage material and the refrigerant replaces the air-cooled heat exchange of the outdoor heat exchanger, improving heat exchange efficiency. In heating mode, the accumulator can also be used alone as an evaporator to form a cooling cycle with the indoor heat exchanger, reducing energy consumption and improving efficiency.

[0434] The air conditioning system embodiments of the present invention can store and release refrigerant through a storage container in 11 functional scenarios, including conventional cooling, complete cold storage, cooling and cold storage, subcooling and cold release, condensation and cold release, parallel cold release, conventional heating, complete heat storage, heating and heat storage, mixed heat release, and independent heat release, facilitating the refrigerant usage requirements under different operating modes. The specific characteristics of refrigerant storage and release are as follows:

[0435] When the current operating mode determines that the refrigerant storage needs to be activated, the fifth control valve 221 and the eighth control valve 224 open, while the sixth control valve 222 and the seventh control valve 223 close. The opening of the eighth control valve 224 lowers the pressure in the storage container 220, while the opening of the fifth control valve 221 places the refrigerant inlet pipe of the storage container 220 in a medium-pressure state. The refrigerant then enters the storage container 220 under the influence of the pressure difference.

[0436] When the current operating mode determines that the refrigerant tank needs to be activated to release refrigerant, the fifth control valve 221 and the eighth control valve 224 close, while the sixth control valve 222 and the seventh control valve 223 open. The opening of the seventh control valve 223 keeps the outlet of the storage container 220 under low pressure, while the opening of the sixth control valve 222 keeps the pressure in the storage container 220 under high pressure. Under the influence of gravity and the pressure difference, the refrigerant inside the storage container 220 is discharged from the storage container 220 and enters the pipeline circulation system.

[0437] By storing and releasing refrigerant in storage containers, the problem of poor heat exchange caused by inconsistent refrigerant demand in different operating modes of the combined system of energy storage equipment and air conditioning outdoor and indoor units can be solved.

[0438] The capacity of the storage container 220 can be set according to the difference between the maximum and minimum required circulation volume of the system, and the amount of refrigerant required can be adjusted by liquid inlet and liquid outlet control.

[0439] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can still be made to some technical features without departing from the principle of the present invention, and such modifications and equivalent substitutions should all be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. An air conditioning system, characterized in that, include: Compressor (101); Outdoor heat exchanger (105); Indoor heat exchanger (301); The storage container (220) is in fluid communication with the compressor (101), the outdoor heat exchanger (105), and the indoor heat exchanger (301); A valve assembly is connected to the compressor (101), the outdoor heat exchanger (105), the indoor heat exchanger (301), and the storage container (220). The valve assembly is configured to control the flow direction of refrigerant and / or the opening and closing of connecting pipes to adjust the state of the storage container (220) and realize the switching of the air conditioning system between different operating modes. The state of the storage container (220) includes a closed state, a refrigerant-storing state, and a refrigerant-releasing state. and An energy accumulator (201) is provided, with its first end connected to the outdoor heat exchanger (105) and its second end connected to the indoor heat exchanger (301) and the air inlet of the compressor (101). A valve assembly is connected to the energy accumulator (201) to regulate its state. The states of the energy accumulator (201) include a non-working state, a cold energy storage state, a cold energy release state, a heat energy storage state, and a heat energy release state. The valve assembly includes a first control valve (207) and a first throttling element (206). The first control valve (207) and the first throttling element (206) are connected in parallel between the first end of the accumulator (201) and the outdoor heat exchanger (105). The valve assembly also includes a four-way valve (104). The four-way valve (104) includes a first interface, a second interface, a third interface and a fourth interface. The first interface is connected to the exhaust port of the compressor (101), the second interface is connected to the outdoor heat exchanger (105), the third interface is connected to the air inlet of the compressor (101), and the fourth interface is connected to the indoor heat exchanger (301). The first end of the accumulator (201) is also connected to the pipeline between the first interface and the exhaust port of the compressor (101).

2. The air conditioning system according to claim 1, characterized in that, The valve assembly includes a second control valve (211) disposed on a connecting pipe between the indoor heat exchanger (301) and a first connection point located on a pipe connecting the outdoor heat exchanger (105) to the first control valve (207) and the first throttling element (206).

3. The air conditioning system according to claim 1, characterized in that, The valve assembly includes a third control valve (208) disposed on a connecting pipe between the first end of the accumulator (201) and the exhaust port of the compressor (101).

4. The air conditioning system according to claim 1, characterized in that, The valve assembly includes a fourth control valve (210), which is disposed on the connecting pipeline between the second end of the accumulator (201) and the air inlet of the compressor (101).

5. The air conditioning system according to claim 1, characterized in that, The valve assembly includes a second throttling element (209), the first end of which is connected to the second end of the accumulator (201), and the second end of which is connected to the indoor heat exchanger (301) and the outdoor heat exchanger (105) respectively.

6. The air conditioning system according to claim 1, characterized in that, The valve assembly includes a third throttling element (106) disposed on the connecting pipe between the outdoor heat exchanger (105) and the indoor heat exchanger (301).

7. The air conditioning system according to claim 1, characterized in that, It also includes a subcooler (109) disposed between the outdoor heat exchanger (105) and the indoor heat exchanger (301), and the subcooler (109) is connected to the air inlet of the compressor (101).

8. The air conditioning system according to any one of claims 1 to 7, characterized in that, The valve assembly includes a fifth control valve (221), a sixth control valve (222), a seventh control valve (223), and an eighth control valve (224). The fifth control valve (221) is connected between a first connecting pipe and the third connection port (220a) of the storage container (220). The first connecting pipe is a pipe connecting the outdoor heat exchanger (105) to the indoor heat exchanger (301) and the accumulator (201) respectively. The sixth control valve (222) is connected to the exhaust port of the compressor (101) and the accumulator (201). The seventh control valve (223) is connected between the connecting pipe between the second end of the accumulator (201) and the air inlet of the compressor (101) and the first connecting port (220c) of the storage container (220). The eighth control valve (224) is connected between the connecting pipe between the second end of the accumulator (201) and the air inlet of the compressor (101) and the second connecting port (220b) of the storage container (220).

9. The air conditioning system according to claim 8, characterized in that, The valve assembly further includes a fourth throttling element (225) and a fifth throttling element (226), the fourth throttling element (225) being connected between the seventh control valve (223) and the first communication port (220c) of the storage container (220), and the fifth throttling element (226) being connected between the eighth control valve (224) and the second communication port (220b) of the storage container (220).

10. The air conditioning system according to any one of claims 1 to 7, characterized in that, The valve assembly includes a tenth control valve (227), a seventh throttling element (228), and an eleventh control valve (229). The tenth control valve (227) is connected between a first connecting pipe and the fourth connection port (220d) of the storage container (220). The first connecting pipe is a pipe that connects the outdoor heat exchanger (105) to the indoor heat exchanger (301) and the accumulator (201) respectively. The eleventh control valve (229) is connected between the connecting pipe between the second end of the accumulator (201) and the air inlet of the compressor (101) and the fifth connection port (220e) of the storage container (220). The seventh throttling element (228) is connected between the eleventh control valve (229) and the fifth connection port (220e) of the storage container (220).

11. The air conditioning system according to claim 1, characterized in that, The valve assembly includes a first control valve (207), a second control valve (211), a third control valve (208), a fourth control valve (210), a first throttling element (206), a second throttling element (209), a third throttling element (106), and a four-way valve (104). The first control valve (207) and the first throttling element (206) are connected in parallel between the first end of the accumulator (201) and a first connection point. The first connection point is connected to the outdoor heat exchanger (105). The second control valve (211) is located on the connecting pipe between the first connection point and the indoor heat exchanger (301). The third control valve (208) is located on the connecting pipe between the first end of the accumulator (201) and the exhaust port of the compressor (101). The fourth control valve (210) is located on the connecting pipe between the first end of the accumulator (201) and the exhaust port of the compressor (101). On the connecting pipe between the second end of the accumulator (201) and the air inlet of the compressor (101), the first end of the second throttling element (209) is connected to the second end of the accumulator (201), and the second end of the second throttling element (209) is connected to the indoor heat exchanger (301) and the outdoor heat exchanger (105) respectively. The third throttling element (106) is provided on the connecting pipe between the outdoor heat exchanger (105) and the first connection point. The four-way valve (104) includes a first interface, a second interface, a third interface and a fourth interface. The first interface is connected to the exhaust port of the compressor (101), the second interface is connected to the outdoor heat exchanger (105), the third interface is connected to the air inlet of the compressor (101), and the fourth interface is connected to the indoor heat exchanger (301).

12. A control method for an air conditioning system as described in any one of claims 1 to 11, characterized in that, include: Determine the operating mode of the air conditioning system; The valve assembly and storage container (220) in the air conditioning system are controlled according to the preset control strategy and the working mode.

13. A control method for an air conditioning system as described in any one of claims 1 to 11, characterized in that, include: Determine the operating mode of the air conditioning system; The valve assembly, accumulator (201), and storage container (220) in the air conditioning system are controlled according to the preset control strategy and based on the working mode.

14. The control method according to claim 13, characterized in that, Determining the operating mode of the air conditioning system includes: During periods when the power supply system has high electricity prices, the operating mode of the air conditioning system is determined to be the mode corresponding to the energy storage device (201) being in a non-working state, releasing cold energy, or releasing heat. During periods when the power supply system has low electricity prices, the operating mode of the air conditioning system is determined to be the mode corresponding to the energy storage device (201) being in a non-working state, a cold storage state, or a heat storage state.

15. The control method according to claim 13, characterized in that, Determining the operating mode of the air conditioning system includes: Detect whether there is energy stored in the energy storage device (201); The operating mode of the air conditioning system is determined based on the test results.

16. A control method based on the air conditioning system as described in claim 11, characterized in that, include: Determine the operating mode of the air conditioning system; According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling device (206), the second throttling device (209), the third throttling device (106) and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201) and the storage container (220) are controlled.

17. The control method according to claim 16, characterized in that, According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling element (206), the second throttling element (209), the third throttling element (106), and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201), and the storage container (220) are controlled, including: When the working mode is the normal cooling mode, the four-way valve (104) is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface; The second control valve (211) is opened, while the first control valve (207), the third control valve (208), and the fourth control valve (210) are all closed; The first throttling element (206) and the second throttling element (209) are both in a closed state, while the third throttling element (106) is in an open state with an adjustable opening size; and The storage container (220) is controlled to be in a closed state, a refrigerant storage state, or a refrigerant release state; The indoor heat exchanger (301) is used as an evaporator, the outdoor heat exchanger (105) is used as a condenser, and the accumulator (201) is turned off.

18. The control method according to claim 16, characterized in that, According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling element (206), the second throttling element (209), the third throttling element (106), and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201), and the storage container (220) are controlled, including: When the working mode is the full cold storage mode, the four-way valve (104) is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface; The fourth control valve (210) is opened, while the first control valve (207), the third control valve (208), and the second control valve (211) are all closed; The first throttling element (206) is controlled to be in the open state with an adjustable opening size, the second throttling element (209) is controlled to be in the closed state, and the third throttling element (106) is controlled to be in the open state with an adjustable opening size; and The storage container (220) is controlled to be in a closed state, a refrigerant storage state, or a refrigerant release state; The indoor heat exchanger (301) is closed, the outdoor heat exchanger (105) is used as a condenser, and the accumulator (201) is used as an evaporator.

19. The control method according to claim 16, characterized in that, According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling element (206), the second throttling element (209), the third throttling element (106), and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201), and the storage container (220) are controlled, including: When the working mode is the refrigeration and cold storage mode, the four-way valve (104) is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface; The fourth control valve (210) and the second control valve (211) are opened, while the first control valve (207) and the third control valve (208) are closed. The first throttling element (206) is controlled to be in the open state with an adjustable opening size, the second throttling element (209) is controlled to be in the closed state, and the third throttling element (106) is controlled to be in the open state with an adjustable opening size; and The storage container (220) is controlled to be in a closed state, a refrigerant storage state, or a refrigerant release state; The indoor heat exchanger (301) is used as an evaporator, the outdoor heat exchanger (105) is used as a condenser, and the accumulator (201) is used as an evaporator.

20. The control method according to claim 16, characterized in that, According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling element (206), the second throttling element (209), the third throttling element (106), and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201), and the storage container (220) are controlled, including: When the working mode is the subcooling release mode, the four-way valve (104) is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface; The first control valve (207) is opened, and the third control valve (208), the fourth control valve (210), and the second control valve (211) are closed; The first throttling element (206) is controlled to be in a closed state, the second throttling element (209) is controlled to be in an open state, and the third throttling element (106) is controlled to be in an open state with an adjustable opening size; and The storage container (220) is controlled to be in a closed state, a refrigerant storage state, or a refrigerant release state; The indoor heat exchanger (301) is used as an evaporator, the outdoor heat exchanger (105) is used as a condenser, and the accumulator (201) is used as a subcooler.

21. The control method according to claim 16, characterized in that, According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling element (206), the second throttling element (209), the third throttling element (106), and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201), and the storage container (220) are controlled, including: When the working mode is condensation and cooling mode, the four-way valve (104) is de-energized, the first interface is connected to the second interface, and the third interface is connected to the fourth interface; The third control valve (208) is opened, and the first control valve (207), the fourth control valve (210), and the second control valve (211) are closed; Controlling the first throttling element (206) and the third throttling element (106) to be in the closed state, and the second throttling element (209) to be in the open state; and The storage container (220) is controlled to be in a closed state, a refrigerant storage state, or a refrigerant release state; The indoor heat exchanger (301) is used as an evaporator, the outdoor heat exchanger (105) is turned off, and the accumulator (201) is used as a condenser.

22. The control method according to claim 16, characterized in that, According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling element (206), the second throttling element (209), the third throttling element (106), and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201), and the storage container (220) are controlled, including: When the working mode is the normal heating mode, the four-way valve (104) is energized, the first interface is connected to the fourth interface, and the second interface is connected to the third interface; The second control valve (211) is opened, and the first control valve (207), the third control valve (208), and the fourth control valve (210) are closed; The first throttling element (206) and the second throttling element (209) are controlled to be in a closed state, and the third throttling element (106) is in an open state with an adjustable opening size; and The storage container (220) is controlled to be in a closed state, a refrigerant storage state, or a refrigerant release state; The indoor heat exchanger (301) is used as a condenser, the outdoor heat exchanger (105) is used as an evaporator, and the accumulator (201) is turned off.

23. The control method according to claim 16, characterized in that, According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling element (206), the second throttling element (209), the third throttling element (106), and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201), and the storage container (220) are controlled, including: When the working mode is the full heat storage mode, the four-way valve (104) is energized, the first interface is connected to the fourth interface, and the second interface is connected to the third interface; The third control valve (208) and the second control valve (211) are opened, while the first control valve (207) and the fourth control valve (210) are closed. The first throttling element (206) is controlled to be in a closed state, the second throttling element (209) is controlled to be in an open state, and the third throttling element (106) is controlled to be in an open state with an adjustable opening size; and The storage container (220) is controlled to be in a closed state, a refrigerant storage state, or a refrigerant release state; The indoor heat exchanger (301) is closed, the outdoor heat exchanger (105) is used as an evaporator, and the accumulator (201) is used as a condenser.

24. The control method according to claim 16, characterized in that, According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling element (206), the second throttling element (209), the third throttling element (106), and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201), and the storage container (220) are controlled, including: When the working mode is heating and heat storage mode, the four-way valve (104) is energized, the first interface is connected to the fourth interface, and the second interface is connected to the third interface; The third control valve (208) and the second control valve (211) are opened, while the first control valve (207) and the fourth control valve (210) are closed; The first throttling element (206) is controlled to be in a closed state, the second throttling element (209) is controlled to be in an open state, and the third throttling element (106) is controlled to be in an open state with an adjustable opening size; and The storage container (220) is controlled to be in a closed state, a refrigerant storage state, or a refrigerant release state; The indoor heat exchanger (301) is used as a condenser, the outdoor heat exchanger (105) is used as an evaporator, and the accumulator (201) is used as a condenser.

25. The control method according to claim 16, characterized in that, According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling element (206), the second throttling element (209), the third throttling element (106), and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201), and the storage container (220) are controlled, including: When the working mode is the mixed heat release mode, the four-way valve (104) is energized, the first interface is connected to the fourth interface, and the second interface is connected to the third interface; The fourth control valve (210) and the second control valve (211) are opened, while the first control valve (207) and the third control valve (208) are closed; The first throttling element (206) and the third throttling element (106) are both in the open state with adjustable opening sizes, while the second throttling element (209) is in the closed state; and The storage container (220) is controlled to be in a closed state, a refrigerant storage state, or a refrigerant release state; The indoor heat exchanger (301) is used as a condenser, the outdoor heat exchanger (105) is used as an evaporator, and the accumulator (201) is used as an evaporator.

26. The control method according to claim 16, characterized in that, According to the preset control strategy and based on the working mode, the operation of the first control valve (207), the second control valve (211), the third control valve (208), the fourth control valve (210), the first throttling element (206), the second throttling element (209), the third throttling element (106), and the four-way valve (104) in the air conditioning system, as well as the status of the outdoor heat exchanger (105), the indoor heat exchanger (301), the accumulator (201), and the storage container (220) are controlled, including: When the working mode is independent heat release mode, the four-way valve (104) is energized, the first interface is connected to the fourth interface, and the second interface is connected to the third interface; The fourth control valve (210) and the second control valve (211) are opened, while the first control valve (207) and the third control valve (208) are closed. The first throttling element (206) is controlled to be in the open state with an adjustable opening size, while the second throttling element (209) and the third throttling element (106) are both in the closed state; and The storage container (220) is controlled to be in a closed state, a refrigerant storage state, or a refrigerant release state; The indoor heat exchanger (301) is used as a condenser, the outdoor heat exchanger (105) is turned off, and the accumulator (201) is used as an evaporator.

27. The control method according to any one of claims 17 to 26, characterized in that, Controlling the state of the storage container (220) to be closed, storing refrigerant, or releasing refrigerant includes: A valve assembly is provided, comprising a fifth control valve (221), a sixth control valve (222), a seventh control valve (223), and an eighth control valve (224). The fifth control valve (221) is connected between a first connecting pipe and a third connection port (220a) of the storage container (220). The first connecting pipe is a pipe connecting the outdoor heat exchanger (105) to the indoor heat exchanger (301) and the accumulator (201), respectively. The sixth control valve (222) is connected to the exhaust port of the compressor (101) and the accumulator (201). The seventh control valve (223) is connected between the connecting pipe between the second end of the accumulator (201) and the air inlet of the compressor (101) and the first connecting port (220c) of the storage container (220); the eighth control valve (224) is connected between the connecting pipe between the second end of the accumulator (201) and the air inlet of the compressor (101) and the second connecting port (220b) of the storage container (220). The fifth control valve (221), the sixth control valve (222), the seventh control valve (223), and the eighth control valve (224) are controlled to close, so that the storage container (220) enters the closed state; The fifth control valve (221) and the eighth control valve (224) are opened, and the sixth control valve (222) and the seventh control valve (223) are closed, so that the storage container (220) enters the refrigerant storage state; or The sixth control valve (222) and the seventh control valve (223) are opened, and the fifth control valve (221) and the eighth control valve (224) are closed, so that the storage container (220) enters the refrigerant release state.

28. The control method according to any one of claims 17 to 26, characterized in that, Controlling the state of the storage container (220) to be closed, storing refrigerant, or releasing refrigerant includes: A valve assembly is provided, including a tenth control valve (227) and an eleventh control valve (229). The tenth control valve (227) is connected between a first connecting pipe and a fourth connection port (220d) of the storage container (220). The first connecting pipe is a pipe that connects the outdoor heat exchanger (105) to the indoor heat exchanger (301) and the accumulator (201) respectively. The eleventh control valve (229) is connected between a connecting pipe between the second end of the accumulator (201) and the air inlet of the compressor (101) and a fifth connection port (220e) of the storage container (220). The tenth control valve (227) and the eleventh control valve (229) are closed to bring the storage container (220) into a closed state; Control the opening of the tenth control valve (227) and the eleventh control valve (229) to allow the storage container (220) to enter the refrigerant storage state; or The tenth control valve (227) is closed and the eleventh control valve (229) is opened, so that the storage container (220) enters the refrigerant release state.

29. A control device for an air conditioning system, comprising: The memory is configured to store instructions; A processor, coupled to a memory, configured to implement the control method as described in any one of claims 16 to 28 based on the execution of instructions stored in the memory.

30. A computer-readable storage medium, wherein, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the control method as described in any one of claims 16 to 28.

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