Air conditioning system, control method, control device and computer readable storage medium

Abstract

The present disclosure relates to an air conditioning system, a control method, a control device and a computer readable storage medium. The air conditioning system comprises: a compressor, an outdoor heat exchanger, at least two indoor heat exchangers, an accumulator comprising a first port and a second port, a first regulating valve located downstream of the compressor and connected with the outdoor heat exchanger, the accumulator and the indoor heat exchanger respectively, and a second regulating valve also located downstream of the compressor and connected with the accumulator and the indoor heat exchanger respectively, wherein the first regulating valve and the second regulating valve are configured to adjust their own valve positions, so that at least one of the outdoor heat exchanger, each indoor heat exchanger and the accumulator is configured as a condenser, and at least another one is configured as an evaporator; and the accumulator is configured as an evaporator, the first port is a refrigerant inlet end, and the second port is a refrigerant outlet end, as a condenser, the second port is a refrigerant inlet end, and the first port is a refrigerant outlet end. The present disclosure has simple pipeline setting and multiple working modes.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning, and more particularly to an air conditioning system, control method, control device, and computer-readable storage medium. Background Technology

[0002] Multi-split air conditioning systems suffer from problems such as complex piping design and high cost in order to achieve multiple modes. Summary of the Invention

[0003] Some embodiments of this disclosure provide an air conditioning system, control method, control device, and computer-readable storage medium for alleviating the problem of complex piping.

[0004] In one aspect of this disclosure, an air conditioning system is provided, comprising:

[0005] compressor;

[0006] Outdoor heat exchanger;

[0007] At least two indoor heat exchangers;

[0008] The energy storage device includes a first port and a second port;

[0009] A first regulating valve is located downstream of the compressor, and the first regulating valve is connected to the compressor, the outdoor heat exchanger, the accumulator, and the indoor heat exchanger, respectively; and

[0010] The second regulating valve is also located downstream of the compressor, and the second regulating valve is connected to the compressor, the accumulator, and the indoor heat exchanger respectively.

[0011] Wherein, the first regulating valve and the second regulating valve are configured to adjust their own valve positions such that at least one of the outdoor heat exchanger, the at least two indoor heat exchangers, and the accumulator is configured as a condenser and at least another is configured as an evaporator; and the accumulator is configured such that, in the evaporator state, the first port is the refrigerant inlet and the second port is the refrigerant outlet, and in the condenser state, the second port is the refrigerant inlet and the first port is the refrigerant outlet.

[0012] In some embodiments, the at least two indoor heat exchangers are arranged in parallel; the air conditioning system further includes:

[0013] One end of the liquid-side main pipe is connected to the first port of the accumulator and the outdoor heat exchanger respectively; the other end is connected to one end of the at least two indoor heat exchangers respectively.

[0014] A high-pressure gas pipe, one end of which is connected to the second regulating valve, and the other end of which is connected to the other end of each of the at least two indoor heat exchangers; and

[0015] The low-pressure gas pipe has one end connected to the second port of the accumulator and the inlet of the compressor, and the other end connected to the other end of the at least two indoor heat exchangers.

[0016] In some embodiments, the first regulating valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port;

[0017] The first valve port of the first regulating valve is connected to the outlet of the compressor, the second valve port of the first regulating valve is connected to one end of the outdoor heat exchanger, the third valve port of the first regulating valve is connected to the low-pressure gas pipe and the inlet of the compressor respectively; the fourth valve port of the first regulating valve is connected to the low-pressure gas pipe and the inlet of the compressor respectively through the first throttling element.

[0018] Wherein, when the first regulating valve is in the first valve position, the first valve port and the fourth valve port of the first regulating valve are connected, and the second valve port and the third valve port of the first regulating valve are connected.

[0019] When the first regulating valve is in the second valve position, the first valve port and the second valve port of the first regulating valve are connected, and the third valve port and the fourth valve port of the first regulating valve are connected.

[0020] In some embodiments, the second regulating valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port;

[0021] The first valve port of the second regulating valve is connected to the outlet of the compressor; the second valve port of the second regulating valve is connected to the low-pressure gas pipe and the inlet of the compressor respectively through the second throttling element; the third valve port of the second regulating valve is connected to the low-pressure gas pipe and the inlet of the compressor respectively; and the fourth valve port of the second regulating valve is connected to the high-pressure gas pipe.

[0022] Wherein, when the second regulating valve is in the first valve position, the first valve port and the fourth valve port of the second regulating valve are connected, and the second valve port and the third valve port of the second regulating valve are connected;

[0023] When the second regulating valve is in the second valve position, the first valve port and the second valve port of the second regulating valve are connected, and the third valve port and the fourth valve port of the second regulating valve are connected.

[0024] In some embodiments, the air conditioning system further includes:

[0025] The first subcooler includes a first flow path and a second flow path; the first flow path connects the liquid-side main pipe to the outdoor heat exchanger, and the second flow path is connected to the first regulating valve, the second regulating valve, the low-pressure gas pipe, and the inlet of the compressor, respectively.

[0026] In some embodiments, the air conditioning system further includes:

[0027] An outdoor expansion valve is located on the flow path connecting the first flow path and the outdoor heat exchanger.

[0028] In some embodiments, the air conditioning system further includes:

[0029] The subcooled expansion valve connects the first flow path and the second flow path.

[0030] In some embodiments, the air conditioning system further includes:

[0031] The first liquid pipe and the third liquid pipe, wherein the first port of the accumulator is connected to the liquid-side main pipe through the first liquid pipe and the third liquid pipe respectively; and

[0032] A bypass valve is provided on the liquid-side main pipe, and is located between the connection between the second end of the first liquid pipe and the liquid-side main pipe, and the connection between the second end of the third liquid pipe and the liquid-side main pipe.

[0033] In some embodiments, the air conditioning system further includes an energy storage expansion valve and a cold storage check valve disposed on the first liquid pipe, wherein the inlet of the cold storage check valve is connected to the liquid side main pipe and the outlet of the cold storage check valve is connected to the energy storage expansion valve.

[0034] In some embodiments, the air conditioning system further includes a cooling check valve disposed on the third liquid pipe, the inlet of the cooling check valve being connected to the first port of the accumulator.

[0035] In some embodiments, the air conditioning system further includes:

[0036] The first gas pipe has a first end connected to the high-pressure gas pipe and a second end connected to the first liquid pipe, and the connection between the second end of the first gas pipe and the first liquid pipe is located between the energy storage expansion valve and the cold storage one-way valve.

[0037] A high-pressure air valve is located in the first air pipe.

[0038] In some embodiments, the air conditioning system further includes:

[0039] The first gas pipe has a first end connected to the outlet of the compressor and a second end connected to the first liquid pipe, and the connection between the second end of the first gas pipe and the first liquid pipe is located between the energy storage expansion valve and the cold storage check valve.

[0040] A high-pressure air valve is located in the first air pipe.

[0041] In some embodiments, the air conditioning system further includes:

[0042] The second liquid pipe has a first end connected to the first liquid pipe and a second end connected to the second port of the accumulator. The connection point between the first end of the second liquid pipe and the first liquid pipe is located between the connection point between the second end of the first gas pipe and the first liquid pipe and the cold storage one-way valve.

[0043] A cooling valve is located on the second liquid pipe.

[0044] In some embodiments, the air conditioning system further includes a storage container, an inlet valve, a pressurizing valve, a drain valve, a gas balance valve, and two third throttling devices; the storage container has a first interface, a second interface, and a third interface;

[0045] The first interface of the storage container is connected to the liquid-side main pipe, and the connection between the first interface and the liquid-side main pipe is located between the bypass valve and the outdoor heat exchanger; the liquid inlet valve is located on the pipeline connecting the first interface and the liquid-side main pipe;

[0046] The second interface of the storage container is connected to the first air pipe; the pressurization valve is located on the pipe connecting the second interface and the first air pipe.

[0047] The second interface of the storage container is also connected to the low-pressure gas pipe; the gas balance valve is located on the pipeline connecting the second interface to the low-pressure gas pipe;

[0048] The third interface of the storage container is connected to the low-pressure gas pipe; the drain valve is located on the pipeline connecting the third interface to the low-pressure gas pipe.

[0049] Wherein, the connection point of the third interface to the low-pressure gas pipe is closer to the inlet of the compressor than the connection point of the second interface to the low-pressure gas pipe;

[0050] The two third throttling devices are respectively located on the pipeline connecting the third interface to the low-pressure gas pipe and on the pipeline connecting the second interface to the low-pressure gas pipe.

[0051] In some embodiments, the air conditioning system further includes a storage container, a drain valve, a gas balance valve, and a third throttling element; the storage container has a first interface and a second interface;

[0052] The first interface of the storage container is connected to the liquid-side main pipe, and the connection between the first interface and the liquid-side main pipe is located between the bypass valve and the outdoor heat exchanger; the gas balance valve is located on the pipeline connecting the first interface and the liquid-side main pipe.

[0053] The second interface of the storage container is connected to the low-pressure gas pipe; the drain valve is located on the pipeline connecting the second interface to the low-pressure gas pipe;

[0054] The third throttling device is located on the pipeline connecting the second interface and the low-pressure gas pipe.

[0055] In some embodiments, the air conditioning system further includes:

[0056] A heat release valve is provided, and the second port of the accumulator is connected to the low-pressure gas pipe via the heat release valve.

[0057] In some embodiments, the air conditioning system further includes a liquid distributor located at a first port of the accumulator.

[0058] In some embodiments, the air conditioning system further includes:

[0059] The fourth liquid pipe is connected at one end to the liquid-side main pipe and at the other end to one end of the indoor heat exchanger;

[0060] An indoor expansion valve is located in the fourth liquid pipe;

[0061] The third gas pipe has one end connected to the other end of the indoor heat exchanger, and the other end is divided into a first path and a second path. The first path is connected to the high-pressure gas pipe, and the second path is connected to the low-pressure gas pipe.

[0062] The refrigeration valve is located in the second path;

[0063] A heating valve is located in the third path.

[0064] In some embodiments, each of the indoor heat exchangers is independently provided with the fourth liquid pipe, the indoor expansion valve, the third gas pipe, the cooling valve, and the heating valve.

[0065] In one aspect of this disclosure, a control method for the air conditioning system described above is provided, the control method comprising:

[0066] Determine the operating mode of the air conditioning system;

[0067] The states of the outdoor heat exchanger, indoor heat exchanger, accumulator, first regulating valve, and second regulating valve in the air conditioning system are controlled according to the preset control strategy corresponding to the working mode.

[0068] In some embodiments, determining the operating mode of the air conditioning system includes:

[0069] During periods when the power supply system has high electricity prices, the operating mode of the air conditioning system is determined to be a mode corresponding to the energy storage device being in a non-working state, a cooling release state, or a heat release state; during periods when the power supply system has low electricity prices, the operating mode of the air conditioning system is determined to be a mode corresponding to the energy storage device being in a non-working state, a cooling storage state, or a heat storage state.

[0070] In some embodiments, the operating mode of the air conditioning system includes a normal full cooling mode; in the normal full cooling mode, the first regulating valve is in the second valve position, the second regulating valve is in the second valve position, and the accumulator is in a non-operating state; the outdoor heat exchanger is used as a condenser, and the indoor heat exchanger is used as an evaporator.

[0071] In some embodiments, the operating mode of the air conditioning system includes a conventional main cooling mode; in the conventional main cooling mode, the first regulating valve is in the second valve position, the second regulating valve is in the first valve position, and the accumulator is in a non-operating state; the outdoor heat exchanger is used as a condenser, part of the indoor heat exchanger is used as an evaporator, and another part of the indoor heat exchanger is used as a condenser; the evaporation load of the indoor heat exchanger used as an evaporator is greater than the condensation load of the indoor heat exchanger used as a condenser.

[0072] In some embodiments, the operating mode of the air conditioning system includes a full cold storage mode; in the full cold storage mode, the first regulating valve is in the second valve position, the second regulating valve is in the second valve position, the indoor heat exchanger is not working, the outdoor heat exchanger is used as a condenser, and the accumulator is used as an evaporator.

[0073] In some embodiments, the operating mode of the air conditioning system includes a cold storage and full cooling mode; in the cold storage and full cooling mode, the first regulating valve is in the second valve position, the second regulating valve is in the second valve position, the outdoor heat exchanger is used as a condenser, the energy storage device is used as an evaporator, and the indoor heat exchanger is also used as an evaporator.

[0074] In some embodiments, the operating mode of the air conditioning system includes a cold storage and full heating mode; in the cold storage and full heating mode, the first regulating valve is located in the second valve position, the second regulating valve is located in the first valve position, the outdoor heat exchanger is used as a condenser, the energy storage device is used as an evaporator, and the indoor heat exchanger is used as a condenser.

[0075] In some embodiments, the operating mode of the air conditioning system includes a cold storage and full heating mode; in the cold storage and full heating mode, the first regulating valve is located in the first valve position, the second regulating valve is located in the first valve position, the outdoor heat exchanger is used as an evaporator, the energy storage device is used as an evaporator, and the indoor heat exchanger is used as a condenser.

[0076] In some embodiments, the air conditioning system operates in a mode that includes both cold storage and main cooling. In the cold storage and main cooling mode, the first regulating valve is in the second valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as a condenser, the energy storage device is used as an evaporator, a portion of the indoor heat exchangers are used as evaporators, and another portion of the indoor heat exchangers are used as condensers. The evaporation load of the indoor heat exchanger acting as an evaporator is greater than the condensation load of the indoor heat exchanger acting as a condenser.

[0077] In some embodiments, the air conditioning system operates in a mode that includes both cold storage and main heating. In the cold storage and main heating mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as an evaporator, the energy storage device is used as an evaporator, a portion of the indoor heat exchangers is used as an evaporator, and another portion of the indoor heat exchangers is used as a condenser. The evaporation load of the indoor heat exchanger acting as an evaporator is less than the condensation load of the indoor heat exchanger acting as a condenser.

[0078] In some embodiments, the air conditioning system operates in a mode that includes both cold storage and main heating. In the cold storage and main heating mode, the first regulating valve is in the second valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as a condenser, the energy storage device is used as an evaporator, a portion of the indoor heat exchangers are used as evaporators, and another portion of the indoor heat exchangers are used as condensers. The evaporation load of the indoor heat exchanger acting as an evaporator is less than the condensation load of the indoor heat exchanger acting as a condenser.

[0079] In some embodiments, the operating mode of the air conditioning system includes a subcooling and releasing cooling mode with simultaneous full cooling; in the subcooling and releasing cooling mode with simultaneous full cooling, the first regulating valve is in the second valve position, the second regulating valve is in the second valve position, the outdoor heat exchanger is used as a condenser, the accumulator is used as a subcooler, and the indoor heat exchanger is used as an evaporator.

[0080] In some embodiments, the air conditioning system operates in a mode that includes subcooling and releasing cooling while simultaneously cooling the main system. In this mode, the first regulating valve is in the second valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as a condenser, the accumulator is used as a subcooler, a portion of the indoor heat exchangers is used as an evaporator, and another portion of the indoor heat exchangers is used as a condenser. The evaporation load of the indoor heat exchanger acting as an evaporator is greater than the condensation load of the indoor heat exchanger acting as a condenser.

[0081] In some embodiments, the operating mode of the air conditioning system includes a condensation and cooling mode with simultaneous full cooling; in the condensation and cooling mode with simultaneous full cooling, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is not working, the accumulator is used as a condenser, and the indoor heat exchanger is used as an evaporator.

[0082] In some embodiments, the air conditioning system operates in a mode that includes condensation and cooling release while simultaneously cooling the main system. In this mode, the first regulating valve and the second regulating valve are both in the first valve position. The outdoor heat exchanger is not in operation, the accumulator is used as a condenser, a portion of the indoor heat exchangers are used as evaporators, and another portion of the indoor heat exchangers are used as condensers. The evaporation load of the indoor heat exchanger acting as an evaporator is greater than the condensation load of the indoor heat exchanger acting as a condenser.

[0083] In some embodiments, the air conditioning system operates in a parallel cooling and full cooling mode; in the parallel cooling and full cooling mode, the first regulating valve is in the second valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as a condenser, the accumulator is used as a condenser, and the indoor heat exchanger is used as an evaporator.

[0084] In some embodiments, the air conditioning system operates in a parallel cooling release and main cooling mode. In the parallel cooling release and main cooling mode, the first regulating valve is in the second valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as a condenser, the accumulator is used as a condenser, a portion of the indoor heat exchangers is used as an evaporator, and another portion of the indoor heat exchangers is used as a condenser. The evaporation load of the indoor heat exchanger used as an evaporator is greater than the condensation load of the indoor heat exchanger used as a condenser.

[0085] In some embodiments, the operating mode of the air conditioning system includes a normal full heating mode; in the normal full heating mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as an evaporator, the accumulator is not working, and the indoor heat exchanger is used as a condenser.

[0086] In some embodiments, the operating mode of the air conditioning system includes a conventional main heating mode; in the conventional main heating mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as an evaporator, the accumulator is not working, part of the indoor heat exchangers is used as evaporators, and another part of the indoor heat exchangers is used as condensers; the evaporation load of the indoor heat exchangers used as evaporators is less than the condensation load of the indoor heat exchangers used as condensers.

[0087] In some embodiments, the operating mode of the air conditioning system includes a full heat storage mode; in the full heat storage mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as an evaporator, the accumulator is used as a condenser, and the indoor heat exchanger is not in operation.

[0088] In some embodiments, the operating mode of the air conditioning system includes a heat storage and full heating mode; in the heat storage and full heating mode, the first regulating valve is located in the first valve position, the second regulating valve is located in the first valve position, the outdoor heat exchanger is used as an evaporator, the energy storage device is used as a condenser, and the indoor heat exchanger is used as a condenser.

[0089] In some embodiments, the operating mode of the air conditioning system includes a heat storage and full cooling mode; in the heat storage and full cooling mode, the first regulating valve is located in the first valve position, the second regulating valve is located in the first valve position, the outdoor heat exchanger is used as an evaporator, the energy storage device is used as a condenser, and the indoor heat exchanger is used as an evaporator.

[0090] In some embodiments, the operating mode of the air conditioning system includes a heat storage and full cooling mode; in the heat storage and full cooling mode, the first regulating valve is located in the second valve position, the second regulating valve is located in the first valve position, the outdoor heat exchanger is used as a condenser, the energy storage device is used as a condenser, and the indoor heat exchanger is used as an evaporator.

[0091] In some embodiments, the air conditioning system operates in a mode that includes both heat storage and main heating. In the mode of heat storage and main heating, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as an evaporator, the energy storage device is used as a condenser, a portion of the indoor heat exchangers are used as evaporators, and another portion of the indoor heat exchangers are used as condensers. The evaporation load of the indoor heat exchangers used as evaporators is less than the condensation load of the indoor heat exchangers used as condensers.

[0092] In some embodiments, the air conditioning system operates in a mode that includes heat storage and main cooling simultaneously. In the mode of heat storage and main cooling simultaneously, the first regulating valve is in the second valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as a condenser, the energy storage device is used as a condenser, a portion of the indoor heat exchangers is used as an evaporator, and another portion of the indoor heat exchangers is used as a condenser. The evaporation load of the indoor heat exchanger used as an evaporator is greater than the condensation load of the indoor heat exchanger used as a condenser.

[0093] In some embodiments, the air conditioning system operates in a mode that includes heat storage and simultaneous main cooling. In the heat storage and simultaneous main cooling mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as an evaporator, the energy storage device is used as a condenser, a portion of the indoor heat exchangers are used as evaporators, and another portion of the indoor heat exchangers are used as condensers. The evaporation load of the indoor heat exchangers used as evaporators is greater than the condensation load of the indoor heat exchangers used as condensers.

[0094] In some embodiments, the operating mode of the air conditioning system includes a mixed heat release and full heating mode; in the mixed heat release and full heating mode, the first regulating valve is located in the first valve position, the second regulating valve is located in the first valve position, the outdoor heat exchanger is used as an evaporator, the energy accumulator is used as an evaporator, and the indoor heat exchanger is used as a condenser.

[0095] In some embodiments, the air conditioning system operates in a mixed heat release and main heating mode. In the mixed heat release and main heating mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is used as an evaporator, the accumulator is used as an evaporator, a portion of the indoor heat exchangers is used as an evaporator, and another portion of the indoor heat exchangers is used as a condenser. The evaporation load of the indoor heat exchanger used as an evaporator is less than the condensation load of the indoor heat exchanger used as a condenser.

[0096] In some embodiments, the operating mode of the air conditioning system includes an independent heat release and full heating mode; in the independent heat release and full heating mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is not working, the accumulator is used as an evaporator, and the indoor heat exchanger is used as a condenser.

[0097] In some embodiments, the air conditioning system operates in a mode that includes independent heat release and simultaneous main heating. In the independent heat release and simultaneous main heating mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is not working, the accumulator is used as an evaporator, part of the indoor heat exchanger is used as an evaporator, and another part of the indoor heat exchanger is used as a condenser. The evaporation load of the indoor heat exchanger used as an evaporator is less than the condensation load of the indoor heat exchanger used as a condenser.

[0098] In some embodiments, the operating mode of the air conditioning system includes a discontinuous heating defrosting mode; in the discontinuous heating defrosting mode, the first regulating valve is in the second valve position, the second regulating valve is in the second valve position, the outdoor heat exchanger is used as a condenser, the accumulator is used as an evaporator, and the indoor heat exchanger is not working.

[0099] In some embodiments, the operating modes of the air conditioning system include a continuous heating and defrosting mode and a full heating mode; in the continuous heating and defrosting mode and full heating mode, the first regulating valve is located in the second valve position, the second regulating valve is located in the first valve position, the outdoor heat exchanger is used as a condenser, the accumulator is used as an evaporator, and the indoor heat exchanger is used as a condenser.

[0100] In some embodiments, the operating mode of the air conditioning system includes a continuous heating and defrosting mode with main heating mode; in the continuous heating and defrosting mode with main heating mode, the first regulating valve is located in the second valve position, the second regulating valve is located in the first valve position, the outdoor heat exchanger is used as a condenser, the accumulator is used as an evaporator, a portion of the indoor heat exchangers are used as evaporators, and another portion of the indoor heat exchangers are used as condensers, wherein the evaporation load of the indoor heat exchanger used as an evaporator is less than the condensation load of the indoor heat exchanger used as a condenser.

[0101] In some embodiments, the operating mode of the air conditioning system includes continuous heating and defrosting with main cooling mode; in the continuous heating and defrosting with main cooling mode, the first regulating valve is located in the second valve position, the second regulating valve is located in the first valve position, the outdoor heat exchanger is used as a condenser, the accumulator is used as an evaporator, a portion of the indoor heat exchangers are used as evaporators, and another portion of the indoor heat exchangers are used as condensers, wherein the evaporation load of the indoor heat exchanger used as an evaporator is greater than the condensation load of the indoor heat exchanger used as a condenser.

[0102] In some embodiments, the operating mode of the air conditioning system includes a conventional heat recovery mode; in the conventional heat recovery mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is not working, the accumulator is not working, part of the indoor heat exchanger is used as an evaporator, and another part of the indoor heat exchanger is used as a condenser, and the evaporation load of the indoor heat exchanger used as an evaporator is equal to the condensation load of the indoor heat exchanger used as a condenser.

[0103] In some embodiments, the air conditioning system operates in a mode that includes both cold storage and heat recovery. In this mode, the first regulating valve and the second regulating valve are both in the first valve position. The outdoor heat exchanger is not in operation. The accumulator is used as an evaporator, a portion of the indoor heat exchangers are used as evaporators, and another portion of the indoor heat exchangers are used as condensers. The evaporation load of the indoor heat exchangers used as evaporators is less than the condensation load of the indoor heat exchangers used as condensers.

[0104] In some embodiments, the operating mode of the air conditioning system includes a heat storage and heat recovery mode; in the heat storage and heat recovery mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is not working, the accumulator is used as a condenser, part of the indoor heat exchanger is used as an evaporator, and another part of the indoor heat exchanger is used as a condenser, and the evaporation load of the indoor heat exchanger used as an evaporator is greater than the condensation load of the indoor heat exchanger used as a condenser.

[0105] In some embodiments, the air conditioning system operates in a mode that includes simultaneous cooling and heat recovery. In this mode, the first regulating valve and the second regulating valve are both in the first valve position. The outdoor heat exchanger is not in operation, the accumulator is used as a condenser, a portion of the indoor heat exchangers are used as evaporators, and another portion of the indoor heat exchangers are used as condensers. The evaporation load of the indoor heat exchanger used as an evaporator is greater than the condensation load of the indoor heat exchanger used as a condenser.

[0106] In some embodiments, the operating mode of the air conditioning system includes a heat release and heat recovery mode; in the heat release and heat recovery mode, the first regulating valve is in the first valve position, the second regulating valve is in the first valve position, the outdoor heat exchanger is not working, the accumulator is used as an evaporator, part of the indoor heat exchanger is used as an evaporator, and another part of the indoor heat exchanger is used as a condenser, and the evaporation load of the indoor heat exchanger used as an evaporator is less than the condensation load of the indoor heat exchanger used as a condenser.

[0107] In one aspect of this disclosure, a control device for an air conditioning system is provided, comprising:

[0108] The memory is configured to store instructions;

[0109] A processor, coupled to the memory, is configured to execute instructions stored in the memory to implement the control method of the air conditioning system described above.

[0110] In one aspect of this disclosure, 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 of the air conditioning system described above.

[0111] Based on the above technical solution, this disclosure has at least the following beneficial effects:

[0112] In some embodiments, by using a bidirectional refrigerant accumulator in conjunction with a first regulating valve and a second regulating valve, continuous heating and defrosting functions, as well as heat recovery and energy storage functions, can be achieved. Furthermore, the bidirectional refrigerant accumulator facilitates uniform distribution of liquid refrigerant entering the accumulator and reduces pressure loss when gaseous refrigerant enters. The accumulator can store energy during off-peak electricity periods and release it during peak periods, reducing system power consumption at these times and enabling continuous heating during defrosting. This significantly expands the application range of the energy storage system, increases indoor comfort during defrosting, and offers a wide range of functions to meet diverse user needs. Attached Figure Description

[0113] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this disclosure, illustrate exemplary embodiments of the present disclosure and are used to explain the disclosure, but do not constitute an undue limitation of the disclosure. In the drawings:

[0114] Figure 1 This is a schematic diagram of an air conditioning system provided according to some embodiments of the present disclosure.

[0115] Figure 2 This is a schematic diagram of refrigerant flow in the outdoor unit of an air conditioning system provided according to some embodiments of the present disclosure in a fully condensed state.

[0116] Figure 3 This is a schematic diagram of refrigerant flow in the outdoor unit of an air conditioning system provided according to some embodiments of the present disclosure in the main condensing state.

[0117] Figure 4 This is a schematic diagram of refrigerant flow in the outdoor unit of an air conditioning system provided according to some embodiments of the present disclosure in a fully evaporating state.

[0118] Figure 5 This is a schematic diagram of refrigerant flow in the outdoor unit of an air conditioning system provided according to some embodiments of the present disclosure in the main evaporation state.

[0119] Figure 6 This is a schematic diagram of refrigerant flow in the outdoor unit of an air conditioning system provided according to some embodiments of the present disclosure when the outdoor heat exchanger is turned off.

[0120] Figure 7 This is a schematic diagram of refrigerant flow in an air conditioning system provided according to some embodiments of the present disclosure, in the form of an evaporator.

[0121] Figure 8 This is a schematic diagram of refrigerant flow in an air conditioning system provided according to some embodiments of the present disclosure, in the form of a subcooler.

[0122] Figure 9This is a schematic diagram of refrigerant flow in an air conditioning system provided according to some embodiments of the present disclosure, in the form of a condenser.

[0123] Figure 10 This is a schematic diagram of refrigerant flow in the indoor heat exchanger of an air conditioning system provided according to some embodiments of the present disclosure, in the form of an evaporator.

[0124] Figure 11 This is a schematic diagram of refrigerant flow in the indoor heat exchanger of an air conditioning system provided according to some embodiments of the present disclosure, in the form of a condenser.

[0125] Figure 12 This is a schematic diagram of an air conditioning system provided according to other embodiments of the present disclosure.

[0126] Figure 13 This is a schematic diagram of an air conditioning system with a storage container provided according to some embodiments of the present disclosure.

[0127] Figure 14 This is a schematic diagram of refrigerant flow in a storage container storing refrigerant according to some embodiments of the present disclosure.

[0128] Figure 15 This is a schematic diagram of refrigerant flow in a storage container under refrigerant release conditions according to some embodiments of the present disclosure.

[0129] Figure 16 This is a schematic diagram of an air conditioning system with a storage container provided according to other embodiments of the present disclosure.

[0130] Figure 17 This is a schematic diagram of refrigerant flow in a storage container storing refrigerant according to other embodiments of the present disclosure.

[0131] Figure 18 This is a schematic diagram of refrigerant flow in a storage container under refrigerant release conditions according to other embodiments of the present disclosure.

[0132] Figure label:

[0133] 1-Outdoor unit; 2-Energy storage unit; 3-Liquid side main pipe; 4-High-pressure gas pipe; 5-Low-pressure gas pipe; 6-Mode switching unit;

[0134] 101-Compressor; 102-First regulating valve; 103-Second regulating valve; 104-Outdoor heat exchanger; 105-Outdoor expansion valve; 106-Subcooled expansion valve; 107-First subcooler; 108-Gas-liquid separator;

[0135] 201-Accumulator; 201a-First port; 201b-Second port; 202-First gas pipe; 203-Second gas pipe; 204-First liquid pipe; 205-Second liquid pipe; 206-Accumulation expansion valve; 207-Cold storage check valve; 208-High-pressure gas valve; 209-Cold release check valve; 210-Heat release valve; 211-Bypass valve; 212-Cold release valve; 213-Third liquid pipe; 214-Distributor;

[0136] 220 - Storage container; 220a - First interface; 220b - Second interface; 220c - Third interface; 220a' - Fourth interface; 220c' - Fifth interface; 221 - Inlet valve; 222 - Pressurization valve; 223 - Drain valve; 224 - Gas balance valve; 225 - Third throttling element;

[0137] 301-Liquid pipe expansion valve;

[0138] 601 - Second subcooler; 602 - Refrigeration valve; 603 - Heating valve; 604 - Fourth liquid pipe; 605 - Third gas pipe;

[0139] 7-Indoor heat exchanger; 701-Indoor expansion valve.

[0140] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0141] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein.

[0142] The terms “first,” “second,” and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as “including” or “contains” mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0143] Figure 1 This is a structural schematic diagram of some embodiments of the air conditioning system according to this disclosure. (Reference) Figure 1 In some embodiments, the air conditioning system includes a compressor 101, an outdoor heat exchanger 104, at least two indoor heat exchangers 7, an accumulator 201, a first regulating valve 102, and a second regulating valve 103.

[0144] The energy storage device 201 includes a first port 201a and a second port 201b.

[0145] The first regulating valve 102 is located downstream of the compressor 101, and the first regulating valve 102 is connected to the compressor 101, the outdoor heat exchanger 104, the accumulator 201 and the indoor heat exchanger 7 respectively.

[0146] The second regulating valve 103 is also located downstream of the compressor 101, and the second regulating valve 103 is connected to the compressor 101, the accumulator 201, and the indoor heat exchanger 7 respectively.

[0147] The first regulating valve 102 and the second regulating valve 103 are configured to adjust their own valve positions such that at least one of the outdoor heat exchanger 104, at least two indoor heat exchangers 7, and accumulator 201 is configured as a condenser, and at least another is configured as an evaporator. The accumulator 201 is configured such that, in its evaporator state, the first port 201a is the refrigerant inlet and the second port 201b is the refrigerant outlet; and in its condenser state, the second port 201b is the refrigerant inlet and the first port 201a is the refrigerant outlet.

[0148] The accumulator 201 is also configured such that, in subcooler mode, the second port 201b is the refrigerant inlet and the first port 201a is the refrigerant outlet.

[0149] The accumulator 201 is located between the outdoor heat exchanger 104 and the indoor heat exchanger 7.

[0150] In this embodiment, the accumulator 201 is filled with an energy storage material, such as organic phase change materials like ice water and paraffin wax, or inorganic phase change materials like mirabilite. The accumulator 201 is equipped with a refrigerant pipe, through which the refrigerant flows and exchanges heat sufficiently with the energy storage material, enabling both cold storage and heat release.

[0151] In this embodiment of the present disclosure, the accumulator 201 is capable of bidirectional refrigerant intake. When the accumulator 201 is used as an evaporator, the first port 201a is the refrigerant inlet and the second port 201b is the refrigerant outlet. When the accumulator 201 is used as a condenser, the second port 201b is the refrigerant inlet and the first port 201a is the refrigerant outlet. That is, during the cold storage and cold release processes, the refrigerant flows in opposite directions in the accumulator 201.

[0152] During cold storage, the refrigerant temperature gradually increases along the flow path. Therefore, at the end of cold storage, the temperature of the energy storage material in accumulator 201 also exhibits a distribution pattern from low to high. When releasing cold, the high-temperature refrigerant flows into accumulator 201 from the other end, in the opposite direction. At this time, with heat exchange with the energy storage material whose temperature distribution is from high to low, more complete heat exchange (counter-current heat exchange) is achieved, resulting in a lower refrigerant temperature and better performance.

[0153] Furthermore, in the embodiments provided in this disclosure, the bidirectional refrigerant accumulator 201, in conjunction with the first regulating valve 102 and the second regulating valve 103, can achieve continuous heating and defrosting functions, as well as heat recovery and energy storage functions. The bidirectional refrigerant accumulator 201 not only facilitates uniform distribution of liquid refrigerant entering the accumulator 201, but also reduces pressure loss when gaseous refrigerant enters the accumulator 201.

[0154] In some embodiments, the air conditioning system further includes a distributor 214, which is located at the first port 201a of the accumulator 201.

[0155] Optionally, the dispenser 214 includes a capillary tube.

[0156] A distributor 214 is provided at the first port 201a of the accumulator 201. The distributor 214 can be used to evenly distribute the refrigerant into each flow line of the accumulator 201, thereby reducing the flow loss of the refrigerant during the flow process.

[0157] Liquid refrigerant enters accumulator 201 from the first port 201a through distributor 214, ensuring uniform liquid distribution. Gaseous refrigerant enters accumulator 201 from the second port 201b, reducing pressure loss when entering accumulator 201.

[0158] In this embodiment, the flow direction of the refrigerant within the accumulator 201 when it is in the state of storing cold energy is opposite to the flow direction when it is in the state of releasing cold energy. This has the added benefit of allowing liquid refrigerant to enter and exit from one port of the accumulator 201, while gaseous refrigerant enters and exits from the other port, regardless of whether it is in the state of storing or releasing cold energy. This avoids the situation where liquid and gaseous refrigerant sometimes enter and exit from the same port. This also allows for the installation of a distributor at the inlet and outlet of the liquid refrigerant, without increasing the pressure loss of the refrigerant flow due to the intermittent entry and exit of gaseous refrigerant.

[0159] In addition, during continuous heating and defrosting, the accumulator 201 bears the entire evaporation load due to the simultaneous condensation of the indoor and outdoor units, resulting in a large load. Moreover, the defrosting demand is often rapid and short-term, causing the accumulator expansion valve 206 to open rapidly due to the increased amount of refrigerant entering the accumulator 201 for evaporation, leading to insufficient throttling effect and excessively high evaporation temperature. However, the presence of a capillary tube in the distributor 214 can compensate for the throttling effect, ensuring that the refrigerant is fully throttled before entering the accumulator 201 for evaporation.

[0160] The indoor unit here refers to the indoor unit part including the indoor heat exchanger 7, and the outdoor unit refers to the outdoor unit part 1 including the outdoor heat exchanger 104.

[0161] In some embodiments, at least two indoor heat exchangers 7 are arranged in parallel.

[0162] This disclosure discloses an energy storage system based on a heat recovery air conditioner design, which has a simple pipeline but can switch between multiple working modes. It utilizes a specially designed bidirectional refrigerant inlet method in the distributor to ensure uniform distribution of liquid refrigerant when it enters the energy storage unit 201 and reduce pressure loss when gaseous refrigerant enters the energy storage unit 201.

[0163] In some embodiments, the air conditioning system further includes a liquid-side main pipe 3, one end of which is connected to the first port 201a of the accumulator 201 and the outdoor heat exchanger 104 respectively; the other end of the liquid-side main pipe 3 is connected to one end of at least two indoor heat exchangers 7 respectively.

[0164] In some embodiments, the air conditioning system further includes a high-pressure gas pipe 4, one end of which is connected to the second regulating valve 103 and the second port 201b of the accumulator 201, and the other end of which is connected to the other end of at least two indoor heat exchangers 7.

[0165] In some embodiments, the air conditioning system further includes a low-pressure gas pipe 5, one end of which is connected to the second port 201b of the accumulator 201 and the inlet of the compressor 101, respectively, and the other end of the low-pressure gas pipe 5 is connected to the other end of at least two indoor heat exchangers 7.

[0166] In some embodiments, the first regulating valve 102 includes a first valve port D, a second valve port C, a third valve port S, and a fourth valve port E.

[0167] The first valve port D of the first regulating valve 102 is connected to the outlet of the compressor 101, the second valve port C of the first regulating valve 102 is connected to one end of the outdoor heat exchanger 104, the third valve port S of the first regulating valve 102 is connected to the low-pressure gas pipe 5 and the inlet of the compressor 101 respectively, and the fourth valve port E of the first regulating valve 102 is connected to the low-pressure gas pipe 5 and the inlet of the compressor 101 respectively through the first throttling element.

[0168] When the first regulating valve 102 is in the first valve position, the first valve port D and the fourth valve port E of the first regulating valve 102 are connected, and the second valve port C and the third valve port S of the first regulating valve 102 are connected.

[0169] When the first regulating valve 102 is in the second valve position, the first valve port D and the second valve port C of the first regulating valve 102 are connected, and the third valve port S and the fourth valve port E of the first regulating valve 102 are connected.

[0170] The first regulating valve 102 is in the first valve position when energized and in the second valve position when de-energized, or the first regulating valve 102 is in the first valve position when de-energized and in the second valve position when energized.

[0171] Optionally, the first regulating valve 102 includes a four-way valve.

[0172] Optionally, the first throttling element includes a capillary.

[0173] In some embodiments, the second regulating valve 103 includes a first valve port D, a second valve port C, a third valve port S, and a fourth valve port E.

[0174] The first valve port D of the second regulating valve 103 is connected to the outlet of the compressor 101. The second valve port C of the second regulating valve 103 is connected to the low-pressure gas pipe 5 and the inlet of the compressor 101 respectively through the second throttling element. The third valve port S of the second regulating valve 103 is connected to the low-pressure gas pipe 5 and the inlet of the compressor 101 respectively. The fourth valve port E of the second regulating valve 103 is connected to the high-pressure gas pipe 4.

[0175] When the second regulating valve 103 is in the first valve position, the first valve port D and the fourth valve port E of the second regulating valve 103 are connected, and the second valve port C and the third valve port S of the second regulating valve 103 are connected.

[0176] When the second regulating valve 103 is in the second valve position, the first valve port D and the second valve port C of the second regulating valve 103 are connected, and the third valve port S and the fourth valve port E of the second regulating valve 103 are connected.

[0177] The second regulating valve 103 is in the first valve position when energized and in the second valve position when de-energized, or the second regulating valve 103 is in the first valve position when de-energized and in the second valve position when energized.

[0178] Optionally, the second regulating valve 103 includes a four-way valve.

[0179] Optionally, the second throttling element includes a capillary.

[0180] Two regulating valves are provided, namely the first regulating valve 102 and the second regulating valve 103. By combining the valve positions of these two regulating valves, the refrigerant discharged by the compressor 101 can be controlled to enter the outdoor side and / or the indoor side and / or the accumulator side, which is a key component for realizing multiple modes.

[0181] In some embodiments, the air conditioning system further includes an outdoor expansion valve 105, which is located on the pipeline connecting the liquid-side main pipe 3 and the outdoor heat exchanger 104.

[0182] When the outdoor expansion valve 105 is opened, the pipeline between the liquid-side main pipe 3 and the outdoor heat exchanger 104 is connected; when the outdoor expansion valve 105 is closed, the pipeline between the liquid-side main pipe 3 and the outdoor heat exchanger 104 is disconnected.

[0183] Optionally, the outdoor expansion valve 105 includes an electronic expansion valve.

[0184] In some embodiments, the air conditioning system further includes a first subcooler 107, which includes a first flow path and a second flow path; the first flow path connects the liquid-side main pipe 3 to the outdoor heat exchanger 104, and the second flow path is connected to the first regulating valve 102, the second regulating valve 103, the low-pressure gas pipe 5, and the inlet of the compressor 101, respectively.

[0185] The refrigerant in the liquid-side main pipe 3 can flow into the outdoor heat exchanger 104 through the first flow path of the first subcooler 107. Alternatively, the refrigerant passing through the outdoor heat exchanger 104 can also flow into the liquid-side main pipe 3 through the first flow path of the first subcooler 107.

[0186] In some embodiments, the outdoor expansion valve 105 is located on the flow path that connects the first flow path to the outdoor heat exchanger 104.

[0187] The refrigerant in the liquid-side main pipe 3 can flow into the outdoor heat exchanger 104 in sequence through the first flow path of the first subcooler 107 and the outdoor expansion valve 105. Alternatively, the refrigerant passing through the outdoor heat exchanger 104 can also flow into the liquid-side main pipe 3 in sequence through the outdoor expansion valve 105 and the first flow path of the first subcooler 107.

[0188] In some embodiments, the air conditioning system further includes a subcooling expansion valve 106, which is connected to a first flow path and a second flow path.

[0189] When the subcooled expansion valve 106 is opened, the first flow path and the second flow path are connected; when the subcooled expansion valve 106 is closed, the first flow path and the second flow path are disconnected.

[0190] Optionally, the subcooled expansion valve includes an electronic expansion valve.

[0191] In some embodiments, the air conditioning system further includes a first liquid pipe 204 and a third liquid pipe 213. The first port 201a of the accumulator 201 is connected to the liquid-side main pipe 3 through the first liquid pipe 204, and the first port 201a of the accumulator 201 is also connected to the liquid-side main pipe 3 through the third liquid pipe 213.

[0192] In some embodiments, the air conditioning system further includes a bypass valve 211, which is disposed on the liquid-side main pipe 3 and located between the connection between the second end of the first liquid pipe 204 and the liquid-side main pipe 3 and the connection between the second end of the third liquid pipe 213 and the liquid-side main pipe 3.

[0193] When bypass valve 211 is opened, the liquid-side main pipe 3 is connected between the second end of the first liquid pipe 204 and the liquid-side main pipe 3, and between the second end of the third liquid pipe 213 and the liquid-side main pipe 3. When bypass valve 211 is closed, the liquid-side main pipe 3 is disconnected between the second end of the first liquid pipe 204 and the liquid-side main pipe 3, and between the second end of the third liquid pipe 213 and the liquid-side main pipe 3.

[0194] In some embodiments, the air conditioning system further includes an energy storage expansion valve 206 disposed on the first liquid pipe 204.

[0195] When the energy storage expansion valve 206 is opened, the pipeline between the first liquid pipe 204 and the first port 201a of the accumulator 201 is connected; when the energy storage expansion valve 206 is closed, the pipeline between the first liquid pipe 204 and the first port 201a of the accumulator 201 is disconnected.

[0196] Optionally, the energy storage expansion valve 206 includes an electronic expansion valve.

[0197] In some embodiments, the air conditioning system further includes a cold storage check valve 207 disposed on the first liquid pipe 204. The inlet of the cold storage check valve 207 is connected to the liquid-side main pipe 3, and the outlet of the cold storage check valve 207 is connected to the energy storage expansion valve 206. The refrigerant flows in the direction from the inlet to the outlet of the cold storage check valve 207.

[0198] In some embodiments, the air conditioning system further includes a refrigerant release check valve 209 disposed on the third liquid line 213, the inlet of which is connected to the first port 201a of the accumulator 201. The refrigerant flows in the direction from the inlet to the outlet of the refrigerant release check valve 209.

[0199] The throttling effect can be achieved by opening the energy storage expansion valve 206, which causes the refrigerant to evaporate in the energy storage unit, thus realizing the cold storage process. Alternatively, the flow of refrigerant in the first liquid pipe 204 can be blocked by closing the energy storage expansion valve 206, which causes the refrigerant to flow through the cold release check valve 209 under the action of pressure difference and enter the liquid side main pipe 3.

[0200] In some embodiments, the air conditioning system further includes a first gas pipe 202, a first end of which is connected to a high-pressure gas pipe 4, a second end of which is connected to a first liquid pipe 204, and the connection between the second end of the first gas pipe 202 and the first liquid pipe 204 is located between the energy storage expansion valve 206 and the cold storage check valve 207.

[0201] In some embodiments, the air conditioning system further includes a high-pressure valve 208, which is disposed in the first gas pipe 202.

[0202] The high-pressure, high-temperature refrigerant discharged from the compressor can be controlled to enter the accumulator 201 by controlling the opening / closing state of the high-pressure gas valve 208.

[0203] refer to Figure 12 In some other embodiments, the air conditioning system further includes a first gas pipe 202, a first end of which is connected to the outlet of the compressor 101, a second end of which is connected to a first liquid pipe 204, and the connection between the second end of the first gas pipe 202 and the first liquid pipe 204 is located between the energy storage expansion valve 206 and the cold storage check valve 207.

[0204] In other embodiments, the air conditioning system also includes a high-pressure valve 208, which is located in the first gas pipe 202.

[0205] refer to Figure 1 In some embodiments, the air conditioning system further includes a second liquid pipe 205, the first end of which is connected to the first liquid pipe 204, and the second end of which is connected to the second port 201b of the accumulator 201. The connection between the first end of the second liquid pipe 205 and the first liquid pipe 204 is located between the connection between the second end of the first gas pipe 202 and the first liquid pipe 204 and the cold storage one-way valve 207.

[0206] In some embodiments, the air conditioning system further includes a cooling valve 212, which is disposed on the second liquid pipe 205.

[0207] When the cooling valve 212 is opened, the second liquid pipe 205 is connected; when the cooling valve 212 is closed, the second liquid pipe 205 is disconnected.

[0208] refer to Figure 1 In some embodiments, the air conditioning system also includes a heat release valve 210, through which the second port 201b of the accumulator 201 is connected to the low-pressure gas pipe 5.

[0209] When the heat release valve 210 is opened, the pipeline between the second port 201b of the accumulator 201 and the second gas pipe 203 is connected. When the heat release valve 210 is closed, the pipeline between the second port 201b of the accumulator 201 and the second gas pipe 203 is disconnected.

[0210] By controlling the opening / closing states of the high-pressure gas valve 208, the heat release valve 210, and the cold release valve 212, the direction of the refrigerant at the second port 201b of the accumulator 201 can be controlled. This includes the refrigerant entering the second port 201b from the liquid-side main pipe 3 via the cold storage check valve 207 and the second liquid pipe 205, or flowing out of the low-pressure gas pipe 5 from the second port 201b via the second gas pipe 203, or entering the second port 201b from the high-pressure gas pipe 4 via the first gas pipe 202 and the second liquid pipe 205.

[0211] refer to Figures 13 to 15 In some embodiments, the air conditioning system also includes a storage container 220.

[0212] In some embodiments, the storage container 220 has a first interface 220a. The first interface 220a of the storage container 220 is connected to the liquid-side main pipe 3, and the connection between the first interface 220a and the liquid-side main pipe 3 is located between the bypass valve 211 and the outdoor heat exchanger 104. Further, the connection between the first interface 220a and the liquid-side main pipe 3 is located between the connection between the first liquid pipe 204 and the liquid-side main pipe 3, and the outdoor heat exchanger 104.

[0213] By configuring the storage container 220, the amount of refrigerant in the system can be adjusted by releasing or storing refrigerant when switching between different modes, ensuring that the system can operate efficiently and stably.

[0214] In some embodiments, the air conditioning system further includes a liquid inlet valve 221, which is located on the pipeline connected to the first interface 220a and the liquid-side main pipe 3.

[0215] When the inlet valve 221 is opened, the pipeline between the first interface 220a and the liquid-side main pipe 3 is connected; when the inlet valve 221 is closed, the pipeline between the first interface 220a and the liquid-side main pipe 3 is disconnected.

[0216] In some embodiments, the storage container 220 further has a second interface 220b. The second interface 220b of the storage container 220 is connected to the first air tube 202.

[0217] In some embodiments, the air conditioning system further includes a pressurization valve 222, which is located on the pipeline connecting the second interface 220b and the first gas pipe 202.

[0218] When the pressurization valve 222 is opened, the pipeline between the second port 220b and the second air pipe 202 is connected; when the pressurization valve 222 is closed, the pipeline between the second port 220b and the second air pipe 202 is disconnected.

[0219] In some embodiments, the storage container 220 further has a second interface 220b. The second interface 220b of the storage container 220 is also connected to the low-pressure gas pipe 5.

[0220] In some embodiments, the air conditioning system further includes an air balance valve 224, which is located on the pipeline connected to the low-pressure gas pipe 5 via the second interface 220b.

[0221] When the gas balance valve 224 is opened, the pipeline between the second port 220b and the second air pipe 203 is connected; when the gas balance valve 224 is closed, the pipeline between the second port 220b and the second air pipe 203 is disconnected.

[0222] In some embodiments, the storage container 220 further has a third interface 220c. The third interface 220c of the storage container 220 is connected to the low-pressure gas pipe 5.

[0223] In some embodiments, the air conditioning system further includes a drain valve 223, which is located on the pipeline connected to the low-pressure gas pipe 5 via the third interface 220c.

[0224] When the drain valve 223 is opened, the pipeline between the third port 220c and the second air pipe 203 is connected; when the drain valve 223 is closed, the pipeline between the third port 220c and the second air pipe 203 is disconnected.

[0225] The connection point of the third interface 220c to the low-pressure gas pipe 5 is closer to the inlet of the compressor 101 than the connection point of the second interface 220b to the low-pressure gas pipe 5.

[0226] In some embodiments, the air conditioning system further includes two third throttling elements 225. The two third throttling elements 225 are respectively disposed on the pipeline where the third interface 220c is connected to the low-pressure gas pipe 5, and on the pipeline where the second interface 220b is connected to the low-pressure gas pipe 5.

[0227] Optionally, the third throttling element 225 includes a capillary.

[0228] refer to Figures 16 to 18 In other embodiments, the air conditioning system also includes a storage container 220.

[0229] The storage container 220 has a fourth interface 220a', which is connected to the liquid-side main pipe 3. The connection point between the fourth interface 220a' and the liquid-side main pipe 3 is located between the bypass valve 211 and the outdoor heat exchanger 104. Further, the connection point between the fourth interface 220a' and the liquid-side main pipe 3 is located between the connection point between the first liquid pipe 204 and the liquid-side main pipe 3, and the outdoor heat exchanger 104.

[0230] In some embodiments, the air conditioning system further includes an air balance valve 224, which is located on the pipeline connected to the liquid side main pipe 3 via the fourth interface 220a'.

[0231] When the gas balance valve 224 is opened, the pipeline between the fourth port 220a' and the liquid-side main pipe 3 is connected; when the gas balance valve 224 is closed, the pipeline between the fourth port 220a' and the liquid-side main pipe 3 is disconnected.

[0232] In some embodiments, the storage container 220 further has a fifth interface 220c'. The fifth interface 220c' of the storage container 220 is connected to the low-pressure gas pipe 5.

[0233] In some embodiments, the air conditioning system further includes a drain valve 223. The drain valve 223 is located on the pipeline where the fifth interface 220c' is connected to the low-pressure gas pipe 5.

[0234] In some embodiments, the air conditioning system further includes a third throttling element 225. The third throttling element 225 is disposed on the pipeline where the fifth interface 220c' is connected to the low-pressure gas pipe 5.

[0235] When the drain valve 223 is opened, the pipeline between the fifth port 220c' and the second air pipe 203 is connected; when the drain valve 223 is closed, the pipeline between the fifth port 220c' and the second air pipe 203 is disconnected.

[0236] Optionally, the third throttling element 225 includes a capillary.

[0237] In some embodiments, the air conditioning system further includes a fourth liquid pipe 604, one end of which is connected to the liquid-side main pipe 3, and the other end of which is connected to one end of the indoor heat exchanger 7.

[0238] In some embodiments, the air conditioning system further includes an indoor expansion valve 701, which is disposed on the fourth liquid line 604.

[0239] In some embodiments, the air conditioning system further includes a third gas pipe 605, one end of which is connected to the other end of the indoor heat exchanger 7, and the other end of the third gas pipe 605 is divided into a first path and a second path, the first path being connected to the high-pressure gas pipe 4 and the second path being connected to the low-pressure gas pipe 5.

[0240] In some embodiments, the air conditioning system further includes a refrigeration valve 602, which is arranged in the second path.

[0241] In some embodiments, the air conditioning system further includes a heating valve 603, which is arranged in the third path.

[0242] In some embodiments, the air conditioning system further includes a second subcooler 601, through which a fourth liquid pipe 604 passes. Refrigerant in the fourth liquid pipe 604 sequentially passes through the second subcooler 601 and the indoor expansion valve 701 before entering the indoor heat exchanger 7. Alternatively, refrigerant passing through the indoor heat exchanger 7 flows out of the fourth liquid pipe 604 sequentially through the indoor expansion valve 701 and the second subcooler 601.

[0243] In some embodiments, the air conditioning system further includes a first branch and a liquid pipe expansion valve 301. The first branch is connected to the liquid side main pipe 3 of the indoor unit section, and the liquid pipe expansion valve 301 is located on the first branch.

[0244] Optionally, the liquid line expansion valve 301 includes an electronic expansion valve.

[0245] The refrigerant flows from the outdoor unit section 1 to the indoor unit section along the liquid-side main pipe 3. The connection point of the first branch with the liquid-side main pipe 3 of the indoor unit section is located upstream of the connection point between each indoor heat exchanger 7 and the liquid-side main pipe 3.

[0246] In some embodiments, the air conditioning system further includes a second branch, which is connected to the low-pressure gas pipe 5 of the indoor unit.

[0247] The refrigerant flows from the indoor unit to the outdoor unit 1 along the low-pressure gas pipe 5. The connection point of the second branch to the low-pressure gas pipe 5 is located downstream of the connection point between each indoor heat exchanger 7 and the low-pressure gas pipe 5.

[0248] In some embodiments, the air conditioning system further includes a third branch, one end of which is connected to the first branch and the other end of which is connected to the second branch, and the third branch passes through the second subcooler 601.

[0249] In some embodiments, each indoor heat exchanger 7 is independently provided with a fourth liquid pipe 604, an indoor expansion valve 701, a third gas pipe 605, a cooling valve 602, and a heating valve 603.

[0250] In some embodiments, the air conditioning system further includes a gas-liquid separator 108, which is located at the inlet of the compressor 101, and the refrigerant enters the inlet of the compressor after passing through the gas-liquid separator 108.

[0251] Optionally, all refrigerant entering compressor 101 must first pass through gas-liquid separator 108, and then enter compressor 101 from the inlet of compressor 101.

[0252] The air conditioning system provided in this embodiment integrates multiple functions through a simple pipeline design, which broadens the application scenarios of energy storage and can more fully realize the value of energy storage. The energy storage device 201 can store energy during off-peak electricity price periods and release energy during peak electricity price periods, thereby reducing the power consumption of the air conditioning system at these times.

[0253] Optionally, the air conditioning system has pre-set instructions that direct the air conditioning system to switch operating modes, and the electricity price change curve is a known mode switching condition that has been set in the instructions.

[0254] Some embodiments also provide a control method for an air conditioning system, the control method including:

[0255] Determine the operating mode of the air conditioning system;

[0256] The state of the outdoor heat exchanger 104, indoor heat exchanger 7, accumulator 201, first regulating valve 102 and second regulating valve 103 in the air conditioning system is controlled according to the preset control strategy corresponding to the working mode.

[0257] In some embodiments, determining the operating mode of the air conditioning system includes:

[0258] 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 in which the corresponding energy storage unit 201 is in either a non-working state, a cooling release state, or a heat release state.

[0259] 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.

[0260] The air conditioning system provided in this disclosure has multiple operating modes, which can be applied to different time periods, thus alleviating the problem of mismatch between air conditioning power consumption and time-of-use electricity pricing policies, resulting in uneconomical operation.

[0261] The air conditioning system provided in this embodiment stores energy during off-peak electricity price periods and releases energy during peak electricity price periods, thereby reducing the power consumption of the air conditioning system at these times, achieving "peak shaving and valley filling" of electricity, and reducing the operating cost of the air conditioner.

[0262] The air conditioning system provided in this embodiment can achieve 37 working modes, such as complete cold storage, simultaneous cold storage and complete cooling, and simultaneous cold storage and main cooling, by switching pipelines and valves. This expands the application range of the energy storage system and improves its availability.

[0263] The following describes the thirty-seven operating modes of the air conditioning system.

[0264] In some embodiments, the operating modes of the air conditioning system include a first operating mode - a normal full cooling mode; in the normal full cooling mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the second valve position, and the accumulator 201 is in a non-operating state; the outdoor heat exchanger 104 is used as a condenser, and the indoor heat exchanger 7 is used as an evaporator.

[0265] The first working mode is the same as the cooling mode in the prior art, in which the accumulator 201 is in a non-working state, the outdoor heat exchanger 104 is used as a condenser, and the indoor heat exchanger 7 is used as an evaporator to achieve cooling.

[0266] In some embodiments, the air conditioning system operates in a second mode – a conventional main cooling mode. In the conventional main cooling mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, and the accumulator 201 is in a non-operating state. The outdoor heat exchanger 104 is used as a condenser, a portion of the indoor heat exchangers 7 is used as an evaporator, and another portion of the indoor heat exchangers 7 is used as a condenser. The evaporation load of the indoor heat exchangers 7, which is used as an evaporator, is greater than the condensation load of the indoor heat exchangers 7, which is used as a condenser.

[0267] In the second working mode, the accumulator 201 is in a non-working state and does not have an energy storage effect. The outdoor heat exchanger 104 is used as a condenser, some indoor heat exchangers 7 are used as evaporators, and another part of the indoor heat exchangers 7 are used as condensers. The evaporation load of the indoor heat exchangers 7 acting as evaporators is greater than the condensation load of the indoor heat exchangers 7 acting as condensers. This mode mainly achieves refrigeration. The fact that some indoor heat exchangers 7 are used as evaporators and another part of the indoor heat exchangers 7 are used as condensers allows for refrigerant circulation between the indoor heat exchangers 7, reducing compressor energy consumption and achieving energy-saving effects.

[0268] In some embodiments, the air conditioning system operates in a third operating mode – a full cold storage mode. In the full cold storage mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the second valve position, the indoor heat exchanger 7 is not working, the outdoor heat exchanger 104 is used as a condenser, and the accumulator 201 is used as an evaporator.

[0269] In the third operating mode, the indoor heat exchanger 7 is not working, the outdoor heat exchanger 104 is used as a condenser, and the energy storage unit 201 is used as an evaporator. This mode is suitable for off-peak electricity price periods. Cold storage is achieved through the energy storage unit 201. During peak electricity price periods, the cold energy can be released through the energy storage unit 201, thereby reducing the power consumption of the air conditioning system during peak electricity price periods, achieving "peak shaving and valley filling" of electricity, and reducing the operating cost of air conditioning.

[0270] In some embodiments, the air conditioning system operates in a fourth mode – a cold storage and simultaneous full cooling mode. In the cold storage and simultaneous full cooling mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the second valve position, the outdoor heat exchanger 104 is used as a condenser, the energy storage unit 201 is used as an evaporator, and the indoor heat exchanger 7 is also used as an evaporator.

[0271] The fourth working mode is also applicable to off-peak electricity price periods. Both the energy storage unit 201 and the indoor heat exchanger 7 are used as evaporators. While cooling, the energy storage unit 201 stores cold energy. During peak electricity price periods, the energy storage unit 201 can release the cold energy, thereby reducing the power consumption of the air conditioning system during peak electricity price periods, realizing "peak shaving and valley filling" of electricity, and reducing the operating cost of air conditioning.

[0272] In some embodiments, the air conditioning system operates in a fifth mode – a cold storage and full heating mode (outdoor unit condensation). In the cold storage and full heating mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the accumulator 201 is used as an evaporator, and the indoor heat exchanger 7 is used as a condenser.

[0273] In the fifth operating mode, the indoor heat exchanger 7 is used as a condenser to achieve full heating, and the accumulator 201 is used as an evaporator to achieve cold storage while heating. Refrigerant circulation can be achieved between the indoor heat exchanger 7 and the accumulator 201. The outdoor heat exchanger 104 is also used as a condenser to ensure that the system has sufficient condensation capacity.

[0274] In some embodiments, the air conditioning system operates in a sixth mode – a cold storage and full heating mode (outdoor unit evaporation). In the cold storage and full heating mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the accumulator 201 is used as an evaporator, and the indoor heat exchanger 7 is used as a condenser.

[0275] In the sixth working mode, the indoor heat exchanger 7 is used as a condenser to achieve full heating, and the energy storage unit 201 is used as an evaporator to achieve cold storage while heating. Refrigerant circulation can be achieved between the indoor heat exchanger 7 and the energy storage unit 201. The outdoor heat exchanger 104 is also used as an evaporator to ensure that the indoor space has sufficient heating capacity.

[0276] In some embodiments, the air conditioning system operates in a seventh mode – a cold storage and main cooling mode. In the cold storage and main cooling mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the energy storage unit 201 is used as an evaporator, a portion of the indoor heat exchangers 7 are used as evaporators, and another portion of the indoor heat exchangers 7 are used as condensers. The evaporation load of the indoor heat exchangers 7, which are used as evaporators, is greater than the condensation load of the indoor heat exchangers 7, which are used as condensers.

[0277] In the seventh operating mode, the accumulator 201 acts as an evaporator, storing cold energy to release during peak electricity price periods. This reduces the power consumption of the air conditioning system during these periods, achieving peak shaving and valley filling, and lowering operating costs. Furthermore, some indoor heat exchangers 7 function as evaporators, while others act as condensers, enabling refrigerant circulation between them, reducing compressor energy consumption and achieving energy savings. The evaporation load of the indoor heat exchangers 7 as evaporators exceeds the condensation load of the indoor heat exchangers 7 as condensers, thus achieving primary cooling.

[0278] In some embodiments, the air conditioning system operates in an eighth mode – a cold storage and simultaneous main heating mode (outdoor unit evaporation). In the cold storage and simultaneous main heating mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the energy storage unit 201 is used as an evaporator, a portion of the indoor heat exchangers 7 is used as an evaporator, and another portion of the indoor heat exchangers 7 is used as a condenser. The evaporation load of the indoor heat exchangers 7 acting as evaporators is less than the condensation load of the indoor heat exchangers 7 acting as condensers.

[0279] In the eighth operating mode, the energy accumulator 201 acts as an evaporator, storing cold energy to release during peak electricity price periods. This reduces the power consumption of the air conditioning system during these periods, achieving peak shaving and valley filling, and lowering the operating costs of the air conditioning system. Furthermore, some indoor heat exchangers 7 function as evaporators, while others act as condensers, enabling refrigerant circulation between the indoor heat exchangers 7, reducing compressor energy consumption and achieving energy savings. The evaporation load of the indoor heat exchangers 7 acting as evaporators is less than the condensation load of the indoor heat exchangers 7 acting as condensers, thus achieving primary heating.

[0280] In some embodiments, the air conditioning system operates in a ninth mode – a cold storage and main heating mode (outdoor unit condensation). In the cold storage and main heating mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the energy storage unit 201 is used as an evaporator, a portion of the indoor heat exchangers 7 are used as evaporators, and another portion of the indoor heat exchangers 7 are used as condensers. The evaporation load of the indoor heat exchangers 7 as evaporators is less than the condensation load of the indoor heat exchangers 7 as condensers.

[0281] In the ninth operating mode, the accumulator 201 acts as an evaporator, storing cold energy to release during peak electricity price periods. This reduces the power consumption of the air conditioning system during these periods, achieving peak shaving and valley filling, and lowering operating costs. Part of the indoor heat exchangers 7 are used as evaporators, while another part acts as condensers, enabling refrigerant circulation between them, reducing compressor energy consumption and achieving energy savings. The evaporation load of the indoor heat exchangers 7 as evaporators is less than the condensation load of the indoor heat exchangers 7 as condensers, thus achieving primary heating.

[0282] In some embodiments, the air conditioning system operates in a tenth mode – a subcooling and releasing cooling mode that provides simultaneous full cooling. In the subcooling and releasing cooling mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the second valve position, the outdoor heat exchanger 104 is used as a condenser, the accumulator 201 is used as a subcooler, and the indoor heat exchanger 7 is used as an evaporator.

[0283] In the tenth operating mode, the energy storage unit 201 can subcool the refrigerant using the cold energy stored within it, further reducing the temperature of the refrigerant and its cooling capacity, without increasing the energy consumption of the compressor. This mode is suitable for peak electricity price periods, reducing the power consumption of the air conditioning system during peak electricity price periods, achieving "peak shaving and valley filling" of electricity, and reducing the operating cost of the air conditioning system.

[0284] In some embodiments, the air conditioning system operates in an eleventh mode – a subcooling and cooling release mode with simultaneous main cooling. In the subcooling and cooling release mode with simultaneous main cooling, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the accumulator 201 is used as a subcooler, part of the indoor heat exchangers 7 is used as an evaporator, and another part of the indoor heat exchangers 7 is used as a condenser. The evaporation load of the indoor heat exchangers 7 as evaporators is greater than the condensation load of the indoor heat exchangers 7 as condensers.

[0285] In the eleventh operating mode, the accumulator 201 can subcool the refrigerant using the stored cold energy, further reducing the refrigerant temperature and cooling capacity without increasing compressor energy consumption. This mode is suitable for peak electricity price periods, reducing the power consumption of the air conditioning system during these times, achieving peak shaving and valley filling, and lowering air conditioning operating costs. Part of the indoor heat exchangers 7 are used as evaporators, and another part as condensers, enabling refrigerant circulation between the indoor heat exchangers 7, reducing compressor energy consumption, and achieving energy-saving effects. The evaporation load of the indoor heat exchangers 7 acting as evaporators is greater than the condensation load of the indoor heat exchangers 7 acting as condensers, achieving main cooling.

[0286] In some embodiments, the air conditioning system operates in a twelfth mode – condensation and cooling simultaneously in a complete cooling mode. In the condensation and cooling simultaneously in a complete cooling mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is not working, the accumulator 201 is used as a condenser, and the indoor heat exchanger 7 is used as an evaporator.

[0287] In the twelfth operating mode, the outdoor heat exchanger 104 is not working, the accumulator 201 is used as a condenser, and the indoor heat exchanger 7 is used as an evaporator. Refrigerant circulation is achieved between the accumulator 201 and the indoor heat exchanger 7, and the accumulator 201 releases cold. At this time, because the temperature of the accumulator 201 is low, the system can operate under low pressure ratio conditions, which significantly reduces the compressor frequency and power consumption. It is suitable for peak electricity price periods and can greatly reduce the power consumption of the air conditioning system during peak electricity price periods, achieve "peak shaving and valley filling" of electricity, and reduce the operating cost of air conditioning.

[0288] In some embodiments, the air conditioning system operates in a thirteenth mode – condensation and cooling simultaneously with main cooling mode. In the condensation and cooling simultaneously with main cooling mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is not working, the accumulator 201 is used as a condenser, part of the indoor heat exchangers 7 is used as an evaporator, and another part of the indoor heat exchangers 7 is used as a condenser. The evaporation load of the indoor heat exchangers 7 as evaporators is greater than the condensation load of the indoor heat exchangers 7 as condensers.

[0289] In the thirteenth operating mode, the outdoor heat exchanger 104 is not operating. The accumulator 201 is used as a condenser, and some of the indoor heat exchangers 7 are used as evaporators. Refrigerant circulation occurs between the accumulator 201 and some of the indoor heat exchangers 7, and the accumulator 201 releases coolant. Because the temperature of the accumulator 201 is low, the system can operate under low pressure ratio conditions, significantly reducing compressor frequency and power consumption. This is suitable for peak electricity price periods, greatly reducing the power consumption of the air conditioning system during these periods, achieving peak shaving and valley filling, and lowering the operating costs of the air conditioning system. With some indoor heat exchangers 7 acting as evaporators and others as condensers, refrigerant circulation between the indoor heat exchangers 7 can be achieved, reducing compressor energy consumption and resulting in energy savings. The evaporation load of the indoor heat exchangers 7 acting as evaporators is greater than the condensation load of the indoor heat exchangers 7 acting as condensers, achieving primary cooling.

[0290] In some embodiments, the air conditioning system operates in a fourteenth mode – parallel cooling and simultaneous full cooling mode; in the parallel cooling and simultaneous full cooling mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the accumulator 201 is used as a condenser, and the indoor heat exchanger 7 is used as an evaporator.

[0291] In the fourteenth working mode, both the energy storage unit 201 and the outdoor heat exchanger 104 act as condensers and release cold in parallel. The cold energy in the energy storage unit 201 is stored during off-peak electricity price periods. During peak electricity price periods, the cold energy can be released through the energy storage unit 201, thereby reducing the power consumption of the air conditioning system during peak electricity price periods, realizing "peak shaving and valley filling" of electricity, and reducing the operating cost of air conditioning.

[0292] In some embodiments, the air conditioning system operates in a fifteenth operating mode – parallel cooling and main cooling mode. In the parallel cooling and main cooling mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the accumulator 201 is used as a condenser, part of the indoor heat exchanger 7 is used as an evaporator, and another part of the indoor heat exchanger 7 is used as a condenser. The evaporation load of the indoor heat exchanger 7 as an evaporator is greater than the condensation load of the indoor heat exchanger 7 as a condenser.

[0293] In the fifteenth operating mode, both the energy accumulator 201 and the outdoor heat exchanger 104 act as condensers, releasing cold in parallel. The cooling capacity in the energy accumulator 201 is stored during off-peak electricity price periods. During peak electricity price periods, the cooling capacity can be released through the energy accumulator 201, thereby reducing the power consumption of the air conditioning system during peak electricity price periods, achieving "peak shaving and valley filling" of electricity, and reducing the operating cost of the air conditioning. Some indoor heat exchangers 7 are used as evaporators, and others are used as condensers, enabling refrigerant circulation between the indoor heat exchangers 7, reducing compressor energy consumption, and achieving energy-saving effects. The evaporation load of the indoor heat exchangers 7 as evaporators is greater than the condensation load of the indoor heat exchangers 7 as condensers, achieving the main cooling effect.

[0294] In some embodiments, the operating mode of the air conditioning system includes a sixteenth operating mode - normal full heating mode; in normal full heating mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the accumulator 201 is not working, and the indoor heat exchanger 7 is used as a condenser.

[0295] The sixteenth operating mode is the same as the heating mode in the prior art. The accumulator 201 is in a non-operating state, the outdoor heat exchanger 104 is used as an evaporator, and the indoor heat exchanger 7 is used as a condenser to achieve heating.

[0296] In some embodiments, the air conditioning system operates in a seventeenth mode – the conventional main heating mode. In the conventional main heating mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the accumulator 201 is not working, some indoor heat exchangers 7 are used as evaporators, and another part of the indoor heat exchangers 7 are used as condensers. The evaporation load of the indoor heat exchangers 7 as evaporators is less than the condensation load of the indoor heat exchangers 7 as condensers.

[0297] In the seventeenth operating mode, the accumulator 201 is in a non-operating state and does not have an energy storage effect. The outdoor heat exchanger 104 is used as an evaporator, part of the indoor heat exchangers 7 is used as an evaporator, and another part of the indoor heat exchangers 7 is used as a condenser. This enables refrigerant circulation between the indoor heat exchangers 7, reducing compressor energy consumption and achieving energy-saving effects. Furthermore, the evaporation load of the indoor heat exchangers 7 acting as evaporators is less than the condensation load of the indoor heat exchangers 7 acting as condensers, primarily achieving heating.

[0298] In some embodiments, the air conditioning system operates in an eighteenth mode – full heat storage mode. In full heat storage mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the accumulator 201 is used as a condenser, and the indoor heat exchanger 7 is not in operation.

[0299] In the eighteenth working mode, the indoor heat exchanger 7 is not working, the outdoor heat exchanger 104 is used as an evaporator, and the energy storage unit 201 is used as a condenser. This mode is suitable for off-peak electricity price periods. Heat is stored through the energy storage unit 201. During peak electricity price periods, heat can be released through the energy storage unit 201, thereby reducing the power consumption of the air conditioning system during peak electricity price periods, realizing "peak shaving and valley filling" of electricity, and reducing the operating cost of air conditioning.

[0300] In some embodiments, the air conditioning system operates in a nineteenth mode – a heat storage and full heating mode. In the heat storage and full heating mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the accumulator 201 is used as a condenser, and the indoor heat exchanger 7 is used as a condenser.

[0301] The nineteenth working mode is also applicable to off-peak electricity price periods. Both the energy storage unit 201 and the indoor heat exchanger 7 are used as condensers. While heating, heat is stored through the energy storage unit 201. During peak electricity price periods, heat can be released through the energy storage unit 201, thereby reducing the power consumption of the air conditioning system during peak electricity price periods, realizing "peak shaving and valley filling" of electricity, and reducing the operating cost of air conditioning.

[0302] In some embodiments, the operating mode of the air conditioning system includes a twentieth operating mode - heat storage and simultaneous full cooling mode (outdoor unit evaporation); in the heat storage and simultaneous full cooling mode, the first regulating valve 102 is located in the first valve position, the second regulating valve 103 is located in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the energy storage unit 201 is used as a condenser, and the indoor heat exchanger 7 is used as an evaporator.

[0303] In the twentieth operating mode, the indoor heat exchanger 7 is used as an evaporator to achieve complete cooling, and the accumulator 201 is used as a condenser to achieve heat storage. Refrigerant circulation can be achieved between the indoor heat exchanger 7 and the accumulator 201, reducing compressor energy consumption while storing energy.

[0304] In some embodiments, the operating mode of the air conditioning system includes a twenty-first operating mode - heat storage and simultaneous full cooling mode (outdoor unit condensation); in the heat storage and simultaneous full cooling mode, the first regulating valve 102 is located in the second valve position, the second regulating valve 103 is located in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the energy storage unit 201 is used as a condenser, and the indoor heat exchanger 7 is used as an evaporator.

[0305] In the twenty-first working mode, the energy storage unit 201 acts as a condenser. While cooling, it can store heat through the energy storage unit 201. During peak electricity price periods, the heat can be released through the energy storage unit 201, thereby reducing the power consumption of the air conditioning system during peak electricity price periods, realizing "peak shaving and valley filling" of electricity, and reducing the operating cost of air conditioning.

[0306] In some embodiments, the air conditioning system operates in a twenty-second mode – a heat storage and main heating mode. In the heat storage and main heating mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the accumulator 201 is used as a condenser, a portion of the indoor heat exchangers 7 are used as evaporators, and another portion of the indoor heat exchangers 7 are used as condensers. The evaporation load of the indoor heat exchangers 7 as evaporators is less than the condensation load of the indoor heat exchangers 7 as condensers.

[0307] In the twenty-second operating mode, the energy accumulator 201 acts as a condenser, storing heat to release during peak electricity price periods. This reduces the power consumption of the air conditioning system during these periods, achieving peak shaving and valley filling, and lowering operating costs. Part of the indoor heat exchangers 7 are used as evaporators, while another part acts as a condenser, enabling refrigerant circulation between the indoor heat exchangers 7 and reducing compressor energy consumption. This results in energy savings. The evaporation load of the indoor heat exchangers 7 acting as evaporators is less than the condensation load of the indoor heat exchangers 7 acting as condensers, achieving primary heating.

[0308] In some embodiments, the air conditioning system operates in a twenty-third operating mode – a heat storage and main cooling mode (outdoor unit condensation). In the heat storage and main cooling mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the accumulator 201 is used as a condenser, a portion of the indoor heat exchangers 7 is used as an evaporator, and another portion of the indoor heat exchangers 7 is used as a condenser. The evaporation load of the indoor heat exchangers 7 as evaporators is greater than the condensation load of the indoor heat exchangers 7 as condensers.

[0309] In the twenty-third operating mode, the energy accumulator 201 acts as a condenser, storing heat to release during peak electricity price periods. This reduces the power consumption of the air conditioning system during these periods, achieving peak shaving and valley filling, and lowering operating costs. Furthermore, some indoor heat exchangers 7 function as evaporators, while others act as condensers, enabling refrigerant circulation between them, reducing compressor energy consumption and achieving energy savings. The evaporation load of the indoor heat exchangers 7 acting as evaporators exceeds the condensation load of the indoor heat exchangers 7 acting as condensers, thus achieving primary cooling.

[0310] In some embodiments, the air conditioning system operates in a twenty-fourth mode – heat storage and main cooling mode (outdoor unit evaporation). In the heat storage and main cooling mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the accumulator 201 is used as a condenser, a portion of the indoor heat exchangers 7 are used as evaporators, and another portion of the indoor heat exchangers 7 are used as condensers. The evaporation load of the indoor heat exchangers 7 as evaporators is greater than the condensation load of the indoor heat exchangers 7 as condensers.

[0311] In the 24th operating mode, the accumulator 201 acts as a condenser, storing heat to release during peak electricity price periods. This reduces the power consumption of the air conditioning system during these periods, achieving peak shaving and valley filling, and lowering operating costs. Part of the indoor heat exchangers 7 are used as evaporators, while another part acts as a condenser, enabling refrigerant circulation between them, reducing compressor energy consumption and achieving energy savings. The evaporation load of the indoor heat exchangers 7 acting as evaporators is greater than the condensation load of the indoor heat exchangers 7 acting as condensers, thus achieving primary cooling.

[0312] In some embodiments, the air conditioning system operates in a twenty-fifth mode – a mixed heat release and simultaneous full heating mode. In the mixed heat release and simultaneous full heating mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the accumulator 201 is used as an evaporator, and the indoor heat exchanger 7 is used as a condenser.

[0313] In the 25th operating mode, both the outdoor heat exchanger 104 and the accumulator 201 are used as evaporators. The accumulator 201 can release heat to the refrigerant through the heat stored in it, thereby reducing the evaporation load of the system and reducing the energy consumption of the compressor. This mode is suitable for peak electricity price periods and can reduce the power consumption of the air conditioning system during peak electricity price periods, achieving "peak shaving and valley filling" of electricity and reducing the operating cost of air conditioning.

[0314] In some embodiments, the air conditioning system operates in a twenty-sixth mode – a mixed heat release and simultaneous main heating mode. In the mixed heat release and simultaneous main heating mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as an evaporator, the accumulator 201 is used as an evaporator, a portion of the indoor heat exchangers 7 are used as evaporators, and another portion of the indoor heat exchangers 7 are used as condensers. The evaporation load of the indoor heat exchangers 7 as evaporators is less than the condensation load of the indoor heat exchangers 7 as condensers.

[0315] In the 26th operating mode, both the outdoor heat exchanger 104 and the accumulator 201 function as evaporators. The accumulator 201 can release heat to the refrigerant using the heat stored within it, reducing the system's evaporation load and thus lowering compressor energy consumption. This mode is suitable for peak electricity price periods, reducing the power consumption of the air conditioning system during these times, achieving peak shaving and valley filling, and lowering the operating costs of the air conditioning system. Part of the indoor heat exchanger 7 functions as an evaporator, while another part functions as a condenser. This allows for refrigerant circulation between the indoor heat exchangers 7, reducing compressor energy consumption and achieving energy-saving effects. The evaporation load of the indoor heat exchanger 7 acting as an evaporator is less than the condensation load of the indoor heat exchanger 7 acting as a condenser, thus achieving primary heating.

[0316] In some embodiments, the air conditioning system operates in a twenty-seventh mode – independent heat release and simultaneous full heating mode. In the independent heat release and simultaneous full heating mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is not working, the accumulator 201 is used as an evaporator, and the indoor heat exchanger 7 is used as a condenser.

[0317] In the twenty-seventh operating mode, the outdoor heat exchanger 104 is not working, the accumulator 201 is used as an evaporator, and the indoor heat exchanger 7 is used as a condenser. Refrigerant circulation is achieved between the accumulator 201 and the indoor heat exchanger 7. The accumulator 201 releases heat, and it utilizes the heat stored during the low electricity price period, which will not increase the energy consumption of the compressor. It is suitable for peak electricity price periods. At the same time, due to the high temperature inside the accumulator, the system can operate under low pressure ratio conditions, thus reducing the compressor speed during peak electricity price periods, thereby reducing the power consumption of the air conditioning system, realizing "peak shaving and valley filling" of electricity, and reducing the operating cost of air conditioning.

[0318] In some embodiments, the air conditioning system operates in a twenty-eighth mode – independent heat release and simultaneous main heating mode. In the independent heat release and simultaneous main heating mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is not working, the accumulator 201 is used as an evaporator, part of the indoor heat exchangers 7 is used as an evaporator, and another part of the indoor heat exchangers 7 is used as a condenser. The evaporation load of the indoor heat exchangers 7 as evaporators is less than the condensation load of the indoor heat exchangers 7 as condensers.

[0319] In the twenty-eighth mode, the outdoor heat exchanger 104 is not operating. The accumulator 201 is used as an evaporator, and part of the indoor heat exchangers 7 are used as condensers. Refrigerant circulation occurs between the accumulator 201 and part of the indoor heat exchangers 7. The accumulator 201 releases heat, utilizing the heat stored during low electricity price periods, thus not increasing compressor energy consumption. This mode is suitable for peak electricity price periods. Simultaneously, due to the higher temperature inside the accumulator, the system can operate under low pressure ratio conditions, thereby reducing compressor speed during peak electricity price periods, reducing air conditioning system power consumption, achieving peak shaving and valley filling, and lowering air conditioning operating costs. With part of the indoor heat exchangers 7 acting as evaporators and another part as condensers, refrigerant circulation between the indoor heat exchangers 7 can be achieved, reducing compressor energy consumption and resulting in energy savings. The evaporation load of the indoor heat exchangers 7 acting as evaporators is less than the condensation load of the indoor heat exchangers 7 acting as condensers, achieving primary heating.

[0320] In some embodiments, the air conditioning system operates in a twenty-ninth operating mode – discontinuous heating and defrosting mode; in the discontinuous heating and defrosting mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the second valve position, the outdoor heat exchanger 104 is used as a condenser, the accumulator 201 is used as an evaporator, and the indoor heat exchanger 7 is not in operation.

[0321] In the 29th working mode, the indoor heat exchanger 7 is not working, the outdoor heat exchanger 104 is used as a condenser, and the accumulator 201 is used as an evaporator. The accumulator 201 can use the heat stored during off-peak electricity periods to increase the temperature of the refrigerant so that the outdoor heat exchanger 104 can defrost, reduce the energy consumption of the compressor, and achieve energy saving.

[0322] In some embodiments, the air conditioning system operates in a thirtieth mode – a continuous heating and defrosting mode with full heating. In the continuous heating and defrosting mode with full heating, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the accumulator 201 is used as an evaporator, and the indoor heat exchanger 7 is used as a condenser.

[0323] In the thirtieth operating mode, the indoor heat exchanger 7 is used as a condenser to achieve full heating, the accumulator 201 is used as an evaporator, and refrigerant circulation can be achieved between the indoor heat exchanger 7 and the accumulator 201. The outdoor heat exchanger 104 is used as a condenser, and the refrigerant releases heat to it, which can achieve defrosting of the outdoor heat exchanger 104. Therefore, continuous heating and defrosting can be achieved, and full heating can be achieved.

[0324] In some embodiments, the air conditioning system operates in a thirty-first mode – continuous heating and defrosting with main heating mode. In the continuous heating and defrosting with main heating mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the accumulator 201 is used as an evaporator, a portion of the indoor heat exchangers 7 are used as evaporators, and another portion of the indoor heat exchangers 7 are used as condensers. The evaporation load of the indoor heat exchangers 7 as evaporators is less than the condensation load of the indoor heat exchangers 7 as condensers.

[0325] In the thirty-first operating mode, some indoor heat exchangers 7 are used as condensers to achieve partial continuous heating, while the accumulator 201 is used as an evaporator. Refrigerant circulation is possible between some indoor heat exchangers 7 and the accumulator 201. The outdoor heat exchanger 104 is used as a condenser, and the refrigerant releases heat to it, enabling defrosting. With some indoor heat exchangers 7 acting as evaporators and others as condensers, refrigerant circulation between the indoor heat exchangers 7 is possible, reducing compressor energy consumption and achieving energy-saving effects. The evaporation load of the indoor heat exchangers 7 acting as evaporators is less than the condensation load of the indoor heat exchangers 7 acting as condensers, allowing for primary heating.

[0326] In some embodiments, the air conditioning system operates in a thirty-second mode – continuous heating and defrosting with main cooling mode. In the continuous heating and defrosting with main cooling mode, the first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is used as a condenser, the accumulator 201 is used as an evaporator, a portion of the indoor heat exchangers 7 are used as evaporators, and another portion of the indoor heat exchangers 7 are used as condensers. The evaporation load of the indoor heat exchangers 7 as evaporators is greater than the condensation load of the indoor heat exchangers 7 as condensers.

[0327] In the 32nd operating mode, some indoor heat exchangers 7 are used as condensers to achieve partial continuous heating, while the accumulator 201 is used as an evaporator. Refrigerant circulation is possible between some indoor heat exchangers 7 and the accumulator 201. The outdoor heat exchanger 104 is used as a condenser, and the refrigerant releases heat to it, enabling defrosting. In the 32nd operating mode, some indoor heat exchangers 7 are used as evaporators, and others as condensers, allowing refrigerant circulation between them, reducing compressor energy consumption and achieving energy-saving effects. The evaporation load of the indoor heat exchangers 7 as evaporators is greater than the condensation load of the indoor heat exchangers 7 as condensers, thus achieving mains cooling.

[0328] In some embodiments, the air conditioning system operates in a thirty-third operating mode – conventional heat recovery mode. In conventional heat recovery mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is not working, the accumulator 201 is not working, part of the indoor heat exchanger 7 is used as an evaporator, and another part of the indoor heat exchanger 7 is used as a condenser. The evaporation load of the indoor heat exchanger 7 as an evaporator is equal to the condensation load of the indoor heat exchanger 7 as a condenser.

[0329] In the 33rd working mode, the outdoor heat exchanger 104 is not working, the accumulator 201 is not working, some of the indoor heat exchangers 7 are used as evaporators, and the other part of the indoor heat exchangers 7 are used as condensers. This can realize refrigerant circulation between the indoor heat exchangers 7, reduce compressor energy consumption, and achieve heat recovery.

[0330] In some embodiments, the air conditioning system operates in a thirty-fourth mode – a cold storage and heat recovery mode. In the cold storage and heat recovery mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is not working, the accumulator 201 is used as an evaporator, part of the indoor heat exchanger 7 is used as an evaporator, and another part of the indoor heat exchanger 7 is used as a condenser. The evaporation load of the indoor heat exchanger 7 as an evaporator is less than the condensation load of the indoor heat exchanger 7 as a condenser.

[0331] In the 34th operating mode, the outdoor heat exchanger 104 is not operating. The accumulator 201 acts as an evaporator, and another part of the indoor heat exchangers 7 acts as a condenser. Refrigerant circulation is achieved between the accumulator 201 and the other part of the indoor heat exchangers 7, realizing heat recovery. Furthermore, cold storage is achieved through the accumulator 201, allowing for the release of cooling capacity during peak electricity price periods, thereby reducing the power consumption of the air conditioning system during these periods, achieving peak shaving and valley filling, and lowering the operating costs of the air conditioning system. The refrigerant circulation between the indoor heat exchangers 7 (one part as an evaporator, the other as a condenser) reduces compressor energy consumption, resulting in energy savings. The evaporation load of the indoor heat exchangers 7 (acting as an evaporator) is less than the condensation load of the indoor heat exchangers 7 (acting as a condenser), achieving primary heating.

[0332] In some embodiments, the air conditioning system operates in a thirty-fifth mode – heat storage and simultaneous heat recovery mode. In the heat storage and simultaneous heat recovery mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is not working, the accumulator 201 is used as a condenser, part of the indoor heat exchangers 7 is used as an evaporator, and another part of the indoor heat exchangers 7 is used as a condenser. The evaporation load of the indoor heat exchangers 7 as evaporators is greater than the condensation load of the indoor heat exchangers 7 as condensers.

[0333] In the 35th operating mode, the outdoor heat exchanger 104 is not operating. The accumulator 201 acts as a condenser, and another part of the indoor heat exchangers 7 acts as an evaporator. Refrigerant circulation is achieved between the accumulator 201 and the other part of the indoor heat exchangers 7, realizing heat recovery. Furthermore, heat is stored in the accumulator 201, which releases heat during peak electricity price periods, thereby reducing the power consumption of the air conditioning system during these periods, achieving peak shaving and valley filling, and reducing the operating costs of the air conditioning system. With some indoor heat exchangers 7 acting as evaporators and others as condensers, refrigerant circulation between the indoor heat exchangers 7 can be achieved, reducing compressor energy consumption and resulting in energy savings. The evaporation load of the indoor heat exchangers 7 acting as evaporators is greater than the condensation load of the indoor heat exchangers 7 acting as condensers, achieving primary cooling.

[0334] In some embodiments, the air conditioning system operates in a thirty-sixth mode – simultaneous cooling and heat recovery mode. In the simultaneous cooling and heat recovery mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is not working, the accumulator 201 is used as a condenser, part of the indoor heat exchangers 7 is used as an evaporator, and another part of the indoor heat exchangers 7 is used as a condenser. The evaporation load of the indoor heat exchangers 7 as evaporators is greater than the condensation load of the indoor heat exchangers 7 as condensers.

[0335] In the 36th operating mode, the outdoor heat exchanger 104 is not operating. The accumulator 201 acts as a condenser, and another part of the indoor heat exchangers 7 acts as an evaporator. Refrigerant circulation is achieved between the accumulator 201 and the other part of the indoor heat exchangers 7, realizing heat recovery. Furthermore, the accumulator 201, acting as a condenser, can release the cooling capacity stored during off-peak electricity price periods, making it suitable for peak electricity price periods. This reduces the power consumption of the air conditioning system during peak electricity price periods, achieving peak shaving and valley filling, and lowering the operating costs of the air conditioning system. Additionally, with some indoor heat exchangers 7 acting as evaporators and others as condensers, refrigerant circulation between the indoor heat exchangers 7 can be achieved, reducing compressor energy consumption and resulting in energy savings. The evaporation load of the indoor heat exchangers 7 acting as evaporators is greater than the condensation load of the indoor heat exchangers 7 acting as condensers, achieving main cooling.

[0336] In some embodiments, the air conditioning system operates in a thirty-seventh mode – simultaneous heat release and heat recovery mode. In the simultaneous heat release and heat recovery mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the first valve position, the outdoor heat exchanger 104 is not working, the accumulator 201 is used as an evaporator, part of the indoor heat exchanger 7 is used as an evaporator, and another part of the indoor heat exchanger 7 is used as a condenser. The evaporation load of the indoor heat exchanger 7 as an evaporator is less than the condensation load of the indoor heat exchanger 7 as a condenser.

[0337] In the 37th operating mode, the outdoor heat exchanger 104 is not operating. The accumulator 201 acts as an evaporator, and another part of the indoor heat exchangers 7 acts as a condenser. Refrigerant circulation is achieved between the accumulator 201 and the other part of the indoor heat exchangers 7, realizing heat recovery. Furthermore, the accumulator 201, acting as an evaporator, can release the heat stored during off-peak electricity price periods, making it suitable for peak electricity price periods. This reduces the power consumption of the air conditioning system during peak electricity price periods, achieving "peak shaving and valley filling" of electricity and reducing the operating costs of the air conditioning system. Additionally, with some indoor heat exchangers 7 acting as evaporators and others as condensers, refrigerant circulation between the indoor heat exchangers 7 can be achieved, reducing compressor energy consumption and resulting in energy savings. The evaporation load of the indoor heat exchangers 7 acting as evaporators is less than the condensation load of the indoor heat exchangers 7 acting as condensers, achieving primary heating.

[0338] The following is in conjunction with the appendix Figures 1 to 11 The piping and valve connections of the first embodiment of the air conditioning system are described in detail.

[0339] refer to Figure 1 The entire air conditioning system includes an outdoor unit 1, an energy storage unit 2, a mode switching unit 6, and an indoor unit. The energy storage unit 2 is located between the outdoor unit 1 and the indoor unit.

[0340] The outdoor unit 1 has five states: complete condensation, main unit condensation, complete evaporation, main unit evaporation, and outdoor heat exchanger off. Outdoor heat exchanger off means that the outdoor heat exchanger is turned off and not working.

[0341] The outdoor unit 1 includes a compressor 101, a first regulating valve 102, a second regulating valve 103, an outdoor heat exchanger 104, an outdoor expansion valve 105, a subcooling expansion valve 106, a first subcooler 107, and a gas-liquid separator 108.

[0342] Specifically, the first valve port D of the first regulating valve 102 is connected to the outlet of the compressor 101, the second valve port C of the first regulating valve 102 is connected to the outdoor heat exchanger 104, the third valve port S of the first regulating valve 102 is connected to the gas-liquid separator 108, and the fourth valve port E of the first regulating valve 102 is connected to the third valve port S of the first regulating valve 102 through the first throttling element.

[0343] The first valve port D of the second regulating valve 103 is connected to the outlet of the compressor 101; the second valve port C of the second regulating valve 103 is connected to the third valve port S of the second regulating valve 103 through the second throttling element; the third valve port S of the second regulating valve 103 is connected to the gas-liquid separator 108; and the fourth valve port E of the second regulating valve 103 is connected to the high-pressure gas pipe 4.

[0344] One end of the outdoor heat exchanger 104 is connected to the second valve port C of the first regulating valve 102, and the other end of the outdoor heat exchanger 104 is connected in sequence to the outdoor expansion valve 105 and the first subcooler 107.

[0345] An outdoor expansion valve 105 is installed on the pipeline connecting the outdoor heat exchanger 104 and the first subcooler 107. One end of the outdoor expansion valve 105 is connected to the outdoor heat exchanger 104, and the other end is connected to the first flow path of the first subcooler 107.

[0346] The first subcooler 107 includes a first flow path and a second flow path; the first flow path connects the liquid-side main pipe 3 to the outdoor expansion valve 105, and the second flow path is connected to the third port S and the fourth port E of the first regulating valve 102, the second port C and the third port S of the second regulating valve 103, the low-pressure gas pipe 5, and the gas-liquid separator 108.

[0347] The subcooled expansion valve 106 connects the first flow path and the second flow path.

[0348] The inlet of the gas-liquid separator 108 is connected to the third port S and the fourth port E of the first regulating valve 102, the second port C and the third port S of the second regulating valve 103, the second flow path, and the low-pressure gas pipe 5. The outlet of the gas-liquid separator 108 is connected to the inlet of the compressor 101.

[0349] The control methods for the first regulating valve 102, the second regulating valve 103, and the outdoor expansion valve 5 under different states of the outdoor unit 1 are shown in Table 1:

[0350] Table 1 - Outdoor Unit Section 1

[0351] state First regulating valve 102 First regulating valve 103 Outdoor expansion valve 105 Complete condensation Second valve position Second valve position Open Main condenser Second valve position First valve position Open Complete evaporation First valve position First valve position Open Main evaporation First valve position First valve position Open Outdoor heat exchanger shutdown First valve position First valve position closure

[0352] refer to Figure 2 The outdoor unit section 1 is in a state of complete condensation:

[0353] At this time, the outdoor heat exchanger 104 acts as a condenser. The refrigerant discharged from the compressor 101 enters the outdoor heat exchanger 104 for condensation through the first regulating valve 102, and then enters the liquid side main pipe 3; the evaporated refrigerant enters the compressor 101 through the low-pressure gas pipe 5 and the gas-liquid separator 108.

[0354] refer to Figure 3 The outdoor unit 1 is in the main condensation state:

[0355] At this time, the outdoor heat exchanger 104 acts as a condenser, simultaneously supplying some refrigerant to the indoor unit 7 and / or the accumulator 201 for condensation. A portion of the refrigerant discharged from the compressor 101 enters the outdoor heat exchanger 104 for condensation via the first regulating valve 102, and then enters the liquid-side main pipe 3; the evaporated refrigerant returns to the gas-liquid separator 108 via the low-pressure gas pipe 5, and then enters the compressor 101. The other portion of the refrigerant discharged from the compressor 101 enters the high-pressure gas pipe 4 via the second regulating valve 103.

[0356] refer to Figure 4 The outdoor unit 1 is in a state of complete evaporation:

[0357] At this time, the outdoor heat exchanger 104 acts as an evaporator. The refrigerant discharged from the compressor 101 enters the high-pressure gas pipe 4 through the second regulating valve 103; the medium-pressure refrigerant from the indoor unit 7 and / or the accumulator 201 enters the outdoor heat exchanger 104 through the liquid side main pipe 3 for evaporation, and then returns to the gas-liquid separator 108 through the first regulating valve 102, and finally enters the compressor 101.

[0358] refer to Figure 5 The outdoor unit 1 is in the main evaporation state:

[0359] At this time, the outdoor heat exchanger 104 acts as an evaporator, simultaneously receiving refrigerant return gas from the indoor unit 7 and / or accumulator 201, which are undergoing evaporation. The refrigerant discharged from the compressor 101 enters the high-pressure gas pipe 4 via the second regulating valve 103; the medium-pressure refrigerant enters the outdoor heat exchanger 104 via the liquid-side main pipe 3 for evaporation, then enters the gas-liquid separator 108 via the first regulating valve 102, and finally enters the compressor 101. Meanwhile, the refrigerant discharged from the indoor unit 7 and / or accumulator 201, which acts as the evaporator, enters the gas-liquid separator 108 via the low-pressure gas pipe 5, and finally enters the compressor 101.

[0360] refer to Figure 6 Outdoor unit 1 is in the outdoor heat exchanger off state:

[0361] At this time, the outdoor heat exchanger 104 is not working. The refrigerant discharged from the compressor 101 enters the accumulator 201 and / or the indoor unit 7, which acts as a condenser, through the second regulating valve 103 and the high-pressure gas pipe 4 for condensation; the refrigerant discharged from the accumulator 201 and / or the indoor unit 7, which acts as an evaporator, enters the gas-liquid separator 108 through the low-pressure gas pipe 5, and then enters the compressor 101 through the gas-liquid separator 108.

[0362] The energy storage section 2 includes an accumulator 201, which is connected to the outdoor unit section 1 and the indoor unit section via gas pipes and liquid pipes. By switching and combining the first regulating valve 102 and the second regulating valve 103, various refrigerant circulation paths with different functions can be realized.

[0363] The first port 201a of the accumulator 201 is connected to the outlet of the compressor 101 through the first gas pipe 202, connected to the liquid-side main pipe 3 through the first liquid pipe 204, and connected to the liquid-side main pipe 3 through the third liquid pipe 213.

[0364] The second port 201b of the accumulator 201 is connected to the first liquid pipe 204 through the second liquid pipe 205 and to the gas-liquid separator 108 through the second gas pipe 203.

[0365] A distributor 214 is arranged at the first port 201a of the accumulator 201. An energy storage expansion valve 206 and a cold storage check valve 207 are arranged on the first liquid pipe 204, with the energy storage expansion valve 206 closer to the first port 201a of the accumulator 201 relative to the cold storage check valve 207. A high-pressure gas valve 208 is arranged on the first gas pipe 202. A cold release check valve 209 is arranged on the third liquid pipe 213, a cold release valve 212 is arranged on the second liquid pipe 205, and a heat release valve 210 is arranged on the second gas pipe 203. A bypass valve 211 is also arranged between the connection between the first liquid pipe 204 and the liquid-side main pipe 3, and between the connection between the third liquid pipe 213 and the liquid-side main pipe 3.

[0366] The accumulator 201 is filled with energy storage material and is equipped with a refrigerant pipe. The refrigerant flows in the pipe and exchanges heat fully with the energy storage material. The energy storage material can both store and release cold or store and release heat.

[0367] Accumulator 201 can function as an evaporator, condenser, or subcooler. The control methods for high-pressure gas valve 208, heat release valve 210, cold release valve 212, and energy storage expansion valve 206 under different states of accumulator 201 are shown in Table 2.

[0368] Table 2 - Energy Accumulator Section 2

[0369] state High-pressure air valve 208 Heat release valve 210 Cooling valve 212 Energy storage expansion valve 206 Evaporator closure Open closure Open subcooler closure closure Open closure Condenser Open closure Open closure

[0370] refer to Figure 7 The accumulator 201 acts as an evaporator: refrigerant flowing from the indoor unit and / or outdoor unit is throttled by the accumulator expansion valve 206 and enters the accumulator 201 from its first port 201a for evaporation. Refrigerant flowing from the second port 201b of the accumulator 201 flows out through the second gas pipe 203. In this state, two-phase refrigerant enters the accumulator 201 through its first port 201a and the distributor 214, and flows out from its second port 201b.

[0371] When the accumulator 201 is used as an evaporator, it can be further subdivided into evaporative cold storage and evaporative heat release. The difference between these two states lies in the different pre-state of the accumulator 201 and their different purposes.

[0372] When the accumulator 201 has not yet stored any cold or heat, it can enter the evaporative cold storage state. At this time, the condensed refrigerant enters the accumulator 201 and stores the cold energy in the accumulator 201 in preparation for the next release of cold.

[0373] Only after the accumulator 201 has stored heat can it enter the evaporation and heat release state. The refrigerant after condensation enters the accumulator 201, absorbs the heat stored in the accumulator 201 and evaporates, with the purpose of undertaking part or all of the evaporation load of the refrigeration cycle.

[0374] refer to Figure 8 The accumulator 201 acts as a subcooler: refrigerant enters the accumulator 201 through the cold storage check valve 207 and the second liquid pipe 205 for subcooling. After increasing the subcooling degree, it flows from the accumulator 201 to the third liquid pipe 213 and then out through the third liquid pipe 213. In this state, liquid refrigerant enters through the second port 201b of the accumulator 201 and flows out from the first port 201a of the accumulator 201 and the distributor 214.

[0375] refer to Figure 9The accumulator 201 acts as a condenser: refrigerant enters the accumulator 201 through the first gas pipe 202 and the second liquid pipe 205 for condensation, flows from the accumulator 201 to the third liquid pipe 213, and then flows out through the third liquid pipe 213. In this state, gaseous refrigerant enters through the second port 201b of the accumulator 201, and after condensation, liquid refrigerant flows out from the first port 201a of the accumulator 201 and the distributor 214.

[0376] The accumulator 201, as a condenser, can be further subdivided into condensation and heat release and condensation and heat storage. The difference between these two states lies in the different initial states of the accumulator 201 and their different purposes.

[0377] Once the accumulator 201 has stored cold energy, it can enter the condensation and release state. At this time, the high-temperature and high-pressure refrigerant enters the accumulator 201, absorbs the cold energy stored in the accumulator 201 and condenses, with the purpose of undertaking part or all of the condensation load of the refrigeration cycle.

[0378] When the accumulator 201 has not yet stored any cold or heat, it can enter the condensation and heat storage state. At this time, high-temperature and high-pressure refrigerant enters the accumulator 201 and stores the heat in the accumulator 201 in preparation for the next heat release.

[0379] The indoor unit includes multiple indoor heat exchangers 7 and an indoor expansion valve 701. The mode switching section 6 includes a third gas pipe 605, a fourth liquid pipe 604, a cooling valve 602, and a heating valve 603.

[0380] One end of the fourth liquid pipe 604 is connected to the liquid-side main pipe 3, and the other end is connected to one end of the indoor heat exchanger 7. The indoor expansion valve 701 is arranged on the fourth liquid pipe 604.

[0381] One end of the third gas pipe 605 is connected to the other end of the indoor heat exchanger 7, and the other end is divided into a first line and a second line. The first line is connected to the high-pressure gas pipe 4, and the second line is connected to the low-pressure gas pipe 5. The cooling valve 602 is located in the second line. The heating valve 603 is located in the first line.

[0382] Each indoor heat exchanger 7 is independently equipped with a fourth liquid pipe 604, an indoor expansion valve 701, a third gas pipe 605, a cooling valve 602, and a heating valve 603.

[0383] The indoor heat exchanger 7 in the indoor unit can function as either an evaporator or a condenser. The control methods for the cooling valve 602, heating valve 603, and indoor expansion valve 701 of the indoor heat exchanger 7 under different states are shown in Table 3.

[0384] Table 3 - Internal Unit and Mode Conversion Sections 6

[0385] state Refrigeration valve 602 Heating valve 603 Indoor expansion valve 701 Evaporator Open closure Open Condenser closure Open Open

[0386] refer to Figure 10 The indoor heat exchanger 7 acts as an evaporator. The refrigerant enters the indoor heat exchanger 7 through the third liquid pipe 604 for evaporation, and then flows out through the refrigeration valve 602.

[0387] refer to Figure 11 The indoor heat exchanger 7 acts as a condenser. The refrigerant enters the indoor heat exchanger 7 through the heating valve 603, is condensed, and then flows out through the third liquid pipe 604.

[0388] The air conditioning system provided in this embodiment can achieve at least thirty-seven operating modes by switching and combining different states of the outdoor unit 1, the energy storage unit 2, and the indoor unit / mode switching unit, as well as by opening and closing the bypass valve 211. These modes are as follows:

[0389] First working mode - Normal full cooling; Second working mode - Normal main cooling; Third working mode - Full cold storage; Fourth working mode - Cold storage and full cooling simultaneously; Fifth working mode - Cold storage and full heating simultaneously (outdoor unit condenser); Sixth working mode - Cold storage and full heating simultaneously (outdoor unit evaporator); Seventh working mode - Cold storage and main cooling simultaneously; Eighth working mode - Cold storage and main heating simultaneously (outdoor unit evaporator); Ninth working mode - Cold storage and main heating simultaneously (outdoor unit condenser); Tenth working mode - Subcooling and full cooling simultaneously; Eleventh working mode - Subcooling and main cooling simultaneously; Twelfth working mode - Condensation and full cooling simultaneously; Thirteenth working mode - Condensation and main cooling simultaneously; Fourteenth working mode - Parallel cold release and full cooling simultaneously; Fifteenth working mode - Parallel cold release and main cooling simultaneously; Sixteenth working mode - Normal full heating; Seventeenth working mode - Normal main heating; Eighteenth working mode - Full heat storage; Nineteenth working mode - Heat storage and full heating simultaneously; Twentieth working mode - Heat storage and full cooling simultaneously... The following are the operating modes: Mode 1 - Full cooling (outdoor unit evaporation); Mode 22 - Heat storage and full cooling (outdoor unit condensation); Mode 33 - Heat storage and main unit heating; Mode 4 - Heat storage and main unit cooling (outdoor unit condensation); Mode 5 - Mixed heat release and full heating; Mode 6 - Mixed heat release and main unit heating; Mode 7 - Independent heat release and full heating; Mode 8 - Independent heat release and main unit heating; Mode 9 - Discontinuous heating and defrosting; Mode 10 - Continuous heating, defrosting, and full heating; Mode 11 - Continuous heating, defrosting, and main unit heating; Mode 32 - Continuous heating, defrosting, and main unit cooling; Mode 33 - Conventional heat recovery; Mode 34 - Cold storage and heat recovery; Mode 35 - Heat storage and heat recovery; Mode 36 - Cold release and heat recovery; Mode 37 - Heat release and heat recovery.

[0390] In the indoor unit section, "evaporation > condensation" means that some indoor heat exchangers act as evaporators and some as condensers, and the evaporation load is greater than the condensation load; "evaporation < condensation" means that some indoor heat exchangers act as evaporators and some as condensers, and the evaporation load is less than the condensation load.

[0391]

[0392]

[0393]

[0394]

[0395] The following is in conjunction with the appendix Figure 12 The piping and valve connections of the second embodiment of the air conditioning system are described in detail.

[0396] refer to Figure 12 The second embodiment of the air conditioning system differs from the first embodiment in that: a first gas pipe 202 is connected at its first end to the outlet of the compressor 101, and at its second end to the first liquid pipe 204. The connection between the second end of the first gas pipe 202 and the first liquid pipe 204 is located between the energy storage expansion valve 206 and the cold storage check valve 207. A high-pressure gas valve 208 is located on the first gas pipe 202.

[0397] The second embodiment of the air conditioning system differs from the first embodiment in that the end of the original first air pipe 202 that was connected to the high-pressure air pipe 4 is instead connected to the outlet of the compressor 101.

[0398] The opening and closing of each valve and the refrigerant flow path in the second embodiment of the air conditioning system are consistent with those in the first embodiment of the air conditioning system.

[0399] The first embodiment has a shorter first gas pipe 202, which significantly reduces the amount of piping material needed when the outdoor unit 1 and the energy storage device 2 are installed at a greater distance. In the second embodiment, since the first gas pipe 202 is installed between the compressor 101 and the second regulating valve 103, the high-pressure gas valve 208 can be opened before the second regulating valve 103 completes its reversing action, allowing refrigerant to pass through the first gas pipe 202, thus improving the response speed of the energy storage device 201. Therefore, the first embodiment has the advantage of saving piping material, while the second embodiment has the advantage of faster response. The following is a detailed description in conjunction with the appendix... Figures 13 to 15 The piping and valve connections of the third embodiment of the air conditioning system are described in detail.

[0400] refer to Figure 13The difference between the third embodiment of the air conditioning system and the first embodiment is that the third embodiment adds a storage container 220 to the first embodiment. By storing and releasing the refrigerant through the storage container 220, the amount of refrigerant in different operating modes can be controlled, ensuring that the amount of refrigerant circulating in the system matches the refrigerant demand in different operating modes, thus achieving the best heat exchange effect.

[0401] Storage container 220 has a first interface 220a, a second interface 220b, and a third interface 220c. The first interface 220a and the second interface 220b are located above the third interface 220c. The first interface 220a is connected to the liquid-side main pipe 3 via a liquid inlet valve 221. The second interface 220b is connected to the first gas pipe 202 via a pressurization valve 222. The second interface 220b is also connected to the low-pressure gas pipe 5 via a third throttling device 225 and a gas balance valve 224. The third interface 220c is connected to the low-pressure gas pipe 5 via a third throttling device 225 and a drain valve 223.

[0402] The storage container 220 has three states: non-operating state, refrigerant storage state, and refrigerant release state. All three states can be used in different system modes (conventional cooling, full cold storage, etc.).

[0403] When the storage container 220 is not in operation, the inlet valve 221, the pressurization valve 222, the drain valve 223, and the gas balance valve 224 are all closed.

[0404] refer to Figure 14 When the current operating mode determines that the storage container 220 needs to be started to store refrigerant, the liquid inlet valve 221 and the gas balance valve 224 open, while the pressurization valve 222 and the drain valve 223 close. The gas balance valve 224 opens, keeping the pressure inside the storage container 220 at a low pressure. The liquid inlet valve 221 opens, keeping the refrigerant inlet pipe inside the storage container 220 at a medium pressure. The refrigerant enters the storage container 220 under the action of the pressure difference.

[0405] refer to Figure 15 When the current operating mode determines that the storage container 220 needs to release refrigerant, the inlet valve 221 and the gas balance valve 224 are closed, while the pressurization valve 222 and the drain valve 223 are opened. The opening of the drain valve 223 puts the third port 220c of the storage container 220 under low pressure, and the opening of the pressurization valve 222 puts the pressure inside the storage container 220 under high pressure. Under the influence of gravity and pressure difference, the refrigerant inside the storage container 220 is discharged from the storage container 220 and enters the pipeline circulation.

[0406] The following is in conjunction with the appendix Figures 16 to 18 The pipe and valve connections of the fourth embodiment of the air conditioning system are described in detail.

[0407] refer to Figure 16 The fourth embodiment of the air conditioning system differs from the first embodiment in that it adds a storage container 220 to the first embodiment. By storing and releasing the refrigerant through the storage container 220, the amount of refrigerant under different operating modes can be controlled, ensuring that the amount of refrigerant circulating in the system matches the refrigerant demand of different operating modes, thus achieving optimal heat exchange performance.

[0408] The storage container 220 has a fourth interface 220a' and a fifth interface 220c'. The fourth interface 220a' is located below the fifth interface 220c'. The fourth interface 220a' is connected to the liquid-side main pipe 3 through the gas balance valve 224, and the fifth interface 220c' is connected to the low-pressure gas pipe 5 through the drain valve 223 and the third throttling device 225.

[0409] The storage container 220 has three states: non-operating state, refrigerant storage state, and refrigerant release state. All three states can be used in different system modes (conventional cooling, full cold storage, etc.).

[0410] When the storage container 220 is not in operation, both the drain valve 223 and the gas balance valve 224 are closed.

[0411] refer to Figure 17 When it is determined that the current operating mode requires the storage container 220 to store refrigerant, both the drain valve 223 and the gas balance valve 224 are opened. Under the action of pressure difference, the refrigerant enters the storage container 220 through the gas balance valve 224 and the fourth port 220a', and flows out of the storage container 220 through the drain valve 223.

[0412] refer to Figure 18 When it is determined that the current operating mode requires the storage container 220 to release refrigerant, the gas balance valve 224 closes and the drain valve 223 opens. The refrigerant inside the storage container 220 flows out of the drain valve 223 under the action of gravity and pressure difference and enters the pipeline circulation.

[0413] The refrigerant tank provided in the third embodiment releases refrigerant more quickly because the high-temperature, high-pressure refrigerant is used to increase the internal pressure of the tank and evaporate the refrigerant when the pressure valve 222 is opened. The refrigerant tank provided in the fourth embodiment uses fewer connecting pipes, saves materials, and is simpler to control.

[0414] The air conditioning system provided in this embodiment is a multi-functional energy storage air conditioning system based on a heat recovery unit. It can provide energy storage and release services for various different power load transfer scenarios and can provide continuous heating while defrosting.

[0415] Some embodiments also provide a control device for an air conditioning system, including:

[0416] The memory is configured to store instructions;

[0417] The processor is coupled to the memory and is configured to execute instructions stored in the memory to implement the control method of the air conditioning system in the above embodiments.

[0418] Some embodiments also provide a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the control method of the air conditioning system in the above embodiments.

[0419] It should be noted that some "pipes" and "valves" in the embodiments of this disclosure are limited by adjectives such as "gas", "liquid", "cold" or "hot". These adjectives are only used to distinguish "pipes" and "valves" in different positions or with different connection relationships, and do not limit the "pipes" and "valves" to necessarily having the functions defined by the adjectives. For example, "gas pipe" does not limit the flow of gas, and "liquid pipe" does not limit the flow of liquid. They are only used to distinguish pipelines with different connection relationships. Similarly, this applies to "liquid valve", "gas valve", "hot valve", "cold valve", etc.

[0420] Based on the embodiments disclosed above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0421] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. An air conditioning system, characterized in that, include: Compressor (101); Outdoor heat exchanger (104); At least two indoor heat exchangers (7); The energy storage device (201) includes a first port (201a) and a second port (201b); A first regulating valve (102) is located downstream of the compressor (101), and the first regulating valve (102) is connected to the compressor (101), the outdoor heat exchanger (104), the accumulator (201), and the indoor heat exchanger (7); and The second regulating valve (103) is also located downstream of the compressor (101), and the second regulating valve (103) is connected to the compressor (101), the accumulator (201), and the indoor heat exchanger (7) respectively; Wherein, the first regulating valve (102) and the second regulating valve (103) are configured to adjust their own valve positions such that at least one of the outdoor heat exchanger (104), the at least two indoor heat exchangers (7), and the accumulator (201) is configured as a condenser and at least another is configured as an evaporator; and the accumulator (201) is configured such that, in the evaporator state, the first port (201a) is the refrigerant inlet and the second port (201b) is the refrigerant outlet, and the accumulator (201) is configured such that, in the condenser state, the second port (201b) is the refrigerant inlet and the first port (201a) is the refrigerant outlet; The at least two indoor heat exchangers (7) are arranged in parallel; the air conditioning system further includes: One end of the liquid-side main pipe (3) is connected to the first port (201a) of the accumulator (201) and the outdoor heat exchanger (104); the other end is connected to one end of the at least two indoor heat exchangers (7). A high-pressure gas pipe (4) is connected at one end to the second regulating valve (103) and at the other end to the other end of each of the at least two indoor heat exchangers (7); and The low-pressure gas pipe (5) is connected at one end to the second port (201b) of the accumulator (201) and the inlet of the compressor (101), respectively, and at the other end to the other end of the at least two indoor heat exchangers (7); It also includes a first liquid pipe (204) and a third liquid pipe (213), and the first port (201a) of the accumulator (201) is connected to the liquid-side main pipe (3) through the first liquid pipe (204) and the third liquid pipe (213), respectively; It also includes an energy storage expansion valve (206) and a cold storage check valve (207) disposed on the first liquid pipe (204). The inlet of the cold storage check valve (207) is connected to the liquid side main pipe (3), and the outlet of the cold storage check valve (207) is connected to the energy storage expansion valve (206). It also includes a cooling check valve (209) provided in the third liquid pipe (213), the inlet of which is connected to the first port (201a) of the accumulator (201); Also includes: The second liquid pipe (205) has a first end connected to the first liquid pipe (204) and a second end connected to the second port (201b) of the accumulator (201); and A cooling valve (212) is provided on the second liquid pipe (205).

2. The air conditioning system according to claim 1, characterized in that, The first regulating valve (102) includes a first valve port, a second valve port, a third valve port, and a fourth valve port; The first valve port of the first regulating valve (102) is connected to the outlet of the compressor (101), the second valve port of the first regulating valve (102) is connected to one end of the outdoor heat exchanger (104), the third valve port of the first regulating valve (102) is connected to the low-pressure gas pipe (5) and the inlet of the compressor (101) respectively; the fourth valve port of the first regulating valve (102) is connected to the low-pressure gas pipe (5) and the inlet of the compressor (101) respectively through the first throttling element. Wherein, when the first regulating valve (102) is in the first valve position, the first valve port and the fourth valve port of the first regulating valve (102) are connected, and the second valve port and the third valve port of the first regulating valve (102) are connected; When the first regulating valve (102) is in the second valve position, the first valve port and the second valve port of the first regulating valve (102) are connected, and the third valve port and the fourth valve port of the first regulating valve (102) are connected.

3. The air conditioning system according to claim 1 or 2, characterized in that, The second regulating valve (103) includes a first valve port, a second valve port, a third valve port, and a fourth valve port; The first valve port of the second regulating valve (103) is connected to the outlet of the compressor (101), and the second valve port of the second regulating valve (103) is connected to the low-pressure gas pipe (5) and the inlet of the compressor (101) respectively through the second throttling element; the third valve port of the second regulating valve (103) is connected to the low-pressure gas pipe (5) and the inlet of the compressor (101) respectively; the fourth valve port of the second regulating valve (103) is connected to the high-pressure gas pipe (4); Wherein, when the second regulating valve (103) is in the first valve position, the first valve port and the fourth valve port of the second regulating valve (103) are connected, and the second valve port and the third valve port of the second regulating valve (103) are connected; When the second regulating valve (103) is in the second valve position, the first valve port and the second valve port of the second regulating valve (103) are connected, and the third valve port and the fourth valve port of the second regulating valve (103) are connected.

4. The air conditioning system according to claim 1, characterized in that, Also includes: The first subcooler (107) includes a first flow path and a second flow path; the first flow path connects the liquid-side main pipe (3) to the outdoor heat exchanger (104), and the second flow path is connected to the first regulating valve (102), the second regulating valve (103), the low-pressure gas pipe (5), and the inlet of the compressor (101) respectively.

5. The air conditioning system according to claim 4, characterized in that, Also includes: An outdoor expansion valve (105) is located on the flow path connecting the first flow path and the outdoor heat exchanger (104).

6. The air conditioning system according to claim 4, characterized in that, Also includes: The subcooled expansion valve (106) connects the first flow path and the second flow path.

7. The air conditioning system according to claim 1, characterized in that, Also includes: A bypass valve (211) is provided on the liquid-side main pipe (3) and is located between the connection between the second end of the first liquid pipe (204) and the liquid-side main pipe (3) and the connection between the second end of the third liquid pipe (213) and the liquid-side main pipe (3).

8. The air conditioning system according to claim 1, characterized in that, Also includes: The first gas pipe (202) has a first end connected to the high-pressure gas pipe (4) and a second end connected to the first liquid pipe (204). The connection between the second end of the first gas pipe (202) and the first liquid pipe (204) is located between the energy storage expansion valve (206) and the cold storage one-way valve (207). A high-pressure air valve (208) is located in the first air pipe (202).

9. The air conditioning system according to claim 1, characterized in that, Also includes: The first gas pipe (202) has a first end connected to the outlet of the compressor (101) and a second end connected to the first liquid pipe (204). The connection between the second end of the first gas pipe (202) and the first liquid pipe (204) is located between the energy storage expansion valve (206) and the cold storage check valve (207). A high-pressure air valve (208) is located in the first air pipe (202).

10. The air conditioning system according to claim 8 or 9, characterized in that, The connection between the first end of the second liquid pipe (205) and the first liquid pipe (204) is located between the connection between the second end of the first gas pipe (202) and the first liquid pipe (204) and the cold storage one-way valve (207).

11. The air conditioning system according to claim 8 or 9, characterized in that, It also includes a bypass valve (211), a storage container (220), an inlet valve (221), a pressurizing valve (222), a drain valve (223), a gas balance valve (224), and two third throttling devices (225); the storage container (220) has a first interface (220a), a second interface (220b), and a third interface (220c); the bypass valve (211) is located on the liquid-side main pipe (3), and is located between the connection between the second end of the first liquid pipe (204) and the liquid-side main pipe (3), and between the connection between the second end of the third liquid pipe (213) and the liquid-side main pipe (3); The first port (220a) of the storage container (220) is connected to the liquid-side main pipe (3), and the connection between the first port (220a) and the liquid-side main pipe (3) is located between the bypass valve (211) and the outdoor heat exchanger (104); the liquid inlet valve (221) is located on the pipeline connecting the first port (220a) and the liquid-side main pipe (3); The second port (220b) of the storage container (220) is connected to the first air pipe (202); the pressurization valve (222) is located on the pipe connecting the second port (220b) and the first air pipe (202); The second interface (220b) of the storage container (220) is also connected to the low-pressure gas pipe (5); the gas balance valve (224) is located on the pipeline connecting the second interface (220b) and the low-pressure gas pipe (5); The third port (220c) of the storage container (220) is connected to the low-pressure gas pipe (5); the drain valve (223) is located on the pipeline connecting the third port (220c) and the low-pressure gas pipe (5); The connection point between the third interface (220c) and the low-pressure gas pipe (5) is closer to the inlet of the compressor (101) than the connection point between the second interface (220b) and the low-pressure gas pipe (5). The two third throttling devices (225) are respectively located on the pipeline connecting the third interface (220c) and the low-pressure gas pipe (5), and on the pipeline connecting the second interface (220b) and the low-pressure gas pipe (5).

12. The air conditioning system according to claim 8 or 9, characterized in that, It also includes a bypass valve (211), a storage container (220), a drain valve (223), a gas balance valve (224), and a third throttling device (225); the storage container (220) has a fourth port (220a') and a fifth port (220c'); the bypass valve (211) is located on the liquid-side main pipe (3), and is located between the connection between the second end of the first liquid pipe (204) and the liquid-side main pipe (3), and between the connection between the second end of the third liquid pipe (213) and the liquid-side main pipe (3); The fourth port (220a') of the storage container (220) is connected to the liquid-side main pipe (3), and the connection between the fourth port (220a') and the liquid-side main pipe (3) is located between the bypass valve (211) and the outdoor heat exchanger (104); the gas balance valve (224) is located on the pipeline connecting the fourth port (220a') and the liquid-side main pipe (3); The fifth port (220c') of the storage container (220) is connected to the low-pressure gas pipe (5); the drain valve (223) is located on the pipeline connecting the fifth port (220c') and the low-pressure gas pipe (5); The third throttling device (225) is located on the pipeline connecting the fifth interface (220c') and the low-pressure gas pipe (5).

13. The air conditioning system according to claim 1, characterized in that, Also includes: The second port (201b) of the accumulator (201) is connected to the low-pressure gas pipe (5) via the heat release valve (210).

14. The air conditioning system according to claim 1, characterized in that, It also includes a liquid dispenser (214), which is located at the first port (201a) of the accumulator (201).

15. The air conditioning system according to claim 1, characterized in that, Also includes: The fourth liquid pipe (604) is connected at one end to the liquid-side main pipe (3) and at the other end to one end of the indoor heat exchanger (7); An indoor expansion valve (701) is arranged in the fourth liquid pipe (604); The third air pipe (605) is connected at one end to the other end of the indoor heat exchanger (7), and the other end is divided into a first path and a second path. The first path is connected to the high-pressure air pipe (4), and the second path is connected to the low-pressure air pipe (5). Refrigeration valve (602) is located in the second path; Heating valve (603) is located in the first channel.

16. The air conditioning system according to claim 15, characterized in that, Each of the indoor heat exchangers (7) is independently equipped with the fourth liquid pipe (604), the indoor expansion valve (701), the third gas pipe (605), the cooling valve (602), and the heating valve (603).

17. A control method for an air conditioning system according to any one of claims 1 to 16, the control method comprising: Determine the operating mode of the air conditioning system; The states of the outdoor heat exchanger (104), indoor heat exchanger (7), accumulator (201), first regulating valve (102) and second regulating valve (103) in the air conditioning system are controlled according to the preset control strategy corresponding to the working mode.

18. The control method for an air conditioning system according to claim 17, 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 unit (201) being in a non-working state, a state of releasing cold energy, or a state of releasing heat energy; 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 unit (201) being in a non-working state, a state of storing cold energy, or a state of storing heat energy.

19. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a normal full cooling mode; in the normal full cooling mode, the first regulating valve (102) is in the second valve position, the second regulating valve (103) is in the second valve position, and the accumulator (201) is in a non-working state; the outdoor heat exchanger (104) is used as a condenser, and the indoor heat exchanger (7) is used as an evaporator.

20. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a conventional main cooling mode; in the conventional main cooling mode, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, and the accumulator (201) is in a non-working state; the outdoor heat exchanger (104) is used as a condenser, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser; the evaporation load of the indoor heat exchanger (7) as an evaporator is greater than the condensation load of the indoor heat exchanger (7) as a condenser.

21. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a full cold storage mode; in the full cold storage mode, the first regulating valve (102) is in the second valve position, the second regulating valve (103) is in the second valve position, the indoor heat exchanger (7) is not working, the outdoor heat exchanger (104) is used as a condenser, and the accumulator (201) is used as an evaporator.

22. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a cold storage and full cooling mode; in the cold storage and full cooling mode, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the second valve position, the outdoor heat exchanger (104) is used as a condenser, the energy storage unit (201) is used as an evaporator, and the indoor heat exchanger (7) is also used as an evaporator.

23. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a cold storage and full heating mode; in the cold storage and full heating mode, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the energy storage unit (201) is used as an evaporator, and the indoor heat exchanger (7) is used as a condenser.

24. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a cold storage and full heating mode; in the cold storage and full heating mode, the first regulating valve (102) is located in the first valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the energy storage unit (201) is used as an evaporator, and the indoor heat exchanger (7) is used as a condenser.

25. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a cold storage and main cooling mode; in the cold storage and main cooling mode, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the energy storage unit (201) is used as an evaporator, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser; the evaporation load of the indoor heat exchanger (7) as an evaporator is greater than the condensation load of the indoor heat exchanger (7) as a condenser.

26. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a cold storage and main heating mode; in the cold storage and main heating mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the energy storage unit (201) is used as an evaporator, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser; the evaporation load of the indoor heat exchanger (7) as an evaporator is less than the condensation load of the indoor heat exchanger (7) as a condenser.

27. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a cold storage and main heating mode; in the cold storage and main heating mode, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the energy storage unit (201) is used as an evaporator, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser; the evaporation load of the indoor heat exchanger (7) as an evaporator is less than the condensation load of the indoor heat exchanger (7) as a condenser.

28. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a subcooling and releasing cooling mode and a full cooling mode. In the subcooling and releasing cooling mode, the first regulating valve (102) is in the second valve position, the second regulating valve (103) is in the second valve position, the outdoor heat exchanger (104) is used as a condenser, the accumulator (201) is used as a subcooler, and the indoor heat exchanger (7) is used as an evaporator.

29. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a subcooling and releasing cooling mode with simultaneous main cooling mode; in the subcooling and releasing cooling mode with simultaneous main cooling mode, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the accumulator (201) is used as a subcooler, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser; the evaporation load of the indoor heat exchanger (7) as an evaporator is greater than the condensation load of the indoor heat exchanger (7) as a condenser.

30. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a condensation and release cooling mode and a full cooling mode. In the condensation and release cooling mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is not working, the accumulator (201) is used as a condenser, and the indoor heat exchanger (7) is used as an evaporator.

31. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a condensation and release cooling mode with simultaneous main cooling mode. In the condensation and release cooling mode with simultaneous main cooling mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is not working, the accumulator (201) is used as a condenser, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is greater than the condensation load of the indoor heat exchanger (7) used as a condenser.

32. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include parallel cooling and full cooling modes; in the parallel cooling and full cooling modes, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the accumulator (201) is used as a condenser, and the indoor heat exchanger (7) is used as an evaporator.

33. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include parallel cooling and main cooling modes. In the parallel cooling and main cooling modes, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the energy storage device (201) is used as a condenser, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is greater than the condensation load of the indoor heat exchanger (7) used as a condenser.

34. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a normal full heating mode; in the normal full heating mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the accumulator (201) is not working, and the indoor heat exchanger (7) is used as a condenser.

35. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a conventional main heating mode; in the conventional main heating mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the accumulator (201) is not working, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser; the evaporation load of the indoor heat exchanger (7) as an evaporator is less than the condensation load of the indoor heat exchanger (7) as a condenser.

36. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a full heat storage mode; in the full heat storage mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the accumulator (201) is used as a condenser, and the indoor heat exchanger (7) is not working.

37. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a heat storage and full heating mode; in the heat storage and full heating mode, the first regulating valve (102) is located in the first valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the energy storage unit (201) is used as a condenser, and the indoor heat exchanger (7) is used as a condenser.

38. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a heat storage and full cooling mode; in the heat storage and full cooling mode, the first regulating valve (102) is located in the first valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the energy storage unit (201) is used as a condenser, and the indoor heat exchanger (7) is used as an evaporator.

39. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a heat storage and full cooling mode; in the heat storage and full cooling mode, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the energy storage device (201) is used as a condenser, and the indoor heat exchanger (7) is used as an evaporator.

40. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a heat storage and main heating mode; in the heat storage and main heating mode, the first regulating valve (102) is located in the first valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the energy storage unit (201) is used as a condenser, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is less than the condensation load of the indoor heat exchanger (7) used as a condenser.

41. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a heat storage and main cooling mode; in the heat storage and main cooling mode, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the energy storage device (201) is used as a condenser, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is greater than the condensation load of the indoor heat exchanger (7) used as a condenser.

42. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a heat storage and main cooling mode. In the heat storage and main cooling mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the energy storage unit (201) is used as a condenser, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is greater than the condensation load of the indoor heat exchanger (7) used as a condenser.

43. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a mixed heat release and full heating mode; in the mixed heat release and full heating mode, the first regulating valve (102) is located in the first valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the energy storage device (201) is used as an evaporator, and the indoor heat exchanger (7) is used as a condenser.

44. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a mixed heat release and main heating mode; in the mixed heat release and main heating mode, the first regulating valve (102) is located in the first valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as an evaporator, the energy storage device (201) is used as an evaporator, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is less than the condensation load of the indoor heat exchanger (7) used as a condenser.

45. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include independent heat release and full heating mode; in the independent heat release and full heating mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is not working, the accumulator (201) is used as an evaporator, and the indoor heat exchanger (7) is used as a condenser.

46. ​​The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include independent heat release and main heating modes. In the independent heat release and main heating modes, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is not working, the accumulator (201) is used as an evaporator, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) as an evaporator is less than the condensation load of the indoor heat exchanger (7) as a condenser.

47. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a discontinuous heating defrosting mode; in the discontinuous heating defrosting mode, the first regulating valve (102) is in the second valve position, the second regulating valve (103) is in the second valve position, the outdoor heat exchanger (104) is used as a condenser, the accumulator (201) is used as an evaporator, and the indoor heat exchanger (7) is not working.

48. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include continuous heating and defrosting and full heating modes; in the continuous heating and defrosting and full heating modes, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the accumulator (201) is used as an evaporator, and the indoor heat exchanger (7) is used as a condenser.

49. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include continuous heating and defrosting and main heating modes. In the continuous heating and defrosting and main heating modes, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the accumulator (201) is used as an evaporator, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is less than the condensation load of the indoor heat exchanger (7) used as a condenser.

50. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include continuous heating and defrosting and main cooling modes. In the continuous heating and defrosting and main cooling modes, the first regulating valve (102) is located in the second valve position, the second regulating valve (103) is located in the first valve position, the outdoor heat exchanger (104) is used as a condenser, the accumulator (201) is used as an evaporator, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is greater than the condensation load of the indoor heat exchanger (7) used as a condenser.

51. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a conventional heat recovery mode. In the conventional heat recovery mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is not working, the accumulator (201) is not working, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is equal to the condensation load of the indoor heat exchanger (7) used as a condenser.

52. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a cold storage and heat recovery mode; in the cold storage and heat recovery mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is not working, the accumulator (201) is used as an evaporator, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) as an evaporator is less than the condensation load of the indoor heat exchanger (7) as a condenser.

53. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a heat storage and heat recovery mode; in the heat storage and heat recovery mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is not working, the accumulator (201) is used as a condenser, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is greater than the condensation load of the indoor heat exchanger (7) used as a condenser.

54. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include a cooling release and heat recovery mode; in the cooling release and heat recovery mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is not working, the accumulator (201) is used as a condenser, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) used as an evaporator is greater than the condensation load of the indoor heat exchanger (7) used as a condenser.

55. The control method for an air conditioning system according to claim 17, characterized in that, The working modes of the air conditioning system include heat release and heat recovery mode; in the heat release and heat recovery mode, the first regulating valve (102) is in the first valve position, the second regulating valve (103) is in the first valve position, the outdoor heat exchanger (104) is not working, the accumulator (201) is used as an evaporator, part of the indoor heat exchanger (7) is used as an evaporator, and another part of the indoor heat exchanger (7) is used as a condenser. The evaporation load of the indoor heat exchanger (7) as an evaporator is less than the condensation load of the indoor heat exchanger (7) as a condenser.

56. A control device for an air conditioning system, comprising: The memory is configured to store instructions; A processor, coupled to the memory, is configured to execute instructions stored in the memory to implement the control method of the air conditioning system as claimed in any one of claims 17 to 55.

57. A computer-readable storage medium, wherein, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the control method of the air conditioning system as described in any one of claims 17 to 55.

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