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, an indoor heat exchanger, an accumulator comprising a first port and a second port, a first regulating valve located downstream of the compressor, the first regulating valve being connected with the outdoor heat exchanger, the accumulator and the compressor respectively, and a second regulating valve also located downstream of the compressor, the second regulating valve being connected with the compressor, the accumulator and the indoor heat exchanger respectively, 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, the 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 the refrigerant inlet end, and the second port is the refrigerant outlet end, as a condenser, the second port is the refrigerant inlet end, and the first port is the 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] Indoor heat exchanger;

[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 outdoor heat exchanger, the accumulator, and the compressor, 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 indoor heat exchanger, and the accumulator is configured as a condenser, and at least one of them 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 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; the other end is connected to one end of the indoor heat exchanger.

[0014] The gas-side main pipe is connected at one end to the second regulating valve and at the other end to the other end of the indoor heat exchanger; and

[0015] The first gas pipe is connected at one end to the second port of the accumulator and at the other end to the inlet of the compressor.

[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 first gas pipe and the inlet of the compressor respectively; the fourth valve port of the first regulating valve is connected to the first 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 first 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 first gas pipe and the inlet of the compressor respectively; and the fourth valve port of the second regulating valve is connected to the gas side main 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 first gas pipe, and the inlet of the compressor.

[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 second gas pipe has a first end connected to the gas-side main pipe and a second end connected to the first liquid pipe, and the connection point between the second end of the second 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 second air pipe.

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

[0039] The second 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 point between the second end of the second 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 second 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 second 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 second air pipe; the pressurization valve is located on the pipe connecting the second interface and the second air pipe.

[0047] The second interface of the storage container is also connected to the first air pipe; the gas balance valve is located on the pipe connecting the second interface and the first air pipe.

[0048] The third interface of the storage container is connected to the first air pipe; the drain valve is located on the pipe where the third interface is connected to the first air pipe.

[0049] Wherein, the connection point of the third interface to the first air pipe is closer to the inlet of the compressor than the connection point of the second interface to the first air pipe;

[0050] The two third throttling devices are respectively located on the pipeline connecting the third interface to the first air pipe and on the pipeline connecting the second interface to the first air 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 first air pipe; the drain valve is located on the pipe connecting the second interface and the first air pipe.

[0054] The third throttling device is located on the pipeline connecting the second interface and the first air 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 first 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 one aspect of this disclosure, a control method for the air conditioning system described above is provided, the control method comprising:

[0059] Determine the operating mode of the air conditioning system;

[0060] 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.

[0061] In some embodiments, determining the operating mode of the air conditioning system includes:

[0062] 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.

[0063] In some embodiments, the operating mode of the air conditioning system includes a normal cooling mode; in the normal 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.

[0064] 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.

[0065] In some embodiments, the air conditioning system operates in a mode that includes both cold storage and cooling. In the cold storage and 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.

[0066] In some embodiments, the operating mode of the air conditioning system includes a subcooling release mode; in the subcooling release 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 a subcooler, and the indoor heat exchanger is used as an evaporator.

[0067] In some embodiments, the air conditioning system operates in a condensation-release mode; in the condensation-release mode, the first regulating valve is in the first valve position, the second regulating valve is in the second 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.

[0068] In some embodiments, the air conditioning system operates in a parallel cooling mode; in the parallel 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 accumulator is used as a condenser, and the indoor heat exchanger is used as an evaporator.

[0069] In some embodiments, the operating mode of the air conditioning system includes a conventional heating mode; in the conventional 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.

[0070] 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 second 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.

[0071] In some embodiments, the air conditioning system operates in a mode that includes both heat storage and heating. In the mode of both heat storage and heating, the first regulating valve is in a first valve position, the second regulating valve is in a 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.

[0072] In some embodiments, the operating mode of the air conditioning system includes a mixed heat release mode; in the mixed heat release 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.

[0073] In some embodiments, the operating mode of the air conditioning system includes an independent heat release mode; in the independent heat release 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.

[0074] 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.

[0075] In some embodiments, the operating mode of the air conditioning system includes a continuous heating and defrosting mode; in the continuous heating and defrosting 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.

[0076] In one aspect of this disclosure, a control device for an air conditioning system is provided, comprising:

[0077] The memory is configured to store instructions;

[0078] 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.

[0079] 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.

[0080] Based on the above technical solution, this disclosure has at least the following beneficial effects:

[0081] 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 can be achieved. Furthermore, the bidirectional refrigerant accumulator facilitates both 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

[0082] 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:

[0083] Figure 1 This is a schematic diagram of an air conditioning system provided according to some embodiments of the present disclosure.

[0084] Figure 2 This is a schematic diagram of refrigerant flow in a first operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0085] Figure 3 This is a schematic diagram of refrigerant flow in a second operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0086] Figure 4 This is a schematic diagram of refrigerant flow in a third operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0087] Figure 5 This is a schematic diagram of refrigerant flow in a fourth operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0088] Figure 6 This is a schematic diagram of refrigerant flow in a fifth operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0089] Figure 7 This is a schematic diagram of refrigerant flow in a sixth operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0090] Figure 8 This is a schematic diagram of refrigerant flow in the seventh operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0091] Figure 9 This is a schematic diagram of refrigerant flow in an eighth operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0092] Figure 10 This is a schematic diagram of refrigerant flow in the ninth operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0093] Figure 11 This is a schematic diagram of refrigerant flow in the tenth operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0094] Figure 12 This is a schematic diagram of refrigerant flow in the eleventh operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0095] Figure 13This is a schematic diagram of refrigerant flow in the twelfth operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0096] Figure 14 This is a schematic diagram of refrigerant flow in the thirteenth operating mode of an air conditioning system provided according to some embodiments of the present disclosure.

[0097] Figure 15 This is a schematic diagram of an air conditioning system provided according to other embodiments of the present disclosure.

[0098] Figure 16 This is a schematic diagram of an air conditioning system with a storage container provided according to some embodiments of the present disclosure.

[0099] Figure 17 This is a schematic diagram of refrigerant flow in a storage container storing refrigerant according to some embodiments of the present disclosure.

[0100] Figure 18 This is a schematic diagram of refrigerant flow in a storage container under refrigerant release conditions according to some embodiments of the present disclosure.

[0101] Figure 19 This is a schematic diagram of an air conditioning system with a storage container provided according to other embodiments of the present disclosure.

[0102] Figure 20 This is a schematic diagram of refrigerant flow in a storage container storing refrigerant according to other embodiments of the present disclosure.

[0103] Figure 21 This is a schematic diagram of refrigerant flow in a storage container under refrigerant release conditions according to other embodiments of the present disclosure.

[0104] Explanation of reference numerals in the attached figures:

[0105] 1-Outdoor unit; 2-Energy storage unit; 3-Liquid side main pipe; 4-Gas side main pipe;

[0106] 101-Compressor; 102-First regulating valve; 103-Second regulating valve; 104-Outdoor heat exchanger; 105-Outdoor expansion valve; 106-Subcooled expansion valve; 107-Subcooler; 108-Gas-liquid separator;

[0107] 201-Accumulator; 201a-First port; 201b-Second port; 202-Second gas pipe; 203-First 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;

[0108] 220 - Storage container; 220a - First interface; 220b - Second interface; 220c - Third interface; 220a' - First interface; 220c' - Second interface; 221 - Inlet valve; 222 - Pressurization valve; 223 - Drain valve; 224 - Gas balance valve; 225 - Third throttling element;

[0109] 7-Indoor heat exchanger.

[0110] 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

[0111] 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.

[0112] 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.

[0113] 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, an indoor heat exchanger 7, an accumulator 201, a first regulating valve 102, and a second regulating valve 103.

[0114] The energy storage device 201 includes a first port 201a and a second port 201b.

[0115] 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, and the accumulator 201 respectively.

[0116] 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.

[0117] The first regulating valve 102 and the second regulating valve 103 are configured to adjust their own valve positions so that at least one of the outdoor heat exchanger 104, the indoor heat exchanger 7, and the accumulator 201 is configured as a condenser, and at least one of them 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.

[0118] 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.

[0119] The accumulator 201 is located between the outdoor heat exchanger 104 and the indoor heat exchanger 7.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] Furthermore, in the embodiments provided in this disclosure, the accumulator 201 with bidirectional refrigerant inlet, in conjunction with the first regulating valve 102 and the second regulating valve 103, can achieve continuous heating and defrosting functions. The bidirectional refrigerant inlet 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.

[0124] In some embodiments, the air conditioning system further includes a distributor 214, which is located at the first port 201a of the accumulator 201.

[0125] Optionally, the dispenser 214 includes a capillary tube.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] The number of indoor heat exchangers 7 is one, two, or more. 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 the indoor heat exchanger 7.

[0132] In some embodiments, the air conditioning system further includes an air-side main pipe 4, one end of which is connected to the second regulating valve 103, and the other end of which is connected to the other end of the indoor heat exchanger 7.

[0133] In some embodiments, the air conditioning system further includes a first air pipe 203, one end of which is connected to the second port 201b of the accumulator 201; the other end of which is connected to the inlet of the compressor 101.

[0134] 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.

[0135] 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 first gas pipe 203 and the inlet of the compressor 101 respectively, and the fourth valve port E of the first regulating valve 102 is connected to the first gas pipe 203 and the inlet of the compressor 101 respectively through the first throttling element.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] Optionally, the first regulating valve 102 includes a four-way valve.

[0140] Optionally, the first throttling element includes a capillary.

[0141] 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.

[0142] 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 first gas pipe 203 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 first gas pipe 203 and the inlet of the compressor 101 respectively. The fourth valve port E of the second regulating valve 103 is connected to the gas side main pipe 4.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] Optionally, the second regulating valve 103 includes a four-way valve.

[0147] Optionally, the second throttling element includes a capillary.

[0148] 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.

[0149] 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.

[0150] Optionally, the outdoor expansion valve 105 includes an electronic expansion valve.

[0151] 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 first gas pipe 203, and the inlet of the compressor 101, respectively.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] Optionally, the subcooled expansion valve 106 includes an electronic expansion valve.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] In some embodiments, the air conditioning system further includes an energy storage expansion valve 206 disposed on the first liquid pipe 204.

[0162] 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.

[0163] Optionally, the energy storage expansion valve 206 includes an electronic expansion valve.

[0164] 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.

[0165] 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.

[0166] refer to Figure 1In some embodiments, the air conditioning system further includes a second gas pipe 202, the first end of which is connected to the outlet of the compressor 101, the second end of which is connected to the first liquid pipe 204, and the connection between the second end of the second 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.

[0167] In some embodiments, the air conditioning system further includes a high-pressure valve 208, which is disposed in the second gas pipe 202.

[0168] When the high-pressure air valve 208 is opened, the second air pipe 202 is connected; when the high-pressure air pipe 208 is closed, the second air pipe 202 is disconnected.

[0169] refer to Figure 15 In some other embodiments, the air conditioning system further includes a second gas pipe 202, the first end of which is connected to the gas-side main pipe 4, the second end of which is connected to the first liquid pipe 204, and the connection between the second end of the second 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.

[0170] In some other embodiments, the air conditioning system also includes a high-pressure valve 208, which is located in the second gas pipe 202.

[0171] When the high-pressure air valve 208 is opened, the second air pipe 202 is connected; when the high-pressure air pipe 208 is closed, the second air pipe 202 is disconnected.

[0172] 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, 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 is located between the connection between the second end of the second gas pipe 202 and the first liquid pipe 204 and the cold storage one-way valve 207.

[0173] In some embodiments, the air conditioning system further includes a cooling valve 212, which is disposed on the second liquid pipe 205.

[0174] 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.

[0175] refer to Figure 1In some embodiments, the air conditioning system further includes a heat release valve 210, through which the second port 201b of the accumulator 201 is connected to the first gas pipe 203. When the heat release valve 210 is open, the pipeline between the second port 201b of the accumulator 201 and the first 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 first gas pipe 203 is disconnected.

[0176] refer to Figures 16 to 18 In some embodiments, the air conditioning system also includes a storage container 220.

[0177] 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 and the liquid-side main pipe 3 and the outdoor heat exchanger 104.

[0178] 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.

[0179] 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.

[0180] 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 second air tube 202.

[0181] 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 second gas pipe 202.

[0182] 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.

[0183] 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 first air tube 203.

[0184] In some embodiments, the air conditioning system further includes an air balance valve 224, which is located on the pipeline connecting the second interface 220b and the first air pipe 203.

[0185] When the gas balance valve 224 is opened, the pipeline between the second port 220b and the first air pipe 203 is connected; when the gas balance valve 224 is closed, the pipeline between the second port 220b and the first air pipe 203 is disconnected.

[0186] 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 first air tube 203.

[0187] In some embodiments, the air conditioning system further includes a drain valve 223, which is located on the pipeline connecting the third interface 220c and the first gas pipe 203.

[0188] When the drain valve 223 is opened, the pipeline between the third port 220c and the first air pipe 203 is connected; when the drain valve 223 is closed, the pipeline between the third port 220c and the first air pipe 203 is disconnected.

[0189] The connection point between the third interface 220c and the first air pipe 203 is closer to the inlet of the compressor 101 than the connection point between the second interface 220b and the first air pipe 203.

[0190] 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 pipe where the third interface 220c is connected to the first gas pipe 203, and on the pipe where the second interface 220b is connected to the first gas pipe 203.

[0191] Optionally, the third throttling element 225 includes a capillary.

[0192] refer to Figures 19 to 21 In other embodiments, the air conditioning system also includes a storage container 220.

[0193] The storage container 220 has a first interface 220a', which is connected to the liquid-side main pipe 3. 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 and the liquid-side main pipe 3, and the outdoor heat exchanger 104.

[0194] In some embodiments, the air conditioning system further includes an air balance valve 224, which is located on the pipeline connecting the first interface 220a' to the liquid side main pipe 3.

[0195] When the gas balance valve 224 is opened, the pipeline between the first port 220a' and the liquid-side main pipe 3 is connected; when the gas balance valve 224 is closed, the pipeline between the first port 220a' and the liquid-side main pipe 3 is disconnected.

[0196] In some embodiments, the storage container 220 further has a second interface 220c'. The second interface 220c' of the storage container 220 is connected to the first air tube 203.

[0197] In some embodiments, the air conditioning system further includes a drain valve 223. The drain valve 223 is located on the pipeline connecting the second interface 220c' and the first gas pipe 203.

[0198] When the drain valve 223 is opened, the pipeline between the second port 220c' and the first air pipe 203 is connected; when the drain valve 223 is closed, the pipeline between the second port 220c' and the first air pipe 203 is disconnected.

[0199] In some embodiments, the air conditioning system further includes a third throttling element 225. The third throttling element 225 is disposed on the pipe where the second interface 220c' is connected to the first gas pipe 203.

[0200] Optionally, the third throttling element 225 includes a capillary.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] Some embodiments also provide a control method for an air conditioning system, the control method including:

[0206] Determine the operating mode of the air conditioning system;

[0207] 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.

[0208] In some embodiments, determining the operating mode of the air conditioning system includes:

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] The air conditioning system provided in this embodiment can achieve thirteen functions through the switching of pipelines and valves, including conventional cooling, complete cold storage, simultaneous cooling and cold storage, subcooling release, condensation release, parallel release, conventional heating, complete heat storage, simultaneous heating and heat storage, mixed heat release, independent heat release, discontinuous heating defrosting, and continuous heating defrosting. This broadens the application range of the energy storage system and improves its availability. It also alleviates the problems of energy storage air conditioners having limited functions (mostly only for defrosting), not being able to continuously heat during defrosting, and having limited available time.

[0214] The following sections describe the thirteen operating modes of an air conditioning system.

[0215] In some embodiments, the operating modes of the air conditioning system include a first operating mode - conventional cooling mode; in the conventional 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.

[0216] In some embodiments, the operating mode of the air conditioning system includes a second operating mode - 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 energy storage unit 201 is used as an evaporator.

[0217] In some embodiments, the air conditioning system operates in a third mode – simultaneous cooling and heat storage mode. In the simultaneous cooling and heat 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 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.

[0218] In some embodiments, the air conditioning system operates in a fourth mode – subcooling release mode. In subcooling release 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.

[0219] In some embodiments, the air conditioning system operates in a fifth operating mode – condensation and cooling release mode. In condensation and cooling release mode, the first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the second 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.

[0220] In some embodiments, the air conditioning system operates in a sixth operating mode – parallel cooling release mode. In the parallel cooling release 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 condenser, and the indoor heat exchanger 7 is used as an evaporator.

[0221] In some embodiments, the air conditioning system operates in a seventh mode – a conventional heating mode. In the conventional 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 in operation, and the indoor heat exchanger 7 is used as a condenser.

[0222] In some embodiments, the air conditioning system operates in an eighth 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 second 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.

[0223] In some embodiments, the air conditioning system has nine operating modes, including a heat storage and simultaneous heating mode. In the heat storage and simultaneous 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.

[0224] In some embodiments, the air conditioning system operates in a tenth mode – a mixed heat release mode. In the mixed heat release 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.

[0225] In some embodiments, the air conditioning system operates in an eleventh mode – independent heat release mode. In independent heat release 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.

[0226] In some embodiments, the air conditioning system operates in a twelfth 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.

[0227] In some embodiments, the air conditioning system operates in a thirteenth operating mode – continuous heating and defrosting mode. In continuous heating and defrosting 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.

[0228] The following is in conjunction with the appendix Figures 1 to 14 The piping and valve connections of the first embodiment of the air conditioning system are described in detail.

[0229] refer to Figure 1 The entire air conditioning system includes outdoor unit 1, energy storage unit 2, and indoor unit.

[0230] 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.

[0231] 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.

[0232] 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 gas side main pipe 4.

[0233] 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.

[0234] 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.

[0235] 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 first gas pipe 203, and the gas-liquid separator 108.

[0236] The subcooled expansion valve 106 connects the first flow path and the second flow path.

[0237] 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 first gas pipe 203. The outlet of the gas-liquid separator 108 is connected to the inlet of the compressor 101.

[0238] 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.

[0239] The first port 201a of the accumulator 201 is connected to the outlet of the compressor 101 through the second 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.

[0240] 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.

[0241] 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 second 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.

[0242] 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.

[0243] The accumulator 201 can be used as an evaporator, condenser or subcooler.

[0244] The air conditioning system provided in this embodiment can achieve thirteen functions, including conventional cooling, complete cold storage, simultaneous cooling and cold storage, subcooling release, condensation release, parallel release, conventional heating, complete heat storage, simultaneous heating and heat storage, mixed heat release, independent heat release, discontinuous heating defrosting, and continuous heating defrosting, through the switching of pipelines and valves.

[0245] The control methods for the first regulating valve 102, the second regulating valve 103, the high-pressure valve 208, the heat release valve 210, the cold release valve 212, the bypass valve 211, the outdoor expansion valve 105, and the energy storage expansion valve 206 corresponding to the thirteen operating modes of the air conditioning system are shown in Table 1.

[0246] Table 1

[0247]

[0248]

[0249] The following is combined with Figures 2 to 14 This document describes in detail the thirteen operating modes of an air conditioning system.

[0250] refer to Figure 2 First working mode - conventional cooling:

[0251] The first regulating valve 102 and the second regulating valve 103 are both in the second valve position. The bypass valve 211 is open, the outdoor expansion valve 105 is open, and the energy storage expansion valve 206, cold release valve 212, high-pressure gas valve 208, and heat release valve 210 are all closed. The indoor heat exchanger 7 acts as an evaporator, the outdoor heat exchanger 104 acts as a condenser, and the energy storage accumulator 201 is closed. The refrigerant discharged from the compressor 101 enters the outdoor heat exchanger 104 via the first regulating valve 102, condenses, and then enters the indoor heat exchanger 7 through the liquid-side main pipe 3. After evaporation in the indoor heat exchanger 7, it enters the gas-liquid separator 108 via the gas-side main pipe 4 and the second regulating valve 103, and then enters the suction side of the compressor 101. At this time, the energy storage accumulator 201 is not used; only the conventional refrigeration cycle function is achieved.

[0252] refer to Figure 3 Second operating mode - complete cold storage:

[0253] Both the first regulating valve 102 and the second regulating valve 103 are in the second valve position. The outdoor expansion valve 105, the heat release valve 210, and the energy storage expansion valve 206 are open, while the cold release valve 212, the high-pressure gas valve 208, and the bypass valve 211 are closed. The indoor heat exchanger 7 is closed; the outdoor heat exchanger 104 acts as a condenser, and the energy storage valve 201 acts as an evaporator. The refrigerant discharged from the compressor 101 flows through the first regulating valve 102 into the outdoor heat exchanger 104 for condensation. It then passes through the liquid-side main pipe 3 and the energy storage expansion valve 206, and enters the energy storage 201 through the first port 201a. After evaporating in the energy storage 201, it enters the gas-liquid separator 108 through the first gas pipe 203, and then enters the suction side of the compressor 101 after passing through the gas-liquid separator 108. With the indoor heat exchanger 7 closed, the refrigerant does not flow through the indoor heat exchanger 7 but evaporates in the energy storage 201, storing the cooling capacity in the energy storage 201. Two-phase refrigerant enters the accumulator 201 from the first port 201a via the distributor 214, while gaseous refrigerant is discharged from the second port 201b of the accumulator 201.

[0254] refer to Figure 4 Third working mode - simultaneous cold storage and cooling:

[0255] Both the first regulating valve 102 and the second regulating valve 103 are in the second valve position. The outdoor expansion valve 105, heat release valve 210, bypass valve 211, and energy storage expansion valve 206 are open, while the cold release valve 212 and high-pressure gas valve 208 are closed. The indoor heat exchanger 7 acts as an evaporator, the outdoor heat exchanger 104 acts as a condenser, and the energy storage tank 201 acts as an evaporator. The refrigerant discharged from the compressor 101 flows through the first regulating valve 102 into the outdoor heat exchanger 104, where it is condensed. Then, it is divided into two paths through the liquid-side main pipe 3. One path flows through the energy storage expansion valve 206 into the energy storage tank 201, where it evaporates and flows into the first gas pipe 203. The other path flows into the indoor heat exchanger 7, where it evaporates and flows into the gas-side main pipe 4. The two paths converge at the inlet of the gas-liquid separator 108 and return to the suction side of the compressor 101 after passing through the gas-liquid separator 108. At this time, the energy storage tank 201 and the indoor heat exchanger 7 both act as evaporators. The energy storage tank 201 stores cold, while the indoor heat exchanger 7 provides cooling. Two-phase refrigerant enters accumulator 201 from the first port 201a via liquid separator 214, while gaseous refrigerant is discharged from the second port 201b of accumulator 201.

[0256] refer to Figure 5 Fourth working mode - supercooled release:

[0257] Both the first regulating valve 102 and the second regulating valve 103 are in the second valve position. The outdoor expansion valve 105 and the cold release valve 212 are open, while the energy storage expansion valve 206, the high-pressure gas valve 208, the heat release valve 210, and the bypass valve 211 are closed. The indoor heat exchanger 7 acts as an evaporator, the outdoor heat exchanger 104 acts as a condenser, and the energy accumulator 201 acts as a subcooler. The refrigerant discharged from the compressor 101 flows through the first regulating valve 102 into the outdoor heat exchanger 104, where it is condensed. Then, it enters the energy accumulator 201 through the liquid-side main pipe 3 and the second liquid pipe 205 for subcooling. After subcooling, it enters the liquid-side main pipe 3 through the third liquid pipe 213. After evaporation in the indoor heat exchanger 7, it returns to the suction side of the compressor 101 through the gas-side main pipe 4, the second regulating valve 103, and the gas-liquid separator 108. At this time, the energy accumulator 201 acts as a subcooler, releasing its stored cold energy to the refrigerant, further increasing its subcooling degree and improving the refrigerant's cooling capacity. Liquid refrigerant enters the accumulator 201 through the second port 201b and, after being subcooled in the accumulator 201, flows out through the first port 201a of the accumulator 201.

[0258] refer to Figure 6 Fifth operating mode - condensation and heat release:

[0259] The first regulating valve 102 is in the first position, the second regulating valve 103 is in the second position, the outdoor expansion valve 105, the energy storage expansion valve 206, the heat release valve 210, and the bypass valve 211 are closed, and the high-pressure gas valve 208 and the cold release valve 212 are open. The indoor heat exchanger 7 acts as an evaporator, the outdoor heat exchanger 104 is closed, and the energy storage tank 201 acts as a condenser. The refrigerant discharged from the compressor 101 flows into the energy storage tank 201 through the second gas pipe 202, the high-pressure gas valve 208, the second liquid flow pipe 205, the cold release valve 212, and the second port 201b of the energy storage tank 201 for condensation. Then, it enters the liquid side main pipe 3 through the first port 201a of the energy storage tank 201 and the third liquid pipe 213. After evaporation in the indoor heat exchanger 7, it returns to the suction side of the compressor 101 through the gas side main pipe 4, the second regulating valve 103, and the gas-liquid separator 108. Instead of using the outdoor heat exchanger 104, the accumulator 201 is used as a condenser to provide cooling capacity for the refrigeration cycle. Because the temperature of the cold storage material in the accumulator 201 is much lower than the outdoor ambient temperature, the refrigeration cycle can operate under low pressure ratio conditions, significantly reducing the load on the compressor 101. Gaseous refrigerant enters the accumulator 201 from its second port 201b, and the condensed liquid refrigerant is discharged from its first port 201a.

[0260] refer to Figure 7 The sixth working mode - parallel cooling:

[0261] Both the first regulating valve 102 and the second regulating valve 103 are in the second valve position. The energy storage expansion valve 206 and the heat release valve 210 are closed, while the outdoor expansion valve 105, the high-pressure gas valve 208, the cold release valve 212, and the bypass valve 211 are open. The indoor heat exchanger 7 acts as an evaporator, the outdoor heat exchanger 104 acts as a condenser, and the energy storage unit 201 acts as a condenser.

[0262] The refrigerant discharged from compressor 101 is divided into two paths. The first path enters accumulator 201 through the second gas pipe 202, the second liquid pipe 205, and the second port 201b of accumulator 201 for condensation. Then, it enters the liquid-side main pipe 3 through the first port 201a and the third liquid pipe 213 of accumulator 201. The second path enters outdoor heat exchanger 104 through the first regulating valve 102 for condensation. After merging with the first path through the liquid-side main pipe 3, it evaporates in indoor heat exchanger 7 and then returns to the suction side of compressor 101 through the gas-side main pipe 4, the second regulating valve 103, and the gas-liquid separator 108. At this time, outdoor heat exchanger 104 and accumulator 201 are used simultaneously as condensers to provide cooling capacity for the refrigeration cycle and improve condensation capacity. Gaseous refrigerant enters accumulator 201 from the second port 201b, and after condensation, liquid refrigerant is discharged from the first port 201a of accumulator 201.

[0263] refer to Figure 8 Seventh working mode - conventional heating:

[0264] The first regulating valve 102 and the second regulating valve 103 are both in the first valve position. The bypass valve 211 is open, the outdoor expansion valve 105 is open, and the energy storage expansion valve 206, the cold release valve 212, the high-pressure gas valve 208, and the heat release valve 210 are closed. The indoor heat exchanger 7 acts as a condenser, the outdoor heat exchanger 104 acts as an evaporator, and the energy storage device 201 is closed.

[0265] The refrigerant discharged from compressor 101 enters the gas-side main pipe 4 through the second regulating valve 103, flows into the indoor heat exchanger 7 for condensation, and then flows into the outdoor heat exchanger 104 for evaporation after being throttled by the outdoor expansion valve 105 through the liquid-side main pipe 3. Finally, it returns to the suction side of compressor 101 through the first regulating valve 102 and the gas-liquid separator 108. At this time, the accumulator 201 is not used, and only the conventional heating cycle is used.

[0266] refer to Figure 9 Eighth operating mode - complete heat storage:

[0267] The first regulating valve 102 is in the first valve position, the second regulating valve 103 is in the second valve position, the high-pressure gas valve 208, the cold release valve 212, and the bypass valve 211 are open, the outdoor expansion valve 105 is open, and the energy storage expansion valve 206 and the heat release valve 210 are closed. The indoor heat exchanger 7 is closed, the outdoor heat exchanger 104 acts as an evaporator, and the energy storage unit 201 acts as a condenser.

[0268] The refrigerant discharged from compressor 101 flows through the second gas pipe 202, the second liquid pipe 205, and the second port 201b of accumulator 201 into accumulator 201 for condensation. Then, it flows through the first port 201a of accumulator 201 and the third liquid pipe 213 into the liquid-side main pipe 3. It then flows into the outdoor expansion valve 105 for throttling, evaporates in the outdoor heat exchanger 104, and returns to the suction side of compressor 101 via the first regulating valve 102 and the gas-liquid separator 108. During this process, the refrigerant condenses in accumulator 201, storing heat, and evaporates in outdoor heat exchanger 104. Gaseous refrigerant enters accumulator 201 from the second port 201b, and after condensation, liquid refrigerant flows out from the first port 201a of accumulator 201.

[0269] refer to Figure 10 Ninth working mode - simultaneous heat storage and heating:

[0270] Both the first regulating valve 102 and the second regulating valve 103 are in the first valve position. The high-pressure gas valve 208, the cold release valve 212, and the bypass valve 211 are open. The outdoor expansion valve 105 is open, and the energy storage expansion valve 206 and the heat release valve 210 are closed. The indoor heat exchanger 7 acts as a condenser, the outdoor heat exchanger 104 acts as an evaporator, and the energy storage unit 201 acts as a condenser.

[0271] The refrigerant discharged from compressor 101 is divided into two paths. One path flows through the second gas pipe 202, the second liquid pipe 205, and the second port 201b of accumulator 201 into accumulator 201 for condensation. Then, it flows through the first port 201a of accumulator 201 and the third liquid pipe 213 into the liquid-side main pipe 3. The other path flows through the second regulating valve 103 into indoor heat exchanger 7. After condensation, it enters the liquid-side main pipe 3 and merges with the first path of refrigerant. Then, it flows through the bypass valve 211 into outdoor expansion valve 105 for throttling and evaporates in outdoor heat exchanger 104. Finally, it returns to the suction side of compressor 101 through the first regulating valve 102 and gas-liquid separator 108. At this time, accumulator 201 and indoor heat exchanger 7 act as condensers, storing heat while generating heat, while outdoor heat exchanger 104 acts as an evaporator. Gaseous refrigerant enters accumulator 201 from the second port 201b, and after condensation, liquid refrigerant flows out from the first port 201a of accumulator 201.

[0272] refer to Figure 11 The tenth operating mode - mixed heat release:

[0273] Both the first regulating valve 102 and the second regulating valve 103 are in the first valve position. The heat release valve 210 and the bypass valve 211 are open. The outdoor expansion valve 105 and the energy storage expansion valve 206 are both open. The cold release valve 212 and the high-pressure gas valve 208 are both closed. The indoor heat exchanger 7 acts as a condenser, the outdoor heat exchanger 104 acts as an evaporator, and the energy storage device 201 acts as an evaporator.

[0274] The refrigerant discharged from compressor 101 flows into indoor heat exchanger 7 for condensation via second regulating valve 103 and gas-side main pipe 4. Then, the refrigerant enters liquid-side main pipe 3 and is split after passing through bypass valve 211. One path flows through first liquid pipe 204, is throttled by energy storage expansion valve 206, and enters energy storage 201 through first port 201a. After evaporation in energy storage 201, it flows into first gas pipe 203 through second port 201b of energy storage 201. The other path flows through liquid-side main pipe 3, is throttled by outdoor expansion valve 105, and flows into outdoor heat exchanger 104 for evaporation. The two refrigerant paths converge at the inlet section of gas-liquid separator 108 and return to the suction side of compressor 101. At this time, energy storage 201 undertakes part of the evaporation load, increasing the suction pressure. Two-phase refrigerant enters accumulator 201 from the first port 201a via liquid separator 214, and gaseous refrigerant flows out from the second port 201b of accumulator 201 after evaporation.

[0275] refer to Figure 12 Eleventh Operating Mode - Independent Heat Release:

[0276] Both the first regulating valve 102 and the second regulating valve 103 are in the first valve position. The heat release valve 210 and the bypass valve 211 are open, the energy storage expansion valve 206 is open, and the outdoor expansion valve 105, the cold release valve 212, and the high-pressure gas valve 208 are all closed. The indoor heat exchanger 7 acts as a condenser, the outdoor heat exchanger 104 is closed, and the energy storage unit 201 acts as an evaporator.

[0277] The refrigerant discharged from compressor 101 flows into indoor heat exchanger 7 for condensation via second regulating valve 103 and gas-side main pipe 4. Then, the refrigerant enters liquid-side main pipe 3, flows through first liquid pipe 204, is throttled by energy storage expansion valve 206, enters energy storage 201 through first port 201a for evaporation, then enters first gas pipe 203 through second port 201b of energy storage 201, flows into gas-liquid separator 108, and finally returns to the suction side of compressor 101. At this time, energy storage 201 bears the entire evaporation load. Two-phase refrigerant enters energy storage 201 from first port 201a via liquid separator 214, and the evaporated gaseous refrigerant flows out from second port 201b of energy storage 201.

[0278] refer to Figure 13 The twelfth operating mode - discontinuous heating defrosting:

[0279] The first regulating valve 102 and the second regulating valve 103 are both in the second valve position. The cold release valve 212, the high-pressure gas valve 208, and the bypass valve 211 are all closed. The energy storage expansion valve 206 is open, and the outdoor expansion valve 105 and the heat release valve 210 are open. The indoor heat exchanger 7 is closed, the outdoor heat exchanger 104 acts as a condenser, and the energy storage unit 201 acts as an evaporator.

[0280] The refrigerant discharged from compressor 101 flows through the first regulating valve 102 into the outdoor heat exchanger 104 for condensation, then enters the first liquid pipe 204 through the liquid-side main pipe 3, flows through the energy storage expansion valve 206 for throttling, and enters the energy storage 201 through the first port 201a. After evaporating in the energy storage 201, it enters the first gas pipe 203 through the second port 201b of the energy storage 201, and then returns to the suction side of compressor 101 through the gas-liquid separator 108. The refrigerant does not evaporate in the indoor heat exchanger 7, but evaporates in the energy storage 201, using the stored heat to defrost the outdoor heat exchanger 104. The two-phase refrigerant enters the energy storage 201 from the first port 201a through the liquid separator 214, and the evaporated gaseous refrigerant flows out from the second port 201b of the energy storage 201.

[0281] refer to Figure 14 Thirteenth working mode - continuous heating and defrosting:

[0282] The first regulating valve 102 is in the second valve position, the second regulating valve 103 is in the first valve position, the cold release valve 212 and the high-pressure gas valve 208 are both closed, the energy storage expansion valve 206 is open, and the outdoor expansion valve 105, the heat release valve 210, and the bypass valve 211 are open. The indoor heat exchanger 7 acts as a condenser, the outdoor heat exchanger 104 acts as a condenser, and the energy storage unit 201 acts as an evaporator.

[0283] The refrigerant discharged from compressor 101 is split into two streams. One stream flows through the second regulating valve 103 and the gas-side main pipe 4 into the indoor heat exchanger 7 for condensation, and then flows into the liquid-side main pipe 3. The other stream flows through the first regulating valve 102 into the outdoor heat exchanger 104 for condensation. It then merges with the first stream of refrigerant through the liquid-side main pipe 3 and enters the first liquid pipe 204. It flows through the energy storage expansion valve 206 for throttling and enters the energy storage 201 through the first port 201a. After evaporation, it flows out from the second port 201b of the energy storage 201 and returns to the suction side of compressor 101 through the first gas pipe 203 and the gas-liquid separator 108. At this time, the refrigerant condenses in both the indoor heat exchanger 7 and the outdoor heat exchanger 104 and evaporates in the energy storage 201, providing heating and defrosting simultaneously. Two-phase refrigerant enters accumulator 201 from the first port 201a via liquid separator 214, and the evaporated gaseous refrigerant flows out from the second port 201b of accumulator 201.

[0284] The following is in conjunction with the appendix Figure 15 The piping and valve connections of the second embodiment of the air conditioning system are described in detail.

[0285] refer to Figure 15 The difference between the second embodiment of the air conditioning system and the first embodiment of the air conditioning system is that the second air pipe 202.

[0286] In the first embodiment of the air conditioning system: the first end of the second gas pipe 202 is connected to the outlet of the compressor 101, the second end of the second gas pipe 202 is connected to the first liquid pipe 204, and the connection between the second end of the second 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 provided on the second gas pipe 202.

[0287] In a second embodiment of the air conditioning system: the first end of the second gas pipe 202 is connected to the gas-side main pipe 4, the second end of the second gas pipe 202 is connected to the first liquid pipe 204, and the connection between the second end of the second 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. The high-pressure gas valve 208 is located on the second gas pipe 202.

[0288] The second embodiment of the air conditioning system differs from the first embodiment in that the original second gas pipe 202, which was connected to the outlet of the compressor 101, is instead connected to the gas-side main pipe 4.

[0289] 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.

[0290] The following is in conjunction with the appendix Figures 16 to 18 The piping and valve connections of the third embodiment of the air conditioning system are described in detail.

[0291] refer to Figure 16 The 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.

[0292] The storage container 220 has a first interface 220a, a second interface 220b, and a third interface 220c. Both 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 an inlet valve 221. The second interface 220b is connected to the second gas pipe 202 via a pressurization valve 222. The second interface 220b is also connected to the first gas pipe 203 via a third throttling device 225 and a gas balance valve 224. The third interface 220c is connected to the first gas pipe 203 via a third throttling device 225 and a drain valve 223.

[0293] 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.).

[0294] 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.

[0295] refer to Figure 17 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.

[0296] refer to Figure 18When 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.

[0297] The following is in conjunction with the appendix Figures 19 to 21 The pipe and valve connections of the fourth embodiment of the air conditioning system are described in detail.

[0298] refer to Figure 19 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.

[0299] The storage container 220 has a first interface 220a' and a second interface 220c'. The first interface 220a' is located below the second interface 220c'. The first interface 220a' is connected to the liquid-side main pipe 3 through a gas balance valve 224, and the second interface 220c' is connected to the first gas pipe 203 through a drain valve 223 and a third throttling device 225.

[0300] 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.).

[0301] When the storage container 220 is not in operation, both the drain valve 223 and the gas balance valve 224 are closed.

[0302] refer to Figure 20 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 first interface 220a', and flows out of the storage container 220 through the drain valve 223.

[0303] refer to Figure 21 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.

[0304] The air conditioning system provided in this embodiment is a multi-functional energy storage air conditioning system based on a heat pump, which utilizes the energy storage system to achieve thirteen functions such as cold storage and cold release.

[0305] The air conditioning system provided in this embodiment integrates multiple functions through a relatively simple pipeline design, broadening the application scenarios of energy storage and enabling more full realization of the value of energy storage.

[0306] The air conditioning system provided in this embodiment utilizes an energy storage device to store energy during off-peak electricity price periods and release energy during peak electricity price periods, thereby reducing the system's power consumption at these times.

[0307] The air conditioning system provided in this embodiment, in cooling mode, can utilize a condensation-release function when there is a need to significantly reduce power consumption in a short period of time. This means the accumulator is used alone as the condenser for the cooling cycle. Since the temperature of the energy storage material in the accumulator after storing cold energy is much lower than the outdoor ambient temperature, the compressor does not need to provide excessive pressure, allowing the system to operate under low compression ratio conditions, greatly reducing energy consumption. Simultaneously, the heat conduction between the low-temperature energy storage material and the refrigerant replaces the air-cooled heat exchange of the outdoor heat exchanger, improving heat exchange efficiency.

[0308] The air conditioning system provided in this embodiment is capable of continuous heating while defrosting.

[0309] The air conditioning system provided in this embodiment uses a bidirectional refrigerant inlet method to ensure uniform liquid distribution when liquid refrigerant enters the accumulator, and also to reduce pressure loss when gaseous refrigerant enters the accumulator.

[0310] The air conditioning system provided in this embodiment can provide uninterrupted heating, can provide energy storage and release services for various different power load transfer scenarios, and can provide continuous heating while defrosting.

[0311] Some embodiments also provide a control device for an air conditioning system, including:

[0312] The memory is configured to store instructions;

[0313] 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.

[0314] 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.

[0315] 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", "energy storage valve", etc.

[0316] 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.

[0317] 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); Indoor heat exchanger (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 outdoor heat exchanger (104), the accumulator (201), and the compressor (101); 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 indoor heat exchanger (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; Also 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 indoor heat exchanger (7). The gas-side main pipe (4) is connected at one end to the second regulating valve (103) and at the other end to the other end of the indoor heat exchanger (7); and The first air pipe (203) is connected at one end to the second port (201b) of the accumulator (201) and at the other end to the inlet of the compressor (101); 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 and a second end connected to the second port (201b) of the accumulator (201); 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 first gas pipe (203) and the inlet of the compressor (101) respectively; the fourth valve port of the first regulating valve (102) is connected to the first gas pipe (203) 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 first gas pipe (203) 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 first gas pipe (203) and the inlet of the compressor (101) respectively; the fourth valve port of the second regulating valve (103) is connected to the gas side main 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 first gas pipe (203), 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 second gas pipe (202) has its first end connected to the gas-side main pipe (4) and its second end connected to the first liquid pipe (204). The connection between the second end of the second 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 second air pipe (202).

9. The air conditioning system according to claim 1, characterized in that, Also includes: The second gas pipe (202) has its first end connected to the outlet of the compressor (101) and its second end connected to the first liquid pipe (204). The connection between the second end of the second 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 second 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 is located between the second end of the second 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 second air pipe (202); the pressurization valve (222) is located on the pipe connecting the second port (220b) and the second air pipe (202); The second interface (220b) of the storage container (220) is also connected to the first air pipe (203); the air balance valve (224) is located on the pipe connecting the second interface (220b) and the first air pipe (203); The third port (220c) of the storage container (220) is connected to the first air pipe (203); the drain valve (223) is located on the pipe connecting the third port (220c) and the first air pipe (203); The connection point between the third interface (220c) and the first air pipe (203) is closer to the inlet of the compressor (101) than the connection point between the second interface (220b) and the first air pipe (203). The two third throttling devices (225) are respectively located on the pipeline connecting the third interface (220c) and the first air pipe (203), and on the pipeline connecting the second interface (220b) and the first air pipe (203).

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 first interface (220a') and a second 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 gas balance valve (224) is located on the pipeline connecting the first port (220a') and the liquid-side main pipe (3); The second port (220c') of the storage container (220) is connected to the first air pipe (203); the drain valve (223) is located on the pipe connecting the second port (220c') and the first air pipe (203); The third throttling device (225) is located on the pipeline connecting the second interface (220c') and the first air pipe (203).

13. The air conditioning system according to claim 1, characterized in that, Also includes: A heat release valve (210) is provided, through which the second port (201b) of the accumulator (201) is connected to the first gas pipe (203).

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. A control method for an air conditioning system according to any one of claims 1 to 14, 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.

16. The control method for an air conditioning system according to claim 15, 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.

17. The control method for an air conditioning system according to claim 15, characterized in that, The working modes of the air conditioning system include a conventional cooling mode; in the conventional 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.

18. The control method for an air conditioning system according to claim 15, 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.

19. The control method for an air conditioning system according to claim 15, characterized in that, The working modes of the air conditioning system include a cold storage and cooling mode; in the cold storage and 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 device (201) is used as an evaporator, and the indoor heat exchanger (7) is also used as an evaporator.

20. The control method for an air conditioning system according to claim 15, characterized in that, The working modes of the air conditioning system include subcooling and heat release mode; in subcooling and heat release 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 accumulator (201) is used as a subcooler, and the indoor heat exchanger (7) is used as an evaporator.

21. The control method for an air conditioning system according to claim 15, characterized in that, The working modes of the air conditioning system include condensation and cooling release mode; in condensation and cooling release mode, the first regulating valve (102) is located in the first valve position, the second regulating valve (103) is located in the second 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.

22. The control method for an air conditioning system according to claim 15, characterized in that, The working modes of the air conditioning system include parallel cooling mode; in parallel 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 accumulator (201) is used as a condenser, and the indoor heat exchanger (7) is used as an evaporator.

23. The control method for an air conditioning system according to claim 15, characterized in that, The working modes of the air conditioning system include a conventional heating mode; in the conventional 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.

24. The control method for an air conditioning system according to claim 15, 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 second 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.

25. The control method for an air conditioning system according to claim 15, characterized in that, The working modes of the air conditioning system include a heat storage and heating mode; in the heat storage and 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.

26. The control method for an air conditioning system according to claim 15, characterized in that, The working mode of the air conditioning system includes a mixed heat release mode; in the mixed heat release 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 accumulator (201) is used as an evaporator, and the indoor heat exchanger (7) is used as a condenser.

27. The control method for an air conditioning system according to claim 15, characterized in that, The working modes of the air conditioning system include independent heat release mode; in independent heat release 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.

28. The control method for an air conditioning system according to claim 15, 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.

29. The control method for an air conditioning system according to claim 15, characterized in that, The working modes of the air conditioning system include continuous heating and defrosting mode; in continuous heating and defrosting 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 an evaporator, and the indoor heat exchanger (7) is used as a condenser.

30. 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 15 to 29.

31. 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 15 to 29.

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