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

Abstract

The present application discloses an air-conditioning system and a control method, a control device, and a computer-readable storage medium. The air-conditioning system includes a compressor, an outdoor heat exchanger, a liquid-side main pipe, a gas-side main pipe, an indoor heat exchanger, a four-way valve, an accumulator, and a control valve assembly. The accumulator has a first port and a second port. The first port is connected to the outdoor heat exchanger and the liquid-side main pipe, respectively, and the second port is connected to the suction port of the compressor, the outdoor heat exchanger, and the exhaust port of the compressor, respectively. The four-way valve and the control valve assembly operate to control the flow direction of the refrigerant and the on-off of the connecting pipes to adjust the working status of the accumulator, the outdoor heat exchanger, and the indoor heat exchanger and enable the air-conditioning system to switch between different working modes. In the first working state of the accumulator, the refrigerant enters the accumulator from the first port and flows out through the second port; in the second working state, the refrigerant enters the accumulator from the second port and flows out through the first port. The air-conditioning system of the present application meets the diverse needs of users.

Description

Technical Field

[0001] The present application relates to an air conditioning system and a control method, a control device, and a computer-readable storage medium thereof. Background Art

[0002] In order to alleviate the discomfort caused by hot weather, people usually use air conditioning systems to lower the indoor temperature and improve the indoor temperature comfort.

[0003] At present, although the structures of refrigeration machines are diverse and some air-conditioning units also use cold storage modules, the working mode of the cold storage modules is relatively simple and cannot meet diverse needs. Summary of the Invention

[0004] The present application provides an air-conditioning system and its control method, control device, and computer-readable storage medium to meet more needs of users.

[0005] In a first aspect, the present application provides an air-conditioning system, comprising a compressor, an outdoor heat exchanger, a liquid side main pipe, a gas side main pipe, an indoor heat exchanger, a four-way valve, an accumulator and a control valve assembly, wherein the indoor heat exchanger is connected to the liquid side main pipe and the gas side main pipe; the four-way valve has a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected to the exhaust port of the compressor, the second valve port is connected to the outdoor heat exchanger, the third valve port is connected to the intake port of the compressor, and the fourth valve port is connected to the gas side main pipe; the accumulator has a first port and a second port, the first port is connected to the outdoor heat exchanger and the liquid side main pipe in a switchable manner, respectively, and the second port is connected to the intake port of the compressor, the outdoor heat exchanger and the exhaust port of the compressor in a switchable manner, respectively. The four-way valve and the control valve assembly operate to adjust the working states of the accumulator, the outdoor heat exchanger and the indoor heat exchanger and switch the air-conditioning system between different working modes. The accumulator has a first working state and a second working state. In the first working state, the refrigerant enters the accumulator from the first port and flows out through the second port; in the second working state, the refrigerant enters the accumulator from the second port and flows out through the first port.

[0006] In some embodiments, a liquid separation device is provided at the first port, and the refrigerant enters the accumulator through the liquid separation device.

[0007] In some embodiments, the air conditioning system includes a first pipe and a second pipe, the first pipe is connected to the exhaust port of the compressor, the first end of the second pipe is connected to the first port of the accumulator, the second end of the second pipe is connected to the outdoor heat exchanger, the second pipe is connected to the first pipe at a first connection point, the first pipe can be set to be on and off, and the second pipe can be set to be on and off.

[0008] In some embodiments, the control valve assembly includes a first control valve disposed on a first pipe, and the first control valve is configured to control the opening and closing of the first pipe.

[0009] In some embodiments, the control valve assembly includes an accumulator restriction element disposed between the first connection point of the second tube and the first end thereof.

[0010] In some embodiments, the control valve assembly includes a second control valve disposed between the first connection point of the second pipe and the second end thereof, and the second control valve is configured to control the on-off state of the pipeline.

[0011] In some embodiments, the second port is connected to the second pipe through a third pipe, the second pipe and the third pipe are connected at a second connection point, and the second control valve is disposed between the second connection point and the second end of the second pipe.

[0012] In some embodiments, the control valve assembly further includes a third control valve disposed on the third pipe, and the third control valve is configured to control the on-off of the third pipe.

[0013] In some embodiments, the control valve assembly further includes a throttling element connected in parallel to both ends of the third control valve, and the opening of the throttling element is adjustable.

[0014] In some embodiments, the air conditioning system further includes a fourth pipe, the first port is connected to the liquid side main pipe through the fourth pipe, and the fourth pipe can be set to be on and off.

[0015] In some embodiments, the control valve assembly further includes a fourth control valve disposed on the fourth pipe, and the fourth control valve is used to control the on-off of the fourth pipe.

[0016] In some embodiments, the air conditioning system includes a second pipe and a bypass pipe, the first end of the second pipe is connected to the first port, the second end of the second pipe is connected to the outdoor heat exchanger, and the fourth pipe is connected to the second end of the second pipe through the bypass pipe. The control valve assembly also includes a bypass valve arranged on the bypass pipe, and the bypass valve is used to control the opening and closing of the bypass pipe.

[0017] In some embodiments, the air conditioning system further includes a fifth pipe, the control valve assembly further includes a fifth control valve arranged on the fifth pipe, the second port is connected to the suction port of the compressor through the fifth pipe, and the fifth control valve is configured to control the on and off of the fifth pipe.

[0018] In some embodiments, the air conditioning system includes a first pipe, a second pipe, a third pipe, a fourth pipe, a fifth pipe and a bypass pipe, the control valve assembly includes a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, a bypass valve, an energy storage throttling element and an outdoor throttling element connected to the exhaust port of the compressor, the first control valve is arranged on the first pipe and is configured to control the on and off of the first pipe, the first end of the second pipe is connected to the first port, the second end of the second pipe is connected to the outdoor heat exchanger, the second pipe is connected to the first pipe at a first connection point, the energy storage throttling element is arranged between the first connection point and the first end of the second pipe, and the second control valve is arranged between the first connection point and the first end of the second pipe. Between the second ends of the two pipes and configured to control the on-off of the pipeline, the third control valve is arranged on the third pipe and configured to control the on-off of the third pipe, the first port is connected to the liquid side main pipe through the fourth pipe, the fourth control valve is arranged on the fourth pipe and configured to control the on-off of the fourth pipe, the fourth pipe is connected to the second end of the second pipe through the bypass pipe, the bypass valve is arranged on the bypass pipe and configured to control the on-off of the bypass pipe, the second port is connected to the suction port of the compressor through the fifth pipe, the fifth control valve is arranged on the fifth pipe and configured to control the on-off of the fifth pipe, the first end of the outdoor heat exchanger is connected to the second valve port of the four-way valve, and the second end of the outdoor heat exchanger is connected to the outdoor throttling element.

[0019] In some embodiments, the air conditioning system includes a first pipe and a second pipe, the first pipe is connected to the fourth valve port of the four-way valve, and the first port is connected to the first pipe through the second pipe.

[0020] In some embodiments, the air-conditioning system also includes a liquid storage tank, which has a first interface and a second interface. The first interface is connected to the liquid side main pipe, and the second interface is connected to the suction port of the compressor. The liquid storage tank has a closed state, a refrigerant storage state, and a refrigerant release state.

[0021] In some embodiments, the air-conditioning system further includes a gas balancing valve arranged between the first interface and the outdoor heat exchanger and a drain valve arranged between the second interface and the air intake of the compressor. In the closed state, the gas balancing valve and the drain valve are both closed; in the refrigerant storage state, the gas balancing valve and the drain valve are both open; in the refrigerant release state, the gas balancing valve is closed and the drain valve is open.

[0022] The second aspect of the present application provides a control method based on the above air conditioning system,

[0023] Determine the operating mode of the air conditioning system;

[0024] According to the preset control strategy and based on the working mode, the four-way valve and the control valve assembly are controlled to adjust the status of the outdoor heat exchanger, the indoor heat exchanger and the accumulator.

[0025] In some embodiments, controlling the four-way valve and the control valve assembly according to a preset control strategy and based on the working mode to adjust the states of the outdoor heat exchanger, the indoor heat exchanger, and the accumulator includes:

[0026] During periods of low electricity prices in the power supply system, the four-way valve and the control valve assembly are controlled based on the working mode to enable the accumulator to store energy;

[0027] During periods of high electricity prices in the power supply system, the four-way valve and the control valve assembly are controlled based on the working mode to release energy from the accumulator.

[0028] In some embodiments, the operating modes of the air-conditioning system include conventional cooling, full cold storage, cold storage and cooling, supercooling release, condensation release, parallel cold release, conventional heating, full heat storage, heat storage and heating, mixed heat release, independent heat release and defrosting.

[0029] A third aspect of the present application provides a control method based on the above-mentioned air-conditioning system, comprising:

[0030] Determine the operating mode of the air conditioning system;

[0031] According to the preset control strategy and based on the working mode, the actions of the four-way valve, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the bypass valve, the accumulator throttling element and the outdoor throttling element are controlled to change the states of the outdoor heat exchanger, the indoor heat exchanger and the accumulator.

[0032] In some embodiments, when the working mode is the conventional cooling mode, the four-way valve is controlled to be powered off, the bypass valve and the outdoor throttling element are opened, and the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve and the energy storage throttling element are closed;

[0033] Among them, the outdoor heat exchanger is used as a condenser, the indoor heat exchanger is used as an evaporator, and the accumulator is not working.

[0034] In some embodiments, when the working mode is the full cold storage mode, the four-way valve is controlled to be powered off, the fifth control valve, the second control valve, the outdoor throttling element, and the energy storage throttling element are opened, and the bypass valve, the first control valve, the fourth control valve, and the third control valve are closed;

[0035] The outdoor heat exchanger is used as a condenser, the accumulator is used as an evaporator, and the refrigerant enters from a first port of the accumulator and flows out from a second port of the accumulator.

[0036] In some embodiments, when the working mode is the cooling and cold storage mode, the four-way valve is controlled to be powered off, the bypass valve, the second control valve, the fifth control valve, the outdoor throttling element and the energy storage throttling element are controlled to be open, and the first control valve and the third control valve are controlled to be closed;

[0037] The outdoor heat exchanger is used as a condenser, the accumulator and the indoor heat exchanger are used as evaporators at the same time, and the refrigerant enters from the first port of the accumulator and flows out from the second port of the accumulator.

[0038] In some embodiments, when the working mode is the supercooling release mode, the four-way valve is controlled to be powered off, the outdoor throttling element, the second control valve, the third control valve and the fourth control valve are controlled to be open, and the bypass valve, the fifth control valve, the first control valve and the energy storage throttling element are controlled to be closed;

[0039] The outdoor heat exchanger is used as a condenser, the accumulator is used as a subcooler, and the refrigerant enters from the second port of the accumulator and flows out from the first port of the accumulator.

[0040] In some embodiments, when the working mode is the condensation and cooling mode, the four-way valve is controlled to be powered off, the first control valve, the third control valve, and the fourth control valve are controlled to be open, and the bypass valve, the fifth control valve, the outdoor throttling element, and the energy storage throttling element are controlled to be closed;

[0041] The outdoor heat exchanger does not work, the accumulator serves as a condenser, and the refrigerant enters from the second port of the accumulator and flows out from the first port of the accumulator.

[0042] In some embodiments, when the working mode is the parallel cooling mode, the four-way valve is controlled to be powered off, the outdoor throttling element, the bypass valve, the third control valve, the fourth control valve and the first control valve are controlled to be open, and the energy storage throttling element, the second control valve and the fifth control valve are controlled to be closed;

[0043] The outdoor heat exchanger is used as a condenser, the accumulator is used as a condenser, and the refrigerant enters from the second port of the accumulator and flows out from the first port of the accumulator.

[0044] In some embodiments, when the working mode is the conventional heating mode, the four-way valve is energized, the bypass valve and the outdoor throttling element are opened, and the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve and the energy storage throttling element are closed;

[0045] The outdoor heat exchanger is used as an evaporator and the accumulator is not working.

[0046] In some embodiments, when the operating mode is the full heat storage mode, the four-way valve is controlled to be energized, the bypass valve, the first control valve, the third control valve, the fourth control valve and the outdoor throttling element are opened, and the energy storage throttling element, the second control valve and the fifth control valve are closed;

[0047] The accumulator serves as a condenser, the outdoor heat exchanger serves as an evaporator, and the refrigerant enters from the second port of the accumulator and flows out from the first port of the accumulator.

[0048] In some embodiments, when the working mode is the heating and heat storage mode, the four-way valve is controlled to be energized, the bypass valve, the first control valve, the third control valve, the fourth control valve and the outdoor throttling element are opened, and the second control valve, the fifth control valve and the energy storage throttling element are closed;

[0049] The accumulator serves as a condenser, the outdoor heat exchanger serves as an evaporator, and the refrigerant enters from the second port of the accumulator and flows out from the first port of the accumulator.

[0050] In some embodiments, when the working mode is the mixed heat release mode, the four-way valve is energized, the fifth control valve, the energy storage throttling element, the outdoor throttling element and the bypass valve are opened, and the first control valve, the third control valve and the fourth control valve are closed;

[0051] The accumulator and the outdoor heat exchanger serve as evaporators at the same time, the indoor heat exchanger serves as a condenser, and the refrigerant enters from the first port of the accumulator and flows out from the second port of the accumulator.

[0052] In some embodiments, when the working mode is the independent heat release mode, the four-way valve is energized, the fifth control valve, the bypass valve, the second control valve, and the energy storage throttling element are opened, and the first control valve, the outdoor throttling element, the third control valve, and the fourth control valve are closed;

[0053] The outdoor heat exchanger does not work, the accumulator serves as an evaporator, the indoor heat exchanger serves as a condenser, and the refrigerant enters from a first port of the accumulator and flows out from a second port of the accumulator.

[0054] In some embodiments,

[0055] When the working mode is the defrost mode, the four-way valve is controlled to be powered off, the second control valve, the fifth control valve, the outdoor throttling element and the energy storage throttling element are opened, and the bypass valve, the first control valve and the third control valve are closed;

[0056] The indoor heat exchanger does not work, the accumulator serves as an evaporator, the indoor heat exchanger serves as a condenser, and the refrigerant enters from a first port of the accumulator and flows out from a second port of the accumulator.

[0057] A fourth aspect of the present application provides a control device for an air conditioning system, comprising:

[0058] a memory configured to store instructions;

[0059] The processor is coupled to the memory, and is configured to execute and implement the above control method based on instructions stored in the memory.

[0060] A fifth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the above-mentioned control method is implemented.

[0061] Based on the various aspects provided in this application, the air-conditioning system can change the flow direction of the refrigerant and / or the on-off state of the connecting pipes by operating the four-way valve and the control valve assembly to adjust the state of the outdoor heat exchanger, the indoor heat exchanger and the accumulator, wherein the accumulator has a first working state and a second working state. In the first working state, the refrigerant enters from the first port and flows out from the second port. In the second working state, the refrigerant enters from the second port and flows out from the first port. In this way, the air-conditioning system of this embodiment can switch between different working modes, thereby meeting the diverse needs of users and improving the user experience.

[0062] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0064] Figure 1 This is a structural diagram of an air-conditioning system according to an embodiment of the present application.

[0065] Figure 2 for Figure 1 The diagram shows a refrigerant flow path diagram when the air-conditioning system is in normal cooling mode.

[0066] Figure 3 for Figure 1 The figure shows a schematic diagram of the refrigerant flow path when the air-conditioning system is in full cold storage mode.

[0067] Figure 4 for Figure 1 The diagram shows a refrigerant flow path diagram of the air-conditioning system when it is in cooling and cold storage mode.

[0068] Figure 5 for Figure 1 The diagram shows a refrigerant flow path diagram of the air-conditioning system when it is in supercooling release mode.

[0069] Figure 6 for Figure 1 The diagram shows the refrigerant flow path when the air-conditioning system is in condensing cooling mode.

[0070] Figure 7 for Figure 1 The diagram shows the refrigerant flow path of the air-conditioning system when it is in parallel cooling mode.

[0071] Figure 8 for Figure 1The diagram shows a refrigerant flow path diagram when the air-conditioning system is in conventional heating mode.

[0072] Figure 9 for Figure 1 The diagram shows the refrigerant flow path when the air conditioning system is in full thermal storage mode.

[0073] Figure 10 for Figure 1 The diagram shows a refrigerant flow path diagram of the air-conditioning system when it is in heating and heat storage mode.

[0074] Figure 11 for Figure 1 The diagram shows a refrigerant flow path diagram of the air-conditioning system when it is in mixed heat release mode.

[0075] Figure 12 for Figure 1 The diagram shows the refrigerant flow path when the air-conditioning system is in independent heat release mode.

[0076] Figure 13 for Figure 1 The diagram shows the refrigerant flow path when the air-conditioning system is in defrost mode.

[0077] Figure 14 This is a structural schematic diagram of an air-conditioning system according to a first alternative embodiment of the present application.

[0078] Figure 15 This is a structural diagram of an air-conditioning system according to a second alternative embodiment of the present application.

[0079] Figure 16 This is a structural schematic diagram of an air-conditioning system according to a third alternative embodiment of the present application.

[0080] Figure 17 This is a structural schematic diagram of an air-conditioning system according to a fourth alternative embodiment of the present application.

[0081] Figure 18 This is a structural diagram of an air-conditioning system according to a fifth alternative embodiment of the present application.

[0082] Figure 19 for Figure 18 Schematic diagram of the liquid storage tank in the refrigerant storage state.

[0083] Figure 20 for Figure 18 Schematic diagram of the liquid storage tank in the refrigerant release state.

[0084] Figure 21 This is a structural schematic diagram of an air-conditioning system according to the sixth alternative embodiment of the present application.

[0085] Figure 22 for Figure 21Schematic diagram of the liquid storage tank in the refrigerant storage state.

[0086] Figure 23 for Figure 21 Schematic diagram of the liquid storage tank in the refrigerant release state.

[0087] Figure 24 This is a schematic structural diagram of the accumulator according to an embodiment of the present application. DETAILED DESCRIPTION

[0088] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0089] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0090] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be subsequently positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used herein are interpreted accordingly.

[0091] refer to Figure 1 The air conditioning system of the embodiment of the present application includes a compressor 101, an outdoor heat exchanger 105, a liquid side main pipe 3, a gas side main pipe 4, an indoor heat exchanger, a four-way valve 104, an accumulator 201 and a control valve assembly.

[0092] The indoor heat exchanger is connected to the liquid main pipe 3 and the gas main pipe 4. The four-way valve 104 has a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port is connected to the exhaust port of the compressor 101, the second valve port is connected to the outdoor heat exchanger 105, the third valve port is connected to the intake port of the compressor 101, and the fourth valve port is connected to the gas main pipe 4.

[0093] The accumulator 201 has a first port 201a and a second port 201b. The first port 201a is connected to the outdoor heat exchanger 105 and the liquid-side header 3, respectively, and the second port 201b is connected to the intake port of the compressor 101, the outdoor heat exchanger 105, and the exhaust port of the compressor 101, respectively.

[0094] The four-way valve 104 and the control valve assembly operate to adjust the operating conditions of the accumulator 201, the outdoor heat exchanger 105, and the indoor heat exchanger, switching the air conditioning system between different operating modes. The accumulator 201 has a first operating state and a second operating state. In the first operating state, refrigerant enters the accumulator 201 through the first port 201a and exits through the second port 201b. In the second operating state, refrigerant enters the accumulator 201 through the second port 201b and exits through the first port 201b.

[0095] The air-conditioning system of the embodiment of the present application can change the flow direction of the refrigerant and / or the on-off state of the connecting pipes by operating the four-way valve 104 and the control valve assembly to adjust the states of the outdoor heat exchanger 105, the indoor heat exchanger and the accumulator 201, wherein the accumulator 201 has a first working state and a second working state. In the first working state, the refrigerant enters from the first port 201a and flows out from the second port 201b. In the second working state, the refrigerant enters from the second port 201b and flows out from the first port 201a. In this way, the air-conditioning system of this embodiment can switch between different working modes, thereby meeting the diverse needs of users and improving the user experience.

[0096] The accumulator 201 is filled with energy storage material and is equipped with a refrigerant pipeline. The refrigerant flows through the pipeline, exchanging heat with the energy storage material to store or release energy. In this embodiment, the four-way valve 104 switches the air conditioning system between cooling and heating modes. In cooling mode, the accumulator can store and release cold air. In heating mode, the accumulator can store and release heat.

[0097] The structure of the accumulator 201 is as follows: Figure 24 As shown, the accumulator 201 includes an energy storage tank 2011 and a refrigerant coil 2012 disposed within the energy storage tank 2011. The refrigerant coil 2012 has a first port 201a and a second port 201b. The air conditioning system of the present embodiment, through the operation of the four-way valve 104 and the control valve assembly, allows refrigerant to enter through both the first end 201a and the second end 201b, achieving bidirectional refrigerant flow into the accumulator 201. Specifically, the refrigerant flows in opposite directions within the accumulator during cold storage and release. Specifically, during cold storage, the refrigerant's temperature gradually increases along the process. Therefore, at the end of cold storage, the temperature of the energy storage material in the accumulator also follows a distribution pattern from low to high. During cold release, the high-temperature refrigerant flows into the accumulator from the other end, in the opposite direction. At this point, as heat exchange with the energy storage material, whose temperature distribution shifts from high to low, is achieved, the resulting heat exchange is more efficient, resulting in a lower refrigerant temperature and better performance.

[0098] The four-way valve 104 has a first valve port, a second valve port, a third valve port, and a fourth valve port. When the four-way valve 104 is powered off, the first valve port and the second valve port are connected, and the third valve port and the fourth valve port are connected. When the four-way valve 104 is powered on, the first valve port and the fourth valve port are connected, and the second valve port and the third valve port are connected.

[0099] In some embodiments, reference Figure 1 A liquid separator 214 is provided at the first port 201a. The refrigerant enters the accumulator 201 through the liquid separator 214. The provision of the liquid separator 214 at the first port 201a ensures uniform liquid separation of the liquid refrigerant upon entry into the accumulator. Furthermore, the accumulator of this embodiment enables bidirectional refrigerant inflow, allowing the gaseous refrigerant to enter the accumulator from the second port 201b, which is not provided with a liquid separator, thereby reducing pressure loss when the gaseous refrigerant enters the accumulator.

[0100] In some embodiments, the air conditioning system includes a first pipe 202 and a second pipe 204. The first pipe 202 is connected to the exhaust port of the compressor 101. The first end of the second pipe 204 is connected to the first port of the accumulator 201, and the second end of the second pipe 204 is connected to the outdoor heat exchanger 105. The second pipe 204 is connected to the first pipe 202 at a first connection point. The first pipe 202 can be set to be on and off, and the second pipe 204 can be set to be on and off. In this way, the high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor 101 can flow to the second port 201b through the first pipe 202 and the second pipe 204, and then enter the accumulator 201 from the second port 201b, so that the accumulator of the present application can achieve a heat storage function. Moreover, the gaseous refrigerant enters the accumulator 201 from the second port 201b to avoid the pressure loss caused by entering through the first port 201a.

[0101] In some embodiments, the control valve assembly includes a first control valve 208 disposed on the first tube 202. The first control valve 208 is configured to control the opening and closing of the first tube 202. When the second port 201b does not need to be supplied with gaseous refrigerant, the first control valve 208 can be controlled to be closed; when the second port 201b needs to be supplied with gaseous refrigerant, the first control valve 208 can be controlled to be opened.

[0102] In some embodiments, a first end of the second tube 204 is connected to the first port 201a, and a second end of the second tube 204 is connected to the outdoor heat exchanger 105. The second tube 204 is connected to the first tube 202 at a first connection point, and the control valve assembly includes an energy storage throttling element 206 disposed between the first connection point and the first end of the second tube 204. Through the energy storage throttling element 206, the refrigerant flowing out of the outdoor heat exchanger 105 can be pressure-changed by the energy storage throttling element 206 before entering the accumulator 201.

[0103] In some embodiments, the first end of the second tube 204 is connected to the first port 201a, and the second end of the second tube 204 is connected to the outdoor heat exchanger 105. The second tube 204 is connected to the first tube 202 at a first connection point. The control valve assembly includes a second control valve 207 disposed between the first connection point and the second end of the second tube 204. The second control valve 207 is configured to control the on / off state of the pipeline. The configuration of the second control valve 207 controls whether the refrigerant flowing out of the outdoor heat exchanger 105 passes through the second tube 204 and the accumulator throttling element 206 to enter the accumulator 201. For example, when the second control valve 207 is open, the refrigerant flowing out of the outdoor heat exchanger 105 can enter the accumulator 201 through the second tube 204 and flow out of the second port 201b of the accumulator 201 back to the compressor. In this case, the accumulator can function as an evaporator to achieve a full cold storage mode, or the accumulator and the indoor heat exchanger can function as evaporators to achieve a cooling and cold storage mode.

[0104] Specifically, the second control valve 207 can be as follows Figure 1 The one-way valve shown in FIG. 2 is connected to the outdoor heat exchanger 105 at the inlet of the one-way valve and the outlet of the one-way valve is connected to the first connection point. The second control valve 207 can also be connected to the outdoor heat exchanger 105 at the inlet of the one-way valve and the outlet of the one-way valve. Figure 15 The solenoid valve shown is an on-off valve, which can more accurately control the on-off between the second end of the second tube 204 and the first connection point.

[0105] In some embodiments, the second port 201b is connected to the second pipe 204 via a third pipe 205. The second pipe 204 and the third pipe 205 are connected at a second connection point, and the second control valve 207 is disposed between the second connection point and the second end of the second pipe 204. In this way, the refrigerant flowing out of the outdoor heat exchanger 105 can reach the second port 201b of the accumulator through the second pipe 204 and the third pipe 205, and then enter the accumulator 201 through the second port 201b. At this time, the accumulator 201 can function as a subcooler, releasing cold energy from the refrigerant condensed in the outdoor heat exchanger 105, further increasing its subcooling degree before flowing into the indoor heat exchanger for evaporation, thereby increasing the cooling capacity of the refrigerant. At this time, the air conditioning system enters a subcooling release mode.

[0106] In some embodiments, the control valve assembly further includes a third control valve 212 disposed on the third pipe 205. The third control valve 212 is configured to control the on-off of the third pipe 205. The third control valve 212 may be a solenoid valve, thereby facilitating control by the controller.

[0107] refer to Figure 16 In some embodiments, the control valve assembly further includes a throttle element 215 connected in parallel to both ends of the third control valve 212. The opening of the throttle element 215 is adjustable. The throttle element 215 may be an electronic expansion valve. When in the heat storage and heating mode or the parallel cooling mode, the opening of the throttle element 215 can be adjusted to distribute the refrigerant flow to the accumulator and the indoor heat exchanger.

[0108] In some embodiments, the air conditioning system further includes a fourth pipe 213, through which the first port 201a is connected to the liquid-side main pipe 3. The fourth pipe 213 connects the first port 201a and the liquid-side main pipe 3, so that when the refrigerant enters through the second port 201b, it can flow out of the first port 201a and into the indoor heat exchanger through the liquid-side main pipe 3.

[0109] In some embodiments, the control valve assembly further includes a fourth control valve 209 provided on the fourth pipe 213, and the fourth control valve 209 is used to control the on-off of the fourth pipe 213. The fourth control valve 209 can be a one-way valve or a solenoid valve. Figure 1 As shown, the fourth control valve 209 is a one-way valve, the inlet of the one-way valve is connected to the first port 201a, and the outlet of the one-way valve is connected to the liquid side main pipe 3. Figure 14 As shown, the fourth control valve 209 is a solenoid valve, which is an on-off valve to better control the on-off of the fourth pipe 213 .

[0110] In some embodiments, the air conditioning system includes a second pipe 204 and a bypass pipe. The first end of the second pipe 204 is connected to the first port 201a, the second end of the second pipe 204 is connected to the outdoor heat exchanger 105, and the fourth pipe 213 is connected to the second end of the second pipe 204 via the bypass pipe. The control valve assembly also includes a bypass valve 211 disposed on the bypass pipe, and the bypass valve 211 is used to control the on-off of the bypass pipe. When the bypass valve 211 is open, the refrigerant flowing out of the outdoor heat exchanger 105 can flow to the liquid side main pipe 3 through the bypass pipe and enter the indoor heat exchanger, thereby achieving a conventional cooling mode. When the bypass valve 211 is disconnected, the refrigerant flowing out of the outdoor heat exchanger 105 cannot flow to the indoor side through the bypass valve 211. At this time, it can enter the accumulator through the second pipe 204 to achieve complete cold storage. When the bypass valve 211 is open and the second control valve 207 is open, the refrigerant flowing out of the outdoor heat exchanger 105 can enter the indoor side through the bypass pipe, and can also enter the accumulator through the second pipe 204 to achieve cold storage and cooling at the same time.

[0111] In some embodiments, the air conditioning system further includes a fifth pipe 203. The control valve assembly further includes a fifth control valve 210 disposed on the fifth pipe. The second port 201b is connected to the air intake of the compressor 101 through the fifth pipe 203. The fifth control valve 210 is configured to control the on / off of the fifth pipe 203. The fifth pipe 203 realizes the connection between the second port 201b of the accumulator 201 and the air intake of the compressor 101. Figure 3 As shown, the refrigerant flowing out of the indoor heat exchanger 105 enters the accumulator 201 and flows out from the second port 201b thereof, and then directly flows back to the suction port of the compressor 101 through the fifth pipe, thereby achieving the following Figure 3 The full cold storage mode shown, and Figure 4 The cold storage and cooling mode shown in FIG. 3 can further realize the following Figure 11 Mixed heat release mode as shown Figure 12 The independent heat release mode shown and Figure 13 Defrost mode shown.

[0112] In some embodiments, as Figure 1As shown, the air conditioning system includes a first pipe 202, a second pipe 204, a third pipe 205, a fourth pipe 213, a fifth pipe and a bypass pipe, and the control valve assembly includes a first control valve 208, a second control valve 207, a third control valve 212, a fourth control valve 209, a fifth control valve 210, a bypass valve 211, an energy storage throttling element 206 and an outdoor throttling element 106. The first pipe 202 is connected to the exhaust port of the compressor 101, the first control valve 208 is arranged on the first pipe 202 and is configured to control the on and off of the first pipe 202, the first end of the second pipe 204 is connected to the first port 201a, the second end of the second pipe 204 is connected to the outdoor heat exchanger 105, the second pipe 204 is connected to the first connection point with the first pipe 202, the energy storage throttling element 206 is arranged between the first connection point and the first end of the second pipe 204, and the second control valve 207 is set It is located between the first connection point and the second end of the second pipe 204 and is configured to control the on-off of the pipeline. The third control valve 212 is arranged on the third pipe 205 and is configured to control the on-off of the third pipe 205. The first port 201a is connected to the liquid side main pipe 3 through the fourth pipe 213. The fourth control valve 209 is arranged on the fourth pipe 213 and is configured to control the on-off of the fourth pipe 213. The fourth pipe 213 is connected to the second end of the second pipe 204 through a bypass pipe. The bypass valve 211 is arranged on the bypass pipe and is configured to control the on-off of the bypass pipe. The second port 201b is connected to the suction port of the compressor 101 through the fifth pipe. The fifth control valve 210 is arranged on the fifth pipe and is configured to control the on-off of the fifth pipe. The first end of the outdoor heat exchanger 105 is connected to the second valve port of the four-way valve 104, and the second end of the outdoor heat exchanger 105 is connected to the outdoor throttling element 106.

[0113] The throttling element in each embodiment of the present application may be an electronic expansion valve.

[0114] The air conditioning system of this embodiment can switch between twelve modes by controlling the actions of the above four-way valve 104 and the above control valves. The control method of each mode is described in detail below.

[0115] In this embodiment, the operating modes of the air-conditioning system include conventional cooling, complete cold storage, cold storage and cooling, supercooling release, condensation release, parallel cold release, conventional heating, complete heat storage, heat storage and heating, mixed heat release, independent heat release and defrosting.

[0116] Specifically, for the twelve modes, the actions of each valve are as follows:

[0117]

[0118]

[0119] The following is based on Figures 2 to 13Combined with the above table, the working process of the twelve modes of the air-conditioning system is explained in detail.

[0120] like Figure 2 As shown, when the air conditioning system is in normal cooling mode,

[0121] Four-way valve 104 is de-energized, bypass valve 211 and outdoor throttling element 106 are open, and first control valve 208, second control valve 207, third control valve 212, fifth control valve 210, fourth control valve 209, and accumulator throttling element 206 are closed. Refrigerant discharged from the exhaust port of compressor 101 flows through outdoor heat exchanger 105 and the bypass pipe, then enters the indoor unit through liquid header 3. After evaporation in the indoor unit, it returns to the intake port of compressor 101 through gas header 4 and gas-liquid separator 102. At this point, accumulator 201 is inoperative, and only the normal refrigeration cycle is functioning.

[0122] like Figure 3 As shown in Figure 2, when the air conditioning system is in full cold storage mode,

[0123] The four-way valve 104 is de-energized, the second control valve 207, the fifth control valve 210, the accumulator throttling element 206, and the outdoor throttling element 106 are open, and the bypass valve 211, the first control valve 208, the third control valve 212, and the fourth control valve 209 are closed. The refrigerant discharged from the compressor 101, after condensing in the outdoor heat exchanger 105, passes through the first liquid pipe 204 and is throttled at the accumulator throttling element 206. It then enters the accumulator 201 for evaporation and then returns to the gas-liquid separator 102 and the suction side of the compressor 101 through the fifth pipe 203. In this mode, the accumulator 201 acts as an evaporator, the outdoor heat exchanger 105 acts as a condenser, and the indoor heat exchanger is inoperative. At this time, the two-phase refrigerant enters the accumulator 201 from the first end 201a through the liquid separator 214. After evaporation, the gaseous refrigerant flows out from the second end 201b of the accumulator 201.

[0124] like Figure 4 As shown in Figure 2, when the air conditioning system is in cooling and cold storage mode,

[0125] Four-way valve 104 is de-energized. Bypass valve 211, second control valve 207, fifth control valve 210, and accumulator throttling element 206 are open, as is outdoor throttling element 106. First control valve 208, third control valve 212, and fourth control valve 209 are closed. Refrigerant discharged from compressor 101 is condensed in outdoor heat exchanger 105 and splits into two paths. One path enters liquid manifold 3, evaporates, and then returns to the compressor suction side through gas manifold 4. The other path enters accumulator 201 through second pipe 204 and accumulator throttling element 206, evaporates, and then flows into fifth pipe 203, returning to the compressor 101 suction side. In this mode, accumulator 201 and the indoor heat exchanger simultaneously function as evaporators, with accumulator 201 storing cold and the indoor heat exchanger providing cooling to the room. At this time, the two-phase refrigerant enters the accumulator 201 from the first end 201 a through the liquid separator 214 , and the gaseous refrigerant flows out from the second end 201 b of the accumulator 201 after evaporation.

[0126] like Figure 5 As shown, when the air conditioning system is in supercooling release mode,

[0127] The four-way valve 104 is de-energized. The outdoor throttle element 106, second control valve 207, fourth control valve 209, and third control valve 212 are open, while the bypass valve 211, fifth control valve 210, first control valve 208, and accumulator throttle element 206 are closed. The refrigerant discharged from the compressor 101 flows through the outdoor heat exchanger 105, passes through the second pipe 204 and the third pipe 205, and enters the accumulator 201 through the second port 201b. After being subcooled, it flows through the fourth pipe 213 and the liquid-side manifold 3 and into the indoor heat exchanger for evaporation. After evaporation, the refrigerant returns to the suction side of the compressor 101 through the gas-side manifold 4 and the gas-liquid separator 102. In this mode, the accumulator 201 acts as a subcooler, releasing cooling energy to the refrigerant condensed in the outdoor heat exchanger 105. This further increases the subcooling degree before it flows into the indoor unit for evaporation, thereby increasing the refrigerant's cooling capacity. At this time, the liquid refrigerant enters the accumulator 201 from the second end 201 b , and after being supercooled, the liquid refrigerant flows out from the first end 201 a through the liquid separation device 214 .

[0128] like Figure 6 As shown, when the air conditioning system is in condensing cooling mode,

[0129] The four-way valve 104 is de-energized. The first, third, and fourth control valves 208, 212, and 209 are open, while the outdoor throttle element 106, bypass valve 211, accumulator throttle element 206, second control valve 207, and fifth control valve 210 are closed. The refrigerant discharged from the compressor 101 enters the accumulator 201 through the first, second, and third pipes 202, 204, and 205 for condensation. It then flows through the fourth pipe 213 and the liquid-side manifold 3 into the indoor unit for evaporation. The evaporated refrigerant then returns to the suction side of the compressor 101 through the gas-side manifold 4 and the gas-liquid separator 102. This mode does not utilize the outdoor heat exchanger 105, but instead uses the accumulator 201 as a condenser to provide cooling for the refrigeration cycle. Because the temperature of the cold storage material in the accumulator 201 is significantly lower than the outdoor ambient temperature, the refrigeration cycle can operate at a low pressure ratio, significantly reducing the load on the compressor 101. At this time, the gaseous refrigerant enters the accumulator 201 from the second end 201 b , and the liquid refrigerant flows out from the first end 201 a through the liquid separator 214 after condensation.

[0130] When there's a need to significantly reduce power consumption in a short period of time, the condensing cooling function can be used. This means using the accumulator alone as the outdoor heat exchanger, rather than the outdoor heat exchanger, rather than the outdoor heat exchanger. Because the temperature of the stored cold energy in the accumulator is low, significantly lower than the outdoor ambient temperature, the compressor doesn't need to provide excessive pressure, allowing the system to operate at a low compression ratio, significantly reducing system energy consumption. Furthermore, 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.

[0131] like Figure 7 As shown, when the air conditioning system is in parallel cooling mode,

[0132] The four-way valve 104 is de-energized. The outdoor throttle element 106, bypass valve 211, first control valve 208, third control valve 212, and fourth control valve 209 are open, while the accumulator throttle element 206, second control valve 207, and fifth control valve 210 are closed. The refrigerant discharged from the compressor 101 is split into two paths. The first path enters the accumulator 201 through the first pipe 202, second pipe 204, and third pipe 205 for condensation, then flows through the fourth pipe 213 into the liquid-side manifold 3. The other path condenses in the outdoor heat exchanger 105, reunites with the first path through the liquid-side manifold 3, and flows into the indoor unit for evaporation. After evaporation, the refrigerant returns to the suction side of the compressor 101 through the gas-side manifold 4 and the gas-liquid separator 102. In this mode, the outdoor heat exchanger 105 and accumulator 201 both act as condensers, and the indoor unit acts as an evaporator. At this time, the gaseous refrigerant enters the accumulator 201 from the second end 201 b , and the liquid refrigerant flows out from the first end 201 a through the liquid separator 214 after condensation.

[0133] like Figure 8 As shown, when the air conditioning system is in normal heating mode,

[0134] Four-way valve 104 is energized. Bypass valve 211 opens, outdoor throttling element 106 opens, and first control valve 208, second control valve 207, fourth control valve 209, fifth control valve 210, third control valve 212, and accumulator throttling element 206 close. Refrigerant discharged from compressor 101 flows through gas header 4 into the indoor unit. After condensation, it enters outdoor heat exchanger 105 through liquid header 3 for evaporation, then returns to the suction side of compressor 101 through gas-liquid separator 102. At this point, accumulator 201 is not used, and only the conventional heating cycle is implemented.

[0135] like Figure 9 As shown, when the air conditioning system is in full heat storage mode,

[0136] The four-way valve 104 is energized. The outdoor throttling element 106, bypass valve 211, first control valve 208, third control valve 212, and fourth control valve 209 are opened, while the accumulator throttling element 206, second control valve 207, and fifth control valve 210 are closed. The refrigerant discharged from the compressor 101 enters the accumulator 201 through the first pipe 202, second pipe 204, and third pipe 205 for condensation, flows out from the fourth pipe 213 and enters the liquid-side main pipe 3, flows into the outdoor heat exchanger 105 for evaporation, and after evaporation, returns to the gas-liquid separator 102 and the suction side of the compressor 101. In this mode, the accumulator 201 acts as a condenser and the outdoor heat exchanger 105 acts as an evaporator. At this time, the gaseous refrigerant enters the accumulator 201 through the second end 201b, and the condensed liquid refrigerant flows out from the first end 201a of the accumulator 201.

[0137] like Figure 10 As shown, when the air conditioning system is in the heating and heat storage mode,

[0138] Four-way valve 104 is energized. Bypass valve 211, first control valve 208, third control valve 212, and fourth control valve 209 are open. Fifth control valve 210 and accumulator throttle element 206 are closed, and outdoor throttle element 106 is open. Refrigerant discharged from compressor 101 flows through first pipe 202 and third pipe 205 into accumulator 201 for condensation, then enters liquid-side manifold 3 through fourth pipe 213. The other refrigerant flows through gas-side manifold 4 into the indoor unit for condensation, then enters liquid-side manifold 3 to merge with the first refrigerant flow. The refrigerant then enters outdoor heat exchanger 105 for evaporation, then returns to the suction side of compressor 101 through gas-liquid separator 102. The accumulator 201 and indoor heat exchanger function simultaneously as condensers, with the accumulator 201 storing heat and the indoor heat exchanger providing heat to the indoor environment. At this time, the gaseous refrigerant enters the accumulator 201 from the second end 201 b and the liquid refrigerant flows out from the first end 201 a of the accumulator 201 after condensation.

[0139] like Figure 11 As shown, when the air conditioning system is in mixed heat release mode,

[0140] Four-way valve 104 is energized. Fifth control valve 210, bypass valve 211, second control valve 207, and accumulator throttle element 206 are open. First control valve 208, third control valve 212, and fourth control valve 209 are closed, and outdoor throttle element 106 is open. Refrigerant discharged from compressor 101 enters the indoor unit through gas-side manifold 4 for condensation, then enters liquid-side manifold 3 where it splits into two paths. One path passes through second manifold 204, where it is throttled at accumulator throttle element 206, before entering accumulator 201 for evaporation and exiting through fifth manifold 203. The other path passes through liquid-side manifold 3 and enters outdoor heat exchanger 105 for evaporation. It then merges with the first path at the inlet of gas-liquid separator 102 and returns to the suction side of compressor 101. The accumulator 201 and outdoor heat exchanger 105 function as evaporators, improving evaporation capacity, while the indoor unit functions as a condenser. At this time, the two-phase refrigerant enters the accumulator 201 from the first end 201a, and the gaseous refrigerant flows out from the second end 201b after evaporation.

[0141] like Figure 12 As shown, when the air conditioning system is in independent heat release mode,

[0142] The four-way valve 104 is energized. The fifth control valve 210, second control valve 207, and bypass valve 211 are opened, the first control valve 208, outdoor throttling element 106, and third control valve 212 are closed, and the accumulator throttling element 206 is opened. The refrigerant discharged from the compressor 101 enters the indoor unit from the gas-side main pipe 4 for condensation, then enters the liquid-side main pipe 3. After throttling at the accumulator throttling element 206 through the second pipe 204, it enters the accumulator 201 for evaporation, is discharged to the gas-liquid separator 102 through the fifth pipe 203, and returns to the suction side of the compressor 101. The accumulator 201 acts as an evaporator, and the indoor unit acts as a condenser. At this time, the two-phase refrigerant enters the accumulator 201 from the first end 201a, and the evaporated gaseous refrigerant flows out from the second end 201b.

[0143] like Figure 13 As shown in the figure, when the air conditioning system is in defrost mode,

[0144] The four-way valve 104 loses power. The fifth control valve 210 and the outdoor throttling element 106 are opened, the bypass valve 211, the first control valve 208 and the third control valve 212 are closed, and the accumulator throttling element 206 is opened. The refrigerant discharged from the compressor 101 enters the liquid side main pipe 3 after condensation in the outdoor heat exchanger 105, passes through the first pipe 204, is throttled at the accumulator throttling element 206, enters the accumulator 201 for evaporation, and then returns to the gas-liquid separator 102 and the suction side of the compressor 101 through the fifth pipe 203. In this mode, the accumulator 201 acts as an evaporator and the outdoor heat exchanger 105 acts as a condenser. At this time, the two-phase refrigerant enters from the first end 201a of the accumulator 201 through the liquid separator 214, and the evaporated gaseous refrigerant flows out from the second end 201b of the accumulator 201.

[0145] In summary, the air conditioning system of this embodiment can utilize the accumulator to store energy during both cooling and heating. Therefore, when electricity prices are low, the accumulator stores energy; when electricity prices are at their peak, the accumulator is used to release cooling or heat, providing energy to the system, reducing the operating frequency of the compressor, lowering power consumption, and lowering operating costs. When the accumulator is used for defrosting, it can bear the system's evaporation load. Compared to reverse cycle defrosting in air conditioners without energy storage, which uses an indoor heat exchanger as the evaporator and an outdoor heat exchanger as the condenser, it does not require heat absorption from the room, helping to maintain indoor comfort. Overall, this multifunctional energy storage air conditioning system can effectively reduce operating costs for a variety of application scenarios.

[0146] refer to Figure 17 In some embodiments, the air conditioning system includes a first pipe 202 and a second pipe 204. The first pipe 202 is connected to the fourth valve port of the four-way valve 104. The second pipe 204 is connected to the first port 201a and the second port 201b of the accumulator 201 and is connected to the first pipe 202. Figure 1 Compared with the embodiment shown, conventional cooling, complete cold storage, cold storage and cooling, supercooling and cold release, as well as conventional heating, complete heat storage, heat storage and heating, mixed heat release, independent heat release and defrosting modes can be realized.

[0147] refer to Figures 18 to 23 In some embodiments, the air conditioning system further includes a liquid storage tank 220. The liquid storage tank 220 has a first interface and a second interface. The first interface is connected to the liquid side main pipe 3, and the second interface is connected to the air intake of the compressor 101. The liquid storage tank 220 has a closed state, a refrigerant storage state, and a refrigerant release state. The liquid storage tank 220 is used to store and release refrigerant, and control the refrigerant amount in different operating modes, so that the system circulating refrigerant amount is consistent with the refrigerant demand in different operating modes, achieving the best heat exchange effect.

[0148] In some embodiments, the air-conditioning system further includes a gas balancing valve 224 arranged between the first interface and the outdoor heat exchanger 105 and a drain valve 223 arranged between the second interface and the air intake of the compressor 101. In the closed state, the gas balancing valve 224 and the drain valve 223 are both closed; in the refrigerant storage state, the gas balancing valve 224 and the drain valve 223 are both open; in the refrigerant release state, the gas balancing valve 224 is closed and the drain valve 223 is open.

[0149] Specifically, if Figure 18 As shown, in this embodiment, the liquid storage tank 220 has three interfaces, including a first inlet 220a, a second inlet 220b, and an outlet 220c. The first inlet 220a is connected to the liquid side main pipe 3 through a liquid inlet valve 221, the second inlet 220b is connected to the first pipe 202 through a pressurizing valve 222, and is connected to the fifth pipe 203 through a capillary tube 225 and a gas balance valve 224, and the outlet 220c is connected to the fifth pipe 203 through a capillary tube 225 and a liquid drain valve 223.

[0150] like Figure 19 and Figure 20 As shown, liquid storage tank 220 has three states: inoperative, storing refrigerant, and releasing refrigerant. All three states can be used in different system modes, such as conventional cooling and full cold storage. When inoperative, the liquid inlet valve 221, pressurizing valve 222, drain valve 223, and gas balance valve 224 are all closed. When it is determined that the current operating mode requires refrigerant storage, the liquid inlet valve 221 and gas balance valve 224 are opened, while the pressurizing valve 222 and drain valve 223 are closed. The gas balance valve 224 is opened, placing the pressure of the liquid storage tank 220 at a low pressure. The liquid inlet valve 221 is opened, placing the refrigerant inlet pipe of the liquid storage tank 220 at a medium pressure, and refrigerant enters the refrigerant tank 220 due to the pressure difference. When it is determined that the current operating mode requires the refrigerant tank to release refrigerant, the liquid inlet valve 221 and gas balance valve 224 are closed, while the pressurizing valve 222 and drain valve 223 are opened. The drain valve 223 is opened, so that the outlet end of the liquid storage tank 220 is in a low-pressure state, and the pressurizing valve 222 is opened, so that the tank pressure of the liquid storage tank 220 is in a high-pressure state. The refrigerant inside the tank is discharged from the tank under the action of gravity and pressure difference and enters the pipeline circulation.

[0151] like Figure 21 As shown, this embodiment provides another type of liquid storage tank with only two interfaces, including an inlet 220a and an outlet 220c. The inlet 220a is connected to the liquid side main pipe 3 through a gas balance valve 224, and the outlet 220c is connected to the fifth pipe 203 through a drain valve 223 and a capillary tube 225.

[0152] like Figure 22 and Figure 23As shown, the liquid storage tank 220 has three states: not working, storing refrigerant and releasing refrigerant. These three states can be used in different system modes such as conventional refrigeration and full cold storage. When not working, the drain valve 223 and the gas balance valve 224 are both closed. When it is determined that the current operating mode needs to start storing refrigerant, the drain valve 223 and the gas balance valve 224 are both opened, and the refrigerant enters the refrigerant tank 220 under the action of the pressure difference. When it is determined that the current operating mode needs to start the refrigerant tank to release the refrigerant, the gas balance valve 224 is closed, the drain valve 223 is opened, and the refrigerant inside the tank is discharged from the tank under the action of gravity and pressure difference and enters the pipeline circulation.

[0153] The present application provides a method for controlling an air conditioning system based on the above embodiments, including the following steps:

[0154] Determine the operating mode of the air conditioning system;

[0155] According to a preset control strategy and based on the working mode, the four-way valve and the control valve assembly are controlled to adjust the states of the outdoor heat exchanger 105, the indoor heat exchanger and the accumulator 201.

[0156] In some embodiments, controlling the four-way valve and the control valve assembly according to a preset control strategy and based on the working mode to adjust the states of the outdoor heat exchanger 105, the indoor heat exchanger, and the accumulator 201 includes:

[0157] During the period of low electricity price of the power supply system, the four-way valve and the control valve assembly are controlled based on the working mode to enable the accumulator 201 to store energy;

[0158] During a period of high electricity prices in the power supply system, the four-way valve and the control valve assembly are controlled based on the operation mode to enable the accumulator 201 to release energy.

[0159] In some embodiments, the operating modes of the air-conditioning system include conventional cooling, full cold storage, cold storage and cooling, supercooling release, condensation release, parallel cold release, conventional heating, full heat storage, heat storage and heating, mixed heat release, independent heat release and defrosting.

[0160] The present application also provides a control method based on the above air conditioning system, including:

[0161] Determine the operating mode of the air conditioning system;

[0162] According to the preset control strategy and based on the working mode, the actions of the four-way valve 104, the first control valve 208, the second control valve 207, the third control valve 212, the fourth control valve 209, the fifth control valve 210, the bypass valve 211, the accumulator throttling element 206 and the outdoor throttling element 106 are controlled to change the states of the outdoor heat exchanger 105, the indoor heat exchanger and the accumulator 201.

[0163] In some embodiments, when the working mode is the conventional cooling mode, the four-way valve 104 is controlled to be powered off, the bypass valve 211 and the outdoor throttling element 106 are opened, and the first control valve 208, the second control valve 207, the third control valve 212, the fourth control valve 209, the fifth control valve 210 and the energy storage throttling element 206 are closed;

[0164] The outdoor heat exchanger 105 is used as a condenser, the indoor heat exchanger is used as an evaporator, and the accumulator 201 is not working.

[0165] In some embodiments, when the working mode is the full cold storage mode, the four-way valve 104 is controlled to be powered off, the fifth control valve 210, the second control valve 207, the outdoor throttling element 106, and the energy storage throttling element 206 are opened, and the bypass valve 211, the first control valve 208, the fourth control valve 209, and the third control valve 212 are closed;

[0166] The outdoor heat exchanger 105 is used as a condenser, the accumulator 201 is used as an evaporator, and the refrigerant enters from a first port 201 a of the accumulator 201 and flows out from a second port 201 b of the accumulator 201 .

[0167] In some embodiments, when the working mode is the cooling and cold storage mode, the four-way valve 104 is controlled to be powered off, the bypass valve 211, the second control valve 207, the fifth control valve 210, the outdoor throttling element 106 and the energy storage throttling element 206 are controlled to be open, and the first control valve 208 and the third control valve 212 are controlled to be closed;

[0168] The outdoor heat exchanger 105 is used as a condenser, the accumulator 201 and the indoor heat exchanger are used as evaporators at the same time, and the refrigerant enters from the first port 201 a of the accumulator 201 and flows out from the second port 201 b of the accumulator 201 .

[0169] In some embodiments, when the working mode is the supercooling release mode, the four-way valve 104 is controlled to be powered off, the outdoor throttling element 106, the second control valve 207, the third control valve 212 and the fourth control valve 209 are controlled to be open, and the bypass valve 211, the fifth control valve 210, the first control valve 208 and the energy storage throttling element 206 are closed;

[0170] The outdoor heat exchanger 105 is used as a condenser, the accumulator 201 is used as a subcooler, and the refrigerant enters from the second port 201 b of the accumulator 201 and flows out from the first port 201 a of the accumulator 201 .

[0171] In some embodiments, when the working mode is the condensing cooling mode, the four-way valve 104 is controlled to be powered off, the first control valve 208, the third control valve 212, and the fourth control valve 209 are controlled to be open, and the bypass valve 211, the fifth control valve 210, the outdoor throttling element 106, and the energy storage throttling element 206 are controlled to be closed;

[0172] The outdoor heat exchanger 105 does not work, the accumulator 201 serves as a condenser, and the refrigerant enters from the second port 201 b of the accumulator 201 and flows out from the first port 201 a of the accumulator 201 .

[0173] In some embodiments, when the working mode is the parallel cooling mode, the four-way valve 104 is controlled to be powered off, the outdoor throttling element 106, the bypass valve 211, the third control valve 212, the fourth control valve 209 and the first control valve 208 are controlled to be open, and the energy storage throttling element 206, the second control valve 207 and the fifth control valve 210 are controlled to be closed;

[0174] The outdoor heat exchanger 105 is used as a condenser, the accumulator 201 is used as a condenser, and the refrigerant enters from the second port 201 b of the accumulator 201 and flows out from the first port 201 a of the accumulator 201 .

[0175] In some embodiments, when the working mode is the conventional heating mode, the four-way valve 104 is energized, the bypass valve 211 and the outdoor throttling element 106 are opened, and the first control valve 208, the second control valve 207, the third control valve 212, the fourth control valve 209, the fifth control valve 210 and the energy storage throttling element 206 are closed;

[0176] The outdoor heat exchanger 105 is used as an evaporator, and the accumulator 201 is not working.

[0177] In some embodiments, when the working mode is the full heat storage mode, the four-way valve 104 is controlled to be energized, the bypass valve 211, the first control valve 208, the third control valve 212, the fourth control valve 209 and the outdoor throttling element 106 are opened, and the energy storage throttling element 206, the second control valve 207 and the fifth control valve 210 are closed;

[0178] The accumulator 201 serves as a condenser, the outdoor heat exchanger 105 serves as an evaporator, and the refrigerant enters from the second port 201 b of the accumulator 201 and flows out from the first port 201 a of the accumulator 201 .

[0179] In some embodiments, when the working mode is the heating and heat storage mode, the four-way valve 104 is controlled to be energized, the bypass valve 211, the first control valve 208, the third control valve 212, the fourth control valve 209 and the outdoor throttling element 106 are opened, and the second control valve 207, the fifth control valve 210 and the energy storage throttling element 206 are closed;

[0180] The accumulator 201 serves as a condenser, the outdoor heat exchanger 105 serves as an evaporator, and the refrigerant enters from the second port 201 b of the accumulator 201 and flows out from the first port 201 a of the accumulator 201 .

[0181] In some embodiments, when the working mode is the mixed heat release mode, the four-way valve 104 is energized, the fifth control valve 210, the energy storage throttling element 206, the outdoor throttling element 106 and the bypass valve 211 are opened, and the first control valve 208, the third control valve 212 and the fourth control valve 209 are closed;

[0182] The accumulator 201 and the outdoor heat exchanger 105 serve as evaporators at the same time, and the indoor heat exchanger serves as a condenser. The refrigerant enters from the first port 201 a of the accumulator 201 and flows out from the second port 201 b of the accumulator 201 .

[0183] In some embodiments, when the working mode is the independent heat release mode, the four-way valve 104 is energized, the fifth control valve 210, the bypass valve 211, the second control valve 207, and the energy storage throttling element 206 are opened, and the first control valve 208, the outdoor throttling element 106, the third control valve 212, and the fourth control valve 209 are closed;

[0184] The outdoor heat exchanger 105 does not work, the accumulator 201 serves as an evaporator, the indoor heat exchanger serves as a condenser, and the refrigerant enters from the first port 201 a of the accumulator 201 and flows out from the second port 201 b of the accumulator 201 .

[0185] In some embodiments, when the working mode is the defrost mode, the four-way valve 104 is controlled to be powered off, the second control valve 207, the fifth control valve 210, the outdoor throttling element 106 and the energy storage throttling element 206 are opened, and the bypass valve 211, the first control valve 208 and the third control valve 212 are closed;

[0186] The indoor heat exchanger does not work, the accumulator 201 serves as an evaporator, the indoor heat exchanger serves as a condenser, and the refrigerant enters from the first port 201 a of the accumulator 201 and flows out from the second port 201 b of the accumulator 201 .

[0187] The present application also provides a control device for an air conditioning system, comprising:

[0188] a memory configured to store instructions;

[0189] The processor is coupled to the memory, and is configured to execute and implement the above control method based on instructions stored in the memory.

[0190] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the above-mentioned control method is implemented.

[0191] The present application provides an air conditioning system that can provide energy storage and release services for various power load transfer scenarios.

[0192] like Figure 1 As shown, the air conditioning system of the embodiment of the present application includes an outdoor unit 1, an energy storage device 2, a liquid side main pipe 3 and a gas side main pipe 4. The liquid side main pipe 3 and the gas side main pipe 4 are connected to the indoor heat exchanger

[0193] The outdoor unit 1 includes a compressor 101 , a gas-liquid separator 102 , a subcooler 103 , a four-way valve 104 , an outdoor heat exchanger 105 , an outdoor throttling element 106 and a subcooling throttling element 107 .

[0194] The four-way valve 104 has a first valve port, a second valve port, a third valve port, and a fourth valve port. When the four-way valve 104 is powered off, the first valve port and the second valve port are connected, and the third valve port and the fourth valve port are connected. When the four-way valve 104 is powered on, the first valve port and the fourth valve port are connected, and the second valve port and the third valve port are connected.

[0195] The first valve port of the four-way valve 104 is connected to the exhaust port of the compressor 101, the second valve port of the four-way valve 104 is connected to the outdoor heat exchanger 105, the third valve port of the four-way valve 104 is connected to the gas-liquid separator 102, and the fourth valve port of the four-way valve 104 is connected to the gas side main pipe 4.

[0196] A first end of the outdoor heat exchanger 105 is connected to the second valve port of the four-way valve 104 , a second end of the outdoor heat exchanger 105 is connected to the outdoor throttling element 106 , and is connected to the subcooler 103 through the outdoor throttling element 106 .

[0197] Energy storage device 2 includes an accumulator 201, a first pipe 202, a second pipe 204, a third pipe 205, a fourth pipe 213, a fifth pipe 203, a bypass pipe, and a control valve assembly. The control valve assembly includes a first control valve 208, a second control valve 207, a third control valve 212, a fourth control valve 209, a fifth control valve 210, a bypass valve 211, and an energy storage throttling element 206. The first pipe 202 and the fifth pipe 203 are used to connect the energy storage device 2 to the outdoor unit 1.

[0198] The first end 201a of the accumulator 201 is connected to the exhaust pipe of the compressor 101 through the second pipe 204 and the first pipe 202, connected to the liquid side main pipe 3 through the second pipe 204 and the bypass pipe, and connected to the liquid side main pipe 3 through the fourth pipe 213.

[0199] The second end 201 b of the accumulator 201 is connected to the second tube 204 through the third tube 205 , and is connected to the gas-liquid separator 102 through the fifth tube 203 .

[0200] A liquid separation device 214 and an energy storage throttling element 206 are arranged at the first end of the accumulator 201, a first control valve 208 is arranged on the first pipe 202, a second control valve 207 is arranged on the second pipe 204, a fourth control valve 209 is arranged on the fourth pipe 213, a third control valve 212 is arranged on the third pipe 205, a fifth control valve 210 is arranged on the fifth pipe 203, and a bypass valve 211 is also arranged between the second end of the second pipe 204 and the liquid side main pipe 3.

[0201] The accumulator 201 is filled with energy storage material and is provided with a refrigerant pipe. The refrigerant flows in the pipe and fully exchanges heat with the energy storage material to achieve cold storage and cold release.

[0202] By switching the above valves, twelve modes can be realized, including conventional cooling, complete cold storage, cooling and cold storage, supercooling cold release, condensation cold release, parallel cold release, conventional heating, complete heat storage, heating and heat storage, mixed heat release, independent heat release, and defrosting. The control methods of the twelve modes can be referred to above. Figures 2 to 13 The description is not repeated here.

[0203] like Figure 14 As shown, in a first alternative embodiment, with Figure 1 The difference between the illustrated embodiment and the embodiment is that the fourth control valve 209 is replaced by a solenoid valve to more strictly control the on-off of the fourth pipe 213 .

[0204] In this embodiment, to achieve switching among twelve modes, the actions of each valve are shown in the following table.

[0205]

[0206]

[0207] like Figure 15 As shown, in a second alternative embodiment, with Figure 1 The difference of the embodiment shown is that the second control valve 207 is replaced by a solenoid valve to ensure stricter control of the flow path. The control method at this time is as follows:

[0208]

[0209] like Figure 16 As shown, in a third alternative embodiment, with Figure 1The embodiment shown differs in that a throttling element 215 is connected in parallel at both ends of the third control valve 212. When in heat storage and heating mode or parallel cooling mode, the refrigerant flow to the accumulator and indoor unit can be distributed by adjusting the opening of the throttling element 215. The control method in this case is as follows:

[0210]

[0211] like Figure 17 As shown, in a fourth alternative embodiment, Figure 1 The difference of the embodiment shown is that the first pipe 202 is connected to the gas side main pipe 4. Figure 1 Most of the functions of the embodiment shown are only condensation release and parallel release during refrigeration. Figure 1 The embodiment shown is exactly the same. When heating, fully storing heat, storing heat and heating at the same time, the high-temperature and high-pressure gaseous refrigerant still enters the accumulator through the first gas pipe 202, and the opening and closing of the valve and the refrigerant flow path are the same. Figure 1 The same as the embodiment shown. Figure 1 The embodiments shown are completely identical.

[0212] like Figure 18 As shown, in the fifth alternative embodiment, a liquid storage tank 220 is additionally provided on the basis of the energy storage system. By storing and releasing the refrigerant in the liquid storage tank 220, the amount of refrigerant in different operating modes is controlled, so that the amount of refrigerant circulating in the system is consistent with the refrigerant demand in different operating modes, thereby achieving the best heat exchange effect.

[0213] like Figure 19 and Figure 20 As shown, the liquid storage tank 220 has three interfaces. The first inlet 220a is connected to the liquid side main pipe 3 through the liquid inlet valve 221, the second inlet 220b is connected to the first pipe 202 through the pressure valve 222, and is connected to the fifth pipe 203 through the capillary tube 225 and the gas balance valve 224, and the outlet 220c is connected to the fifth pipe 203 through the capillary tube 225 and the liquid discharge valve 223.

[0214] like Figure 21 As shown, in the sixth alternative embodiment, a liquid storage tank 220 is additionally provided on the basis of the energy storage system. By storing and releasing the refrigerant in the liquid storage tank 220, the amount of refrigerant in different operating modes is controlled, so that the amount of refrigerant circulating in the system is consistent with the refrigerant demand in different operating modes, thereby achieving the best heat exchange effect.

[0215] and Figure 18 The structure of the liquid storage tank 220 in the illustrated embodiment is different, and the liquid storage tank 220 has two interfaces.

[0216] In summary, the air conditioning system of the embodiment of the present application stores energy during off-peak electricity price periods and releases energy during peak electricity price periods, thereby reducing the power consumption of the air conditioner during these periods. This achieves "peak shaving" of electricity and reduces the operating cost of the air conditioner. In addition, by switching the four-way valve and the control valve group, the air conditioning system can perform twelve functions, such as cold storage and cold release, which broadens the scope of use of the energy storage system and improves its availability. Moreover, the accumulator of the embodiment of the present application can take in refrigerant in both directions, which not only ensures uniform liquid distribution when the liquid refrigerant enters the accumulator, but also reduces the pressure loss when the gaseous refrigerant enters the accumulator. Bidirectional refrigerant flow means that the refrigerant flows in opposite directions in the accumulator during cold storage and cold release. Specifically, during cold storage, the temperature of the refrigerant gradually increases along the process flow. Therefore, at the end of cold storage, the temperature of the energy storage material in the accumulator also has a distribution pattern from low to high. When cold is released, the high-temperature refrigerant flows into the accumulator from the other end, with the opposite flow direction. At this time, as the heat exchange with the energy storage material with a temperature distribution from high to low is carried out, the heat exchange can be more sufficient (countercurrent heat exchange), the obtained refrigerant temperature is also lower, and the effect is better.

[0217] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present application. They should all be included in the scope of the technical solution for protection requested in this application.

Claims

1. An air conditioning system, characterized in that: include: compressor (101); outdoor heat exchanger (105); Liquid side main pipe (3); Gas side main pipe (4); an indoor heat exchanger, the indoor heat exchanger being connected to the liquid side main pipe (3) and the gas side main pipe (4); a four-way valve (104), the four-way valve (104) having a first valve port, a second valve port, a third valve port, and a fourth valve port, the first valve port being connected to the exhaust port of the compressor (101), the second valve port being connected to the outdoor heat exchanger (105), the third valve port being connected to the intake port of the compressor (101), and the fourth valve port being connected to the gas-side main pipe (4); The accumulator (201) has a first port (201a) and a second port (201b), wherein the first port (201a) is connected to the outdoor heat exchanger (105) and the liquid-side main pipe (3) in a switchable manner, and the second port (201b) is connected to the exhaust port of the compressor (101), the intake port of the compressor (101), and the outdoor heat exchanger (105) in a switchable manner. and A control valve assembly, wherein the four-way valve (104) and the control valve assembly operate to adjust the working states of the accumulator (201), the outdoor heat exchanger (105) and the indoor heat exchanger and enable the air-conditioning system to switch between different working modes. The accumulator (201) has a first working state and a second working state. In the first working state, the refrigerant enters the accumulator (201) from the first port (201a) and flows out through the second port (201b); in the second working state, the refrigerant enters the accumulator (201) from the second port (201b) and flows out through the first port (201a). The air conditioning system comprises a first pipe (202), a second pipe (204), a third pipe (205), a fourth pipe (213), a fifth pipe and a bypass pipe, the control valve assembly comprises a first control valve (208), a second control valve (207), a third control valve (212), a fourth control valve (209), a fifth control valve (210), a bypass valve (211), an energy storage throttling element (206) and an outdoor throttling element (106), the first pipe (202) is connected to the exhaust port of the compressor (101), the first control valve (208) is connected to the exhaust port of the compressor (101), and the first control valve (209) is connected to the exhaust port of the compressor (101). 08) is arranged on the first pipe (202) and is configured to control the on-off of the first pipe (202), the first end of the second pipe (204) is connected to the first port (201a), the second end of the second pipe (204) is connected to the outdoor heat exchanger (105), the second pipe (204) and the first pipe (202) are connected at a first connection point, the energy storage throttling element (206) is arranged between the first connection point and the first end of the second pipe (204), and the second control valve (207) is arranged at the first connection point. The first port (201a) is connected to the liquid side main pipe (3) through a fourth pipe (213), and the fourth control valve (209) is provided on the fourth pipe (213) and configured to control the on / off of the fourth pipe (213). The fourth pipe (213) is connected to the second pipe (204) through the bypass pipe. 04), the bypass valve (211) is arranged on the bypass pipe and is configured to control the on-off of the bypass pipe, the second port (201b) is connected to the suction port of the compressor (101) through the fifth pipe, the fifth control valve (210) is arranged on the fifth pipe and is configured to control the on-off of the fifth pipe, the first end of the outdoor heat exchanger (105) is connected to the second valve port of the four-way valve (104), and the second end of the outdoor heat exchanger (105) is connected to the outdoor throttling element (106).

2. The air conditioning system according to claim 1, characterized in that A liquid separation device (214) is provided at the first port (201a), and the refrigerant enters the accumulator (201) through the liquid separation device (214).

3. The air conditioning system according to claim 1 or 2, characterized in that: The air conditioning system further comprises a liquid storage tank (220), the liquid storage tank (220) having a first interface and a second interface, the first interface being connected to the liquid side main pipe (3), the second interface being connected to the air intake of the compressor (101), and the liquid storage tank (220) having a closed state, a refrigerant storage state, and a refrigerant release state.

4. The air conditioning system according to claim 3, characterized in that The air conditioning system further comprises a gas balancing valve (224) arranged between the first interface and the outdoor heat exchanger (105), and a drain valve (223) arranged between the second interface and the air intake of the compressor (101). In the closed state, the gas balancing valve (224) and the drain valve (223) are both closed; in the refrigerant storage state, the gas balancing valve (224) and the drain valve (223) are both opened; in the refrigerant release state, the gas balancing valve (224) is closed, and the drain valve (223) is opened.

5. A control method for an air conditioning system according to any one of claims 1 to 4, characterized in that: determining an operating mode of the air conditioning system; According to a preset control strategy and based on the working mode, the four-way valve and the control valve assembly are controlled to adjust the states of the outdoor heat exchanger (105), the indoor heat exchanger and the accumulator (201).

6. The control method of the air conditioning system according to claim 5, characterized in that: Controlling the actions of the four-way valve and the control valve assembly according to a preset control strategy and based on the working mode to adjust the states of the outdoor heat exchanger (105), the indoor heat exchanger, and the accumulator (201) includes: During a period when the power supply system has a low electricity price, the four-way valve and the control valve assembly are controlled to operate based on the working mode so that the accumulator (201) can store energy; During a period when the power supply system has a high electricity price, the four-way valve and the control valve assembly are controlled based on the working mode to enable the accumulator (201) to release energy.

7. The control method of the air conditioning system according to claim 5, characterized in that: The operating modes of the air-conditioning system include conventional cooling, complete cold storage, cold storage and cooling, supercooling and cold release, condensation and cold release, parallel cold release, conventional heating, complete heat storage, heat storage and heating, mixed heat release, independent heat release and defrost.

8. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the conventional cooling mode, the four-way valve (104) is controlled to be powered off, the bypass valve (211) and the outdoor throttling element (106) are opened, and the first control valve (208), the second control valve (207), the third control valve (212), the fourth control valve (209), the fifth control valve (210) and the energy storage throttling element (206) are closed; The outdoor heat exchanger (105) is used as a condenser, the indoor heat exchanger is used as an evaporator, and the accumulator (201) is not in operation.

9. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the full cold storage mode, the four-way valve (104) is controlled to be powered off, the fifth control valve (210), the second control valve (207), the outdoor throttling element (106), and the energy storage throttling element (206) are opened, and the bypass valve (211), the first control valve (208), the fourth control valve (209), and the third control valve (212) are closed; The outdoor heat exchanger (105) is used as a condenser, the accumulator (201) is used as an evaporator, and the refrigerant enters from a first port (201a) of the accumulator (201) and flows out from a second port (201b) of the accumulator (201).

10. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the cooling and cold storage mode, the four-way valve (104) is controlled to be powered off, the bypass valve (211), the second control valve (207), the fifth control valve (210), the outdoor throttling element (106) and the energy storage throttling element (206) are controlled to be opened, and the first control valve (208) and the third control valve (212) are controlled to be closed; The outdoor heat exchanger (105) is used as a condenser, the accumulator (201) and the indoor heat exchanger are used as evaporators at the same time, and the refrigerant enters from the first port (201a) of the accumulator (201) and flows out from the second port (201b) of the accumulator (201).

11. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the supercooling release mode, the four-way valve (104) is controlled to be powered off, the outdoor throttling element (106), the second control valve (207), the third control valve (212) and the fourth control valve (209) are controlled to be open, and the bypass valve (211), the fifth control valve (210), the first control valve (208) and the energy storage throttling element (206) are controlled to be closed; The outdoor heat exchanger (105) is used as a condenser, the accumulator (201) is used as a subcooler, and the refrigerant enters from the second port (201b) of the accumulator (201) and flows out from the first port (201a) of the accumulator (201).

12. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the condensation and cooling mode, the four-way valve (104) is controlled to be powered off, the first control valve (208), the third control valve (212), and the fourth control valve (209) are controlled to be open, and the bypass valve (211), the fifth control valve (210), the outdoor throttling element (106), and the energy storage throttling element (206) are controlled to be closed; The outdoor heat exchanger (105) is not in operation, the accumulator (201) serves as a condenser, and the refrigerant enters from the second port (201b) of the accumulator (201) and flows out from the first port (201a) of the accumulator (201).

13. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the parallel cooling mode, the four-way valve (104) is controlled to be powered off, the outdoor throttling element (106), the bypass valve (211), the third control valve (212), the fourth control valve (209) and the first control valve (208) are controlled to be open, and the energy storage throttling element (206), the second control valve (207) and the fifth control valve (210) are controlled to be closed; The outdoor heat exchanger (105) is used as a condenser, the accumulator (201) is used as a condenser, and the refrigerant enters from the second port (201b) of the accumulator (201) and flows out from the first port (201a) of the accumulator (201).

14. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is a conventional heating mode, the four-way valve (104) is controlled to be energized, the bypass valve (211) and the outdoor throttling element (106) are opened, and the first control valve (208), the second control valve (207), the third control valve (212), the fourth control valve (209), the fifth control valve (210) and the energy storage throttling element (206) are closed; The outdoor heat exchanger (105) is used as an evaporator, and the accumulator (201) is not in operation.

15. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the full heat storage mode, the four-way valve (104) is controlled to be energized, the bypass valve (211), the first control valve (208), the third control valve (212), the fourth control valve (209) and the outdoor throttling element (106) are opened, and the energy storage throttling element (206), the second control valve (207) and the fifth control valve (210) are closed; The accumulator (201) serves as a condenser, the outdoor heat exchanger (105) serves as an evaporator, and the refrigerant enters from the second port (201b) of the accumulator (201) and flows out from the first port (201a) of the accumulator (201).

16. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the heating and heat storage mode, the four-way valve (104) is controlled to be energized, the bypass valve (211), the first control valve (208), the third control valve (212), the fourth control valve (209) and the outdoor throttling element (106) are opened, and the second control valve (207), the fifth control valve (210) and the energy storage throttling element (206) are closed; The accumulator (201) serves as a condenser, the outdoor heat exchanger (105) serves as an evaporator, and the refrigerant enters from the second port (201b) of the accumulator (201) and flows out from the first port (201a) of the accumulator (201).

17. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the mixed heat release mode, the four-way valve (104) is controlled to be energized, the fifth control valve (210), the energy storage throttling element (206), the outdoor throttling element (106) and the bypass valve (211) are opened, and the first control valve (208), the third control valve (212) and the fourth control valve (209) are closed; The accumulator (201) and the outdoor heat exchanger (105) serve as evaporators at the same time, the indoor heat exchanger serves as a condenser, and the refrigerant enters from the first port (201a) of the accumulator (201) and flows out from the second port (201b) of the accumulator (201).

18. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the independent heat release mode, the four-way valve (104) is controlled to be energized, the fifth control valve (210), the bypass valve (211), the second control valve (207), and the energy storage throttling element (206) are opened, and the first control valve (208), the outdoor throttling element (106), the third control valve (212), and the fourth control valve (209) are closed; The outdoor heat exchanger (105) is not working, the accumulator (201) serves as an evaporator, the indoor heat exchanger serves as a condenser, and the refrigerant enters from the first port (201a) of the accumulator (201) and flows out from the second port (201b) of the accumulator (201).

19. The control method of the air conditioning system according to claim 7, characterized in that: When the working mode is the defrost mode, the four-way valve (104) is controlled to be powered off, the second control valve (207), the fifth control valve (210), the outdoor throttling element (106) and the energy storage throttling element (206) are opened, and the bypass valve (211), the first control valve (208) and the third control valve (212) are closed; The indoor heat exchanger is not in operation, the accumulator (201) serves as an evaporator, the indoor heat exchanger serves as a condenser, and the refrigerant enters from the first port (201a) of the accumulator (201) and flows out from the second port (201b) of the accumulator (201).

20. A control device for an air conditioning system, comprising: a memory configured to store instructions; A processor is coupled to the memory, and the processor is configured to execute the control method according to any one of claims 5 to 19 based on instructions stored in the memory.

21. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the control method according to any one of claims 5 to 19 is implemented.

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