Refrigeration system, its control method and control device

Abstract

The present invention relates to a refrigeration system and a control method and a control device thereof, wherein the refrigeration system comprises a compressor (101), an outdoor heat exchanger (105), an indoor heat exchanger (301), an accumulator (201) and a valve assembly, wherein a first port (201a) of the accumulator (201) is respectively connected to the indoor heat exchanger (301) and the outdoor heat exchanger (105), and a second port (201b) of the accumulator (201) is respectively connected to the indoor heat exchanger (301), the outdoor heat exchanger (105), the compressor (101), and the valve assembly. The air inlet of the machine (101) is connected to the exhaust port of the compressor (101); the valve assembly is connected to the compressor (101), the outdoor heat exchanger (105), the indoor heat exchanger (301) and the accumulator (201), and the valve assembly is configured to control the flow direction of the refrigerant and / or the on-off of the connecting pipeline to adjust the status of the outdoor heat exchanger, the indoor heat exchanger and the accumulator, and realize the switching of the refrigeration system between different working modes, and the status of the accumulator includes a non-working state, a cold storage state and a cold release state.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a refrigeration system and a control method and a control device thereof. Background Art

[0002] In order to alleviate the discomfort caused by hot weather, people usually use refrigeration equipment 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.

[0004] It should be noted that the information disclosed in the background technology section of the present invention is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Summary of the Invention

[0005] The embodiments of the present invention provide a refrigeration system and a control method and a control device thereof, which can meet more needs of users.

[0006] According to a first aspect of the present invention, there is provided a refrigeration system comprising:

[0007] compressor;

[0008] outdoor heat exchanger;

[0009] Indoor heat exchanger;

[0010] an accumulator, a first port of the accumulator being in communication with the indoor heat exchanger and the outdoor heat exchanger, respectively, and a second port of the accumulator being in communication with the indoor heat exchanger, the outdoor heat exchanger, an air inlet of the compressor, and an air outlet of the compressor, respectively; and

[0011] The valve assembly is connected to the compressor, outdoor heat exchanger, indoor heat exchanger and accumulator. The valve assembly is configured to control the flow direction of the refrigerant and / or the on-off of the connecting pipes to adjust the status of the outdoor heat exchanger, indoor heat exchanger and accumulator, and realize the switching of the refrigeration system between different working modes. The status of the accumulator includes non-working state, cold storage state and cold release state.

[0012] In some embodiments, the flow direction of the refrigerant in the accumulator when the accumulator is in a cold storage state is opposite to the flow direction of the refrigerant in the accumulator when the accumulator is in a cold release state.

[0013] In some embodiments, the valve assembly includes a first control valve, which is disposed on a connecting pipe between the first port of the accumulator and the indoor heat exchanger.

[0014] In some embodiments, the first control valve includes a first electrically controlled valve or a first one-way valve, and an inlet of the first one-way valve is in communication with the first port of the accumulator.

[0015] In some embodiments, the valve assembly includes a first throttle element, which is disposed on a connecting pipe between the first port of the accumulator and the outdoor heat exchanger.

[0016] In some embodiments, the valve assembly further includes a second control valve, which is disposed on the connecting pipeline between the outdoor heat exchanger and the first throttling element.

[0017] In some embodiments, the second control valve includes a second electrically controlled valve or a second one-way valve, and an inlet of the second one-way valve is in communication with the outdoor heat exchanger.

[0018] In some embodiments, the valve assembly further includes a third control valve, one end of the third control valve being connected to the connecting pipe between the first throttle member and the second control valve, and the other end of the third control valve being connected to the connecting pipe between the exhaust port of the compressor and the outdoor heat exchanger.

[0019] In some embodiments, the valve assembly further includes a fourth control valve, one end of the fourth control valve is communicated with the second port of the accumulator, and the other end of the fourth control valve is communicated with the third control valve and the second control valve respectively.

[0020] In some embodiments, the valve assembly includes a fifth control valve, one end of the fifth control valve is connected to the indoor heat exchanger, and the other end of the fifth control valve is connected to the connecting pipeline between the second control valve and the outdoor heat exchanger.

[0021] In some embodiments, the valve assembly includes a sixth control valve, which is disposed on a connecting pipeline between the second port of the accumulator and the air inlet of the compressor.

[0022] In some embodiments, the valve assembly further includes a second throttle element connected to the connecting pipe between the outdoor heat exchanger and the indoor heat exchanger.

[0023] In some embodiments, the refrigeration system further includes a subcooler disposed between the outdoor heat exchanger and the indoor heat exchanger, and the subcooler is connected to the air inlet of the compressor, and the second throttling element is disposed between the outdoor heat exchanger and the subcooler.

[0024] In some embodiments, the valve assembly also includes a third throttle member, which is arranged between the second throttle member and the subcooler, and the port of the subcooler connected to the third throttle member and the port of the subcooler connected to the air intake of the compressor are connected through the internal pipeline of the subcooler.

[0025] In some embodiments, the valve assembly includes a first throttle, a second throttle, a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve and a sixth control valve, the first throttle is connected between the first port of the accumulator and the second control valve, the second throttle is connected to the connecting pipe between the outdoor heat exchanger and the indoor heat exchanger, the first control valve is arranged on the connecting pipe between the first port of the accumulator and the indoor heat exchanger, the second control valve is arranged on the connecting pipe between the outdoor heat exchanger and the first throttle, one end of the third control valve is connected to the connecting pipe between the first throttle and the second control valve, the other end of the third control valve is connected to the connecting pipe between the exhaust port of the compressor and the outdoor heat exchanger, one end of the fourth control valve is communicated with the second port of the accumulator, the other end of the fourth control valve is communicated with the third control valve and the second control valve respectively, one end of the fifth control valve is communicated with the indoor heat exchanger, the other end of the fifth control valve is connected to the connecting pipe between the second control valve and the outdoor heat exchanger, and the sixth control valve is arranged on the connecting pipe between the second port of the accumulator and the air inlet of the compressor.

[0026] In some embodiments, the refrigeration system also includes a storage container, which is fluidically connected to the compressor, the outdoor heat exchanger, and the indoor heat exchanger. The valve assembly is also configured to adjust the state of the storage container by controlling the flow direction of the refrigerant and / or the on-off state of the connecting pipeline. The state of the storage container includes a closed state, a refrigerant storage state, and a refrigerant release state.

[0027] In some embodiments, the valve assembly includes a first throttle, a second control valve, a third control valve, a fifth control valve, a seventh control valve, an eighth control valve, a ninth control valve and a tenth control valve, the first throttle is connected between the first port of the accumulator and the second control valve, the second control valve is arranged on the connecting pipe between the outdoor heat exchanger and the first throttle, one end of the third control valve is connected to the connecting pipe between the first throttle and the second control valve, the other end of the third control valve is connected to the connecting pipe between the exhaust port of the compressor and the outdoor heat exchanger, one end of the fifth control valve is communicated with the indoor heat exchanger, the other end of the fifth control valve is connected to the connecting pipe between the second control valve and the outdoor heat exchanger, the storage container It has a first interface, a second interface and a third interface, one end of the seventh control valve is connected to the first interface of the storage container, and the other end of the seventh control valve is connected to the connecting pipeline between the fifth control valve and the outdoor heat exchanger, one end of the eighth control valve is connected to the second interface of the storage container, and the other end of the eighth control valve is connected to the connecting pipeline between the exhaust port of the compressor and the third control valve, one end of the ninth control valve is connected to the third interface of the storage container, and the other end of the ninth control valve is connected to the connecting pipeline between the air inlet of the compressor and the indoor heat exchanger, one end of the tenth control valve is connected to the second interface of the storage container, and the other end of the tenth control valve is connected to the connecting pipeline between the air inlet of the compressor and the indoor heat exchanger.

[0028] In some embodiments, the valve assembly further includes a fourth throttle member and a fifth throttle member, wherein the fourth throttle member is connected between the ninth control valve and the third interface of the storage container, and the fifth throttle member is connected between the tenth control valve and the second interface of the storage container.

[0029] In some embodiments, the valve assembly includes a first throttle, a second control valve, a fifth control valve, an eleventh control valve, a twelfth control valve and a sixth throttle, the first throttle is connected between the first port of the accumulator and the second control valve, the second control valve is arranged on the connecting pipe between the outdoor heat exchanger and the first throttle, one end of the fifth control valve is connected to the indoor heat exchanger, and the other end of the fifth control valve is connected to the connecting pipe between the second control valve and the outdoor heat exchanger, the storage container includes a fourth interface and a fifth interface, one end of the eleventh control valve is connected to the fourth interface of the storage container, the other end of the eleventh control valve is connected to the connecting pipe between the fifth control valve and the outdoor heat exchanger, the twelfth control valve is connected between the fifth interface of the storage container and the sixth throttle, and the other end of the sixth throttle is connected to the connecting pipe between the air inlet of the compressor and the indoor heat exchanger.

[0030] According to a second aspect of the present invention, a control method based on the above-mentioned refrigeration system is provided, comprising:

[0031] Determine the operating mode of the refrigeration system;

[0032] According to the preset control strategy and based on the working mode, the action of the valve components in the refrigeration system and the status of the outdoor heat exchanger, indoor heat exchanger and accumulator are controlled.

[0033] In some embodiments, determining the operating mode of the refrigeration system includes:

[0034] During a period of high electricity prices, the refrigeration system is configured to operate in a non-operating or cooling state corresponding to the accumulator.

[0035] During a period of low electricity prices for the power supply system, the operating mode of the refrigeration system is determined to be a mode in which the corresponding accumulator is in a non-operating state or a cold storage state.

[0036] In some embodiments, determining the operating mode of the refrigeration system includes:

[0037] Check whether there is energy in the accumulator;

[0038] Determine the operating mode of the refrigeration system based on the test results.

[0039] According to a third aspect of the present invention, a control method based on the above-mentioned refrigeration system is provided, comprising:

[0040] Determine the operating mode of the refrigeration system;

[0041] According to a preset control strategy and based on the working mode, the actions of the first throttling device, the second throttling device, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve and the sixth control valve in the refrigeration system and the states of the outdoor heat exchanger, the indoor heat exchanger and the accumulator are controlled.

[0042] In some embodiments, controlling the actions of a first throttle element, a second throttle element, a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, and a sixth control valve in a refrigeration system, as well as states of an outdoor heat exchanger, an indoor heat exchanger, and an accumulator according to a preset control strategy and based on an operating mode includes:

[0043] When the working mode is the normal cooling mode, the fifth control valve and the second throttle member are controlled to be open, and the first control valve, the second control valve, the third control valve, the fourth control valve, the sixth control valve and the first throttle member are controlled to be closed;

[0044] The indoor heat exchanger is used as an evaporator, the outdoor heat exchanger is used as a condenser, and the accumulator is closed.

[0045] In some embodiments, controlling the actions of a first throttle element, a second throttle element, a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, and a sixth control valve in a refrigeration system, as well as states of an outdoor heat exchanger, an indoor heat exchanger, and an accumulator according to a preset control strategy and based on an operating mode includes:

[0046] When the working mode is the full cold storage mode, the second control valve, the sixth control valve, the first throttle member and the second throttle member are controlled to be open, and the first control valve, the third control valve, the fourth control valve and the fifth control valve are controlled to be closed;

[0047] The indoor heat exchanger is closed, the outdoor heat exchanger acts as a condenser, and the accumulator acts as an evaporator.

[0048] In some embodiments, controlling the actions of a first throttle element, a second throttle element, a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, and a sixth control valve in a refrigeration system, as well as states of an outdoor heat exchanger, an indoor heat exchanger, and an accumulator according to a preset control strategy and based on an operating mode includes:

[0049] When the working mode is the refrigeration and cold storage mode, the second control valve, the fifth control valve, the sixth control valve, the first throttle member and the second throttle member are controlled to be open, and the first control valve, the third control valve and the fourth control valve are controlled to be closed;

[0050] Among them, the indoor heat exchanger is used as an evaporator, the outdoor heat exchanger is used as a condenser, and the accumulator is used as an evaporator.

[0051] In some embodiments, controlling the actions of a first throttle element, a second throttle element, a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, and a sixth control valve in a refrigeration system, as well as states of an outdoor heat exchanger, an indoor heat exchanger, and an accumulator according to a preset control strategy and based on an operating mode includes:

[0052] When the working mode is the supercooling release mode, the first control valve, the second control valve, the fourth control valve and the second throttle are controlled to be open, and the third control valve, the fifth control valve, the sixth control valve and the first throttle are controlled to be closed;

[0053] Among them, the indoor heat exchanger is used as an evaporator, the outdoor heat exchanger is used as a condenser, and the accumulator is used as a subcooler.

[0054] In some embodiments, controlling the actions of a first throttle element, a second throttle element, a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, and a sixth control valve in a refrigeration system, as well as states of an outdoor heat exchanger, an indoor heat exchanger, and an accumulator according to a preset control strategy and based on an operating mode includes:

[0055] When the working mode is the condensation and cooling mode, the first control valve, the third control valve and the fourth control valve are controlled to be open, and the second control valve, the fifth control valve, the sixth control valve, the first throttle element and the second throttle element are controlled to be closed;

[0056] The indoor heat exchanger is used as an evaporator, the outdoor heat exchanger is closed, and the accumulator is used as a condenser.

[0057] In some embodiments, controlling the actions of a first throttle element, a second throttle element, a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, and a sixth control valve in a refrigeration system, as well as states of an outdoor heat exchanger, an indoor heat exchanger, and an accumulator according to a preset control strategy and based on an operating mode includes:

[0058] When the working mode is the parallel cooling mode, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve and the second throttle are controlled to be open, and the sixth control valve and the first throttle are closed;

[0059] The indoor heat exchanger is used as an evaporator, and the outdoor heat exchanger and accumulator are used as condensers.

[0060] According to a fourth aspect of the present invention, there is provided a control method based on the above, comprising:

[0061] The state of the storage container is controlled to be a closed state, a refrigerant storage state or a refrigerant release state according to the refrigerant demand of the refrigeration system.

[0062] In some embodiments, controlling the state of the storage container to be closed, storing refrigerant, or releasing refrigerant according to the refrigerant demand of the refrigeration system includes:

[0063] A valve assembly is provided including a first throttle, a second control valve, a third control valve, a fifth control valve, a seventh control valve, an eighth control valve, a ninth control valve, a tenth control valve, a fourth throttle and a fifth throttle, wherein the first throttle is connected between the first port of the accumulator and the second control valve, the second control valve is arranged on the connecting pipeline between the outdoor heat exchanger and the first throttle, one end of the third control valve is connected to the connecting pipeline between the first throttle and the second control valve, the other end of the third control valve is connected to the connecting pipeline between the exhaust port of the compressor and the outdoor heat exchanger, one end of the fifth control valve is communicated with the indoor heat exchanger, the other end of the fifth control valve is connected to the connecting pipeline between the second control valve and the outdoor heat exchanger, the storage container has a first interface, a second interface and a third interface, the seventh control valve One end of the valve is connected to the first interface of the storage container, the other end of the seventh control valve is connected to the connecting pipeline between the fifth control valve and the outdoor heat exchanger, one end of the eighth control valve is connected to the second interface of the storage container, the other end of the eighth control valve is connected to the connecting pipeline between the air inlet of the compressor and the indoor heat exchanger, one end of the ninth control valve is connected to the third interface of the storage container, the other end of the ninth control valve is connected to the connecting pipeline between the air inlet of the compressor and the indoor heat exchanger, one end of the tenth control valve is connected to the second interface of the storage container, the other end of the tenth control valve is connected to the connecting pipeline between the third control valve and the outdoor heat exchanger, the fourth throttle element is connected between the ninth control valve and the third interface of the storage container, and the fifth throttle element is connected between the tenth control valve and the second interface of the storage container;

[0064] controlling the seventh control valve, the eighth control valve, the ninth control valve, and the tenth control valve to close so that the storage container enters a closed state;

[0065] Control the seventh control valve and the tenth control valve to open, and the eighth control valve and the ninth control valve to close, so that the storage container enters a refrigerant storage state; or

[0066] The eighth control valve and the ninth control valve are controlled to be open, and the seventh control valve and the tenth control valve are controlled to be closed, so that the storage container enters a refrigerant release state.

[0067] In some embodiments, controlling the state of the storage container to be closed, storing refrigerant, or releasing refrigerant according to the refrigerant demand of the refrigeration system includes:

[0068] A valve assembly is provided, comprising a first throttle member, a second control valve, a fifth control valve, an eleventh control valve, a twelfth control valve, and a sixth throttle member, wherein the first throttle member is connected between the first port of the accumulator and the second control valve, the second control valve is disposed on a connecting pipe between the outdoor heat exchanger and the first throttle member, one end of the fifth control valve is in communication with the indoor heat exchanger, and the other end of the fifth control valve is connected to the connecting pipe between the second control valve and the outdoor heat exchanger, the storage container comprises a fourth interface and a fifth interface, one end of the eleventh control valve is in communication with the fourth interface of the storage container, the other end of the eleventh control valve is connected to the connecting pipe between the fifth control valve and the outdoor heat exchanger, the twelfth control valve is connected between the fifth interface of the storage container and the sixth throttle member, and the other end of the sixth throttle member is connected to the connecting pipe between the air inlet of the compressor and the indoor heat exchanger;

[0069] controlling the eleventh control valve and the twelfth control valve to close, so that the storage container enters a closed state;

[0070] Controlling the eleventh control valve and the twelfth control valve to open so that the storage container enters a refrigerant storage state; or

[0071] The eleventh control valve is controlled to be closed and the twelfth control valve is controlled to be opened, so that the storage container enters a refrigerant release state.

[0072] According to a fifth aspect of the present invention, there is provided a control device for a refrigeration system, comprising:

[0073] a memory configured to store instructions;

[0074] The processor is coupled to the memory, and is configured to execute the above control method based on instructions stored in the memory.

[0075] According to a sixth aspect of the present invention, a computer-readable storage medium is provided, 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.

[0076] Based on the above technical solution, the embodiment of the present invention can change the flow direction of the refrigerant and / or adjust the on-off state of the connecting pipeline by operating the valve assembly to adjust the status of the outdoor heat exchanger, indoor heat exchanger and accumulator. Among them, the accumulator can be closed, store refrigerant or release refrigerant, so that the refrigeration system has multiple different refrigeration working modes to meet the diverse needs of users and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0078] Figure 1 This is a schematic structural diagram of an embodiment of a refrigeration system of the present invention.

[0079] Figure 2 Schematic diagram of refrigerant flow in a conventional refrigeration mode according to an embodiment of the refrigeration system of the present invention.

[0080] Figure 3 Schematic diagram of refrigerant flow in a complete cold storage mode of a refrigeration system according to an embodiment of the present invention.

[0081] Figure 4 The figure is a schematic diagram of the refrigerant flow in the refrigeration and cold storage mode of an embodiment of the refrigeration system of the present invention.

[0082] Figure 5 Schematic diagram of refrigerant flow in a supercooling release mode of a refrigeration system according to an embodiment of the present invention.

[0083] Figure 6 The figure is a schematic diagram of the refrigerant flow in the condensation cooling mode of an embodiment of the refrigeration system of the present invention.

[0084] Figure 7 Schematic diagram of refrigerant flow in parallel cooling mode of a refrigeration system according to an embodiment of the present invention.

[0085] Figure 8 Schematic diagram of the structure of the first alternative embodiment of the refrigeration system of the present invention.

[0086] Figure 9 Schematic diagram of the structure of a second alternative embodiment of the refrigeration system of the present invention.

[0087] Figure 10 Schematic diagram of the structure of a third alternative embodiment of the refrigeration system of the present invention.

[0088] Figure 11 Schematic diagram of the structure of a fourth alternative embodiment of the refrigeration system of the present invention.

[0089] In the picture:

[0090] 1. Outdoor unit; 2. Energy storage device; 3. Liquid side main pipe; 4. Gas side main pipe;

[0091] 101. Compressor; 102. Gas-liquid separator; 103. Subcooler; 104. Third throttling element; 105. Outdoor heat exchanger; 106. Second throttling element;

[0092] 201, accumulator; 201a, first port; 201b, second port; 202, first air pipe; 203, fifth control valve; 204, fourth control valve; 205, first liquid pipe; 206, first control valve; 207, first throttle element; 208, sixth control valve; 209, second liquid pipe; 210, third control valve; 211, second control valve; 212, second air pipe; 213, third liquid pipe; 214, liquid distributor;

[0093] 220, storage container; 220a, first interface; 220b, second interface; 220c, third interface; 220d, fourth interface; 220e, fifth interface; 221, seventh control valve; 222, eighth control valve; 223, ninth control valve; 224, tenth control valve; 225, fourth throttle element; 226, fifth throttle element; 227, eleventh control valve; 228, twelfth control valve; 229, sixth throttle element;

[0094] 301. Indoor heat exchanger. DETAILED DESCRIPTION

[0095] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0096] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0097] like Figure 1As shown, in some embodiments of the refrigeration system provided by the present invention, the refrigeration system includes a compressor 101, an outdoor heat exchanger 105, an indoor heat exchanger 301, an accumulator 201 and a valve assembly, the first port 201a of the accumulator 201 is respectively connected to the indoor heat exchanger 301 and the outdoor heat exchanger 105, and the second port 201b of the accumulator 201 is respectively connected to the indoor heat exchanger 301, the outdoor heat exchanger 105, the air inlet of the compressor 101 and the exhaust port of the compressor 101; the valve assembly is connected to the compressor 101, the outdoor heat exchanger 105, the indoor heat exchanger 301 and the accumulator 201, and the valve assembly is configured to control the flow direction of the refrigerant and / or the on-off of the connecting pipeline to adjust the status of the outdoor heat exchanger 105, the indoor heat exchanger 301 and the accumulator 201, and to realize the switching of the refrigeration system between different working modes, and the status of the accumulator 201 includes a non-working state, a cold storage state and a cold release state.

[0098] The above embodiment can change the flow direction of the refrigerant and / or adjust the on / off state of the connecting pipes by operating the valve assembly to adjust the status of the outdoor heat exchanger 105, the indoor heat exchanger 301 and the accumulator 201. Among them, the accumulator 201 can be closed, store refrigerant or release refrigerant, so that the refrigeration system has multiple different refrigeration working modes to meet the diverse needs of users and enhance the user experience.

[0099] In this embodiment of the present invention, accumulator 201 is filled with energy storage materials, such as ice water, organic phase change materials like paraffin, and inorganic phase change materials like sodium sulfate. Accumulator 201 is provided with a refrigerant pipeline, through which the refrigerant flows, exchanging heat with the energy storage materials, thereby storing and releasing both cold and heat.

[0100] By switching the valve components, various working modes can be achieved, including conventional refrigeration, complete cold storage, refrigeration cold storage, supercooling cold release and condensation cold release.

[0101] In some embodiments, when the accumulator 201 is in a cold storage state, the flow direction of the refrigerant in the accumulator 201 is opposite to the flow direction of the refrigerant in the accumulator 201 when the accumulator 201 is in a cold release state.

[0102] When the accumulator 201 is in a cold storage state, the refrigerant flows from the first port 201a of the accumulator 201 to the second port 201b of the accumulator 201; when the accumulator 201 is in a cold release state, the refrigerant flows from the second port 201b of the accumulator 201 to the first port 201a of the accumulator 201.

[0103] That is, in some embodiments, the accumulator 201 is capable of bidirectional refrigerant flow, meaning that the refrigerant flows in opposite directions during the cold storage and cold release processes. Since the refrigerant temperature gradually increases during cold storage, the temperature of the energy storage material in the accumulator 201 also follows a distribution pattern from low to high at the end of cold storage. During cold release, the high-temperature refrigerant flows into the accumulator from the other end, in a direction opposite to that during cold storage, precisely aligning with the temperature distribution after cold storage. At this point, as the heat exchange with the energy storage material, which has a decreasing temperature distribution, is more complete, the resulting refrigerant temperature is lower, resulting in a better heat exchange effect.

[0104] In some embodiments, the ports for liquid inlet and outlet of the accumulator 201 (at Figure 1 In the embodiment shown, a liquid separator 214 is provided at the first port 201a), and the liquid separator 214 can be used to evenly distribute the refrigerant to each flow pipeline, thereby reducing the flow loss of the refrigerant during the flow process.

[0105] Another advantage of setting the flow direction of the refrigerant in the accumulator 201 when the accumulator 201 is in the cold storage state and the flow direction of the refrigerant in the accumulator 201 when the accumulator 201 is in the cold release state to be opposite is that, whether in the cold storage state or the cold release state, the liquid refrigerant can be made to enter and exit from one port of the accumulator 201, while the gaseous refrigerant can be made to enter and exit from the other port of the accumulator 201, thereby avoiding the situation where the same port sometimes enters and exits liquid refrigerant and sometimes enters and exits gaseous refrigerant. In this way, a liquid separator can be set at the inlet and outlet of the liquid refrigerant, and the liquid separator will not increase the pressure loss of the refrigerant flow due to the occasional entry and exit of gaseous refrigerant.

[0106] In some embodiments, the valve assembly includes a first control valve 206 , which is disposed on a connecting pipe between the first port 201 a of the accumulator 201 and the indoor heat exchanger 301 .

[0107] By providing the first control valve 206 , the connection and disconnection of the connecting pipeline between the first port 201 a of the accumulator 201 and the indoor heat exchanger 301 can be controlled.

[0108] In some embodiments, the first control valve 206 includes a first electrically controlled valve or a first one-way valve, and an inlet of the first one-way valve is in communication with the first port 201 a of the accumulator 201 .

[0109] When the first control valve 206 includes a first electrically controlled valve, the opening and closing or the opening size of the first control valve 206 can be actively controlled by electrical control, and the active controllability is better.

[0110] When the first control valve 206 includes a first one-way valve, the first one-way valve can be used to control the flow direction of the refrigerant in the connecting pipeline between the first port 201a of the accumulator 201 and the indoor heat exchanger 301 to prevent the refrigerant from flowing back.

[0111] In some embodiments, the valve assembly includes a first throttle member 207 , which is disposed on a connecting pipe between the first port 201 a of the accumulator 201 and the outdoor heat exchanger 105 .

[0112] Through the first throttle element 207 , the refrigerant flowing out of the outdoor heat exchanger 105 can be transformed in pressure by the first throttle element 207 before entering the accumulator 201 , thereby realizing the cold storage function of the accumulator 201 .

[0113] In some embodiments, the valve assembly further includes a second control valve 211 , which is disposed on a connecting pipeline between the outdoor heat exchanger 105 and the first throttling element 207 .

[0114] By providing the second control valve 211 , the connection and disconnection of the connecting pipeline between the outdoor heat exchanger 105 and the first throttling element 207 can be controlled.

[0115] In some embodiments, the second control valve 211 includes a second electrically controlled valve or a second one-way valve, and an inlet of the second one-way valve is connected to the outdoor heat exchanger 105 .

[0116] When the second control valve 211 includes a second electrically controlled valve, the opening and closing or the opening size of the second control valve 211 can be actively controlled by electrical control, and the active controllability is better.

[0117] When the second control valve 211 includes a second one-way valve, the second one-way valve can be used to control the flow direction of the refrigerant in the connecting pipeline between the outdoor heat exchanger 105 and the first throttling member 207 to prevent the refrigerant from flowing back.

[0118] In some embodiments, the valve assembly also includes a third control valve 210, one end of the third control valve 210 is connected to the connecting pipe between the first throttle member 207 and the second control valve 211, and the other end of the third control valve 210 is connected to the connecting pipe between the exhaust port of the compressor 101 and the outdoor heat exchanger 105.

[0119] Through the third control valve 210, the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 101 can be controlled to pass through the outdoor heat exchanger 105 and then enter the indoor heat exchanger 301 or the accumulator 201, or the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 101 can directly enter the accumulator 201.

[0120] In some embodiments, the valve assembly further includes a fourth control valve 204 , one end of which is in communication with the second port 201 b of the accumulator 201 , and the other end of which is in communication with the third control valve 210 and the second control valve 211 .

[0121] The fourth control valve 204 serves as an on-off valve for the cooling release function of the accumulator 201. When the fourth control valve 204 is opened, high-temperature and high-pressure gas enters the interior of the accumulator 201 from the second port 201b of the accumulator 201 for heat exchange, thereby realizing the cooling release function. When the fourth control valve 204 is closed, the refrigerant passes through the first throttle member 207 and then enters the interior of the accumulator 201 from the first port 201a of the accumulator 201 for heat exchange, thereby realizing the cooling storage function.

[0122] In some embodiments, the valve assembly includes a fifth control valve 203 , one end of which is connected to the indoor heat exchanger 301 , and the other end of the fifth control valve 203 is connected to the connecting pipe between the second control valve 211 and the outdoor heat exchanger 105 .

[0123] The fifth control valve 203 serves as a switch valve for determining whether the refrigerant enters the accumulator 201. When the fifth control valve 203 is open, the refrigerant from the outdoor unit can directly enter the indoor unit; when the fifth control valve 203 is closed, the refrigerant from the outdoor unit can enter the accumulator 201 for heat exchange and then enter the indoor unit or flow back to the compressor 101.

[0124] In some embodiments, the valve assembly includes a sixth control valve 208 , which is disposed on a connecting pipeline between the second port 201 b of the accumulator 201 and the air inlet of the compressor 101 .

[0125] By providing the sixth control valve 208 , the connection and disconnection of the connecting pipeline between the accumulator 201 and the air inlet of the compressor 101 can be controlled to control whether the refrigerant flowing through the accumulator 201 flows back to the compressor 101 .

[0126] In some embodiments, the valve assembly further includes a second throttle member 106 , which is connected to the connecting pipe between the outdoor heat exchanger 105 and the indoor heat exchanger 301 .

[0127] In some embodiments, the refrigeration system further includes a subcooler 103 disposed between the outdoor heat exchanger 105 and the indoor heat exchanger 301 , and the subcooler 103 is connected to the air inlet of the compressor 101 , and a second throttling device 106 is disposed between the outdoor heat exchanger 105 and the subcooler 103 .

[0128] In some embodiments, the valve assembly also includes a third throttle member 104, which is arranged between the second throttle member 106 and the subcooler 103, and the port of the subcooler 103 connected to the third throttle member 104 and the port of the subcooler 103 connected to the air inlet of the compressor 101 are connected through the internal pipeline of the subcooler 103.

[0129] In some embodiments, the valve assembly further includes a gas-liquid separator 102 , the outlet of the gas-liquid separator 102 being in communication with the air inlet of the compressor 101 . The inlet of the gas-liquid separator 102 may be in communication with the subcooler 103 or the indoor heat exchanger 301 .

[0130] In some embodiments, the valve assembly includes a first throttle 207, a second throttle 106, a first control valve 206, a second control valve 211, a third control valve 210, a fourth control valve 204, a fifth control valve 203, and a sixth control valve 208. The first throttle 207 is connected between the first port 201a of the accumulator 201 and the second control valve 211. The second throttle 106 is connected to the connecting pipe between the outdoor heat exchanger 105 and the indoor heat exchanger 301. The first control valve 206 is provided on the connecting pipe between the first port 201a of the accumulator 201 and the indoor heat exchanger 301. The second control valve 211 is provided on the connecting pipe between the outdoor heat exchanger 105 and the first throttle 207. The third control valve 210 is provided on the connecting pipe between the outdoor heat exchanger 105 and the first throttle 207. One end of the fifth control valve 203 is connected to the connecting pipeline between the first throttle member 207 and the second control valve 211, the other end of the third control valve 210 is connected to the connecting pipeline between the exhaust port of the compressor 101 and the outdoor heat exchanger 105, one end of the fourth control valve 204 is connected to the second port 201b of the accumulator 201, and the other end of the fourth control valve 204 is respectively connected to the third control valve 210 and the second control valve 211, one end of the fifth control valve 203 is connected to the indoor heat exchanger 301, and the other end of the fifth control valve 203 is connected to the connecting pipeline between the second control valve 211 and the outdoor heat exchanger 105, and the sixth control valve 208 is arranged on the connecting pipeline between the second port 201b of the accumulator 201 and the air inlet of the compressor 101.

[0131] In some embodiments, the refrigeration system also includes a storage container 220, which is fluidically connected to the compressor 101, the outdoor heat exchanger 105 and the indoor heat exchanger 301. The valve assembly is also configured to adjust the state of the storage container 220 by controlling the flow direction of the refrigerant and / or the on-off state of the connecting pipeline. The states of the storage container 220 include a closed state, a refrigerant storage state and a refrigerant release state.

[0132] By providing the storage container 220 , the storage container 220 can be opened or closed appropriately according to the refrigerant demand in the refrigeration system. When the storage container 220 is opened, the refrigerant can be stored or released.

[0133] In some embodiments, the valve assembly includes a first throttle 207, a second control valve 211, a third control valve 210, a fifth control valve 203, a seventh control valve 221, an eighth control valve 222, a ninth control valve 223 and a tenth control valve 224. The first throttle 207 is connected between the first port 201a of the accumulator 201 and the second control valve 211. The second control valve 211 is arranged on the connecting pipe between the outdoor heat exchanger 105 and the first throttle 207. One end of the third control valve 210 is connected to the connecting pipe between the first throttle 207 and the second control valve 211. The other end of the third control valve 210 is connected to the connecting pipe between the exhaust port of the compressor 101 and the outdoor heat exchanger 105. One end of the fifth control valve 203 is communicated with the indoor heat exchanger 301. The other end of the fifth control valve 203 is connected to the connecting pipe between the second control valve 211 and the outdoor heat exchanger 105. The storage container 220 has a first throttle 207. The first interface 220a, the second interface 220b and the third interface 220c, one end of the seventh control valve 221 is connected to the first interface 220a of the storage container 220, and the other end of the seventh control valve 221 is connected to the connecting pipeline between the fifth control valve 203 and the outdoor heat exchanger 105, one end of the eighth control valve 222 is connected to the second interface 220b of the storage container 220, and the other end of the eighth control valve 222 is connected to the connecting pipeline between the exhaust port of the compressor 101 and the third control valve 210, one end of the ninth control valve 223 is connected to the third interface 220c of the storage container 220, and the other end of the ninth control valve 223 is connected to the connecting pipeline between the air inlet of the compressor 101 and the indoor heat exchanger 301, one end of the tenth control valve 224 is connected to the second interface 220b of the storage container 220, and the other end of the tenth control valve 224 is connected to the connecting pipeline between the air inlet of the compressor 101 and the indoor heat exchanger 301.

[0134] In some embodiments, the valve assembly also includes a fourth throttle member 225 and a fifth throttle member 226, the fourth throttle member 225 is connected between the ninth control valve 223 and the third interface 220c of the storage container 220, and the fifth throttle member 226 is connected between the tenth control valve 224 and the second interface 220b of the storage container 220.

[0135] In some embodiments, the valve assembly includes a first throttle 207, a second control valve 211, a fifth control valve 203, an eleventh control valve 227, a twelfth control valve 228 and a sixth throttle 229, the first throttle 207 is connected between the first port 201a of the accumulator 201 and the second control valve 211, the second control valve 211 is provided on the connecting pipe between the outdoor heat exchanger 105 and the first throttle 207, one end of the fifth control valve 203 is communicated with the indoor heat exchanger 301, and the other end of the fifth control valve 203 is connected to the second control valve 211 and the outdoor heat exchanger. On the connecting pipeline between the heat exchanger 105, the storage container 220 includes a fourth interface 220d and a fifth interface 220e, one end of the eleventh control valve 227 is connected to the fourth interface 220d of the storage container 220, and the other end of the eleventh control valve 227 is connected to the connecting pipeline between the fifth control valve 203 and the outdoor heat exchanger 105, the twelfth control valve 228 is connected between the fifth interface 220e of the storage container 220 and the sixth throttling device 229, and the other end of the sixth throttling device 229 is connected to the connecting pipeline between the air inlet of the compressor 101 and the indoor heat exchanger 301.

[0136] In some embodiments of the refrigeration system provided by the present invention, the third control valve 210, the fourth control valve 204, the fifth control valve 203, the sixth control valve 208, the seventh control valve 221, the eighth control valve 222, the ninth control valve 223, the tenth control valve 224, the eleventh control valve 227 and the twelfth control valve 228 can be switch valves or proportional valves, etc.

[0137] In some embodiments of the refrigeration system provided by the present invention, the first throttle 207, the second throttle 106, and the third throttle 104 may be electronic expansion valves, etc. The fourth throttle 225, the fifth throttle 226, and the sixth throttle 229 may be capillaries, etc.

[0138] In some embodiments of the refrigeration system provided by the present invention, the storage container 220 can be a container capable of storing and releasing refrigerant, such as a liquid storage tank.

[0139] Storage container 220 is used to address the varying demands for circulating refrigerant in each refrigeration system operating mode. When the demand for circulating refrigerant is low, it can be stored in the storage container. When the demand for circulating refrigerant is high, it can be replenished by releasing the refrigerant stored in the storage container.

[0140] In unconventional refrigeration, the accumulator itself acts as an evaporator or condenser, and circulating refrigerant heat exchange is required; in conventional refrigeration, the circulating refrigerant does not pass through the accumulator, and the accumulator can store part of the refrigerant at this time. Moreover, the main function of the accumulator is to exchange heat, and its design volume is related to the heat exchange demand passing through the accumulator. The volume is limited, and the internal structure is all refrigerant pipes. Therefore, the amount of refrigerant stored and released by the accumulator is limited. Storage containers (such as liquid storage tanks) can be designed with a capacity based on the difference between the maximum demand circulation volume and the minimum demand circulation volume of the refrigeration system. They have greater advantages than accumulators, and can adjust the refrigerant volume required by different requirements through liquid inlet and discharge control, which is simpler and easier to operate.

[0141] The refrigeration system provided by the present invention can achieve at least six operating modes, including conventional refrigeration, full cold storage, cold storage, supercooling release, condensation release, and parallel release, by adjusting the state of the valve assembly. Furthermore, in each operating mode, the storage container 220 can be in a closed state, a refrigerant storage state, or a refrigerant release state to meet the different needs of users. This also broadens the scope of use of the refrigeration system and greatly improves the availability of the refrigeration system. Furthermore, the refrigeration system designed by the present invention has streamlined piping and lowers costs.

[0142] Based on the refrigeration systems in the above embodiments, the present invention further provides a control method for a refrigeration system, the method comprising:

[0143] Determine the operating mode of the refrigeration system;

[0144] According to a preset control strategy and based on the working mode, the actions of the valve components in the refrigeration system and the states of the outdoor heat exchanger 105, the indoor heat exchanger 301 and the accumulator 201 are controlled.

[0145] At present, in order to save electricity resources, many cities have adopted time-of-use electricity price policies. For example, during peak electricity consumption periods, electricity prices are higher, in order to increase people's awareness of saving electricity through increased costs; during low electricity consumption periods, electricity prices are lower, guiding people to use electricity resources in off-peak periods and avoid putting greater pressure on the power supply system.

[0146] To this end, in some embodiments, determining the operating mode of the refrigeration system includes:

[0147] During a period of high electricity prices, the refrigeration system is configured to operate in a mode in which the accumulator 201 is in a non-operating state or a cooling capacity releasing state.

[0148] During a period of low electricity prices in the power supply system, the operating mode of the refrigeration system is determined to be a mode in which the energy accumulator 201 is in a non-operating state or a cold storage state.

[0149] By determining the working mode of the refrigeration system according to the electricity price of the power supply system, the accumulator 201 can be used to store cold energy during periods of low electricity prices, and the refrigeration system can be set to a mode in which the accumulator 201 is in a non-working state or a cold energy releasing state during periods of high electricity prices. The cold energy stored in advance by the accumulator 201 can be used primarily or auxiliary to achieve the purpose of refrigeration, thereby reducing the working frequency of the compressor 101, reducing the power consumption of the refrigeration system during periods of high electricity prices, and reducing the economic pressure on users. It is also conducive to achieving peak power consumption and reducing the power supply pressure of the power supply system.

[0150] In some embodiments, the refrigeration system may determine the operating mode of the refrigeration system according to the current needs of the user, or may automatically determine the operating mode of the refrigeration system according to a pre-stored charging standard of the power supply system.

[0151] In some embodiments, determining the operating mode of the refrigeration system includes:

[0152] Detecting whether there is energy stored in the accumulator 201;

[0153] Determine the operating mode of the refrigeration system based on the test results.

[0154] In some embodiments, determining the operating mode of the refrigeration system according to the detection results includes:

[0155] When it is detected that there is no energy in the accumulator 201 , the operating mode of the refrigeration system is determined to be a mode corresponding to the accumulator 201 being in a non-operating state or a cold storage state.

[0156] When it is detected that energy is stored in the accumulator 201 , the operating mode of the refrigeration system can be determined according to demand to be a mode in which the accumulator 201 is in a non-operating state, a cold storage state, or a cold release state.

[0157] When the energy in the energy accumulator 201 is used, the remaining energy in the energy accumulator 201 is detected in real time. When it is detected that the remaining energy is close to zero, the use of the energy in the energy accumulator 201 is stopped.

[0158] Similarly, the same operations as those for the accumulator 201 can be applied to the storage container 220, such as:

[0159] When it is detected that there is no refrigerant in the storage container 220, the state of the storage container 220 is determined to be a closed state and a refrigerant storage state;

[0160] When it is detected that refrigerant is stored in the storage container 220 , the state of the storage container 220 can be determined as a closed state, a refrigerant storage state, or a refrigerant release state according to demand.

[0161] When the storage container 220 is in the refrigerant releasing state, the refrigerant remaining amount in the storage container 220 is detected in real time. When it is detected that the refrigerant remaining amount is close to zero, the refrigerant release is stopped.

[0162] Based on the refrigeration systems in the above embodiments, the present invention further provides a control method for a refrigeration system, the method comprising:

[0163] Determine the operating mode of the refrigeration system;

[0164] According to a preset control strategy and based on the working mode, the actions of the first throttling device 207, the second throttling device 106, the first control valve 206, the second control valve 211, the third control valve 210, the fourth control valve 204, the fifth control valve 203 and the sixth control valve 208 in the refrigeration system and the states of the outdoor heat exchanger 105, the indoor heat exchanger 301 and the accumulator 201 are controlled.

[0165] In some embodiments, controlling the actions of the first throttle member 207, the second throttle member 106, the first control valve 206, the second control valve 211, the third control valve 210, the fourth control valve 204, the fifth control valve 203, and the sixth control valve 208 in the refrigeration system, as well as the states of the outdoor heat exchanger 105, the indoor heat exchanger 301, and the accumulator 201 according to a preset control strategy and based on the working mode includes:

[0166] When the working mode is the normal cooling mode, the fifth control valve 203 and the second throttle member 106 are controlled to be open, and the first control valve 206, the second control valve 211, the third control valve 210, the fourth control valve 204, the sixth control valve 208 and the first throttle member 207 are closed;

[0167] The indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is closed.

[0168] In some embodiments, controlling the actions of the first throttle member 207, the second throttle member 106, the first control valve 206, the second control valve 211, the third control valve 210, the fourth control valve 204, the fifth control valve 203, and the sixth control valve 208 in the refrigeration system, as well as the states of the outdoor heat exchanger 105, the indoor heat exchanger 301, and the accumulator 201 according to a preset control strategy and based on the working mode includes:

[0169] When the working mode is the full cold storage mode, the second control valve 211, the sixth control valve 208, the first throttle 207 and the second throttle 106 are controlled to be open, and the first control valve 206, the third control valve 210, the fourth control valve 204 and the fifth control valve 203 are closed;

[0170] The indoor heat exchanger 301 is closed, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as an evaporator.

[0171] In some embodiments, controlling the actions of the first throttle member 207, the second throttle member 106, the first control valve 206, the second control valve 211, the third control valve 210, the fourth control valve 204, the fifth control valve 203, and the sixth control valve 208 in the refrigeration system, as well as the states of the outdoor heat exchanger 105, the indoor heat exchanger 301, and the accumulator 201 according to a preset control strategy and based on the working mode includes:

[0172] When the working mode is the refrigeration and cold storage mode, the second control valve 211, the fifth control valve 203, the sixth control valve 208, the first throttle 207 and the second throttle 106 are controlled to be open, and the first control valve 206, the third control valve 210 and the fourth control valve 204 are closed;

[0173] The indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as an evaporator.

[0174] In some embodiments, controlling the actions of the first throttle member 207, the second throttle member 106, the first control valve 206, the second control valve 211, the third control valve 210, the fourth control valve 204, the fifth control valve 203, and the sixth control valve 208 in the refrigeration system, as well as the states of the outdoor heat exchanger 105, the indoor heat exchanger 301, and the accumulator 201 according to a preset control strategy and based on the working mode includes:

[0175] When the working mode is the supercooling release mode, the first control valve 206, the second control valve 211, the fourth control valve 204 and the second throttle 106 are controlled to be open, and the third control valve 210, the fifth control valve 203, the sixth control valve 208 and the first throttle 207 are closed;

[0176] The indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is used as a condenser, and the accumulator 201 is used as a subcooler 103 .

[0177] In some embodiments, controlling the actions of the first throttle member 207, the second throttle member 106, the first control valve 206, the second control valve 211, the third control valve 210, the fourth control valve 204, the fifth control valve 203, and the sixth control valve 208 in the refrigeration system, as well as the states of the outdoor heat exchanger 105, the indoor heat exchanger 301, and the accumulator 201 according to a preset control strategy and based on the working mode includes:

[0178] When the working mode is the condensation release mode, the first control valve 206, the third control valve 210 and the fourth control valve 204 are controlled to be open, and the second control valve 211, the fifth control valve 203, the sixth control valve 208, the first throttle 207 and the second throttle 106 are closed;

[0179] The indoor heat exchanger 301 is used as an evaporator, the outdoor heat exchanger 105 is closed, and the accumulator 201 is used as a condenser.

[0180] In some embodiments, controlling the actions of the first throttle member 207, the second throttle member 106, the first control valve 206, the second control valve 211, the third control valve 210, the fourth control valve 204, the fifth control valve 203, and the sixth control valve 208 in the refrigeration system, as well as the states of the outdoor heat exchanger 105, the indoor heat exchanger 301, and the accumulator 201 according to a preset control strategy and based on the working mode includes:

[0181] When the working mode is the parallel cooling mode, the first control valve 206, the second control valve 211, the third control valve 210, the fourth control valve 204, the fifth control valve 203 and the second throttle member 106 are controlled to be open, and the sixth control valve 208 and the first throttle member 207 are closed;

[0182] The indoor heat exchanger 301 is used as an evaporator, and the outdoor heat exchanger 105 and the accumulator 201 are both used as condensers.

[0183] Based on the refrigeration systems in the above embodiments, the present invention further provides a control method for a refrigeration system, the method comprising:

[0184] The state of the storage container 220 is controlled to be a closed state, a refrigerant storage state, or a refrigerant release state according to the refrigerant demand of the refrigeration system.

[0185] In some embodiments, controlling the state of the storage container 220 to be closed, storing refrigerant, or releasing refrigerant according to the refrigerant demand of the refrigeration system includes:

[0186] A valve assembly is provided, including a first throttle 207, a second control valve 211, a third control valve 210, a fifth control valve 203, a seventh control valve 221, an eighth control valve 222, a ninth control valve 223, a tenth control valve 224, a fourth throttle 225, and a fifth throttle 226. The first throttle 207 is connected between the first port 201a of the accumulator 201 and the second control valve 211. The second control valve 211 is provided on the connecting pipe between the outdoor heat exchanger 105 and the first throttle 207. The third control valve 210 is provided on the connecting pipe between the outdoor heat exchanger 105 and the first throttle 207. One end of the fifth control valve 203 is connected to the connecting pipe between the second control valve 211 and the outdoor heat exchanger 105. One end of the fifth control valve 203 is connected to the connecting pipe between the second control valve 211 and the outdoor heat exchanger 105. The storage container 220 has a first port 220a, a second port 220b and a third port 220c. The seventh control valve 203 is connected to the connecting pipe between the exhaust port of the compressor 101 and the outdoor heat exchanger 105. One end of the seventh control valve 221 is connected to the first interface 220a of the storage container 220, the other end of the seventh control valve 221 is connected to the connecting pipeline between the fifth control valve 203 and the outdoor heat exchanger 105, one end of the eighth control valve 222 is connected to the second interface 220b of the storage container 220, the other end of the eighth control valve 222 is connected to the connecting pipeline between the air inlet of the compressor 101 and the indoor heat exchanger 301, one end of the ninth control valve 223 is connected to the third interface 220c of the storage container 220, and the other end of the ninth control valve 223 is connected to the third interface 220c of the storage container 220. One end of the tenth control valve 224 is connected to the connecting pipeline between the air inlet of the compressor 101 and the indoor heat exchanger 301, one end of the tenth control valve 224 is connected to the second port 220b of the storage container 220, and the other end of the tenth control valve 224 is connected to the connecting pipeline between the third control valve 210 and the outdoor heat exchanger 105. The fourth throttle member 225 is connected between the ninth control valve 223 and the third port 220c of the storage container 220, and the fifth throttle member 226 is connected between the tenth control valve 224 and the second port 220b of the storage container 220;

[0187] Control the seventh control valve 221, the eighth control valve 222, the ninth control valve 223 and the tenth control valve 224 to close, so that the storage container 220 enters a closed state;

[0188] Control the seventh control valve 221 and the tenth control valve 224 to be open, and the eighth control valve 222 and the ninth control valve 223 to be closed, so that the storage container 220 enters a refrigerant storage state; or

[0189] The eighth control valve 222 and the ninth control valve 223 are controlled to be open, and the seventh control valve 221 and the tenth control valve 224 are controlled to be closed, so that the storage container 220 enters a refrigerant release state.

[0190] In some embodiments, controlling the state of the storage container 220 to be closed, storing refrigerant, or releasing refrigerant according to the refrigerant demand of the refrigeration system includes:

[0191] A valve assembly is provided, including a first throttle 207, a second control valve 211, a fifth control valve 203, an eleventh control valve 227, a twelfth control valve 228, and a sixth throttle 229. The first throttle 207 is connected between the first port 201a of the accumulator 201 and the second control valve 211. The second control valve 211 is provided on a connecting pipe between the outdoor heat exchanger 105 and the first throttle 207. One end of the fifth control valve 203 is communicated with the indoor heat exchanger 301, and the other end of the fifth control valve 203 is connected between the second control valve 211 and the outdoor heat exchanger 105. 05, the storage container 220 includes a fourth port 220d and a fifth port 220e, one end of the eleventh control valve 227 is in communication with the fourth port 220d of the storage container 220, the other end of the eleventh control valve 227 is connected to the connecting pipe between the fifth control valve 203 and the outdoor heat exchanger 105, the twelfth control valve 228 is connected between the fifth port 220e of the storage container 220 and the sixth throttle member 229, the other end of the sixth throttle member 229 is connected to the connecting pipe between the air inlet of the compressor 101 and the indoor heat exchanger 301;

[0192] Controlling the eleventh control valve 227 and the twelfth control valve 228 to close, so that the storage container 220 enters a closed state;

[0193] Control the eleventh control valve 227 and the twelfth control valve 228 to open, so that the storage container 220 enters the refrigerant storage state; or

[0194] The eleventh control valve 227 is controlled to be closed, and the twelfth control valve 228 is controlled to be open, so that the storage container 220 enters a refrigerant release state.

[0195] The present invention also provides a control device for a refrigeration system, comprising:

[0196] a memory configured to store instructions;

[0197] The processor is coupled to the memory, and is configured to execute the above control method based on instructions stored in the memory.

[0198] The present invention also 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.

[0199] The following is combined with Figures 1 to 10 The working process of the refrigeration system provided by the present invention is described as follows:

[0200] like Figure 1 As shown, the refrigeration system includes an outdoor unit 1, an energy storage device 2 and an indoor unit.

[0201] The outdoor unit 1 includes a compressor 101 , a gas-liquid separator 102 , a subcooler 103 , a third throttle element 104 , an outdoor heat exchanger 105 , and a second throttle element 106 .

[0202] The exhaust port of the compressor 101 is connected to the inlet of the outdoor heat exchanger 105, the outlet of the outdoor heat exchanger 105 is connected to the inlet of the second throttling device 106, and the outlet of the second throttling device 106 is divided into two paths, one path is connected to the energy storage device 2 through the cooler 103, and the other path is connected to the inlet of the third throttling device 104. The outlet of the third throttling device 104 is connected to the inlet of the gas-liquid separator 102 through the cooler 103, and the outlet of the gas-liquid separator 102 is connected to the air inlet of the compressor 101.

[0203] There are only three connecting pipes between the outdoor unit 1 and the energy storage device 2.

[0204] The first connection port of the energy storage device 2 is connected to the connection pipeline between the exhaust port of the compressor 101 and the outdoor heat exchanger 105 , the second connection port is connected to the subcooler 103 , and the third connection port is connected to the connection pipeline between the subcooler 103 and the gas-liquid separator 102 .

[0205] The energy storage device 2 includes an accumulator 201, a first air pipe 202, a fifth control valve 203, a fourth control valve 204, a first liquid pipe 205, a first control valve 206, a first throttle 207, a sixth control valve 208, a second liquid pipe 209, a third control valve 210, a second control valve 211, a second air pipe 212, a third liquid pipe 213 and a liquid distributor 214.

[0206] The accumulator 201 includes a first port 201 a and a second port 201 b . The first port 201 a is located at the top of the accumulator 201 , and the second port 201 b is located at the bottom of the accumulator 201 .

[0207] 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.

[0208] A liquid distributor 214 is provided at the first port 201a of the accumulator 201, which can evenly distribute the refrigerant to each circulation pipeline, thereby reducing the flow loss of the refrigerant during the flow process.

[0209] The first port 201a of the accumulator 201 is connected to the exhaust port of the compressor 101 via a first gas pipe 202, is connected to the liquid-side manifold 3 via a first liquid pipe 205, and is further connected to the liquid-side manifold 3 via a third liquid pipe 213. The second end 201b of the accumulator 201 is connected to the gas-side manifold 4 via a second gas pipe 212, and is further connected to the first liquid pipe 205 via a second liquid pipe 209. A first throttling member 207 is arranged at the first port 201a of the accumulator 201, a third control valve 210 is arranged on the first air pipe 202, a second control valve 211 is arranged on the first liquid pipe 205, a first control valve 206 is arranged on the third liquid pipe 213, a sixth control valve 208 is arranged on the second air pipe 212, a fourth control valve 204 is arranged on the second liquid pipe 209, and a fifth control valve 203 is also arranged between the node of the first liquid pipe 205 and the liquid side main pipe 3 and the node of the third liquid pipe 213 and the liquid side main pipe 3.

[0210] This embodiment provides a multifunctional energy storage refrigeration system that can provide energy storage and release services for a variety of different power load transfer scenarios.

[0211] By switching the valve components, various working modes can be achieved, including conventional refrigeration, complete cold storage, refrigeration cold storage, supercooling cold release and condensation cold release.

[0212] Refer to Table 1, which shows the correspondence between each working mode and the status of each component in the valve assembly and the status of the heat exchanger.

[0213] Table 1 Correspondence between working mode, valve status and heat exchanger status

[0214]

[0215] like Figure 2 As shown, in normal cooling mode:

[0216] The fifth control valve 203 and the second throttle element 106 are opened, and the third control valve 210 , the fourth control valve 204 , the sixth control valve 208 and the first throttle element 207 are closed.

[0217] The refrigerant discharged from compressor 101 flows through outdoor heat exchanger 105 and enters the indoor unit through liquid header 3. After evaporation in the indoor unit, it returns to the suction side of compressor 101 through gas header 4 and gas-liquid separator 102. At this time, accumulator 201 is not used, and only the normal refrigeration cycle function is realized.

[0218] like Figure 3 As shown, in full cold storage mode:

[0219] The sixth control valve 208 , the first throttle element 207 and the second throttle element 106 are opened, and the third control valve 210 , the fourth control valve 204 and the fifth control valve 203 are closed.

[0220] The refrigerant discharged from compressor 101 condenses in outdoor heat exchanger 105 and enters liquid-side manifold 3. After passing through first liquid pipe 205 and being throttled at first throttle element 207, it enters accumulator 201 for evaporation. It then returns to gas-liquid separator 102 and the suction side of compressor 101 via second gas pipe 212 and gas-side manifold 4. In this mode, accumulator 201 acts as the evaporator and outdoor heat exchanger 105 acts as the condenser. In this mode, two-phase refrigerant enters accumulator 201 from first end 201a through liquid separator 214. After evaporation, the gaseous refrigerant exits from second end 201b of accumulator 201.

[0221] like Figure 4 As shown, in cooling and cold storage mode:

[0222] The fifth control valve 203 , the sixth control valve 208 , the first throttle element 207 and the second throttle element 106 are opened, and the third control valve 210 and the fourth control valve 204 are closed.

[0223] The refrigerant discharged from compressor 101 condenses in outdoor heat exchanger 105 and enters liquid-side manifold 3, where it splits into two paths. One path enters accumulator 201 through first liquid pipe 205 and first throttle element 207, evaporates, and flows into second gas pipe 212. The other path enters indoor heat exchanger 301 for evaporation. The two paths merge at the inlet of gas-liquid separator 102 and return to the suction side of compressor 101. Accumulator 201 and indoor heat exchanger 301 simultaneously function as evaporators, with accumulator 201 storing cold and indoor heat exchanger 301 providing cooling to the indoor space. In this scenario, the two-phase refrigerant enters accumulator 201 from first end 201a through liquid separator 214 and evaporates as a gaseous refrigerant that flows out of accumulator 201 from second end 201b.

[0224] like Figure 5 As shown, in the supercooling release mode:

[0225] The fourth control valve 204 and the second throttle element 106 are opened, and the third control valve 210 , the fifth control valve 203 , the sixth control valve 208 and the first throttle element 207 are closed.

[0226] The refrigerant discharged from the compressor 101 flows through the outdoor heat exchanger 105, then through the liquid-side manifold 3 and the second liquid pipe 209 into the accumulator 201. After being subcooled, it flows through the third liquid pipe 213 and the liquid-side manifold 3, flows into the indoor unit for evaporation, and then returns to the suction side of the compressor 101 through the gas-side manifold 4 and the gas-liquid separator 102. The accumulator 201 acts as a subcooler, releasing cooling energy to the refrigerant condensed in the outdoor heat exchanger 105, further increasing its subcooling before flowing into the indoor unit for evaporation, thereby increasing the refrigerant's cooling capacity. Liquid refrigerant enters the accumulator 201 through the second end 201b and exits through the first end 201a through the liquid separator 214.

[0227] like Figure 6 As shown, in condensation cooling mode:

[0228] The third control valve 210 and the fourth control valve 204 are opened, and the fifth control valve 203, the sixth control valve 208, the first throttle element 207 and the second throttle element 106 are closed.

[0229] The refrigerant discharged from the compressor 101 enters the accumulator 201 through the first gas pipe 202 and the second liquid pipe 209 for condensation, flows into the indoor unit through the third liquid pipe 213 and the liquid side main pipe 3 for evaporation, and returns to the suction side of the compressor 101 through the gas side main pipe 4 and the gas-liquid separator 102. This mode does not use 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 much lower than the outdoor ambient temperature, the refrigeration cycle can operate under low pressure ratio conditions, greatly reducing the load on the compressor 101. At this time, the gaseous refrigerant enters from the second end 201b of the accumulator 201, and the liquid refrigerant flows out from the first end 201a through the liquid separator 214.

[0230] like Figure 7 As shown, in parallel cooling mode:

[0231] The second throttle element 106 , the fifth control valve 203 , the fourth control valve 204 and the third control valve 210 are opened, and the first throttle element 207 and the sixth control valve 208 are closed.

[0232] The refrigerant discharged from the compressor 101 is divided into two paths. The first path enters the accumulator 201 through the first gas pipe 202 and the second liquid pipe 209 for condensation, then flows through the third liquid pipe 213 and the liquid-side main pipe 3. The second path flows through the outdoor heat exchanger 105, condenses, enters the liquid-side main pipe 3 and merges with the first path, flows into the indoor unit for evaporation, passes through the gas-side main pipe 4 and the gas-liquid separator 102, and returns to the suction side of the compressor 101. This mode uses both the outdoor heat exchanger 105 and the accumulator 201 as condensers and can be used in scenarios with high condensing loads. In this case, the gaseous refrigerant enters the accumulator 201 from the second end 201b, and the liquid refrigerant flows out from the first end 201a through the liquid separator 214.

[0233] When the electricity price is low, the energy storage equipment uses full cold storage or cooling and cold storage mode to store cold; when the electricity price is at its peak, the energy storage equipment uses supercooling release mode to release cold, which can provide energy for the system, reduce the operating frequency of the compressor, reduce power consumption, and reduce operating costs.

[0234] 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 as the outdoor heat exchanger instead of the outdoor heat exchanger as the condenser. 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.

[0235] When the system has a cooling demand of low energy consumption and high condensing capacity, the parallel cooling function can be used, that is, the outdoor heat exchanger and accumulator are used for condensation at the same time, so as to achieve the purpose of reducing energy consumption while increasing condensing capacity.

[0236] exist Figures 2 to 7 In the illustrated embodiment, both the first control valve 206 and the second control valve 211 are one-way valves, and therefore, there is no need to control the opening and closing states of the first control valve 206 and the second control valve 211 .

[0237] like Figure 8 As shown, in a first alternative embodiment:

[0238] The first control valve 206 is a solenoid valve to ensure stricter control of the flow path.

[0239] As shown in Table 1, in the conventional cooling mode, the complete cold storage mode and the cooling cold storage mode, the first control valve 206 is closed; in the supercooling release mode and the condensing release mode, the first control valve 206 is open.

[0240] like Figure 9 As shown, in a second alternative embodiment:

[0241] The second control valve 211 is a solenoid valve to ensure stricter control of the flow path.

[0242] As shown in Table 1, in the normal cooling mode and the condensing cold release mode, the second control valve 211 is closed; in the cooling cold storage mode, the complete cold storage mode and the supercooling cold release mode, the second control valve 211 is open.

[0243] like Figure 10 As shown, in a third alternative embodiment:

[0244] The refrigeration system further includes a storage container 220 , a seventh control valve 221 , an eighth control valve 222 , a ninth control valve 223 , a tenth control valve 224 , a fourth throttle 225 , and a fifth throttle 226 .

[0245] The storage container 220 has a first interface 220a, a second interface 220b, and a third interface 220c. The first interface 220a and the second interface 220b are both located at the top of the storage container 220, and the third interface 220c is located at the lower left side of the storage container 220.

[0246] One end of the seventh control valve 221 communicates with the first port 220a of the storage container 220, and the other end of the seventh control valve 221 is connected to the connecting pipe between the fifth control valve 203 and the outdoor heat exchanger 105. One end of the eighth control valve 222 communicates with the second port 220b of the storage container 220, and the other end of the eighth control valve 222 is connected to the connecting pipe between the air inlet of the compressor 101 and the indoor heat exchanger 301. One end of the ninth control valve 223 communicates with one end of the fourth throttle member 225, and the other end of the fourth throttle member 225 communicates with the third port 220c of the storage container 220. The other end of the ninth control valve 223 is connected to the connecting pipe between the air inlet of the compressor 101 and the indoor heat exchanger 301. One end of the tenth control valve 224 is connected to one end of the fifth throttle member 226, the other end of the fifth throttle member 226 is connected to the second interface 220b of the storage container 220, and the other end of the tenth control valve 224 is connected to the connecting pipeline between the third control valve 210 and the outdoor heat exchanger 105.

[0247] In such Figures 2 to 7 On the basis of the refrigeration system embodiment shown, a storage container 220 with a liquid storage function is added. By storing and releasing the refrigerant through the storage container 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.

[0248] The storage container 220 has three states: not working, storing refrigerant and releasing refrigerant. These three states can be used in different system modes such as conventional cooling and full cold storage.

[0249] When the storage container 220 is not in operation, the seventh control valve 221 , the eighth control valve 222 , the ninth control valve 223 , and the tenth control valve 224 are all closed.

[0250] When it is determined that the current operating mode requires storage container 220 to be activated for refrigerant storage, seventh control valve 221 and tenth control valve 224 are opened, while eighth control valve 222 and ninth control valve 223 are closed. Opening tenth control valve 224 places the tank pressure of storage container 220 at a low pressure, while opening seventh control valve 221 places the refrigerant inlet pipe of storage container 220 at a medium pressure. Refrigerant enters storage container 220 under the influence of the pressure differential.

[0251] When it is determined that the current operating mode requires the storage container 220 to be activated to release refrigerant, the seventh control valve 221 and the tenth control valve 224 are closed, and the eighth control valve 222 and the ninth control valve 223 are opened. The ninth control valve 223 is opened, placing the outlet of the storage container 220 at a low pressure, while the eighth control valve 222 is opened, placing the pressure inside the storage container 220 at a high pressure. The refrigerant inside the tank is discharged from the tank under the action of gravity and the pressure differential, entering the pipeline circulation.

[0252] like Figure 11 As shown, in a fourth alternative embodiment:

[0253] This embodiment is also in Figures 2 to 7 The storage container 220 is added to the refrigeration system embodiment shown in FIG. 1 , but the storage container 220 is arranged in the same manner as in FIG. Figure 10 The embodiments shown are different.

[0254] In this embodiment, the storage container 220 has two interfaces, namely a fourth interface 220d and a fifth interface 220e. The fourth interface 220d is located at the lower left portion of the storage container 220, and the fifth interface 220e is located at the upper right portion of the storage container 220.

[0255] One end of the eleventh control valve 227 is connected to the fourth port 220d of the storage container 220, and the other end of the eleventh control valve 227 is connected to the connecting pipeline between the fifth control valve 203 and the outdoor heat exchanger 105. The twelfth control valve 228 is connected between the fifth port 220e of the storage container 220 and one end of the sixth throttle member 229, and the other end of the sixth throttle member 229 is connected to the connecting pipeline between the air inlet of the compressor 101 and the indoor heat exchanger 301.

[0256] In this embodiment, the storage container 220 has three states: not working, storing refrigerant, and releasing refrigerant. These three states can be used in different system modes such as conventional cooling and full cold storage.

[0257] When the storage container 220 is not in operation, the eleventh control valve 227 and the twelfth control valve 228 are both closed.

[0258] When it is determined that the current operation mode requires starting the storage container 220 to store refrigerant, the eleventh control valve 227 and the twelfth control valve 228 are both opened, and the refrigerant enters the storage container 220 under the action of the pressure difference.

[0259] When it is determined that the current operating mode requires starting the storage container 220 to release the refrigerant, the twelfth control valve 228 is closed and the eleventh control valve 227 is opened. The refrigerant inside the tank is discharged from the tank under the action of gravity and pressure difference and enters the pipeline circulation.

[0260] The refrigeration system embodiment provided by the present invention can store energy during off-peak electricity price periods and release energy during peak electricity price periods, thereby reducing the power consumption of the air conditioner at this time, realizing "peak shaving and valley filling" of electricity, and reducing the operating cost of the air conditioner; the single-cooling refrigeration system can also realize six functions such as cold storage and cold release through the switching of pipelines and valves, broadening the scope of use of the energy storage system and improving the availability of the energy storage system; by setting the accumulator for two-way refrigerant inlet, it can not only ensure the uniform liquid separation when the liquid refrigerant enters the accumulator, but also reduce the pressure loss when the gaseous refrigerant enters the accumulator.

[0261] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, ordinary technicians in the field should understand that without departing from the principles of the present invention, the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents. These modifications and equivalent replacements should all be included in the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A refrigeration system, characterized in that: include: compressor (101); outdoor heat exchanger (105); Indoor heat exchanger (301); An accumulator (201), wherein a first port (201a) of the accumulator (201) is respectively connected to the indoor heat exchanger (301) and the outdoor heat exchanger (105), and a second port (201b) of the accumulator (201) is respectively connected to the indoor heat exchanger (301), the outdoor heat exchanger (105), an air inlet of the compressor (101), and an exhaust port of the compressor (101), and when the accumulator (201) is in a state of storing cold energy, the flow direction of the refrigerant in the accumulator (201) is opposite to the flow direction of the refrigerant in the accumulator (201) when the accumulator (201) is in a state of releasing cold energy; and The valve assembly is connected to the compressor (101), the outdoor heat exchanger (105), the indoor heat exchanger (301) and the accumulator (201). The valve assembly is configured to control the flow direction of the refrigerant and / or the on-off of the connecting pipeline to adjust the state of the outdoor heat exchanger (105), the indoor heat exchanger (301) and the accumulator (201), and realize the switching of the refrigeration system between different working modes. The state of the accumulator (201) includes a non-working state, a cold storage state and a cold release state. The valve assembly includes a first throttling member (207), a second throttling member (208), and a second throttling member (209). A throttling element (106), a first control valve (206), a second control valve (211), a third control valve (210), a fourth control valve (204), a fifth control valve (203) and a sixth control valve (208); the first throttling element (207) is connected between the first port (201a) of the accumulator (201) and the second control valve (211); the second throttling element (106) is connected to the connecting pipeline between the outdoor heat exchanger (105) and the indoor heat exchanger (301); the first control valve (206) is provided at the first port (201a) of the accumulator (201); 01a) and the indoor heat exchanger (301), the second control valve (211) is provided on the connecting pipeline between the outdoor heat exchanger (105) and the first throttling element (207), one end of the third control valve (210) is connected to the connecting pipeline between the first throttling element (207) and the second control valve (211), the other end of the third control valve (210) is connected to the connecting pipeline between the exhaust port of the compressor (101) and the outdoor heat exchanger (105), one end of the fourth control valve (204) is connected to the accumulator (20 1), the other end of the fourth control valve (204) is respectively communicated with the third control valve (210) and the second control valve (211), one end of the fifth control valve (203) is communicated with the indoor heat exchanger (301), the other end of the fifth control valve (203) is connected to the connecting pipeline between the second control valve (211) and the outdoor heat exchanger (105), and the sixth control valve (208) is provided on the connecting pipeline between the second port (201b) of the accumulator (201) and the air inlet of the compressor (101).

2. The refrigeration system according to claim 1, characterized in that The invention also includes a subcooler (103) arranged between the outdoor heat exchanger (105) and the indoor heat exchanger (301), and the subcooler (103) is connected to the air inlet of the compressor (101), and the second throttling element (106) is arranged between the outdoor heat exchanger (105) and the subcooler (103).

3. The refrigeration system according to claim 2, characterized in that The valve assembly further includes a third throttle member (104), which is arranged between the second throttle member (106) and the subcooler (103), and a port of the subcooler (103) connected to the third throttle member (104) and a port of the subcooler (103) connected to the air inlet of the compressor (101) are connected through an internal pipeline of the subcooler (103).

4. The refrigeration system according to any one of claims 1 to 3, characterized in that: The system further includes a storage container (220), wherein the storage container (220) is in fluid communication with the compressor (101), the outdoor heat exchanger (105), and the indoor heat exchanger (301). The valve assembly is further configured to adjust the state of the storage container (220) by controlling the flow direction of the refrigerant and / or the on-off state of the connecting pipeline. The states of the storage container (220) include a closed state, a refrigerant storage state, and a refrigerant release state.

5. The refrigeration system according to claim 4, characterized in that The valve assembly comprises a seventh control valve (221), an eighth control valve (222), a ninth control valve (223) and a tenth control valve (224); the storage container (220) has a first interface (220a), a second interface (220b) and a third interface (220c); one end of the seventh control valve (221) is in communication with the first interface (220a) of the storage container (220); the other end of the seventh control valve (221) is connected to the connecting pipeline between the fifth control valve (203) and the outdoor heat exchanger (105); one end of the eighth control valve (222) is in communication with the second interface (220b) of the storage container (220); and the eighth control valve ( The other end of the ninth control valve (222) is connected to the connecting pipeline between the exhaust port of the compressor (101) and the third control valve (210), one end of the ninth control valve (223) is communicated with the third interface (220c) of the storage container (220), and the other end of the ninth control valve (223) is connected to the connecting pipeline between the air inlet of the compressor (101) and the indoor heat exchanger (301), one end of the tenth control valve (224) is communicated with the second interface (220b) of the storage container (220), and the other end of the tenth control valve (224) is connected to the connecting pipeline between the air inlet of the compressor (101) and the indoor heat exchanger (301).

6. The refrigeration system according to claim 5, characterized in that The valve assembly further comprises a fourth throttle member (225) and a fifth throttle member (226), wherein the fourth throttle member (225) is connected between the ninth control valve (223) and the third interface (220c) of the storage container (220), and the fifth throttle member (226) is connected between the tenth control valve (224) and the second interface (220b) of the storage container (220).

7. The refrigeration system according to claim 4, characterized in that The valve assembly comprises an eleventh control valve (227), a twelfth control valve (228) and a sixth throttle member (229); the first throttle member (207) is connected between the first port (201a) of the accumulator (201) and the second control valve (211); the storage container (220) comprises a fourth interface (220d) and a fifth interface (220e); one end of the eleventh control valve (227) is connected to the fourth interface (220d) of the storage container (220); and the fifth interface (220e) is connected to the first port (201a) of the storage container (220). 0d), the other end of the eleventh control valve (227) is connected to the connecting pipeline between the fifth control valve (203) and the outdoor heat exchanger (105), the twelfth control valve (228) is connected between the fifth interface (220e) of the storage container (220) and the sixth throttling element (229), and the other end of the sixth throttling element (229) is connected to the connecting pipeline between the air inlet of the compressor (101) and the indoor heat exchanger (301).

8. A control method for a refrigeration system according to any one of claims 1 to 7, characterized in that: include: determining an operating mode of the refrigeration system; According to a preset control strategy and based on the working mode, the actions of the valve components in the refrigeration system and the states of the outdoor heat exchanger (105), the indoor heat exchanger (301) and the accumulator (201) are controlled.

9. The control method according to claim 8, characterized in that: Determining the operating mode of the refrigeration system includes: During a period when the power supply system has a high electricity price, determining the operating mode of the refrigeration system to be a mode corresponding to the accumulator (201) being in a non-operating state or a cooling capacity releasing state; During a period when the power supply system has a low electricity price, the operating mode of the refrigeration system is determined to be a mode corresponding to the accumulator (201) being in a non-operating state or a cold storage state.

10. The control method according to claim 8, characterized in that: Determining the operating mode of the refrigeration system includes: Detecting whether energy is stored in the energy accumulator (201); The operating mode of the refrigeration system is determined according to the detection result.

11. A control method for a refrigeration system according to any one of claims 1 to 7, characterized in that: include: determining an operating mode of the refrigeration system; According to a preset control strategy and based on the working mode, the actions of the first throttle member (207), the second throttle member (106), the first control valve (206), the second control valve (211), the third control valve (210), the fourth control valve (204), the fifth control valve (203) and the sixth control valve (208) in the refrigeration system and the states of the outdoor heat exchanger (105), the indoor heat exchanger (301) and the accumulator (201) are controlled.

12. The control method according to claim 11, characterized in that: Controlling the actions of the first throttle element (207), the second throttle element (106), the first control valve (206), the second control valve (211), the third control valve (210), the fourth control valve (204), the fifth control valve (203), and the sixth control valve (208) in the refrigeration system, as well as the states of the outdoor heat exchanger (105), the indoor heat exchanger (301), and the accumulator (201) according to a preset control strategy and based on the working mode includes: When the working mode is a conventional refrigeration mode, the fifth control valve (203) and the second throttle member (106) are controlled to be open, and the first control valve (206), the second control valve (211), the third control valve (210), the fourth control valve (204), the sixth control valve (208) and the first throttle member (207) are controlled to be closed; The indoor heat exchanger (301) is used as an evaporator, the outdoor heat exchanger (105) is used as a condenser, and the accumulator (201) is closed.

13. The control method according to claim 11, characterized in that: Controlling the actions of the first throttle element (207), the second throttle element (106), the first control valve (206), the second control valve (211), the third control valve (210), the fourth control valve (204), the fifth control valve (203), and the sixth control valve (208) in the refrigeration system, as well as the states of the outdoor heat exchanger (105), the indoor heat exchanger (301), and the accumulator (201) according to a preset control strategy and based on the working mode includes: When the working mode is the full cold storage mode, the second control valve (211), the sixth control valve (208), the first throttle member (207) and the second throttle member (106) are controlled to be open, and the first control valve (206), the third control valve (210), the fourth control valve (204) and the fifth control valve (203) are controlled to be closed; The indoor heat exchanger (301) is closed, the outdoor heat exchanger (105) is used as a condenser, and the accumulator (201) is used as an evaporator.

14. The control method according to claim 11, characterized in that: Controlling the actions of the first throttle element (207), the second throttle element (106), the first control valve (206), the second control valve (211), the third control valve (210), the fourth control valve (204), the fifth control valve (203), and the sixth control valve (208) in the refrigeration system, as well as the states of the outdoor heat exchanger (105), the indoor heat exchanger (301), and the accumulator (201) according to a preset control strategy and based on the working mode includes: When the working mode is the refrigeration and cold storage mode, the second control valve (211), the fifth control valve (203), the sixth control valve (208), the first throttle member (207) and the second throttle member (106) are controlled to be open, and the first control valve (206), the third control valve (210) and the fourth control valve (204) are controlled to be closed; The indoor heat exchanger (301) is used as an evaporator, the outdoor heat exchanger (105) is used as a condenser, and the accumulator (201) is used as an evaporator.

15. The control method according to claim 11, characterized in that: Controlling the actions of the first throttle element (207), the second throttle element (106), the first control valve (206), the second control valve (211), the third control valve (210), the fourth control valve (204), the fifth control valve (203), and the sixth control valve (208) in the refrigeration system, as well as the states of the outdoor heat exchanger (105), the indoor heat exchanger (301), and the accumulator (201) according to a preset control strategy and based on the working mode includes: When the working mode is the supercooling release mode, the first control valve (206), the second control valve (211), the fourth control valve (204) and the second throttle member (106) are controlled to be open, and the third control valve (210), the fifth control valve (203), the sixth control valve (208) and the first throttle member (207) are controlled to be closed; The indoor heat exchanger (301) is used as an evaporator, the outdoor heat exchanger (105) is used as a condenser, and the accumulator (201) is used as a subcooler (103).

16. The control method according to claim 11, characterized in that: Controlling the actions of the first throttle element (207), the second throttle element (106), the first control valve (206), the second control valve (211), the third control valve (210), the fourth control valve (204), the fifth control valve (203), and the sixth control valve (208) in the refrigeration system, as well as the states of the outdoor heat exchanger (105), the indoor heat exchanger (301), and the accumulator (201) according to a preset control strategy and based on the working mode includes: When the working mode is the condensation release mode, the first control valve (206), the third control valve (210) and the fourth control valve (204) are controlled to be open, and the second control valve (211), the fifth control valve (203), the sixth control valve (208), the first throttle element (207) and the second throttle element (106) are controlled to be closed; The indoor heat exchanger (301) is used as an evaporator, the outdoor heat exchanger (105) is closed, and the accumulator (201) is used as a condenser.

17. The control method according to claim 11, characterized in that: Controlling the actions of the first throttle element (207), the second throttle element (106), the first control valve (206), the second control valve (211), the third control valve (210), the fourth control valve (204), the fifth control valve (203), and the sixth control valve (208) in the refrigeration system, as well as the states of the outdoor heat exchanger (105), the indoor heat exchanger (301), and the accumulator (201) according to a preset control strategy and based on the working mode includes: When the working mode is the parallel cooling mode, the first control valve (206), the second control valve (211), the third control valve (210), the fourth control valve (204), the fifth control valve (203) and the second throttle member (106) are controlled to be open, and the sixth control valve (208) and the first throttle member (207) are controlled to be closed; The indoor heat exchanger (301) is used as an evaporator, and the outdoor heat exchanger (105) and the accumulator (201) are both used as condensers.

18. A control method for a refrigeration system according to any one of claims 4 to 7, characterized in that: include: The state of the storage container (220) is controlled to be a closed state, a refrigerant storage state, or a refrigerant release state according to the refrigerant demand of the refrigeration system.

19. The control method according to claim 18, characterized in that: Controlling the state of the storage container (220) to be a closed state, a refrigerant storage state, or a refrigerant release state according to the refrigerant demand of the refrigeration system includes: A valve assembly is provided, comprising a first throttle member (207), a second control valve (211), a third control valve (210), a fifth control valve (203), a seventh control valve (221), an eighth control valve (222), a ninth control valve (223), a tenth control valve (224), a fourth throttle member (225), and a fifth throttle member (226), wherein the first throttle member (207) is connected between a first port (201a) of the accumulator (201) and the second control valve (211), the second control valve (211) is arranged on a connecting pipe between the outdoor heat exchanger (105) and the first throttle member (207), and one end of the third control valve (210) is connected to the first port (201a) of the accumulator (201). The first throttling member (207) and the second control valve (211) are connected to the connecting pipeline. The other end of the third control valve (210) is connected to the connecting pipeline between the exhaust port of the compressor (101) and the outdoor heat exchanger (105). One end of the fifth control valve (203) is in communication with the indoor heat exchanger (301). The other end of the fifth control valve (203) is connected to the connecting pipeline between the second control valve (211) and the outdoor heat exchanger (105). The storage container (220) has a first interface (220a), a second interface (220b) and a third interface (220c). The seventh control valve (221) has a One end of the seventh control valve (221) is in communication with the first interface (220a) of the storage container (220), the other end of the seventh control valve (221) is connected to the connecting pipeline between the fifth control valve (203) and the outdoor heat exchanger (105), one end of the eighth control valve (222) is in communication with the second interface (220b) of the storage container (220), the other end of the eighth control valve (222) is connected to the connecting pipeline between the air inlet of the compressor (101) and the indoor heat exchanger (301), one end of the ninth control valve (223) is in communication with the third interface (220c) of the storage container (220), the other end of the ninth control valve (223) is connected to the connecting pipeline between the air inlet of the compressor (101) and the indoor heat exchanger (301), On the connecting pipeline between the air inlet of the compressor (101) and the indoor heat exchanger (301), one end of the tenth control valve (224) is in communication with the second interface (220b) of the storage container (220), the other end of the tenth control valve (224) is connected to the connecting pipeline between the third control valve (210) and the outdoor heat exchanger (105), the fourth throttling element (225) is connected between the ninth control valve (223) and the third interface (220c) of the storage container (220), and the fifth throttling element (226) is connected between the tenth control valve (224) and the second interface (220b) of the storage container (220); controlling the seventh control valve (221), the eighth control valve (222), the ninth control valve (223), and the tenth control valve (224) to close, so that the storage container (220) enters a closed state; Controlling the seventh control valve (221) and the tenth control valve (224) to open, and the eighth control valve (222) and the ninth control valve (223) to close, so that the storage container (220) enters a refrigerant storage state; or The eighth control valve (222) and the ninth control valve (223) are controlled to be open, and the seventh control valve (221) and the tenth control valve (224) are controlled to be closed, so that the storage container (220) enters a refrigerant release state.

20. The control method according to claim 18, characterized in that: Controlling the state of the storage container (220) to be a closed state, a refrigerant storage state, or a refrigerant release state according to the refrigerant demand of the refrigeration system includes: A valve assembly is provided, comprising a first throttle member (207), a second control valve (211), a fifth control valve (203), an eleventh control valve (227), a twelfth control valve (228), and a sixth throttle member (229), wherein the first throttle member (207) is connected between a first port (201a) of the accumulator (201) and the second control valve (211), the second control valve (211) is arranged on a connecting pipe between the outdoor heat exchanger (105) and the first throttle member (207), one end of the fifth control valve (203) is communicated with the indoor heat exchanger (301), and the other end of the fifth control valve (203) is connected between the second control valve (211) and the outdoor heat exchanger (1 05), the storage container (220) includes a fourth interface (220d) and a fifth interface (220e), one end of the eleventh control valve (227) is communicated with the fourth interface (220d) of the storage container (220), the other end of the eleventh control valve (227) is connected to the connecting pipeline between the fifth control valve (203) and the outdoor heat exchanger (105), the twelfth control valve (228) is connected between the fifth interface (220e) of the storage container (220) and the sixth throttling element (229), the other end of the sixth throttling element (229) is connected to the connecting pipeline between the air inlet of the compressor (101) and the indoor heat exchanger (301); controlling the eleventh control valve (227) and the twelfth control valve (228) to close, so that the storage container (220) enters a closed state; Controlling the eleventh control valve (227) and the twelfth control valve (228) to open, so that the storage container (220) enters a refrigerant storage state; or The eleventh control valve (227) is controlled to be closed, and the twelfth control valve (228) is controlled to be opened, so that the storage container (220) enters a refrigerant release state.

21. A control device for a refrigeration 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 8 to 20 based on instructions stored in the memory.

22. 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 8 to 20 is implemented.

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