Refrigeration system control method, device and refrigeration system

Abstract

The present application relates to a control method, device and refrigeration system of a refrigeration system, the method comprising: during the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after being shut down, determining whether the refrigeration circuit is conductive; when it is determined that the refrigeration circuit is not conductive, controlling the compressor to start, and controlling the pressure regulating device in the refrigeration system to work, so as to adjust the pressure difference between the suction port of the compressor and the exhaust port of the compressor; after the pressure difference between the suction port and the exhaust port is adjusted, controlling the pressure regulating device to stop working, and controlling the first pipeline switch, the second pipeline switch and the third pipeline switch to make the refrigeration circuit conductive. The present application increases the service life of the compressor and ensures the operating reliability of the compressor.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration systems, and in particular to a control method and device for a refrigeration system and a refrigeration system. Background Art

[0002] For the refrigeration system, when the refrigeration system does not meet the refrigeration demand, the compressor in the refrigeration system continues to work so that the refrigeration system meets the refrigeration demand. When the refrigeration system meets the refrigeration demand, the compressor in the refrigeration system stops working. During the period when the compressor stops working, the temperature will rise sharply. At this time, the compressor needs to be started again. If the compressor is started for refrigeration, since the evaporator in the refrigeration system is connected to the condenser through the compressor, the compressor will be started directly with pressure, which will cause an impact on the compressor and affect the service life and operational reliability of the compressor. Summary of the invention

[0003] The present application provides a control method and device for a refrigeration system and a refrigeration system to solve the technical problem in the prior art that the compressor in the refrigeration system is restarted after being shut down, which affects the service life and operation reliability of the compressor.

[0004] In a first aspect, the present application provides a control method for a refrigeration system, the refrigeration system comprising: a refrigeration circuit, the refrigeration circuit comprising a first pipeline switch, an evaporator, a second pipeline switch, a compressor, a third pipeline switch, and a condenser connected in series in sequence, a pressure regulating device being provided between an air intake port of the compressor and an air discharge port of the compressor;

[0005] The method comprises:

[0006] During the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after being stopped, determining whether the refrigeration circuit is connected;

[0007] When it is determined that the refrigeration circuit is not conducting, the compressor is controlled to start, and the pressure regulating device is controlled to operate so as to adjust the pressure difference between the air intake port and the air discharge port;

[0008] After the pressure difference adjustment between the air intake port and the air exhaust port is completed, the pressure regulating device is controlled to stop working, and the first pipeline switch, the second pipeline switch and the third pipeline switch are controlled to make the refrigeration circuit conductive.

[0009] In an optional embodiment, the pressure regulating device includes a pressure balancing pipeline, a throttling pipeline and a pipeline switching component, the pressure balancing pipeline and the throttling pipeline are connected to the suction port of the compressor, the pipeline switching component is arranged at the connection between the pressure balancing pipeline and the exhaust port of the compressor, and the throttling pipeline is also connected to the pipeline switching component;

[0010] The controlling the compressor to start and the controlling the pressure regulating device to operate so as to adjust the pressure difference between the air intake port and the air discharge port comprises:

[0011] Controlling the pipeline switching element so that the air intake port and the air exhaust port are connected through the pressure balance pipeline to adjust the pressure balance between the air intake port and the air exhaust port;

[0012] After the pressure balance adjustment between the intake port and the exhaust port is completed, the compressor is controlled to start, and the pipeline switching component is controlled so that the intake port and the exhaust port are connected through the throttling pipeline to adjust the pressure difference between the intake port and the exhaust port.

[0013] In an optional embodiment, the pressure balance adjustment between the air intake port and the air exhaust port is determined by:

[0014] After the air intake port and the air exhaust port are connected through the pressure balance pipeline, determining the duration of the connection between the air intake port and the air exhaust port;

[0015] When the duration is greater than or equal to a preset duration threshold, it is determined that the pressure balance adjustment between the intake port and the exhaust port is completed, and the preset duration threshold is used to characterize the lower limit value of the duration corresponding to the completion of the pressure balance adjustment between the intake port and the exhaust port.

[0016] In an optional embodiment, a first pressure detection member is provided between the pressure regulating device and the evaporator, and a second pressure detection member is provided between the pressure regulating device and the air intake port;

[0017] The pressure difference adjustment between the air intake port and the air exhaust port is completed by:

[0018] After adjusting the pressure difference between the air intake port and the air exhaust port, obtaining a first pressure value corresponding to the evaporator detected by the first pressure detection component and a second pressure value corresponding to the air intake port detected by the second pressure detection component;

[0019] determining an absolute value of a difference between the first pressure value and the second pressure value;

[0020] When the absolute value of the difference is less than a preset difference threshold, it is determined that the pressure difference adjustment between the intake port and the exhaust port is completed. The preset difference threshold is used to characterize the upper limit value of the absolute value of the difference corresponding to the completion of the pressure difference adjustment between the intake port and the exhaust port.

[0021] In an optional embodiment, before executing the step of determining whether the refrigeration circuit is connected if it is determined that the compressor needs to be started after being stopped, the method further includes:

[0022] If it is determined that the compressor needs to be shut down, the compressor is controlled to be shut down, and the first pipeline on-off component, the second pipeline on-off component and the third pipeline on-off component are controlled to make the refrigeration circuit not conductive.

[0023] In an optional embodiment, during the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after being stopped, before the step of determining whether the refrigeration circuit is turned on, the method further includes:

[0024] When the refrigeration system is started, obtaining a target start and stop number of times corresponding to the compressor and a target working time corresponding to the compressor;

[0025] Determining a target remaining service life corresponding to the pipeline switching component according to the target number of starts and stops and the target working time;

[0026] When the target remaining service life is greater than a preset service life threshold, the step of determining whether the refrigeration circuit is turned on is performed during the refrigeration process of the refrigeration system if it is determined that the compressor needs to be started after being shut down. The preset service life threshold is used to represent the minimum remaining service life that allows the pipeline switching component to work.

[0027] In an optional implementation, determining the target remaining service life corresponding to the pipeline switching component according to the target number of starts and stops and the target working time includes:

[0028] Determine a first remaining service life corresponding to the target start and stop times based on a first association relationship, wherein the first association relationship stores a plurality of corresponding relationships between the start and stop times corresponding to the compressor and the remaining service life corresponding to the pipeline switching component;

[0029] Based on a second association relationship, determining a second remaining service life corresponding to the target working time, wherein the second association relationship stores a plurality of corresponding relationships between the working time corresponding to the compressor and the remaining service life corresponding to the pipeline switching component;

[0030] An average value between the first remaining useful life and the second remaining useful life is determined to obtain a target remaining useful life corresponding to the pipeline switching component.

[0031] In an optional implementation, determining the target remaining service life corresponding to the pipeline switching component according to the target number of starts and stops and the target working time includes:

[0032] Acquire a training sample set, wherein the training sample set includes a plurality of sets of correspondences between the historical start and stop times and the historical working hours corresponding to the compressor and the historical remaining service life corresponding to the pipeline switching component;

[0033] Using the training sample set to train a preset machine learning model to obtain a life prediction model, wherein the life prediction model is used to predict the remaining service life corresponding to the pipeline switching component;

[0034] The target number of starts and stops and the target working time are input into the life prediction model, so that the life prediction model outputs the target remaining service life corresponding to the pipeline switching component.

[0035] In a second aspect, the present application provides a control device for a refrigeration system, the refrigeration system comprising: a refrigeration circuit, the refrigeration circuit comprising a first pipeline switch, an evaporator, a second pipeline switch, a compressor, a third pipeline switch and a condenser connected in series in sequence, and a pressure regulating device is provided between an air intake port of the compressor and an air discharge port of the compressor;

[0036] The device comprises:

[0037] A determination module, used to determine whether the refrigeration circuit is connected if it is determined that the compressor needs to be started after being stopped during the refrigeration process of the refrigeration system;

[0038] A regulating module, for controlling the compressor to start and the compressor regulating device to operate to adjust the pressure difference between the air intake port and the air discharge port when determining that the refrigeration circuit is not conducting;

[0039] The control module is also used to control the pressure regulating device to stop working after the pressure difference adjustment between the suction port and the exhaust port is completed, and to control the first pipeline on-off device, the second pipeline on-off device and the third pipeline on-off device to make the refrigeration circuit conductive.

[0040] In a third aspect, the present application provides a refrigeration system, comprising: a refrigeration circuit, a processor and a memory, the refrigeration circuit comprising a first pipeline switch, an evaporator, a second pipeline switch, a compressor, a third pipeline switch and a condenser connected in series in sequence, a pressure regulating device is provided between an air intake port of the compressor and an air discharge port of the compressor, the processor is connected to the first pipeline switch, the second pipeline switch, the third pipeline switch, the compressor, the pressure regulating device and the memory;

[0041] The processor is used to execute the control program of the refrigeration system stored in the memory to implement the control method of the refrigeration system as described above.

[0042] In an optional embodiment, the pressure regulating device includes a pressure balancing pipeline, a throttling pipeline and a pipeline switching component, the pressure balancing pipeline and the throttling pipeline are connected to the suction port of the compressor, the pipeline switching component is arranged at the connection between the pressure balancing pipeline and the exhaust port of the compressor, and the throttling pipeline is also connected to the pipeline switching component.

[0043] The above-mentioned technical scheme provided by the embodiment of the present application has the following advantages compared with the prior art. The control method of the refrigeration system provided by the embodiment of the present application is applied to a refrigeration system, which includes a refrigeration circuit, and the refrigeration circuit includes a first pipeline switch, an evaporator, a second pipeline switch, a compressor, a third pipeline switch and a condenser connected in series in sequence, and a pressure regulating device is arranged between the suction port of the compressor and the exhaust port of the compressor; the method includes: during the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after shutdown, determining whether the refrigeration circuit is conductive; when it is determined that the refrigeration circuit is not conductive, controlling the compressor to start, and controlling the pressure regulating device to work, so as to adjust the pressure difference between the suction port and the exhaust port; after the pressure difference adjustment between the suction port and the exhaust port is completed, controlling the pressure regulating device to stop working, and controlling the first pipeline switch, the second pipeline switch and the third pipeline switch to make the refrigeration circuit conductive. Through the above method, the present application sets a first pipeline switch between the evaporator and the condenser, a second pipeline switch between the evaporator and the compressor, a third pipeline switch between the compressor and the condenser, and a pressure regulating device between the suction port and the exhaust port of the compressor, so that when the compressor needs to be shut down, the refrigeration circuit is controlled to be non-conductive, thereby completely separating the evaporator and the condenser. When the compressor is restarted, since the evaporator and the condenser are completely separated, the compressor start and the pressure regulating device can be controlled to work, so that a pressure difference is established between the suction port of the compressor and the exhaust port of the compressor. After the pressure difference is established, the first pipeline switch, the second pipeline switch and the third pipeline switch can be controlled to make the refrigeration circuit conductive. In this way, the impact on the compressor caused by the pressure difference between the evaporator and the condenser when the compressor is started can be avoided, thereby improving the service life of the compressor and ensuring the operating reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0046] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0047] Figure 1 A schematic diagram of the structure of a refrigeration system provided in an embodiment of the present application;

[0048] Figure 2 A schematic flow chart of a control method for a refrigeration system provided in an embodiment of the present application;

[0049] Figure 3 A schematic flow chart of another refrigeration system control method provided in an embodiment of the present application;

[0050] Figure 4 A schematic flow chart of another refrigeration system control method provided in an embodiment of the present application;

[0051] Figure 5 A schematic flow chart of another refrigeration system control method provided in an embodiment of the present application;

[0052] Figure 6 A schematic diagram of the structure of a control device for a refrigeration system provided in an embodiment of the present application;

[0053] Figure 7 A schematic diagram of the structure of another refrigeration system provided in an embodiment of the present application;

[0054] In the above attached figure:

[0055] 10. First pipeline switch; 20. Evaporator; 30. Second pipeline switch; 40. Compressor; 41. Air intake of compressor; 42. Exhaust of compressor; 50. Third pipeline switch; 60. Condenser; 70. Dryer; 80. Capillary tube; 90. Pressure regulating device; 91. Pressure balance pipeline; 92. Throttle pipeline; 93. Pipeline switching element; 100. First pressure detection element; 101. Second pressure detection element;

[0056] 601, determination module; 602, adjustment module; 603: control module;

[0057] 700, refrigeration system; 701, processor; 702, memory; 7021, operating system; 7022, application; 703, user interface; 704, network interface; 705, bus system. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0059] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0060] refer to Figure 1 , Figure 1 A schematic diagram of the structure of a refrigeration system provided in an embodiment of the present application. A refrigeration system provided in this embodiment includes: a refrigeration circuit, the refrigeration circuit includes a first pipeline switch 10, an evaporator 20, a second pipeline switch 30, a compressor 40, a third pipeline switch 50 and a condenser 60 connected in series in sequence, and a pressure regulating device 90 is provided between the air intake port 41 of the compressor and the air outlet 42 of the compressor, and the pressure regulating device 90 is used to adjust the pressure difference between the air intake port 41 of the compressor and the air outlet 42 of the compressor. The refrigeration system also includes a dryer 70 and a capillary tube 80, the dryer 70 is arranged between the condenser 60 and the first pipeline switch 10, and the capillary tube 80 is arranged between the dryer 70 and the first pipeline switch 10.

[0061] The second pipeline switch 30 is arranged between the evaporator 20 and the air inlet 41 of the compressor, and the third pipeline switch 50 is arranged between the air outlet 42 of the compressor and the condenser 60. The first pipeline switch 10, the second pipeline switch 30 and the third pipeline switch 50 are actually a solenoid valve. When the first pipeline switching device 10 is energized, the pipeline between the evaporator 20 and the condenser 60 is not conductive, and when the first pipeline switching device 10 is de-energized, the pipeline between the evaporator 20 and the condenser 60 is conductive; when the second pipeline switching device 30 is energized, the pipeline between the evaporator 20 and the air intake port 41 of the compressor is not conductive, and when the second pipeline switching device 30 is de-energized, the pipeline between the evaporator 20 and the air intake port 41 of the compressor is conductive; when the third pipeline switching device 50 is energized, the pipeline between the exhaust port 42 of the compressor and the condenser 60 is not conductive, and when the third pipeline switching device 50 is de-energized, the pipeline between the exhaust port 42 of the compressor and the condenser 60 is conductive. When the first pipeline switch 10, the second pipeline switch 30 and the third pipeline switch 50 are powered on, the refrigeration circuit is not conductive. When the first pipeline switch 10, the second pipeline switch 30 and the third pipeline switch 50 are powered off, the refrigeration circuit is conductive.

[0062] Specifically, the pressure regulating device 90 includes a pressure balancing pipeline 91, a throttling pipeline 92 and a pipeline switching member 93. The pressure balancing pipeline 91 and the throttling pipeline 92 are connected to the air intake port 41 of the compressor. The pipeline switching member 93 is arranged at the connection between the pressure balancing pipeline 91 and the air outlet port 42 of the compressor. The throttling pipeline 92 is also connected to the pipeline switching member 93. The pressure balancing pipeline 91 is used to adjust the pressure balance between the air intake port 41 of the compressor and the air outlet port 42 of the compressor, and the throttling pipeline 92 is used to adjust the pressure difference between the air intake port 41 of the compressor and the air outlet port 42 of the compressor. The throttling pipeline 92 is actually a capillary tube. The pipeline switching component 93 is actually a two-position three-way valve. When the pipeline switching component 93 is at a low potential, the suction port 41 of the compressor is connected to the exhaust port 42 of the compressor through the pressure balance pipeline 91. When the pipeline switching component 93 is at a high potential, the suction port 41 of the compressor is connected to the exhaust port 42 of the compressor through the throttling pipeline 92.

[0063] More specifically, the refrigeration system further includes a first pressure detection member 100 and a second pressure detection member 101. The first pressure detection member 100 is disposed on the pipeline between the pressure regulating device 90 and the evaporator 20, and the second pressure detection member 101 is disposed on the pipeline between the pressure regulating device 90 and the air intake port 41 of the compressor. The first pressure detection member 100 is used to detect the pressure value of the low-pressure zone of the evaporator 20, and the second pressure detection member 101 is used to detect the pressure value at the air intake port 41 of the compressor. The first pressure detection member 100 and the second pressure detection member 101 are both pressure sensors. The pressure value of the low-pressure zone of the evaporator 20 detected by the first pressure detection member 100 and the pressure value at the air intake port 41 of the compressor detected by the second pressure detection member 101 are used to adjust the pressure difference between the air intake port 41 of the compressor and the air exhaust port 42 of the compressor by using the throttling line 92.

[0064] refer to Figure 2 , Figure 2 A flow chart of a control method for a refrigeration system provided in an embodiment of the present application. A control method for a refrigeration system provided in this embodiment comprises the following steps:

[0065] S201: During the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after being stopped, determine whether the refrigeration circuit is connected.

[0066] In this embodiment, the control method in this embodiment is applied to the above-mentioned refrigeration system. During the refrigeration process of the refrigeration system, the current refrigeration temperature can be obtained in real time. If the current refrigeration temperature reaches the preset refrigeration temperature, it is determined that the compressor needs to be shut down. When it is determined that the compressor needs to be shut down, the compressor is controlled to be shut down, and the refrigeration circuit is controlled to be non-conductive, thereby separating the condensation high-pressure area and the evaporation low-pressure area. During the shutdown of the compressor, due to the rise in the evaporator temperature and the decrease in the condenser temperature, the pressure in the evaporator will increase slightly, and the pressure in the condenser table will decrease slightly.

[0067] Before executing the step of determining whether the refrigeration circuit is connected if it is determined that the compressor needs to be started after being stopped in step S201, a control method for a refrigeration system provided in this embodiment further includes the following steps:

[0068] If it is determined that the compressor needs to be shut down, the compressor is controlled to shut down, and the first pipeline on-off component, the second pipeline on-off component and the third pipeline on-off component are controlled to make the refrigeration circuit non-conductive.

[0069] Specifically, when the refrigeration system is started, if the current refrigeration temperature is higher than the preset refrigeration temperature, it indicates that there is a refrigeration demand. At this time, the compressor is controlled to start, and the first pipeline on-off component, the second pipeline on-off component and the third pipeline on-off component are controlled to be powered off, so that the entire refrigeration circuit is turned on. And the pressure regulating device is controlled not to work, so that the air intake of the compressor is not connected to the exhaust port of the compressor through the pressure regulating device. The pipeline switching component in the pressure regulating device is controlled to be powered off, so that the pressure balance pipeline and the throttling pipeline in the pressure regulating device are not connected to the air intake of the compressor and the exhaust port of the compressor, and only the refrigeration circuit is turned on. When the refrigeration circuit is turned on, the refrigerant flows through the refrigerant device, the dryer, the capillary tube and the evaporator in sequence through the exhaust port of the compressor, and then flows back to the air intake of the compressor, forming a high temperature and high pressure area in the condenser, and forming a low temperature and low pressure gas in the evaporator. Since the evaporator continuously provides cold capacity, the current refrigeration temperature continues to decrease until it reaches the preset refrigeration temperature, so as to control the compressor to stop.

[0070] More specifically, if it is determined that the compressor needs to be shut down, the compressor is controlled to shut down, and the first pipeline switch, the second pipeline switch, and the third pipeline switch are controlled to be energized so that the entire refrigeration circuit is not conductive. After the compressor is shut down, this embodiment controls the first pipeline switch, the second pipeline switch, and the third switch to isolate the evaporator from the condenser to prevent the compressor from being impacted when it is restarted.

[0071] It should be noted that determining whether the refrigeration circuit is connected can be understood as determining whether the first pipeline switching device, the second pipeline switching device and the third pipeline switching device are energized. When the first pipeline switching device, the second pipeline switching device and the third pipeline switching device are energized, it is determined that the refrigeration circuit is not connected; when the first pipeline switching device, the second pipeline switching device and the third pipeline switching device are de-energized, it is determined that the refrigeration circuit is connected.

[0072] S202: When it is determined that the refrigeration circuit is not conducting, the compressor is controlled to start, and the pressure regulating device is controlled to operate to adjust the pressure difference between the suction port and the exhaust port.

[0073] In this embodiment, after the compressor stops, in order to prevent the compressor from being impacted due to the large pressure difference between the suction port of the compressor and the exhaust port of the compressor when the compressor is restarted, when it is determined that the compressor needs to be restarted, the compressor is controlled to start and the compressor regulating device is controlled to operate, so that under the action of the pressure regulating device, the pressure difference between the suction port of the compressor and the exhaust port of the compressor is adjusted, so that when the refrigeration circuit is turned on, the pressure difference between the suction port of the compressor and the exhaust port of the compressor is reduced, thereby avoiding impact on the compressor, increasing the service life of the compressor, and ensuring the reliable operation of the compressor.

[0074] Among them, after the compressor is stopped, the current refrigeration temperature is obtained in real time. If the current refrigeration temperature exceeds the preset refrigeration temperature, it is determined that the compressor needs to be started.

[0075] S203: After the pressure difference between the air intake port and the air exhaust port is adjusted, the pressure regulating device is controlled to stop working, and the first pipeline switch, the second pipeline switch and the third pipeline switch are controlled to make the refrigeration circuit conductive.

[0076] In this embodiment, after the pressure regulating device is controlled to work, in order to ensure that the current refrigeration temperature quickly reaches the preset refrigeration temperature to improve the user experience, it is necessary to determine in real time whether the pressure difference adjustment between the suction port of the compressor and the exhaust port of the compressor has been completed. After determining that the pressure difference adjustment between the suction port of the compressor and the exhaust port of the compressor has been completed, it indicates that there will be no impact on the compressor after the current refrigeration circuit is turned on. At this time, the pressure regulating device is controlled to stop working, and the first pipeline on-off device, the second pipeline on-off device and the third pipeline on-off device are controlled to be powered off, so that the refrigeration circuit is turned on.

[0077] The present embodiment provides a control method for a refrigeration system, wherein a first pipeline switch piece is arranged between the evaporator and the condenser, a second pipeline switch piece is arranged between the evaporator and the compressor, a third pipeline switch piece is arranged between the compressor and the condenser, and a pressure regulating device is arranged between the air intake port and the air exhaust port of the compressor, so that when the compressor needs to be shut down, the refrigeration circuit is controlled to be non-conductive, thereby completely separating the evaporator and the condenser. When the compressor is restarted, since the evaporator and the condenser are completely separated, the compressor can be controlled to start and the pressure regulating device can be controlled to work, so that a pressure difference is established between the air intake port of the compressor and the air exhaust port of the compressor. After the pressure difference is established, the first pipeline switch piece, the second pipeline switch piece and the third pipeline switch piece can be controlled to make the refrigeration circuit conductive. In this way, the impact on the compressor caused by the pressure difference between the evaporator and the condenser when the compressor is started can be avoided, thereby improving the service life of the compressor and ensuring the operating reliability of the compressor.

[0078] refer to Figure 3 , Figure 3 A flow chart of another control method for a refrigeration system provided in an embodiment of the present application. A control method for a refrigeration system provided in this embodiment includes the following steps:

[0079] S301: During the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after being stopped, determine whether the refrigeration circuit is connected.

[0080] In this embodiment, step S301 is consistent with the above-mentioned step S201. For details, please refer to the above-mentioned step S201, which will not be described in detail in this embodiment.

[0081] S302: When it is determined that the refrigeration circuit is not connected, the pipeline switching component is controlled so that the air intake port and the air exhaust port are connected through the pressure balance pipeline to adjust the pressure balance between the air intake port and the air exhaust port.

[0082] S303: After the pressure balance adjustment between the air intake port and the air exhaust port is completed, the compressor is controlled to start, and the pipeline switching component is controlled so that the air intake port and the air exhaust port are connected through the throttling pipeline to adjust the pressure difference between the air intake port and the air exhaust port.

[0083] With respect to the above-mentioned steps S302 and S303, when it is determined that the refrigeration circuit is not conducting, the upper potential of the pipeline switching component is controlled to be low, so that the air intake port of the compressor and the exhaust port of the compressor are conducting through the pressure balancing pipeline. Since the pressure balancing pipeline is short and has low resistance, the pressures of the air intake port of the compressor and the exhaust port of the compressor are instantly balanced. After the pressures between the air intake port of the compressor and the exhaust port of the compressor are balanced, it is easier to subsequently adjust the pressure difference between the air intake port of the compressor and the exhaust port of the compressor. After it is determined that the pressure balance adjustment between the air intake port of the compressor and the exhaust port of the compressor is completed, the pressure difference between the air intake port of the compressor and the exhaust port of the compressor can be adjusted by continuing to control the pipeline switching component. The pressure regulating device in this embodiment is configured with a pressure balancing pipeline, a throttling pipeline and a pipeline switching component for switching the pressure balancing pipeline and the throttling pipeline, so that the pressure between the suction port of the compressor and the exhaust port of the compressor is balanced by switching the pressure balancing pipeline through the pipeline switching component. After the pressure is balanced, the throttling pipeline is switched through the pipeline switching component to facilitate the adjustment of the pressure difference between the suction port of the compressor and the exhaust port of the compressor.

[0084] The pressure balance adjustment between the air intake port and the air exhaust port can be determined by:

[0085] After the air intake port and the air exhaust port are connected through the pressure balance pipeline, determine the duration of the connection between the air intake port and the air exhaust port;

[0086] When the duration is greater than or equal to a preset duration threshold, it is determined that the pressure balance adjustment between the intake port and the exhaust port is completed. The preset duration threshold is used to characterize the lower limit value of the duration corresponding to the completion of the pressure balance adjustment between the intake port and the exhaust port.

[0087] Specifically, in order to ensure the reliable starting of the subsequent compressor and facilitate the subsequent adjustment of the pressure difference between the suction port of the compressor and the exhaust port of the compressor, after the suction port of the compressor and the exhaust port of the compressor are connected through the pressure balance pipeline, the timer in the refrigeration system is used to time the duration of the connection between the suction port of the compressor and the exhaust port of the compressor. When the duration is less than the preset duration threshold, the pipeline switching element continues to be controlled to a low potential. When the duration is greater than or equal to the preset duration threshold, it is determined that the pressure balance adjustment between the suction port and the exhaust port is completed, and the compressor is controlled to start and the pipeline switching element is controlled to a high potential, so that the suction port of the compressor and the exhaust port of the compressor are connected through the throttling pipeline.

[0088] More specifically, the preset duration threshold can be set according to actual needs, and the specific value of the preset duration threshold is not specifically limited in this embodiment. For example, the preset duration threshold can be 10s.

[0089] In this embodiment, after the pressure balance adjustment between the suction port of the compressor and the exhaust port of the compressor is completed, the compressor can be controlled to start, and the upper potential of the pipeline switching component can be controlled to be high, so that the suction port of the compressor and the exhaust port of the compressor are connected through the throttling pipeline. At this time, a pressure difference can be established between the suction port of the compressor and the exhaust port of the compressor in a short time through throttling of the throttling pipeline. After the pressure difference is established between the suction port of the compressor and the exhaust port of the compressor, the pipeline switching component can be controlled to cut off the power, so that the suction port of the compressor and the exhaust port of the compressor are not connected through the pressure balance pipeline and the throttling pipeline, and the first pipeline power-on component, the second pipeline on-off component and the third pipeline on-off component are controlled to cut off the power, so that the refrigeration circuit works to realize the refrigeration of the refrigeration system. At this time, the refrigeration circuit will not have a large impact on the compressor after it is connected, thereby improving the service life of the compressor and ensuring the reliable use of the compressor.

[0090] The pressure difference between the air inlet and the air outlet can be adjusted as follows:

[0091] After adjusting the pressure difference between the air intake port and the air exhaust port, obtaining a first pressure value corresponding to the evaporator detected by the first pressure detection component and a second pressure value corresponding to the air intake port detected by the second pressure detection component;

[0092] determining an absolute value of a difference between a first pressure value and a second pressure value;

[0093] When the absolute value of the difference is less than a preset difference threshold, it is determined that the pressure difference adjustment between the intake port and the exhaust port is completed. The preset difference threshold is used to represent the upper limit value of the absolute value of the difference corresponding to the completion of the pressure difference adjustment between the intake port and the exhaust port.

[0094] Specifically, the preset difference threshold can be set according to actual needs, and the specific value of the preset difference threshold is not limited in this embodiment. In this embodiment, the first pressure value corresponding to the evaporator and the second pressure value corresponding to the air intake port of the compressor are obtained so that the first pressure value is close to the second pressure value, thereby establishing a pressure difference between the air intake port of the compressor and the exhaust port of the press. In this way, after the refrigeration circuit is turned on, the impact of the pressure difference on the compressor is reduced, the service life of the compressor is increased, and the reliable use of the compressor is guaranteed.

[0095] S304: After the pressure difference between the air intake port and the air exhaust port is regulated, the pressure regulating device is controlled to stop working, and the first pipeline switch, the second pipeline switch and the third pipeline switch are controlled to make the refrigeration circuit conductive.

[0096] In this embodiment, step S304 is consistent with the above-mentioned step S203. For details, please refer to the above-mentioned step S203, which will not be described in detail in this embodiment.

[0097] The present embodiment provides a control method for a refrigeration system, wherein a first pipeline switch piece is arranged between the evaporator and the condenser, a second pipeline switch piece is arranged between the evaporator and the compressor, a third pipeline switch piece is arranged between the compressor and the condenser, and a pressure regulating device is arranged between the air intake port and the air exhaust port of the compressor, so that when the compressor needs to be shut down, the refrigeration circuit is controlled to be non-conductive, thereby completely separating the evaporator and the condenser. When the compressor is restarted, since the evaporator and the condenser are completely separated, the compressor can be controlled to start and the pressure regulating device can be controlled to work, so that a pressure difference is established between the air intake port of the compressor and the air exhaust port of the compressor. After the pressure difference is established, the first pipeline switch piece, the second pipeline switch piece and the third pipeline switch piece can be controlled to make the refrigeration circuit conductive. In this way, the impact on the compressor caused by the pressure difference between the evaporator and the condenser when the compressor is started can be avoided, thereby improving the service life of the compressor and ensuring the operating reliability of the compressor.

[0098] refer to Figure 4 , Figure 4 A flow chart of another control method of a refrigeration system provided in an embodiment of the present application. A control method of a refrigeration system provided in this embodiment includes the following steps:

[0099] S401: When the refrigeration system is started, a target start and stop number of times corresponding to the compressor and a target working time corresponding to the compressor are obtained.

[0100] S402: Determine the target remaining service life corresponding to the pipeline switching component according to the target number of startups and the target working time.

[0101] S403: When the target remaining service life is greater than a preset service life threshold, during the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after being stopped, determine whether the refrigeration circuit is connected.

[0102] For the above-mentioned steps S401 to S403, the preset service life threshold is used to characterize the minimum remaining service life of the pipeline switching component allowed to work. In order to prevent the aging of the pipeline switching component in the pressure regulating device from affecting the pressure-maintaining start of the compressor, when the refrigeration system is started, the target start-stop times and the target working time corresponding to the compressor are obtained, so as to use the target start-stop times and the target working time to determine the target remaining service life corresponding to the pipeline switching component, so as to determine whether the pipeline switching component is allowed to continue to work according to the target remaining service life. In the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after shutdown, it is determined whether the refrigeration circuit is turned on; and when it is determined that the pipeline switching component is not allowed to continue to work according to the target remaining service life, an alarm prompt is issued.

[0103] Specifically, the specific value of the preset service life threshold can be set according to actual needs, and the specific value of the preset service life threshold is not limited in this embodiment. When the target remaining service life is greater than the preset service life threshold, it indicates that the pipeline switching component is allowed to continue to work, so the pipeline switching component can continue to be controlled to maintain the pressure of the compressor; when the target remaining service life is less than or equal to the preset service life threshold, it indicates that the pipeline switching component is not allowed to continue to work, and an alarm prompt is issued.

[0104] It should be noted that in step S403, if it is determined that the compressor needs to be started after being shut down, the step of determining whether the refrigeration circuit is turned on is consistent with the above-mentioned step S201. For details, please refer to the above-mentioned step S201, which will not be repeated in this embodiment. The above-mentioned target start-stop times and target working time can be counted after the refrigeration system leaves the factory, and the counted target start-stop times and target working time are stored. When determining whether to allow the pipeline switching component to work, it can be obtained from the location where the start-stop times and target working time are stored. Among them, the start-stop times of the compressor to the shutdown can be counted as the number of starts and stops in sequence, and the target working time corresponding to the compressor is actually the length of time the refrigeration system has been working since leaving the factory.

[0105] In the above step S402, the target remaining service life corresponding to the pipeline switching component is determined according to the target number of startups and the target working time, including:

[0106] Based on the first association relationship, a first remaining service life corresponding to the target start and stop times is determined, wherein the first association relationship stores a correspondence between a plurality of groups of compressors and the corresponding start and stop times and the remaining service life corresponding to the pipeline switching components;

[0107] Based on the second association relationship, a second remaining service life corresponding to the target working time is determined, wherein the second association relationship stores a correspondence between the working time corresponding to a plurality of groups of compressors and the remaining service life corresponding to the pipeline switching components;

[0108] The average value between the first remaining service life and the second remaining service life is determined to obtain a target remaining service life corresponding to the pipeline switching component.

[0109] In this embodiment, the first association relationship and the second association relationship can be preset. After obtaining the target start-stop number and the target working time, the first association relationship can be queried using the target start-stop number to obtain the first remaining service life corresponding to the target start-stop number. The second association relationship can be queried using the target working time to obtain the second remaining service life corresponding to the target working time, thereby averaging the first remaining service life and the second remaining service life to obtain the target remaining service life corresponding to the pipeline switching component. This embodiment provides a method for determining the target remaining service life, so as to determine whether the pipeline switching component is allowed to work according to the determined target remaining service life, thereby ensuring that the compressor can maintain pressure, and further ensuring the operational reliability of the entire refrigeration system.

[0110] In the above step S402, the target remaining service life corresponding to the pipeline switching component is determined according to the target number of startups and the target working time, and further includes:

[0111] Obtaining a training sample set, the training sample set including a correspondence between historical start and stop times and historical working hours corresponding to multiple groups of compressors and historical remaining service life corresponding to pipeline switching components;

[0112] The preset machine learning model is trained using the training sample set to obtain a life prediction model, and the life prediction model is used to predict the remaining service life corresponding to the pipeline switching component;

[0113] The target number of starts and stops and the target working time are input into the life prediction model, so that the life prediction model outputs the target remaining service life corresponding to the pipeline switching component.

[0114] In this embodiment, the preset machine learning model can be selected according to actual needs, and the specific form of the preset machine learning model is not limited in this embodiment. In order to accurately determine the target remaining service life corresponding to the pipeline switching component, this embodiment trains the preset machine learning model through the acquired training sample set, so as to obtain a life prediction model for predicting the remaining service life corresponding to the pipeline switching component. After obtaining the target start and stop times and target working time corresponding to the compressor, since the input of the life prediction model is the start and stop times and the working time, the output of the life prediction model is the remaining service life, so the target start and stop times and the target working time are input into the life prediction model, so that the life prediction model outputs the target remaining service life corresponding to the pipeline switching component. This embodiment provides a method for determining the target remaining service life, so as to determine whether the pipeline switching component is allowed to work through the determined target remaining service life, so as to ensure that the compressor can achieve pressure maintenance, and then ensure the operational reliability of the entire refrigeration system.

[0115] S404: When it is determined that the refrigeration circuit is not conducting, the compressor is controlled to start, and the pressure regulating device is controlled to operate to adjust the pressure difference between the suction port and the exhaust port.

[0116] S405: After the pressure difference between the air intake port and the air exhaust port is adjusted, the pressure regulating device is controlled to stop working, and the first pipeline switch, the second pipeline switch and the third pipeline switch are controlled to make the refrigeration circuit conductive.

[0117] Regarding the above-mentioned step S404 and step S405, step S404 is consistent with the above-mentioned step S202, and step S405 is consistent with the above-mentioned step S203. For details, please refer to the above-mentioned step S202 and step S203, which will not be described in detail in this embodiment.

[0118] The present embodiment provides a control method for a refrigeration system, wherein a first pipeline switch piece is arranged between the evaporator and the condenser, a second pipeline switch piece is arranged between the evaporator and the compressor, a third pipeline switch piece is arranged between the compressor and the condenser, and a pressure regulating device is arranged between the air intake port and the air exhaust port of the compressor, so that when the compressor needs to be shut down, the refrigeration circuit is controlled to be non-conductive, thereby completely separating the evaporator and the condenser. When the compressor is restarted, since the evaporator and the condenser are completely separated, the compressor can be controlled to start and the pressure regulating device can be controlled to work, so that a pressure difference is established between the air intake port of the compressor and the air exhaust port of the compressor. After the pressure difference is established, the first pipeline switch piece, the second pipeline switch piece and the third pipeline switch piece can be controlled to make the refrigeration circuit conductive. In this way, the impact on the compressor caused by the pressure difference between the evaporator and the condenser when the compressor is started can be avoided, thereby improving the service life of the compressor and ensuring the operating reliability of the compressor.

[0119] As an example, refer to Figure 5 , let's introduce the control process of the entire refrigeration system in detail, as follows:

[0120] The refrigeration system is powered on, the current refrigeration temperature is higher than the set temperature, and there is a refrigeration demand. The first pipeline on-off fitting, the second pipeline on-off fitting, and the third pipeline on-off fitting are powered off, and the pipelines where they are located are connected, while the pipeline switching fitting is powered off, and the pipelines where they are located are disconnected from the pressure balance pipeline and the throttling pipeline. At this time, the compressor starts, and the refrigerant is discharged from the exhaust port of the compressor and flows through the condenser, dryer, capillary tube and evaporator in turn, and then flows back to the suction port of the compressor, forming a high temperature and high pressure area in the condenser, and a low temperature and low pressure area in the evaporator area. As the evaporator continuously provides cooling capacity, the current refrigeration temperature gradually decreases until the shutdown requirements are met.

[0121] When the refrigeration system meets the shutdown condition, the compressor shuts down, and the first pipeline on-off component, the second pipeline on-off component, and the third pipeline on-off component are powered on, and the pipelines where they are located are disconnected, separating the condensation high-pressure area and the evaporation low-pressure area. During the shutdown of the compressor, due to the temperature rise of the evaporator and the temperature drop of the condenser, the pressure in the evaporator will increase slightly, and the pressure in the condenser will decrease slightly.

[0122] Due to the shutdown of the compressor, the refrigeration system stops operating, and the current refrigeration temperature gradually rises. When the current refrigeration temperature rises to the startup condition, the pipeline switching component is at a low potential and remains so. The pressure balance pipeline is connected to the compressor. Since the pressure balance pipeline is short and has low resistance, the pressures at both ends of the compressor's suction and exhaust are instantaneously balanced. Preferably, it is maintained for 10 s to establish pressure balance for the startup of the compressor and ensure reliable startup. Then the pipeline switching component is at a high potential, and the pressure balance pipeline is disconnected, and the throttling pipeline is connected. At this time, the compressor starts, and a pressure difference can be established at the suction and exhaust ports within a short time through throttling by the throttling pipeline. When the pressure PL1 in the evaporation low-pressure area is close to the low pressure PL2 at the suction port of the compressor, and the impact on the compressor suction is weak, that is, |PL1 - PL2| < p (preset difference threshold), preferably, p = 100 pa, the first pipeline on-off component, the second pipeline on-off component, and the third pipeline on-off component are powered off, and the pipelines where they are located are connected, the condensation high-pressure area and the evaporation low-pressure area are connected and导通, and at the same time the pipeline switching component is powered off, and the pressure balance pipeline and the throttling pipeline where it is located remain disconnected, and the compressor continues to operate. Due to the existence of the condensation high pressure and the evaporation low pressure, the refrigeration system quickly rebuilds a new pressure balance.

[0123] Reference Figure 6 , Figure 6 FIG. is a schematic structural diagram of a control device for a refrigeration system provided by an embodiment of the present application. A control device for a refrigeration system provided by an embodiment of the present application, the refrigeration system includes: a refrigeration circuit, the refrigeration circuit includes a first pipeline on-off component, an evaporator, a second pipeline on-off component, a compressor, a third pipeline on-off component, and a condenser connected in series in sequence, and a pressure regulating device is arranged between the suction port and the exhaust port of the compressor; the device includes: a determination module 601, an adjustment module 602, and a control module 603. The determination module 601 is configured to determine whether the refrigeration circuit is conducting when it is determined that the compressor needs to start after shutdown during the refrigeration process of the refrigeration system; the adjustment module 602 is configured to control the startup of the compressor and control the operation of the pressure regulating device to adjust the pressure difference between the suction port and the exhaust port when it is determined that the refrigeration circuit is not conducting; the control module 603 is configured to control the pressure regulating device to stop working and control the first pipeline on-off component, the second pipeline on-off component, and the third pipeline on-off component after the pressure difference between the suction port and the exhaust port is adjusted, so that the refrigeration circuit is conducting.

[0124] In this embodiment, the pressure regulating device includes a pressure balancing pipeline, a throttling pipeline and a pipeline switching component. The pressure balancing pipeline and the throttling pipeline are connected to the suction port of the compressor. The pipeline switching component is arranged at the connection between the pressure balancing pipeline and the exhaust port of the compressor, and the throttling pipeline is also connected to the pipeline switching component.

[0125] In this embodiment, the adjustment module 602 is further used for:

[0126] Controlling the pipeline switching element so that the air intake port and the air exhaust port are connected through the pressure balance pipeline to adjust the pressure balance between the air intake port and the air exhaust port;

[0127] After the pressure balance adjustment between the intake port and the exhaust port is completed, the compressor is controlled to start, and the pipeline switching component is controlled so that the intake port and the exhaust port are connected through the throttling pipeline to adjust the pressure difference between the intake port and the exhaust port.

[0128] In this embodiment, the adjustment module 602 is further used for:

[0129] After the air intake port and the air exhaust port are connected through the pressure balance pipeline, determining the duration of the connection between the air intake port and the air exhaust port;

[0130] When the duration is greater than or equal to a preset duration threshold, it is determined that the pressure balance adjustment between the intake port and the exhaust port is completed, and the preset duration threshold is used to characterize the lower limit value of the duration corresponding to the completion of the pressure balance adjustment between the intake port and the exhaust port.

[0131] In this embodiment, a first pressure detection component is provided between the pressure regulating device and the evaporator, and a second pressure detection component is provided between the pressure regulating device and the air intake port.

[0132] In this embodiment, the adjustment module 602 is further used for:

[0133] After adjusting the pressure difference between the air intake port and the air exhaust port, obtaining a first pressure value corresponding to the evaporator detected by the first pressure detection component and a second pressure value corresponding to the air intake port detected by the second pressure detection component;

[0134] determining an absolute value of a difference between the first pressure value and the second pressure value;

[0135] When the absolute value of the difference is less than a preset difference threshold, it is determined that the pressure difference adjustment between the intake port and the exhaust port is completed. The preset difference threshold is used to characterize the upper limit value of the absolute value of the difference corresponding to the completion of the pressure difference adjustment between the intake port and the exhaust port.

[0136] In this embodiment, the control module 603 is further used for:

[0137] If it is determined that the compressor needs to be shut down, the compressor is controlled to be shut down, and the first pipeline on-off component, the second pipeline on-off component and the third pipeline on-off component are controlled to make the refrigeration circuit not conductive.

[0138] In this embodiment, the control module 603 is further used for:

[0139] When the refrigeration system is started, obtaining a target start and stop number of times corresponding to the compressor and a target working time corresponding to the compressor;

[0140] Determining a target remaining service life corresponding to the pipeline switching component according to the target number of starts and stops and the target working time;

[0141] When the target remaining service life is greater than a preset service life threshold, during the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after shutdown, it is determined whether the refrigeration circuit is turned on, and the preset service life threshold is used to represent the minimum remaining service life that allows the pipeline switching component to work.

[0142] In this embodiment, the control module 603 is further used for:

[0143] Determine a first remaining service life corresponding to the target start and stop times based on a first association relationship, wherein the first association relationship stores a plurality of corresponding relationships between the start and stop times corresponding to the compressor and the remaining service life corresponding to the pipeline switching component;

[0144] Based on a second association relationship, determining a second remaining service life corresponding to the target working time, wherein the second association relationship stores a plurality of corresponding relationships between the working time corresponding to the compressor and the remaining service life corresponding to the pipeline switching component;

[0145] An average value between the first remaining useful life and the second remaining useful life is determined to obtain a target remaining useful life corresponding to the pipeline switching component.

[0146] In this embodiment, the control module 603 is further used for:

[0147] Acquire a training sample set, wherein the training sample set includes a plurality of sets of correspondences between the historical start and stop times and the historical working hours corresponding to the compressor and the historical remaining service life corresponding to the pipeline switching component;

[0148] Using the training sample set to train a preset machine learning model to obtain a life prediction model, wherein the life prediction model is used to predict the remaining service life corresponding to the pipeline switching component;

[0149] The target number of starts and stops and the target working time are input into the life prediction model, so that the life prediction model outputs the target remaining service life corresponding to the pipeline switching component.

[0150] The present embodiment provides a control device for a refrigeration system, by arranging a first pipeline switch between the evaporator and the condenser, a second pipeline switch between the evaporator and the compressor, a third pipeline switch between the compressor and the condenser, and a pressure regulating device between the air intake port and the air exhaust port of the compressor, so that when the compressor needs to be shut down, the refrigeration circuit is controlled to be non-conductive, thereby completely separating the evaporator and the condenser. When the compressor is restarted, since the evaporator and the condenser are completely separated, the compressor can be controlled to start and the pressure regulating device can be controlled to work, so that a pressure difference is established between the air intake port of the compressor and the air exhaust port of the compressor. After the pressure difference is established, the first pipeline switch, the second pipeline switch and the third pipeline switch can be controlled to make the refrigeration circuit conductive. In this way, the impact on the compressor caused by the pressure difference between the evaporator and the condenser when the compressor is started can be avoided, thereby improving the service life of the compressor and ensuring the operating reliability of the compressor.

[0151] Figure 7 This is a schematic diagram of another refrigeration system provided in an embodiment of the present application. Figure 7 The refrigeration system 700 shown includes: a refrigeration circuit, at least one processor 701, a memory 702, at least one network interface 704 and other user interfaces 703. The refrigeration circuit includes a first pipeline switch, an evaporator, a second pipeline switch, a compressor, a third pipeline switch and a condenser connected in series in sequence, and a pressure regulating device is provided between the suction port of the compressor and the exhaust port of the compressor. The various components in the refrigeration system 700 are coupled together through a bus system 705. It can be understood that the bus system 705 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, in Figure 7 Various buses are labeled as bus system 705.

[0152] The user interface 703 may include a display, a keyboard, or a pointing device (eg, a mouse, a trackball, a touch pad, or a touch screen).

[0153] It can be understood that the memory 702 in the embodiment of the present invention can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct RAM bus random access memory (DRRAM). The memory 702 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0154] In some implementations, the memory 702 stores the following elements, executable units or data structures, or a subset thereof, or an extended set thereof: an operating system 7021 and an application program 7022 .

[0155] The operating system 7021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., which are used to implement various basic services and process hardware-based tasks. The application 7022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., which are used to implement various application services. The program for implementing the method of the embodiment of the present invention can be included in the application 7022.

[0156] In an embodiment of the present invention, by calling a program or instruction stored in the memory 702, specifically, the program or instruction stored in the application 7022, the processor 701 is used to execute the method steps provided by each method embodiment, for example, including: during the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after being shut down, determining whether the refrigeration circuit is turned on; when it is determined that the refrigeration circuit is not turned on, controlling the compressor to start, and controlling the pressure regulating device to work to adjust the pressure difference between the suction port and the exhaust port; after the pressure difference adjustment between the suction port and the exhaust port is completed, controlling the pressure regulating device to stop working, and controlling the first pipeline on-off device, the second pipeline on-off device and the third pipeline on-off device to make the refrigeration circuit turned on.

[0157] The method disclosed in the above embodiment of the present invention can be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 701 or the instruction in the form of software. The above processor 701 can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor to execute, or the hardware and software units in the decoding processor can be executed. The software unit can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702 and completes the steps of the above method in combination with its hardware.

[0158] It is understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPDevice, DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in the present application, or a combination thereof.

[0159] For software implementation, the technology described herein can be implemented by a unit that performs the functions described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0160] The refrigeration system provided in this embodiment can be as follows Figure 7 The refrigeration system shown in FIG. 1 may be implemented as follows: Figure 2~Figure 5 All steps of the control method of the refrigeration system in the Figure 2~Figure 5 For details, please refer to Figure 2~Figure 5 For the sake of brevity, the relevant description is not repeated here.

[0161] The embodiment of the present invention further provides a storage medium (computer-readable storage medium). The storage medium here stores one or more programs. The storage medium may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a read-only memory, a flash memory, a hard disk or a solid-state drive; the memory may also include a combination of the above-mentioned types of memory.

[0162] When one or more programs in the storage medium can be executed by one or more processors, the control method of the refrigeration system executed on the control device side of the refrigeration system can be implemented.

[0163] The processor is used to execute a control program of the refrigeration system stored in the memory to implement the following steps of a control method of the refrigeration system executed on the control device side of the refrigeration system: during the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after being shut down, determine whether the refrigeration circuit is turned on; when it is determined that the refrigeration circuit is not turned on, control the compressor to start, and control the pressure regulating device to work to adjust the pressure difference between the suction port and the exhaust port; after the pressure difference adjustment between the suction port and the exhaust port is completed, control the pressure regulating device to stop working, and control the first pipeline on-off component, the second pipeline on-off component and the third pipeline on-off component to make the refrigeration circuit turned on.

[0164] The professionals should further realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0165] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0166] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control method for a refrigeration system, characterized in that: The refrigeration system comprises: a refrigeration circuit, the refrigeration circuit comprises a first pipeline switch, an evaporator, a second pipeline switch, a compressor, a third pipeline switch and a condenser which are connected in series in sequence, a pressure regulating device is arranged between the air intake port of the compressor and the air discharge port of the compressor, the pressure regulating device comprises a pressure balancing pipeline, a throttling pipeline and a pipeline switching component, the pressure balancing pipeline and the throttling pipeline are connected to the air intake port of the compressor, the pipeline switching component is arranged at the connection between the pressure balancing pipeline and the air discharge port of the compressor, and the throttling pipeline is also connected to the pipeline switching component; the method comprises: During the refrigeration process of the refrigeration system, if it is determined that the compressor needs to be started after being stopped, determining whether the refrigeration circuit is connected; When it is determined that the refrigeration circuit is not conducting, the compressor is controlled to start, and the pressure regulating device is controlled to operate to adjust the pressure difference between the suction port and the exhaust port, including: Controlling the pipeline switching element so that the air intake port and the air exhaust port are connected through the pressure balance pipeline to adjust the pressure balance between the air intake port and the air exhaust port; After the pressure balance adjustment between the air intake port and the air discharge port is completed, the compressor is controlled to start, and the pipeline switching element is controlled so that the air intake port and the air discharge port are connected through the throttling pipeline to adjust the pressure difference between the air intake port and the air discharge port; After the pressure difference adjustment between the air intake port and the air exhaust port is completed, the pressure regulating device is controlled to stop working, and the first pipeline switch, the second pipeline switch and the third pipeline switch are controlled to make the refrigeration circuit conductive.

2. The method according to claim 1, characterized in that The pressure balance adjustment between the air intake port and the air exhaust port is completed by: After the air intake port and the air exhaust port are connected through the pressure balance pipeline, determining the duration of the connection between the air intake port and the air exhaust port; When the duration is greater than or equal to a preset duration threshold, it is determined that the pressure balance adjustment between the intake port and the exhaust port is completed, and the preset duration threshold is used to characterize the lower limit value of the duration corresponding to the completion of the pressure balance adjustment between the intake port and the exhaust port.

3. The method according to claim 1, characterized in that A first pressure detection component is provided between the pressure regulating device and the evaporator, and a second pressure detection component is provided between the pressure regulating device and the air intake port; The pressure difference adjustment between the air intake port and the air exhaust port is completed by: After adjusting the pressure difference between the air intake port and the air exhaust port, obtaining a first pressure value corresponding to the evaporator detected by the first pressure detection component and a second pressure value corresponding to the air intake port detected by the second pressure detection component; determining an absolute value of a difference between the first pressure value and the second pressure value; When the absolute value of the difference is less than a preset difference threshold, it is determined that the pressure difference adjustment between the intake port and the exhaust port is completed. The preset difference threshold is used to characterize the upper limit value of the absolute value of the difference corresponding to the completion of the pressure difference adjustment between the intake port and the exhaust port.

4. The method according to claim 1, characterized in that Before executing the step of determining whether the refrigeration circuit is connected if it is determined that the compressor needs to be started after being stopped, the method further includes: If it is determined that the compressor needs to be shut down, the compressor is controlled to be shut down, and the first pipeline on-off component, the second pipeline on-off component and the third pipeline on-off component are controlled to make the refrigeration circuit not conductive.

5. The method according to claim 1, characterized in that Before executing the step of determining whether the refrigeration circuit is connected during the refrigeration process of the refrigeration system if it is determined that the compressor needs to be started after being stopped, the method further includes: When the refrigeration system is started, obtaining a target start and stop number of times corresponding to the compressor and a target working time corresponding to the compressor; Determining a target remaining service life corresponding to the pipeline switching component according to the target number of starts and stops and the target working time; When the target remaining service life is greater than a preset service life threshold, the step of determining whether the refrigeration circuit is turned on is performed during the refrigeration process of the refrigeration system if it is determined that the compressor needs to be started after being shut down. The preset service life threshold is used to represent the minimum remaining service life that allows the pipeline switching component to work.

6. The method according to claim 5, characterized in that The determining, according to the target number of starts and stops and the target working time, the target remaining service life corresponding to the pipeline switching component includes: Determine a first remaining service life corresponding to the target start and stop times based on a first association relationship, wherein the first association relationship stores a plurality of corresponding relationships between the start and stop times corresponding to the compressor and the remaining service life corresponding to the pipeline switching component; Based on a second association relationship, determining a second remaining service life corresponding to the target working time, wherein the second association relationship stores a plurality of corresponding relationships between the working time corresponding to the compressor and the remaining service life corresponding to the pipeline switching component; An average value between the first remaining service life and the second remaining service life is determined to obtain a target remaining service life corresponding to the pipeline switching component.

7. The method according to claim 5, characterized in that The determining, according to the target number of starts and stops and the target working time, the target remaining service life corresponding to the pipeline switching component includes: Acquire a training sample set, wherein the training sample set includes a plurality of sets of correspondences between the historical start and stop times and the historical working hours corresponding to the compressor and the historical remaining service life corresponding to the pipeline switching component; Using the training sample set to train a preset machine learning model to obtain a life prediction model, wherein the life prediction model is used to predict the remaining service life corresponding to the pipeline switching component; The target number of starts and stops and the target working time are input into the life prediction model, so that the life prediction model outputs the target remaining service life corresponding to the pipeline switching component.

8. A control device for a refrigeration system, characterized in that: The refrigeration system comprises: a refrigeration circuit, the refrigeration circuit comprises a first pipeline switch, an evaporator, a second pipeline switch, a compressor, a third pipeline switch and a condenser connected in series in sequence, a pressure regulating device is arranged between the air intake port of the compressor and the air discharge port of the compressor, the pressure regulating device comprises a pressure balancing pipeline, a throttling pipeline and a pipeline switching component, the pressure balancing pipeline and the throttling pipeline are connected to the air intake port of the compressor, the pipeline switching component is arranged at the connection between the pressure balancing pipeline and the air discharge port of the compressor, and the throttling pipeline is also connected to the pipeline switching component; the device comprises: A determination module, used to determine whether the refrigeration circuit is connected if it is determined that the compressor needs to be started after being stopped during the refrigeration process of the refrigeration system; A regulating module, for controlling the compressor to start and the compressor regulating device to operate to adjust the pressure difference between the air intake port and the air discharge port when determining that the refrigeration circuit is not conducting; The regulating module is further used to control the pipeline switching component so that the air intake port and the air exhaust port are connected through the pressure balance pipeline to adjust the pressure balance between the air intake port and the air exhaust port; After the pressure balance adjustment between the air intake port and the air discharge port is completed, the compressor is controlled to start, and the pipeline switching element is controlled so that the air intake port and the air discharge port are connected through the throttling pipeline to adjust the pressure difference between the air intake port and the air discharge port; The control module is used to control the pressure regulating device to stop working after the pressure difference adjustment between the suction port and the exhaust port is completed, and to control the first pipeline on-off piece, the second pipeline on-off piece and the third pipeline on-off piece to make the refrigeration circuit conductive.

9. A refrigeration system, characterized in that: include: A refrigeration circuit, a processor and a memory, wherein the refrigeration circuit comprises a first pipeline switch, an evaporator, a second pipeline switch, a compressor, a third pipeline switch and a condenser which are sequentially connected in series, a pressure regulating device is arranged between the air intake port of the compressor and the air discharge port of the compressor, the processor is connected with the first pipeline switch, the second pipeline switch, the third pipeline switch, the compressor, the pressure regulating device and the memory, the pressure regulating device comprises a pressure balancing pipeline, a throttling pipeline and a pipeline switching component, the pressure balancing pipeline and the throttling pipeline are connected with the air intake port of the compressor, the pipeline switching component is arranged at the connection between the pressure balancing pipeline and the air discharge port of the compressor, and the throttling pipeline is also connected with the pipeline switching component; The processor is used to execute the control program of the refrigeration system stored in the memory to implement the control method of the refrigeration system according to any one of claims 1 to 7.

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