Compressor operation control method and device, refrigeration equipment and storage medium

Abstract

The invention provides a compressor operation control method and device, refrigeration equipment and a storage medium, the method is applied to the refrigeration equipment, the refrigeration equipment comprises a compressor and a frequency conversion module, and the compressor is connected with the frequency conversion module. The method comprises the steps that the first module temperature of the frequency conversion module is obtained when the frequency conversion module controls the compressor to operate at the first rotating speed, the temperature change trend of the frequency conversion module is determined based on the first module temperature, and if the temperature change trend is the rising trend, the compressor is controlled to operate at the second rotating speed, and if the temperature change trend is a descending trend, the compressor is controlled to operate at a third rotating speed, the second rotating speed is smaller than the first rotating speed, and the third rotating speed is larger than the first rotating speed. According to the method, the compressor can be controlled to operate efficiently while the frequency conversion module is protected.

Description

Technical Field

[0001] The present application relates to the field of variable frequency refrigeration technology, and more specifically, to a method, device, refrigeration equipment and storage medium for controlling the operation of a compressor in the field of variable frequency refrigeration technology. Background Art

[0002] The compressor can compress the refrigerant (such as Freon, etc.) to a high-pressure state, and plays an important role in achieving the refrigeration function of refrigeration equipment such as air conditioners and refrigerators. For variable frequency compressors, the power supply frequency of the compressor is mainly changed through the variable frequency module. When the temperature of the variable frequency module is high, it will cause the variable frequency module to burn out. Summary of the invention

[0003] The present application provides a method, device, refrigeration equipment and storage medium for controlling the operation of a compressor. The method can protect the frequency conversion module while controlling the efficient operation of the compressor.

[0004] In a first aspect, a method for controlling the operation of a compressor is provided, the method being applied to a refrigeration device, the refrigeration device comprising a compressor and a frequency conversion module, the compressor and the frequency conversion module being connected, the method comprising: obtaining a first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at a first speed; determining a temperature change trend of the frequency conversion module based on the first module temperature; if the temperature change trend is an upward trend, controlling the compressor to operate at a second speed; if the temperature change trend is a downward trend, controlling the compressor to operate at a third speed, the second speed being less than the first speed, and the third speed being greater than the first speed.

[0005] In a second aspect, a device for controlling a refrigeration device is provided, which is applied to the refrigeration device. The refrigeration device includes a compressor and a frequency conversion module. The compressor and the frequency conversion module are connected, and the device includes: an acquisition unit, which is used to acquire the first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at a first speed; a determination unit, which is used to determine the temperature change trend of the frequency conversion module based on the first module temperature; a first control unit, which is used to control the compressor to operate at a second speed if the temperature change trend is an upward trend; and a second control unit, which is used to control the compressor to operate at a third speed if the temperature change trend is a downward trend, the second speed being less than the first speed, and the third speed being greater than the first speed.

[0006] In a third aspect, a refrigeration device is provided, comprising: a memory for storing executable program code; a processor for calling and running the executable program code from the memory, so that the refrigeration device executes the method in the above-mentioned first aspect or any possible implementation of the first aspect.

[0007] In a fourth aspect, a computer program product is provided, comprising: a computer program code, which, when executed on a computer, enables the computer to execute the method in the first aspect or any possible implementation of the first aspect.

[0008] In a fifth aspect, a computer-readable storage medium is provided, which stores a computer program code. When the computer program code runs on a computer, the computer executes the method in the above-mentioned first aspect or any possible implementation manner of the first aspect.

[0009] In an embodiment of the present application, when the temperature change trend is an upward trend, the speed of the compressor is controlled to be reduced, thereby reducing the heat generated by the frequency conversion module when controlling the operation of the compressor, thereby preventing the module temperature of the frequency conversion module from further increasing; and when it is determined that the module temperature of the frequency conversion module shows a downward trend, the speed of the compressor is increased to prevent the compressor from being in a low-power state all the time, thereby protecting the frequency conversion module while controlling the efficient operation of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of a refrigeration device provided in an embodiment of the present application;

[0011] Figure 2 It is a flow chart of a method for controlling the operation of a compressor provided in an embodiment of the present application;

[0012] Figure 3 It is a flow chart of a method for controlling the operation of a compressor provided in an embodiment of the present application;

[0013] Figure 4 It is a flow chart of a method for controlling the operation of a compressor provided in an embodiment of the present application;

[0014] Figure 5 is a structural schematic diagram of a compressor operation control device provided in an embodiment of the present application;

[0015] Figure 6 It is a structural schematic diagram of a refrigeration device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0016] The technical solution in the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0017] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0018] Figure 1 It is a structural schematic diagram of a refrigeration device provided in an embodiment of the present application. When the refrigeration device is running, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant through a compressor, so that the high-temperature and high-pressure gaseous refrigerant releases heat more effectively in the condenser, thereby improving the refrigeration efficiency. For a fixed-frequency compressor, its speed is fixed, that is, it runs at a set frequency, while a variable-frequency compressor adjusts the speed of the compressor by changing the frequency of the alternating current supplied to the compressor through a variable-frequency module, that is, the speed of the compressor is controlled by the variable-frequency module.

[0019] When the inverter module controls the compressor to run at a certain speed, the semiconductor devices (such as IGBT) used inside the inverter module convert DC power into AC power by fast switching. During the switching operation, the devices will have a certain switching loss and generate heat. The higher the speed of the compressor, the higher the switching frequency of the semiconductor devices of the inverter module, the greater the switching loss, and the more heat is generated. If the inverter module always controls the operation of the compressor when the module temperature is high, the performance of the components inside the inverter module will be reduced, and in serious cases, the inverter module will be damaged.

[0020] Based on this, the present application proposes a method for controlling the operation of a compressor. When the refrigeration equipment controls the compressor to perform refrigeration, the first module temperature of the frequency conversion module is obtained when the frequency conversion module controls the compressor to operate at a first speed. The temperature change trend of the frequency conversion module is determined based on the first module temperature. When the temperature change trend is determined to be an upward trend, the compressor is controlled to operate at a second speed. When the temperature change trend is determined to be a downward trend, the compressor is controlled to operate at a third speed, wherein the second speed is less than the first speed and the third speed is greater than the first speed. When the temperature change trend is an upward trend, the speed of the compressor is controlled to be reduced, and the heat generated when the frequency conversion module controls the compressor to operate is reduced, thereby preventing the module temperature of the frequency conversion module from further rising; and when it is determined that the module temperature of the frequency conversion module is showing a downward trend, the speed of the compressor is increased to prevent the compressor from being in a low-power state all the time, thereby protecting the frequency conversion module while controlling the compressor to operate efficiently.

[0021] based on Figure 1 The structural diagram shown below will be combined with Figure 2-Figure 4 , the control method for the operation of the compressor provided in an embodiment of the present application is introduced in detail.

[0022] See also Figure 2 , is a flow chart of a method for controlling the operation of a compressor provided in an embodiment of the present application. Figure 2 As shown, the method of the embodiment of the present application may include the following steps S101-S104.

[0023] S101, obtaining a first module temperature of a frequency conversion module when the frequency conversion module controls the compressor to operate at a first speed;

[0024] Specifically, when the frequency conversion module controls the compressor to run at the first speed, there will be certain switching losses when the semiconductor devices (such as IGBT) in the frequency conversion module convert direct current into alternating current by means of fast switching. These losses will be converted into heat, causing the temperature of the frequency conversion module to rise. The first temperature is the temperature of the frequency conversion module when the compressor is controlled to run at the first speed, which can be obtained by the temperature detection component.

[0025] Optionally, the temperature detection component can be a chip thermistor. The resistance value of the chip thermistor is related to the temperature of its installation position, so after obtaining the resistance of the chip thermistor, the first module temperature in the frequency conversion module can be obtained, wherein the chip thermistor can be placed near the position of the semiconductor device IGBT in the frequency conversion module. It can be understood that the heat generated in the frequency conversion module is mainly generated when the direct current is converted into alternating current through the IGBT. Therefore, by placing the chip thermistor near the semiconductor device IGBT, the first module temperature of the frequency conversion module can be accurately obtained when the frequency conversion module controls the compressor to run at the first speed.

[0026] S102, determining a temperature change trend of the frequency conversion module based on the temperature of the first module;

[0027] In one embodiment, the temperature detection component is used to obtain the first module temperature of the frequency conversion module when multiple frequency conversion modules control the compressor to operate at a first speed, and then the temperature change trend of the frequency conversion module is determined according to the multiple first module temperatures.

[0028] S103, if the temperature change trend is an upward trend, controlling the compressor to operate at a second speed;

[0029] Specifically, when it is determined that the temperature change trend is an upward trend, it means that the frequency conversion module generates a large amount of heat when controlling the compressor to operate at the first speed, causing the module temperature of the frequency conversion module to rise. In order to prevent the module temperature of the frequency conversion module from continuing to rise and reduce the operating performance of the frequency conversion module, it is necessary to reduce the speed of the compressor, that is, control the compressor to operate at the second speed. It is understandable that in the embodiment of the present application, by reducing the speed of the compressor, the frequency of the switching operation performed by the switching element in the frequency conversion module is correspondingly reduced, which can effectively reduce the generated heat and thereby reduce the temperature of the frequency conversion control module.

[0030] Optionally, the second rotational speed may be a preset rotational speed, which is a lower rotational speed when the compressor is running.

[0031] S104: If the temperature change trend is a downward trend, control the compressor to operate at a third speed, where the second speed is less than the first speed and the third speed is greater than the first speed.

[0032] In one embodiment, when it is determined that the temperature change trend is a downward trend, it means that the load of the frequency conversion module is light and the heat generated is small. The compressor can be controlled to operate at a third speed, the speed of the compressor can be increased, and the operating power of the compressor can be improved.

[0033] Optionally, the third speed may be an operating speed of the compressor corresponding to a set cooling capacity.

[0034] In an embodiment of the present application, when the temperature change trend is an upward trend, the speed of the compressor is controlled to be reduced, thereby reducing the heat generated by the frequency conversion module when controlling the operation of the compressor, thereby preventing the module temperature of the frequency conversion module from further increasing; and when it is determined that the module temperature of the frequency conversion module shows a downward trend, the speed of the compressor is increased to prevent the compressor from being in a low-power state all the time, thereby protecting the frequency conversion module while controlling the efficient operation of the compressor.

[0035] See also Figure 3 , is a flow chart of a method for controlling the operation of a compressor provided in an embodiment of the present application. Figure 3As shown, the method of the embodiment of the present application may include the following steps S201-S206.

[0036] S201, obtaining a second module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at a maximum speed;

[0037] In one embodiment, the frequency conversion module controls the compressor to run at a maximum speed, and the temperature of the second module when the frequency conversion module controls the compressor to run at the speed is obtained through the chip thermistor.

[0038] Optionally, in an embodiment of the present application, when the frequency conversion module controls the compressor to run at the maximum speed, the frequency of the chip thermistor collecting the temperature of the second module of the frequency conversion module can be reduced, the time delay of the collected frequency conversion module temperature can be reduced, and the temperature of the frequency conversion module during the control process can be accurately obtained.

[0039] S202, if the temperature of the second module is greater than the temperature threshold, controlling the compressor to operate at a first speed;

[0040] In one embodiment, when it is determined that the temperature of the second module is greater than the temperature threshold, it is determined that when the frequency conversion module controls the compressor to operate at the maximum speed, the temperature of the second module of the frequency conversion module is high, and it is necessary to reduce the operating speed of the compressor to avoid the continuous increase in the temperature of the second module of the frequency conversion module, that is, control the compressor to operate at the first speed to reduce the temperature of the second module of the frequency conversion module.

[0041] In an embodiment of the present application, when the frequency conversion module controls the compressor to operate at the maximum speed, the switching operation frequency of the semiconductor device in the frequency conversion module is relatively high, and the heat generated is relatively large. In order to avoid the semiconductor switch generating more heat by performing switching operations at a higher frequency, when the second module temperature is greater than the temperature threshold, the compressor is directly controlled to operate at the first speed, thereby reducing the operating speed of the compressor and achieving the purpose of quickly reducing the temperature of the frequency conversion module.

[0042] S203, obtaining a first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at a first speed;

[0043] S204, determining a temperature change trend of the frequency conversion module based on the temperature of the first module;

[0044] S205, if the temperature change trend is an upward trend, controlling the compressor to operate at a second speed;

[0045] S206, if the temperature change trend is a downward trend, control the compressor to operate at a third speed, the second speed is less than the first speed, and the third speed is greater than the first speed;

[0046] Specifically, when the frequency conversion module controls the compressor to run at a first speed, the first module temperature of the frequency conversion module is obtained, and then the speed of the compressor is controlled based on the first module temperature. Please refer to the description of steps S101 to S104 in the above-mentioned embodiment of the specification, which will not be repeated here.

[0047] It can be understood that when the frequency conversion module controls the compressor to run at the maximum speed, it is detected that the second module temperature of the frequency conversion module is greater than the temperature threshold, and then the speed of the compressor is reduced to the first speed. When the frequency conversion module controls the compressor to run at the first speed, there is still a problem of too high temperature. In this embodiment, by obtaining the change trend of the first module temperature when the frequency conversion module controls the compressor to run at the first speed, it is determined whether to further reduce the operating speed of the compressor, and then reduce the module temperature of the frequency conversion module. By gradually reducing the operating speed of the compressor, the module temperature of the frequency conversion module is reduced to avoid suddenly reducing the operating speed of the compressor, resulting in a rapid decrease in cooling capacity. Moreover, when the compressor runs at the first speed, the operating speed of the compressor is controlled by the temperature change trend, which can prevent the module temperature of the frequency conversion module from rising to the temperature threshold again, and can control the operating speed of the compressor in advance to reduce the module temperature of the frequency conversion module.

[0048] In one embodiment, when the frequency conversion module controls the compressor to run at the maximum speed, if the temperature of the second module of the frequency conversion module is on a downward trend, the compressor is controlled to run at the maximum speed at the second temperature of the frequency conversion module.

[0049] Further, in the embodiment of the present application, obtaining the first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to run at the first speed includes:

[0050] S301, obtaining a first temperature of the frequency conversion module collected when the frequency conversion module controls the compressor to run at a first speed at a first moment;

[0051] S302, obtaining a second temperature of the frequency conversion module collected when the frequency conversion module controls the compressor to run at a first speed at a second moment;

[0052] In one embodiment, when the frequency conversion module controls the compressor to operate at a first speed, after the duration of the compressor operating at the first speed reaches a first preset duration, it is determined that a first moment is reached and the first temperature of the frequency conversion module is obtained; and after the duration of the compressor operating at the first speed reaches a second preset duration, it is determined that a second moment is reached and the second temperature of the frequency conversion module is obtained, and the first preset duration is less than the second preset duration.

[0053] Exemplarily, in the embodiment of the present application, the first preset time length may be 2 minutes, and the second preset time length may be 3 minutes.

[0054] Further, determining the temperature change trend of the frequency conversion module based on the temperature of the first module includes:

[0055] S303, determining a temperature change trend of the frequency conversion module based on a first temperature and a second temperature, where the first module temperature includes the first temperature and the second temperature.

[0056] In one embodiment, if the first temperature is greater than or equal to the second temperature, the temperature change trend of the frequency conversion module is determined to be a downward trend; if the first temperature is less than the second temperature, the temperature change trend of the frequency conversion module is determined to be an upward trend.

[0057] It can be understood that, when the first moment when the first temperature is collected is before the second moment when the second temperature is collected, when it is determined that the first temperature is greater than or equal to the second temperature, it means that the module temperature collected at the first moment is greater than the module temperature collected at the second moment, and the temperature change trend is determined to be a downward trend; when it is determined that the first temperature is less than the second temperature, it means that the module temperature collected at the first moment is less than the module temperature collected at the second moment, and the temperature change trend is determined to be an upward trend.

[0058] Exemplarily, if the first temperature collected at the first moment is 65 degrees Celsius (℃), and the second temperature collected at the second moment is 76℃, it is determined that the temperature change trend of the frequency conversion module is an upward trend; in another case, if the first temperature collected at the first moment is 70℃, and the second temperature collected at the second moment is 60℃, it is determined that the temperature change trend of the frequency conversion module is a downward trend.

[0059] In an embodiment of the present application, by controlling the compressor to operate at a first speed when the compressor is running at a maximum speed and collecting a second module temperature of the frequency conversion module that is greater than or equal to a temperature threshold, thereby reducing the operating speed of the compressor, and then reducing the module temperature of the frequency conversion module, it is possible to avoid the module temperature of the frequency conversion module being too high and affecting the control performance of the frequency conversion module; and by collecting a first temperature when the frequency conversion module controls the compressor to operate at a first speed at a first moment, and a second temperature when the frequency conversion module controls the compressor to operate at the first speed at a second moment, the temperature change trend of the frequency conversion module is determined by the first temperature and the second temperature, and the temperature change trend of the frequency conversion module is determined by the actually collected temperatures of the frequency conversion module at different moments, so that the temperature change trend of the frequency conversion module can be accurately determined; and when the first temperature is greater than or equal to the second temperature, the temperature change trend of the frequency conversion module is determined to be a downward trend, and when the first temperature is less than the second temperature, the change trend of the frequency conversion module is determined to be an upward trend, thereby achieving accurate determination of the temperature change trend of the frequency conversion module.

[0060] See also Figure 4 , is a flow chart of a method for controlling the operation of a compressor provided in an embodiment of the present application. Figure 4As shown, the method of the embodiment of the present application may include the following steps S401-S404.

[0061] S401, obtaining a first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at a first speed;

[0062] S402, determining a temperature change trend of the frequency conversion module based on the temperature of the first module;

[0063] For details, please refer to the description of step S101 to step S102 in the above embodiment of the specification, which will not be repeated here.

[0064] S403, if the first speed is the minimum speed of the compressor and the temperature change trend is an upward trend, control to turn off the compressor;

[0065] In one embodiment, after determining that the first speed is the minimum speed of the compressor and the temperature change trend is an upward trend, it is determined that when the compressor is currently controlled to operate at the minimum speed, the module temperature of the frequency conversion module will continue to rise, so the compressor is controlled to be turned off, that is, the frequency conversion module is also controlled to stop controlling the compressor. In this way, the frequency conversion module will no longer continue to generate heat, thereby preventing the module temperature of the frequency conversion module from continuing to rise and damaging the internal components of the frequency conversion module.

[0066] S404: If the first speed is not the minimum speed of the compressor and the temperature change trend is an upward trend, control the compressor to run at a second speed.

[0067] In one embodiment, when it is determined that the first speed is not the minimum speed of the compressor and the temperature change trend is an upward trend, and it is determined that the operating speed of the compressor can still be further reduced, the compressor is controlled to operate at a second speed. By reducing the operating speed of the compressor, the heat generated by the frequency conversion module when controlling the compressor to operate is reduced.

[0068] Furthermore, in an embodiment of the present application, when it is determined that the temperature change trend is an upward trend and the compressor is controlled to operate at a second speed, specifically: when the temperature change trend is an upward trend, the first temperature change rate of the upward trend is obtained, and then based on the first change interval in which the first temperature change rate is located, the second speed of the compressor corresponding to the first change interval is determined, and the compressor is controlled to operate at the second speed.

[0069] Specifically, there are multiple first change intervals, and each change interval corresponds to a second speed. The greater the first temperature change rate, the smaller the second speed of the change interval corresponding to the first temperature change rate. By controlling the compressor to run at a lower speed when the temperature rises rapidly, the temperature of the frequency conversion module can be prevented from continuing to rise.

[0070] Further, in an embodiment of the present application, when it is determined that the temperature change trend is a downward trend and the compressor is controlled to operate at a third speed, specifically: when the temperature change trend is a downward trend, the second temperature change rate of the downward trend is obtained, and then based on the second change interval in which the second temperature change rate is located, the third speed of the compressor corresponding to the second change interval is determined, and the compressor is controlled to operate at the third speed.

[0071] Specifically, there are multiple second change intervals, and each change interval corresponds to a third speed. The greater the second temperature change rate, the greater the third speed of the change interval corresponding to the second temperature change rate. By controlling the compressor to operate at a higher speed when the temperature drops rapidly, the operating efficiency of the compressor can be improved.

[0072] In an embodiment of the present application, when the compressor is running at the minimum speed and it is detected that the temperature change trend of the frequency conversion module is an upward trend, the compressor is controlled to be shut down, so as to prevent the frequency conversion module from continuing to control the operation of the compressor, causing its module temperature to continue to rise and damaging the internal components of the frequency conversion module; and when the temperature change trend is an upward trend, by determining the second speed corresponding to the first change interval of the first temperature change rate, and controlling the compressor to operate at the second speed, it is possible to effectively prevent the module temperature of the frequency conversion module from continuing to rise; when the temperature change trend is a downward trend, by removing the third speed corresponding to the second change interval of the second temperature change rate, and controlling the compressor to operate at the third speed, it is possible to improve the operating efficiency of the compressor.

[0073] based on Figure 1 The structural diagram of Figure 5 , the control device for the operation of the compressor provided in the embodiment of the present application is introduced in detail. It should be noted that, Figure 5 A control device for the operation of a compressor in the present application Figure 2-Figure 4 For the convenience of explanation, only the part related to the embodiment of the present application is shown. For the specific technical details not disclosed, please refer to the present application. Figure 2-Figure 4 Specifically, the control device 1 for the operation of the compressor comprises:

[0074] An acquisition unit 11 is used to acquire a first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at a first speed;

[0075] A determination unit 12, configured to determine a temperature change trend of the frequency conversion module based on the temperature of the first module;

[0076] A first control unit 13 is used to control the compressor to operate at a second speed if the temperature change trend is an upward trend;

[0077] The second control unit 14 is used to control the compressor to operate at a third speed if the temperature change trend is a downward trend. The second speed is lower than the first speed, and the third speed is higher than the first speed.

[0078] Optionally, the compressor operation control device 1 further includes:

[0079] The temperature acquisition unit 15 is used to acquire the second module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at the maximum speed;

[0080] The third control unit 16 is configured to control the compressor to operate at a first speed if the temperature of the second module is greater than or equal to a temperature threshold.

[0081] Optionally, the first control unit 13 includes:

[0082] The first control subunit 131 is used for controlling to turn off the compressor if the first speed is the minimum speed of the compressor and the temperature change trend is an upward trend;

[0083] The second control subunit 132 is used to control the compressor to run at a second speed if the first speed is not the minimum speed of the compressor and the temperature change trend is an upward trend.

[0084] Optionally, the acquiring unit 11 includes:

[0085] The first acquisition subunit 111 is used to acquire a first temperature of the frequency conversion module collected when the frequency conversion module controls the compressor to run at a first speed at a first moment;

[0086] The second acquisition subunit 112 is used to acquire a second temperature of the frequency conversion module collected when the frequency conversion module controls the compressor to run at the first speed at a second moment;

[0087] Determining a temperature change trend of the frequency conversion module based on the temperature of the first module includes:

[0088] The first determining subunit 113 is used to determine the temperature change trend of the frequency conversion module based on the first temperature and the second temperature, where the first module temperature includes the first temperature and the second temperature.

[0089] Optionally, the first determining subunit 113 is specifically configured to:

[0090] If the first temperature is greater than or equal to the second temperature, determining that the temperature change trend of the frequency conversion module is a downward trend;

[0091] If the first temperature is lower than the second temperature, it is determined that the temperature change trend of the frequency conversion module is an upward trend.

[0092] Optionally, the first control unit 13 includes:

[0093] The third acquisition subunit 131 is used to acquire a first change interval of the first temperature change rate if the temperature change trend is an upward trend;

[0094] A second determining subunit 132, configured to determine a second speed of the compressor corresponding to the first variation interval;

[0095] The third control subunit 133 is used to control the compressor to operate at a second speed.

[0096] Optionally, the first control unit 13 includes:

[0097] The fourth acquisition subunit 134 is used to acquire the second change interval of the second temperature change rate if the temperature change trend is a downward trend;

[0098] A third determining subunit 135, configured to determine a third speed of the compressor corresponding to the second variation interval;

[0099] The fourth control subunit 136 is used to control the compressor to operate at a third speed.

[0100] In an embodiment of the present application, when the temperature change trend is an upward trend, the speed of the compressor is controlled to be reduced, thereby reducing the heat generated by the frequency conversion module when controlling the operation of the compressor, thereby preventing the module temperature of the frequency conversion module from further increasing; and when it is determined that the module temperature of the frequency conversion module shows a downward trend, the speed of the compressor is increased to prevent the compressor from being in a low-power state all the time, thereby protecting the frequency conversion module while controlling the efficient operation of the compressor.

[0101] See also Figure 6 , which is a schematic diagram of the structure of a refrigeration device provided in an embodiment of the present application. Figure 6 As shown, the refrigeration device 500 includes a processor 501 and a memory 502. The processor 501 is electrically connected to the memory 502.

[0102] The processor 501 is the control center of the refrigeration equipment 500 and may include one or more processing cores. The processor 501 uses various interfaces and lines to connect various parts of the entire refrigeration equipment 500, and executes various functions and processes data of the refrigeration equipment 500 by running or calling computer programs stored in the memory 502, and calling data stored in the memory 502, so as to control the refrigeration equipment 500 as a whole. Optionally, the processor 501 can be implemented in at least one hardware form of digital signal processing (DSP), field programmable gate array (FPGA), and programmable logic array (PLA). The processor 501 can integrate one or a combination of CPU, graphics processing unit (GPU), modem, etc. Among them, the CPU mainly processes the operating system, user pages, and applications; the GPU is responsible for rendering and drawing display content; and the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 501, but may be implemented separately through a communication chip.

[0103] The memory 502 can be used to store software programs and modules, and the processor 501 executes various functional applications and data processing by running the computer programs and modules stored in the memory 502. The memory 502 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, a computer program required for at least one function, etc.; the data storage area can store data created according to the use of the refrigeration device 500, etc.

[0104] In addition, the memory 502 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device. Accordingly, the memory 502 may also include a memory controller to provide the processor 501 with access to the memory 502.

[0105] In this embodiment, the processor 501 in the refrigeration device 500 loads instructions corresponding to the processes of one or more computer programs into the memory 502 according to the following steps, and the processor 501 runs the computer program stored in the memory 502 to implement various functions, as follows:

[0106] Acquire a first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at a first speed;

[0107] Determine a temperature change trend of the frequency conversion module based on the temperature of the first module;

[0108] If the temperature change trend is an upward trend, the compressor is controlled to run at a second speed;

[0109] If the temperature change trend is a downward trend, the compressor is controlled to run at a third speed, the second speed is less than the first speed, and the third speed is greater than the first speed.

[0110] Optionally, before executing the step of obtaining the first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to run at the first speed, the processor 501 further executes:

[0111] Acquire the second module temperature of the frequency conversion module when the frequency conversion module controls the compressor to run at the maximum speed;

[0112] If the temperature of the second module is greater than or equal to the temperature threshold, the compressor is controlled to operate at a first speed.

[0113] Optionally, when the processor 501 executes the command "if the temperature change trend is an upward trend, then control the compressor to run at the second speed", the processor 501 specifically executes:

[0114] If the first speed is the minimum speed of the compressor and the temperature change trend is an upward trend, the compressor is controlled to be turned off;

[0115] If the first speed is not the minimum speed of the compressor and the temperature change trend is an upward trend, the compressor is controlled to operate at the second speed.

[0116] Optionally, when the processor 501 executes the process of obtaining the first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to run at the first speed, the processor 501 specifically executes:

[0117] Acquire a first temperature of the frequency conversion module collected when the frequency conversion module controls the compressor to run at a first speed at a first moment;

[0118] Acquire a second temperature of the frequency conversion module collected when the frequency conversion module controls the compressor to run at the first speed at the second moment;

[0119] Determining a temperature change trend of the frequency conversion module based on the temperature of the first module includes:

[0120] The temperature change trend of the frequency conversion module is determined based on the first temperature and the second temperature, where the first module temperature includes the first temperature and the second temperature.

[0121] Optionally, when the processor 501 determines the temperature change trend of the frequency conversion module based on the first temperature and the second temperature, the processor 501 specifically performs:

[0122] If the first temperature is greater than or equal to the second temperature, determining that the temperature change trend of the frequency conversion module is a downward trend;

[0123] If the first temperature is lower than the second temperature, it is determined that the temperature change trend of the frequency conversion module is an upward trend.

[0124] Optionally, when the processor 501 executes the command "if the temperature change trend is an upward trend, then control the compressor to run at the second speed", the processor 501 specifically executes:

[0125] If the temperature change trend is an upward trend, obtaining a first change interval in which the first temperature change rate is located;

[0126] determining a second rotation speed of the compressor corresponding to the first variation interval;

[0127] The compressor is controlled to operate at a second speed.

[0128] Optionally, when the processor 501 executes the command "if the temperature change trend is a downward trend, then control the compressor to operate at the third speed", the processor 501 specifically executes:

[0129] If the temperature change trend is a downward trend, obtaining a second change interval in which the second temperature change rate is located;

[0130] determining a third speed of the compressor corresponding to the second variation interval;

[0131] The compressor is controlled to run at the third speed.

[0132] In an embodiment of the present application, when the temperature change trend is an upward trend, the speed of the compressor is controlled to be reduced, thereby reducing the heat generated by the frequency conversion module when controlling the operation of the compressor, thereby preventing the module temperature of the frequency conversion module from further increasing; and when it is determined that the module temperature of the frequency conversion module shows a downward trend, the speed of the compressor is increased to prevent the compressor from being in a low-power state all the time, thereby protecting the frequency conversion module while controlling the efficient operation of the compressor.

[0133] It should be understood that the device provided in the embodiment of the present application is used to execute the above-mentioned control method for the operation of a compressor, and thus can achieve the same effect as the above-mentioned implementation method.

[0134] In the case of an integrated unit, the device may include a processing module and a storage module. When the device is applied to a refrigeration device, the processing module may be used to control and manage the actions of the refrigeration device. The storage module may be used to support the refrigeration device in executing related program codes, etc.

[0135] The processing module may be a processor or a controller, which may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module may be a memory.

[0136] In addition, the device provided in the embodiment of the present application can specifically be a chip, component or module, and the chip may include a connected processor and memory; wherein the memory is used to store instructions, and when the processor calls and executes the instructions, the chip can execute a compressor operation control method provided in the above embodiment.

[0137] An embodiment of the present application also provides a computer-readable storage medium, in which a computer program code is stored. When the computer program code is executed on a computer, the computer executes the above-mentioned related method steps to implement a compressor operation control method provided in the above embodiment.

[0138] This embodiment further provides a computer program product. When the computer program product is run on a computer, the computer is enabled to execute the above-mentioned related steps to implement a method for controlling the operation of a compressor provided in the above embodiment.

[0139] Among them, the device, computer-readable storage medium, computer program product or chip provided in this embodiment is used to execute the corresponding method provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above, and will not be repeated here.

[0140] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0141] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0142] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for controlling the operation of a compressor, characterized in that: Applied to a refrigeration device, the refrigeration device includes a compressor and a frequency conversion module, the compressor and the frequency conversion module are connected, and the method includes: Acquire a first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at a first speed; Determining a temperature change trend of the frequency conversion module based on the temperature of the first module; If the temperature change trend is an upward trend, controlling the compressor to operate at a second speed; If the temperature change trend is a downward trend, the compressor is controlled to operate at a third speed, the second speed is less than the first speed, and the third speed is greater than the first speed.

2. The method according to claim 1, characterized in that Before obtaining the first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at the first speed, the method further includes: Acquire the second module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at the maximum speed; If the temperature of the second module is greater than or equal to the temperature threshold, the compressor is controlled to operate at the first speed.

3. The method according to claim 1, characterized in that If the temperature change trend is an upward trend, controlling the compressor to operate at a second speed includes: If the first speed is the minimum speed of the compressor and the temperature change trend is an upward trend, controlling to turn off the compressor; If the first speed is not the minimum speed of the compressor and the temperature change trend is an upward trend, the compressor is controlled to operate at the second speed.

4. The method according to claim 1, characterized in that The step of obtaining the first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at a first speed includes: Acquire a first temperature of the frequency conversion module collected when the frequency conversion module controls the compressor to run at a first speed at a first moment; Acquire a second temperature of the frequency conversion module collected when the frequency conversion module controls the compressor to operate at a first speed at a second moment; The determining the temperature change trend of the frequency conversion module based on the first module temperature includes: The temperature change trend of the frequency conversion module is determined based on the first temperature and the second temperature, where the first module temperature includes a first temperature and a second temperature.

5. The method according to claim 4, characterized in that The determining the temperature change trend of the frequency conversion module based on the first temperature and the second temperature includes: If the first temperature is greater than or equal to the second temperature, determining that the temperature change trend of the frequency conversion module is a downward trend; If the first temperature is lower than the second temperature, it is determined that the temperature change trend of the frequency conversion module is an upward trend.

6. The method according to claim 1, characterized in that If the temperature change trend is an upward trend, controlling the compressor to operate at a second speed includes: If the temperature change trend is an upward trend, obtaining a first change interval in which the first temperature change rate is located; determining a second speed of the compressor corresponding to the first variation interval; The compressor is controlled to operate at a second speed.

7. The method according to claim 1, characterized in that If the temperature change trend is a downward trend, controlling the compressor to operate at a third speed includes: If the temperature change trend is a downward trend, obtaining a second change interval in which the second temperature change rate is located; determining a third speed of the compressor corresponding to the second variation interval; The compressor is controlled to operate at a third speed.

8. A control device for compressor operation, characterized in that: Applied to refrigeration equipment, the refrigeration equipment includes a compressor and a frequency conversion module, the compressor and the frequency conversion module are connected, and the device includes: An acquisition unit, configured to acquire a first module temperature of the frequency conversion module when the frequency conversion module controls the compressor to operate at a first speed; a determining unit, configured to determine a temperature change trend of the frequency conversion module based on the temperature of the first module; a first control unit, configured to control the compressor to operate at a second speed if the temperature change trend is an upward trend; The second control unit is used to control the compressor to operate at a third speed if the temperature change trend is a downward trend, the second speed is less than the first speed, and the third speed is greater than the first speed.

9. A refrigeration device, characterized in that: The refrigeration equipment comprises: A memory for storing executable program codes; A processor is used to call and run the executable program code from the memory, so that the refrigeration equipment executes the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program code, and when the computer program code is executed, the method according to any one of claims 1 to 7 is implemented.

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