Compressor control method, device, household appliance and storage medium

Abstract

The present application relates to a compressor control method, device, household appliance, and storage medium. The method includes: upon successful startup of the compressor, determining whether the compressor is in reverse rotation based on a comparison result between the compressor's outlet pressure and inlet pressure; if the compressor's rotation state is determined to be reverse rotation, determining a reverse rotation processing scheme, i.e., a reverse rotation control scheme, based specifically on the compressor type; and controlling the compressor to perform reverse rotation processing according to the reverse rotation control scheme, thereby solving the problem of how to detect and process compressor reverse rotation.

Description

Technical Field

[0001] The present application relates to the field of compressor control, and in particular to a compressor control method, device, household appliance and storage medium. Background Art

[0002] Due to the unique internal operating conditions of compressors, position sensors are not suitable for installation. Therefore, traditional control systems employ a back-electromotive force (BEMF) observer to calculate the compressor rotor position, thus achieving sensorless motor control. During R&D and production, the three-phase wiring of compressors can be reversed. This can damage and render the compressor useless during startup. Therefore, a method for detecting and addressing compressor reverse rotation is urgently needed. This method aims to monitor and assess whether the compressor is rotating in reverse, allowing for timely switching of control strategies to minimize losses. Summary of the Invention

[0003] The present application provides a compressor control method, device, household appliance and storage medium to solve the problem of how to detect and process compressor reversal.

[0004] In a first aspect, the present application provides a compressor control method, the method comprising:

[0005] When the compressor is successfully started, determining the rotation state of the compressor according to the detection results of the air outlet pressure and the air inlet pressure of the compressor;

[0006] When the rotation state is reverse, determining a corresponding reverse control scheme according to the compressor type of the compressor;

[0007] The compressor is controlled according to the reverse control scheme.

[0008] Optionally, when the compressor is successfully started, determining the rotation state of the compressor according to detection results of the air outlet pressure and the air inlet pressure of the compressor includes:

[0009] When a startup instruction for the compressor is obtained, the compressor is started;

[0010] When the startup time of the compressor reaches a preset time, obtaining a closed-loop startup state and an open-loop startup state of the compressor;

[0011] When the closed-loop startup state and / or the open-loop startup state of the compressor is successful, the rotation state of the compressor is determined according to the detection results of the outlet pressure and the inlet pressure of the compressor.

[0012] Optionally, when the startup duration of the compressor reaches a preset duration, after obtaining the closed-loop startup state and the open-loop startup state of the compressor, the method further includes:

[0013] When the compressor fails to start in both the closed-loop startup state and the open-loop startup state, obtaining the outlet pressure of the compressor;

[0014] When the air outlet pressure of the compressor is greater than a first threshold, the compressor is controlled to stop for a specified period of time and then restart.

[0015] Optionally, determining the rotation state of the compressor according to detection results of the air outlet pressure and the air inlet pressure of the compressor includes:

[0016] When it is detected that the pressure at the air outlet of the compressor is greater than or equal to the pressure at the air inlet of the compressor, determining that the rotation state of the compressor is forward rotation;

[0017] When it is detected that the pressure at the air outlet of the compressor is lower than the pressure at the air inlet of the compressor, it is determined that the rotation state of the compressor is reverse rotation.

[0018] Optionally, when the rotation state is reverse rotation, determining a corresponding reverse rotation control scheme according to the compressor type of the compressor includes:

[0019] When the rotation state is reverse, obtaining a compressor type of the compressor;

[0020] When the compressor type of the compressor is a first preset type, determining the software commutation scheme as the reverse rotation control scheme, wherein the compressor of the first preset type supports reverse rotation;

[0021] When the compressor type of the compressor is a second preset type, the shutdown scheme is determined to be the reverse rotation control scheme, wherein the compressor of the second preset type does not support reverse rotation.

[0022] Optionally, controlling the compressor according to the reverse rotation control scheme includes:

[0023] When the reversing control scheme is a software commutation scheme, the compressor is controlled to send a first-phase control signal to the second-phase drive circuit, and a second-phase control signal to the first-phase drive circuit, wherein the first-phase drive circuit is any one of the three-phase drive circuits of the compressor, and the second-phase drive circuit is a drive circuit adjacent to the first-phase drive circuit.

[0024] Optionally, when the inversion control scheme is a software commutation scheme, after controlling the compressor to send the first phase control signal to the second phase drive circuit and the second phase control signal to the first phase drive circuit, the method further includes:

[0025] Restarting the compressor and obtaining a closed-loop startup state and an open-loop startup state of the compressor;

[0026] When the closed-loop startup state and / or the open-loop startup state of the compressor is successful, controlling the compressor to operate normally according to a preset operation mode;

[0027] When both the closed-loop startup state and the open-loop startup state of the compressor fail to start, the compressor is controlled to remain in a shutdown state.

[0028] In a second aspect, the present application provides a compressor control device, the device comprising:

[0029] a reverse rotation detection module, configured to determine the rotation state of the compressor based on the detection results of the air outlet pressure and the air inlet pressure of the compressor when the compressor is successfully started;

[0030] a scheme determination module, configured to determine a corresponding reverse rotation control scheme according to a compressor type of the compressor when the rotation state is reverse rotation;

[0031] A control module is used to control the compressor according to the reverse control scheme.

[0032] In a third aspect, the present application provides a household appliance comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned compressor control method when executing the computer program.

[0033] In a fourth aspect, the present application further provides a computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the above-mentioned compressor control method.

[0034] The above-mentioned technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: the method provided by the embodiment of the present application, when the compressor is successfully started, determines the rotation state of the compressor based on the detection results of the outlet pressure and the inlet pressure of the compressor; when the rotation state is reverse, determines the corresponding reversal control scheme according to the compressor type of the compressor; and controls the compressor according to the reversal control scheme.

[0035] Based on the above method, when the compressor is successfully started, whether the compressor is reversed is judged based on the comparison result between the outlet pressure and the inlet pressure of the compressor. If the rotation state of the compressor is determined to be reverse, the reversal processing plan is determined specifically according to the compressor type of the compressor, that is, the reversal control plan is determined, and the compressor is controlled according to the reversal control plan for reversal processing, thereby solving the problem of how to detect and handle the reversal of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0038] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0039] Figure 1 A flow chart of a compressor control method provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the compressor control topology structure under normal conditions provided in an embodiment of the present application;

[0041] Figure 3 A schematic diagram of the compressor control topology structure after executing the software commutation solution provided in an embodiment of the present application;

[0042] Figure 4 A flow chart of a compressor control method provided in an embodiment of the present application;

[0043] Figure 5 This is a structural block diagram of a compressor control device provided in an embodiment of the present application;

[0044] Figure 6 A schematic diagram of the internal structure of a household appliance provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] The disclosure below provides many different embodiments or examples for implementing different configurations of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0047] In one embodiment, a compressor control method is applied to a compressor control system. The compressor control system includes a compressor and a compressor control device. The compressor and the compressor control device are electrically connected, and the compressor control device is used to control the operating status of the compressor. The compressor control device can be implemented using a standalone server or a server cluster consisting of multiple servers.

[0048] In one embodiment, Figure 1 A flow chart of a compressor control method in one embodiment is shown in FIG. Figure 1 , provides a compressor control method. This embodiment mainly applies this method to the above Figure 1 The compressor control device in the embodiment is used as an example, and the compressor control device and the compressor are applied to household appliances, and the household appliances can specifically be air conditioners or refrigerators. The compressor control method specifically includes the following steps:

[0049] Step S210 , when the compressor is successfully started, the rotation state of the compressor is determined according to the detection results of the air outlet pressure and the air inlet pressure of the compressor.

[0050] Specifically, the power-on command is used to start the compressor. The power-on command is a command triggered by a user operation, or a command triggered periodically according to a preset period based on a preset configuration. Only when the compressor is successfully started can the rotation state of the compressor be detected. The rotation state is used to indicate the rotation direction of the compressor rotor. The rotation state is forward or reverse. Forward means that the three-phase line of the compressor is connected in the right direction. Figure 2 As shown in the control topology of the compressor under normal circumstances, the driver chips IC1 and IC2 control the opening and closing of the upper and lower switching tubes of phase A, and the current sensor collects the A-phase current for control calculation; the driver chips IC3 and IC4 control the opening and closing of the upper and lower switching tubes of phase B, and the current sensor collects the B-phase current for control calculation; the driver chips IC5 and IC6 control the opening and closing of the upper and lower switching tubes of phase C, and the C-phase current can be directly calculated based on the principle that the sum of the three-phase currents of the compressor is 0.

[0051] Pressure sensors are respectively provided at the outlet and inlet of the compressor to detect pressure changes at the outlet or inlet. The pressure sensor reading at the outlet is generally referred to as the system high pressure, that is, the outlet pressure, and the pressure sensor reading at the inlet is generally referred to as the system low pressure, that is, the inlet pressure. The rotation state of the compressor is determined based on the comparison result between the outlet pressure and the inlet pressure. Specifically, the rotation state of the compressor can be determined based on the comparison result between the outlet pressure and the first pressure threshold, as well as the comparison result between the inlet pressure and the second pressure threshold, that is, whether the compressor is reversed is determined based on the comparison relationship between the outlet pressure, the inlet pressure and their respective corresponding pressure thresholds; the rotation state of the compressor can also be determined based on the comparison result between the outlet pressure and the inlet pressure, that is, whether the compressor is reversed is determined based on the comparison result between the outlet pressure and the inlet pressure, thereby solving the problem of how to detect the reversal of the compressor.

[0052] Step S220 : When the rotation state is reverse rotation, a corresponding reverse rotation control scheme is determined according to the compressor type of the compressor.

[0053] Specifically, when determining the reversal of the compressor based on the detection results of the outlet pressure and the inlet pressure, it is necessary to specifically select the corresponding reversal control scheme in combination with the compressor type of the current compressor. The reversal control scheme is used to control the reversal phenomenon of the compressor to eliminate the reversal phenomenon or prohibit the compressor from continuing to reverse. Due to the different hardware structures of different types of compressors, the required reversal control schemes are different. The compressor types are divided into rotary compressors and scroll compressors. The motor of the rotary compressor cannot rotate in the reverse direction due to the cylinder structure (which can be compared to the fact that a ratchet wrench cannot be reversed). Generally, it will get stuck after rotating in the reverse direction for a certain distance, and the phenomenon manifested is that the compressor always fails to start. The scroll compressor can also be reversed due to structural reasons, but it will make the system high pressure lower than the system low pressure.

[0054] Step S230: Control the compressor according to the reverse control scheme.

[0055] Specifically, the compressor is controlled according to a reverse rotation control scheme determined by the compressor type to eliminate the reverse rotation phenomenon or prohibit the compressor from continuing to operate in reverse, thereby solving the problem of how to deal with the reverse rotation of the compressor.

[0056] In one embodiment, when the compressor is successfully started, determining the rotation state of the compressor according to the detection results of the air outlet pressure and the air inlet pressure of the compressor includes:

[0057] When a startup instruction for the compressor is obtained, the compressor is started;

[0058] When the startup time of the compressor reaches a preset time, obtaining a closed-loop startup state and an open-loop startup state of the compressor;

[0059] When the closed-loop startup state and / or the open-loop startup state of the compressor is successful, the rotation state of the compressor is determined according to the detection results of the outlet pressure and the inlet pressure of the compressor.

[0060] Specifically, upon receiving a start-up command from the compressor, the compressor is started according to the start-up command, and the start-up status of the compressor is detected when the start-up time of the compressor reaches a preset time. The start-up status includes a closed-loop start-up status and an open-loop start-up status. The closed-loop start-up status is used to indicate whether the compressor has successfully completed closed-loop startup. Closed-loop startup, also known as closed-loop control, refers to a control method that feeds the output signal back to the input end and adjusts the input signal by comparing the difference between the output signal and the expected signal, thereby controlling the compressor output signal. Closed-loop control has the advantages of automatic adjustment and high precision. The open-loop start-up status is used to indicate whether the compressor has successfully completed open-loop startup. Open-loop startup, also known as open-loop control, refers to a control method that transmits the input signal directly to the output end without monitoring or comparing the output signal. Open-loop control has the advantages of simplicity, intuitiveness, and low cost.

[0061] As long as at least one of the closed-loop startup state and the open-loop startup state is successfully started, the compressor is considered to have started successfully, and the rotation state of the compressor can be detected and judged, that is, the rotation state of the compressor is subsequently determined based on the detection results of the compressor's outlet pressure and inlet pressure.

[0062] In one embodiment, when the startup duration of the compressor reaches a preset duration, after obtaining the closed-loop startup state and the open-loop startup state of the compressor, the method further includes:

[0063] When the compressor fails to start in both the closed-loop startup state and the open-loop startup state, obtaining the outlet pressure of the compressor;

[0064] When the air outlet pressure of the compressor is greater than a first threshold, the compressor is controlled to stop for a specified period of time and then restart.

[0065] Specifically, when both the closed-loop startup state and the open-loop startup state of the compressor fail to start, the compressor is determined to have failed to start. In the case of a compressor failure to start, the rotor cannot rotate, and thus the rotation state of the compressor cannot be detected. Therefore, it is necessary to obtain the compressor outlet pressure to determine whether the compressor has a startup abnormality based on the comparison result between the outlet pressure and a first threshold. Normally, when the compressor fails to start successfully, the outlet pressure is lower than the first threshold. However, when the outlet pressure is detected to be greater than the first threshold, the compressor is determined to have a startup abnormality. Under normal operating conditions, the main reasons for a compressor to fail to work include a large high-low pressure differential in the system (constant startup failure due to heavy load), reverse wiring of the compressor, and damage to the compressor itself. Therefore, it is necessary to control the compressor to stop for a specified time and then restart. The specified time can be customized according to the actual application scenario. For example, the specified time can be 1 minute, 2 minutes, 3 minutes, etc. In this embodiment, the specified time is set to 1 minute. That is, when the compressor startup abnormality is determined, a compressor startup failure fault is output and the compressor is controlled to stop for one minute and then restart. After restarting, the compressor still follows the above steps to obtain the compressor startup status.

[0066] When the number of restart cycles reaches the preset number, it means that the compressor cannot be successfully started after multiple restarts, so the compressor is controlled to remain in a stopped state to avoid frequent restarts of the compressor in the event of a startup failure, which may aggravate the degree of the compressor failure.

[0067] In one embodiment, determining the rotation state of the compressor according to the detection results of the outlet pressure and the inlet pressure of the compressor includes:

[0068] When it is detected that the pressure at the air outlet of the compressor is greater than or equal to the pressure at the air inlet of the compressor, determining that the rotation state of the compressor is forward rotation;

[0069] When it is detected that the pressure at the air outlet of the compressor is lower than the pressure at the air inlet of the compressor, it is determined that the rotation state of the compressor is reverse rotation.

[0070] Specifically, if a compressor has not been running for a long time, the compressor's outlet pressure and inlet pressure will be consistent. After operation, as the gas is compressed, the outlet pressure will gradually increase, so under normal circumstances, the outlet pressure will not be lower than the inlet pressure. Therefore, if the outlet pressure is detected to be greater than the inlet pressure, the compressor can be determined to be in the forward rotation state; conversely, if the outlet pressure is detected to be less than or equal to the inlet pressure, the compressor is determined to be in the reverse rotation state.

[0071] In this way, the rotation state of the compressor can be quickly detected by comparing the pressure at the outlet and the pressure at the inlet of the compressor, so as to quickly detect whether the compressor is in reverse rotation when the compressor is successfully started.

[0072] In one embodiment, when the rotation state is reverse rotation, determining a corresponding reverse rotation control scheme according to the compressor type of the compressor includes:

[0073] When the rotation state is reverse, obtaining a compressor type of the compressor;

[0074] When the compressor type of the compressor is a first preset type, determining the software commutation scheme as the reverse rotation control scheme, wherein the compressor of the first preset type supports reverse rotation;

[0075] When the compressor type of the compressor is a second preset type, the shutdown scheme is determined to be the reverse rotation control scheme, wherein the compressor of the second preset type does not support reverse rotation.

[0076] Specifically, when it is determined that the compressor is reversed, personalized reversal processing is required for different types of compressors. Therefore, it is necessary to first obtain the compressor type of the compressor. The compressor types are divided into rotary compressors and scroll compressors. Rotary compressors will get stuck in the reverse direction and cannot continue to rotate when reversed. Scroll compressors can be reversed, but the outlet pressure of the scroll compressor is lower than the inlet pressure when reversed. The first preset type is used to indicate a scroll compressor, and the second preset type is used to indicate a rotary compressor.

[0077] Reference Figure 2 Under normal circumstances, the driver software in the compressor control device controls the rotation of the compressor by controlling three pairs of EPWM waves. From a hardware perspective, under normal circumstances, the driver board collects the output current of the three phases ABC and calculates the next control signal, and sends it to phase A (IC1, IC2), phase B (IC3, IC4), and phase C (IC5, IC6) for execution. If the compressor wires are connected in reverse, the definition of reverse connection is that there is no way to form the normal sequence of ABC, such as BCA, BAC, ACB. The circuit that has been connected in reverse only needs to swap two adjacent wires at random to reassemble the ABC sequence, such as CAB, ACB. For scroll compressors, it is very simple to implement this operation from the software. You only need to send the control signal sent to phase A to phase B for execution, and send the control signal sent to phase B to phase A for execution to achieve phase sequence correction. Therefore, for scroll compressors, the software commutation scheme is determined to be a reverse control scheme.

[0078] Since the rotary compressor cannot be reversed, the shutdown plan is determined to be a reverse control plan. The shutdown plan is used to control the compressor to remain in a shutdown state to prevent the compressor from continuing to reverse and aggravating the degree of the compressor reversal failure.

[0079] In one embodiment, controlling the compressor according to the reverse control scheme includes:

[0080] When the reversing control scheme is a software commutation scheme, the compressor is controlled to send a first-phase control signal to the second-phase drive circuit, and a second-phase control signal to the first-phase drive circuit, wherein the first-phase drive circuit is any one of the three-phase drive circuits of the compressor, and the second-phase drive circuit is a drive circuit adjacent to the first-phase drive circuit.

[0081] Specifically, when the reversal control scheme is a software commutation scheme, any one of the three-phase control signals of the compressor is randomly determined as the first-phase control signal, and the second-phase control signal is randomly determined from the remaining two-phase control signals, and the first-phase control signal and the second-phase control signal for commutation are recorded, and the first-phase control signal is sent to the second-phase drive circuit. That is, when the compressor wiring is reversed, the first-phase control signal is used to control the first-phase drive circuit, and the second-phase control signal is used to control the second-phase drive circuit. However, in order to solve the problem of reverse wiring, the first-phase control signal and the second-phase control signal are commutated to achieve software commutation.

[0082] For example, the control topology of the compressor under software commutation operation is as follows Figure 3 As shown, driver chips IC1 and IC2 control the switching of the upper and lower switches on phase B. Current sensors collect this current and recalibrate it within the program as the B-phase current for control calculations. Driver chips IC3 and IC4 control the switching of the upper and lower switches on phase A. Current sensors collect this current and recalibrate it within the program as the A-phase current for control calculations. To achieve phase commutation in software, simply send the control signal sent to phase A to phase B, and vice versa. This corrects the phase sequence and prevents the compressor from reversing.

[0083] Based on the above method, the losses caused by compressor reversal during R&D and production can be reduced. For scroll compressors, if reversal occurs, it can be directly driven by changing the software strategy without rewiring, reducing the time cost of problem handling.

[0084] Reference Figure 2 and Figure 3 It can be seen that each phase driving circuit includes two switching tubes and a driving chip.

[0085] In one embodiment, when the inversion control scheme is a software commutation scheme, after controlling the compressor to send the first phase control signal to the second phase drive circuit and the second phase control signal to the first phase drive circuit, the method further includes:

[0086] Restarting the compressor and obtaining a closed-loop startup state and an open-loop startup state of the compressor;

[0087] When the closed-loop startup state and / or the open-loop startup state of the compressor is successful, controlling the compressor to operate normally according to a preset operation mode;

[0088] When both the closed-loop startup state and the open-loop startup state of the compressor fail to start, the compressor is controlled to remain in a shutdown state.

[0089] Specifically, refer to Figure 4 After the software phase change is performed on the compressor, it is necessary to restart the compressor and re-acquire the startup status of the compressor to determine the startup status of the compressor after the phase change operation is performed and restarted. If the startup is successful, the comparison relationship between the outlet pressure and the inlet pressure is further determined according to the above process to determine whether the compressor is reversed after the phase change. If the outlet pressure is greater than the inlet pressure, it means that the compressor has returned to the forward rotation state after the software phase change, that is, the compressor maintains normal operation subsequently; if the outlet pressure of the compressor is less than or equal to the inlet pressure after the successful restart, it means that the compressor is still in reverse after the software phase change, then the software phase change operation of the scroll compressor is continued, but when performing the phase change operation, it is necessary to re-screen the two control signals that have not undergone phase change. For example, the control signals for the last phase change are the A-phase control signal and the B-phase control signal, then the control signals for this phase change can be the A-phase control signal and the C-phase control signal, or the B-phase control signal and the C-phase control signal, to perform phase change processing between different phases, thereby achieving the effect of phase change with a normal phase relationship.

[0090] However, if the compressor fails to restart after phase change, the compressor status is output as abnormal and the compressor is controlled to remain in the shutdown state to prevent the compressor from continuously starting in the abnormal state and aggravating the fault severity.

[0091] Figure 1 and Figure 4 FIG. 1 is a flow chart of a compressor control method in one embodiment. It should be understood that although Figure 1 and Figure 4 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. In addition, Figure 1and Figure 4 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0092] In one embodiment, Figure 5 As shown, a compressor control device is provided, comprising:

[0093] A reverse rotation detection module 310 is configured to determine the rotation state of the compressor based on the detection results of the outlet pressure and the inlet pressure of the compressor when the compressor is successfully started;

[0094] a scheme determining module 320 for determining a corresponding reverse rotation control scheme according to a compressor type of the compressor when the rotation state is reverse rotation;

[0095] The control module 330 is configured to control the compressor according to the reverse control scheme.

[0096] In one embodiment, the reversal detection module 310 is further configured to:

[0097] When a startup instruction for the compressor is obtained, the compressor is started;

[0098] When the startup time of the compressor reaches a preset time, obtaining a closed-loop startup state and an open-loop startup state of the compressor;

[0099] When the closed-loop startup state and / or the open-loop startup state of the compressor is successful, the rotation state of the compressor is determined according to the detection results of the outlet pressure and the inlet pressure of the compressor.

[0100] In one embodiment, the reversal detection module 310 is further configured to:

[0101] When the compressor fails to start in both the closed-loop startup state and the open-loop startup state, obtaining the outlet pressure of the compressor;

[0102] When the air outlet pressure of the compressor is greater than a first threshold, the compressor is controlled to stop for a specified period of time and then restart.

[0103] In one embodiment, the reversal detection module 310 is further configured to:

[0104] When it is detected that the pressure at the air outlet of the compressor is greater than or equal to the pressure at the air inlet of the compressor, determining that the rotation state of the compressor is forward rotation;

[0105] When it is detected that the pressure at the air outlet of the compressor is lower than the pressure at the air inlet of the compressor, it is determined that the rotation state of the compressor is reverse rotation.

[0106] In one embodiment, the solution determination module 320 is further configured to:

[0107] When the rotation state is reverse, obtaining a compressor type of the compressor;

[0108] When the compressor type of the compressor is a first preset type, determining the software commutation scheme as the reverse rotation control scheme, wherein the compressor of the first preset type supports reverse rotation;

[0109] When the compressor type of the compressor is a second preset type, the shutdown scheme is determined to be the reverse rotation control scheme, wherein the compressor of the second preset type does not support reverse rotation.

[0110] In one embodiment, the control module 330 is further configured to:

[0111] When the reversing control scheme is a software commutation scheme, the compressor is controlled to send a first-phase control signal to the second-phase drive circuit, and a second-phase control signal to the first-phase drive circuit, wherein the first-phase drive circuit is any one of the three-phase drive circuits of the compressor, and the second-phase drive circuit is a drive circuit adjacent to the first-phase drive circuit.

[0112] In one embodiment, the control module 330 is further configured to:

[0113] Restarting the compressor and obtaining a closed-loop startup state and an open-loop startup state of the compressor;

[0114] When the closed-loop startup state and / or the open-loop startup state of the compressor is successful, controlling the compressor to operate normally according to a preset operation mode;

[0115] When both the closed-loop startup state and the open-loop startup state of the compressor fail to start, the compressor is controlled to remain in a shutdown state.

[0116] like Figure 6 As shown, an embodiment of the present application provides a home appliance, including a processor 711, a communication interface 712, a memory 713 and a communication bus 714, wherein the processor 711, the communication interface 712, and the memory 713 communicate with each other through the communication bus 714;

[0117] Memory 713, for storing computer programs;

[0118] The processor 711 is configured to implement the compressor control method provided by any one of the aforementioned method embodiments when executing the program stored in the memory 713 .

[0119] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the household appliance to which the solution of the present application is applied. The specific household appliance may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0120] In one embodiment, the compressor control device provided by the present application can be implemented in the form of a computer program. The computer program can be used in Figure 6 The memory of the household appliance can store various program modules constituting the compressor control device, such as, Figure 5 The reverse rotation detection module 310, the scheme determination module 320 and the control module 330 are shown. The computer program composed of various program modules enables the processor to execute the compressor control method of each embodiment of the present application described in this specification.

[0121] Figure 6 The household appliances shown can be Figure 5 The reverse rotation detection module 310 in the illustrated compressor control device determines the rotation state of the compressor based on the detection results of the compressor's outlet pressure and inlet pressure when the compressor is successfully started. The household appliance, through the solution determination module 320, determines a corresponding reverse rotation control solution based on the compressor type when the rotation state is reverse rotation. The household appliance, through the control module 330, controls the compressor according to the reverse rotation control solution.

[0122] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the compressor control method provided by any one of the aforementioned method embodiments is implemented.

[0123] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0124] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, or of course, by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a household appliance (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiment.

[0125] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative methods may be used.

[0126] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A compressor control method, characterized in that: The method comprises: When the compressor is successfully started, determining the rotation state of the compressor according to the detection results of the air outlet pressure and the air inlet pressure of the compressor; When the rotation state is reverse, determining a corresponding reverse control scheme according to the compressor type of the compressor; controlling the compressor according to the reverse control scheme; When the rotation state is reverse rotation, determining a corresponding reverse rotation control scheme according to the compressor type of the compressor includes: When the rotation state is reverse, obtaining a compressor type of the compressor; When the compressor type of the compressor is a first preset type, determining the software commutation scheme as the reverse rotation control scheme, wherein the compressor of the first preset type supports reverse rotation; or When the compressor type of the compressor is a second preset type, the shutdown scheme is determined to be the reverse rotation control scheme, wherein the compressor of the second preset type does not support reverse rotation.

2. The method according to claim 1, characterized in that When the compressor is successfully started, determining the rotation state of the compressor according to the detection results of the air outlet pressure and the air inlet pressure of the compressor includes: When a startup instruction for the compressor is obtained, the compressor is started; When the startup time of the compressor reaches a preset time, obtaining a closed-loop startup state and an open-loop startup state of the compressor; When the closed-loop startup state and / or the open-loop startup state of the compressor is successful, the rotation state of the compressor is determined according to the detection results of the outlet pressure and the inlet pressure of the compressor.

3. The method according to claim 2, characterized in that When the startup duration of the compressor reaches a preset duration, after obtaining the closed-loop startup state and the open-loop startup state of the compressor, the method further includes: When the compressor fails to start in both the closed-loop startup state and the open-loop startup state, obtaining the outlet pressure of the compressor; When the air outlet pressure of the compressor is greater than a first threshold, the compressor is controlled to stop for a specified period of time and then restart.

4. The method according to claim 1, wherein Controlling the compressor according to the reverse control scheme includes: When the reversing control scheme is a software commutation scheme, the compressor is controlled to send a first-phase control signal to the second-phase drive circuit, and a second-phase control signal to the first-phase drive circuit, wherein the first-phase drive circuit is any one of the three-phase drive circuits of the compressor, and the second-phase drive circuit is a drive circuit adjacent to the first-phase drive circuit.

5. The method according to claim 4, characterized in that When the inversion control scheme is a software commutation scheme, after controlling the compressor to send the first phase control signal to the second phase drive circuit and the second phase control signal to the first phase drive circuit, the method further includes: Restarting the compressor and obtaining a closed-loop startup state and an open-loop startup state of the compressor; When the closed-loop startup state and / or the open-loop startup state of the compressor is successful, controlling the compressor to operate normally according to a preset operation mode; When both the closed-loop startup state and the open-loop startup state of the compressor fail to start, the compressor is controlled to remain in a shutdown state.

6. A compressor control device, characterized in that: The device comprises: a reverse rotation detection module, configured to determine the rotation state of the compressor based on the detection results of the air outlet pressure and the air inlet pressure of the compressor when the compressor is successfully started; a scheme determination module, configured to determine a corresponding reverse rotation control scheme according to a compressor type of the compressor when the rotation state is reverse rotation; a control module, configured to control the compressor according to the reverse control scheme; The solution determination module is also used to: When the rotation state is reverse, obtaining a compressor type of the compressor; When the compressor type of the compressor is a first preset type, determining the software commutation scheme as the reverse rotation control scheme, wherein the compressor of the first preset type supports reverse rotation; or When the compressor type of the compressor is a second preset type, the shutdown scheme is determined to be the reverse rotation control scheme, wherein the compressor of the second preset type does not support reverse rotation.

7. A household appliance, characterized in that: The household appliance includes a compressor and the compressor control device according to claim 6, wherein the compressor control device is used to detect the rotation state of the compressor and control the compressor to stop reverse operation when the rotation state is reverse.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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