Compressor control method and device, mainboard, electric appliance, medium and program product

Abstract

The invention discloses a compressor control method and device, a mainboard, an electric appliance, a medium and a program product, and relates to the technical field of compressors. The method comprises the following steps: detecting the on-off state of a power supply in response to a shutdown instruction; and then determining a target shutdown strategy associated with the on-off state of the power supply, and executing the target shutdown strategy to stop the compressor. And finally, storing the rotor position information when the compressor is shut down at present, and taking the rotor position information as initial rotor position information when the compressor is started next time. Therefore, according to different on-off states of the power supply, the corresponding shutdown strategies are executed respectively, so that the compressor can be quickly shut down, and the position information of the rotor of the compressor before stopping is kept consistent with the position information of the rotor before next starting. And next compressor starting is carried out according to the position information before the last rotor stops, so that the starting stability of the compressor is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a control method and device of a compressor, a mainboard, an electrical appliance, a medium and a program product. BACKGROUND

[0002] In some household appliances that need to be heat-exchanged, such as air conditioners, refrigerators and other electrical appliances, a heat-exchange system is usually configured.

[0003] However, the internal environment of the compressor in the heat-exchange system is usually high temperature and high pressure, and the internal space is small. Therefore, the motor of the compressor cannot use a position sensor to identify the rotor position, thereby causing a high failure probability of the compressor in the starting stage and reducing the running stability of the compressor. SUMMARY

[0004] In view of the technical problem that the motor of the compressor cannot use a position sensor to identify the rotor position and improve the failure probability of starting, the present application is proposed in order to provide a control method and device of a compressor, a mainboard, an electrical appliance, a medium and a program product that overcome the above problems or at least partially solve the above problems.

[0005] Based on the first aspect of the present application, a control method of a compressor is provided, which comprises:

[0006] In response to a shutdown instruction, detecting a power on-off state;

[0007] Determining a target shutdown strategy associated with the power on-off state, and executing the target shutdown strategy to make the compressor stop running;

[0008] Storing rotor position information of the compressor at the current stop running time, and taking the rotor position information as initial rotor position information at the next starting time of the compressor.

[0009] An optional summary, in the case that the power on-off state is a power-off state, the execution of the target shutdown strategy comprises:

[0010] Driving a discharge module located in a busbar of the compressor to act, so that the electric energy in a busbar capacitor of the compressor is discharged through the discharge module.

[0011] An optional summary, the discharge module comprises a control switch tube and a discharge resistor connected in series with the control switch tube, and the busbar capacitor is connected in parallel with the discharge module.

[0012] The driving of the discharge module located in the busbar of the compressor comprises:

[0013] The control switch is driven to be turned on, so that the control switch, a discharge resistor and a bus capacitor form a discharge loop to discharge.

[0014] An optional summary of the application, the control method further comprises:

[0015] Before driving the discharge module to discharge, rotor position information of the compressor is detected and taken as rotor position information at shutdown.

[0016] An optional summary of the application, when the power supply on-off state is a power supply on state, the target shutdown strategy is executed, comprising:

[0017] The operating frequency of the compressor is reduced, and the compressor is controlled to enter an electric energy feedback state.

[0018] If the operating frequency is detected to be lower than a set shutdown frequency, the electronic expansion valve is closed to block the input of refrigerant at the suction end of the compressor.

[0019] An optional summary of the application, before the electronic expansion valve is closed, rotor position information of the compressor is detected and taken as rotor position information at shutdown.

[0020] An optional summary of the application, the control method further comprises:

[0021] In response to a compressor start instruction, initial rotor position information is acquired;

[0022] The compressor is started according to the initial rotor position information.

[0023] Based on the second aspect of the application, a control device of a compressor is further provided, and the control device comprises:

[0024] A state detection module is configured to detect a power supply on-off state in response to a shutdown instruction;

[0025] A strategy execution module is configured to determine a target shutdown strategy associated with the power supply on-off state, and execute the target shutdown strategy to make the compressor shutdown;

[0026] A position storage module is configured to store rotor position information at current shutdown of the compressor, and take the rotor position information as initial rotor position information at next start of the compressor.

[0027] Based on the third aspect of the application, a control mainboard is further provided, and the control mainboard comprises:

[0028] One or more processors;

[0029] A memory;

[0030] One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the method of any of the above SUMMARY.

[0031] Based on the fourth aspect of the present application, there is also provided a household appliance, comprising a compressor and a control mainboard as described in the above SUMMARY, the control mainboard being electrically connected with the compressor to control the operation of the compressor.

[0032] Based on the fifth aspect of the present application, there is also provided a computer readable storage medium storing a computer program used in combination with a control mainboard, the computer program being executable by a processor to complete the method of any of the above SUMMARY.

[0033] Based on the sixth aspect of the present application, there is also provided a computer program product comprising computer program / computer executable instructions, which, when executed by a processor in a control mainboard, implement the method of any of the above SUMMARY.

[0034] Compared with the prior art, the present application can comprise first detecting the power on / off state in response to a shutdown instruction. Then determining a target shutdown strategy associated with the power on / off state, and executing the target shutdown strategy to make the compressor stop. Finally, storing the rotor position information of the compressor at the current stop, and taking the rotor position information as the initial rotor position information when the compressor starts next time. Thus, according to the different power on / off states, the corresponding shutdown strategies are executed respectively to make the compressor stop quickly, and the position information of the rotor before stopping is consistent with the position information before starting next time. The compressor is started next time according to the position information before the last rotor stops, thereby improving the starting stability of the compressor.

[0035] The above description is only a summary of the technical solutions of the present application. In order to enable one of ordinary skill in the art to better understand the technical means of the present application and implement it according to the content of the description, and in order to enable the above and other purposes, features and advantages of the present application to be more apparent and understandable, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Furthermore, the same reference numerals in the attached drawings are intended to refer to the same components throughout the several drawings.

[0037] In the drawings:

[0038] Figure 1 1 is a flow chart of steps of a compressor control method provided by an embodiment of the present invention;

[0039] Figure 2 1 is a schematic flow chart of steps of another compressor control method provided by an embodiment of the present invention;

[0040] Figure 3 This is a structural diagram of a main control circuit provided by an embodiment of the present invention;

[0041] Figure 4 This is a schematic flow chart of steps of another compressor control method provided by an embodiment of the present invention;

[0042] Figure 5 This is a partial structural diagram of a household appliance provided by an embodiment of the present invention;

[0043] Figure 6 This is a structural block diagram of a compressor control device provided by an embodiment of the present invention.

[0044] Figure numerals: 1. First converter module; 2. Charging module; 21. First switch; 22. Second switch; 23. Charging resistor; 3. Bus capacitor; 4. Discharge module; 41. Control switch tube; 42. Discharge resistor; 5. Second converter module; 6. Current detection device; 7. Compressor; 8. First heat exchanger; 9. Electronic expansion valve; 10. Second heat exchanger. DETAILED DESCRIPTION

[0045] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0046] Some household appliances that require heat exchange processing, such as air conditioners, refrigerators and other appliances, are usually equipped with a heat exchange system.

[0047] However, because the internal environment of the compressor in the heat exchange system is usually high temperature and high pressure, and its internal space is relatively small, the compressor motor cannot use the position sensor to identify the rotor position, resulting in a high probability of startup failure during the compressor startup phase and reduced compressor operating stability.

[0048] In view of the above technical problems, the embodiment of the present application can include first detecting the power on-off state in response to the shutdown instruction. Then determining the target shutdown strategy associated with the power on-off state, and executing the target shutdown strategy to stop the compressor 7. Finally, storing the rotor position information of the compressor 7 at the current shutdown time, and taking the rotor position information as the initial rotor position information when the compressor 7 starts next time. Thus, according to the different power on-off states, the corresponding shutdown strategy is executed to make the compressor 7 stop quickly, so that the position information of the rotor of the compressor 7 before stopping is consistent with the position information before starting next time. The compressor 7 starts next time according to the position information before the last rotor stops, thereby improving the starting stability of the compressor 7.

[0049] Reference Figure 1 The embodiment of the present application provides a control method of a compressor, which is applied to a control mainboard, and the method can include:

[0050] S101, detecting the power on-off state in response to the shutdown instruction.

[0051] In the embodiment of the present application, the shutdown instruction refers to an instruction for instructing the compressor 7 to stop. The shutdown instruction can be generated by the following steps: when it is detected that the temperature in the environment reaches a set temperature value or exceeds a safety temperature threshold, the shutdown instruction of the compressor 7 is generated.

[0052] In another embodiment, when it is detected that the pressure value in the heat exchange system is abnormal, the shutdown instruction of the compressor 7 is generated. In another embodiment, when it is detected that the running time of the heat exchange system reaches a preset running time, the shutdown instruction of the compressor 7 is generated. In another embodiment, when it is detected that the running mode of the heat exchange system is switched, or a shutdown request of a user terminal / remote controller / panel button is received, the shutdown instruction of the compressor 7 is generated. In another embodiment, when it is detected that there is a device failure in the heat exchange system, the shutdown instruction of the compressor 7 is generated.

[0053] Thus, when it is detected that the shutdown instruction is generated, whether the power supply for the compressor 7 to work is suddenly disconnected can be determined by detecting the current on the power grid side. For example, the current detection device 6 can be used to detect whether the power on the power grid side is disconnected, so that the power on-off state can be determined. The power on-off state can include the following two states: power-off state and power-on state.

[0054] In the operation of the compressor 7, the rotor position information in the motor of the compressor 7 can be detected at intervals, and the compressor 7 can stop operating between two detections of the rotor position information of the compressor 7, so that there is a deviation between the rotor position information last detected by the compressor 7 and the actual rotor position information.

[0055] S102, determine the target shutdown strategy associated with the power on-off state, and execute the target shutdown strategy to make the compressor stop.

[0056] S103, store the rotor position information of the compressor at the current stop, and take the rotor position information as the initial rotor position information when the compressor starts next time.

[0057] In the embodiment of the application, in order to improve the information accuracy of the rotor position information of the compressor 7 at the stop, the rotor position information last detected by the compressor 7 can be made consistent with the actual rotor position information at the stop, for example, the compressor 7 can be made to stop quickly after the rotor position information is detected in the case that the power is in the off state. In another example, the compressor 7 can be made to stop quickly after the rotor position information is detected in the case that the power is in the on state, on the premise of ensuring the service life.

[0058] Therefore, corresponding shutdown strategies can be respectively preset according to the on-off state of the power, so that the compressor 7 can stop quickly after the rotor position information is detected. Thus, the detected rotor position information is consistent with the actual rotor position information at the stop, or the position error between the detected rotor position information and the actual rotor position information at the stop is very small. Therefore, the rotor position information detected at the stop can be stored and taken as the initial rotor position information when the compressor 7 starts next time. Thus, the initial rotor position information is consistent with or very close to the actual rotor position information of the rotor in the compressor 7, so that the accurate matching between the electromagnetic torque and the rotor position can be established. Therefore, the starting stability of the compressor 7 is improved, the rotor position of the compressor 7 is accurately controllable, the starting process is smooth, and the compressor 7 will not stop due to abnormal protection in the starting stage.

[0059] Referring to Figure 2 , another control method of a compressor is provided in the embodiment of the application, and the method can include:

[0060] S201, in response to a shutdown instruction, detecting the power on-off state.

[0061] In the embodiment of the present invention, the shutdown instruction refers to an instruction for instructing the compressor 7 to shut down. The shutdown instruction can be generated by the following steps: when it is detected that the ambient temperature reaches a set temperature value or exceeds a safety temperature threshold, the shutdown instruction of the compressor 7 is generated.

[0062] In another embodiment, a shutdown command for the compressor 7 is generated upon detecting an abnormal pressure value in the heat exchange system. In yet another embodiment, a shutdown command for the compressor 7 is generated upon detecting that the operating time of the heat exchange system has reached a preset operating time. In yet another embodiment, a shutdown command for the compressor 7 is generated upon detecting a switch in the operating mode of the heat exchange system or receiving a shutdown request from a user terminal / remote control / panel button. In yet another embodiment, a shutdown command for the compressor 7 is generated upon detecting a component failure in the heat exchange system.

[0063] Thus, when the shutdown command is detected, it is possible to determine whether the power supply for the compressor 7 is suddenly disconnected by detecting the current on the grid side. Figure 3 As shown, a current detection device 6 can be used to detect whether the grid side is powered off, thereby determining the power on / off state. The current detection device 6 may include, but is not limited to, a current sensor and other devices. The power on / off state may include the following two states: a power off state and a power on state.

[0064] During the operation of the compressor 7, the rotor position information of the compressor 7 can be detected at intervals. Between two detections of the rotor position information of the compressor 7, the compressor 7 may stop running, which may cause a deviation between the rotor position information last detected by the compressor 7 and the actual position information of the rotor.

[0065] In some embodiments, a high-frequency injection method can be used to detect rotor position information. For example, a high-frequency voltage signal is injected into the stator winding of the motor of the compressor 7. The nonlinear characteristics of the permanent magnet flux are utilized to obtain a high-frequency current response, and the rotor position information is determined from the high-frequency current response.

[0066] S202: Determine whether the power on / off state is a power off state.

[0067] In the embodiment of the present invention, if it is determined that the power on / off state is the power off state, the following S203 is executed. If it is determined that the power on / off state is the power on state, the following S204 is executed.

[0068] S203, execute the power-off shutdown strategy associated with the power-off state of the power supply, and executing the power-off shutdown strategy at least includes driving a discharge module in the busbar of the compressor to act to cause the electrical energy in the busbar capacitor of the compressor to be discharged through the discharge module.

[0069] In the embodiment of the present application, referring to Figure 3 As shown in the figure, the main control circuit of the compressor 7 can include a first current conversion module 1, a charging module 2, a busbar capacitor 3, a discharge module 4, and a second current conversion module 5. The charging module 2 is coupled between the first current conversion module 1 and the second current conversion module 5, and the wires connected to both ends of the first current conversion module 1 and both ends of the second current conversion module 5 are the DC bus (or simply referred to as the bus) of the compressor 7. The busbar capacitor 3 is coupled to the side of the charging module 2 away from the first current conversion module 1, and the busbar capacitor 3 is connected in parallel across the DC bus. The discharge module 4 is connected in parallel with the busbar capacitor 3, and the second current conversion module 5 is coupled to the motor of the compressor 7. The AC power from the power grid is converted into DC power by the first current conversion module 1, and the second current conversion module 5 converts the DC power converted by the first current conversion module 1 to obtain AC power to drive the motor of the compressor 7 to operate.

[0070] The charging module 2 can include a first switch 21, a second switch 22, and a charging resistor 23, wherein the first switch 21 is connected in series in the DC bus, and the second switch 22 and the charging resistor 23 are connected in series and form a parallel connection with the first switch 21. When the compressor 7 is powered on, the second switch 22 is in a closed state, the first switch 21 is in an open state, and the busbar capacitor 3 is charged through the charging resistor 23. When the voltage value of the busbar capacitor 3 reaches a preset voltage threshold, the first switch 21 is switched to a closed state, and the second switch 22 is switched to an open state, and during subsequent operation of the compressor 7, the first switch 21 remains closed and the second switch 22 remains open.

[0071] When the power supply on-off state is in the power supply off state, the discharge module 4 in the bus of the compressor 7 can be driven to act. In an embodiment, the control switch tube 41 can be driven to be turned on, so that the control switch tube 41, the discharge resistor 42 and the bus capacitor 3 form a discharge circuit to discharge. For example, the control mainboard can input a high level to the control end of the control switch tube 41, so that the control switch tube 41 is converted to the on state. For example, the control switch tube 41 can be an IGBT (Insulated Gate Bipolar Transistor). Thus, the power of the compressor 7 can be stored by the bus capacitor 3 and released by the discharge resistor 42, so that the compressor 7 can be quickly stopped, so that the rotor position information detected before stopping is consistent with the actual position information of the rotor at the time of stopping, or the position error between the detected rotor position information and the actual position information of the rotor at the time of stopping is small.

[0072] S204, the power-on shutdown strategy associated with the power-on state is executed to stop the compressor, wherein executing the power-on shutdown strategy at least includes: reducing the operating frequency of the compressor and controlling the compressor to enter an electric energy feedback state; if it is detected that the operating frequency is lower than the set shutdown frequency, the electronic expansion valve is closed to block the input of refrigerant at the suction end of the compressor.

[0073] In the embodiment of the application, when there is an external current input, the compressor 7 can be stably stopped by reducing the operating frequency of the compressor 7 (i.e. reducing the motor speed of the compressor 7). For example, the voltage of the bus capacitor 3 can be prevented from rising sharply to cause breakdown. While reducing the operating frequency of the compressor 7, the compressor 7 can be controlled to enter an electric energy feedback state. The electric energy feedback state refers to that the motor of the compressor 7 generates electricity due to rotational inertia, so that the second conversion module 5 is used as a rectifier to convert alternating current into direct current input into the direct current bus, and then the first conversion module 1 converts the direct current in the direct current bus into alternating current to feedback to the power grid. Thus, the mechanical energy of the compressor 7 can be converted into electric energy feedback to the power grid side to generate a reverse electromagnetic torque to quickly brake, so that the stopping speed of the compressor 7 can be improved.

[0074] When the operating frequency of the compressor 7 is lower than (less than or equal to) the set shutdown frequency, it is determined that the motor speed of the compressor 7 is slow and the mechanical kinetic energy accumulated by the compressor 7 is small. Therefore, the compressor 7 can be made to reach a vacuum state by closing the electronic expansion valve 9, and the compressor 7 is prompted to stop immediately. Among them, the closing of the electronic expansion valve 9 can block the refrigerant input to the suction end of the compressor 7. This can greatly reduce the suction pressure of the compressor 7 and cause the electromagnetic torque demand of the compressor 7 to drop significantly. The compressor 7 cannot maintain the speed at a low operating frequency, causing the compressor 7 to stop immediately.

[0075] After the rotor position information is detected, the compressor 7 can be quickly shut down by the power-on / off strategy. This ensures that the detected rotor position information is consistent with the actual rotor position information at the time of shutdown, or that the position error between the detected rotor position information and the actual rotor position information at the time of shutdown is very small.

[0076] S205: Store the rotor position information of the compressor when it is currently stopped, and use the rotor position information as the initial rotor position information when the compressor is started next time.

[0077] In an embodiment of the present invention, the rotor position information detected during shutdown can be stored and used as the initial rotor position information when the compressor 7 is next started. Since the compressor 7 is quickly shut down after the rotor position information is detected, the initial rotor position information is consistent with or very close to the actual position information of the rotor in the compressor 7, and a precise match between the electromagnetic torque and the rotor position can be established. This improves the startup stability of the compressor 7, ensures accurate and controllable rotor position of the compressor 7, and ensures a smooth startup process, preventing the compressor 7 from shutting down due to abnormal protection during the startup phase.

[0078] Reference Figure 3 , shows another compressor control method provided by an embodiment of the present invention, the method may include:

[0079] S301 , in response to a shutdown instruction, detecting a power on / off state.

[0080] In the embodiment of the present invention, the description of S301 refers to the description of S201 above.

[0081] S302: Determine whether the power on / off state is a power off state.

[0082] In the embodiment of the present invention, if it is determined that the power on / off state is the power off state, the following S303 is executed. If it is determined that the power on / off state is the power on state, the following 3205 is executed.

[0083] S303, detecting rotor position information of the compressor as rotor position information at the time of shutdown.

[0084] S304, executing a power-off shutdown strategy associated with the power-off state of the power supply, and executing the power-off shutdown strategy at least includes driving a discharge module located in a busbar of the compressor to act, so that the electrical energy in the busbar capacitor of the compressor is discharged through the discharge module.

[0085] In the embodiment of the present application, when the power supply on-off state is in the power-off state of the power supply, the discharge module 4 located in the busbar of the compressor 7 can be driven to act. In one embodiment, the control switch tube 41 can be driven to be turned on, so that the control switch tube 41, the discharge resistor 42 and the busbar capacitor 3 form a discharge circuit to discharge. For example, the control mainboard can input a high level to the control end of the control switch tube 41, so that the control switch tube 41 is converted to the on state. For example, the control switch tube 41 can be an IGBT (Insulated Gate Bipolar Transistor). Thus, the electrical energy of the compressor 7 can be stored in the busbar capacitor 3 and discharged through the discharge resistor 42, so that the compressor 7 can be quickly shut down. Therefore, before executing the power-off shutdown strategy, the rotor position information of the compressor 7 can be detected, and the rotor position information is taken as the rotor position information at the time of shutdown of the compressor 7. The power-off shutdown strategy is executed synchronously, so that the compressor 7 can be immediately shut down. Therefore, the rotor position information detected before shutdown can be consistent with the actual rotor position information at the time of shutdown, or the position error between the detected rotor position information and the actual rotor position information at the time of shutdown is very small.

[0086] S305, executing a power-on shutdown strategy associated with the power-on state of the power supply to shut down the compressor 7, wherein executing the power-on shutdown strategy at least includes reducing the operating frequency of the compressor 7 and controlling the compressor 7 to enter an electrical energy feedback state; if it is detected that the operating frequency is lower than a set shutdown frequency, detecting rotor position information of the compressor 7 as rotor position information at the time of shutdown, and closing the electronic expansion valve 9 to block the input of refrigerant at the suction end of the compressor 7.

[0087] In the embodiment of the present application, when external current is input, smooth shutdown can be realized by reducing the operating frequency of the compressor 7 (i.e. reducing the motor speed of the compressor 7). For example, breakdown caused by sharp rise of the bus capacitor 3 voltage can be avoided. While reducing the operating frequency of the compressor 7, the compressor 7 can be controlled to enter the electric energy feedback state. The electric energy feedback state refers to that the motor of the compressor 7 generates electricity due to rotational inertia, thereby taking the second conversion module 5 as a rectifier to convert alternating current into direct current input into the direct current bus, and then converting the direct current in the direct current bus into alternating current by the first conversion module 1 and feeding back to the power grid. Thus, the mechanical energy of the compressor 7 can be converted into electric energy and fed back to the power grid side, so as to generate reverse electromagnetic torque to brake quickly, and the shutdown speed of the compressor 7 can be improved.

[0088] When the operating frequency of the compressor 7 is lower (less than or equal to) than the set shutdown frequency, it is determined that the motor speed of the compressor 7 is slow, and the mechanical kinetic energy accumulated by the compressor 7 is less. The set shutdown frequency can be determined by those skilled in the art according to the motor performance of the compressor 7, which is not limited herein. The compressor 7 can be immediately stopped by closing the electronic expansion valve 9. The closing of the electronic expansion valve 9 can block the input of refrigerant at the suction end of the compressor 7. Thus, the suction pressure of the compressor 7 can be greatly reduced, and the electromagnetic torque demand of the compressor 7 is greatly reduced, so that the compressor 7 cannot maintain the speed at a low operating frequency, thereby making the compressor 7 immediately stop.

[0089] Thus, the rotor position information of the compressor 7 can be detected before the electronic expansion valve 9 is closed, and the rotor position information is taken as the rotor position information when the compressor 7 is stopped. The electronic expansion valve 9 is closed synchronously to make the compressor 7 immediately stop. Thus, the detected rotor position information is consistent with the actual rotor position information when the compressor 7 is stopped, or the position error between the detected rotor position information and the actual rotor position information when the compressor 7 is stopped is small.

[0090] S306, store the rotor position information of the compressor when the compressor is currently stopped, and take the rotor position information as the initial rotor position information when the compressor is started next time.

[0091] The rotor position information detected at the shutdown time can be stored and used as initial rotor position information at the next time when the compressor 7 is started. Since the compressor 7 is quickly stopped after the rotor position information is detected. The initial rotor position information is consistent with or very close to the actual position information of the rotor in the compressor 7, so that the accurate matching between the electromagnetic torque and the rotor position can be established. Therefore, the starting stability of the compressor 7 is improved, the rotor position of the compressor 7 is accurately controllable, the starting process is smooth, and the compressor 7 will not be stopped due to abnormal protection during the starting stage.

[0092] S307, in response to the compressor starting instruction, obtaining initial rotor position information.

[0093] S308, starting the compressor according to the initial rotor position information.

[0094] In the embodiment of the application, the compressor starting instruction refers to an instruction for starting the compressor 7. When the control mainboard detects the compressor starting instruction, the initial rotor position information of the compressor 7 can be inquired and the compressor 7 can be started according to the initial rotor position information, so that the starting stability of the compressor 7 can be improved.

[0095] In summary, the embodiment of the application discloses a control method of a compressor, which can include first detecting the power on-off state in response to a shutdown instruction. Then determining the target shutdown strategy associated with the power on-off state, and executing the target shutdown strategy to stop the compressor 7. Finally, storing the rotor position information of the compressor 7 at the current shutdown time, and using the rotor position information as the initial rotor position information at the next time when the compressor 7 is started. Therefore, according to the different power on-off states, the corresponding shutdown strategies are executed to make the compressor 7 quickly stop, so that the position information of the rotor before stopping of the compressor 7 is consistent with the position information before the next start. The compressor 7 is started according to the last position information before stopping of the rotor, so that the starting stability of the compressor 7 is improved.

[0096] It should be noted that, for the method embodiment, in order to simply describe, it is expressed as a series of action combinations, but those skilled in the art should know that the application embodiment is not limited by the described action sequence, because according to the application embodiment, certain steps can be performed in other order or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions involved are not necessarily necessary for the application embodiment.

[0097] The embodiment of the present application also discloses a control mainboard, which can comprise one or more processors, a memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs being configured to perform the control method of the compressor.

[0098] Referring to Figure 3 The main control circuit of the compressor 7 is integrated on the control mainboard, wherein the main control circuit can comprise a first current conversion module 1, a charging module 2, a bus capacitor 3, a discharging module 4, and a second current conversion module 5. The charging module 2 is coupled between the first current conversion module 1 and the second current conversion module 5, and the wires located at both ends of the first current conversion module 1 and both ends of the second current conversion module 5 are the DC bus (or directly referred to as the bus) of the compressor 7. The bus capacitor 3 is coupled to the side of the charging module 2 away from the first current conversion module 1, and the bus capacitor 3 is connected in parallel at both ends of the DC bus. The discharging module 4 is arranged in parallel with the bus capacitor 3, and the second current conversion module 5 is coupled with the motor of the compressor 7. The AC power on the grid side is converted into DC power by the first current conversion module 1, and the second current conversion module 5 converts the DC power converted by the first current conversion module 1 to obtain AC power to drive the motor of the compressor 7 to operate.

[0099] The charging module 2 can comprise a first switch 21, a second switch 22, and a charging resistor 23, wherein the first switch 21 is connected in series in the DC bus, and the second switch 22 and the charging resistor 23 are connected in series and form a parallel connection with the first switch 21. When the compressor 7 is powered on, the second switch 22 is in a closed state, the first switch 21 is in an open state, and the bus capacitor 3 is charged through the charging resistor 23. When the voltage value of the bus capacitor 3 reaches a preset voltage threshold, the first switch 21 is switched to a closed state, and the second switch 22 is switched to an open state. During the subsequent operation of the compressor 7, the first switch 21 remains closed and the second switch 22 remains open.

[0100] The embodiment of the present application also discloses a household appliance, which can comprise a compressor 7 and a control mainboard as described in the above embodiment of the present application, wherein the control mainboard is electrically connected with the compressor 7 to control the operation of the compressor 7.

[0101] The household appliance can comprise an electric device with a compressor 7, for example, the household appliance can comprise but is not limited to an air conditioner, a refrigerator, and other electric devices. Referring to Figure 5As shown, the household appliance can further include an electronic expansion valve, a first heat exchanger 8, and a second heat exchanger 10. The compressor 7, the first heat exchanger 8, the electronic expansion valve 9, and the second heat exchanger 10 form a heat exchange cycle in sequence, so as to realize the heat exchange function of the household appliance.

[0102] In an example, when the household appliance is an air conditioner, and the air conditioner operates in a cooling mode, the compressor 7 compresses the refrigerant, converts the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, and outputs the high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant enters the first heat exchanger 8 (outdoor condenser) and is condensed, and the high-temperature and high-pressure gaseous refrigerant is converted into high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure liquid refrigerant is throttled by the electronic expansion valve 9 to form low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant flows to the second heat exchanger 10 (indoor evaporator) to evaporate, absorbs heat in the indoor environment, and is converted into low-temperature and low-pressure gaseous refrigerant to return to the compressor 7.

[0103] In another embodiment, when the household appliance operates in a heating mode, the compressor 7 compresses the refrigerant, converts the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, and outputs the high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant passes through the second heat exchanger 10 (indoor condenser) to be condensed, releases heat to the indoor environment, and converts the high-temperature and high-pressure gaseous refrigerant into high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure liquid refrigerant is throttled by the electronic expansion valve 9 to form low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant flows to the first heat exchanger 8 (outdoor evaporator) to evaporate, and is converted into low-temperature and low-pressure gaseous refrigerant to return to the compressor 7.

[0104] Referring to Figure 6 , a control device of a compressor is provided, which can include:

[0105] The state detection module 601 is configured to detect the power on-off state in response to the shutdown instruction.

[0106] The strategy execution module 602 is configured to determine a target shutdown strategy associated with the power on-off state, and execute the target shutdown strategy to stop the compressor 7.

[0107] The position storage module 603 is configured to store the rotor position information of the compressor 7 at the current shutdown time, and use the rotor position information as the initial rotor position information when the compressor 7 is started next time.

[0108] An optional embodiment of the application, the strategy execution module 602 is further configured to drive the discharge module 4 in the bus of the compressor 7 to act, so that the electrical energy in the bus capacitor 3 of the compressor 7 is discharged through the discharge module 4.

[0109] An optional embodiment of the application, the discharge module 4 includes a control switch tube 41 and a discharge resistor 42 connected in series with the control switch tube 41, and the bus capacitor 3 is connected in parallel with the discharge module 4. The strategy execution module 602 is further configured to drive the control switch tube 41 to conduct, so that the control switch tube 41, the discharge resistor 42 and the bus capacitor 3 form a discharge circuit to discharge.

[0110] An optional embodiment of the application, the control device can further include a position detection module, which is configured to detect rotor position information of the compressor 7 before driving the discharge module 4 to discharge, and the rotor position information is used as rotor position information at shutdown.

[0111] An optional embodiment of the application, the strategy execution module 602 can include:

[0112] A frequency control sub-module, configured to reduce the operating frequency of the compressor 7 and control the compressor 7 to enter an electrical energy feedback state.

[0113] A valve control sub-module, configured to close the electronic expansion valve 9 to block the input of refrigerant at the suction end of the compressor 7 if it is detected that the operating frequency is lower than a set shutdown frequency.

[0114] An optional embodiment of the application, the control device can further include a position detection module, which is configured to detect rotor position information of the compressor 7 before closing the electronic expansion valve 9, and the rotor position information is used as rotor position information at shutdown.

[0115] An optional embodiment of the application, the control device can further include:

[0116] An information acquisition module, configured to acquire initial rotor position information in response to a compressor start instruction.

[0117] A compressor 7 control module, configured to start the compressor 7 according to the initial rotor position information.

[0118] In summary, the embodiment of the present application discloses a control device of a compressor, which can include first responding to a shutdown instruction, detecting a power on-off state. Then determine the target shutdown strategy associated with the power on-off state, and execute the target shutdown strategy to make the compressor 7 stop. Finally, store the rotor position information at the current shutdown of the compressor 7, and take the rotor position information as the initial rotor position information when the compressor 7 starts next time. Therefore, according to the different power on-off states, the corresponding shutdown strategy is executed to make the compressor 7 stop quickly, so that the position information of the rotor of the compressor 7 before stopping is consistent with the position information before starting next time. According to the position information before the last rotor stops, the compressor 7 starts next time, thereby improving the starting stability of the compressor 7.

[0119] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between each embodiment can be referred to each other.

[0120] As can be easily thought by those skilled in the art, any combination application of each embodiment described above is feasible, so any combination of each embodiment described above is an embodiment of the present application, but due to the limitation of the length, the specification will not be described in detail here.

[0121] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the specification.

[0122] Similarly, it should be understood that, in order to simplify the present application and help understand one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present application, various features of the present application are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed application requires more features than those explicitly recited in each claim. Rather, inventive aspects are directed to less than all of the features of the single embodiment disclosed above. Therefore, the claims at the end of the detailed description, which follow the specific embodiments, are hereby expressly incorporated into this detailed description, wherein each claim is by itself a separate embodiment of the present application.

[0123] Those skilled in the art will appreciate that the modules in the apparatuses in the embodiments can be adapted and placed in one or more apparatuses other than the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and furthermore can be split into multiple sub-modules or sub-units or sub-components. Any combination of all the features disclosed in the specification (including the accompanying claims, abstract and drawings), and any method or process or apparatus of any combination of the features disclosed in the specification (including the accompanying claims, abstract and drawings) can be taken, except that at least some of such features and / or processes or units are mutually exclusive, unless explicitly stated otherwise. Each feature disclosed in the specification (including the accompanying claims, abstract and drawings) can be replaced by alternative features providing the same, equivalent or similar function, unless explicitly stated otherwise.

[0124] A computer readable storage medium storing a computer program used in conjunction with a control motherboard, the computer program executable by a processor to perform the method described in the above embodiments.

[0125] A computer program product comprising computer program / computer executable instructions to, when executed by a processor in a control motherboard, implement the method described in any of the above inventive embodiments.

[0126] Those skilled in the art will appreciate that embodiments of the present embodiments can be provided as methods, apparatuses, or computer program products. Accordingly, embodiments of the present embodiments can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present embodiments can take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) embodying computer program instructions.

[0127] Embodiments of the present embodiments are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the present embodiments. It is understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processing device, or other programmable data processing terminal devices to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal devices, create means for implementing the functions specified in the flowcharts and / or block diagrams block or blocks. Figure 1 An apparatus for implementing each flow or multiple flows and / or blocks Figure 1 An apparatus for implementing the functions specified in each block or multiple blocks.

[0128] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the flow Figure 1 one or more flows and / or blocks Figure 1 one or more blocks or steps.

[0129] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the flow Figure 1 one or more flows and / or blocks Figure 1 one or more blocks or steps.

[0130] Although preferred embodiments of the present application have been described, those skilled in the art will be able to make additional changes and modifications thereto without departing from the scope of the present application. Accordingly, it is intended to embrace all such changes and modifications as fall within the scope of the present application.

[0131] Finally, it is to be understood that the phraseology or terminology employed herein, such as "first" and "second", etc., are for descriptive purposes only and should not be construed to be limiting unless otherwise indicated. Moreover, the use of "including", "comprising", or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless otherwise indicated, the use of "or" is to be interpreted as inclusive so that "A or B" means "A or B or both".

[0132] The compressor control method, the compressor control device, the control mainboard and the household appliance provided by the present application are described in detail above, and the principles and implementation manners of the present application are described by using specific examples in the present application. The above description of the embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, according to the idea of the present application, the specific implementation manners and application ranges can be changed by those skilled in the art. In conclusion, the content of the present application should not be understood as a limitation of the present application.

Claims

1. A method for controlling a compressor, characterized in that: The control method includes: In response to a shutdown instruction, detecting a power on / off state; determining a target shutdown strategy associated with the power on / off state, and executing the target shutdown strategy to shut down the compressor; The rotor position information of the compressor when it is currently stopped is stored, and the rotor position information is used as the initial rotor position information when the compressor is started next time.

2. The compressor control method according to claim 1, characterized in that: When the power on / off state is a power off state, executing the target shutdown strategy includes: A discharge module located in the busbar of the compressor is driven to operate so that the electric energy in the busbar capacitor of the compressor is released through the discharge module.

3. The compressor control method according to claim 2, characterized in that: The discharge module includes a control switch tube and a discharge resistor connected in series with the control switch tube, and the bus capacitor is arranged in parallel with the discharge module; The driving of the discharge module located in the busbar of the compressor to operate includes: The control switch tube is driven to be turned on, so that the control switch tube, the discharge resistor and the bus capacitor form a discharge loop for discharge.

4. The method for controlling a compressor according to claim 2, wherein: The control method further includes: Before driving the discharge module to discharge, the rotor position information of the compressor is detected and used as the rotor position information when the compressor is shut down.

5. The method for controlling a compressor according to claim 1, wherein: When the power on / off state is the power on state, executing the target shutdown strategy includes: reducing the operating frequency of the compressor and controlling the compressor to enter an electric energy feedback state; If it is detected that the operating frequency is lower than the set shutdown frequency, the electronic expansion valve is closed to block the refrigerant input to the suction end of the compressor.

6. The method for controlling a compressor according to claim 5, wherein: Before closing the electronic expansion valve, the rotor position information of the compressor is detected and used as the rotor position information during shutdown.

7. The method for controlling a compressor according to claim 1, wherein: The control method further includes: In response to a compressor start instruction, obtaining initial rotor position information; The compressor is started according to the initial rotor position information.

8. A control device for a compressor, characterized in that: The control device comprises: A status detection module, configured to detect a power on / off status in response to a shutdown instruction; a strategy execution module, configured to determine a target shutdown strategy associated with the power on / off state, and execute the target shutdown strategy to shut down the compressor; The position storage module is used to store the rotor position information of the compressor when it is currently stopped, and use the rotor position information as the initial rotor position information when the compressor is started next time.

9. A control motherboard, characterized in that: include: one or more processors; Memory; One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to execute the method according to any one of claims 1 to 7.

10. A household appliance comprising a compressor and the control mainboard according to claim 9, wherein the control mainboard is electrically connected to the compressor to control the operation of the compressor.

11. A computer-readable storage medium storing a computer program used in conjunction with a control motherboard, characterized in that: The computer program can be executed by a processor to implement the method according to any one of claims 1 to 7.

12. A computer program product comprising a computer program / computer executable instructions, characterized in that The computer program / computer executable instructions, when executed by the processor in the control motherboard, implement the method according to any one of claims 1 to 7.

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