WO2021120388A1 - 压力保护电路、控制方法和计算机可读存储介质 - Google Patents

压力保护电路、控制方法和计算机可读存储介质 Download PDF

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Publication number
WO2021120388A1
WO2021120388A1 PCT/CN2020/076442 CN2020076442W WO2021120388A1 WO 2021120388 A1 WO2021120388 A1 WO 2021120388A1 CN 2020076442 W CN2020076442 W CN 2020076442W WO 2021120388 A1 WO2021120388 A1 WO 2021120388A1
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WIPO (PCT)
Prior art keywords
signal
control
module
pressure
switch
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PCT/CN2020/076442
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English (en)
French (fr)
Inventor
张晓东
Original Assignee
广东美的暖通设备有限公司
美的集团股份有限公司
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Application filed by 广东美的暖通设备有限公司, 美的集团股份有限公司 filed Critical 广东美的暖通设备有限公司
Priority to EP20902060.1A priority Critical patent/EP3992458A4/en
Publication of WO2021120388A1 publication Critical patent/WO2021120388A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0292—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves

Definitions

  • This application relates to the technical field of compressor driving, and in particular to a pressure protection circuit, a pressure protection control method, and a computer-readable storage medium.
  • Pressure protection circuit and pressure protection circuit are a kind of protection circuit commonly used in air conditioning systems, but in current circuits, only over-pressure protection is provided. When the circuit fails, there is no effective detection method to determine whether the protection circuit is effective. Protection, when the circuit really fails, it is impossible to detect and judge and deal with it, which will cause the system pressure to continue to rise and cause danger.
  • This application aims to solve at least one of the technical problems existing in the prior art or related technologies.
  • an object of the present application is to provide a pressure protection circuit.
  • Another object of the present application is to provide a pressure protection control method.
  • Another object of the present application is to provide a computer-readable storage medium.
  • a pressure protection circuit including: a drive module, which is electrically connected to the compressor; and a pressure switch module, which is arranged between the drive module and the power supply circuit of the compressor for Output switch signal, the switch signal is used to control the power supply circuit and the drive module to be turned on or off;
  • the control module is electrically connected to the drive module and the pressure switch module, and is used to input drive control signals to the drive module so that the drive module controls according to the drive The signal controls the operation of the compressor; the control module is also used to: detect that the switch signal does not match the bus signal of the drive module, and control the compressor to stop running.
  • the pressure protection circuit includes a drive module, a pressure switch module, and a control module.
  • the pressure switch module can detect the working condition of the compressor, and when abnormal operation of the compressor is detected, The control power supply circuit is disconnected from the drive module to stop the power supply to the compressor, so that the compressor stops running.
  • the diagnostic function of the control module is added. By detecting whether the state of the switch signal matches the state of the bus signal of the drive module, when the above relationship is detected, it indicates that the control of the pressure switch module remains valid. When the above relationship does not match, it indicates that the pressure switch module control fails. At this time, the compressor is controlled to stop running, thereby preventing the compressor from operating under the failure of the pressure switch module, reducing the probability of abnormal operation, and improving the safety of compressor operation And reliability.
  • the compressor includes a pressure vessel
  • the pressure switch module includes: a pressure switch for detecting a pressure signal of the pressure vessel, and generating a corresponding switch signal according to the pressure signal; a power control switch, which is arranged in the drive module and the power supply circuit It is electrically connected to the pressure switch.
  • the power control switch is used to close the power supply circuit with the drive module according to the switch signal, or disconnect the power supply circuit from the drive module according to the switch signal.
  • the pressure switch module includes a pressure switch and a power control switch.
  • the pressure switch is specifically an electronic switch and can detect the working condition of the compressor, specifically detecting whether the pressure signal of the pressure vessel is abnormal to determine whether the compressor is working abnormally If it is detected that the pressure signal is too large, there is a risk of pipe bursting in the compressor pipeline.
  • the pressure switch sends an off switch signal to the power control switch to disconnect the drive module and the power supply circuit through the power control switch.
  • the above-mentioned diagnosis function of the control module is added to take timely remedial measures when the power control switch fails to reduce the risk of failure operation.
  • a pressure sensor can be provided at the outlet of the pressure vessel, so that the pressure sensor can be used to detect the pressure signal.
  • the power control switch includes any one of a relay, a contactor, and a semiconductor power switch.
  • the relay has the risk of contact sticking, if the relay sticks after being closed, it will no longer respond to the switch signal of the pressure switch or the control signal of the control module, that is, it cannot be effectively disconnected after receiving the switch-off signal. At this time, the control module needs to directly control the compressor to stop running.
  • control module includes: a separate integrated control chip; or the control module includes a first control chip and a second control chip, wherein the first control chip is electrically connected to the drive module for driving The module outputs the drive control signal.
  • the second control chip is electrically connected to the drive module to obtain the bus signal.
  • the second control chip is also connected to the connection point between the pressure switch and the power control switch to obtain the switching signal.
  • the second control chip It is also electrically connected with the first control chip to control the first control chip to stop outputting the driving control signal when detecting that the switch signal does not match the bus signal, so that the compressor stops running.
  • control module can be realized by adopting an integrated control chip, or can be realized by arranging the above-mentioned two first control chips and second control chips.
  • the use of an integrated control chip is conducive to the simplified configuration of the circuit, and since the pressure protection circuit in the related art is already provided with a control chip with the same function as the first control chip, it is added to the pressure protection circuit in the related art
  • the second control chip defined in this application not only realizes abnormal diagnosis, detection and control, but also helps reduce manufacturing costs.
  • the compressor can still be effectively stopped when the first control chip is abnormal, so as to ensure the safety of the system.
  • the driving module includes a driving chip, the driving chip is electrically connected to the first control chip and the second control chip, the driving chip is used to unlock the driving control signal; the second control chip is also used to: control the shutdown Driver chip.
  • the second control chip can also directly control the driving chip of the driving module to turn off, so as to ensure the reliability of controlling the compressor to stop running.
  • the pressure switch is arranged at the outlet of the pressure vessel, and the pressure switch further includes: a pressure sensor for detecting the pressure signal; a microprocessor, which is electrically connected to the pressure sensor, and the microprocessor for detecting the pressure signal Is greater than or equal to the pressure threshold, the switch signal is configured with the switch-off signal, the switch-off signal is used to control the power control switch to turn off; the second control chip is also used to: if the switch-off signal is detected and the bus signal has not entered the attenuation state, then Make sure that the switch signal does not match the bus signal.
  • the pressure switch detects that the pressure signal is greater than or equal to the pressure threshold, that is, overvoltage is detected, it sends a shutdown signal to the relay, and the second control chip receives the power-off signal at this time.
  • the second control chip actively detects the change of the bus voltage of the drive module. If the bus voltage continues to drop, it indicates that the relay is normally disconnected. If the bus voltage does not change, it indicates that the relay is not normally disconnected. At this time, the second control chip turns off the compressor.
  • the driving chip is the first control chip, and the first control chip turns off and stops outputting the driving module to output the driving control signal.
  • the pressure threshold may be the maximum pressure value that can ensure the normal operation of the compressor.
  • the second control chip is also used to: if the shutdown signal is detected and the bus signal enters an attenuation state, it is determined that the switch signal matches the bus signal, and the microprocessor is also used to: The signal configures the switch signal, and the closing signal is used to control the closing of the power control switch; the second control chip is also used to: if the closing signal is detected and the bus signal enters an increasing state, it is determined that the switching signal matches the bus signal.
  • control power supply for supplying power to the control module; the control power supply is also used for: supplying power to the pressure switch, and making the pressure switch according to the power supply signal of the control power supply and the detection result of the pressure signal , Generate the corresponding switch signal to output the power supply signal to the power control switch according to the switch signal, or stop outputting the power supply signal.
  • the power control switch determines whether to turn on or off according to whether it receives the power supply signal of the control power supply. Under normal operating conditions, if the power supply signal is stopped, the power control switch will automatically turn off. Under abnormal operating conditions For example, the above-mentioned contact adhesion occurs. After the contact is connected and the adhesion occurs, even if the power supply signal is stopped, the power control switch is still in the on state. In this case, the compressor has the risk that the operating pressure will continue to increase. Control the compressor to stop running to avoid this risk as much as possible.
  • the drive module includes an intelligent power module and/or an IGBT module, the intelligent power module and/or IGBT module are both provided with transistor components, and the first control chip is also used to: It is configured as a drive control signal, and the pulse width modulation signal is used to control the on and off of the transistor component.
  • the drive module may include a rectifier, a PFC module, and an IPM (Intelligent Power Module) module, etc., or may only include an IPM module.
  • the drive control of the compressor motor can therefore control the compressor motor to stop running by stopping the output of the drive control signal, so as to ensure the controllability of the compressor operation.
  • the technical solution of the second aspect of the present application provides a pressure protection control method, including: detecting that the bus signal of the driving module does not match the working state of the pressure switch module, and controlling the compressor to stop running.
  • the pressure switch module can detect the working condition of the compressor, and when an abnormal operation of the compressor is detected, the control power supply circuit is disconnected from the drive module to stop the compressor. The machine supplies power to stop the compressor.
  • the diagnosis function is added. By detecting whether the state of the switch signal matches the state of the bus signal of the drive module, when the above relationship is detected, it indicates that the pressure switch module control remains in an effective state. When matched, it indicates that the pressure switch module control fails. At this time, the compressor is controlled to stop running, thereby preventing the compressor from operating under the failure of the pressure switch module, reducing the probability of abnormal operation, thereby improving the safety and reliability of the compressor operation .
  • the compressor includes a pressure vessel, detects that the bus signal of the drive module does not match the working state of the pressure switch module, and controls the compressor to stop running, which specifically includes: responding to the acquired output of the pressure switch module to turn off Signal, detect the bus signal; if it is detected that the bus signal does not fall to the voltage threshold within the specified time, it is determined that the working state does not match, so as to control the compressor to stop running.
  • the shut-off signal detects the pressure signal of the pressure vessel in the pressure switch module Generated when the pressure threshold is greater than or equal to.
  • the relay if an overvoltage is detected, it triggers the detection of the change in the bus voltage of the drive module. If the bus voltage continues to drop, it indicates that the relay is normally disconnected. If the bus voltage does not change, it indicates that the relay If it is not normally disconnected, the control stops outputting the drive control signal at this time to prevent the relay from failing, and the above-mentioned diagnosis function of the control module is added to take timely remedial measures when the power control switch fails to reduce the risk of failure operation.
  • the compressor is controlled to stop running, which specifically includes: in response to the start signal, before the pressure switch module runs, controlling the drive module Output drive drive control signal; if the bus signal is detected to be in an increasing state, it is determined that the working state does not match, and the compressor is controlled to stop running.
  • the pressure switch has not output a closed switching signal to the relay after it is turned on, and it has been detected.
  • the bus voltage of the drive module reaches a larger voltage value, it can also be considered that the relay is working abnormally, so that the compressor is controlled to stop and continue to run, so as to ensure the safety of the compressor.
  • controlling the compressor to stop running specifically includes: controlling to stop outputting drive control signals to the drive module, and/or controlling to turn off the drive chip of the drive module, wherein the drive module also includes an intelligent power module and/ Or IGBT modules, smart power modules and/or IGBT modules are all provided with transistor components, the pulse width modulation signal is configured as a drive control signal, and the pulse width modulation signal is used to control the on and off of the transistor component.
  • the drive module may include a rectifier, a PFC module, and an IPM (Intelligent Power Module) module, etc., or may only include an IPM module.
  • the drive control of the compressor motor can therefore control the compressor motor to stop running by stopping the output of the drive control signal, so as to ensure the controllability of the compressor operation.
  • the pressure switch module includes a relay provided between the drive module and the power supply circuit
  • the pressure protection control method further includes: if the bus signal is detected to be mismatched with the working state, determining that the relay is abnormal, and generating Abnormal alarm information.
  • the abnormal alarm information is transmitted to the user to guide the user to solve the abnormality in time.
  • the technical solution of the third aspect of the present application provides a computer-readable storage medium.
  • the steps of the pressure protection control method defined by any one of the above technical solutions are implemented, so it has any one of the above technical solutions.
  • the technical effects of the limited control method will not be repeated here.
  • Fig. 1 shows a schematic circuit diagram of a pressure protection circuit according to an embodiment of the present application
  • Fig. 2 shows a schematic circuit diagram of a pressure protection circuit according to another embodiment of the present application
  • Fig. 3 shows a schematic flow chart of a pressure protection control method according to an embodiment of the present application
  • Fig. 4 shows a schematic flow chart of a pressure protection control method according to another embodiment of the present application.
  • Fig. 5 shows a schematic block diagram of a computer-readable storage medium according to an embodiment of the present application.
  • the pressure protection circuit As shown in FIG. 1, the pressure protection circuit according to an embodiment of the present application is used to protect the operation of the compressor 10.
  • the compressor 10 includes a pressure vessel, and the pressure protection circuit includes: a power supply circuit 20, a drive module 30, and a pressure switch module 40 With control module 50.
  • the driving module 30 is electrically connected to the compressor 10.
  • the pressure switch module 40 is arranged between the drive module 30 and the power supply circuit 20 of the compressor 10 for outputting a switch signal, and the switch signal is used to control the conduction or disconnection of the power supply circuit 20 and the drive module 30.
  • the pressure switch module 40 includes a pressure switch 402 and a power control switch that are electrically connected.
  • the pressure switch 402 is used to detect the pressure signal of the pressure vessel and generate a corresponding switch signal according to the pressure signal.
  • the power control switch is placed in the drive
  • the module 30 and the power supply circuit 20 are used to close the power supply circuit 20 and the drive module 30 according to the switch signal, or disconnect the power supply circuit 20 and the drive module 30 according to the switch signal.
  • the power control switch includes any one of a relay 404, a contactor, and a semiconductor power switch.
  • the pressure switch 402 is specifically an electronic switch, and can detect the working condition of the compressor 10, specifically to detect whether the pressure signal of the pressure vessel is abnormal to determine whether the compressor 10 is working abnormally, if it is detected that the pressure signal is too large, there is a compressor 10 Risk of pipe bursting. At this time, the pressure switch 402 sends an off switch signal to the power control switch to disconnect the connection between the drive module 30 and the power supply circuit 20 through the power control switch to stop the compressor 10
  • the above-mentioned diagnosis function of the control module 50 is added to take timely remedial measures when the power control switch fails to reduce the risk of failure operation.
  • the pressure switch 402 is provided at the outlet of the pressure vessel, and the pressure switch 402 further includes: a pressure sensor for detecting a pressure signal; a microprocessor, which is electrically connected to the pressure sensor, and The processor is used to detect that the pressure signal is greater than or equal to the pressure threshold, and configure the switch signal by using the turn-off signal, the turn-off signal is used to control the power supply 60 to control the switch to turn off; the second control chip 504 is also used to: if the turn-off signal is detected, And the bus signal does not enter the attenuation state, it is determined that the switch signal does not match the bus signal.
  • the relay 404 since the relay 404 has the risk of contact sticking, if the relay 404 is closed and then sticks, it will no longer respond to the switch signal of the pressure switch 402 or the control signal of the control module 50, that is, after receiving the switch-off signal If the pressure switch 402 detects that the pressure signal is greater than or equal to the pressure threshold, the pressure switch 402 detects that the pressure signal is greater than or equal to the pressure threshold, and sends a shutdown signal to the relay 404. At the same time, the second The control chip 504 receives the power-off signal. At this time, the second control chip 504 actively detects the change of the bus voltage of the driving module 30. If the bus voltage continues to drop, it indicates that the relay 404 is normally disconnected.
  • the second control chip 504 turns off the compressor 10 driving chip 302, that is, the first control chip 502, and the first control chip 502 turns off and stops the output driving module 30 from outputting the driving control signal.
  • the pressure threshold may be the maximum pressure value that can ensure the normal operation of the compressor 10.
  • the control module 50 is electrically connected to the drive module 30 and the pressure switch module 40 for inputting drive control signals to the drive module 30.
  • the driving module 30 is also used to control the operation of the compressor 10 according to the driving control signal.
  • the control module 50 is also used to: detect that the switch signal does not match the bus signal of the drive module 30, and control the compressor 10 to stop running.
  • the pressure switch module 40 can detect the working condition of the compressor 10, and when an abnormal operation of the compressor 10 is detected, the control power supply circuit 20 is disconnected from the drive module 30 to stop the compressor 10 10 supplies power to stop the compressor 10 from running.
  • the diagnostic function of the control module 50 is added. By detecting whether the state of the switch signal matches the state of the bus signal of the drive module 30, when the above relationship is detected, it indicates that the control of the pressure switch module 40 remains effective. When detecting that the above relationship does not match, it indicates that the pressure switch module 40 has failed to control. At this time, the compressor 10 is controlled to stop running, so as to prevent the compressor 10 from operating under the operating conditions where the pressure switch module 40 fails, and reduce the probability of abnormal operation. The safety and reliability of the operation of the compressor 10 can be improved.
  • control module 50 is further defined.
  • the control module 50 includes: a separate integrated control chip, and the use of an integrated control chip is beneficial to simplify the circuit configuration.
  • the integrated control chip by setting an integrated control chip, there is no need to add a chip with a diagnostic function, and the judgment is made by the integrated control chip's diagnostic switch signal (for example, whether the +12V voltage is input) and the bus voltage.
  • the control module 50 is further defined, including: a first control chip 502, electrically connected to the driving module 30, for outputting a driving control signal to the driving module 30;
  • the control chip 504 is electrically connected to the driving module 30 to obtain the bus signal;
  • the second control chip 504 is also connected to the connection point between the pressure switch 402 and the power control switch to obtain the switching signal;
  • the second control chip 504 is also connected to the first
  • a control chip 502 is electrically connected to control the first control chip 502 to stop outputting the driving control signal when detecting that the switch signal does not match the bus signal, so that the compressor 10 stops running.
  • the pressure protection circuit in the related art is already provided with a control chip with the same function as the first control chip 502, the second control chip defined in this application is added to the pressure protection circuit in the related art. 504. While realizing abnormal diagnosis, detection and control, it is conducive to reducing production costs.
  • the second control chip 504 can also directly control the driving module 30, specifically including: the driving module 30 includes a driving chip 302, the driving chip 302 is electrically connected to the first control chip 502 and the second control chip 504, and the driving chip 302 is used for Unlock the driving control signal; the second control chip 504 is also used to control the closing of the driving chip 302.
  • the second control chip 504 can also directly control the driving chip 302 of the driving module 30 to turn off, so as to ensure the reliability of controlling the compressor 10 to stop running, and by setting the second control chip 504, in the first control When the chip 502 is abnormal, the compressor 10 can still be effectively stopped to ensure the safety of the system.
  • the second control chip 504 is also used for: if the switch-off signal is detected and the bus signal enters the attenuation state, it is determined that the switch signal matches the bus signal, and the microprocessor is also used for: configure the switch signal with the switch signal, and the switch signal is used for the switch signal.
  • the control power supply 60 controls the switch to be closed; the second control chip 504 is also used for: if the closing signal is detected and the bus signal enters an increasing state, it is determined that the switch signal matches the bus signal.
  • the switch signal matches with the bus signal of the drive module 30, and when the compressor 10 is controlled to stop running under the condition that does not match, the matched operating condition corresponds to the normal operation of the compressor 10 Working conditions to ensure the integrity of pressure protection control.
  • a second control chip 504 with diagnostic function is added to use the second control chip 504 to detect the bus voltage value of the drive module 30 when the pressure switch 402 is activated to determine whether the contact of the relay 404 is effectively disconnected.
  • the second control chip 504 turns off the first control chip 502 of the driving module 30 so that the first control chip 502 turns off the control signal of the relay 404 and the drive control signal of the compressor 10.
  • the pressure protection circuit further includes: a control power supply 60 for supplying power to the control module 50; the control power supply 60 is also used for supplying power to the pressure switch 402, and making the pressure switch 402 according to The power supply signal of the control power supply 60 and the detection result of the pressure signal generate a corresponding switch signal to output a power supply signal to the power control switch according to the switch signal, or stop outputting the power supply signal.
  • the power control switch determines whether to turn on or off according to whether the power supply signal of the control power supply 60 is received. Under normal operating conditions, if the power supply signal is stopped, the power control switch will automatically turn off. For example, if the above-mentioned contact adhesion occurs, after the contact is turned on and the adhesion occurs, even if the power supply signal is stopped, the power control switch is still in the on state. In this case, there is a risk that the operating pressure of the compressor 10 will continue to increase. , By controlling the compressor 10 to stop running, so as to avoid this risk as much as possible.
  • the driving module 30 includes a smart power module and/or an IGBT module, and the smart power module and/or IGBT module are both provided with transistor components, and the first control chip 502 is also used to:
  • the modulation signal is configured as a drive control signal, and the pulse width modulation signal is used to control the on-off of the transistor component.
  • the driving module 30 may include a rectifier, a PFC module, and an IPM (Intelligent Power Module) module, etc., or may only include an IPM module.
  • the driving module 30 By outputting a driving control signal to the driving module 30, the power supply loop 20 is turned on.
  • the drive control of the motor of the compressor 10 is realized, so it is possible to control the motor of the compressor 10 to stop running by stopping the output of the drive control signal, so as to ensure the controllability of the operation of the compressor 10.
  • FIG. 3 shows the pressure protection control method according to an embodiment of the application, including:
  • Step 602 It is detected that the bus signal of the driving module does not match the working state of the pressure switch module, and the compressor is controlled to stop running.
  • the pressure switch module in the process of controlling the operation of the compressor, can detect the working condition of the compressor, and when an abnormal operation of the compressor is detected, the control power supply circuit is disconnected from the drive module to stop the compressor. The machine supplies power to stop the compressor.
  • the diagnosis function is added. By detecting whether the state of the switch signal matches the state of the bus signal of the drive module, when the above relationship is detected, it indicates that the pressure switch module control remains in an effective state. When matched, it indicates that the pressure switch module control fails. At this time, the compressor is controlled to stop running, thereby preventing the compressor from operating under the failure of the pressure switch module, reducing the probability of abnormal operation, thereby improving the safety and reliability of the compressor operation .
  • controlling the compressor to stop running specifically includes: controlling to stop outputting drive control signals to the drive module and/or controlling to turn off the drive chip of the drive module, where the drive module includes an intelligent power module and/or IGBT
  • the drive module includes an intelligent power module and/or IGBT
  • the modules, smart power modules and/or IGBT modules are all provided with transistor components, the pulse width modulation signal is configured as a drive control signal, and the pulse width modulation signal is used to control the on and off of the transistor components.
  • the drive module may include a rectifier, a PFC module, and an IPM (Intelligent Power Module) module, etc., or may only include an IPM module.
  • the drive control of the compressor motor can therefore control the compressor motor to stop running by stopping the output of the drive control signal, so as to ensure the controllability of the compressor operation.
  • the compressor is controlled to stop running, which specifically includes: in response to the acquired shutdown signal output by the pressure switch module, detecting Bus signal: If it is detected that the bus signal does not fall to the voltage threshold within the specified time, it is determined that the working status does not match to control the compressor to stop running.
  • the shutdown signal is detected by the pressure switch module that the pressure signal of the pressure vessel is greater than or equal to Generated when the pressure threshold.
  • the relay if an overvoltage is detected, it triggers the detection of the change in the bus voltage of the drive module. If the bus voltage continues to drop, it indicates that the relay is normally disconnected. If the bus voltage does not change, it indicates that the relay If it is not normally disconnected, the control stops outputting the drive control signal at this time to prevent the relay from failing, and the above-mentioned diagnosis function of the control module is added to take timely remedial measures when the power control switch fails to reduce the risk of failure operation.
  • the pressure switch has not output a closed switching signal to the relay after it is turned on, and it has been detected.
  • the bus voltage of the drive module reaches a larger voltage value, it can also be considered that the relay is working abnormally, so that the compressor is controlled to stop and continue to run, so as to ensure the safety of the compressor.
  • a further supplement to the pressure protection control method in this application further includes: the pressure switch module includes a relay provided between the drive module and the power supply circuit, and the pressure protection control method further includes : If it is detected that the bus signal does not match the working state, the relay is determined to be abnormal, and an abnormal alarm message is generated.
  • abnormal alarm information is transmitted to the user to guide the user to solve the abnormality in time.
  • FIG. 4 shows a pressure protection control method according to another embodiment of the application, including:
  • step S702 the second control chip operates normally.
  • step S704 it is detected whether a power supply signal is output to the relay, if "yes”, step S712 is executed, and if "no", step S706 is executed.
  • step S706 it is detected whether the bus signal has fallen to the voltage threshold within the specified time period, if "yes”, step S710 is executed, and if "no", step S708 is executed.
  • step S708 it is determined that the relay contact is stuck, the driving chip of the compressor is turned off, and the first control chip is controlled to stop outputting the relay control signal and the driving control signal.
  • step S710 the compressor stops running.
  • step S712 the compressor operates normally.
  • a compressor is provided in the air conditioning system.
  • the compressor includes a pressure vessel.
  • the pressure in the pressure vessel will change when the compressor is working.
  • the power supply signal of the relay is disconnected to make The contact of the relay is disconnected, which in turn disconnects the power supply of the compressor drive module and stops the compressor.
  • the second control chip detects that the power supply signal +12V of the relay is disconnected. At this time, it detects the bus voltage Vdc in the drive module. If the relay contacts are normally disconnected, the Vdc will continue to drop. If the head is stuck, the Vdv voltage keeps the current state. When the second control chip detects that the Vdc voltage has not fallen to the set voltage value within the set time, it turns off the driving chip of the compressor to stop the compressor.
  • the second control chip When the second control chip detects the adhesion of the relay, it simultaneously informs the first control chip to turn off the compressor drive signal and the relay control signal.
  • the second control chip When it is detected that the overpressure protection circuit is working, that is, the Vdc voltage is effectively reduced, the second control chip operates normally and no other actions are performed.
  • the control module detects the relay sticking, turns off the compressor drive chip, stops the compressor, and at the same time makes the first control chip turn off the drive signal And the relay control signal, make the system enter the safe state, guarantee the safety and reliability of the system.
  • the embodiment of the present application also provides a computer-readable storage medium 800.
  • the computer-readable storage medium 800 stores a computer program 802.
  • the computer program 802 is executed by a processor, any of the foregoing implementations is implemented.
  • the steps of the cooking control method disclosed in the examples have the technical effects of the cooking control method of any of the above embodiments, and will not be repeated here.
  • the pressure switch module in the process of controlling the operation of the compressor, can detect the working condition of the compressor, and when an abnormal operation of the compressor is detected, the control power supply circuit is disconnected from the drive module to stop the compressor. The machine supplies power to stop the compressor.
  • the diagnosis function is added. By detecting whether the state of the switch signal matches the state of the bus signal of the drive module, when the above relationship is detected, it indicates that the pressure switch module control remains in an effective state. When matched, it indicates that the pressure switch module control fails. At this time, the compressor is controlled to stop running, thereby preventing the compressor from operating under the failure of the pressure switch module, reducing the probability of abnormal operation, thereby improving the safety and reliability of the compressor operation .
  • the compressor includes a pressure vessel, and detecting that the bus signal of the driving module does not match the working state of the pressure switch module, and controlling the compressor to stop running, specifically includes: responding to the obtained output of the pressure switch module to turn off Signal, detect the bus signal; if it is detected that the bus signal does not fall to the voltage threshold within the specified time, it is determined that the working state does not match to control the compressor to stop running, where the shut-off signal detects the pressure signal of the pressure vessel in the pressure switch module Generated when the pressure threshold is greater than or equal to.
  • the relay if an overvoltage is detected, it triggers the detection of the change in the bus voltage of the drive module. If the bus voltage continues to drop, it indicates that the relay is normally disconnected. If the bus voltage does not change, it indicates that the relay If it is not normally disconnected, the control stops outputting the drive control signal at this time to prevent the relay from failing, and the above-mentioned diagnosis function of the control module is added to take timely remedial measures when the power control switch fails to reduce the risk of failure operation.
  • detecting that the bus signal of the drive module does not match the working state of the pressure switch module, and controlling the compressor to stop running includes: in response to the start signal, before the pressure switch module runs, controlling the drive module Output drive drive control signal; if the bus signal is detected to be in an increasing state, it is determined that the working state does not match, and the compressor is controlled to stop running.
  • the pressure switch has not output a closed switching signal to the relay after it is turned on.
  • the bus voltage of the drive module reaches a larger voltage value, it can also be considered that the relay is working abnormally, so that the compressor is controlled to stop and continue to run, so as to ensure the safety of the compressor.
  • controlling the compressor to stop running specifically includes: controlling to stop outputting a drive control signal to a drive module, where the drive module includes a smart power module and/or an IGBT module, and a smart power module and/or IGBT
  • the drive module includes a smart power module and/or an IGBT module, and a smart power module and/or IGBT
  • the modules are all equipped with transistor components, the pulse width modulation signal is configured as a drive control signal, and the pulse width modulation signal is used to control the on and off of the transistor component.
  • the drive module may include a rectifier, a PFC module, and an IPM (Intelligent Power Module) module, etc., or may only include an IPM module.
  • the drive control of the compressor motor can therefore control the compressor motor to stop running by stopping the output of the drive control signal, so as to ensure the controllability of the compressor operation.
  • the pressure switch module includes a relay provided between the drive module and the power supply circuit
  • the pressure protection control method further includes: if it is detected that the bus signal does not match the working state, determining that the relay is abnormal, and generating Abnormal alarm information.
  • the abnormal alarm information is transmitted to the user to guide the user to solve the abnormality in time.

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Abstract

本申请提出了一种压力保护电路、控制方法和计算机可读存储介质，其中，压力保护电路包括：驱动模块，与压缩机电连接；压力开关模块，设置于驱动模块与压缩机的供电回路之间，用于输出开关信号，开关信号用于控制供电回路与驱动模块导通或断开；控制模块，与驱动模块以及压力开关模块电连接，用于向驱动模块输入驱动控制信号，以使驱动模块根据驱动控制信号控制压缩机运行；控制模块还用于：检测到开关信号与驱动模块的母线信号不匹配，控制压缩机停止运行。通过本申请的技术方案，防止压缩机在压力开关模块失效的工况下运行，降低异常运行概率，从而能够提升压缩机运行的安全性与可靠性。

Description

压力保护电路、控制方法和计算机可读存储介质
相关申请的交叉引用
本申请基于申请号为201911300233.2，申请日为2019年12月16日申请的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及压缩机驱动技术领域，具体而言，涉及一种压力保护电路、一种压力保护控制方法和一种计算机可读存储介质。
背景技术
压力保护电路、压力保护电路是空调系统中常用的一种保护电路，但是在目前的电路中，仅仅具有对过压力的保护，当电路发生失效时没有有效的检测方式判断保护电路是否有效的进行保护，在电路真正失效时，无法检测判断并进行处理，会使系统压力持续升高，发生危险。
另外，整个说明书对背景技术的任何讨论，并不代表该背景技术一定是所属领域技术人员所知晓的现有技术，整个说明书中的对现有技术的任何讨论并不代表该现有技术一定是广泛公知的或一定构成本领域的公知常识。
发明内容
本申请旨在至少解决现有技术或相关技术中存在的技术问题之一。
有鉴于此，本申请的一个目的在于提供一种压力保护电路。
本申请的另一个目的在于提供一种压力保护控制方法。
本申请的又一个目的在于提供一种计算机可读存储介质。
为了实现上述目的，本申请第一方面的技术方案提供了一种压力保护电路，包括：驱动模块，与压缩机电连接；压力开关模块，设置于驱动模块与压缩机的供电回路之间，用于输出开关信号，开关信号用于控制供电回路与驱动模块导通或断开；控制模块，与驱动模块以及压力开关模块电连接，用于向驱动模块输入驱动控制信号，以使驱动模块根据驱动控制信号控制压缩机运行；控制模块还用于：检测到开关信号与驱动模块的母线信号不匹配，控制压缩机停止运行。
在该技术方案中，压力保护电路包括驱动模块、压力开关模块以及控制模块，在 控制压缩机运行的过程中，压力开关模块能够检测压缩机的工况，并在检测到压缩机运行异常时，控制供电回路与驱动模块断开，以停止向压缩机供电，以使压缩机停止运行。
为了防止压力开关模块控制失效，增加控制模块的诊断功能，通过检测开关信号的状态与驱动模块的母线信号的状态是否匹配，在检测上述关系匹配时，表明压力开关模块控制保持有效状态，在检测上述关系不匹配时，表明压力开关模块控制失效，此时控制压缩机停止运行，进而防止压缩机在压力开关模块失效的工况下运行，降低异常运行概率，从而能够提升压缩机运行的安全性与可靠性。
在上述技术方案中，压缩机包括压力容器，压力开关模块包括：压力开关，用于检测压力容器的压力信号，并根据压力信号生成对应的开关信号；电源控制开关，设置于驱动模块与供电回路之间，并与压力开关电连接，电源控制开关用于根据开关信号闭合使供电回路与驱动模块导通，或根据开关信号断开使供电回路与驱动模块断开。
在该技术方案中，压力开关模块包括压力开关与电源控制开关，压力开关具体为电子开关，并能够检测压缩机的工况，具体为检测压力容器的压力信号是否异常来确定压缩机是否工作异常，如果检测到导致压力信号过大，则存在压缩机管路爆管的风险，此时通过压力开关向电源控制开关发送关断的开关信号，以通过电源控制开关断开驱动模块与供电回路之间的连接，以停止向压缩机供电，为了防止电源控制开关失效，增加上述的控制模块的诊断功能，以在电源控制开关失效时及时采取补救措施，以降低失效运行风险。
具体地，可以在压力容器的出口处设置压力传感器，以采用压力传感器检测压力信号。
在上述任一项技术方案中，电源控制开关包括继电器、接触器与半导体功率开关中的任意一种。
以继电器为例，由于继电器存在触点粘连的风险，若继电器闭合后粘连，则不再响应压力开关的开关信号或控制模块的控制信号，即在接收到关断信号后也不能有效断开，此时需要控制模块直接控制压缩机停止运行。
在上述任一项技术方案中，控制模块包括：单独设置的集成控制芯片；或控制模块包括第一控制芯片与第二控制芯片，其中，第一控制芯片与驱动模块电连接，用于向驱动模块输出驱动控制信号，第二控制芯片，与驱动模块电连接，以获取母线信号，第二控制芯片还连接至压力开关与电源控制开关之间的连接点，以获取开关信号，第二控制芯片还与第一控制芯片电连接，以在检测到开关信号与母线信号不匹配，控制第一控制芯片停止输出驱动控制信号，以使压缩机停止运行。
在该技术方案中，控制模块可以采用一个集成控制芯片实现，也可以通过设置上述两个第一控制芯片与第二控制芯片实现。
其中，采用一个集成控制芯片有利于电路的简化设置，而由于相关技术中的压力保护电路中已经设置有与第一控制芯片相同功能的控制芯片，因此在相关技术的压力保护电路的基础上增加本申请限定的第二控制芯片，在实现异常诊断检测与控制的同时，有利于降低制备成本。
进一步地，通过设置第二控制芯片，在第一控制芯片异常时依然能有效停止压缩机，保证系统的安全性。
在上述任一项技术方案中，驱动模块包括驱动芯片，驱动芯片分别与第一控制芯片与第二控制芯片电连接，驱动芯片用于解锁驱动控制信号；第二控制芯片还用于：控制关闭驱动芯片。
在该技术方案中，还可以通过第二控制芯片直接控制驱动模块的驱动芯片关闭，以保证控制压缩机停止运行的可靠性。
在上述任一项技术方案中，压力开关设置于压力容器的出口，压力开关还包括：压力传感器，用于检测压力信号；微处理器，与压力传感器电连接，微处理器用于检测到压力信号大于或等于压力阈值，采用关断信号配置开关信号，关断信号用于控制电源控制开关断开；第二控制芯片还用于：若检测到关断信号，并且母线信号未进入衰减状态，则确定开关信号与母线信号不匹配。
在该技术方案中，以继电器为例，若压力开关检测到压力信号大于或等于压力阈值，即检测到过压，向继电器发送关断信号，同时第二控制芯片接收断电信号，此时第二控制芯片主动检测驱动模块的母线电压的变化情况，如果母线电压持续下降，表明继电器正常断开，如果母线电压没有变化，则表明继电器未正常断开，此时第二控制芯片关断压缩机驱动芯片，即第一控制芯片，第一控制芯片关停止输出驱动模块输出驱动控制信号。
其中，压力阈值可以为能够保证压缩机正常运行的最大压力值。
在上述任一项技术方案中，第二控制芯片还用于：若检测到关断信号，并且母线信号进入衰减状态，则确定开关信号与母线信号匹配，以及微处理器还用于：采用闭合信号配置开关信号，闭合信号用于控制电源控制开关闭合；第二控制芯片还用于：若检测到闭合信号，并且母线信号进入增长状态，则确定开关信号与母线信号匹配。
在该技术方案中，检测开关信号与所述驱动模块的母线信号之间是否匹配，在限定出不匹配的工况下控制压缩机停止运行时，匹配的工况对应于压缩机正常运行的工况，从而保证压力保护控制的完整性。
在上述任一项技术方案中，还包括：控制电源，用于向控制模块供电；控制电源还用于：向压力开关供电，并使压力开关根据控制电源的供电信号与对压力信号的检测结果，生成对应的开关信号，以根据开关信号向电源控制开关输出供电信号，或停止输出供电信号。
在该技术方案中，电源控制开关根据是否接收到控制电源的供电信号来确定导通或断开，正常工况下，若停止接收供电信号，电源控制开关会自动断开，在异常工况下，比如出现上述的触点粘连，在触点接触导通并发生粘连后，即便供电信号停止，电源控制开关仍处于导通状态，这种情况下压缩机存在运行压力继续增大的风险，通过控制压缩机停止运行，以尽量规避该风险。
在上述任一项技术方案中，驱动模块包括智能功率模块和/或IGBT模组，智能功率模块和/或IGBT模组均设置有晶体管组件，第一控制芯片还用于：将脉冲宽度调制信号配置为驱动控制信号，脉冲宽度调制信号用于控制晶体管组件通断。
在该技术方案中，驱动模块可以包括整流器、PFC模块、与IPM(智能功率模块)模块等，也可以只包括IPM模块，通过向驱动模块输出驱动控制信号，在供电回路导通的同时，实现对压缩机的电机的驱动控制，因此能够通过停止输出驱动控制信号，控制压缩机的电机停止运行，以保证压缩机运行的可控性。
本申请第二方面的技术方案提供了一种压力保护控制方法，包括：检测到驱动模块的母线信号与压力开关模块的工作状态不匹配，控制压缩机停止运行。
在该技术方案中，压在控制压缩机运行的过程中，压力开关模块能够检测压缩机的工况，并在检测到压缩机运行异常时，控制供电回路与驱动模块断开，以停止向压缩机供电，以使压缩机停止运行。
为了防止压力开关模块控制失效，增加诊断功能，通过检测开关信号的状态与驱动模块的母线信号的状态是否匹配，在检测上述关系匹配时，表明压力开关模块控制保持有效状态，在检测上述关系不匹配时，表明压力开关模块控制失效，此时控制压缩机停止运行，进而防止压缩机在压力开关模块失效的工况下运行，降低异常运行概率，从而能够提升压缩机运行的安全性与可靠性。
在上述技术方案中，压缩机包括压力容器，检测到驱动模块的母线信号与压力开关模块的工作状态不匹配，控制压缩机停止运行，具体包括：响应于获取到的压力开关模块输出的关断信号，检测母线信号；若检测到母线信号在指定时长内未下降至电压阈值，确定工作状态不匹配，以控制压缩机停止运行，其中，关断信号在压力开关模块检测到压力容器的压力信号大于或等于压力阈值时生成。
在该技术方案中，以继电器为例，若检测到过压，则触发检测驱动模块的母线电 压的变化情况，如果母线电压持续下降，表明继电器正常断开，如果母线电压没有变化，则表明继电器未正常断开，此时控制停止输出驱动控制信号，以防止继电器失效，增加上述的控制模块的诊断功能，以在电源控制开关失效时及时采取补救措施，以降低失效运行风险。
在上述任一项技术方案中，检测到驱动模块的母线信号与压力开关模块的工作状态不匹配，控制压缩机停止运行，具体包括：响应于开机信号，在压力开关模块运行之前，控制驱动模块输出驱动驱动控制信号；若检测到母线信号处于增长状态，确定工作状态不匹配，并控制压缩机停止运行。
在该技术方案中，还可以在控制压缩机开始运行阶段，检测驱动模块的母线信号与压力开关模块的工作状态是否匹配，比如开机后压力开关还未向继电器输出闭合的开关信号，已经检测到了驱动模块的母线电压达到了较大的电压值，则也可以认为继电器工作异常，从而控制压缩机停止继续运行，以保证压缩机运行的安全性。
在上述任一项技术方案中，控制压缩机停止运行，具体包括：控制停止向驱动模块输出驱动控制信号，和/或控制关闭驱动模块的驱动芯片，其中，驱动模块还包括智能功率模块和/或IGBT模组，智能功率模块和/或IGBT模组均设置有晶体管组件，将脉冲宽度调制信号配置为驱动控制信号，脉冲宽度调制信号用于控制晶体管组件通断。
在该技术方案中，驱动模块可以包括整流器、PFC模块、与IPM(智能功率模块)模块等，也可以只包括IPM模块，通过向驱动模块输出驱动控制信号，在供电回路导通的同时，实现对压缩机的电机的驱动控制，因此能够通过停止输出驱动控制信号，控制压缩机的电机停止运行，以保证压缩机运行的可控性。
在上述任一项技术方案中，压力开关模块包括设置于驱动模块与供电回路之间的继电器，压力保护控制方法还包括：若检测到母线信号与工作状态不匹配，则确定继电器异常，并生成异常报警信息。
在该技术方案中，在检测到继电器异常时，向用户传递异常报警信息，以引导用户及时解决异常。
本申请的第三方面的技术方案提供了一种计算机可读存储介质，计算机程序被处理器执行时实现上述任一项技术方案限定的压力保护控制方法的步骤，故而具有上述任一项技术方案限定的控制方法的技术效果，在此不再赘述。
本申请的附加方面和优点将在下面的描述部分中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1示出了根据本申请一个实施例的压力保护电路的电路示意图；
图2示出了根据本申请又一个实施例的压力保护电路的电路示意图；
图3示出了根据本申请一个实施例的压力保护控制方法的流程示意图；
图4示出了根据本申请又一个实施例的压力保护控制方法的流程示意图；
图5示出了根据本申请的一个实施例的计算机可读存储介质的示意框图。
其中，图1与图2中附图标记与部件名称之间的对应关系为：
10压缩机，20供电回路，30驱动模块，302驱动芯片，40压力开关模块，402压力开关，404继电器，50控制模块，502第一控制芯片，504第二控制芯片，60控制电源。
具体实施方式
为了可以更清楚地理解本申请的上述目的、特征和优点，下面结合附图和具体实施方式对本申请进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本申请，但是，本申请还可以采用其他不同于在此描述的其他方式来实施，因此，本申请的保护范围并不受下面公开的具体实施例的限制。
下面参照图1至图5描述根据本申请的一些实施例。
实施例一
如图1所示，根据本申请一个实施例的压力保护电路，用于保护压缩机10的运行，压缩机10包括压力容器，压力保护电路包括：供电回路20、驱动模块30，压力开关模块40与控制模块50。
其中，驱动模块30与压缩机10电连接。
压力开关模块40设置于驱动模块30与压缩机10的供电回路20之间，用于输出开关信号，开关信号用于控制供电回路20与驱动模块30导通或断开。
如图2所示，压力开关模块40包括电连接的压力开关402与电源控制开关，压力开关402用于检测压力容器的压力信号，并根据压力信号生成对应的开关信号，电源控制开关置于驱动模块30与供电回路20之间，用于根据开关信号闭合使供电回路20与驱动模块30导通，或根据开关信号断开使供电回路20与驱动模块30断开。
电源控制开关包括继电器404、接触器与半导体功率开关中的任意一种。
压力开关402具体为电子开关，并能够检测压缩机10的工况，具体为检测压力容器的压力信号是否异常来确定压缩机10是否工作异常，如果检测到导致压力信号过大，则存在压缩机10管路爆管的风险，此时通过压力开关402向电源控制开关发送关断的开关信号，以通过电源控制开关断开驱动模块30与供电回路20之间的连接，以停止向压缩机10供电，为了防止电源控制开关失效，增加上述的控制模块50的诊断功能，以在电源控制开关失效时及时采取补救措施，以降低失效运行风险。
作为检测压缩机10的工况的一种实施方式，压力开关402设置于压力容器的出口，压力开关402还包括：压力传感器，用于检测压力信号；微处理器，与压力传感器电连接，微处理器用于检测到压力信号大于或等于压力阈值，采用关断信号配置开关信号，关断信号用于控制电源60控制开关断开；第二控制芯片504还用于：若检测到关断信号，并且母线信号未进入衰减状态，则确定开关信号与母线信号不匹配。
在该实施例中，由于继电器404存在触点粘连的风险，若继电器404闭合后粘连，则不再响应压力开关402的开关信号或控制模块50的控制信号，即在接收到关断信号后也不能有效断开，此时需要控制模块50直接控制压缩机10停止运行，若压力开关402检测到压力信号大于或等于压力阈值，即检测到过压，向继电器404发送关断信号，同时第二控制芯片504接收断电信号，此时第二控制芯片504主动检测驱动模块30的母线电压的变化情况，如果母线电压持续下降，表明继电器404正常断开，如果母线电压没有变化，则表明继电器404未正常断开，此时第二控制芯片504关断压缩机10驱动芯片302，即第一控制芯片502，第一控制芯片502关停止输出驱动模块30输出驱动控制信号。
其中，压力阈值可以为能够保证压缩机10正常运行的最大压力值。
控制模块50与驱动模块30以及压力开关模块40电连接，用于向驱动模块30输入驱动控制信号。
驱动模块30还用于：根据驱动控制信号控制压缩机10运行。
控制模块50还用于：检测到开关信号与驱动模块30的母线信号不匹配，控制压缩机10停止运行。
在控制压缩机10运行的过程中，压力开关模块40能够检测压缩机10的工况，并在检测到压缩机10运行异常时，控制供电回路20与驱动模块30断开，以停止向压缩机10供电，以使压缩机10停止运行。
为了防止压力开关模块40控制失效，增加控制模块50的诊断功能，通过检测开关信号的状态与驱动模块30的母线信号的状态是否匹配，在检测上述关系匹配时，表明压力开关模块40控制保持有效状态，在检测上述关系不匹配时，表明压力开关模块 40控制失效，此时控制压缩机10停止运行，进而防止压缩机10在压力开关模块40失效的工况下运行，降低异常运行概率，从而能够提升压缩机10运行的安全性与可靠性。
实施例二
在实施例一的基础上，对控制模块50进行进一步限定，控制模块50包括：单独设置的集成控制芯片，采用一个集成控制芯片有利于电路的简化设置。
具体地，通过设置集成控制芯片，不需要增加具有诊断功能的芯片，由集成控制芯片诊断开关信号(比如是否输入+12V电压)以及母线电压来进行判断。
实施例三
如图2所示，在实施例一的基础上，对控制模块50进行进一步限定，包括：第一控制芯片502，与驱动模块30电连接，用于向驱动模块30输出驱动控制信号；第二控制芯片504，与驱动模块30电连接，以获取母线信号；第二控制芯片504还连接至压力开关402与电源控制开关之间的连接点，以获取开关信号；第二控制芯片504还与第一控制芯片502电连接，以在检测到开关信号与母线信号不匹配，控制第一控制芯片502停止输出驱动控制信号，以使压缩机10停止运行。
在该实施例中，由于相关技术中的压力保护电路中已经设置有与第一控制芯片502相同功能的控制芯片，因此在相关技术的压力保护电路的基础上增加本申请限定的第二控制芯片504，在实现异常诊断检测与控制的同时，有利于降低制备成本。
另外，第二控制芯片504还可以直接控制驱动模块30，具体包括：驱动模块30包括驱动芯片302，驱动芯片302分别与第一控制芯片502与第二控制芯片504电连接，驱动芯片302用于解锁驱动控制信号；第二控制芯片504还用于：控制关闭驱动芯片302。
在该实施例中，还可以通过第二控制芯片504直接控制驱动模块30的驱动芯片302关闭，以保证控制压缩机10停止运行的可靠性，并且通过设置第二控制芯片504，在第一控制芯片502异常时依然能有效停止压缩机10，保证系统的安全性。
第二控制芯片504还用于：若检测到关断信号，并且母线信号进入衰减状态，则确定开关信号与母线信号匹配，以及微处理器还用于：采用闭合信号配置开关信号，闭合信号用于控制电源60控制开关闭合；第二控制芯片504还用于：若检测到闭合信号，并且母线信号进入增长状态，则确定开关信号与母线信号匹配。
在该实施例中，检测开关信号与驱动模块30的母线信号之间是否匹配，在限定出不匹配的工况下控制压缩机10停止运行时，匹配的工况对应于压缩机10正常运行的工况，从而保证压力保护控制的完整性。
具体地，通过增加具有诊断功能的第二控制芯片504，以采用第二控制芯片504在压力开关402动作时检测驱动模块30的母线电压值来判断继电器404触头是否有效断开，当检测到继电器404触头粘连时，第二控制芯片504会关断驱动模块30的第一控制芯片502，以是第一控制芯片502关断继电器404的控制信号以及压缩机10的驱动控制信号。
在上述实施例一与实施例二的基础上，压力保护电路还包括：控制电源60，用于向控制模块50供电；控制电源60还用于：向压力开关402供电，并使压力开关402根据控制电源60的供电信号与对压力信号的检测结果，生成对应的开关信号，以根据开关信号向电源控制开关输出供电信号，或停止输出供电信号。
在该实施例中，电源控制开关根据是否接收到控制电源60的供电信号来确定导通或断开，正常工况下，若停止接收供电信号，电源控制开关会自动断开，在异常工况下，比如出现上述的触点粘连，在触点接触导通并发生粘连后，即便供电信号停止，电源控制开关仍处于导通状态，这种情况下压缩机10存在运行压力继续增大的风险，通过控制压缩机10停止运行，以尽量规避该风险。
在上述任一项实施例中，驱动模块30包括智能功率模块和/或IGBT模组，智能功率模块和/或IGBT模组均设置有晶体管组件，第一控制芯片502还用于：将脉冲宽度调制信号配置为驱动控制信号，脉冲宽度调制信号用于控制晶体管组件通断。
在该实施例中，驱动模块30可以包括整流器、PFC模块、与IPM(智能功率模块)模块等，也可以只包括IPM模块，通过向驱动模块30输出驱动控制信号，在供电回路20导通的同时，实现对压缩机10的电机的驱动控制，因此能够通过停止输出驱动控制信号，控制压缩机10的电机停止运行，以保证压缩机10运行的可控性。
实施例四
在限定了压力保护电路的基础上，对压缩机的压力保护控制方法进行进一步描述，图3示出了根据申请的一个实施例的压力保护控制方法，包括：
步骤602，检测到驱动模块的母线信号与压力开关模块的工作状态不匹配，控制压缩机停止运行。
在该实施例中，压在控制压缩机运行的过程中，压力开关模块能够检测压缩机的工况，并在检测到压缩机运行异常时，控制供电回路与驱动模块断开，以停止向压缩机供电，以使压缩机停止运行。
为了防止压力开关模块控制失效，增加诊断功能，通过检测开关信号的状态与驱动模块的母线信号的状态是否匹配，在检测上述关系匹配时，表明压力开关模块控制保持有效状态，在检测上述关系不匹配时，表明压力开关模块控制失效，此时控制压 缩机停止运行，进而防止压缩机在压力开关模块失效的工况下运行，降低异常运行概率，从而能够提升压缩机运行的安全性与可靠性。
在上述任一项实施例中，控制压缩机停止运行，具体包括：控制停止向驱动模块输出驱动控制信号和/或控制关闭驱动模块的驱动芯片，其中，驱动模块包括智能功率模块和/或IGBT模组，智能功率模块和/或IGBT模组均设置有晶体管组件，将脉冲宽度调制信号配置为驱动控制信号，脉冲宽度调制信号用于控制晶体管组件通断。
在该实施例中，驱动模块可以包括整流器、PFC模块、与IPM(智能功率模块)模块等，也可以只包括IPM模块，通过向驱动模块输出驱动控制信号，在供电回路导通的同时，实现对压缩机的电机的驱动控制，因此能够通过停止输出驱动控制信号，控制压缩机的电机停止运行，以保证压缩机运行的可控性。
实施例五
基于对压力容器的压力信号的检测，确定驱动模块的母线信号与压力开关模块的工作状态不匹配，控制压缩机停止运行，具体包括：响应于获取到的压力开关模块输出的关断信号，检测母线信号；若检测到母线信号在指定时长内未下降至电压阈值，确定工作状态不匹配，以控制压缩机停止运行，其中，关断信号在压力开关模块检测到压力容器的压力信号大于或等于压力阈值时生成。
在该实施例中，以继电器为例，若检测到过压，则触发检测驱动模块的母线电压的变化情况，如果母线电压持续下降，表明继电器正常断开，如果母线电压没有变化，则表明继电器未正常断开，此时控制停止输出驱动控制信号，以防止继电器失效，增加上述的控制模块的诊断功能，以在电源控制开关失效时及时采取补救措施，以降低失效运行风险。
实施例六
还可以在开机阶段，通过调整控制程序，检测驱动模块的母线信号与压力开关模块的工作状态是否匹配，具体包括：响应于开机信号，在压力开关模块运行之前，控制驱动模块输出驱动驱动控制信号；若检测到母线信号处于增长状态，确定工作状态不匹配，并控制压缩机停止运行。
在该实施例中，还可以在控制压缩机开始运行阶段，检测驱动模块的母线信号与压力开关模块的工作状态是否匹配，比如开机后压力开关还未向继电器输出闭合的开关信号，已经检测到了驱动模块的母线电压达到了较大的电压值，则也可以认为继电器工作异常，从而控制压缩机停止继续运行，以保证压缩机运行的安全性。
在上述实施例三至实施例五的基础上，对本申请中的压力保护控制方法的进一步补充，还包括：压力开关模块包括设置于驱动模块与供电回路之间的继电器，压力保 护控制方法还包括：若检测到母线信号与工作状态不匹配，则确定继电器异常，并生成异常报警信息。
在该实施例中，在检测到继电器异常时，向用户传递异常报警信息，以引导用户及时解决异常。
实施例七
基于上述实施例一至实施例三中的压力保护电路，图4示出了根据申请的另一个实施例的压力保护控制方法，包括：
步骤S702，第二控制芯片正常运行。
步骤S704，检测是否向继电器输出供电信号，若“是”，执行步骤S712，若“否”，则执行步骤S706。
步骤S706，检测到母线信号在指定时长内是否下降至电压阈值，若“是”，执行步骤S710，若“否”，则执行步骤S708。
步骤S708，判定判断继电器触点粘连，关断压缩机的驱动芯片，同时控制第一控制芯片停止输出继电器控制信号与驱动控制信号。
步骤S710，压缩机停止运行。
步骤S712，压缩机正常运行。
具体地，在空调系统中设置有压缩机，压缩机包括压力容器，压缩机工作时使压力容器中的压力会发生变化，压力保护电路通过压力开关断开时，断开继电器的供电信号，使继电器的触头断开，进而使压缩机驱动模块功率部分的电源断开，使压缩机停止。
第二控制芯片在压力开关装置动作之后，检测到继电器的供电信号+12V断开，此时检测驱动模块中的母线电压Vdc，若继电器触头正常断开，则Vdc会持续下降，若继电器触头发生粘连，则Vdv电压保持当前状态。当第二控制芯片检测到Vdc电压在设定时间内未降至设定电压值，则关断压缩机的驱动芯片，使压缩机停止。
在第二控制芯片检测到到继电器粘连的时候，同时通知第一控制芯片关断压缩机驱动信号以及继电器控制信号。
在检测到过压力保护电路正产工作时，即Vdc电压有效降低，则第二控制芯片正常运行，不进行其他动作。
当发生过压力，且发生继电器触头粘连，压力保护电路失效的情况下，通过控制模块检测到继电器粘连，关断压缩机的驱动芯片，停止压缩机，同时让第一控制芯片关断驱动信号以及继电器控制信号，使系统进入的安全状态，保证系统的安全性以及可靠性。
如图5所示，本申请的实施例还提供了一种计算机可读存储介质800，该计算机可读存储介质800中存储有计算机程序802，计算机程序802被处理器执行时实现上述任一实施例公开的烹饪控制方法的步骤，故而具有上述任一实施例的烹饪控制方法的技术效果，在此不再赘述。
在该实施例中，计算机程序802被处理器执行时实现以下步骤：
检测到驱动模块的母线信号与压力开关模块的工作状态不匹配，控制压缩机停止运行。
在该实施例中，压在控制压缩机运行的过程中，压力开关模块能够检测压缩机的工况，并在检测到压缩机运行异常时，控制供电回路与驱动模块断开，以停止向压缩机供电，以使压缩机停止运行。
为了防止压力开关模块控制失效，增加诊断功能，通过检测开关信号的状态与驱动模块的母线信号的状态是否匹配，在检测上述关系匹配时，表明压力开关模块控制保持有效状态，在检测上述关系不匹配时，表明压力开关模块控制失效，此时控制压缩机停止运行，进而防止压缩机在压力开关模块失效的工况下运行，降低异常运行概率，从而能够提升压缩机运行的安全性与可靠性。
在上述实施例中，压缩机包括压力容器，检测到驱动模块的母线信号与压力开关模块的工作状态不匹配，控制压缩机停止运行，具体包括：响应于获取到的压力开关模块输出的关断信号，检测母线信号；若检测到母线信号在指定时长内未下降至电压阈值，确定工作状态不匹配，以控制压缩机停止运行，其中，关断信号在压力开关模块检测到压力容器的压力信号大于或等于压力阈值时生成。
在该实施例中，以继电器为例，若检测到过压，则触发检测驱动模块的母线电压的变化情况，如果母线电压持续下降，表明继电器正常断开，如果母线电压没有变化，则表明继电器未正常断开，此时控制停止输出驱动控制信号，以防止继电器失效，增加上述的控制模块的诊断功能，以在电源控制开关失效时及时采取补救措施，以降低失效运行风险。
在上述任一项实施例中，检测到驱动模块的母线信号与压力开关模块的工作状态不匹配，控制压缩机停止运行，具体包括：响应于开机信号，在压力开关模块运行之前，控制驱动模块输出驱动驱动控制信号；若检测到母线信号处于增长状态，确定工作状态不匹配，并控制压缩机停止运行。
在该实施例中，还可以在控制压缩机开始运行阶段，检测驱动模块的母线信号与压力开关模块的工作状态是否匹配，比如开机后压力开关还未向继电器输出闭合的开关信号，已经检测到了驱动模块的母线电压达到了较大的电压值，则也可以认为继电 器工作异常，从而控制压缩机停止继续运行，以保证压缩机运行的安全性。
在上述任一项实施例中，控制压缩机停止运行，具体包括：控制停止向驱动模块输出驱动控制信号，其中，驱动模块包括智能功率模块和/或IGBT模组，智能功率模块和/或IGBT模组均设置有晶体管组件，将脉冲宽度调制信号配置为驱动控制信号，脉冲宽度调制信号用于控制晶体管组件通断。
在该实施例中，驱动模块可以包括整流器、PFC模块、与IPM(智能功率模块)模块等，也可以只包括IPM模块，通过向驱动模块输出驱动控制信号，在供电回路导通的同时，实现对压缩机的电机的驱动控制，因此能够通过停止输出驱动控制信号，控制压缩机的电机停止运行，以保证压缩机运行的可控性。
在上述任一项实施例中，压力开关模块包括设置于驱动模块与供电回路之间的继电器，压力保护控制方法还包括：若检测到母线信号与工作状态不匹配，则确定继电器异常，并生成异常报警信息。在检测到继电器异常时，向用户传递异常报警信息，以引导用户及时解决异常。
在本申请中，术语“第一”、“第二”、“第三”仅用于描述的目的，而不能理解为指示或暗示相对重要性；术语“多个”则指两个或两个以上，除非另有明确的限定。术语“安装”、“相连”、“连接”、“固定”等术语均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接；“相连”可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请的描述中，需要理解的是，术语“上”、“下”、“左”、“右”、“前”、“后”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或单元必须具有特定的方向、以特定的方位构造和操作，因此，不能理解为对本申请的限制。
在本说明书的描述中，术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或实例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (15)

  1. 一种压力保护电路，其特征在于，适用于压缩机，包括：
    驱动模块，与所述压缩机电连接；
    压力开关模块，设置于所述驱动模块与所述压缩机的供电回路之间，用于输出开关信号，所述开关信号用于控制所述供电回路与所述驱动模块导通或断开；
    控制模块，与所述驱动模块以及所述压力开关模块电连接，用于向所述驱动模块输入驱动控制信号，以使驱动模块根据所述驱动控制信号控制所述压缩机运行；
    所述控制模块还用于：检测到所述开关信号与所述驱动模块的母线信号不匹配，控制所述压缩机停止运行。
  2. 根据权利要求1所述的压力保护电路，其特征在于，所述压缩机包括压力容器，所述压力开关模块包括：
    压力开关，用于检测所述压力容器的压力信号，并根据所述压力信号生成对应的所述开关信号；
    电源控制开关，设置于所述驱动模块与所述供电回路之间，并与所述压力开关电连接，所述电源控制开关用于根据所述开关信号闭合使所述供电回路与所述驱动模块导通，或根据所述开关信号断开使所述供电回路与所述驱动模块断开。
  3. 根据权利要求2所述的压力保护电路，其特征在于，
    所述电源控制开关包括继电器、接触器与半导体功率开关中的任意一种。
  4. 根据权利要求2所述的压力保护电路，其特征在于，
    所述控制模块包括：单独设置的集成控制芯片；或
    所述控制模块包括第一控制芯片与第二控制芯片，
    其中，所述第一控制芯片与所述驱动模块电连接，用于向所述驱动模块输出所述驱动控制信号，所述第二控制芯片，与所述驱动模块电连接，以获取所述母线信号，所述第二控制芯片还连接至所述压力开关与所述电源控制开关之间的连接点，以获取所述开关信号，所述第二控制芯片还与所述第一控制芯片电连接，以在检测到所述开关信号与所述母线信号不匹配，控制所述第一控制芯片停止输出所述驱动控制信号，以使所述压缩机停止运行。
  5. 根据权利要求4所述的压力保护电路，其特征在于，所述驱动模块包括驱动芯片，所述驱动芯片分别与所述第一控制芯片与所述第二控制芯片电连接，所述驱动芯片用于解锁所述驱动控制信号；
    所述第二控制芯片还用于：控制关闭所述驱动芯片。
  6. 根据权利要求4所述的压力保护电路，其特征在于，所述压力开关设置于所述压力容器的出口，所述压力开关还包括：
    压力传感器，用于检测所述压力信号；
    微处理器，与所述压力传感器电连接，所述微处理器用于检测到所述压力信号大于或等于压力阈值，采用关断信号配置所述开关信号，所述关断信号用于控制所述电源控制开关断开；
    所述第二控制芯片还用于：若检测到所述关断信号，并且所述母线信号未进入衰减状态，则确定所述开关信号与所述母线信号不匹配。
  7. 根据权利要求6所述的压力保护电路，其特征在于，
    所述第二控制芯片还用于：若检测到所述关断信号，并且所述母线信号进入衰减状态，则确定所述开关信号与所述母线信号匹配，以及
    所述微处理器还用于：采用闭合信号配置所述开关信号，所述闭合信号用于控制所述电源控制开关闭合；
    所述第二控制芯片还用于：若检测到所述闭合信号，并且所述母线信号进入增长状态，则确定所述开关信号与所述母线信号匹配。
  8. 根据权利要求2至7中任一项所述的压力保护电路，其特征在于，还包括：
    控制电源，用于向所述控制模块供电；
    所述控制电源还用于：向所述压力开关供电，并使所述压力开关根据所述控制电源的供电信号与对所述压力信号的检测结果，生成对应的所述开关信号，以根据所述开关信号向所述电源控制开关输出供电信号，或停止输出所述供电信号。
  9. 根据权利要求4所述的压力保护电路，其特征在于，所述驱动模块包括智能功率模块和/或IGBT模组，所述智能功率模块和/或IGBT模组均设置有晶体管组件，
    所述第一控制芯片还用于：将脉冲宽度调制信号配置为所述驱动控制信号，所述脉冲宽度调制信号用于控制所述晶体管组件通断。
  10. 一种压力保护控制方法，其特征在于，适用于压缩机的压力保护电路，所述压力保护电路包括压力开关模块与驱动模块，所述压力开关模块被配置为控制所述压缩机的供电回路与所述驱动模块导通或断开，所述压力保护控制方法包括：
    检测到所述驱动模块的母线信号与所述压力开关模块的工作状态不匹配，控制所述压缩机停止运行。
  11. 根据权利要求10所述的压力保护控制方法，其特征在于，所述压缩机包括压力容器，所述检测到所述驱动模块的母线信号与所述压力开关模块的工作状态不匹配，控制所述压缩机停止运行，具体包括：
    响应于获取到的所述压力开关模块输出的关断信号，检测所述母线信号；
    若检测到所述母线信号在指定时长内未下降至电压阈值，确定所述工作状态不匹配，以控制所述压缩机停止运行，
    其中，所述关断信号在所述压力开关模块检测到所述压力容器的压力信号大于或等于压力阈值时生成。
  12. 根据权利要求10所述的压力保护控制方法，其特征在于，所述检测到所述驱动模块的母线信号与所述压力开关模块的工作状态不匹配，控制所述压缩机停止运行，具体包括：
    响应于开机信号，在所述压力开关模块运行之前，控制所述驱动模块输出驱动驱动控制信号；
    若检测到所述母线信号处于增长状态，确定所述工作状态不匹配，并控制所述压缩机停止运行。
  13. 根据权利要求10或11所述的压力保护控制方法，其特征在于，所述控制所述压缩机停止运行，具体包括：
    控制停止向所述驱动模块输出驱动控制信号，和/或
    控制关闭所述驱动模块的驱动芯片，
    其中，所述还驱动模块包括智能功率模块和/或IGBT模组，所述智能功率模块和/或IGBT模组均设置有晶体管组件，将脉冲宽度调制信号配置为所述驱动控制信号，所述脉冲宽度调制信号用于控制所述晶体管组件通断。
  14. 根据权利要求10至12中任一项所述的压力保护控制方法，其特征在于，所述压力开关模块包括设置于所述驱动模块与所述供电回路之间的继电器，所述压力保护控制方法还包括：
    若检测到所述母线信号与所述工作状态不匹配，则确定所述继电器异常，并生成异常报警信息。
  15. 一种计算机可读存储介质，其上存储有运行验证程序，其特征在于，该运行验证程序被处理器执行时实现权利要求10至14中任一项所述的压力保护控制方法。
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