WO2020024695A1 - 空调器的控制方法、控制装置及空调器 - Google Patents

空调器的控制方法、控制装置及空调器 Download PDF

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Publication number
WO2020024695A1
WO2020024695A1 PCT/CN2019/089860 CN2019089860W WO2020024695A1 WO 2020024695 A1 WO2020024695 A1 WO 2020024695A1 CN 2019089860 W CN2019089860 W CN 2019089860W WO 2020024695 A1 WO2020024695 A1 WO 2020024695A1
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Prior art keywords
air conditioner
protection
expansion valve
low
electronic expansion
Prior art date
Application number
PCT/CN2019/089860
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English (en)
French (fr)
Inventor
任林行
许永锋
马熙华
Original Assignee
合肥美的暖通设备有限公司
广东美的暖通设备有限公司
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Application filed by 合肥美的暖通设备有限公司, 广东美的暖通设备有限公司 filed Critical 合肥美的暖通设备有限公司
Priority to US16/618,570 priority Critical patent/US11168913B2/en
Publication of WO2020024695A1 publication Critical patent/WO2020024695A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/48—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring prior to normal operation, e.g. pre-heating or pre-cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/0205—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric not using a model or a simulator of the controlled system
    • G05B13/021—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric not using a model or a simulator of the controlled system in which a variable is automatically adjusted to optimise the performance
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B15/00—Systems controlled by a computer
    • G05B15/02—Systems controlled by a computer electric
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/26—Pc applications
    • G05B2219/2614—HVAC, heating, ventillation, climate control

Definitions

  • the present application relates to the technical field of air conditioning control, and in particular, to a method for controlling an air conditioner, a control device for an air conditioner, and an air conditioner.
  • multi-connected air-conditioning systems generally match the operation of multiple indoor units.
  • the opening degree of the electronic expansion valve of the internal unit is sometimes closed. Too small, causing the low voltage to be too low and causing the outdoor unit to falsely trigger the low-voltage protection, which causes the fault to stop. After the fault is automatically restored, the air-conditioning system will run again, and the low-voltage protection will occur again for the same reason, causing the air-conditioning system to start and stop frequently.
  • the air-conditioning system works in a low-temperature cooling mode, the number of the above-mentioned accidental shutdown phenomenon is particularly frequent, which seriously affects the reliability of the air-conditioning system and the comfort of the user in using the air-conditioning.
  • This application is intended to solve at least one of the technical problems in the related technology.
  • the present application proposes a method for controlling an air conditioner, which can effectively improve the reliability of the air conditioner and improve the comfort of the user in using the air conditioner.
  • the application also proposes a control device for an air conditioner and an air conditioner.
  • the air conditioner includes at least one indoor unit and one outdoor unit.
  • the control method includes: when a boot capacity of the indoor unit is less than or equal to a capacity threshold, When the low-pressure protection signal is received, the opening degree of the electronic expansion valve is adjusted.
  • the startup capacity of the indoor unit of the air conditioner is less than or equal to the capacity threshold, which indicates that the air conditioner has a small working load, and at this time, the opening degree of the electronic expansion valve is small.
  • the start-up capacity of the indoor unit of the air conditioner is less than or equal to the capacity threshold, and the low-voltage protection signal of the outdoor unit of the air-conditioner is received, the low-voltage protection signal is a fault caused by the small operating load of the air conditioner and the low opening of the electronic expansion valve. The possibility of alarming is high.
  • the air conditioner instead of controlling the air conditioner to stop and troubleshoot, but to adjust the opening degree of the electronic expansion valve, if it is a false alarm caused by the small operating load of the air conditioner and the low opening degree of the electronic expansion valve, in After the opening of the electronic expansion valve is adjusted, the refrigerant further fills the pipeline. At this time, the low pressure of the outdoor unit rises above the low pressure protection threshold, the low pressure fault is eliminated, the outdoor unit no longer sends a low pressure protection signal, and the air conditioner can resume normal operation.
  • the technical solution provided by the present application when the indoor unit is turned on with a small capacity, the shutdown of the air conditioner due to the false alarm of the low-pressure protection signal caused by the small operating load of the air conditioner and the low opening degree of the electronic expansion valve can be avoided, and the air conditioner can be avoided. Frequent accidental shutdowns caused when the indoor unit has a small startup capacity can effectively improve the reliability of the air conditioner and further improve the user's comfort in using the air conditioner.
  • the air conditioner when the air conditioner is turned on, it is determined whether the startup capacity of the indoor unit of the air conditioner is less than or equal to the capacity threshold. If the startup capacity of the indoor unit is less than or equal to the capacity threshold, when receiving the low-voltage protection signal of the outdoor unit, control is performed.
  • the electronic expansion valves of indoor and outdoor units both increase the opening degree, increase the operating load of the air conditioner, and increase the amount of refrigerant passing through the electronic expansion valve. After the refrigerant is further filled in the pipeline, the low-voltage fault of the outdoor unit is eliminated, and the outdoor unit no longer sends a low-voltage protection signal. At this time, the air conditioner is controlled to resume normal operation, which avoids frequent shutdown of the air conditioner due to false alarms of the low-voltage protection signal. The reliability of the air conditioner and the comfort of the user in using the air conditioner.
  • the air conditioner control method in the above technical solution provided in the present application may also have the following additional technical features:
  • the method for controlling the air conditioner further includes: starting the timing after adjusting the opening degree of the electronic expansion valve; and when the timing reaches the first preset duration, if the low-pressure protection signal is still received, then continuing Timing; otherwise, control the first protection cumulative value plus 1, and control the air conditioner to continue running.
  • the timer is started after the opening degree of the electronic expansion valve is adjusted, and the judgment is made after the timing reaches the first preset duration.
  • the method further includes: when the timing reaches a second preset duration, if the low-voltage protection signal is still received, controlling the air conditioner to stop running and sending a prompt message; Otherwise, the cumulative value of the second protection is increased by 1 and the air conditioner is controlled to continue to run.
  • the opening degree of the electronic expansion valve is adjusted and the timing reaches the first preset duration, but the low-pressure fault of the outdoor unit is not eliminated
  • the timing continues and reaches the second preset duration
  • the low-pressure fault of the outdoor unit is judged again. Whether to exclude it. If a low-voltage protection signal is still received at this time, it indicates that the low-voltage fault is not a false alarm caused by the small capacity of the indoor unit. Therefore, the air conditioner needs to be controlled to stop running and issue a prompt message to remind the user that the air conditioner is malfunctioning.
  • the fault cannot be eliminated automatically, so that the user can contact the maintenance personnel for on-site repair as soon as possible; if the timer reaches the second preset time, the low-voltage fault of the outdoor unit has been eliminated and no low-voltage protection signal is received, indicating that the air conditioner is ready for use at this time. Normal operation is resumed. At this time, the second protection cumulative value is increased by 1, the number of times that the fault returns to normal after the second preset time period is recorded, and the air conditioner is controlled to continue running.
  • step of timing further comprises: reducing the operating frequency of the outdoor unit.
  • the higher the operating frequency of the outdoor unit of the air conditioner the higher the corresponding pressure value in the normal pipe.
  • the low frequency failure is not eliminated, and the operating frequency of the outdoor unit is further reduced. It can make the low-voltage fault recover more quickly and make the air conditioner return to normal work faster.
  • the step of adjusting the opening degree of the electronic expansion valve also includes: clearing the correction amount of the indoor unit; while controlling the step of continuing the operation of the air conditioner, it further includes: restoring the indoor unit The amount of correction.
  • the method further includes: continuously acquiring the first protection cumulative value and the second protection cumulative value within a third preset time period; When the accumulated value reaches the first protection threshold and / or the second protection accumulated value reaches the second protection threshold, the air conditioner is controlled to stop running and issue a prompt message.
  • the first protection cumulative value and the second protection cumulative value are continuously acquired within a third preset time period, the first protection cumulative value reaches the first protection threshold, and / or the second protection cumulative value reaches the second
  • the protection threshold value indicates that the air conditioner has too many low-voltage faults in a short period of time
  • the low-voltage protection signal is not a false alarm due to a small amount of indoor unit startup. Therefore, the air conditioner is controlled to stop running and send a fault prompt message to the user to prompt the user
  • the air conditioner is faulty, and the fault cannot be eliminated automatically, so that the user can contact the maintenance personnel to repair it at the first time.
  • the step of adjusting the opening degree of the electronic expansion valve is specifically: adjusting the opening of the electronic expansion valve to the initial opening degree; or adjusting the opening of the electronic expansion valve to the maximum opening degree; or adjusting the electronic expansion valve Increase the preset opening.
  • the step of adjusting the opening degree of the electronic expansion valve is specifically adjusting the opening of the electronic expansion valve to the initial opening degree so that the air conditioner operates in the initial state; or the step of adjusting the opening degree of the electronic expansion valve is specifically adjusting the electronic The expansion valve is opened to the maximum opening degree, so that the low-pressure fault can be eliminated at the fastest speed; or the step of adjusting the opening degree of the electronic expansion valve is specifically to adjust the electronic expansion valve to increase the preset opening degree, so that the low-pressure fault is automatically eliminated according to the preset steps. .
  • the air conditioner includes at least one indoor unit and one outdoor unit.
  • the control device includes: a memory and a processor; the memory is configured to store a computer program; The processor is configured to execute a computer program to adjust the opening degree of the electronic expansion valve when the indoor unit's startup capacity is less than or equal to the capacity threshold and a low-pressure protection signal is received.
  • the startup capacity of the indoor unit of the air conditioner is less than or equal to the capacity threshold, which indicates that the air conditioner has a small working load, and at this time, the opening degree of the electronic expansion valve is small.
  • the start-up capacity of the indoor unit of the air conditioner is less than or equal to the capacity threshold, and a low-voltage protection signal is received from the outdoor unit of the air-conditioner, the low-voltage protection signal is an error caused by the small operating load of the air conditioner and the low opening of the electronic expansion valve. The possibility of alarming is high.
  • the air conditioner instead of controlling the air conditioner to stop and troubleshoot, but to adjust the opening degree of the electronic expansion valve, if it is a false alarm caused by the small operating load of the air conditioner and the low opening degree of the electronic expansion valve, in After the opening of the electronic expansion valve is adjusted, the refrigerant further fills the pipeline. At this time, the low pressure of the outdoor unit rises above the low pressure protection threshold, the low pressure fault is eliminated, the outdoor unit no longer sends a low pressure protection signal, and the air conditioner can resume normal operation.
  • the processor is further configured to: after adjusting the opening degree of the electronic expansion valve, start timing; when the timing reaches the first preset duration, if the low-pressure protection signal is still received, continue timing; Otherwise, control the first protection cumulative value to increase by 1 and control the air conditioner to continue to run.
  • the timer is started after the opening degree of the electronic expansion valve is adjusted, and the judgment is made after the timing reaches the first preset duration.
  • the processor is further configured to: when the timing reaches the second preset duration, if the low-voltage protection signal is still received, control the air conditioner to stop running and issue a prompt message; otherwise, control the second Increase the protection cumulative value by 1 and control the air conditioner to continue running.
  • the opening degree of the electronic expansion valve is adjusted and the timing reaches the first preset duration, but the low-pressure fault of the outdoor unit is not eliminated
  • the timing continues and reaches the second preset duration
  • the low-pressure fault of the outdoor unit is judged again. Whether to exclude it. If a low-voltage protection signal is still received at this time, it indicates that the low-voltage fault is not a false alarm caused by the small capacity of the indoor unit. Therefore, the air conditioner needs to be controlled to stop running and issue a prompt message to remind the user that the air conditioner is malfunctioning.
  • the fault cannot be eliminated automatically, so that the user can contact the maintenance personnel for on-site repair as soon as possible; if the timer reaches the second preset time, the low-voltage fault of the outdoor unit has been eliminated and no low-voltage protection signal is received, indicating that the air conditioner is ready for use at this time. Normal operation is resumed. At this time, the second protection cumulative value is increased by 1, the number of times that the fault returns to normal after the second preset time period is recorded, and the air conditioner is controlled to continue running.
  • the processor is further configured to reduce the operating frequency of the outdoor unit.
  • the higher the operating frequency of the outdoor unit of the air conditioner the higher the corresponding pressure value in the normal pipe.
  • the low frequency failure is not eliminated, and the operating frequency of the outdoor unit is further reduced. It can make the low-voltage fault recover more quickly and make the air conditioner return to normal work faster.
  • the processor is further configured to: while adjusting the opening degree of the electronic expansion valve, clear the correction amount of the indoor unit; while controlling the steps of the air conditioner to continue running, restore the indoor unit The amount of correction.
  • the processor is further configured to: continuously acquire the first protection cumulative value and the second protection cumulative value within a third preset time period; and when the first protection cumulative value reaches the first protection threshold value , And / or when the cumulative value of the second protection reaches the second protection threshold, control the air conditioner to stop running and issue a prompt message.
  • the first protection cumulative value and the second protection cumulative value are continuously acquired within a third preset time period, the first protection cumulative value reaches the first protection threshold, and / or the second protection cumulative value reaches the second
  • the protection threshold value indicates that the air conditioner has too many low-voltage faults in a short period of time
  • the low-voltage protection signal is not a false alarm due to a small amount of indoor unit startup. Therefore, the air conditioner is controlled to stop running and send a fault prompt message to the user to prompt the user
  • the air conditioner is faulty, and the fault cannot be eliminated automatically, so that the user can contact the maintenance personnel to repair it at the first time.
  • the processor is further configured to: adjust the opening of the electronic expansion valve to the initial opening degree; or adjust the opening of the electronic expansion valve to the maximum opening degree; or adjust the electronic expansion valve to increase the preset opening degree.
  • the step of adjusting the opening degree of the electronic expansion valve is specifically adjusting the opening of the electronic expansion valve to the initial opening degree so that the air conditioner operates in the initial state; or the step of adjusting the opening degree of the electronic expansion valve is specifically adjusting the electronic The expansion valve is opened to the maximum opening degree, so that the low-pressure fault can be eliminated at the fastest speed; or the step of adjusting the opening degree of the electronic expansion valve is specifically to adjust the electronic expansion valve to increase the preset opening degree, so that the low-pressure fault is automatically eliminated according to the preset steps. .
  • a third aspect of the present application provides an air conditioner including the control device for an air conditioner described in any one of the foregoing technical solutions. Therefore, the air conditioner includes the control of the air conditioner described in any one of the foregoing technical solutions. All the benefits of the device.
  • FIG. 1 shows a flowchart of a method for controlling an air conditioner according to an embodiment of the present application
  • FIG. 2 shows a flowchart of a method for controlling an air conditioner according to another embodiment of the present application
  • FIG. 3 shows a flowchart of a method for controlling an air conditioner according to still another embodiment of the present application
  • FIG. 4 shows a flowchart of a method for controlling an air conditioner according to another embodiment of the present application
  • FIG. 5 shows a flowchart of a method for controlling an air conditioner according to another embodiment of the present application.
  • FIG. 6 shows a flowchart of a method for controlling an air conditioner according to another embodiment of the present application.
  • FIG. 7 shows a flowchart of a method for controlling an air conditioner according to another embodiment of the present application.
  • FIG. 8 shows a flowchart of a method for controlling an air conditioner according to another embodiment of the present application.
  • FIG. 9 shows a block diagram of a control device for an air conditioner according to an embodiment of the present application.
  • a method for controlling an air conditioner includes at least one indoor unit and one outdoor unit.
  • the control method includes:
  • the startup capacity of the indoor unit of the air conditioner is less than or equal to the capacity threshold, which indicates that the air conditioner has a small working load, and the opening degree of the electronic expansion valve is small at this time.
  • the start-up capacity of the indoor unit of the air conditioner is less than or equal to the capacity threshold, and the low-voltage protection signal of the outdoor unit of the air-conditioner is received, the low-voltage protection signal is a fault caused by the small operating load of the air conditioner and the low opening of the electronic expansion valve. The possibility of alarming is high.
  • the air conditioner instead of controlling the air conditioner to stop and troubleshoot, but to adjust the opening degree of the electronic expansion valve, if it is a false alarm caused by the small operating load of the air conditioner and the low opening degree of the electronic expansion valve, in After the opening of the electronic expansion valve is adjusted, the refrigerant further fills the pipeline. At this time, the low pressure of the outdoor unit rises above the low pressure protection threshold, the low pressure fault is eliminated, the outdoor unit no longer sends a low pressure protection signal, and the air conditioner can resume normal operation.
  • the air conditioner when the air conditioner is turned on, it is determined whether the startup capacity of the indoor unit of the air conditioner is less than or equal to the capacity threshold. If the startup capacity of the indoor unit is less than or equal to the capacity threshold, when receiving the low-voltage protection signal of the outdoor unit, control is performed.
  • the electronic expansion valves of indoor and outdoor units both increase the opening degree, increase the operating load of the air conditioner, and increase the amount of refrigerant passing through the electronic expansion valve. After the refrigerant is further filled in the pipeline, the low-voltage fault of the outdoor unit is eliminated, and the outdoor unit no longer sends a low-voltage protection signal. At this time, the air conditioner is controlled to resume normal operation, which avoids frequent shutdown of the air conditioner due to false alarms of the low-voltage protection signal. The reliability of the air conditioner and the comfort of the user in using the air conditioner.
  • control method of the air conditioner includes:
  • the timer is started after the opening degree of the electronic expansion valve is adjusted, and judged after the timing reaches the first preset time period Whether the low-voltage fault of the outdoor unit is eliminated; if the low-voltage fault of the outdoor unit is not eliminated, that is, the low-voltage protection signal is still received, continue counting and wait for the refrigerant to further enter the pipeline; if the low-voltage fault of the outdoor unit has been eliminated, no low voltage is received anymore
  • the protection signal indicates that the air conditioner can resume normal operation at this time. At this time, the first protection cumulative value is increased by 1, the number of times that the fault returns to normal after the first preset time is recorded, and the air conditioner is controlled to continue running.
  • control method of the air conditioner includes:
  • the opening degree of the electronic expansion valve is adjusted and the timing reaches the first preset duration, but the low-pressure fault of the outdoor unit is not eliminated
  • the timing continues and reaches the second preset duration
  • the low-pressure fault of the outdoor unit is judged again. Whether to exclude it. If a low-voltage protection signal is still received at this time, it indicates that the low-voltage fault is not a false alarm caused by the small capacity of the indoor unit. Therefore, the air conditioner needs to be controlled to stop running and issue a prompt message to remind the user that the air conditioner is malfunctioning.
  • the fault cannot be eliminated automatically, so that the user can contact the maintenance personnel for on-site repair as soon as possible; if the timer reaches the second preset time, the low-voltage fault of the outdoor unit has been eliminated and no low-voltage protection signal is received, indicating that the air conditioner is ready for use at this time. Normal operation is resumed. At this time, the second protection cumulative value is increased by 1, the number of times that the fault returns to normal after a second preset time period is recorded, and the air conditioner is controlled to continue running.
  • control method of the air conditioner includes:
  • S416 Control the cumulative value of the second protection to increase by 1 and control the air conditioner to continue running.
  • the higher the operating frequency of the outdoor unit of the air conditioner the higher the corresponding pressure value in the normal pipe.
  • the low frequency failure is not eliminated, and the operating frequency of the outdoor unit is further reduced. It can make the low-voltage fault recover more quickly and make the air conditioner return to normal work faster.
  • control method of the air conditioner includes:
  • control method of the air conditioner includes:
  • the first protection cumulative value and the second protection cumulative value are continuously acquired within a third preset time period, the first protection cumulative value reaches the first protection threshold, and / or the second protection cumulative value reaches the second
  • the protection threshold value indicates that the air conditioner has too many low-voltage faults in a short period of time
  • the low-voltage protection signal is not a false alarm due to a small amount of indoor unit startup. Therefore, the air conditioner is controlled to stop running and send a fault prompt message to the user to prompt the user
  • the air conditioner is faulty, and the fault cannot be eliminated automatically, so that the user can contact the maintenance personnel to repair it at the first time.
  • the first protection threshold is set to 3 and the second protection threshold is set to 2.
  • the cumulative value of the first protection is greater than or equal to 3 and / or the second protection threshold is greater than or equal to 2
  • the air conditioner low-voltage protection is stopped, and It cannot be restored automatically.
  • the step of adjusting the opening degree of the electronic expansion valve is specifically: adjusting the opening of the electronic expansion valve to the initial opening degree; or adjusting the opening of the electronic expansion valve to the maximum opening degree; or adjusting the electronic expansion The valve increases the preset opening.
  • the step of adjusting the opening degree of the electronic expansion valve is specifically adjusting the opening of the electronic expansion valve to the initial opening degree so that the air conditioner operates in the initial state; or the step of adjusting the opening degree of the electronic expansion valve is specifically adjusting the electronic The expansion valve is opened to the maximum opening degree, so that the low-pressure fault can be eliminated at the fastest speed; or the step of adjusting the opening degree of the electronic expansion valve is specifically to adjust the electronic expansion valve to increase the preset opening degree, so that the low-pressure fault is automatically eliminated according to the preset steps. .
  • control method of the air conditioner includes:
  • the power-on capacity of the indoor unit is less than the capacity threshold.
  • S704. Determine whether the outdoor unit is under-voltage protected. If yes, go to S706. If no, go back to S704.
  • S706 Adjust the opening degree of the electronic expansion valve of the indoor unit and the outdoor unit to the initial opening degree, and clear the current correction amount of the indoor unit;
  • S710 Control the air conditioner to continue to operate and restore the indoor unit correction amount, and at the same time, the first protection cumulative value is increased by 1;
  • the opening degrees of the electronic expansion valves of the indoor unit and the outdoor unit are adjusted to the initial opening. Degrees, and clear the correction amount of the current indoor unit. Turn on the timing. When the timing reaches the first preset time, judge again whether the low-voltage protection signal is detected. When the judgment result is no, control the air conditioner to continue to run and restore the indoor unit correction amount. At the same time, the cumulative value of the first protection is increased by 1.
  • control method of the air conditioner includes:
  • the indoor unit startup capacity is less than the capacity threshold
  • S804 determine whether the outdoor unit is under-voltage protected. If yes, go to S806; if no, go back to S804;
  • S806 Adjust the opening degree of the electronic expansion valve of the indoor unit and the outdoor unit to the initial opening degree, and clear the correction amount of the current indoor unit;
  • the opening degrees of the electronic expansion valves of the indoor unit and the outdoor unit are adjusted to the initial opening. Degrees, and clear the correction amount of the current indoor unit. Turn on the timing. When the timing reaches the first preset time, judge again whether the low-voltage protection signal is detected. When the judgment result is no, control the air conditioner to continue to run and restore the indoor unit correction amount. At the same time, the cumulative value of the first protection is increased by 1.
  • a control device 900 for an air conditioner includes at least one indoor unit and one outdoor unit.
  • the control device includes a memory 902 and a processor 904.
  • the memory 902 is configured to store a computer program; the processor 904 is configured to execute the computer program to: adjust the opening degree of the electronic expansion valve when the power-on capacity of the indoor unit is less than or equal to a capacity threshold and a low-voltage protection signal is received.
  • the startup capacity of the indoor unit of the air conditioner is less than or equal to the capacity threshold, which indicates that the air conditioner has a small working load, and the opening degree of the electronic expansion valve is small at this time.
  • the start-up capacity of the indoor unit of the air conditioner is less than or equal to the capacity threshold, and the low-voltage protection signal of the outdoor unit of the air-conditioner is received, the low-voltage protection signal is a fault caused by the small operating load of the air conditioner and the low opening of the electronic expansion valve. The possibility of alarming is high.
  • the air conditioner instead of controlling the air conditioner to stop and troubleshoot, but to adjust the opening degree of the electronic expansion valve, if it is a false alarm caused by the small operating load of the air conditioner and the low opening degree of the electronic expansion valve, in After the opening of the electronic expansion valve is adjusted, the refrigerant further fills the pipeline. At this time, the low pressure of the outdoor unit rises above the low pressure protection threshold, the low pressure fault is eliminated, the outdoor unit no longer sends a low pressure protection signal, and the air conditioner can resume normal operation.
  • the processor is further configured to: after adjusting the opening degree of the electronic expansion valve, start the timing; when the timing reaches the first preset duration, if the low-pressure protection signal is still received, then Continue counting; otherwise, control the first protection cumulative value plus 1, and control the air conditioner to continue running.
  • the timer is started after the opening degree of the electronic expansion valve is adjusted, and judged after the timing reaches the first preset time period Whether the low-voltage fault of the outdoor unit is eliminated; if the low-voltage fault of the outdoor unit is not eliminated, that is, the low-voltage protection signal is still received, continue counting and wait for the refrigerant to further enter the pipeline; if the low-voltage fault of the outdoor unit has been eliminated, no low voltage is received anymore
  • the protection signal indicates that the air conditioner can resume normal operation at this time. At this time, the first protection cumulative value is increased by 1, the number of times that the fault returns to normal after the first preset time is recorded, and the air conditioner is controlled to continue running.
  • the processor is further configured to: when the timing reaches the second preset duration, if the low-voltage protection signal is still received, control the air conditioner to stop running and issue a prompt message; otherwise, control the Increase the cumulative value of two protections by 1 and control the air conditioner to continue running.
  • the low-pressure fault of the outdoor unit is judged again. Whether to exclude it. If a low-voltage protection signal is still received at this time, it indicates that the low-voltage fault is not a false alarm caused by the small capacity of the indoor unit. The fault cannot be eliminated automatically, so that the user can contact the maintenance personnel for on-site repair as soon as possible; if the timer reaches the second preset time, the low-voltage fault of the outdoor unit has been eliminated and no low-voltage protection signal is received, indicating that the air conditioner is now ready Normal operation is resumed. At this time, the second protection cumulative value is increased by 1, the number of times that the fault returns to normal after the second preset time period is recorded, and the air conditioner is controlled to continue running.
  • the processor is further configured to reduce an operating frequency of the outdoor unit.
  • the higher the operating frequency of the outdoor unit of the air conditioner the higher the corresponding pressure value in the normal pipe.
  • the low frequency failure is not eliminated, and the operating frequency of the outdoor unit is further reduced. It can make the low-voltage fault recover more quickly and make the air conditioner return to normal work faster.
  • the processor is further configured to: while adjusting the opening degree of the electronic expansion valve, clear the indoor unit correction amount; while controlling the steps that the air conditioner continues to operate, restore the indoor Machine correction.
  • the processor is further configured to: continuously acquire the first protection cumulative value and the second protection cumulative value within a third preset time period; and reach the first protection when the first protection cumulative value reaches the first protection
  • the control air conditioner is stopped and a prompt message is issued.
  • the first protection cumulative value and the second protection cumulative value are continuously acquired within a third preset time period, the first protection cumulative value reaches the first protection threshold, and / or the second protection cumulative value reaches the second
  • the protection threshold value indicates that the air conditioner has too many low-voltage faults in a short period of time
  • the low-voltage protection signal is not a false alarm due to a small amount of indoor unit startup. Therefore, the air conditioner is controlled to stop running and send a fault prompt message to the user to prompt the user
  • the air conditioner is faulty, and the fault cannot be eliminated automatically, so that the user can contact the maintenance personnel to repair it at the first time.
  • the processor is further configured to: adjust the opening of the electronic expansion valve to the initial opening degree; or adjust the opening of the electronic expansion valve to the maximum opening degree; or adjust the electronic expansion valve to increase the preset opening degree.
  • the step of adjusting the opening degree of the electronic expansion valve is specifically adjusting the opening of the electronic expansion valve to the initial opening degree so that the air conditioner operates in the initial state; or the step of adjusting the opening degree of the electronic expansion valve is specifically adjusting the electronic The expansion valve is opened to the maximum opening degree, so that the low-pressure fault can be eliminated at the fastest speed; or the step of adjusting the opening degree of the electronic expansion valve is specifically to adjust the electronic expansion valve to increase the preset opening degree, so that the low-pressure fault is automatically eliminated according to the preset steps. .
  • an air conditioner in an embodiment of the third aspect of the present application, includes the control device of the air conditioner described in any one of the foregoing embodiments. Therefore, the air conditioner includes any of the air conditioners described in any of the foregoing embodiments. All the beneficial effects of the control device of the air conditioner described above.
  • the term “plurality” means two or more. Unless otherwise specifically defined, the directions or positional relationships indicated by the terms “upper” and “lower” are based on those shown in the drawings. The orientation or positional relationship is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, structure and operation in a specific orientation, and therefore cannot be understood as a limitation on this application;
  • the terms “connected”, “installed”, “fixed” and the like should be understood in a broad sense. For example, “connected” can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or through the middle. The media are indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

Abstract

本申请公开了一种空调器的控制方法、一种空调器的控制装置和一种空调器；空调器的控制方法包括：当室内机的开机容量小于或等于容量阈值时，且接收到低压保护信号时，调节电子膨胀阀的开度。应用了本发明提供的技术方案，可以在室内机开机容量较小时避免由于空调器的运行负荷小、电子膨胀阀开度低所导致的低压保护信号误报造成的空调器停机，避免了空调器在室内机开机容量较小时所导致的频繁的误停机现象，可以有效的提高空调器的可靠性，同时进一步提高用户使用空调的舒适性。

Description

空调器的控制方法、控制装置及空调器
相关申请的交叉引用
本申请要求广东美的暖通设备有限公司,美的集团股份有限公司于2018年8月3日提交的、发明名称为“空调器的控制方法、控制装置及空调器”的、中国专利申请号为“201810878616.7”的优先权。
技术领域
本申请涉及空调控制技术领域，具体而言，涉及一种空调器的控制方法、一种空调器的控制装置和一种空调器。
背景技术
目前，在相关技术中，多联机的空调系统一般都会匹配多台室内机运行，当只开较少室内机或者只开一台室内机的时候，有时会出现内机电子膨胀阀开度关的太小，造成低压过低而导致室外机误触发低压保护而导致故障停机，在故障自动恢复后空调系统再次运行，又会因为同样的原因再次出现低压保护，使空调系统频繁启停。在空调系统工作于低温制冷模式时，出现上述误停机现象的次数尤为频繁，严重了影响空调系统的可靠性以及用户使用空调的舒适性。
发明内容
本申请旨在至少在一定程度上解决相关技术中的技术问题之一。
为此，本申请提出一种空调器的控制方法，该方法可以有效的提高空调器的可靠性，以及提高用户使用空调的舒适性。
本申请还提出了一种空调器的控制装置和空调器。
为了解决上述问题，本申请第一方面实施例的一种空调器的控制方法，空调器包括至少一个室内机和一个室外机，控制方法包括：当室内机的开机容量小于或等于容量阈值时，且接收到低压保护信号时，调节电子膨胀阀的开度。
在该技术方案中，空调器室内机的开机容量小于或等于容量阈值，说明空调器工作负荷较小，此时电子膨胀阀的开度较小。当空调器室内机的开机容量小于或等于容量阈值，且接收到空调器室外机的低压保护信号时，该低压保护信号是由于空调器的运行负荷小、电子膨胀阀开度低所导致的误报的可能性较高，此时不控制空调器停机排障，而是调节电子膨胀阀的开度，如果是由于空调器的运行负荷小、电子膨胀阀开度低所导致的误报，在调节电子膨胀阀开度后，冷媒进一步充盈管路，此时室外机的低压升高至高于低压保护阈 值，低压故障被排除，室外机不再发送低压保护信号，空调器即可恢复正常运行。应用了本申请提供的技术方案，可以在室内机开机容量较小时避免由于空调器的运行负荷小、电子膨胀阀开度低所导致的低压保护信号误报造成的空调器停机，避免了空调器在室内机开机容量较小时所导致的频繁的误停机现象，可以有效的提高空调器的可靠性，同时进一步提高用户使用空调的舒适性。
具体地，在空调器开机工作时，判断空调器室内机的开机容量是否小于或等于容量阈值，如果室内机的开机容量是否小于或等于容量阈值，在接收到室外机的低压保护信号时，控制室内机和室外机的电子膨胀阀都增加开度，增加空调器的运行负荷，增加通过电子膨胀阀的冷媒数量。当冷媒进一步充盈管路后，室外机的低压故障被排除，室外机不再发送低压保护信号，此时控制空调器恢复正常运行，避免了空调器因为低压保护信号的误报而频繁停机，提高了空调器的可靠性和用户使用空调的舒适性。
另外，本申请提供的上述技术方案中的空调器的控制方法还可以具有如下附加技术特征：
在上述技术方案中，优选地，空调器的控制方法还包括：在调节电子膨胀阀的开度后，启动计时；当计时达到第一预设时长时，若仍然接收到低压保护信号，则继续计时；否则，控制第一保护累计值加1，并控制空调器继续运行。
在该技术方案中，由于在增加电子膨胀阀的开度后，冷媒进入管路需要一定时间，因此在调节电子膨胀阀的开度后启动计时，在当计时达到第一预设时长后再判断室外机的低压故障是否排除；若室外机的低压故障未排除，即仍然接收到低压保护信号，则继续计时，等待冷媒进一步进入管路；若室外机的低压故障已经排除，不再接收到低压保护信号，表示此时空调器已可恢复正常工作，此时控制第一保护累计值加1，记录故障耗时第一预设时长后恢复正常的次数，并控制空调器继续运行。
在上述任一技术方案中，优选地，在继续计时的步骤后，还包括：当计时达到第二预设时长时，若仍然接收到低压保护信号，则控制空调器停止运行并发出提示信息；否则控制第二保护累计值加1，并控制空调器继续运行。
在该技术方案中，在调节电子膨胀阀的开度并计时达到第一预设时长，但室外机的低压故障未排除，继续计时并达到第二预设时长时，再次判断室外机的低压故障是否排除，若此时仍然接收到低压保护信号，说明该低压故障并非由于室内机开机容量小导致的误报，因此需要控制空调器停止运行并发出提示信息，提示用户空调器出现故障，且该故障无法自动排除，以使用户第一时间联系维修人员上门维修；若计时达到第二预设时长时，室外机的低压故障已经排除，不再接收到低压保护信号，表示此时空调器已可恢复正常工作，此时控制第二保护累计值加1，记录故障耗时第二预设时长后恢复正常的次数，并控制空调器继续运行。
在上述任一技术方案中，优选地，在继续计时的步骤的同时，还包括：降低室外机的 运行频率。
在该技术方案中，空调室外机的运行频率越高，正常管内对应的压力值也越高，在经过第一预设时长后，低压故障未排除的情况下，进一步降低室外机的运行频率，可以使低压故障更快的恢复，使空调器更快地回到正常工作。
在上述任一技术方案中，优选地，在调节电子膨胀阀的开度的步骤的同时，还包括：清除室内机修正量；在控制空调器继续运行的步骤的同时，还包括：恢复室内机修正量。
在该技术方案中，由于在空调器的实际应用中，存在一些针对传感器误差值的室内机修正量，如环境温度修正量、排气温度修正量、蒸发器出口温度修正量等，这些修正量会使室外机的运行频率在原有的技术长额外增加，以保证空调器的温度调节效果与用户设置保持一致，因此在室外机发出低压保护信号时，清除室内机修正量，以使室外机运行频率回到原有运行频率，可以加快低压故障排除的速度。同时在低压故障排除后，控制空调器继续运行的步骤的同时，恢复室内机修正量，以保证空调器的温度调节效果。
在上述任一技术方案中，优选地，在控制空调器继续运行的步骤之后，还包括：在第三预设时长内，持续获取第一保护累计值和第二保护累计值；在第一保护累计值达到第一保护阈值，和/或第二保护累计值达到第二保护阈值时，控制空调器停止运行并发出提示信息。
在该技术方案中，在第三预设时长内持续获取第一保护累计值和第二保护累计值，在第一保护累计值达到第一保护阈值，和/或第二保护累计值达到第二保护阈值时，说明空调器在短时间内出现低压故障的次数过多，低压保护信号并非由于室内机开机量小而导致的误报，因此控制空调器停止运行并向用户发出故障提示信息提示用户空调器出现故障，且该故障无法自动排除，以使用户第一时间联系维修人员上门维修。
在上述任一技术方案中，优选地，调节电子膨胀阀的开度的步骤，具体为：调节电子膨胀阀开启至初始开度；或调节电子膨胀阀开启至最大开度；或调节电子膨胀阀增加预设开度。
在该技术方案中，调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀开启至初始开度，以使空调器以初态运行；或调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀开启至最大开度，以使低压故障以最快速度排除；或调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀增加预设开度，以使低压故障按照预设步骤自排除。
为了解决上述问题，本申请第二方面实施例提出的一种空调器的控制装置，空调器包括至少一个室内机和一个室外机，控制装置包括：存储器和处理器；存储器用于存储计算机程序；处理器用于执行计算机程序以：当室内机的开机容量小于或等于容量阈值时，且接收到低压保护信号时，调节电子膨胀阀的开度。
在该技术方案中，空调器室内机的开机容量小于或等于容量阈值，说明空调器工作负荷较小，此时电子膨胀阀的开度较小。当空调器室内机的开机容量小于或等于容量阈值， 且接收到空调器室外机的低压保护信号时，该低压保护信号是由于空调器的运行负荷小、电子膨胀阀开度低所导致的误报的可能性较高，此时不控制空调器停机排障，而是调节电子膨胀阀的开度，如果是由于空调器的运行负荷小、电子膨胀阀开度低所导致的误报，在调节电子膨胀阀开度后，冷媒进一步充盈管路，此时室外机的低压升高至高于低压保护阈值，低压故障被排除，室外机不再发送低压保护信号，空调器即可恢复正常运行。应用了本申请提供的技术方案，可以在室内机开机容量较小时避免由于空调器的运行负荷小、电子膨胀阀开度低所导致的低压保护信号误报造成的空调器停机，避免了空调器在室内机开机容量较小时所导致的频繁的误停机现象，可以有效的提高空调器的可靠性，同时进一步提高用户使用空调的舒适性。
在上述技术方案中，优选地，处理器还用于：在调节电子膨胀阀的开度后，启动计时；当计时达到第一预设时长时，若仍然接收到低压保护信号，则继续计时；否则，控制第一保护累计值加1，并控制空调器继续运行。
在该技术方案中，由于在增加电子膨胀阀的开度后，冷媒进入管路需要一定时间，因此在调节电子膨胀阀的开度后启动计时，在当计时达到第一预设时长后再判断室外机的低压故障是否排除；若室外机的低压故障未排除，即仍然接收到低压保护信号，则继续计时，等待冷媒进一步进入管路；若室外机的低压故障已经排除，不再接收到低压保护信号，表示此时空调器已可恢复正常工作，此时控制第一保护累计值加1，记录故障耗时第一预设时长后恢复正常的次数，并控制空调器继续运行。
在上述任一技术方案中，优选地，处理器还用于：当计时达到第二预设时长时，若仍然接收到低压保护信号，则控制空调器停止运行并发出提示信息；否则控制第二保护累计值加1，并控制空调器继续运行。
在该技术方案中，在调节电子膨胀阀的开度并计时达到第一预设时长，但室外机的低压故障未排除，继续计时并达到第二预设时长时，再次判断室外机的低压故障是否排除，若此时仍然接收到低压保护信号，说明该低压故障并非由于室内机开机容量小导致的误报，因此需要控制空调器停止运行并发出提示信息，提示用户空调器出现故障，且该故障无法自动排除，以使用户第一时间联系维修人员上门维修；若计时达到第二预设时长时，室外机的低压故障已经排除，不再接收到低压保护信号，表示此时空调器已可恢复正常工作，此时控制第二保护累计值加1，记录故障耗时第二预设时长后恢复正常的次数，并控制空调器继续运行。
在上述任一技术方案中，优选地，处理器还用于：降低室外机的运行频率。
在该技术方案中，空调室外机的运行频率越高，正常管内对应的压力值也越高，在经过第一预设时长后，低压故障未排除的情况下，进一步降低室外机的运行频率，可以使低压故障更快的恢复，使空调器更快地回到正常工作。
在上述任一技术方案中，优选地，处理器还用于：在调节电子膨胀阀的开度的步骤的 同时，清除室内机修正量；在控制空调器继续运行的步骤的同时，恢复室内机修正量。
在该技术方案中，由于在空调器的实际应用中，存在一些针对传感器误差值的室内机修正量，如环境温度修正量、排气温度修正量、蒸发器出口温度修正量等，这些修正量会使室外机的运行频率在原有的技术长额外增加，以保证空调器的温度调节效果与用户设置保持一致，因此在室外机发出低压保护信号时，清除室内机修正量，以使室外机运行频率回到原有运行频率，可以加快低压故障排除的速度。同时在低压故障排除后，控制空调器继续运行的步骤的同时，恢复室内机修正量，以保证空调器的温度调节效果。
在上述任一技术方案中，优选地，处理器还用于：在第三预设时长内，持续获取第一保护累计值和第二保护累计值；在第一保护累计值达到第一保护阈值，和/或第二保护累计值达到第二保护阈值时，控制空调器停止运行并发出提示信息。
在该技术方案中，在第三预设时长内持续获取第一保护累计值和第二保护累计值，在第一保护累计值达到第一保护阈值，和/或第二保护累计值达到第二保护阈值时，说明空调器在短时间内出现低压故障的次数过多，低压保护信号并非由于室内机开机量小而导致的误报，因此控制空调器停止运行并向用户发出故障提示信息提示用户空调器出现故障，且该故障无法自动排除，以使用户第一时间联系维修人员上门维修。
在上述任一技术方案中，优选地，处理器还用于：调节电子膨胀阀开启至初始开度；或调节电子膨胀阀开启至最大开度；或调节电子膨胀阀增加预设开度。
在该技术方案中，调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀开启至初始开度，以使空调器以初态运行；或调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀开启至最大开度，以使低压故障以最快速度排除；或调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀增加预设开度，以使低压故障按照预设步骤自排除。
本申请第三方面提供了一种空调器，该空调器包括上述任一技术方案中所述的空调器的控制装置，因此，该空调器包括上述任一技术方案中所述的空调器的控制装置的全部有益效果。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，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示出了根据本申请的一个实施例的空调器的控制方法的流程图；
图2示出了根据本申请的另一个实施例的空调器的控制方法的流程图；
图3示出了根据本申请的再一个实施例的空调器的控制方法的流程图；
图4示出了根据本申请的又一个实施例的空调器的控制方法的流程图；
图5示出了根据本申请的又一个实施例的空调器的控制方法的流程图；
图6示出了根据本申请的又一个实施例的空调器的控制方法的流程图；
图7示出了根据本申请的又一个实施例的空调器的控制方法的流程图；
图8示出了根据本申请的又一个实施例的空调器的控制方法的流程图；
图9示出了根据本申请的一个实施例的空调器的控制装置的框图。
具体实施方式
为了能够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9描述根据本申请一些实施例所述空调器的控制方法、空调器的控制装置和空调器。
如图1所示，在本申请第一方面的实施例中，提供了一种空调器的控制方法，空调器包括至少一个室内机和一个室外机，控制方法包括：
S102，当室内机的开机容量小于或等于容量阈值时，且接收到低压保护信号时，调节电子膨胀阀的开度。
在该实施例中，空调器室内机的开机容量小于或等于容量阈值，说明空调器工作负荷较小，此时电子膨胀阀的开度较小。当空调器室内机的开机容量小于或等于容量阈值，且接收到空调器室外机的低压保护信号时，该低压保护信号是由于空调器的运行负荷小、电子膨胀阀开度低所导致的误报的可能性较高，此时不控制空调器停机排障，而是调节电子膨胀阀的开度，如果是由于空调器的运行负荷小、电子膨胀阀开度低所导致的误报，在调节电子膨胀阀开度后，冷媒进一步充盈管路，此时室外机的低压升高至高于低压保护阈值，低压故障被排除，室外机不再发送低压保护信号，空调器即可恢复正常运行。应用了本申请提供的技术方案，可以在室内机开机容量较小时避免由于空调器的运行负荷小、电子膨胀阀开度低所导致的低压保护信号误报造成的空调器停机，避免了空调器在室内机开机容量较小时所导致的频繁的误停机现象，可以有效的提高空调器的可靠性，同时进一步提高用户使用空调的舒适性。
具体地，在空调器开机工作时，判断空调器室内机的开机容量是否小于或等于容量阈值，如果室内机的开机容量是否小于或等于容量阈值，在接收到室外机的低压保护信号时，控制室内机和室外机的电子膨胀阀都增加开度，增加空调器的运行负荷，增加通过电子膨胀阀的冷媒数量。当冷媒进一步充盈管路后，室外机的低压故障被排除，室外机不再发送 低压保护信号，此时控制空调器恢复正常运行，避免了空调器因为低压保护信号的误报而频繁停机，提高了空调器的可靠性和用户使用空调的舒适性。
在本申请的一个实施例中，优选地，如图2所示，空调器的控制方法包括：
S202，当室内机的开机容量小于或等于容量阈值时，且接收到低压保护信号时，调节电子膨胀阀的开度；
S204，在调节电子膨胀阀的开度后，启动计时；
S206，当计时达到第一预设时长时，判断是否仍然接收到低压保护信号，是，进入S208，否，进入S210；
S208，继续计时；
S210，控制第一保护累计值加1，并控制空调器继续运行。
在该实施例中，由于在增加电子膨胀阀的开度后，冷媒进入管路需要一定时间，因此在调节电子膨胀阀的开度后启动计时，在当计时达到第一预设时长后再判断室外机的低压故障是否排除；若室外机的低压故障未排除，即仍然接收到低压保护信号，则继续计时，等待冷媒进一步进入管路；若室外机的低压故障已经排除，不再接收到低压保护信号，表示此时空调器已可恢复正常工作，此时控制第一保护累计值加1，记录故障耗时第一预设时长后恢复正常的次数，并控制空调器继续运行。
在本申请的一个实施例中，优选地，如图3所示，空调器的控制方法包括：
S302，当室内机的开机容量小于或等于容量阈值时，且接收到低压保护信号时，调节电子膨胀阀的开度；
S304，在调节电子膨胀阀的开度后，启动计时；
S306，当计时达到第一预设时长时，判断是否仍然接收到低压保护信号，是，进入S308，否，进入S310；
S308，继续计时；
S310，控制第一保护累计值加1，并控制空调器继续运行；
S312，当计时达到第二预设时长时，判断是否仍然接收到低压保护信号，是，进入S314，否，进入S316；
S314，控制空调器停止运行并发出提示信息；
S316，控制第二保护累计值加1，并控制空调器继续运行。
在该实施例中，在调节电子膨胀阀的开度并计时达到第一预设时长，但室外机的低压故障未排除，继续计时并达到第二预设时长时，再次判断室外机的低压故障是否排除，若此时仍然接收到低压保护信号，说明该低压故障并非由于室内机开机容量小导致的误报，因此需要控制空调器停止运行并发出提示信息，提示用户空调器出现故障，且该故障无法自动排除，以使用户第一时间联系维修人员上门维修；若计时达到第二预设时长时，室外机的低压故障已经排除，不再接收到低压保护信号，表示此时空调器已可恢复正常工作， 此时控制第二保护累计值加1，记录故障耗时第二预设时长后恢复正常的次数，并控制空调器继续运行。
在本申请的一个实施例中，优选地，如图4所示，空调器的控制方法包括：
S402，当室内机的开机容量小于或等于容量阈值时，且接收到低压保护信号时，调节电子膨胀阀的开度；
S404，在调节电子膨胀阀的开度后，启动计时；
S406，当计时达到第一预设时长时，判断是否仍然接收到低压保护信号，是，进入S408，否，进入S410；
S408，继续计时并降低室外机的运行频率；
S410，控制第一保护累计值加1，并控制空调器继续运行；
S412，当计时达到第二预设时长时，判断是否仍然接收到低压保护信号，是，进入S414，否，进入S416；
S414，控制空调器停止运行并发出提示信息；
S416，控制第二保护累计值加1，并控制空调器继续运行。
在该实施例中，空调室外机的运行频率越高，正常管内对应的压力值也越高，在经过第一预设时长后，低压故障未排除的情况下，进一步降低室外机的运行频率，可以使低压故障更快的恢复，使空调器更快地回到正常工作。
在本申请的一个实施例中，优选地，如图5所示，空调器的控制方法包括：
S502，当室内机的开机容量小于或等于容量阈值时，且接收到低压保护信号时，调节电子膨胀阀的开度并清除室内机修正量；
S504，在调节电子膨胀阀的开度后，启动计时；
S506，当计时达到第一预设时长时，判断是否仍然接收到低压保护信号，是，进入S508，否，进入S510；
S508，继续计时并降低室外机的运行频率；
S510，控制第一保护累计值加1，并控制空调器继续运行并恢复室内机修正量；
S512，当计时达到第二预设时长时，判断是否仍然接收到低压保护信号，是，进入S514，否，进入S516；
S514，控制空调器停止运行并发出提示信息；
S516，控制第二保护累计值加1，并控制空调器继续运行并恢复室内机修正量。
在该实施例中，由于在空调器的实际应用中，存在一些针对传感器误差值的室内机修正量，如环境温度修正量、排气温度修正量、蒸发器出口温度修正量等，这些修正量会使室外机的运行频率在原有的技术长额外增加，以保证空调器的温度调节效果与用户设置保持一致，因此在室外机发出低压保护信号时，清除室内机修正量，以使室外机运行频率回到原有运行频率，可以加快低压故障排除的速度。同时在低压故障排除后，控制空调器继 续运行的步骤的同时，恢复室内机修正量，以保证空调器的温度调节效果。
在本申请的一个实施例中，优选地，如图6所示，空调器的控制方法包括：
S602，当室内机的开机容量小于或等于容量阈值时，且接收到低压保护信号时，调节电子膨胀阀的开度并清除室内机修正量；
S604，在调节电子膨胀阀的开度后，启动计时；
S606，当计时达到第一预设时长时，判断是否仍然接收到低压保护信号，是，进入S608，否，进入S610；
S608，继续计时并降低室外机的运行频率；
S610，控制第一保护累计值加1，并控制空调器继续运行并恢复室内机修正量；
S612，当计时达到第二预设时长时，判断是否仍然接收到低压保护信号，是，进入S614，否，进入S616；
S614，控制空调器停止运行并发出提示信息；
S616，控制第二保护累计值加1，并控制空调器继续运行并恢复室内机修正量；
S618，在第三预设时长内，持续获取第一保护累计值和第二保护累计值；
S620，在第一保护累计值达到第一保护阈值，和/或第二保护累计值达到第二保护阈值时，控制空调器停止运行并发出提示信息。
在该实施例中，在第三预设时长内持续获取第一保护累计值和第二保护累计值，在第一保护累计值达到第一保护阈值，和/或第二保护累计值达到第二保护阈值时，说明空调器在短时间内出现低压故障的次数过多，低压保护信号并非由于室内机开机量小而导致的误报，因此控制空调器停止运行并向用户发出故障提示信息提示用户空调器出现故障，且该故障无法自动排除，以使用户第一时间联系维修人员上门维修。
优选地，第一保护阈值设置为3，第二保护阈值设置为2，当第一保护累计值大于或等于3，和/或第二保护阈值大于或等于2时，空调器低压保护停机，且无法自动恢复。
在本申请的一个实施例中，优选地，调节电子膨胀阀的开度的步骤，具体为：调节电子膨胀阀开启至初始开度；或调节电子膨胀阀开启至最大开度；或调节电子膨胀阀增加预设开度。
在该实施例中，调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀开启至初始开度，以使空调器以初态运行；或调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀开启至最大开度，以使低压故障以最快速度排除；或调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀增加预设开度，以使低压故障按照预设步骤自排除。
在本申请的一个实施例中，优选地，如图7所示，空调器的控制方法包括：
S702，室内机开机容量小于容量阈值；
S704，判断室外机是否低压保护，是，进入S706，否，返回S704；
S706，将室内机和室外机的电子膨胀阀开度调节至初始开度，并清除当前室内机的修 正量；
S708，开启计时，当计时达到第一预设时间后，再次判断是否检测到低压保护信号，是，进入S712，否，进入S710；
S710，控制空调器继续运行并恢复室内机修正量，同时第一保护累计值加1；
S712，降低室外机的运行频率并继续计时；
S714，当计时达到第二预设时间时，再次判断是否检测到低压保护信号，是，进入S718，否，进入S716；
S716，控制空调器继续运行并恢复室内机修正量，同时第二保护累计值加1；
S718，控制空调器停止运行并发出故障提示信息。
在该实施例中，当室内机开机容量小于容量阈值时，判断是否接收到室外机的低压保护信号，当判断结果为是，则将室内机和室外机的电子膨胀阀开度调节至初始开度，并清除当前室内机的修正量。开启计时，当计时达到第一预设时间后，再次判断是否检测到低压保护信号，当判断结果为否时，控制空调器继续运行并恢复室内机修正量，同时第一保护累计值加1；当判断结果为是时，降低室外机的运行频率并继续计时；当计时达到第二预设时间时，再次判断是否检测到低压保护信号，当判断结果为否时，控制空调器继续运行并恢复室内机修正量，同时第二保护累计值加1；当判断结果为是时，控制空调器停止运行并发出故障提示信息。
在本申请的一个实施例中，优选地，如图8所示，空调器的控制方法包括：
S802，室内机开机容量小于容量阈值；
S804，判断室外机是否低压保护，是，进入S806，否，返回S804；
S806，将室内机和室外机的电子膨胀阀开度调节至初始开度，并清除当前室内机的修正量；
S808，开启计时，当计时达到第一预设时间后，再次判断是否检测到低压保护信号，是，进入S812，否，进入S810；
S810，控制空调器继续运行并恢复室内机修正量，同时第一保护累计值加1；
S812，当计时达到第二预设时间时，再次判断是否检测到低压保护信号，是，进入S816，否，进入S814；
S814，控制空调器继续运行并恢复室内机修正量，同时第二保护累计值加1；
S816，控制空调器停止运行并发出故障提示信息。
在该实施例中，当室内机开机容量小于容量阈值时，判断是否接收到室外机的低压保护信号，当判断结果为是，则将室内机和室外机的电子膨胀阀开度调节至初始开度，并清除当前室内机的修正量。开启计时，当计时达到第一预设时间后，再次判断是否检测到低压保护信号，当判断结果为否时，控制空调器继续运行并恢复室内机修正量，同时第一保护累计值加1；当判断结果为是时，继续计时；当计时达到第二预设时间时，再次判断是 否检测到低压保护信号，当判断结果为否时，控制空调器继续运行并恢复室内机修正量，同时第二保护累计值加1；当判断结果为是时，控制空调器停止运行并发出故障提示信息。
如图9所示，在本申请第二方面的实施例中，提供了一种空调器的控制装置900，空调器包括至少一个室内机和一个室外机，控制装置包括：存储器902和处理器904；存储器902用于存储计算机程序；处理器904用于执行计算机程序以：当室内机的开机容量小于或等于容量阈值时，且接收到低压保护信号时，调节电子膨胀阀的开度。
在该实施例中，空调器室内机的开机容量小于或等于容量阈值，说明空调器工作负荷较小，此时电子膨胀阀的开度较小。当空调器室内机的开机容量小于或等于容量阈值，且接收到空调器室外机的低压保护信号时，该低压保护信号是由于空调器的运行负荷小、电子膨胀阀开度低所导致的误报的可能性较高，此时不控制空调器停机排障，而是调节电子膨胀阀的开度，如果是由于空调器的运行负荷小、电子膨胀阀开度低所导致的误报，在调节电子膨胀阀开度后，冷媒进一步充盈管路，此时室外机的低压升高至高于低压保护阈值，低压故障被排除，室外机不再发送低压保护信号，空调器即可恢复正常运行。应用了本申请提供的技术方案，可以在室内机开机容量较小时避免由于空调器的运行负荷小、电子膨胀阀开度低所导致的低压保护信号误报造成的空调器停机，避免了空调器在室内机开机容量较小时所导致的频繁的误停机现象，可以有效的提高空调器的可靠性，同时进一步提高用户使用空调的舒适性。
在本申请的一个实施例中，优选地，处理器还用于：在调节电子膨胀阀的开度后，启动计时；当计时达到第一预设时长时，若仍然接收到低压保护信号，则继续计时；否则，控制第一保护累计值加1，并控制空调器继续运行。
在该实施例中，由于在增加电子膨胀阀的开度后，冷媒进入管路需要一定时间，因此在调节电子膨胀阀的开度后启动计时，在当计时达到第一预设时长后再判断室外机的低压故障是否排除；若室外机的低压故障未排除，即仍然接收到低压保护信号，则继续计时，等待冷媒进一步进入管路；若室外机的低压故障已经排除，不再接收到低压保护信号，表示此时空调器已可恢复正常工作，此时控制第一保护累计值加1，记录故障耗时第一预设时长后恢复正常的次数，并控制空调器继续运行。
在本申请的一个实施例中，优选地，处理器还用于：当计时达到第二预设时长时，若仍然接收到低压保护信号，则控制空调器停止运行并发出提示信息；否则控制第二保护累计值加1，并控制空调器继续运行。
在该实施例中，在调节电子膨胀阀的开度并计时达到第一预设时长，但室外机的低压故障未排除，继续计时并达到第二预设时长时，再次判断室外机的低压故障是否排除，若此时仍然接收到低压保护信号，说明该低压故障并非由于室内机开机容量小导致的误报，因此需要控制空调器停止运行并发出提示信息，提示用户空调器出现故障，且该故障无法自动排除，以使用户第一时间联系维修人员上门维修；若计时达到第二预设时长时，室外 机的低压故障已经排除，不再接收到低压保护信号，表示此时空调器已可恢复正常工作，此时控制第二保护累计值加1，记录故障耗时第二预设时长后恢复正常的次数，并控制空调器继续运行。
在本申请的一个实施例中，优选地，处理器还用于：降低室外机的运行频率。
在该实施例中，空调室外机的运行频率越高，正常管内对应的压力值也越高，在经过第一预设时长后，低压故障未排除的情况下，进一步降低室外机的运行频率，可以使低压故障更快的恢复，使空调器更快地回到正常工作。
在本申请的一个实施例中，优选地，处理器还用于：在调节电子膨胀阀的开度的步骤的同时，清除室内机修正量；在控制空调器继续运行的步骤的同时，恢复室内机修正量。
在该实施例中，由于在空调器的实际应用中，存在一些针对传感器误差值的室内机修正量，如环境温度修正量、排气温度修正量、蒸发器出口温度修正量等，这些修正量会使室外机的运行频率在原有的技术长额外增加，以保证空调器的温度调节效果与用户设置保持一致，因此在室外机发出低压保护信号时，清除室内机修正量，以使室外机运行频率回到原有运行频率，可以加快低压故障排除的速度。同时在低压故障排除后，控制空调器继续运行的步骤的同时，恢复室内机修正量，以保证空调器的温度调节效果。
在本申请的一个实施例中，优选地，处理器还用于：在第三预设时长内，持续获取第一保护累计值和第二保护累计值；在第一保护累计值达到第一保护阈值，和/或第二保护累计值达到第二保护阈值时，控制空调器停止运行并发出提示信息。
在该实施例中，在第三预设时长内持续获取第一保护累计值和第二保护累计值，在第一保护累计值达到第一保护阈值，和/或第二保护累计值达到第二保护阈值时，说明空调器在短时间内出现低压故障的次数过多，低压保护信号并非由于室内机开机量小而导致的误报，因此控制空调器停止运行并向用户发出故障提示信息提示用户空调器出现故障，且该故障无法自动排除，以使用户第一时间联系维修人员上门维修。
在本申请的一个实施例中，优选地，处理器还用于：调节电子膨胀阀开启至初始开度；或调节电子膨胀阀开启至最大开度；或调节电子膨胀阀增加预设开度。
在该实施例中，调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀开启至初始开度，以使空调器以初态运行；或调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀开启至最大开度，以使低压故障以最快速度排除；或调节电子膨胀阀的开度的步骤具体为调节电子膨胀阀增加预设开度，以使低压故障按照预设步骤自排除。
在本申请第三方面的实施例中，提供了一种空调器，该空调器包括上述任一实施例中所述的空调器的控制装置，因此，该空调器包括上述任一实施例中所述的空调器的控制装置的全部有益效果。
在本申请的描述中，术语“多个”则指两个或两个以上，除非另有明确的限定，术语“上”、“下”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元件必须具有特定的方位、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；术语“连接”、“安装”、“固定”等均应做广义理解，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；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。
在本申请的描述中，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。在本申请中，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。
以上所述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. 一种空调器的控制方法，所述空调器包括至少一个室内机和一个室外机，其特征在于，所述控制方法包括：
    确认所述室内机的开机容量小于或等于容量阈值，且接收到低压保护信号，则调节电子膨胀阀的开度。
  2. 根据权利要求1所述的空调器的控制方法，其特征在于，还包括：
    确认已调节电子膨胀阀的开度，启动计时；
    计时达到第一预设时长，检测接收到所述低压保护信号，继续计时；否则，
    控制第一保护累计值加1，并控制所述空调器继续运行。
  3. 根据权利要求2所述的空调器的控制方法，其特征在于，所述继续计时的步骤，还包括：
    计时达到第二预设时长，检测接收到所述低压保护信号，控制所述空调器停止运行并发出提示信息；否则
    控制第二保护累计值加1，并控制所述空调器继续运行。
  4. 根据权利要求2或3所述的空调器的控制方法，其特征在于，所述继续计时的步骤，还包括：
    降低所述室外机的运行频率。
  5. 根据权利要求2至4中任一项所述的空调器的控制方法，其特征在于，
    所述调节电子膨胀阀的开度，还包括：清除室内机修正量；
    所述控制所述空调器继续运行，还包括：恢复所述室内机修正量。
  6. 根据权利要求2至4中任一项所述的空调器的控制方法，其特征在于，所述控制所述空调器继续运行的步骤，还包括：
    持续获取在第三预设时长内所述第一保护累计值和所述第二保护累计值；
    所述第一保护累计值达到第一保护阈值，和/或所述第二保护累计值达到第二保护阈值，控制所述空调器停止运行并发出所述提示信息。
  7. 根据权利要求1至6中任一项所述的空调器的控制方法，其特征在于，所述调节电子膨胀阀的开度的步骤，具体为：
    调节所述电子膨胀阀开启至初始开度；或
    调节所述电子膨胀阀开启至最大开度；或
    调节所述电子膨胀阀增加预设开度。
  8. 一种空调器的控制装置，所述空调器包括至少一个室内机和一个室外机，其特征在于，所述控制装置包括：
    存储器，用于存储计算机程序；
    处理器，用于执行所述计算机程序，以及
    确认所述室内机的开机容量小于或等于容量阈值，且接收到低压保护信号，则调节电子膨胀阀的开度。
  9. 根据权利要求8所述的空调器的控制装置，其特征在于，所述处理器还用于：
    确认已调节电子膨胀阀的开度，启动计时；
    计时达到第一预设时长，检测接收到所述低压保护信号，继续计时；否则，
    控制第一保护累计值加1，并控制所述空调器继续运行。
  10. 根据权利要求9所述的空调器的控制装置，其特征在于，所述处理器还用于：
    计时达到第二预设时长，检测接收到所述低压保护信号，控制所述空调器停止运行并发出提示信息；否则
    控制第二保护累计值加1，并控制所述空调器继续运行。
  11. 根据权利要求9或10所述的空调器的控制装置，其特征在于，所述处理器还用于：
    降低所述室外机的运行频率。
  12. 根据权利要求9至11中任一项所述的空调器的控制装置，其特征在于，所述处理器还用于：
    调节电子膨胀阀的开度，清除室内机修正量；
    控制所述空调器继续运行，恢复所述室内机修正量。
  13. 根据权利要求9至11中任一项所述的空调器的控制装置，其特征在于，所述处理器还用于：
    持续获取在第三预设时长内所述第一保护累计值和所述第二保护累计值；
    所述第一保护累计值达到第一保护阈值，和/或所述第二保护累计值达到第二保护阈值，控制所述空调器停止运行并发出所述提示信息。
  14. 根据权利要求8至13中任一项所述的空调器的控制装置，其特征在于，所述处理器还用于：
    调节所述电子膨胀阀开启至初始开度；或
    调节所述电子膨胀阀开启至最大开度；或
    调节所述电子膨胀阀增加预设开度。
  15. 一种空调器，其特征在于，所述空调器包括如权利要求8至14中任一项所述的空调器的控制装置。
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