CN112268349B - Air conditioner, control method thereof, and computer-readable storage medium - Google Patents
Air conditioner, control method thereof, and computer-readable storage medium Download PDFInfo
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- CN112268349B CN112268349B CN202011157155.8A CN202011157155A CN112268349B CN 112268349 B CN112268349 B CN 112268349B CN 202011157155 A CN202011157155 A CN 202011157155A CN 112268349 B CN112268349 B CN 112268349B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000004590 computer program Methods 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 claims description 3
- 230000005347 demagnetization Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
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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
- F24F11/62—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
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
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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
- F24F11/62—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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/70—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
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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
- F24F11/70—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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/70—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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner and a control method thereof, and a computer readable storage medium, the method comprises the steps of obtaining a phase current peak value of a compressor, judging whether the frequency of the phase current peak value of the compressor in a preset current peak value range exceeds a preset frequency in a preset time period, if so, further judging whether the compressor operates in a torque compensation state, and if the compressor operates in the torque compensation state, reducing the compensation current of the compressor and increasing the operating frequency of the compressor. The air conditioner can realize the control method. The computer readable storage medium is capable of implementing the above-described method when executed by a processor. The invention can avoid the condition that the compressor stops running due to overhigh phase current of the compressor, and improve the running stability of the air conditioner.
Description
Technical Field
The present invention relates to the field of control of electrical appliances, and in particular, to a method for controlling an air conditioner, an air conditioner using the method, and a computer-readable storage medium for implementing the method.
Background
The air conditioner can be divided into a fixed-frequency air conditioner and an inverter air conditioner according to the operation frequency of a compressor of the air conditioner, wherein when the fixed-frequency air conditioner operates, the frequency of the compressor is fixed, and when the inverter air conditioner operates, the operation frequency of the compressor is changed. Because the variable frequency air conditioner has the advantages of energy conservation, low noise and the like, the variable frequency air conditioner is more and more favored by people.
Most of the existing inverter air conditioners adopt a single-rotor compressor, and due to the rotor structure of the single-rotor compressor, the situation that the suction pressure and the exhaust pressure are unbalanced exists in the low-frequency operation process, so that when the compressor operates at a lower frequency, extra compensation current is often required to be provided for the compressor, the purpose of balancing the suction pressure and the exhaust pressure in the low-frequency operation process is achieved, and the vibration and the stress of the compressor and a pipeline are further reduced. The section in which the compressor operates in the lower frequency range is generally referred to as a torque compensation section, and when the operating frequency of the compressor is in the torque compensation section, the operating state of the compressor is referred to as a torque compensation state.
Since the compressor needs to provide extra compensation current when operating in the torque compensation state, the peak value of the phase current of the compressor is higher than that when operating in the frequency of the latest non-torque compensation section, the phase current of the compressor is about 5A higher, and if the air conditioner is operating in a heavy load, the difference value of the phase current is higher.
When the existing inverter air conditioner runs, the phase current of the compressor is often required to be acquired and the effective value of the phase current is calculated, so that the rotating speed control of the rotor and the estimation of the position of the rotor are performed, the current protection shutdown of a hardware module is realized by utilizing the peak value of the phase current of the compressor, for example, once the phase current of the compressor is too high, the running of the compressor is stopped, so that the compressor is prevented from running under the too high current for a long time, and the damage of the compressor is avoided.
However, when the compressor is operated in the torque compensation state, the peak value of the phase current is high, and sometimes the phase current approaches or even exceeds the current threshold value of the current protection of the hardware module, so that a false alarm occurs. Once a false alarm occurs, the compressor stops running, and the normal operation of the air conditioner is influenced.
Disclosure of Invention
The first purpose of the present invention is to provide a control method for an air conditioner, which effectively avoids false alarm caused by too high phase current peak value of a compressor when the compressor is operated in a torque compensation state.
A second object of the present invention is to provide an air conditioner implementing the control method of the air conditioner.
A third object of the present invention is to provide a computer-readable storage medium implementing the control method of the air conditioner described above.
In order to achieve the first object of the present invention, the method for controlling an air conditioner according to the present invention includes obtaining a phase current peak value of a compressor, determining whether a number of times that the phase current peak value of the compressor is within a preset current peak value range exceeds a preset number of times within a preset time period, and if so, further determining whether the compressor is operating in a torque compensation state, and if so, reducing a compensation current of the compressor and increasing an operating frequency of the compressor.
According to the scheme, when the number of times of the phase current peak value of the compressor in the preset current peak value range exceeds the preset number of times and the compressor operates in the torque compensation state, the compensation current of the compressor is reduced, the operation frequency of the compressor is increased, and the phase current peak value of the compressor can be prevented from being high, so that the condition that the phase current peak value of the compressor is higher than the current threshold value of the current protection of the hardware module is avoided, the problem of false alarm is reduced, the compressor is prevented from stopping operation due to false alarm, and the normal operation of the air conditioner is ensured.
Preferably, the determining whether the compressor is operated in the torque compensation state includes: judging whether the running frequency of the compressor is within the range of the torque compensation frequency interval or not; increasing the operating frequency of the compressor includes: the operating frequency of the compressor is raised to exceed an upper threshold of the torque compensation frequency interval.
Therefore, the operation frequency of the compressor is increased to be higher than the upper limit threshold of the torque compensation frequency interval, the current compensation of the compressor is not needed, and the situation that the phase current peak value of the compressor is too high is avoided.
Further, the step of increasing the operating frequency of the compressor to exceed the upper threshold of the torque compensation frequency interval comprises: the operating frequency of the compressor is raised to a minimum frequency that exceeds an upper threshold of the torque compensation frequency interval.
Therefore, when the operating frequency of the compressor is increased, the operating frequency of the compressor is not increased greatly, but is increased to the minimum frequency exceeding the upper limit threshold of the torque compensation frequency interval, so that the phenomenon that the stable operation of the compressor is influenced due to the excessive increase of the operating frequency of the compressor can be avoided, and the stability of the operation of the air conditioner is improved.
In a further aspect, reducing the compensation current of the compressor comprises: the compensating current of the compressor is reduced according to a preset proportion.
Therefore, when the compensating current of the compressor is reduced, the compensating current of the compressor is adjusted according to the preset proportion, so that the compensating current of the compressor is reduced orderly, and the running stability of the compressor is improved.
In a further scheme, if the number of times that the phase current peak value of the compressor is in the preset current peak value range exceeds the preset number of times, but the compressor is not operated in the torque compensation state, the heat exchange efficiency of the air conditioner is increased.
Because the compressor is not operated in the torque compensation state, the phase current peak value of the compressor under the normal operation condition is close to the current threshold value of the hardware module current protection, and at the moment, the phase current peak value of the compressor needs to be reduced by increasing the heat exchange efficiency of the air conditioner, so that the phase current of the compressor is prevented from being too high.
Further, the increasing of the heat exchange efficiency of the air conditioner comprises: and if the air conditioner operates in a refrigeration mode, forbidding to reduce the opening degree of the electronic expansion valve, operating the outdoor unit fan at a preset ultrahigh rotating speed, and operating the indoor unit fan at a preset ultralow rotating speed.
Therefore, when the air conditioner is used for refrigerating, the rotating speed of the outdoor unit fan is increased, the rotating speed of the indoor unit fan is reduced, the heat exchange efficiency of the air conditioner can be improved, and the phase current peak value of the compressor is reduced.
Optionally, increasing the heat exchange efficiency of the air conditioner includes: and if the air conditioner operates in the heating mode, forbidding to reduce the opening degree of the electronic expansion valve, operating the outdoor unit fan at a preset ultra-low rotating speed or stopping the operation, and operating the indoor unit fan at a preset ultra-high rotating speed.
Therefore, when heating, the rotating speed of the fan of the indoor unit is increased, and the rotating speed of the fan of the outdoor unit is reduced, so that the heat exchange efficiency of the air conditioner can be improved, the phase current peak value of the compressor is reduced, and the condition of false alarm is avoided.
If the number of times of the phase current peak value of the compressor in the preset current peak value range does not exceed the preset number of times, whether the phase current peak value of the compressor exceeds the upper limit threshold value of the preset current peak value range or not in the preset time period is further judged, and if yes, the compressor stops running.
Therefore, once the phase current peak value is too high when the compressor normally operates, the compressor stops operating, the compressor is prevented from operating in a state of too high current, and the compressor is prevented from being damaged.
The further proposal is that when the compressor stops running, the prompt message of module circuit protection fault is sent out.
Therefore, when the phase current peak value of the compressor is too high, the operation of the compressor is stopped, and the prompt message is sent, so that the user can know the reason for stopping the operation of the compressor, and the abnormal condition of the compressor can be quickly processed.
In a further scheme, if the number of times of the phase current peak value of the compressor in a preset current peak value range does not exceed a preset number of times, and the phase current peak value of the compressor does not exceed an upper limit threshold value of the preset current peak value range in a preset time period, the operation state of the compressor is maintained.
Therefore, when the compressor is not in an abnormal condition, the running state of the compressor is maintained, the stable running of the compressor can be ensured, and the running stability of the air conditioner is improved.
In order to achieve the second objective, the air conditioner provided by the present invention includes a compressor, and further includes a circuit board, wherein the circuit board is provided with a processor and a memory, the memory stores a computer program, and the computer program implements the steps of the control method of the air conditioner when executed by the processor.
To achieve the third object, the present invention provides a computer-readable storage medium having a computer program stored thereon, the computer program, when being executed by a processor, implementing the steps of the control method of the air conditioner.
Drawings
Fig. 1 is a flowchart of an embodiment of a control method of an air conditioner according to the present invention.
Fig. 2 is an electrical schematic diagram for calculating the number of times that the phase current peak value of the compressor exceeds the lower limit threshold of the preset current peak value range in the control method embodiment of the air conditioner of the invention.
Fig. 3 is a waveform diagram of a method for controlling an air conditioner according to an embodiment of the present invention, in which the number of times that a phase current peak value of a compressor exceeds a lower threshold of a preset current peak value range is calculated.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
The control method of the air conditioner is applied to the variable frequency air conditioner, the variable frequency air conditioner is provided with the compressor and the circuit board, the circuit board is provided with the processor and the memory, the memory stores the computer program, and the processor executes the computer program to realize the control method of the air conditioner.
The embodiment of the control method of the air conditioner comprises the following steps:
after the air conditioner is powered on to operate, an operation instruction sent by the remote controller is received, and the air conditioner is operated according to a preset operation mode, such as a cooling mode or a heating mode. At the same time, the compressor starts running. Referring to fig. 1, after the compressor starts to operate, the air conditioner performs step S1, acquires a phase current peak value of the compressor according to a preset frequency, and records data of the acquired phase current peak value of the compressor. For example, if the carrier frequency of the compressor is f, the period of collecting the phase current peak value is 1/f, and thus the period of collecting the phase current peak value of the compressor is related to the carrier frequency of the compressor.
Then, step S2 is executed to determine whether the number of times that the phase current peak value of the compressor is within the preset current peak value range exceeds a preset number of times within a preset time period. In this embodiment, the preset time period is continuous for several seconds, for example, continuous for 5 seconds. Of course, in practical applications, the preset time period may be 10 seconds, 15 seconds, or the like.
In addition, in the present embodiment, an upper threshold and a lower threshold of the preset current peak range are preset, for example, the upper threshold is very close to or slightly larger than the recommended demagnetization protection current value of the compressor, generally, the recommended demagnetization protection current value of the compressor is described in the product specification of the compressor, and the recommended demagnetization protection current value of the compressor may be generally used as the current threshold for current protection of the hardware module. The lower threshold of the preset current peak value range should be about 2A to 3A smaller than the recommended demagnetization protection current value of the compressor, and therefore, the lower threshold of the preset current peak value range leaves a certain margin compared with the recommended demagnetization protection current value of the compressor.
When the phase current peak value of the compressor is within the preset current peak value range, it indicates that the phase current peak value of the compressor is high and is close to the demagnetization protection current value recommended by the compressor, and if the phase current of the compressor continues to increase, a situation that the phase current exceeds the demagnetization protection current value recommended by the compressor may occur, which may cause the air conditioner to send a fault prompt message.
The preset number M is a preset number, for example, the preset time period is X seconds, and the carrier frequency of the compressor is f, the preset number M needs to satisfy the following formula: m is more than or equal to 1 and less than or equal to X X f, wherein X X f is the total sampling times of the phase current of the compressor in a preset time period. Preferably, the value of the preset number M is a certain ratio of the total sampling number, for example, the value of the preset number M is 1/10 or 1/20 of the total sampling number.
Assuming that the preset number of times is 10, if the number of times that the phase current peak value of the compressor is within the preset current peak value range is 12 within the preset time period, the yes judgment result in step S2 indicates that the phase current peak value of the compressor has occurred a number of times close to the demagnetization protection current value recommended by the compressor in a short time, but does not mean that the compressor is in a fault, and therefore, the operating state of the compressor needs to be further judged, and specifically, step S3 is executed to judge whether the compressor is allowed to be in the torque compensation state. In this embodiment, if the operating frequency of the compressor is low, for example, the operating frequency is within the torque compensation interval, the compressor is considered to be operating in the torque compensation state. For example, when the operating frequency of the compressor is below 42 hz, the compressor may be considered to be currently operating in a torque compensation state.
The detection of whether the phase current peak value of the compressor is within the preset current peak value range can be implemented by comparing the phase current peak value of the compressor with a lower threshold of the preset current peak value range, comparing the phase current peak value of the compressor with an upper threshold of the preset current peak value range, and judging whether the phase current peak value of the compressor is within the preset current peak value range according to the comparison result. The comparison between the peak value of the phase current of the compressor and the lower threshold of the preset peak value range of the current can be realized by the comparison circuit shown in fig. 2.
Phase current peak U of compressorCOMPAfter passing through the sampling resistor RS and the filter circuit formed by the resistor R1 and the capacitor C1, the voltage is input to the inverting input terminal of the voltage comparator U1, and the forward input terminal of the voltage comparator U1 is connected to the reference voltage, i.e., the lower threshold of the preset current peak range. The voltage Uout output by the output terminal of the voltage comparator U1 is a high level signal or a low level signal, and the voltage output by the voltage comparator U1 is output to the controller 10 after passing through a filter circuit formed by a resistor R1 and a capacitor C1.
Specifically, when the phase current peak value of the compressor is smaller than the lower threshold of the preset current peak value range, the voltage output by the voltage comparator U1 is a high level signal, and when the phase current peak value of the compressor is larger than the lower threshold of the preset current peak value range, the voltage output by the voltage comparator U1 is a low level signal, that is, when the phase current peak value of the compressor is larger than the lower threshold of the preset current peak value range, the level signal output by the voltage comparator U1 is inverted to form a pulse signal, as shown in fig. 3. Therefore, the controller 10 only needs to record the number of the pulse signals, i.e. the number of times that the phase current peak value of the compressor exceeds the lower threshold of the preset current peak value range can be calculated.
With a similar circuit, that is, with another voltage comparison circuit, the number of times that the peak value of the phase current of the compressor exceeds the upper threshold of the preset peak value range of the current in the preset time period can be calculated. And, the controller 10 can calculate the number of times that the phase current peak value of the compressor is within the range of the preset current peak value within the preset time period according to the time sequence of the pulse signals output by the two comparison circuits. For example, at the same time, the compressor phase current peak value exceeds the lower threshold of the preset current peak value range, but does not exceed the upper threshold of the preset current peak value range, and it is considered that the compressor phase current peak value is within the preset current peak value range at the time.
Typically, when the compressor is operating in a torque compensation state, additional compensation current is provided to the compressor. If the current operation state of the compressor is the torque compensation state, which indicates that the current phase current peak value of the compressor is too high due to the supply of the compensation current to the compressor, step S4 is performed to decrease the compensation current of the compressor and increase the operation frequency of the compressor. Preferably, when the compensation current of the compressor is reduced, the compensation current is reduced at a predetermined rate, for example, at a predetermined rate. For example, if the current compensation current is 3A and the preset ratio is 10%, the reduced compensation current is 2.7A. When the operating frequency of the compressor is increased, the operating frequency of the compressor needs to be increased to exceed the upper threshold value of the torque compensation frequency interval. For example, if the upper threshold value of the torque compensation frequency interval in which the compressor is operated is 42 hz, the operating frequency of the compressor needs to be increased to exceed 42 hz when the operating frequency of the compressor is increased. However, if the operating frequency of the compressor is suddenly and greatly increased in a short time, the stability of the operation of the compressor is affected, so that when the operating frequency of the compressor is increased, the operating frequency of the compressor is only increased to a minimum frequency exceeding an upper limit threshold of the torque compensation frequency interval, for example, the operating frequency of the compressor is increased to 43 hertz. When the operating frequency of the compressor exceeds the upper limit threshold of the torque compensation frequency interval, the current compensation is needed to be carried out on the compressor, and the phase current peak value of the compressor is reduced.
If the result of the determination in step S3 is negative, it indicates that the phase current is high when the compressor is operated at a high frequency, and at this time, the operation state of the air conditioner needs to be adjusted to avoid the phase current of the compressor being too high, for example, step S5 is executed to increase the heat exchange efficiency of the air conditioner to reduce the load of the air conditioner and reduce the peak value of the phase current of the compressor. Specifically, if the air conditioner is operated in a refrigeration mode, the opening degree of the electronic expansion valve is not allowed to be reduced, the outdoor unit fan is forced to operate at a preset ultrahigh rotating speed, and the indoor unit fan is forced to operate at a preset ultralow wind speed. And if the air conditioner operates in the heating mode, the opening degree of the electronic expansion valve is not allowed to be reduced, the outdoor unit fan is forced to operate or stop operating according to the preset ultra-low rotating speed, and the indoor unit fan is forced to operate according to the preset ultra-high wind speed.
Next, step S8 is executed to determine whether the air conditioner stops operating, and if the air conditioner does not stop operating, the method returns to step S1, continues to sample the phase current peak value of the compressor, and determines whether the number of times that the phase current peak value of the compressor is within the preset current peak value range exceeds a preset number of times within a preset time period.
If the judgment result in the step S2 is no, step S6 is executed to judge whether the phase current peak value of the compressor exceeds the upper limit threshold of the preset current peak value range within the preset time period, if yes, indicating that the phase current peak value of the compressor is too high, step S7 is executed to stop the operation of the compressor and send a fault prompt message, for example, a prompt message of module circuit protection fault, so that a user can know the reason why the compressor stops operating, and the user can timely remove the fault.
If the judgment result in the step S6 is negative, it indicates that the phase current peak value of the compressor is low in the preset time period, the condition that the phase current peak value exceeds the upper threshold of the preset current peak value range does not occur, and the number of times that the phase current peak value exceeds the lower threshold of the preset current peak value range is also small, so that the compressor can continue to maintain the current operation state, and the step S8 is executed, and when the air conditioner does not stop operating, the operation returns to the step S1, and the phase current peak value of the compressor continues to be monitored.
In the embodiment, the phase current peak value of the compressor is monitored, and once the situation that the phase current peak value of the compressor is close to the demagnetization protection current value recommended by the compressor for many times in a short time occurs, protective measures are taken for the compressor, such as reducing the compensation current of the compressor, increasing the operation frequency of the compressor, or increasing the heat exchange efficiency of the air conditioner, so that the situation that the compressor stops operating due to the fact that the phase current of the compressor continues to increase is avoided, and the normal operation of the air conditioner is prevented from being influenced due to the fact that the compressor stops operating.
The embodiment of the air conditioner is as follows:
the air conditioner of the embodiment is an inverter air conditioner, the inverter air conditioner is provided with a compressor, the running frequency of the compressor is adjusted according to the actual working condition, a circuit board is further arranged in the air conditioner, a processor and a memory are arranged on the circuit board, a computer program capable of running on the processor is stored in the memory, and each step of the control method of the air conditioner is realized when the processor executes the computer program.
For example, a computer program may be partitioned into one or more modules that are stored in a memory and executed by a processor to implement the modules of the present invention. One or more of the modules may be a sequence of computer program instruction segments capable of performing certain functions and describing the execution of the computer program in the processor.
The Processor may be a Central Processing Unit (CPU), or may be other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the appliance and connected to the various parts of the overall appliance by various interfaces and lines.
The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the appliance by operating or executing the computer programs and/or modules stored in the memory and calling data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the appliance, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Computer-readable storage medium embodiments:
the computer program stored in the memory of the remote control may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, all or part of the flow in the method according to the above embodiment may be implemented by a computer program, which may be stored in a computer readable storage medium and used by a processor to implement the steps of the control method of the air conditioner.
Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
Finally, it should be emphasized that the present invention is not limited to the above-mentioned embodiments, such as the variation of the sampling frequency of the peak value of the phase current of the compressor, or the variation of the upper threshold value and the lower threshold value of the preset peak value range of the current, and these variations should also be included in the protection scope of the present invention.
Claims (12)
1. A control method for an air conditioner, comprising:
the method comprises the steps of obtaining a phase current peak value of the compressor, judging whether the frequency of the phase current peak value of the compressor in a preset current peak value range exceeds a preset frequency within a preset time period, if so, further judging whether the compressor operates in a torque compensation state, and if the compressor operates in the torque compensation state, reducing the compensation current of the compressor and increasing the operation frequency of the compressor.
2. The control method of an air conditioner according to claim 1, wherein:
determining whether the compressor is operating in a torque compensation state comprises: judging whether the operating frequency of the compressor is within the range of the torque compensation frequency interval or not;
increasing the operating frequency of the compressor comprises: increasing the operating frequency of the compressor to exceed an upper threshold of the torque compensation frequency interval.
3. The control method of an air conditioner according to claim 2, wherein:
increasing the operating frequency of the compressor beyond an upper threshold of the torque compensation frequency interval comprises: increasing the operating frequency of the compressor to a minimum frequency that exceeds an upper threshold of the torque compensation frequency interval.
4. The control method of an air conditioner according to any one of claims 1 to 3, wherein:
reducing the compensation current of the compressor comprises: reducing the compensation current of the compressor according to a preset proportion.
5. The control method of an air conditioner according to any one of claims 1 to 3, wherein:
and if the times of the phase current peak value of the compressor in the preset current peak value range exceed the preset times, but the compressor is not operated in the torque compensation state, the heat exchange efficiency of the air conditioner is increased.
6. The control method of an air conditioner according to claim 5, wherein:
increasing the heat exchange efficiency of the air conditioner includes: and if the air conditioner operates in a refrigeration mode, forbidding to reduce the opening degree of the electronic expansion valve, operating the outdoor unit fan at a preset ultrahigh rotating speed, and operating the indoor unit fan at a preset ultralow rotating speed.
7. The control method of an air conditioner according to claim 5, wherein:
increasing the heat exchange efficiency of the air conditioner includes: and if the air conditioner operates in the heating mode, forbidding to reduce the opening degree of the electronic expansion valve, operating the outdoor unit fan at a preset ultra-low rotating speed or stopping the operation, and operating the indoor unit fan at a preset ultra-high rotating speed.
8. The control method of an air conditioner according to any one of claims 1 to 3, wherein:
if the frequency of the compressor phase current peak value in a preset current peak value range does not exceed a preset frequency, further judging whether the compressor phase current peak value exceeds an upper limit threshold value of the preset current peak value range in the preset time period, if so, stopping the operation of the compressor.
9. The control method of an air conditioner according to claim 8, wherein:
and when the compressor stops running, the prompt message of module circuit protection fault is sent.
10. The control method of an air conditioner according to claim 8, wherein:
and if the frequency of the phase current peak value of the compressor in a preset current peak value range does not exceed a preset frequency and the phase current peak value of the compressor does not exceed an upper limit threshold value of the preset current peak value range in the preset time period, maintaining the running state of the compressor.
11. Air conditioner, including the compressor, characterized in that, the air conditioner also includes the circuit board, is provided with treater and memory on the circuit board, the memory stores the computer program, the computer program realizes each step of the control method of air conditioner according to any one of claim 1 to 10 when being executed by the treater.
12. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program, when executed by a processor, implements the steps of the control method of the air conditioner according to any one of claims 1 to 10.
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| CN114347758B (en) * | 2021-04-01 | 2024-08-02 | 长城汽车股份有限公司 | Control method for automobile air conditioner compressor |
| CN113719969B (en) * | 2021-08-04 | 2023-02-17 | Tcl空调器(中山)有限公司 | Air conditioner protection method, device, equipment and computer readable storage medium |
| CN114151932B (en) * | 2021-11-22 | 2023-04-18 | 青岛海信日立空调系统有限公司 | Energy consumption monitoring platform of multi-split system |
| CN114294781B (en) * | 2021-12-23 | 2023-01-31 | 珠海格力电器股份有限公司 | Compressor protection method and device, air conditioning unit and storage medium |
| CN114499352B (en) * | 2022-02-23 | 2023-11-21 | 深圳市振邦智能科技股份有限公司 | Compressor phase current peak suppression method, system and related equipment |
| CN115289733A (en) * | 2022-07-08 | 2022-11-04 | 北京小米移动软件有限公司 | Torque compensation control method, device and storage medium |
| CN115095968B (en) * | 2022-07-08 | 2024-06-18 | 北京小米移动软件有限公司 | Torque compensation control method, device and storage medium |
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