WO2024244580A1 - 用于空调器的控制方法、装置及空调器、存储介质 - Google Patents

用于空调器的控制方法、装置及空调器、存储介质 Download PDF

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Publication number
WO2024244580A1
WO2024244580A1 PCT/CN2024/080314 CN2024080314W WO2024244580A1 WO 2024244580 A1 WO2024244580 A1 WO 2024244580A1 CN 2024080314 W CN2024080314 W CN 2024080314W WO 2024244580 A1 WO2024244580 A1 WO 2024244580A1
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WO
WIPO (PCT)
Prior art keywords
carrier frequency
fluctuation range
air conditioner
motor speed
speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2024/080314
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English (en)
French (fr)
Inventor
史为品
刘聚科
高保华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Smart Technology R&D Co Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Smart Technology R&D Co Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Filing date
Publication date
Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Qingdao Haier Smart Technology R&D Co Ltd, Qingdao Haier Air Conditioning Electric Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Publication of WO2024244580A1 publication Critical patent/WO2024244580A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/024—Compressor control by controlling the electric parameters, e.g. current or voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0253—Compressor control by controlling speed with variable speed
    • 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

Definitions

  • the present application relates to the technical field of air conditioners, for example, to a control method and device for an air conditioner, an air conditioner, and a storage medium.
  • Air conditioner noise can be divided into mechanical noise and electromagnetic noise, and electromagnetic noise is closely related to the switching process of the inverter.
  • the relevant technology proposes a method for controlling the carrier frequency of an air conditioner, including: obtaining the compressor speed of the air conditioner in real time; comparing the compressor speed with the preset speed; if the compressor speed is lower than the preset speed, setting the carrier frequency of the air conditioner to a first preset carrier frequency; and, if the compressor speed is higher than or equal to the preset speed, setting the carrier frequency of the air conditioner to a second preset carrier frequency; wherein the second preset carrier frequency is greater than the first preset carrier frequency.
  • the relevant technology uses a low carrier frequency when the compressor speed is low to reduce the module's opening and closing losses and reduce the module's heat generation; when the compressor speed is high, a high carrier frequency is used to reduce compressor noise, reduce compressor heat generation, and improve the system's control performance and stability.
  • the inverter in the related technology works at a fixed carrier frequency for a period of time.
  • PWM Pulse Width Modulation
  • the air gap magnetic field generated by these high-frequency current harmonics will further interact with other air gap harmonics to generate high-frequency electromagnetic forces.
  • These electromagnetic forces will cause high-frequency electromagnetic vibrations and noise.
  • the harmonic frequencies of these electromagnetic forces are consistent with the frequency of the motor mechanical structure, resonance will occur, causing greater noise, which is not conducive to the stability of the air conditioner operation.
  • the embodiments of the present disclosure provide a control method, device, air conditioner, and storage medium for an air conditioner, which can take into account both the suppression of air conditioner noise and the suppression of inverter losses, and can avoid resonance of the motor, which is beneficial to improving the stability of the air conditioner operation.
  • the method includes: obtaining the motor speed and the motor speed change trend; determining the fluctuation range of the carrier frequency according to the motor speed and the motor speed change trend; controlling the frequency converter to randomly take values within the fluctuation range and periodically adjust the carrier frequency.
  • the device includes: a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned control method for the air conditioner when running the program instructions.
  • the air conditioner includes: an air conditioner body, which is provided with a motor and a frequency converter; and the above-mentioned control device for the air conditioner is installed in the air conditioner body.
  • the storage medium stores program instructions, and when the program instructions are run, the above-mentioned control method for the air conditioner is executed.
  • control method, device, air conditioner, and storage medium for an air conditioner provided in the embodiments of the present disclosure can achieve the following technical effects:
  • the current operating condition of the air conditioner is grasped by obtaining the motor speed and the motor speed change trend, and the fluctuation range of the carrier frequency is set accordingly, so as to control the frequency converter to randomly take values within the fluctuation range and periodically adjust the carrier frequency. Therefore, the disclosed embodiment can avoid the fixed operation of the carrier frequency of the frequency converter, and make the carrier frequency fluctuate randomly within a reasonable range, so as to take into account the suppression of the air conditioner noise and the suppression of the frequency converter loss, and can avoid the resonance phenomenon between the motor and the frequency converter, which is conducive to improving the stability of the air conditioner operation.
  • FIG1 is a schematic diagram of a control method for an air conditioner provided by an embodiment of the present disclosure
  • FIG2 is a schematic diagram of another control method for an air conditioner provided by an embodiment of the present disclosure.
  • FIG3 is a schematic diagram of another control method for an air conditioner provided by an embodiment of the present disclosure.
  • FIG4 is a schematic diagram of another control method for an air conditioner provided by an embodiment of the present disclosure.
  • FIG5 is a schematic diagram of a control device for an air conditioner provided by an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of an air conditioner provided in an embodiment of the present disclosure.
  • the character "/" indicates that the preceding and following objects are in an "or" relationship.
  • A/B indicates: A or B.
  • a and/or B means: A or B, or, A and B.
  • correspondence may refer to an association relationship or a binding relationship.
  • correspondence between A and B means that there is an association relationship or a binding relationship between A and B.
  • Air conditioner noise can be divided into mechanical noise and electromagnetic noise, and electromagnetic noise is closely related to the switching process of the inverter.
  • the relevant technology proposes a method for controlling the carrier frequency of an air conditioner, including: obtaining the compressor speed of the air conditioner in real time; comparing the compressor speed with the preset speed; if the compressor speed is lower than the preset speed, setting the carrier frequency of the air conditioner to a first preset carrier frequency; and, if the compressor speed is higher than or equal to the preset speed, setting the carrier frequency of the air conditioner to a second preset carrier frequency; wherein the second preset carrier frequency is greater than the first preset carrier frequency.
  • the relevant technology uses a low carrier frequency when the compressor speed is low to reduce the module's opening and closing losses and reduce the module's heat generation; when the compressor speed is high, a high carrier frequency is used to reduce compressor noise, reduce compressor heat generation, and improve the system's control performance and stability.
  • the inverter in the related art works at a fixed carrier frequency for a period of time, and PWM will generate high-frequency current harmonics near the switching frequency in the motor current waveform.
  • the air gap magnetic field generated by these high-frequency current harmonics will further interact with other air gap harmonics to generate high-frequency electromagnetic forces, which will cause high-frequency electromagnetic vibration and noise.
  • the harmonic frequency of these electromagnetic forces is consistent with the resonant frequency of the motor mechanical structure, it will cause greater noise.
  • an embodiment of the present disclosure provides a control method for an air conditioner, including:
  • S101 The processor obtains the motor speed and the motor speed change trend.
  • the processor determines a fluctuation range of the carrier frequency according to the motor speed and the motor speed change trend.
  • the processor controls the frequency converter to randomly select values within the fluctuation range and periodically adjust the carrier frequency.
  • the control method for an air conditioner provided by the embodiment of the present disclosure is adopted to grasp the current operating condition of the air conditioner by obtaining the motor speed and the motor speed change trend, and accordingly set the fluctuation range of the carrier frequency to control the inverter to randomly take values within the fluctuation range and periodically adjust the carrier frequency.
  • the embodiment of the present disclosure can avoid the fixed operation of the carrier frequency of the inverter, and make the carrier frequency fluctuate randomly within a reasonable range, so as to take into account the suppression of the noise of the air conditioner and the suppression of the loss of the inverter, and can avoid the resonance phenomenon between the motor and the inverter, which is conducive to improving the stability of the operation of the air conditioner.
  • the processor determines the fluctuation range of the carrier frequency according to the motor speed and the motor speed change trend, including: the processor determines the speed threshold according to the motor speed change trend; the processor determines the fluctuation range of the carrier frequency according to the motor speed and the speed threshold.
  • the embodiment of the present disclosure can set a suitable speed threshold in combination with the motor speed change trend, and determine the fluctuation range of the carrier frequency by comparing the motor speed with the speed threshold, so that the value of the carrier frequency can meet the actual operating conditions of the motor, which is conducive to taking into account both the suppression of air conditioner noise and the suppression of inverter losses.
  • the processor determines the speed threshold value according to the trend of the motor speed change, including: when the motor speed change trend indicates an increase in speed, the processor determines the speed threshold value to be a first speed threshold value; or, when the motor speed change trend indicates a decrease in speed, the processor determines the speed threshold value to be a second speed threshold value.
  • the first speed threshold value is greater than the second speed threshold value.
  • the embodiment of the present disclosure sets a slightly smaller second speed threshold value, and ensures that the motor speed can accurately reach the target speed by giving a certain decrease margin, which is conducive to more accurately distinguishing between the low speed and high speed states when the motor speeds down.
  • the processor determines the fluctuation range of the carrier frequency according to the motor speed and the speed threshold, including: when the motor speed is less than the first speed threshold, the processor determines the fluctuation range of the carrier frequency to be the first fluctuation range; or, when the motor speed is greater than or equal to the first speed threshold, the processor determines the fluctuation range of the carrier frequency to be the second fluctuation range.
  • the processor determines the fluctuation range of the carrier frequency according to the motor speed and the speed threshold, including: when the motor speed is less than the first speed threshold, the processor determines the fluctuation range of the carrier frequency to be the first fluctuation range; or, when the motor speed is greater than or equal to the first speed threshold, the processor determines the fluctuation range of the carrier frequency to be the second fluctuation range.
  • the carrier frequency fluctuation range is determined to be the second fluctuation range.
  • the embodiment of the present disclosure can distinguish the low speed and high speed states under the condition of motor speed increase, and set the corresponding first fluctuation range and second fluctuation range accordingly.
  • the embodiment of the present disclosure can take into account the differences in inverter loss problems and air conditioner noise problems corresponding to different speed states under speed increase, and by making the carrier frequency randomly take values within the corresponding fluctuation range and periodically adjust it, it can take into account both the suppression of air conditioner noise and the suppression of inverter loss.
  • the processor determines the fluctuation range of the carrier frequency according to the motor speed and the speed threshold, including: when the motor speed is less than the second speed threshold, the processor determines the fluctuation range of the carrier frequency to be the third fluctuation range; or, when the motor speed is greater than or equal to the second speed threshold, the processor determines the fluctuation range of the carrier frequency to be the fourth fluctuation range.
  • the embodiment of the present disclosure can distinguish between the low speed and high speed states under the condition of motor deceleration, and set the corresponding third fluctuation range and fourth fluctuation range accordingly.
  • the embodiment of the present disclosure can take into account the differences in the inverter loss problem and the air conditioner noise problem corresponding to different speed states under the deceleration condition, and by making the carrier frequency randomly take values within the corresponding fluctuation range and periodically adjust, it can take into account both the suppression of air conditioner noise and the suppression of inverter loss.
  • the processor controls the frequency converter to randomly select values within the fluctuation range and periodically adjust the carrier frequency, including: at each preset period, the processor randomly selects a target carrier frequency within the fluctuation range; the processor controls the switching frequency of the power module of the frequency converter to respond to the target carrier frequency.
  • the embodiment of the present disclosure can randomly adjust the current carrier frequency within the fluctuation range at each preset period, thereby realizing dynamic adjustment of the switching frequency of the power module, thereby avoiding the motor resonance problem that may be caused by the fixed operation of the carrier frequency of the frequency converter, which is conducive to improving the stability of the operation of the air conditioner.
  • the power module of the inverter is an IGBT (Insulated Gate Bipolar Transistor).
  • the power module may also be other power switching devices that can achieve similar functions, and the embodiments of the present disclosure do not specifically limit this.
  • the embodiments of the present disclosure can adjust the switching frequency of the IGBT, and thus can control the number of switching times of the IGBT in the corresponding cycle. The higher the switching frequency, the more switching times of the IGBT, the better the smoothness of the current waveform, the less heat generated by the motor, and the smaller the motor noise, but the greater the electromagnetic interference to other equipment, and the switching loss of the IGBT increases, which may affect the normal operation of the air conditioner.
  • the disclosed embodiment randomly selects the target carrier frequency within the fluctuation range and adaptively adjusts the IGBT switching frequency, which can take into account the suppression of air conditioner noise and inverter loss, and ultimately achieves lower air conditioner noise and lower inverter switching loss.
  • the current waveform has better smoothness and can effectively reduce electromagnetic interference to other equipment.
  • the preset period can be set in combination with motor-related parameters to better avoid resonance between the motor and the inverter.
  • the preset period is 2ms.
  • the preset period can also be adjusted according to the actual needs of the user and set to any other value within a reasonable range such as 1ms or 5ms.
  • the motor may be a compressor motor, and the frequency converter is used to adjust the compressor speed and operating frequency.
  • the fan motor is a fan motor, and the frequency converter is used to adjust the fan speed.
  • the embodiment of the present disclosure provides another control method for an air conditioner, including:
  • S201 The processor obtains the motor speed and the motor speed change trend.
  • the processor controls the frequency converter to randomly select values within the fluctuation range and periodically adjust the carrier frequency.
  • the control method for an air conditioner provided by the embodiment of the present disclosure is adopted to grasp the current operating condition of the air conditioner by obtaining the motor speed and the motor speed change trend, and to set a suitable speed threshold in combination with the motor speed change trend, and then to determine the fluctuation range of the carrier frequency by comparing the motor speed with the speed threshold, so as to control the inverter to randomly take values within a suitable fluctuation range and periodically adjust the carrier frequency.
  • the embodiment of the present disclosure can avoid the fixed operation of the carrier frequency of the inverter, and make the carrier frequency fluctuate randomly within a reasonable range, so as to take into account the suppression of the noise of the air conditioner and the suppression of the loss of the inverter, and can avoid the resonance phenomenon between the motor and the inverter, which is conducive to improving the stability of the operation of the air conditioner.
  • the first speed threshold and the second speed threshold can be set in combination with the preset speed threshold.
  • the first speed threshold is greater than the preset speed threshold, and the second speed threshold is less than the preset speed threshold.
  • the preset speed threshold is 500rpm.
  • a first speed threshold that is larger than the preset speed threshold is set.
  • the embodiment of the present disclosure can give a certain rise margin to ensure that the motor speed can accurately reach the target speed, which is conducive to more accurately distinguishing the low speed and high speed states when the motor speeds up, and then can more accurately limit the fluctuation range of the carrier frequency in combination with the actual speed of the motor.
  • a second speed threshold that is smaller than the preset speed threshold is set.
  • the embodiment of the present disclosure can give a certain fall margin to ensure that the motor speed can accurately reach the target speed, which is conducive to more accurately distinguishing the low speed and high speed states when the motor speeds down, and can also more accurately limit the fluctuation range of the carrier frequency in combination with the actual speed of the motor.
  • the first speed threshold can be adjusted according to the motor speed increase rate.
  • the first speed threshold can be set slightly larger to provide a more appropriate rise margin, which is conducive to more accurately limiting the fluctuation range of the carrier frequency.
  • the first speed threshold is 560 rpm.
  • the first speed threshold can also be adjusted according to actual needs of users and adjusted to any other value within a reasonable range.
  • the second speed threshold can be adjusted according to the motor deceleration rate.
  • the second speed threshold can be set slightly smaller to provide a more appropriate drop margin, which is conducive to more accurately limiting the fluctuation range of the carrier frequency.
  • the second speed threshold is 440rpm.
  • the second speed threshold can also be adjusted according to the actual needs of the user and adjusted to any other value within a reasonable range.
  • the first fluctuation range is different from the second fluctuation range.
  • the embodiment of the present disclosure fully considers the difference between the inverter loss problem and the air conditioner noise problem in the two states, and by setting different carrier frequency fluctuation ranges respectively, it is possible to more accurately achieve the suppression of air conditioner noise and inverter loss.
  • the upper limit value of the first fluctuation range is less than the upper limit value of the second fluctuation range
  • the lower limit value of the first fluctuation range is less than the lower limit value of the second fluctuation range.
  • the embodiment of the present disclosure can set the second fluctuation range with a relatively larger carrier frequency value, so as to better suppress the air conditioner noise problem.
  • the noise problem is not prominent, and the embodiment of the present disclosure sets the first fluctuation range with a relatively smaller carrier frequency value, so as to better suppress the inverter loss. Therefore, the embodiment of the present disclosure can take into account the suppression of air conditioner noise and the suppression of inverter loss, which is conducive to improving the stability of air conditioner operation.
  • the third fluctuation range is different from the fourth fluctuation range.
  • the embodiment of the present disclosure fully considers the difference between the inverter loss problem and the air conditioner noise problem in the two states, and by setting different carrier frequency fluctuation ranges respectively, it is possible to more accurately achieve the suppression of air conditioner noise and the suppression of inverter loss.
  • the upper limit value of the third fluctuation range is less than the upper limit value of the fourth fluctuation range
  • the lower limit value of the third fluctuation range is less than the lower limit value of the fourth fluctuation range.
  • the embodiment of the present disclosure can set the fourth fluctuation range with a relatively larger carrier frequency value, which is conducive to better suppressing the noise problem of the air conditioner.
  • the embodiment of the present disclosure sets the third fluctuation range with a relatively smaller carrier frequency value, which is conducive to better suppressing the inverter loss. Therefore, the embodiment of the present disclosure can take into account the suppression of air conditioner noise and the suppression of inverter loss, which is conducive to improving the stability of air conditioner operation.
  • the first fluctuation range is the same as the third fluctuation range.
  • the disclosed embodiment can simplify the control, which is conducive to reducing the difficulty of implementing the control and the control cost.
  • the second fluctuation range is the same as the fourth fluctuation range.
  • the embodiment of the present disclosure can simplify the control, which is conducive to reducing the difficulty of implementing the control and the control cost.
  • the first fluctuation range can be adjusted according to the detected real-time noise of the air conditioner.
  • the upper limit and lower limit of the first fluctuation range are positively correlated with the noise decibel value.
  • the upper limit and lower limit of the first fluctuation range can be set slightly higher to make the random value of the carrier frequency relatively larger, which is conducive to better suppressing the noise of the air conditioner. Noise problem.
  • the first fluctuation range is [14KHz, 18KHz].
  • the first fluctuation range can also be adjusted according to the actual needs of the user and adjusted to any other reasonable range.
  • the second fluctuation range can be adjusted according to the detected real-time temperature of the power module.
  • the upper limit value and the lower limit value of the second fluctuation range are negatively correlated with the temperature value of the power module.
  • the upper limit value and the lower limit value of the second fluctuation range can be set slightly lower to make the random value of the carrier frequency relatively smaller, which is conducive to better suppressing the loss of the inverter.
  • the second fluctuation range is [18KHz, 22KHz].
  • the second fluctuation range can also be adjusted according to the actual needs of the user and adjusted to any other reasonable range.
  • the third fluctuation range can be adjusted according to the detected real-time noise of the air conditioner.
  • the upper limit and lower limit of the third fluctuation range are positively correlated with the noise decibel value.
  • the upper limit and lower limit of the third fluctuation range can be set slightly higher to make the random value of the carrier frequency relatively larger, which is conducive to better suppressing the noise problem of the air conditioner.
  • the third fluctuation range is [14KHz, 18KHz].
  • the third fluctuation range can also be adjusted according to the actual needs of the user and adjusted to any other reasonable range.
  • the fourth fluctuation range can be adjusted according to the detected real-time temperature of the power module.
  • the upper limit value and the lower limit value of the fourth fluctuation range are negatively correlated with the temperature value of the power module.
  • the upper limit value and the lower limit value of the fourth fluctuation range can be set slightly lower to make the random value of the carrier frequency relatively smaller, which is conducive to better suppressing the loss of the inverter.
  • the fourth fluctuation range is [18KHz, 22KHz].
  • the fourth fluctuation range can also be adjusted according to the actual needs of the user and adjusted to any other reasonable range.
  • the embodiment of the present disclosure provides another control method for an air conditioner, including:
  • S301 The processor obtains the motor speed and the motor speed change trend.
  • S302 The processor determines a fluctuation range of the carrier frequency according to the motor speed and the motor speed change trend.
  • the processor controls the frequency converter to randomly select values within the fluctuation range and periodically adjust the carrier frequency.
  • S304 The processor calculates the average value of the carrier frequency randomly selected within a preset time length to obtain an average carrier frequency.
  • S305 The processor adjusts the carrier frequency value strategy according to the average carrier frequency and the reference carrier frequency corresponding to the fluctuation range.
  • the control method for an air conditioner provided by the embodiment of the present disclosure is used to grasp the current operating condition of the air conditioner by obtaining the motor speed and the trend of the motor speed change, and the fluctuation range of the carrier frequency is set accordingly to control the frequency converter to randomly take values within the fluctuation range and periodically adjust the carrier frequency.
  • the embodiment of the present disclosure can avoid the fixed operation of the carrier frequency of the frequency converter, and make the carrier frequency fluctuate randomly within a reasonable range, so as to take into account both the suppression of the air conditioner noise and the suppression of the frequency converter loss, and avoid the resonance between the motor and the frequency converter, which is beneficial to improving the stability of the air conditioner operation.
  • the embodiment of the present disclosure calculates the average value of the randomly taken carrier frequency within the preset period of time, and compares it with the reference carrier frequency corresponding to the fluctuation range.
  • the disclosed embodiment can determine whether the random value of the carrier frequency within a preset time period is appropriate, and then optimize the carrier frequency value strategy based on the determination result, so as to ensure the stability of the subsequent operation process of the air conditioner.
  • the preset time length can be set in combination with the inverter related parameters to suppress the inverter loss in a more timely manner.
  • the preset time length is 1s.
  • the preset time length can also be adjusted according to the actual needs of the user and set to any other value within a reasonable range such as 0.5s or 2s.
  • the processor calculates the average value of the carrier frequency randomly selected within a preset time length to obtain the average carrier frequency, including: the processor calculates Get the average carrier frequency Wherein, Xi is the carrier frequency of the ith random value, and n is the number of random values of the carrier frequency within the preset duration, which can be obtained by comparing the preset duration with the preset period.
  • the embodiment of the present disclosure can accurately obtain the average value of the carrier frequency of the random value within the preset duration, which is conducive to judging whether the random value of the carrier frequency within the preset duration is appropriate.
  • Xmax is the upper limit of the fluctuation range
  • Xmin is the lower limit of the fluctuation range.
  • the reference carrier frequency of the fluctuation range is the average value of the upper limit and the lower limit of the fluctuation range, that is, the embodiment of the present disclosure performs random value taking within the fluctuation range around the reference carrier frequency.
  • the reference carrier frequency can reflect the size of the random value of the carrier frequency.
  • the larger the reference carrier frequency the larger the random value of the carrier frequency, which is conducive to better suppressing the noise problem of the air conditioner.
  • the smaller the reference carrier frequency the smaller the random value of the carrier frequency, which is conducive to better suppressing the loss of the inverter.
  • the processor adjusts the carrier frequency value strategy according to the average carrier frequency and the reference carrier frequency corresponding to the fluctuation range, including: when the average carrier frequency is less than the reference carrier frequency corresponding to the fluctuation range, the processor maintains the current carrier frequency value strategy; or, when the average carrier frequency is greater than or equal to the reference carrier frequency corresponding to the fluctuation range, the processor modifies the current carrier frequency value strategy.
  • the processor modifies the current carrier frequency value strategy.
  • the embodiment of the present disclosure maintains the current carrier frequency value strategy to ensure the stability of the subsequent operation process of the air conditioner.
  • the average carrier frequency is greater than or equal to the reference carrier frequency corresponding to the fluctuation range, it indicates that the random value of the carrier frequency within the preset time length is too large, and the inverter temperature rise is large at this time, and the loss of its power module is large, which may affect the normal operation of the air conditioner.
  • the embodiment of the present disclosure promptly modifies the current carrier frequency value strategy to ensure the stability of the subsequent operation process of the air conditioner.
  • the embodiment of the present disclosure can determine whether the random value of the carrier frequency within the preset time length is appropriate, and then optimize the carrier frequency value strategy based on the judgment result, so as to ensure the stability of the subsequent operation process of the air conditioner.
  • the embodiment of the present disclosure may also introduce a correction coefficient to more accurately adjust the carrier frequency value strategy.
  • the processor maintains the current carrier frequency value strategy.
  • the processor corrects the current carrier frequency value strategy.
  • the embodiment of the present disclosure can adjust the triggering difficulty of the carrier frequency value correction scheme, which is beneficial to optimize the carrier frequency value strategy in combination with actual working conditions, so as to ensure the stability of the subsequent operation process of the air conditioner.
  • the correction coefficient a can be set according to the detected real-time temperature of the power module.
  • the correction coefficient a can be set slightly lower to more easily trigger the carrier frequency value correction scheme, which is conducive to timely suppressing the inverter loss to ensure the stability of the subsequent operation of the air conditioner.
  • the correction coefficient a is 1.00.
  • the correction coefficient a can also be adjusted according to the actual needs of the user and set to any other value within a reasonable range such as 0.95 or 1.05.
  • the embodiment of the present disclosure provides another control method for an air conditioner, including:
  • the processor obtains the motor speed and the motor speed change trend.
  • the processor determines a fluctuation range of the carrier frequency according to the motor speed and the motor speed change trend.
  • the processor controls the frequency converter to randomly select values within the fluctuation range and periodically adjust the carrier frequency.
  • S404 The processor calculates the average value of the carrier frequency randomly selected within a preset time length to obtain an average carrier frequency.
  • the control method for an air conditioner provided by the embodiment of the present disclosure is adopted to grasp the current operating condition of the air conditioner by obtaining the motor speed and the motor speed change trend, and the fluctuation range of the carrier frequency is set accordingly, so as to control the frequency converter to randomly take values within the fluctuation range and periodically adjust the carrier frequency.
  • the embodiment of the present disclosure can avoid the fixed operation of the carrier frequency of the frequency converter, and make the carrier frequency fluctuate randomly within a reasonable range, so as to take into account the suppression of the noise of the air conditioner and the suppression of the loss of the frequency converter, and avoid the resonance phenomenon between the motor and the frequency converter, which is conducive to improving the stability of the operation of the air conditioner.
  • the embodiment of the present disclosure calculates the average value of the carrier frequency of the random value within the preset time, and by comparing it with the reference carrier frequency corresponding to the fluctuation range, the embodiment of the present disclosure can determine whether the random value of the carrier frequency within the preset time is appropriate. If the average carrier frequency is less than the reference carrier frequency corresponding to the fluctuation range, the random value of the carrier frequency within the preset time is more reasonable, which can well take into account the suppression of the noise of the air conditioner and the suppression of the loss of the frequency converter. Therefore, the embodiment of the present disclosure maintains the current value strategy of the carrier frequency to ensure the stability of the subsequent operation process of the air conditioner.
  • the embodiment of the present disclosure promptly corrects the current value strategy of the carrier frequency to ensure the stability of the subsequent operation process of the air conditioner.
  • the processor corrects the current value strategy of the carrier frequency, including: the processor determines a value correction scheme according to the motor speed and the motor speed change trend; the processor corrects the current value strategy of the carrier frequency according to the value correction scheme.
  • the processor determines a value correction scheme according to the motor speed and the motor speed change trend; the processor corrects the current value strategy of the carrier frequency according to the value correction scheme.
  • the value correction scheme includes: the processor controls the carrier frequency to randomly take values within a new fluctuation range and adjusts it periodically.
  • the operation of the air conditioner is relatively unstable.
  • the embodiment of the present disclosure controls the carrier frequency to randomly take values within a new and more appropriate fluctuation range and adjusts it periodically, which can adaptively reduce the random value size of the carrier frequency to avoid overheating of the power module and increased switching losses caused by increased inverter temperature rise. Therefore, by setting a suitable new fluctuation range, the embodiment of the present disclosure can further suppress the inverter loss when the air conditioner is running relatively unstable, which is beneficial to improving the stability of the subsequent operation process of the air conditioner.
  • the processor determines a new fluctuation range in the following manner, including: the processor determines the upper limit value, lower limit value and reference carrier frequency corresponding to the new fluctuation range according to the difference between the average carrier frequency corresponding to the fluctuation range and the reference carrier frequency.
  • the difference is negatively correlated with the upper limit value, lower limit value and reference carrier frequency corresponding to the new fluctuation range.
  • the embodiment of the present disclosure can judge the degree of instability of the air conditioner operation according to the difference between the average carrier frequency and the reference carrier frequency corresponding to the original fluctuation range.
  • the larger the difference the greater the temperature rise of the inverter, the greater the loss of its power module, and the greater the possibility of unexpected shutdown of the air conditioner.
  • the embodiment of the present disclosure sets a smaller carrier frequency fluctuation range to improve the stability of the subsequent operation process of the air conditioner.
  • the value correction scheme includes: the processor controls the carrier frequency to operate at a fixed carrier frequency.
  • the processor controls the carrier frequency to operate at a suitable fixed carrier frequency, which can quickly reduce the value of the carrier frequency to better avoid overheating of the power module and increased switching losses caused by increased inverter temperature rise. Therefore, by setting a suitable fixed carrier frequency, the disclosed embodiment can suppress inverter losses more quickly when the air conditioner operates more unstably, which is beneficial to improving the stability of the subsequent operation process of the air conditioner.
  • the processor determines the fixed carrier frequency in the following manner, including: the processor determines the fixed carrier frequency according to the fluctuation range corresponding to The difference between the average carrier frequency and the reference carrier frequency is used to determine the fixed carrier frequency.
  • the difference is negatively correlated with the fixed carrier frequency.
  • the embodiment of the present disclosure can judge the degree of instability of the air conditioner operation according to the difference between the average carrier frequency and the reference carrier frequency corresponding to the original fluctuation range. The larger the difference, the greater the temperature rise of the inverter, the greater the loss of its power module, and the greater the possibility of unexpected shutdown of the air conditioner.
  • the embodiment of the present disclosure sets a smaller fixed carrier frequency to improve the stability of the subsequent operation of the air conditioner.
  • the processor determines a value correction scheme for the carrier frequency according to the motor speed and the motor speed change trend, including: when the motor speed change trend indicates an increase in speed and the motor speed is less than a first speed threshold, determining the value correction scheme to be a first correction scheme; or, when the motor speed change trend indicates an increase in speed and the motor speed is greater than or equal to the first speed threshold, determining the value correction scheme to be a second correction scheme; or, when the motor speed change trend indicates a decrease in speed and the motor speed is less than a second speed threshold, determining the value correction scheme to be a third correction scheme; or, when the motor speed change trend indicates a decrease in speed and the motor speed is greater than or equal to the second speed threshold, determining the value correction scheme to be a fourth correction scheme.
  • the disclosed embodiment can take into account the differences in inverter loss problems and air conditioner noise problems corresponding to different speed change trends and different speed size states, and selectively select a more appropriate value correction scheme to better suppress air conditioner noise and inverter loss, which is conducive to further improving the stability of air conditioner operation.
  • the first correction scheme is to control the carrier frequency to operate at the first fixed carrier frequency.
  • the disclosed embodiment adopts a more direct fixed carrier frequency mode to operate, so as to more quickly suppress the inverter loss, which is conducive to ensuring the stability of the subsequent operation process of the air conditioner.
  • the motor speed is less than the first speed threshold, high-frequency resonance is not easy to occur, so the noise problem of the air conditioner is not prominent.
  • the second correction scheme is to control the carrier frequency to randomly take values within the fifth fluctuation range and adjust it periodically.
  • the motor speed change trend indicates speed increase and the motor speed is greater than or equal to the first speed threshold
  • the motor speed is too high, high-frequency resonance is prone to occur, the air conditioner noise problem is more prominent, and the acceleration is too fast under speed increase conditions, and the air conditioner operation is relatively unstable.
  • the disclosed embodiment selects a more appropriate fifth fluctuation range to randomly take values and periodically adjust the carrier frequency, so as to better suppress the inverter loss and avoid the resonance phenomenon between the motor and the inverter, which is beneficial to ensure the stability of the subsequent operation process of the air conditioner.
  • the third correction scheme is to control the carrier frequency to randomly take values within the fifth fluctuation range and adjust it periodically.
  • the motor speed change trend indicates a speed reduction and the motor speed is less than the second speed threshold
  • the acceleration is slow under the speed reduction condition
  • the motor speed is small
  • the air conditioner runs more stably.
  • the embodiment of the present disclosure does not need to achieve the carrier frequency by fixing the carrier frequency.
  • the disclosed embodiment can take into account both the suppression of air conditioner noise and the suppression of inverter losses, which is conducive to ensuring the stability of the subsequent operation process of the air conditioner.
  • the fourth correction scheme is to control the carrier frequency to randomly take values within the fifth fluctuation range and adjust it periodically.
  • the motor speed change trend indicates a speed reduction and the motor speed is greater than or equal to the second speed threshold
  • the motor speed is too high, high-frequency resonance is prone to occur, the air conditioner noise problem is more prominent, and the air conditioner operation is relatively unstable.
  • the embodiment of the present disclosure selects a more appropriate fifth fluctuation range to randomly take values and periodically adjust the carrier frequency, so as to better suppress the inverter loss and avoid the resonance phenomenon between the motor and the inverter, which is conducive to ensuring the stability of the subsequent operation process of the air conditioner.
  • the first fixed carrier frequency is equal to the reference carrier frequency corresponding to the first fluctuation range.
  • the first fixed carrier frequency is 16KHz, and the first fixed carrier frequency can also be adjusted according to the actual needs of the user, and adjusted to any other value within a reasonable range.
  • the embodiment of the present disclosure controls the carrier frequency to operate in a fixed manner according to the reference carrier frequency corresponding to the first fluctuation range, and can quickly achieve a reduction in the carrier frequency value, so as to better avoid overheating of the power module and increased switching losses caused by increased temperature rise of the inverter. Therefore, by setting a suitable first fixed carrier frequency, the embodiment of the present disclosure can suppress the inverter loss more quickly when the air conditioner is running more unstable, which is beneficial to improving the stability of the subsequent operation process of the air conditioner.
  • the reference carrier frequency Xa5 corresponding to the fifth fluctuation range is equal to Xa1
  • Xa1 is the reference carrier frequency corresponding to the first fluctuation range
  • Xmax1 is the upper limit value corresponding to the first fluctuation range
  • Xmin1 is the lower limit value corresponding to the first fluctuation range.
  • the fifth fluctuation range is [15KHz, 17KHz], and the fifth fluctuation range can also be adjusted according to the actual needs of the user to any other reasonable range.
  • the embodiment of the present disclosure controls the carrier frequency to randomly take values within the fifth fluctuation range and adjusts periodically, so that the reference carrier frequency corresponding to the fluctuation range can be adjusted to a lower level, so that the random value of the carrier frequency is relatively smaller, so as to avoid overheating of the power module and increase in switching loss caused by the increase in the temperature rise of the inverter, which is conducive to better suppressing the loss of the inverter.
  • the size of the fifth fluctuation range is reduced to half of the original fluctuation range, so that the random value of the carrier frequency can be further brought closer to the reference carrier frequency, which can also avoid the carrier frequency value being too large and help suppress the inverter loss. Therefore, by setting a suitable fifth fluctuation range, the embodiment of the present disclosure can better suppress the inverter loss when the air conditioner is running relatively unstable, which is conducive to improving the stability of the subsequent operation process of the air conditioner.
  • the adjustment process of the carrier frequency value strategy involved in step S404 to step S406 is not limited to being performed once.
  • the processor maintains the current carrier frequency value strategy.
  • the execution can return to step S404, and the processor recalculates the average value of the carrier frequency randomly selected within the preset time to obtain a new average carrier frequency, and based on the judgment result, further selects to execute step S405 or step S406 again.
  • step S406 the processor corrects the current value strategy of the carrier frequency, and after a preset time, the execution can return to step S404, and the processor recalculates the average value of the carrier frequency randomly selected within the preset time to obtain a new average carrier frequency, and further selects to execute step S405 or step S406 again based on the judgment result.
  • the embodiment of the present disclosure can cyclically execute steps S404 to S406 during the operation of the air conditioner, and by repeatedly comparing the average carrier frequency and the reference carrier frequency corresponding to the fluctuation range, the carrier frequency value strategy can be adjusted regularly, which is conducive to ensuring the stability of the air conditioner throughout the operation.
  • the embodiment of the present disclosure provides a control device 500 for an air conditioner, including a processor 501 and a memory 502.
  • the device may also include a communication interface 503 and a bus 504.
  • the processor 501, the communication interface 503, and the memory 502 may communicate with each other through the bus 504.
  • the communication interface 503 may be used for information transmission.
  • the processor 501 may call the logic instructions in the memory 502 to execute the control method for the air conditioner of the above embodiment.
  • logic instructions in the memory 502 described above can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.
  • the memory 502 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions/modules corresponding to the method in the embodiment of the present disclosure.
  • the processor 501 executes functional applications and data processing by running the program instructions/modules stored in the memory 502, that is, implementing the control method for the air conditioner in the above embodiment.
  • the memory 502 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc.
  • the memory 502 may include a high-speed random access memory and may also include a non-volatile memory.
  • an embodiment of the present disclosure provides an air conditioner 600, comprising: an air conditioner body, and the above-mentioned control device 500 for the air conditioner.
  • the air conditioner body is provided with a motor and a frequency converter.
  • the control device 500 for the air conditioner is installed on the air conditioner body.
  • the installation relationship described here is not limited to placement inside the product, but also includes installation connections with other components of the product, including but not limited to physical connection, electrical connection or signal transmission connection, etc. It can be understood by those skilled in the art that the control device 500 for the air conditioner can be adapted to a feasible product body, thereby realizing other feasible embodiments.
  • An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned control method for an air conditioner.
  • the present disclosure provides a computer program, which, when executed by a computer, enables the computer to:
  • the computer implements the above control method for the air conditioner.
  • An embodiment of the present disclosure provides a computer program product, which includes computer instructions stored on a computer-readable storage medium.
  • the program instructions When executed by a computer, the computer implements the above-mentioned control method for an air conditioner.
  • the computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.
  • the technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure.
  • the aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.
  • the term “and/or” as used in this application refers to any and all possible combinations of listings containing one or more associated ones.
  • the term “comprise” and its variants “comprises” and/or comprising refer to the presence of stated features, wholes, steps, operations, elements, and/or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and/or groups thereof.
  • the elements defined by the sentence “comprising a " do not exclude the presence of other identical elements in the process, method or device comprising the elements.
  • each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other.
  • the relevant parts can refer to the description of the method part.
  • the disclosed methods and products can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.
  • each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function.
  • the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved.

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  • Air Conditioning Control Device (AREA)

Abstract

一种用于空调器的控制方法、控制装置、空调器及存储介质，涉及空调器技术领域，控制方法包括：获取电机转速和电机转速变化趋势；根据电机转速和电机转速变化趋势，确定载波频率的波动范围；控制变频器在波动范围内随机取值并周期性调节载波频率。能够避免变频器的载波频率固定运行，并使得载波频率在合理范围内随机波动，从而能够兼顾空调器噪音的抑制以及变频器损耗的抑制，并能够避免电机与变频器发生共振现象。

Description

用于空调器的控制方法、装置及空调器、存储介质
本申请基于申请号为202310630619.X、申请日为2023年5月30日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及空调器技术领域，例如涉及一种用于空调器的控制方法、装置及空调器、存储介质。
背景技术
目前，随着人们生活水平的提高，对空调器的工作要求也越来越高。其中，空调器运行过程中的噪音问题尤为突出。空调器噪音可分为机械噪音和电磁噪音，电磁噪音与变频器的开关过程存在较大关联。基于此，相关技术提出了一种空调器载波频率的控制方法，包括：实时获取空调器的压缩机转速；比较压缩机转速和预设转速；若压缩机转速低于预设转速，则将空调器的载波频率设定为第一预设载波频率；以及，若压缩机转速高于或等于预设转速，则将空调器的载波频率设定为第二预设载波频率；其中，第二预设载波频率大于第一预设载波频率。
相关技术在压缩机转速较低时，采用低的载波频率，降低模块的开通关断损耗，减少模块的发热；在压缩机转速较高时，采用高的载波频率，降低压缩机噪声、减少压缩机发热，提高系统的控制性能和稳定性。
在实现本公开实施例的过程中，发现相关技术中至少存在如下问题：
相关技术中的变频器在一段时间内工作在固定的载波频率上，PWM(Pulse Width Modulation，脉冲宽度调制)会在电机电流波形中产生开关频率附近的高频电流谐波，这些高频电流谐波产生的气隙磁场会进一步和其他气隙谐波作用产生高频电磁力，这些电磁力会引起高频的电磁振动和噪声。且当这些电磁力的谐波频率与电机机械结构的频率一致时会引起共振现象，带来更大的噪声，不利于空调器运行的稳定性。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本申请的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
为了对披露的实施例的一些方面有基本的理解，下面给出了简单的概括。所述概括不是泛泛评述，也不是要确定关键/重要组成元素或描绘这些实施例的保护范围，而是作为后面的详细说明的序言。
本公开实施例提供了一种用于空调器的控制方法、装置及空调器、存储介质，能够兼顾空调器噪音的抑制以及变频器损耗的抑制，并能够避免电机发生共振现象，有利于提升空调器运行的稳定性。
在一些实施例中，所述方法包括：获取电机转速和电机转速变化趋势；根据电机转速和电机转速变化趋势，确定载波频率的波动范围；控制变频器在波动范围内随机取值并周期性调节载波频率。
在一些实施例中，所述装置包括：处理器和存储有程序指令的存储器，所述处理器被配置为在运行所述程序指令时，执行上述的用于空调器的控制方法。
在一些实施例中，所述空调器包括：空调器本体，设有电机和变频器；上述的用于空调器的控制装置，被安装于所述空调器本体。
在一些实施例中，所述存储介质，存储有程序指令，所述程序指令在运行时，执行上述的用于空调器的控制方法。
本公开实施例提供的用于空调器的控制方法、装置及空调器、存储介质，可以实现以下技术效果：
本公开实施例中，通过获取电机转速和电机转速变化趋势来把握空调器当前运行工况，并据此设定载波频率的波动范围，以控制变频器在波动范围内随机取值并周期性调节载波频率。由此，本公开实施例能够避免变频器的载波频率固定运行，并使得载波频率在合理范围内随机波动，从而能够兼顾空调器噪音的抑制以及变频器损耗的抑制，并能够避免电机与变频器发生共振现象，有利于提升空调器运行的稳定性。
以上的总体描述和下文中的描述仅是示例性和解释性的，不用于限制本申请。
附图说明
一个或多个实施例通过与之对应的附图进行示例性说明，这些示例性说明和附图并不构成对实施例的限定，附图中具有相同参考数字标号的元件示为类似的元件，附图不构成比例限制，并且其中：
图1是本公开实施例提供的一个用于空调器的控制方法的示意图；
图2是本公开实施例提供的另一个用于空调器的控制方法的示意图；
图3是本公开实施例提供的另一个用于空调器的控制方法的示意图；
图4是本公开实施例提供的另一个用于空调器的控制方法的示意图；
图5是本公开实施例提供的一个用于空调器的控制装置的示意图；
图6是本公开实施例提供的一个空调器的示意图。
具体实施方式
为了能够更加详尽地了解本公开实施例的特点与技术内容，下面结合附图对本公开实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本公开实施例。在以下的技术描述中，为方便解释起见，通过多个细节以提供对所披露实施例的充分理解。然而，在没有这些细节的情况下，一个或多个实施例仍然可以实施。在其它情况下，为简化附图，熟知的结构和装置可以简化展示。
本公开实施例的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本公开实施例的实施例。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含。
除非另有说明，术语“多个”表示两个或两个以上。
本公开实施例中，字符“/”表示前后对象是一种“或”的关系。例如，A/B表示：A或B。
术语“和/或”是一种描述对象的关联关系，表示可以存在三种关系。例如，A和/或B，表示：A或B，或，A和B这三种关系。
术语“对应”可以指的是一种关联关系或绑定关系，A与B相对应指的是A与B之间是一种关联关系或绑定关系。
目前，随着人们生活水平的提高，对空调器的工作要求也越来越高。其中，空调器运行过程中的噪音问题尤为突出。空调器噪音可分为机械噪音和电磁噪音，电磁噪音与变频器的开关过程存在较大关联。基于此，相关技术提出了一种空调器载波频率的控制方法，包括：实时获取空调器的压缩机转速；比较压缩机转速和预设转速；若压缩机转速低于预设转速，则将空调器的载波频率设定为第一预设载波频率；以及，若压缩机转速高于或等于预设转速，则将空调器的载波频率设定为第二预设载波频率；其中，第二预设载波频率大于第一预设载波频率。
相关技术在压缩机转速较低时，采用低的载波频率，降低模块的开通关断损耗，减少模块的发热；在压缩机转速较高时，采用高的载波频率，降低压缩机噪声、减少压缩机发热，提高系统的控制性能和稳定性。
但相关技术中的变频器在一段时间内工作在固定的载波频率上，PWM会在电机电流波形中产生开关频率附近的高频电流谐波，这些高频电流谐波产生的气隙磁场会进一步和其他气隙谐波作用产生高频电磁力，这些电磁力会引起高频的电磁振动和噪声。且当这些电磁力的谐波频率与电机机械结构的谐振频率一致时会引起更大的噪声。
结合图1所示，本公开实施例提供一种用于空调器的控制方法，包括：
S101，处理器获取电机转速和电机转速变化趋势。
S102，处理器根据电机转速和电机转速变化趋势，确定载波频率的波动范围。
S103，处理器控制变频器在波动范围内随机取值并周期性调节载波频率。
采用本公开实施例提供的用于空调器的控制方法，通过获取电机转速和电机转速变化趋势来把握空调器当前运行工况，并据此设定载波频率的波动范围，以控制变频器在波动范围内随机取值并周期性调节载波频率。由此，本公开实施例能够避免变频器的载波频率固定运行，并使得载波频率在合理范围内随机波动，从而能够兼顾空调器噪音的抑制以及变频器损耗的抑制，并能够避免电机与变频器发生共振现象，有利于提升空调器运行的稳定性。
可选地，处理器根据电机转速和电机转速变化趋势，确定载波频率的波动范围，包括：处理器根据电机转速变化趋势，确定转速阈值；处理器根据电机转速和转速阈值，确定载波频率的波动范围。这样，本公开实施例能够结合电机转速变化趋势设置合适的转速阈值，并通过比较电机转速与转速阈值来确定载波频率的波动范围，从而使得载波频率的取值能够符合电机实际运行工况，有利于兼顾空调器噪音的抑制以及变频器损耗的抑制。
可选地，处理器根据电机转速变化趋势，确定转速阈值，包括：在电机转速变化趋势表示升速的情况下，处理器确定转速阈值为第一转速阈值；或者，在电机转速变化趋势表示降速的情况下，处理器确定转速阈值为第二转速阈值。其中，第一转速阈值大于第二转速阈值。这样，针对电机升速的情况，本公开实施例设置稍大的第一转速阈值，通过给予一定的上升余量来确保电机转速能够准确到达目标转速，有利于更准确地区分电机升速情况下的低转速及高转速状态。而针对电机降速的情况，本公开实施例设置稍小的第二转速阈值，通过给予一定的下降余量来确保电机转速能够准确到达目标转速，有利于更准确地区分电机降速情况下的低转速及高转速状态。
可选地，在电机转速变化趋势表示升速的情况下，处理器根据电机转速和转速阈值，确定载波频率的波动范围，包括：在电机转速小于第一转速阈值的情况下，处理器确定载波频率的波动范围为第一波动范围；或者，在电机转速大于或等于第一转速阈值的情况下，处理器确定载波频率的波动范围为第二波动范围。这样，通过比较电机转速与第一转速阈 值的大小关系，本公开实施例能够区分电机升速情况下的低转速及高转速状态，并据此设置对应的第一波动范围和第二波动范围。由此，本公开实施例能够考虑到升速情况下不同转速状态对应的变频器损耗问题及空调器噪音问题的差异，通过使载波频率在对应的波动范围内随机取值并周期性调节，从而能够兼顾空调器噪音的抑制以及变频器损耗的抑制。
可选地，在电机转速变化趋势表示降速的情况下，处理器根据电机转速和转速阈值，确定载波频率的波动范围，包括：在电机转速小于第二转速阈值的情况下，处理器确定载波频率的波动范围为第三波动范围；或者，在电机转速大于或等于第二转速阈值的情况下，处理器确定载波频率的波动范围为第四波动范围。这样，通过比较电机转速与第二转速阈值的大小关系，本公开实施例能够区分电机降速情况下的低转速及高转速状态，并据此设置对应的第三波动范围和第四波动范围。由此，本公开实施例能够考虑到降速情况下不同转速状态对应的变频器损耗问题及空调器噪音问题的差异，通过使载波频率在对应的波动范围内随机取值并周期性调节，从而能够兼顾空调器噪音的抑制以及变频器损耗的抑制。
可选地，处理器控制变频器在波动范围内随机取值并周期性调节载波频率，包括：每间隔预设周期，处理器在波动范围内随机选取目标载波频率；处理器控制变频器的功率模块的开关频率响应于目标载波频率。这样，本公开实施例能够每间隔预设周期在波动范围内随机调节当前载波频率，进而实现对功率模块开关频率的动态调整，从而能够避免变频器的载波频率固定运行可能造成的电机共振问题，有利于提升空调器运行的稳定性。
可选地，变频器的功率模块为IGBT(Insulated Gate Bipolar Transistor，绝缘栅双极型晶体管)。功率模块也可以是其他能够实现类似功能的功率开关器件，本公开实施例对此不做具体限定。基于随机选取的目标载波频率，本公开实施例能够对IGBT的开关频率进行调整，进而能够控制相应周期内IGBT的开关次数。开关频率越高，IGBT的开关次数越多，电流波形的平滑性越好，电机发热越少，电机噪音也越小，但对其它设备的电磁干扰也越大，且IGBT的开关损耗增大，可能影响空调器的正常运行。开关频率越小，IGBT开关次数越少，因此能够有效降低开关损耗，但其降噪效果较差，不利于空调器噪音的抑制。本公开实施例在波动范围内随机选取目标载波频率，并适应性调节IGBT开关频率，可以兼顾空调器噪音的抑制以及变频器损耗的抑制，最终实现空调器噪音较小，变频器开关损耗较小，同时电流波形的平滑性较好，并能够有效降低对其它设备的电磁干扰。
可选地，预设周期可结合电机相关参数进行设置，以更好地避免电机与变频器发生共振现象。优选地，预设周期为2ms。预设周期也可以根据用户实际需求进行调整，设置为1ms或5ms等合理范围内的其他任意值。
可选地，电机可以是压缩机电机，变频器用于调节压缩机转速及运行频率。电机也可 以是风机电机，变频器用于调节风机转速。本公开实施例对此不做具体限定。
结合图2所示，本公开实施例提供另一种用于空调器的控制方法，包括：
S201，处理器获取电机转速和电机转速变化趋势。
S202，在电机转速变化趋势表示升速的情况下，处理器确定转速阈值为第一转速阈值。
S203，在电机转速小于第一转速阈值的情况下，处理器确定载波频率的波动范围为第一波动范围。
S204，在电机转速大于或等于第一转速阈值的情况下，处理器确定载波频率的波动范围为第二波动范围。
S205，在电机转速变化趋势表示降速的情况下，处理器确定转速阈值为第二转速阈值。
S206，在电机转速小于第二转速阈值的情况下，处理器确定载波频率的波动范围为第三波动范围。
S207，在电机转速大于或等于第二转速阈值的情况下，处理器确定载波频率的波动范围为第四波动范围。
S208，处理器控制变频器在波动范围内随机取值并周期性调节载波频率。
采用本公开实施例提供的用于空调器的控制方法，通过获取电机转速和电机转速变化趋势来把握空调器当前运行工况，并结合电机转速变化趋势设置合适的转速阈值，然后通过比较电机转速与转速阈值来确定载波频率的波动范围，以控制变频器在合适的波动范围内随机取值并周期性调节载波频率。由此，本公开实施例能够避免变频器的载波频率固定运行，并使得载波频率在合理范围内随机波动，从而能够兼顾空调器噪音的抑制以及变频器损耗的抑制，并能够避免电机与变频器发生共振现象，有利于提升空调器运行的稳定性。
可选地，第一转速阈值和第二转速阈值可结合预设转速阈值进行设置。其中，第一转速阈值大于预设转速阈值，第二转速阈值小于预设转速阈值。优选地，预设转速阈值为500rpm。这样，在电机升速时设置相对预设转速阈值更大的第一转速阈值，本公开实施例能够给予一定的上升余量来确保电机转速能够准确到达目标转速，有利于更准确地区分电机升速情况下的低转速及高转速状态，进而能够结合电机实际转速情况更准确地限定载波频率的波动范围。在电机降速时设置相对预设转速阈值更小的第二转速阈值，本公开实施例能够给予一定的下降余量来确保电机转速能够准确到达目标转速，有利于更准确地区分电机降速情况下的低转速及高转速状态，同样能够结合电机实际转速情况更准确地限定载波频率的波动范围。
可选地，第一转速阈值可根据电机升速速率进行调整。当电机升速较快时，第一转速阈值可设置稍大一些，以给予更合适的上升余量，有利于更准确地限定载波频率的波动范 围。优选地，第一转速阈值为560rpm。第一转速阈值也可以根据用户实际需求进行调整，调整为合理范围内的其他任意值。
可选地，第二转速阈值可根据电机降速速率进行调整。当电机降速较快时，第二转速阈值可设置稍小一些，以给予更合适的下降余量，有利于更准确地限定载波频率的波动范围。优选地，第二转速阈值为440rpm。第二转速阈值也可以根据用户实际需求进行调整，调整为合理范围内的其他任意值。
可选地，第一波动范围与第二波动范围不同。这样，针对电机升速情况下的低转速及高转速状态，本公开实施例充分考虑到两种状态下变频器损耗问题及空调器噪音问题的差异，通过分别设置不同的载波频率波动范围，能够更准确地实现空调器噪音的抑制以及变频器损耗的抑制。优选地，第一波动范围的上限值小于第二波动范围的上限值，第一波动范围的下限值小于第二波动范围的下限值。这样，针对高转速状态较为突出的噪音问题，本公开实施例能够设置载波频率取值相对更大的第二波动范围，从而有利于更好地抑制空调器噪音问题。而针对低转速状态，其噪音问题并不突出，本公开实施例设置载波频率取值相对更小的第一波动范围，从而有利于更好地抑制变频器损耗。由此，本公开实施例能够兼顾空调器噪音的抑制以及变频器损耗的抑制，有利于提升空调器运行的稳定性。
可选地，第三波动范围与第四波动范围不同。这样，针对电机降速情况下的低转速及高转速状态，本公开实施例充分考虑到两种状态下变频器损耗问题及空调器噪音问题的差异，通过分别设置不同的载波频率波动范围，能够更准确地实现空调器噪音的抑制以及变频器损耗的抑制。优选地，第三波动范围的上限值小于第四波动范围的上限值，第三波动范围的下限值小于第四波动范围的下限值。这样，针对高转速状态较为突出的噪音问题，本公开实施例能够设置载波频率取值相对更大的第四波动范围，从而有利于更好地抑制空调器噪音问题。而针对低转速状态，其噪音问题并不突出，本公开实施例设置载波频率取值相对更小的第三波动范围，从而有利于更好地抑制变频器损耗。由此，本公开实施例能够兼顾空调器噪音的抑制以及变频器损耗的抑制，有利于提升空调器运行的稳定性。
可选地，第一波动范围与第三波动范围相同。这样，本公开实施例能够简化控制，有利于降低控制的实施难度以及控制成本。
可选地，第二波动范围与第四波动范围相同。这样，本公开实施例能够简化控制，有利于降低控制的实施难度以及控制成本。
可选地，第一波动范围可根据检测的空调器实时噪音进行调整。第一波动范围的上限值以及下限值与噪音分贝值正相关。当空调器噪音分贝值较大时，第一波动范围的上限值及下限值可设置稍高一些，以使载波频率的随机取值相对更大，有利于更好地抑制空调器 噪音问题。优选地，第一波动范围为[14KHz，18KHz]。第一波动范围也可以根据用户实际需求进行调整，调整为其他任意合理范围。
可选地，第二波动范围可根据检测的功率模块实时温度进行调整。第二波动范围的上限值以及下限值与功率模块温度值负相关。当变频器的功率模块温度值较高时，第二波动范围的上限值及下限值可设置稍低一些，以使载波频率的随机取值相对更小，有利于更好地抑制变频器损耗。优选地，第二波动范围为[18KHz，22KHz]。第二波动范围也可以根据用户实际需求进行调整，调整为其他任意合理范围。
可选地，第三波动范围可根据检测的空调器实时噪音进行调整。第三波动范围的上限值以及下限值与噪音分贝值正相关。当空调器噪音分贝值较大时，第三波动范围的上限值及下限值可设置稍高一些，以使载波频率的随机取值相对更大，有利于更好地抑制空调器噪音问题。优选地，第三波动范围为[14KHz，18KHz]。第三波动范围也可以根据用户实际需求进行调整，调整为其他任意合理范围。
可选地，第四波动范围可根据检测的功率模块实时温度进行调整。第四波动范围的上限值以及下限值与功率模块温度值负相关。当变频器的功率模块温度值较高时，第四波动范围的上限值及下限值可设置稍低一些，以使载波频率的随机取值相对更小，有利于更好地抑制变频器损耗。优选地，第四波动范围为[18KHz，22KHz]。第四波动范围也可以根据用户实际需求进行调整，调整为其他任意合理范围。
结合图3所示，本公开实施例提供另一种用于空调器的控制方法，包括：
S301，处理器获取电机转速和电机转速变化趋势。
S302，处理器根据电机转速和电机转速变化趋势，确定载波频率的波动范围。
S303，处理器控制变频器在波动范围内随机取值并周期性调节载波频率。
S304，处理器计算预设时长内随机取值的载波频率的平均值，获得平均载波频率。
S305，处理器根据平均载波频率和波动范围对应的基准载波频率，调整载波频率的取值策略。
采用本公开实施例提供的用于空调器的控制方法，通过获取电机转速和电机转速变化趋势来把握空调器当前运行工况，并据此设定载波频率的波动范围，以控制变频器在波动范围内随机取值并周期性调节载波频率。由此，本公开实施例能够避免变频器的载波频率固定运行，并使得载波频率在合理范围内随机波动，从而能够兼顾空调器噪音的抑制以及变频器损耗的抑制，并能够避免电机与变频器发生共振现象，有利于提升空调器运行的稳定性。此外，当载波频率在波动范围内持续变动预设时长后，本公开实施例计算预设时长内随机取值的载波频率的平均值，并通过使其与波动范围对应的基准载波频率进行比较， 本公开实施例能够判断预设时长内载波频率的随机取值是否合适，进而能够依据判断结果优化载波频率的取值策略，以利于保障空调器后续运行过程的稳定性。
可选地，预设时长可结合变频器相关参数进行设置，以更及时地抑制变频器损耗。优选地，预设时长为1s。预设时长也可以根据用户实际需求进行调整，设置为0.5s或2s等合理范围内的其他任意值。
可选地，处理器计算预设时长内随机取值的载波频率的平均值，获得平均载波频率，包括：处理器计算获得平均载波频率其中，Xi为第i次随机取值的载波频率，n为预设时长内载波频率的随机取值次数，可由预设时长与预设周期作比获得。这样，本公开实施例能够准确获得预设时长内随机取值的载波频率的平均值，有利于判断预设时长内载波频率的随机取值是否合适。
可选地，处理器按照以下方式确定波动范围对应的基准载波频率，包括：处理器计算Xa＝(Xmax+Xmin)/2，获得波动范围对应的基准载波频率Xa。其中，Xmax为波动范围的上限值，Xmin为波动范围的下限值。这样，波动范围的基准载波频率为波动范围上限值与下限值的平均值，即本公开实施例围绕基准载波频率进行波动范围内的随机取值。基准载波频率能够反映载波频率随机取值的大小，基准载波频率越大，载波频率的随机取值相对更大，有利于较好抑制空调器噪音问题。基准载波频率越小，载波频率的随机取值相对更小，有利于较好抑制变频器损耗。
可选地，处理器根据平均载波频率和波动范围对应的基准载波频率，调整载波频率的取值策略，包括：在平均载波频率小于波动范围对应的基准载波频率的情况下，处理器维持载波频率的当前取值策略；或者，在平均载波频率大于或等于波动范围对应的基准载波频率的情况下，处理器修正载波频率的当前取值策略。这样，当平均载波频率小于波动范围对应的基准载波频率时，表明预设时长内载波频率的随机取值较为合理，能够很好兼顾空调器噪音的抑制以及变频器损耗的抑制。因此本公开实施例维持载波频率的当前取值策略，以确保空调器后续运行过程的稳定性。而当平均载波频率大于或等于波动范围对应的基准载波频率时，表明预设时长内载波频率的随机取值偏大，此时变频器温升较大，其功率模块的损耗量较大，可能影响空调器的正常运行。为了抑制变频器损耗，避免空调器意外停机，本公开实施例及时修正载波频率的当前取值策略，以保障空调器后续运行过程的稳定性。由此，通过比较平均载波频率和波动范围对应的基准载波频率，本公开实施例能够判断预设时长内载波频率的随机取值是否合适，进而能够依据判断结果优化载波频率的取值策略，以利于保障空调器后续运行过程的稳定性。
可选地，本公开实施例还可以引入修正系数来更准确地调整载波频率的取值策略。具体地，在平均载波频率小于基准载波频率与修正系数的乘积的情况下，处理器维持载波频率的当前取值策略。在平均载波频率大于或等于基准载波频率与修正系数的乘积的情况下，处理器修正载波频率的当前取值策略。这样，本公开实施例能够调整载波频率的取值修正方案的触发难度，有利于结合实际工况优化载波频率的取值策略，以利于保障空调器后续运行过程的稳定性。
可选地，修正系数a可根据检测的功率模块实时温度进行设置。当变频器的功率模块温度较高时，修正系数a可设置稍低一些，以更容易触发载波频率的取值修正方案，有利于及时抑制变频器损耗，以保障空调器后续运行过程的稳定性。优选地，修正系数a为1.00。修正系数a也可以根据用户实际需求进行调整，设置为0.95或1.05等合理范围内的其他任意值。
结合图4所示，本公开实施例提供另一种用于空调器的控制方法，包括：
S401，处理器获取电机转速和电机转速变化趋势。
S402，处理器根据电机转速和电机转速变化趋势，确定载波频率的波动范围。
S403，处理器控制变频器在波动范围内随机取值并周期性调节载波频率。
S404，处理器计算预设时长内随机取值的载波频率的平均值，获得平均载波频率。
S405，在平均载波频率小于波动范围对应的基准载波频率的情况下，处理器维持载波频率的当前取值策略。
S406，在平均载波频率大于或等于波动范围对应的基准载波频率的情况下，处理器修正载波频率的当前取值策略。
采用本公开实施例提供的用于空调器的控制方法，通过获取电机转速和电机转速变化趋势来把握空调器当前运行工况，并据此设定载波频率的波动范围，以控制变频器在波动范围内随机取值并周期性调节载波频率。由此，本公开实施例能够避免变频器的载波频率固定运行，并使得载波频率在合理范围内随机波动，从而能够兼顾空调器噪音的抑制以及变频器损耗的抑制，并能够避免电机与变频器发生共振现象，有利于提升空调器运行的稳定性。此外，当载波频率在波动范围内持续变动预设时长后，本公开实施例计算预设时长内随机取值的载波频率的平均值，并通过使其与波动范围对应的基准载波频率进行比较，本公开实施例能够判断预设时长内载波频率的随机取值是否合适。若平均载波频率小于波动范围对应的基准载波频率，则预设时长内载波频率的随机取值较为合理，能够很好兼顾空调器噪音的抑制以及变频器损耗的抑制。因此本公开实施例维持载波频率的当前取值策略，以确保空调器后续运行过程的稳定性。而若平均载波频率大于或等于波动范围对应的 基准载波频率，则预设时长内载波频率的随机取值偏大，此时变频器温升较大，其功率模块的损耗量较大，可能影响空调器的正常运行。为了抑制变频器损耗，避免空调器意外停机，本公开实施例及时修正载波频率的当前取值策略，以保障空调器后续运行过程的稳定性。
可选地，处理器修正载波频率的当前取值策略，包括：处理器根据电机转速和电机转速变化趋势，确定取值修正方案；处理器按照取值修正方案，修正载波频率的当前取值策略。这样，当平均载波频率大于或等于波动范围对应的基准载波频率时，空调器运行较不稳定。本公开实施例能够结合电机转速和电机转速变化趋势来把握电机工况，从而能够据此选取更为合适的取值修正方案，以便于更好地抑制空调器噪音及变频器损耗，有利于进一步提升空调器运行的稳定性。
可选地，取值修正方案包括：处理器控制载波频率在新的波动范围内随机取值并周期性调节。这样，当平均载波频率大于或等于波动范围对应的基准载波频率时，空调器运行较不稳定。本公开实施例控制载波频率在新的更合适的波动范围内随机取值并周期性调节，能够适应性降低载波频率的随机取值大小，以避免变频器温升增加所导致的功率模块过热以及开关损耗量增大。由此，通过设定合适的新的波动范围，本公开实施例能够在空调器运行较不稳定的情况下进一步抑制变频器损耗，有利于提升空调器后续运行过程的稳定性。
可选地，处理器按照以下方式确定新的波动范围，包括：处理器根据波动范围对应的平均载波频率与基准载波频率的差值，确定新的波动范围对应的上限值、下限值以及基准载波频率。其中，该差值与新的波动范围对应的上限值、下限值以及基准载波频率为负相关关系。这样，本公开实施例能够根据原始波动范围对应的平均载波频率与基准载波频率的差值，判断空调器运行的不稳定程度。当该差值越大，表明变频器温升越大，其功率模块的损耗量越大，空调器意外停机的可能性也就越大。此时，为了更及时地抑制变频器损耗，避免空调器意外停机，本公开实施例设定更小的载波频率波动范围，以提升空调器后续运行过程的稳定性。
可选地，取值修正方案包括：处理器控制载波频率按照固定载波频率运行。这样，当平均载波频率大于或等于波动范围对应的基准载波频率时，空调器运行较不稳定。本公开实施例控制载波频率按照合适的固定载波频率运行，能够迅速实现载波频率取值的降低，以更好地避免变频器温升增加所导致的功率模块过热以及开关损耗量增大。由此，通过设定合适的固定载波频率，本公开实施例能够在空调器运行较不稳定的情况下更快速抑制变频器损耗，有利于提升空调器后续运行过程的稳定性。
可选地，处理器按照以下方式确定固定载波频率，包括：处理器根据波动范围对应的 平均载波频率与基准载波频率的差值，确定固定载波频率。其中，该差值与固定载波频率为负相关关系。这样，本公开实施例能够根据原始波动范围对应的平均载波频率与基准载波频率的差值，判断空调器运行的不稳定程度。当该差值越大，表明变频器温升越大，其功率模块的损耗量越大，空调器意外停机的可能性也就越大。此时，为了更及时地抑制变频器损耗，避免空调器意外停机，本公开实施例设定更小的固定载波频率，以提升空调器后续运行过程的稳定性。
可选地，处理器根据电机转速和电机转速变化趋势，确定载波频率的取值修正方案，包括：在电机转速变化趋势表示升速且电机转速小于第一转速阈值的情况下，确定取值修正方案为第一修正方案；或者，在电机转速变化趋势表示升速且电机转速大于或等于第一转速阈值的情况下，确定取值修正方案为第二修正方案；或者，在电机转速变化趋势表示降速且电机转速小于第二转速阈值的情况下，确定取值修正方案为第三修正方案；或者，在电机转速变化趋势表示降速且电机转速大于或等于第二转速阈值的情况下，确定取值修正方案为第四修正方案。这样，本公开实施例能够考虑到不同转速变化趋势以及不同转速大小状态对应的变频器损耗问题及空调器噪音问题的差异，针对性地选取更合适的取值修正方案，以便于更好地抑制空调器噪音及变频器损耗，有利于进一步提升空调器运行的稳定性。
可选地，第一修正方案为控制载波频率按照第一固定载波频率运行。这样，当电机转速变化趋势表示升速且电机转速小于第一转速阈值时，由于升速情况下加速度偏快，为了保障空调器运行稳定性，本公开实施例采用更为直接的固定载波频率的方式运行，以更快速抑制变频器损耗，有利于保障空调器后续运行过程的稳定性。且由于电机转速小于第一转速阈值，高频共振现象不易发生，故空调器噪音问题并不突出。
可选地，第二修正方案为控制载波频率在第五波动范围内随机取值并周期性调节。这样，当电机转速变化趋势表示升速且电机转速大于或等于第一转速阈值时，电机转速偏大，高频共振现象易发生，空调器噪音问题较为突出，且升速情况下加速度偏快，空调器运行较不稳定。本公开实施例选取更合适的第五波动范围随机取值并周期性调节载波频率，从而能够更好地抑制变频器损耗，并能够避免电机与变频器发生共振现象，有利于保障空调器后续运行过程的稳定性。
可选地，第三修正方案为控制载波频率在第五波动范围内随机取值并周期性调节。这样，当电机转速变化趋势表示降速且电机转速小于第二转速阈值时，降速情况下加速度偏慢，电机转速偏小，空调器运行较为稳定。且由于电机转速小于第二转速阈值，空调器噪音问题及变频器损耗问题并不明显，故本公开实施例无需通过固定载波频率的方式达成载 波频率的快速降低。通过选取更合适的第五波动范围随机取值并周期性调节载波频率，本公开实施例能够兼顾空调器噪音的抑制以及变频器损耗的抑制，有利于保障空调器后续运行过程的稳定性。
可选地，第四修正方案为控制载波频率在第五波动范围内随机取值并周期性调节。这样，当电机转速变化趋势表示降速且电机转速大于或等于第二转速阈值时，电机转速偏大，高频共振现象易发生，空调器噪音问题较为突出，空调器运行较不稳定。本公开实施例选取更合适的第五波动范围随机取值并周期性调节载波频率，从而能够更好地抑制变频器损耗，并能够避免电机与变频器发生共振现象，有利于保障空调器后续运行过程的稳定性。
优选地，第一固定载波频率等于第一波动范围对应的基准载波频率。具体地，第一固定载波频率为16KHz，第一固定载波频率也可以根据用户实际需求进行调整，调整为合理范围内的其他任意值。这样，本公开实施例控制载波频率按照第一波动范围对应的基准载波频率固定运行，能够迅速实现载波频率取值的降低，以更好地避免变频器温升增加所导致的功率模块过热以及开关损耗量增大。由此，通过设定合适的第一固定载波频率，本公开实施例能够在空调器运行较不稳定的情况下更快速抑制变频器损耗，有利于提升空调器后续运行过程的稳定性。
优选地，第五波动范围对应的基准载波频率Xa5等于Xa1，第五波动范围对应的上限值Xmax5满足Xmax5-Xa5＝(Xmax1-Xa1)/2，第五波动范围对应的下限值Xmin5满足Xa5-Xmin5＝(Xa1-Xmin1)/2。其中，Xa1为第一波动范围对应的基准载波频率，Xmax1为第一波动范围对应的上限值，Xmin1为第一波动范围对应的下限值。具体地，第五波动范围为[15KHz，17KHz]，第五波动范围也可以根据用户实际需求进行调整，调整为其他任意合理范围。这样，本公开实施例控制载波频率在第五波动范围内随机取值并周期性调节，从而能够将波动范围对应的基准载波频率调至较低水平,以使载波频率的随机取值相对更小，以避免变频器温升增加所导致的功率模块过热以及开关损耗量增大，有利于较好抑制变频器损耗。且通过调整波动范围对应的上限值及下限值，第五波动范围的大小缩小至原始波动范围的一半，从而能够使得载波频率的随机取值进一步向基准载波频率靠拢，同样能够避免载波频率取值偏大并有利于抑制变频器损耗。由此，通过设定合适的第五波动范围，本公开实施例能够在空调器运行较不稳定的情况下更好地抑制变频器损耗，有利于提升空调器后续运行过程的稳定性。
可选地，本公开实施例中，步骤S404至步骤S406所涉及的对载波频率取值策略的调整过程并不仅限执行一次。在进入步骤S405之后，处理器维持载波频率的当前取值策略， 经过预设时长后可返回执行步骤S404，处理器重新计算预设时长内随机取值的载波频率的平均值，获得新的平均载波频率，并基于判断结果再次选择进一步执行步骤S405或步骤S406。或者，在进入步骤S406之后，处理器修正载波频率的当前取值策略，经过预设时长后可返回执行步骤S404，处理器重新计算预设时长内随机取值的载波频率的平均值，获得新的平均载波频率，并基于判断结果再次选择进一步执行步骤S405或步骤S406。这样，本公开实施例能够在空调器的运行过程中循环执行步骤S404至步骤S406，通过多次比较平均载波频率和波动范围对应的基准载波频率，以实现载波频率取值策略的定期调整，有利于保障空调器运行全程的稳定性。
结合图5所示，本公开实施例提供一种用于空调器的控制装置500，包括处理器(processor)501和存储器(memory)502。可选地，该装置还可以包括通信接口(Communication Interface)503和总线504。其中，处理器501、通信接口503、存储器502可以通过总线504完成相互间的通信。通信接口503可以用于信息传输。处理器501可以调用存储器502中的逻辑指令，以执行上述实施例的用于空调器的控制方法。
此外，上述的存储器502中的逻辑指令可以通过软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。
存储器502作为一种计算机可读存储介质，可用于存储软件程序、计算机可执行程序，如本公开实施例中的方法对应的程序指令/模块。处理器501通过运行存储在存储器502中的程序指令/模块，从而执行功能应用以及数据处理，即实现上述实施例中用于空调器的控制方法。
存储器502可包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据终端设备的使用所创建的数据等。此外，存储器502可以包括高速随机存取存储器，还可以包括非易失性存储器。
结合图6所示，本公开实施例提供了一种空调器600，包括：空调器本体，以及上述的用于空调器的控制装置500。空调器本体设有电机和变频器。用于空调器的控制装置500被安装于空调器本体。这里所表述的安装关系，并不仅限于在产品内部放置，还包括了与产品的其他元器件的安装连接，包括但不限于物理连接、电性连接或者信号传输连接等。本领域技术人员可以理解的是，用于空调器的控制装置500可以适配于可行的产品主体，进而实现其他可行的实施例。
本公开实施例提供了一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令设置为执行上述用于空调器的控制方法。
本公开实施例提供了一种计算机程序，当所述计算机程序被计算机执行时，使所述计 算机实现上述用于空调器的控制方法。
本公开实施例提供了一种计算机程序产品，所述计算机程序产品包括存储在计算机可读存储介质上的计算机指令，当所述程序指令被计算机执行时，使所述计算机实现上述用于空调器的控制方法。
上述的计算机可读存储介质可以是暂态计算机可读存储介质，也可以是非暂态计算机可读存储介质。
本公开实施例的技术方案可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括一个或多个指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本公开实施例所述方法的全部或部分步骤。而前述的存储介质可以是非暂态存储介质，包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等多种可以存储程序代码的介质，也可以是暂态存储介质。
以上描述和附图充分地示出了本公开的实施例，以使本领域的技术人员能够实践它们。其他实施例可以包括结构的、逻辑的、电气的、过程的以及其他的改变。实施例仅代表可能的变化。除非明确要求，否则单独的部件和功能是可选的，并且操作的顺序可以变化。一些实施例的部分和特征可以被包括在或替换其他实施例的部分和特征。而且，本申请中使用的用词仅用于描述实施例并且不用于限制权利要求。如在实施例以及权利要求的描述中使用的，除非上下文清楚地表明，否则单数形式的“一个”(a)、“一个”(an)和“所述”(the)旨在同样包括复数形式。类似地，如在本申请中所使用的术语“和/或”是指包含一个或一个以上相关联的列出的任何以及所有可能的组合。另外，当用于本申请中时，术语“包括”(comprise)及其变型“包括”(comprises)和/或包括(comprising)等指陈述的特征、整体、步骤、操作、元素，和/或组件的存在，但不排除一个或一个以上其它特征、整体、步骤、操作、元素、组件和/或这些的分组的存在或添加。在没有更多限制的情况下，由语句“包括一个…”限定的要素，并不排除在包括所述要素的过程、方法或者设备中还存在另外的相同要素。本文中，每个实施例重点说明的可以是与其他实施例的不同之处，各个实施例之间相同相似部分可以互相参见。对于实施例公开的方法、产品等而言，如果其与实施例公开的方法部分相对应，那么相关之处可以参见方法部分的描述。
本领域技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，可以取决于技术方案的特定应用和设计约束条件。所述技术人员可以对每个特定的应用来使用不同方法以实现所描述的功能，但是这种实现不应认为超出本 公开实施例的范围。所述技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
本文所披露的实施例中，所揭露的方法、产品(包括但不限于装置、设备等)，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，可以仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例。另外，在本公开实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
附图中的流程图和框图显示了根据本公开实施例的系统、方法和计算机程序产品的可能实现的体系架构、功能和操作。在这点上，流程图或框图中的每个方框可以代表一个模块、程序段或代码的一部分，所述模块、程序段或代码的一部分包含一个或多个用于实现规定的逻辑功能的可执行指令。在有些作为替换的实现中，方框中所标注的功能也可以以不同于附图中所标注的顺序发生。例如，两个连续的方框实际上可以基本并行地执行，它们有时也可以按相反的顺序执行，这可以依所涉及的功能而定。在附图中的流程图和框图所对应的描述中，不同的方框所对应的操作或步骤也可以以不同于描述中所披露的顺序发生，有时不同的操作或步骤之间不存在特定的顺序。例如，两个连续的操作或步骤实际上可以基本并行地执行，它们有时也可以按相反的顺序执行，这可以依所涉及的功能而定。框图和/或流程图中的每个方框、以及框图和/或流程图中的方框的组合，可以用执行规定的功能或动作的专用的基于硬件的系统来实现，或者可以用专用硬件与计算机指令的组合来实现。

Claims (14)

  1. 一种用于空调器的控制方法，其特征在于，包括：
    获取电机转速和电机转速变化趋势；
    根据电机转速和电机转速变化趋势，确定载波频率的波动范围；
    控制变频器在波动范围内随机取值并周期性调节载波频率。
  2. 根据权利要求1所述的方法，其特征在于，所述根据电机转速和电机转速变化趋势，确定载波频率的波动范围，包括：
    根据电机转速变化趋势，确定转速阈值；
    根据电机转速和转速阈值，确定载波频率的波动范围。
  3. 根据权利要求2所述的方法，其特征在于，所述根据电机转速变化趋势，确定转速阈值，包括：
    在电机转速变化趋势表示升速的情况下，确定转速阈值为第一转速阈值；或者，
    在电机转速变化趋势表示降速的情况下，确定转速阈值为第二转速阈值；
    其中，第一转速阈值大于第二转速阈值。
  4. 根据权利要求3所述的方法，其特征在于，在电机转速变化趋势表示升速的情况下，所述根据电机转速和转速阈值，确定载波频率的波动范围，包括：
    在电机转速小于第一转速阈值的情况下，确定载波频率的波动范围为第一波动范围；或者，
    在电机转速大于或等于第一转速阈值的情况下，确定载波频率的波动范围为第二波动范围。
  5. 根据权利要求3所述的方法，其特征在于，在电机转速变化趋势表示降速的情况下，所述根据电机转速和转速阈值，确定载波频率的波动范围，包括：
    在电机转速小于第二转速阈值的情况下，确定载波频率的波动范围为第三波动范围；或者，
    在电机转速大于或等于第二转速阈值的情况下，确定载波频率的波动范围为第四波动范围。
  6. 根据权利要求1至5任一项所述的方法，其特征在于，所述控制变频器在波动范围内随机取值并周期性调节载波频率之后，还包括：
    计算预设时长内随机取值的载波频率的平均值，获得平均载波频率；
    根据平均载波频率和波动范围对应的基准载波频率，调整载波频率的取值策略。
  7. 根据权利要求6所述的方法，其特征在于，所述根据平均载波频率和波动范围 对应的基准载波频率，调整载波频率的取值策略，包括：
    在平均载波频率小于波动范围对应的基准载波频率的情况下，维持载波频率的当前取值策略；或者，
    在平均载波频率大于或等于波动范围对应的基准载波频率的情况下，修正载波频率的当前取值策略。
  8. 根据权利要求7所述的方法，其特征在于，所述修正载波频率的当前取值策略，包括：
    根据电机转速和电机转速变化趋势，确定取值修正方案；
    按照取值修正方案，修正载波频率的当前取值策略。
  9. 根据权利要求8所述的方法，其特征在于，所述取值修正方案包括：
    控制载波频率在新的波动范围内随机取值并周期性调节；或者，
    控制载波频率按照固定载波频率运行。
  10. 一种用于空调器的控制装置，包括处理器和存储有程序指令的存储器，其特征在于，所述处理器被配置为在运行所述程序指令时，执行如权利要求1至9任一项所述的用于空调器的控制方法。
  11. 一种空调器，其特征在于，包括：
    空调器本体，设有电机和变频器；
    如权利要求10所述的用于空调器的控制装置，被安装于所述空调器本体。
  12. 一种存储介质，存储有程序指令，其特征在于，所述程序指令在运行时，执行如权利要求1至9任一项所述的用于空调器的控制方法。
  13. 一种计算机程序，当所述计算机程序被计算机执行时，使所述计算机实现如权利要求1至9任一项所述的用于空调器的控制方法。
  14. 一种计算机程序产品，所述计算机程序产品包括存储在计算机可读存储介质上的计算机指令，当所述程序指令被计算机执行时，使所述计算机实现如权利要求1至9任一项所述的用于空调器的控制方法。
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CN111380174A (zh) * 2020-03-27 2020-07-07 广东美的制冷设备有限公司 空调器的控制方法、装置、空调器和介质
CN114001448A (zh) * 2021-10-18 2022-02-01 广东美芝制冷设备有限公司 空调器的控制方法及装置
CN115218411A (zh) * 2022-06-27 2022-10-21 青岛海尔空调器有限总公司 用于空调器的控制方法、控制装置、空调器和存储介质
CN115789914A (zh) * 2022-11-25 2023-03-14 宁波奥克斯电气股份有限公司 空调控制方法、装置及空调器

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