CN113819580B - Frequency adjusting method and device, readable storage medium and air conditioner - Google Patents

Frequency adjusting method and device, readable storage medium and air conditioner Download PDF

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Publication number
CN113819580B
CN113819580B CN202111254725.XA CN202111254725A CN113819580B CN 113819580 B CN113819580 B CN 113819580B CN 202111254725 A CN202111254725 A CN 202111254725A CN 113819580 B CN113819580 B CN 113819580B
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Prior art keywords
frequency
air conditioner
value
maximum
operating frequency
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CN113819580A (en
Inventor
彭泉贵
赵浩伟
陈柯壁
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GD Midea Heating and Ventilating Equipment Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
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GD Midea Heating and Ventilating Equipment Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
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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
    • F24F11/41—Defrosting; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F25B49/022—Compressor control arrangements
    • 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)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a frequency adjusting method, a device, a readable storage medium and an air conditioner, wherein the frequency adjusting method comprises the following steps: acquiring a maximum operation frequency of a compressor and a first detection value of an operation parameter of an outdoor heat exchanger in a current defrosting operation period; acquiring a second detection value of the air conditioner before the air conditioner enters a defrosting mode; determining a parameter difference value according to the first detection value and the second detection value; the maximum operation frequency is adjusted according to the comparison result of the parameter difference and the preset difference threshold value, so that the adjusted maximum operation frequency is used as the maximum operable frequency of the compressor in the next defrosting operation period.

Description

Frequency adjusting method and device, readable storage medium and air conditioner
Technical Field
The invention relates to the technical field of control, in particular to a frequency adjusting method, a frequency adjusting device, a readable storage medium and an air conditioner.
Background
The outdoor heat exchanger of the air conditioner is easy to quickly frost under the use working conditions of low-temperature and high-humidity environments, and the air conditioner enters a defrosting mode frequently under the condition of high frosting speed, so that the capacity output of the air conditioner becomes unstable.
Disclosure of Invention
The present invention has been made to solve at least one of the problems occurring in the prior art or the related art.
To this end, a first aspect of the present invention is to provide a frequency adjustment method.
In a second aspect of the present invention, a frequency adjustment apparatus is provided.
A third aspect of the present invention is to provide a readable storage medium.
A fourth aspect of the present invention is to provide an air conditioner.
In view of the above, according to a first aspect of the present invention, there is provided a frequency adjustment method for a compressor in an air conditioner including an outdoor heat exchanger, comprising: acquiring a maximum operating frequency of a compressor and a first detection value of an operating parameter of an outdoor heat exchanger in a current defrosting operation period; acquiring a second detection value of the air conditioner before the air conditioner enters a defrosting mode; determining a parameter difference value according to the first detection value and the second detection value; and adjusting the maximum operation frequency according to the comparison result of the parameter difference and the preset difference threshold value, so that the adjusted maximum operation frequency is used as the maximum operable frequency of the compressor in the next defrosting operation period.
The technical scheme of the application provides a frequency adjusting method, and the adjusting method can be operated to realize the adjustment of the maximum operating frequency of the compressor, so that the adjusted maximum operating frequency is matched with the actual operating condition of the air conditioner, and meanwhile, the average heat exchange capacity of the air conditioner in a defrosting period is improved, for example, the average heat exchange capacity is improved by 5 to 10 percent. Therefore, the frosting speed of the outdoor heat exchanger can be reduced, so that the capacity output of the air conditioner is more stable, and the problems in the prior art are solved.
The technical scheme of the application is realized based on the following principle, specifically, the method comprises the following steps:
under the same working condition of the air conditioner, the larger the difference value between the first detection value and the second detection value is, the higher the frosting amount and/or the frosting speed of the outdoor heat exchanger is, that is, under the condition that the parameter difference value is larger, the higher the frosting amount and/or the frosting speed of the outdoor heat exchanger is, and in this case, the more unstable the output of the air conditioner is.
In general, in the case that the outdoor heat exchanger is frosted, the heat exchange performance of the outdoor heat exchanger is lower as the frosting amount is larger, and at the moment that the air conditioner enters the defrosting mode, the heat exchange performance of the outdoor heat exchanger is at the lowest value, the first detection value can be a detection value corresponding to any moment in the defrosting operation period, and a parameter difference value can be obtained by calculating the difference value between the first detection value and the second detection value, so as to determine the attenuation degree of the heat exchange performance of the outdoor heat exchanger.
The technical scheme of this application compares parameter difference and preset difference threshold value to confirm the size of parameter difference according to the comparison result, and adjust maximum operating frequency according to this size, so that the maximum operating frequency after the adjustment and the actual use operating mode looks adaptation of air conditioner, and then realize that the ability output of air conditioner after the adjustment is more steady.
In any of the above technical solutions, in the defrosting mode, that is, when the air conditioner operates according to the defrosting mode, frost accumulated on the outdoor heat exchanger can be removed.
In any of the above technical solutions, the preset difference threshold is a comparison parameter for measuring the frosting speed and/or the frosting amount of the outdoor heat exchanger, and the specific value thereof may be set according to the use scenario of the air conditioner.
In any of the above technical solutions, the preset difference threshold may also be an empirical value, and is set by a user.
In addition, the claimed frequency adjustment method of the present application has the following additional technical features.
In the above technical solution, based on the parameter difference being greater than the first preset difference threshold, the maximum operating frequency is decreased.
In the technical scheme, under the condition that the parameter difference value exceeds a first preset difference value threshold value, the maximum operation frequency of the current compressor is determined to be higher, namely the frosting speed of the current outdoor heat exchanger is higher and is not adaptive to the current use working condition of the air conditioner, and the frosting speed of the outdoor heat exchanger is reduced by reducing the value of the maximum operation frequency, so that the operation parameters of the air conditioner are adaptive to the current use working condition of the air conditioner, and the capacity output of the air conditioner is more stable.
In addition, under the condition that the use scene of the air conditioner is not changed, namely the use working condition of the air conditioner is not changed, the maximum operation frequency is reduced, and meanwhile, the defrosting operation period is prolonged, so that the starting frequency of a defrosting mode is reduced, the frequency of switching the four-way valve by the air conditioner is reduced, and the service life of the air conditioner is prolonged.
In addition, the defrosting operation period is prolonged, so that the influence of frequent operation of the air conditioner in a defrosting mode on the use of a user in the operation process of the air conditioner is reduced.
In any of the above technical solutions, the reducing the maximum operating frequency includes: acquiring a first adjustment coefficient; determining a first adjusting value according to the first adjusting coefficient and the maximum operating frequency; the maximum operating frequency is adjusted lower according to the first adjustment value.
In the technical scheme, a specific scheme for reducing the maximum operating frequency is specifically defined, and the operation according to the scheme is convenient for the adjustment of the maximum operating frequency to be matched with the current operating state of the air conditioner, so that the influence on the operating stability of the air conditioner due to overlarge adjustment range of the maximum operating frequency is avoided.
Specifically, the first adjustment coefficient is a constant, and a value range of the first adjustment coefficient may be set according to a use scenario of the air conditioner.
In one technical scheme, the first adjustment coefficient is larger than zero and smaller than 1.
In one embodiment, the first adjustment value is a product of a first adjustment coefficient and a maximum operating frequency.
In one embodiment, the adjustment of the maximum operating frequency according to the first adjustment value may be understood as decreasing the first adjustment value on the basis of the maximum operating frequency to obtain the adjusted maximum operating frequency.
In any of the above technical solutions, based on the parameter difference being smaller than the second preset difference threshold, the maximum operating frequency is increased.
In the technical scheme, under the condition that the time interval is lower than the second preset difference threshold value, the maximum operation frequency of the current compressor is determined to be lower and is not matched with the current use working condition of the air conditioner, and the operation parameters of the air conditioner are matched with the current use work of the air conditioner by improving the value of the maximum operation frequency, so that the capacity output of the air conditioner is more stable.
In any of the above technical solutions, increasing the maximum operating frequency includes: acquiring a second adjustment coefficient; determining a second adjusting value according to the second adjusting coefficient and the maximum operating frequency; and increasing the maximum operation frequency according to the second adjustment value.
In the technical scheme, a specific scheme for increasing the maximum operating frequency is specifically defined, and the operation according to the scheme is convenient for the adjustment of the maximum operating frequency to be matched with the current operating state of the air conditioner, so that the influence on the operating stability of the air conditioner due to overlarge adjustment range of the maximum operating frequency is avoided.
Specifically, the second adjustment coefficient is a constant, and the value range thereof can be set according to the use scene of the air conditioner.
In one technical solution, the second adjustment coefficient is greater than zero and less than 1.
In one embodiment, the second adjustment value is a product of a second adjustment coefficient and the maximum operating frequency.
In one embodiment, increasing the maximum operating frequency according to the second adjustment value may be understood as increasing the second adjustment value on the basis of the maximum operating frequency to obtain the adjusted maximum operating frequency.
In any of the above technical solutions, the method further includes: determining a sum of the second adjustment value and the maximum operating frequency; and taking the default maximum operation frequency as the adjusted maximum operation frequency based on the sum value being greater than or equal to the default maximum operation frequency.
In the technical scheme, in consideration of the fact that the adjusted maximum operating frequency may exceed the default maximum operating frequency in the process of increasing the maximum operating frequency, it is obvious that the maximum operating frequency already exceeds the frequency at which the compressor can operate under the condition that the maximum operating frequency exceeds the default maximum operating frequency, and if the compressor operates according to the adjusted maximum operating frequency, the probability of the compressor failing is increased.
According to the technical scheme, under the condition that the sum value is larger than or equal to the default maximum operation frequency, the default maximum operation frequency is directly used as the adjusted maximum operation frequency, so that the condition can be avoided, and the operation reliability of the air conditioner is improved.
In any of the above technical solutions, the maximum operating frequency is maintained unchanged based on the parameter difference being greater than or equal to the second preset difference threshold and less than or equal to the first preset difference threshold.
In the technical scheme, the adjustment frequency of the maximum operation frequency is reduced by keeping the maximum operation frequency unchanged.
In any of the above technical solutions, based on the parameter difference being smaller than the third preset difference threshold, the maximum operating frequency is adjusted to the default maximum operating frequency.
In this technical solution, the third preset difference threshold is smaller than the second preset difference threshold.
In the technical scheme, if the parameter difference is lower than a third preset difference threshold value, the maximum operation frequency is determined to be improperly set, so that the heating efficiency of the air conditioner in the operation process is too low, the performance of the air conditioner is seriously affected, and the default maximum operation frequency is used as the adjusted maximum operation frequency, so that the operation efficiency of the air conditioner is improved, and the performance of the air conditioner is maximized.
In any of the above technical solutions, the defrosting operation period is a time difference between the last time the air conditioner exits the defrosting mode and the next time the air conditioner enters the defrosting mode.
In any of the above technical solutions, timing is started based on the last time the air conditioner exits the defrost mode; and acquiring a detection value of the operation parameter based on the timing duration being greater than the preset duration until the air conditioner enters a defrosting mode for the next time, wherein the first detection value is the maximum detection value of the operation parameter in a defrosting operation period.
In the technical scheme, the first detection value is limited to belong to the maximum detection value of the operation parameter in the detection process, so that the operation state of the outdoor heat exchanger under the optimal heat exchange efficiency is represented by using the first detection value, and the determined parameter difference value can accurately represent the maximum attenuation degree of the heat exchange capacity of the outdoor heat exchanger.
In the technical scheme, the detection value of the operation parameter is obtained by timing when the timing duration reaches the preset duration, so that the influence of the defrosting mode on the first detection value is avoided within the preset duration when the air conditioner finishes operating the defrosting mode.
In any of the above technical solutions, the preset time period is 5 minutes to 10 minutes.
In any of the above technical solutions, the second detection value is a minimum detection value of the operation parameter in the defrosting operation period.
In any of the above technical solutions, the operation parameters include: coil temperature or vapor pressure.
In the technical scheme, possible selection parameters of the operation parameters are specifically limited, so that the air conditioner can be selected according to actual use conditions, and the use requirements of different use scenes can be met.
According to a second aspect of the present invention, there is provided a frequency adjustment device for a compressor in an air conditioner including an outdoor heat exchanger, comprising: the defrosting control device comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring the maximum operation frequency of a compressor and a first detection value of an operation parameter of an outdoor heat exchanger in the current defrosting operation period; the second acquisition unit is used for acquiring a second detection value of the air conditioner before the air conditioner enters the defrosting mode; a calculation unit for determining a parameter difference value from the first detection value and the second detection value; and the adjusting unit is used for adjusting the maximum operating frequency according to the comparison result of the parameter difference and the preset difference threshold value, so that the adjusted maximum operating frequency is used as the maximum operable frequency of the compressor in the next defrosting operation period.
The technical scheme of this application provides a frequency adjustment device, uses this adjusting device's air conditioner, can realize the adjustment of the maximum operating frequency of compressor to the maximum operating frequency after the adjustment and the actual use operating mode looks adaptation of air conditioner, simultaneously, improved the average heat transfer ability of air conditioner in the cycle of defrosting, if improve 5% to 10%. Therefore, the frosting speed of the outdoor heat exchanger can be reduced, so that the capacity output of the air conditioner is more stable, and the problems in the prior art are solved.
The technical scheme of the application is realized based on the following principle, specifically, the method comprises the following steps:
under the same working condition of the air conditioner, the larger the difference value between the first detection value and the second detection value is, the higher the frosting amount and/or frosting speed of the outdoor heat exchanger is, that is, under the condition of larger parameter difference value, the higher the frosting amount and/or frosting speed of the outdoor heat exchanger is, and in this case, the more unstable the output of the air conditioner is.
In general, in the case that the outdoor heat exchanger is frosted, the heat exchange performance of the outdoor heat exchanger is lower as the frosting amount is larger, and at the moment that the air conditioner enters the defrosting mode, the heat exchange performance of the outdoor heat exchanger is at the lowest value, the first detection value can be a detection value corresponding to any moment in the defrosting operation period, and a parameter difference value can be obtained by calculating the difference value between the first detection value and the second detection value, so as to determine the attenuation degree of the heat exchange performance of the outdoor heat exchanger.
The technical scheme of this application compares parameter difference and preset difference threshold value to confirm the size of parameter difference according to the comparative result, and adjust maximum operating frequency according to this size, so that the maximum operating frequency after the adjustment and the in-service use operating mode looks adaptation of air conditioner, and then realize that the ability output of air conditioner after the adjustment is more steady.
In any of the above technical solutions, in the defrosting mode, that is, when the air conditioner operates according to the defrosting mode, frost accumulated on the outdoor heat exchanger can be removed.
In any of the above technical solutions, the preset difference threshold is a comparison parameter for measuring the frosting speed and/or the frosting amount of the outdoor heat exchanger, and the specific value thereof may be set according to the use scenario of the air conditioner.
In any of the above technical solutions, the preset difference threshold may also be an empirical value, and is set by a user.
In addition, the claimed frequency adjustment apparatus of the present application has the following additional technical features.
In the above technical solution, the adjusting unit is specifically configured to: and reducing the maximum operation frequency based on the parameter difference value being larger than a first preset difference value threshold.
In the technical scheme, under the condition that the parameter difference value exceeds a first preset difference value threshold value, the maximum operation frequency of the current compressor is determined to be higher, namely the frosting speed of the current outdoor heat exchanger is higher and is not adaptive to the current use working condition of the air conditioner, and the frosting speed of the outdoor heat exchanger is reduced by reducing the value of the maximum operation frequency, so that the operation parameters of the air conditioner are adaptive to the current use working condition of the air conditioner, and the capacity output of the air conditioner is more stable.
In addition, under the condition that the use scene of the air conditioner is not changed, namely the use working condition of the air conditioner is not changed, the maximum operation frequency is reduced, and meanwhile, the defrosting operation period is prolonged, so that the starting frequency of a defrosting mode is reduced, the frequency of switching the four-way valve by the air conditioner is reduced, and the service life of the air conditioner is prolonged.
In addition, because the defrosting operation period is prolonged, the influence of frequent operation of the air conditioner in a defrosting mode on the use of a user is reduced during the operation of the air conditioner.
In any of the above technical solutions, the adjusting unit is specifically configured to: acquiring a first adjustment coefficient; determining a first adjusting value according to the first adjusting coefficient and the maximum operating frequency; the maximum operating frequency is adjusted lower according to the first adjustment value.
In the technical scheme, a specific scheme for reducing the maximum operating frequency is specifically defined, and the operation according to the scheme is convenient for the adjustment of the maximum operating frequency to be matched with the current operating state of the air conditioner, so that the influence on the operating stability of the air conditioner due to overlarge adjustment range of the maximum operating frequency is avoided.
Specifically, the first adjustment coefficient is a constant, and a value range of the first adjustment coefficient may be set according to a use scenario of the air conditioner.
In one technical solution, the first adjustment coefficient is greater than zero and less than 1.
In one embodiment, the first adjustment value is a product of a first adjustment coefficient and the maximum operating frequency.
In one embodiment, the adjustment of the maximum operating frequency according to the first adjustment value may be understood as a reduction of the first adjustment value on the basis of the maximum operating frequency in order to obtain the adjusted maximum operating frequency.
In any of the above technical solutions, the adjusting unit is specifically configured to: and increasing the maximum operation frequency based on the parameter difference value being smaller than a second preset difference value threshold.
In the technical scheme, under the condition that the time interval is lower than the second preset difference threshold value, the maximum operation frequency of the current compressor is determined to be lower and is not matched with the current use working condition of the air conditioner, and the operation parameters of the air conditioner are matched with the current use work of the air conditioner by improving the value of the maximum operation frequency, so that the capacity output of the air conditioner is more stable.
In any of the above technical solutions, the adjusting unit is specifically configured to: acquiring a second adjustment coefficient; determining a second adjusting value according to the second adjusting coefficient and the maximum operating frequency; and increasing the maximum operation frequency according to the second adjustment value.
In the technical scheme, a specific scheme for increasing the maximum operating frequency is specifically defined, and the operation according to the scheme is convenient for the adjustment of the maximum operating frequency to be matched with the current operating state of the air conditioner, so that the influence on the operating stability of the air conditioner due to overlarge adjustment range of the maximum operating frequency is avoided.
Specifically, the second adjustment coefficient is a constant, and the value range thereof can be set according to the use scene of the air conditioner.
In one technical solution, the second adjustment coefficient is greater than zero and less than 1.
In one embodiment, the second adjustment value is a product of a second adjustment coefficient and the maximum operating frequency.
In one embodiment, increasing the maximum operating frequency according to the second adjustment value may be understood as increasing the second adjustment value on the basis of the maximum operating frequency to obtain the adjusted maximum operating frequency.
In any of the above technical solutions, the adjusting unit is further configured to: determining a sum of the second adjustment value and the maximum operating frequency; and taking the default maximum operation frequency as the adjusted maximum operation frequency based on the sum value being greater than or equal to the default maximum operation frequency.
In the technical scheme, in consideration of the fact that the adjusted maximum operating frequency may exceed the default maximum operating frequency in the process of increasing the maximum operating frequency, it is obvious that the maximum operating frequency already exceeds the frequency at which the compressor can operate under the condition that the maximum operating frequency exceeds the default maximum operating frequency, and if the compressor operates according to the adjusted maximum operating frequency, the probability of the compressor failing is increased.
According to the technical scheme, under the condition that the sum value is greater than or equal to the default maximum operation frequency, the default maximum operation frequency is directly used as the adjusted maximum operation frequency, so that the condition is avoided, and the operation reliability of the air conditioner is improved.
In any of the above technical solutions, the adjusting unit is specifically configured to: and maintaining the maximum operation frequency unchanged based on the parameter difference value being greater than or equal to the second preset difference value threshold and being less than or equal to the first preset difference value threshold.
In the technical scheme, the adjustment frequency of the maximum operation frequency is reduced by keeping the maximum operation frequency unchanged.
In any of the above technical solutions, the adjusting unit is specifically configured to: and adjusting the maximum operation frequency to be the default maximum operation frequency based on the parameter difference value being smaller than a third preset difference value threshold.
In the technical scheme, the third preset difference threshold is smaller than the second preset difference threshold.
In the technical scheme, if the parameter difference is lower than a third preset difference threshold value, the maximum operation frequency is determined to be improperly set, so that the heating efficiency of the air conditioner in the operation process is too low, the performance of the air conditioner is seriously affected, and the default maximum operation frequency is used as the adjusted maximum operation frequency, so that the operation efficiency of the air conditioner is improved, and the performance of the air conditioner is maximized.
In any of the above technical solutions, the defrosting operation period is a time difference between the last time the air conditioner exits the defrosting mode and the next time the air conditioner enters the defrosting mode.
In any of the above technical solutions, the first obtaining unit is specifically configured to: starting timing based on the last time the air conditioner exits the defrosting mode; and acquiring a detection value of the operation parameter based on the timing duration being greater than the preset duration until the air conditioner enters the defrosting mode next time and is stopped, wherein the first detection value is the maximum detection value of the operation parameter in the defrosting operation period.
In the technical scheme, the first detection value is limited to belong to the maximum detection value of the operation parameter in the detection process, so that the operation state of the outdoor heat exchanger under the optimal heat exchange efficiency is represented by using the first detection value, and the maximum attenuation degree of the heat exchange capacity of the outdoor heat exchanger can be accurately represented by the determined parameter difference value.
In the technical scheme, the detection value of the operation parameter is obtained by timing when the timing duration reaches the preset duration, so that the influence of the defrosting mode on the first detection value is avoided within the preset duration when the air conditioner finishes operating the defrosting mode.
In any of the above technical solutions, the preset time period is 5 minutes to 10 minutes.
In any of the above technical solutions, the second detection value is a minimum detection value of the operation parameter in the defrosting operation period.
In any of the above technical solutions, the operation parameters include: coil temperature or vapor pressure.
According to a third aspect of the invention, there is provided a readable storage medium on which is stored a program or instructions which, when executed by a processor, implement the steps of the frequency adjustment method as claimed in any one of the above.
According to a fourth aspect of the present invention, there is provided an air conditioner comprising: the frequency adjusting device is provided; or a readable storage medium as described above.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart illustrating a frequency adjustment method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating the reduction of the maximum operating frequency in an embodiment of the present invention;
FIG. 3 illustrates a schematic flow chart of increasing the maximum operating frequency in an embodiment of the present invention;
fig. 4 shows a schematic block diagram of a frequency adjustment arrangement in an embodiment of the invention;
fig. 5 is a schematic diagram showing the average heat exchange capacity during the defrosting operation period before and after the frequency adjustment in the embodiment of the present invention.
Detailed Description
So that the manner in which the above recited aspects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the scope of the present invention is not limited by the specific embodiments disclosed below.
Example one
As shown in fig. 1, according to a first aspect of the present invention, there is provided a frequency adjustment method for a compressor in an air conditioner including an outdoor heat exchanger, comprising:
102, acquiring the maximum operating frequency of a compressor and a first detection value of an operating parameter of an outdoor heat exchanger in the current defrosting operation period;
104, acquiring a second detection value of the air conditioner before the air conditioner enters a defrosting mode;
step 106, determining a parameter difference value according to the first detection value and the second detection value;
and 108, adjusting the maximum operation frequency according to the comparison result of the parameter difference and the preset difference threshold value, so that the adjusted maximum operation frequency is used as the maximum operable frequency of the compressor in the next defrosting operation period.
An embodiment of the present application provides a frequency adjustment method, and by operating the frequency adjustment method, the maximum operating frequency of a compressor can be adjusted, so that the adjusted maximum operating frequency is adapted to an actual operating condition of an air conditioner, specifically, as shown in fig. 5, an average heat exchange capacity of the air conditioner in a defrosting operation period is improved, for example, by 5% to 10%. Therefore, the frosting speed of the outdoor heat exchanger can be reduced, so that the capacity output of the air conditioner is more stable, and the problems existing in the prior embodiment are overcome.
The embodiments of the present application are realized based on the following principles, specifically including:
under the same working condition of the air conditioner, the larger the difference value between the first detection value and the second detection value is, the higher the frosting amount and/or frosting speed of the outdoor heat exchanger is, that is, under the condition of larger parameter difference value, the higher the frosting amount and/or frosting speed of the outdoor heat exchanger is, and in this case, the more unstable the output of the air conditioner is.
In general, in the case that the outdoor heat exchanger is frosted, the heat exchange performance of the outdoor heat exchanger is lower as the frosting amount is larger, the heat exchange performance of the outdoor heat exchanger is at the lowest value at the moment when the air conditioner enters the defrosting mode, the first detection value can be a detection value corresponding to any moment in the defrosting operation cycle, and a parameter difference value can be obtained by calculating the difference value between the first detection value and the second detection value so as to determine the attenuation degree of the heat exchange performance of the outdoor heat exchanger.
The embodiment of the application compares the parameter difference value with the preset difference value threshold value so as to determine the size of the parameter difference value according to the comparison result, and adjust the maximum operating frequency according to the size, so that the adjusted maximum operating frequency is adaptive to the actual use working condition of the air conditioner, and further the adjusted capacity output of the air conditioner is more stable.
In any of the above embodiments, the defrosting mode, i.e., when the air conditioner operates in the defrosting mode, frost formed on the outdoor heat exchanger can be removed.
In any of the above embodiments, the preset difference threshold is a comparison parameter for measuring the frosting speed and/or the frosting amount of the outdoor heat exchanger, and the specific value thereof may be set according to the usage scenario of the air conditioner. In any of the above embodiments, the preset difference threshold may also be an empirical value, and is set by a user.
Example two
In the above embodiment, the maximum operating frequency is decreased based on the parameter difference being greater than the first preset difference threshold.
In this embodiment, when the parameter difference exceeds the first preset difference threshold, the maximum operating frequency of the current compressor is determined to be higher, that is, the frosting speed of the current outdoor heat exchanger is higher and is not adaptive to the current operating condition of the air conditioner, and the frosting speed of the outdoor heat exchanger is reduced by reducing the value of the maximum operating frequency, so that the operating parameters of the air conditioner are adaptive to the current operating condition of the air conditioner, and the capacity output of the air conditioner is more stable.
In addition, under the condition that the use scene of the air conditioner is not changed, namely the use working condition of the air conditioner is not changed, the maximum operation frequency is reduced, and meanwhile, the defrosting operation period is prolonged, so that the starting frequency of a defrosting mode is reduced, the frequency of switching the four-way valve by the air conditioner is reduced, and the service life of the air conditioner is prolonged.
In addition, because the defrosting operation period is prolonged, the influence of frequent operation of the air conditioner in a defrosting mode on the use of a user is reduced during the operation of the air conditioner.
In any of the above embodiments, as shown in fig. 2, the reducing the maximum operating frequency comprises:
step 202, acquiring a first adjustment coefficient;
step 204, determining a first adjusting value according to the first adjusting coefficient and the maximum operating frequency;
step 206, the maximum operating frequency is reduced according to the first adjustment value.
In the embodiment, a specific scheme for reducing the maximum operating frequency is specifically defined, and the operation according to the scheme is performed, so that the adjustment of the maximum operating frequency can be matched with the current operating state of the air conditioner, and the influence on the operating stability of the air conditioner due to overlarge adjustment amplitude of the maximum operating frequency is avoided.
Specifically, the first adjustment coefficient is a constant, and a value range thereof may be set according to a usage scenario of the air conditioner.
In one embodiment, the first adjustment factor is greater than zero and less than 1.
In one embodiment, the first adjustment value is a product of the first adjustment coefficient and the maximum operating frequency.
In one embodiment, the maximum operating frequency is adjusted to be lower by the first adjustment value, which is to be understood as the first adjustment value is decreased on the basis of the maximum operating frequency in order to obtain the adjusted maximum operating frequency.
EXAMPLE III
In any of the above embodiments, the maximum operating frequency is increased based on the parameter difference being less than a second preset difference threshold.
In this embodiment, under the condition that the time interval is lower than the second preset difference threshold, the maximum operating frequency of the current compressor is determined to be lower and not adapted to the current operating condition of the air conditioner, and the operating parameters of the air conditioner are adapted to the current user of the air conditioner by increasing the value of the maximum operating frequency, so that the capacity output of the air conditioner is more stable.
In any of the above embodiments, as shown in fig. 3, the increasing the maximum operating frequency includes:
step 302, acquiring a second adjustment coefficient;
step 304, determining a second adjustment value according to the second adjustment coefficient and the maximum operating frequency;
and step 306, increasing the maximum operation frequency according to the second adjusting value.
In the embodiment, a specific scheme for increasing the maximum operating frequency is specifically defined, and the operation according to the scheme is performed, so that the adjustment of the maximum operating frequency can be matched with the current operating state of the air conditioner, and the influence on the operating stability of the air conditioner due to overlarge adjustment amplitude of the maximum operating frequency is avoided.
Specifically, the second adjustment coefficient is a constant, and the value range thereof can be set according to the use scene of the air conditioner.
In one embodiment, the second adjustment factor is greater than zero and less than 1.
In one embodiment, the second adjustment value is a product of the second adjustment coefficient and the maximum operating frequency.
In one embodiment, increasing the maximum operating frequency by the second adjustment value may be understood as increasing the second adjustment value on the basis of the maximum operating frequency to obtain an adjusted maximum operating frequency.
In any of the above embodiments, further comprising: determining a sum of the second adjustment value and the maximum operating frequency; and taking the default maximum operation frequency as the adjusted maximum operation frequency based on the sum value being greater than or equal to the default maximum operation frequency.
In this embodiment, in consideration of the fact that the adjusted maximum operating frequency may exceed the default maximum operating frequency in the process of increasing the maximum operating frequency, it is obvious that the maximum operating frequency already exceeds the frequency at which the compressor can operate in the case that the maximum operating frequency exceeds the default maximum operating frequency, and if the compressor is operated according to the adjusted maximum operating frequency, the probability of the compressor failing may be increased.
According to the embodiment of the application, under the condition that the sum value is greater than or equal to the default maximum operation frequency, the default maximum operation frequency is directly used as the adjusted maximum operation frequency, so that the condition is avoided, and the operation reliability of the air conditioner is improved.
Example four
In any of the above embodiments, the maximum operating frequency is maintained based on the parameter difference being greater than or equal to the second predetermined difference threshold and less than or equal to the first predetermined difference threshold.
In this embodiment, the adjustment frequency of the maximum operating frequency is reduced by keeping the maximum operating frequency constant.
EXAMPLE five
In any of the above embodiments, the maximum operating frequency is adjusted to the default maximum operating frequency based on the parameter difference being less than the third preset difference threshold.
In this embodiment, the third preset difference threshold is less than the second preset difference threshold.
In this embodiment, if the parameter difference is lower than the third preset difference threshold, it is determined that the maximum operating frequency is improperly set, so that the heating efficiency of the air conditioner during the operation process is too low, and the performance of the air conditioner is seriously affected.
In any of the above embodiments, the defrost operating period is the time difference between the last time the air conditioner exits the defrost mode and the next time the air conditioner enters the defrost mode.
In any of the above embodiments, timing is started based on the last time the air conditioner exits the defrost mode; and acquiring a detection value of the operation parameter based on the timing duration being greater than the preset duration until the air conditioner enters a defrosting mode for the next time, wherein the first detection value is the maximum detection value of the operation parameter in a defrosting operation period.
In the embodiment, the first detection value is defined to belong to the maximum detection value of the operation parameter in the detection process, so that the operation state of the outdoor heat exchanger under the optimal heat exchange efficiency can be represented by using the first detection value, and the determined parameter difference value can accurately represent the maximum attenuation degree of the heat exchange capacity of the outdoor heat exchanger.
In the above embodiment, by timing, and when the timing duration reaches the preset duration, the detection value of the operation parameter is obtained, so as to avoid the influence of the defrosting mode on the first detection value within the preset duration when the air conditioner finishes operating the defrosting mode.
In any of the above embodiments, the predetermined period of time is 5 minutes to 10 minutes.
In any of the above embodiments, the second detection value is a minimum detection value of the operation parameter during the defrosting operation period.
EXAMPLE six
In one embodiment, the operating parameters include: coil temperature or vapor pressure.
In this embodiment, a frequency adjustment scheme corresponding to the selection of the temperature of the coil by the operation parameter is specifically defined, and specifically, the frequency adjustment scheme includes:
acquiring the maximum value T1 of the outdoor heat exchanger tube temperature in the last defrosting operation period, the outdoor heat exchanger tube temperature T2 immediately before defrosting, and the maximum operation frequency F _ max of the compressor, and if the difference value delta T between T1 and T2 is greater than the first preset temperature Ty1, reducing the maximum operation frequency of the compressor, and performing the maximum frequency correction control on the compressor by the air conditioner:
if the difference value delta T between the next defrosting period T1 and the next defrosting period T2 is greater than the first preset temperature Ty1, continuously reducing the maximum operating frequency of the compressor;
if the difference value delta T between the next defrosting period T1 and the next defrosting period T2 is less than the second preset temperature Ty2, increasing the maximum operating frequency of the compressor;
if the difference value delta T between the T1 and the T2 of the next defrosting period is less than the first preset temperature Ty1 and greater than the second preset temperature Ty2, the maximum operating frequency of the compressor of the next operating period is kept unchanged;
if the difference Δ T between T1 and T2 is less than the third preset temperature Ty3, the maximum operating frequency of the compressor is restored to the initial value F0_ max, which is the default maximum operating frequency herein, and the defrosting maximum operating frequency correction control is exited.
When the air conditioner is in the maximum operation frequency correction control of the compressor, the maximum value T1 of the outdoor heat exchanger tube temperature in the last defrosting operation period, the outdoor heat exchanger tube temperature T2 in the moment before defrosting, and the maximum operation frequency Fn _ max of the compressor are obtained, wherein Fn _ max is less than or equal to F0_ max, n is more than or equal to 0 and is an integer. If the difference value delta T between the last defrosting period T1 and T2 is greater than the first preset temperature Ty1, the maximum operating frequency Fn +1_max = Fn _max-delta F1 of the compressor, wherein delta F1 is not less than 0 and is an integer; if the difference Δ T between the last defrosting cycles T1 and T2 is less than the second preset temperature Ty2, the maximum operating frequency Fn +1 \ max = min (Fn _ max + Δ F2, F0_ max), wherein Δ F2 is greater than or equal to 0 and is an integer; if the difference value delta T between the last T1 and the last T2 is less than the first preset temperature Ty1 and greater than the second preset temperature Ty2, keeping the maximum operating frequency of the current compressor unchanged and still being Fn _ max; if the difference Δ T between T1 and T2 is less than the third preset temperature Ty3, the maximum operating frequency of the compressor is restored to the initial value F0_ max, and the defrosting maximum operating frequency correction control is exited.
Wherein Δ F1= a × Fn _ max rounded, Δ F2= b × Fn _ max rounded, 0 < a < 1,0 < b < 1, optionally a = b.
In one embodiment, the maximum value T1 of the tube temperature of the outdoor heat exchanger starts to be compared and selected after the time T1 of defrosting exits until the selection is finished before the next defrosting starts, the tube temperature T2 of the outdoor heat exchanger is the tube temperature at the moment before defrosting is started, and optionally, T2 is the minimum value of the tube temperature of the outdoor heat exchanger in the last defrosting operation period.
In one embodiment, a frequency adjustment scheme corresponding to the selection of the evaporation pressure as the operation parameter is specifically defined, and specifically includes:
and acquiring the maximum value P1 of the pressure of the outdoor heat exchanger in the last defrosting operation period, the pressure P2 of the outdoor heat exchanger at the moment before defrosting is started, and the maximum operation frequency F _ max of the compressor, and if the difference value delta P between P1 and P2 is greater than the first preset pressure Py1, reducing the maximum operation frequency of the compressor, and performing maximum frequency correction control on the air conditioner.
If the difference value delta P between the next defrosting period P1 and the next defrosting period P2 is larger than the first preset pressure Py1, continuously reducing the maximum operating frequency of the compressor;
if the difference value delta P between the next defrosting period P1 and the next defrosting period P2 is smaller than the second preset pressure Py2, the maximum operating frequency of the compressor is increased;
if the difference value delta P between the next defrosting period P1 and the next defrosting period P2 is smaller than the first preset pressure Py1 and larger than the second preset pressure Py2, the maximum operating frequency of the compressor in the next operating period is kept unchanged;
if the difference Δ P between P1 and P2 is less than the third preset pressure Py3, the maximum operating frequency of the compressor is restored to the initial value F0_ max, which is the default maximum operating frequency herein, and the defrost maximum operating frequency correction control is exited.
When the air device is under the maximum frequency correction control of the compressor, the maximum pressure P1 of the outdoor heat exchanger in the last defrosting operation period, the pressure P2 of the outdoor heat exchanger before defrosting, and the maximum operation frequency Fn _ max of the compressor are obtained, wherein Fn _ max is less than or equal to F0_ max, n is more than or equal to 0 and is an integer.
If the difference value delta P between the last defrosting period P1 and P2 is larger than the first preset pressure Py1, the maximum operating frequency Fn +1_max = Fn _max-delta F1 of the compressor, wherein delta F1 is not less than 0 and is an integer;
if the difference Δ P between the last defrost cycle P1 and P2 is less than the second preset pressure Py2, the maximum operating frequency Fn + 1/max = min (Fn _ max + Δ F2, F0_ max), where Δ F2 is greater than or equal to 0 and is an integer;
if the difference value delta P between the last P1 and the last P2 is smaller than the first preset pressure Py1 and larger than the second preset pressure Py2, keeping the maximum operating frequency of the current compressor unchanged and still being Fn _ max;
if the difference Δ P between P1 and P2 is less than the third preset pressure Py3, the maximum operating frequency of the compressor is restored to the initial value F0_ max, and the defrosting maximum operating frequency correction control is exited.
Wherein Δ F1= a × Fn _ max rounded, Δ F2= b × Fn _ max rounded, 0 < a < 1,0 < b < 1, optionally a = b.
In one embodiment, the maximum value P1 of the outdoor heat exchanger pressure starts to be selected comparatively after the time P1 of defrosting exiting, until the selection is finished before the next defrosting starts, the outdoor heat exchanger pressure P2 is the pressure at the moment before defrosting enters, and optionally, P2 is the minimum value of the indoor heat exchanger pressure in the last defrosting operation period.
EXAMPLE seven
In one embodiment of the present invention, as shown in fig. 4, the present invention provides a frequency adjustment apparatus 400 for a compressor in an air conditioner including an outdoor heat exchanger, comprising: a first obtaining unit 402, configured to obtain a maximum operating frequency of the compressor and a first detection value of an operating parameter of the outdoor heat exchanger in a current defrosting operation period; a second obtaining unit 404, configured to obtain a second detection value before the air conditioner enters the defrosting mode; a calculation unit 406 for determining a parameter difference value based on the first detection value and the second detection value; and an adjusting unit 408, configured to adjust the maximum operating frequency according to a comparison result between the parameter difference and the preset difference threshold, so as to use the adjusted maximum operating frequency as the maximum operable frequency of the compressor in the next defrosting operation period.
The embodiment of the application provides a frequency adjusting device 400, and an air conditioner using the adjusting device can realize adjustment of the maximum operating frequency of a compressor, so that the adjusted maximum operating frequency is adapted to the actual operating condition of the air conditioner, and meanwhile, the average heat exchange capacity of the air conditioner in a defrosting operation period is improved, for example, the average heat exchange capacity is improved by 5 to 10 percent. Therefore, the frosting speed of the outdoor heat exchanger can be reduced, so that the capacity output of the air conditioner is more stable, and the problems existing in the prior embodiment are overcome.
The embodiments of the present application are realized based on the following principles, specifically including:
under the same working condition of the air conditioner, the larger the difference value between the first detection value and the second detection value is, the higher the frosting amount and/or frosting speed of the outdoor heat exchanger is, that is, under the condition of larger parameter difference value, the higher the frosting amount and/or frosting speed of the outdoor heat exchanger is, and in this case, the more unstable the output of the air conditioner is.
In general, in the case that the outdoor heat exchanger is frosted, the heat exchange performance of the outdoor heat exchanger is lower as the frosting amount is larger, and at the moment that the air conditioner enters the defrosting mode, the heat exchange performance of the outdoor heat exchanger is at the lowest value, the first detection value can be a detection value corresponding to any moment in the defrosting operation period, and a parameter difference value can be obtained by calculating the difference value between the first detection value and the second detection value, so as to determine the attenuation degree of the heat exchange performance of the outdoor heat exchanger.
The embodiment of the application compares the parameter difference value with the preset difference value threshold value, so that the size of the parameter difference value is determined according to the comparison result, the maximum operation frequency is adjusted according to the size, the adjusted maximum operation frequency is matched with the actual use working condition of the air conditioner, and the capability output of the adjusted air conditioner is more stable.
In any of the above embodiments, the defrosting mode, i.e., when the air conditioner operates in the defrosting mode, frost formed on the outdoor heat exchanger can be removed.
In any of the above embodiments, the preset difference threshold is a comparison parameter for measuring a frosting speed and/or a frosting amount of the outdoor heat exchanger, and a specific value thereof may be set according to a usage scenario of the air conditioner.
In any of the above embodiments, the preset difference threshold may also be an empirical value, and is set by a user.
In the above embodiment, the adjusting unit 408 is specifically configured to: and reducing the maximum operating frequency based on the parameter difference value being larger than a first preset difference value threshold.
In this embodiment, when the parameter difference exceeds the first preset difference threshold, the maximum operating frequency of the current compressor is determined to be higher, that is, the frosting speed of the current outdoor heat exchanger is higher and is not adaptive to the current operating condition of the air conditioner, and the frosting speed of the outdoor heat exchanger is reduced by reducing the value of the maximum operating frequency, so that the operating parameters of the air conditioner are adaptive to the current operating condition of the air conditioner, and the capacity output of the air conditioner is more stable.
In addition, under the condition that the use scene of the air conditioner is not changed, namely the use working condition of the air conditioner is not changed, the maximum operation frequency is reduced, and meanwhile, the defrosting operation period is prolonged, so that the starting frequency of a defrosting mode is reduced, the frequency of switching the four-way valve by the air conditioner is reduced, and the service life of the air conditioner is prolonged.
In addition, the defrosting operation period is prolonged, so that the influence of frequent operation of the air conditioner in a defrosting mode on the use of a user in the operation process of the air conditioner is reduced.
In any of the embodiments above, the adjusting unit 408 is specifically configured to: acquiring a first adjustment coefficient; determining a first adjusting value according to the first adjusting coefficient and the maximum operating frequency; the maximum operating frequency is adjusted lower according to the first adjustment value.
In the embodiment, a specific scheme for reducing the maximum operating frequency is specifically defined, and the operation according to the scheme is performed, so that the adjustment of the maximum operating frequency can be matched with the current operating state of the air conditioner, and the influence on the operating stability of the air conditioner due to overlarge adjustment amplitude of the maximum operating frequency is avoided.
Specifically, the first adjustment coefficient is a constant, and a value range thereof may be set according to a usage scenario of the air conditioner.
In one embodiment, the first adjustment factor is greater than zero and less than 1.
In one embodiment, the first adjustment value is a product of a first adjustment coefficient and a maximum operating frequency.
In one embodiment, the maximum operating frequency is adjusted to be lower by the first adjustment value, which is to be understood as the first adjustment value is decreased on the basis of the maximum operating frequency in order to obtain the adjusted maximum operating frequency.
In any of the embodiments above, the adjusting unit 408 is specifically configured to: and increasing the maximum operation frequency based on the parameter difference value being smaller than a second preset difference value threshold.
In this embodiment, under the condition that the time interval is lower than the second preset difference threshold, the maximum operating frequency of the current compressor is determined to be lower and not adapted to the current operating condition of the air conditioner, and the operating parameters of the air conditioner are adapted to the current user of the air conditioner by increasing the value of the maximum operating frequency, so that the capacity output of the air conditioner is more stable.
In any of the above embodiments, the adjusting unit 408 is specifically configured to: acquiring a second adjustment coefficient; determining a second adjustment value according to a second adjustment coefficient and the maximum operation frequency; and increasing the maximum operation frequency according to the second adjustment value.
In the embodiment, a specific scheme for increasing the maximum operating frequency is specifically defined, and the operation according to the scheme is performed, so that the adjustment of the maximum operating frequency can be matched with the current operating state of the air conditioner, and the influence on the operating stability of the air conditioner due to overlarge adjustment amplitude of the maximum operating frequency is avoided.
Specifically, the second adjustment coefficient is a constant, and a value range thereof may be set according to a usage scenario of the air conditioner.
In one embodiment, the second adjustment factor is greater than zero and less than 1.
In one embodiment, the second adjustment value is a product of the second adjustment coefficient and the maximum operating frequency.
In one embodiment, increasing the maximum operating frequency by the second adjustment value may be understood as increasing the second adjustment value on the basis of the maximum operating frequency to obtain an adjusted maximum operating frequency.
In any of the above embodiments, the adjusting unit 408 is further configured to: determining a sum of the second adjustment value and the maximum operating frequency; and taking the default maximum operation frequency as the adjusted maximum operation frequency based on the sum value being greater than or equal to the default maximum operation frequency.
In this embodiment, in consideration of the fact that the adjusted maximum operating frequency may exceed the default maximum operating frequency in the process of increasing the maximum operating frequency, it is obvious that the maximum operating frequency already exceeds the frequency at which the compressor can operate in the case that the maximum operating frequency exceeds the default maximum operating frequency, and if the compressor is operated according to the adjusted maximum operating frequency, the probability of the compressor failing may be increased.
According to the embodiment of the application, under the condition that the sum value is larger than or equal to the default maximum operation frequency, the default maximum operation frequency is directly used as the adjusted maximum operation frequency, so that the condition can be avoided, and the operation reliability of the air conditioner can be improved.
In any of the embodiments above, the adjusting unit 408 is specifically configured to: and maintaining the maximum operation frequency unchanged based on the parameter difference value being greater than or equal to the second preset difference threshold value and being less than or equal to the first preset difference threshold value.
In this embodiment, the adjustment frequency of the maximum operating frequency is reduced by keeping the maximum operating frequency constant.
In any of the embodiments above, the adjusting unit 408 is specifically configured to: and adjusting the maximum operation frequency to be the default maximum operation frequency based on the parameter difference value being smaller than a third preset difference value threshold.
In this embodiment, the third preset difference threshold is less than the second preset difference threshold.
In this embodiment, if the parameter difference is lower than the third preset difference threshold, it is determined that the maximum operating frequency is improperly set, so that the heating efficiency of the air conditioner during the operation process is too low, and the performance of the air conditioner is seriously affected.
In any of the above embodiments, the defrost operating period is the time difference between the last time the air conditioner exited the defrost mode and the next time the air conditioner entered the defrost mode.
In any of the embodiments above, the first obtaining unit 402 is specifically configured to: starting timing based on the last time the air conditioner exits the defrosting mode; and acquiring a detection value of the operation parameter based on the timing duration being greater than the preset duration until the air conditioner enters the defrosting mode next time and is stopped, wherein the first detection value is the maximum detection value of the operation parameter in the defrosting operation period.
In the embodiment, the first detection value is defined to belong to the maximum detection value of the operation parameter in the detection process, so that the operation state of the outdoor heat exchanger under the optimal heat exchange efficiency can be represented by using the first detection value, and the determined parameter difference value can accurately represent the maximum attenuation degree of the heat exchange capacity of the outdoor heat exchanger.
In the above embodiment, by timing, and when the timing duration reaches the preset duration, the detection value of the operation parameter is obtained, so as to avoid the influence of the defrosting mode on the first detection value within the preset duration when the air conditioner finishes operating the defrosting mode.
In any of the above embodiments, the predetermined period of time is 5 minutes to 10 minutes.
In any of the above embodiments, the second detection value is a minimum detection value of the operation parameter during the defrosting operation period.
In any of the above embodiments, the operating parameters include: coil temperature or vapor pressure.
Example eight
According to an embodiment of the present invention, there is provided a readable storage medium on which a program or instructions are stored, which when executed by a processor, implement the steps of the frequency adjustment method as in any one of the above.
The embodiment of the present application provides a readable storage medium, which can implement the steps of the frequency adjustment method as described above, and therefore, has all the beneficial technical effects of the frequency adjustment method.
Example nine
According to an embodiment of the present invention, there is provided an air conditioner including: the frequency adjusting device is provided; or a readable storage medium as described above.
The embodiment of the application provides an air conditioner, which comprises the frequency adjusting device; or the readable storage medium, and therefore, all the advantageous technical effects of the frequency adjustment apparatus or the readable storage medium are provided, and are not described herein again.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (14)

1. A frequency adjustment method for a compressor in an air conditioner including an outdoor heat exchanger, comprising:
acquiring the maximum operating frequency of the compressor and a first detection value of the operating parameter of the outdoor heat exchanger in the current defrosting operation period;
acquiring a second detection value of the air conditioner before the air conditioner enters a defrosting mode;
determining a parameter difference value according to the first detection value and the second detection value;
adjusting the maximum operation frequency according to the comparison result of the parameter difference and a preset difference threshold value, so that the adjusted maximum operation frequency is used as the maximum operable frequency of the compressor in the next defrosting operation period;
the defrosting operation period is the time difference from the last time the air conditioner exits the defrosting mode to the next time the air conditioner enters the defrosting mode;
starting timing based on the last time the air conditioner exits the defrosting mode;
and acquiring the detection value of the operation parameter based on the timing duration being longer than the preset duration until the air conditioner enters the defrosting mode next time.
2. The frequency adjustment method of claim 1,
and reducing the maximum operation frequency based on the parameter difference value being larger than a first preset difference value threshold.
3. The method of claim 2, wherein reducing the maximum operating frequency comprises:
acquiring a first adjustment coefficient;
determining a first adjusting value according to the first adjusting coefficient and the maximum running frequency;
and reducing the maximum operation frequency according to the first adjustment value.
4. The frequency adjustment method of claim 1,
and increasing the maximum operation frequency based on the parameter difference value being smaller than a second preset difference value threshold.
5. The method of claim 4, wherein the step of increasing the maximum operating frequency comprises:
acquiring a second adjustment coefficient;
determining a second adjustment value according to the second adjustment coefficient and the maximum operation frequency;
and increasing the maximum operating frequency according to the second adjusting value.
6. The method of claim 5, further comprising:
determining a sum of the second adjustment value and the maximum operating frequency;
based on the sum being greater than or equal to a default maximum operating frequency, taking the default maximum operating frequency as the adjusted maximum operating frequency.
7. The frequency adjustment method of claim 1,
and maintaining the maximum operation frequency unchanged based on the parameter difference value being greater than or equal to a second preset difference value threshold and being less than or equal to a first preset difference value threshold.
8. The frequency adjustment method of claim 1,
and adjusting the maximum operation frequency to be a default maximum operation frequency based on the parameter difference being smaller than a third preset difference threshold.
9. The frequency adjustment method of claim 1,
the first detection value is the maximum detection value of the operation parameter in the defrosting operation period.
10. The frequency adjustment method according to any one of claims 1 to 8,
the second detection value is the minimum detection value of the operation parameter in the defrosting operation period.
11. The frequency adjustment method according to any one of claims 1 to 8, wherein the operation parameter includes: coil temperature or evaporation pressure.
12. A frequency adjustment device for a compressor in an air conditioner including an outdoor heat exchanger, comprising:
the first acquisition unit is used for acquiring the maximum operation frequency of the compressor and a first detection value of the operation parameter of the outdoor heat exchanger in the current defrosting operation period;
the second acquisition unit is used for acquiring a second detection value of the air conditioner before the air conditioner enters a defrosting mode;
a calculation unit for determining a parameter difference value from the first detection value and the second detection value;
the adjusting unit is used for adjusting the maximum operating frequency according to the comparison result of the parameter difference value and a preset difference value threshold value, so that the adjusted maximum operating frequency is used as the maximum operable frequency of the compressor in the next defrosting operation period;
wherein, the defrosting operation period is the time difference from the last time the air conditioner exits the defrosting mode to the next time the air conditioner enters the defrosting mode;
the first obtaining unit is specifically configured to: starting timing based on the last time the air conditioner exits the defrosting mode; and acquiring the detection value of the operation parameter based on the timing duration being longer than the preset duration until the air conditioner enters the defrosting mode next time.
13. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the frequency adjustment method according to any one of claims 1 to 11.
14. An air conditioner, comprising:
the frequency adjustment apparatus of claim 12; or
The readable storage medium of claim 13.
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