EP3734178A1 - Control method for air conditioner - Google Patents

Control method for air conditioner Download PDF

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Publication number
EP3734178A1
EP3734178A1 EP18895635.3A EP18895635A EP3734178A1 EP 3734178 A1 EP3734178 A1 EP 3734178A1 EP 18895635 A EP18895635 A EP 18895635A EP 3734178 A1 EP3734178 A1 EP 3734178A1
Authority
EP
European Patent Office
Prior art keywords
indoor unit
compressor
temperature
preset temperature
air conditioner
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.)
Granted
Application number
EP18895635.3A
Other languages
German (de)
French (fr)
Other versions
EP3734178B1 (en
EP3734178A4 (en
Inventor
Chao AN
Chao GU
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 Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Air Conditioning Electric Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioning Electric Co Ltd
Publication of EP3734178A1 publication Critical patent/EP3734178A1/en
Publication of EP3734178A4 publication Critical patent/EP3734178A4/en
Application granted granted Critical
Publication of EP3734178B1 publication Critical patent/EP3734178B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F24F11/43—Defrosting; Preventing freezing of indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • 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
    • F25B2500/27—Problems to be solved characterised by the stop of the refrigeration cycle
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21156—Temperatures of a compressor or the drive means therefor of the motor
    • F25B2700/21157—Temperatures of a compressor or the drive means therefor of the motor at the coil or rotor
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator

Definitions

  • the present disclosure belongs to the technical field of air conditioners, and in particular relates to a control method for an air conditioner.
  • An air conditioner is an apparatus that is capable of cooling or heating an indoor environment.
  • an indoor unit may freeze due to various reasons such as low indoor and outdoor ambient temperatures, long piping connection, and lack of freon, which in turn causes undesired phenomena such as poor cooling effect, water leakage, and pipe cracks, thus seriously affecting the user experience.
  • the present disclosure provides a control method for an air conditioner, wherein the air conditioner includes a compressor and an indoor unit, and the control method includes: acquiring a coil temperature of the indoor unit; and selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit.
  • the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit” includes: operating the compressor at a decreased frequency, if the coil temperature of the indoor unit is lower than a first preset temperature.
  • the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit” further includes: maintaining the operating frequency of the compressor unchanged, if the coil temperature of the indoor unit is higher than or equal to the first preset temperature and lower than or equal to a second preset temperature, the first preset temperature being lower than the second preset temperature.
  • the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit” further includes: operating the compressor at an increased frequency, if the coil temperature of the indoor unit is higher than the second preset temperature and lower than or equal to a third preset temperature, the second preset temperature being lower than the third preset temperature.
  • control method further includes: after the compressor has been operated for a first preset duration, if the coil temperature of the indoor unit is lower than a fourth preset temperature for a second preset duration, stopping the operation of the compressor for a third preset duration.
  • control method further includes: after stopping the operation, if the coil temperature of the indoor unit becomes higher than or equal to a fifth preset temperature, resuming the operation of the compressor, the fourth preset temperature being lower than the fifth preset temperature.
  • the coil temperature of the indoor unit is acquired; that is, when the coil temperature of the indoor unit is lower than the first preset temperature, the compressor is operated at a decreased frequency; when the coil temperature of the indoor unit is higher than or equal to the first preset temperature and lower than or equal to the second preset temperature, the operating frequency of the compressor is maintained unchanged; and when the coil temperature of the indoor unit is higher than the second preset temperature and lower than or equal to the third preset temperature, the compressor is operated at an increased frequency.
  • the frequency of the compressor can be adjusted according to the coil temperature of the indoor unit in practical applications, thereby ensuring that the indoor unit does not freeze and further effectively realizing anti-freezing protection for the air conditioner during the cooling operation.
  • the present disclosure provides a control method for an air conditioner, which aims to avoid the freezing of the indoor unit of the air conditioner, and thus effectively solve the problem that the indoor unit is easy to freeze.
  • FIG. 1 is a schematic flowchart of a control method for an air conditioner of the present disclosure.
  • the present disclosure provides a control method for an air conditioner, wherein the air conditioner includes a compressor and an indoor unit, and the control method includes: acquiring a coil temperature of the indoor unit; and selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit.
  • the coil temperature of the indoor unit will also change accordingly.
  • the frequency of the compressor can be controlled differently.
  • the coil temperature of the indoor unit can be detected in real time by an indoor unit coil sensor.
  • the coil temperature of the indoor unit may also be an experimental value obtained by those skilled in the art based on experiments under specific working conditions, or an empirical value obtained from experience. That is, those skilled in the art can choose any method to obtain the coil temperature of the indoor unit according to the actual situation, as long as the operating frequency of the compressor can be adjusted according to the change of the coil temperature of the indoor unit.
  • the frequency of the compressor the compressor can be always operated within a suitable frequency range, which not only can ensure the cooling effect, but also can prevent the indoor unit of the air conditioner from freezing.
  • the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit” includes: operating the compressor at a decreased frequency, if the coil temperature of the indoor unit is lower than a first preset temperature. That is, according to the setting of the first preset temperature, an initial conclusion of operating the compressor at a decreased frequency can be given.
  • a first preset temperature e.g., a first preset temperature
  • Those skilled in the art can flexibly set the specific value of the first preset temperature in practical applications, as long as the boundary point determined by the first preset temperature can give the conclusion that the compressor needs to be operated at a decreased frequency, and the indoor unit of the air conditioner will not freeze after the adjustment of the operating frequency of the compressor.
  • the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit” further includes: maintaining the operating frequency of the compressor unchanged, if the coil temperature of the indoor unit is higher than or equal to the first preset temperature and lower than or equal to a second preset temperature, the first preset temperature being lower than the second preset temperature. Similar to the first preset temperature, those skilled in the art can flexibly set the specific value of the second preset temperature in practical applications, as long as the boundary points determined by the first preset temperature and the second preset temperature can give the conclusion that the current operating frequency of the compressor needs to be maintained unchanged, and the indoor unit of the air conditioner will not freeze.
  • the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit” further includes: operating the compressor at an increased frequency, if the coil temperature of the indoor unit is higher than the second preset temperature and lower than or equal to a third preset temperature, the second preset temperature being lower than the third preset temperature. Similar to the first preset temperature and the second preset temperature, those skilled in the art can flexibly set the specific value of the third preset temperature in practical applications, as long as the boundary point determined by the third preset temperature can give the conclusion that the compressor needs to be operated at an increased frequency, and the indoor unit of the air conditioner will not freeze after the adjustment of the operating frequency of the compressor.
  • the coil temperature of the indoor unit can be divided into different temperature intervals, and the compressor can be adjusted accordingly within each temperature interval and the compressor can be operated at the most suitable frequency. This method is more advantageous for the adjustment of the compressor frequency.
  • a situation that the operating frequency of the compressor is too high or too low can be effectively avoided, thereby preventing the indoor unit of the air conditioner from freezing.
  • the temperature intervals divided according to the first preset temperature, the second preset temperature and the third preset temperature may be further divided.
  • the temperature interval between the first preset temperature and the second preset temperature may be re-divided into multiple temperature sub-intervals, and different adjustment strategies for the compressor frequency are set within the temperature sub-intervals.
  • Those skilled in the art may set the same or different ways of adjusting the compressor frequency according to different temperature intervals in practical applications, so that the air conditioner can be operated stably in different environments and the indoor unit can be effectively prevented from freezing.
  • the compressor frequency when controlling the compressor frequency to increase/decrease, the compressor frequency may be controlled to increase/decrease slowly, or the compressor frequency may be controlled to increase/decrease fast.
  • those skilled in the art may flexibly set the adjustment speed of increasing/decreasing the compressor frequency, as long as the speed setting enables the compressor frequency to smoothly increase/decrease.
  • the fourth preset temperature may be set to be lower than the above first preset temperature.
  • the fourth preset temperature may be an experimental temperature value obtained by those skilled in the art based on experiments under specific working conditions, or may be an empirical temperature value obtained from experience.
  • the first preset duration, the second preset duration and the third preset duration can be flexibly adjusted and set according to actual conditions, as long as the boundary points determined by the above-mentioned first preset duration, the second preset duration, and the third preset duration can optimize the anti-freezing function of the air conditioner.
  • control method further includes: after stopping the operation of the compressor, if the coil temperature of the indoor unit becomes higher than or equal to a fifth preset temperature, resuming the operation of the compressor, the fourth preset temperature being lower than the fifth preset temperature. That is, after the operation of the compressor has been stopped for the third preset duration, if the coil temperature of the indoor unit rises to or above the fifth preset temperature, the operation of the compressor needs to be resumed.
  • the fifth preset temperature may be set to be equal to the above-mentioned third preset temperature. Of course, this is not limiting, and the fifth preset temperature may also be other temperature values.
  • those skilled in the art may flexibly set the specific temperature value of the fifth preset temperature, as long as the boundary point determined by the fifth preset temperature can give the conclusion that the operation of the compressor needs to be resumed, and the operating mode of the compressor and the anti-freezing function of the air conditioner can be optimized.
  • the above control method includes the following steps s1 to s4.
  • steps s1 and s2 may be executed sequentially or simultaneously.
  • steps s1 and s2 may be executed sequentially or simultaneously.
  • steps s1 and s2 may be executed sequentially or simultaneously.
  • the coil temperature TM of the indoor unit is detected by the indoor unit coil temperature sensor disposed on the air conditioner.
  • the first preset temperature is set to 6°C
  • the second preset temperature is set to 8°C
  • the third preset temperature is set to 10°C.
  • the operating frequency of the compressor is adjusted by judging the temperature interval of the indoor unit coil temperature TM. If TM ⁇ 6°C, the frequency of the compressor is decreased at a constant rate of 1Hz/10s; if 6°C ⁇ TM ⁇ 8°C, the frequency of the compressor is maintained unchanged; and if 8°C ⁇ TM ⁇ 10°C, the frequency of the compressor is increased at a constant rate of 1Hz/10s.
  • the operation duration thereof is recorded. After the compressor has been operated for 6 minutes, if TM ⁇ 2°C for 10 seconds, the operation of the compressor is stopped for a minimum duration of 5 minutes and a maximum duration of 9 minutes; when TM rises above 10°C, the normal operation of the compressor is resumed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The air conditioner comprises a compressor and an indoor unit. The method comprises: obtaining a coil temperature of the indoor unit; and selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit. According to the method, the operating frequency of the compressor is adjusted by determining a temperature interval in which the coil temperature of the indoor unit is, so as to avoid the icing of the indoor unit of the air conditioner, thereby effectively solving the icing problem of the indoor unit of the air conditioner, and also improving the operation stability and reliability of the air conditioner.

Description

    FIELD
  • The present disclosure belongs to the technical field of air conditioners, and in particular relates to a control method for an air conditioner.
    • BACKGROUND
  • An air conditioner is an apparatus that is capable of cooling or heating an indoor environment. During the cooling operation of the air conditioner, an indoor unit may freeze due to various reasons such as low indoor and outdoor ambient temperatures, long piping connection, and lack of freon, which in turn causes undesired phenomena such as poor cooling effect, water leakage, and pipe cracks, thus seriously affecting the user experience.
  • Therefore, there is a need in the art for a new control method for an air conditioner to solve the above problems.
    • SUMMARY
  • In order to solve the above problem in the related art, that is, to solve the problem that an indoor unit of the air conditioner may easily freeze to cause phenomena such as poor cooling effect of the air conditioner, water leakage of the air conditioner or pipe cracks, the present disclosure provides a control method for an air conditioner, wherein the air conditioner includes a compressor and an indoor unit, and the control method includes: acquiring a coil temperature of the indoor unit; and selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit.
  • In a preferred technical solution of the above control method, the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit" includes: operating the compressor at a decreased frequency, if the coil temperature of the indoor unit is lower than a first preset temperature.
  • In a preferred technical solution of the above control method, the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit" further includes: maintaining the operating frequency of the compressor unchanged, if the coil temperature of the indoor unit is higher than or equal to the first preset temperature and lower than or equal to a second preset temperature, the first preset temperature being lower than the second preset temperature.
  • In a preferred technical solution of the above control method, the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit" further includes: operating the compressor at an increased frequency, if the coil temperature of the indoor unit is higher than the second preset temperature and lower than or equal to a third preset temperature, the second preset temperature being lower than the third preset temperature.
  • In a preferred technical solution of the above control method, the control method further includes: after the compressor has been operated for a first preset duration, if the coil temperature of the indoor unit is lower than a fourth preset temperature for a second preset duration, stopping the operation of the compressor for a third preset duration.
  • In a preferred technical solution of the above control method, the control method further includes: after stopping the operation, if the coil temperature of the indoor unit becomes higher than or equal to a fifth preset temperature, resuming the operation of the compressor, the fourth preset temperature being lower than the fifth preset temperature.
  • It can be understood by those skilled in the art that in the preferred technical solutions of the present disclosure, the coil temperature of the indoor unit is acquired; that is, when the coil temperature of the indoor unit is lower than the first preset temperature, the compressor is operated at a decreased frequency; when the coil temperature of the indoor unit is higher than or equal to the first preset temperature and lower than or equal to the second preset temperature, the operating frequency of the compressor is maintained unchanged; and when the coil temperature of the indoor unit is higher than the second preset temperature and lower than or equal to the third preset temperature, the compressor is operated at an increased frequency. With these arrangements, that is, by setting values of the first preset temperature, the second preset temperature and the third preset temperature, the frequency of the compressor is adjusted for different temperature intervals. By adopting the above described control method of the present disclosure, the frequency of the compressor can be adjusted according to the coil temperature of the indoor unit in practical applications, thereby ensuring that the indoor unit does not freeze and further effectively realizing anti-freezing protection for the air conditioner during the cooling operation.
    • BRIEF DESCRIPTION OF THE DRAWINGS
    • FIG. 1 is a schematic flowchart of a control method for an air conditioner of the present disclosure;
    • FIG. 2 is a schematic flowchart of a first embodiment of the control method for the air conditioner of the present disclosure; and
    • FIG. 3 is a schematic flowchart of a second embodiment of the control method for the air conditioner of the present disclosure.
    DETAILED DESCRIPTION
  • Hereinafter, preferred embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present disclosure, and are not intended to limit the scope of protection of the present disclosure.
  • It should be noted that in the description of the present disclosure, terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purpose only, and should not be interpreted as indicating or implying relative importance.
  • In view of the problem pointed out in the "BACKGROUND OF THE INVENTION" that the indoor units of existing air conditioners may easily freeze to cause phenomena such as poor cooling effect of the air conditioner, water leakage of the air conditioner or pipe cracks, the present disclosure provides a control method for an air conditioner, which aims to avoid the freezing of the indoor unit of the air conditioner, and thus effectively solve the problem that the indoor unit is easy to freeze.
  • Specifically, reference is made to FIG. 1, which is a schematic flowchart of a control method for an air conditioner of the present disclosure. As shown in FIG. 1, the present disclosure provides a control method for an air conditioner, wherein the air conditioner includes a compressor and an indoor unit, and the control method includes: acquiring a coil temperature of the indoor unit; and selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit.
  • In the present disclosure, with the operation of the air conditioner, the coil temperature of the indoor unit will also change accordingly. According to the different coil temperatures of the indoor unit, the frequency of the compressor can be controlled differently. In practical applications, the coil temperature of the indoor unit can be detected in real time by an indoor unit coil sensor. Of course, the coil temperature of the indoor unit may also be an experimental value obtained by those skilled in the art based on experiments under specific working conditions, or an empirical value obtained from experience. That is, those skilled in the art can choose any method to obtain the coil temperature of the indoor unit according to the actual situation, as long as the operating frequency of the compressor can be adjusted according to the change of the coil temperature of the indoor unit. By adjusting the frequency of the compressor, the compressor can be always operated within a suitable frequency range, which not only can ensure the cooling effect, but also can prevent the indoor unit of the air conditioner from freezing.
  • Preferably, the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit" includes: operating the compressor at a decreased frequency, if the coil temperature of the indoor unit is lower than a first preset temperature. That is, according to the setting of the first preset temperature, an initial conclusion of operating the compressor at a decreased frequency can be given. Those skilled in the art can flexibly set the specific value of the first preset temperature in practical applications, as long as the boundary point determined by the first preset temperature can give the conclusion that the compressor needs to be operated at a decreased frequency, and the indoor unit of the air conditioner will not freeze after the adjustment of the operating frequency of the compressor.
  • Further, the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit" further includes: maintaining the operating frequency of the compressor unchanged, if the coil temperature of the indoor unit is higher than or equal to the first preset temperature and lower than or equal to a second preset temperature, the first preset temperature being lower than the second preset temperature. Similar to the first preset temperature, those skilled in the art can flexibly set the specific value of the second preset temperature in practical applications, as long as the boundary points determined by the first preset temperature and the second preset temperature can give the conclusion that the current operating frequency of the compressor needs to be maintained unchanged, and the indoor unit of the air conditioner will not freeze.
  • Still further, the step of "selectively adjusting the frequency of the compressor according to the coil temperature of the indoor unit" further includes: operating the compressor at an increased frequency, if the coil temperature of the indoor unit is higher than the second preset temperature and lower than or equal to a third preset temperature, the second preset temperature being lower than the third preset temperature. Similar to the first preset temperature and the second preset temperature, those skilled in the art can flexibly set the specific value of the third preset temperature in practical applications, as long as the boundary point determined by the third preset temperature can give the conclusion that the compressor needs to be operated at an increased frequency, and the indoor unit of the air conditioner will not freeze after the adjustment of the operating frequency of the compressor.
  • By setting the first preset temperature, the second preset temperature and the third preset temperature as described above, the coil temperature of the indoor unit can be divided into different temperature intervals, and the compressor can be adjusted accordingly within each temperature interval and the compressor can be operated at the most suitable frequency. This method is more advantageous for the adjustment of the compressor frequency. At the same time, by detecting the coil temperature of the indoor unit in real time and adjusting the compressor frequency in real time, a situation that the operating frequency of the compressor is too high or too low can be effectively avoided, thereby preventing the indoor unit of the air conditioner from freezing.
  • It should be noted that in the above technical solution of the present disclosure, the temperature intervals divided according to the first preset temperature, the second preset temperature and the third preset temperature may be further divided. For example, when the coil temperature of the indoor unit is higher than the first preset temperature and lower than or equal to the second preset temperature, the temperature interval between the first preset temperature and the second preset temperature may be re-divided into multiple temperature sub-intervals, and different adjustment strategies for the compressor frequency are set within the temperature sub-intervals. Those skilled in the art may set the same or different ways of adjusting the compressor frequency according to different temperature intervals in practical applications, so that the air conditioner can be operated stably in different environments and the indoor unit can be effectively prevented from freezing.
  • In addition, it should also be noted that when controlling the compressor frequency to increase/decrease, the compressor frequency may be controlled to increase/decrease slowly, or the compressor frequency may be controlled to increase/decrease fast. In practice, those skilled in the art may flexibly set the adjustment speed of increasing/decreasing the compressor frequency, as long as the speed setting enables the compressor frequency to smoothly increase/decrease.
  • In a preferred embodiment, after the compressor has been operated for a first preset duration, if the coil temperature of the indoor unit is lower than a fourth preset temperature for a second preset duration, the operation of the compressor is stopped for a third preset duration. In practical applications, the fourth preset temperature may be set to be lower than the above first preset temperature. The fourth preset temperature may be an experimental temperature value obtained by those skilled in the art based on experiments under specific working conditions, or may be an empirical temperature value obtained from experience. Those skilled in the art can flexibly set the specific temperature value of the fourth preset temperature in practical applications, as long as the boundary point determined by the fourth preset temperature can give the conclusion that the operation of the compressor needs to be stopped, and the operating mode of the compressor and the anti-freezing function of the air conditioner can be optimized. In addition, the first preset duration, the second preset duration and the third preset duration can be flexibly adjusted and set according to actual conditions, as long as the boundary points determined by the above-mentioned first preset duration, the second preset duration, and the third preset duration can optimize the anti-freezing function of the air conditioner.
  • Further, the control method further includes: after stopping the operation of the compressor, if the coil temperature of the indoor unit becomes higher than or equal to a fifth preset temperature, resuming the operation of the compressor, the fourth preset temperature being lower than the fifth preset temperature. That is, after the operation of the compressor has been stopped for the third preset duration, if the coil temperature of the indoor unit rises to or above the fifth preset temperature, the operation of the compressor needs to be resumed. In practical applications, the fifth preset temperature may be set to be equal to the above-mentioned third preset temperature. Of course, this is not limiting, and the fifth preset temperature may also be other temperature values. In practical applications, those skilled in the art may flexibly set the specific temperature value of the fifth preset temperature, as long as the boundary point determined by the fifth preset temperature can give the conclusion that the operation of the compressor needs to be resumed, and the operating mode of the compressor and the anti-freezing function of the air conditioner can be optimized.
  • In a preferred embodiment, as shown in FIG. 2, the above control method includes the following steps s1 to s4.
    • Step s1, operating the air conditioner in a cooling mode at the maximum capacity.
    • Step s2: acquiring the coil temperature of the indoor unit.
      wherein the coil temperature of the indoor unit may be directly detected by the temperature sensor, or it may be an experimental temperature value obtained by those skilled in the art based on experiments under specific working conditions, or an empirical temperature value obtained from experience.
    • Step s3, dividing the temperature interval of the value of the coil temperature of the indoor unit.
      wherein the temperature interval of the coil temperature of the indoor unit may be divided according to the indoor temperature, or may be divided according to the outdoor ambient temperature, as long as the range determined by the temperature interval enables the operating frequency of the compressor to be adjusted and can prevent the air conditioner from freezing.
    • Step s4: selectively adjusting the frequency of the compressor according to the temperature interval of the coil temperature of the indoor unit.
  • In the above method, steps s1 and s2 may be executed sequentially or simultaneously. Those skilled in the art may flexibly set the execution of steps s1 and s2 in practical applications, as long as the coil temperature of the indoor unit can be acquired through the setting.
  • The technical solution of the present disclosure is further explained below in combination with specific embodiments:
  • In a possible situation, as shown in FIG. 3, after the air conditioner is started, or while the air conditioner is started, the coil temperature TM of the indoor unit is detected by the indoor unit coil temperature sensor disposed on the air conditioner. The first preset temperature is set to 6°C, the second preset temperature is set to 8°C, and the third preset temperature is set to 10°C. The operating frequency of the compressor is adjusted by judging the temperature interval of the indoor unit coil temperature TM. If TM<6°C, the frequency of the compressor is decreased at a constant rate of 1Hz/10s; if 6°C≤TM≤8°C, the frequency of the compressor is maintained unchanged; and if 8°C<TM≤10°C, the frequency of the compressor is increased at a constant rate of 1Hz/10s.
  • During the operation of the compressor, the operation duration thereof is recorded. After the compressor has been operated for 6 minutes, if TM<2°C for 10 seconds, the operation of the compressor is stopped for a minimum duration of 5 minutes and a maximum duration of 9 minutes; when TM rises above 10°C, the normal operation of the compressor is resumed.
  • It should be understood that the specific values of the above parameters do not serve as limitations, but are only used to help understand the solutions.
  • Hitherto, the technical solutions of the present disclosure have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easily understood by those skilled in the art that the scope of protection of the present disclosure is obviously not limited to these specific embodiments. Without departing from the principle of the present disclosure, those skilled in the art can make equivalent changes or replacements to relevant technical features, and the technical solutions after these changes or replacements will fall within the scope of protection of the present disclosure.

Claims (6)

  1. A control method for an air conditioner, the air conditioner comprising a compressor and an indoor unit, wherein the control method comprises:
    acquiring coil temperature of the indoor unit; and
    selectively adjusting frequency of the compressor according to the coil temperature of the indoor unit.
  2. The control method according to claim 1, wherein the step of "selectively adjusting frequency of the compressor according to the coil temperature of the indoor unit" comprises:
    operating the compressor at a decreased frequency, if the coil temperature of the indoor unit is lower than a first preset temperature.
  3. The control method according to claim 2, wherein the step of "selectively adjusting frequency of the compressor according to the coil temperature of the indoor unit" further comprises:
    maintaining the operating frequency of the compressor unchanged, if the coil temperature of the indoor unit is higher than or equal to the first preset temperature and lower than or equal to a second preset temperature, and
    wherein the first preset temperature is lower than the second preset temperature.
  4. The control method according to claim 3, wherein the step of "selectively adjusting frequency of the compressor according to the coil temperature of the indoor unit" further comprises:
    operating the compressor at an increased frequency, if the coil temperature of the indoor unit is higher than the second preset temperature and lower than or equal to a third preset temperature, and
    wherein the second preset temperature is lower than the third preset temperature.
  5. The control method according to claim 1, further comprising:
    after the compressor has been operated for a first preset duration, if the coil temperature of the indoor unit is lower than a fourth preset temperature for a second preset duration, stopping operation of the compressor for a third preset duration.
  6. The control method according to claim 5, further comprising:
    after stopping the operation, if the coil temperature of the indoor unit becomes higher than or equal to a fifth preset temperature, resuming the operation of the compressor,
    wherein the fourth preset temperature is lower than the fifth preset temperature.
EP18895635.3A 2017-12-25 2018-10-18 Control method for air conditioner Active EP3734178B1 (en)

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PCT/CN2018/110793 WO2019128397A1 (en) 2017-12-25 2018-10-18 Control method for air conditioner

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Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108224704A (en) * 2017-12-25 2018-06-29 青岛海尔空调电子有限公司 The control method of air-conditioning
CN109210696B (en) * 2018-09-10 2020-11-03 青岛海尔空调器有限总公司 Control method for anti-freezing protection of air conditioner
CN110567127A (en) * 2019-09-23 2019-12-13 宁波奥克斯电气股份有限公司 air conditioner frequency control method and air conditioner
CN112577155B (en) * 2019-09-27 2022-12-16 广东美的制冷设备有限公司 Control method of air conditioner, air conditioner and computer readable storage medium
CN110736234A (en) * 2019-10-11 2020-01-31 青岛海尔空调器有限总公司 Air conditioner control method and device and air conditioner
CN110686361A (en) * 2019-10-15 2020-01-14 广东美的暖通设备有限公司 Fresh air machine control method, fresh air machine and computer readable storage medium
CN111397101B (en) * 2020-03-16 2021-10-29 珠海格力电器股份有限公司 Air conditioner control method and device, storage medium and air conditioner
CN113446670A (en) * 2020-03-26 2021-09-28 青岛海尔空调电子有限公司 Method for controlling running frequency of compressor
CN111426041B (en) * 2020-04-13 2022-08-19 青岛海尔空调电子有限公司 Method and system for quickly stabilizing frequency of variable frequency air conditioner compressor and air conditioner device
CN111536022B (en) * 2020-04-25 2022-07-22 壹格建筑科技(上海)有限公司 Control method and device for compressor anti-freezing protection and computer readable storage medium
CN111964234B (en) * 2020-07-30 2021-06-29 青岛海尔空调器有限总公司 Method and device for controlling air conditioner compressor and air conditioner
CN112628939A (en) * 2020-12-12 2021-04-09 安徽美博智能科技有限公司 Shared air conditioner anti-freezing protection control method and air conditioner
CN113068546A (en) * 2021-03-31 2021-07-06 广东积微科技有限公司 Air conditioner control method for greenhouse low-temperature refrigeration
CN116134274A (en) * 2021-07-28 2023-05-16 松下知识产权经营株式会社 Air conditioner control method, program, air conditioner control system, and air conditioner
CN113932376B (en) * 2021-09-30 2023-01-20 珠海格力电器股份有限公司 Temperature adjusting unit control method and device and temperature adjusting unit equipment
CN113970168B (en) * 2021-10-20 2022-11-15 珠海格力电器股份有限公司 Compressor control method, compressor control device, electronic equipment and readable storage medium
CN115560450A (en) * 2022-10-21 2023-01-03 青岛海尔空调器有限总公司 Air conditioner and control method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3348758B2 (en) * 1995-06-14 2002-11-20 株式会社富士通ゼネラル Control method of air conditioner
KR101253568B1 (en) * 2005-12-29 2013-04-11 삼성전자주식회사 Air-Conditioning Apparatus And Thereof Method
JP2012057869A (en) * 2010-09-09 2012-03-22 Panasonic Corp Air conditioner
CN103115417B (en) * 2013-03-19 2015-04-01 海尔集团公司 Refrigeration method of low temperature environment air conditioner
CN104566645B (en) * 2014-12-08 2018-06-05 广东美的制冷设备有限公司 Multi-split air conditioner, air-conditioning anti-frost protection method and air-conditioning anti-frost protection system
CN104596036B (en) * 2015-01-12 2017-12-12 广东美的制冷设备有限公司 Anti-freeze control method and device
CN104697118B (en) * 2015-03-11 2018-06-05 广东美的制冷设备有限公司 The adjusting method of air conditioner, the regulating device of air conditioner and air conditioner
CN105157172B (en) * 2015-08-31 2018-03-30 Tcl空调器(中山)有限公司 The control method and device of air conditioner
CN108224704A (en) * 2017-12-25 2018-06-29 青岛海尔空调电子有限公司 The control method of air-conditioning

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US20210071924A1 (en) 2021-03-11
EP3734178B1 (en) 2024-04-10
ES2981485T3 (en) 2024-10-09
PL3734178T3 (en) 2024-09-02
EP3734178A4 (en) 2021-05-05
WO2019128397A1 (en) 2019-07-04

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