WO2023029653A1 - Procédé de commande de dégivrage pour unité extérieure de climatiseur, et climatiseur - Google Patents

Procédé de commande de dégivrage pour unité extérieure de climatiseur, et climatiseur Download PDF

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Publication number
WO2023029653A1
WO2023029653A1 PCT/CN2022/098667 CN2022098667W WO2023029653A1 WO 2023029653 A1 WO2023029653 A1 WO 2023029653A1 CN 2022098667 W CN2022098667 W CN 2022098667W WO 2023029653 A1 WO2023029653 A1 WO 2023029653A1
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WIPO (PCT)
Prior art keywords
air conditioner
air
defrosting
compressor
indoor unit
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PCT/CN2022/098667
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English (en)
Chinese (zh)
Inventor
阚荣强
任滔
刘江彬
孟庆良
刘景升
宋强
荣丹
Original Assignee
青岛海尔空调电子有限公司
青岛海尔空调器有限总公司
海尔智家股份有限公司
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Publication of WO2023029653A1 publication Critical patent/WO2023029653A1/fr

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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
    • F24F11/42—Defrosting; Preventing freezing of outdoor 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the invention relates to the technical field of air conditioners, and specifically provides a defrosting control method for an outdoor unit of the air conditioner and the air conditioner.
  • the air conditioner consists of two parts: the indoor unit of the air conditioner and the outdoor unit of the air conditioner.
  • the outdoor unit of the air conditioner When the air conditioner heats the room in winter, the outdoor unit of the air conditioner is used as an evaporator to absorb the heat from the outside, and the indoor unit of the air conditioner is used as a condenser to release heat to the room. heat.
  • the indoor unit of the air conditioner is used as a condenser to release heat to the room. heat.
  • Chinese patent application document discloses a defrosting control method for an air conditioner: when the air conditioner is in the heating mode, obtain the surface temperature of the outdoor heat exchanger; obtain the moisture content of the incoming air of the outdoor heat exchanger The amount of moisture and the moisture content of the air outlet; determine the frosting thickness of the outdoor heat exchanger based on the humidity content of the inlet air and the humidity of the outlet air; judge whether to enter the defrosting mode of the air conditioner according to the surface temperature and the thickness of the frosting.
  • this field needs a new defrosting control method for the outdoor unit of the air conditioner to solve the problem that the timing of defrosting the outdoor unit of the air conditioner in the existing air conditioner does not match the actual demand, thus affecting the performance and performance of the air conditioner.
  • User experience issues
  • the present invention aims to solve the above-mentioned technical problem, that is, to solve the problem that the timing of defrosting the outdoor unit of the air conditioner in the existing air conditioner does not match the actual demand, thereby affecting the working performance of the air conditioner and user experience.
  • the present invention provides a defrosting control method for an outdoor unit of an air conditioner, including:
  • the air conditioner is controlled to enter the defrosting mode.
  • the step of "obtaining the real-time heating capacity Q of the indoor unit of the air conditioner” includes:
  • the refrigerant flow rate m per unit time in the air conditioner system is obtained by a calculation method, which specifically includes:
  • ⁇ is the heat loss coefficient
  • P comp is the power consumed by the compressor
  • h d is the exhaust enthalpy of the compressor
  • h s is the suction enthalpy of the compressor.
  • the discharge enthalpy value h d of the compressor and the suction enthalpy value h s of the compressor are obtained by calculation, and the obtaining method is specific include:
  • h d p 1 +p 2 ⁇ P d +p 3 ⁇ T d +p 4 ⁇ P d 2 +p 5 ⁇ P d ⁇ T d +p 6 ⁇ T d 2 ; among them, p 1 to p 6 are h The fitting coefficient corresponding to d ;
  • h s s 1 +s 2 P s +s 3 T s +s 4 P s 2 +s 5 P s T s +s 6 T s 2 , where s 1 to s 6 are h The fitting coefficient corresponding to s .
  • the enthalpy value h in of the inlet refrigerant of the indoor unit and the enthalpy value h out of the outlet refrigerant h out of the indoor unit are obtained by calculation, and the calculation formulas are respectively:
  • h in e 1 +e 2 ⁇ P in +e 3 ⁇ T in +e 4 ⁇ P in 2 +e 5 ⁇ P in ⁇ T in +e 6 ⁇ T in 2 ;
  • P in is the pressure of the refrigerant inlet of the indoor unit
  • T in is the temperature of the refrigerant inlet of the indoor unit;
  • h out k 1 +k 2 P out +k 3 T out +k 4 P out 2 +k 5 P out T out +k 6 T out 2 ; where k 1 to k 6 are h out
  • P out is the pressure of the refrigerant outlet of the indoor unit
  • T out is the temperature of the refrigerant outlet of the indoor unit.
  • the acquisition method of P in and P out is calculation, and the calculation method of the pressure P in of the refrigerant inlet of the indoor unit is:
  • ⁇ P d The calculation formula of ⁇ P d is: Wherein ⁇ 1 is the first resistance factor; ⁇ d is the exhaust density of the compressor; D 1 is the inner diameter of the discharge pipe of the compressor;
  • ⁇ d n 1 +n 2 ⁇ P d +n 3 ⁇ P d 2 +n 4 ⁇ P d 3 +n 5 ⁇ P d 4 +n 6 ⁇ P d 5 ;
  • n 1 to n6 is the fitting coefficient corresponding to ⁇ d ;
  • ⁇ P in is: Wherein ⁇ 2 is the second resistance factor; ⁇ in is the inlet refrigerant density of the indoor unit; D 2 is the inner diameter of the heat exchange tube of the indoor unit;
  • ⁇ in r 1 +r 2 ⁇ P in +r 3 ⁇ P in 2 +r 4 ⁇ P in 3 +r 5 ⁇ P in 4 +r 6 ⁇ P in 5 ; among them, P in is the refrigerant inlet pressure of the indoor unit, where r 1 to r 6 are fitting coefficients corresponding to ⁇ in .
  • the step of "obtaining the real-time average power Q dfmean required for defrosting" includes:
  • the step of "obtaining the frosting amount m f of the outdoor heat exchanger" includes:
  • the actual frosting amount m f of the outdoor heat exchanger at the frosting time t 2 is calculated based on the frosting speed m' f (t 2 ), and the calculation formula used is:
  • the calculation formula used to calculate the frosting speed m' f (t 2 ) of the outdoor heat exchanger based on the condensation speed m' w (t 2 ) and the frosting factor f is:
  • c p, v is the specific heat capacity of water vapor at constant pressure
  • T w1 is the wet bulb temperature of the air on the inlet side
  • T w2 is the wet bulb temperature of the air on the outlet side
  • T d1 is the dry bulb temperature of the air on the inlet side
  • T d2 is the dry bulb temperature of the air on the outlet side
  • d s1 is the saturated moisture content of the air on the inlet side corresponding to the dry bulb temperature
  • d s2 is the saturated moisture content of the air on the outlet side corresponding to the dry bulb temperature
  • ⁇ is water latent heat of vaporization
  • the step of obtaining the actual air volume Q(t 2 ) includes:
  • parameters a, b, and c are related to the structure of the outdoor heat exchanger itself, and are determined by data fitting.
  • the standard air volume Q std is the normal air volume of the outdoor heat exchanger when it is not affected by frosting factors. Air volume.
  • the present invention also provides an air conditioner, the air conditioner includes a memory, a processor, and an air conditioner defrosting control program stored in the memory and operable on the processor, the air conditioner defrosting control program is controlled by The processor implements the steps of the defrosting control method for the outdoor unit of the air conditioner described in any one of the above technical solutions when executed.
  • the defrosting control method of the outdoor unit of the air conditioner of the present invention includes: obtaining the real-time heating capacity Q of the indoor unit of the air conditioner; obtaining the real-time average power Q dfmean required for defrosting; When Q ⁇ Q dfmean , the air conditioner is controlled to enter the defrosting mode.
  • the present invention obtains the real-time heating capacity Q of the indoor unit of the air conditioner and the real-time average power Q dfmean required for defrosting, and controls the air conditioner to enter the defrosting mode when Q ⁇ Q dfmean .
  • the heating capacity of the indoor unit of the air conditioner will continue to attenuate, and the continuous thickening of the frost layer will reduce the power required for defrosting.
  • the present invention immediately controls the air conditioner to run the defrosting program for defrosting.
  • the running time of the defrosting program of this scheme is more accurate, and the defrosting point can be reasonably judged.
  • Fig. 1 is the flow chart of main steps of the defrosting control method of the air conditioner outdoor unit of the present invention
  • Fig. 2 is a flowchart of the steps of obtaining the real-time heating capacity Q of the indoor unit of the air conditioner according to the present invention
  • Fig. 3 is a flow chart of the steps of obtaining the real-time average power Qdfmean needed for defrosting in the present invention
  • Fig. 4 is a flow chart of the steps of obtaining the frosting amount m f of the outdoor heat exchanger according to the present invention.
  • this embodiment provides a defrosting method for the outdoor unit of the air conditioner. Frost control method and air conditioner.
  • the defrosting control method of the outdoor unit of the air conditioner of the present invention comprises:
  • Step S1 Obtain the real-time heating capacity Q of the indoor unit of the air conditioner
  • Step S2 Obtain the real-time average power Q dfmean required for defrosting
  • Step S3 When Q ⁇ Q dfmean , control the air conditioner to enter the defrosting mode.
  • the step of "obtaining the real-time heating capacity Q of the indoor unit of the air conditioner” includes:
  • Step S11 Obtain the refrigerant flow rate m per unit time in the air conditioner system
  • Step S12 Obtain the enthalpy value h in of the inlet refrigerant and the enthalpy value h out of the outlet refrigerant of the indoor unit of the air conditioner;
  • the refrigerant flow rate m per unit time in the air conditioner system, the inlet refrigerant enthalpy value h in and the outlet refrigerant enthalpy value h out of the air conditioner indoor unit can be directly detected and obtained by sensors when the air conditioner is running, or can be Calculated by formula.
  • the refrigerant flow rate m per unit time in the air conditioner system is obtained by calculation, which greatly reduces the overall number of sensors in the air conditioner system, reduces the cost, and greatly reduces the damage rate of parts.
  • the following calculation method replaces the detection
  • the calculation method of refrigerant flow m includes:
  • ⁇ is the heat loss coefficient, generally ranging from 0.9 to 1;
  • P comp is the power consumed by the compressor;
  • h d (unit is KJ/kg) is the exhaust enthalpy of the compressor;
  • h s (unit is KJ/kg ) is the suction enthalpy of the compressor.
  • the power P comp consumed by the compressor, the exhaust enthalpy h d of the compressor and the suction enthalpy h s of the compressor can be directly detected by the sensor when the air conditioner is running, or can be obtained by calculated by the formula.
  • the discharge enthalpy value h d of the compressor and the suction enthalpy value h s of the compressor are obtained by calculation, and the obtaining methods specifically include:
  • the suction pressure P s of the compressor obtain the discharge temperature T d of the compressor and the suction temperature T s of the compressor; preferably, use the self-contained
  • the sensor directly detects the values of P d , P s , T d and T s ;
  • h d p 1 +p 2 ⁇ P d +p 3 ⁇ T d +p 4 ⁇ P d 2 +p 5 ⁇ P d ⁇ T d +p 6 ⁇ T d 2 ; among them, p 1 to p 6 are table The fitting coefficient corresponding to h d in 1;
  • h s s 1 +s 2 ⁇ P s +s 3 ⁇ T s +s 4 ⁇ P s 2 +s 5 ⁇ P s ⁇ T s +s 6 ⁇ T s 2 ;
  • s 1 to s 6 are table The fitting coefficient corresponding to h s in 2.
  • Table 1 Fitting coefficient table of compressor exhaust enthalpy h d
  • Table 2 Fitting coefficient table of compressor suction enthalpy h s
  • the enthalpy value h in of the inlet refrigerant of the indoor unit and the enthalpy value h out of the outlet refrigerant of the indoor unit are obtained by calculation, and the calculation formulas are respectively:
  • h in e 1 +e 2 ⁇ P in +e 3 ⁇ T in +e 4 ⁇ P in 2 +e 5 ⁇ P in ⁇ T in +e 6 ⁇ T in 2 ; among them, e 1 to e 6 are table Fitting coefficient corresponding to h in in 3; P in (unit is Kpa) is the pressure of the refrigerant inlet of the indoor unit, T in (unit is °C) is the temperature of the refrigerant inlet of the indoor unit;
  • h out k 1 +k 2 P out +k 3 T out +k 4 P out 2 +k 5 P out T out +k 6 T out 2 ;
  • k 1 to k 6 are Table 4
  • P out (in Kpa) is the pressure of the refrigerant outlet of the indoor unit
  • T out (in °C) is the temperature of the refrigerant outlet of the indoor unit.
  • Table 3 Fitting coefficient table of the inlet refrigerant enthalpy h in of the indoor unit
  • Table 4 Fitting coefficient table of the outlet refrigerant enthalpy h out of the indoor unit
  • the pressure P in of the refrigerant inlet of the indoor unit, the pressure P out of the refrigerant outlet of the indoor unit, the temperature T in of the refrigerant inlet of the indoor unit, and the temperature T out of the refrigerant outlet of the indoor unit can be directly measured by sensors when the air conditioner is running.
  • the detection acquisition can also be calculated by a formula.
  • the temperature T in of the refrigerant inlet of the indoor unit and the temperature T out of the refrigerant outlet of the indoor unit are directly detected and obtained by setting temperature sensors at the inlet and outlet of the indoor unit.
  • the method of obtaining P in and P out is calculation, and the calculation method of the pressure P in of the refrigerant inlet of the indoor unit is:
  • ⁇ 1 is the first resistance factor, which is related to the size, shape and connection mode of the pipeline;
  • ⁇ d (unit is kg/m 3 ) is the discharge density of the compressor;
  • D 1 is the inner diameter of the discharge pipe of the compressor;
  • ⁇ d n 1 +n 2 ⁇ P d +n 3 ⁇ P d 2 +n 4 ⁇ P d 3 +n 5 ⁇ P d 4 +n 6 ⁇ P d 5 ;
  • n 1 To n6 is the fitting coefficient corresponding to ⁇ d in Table 5;
  • ⁇ 2 is the second resistance factor, which is related to the size, shape and connection mode of the pipe;
  • ⁇ in (unit: kg/m 3 ) is the density of refrigerant at the inlet of the indoor unit;
  • D 2 is the inner diameter of the heat exchange tube of the indoor unit;
  • ⁇ in r 1 +r 2 ⁇ P in +r 3 ⁇ P in 2 +r 4 ⁇ P in 3 +r 5 ⁇ P in 4 +r 6 ⁇ P in 5 ;
  • P in (unit: Mpa) is the refrigerant inlet pressure of the indoor unit, where r 1 to r 6 are the fitting coefficients corresponding to ⁇ in in Table 6.
  • Table 5 Fitting coefficient table of exhaust gas density ⁇ d of the compressor
  • Table 6 Fitting coefficient table of the inlet refrigerant density ⁇ in of the indoor unit
  • the fitting coefficients p 1 to p 6 , s 1 to s 6 , e 1 to e 6 , k 1 to k 6 , n 1 to n 6 , and r 1 to r 6 are all related to the type of refrigerant.
  • the type of refrigerant in this embodiment is R410a.
  • the step of "obtaining the real-time average power Q dfmean required for defrosting" includes:
  • Step S21 Obtain the frosting amount m f of the outdoor heat exchanger
  • Step S22 According to the formula Calculate the average power required for defrosting
  • the unit of the real-time average power Q dfmean required for defrosting is (J), Is the defrosting rate factor, dimensionless, related to the performance of the machine; I (in J/kg) is the heat of solution; t 1 (in s) is the time required for defrosting, which usually limits the defrosting time Within a certain range, for example, 180 to 300s; the unit of actual frosting m f is (kg).
  • the frosting amount m f of the outdoor heat exchanger can be directly detected and obtained by a sensor, or can be calculated by a formula.
  • the step of "obtaining the frosting amount m f of the outdoor heat exchanger" by calculation includes:
  • Step S211 Obtain the actual air volume Q(t 2 ), the actual humidity d in of the air on the inlet side, and the actual air content in the air on the outlet side of the outdoor unit of the air conditioner at the frosting time t 2 since the last defrosting was completed. Humidity d out , and obtain the surface temperature T def of the outdoor heat exchanger of the outdoor unit of the air conditioner;
  • Step S212 Calculate the condensation speed m' w (t 2 ) of the outdoor heat exchanger based on the actual air volume Q(t 2 ), the actual humidity d in of the air on the inlet side, and the actual humidity d out of the air on the outlet side, And determine the frosting factor f based on the surface temperature T def of the outdoor heat exchanger;
  • Step S213 Calculate the frosting speed m' f (t 2 ) of the outdoor heat exchanger based on the condensation speed m' w (t 2 ) and the frosting factor f ;
  • Step S214 Calculate the actual frosting amount m f of the outdoor heat exchanger at the frosting time t 2 based on the frosting speed m' f (t 2 ).
  • the actual air volume Q(t 2 ), the actual moisture content d in of the air on the inlet side, the actual humidity content of the air on the outlet side d out , and the surface temperature T def of the outdoor heat exchanger of the outdoor unit of the air conditioner can all be It can be obtained through direct detection or calculation, so there is no restriction on the method of acquisition.
  • the calculation formula used to calculate the frosting speed m' f (t 2 ) of the outdoor heat exchanger based on the condensation speed m' w (t 2 ) and the frosting factor f is:
  • the calculation formula for calculating the condensation speed m' w (t 2 ) of the outdoor heat exchanger is:
  • c p, a is the specific heat capacity of dry air at constant pressure.
  • the specific heat capacity of air at constant pressure at 20 °C is 1.004 kJ/(kg K)
  • ⁇ is the density of air. Under standard conditions (0 °C , 1 standard atmospheric pressure (1atm)), the air density is about 1.29Kg/m3;
  • c p, v is the specific heat capacity of water vapor at constant pressure
  • the reference value is 1.865kJ/(kg K)
  • T w1 (unit is °C) is the wet bulb temperature of the air on the air inlet side, that is, the wet bulb temperature of the external environment, It can be measured by the relative humidity sensor, and the wet bulb temperature of the local external environment can also be obtained through the cloud server.
  • T w2 (unit is °C) is the wet bulb temperature of the air on the outlet side
  • T d1 (unit is °C)
  • T d2 (in °C) is the dry bulb temperature of the air on the outlet side, which can be directly measured by a sensor or calculated by detecting the suction pressure of the outdoor heat exchanger
  • d s1 is the air inlet Side air corresponds to the saturated moisture content at the dry bulb temperature
  • d s2 is the saturated moisture content of the air outlet side corresponding to the dry bulb temperature
  • the step of "determining the frosting factor f based on the surface temperature T def of the outdoor heat exchanger" includes:
  • the steps for obtaining the actual air volume Q(t 2 ) include:
  • the parameters a, b and c are related to the structure of the outdoor heat exchanger and determined by data fitting.
  • the standard air volume Q std is the normal air volume of the outdoor heat exchanger when it is not affected by frosting factors. It can be determined by the air volume experiment when the air conditioner products leave the factory. Wherein, the unit of the standard air volume Q std is (m 3 /s), the unit of the actual air volume Q(t 2 ) is (m 3 /s), and the unit of the actual frosting amount m f is (kg).
  • the advantage of the above setting method is that the defrosting control method of the outdoor unit of the air conditioner of the present invention utilizes the existing layout of the outdoor unit of the air conditioner without adding additional measurement equipment for the mass flow rate of the refrigerant and without increasing the cost of the air conditioner.
  • the temperature sensor, humidity sensor, and wet bulb temperature on the cloud service are used as input, combined with heating capacity calculation and defrosting power calculation, the calculation method is simple, does not require a huge amount of calculation, reduces the burden on the controller, and thus accurately Judging the timing of entering the defrosting program, so as to maximize the energy efficiency of the capacity within a certain period of time, and prevent the overall energy efficiency of the air conditioner from decreasing due to the continued operation of the heating efficiency lower than the defrosting efficiency.
  • the actual air volume of the outdoor unit of the air conditioner is added to the calculation of the amount of frosting, so that the calculation of the amount of frosting is more accurate, and the influence of air volume on the thickness of frosting is reduced, thereby increasing the accuracy of the timing of the defrosting program .
  • the air conditioner of the present invention can obviously be various types of air conditioners.
  • it may be a room air conditioner, a unitary air conditioner, or a multi-connected air conditioner, etc. Therefore, there is no limitation on the type of the air conditioner.
  • the present invention also provides an air conditioner, which includes a memory, a processor, and an air-conditioning defrosting control program stored on the memory and operable on the processor.
  • an air conditioner which includes a memory, a processor, and an air-conditioning defrosting control program stored on the memory and operable on the processor.
  • the air-conditioning defrosting control program is executed by the processor, the The steps of the defrosting control method in any one of the above implementation manners. It can be understood that since the air conditioner provided in this embodiment includes any implementation of the defrosting control method for the outdoor unit of the air conditioner described above, it must have the relevant advantages of the defrosting control method for the outdoor unit of the air conditioner described above, So I won't repeat them here.

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Abstract

La présente invention concerne un procédé de commande de dégivrage pour une unité extérieure d'un climatiseur. Le procédé comprend les étapes consistant à : acquérir une capacité de chauffage en temps réel Q d'une unité intérieure d'un climatiseur ; acquérir une puissance moyenne en temps réel Qdfmean requise pour le dégivrage ; et lorsque Q ＜ Qdfmean, commander le climatiseur pour qu'il entre dans un mode de dégivrage. Lorsqu'une capacité de chauffage en temps réel d'une unité intérieure d'un climatiseur est inférieure à une puissance moyenne en temps réel requise pour le dégivrage, le climatiseur est immédiatement commandé pour qu'il actionne un programme de dégivrage pour le dégivrage. Un point de dégivrage est déterminé de manière rationnelle, et une occasion est plus précise, ce qui permet d'améliorer l'expérience d'utilisation d'un utilisateur, d'empêcher une diminution de l'efficacité énergétique globale provoquée par une capacité de chauffage diminuant pour être inférieure à la puissance consommée par le dégivrage, et ainsi de garantir l'efficacité énergétique pendant le fonctionnement du climatiseur.
PCT/CN2022/098667 2021-08-31 2022-06-14 Procédé de commande de dégivrage pour unité extérieure de climatiseur, et climatiseur WO2023029653A1 (fr)

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CN115111723B (zh) * 2022-06-21 2023-12-19 珠海格力电器股份有限公司 一种空调器的控制方法、控制装置和空调器

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