WO2019024681A1 - Procédé de contrôle et dispositif d'auto-nettoyage de climatiseur - Google Patents

Procédé de contrôle et dispositif d'auto-nettoyage de climatiseur Download PDF

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WO2019024681A1
WO2019024681A1 PCT/CN2018/096148 CN2018096148W WO2019024681A1 WO 2019024681 A1 WO2019024681 A1 WO 2019024681A1 CN 2018096148 W CN2018096148 W CN 2018096148W WO 2019024681 A1 WO2019024681 A1 WO 2019024681A1
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air conditioner
current
fan
self
preset
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PCT/CN2018/096148
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English (en)
Chinese (zh)
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魏菡
樊明敬
吕福俊
臧金玲
赵丹
周宝娟
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青岛海尔空调器有限总公司
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Publication of WO2019024681A1 publication Critical patent/WO2019024681A1/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

Definitions

  • This paper relates to the field of self-cleaning technology for air conditioners, and in particular relates to a control method and device for self-cleaning of air conditioners.
  • the air in the indoor environment enters the interior of the indoor unit along the air inlet of the indoor unit, and is re-blowed into the indoor environment through the air outlet after the heat exchange piece is exchanged, During this process, impurities such as dust and large particles trapped in the indoor air will enter the indoor unit along with the airflow, although the dust filter installed at the air inlet of the indoor unit can filter most of the dust and particles. However, there will still be a small amount of tiny dust that cannot be completely blocked by filtration. With the long-term use of the air conditioner, the dust will gradually deposit on the surface of the heat exchange sheet, and the dust covering the outer surface of the heat exchanger is inferior in thermal conductivity. It will directly affect the heat exchange between the heat exchange sheet and the indoor air. Therefore, in order to ensure the heat exchange efficiency of the indoor unit, the indoor unit needs to be cleaned regularly.
  • the cleaning method of the indoor unit of the air conditioner in the prior art mainly includes two methods of manual cleaning and self-cleaning of the air conditioner, wherein the self-cleaning method of the air conditioner is mainly divided into a frosting stage and a defrosting stage, wherein, in the condensation In the frost stage, the air conditioner operates in the cooling mode first, and increases the refrigerant output of the indoor heat exchanger, so that the moisture in the indoor air can gradually condense into frost or ice layer on the outer surface of the heat exchanger.
  • the condensed ice layer can be combined with dust to strip the dust from the outer surface of the heat exchanger; afterwards, during the defrosting stage, the air conditioner operates in the heating mode to melt the frost layer condensed on the outer surface of the heat exchanger.
  • the dust will also collect into the water tray with the melted water flow, so that the self-cleaning effect of the air conditioner can be achieved.
  • the inner fan of the indoor unit is generally in a closed state or a continuous low wind speed during the frosting stage, and the actual application process may affect the frosting speed and the frosting effect of the indoor heat exchanger.
  • the inner fan is always off, there is no air circulation on the surface of the heat exchanger, and the moisture content in the air near the heat exchanger is limited, so that the thickness of the frost layer grows slowly; while the inner fan continues to run at a low wind speed. Since there is always air flow on the surface of the indoor heat exchanger, the evaporation pressure is higher than that of the indoor fan, so that the indoor heat exchanger takes a long time to fall below the freezing point and begin to frost. Therefore, the operation state of the internal fan in the existing self-cleaning process of the air conditioner cannot achieve a good function of promoting the frosting.
  • This paper provides a self-cleaning control method and device for air conditioners, which aims to solve the problem that the internal fan operation mode of the existing self-cleaning condensation stage affects the condensation efficiency.
  • a method for controlling self-cleaning of an air conditioner comprising: obtaining an operating parameter of a condensation stage of the air conditioner when operating the self-cleaning mode; and when the operating parameter satisfies a preset fan opening condition, Controls the operation of the internal fan; when the operating parameter meets the preset fan closing condition, the control turns off the operation of the internal fan.
  • the operating parameter includes at least: a current running time accumulated by the compressor, a first current coil temperature of the inner coil, an interval between the current time and a last closing time of the inner fan;
  • the fan opening condition includes at least: When the air conditioner starts to run the self-cleaning mode, the current running time is greater than or equal to the preset running time threshold; the first current coil temperature is less than or equal to the preset first coil temperature threshold; the interval duration is greater than the preset interval duration threshold.
  • the operating parameter includes at least: a current single running time of the inner fan and a second current coil temperature of the inner coil; and the fan closing condition at least includes: the current single running time is greater than or equal to a preset single running time threshold
  • the second current coil temperature is greater than or equal to a preset second coil temperature threshold, wherein the second coil temperature threshold is greater than the first coil temperature threshold and less than the condensation critical temperature.
  • the method further includes: obtaining a current indoor temperature of the air-conditioned space; and determining a critical temperature of the frost according to the indoor temperature.
  • the method further includes: when the air conditioner satisfies the defrosting condition, controlling the air conditioner to switch into the defrosting phase of the self-cleaning mode, and controlling the inner fan to continuously operate at the set speed.
  • a self-cleaning control device for an air conditioner
  • the device comprising: an acquisition module, configured to acquire an operating parameter of a condensation stage of the air conditioner when the self-cleaning mode is operated; and a main control module, configured to When the running parameter meets the preset fan opening condition, the control turns on the operation of the inner fan; and when the running parameter satisfies the preset fan closing condition, the control turns off the operation of the inner fan.
  • the operating parameter includes at least: a current running time accumulated by the compressor, a first current coil temperature of the inner coil, an interval between the current time and a last closing time of the inner fan;
  • the fan opening condition includes at least: When the air conditioner starts to run the self-cleaning mode, the current running time is greater than or equal to the preset running time threshold; the first current coil temperature is less than or equal to the preset first coil temperature threshold; the interval duration is greater than the preset interval duration threshold.
  • the operating parameter includes at least: a current single running time of the inner fan and a second current coil temperature of the inner coil; and the fan closing condition at least includes: the current single running time is greater than or equal to a preset single running time threshold
  • the second current coil temperature is greater than or equal to a preset second coil temperature threshold, wherein the second coil temperature threshold is greater than the first coil temperature threshold and less than the condensation critical temperature.
  • the obtaining module is further configured to acquire a current indoor temperature of the air-conditioned space; the device further includes a determining module, and the determining module is configured to determine a frosting critical temperature according to the indoor temperature.
  • the device further includes a switching module, configured to: when the air conditioner meets the defrosting condition, control the air conditioner to switch into a defrosting phase of the self-cleaning mode, and control the inner fan to continuously operate at the set speed.
  • a switching module configured to: when the air conditioner meets the defrosting condition, control the air conditioner to switch into a defrosting phase of the self-cleaning mode, and control the inner fan to continuously operate at the set speed.
  • the self-cleaning control method of the present invention controls the running state of the inner fan in the frosting stage according to the preset fan opening and closing conditions, thereby ensuring that the water vapor is evenly distributed in the indoor unit by running the inner fan, or can be lowered by closing the inner fan.
  • the evaporation pressure in the indoor unit speeds up the internal temperature of the indoor unit to ensure the condensation efficiency of the air conditioner.
  • FIG. 1 is a flow chart 1 of an air conditioner self-cleaning control method according to an exemplary embodiment of the present invention
  • FIG. 2 is a schematic diagram showing changes in internal fan speed of the air conditioner self-cleaning control method according to an exemplary embodiment
  • FIG. 3 is a second flowchart of a self-cleaning control method for an air conditioner according to an exemplary embodiment of the present invention
  • FIG. 4 is a block diagram showing the structure of a self-cleaning control device as described herein, according to an exemplary embodiment.
  • relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not require or imply any actual relationship between the entities or operations or order.
  • the terms “comprises” or “comprising” or “comprising” or any other variations are intended to encompass a non-exclusive inclusion, such that a process, method, or device that includes a plurality of elements includes not only those elements but also other items not specifically listed. Elements, or elements that are inherent to such a process, method, or device. An element that is defined by the phrase “comprising a " does not exclude the presence of additional equivalent elements in the process, method, or device that comprises the element.
  • the existing air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a throttle device, and a compressor, and the indoor heat exchanger, the outdoor heat exchanger, the throttling device, and the compressor are connected by a refrigerant pipe to constitute a refrigerant cycle.
  • the circuit and the refrigerant flow through the flow path set by the refrigerant circulation circuit along different operation modes to realize functions such as heating, cooling and defrosting.
  • the operating modes of the air conditioner herein include a cooling mode, a heating mode, and a self-cleaning mode, wherein the cooling mode is generally applied to a high temperature condition in summer to reduce the indoor ambient temperature; and the heating mode is generally applied to a low temperature in winter.
  • the working condition is used to raise the indoor ambient temperature; while the self-cleaning mode is generally the user's self-selected function mode, which can automatically clean the heat exchanger in the case of more dust and dirt accumulated on the heat exchanger.
  • the indoor heat exchanger is a heat exchanger directly used to change the indoor temperature environment, the cleanness of the indoor heat exchanger can directly affect the user experience. Therefore, the main application object of the self-cleaning mode of the existing air conditioner is the indoor heat exchanger, and the self-cleaning process in the subsequent embodiment is also the self-cleaning object of the indoor heat exchanger.
  • the control method of this paper cannot be applied to the self-cleaning operation of the outdoor heat exchanger. It should be understood that if the existing air conditioner adopts the same or similar control method as described herein, the outdoor heat exchanger is self-contained. Cleaning operations should also be included in the scope of this article.
  • the refrigerant flow direction is that the high-temperature refrigerant discharged from the compressor first flows through the outdoor heat exchanger to exchange heat with the outdoor environment, and then exchanges heat with the indoor environment in the inflowing indoor heat exchanger, and finally the refrigerant flows back to
  • the compressor is recompressed; in this process, the refrigerant flowing through the outdoor heat exchanger releases heat to the outdoor environment, and the refrigerant flowing through the indoor heat exchanger absorbs heat from the indoor environment, and the refrigerant circulates through the refrigerant circulation loop.
  • the flow can continuously discharge the heat in the room to the outdoor environment, so that the cooling purpose of reducing the indoor ambient temperature can be achieved.
  • the high-temperature refrigerant discharged from the refrigerant flow in the heating mode operation to the compressor first flows through the indoor heat exchanger to exchange heat with the outdoor environment, and then exchanges heat with the indoor environment in the outdoor heat exchanger, and finally the refrigerant returns.
  • the compressor is recompressed; in this process, the refrigerant flowing through the indoor heat exchanger releases heat to the indoor environment, and the refrigerant flowing through the outdoor heat exchanger absorbs heat from the outdoor environment, and the refrigerant passes through the refrigerant circulation loop.
  • the circulating flow can continuously release the outdoor heat to the indoor environment, so that the heating effect of improving the indoor ambient temperature can be achieved.
  • the workflow of the air conditioner running in the self-cleaning mode mainly includes the two stages of the frosting stage and the defrost stage, wherein the frosting mode is operated in the frosting stage to coagulate the indoor heat exchanger of the indoor unit. Ice frosting; the defrosting mode is run during the defrosting phase to melt the frost that the indoor heat exchanger condenses during the first frosting stage.
  • the control method in this paper is In the case where the air conditioner is in the direction of the refrigerant defined by the cooling mode, the frosting operation of the indoor heat exchanger is realized by adjusting the operating parameters of the components such as the compressor, the internal fan, and the throttle device.
  • the defrosting operation of the indoor heat exchanger is realized by adjusting the operating parameters of the compressor, the internal fan, the throttling device and the like in the case where the refrigerant flows in the heating mode.
  • FIG. 1 is a flow chart 1 of an air conditioner self-cleaning control method according to an exemplary embodiment.
  • the present invention provides a self-cleaning control method for an air conditioner, which can be used for controlling the cleaning process of the heat exchanger of the air conditioner.
  • the control method includes:
  • the control method in this paper mainly controls the opening or closing of the internal fan according to the operating parameters of the frosting stage.
  • the relevant operating parameters for determining the opening of the fan include at least the following: the current running time of the compressor, and the inner coil The interval between the first current coil temperature and the current time and the last closing time of the internal fan.
  • the compressor for the current running time of the compressor, in general, the compressor is continuously running in the frosting stage and the defrosting stage, and only during the process of switching the cooling flow direction of the condensation stage to the heating flow direction of the defrosting stage. Interrupted for a certain period of time, because the control method of this paper is mainly for the internal fan opening and closing control during the frosting stage, therefore, the compressor is continuously running during the frosting stage, and the current running time of the compressor is the air conditioner switched from the previous mode. The length of time from the start of the self-cleaning mode operation to the initial time of the current control flow.
  • the air conditioner of this paper will judge whether the fan opening condition or the closing condition is satisfied multiple times, so that the condition judgment can be performed again according to the real-time working condition, so that the air conditioner is inside.
  • the fan operation is adapted to the current operating conditions. In this way, the flow of the control method in this paper is executed multiple times during the frosting phase. Therefore, the foregoing control flow is the flow corresponding to the control method executed by the current number of times.
  • the operation time of the compressor directly determines the amount of the refrigerant to be delivered to the indoor heat exchanger, and the operation of the compressor The longer the duration, the more refrigerant is delivered. Conversely, the less the refrigerant is. In this way, it can be judged whether the sufficient amount of refrigerant has been delivered to the indoor heat exchanger during the frosting stage according to the current running time of the compressor. In the case where the heat exchanger already has enough refrigerant for the frosting, the fan will not open until the evaporation pressure is too high, so as to avoid the duration of the frosting phase being too long.
  • a temperature sensor is disposed on the inner coil of the indoor unit, which can be used to detect the real-time temperature of the inner coil in the current control flow, which is the current control process.
  • First current coil temperature is a temperature sensor disposed on the inner coil of the indoor unit, which can be used to detect the real-time temperature of the inner coil in the current control flow, which is the current control process.
  • the self-cleaning process requires condensation of water vapor in the air flowing through the indoor unit on the inner coil and the fins of the heat exchanger
  • the real-time temperature of the inner coil in direct contact with the air It can directly affect whether the water vapor is condensed. Only when the real-time temperature of the inner coil is below the critical temperature of the frost, the water vapor will gradually condense into frost in the indoor unit, and the actual temperature of the inner coil is higher than At the critical temperature of the condensation, the water vapor will not condense and the original condensed frost will gradually melt and vaporize.
  • the indoor unit reaches the temperature condition of condensation in the frosting stage, and when the temperature condition of the condensation is reached, the evaporation pressure is not caused when the fan is turned on. Too high to avoid the duration of the frosting phase is too long.
  • the relevant operating parameters that determine the opening of the fan include at least the following: the current single running time of the inner fan and the second current coil temperature of the inner coil.
  • the fan needs to meet the conditions that the continuous operation time should not be too short.
  • the inner fan For the second current coil temperature of the inner coil, when the inner fan is turned on, since the indoor temperature is generally higher than the internal temperature of the indoor unit during the frosting stage, the inner fan introduces some of the indoor hot air into the indoor unit. Internally, the temperature inside the indoor unit rises. When the actual temperature of the inner coil is higher than the critical temperature of the condensation, the water vapor will not condense and the original condensed frost will gradually melt and vaporize, which will affect the frosting. The condensation efficiency of the stage, therefore, it can be judged according to the second current coil temperature of the inner coil whether the operation of the inner fan needs to be turned off to avoid the temperature inside the indoor unit being too high.
  • the second current coil temperature can also be detected by using a temperature sensor disposed in the indoor unit in the foregoing embodiment.
  • the detected coil temperature is defined as a first current coil temperature and a second current coil temperature.
  • the fan opening condition at least includes: when the air conditioner starts to run the self-cleaning mode, the current running time of the compressor is greater than or equal to a preset running time threshold; the first current coil temperature is less than or equal to the preset The first coil temperature threshold; the interval duration is greater than a preset interval duration threshold.
  • the operating time threshold corresponds to the minimum amount of refrigerant used by the compressor to deliver the frost to the indoor heat exchanger. Therefore, when the current running time of the compressor is greater than or equal to the operating time threshold, The amount of refrigerant flowing through the indoor heat exchanger can satisfy the amount of refrigerant in the self-cleaning condensation stage of the air conditioner.
  • the running time of the compressor is increased in time, when a certain control process satisfies the requirement of the running time, the running time of the subsequent other times of the control flow also satisfies the requirement of the running time.
  • the preset first coil temperature threshold is generally lower than the condensation critical temperature, thereby ensuring the frosting efficiency in the frosting stage.
  • the fan closing condition includes: the current single running time is greater than or equal to a preset single running time threshold; and the second current coil temperature is greater than or equal to a preset second coil temperature threshold, wherein The second coil temperature threshold is greater than the first coil temperature threshold and less than the condensation critical temperature.
  • the control flow of the present invention is executed multiple times in the frosting stage.
  • the internal fan In the case where the internal fan is in the open state in the previous control flow, if the fan opening condition is still satisfied in the current control flow, the internal fan is maintained. Operation, if the fan closing condition is met, the control closes the operation of the inner fan; and in the case that the inner fan is in the off state in the previous control process, if the fan opening condition is satisfied in the current control process, the control is turned on to operate the inner fan If the fan closing condition is still met, the internal fan is kept off.
  • FIG. 2 is a schematic diagram showing the change of the internal fan speed in an embodiment.
  • the actual change of the internal fan speed in the condensation stage of the control method of this paper approximates the form of the pulse signal, and correspondingly, the temperature of the inner coil. It is followed by a trend of approximating the wave; during the above-mentioned change of the internal fan speed, the components such as the coil are faster than the existing method, shortening the running time of the frosting stage, improving the frosting efficiency, and effectively reducing The amount of electricity consumed by the air conditioner to run the self-cleaning function.
  • the air conditioner prestores one or more sets of threshold parameter combinations in the foregoing embodiments, wherein, for the first coil temperature threshold and the second coil temperature threshold, since neither is greater than the frost critical parameter, Before the air conditioner performs the foregoing control flow, it is required to obtain the current indoor temperature of the air-conditioned space, and determine the critical temperature of the condensation according to the indoor temperature; thus, the selected temperature can be selected according to the critical temperature of the condensation determined by the current indoor temperature condition. Threshold parameter.
  • the air conditioner when the air conditioner satisfies the defrosting condition, the air conditioner is controlled to switch into the defrosting phase of the self-cleaning mode, and the inner fan is controlled to continue to operate at the set speed.
  • FIG. 3 is a second flowchart of a self-cleaning control method according to an exemplary embodiment.
  • the specific process of the control method is as follows:
  • the user selects a preset self-cleaning option through the remote controller or the control panel, and determines; the remote controller or the control panel sends a self-cleaning command to the main controller of the air conditioner, and the main controller of the air conditioner receives the self-cleaning command. After the cleaning command, the air conditioner can be controlled to enter the self-cleaning mode;
  • the air conditioner can preset the self-determination program that the air conditioner needs to go into self-cleaning, so that the air conditioner can also determine whether to run the self-cleaning mode by its own intelligent judgment;
  • the air conditioner enters a self-cleaning mode
  • the air temperature entering the indoor unit is close to the indoor ambient temperature, so the inner fan is generally controlled to be closed to reduce the flow of the higher temperature air inside the indoor unit. So that the internal temperature of the indoor unit is lowered to the critical temperature of the condensation as soon as possible;
  • the air conditioner operates in a self-cleaning mode of the frosting mode
  • the refrigerant flows in the same manner as the refrigerant in the cooling mode, and at the same time, the temperature inside the indoor unit is lowered by closing the indoor air outlet and increasing the operating frequency of the compressor. a low temperature environment in which the inside of the indoor unit forms condensation of water into frost;
  • the acquired operating parameters include, but are not limited to, the current running time of the compressor, the first current coil temperature of the inner coil, and the interval between the current time and the last closing time of the inner fan;
  • step S305 it is determined whether the fan open condition is met, if yes, step S306 is performed, if no, step S309 is performed;
  • step S307 it is determined whether the fan shutdown condition is met, if yes, step S308 is performed, and if not, step S09 is performed;
  • step S310 determining whether the air conditioner meets the preset defrosting condition, if yes, proceeding to step S311, and if not, proceeding to step S303;
  • FIG. 4 is a block diagram showing the structure of the self-cleaning control device herein, according to an exemplary embodiment.
  • the present invention provides a self-cleaning control device for an air conditioner, which can be used to control an air conditioner to perform the self-cleaning control process shown in the foregoing embodiments.
  • the device includes:
  • the obtaining module 410 is configured to acquire an operating parameter of the air-conditioning stage of the air conditioner when the self-cleaning mode is running;
  • the main control module 420 is configured to control the operation of the internal fan when the operating parameter satisfies the preset fan opening condition; and control the operation of the internal fan to be turned off when the operating parameter satisfies the preset fan closing condition.
  • the operating parameter includes at least: a current running time accumulated by the compressor, a first current coil temperature of the inner coil, an interval between the current time and a last closing time of the internal fan; and the fan opening condition is at least
  • the method includes: when the air conditioner starts to run the self-cleaning mode, the current running time is greater than or equal to a preset running time threshold; the first current coil temperature is less than or equal to a preset first coil temperature threshold; the interval duration is greater than a preset interval. Duration threshold.
  • the operating parameter includes at least: a current single running time of the inner fan and a second current coil temperature of the inner coil; and the fan closing condition includes at least: the current single running time is greater than or equal to the preset single time
  • the operating time threshold is; the second current coil temperature is greater than or equal to a preset second coil temperature threshold, wherein the second coil temperature threshold is greater than the first coil temperature threshold and less than the frost critical temperature.
  • the obtaining module 410 is further configured to acquire a current indoor temperature of the air-conditioned space; the device further includes a determining module 430, and the determining module 430 is configured to determine a frosting critical temperature according to the indoor temperature.
  • the device further includes a switching module 440, configured to: when the air conditioner meets the defrosting condition, control the air conditioner to switch into the defrosting phase of the self-cleaning mode, and control the inner fan to continuously run at the set speed .
  • a switching module 440 configured to: when the air conditioner meets the defrosting condition, control the air conditioner to switch into the defrosting phase of the self-cleaning mode, and control the inner fan to continuously run at the set speed .

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

Abstract

La présente invention se rapporte au domaine des techniques d'auto-nettoyage de climatiseur. L'invention concerne un procédé et un dispositif destinés à l'auto-nettoyage d'un climatiseur. Le procédé comprend les étapes consistant à : acquérir un paramètre de fonctionnement d'un climatiseur dans une étape de givrage dans un mode d'auto-nettoyage (S304); si le paramètre de fonctionnement satisfait une condition d'activation de soufflante d'air prédéfinie, commander le démarrage du fonctionnement d'une soufflante d'air interne (S305, S306); et si le paramètre de fonctionnement satisfait une condition de désactivation de soufflante d'air prédéfinie, commander une fin de fonctionnement de la soufflante d'air interne (S307, S308). Le procédé de commande d'auto-nettoyage d'un climatiseur commande les états de fonctionnement d'une soufflante d'air interne dans une étape de givrage selon des conditions prédéfinies d'activation et de désactivation de soufflante d'air, de telle sorte que la soufflante d'air interne puisse être activée pour assurer une distribution uniforme de vapeur dans une unité intérieure, ou la soufflante d'air interne puisse être désactivée pour abaisser une pression d'évaporation dans l'unité intérieure de façon à faciliter l'abaissement d'une température dans l'unité intérieure, améliorant ainsi l'efficacité de givrage d'un climatiseur.
PCT/CN2018/096148 2017-07-31 2018-07-18 Procédé de contrôle et dispositif d'auto-nettoyage de climatiseur WO2019024681A1 (fr)

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CN110887159A (zh) * 2018-09-10 2020-03-17 青岛海尔空调器有限总公司 基于湿度检测的空调自清洁控制方法
CN110887156A (zh) * 2018-09-10 2020-03-17 青岛海尔空调器有限总公司 一种基于湿度检测的空调自清洁控制方法
CN110966724B (zh) * 2018-09-30 2021-07-20 郑州海尔空调器有限公司 用于空调系统的控制方法及装置、空调系统、计算机设备、存储介质
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