WO2020248414A1 - Climatiseur multi-bloc et procédé de commande d'auto-nettoyage dudit climatiseur - Google Patents

Climatiseur multi-bloc et procédé de commande d'auto-nettoyage dudit climatiseur Download PDF

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Publication number
WO2020248414A1
WO2020248414A1 PCT/CN2019/105645 CN2019105645W WO2020248414A1 WO 2020248414 A1 WO2020248414 A1 WO 2020248414A1 CN 2019105645 W CN2019105645 W CN 2019105645W WO 2020248414 A1 WO2020248414 A1 WO 2020248414A1
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Prior art keywords
indoor unit
control method
self
air conditioner
indoor
Prior art date
Application number
PCT/CN2019/105645
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English (en)
Chinese (zh)
Inventor
王德平
杨文钧
王万丽
朱豪
徐菲菲
罗祖春
Original Assignee
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 WO2020248414A1 publication Critical patent/WO2020248414A1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0003—Exclusively-fluid systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • 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 conditioning, in particular to a one-to-multiple air conditioner and a self-cleaning control method thereof.
  • the air conditioner During the working process of the air conditioner, the air exchanges heat with the indoor unit heat exchanger. Because the air contains dust, the dust in the air will also adhere to the heat exchanger. With the long-term use of the air conditioner, dust will be deposited on the indoor unit. Severe dust accumulation on the heat exchanger will affect the heat exchange effect of the heat exchanger, and will also breed a large number of bacteria, especially when the indoor air flows through the indoor unit, the air will carry dust and bacteria to the indoor space, thereby giving users Health threatens. In view of this, the air conditioner needs to be cleaned in time, and the air conditioner in the prior art often cleans the indoor unit by running a self-cleaning mode for the purpose of descaling and cleaning.
  • One-to-multiple air conditioners are widely used.
  • One-to-multiple air conditioners are connected to multiple indoor units through one outdoor unit, and multiple indoor units are located in different indoor environments, thereby saving the space of the outdoor unit and meeting the air conditioning needs of multiple rooms at the same time.
  • the self-cleaning effect of multiple indoor units is likely to be poor, and the indoor unit cannot be completely cleaned.
  • the art needs a new self-cleaning control solution for one-to-multiple air conditioners to solve the above-mentioned problems.
  • the existing one-to-multiple air conditioner has poor self-cleaning effect when multiple indoor units enter self-cleaning at the same time due to the limited amount of refrigerant.
  • the present invention Provided is a self-cleaning control method of a one-to-multiple air conditioner, the one-to-multiple air conditioner includes an outdoor unit and an indoor unit, the indoor unit includes a first indoor unit and at least one second indoor unit, the control method include:
  • the first indoor unit is executed in a self-cleaning mode; the electronic expansion valve corresponding to the second indoor unit is closed.
  • control method includes: cutting off the communication between the second indoor unit and the outdoor unit when the electronic expansion valve corresponding to the second indoor unit is closed.
  • control method includes: in the case that the electronic expansion valve corresponding to the second indoor unit is closed, making the fan of the second indoor unit correspond to the second indoor unit The electronic expansion valve operates at the speed before closing.
  • the self-cleaning mode includes a frosting phase and a defrosting phase, wherein, in the frosting phase, the fan of the first indoor unit is kept turned off, and the first indoor unit The temperature of the coil of the machine is not lower than the temperature threshold; in the defrosting phase, the fan of the first indoor machine is operated at a set speed.
  • the temperature threshold ranges from -12°C to -14°C
  • the set speed ranges from 400r/min to 500r/min.
  • the compressor of the outdoor unit in the defrosting phase, the compressor of the outdoor unit is turned off; and the opening degree of the electronic expansion valve of the first indoor unit is adjusted to the maximum opening degree.
  • the first indoor unit after the first indoor unit enters the frosting phase, in the case that the coil temperature of the first indoor unit continues to be less than or equal to the set temperature for a set time, The first indoor unit enters the defrosting stage.
  • the number of the set temperature is multiple, and each set temperature corresponds to a set time, and the coil temperature of the first indoor unit is continuously less than or equal to any set When the time for the fixed temperature reaches its corresponding set time, the first indoor unit enters the defrosting phase.
  • the time threshold ranges from 10 to 11 minutes.
  • the self-cleaning control method of the one-to-multiple air conditioner of the present invention makes the first indoor unit that receives the self-cleaning signal enter the self-cleaning mode, and makes all the indoor units of the air conditioner except the first indoor unit
  • the opening degree of the electronic expansion valve corresponding to the second indoor unit is zero to ensure that there is sufficient refrigerant to circulate in the piping system of the first indoor unit. In this way, the frosting of the first indoor unit will be fuller.
  • the dust and dirt on the first indoor unit can be peeled and washed to a higher degree, so that a better self-cleaning effect can be achieved.
  • the outdoor unit when the electronic expansion valve corresponding to the second indoor unit is closed, the communication between the second indoor unit and the outdoor unit is interrupted.
  • the outdoor unit will always operate in the self-cleaning mode, and it will not be affected by the user instructions received by the second indoor unit, thereby further ensuring the self-cleaning effect of the first indoor unit.
  • make the fan of the second indoor unit run at the corresponding set wind speed. In this way, even if there is no refrigerant flowing through the second indoor unit, the second indoor unit can ensure users in its corresponding indoor space by blowing air. Comfort.
  • the present invention also provides a one-to-multiple air conditioner.
  • the one-to-multiple air conditioner includes a controller for executing the self-cleaning control method of the aforementioned one-to-multiple air conditioner.
  • the one-to-multiple air conditioner of the present invention has all the technical effects of the aforementioned self-cleaning control method, which will not be repeated here.
  • FIG. 1 is a schematic flowchart of a self-cleaning control method for a multi-air conditioner according to an embodiment of the present invention.
  • the terms “installed”, “connected”, and “connected” should be understood in a broad sense, for example, it may be a fixed connection or It is a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • installed e.g., it may be a fixed connection or It is a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • the one-to-multiple air conditioner of the present invention includes an outdoor unit and multiple indoor units, wherein the outdoor unit is connected to the multiple indoor units and the multiple indoor units are located in different indoor spaces. After the indoor unit runs for a period of time, a lot of dust and dirt will be deposited on the heat exchanger of the indoor unit, which not only affects the heat exchange effect of the heat exchanger, but also easily breeds bacteria, which affects the health of users.
  • the existing one-to-multiple air conditioners usually use the indoor unit to enter the self-cleaning mode to realize the self-cleaning of the indoor unit. Specifically, the indoor unit is frosted first, then defrosted, and the condensed water generated during defrosting is used to take away for replacement. Dust on the surface of the heater.
  • the limited refrigerant may cause insufficient frosting of the heat exchangers of multiple indoor units , Thereby greatly reducing the self-cleaning effect.
  • FIG. 1 is a schematic flowchart of a self-cleaning control method for a one-to-multiple air conditioner according to an embodiment of the present invention.
  • the control method of the present invention mainly includes:
  • Step S10 When the one-to-multiple air conditioner is in a cooling mode, the first indoor unit is executed in a self-cleaning mode.
  • the first indoor unit is the indoor unit that first receives the self-cleaning signal among all indoor units of the air conditioner.
  • Step S20 Close the electronic expansion valve corresponding to the second indoor unit.
  • the second indoor unit does not point to a specific indoor unit, but refers to all indoor units of the air conditioner other than the first indoor unit.
  • the number of second indoor units can be One or more, which needs to be determined according to the number of indoor units of one-to-multiple air conditioners, that is, when the number of indoor units of one-to-multiple air conditioners is N, excluding one first indoor unit, the second The number of indoor units is N-1.
  • the electronic expansion valves corresponding to these N-1 indoor units need to be closed.
  • a one-to-three air conditioner includes an outdoor unit, an indoor unit A, an indoor unit B, and an indoor unit C. Among the three indoor units, the indoor unit A receives the self-cleaning signal first.
  • Unit A is the first indoor unit, which executes the self-cleaning mode first.
  • Indoor unit B and indoor unit C are second indoor units.
  • the corresponding electronic expansion valves of indoor unit B and indoor unit C are closed, even if the opening degree of the electronic expansion valve reaches Zero, at this time the refrigerant can only enter the indoor unit A, but cannot enter the indoor units B and C.
  • steps S10 to S20 are in accordance with the first indoor unit to enter the self-cleaning mode, and then the second indoor unit to close the electronic expansion valve, in actual applications, the two steps can be converted Sequentially or simultaneously.
  • the control method of the present invention makes the first indoor unit that first receives the self-cleaning signal enter the self-cleaning mode, and makes the remaining indoor units in the air conditioner except the first indoor unit, that is, the second indoor unit corresponding to
  • the opening degree of the electronic expansion valve of the first indoor unit is zero, so as to ensure that there is sufficient refrigerant to circulate in the pipeline system of the first indoor unit, so that the heat exchanger of the first indoor unit is fuller, and the dust on the first indoor unit
  • the degree of peeling and scouring is higher, which in turn achieves a better self-cleaning effect.
  • the control method of the present invention adopts a self-cleaning method for a single indoor unit, that is, when one or more indoor units of the air conditioner receive a self-cleaning instruction, it is determined that the air conditioner is currently executing the self-cleaning mode Then only the first indoor unit of the air conditioner will execute the self-cleaning mode, and the electronic expansion valve of other indoor units (ie the second indoor unit) will be closed, so as to ensure that the first indoor unit that is currently executing the self-cleaning mode The self-cleaning effect. Therefore, in practical applications, the first indoor unit can be understood as the indoor unit currently executing the self-cleaning mode, and it can be the indoor unit that first receives the self-cleaning signal among all indoor units, which may be determined in other ways.
  • a one-to-three air conditioner includes an outdoor unit, an indoor unit A, an indoor unit B, and an indoor unit C.
  • the indoor unit A, the indoor unit B, and the indoor unit C execute the self-cleaning mode in a specific order.
  • indoor unit A executes the self-cleaning mode
  • indoor unit A is the first indoor unit
  • indoor units B and C are the second indoor units
  • indoor unit A ends the self-cleaning mode it is the turn of indoor unit B to execute the self-cleaning mode in order.
  • indoor unit B is the first indoor unit
  • indoor units A and C are second indoor units.
  • control method of the present invention includes:
  • the communication interruption between the second indoor unit and the outdoor unit means that the indoor unit and outdoor unit of the air conditioning system cannot perform normal data transmission, the outdoor unit cannot collect indoor signals, and the indoor unit cannot collect outdoor signals.
  • the outdoor unit will not be affected by the operating parameters of the second indoor unit or the user instructions received by the second indoor unit.
  • the outdoor unit will always operate in the self-cleaning mode. Thus, the self-cleaning effect of the first indoor unit is further ensured.
  • control method of the present invention further includes:
  • the fan of the second indoor unit is operated at the speed before the electronic expansion valve corresponding to the second indoor unit is closed.
  • the one-to-three air conditioner includes indoor unit A, indoor unit B, and indoor unit C.
  • Indoor unit B and indoor unit C are the second indoor units.
  • the setting of the rotation speed of the fan of the second indoor unit is not limited to the above-mentioned situation, and those skilled in the art can check the second indoor unit according to actual needs.
  • the rotation speed of the second indoor unit is flexibly set when the electronic expansion valve corresponding to the indoor unit is closed.
  • the rotation speed of the indoor unit B and the indoor unit C can be not greater than 500r/min, so that the indoor unit B Faint wind blows with indoor unit C.
  • control method of the present invention makes the fan of the second indoor unit run at the speed before the electronic expansion valve corresponding to the second indoor unit is closed. In this way, even if no refrigerant flows through the second indoor unit, the second indoor unit The machine can ensure the comfort of users in the corresponding indoor space by means of air supply. In addition, the fan speed of the second indoor unit is kept stable before and after the electronic expansion valve is closed, which can also ensure the comfort of users.
  • the self-cleaning mode includes a frosting phase and a defrosting phase.
  • the frosting phase the fan of the first indoor unit is kept turned off and the coil temperature of the first indoor unit is not low. At the temperature threshold.
  • the temperature threshold ranges from -12°C to -14°C.
  • the control method of the present invention controls the compressor frequency and the expansion valve opening so that the coil temperature of the first indoor unit is not lower than the temperature threshold, so that the coil temperature of the first indoor unit is always at a lower temperature. , So as to ensure that the heat exchanger of the first indoor unit can be saturated with frost, thereby improving the self-cleaning effect. It is understandable that the range of the temperature threshold is not limited to -12°C to -14°C, and it can also be other values, and those skilled in the art can set the temperature threshold according to application scenarios.
  • the fan of the first indoor unit is operated at a set speed.
  • the control method of the present invention turns on the fan of the first indoor unit after the indoor unit heat exchanger is saturated with frost. At this time, indoor ambient hot air enters the first indoor unit for heat exchange with the heat exchanger, thereby melting Frost on the heat exchanger to achieve the purpose of defrosting.
  • the value range of the set speed of the fan of the first indoor unit is set to 400r/min to 500r/min.
  • the first indoor unit exchanges heat with the indoor space in a weak air supply mode. In this way, the defrosting effect can be ensured, and the condensed water can be effectively prevented from being blown into the indoor space by the wind.
  • the fan speed may also be other speeds, such as lower than 400r/min, and those skilled in the art can set it reasonably according to the actual situation.
  • the compressor of the outdoor unit is turned off, and the opening degree of the electronic expansion valve of the first indoor unit is adjusted to the maximum opening degree.
  • the first indoor unit after the first indoor unit enters the frosting phase, the first indoor unit enters the defrosting phase when the operating parameters of the first indoor unit meet the set conditions.
  • the above setting conditions can be regarded as the judgment conditions for the frosting and saturation of the heat exchanger of the first indoor unit.
  • the above setting conditions that is, when the heat exchanger of the first indoor unit is frosted and saturated, by turning on the first indoor unit A fan of an indoor unit.
  • the heat exchanger of the first indoor unit exchanges heat with the indoor ambient air, and the heat exchanger starts to defrost, and the defrosting water stream takes away the dust on the evaporator, thereby achieving a self-cleaning effect.
  • the setting conditions include:
  • the coil temperature of the first indoor unit is continuously lower than or equal to the set temperature within the set time.
  • the first indoor unit When the operating parameters of the first indoor unit satisfy any one of the above conditions 1) to 2), the first indoor unit is stopped from forming frost and the fan of the first indoor unit is turned on.
  • condition 1 those skilled in the art can set the set temperature and set time according to actual scenarios. In practical applications, only a single set temperature and set time are set, which may cause insufficient accuracy of frost determination.
  • the set temperature is -12°C and the set time is 10 minutes. When the coil temperature reaches -12°C, the coil temperature may quickly drop to -17°C or even lower. At this time, if the heat exchanger of the first indoor unit is still frosted at -17°C or lower For 10 minutes, it may cause excessive frost on the heat exchanger, which will burden the subsequent defrosting steps, so that the frost on the heat exchanger cannot be completely melted during the operation time of the self-cleaning mode.
  • the set temperature includes a plurality of set temperatures, and each set temperature corresponds to a set time.
  • the coil temperature of the first indoor unit continues to be less than or equal to the arbitrary set temperature for the corresponding set time, the first indoor unit enters the defrosting stage.
  • the aforementioned preset condition 1) includes three conditions:
  • the coil temperature of the first indoor unit is continuously less than or equal to -12°C within 10 minutes.
  • the coil temperature of the first indoor unit is continuously less than or equal to -14°C within 7 minutes.
  • the coil temperature of the first indoor unit is continuously lower than or equal to -17°C within 4 minutes.
  • condition 1) is satisfied.
  • start time to determine the indoor coil temperature is lower than the first accumulation time of the first set temperature -14 °C T b.
  • T a is less than 10 minutes
  • T b is less than 7 minutes and the coil temperature of the first indoor unit drops to -17°C
  • start timing to determine that the coil temperature of the first indoor unit is lower than the first set temperature -17°C The accumulated time T c .
  • the first indoor unit is stopped from forming frost. It can be seen that the lower the temperature of the coil, the shorter the time it takes to reach the set temperature.
  • the control method of the present invention has multiple set temperatures and set times to improve the replacement of the first indoor unit. The degree of frosting of the heat exchanger is determined so as to avoid excessive frosting of the heat exchanger of the first indoor unit.
  • the setting of the time threshold in condition 2) is to set a maximum operating time for the frosting of the air conditioner. If the coil temperature of the air conditioner has not reached the set temperature in condition 1), the air conditioner can determine the timing to stop frosting according to condition 2).
  • the value range of the time threshold is set to 10 to 11 minutes.
  • condition 2) the frosting operation time of the first indoor unit is not greater than the time threshold, so as to avoid the coil being in a low temperature state for a long time and causing excessive frosting of the coil, which will burden the subsequent defrosting steps , So that the frost on the heat exchanger cannot be completely melted during the operation time of the self-cleaning mode.
  • the value of the time threshold is not limited to the above examples, and those skilled in the art can make certain adjustments to the time threshold according to specific application scenarios.
  • control method of the present invention accurately judges the degree of frosting of the coil by setting the above preset conditions, so as to ensure the self-cleaning effect of the heat exchanger of the first indoor unit, while also avoiding replacement There is too much frost on the heater and the subsequent defrosting step cannot completely melt.
  • the setting of the setting conditions is not limited to the above examples.
  • the above conditions 11), 12), 13) and 2) can be combined arbitrarily or only one of them can be selected as the judgment condition for determining the frost and saturation of the heat exchanger.
  • the determining factors in the setting conditions are not limited to the coil temperature, but can also be other working parameters of the first indoor unit. Those skilled in the art can reasonably set the setting conditions according to actual application scenarios.
  • the self-cleaning control method of the present invention makes the first indoor unit that first receives the self-cleaning instruction enter the self-cleaning mode, so that the electronic expansion valve corresponding to the second indoor unit is closed, so that the second indoor unit and The communication of the outdoor unit is interrupted and the fan of the second indoor unit runs at the corresponding set wind speed.
  • the electronic expansion valve corresponding to the second indoor unit is closed to ensure that there is sufficient refrigerant to circulate in the pipeline system of the first indoor unit.
  • the heat exchanger of the first indoor unit will be more full of frost, and the degree of peeling and washing of the dust on the first indoor unit will be higher, so that a better self-cleaning effect can be achieved.
  • the outdoor unit will not be affected by the user instructions received by the second indoor unit, but will always operate in the self-cleaning mode.
  • the fan of the second indoor unit operates at the corresponding set wind speed to ensure the comfort of the user in the indoor space where the second indoor unit is located.
  • the degree of frosting of the heat exchanger of the first indoor unit is determined by setting the setting conditions, so as to ensure the self-cleaning effect of the heat exchanger of the first indoor unit. At the same time, it can also avoid excessive frost on the heat exchanger of the first indoor unit, which may cause the subsequent defrosting step to fail to melt completely.

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Abstract

L'invention concerne un climatiseur multi-bloc et un procédé de commande de l'auto-nettoyage dudit climatiseur. Le climatiseur multi-bloc comprend une unité extérieure et un groupe d'unités intérieures, et le groupe d'unités intérieures comprend une première unité intérieure et au moins une seconde unité intérieure. Le procédé de commande de l'auto-nettoyage du climatiseur multi-bloc consiste : à amener la première unité intérieure à exécuter un mode d'auto-nettoyage lorsque toutes les unités intérieures du climatiseur sont en état de fonctionnement de refroidissement ; et à fermer un détendeur électronique correspondant à la seconde unité intérieure. Dans le procédé de commande décrit, le détendeur électronique de la seconde unité intérieure est fermé afin d'assurer que la quantité de fluide frigorigène en circulation dans un réseau de conduites de la première unité intérieure soit suffisante, de sorte que le givrage de la première unité intérieure soit plus complet, qu'un effet de décollement et de lavage de poussière et de saletés soit meilleur, et qu'un effet d'auto-nettoyage soit amélioré.
PCT/CN2019/105645 2019-06-10 2019-09-12 Climatiseur multi-bloc et procédé de commande d'auto-nettoyage dudit climatiseur WO2020248414A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910497806.9A CN110230857B (zh) 2019-06-10 2019-06-10 一拖多空调器及其自清洁控制方法
CN201910497806.9 2019-06-10

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WO2020248414A1 true WO2020248414A1 (fr) 2020-12-17

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WO (1) WO2020248414A1 (fr)

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