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WO2015043097A1 - Système de climatiseur et son procédé de commande de dégivrage - Google Patents

Système de climatiseur et son procédé de commande de dégivrage Download PDF

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Publication number
WO2015043097A1
WO2015043097A1 PCT/CN2013/090591 CN2013090591W WO2015043097A1 WO 2015043097 A1 WO2015043097 A1 WO 2015043097A1 CN 2013090591 W CN2013090591 W CN 2013090591W WO 2015043097 A1 WO2015043097 A1 WO 2015043097A1
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WO
WIPO (PCT)
Prior art keywords
temperature
defrosting
bypass
air conditioner
heat exchanger
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.)
Ceased
Application number
PCT/CN2013/090591
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English (en)
Chinese (zh)
Inventor
徐龙贵
程志明
吕艳红
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.)
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Guangdong Midea Refrigeration Equipment 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 Guangdong Midea Refrigeration Equipment Co Ltd filed Critical Guangdong Midea Refrigeration Equipment Co Ltd
Publication of WO2015043097A1 publication Critical patent/WO2015043097A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • F24F11/62—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
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/031—Sensor arrangements
    • F25B2313/0315—Temperature sensors near the outdoor heat exchanger
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
    • 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
    • F25B2500/31—Low ambient temperatures
    • 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
    • F25B2600/01—Timing
    • 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
    • F25B2600/25—Control of valves
    • F25B2600/2501—Bypass valves
    • 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
    • F25B2600/25—Control of valves
    • F25B2600/2507—Flow-diverting valves

Definitions

  • the present invention relates to the field of air conditioner technology, and in particular, to an air conditioner system and a defrosting control method thereof.
  • the indoor side temperature is high and the outdoor side temperature is low. Due to the temperature drop of the outdoor side heat exchanger, condensation water will appear on the fins; and when the temperature of the outdoor side heat exchanger drops to a certain extent, the fins will begin to frost and may even freeze, which will cause heat exchange. The passage is blocked, so that the heating effect is poor or even no heat.
  • the microchannel parallel flow heat exchanger is used as the outdoor heat exchanger, the frosting speed during operation is faster, the defrosting time is longer, and the capillary is not changed or the opening of the electronic expansion valve is not large enough due to defrosting.
  • the temperature of the refrigerant in the flat tube at the bottom is lower than the temperature of the refrigerant in the flat tube at other positions, so that the frost condensed in the flat tube at the bottom of the microchannel parallel flow heat exchanger is difficult to remove. Thereby affecting the heating effect.
  • a primary object of the present invention is to provide an air conditioner system and a defrosting control method thereof, which aim to improve the defrosting efficiency of an air conditioner system.
  • the invention provides a defrosting control method for an air conditioner system, and the control method comprises the following steps:
  • the bypass circuit When the temperature Tx is less than the first temperature threshold T1, or when Tx-Ty is greater than the second temperature threshold T6, the bypass circuit is turned on, the air conditioner is bypassed, and the bypass is turned off when the bypass defrost exit condition is satisfied. Pass circuit
  • the four-way valve is controlled to be reversed, and the four-way valve tangential defrosting is performed on the air conditioner.
  • the disconnecting the bypass circuit when the bypass defrosting exit condition is satisfied comprises:
  • the obtaining temperature Ty on the inlet pipe of the outdoor microchannel parallel flow heat exchanger comprises: obtaining the temperature Ty on the inlet pipe of the outdoor microchannel parallel flow heat exchanger at intervals;
  • exiting the bypass defrosting includes exiting the bypass defrosting when the temperature Ty is greater than or equal to the third temperature threshold T3 for b consecutive times.
  • the method further comprises:
  • the temperature Tx on the outlet pipe of the outdoor microchannel parallel flow heat exchanger is started, and the temperature Ty on the inlet pipe includes: the air conditioning operation heating mode When the first preset time is taken, the temperature Tx on the outlet pipe of the outdoor microchannel parallel flow heat exchanger is obtained at intervals; and the temperature Ty on the inlet pipe of the outdoor microchannel parallel flow heat exchanger is obtained at intervals;
  • the conduction bypass circuit includes: when the temperature Tx is continuously less than the first temperature threshold T1, the conduction bypass circuit, wherein a is a natural number;
  • the minimum temperature Tz of the outdoor microchannel parallel flow heat exchanger when the defrosting is obtained includes: obtaining the lowest temperature Tz of the outdoor microchannel parallel flow heat exchanger at intervals;
  • the four-way valve is controlled to be reversed, and the four-way valve tangential defrosting of the air conditioner includes: when the temperature Tz is less than the second temperature threshold T2 for m times consecutively, the control four The valve is reversing, and the four-way valve tangential defrost is performed on the air conditioner, where m is a natural number.
  • control four-way valve is reversed, and the four-way valve tangential defrosting of the air conditioner further includes:
  • the temperature Tx on the outlet pipe of the outdoor microchannel parallel flow heat exchanger is continuously obtained.
  • the invention also provides a defrosting control method for an air conditioner system, comprising the following steps:
  • the four-way valve is controlled to be reversed, and the bypass circuit is turned on when the air conditioner satisfies the bypass circuit conduction condition.
  • the bypass loop conduction condition comprises:
  • the bypass circuit When the current exhaust gas temperature Tpn is smaller than the exhaust gas temperature Tpn-1 of the compressor that was acquired last time, the bypass circuit is turned on.
  • the method further includes:
  • the method further includes:
  • the determining whether the air conditioner meets the tangential defrosting condition according to the number of times of the bypass defrosting and the temperature Tz includes:
  • the determining whether the air conditioner meets the tangential defrosting condition according to the number of times of the bypass defrosting and the temperature Tz includes:
  • the method further comprises:
  • the bypass circuit When the temperature Tx is less than the first temperature threshold T1 or when Tx-Ty is greater than the sixth temperature threshold T6, the bypass circuit is turned on, the air conditioner is bypassed, and the air conditioner is disconnected when the air conditioner meets the bypass defrost exit condition. Pass the loop.
  • the disconnecting the bypass circuit when the air conditioner meets the bypass defrosting exit condition comprises:
  • the disconnecting the bypass circuit when the air conditioner meets the bypass defrosting exit condition comprises:
  • the disconnecting the bypass circuit when the air conditioner meets the bypass defrosting exit condition comprises:
  • the present invention provides an air conditioner system including a compressor, a four-way valve, an indoor heat exchanger, a throttle unit, and an outdoor microchannel parallel flow heat exchanger connected in series through a pipe, the air conditioner system further including a bypass a loop and a control device for controlling the bypass circuit or the four-way valve reversing, one end of the bypass circuit is connected to the outlet pipe of the outdoor microchannel advancing, and the other end is connected to the outlet pipe of the indoor heat exchanger;
  • the control device includes:
  • the temperature acquisition module is configured to obtain the temperature Tx on the outlet pipe of the outdoor microchannel parallel flow heat exchanger when the first preset time is in the air conditioner operating heating mode; and record the number of bypass defrosting when the bypass circuit is disconnected Obtaining a minimum temperature Tz of the outdoor microchannel parallel flow heat exchanger during defrosting;
  • a control module configured to turn on the bypass circuit when the temperature Tx is less than or equal to the first temperature threshold T1, perform bypass defrosting of the air conditioner, and disconnect the bypass circuit when the bypass defrosting exit condition is satisfied;
  • the four-way valve is controlled to be reversed, and the four-way valve tangential defrosting is performed on the air conditioner.
  • the temperature acquisition module is further configured to: acquire a temperature Ty on an inlet pipe of the outdoor microchannel parallel flow heat exchanger;
  • the control module is further configured to: when the Tx-Ty is greater than the second temperature threshold T6, turn on the bypass loop to perform bypass defrosting of the air conditioner; when the temperature Ty is greater than or equal to the third temperature threshold T3, exit the bypassing Frost.
  • control device further includes a timing module configured to record a running time of recording the bypass defrosting when the bypass circuit is turned on;
  • the control module is further configured to: when the running time of the bypass defrosting is greater than the second preset time, disconnect the bypass circuit and exit the bypass defrosting.
  • the temperature acquisition module is further configured to: acquire a current exhaust gas temperature Tpn of the compressor; and start to acquire an outdoor microchannel parallel flow heat exchanger when the defrosting is started when the bypass circuit of the four-way valve is tangentially turned on The minimum temperature Tz; when disconnecting the bypass circuit, obtaining the temperature Tx on the outlet pipe of the outdoor microchannel parallel flow heat exchanger;
  • the control module is further configured to: when the current exhaust gas temperature Tpn is smaller than the exhaust gas temperature Tpn-1 of the compressor that was acquired last time, turn on the bypass circuit; when the temperature Tz is greater than or equal to the fourth temperature threshold T4, The bypass circuit is opened; when the temperature Tx is greater than or equal to the fifth temperature threshold T5, the four-way valve tangential defrosting is exited.
  • the invention adds a bypass circuit in the air conditioner system, and performs bypass defrosting at low temperature heating, which is beneficial to increase low temperature heat generation, reduce the number of shutdowns during defrosting, and improve the comfort of the microchannel parallel path heat exchanger air conditioner. .
  • the tangential defrosting of the four-way valve is performed every n bypass defrosting cycles, and the bypass circuit is opened at the same time, so that the refrigerant can more uniformly enter each flat tube on the microchannel parallel flow heat exchanger, which can be quickly Moreover, the frost on the heat exchanger is cleanly removed, and the unpurified frost is prevented from affecting the heat exchanger of the heat exchanger in the next cycle, and the heat generation of the air conditioner system is lowered to some extent.
  • FIG. 1 is a schematic structural view of a preferred embodiment of an air conditioner system of the present invention
  • FIG. 2 is a schematic structural view of the outdoor microchannel parallel flow heat exchanger of Figure 1;
  • FIG. 3 is a schematic flow chart of a first embodiment of a defrosting control method for an air conditioner system according to the present invention
  • FIG. 4 is a schematic view showing the flow direction of the refrigerant for bypassing defrosting in the heating mode of the air conditioner system shown in FIG. 1;
  • Figure 5 is a schematic view showing the flow direction of the refrigerant for tangential defrosting of the four-way valve in the heating mode of the air conditioner system shown in Figure 1;
  • FIG. 6 is a schematic flow chart of an embodiment of determining whether a bypass defrosting exits in a defrosting control method of an air conditioner system according to the present invention
  • FIG. 7 is a schematic flow chart showing another embodiment of determining whether a bypass defrosting is exited in a defrosting control method of an air conditioner system according to the present invention.
  • FIG. 8 is a schematic flow chart of a second embodiment of a defrosting control method for an air conditioner system according to the present invention.
  • Figure 9 is a schematic view showing the flow direction of the refrigerant when the four-way valve tangential defrosting combined with the bypass defrosting in the air conditioner system of Figure 1;
  • Figure 10 is a schematic diagram showing the functional modules of the first embodiment of the control device in the air conditioner system of the present invention.
  • Figure 11 is a schematic diagram of the functional blocks of the second embodiment of the control device in the air conditioner system of the present invention.
  • the air conditioner system includes an indoor unit and an outdoor unit.
  • the indoor unit and the outdoor unit are connected by a pipeline to form a loop, and the refrigerant is operated in the loop to realize the indoor unit. It exchanges heat with the outdoor unit to achieve the purpose of cooling and heating the air conditioner.
  • the indoor unit includes an indoor heat exchanger 3 and an indoor fan 4, and the inlet and the outlet of the indoor heat exchanger 3 are respectively connected to the outdoor unit through a pipe.
  • the outdoor unit includes a compressor 1, a four-way valve 2, a throttle member 5, a solenoid valve 6, an outdoor microchannel parallel flow heat exchanger 8, and an outdoor fan 9, which are also connected by a pipe.
  • the throttle member 5 is connected to a pipe between the outdoor microchannel parallel flow heat exchanger 8 and the indoor heat exchanger 3.
  • the exhaust port of the compressor 1 is connected to the interface c of the four-way valve 2, the air return port of the compressor 1 is connected to the interface a of the four-way valve 2, and the interface of the outdoor microchannel parallel flow heat exchanger 8 and the four-way valve 2 is b.
  • the indoor heat exchanger 3 is connected to the interface d of the four-way valve. Moreover, a bypass circuit is provided between the outdoor microchannel parallel flow heat exchanger 8 and the indoor heat exchanger 3.
  • the bypass circuit includes a solenoid valve 6 having one end connected to the outlet pipe of the outdoor microchannel parallel flow heat exchanger 8 and the other end connected to the outlet pipe of the indoor heat exchanger 3. It should be noted that the outdoor microchannel parallel flow heat exchanger and the inlet pipe and the outlet pipe of the indoor heat exchanger mentioned in the embodiments of the present invention are all defined by the refrigerant flow direction of the air conditioner system in the cooling mode.
  • the microchannel parallel flow heat exchanger 8 includes an input pipe 801, a left header 802, a right header 803, a flat pipe 804, fins 805, a distributor 806, and shunt pipes 807, 808, 809. , spacer 810, distributor 811, outlet shunt tubes 813, 814, outlet tube 812, end cap 815.
  • the refrigerant enters the distributor 811 from the outlet pipe 812, and then enters the microchannel flat flow heat exchanger 8 through the outlet diverters 813, 814, respectively, and flows between the separator 810 and the end cap 815.
  • the flat tube After the flat tube enters the distributor 806 for secondary distribution, and then passes through the distribution tubes 807, 808, 809 to the flat tubes above the spacer 810 for secondary evaporation heat exchange.
  • the flow direction of the refrigerant is just opposite to the above, and the refrigerant enters the flat tube heat exchanger from the inlet pipe 801 to the partition 810 and enters the shunt pipes 807, 808, 809 to merge with the distributor 806, and then Enter the flat tube below the septum 810.
  • the temperature of the refrigerant in the flat tube near the spacer 810 during defrosting is low, possibly lower than the temperature of the refrigerant in the outlet tube 812.
  • the air conditioner system of the embodiment of the present invention adds a bypass circuit and cooperates with a corresponding defrosting control method to improve the defrosting efficiency of the air conditioner system.
  • a first embodiment of a defrosting control method for an air conditioner system of the present invention is proposed.
  • the defrosting control method in this embodiment includes the following steps:
  • Step S110 When the air conditioner runs in the heating mode for the first preset time, obtain the temperature Tx on the outdoor microchannel parallel flow heat exchanger outlet pipe 812, and obtain the temperature Ty on the outdoor microchannel parallel flow heat exchanger inlet pipe 801. ;
  • a first temperature sensor 101 is disposed at an outlet pipe 812 of the outdoor microchannel parallel flow heat exchanger 8, and a first pipe is provided at an inlet pipe 801 of the outdoor microchannel parallel flow heat exchanger 8.
  • Three temperature sensor 103 The first temperature sensor 101 is for detecting the temperature Tx on the outlet pipe 812 of the outdoor microchannel parallel flow heat exchanger 8, and the third temperature sensor 103 is for detecting the temperature on the inlet pipe 801 of the outdoor microchannel parallel flow heat exchanger 8. Ty.
  • a timer is also provided in the air conditioner system for timing the running time of the air conditioner operating in the heating mode.
  • the timer is triggered to start to record the running time of the air conditioner in the heating mode.
  • the time recorded by the timer reaches the first preset time, the temperature Tx detected by the first temperature sensor 101 is acquired, and the temperature Ty detected by the third temperature sensor 103 is acquired.
  • Step S120 determining whether Tx is less than the first temperature threshold T1 or Tx-Ty is greater than the sixth temperature threshold T6; if yes, then proceeds to step S130; otherwise, proceeds to step S110;
  • Tx is smaller than the first temperature threshold T1 or Tx-Ty is greater than the sixth temperature threshold T6 to determine whether the air conditioner system enters defrosting.
  • the outdoor microchannel parallel flow detected by the first temperature sensor 101 is acquired at intervals when the air conditioner system operates in the heating mode for the first preset time N1.
  • the temperature Tx on the outlet pipe 812 of the heat exchanger 8 is transferred to step S130 if the temperature Tx is continuously smaller than the first temperature threshold T1 for a consecutive time; otherwise, the external microchannel parallel flow heat exchanger outlet pipe 812 is continuously obtained.
  • Temperature Tx is performed by the outdoor microchannel parallel flow detected by the first temperature sensor 101 is acquired at intervals when the air conditioner system operates in the heating mode for the first preset time N1.
  • the temperature Tx and the interval acquisition on the outlet pipe 812 of the outdoor microchannel parallel flow heat exchanger 8 detected by the first temperature sensor 101 are acquired at intervals.
  • the temperature Ty on the inlet pipe 801 of the outdoor microchannel parallel flow heat exchanger detected by the three temperature sensor 103 if the temperature Tx-Ty is greater than the sixth temperature threshold T6 for a consecutive time, the process proceeds to step S130; otherwise, the acquisition continues.
  • the temperature Tx on the outdoor microchannel parallel flow heat exchanger outlet pipe 812 and the temperature Ty on the inlet pipe 801 of the outdoor microchannel parallel flow heat exchanger are continuously obtained.
  • Step S130 turning on the bypass circuit, performing bypass defrosting on the air conditioner, and disconnecting the bypass circuit when the bypass defrosting exit condition is satisfied;
  • the control solenoid valve 6 When it is judged that defrosting is required, the control solenoid valve 6 is opened to turn on the bypass circuit.
  • the refrigerant at the exhaust port of the compressor 1 is divided into two paths after passing through the four-way valve c interface and the d interface, and flows through the indoor heat exchanger 3 and the throttle member 5 to enter the outdoor microchannel.
  • the flow heat exchanger 8 flows through the bypass circuit into the outdoor microchannel parallel flow heat exchanger 8, and then flows out of the outdoor microchannel parallel flow heat exchanger 8, and returns to the b interface and the a interface of the four-way valve.
  • a circulation circuit of a refrigerant is formed. When the bypass defrosting is performed, the bypass circuit is disconnected once the defrosting exit condition is satisfied.
  • Step S140 when the bypass circuit is disconnected, record the number n of bypass defrosting, or obtain the lowest temperature Tz of the outdoor microchannel parallel flow heat exchanger 8 during defrosting;
  • a second temperature sensor is disposed at a position where the temperature of the outdoor microchannel parallel flow heat exchanger is the lowest at the time of defrosting.
  • the second temperature sensor can then be placed near the flat tube near the spacer 810 to detect the lowest temperature Tz of the outdoor microchannel parallel flow heat exchanger 8 during defrosting.
  • Step S150 determining whether the number n of the bypass defrosting reaches the preset number of times num; if yes, then proceeds to step S160; otherwise, proceeds to step S110;
  • Step S160 determining whether the lowest temperature Tz at the end of the num-1th bypass defrosting is less than the second temperature threshold T2, if yes, then proceeding to step S170; otherwise, proceeding to step S180;
  • the defrosting of the air conditioner system may cause the interval to obtain the lowest temperature Tz of the outdoor microchannel parallel flow heat exchanger 8 detected by the second temperature sensor when the bypass circuit is disconnected, if When the minimum temperature Tz at the end of the num-1 secondary defrosting is continuously smaller than the second temperature threshold T2 for m times, the process proceeds to step S170.
  • Step S170 controlling the four-way valve 2 to reverse the direction, and performing tangential defrosting of the four-way valve on the air conditioner.
  • the four-way valve 2 is controlled to be reversed,
  • the air conditioner performs tangential defrosting of the four-way valve.
  • the refrigerant of the exhaust port of the compressor 1 passes through the four-way valve c interface, the b interface, and then flows through the outdoor microchannel parallel flow heat exchanger 8, the throttle member 5, and the indoor heat exchanger 3, and then The d interface and the a interface of the four-way valve are returned to the compressor 1 to form a circulation circuit of the refrigerant.
  • the minimum temperature Tz of the outdoor microchannel parallel flow heat exchanger is greater than or equal to the second
  • the temperature threshold T2 indicates that the frost in the air conditioner system has been cleaned, and it is not necessary to enter the four-way valve tangential defrosting.
  • the air conditioner is controlled to enter the normal heating mode, the running time of the heating mode is re-timed, and the previous bypass defrosting number n is cleared, and then the process returns to step S110.
  • the invention adds a bypass circuit to the air conditioner system, and performs bypass defrosting at the time of low temperature heating, and when the bypass defrosting is not clean, the directional defrosting of the four-way valve is performed, which not only helps to improve the low-temperature heating, but also Reduce the number of downtimes and improve the comfort of the microchannel parallel path heat exchanger air conditioner.
  • the disconnecting the bypass loop when the bypass defrosting exit condition is satisfied in the above step 130 includes:
  • Step S131a obtaining the temperature Ty on the inlet tube 801 of the outdoor microchannel parallel flow heat exchanger
  • a third temperature sensor 103 is disposed on the inlet pipe 801 of the outdoor microchannel parallel flow heat exchanger, and the third temperature sensor 103 is used to detect the outdoor microchannel parallel flow heat exchanger inlet pipe 801. Temperature Ty on. When the bypass loop is turned on, the temperature Ty detected by the third temperature sensor is acquired.
  • Step S132a determining whether Ty is greater than or equal to the third temperature threshold T3; when Ty is greater than or equal to the third temperature threshold T3, proceeds to step S133a; when Ty is less than the third temperature threshold T3, proceeds to step S131a;
  • Ty is greater than or equal to the third temperature threshold T3 to determine whether to exit the bypass defrosting.
  • the third temperature threshold T3 In order to prevent the abnormality of the temperature and cause the defrosting of the air conditioner system to be defrosted, after the bypass circuit is turned on, the interval on the inlet pipe 801 of the outdoor microchannel parallel flow heat exchanger 8 detected by the third temperature sensor 103 is acquired.
  • the temperature Ty if the temperature Ty is less than the third temperature threshold T3 for b consecutive times, proceeds to step S131a; otherwise, proceeds to step S133a.
  • Step S133a exiting the bypass defrosting.
  • the temperature Ty on the inlet pipe 801 of the outdoor microchannel parallel flow heat exchanger is detected, and according to the temperature Ty, whether or not the bypass defrosting is exited is determined.
  • the disconnecting the bypass loop when the bypass defrosting exit condition is satisfied in the above step 130 includes:
  • Step S131b recording the running time TM2 of the bypass defrosting
  • the timer in the above air conditioner system also records the running time TM2 of the bypass defrosting when the bypass defrosting is started.
  • Step S132b determining whether TM2 is less than or equal to the second preset time; when TM2 is less than or equal to the second preset time, proceeds to step S133b; when TM2 is greater than the second preset time, proceeds to step S135b;
  • TM2 is less than or equal to the second preset time to determine whether to exit the bypass defrosting.
  • Step S133b obtaining the temperature Ty on the inlet tube 801 of the outdoor microchannel parallel flow heat exchanger
  • Step S134b determining whether Ty is greater than or equal to the third temperature threshold T3; when Ty is greater than or equal to the third temperature threshold T3, proceeds to step S135b; when Ty is less than the third temperature threshold T3, proceeds to step S133b;
  • Ty is greater than or equal to the third temperature threshold T3 to determine whether to exit the bypass defrosting.
  • the third temperature threshold T3 In order to prevent the abnormality of the temperature and cause the defrosting of the air conditioner system to be defrosted, after the bypass circuit is turned on, the interval on the inlet pipe 801 of the outdoor microchannel parallel flow heat exchanger 8 detected by the third temperature sensor 103 is acquired.
  • the temperature Ty if the temperature Ty is less than the third temperature threshold T3 for b consecutive times, proceeds to step S135b; otherwise, proceeds to step S133b.
  • Step S135b exiting the bypass defrosting.
  • not only the temperature Ty on the inlet pipe of the outdoor microchannel parallel flow heat exchanger but also the setting of the second preset time can avoid the excessive time of the bypass defrosting and affect the normal heating time.
  • step S170 a second embodiment of a defrosting control method for an air conditioner system is proposed. Based on the above embodiment, in the embodiment, in step S170, the method further includes:
  • Step S190 obtaining a current exhaust gas temperature Tpn of the compressor
  • a fourth temperature sensor 102 is provided at the exhaust port of the compressor.
  • the air conditioner system enters the four-way valve tangential defrosting, it will start to acquire the exhaust gas temperature Tpn of the compressor 1.
  • the exhaust gas temperature of the compressor is acquired at intervals of a certain time, and the interval time is acquired every 5 seconds.
  • Step S200 it is determined whether Tpn is smaller than the exhaust gas temperature Tpn-1 of the compressor that was acquired last time, if yes, go to step S210; otherwise, go to step S190;
  • the two exhaust gas temperatures of the obtained compressor are compared to determine whether the bypass circuit needs to be turned on.
  • Step S210 turning on the bypass circuit
  • the control solenoid valve 6 When Tpn is less than Tpn-1, the control solenoid valve 6 is opened to turn on the bypass circuit.
  • the refrigerant of the exhaust port of the compressor 1 passes through the four-way valve c interface and the b interface, enters the outdoor microchannel parallel flow heat exchanger 8, and is discharged by the outdoor microchannel parallel flow heat exchanger 8 and is divided into Two ways, after flowing through the throttle unit 5 into the indoor heat exchanger, the d interface and the a interface of the four-way valve are returned to the compressor 1 to form a circulation circuit of the refrigerant. The other path is bypassed, and then the d interface and the a interface of the four-way valve are returned to the compressor 1 to form a circulation circuit of the refrigerant.
  • Step S220 obtaining a minimum temperature Tz of the outdoor microchannel parallel flow heat exchanger
  • the lowest temperature Tz of the outdoor microchannel parallel flow heat exchanger detected by the second temperature sensor is obtained.
  • Step S230 determining whether Tz is greater than or equal to the fourth temperature threshold T4, when Tz is greater than the fourth temperature threshold, proceeds to step S240; when Tz is less than the fourth temperature threshold T4, proceeds to step S220;
  • Tz is greater than the fourth temperature threshold T4 to determine whether to disconnect the bypass loop.
  • the minimum temperature Tz of the outdoor microchannel parallel flow heat exchanger 8 detected by the second temperature sensor is obtained after the bypass circuit is turned on, if If the temperature Tz is greater than or equal to the fourth temperature threshold T4 for c consecutive times, the process goes to step S240; otherwise, the process goes to step S220.
  • Step S240 disconnecting the bypass circuit
  • Step S250 obtaining the temperature Tx on the outdoor microchannel parallel flow heat exchanger outlet pipe 812;
  • the temperature Tx on the outlet pipe 812 of the outdoor microchannel parallel flow heat exchanger 8 detected by the first temperature sensor 101 is acquired.
  • Step S260 determining whether Tx is greater than or equal to the fifth temperature threshold T5, when Tx is greater than or equal to the fifth temperature threshold T5, then proceeds to step S270; when Tx is less than the fifth temperature threshold T5, proceeds to step S250;
  • Tx is greater than or equal to the fifth temperature threshold T5 to determine whether to exit the four-way valve to switch the defrosting.
  • the interval on the outlet pipe 812 of the outdoor microchannel parallel flow heat exchanger 8 detected by the first temperature sensor 101 is obtained after the bypass circuit is disconnected.
  • the temperature Tx if the temperature Tx is greater than or equal to the first temperature threshold T5 for d consecutive times, then proceeds to step S270; otherwise, proceeds to step S250.
  • Step S270 the four-way valve tangential defrosting is exited, and the process proceeds to step S180.
  • Tx is greater than or equal to the fifth temperature threshold T5
  • the four-way valve tangential defrosting is exited, the normal heating mode is entered, and the recorded bypass defrosting number n is cleared.
  • Tx is less than the fifth temperature threshold T5
  • the temperature Tx on the outdoor microchannel parallel flow heat exchanger outlet pipe 812 is continuously acquired.
  • each flat tube on the parallel flow heat exchanger can quickly and cleanly remove the frost on the heat exchanger, avoiding the uncleaned frost from affecting the heat exchanger of the next cycle, and improving the low temperature system of the air conditioner system to some extent. Heat.
  • the air conditioner system enters the heating mode, and the air conditioner system running time TM1 and the bypass circuit running time TM2 are cleared and then timed.
  • the air conditioner system running time TM1 reaches the first preset time (for example, 10-15 minutes)
  • the first temperature sensor 101 of the rear outdoor microchannel parallel flow heat exchanger 8 starts to operate, and the temperature Tx is detected every 20 seconds, and then the control module 202 determines whether Tx satisfies Tx ⁇ -3 ° C for 9 consecutive times.
  • the bypass circuit is opened, and the air conditioner is bypassed.
  • the outdoor fan is turned off, the indoor fan is operated according to the anti-cold wind, the bypass circuit running time TM2 starts counting, and then the control module determines whether TM2 is greater than or equal to the standard defrosting time TM0, and if TM2 ⁇ TM0, then Open bypass circuit; if TM2 ⁇ TM0, the third temperature sensor 103 detects the temperature Ty of the outdoor microchannel parallel flow heat exchanger 8 every 20 seconds, and then the control module 202 determines whether the temperature Ty is greater than or equal to 5 ° C for three consecutive times, if the temperature is maintained for three consecutive times Ty If ⁇ 5 °C, the bypass circuit is disconnected, otherwise the temperature Ty of the outdoor microchannel parallel flow heat exchanger 8 is continuously detected. When the bypass circuit is disconnected, the second temperature sensor detects the lowest temperature Tz of the outdoor microchannel parallel flow heat exchanger 8 every 20 seconds.
  • the control module 202 determines that the number of bypass defrostings n reaches the preset number of times six times and determines that the lowest temperature Tz of the outdoor microchannel parallel flow heat exchanger is less than 3 ° C at the end of the fifth bypass defrosting.
  • the control module 202 controls the four-way valve to reverse, the indoor and outdoor fans are turned off, and the system enters the normalized frost mode.
  • the fourth temperature sensor 102 will detect the exhaust gas temperature Tpn of the compressor every 5 seconds, and the control module 202 determines the exhaust temperature of the compressors before and after, and when the Tpn-Tpn-1 ⁇ 0 ° C, the bypass The loop opens.
  • the second temperature sensor detects the lowest temperature Tz of the outdoor parallel flow heat exchanger, and the control module 202 determines whether the temperature Tz is greater than or equal to 5 ° C for three consecutive times, and controls the bypass when the temperature Tz ⁇ 5 ° C.
  • the loop is closed.
  • the first temperature sensor 101 detects the temperature Tx of the outdoor microchannel parallel flow heat exchanger, and the control module 202 determines whether the temperature T1 ⁇ 5 ° C for three consecutive times, and when the temperature T1 ⁇ 5 ° C for three consecutive times, the control is performed.
  • the air conditioner exits the four-way valve and the tangential defrost ends, and the air conditioner system enters the normal heating mode.
  • the air conditioner system further includes a control device that controls the tangential direction of the four-way valve and the on or off of the bypass circuit according to the defrosting control method.
  • the control device includes:
  • the temperature obtaining module 201 is configured to acquire the temperature Tx on the outdoor microchannel parallel flow heat exchanger outlet pipe 812 when the first preset time is used in the air conditioner operating heating mode, and obtain the outdoor microchannel parallel flow heat exchanger inlet pipe.
  • a counting module 203 configured to record the number of times of bypassing defrosting when the bypass circuit is disconnected;
  • the control module 202 is configured to: when the temperature Tx is less than or equal to the first temperature threshold T1 or when the Tx-Ty is greater than the sixth temperature threshold T6, turn on the bypass circuit, perform bypass defrosting of the air conditioner, and satisfy the bypass defrosting
  • the bypass circuit is disconnected when the condition is exited; when the minimum number of times of the bypass defrosting reaches the preset number of times and the lowest temperature Tz at the end of the last bypass defrosting is less than the second temperature threshold T2, the four-way valve is reversed, and the air conditioner is Perform a four-way valve tangential defrosting.
  • the temperature acquisition module 201 is configured to acquire the temperature Tx on the outdoor microchannel parallel flow heat exchanger outlet pipe 812 detected in the first temperature sensor 101 on the air conditioner system, and acquire the third temperature sensor on the air conditioner system.
  • the control module 202 will then determine if the defrosting is to be entered based on the temperature Tx or Tx-Ty. That is, when the temperature Tx is less than or equal to the first temperature threshold T1, or when Tx-Ty is greater than the sixth temperature threshold T6, the bypass defrosting is turned on to bypass the air conditioner.
  • the counting module 203 After performing a bypass defrosting, the counting module 203 will count the number of bypass defrostings, and the temperature acquiring module 201 will also acquire the lowest temperature of the outdoor microchannel parallel flow heat exchanger detected by the second temperature sensor during defrosting. Tz.
  • the control module 202 will then determine whether or not to perform a four-way valve tangential defrost based on the number of bypass defrostings and the temperature Tz. That is, when the number of times of the bypass defrosting reaches the preset number num and the lowest temperature Tz of the outdoor microchannel parallel flow heat exchanger is less than the second temperature threshold T2 at the end of the num-1th bypass defrosting, the control module 202 controls the four-way valve. Reversing, tangential defrosting of the four-way valve on the air conditioner.
  • the invention adds a bypass circuit in the air conditioner system, and performs bypass defrosting at low temperature heating, which is beneficial to increase low temperature heat generation, reduce the number of shutdowns during defrosting, and improve the comfort of the microchannel parallel path heat exchanger air conditioner. .
  • a four-way valve tangential defrosting is performed, and the bypass valve is opened at the same time, so that the refrigerant more uniformly enters each flat tube on the microchannel parallel flow heat exchanger, and can be quickly
  • the frost on the heat exchanger is cleanly removed, and the unpurified frost is prevented from affecting the heat exchanger of the next cycle, which improves the low-temperature heat generation of the air conditioner system to some extent.
  • control module 202 is further configured to: when the temperature Ty is greater than or equal to the third temperature threshold T3, exit the bypass defrosting.
  • the temperature acquisition module 201 When performing the bypass defrosting, the temperature acquisition module 201 will acquire the temperature Ty on the outdoor microchannel parallel flow heat exchanger inlet pipe 801 detected by the third temperature sensor 103, and then the control module 202 determines whether to exit according to the temperature Ty. Bypass defrosting. That is, when the temperature Ty is greater than or equal to the third temperature threshold T3, the controller controls the solenoid valve 6 to open and exit the bypass defrosting.
  • control device further includes a timing module 204 for recording the running time of the bypass defrosting when the bypass circuit is turned on.
  • the control module 202 is further configured to: when the running time of the bypass defrosting is greater than the second preset time, disconnect the bypass circuit and exit the bypass defrosting.
  • the timing module 204 will record the running time of the bypass defrosting.
  • the control module 202 determines whether to exit the bypass defrosting based on the running time of the bypass defrosting. That is, when the running time of the bypass defrosting is greater than the second preset time, the control module 202 controls the solenoid valve 6 to be disconnected to exit the bypass defrosting; the running time of the bypass defrosting is less than or equal to the second preset time
  • the temperature acquisition module 201 continues to acquire the temperature Ty on the outdoor microchannel parallel flow heat exchanger inlet pipe 801 detected by the third temperature sensor 103.
  • the control module determines whether to exit the bypass defrosting according to the temperature Ty. In this embodiment, not only the temperature Ty on the inlet pipe 801 of the outdoor microchannel parallel flow heat exchanger, but also the setting of the second preset time can avoid the excessive time of the bypass defrosting and affect the normal heating time.
  • the temperature acquiring module 201 is further configured to: acquire a current exhaust gas temperature Tpn of the compressor; and start acquiring an outdoor microchannel parallel flow heat exchanger when the defrosting is started when the bypass circuit of the four-way valve is tangentially turned on The lowest temperature Tz; when the bypass circuit is disconnected, the temperature Tx on the outdoor microchannel parallel flow heat exchanger outlet pipe 812 is obtained.
  • the control module 202 is further configured to: when the current exhaust gas temperature Tpn is smaller than the exhaust gas temperature Tpn-1 of the compressor that was acquired last time, turn on the bypass circuit; when the temperature Tz is greater than the fourth temperature threshold T4, disconnect the side Passing the loop; when the temperature Tx is greater than the fifth temperature threshold T5, the four-way valve tangential defrosting is exited.
  • a fourth temperature sensor 102 is provided at the exhaust port of the compressor.
  • the temperature acquisition module 201 will start to acquire the exhaust gas temperature Tpn of the compressor 1 detected by the fourth temperature sensor 102.
  • the exhaust gas temperature of the compressor is acquired at intervals of a certain time, and the interval time is acquired every 5 seconds.
  • the control module 202 determines whether to turn on the bypass circuit based on the comparison of the exhaust temperatures of the two compressors before and after the acquired compressor. That is, when Tpn is smaller than Tpn-1, the control solenoid valve 6 is opened to turn on the bypass circuit.
  • the temperature acquisition module 201 After the bypass loop is turned on, the temperature acquisition module 201 will acquire the lowest temperature Tz of the outdoor microchannel parallel flow heat exchanger detected by the second temperature sensor. The control module 202 then determines whether to disconnect the bypass loop based on the temperature Tz. That is, when Tz is greater than or equal to the fourth temperature threshold T4, the bypass loop is disconnected. After the bypass circuit is disconnected, the temperature acquisition module 201 acquires the temperature Tx on the outlet pipe 812 of the outdoor microchannel parallel flow heat exchanger detected by the first temperature sensor 101. The control module 202 then determines whether to exit the four-way valve tangential defrosting based on the temperature Tx. That is, when Tx is greater than or equal to the fifth temperature threshold T5, the four-way valve tangential defrosting is exited and the normal heating mode is entered.
  • the temperature acquiring module 201 can be a first temperature sensor, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor respectively disposed on the air conditioner system.
  • serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.
  • those skilled in the art can clearly understand that the foregoing method can be implemented by means of software and a necessary general hardware platform.
  • the functions of the above control device can also be implemented by hardware, but many In the case of the former is a better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, In the optical disc, a number of instructions are included to cause the air conditioner to perform the methods described in various embodiments of the present invention.

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Abstract

L'invention concerne un procédé de commande de dégivrage pour un système de climatiseur qui comprend les étapes suivantes : lorsqu'il est déterminé qu'un climatiseur est dans un état d'entrée de dégivrage, connecter une boucle de dérivation; lorsqu'un état de sortie de dégivrage par dérivation est rencontré, déconnecter la boucle de dérivation; lorsque la boucle de dérivation est déconnectée, enregistrer le nombre de fois de dégivrage par dérivation, et obtenir une température la plus basse Tz d'un échangeur thermique à écoulement parallèle (8) d'un microcanal extérieur lorsque le dégivrage est réalisé; lorsque le nombre de fois de dégivrage par dérivation atteint le nombre pré-établi de fois et la température la plus basse Tz est inférieure à un second seuil de température T2 lorsqu'un dégivrage par dérivation précédent est terminé, commander une vanne à quatre voies (2) pour changer une direction, et réaliser un dégivrage tangentiel du climatiseur à l'aide de la vanne à quatre voies (2). L'invention concerne également un système de climatiseur. Un dégivrage par dérivation est réalisé pendant un chauffage à basse température, ce qui aide à augmenter une quantité du chauffage à basse température et réduit le nombre d'interruptions machine.
PCT/CN2013/090591 2013-09-26 2013-12-26 Système de climatiseur et son procédé de commande de dégivrage Ceased WO2015043097A1 (fr)

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CN201688636U (zh) * 2010-05-11 2010-12-29 广东美的集团芜湖制冷设备有限公司 热泵式空调器除霜装置
JP2012167860A (ja) * 2011-02-14 2012-09-06 Mitsubishi Heavy Ind Ltd ヒートポンプ式空気調和機およびその除霜方法
CN102878663A (zh) * 2011-07-15 2013-01-16 珠海格力电器股份有限公司 一种能够提高制热效果的空调系统及其化霜控制方法
CN102853502A (zh) * 2012-09-29 2013-01-02 广东美的制冷设备有限公司 一种热泵空调机组的化霜控制方法

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CN109163416A (zh) * 2018-08-13 2019-01-08 珠海格力电器股份有限公司 一种设备的化霜控制方法和装置、设备
CN109163416B (zh) * 2018-08-13 2023-06-30 珠海格力电器股份有限公司 一种设备的化霜控制方法和装置、设备
CN114396707A (zh) * 2022-01-14 2022-04-26 珠海格力电器股份有限公司 空调器的防冻结控制方法和装置
CN114396707B (zh) * 2022-01-14 2023-02-28 珠海格力电器股份有限公司 空调器的防冻结控制方法和装置
CN115419965A (zh) * 2022-09-14 2022-12-02 珠海格力电器股份有限公司 空调器及其控制方法及装置

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