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    MULTI-SPLIT AIR CONDITIONER, AND METHOD AND APPARATUS FOR CONTROLLING SAME
    1.
    发明公开
    MULTI-SPLIT AIR CONDITIONER, AND METHOD AND APPARATUS FOR CONTROLLING SAME 审中-实审

    公开(公告)号：EP4407248A1

    公开(公告)日：2024-07-31

    申请号：EP22939855.7

    申请日：2022-11-17

    申请人： Qingdao Haier Air-Conditioning Electronic Co., Ltd ,  Qingdao Haier Air Conditioner General Corp., Ltd. ,  Haier Smart Home Co., Ltd.

    发明人： LIU, Donglai ,  YUAN, Yizhong ,  LU, Dahai ,  MAO, Shoubo

    IPC分类号： F24F11/84

    CPC分类号： F25B49/02 ,  F25B40/02 ,  F25B41/24 ,  F24F13/24 ,  F24F11/84 ,  F24F1/0063 ,  F24F11/81 ,  Y02B30/70

    摘要： The present application relates to the technical field of multi-split air conditioners, and discloses a multi-split air conditioner comprising an outdoor unit and a group of indoor units, the group of indoor units comprising a plurality of indoor units connected in parallel, at least one indoor unit comprising: a main flow path, comprising an electronic expansion valve and an indoor heat exchanger successively connected via a main pipeline, at least part of the main pipeline located at a refrigerant inlet end of the electronic expansion valve being used as a supercooling parallel section; a supercooling branch, comprising a supercooler, the supercooling branch being connected in parallel to the supercooling parallel section; and a communication switching assembly, configured to be controlled to communicate the supercooling parallel section and/or the supercooling branch with the electronic expansion valve. The present application allows for enhancing the degree of supercooling in front of the electronic expansion valve, thus increasing the stability of a refrigerant during a throttling process, and thereby achieving the aim of reducing abnormal throttling noise at the indoor side of the multi-split air conditioner. The present application further discloses a method and apparatus for controlling a multi-split air conditioner.

    CONTROL METHOD AND DEVICE FOR AIR CONDITIONER
    6.
    发明公开
    CONTROL METHOD AND DEVICE FOR AIR CONDITIONER 审中-公开

    公开(公告)号：EP3620724A1

    公开(公告)日：2020-03-11

    申请号：EP18801309.8

    申请日：2018-04-28

    申请人： Qingdao Haier Air Conditioner General Corp., Ltd.

    发明人： LI, Haijun ,  ZHANG, Qiang ,  YANG, Qing ,  WANG, Fang ,  ZHAO, Feng ,  WANG, Caiping

    IPC分类号： F24F11/00

    摘要： A control method for an air conditioner includes: determining the frosting state of an indoor unit when an air conditioner is operated in a refrigeration mode (S301); and controlling to block a refrigerant pipeline flowing to the indoor unit (S302) when the indoor unit frosts in the refrigeration mode. According to the control method, by controlling to block the refrigerant pipeline flowing to a heat exchanger which frosts, continuous input of a low-temperature refrigerant to the frosted heat exchanger can be stopped, so as to avoid further aggravation of the frosting problem. Moreover, the heat exchanger can be naturally defrosted and deiced by means of the temperature of an environment of the heat exchanger, so as to achieve the freezing protection effect for the heat exchanger of the air conditioner. A control device for an air conditioner is further disclosed.

    HEATING CONTROL METHOD AND DEVICE FOR AIR CONDITIONER
    7.
    发明公开
    HEATING CONTROL METHOD AND DEVICE FOR AIR CONDITIONER 审中-公开

    公开(公告)号：EP3561406A1

    公开(公告)日：2019-10-30

    申请号：EP18775429.6

    申请日：2018-03-05

    申请人： Qingdao Haier Air Conditioner General Corp., Ltd.

    发明人： LIU, Juke ,  XU, Beibei ,  XU, Guojing

    IPC分类号： F24F11/00

    摘要： An air conditioner heating mode control method includes: Step 11: obtaining an indoor temperature and comparing the indoor temperature with a first indoor temperature threshold as an air conditioner running at the heating mode; Step 12: performing a dual PID control process if the indoor temperature is less than or equal to the first indoor temperature threshold; wherein the dual PID control process including: calculating the difference between the indoor temperature and a set indoor target temperature to obtain a indoor temperature difference; performing a PID calculation according to the indoor temperature difference to obtain a first target frequency; obtaining a coil temperature of an indoor unit heat exchanger; calculating the temperature difference between the coil temperature and a coil target temperature to obtain a coil temperature difference; performing a PID calculation according to the coil temperature difference to obtain a second target frequency; comparing the first target frequency with the second target frequency; and performing a frequency control on the compressor in which the greater one between the first target frequency and the second target frequency is used as the target frequency; wherein the coil target temperature is determined according to the indoor temperature. The present invention also discloses an air conditioner heating mode control device.

    COOLING DEVICE FOR AIR CONDITIONER CIRCUIT BOARD
    8.
    发明公开
    COOLING DEVICE FOR AIR CONDITIONER CIRCUIT BOARD 审中-公开

    公开(公告)号：EP3470746A1

    公开(公告)日：2019-04-17

    申请号：EP17812399.8

    申请日：2017-02-20

    申请人： Qingdao Haier Air Conditioner General Corp., Ltd.

    发明人： WANG, Fei ,  GAO, Baohua ,  FU, Yu ,  ZHANG, Mingjie

    IPC分类号： F24F1/24 ,  F24F13/30

    摘要： A cooling device for air conditioner circuit board, comprising a compressor (1), an outdoor heat exchanger (2), a gas-liquid separator (3), and an indoor heat exchanger (4) which are connected in sequence. A gas outlet end of the gas-liquid separator (3) is communicated with a gas suction port of the compressor (1) by means of a cooling pipeline (5), and a cooling equipment (6) for cooling the air conditioner circuit board is provided on the cooling pipeline (5). The problem in the prior art that the user comfort degree may be affected because frequency and heat exchange amount of an air conditioner cannot be coordinated is resolved.