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Title:
AIR CONDITIONER AND SELF-CLEANING CONTROL METHOD FOR OUTDOOR UNIT THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/024721
Kind Code:
A1
Abstract:
An air conditioner (10) and a self-cleaning control method for an outdoor unit (200) thereof. An outdoor unit heat exchange assembly (210) comprises: a first outdoor heat exchanger (211) and a second outdoor heat exchanger (212) connected in series; the first outdoor heat exchanger (211) is connected to a compressor (250) by means of a refrigerant flow direction switching device (260); an electronic expansion valve (230) is provided between the first outdoor heat exchanger (211) and the second outdoor heat exchanger (212). Moreover, the control method comprises: a self-cleaning controller (150) adjusts the refrigerant flow direction switching device (260) to a state in which a compressed refrigerant is provided to an indoor unit heat exchange assembly (110), adjusts the opening degree of the electronic expansion valve (230) so that frosting is continued on the surface of the first outdoor heat exchanger (211), switches the refrigerant flow direction switching device (260) after a preset first defrosting condition is met, so that the flow direction of the refrigerant is reversed, and removes attached contaminants with water formed by defrosting to implement self-cleaning of the first outdoor heat exchanger (211); the self-cleaning controller (150) continues adjusting the opening degree of the electronic expansion valve (230) so that the frosting is continued on the surface of the second outdoor heat exchanger (212), adjusts the opening degree of the electronic expansion valve (230) to the maximum after a preset second defrosting condition is met, so that the second outdoor heat exchanger (212) releases heat, and removes the attached contaminants with water formed by defrosting to implement self-cleaning of the second outdoor heat exchanger (212).

Inventors:
LIU CHAOCHAO (CN)
YANG ZHONGFENG (CN)
YUAN JUNJUN (CN)
Application Number:
PCT/CN2018/096849
Publication Date:
February 07, 2019
Filing Date:
July 24, 2018
Export Citation:
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Assignee:
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD (CN)
International Classes:
F24F11/00
Foreign References:
CN106765926A2017-05-31
CN101451779A2009-06-10
CN107525220A2017-12-29
US5186016A1993-02-16
CN101469926A2009-07-01
Attorney, Agent or Firm:
WISEAST INTELLECTUAL PROPERTY LAW FIRM (CN)
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