Title:
ANTI-FROST CONTROL METHOD FOR AIR CONDITIONER AND AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2022/267886
Kind Code:
A1
Abstract:
The present invention relates to an anti-frost control method for an air conditioner and an air conditioner using the control method. The air conditioner is provided with a bypass circuit between an exhaust port and suction port of a compressor. A part of the bypass circuit is coupled to the bottom part of an outdoor heat exchanger. Furthermore, the bypass circuit is provided with an injection valve located between the exhaust port and the bottom part. The control method comprises: detecting an outdoor ambient temperature; comparing the outdoor ambient temperature to a first preset temperature; when the outdoor ambient temperature is less than the first preset temperature, starting to determine whether the air conditioner needs to enter an anti-frosting mode; detecting the coil temperature of the outdoor heat exchanger and acquiring a disconnection duration of the injection valve; and when the coil temperature is less than a first difference between the outdoor ambient temperature and a first temperature correction value and lasts for a first preset duration, and the disconnection duration of the injection valve is greater than or equal to a second preset duration, the air conditioner enters the anti-frosting mode to control the injection valve to close. The air conditioner of the present invention can effectively prevent frosting during low-temperature heating.
Inventors:
WNAG JIANYING (CN)
LEI YANYAO (CN)
AN CHAO (CN)
LEI YANYAO (CN)
AN CHAO (CN)
Application Number:
PCT/CN2022/097576
Publication Date:
December 29, 2022
Filing Date:
June 08, 2022
Export Citation:
Assignee:
QINGDAO HAIER AIR CONDITIONING ELECTRONIC CO LTD (CN)
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD (CN)
HAIER SMART HOME CO LTD (CN)
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD (CN)
HAIER SMART HOME CO LTD (CN)
International Classes:
F24F11/42; F24F11/61; F24F11/64; F24F11/65; F24F11/84; F24F11/88; F24F110/12; F24F140/20
Foreign References:
| CN203908148U | 2014-10-29 | |||
| CN106016809A | 2016-10-12 | |||
| CN113465127A | 2021-10-01 | |||
| JPH02275261A | 1990-11-09 |
Attorney, Agent or Firm:
HANRAY LAW FIRM (CN)
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