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Title:
EXPANSION VALVE CONTROL METHOD FOR MULTI-SPLIT AIR-CONDITIONING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/012967
Kind Code:
A1
Abstract:
The present invention belongs to the technical field of heat exchange, and specifically relates to an expansion valve control method for a multi-split air-conditioning system. The present invention aims to solve the problem that it is not possible for an existing detection manner to detect the leakage of an expansion valve of a multi-split air-conditioning system in an accurate and timely manner. To this end, the multi-split air-conditioning system of the present invention comprises an outdoor unit and a plurality of indoor units connected to the outdoor unit, wherein each of the indoor units is connected to the outdoor unit by means of a first pipeline and a second pipeline. The expansion valve control method of the present invention comprises: acquiring an indoor temperature of an environment where an indoor unit is located; acquiring the temperature of a first pipeline of the indoor unit and the temperature of a second pipeline of the indoor unit when the indoor unit is in a shutdown state; and according to the indoor temperature of the environment where the indoor unit is located, the temperature of the first pipeline of the indoor unit and the temperature of the second pipeline of the indoor unit, determining the leakage condition of an expansion valve of the indoor unit, such that the multi-split air-conditioning system can detect the leakage condition of the expansion valve in a timely and accurate manner.

Inventors:
ZHUO BAITIAN (CN)
SHI BIN (CN)
CHENG SHAOJIANG (CN)
ZHANG RUIGANG (CN)
WANG JUN (CN)
Application Number:
PCT/CN2020/101316
Publication Date:
January 28, 2021
Filing Date:
July 10, 2020
Export Citation:
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Assignee:
QINGDAO HAIER AIR CONDITIONING ELECTRONIC CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
International Classes:
F24F11/36; F24F11/64; F24F11/89; F25B49/02
Foreign References:
CN105953483A2016-09-21
CN105953483A2016-09-21
CN109405173A2019-03-01
CN105485869A2016-04-13
JP2009145005A2009-07-02
JP2003294293A2003-10-15
Attorney, Agent or Firm:
HANRAY LAW FIRM (CN)
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