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Title:
OIL RETURN CONTROL METHOD FOR MULTI-SPLIT AIR-CONDITIONING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/233343
Kind Code:
A1
Abstract:
An oil return control method for a multi-split air-conditioning system, comprising: when a multi-split air-conditioning system meets an oil return condition, adjusting the refrigerant flow direction to make the multi-split air-conditioning system in a cooling mode; turning off an outdoor throttling element of the outdoor unit; and keeping the multi-split air-conditioning system running in the current working state for a preset period of time.

Inventors:
SONG, Deyue (No. 1 Haier RoadLaoshan Distric, Qingdao Shandong 1, CN)
WANG, Haisheng (No. 1 Haier RoadLaoshan Distric, Qingdao Shandong 1, CN)
ZHANG, Ming (No. 1 Haier RoadLaoshan Distric, Qingdao Shandong 1, CN)
Application Number:
PCT/CN2021/094640
Publication Date:
November 25, 2021
Filing Date:
May 19, 2021
Export Citation:
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Assignee:
QINGDAO HAIER AIR-CONDITIONING ELECTRONIC CO., LTD (No. 1 Haier Road Laoshan Distric, Qingdao Shandong 1, CN)
HAIER SMART HOME CO., LTD. (No. 1 Haier Road Laoshan Distric, Qingdao Shandong 1, CN)
International Classes:
F24F1/0003; F24F5/00
Attorney, Agent or Firm:
HANRAY LAW FIRM (Century Square99 Wangfujing Street, Dongcheng District, Beijing 6, CN)
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