Defrosting control method for multi-split system

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United States of America

PATENT NO 11320185
APP PUB NO 20200208890A1
SERIAL NO

16631332

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Abstract

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A defrosting control method for a multi-split system is provided. A multi-split system comprises an outdoor unit and multiple indoor units. An expansion valve is provided on a connecting pipeline between each of the indoor units and the outdoor unit. When the expansion valve of each activated indoor unit is closed and the degree of opening of the expansion valve of each off-state indoor unit is less than or equal to a maximum set degree of opening, the system satisfies a defrosting requirement, and as a result the method controls the expansion valve of each activated indoor unit to remain closed, thereby resolving the issue of a dramatic temperature drop in a room having an activated indoor unit during defrosting and improving user satisfaction. The degree of opening of the expansion valve of a off-state indoor unit is Off_PLS, and is controlled such that Off_PLS=ALL_HP*Avg_PLS/Off_HP. The invention satisfies a defrosting requirement and reduces the degree of opening of the expansion valves as much as possible, thereby preventing damage to a compressor without affecting defrosting.

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Patent Owner(s)

Patent OwnerAddress
QINGDAO HAIER AIR-CONDITIONING ELECTRONIC CO LTDHAIER INDUSTRIAL PARK NO 1 HAIER ROAD LAOSHAN DISTRICT QINGDAO SHANDONG 266101 266101

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cheng, Shaojiang Qingdao, CN 18 8
Shi, Bin Qingdao, CN 82 596
Zhang, Ruigang Qingdao, CN 43 51
Zhang, Wanying Qingdao, CN 3 5
Zhuo, Baitian Qingdao, CN 16 5

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