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Title:
CONTROL METHOD FOR HEAT PUMP SYSTEM AND HEAT PUMP SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/024881
Kind Code:
A1
Abstract:
A control method for a heat pump system and a heat pump system. The heat pump system comprises a throttling element and a four-way valve (3); the four-way valve (3) has a first state when the heat pump system runs for refrigerating and a second state when the heat pump system runs for heating. The control method comprises: before the four-way valve (3) is switched to the second state from the first state, comparing a reversing pressure difference A of the four-way valve (3) and a current system high and low pressure difference B of the heat pump system, and controlling switching of the state of the four-way valve (3) and/or adjusting the opening degree of the throttling element (8) according to the comparison result. According to the control method of the heat pump system, when the four-way valve (3) needs to be reversed, according to the reversing pressure difference of the four-way valve (3) and the current system high and low pressure difference of the heat pump system, the four-way valve (3) and the throttling element (8) are controlled, and therefore problems of low-pressure protection caused by reversing of the four-way valve (3), liquid entrainment of a compressor and the like can be effectively solved, and running reliability of the heat pump system can be improved.

Inventors:
ZHONG, Hailing (West Jinji Road, QianshanZhuhai, Guangdong 0, 519070, CN)
CHENG, Qi (West Jinji Road, QianshanZhuhai, Guangdong 0, 519070, CN)
HUANG, Kailiang (West Jinji Road, QianshanZhuhai, Guangdong 0, 519070, CN)
LIU, Yang (West Jinji Road, QianshanZhuhai, Guangdong 0, 519070, CN)
LIU, Siyuan (West Jinji Road, QianshanZhuhai, Guangdong 0, 519070, CN)
LI, Min (West Jinji Road, QianshanZhuhai, Guangdong 0, 519070, CN)
WANG, Puzhong (West Jinji Road, QianshanZhuhai, Guangdong 0, 519070, CN)
Application Number:
CN2018/098221
Publication Date:
February 07, 2019
Filing Date:
August 02, 2018
Export Citation:
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Assignee:
GREE ELECTRIC APPLIANCES (WUHAN) CO., LTD (No. 888, Dongfeng AvenueEconomic & Technology Development Zon, Wuhan Hubei 6, 430056, CN)
GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI (West Jinji Road, QianshanZhuhai, Guangdong 0, 519070, CN)
International Classes:
F25B49/02; F25B13/00; F25B41/04; F25B41/06
Foreign References:
CN107388663A2017-11-24
CN104896809A2015-09-09
CN104676997A2015-06-03
CN103388945A2013-11-13
CN1318723A2001-10-24
CN106440558A2017-02-22
KR20080001308A2008-01-03
JP6147173B22017-06-14
Attorney, Agent or Firm:
BEIJING XURUN LAW FIRM (Room B-1605, Caizhi International BuildingNo. 18 Zhongguancun East Road, Haidian District, Beijing 3, 100083, CN)
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