AIR CONDITIONER AND DEFROSTING METHOD FOR OUTDOOR UNIT THEREOF

WIPO Patent Application WO/2018/233457

A1

An air conditioner and a defrosting method for an outdoor unit thereof. After an air conditioner enters an outdoor unit defrosting mode, a throttling device (500) is controlled to reduce the flow rate of a refrigerant at an outlet of an outdoor unit heat exchanger (200), and the heat exchange amount of the outdoor unit is reduced. In this way, the exhaust temperature of a compressor (100) would rise quickly, so that the temperature of the refrigerant reaching a condenser is relatively high. Thus, the defrosting speed and the defrosting effect are improved. In addition, the compressor (100) has a shutdown protection function; when the index temperature is too high, it means that the exhaust temperature of the compressor (100) is too high, and the compressor (100) would be automatically shut down to prevent the air conditioner from failing. Therefore, according to the method of the present invention, when the index temperature is above a first preset temperature, the flow rate at the refrigerant outlet of the outdoor unit heat exchanger (200) would be increased to appropriately reduce the exhaust temperature of the compressor (100), thereby preventing the compressor (100) from being shut down and the defrosting process from being interrupted.

YANG ZHONGFENG (CN)
WANG YANSHENG (CN)
ZENG FUXIANG (CN)
LIU CHAOCHAO (CN)

PCT/CN2018/088849

December 27, 2018

May 29, 2018

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QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD (CN)

F24F11/41; F25B47/02

KR20100036786A	2010-04-08
CN107726536A	2018-02-23
JPS61175430A	1986-08-07
JPH11257719A	1999-09-24
CN1482015A	2004-03-17

WISEAST INTELLECTUAL PROPERTY LAW FIRM (CN)

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