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Title:
CO2 HEAT PUMP SYSTEM AND DEFROSTING CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/018314
Kind Code:
A1
Abstract:
Disclosed in the present application are a CO2 heat pump system and a defrosting control method therefor, comprising a CO2 refrigerant circulation path and a water supply circulation path. The CO2 refrigerant circulation path comprises, sequentially connected head to tail, a compressor, a gas cooler, a first throttle apparatus, and an evaporator. The water supply circulation path comprises a water tank and a water path connection pipe assembly. The water path connection pipe assembly comprises a cold water supply pipe, a hot water return pipe, a water path control valve, and a hot water supply pipe. A water inlet of the water tank is in communication with the hot water supply pipe, and a water return inlet of the water tank is in communication with the hot water return pipe. A water inlet of the gas cooler, the cold water supply pipe, the hot water return pipe, and the water path control valve are all connected. The hot water supply pipe is in communication with a water outlet of the gas cooler, and the water path control valve is used to control the water inlet of the gas cooler to be in communication with or cut off from the cold water supply pipe, and control the water inlet of the gas cooler to be in communication with or cut off from the hot water return pipe.

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Inventors:
ZHAO DONGFANG (CN)
GAO YONGKUN (CN)
LIU MIN (CN)
Application Number:
PCT/CN2020/111548
Publication Date:
February 04, 2021
Filing Date:
August 27, 2020
Export Citation:
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Assignee:
QINGDAO HISENSE HITACHI AIR CONDITIONING SYS CO LTD (CN)
International Classes:
F25B47/02
Foreign References:
CN210399609U2020-04-24
CN108592452A2018-09-28
CN108592452A2018-09-28
CN108224774A2018-06-29
CN106152644A2016-11-23
CN201293456Y2009-08-19
CN104864646A2015-08-26
CN101706186A2010-05-12
KR100796452B12008-01-22
US6418737B12002-07-16
CN107477903A2017-12-15
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
Download PDF:
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