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Title:
A HEAT PUMP SYSTEM FOR AIR CONDITIONING UNDER A LOW TEMPERATURE AND A USING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2007/059709
Kind Code:
A1
Abstract:
A heat pump system for air conditioning under a low temperature (100) and a method for decreasing fluctuation of temperature conditioning using the same are disclosed. The heat pump system (100) for air conditioning under a low temperature comprises a compressor (11), a four-way valve (16), an outdoor heat exchanger (17), an outdoor electronic expansion valve (18), a liquid reservoir (12), an electronic expansion valve (13) and an indoor heat exchanger (22). The liquid reservoir (12) is connected to the gas supplementing port of the compressor (11) through a pipe provided with an electromagnetic valve (14) for supplementing saturated refrigerant gas under a middle pressure to the compressor (11). When the outdoor temperature is lower than zero degree, the electromagnetic valve (14) is opened, and the open degree of the electronic expansion valve (13) is controlled according to the temperature between the liquid reservoir (12) and the electronic expansion valve (13) and the temperature between the electromagnetic valve (14) and the compressor (11). Then saturated refrigerant gas under a suitable middle pressure is supplemented to the compressor (11).

Inventors:
SU YUHAI (CN)
LIU GUIPING (CN)
SUN CHANGQUAN (CN)
Application Number:
PCT/CN2006/003165
Publication Date:
May 31, 2007
Filing Date:
November 24, 2006
Export Citation:
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Assignee:
GREE ELECTRIC APPLIANCES INC (CN)
SU YUHAI (CN)
LIU GUIPING (CN)
SUN CHANGQUAN (CN)
International Classes:
F25B30/02; F24F1/00; F24F11/02; F25B1/10
Foreign References:
JP2003042585A2003-02-13
CN1793755A2006-06-28
JP2001116376A2001-04-27
CN1637351A2005-07-13
Attorney, Agent or Firm:
SHENZHEN STANDARD PATENT & TRADEMARK AGENT LTD. (Yinzuo Int'l Building No. 1056 Shennan Boulevar, Shenzhen Guangdong 0, CN)
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