A MIXED WORKING FLUID FOR HEAT PUMPS

WIPO Patent Application WO/2009/155822

A1

The present invention provides a coolant mixture composed of two or three components. A binary non-azeotropic coolant is composed of 1 to 80 percent by mass of R125 and 20 to 99 percent by mass of R152a. A ternary non-azeotropic coolant is composed of 2 to 50 percent by mass of R125, 15 to 97 percent by mass of R152a and 1 to 35 percent by mass of R143a. The coolant mixture is physically blended at normal temperature in the defined proportion, to obtain the corresponding mixed working fluid. The coolant has an ozone depletion potential (ODP) equal to zero, does not destroy the ozonosphere, can reduce the influence of greenhouse effect and is environmentally friendly. The coolant has appropriate thermal parameters and good cycle performance. The coolant can replace a coolant mixture of dichlorodifluoromethane (CFC12) and dichlorofluoromethane (HCFC22), and can be used in the heat pump systems for that coolant mixture.

WANG GAOYUAN (CN)

PCT/CN2009/072121

December 30, 2009

June 04, 2009

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WANG GAOYUAN (CN)

C09K5/04

JPH08231945A	1996-09-10
JPH03170583A	1991-07-24

HE, MAO-GANG ET AL.: "Testing of the mixing refrigerants HFC152a/HFC125 in domestic refrigerator.", APPLIED THERMAL ENGINEERING, vol. 25, no. ISS8-9, June 2005 (2005-06-01), pages 1169 - 1181
LIU, Z. ET AL.: "Recent Progress on Alternatives to CFC12 and HCFC22 (1)", JOURNAL OF XI'AN JIAOTONG UNIVERSITY, vol. 39, no. 7, July 2005 (2005-07-01), pages 661 - 665

NANJING TIANHUA PATENT AGENT CO., LTD. et al. (Block A1World Trade Center Building,No.67 Shanxi Road,Nanjing, Jiangsu 9, CN)

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