IP Library › Granted Patent US 8,496,845
Granted Patent B2
US 8,496,845 · App. 13/001,847 · Granted Jul 30, 2013

Refrigerant composition comprising difluoromethane (HFC32), pentafluoroethane (HFC125) and 2, 3, 3, 3-tetrafluoropropene (HFO1234yf)

Inventors: Tatsumi Tsuchiya (Settsu, JP); Katsuki Fujiwara (Settsu, JP); Masahiro Noguchi (Osaka, JP); Yasufu Yamada (Settsu, JP)
Assignee: Daikin Industries, Ltd.
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Quick Facts
Patent No.
US 8,496,845
App. No.
13/001,847
Granted
Jul 30, 2013
Kind
B2
Abstract

The present invention provides a refrigerant composition that is nonflammable, and ensures low LCCP and less burden on the environment. More specifically, the present invention relates a refrigerant composition containing difluoromethane (HFC32), pentafluoroethane (HFC125), and 2,3,3,3-tetrafluoropropene (HFO1234yf), the ratio of HFC32/HFC125/HFO1234yf being in a range surrounded by points (0/21/79 mass %), (16.6/25.3/58.1 mass %), and (0/28.4/71.6 mass %) in a ternary diagram of a refrigerant composition containing HFC32, HFC125, and HFO1234yf, and the composition essentially containing HFC32.

Claims (9)

1. A composition comprising refrigerants, wherein the refrigerants are difluoromethane (HFC32), pentafluoroethane (HFC125), and 2,3,3,3-tetrafluoropropene (HFO1234yf),

the ratio of HFC32/HFC125/HFO1234yf is in a range surrounded by points (3/22/75 mass %), (15/25/60 mass %), and (3/27/70 mass %) in a ternary diagram of a refrigerant composition containing HFC32, HFC125, and HFO1234yf, and wherein the composition is non-flammable.

2. The composition according to claim 1 , wherein the ratio of HFC32/HFC125/HFO1234yf is in a range surrounded by points (5/24/71 mass %), (3/24/73 mass %), (3/22/75 mass %), and (3/22/73 mass %) in the ternary diagram.

3. The composition according to claim 1 , further comprising a polymerization inhibitor.

4. The composition according to claim 1 , further comprising a drying agent.

5. The composition according to claim 1 , further comprising a stabilizer.

6. A method of operating a refrigerator, comprising circulating the composition according to claim 1 via a compressor.

7. A method of producing the composition according to claim 1 , comprising mixing difluoromethane (HFC32), pentafluoroethane (HFC125), and 2,3,3,3-tetrafluoropropene (HFO1234yf) so that the ratio of HFC32/HFC125/HFO1234yf is in a range surrounded by points (3/22/75 mass %), (15/25/60 mass %), and (3/27/70 mass %) in a ternary diagram of a refrigerant composition containing HFC32, HFC125, and HFO1234yf.

8. A refrigerator comprising the composition according to claim 1 .

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 5, 2011
From: TSUCHIYA, TATSUMI; FUJIWARA, KATSUKI; NOGUCHI, MASAHIRO; YAMADA, YASUFU
To: DAIKIN INDUSTRIES, LTD.
Reel/Frame 025588/0412 →
Continuity (3)
Provisional Application 61129499 · Jul 1, 2008
Provisional Application 61112901 · Nov 10, 2008
Related Publication 20110108756A1 · May 12, 2011