EP0430169A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Working fluid
Assignee: Panasonic Holdings Corp
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Filing: 1990-11-27
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Granted: —
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Expires: 2010-11-27
Abstract
Abstract A working fluid comprising tetrafluoroethane and at least two fluorinated hydrocarbons having a boiling point of not higher than -40°C under atmospheric pressure selected from the group consisting of methane derivatives and ethane derivatives which consist of one or two carbon atoms, hydrogen atoms and fluorine atoms, which has very small influence on the ozone layer in the stratosphere and is suitable as a substitute working fluid for chlorodifluoromethane.
Inventors
- 👤 Yuji Yoshida
- 👤 Koji Arita
- 👤 Masami Funakura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C09K2205/00; C09K2205/22
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
47 words
A working fluid comprising tetrafluoroethane and at least two fluorinated hydrocarbon having a boiling point of not higher than -40°C under atmospheric pressure selected from the group consisting of methane derivatives and ethane derivatives which consist of one or two carbon atoms, hydrogen atoms and fluorine atoms
Claim 2
Dependent Claim
18 words
The working fluid as claimed in claim 1, which comprises 15 to 95 % by weight of tetrafluoroethane.
Claim 3
Dependent Claim
27 words
The working fluid as claimed in claim 1, wherein said at least two fluorinated hydrocarbons are selected from the group consisting of trifluoromethane, difluoromethane, pentafluoroethane and trifluoroethane.
Claim 4
Dependent Claim
67 words
The working fluid as claimed in claim 1, which comprises 15 to 95 % by weight of tetrafluoroethane and at least two fluorinated hydrocarbons selected from the group consisting of not more than 50 % by weight of trifluoromethane, not more than 60 % by weight of difluoromethane, not more than 85 % by weight of pentafluoroethane and not more than 80 % by weight of trifluoroethane.
Claim 5
Dependent Claim
67 words
The working fluid as claimed in claim 1, which comprises 20 to 90 % by weight of tetrafluoroethane and at least two fluorinated hydrocarbons selected from the group consisting of not more than 40 % by weight of trifluoromethane, not more than 50 % by weight of difluoromethane, not more than 80 % by weight of pentafluoroethane and not more than 80 % by weight of trifluoroethane.
Claim 6
Dependent Claim
37 words
The working fluid as claimed in claim 1, which comprises 40 to 95 % by weight of tetrafluoroethane, not more than 50 % by weight of trifluoromethane and not more than 60 % by weight of difluoromethane.
Claim 7
Dependent Claim
37 words
The working fluid as claimed in claim 6, which comprises 50 to 90 % by weight of tetrafluoroethane, not more than 40 % by weight of trifluoromethane and not more than 50 % by weight of difluoromethane.
Claim 8
Dependent Claim
37 words
The working fluid as claimed in claim 1, which comprises 15 to 95 % by weight of tetrafluoroethane, not more than 50 % by weight of trifluoromethane and not more than 85 % by weight of pentafluoroethane.
Claim 9
Dependent Claim
37 words
The working fluid as claimed in claim 8, which comprises 20 to 90 % by weight of tetrafluoroethane, not more than 40 % by weight of trifluoromethane and not more than 80 % by weight of pentafluoroethane.
Claim 10
Dependent Claim
37 words
The working fluid as claimed in claim 1, which comprises 20 to 95 % by weight of tetrafluoroethane, not more than 50 % by weight of trifluoromethane and not more than 80 % by weight of trifluoroethane.
Claim 11
Dependent Claim
37 words
The working fluid as claimed in claim 10, which comprises 20 to 90 % by weight of tetrafluoroethane, not more than 40 % by weight of trifluoromethane and not more than 80 % by weight of trifluoroethane.
Claim 12
Dependent Claim
37 words
The working fluid as claimed in claim 1, which comprises 15 to 80 % by weight of tetrafluoroethane, not more than 60 % by weight of difluoromethane and not more than 85 % by weight of pentafluoroethane.
Claim 13
Dependent Claim
37 words
The working fluid as claimed in claim 13, which comprises 20 to 75 % by weight of tetrafluoroethane, not more than 50 % by weight of difluoromethane and not more than 80 % by weight of pentafluoroethane.
Claim 14
Dependent Claim
37 words
The working fluid as claimed in claim 1, which comprises 20 to 80 % by weight of tetrafluoroethane, not more than 60 % by weight of difluoromethane and not more than 80 % by weight of trifluoroethane.
Claim 15
Dependent Claim
37 words
The working fluid as claimed in claim 14, which comprises 20 to 75 % by weight of tetrafluoroethane, not more than 50 % by weight of difluoromethane and not more than 80 % by weight of trifluoroethane.
Claim 16
Dependent Claim
37 words
The working fluid as claimed in claim 1, which comprises 15 to 45 % by weight of tetrafluoroethane, not more than 85 % by weight of pentafluoroethane and not more than 80 % by weight of trifluoroethane.
Claim 17
Dependent Claim
37 words
The working fluid as claimed in claim 16, which comprises 20 to 45 % by weight of tetrafluoroethane, not more than 80 % by weight of pentafluoroethane and not more than 80 % by weight of trifluoroethane.
References Cited (Backward Citations)
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