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US 2011/0079026 A1Published application
Refrigerant
AssigneeEarthcare Products Limited
InventorsNicholas Cox, Victor Mazur, Daniel Colbourne, Andrew Stevenson
Life of this patent
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Abstract
A refrigerant that is azeotropic or near-azeotropic comprises a binary blend of R744 and R41. In one embodiment the binary blend has a molar composition of 20 to 60 percent R744, the remainder being R41.
Claims8
A refrigerant that is azeotropic or near-azeotropic and comprises a binary blend of R744 and R41.
A method of recharging a heat transfer system that includes an existing refrigerant, the method comprising:
- unsealing the heat transfer system to gain access to the existing refrigerant;
- removing substantially all of the existing refrigerant from the heat transfer system;
- at least partly filling the heat transfer system with a refrigerant that is azeotropic or near-azeotropic and comprises a binary blend of R744 and R41;
- wherein said binary blend has a molar composition of 20 to 60 percent R744, and a remainder of said refrigerant is R41;
- and
- resealing the heat transfer system.
3 more elements
Dependencies are inferred from the claim text.