Refrigeration working fluid compositions for use in...

C - Chemistry – Metallurgy – 09 – K

Patent

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C09K 5/04 (2006.01) C10M 105/38 (2006.01) C10M 171/00 (2006.01) F25D 17/02 (2006.01)

Patent

CA 2181387

A refrigeration working fluid composition which is miscible or partially miscible at temperatures of less than 120°C and which is immiscible at temperatures of at least about 120-180°C, the refrigeration working fluid comprising: (i) about 65 to 95 weight % of a refrigerant, based on the total weight of the working fluid composition, the refrigerant comprising a blend of pentafluoroethane, 1,1,1-trifluoroethane, and 1,1,1,2- tetrafluoroethane, wherein the tetrafluoroethane is present in an amount of between about 0.5 to 10 weight %, based on the total weight of the refrigerant, and (ii) about 5 to 35 weight % of a polyol ester lubricant, based on the total weight of the working fluid composition.

La présente invention concerne une composition de fluide thermodynamique de réfrigération qui est totalement ou partiellement miscible à des températures inférieures à 120 DEG C et qui n'est pas miscible à des températures se situant au moins aux environs de 120 à 180 DEG C. Ce fluide thermodynamique de réfrigération est constitué (i) d'un réfrigérant pour environ 65 à 95 % de la masse totale de la composition de fluide thermodynamique de réfrigération, le réfrigérant comprenant un mélange de pentafluoroéthane, 1,1,1-trifluoroéthane et 1,1,1,2-tétrafluoroéthane, le tétrafluoroéthane représentant 0,5 à 10 % de la masse totale du réfrigérant, et (ii) d'ester de polyol comme lubrifiant pour environ 3 à 35 % de la masse totale de la composition de fluide thermodynamique de réfrigération.

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