Refrigeration system

F - Mech Eng,Light,Heat,Weapons – 25 – B

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F25B 1/00 (2006.01) C09K 5/04 (2006.01) F04B 35/04 (2006.01) F04B 39/00 (2006.01) F25B 9/00 (2006.01) F25B 13/00 (2006.01) F25B 41/00 (2006.01)

Patent

CA 2402391

A refrigerant circuit is formed by connecting, in the order given, a compressor, a four-way selector valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger by a gas side pipe and a liquid side pipe. The refrigerant circuit is charged with a single refrigerant of R32 or with an R32/R125 mixed refrigerant whose R32 content is not less than 75% by weight. As an insulating material of an electric motor of the compressor, a resin material is used, and as a refrigeration oil, a synthetic oil is used. When cooling rated capacity is not more than 5 kW, the liquid side pipe is formed by use of a pipe whose inside diameter is less than 4.75 mm.

L'invention concerne un réfrigérateur comprenant un circuit de réfrigération (10) réalisé en connectant un compresseur (11), un distributeur progressif à quatre voies (12), un échangeur thermique extérieur (13), une soupape d'expansion (14), et un échangeur thermique intérieur (15), dans cet ordre et par l'intermédiaire de tuyaux de gaz (31) et de tuyaux de liquides (32). A l'intérieur de ce circuit réfrigérant (10), on utilise le réfrigérant R32 ou les réfrigérants mixtes R32/R125 contenant au moins 75 % en poids de R32. Pour le moteur du compresseur (11) on utilise un matériau en résine comme matériau d'isolation. Une huile synthétique est utilisée comme huile de réfrigération. Si la capacité de refroidissement est fixée à 5 kW ou moins, le tuyau de liquide (32) présente un diamètre intérieur inférieur à 4,75 mm.

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