Refrigerating device utilizing carbon dioxide as a refrigerant

Details Refrigerating device utilizing carbon dioxide as a refrigerant Refrigerating device utilizing carbon dioxide as a refrigerant

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 9/00 (2006.01) C09K 5/04 (2006.01) C10M 171/00 (2006.01) C10M 171/02 (2006.01) F25B 1/10 (2006.01) F25B 31/00 (2006.01)

Patent

CA 2317994

A refrigerating device is provided whose burden on the environment is small, and in which a high amount of heat can be removed, and in which return of refrigerating device oil to a compressor is good. In the refrigerating device, carbon dioxide is circulated as a refrigerant through a refrigerating circuit in which at least a refrigerant compressor, a heat releasing device, an expansion mechanism and an evaporator are connected in an annular arrangement by refrigerant pipes. The refrigerating device oil used in the compressor has a viscosity at 40°C of 5 to 300 cSt, a volume specific resistivity of at least 10 8 .OMEGA..cndot. cm, and a pour point of no higher than -30°C when the carbon dioxide is dissolved to saturation. Organic materials which do not physically and/or chemically change due to high-temperature, high-pressure carbon dioxide are used in the refrigerating circuit. The refrigerating circuit is provided with a device for trapping moisture within the refrigerating circuit.

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