Cooler by using carbon dioxide as cooling medium
In the refrigerating device, carbon dioxide is circulated as a refrigerant through a refrigerating circuit in which at least a refrigerant compressor (100), a heat releasing device (120,160), an expansion mechanism (140) and an evaporator (120,160) are connected in an annular arrangement by refriger...
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Zusammenfassung: | In the refrigerating device, carbon dioxide is circulated as a refrigerant through a refrigerating circuit in which at least a refrigerant compressor (100), a heat releasing device (120,160), an expansion mechanism (140) and an evaporator (120,160) are connected in an annular arrangement by refrigerant pipes. The refrigerating device oil used in the compressor has a viscosity at 40 DEG C of 5 to 300 cSt, a volume specific resistivity of at least 10 OMEGA . cm, and a pour point of no higher than -30 DEG 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 (200) for trapping moisture within the refrigerating circuit. |
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