COOLING MEDIUM FOR COOLING MEDIUM CYCLING APPARATUS AND COOLING MEDIUM CYCLING APPARATUS USING THE SAME

摘要

PROBLEM TO BE SOLVED: To easily perform an airtightness test in a product state even if carbon dioxide is used as a cooling medium of a cooling medium cycling apparatus.;SOLUTION: The cooling medium containing carbon dioxide and helium is used as the cooling medium for the cooling medium cycling apparatus. This cooling medium for the cooling medium cycling apparatus contains helium in an amount of 1-10 vol.% with respect to carbon dioxide. This cooling medium is enclosed in the heat pump unit 150 of a heat pump hot water supply machine 160 as the cooling medium cycling apparatus equipped with a rotary compressor 10.;COPYRIGHT: (C)2004,JPO