Patent ID: 6644064
Filing Date: 2003-11-11
Classification: C09K

Abstract:
A refrigerating device comprising:(a) a compressor, a heat releasing device, an expansion mechanism, and an evaporator connected to form a refrigeration circuit, and (b) a refrigerant disposed in the refrigeration circuit, wherein the refrigerant comprises: (i) a hydrocarbon having 1 to 4 carbon atoms, or a flammable hydrocarbon fluoride having a structure derived by substituting fluorine atoms for one or more hydrogen atoms of said hydrocarbon, as a main component, and (ii) a tetrahydrothiophene as an odorant, wherein the hydrocarbon or the flammable hydrocarbon fluoride has purity of 99.0 vol % or higher and has a content of unsaturated hydrocarbon no more than 0.01 wt % and an entire sulfur content no more than 0.1 wt ppm.