Libricant and media for coolant compressed refrigeration circulator

Abstract

To obtain a lubricating oil for a refrigerant compression type refrigerating cycle apparatus, which has proper compatibility with and solubility in a 2-4C hydrocarbon refrigerant having no halogen atom, keeps viscosity not to impair lubricating properties, reduces the amount of the refrigerant filled and has excellent lubricating properties, stability, etc., and a working fluid. In the lubricating oil for refrigerant compression type refrigerating cycle apparatus with which the 2-4C hydrocarbon refrigerant containing no halogen atom is used, the lubricating oil comprises an ether compound represented by general formula R1-A-OR2(R1and R2are each a 1-4C alkyl group; A is a polymerization chain consisting of m oxyethylene groups and n oxypropylene groups; m is an integer of 0-50; n is an integer of 2-50; m / n is <=1) as a main component and has 10-100 mm2 / s viscosity at 40[deg.]C. The working fluid for the refrigerant compression type refrigerating cycle apparatus comprises the 2-4C hydrocarbon refrigerant containing no halogen atom and the lubricating oil.

Description

technical field [0001] The invention relates to a lubricating oil and a working medium for cooling medium compression refrigeration cycle devices using hydrocarbons with 2 to 4 carbon atoms that do not contain halogen atoms, such as ethane, propane, butane, isobutane and other cooling mediums. Background technique [0002] Conventionally, in refrigeration medium compression refrigeration cycle devices used in refrigerators, air conditioners, refrigerators, etc., as the cooling medium, Freon, such as chlorofluorocarbon (CFC) R-11 ( Freon such as trichlorofluoromethane), R-12 (dichlorodifluoromethane), hydrochlorofluorocarbon (HCFC) R-22 (monochlorodifluoromethane), etc., but due to the recent ozone layer depletion problem , Internationally restrict its production and use, now, switch to chlorine-free, for example, new hydrogen-containing freon cooling products such as difluoromethane (R-32), tetrafluoroethane (R-134 or R-134a) medium. However, although these HFCs do not des...

AI Technical Summary

Problems solved by technology

[0004] However, since the hydrocarbon cooling medium that does not contain halogen atoms has a high solubility with respect to lubricants such as mineral oil, if the above-mentioned lubricant is used, the viscosity of the lubricant will decrease, the lubricity cannot be ensured, and the filling amount of the cooling medium needs to be increased.