In one embodiment, a compressor assembly is provided. The compressor assembly includes a compressor having an inlet, an outlet, and at least one bearing, the compressor configured to compress a first refrigerant. The assembly further includes a lubrication supply conduit fluidly coupled to the compressor and configured to supply a lubricant to the at least one bearing. The lubricant is a second refrigerant.

Provided is a lubricating oil composition for a refrigerator which uses a base oil including as the main component at least one kind of oxygen-containing compounds selected from polyoxyalkylene glycols, polyvinyl ethers, copolymers of poly(oxy)alkylene glycols or monoethers thereof and polyvinyl ethers, polyol esters, and polycarbonates. The lubricating oil composition for a refrigerator is used for a refrigerator that uses, as a refrigerant, a fluorine-containing organic compound, which is a refrigerant applicable to current car air conditioner systems or the like and has a specific polar structure, and has favorable sealing property, a low coefficient of friction factor in a sliding part, and excellent stability as well as excellent compatibility with the refrigerant.

Provided herein are compositions comprising at least one estolide compound of formula:

##STR00001##

in which n is an integer equal to or greater than 0; m is an integer equal to or greater than 1; R.sub.1, independently for each occurrence, is selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; R.sub.2 is selected from hydrogen and optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; and R.sub.3 and R.sub.4, independently for each occurrence, are selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched. Also provided are uses of the compositions described herein.

A composition including at least one lubricant including polyol esters and a refrigerant fluid F including 1-chloro-3,3,3-trifluoropropene. Also, a composition including at least one lubricant based on polyol esters and a refrigerant fluid F including 1-chloro-3,3,3-trifluoropropene and at least one C3 to C6 alkene stabilizing compound including a single double bond. Also, different uses of the compositions.

Provided is a lubricating oil composition for a refrigerator which uses a base oil including as the main component at least one kind of oxygen-containing compounds selected from polyoxyalkylene glycols, polyvinyl ethers, copolymers of poly(oxy)alkylene glycols or monoethers thereof and polyvinyl ethers, polyol esters, and polycarbonates. The lubricating oil composition for a refrigerator is used for a refrigerator that uses, as a refrigerant, a fluorine-containing organic compound, which is a refrigerant applicable to current car air conditioner systems or the like and has a specific polar structure, and has favorable sealing property, a low coefficient of friction factor in a sliding part, and excellent stability as well as excellent compatibility with the refrigerant.

The present invention relates to non-flammable compositions comprising chlorotrifluoropropene with reduced risk of flammability which are useful as refrigerants, heat transfer fluids, solvents, cleaners, blowing agents, aerosols, extraction fluids, and the like.

The problem to be solved by the present invention is to provide a novel mixed refrigerant that can be an alternative for HCFC-123, has a low ODP and a low GWP, has a COP equal to that of HCFC-123, and has a refrigerating capacity and gas density higher than those of single refrigerants, such as HCFO-1233zd(E) and HFC-245fa, which are being considered as alternative refrigerants for HCFC-123. A composition comprising a refrigerant, wherein the refrigerant comprises HCFO-1233zd(E) and HFC-245fa, and has a mass ratio of HCFO-1233zd(E) to HFC-245fa of 18:82 to 49:51 is provided as a means for solving the above problem.

The invention provides a refrigerating machine oil comprising a hydrocarbon-based base oil, the refrigerating machine oil having a viscosity index of 120 or less, and being used with a 1-chloro-3,3,3-trifluoropropene refrigerant.

Provided herein are compositions comprising at least one estolide compound of formula: ##STR00001##
in which n is an integer equal to or greater than 0; m is an integer equal to or greater than 1; R.sub.1, independently for each occurrence, is selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; R.sub.2 is selected from hydrogen and optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; and R.sub.3 and R.sub.4, independently for each occurrence, are selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched. Also provided are uses of the compositions described herein.

The present invention provides a refrigerating machine oil comprising, as a base oil, at least one oxygen-containing oil having a carbon/oxygen molar ratio of 2.5 or more and 7.5 or less, and the refrigerating machine oil being used with a 1-chloro-2,3,3,3-tetrafluoropropene refrigerant.