Patent ID: 9528037
Filing Date: 2016-12-27
CPC Classification: C09K,C10M,C10N,F25B

Claim Text:
1. A vapor compression system comprising: a condenser having an inlet side and an outlet side; a compressor having an inlet side and an outlet side; an evaporator having an inlet side and an outlet side; an expansion valve having an inlet side and an outlet side; a circulation loop placing each of the condenser, compressor, evaporator, and expansion valve into fluid communication; and a heat transfer fluid comprising a refrigerant-rich portion and a lubricant-rich portion, wherein a relative difference between the densities of the portions is less than 20%, and wherein at a temperature below a phase inversion temperature of the heat transfer fluid the refrigerant-rich portion and the lubricant-rich portion are immiscible and one of the refrigerant-rich portion and lubricant-rich portion is more dense and at a temperature above the phase inversion temperature the refrigerant-rich portion and the lubricant-rich portion are immiscible and the other of the refrigerant-rich portion and the lubricant-rich portion is more dense.