Patent ID: 11898571
Assignee: TRANE INTERNATIONAL INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 14:
15. A method of lubricating a compressor in a heat transfer circuit, the compressor configured to compress a first working fluid including a refrigerant, the method comprising:
heating, with a lubricant heater of a lubricant refrigeration system, lubricant discharged from one or more bearings of the compressor to increase a temperature of the lubricant in a lubricant tank to be at or above a predetermined minimum temperature, the lubricant refrigeration system including, the lubricant heater, a lubricant cooler, and a second working fluid including a refrigerant;
directing the lubricant from the lubricant tank through a lubricant pathway to one or more bearings of the compressor; and
cooling, with the lubricant cooler of the lubricant refrigeration system, the lubricant passing through the lubricant pathway with the second working fluid.