Compressor lubrication supply system and compressor thereof

Patent metadata

Field	Value
Publication number	US-12209592-B2
Application number	US-202418439032-A
Country	US
Kind code	B2
Filing date	Feb 12, 2024
Priority date	Dec 30, 2021
Publication date	Jan 28, 2025
Grant date	Jan 28, 2025

Abstract

A lubricant supply system is for a compressor that compresses a first working fluid in a heat transfer circuit. The lubricant supply system includes a lubricant tank, a lubricant pathway for supplying lubricant from the lubricant tank to one or more bearings of the compressor, and a lubricant refrigeration system with a lubricant heater and a lubricant cooler. The lubricant heater configured to heat the lubricant discharged from the one or more bearings and the lubricant cooler configured to cool the lubricant flowing through the lubricant pathway. A method of lubricating a compressor includes heating the lubricant, directing the lubricant from a lubricant tank through a lubricant pathway to one or more bearings of the compressor, and cooling the lubricant passing through the lubricant pathway.

First claim

What is claimed is:

1. A lubricant separator for a heat transfer circuit, comprising:
a housing including a first inlet, a first outlet, and a second outlet, the first inlet configured to receive a mixture of lubricant and refrigerant that includes gaseous refrigerant, liquid lubricant, and gaseous refrigerant dissolved in the liquid lubricant;
a lubricant heater configured to heat the liquid lubricant within the lubricant separator to liberate the gaseous refrigerant dissolved in the liquid lubricant; and
a flow director disposed within the housing, the flow director configured to direct:
the gaseous refrigerant from the first inlet to flow around the flow director to the first outlet,
the liquid lubricant through the lubricant heater to the second outlet, and
the gaseous refrigerant liberated from the liquid lubricant to the first outlet.

2. The lubricant separator of claim 1 , wherein the flow director blocks a path from the first inlet to the second outlet.

3. The lubricant separator of claim 1 , wherein the flow director blocks a path from the first inlet to the first outlet.

4. The lubricant separator of claim 1 , wherein the second outlet extends into the flow director, the second outlet having an opening disposed within the flow director.

5. The lubricant separator of claim 1 , wherein the lubricant heater is disposed within the flow director.

6. The lubricant separator of claim 1 , wherein the flow director has a tubular shape.

7. The lubricant separator of claim 1 , wherein the flow director forms:
a first channel disposed between the flow director and the housing, and
a second channel disposed between the flow director and the second outlet.

8. The lubricant separator of claim 7 , wherein the first channel and the second channel extend in opposite directions.

9. The lubricant separator of claim 7 , wherein the first channel and the second channel are configured to direct the liquid lubricant from the first inlet to the second outlet.

10. The lubricant separator of claim 7 , wherein the first channel and the second channel are disposed on opposite sides of the flow director.

11. The lubricant separator of claim 7 , wherein the first channel and the second channel each have a respective annular shape.

12. The lubricant separator of claim 7 , wherein the lubricant heater is disposed in the second channel.

13. A lubricant supply system for a compressor in a heat transfer circuit, the lubricant supply system comprising:
a lubricant separator configured to receive a mixture of lubricant and refrigerant from the compressor, the mixture of lubricant and refrigerant including gaseous refrigerant, liquid lubricant, and gaseous refrigerant dissolved in the liquid lubricant, the lubricant separator including:
a housing including a first inlet, a first outlet, and a second outlet, the first inlet configured to receive the mixture of lubricant and refrigerant from the compressor,
a lubricant heater configured to heat the liquid lubricant within the lubricant separator to liberate the gaseous refrigerant dissolved in the liquid lubricant, and
a flow director disposed within the housing, the flow director configured to direct:
the gaseous refrigerant from the first inlet to flow around the flow director to the first outlet,
the liquid lubricant through the lubricant heater to the second outlet, and
the gaseous refrigerant liberated from the liquid lubricant to the first outlet.

14. The lubricant supply system of claim 13 , wherein the flow director blocks a path from the first inlet to the first outlet and blocks a path from the first inlet to the second outlet.

15. The lubricant supply system of claim 13 , wherein the second outlet extends into the flow director, the second outlet having an opening disposed within the flow director.

16. The lubricant supply system of claim 13 , wherein the lubricant heater is disposed within the flow director.

17. The lubricant supply system of claim 13 , wherein the flow director has a tubular shape.

18. The lubricant supply system of claim 13 , wherein the mixture of lubricant and refrigerant is discharged from one or more bearings of the compressor.

19. The lubricant supply system of claim 13 , further comprising:
a lubricant tank configured to receive the liquid lubricant from the lubricant separator;
a lubricant pathway connected to the lubricant tank and configured to supply the liquid lubricant from the lubricant tank to one or more bearings of the compressor; and
a lubricant refrigeration system including the lubricant heater and a lubricant cooler configured to cool the lubricant flowing through the lubricant pathway.

20. The lubricant supply system of claim 19 , wherein the second outlet is configured to discharge the liquid lubricant, after being heated by the lubricant heater within the lubricant separator, to the lubricant tank.

Assignees

• Trane Int Inc

Inventors

• Harrison Mark W
• Pitts Steven J
• Smith Todd W

Classifications

• F25B31/008

  by injecting a liquid · CPC title

• F25B31/004

  oil recirculating arrangements · CPC title

• F16N39/04

  by heating (heat-exchangers in general F28) · CPC title

• F16N39/02

  by cooling (heat-exchangers in general F28) · CPC title

• F25B31/002

  Lubrication · CPC title