Scroll compressor

• US 20070092390A1
• Filed: 10/26/2005
• Published: 04/26/2007
• Est. Priority Date: 10/26/2005
• Status: Abandoned Application

• Current Assignee: Emerson Climate Technologies Incorporated (Emerson Electric Company)
• Original Assignee: Copeland Corporation LLC (Emerson Electric Company)
• Inventors: Ignatiev, Kirill, Akei, Masao, Fogt, James
• Application Number:
  US11/259,237
• Publication Number:
  US 20070092390A1
• Time in Patent Office: Days
• US Class Current: 418/55.5
• CPC Class Codes: F04C 18/0215 where only one member is moving
• CPC Class Codes: F04C 18/0253 Details concerning the base
• CPC Class Codes: F04C 18/0261 Details of the ports, e.g. location, number, geometry
• CPC Class Codes: F04C 2240/50 Bearings
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 27/005 Axial sealings for working fluid
• CPC Class Codes: F04C 29/0007 Injection of a fluid in the working chamber for sealing, cooling and lubricating sealing only F04C27/00; lubrication only F04C29/02; cooling F02B47/02, F02D21/00, F02M25/00
• CPC Class Codes: F04C 29/02 Lubrication of machines or engines in general F01M; Lubricant separation separation in general B01D
• CPC Class Codes: Y10S 418/01 Non-working fluid separation

Abstract

A scroll compressor has a fluid pressure biasing system for both the orbiting scroll member and the non-orbiting scroll member. The biasing system can utilize a pressurized gas from the pocket of the scroll compressor or it can utilize an external pressurized oil source. In an additional embodiment, a hydrostatic bearing is located between the orbiting scroll member and the non-orbiting scroll member.

Claims

1. A scroll compressor comprising:

a first scroll member having a first spiral wrap projecting outwardly from a first end cap;

a second scroll member having a second spiral wrap projecting outwardly from a second end cap, said second spiral wrap being intermeshed with said first spiral wrap;

a drive member for causing said scroll members to orbit relative to one another whereby said spiral wraps will create pockets of progressively changing volume between a suction pressure zone and a discharge pressure zone;

a first biasing chamber disposed adjacent said first scroll member;

means for supplying a pressurized fluid to said biasing chamber, said pressurized fluid biasing said first scroll member towards said second scroll member; and

means for varying the pressure of said pressurized fluid.

2. The first scroll member according to claim 1, wherein said supplying means comprises a first passage extending between said first biasing chamber and one of said pockets.

3. The first scroll member according to claim 2, wherein said varying means comprises a second passage extending between said first biasing chamber and said suction pressure zone.

4. The first scroll member according to claim 3, further comprising means for opening and closing said second passage.

5. The first scroll member according to claim 3, wherein said second passage is opened and closed by orbiting motion of said first scroll member.

6. The first scroll member according to claim 3, wherein said second passage comprises a through passage extending through said first end plate and a recess extending into said second end plate.

7. The first scroll member according to claim 6, wherein said second passage is opened and closed by orbiting motion of said first scroll member.

8. The first scroll member according to claim 1, wherein said varying means comprises a second passage extending between said first biasing chamber and said suction pressure zone.

9. The first scroll member according to claim 8, further comprising means for opening and closing said second passage.

10. The first scroll member according to claim 8, wherein said second passage is opened and closed by orbiting motion of said first scroll member.

11. The first scroll member according to claim 8, wherein said second passage comprises a through passage extending through said first end plate and a recess extending into said second end plate.

12. The first scroll member according to claim 11, wherein said second passage is opened and closed by orbiting motion of said first scroll member.

13. The first scroll member according to claim 1, further comprising a shell, said shell and said second scroll member defining a second biasing chamber, said second biasing chamber being supplied with a pressurized fluid.

14. The first scroll member according to claim 13, further comprising a third passage extending between said second biasing chamber and one of said pockets.

15. The first scroll member according to claim 13, wherein said supplying means comprises a first passage extending between said first biasing chamber and one of said pockets.

16. The first scroll member according to claim 15, wherein said varying means comprises a second passage extending between said first biasing chamber and said suction pressure zone.

17. The first scroll member according to claim 16, further comprising means for opening and closing said second passage.

18. The first scroll member according to claim 16, wherein said second passage is opened and closed by orbiting motion of said first scroll member.

19. The first scroll member according to claim 16, wherein said second passage comprises a through passage extending through said first end plate and a recess extending into said second end plate.

20. The first scroll member according to claim 19, wherein said second passage is opened and closed by orbiting motion of said first scroll member.

21. The first scroll member according to claim 13, wherein said varying means comprises a second passage extending between said first biasing chamber and said suction pressure zone.

22. The first scroll member according to claim 21, further comprising means for opening and closing said second passage.

23. The first scroll member according to claim 21, wherein said second passage is opened and closed by orbiting motion of said first scroll member.

24. The first scroll member according to claim 21, wherein said second passage comprises a through passage extending through said first end plate and a recess extending into said second end plate.

25. The first scroll member according to claim 24, wherein said second passage is opened and closed by orbiting motion of said first scroll member.