SCROLL COMPRESSOR

• US 20120258004A1
• Filed: 06/20/2012
• Published: 10/11/2012
• Est. Priority Date: 10/26/2005
• Status: Active Grant

• Current Assignee: Copeland Corporation LLC (Emerson Electric Company)
• Original Assignee: James F. Fogt, Kirill M. Ignatiev, Masao Akei
• Inventors: Ignatiev, Kirill M., Fogt, James F., Akei, Masao
• Granted Patent: US 8,764,423 B2
• Time in Patent Office: Days
• US Class Current: 418/55.2
• 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 compressor may include a shell assembly, a first scroll member located within the shell assembly and including a first end plate and a first spiral wrap extending from the first end plate, and a second scroll member located within the shell assembly, supported for orbital movement relative to the first scroll member and including a second end plate and a second spiral wrap extending from the second end plate and meshingly engaged with the first spiral wrap to form compression pockets. The first scroll member may define a fluid injection port and the second scroll member may define a passage in communication with the fluid injection port and at least one of the compression pockets to provide pressurized vapor from the fluid injection port to the at least one of the compression pockets.

Claims

1. A compressor comprising:

a shell assembly;

a first scroll member located within said shell assembly and including a first end plate and a first spiral wrap extending from said first end plate; and

a second scroll member located within said shell assembly, supported for orbital movement relative to said first scroll member and including a second end plate and a second spiral wrap extending from said second end plate and meshingly engaged with said first spiral wrap to form compression pockets, said first scroll member defining a fluid injection port and said second scroll member defining a passage in communication with said fluid injection port and at least one of said compression pockets to provide pressurized vapor from said fluid injection port to said at least one of said compression pockets.

2. The compressor of claim 1, further comprising a drive shaft engaged with said second scroll member, said fluid injection port extends through said first end plate and said passage extends through said second end plate and is intermittently in communication with said fluid injection port.

3. The compressor of claim 2, wherein initial communication between said fluid injection port and said passage occurs just after an outermost one of said compression pockets is formed by being sealed off from a suction pressure region of said shell assembly.

4. The compressor of claim 3, wherein communication between said fluid injection port and said passage is terminated after ninety degrees of rotation of said drive shaft after the initial communication between said fluid injection port and said passage occurs.

5. The compressor of claim 2, wherein communication between said fluid injection port and said passage is terminated after ninety degrees of rotation of said drive shaft after an outermost one of said compression pockets is formed by being sealed off from a suction pressure region of said shell assembly.

6. The compressor of claim 2, wherein said first scroll member is axially fixed relative to said shell assembly and said second scroll member is axially displaceable relative to said shell assembly and said first scroll member.

7. The compressor of claim 1, wherein said passage includes a first axial passage extending partially through said second end plate and in communication with said fluid injection port, a radial passage extending from said first axial passage through said second end plate and a second axial passage extending from said radial passage and in communication with said at least one of said compression pockets.

8. The compressor of claim 7, further comprising a third axial passage extending from said radial passage and in communication with another one of said compression pockets.

9. The compressor of claim 1, further comprising a vapor injection system including a pressurized vapor source in communication with said fluid injection port.

10. The compressor of claim 9, wherein said shell assembly includes an end cap and said vapor injection system includes a fluid line extending through said end cap and providing said pressurized vapor source to said fluid injection port.

11. The compressor of claim 9, further comprising a drive shaft engaged with said second scroll member, said fluid injection port extends through said first end plate and said passage extends through said second end plate and is intermittently in communication with said fluid injection port.

12. The compressor of claim 11, wherein initial communication between said fluid injection port and said passage occurs just after an outermost one of said compression pockets is formed by being sealed off from a suction pressure region of said shell assembly.

13. The compressor of claim 12, wherein communication between said fluid injection port and said passage is terminated after ninety degrees of rotation of said drive shaft after the initial communication between said fluid injection port and said passage occurs.

14. The compressor of claim 11, wherein communication between said fluid injection port and said passage is terminated after ninety degrees of rotation of said drive shaft after an outermost one of said compression pockets is formed by being sealed off from a suction pressure region of said shell assembly.

15. The compressor of claim 11, wherein said first scroll member is axially fixed relative to said shell assembly and said second scroll member is axially displaceable relative to said shell assembly and said first scroll member.