Claims
- 1. An electrically-driven closed scroll compressor comprising
- a closed vessel, and
- a compression mechanism accommodated in said closed vessel and comprising:
- a bearing member securely mounted in said closed vessel;
- a stationary scroll having a stationary scroll wrap formed thereon;
- an orbiting scroll mounted between said stationary scroll and said bearing member and having an orbiting end plate and an orbiting scroll wrap formed on said orbiting end plate so as to engage with said stationary scroll wrap to define a plurality of working pockets therebetween; and
- an eccentric bearing for allowing said orbiting scroll to undergo an orbiting motion relative to said stationary scroll;
- an electric motor accommodated in said closed vessel so as to drive said compression mechanism; and
- a generally ring-shaped sealing member mounted on one of said bearing member and said orbiting end plate so as to be held in contact with the other of said bearing member and said orbiting end plate;
- wherein said orbiting end plate has first and second regions defined therein internally and externally of said sealing member, respectively, said first and second regions receiving first and second pressures, respectively, both forming a first thrust force; and
- wherein said orbiting scroll wrap is formed to represent a scroll curve having a center of development positioned on said orbiting end plate so that during the orbiting motion of said orbiting scroll, when a second thrust force applied to said orbiting scroll from said working pockets takes a substantially maximum value, a distance between a central point of application of said first thrust force and a central point of application of said second thrust force takes a substantially minimum value.
- 2. The scroll compressor according to claim 1, wherein the center of said sealing member is radially offset from a center of said orbiting end plate.
- 3. The scroll compressor according to claim 1, wherein the center of said sealing member is radially offset from a center of said orbiting end plate so that the central point of application of said first thrust force is positioned within a circular orbit which the central point of application of said second thrust force draws during the orbiting motion of said orbiting scroll.
- 4. The scroll compressor according to claim 1, wherein the center of said sealing member is radially offset from a center of said bearing member.
- 5. The scroll compressor according to claim 1, wherein said first pressure is equal to a pressure of a high-pressure refrigerant discharged from said compression mechanism, while said second pressure is equal to a pressure of a low-pressure refrigerant introduced into said compression mechanism.
- 6. The scroll compressor according to claim 1, wherein said generally ring-shaped sealing member is mounted on said bearing member.
- 7. The scroll compressor according to claim 6, wherein the center of said sealing member is radially offset from a center of said bearing member.
- 8. The scroll compressor according to claim 6, wherein said first pressure is equal to a pressure of a high-pressure refrigerant discharged from said compression mechanism, while said second pressure is equal to a pressure of a low-pressure refrigerant introduced into said compression mechanism.
- 9. The scroll compressor according to claim 1, wherein said generally ring-shaped sealing member is mounted on said orbiting end plate.
- 10. The scroll compressor according to claim 9, wherein the center of said sealing member is radially offset from a center of said orbiting end plate so that the central point of application of said first thrust force is positioned within a circular orbit which the central point of application of said second thrust force draws during the orbiting motion of said orbiting scroll.
- 11. The scroll compressor according to claim 9, wherein said first pressure is equal to a pressure of a high-pressure refrigerant discharged from said compression mechanism, while said second pressure is equal to a pressure of a low-pressure refrigerant introduced into said compression mechanism.
- 12. The scroll compressor according to claim 9, wherein the center of said sealing member is radially offset from a center of said orbiting end plate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-195838 |
Aug 1994 |
JPX |
|
Parent Case Info
This is a divisional application of Ser. No. 08/515,591, filed Aug. 16, 1995, U.S. Pat. No. 5,630,712.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
3-149382 |
Jun 1991 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
515591 |
Aug 1995 |
|