US4091638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system for hermetic compressor
Assignee: York International Corp
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Filing: 1976-12-13
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Granted: 1978-05-30
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Expires: 1996-12-13
Abstract
Abstract A hermetic rotary refrigerant compressor is provided with means for handling the oil and refrigerant vapor mixture to provide sufficient cooling of the motor without external precoolers and related conduits and apparatus. In a preferred embodiment, the oil is collected and caused to flow along a portion of the internal surface of the hermetic shell in such a way that the shell itself functions as a heat exchanger. The heat is transferred through the shell to the cooler ambient air in contact with the external surface thereof.
Inventors
- 👤 George Charles Mitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:29
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/04; F04C29/02; F04C29/023; F25; F25B; F25B31/00; F25B31/006; F25B31/02; F25B31/026; Y; Y10; Y10S; Y10S417/00; Y10S417/902; Y10S418/00; Y10S418/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
142 words
A rotary hermetic refrigerant compressor comprising: a rotary, sliding vane refrigerant compressing unit having an inlet and an outlet; a motor operatively connected to drive said compressing unit; a hermetic shell enclosing said compressing unit and said motor; means defining a lubricant sump in the lower portion of said shell; means defining an annular lubricant-refrigerant separator chamber adjacent the outlet of said refrigerant compressing unit, the outer boundary of said chamber being defined by a portion of the inside wall of said shell such that separated lubricant is directed into contact with said inside wall and flows downwardly thereover to said lubricant sump, so that heat is abstracted from said lubricant through said shell wall and rejected to the outside of said shell; and means for directing lubricant from said sump to said motor and compressing unit for lubricating and cooling purposes.
Claim 2
Dependent Claim
142 words
A rotary hermetic refrigerant compressor comprising: a rotary, sliding vane refrigerant compressing unit having an inlet and an outlet; a motor operatively connected to drive said compressing unit; a hermetic shell enclosing said compressing unit and said motor; means defining a lubricant sump in the lower portion of said shell; means defining an annular lubricant-refrigerant separator chamber adjacent the outlet of said refrigerant compressing unit, the outer boundary of said chamber being defined by a portion of the inside wall of said shell such that separated lubricant is directed into contact with said inside wall and flows downwardly thereover to said lubricant sump, so that heat is abstracted from said lubricant through said shell wall and rejected to the outside of said shell; and means for directing lubricant from said sump to said motor and compressing unit for lubricating and cooling purposes.
Claim 3
Dependent Claim
33 words
Apparatus as defined in claim 1 including a porous separator element in said inlet lubricant refrigerant separator chamber, said separator element having a surface in contact with the inside wall of said shell.
Claim 4
Dependent Claim
34 words
Apparatus as defined in claim 2 including a secondary separator positioned in the upper portion of said shell and providing a passage between said compressing unit outlet and the exterior of said hermetic shell.
Claim 5
Dependent Claim
38 words
Apparatus as defined in claim 1 wherein said compressing unit is provided in the upper portion of said shell and said motor is positioned in the lower portion of said shell between said sump and said compressing unit.
Claim 6
Dependent Claim
234 words
A rotary hermetic refrigerant compressor comprising: a rotary, sliding vane refrigerant compressing unit having an inlet and an outlet; a motor operatively connected to drive said compressing unit; a hermetic shell enclosing said compressing unit and said motor; means defining a lubricant sump in the lower portion of said shell below said motor, said motor being positioned between said compressing unit and said sump; means defining an annular lubricant-refrigerant separator chamber adjacent the outlet of said refrigerant compressing unit, the outer boundary of said chamber being defined by a portion of the inside wall of said shell such that separated lubricant is directed into contact with said inside wall and flows downwardly thereover to said lubricant sump, so that heat is abstracted from said lubricant through said shell wall and rejected to the outside of said shell; means for directing lubricant from said sump to said motor and compressing unit for lubricating and cooling purposes; a separator element in said annular lubricant-refrigerant separator chamber, said separator element having a surface in contact with the inside wall of said shell; a secondary separator positioned in the upper portion of said shell providing a passage between said compressing unit outlet and the exterior of said hermetic shell; and a rotary helical lift pump extending into said sump and adapted to carry lubricant for distribution through lubricating and cooling passages in said motor and said compressing unit.
Claim 7
Dependent Claim
234 words
A rotary hermetic refrigerant compressor comprising: a rotary, sliding vane refrigerant compressing unit having an inlet and an outlet; a motor operatively connected to drive said compressing unit; a hermetic shell enclosing said compressing unit and said motor; means defining a lubricant sump in the lower portion of said shell below said motor, said motor being positioned between said compressing unit and said sump; means defining an annular lubricant-refrigerant separator chamber adjacent the outlet of said refrigerant compressing unit, the outer boundary of said chamber being defined by a portion of the inside wall of said shell such that separated lubricant is directed into contact with said inside wall and flows downwardly thereover to said lubricant sump, so that heat is abstracted from said lubricant through said shell wall and rejected to the outside of said shell; means for directing lubricant from said sump to said motor and compressing unit for lubricating and cooling purposes; a separator element in said annular lubricant-refrigerant separator chamber, said separator element having a surface in contact with the inside wall of said shell; a secondary separator positioned in the upper portion of said shell providing a passage between said compressing unit outlet and the exterior of said hermetic shell; and a rotary helical lift pump extending into said sump and adapted to carry lubricant for distribution through lubricating and cooling passages in said motor and said compressing unit.
References Cited (Backward Citations)
US1566919A
Cited
US1878403A
Cited
US2787136A
Cited
US3408826A
Cited
US3408828A
Cited
US3408827A
Cited
US3833318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |