Refrigeration compressor capacity control system
Abstract
Abstract A MULTI-CYLINDER REFRIGERATION COMPRESSOR CAPACITY CONTROL SYSTEM, IN WHICH A PLURALITY OF COMPRESSOR UNLOADER MECHANISMS ARE OPERATED BY MEANS OF A CAPACITY CONTROL VALVE HAVING A DISPLACEABLE VALVE MEMBER THE POSITION OF WHICH IS ADJUSTABLE IN RESPONSE TO THE COMPRESSOR SUCTION PRESSURE IN COOPERATION WITH AN OPPOSED VALVE ACTUATING PRESSURE. THE ACTUATING PRESSURE IS VARIED BY MEANS OF A PRESSURE CONTROL VALVE IN ACCORDANCE WITH THE REQUIRED AMOUNT OF COLD, THE PRESSURE CONTROL VALVE CONNECTING THE COMPRESSOR SUCTION SIDE TO THE ACTUATING PRESSURE SIDE OF THE CAPACITY CONTROL VALVE THROUGH A NOZZLE. A NOZZLE-CLOSING PLATE CAN BE POSITIONED IN A MORE OR LESS INCLINED POSITION BY A SPRING-LOADED BELLOWS, AND THE NOZZLE AND NOZZLE-CLOSING PLATE ARE ROTATIONALLY ADJUSTABLE IN RALTION TO ONE ANOTHER.
Inventors
- 👤 Hans P Christensen
- 👤 Alfred Frosley
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |