US3742726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption refrigeration system
Assignee: Carrier Corp
•
Filing: 1971-06-02
•
Granted: 1973-07-03
•
Expires: 1991-06-02
Abstract
Abstract An absorption refrigeration system employing a secondary refrigerant to transfer heat from a suitable heat exchanger to the system evaporator; pump means to circulate absorbent solution and the secondary refrigerant; and ejectors for increasing pump inlet pressures to prevent refrigerant flashing at the pump inlets.
Inventors
- 👤 R English
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:02
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/04; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62; Y10; Y10S; Y10S62/00; Y10S62/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
140 words
In an absorption refrigeration system including an absorber, a condenser, a chiller and a generator connected to provide refrigeration, apparatus comprising: pulser type pump means for circulating refrigerant fluid in a refrigeration cycle through said chiller, said pump means having an inlet and a discharge side; and an ejector for receiving refrigerant fluid and for passing the fluid to said pulser type pump means, said ejector including nozzle means and a throat, said throat leading to the inlet of said pump means and said nozzle means discharging a portion of the refrigerant fluid frOm the discharge side of said pulser type pump means into the throat of said ejector to maintain pressure at the inlet of said pulser type pump means above the vapor pressure of the refrigerant fluid being pumped to prevent flashing of the fluid at said inlet.
Claim 2
Dependent Claim
140 words
In an absorption refrigeration system including an absorber, a condenser, a chiller and a generator connected to provide refrigeration, apparatus comprising: pulser type pump means for circulating refrigerant fluid in a refrigeration cycle through said chiller, said pump means having an inlet and a discharge side; and an ejector for receiving refrigerant fluid and for passing the fluid to said pulser type pump means, said ejector including nozzle means and a throat, said throat leading to the inlet of said pump means and said nozzle means discharging a portion of the refrigerant fluid frOm the discharge side of said pulser type pump means into the throat of said ejector to maintain pressure at the inlet of said pulser type pump means above the vapor pressure of the refrigerant fluid being pumped to prevent flashing of the fluid at said inlet.
Claim 3
Dependent Claim
49 words
Apparatus according to claim 1, wherein said pulser type pump means includes: a housing; a diaphragm disposed within said housing; and means for providing a pulsating supply of hydraulic fluid to one side of said diaphragm for pulsing said diaphragm to circulate the refrigerant fluid in the refrigeration cycle.
Claim 4
Dependent Claim
128 words
Apparatus according to claim 1, and further comprising: pump means for transferring absorbent fluid from said absorber to said generator, said pump means having an inlet and a discharge side; and a second ejector for receiving absorbent fluid from said absorber and for passing the absorbent fluid to said absorbent fluid pump means, said second ejector including nozzle means and a throat, said throat leading to the inlet of said pump means and said nozzle means discharging a portion of the absorbent fluid from the discharge side of said absorbent fluid pump means into the throat of said second ejector to maintain pressure at the pump inlet above the vapor pressure of the refrigerant in said absorbent fluid to prevent flashing of the refrigerant at the pump inlet.
Claim 5
Dependent Claim
49 words
Apparatus according to claim 3 wherein said refrigerant fluid pump means and said absorbent fluid pump means are operable by hydraulic pressure, and said apparatus further includes a hydraulic pump connected to both of said pump means for transmitting the hydraulic pressure for operating each of said pump means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |