US3750416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling of absorption refrigeration system
Assignee: Arkla Industries Inc
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Filing: 1971-04-02
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Granted: 1973-08-07
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Expires: 1991-04-02
Abstract
Abstract The absorber in a salt solution absorption refrigeration machine is cooled by heat exchange with a stream of refrigerant liquid obtained from the evaporator. The refrigerant vaporizes in absorbing heat and the vapor then passes to an air-cooled condenser by means of an ejector device which employs hot refrigerant vapor flowing from the generator as the driving fluid.
Inventors
- 👤 D Kuhlenschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:54
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
A refrigeration system as in claim 1 wherein the conduit means for conducting liquid refrigerant from the evaporator to the absorber includes a U-shaped liquid trap.
Claim 2
Dependent Claim
39 words
A refrigeration system as in claim 1 wherein the evaporator is located at a higher elevation than the absorber and wherein the conduit means for conducting liquid refrigerant from the evaporator to the absorber includes a U-shaped liquid trap.
Claim 3
Dependent Claim
151 words
In a method of operating an absorption type refrigeration system in which refrigerant vapor is expelled from a solution of the refrigerant in a liquid absorbent by heating the solution, condensed by heat exchange with a coolant stream, partially evaporated in an evaporator vessel so that unvaporized refrigerant exists in the evaporator vessel as excess liquid refrigerant, and re-absorbed in the liquid absorbent in an absorber vessel which is in communication with the evaporator vessel, the improvement which comprises: cooling the absorbent in the absorber vessel by continuously conducting said excess liquid refrigerant directly from the evaporator vessel into heat exchange relationship with the absorbent in the absorbent vessel and thereby vaporize the liquid refrigerant whereby the temperature and hence the pressure in the latter are lowered and whereby the lowered pressure appears in the evaporator vessel; and subsequently condensing the resulting vaporized refrigerant by heat exchange with said coolant stream.
Claim 4
Dependent Claim
48 words
A method as in claim 4 wherein the vaporized refrigerant is conducted away from the absorber vessel and into heat exchange with the coolant stream by aspiration with a stream of the refrigerant vapor which is being expelled by heating a solution of refrigerant in a liquid absorbent.
Claim 5
Dependent Claim
13 words
A method as in claim 5 wherein said coolant stream is ambient air.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |