US3831397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage absorption refrigeration system
Assignee: Individual
•
Filing: 1973-05-01
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Granted: 1974-08-27
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Expires: 1993-05-01
Abstract
Abstract There is provided an improved multi-stage absorption refrigeration system employing a highly concentrated solution of refrigerant to obtain an increased refrigeration effect relative to the quantity of input heat to the system as compared with a conventional system, comprising a multi-stage regeneratorcondenser system and at least a one-stage evaporator-absorber system provided with a pressure elevating device therebetween.
Inventors
- 👤 G Mamiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:36
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/008; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
220 words
An absorption refrigeration system comprising a plurality of successive regenerator condensor vessels each having a heat exchange therein, an evaporator system, an absorber system, and a highly concentrated refrigerant solution therein, said system further comprising means for applying heat to the heat exchanger of a first one of said vessels, means for passing concentrated refrigerant solution from said absorber system to said first one of said vessels for absorbing heat from the heat exchanger therein to regenerate a refrigerant vapor and a dilute residue of solution therein, means for passing dilute residue from all but a second of said vessels to a succeeding vessel for absorbing heat from the heat exchanger in the respective succeeding vessel to regenerate a refrigerant vapor and a dilute residue of solution therein, means for passing refrigerant vapor from all but said second vessel to the heat exchanger of a succeeding vessel, means for condensing vapor from said second vessel to a liquid, means for passing liquid from said means for condensing and from said heat exchanger of all but said first vessel to said evaporator system for vaporization therein, means for passing dilute residue from said second vessel to said absorber system, and means for increasing the pressure of vapors in said evaporator system and applying them to said absorber system for absorption therein.
Claim 2
Dependent Claim
220 words
An absorption refrigeration system comprising a plurality of successive regenerator condensor vessels each having a heat exchange therein, an evaporator system, an absorber system, and a highly concentrated refrigerant solution therein, said system further comprising means for applying heat to the heat exchanger of a first one of said vessels, means for passing concentrated refrigerant solution from said absorber system to said first one of said vessels for absorbing heat from the heat exchanger therein to regenerate a refrigerant vapor and a dilute residue of solution therein, means for passing dilute residue from all but a second of said vessels to a succeeding vessel for absorbing heat from the heat exchanger in the respective succeeding vessel to regenerate a refrigerant vapor and a dilute residue of solution therein, means for passing refrigerant vapor from all but said second vessel to the heat exchanger of a succeeding vessel, means for condensing vapor from said second vessel to a liquid, means for passing liquid from said means for condensing and from said heat exchanger of all but said first vessel to said evaporator system for vaporization therein, means for passing dilute residue from said second vessel to said absorber system, and means for increasing the pressure of vapors in said evaporator system and applying them to said absorber system for absorption therein.
Claim 3
Dependent Claim
23 words
The absorption refrigeration system of claim 1 wherein said evaporator system comprises a single evaporator, and said absorber system comprises a single absorber.
Claim 4
Dependent Claim
72 words
The absorption refrigeration system of claim 2 wherein said means for passing concentrated refrigerant solution from said absorber system comprises means for passing concentrated refrigerant solution from said absorber in heat transfer with said means for passing liquid from said heat exchangers to said evaporator system and in heat transfer relationship with said means for passing dilute residue from said vessels to a succeeding vessel, to said first one of said vessels.
Claim 5
Dependent Claim
203 words
The absorption refrigeration system of claim 1 wherein said evaporator system comprises a plurality of evaporators and said absorber system comprises a plurality of absorbers, said means for increasing the pressure of said vapors comprising separate pressure elevating means interconnected in each evaporator with a separate absorber to form a plurality of evaporator absorber units, further comprising means for passing concentrated solution of refrigerant produced in all but a last one of said units successively from a first of said units to the absorber of a succeeding one of said units, said means for passing concentrated refrigerant solution from said absorber system comprising means for passing concentrated refrigerant solution from the absorber of said last unit to said first vessel, said means for passing liquid comprising means for passing liquid in succeeding order from the heat exchanger of said vessel next succeeding the first vessel to the evaporators of said units in an order succeeding from said last unit, and means for passing liquid from said means for condensing to the evaporator of said first unit, said means for passing dilute residue from said second vessel comprising means for passing dilute residue from said second vessel to the absorber of said first unit.
Claim 6
Dependent Claim
46 words
The absorption refrigeration system of claim 4 comprising mEans for passing said concentrated refrigerant solution from the last absorber in heat transfer relationship to said means for passing liquid in succeeding order and in heat transfer relationship to dilute residue passed from each of said vessels.
Claim 7
Dependent Claim
54 words
The absorption refrigeration system of claim 1, wherein the concentrated refrigerant solution to be passed from said absorber system to said first one of said vessels comprises a water-lithium bromide solution having a water concentration in excess of = 45 percent by weight or a lithium bromide concentration less than 55 percent by weight.
References Cited (Backward Citations)
US1109923A
Cited
US2446988A
Cited
US3137144A
Cited
US3273350A
Cited
US3651655A
Cited
US3717007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |