US3742728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage absorption refrigeration system
Assignee: Individual
•
Filing: 1971-09-15
•
Granted: 1973-07-03
•
Expires: 1991-09-15
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. In this evaporator-absorber system, the refrigerant from said regenerator-condenser system is vaporized in the evaporator, subsequently increased in pressure through the pressure elevating device and then absorbed at the increased pressure in the absorber.
Inventors
- 👤 G Mamiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:54
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: 5
Claim 1
Independent Claim
196 words
An absorption refrigeration system comprising a plurality of successive regenerator-condenser vessels each having a heat exchanger therein, an evaporator, an absorber, and a concentrated refrigerant solution in said system, said system further comprising means for applying external heat to the heat exchanger of a first one of said vessels, means for passing concentrated refrigerant solution from said absorber to each of said vessels for absorbing heat from the respective heat exchanger to regenerate a refrigerant vapor and a dilute residue of solution therein, means returning said diluted residue from said vessels in common to said absorber, means for passing said regenerated vapor from all but a second one of said vessels to the heat exchanger of a successive vessel for condensation therein to a liquid, means for condensing said vapor from said second vessel to a liquid, means for passing the liquid from said means for condensing and from the heat exchanger of all but said first of said vessels to said evaporator for vaporization therein to produce a refrigeration effect, and means for increasing the pressure of the vapors in said evaporator and applying them to said absorber for absorption by the diluted residue therein.
Claim 2
Dependent Claim
196 words
An absorption refrigeration system comprising a plurality of successive regenerator-condenser vessels each having a heat exchanger therein, an evaporator, an absorber, and a concentrated refrigerant solution in said system, said system further comprising means for applying external heat to the heat exchanger of a first one of said vessels, means for passing concentrated refrigerant solution from said absorber to each of said vessels for absorbing heat from the respective heat exchanger to regenerate a refrigerant vapor and a dilute residue of solution therein, means returning said diluted residue from said vessels in common to said absorber, means for passing said regenerated vapor from all but a second one of said vessels to the heat exchanger of a successive vessel for condensation therein to a liquid, means for condensing said vapor from said second vessel to a liquid, means for passing the liquid from said means for condensing and from the heat exchanger of all but said first of said vessels to said evaporator for vaporization therein to produce a refrigeration effect, and means for increasing the pressure of the vapors in said evaporator and applying them to said absorber for absorption by the diluted residue therein.
Claim 3
Dependent Claim
32 words
The refrigerator system of claim 1 further comprising heat transfer means coupled between said means returning said diluted residue and said means for passing said concentrated refrigerant solution of each respective vessel.
Claim 4
Dependent Claim
23 words
The refrigeration system of claim 1 wherein said means for passing concentrated refrigerant solution includes separate regulating valve means for each said vessel.
Claim 5
Dependent Claim
24 words
The refrigeration system of claim 1 wherein said means for condensing said vapor from said second vessel to a liquid comprises an evaporative condenser.
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) | 1976-07-02 | 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 |