US4031712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined absorption and vapor-compression refrigeration system
Assignee: University of Delaware
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Filing: 1975-12-04
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Granted: 1977-06-28
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Expires: 1995-12-04
Abstract
Abstract A conventional absorption refrigeration system is combined in series with a vapor compression refrigeration system to effect the improvement, which comprises compressing the vapor refrigerant from the evaporator before introducing it into the absorber and/or compressing the vapor refrigerant from the generator before introducing it into the condenser. One bypass permits direct operation as a vapor-compression refrigeration system. Bypasses also permit direct operation as an absorption system.
Inventors
- 👤 Frederick Alexander Costello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:14
CPC Classifications
F; F25; F25B; F25B25/00; F25B25/02; F25B1/00; F25B15/00; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
167 words
In a closed cyclic absorption-refrigeration system using in combination a. means for absorbing a vapor refrigerant in an absorbent b. means for increasing the pressure on the absorbent containing the refrigerant c. means for heating the absorbent-refrigerant mixture to drive off the refrigerant as a vapor d. means for cooling said refrigerant vapor to condense same to a liquid e. means for reducing the pressure on said liquid to permit same to evaporate f. heat exchange means for cooling fluids outside the system by the evaporation of the refrigerant and g. means for recycling the refrigerant vapor to the said absorbing means the improvement which comprises a compressor for increasing the vapor pressure of the refrigerant vapor after it leaves the heat exchange means and before it is recycled to said absorbing means, and a compressor for increasing the vapor pressure of the refrigerant vapor after it is driven off from the absorbent-refrigerant mixture and before it enters the means for cooling to condense the refrigerant vapor.
Claim 2
Dependent Claim
167 words
In a closed cyclic absorption-refrigeration system using in combination a. means for absorbing a vapor refrigerant in an absorbent b. means for increasing the pressure on the absorbent containing the refrigerant c. means for heating the absorbent-refrigerant mixture to drive off the refrigerant as a vapor d. means for cooling said refrigerant vapor to condense same to a liquid e. means for reducing the pressure on said liquid to permit same to evaporate f. heat exchange means for cooling fluids outside the system by the evaporation of the refrigerant and g. means for recycling the refrigerant vapor to the said absorbing means the improvement which comprises a compressor for increasing the vapor pressure of the refrigerant vapor after it leaves the heat exchange means and before it is recycled to said absorbing means, and a compressor for increasing the vapor pressure of the refrigerant vapor after it is driven off from the absorbent-refrigerant mixture and before it enters the means for cooling to condense the refrigerant vapor.
Claim 3
Dependent Claim
139 words
In a closed cyclic absorption-refrigeration system using in combination a. means for absorbing a vapor refrigerant in an absorbent b. means for increasing the pressure on the absorbent containing the refrigerant c. means for heating the absorbent-refrigerant mixture to drive off the refrigerant as a vapor d. means for cooling said refrigerant vapor to condense same to a liquid e. means for reducing the pressure on said liquid to permit same to evaporate f. heat exchange means for cooling fluids outside the system by the evaporation of the refrigerant and g. means for recycling the refrigerant vapor to the said absorbing means the improvement which comprises a compressor for increasing the vapor pressure of the refrigerant vapor after it is driven off from the absorbent-refrigerant mixture and before it enters the means for cooling to condense the refrigerant vapor.
Claim 4
Dependent Claim
139 words
In a closed cyclic absorption-refrigeration system using in combination a. means for absorbing a vapor refrigerant in an absorbent b. means for increasing the pressure on the absorbent containing the refrigerant c. means for heating the absorbent-refrigerant mixture to drive off the refrigerant as a vapor d. means for cooling said refrigerant vapor to condense same to a liquid e. means for reducing the pressure on said liquid to permit same to evaporate f. heat exchange means for cooling fluids outside the system by the evaporation of the refrigerant and g. means for recycling the refrigerant vapor to the said absorbing means the improvement which comprises a compressor for increasing the vapor pressure of the refrigerant vapor after it is driven off from the absorbent-refrigerant mixture and before it enters the means for cooling to condense the refrigerant vapor.
Claim 5
Dependent Claim
34 words
The refrigeration system of claim 1 having a bypass conduit with a check valve that would permit operating of means d, e, and f of the system without the operation of the remaining means.
Claim 6
Dependent Claim
34 words
The refrigeration system of claim 2 having a bypass conduit with a check valve that would permit operating of means d, e, and f of the system without the operation of the remaining means.
Claim 7
Dependent Claim
38 words
The refrigeration system of claim 1 have a bypass conduit with a check valve that would permit operating of means a, b, e, c, e, f and g without operating of the means for increasing the vapor pressure.
Claim 8
Dependent Claim
38 words
The refrigeration system of claim 2 having a bypass conduit with a check valve that would permit operating of means a, b, c, d, e, f and g without operating of the means for increasing the vapor pressure.
References Cited (Backward Citations)
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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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |