US4010620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system
Assignee: University of Delaware
•
Filing: 1975-10-08
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Granted: 1977-03-08
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Expires: 1995-10-08
Abstract
Abstract A cooling system for air conditioning of buildings which comprises creating a cold medium by dissolving a salt in water, said salt being characterized by forming an endothermic solution, passing air through or over said cold solution to cool the air before introduction into said building, after the potential cooling effect is exhausted the salt is recovered by evaporation of the water from the solution with hot air, said hot air being at least partly heated by solar energy.
Inventors
- 👤 Maria Telkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:17
CPC Classifications
F; F25; F25B; F25B23/00; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1417; F24F5/00; F24F5/0046; F25B27/00; F25B27/002; F25D; F25D5/00; F24F2003/144; Y; Y02; Y02B; Y02B10/00; Y02B10/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
The method for air conditioning buildings which comprises dissolving in water a salt having an endothermic heat of solution, to create a cold solution, passing air in heat exchange relationship with said cold solution to cool the air for introduction into said building, recovering the salt for reuse by evaporation of the water from the solution with hot air, the heating of the air being at least partly provided by solar heat.
Claim 2
Independent Claim
72 words
The method for air conditioning buildings which comprises dissolving in water a salt having an endothermic heat of solution, to create a cold solution, passing air in heat exchange relationship with said cold solution to cool the air for introduction into said building, recovering the salt for reuse by evaporation of the water from the solution with hot air, the heating of the air being at least partly provided by solar heat.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the air to be cooled is air from the building and the cooler air is returned to said building.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein the recovery of the salt from solution is carried out after the potential cooling effect is exhausted.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the air to be cooled is passed over a body of the cold solution.
Claim 6
Dependent Claim
58 words
The method of claim 2 wherein the air to be cooled is passed in heat exchange relationship with but out of contact with the cold solution and the cold solution passes countercurrent to the flow of air in a continuous manner, and at a rate so that the potential cooling effect is exhausted as it leaves the cooler.
Claim 7
Dependent Claim
28 words
The method of claim 5 wherein the cooling solution leaving the cooler is passed into a continuous process for evaporating the water and recovering the salt for reuse.
References Cited (Backward Citations)
US2154473A
Cited
US2690656A
Cited
US2677243A
Cited
US2841217A
Cited
US2798570A
Cited
US3232029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |