US4430867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cycle refrigeration system
Assignee: RTX Corp
•
Filing: 1981-08-24
•
Granted: 1984-02-14
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Expires: 2001-08-24
Abstract
Abstract An air cycle refrigeration system (10) for cooling and ventilating an enclosure such as an aircraft cabin (15) includes a circulation heat exchanger (145) for absorbing heat from air within the cabin, a sink heat exchanger (120) for delivering the heat absorbed from the cabin air to exhaust air from the system's turbine (80) and for melting ice in the exhaust air. A heat exchange liquid circulates through both heat exchangers in a single loop (100). The circulation heat exchanger (145) may be located in the interior of the cabin (15).
Inventors
- 👤 John L. Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:40
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B60; B60H; B60H1/00; B60H1/32; B64D2013/0603; B64D2013/0688; F; F25; F25B; F25B9/00; F25B9/002; F25B9/004
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
186 words
An air cycle refrigeration system wherein pressurized air is received by said system, expanded and cooled in a turbine and exhausted through an outlet of said turbine to an enclosure, said system including means for circulating air within said enclosure and being characterized by: a circulation heat exchanger communicating with said enclosure air for absorbing heat therefrom; a sink heat exchanger communicating with said turbine exhaust air for delivering heat thereto; a condensing heat exchanger communicating upstream of said turbine with turbine inlet air for absorbing heat therefrom; and a liquid heat exchange medium circulating in a closed loop through said circulation and sink heat exchangers, said liquid medium transferring heat absorbed from said enclosure air to said turbine exhaust for the simultaneous cooling of said enclosure air and warming said turbine exhaust for the melting of ice therein, said liquid heat exchange medium circulating through said condensing heat exchanger serially with said circulation and sink heat exchangers for cooling said turbine inlet air for the removal of water therefrom simultaneously with said cooling of said enclosure air and said warming of said turbine exhaust air.
Claim 2
Dependent Claim
186 words
An air cycle refrigeration system wherein pressurized air is received by said system, expanded and cooled in a turbine and exhausted through an outlet of said turbine to an enclosure, said system including means for circulating air within said enclosure and being characterized by: a circulation heat exchanger communicating with said enclosure air for absorbing heat therefrom; a sink heat exchanger communicating with said turbine exhaust air for delivering heat thereto; a condensing heat exchanger communicating upstream of said turbine with turbine inlet air for absorbing heat therefrom; and a liquid heat exchange medium circulating in a closed loop through said circulation and sink heat exchangers, said liquid medium transferring heat absorbed from said enclosure air to said turbine exhaust for the simultaneous cooling of said enclosure air and warming said turbine exhaust for the melting of ice therein, said liquid heat exchange medium circulating through said condensing heat exchanger serially with said circulation and sink heat exchangers for cooling said turbine inlet air for the removal of water therefrom simultaneously with said cooling of said enclosure air and said warming of said turbine exhaust air.
Claim 3
Dependent Claim
54 words
The air cycle refrigeration system of claim 1 further characterized by said circulation heat exchanger being disposed interiorly of said enclosure, and said sink heat exchanger being disposed exteriorly of said enclosure whereby communication between said first and second heat exchangers for heat transport therebetween requires penetration of said enclosure by liquid conduits only.
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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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |