US3867979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-conditioning method and apparatus with heat pump
Assignee: Cegelec SA
•
Filing: 1971-07-06
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Granted: 1975-02-25
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Expires: 1991-07-06
Abstract
Abstract To prevent icing on the vaporization surfaces of the condenser in a heat pump air-conditioning system, the temperature of the air in contact with the condenser is raised by applying additional heat thereto, for example by an electric heating coil, bleeding of fresh air, or feedback of heated air.
Inventors
- 👤 Jean Carrasse
- 👤 Denise Desbrosses
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:09
CPC Classifications
F; F24; F24F; F24F12/00; F24F12/001; F24F12/002; F24F12/003; F24F3/00; F24F3/001; F25; F25B; F25B29/00; F24F2012/007; F25B47/00; F25B47/006; Y; Y02; Y02B; Y02B30/00; Y02B30/52; Y02B30/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
162 words
Air-conditioning apparatus employing a heat pump of the kind continuously circulating air between a space to be conditioned and external ambient air and continuously performing inverse heat exchange operations relative to a refrigerant respectively on the intake air to said space and on the exhaust air therefrom, comprising a compressor, a condenser, and an evaporator c onnected in a closed circuit to form a heat pump and providing for the circulation of a refrigerant; means included in said circuit between said condenser and said evaporator for the expansion of said refrigerant; a first duct including air moving means for drawing exterior air over said condenser into an enclosed space; a second duct including air moving means for the exhaust of interior air over said evaporator from said enclosed space; and means included in said first duct for raising the temperature of condensation of said refrigerant within said condenser by reducing the cooling effect of the flow of exterior air over said condenser.
Claim 2
Dependent Claim
162 words
Air-conditioning apparatus employing a heat pump of the kind continuously circulating air between a space to be conditioned and external ambient air and continuously performing inverse heat exchange operations relative to a refrigerant respectively on the intake air to said space and on the exhaust air therefrom, comprising a compressor, a condenser, and an evaporator c onnected in a closed circuit to form a heat pump and providing for the circulation of a refrigerant; means included in said circuit between said condenser and said evaporator for the expansion of said refrigerant; a first duct including air moving means for drawing exterior air over said condenser into an enclosed space; a second duct including air moving means for the exhaust of interior air over said evaporator from said enclosed space; and means included in said first duct for raising the temperature of condensation of said refrigerant within said condenser by reducing the cooling effect of the flow of exterior air over said condenser.
Claim 3
Dependent Claim
29 words
Air-conditioning apparatus as defined in claim 1 wherein the temperature raising means includes an independent source of heat in said first duct between the entrance thereof and said condenser.
Claim 4
Dependent Claim
17 words
Air-conditioning apparatus as defined in claim 2 wherein said independent source of heat comprises an electrical resistance.
Claim 5
Dependent Claim
84 words
Air-conditioning apparatus as defined in claim 1 wherein the temperature raising means comprises a bypass line, including a regulator, having an inlet connected to said first duct between the entrance thereof and said condenser and an outlet connected to said first duct beyond said condenser, and the air moving means of said first duct is positioned thereiN beyond the outlet of said bypass line; thereby to provide a bypass of said condenser for a part of the exterior air drawn into said first duct.
Claim 6
Dependent Claim
81 words
Air-conditioning apparatus as defined in claim 1 wherein the temperature raising means comprises a bypass line, including a regulator, having an inlet connected to said first duct between the entrance thereof and said condenser and an outlet connected to said first duct beyond said condenser, and the air moving means of said first duct is positioned therein between said condenser and the outlet of said bypass line; thereby to recycle a part of the exterior air drawn into said first duct.
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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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |