Patent US4014181A successfully refreshed from Google Patents.
US4014181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning methods and apparatus
Assignee: Individual
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Filing: 1975-10-22
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Granted: 1977-03-29
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Expires: 1995-10-22
Abstract
Abstract Closed-circuit cooling processes, and apparatus for performing such processes, in which a working fluid is successively compressed, condensed through the removal of heat, expanded, and vaporised by take-up of heat from a fluid to be cooled, before being again compressed, the working fluid having been obtained by mixing refrigerant, having a boiling point within the range 0° to 60° C at atmospheric pressure, with air having a partial pressure initially, that is prior to use and throughout at least a major part of the volume of the circuit, of at least 0.05 atmospheres absolute.
Inventors
- 👤 Manfred Rolf Burger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:48
CPC Classifications
F; F25; F25B; F25B45/00; B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; F25B1/00; F25B1/04; F25B2345/00; F25B2345/001; F25B9/00; F25B9/002; F25B9/006
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
93 words
In a closed-circuit cooling process in which a working fluid is successively compressed, condensed through the removal of heat, expanded, and vaporized by take-up of heat from a fluid to be cooled, before being again compressed, the improvement comprising the steps of providing a working fluid by mixing a refrigerant, having a boiling point within the range 0° to 60° C at atmospheric pressure, with air having a partial pressure prior to use and throughout at least a major part of the volume of the circuit, of not less than 0.05 atmospheres absolute.
Claim 2
Dependent Claim
93 words
In a closed-circuit cooling process in which a working fluid is successively compressed, condensed through the removal of heat, expanded, and vaporized by take-up of heat from a fluid to be cooled, before being again compressed, the improvement comprising the steps of providing a working fluid by mixing a refrigerant, having a boiling point within the range 0° to 60° C at atmospheric pressure, with air having a partial pressure prior to use and throughout at least a major part of the volume of the circuit, of not less than 0.05 atmospheres absolute.
Claim 3
Dependent Claim
31 words
A process according to claim 1, in which the refrigerant was intially poured as a liquid into a part only of the circuit which sealed from the remainder of said circuit.
Claim 4
Dependent Claim
19 words
A process according to claim 1, in which the air was initially at atmospheric pressure and at ambient temperature.
Claim 5
Dependent Claim
78 words
A cooling apparatus comprising: a closed working fluid circuit, a working fluid in the circuit including a refrigerant having a boiling point within the range of 0° to 60° C at atmospheric pressure, said circuit including, in series, a compressor, a condenser and fluid vaporization means, and including means for initially charging the circuit by substantially filling the circuit with air at a pressure of not less than 0.05 atmospheres absolute, and mixing said air with said refrigerant.
Claim 6
Dependent Claim
78 words
A cooling apparatus comprising: a closed working fluid circuit, a working fluid in the circuit including a refrigerant having a boiling point within the range of 0° to 60° C at atmospheric pressure, said circuit including, in series, a compressor, a condenser and fluid vaporization means, and including means for initially charging the circuit by substantially filling the circuit with air at a pressure of not less than 0.05 atmospheres absolute, and mixing said air with said refrigerant.
Claim 7
Dependent Claim
23 words
Apparatus according to claim 4, in which the working fluid also comprises a lubricating and sealing oil which is compatible with the refrigerant.
Claim 8
Dependent Claim
46 words
Apparatus according to claim 4, in which a counter-current heat exchanger is arranged such that one flow therethrough is liquid working fluid passing from the condenser to the expansion restrictor, and the other flow therethrough is vapour-phase working fluid passing from the evaporator to the compressor.
Claim 9
Dependent Claim
14 words
Apparatus according to claim 4, in which the compressor is a rotary piston compressor.
Claim 10
Dependent Claim
29 words
Apparatus according to claim 7, in which the rotary piston compressor is powered by a drive, the rotary speed of which can be varied within the range of 1:7.
Claim 11
Dependent Claim
19 words
Apparatus according to claim 7, in which the rotary compressor is in permanent driving connection with a drive therefor.
Claim 12
Dependent Claim
23 words
Apparatus according to claim 7, in which the rotary piston compressor is powered by a drive in the form of an electric motor.
Claim 13
Dependent Claim
20 words
Apparatus according to claim 10, in which the electric motor is itself powered by an alternator of a motor vehicle.
Claim 14
Dependent Claim
18 words
Apparatus according to claim 4, in which the evaporator can be sealed from the remainder of the circuit.
Claim 15
Dependent Claim
14 words
A motor vehicle comprising air conditioning apparatus of the construction defined in claim 4.
References Cited (Backward Citations)
US1920845A
Cited
US2181854A
Cited
US2273213A
Cited
US2499170A
Cited
US3232070A
Cited
US3277659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |