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US4574592A
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US
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Heat pump with liquid-gas working fluid
Assignee: CANATEX DEVELOPMENT CORP PO BOX 2045 BRANTFORD ONTARIO CANADA N3T 5W5
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Filing: 1984-01-09
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Granted: 1986-03-11
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Expires: 2004-01-09
Abstract
Abstract A method and apparatus for the pumping of heat wherein a working fluid is alternately compressed and expanded in a machine, and which usually provides for heat removal after the compression. The working fluid is a gas-liquid mixture comprising usually a gas such as argon and a liquid such as light oil, with such fluid mixture circulating within the machine both during compression and expansion. Normal uses for this machine are home heating and other heating uses.
Inventors
- 👤 Michael Eskeli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:12
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/002; F25B29/00; F25B29/003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
A thermodynamic method of pumping heat comprising: a. compressing a working fluid with accompanying pressure and temperature increase and the use of work; b. removing heat from said working fluid downstream of the compression; c. expanding said working fluid with accompanying (temperature and) pressure reduction and the recovery of work subsequent to the heat removal; d. providing as said working fluid a fluid mixture comprising a compressible gas and a liquid where said gas and liquid are different fluids, and wherein the function of said liquid is to cool said gas during compression and to heat said gas during expansion, and further, wherein approximately the same fluid mixture passes passes through the expansion and compression steps, and also, wherein the amount of liquid in the gas-liquid mixture is less than what is required to maintain a constant fluid temperature during compression thus providing for the temperature increase during the compression; e. providing a non-flow positive displacement process for said working fluid during the compression and expansion steps.
Claim 2
Dependent Claim
167 words
A thermodynamic method of pumping heat comprising: a. compressing a working fluid with accompanying pressure and temperature increase and the use of work; b. removing heat from said working fluid downstream of the compression; c. expanding said working fluid with accompanying (temperature and) pressure reduction and the recovery of work subsequent to the heat removal; d. providing as said working fluid a fluid mixture comprising a compressible gas and a liquid where said gas and liquid are different fluids, and wherein the function of said liquid is to cool said gas during compression and to heat said gas during expansion, and further, wherein approximately the same fluid mixture passes passes through the expansion and compression steps, and also, wherein the amount of liquid in the gas-liquid mixture is less than what is required to maintain a constant fluid temperature during compression thus providing for the temperature increase during the compression; e. providing a non-flow positive displacement process for said working fluid during the compression and expansion steps.
Claim 3
Dependent Claim
40 words
The method of pumping heat of claim 1 wherein a heat exchanger for heat transfer is provided for said working fluid downstream of the expansion step, to provide an approximately constant temperature for said fluid prior to start of compression.
Claim 4
Dependent Claim
15 words
The method of pumping heat of claim 1 wherein the said compressible gas is argon.
Claim 5
Dependent Claim
42 words
The method of pumping heat of claim 1 wherein the said fluid mixture circulates through the compressing and expanding and heat exchange means in a closed loop and wherein the working fluid lowest pressure within the loop is higher than atmospheric pressure.
Claim 6
Dependent Claim
27 words
The method of claim 1 wherein said liquid in the working fluid mixture is a liquid that forms a foam when circulated within the heat pumping apparatus.
References Cited (Backward Citations)
US3768273A
Cited
US3872682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |