US4304104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitot heat pump
Assignee: Enron Corp
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Filing: 1980-05-02
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Granted: 1981-12-08
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Expires: 2000-05-02
Abstract
Abstract A pitot heat pump is described wherein a multi-stage pitot pump is employed as the compression means in a heat pump thermodynamic cycle. The heat pump is comprised of a multi-stage vapor pitot pump, liquid pitot pump, turbine, vaporizer, evaporator, condenser and expansion valve. The turbine is used to rotate a shaft to which the impellers of the pitot pump are attached. Refrigerant gas from the evaporator enters the first stage of the pitot pump and the impeller therein forces the refrigerant gas outwardly where it enters the narrow end of a pitot tube provided therein. The discharge end of the pitot tube is in communication with the next stage of the pitot pump. In passing through the pitot tube, the refrigerant gas expands and the centrifugal force and the kinetic energy of the gas provide the energy whereby the refrigerant gas is compressed. After the last stage, the compressed gas is transmitted to the condenser of the heat pump.
Inventors
- 👤 Ronald D. Grose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:37
CPC Classifications
F; F25; F25B; F25B27/00; F04; F04D; F04D1/00; F04D1/12; F04D17/00; F04D17/02; F04D17/025; F04D17/08; F04D17/16; F04D17/165; F25B29/00; F25B29/003; F25B3/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
183 words
A heat pump comprising, a pitot pump, liquid pump, turbine, vaporizer, evaporator, condenser and expansion valve having inlets and outlets, the outlet of said liquid pump being fluidly connected to the inlet of said expansion valve, the outlet of said expansion valve being fluidly connected to the inlet of said evaporator, the outlet of said evaporator being fluidly connected to the inlet of said pitot pump, the outlet of said pitot pump being fluidly connected to the inlet of said condenser, the outlet of said condenser being fluidly connected to the inlet of said liquid pump, the outlet of said liquid pump being fluidly connected to the inlets of said vaporizer and expansion valve, the outlet of said vaporizer being fluidly connected to the inlet of said turbine, the outlet of said turbine being fluidly connected to the inlet of said condenser, means mechanically connecting said turbine to said pitot pump and liquid pitot pump whereby said pumps will be operated thereby, means for heating the gas in said vaporizer whereby gas under pressure is supplied to said turbine to operate the same.
Claim 2
Dependent Claim
183 words
A heat pump comprising, a pitot pump, liquid pump, turbine, vaporizer, evaporator, condenser and expansion valve having inlets and outlets, the outlet of said liquid pump being fluidly connected to the inlet of said expansion valve, the outlet of said expansion valve being fluidly connected to the inlet of said evaporator, the outlet of said evaporator being fluidly connected to the inlet of said pitot pump, the outlet of said pitot pump being fluidly connected to the inlet of said condenser, the outlet of said condenser being fluidly connected to the inlet of said liquid pump, the outlet of said liquid pump being fluidly connected to the inlets of said vaporizer and expansion valve, the outlet of said vaporizer being fluidly connected to the inlet of said turbine, the outlet of said turbine being fluidly connected to the inlet of said condenser, means mechanically connecting said turbine to said pitot pump and liquid pitot pump whereby said pumps will be operated thereby, means for heating the gas in said vaporizer whereby gas under pressure is supplied to said turbine to operate the same.
Claim 3
Dependent Claim
15 words
The heat pump of claim 1 wherein said liquid pump comprises a second pitot pump.
Claim 4
Dependent Claim
168 words
The heat pump of claim 1 wherein said pitot pump comprises a vertically disposed housing having upper and lower ends, said housing having a plurality of spaced apart compartments therein defining at least an uppermost compartment, a lowermost compartment and an intermediate compartment therebetween, said uppermost compartment being in fluid communication with the outlet of said evaporator, said turbine including a vertically disposed rotatable shaft extending through said compartments, a cup-like impeller means in each of said compartments mounted on said shaft for rotation therewith, a pitot tube in each of said compartments having an inlet end positioned within said impeller means for receiving fluid supplied thereto by said impeller means, the discharge end of the pitot tube in said uppermost compartment being in communication with said intermediate compartment, the discharge end of the pitot tube in said intermediate compartment being in communication with said lowermost compartment, the discharge end of the pitot tube in said lowermost compartment being in operative communication with the inlet of said condenser.
Claim 5
Dependent Claim
17 words
The heat pump of claim 3 wherein said housing has a plurality of intermediate compartments provided therein.
Claim 6
Dependent Claim
15 words
The heat pump of claim 3 wherein said each of cup-like impeller means is inverted.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |