Patent US4091636A successfully refreshed from Google Patents.
US4091636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pump system
Assignee: Studsvik Energiteknik AB
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Filing: 1977-01-24
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Granted: 1978-05-30
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Expires: 1997-01-24
Abstract
Abstract A heat pump system having a vaporizer in heat exchange relationship with a glycol/water circuit which comprises an earth heat absorber and an ambient air heat absorber in parallel.
Inventors
- 👤 Peter Heinrich Erwin Margen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:05
CPC Classifications
F; F25; F25B; F25B30/00; F25B30/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
129 words
In a heat pump system comprising a refrigerant circuit (1) comprising in series an expansion valve, a first vaporizer, a compressor and a condenser which condenser is arranged to transfer condensation heat of the refrigerant medium to a medium such as radiator water, said vaporizer being arranged in heat exchange relationship with a secondary circuit which is filled with a liquid having low freezing temperature and which comprises a circulation pump (8) for the liquid, at least one earth heat absorber being included in the secondary circuit, the improvement that an air heat absorber which is situated outdoors is arranged in the secondary circuit in parallel with the earth heat absorber, and that valve means are arranged for the heat absorbers for control of the flow distribution between them.
Claim 2
Dependent Claim
129 words
In a heat pump system comprising a refrigerant circuit (1) comprising in series an expansion valve, a first vaporizer, a compressor and a condenser which condenser is arranged to transfer condensation heat of the refrigerant medium to a medium such as radiator water, said vaporizer being arranged in heat exchange relationship with a secondary circuit which is filled with a liquid having low freezing temperature and which comprises a circulation pump (8) for the liquid, at least one earth heat absorber being included in the secondary circuit, the improvement that an air heat absorber which is situated outdoors is arranged in the secondary circuit in parallel with the earth heat absorber, and that valve means are arranged for the heat absorbers for control of the flow distribution between them.
Claim 3
Dependent Claim
20 words
A system according to claim 1 wherein a second vaporizer is connected in the refrigerant circuit and is positioned outdoors.
Claim 4
Dependent Claim
36 words
A system according to claim 2 wherein the first and the second vaporizer are arranged in parallel and wherein a valve means is arranged to control the flow distribution between the first and the second vaporizer.
Claim 5
Dependent Claim
18 words
A system according to claim 2 wherein the second vaporizer is connected in series with the first vaporizer.
Claim 6
Dependent Claim
25 words
A system according to claim 1 wherein a fan is arranged to enhance the heat exchange between the ambient air and the air heat absorber.
Claim 7
Dependent Claim
24 words
A system according to claim 2 wherein a fan is arranged to enhance the heat exchange between the ambient air and the second vaporizer.
Claim 8
Dependent Claim
73 words
A system according to claim 6 wherein the second vaporizer is arranged in parallel with the first vaporizer, and wherein a sensor is arranged to start the circulation pump, shut off the fan, close the valve of the second vaporizer when the ambient temperature falls below a certain value at which frost formation tends to occur on the air heat absorber and vice versa, when the ambient air temperature raises above said value.
Claim 9
Dependent Claim
51 words
A system according to claim 7 wherein a shut off valve is arranged for the first vaporizer and wherein said sensor is arranged to open said valve for the first vaporizer when the ambient temperature falls below said value and vice versa when the ambient air temperature raises above said value.
Claim 10
Dependent Claim
55 words
A system according to claim 5 wherein a sensor is arranged to shut off the fan, close the valve to the air heat absorber and open the valve for the earth heat absorber when the ambient air temperature falls below a certain value and vice versa when the ambient air temperature raises above said value.
Claim 11
Dependent Claim
16 words
A system according to claim 1 wherein the secondary circuit comprises a tubing of plastic material.
Claim 12
Dependent Claim
18 words
A system according to claim 1 wherein the earth heat absorber consists of a coil of plastic tubing.
Claim 13
Dependent Claim
19 words
A system according to claim 1 wherein the air heat absorber consists of a coiled tube of plastic material.
Claim 14
Dependent Claim
20 words
A system according to claim 1 wherein the earth heat absorber is positioned in the ground on frost safe depth.
Claim 15
Dependent Claim
13 words
A system according to claim 2 wherein the first vaporizer is positioned indoors.
Claim 16
Dependent Claim
13 words
A system according to claim 2 wherein the first vaporizer is positioned outdoors.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |