US4055055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosiphonic boiler
Assignee: Individual
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Filing: 1976-03-12
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Granted: 1977-10-25
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Expires: 1996-03-12
Abstract
Abstract A thermosiphonic boiler with two mutually communicating water containers, one above the other, said containers housing water volumes being thermically insulated from the surroundings of the boiler and from each other by heat insulation in the boiler walls and in an intermediate wall common to the containers and separating their water volumes. The lower container is incorporated in an energy supply circuit through which water from the lower portion of the container is caused by a pump to flow through a solar radiation trap heating the water passing therethrough, and back to the upper portion of the lower container. The upper container is connected to a circulation circuit through which water from the upper portion of the container is returned by means of a pump to its lower portion after having passed through radiators. In the water volume of the upper container there is provided a hot water supplier with heating means from which supplier hot water can be tapped off. The intermediate wall constitutes a pressure vessel preheating fresh water supplied to the hot water supplier, there being provided in the intermediate wall a central pipe stub extending through the wall, through which pipe stub, water from the upper portion of the lower container can flow by thermosiphonic action up into the upper container, there being provided at the circumference of the intermediate wall openings through which water from the lower portion of the upper container can flow down into the lower container.
Inventors
- 👤 Ludvig L. Horwitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:54
CPC Classifications
F; F28; F28D; F28D20/00; F28D20/0034; F24; F24D; F24D11/00; F24D11/002; F24D11/003; F24D3/00; F24D3/08; Y; Y02; Y02B; Y02B10/00; Y02B10/20; Y02E; Y02E60/00; Y02E60/14; Y02E70/00; Y02E70/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
284 words
A thermosiphonic boiler with two mutually communicating water containers (2,3), one (3) situated above the other (2), said containers housing water volumes which are thermically insulated from the surroundings of the boiler by means of heat insulation (4) in the walls of the boiler and respectively from each other by means of a heat insulating layer (6) in an intermediate wall structure (5;21;31), common to both containers, which separates their water volumes, characterized in that the lower container (2) is incorporated in an energy supply circuit (9,11,12,13), through which water from the lower portion of the container can be caused to flow through heat exchanger means (12) arranged for heating up the water utilizing energy from a freely available source of energy and then back again to the upper portion of the container (2), and that the upper container (3) is connected to a circulation circuit through which water from the upper portion of this container is returned to its lower portion, when needed with the aid of pump means (15), via one or more heat dissipating means, there being arranged in the water volume of the upper container (3) a hot water supplier (18) supplied with water from a fresh water system (19) and provided with special heating means (17) from which supplier hot water can be tapped off, and that in the intermediate wall structure (5;21;31) there are first through-flow means (7;22;36) through which water from the upper portion of the lower container (2) can by thermosiphonic action or convection flow up into the upper container (3) and second through-flow means (8;23;37) through which water from the lower portion of the upper container (3) can flow down into the lower container (2).
Claim 2
Dependent Claim
284 words
A thermosiphonic boiler with two mutually communicating water containers (2,3), one (3) situated above the other (2), said containers housing water volumes which are thermically insulated from the surroundings of the boiler by means of heat insulation (4) in the walls of the boiler and respectively from each other by means of a heat insulating layer (6) in an intermediate wall structure (5;21;31), common to both containers, which separates their water volumes, characterized in that the lower container (2) is incorporated in an energy supply circuit (9,11,12,13), through which water from the lower portion of the container can be caused to flow through heat exchanger means (12) arranged for heating up the water utilizing energy from a freely available source of energy and then back again to the upper portion of the container (2), and that the upper container (3) is connected to a circulation circuit through which water from the upper portion of this container is returned to its lower portion, when needed with the aid of pump means (15), via one or more heat dissipating means, there being arranged in the water volume of the upper container (3) a hot water supplier (18) supplied with water from a fresh water system (19) and provided with special heating means (17) from which supplier hot water can be tapped off, and that in the intermediate wall structure (5;21;31) there are first through-flow means (7;22;36) through which water from the upper portion of the lower container (2) can by thermosiphonic action or convection flow up into the upper container (3) and second through-flow means (8;23;37) through which water from the lower portion of the upper container (3) can flow down into the lower container (2).
Claim 3
Dependent Claim
39 words
A thermosiphonic boiler as claimed in claim 1, characterized in that the through-flow means comprises a plurality of straight pipe stubs (7,8) extending with their outlet ends from the intermediate wall structure (5) a distance into the respective container.
Claim 4
Dependent Claim
68 words
A thermosiphonic boiler as claimed in claim 1 characterized in that the intermediate wall structure has the shape of a bell (21) or funnel with its narrower end facing upwards, the first through-flow means thereby comprising at least one opening (22) in the central portion of said narrower end, and the second through-flow means comprising openings or gaps (23) at the periphery of the intermediate wall structure (21).
Claim 5
Dependent Claim
68 words
A thermosiphonic boiler as claimed in claim 1 characterized in that the intermediate wall structure is made as a pressure vessel (31) adapted for preheating of the fresh water to the hot water supplier (18), and to which vessel an inlet pipe (19) for fresh water is connected and from which a supply pipe (34) for fresh water extends to the inlet connection of the hot water supplier.
Claim 6
Dependent Claim
117 words
A thermosiphonic boiler as claimed in claim 1, characterized in that the boiler (1) is provided with at least one closed heat pump circuit wherein are incorporated an evaporator (38), a compressor (39), a condenser (40) and a reduction valve (41) and that the evaporator (38) consists of a first pipe coil arranged in the lower container (2), the outlet portion of the coil being in communication with the compressor (39), the pressure side of which is connected with a second pipe coil arranged in the upper container (3) and constituting the condenser (40) said second pipe coil having an outlet portion in communication with the inlet portion of the evaporator (38) via the reduction valve (41).
Claim 7
Dependent Claim
32 words
A thermosiphonic boiler as claimed in claim 1, and thermostat controlled pumping means (10) to cause said water from said lower portion of said container to flow through said heat exchanger means.
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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |