US 4,055,055 AGranted

Thermosiphonic boiler

OwnerLudvig L. Horwitzinventor

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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.

Claims6

Dependent claims

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).

Dependencies are inferred from the claim text.