Water heater

Details Water heater Water heater

1984-12-18

1986-05-27

Makay, Albert J.

Liquid heaters and vaporizers

Flue

Horizontal

122 23, 122135F, 122136R, 122182S, 126350R, 165905, 237 123C, F22B 712

Patent

active

045908885

ABSTRACT:
A water heater having a burner unit and a combustion chamber from which the combustion gases are discharged and deflected into an annular out-flow space through which they flow along a heat exchanger to an exhaust outlet in the area of the burner unit. The outer casing of the heat exchanger is made of plastic and together with a metal inner casing define a ring-shaped space through which water flows as a liquid heat transfer medium. The outer casing made of plastic is connected with the inner casing made of metal in a gas-tight and pressure-resistant way that is also stable with respect to temperature changes. The result is a reduction in weight of the water heater because of the formation of the outer casing of plastic, and the efficiency of the water heater can be improved by the fact that the losses through heat radiating from the outer casing can be reduced.

REFERENCES:
patent: 3489209 (1970-01-01), Johnson
patent: 3776199 (1973-12-01), Miller
patent: 3779229 (1973-12-01), Volbehr
patent: 3822690 (1974-07-01), Kofink
patent: 4192259 (1980-03-01), Viesmann
patent: 4395225 (1983-07-01), Mittmann
patent: 4421069 (1983-12-01), Diggins
patent: 4433645 (1984-02-01), Smith

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