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US 4,590,888 AGranted
Water heater
AssigneeWebasto-Werk W. Baier GmbH & Co.
InventorErnst Mosig
Life of this patent
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AssigneeWebasto-Werk W. Baier GmbH & Co.
InventorErnst Mosig
Estimating the term…
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.
A water heater for a vehicle having a burner unit and a combustion chamber surrounded by a heat exchanger in a manner defining an annular out-flow space therebetween through which combustion gases flow to an exhaust outlet after emerging from the combustion chamber and being deflected in an opposite direction, said heat exchanger having an internal ring-shaped space through which a liquid heat transfer medium is circulated that is formed by an inner casing and an outer casing with an inlet piece and an outlet piece;
Dependencies are inferred from the claim text.