Heating boiler for liquid or gaseous fuels

Liquid heaters and vaporizers – Flue – Horizontal

Patent

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Details

122 52, F22B 700

Patent

active

042941989

ABSTRACT:
A heating boiler is provided which includes a water jacket including front and rear walls with fuel flues being employed in the boiler. A tube is provided which extends through the water jacket and extends through the front and rear walls and encloses the aforesaid flues as well as defining a combustion chamber and a collecting chamber. A sleeve is provided in the vicinity of the collecting chamber and the tube and sleeve are in such a relationship that one encircles the other. A gap is defined between the tube and sleeve at least one of which is provided with a bulge adjacent the gap to increase the size of the gap between the tube and sleeve. The outermost of the tube and sleeve members is connected in a thermally conductive manner with the rear wall of the water jacket, and a closure is provided with respect to either the tube or the sleeve to obturate the collecting chamber. In one embodiment, the sleeve encircles the tube, and, in another embodiment, the tube encircles the sleeve. One or both of these members may be provided with a bulge. In one embodiment of the invention, a thermally conductive connection is provided between the peripheral edge of the sleeve remote from the rear wall of the water jacket and the tube. The connection may otherwise be a contacting engagement capable of thermal conductivity. The flues in one embodiment of the invention are provided with slots to receive the sleeve and support the same.

REFERENCES:
patent: 2638878 (1953-05-01), Lemos, Jr. et al.
patent: 4169431 (1979-10-01), Viessmann

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