Gas fired heat exchanger for hot water with bimetallic scouring

Details Gas fired heat exchanger for hot water with bimetallic scouring Gas fired heat exchanger for hot water with bimetallic scouring

1986-03-21

1987-06-09

Favors, Edward G.

Liquid heaters and vaporizers

Stand boiler

Fluid fuel burner

122 14, 122 44A, 122155A, 122379, 165 94, 165 95, 1651091, F22B 502

Patent

active

046712127

ABSTRACT:
A gas fired hot water heater includes a housing enclosing an internal chamber divided by a vertical partition into two compartments, the partition having a top edge spaced below the top of the chamber. One of the compartments has a gas burner in the lower portion with an adjacent combustion air intake vent. A first heat exchanger is located in the same compartment above the gas burner but below the top edge of the partition, and a second heat exchanger is located in the other compartment at substantially the same horizontal level as the first. The two heat exchangers are connected in series. Condensate collection means is provided in the other compartment below the second heat exchanger to collect condensate forming on the second heat exchanger and to duct the condensate out of the housing. A flue pipe ducts flue gases from the housing, and a blower is provided to blow the flue gases through the flue pipe. In a particular development, a bimetallic, helically twisted baffle is provided within the straight portions of the central heat exchanger tube, so that temperature swings will cause the bimetallic baffle to expand and contract, thus automatically scouring the internal surface of the tubes, and reducing deposits.

REFERENCES:
patent: 4471725 (1984-09-01), Holden
patent: 4557220 (1985-12-01), Jannemann et al.
patent: 4559998 (1985-12-01), Counterman
patent: 4564066 (1986-01-01), Gorman

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