Heating – Heat generator heats gas or liquid material in a flow structure – Material heated by mixing with combustion products of generator
Patent
1980-09-22
1982-04-13
Camby, John J.
Heating
Heat generator heats gas or liquid material in a flow structure
Material heated by mixing with combustion products of generator
431116, 432 72, 432222, F24H 100
Patent
active
043245455
ABSTRACT:
A recirculating processing oven heater (10) disclosed includes first and second flow paths (22,26) with an internal heat exchanger (36) located downstream from a burner (24) and upstream from a conical mixing member (28) that deflects gas from the first path outwardly for mixing with bypass gas that flows along the second path. Thermal incineration of unburned combustible gases takes place along the first path (22) after heating thereof by the burner and prior to passage thereof through the internal heat exchanger (36). Heat extracted by the internal heat exchanger (36) is supplied to the upstream end of one of the flow paths (22,26), preferably the first flow path (22) so as to provide most efficient operation of the heater. An internal control valve (58) positioned between the internal heat exchanger (36) and the mixing member (28) along the first path controls the relative rate of gas flow along each path under the impetus of a suction blower (34) within a mixing chamber (32) downstream from the mixing member. A fresh air inlet (62) to the mixing chamber (32), an exhaust gas outlet (64) adjacent the internal control valve (58), and a secondary heat exchanger (70) with an associated control valve (78) coupled to the internal control valve (58) cooperate to provide efficient operation of the heater.
REFERENCES:
patent: 2985438 (1961-05-01), Prowler
patent: 3146821 (1964-09-01), Wuetig
patent: 3604824 (1971-09-01), Hardison
patent: 4098567 (1978-07-01), Hubbert
patent: 4255132 (1981-03-01), Carthew
Camby John J.
Gladd Industries, Inc.
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