Stoves and furnaces – Hot-air furnaces – Compressed air
Patent
1978-04-17
1980-05-20
Davis, Albert W.
Stoves and furnaces
Hot-air furnaces
Compressed air
F24H 302
Patent
active
042034159
ABSTRACT:
A new and improved heat exchanger of the cross over type which facilitates heating an air flow directed either axially or transversely of the heat exchanger itself. The exchanger is comprised of an inner shell which defines a heating chamber for a fuel burner and an outer shell which is coaxially received over the inner shell in a radially spaced apart relationship therewith. The generally annular area between the inner and outer shells defines an air flow passage with the air flow to be heated being primarily conveyed through this air flow passage. A cross over member extends across the air flow passage to provide gaseous flow communication between the heating chamber and a gaseous flow chamber associated with the outer shell. This arrangement facilitates continuously conveying the products of combustion outwardly from the heating chamber. A thin air deflector surrounds the cross over member and is disposed in the air flow passage generally parallel to both the inner and outer shells. This air deflector acts as a heat sink and promotes laminar air flow around the cross over member. The outer shell also includes a pair of oppositely disposed elongated slot-like openings disposed in registry with at least a portion of the inner shell. The heat exchanger may be advantageously mounted either axially or transversely of an air flow to be heated. When axially mounted, at least a portion of the air flow is axially through the air flow passage and when transversely mounted, at least a portion of the air flow is transversely through the air flow passage between the slot-like openings in the outer shell.
REFERENCES:
patent: 3822991 (1974-07-01), Mutchler
patent: 3894526 (1975-07-01), Kofink
Gruber Thomas J.
Smith Harris W.
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