Stoves and furnaces – Hot-air furnaces – Compressed air
Patent
1977-04-20
1978-08-22
Wayner, William E.
Stoves and furnaces
Hot-air furnaces
Compressed air
F24H 306
Patent
active
041081439
ABSTRACT:
This invention relates to a skid-mounted portable heater blower unit for use on the surface to supply high temperature hot air to subsurface installations for the purpose of shrinking heat shrinkable sleeves around splices or other repairs made in underground cable, such heater being characterized by a serially-ducted preheater which draws ambient air in from the outside and warms it by passing it through the ducts back and forth four times in heat exchange relation to the hot products of combustion exiting the unit along the outside of an internal combination combustion chamber and final stage heat exchanger. The preheated air from the final pass through the preheater enters the secondary stage heat exchanger and follows a helical path around the outside of the combustion chamber while flowing in concurrent relation to the flame inside thereof and countercurrently to the products of combustion exiting around the outside. The air thus heated is preferably given one last charge of heat by passing it in heat exchange relation to the hot gaseous products of combustion just as they leave the combustion chamber and begin their migration along the outside of the secondary stage heat exchanger.
REFERENCES:
patent: 3267928 (1966-08-01), Spooner
patent: 3267929 (1966-08-01), Damon
patent: 3822690 (1974-07-01), Kofink
patent: 3916870 (1975-11-01), Beavers
patent: 4034734 (1977-07-01), Birney
Beavers Allan E.
Pelsue Bradley A.
Spangler, Jr. Edwin L.
T.A. Pelsue Company
Tapolcai, Jr. William E.
Wayner William E.
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