Exhaust pipe heat exchanger
OwnerRonald B. Pranaitisinventor
Life of this patent
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Abstract
One exchanger unit comprises a length of exhaust pipe tube having a plurality of smaller heat exchange tubes which extend diametrically through the exhaust pipe tube. Each of the heat exchange tubes is canted slightly longitudinally of the exhaust pipe tube and the heat exchange tubes are disposed in a helical configuration to force the exhaust gases to swirl through the exhaust pipe tube. The heat exchanger units can be disposed in a furnace exhaust pipe or can be arranged between inlet and outlet plenums which are connected in a furnace exhaust pipe or the like.
Claims15
A heat exchange unit for connection in the exhaust line of a fuel burning apparatus comprising:
- an elongated tubing section having an inlet end and an outlet end;
- a plurality of exchange tubes disposed between an inlet plenum and an outlet plenum, each of said exchange tubes being further disposed transversely through said elongated tubing section with said exchange tubes, being spaced longitudinally of said tubing section, and further wherein adjacent ones of said exchange tubes are offset with the ends of said exchange tubes being disposed in a helical conformation longitudinally of the tubing section, and second heat exchange tubes being disposed transversely of each of said inlet and outlet plenums.
A heat exchanger for transferring heat from exhaust gases to ambient air within a room, comprising:
- an inlet plenum having an exhaust gas inlet;
- an outlet plenum having an exhaust gas outlet;
- a plurality of heat exchange units disposed between said inlet plenum and said outlet plenum;
- a plurality of first exchange tubes passing transversely through at least one of said inlet plenum and outlet plenum;
- and a plurality of second exchange tubes passing transversely through each of said heat exchange units, adjacent ones of said second heat exchange tubes being spaced in a helical conformation on each of said heat exchange units.
Dependencies are inferred from the claim text.