Combination heat exchanger and blower
OwnerHenry F. Hope, Steven F. Hopeinventors
Life of this patent
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Abstract
A combination heat exchanger and blower unit suitable for connection into the breeching between a heater and the stack to admit hot flue gases into the unit. The flue gases enter a fan section wherein the hot flue gases and recirculated gases within the unit are accelerated by a fan. A helical coiled tube heat exchanger is positioned within the unit and is bombarded by the gases which are discharged by the fan. The turbulence created within the unit causes the heated gases to impact upon and to pass between the heat exchanger coils many times at high pressure. The repeated impacts of the heated gases upon the tube heat exchanger breaks down the boundary layer of stagnant gas surrounding the heat exchanger coils and results in greatly increased heat exchange efficiency.
Claims15
In a combination heat exchanger and blower apparatus having a housing defining a chamber, a hot gas inlet into the chamber, said gas inlet having guide means for directing the air flow into said chamber, a gas outlet from the chamber, a helical heat exchanger coil mounted inside the chamber and adapted to convey a heat exchange medium, and a fan having its impeller rotably mounted within the chamber, said impeller having a suction inlet for receiving a flow of gas, and a discharge outlet for discharging the gas in a lateral direction relative to the direction of gas flow into the suction inlet, the improvement comprising:
- a conduit within said housing interposed between said hot gas inlet and the suction inlet of the impeller, said conduit providing a passageway with an inlet adjacent and in alignment with the hot gas inlet into the chamber, and an outlet adjacent and in alignment with the suction inlet of the impeller, said passageway directing the flow of gases from the hot gas inlet directly to the suction inlet of the impeller,
- said discharge outlet of the impeller being unobstructed by the conduit for permitting gas to be laterally propelled from the impeller directly into the chamber;
- said heat exchanger coil being positioned about said conduit and said impeller to directly intercept the lateral flow of the propelled gas.
Dependencies are inferred from the claim text.