Fuel burning furnace
OwnerRajendra K. Naranginventor
Life of this patent
Estimating the term…
Abstract
A fuel burning furnace includes a number of energy efficient features. The furnace includes a heat exchanger in which combustion air is preheated by hot discharge gases. Diverters are provided in the heat exchanger to continually urge hot combustion gases toward the interior portions of the heat exchanger to improve its heat transfer characteristics. The furnace incorporates a number of features to determine malfunction and indicate inefficient operation. A humidification control system for the humidification or dehumidification of circulated air also is provided. The furnace also includes a blower motor system which compensates for loss of tension in driving belts and makes correction for blower speed in response to temperature variations.
Claims39
A furnace comprising a plurality of longitudinally extending burners for use in burning fuel to form hot combustion gases which rise upwardly along the length of said burners, and a plurality of generally upright heat exchange enclosures having sidewalls which form upwardly extending combustion gas chambers for receiving hot combustion gases from each of said burners, said sidewalls of said heat exchange enclosures being disposed in a side-by-side relationship with space between outer side surfaces of said sidewalls to form a plurality of spaced apart flow paths for air to be heated by exposure to outer side surfaces of said sidewalls, each of said burners being partially enclosed by each of said heat exchange enclosures to enable each of said heat exchange enclosures to conduct hot combustion gases upwardly from each of said burners to heat said sidewalls of each of said heat exchange enclosures, each of said burners having a longitudinal central axis which extends transversely to the sidewalls of said heat exchange enclosures and extends through each of the combustion gas chambers.
In a furnace, the combination comprising:
- (a) a burner for burning combustible fuel to produce hot combustion gases;
- and
- (b) a heat exchanger including:
- (i) a generally rectangular enclosure, said generally rectangular enclosure having interior surfaces of the enclosure in heat exchange relation with the hot combustion gases, and the exterior surfaces of the enclosure being in heat exchange relation with air to be heated;
- and
- (c) means disposed within the enclosure for urging the hot combustion gases toward the interior surfaces of the enclosure to maximize the heat transfer, said means for urging hot combustion gases toward the interior surfaces of the heat exchange enclosure includes a longitudinally extending baffle plate disposed between the interior surfaces of the enclosure and a V-shaped baffle, said V-shaped baffle being disposed at the upper end of said baffle plate to direct the hot combustion gases toward the interior surfaces of the enclosure after combustion.
Dependencies are inferred from the claim text.