Dual flow heating apparatus

A forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto, comprising heater means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heated air stream from said heater means into said heating compartment at a second location, an air fan means located in said heating compartment and having a first means operable to forcibly draw said heated air stream into contacting therewith at its entry into said heating compartment and having a second means operable to establish a recirculated forced air flow internally within said heating compartment without entry of said internal forced air flow into said air conduit, said first and second air fan means enabling mixing of said heated air stream with said internal forced air flow, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.

In a forced air heating apparatus having an outer housing formed of a plurality of connected side, bottom, top and rear walls, and having an open front heating compartment contained therein and spaced from at least one wall of said outer housing to form an air conduit enabling circulation of a heated air stream between said outer housing and said heating compartment, and having a cover door arranged to close the open front of said heating compartment;

• the improvement comprising:
• a dual air flow fan rotatably supported within said heating compartment, said fan having means for drawing two air streams thereinto along opposite axial directions and for impelling both air streams centrifugally away from said fan during rotation thereof to enable mixing of said two air streams within said heating compartment, said air flow fan enabling establishment of a recirculated forced air flow internally within said heating compartment and enabling the drawing of said heated air stream from said air conduit into a portion of said heating compartment.

A dual air flow fan for circulation of heated air in a forced air heating apparatus having a separate heating compartment and an associated air conduit means having an entry connected thereto for enabling an inflow of heated air, said air flow fan located within said heating compartment at the entry of said air conduit means thereto, said dual air flow fan comprising a shaft collar, a circular center plate rigidly connected to said shaft collar, a first and a second set of impeller blades affixed perpendicularly on opposite edge portions of said center plate, said impeller blades curved with respect to the direction of rotation to enable centrifugal ejection of two air streams, one flowing along the fan axis in a first direction and a second flowing along the fan axis in an opposite direction both inwardly toward said center plate, said first set of impeller blades operable for drawing a heated air stream through the entry of said associated air conduit means and into contact therewith along the fan axis at the entry of the air stream into said separate heating compartment, said second set of impeller blades operable for forcibly recirculating heated air within said heating compartment, said dual air flow fan enabling the simultaneous inflow and outward mixing of two air streams at the peripheral edge thereof.

In a forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto;

• the improvement comprising heater means disposed within said conduit means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heated air stream from said heater means into said heating compartment at a second location, air flow means for enabling establishment of a recirculated forced air flow internally within said heating compartment and for drawing said heated air stream into a portion of said heating compartment without entry of said internal forced air flow into said air conduit, an air valve means located within said air conduit means to enable variable flow of said heated air stream into said heating compartment, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.

In a forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto;

• the improvement comprising heater means disposed within said conduit means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heated air stream from said heater means into said heating compartment at a second location, air flow means for enabling establishment of a recirculated forced air flow internally within said heating compartment and for drawing said heated air stream into a portion of said heating compartment without entry of said internal forced air flow into said air conduit, said air flow means comprising a dual air flow fan rotatably supported within a portion of said heating compartment, and said fan having means for drawing two air streams thereinto along opposite axial directions and for impelling both air streams centrifugally away from said fan during rotation thereof, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.

A forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto, comprising heater means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heated air stream from said heater means into said heating compartment at a second location, air flow means for enabling establishment of a recirculated forced air flow substantially internally within said heating compartment and for drawing said heated air stream into a portion of said heating compartment without entry of said internal forced air flow into said air conduit means, an air valve means located within said air conduit means to enable variable flow of said heated air stream into said heating compartment, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.

In a forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto;

• the improvement comprising heater means disposed within said conduit means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heated air stream from said heater means into said heating compartment at a second location, air flow means for enabling establishment of a recirculated forced air flow internally within said heating compartment and for drawing said heated air stream into a portion of said heating compartment without entry of said internal forced air flow into said air conduit, said air flow means comprising an air fan rotatably supported within said heating compartment, and said air fan having means for drawing two air streams thereinto along opposite axial directions and for centrifugally ejecting and mixing the two air streams within said heating compartment, said two air streams comprising said heated air stream and said recirculated forced air flow, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.

In a forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto;

• the improvement comprising heater means disposed within said conduit means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heated air stream from said heater means into said heating compartment at a second location, air flow means for enabling establishment of a recirculated forced air flow internally within said heating compartment and for drawing said heating air stream into a portion of said heating compartment without entry of said internal forced air flow into said air conduit, a divider baffle positioned parallel to and spaced from a wall of said heating compartment, said air flow means comprising an air fan having its plane of rotation disposed parallel to said divider panel and being rotatably supported within said heating compartment, and said air fan having means for drawing two air streams thereinto along opposite axial directions and for centrifugally ejecting and mixing the two air streams within said heating compartment in the space between said divider baffle and said heating compartment wall, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.

In a forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto;

• the improvement comprising heater means disposed within said conduit means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heater air stream from said heater means into said heating compartment at a second location, air flow means for enabling establishment of a recirculated forced air flow internally within said heating compartment and for drawing said heated air stream into a portion of said heating compartment without entry of said internal forced air flow into said air conduit, said air conduit means connected to a heat collector duct at a position contiguous to said second location, and said heat collector duct enabling circulation of said heated air stream into said air flow means, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.

In a forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto;

• the improvement comprising heater means disposed within said conduit means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heated air stream from said heater means into said heating compartment at a second location, air flow means for enabling establishment of a recirculated forced air flow internally within said heating compartment and for drawing said heated air stream into a portion of said heating compartment without entry of said internal forced air flow into said air conduit means, said air conduit means comprising flueways located adjacent to a plurality of the outer walls of said heating compartment and a heated air chamber connected to said flueways and extending therefrom into said second location for enabling heat exchange from said flueways and from said heated air chamber into said heating compartment indirectly through the walls thereof, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.

A forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto, comprising heater means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heated air stream from said heater means into said heating compartment at a second location, air flow means for enabling establishment of a recirculated forced air flow substantially internally within said heating compartment and for drawing said heated air stream into a portion of said heating compartment without entry of said internal forced air flow into said air conduit means, said air flow means comprising an air fan rotatably supported within said heating compartment, and said air fan having means for drawing two air streams thereinto in opposite axial directions and for centrifugally ejecting and mixing the two air streams within said heating compartment, said two air streams comprising said heated air stream and said recirculated forced air flow, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.

A forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto, comprising heater means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heated air stream from said heater means into said heating compartment at a second location, air flow means for enabling establishment of a recirculated forced air flow substantially internally within said heating compartment and for drawing said heated air stream into a portion of said heating compartment without entry of said internal forced air flow into said air conduit means, said air conduit means connected to a heat collector duct at a position contiguous to said second location, and said heat collector duct enabling circulation of said heated air stream into said air flow means, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.

A forced air heating apparatus having a heating compartment and an associated air conduit means connected thereto, comprising heater means for heating an intake ambient air stream drawn into said conduit means at a first location, said conduit means enabling transport of a heated air stream from said heater means into said heating compartment at a second location, air flow means for enabling establishment of a recirculated forced air flow substantially internally within said heating compartment and for drawing said heated air stream into a portion of said heating compartment without entry of said internal forced air flow into said air conduit means, said air conduit means comprising flueways located adjacent to a plurality of the outer walls of said heating compartment and a heated air chamber connected to said flueways and extending therefrom into said second location for enabling heat exchange from said flueways and from said heated air chamber into said heating compartment indirectly through the walls thereof, and vent means formed in said heating compartment to enable the outflow of heated air from said heating compartment.