Vented, gas-fired air heater
First Claim
1. A gas burner including an enclosure defining a path for movement of combustion air, a pair of generally parallel burner plates disposed transverse to the path of combustion air travel, said burner plates being spaced apart to define a shallow chamber therebetween and both plates having a plurality of openings therein allowing for passage of combustion air therethrough, the openings in a first one of said plates being aligned with respective ones of the openings in the second plate to provide annular openings allowing exit of gaseous fuel from the shallow chamber, a conduit to supply gaseous fuel into the shallow chamber defined between said burner plates such that, in use, combustion air moving along the path and through the aligned openings in said burner plates mixes with gaseous fuel emerging from said chamber via said annular openings thereby to provide a combustible fuel-air mixture downstream of said burner plates.
1 Assignment
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Accused Products
Abstract
A vented, gas-fired air heater especially designed for temporary heating applications includes an improved burner design providing effective air and gas mixing and efficient burning in the combustion chamber. Highly efficient heat exchanger including corrugated heat exchanger panels provides enhanced heat transfer characteristics.
11 Citations
39 Claims
- 1. A gas burner including an enclosure defining a path for movement of combustion air, a pair of generally parallel burner plates disposed transverse to the path of combustion air travel, said burner plates being spaced apart to define a shallow chamber therebetween and both plates having a plurality of openings therein allowing for passage of combustion air therethrough, the openings in a first one of said plates being aligned with respective ones of the openings in the second plate to provide annular openings allowing exit of gaseous fuel from the shallow chamber, a conduit to supply gaseous fuel into the shallow chamber defined between said burner plates such that, in use, combustion air moving along the path and through the aligned openings in said burner plates mixes with gaseous fuel emerging from said chamber via said annular openings thereby to provide a combustible fuel-air mixture downstream of said burner plates.
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10. A gas burner comprising first and second spaced parallel burner plates defining a shallow chamber therebetween, each burner plate having a plurality of spaced apart extended openings therethrough defined by respective short tubular collars projecting therefrom with each of the tubular collars of the first plate being aligned with and directed toward and in confronting relation to a respective one of the tubular collars of the second plate such that annular gaps are defined between adjacent end portions of the tubular collars of the first and second plates;
- a conduit to supply gaseous fuel into said shallow chamber defined between said parallel plates such that, during use, the fuel passes through said annular gaps;
a burner blower to supply a flow of combustion air toward said plates to cause, during use, the air to move through the aligned extended openings in said plates and, in use, to mix with the gaseous fuel passing through said annular gaps to provide a combustible fuel-air mixture. - View Dependent Claims (11, 12, 13, 14, 15, 16)
- a conduit to supply gaseous fuel into said shallow chamber defined between said parallel plates such that, during use, the fuel passes through said annular gaps;
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17. A heat exchanger section comprising a pair of metal panels disposed in close face-to-face relation to allow gases to flow therebetween from an inlet end to an outlet end in a travel direction said panels each having undulations or corrugations therein whereby gases flowing between said panels in the travel direction are forced to move in a turbulent fashion to enhance transfer of heat between said panels and the flowing gases.
- 18. A heat exchanger section comprising a pair of metal panels disposed in close face-to-face relation to allow gases to flow therebetween from an inlet end to an outlet end in a travel direction, said panels each having corrugations therein angled relative to the travel direction and oppositely oriented with respect to each other such that adjacent corrugations are in a criss-cross relation to each other whereby gases flowing between said panels are forced by the opposing corrugations to move in the form of a series of repeating spirals from said inlet end to said outlet end.
- 22. An air heater comprising a main housing having an air inlet and an outlet for heated air, a combustion chamber located therein, a burner assembly connected to the combustion chamber to supply burning gases thereto, an exhaust stack, a heat exchanger connected to said combustion chamber and comprising a plurality of heat exchanger sections having inlet ends connected to receive heated combustion gases from the combustion chamber and outlet ends connected to said exhaust stack for exhausting combustion gases after passage through the heat exchanger sections, said heat exchanger sections being spaced apart to allow the passage of air therebetween to effect heating of same, and a blower assembly for moving cool air into said main housing via said air inlet and causing the air to travel between the heat exchanger sections and thence outwardly of said outlet for heated air.
- 27. An air heater comprising a main housing having an air inlet and an outlet for heated air, a combustion chamber located therein, a burner assembly connected to the combustion chamber to supply burning gases thereto, an exhaust stack, a heat exchanger connected to said combustion chamber and comprising a plurality of heat exchanger sections having inlet ends connected to receive heated combustion gases from the combustion chamber and outlet ends connected to said exhaust stack for exhausting combustion gases after passage through the heat exchanger sections, said heat exchanger sections being spaced apart to allow the passage of air therebetween to effect heating of same, and a blower assembly for moving cool air into said main housing via said air inlet and causing the air to travel between the heat exchanger sections and thence outwardly of said outlet for heated air, said burner assembly including an enclosure connected to the combustion chamber and defining a path for movement of combustion air toward the combustion chamber, a pair of generally parallel burner plates located in said enclosure and disposed transverse to the path of combustion air travel, said burner plates being spaced apart to define a shallow chamber therebetween and both plates having a plurality of openings therein allowing for passage of combustion air therethrough, the openings in a first one of said plates being aligned with respective ones of the openings in the second plate to provide annular openings allowing exit of gaseous fuel from the shallow chamber, a conduit to supply gaseous fuel into the shallow chamber defined between said burner plates such that, in use, combustion air moving along the path and through the aligned openings in said burner plates mixes with gaseous fuel emerging from said chamber via said annular openings thereby to provide a combustible fuel-air mixture downstream of said burner plates, which mixture, in use, is ignited to provide the supply of burning gases to said combustion chamber.
- 36. A gas burner including a pair of generally parallel burner plates adapted to be disposed transverse to a path of combustion air travel when in use, said burner plates being spaced apart to define a shallow chamber therebetween and both plates having a plurality of openings therein allowing for passage of combustion air therethrough, the openings in a first one of said plates being aligned with respective ones of the openings in the second plate, said openings in said plates being in the form of short tubular collars projecting from said plates with the tubular collars of both plates being aligned with and directed toward each other in confronting spaced apart relation to provide annular openings allowing exit of gaseous fuel between the confronting spaced apart collars, a conduit to supply gaseous fuel into the shallow chamber defined between said burner plates, such that, in use, combustion air moving along the path and through the aligned openings in said burner plates mixes with gaseous fuel emerging from said chamber via said annular openings thereby to provide a combustible fuel-air mixture downstream of said burner plates.
Specification