US 5,399,086 AGranted

Gas-fired air heater assembly

AssigneeCambridge Engineering, Inc.

InventorsGary J. Potter, Samuel M. Baxter

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Abstract

In a direct gas-fire heater assembly having a generally box-like housing with a grate-like floor with a conventional gas regulator, a gas port mounted within a box-like shroud, the shroud having one side with a predetermined number, shape and size of primary combustion air inflow orifices to direct primary combustion air toward the gas port. A burner is mounted on the shroud over the gas port. The area above the burner and adjacent to it contains an ignition device and flame sense rod as well as a pair of opposed and particularly oriented flame shields on each side of the flame orifice. One each of a pair of opposed baffle-type deflectors is arranged on each side and just above the flame shield so as to form a combustion chamber as well as a path for secondary air flow to a downstream chamber. An additional flame deflector is formed on one baffle-type deflector to deflect the flame toward the blower area.

Claims17

Dependent claims

In a direct gas-fired air heater having a housing, said housing having an access door, a burner assembly, means forming a combustion chambers in said housing, a blower, and a motor to power said blower, the improvement in the heater assembly comprising:

said means forming said combustion chamber including a plurality of baffles,
a burner having an open lower end, a gas inlet port communicating with said burner lower end, said burner operatively mounted over said gas inlet port and an upper end disposed to open into said combustion chamber;
a primary combustion air inlet means operatively connected to said lower end of said burner and having openings for the controlled inflow of primary combustion air so as to permit an appropriate amount of primary air inflow to promote effective combustion, but without disruption when the heater access door is opened and closed,
said burner having an open upper end cooperatively connected to said combustion chamber, a first and second opposed shields, one of each said shields being disposed on each side of said open upper end of said burner so as to direct a flame emitted from said upper end of said burner into said combustion chamber;
a first of said baffles, disposed on a side of the first shield forming an air channel intermediate said first deflector and said shield to direct secondary combustion air toward an end of said combustion chamber;
a second baffle-type baffle disposed also on a side of said second shield forming an air channel intermediate said shield deflector and said second shield to direct secondary air toward said end of said combustion chamber;
a flame deflector formed on said second deflector having a inwardly projecting extension thereon to deflect said flame heat into a second chamber proximate said blower.

4 more elements

In a direct gas-fire heater assembly for use in an agricultural and related building having a housing, a burner assembly, a blower assembly, a motor to power said blower, and a combustion chamber within said housing, the improvement in the heater assembly comprising:

a burner having a first end with a first opening formed therein and second end with a second opening formed therein, said first opening disposed to house a combustible gas port and said second opening disposed to allow the outflow of a gas for forming a proximate combustible flame;
means for controlling the inflow of primary air for combustion operatively attached to said first opening of said burner;
a first deflector shield disposed on a first side of said gas outflow opening, and a second deflector shield disposed on a second side of said gas outflow opening, said first and second shields positioned so as to deflect said flame toward a combustion chamber;
a first and second baffle-type deflectors, said first baffle-type deflector being mounted proximate said first shield creating a secondary combustion air inflow path intermediate said first shield and first deflector, said second baffle-type deflector mounted proximate said second shield creating a secondary combustion air inflow channel between said second shield and said second deflector;
an inwardly projecting extension on said first baffle-type deflector disposed to deflect a flame from said combustion chamber toward such blower.

2 more elements

Dependencies are inferred from the claim text.