US 5,947,717 AGranted

Vaporizing combustion chamber for a heater running on liquid fuel

AssigneeJ. Eberspächer GmbH & Co. KG

InventorsPeter Steiner, Michael Humburg

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Abstract

A vaporizing combustion chamber for a heater running on liquid fuel, in particular a vehicle heater, in which inter alia two pipes disposed concentrically one inside the other form therebetween an annular chamber which is closed at a first end. At the second end, the annular chamber is open and leads into a flame diaphragm which projects radially inwards from the outer pipe and is located at a spacing in front of the inner pipe. At both its ends the inner pipe is substantially open and the opening at the second end is contracted by a concentric baffle edge of a baffle plate. In order to improve the emission values of the combustion chamber exhaust gas and reduce combustion noises both when the combustion chamber is disposed horizontally and when it is disposed vertically, the opening in the flame diaphragm is eccentric to the opening, in the inner pipe, formed by the baffle edge of the baffle plate. The radially larger wall surface of the flame diaphragm is in the vicinity of the fuel-introduction point on the periphery.

Claims9

Dependent claims

A vaporizing combustion chamber comprising:

an outer tube with a first and second end;
an inner tube positioned concentrically with said outer tube, said inner tube defining open first and second ends, said inner tube also defining a plurality of slots adjacent said second end of said inner tube, said inner and outer tubes defining an annular space between said inner and outer tubes, said annular space being closed at a first end adjacent said first end of said inner tube, said annular space being open at a second end adjacent said second end of said inner tube;
a baffle plate connected to said open second end of said inner tube, said baffle plate defining an axial opening reducing a size of said open second end, said inner tube guiding combustion air from said first open end of said inner tube through said inner tube and partly through said slots and partly through said axial opening;
a flame orifice wall extending radially inward from said second end of said outer tube and spaced from said second end of said inner tube, said flame orifice wall defining a flame orifice opening positioned eccentrically to said axial opening of said baffle plate, said flame orifice wall having an enlarged radial section;
a porous absorbent body connected to an inner surface of said outer tube;
fuel admission means for admitting fuel to said porous absorbent body in a punctiform manner at a locally limited point of admission adjacent to said first end of said outer tube and said radially enlarged section of said flame orifice wall;
a flame tube positioned adjacent said flame orifice wall for receiving a flame from said flame orifice opening.

4 more elements

Dependencies are inferred from the claim text.