Burner and mobile heating device

Abstract

A burner for a mobile fuel-operated heating device, in particular for a vehicle heating device, comprising:—an evaporator receiving body for receiving an evaporator assembly for distributing and evaporating liquid fuel and—at least one fuel supply line for supplying liquid fuel to the evaporator assembly, wherein the burner has a circumferential wall with a plurality of air supply openings, and the air supply openings are arranged in at least one row, said row extending in particular in the circumferential direction. The air supply openings in the at least one row comprise at least one first air supply opening with a first opening longitudinal axis, a first inlet surface, and a first outlet surface and at least one second air supply opening with a second opening longitudinal axis, a second inlet surface, and a second outlet surface The first opening longitudinal axis forms a first angle α 1 relative to a circumferential wall normal of the first air supply opening, and the second opening longitudinal axis forms a second angle α 2 relative to a circumferential wall normal of the second air supply opening.

1 . A burner for a mobile fuel-operated vehicle heating device, comprising
 an evaporator receiving body for receiving an evaporator assembly for distributing and evaporating liquid fuel, and   at least one fuel supply line for supplying liquid fuel to the evaporator assembly,   wherein the burner has a circumferential wall with a plurality of air supply openings, the air supply openings being arranged in at least one row extending in a circumferential direction,   wherein the air supply openings in the at least one row comprise at least one first air supply opening with a first opening longitudinal axis, a first inlet surface and a first outlet surface, and at least one second air supply opening with a second opening longitudinal axis, a second inlet surface and a second outlet surface,   wherein the first opening longitudinal axis forms a first angle α 1  to a circumferential wall normal to the first air supply opening, and   wherein the second opening longitudinal axis forms a second angle α 2 , different from the first angle α 1 , to a circumferential wall normal to the second air supply opening.   
     
     
         2 . The burner according to  claim 1 , wherein the first angle α 1  and/or the second angle α 2  are selected such that the first inlet surface and the first outlet surface or the second inlet surface and the second outlet surface, respectively, at least partially overlap in the projection direction of the circumferential wall normal. 
     
     
         3 . The burner according to  claim 1 , wherein the air supply openings are arranged along at least two rows in the circumferential direction of the circumferential wall, each row comprising at least one first air supply opening and one second air supply opening. 
     
     
         4 . The burner according to  claim 1 , wherein the first angle α 1  and/or the second angle α 2  are at most 40°, and/or wherein exclusively the first angle α 1  is 0°. 
     
     
         5 . The burner according to  claim 1 ,
 wherein the first angle α 1  and/or the second angle α 2  lie in a plane spanned by the circumferential wall normal and a circumferential direction at the location of the respective air supply opening, and/or wherein the first angle α 1  and/or the second angle α 2  lie in a plane spanned by the respective row, or   wherein the first angle α 1  and/or the second angle α 2  lie in a plane spanned by the circumferential wall normal at the location of the respective air supply opening and a central axis of the circumferential wall, or   wherein the first angle α 1  and/or the second angle α 2  are oblique to a plane spanned by the circumferential wall normal and a circumferential direction at the location of the respective air supply opening, and/or wherein the first angle α 1  and/or the second angle α 2  are oblique to a plane spanned by the respective row.   
     
     
         6 . The burner according to  claim 1 , wherein the air supply openings further comprise third air supply openings or third and fourth air supply openings having a third angle α 3  and optionally fourth angle α 4  different from the first angle α 1  and the second angle α 2 , or wherein the air supply openings comprise a plurality of air supply openings having different angles. 
     
     
         7 . The burner according to  claim 1 , wherein air supply openings adjacent at least in the circumferential direction, in particular adjacent air supply openings, are air supply openings with different angles. 
     
     
         8 . The burner according to  claim 1 , wherein the air supply openings are arranged along the circumferential direction in a periodic pattern, wherein in particular all rows of air supply openings have the same pattern. 
     
     
         9 . The burner according to  claim 1 , wherein the air supply openings are arranged at an equal distance along the circumferential direction. 
     
     
         10 . The burner according to  claim 1 , wherein the thickness of the circumferential wall at least in the region of a part of the air supply openings differs from the thickness of the remaining circumferential wall. 
     
     
         11 . The burner according to  claim 1 , wherein the circumferential wall is arranged on an evaporator receiving body having a bottom region. 
     
     
         12 . A mobile vehicle heating device, comprising a burner according to  claim 1 . 
     
     
         13 . A method of manufacturing a burner according to  claim 1 , comprising,
 providing a circumferential wall,   selecting a first angle α 1  for first air supply openings depending on the thickness (t) of the circumferential wall,   selecting a second angle α 2  for second air supply openings depending on the thickness (t) of the circumferential wall-,   arranging and inserting the first and second air supply openings in the circumferential wall.   
     
     
         14 . The burner according to  claim 1  wherein the air supply openings are arranged two to four rows in the circumferential direction of the circumferential wall, each row comprising at least one first air supply opening and one second air supply opening.