Vehicle heater

1. A vehicle heater comprising:

a combustion chamber assembly unit to be fed with fuel and combustion air;

a housing with a circumferential wall defining a combustion air flow space;

a combustion air blower with a blower housing adjoining an end face of the circumferential wall of the housing in a direction of a housing longitudinal axis, the combustion air blower for delivering combustion air into the combustion air flow space;

a fuel feed line adjoining the combustion chamber assembly unit for feeding fuel to the combustion chamber assembly unit, wherein a fuel feed line passage opening is provided in the circumferential wall, which fuel feed line passage opening is open towards the end face of the circumferential wall; and

a sealing formation with a first sealing formation area arranged between the end face of the circumferential wall and the blower housing for establishing an essentially fluid-tight closure between the end face of the circumferential wall and the blower housing, and with a second sealing formation area positioned such that the second sealing formation area meshes with the fuel feed line passage opening to establish an essentially fluid-tight closure between the circumferential wall and the fuel feed line, wherein the sealing formation comprises a sealing element providing the first sealing formation area and the second sealing formation area as integral components thereof.

2. The vehicle heater in accordance with claim 1 , wherein the first sealing formation area comprises a ring-shaped configuration adapted to a circumferential contour of the circumferential wall.

3. The vehicle heater in accordance with claim 2 , wherein:

the second sealing formation area extends from the first sealing formation area, projecting essentially in the direction of the housing longitudinal axis and meshing with the fuel feed line passage opening, and

the second sealing formation area comprises an outer circumferential contour adapted to a contour of the fuel feed line passage opening.

4. The vehicle heater in accordance with claim 3 , wherein:

a buffer chamber is provided on the housing in an area of the fuel feed line passage opening on an outer side of the circumferential wall;

the buffer chamber is open at the end face of the circumferential wall in the direction of the housing longitudinal axis and is defined radially inwardly by the circumferential wall and is defined radially outwardly and in the circumferential direction by a buffer chamber wall adjoining the circumferential wall;

the buffer chamber wall has an opening through which the fuel feed line passes; and

the second sealing formation area establishes an essentially fluid-tight closure between the buffer chamber and the combustion air flow space in an area of the circumferential wall.

5. The vehicle heater in accordance with claim 4 , wherein:

the sealing formation further has a third sealing formation area; and

the third sealing formation area is arranged between the buffer chamber wall and the blower housing to establish an essentially fluid-tight closure between the buffer chamber wall and the blower housing.

6. The vehicle heater in accordance with claim 5 , wherein the sealing element provides the third sealing formation area.

7. The vehicle heater in accordance with claim 1 , wherein:

the second sealing formation area extends from the first sealing formation area, projecting essentially in the direction of the housing longitudinal axis and meshing with the fuel feed line passage opening, and

the second sealing formation area comprises an outer circumferential contour adapted to a contour of the fuel feed line passage opening.

8. The vehicle heater in accordance with claim 1 , wherein the second sealing formation area has an opening through which the fuel feed line passes.

9. The vehicle heater in accordance with claim 1 , wherein:

a buffer chamber is provided on the housing in an area of the fuel feed line passage opening on an outer side of the circumferential wall;

the buffer chamber is open at the end face of the circumferential wall in the direction of the housing longitudinal axis and is defined radially inwardly by the circumferential wall and is defined radially outwardly and in the circumferential direction by a buffer chamber wall adjoining the circumferential wall;

the buffer chamber wall has an opening through which the fuel feed line passes; and

the second sealing formation area establishes an essentially fluid-tight closure between the buffer chamber and the combustion air flow space in an area of the circumferential wall.

10. The vehicle heater in accordance with claim 9 , wherein:

the sealing formation further has a third sealing formation area; and

the third sealing formation area is arranged between the buffer chamber wall and the blower housing to establish an essentially fluid-tight closure between the buffer chamber wall and the blower housing.

11. The vehicle heater in accordance with claim 10 , wherein the sealing element provides the third sealing formation area.

12. The vehicle heater in accordance with claim 1 , wherein the sealing element is made of an elastomeric material.

13. The vehicle heater in accordance with claim 1 , wherein the housing is a part of a heat exchanger housing and that the combustion chamber assembly unit is carried on a bottom area of the heat exchanger housing.

14. A vehicle heater comprising:

a circumferential wall defining a combustion air flow space, said circumferential wall having an axial end defining an axial opening, said circumferential wall defining a fuel line opening in a circumferential surface of said circumferential wall, said fuel line opening being open at said axial end of said circumferential wall;

a combustion air blower with a blower housing mounted on said axial end of said circumferential wall, said combustion air blower being configured to deliver combustion air into said combustion air flow space;

a fuel line passing through said fuel line opening in said circumferential wall;

a seal having a first area arranged between said axial end of said circumferential wall and said blower housing, said seal having a second area configured to mesh with said fuel line opening to establish an essentially fluid-tight closure between said circumferential wall and said fuel line, said seal being one piece providing said first area and said second area as integral components thereof.

15. A heater in accordance with claim 14 , wherein:

said circumferential wall has an end face at said axial end, said end face being around said axial opening;

said fuel line opening is configured to open into said end face of said circumferential wall.

16. A heater in accordance with claim 14 , wherein:

said circumferential wall has an end face at said axial end, said end face being around said axial opening;

said fuel line opening is configured to open in a direction of said end face of said circumferential wall.

17. A heater in accordance with claim 14 , wherein:

said circumferential wall has an end face at said axial end, said end face being around said axial opening;

said fuel line opening is configured to be axially open in a direction of said end face of said circumferential wall.