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 α1 relative to a circumferential wall normal of the first air supply opening, and the second opening longitudinal axis forms a second angle α2 relative to a circumferential wall normal of the second air supply opening.

Claims

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 α1 to a circumferential wall normal to the first air supply opening, and wherein the second opening longitudinal axis forms a second angle α2, different from the first angle α1, to a circumferential wall normal to the second air supply opening.

2. The burner according to claim 1, wherein the first angle α1 and/or the second angle α2 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 α1 and/or the second angle α2 are at most 40°, and/or wherein exclusively the first angle α1 is 0°.

5. The burner according to claim 1, wherein the first angle α1 and/or the second angle α2 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 α1 and/or the second angle α2 lie in a plane spanned by the respective row, or wherein the first angle α1 and/or the second angle α2 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 α1 and/or the second angle α2 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 α1 and/or the second angle α2 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 α3 and optionally fourth angle α4 different from the first angle α1 and the second angle α2, 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 α1 for first air supply openings depending on the thickness (t) of the circumferential wall, selecting a second angle α2 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.

Description

[0034] The disclosure is also explained in more detail below with respect to further features and advantages by means of the description of embodiment examples and with reference to the accompanying drawings. It shows in each case in a principle drawing:

[0035] FIG. 1 first view of an evaporator receiving arrangement;

[0036] FIG. 2 second view of the evaporator receiving arrangement of FIG. 1;

[0037] FIG. 3 cut along a row of air supply openings of one embodiment;

[0038] FIG. 4 cut along a row of air supply openings of an alternative embodiment;

[0039] FIG. 5 partial cut perpendicular to a row of air supply openings of one embodiment,

[0040] FIG. 6 partial cut perpendicular to a row of air supply openings of an alternative embodiment.

[0041] FIG. 1 shows a first view of an evaporator receiving body 2 and a fuel supply line 4. The evaporator receiving body 2 has a bottom region 6. The fuel supply line 4 opens into the bottom region 6. The fuel supply line 4 can, for example, be designed as a tube. In the illustrated representation, the bottom region 6 has a recess which is suitable for receiving an evaporator assembly, in particular the evaporator.

[0042] A circumferential wall 8 extends from the bottom region 6. The circumferential wall is cylindrical in sections and conical in sections. An exclusively cylindrical design is also possible as an alternative. In a lower section of the circumferential wall, i.e. close to the bottom region 6, a receiving element 10 is arranged, which is suitable for receiving an ignition element and/or a flame guard. The height of the receiving element 10, measured from the bottom region, is in particular adapted to the size of the evaporator assembly.

[0043] A plurality of air supply openings 12 are provided in the circumferential wall 8. In the example shown, the air supply openings 12 are arranged in two rows 20, 22 in the circumferential direction. However, arrangement in only one row or in multiple rows is also possible. In FIG. 1, the number of air supply openings 12 in the row 20 is greater than in the row 22, which is also visible in particular in the view according to FIG. 2. In the row 20, moreover, the distance between the air supply openings 12 varies.

[0044] Here, in the row 22, first and second air supply openings 14, 15 are arranged as air supply openings, and in the row 20, third and fourth air supply openings 16, 17 are arranged as air supply openings.

[0045] The first air supply opening 14 is designed here with a first angle α1 of 0°. In this case, the circumferential wall normal, i.e. the perpendicular of the circumferential wall, in the area of the air supply opening and a first opening longitudinal axis are parallel to each other. With a cylindrical air supply opening, the first inlet surface and the first outlet surface completely overlap in projection along the circumferential wall normal.

[0046] Here, the second air supply opening 15 is formed at an angle. The second opening longitudinal axis 15a of the second air supply opening and the circumferential wall normal 8a in the region of the second air supply opening 15 are at a second angle α2 to each other. In this case, this second angle α2 lies exclusively in a plane spanned by the circumferential wall normal 8a and the circumferential direction. When the second air supply opening 15 is cylindrical, the second inlet surface 15b and the second outlet surface 15c partially overlap in projection along the circumferential wall normal 8a.

[0047] Here, the third air supply opening 16 is formed with a third angle α3 of 0°. In this case, the circumferential wall normal 8a, i.e., the perpendicular of the circumferential wall 8, in the region of the air supply opening and a third opening longitudinal axis 16a are parallel to each other. With the air supply opening being cylindrical, the third inlet surface 16b and the third outlet surface 16c completely overlap in projection along the circumferential wall normal 8a.

[0048] The fourth air supply opening 17 is formed obliquely here. The fourth opening longitudinal axis 17a of the fourth air supply opening 17b and the circumferential wall normal 8a in the region of the fourth air supply opening are at a fourth angle α4 to each other. In this case, this fourth angle α4 lies exclusively in a plane spanned by the circumferential wall normal 8a and the central axis. With the fourth air supply opening 17 being cylindrical, the fourth inlet surface 17b and the fourth outlet surface 17c partially overlap in projection along the circumferential wall normal 8a.

[0049] FIG. 3 shows an exemplary sectional view of a row of air supply openings. The air supply openings are arranged in a circumferential wall having a uniform thickness t of the wall. In the cut shown, first air supply openings 14, second air supply openings 15 and third air supply openings 16 are arranged periodically. The periodicity here is A-B-CA-B-C . . . . In this figure, the angles α1, α2 and α3 are to be exclusively in the plane shown. Here, the first air supply opening 14 is perpendicular to the circumferential wall 8. Thus, circumferential wall normal 8a and first opening longitudinal axis 14a are superimposed. The first outlet surface 14c of the first air supply opening 14 is arranged on the inner side of the circumferential wall, and the first inlet surface 14b is arranged on the outer side of the circumferential wall 8. The first inlet surface 14b and the first outlet surface 14c completely overlap in projection along the circumferential wall normal 8a.

[0050] The second air inlet opening 15 extends obliquely. Thus, circumferential wall normal 8a and second opening longitudinal axis 15a lie one above the other at a second angle α2 to each other. The second outlet surface 15c of the second air supply opening 15 is arranged on the inner side of the circumferential wall 8, and the second inlet surface 15b is arranged on the outer side of the circumferential wall 8. The second inlet surface 15b and the second outlet surface 15c partially overlap in projection along the circumferential wall normal 8a. Thus, an opening is provided as viewed along the circumferential wall normal 8a.

[0051] The third air supply opening 16 extends obliquely. Thus, circumferential wall normal 8a and third opening longitudinal axis 16a lie one above the other at a third angle α3 with respect to each other. The third outlet surface 16c of the third air supply opening 16 is arranged on the inner side of the circumferential wall 8, and the third inlet surface 16b is arranged on the outer side of the circumferential wall 8. The third inlet surface 16b and the third outlet surface 16c partially overlap in projection along the circumferential wall normal 8a. Thus, an opening is provided in the viewing direction along the circumferential wall normal 8a.

[0052] FIG. 4 shows an exemplary cut through a series of air supply openings of an evaporator receiving body of an alternative embodiment. The air supply openings here have a periodicity of A-B-A-C-A-B-A . . . , i.e. a first air supply opening 14 is followed by a second air supply opening 15. This is followed by another first air supply opening 14 followed by a third air supply opening 16. The first air supply opening has the angle α1, the second air supply opening has the angle α2 and the third air supply opening has the angle α3, where here α1 is not equal to α2 and α3.

[0053] FIG. 5 shows a section of cut perpendicular to a row in which the air supply openings have a tilt component, i.e., in the plane spanned by the central axis and circumferential normal 8a. In the embodiment shown, in a cylindrical portion of the circumferential wall, a first air supply opening 14 is arranged with a horizontal opening longitudinal axis 14a parallel to the circumferential wall normal. A third air supply opening 16 is arranged in a conical region of the circumferential wall 8, which has a opening longitudinal axis that forms the angle α3 to the circumferential wall normal 8a in the cut plane.

[0054] FIG. 6 shows a section cut through an alternative embodiment perpendicular to a row in which the air supply openings have a tilt component, i.e., an angle in the plane spanned by the central axis and circumferential normal 8a. In the embodiment shown, a second air supply opening 15 having an opening longitudinal axis 15a inclined with respect to the circumferential wall normal 8a is disposed in a cylindrical portion of the circumferential wall. A fourth air supply opening 17 is arranged in a conical region of the circumferential wall 8, which has a horizontal opening longitudinal axis 17a forming the angle α4 to the circumferential wall normal 8a in the cut plane.

[0055] Even though the disclosure is illustrated using the example of a burner with an evaporator receiving body, a circumferential wall with the air supply openings described above can also be arranged elsewhere in the burner, for example with a housing, as a separate component.

REFERENCE NUMERALS

[0056] 2 evaporator receiving body [0057] 4 fuel supply line [0058] 6 bottom region [0059] 8 circumferential wall [0060] 8a circumferential wall normal [0061] 10 receiving element [0062] 12 air supply opening [0063] 14 first air supply opening [0064] 14a first opening longitudinal axis [0065] 14b first inlet surface [0066] 14c first outlet surface [0067] 15 second air supply opening [0068] 15a second opening longitudinal axis [0069] 15b second inlet surface [0070] 15c second outlet surface [0071] 16 third air supply opening [0072] 16a third opening longitudinal axis [0073] 16b third inlet surface [0074] 16c third outlet surface [0075] 17 fourth air supply opening [0076] 17a fourth opening longitudinal axis [0077] 17b fourth inlet surface [0078] 17c fourth outlet surface [0079] 20 row [0080] 22 row [0081] α1 first angle [0082] α2 second angle [0083] α3 third angle [0084] α4 fourth angle [0085] t thickness