Evaporator assembly for mobile heating devices

Abstract

An evaporator subassembly for mobile heating devices, in particular for a motor vehicle, having the following: an evaporator, an evaporator receptacle which is constructed to receive the evaporator, a glow plug and a combustion chamber, wherein the glow plug extends or is constructed to be extensible obliquely relative to a main surface of the evaporator into the combustion chamber.

Claims

1. An evaporator subassembly for mobile heating devices, in particular for a motor vehicle, having the following: an evaporator; an evaporator receptacle which is constructed to receive the evaporator, wherein a main member of the evaporator is disc-shaped and/or plate-shaped; a glow plug and a combustion chamber, wherein at least a portion of the glow plug extends or is constructed to be extensible into the combustion chamber angled obliquely relative to a main surface of the evaporator and at a position offset from the main surface of the evaporator main surface, wherein a free spatial portion is located between the main surface of the evaporator and the at least a portion of the glow plug in the combustion chamber.

2. The evaporator subassembly according to claim 1, wherein at least one central projection projects from a main surface of the evaporator.

3. The evaporator subassembly according to claim 2, wherein a cross-sectional profile of the projection of the evaporator is constructed to be polygonal.

4. The evaporator subassembly according to according to claim 2, wherein the projection of the evaporator is constructed as a ring.

5. The evaporator subassembly according to according to claim 2, wherein the projection is an integral component of the evaporator.

6. The evaporator subassembly according to claim 1 wherein a one-stage, two-stage or multi-stage evaporator dome is provided between the evaporator receptacle and a fuel supply line.

7. The evaporator subassembly according to claim 1, wherein the glow plug is received in the evaporator receptacle via a glow plug bush.

8. Evaporator subassembly according to claim 7, wherein the glow plug is fixed in the glow plug bush by a bent plate member, and/or a thread and/or a press-fit.

9. The evaporator subassembly according to claim 1, wherein the evaporator comprises a porous nonwoven material, and/or a textile moulded fibre member, and/or a porous heat-resistant metal.

10. The evaporator subassembly according to claim 1, further comprising a flame detector which forms an integral component with the glow plug.

11. The evaporator subassembly according to claim 1, wherein the evaporator receptacle has at least one combustion air perforation.

12. A motor vehicle, comprising an evaporator subassembly according claim 1.

13. Method for producing an evaporator subassembly according to claim 1, comprising the following steps: forming the evaporator receptacle; providing the evaporator; and receiving the evaporator in the evaporator receptacle.

14. Method for production according to claim 13, wherein a projection is formed extending from a main surface of the evaporator in one step with the evaporator by pressing a basic material into a negative mould, or is fitted to the evaporator by sintering or welding.

15. A kit for producing an evaporator subassembly according to claim 1 comprising an evaporator receptacle and at least two different evaporators which can be received selectively in the evaporator receptacle and which are constructed differently.

16. The evaporator subassembly according to claim 1, wherein the evaporator comprises a nonwoven metal fiber.

17. The evaporator subassembly according to claim 1, wherein the evaporator comprises steel.

18. The evaporator subassembly according to claim 1, wherein the glow plug extends into the combustion chamber through a side wall of the evaporator receptacle.

Description

(1) The disclosure is described below with reference to embodiments which are explained in greater detail with reference to the illustrations. In the drawings:

(2) FIG. 1A is a cross-section of an evaporator subassembly for a mobile heating device, as may be found in the prior art;

(3) FIG. 1B is a cross-section of an evaporator subassembly for a mobile heating device according to another embodiment of the prior art;

(4) FIG. 1C is a cross-section of an evaporator subassembly for a mobile heating device, as generally used in the prior art;

(5) FIG. 2 is a cross-section of a first embodiment of the evaporator subassembly according to the disclosure;

(6) FIG. 3 is a cross-section of a second embodiment of the evaporator subassembly according to the disclosure;

(7) FIG. 4 is a cross-section of an additional embodiment of the evaporator subassembly according to the disclosure;

(8) FIG. 5 is a side view of an additional embodiment of the evaporator subassembly according to the disclosure;

(9) FIG. 6 is a side view of an additional embodiment of the evaporator subassembly according to the disclosure;

(10) FIG. 7 is a side view of an additional embodiment of the evaporator subassembly according to the disclosure;

(11) FIG. 8 is a cross-section of an embodiment of the evaporator according to the disclosure;

(12) FIG. 9 is a cross-section of an additional embodiment of the evaporator according to the disclosure; and

(13) FIG. 10 is a cross-section of an embodiment of the evaporator according to the disclosure.

(14) FIG. 2 is a cross-section of a first embodiment of the evaporator subassembly according to the disclosure. The evaporator subassembly comprises an evaporator receptacle 2 in which an evaporator 1 is received. The evaporator receptacle 2 opens in a combustion chamber 6. A fuel supply line 10, through which fuel reaches the evaporator 1 and the fuel in the evaporator is dispersed and vaporised out of the evaporator 1 in the direction of the combustion chamber 6, opens centrally in the evaporator receptacle 2.

(15) Furthermore, a plurality of combustion air perforations 7 are constructed in a side wall 14 of the evaporator receptacle 2, through which combustion air can reach the combustion chamber 6 and can mix with the evaporated fuel. It would also be similarly possible (cf. FIG. 4) for the combustion air perforations 7 to be constructed in a side wall (other side wall or additional side wall with respect to the evaporator receptacle) of the combustion chamber 6.

(16) A glow plug bush 5 is arranged in an additional portion of the side wall 14, wherein it defines an angle α of the glow plug 4 with respect to a main surface 11 of the evaporator 1. The main surface 11 is a (free) surface of a main member 8 of the evaporator 1. The main member 8 is formed by the (entire) evaporator 1 (where applicable without any projection 9, if present, cf. FIG. 4). In FIG. 2, the evaporator 1 does not have any projection 9 and has at least substantially a constant thickness or is constructed to be disc-like (for example, with a circular outline).

(17) It would also be conceivable for the glow plug bush 5 to be constructed on another side wall of the combustion chamber 6. A glow plug 4 is received in the glow plug bush 5, wherein the glow plug is fixed by a retention element (not illustrated). Furthermore, a flame detector (not illustrated) can be integrated in the glow plug 4 so that the glow plug can provide an additional functionality of flame monitoring.

(18) FIG. 3 is a cross-section of a second embodiment of the evaporator subassembly according to the disclosure in which in addition to the embodiment illustrated in FIG. 2 a two-stage evaporator dome 3 is integrated in the evaporator receptacle 2 between the fuel supply line 10 and the evaporator 1.

(19) FIG. 4 is a cross-section of an additional embodiment of the disclosure, in which the combustion chamber 6 is delimited by a side wall 14 of the combustion chamber 6 which is separate from the evaporator receptacle. In addition to the embodiment which is illustrated in FIG. 2, a retention device 13 is arranged at the outer edge of the evaporator receptacle 2 and is constructed in this embodiment as a retention ring. The evaporator 1 is fixed in its position by the retention device 13.

(20) FIG. 5 is a cross-section of an additional embodiment. In this embodiment, in addition to the embodiment from FIG. 4, a one-stage evaporator dome 3 is arranged between the evaporator receptacle 2 and a fuel supply line 10.

(21) FIG. 6 is a cross-section of an additional embodiment of the evaporator subassembly according to the disclosure. In this case, the evaporator 1 has a central projection 9 which projects out of the evaporator 1 in the direction of the combustion chamber 6 and which thus reduces a spacing between the evaporator 1 and the glow plug 4. The projection 9 of the evaporator 1 is in this embodiment a cylinder (illustrated as a rectangle in the cross-section).

(22) FIG. 7 is a cross-section of an additional embodiment of the evaporator subassembly according to the disclosure in which, in addition to the embodiment illustrated in FIG. 6, an evaporator dome 3 is integrated in the evaporator receptacle 2 between the fuel supply line 10 and the evaporator 1. Preferably, a multi-stage evaporator dome 3 is integrated in the evaporator receptacle 2 (not illustrated).

(23) FIG. 8 is a cross-section of an embodiment of the evaporator 1 according to the disclosure. In this embodiment, the projection 9 is substantially formed by a cylinder.

(24) FIG. 9 is a cross-section of an additional embodiment of the evaporator 1 according to the disclosure. In this embodiment, a ring (torus) forms the projection 9. An upper side of the ring which projects into the combustion chamber 6 is flattened in a radial direction in this case, whereby two trapeziums which each have a side which is flattened in an axial direction can be seen in the cross-sectional view.

(25) FIG. 10 is a cross-section of an additional embodiment of the evaporator 1 according to the disclosure. In this embodiment, a cone forms the projection 9 of the evaporator 1. The projection 9 is illustrated as a trapezium in the cross-sectional view in FIG. 10.

(26) At this point, it may be noted that all the above-described components are claimed alone per se and in any combination, in particular the details illustrated in the drawings, as being inventively significant. Modifications thereto are commonplace to the person skilled in the art.

LIST OF REFERENCE NUMERALS

(27) 1 Evaporator

(28) 2 Evaporator receptacle

(29) 3 Evaporator dome

(30) 4 Glow plug/flame detector

(31) 5 Glow plug bush

(32) 6 Combustion chamber

(33) 7 Combustion air perforation

(34) 8 Main member

(35) 9 Projection

(36) 10 Fuel supply line

(37) 11 Main surface of the evaporator

(38) 12 Gap

(39) 13 Retention device

(40) 14 Side wall

(41) α Angle