阅读说明：本技术 尤其用于燃料运行的车辆加热器的蒸发器组件 (Evaporator assembly, in particular for a fuel-operated vehicle heater ) 是由 K·默斯尔 B·迈尔 V·戴尔 J·斯蒂芬斯 于 2018-10-23 设计创作，主要内容包括：本发明涉及一种蒸发器组件(10)、尤其用于燃料运行的车辆加热器(12)的蒸发器组件,包括罐式的蒸发器接收部(14)、置入到罐式的蒸发器接收部(14)中的蒸发器体(16)、板式地构造的下压元件(18),所述下压元件固定在蒸发器接收部(14)上并且将蒸发器体(16)固定在蒸发器接收部(14)中,其中,所述板式地构造的下压元件(18)具有至少一个保持爪(22),所述保持爪在板式地构造的下压元件(18)的上侧(24)上具有上部分(26)并且在所述板式地构造的下压元件(18)的下侧(28)上具有下部分(30),其中,所述上部分(26)和所述下部分(30)从所述板式地构造的下压元件(18)离开地指向。(The invention relates to a vaporizer assembly (10), in particular for a fuel-operated vehicle heater (12), comprising a canister-type vaporizer holder (14), a vaporizer body (16) inserted into the canister-type vaporizer holder (14), a plate-type downward-pressing element (18), the hold-down element is fixed on the evaporator receptacle (14) and fixes the evaporator body (16) in the evaporator receptacle (14), wherein the plate-like downward-pressing element (18) has at least one holding claw (22), the holding claw has an upper part (26) on an upper side (24) of the plate-type push-down element (18) and a lower part (30) on a lower side (28) of the plate-type push-down element (18), wherein the upper part (26) and the lower part (30) are directed away from the plate-like configured hold-down element (18).)

1. Evaporator assembly (10), in particular for a fuel-operated vehicle heater (12), comprising:

-an evaporator receiving part (14) of the tank type,

-an evaporator body (16) inserted into the evaporator receptacle (14) of the canister type,

-a plate-shaped downward-pressing element (18) which is fastened to the evaporator receptacle (14) and which fixes the evaporator body (16) in the evaporator receptacle (14), and

-wherein the plate-like configured hold-down element (18) has at least one holding claw (22) which has an upper portion (26) on an upper side (24) of the plate-like configured hold-down element (18) and a lower portion (30) on a lower side (28) of the plate-like configured hold-down element (18),

-wherein the upper part (26) and the lower part (30) are directed away from the panelled hold-down element (18).

2. Evaporator assembly (10) according to claim 1, wherein the plate-shaped depression element (18) is connected with the evaporator receptacle (14) in a material-locking manner or is crimped to the evaporator receptacle (14).

3. Evaporator assembly (10) according to claim 1 or 2, wherein the plate-shaped structured press-down element (18) is substantially ring-disc-shaped.

4. The vaporiser assembly (10) of any one of claims 1-3, wherein a lower portion (30) of the at least one retaining claw (22) bears against the vaporiser body (16) in the vaporiser receiving portion (14) and/or into the vaporiser body (16).

5. The evaporator assembly (10) according to any one of claims 1 to 4, wherein the upper portion (26) and the lower portion (30) have the same shape.

6. A fuel operated vehicle heater (12) having an evaporator assembly (10) according to any one of claims 1 to 5.

Technical Field

An evaporator assembly is described, in particular for a fuel-operated vehicle heater.

Background

Fuel-operated vehicle heaters generally comprise an evaporator assembly in which a combustible fuel-air mixture is produced from liquid fuel and air, wherein the liquid fuel is first evaporated. The quality of the fuel-air mixture produced contributes substantially to maintaining increasingly stringent exhaust emission regulations. At the same time, a construction which is as simple as possible of the evaporator assembly is naturally desirable in order to be able to provide an evaporator assembly which is inexpensive to manufacture and reliable.

Disclosure of Invention

An evaporator assembly is described, particularly for a fuel operated vehicle heater. The evaporator assembly comprises a pot-type evaporator receptacle, an evaporator body inserted into the pot-type evaporator receptacle, and a plate-type hold-down element which is fastened to the evaporator receptacle and fixes the evaporator body in the evaporator receptacle. To set up: the hold-down element of the panelling configuration has at least one holding claw, which has an upper part on the upper side of the hold-down element of the panelling configuration and a lower part on the lower side of the hold-down element of the panelling configuration, wherein the upper part and the lower part are directed away from the hold-down element of the panelling configuration. In this case, the at least one holding claw is formed such that it has an upper part on the upper side of the plate-like formed hold-down element and a lower part on the lower side, the upper part projecting beyond the upper side, the lower part projecting beyond the lower side. In this way, a reliable and positionally accurate fixing of the evaporator body can be ensured, irrespective of whether the upper side of the plate-shaped hold-down element or the lower side of the plate-shaped hold-down element points in the direction of the inserted evaporator body during assembly. An unintentional "wrong" assembly of the push-down element (for example due to exchange of the upper side and the lower side) has no adverse effect. The at least one retaining pawl can inhibit sliding or movement of the evaporator in the evaporator receiving portion. At the same time, it is possible to dispense with the provision of additional tolerance compensation bodies in the evaporator receptacle, which keeps the construction of the evaporator assembly relatively simple. A further additional fixing of the evaporator body in the evaporator receptacle can also be dispensed with. The at least one retaining claw can enter the evaporator body locally with its part which is spaced away from the push-down element which is designed in a plate-like manner (said part pointing in the direction of the inserted evaporator body during the assembly of the push-down element) or at least press against its surface and thereby exert a force which fixes the holding claw on the evaporator body in the evaporator receptacle. The exact depth of penetration of the at least one retaining claw depends in particular on the actual thickness and density of the evaporator body and the length of the at least one retaining claw, so that the at least one retaining claw can act in a tolerance-balanced manner in particular. The inner diameter of the hold-down element, which is of plate-type design, can be between 22 and 68mm, preferably approximately 33 mm. The outer diameter of the hold-down element, which is designed in the manner of a plate, can be between 28 and 80mm, preferably approximately 42 mm. The length of the at least one holding claw can be between 0.5 and 8mm, preferably between 1 and 6 mm. Particularly preferably, the length of at least one holding claw is between 2 and 4 mm. The upper and lower portions of the at least one holding claw can be arranged directly next to one another. Alternatively, it is also possible for the upper part and the lower part to be arranged spaced apart from one another. The upper and lower parts can first be produced separately in the plane of the remaining push-down element, for example by twisting of the webs, engagement of the webs or double engagement of the split webs or alternatively punching of the inner edges of the push-down element.

It is usefully possible to provide: the hold-down element of the plate-type design is connected to the evaporator receptacle in a material-locking manner or is crimped to the evaporator receptacle. In this way, the evaporator receptacle, the evaporator body and the hold-down element can be permanently and reliably connected to one another, so that a permanently and reliably correct positioning of the evaporator body in the evaporator receptacle is also achieved in particular during operation and the ensuing thermal cycling of the evaporator assembly. The material-locking connection can be produced, for example, by welding or soldering.

It is advantageously possible to provide: the hold-down element of the plate-type construction is essentially ring-disk-shaped. In this way, the downwardly pressing element, which is designed in a plate-like manner, can define a visible surface of the evaporator body facing the combustion chamber, on which surface the fuel escapes in the gaseous state, for example through the empty interior of the annular disk. The evaporator arrangement itself can be designed substantially rotationally symmetrically, which makes the assembly of the evaporator arrangement simple, since the "twisting" of the components to be assembled has no adverse effect. If the hold-down element is substantially ring-disk-shaped, it can be designed both as an open and as a closed ring disk. The open configuration of the ring disk allows a defined orientation of the hold-down element relative to the evaporator receptacle, which can be advantageous in particular with regard to the relative position of the at least one holding claw.

It is possible to set: the lower part of the at least one retaining claw rests against the evaporator body in the evaporator receptacle and/or enters the evaporator body. The entry and/or abutment of the lower part of the at least one retaining claw on the evaporator body ensures a secure permanent fixing of the evaporator body in the evaporator receptacle.

Furthermore, it is possible to provide: the upper and lower portions have the same shape. In particular, the upper part and the lower part have a point-symmetrical contour with respect to a point of symmetry, so that the assembly of the hold-down element can be carried out selectively in the direction of the upper side of the evaporator body or in the direction of the lower side of the evaporator body and the same result is achieved in both cases.

Furthermore, a fuel-operated vehicle heater with such an evaporator assembly is described.

Drawings

Next, the present invention will be exemplarily explained according to a preferred configuration.

It shows that:

FIG. 1 is a first cross-sectional side view of the combustor;

FIG. 2 is a second cross-sectional side view of the burner;

FIG. 3 is a schematic top view of a hold-down element;

FIG. 4a is a first cross-sectional side view of the hold-down element;

FIG. 4b is a second cross-sectional side view of the hold-down element;

FIG. 4c is a third cross-sectional side view of the hold-down element;

FIG. 5 is a first exploded view in three dimensions of the evaporator assembly;

FIG. 6 is a second exploded view in three dimensions of the evaporator assembly;

FIG. 7 is a third exploded view in three dimensions of the evaporator assembly;

fig. 8 is a schematic illustration of a vehicle having a vehicle heater.

In the following figures, the same reference numerals indicate the same or analogous parts.

Detailed Description

Fig. 1 shows a first lateral cross-sectional view of the burner 44. The burner 44 includes the evaporator assembly 10 to which the burner tube 36 is connected such that the burner 44 extends substantially along the axial direction 40. The burner tube 36 has an air channel 38 from which the combustion air is diverted into the region directly above the evaporator assembly 10 and mixed with the fuel evaporated there. The burner tube 36 completely surrounds the evaporator assembly 10 in a radial direction 42 perpendicular to the axial direction 40. The evaporator assembly 10 includes a tank-shaped evaporator receptacle 14 into which an evaporator body 16 is inserted. An opening is located at the bottom of the evaporator receptacle of the pot-type design, through which opening fuel can enter the evaporator body 16 via a fuel feed 20 arranged on the opening. The evaporator body 16 is fixed in the evaporator receptacle 14 by means of a hold-down element 18. The hold-down element 18 extends in the radial direction 42 from the outer edge of the evaporator receptacle 14 in the direction of its center and is of substantially plate-like design. The hold-down element 18 can be soldered or welded, for example, to the upper edge of the evaporator receptacle 14. The hold-down element 18 can be designed, for example, in the form of a ring.

Fig. 2 shows a second lateral sectional view of the burner 44. The burner 44 shown in fig. 2 differs from the burner 44 known from fig. 1 in particular by the modified evaporator arrangement 10, which is embodied in a stepped manner in fig. 2 and forms a "dome" in the evaporator receptacle 14 in the region of the fuel feed 20, so that the evaporator body 16 is embodied thicker in the axial direction 40 in the region of the entry of the fuel. The vaporizer body 16 can also be constructed from a variety of different materials. For example, the vaporizer body 16 can be constructed of two different materials, as shown in fig. 2. In the region of the "dome" in the vicinity of the fuel supply 20, for example, a smaller porosity can be present than in the region of the evaporator body 16 which is located further away and adjoins the burner tube 36 in an open manner.

Fig. 3 shows a schematic top view of the hold-down element 18. The hold-down element 18 shown in fig. 3 is in particular of annular design and has an outer edge 52 and an inner edge 54. In the assembled state, the outer edge 52 can be soldered, welded or crimped with the evaporator reception. The inner edge 54 can have at least one retaining claw 22, four retaining claws 22 being depicted in fig. 3, which are distributed uniformly on the inner edge. However, it is also possible for more or fewer holding claws 22 to be distributed uniformly along the inner edge 54. The ring 46, which essentially forms the hold-down element 18, can be produced together with the holding claw 22, for example by simple punching from sheet metal.

Fig. 4a shows a first lateral sectional view of the hold-down element 18. In the hold-down element 18 shown in fig. 4a, the ring 46 is visible as a thin line in a lateral view. The ring has an upper side 24 and a lower side 28. The illustrated retaining claw 22 comprises two projections, which can be configured, for example, as rectangular tabs. The upper part 26 of the holding claw 22 can be raised in the direction of the upper side 24. The lower part 30 of the holding claw 22 can be raised in the direction of the underside 28. The contour of the upper part 26 and the lower part 30 or of both parts 26, 30 can be point-symmetrical, for example, with respect to a point of symmetry 34, so that the upper side 24 and the lower side 28 of the hold-down element 18 are not distinguished from one another. The upper and lower portions 26, 30 can also be configured to be of different lengths. The variant of the holding claw 22 shown in fig. 4a can be produced, for example, by the engagement of a web. The two parts 26, 30 can be arranged directly next to one another or spaced apart from one another.

Fig. 4b shows a second lateral sectional view of the hold-down element 18. In the push-down element 18 shown in fig. 4b, there is a visible flanking contour of the holding claw 22, for example made of a single web, the opposite ends of which are bent away in the direction of the upper side 24 and the lower side 28, so that in the case shown in fig. 4b the holding claw 22 or the contour of the holding claw 22 can also have a point symmetry with respect to the point of symmetry and the upper part 26 and the lower part 30 of the holding claw are visible. The variant of the holding claw 22 shown in fig. 4b can be produced, for example, by twisting the webs. It is also conceivable to bend only one side of the tab, so that the upper part 26 is located on a different tab than the lower part 30, for example. The two parts 26, 30 can be arranged directly next to one another or spaced apart from one another.

Fig. 4c shows a lateral third sectional view of the hold-down element 18. In a third possibility for configuring the holding pawl 22, which is shown in fig. 4c, the inner edge 54, which is shown in fig. 3, is raised alternately upwards and downwards in the direction of the upper side 24 and the lower side 28, simply by stamping. Here, too, a certain degree of symmetry about the point of symmetry 34 is produced.

Fig. 5 shows a three-dimensional first exploded view of the evaporator assembly 10. In the evaporator arrangement 10 shown in fig. 5, the evaporator receptacle 14 of the pot-type design is first visible on the left. An opening is visible in the bottom of the evaporator receptacle 14, through which opening fuel flowing through the fuel feed 20 can enter the evaporator receptacle 14 during operation. The evaporator body 16 is first inserted in the axial direction 40 into the evaporator receptacle 14. The evaporator body 16 can then be fixed in the evaporator receptacle by means of the hold-down element 18 having a plurality of holding claws 22. For this purpose, the hold-down element 18 is also laid flat in the axial direction 40 on the evaporator receptacle 14 and the evaporator body 16, so that at least the retaining claws 22 rest on the evaporator body 16 or even partially enter into it. The hold-down element 18 can then be soldered, welded or crimped, for example, around the evaporator receptacle 14. The openings in the annular pressure element 18 can be used to orient the pressure element 18 in a targeted manner relative to the evaporator receptacle 14.

Fig. 6 shows a second exploded view of the evaporator assembly 10 in three dimensions. The evaporator arrangement 10 shown in fig. 6 differs from the evaporator arrangement 10 known from fig. 2 by the additional tolerance compensation element 48, which is inserted into the evaporator receptacle 14 below the evaporator body 16 and, in particular, ensures that the evaporator body 16 does not protrude from the bottom of the evaporator receptacle 14 in the assembled state, since such a gap prevents a homogeneous fuel-air mixture from forming.

Fig. 7 shows a third exploded view of the evaporator assembly 10 in three dimensions. The evaporator assembly 10 shown in fig. 7 differs from the evaporator assembly 10 known from fig. 5 in particular in that the hold-down element 18 forms a closed loop, while the hold-down element 18 shown in fig. 5 forms an open loop.

Fig. 8 shows a schematic representation of a vehicle with a vehicle heater. The vehicle 50 shown in fig. 8 comprises a vehicle heater 12 with an evaporator assembly 10 on which a burner tube 36 is arranged. The fuel evaporated by the evaporator assembly 10 flows together with the combustion air into the combustion tube 36 and is combusted there in a heat-releasing manner. The generated heat can be used, for example, to heat a fluid flow, which in turn heats the vehicle interior, for example.

The features of the invention disclosed in the above description, in the drawings and in the claims can be essential both individually and in any combination for the realization of the invention.

List of reference numerals

10 evaporator assembly

12 vehicle heater

14 evaporator receiving part

16 evaporator body

18 hold-down element

20 fuel supply device

22 holding claw

24 upper side

26 upper part

28 lower side

30 lower part

34 point of symmetry

36 burner tube

38 air channel

40 axial direction

42 radial direction

44 burner

46 ring

48 tolerance balancing element

50 vehicle

52 outer edge

54 inner edge.