Wall chimney attachment for a heating device of a vehicle

Abstract

The invention relates to a wall chimney attachment for a heating device of a vehicle, in particular of a caravan or motor caravan. The wall chimney attachment has an attachment part, a cover part, an exhaust-gas inlet opening, an exhaust-gas outlet opening, and an exhaust-gas duct which is formed between the attachment part and the cover part and which extends longitudinally between the exhaust-gas inlet opening and the exhaust-gas outlet opening. The exhaust-gas duct extends longitudinally in curved fashion at least in portions and has differently oriented duct longitudinal directions, wherein: a first duct longitudinal direction at the exhaust-gas inlet opening points away from an installation plane of the attachment part; a second duct longitudinal direction between the exhaust-gas inlet opening and the exhaust-gas outlet opening points toward the installation plane; and a third duct longitudinal direction at the exhaust-gas outlet opening points away from the installation plane.

Description

[0001] Wall chimney attachment for a vehicle heating system

[0002] The invention relates to a wall chimney attachment for a heating device of a vehicle, in particular a caravan or motor caravan.

[0003] Recreational vehicles, such as caravans (mobile homes) or motorhomes (mobile homes), are typically equipped with a heater to heat the vehicle interior. Such heaters are powered by gas, gasoline, or diesel, for example. Exhaust gases generated during operation of the heater are released into the environment, usually via an exhaust or chimney duct that extends through the vehicle's exterior wall and is fitted with a wall chimney attachment attached to the vehicle's exterior wall. The wall chimney attachment serves as weather protection, a barrier against intrusion, and a visual cover.

[0004] EP 3 428 533 B1 discloses a wall-mounted chimney attachment with an exhaust gas inlet opening, an exhaust gas outlet opening, and an exhaust duct extending longitudinally between the two openings. The exhaust duct is straight and, when the wall-mounted chimney attachment is mounted, is oriented approximately orthogonally to the vehicle's outer wall. The known wall-mounted chimney attachment also has a type of cover that, when mounted, is attached to the vehicle's outer wall. The exhaust gas outlet opening is incorporated into the cover and provided with fins, by means of which the exhaust gas flow in the area of ​​the exhaust gas outlet opening is deflected obliquely downwards, starting from the aforementioned orthogonal orientation of the exhaust duct.

[0005] DE 25 48 543 A1 discloses a wall chimney cap with an exhaust gas inlet, an exhaust gas outlet, and an exhaust duct extending between these two openings. Starting from an initially approximately orthogonal extension to an outer wall, the exhaust duct is angled upwards by approximately 90° in the area of ​​the exhaust gas outlet, thus parallel to the outer wall.

[0006] The object of the invention is to provide a wall chimney attachment for a heating device of a vehicle which has improved properties compared to the prior art.

[0007] This object is achieved by providing a wall chimney attachment with the features of claim 1. Advantageous embodiments are specified in the subclaims. The wording of the claims is incorporated into the description by reference. The wall chimney attachment according to the invention has an attachment part, a cover part, an exhaust gas inlet opening, an exhaust gas outlet opening and an exhaust gas duct. The attachment part has a mounting plane which, when the wall chimney attachment is mounted, is aligned parallel to an outer wall of the vehicle. The cover part is joined to the attachment part and covers the attachment part in a viewing direction directed towards the mounting plane. The exhaust gas inlet opening is arranged on the attachment part and is designed for exhaust-conducting connection to the heating device. The exhaust gas outlet opening is arranged on the attachment part and / or the cover part and opens into the environment.The exhaust duct is formed between an inner wall of the attachment part and an inner wall of the cover part which is opposite in the normal direction to the mounting plane. The exhaust duct connects the exhaust gas inlet opening to the exhaust gas outlet opening in an exhaust-conducting manner. The exhaust duct has a longitudinal duct axis which is arranged in a longitudinal duct plane oriented orthogonal to the mounting plane. The longitudinal duct axis is curved at least in sections. As a result of the longitudinal extension of the longitudinal duct axis being curved at least in sections, the exhaust duct has differently oriented longitudinal duct directions at different positions along the longitudinal duct axis. At the exhaust gas inlet opening, the longitudinal duct axis has a first longitudinal duct direction. The first longitudinal duct direction points away from the mounting plane. At a position between the exhaust gas inlet opening and the exhaust gas outlet opening, the longitudinal duct axis has a second longitudinal direction.The second duct longitudinal direction points toward the mounting plane. At the exhaust outlet, the duct longitudinal axis has a third duct longitudinal direction. The third duct longitudinal direction points away from the mounting plane.

[0008] The wall chimney attachment according to the invention has a particularly simple structure and simultaneously allows for aerodynamically improved exhaust gas routing and exhaust gas discharge into the environment. This particularly simple structure is achieved through the multi-part design comprising the attachment and the cover part. The improved exhaust gas routing and exhaust gas discharge are achieved through the exhaust duct formed between the attachment and the cover part and extending longitudinally in the manner described above in a curved manner and / or with different longitudinal orientations. Due to the inventive variable orientation of the exhaust duct along the longitudinal axis of the duct and thus the flow direction of the exhaust gas, the exhaust gas flow is deflected in an S-shape and / or with opposing curves between the exhaust gas inlet and the exhaust gas outlet.Compared to an abrupt 90° deflection known from the prior art, the flow impulse (short: impulse) of the exhaust gas flow is reduced to a lesser extent. This ensures that the exhaust gas flow exits the exhaust outlet opening with the strongest possible impulse. By orienting the longitudinal axis of the duct at the exhaust outlet opening (third longitudinal direction of the duct), pointing away from the mounting plane and thus, when mounted, away from the vehicle's outer wall, the exhaust gas flow is discharged into the environment in a free jet, pointing away from the vehicle's outer wall. By discharging the exhaust gas while maintaining as much momentum as possible and at the same time pointing away from the mounting plane / the vehicle's outer wall, it is prevented that the exhaust gas flow attaches to the vehicle's outer wall and thereby causes soiling, discoloration or other impairments.In addition, it is avoided that any fresh air intake of the heating device provided in the area of ​​the wall chimney attachment is impaired by the exhaust gas flow.

[0009] The first channel longitudinal direction is preferably oriented parallel to the normal direction of the mounting plane and thus orthogonal to the vehicle outer wall, pointing towards the environment (outwards). The second channel longitudinal direction is directed obliquely to the mounting plane and thus towards the vehicle outer wall (inwards). In other words, the second channel longitudinal direction is inclined within the channel longitudinal plane by more than 90°, preferably between 100° and 135°, relative to the first channel longitudinal direction. Preferably, the third channel longitudinal direction is inclined relative to the normal direction of the mounting plane at an angle between 20° and 70°, preferably between 30° and 60°, more preferably between 40° and 50°, particularly preferably 45°.

[0010] In one embodiment of the invention, the exhaust duct has a duct width projected onto the mounting plane, which increases along the duct's longitudinal axis, starting from the exhaust gas inlet opening toward the exhaust gas outlet opening. The duct width increasing downstream along the duct's longitudinal axis further improves the flow of the exhaust gases. The duct width preferably increases continuously.

[0011] In a further embodiment of the invention, the exhaust duct has a curved, elongated duct section in the duct longitudinal plane, which is formed between a concave inner wall section of the inner wall of the attachment part and a convex exhaust gas guide geometry arranged and / or formed on the inner wall of the cover part. The formation of the curved, elongated duct section between the concave inner wall section of the attachment part and the convex exhaust gas guide geometry of the cover part allows for simplified production. Furthermore, the curved, elongated duct section can be aerodynamically optimized in a particularly simple manner by appropriately designing the concave inner wall section and the convex exhaust gas guide geometry. The inner wall of the attachment part is curved in the region of the concave inner wall section.The convex exhaust guide geometry is, in the broadest sense, curved from the inner wall of the cover part and / or protrudes from the inner wall of the cover part. In one embodiment, the convex exhaust guide geometry is a flat (convex) inner wall section of the cover part. In another embodiment, the convex exhaust guide geometry is formed by several exhaust guide elements. In one embodiment, the convex exhaust guide geometry is formed by one or more separately manufactured elements arranged on the inner wall of the cover part. In another embodiment, the convex exhaust guide geometry is an integral section of the cover part.

[0012] In a further embodiment of the invention, the cover part has an outer wall that lies opposite the convex exhaust gas guide geometry in the normal direction of the mounting plane. The outer wall is not concave and forms a visible surface of the wall chimney attachment. The non-concave design of the outer wall and thus of the visible surface achieves various advantages. Firstly, the overall height of the wall chimney attachment can be kept low in relation to the normal direction. In other words, a low installation height in relation to the vehicle's outer wall is achieved. Secondly, the non-concave design of the outer wall prevents the accumulation of dirt. Furthermore, it prevents moisture, in particular condensate from the exhaust flow, from accumulating on the outer wall / visible surface. The outer wall of the cover part is preferably flat.

[0013] In a further embodiment of the invention, the convex exhaust gas guide geometry is formed by a plurality of exhaust gas guide elements arranged at a distance along the longitudinal axis of the duct, each of which extends longitudinally along the inner wall of the cover part. The plurality of exhaust gas guide elements allows the convex exhaust gas guide geometry to be structurally optimized in a simple manner. In addition, manufacturing advantages arise compared to a flat, convex design of the inner wall of the cover part. This is particularly true when the cover part is injection-molded in one piece from plastic. The plurality of exhaust gas guide elements are spaced along the longitudinal axis of the duct and are thus arranged with a gap. The flow properties of the convex exhaust gas guide geometry can be structurally influenced by the shape and dimensions of the exhaust gas guide elements as well as their spacing.The exhaust gas guide elements each protrude, preferably at different heights, from the inner wall of the cover part opposite to the normal direction of the mounting plane and thus in the direction of the attachment part from the inner wall of the cover part.

[0014] In a further embodiment of the invention, the exhaust gas guide elements are each designed as ribs. The ribs are arranged and / or formed on the inner wall of the cover part. By designing the exhaust gas guide elements as ribs, simplified production of the cover part can be achieved. This applies in particular when the cover part is injection-molded in one piece from plastic. In a further embodiment of the invention, the exhaust gas guide elements have different heights with respect to the normal direction of the mounting plane to form the convex shape of the exhaust gas guide geometry. This allows the shape of the convex exhaust gas guide geometry to be structurally defined and optimized in a particularly simple manner. In this embodiment of the invention, the exhaust gas guide elements, in particular the ribs, protrude from the inner wall of the cover part at different heights. The different heights define the convex contour of the exhaust gas guide geometry.Preferably, the height of the ribs along the longitudinal axis of the duct initially increases and then decreases, starting from the exhaust gas inlet opening toward the exhaust gas outlet opening. In other words, the height of the ribs initially increases downstream and then decreases again. The initially increasing and then decreasing height defines the convex shape of the exhaust gas guide geometry.

[0015] In a further embodiment of the invention, the exhaust guide elements, in particular the ribs, are each longitudinally inclined relative to an imaginary horizontal orientation. Alternatively or additionally, the exhaust guide elements, in particular the ribs, protrude from the inner wall of the cover part at an inclination relative to the imaginary horizontal orientation. This inclination promotes the drainage of condensate from the exhaust guide elements, in particular the ribs, to counteract the accumulation of moisture and dirt.

[0016] In a further embodiment, the cover part is made in one piece from plastic. Production is preferably carried out by injection molding. In designs with a convex exhaust guide geometry, this is preferably an integral component of the one-piece cover part. The attachment part is also preferably made in one piece from plastic, in particular by injection molding.

[0017] In a further embodiment of the invention, the cover part and the attachment part are joined together by means of a snap-in connection. This enables particularly simple assembly. In particular, separate fastening means, such as screws, can be dispensed with. The snap-in connection is preferably detachable. This allows easy disassembly of the cover part from the attachment part. The cover part preferably has at least one, preferably several, snap-in sections, wherein the attachment part has at least one, preferably several, complementary snap-in sections that interact with the snap-in sections of the attachment part to form the snap-in connection.

[0018] In a further embodiment of the invention, the wall chimney attachment has a functional wall section arranged downstream of the exhaust gas inlet opening, wherein the functional wall section is designed to deflect the exhaust gas flow flowing through the exhaust gas inlet opening towards the exhaust gas outlet opening. Alternatively or additionally, the functional wall section is designed to thermally shield a / the outer wall of the cover part from the exhaust gas flow. The functional wall section, like the inner wall of the attachment part and the inner wall of the cover part, forms a duct wall of the exhaust gas duct. The functional wall section is arranged and / or formed on the inner wall of the cover part. In one embodiment, the functional wall section is a wall section of the cover part. In a further embodiment, the functional wall section is a wall section of the attachment part.In a further embodiment, the functional wall section is a further component of the wall chimney attachment. Preferably, the functional wall section deflects the first duct longitudinal direction toward the second duct longitudinal direction. In embodiments with an exhaust gas guide geometry, the functional wall section is positioned upstream of the exhaust gas guide geometry toward the exhaust gas inlet opening. The aforementioned deflection of the exhaust gas flow by means of the functional wall section allows for further improved exhaust gas guidance. The aforementioned thermal shielding by means of the functional wall section prevents the outer wall of the cover part from heating up excessively or from being overstressed or discolored due to the thermal effects of the exhaust gas flow.

[0019] In a further embodiment of the invention, the attachment part has a pipe socket which has the exhaust gas inlet opening at one end and forms a straight, elongated channel section of the exhaust duct, wherein the pipe socket is designed to be plugged together with an exhaust pipe section of a chimney adapter part which, when installed, protrudes through an opening in the vehicle's outer wall. The pipe socket allows for easy exhaust-carrying attachment of the attachment part to the chimney adapter part. The chimney adapter part is not part of the wall chimney attachment and serves as an indirect exhaust-carrying connection between the wall chimney attachment and the heating device. The chimney adapter part is part of an exhaust system of the heating device and, when installed, is mounted on and / or in the aforementioned opening in the vehicle's outer wall.When assembled, the exhaust pipe section of the chimney adapter part is connected at one end to the heating device and at the other end to the exhaust gas inlet opening of the attachment part. Preferably, the attachment part has one or more fastening sections designed for attachment to complementary fastening sections of the chimney adapter part. The fastening sections are preferably locking sections that allow the attachment part to be locked to the chimney adapter part.

[0020] The invention further relates to an arrangement comprising a wall-mounted chimney attachment as described above and comprising a chimney adapter part. The chimney adapter part has an air supply pipe section and an exhaust pipe section. The air supply pipe section is configured to supply combustion air to the heating device. The exhaust pipe section is connected at one end to the heating device for exhaust gas conduction and at the other end to the exhaust gas inlet opening of the wall-mounted chimney attachment. The exhaust pipe section is arranged in a cross-section of the air supply pipe section. The air supply pipe section and the exhaust pipe section form a pipe-in-pipe system. The arrangement further comprises a fresh air inlet opening. The fresh air inlet opening opens from the ambient air into the air supply pipe section and is formed between the attachment part and the chimney adapter part.The arrangement therefore has, on the one hand, the fresh air inlet for taking in combustion air for the heating device from the environment, and, on the other hand, the exhaust gas outlet for discharging the exhaust gases from the heating device into the environment. The exhaust gas outlet is formed between the attachment and the cover part. The fresh air inlet is formed between the attachment and the chimney adapter part. The above-described design of the wall chimney attachment and the resulting particularly advantageous exhaust gas routing and exhaust gas discharge prevent any impairment of the fresh air intake.

[0021] In a further embodiment of the invention, the wall chimney attachment is designed to form a further fresh air inlet opening, which is formed between the wall chimney attachment and the vehicle outer wall when the arrangement is mounted on the vehicle, wherein the further fresh air inlet opening forms a main inlet and the fresh air inlet opening forms an additional inlet for the fresh air. In other words: In this embodiment, the actual fresh air intake takes place through the further fresh air inlet opening, and the fresh air inlet opening allows additional fresh air intake. In the mounted state of the arrangement, the further fresh air inlet opening is formed between the vehicle outer wall and the wall chimney attachment, for example by the wall chimney attachment being placed on the latter at a defined distance from the vehicle outer wall.The further fresh air inlet opening is preferably at least partially extended longitudinally around the wall chimney attachment.

[0022] In a further embodiment of the invention, the exhaust outlet opening is arranged above the fresh air inlet opening and / or the additional fresh air inlet opening with respect to the normal direction of the mounting plane. In the mounted state, the exhaust outlet opening is consequently further away from the vehicle's outer wall than the fresh air inlet opening and / or the additional fresh air inlet opening. This further counteracts any impairment of fresh air intake caused by exhaust gas discharge. This is particularly true when the exhaust outlet opening and the fresh air inlet opening are arranged on a common side of the arrangement, which is advantageous but not the case in all embodiments.

[0023] In a further embodiment of the invention, the exhaust gas outlet opening and the fresh air inlet opening are arranged on a common side of the assembly and / or are oriented identically. The common side is preferably a bottom side that points vertically downward when the assembly is assembled. By arranging the exhaust gas outlet opening and the fresh air inlet opening on the common side, impairments to the fresh air intake and exhaust gas discharge caused by changing wind conditions in the surrounding area can be compensated for.

[0024] Further advantages and features of the invention emerge from the claims and from the following description of preferred embodiments of the invention, which are illustrated with reference to the drawings.

[0025] Fig. 1 shows a schematic perspective view of an embodiment of a wall chimney attachment according to the invention,

[0026] Fig. 2 the wall chimney attachment according to Fig. 1 in a perspective view rotated by approximately 180°,

[0027] Fig. 3 the wall chimney attachment according to Figs. 1 and 2 in a partially cut-out front view along a section line III-III (see Fig. 4),

[0028] Fig. 4 the wall chimney attachment according to Figs. 1 to 3 in a schematic sectional view along a section line IV-IV (see Fig. 3),

[0029] Fig. 5 is an enlarged detail view of a section of the sectional view according to Fig. 4,

[0030] Fig. 6 shows a schematic perspective view of a chimney adapter part intended for use with the wall chimney attachment according to Figs. 1 to 5,

[0031] Fig. 7 is a schematic side view of the chimney adapter part according to Fig. 6,

[0032] Fig. 8 shows a schematic perspective view of another embodiment of a wall chimney attachment according to the invention, Fig. 9 shows the wall chimney attachment according to Fig. 8 in a perspective view rotated by approximately 180°,

[0033] Fig. 10 the wall chimney attachment according to Figs. 8 and 9 in a partially cut-out front view along a section line XX (see Fig. 11),

[0034] Fig. 11 the wall chimney attachment according to Figs. 8 to 10 in a schematic sectional view along a section line XI-XI (see Fig. 10),

[0035] Fig. 12 shows a schematic front view of an attachment part of the wall chimney attachment according to Figs. 8 to 11,

[0036] Fig. 13 in a schematic sectional view corresponding to Figs. 4 and 11 a further embodiment of a wall chimney attachment according to the invention,

[0037] Fig. 14 shows a schematic side view of an embodiment of an arrangement according to the invention with a wall chimney attachment and a chimney adapter part,

[0038] Fig. 15 the arrangement according to Fig. 14 in a schematic front view,

[0039] Fig. 16 the arrangement according to Figs. 14 and 15 in a further, partially cut-out

[0040] side view,

[0041] Fig. 17 is an enlarged detailed view of the arrangement according to Fig. 16 in an area Y,

[0042] Fig. 18 the arrangement according to Figs. 14 to 17 in a partially cut-out

[0043] front view,

[0044] Fig. 19 shows a schematic front view of the chimney adapter part of the arrangement according to Figs. 14 to 18,

[0045] Fig. 20 is an enlarged detail view of the chimney adapter part according to Fig. 19 in an area Z and

[0046] Fig. 21 shows the wall chimney attachment of the arrangement according to Figs. 14 to 18 in a schematic bottom view, looking toward an exhaust outlet and a fresh air inlet. According to Figs. 1 to 5, a wall chimney attachment 1 is provided for a heating system of a vehicle not shown in the figures. The vehicle in question is a caravan or motorhome. When mounted on the vehicle, the wall chimney attachment 1 is attached to an exterior wall W (see Fig. 4) of the vehicle in a manner described in more detail below.

[0047] The wall chimney attachment 1 has an attachment part 100, a cover part 200, an exhaust gas inlet opening 2, an exhaust gas outlet opening 3 and an exhaust gas duct 4.

[0048] The attachment part 100 has a mounting plane M (see Fig. 4) which, when the wall chimney attachment 1 is mounted on the vehicle, is aligned parallel to the vehicle outer wall W. The vehicle outer wall W and thus also the mounting plane M are aligned vertically. A normal direction N of the mounting plane M and thus also of the vehicle outer wall W is oriented horizontally in this case. The normal direction N points into an environment U, or in other words, and with respect to a vehicle interior of the vehicle, from the inside to the outside.

[0049] The cover part 200 is joined to the attachment part 100. A screw, snap-in, clamp, and / or plug-in connection can be used as a joining connection. In the embodiment shown, the cover part 200 is plugged onto the attachment part 100 counter to the normal direction N. The cover part 200, together with the attachment part 100 and any chimney adapter part 300 (see Figs. 6, 7), is screwed to the vehicle's outer wall W. For this purpose, the attachment part 100 and the cover part 200 have through-holes (not designated in more detail here) extending orthogonally to the mounting plane M (see Fig. 3). The attachment part 100 is covered by the cover part 200. In the present case, the attachment part 100 is completely covered by the cover part 200 in a viewing direction counter to the normal direction N.

[0050] In the embodiment shown, the exhaust gas inlet opening 2 is formed on the attachment part 100. In other words, the attachment part 100 has the exhaust gas inlet opening 2. The exhaust gas inlet opening 2 is designed for the exhaust gas-carrying connection to the heating device. In the assembled state, the exhaust gas inlet opening 2 is indirectly connected to the heating device via the chimney adapter part 300.

[0051] In the embodiment shown, the exhaust outlet opening 3 is formed between the attachment part 100 and the cover part 200 (see in particular Fig. 4). The exhaust outlet opening 3 opens into the environment U. In the embodiment shown, the exhaust outlet opening 3 is arranged on an underside of the wall chimney attachment 1 in the assembled state.

[0052] The exhaust duct 4 extends between the exhaust inlet opening 2 and the exhaust outlet opening 3 and establishes an exhaust gas-conducting and / or fluid-conducting connection between these two openings 2, 3. The exhaust duct 4 is formed, at least in sections, between an inner wall 101 of the attachment part 100 and an inner wall 201 of the cover part 200, which is opposite in the normal direction N of the mounting plane M. The said inner walls 101, 201 delimit and / or enclose the exhaust duct 4 at least in sections.

[0053] The exhaust duct 4 has a duct longitudinal axis L (see Fig. 4) which extends longitudinally in a duct longitudinal plane E between the exhaust gas inlet opening 2 and the exhaust gas outlet opening 3. The duct longitudinal plane E is orthogonal to the mounting plane M and thus orthogonal to the vehicle outer wall W and extends vertically. The duct longitudinal axis L is curved longitudinally at least in sections. As a result of the curved longitudinal extent, the duct longitudinal axis L and thus also the exhaust duct 4 have differently oriented duct longitudinal directions at different positions along the duct longitudinal axis L. In other words, the direction of the duct longitudinal axis L is variable within the duct longitudinal plane E.

[0054] At the exhaust gas inlet opening 2, the channel longitudinal axis L has a first channel longitudinal direction L1. At the exhaust gas outlet opening 3, the channel longitudinal axis 4 has a third channel longitudinal direction L3. At a position P shown as an example in Fig. 4 downstream of the exhaust gas inlet opening 2 and upstream of the exhaust gas outlet opening 3, the channel longitudinal axis L has a second channel longitudinal direction L2.

[0055] In the embodiment shown, the first channel longitudinal direction L1 is oriented parallel to the normal direction N and thus orthogonal to the mounting plane M and the vehicle outer wall W. The first channel longitudinal direction L1 consequently points away from the mounting plane M and / or the vehicle outer wall W in the direction of the environment U. In other words, the first channel longitudinal direction L1 is oriented from the inside to the outside.

[0056] The second duct longitudinal direction L2 points towards the mounting plane M. The second duct longitudinal direction L2 is consequently rotated by more than 90° relative to the first duct longitudinal direction L1 in the duct longitudinal plane E. In the embodiment shown, the second duct longitudinal direction L2 points vertically downwards and horizontally inwards (in the mounted state of the wall chimney attachment 1). The third duct longitudinal direction L3, in turn, points away from the mounting plane M and / or the vehicle outer wall W. In the embodiment shown, the third duct longitudinal direction L3 is oriented vertically downwards and horizontally outwards (in the mounted state of the wall chimney attachment 1). In this case, an angle relative to the normal direction N is approximately 45°.

[0057] The exhaust gas from the heating device enters the exhaust duct 4 through the exhaust inlet opening 2 and initially flows from the inside to the outside, parallel to the normal direction N, along the first duct longitudinal direction L1. Due to the curved longitudinal extent of the exhaust duct 4, the exhaust flow is deflected vertically downward and horizontally inward before reaching position P. At position P, the exhaust flow flows along the second duct longitudinal direction L2. Downstream of position P, the exhaust flow is deflected horizontally outward.

[0058] The curved longitudinal extension of the exhaust duct 4, shown in detail in Fig. 4, and the associated double deflection of the exhaust gas flow, results in improved exhaust gas routing within the wall chimney attachment 1 and improved discharge of the exhaust gas into the environment U. The exhaust gas routing within the wall chimney attachment 1 is largely momentum-preserving. The discharge through the exhaust gas outlet opening 3 occurs in a free jet from the vehicle outer wall W to the outside and vertically downwards. The exhaust gas flow therefore leaves the exhaust gas outlet opening 3 without contacting the vehicle outer wall W. This counteracts contamination and discoloration. In addition, it is avoided that a fresh air intake provided in the area of ​​the wall chimney attachment 1 is impaired by the exhaust gas discharge. The said fresh air intake is optional and not provided in all embodiments.The fresh air intake will be explained in more detail with reference to the embodiment according to Figs. 14 to 21.

[0059] In the embodiment shown, the exhaust duct 4 has a variable duct width projected onto the mounting plane M, which increases from the exhaust inlet opening 2 towards the exhaust outlet opening 3. In the present case, the exhaust duct 4 has a first duct width B1 at the exhaust inlet opening 2 and a second duct width B2 at the exhaust outlet opening 3 (see in particular Fig. 3). By increasing the duct width along the longitudinal axis L of the duct, a further improved exhaust gas flow can be achieved. The aforementioned longitudinal curvature of the exhaust duct 4 is achieved in the embodiment shown by a specific design of the inner wall 101 of the attachment part 100 and the opposite inner wall 201 of the cover part 200.

[0060] Specifically, the inner wall 101 of the attachment part 100 in this case has a concave inner wall section 1011 (see in particular Fig. 4). The inner wall 201 of the cover part 200 is provided with a convex exhaust gas guide geometry G (see in particular Fig. 5). The above-described deflection of the exhaust gas flow takes place between the concave inner wall section 1011 and the convex exhaust gas guide geometry G. The exhaust gas duct 4 is accordingly curved longitudinally between the concave inner wall section 1011 and the convex exhaust gas guide geometry G, so that one can also speak of a curved longitudinally extended duct section 41.

[0061] The concave inner wall section 1011 is arranged vertically downwards relative to the exhaust gas inlet opening 2 and horizontally outwards offset along the normal direction N (in the assembled state of the wall chimney attachment 1). The inner wall section 1011 preferably has a constant wall thickness. An outer wall 102 of the attachment part 100, opposite the inner wall 101 counter to the normal direction N, is in this case convexly curved inwards. A front end (without reference symbol) of the inner wall 101, specifically of the concave inner wall section 1011, facing the environment U, delimits the exhaust gas outlet opening 3 on one side and merges into a drip section (not designated in more detail), which serves to improve the drainage of condensate. Such a drip section is explained in more detail below with reference to the embodiment according to FIGS. 14 to 21.

[0062] The exhaust gas guide geometry G protrudes from the inner wall 201 of the cover part 200 in the direction of the concave inner wall section 1011 and opposite to the normal direction N. The cover part 200 has an outer wall 202 opposite the inner wall 201 in the normal direction N. The outer wall 202 of the cover part 200 forms a visible surface S of the wall chimney attachment 1. In this case, the outer wall 202 is non-concave, in particular flat. A front end (without reference symbol) of the inner wall 201 facing the environment U, in particular of the exhaust gas guide geometry G, delimits the exhaust gas outlet opening 3 on one side.

[0063] In the embodiment shown, the convex exhaust guide geometry G comprises a plurality of exhaust guide elements 2011, 2012, 2013, 2014 arranged at a distance along the duct's longitudinal axis L. These can also be referred to as the first exhaust guide element 2011, the second exhaust guide element 2012, the third exhaust guide element 2013, and the fourth exhaust guide element 2014. The exhaust guide elements 2011 to 2014 each extend longitudinally parallel along the inner wall 201 (see in particular Fig. 3). The exhaust guide elements 2011 to 2014 each extend over the entire (variable) duct width of the exhaust duct 4.

[0064] The sequence of the exhaust gas guide elements 2011 to 2014 along the channel longitudinal axis L and thus along the exhaust gas flow follows the mentioned numbering, so that the first exhaust gas guide element 2011 is arranged furthest upstream and the fourth exhaust gas guide element 2014 is arranged furthest downstream.

[0065] In the embodiment shown, a total of four exhaust gas guide elements 2011 to 2014 are present. It is understood that in embodiments not shown in the figures, a different number of exhaust gas guide elements may also be present, for example at least three exhaust gas guide elements and / or more than the four exhaust gas guide elements shown here.

[0066] As shown in particular in Fig. 5, the exhaust guide elements 2011 to 2014 have different heights H1 to H4 with respect to the normal direction N. Consequently, the exhaust guide elements 2011 to 2014 protrude from the inner wall 201 in the direction of the concave inner wall section 1011 by different distances.

[0067] In particular, the first exhaust gas guide element 2011 has a first height H1. The second exhaust gas guide element 2012 has a second height H2. The third exhaust gas guide element 2013 has a third height H3. The fourth exhaust gas guide element 2014 has a fourth height H4. The heights H1 to H4 initially increase in the direction of flow and then decrease again. The first height H1 is less than the second height H2 and / or the third height H3. The second height H2 is greater than the first height H1 and less than the third height H3. In the present case, the second height H2 is additionally greater than the fourth height H4. The third height H3 is greater than the other heights H1, H2, H4. The fourth height H4 is less than the second height H2 and the third height H3 and corresponds approximately to the first height H1.

[0068] In the embodiment shown, the exhaust guide elements 2011 to 2014 are each designed as a rib Q. With respect to the longitudinal channel plane E, the ribs Q each have an approximately rectangular cross-sectional shape. Preferably, the ribs Q each taper opposite to the normal direction N.

[0069] The exhaust guide elements 2011 to 2014, specifically the ribs Q, are each an integral component of the cover part 200 in the embodiment shown. In this case, the cover part 200 is made in one piece from a plastic K. Production takes place by injection molding. In the embodiment shown, the attachment part 100 is also made in one piece from the said plastic K by injection molding.

[0070] In order to enable improved drainage of condensate from the exhaust gas flow from the exhaust gas guide elements 2011 to 2014, these are in this case slightly inclined vertically downwards and horizontally inwards within the duct longitudinal plane E (when the wall chimney attachment is installed). Furthermore, the exhaust gas guide elements 2011 to 2014 are inclined along their longitudinal extent oriented orthogonally to the duct longitudinal plane E and in this case are specifically curved, in particular convexly curved and / or concentrically curved around the exhaust gas inlet opening 2 (see Fig. 3). This inclination / curvature supports the drainage of condensate. In this case, the condensate flows in a viewing direction directed towards the installation plane M (see Fig. 3) due to gravity along the exhaust gas guide elements 2011 to 2014 and towards a central longitudinal plane of the wall chimney attachment 1, which in this case coincides with the duct longitudinal plane E. In the area of ​​the channel longitudinal plane E, a channel shown in Fig.1 to 5, a drip nose (not shown in detail) may be arranged, which enables controlled dripping of the condensate.

[0071] In the embodiment shown in Figs. 1 to 5, the attachment part 100 and the lid part 200 each have a circular outer contour. Such a design is advantageous, but not provided in all embodiments. For example, the embodiment according to Figs. 8 to 12 has a rectangular, specifically square, design of the attachment and lid parts.

[0072] Further with respect to the embodiment according to Figs. 1 to 5, the attachment part 100 has a pipe socket 103. The pipe socket 103 has the exhaust gas inlet opening 2 at one end. The pipe socket 103 forms and / or delimits a straight, elongated channel section 42 of the exhaust gas channel 4. The pipe socket 103 and thus also the straight, elongated channel section 42 are elongated parallel to the normal direction N. The pipe socket 103 and thus also the exhaust gas inlet opening 2 have a circular-cylindrical cross-sectional shape in the present case.

[0073] Furthermore, the attachment part 100 in the present case has a first web section 104 and a second web section 105. The two web sections 104, 105 each protrude outwards parallel to the normal direction N and thus horizontally from the inner wall 101. The first web section 104 is located radially inward with respect to the exhaust gas inlet opening 2, the second web section 105 is located radially outward. In addition, the two web sections 104, 105 are arranged offset outwards along the normal direction N relative to the exhaust gas inlet opening 2. Furthermore, the cover part 200 has a first complementary web section 204 and a second complementary web section 205, which can also be referred to as a collar section. The two complementary web sections 204, 205 protrude inwards from the inner wall 201 of the cover part 200, opposite to the normal direction N.When the wall chimney attachment 1 is assembled, the first web section 104 and the first complementary web section 204, as well as the second web section 105 and the second complementary web section 205, abut one another in a fluid-tight manner. The seal thus achieved between the attachment part 100 and the cover part 200 prevents an uncontrolled escape of exhaust gas from the exhaust duct 4.

[0074] The first web section 104 and the first complementary web section 204 are each optional. In further embodiments, the first web section 104 is provided and the first complementary web section 204 is not provided, or vice versa. If only one of the two first web sections 104, 204 is present, this serves in particular to (improve) the exhaust gas flow. If both first web sections 104, 204 are present, this serves the aforementioned fluid-tight seal, whereby improved mechanical stability can also be achieved.

[0075] As can be seen in Fig. 1, the first complementary web section 204 and the second web section 105 and the wall sections of the attachment part 100 and the cover part 200 that are opposite one another in the region of these web sections in the normal direction N enclose a cavity H. The cavity H can be designed to accommodate an insulating material, a sensor, or the like. An insulating material is preferably arranged in the cavity H. Alternatively or additionally, such an insulating material can be arranged on the side of the attachment part 100 that is opposite the cavity H along the normal direction N and that faces the vehicle outer wall W in the assembled state. The insulating material can be, for example, a fiberglass material. For further improved insulation, the first web section 104 and the first complementary web section 204 are preferably perforated, in particular perforated.

[0076] In the embodiment shown, the aforementioned web sections 104, 105 and the complementary web sections 204, 205 are each longitudinally extended concentrically around the exhaust gas inlet opening 2 (see in particular Fig. 3). This also applies in this case to the exhaust gas guide elements 2011 to 2014.

[0077] 6 and 7 show a chimney adapter part 300 which is intended for use with the wall chimney attachment 1. When mounted on the vehicle outer wall W, the chimney adapter part 300 projects from the inside to the outside through an opening made in the vehicle outer wall W. A rear side 301 of the chimney adapter part 300 lies flat on the vehicle outer wall W. The chimney adapter part 300 has an exhaust pipe section 302 which extends longitudinally between an inner pipe end 3021 and an outer pipe end 3022. In the mounted state, the pipe socket 103 of the chimney attachment 1 is plugged together with the outer pipe end 3022. The inner pipe end 3021 is designed for the exhaust gas-carrying connection to the heating device. The chimney adapter part 300 also has an air supply pipe section 303.The supply air pipe section 303 is designed to supply combustion air to the heating device and, for this purpose, is fluidly connected at its outer pipe end (without reference symbol) to a fresh air inlet opening formed between the chimney adapter part 300 and the cover part 100. This aspect will be discussed in more detail below with reference to the embodiment according to Figs. 14 to 21. The inner pipe end (without reference symbol) of the supply air pipe section 303 is designed to connect to the heating device for the purpose of conveying fresh air. The exhaust pipe section 302 lies within a cross-section of the supply air pipe section 303, so that the two pipe sections form a pipe-in-pipe arrangement. This also applies to the further course of the exhaust gas and fresh air ducts extending in the direction of the heating device.

[0078] In an assembled state, the wall chimney attachment 1 and the chimney adapter part 300 form an arrangement as will be explained in more detail below with reference to the embodiment according to Figs. 14 to 21.

[0079] Figs. 8 to 12 show a further embodiment of a wall-mounted chimney cap 1a according to the invention. In terms of its function and design, the wall-mounted chimney cap 1a is essentially identical to the wall-mounted chimney cap 1 shown in Figs. 1 to 5. Identical or essentially identical features will not be explained again to avoid repetition. Instead, what has already been disclosed for the embodiment shown in Figs. 1 to 5 applies to the embodiment shown in Figs. 8 to 12, mutatis mutandis. Only differing or additional features of the embodiment shown in Figs. 8 to 12 are described in detail below.

[0080] The main difference between the wall-mounted chimney attachment 1a is its rectangular and, in particular, square design. Both the cover part 100a and the lid part 200a have a square outer contour. Accordingly, in contrast to the embodiment according to Figs. 1 to 5, the collar section 205a is not circularly cylindrical, but instead is designed in the shape of a square cylinder. The collar section 205a and thus the cover part 200a consequently have an upper side 2051a, a lower side 2052a, a front side 2053a, and a rear side 2054a. In the assembled state, the upper side 2051a and the lower side 2052a lie opposite one another with respect to a vertically oriented vehicle vertical axis. The front side 2053a and the rear side 2054a lie opposite one another with respect to a horizontally oriented vehicle longitudinal axis. This is especially the case if the wall chimney attachment 1a is attached to the left-hand exterior wall of the vehicle.If attachment to the rear wall of a vehicle is possible in principle, the orientation of the said sides 2053a and 2054a will be changed accordingly with respect to the vehicle axes.

[0081] Furthermore, in contrast to the embodiment according to Figs. 1 to 5, the exhaust gas guide elements 2011a to 2014a are not concentric around the exhaust gas inlet opening 2a, but instead are straight and parallel in length (see Fig. 10).

[0082] Furthermore, in contrast to the embodiment according to Figs. 1 to 5, the first web section 104a is arranged radially offset further outward relative to the exhaust gas inlet opening 2a. This forms an annular channel section 43a of the exhaust gas channel (see Figs. 10 and 11).

[0083] As further shown in Fig. 12, the convex inner wall section is divided into two parts with respect to the channel width of the exhaust duct 4a and has a first convex inner wall section 1011a and a second convex inner wall section 1011a'. The two inner wall sections 1011a, 1011a' can also be referred to as the left convex inner wall section 1011a and the right convex inner wall section 1011a' with respect to the plane of the drawing in Fig. 12. Between the two convex inner wall sections 1011a, 1011a', the attachment part 101a in this case has a drip wall section 106a. The drip wall section 106a extends radially from the inside to the outside with respect to the exhaust gas inlet opening 2a and, unlike the inner wall sections 1011a, 1011a', does not have a convex shape in the present case. In an embodiment not shown in the figures, the drip wall section has such a convex shape.The drip wall section 106a enables improved dripping or drainage of condensate along the inner wall 101a of the attachment part 100a.

[0084] Fig. 13 shows a further embodiment of a wall chimney attachment 1b according to the invention. Its structure and function are also essentially identical to the two wall chimney attachments 1, 1a already described. To avoid repetition, only different or additional features will be explained. In contrast to the wall chimney attachments 1, 1a according to Figs. 1 to 5 and 8 to 12, the wall chimney attachment 1b has a functional wall section F. The functional wall section F is arranged downstream of the exhaust gas inlet opening 2b and upstream of the exhaust gas guide geometry (without reference symbol in Fig. 13) and serves, on the one hand, to deflect the exhaust gas flow flowing through the exhaust gas inlet opening 2b into the pipe socket 103b in the direction of the exhaust gas outlet opening 3b.For the purpose of deflection, the functional wall section F extends vertically from top to bottom and horizontally from inside to outside within the duct's longitudinal plane E (when the wall chimney attachment 1b is installed). In addition, the functional wall section F serves to thermally shield the outer wall 202b of the cover part 200b from the heat of the exhaust gas flow. This prevents the outer wall 202b from becoming excessively heated and / or discolored.

[0085] In the embodiment shown in Fig. 13, the functional wall section is a wall section 108b of the attachment part 100b. The wall section 108b is an integral component of the attachment part 100b, which is manufactured in one piece.

[0086] In an embodiment not shown in the figures, the functional wall section is formed by a wall section of the cover part which is arranged at a distance relative to the inner wall 201b in the direction of the exhaust gas inlet opening 2b.

[0087] Figs. 14 to 18 show an arrangement 10 comprising a wall chimney attachment 1c and a chimney adapter part 300c. The design and function of the wall chimney attachment 1c and the chimney adapter part 300c are essentially identical to the design and function of the wall chimney attachments 1, 1a, 1b and the chimney adapter part 300, respectively, as already described with reference to Figs. 1 to 5, 8 to 12, 13, and 6 and 7. What is disclosed therein also applies, mutatis mutandis, to the wall chimney attachment 1c and the chimney adapter part 300c. To avoid repetition, the following primarily describes essential differences and additional features.

[0088] The chimney adapter part 300c has through holes T (see Fig. 19) that serve to accommodate fastening screws (without reference numerals, see Figs. 14, 16). The chimney adapter part 300c can be screwed to the vehicle's outer wall W using the fastening screws. The rear side 301c of the chimney adapter part 300c rests flat and fluid-tight against the vehicle's outer wall W.

[0089] In the assembled state of the assembly 10 shown in Figs. 14 to 18, the attachment part 100c is locked to the chimney adapter part 300c. Furthermore, the pipe socket 103c is connected in a fluid-tight manner to the outer pipe end 3022c of the exhaust pipe section 302c (see in particular Fig. 16).

[0090] For locking purposes, the chimney adapter part 300c has several locking geometries R1', R2', R3' arranged offset in the circumferential direction of the chimney adapter part 300c (see Figs. 19, 20). In the present case, three locking geometries RT, R2', R3' are provided, each offset by 120° in the circumferential direction. The locking geometries RT, R2', R3' are locked to complementary locking geometries of the attachment part 100c (not shown in detail).

[0091] The cover part 200c is locked to the attachment part 100c. For this purpose, several locking connections are provided, arranged offset in the circumferential direction of the two parts 100c, 200c (see Figs. 16, 17). Only one locking connection R1 of the several locking connections is shown in detail in the partially cutaway Figs. 16 and 17. Said locking connection R1 is formed between a locking section 120c of the attachment part 100c and a complementary locking section 220c of the cover part 200c (see Fig. 17).

[0092] The exhaust gas duct 4c is formed between the attachment part 100c and the cover part 200c in the manner already explained with reference to the previous embodiments, wherein the attachment part 100c in turn has a concave inner wall section 1011c and the cover part 200c is provided with an exhaust gas guide geometry with a plurality of exhaust gas guide elements 2011c to 2014c.

[0093] As shown particularly in Figs. 14, 16, and 21, the concave inner wall section 1011c transitions into a drip section 110c. The drip section 110c is directly adjacent to the exhaust gas outlet opening 3c and serves to improve the drainage of condensate from the concave inner wall section 1011c.

[0094] The arrangement 10 also has a fresh air inlet opening 5c, which opens from the surroundings U into the supply air pipe section 303c. The fresh air inlet opening 5c ​​is formed here between a front side 304c of the chimney adapter part 300c, opposite the rear side 301c, and the outer wall 102c of the attachment part 100c. In the assembled state shown, the outer wall 102c faces the vehicle's outer wall W.

[0095] The exhaust outlet opening 3c is located further away from the vehicle outer wall W along the normal direction N of the mounting plane M and thus orthogonally thereto than the fresh air inlet opening 5c. In other words, the exhaust outlet opening 3c is offset outward relative to the fresh air inlet opening 5c. In this case, the fresh air is drawn in through the fresh air inlet opening 5c ​​along the vehicle outer wall W. In contrast, the specific and previously explained design of the exhaust gas routing and exhaust gas discharge ensures that the exhaust gas flow is directed away from the vehicle outer wall W.

[0096] In the embodiment shown, the exhaust gas outlet opening 3c and the fresh air inlet opening 5c ​​are arranged on a common side of the arrangement 10, which in this case is a / the underside of the arrangement 10. Said underside is oriented vertically downward in the assembled state of the arrangement 10.

[0097] As can be seen in particular in Fig. 21, the exhaust gas outlet opening 3c and the fresh air inlet opening 5c ​​are essentially identically dimensioned.

[0098] In this case, the arrangement 10 also has an additional fresh air inlet opening 5c' (see Figs. 16, 17), which, when the arrangement 10 is mounted on the vehicle, is formed between the wall chimney attachment 1c and the vehicle's outer wall W. The additional fresh air inlet opening 5c' forms a main inlet for the fresh air, and the fresh air inlet opening 5c ​​forms an additional inlet for the fresh air in addition to the main inlet. The intake of fresh air through the main inlet (additional fresh air inlet opening 5c') and the additional inlet (fresh air inlet opening 5c) are symbolized by corresponding arrows in Figs. 16 and 17.

[0099] In addition, the chimney adapter part 300c has a retaining web 315c protruding from the front side 304c. The retaining web 315c is concentric and extends approximately 180° around the outer pipe end 3022c of the exhaust pipe section 302c. The retaining web 315 is arranged on a side of the fresh air inlet opening 5c ​​opposite the outer pipe end 3022c and is configured to counteract any impairment of the fresh air intake caused by changing wind conditions in the environment U (see Fig. 19).

Claims

Patent claims 1. Wall chimney attachment (1, 1a, 1b, 1c) for a heating device of a vehicle, in particular a caravan or motor caravan, comprising an attachment part (100, 100a, 100b, 100c) with a mounting plane (M) which, in an assembled state of the wall chimney attachment (1, 1a, 1b, 1c), is aligned parallel to an outer wall (W) of the vehicle, a cover part (200, 200a, 200b, 200c) which is joined to the attachment part (100, 100a, 100b, 100c) and covers the attachment part (100, 100a, 100b, 100c) in a viewing direction directed towards the mounting plane (M), an exhaust gas inlet opening (2, 2a, 2b, 2c), which is arranged on the attachment part (100, 100a, 100b, 100c) and is designed for exhaust gas-carrying connection to the heating device, an exhaust gas outlet opening (3, 3a, 3b, 3c), which is arranged on the attachment part (100, 100a, 100b, 100c) and / or the cover part (200, 200a, 200b, 200c) and opens into an environment (U), and an exhaust gas duct (4, 4a, 4b, 4c),which is formed between an inner wall (101) of the attachment part (100, 100a, 100b, 100c) and an inner wall (201) of the cover part (200, 200a, 200b, 200c) lying opposite in the normal direction (N) of the mounting plane (M) and connects the exhaust gas inlet opening (2, 2a, 2b, 2c) to the exhaust gas outlet opening (3, 3a, 3b, 3c) in an exhaust gas-conducting manner, wherein the exhaust gas duct (4, 4a, 4b, 4c) has a duct longitudinal axis (L) which is arranged in a duct longitudinal plane (E) oriented orthogonally to the mounting plane (M) and is curved at least in sections, wherein the exhaust gas duct (4, 4a, 4b, 4c) as a result of the at least partially curved Longitudinal extension of the channel longitudinal axis (L) at different positions along the channel longitudinal axis (L) has differently oriented channel longitudinal directions (L1, L2, L3), wherein a first channel longitudinal direction (L1) at the exhaust gas inlet opening (2, 2a, 2b, 2c) points away from the mounting plane (M),wherein a second channel longitudinal direction (L2) between the exhaust gas inlet opening (2, 2a, 2b, 2c) and the exhaust gas outlet opening (3, 3a, 3b, 3c) points towards the mounting plane (M), and wherein a third channel longitudinal direction (L3) at the exhaust gas outlet opening (3, 3a, 3b, 3c) points away from the mounting plane (M).

2. Wall chimney attachment (1, 1a, 1b, 1c) according to claim 1, wherein the exhaust gas duct (4, 4a, 4b, 4c) has a duct width (B1, B2) projected onto the mounting plane (M) which is along the Channel longitudinal axis (L) increases, preferably continuously, starting from the exhaust gas inlet opening (2, 2a, 2b, 2c) in the direction of the exhaust gas outlet opening (3, 3a, 3b, 3c).

3. Wall chimney attachment (1, 1a, 1b, 1c) according to claim 1 or 2, wherein a channel section (41) of the exhaust gas channel (4, 4a, 4b, 4c) which is curved and elongated in the channel longitudinal plane (E) is formed between a concave inner wall section (1011) of the inner wall (101) of the attachment part (100, 100a, 100b, 100c) and a convex exhaust gas guide geometry (G) arranged on the inner wall (201) of the cover part (200, 200a, 200b, 200c).

4. Wall chimney attachment (1, 1a, 1b, 1c) according to claim 3, wherein the convex exhaust gas guide geometry (G) protrudes from the inner wall (201) of the cover part (200, 200a, 200b, 200c), wherein the cover part (200, 200a, 200b, 200c) has an outer wall (202, 202a, 202b, 202c) which lies opposite the convex exhaust gas guide geometry (G) in the normal direction (N) of the mounting plane (M) and is non-concave, preferably flat, and wherein the outer wall (202, 202a, 202b, 202c) forms a visible surface (S) of the wall chimney attachment (1, 1a, 1b, 1c).

5. Wall chimney attachment (1, 1a, 1b, 1c) according to claim 3 or 4, wherein the convex exhaust gas guide geometry (G) is formed by a plurality of exhaust gas guide elements (2011, 2012, 2013, 2014) arranged at a distance along the longitudinal axis (L) of the channel, each of which extends longitudinally along the inner wall (201) of the cover part (200, 200a, 200b, 200c), preferably in parallel.

6. Wall chimney attachment (1, 1a, 1b, 1c) according to claim 5, wherein the exhaust gas guide elements (2011, 2012, 2013, 2014) are each designed as a rib (Q).

7. Wall chimney attachment (1, 1a, 1b, 1c) according to claim 5 or 6, wherein the exhaust gas guide elements (2011, 2012, 2013, 2014), in particular the ribs (Q), for forming the convex shape of the exhaust gas guide geometry (G) in relation to the normal direction (N) of the mounting plane (M) have different heights (H1, H2, H3, H4), in particular wherein the different heights (H1, H2, H3, H4) of the ribs (Q) along the channel longitudinal axis (L) starting from the exhaust gas inlet opening (2, 2a, 2b, 2c) in the direction of the exhaust gas outlet opening (3, 3a, 3b, 3c) initially increase and then decrease.

8. Wall chimney attachment (1, 1a, 1b, 1c) according to one of claims 5 to 7, wherein the exhaust gas guide elements (2011, 2012, 2013, 2014), in particular the ribs (Q), are arranged relative to an imaginary horizontal orientation, each protrude at an inclination from the inner wall (201) of the cover part (200, 200a, 200b, 200c) and / or are each extended at an inclination longitudinally to allow condensate to flow away.

9. Wall chimney attachment (1, 1a, 1b, 1c) according to one of the preceding claims, wherein the The cover part (200, 200a, 200b, 200c) is made in one piece from plastic (K).

10. Wall fireplace attachment (1, 1a, 1b, 1c) according to one of the preceding claims, wherein the cover part (200c) and the attachment part (100c) are joined together by means of a snap-in connection (R1).

11. Wall chimney attachment (1, 1a, 1b, 1c) according to one of the preceding claims, further comprising a functional wall section (F) which is arranged downstream of the exhaust gas inlet opening (2b) and is designed to deflect an exhaust gas flow flowing in through the exhaust gas inlet opening (2b) in the direction of the exhaust gas outlet opening (3b) and / or to thermally shield an outer wall (202b) of the cover part (200b) from the exhaust gas flow.

12. Wall chimney attachment (1, 1a, 1b, 1c) according to one of the preceding claims, wherein the attachment part (100, 100a, 100b, 100c) has a pipe socket (103, 103a, 103b, 103c) which has the exhaust gas inlet opening (2, 2a, 2b, 2c) at one end and forms a straight, elongated channel section (42) of the exhaust gas channel (4, 4a, 4b, 4c), wherein the pipe socket (103, 103a, 103b, 103c) is designed to be plugged together with an exhaust pipe section (302, 302c) of a chimney adapter part (300, 300c) which, in the assembled state, projects through an opening in the vehicle outer wall (W).

13. Arrangement (10) with a wall chimney attachment (1c) according to one of the preceding claims and with a chimney adapter part (300c), wherein the chimney adapter part (300c) has an air supply pipe section (303c) which is designed to supply combustion air to the heating device, and an exhaust pipe section (302c) arranged in a cross section of the air supply pipe section (303c), wherein the exhaust pipe section (302c) opens into the exhaust gas inlet opening (2c) of the wall chimney attachment (1c), and wherein a fresh air inlet opening (5c) opening from the environment (U) into the air supply pipe section (303c) is formed between the attachment part (100c) and the chimney adapter part (300c).

14. Arrangement (10) according to claim 13, wherein the wall chimney attachment (1c) is designed to form a further fresh air inlet opening (5c') which, in the vehicle-mounted state of the arrangement (10), is formed between the wall chimney attachment (1c) and the vehicle outer wall (W), wherein the further fresh air inlet opening (5c') forms a main inlet and the fresh air inlet opening (5c) forms an additional inlet for the fresh air.

15. Arrangement (10) according to claim 13 or 14, wherein the exhaust gas outlet opening (3c) is arranged above the fresh air inlet opening (5c) and / or the further fresh air inlet opening (5c') with respect to the normal direction (N) of the mounting plane (M).

16. Arrangement (10) according to one of claims 13 to 15, wherein the exhaust gas outlet opening (3c) and the fresh air inlet opening (5c) are arranged on a common side, preferably a bottom side, of the arrangement (10) and / or are oriented identically.

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