CN214464509U - Exhaust device and engine - Google Patents

Abstract

The utility model provides an exhaust apparatus and engine relates to engine technical field. The exhaust device of the utility model comprises at least two shells and a second clapboard which are arranged in sequence from inside to outside, a heat insulation cavity is formed between two adjacent shells, and the inner wall and/or the outer wall of at least one heat insulation cavity are coated with heat insulation coatings respectively; the shell positioned on the innermost layer is suitable for forming an exhaust channel, and a plurality of second partition plates are sequentially distributed in the exhaust channel along the extending direction of the exhaust channel. The utility model discloses an exhaust apparatus has scald preventing and noise reduction's function concurrently, and the security is high, experiences and feels, and the practicality is strong.

Description

Exhaust device and engine

Technical Field

The utility model relates to an engine technical field particularly, relates to an exhaust apparatus and engine.

Background

In some occasions, attention is particularly paid to protection in the transportation of high-temperature gas, for example, in the exhaust of an engine, the temperature of the gas inside the engine is high, the exhaust noise is high, scalding and noise pollution are easily caused to a human body, certain potential safety hazards exist, and the experience feeling is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the problem that how to improve exhaust apparatus's barrier propterty and experience sense to a certain extent.

In order to solve at least one aspect of the above problems to at least a certain extent, the present invention provides an exhaust apparatus, comprising at least two shells and a second partition plate, which are sequentially arranged from inside to outside, wherein a heat insulation cavity is formed between two adjacent shells, and the inner wall and/or the outer wall of at least one heat insulation cavity are/is coated with a heat insulation coating respectively; the casing located on the innermost layer is suitable for forming an exhaust channel, a plurality of second partition plates are sequentially distributed in the exhaust channel along the extending direction of the exhaust channel, and each second partition plate is provided with a plurality of third through holes.

From this, heat in the thermal-insulated chamber can be better to exhaust passage keeps apart, avoids exhaust apparatus's overheated leading to scalding in surface, and the setting of second baffle can increase exhaust apparatus's bulk rigidity to a certain extent, converts the exhaust passage that the cross-sectional area is great into the less third through hole of a plurality of cross-sectional areas in order to realize exhausting, has the effect of noise reduction to a certain extent, exhaust apparatus has scald prevention and noise reduction's function concurrently, and the security is high, and experience is felt, and the practicality is strong.

Optionally, the heat insulation cavity located at the innermost layer is a second heat insulation cavity, the second heat insulation cavity is filled with heat insulation materials, and/or the second heat insulation cavity is arranged in a vacuum mode, and/or the inner wall and/or the outer wall of the second heat insulation cavity are coated with the heat insulation coatings respectively.

From this, the thermal-insulated chamber of second has good thermal-insulated effect to exhaust apparatus can obtain better barrier propterty, and the practicality is strong.

Optionally, the third through holes on two adjacent second partition plates are distributed in a staggered manner.

Therefore, in the exhaust process, the whole flow path of the gas is a bent path, the exhaust noise can be reduced to a certain degree, and the use experience is improved.

Optionally, at least two of the second separators in all the second separators are sequentially attached to form a separator group;

the third through holes on all the second partition plates of the partition plate group are communicated in sequence to form a plurality of spiral exhaust channels.

From this, adopt spiral exhaust passage to realize exhausting, it is smooth and easy to exhaust, and its noise is littleer, can realize the amortization to a great extent to, the second baffle of baffle group laminates mutually in proper order, and the second baffle also can realize thermal-insulated to a certain extent, and the temperature in the thermal-insulated chamber that is located the inlayer will reduce to a certain extent, and exhaust apparatus's scalding prevention performance is also better.

Optionally, all the second partition plates of the partition plate group are provided with at least one fourth through hole and a plurality of third through holes corresponding to the fourth through holes, and the plurality of third through holes are uniformly distributed along the circumferential direction of the fourth through holes;

the fourth through holes on all the second partition plates of the partition plate group are communicated in sequence to form a first exhaust channel; the plurality of spiral exhaust passages of the separator group are arranged around the first exhaust passage.

Therefore, the actual exhaust channel (the first exhaust channel and the spiral exhaust channel) of the exhaust device can obtain a larger cross-sectional area, the exhaust device is prevented from being overlarge in size, the space utilization rate is improved, and the practicability is high.

Optionally, the casing located at the outermost layer is a first casing, and the cross section of the first casing is in an oval shape or a waist-round shape.

Thus, the elliptical or oval shape is high in structural stability, and it is possible to set the arrangement of the exhaust devices according to the specific spatial structure, for example, when the space in the up-down direction is insufficient, the short side of the elliptical or oval shape is set to be arranged in the up-down direction, and when the space in the left-right direction is insufficient, the short side of the elliptical or oval shape is set to be arranged in the left-right direction.

Optionally, include at least three the casing forms at least two thermal-insulated chamber, wherein is located outmost the thermal-insulated chamber is first thermal-insulated chamber, is located outmost the casing is first casing on the cross section of first casing, first casing is including being located first straight line direction ascending first end and being located second straight line direction ascending second end, first thermal-insulated chamber is in the thickness of first end department is greater than first thermal-insulated chamber is in the thickness of second end department, first straight line direction with second straight line direction is the setting of predetermineeing the contained angle.

From this, the setting in two thermal-insulated chambeies can further increase the isolation effect of keeping apart the heat in to exhaust passage, avoids the overheated scald that leads to of first casing to, the temperature of first end is less than the temperature of second end on the first casing, can set up first end in being close to human and/or naked one side, reduces the risk of scald, can promote exhaust apparatus's protective properties and experience sense to a certain extent, and the practicality is strong.

Optionally, at least three housings are included to form at least two heat insulation cavities, wherein the heat insulation cavity located at the outermost layer is a first heat insulation cavity, and a first through hole suitable for communicating with the external environment is arranged on the first heat insulation cavity.

From this, two thermal-insulated chambeies can better keep apart the heat, further reduce the surface temperature of first casing to, first thermal-insulated intracavity portion and external environment intercommunication can accelerate its heat exchange, further reduce the surface temperature of this first casing, and the practicality is strong.

Optionally, the exhaust device is an exhaust pipe and/or a muffler of an engine.

Therefore, the exhaust pipe and/or the silencer can be prevented from scalding a human body to a certain degree, reliability is high, and practicability is high.

Another aspect of the present invention provides an engine, including an exhaust apparatus as described above. The engine has all the advantages of the exhaust device, and the details are not described here.

Drawings

Fig. 1 is a schematic structural diagram of an exhaust apparatus including two housings according to an embodiment of the present invention;

FIG. 2 is a right side view of the exhaust apparatus of FIG. 1;

fig. 3 is a schematic cross-sectional view of the exhaust apparatus including two housings according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of an exhaust apparatus including three housings according to another embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of an exhaust apparatus including three housings according to another embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of an exhaust apparatus including three housings according to another embodiment of the present invention.

Description of reference numerals:

1-shell, 11-first shell, 111-first shell body, 112-first projecting structure, 113-first end, 114-second end, 2-heat insulation cavity, 21-first heat insulation cavity, 211-first partition board, 2111-second through hole, 22-second heat insulation cavity, 3-exhaust channel, 31-second partition board, 311-third through hole, 312-fourth through hole, 4-connecting flange and 5-waterproof cap.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the terms "an embodiment," "one embodiment," "some embodiments," "exemplary" and "one embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In the drawings, the Z-axis represents the vertical, i.e., up-down, position, and the positive direction of the Z-axis (i.e., the arrow of the Z-axis points) represents up, and the negative direction of the Z-axis (i.e., the direction opposite to the positive direction of the Z-axis) represents down; in the drawings, the X-axis represents a horizontal direction and is designated as a left-right position, and a positive direction of the X-axis (i.e., an arrow direction of the X-axis) represents a right side and a negative direction of the X-axis (i.e., a direction opposite to the positive direction of the X-axis) represents a left side; in the drawings, the Y-axis indicates the front-rear position, and the positive direction of the Y-axis (i.e., the arrow direction of the Y-axis) indicates the front side, and the negative direction of the Y-axis (i.e., the direction opposite to the positive direction of the Y-axis) indicates the rear side; it should also be noted that the foregoing Z-axis, Y-axis, and X-axis representations are merely intended to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides an exhaust apparatus, including at least two shells 1 and a second partition 31 sequentially arranged from inside to outside, a thermal insulation cavity 2 is formed between two adjacent shells 1, and an inner wall and/or an outer wall of at least one thermal insulation cavity 2 is coated with a thermal insulation coating respectively; the casing 1 located at the innermost layer is suitable for forming the exhaust channel 3, a plurality of second partition plates 31 are sequentially distributed in the exhaust channel 3 along the extending direction of the exhaust channel 3, and each second partition plate 31 is provided with a plurality of third through holes 311.

It should be noted that the present specification will describe the contents and specific effects of the present invention by taking the exhaust device as an example (for example, the exhaust device is an exhaust pipe or a muffler) applied to an engine, but the present invention is not limited thereto, and can also be applied to other similar applications.

Illustratively, the plurality of second partition plates 31 are equidistantly distributed along the extending direction of the exhaust passage 3 and divide the exhaust passage 3 into a plurality of chambers, and the adjacent two chambers are communicated through the third through holes 311.

Illustratively, all the second partition plates 31 are sequentially attached along the extending direction of the exhaust passage 3, and the third through holes 311 on two adjacent second partition plates 31 are communicated, for example, the third through holes 311 on two adjacent second partition plates 31 are communicated and coaxially arranged, so as to form a plurality of sub-exhaust passages.

It should be noted that, the position and the number of the third through holes 311 on each second partition plate 31 are selected according to actual needs, and are not limited, and of course, the sum of the cross-sectional areas of all the third through holes 311 on each second partition plate 31 should be as large as possible to meet the requirement of greater exhaust and achieve higher space utilization. The thermal barrier coating and the sound insulation material can adopt the related prior art, for example, the sound insulation material can be a polyester fiber sound absorption plate.

The benefit that sets up like this lies in, thermal-insulated chamber 2 can be better keeps apart the heat in exhaust duct 3, avoid exhaust apparatus's overheated leading to the scald in surface, the setting of second baffle 31, can increase exhaust apparatus's bulk rigidity to a certain extent, convert the exhaust duct 3 that the cross-sectional area is great into the less third through hole 311 of a plurality of cross-sectional areas in order to realize exhausting, the effect of noise reduction has to a certain extent, exhaust apparatus has scald prevention and noise reduction's function concurrently, the security is high, experience feels, therefore, the clothes hanger is strong in practicability.

In the above embodiment, as shown in fig. 3, the insulation chamber 2 located at the innermost layer is a second insulation chamber 22, the second insulation chamber 22 is filled with insulation material, and/or the second insulation chamber 22 is vacuum-disposed, and/or the inner wall and/or the outer wall of the second insulation chamber 22 are coated with insulation coating respectively.

Specifically, the thermal insulation material and the thermal insulation coating may adopt the related art, which is not limited, for example, the thermal insulation material may be a glass cloth, and the thermal insulation coating may be a zirconium dioxide coating.

The advantage of this arrangement is that the second insulating chamber 22 has a good insulating effect, so that the exhaust device can obtain better protection performance, and the practicability is strong.

In some embodiments, the third through holes 311 on two adjacent second partition plates 31 are distributed in a staggered manner. That is, the two third through holes 311 of the two adjacent second partition plates 31 are not arranged coaxially.

The advantage of setting up like this is that, in the exhaust process, the whole tortuous path that is of gaseous flow path, and it can reduce exhaust noise to a certain extent, improves the use experience.

As shown in fig. 3, 5 and 6, at least two second separators 31 of all the second separators 31 are sequentially attached to form a separator group along the extending direction of the exhaust passage 3;

the third through holes 311 of all the second separators 31 of the separator group are sequentially communicated to form a plurality of spiral exhaust passages.

It should be noted that the number of the separator groups may be one or more, and when the number of the separator groups is one, the gas flows smoothly in the exhaust apparatus, and no turbulence is formed in the exhaust apparatus due to the gap between two adjacent second separators 31. While the second partition 31 itself can provide some thermal insulation.

Illustratively, when the number of the third through holes 311 is three and is respectively a fifth through hole, a sixth through hole and a seventh through hole (the technical solution of three third through holes 311 is not shown in the figure), all the fifth through holes of the partition plate group are sequentially communicated to form a first spiral exhaust channel, all the sixth through holes of the partition plate group are sequentially communicated to form a second spiral exhaust channel, and all the seventh through holes of the partition plate group are sequentially communicated to form a third spiral exhaust channel. For example, the first spiral exhaust channel, the second spiral exhaust channel and the third spiral exhaust channel all rotate around the same axis, and in the gas exhaust direction, gas is exhausted in the first spiral exhaust channel, the second spiral exhaust channel and the third spiral exhaust channel in a clockwise rotation mode.

The benefit that sets up like this lies in, adopts spiral exhaust passage to realize exhausting, and it is smooth and easy to exhaust, and its noise is littleer, can realize the amortization to a great extent to, the second baffle 31 of baffle group laminates mutually in proper order, and second baffle 31 also can realize thermal-insulated to a certain extent, and the temperature that is located the thermal-insulated chamber 2 of inlayer will reduce to a certain extent, and exhaust apparatus's anti-scalding performance is also better.

As shown in fig. 5 and 6, all the second partition plates 31 of the partition plate group are provided with at least one fourth through hole 312 and a plurality of third through holes 311 arranged corresponding to the fourth through hole 312, and the plurality of third through holes 311 are uniformly distributed along the circumferential direction of the fourth through hole 312;

the fourth through holes 312 on all the second partition plates 31 of the partition plate group are sequentially communicated to form a first exhaust channel; the plurality of spiral exhaust passages of the separator group are arranged around the first exhaust passage.

It should be noted that the number and size of the third through holes 311 and the fourth through holes 312 are determined according to the specific structure and size of the exhaust passage 3. Illustratively, when the fourth through holes 312 are provided as one, and the number of the third through holes 311 is three, the first spiral exhaust passage, the second spiral exhaust passage, and the third spiral exhaust passage are all provided around the first exhaust passage and are uniformly distributed on a circumference coaxial with the third through holes 311.

The advantage that sets up like this lies in, can ensure that exhaust apparatus's actual exhaust passage (first exhaust passage and spiral exhaust passage) can gain great cross-sectional area, avoids exhaust apparatus's volume too big, improves space utilization, and the practicality is strong.

As shown in fig. 4 and 5, in the embodiment of the present invention, at least three housings 1 are included and at least two thermal insulation chambers 2 are formed, wherein the thermal insulation chamber 2 located at the outermost layer is a first thermal insulation chamber 21, the housing 1 located at the outermost layer is a first housing 11, on the cross section of the first housing 1, the first housing 1 includes a first end 113 located at the first linear direction and a second end 114 located at the second linear direction, the thickness of the first thermal insulation chamber 21 at the first end 113 is greater than the thickness of the first thermal insulation chamber 21 at the second end 114, and the first linear direction and the second linear direction are set at a predetermined included angle.

For example, when the exhaust device is applied to an engine, the temperature of the first end 113 of the first casing 1 will be lower than that of the second end 114, so that scald caused by touching the first end 113 with a human body can be avoided to some extent. The predetermined included angle may be 10 deg. -90 deg., such as 30 deg., 45 deg., 60 deg., 90 deg., etc., and is shown in fig. 5 as 90 deg., depending on the particular configuration of the exhaust.

Here, it should be noted that the thickness of the first insulating chamber 21 at the first end 113 is greater than the thickness difference of the first insulating chamber 21 at the second end 114, which can be realized by the structural shape of at least one housing 1 forming the first insulating chamber 21.

As shown in fig. 4, the first housing 11 illustratively includes a first housing body 111 and a first protruding structure 112, and the first housing body 111 and the first protruding structure 112 are connected and enclose an outer wall forming the first insulating chamber 21, which will not be described in detail herein.

The first protruding structure 112 is not limited in structure, and may be, for example, a structure protruding from the first casing body 111 to a side away from the center of the exhaust passage 3, such as an angle-shaped structure (not shown in the figure), without limitation.

The projection of the first protruding structure 112 on the cross section of the first housing 11 is preferably an arc-shaped structure, and the first protruding structure 112 and the first housing body 111 are in transitional connection through structures such as an arc surface. Thus, the first projection structure 112 has high structural stability, and the arc-shaped structure has higher stability, smaller contact surface with the human body and smaller possibility of scalding compared with other structures (such as a plane).

In other embodiments, the first housing 11 includes a plurality of first protruding structures 112, the plurality of first protruding structures 112 are distributed along a circumferential direction of the first housing 11, and two adjacent first protruding structures 112 are disposed at intervals. That is, the first housing 11 includes a plurality of the first ends and a plurality of the second ends (not shown), and the structure between two adjacent first protruding structures 112 is the second end 114 in the second linear direction, which will not be described in detail herein. Therefore, when a human body touches the exhaust device, the exhaust device is provided with a plurality of contact points with relatively low temperature, the possibility of scalding is low, the safety and the reliability are high, and the practicability is high.

The benefit that sets up like this lies in, the heat that sets up two thermal-insulated chambeies 2 can further increase in the exhaust passage 3 carries out the isolation effect of keeping apart, avoids first casing 11 overheated to lead to the scald, and, the temperature of first end 113 is less than the temperature of second end 114 on first casing 1, can set up first end 113 in being close to human and/or naked one side, reduces the risk of scald, can promote exhaust apparatus's protective properties and experience at a certain degree and feel, and the practicality is strong.

In the above embodiment, the casing 1 located at the outermost layer is the first casing 11, and the cross-sectional shape of the first casing 11 is an oval or a waist circle.

The advantage of such an arrangement is that the structural stability of the oval or oval shape is high, and it is possible to arrange the arrangement of the exhaust devices according to the specific spatial structure, for example, when the space in the up-down direction is insufficient, the short side of the oval or oval shape is arranged in the up-down direction, and when the space in the left-right direction is insufficient, the short side of the oval or oval shape is arranged in the left-right direction.

Specifically, in some embodiments, first end 113 is located the length direction of ellipse or oval, and second end 114 is located the width direction of ellipse or oval, and at this moment, the benefit that sets up like this lies in that exhaust apparatus wholly presents for the platykurtic structure to a certain extent, even the space is not enough, can set up the one side at first end 113 place on the exhaust apparatus to being close to human one side, also can play fine scald preventing performance, and the practicality is strong.

As shown in fig. 5 and 6, in the embodiment of the present invention, the exhaust device includes at least three housings 1 and forms at least two thermal insulation chambers 2, wherein the thermal insulation chamber 2 located at the outermost layer is a first thermal insulation chamber 21, and a first through hole (not shown in the figure) adapted to communicate with the external environment is disposed on the first thermal insulation chamber 21.

Illustratively, along the extending direction of the exhaust passage 3, a plurality of first partition boards 211 are sequentially distributed at intervals inside the first heat insulation chamber 21, each first partition board 211 is provided with a second through hole 2111, the second through hole 2111 is suitable for being communicated with a first through hole, and the first through hole is located on the end face of the first heat insulation chamber 21 close to the exhaust end of the exhaust passage 3.

The benefit that sets up like this lies in, and two thermal-insulated chambeies can better keep apart the heat, further reduce the surface temperature of first casing 11 to, inside and the external environment intercommunication in first thermal-insulated chamber 21 can accelerate its heat exchange, further reduce the surface temperature of this first casing 11, and the practicality is strong.

In the above embodiments, the exhaust device is an exhaust pipe and/or a muffler of the engine.

Of course, when the exhaust device is an exhaust pipe or a muffler, the structure may be different, and fig. 1 and 2 show a case where the exhaust device is a muffler, and in this case, the exhaust device is provided with a connecting flange 4 and a waterproof cap 5 for connecting with the exhaust pipe, which may adopt the related art, and will not be described in detail herein.

The benefit that sets up like this lies in, can avoid blast pipe and/or muffler to cause the scald to the human body to a certain extent, and the reliability is high, and the practicality is strong.

In the above embodiment, the housing 1 may be made of a material having corrosion resistance, such as 306 stainless steel, and the thickness of the housing 1 is omitted in the drawings.

Another embodiment of the present invention provides an engine, including an exhaust apparatus as described above. The engine has all the advantages of the exhaust device, and the details are not described here.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims (10)

1. The exhaust device is characterized by comprising at least two shells (1) and a second partition plate (31) which are sequentially arranged from inside to outside, wherein a heat insulation cavity (2) is formed between every two adjacent shells (1), and the inner wall and/or the outer wall of at least one heat insulation cavity (2) are/is coated with a heat insulation coating respectively; the casing (1) located on the innermost layer is suitable for forming an exhaust channel (3), a plurality of second partition plates (31) are sequentially distributed in the exhaust channel (3) along the extending direction of the exhaust channel (3), and each second partition plate (31) is provided with a plurality of third through holes (311).

2. The exhaust device according to claim 1, characterized in that the insulation chamber (2) located at the innermost layer is a second insulation chamber (22), the second insulation chamber (22) is filled with an insulation material, and/or the second insulation chamber (22) is vacuum-arranged, and/or the inner wall and/or the outer wall of the second insulation chamber (22) are coated with the insulation coating, respectively.

3. The exhaust apparatus according to claim 1, wherein the third through holes (311) of two adjacent second partition plates (31) are distributed in a staggered manner.

4. The exhaust apparatus according to claim 1, wherein at least two of the second separators (31) of all the second separators (31) are sequentially bonded to form a separator group;

the third through holes (311) on all the second partition plates (31) of the partition plate group are communicated in sequence to form a plurality of spiral exhaust channels.

5. An exhaust apparatus according to claim 4, wherein all the second separators (31) of the separator group are provided with at least one fourth through hole (312) and a plurality of the third through holes (311) corresponding to the fourth through holes (312), and the plurality of the third through holes (311) are uniformly distributed along the circumferential direction of the fourth through holes (312);

the fourth through holes (312) on all the second partition plates (31) of the partition plate group are communicated in sequence to form a first exhaust channel; the plurality of spiral exhaust passages of the separator group are arranged around the first exhaust passage.

6. An exhaust device according to any one of claims 1-5, characterized in that the casing (1) at the outermost layer is a first casing (11), and the cross-sectional shape of the first casing (11) is oval or oval.

7. The exhaust device according to any one of claims 1 to 5, characterized by comprising at least three housings (1) and forming at least two heat insulation chambers (2), wherein the heat insulation chamber (2) located at the outermost layer is a first heat insulation chamber (21), the housing (1) located at the outermost layer is a first housing (11), and in a cross section of the first housing (1), the first housing (1) comprises a first end (113) located in a first linear direction and a second end (114) located in a second linear direction, a thickness of the first heat insulation chamber (21) at the first end (113) is greater than a thickness of the first heat insulation chamber (21) at the second end (114), and the first linear direction is arranged at a preset included angle with the second linear direction.

8. The exhaust device according to any of the claims 1 to 5, characterized by comprising at least three housings (1) and forming at least two insulated chambers (2), wherein the insulated chamber (2) located at the outermost layer is a first insulated chamber (21), and wherein the first insulated chamber (21) is provided with a first through hole adapted to communicate with the external environment.

9. An exhaust arrangement according to any of claims 1 to 5, wherein the exhaust arrangement is an exhaust pipe and/or a muffler of an engine.

10. An engine, characterized by comprising an exhaust apparatus according to any one of claims 1 to 9.

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