CN218033748U - Upper exhaust structure and water heater - Google Patents

Abstract

The utility model discloses an upper exhaust structure and water heater. This blast pipe of last exhaust structure includes location structure, is located the first pipe portion of location structure one side and the second pipe portion of opposite side, and first pipe portion passes the sealing washer setting of installing to the inner bag, and location structure can with the spacing butt of the up end of sealing washer, and the annular of setting on the shell protects a mouthful cover and establishes on the second pipe portion of blast pipe, and the dust ring cover is established between annular is protected mouthful and second pipe portion. This last exhaust structure is through utilizing annular to protect mouthful isolation shell and blast pipe to utilize the clearance between dust ring shutoff annular is protected mouthful and the blast pipe, thereby make the shell be difficult for receiving the erosion that the blast pipe released the steam, thereby avoided the appearance of shell corruption, rust phenomenon. And this last exhaust structure is through setting up location structure on the blast pipe to and through utilizing annular to protect mouthful and dust ring can realize the two-way location of blast pipe, thereby avoided the unexpected emergence that drops the phenomenon of this last exhaust structure.

Description

Upper exhaust structure and water heater

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to an upper exhaust structure and water heater.

Background

The water heater is an essential household appliance in family life, and can provide a stable hot water source, thereby facilitating the life of people. Go up the exhaust structure and set up on the water heater and be used for realizing carminative structure, along with the improvement of water heater quality, people also are higher and higher to going up the requirement of exhaust structure.

The existing upper exhaust structure has many hidden dangers in the use process, for example, the inner container of the water heater and the outer shell of the water heater are in direct contact with the exhaust pipe of the upper exhaust structure, and the contact part of the water heater is easy to rust and corrode in the long-time use process, so that the service life of the water heater is shortened, and the use experience of a user is not high. For another example, the exhaust pipe is easy to fall off the shell to the outside of the water heater or fall into the inner container due to misoperation in the processes of storage, transportation and installation.

Therefore, it is an urgent need to provide an upper exhaust structure and a water heater that can solve the above problems.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide an go up exhaust structure, the inner bag and the shell of the water heater that use with the cooperation of this last exhaust structure are difficult for corroding rust, and should go up exhaust structure's connection stability is higher, the difficult phenomenon that drops of accident.

To achieve the purpose, the utility model adopts the following technical proposal:

an upper exhaust structure, is used for communicating shell and inner bag of water heater, upper exhaust structure includes: the exhaust pipe comprises a first pipe part and a second pipe part, wherein the first pipe part is positioned on one side of the positioning structure, and the second pipe part is positioned on the other side of the positioning structure; the sealing ring is used for being mounted in a first mounting hole formed in the inner container, the first pipe part penetrates through the inner hole of the sealing ring, and the positioning structure can be in limit abutting joint with the upper end face of the sealing ring; the annular protection opening is used for being installed in a second installation hole formed in the shell, and the annular protection opening is sleeved on the second pipe part of the exhaust pipe; the dustproof ring is sleeved between the annular protection opening and the second pipe part to block a gap between the annular protection opening and the second pipe part.

Preferably, the positioning structure is a positioning convex ring integrally formed on the exhaust pipe, and the size of the positioning convex ring is larger than the diameter of an inner hole of the sealing ring.

Preferably, the positioning structure is a plurality of positioning protrusions arranged along the circumferential direction of the exhaust pipe at intervals, and the distance from the outer wall surface of each positioning protrusion to the center line of the exhaust pipe is larger than the radius of the inner hole of the sealing ring.

Preferably, the upper exhaust structure further comprises an exhaust cap, the exhaust cap is communicated with the top end of the exhaust pipe, and an exhaust hole is formed in the exhaust cap.

Preferably, the exhaust cap comprises a cap body and a connecting pipe body which are connected up and down, the connecting pipe body is detachably connected with the exhaust pipe, and the exhaust hole is formed in the connecting pipe body in a direction perpendicular to the axis of the connecting pipe body.

Preferably, a first clamping ring groove is formed in the outer wall surface of the sealing ring along the circumferential direction and used for clamping the wall plate of the inner container.

Preferably, the annular mouth guard comprises a first annular part and a second annular part which are connected in a step shape, the size of the first annular part is larger than that of the second annular part, the second annular part is arranged in the second mounting hole in a penetrating mode, and the first annular part can be limited on one side, away from the inner container, of the shell.

Preferably, a second clamping ring groove is formed in the outer wall surface of the second annular portion along the circumferential direction, and the second clamping ring groove is used for clamping the wall plate of the shell.

Preferably, the dustproof ring comprises a conical part and a columnar insertion part which are connected up and down, the large-size end of the conical part is connected with the columnar insertion part, the columnar insertion part can be inserted between the annular protective opening and the second pipe part, and the conical part is limited on one side, away from the inner container, of the annular protective opening.

A second object of the present invention is to provide a water heater, which is not easy to corrode and rust, and the upper exhaust structure of the water heater is not easy to accidentally fall off.

To achieve the purpose, the utility model adopts the following technical proposal:

a water heater comprises a shell, an inner container, a foaming layer and the upper exhaust structure, wherein the inner container is sleeved in the shell, a first mounting hole is formed in the inner container, a second mounting hole is formed in the position, corresponding to the first mounting hole, of the shell, the upper exhaust structure penetrates through the first mounting hole and the second mounting hole, a foaming space is formed between the inner wall surface of the shell, the outer wall surface of the inner container and the upper exhaust structure, and the foaming layer is filled in the foaming space.

The utility model has the advantages that:

the utility model provides an upper exhaust structure, this upper exhaust structure includes blast pipe, sealing washer, annular mouth guard and dust ring, and the blast pipe includes location structure, is located the first pipe portion of location structure one side and the second pipe portion of opposite side, and first pipe portion passes the hole setting of installing the sealing washer on the inner bag, and location structure can with the spacing butt of up end of sealing washer, set up the annular mouth guard cover on the shell and establish in the second pipe portion of blast pipe, and the dust ring cover is established between annular mouth guard and second pipe portion. This last exhaust structure is through utilizing annular to protect mouthful isolation shell and blast pipe to utilize the clearance between dust ring shutoff annular is protected mouthful and the blast pipe, thereby make the shell be difficult for receiving the erosion that the blast pipe released the steam, thereby avoided the appearance of shell corruption, rust phenomenon. And this last exhaust structure is through setting up location structure on the blast pipe, does benefit to location structure and the spacing butt of sealing washer and can be spacing this last exhaust structure outside the inner bag, and can improve the joint strength of this last exhaust structure and shell through utilizing annular to protect mouthful and dust ring to the emergence of the unexpected obscission of this last exhaust structure has been avoided.

Drawings

Fig. 1 is a schematic structural diagram of an upper exhaust structure provided in an embodiment of the present invention;

fig. 2 is a front view of an upper exhaust structure according to an embodiment of the present invention.

In the figure:

1. an exhaust pipe;

101. a positioning structure; 102. a first pipe portion; 103. a second pipe portion;

2. a seal ring;

201. a first clamping ring groove;

3. annular mouth guards;

301. a first ring portion; 302. a second ring portion; 303. a second clamping ring groove;

4. a dust ring;

5. an exhaust cap; 501. a cap body; 502. connecting the pipe body; 503. and (4) exhausting holes.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

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, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides an upward exhaust structure, and this upward exhaust structure can be used for the water heater to intercommunication water heater's inner bag and shell realize switching on of the inside and external environment of water heater, thereby make the steam in the water heater discharge smoothly, thereby avoid the inside steam of water heater to gather and cause the too big production of pressure danger. Specifically, in this embodiment, the upper vent structure is mounted on the top of the water heater. Of course, the upper exhaust structure provided by the present embodiment can be used in other devices with exhaust requirements besides the water heater, which is not listed here.

As shown in fig. 1 and 2, the upper exhaust structure includes an exhaust pipe 1, a gasket 2, an annular bead 3, and a dust seal 4. The exhaust pipe 1 is used to form an exhaust passage for the gas inside the water heater to be discharged to the outside environment. In this embodiment, the exhaust pipe 1 is cylindrical, and includes coaxial inner wall surface and outer wall surface, and the inner wall surface encloses to establish and forms above-mentioned exhaust passage, and the outer wall surface of exhaust pipe 1 is equipped with location structure 101 to the evagination, and location structure 101 is used for realizing the location of exhaust pipe 1 and inner bag, avoids the whole entering inner bag of exhaust pipe 1. Specifically, the positioning structure 101 extends along the circumferential direction of the exhaust pipe 1, and protrudes outward in the radial direction of the exhaust pipe 1. With positioning structure 101 as a boundary, exhaust pipe 1 is divided into first pipe portion 102 located on one side of positioning structure 101 and second pipe portion 103 located on the other side of positioning structure 101, and when the upper exhaust structure is mounted on the water heater, exhaust pipe 1 is mounted generally vertically, and first pipe portion 102 is located below second pipe portion 103.

Be provided with first mounting hole on the inner bag of water heater, first mounting hole runs through the wallboard of inner bag along the thickness direction of the wallboard of water heater inner bag, and in this embodiment, first mounting hole is the round hole. The sealing ring 2 is used for being installed in the first installation hole, so that the relative position of the sealing ring 2 and the inner container is fixed. After the sealing ring 2 is mounted in the first mounting hole, the first pipe part 102 of the exhaust pipe 1 penetrates through the inner hole of the sealing ring 2 to assemble the exhaust pipe 1, the sealing ring 2 and the inner container, and after the assembly is completed, the positioning structure 101 can be in limit butt joint with the upper end face of the sealing ring 2. Optionally, in this embodiment, the sealing ring 2 is an annular structure made of an elastic material, so as to reduce the difficulty of installing the sealing ring 2 into the first installation hole. Further optionally, the sealing ring 2 is a rubber ring.

The annular mouth 3 is used for separating the shell of the water heater from the exhaust pipe 1, so that the shell of the water heater is protected, and the phenomenon that the shell is corroded and rusted is avoided. Specifically, the housing is provided with a second mounting hole, the second mounting hole penetrates through the wall plate of the housing along the thickness direction of the wall plate of the housing, and in this embodiment, the second mounting hole is a circular hole. After the exhaust pipe 1 passes through the second mounting hole and the first mounting hole, the annular protection opening 3 is used for being mounted in the second mounting hole and sleeved on the second pipe part 103 of the exhaust pipe 1, so that the annular protection opening 3, the shell and the exhaust pipe 1 are relatively fixed.

The dust ring 4 is used for preventing foreign matters such as dust and rainwater from entering the water heater from the gap between the annular protective opening 3 and the exhaust pipe 1. In this embodiment, after the annular mouth 3 is installed between the inner wall surface of the second mounting hole and the exhaust pipe 1, the dust ring 4 is sleeved between the annular mouth 3 and the second pipe 103 to block the gap between the annular mouth 3 and the second pipe 103, so as to achieve the purpose of dust prevention and water prevention.

The process of assembling the upper exhaust structure on the water heater is as follows:

1. and installing the sealing ring 2 into the first installation hole of the inner container. Because the sealing ring 2 is of an annular structure made of elastic materials, the sealing ring 2 can deform and easily enter the first mounting hole to complete the assembly with the liner.

2. Exhaust pipe 1 is vertical to be set up, and with first pipe portion 102 under, second pipe portion 103 remove to the hole of sealing washer 2 at the position appearance that is last, after structure 101 to be positioned and the spacing butt of the up end of the sealing washer 2 of setting in first mounting hole, exhaust pipe 1 can't continue to move downwards again, and second pipe portion 103 of exhaust pipe 1 is located the outside of water heater shell this moment, accomplishes the preliminary location of exhaust pipe 1 and water heater so far.

3. The annular mouth protector 3 is sleeved on the second pipe part 103 of the exhaust pipe 1, and the annular mouth protector 3 is moved in the direction close to the casing until the annular mouth protector 3 enters the second mounting hole, and at the moment, the annular mouth protector 3 reaches the target position and does not move continuously.

4. The dust ring 4 is sleeved on the second pipe part 103 of the exhaust pipe 1, and the dust ring 4 is moved in the direction close to the annular protection opening 3 until the dust ring 4 enters the gap between the annular protection opening 3 and the exhaust pipe 1, so that the gap between the annular protection opening 3 and the exhaust pipe 1 is blocked, and therefore, foreign matters such as dust and rainwater are prevented from entering the water heater.

Compare in the outer shell plate material of current last exhaust structure easily take place the product life who rusts and corrode and cause and shorten, and the problem of the increase on-the-spot installation degree of difficulty that the inner bag caused is easily dropped or falls into to original formula breather pipe, the last exhaust structure that this embodiment provided is through utilizing annular bead 3 to keep apart shell and blast pipe 1, and utilize dust ring 4 shutoff annular bead 3 and the clearance between the blast pipe 1, thereby not only make the shell be difficult for receiving the erosion that the blast pipe 1 released the steam, and avoided in the foreign matter gets into the gap that exists between blast pipe 1 and the shell, thereby the shell corrosion has been avoided, the appearance of phenomenon of rustting. And this last exhaust structure is through setting up location structure 101 on blast pipe 1, does benefit to location structure 101 and 2 spacing butt of sealing washer and can be with this last exhaust structure spacing outside the inner bag, and can improve the joint strength of this last exhaust structure and shell through utilizing annular to protect mouth 3 and dust ring 4 to the emergence of the unexpected phenomenon of droing of this last exhaust structure has been avoided.

In addition, as the water heater needs to be subjected to a foaming process in the follow-up process, a foaming layer formed after foaming can be tightly combined with the structure of the upper exhaust structure arranged between the shell and the inner container, the connection strength of the upper exhaust structure, the shell and the inner container is further improved, and the phenomenon that the upper exhaust structure falls off accidentally is avoided to the maximum extent. Moreover, the dust ring 4 can tightly connect the exhaust pipe 1 and the annular mouth protector 3 to prevent rainwater and condensed water from flowing into the foaming layer.

Optionally, as shown in fig. 2, in the present embodiment, the positioning structure 101 is a positioning protruding ring integrally formed on the exhaust pipe 1, and the size of the positioning protruding ring is larger than the diameter of the inner hole of the sealing ring 2. Specifically, in the present embodiment, the exhaust pipe 1 is a stainless steel pipe, and when the stainless steel pipe is manufactured, the positioning convex ring is integrally formed on the lower half section of the stainless steel pipe by pressing. Compared with the defects that the existing flange type vent pipe has complex processing technology and needs spot welding, the material consumption is increased, a gasket is required, the coating is easily damaged by being connected with a shell screw, the corrosion speed of a shell plate is accelerated and the like, the positioning convex ring is integrally formed on the lower half section of the stainless steel pipe through the compression type in the embodiment, the process is simple, the cost is low, the structural strength of the positioning convex ring is improved, the clamping effect of the positioning convex ring on the exhaust pipe 1 can be ensured, and the positioning convex ring can be firmly fixed by the foaming layer after the inner container is foamed, so that the bidirectional clamping effect is improved, and the upper exhaust structure cannot fall into the inner container or be separated from the inner container.

Of course, in other embodiments, the positioning structure 101 may also be a plurality of positioning protrusions arranged at intervals along the circumferential direction of the exhaust pipe 1, and the distance from the outer wall surface of the positioning protrusion to the center line of the exhaust pipe 1 is greater than the radius of the inner hole of the sealing ring 2. Alternatively, the positioning protrusion may be formed integrally on the exhaust pipe 1 or may be formed separately and then connected to the exhaust pipe 1 through a connecting process. The positioning protrusions arranged at intervals are simple in structure and high in use flexibility.

Further, as shown in fig. 1, the upper exhaust structure further includes an exhaust cap 5, the exhaust cap 5 is communicated with the top end of the exhaust pipe 1, and the exhaust cap 5 is provided with an exhaust hole 503. The exhaust cap 5 can plug the top opening of the exhaust pipe 1 and change the exhaust direction, so that foreign matters are prevented from falling into the exhaust pipe 1, and potential safety hazards caused by vertical upward exhaust are eliminated.

Alternatively, as shown in fig. 2, the exhaust cap 5 includes a cap body 501 and a connecting pipe body 502 connected up and down, the connecting pipe body 502 is detachably connected to the exhaust pipe 1, and the exhaust hole 503 is opened in the connecting pipe body 502 in a direction perpendicular to the axis of the connecting pipe body 502. The exhaust cap 5 is simple in structure and easy to assemble with the exhaust pipe 1. Optionally, the connection pipe body 502 and the exhaust pipe 1 are detachably connected through a threaded connection, specifically, an internal thread structure is provided on an inner wall surface of the connection pipe body 502, an external thread structure is provided at a top of an outer wall surface of the exhaust pipe 1, and the external thread structure is in threaded connection with the internal thread structure.

In order to reduce the degree of difficulty of the assembly of the sealing ring 2 into the first mounting hole of the inner container, the outer wall surface of the sealing ring 2 is circumferentially provided with a first clamping ring groove 201, and the first clamping ring groove 201 is used for clamping the wall plate of the inner container. The arrangement of the first clamping ring groove 201 reduces the structural strength of the middle part of the sealing ring 2, and deformation is easier to occur, so that the sealing ring 2 can easily enter the first mounting hole. And, the joint of first joint annular 201 and inner bag wallboard can improve the stability of 2 equipment of sealing washer to first mounting hole, reduces the degree of difficulty that sealing washer 2 accident breaks away from first mounting hole.

Continuing to refer to fig. 2, the annular mouth 3 includes a first ring portion 301 and a second ring portion 302 connected in a stepped manner, the size of the first ring portion 301 is larger than that of the second ring portion 302, the second ring portion 302 is used for being arranged in the second mounting hole in a penetrating manner, and the size of the first ring portion 301 is larger than that of the second mounting hole, so that the first ring portion 301 can be limited on one side of the outer shell far away from the inner container and cannot pass through the second mounting hole. The annular mouth 3 and the shell which are connected in a ladder shape are easy to position and install, and the connection stability is high.

Further, a second clamping ring groove 303 is formed in the outer wall surface of the second ring portion 302 along the circumferential direction, and the second clamping ring groove 303 is used for clamping a wall plate of the shell. The arrangement of the second clamping ring groove 303 reduces the structural strength of the middle part of the second ring part 302, and the second ring part 302 is more easily deformed, so that the second ring part 302 can easily enter the second mounting hole. And, the second joint annular groove 303 can improve the stability of second ring portion 302 equipment to the second mounting hole with the joint of shell wallboard, avoids second ring portion 302 position in the second mounting hole to take place to remove.

With continued reference to fig. 1, the dust ring 4 includes a cone portion and a cylindrical plug portion connected with each other, the large-size end of the cone portion is connected with the cylindrical plug portion, the cylindrical plug portion can be inserted between the annular mouth 3 and the second tube portion 103, and the cone portion is limited on the side of the annular mouth 3 away from the inner container. This dust ring 4's dustproof effectual, and the equipment power of being convenient for.

This embodiment still provides a water heater, and this water heater includes shell, inner bag, foaming layer and foretell exhaust structure, and in the shell was located to the inner bag cover, be provided with first mounting hole on the inner bag, the position that corresponds with first mounting hole on the shell is provided with the second mounting hole, and last exhaust structure wears to establish in first mounting hole and second mounting hole, forms the foaming space between the internal face of shell, the outer wall of inner bag and the last exhaust structure, and the foaming layer is filled in the foaming space.

It should be noted that the foaming layer is formed by foaming a foaming material in the foaming space, and the foaming layer after foaming can be tightly connected with the exhaust pipe 1, the positioning structure 101 on the exhaust pipe 1, the part of the sealing ring 2 in the foaming space, and the part of the annular protection opening 3 in the foaming space, so that the upper exhaust structure is fixed, the position of the upper exhaust structure on the water heater is not changed, and the stable connection between the upper exhaust structure and the water heater is realized. By using the upper exhaust structure, the water heater not only solves the problem that the shell of the water heater is corroded and rusted, but also avoids the phenomenon that the upper exhaust structure is accidentally separated from the water heater.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides an go up exhaust structure for communicate shell and inner bag of water heater, its characterized in that, it includes to go up exhaust structure:

the exhaust pipe comprises an exhaust pipe (1), wherein a positioning structure (101) is arranged on the outer wall surface of the exhaust pipe (1) in an outward protruding mode, and the exhaust pipe (1) comprises a first pipe part (102) located on one side of the positioning structure (101) and a second pipe part (103) located on the other side of the positioning structure (101);

the sealing ring (2) is used for being mounted in a first mounting hole formed in the inner container, the first pipe part (102) penetrates through an inner hole of the sealing ring (2), and the positioning structure (101) can be in limit abutting joint with the upper end face of the sealing ring (2);

the annular protection opening (3) is used for being mounted in a second mounting hole formed in the shell, and the annular protection opening (3) is sleeved on the second pipe part (103) of the exhaust pipe (1);

dust ring (4), dust ring (4) cover is established annular mouth (3) is protected with between second pipe portion (103) to the shutoff annular mouth (3) is protected with clearance between second pipe portion (103).

2. An upper vent structure according to claim 1,

the positioning structure (101) is an integrally formed positioning convex ring on the exhaust pipe (1), and the size of the positioning convex ring is larger than the diameter of an inner hole of the sealing ring (2).

3. An upper vent structure according to claim 1,

the positioning structure (101) is a plurality of positioning protrusions arranged along the circumferential direction of the exhaust pipe (1) at intervals, and the distance from the outer wall surface of each positioning protrusion to the center line of the exhaust pipe (1) is larger than the radius of an inner hole of the sealing ring (2).

4. The upper exhaust structure according to claim 1,

go up exhaust structure still includes exhaust cap (5), exhaust cap (5) intercommunication is in the top of blast pipe (1), be provided with exhaust hole (503) on exhaust cap (5).

5. Upper exhaust structure according to claim 4,

the exhaust cap (5) comprises a cap body (501) and a connecting pipe body (502) which are connected up and down, the connecting pipe body (502) is detachably connected with the exhaust pipe (1), and the exhaust hole (503) is formed in the connecting pipe body (502) in a direction perpendicular to the axis of the connecting pipe body (502).

6. An upper vent structure according to claim 1,

first joint annular (201) have been seted up along circumference on the outer wall of sealing washer (2), first joint annular (201) are used for the joint the wallboard of inner bag.

7. The upper exhaust structure according to claim 1,

the annular mouth protector (3) comprises a first annular part (301) and a second annular part (302) which are connected in a stepped mode, the size of the first annular part (301) is larger than that of the second annular part (302), the second annular part (302) is used for penetrating into the second mounting hole, and the first annular part (301) can be limited on one side, far away from the inner container, of the shell.

8. Upper exhaust structure according to claim 7,

second joint annular groove (303) have been seted up along circumference on the outer wall surface of second ring portion (302), second joint annular groove (303) are used for the joint the wallboard of shell.

9. An upper vent structure according to claim 1,

the dustproof ring (4) comprises a conical part and a columnar inserting part which are connected up and down, the large-size end of the conical part is connected with the columnar inserting part, the columnar inserting part can be inserted between the annular protective opening (3) and the second pipe part (103), and the conical part is limited on one side, away from the inner container, of the annular protective opening (3).

10. A water heater is characterized by comprising a shell, an inner container, a foaming layer and the upper exhaust structure as claimed in any one of claims 1 to 9, wherein the inner container is sleeved in the shell, a first mounting hole is formed in the inner container, a second mounting hole is formed in the shell at a position corresponding to the first mounting hole, the upper exhaust structure penetrates through the first mounting hole and the second mounting hole, a foaming space is formed among the inner wall surface of the shell, the outer wall surface of the inner container and the upper exhaust structure, and the foaming layer is filled in the foaming space.

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