Bubble sealing structure and electric water heater

Abstract

The utility model relates to hot water supply equipment discloses a kind of sealing bubble structure and electric water heater, sealing bubble structure, comprising: inner foam and inner foam. Inner foam is equipped with bubble injection port, first avoidance mouth and second avoidance mouth, and first avoidance mouth and second avoidance mouth are located at the opposite sides of bubble injection port respectively and communicate with bubble injection port. Inner foam includes body, first connecting ear and second connecting ear, and body is used to block bubble injection port, and first connecting ear is used to block first avoidance mouth, and second connecting ear is used to block second avoidance mouth. The inner foam and bubble blocking piece of the utility model can be suitable for two kinds of double inner container structure, realize the through a set of sealing bubble structure suitable for different double inner container structure, improve the versatility of sealing bubble structure, reduce production cost.

Description

Technical Field

[0001] This utility model relates to the field of hot water supply equipment technology, and in particular to a bubble sealing structure and an electric water heater. Background Technology

[0002] A dual-tank electric water heater includes an outer shell and a dual-tank structure. The dual-tank structure is placed inside the outer shell. The two ends of the dual-tank structure are respectively insulated with plastic foam. One of the foams needs to be provided with an opening and a sealing foam. The opening serves as an inlet for injecting foaming material around the dual-tank structure. After the foaming material is injected, the opening is sealed by a foam-sealing component.

[0003] In related technologies, the two inner liner structures are generally connected by either the side walls of the two inner liners being connected by a connecting pipe, or the ends of the two inner liners being connected by a U-shaped connecting pipe. These two different connection methods result in different structures for the foam plastic and the plugging component, which in turn require different molds for manufacturing, leading to higher production costs. Utility Model Content

[0004] The first technical problem solved by this utility model is to provide a sealing bubble structure that can be applied to different double inner liner structures, thereby improving the versatility of the sealing bubble structure and reducing production costs.

[0005] The second technical problem solved by this utility model is to provide an electric water heater that allows a single sealing structure to be applied to different double-tank structures, thereby improving the versatility of the sealing structure and reducing production costs.

[0006] The first technical problem mentioned above is solved by the following technical solution: A bubble sealing structure, comprising: The inner foam is provided with a foam injection port, a first clearance port and a second clearance port, the first clearance port and the second clearance port are respectively located on opposite sides of the foam injection port and are connected to the foam injection port; The bubble-blocking component includes a body, a first connecting ear, and a second connecting ear. The body is used to block the bubble injection port, the first connecting ear is used to block the first clearance port, and the second connecting ear is used to block the second clearance port. The first connecting ear and the second connecting ear are detachably connected to the body.

[0007] Compared with the prior art, the bubble-sealing structure of this utility model has the following advantages: When the side walls of the two inner liner structures are connected by a connecting pipe, the main body is used to seal the bubble injection port, the first connecting ear is used to seal the first clearance port, and the second connecting ear is used to seal the second clearance port; when the ends of the two inner liner structures are connected by a connecting pipe, the first and second clearance ports can avoid the installation positions of the connecting pipes at the ends of the two inner liner structures, avoiding assembly interference. The first and second connecting ears can be removed, and the main body can be pressed into the bubble injection port. The inner foam and bubble-sealing component of this utility model can be applied to two types of double-inner-liner structures, realizing the application of one set of bubble-sealing structures to different double-inner-liner structures, improving the versatility of the bubble-sealing structure and reducing production costs.

[0008] In one embodiment, the bubble plug is a foam component, a first groove is provided at the connection between the first connecting ear and the body, and a second groove is provided at the connection between the second connecting ear and the body.

[0009] In one embodiment, the bubble inlet has a bubble inlet and a bubble outlet in the height direction, and the width of the bubble inlet gradually narrows from the bubble inlet to the bubble outlet, and the width of the body matches the width of the bubble inlet.

[0010] In one embodiment, the inner foam is provided with a first clearance groove for avoiding the electronic control board, and / or a second clearance groove for avoiding the thermostat.

[0011] In one embodiment, the first clearance groove and the second clearance groove are located on opposite sides of the injection port in the width direction of the inner foam.

[0012] In one embodiment, an electrical chamber is provided on the inner foam, and the foam injection port, the first clearance groove and the second clearance groove are located at the bottom of the electrical chamber; The inlet end of the bubble injection port is located on the side closer to the electrical chamber, and the outlet end of the bubble injection port is located on the side away from the electrical chamber.

[0013] In one embodiment, the inner foam is provided with a first opening for avoiding a first flange, and / or a second opening for avoiding a second flange; The first clearance opening connects the first port and the bubble injection port, and the second clearance opening connects the second port and the bubble injection port.

[0014] In one embodiment, the end of the first connecting ear near the first opening is a first arc surface adapted to the shape of the inner wall of the first opening, and the end of the second connecting ear near the second opening is a second arc surface adapted to the shape of the inner wall of the second opening.

[0015] The second technical problem mentioned above is solved by the following technical solution: An electric water heater includes the aforementioned bubble-sealing structure, and further includes: a shell and an inner tank assembly, the shell including an inner cavity and a bottom opening, the inner tank assembly being located in the inner cavity, and the bubble-sealing structure being disposed between the bottom opening and the inner tank assembly.

[0016] Compared with the prior art, the sealing structure of this utility model has the following advantages: When the side walls of the two inner liner structures are connected by a connecting pipe, the main body is used to seal the bubble injection port, the first connecting ear is used to seal the first clearance port, and the second connecting ear is used to seal the second clearance port; when the ends of the two inner liner structures are connected by a connecting pipe, the first and second clearance ports can avoid the installation positions of the connecting pipes at the ends of the two inner liner structures, avoiding assembly interference. Removing the first and second connecting ears from the main body and pressing the main body into the bubble injection port achieves a seal. The inner foam and sealing component of this utility model can be applied to two types of double inner liner structures, realizing the application of one sealing structure to different double inner liner structures, improving the versatility of the sealing structure and reducing production costs.

[0017] In one embodiment, in the height direction, the inlet end of the foam inlet is away from the inner liner assembly, the outlet end of the foam inlet is close to the inner liner assembly, and the width of the foam inlet gradually narrows from the inlet end to the outlet end. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a perspective view of a bubble sealing structure according to an embodiment of the present utility model; Figure 2 for Figure 1 A schematic diagram of another embodiment of the bubble sealer shown; Figure 3 for Figure 1 The diagram shows the structure of the first and second grooves of the sealing bubble. Figure 4 This is a schematic diagram of the structure of an electric water heater according to an embodiment of the present utility model; Figure 5 This is an exploded structural diagram of the shell and sealing bubble structure according to an embodiment of the present invention; Figure 6 This is an assembly diagram of an inner liner component and a sealing bubble structure according to an embodiment of the present utility model; Figure 7 for Figure 6 A top view of the inner liner assembly and sealing bubble structure shown in the figure; Figure 8 for Figure 6 A cross-sectional schematic diagram of the inner liner assembly and sealing bubble structure shown in the figure; Figure 9 for Figure 6 A cross-sectional view of the inner liner assembly and sealing structure shown from another angle. Figure 10 This is an assembly diagram of another inner liner component and sealing bubble structure according to an embodiment of the present utility model; Figure 11 for Figure 10 A top view of the inner liner assembly and sealing bubble structure shown in the figure; Figure 12 for Figure 10 A cross-sectional schematic diagram of the inner liner assembly and sealing bubble structure shown in the figure; Figure 13 for Figure 10 The diagram shows a cross-sectional view of the inner liner assembly and sealing structure from another angle.

[0020] Explanation of reference numerals in the attached figures: 1. Internal foam; 11. Foam inlet; 12. First clearance port; 13. Second clearance port; 14. First clearance groove; 15. Second clearance groove; 16. Electrical compartment; 17. First opening; 18. Second opening; 2. Bubble plug; 21. Body; 22. First connecting ear; 221. First groove; 222. First arc surface; 23. Second connecting ear; 231. Second groove; 232. Second arc surface; 3. Housing; 31. End cap; 32. Insulation layer; 33. Sealing cap; 34. Mounting box; 35. Mounting port; 4. Inner liner assembly; 41. First inner liner; 411. First flange; 42. Second inner liner; 421. Second flange; 431. First connecting pipe; 432. Second connecting pipe; 441. Third connecting pipe; 442. Fourth connecting pipe; 443. Connecting pipe. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] The following is combined with Figures 1 to 13 The following describes embodiments of the present invention.

[0026] like Figure 1 and Figure 2 As shown, this embodiment provides a bubble sealing structure, including: The inner foam 1 is provided with a foam injection port 11, a first clearance port 12 and a second clearance port 13. The first clearance port 12 and the second clearance port 13 are located on opposite sides of the foam injection port 11 and are connected to the foam injection port 11. The bubble-blocking component 2 includes a body 21, a first connecting ear 22, and a second connecting ear 23. The body 21 is used to block the bubble injection port 11, the first connecting ear 22 is used to block the first clearance port 12, and the second connecting ear 23 is used to block the second clearance port 13. The first connecting ear 22 and the second connecting ear 23 are detachably connected to the body 21.

[0027] When the side walls of the two inner liner structures are connected by a connecting pipe, the body 21 is used to block the bubble inlet 11, the first connecting ear 22 is used to block the first clearance port 12, and the second connecting ear 23 is used to block the second clearance port 13. When the ends of the two inner liner structures are connected by a connecting pipe, the first clearance port 12 and the second clearance port 13 can avoid the installation position of the connecting pipe at the ends of the two inner liner structures, thus avoiding assembly interference. The first connecting ear 22 and the second connecting ear 23 can be removed, and the body 21 can be pressed into the bubble inlet 11. The inner foam 1 and the bubble-blocking component 2 of this embodiment can be applied to two types of double-inner liner structures, realizing the application of one set of bubble-sealing structures to different double-inner liner structures, improving the versatility of the bubble-sealing structure and reducing production costs.

[0028] In this embodiment, the bubble sealing structure can be made of plastic foam. Both the inner foam 1 and the bubble-blocking component 2 are foam components. As the heat insulation structure of the inner tank assembly 4 of the electric water heater, the bubble sealing structure can be made using a set of molds.

[0029] In actual use, the bubble-blocking component 2 can be adjusted according to the position of the connecting pipe of the inner tank assembly 4. To facilitate the explanation of how the bubble-sealing structure is used, the following description of the bubble-sealing structure in this embodiment will be combined with the structure of the electric water heater, such as... Figure 6 As shown, in one embodiment of this example, the connecting pipe between the first inner liner 41 and the second inner liner 42 of the inner liner assembly 4 is disposed on the side wall. The complete bubble plug 2 can be used to block the bubble injection port 11. The body 21 blocks the bubble injection port 11, the first connecting ear 22 blocks the first clearance port 12, and the second connecting ear 23 blocks the second clearance port 13.

[0030] like Figure 10 As shown, in another embodiment of this invention, the connecting tube between the first inner liner 41 and the second inner liner 42 of the inner liner assembly 4 is located at the end, and the first connecting ear 22 and the second connecting ear 23 can be detached, as shown. Figure 2 As shown, only the main body 21 is retained for sealing the injection port 11, while the first clearance port 12 and the second clearance port 13 are used to avoid the connecting pipe.

[0031] To facilitate the removal of the first connecting ear 22 and the second connecting ear 23 as needed, such as Figure 3 As shown, in one embodiment, a first groove 221 is provided at the connection between the first connecting ear 22 and the body 21, and a second groove 231 is provided at the connection between the second connecting ear 23 and the body 21. In use, the first connecting ear 22 can be removed from the body 21 along the first groove 221, and the second connecting ear 23 can be removed from the body 21 along the second groove 231, leaving only the body 21. The operation is convenient and quick, and it can ensure that the side of the body 21 is a neat plane after disconnection.

[0032] like Figure 1 As shown, in one embodiment, in the height direction, the bubble inlet 11 has a bubble inlet end and a bubble outlet end. From the bubble inlet end to the bubble outlet end, the width of the bubble inlet 11 gradually narrows, and the width of the body 21 matches the width of the bubble inlet 11. Figure 1 The coordinate arrows indicate the length, width, and height directions. The inlet and outlet ends are defined by the flow direction of the injected foaming material, which flows from the inlet end to the outlet end and then enters the periphery of the inner liner assembly 4. From the inlet end to the outlet end, the width of the injection port 11 gradually narrows, making the two opposing inner walls of the injection port 11 inclined in the width direction. This guides the body 21, facilitating its smooth insertion into the injection port 11. The width of the body 21 matches the width of the injection port 11, reducing the pressure exerted by the body 21 on the injection port 11 and preventing tearing of the injection port 11.

[0033] like Figure 1 As shown, in one embodiment, the inner foam 1 is provided with a first clearance groove 14 for avoiding the control board and / or a second clearance groove 15 for avoiding the thermostat. Electric water heaters typically have a control board and a thermostat, which usually correspond to the foam injection position. This arrangement can reduce installation space and facilitate the subsequent installation of the control board and / or thermostat.

[0034] like Figure 1 As shown, in one embodiment, in the width direction of the inner foam 1, the first clearance groove 14 and the second clearance groove 15 are located on opposite sides of the foam injection port 11.

[0035] like Figure 1 As shown, in one embodiment, an electrical chamber 16 is provided on the inner foam 1, and the foam inlet 11, the first clearance groove 14, and / or the second clearance groove 15 are located at the bottom of the electrical chamber 16. The foam inlet 11 is located in the center of the electrical chamber 16. The electrical components and wiring of the electric water heater can be installed in the electrical chamber 16.

[0036] like Figure 1 As shown, in one embodiment, the inlet end of the bubble inlet 11 is located on the side close to the electrical chamber 16, and the outlet end of the bubble inlet 11 is located on the side away from the electrical chamber 16.

[0037] like Figure 1As shown, in one embodiment, the inner foam 1 is provided with a first opening 17 for avoiding the first flange 411, and / or a second opening 18 for avoiding the second flange 421. The ends of the first inner tank 41 and the second inner tank 42 of the electric water heater are provided with flanges, which are defined as the first flange 411 and the second flange 421 according to their positions. The first opening 17 corresponds to the first flange 411, and the second opening 18 corresponds to the second flange 421. The edges of the first opening 17 and the second opening 18 near the inner tank assembly 4 can respectively fit against the ends of the first inner tank 41 and the second inner tank 42.

[0038] The first clearance opening 12 connects the first inlet 17 and the bubble inlet 11, and / or the second clearance opening 13 connects the second inlet 18 and the bubble inlet 11. When the ends of the first inner tank 41 and the second inner tank 42 of the electric water heater are connected by a connecting pipe, the connecting pipe is usually arranged along the length direction. The above arrangement allows the first clearance opening 12, the bubble inlet 11 and the second clearance opening 13 to form a complete clearance space in the length direction, so as to meet the installation space requirements of the connecting pipe and avoid interference with the connecting pipe.

[0039] like Figure 1 and Figure 3 As shown, in one embodiment, the end of the first connecting ear 22 near the first opening 17 is a first arc surface 222 that is adapted to the shape of the inner wall of the first opening 17, and the end of the second connecting ear 23 near the second opening 18 is a second arc surface 232 that is adapted to the shape of the inner wall of the second opening 18.

[0040] like Figure 4 The present embodiment provides an electric water heater, including the above-mentioned bubble sealing structure, and further including: a shell 3 and an inner tank assembly 4. The shell 3 includes an inner cavity and a bottom opening, the inner tank assembly 4 is located in the inner cavity, and the bubble sealing structure is disposed between the bottom opening and the inner tank assembly 4.

[0041] During the actual installation of the electric water heater, the bubble sealing structure is located at the bottom of shell 3, so... Figure 4The opening shown is defined as the bottom opening. The inner foam 1 can be pressed into the shell 3 through the bottom opening, and the bubble-blocking component 2 can be adjusted according to the position of the connecting pipe of the double inner liner structure. When the side walls of the two inner liners of the double inner liner structure are connected by the connecting pipe, the body 21 is used to block the bubble injection port 11, the first connecting ear 22 is used to block the first clearance port 12, and the second connecting ear 23 is used to block the second clearance port 13; when the ends of the two inner liners of the double inner liner structure are connected by the connecting pipe, the first clearance port 12 and the second clearance port 13 can avoid the installation position of the connecting pipe at the ends of the two inner liners to avoid assembly interference. The first connecting ear 22 and the second connecting ear 23 are removed from the body 21, and the body 21 is pressed into the bubble injection port 11 to achieve a seal. The inner foam 1 and the bubble-blocking component 2 of this utility model can be applied to two double inner liner structures, realizing that a set of bubble-blocking structure can be used for different double inner liner structures, improving the versatility of the bubble-blocking structure and reducing production costs.

[0042] like Figure 5 As shown, Figure 5 The installation method of the electric water heater shell 3 and the bubble-blocking structure is specifically illustrated. In one embodiment, the electric water heater also includes a heat preservation structure, which includes the bubble-blocking structure and the heat preservation layer 32 in this embodiment. The inner tank assembly 4 is installed inside the shell 3, and the bubble-blocking structure and the heat preservation layer 32 are respectively located at both ends of the inner tank assembly 4. Both ends of the shell 3 are provided with openings. Following the above, the opening on the side where the bubble-blocking structure is located is defined as the bottom opening, and the opening on the other side is defined as the top opening. The electric water heater also includes an end cap 31 and a sealing cap 33. The end cap 31 is located at the bottom opening, and the sealing cap 33 is located at the top opening.

[0043] like Figure 5 As shown, in one embodiment, the electric water heater includes a mounting box 34, and the housing 3 is provided with a mounting port 35 for mounting the mounting box 34. The mounting box 34 is used to mount a control board.

[0044] like Figure 6 , Figure 7 and Figure 8 As shown, in one embodiment of this example, the inner liner assembly 4 includes a first inner liner 41 and a second inner liner 42. The sidewalls of the first inner liner 41 and the second inner liner 42 are connected by a first connecting pipe 431 and a second connecting pipe 432. The body 21 blocks the injection port 11, the first connecting ear 22 blocks the first clearance port 12, and the second connecting ear 23 blocks the second clearance port 13.

[0045] like Figure 9As shown, in the height direction, the inlet end of the foam injection port 11 faces away from the inner liner assembly 4, while the outlet end of the foam injection port 11 is close to the inner liner assembly 4. The width of the foam injection port 11 gradually narrows from the inlet end to the outlet end. During the injection of foaming material, the foaming material flows from the inlet end to the outlet end, and then enters the area around the first inner liner 41 and the second inner liner 42. From the inlet end to the outlet end, the width of the foam injection port 11 gradually narrows, making the two opposing inner walls of the foam injection port 11 inclined in the width direction. This guides the body 21, facilitating its smooth insertion into the foam injection port 11. The width of the body 21 matches the width of the foam injection port 11, reducing the pressure exerted by the body 21 on the foam injection port 11 and preventing tearing of the foam injection port 11.

[0046] like Figure 10 , Figure 11 and Figure 12 As shown, in another embodiment of this invention, the inner liner assembly 4 includes a first inner liner 41 and a second inner liner 42. A third connecting pipe 441 is provided at the end of the first inner liner 41, and a fourth connecting pipe 442 is provided at the end of the second inner liner 42. The third connecting pipe 441 and the fourth connecting pipe 442 are connected by a connecting pipe 443. The body 21 blocks the foam injection port 11, the first clearance port 12 avoids the third connecting pipe 441, and the second clearance port 13 avoids the fourth connecting pipe 442. This prevents interference between the inner foam 1 and the third connecting pipe 441 and the fourth connecting pipe 442.

[0047] like Figure 13 As shown, in the height direction, the inlet end of the bubble inlet 11 is away from the inner liner assembly 4, the outlet end of the bubble inlet 11 is close to the inner liner assembly 4, and the width of the bubble inlet 11 gradually narrows from the inlet end to the outlet end.

[0048] The electric water heater in this embodiment can use a single sealing structure to seal two different inner tank components, improving the versatility of the sealing structure and reducing production costs.

[0049] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0050] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A bubble sealing structure, characterized in that, include: The inner foam (1) is provided with a foam injection port (11), a first clearance port (12) and a second clearance port (13). The first clearance port (12) and the second clearance port (13) are located on opposite sides of the foam injection port (11) and are connected to the foam injection port (11). The bubble-blocking component (2) includes a body (21), a first connecting ear (22), and a second connecting ear (23). The body (21) is used to block the bubble injection port (11), the first connecting ear (22) is used to block the first clearance port (12), and the second connecting ear (23) is used to block the second clearance port (13). The first connecting ear (22) and the second connecting ear (23) are detachably connected to the body (21).

2. The sealing bubble structure according to claim 1, characterized in that, The bubble plug (2) is a foam component. A first groove (221) is provided at the connection between the first connecting ear (22) and the body (21), and a second groove (231) is provided at the connection between the second connecting ear (23) and the body (21).

3. The sealing bubble structure according to claim 1, characterized in that, In the height direction, the bubble inlet (11) has a bubble inlet end and a bubble outlet end. From the bubble inlet end to the bubble outlet end, the width of the bubble inlet (11) gradually narrows. The width of the body (21) matches the width of the bubble inlet (11).

4. The sealing bubble structure according to any one of claims 1-3, characterized in that, The inner foam (1) is provided with a first clearance groove (14) for avoiding the electronic control board, and / or a second clearance groove (15) for avoiding the thermostat.

5. The sealing bubble structure according to claim 4, characterized in that, In the width direction of the inner foam (1), the first clearance groove (14) and the second clearance groove (15) are located on opposite sides of the foam inlet (11).

6. The sealing bubble structure according to claim 4, characterized in that, An electrical chamber (16) is provided on the inner foam (1), and the foam injection port (11), the first clearance groove (14) and the second clearance groove (15) are located at the bottom of the electrical chamber (16); The inlet end of the bubble inlet (11) is located on the side close to the electrical chamber (16), and the outlet end of the bubble inlet (11) is located on the side away from the electrical chamber (16).

7. The bubble sealing structure according to any one of claims 1-3, characterized in that, The inner foam (1) is provided with a first port (17) for avoiding the first flange and a second port (18) for avoiding the second flange. The first clearance opening (12) connects the first through opening (17) and the bubble injection port (11), and the second clearance opening (13) connects the second through opening (18) and the bubble injection port (11).

8. The bubble sealing structure according to claim 7, characterized in that, The first connecting ear (22) has a first arc surface (222) at the end near the first opening (17) that is adapted to the shape of the inner wall of the first opening (17), and the second connecting ear (23) has a second arc surface (232) at the end near the second opening (18) that is adapted to the shape of the inner wall of the second opening (18).

9. An electric water heater, characterized in that, The sealing structure according to any one of claims 1 to 8 further includes: a shell (3) and an inner liner assembly (4), the shell (3) including an inner cavity and a bottom opening, the inner liner assembly (4) being located in the inner cavity, and the sealing structure being disposed between the bottom opening and the inner liner assembly (4).

10. The electric water heater according to claim 9, characterized in that, In the height direction, the inlet end of the bubble inlet (11) is away from the inner liner assembly (4), the outlet end of the bubble inlet (11) is close to the inner liner assembly (4), and the width of the bubble inlet (11) gradually narrows from the inlet end to the outlet end.

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