Overflow-proof material structure for water heater and water heater

Abstract

The utility model discloses a kind of overflow prevention material structure for water heater and water heater, it belongs to water heater technical field, overflow prevention material structure for water heater includes material baffle ring and sealing ring, the first shape surface is formed at one end of material baffle ring to be used to and the inner wall of the shell of water heater abuts, positioning cavity is arranged in the inside of material baffle ring to be set on the pipe joint of the inner container of water heater, material baffle ring includes the elastic structure of being set on the inner wall of positioning cavity, elastic structure is used for clamping pipe joint;Sealing ring is set on the other end of material baffle ring and is used to and the inner container abuts. Water heater includes above-mentioned overflow prevention material structure for water heater. Material baffle ring and sealing ring cooperate, so that overflow prevention material structure can be clamped between shell and inner container, and with the aid of the elasticity of sealing ring, it is convenient for overflow prevention material structure to be pushed into shell with inner container, and the elastic deformation of sealing ring makes that material baffle ring and inner container are sealed well.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to an anti-overflow structure for water heaters and a water heater. Background Technology

[0002] The foam layer between the water heater's outer shell and inner tank is a crucial part of the insulation, and it is usually filled with polyurethane foam material. Since the inner tank has inlet and outlet pipe joints, and the outer shell has corresponding mounting holes at the positions of the inlet and outlet pipe joints, it is necessary to strictly control the overflow during the foaming process; otherwise, it will affect the product's appearance, assembly accuracy, and even increase subsequent cleaning costs.

[0003] There are two common types of spill prevention structures. One is a softer foam baffle, which is fitted onto the inlet and outlet pipe connectors and sandwiched between the outer shell and the inner liner. During production, the foam baffle is first fitted onto the inlet and outlet pipe connectors, using the threads of these connectors to limit its position. Then, the inner liner is pushed into the outer shell, aligning the inlet and outlet pipe connectors with the mounting holes on the outer shell. Because the foam baffle is soft and needs to contact both the inner liner and the outer shell simultaneously, it deforms during the insertion process, resulting in uneven foam layer thickness between the inner liner and the outer shell. The other type is a harder plastic sleeve structure, typically made of injection-molded plastic with some elasticity. One surface of the sleeve conforms to the inner wall of the outer shell, and the other surface conforms to the outer wall of the inner liner. During the insertion process, the conformal design of both surfaces makes it difficult to push the inner liner into the outer shell, affecting production efficiency. Utility Model Content

[0004] This utility model provides an anti-overflow structure and a water heater for water heaters, which improves production efficiency while ensuring that the anti-overflow structure is not easily deformed.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] An anti-overflow structure for a water heater, comprising:

[0007] A retaining ring, one end of which forms a first conformal surface for abutting against the inner wall of the water heater's outer shell, and a positioning cavity is provided inside the retaining ring for fitting a pipe joint on the inner tank of the water heater. The retaining ring includes an elastic structure provided on the inner wall of the positioning cavity, and the elastic structure is used to snap the pipe joint in place.

[0008] A sealing ring is fitted onto the other end of the retaining ring and is used to abut against the inner liner.

[0009] Preferably, the baffle ring includes a stepped first positioning part and a second positioning part, the diameter of the first positioning part is smaller than the diameter of the second positioning part, and the sealing ring is sleeved on the outside of the first positioning part.

[0010] Preferably, along the axial direction of the first positioning portion, the axial thickness of the sealing ring is greater than the axial width of the first positioning portion.

[0011] Preferably, the elastic structure is disposed inside the first positioning part.

[0012] Preferably, the baffle ring further includes a baffle edge, which is disposed at the end of the second positioning portion away from the first positioning portion. The baffle edge is disposed around the circumferential edge of the second positioning portion and extends outward relative to the second positioning portion. The first conformal surface is disposed on the baffle edge.

[0013] Preferably, the elastic structure includes a plurality of spring pieces, which are circumferentially spaced around the positioning cavity.

[0014] Preferably, at least two retaining rings are provided, and a sealing ring is provided for each retaining ring, and each retaining ring is integrally formed.

[0015] Preferably, the device also includes a positioning disc, which is located on the side of the retaining ring away from the sealing ring, with a portion of the positioning disc inserted into the positioning cavity, and the positioning disc is used for threaded connection with the pipe joint.

[0016] Preferably, the positioning disk is provided with a positioning cone surface in the circumferential direction, and the positioning cone surface abuts against the edge of the mounting hole on the outer shell.

[0017] A water heater includes a shell, an inner tank, a pipe connector, and an anti-overflow structure for water heaters as described above. The pipe connector is disposed in the inner tank, a retaining ring is sleeved on the pipe connector and located between the shell and the inner tank, a first conformal surface abuts against the inner wall of the shell, an elastic structure engages the pipe connector, and a sealing ring is sleeved on the retaining ring and abuts against the inner tank.

[0018] The beneficial effects of this utility model are:

[0019] The anti-overflow structure for water heaters proposed in this utility model includes a retaining ring and a sealing ring. One end of the retaining ring forms a first conformal surface for abutting against the inner wall of the water heater's outer shell. The sealing ring is fitted onto the other end of the retaining ring and abuts against the inner tank. Through the cooperation of the retaining ring and the sealing ring, the anti-overflow structure can be clamped between the outer shell and the inner tank. The elasticity of the sealing ring facilitates the anti-overflow structure being pushed into the outer shell along with the inner tank, improving production efficiency. The elastic deformation of the sealing ring ensures a good seal between the retaining ring and the inner tank. A positioning cavity is provided through the inside of the retaining ring for fitting a pipe joint on the inner tank of the water heater. The retaining ring includes an elastic structure on the inner wall of the positioning cavity, which is used to clamp the pipe joint. The clamping action of the elastic structure with the pipe joint limits the retaining ring, preventing displacement and ensuring uniform foam layer thickness. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the water heater provided in this embodiment of the utility model;

[0021] Figure 2 This is a cross-sectional view of the water heater provided in this embodiment of the utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A;

[0023] Figure 4 This is a schematic diagram of the structure of the water heater provided in this embodiment of the utility model, omitting the positioning plate;

[0024] Figure 5 This is a schematic diagram of the anti-overflow material structure for water heaters provided in this embodiment of the utility model;

[0025] Figure 6 This is an exploded view of the anti-overflow material structure for water heaters provided in this embodiment of the utility model;

[0026] Figure 7 This is a schematic diagram of the first structure of the retaining ring provided in this embodiment of the utility model;

[0027] Figure 8 This is a schematic diagram of the second structure of the retaining ring provided in this embodiment of the utility model;

[0028] Figure 9 This is a first structural schematic diagram of the positioning disk provided in this embodiment of the utility model;

[0029] Figure 10 This is a schematic diagram of the second structure of the positioning disk provided in this embodiment of the utility model.

[0030] In the picture:

[0031] 100. Outer shell; 110. Mounting hole; 200. Inner liner; 300. Pipe fitting; 310. Inlet pipe fitting; 320. Outlet pipe fitting;

[0032] 10. Material stop ring; 101. First conformal surface; 102. Positioning cavity; 11. Elastic structure; 111. Spring piece; 12. First positioning part; 13. Second positioning part; 14. Material stop edge;

[0033] 20. Sealing ring;

[0034] 30. Positioning disc; 301. Positioning cone surface; 31. Disc body; 32. Connecting part; 33. Grip part. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] See Figures 1 to 10This embodiment provides an anti-overflow structure for a water heater. The water heater includes an outer shell 100, an inner tank 200, and a pipe connector 300. The inner tank 200 is disposed inside the outer shell 100, and the pipe connector 300 is disposed on the inner tank 200. The outer shell 100 has mounting holes 110 corresponding to the positions of the pipe connector 300. Normally, the pipe connector 300 is welded to the inner tank 200, and the pipe connector 300 is threaded for easy connection to other structures.

[0040] The space between the outer shell 100 and the inner liner 200 is typically filled with polyurethane foam to form a foam layer. Polyurethane foam has a low thermal conductivity, effectively reducing heat loss and minimizing vibration and noise between the inner liner 200 and the outer shell 100, while also maintaining the stability of the inner liner 200 and preventing displacement. During the foaming process, an anti-overflow structure is required at the pipe joint 300 to prevent leakage.

[0041] The anti-overflow structure for water heaters provided in this embodiment includes a baffle ring 10 and a sealing ring 20. One end of the baffle ring 10 forms a first conformal surface 101 for abutting against the inner wall of the outer shell 100 of the water heater. A positioning cavity 102 is provided through the inside of the baffle ring 10 for fitting a pipe connector 300 on the inner tank 200 of the water heater. The baffle ring 10 includes an elastic structure 11 provided on the inner wall of the positioning cavity 102, which is used to clamp the pipe connector 300. The sealing ring 20 is fitted at the other end of the baffle ring 10 and abuts against the inner tank 200.

[0042] One end of the baffle ring 10 forms a first conformal surface 101 for abutting against the inner wall of the water heater's outer shell 100. A sealing ring 20 is fitted onto the other end of the baffle ring 10 and abuts against the inner tank 200. Through the cooperation of the baffle ring 10 and the sealing ring 20, the anti-overflow structure can be sandwiched between the outer shell 100 and the inner tank 200. Furthermore, the elasticity of the sealing ring 20 facilitates its insertion into the outer shell 100 along with the inner tank 200, improving production efficiency. The elastic deformation of the sealing ring 20 ensures a good seal between the baffle ring 10 and the inner tank 200. Only the first conformal surface 101 needs to be provided on the baffle ring 10, eliminating the need for two conformal surfaces, thus simplifying the structure and reducing processing costs.

[0043] The baffle ring 10 has a positioning cavity 102 inside for fitting the pipe connector 300 on the inner tank 200 of the water heater. The inner wall of the positioning cavity 102 is provided with an elastic structure 11, which is used to lock the pipe connector 300. The engagement between the elastic structure 11 and the pipe connector 300 limits the baffle ring 10 to prevent it from shifting and ensures that the foam layer thickness is uniform.

[0044] The retaining ring 10 can be made of hard plastic, which is not easily deformed by compression and has a certain degree of elasticity. The sealing ring 20 can be made of sponge, silicone, rubber, or other materials, and there are no restrictions on its materials.

[0045] In this embodiment, the elastic structure 11 includes a plurality of spring pieces 111, which are circumferentially spaced around the positioning cavity 102. When the retaining ring 10 is fitted onto the pipe connector 300, the spring pieces 111 are compressed by the outer wall of the pipe connector 300, causing bending deformation, which in turn causes the spring pieces 111 to generate elastic force to press the pipe connector 300. The spring pieces 111 are sheet-like structures and can be metal or plastic parts. In this embodiment, the retaining ring 10 is a one-piece molded structure, so the spring pieces 111 are made of plastic.

[0046] In other embodiments, the elastic structure 11 may include a plurality of elastic protrusions spaced circumferentially around the positioning cavity 102. When the retaining ring 10 is fitted onto the pipe connector 300, the elastic protrusions are compressed by the outer wall of the pipe connector 300, causing bending deformation and thus generating elastic force to press the pipe connector 300. The elastic protrusions may be cylindrical structures.

[0047] The pipe fitting 300 includes a threaded section and a smooth section. The end of the smooth section away from the threaded section is connected to the inner liner 200, specifically by welding. The elastic structure 11 abuts against the smooth section. Therefore, when the retaining ring 10 is fitted onto the pipe fitting 300, the elastic structure 11 passes through the threaded section to reach the smooth section and abuts against it. In this embodiment, the outer diameter of the threaded section is less than or equal to the outer diameter of the smooth section. Therefore, the threaded section does not obstruct the elastic structure 11, facilitating the smooth fitting of the retaining ring 10 onto the pipe fitting 300.

[0048] The retaining ring 10 includes a stepped first positioning part 12 and a second positioning part 13. The diameter of the first positioning part 12 is smaller than the diameter of the second positioning part 13. The sealing ring 20 is sleeved on the outside of the first positioning part 12. By setting the retaining ring 10 as a stepped structure, it is convenient to install the sealing ring 20. The sealing ring 20 is sleeved on the first positioning part 12, so that the first positioning part 12 provides support and limits the sealing ring 20 to prevent the sealing ring 20 from shifting.

[0049] During the production process, the sealing ring 20 is fitted onto the first positioning part 12, and the baffle ring 10 is fitted onto the pipe joint 300. As the inner liner 200 is pushed into the outer shell 100, the sealing ring 20 is squeezed. One end of the sealing ring 20 abuts against the second positioning part 13, and the other end of the sealing ring 20 abuts against the inner liner 200, so that the sealing ring 20 can seal the gap between the baffle ring 10 and the inner liner 200 well.

[0050] Along the axial direction of the first positioning part 12, the axial thickness of the sealing ring 20 is greater than the axial width of the first positioning part 12. When the sealing ring 20 undergoes elastic deformation, the axial thickness of the sealing ring 20 decreases. Therefore, the axial thickness of the sealing ring 20 is set to be greater than the axial width of the first positioning part 12, so that the sealing ring 20 can fully abut against the inner liner 200, ensuring good sealing performance.

[0051] The diameter of the sealing ring 20 is less than or equal to the diameter of the second positioning part 13. Even if the sealing ring 20 undergoes elastic deformation, it can still fully abut against the second positioning part 13 to ensure sealing. For example, the diameter of the second positioning part 13 is 1.5-2.5 times the diameter of the first positioning part 12, and the diameter of the sealing ring 20 is 1.2-1.6 times the diameter of the first positioning part 12.

[0052] The width of the first positioning part 12 along the axial direction is equal to the width of the second positioning part 13 along the axial direction, which facilitates processing and production and ensures structural strength.

[0053] The positioning cavity 102 penetrates the first positioning part 12 and the second positioning part 13. The positioning cavity 102 can be a stepped cavity or a cylindrical cavity. In this embodiment, the positioning cavity 102 is a stepped cavity to ensure that the wall thickness of the retaining ring 10 is uniform. The positioning cavity 102 includes a first cavity and a second cavity. The first cavity is disposed inside the first positioning part 12, and the second cavity is disposed inside the second positioning part 13. The diameter of the first cavity is smaller than the diameter of the second cavity.

[0054] In this embodiment, the elastic structure 11 is disposed inside the first positioning part 12. The first positioning part 12 has a small diameter and is directly opposite the smooth rod section, which facilitates the arrangement of the elastic structure 11. Exemplarily, along the axial direction of the first positioning part 12, the elastic structure 11 is disposed at the middle position of the first positioning part 12 to ensure structural strength.

[0055] Each spring piece 111 is fixedly connected to the first positioning part 12 at one end and is free at the other end. The width of the spring piece 111 gradually decreases from the outside to the inside along the radial direction of the first positioning part 12, so that the free end of the spring piece 111 is more likely to undergo elastic deformation.

[0056] The retaining ring 10 also includes a retaining edge 14, which is disposed at the end of the second positioning part 13 away from the first positioning part 12. The retaining edge 14 is disposed around the circumferential edge of the second positioning part 13 and extends outward relative to the second positioning part 13. A first conformal surface 101 is disposed on the retaining edge 14. By providing the retaining edge 14, the contact area between the retaining ring 10 and the outer shell 100 is increased, which facilitates the provision of the first conformal surface 101 and makes the contact between the retaining ring 10 and the outer shell 100 more stable.

[0057] The distance by which the retaining edge 14 extends outward relative to the second positioning part 13 is set according to actual needs. If the retaining edge 14 extends too short, the contact area with the outer shell 100 will be small; if the retaining edge 14 extends too long, the structural strength will be low and the retaining edge 14 will be easily deformed. Around the circumference of the second positioning part 13, the distance by which the retaining edge 14 extends outward relative to the second positioning part 13 can be uniform or non-uniform.

[0058] In some embodiments, the water heater has only one pipe connector 300, so only one retaining ring 10 is needed. In some embodiments, the water heater includes two pipe connectors 300, which can be provided with two separate retaining rings 10, or the two retaining rings 10 can be made into an integral structure. Exemplarily, at least two retaining rings 10 are provided, and a sealing ring 20 is provided for each retaining ring 10, and each retaining ring 10 is integrally formed. They can be fitted onto at least two pipe connectors 300 simultaneously, reducing the number of parts and ensuring structural strength. Specifically, the retaining edges 14 of the at least two integrally formed retaining rings 10 are connected to form a single unit.

[0059] The anti-overflow structure for the water heater also includes a positioning disc 30. The positioning disc 30 is located on the side of the retaining ring 10 away from the sealing ring 20. Part of the positioning disc 30 is inserted into the positioning cavity 102. The positioning disc 30 is used for threaded connection with the pipe connector 300. When the inner tank 200 is pushed into the outer shell 100, the pipe connector 300 is aligned with the mounting hole 110 on the outer shell 100. The positioning disc 30 is installed from the outside of the outer shell 100 to the pipe connector 300, with part of the positioning disc 30 inserted into the positioning cavity 102 to position the retaining ring 10. Specifically, the positioning disc 30 is inserted into the second cavity of the positioning cavity 102.

[0060] In this embodiment, a positioning cone surface 301 is circumferentially provided on the positioning disc 30, and the positioning cone surface 301 abuts against the edge of the mounting hole 110 on the outer shell 100. By providing the positioning cone surface 301, the center position of the pipe joint 300 and the mounting hole 110 can be automatically aligned when the positioning disc 30 is tightened. Since the retaining ring 10 is made of hard plastic, the retaining ring 10 will not shift when the positioning disc 30 is tightened, and thus the inner liner 200 will not shift relative to the outer shell 100.

[0061] Specifically, the positioning disc 30 includes a disc body 31 and a connecting portion 32 disposed on the disc body 31. The diameter of the connecting portion 32 is smaller than the diameter of the disc body 31. The connecting portion 32 is provided with a threaded hole for connecting a pipe connector 300. A positioning cone surface 301 is provided circumferentially on the disc body 31. By providing the positioning cone surface 301, at least a portion of the disc body 31 is in the form of a frustum structure. The larger diameter end of the disc body 31 is larger than the diameter of the mounting hole 110, and the smaller diameter end of the disc body 31 is smaller than the diameter of the mounting hole 110. When the positioning cone surface 301 abuts against the edge of the mounting hole 110 on the outer casing 100, at least a portion of the disc body 31 is located outside the outer casing 100 to prevent the disc body 31 from completely entering the interior of the outer casing 100, thus ensuring that it plays a positioning role.

[0062] The positioning disk 30 also includes a grip 33, which is disposed on the disk body 31 and located on the side of the disk body 31 away from the connecting part 32. The grip 33 is easy for the operator to hold, so as to facilitate the turning of the positioning disk 30. The shape of the grip 33 can be set according to actual needs, and can be cylindrical, cuboid or other shapes.

[0063] This embodiment also provides a water heater, including an outer shell 100, an inner tank 200, a pipe connector 300, and the aforementioned anti-overflow structure for water heaters. The pipe connector 300 is disposed in the inner tank 200, a retaining ring 10 is sleeved on the pipe connector 300 and located between the outer shell 100 and the inner tank 200, a first conformal surface 101 abuts against the inner wall of the outer shell 100, an elastic structure 11 clamps the pipe connector 300, and a sealing ring 20 is sleeved on the retaining ring 10 and abuts against the inner tank 200. The first conformal surface 101 at one end of the baffle ring 10 abuts against the inner wall of the outer shell 100, and the sealing ring 20 at the other end of the baffle ring 10 abuts against the outer wall of the inner liner 200. Through the cooperation of the baffle ring 10 and the sealing ring 20, the anti-overflow structure can be sandwiched between the outer shell 100 and the inner liner 200. With the help of the elasticity of the sealing ring 20, it is easy to push into the outer shell 100 along with the inner liner 200. The elastic deformation of the sealing ring 20 makes the baffle ring 10 and the inner liner 200 well sealed.

[0064] In this embodiment, two pipe connectors 300 are provided, namely an inlet pipe connector 310 and an outlet pipe connector 320. Two retaining rings 10 are also provided, with a sealing ring 20 corresponding to each retaining ring 10. The two retaining rings 10 are integrally formed. They can be simultaneously fitted onto the inlet pipe connector 310 and the outlet pipe connector 320. In some embodiments, the tubular structures in other parts of the water heater can also adopt the above-described anti-overflow structure for water heaters, as long as it can achieve the anti-overflow effect.

[0065] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An anti-overflow structure for a water heater, characterized in that, include: A retaining ring (10) is provided, one end of which forms a first conformal surface (101) for abutting against the inner wall of the outer shell (100) of the water heater. A positioning cavity (102) is provided inside the retaining ring (10) for fitting a pipe joint (300) on the inner tank (200) of the water heater. The retaining ring (10) includes an elastic structure (11) provided on the inner wall of the positioning cavity (102), and the elastic structure (11) is used to snap the pipe joint (300). A sealing ring (20) is fitted onto the other end of the retaining ring (10) and is used to abut against the inner liner (200).

2. The anti-overflow material structure for water heaters according to claim 1, characterized in that, The baffle ring (10) includes a stepped first positioning part (12) and a second positioning part (13). The diameter of the first positioning part (12) is smaller than the diameter of the second positioning part (13). The sealing ring (20) is sleeved on the outside of the first positioning part (12).

3. The anti-overflow material structure for water heaters according to claim 2, characterized in that, Along the axial direction of the first positioning part (12), the axial thickness of the sealing ring (20) is greater than the axial width of the first positioning part (12).

4. The anti-overflow material structure for water heaters according to claim 2, characterized in that, The elastic structure (11) is disposed inside the first positioning part (12).

5. The anti-overflow material structure for water heaters according to claim 2, characterized in that, The baffle ring (10) further includes a baffle edge (14), which is disposed at one end of the second positioning part (13) away from the first positioning part (12). The baffle edge (14) is disposed around the circumferential edge of the second positioning part (13) and extends outward relative to the second positioning part (13). The first conformal surface (101) is disposed on the baffle edge (14).

6. The anti-overflow material structure for water heaters according to claim 1, characterized in that, The elastic structure (11) includes a plurality of spring pieces (111), which are arranged circumferentially around the positioning cavity (102).

7. The anti-overflow material structure for water heaters according to claim 1, characterized in that, At least two baffle rings (10) are provided, and a sealing ring (20) is provided for each baffle ring (10). Each baffle ring (10) is integrally formed.

8. The anti-overflow material structure for water heaters according to any one of claims 1-7, characterized in that, It also includes a positioning disc (30), which is located on the side of the retaining ring (10) away from the sealing ring (20). Part of the positioning disc (30) is inserted into the positioning cavity (102). The positioning disc (30) is used for threaded connection with the pipe joint (300).

9. The anti-overflow material structure for water heaters according to claim 8, characterized in that, The positioning disk (30) is provided with a positioning cone surface (301) in the circumferential direction, and the positioning cone surface (301) abuts against the edge of the mounting hole (110) on the outer shell (100).

10. A water heater, characterized in that, The device includes an outer shell (100), an inner tank (200), a pipe connector (300), and an anti-overflow structure for a water heater as described in any one of claims 1-9. The pipe connector (300) is disposed in the inner tank (200), the retaining ring (10) is sleeved on the pipe connector (300) and located between the outer shell (100) and the inner tank (200), the first conformal surface (101) abuts against the inner wall of the outer shell (100), the elastic structure (11) engages with the pipe connector (300), and the sealing ring (20) is sleeved on the retaining ring (10) and abuts against the inner tank (200).

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