A water heater end cap assembly and a water heater

Abstract

The utility model relates to domestic appliance technical field discloses a water heater end cover assembly and water heater for. The water heater end cover assembly includes end cover and maintenance cover, and end cover includes annular inside wall surface, electric appliance chamber and appearance, and annular inside wall surface surrounds and forms the installation port of the bladder mouth for installing the bladder of water heater, and appearance is surrounded in the outer periphery of installation port, and is provided to the direction of approaching bladder, electric appliance chamber is arranged between annular inside wall surface and appearance, and the both ends of electric appliance chamber are connected annular inside wall surface and appearance respectively, maintenance cover is detachably connected in end cover and covers the maintenance opening of electric appliance chamber. The water heater end cover assembly has enough strength to support bladder and foaming pressure to guarantee the appearance quality of water heater, and can reduce the maintenance space of maintenance cover, reduces manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to an end cap assembly for a water heater and a water heater. Background Technology

[0002] A water heater is a household or commercial electrical appliance used to heat water. Its core function is to heat cold water to the temperature set by the user using electricity, gas, solar energy or other energy sources to meet people's hot water needs for bathing, kitchen washing, heating and other purposes.

[0003] Water heaters typically consist of end caps, an outer shell, and an inner tank assembly. The inner tank assembly is housed within the outer shell, and the end caps seal the end openings of the outer shell. During the manufacturing process, materials such as polyurethane are usually injected into the space between the inner tank assembly and the outer shell using high-pressure technology, forming an insulation layer with excellent heat insulation properties to reduce heat loss. However, water heaters using this technology often suffer from the following problems:

[0004] 1) The end cap is prone to deformation and whitening under foaming pressure, which affects the appearance quality of the water heater and increases safety hazards.

[0005] 2) The end of the end cap facing away from the inner tank assembly has a mounting position for components such as the power board and thermostat. The water heater also includes a maintenance cover that can cover the components on the end cap. However, in related technologies, the maintenance cover can almost cover the entire outer side of the end cap (i.e., the side of the end cap facing away from the inner tank assembly), making the maintenance cover larger in size, requiring more space for maintenance and disassembly, and increasing the material cost of the water heater to some extent.

[0006] Therefore, there is an urgent need to propose an end cap assembly for water heaters and a water heater in order to solve the above problems. Utility Model Content

[0007] The purpose of this utility model is to provide an end cap assembly for a water heater and a water heater that has sufficient strength to support the inner tank and foaming pressure, ensure the appearance quality of the water heater, and reduce the maintenance space of the maintenance cover, thereby reducing manufacturing costs.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An end cap assembly for a water heater, comprising:

[0010] The end cap includes an annular inner wall, an electrical chamber, and an outer surface. The annular inner wall forms an installation opening for installing the inner tank of a water heater. The outer surface is arranged around the outer periphery of the installation opening and protrudes towards the inner tank. The electrical chamber is disposed between the annular inner wall and the outer surface, and both ends of the electrical chamber are respectively connected to the annular inner wall and the outer surface.

[0011] A maintenance cover, detachably attached to the end cover and covering the maintenance opening of the electrical compartment.

[0012] As a preferred embodiment of the end cap assembly for water heaters provided by this utility model, the curvature of the outer surface is 0.3 to 0.5.

[0013] As a preferred embodiment of the end cap assembly for water heaters provided by this utility model, the ratio of the projected area of ​​the maintenance cover on the reference surface to the projected area of ​​the exterior surface on the reference surface is less than or equal to 50%.

[0014] The reference surface is a virtual circular surface formed with the center of the mounting port as the center and the outer diameter of the outer surface as the diameter.

[0015] As a preferred embodiment of the end cap assembly for water heater provided by this utility model, the outer side of the outer surface is provided with a through hole communicating with the electrical compartment for the power cord to be passed through, and the inner side of the outer surface is provided with a reinforcing structure corresponding to the position of the through hole.

[0016] As a preferred embodiment of the end cap assembly for water heaters provided by this utility model, a protrusion is provided on the inner side of the outer surface corresponding to the position of the wire hole, and the reinforcing structure is located on the protrusion.

[0017] As a preferred embodiment of the end cap assembly for water heaters provided by this utility model, the reinforcing structure includes a first reinforcing rib and a second reinforcing rib arranged at intersections.

[0018] As a preferred embodiment of the water heater end cap assembly provided by this utility model, the end cap is provided with a snap-fit ​​hole, and the maintenance cover is provided with a buckle, which snaps into the snap-fit ​​hole.

[0019] As a preferred embodiment of the end cover assembly for water heater provided by this utility model, the electrical compartment is further provided with a limiting groove, the maintenance cover includes a cover body and a connecting edge connected to the outer periphery of the cover body, the connecting edge is inserted into the limiting groove, and the cover body covers the maintenance opening.

[0020] As a preferred embodiment of the end cap assembly for water heater provided by this utility model, the electrical compartment is provided with a mounting groove for installing a thermostat;

[0021] And / or, the electrical room is provided with at least one cable management channel for arranging cable bundles;

[0022] And / or, the electrical compartment is provided with at least one wire clamping structure for fixing the power cord.

[0023] This utility model also provides a water heater, including a shell, an inner tank, and an end cap assembly for water heaters as described above, wherein the inner tank is housed in the shell, and the end cap assembly for water heaters is used to seal the end opening of the shell.

[0024] The beneficial effects of this utility model are as follows:

[0025] The end cap assembly for water heaters provided by this utility model features an exposed outer surface on the periphery of the electrical compartment. The maintenance cover only covers the maintenance opening of the electrical compartment, thereby significantly reducing the size of the maintenance cover and the space for maintenance and disassembly. This also reduces the manufacturing cost of the end cap assembly to some extent. Furthermore, by protruding the outer surface towards the inner tank, the structural strength of the end cap is increased, ensuring sufficient strength to support the inner tank and foaming pressure, thus guaranteeing the appearance quality of the water heater and reducing safety hazards.

[0026] The water heater provided by this utility model, by applying the above-mentioned end cap assembly for water heaters, can ensure the appearance quality of the water heater, avoid deformation and whitening of the end cap under foaming pressure, and at the same time reduce the volume of the maintenance cover and reduce the manufacturing cost of the water heater. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the water heater provided in this embodiment of the utility model;

[0029] Figure 2 This is an exploded structural diagram of the water heater provided in this embodiment of the utility model;

[0030] Figure 3 This is one of the structural schematic diagrams of the end cap provided in this embodiment of the utility model;

[0031] Figure 4 This is a cross-sectional view of the end cap provided in an embodiment of the present utility model;

[0032] Figure 5 This is the second schematic diagram of the end cap structure provided in this embodiment of the utility model;

[0033] Figure 6 yes Figure 5 A magnified view of a portion at point A;

[0034] Figure 7 This is a schematic diagram of the structure of the maintenance cover provided in an embodiment of this utility model.

[0035] Figure label:

[0036] 100. Water heater end cap assembly;

[0037] 10. End cap; 101. Mounting port; 102. Electrical compartment; 1020. Limiting groove; 1021. Mounting groove; 1022. Cable management groove; 1023. Cable clamping structure; 1024. Limiting rib; 10241. Snap-fit ​​hole; 1025. Connecting rib; 11. Annular inner wall surface; 12. Outer surface; 120. Reinforcing structure; 1201. First reinforcing rib; 1202. Second reinforcing rib; 121. Wire hole; 122. Protrusion; 13. Annular end face; 14. Annular connecting surface;

[0038] 20. Maintenance cover; 21. Cover body; 211. Buckle; 22. Connecting edge; 221. Clearance groove;

[0039] 200. Outer shell; 201. Receiving chamber;

[0040] 300. Inner liner. Detailed Implementation

[0041] Before explaining any embodiment of the present invention in detail, it should be understood that the present invention is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0042] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0043] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0044] In this invention, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0045] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0046] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0047] In this utility model, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should be understood that when one element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent the direct orientation but can also be understood as the lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0048] Figure 1 A schematic diagram of the structure of the water heater provided in this embodiment is shown. Figure 2 A schematic diagram of the exploded structure of the water heater provided in this embodiment is shown. Figures 1-2 As shown, this embodiment provides a water heater. In some embodiments, the water heater may be an electric water heater.

[0049] Specifically, the water heater provided in this embodiment includes an outer shell 200, an inner tank 300, and an end cap 10. The outer shell 200 has a receiving chamber 201, and the inner tank 300 is housed in the receiving chamber 201 of the outer shell 200. The end cap 10 has an installation port 101, which covers the end opening of the receiving chamber 201, and the inlet of the inner tank 300 is installed at the installation port 101, thereby realizing the housing, limiting, and protection of the inner tank 300.

[0050] Furthermore, the water heater also includes a maintenance cover 20. An electrical chamber 102 for installing components is provided on the side of the end cover 10 opposite to the inner tank 300. The electrical chamber 102 is arranged around the outer periphery of the mounting opening 101. The maintenance cover 20 seals the maintenance opening of the electrical chamber 102 to shield and protect the components inside the electrical chamber 102. The end cover 10 and the maintenance cover 20 together form an end cover assembly 100 for the water heater.

[0051] For ease of description, the side of the end cap 10 facing the inner liner 300 is defined as the inner side of the end cap 10, and the side of the end cap 10 away from the inner liner 300 is defined as the outer side of the end cap 10. That is to say, the electrical compartment 102 is located on the outer side of the end cap 10.

[0052] Figure 3 A schematic diagram of the end cap 10 provided in this embodiment is shown. Figure 3 and combined Figure 2As shown, the maintenance cover 20 is detachably mounted on the end cover 10 for easy disassembly by operators to inspect the components installed in the electrical compartment 102. In this embodiment, the maintenance cover 20 is provided with a buckle 211, and the end cover 10 is provided with a snap-fit ​​hole 10241. The buckle 211 engages with the snap-fit ​​hole 10241, thereby achieving a detachable connection between the maintenance cover 20 and the end cover 10. The structure is simple, easy to assemble and disassemble, and the connection is secure. Of course, in other embodiments, the buckle 211 can be provided on the end cover 10, and the snap-fit ​​hole 10241 can be provided on the maintenance cover 20, achieving the same effect. Furthermore, this embodiment does not limit the detachable connection method between the maintenance cover 20 and the end cover 10; they can also be connected by screws, plugs, or other methods.

[0053] Water heaters in related technologies typically suffer from the following problems: 1) The end caps are prone to deformation and whitening under foaming pressure, affecting the appearance quality of the water heater and increasing safety hazards. 2) The maintenance cover almost covers the entire outer side of the end cap, making the maintenance cover bulky, requiring more space for disassembly and repair, and increasing the material cost of the water heater to some extent.

[0054] To address the aforementioned issues, this embodiment also provides an end cap assembly 100 for a water heater, which has sufficient strength to support the inner tank 300 and the foaming pressure. Furthermore, the maintenance cover 20 has a small volume, reducing the space required for maintenance and disassembly, while also lowering the material cost of the water heater. The following is in conjunction with… Figures 3-7 This embodiment provides a detailed description of the specific structure of the end cap assembly 100 for a water heater.

[0055] Figure 4 One of the cross-sectional structural schematic diagrams of the end cap 10 provided in this embodiment is shown. For example... Figure 4 and combined Figure 2 , Figure 3As shown, the end cap 10 includes an annular inner wall 11, an outer surface 12, an annular end face 13, and an annular connecting surface 14. The annular inner wall 11 surrounds and forms the mounting opening 101. The outer surface 12 is arranged around the outer periphery of the mounting opening 101, and the outer surface 12 and the annular inner wall 11 are spaced apart along the axis of the mounting opening 101. The annular end face 13 is arranged around the outer periphery of the mounting opening 101 and is connected to the annular inner wall 11. The annular connecting surface 14 is located between the annular end face 13 and the outer surface 12, and both ends of the annular connecting surface 14 are connected to the annular end face 13 and the outer surface 12, respectively. The annular end face 13 and the annular connecting surface 14 surround and form the electrical compartment 102. By providing an external surface 12 on the outer periphery of the electrical compartment 102 and exposing the external surface 12, the maintenance cover 20 only covers the maintenance opening of the electrical compartment 102, thereby greatly reducing the volume of the maintenance cover 20, reducing the maintenance and disassembly space, and reducing the manufacturing cost of the end cover assembly 100 for water heaters to a certain extent.

[0056] Furthermore, the outer surface 12 protrudes towards the inner tank 300. This design increases the structural strength of the end cap 10, ensuring it has sufficient strength to support the inner tank 300 and the foaming pressure, thus guaranteeing the appearance quality of the water heater and reducing safety hazards.

[0057] Optionally, the curvature of the outer surface 12 is 0.3 to 0.5. This design allows for a smooth transition of the arc surface of the outer surface 12 while ensuring sufficient strength of the end cap 10, thus avoiding stress concentration on the outer surface 12. For example, the curvature of the outer surface 12 can be 0.30, 0.32, 0.34, 0.35, 0.36, 0.38, 0.40, 0.42, 0.44, 0.45, 0.46, 0.48, 0.50, etc. Of course, the curvature of the outer surface 12 is not limited to the above ranges, and designers can adjust the curvature of the outer surface 12 according to actual product requirements.

[0058] Optionally, the ratio of the projected area of ​​the maintenance cover 20 on the reference surface to the projected area of ​​the outer surface 12 on the reference surface is less than or equal to 50%; wherein, the reference surface is a virtual circular surface formed with the center of the mounting opening 101 as the center and the outer diameter of the outer surface 12 as the diameter. Compared with the maintenance cover in the prior art, the above design can reduce the volume of the maintenance cover 20 by more than 50%, so as to achieve the sealing effect of the electrical compartment 102 while further reducing the volume of the maintenance cover 20 and reducing the manufacturing cost of the water heater. For example, the ratio of the projected area of ​​the maintenance cover 20 on the reference surface to the projected area of ​​the outer surface 12 on the reference surface can be set to 50%, 52%, 55%, 56%, 58%, 60%, 62%, 65%, 66%, 58%, 70%, 72%, 75%, etc. Of course, this embodiment does not limit the ratio of the projected area of ​​the maintenance cover 20 on the reference surface to the projected area of ​​the appearance surface 12 on the reference surface. Designers can adjust it according to actual product requirements, but it is necessary to ensure that the maintenance cover 20 can completely cover the maintenance opening of the electrical compartment 102.

[0059] Figure 5 The second schematic diagram of the end cap 10 provided in this embodiment is shown. Figure 6 It shows Figure 5 A magnified view of a portion at point A. (See attached image.) Figures 5-6 and combined Figure 3 As shown, the outer side of the outer surface 12 is provided with a wire hole 121 that communicates with the electrical compartment 102 for the power cord to pass through. A reinforcing structure 120 is provided on the inner side of the outer surface 12 corresponding to the wire hole 121. By providing the reinforcing structure 120 on the inner side of the outer surface 12 corresponding to the wire hole 121, the surface 12 can avoid whitening under foaming stress due to insufficient strength at the location of the wire hole 121, thus ensuring the overall aesthetic appearance of the end cap 10.

[0060] Optionally, a protrusion 122 is provided on the inner side of the outer surface 12 corresponding to the position of the wire hole 121, and the reinforcing structure 120 is located on the protrusion 122. The protrusion 122 ensures that the end cap 10 has a uniform wall thickness at the position where the wire hole 121 is located, thereby avoiding stress concentration on the end cap 10. It is understood that the protrusion height of the protrusion 122 relative to the inner side of the outer surface 12 is the same as the recess depth of the wire hole 121 relative to the outer side of the outer surface 12.

[0061] like Figure 6As shown, the reinforcing structure 120 includes intersecting first reinforcing ribs 1201 and second reinforcing ribs 1202. In this embodiment, a plurality of second reinforcing ribs 1202 are arranged radially spaced along the mounting opening 101, the first reinforcing ribs 1201 extend radially along the mounting opening 101, and the extension direction of the second reinforcing ribs 1202 is perpendicular to the extension direction of the first reinforcing ribs 1201. Through the cooperation of the first reinforcing ribs 1201 and the second reinforcing ribs 1202, the load at the protrusion 122 can be effectively transmitted and dispersed in multiple directions, significantly improving the overall stiffness and load-bearing capacity of the protrusion 122 under complex working conditions, thereby suppressing local deformation.

[0062] In this embodiment, both the first reinforcing rib 1201 and the second reinforcing rib 1202 are strip-shaped ribs, which have a simple structure and are easy to process and manufacture. In other embodiments, at least one of the first reinforcing rib 1201 and the second reinforcing rib 1202 can be set as an arc-shaped rib. The arc-shaped rib can provide better rigidity and strength in the radial and circumferential directions, preventing the end cap 10 from expanding outward or collapsing inward, and the arc-shaped rib also has a more aesthetically pleasing shape.

[0063] like Figure 3 As shown, the electrical compartment 102 is provided with a mounting slot 1021 for installing a thermostat, which provides positioning and limiting for the installation of the thermostat, ensuring that the thermostat can be installed accurately, and at the same time preventing the thermostat from shifting or deviating during the use of the water heater.

[0064] Optionally, the electrical compartment 102 is provided with a wire clamping structure 1023, which is used to fix and constrain the power cord to ensure that the power cord does not loosen or shift, thus helping to maintain the stability and reliability of the electrical connection.

[0065] Optionally, a cable management channel 1022 is provided in the electrical room 102 for arranging wire harnesses to ensure the tidiness of the electrical room 102. Optionally, the number of cable management channels 1022 is at least two. This embodiment does not limit the specific number and arrangement of cable management channels 1022; designers can adjust the number and arrangement of cable management channels 1022 according to actual needs. For example, the number of cable management channels 1022 can be two, three, four, or even more.

[0066] Figure 7 A structural schematic diagram of the maintenance cover 20 provided in this embodiment is shown. (See attached diagram.) Figure 7 and combined Figure 3As shown, a limiting groove 1020 is also provided inside the electrical compartment 102. The maintenance cover 20 includes a cover body 21 and a connecting edge 22 connected to the outer periphery of the cover body 21. The connecting edge 22 is inserted into the limiting groove 1020, and the cover body 21 covers the maintenance opening of the electrical compartment 102. This arrangement not only improves the connection between the end cover 10 and the maintenance cover 20, but also improves the waterproof sealing of the end cover assembly 100 for the water heater, preventing external moisture from flowing into the electrical compartment 102 through the gap between the end cover 10 and the maintenance cover 20, thus affecting the performance of the components in the electrical compartment 102.

[0067] Specifically, a limiting rib 1024 is provided in the electrical compartment 102. The limiting rib 1024 is spaced apart from the inner wall of the electrical compartment 102, and the limiting groove 1020 is formed between them. A snap-fit ​​hole 10241 is formed on the limiting rib 1024. Optionally, at least one connecting rib 1025 connects the limiting rib 1024 and the inner wall of the electrical compartment 102. The setting of the connecting rib 1025 can improve the structural strength of the limiting rib 1024 and prevent it from shifting relative to the end cover 10 after multiple disassemblies and reassemblies. Optionally, a relief groove 221 is provided on the connecting edge 22 to avoid and accommodate the connecting rib 1025 after the maintenance cover 20 is assembled with the end cover 10.

[0068] Continue as Figure 3 and Figure 5 As shown, the end cap 10 is integrally injection molded. During injection molding, the mounting groove 1021, cable management groove 1022, cable pressing structure 1023, limiting rib 1024, and connecting rib 1025 can all be integrated onto the end cap 10. Compared with the existing technology's separate design of the electrical compartment and the end cap body, the above setting only requires the design of one injection mold, which greatly reduces manufacturing costs and improves the assembly efficiency of the production line.

[0069] In this embodiment, the end cap 10 is made of a modified composite material formed by polypropylene (PP) and 10% talc. The addition of talc significantly improves the rigidity and surface hardness of PP, making the material more robust and durable. It also enhances the stability of PP under long-term stress, reducing the risk of deformation. Furthermore, compared to the PS (polystyrene) material used in the prior art, PP + 10% talc has a lower material cost, greatly reducing the manufacturing cost of the end cap 10. Of course, in other embodiments, designers can adjust the amount of talc filling according to actual product requirements; this embodiment does not limit this. Exemplarily, the talc filling amount can also be 5%, 6%, 7%, 8%, 9%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, etc.

[0070] In other embodiments, the end cap 10 can also be made of a modified composite material formed by polypropylene (PP) and 10% glass fiber (GF). GF is an inorganic filler with high rigidity and hardness. When combined with PP, it effectively reduces the shrinkage rate of PP while improving its strength, stiffness, temperature resistance, and flame retardant properties. This ensures that the end cap 10 has sufficient strength to stably support the inner liner 300 and is less prone to deformation. Compared to the PS material used in the prior art, PP+10%GF has a lower material cost, significantly reducing the manufacturing cost of the end cap 10. Of course, in other embodiments, designers can adjust the filling amount of GF according to actual product requirements; this embodiment does not limit this. For example, the filling amount of GF can also be 5%, 6%, 7%, 8%, 9%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, etc.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. An end cap assembly for a water heater, the end cap assembly comprising: include: The end cap (10) includes an annular inner wall (11), an electrical chamber (102), and an outer surface (12). The annular inner wall (11) surrounds and forms an installation port (101) for installing the inner tank (300) of the water heater. The outer surface (12) is arranged around the outer periphery of the installation port (101) and protrudes towards the inner tank (300). The electrical chamber (102) is disposed between the annular inner wall (11) and the outer surface (12), and the two ends of the electrical chamber (102) are respectively connected to the annular inner wall (11) and the outer surface (12). A maintenance cover (20) is detachably connected to the end cover (10) and covers the maintenance opening of the electrical compartment (102).

2. The end cover assembly for a water heater of claim 1, wherein, The curvature of the outer surface (12) is 0.3 to 0.

5.

3. The end cover assembly for a water heater of claim 1, wherein, The ratio of the projected area of ​​the maintenance cover (20) on the reference surface to the projected area of ​​the exterior surface (12) on the reference surface is less than or equal to 50%. The reference surface is a virtual circular surface formed with the center of the mounting port (101) as the center and the outer diameter of the outer surface (12) as the diameter.

4. The end cover assembly for a water heater of claim 1, wherein, The outer side of the outer surface (12) is provided with a wire hole (121) that communicates with the electrical compartment (102) for the power cord to be passed through. The inner side of the outer surface (12) is provided with a reinforcing structure (120) corresponding to the position of the wire hole (121).

5. The end cover assembly for a water heater of claim 4, wherein, The inner side of the outer surface (12) is provided with a protrusion (122) corresponding to the position of the thread hole (121), and the reinforcing structure (120) is located on the protrusion (122).

6. The end cover assembly for a water heater of claim 4, wherein, The reinforcing structure (120) includes a first reinforcing rib (1201) and a second reinforcing rib (1202) that are arranged at opposite angles.

7. The end cover assembly for a water heater of claim 1, wherein, The end cap (10) is provided with a snap-fit ​​hole (10241), and the maintenance cover (20) is provided with a buckle (211), which is snapped into the snap-fit ​​hole (10241).

8. The end cover assembly for a water heater of claim 1, wherein, The electrical compartment (102) is also provided with a limiting groove (1020). The maintenance cover (20) includes a cover body (21) and a connecting edge (22) connected to the outer periphery of the cover body (21). The connecting edge (22) is inserted into the limiting groove (1020). The cover body (21) covers the maintenance opening.

9. The end cover assembly for a water heater of any one of claims 1-8, wherein, The electrical compartment (102) is provided with a mounting slot (1021) for installing a thermostat; And / or, the electrical room (102) is provided with at least one cable management channel (1022) for arranging wire harnesses; And / or, at least one wire clamping structure (1023) is provided in the electrical compartment (102) for fixing the power cord.

10. A water heater, characterized by The device includes a housing (200), an inner tank (300), and an end cap assembly for a water heater as described in any one of claims 1 to 9, wherein the inner tank (300) is housed within the housing (200), and the end cap assembly for a water heater is used to cover the end opening of the housing (200).

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