Tank and water heater

Abstract

An embodiment of the present application provides an inner tank and a water heater, wherein the inner tank includes: a first connecting plate provided with a socket; a second connecting plate disposed opposite the first connecting plate, the second connecting plate having a protrusion extending toward the first connecting plate, the protrusion being inserted into the socket so that the first connecting plate and the second connecting plate form an inner hollow tank body. Because the protrusion in the embodiment of the present application is inserted into the socket, assembly and manufacturing of the inner tank are more convenient. Furthermore, because the protrusion extends from the second connecting plate toward the first connecting plate, the portion of the protrusion located between the first and second connecting plates can serve to strengthen the inner tank.

Description

Technical Field

[0001] The present application relates to the technical field of water treatment equipment, and in particular to an inner tank and a water heater. Background Art

[0002] Due to the irrational structural design of the related art, welding the two liner bodies together is difficult, resulting in a complex welding process. Furthermore, this difficulty can lead to uneven welding at the joint between the two liner bodies, resulting in uneven or missing enamel coating at the joint, affecting the quality, safety, and reliability of the liner.

[0003] This section is intended to provide a background or context to the embodiments of the application that are recited in the claims. No statement herein is admitted to be prior art by virtue of its inclusion in this section. Summary of the Invention

[0004] The embodiments of the present application provide an inner tank and a water heater to solve or alleviate one or more technical problems in the prior art.

[0005] As one aspect of an embodiment of the present application, an embodiment of the present application provides an inner container, comprising:

[0006] A first connecting plate is provided with a socket;

[0007] The second connecting plate is arranged opposite to the first connecting plate. The second connecting plate has a protrusion extending toward the first connecting plate. The protrusion is inserted into the insertion hole so that the first connecting plate and the second connecting plate form a hollow inner body.

[0008] In one embodiment, a plurality of insertion holes are arranged at intervals on the first connecting plate, and a plurality of protrusions are arranged at intervals on the second connecting plate, and the plurality of protrusions are respectively inserted into each insertion hole; a flow channel is formed between two adjacent protrusions, and the flow channel is used to allow the liquid in the bile body to flow freely.

[0009] In one embodiment, the plurality of insertion holes and the plurality of protrusions are all arranged in a horizontal direction or in a vertical direction.

[0010] In one embodiment, a first recessed area is provided on the first connecting plate, the first recessed area extends from the outer side of the first connecting plate toward the second connecting plate, and a socket is provided in the first recessed area near the end of the second connecting plate; a second recessed area is provided on the second connecting plate, the second recessed area extends from the outer side of the second connecting plate toward the first connecting plate, and a convex portion is formed in the second recessed area near the end of the first connecting plate.

[0011] In one embodiment, the first recessed area is provided with insertion holes at intervals near the end of the second connecting plate, and a plurality of second recessed areas are provided at intervals on the second connecting plate.

[0012] In one embodiment, a support member is provided in the first recessed area and / or the second recessed area.

[0013] In one embodiment, the interior of the support is hollow and communicates with the interior of the bladder body.

[0014] In one embodiment, a first flange is provided on the outer edge of the end of the protrusion, the end of the protrusion passes through the insertion hole, and the first flange extends to the circumferential outside of the insertion hole.

[0015] In one embodiment, the first connecting plate and the second connecting plate form a cylindrical body, and the two open ends of the body are respectively provided with end covers; at least one end cover is provided with an interface, the interface extends outward away from the end cover, the outer edge of the interface is provided with a second flange, and the outside of the interface is provided with a joint, and the second flange extends to the circumferential outside of the opening of the joint.

[0016] As another aspect of the present invention, the present invention provides a water heater, comprising:

[0017] The water heater body includes a water inlet, a water outlet, a sewage outlet and a heating pipe;

[0018] The inner tank of any embodiment of the above aspects is arranged in the water heater body, the water inlet, the water outlet and the sewage outlet are connected to the tank body, and the heating tube is inserted in the tank body.

[0019] Since the protrusion of the embodiment of the present application is inserted into the insertion hole, the assembly and manufacturing of the inner liner is more convenient. In addition, since the protrusion extends from the second connecting plate to the first connecting plate, the portion of the protrusion located between the first and second connecting plates can strengthen the inner liner.

[0020] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0022] Figure 1 A three-dimensional structural diagram of an inner container according to an embodiment of the present application is shown.

[0023] Figure 2 A three-dimensional structural diagram of an inner container according to an embodiment of the present application is shown.

[0024] Figure 3 A three-dimensional structural diagram of an inner container according to an embodiment of the present application is shown.

[0025] Figure 4 An exploded structural diagram of an inner liner according to an embodiment of the present application is shown.

[0026] Figure 5 A three-dimensional structural diagram of an inner container according to an embodiment of the present application is shown.

[0027] Figure 6 An exploded structural diagram of an inner liner according to an embodiment of the present application is shown.

[0028] Figure 7 A partially enlarged view of an end cap according to an embodiment of the present application is shown.

[0029] Figure 8 A structural diagram of a water heater according to an embodiment of the present application is shown.

[0030] Description of reference numerals:

[0031] 1-first connecting plate; 2-second connecting plate; 11-jack;

[0032] 21- convex portion; 12- outer side wall of the first connecting plate; 22- inner side wall of the second connecting plate;

[0033] 23-flow channel; 3-first recessed area; 4-second recessed area;

[0034] 5-first support member; 6-second support member; 7-interface

[0035] 71-second flange; 8-connector; 91-water inlet port;

[0036] 92-water outlet port; 93-drain port; 200-water heater body;

[0037] 210-water inlet; 220-water outlet; 230-sewage outlet;

[0038] 240-heating tube; 10-end cover. DETAILED DESCRIPTION

[0039] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0040] As one aspect of the embodiment of the present application, this embodiment provides an inner liner 100, such as Figures 1 to 6As shown, the inner container may include: a first connecting plate 1 and a second connecting plate 2.

[0041] The first connecting plate 1 is provided with an insertion hole 11 on the end surface. The second connecting plate 2 is arranged opposite to the first connecting plate 1 and has a protrusion 21 extending toward the first connecting plate 1. The protrusion 21 is inserted into the insertion hole 11, so that the first connecting plate 1 and the second connecting plate 2 form a hollow body.

[0042] It should be noted that the shape, size and material of the first connecting plate 1 and the second connecting plate 2 can be selected and adjusted as needed, and are not specifically limited here. For example, the first connecting plate 1 and the second connecting plate 2 can be arc-shaped plates, curved plates or semi-elliptical concave plates. The shape of the gallbladder body surrounded by the first connecting plate 1 and the second connecting plate 2 can be selected and adjusted as needed, and are not specifically limited here. For example, the longitudinal cross-section of the gallbladder body can be rectangular, elliptical, or a "peanut" shape formed by two major arcs arranged opposite to each other (such as Figure 1 As shown), oblong (as Figure 5 as shown), polygonal or heterosexual shapes, etc.

[0043] The number, shape, size, and location of the sockets 11 on the first connecting plate 1 can be selected and adjusted based on the protrusions 21. The number, shape, size, and location of the protrusions 21 on the second connecting plate can be selected and adjusted based on the sockets 11. The number of protrusions 21 corresponds to the number of sockets 11, the shape of the protrusions 21 matches the shape of the sockets 11, and the location of the protrusions 21 corresponds to the location of the sockets 11.

[0044] The connection method between the protrusion 21 and the socket 11 can be selected and adjusted as needed. For example, the protrusion 21 can be removably inserted into the socket 11. In another example, the outer wall of the protrusion 21 is firmly connected to the inner wall of the socket 11 (e.g., screwed or welded). The end of the protrusion 21 can be located in the socket 11 or extend from the socket 11 to the outside of the gallbladder body.

[0045] The hollow bile body can be understood as meaning that the liquid contained in the bile body can flow freely in the bile body.

[0046] Because the protrusion 21 of the embodiment of the present application is inserted into the socket 11, the splicing and manufacturing of the inner liner 100 is more convenient. In addition, because the protrusion 21 extends from the second connecting plate 2 to the first connecting plate 1, the portion of the protrusion 21 located between the first connecting plate 1 and the second connecting plate 2 can strengthen the strength of the inner liner 100. At the same time, because the splicing of the inner liner 100 can be achieved by inserting the protrusion 21 into the socket 11, damage to the enamel layer coated on the inner side wall of the liner body is avoided, allowing the enamel layer to completely cover the entire inner side wall of the liner body, thereby improving the quality and safety reliability of the inner liner 100.

[0047] In one example, if Figure 4 、 Figure 6 As shown, the first connecting plate 1 has an outer wall 12 and an inner wall, and the second connecting plate 2 has an outer wall and an inner wall 22. The inner wall of the first connecting plate 1 is arranged corresponding to the inner wall 22 of the second connecting plate 2. When the first connecting plate 1 and the second connecting plate 2 form a gallbladder body, only the outer wall 12 of the first connecting plate 1 and the outer wall of the second connecting plate 2 can be seen from the outside of the gallbladder body, while the inner wall 22 of the first connecting plate 1 and the inner wall 22 of the second connecting plate 2 are located inside the gallbladder body and cannot be seen. The insertion hole 11 passes through the inner wall and the outer wall 12 of the first connecting plate 1. The protrusion 21 is located on the inner wall 22 of the second connecting plate 2 and extends toward the inner wall of the first connecting plate 1. When the protrusion 21 is inserted into the insertion hole 11, the end of the protrusion 21 can be seen from the position of the insertion hole 11 on the outer wall 12 of the first connecting plate 1, that is, the end of the protrusion 21 can extend to the outside of the gallbladder body.

[0048] In one example, the protrusion 21 may be directly formed on the inner sidewall 22 of the second connecting plate 2 , or may be formed by a recess extending from the outer sidewall of the second connecting plate 2 toward the inner sidewall.

[0049] In one embodiment, Figure 4 、 Figure 6 As shown, a plurality of insertion holes 11 are arranged at intervals on the first connecting plate 1, and a plurality of protrusions 21 are arranged at intervals on the second connecting plate 2. The plurality of protrusions 21 are respectively inserted into each insertion hole 11; a flow channel 23 is formed between two adjacent protrusions 21, and the flow channel 23 is used to allow the liquid in the bile body to flow freely.

[0050] In one embodiment, Figure 1 and Figures 3 to 6 As shown, the plurality of jacks 11 and the plurality of protrusions 21 are arranged in a horizontal direction. The plurality of jacks 11 can be arranged in one row or in multiple rows. The plurality of protrusions 21 can be arranged in one row or in multiple rows.

[0051] In one embodiment, Figure 2As shown, the plurality of jacks 11 and the plurality of protrusions 21 are all arranged in a vertical direction. The plurality of jacks 11 can be arranged in one row or in multiple rows. The plurality of protrusions 21 can be arranged in one row or in multiple rows.

[0052] In one example, a plurality of insertion holes 11 are provided at intervals along the horizontal direction in the middle of the first connecting plate 1. A plurality of protrusions 21 are provided at intervals along the horizontal direction in the middle of the second connecting plate 2.

[0053] In one example, a plurality of insertion holes 11 are provided at intervals along the vertical direction in the middle of the first connecting plate 1. A plurality of protrusions 21 are provided at intervals along the vertical direction in the middle of the second connecting plate 2.

[0054] In one embodiment, Figures 1 to 6 As shown, a first recessed area 3 is provided on the first connecting plate 1, and the first recessed area 3 extends from the outer side of the first connecting plate 1 toward the second connecting plate 2, and a socket 11 is provided at the end of the first recessed area 3 near the second connecting plate 2; a second recessed area 4 is provided on the second connecting plate 2, and the second recessed area 4 extends from the outer side of the second connecting plate 2 toward the first connecting plate 1, and a convex portion 21 is formed at the end of the second recessed area 4 near the first connecting plate 1.

[0055] The depth, shape, structure, and size of the first recessed area 3 and the second recessed area 4 can be selected and adjusted as needed.

[0056] In one example, the first recessed area 3 is formed in the middle of the first connecting plate 1. The second recessed area 4 is formed in the middle of the second connecting plate 2. The first recessed area 3 can be arranged horizontally along the first connecting plate 1 and extend toward the second connecting plate 2. The second recessed area 4 can be arranged horizontally along the second connecting plate 2 and extend toward the first connecting plate 1.

[0057] In one example, the first recessed area 3 and the first connecting plate 1 are integrally formed by a mold pressing or casting process.

[0058] In one example, the second recessed area 4 and the second connecting plate 2 are integrally formed by a mold pressing or casting process.

[0059] In one embodiment, the first recessed area 3 is provided with insertion holes 11 at intervals at the end thereof close to the second connecting plate 2 , and a plurality of second recessed areas 4 are provided at intervals on the second connecting plate 2 .

[0060] In one example, in order to improve the strength of the first recessed area 3 and / or the second recessed area 4 , a support member may be provided in the first recessed area 3 and / or the second recessed area 4 .

[0061] The shape, size, and material of the support member can be selected and adjusted as needed. For example, the support member can be a rod-shaped or cylindrical structure. The connection method of the support member to the first recessed area 3 and / or the second recessed area 4 can also be selected and adjusted as needed. For example, the support member can be welded to the first recessed area 3 and / or the second recessed area 4 or be detachably connected.

[0062] In one embodiment, Figures 3 to 6 As shown, a first support member 5 is provided in the first recessed area 3 .

[0063] In one embodiment, Figure 4 、 Figure 6 As shown, a second support member 6 is provided in the second recessed area 4 .

[0064] In one embodiment, the support is hollow and communicates with the interior of the bladder body, thereby enabling the support to connect the upper space and the lower space of the bladder body, so that water in the bladder body can flow more smoothly at various locations in the bladder body.

[0065] In one embodiment, a first flange is provided at the outer edge of the end of the protrusion 21 , the end of the protrusion 21 passes through the insertion hole 11 and the first flange extends to the circumferential outer side of the insertion hole 11 .

[0066] In this embodiment, since the first flange is provided, the protrusion 21 and the insertion hole 11 can be fixedly connected through the first flange, thereby improving the overall strength of the gallbladder body.

[0067] In one example, to further securely connect the protrusion 21 to the socket 11, a weld can be formed between the outer wall of the first flange and the inner wall of the socket 11. Because the weld is located on the outside of the bladder body, welding does not affect the enamel layer coated on the inside of the bladder body, thus solving the problem of missing or uneven enamel layer caused by welding.

[0068] In one embodiment, the first connecting plate 1 and the second connecting plate 2 form a cylindrical bladder body, and the two open ends of the bladder body are respectively provided with end caps 10. The interior space of the end caps 10 is connected to the interior space of the bladder body, so that the liquid contained in the bladder body can flow freely between the interior of the end caps 10 and the interior of the bladder body.

[0069] In one example, a reinforcing plate may be provided inside the end cover 10 to enhance the strength of the end cover.

[0070] In one example, the bladder body has a first open end and a second open end, and the end cap 10 includes the first end cap and the second end cap. An annular welding gap is formed between the first open end and the first end cap. An annular welding gap is formed between the second open end and the second end cap. Welding the annular gaps securely connects the first open end to the first end cap, and securely connects the second open end to the second end cap.

[0071] In this embodiment, since the weld is on the outside of the gallbladder body, when the annular gap is welded from the outside of the gallbladder body, it will not affect the enamel layer attached to the inside of the gallbladder body and / or the end cover 10, thereby avoiding the enamel layer attached to the inside of the gallbladder body and / or the end cover 10 from being missing or uneven.

[0072] In one example, at least one end cover is provided with an interface 7, which extends outward away from the end cover, and a second flange 71 is provided on the outer edge of the interface 7. A joint 8 is sleeved on the outside of the interface 7, and the second flange 71 extends to the circumferential outside of the opening of the joint 8.

[0073] In this embodiment, since the interface 7 is provided with the second flange 71 , the second flange 71 can be used to achieve a fixed connection with the connector 8 , thereby preventing the connector 8 from loosening and falling off.

[0074] The connector 8 is used to fix the components that need to be inserted into the tank body. The connector 8 can adopt any structure in the prior art, for example, a quick-connect connector 8 or a flange.

[0075] The number and position of the connectors 8 can be selected and adjusted as needed. For example, the connector 8 can be provided only on the top of the end cap 10, the connector 8 can be provided only on the bottom of the end cap 10, or the connector 8 can be provided on the top and bottom of the end cap 10, respectively.

[0076] The connection method between the connector 8 and the end cover 10 can be selected and adjusted as needed, as long as the connector 8 and the end cover 10 can be stably connected and easily installed. For example, the connector 8 can be connected to the end cover 10 by welding, bolts, etc.

[0077] In one example, to further securely connect the interface 7 to the connector 8, a weld may be formed between the outer wall of the second flange 71 and the inner wall of the connector 8. Since the welding process is performed on the outside of the end cap 10, the welding does not affect the enamel layer applied to the inside of the end cap 10, thus solving the problem of missing or uneven enamel layer caused by welding.

[0078] In one embodiment, the inner side walls of the first connecting plate 1 and the second connecting plate 2 are entirely coated with an enamel layer.

[0079] In one embodiment, the outer sidewall of the protrusion 21 is entirely coated with an enamel layer.

[0080] In one embodiment, the inner wall of the end cap 10 is entirely coated with an enamel layer.

[0081] In one embodiment, the bottom of the inner container 100 is provided with a water inlet port 91, a water outlet port 92, and a sewage port 93. The water inlet port 91 is used to deliver liquid into the inner container 100. The water outlet port 92 is used to discharge liquid from the inner container 100. The sewage port 93 is used to discharge stains or impurities from the inner container 100.

[0082] In one example, a hanging portion is provided on the inner liner 100 for mounting and fixing the inner liner 100 to other devices.

[0083] In one example, the inner liner 100 includes a first connecting plate 1 and a second connecting plate 2. A socket 11 is provided on the end face of the first connecting plate 1. The second connecting plate 2 is arranged opposite to the first connecting plate 1, and the second connecting plate 2 has a protrusion 21 extending toward the first connecting plate 1. The protrusion 21 is inserted into the socket 11 and welded to the socket 11, so that the first connecting plate 1 and the second connecting plate 2 form an inner hollow liner body. A first recessed area 3 is provided on the first connecting plate 1, and the first recessed area 3 extends from the outside of the first connecting plate 1 toward the second connecting plate 2, and the socket 11 is provided near the end of the first recessed area 3 near the second connecting plate 2; a second recessed area 4 is provided on the second connecting plate 2, and the second recessed area 4 extends from the outside of the second connecting plate 2 toward the first connecting plate 1, and a protrusion 21 is formed near the end of the first connecting plate 1. A support member is connected to the first recessed area 3 and / or the second recessed area 4. The first connecting plate 1 and the second connecting plate 2 form a cylindrical body, with end caps 10 provided at each of the two open ends of the body. At least one end cap 10 is provided with an interface 7, which extends outward away from the end cap 10. The outer edge of the interface 7 is provided with a second flange 71. The outer portion of the interface 7 is provided with a joint 8 welded and fixed thereto, and the second flange 71 extends to the circumferential outside of the opening of the joint 8. The inner sidewalls of the first connecting plate 1 and the second connecting plate 2 are entirely coated with enamel. The outer sidewalls of the protrusion 21 are entirely coated with enamel. The inner sidewalls of the end cap 10 are entirely coated with enamel.

[0084] The installation process of the inner liner 100 of the embodiment of the present application includes: placing the first connecting plate 1 and the second connecting plate 2 opposite each other, inserting the protrusion 21 of the second connecting plate 2 into the socket 11 of the first connecting plate 1, and welding the socket 11 and the protrusion 21 along the connection from the outside of the first connecting plate 1. End caps 10 are welded to each end of the liner body formed by the first and second connecting plates 1 and 2. Joints 8 are welded to the interface 7 of the end caps 10.

[0085] As another aspect of the embodiment of the present application, Figure 8As shown, an embodiment of the present application provides a water heater, comprising:

[0086] The water heater body 200 includes a water inlet 210 , a water outlet 220 , a sewage outlet 230 and a heating pipe 240 .

[0087] The inner tank 100 of any embodiment of the above aspects is arranged in the water heater body 200, the water inlet 210, the water outlet 220, and the sewage outlet 230 are connected to the tank body 1, and the heating pipe 240 is inserted in the tank body 1 to heat the liquid in the tank body 1.

[0088] In one example, the water inlet 210 of the water heater body 200 communicates with the water inlet port 91 of the inner tank, the water outlet 220 of the water heater body 200 communicates with the water outlet port 92 of the inner tank, and the drain port 230 of the water heater body communicates with the drain port 93 of the inner tank.

[0089] In one example, the water heater is an electric water heater in the prior art.

[0090] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0091] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0092] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connections, removable connections, or integration. They may refer to mechanical connections, electrical connections, or communication. They may refer to direct connections or indirect connections through an intermediary. They may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0093] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0094] The disclosure above provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described above. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0095] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A liner, characterized in that: include: A first connecting plate is provided with a socket; The second connecting plate is arranged opposite to the first connecting plate, and the second connecting plate has a protrusion extending toward the first connecting plate. The protrusion is inserted into the insertion hole so that the first connecting plate and the second connecting plate form an internal hollow gallbladder body, and the end of the protrusion extends from the insertion hole to the outside of the gallbladder body.

2. The inner container according to claim 1, characterized in that A plurality of the insertion holes are arranged at intervals on the first connecting plate, and a plurality of the protrusions are arranged at intervals on the second connecting plate, and the plurality of the protrusions are respectively inserted into the insertion holes; a flow channel is formed between two adjacent protrusions, and the flow channel is used to allow the liquid in the bile body to flow freely.

3. The inner container according to claim 2, characterized in that: The plurality of insertion holes and the plurality of protrusions are all arranged in a horizontal direction or in a vertical direction.

4. The inner container according to claim 1, characterized in that: A first recessed area is provided on the first connecting plate, the first recessed area extends from the outer side of the first connecting plate toward the second connecting plate, and the jack is provided at the end of the first recessed area near the second connecting plate; a second recessed area is provided on the second connecting plate, the second recessed area extends from the outer side of the second connecting plate toward the first connecting plate, and the convex portion is formed in the second recessed area near the end of the first connecting plate.

5. The inner container according to claim 4, characterized in that: The inserting holes are arranged at intervals on the end of the first recessed area close to the second connecting plate, and a plurality of the second recessed areas are arranged at intervals on the second connecting plate.

6. The inner container according to claim 4, characterized in that: A support member is provided in the first recessed area and / or the second recessed area.

7. The inner container according to claim 6, characterized in that: The interior of the support member is hollow and communicates with the interior of the bladder body.

8. The inner container according to claim 1, characterized in that: The outer edge of the end of the convex portion is provided with a first flange, the end of the convex portion passes through the insertion hole and the first flange extends to the circumferential outer side of the insertion hole.

9. The inner container according to claim 1, characterized in that: The first connecting plate and the second connecting plate form the cylindrical body, and the two open ends of the body are respectively provided with end covers; at least one of the end covers is provided with an interface, and the interface extends outward away from the end cover, and the outer edge of the interface is provided with a second flange, and the outside of the interface is provided with a joint, and the second flange extends to the circumferential outside of the opening of the joint.

10. A water heater, characterized in that: include: The water heater body includes a water inlet, a water outlet, a sewage outlet and a heating pipe; The inner tank according to any one of claims 1 to 9 is arranged in the water heater body, the water inlet, the water outlet, and the sewage outlet are connected to the tank body, and the heating pipe is inserted in the tank body.

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