Water heater tank structure and water heater

Abstract

The present application discloses a water heater tank structure and a water heater. The water heater tank structure comprises tanks, mounting flanges, and anticorrosive layers. Each tank comprises a tank body and a bending flange arranged on the tank body; the tank body is provided with a mounting hole; and the bending flange surrounds the mounting hole and extends from the mounting hole and away from the mounting hole. Each mounting flange is arranged on a corresponding tank and surrounds a corresponding bending flange, and a gap is formed between the mounting flange and an end surface of the bending flange. Each anticorrosive layer covers the inner wall surface of a corresponding tank body, and covers from the inner wall surface of the tank body a corresponding bending flange and at least part of a corresponding mounting flange; and the anticorrosive layer is clamped into the gap. The anticorrosive layers cover at least part of the mounting flanges, the bending flanges, and the inner wall surfaces of the tank bodies, so that corrosion of the water heater tank structure can be effectively prevented; and gaps are formed between the bending flanges and the mounting flanges, and the anticorrosive layers are clamped into the gaps, so that thermal stress shrinkage of the anticorrosive layers is limited, and peeling of the anticorrosive layers is prevented, thereby effectively improving the reliability.

Description

Water heater tank structure and water heater

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 4, 2023, with application number 202323355082.5 and application name “Water Heater Tank Structure and Water Heater”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of water heaters, and in particular to a water heater inner tank structure and a water heater. Background Art

[0004] The water heater has an inner tank, which includes a mounting hole and a flange surrounding the mounting hole. The flange is used to seal the mounting hole in conjunction with other components. In order to improve the corrosion resistance of the inner tank, an anti-corrosion material is coated on the inside of the inner tank to form an anti-corrosion layer. The anti-corrosion layer extends to the flange. However, under the action of the alternating hot and cold temperatures of the water heater and the pulse action of the water valve, the anti-corrosion layer corresponding to the flange is prone to peeling off, which will reduce the corrosion resistance of the corresponding position.

[0005] Application Contents

[0006] The present application aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the present application proposes a water heater inner tank structure.

[0007] To achieve the above objectives, the present application discloses a water heater inner tank structure, which includes:

[0008] An inner liner, the inner liner comprising an inner liner body and a bent flange provided on the inner liner body, the inner liner body being provided with a mounting hole, the bent flange surrounding the mounting hole and extending from the mounting hole and away from the mounting hole;

[0009] a mounting flange, the mounting flange being provided on the inner container and surrounding the bent flange, with a gap being formed between the mounting flange and an end surface of the bent flange; and

[0010] An anti-corrosion layer covers the inner wall surface of the liner body and covers at least part of the bent flange and the mounting flange from the inner wall surface of the liner body, and the anti-corrosion layer is stuck in the gap.

[0011] In some embodiments of the present application, the mounting flange includes a first flange portion.

[0012] In some embodiments of the present application, along the axial direction of the mounting hole, the first flange portion is away from the inner tank body relative to the bent flange, so that a height difference is formed between the first flange portion and the bent flange.

[0013] In some embodiments of the present application, the anti-corrosion layer covers at least a portion of the first flange portion.

[0014] In some embodiments of the present application, along the axial direction of the mounting hole, the first flange portion is 3 mm to 8 mm higher than the bent flange.

[0015] In some embodiments of the present application, the mounting flange further includes a second flange portion and a third flange portion.

[0016] In some embodiments of the present application, the second flange portion extends from the first flange portion from one side of the bent flange to the other side of the bent flange.

[0017] In some embodiments of the present application, the gap is formed between the second flange portion and the end surface of the bent flange.

[0018] In some embodiments of the present application, the third flange portion is provided on the second flange portion and is clamped on the other side of the bent flange.

[0019] In some embodiments of the present application, the bent flange includes an abutment portion.

[0020] In some embodiments of the present application, the anti-corrosion layer includes a first region and a second region.

[0021] In some embodiments of the present application, the first area corresponds to the first flange portion, and the second area corresponds to the abutting portion.

[0022] In some embodiments of the present application, the second area is suitable for abutting the sealing ring, and along the axial direction of the mounting hole, the first area is away from the inner tank body relative to the second area, so that a height difference is formed between the first area and the second area.

[0023] In some embodiments of the present application, the abutting portion and the second region are respectively planar structures.

[0024] In some embodiments of the present application, the abutting portion and the second region are respectively perpendicular to the axial direction of the mounting hole.

[0025] In some embodiments of the present application, the mounting flange is fixed to the liner body and / or the bent flange by welding.

[0026] In some embodiments of the present application, the width of the gap is 1 mm to 2.5 mm.

[0027] The present application also discloses a water heater, which includes a mounting plate, a sealing ring and the above-mentioned water heater inner tank structure. The mounting plate is suitable for installing working parts. The mounting plate and the mounting flange are connected to press the sealing ring between the mounting plate and the bent flange.

[0028] The technical solution of the present application covers at least part of the mounting flange, the bent flange and the inner wall surface of the inner tank body with an anti-corrosion layer, which can effectively prevent the inner tank structure of the water heater from rusting. A gap is formed between the bent flange and the mounting flange, and the anti-corrosion layer is stuck in the gap, which limits the thermal stress shrinkage of the anti-corrosion layer, avoids peeling of the anti-corrosion layer, and effectively improves reliability.

[0029] Other advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other designs can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] FIG1 is a schematic diagram of a partial structure of a water heater (double-tank structure) in some embodiments;

[0032] Figure 2 is an exploded view of the structure shown in Figure 1;

[0033] FIG3 is a cross-sectional view of the structure shown in FIG1 ;

[0034] FIG4 is an enlarged view of the portion marked A in FIG3 (in order to illustrate the position of the sealing ring, the sealing ring is not in a compressed and deformed state in the figure);

[0035] FIG5 is a cross-sectional view of an inner container in some embodiments;

[0036] FIG6 is a schematic diagram of the cooperation between the inner container and the mounting flange in some embodiments;

[0037] FIG7 is an enlarged view of the portion marked B in FIG6 ;

[0038] FIG8 is a cross-sectional view of a mounting flange in some embodiments.

[0039] Explanation of the accompanying figures: Inner liner 1000, inner liner body 1100, mounting hole 1110, bent flange 1200, abutment portion 1210, end face 1220, mounting flange 2000, first flange portion 2100, second flange portion 2200, gap 2210, third flange portion 2300, anti-corrosion layer 3000, first area 3100, second area 3200, mounting plate 4100, working part 4110, sealing ring 4200.

[0040] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0045] The present application proposes a water heater inner tank structure, and the water heater inner tank structure will be described in detail below using an electric water heater as an example.

[0046] In conjunction with Figures 1, 2, 3, 4, 6 and 7, in some embodiments of the present application, the water heater inner tank structure includes an inner tank 1000, a mounting flange 2000 and an anti-corrosion layer 3000, wherein the inner tank 1000 includes an inner tank body 1100 and a bent flange 1200, the bent flange 1200 is provided on the inner tank body 1100, the inner tank body 1100 is provided with a mounting hole 1110, and the bent flange 1200 surrounds the mounting hole 1110, and the bent flange 1200 needs to be from the mounting hole 1110 toward away from the mounting hole 1110. 0, the mounting flange 2000 is arranged on the inner liner 1000 and is configured to surround the bent flange 1200, a gap 2210 is formed between the mounting flange 2000 and the end face 1220 of the bent flange 1200, the anti-corrosion layer 3000 is arranged on the inner wall surface of the inner liner body 1100 to cover the inner wall surface of the inner liner body 1100, the anti-corrosion layer 3000 also needs to cover the bent flange 1200 and at least part of the mounting flange 2000 from the inner wall surface of the inner liner body 1100, and the anti-corrosion layer 3000 is stuck in the gap 2210.

[0047] By covering at least part of the mounting flange 2000, the bent flange 1200 and the inner wall surface of the inner tank body 1100 with the anti-corrosion layer 3000, the inner tank structure of the water heater can be effectively prevented from rusting. A gap 2210 is formed between the bent flange 1200 and the mounting flange 2000, and the anti-corrosion layer 3000 is stuck in the gap 2210, which limits the thermal stress shrinkage of the anti-corrosion layer 3000, prevents the anti-corrosion layer 3000 from peeling off, and effectively improves reliability.

[0048] Specifically, the inner tank 1000 is used to store and heat a certain amount of water. When the water heater is connected to an external water source, such as municipal water, the municipal water flows into the inner tank 1000 and is stored. The water heater in the water heater heats the water in the inner tank 1000, causing the water in the inner tank 1000 to be heated and turned into hot water. When the user needs hot water, the hot water in the inner tank 1000 can be released.

[0049] The liner 1000 includes a liner body 1100 and a bent flange 1200. The bent flange 1200 surrounds a mounting hole 1110 in the liner body 1100. The mounting hole 1110 is used to allow the working component 4110 to extend into the interior of the liner 1000 (see below for details). The bent flange 1200 is used to form a seal with other components. It is understood that the liner body 1100 and the bent flange 1200 can be an integrally formed structure, or the two components can be connected by welding or other means. Of course, to prevent water seepage between the liner body 1100 and the bent flange 1200, the liner body 1100 and the bent flange 1200 generally form an integrally formed structure. For example, the mounting hole 1110 can be cut out of the liner body 1100 and the periphery of the mounting hole 1110 is bent to form the bent flange 1200. The bent flange 1200 needs to extend from the mounting hole 1110 and away from the mounting hole 1110 to a certain extent, that is, with the mounting hole 1110 as the center, the bent flange 1200 extends toward the four sides of the mounting hole 1110. This can avoid occupying the space of the mounting hole 1110 and can also cooperate with other components to achieve sealing.

[0050] In this embodiment, the installation of other components is achieved by providing a mounting flange 2000 in conjunction with the bent flange 1200. The mounting flange 2000 is provided on the inner liner 1000, that is, the mounting flange 2000 is fixed to the inner liner 1000. It is understood that the mounting flange 2000 can be fixed to the inner liner body 1100, the bent flange 1200, or both. The mounting flange 2000 is used to cooperate with other components (such as the mounting plate 4100) and lays the foundation for achieving a seal in the mounting hole 1110. Generally speaking, the mounting flange 2000 is also made of metal material, but other materials can also be used. To meet installation requirements, the mounting flange 2000 can be designed into an irregular shape.

[0051] The water heater also includes a sealing ring 4200 and a mounting plate 4100. A working part 4110 is provided on the mounting plate 4100. The so-called working part 4110 is an essential part for ensuring the normal operation of the water heater. For example, the working part 4110 includes but is not limited to a heater, a thermometer, a magnesium rod, a water inlet pipe, a water outlet pipe, a water inlet joint, a water outlet joint and / or a sewage joint. The working part 4110 is installed on the mounting plate 4100, and then the mounting plate 4100 and the working part 4110 are assembled into a module and installed in the mounting hole 1110. The sealing ring 4200 needs to be set between the mounting plate 4100 and the bent flange 1200. In this way, by connecting and fastening the mounting plate 4100 and the mounting flange 2000, the sealing ring 4200 can be compressed to form a seal.

[0052] It is understandable that in order to improve the structural strength, the material of the liner 1000 is generally selected to be a metal material. Since the liner 1000 is a water-related component, the liner 1000 is prone to corrosion when in contact with water for a long time. Therefore, in this embodiment, an anti-corrosion layer 3000 is provided, and the anti-corrosion layer 3000 covers the inner wall surface of the liner body 1100, and the anti-corrosion layer 3000 covers the bent flange 1200 and the mounting flange 200 from the inner wall surface of the liner body 1100. 0, that is, the surface of the inner tank body 1100 that contacts water and the surface of the bent flange 1200 that contacts water are both covered by the anti-corrosion layer 3000. The provision of the anti-corrosion layer 3000 can isolate the inner tank 1000 from water. When the mounting plate 4100 is installed in the mounting hole 1110, the sealing ring 4200 abuts between the mounting plate 4100 and the portion of the anti-corrosion layer 3000 corresponding to the bent flange 1200, effectively preventing rust on the inner tank 1000. This arrangement allows the water heater inner tank structure to combine the strength of metal materials with the anti-corrosion advantages of the anti-corrosion layer 3000, achieving both high pressure-bearing performance and preventing rust.

[0053] It is understandable that there are multiple options for the material of the anti-corrosion layer 3000, as long as it can isolate the inner liner 1000 from water and provide anti-corrosion for the inner liner 1000. For example, the anti-corrosion layer 3000 is made of a high molecular polymer.

[0054] When municipal water is introduced into the inner tank 1000, the temperature of this municipal water is relatively low and needs to be heated by a heater before it can be released for use by the user. When the user releases some hot water, new municipal water needs to be introduced and continued to be heated by the heater. In other words, the inner tank 1000 is in an alternating hot and cold environment, and the anti-corrosion layer 3000 is also in an alternating hot and cold environment. Generally speaking, the anti-corrosion layer 3000 is processed by a rotational molding process and bonded to the corresponding surface. In an alternating hot and cold environment, especially the part close to the bending flange 1200, it is easy to peel off relative to the bending flange 1200, which will affect the anti-corrosion sealing effect of the inner tank 1000. In addition, the pulse effect caused by the switching of the water valve during the use of the water heater will also make the anti-corrosion layer 3000 at risk of peeling. To this end, in this embodiment, the anti-corrosion layer 3000 needs to cover at least a portion of the mounting flange 2000, that is, there is a bonding force between the anti-corrosion layer 3000 and the mounting flange 2000. Since the mounting flange 2000 is farther away from the hot water than the bending flange 1200, the mounting flange 2000 is relatively weaker in the alternating hot and cold effects relative to the bending flange 1200. This can inhibit the peeling between the anti-corrosion layer 3000 and the bending flange 1200, and when the anti-corrosion layer 3000 covers at least a portion of the bending flange 1200 and the mounting flange 2000, the anti-corrosion layer 3000 is strong. The layer 3000 is also inserted into the gap 2210, thus forming a snap-fit ​​structure. For example, when the anti-corrosion layer 3000 is applied by a rotational molding process, the anti-corrosion layer 3000 can penetrate into the gap 2210 from the bent flange 1200, and can uniformly cover at least part of the mounting flange 2000 from the gap 2210. After the anti-corrosion layer 3000 is cured, a snap-fit ​​structure can be formed, thereby mechanically limiting the thermal stress shrinkage of the anti-corrosion layer 3000 at this location, further avoiding peeling between the anti-corrosion layer 3000 and the bent flange 1200, and ensuring the reliability of the anti-corrosion seal. The width W of the gap 2210 is 1 mm to 2.5 mm. This prevents the gap 2210 from being too small, resulting in the anti-corrosion layer 3000 not being able to be normally inserted into the gap 2210 when applying the anti-corrosion layer 3000 (the air in the gap 2210 cannot be discharged normally), and also prevents the gap 2210 from being too large and occupying too much space. For example, the width W of the gap 2210 is 1 mm, 1.5 mm, 2 mm or 2.5 mm.

[0055] As shown in Figures 4, 6 and 7, in some embodiments of the present application, the mounting flange 2000 has a first flange portion 2100, and the first flange portion 2100 is farther away from the inner liner body 1100 relative to the bent flange 1200 along the axial direction of the mounting hole 1110, so that a height difference is formed between the bent flange 1200 and the first flange portion 2100, and the anti-corrosion layer 3000 needs to cover at least part of the first flange portion 2100, thereby further improving the bonding strength of the anti-corrosion layer 3000.

[0056] Specifically, by designing the first flange portion 2100 to form a height difference with the bending flange 1200, the first flange portion 2100 and the bending flange 1200 cooperate to form a step-like structure. When the anti-corrosion layer 3000 is coated from the bending flange 120 and covers at least part of the first flange portion 2100 (at least part of the first flange portion 2100), after the anti-corrosion layer 3000 is cured, the anti-corrosion layer 3000 forms a corresponding structure that cooperates with the aforementioned step-like structure. Compared with the flat structure formed by the first flange portion 2100 and the bending flange 1200, the step-like structure is beneficial to further limit the thermal stress shrinkage of the anti-corrosion layer 3000, thereby further avoiding peeling of the anti-corrosion layer 3000.

[0057] In addition, as mentioned above, the mounting flange 2000 is provided for connection and installation of the mounting plate 4100 for sealing, and a height difference is designed between the first flange portion 2100 and the bent flange 1200. Then, when the mounting plate 4100 is connected to the mounting flange 2000 (for example, connected to the first flange portion 2100), sufficient space is ensured between the mounting plate 4100 and the bent flange 1200 to accommodate the sealing ring 4200.

[0058] Through extensive testing, the first flange 2100 is 3mm to 8mm higher than the bent flange 1200 along the axial direction of the mounting hole 1110. This not only forms a step-like structure between the first flange 2100 and the bent flange 1200, but also avoids excessive distance between them and resulting in excessive external space occupation. For example, the first flange 2100 is 3mm, 4mm, 6mm, or 8mm higher than the bent flange 1200 along the axial direction of the mounting hole 1110, which satisfies most product types. It is understood that the height difference here is measured with the first flange 2100 and the bent flange 1200 along the axial direction of the mounting hole 1110. In conjunction with Figures 3 and 7, with the orientation shown in Figure 3 as a reference, the axial direction of the mounting hole 1110 is the left-right direction, and the height difference between the right side of the bent flange 1200 and the right side of the first flange 2100 is H, which is 3mm to 8mm.

[0059] As shown in Figures 4, 6, 7 and 8, in some embodiments of the present application, the mounting flange 2000 also has a second flange portion 2200 and a third flange portion 2300. The second flange portion 2200 is arranged between the first flange portion 2100 and the third flange portion 2300. The entire mounting flange 2000 constitutes an annular structure, the first flange portion 2100 is located in the outer ring part of the annular structure, and the third flange portion 2300 is located in the inner ring part of the annular structure. The mounting flange 2000 and the inner liner 1000 can be assembled in the following manner: the mounting flange 2000 is an integrally formed part, for example, formed by integral stamping and punching, a flange surrounding the mounting hole 1110 is provided on the inner liner 1000, and then the mounting flange 2000 is put onto the flange. At this time, the third flange portion 2300 is close to (close to) the flange relative to the first flange portion 2100, and then the flange is bent to form a bent flange 1200. Due to the height difference between the first flange portion 2100 and the bent flange 1200, the second flange portion 2200 can be extended from one side of the bent flange 1200 to the other side of the bent flange 1200. For example, in the orientation shown in Figure 7, the first flange portion 2100 is located on the right side of the bending flange 1200, the third flange portion 2300 is located on the left side of the bending flange 1200, and the second flange portion 2200 extends from the right side of the bending flange 1200 to the left side of the bending flange 1200 from the first flange portion 2100, and forms a gap 2210 between the second flange portion 2200 and the end face 1220 of the bending flange 1200. The structure of the bending flange 1200 realizes the clamping of the third flange portion 2300, so that the preliminary installation of the mounting flange 2000 can be formed.

[0060] Of course, the mounting flange 2000 can also be assembled to the inner liner 1000 in other ways. For example, the mounting flange 2000 is a split structure, and the bending flange 1200 is first processed, and then the mounting flange 2000 is assembled to the inner liner 1000.

[0061] It is understood that after the mounting flange 2000 is assembled to the inner liner 1000, in addition to securing the mounting flange 2000 by means of the third flange portion 2300, the mounting flange 2000 may also be secured by welding. For example, the mounting flange 2000 may be welded to the bent flange 1200, or the mounting flange 2000 may be welded to the inner liner body 1100, or the mounting flange 2000 may be welded to both the bent flange 1200 and the inner liner body 1100. This improves the mounting stability of the mounting flange 2000 and better supports the installation of the mounting plate 4100. Since the bent flange 1200 alone may not be sufficient to support the installation of the mounting flange 2000, and the weight will be fully applied to the bent flange 1200, which may cause deformation of the bent flange 1200, welding the mounting flange 2000 to both the bent flange 1200 and the inner liner body 1100 can effectively achieve the installation of the mounting flange 2000.

[0062] As mentioned above, it is necessary to set the anti-corrosion layer 3000 to achieve anti-corrosion sealing. Therefore, after the mounting plate 4100 is installed, the sealing ring 4200 actually abuts between the anti-corrosion layer 3000 and the mounting plate 4100. Specifically, as shown in Figures 4 to 8, the bent flange 1200 has an abutting portion 1210, and the anti-corrosion layer 3000 has a first area 3100 and a second area 3200. The first flange portion 2100 corresponds to the first area 3100, and the abutting portion 1210 corresponds to the second area. The second area 3200 and the mounting plate 4100 correspond to each other, and the so-called corresponding means that they are stacked together. When the mounting plate 4100 is installed on the inner tank 1000, the mounting plate 4100 is fastened to the mounting flange 2000, and the sealing ring 4200 is arranged between the second area 3200 and the mounting plate 4100. Since the second area 3200 corresponds to the abutting portion 1210, the abutting portion 1210 and the mounting plate 4100 jointly clamp the sealing ring 4200 during the fastening process of the mounting plate 4100, thereby forming a seal. Moreover, in the present embodiment, the first area 3100 is farther away from the inner tank body 1100 relative to the second area 3200 along the axial direction of the mounting hole 1110, so that a height difference is formed between the first area 3100 and the second area 3200, that is, a step-like structure is formed between the first area 3100 and the second area 3200. When the sealing ring 4200 is squeezed, the sealing ring 4200 is deformed, and the sealing ring 4200 gradually fills the space between the second area 3200 and the mounting plate 4100. The step-like structure formed by the first area 3100 and the second area 3200 can prevent the sealing ring 4200 from being excessively deformed. It contacts the first area 3100 of the anti-corrosion layer 3000, thereby preventing the sealing ring 4200 from contacting the joint surface between the anti-corrosion layer 3000 and the mounting flange 2000 (the joint surface between the first area 3100 and the first flange part 2100), that is, the sealing ring 4200 is away from the edge of the anti-corrosion layer 3000, thereby preventing the water in the inner tank 1000 from seeping through the sealing ring 4200 and the first area 3100 under the action of water pressure and seeping through the edge of the anti-corrosion layer 3000 into the joint surface between the anti-corrosion layer 3000 and the metal (mounting flange 2000, bent flange 1200, inner tank body 1100), further preventing the anti-corrosion layer 3000 from peeling off.

[0063] As shown in Figures 4 and 5, in some embodiments of the present application, the abutment 1210 is a planar structure, and the second area 3200 is also a planar structure. During the assembly of the mounting plate 4100, the mounting plate 4100 and the abutment 1210 jointly clamp the sealing ring 4200, and the sealing ring 4200 is deformed and filled between the second area 3200 and the mounting plate 4100. The sealing ring 4200 also exerts a force on the second area 3200. Since the abutment 1210 and the second area 3200 are respectively planar structures, the reaction force applied to the second area 3200 is perpendicular to the abutment 1210 and will not generate a component force, thereby tightly pressing the second area 3200 to the abutment 1210, further reducing the risk of peeling of the anti-corrosion layer 3000.

[0064] Furthermore, in combination with Figures 4 and 5, in some embodiments of the present application, the abutment portion 1210 is designed to be perpendicular to the axial direction of the mounting hole 1110, and the second area 3200 is also perpendicular to the axial direction of the mounting hole 1110. Through such a setting, in the process of connecting the mounting plate 4100, the mounting plate 4100 moves roughly along the axial direction of the mounting hole 1110 toward the bent flange 1200, thereby gradually generating a pressure perpendicular to the abutment portion 1210 and pressing the sealing ring 4200 to avoid abnormal deformation of the sealing ring 4200.

[0065] The second aspect of the present application discloses a water heater, which includes a sealing ring 4200, a mounting plate 4100 and the above-mentioned water heater inner tank structure. The working component 4110 is arranged on the mounting plate 4100 to form a module. The mounting plate 4100 is connected to the mounting flange 2000 of the water heater inner tank structure, so that the sealing ring 4200 is clamped between the bent flange 1200 and the mounting plate 4100 to form a seal.

[0066] The inner tank structure of the water heater includes an inner tank 1000, a mounting flange 2000 and an anti-corrosion layer 3000, wherein the inner tank 1000 includes an inner tank body 1100 and a bent flange 1200, the bent flange 1200 is arranged on the inner tank body 1100, the inner tank body 1100 is provided with a mounting hole 1110, and the bent flange 1200 surrounds the mounting hole 1110, and the bent flange 1200 needs to extend from the mounting hole 1110 toward the direction away from the mounting hole 1110. 0 is arranged on the inner liner 1000 and is configured to surround the bent flange 1200. A gap 2210 is formed between the mounting flange 2000 and the end face 1220 of the bent flange 1200. The anti-corrosion layer 3000 is arranged on the inner wall surface of the inner liner body 1100 to cover the inner wall surface of the inner liner body 1100. The anti-corrosion layer 3000 also needs to cover the bent flange 1200 and at least part of the mounting flange 2000 from the inner wall surface of the inner liner body 1100, and the anti-corrosion layer 3000 is stuck in the gap 2210.

[0067] By covering at least part of the mounting flange 2000, the bent flange 1200 and the inner wall surface of the inner tank body 1100 with the anti-corrosion layer 3000, the inner tank structure of the water heater can be effectively prevented from rusting. A gap 2210 is formed between the bent flange 1200 and the mounting flange 2000, and the anti-corrosion layer 3000 is stuck in the gap 2210, which limits the thermal stress shrinkage of the anti-corrosion layer 3000, prevents the anti-corrosion layer 3000 from peeling off, and effectively improves reliability.

[0068] It can be understood that the water heater includes the water heater inner tank structure of the above embodiment, and the water heater inner tank structure adopts the technical solution of the above embodiment, so it at least has the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

[0069] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made based on the contents of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A water heater tank structure, wherein: include: The liner comprises an liner body and a bent flange provided on the liner body, the liner body is provided with a mounting hole, the bent flange surrounds the mounting hole and extends from the mounting hole and away from the mounting hole; A mounting flange, the mounting flange being disposed on the inner container and surrounding the bent flange, with a gap being formed between the mounting flange and an end surface of the bent flange; and The anti-corrosion layer covers the inner wall surface of the liner body and covers at least part of the bent flange and the mounting flange from the inner wall surface of the liner body, and the anti-corrosion layer is stuck in the gap.

2. The water heater inner tank structure according to claim 1, wherein: The mounting flange includes a first flange portion.

3. The water heater inner tank structure according to claim 2, wherein: Along the axial direction of the mounting hole, the first flange portion is away from the inner container body relative to the bent flange, and a height difference is formed between the first flange portion and the bent flange.

4. The water heater inner tank structure according to claim 2 or 3, wherein: The anti-corrosion layer covers at least a portion of the first flange portion.

5. The water heater inner tank structure according to any one of claims 2 to 4, wherein: Along the axial direction of the mounting hole, the first flange portion is 3 mm to 8 mm higher than the bent flange.

6. The water heater inner tank structure according to any one of claims 2 to 5, wherein: The mounting flange also includes a second flange portion, which extends from the first flange portion from one side of the bending flange to the other side of the bending flange, and the gap is formed between the second flange portion and the end surface of the bending flange.

7. The water heater inner tank structure according to claim 6, wherein: The mounting flange further includes a third flange portion, which is disposed on the second flange portion and clamped on the other side of the bent flange.

8. The water heater inner tank structure according to any one of claims 2 to 7, wherein: The bent flange includes an abutment portion, and the anti-corrosion layer includes a first area and a second area, the first area corresponds to the first flange portion, the second area corresponds to the abutment portion, and the second area is suitable for abutting a sealing ring. 9 . The water heater inner tank structure according to claim 8 , wherein along the axial direction of the mounting hole, the first area is farther away from the inner tank body than the second area, so that a height difference is formed between the first area and the second area.

10. The water heater inner tank structure according to any one of claims 8 to 9, wherein: The abutting portion and the second region are respectively planar structures.

11. The water heater inner tank structure according to any one of claims 8 to 10, wherein: The abutting portion and the second region are respectively perpendicular to the axial direction of the mounting hole.

12. The water heater inner tank structure according to any one of claims 1 to 11, wherein: The mounting flange is fixedly welded to the liner body and / or the bent flange.

13. The water heater inner tank structure according to any one of claims 1 to 12, wherein: The width of the gap is 1 mm to 2.5 mm.

14. A water heater, wherein: It comprises a mounting plate, a sealing ring and the water heater inner tank structure according to any one of claims 1 to 13, wherein the mounting plate is suitable for mounting working parts, and the mounting plate and the mounting flange are connected to press the sealing ring between the mounting plate and the bent flange.

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