CN115638540A - Water heater and inner container - Google Patents

Abstract

The invention discloses a water heater and an inner container, which relate to the field of water heaters, wherein the inner container comprises: a flat housing; the housing includes two end caps disposed in a predetermined direction; a reinforcing structure is arranged between the two end covers, the reinforcing structure comprises a supporting structure at least partially arranged in the shell, and at least part of the shell is formed by part of the reinforcing structure. This application can improve the bearing capacity of non-circular inner bag, reliability when improving its use to the life of extension inner bag.

Description

Water heater and inner container

Technical Field

The invention relates to the field of water heaters, in particular to a water heater and a liner.

Background

The existing water heater mainly includes: gas water heaters, heat pump water heaters, solar water heaters, electric water heaters, and the like. The electric water heater is a water heater which takes electricity as energy to heat. Most electric water heaters adopt a water storage type heating mode, and mainly comprise: the inner container, an anode bar for preventing the inner container from being corroded, an electric heating element for heating water in the inner container, and other matched equipment.

At present, an inner container of a common electric water heater sold on the market has a circular overall cross-sectional shape, and the electric water heater with the structure is easily limited by an installation space and is not beautiful visually. In order to improve the visual aesthetic property of the liner and to make reasonable use of the limited installation space, liners having a substantially oval cross-sectional shape have been proposed in the prior art.

However, the pressure-bearing performance of the oval liner is poorer than that of a circular liner in the using process, and the service life of the oval liner is shorter. Therefore, there is a need for further improvements to non-circular liners that address problems that arise during use.

Disclosure of Invention

In order to overcome the defects in the prior art, embodiments of the present invention provide a water heater and a liner, which can improve the pressure-bearing performance of a non-circular liner, improve the reliability of the non-circular liner during use, and thus prolong the service life of the liner.

The specific technical scheme of the embodiment of the invention is as follows:

an inner bladder, comprising: a flat housing; the housing includes two end caps disposed in a predetermined direction; a reinforcing structure is arranged between the two end covers, the reinforcing structure comprises a supporting structure at least partially arranged in the shell, and at least part of the shell is formed by part of the reinforcing structure.

Further, the reinforcing structure comprises a bending part, and at least part of the shell is formed by the bending part.

Furthermore, the bending part is connected with at least one end cover.

Furthermore, the end cover is provided with an opening end, and the bending part is fixedly connected with the opening end of one end cover.

Further, the fixed connection mode includes any one or a combination of the following: the bent part is butted with the open end of one end cover, or the bent part is lapped on the outer wall or the inner wall close to the open end.

Further, the supporting structure comprises a supporting plate, and the supporting plate and the bending part are of an integral structure.

Further, the liner comprises at least two reinforcing structures with the same or different bent parts, each bent part comprises a proximal end connected with the support plate and a distal end far away from the support plate, and the bent parts extend from the proximal ends to the distal ends.

Furthermore, the bending parts of the two reinforcing structures are connected.

Furthermore, at least part of the shell is composed of two adjacent bending parts with the same orientation, wherein the position of one bending part close to the far end is connected with the position of the other bending part close to the near end.

Furthermore, at least part of the shell is composed of two adjacent bending parts facing the same direction, wherein the far end of one bending part is connected with the supporting plate corresponding to the other bending part.

Furthermore, at least part of the shell is composed of two bending parts with the same direction and a barrel body which is arranged between the two bending parts and is not provided with a reinforcing structure, the far end of one bending part is butted or lapped with one end of the barrel body which is not provided with the reinforcing structure, and the near end of the other bending part is butted or lapped with the other end of the barrel body which is not provided with the reinforcing structure.

Furthermore, at least part of the shell is composed of two bending parts with the same direction and a cylinder body which is arranged between the two bending parts and is not provided with a reinforcing structure, the far end of one bending part is butted or lapped with one end of the cylinder body which is not provided with the reinforcing structure, and the bearing plate of the other bending part is butted or lapped with the other end of the cylinder body which is not provided with the reinforcing structure.

Furthermore, transition sections are arranged at the positions of the bending parts, which are close to the bearing plates, and the far end of one bending part is connected with the transition section of the other bending part.

Furthermore, the transition section is step-shaped and comprises a first wall and a second wall, an included angle between the first wall and the preset direction is smaller than an included angle between the second wall and the preset direction, and the far end of one bending part is at least connected with the first wall of the other bending part.

Further, at least part of the shell is composed of two adjacent bending parts facing different directions, and the far ends of the two bending parts or the near ends of the two bending parts are in butt joint or lap joint.

Furthermore, at least part of the shell is composed of two bending parts with different directions and a barrel body which is arranged between the two bending parts and is not provided with a reinforcing structure, and the far ends of the two bending parts or the near ends of the two bending parts are respectively butted or lapped with the two ends of the barrel body which is not provided with the reinforcing structure.

Further, the support plate includes any one of: the arc-shaped plate is a flat-plate-shaped straight plate, deviates from the arc-shaped plate with the bent part protruding, and is close to the arc-shaped plate with the bent part recessed inwards.

Furthermore, the shell further comprises a cylinder body arranged between the two end covers, the reinforcing structure comprises a supporting structure at least partially arranged in the cylinder body and a bending part connected with the supporting structure, and at least part of the cylinder body is formed by the bending part.

Further, at least part of the cylinder body and the end cover are integrally formed.

Further, the partial shell is formed by connecting the bent part with the cylinder body without a reinforcing structure.

Further, a surface projection of the support structure along the predetermined direction at least partially coincides with a projection of a cross section of the housing perpendicular to the predetermined direction in the predetermined direction.

Further, the housing has a major axis and a minor axis in a cross section perpendicular to the predetermined direction.

Further, a reinforcing part is arranged on the supporting structure.

Further, the reinforcing part comprises a flanging and/or a reinforcing rib.

Further, the supporting structure is provided with a communication part.

Furthermore, the edge of the communicating part is provided with a flanging.

Further, an anode rod is arranged on the shell, the anode rod extends into the inner container along the preset direction, and the anode rod penetrates through at least one supporting structure.

Furthermore, at least part of the shell is made of stainless steel materials, carbon steel or plastic materials.

Further, the inner container comprises at least one reinforcing joint, and when a plurality of reinforcing structures are arranged, the interval between every two adjacent reinforcing structures along the preset direction is between 50 and 250 millimeters.

Further, the cross-sectional profile shape of the housing in the direction perpendicular to the predetermined direction includes any one of: elliptical, quasi-elliptical.

Further, the reinforcing structure comprises at least one arcuate plate comprising a first portion disposed within the housing and a second portion configured to form at least a portion of the housing.

Further, the second portion is connected to one of the end caps.

Further, the arc plate is formed with an open end, and the second portion is close to the open end relative to the first portion.

Further, the end caps have open ends, and the second portion is fixedly connected to the open end of one of the end caps.

Further, the inner container comprises at least two arc plates with the open ends facing the same direction or facing different directions.

Furthermore, at least part of the shell is composed of two adjacent arc plates with the opening ends facing the same direction, namely a first arc plate and a second arc plate, wherein the opening end of the first arc plate is connected to a preset position of the second arc plate, and the preset position is a dividing position of the first part and the second part of the second arc plate.

Furthermore, at least part of the shell is composed of two adjacent arc plates with different opening end orientations, namely a first arc plate and a second arc plate, and the opening ends of the first arc plate and the second arc plate are in butt joint or lap joint.

A water heater, comprising: the liner as claimed in any one of the above claims.

The technical scheme of the invention has the following remarkable beneficial effects:

the application provides an inner container with a flat shell, wherein a reinforcing structure is arranged between two end covers of the inner container, and the reinforcing structure comprises a supporting structure at least partially arranged in the shell and a bending part connected with the supporting structure; at least part of the shell is formed by the bent part.

Because the reinforcing structure not only comprises the supporting structure arranged in the shell, but also comprises the bending part capable of forming at least part of the shell, the supporting structure can support the liner on the inner wall of the liner, and the stress in the liner can be redistributed by extending the supporting structure to the shell part (namely forming the bending part forming part of the shell), the stress at the stress concentration position is weakened and dissolved, and the stress concentration position is eliminated; in addition, the reinforcing structure can absorb the deformation pressure of the inner container, and the deformation possibility and degree of the inner container are reduced to the greatest extent, so that the pressure bearing performance of the inner container is greatly improved, the reliability of the inner container in use is improved, and the service life of the inner container is prolonged.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may effect this invention by selecting various possible shapes and proportional dimensions as appropriate.

FIG. 1 is a schematic external view of an inner container according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of an inner container according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a first liner housing according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a second liner housing provided in an embodiment of the present invention;

FIG. 5 is a schematic structural view of a third bladder shell according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a fourth liner shell according to an embodiment of the present invention;

FIG. 7 is a first schematic view illustrating a butt joint position of an end cap and a bent portion according to an embodiment of the present invention;

fig. 8a is a first schematic half-sectional view of a lap joint position of an end cap and a bent portion according to an embodiment of the present invention;

FIG. 8b is a second schematic half-sectional view of a lap joint position of an end cap and a bent portion according to the embodiment of the present invention;

fig. 8c is a third schematic view of the overlapping position of an end cap and a bent portion according to the embodiment of the present invention;

FIG. 9 is a front view of a reinforcing structure provided in an embodiment of the present invention;

FIG. 10 is a side view of a reinforcing structure provided in an embodiment of the present invention;

FIG. 11 is a schematic view of the mating of two adjacent reinforcing structures in the housing provided in FIG. 4;

FIG. 12 is an enlarged fragmentary view of two adjacent reinforcing structures of FIG. 11 in an engaged position;

FIG. 13 is a schematic view of a first housing provided in an embodiment of the present invention;

FIG. 14 is a schematic view of a second housing provided in an embodiment of the present invention;

FIG. 15 is a schematic view of a third housing provided in an embodiment of the present invention;

FIG. 16 is a schematic view of a fourth housing provided in an embodiment of the present invention;

FIG. 17 is a schematic view of a fifth housing provided in an embodiment of the present invention;

FIG. 18 is a schematic view of the installation of a first type of anode rod in the inner container provided in the embodiment of the present application;

FIG. 19 is a schematic view of a second type of anode rod installed in the inner container according to an embodiment of the present disclosure;

FIG. 20 is a cross-sectional view of a bladder provided in accordance with an embodiment of the present application;

FIG. 21 is a schematic view of a sixth housing provided in an embodiment of the present application;

FIG. 22 is a schematic view of another embodiment of the present disclosure providing engagement of two adjacent reinforcing structures;

FIG. 23 is a schematic view of a reinforcing structure provided in embodiments of the present application in cooperation with an end cap or cartridge;

FIG. 24 is a schematic view of another reinforcement structure provided in embodiments of the present application;

FIG. 25 is a schematic view of a first liner provided with the reinforcement structure shown in FIG. 4;

FIG. 26 is a schematic view of a second liner provided with the reinforcement structure shown in FIG. 4;

FIG. 27 is a schematic view of a third bladder provided with the reinforcement structure shown in FIG. 4;

fig. 28 is a schematic structural diagram of an electric water heater provided in an embodiment of the present application.

Reference numerals of the above figures:

10. a housing; 11. a first end cap; 12. a second end cap; 101. a long axis; 102. a short axis; 111. an installation end; 112. an open end; 13. an enamel layer; 14. a metal layer; 20. a reinforcing structure; 210. a support plate; 220. a communicating part; 22. a bending part; 221. a proximal end; 222. a distal end; 23. the cylinder is not provided with a reinforcing structure; 241. a first wall; 242. a second wall; x, a predetermined direction; y, height direction; z, depth direction; 30. an anode rod; 40. an electrical heating element; 201. a first portion; 202. a second portion.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered as falling within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections through intervening media, as well as the detailed meanings of the terms as understood by those skilled in the art. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to improve the bearing performance of the non-circular inner container and improve the reliability of the non-circular inner container in use, thereby prolonging the service life of the inner container, the inner container of the electric water heater is further improved in the application.

Referring to fig. 1 to 27, the liner provided in the present specification may include: a flat housing 10; the housing 10 includes two end caps (i.e., a first end cap 11 and a second end cap 12, respectively) oppositely disposed along a predetermined direction X; a reinforcing structure 20 is arranged between the two end caps, said reinforcing structure 20 comprising a support structure arranged at least partly inside said shell 10, at least part of said shell being constituted by part of said reinforcing structure 20.

In a first type of embodiment, the reinforcing structure 20 may comprise a bend 22. When the reinforcing structure 20 includes the bending portion 22, at least a part of the housing 10 is formed by the bending portion 22. The bending portion 22 may be disposed at an edge of the supporting structure, and an extending direction of the bending portion 22 may be different from an extending direction of the supporting structure, that is, a curvature of the bending portion 22 is different from a curvature of the supporting structure.

In addition, in the second embodiment, the reinforcing structure 20 may be a whole arc-shaped plate structure, i.e. the difference between the bending portion and the supporting structure is that there is no direct boundary in terms of appearance compared to the above-mentioned embodiments. It can also be understood that: the bend has the same curvature as the support structure.

In this specification, the above two cases will be separately described. The first embodiment is mainly used for detailed explanation.

In the present specification, the housing 10 may have a flat hollow structure, and the cross-sectional profile of the housing 10 in the direction perpendicular to the predetermined direction X (the predetermined direction X may be an extending direction of the entire housing 10) may be non-circular. For example, when the liner is a horizontal liner, the predetermined direction X may be substantially horizontal, with reference to the installation environment. The angle between the predetermined direction X and the horizontal direction may be 0 degrees or a smaller angle. The smaller angle may be due to installation errors, may be created during use, or may be due to other factors. The smaller angle may vary depending on the factors involved, and the specific value thereof is not specifically limited herein, and may be, for example, generally within 10 degrees.

When the liner is a vertical liner, the predetermined direction X may be substantially vertical. At this time, the angle between the predetermined direction X and the vertical direction may be 0 degree or a smaller angle. The smaller angle may be due to installation errors, may be created during use, or may be due to other factors. The smaller angle may vary depending on the factors involved, and the specific value thereof is not specifically limited herein, and may be, for example, generally within 10 degrees.

Certainly, the situation that the liner needs to be installed obliquely in some special installation environments is not excluded, and at this time, the predetermined direction X is an included angle which forms a larger angle with the horizontal direction or the vertical direction. The included angle of the larger angle may vary according to different factors affecting the installation environment, and the specific value thereof is not specifically limited in this application, for example, the included angle may be greater than 15 degrees.

Further, it should be noted that: the liner listed in the embodiment of the present application mainly refers to a horizontal liner, and is described with reference to the accompanying drawings, and liners of other installation forms can refer to the installation form by analogy (only need to rotate the liner by a certain angle in space on the basis of the horizontal liner), and detailed descriptions are not repeated here.

After the inner container with the overall flat shell 10 is installed on a wall surface, the depth size occupied by the inner container can be reduced, the visual attractiveness of the inner container is improved, and the limited installation space can be reasonably utilized.

Specifically, the cross-sectional profile shape of the housing 10 in the direction perpendicular to the predetermined direction X includes any one of: elliptical, quasi-elliptical. Of course, the shape of the cross-sectional profile of the housing 10 perpendicular to the predetermined direction X is not limited to the above examples, and those skilled in the art can reasonably design the housing in an extensive manner.

In general, the casing 10 may comprise, in a section perpendicular to the predetermined direction X, for example with the liner mounted close to a vertical wall: the maximum dimension along the height direction Y, and the minimum dimension along the depth direction Z perpendicular to the vertical wall surface, are greater than the minimum dimension. Generally, in order to ensure that the inner container has better pressure-bearing performance, the maximum size and the minimum size are transited through one or more circular arcs.

It should be noted that: the liner recited in the embodiments of the present application is mainly exemplified by a structure in which the cross-sectional profile shape perpendicular to the predetermined direction X is an ellipse, and the description is given with reference to the accompanying drawings, and liners of other shapes can be equivalently replaced with reference to the ellipse liner, and the detailed description of the present application is omitted here.

As shown in fig. 2, when the cross-sectional profile of the housing 10 perpendicular to the predetermined direction X is an ellipse, the housing 10 has a major axis 101 and a minor axis 102 in a cross-section perpendicular to the predetermined direction X. The major axis 101 may be the largest dimension and the minor axis 102 may be the smallest dimension.

In the present specification, the housing 10 may include two end caps disposed along the predetermined direction X. The two end caps may be a first end cap 11 and a second end cap 12, wherein the first end cap 11 and the second end cap 12 may be disposed in the same direction or in opposite directions. The end cap has a closed end mounting end 111 and an open end 112 opposite along the predetermined direction X.

As shown in fig. 6, when the first end cap 11 and the second end cap 12 are disposed opposite to each other, the open end 112 of the first end cap 11 and the open end 112 of the second end cap 12 are close to each other.

As shown in fig. 21, when the first end cap 11 and the second end cap 12 are disposed in the same direction, the open end 112 of the first end cap 11 may be close to the mounting end 111 of the second end cap 12. It should be noted that: the mounting end 111 may be provided with an interface, such as a flange interface or the like, for mounting other functional components of the liner.

Each of the end caps may include only a cap portion, or may include a cap portion and a barrel portion extending outwardly from the open end 112 of the cap. The barrel portion has a length dimension in said predetermined direction X, the specific value of which is specifically defined herein. When the end cap comprises a head part and a barrel part, the head part and the barrel part can be integrally formed, or can be in sealing connection through welding and the like.

As shown in fig. 3, when the first end cap 11 and the second end cap 12 each include only a capped portion, the first end cap 11 and the second end cap 12 may be directly butted, and the reinforcing structure 20 is located at a position where the first end cap 11 and the second end cap 12 are butted.

Alternatively, as shown in fig. 4, when the first end cap 11 and the second end cap 12 each include only a head portion, at least one intermediate transition structure (e.g., a substantially cylindrical reinforcing structure 20) may be disposed between the first end cap 11 and the second end cap 12. The first end cap 11, the second end cap 12 and the reinforcing structure 20 may be connected by sealing, for example, by welding. Of course, the manner of the sealing connection is not limited to the above examples, and the application is not limited thereto. In this specification, the welding is mainly used as an example, and other sealing connection methods can be referred to.

Alternatively, as shown in fig. 5, when the first end cap 11 includes a sealing head portion and a substantially cylindrical reinforcing structure 20, and the second end cap 12 includes a sealing head portion and a substantially cylindrical reinforcing structure 20, the first end cap 11 and the second end cap 12 may be directly butted. Furthermore, at least one intermediate transition structure can be arranged between the two. The intermediate transition structure may include at least one or a combination of the following: the cylinder 23 and the reinforcing structure 20 are not provided with the reinforcing structure.

Alternatively, as shown in fig. 6, when one of the end caps, for example the first end cap 11, includes only a head portion and the other end cap, for example the second end cap 12, includes a head portion and a generally cylindrical reinforcing structure 20, the two end caps may be directly butted. Furthermore, at least one intermediate transition structure may also be provided between the two end caps. The intermediate transition structure may include at least one or a combination of the following: the cylinder 23, which is not provided with the reinforcing structure, may also include the reinforcing structure 20.

When the inner container is used, the pressure in the inner container can be increased in the process that water contained in the inner container is heated, so that the inner container needs to bear larger pressure during working. For non-circular liners, such as elliptical liners, the liner may be stressed to varying degrees at various locations. When the stress reaches a certain level, deformation of the inner container may be caused, and particularly, leakage may occur at a stress concentration position.

Generally, the larger the volume of the inner container, the greater the pressure it needs to withstand during operation. The technical scheme that this application provided mainly needs the inner bag that bears great pressure during operation, is particularly useful for the inner bag that the volume is more than 20L. For the inner container with more than 20 liters, the pressure to be borne by the inner container is larger when the inner container works. Therefore, it is particularly necessary to improve the structure of the liner so as to enhance the pressure-bearing performance of the liner. Specifically, the volume of the liner may be 20 liters, 30 liters, 50 liters, 60 liters, 80 liters, etc., and the specific value of the volume of the liner is not limited herein.

In this specification, for one of purposes: in other words, in order to improve the pressure-bearing performance of the non-circular inner container (particularly, an inner container having a volume of 20L or more) and to improve the reliability in use, a reinforcing structure 20 is provided between the two end caps. The reinforcing structure 20 may include: a support structure disposed at least partially within the housing 10, and a bend 22 connected to the support structure; at least part of the housing 10 is formed by the bending part 22.

Because the reinforcing structure 20 not only comprises the supporting structure arranged in the shell 10, but also comprises the bent part 22 capable of forming at least part of the shell 10, the supporting structure can support the liner on the inner wall of the liner, and the stress in the liner can be redistributed by extending the supporting structure to the part of the shell 10 (namely, the bent part 22 forming part of the shell 10 is formed), the stress at the stress concentration position is weakened and dissolved, and the stress concentration position is eliminated; in addition, utilize this additional strengthening 20 can absorb the deformation pressure of inner bag, furthest has reduced the possibility and the degree that the inner bag appears deforming to improve the pressure-bearing performance of this inner bag greatly, improved the reliability when the inner bag uses, prolonged the life of inner bag.

In one embodiment, the bend 22 is connected to at least one of the end caps.

Specifically, the end cap has opposite mounting and open ends 111, 112 along the predetermined direction X. The bending part 22 is fixedly connected with the open end 112 of one end cover. In addition, the bending portion 22 can also be fixedly connected with the mounting end 112 of one of the end caps. As shown in fig. 21, the bent portion 22 of the left-side reinforcing structure 20 is fixedly connected to the mounting end 111 of the end cap, and the bent portion 22 of the right-side reinforcing structure 20 is fixedly connected to the open end 112 of the end cap.

Overall, the flat housing 10 can be formed by welding a plurality of sections of a certain wall thickness. When the bent part 22 is fixedly connected with the open end 112 of one of the end caps, the fixed connection mode includes any one or combination of the following modes: the bent part 22 is butted against the open end 112 of one of the end caps, or the bent part 22 is lapped on the outer wall and/or the inner wall near the open end 112.

Specifically, the end cap has an opposite mounting end 111 and an open end 112, and the open end 112 forms a relatively closed liner structure by being matched with other parts. As shown in fig. 7, the bent portion 22 may be abutted with an open end 112 of an end cap (e.g., the first end cap 11). As shown in fig. 8a, the bent portion 22 overlaps the outer wall near the open end 112. As shown in fig. 8b, the bent portion 22 overlaps the inner wall near the open end 112.

Furthermore, as shown in fig. 8c, the bent portion 22 may partially overlap the outer wall near the open end 112 and partially overlap the inner wall near the open end 112.

Relatively speaking, when adopting overlap joint welded mode to realize being connected between portion of bending 22 and the end cover, can establish the relation through the cover that both cooperation positions formed on the one hand, improve the stability and the reliability of cooperation position structure, on the other hand, owing to be formed with the coincidence section in the overlap joint position, can reduce welding process's the degree of difficulty, improve welding position's reliability simultaneously.

The other end cap (e.g., second end cap 12) may be welded to the bend 22. In addition, an intermediate transition structure may also be disposed between the second end cap 12 and the bent portion 22. In particular, the intermediate transition structure may include at least one reinforcing structure 20.

For example, the liner may include a first end cap 11 on the left side, a second end cap 12 on the right side, and a plurality of reinforcing structures 20 between the first end cap 11 and the second end cap 12, wherein the bent portions 22 of the plurality of reinforcing structures 20 may form an entire cylinder section, which may be a main body part of the casing 10 except for the end caps. Specifically, the number of the reinforcing structures 20 may be one, two, three, or even three or more. In general, the number of the reinforcing structures 20 may be different according to the shape, size, wall thickness requirement, etc. of the liner, and the application is not limited in detail herein.

In the embodiment of the present specification, the number of the reinforcing structures 20 may be at least one. When the reinforcing structures 20 are plural, the interval between two adjacent reinforcing structures 20 along the predetermined direction X is between 50 mm and 250 mm.

When the distance between two adjacent reinforcing structures 20 is controlled within the above distance range, the liner can be effectively supported in the using process of the liner, and the possibility and degree of deformation of the liner are reduced. When the distance between two adjacent reinforcing structures 20 is less than 50 mm, the supporting effect of the liner is relatively limited, but the manufacturing cost of the liner is significantly increased. When the distance between two adjacent reinforcing structures 20 is greater than 250 mm, the possibility and degree of deformation of the inner container may not be sufficient for the design.

The inventor proves that: when the distance between two adjacent supporting structures is greater than 250 mm, for the existing thin-wall shell 10 (the general wall thickness is between 1.5 mm and 2 mm, and the wall thickness of the general household electric water heater is within 4 mm at most), the rigidity and the strength of the shell cannot meet the reliability requirements, the inner container is easy to generate larger deformation, and the problems of permanent deformation, enamel layer collapse and the like caused by collapse are easy to occur.

Of course, the intermediate transition structure may also include other structures, such as at least one section of a cylinder, which may be a cylinder without the reinforcing structure 20. In general, the composition and form of the intermediate transition structure may be adaptively adjusted according to the shape, size, etc. of the actual liner, and the application is not specifically limited herein.

Referring to fig. 9 and 10, in one embodiment, the supporting structure includes a supporting plate 210, and the supporting plate 210 and the bending portion 22 may be an integral structure.

In the present embodiment, the supporting structure may include a supporting plate 210 having a plate shape as a whole, and the supporting plate 210 and the bent portion 22 may be integrated, so that on one hand, the manufacturing cost may be reduced; on the other hand, the sealing performance of the matching position of the two can be ensured; furthermore, the probability of the occurrence of stress concentration sites can be reduced as much as possible. Specifically, the bending portion 22 may be a bending structure formed on an edge of the supporting plate 210. Of course, it is not excluded that in other embodiments, the support plate 210 and the bending portion 22 are connected by other means, such as welding.

Specifically, the support plate 210 may include any one or a combination of the following: the bending part 22 is a convex arc-shaped plate which is a flat-plate-shaped straight plate, deviates from the bending part 22 and is close to the arc-shaped plate which is concave in the bending part 22. When the support plate 210 is in the form of a straight plate, an outward convex arc plate, an inward concave arc plate, or the like, it is beneficial for the support plate 210 and the bending portion 22 to form an integrated structure by bending. It should be noted that: in the drawings provided in this specification, the support plate 210 is illustrated schematically mainly by an arc-shaped plate protruding away from the bend 22.

Of course, the supporting plate 210 may be a combination of the above-mentioned various types of plates besides the above-mentioned straight plate, convex arc plate, concave arc plate, etc., and in addition, the supporting plate 210 may also be partially a convex plate, partially a concave plate, or partially a straight plate. The convex portion and the concave portion of the support plate 210 may be arranged according to their supporting function to the housing 10. Of course, the supporting plate 210 may also have other regular or irregular shapes, and even the supporting plate 210 may not be a plate-shaped structure as a whole, for example, a spatial structure formed by spatial configuration may be used, which is not exhaustive in the present application, but the technical solutions that can achieve the technical effects that can be achieved by the present application as long as the supporting plate 210 is matched with the bending portion 22 should be included in the protection scope defined by the claims of the present application.

Further, the inner container may include at least two of the bending portions 22 facing the same or different reinforcing structures 20. The bend 22 comprises a proximal end 221 connected to the support plate 210 and a distal end 222 distal from the support plate 210. The bending portion 22 is oriented in a direction extending from the proximal end 221 to the distal end 222.

Referring to fig. 4 and 11, in one embodiment, at least a portion of the housing 10 is formed by two adjacent bending portions 22 facing the same direction. The position of one of the bending parts 22 near the distal end 222 is connected with the position of the other bending part 22 near the proximal end 221.

In the present embodiment, a plurality of bent portions 22 having the same orientation may be provided between the two end caps, and two adjacent bent portions 22 may be sequentially welded. The position of one bending part 22 near the distal end 222 is welded and connected with the position of the other bending part 22 near the proximal end 221.

Referring to fig. 11 and fig. 12, further, a transition section is disposed at a position of the bending portion 22 close to the supporting plate 210, wherein a distal end 222 of one bending portion 22 is welded and connected to the transition section of the other bending portion 22.

In the present embodiment, when the distal end 222 of one bending portion 22 is welded to the transition section of another bending portion 22, the inventor finds by verification that: the deformation of the inner container in the use process can be effectively controlled by the matching positions of the two bending parts 22, and the deformation pressure of the inner container is absorbed.

In a specific embodiment, the transition section may be stepped, and includes a first wall 241 and a second wall 242, an included angle between the first wall 241 and the predetermined direction X is smaller than an included angle between the second wall 242 and the predetermined direction X, and the distal end 222 of one of the bent portions 22 is welded to at least the first wall 241 of another bent portion 22.

In this embodiment, the bending portion 22 may include a main body segment extending along the predetermined direction X and a transition segment disposed on a side (proximal end 221) adjacent to the support plate 210. The transition section may be stepped, which may include a first wall 241 and a second wall 242. The first wall 241 may be connected to the support plate 210, and the second wall 242 may be connected to the main body of the bent portion 22. As a whole, the extending direction of the first wall 241 may be consistent with the predetermined direction X, and when the first wall 241 is welded to the distal end 222 of the other bending portion 22, because the first wall 241 and the distal end 222 of the other bending portion 22 have the same extending direction as a whole, when the first wall 241 and the distal end 222 of the other bending portion 22 are lap-welded, it is beneficial to ensure the reliability of welding, the sealing performance of the welding position, and reduce the difficulty of welding.

The second wall 242 may extend perpendicularly or at an angle to the predetermined direction X. The second wall 242 can abut against the distal end 222 of the other bending portion 22, and can be welded to the distal end 222 of the bending portion 22.

Alternatively, as shown in fig. 22, when at least a part of the housing 10 is formed by two adjacent and identically oriented bends 22, the distal end 222 of one of the bends 22 may be further connected to the support plate 210 corresponding to the other bend 22.

In the present embodiment, the reinforcing structure 20 positioned on the left side may be a first reinforcing structure, and the reinforcing structure 20 positioned on the right side may be a second reinforcing structure, and the bent portion 22 of the second reinforcing structure may be connected to the support plate 210 of the first reinforcing structure.

In another specific embodiment, as shown in fig. 13, at least a part of the housing 10 is composed of two bent portions 22 with the same orientation and a cylindrical body 23 without a reinforcing structure disposed between the two bent portions 22, a distal end 222 of one of the bent portions 22 is butt-welded or lap-welded to one end of the cylindrical body 23 without a reinforcing structure, and a proximal end 221 of the other bent portion 22 is butt-welded or lap-welded to the other end of the cylindrical body 23 without a reinforcing structure.

In the present embodiment, the difference from the above embodiment is that: a cylinder 23 without a reinforcing structure is also arranged between the two bends 22 facing the same. When the cylinder 23 without the reinforcing structure is welded to the adjacent bending part 22, the distal end 222 of one bending part 22 may be butted or lap-welded to one end of the cylinder, and the proximal end 221 of the other bending part 22 may be butted or lap-welded to the other end of the cylinder.

When the distal end 222 of one bending portion 22 is butted against one end of the cylinder, the two ends may be welded or connected by other sealing connection methods. When the distal end 222 of one bending part 22 overlaps with one end of the cylinder, the distal end of the bending part 22 can overlap the inner wall of the cylinder or the outer wall of the cylinder.

When the near end 221 of the other bending part 22 is connected with the other end of the cylinder, the end of the other end of the cylinder can be directly butt-welded to the bending part 22, and in addition, the inner wall of the cylinder close to the other end can be lapped on the bending part 22.

Furthermore, with reference to the above-described embodiment in which the two folds 22 facing in the same direction cooperate, the cylinder can be attached to the support plate 210 of the reinforcing structure 20 when the reinforcing structure is attached to the cylinder.

In a specific embodiment, please refer to fig. 23 in combination, at least a portion of the housing 10 is composed of two bending portions 22 facing the same direction and a cylinder 23 disposed between the two bending portions 22 and having no reinforcing structure, a distal end 222 of one of the bending portions 22 is butted or overlapped with one end of the cylinder 23 having no reinforcing structure, and a supporting plate 210 of the other bending portion 22 is butted or overlapped with the other end of the cylinder 23 having no reinforcing structure.

In the present embodiment, the difference from the above embodiment is that the other end of the cylindrical body is engaged with the support plate 210 of the reinforcing structure 20. When the distal end 222 of one bending portion 22 is butted or overlapped with one end of the cylinder 23 without the reinforcing structure, reference may be made to the above embodiments, which are not described herein again. When the other end of the cylinder is engaged with the support plate 210 of the reinforcing structure 20, reference is made to fig. 23. Specifically, the other end of the cylinder may be welded to the support plate 210 by butt-joint. In addition, a certain flange may be formed at the other end of the cylinder, and the cylinder provided with the flange may be fixed on the support plate 210 in a sealing manner by means of overlapping.

Referring again to fig. 23, when the reinforcing structure 20 is attached to the end cap, the end cap may be attached to the support plate 210 of the reinforcing structure 20. While the specific connection manner of the support plate 210 of the reinforcing structure 20 and the end cap can refer to the specific description above of the connection between the support plate 210 of the reinforcing structure 20 and the other end of the cylinder, the detailed description of the present application is omitted here.

As shown in fig. 14 and 15, in one embodiment, at least part of the shell 10 is composed of two adjacent and differently oriented bends 22, and the distal ends 222 (shown in fig. 14) of the two bends 22 or the proximal ends 221 (shown in fig. 15) of the two bends 22 are butted or overlapped.

In this embodiment, the at least part of the housing 10 may be understood as a part of a cylinder or a whole cylinder between two end caps. The entire cylinder may be formed by two adjacent and differently oriented bends 22. The distal ends 222 of the two bent portions 22 can be connected by butt welding or lap welding. Furthermore, the partial cylinder may be composed of two adjacent and differently oriented folds 22, that is, the liner may further include other portions capable of forming the shell 10 thereof, including but not limited to the same or different oriented folds 22, the partial cylinder without the reinforcement structure 20, or a combination thereof.

As shown in fig. 16 and 17, in one embodiment, at least a part of the shell 10 is composed of two bent portions 22 with different orientations and a barrel 23 disposed between the two bent portions 22 without a reinforcing structure, and the distal ends 222 (shown in fig. 16) of the two bent portions 22 or the proximal ends 221 (shown in fig. 17) of the two bent portions 22 and the two ends of the barrel 23 without a reinforcing structure are butt-welded or lap-welded, respectively.

In this embodiment, the at least part of the housing 10 may be understood as a part of a cylinder or a whole cylinder between two end caps. The overall cartridge may include: two bent portions 22 with different orientations, and a cylinder 23 which is arranged between the two bent portions 22 and is not provided with a reinforcing structure. The distal ends 222 of the two bending portions 22 may be butt-welded or lap-welded to the two ends of the cylinder 23 without the reinforcing structure. In addition, the two bent portions 22 facing different directions and the tube 23 disposed between the two bent portions 22 without the reinforcing structure may form part of the tube of the casing 10, and the liner may also include other portions capable of forming the casing 10, including but not limited to the bent portions 22 facing the same or different directions, the tube without the reinforcing structure 20, or a combination thereof.

In one embodiment, the housing 10 may further include a cylinder disposed between the two end caps, and the reinforcing structure 20 includes a support structure at least partially disposed in the cylinder and a bent portion 22 connected to the support structure, and at least a portion of the cylinder is formed by the bent portion 22.

In this embodiment, a cylinder may be provided between the two end caps. The cartridge may be the main body portion of the housing 10 except for the two end caps. The reinforcing structure 20 may comprise a support structure at least partially arranged inside the cylinder and a bend 22 connected to the support structure, at least part of the cylinder being formed by the bend 22.

The bent portion 22 of the reinforcing structure 20 may constitute the whole cylinder or a part of the cylinder. When the bending portions 22 of the reinforcing structure 20 constitute the whole tubular body, and there are a plurality of reinforcing structures 20, the directions of the bending portions 22 of the plurality of reinforcing structures 20 may be the same or different. Specifically, the arrangement and connection of the bending portions 22 in the same or different directions may refer to the detailed description of the above embodiments, and the description of the present application is not repeated.

When the bent portions 22 of the reinforcing structure 20 constitute a partial cylindrical body, and the number of the reinforcing structures 20 is plural, the directions of the bent portions 22 of the plural reinforcing structures 20 may be the same or different. Specifically, the arrangement and connection of the bending portions 22 in the same or different directions may refer to the detailed description of the above embodiments, and the description of the present application is not repeated. In addition, the shell 10 may further be provided with a cylinder 23 portion without a reinforcing structure, and the matching manner and the connection manner between the cylinder 23 portion without a reinforcing structure and the reinforcing structure 20 may also refer to the detailed description of the above embodiments, and the detailed description of the present application is not repeated here.

Further, at least part of the barrel may be integrally formed with the end cap.

In this specification, as described in the above embodiments, the end cap may include only the sealing portion, or may include the sealing portion and at least a part of the barrel, and in this case, the end cap and at least a part of the barrel may be integrally formed, for example, may be deep-drawn.

In one embodiment, the partial shell 10 is formed by welding the bent portion 22 and the cylinder 23 without the reinforcing structure.

In the present embodiment, the partial shell 10 of the inner container may be formed by welding the bent portion 22 and the cylindrical body 23 without the reinforcing structure. In particular, the portion of the housing 10 may be the housing 10 between two end caps. Alternatively, the partial housing 10 may be a partial housing 10 between two end caps. Alternatively, the cylinder 23 without the reinforcing structure may be integrally formed with the end cap.

When the cylinder 23 without the reinforcing structure and the end cover are integrally formed, specifically, the first end cover 11 may include the end socket and the cylinder 23 without the reinforcing structure, the second end cover 12 may also include the end socket and the cylinder 23 without the reinforcing structure, and a bending portion 22 may be provided between the two. Alternatively, one of the first and second end caps 11 and 12 may include a sealing head and a cylinder 23 without a reinforcing structure, and the cylinder may be welded to the bent portion 22 to form the complete casing 10.

In one embodiment, a surface projection of the support structure along the predetermined direction X at least partially coincides with a projection of a cross section of the housing 10 perpendicular to the predetermined direction X in the predetermined direction X.

In this embodiment, the supporting structure may comprise a supporting plate 210, and a surface of the supporting plate may completely or at an opening end approximately facing the end cap, so that a projection of the surface of the supporting structure in the predetermined direction X and a projection of the end cap in the predetermined direction X at least partially coincide, thereby effectively supporting the casing 10 of the inner container. The support plate 210 has first and second opposing surfaces. The support plate 210 may be disposed entirely in a direction perpendicular to the predetermined direction X. The surface of the support plate 210 may be entirely perpendicular or nearly perpendicular to the predetermined direction X. For example, when the support plate 210 is a plate body having a uniform thickness, the first surface and the second surface thereof may be perpendicular or nearly perpendicular to the predetermined direction X. When the supporting plate 210 is perpendicular to the predetermined direction X, the surface of the supporting plate 210 may form an angle of 90 degrees with the predetermined direction X; the acute included angle between the surface of the support plate and the predetermined direction X may be within 10 degrees when the support plate is close to perpendicular to the predetermined direction X.

Of course, in some cases, for example for mounting purposes, or to prevent the support plate 210 from interfering with other parts of the bladder, the support plate 210 may form an angle with a plane perpendicular to the predetermined direction X. Wherein the degree of the included angle can be within 45 degrees.

Overall, the projection of the surface (first surface or second surface) of the support structure along the predetermined direction X and the projection of the cross section of the housing 10 perpendicular to the predetermined direction X in the predetermined direction X may coincide or may be covered by the projection of the cross section of the housing 10 perpendicular to the predetermined direction X.

In the above embodiment, when the casing 10 of the inner container is manufactured, several parts may be hermetically connected by welding. The welding mode may include: each weld is welded separately or multiple welds are welded simultaneously.

When a mode of simultaneously welding a plurality of welding seams is adopted, the welding efficiency is relatively higher. In order to provide reliability and convenience in simultaneous welding of a plurality of welds, a plurality of parts may be simultaneously fixed to a member, and the member is rotated during welding to ensure simultaneous welding of a plurality of welds spaced along the predetermined direction X.

In one embodiment, as shown in fig. 9, the support structure is provided with a communication portion 220. The communication portion 220 is provided to communicate water on both sides of the support structure.

Specifically, at least one of the communication portions 220 is provided in the middle-upper portion of the support structure in the height direction Y.

Generally, the water temperature in the inner container has a layering effect, the water in the inner container gradually rises from bottom to top in the height direction Y, the water temperature at the uppermost part in the inner container reaches a high value, the water outlet of the water outlet pipe generally extends into the inner container, and the top end of the water outlet pipe is generally positioned at the middle upper part of the inner container so as to supply the water heated by the first time at the middle upper part of the inner container to a user.

When at least one communication part 220 is arranged at the middle upper part of the supporting structure along the height direction Y, the communication part 220 at the position can be used for communicating the water at the middle upper part of the inner container, so that the water at the part can be timely guided to the water outlet pipe to be supplied to a user.

In one embodiment, the support structure is provided with a plurality of communication portions 220, and at least two communication portions 220 are at least partially distributed in a staggered manner along the height direction Y.

In the present embodiment, after the plurality of communication portions 220 are provided on the supporting structure and the plurality of communication portions 220 indicate the dislocation distribution along the height direction Y, it can be ensured that the water with different heights (i.e. different temperatures) can be communicated, wherein when the communication portions 220 at the higher positions are communicated, it can be ensured that the water at the higher positions of the inner container can be instantly heated to form hot water to be supplied to the user.

In one embodiment, in order to increase the strength of the supporting structure and prevent it from being deformed or even damaged due to stress concentration at the location of the communication portion 220, the communication portion 220 may be provided with a flanging at the edge.

In one embodiment, as shown in fig. 18, an anode rod 30 is provided on the casing 10, the anode rod 30 extends into the inner container along the predetermined direction X, and the anode rod 30 penetrates at least one of the support structures.

In the present embodiment, the case 10 may be provided with an anode rod 30 for preventing corrosion of the inner container. The anode rod 30 may extend into the inner container along the predetermined direction X, and certainly, in consideration of installation errors and interference problems with other components, the extending direction of the anode rod 30 may have a certain deviation from the predetermined direction X, and a specific deviation angle may be different according to different actual products, which is not limited in this application. The anode rod 30 can penetrate at least one of the support structures, so that the inner wall of the liner can be protected from corrosion as comprehensively and efficiently as possible. Preferably, the anode rod 30 may directly penetrate all of the support structures, thereby efficiently protecting all of the inner walls of the inner container from corrosion.

As shown in fig. 19, in one embodiment, the supporting structure divides the housing 10 into at least two cavities along the predetermined direction X, an anode rod 30 is mounted on the housing 10, and the anode rod 30 extends into the cavities from bottom to top along the height direction Y.

In this embodiment, the anode rod 30 may extend into the cavity from the bottom to the top along the height direction Y as a whole, thereby protecting the inner container wall from corrosion. Specifically, the supporting structure may divide the housing 10 into a plurality of cavities, and the cavities may be communicated with each other through the communication portion 220, and at this time, the number of the anode rods 30 may be one, and the anode rods extend into one of the cavities from bottom to top along the height direction Y. Of course, the number of the anode rods 30 may also be multiple, and when the number of the anode rods is multiple, one anode rod 30 may be disposed in each of the multiple cavities, or certainly, one anode rod 30 may be disposed in each of the partial cavities.

As shown in fig. 20, in one embodiment, an enamel layer 13 is further disposed on the inner wall of the housing 10, and the enamel layer 13 is formed by any one of the following methods: slurry shaking mode, enamel spraying mode and electrostatic adsorption mode.

In this embodiment, at least a portion of the housing 10 may include a metal layer 14 having a wall thickness. Specifically, the material of the metal layer 14 may include: such as a stainless steel layer, carbon steel. In addition, an enamel layer 13 may be further disposed on the inner wall of the metal layer 14, and the enamel layer 13 is used to prevent the metal layer 14 from rusting, so that the metal layer 14 will not form an oxide layer on the surface when heated and can resist corrosion of various liquids.

When the liner is manufactured, the enamel layer 13 can be formed in a slurry shaking mode, an enamel spraying mode, an electrostatic adsorption mode and the like. For example, when the enamel layer 13 of the liner is formed by slurry shaking, it can be performed after the whole casing 10 is welded, and the formed enamel layer 13 is not affected by the subsequent processes.

In addition, this enamel layer 13 can also form through the mode of spraying enamel or electrostatic absorption, through spraying enamel mode or electrostatic absorption mode for shaking the thick liquid mode more be favorable to controlling enamel layer 13's thickness, guarantees the homogeneity of enamel layer 13 thickness. For example, when formed by enamelling, this step may be performed before welding of the shell 10, with subsequent welding of the parts. During welding, there may be some damage to the enamel layer 13 at the welding site.

In addition, the material of the main body portion of the housing 10 is not limited to the metal material described in the above embodiment, and may be plastic or other organic or inorganic material.

There is also provided in the present application a water heater comprising: the liner according to any of the above embodiments. The water heater provided with the inner container can achieve the technical effect corresponding to the embodiment of the inner container, and specific reference is made to the detailed description of the embodiment, which is not repeated herein. Specifically, the water heater may be an electric water heater, and certainly, the water heater may also be an energy storage water heater with an inner container in other forms, for example, a heat pump water heater, a solar water heater, and the like. In this specification, an electric water heater is mainly exemplified.

It should be noted that the specific structure of the reinforcing structure 20 is not limited to the above example. The reinforcing structures 20 may be integrally a plate with a radian, when two adjacent reinforcing structures 20 are connected, the open end of one reinforcing structure 20 is lapped on the outer wall of the other reinforcing structure 20, and the two reinforcing structures realize a matching relationship of partial sleeving. In this embodiment, the bent portion 22 of the reinforcing structure 20 can be understood as a portion from the overlapping position to the open end.

As shown in fig. 24, in one embodiment, the reinforcing structure 20 includes: at least one arcuate plate comprising a first portion 201 disposed within said housing 10 and a second portion 202 for forming at least part of said housing 10. The arcuate plate is formed with an open end, and the second portion 202 is adjacent the open end relative to the first portion 201.

In the present embodiment, the function of the second portion 202 is equivalent to the function of the bent portion 22 in the above-described embodiment. The function of the first portion 201 is equivalent to that of the support plate 210 in the above embodiment. When a reinforcing structure 20 in the form of an arc-shaped plate is provided in the liner, embodiments of the different forms of liner that can be formed therewith can be analogized to the detailed description with reference to the various embodiments described above. The liner provided with the reinforcement structure 20 in the form of an arc-shaped plate will be described schematically with reference to fig. 25, 26 and 27.

In this embodiment, the second portion 202, which is adjacent to the open end of the arcuate plate, is attached to one of the end caps. As shown in fig. 25 and 26, in particular, the end caps have open ends 112, and the second portion 202 is fixedly connected to the open end 112 of one of the end caps. The fixed connection mode can be butt welding or lap welding. In addition, as shown in fig. 27, the second portion 202 may also be fixedly connected to the mounting end 111 of one of the end caps.

In one embodiment, the liner includes at least two curved plates with open ends facing the same or different directions.

When the inner container includes at least two arc plates with the same open end, at least part of the casing 10 is composed of two adjacent arc plates with the same open end, namely a first arc plate and a second arc plate, wherein the open end of the first arc plate is connected to a preset position of the second arc plate, and the preset position is a boundary position of a first part and a second part of the second arc plate.

When the inner container comprises at least two arc plates with different open end orientations, at least part of the shell 10 is composed of two adjacent arc plates with different open end orientations, namely a first arc plate and a second arc plate, and the open ends of the first arc plate and the second arc plate are butted or overlapped.

Referring to fig. 28, the liner of the electric water heater may include other parts besides the core improved part housing 10, for example: water inlet pipe, water outlet pipe, electric heating element 40, etc. One or more electric heating elements 40 may be provided. When the electric heating element 40 is provided in plurality, the plurality of electric heating elements 40 may be arranged at intervals along the height direction Y.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of 8230comprises the elements, components or steps identified and other elements, components or steps which do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims (38)

1. A liner, comprising:

a flat housing;

the housing includes two end caps disposed in a predetermined direction;

a reinforcing structure is arranged between the two end covers, the reinforcing structure comprises a supporting structure at least partially arranged in the shell, and at least part of the shell is formed by part of the reinforcing structure.

2. The bladder according to claim 1 wherein said reinforcing structure comprises folds and said at least some of said shells are formed from said folds.

3. The liner according to claim 2, wherein the bent portion is connected to at least one of the end caps.

4. The liner according to claim 3, wherein the end caps have open ends, and the bent portion is fixedly connected to the open end of one of the end caps.

5. The liner according to claim 4, wherein the means of fixed connection comprises any one or a combination of the following: the bent part is butted with the open end of one end cover, or the bent part is lapped on the outer wall and/or the inner wall close to the open end.

6. The liner according to claim 2, wherein the support structure comprises a support plate, and the support plate and the bending part are of an integral structure.

7. The liner according to claim 6, wherein the liner comprises at least two reinforcing structures with the same or different orientations of the bending portions, the bending portions comprise a proximal end connected with the support plate and a distal end away from the support plate, and the orientations are directions extending from the proximal end to the distal end.

8. The bladder according to claim 7 wherein the folds of said reinforcing structure are connected.

9. The bladder according to claim 8 wherein at least a portion of said shell is formed by two adjacent folds facing in the same direction, wherein one of said folds near the distal end is connected to the other of said folds near the proximal end.

10. The liner according to claim 7, wherein at least a portion of the shell is formed by two adjacent folds facing in the same direction, wherein a distal end of one of the folds is connected to a support plate corresponding to the other fold.

11. The liner according to claim 8, wherein at least a portion of the casing is composed of two bent portions facing the same direction and a barrel disposed between the two bent portions without a reinforcing structure, a distal end of one of the bent portions is butted or overlapped with one end of the barrel without a reinforcing structure, and a proximal end of the other bent portion is butted or overlapped with the other end of the barrel without a reinforcing structure.

12. The liner according to claim 7, wherein at least a part of the shell is composed of two bent portions with the same orientation and a cylinder body without a reinforcing structure arranged between the two bent portions, the distal end of one bent portion is butted or overlapped with one end of the cylinder body without the reinforcing structure, and the support plate of the other bent portion is butted or overlapped with the other end of the cylinder body without the reinforcing structure.

13. The liner according to claim 9, wherein the bending parts are provided with transition sections at positions close to the support plates, and the distal end of one of the bending parts is connected with the transition section of the other bending part.

14. The liner according to claim 13, wherein the transition section is stepped and includes a first wall and a second wall, the first wall has a smaller angle with the predetermined direction than the second wall, and a distal end of one of the bends is connected to at least the first wall of the other bend.

15. The liner according to claim 7, wherein at least a portion of the shell is formed by two adjacent and differently oriented folds, the distal ends of the two folds or the proximal ends of the two folds abutting or overlapping.

16. The liner according to claim 7, wherein at least a portion of the shell is composed of two bent portions with different orientations and a cylindrical body disposed between the two bent portions and having no reinforcing structure, and the distal ends of the two bent portions or the proximal ends of the two bent portions are respectively butted or overlapped with the two ends of the cylindrical body having no reinforcing structure.

17. The liner of claim 6, wherein the support plate comprises any one or combination of: the arc-shaped plate is a flat-plate-shaped straight plate, deviates from the arc-shaped plate with the bending part protruding, and is close to the arc-shaped plate with the bending part recessed inwards.

18. The liner according to claim 1, wherein the shell further comprises a tubular body disposed between the two end caps, and the reinforcing structure comprises a support structure disposed at least partially within the tubular body and a bend connected to the support structure, at least a portion of the tubular body being formed by the bend.

19. The liner of claim 18, wherein at least a portion of the cartridge body is integrally formed with the end cap.

20. The liner according to claim 2, wherein the partial shell is formed by connecting the bent part with a cylinder body without a reinforcing structure.

21. The liner according to claim 1, wherein a surface projection of the support structure along the predetermined direction at least partially coincides with a projection of a cross-section of the shell perpendicular to the predetermined direction in the predetermined direction.

22. The bladder according to claim 1 wherein said shell has a major axis and a minor axis in a cross-section perpendicular to said predetermined direction.

23. The liner of claim 1, wherein the support structure is provided with a reinforcement.

24. The liner of claim 23, wherein the reinforcement includes a bead and/or a rib.

25. The liner according to claim 1, wherein the support structure is provided with a communication portion.

26. The liner according to claim 25, wherein the communication portion is provided with a bead at an edge.

27. The liner of claim 1, wherein said shell has an anode rod disposed thereon, said anode rod extending into said liner in said predetermined direction, said anode rod extending through at least one of said support structures.

28. The bladder according to claim 27 wherein at least a portion of said casing is constructed of stainless steel or carbon steel or plastic.

29. The liner according to claim 1, wherein the liner comprises at least one reinforcing structure, and when the number of the reinforcing structures is multiple, the distance between two adjacent reinforcing structures along the predetermined direction is between 50 mm and 250 mm.

30. The liner according to claim 1, wherein a cross-sectional profile shape of the shell in a direction perpendicular to the predetermined direction includes any one of: elliptical, quasi-elliptical.

31. The liner of claim 1, wherein the reinforcement structure includes at least one arcuate panel including a first portion disposed within the shell and a second portion configured to form at least a portion of the shell.

32. The bladder according to claim 31 wherein said second portion is connected to one of said end caps.

33. The liner of claim 32, wherein the arcuate panel defines an open end, and wherein the second portion is proximate the open end relative to the first portion.

34. The liner of claim 33, wherein the end caps have open ends, and the second portion is fixedly coupled to the open end of one of the end caps.

35. The liner of claim 33, wherein the liner includes at least two arcuate panels having open ends oriented in the same or different directions.

36. The liner according to claim 33, wherein at least a portion of the housing is formed by two adjacent curved plates having open ends facing the same direction, and the two adjacent curved plates are respectively a first curved plate and a second curved plate, wherein the open end of the first curved plate is connected to a predetermined position of the second curved plate, and the predetermined position is a boundary position of the first portion and the second portion of the second curved plate.

37. The liner of claim 33, wherein at least a portion of the shell is formed by two adjacent curved plates with different open ends facing each other, namely a first curved plate and a second curved plate, and the open ends of the first curved plate and the second curved plate are butted or overlapped.

38. A water heater including a liner as claimed in any one of claims 1 to 37.

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