Electric water heater with vertical and horizontal dual-purpose plastic inner container

Abstract

An electric water heater with a vertical and horizontal dual-purpose plastic inner container comprises the plastic inner container provided with a container opening, a water inlet pipe, a water outlet pipe, a flange plate and a heating pipe arranged on the flange plate in a penetrating mode, the water inlet pipe and the water outlet pipe extend inwards from the container opening along the inner wall of the plastic inner container, the water inlet pipe extends inwards by a certain distance, and the water outlet pipe extends inwards by a certain distance. The water outlet pipe extends inwards till a water inlet located in the tail end of the water outlet pipe is close to the bottom of the plastic inner container, and the water inlet pipe and the water outlet pipe are fixed to the inner wall of the plastic inner container through supporting pieces. Compared with the prior art, the technical scheme provided by the utility model has the advantages that the plastic inner container is used, so that the cost is reduced, air can be emptied, dry burning is avoided, the inner wall of the inner container is protected from being scratched, the structure of the flange plate is simplified, an electricity guard wall is prevented from being independently arranged, the weight is light, and the loading capacity is high.

Description

Technical Field

[0001] The utility model relates to a vertical and horizontal dual-purpose electric water heater, in particular to an vertical and horizontal dual-purpose electric water heater with a plastic inner tank. Background Art

[0002] At present, most of the vertical and horizontal electric water heaters on the market use enamel inner tanks that are highly corrosion-resistant and easy to clean. However, enamel inner tanks also have many problems such as high cost and easy porcelain explosion at the punching points. Especially in areas with poor water quality, the problem of porcelain explosion at the pipe mouth and water leakage due to perforation is more serious. Due to the characteristics of enamel inner tanks that porcelain is easy to explode and inconvenient to punch holes, the matching flanges are generally equipped with water inlet and outlet pipes, which further increases the overall cost of the flanges. In addition, vertical and horizontal electric water heaters also put forward higher requirements for the setting of water inlet and outlet pipes. It is necessary to evacuate the air in the inner tank as much as possible. Otherwise, dry burning or even burning of the machine is likely to occur, which seriously threatens personal safety.

[0003] For example, a Chinese invention application with application publication number CN104197510A, entitled "A ceiling-mounted concealed electric water heater", discloses: comprising an outer shell (1), an insulation layer (2), an inner tank (3), a heater (4), a water inlet pipe (5), a water outlet pipe (6), a magnesium rod (7) and a bracket (10), wherein the heater (4) is located between the water inlet pipe (5) and the water outlet pipe (6), the heater (4), the water inlet pipe (5), the water outlet pipe (6) and the magnesium rod (7) are respectively connected to the inner tank (3) from the side end of the inner tank (3), the water inlet pipe (5) is moved down to be horizontally arranged near the lower wall of the inner tank (3), the water outlet pipe (6) is moved up to be horizontally arranged near the upper wall of the inner tank (3), the pipe ends of the water inlet pipe (5) and the water outlet pipe (6) are sealed, a plurality of water inlet holes are evenly opened on the lower side of the pipe body of the water inlet pipe (5), and a plurality of water outlet holes are evenly opened on the upper side of the pipe body of the water outlet pipe (6). The length of the water outlet pipe (6) is determined according to the length of the inner liner (3), and the end of the water outlet pipe (6) is close to the end of the inner liner (3). The technical solution described in the invention application does not improve the inner liner material problem, and therefore cannot overcome the problems of inner liner perforation and leakage and high product cost. In addition, although the arrangement of the water inlet pipe (5) and the water outlet pipe (6) can achieve the effect of evacuating air, it cannot overcome the problem of the inner wall of the inner liner being scratched due to the vibration of the pipe body during water inlet and water outlet, which is easy to cause damage to the inner liner and accelerate the speed of perforation and leakage. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model discloses an electric water heater with a vertical or horizontal dual-purpose plastic liner which uses a plastic liner to reduce costs, ensures that air is exhausted to avoid dry burning, protects the inner wall of the liner from being scratched, simplifies the flange structure, avoids the need to set up a separate anti-electric wall, is light in weight, and has a high pressure-bearing capacity.

[0005] The main technical solutions adopted by the present utility model are as follows:

[0006] An electric water heater with a vertical and horizontal dual-purpose plastic inner liner, comprising a plastic inner liner with a liner opening, a water inlet pipe, a water outlet pipe, a flange, and a heating pipe passing through the flange. The water inlet pipe and the water outlet pipe extend inward along the inner wall of the plastic inner liner from the liner opening. The water inlet pipe extends inward for a certain distance, and the water outlet pipe extends inward until the water inlet at the end of the water outlet pipe is close to the bottom of the liner of the plastic inner liner. The water inlet pipe and the water outlet pipe are fixed on the inner wall of the plastic inner liner by a support member.

[0007] Wherein, the distance between the water inlet pipe and the water outlet pipe and the inner wall of the plastic inner liner is between 5 mm and 15 mm.

[0008] Wherein, the support member includes oppositely arranged clamping columns. The clamping column includes a mounting foot and a limiting head. The mounting foot is fixed on the inner wall of the plastic inner liner. The limiting head is formed with a limiting block protruding towards one side of the oppositely arranged clamping columns. The top end of the limiting head is formed with an inclined surface structure.

[0009] Wherein, the support member includes a mounting foot and a limiting head. The mounting foot is fixed on the inner wall of the plastic inner liner. The limiting head is bifurcated and extends towards both sides respectively into an arc-shaped structure.

[0010] Wherein, a circumferential edge of the liner opening is provided with an outwardly protruding annular boss. The water inlet pipe and the water outlet pipe pass through the annular boss. The flange is matched with the annular boss to seal the liner opening.

[0011] Wherein, the annular boss is integrally formed at the liner opening or the annular boss is welded at the liner opening. It further includes a reinforcing member embedded in the annular boss. The reinforcing member is integrally annular. The cross-section of the reinforcing member is in a shape or a "T" shape. The reinforcing member includes an outer ring wall, a connecting ring, and an inner ring wall. The outer ring wall abuts against the outer surface of the outer side wall of the annular boss. The inner ring wall of the reinforcing member is formed with an arc-shaped bend. The connecting ring is provided with a through hole for the water inlet pipe and the water outlet pipe to pass through. The connecting ring is further provided with a mounting hole for a fastener to pass through.

[0012] Wherein, the annular boss is connected to the circumferential edge of the bile port through a connecting member, and further includes a reinforcing member embedded in the annular boss. The cross-section of the annular boss has a stepped structure. The reinforcing member is integrally annular, and the cross-section of the reinforcing member is in a shape of "ㄅ". The reinforcing member includes a mounting ring, an outer ring wall, a connecting ring, and an inner ring wall. The outer ring wall abuts against the outer surface of the step surface of the stepped structure of the annular boss. An arc-shaped bend is formed on the inner ring wall of the reinforcing member. The connecting ring is provided with through holes for the water inlet pipe and the water outlet pipe to pass through, and the connecting ring is further provided with mounting holes for fasteners to pass through.

[0013] Wherein, it further includes a mounting member. The mounting member is integrally annular, and the cross-section of the mounting member is in a shape of "]" or "亅". The mounting member includes a pressing ring and a limiting foot. The pressing ring is provided with through holes for the water inlet pipe and the water outlet pipe to pass through, and the pressing ring is further provided with mating holes for fasteners to pass through. The limiting foot limits the flange disk that abuts against the inner ring side wall of the annular boss.

[0014] Wherein, it further includes a sealing member. The sealing member is arranged between the inner ring side wall of the annular boss and the disk edge of the flange disk.

[0015] Wherein, the plastic inner container includes an inner container base body, and the inner container base body is formed by splicing two mutually opposed base covers through single-seam circumferential welding.

[0016] Wherein, the plastic inner container further includes a fiber outer layer wrapping the inner container base body, and the fiber outer layer is formed by continuously winding a polyolefin fiber material impregnated with a resin adhesive.

[0017] Wherein, the number of the plastic inner containers is at least one.

[0018] Wherein, the number of the plastic inner containers is at least two. Adjacent two plastic inner containers are communicated through a connecting pipe in a shape of "し", and the water inlet pipe is inserted into one of the plastic inner containers, and the water outlet pipe is inserted into another plastic inner container.

[0019] According to the technical scheme described in the utility model, the following beneficial effects are achieved: the water inlet pipe and the water outlet pipe are arranged to extend inwardly along the inner wall of the plastic inner liner, which can ensure that the air can be emptied regardless of whether the plastic inner liner is arranged vertically or horizontally to prevent dry burning; the water inlet pipe and the water outlet pipe extending inwardly along the inner wall of the plastic inner liner are fixed to the inner wall of the plastic inner liner by a support member, which can prevent the water inlet pipe and the water outlet pipe from vibrating and scratching the inner wall of the inner liner when water is inletted or outletted; the use of a plastic inner liner can significantly reduce the cost and is lighter in weight, and the edge of the liner opening is provided with an annular boss protruding outward, which is beneficial to The protruding height of the annular boss forms an anti-leakage effect for the water inlet pipe and the water outlet pipe passing through it, avoiding the need to set up additional anti-electricity walls for the water inlet pipe and the water outlet pipe, further reducing the cost; the setting of the reinforcement not only enhances the mechanical strength of the annular boss, but also provides conditions for the reinforcement and the mounting part to be combined through fasteners; the mounting part limits the flange by limiting feet, and the structure is simple and stable; the plastic liner is spliced ​​with a base cover by single-seam ring welding, the base cover is easy to process and produce, the single-seam ring welding process is simple, and the production efficiency is significantly improved; the setting of the fiber outer layer further enhances the strength of the plastic liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the plastic liner of this application.

[0021] Figure 2 for Figure 1 Schematic diagram of the structural decomposition of the middle part.

[0022] Figure 3 It is a schematic diagram of the structure of a base cover with a bile opening and a water inlet pipe and a water outlet pipe passing through an annular boss.

[0023] Figure 4 for Figure 3 Enlarged view of the middle K section.

[0024] Figure 5 Another embodiment of the support member.

[0025] Figure 6 for Figure 1 Schematic diagram of the AA section structure.

[0026] Figure 7 for Figure 6 Enlarged view of part B in the middle.

[0027] Figure 8 Schematic diagram of the reinforcement structure.

[0028] Fig. 9 for Figure 8 Schematic diagram of the CC cross-section structure.

[0029] Fig.10FIG. 1 is a schematic diagram of the overall structure of a plastic liner in another embodiment.

[0030] Fig.11 for Fig.10 Schematic diagram of the EE cross-section structure.

[0031] Fig.12 for Fig.11 Enlarged view of part F in the middle.

[0032] Fig.13 It is a schematic diagram of the structure of an annular boss with a fastener through which a water outlet pipe is passed in another embodiment.

[0033] Fig.14 This is a schematic diagram of the installation structure.

[0034] Fig.15 for Fig.14 Schematic diagram of the DD section structure.

[0035] Fig.16 This is a schematic diagram of the structure of an electric water heater with two plastic tanks connected by a connecting pipe.

[0036] Fig.17 It is a schematic diagram of the cross-sectional structure of two plastic liners connected by a connecting pipe.

[0037] 1 plastic liner, 10 liner mouth, 101 mounting platform, M mounting seat, 11 annular boss, 125 base cover, 13 fiber outer layer, 2 water inlet pipe, 3 water outlet pipe, 30 support, 31 mounting foot, 32 limit head, 4 flange, 41 heating tube, 5 reinforcement, 50 through hole, 51 outer ring wall, 52 connecting ring, 53 inner ring wall, 54 mounting ring, 6 fastener, 6' connecting piece, 7 mounting piece, 70 through hole, 71 pressure ring, 72 limit foot, 8 sealing piece, 9 connecting pipe. DETAILED DESCRIPTION

[0038] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0039] See also Figure 2-4As shown in Figures 6, 11 and 17, an electric water heater with a vertical and horizontal dual-purpose plastic inner liner comprises a plastic inner liner 1 with a liner opening 10, a water inlet pipe 2, a water outlet pipe 3, a flange 4 and a heating pipe 41 passed through the flange 4, the water inlet pipe 2 and the water outlet pipe 3 extend inwardly from the liner opening 10 along the inner wall of the plastic inner liner 1, the water inlet pipe 2 extends inwardly for a distance, the water outlet pipe 3 extends inwardly until the water inlet located at the end of the water outlet pipe 3 is close to the bottom of the plastic inner liner 1, and the water inlet pipe 2 and the water outlet pipe 3 are fixed to the inner wall of the plastic inner liner 1 by a support member 30. In the present application, the water inlet pipe and the water outlet pipe are arranged to extend inwardly along the inner wall of the plastic liner, which can ensure that the air in the liner can be emptied regardless of whether the plastic liner is arranged vertically or horizontally to prevent dry burning. In addition, the water inlet pipe and the water outlet pipe extending inwardly along the inner wall of the plastic liner are fixed to the inner wall of the plastic liner by a support, which can prevent the water inlet pipe and the water outlet pipe from vibrating and scratching the inner wall of the liner when water is inlet or out. Moreover, the use of a plastic liner can significantly reduce the cost and is lighter in weight, avoiding the situation in the prior art where the enamel liner is prone to bursting, perforation and leakage. Preferably, the distance that the water inlet pipe 2 extends inward does not exceed the length of the base cover with the liner opening described below.

[0040] See also Figure 2-4 As shown in , 6, 11, and 17, the distance between the water inlet pipe 2 and the water outlet pipe 3 and the inner wall of the plastic liner 1 is between 5 mm and 15 mm. This structural design can ensure that the water inlet pipe and the water outlet pipe are as close to the inner wall of the plastic liner as possible, so as to exhaust the air in the plastic liner as much as possible, prevent dry burning or even burn the machine, and avoid endangering personal safety.

[0041] See also Figure 3 , 4 As shown, the support member 30 includes relatively arranged clamping columns, the clamping columns include mounting feet 31 and limiting heads 32, the mounting feet 31 are fixed on the inner wall of the plastic liner 1, the limiting heads 32 are formed with limiting blocks protruding toward one side of the relatively arranged clamping columns, and the top of the limiting heads 32 is formed with an inclined surface structure. This structural design is conducive to sliding the water inlet pipe or the water outlet pipe through the inclined surface structure of the limiting head into the limiting heads of the relatively arranged clamping columns, so as to form a clamping installation of the water inlet pipe and the water outlet pipe.

[0042] See also Figure 5 As shown, the support member 30 includes a mounting foot 31 and a stopper head 32. The mounting foot 31 is fixed on the inner wall of the plastic liner 1. The stopper head 32 forms a bifurcation and extends to both sides to form an arc-shaped structure. With this structural design, the water inlet pipe and the water outlet pipe can be clamped into the arc-shaped structure through the bifurcation arc-shaped structure extending to both sides formed by the stopper head. Preferably, the arc-shaped structure is formed with an inclined structure that facilitates the water inlet pipe and the water outlet pipe to slide in.

[0043] See also Figure 1 ,2 , 6-15, and 17, the circumferential edge of the bile opening 10 is provided with an annular boss 11 protruding outward, the water inlet pipe 2 and the water outlet pipe 3 are arranged on the annular boss 11, and the flange 4 cooperates with the annular boss 11 to block the bile opening 10. In the present application, a plastic liner is used to replace the enamel liner, which is not only lower in cost (the cost of the enamel liner is currently about 85.59 yuan), more resistant to acid and alkali corrosion, and easier to punch (thereby eliminating the need to use a structure in which the water inlet pipe and the water outlet pipe are also arranged on the flange, and the overall cost of the flange is lower, which is about 20 yuan lower than that of the flange with the water inlet pipe and the water outlet pipe), and the plastic liner that can be realized by simple injection molding and blow molding processes can be made thinner, lighter, and have a lower scrap rate. In addition, the plastic liner has a lower thermal conductivity and better thermal insulation performance, thereby reducing the use of thermal insulation materials. Preferably, the protruding height of the annular boss 11 is 2 cm to 15 cm, so that the water inlet pipe and the water outlet pipe passing therethrough have a better anti-leakage effect. Therefore, there is no need to separately set up anti-electricity walls on the water inlet pipe and the water outlet pipe, further reducing the cost (compared with products with separate anti-electricity walls, the cost can be reduced by at least 28 yuan). More preferably, the material of the annular boss 11 is consistent with the plastic inner liner 1 and is also made of plastic. Most preferably, the material of the water inlet pipe 2 and the water outlet pipe 3 is also made of plastic.

[0044] See also Figure 2 , 6 -9, the annular boss 11 is integrally formed at the gallbladder opening 10 or the annular boss 11 is welded at the gallbladder opening 10, and also includes a reinforcing member 5 embedded in the annular boss 11, the reinforcing member 5 is annular as a whole, and the cross section of the reinforcing member 5 is The reinforcing member 5 is in the shape of a "D" or "D" shape, and includes an outer annular wall 51, a connecting ring 52 and an inner annular wall 53. The outer annular wall 51 is attached to the outer surface of the outer annular side wall of the annular boss 11, and the inner annular wall 53 of the reinforcing member 5 is formed with an arc bend. The connecting ring 52 is provided with a through hole 50 for the water inlet pipe 2 and the water outlet pipe 3 to pass through, and the connecting ring 52 is also provided with a mounting hole for the fastener 6 to pass through. In the present application, the annular boss is arranged on the circumferential edge of the gallbladder opening by an integrated molding method or a welding method, and the production and processing methods are simple and convenient, which is convenient to improve production efficiency. In the present application, the reinforcing member is embedded in the annular boss to improve the mechanical strength of the annular boss, and the setting of the reinforcing member also provides conditions for the subsequent matching with the mounting member. Preferably, the outer edge of the connecting ring 52 is connected to the outer annular wall 51, and more preferably, the outer edge of the connecting ring 52 is vertically connected to the outer annular wall 51. Preferably, the inner edge of the connecting ring 52 is connected to the inner annular wall 53. More preferably, the arc bending angle of the inner annular wall 53 is not less than 90°. More preferably, the arc bending angle of the inner annular wall 53 is a U-shaped bend of 180°. Most preferably, the arc bending is pre-embedded in the annular boss 11 and close to the inner annular side wall of the annular boss 11, so that the annular boss 11 forms a radial pulling force, making the structures of various components near the gallbladder opening 10 more stable.

[0045] In another embodiment, see Figure 10-13 As shown, the annular boss 11 is connected to the circumferential edge of the bile opening 10 through a connector 6', and also includes a reinforcement member 5 embedded in the annular boss 11. The cross section of the annular boss 11 has a step-like structure. The reinforcement member is annular as a whole, and the cross section of the reinforcement member is "ㄅ" shaped. The reinforcement member 5 includes a mounting ring 54, an outer ring wall 51, a connecting ring 52 and an inner ring wall 53. The outer ring wall 51 is attached to the outer surface of the step-like structure step of the annular boss 11. The inner ring wall 53 of the reinforcement member 5 is formed with an arc surface bend. The connecting ring 52 is provided with a through hole 50 for the water inlet pipe 2 and the water outlet pipe 3 to pass through. The connecting ring 52 is also provided with a mounting hole for the fastener 6 to pass through. In the present application, the plastic liner and the annular boss can be produced separately, and then the annular boss can be installed to the circumferential edge of the bile opening through the connector. Preferably, the connector adopts a screw and a nut matched therewith. Preferably, a mounting platform 101 is formed on the circumferential edge of the gallbladder opening 10, and a mounting seat M is pre-embedded in the mounting platform 101. The mounting seat M is annular as a whole, and the cross section of the mounting seat M is The mounting seat M is provided with a through hole for the connecting member 6' to pass through. Preferably, the mounting platform 101 is integrally formed on the circumferential edge of the bile opening 10 or the mounting platform 101 is welded to the circumferential edge of the bile opening 10. In the present application, one end of the connecting member is passed through the mounting seat through the through hole and is pre-buried in the mounting seat together with the mounting seat, and the other end of the connecting member is connected to the mounting ring of the reinforcement.

[0046] See also Fig.14 , 15As shown, it further includes a mounting member 7. The mounting member 7 is integrally annular, and the cross-section of the mounting member 7 is in the shape of "]" or "亅". The mounting member 7 includes a pressing ring 71 and a limiting foot 72. The pressing ring 71 is provided with a through hole 70 for the water inlet pipe 2 and the water outlet pipe 3 to pass through, and the pressing ring 71 is also provided with a mating hole for the fastener 6 to pass through. The limiting foot 72 limits the flange 4 that abuts against the inner ring side wall of the annular boss 11. In this application, one end of the fastener is assembled in the mounting hole of the connecting ring and is embedded into the annular boss together, and the mating hole on the pressing ring passes through the other end of the fastener, so that the pressing ring is assembled to closely adhere to the top wall of the annular boss. Preferably, the fastener 6 is a screw and a nut that mates with it. After the mounting member 7 is installed in place, the nut is then tightened on the screw. Preferably, to enhance the mechanical strength of the mounting member, the mounting member is further provided with a rib structure extending along the surface of the pressing ring 71.

[0047] See Figure 2 、 7 、12 As shown, it further includes a sealing member 8. The sealing member 8 is arranged between the inner ring side wall of the annular boss 11 and the rim of the flange 4, and the sealing member 8 is in the shape of a conical cylinder. In this application, the sealing member serves to seal the gap between the inner ring side wall of the annular boss and the rim of the flange.

[0048] See Figure 2 、 17 As shown, the plastic inner liner 1 includes an inner liner matrix, and the inner liner matrix is formed by single-seam ring welding of two mutually mating matrix covers 125. In this application, using mutually mating matrix covers to form the inner liner matrix by single-seam ring welding can not only reduce the difficulty of the inner liner processing technology, is much faster than one-time integral production of the inner liner, has a lower scrap rate, but also single-seam ring welding is simpler, time-saving and labor-saving, and has a higher production efficiency. Preferably, the weld of the single-seam ring welding is located in the middle of the inner liner matrix.

[0049] See Figure 1 、 2 、6、16、17 As shown, the plastic inner liner 1 further includes a fiber outer layer 13 that wraps the inner liner matrix. The fiber outer layer 13 is formed by continuously winding a polyolefin fiber material impregnated with a resin adhesive. In this application, using a fiber outer layer to wrap the inner liner matrix can enhance the strength of the inner liner matrix, enabling the plastic inner liner to have a pressure-bearing capacity of more than 40 kilograms (twice that of existing products) and be able to reach more than 1 million times in the pulse test (four times that of existing products).

[0050] See Figure 1 、 16 As shown, the number of plastic inner liners 1 is at least one. In this application, according to the needs of the usage scenario, the plastic inner liner can be arranged in various positions such as vertical and horizontal.

[0051] See also Fig.16 , 17 As shown, the number of plastic inner liner 1 is at least two, and two adjacent plastic inner liner 1 are connected by a "し"-shaped connecting pipe 9, and the water inlet pipe 2 is inserted into one of the plastic inner liner 1, and the water outlet pipe 3 is inserted into the other plastic inner liner 1. In the present application, it is not limited to the case of using only one plastic inner liner. Under specific water storage requirements, at least two plastic inner liner can be connected by a connecting pipe. Preferably, the part of the connecting pipe 9 extending into the plastic inner liner 1 also extends along the inner wall of the plastic inner liner 1. Preferably, in the vertical and horizontal dual-purpose electric water heater product provided with at least two plastic inner liner, a control panel is also included. The control panel is arranged on the outer surface of the outer shell of the electric water heater product by magnetic attraction, and the magnetic attraction position of the control panel can be changed as needed.

[0052] Although the specific implementation modes of the present invention have been described above, those skilled in the art may modify the present invention without departing from the spirit and principle of the present invention. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electric water heater with a vertical and horizontal dual-purpose plastic liner, comprising a plastic liner with a liner opening, a water inlet pipe, a water outlet pipe, a flange and a heating pipe inserted on the flange, characterized in that: The inlet pipe and the outlet pipe extend inward along the inner wall of the plastic inner container from the mouth of the inner container. The inlet pipe extends inward for a certain distance, and the outlet pipe extends inward until the water inlet at the end of the outlet pipe is close to the bottom of the inner container of the plastic inner container. The inlet pipe and the outlet pipe are fixed on the inner wall of the plastic inner container by a support member.

2. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to claim 1, characterized in that: The distance between the inlet pipe and the outlet pipe and the inner wall of the plastic inner container is between 5 mm and 15 mm.

3. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to claim 1 or 2, characterized in that: The support member includes oppositely arranged clamping posts. The clamping posts include mounting feet and limiting heads. The mounting feet are fixed on the inner wall of the plastic inner container. The limiting heads are formed with limiting blocks protruding towards one side of the oppositely arranged clamping posts, and the top of the limiting heads is formed with an inclined surface structure.

4. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to claim 1 or 2, characterized in that: The support member includes a mounting foot and a limiting head. The mounting foot is fixed on the inner wall of the plastic inner container. The limiting head is bifurcated and extends towards both sides respectively into an arc-shaped structure.

5. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to claim 1 or 2, characterized in that: A circular convex platform protruding outward is arranged on the circumferential edge of the mouth of the inner container. The inlet pipe and the outlet pipe are arranged through the circular convex platform, and the flange is matched with the circular convex platform to seal the mouth of the inner container.

6. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to claim 5, characterized in that: The annular boss is integrally formed at the bile opening or the annular boss is welded to the bile opening, and further includes a reinforcing member embedded in the annular boss. The reinforcing member is integrally annular, and the cross-section of the reinforcing member is in a shape of or a "T" shape. The reinforcing member includes an outer ring wall, a connecting ring, and an inner ring wall. The outer ring wall abuts against the outer surface of the outer side wall of the annular boss. An arc-shaped bend is formed on the inner ring wall of the reinforcing member. The connecting ring is provided with a through hole for the water inlet pipe and the water outlet pipe to pass through, and the connecting ring is also provided with a mounting hole for a fastener to pass through.

7. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to claim 5, characterized in that: The circular convex platform is connected to the circumferential edge of the mouth of the inner container through a connecting member. It also includes a reinforcing member embedded in the circular convex platform. The cross-section of the circular convex platform has a stepped structure. The reinforcing member is integrally annular, and the cross-section of the reinforcing member is in a "ㄅ” shape. The reinforcing member includes a mounting ring, an outer ring wall, a connecting ring and an inner ring wall. The outer ring wall abuts against the outer surface of the step surface of the stepped structure of the circular convex platform. The inner ring wall of the reinforcing member is formed with an arc-shaped bend. The connecting ring is provided with a through hole for the inlet pipe and the outlet pipe to pass through, and the connecting ring is also provided with a mounting hole for a fastener to pass through.

8. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to claim 6 or 7, characterized in that: It also includes a mounting member. The mounting member is integrally annular, and the cross-section of the mounting member is in a "]” shape or a "亅” shape. The mounting member includes a pressing ring and a limiting foot. The pressing ring is provided with a through hole for the inlet pipe and the outlet pipe to pass through, and the pressing ring is also provided with a mating hole for the fastener to pass through. The limiting foot limits the flange abutting against the inner ring side wall of the circular convex platform.

9. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to claim 8, characterized in that: It also includes a sealing member. The sealing member is arranged between the inner ring side wall of the circular convex platform and the edge of the flange.

10. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to any one of claims 1, 2, 6, 7, and 9, characterized in that: The plastic inner container includes an inner container base body, and the inner container base body is formed by single-seam ring welding of two mutually butting base covers.

11. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to claim 10, characterized in that: The plastic inner container also includes a fiber outer layer wrapping the inner container base body. The fiber outer layer is formed by continuously winding a polyolefin fiber material impregnated with a resin adhesive.

12. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to any one of claims 1, 2, 6, 7, 9 and 11, characterized in that: The number of the plastic inner containers is at least one.

13. The electric water heater with a vertical and horizontal dual-purpose plastic liner according to claim 12, characterized in that: The number of the plastic inner containers is at least two. Adjacent two plastic inner containers are communicated through an "し”-shaped connecting pipe, and the inlet pipe is inserted into one of the plastic inner containers, and the outlet pipe is inserted into another plastic inner container.

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