Water heater

Abstract

The utility model belongs to the technical field of household appliances, and discloses a water heater which comprises a shell, a wire and a plugging piece, the wire is connected with a terminal plug, and the shell is provided with a threading hole allowing the terminal plug to penetrate through; the plugging member is used for plugging a gap between the threading hole and the wire. According to the water heater, the plugging piece is arranged, when a wire is installed, a terminal plug at the end of the wire is inserted into a threading hole and pulled into an electrical room by a proper length, then the plugging piece is plugged in the threading hole, sealing of the threading hole is completed, and the situation that gaps exist in the threading hole is avoided; the blocking piece can effectively prevent the foaming material from overflowing, electronic elements of the display panel are prevented from being damaged, and it is guaranteed that the heat preservation performance of the water heater is good.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a water heater. Background Art

[0002] Water heaters can be divided into four types according to their principles: electric water heaters, gas water heaters, solar water heaters, and air energy water heaters. Taking electric water heaters as an example, they include an outer shell and an inner tank arranged in the outer shell. The inner tank is made of metal and is used to store hot water. The outer shell is made of insulating material to prevent electric shock accidents. Foaming material is filled between the outer shell and the inner tank. When the foaming material is foamed, it will fill the space between the inner tank and the outer shell to keep the inner tank warm.

[0003] The outer shell is provided with a display panel and an anti-electric wall cover, and the anti-electric wall cover is provided on the back of the display panel to protect the electronic components on the back of the display panel. The wiring harness on the display panel needs to pass through the outer shell to be connected to the electrical room. Since the terminal connector size at the end of the wiring harness is larger than the wiring harness size, the size of the threading hole opened on the outer shell should allow the terminal connector to pass through. After threading, the gap between the wiring harness and the threading hole is large. When the foaming material is injected in the middle area between the outer shell and the inner liner for foaming, the foaming material will overflow along the threading hole on the outer shell and enter the space defined by the anti-electric wall cover and the back of the display panel. On the one hand, it is easy to damage the electronic components on the back of the display panel, and on the other hand, it will lead to a reduction in the foaming material between the outer shell and the inner liner, and reduce the thermal insulation performance.

[0004] Therefore, a new water heater is needed urgently to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a water heater, which can prevent the foaming material between the shell and the inner tank from overflowing from the threading hole of the shell, avoid the electronic components of the display panel from being damaged, and ensure the good thermal insulation performance of the water heater.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A water heater is provided, comprising:

[0008] A wire connected with a terminal plug;

[0009] The housing is provided with a threading hole for allowing the terminal plug to pass through;

[0010] The blocking piece is used to block the gap between the wire and the threading hole.

[0011] As a preferred solution of the water heater provided by the utility model, a wire fixing hole is provided on the blocking member, and the wire is sealed and passed through the wire fixing hole.

[0012] By setting up the plugging piece, when installing the wire, first insert the terminal plug into the threading hole, and after pulling it into the electrical room to a suitable length, seal the threading hole with the plugging piece to complete the sealing of the threading hole. Since the wire is in sealed contact with the fixed wire hole of the plugging piece, and the plugging piece can be sealed at the threading hole, it can avoid the existence of gaps at the threading hole. When the foaming material is injected between the outer shell and the inner tank for foaming, the plugging piece can effectively prevent the foaming material from overflowing, avoid the electronic components of the display panel from being damaged, and ensure the good thermal insulation performance of the water heater.

[0013] As a preferred solution of the water heater provided by the utility model, the blocking member is sealingly penetrated through the threading hole;

[0014] Alternatively, the blocking member is arranged outside the shell and is sealed to the outer wall of the shell.

[0015] As a preferred solution of the water heater provided by the utility model, the sealing member includes an outer fitting portion, a penetration portion and an inner clamping portion which are connected in sequence; the penetration portion is penetrated through the threading hole, the inner clamping portion is sealed and fitted to the inner wall of the outer shell, and the outer fitting portion is sealed and fitted to the outer wall of the outer shell.

[0016] As a preferred solution of the water heater provided by the utility model, a guiding slope is provided on the outer periphery of the inner clamping portion, and the guiding slope gradually inclines toward the center line of the threading hole in a direction away from the threading portion.

[0017] As a preferred solution of the water heater provided by the utility model, the fixing hole ends at a side of the penetration portion facing away from the outer fitting portion, the inner clamping portion is arranged outside the fixing hole, and a cavity is formed with the penetration portion, and the cavity is communicated with the fixing hole;

[0018] Alternatively, the inner clamping portion is a boss structure, and the wire fixing hole extends to a side of the inner clamping portion facing away from the outer fitting portion;

[0019] Alternatively, the inner clamping portion includes a plurality of undercut hooks, and the plurality of undercut hooks are arranged at intervals along the circumference of the penetration portion.

[0020] As a preferred solution of the water heater provided by the utility model, the cross-section of the penetration portion and the cross-section of the threading hole are both non-circular.

[0021] As a preferred solution of the water heater provided by the utility model, a plug is sealably penetrated in the wire fixing hole, and the plug sealing sleeve is arranged on the wire.

[0022] As a preferred solution of the water heater provided by the utility model, the plug includes a connected sealing tube and a stop flange, the wire is sealed and passed through the sealing tube, the sealing tube is sealed and passed through the wire fixing hole, and the stop flange is sealed and fitted to the outer wall of the sealing piece.

[0023] As a preferred solution of the water heater provided by the utility model, a guide tip is provided at one end of the sealing cylinder away from the stop flange.

[0024] As a preferred solution of the water heater provided by the utility model, a plurality of the wires are provided, a plurality of wire fixing holes which are not interconnected are provided on the blocking member, and the plurality of the wires are arranged in the plurality of wire fixing holes in a one-to-one correspondence.

[0025] As a preferred solution of the water heater provided by the utility model, the material of the blocking piece is rubber or plastic;

[0026] Alternatively, the blocking member includes a sealant structure.

[0027] Beneficial effects of the utility model:

[0028] The utility model provides a water heater, wherein both ends of the wire are provided with terminal plugs, wherein the terminal plug at one end is electrically connected to a display panel provided outside the shell, and the terminal plug at the other end needs to pass through a threading hole on the shell and enter the electrical chamber to be electrically connected with a corresponding electronic component in the electrical chamber. Since the size of the terminal plug is larger than the size of the wire, there is a large gap between the threading hole and the wire after the wire is connected. The water heater is provided with a plugging piece, and when installing the wire, the terminal plug is first inserted into the threading hole, and after being pulled into the electrical chamber to a suitable length, the plugging piece is plugged at the remaining gap between the threading hole and the wire to complete the sealing at the threading hole. When the foaming material is injected between the shell and the inner tank for foaming, the plugging piece can effectively prevent the foaming material from overflowing, thereby preventing the electronic components of the display panel from being damaged, and ensuring good thermal insulation performance of the water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an overall view of the water heater provided by the specific embodiment of the utility model;

[0030] Figure 2 This is a first partial view of the water heater provided by the specific embodiment of the utility model (without the plugging member installed);

[0031] Figure 3 It is a second partial view of the water heater provided by the specific embodiment of the utility model (after the plugging member is installed);

[0032] Figure 4 It is a cross-sectional view of the blocking member provided by the specific embodiment of the utility model after being installed on the housing;

[0033] Figure 5 This is a first view of the blocking member provided by the specific embodiment of the utility model;

[0034] Figure 6 This is a second view of the blocking member provided in the specific embodiment of the utility model;

[0035] Figure 7 It is a third view of the blocking member provided in the specific implementation manner of the utility model.

[0036] In the figure:

[0037] 1. Shell; 2. Wire; 3. Blocking piece; 4. Electrical room; 5. Display panel; 6. Anti-electric wall cover;

[0038] 11. Threading hole; 21. Terminal plug;

[0039] 31. Wire fixing hole; 32. External fitting part; 33. Insertion part; 34. Internal clamping part;

[0040] 321, first inverted arc structure;

[0041] 341. Guide slope; 342. Cavity; 343. Second inverted arc structure. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] Embodiment 1

[0047] like Figure 1 and Figure 2 As shown, this embodiment provides a water heater, which includes a shell 1 and an inner tank arranged in the shell 1, and the inner tank is used to store hot water. An electrical chamber 4 is defined between a support plate for fixing the end of the inner tank and the inner wall of the shell 1, and is used to centrally arrange the electronic components in the water heater. A display panel 5 and an anti-electrical wall cover 6 are arranged outside the shell 1, and the anti-electrical wall cover 6 is arranged on the back of the display panel 5 to protect the electronic components on the back of the display panel 5.

[0048] The display panel 5 is connected with a wire 2, and the wire 2 needs to pass through the housing 1 to be connected to the electrical room 4, so a wire threading hole 11 needs to be opened on the housing 1. Specifically, terminal plugs 21 are provided at both ends of the wire 2, wherein the terminal plug 21 at one end is electrically connected to the display panel 5 disposed outside the housing 1, and the terminal plug 21 at the other end needs to pass through the wire threading hole 11 on the housing 1 and enter the electrical room 4, so as to be electrically connected with the corresponding electronic component in the electrical room 4.

[0049] Since the size of the terminal plug 21 is larger than that of the wire 2, the size of the threading hole 11 opened on the shell 1 should allow the terminal plug 21 to pass through, that is, the cross-sectional size of the threading hole 11 is larger than the cross-sectional size of the terminal plug 21, and the cross-sectional size of the terminal plug 21 is larger than the cross-sectional size of the wire 2. In the prior art, after the wire 2 is plugged in, there is a large gap between the threading hole 11 and the wire 2. When the foaming material is injected into the middle area between the shell 1 and the inner liner for foaming, the foaming material will overflow along the threading hole 11 on the shell 1 and enter the space defined by the anti-electric wall cover 6 and the back of the display board 5. On the one hand, it is easy to damage the electronic components on the back of the display board 5, and on the other hand, it will lead to a reduction in the foaming material between the shell 1 and the inner liner, and reduce the thermal insulation performance.

[0050] Based on the above problems, this embodiment provides a water heater, which also includes a blocking member 3 for blocking the gap between the fixed wire 11 and the conductor 2. Specifically, during the manufacturing process of the conductor 2, the blocking member 3 is arranged on the conductor 2. Figure 5 As shown, a wire fixing hole 31 is provided on the blocking member 3, and the wire 2 is sealed and passed through the wire fixing hole 31. Specifically, the wire 2 without the terminal plug 21 is first passed into the wire fixing hole 31 of the blocking member 3, and then the terminal plugs 21 at both ends are welded. After the terminal plugs 21 are welded at both ends, the entire wire 2 is formed.

[0051] Specifically, when the wire 2 is connected between the electrical room 4 and the display panel 5, the terminal plug 21 at one end of the wire 2 is first plugged into the corresponding part of the back of the display panel 5, and then the terminal plug 21 at the other end is inserted into the threading hole 11, and after being pulled into the electrical room 4 to a suitable length, the blocking member 3 is blocked at the threading hole 11 to complete the sealing of the threading hole 11. Figure 3 Status shown.

[0052] Since the wire 2 is in sealed contact with the wire fixing hole 31 of the sealing member 3, and the sealing member 3 can be sealed at the threading hole 11, it is possible to avoid gaps at the threading hole 11. When the foaming material is injected between the outer shell 1 and the inner tank for foaming, the sealing member 3 can effectively prevent the foaming material from overflowing, thereby preventing the electronic components of the display panel 5 from being damaged, and ensuring that the thermal insulation performance of the water heater is good.

[0053] In this embodiment, the diameter of the wire fixing hole 31 is not larger than the diameter of the wire 2 , so as to ensure the sealing of the wire 2 at the wire fixing hole 31 .

[0054] Optionally, in this embodiment, see Figure 4 The blocking member 3 is sealingly penetrated through the threading hole 11 to firmly block the entire threading hole 11 .

[0055] Specifically, Figure 5 , Figure 6 as well as Figure 7As shown, the plugging member 3 includes an outer fitting portion 32, a penetration portion 33 and an inner clamping portion 34 which are connected in sequence. The penetration portion 33 is penetrated in the threading hole 11, the inner clamping portion 34 is sealed against the inner wall of the housing 1, and the outer fitting portion 32 is sealed against the outer wall of the housing 1. That is, the outer peripheral wall of the penetration portion 33 is recessed relative to the inner clamping portion 34 and the outer fitting portion 32, so that the outer peripheral wall of the penetration portion 33, the inner clamping portion 34 and the outer fitting portion 32 are surrounded to form a slot structure, which is engaged with the edge of the hole opening of the threading hole 11, ensuring that the plugging member 3 is stably and firmly connected at the threading hole 11 and will not fall out easily.

[0056] Furthermore, the side surface of the outer fitting portion 32 facing the inner clamping portion 34 is an arc-shaped surface, and the curvature of the arc-shaped surface is just matched with the outer wall of the housing 1, so as to ensure that the outer fitting portion 32 is sealed and seamlessly fitted with the outer wall of the housing 1. The side surface of the inner clamping portion 34 facing the outer fitting portion 32 is an arc-shaped surface, and the curvature of the arc-shaped surface is just matched with the inner wall surface of the housing 1, so as to ensure that the inner clamping portion 34 is sealed and seamlessly fitted with the inner wall of the housing 1, and ensure the sealing performance of the plugging member 3 after being installed at the threading hole 11.

[0057] See also Figure 4 and Figure 7 A guiding slope 341 is provided on the outer periphery of the inner clamping portion 34, and the guiding slope 341 gradually inclines toward the center line of the threading hole 11 along the direction away from the penetration portion 33, so that the cross-sectional size of the inner clamping portion 34 gradually decreases along the direction away from the outer fitting portion 32, so that the inner clamping portion 34 can pass through the threading hole 11 more easily, complete the clamping at the threading hole 11, and improve the installation convenience.

[0058] See also Figure 7 A first inverted arc structure 321 is provided on the outer edge of the outer fitting portion 32 facing away from the inner clamping portion 34, and a second inverted arc structure 343 is provided on the outer edge of the inner clamping portion 34 facing away from the outer fitting portion 32, so that the appearance quality is better.

[0059] As a first possible solution, see Figure 6 , the wire fixing hole 31 ends at the side of the penetration part 33 facing away from the external fitting part 32, the inner clamping part 34 is arranged outside the wire fixing hole 31, and surrounds a cavity 342 with the penetration part 33, and the cavity 342 is connected with the wire fixing hole 31. That is, the inner clamping part 34 is an annular buckle structure, which can save material usage and reduce production costs while ensuring the strength of the entire sealing member 3 and a firm clamping with the threading hole 11. Furthermore, when the foaming material between the outer shell 1 and the inner tank is foamed, the foaming material is not squeezed into the above-mentioned cavity 342, which can improve the thermal insulation performance of the threading hole 11. Moreover, the foaming material in the cavity 342 can squeeze the cavity wall of the cavity 342, so that the inner clamping part 34 is more closely attached to the inner wall of the threading hole 11, and the sealing member 3 and the threading hole 11 can be more firmly clamped during the foaming process.

[0060] As a second feasible solution, the inner clamping part 34 is a boss structure, and the fixing hole 31 extends to the side of the inner clamping part 34 facing away from the outer fitting part 32. That is, the inner clamping part 34 no longer encloses a cavity 342, and the middle part is a solid structure, which can improve the strength of the entire blocking member 3 and reduce the deformation of the blocking member 3.

[0061] As a third feasible solution, the inner clamping portion 34 includes a plurality of undercut hooks, which are arranged at intervals along the circumference of the penetration portion 33. The technical solution of arranging a plurality of undercut hooks at intervals can further reduce the amount of material used and ensure that they are firmly hooked with the threading hole 11. The number and distribution of the undercut hooks can be satisfied as long as the blocking member 3 does not fall out of the threading hole 11 during foaming.

[0062] Further, the cross-section of the penetration portion 33 and the cross-section of the threading hole 11 are both non-circular to prevent the penetration portion 33 from rotating in the threading hole 11. For example, in this embodiment, the cross-section of the penetration portion 33 and the cross-section of the threading hole 11 are both waist-shaped.

[0063] In this embodiment, only one wire 2 needs to be passed through the wire threading hole 11, and only one wire fixing hole 31 is provided on the blocking member 3. In other embodiments, if multiple wires 2 need to be passed through the position of the wire threading hole 11, multiple wire fixing holes 31 need to be provided on the blocking member 3, and the multiple wires 2 are sealed and passed through the multiple wire fixing holes 31 one by one. Furthermore, the multiple wire fixing holes 31 are not connected to each other to avoid gaps between the multiple wires 2.

[0064] Optionally, the blocking member 3 is an integrally formed member, which is easy to manufacture and does not require subsequent assembly and connection processes, and can ensure the strength of the blocking member 3. Furthermore, the material of the integrally formed blocking member 3 can be rubber or plastic, and the penetration portion 33, the inner clamping portion 34 and the outer fitting portion 32 are formed by extrusion or injection molding.

[0065] In another optional embodiment, the blocking member 3 is a split molded member. For example, the inner clamping portion 34 and the penetration portion 33 are made into one piece to form a first component, and the outer fitting portion 32 is a second component. The first component and the second component can be bonded into one piece later. The materials of the first component and the second component can both be rubber or plastic. Of course, one of the first component and the second component can also be set to a rubber material and the other to a plastic material.

[0066] Embodiment 2

[0067] This embodiment provides a water heater, which is different from the first embodiment in that:

[0068] The blocking member 3 provided in this embodiment is arranged outside the housing 1 and is sealed to the outer wall of the housing 1. For example, the outer edge of the blocking member 3 is bonded to the outer edge of the threading hole 11, which can also achieve the blocking of the threading hole 11. In this case, the area of ​​the blocking member 3 can be set larger to ensure that the outer edge of the threading hole 11 has a sufficiently large bonding area, so as to ensure that the blocking member 3 is firmly installed.

[0069] Embodiment 3

[0070] This embodiment provides a water heater, which is further improved on the basis of the first and second embodiments.

[0071] In this embodiment, a plug is sealed and penetrated in the wire fixing hole 31, and the plug is sealed and sleeved on the wire 2. After the plugging member 3 is installed at the position of the threading hole 11, the plug sleeved on the wire 2 is penetrated in the wire fixing hole 31, so that the inside and outside of the plug are respectively pressed against the hole wall of the wire fixing hole 31 and the wire 2, further improving the sealing of the wire 2 in the wire fixing hole 31.

[0072] Exemplarily, the plug includes a connected sealing cylinder and a stop flange, and the stop flange is arranged along the circumference of the sealing cylinder. The wire 2 is sealed and penetrated in the sealing cylinder, and the sealing cylinder is sealed and penetrated in the wire fixing hole 31. The stop flange is sealed and attached to the outer wall of the plugging member 3, further improving the sealing of the wire 2 in the wire fixing hole 31, and preventing the foaming material from leaking from the gap between the wire fixing hole 31 and the wire 2.

[0073] Furthermore, a guide tip is provided at one end of the sealing cylinder away from the stop flange, and the guide tip guides the sealing cylinder to enter the wire fixing hole 31 , so that the plug is easier to insert into the wire fixing hole 31 .

[0074] Embodiment 4

[0075] Based on the same inventive concept as the above embodiment, this embodiment provides a water heater, which is different from the above embodiment in that:

[0076] The sealing member 3 includes a sealant structure. After the wire 2 is inserted, the sealant is filled in the gap between the wire 2 and the threading hole 11. After the sealant solidifies and hardens, the gap can be firmly sealed to prevent the foaming material from overflowing.

[0077] The sealant is exemplarily an epoxy resin sealant, and of course it can also be other types of sealants, as long as it can prevent the foaming material from overflowing after solidification.

[0078] In this embodiment, since the sealant structure is formed after the later gluing, there is no need to add a process in the wire manufacturing stage, and there is no need to adjust the original water heater production line, which reduces the cost.

[0079] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Water heater, It is characterized in that include: A wire (2) connected to a terminal plug (21); The housing (1) is provided with a threading hole (11) for allowing the terminal plug (21) to pass through; A blocking member (3) is used to block the gap between the wire (2) and the wire threading hole (11).

2. The water heater according to claim 1, It is characterized in that The blocking member (3) is provided with a wire fixing hole (31), and the wire (2) is sealed and passed through the wire fixing hole (31).

3. The water heater according to claim 2, It is characterized in that The blocking member (3) is sealingly penetrated through the threading hole (11); Alternatively, the blocking member (3) is arranged outside the housing (1) and is sealed to the outer wall of the housing (1).

4. The water heater according to claim 3, It is characterized in that The blocking member (3) comprises an outer fitting portion (32), a penetration portion (33) and an inner clamping portion (34) which are connected in sequence; the penetration portion (33) is penetrated through the threading hole (11), the inner clamping portion (34) is sealed and fitted to the inner wall of the outer shell (1), and the outer fitting portion (32) is sealed and fitted to the outer wall of the outer shell (1).

5. The water heater according to claim 4, It is characterized in that A guiding inclined surface (341) is provided on the outer periphery of the inner clamping portion (34), and the guiding inclined surface (341) gradually inclines toward the center line of the threading hole (11) in a direction away from the threading portion (33).

6. The water heater according to claim 4, It is characterized in that The wire fixing hole (31) ends at a side of the penetration portion (33) facing away from the outer fitting portion (32); the inner clamping portion (34) is arranged outside the wire fixing hole (31) and forms a cavity (342) with the penetration portion (33); the cavity (342) is communicated with the wire fixing hole (31); Alternatively, the inner clamping portion (34) is a boss structure, and the wire fixing hole (31) extends to a side of the inner clamping portion (34) facing away from the outer fitting portion (32); Alternatively, the inner clamping portion (34) comprises a plurality of undercut hooks, and the plurality of undercut hooks are arranged at intervals along the circumference of the penetration portion (33).

7. The water heater according to claim 4, It is characterized in that The cross-section of the penetration portion (33) and the cross-section of the threading hole (11) are both non-circular.

8. The water heater according to any one of claims 2 to 7, It is characterized in that A plug is sealed and penetrated in the wire fixing hole (31), and the plug is sealed and sleeved on the wire (2).

9. The water heater according to claim 8, It is characterized in that The plug comprises a connected sealing cylinder and a stop flange, the wire (2) is sealed and inserted into the sealing cylinder, the sealing cylinder is sealed and inserted into the wire fixing hole (31), and the stop flange is sealed and fitted to the outer wall of the sealing member (3).

10. The water heater according to claim 9, It is characterized in that A guide tip is arranged at one end of the sealing sleeve away from the stop flange.

11. The water heater according to any one of claims 2 to 7, It is characterized in that A plurality of the conductive wires (2) are provided, and a plurality of mutually unconnected conductive wire fixing holes (31) are provided on the blocking member (3), and the plurality of conductive wires (2) are arranged in a one-to-one correspondence in the plurality of conductive wire fixing holes (31).

12. The water heater according to any one of claims 1 to 7, It is characterized in that The material of the blocking member (3) is rubber or plastic; Alternatively, the blocking member (3) comprises a sealant structure.

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