Waterproof shell and water heater comprising same

Abstract

The waterproof shell comprises a box body and a cover body, the box body comprises a box top plate, the cover body comprises a cover top plate, the cover top plate covers at least part of the box top plate, and the box top plate and the cover top plate are connected through a connecting part; the box top plate is provided with a protruding part, the protruding part protrudes towards the cover top plate and abuts against the cover top plate, and the protruding part extends around the connecting part. The edge of the cover top plate is provided with a flange, and the flange is bent towards the box top plate and abuts against the box top plate. According to the scheme, water is prevented from entering along a gap of a connecting part of the tank top plate and the cover top plate and flowing into the shell through the convex part propped against the cover top plate; the flange is arranged on the edge of the cover top plate, is bent towards the box top plate and abuts against the box top plate, so that an adjacent gap between the edge of the cover top plate and the edge of the box top plate is protected, water is prevented from flowing in, sealing is achieved through a mechanical structure, the structure is simple, assembling is convenient, and the waterproof effect that the water heater shell structure is sealed in the repeated disassembling and assembling process can be kept.

Description

Technical Field

[0001] This utility model relates to the field of hot water equipment, and in particular to a waterproof housing and a water heater including the same. Background Technology

[0002] With modern families pursuing a higher quality of life, water heaters have become an indispensable household appliance. However, the waterproof performance of water heaters is crucial during use. According to relevant waterproof standards, water heaters must undergo a spray test at 15° angles in all directions (left, right, front, and back) to ensure that water does not drip onto live components after entering, thus guaranteeing user safety.

[0003] However, there are certain assembly gaps between the water heater's tank and the front panel. These gaps can allow water to seep into the water heater, posing a potential safety risk to internal electrical components. To address this issue, the industry standard is to apply sealing strips to these gaps to prevent water ingress. While this method improves the water heater's waterproofing to some extent, it has drawbacks. First, applying sealing strips requires an additional step on the production line, increasing production costs and potentially reducing efficiency. Second, the sealing strips are prone to deformation during the reassembly and disassembly of the water heater, leading to a decrease in sealing performance and affecting the water heater's safety and lifespan. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the existing water heater shell, such as poor waterproof performance, cumbersome assembly process, and easy failure of seal after repeated disassembly and assembly, and to provide a waterproof shell and a water heater including the same.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A waterproof housing includes a box body and a cover body. The box body includes a top plate, and the cover body includes a top plate. The top plate covers at least a portion of the top plate, and the top plate and the top plate are connected by a connecting portion.

[0007] The top plate of the box is provided with a protrusion that protrudes towards and abuts against the top plate, and the protrusion extends around the connecting part; the edge of the top plate is provided with a flange that bends towards and abuts against the top plate.

[0008] In this design, a mating structure consisting of a top plate, a cover plate, and a protrusion is used. After the top plate and cover plate are assembled and fixedly connected by a connecting part, the protrusion abuts against the cover plate, preventing water from entering the outer shell through the gap at the connection between the top plate and the cover plate. By setting a flange on the edge of the cover plate, which bends towards the top plate and abuts against it, the adjacent gap between the edges of the cover plate and the top plate is protected, preventing water from flowing in. The sealing is achieved through a mechanical structure. The structure is simple, easy to assemble, and maintains its waterproof sealing function during repeated disassembly and assembly.

[0009] Preferably, the connecting portion includes a boss, a receiving cover, and a fastener. The boss is disposed on the top plate of the housing and protrudes outward in a direction away from the interior of the housing. The receiving cover is disposed on the top plate of the cover and protrudes outward in a direction away from the interior of the housing. The receiving cover is configured to cooperate with the boss to accommodate the boss. The fastener passes through the receiving cover and the boss and secures the receiving cover to the boss.

[0010] In this design, a boss is provided on the top plate of the enclosure, and a receiving cover is provided on the top plate. The boss and the receiving cover are fixedly connected, and the top plate and the top plate are fixedly connected by a connecting part. This avoids the use of an open gap structure in the connecting part, thus improving the waterproof performance. After the top plate and the top plate are welded and fixed, fasteners are used to penetrate the receiving cover and the boss located in the receiving cover to achieve a tight fit. This allows the top plate and the top plate to abut against each other, and the protrusion on the top plate abuts and presses against the top plate. This prevents water from flowing into the outer shell along the gap between the top plate and the top plate, thus improving the waterproof performance.

[0011] Preferably, the receiving cover has an opening for the boss to enter, the opening facing the rear side of the housing, and the top plate of the cover has flanges on all edges except for the receiving cover.

[0012] In this design, the receiving cover has an opening for the protrusion to enter, which serves as a guide during assembly. The opening extends from the receiving cover toward the rear of the housing and forms a semi-open structure with the rear end of the receiving cover, extending to the edge of the top plate. After the operator places the top plate under the top plate along the opening direction, the protrusion of the top plate enters the receiving part of the top plate through the opening. The protrusion abuts against the front of the receiving cover and reaches the assembly position, thus facilitating assembly.

[0013] Preferably, the protrusion starts from the rear edge of the top plate of the box, extends continuously around the boss, and extends to the rear edge of the top plate of the box, forming a U-shaped protrusion with the opening direction facing the rear side of the box and surrounding the boss.

[0014] In this design, by continuously arranging and extending the protrusions around the boss to form a U-shaped protrusion, a waterproof structure is formed around the boss, that is, around the connection between the top plate and the cover plate. The connection is surrounded by bosses to block water from flowing in, thereby increasing the waterproof performance of the shell and preventing water from flowing into the shell through the gaps.

[0015] Preferably, both the boss and the receiving cover are provided with inclined surfaces, which are arranged facing the front side of the housing. The receiving cover and the corresponding positions of the inclined surfaces of the boss are provided with through holes, and the fasteners are inserted through the through holes.

[0016] In this solution, on the one hand, by setting an inclined plane, the fasteners are made to pass through the inclined plane, which is more convenient for installing the fasteners and performing the tightening operation than passing through the horizontal plane; on the other hand, since the rear side of the enclosure is usually close to the wall where the enclosure is installed during the installation and assembly process, by making the inclined plane face the front side of the enclosure, the fastener assembly faces the same side as the installation operator, which makes it easier to leave more space for the installation of the enclosure and the operation of passing through the fasteners.

[0017] Preferably, the boss is a triangular structure protruding from the surface of the top plate of the box, and the receiving cover is a trapezoidal structure protruding from the surface of the top plate of the cover.

[0018] In this design, the boss protrudes outward from the top plate of the box to form a triangular structure, and the cover protrudes outward from the top plate of the cover to form a trapezoidal structure. Both have inclined surfaces for fasteners to be inserted. The triangular structure is stable under stress, and the projection of the trapezoidal structure of the cover onto the top plate of the box covers the triangular structure of the boss, reducing the direct impact of water flow on the boss and blocking the water flow outside the cover, thus increasing waterproof performance.

[0019] Preferably, the top plate of the box has a pipe connection port in the center and a groove in the top plate. The groove starts from the rear edge of the top plate, extends continuously around the pipe connection port, and extends to the rear edge of the top plate, forming a U-shaped groove with the opening facing the rear side of the box and surrounding the pipe connection port; the groove is for the corresponding flange to be inserted.

[0020] In this solution, a groove is provided on the top plate of the enclosure for the corresponding flange to be embedded. The flange is embedded and pressed into the groove, forming a mating structure between the flange and the groove, which serves to block water and prevent water from flowing in through the gap between the flange and the top plate. The water-blocking structure formed by the groove and flange and the water-blocking structure formed by the protrusion and the top plate work together to achieve multi-layer water blocking to improve waterproof performance.

[0021] Preferably, there are two connecting parts, which are symmetrically distributed on both sides of the pipe connection port.

[0022] Preferably, along the rear side of the box to the front side of the box, the top plate and the cover plate are inclined inward at both ends along the length of the box.

[0023] In this design, by tilting the top and bottom ends of the box panel and cover panel inward along the length of the box, the length of the top and cover panels gradually decreases on the same side, so that the corners of the top and cover panels form a certain angle instead of a right angle. Since the top angle of the cover is a right angle, if the top and bottom structures of the box are also right angles, it will cause assembly difficulties. Therefore, the corners of the top and cover panels are designed to have a certain angle, which makes assembly easier and avoids the situation where the contact edges of the box and cover are all right angles, thereby reducing the precision requirements during assembly on the production line and facilitating assembly.

[0024] Preferably, the tilt angle of both the top plate and the cover plate is in the range of 5° to 10°.

[0025] Preferably, the cover body includes a cover shell, which is pressed against the top cover plate.

[0026] A water heater comprising a waterproof housing as described above.

[0027] The positive and progressive effects of this utility model are as follows: By setting a matching structure of a top plate, a cover plate, and a protrusion, the top plate and the cover plate are assembled and fixedly connected by a connecting part. The protrusion abuts against the cover plate, preventing water from entering the outer shell through the gap at the connection between the top plate and the cover plate. By setting a flange on the edge of the cover plate, the flange bends towards the top plate and abuts against the top plate, thereby protecting the adjacent gap between the edge of the cover plate and the edge of the top plate and preventing water from flowing in. The sealing is achieved through a mechanical structure. The structure is simple, easy to assemble, and can maintain the waterproof function of the structure during repeated disassembly and assembly. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the waterproof outer shell and the top plate of the box of this utility model.

[0029] Figure 2 This is an exploded view of the housing and cover of the waterproof outer shell of this utility model.

[0030] Figure 3 This is a schematic diagram of the assembled structure of the waterproof outer shell of this utility model.

[0031] Figure 4 This is a front-angle sectional view of the waterproof outer shell of this utility model.

[0032] Figure 5 for Figure 4 A magnified schematic diagram of the local structure at point C.

[0033] Figure 6 This is a top view structural diagram of the top plate of the waterproof outer shell of this utility model.

[0034] Figure 7 This is a top view of the waterproof outer shell of this utility model from another structural angle.

[0035] Explanation of reference numerals in the attached figures:

[0036] Box 1

[0037] Box top plate 10

[0038] Box body 15

[0039] Protrusion 11

[0040] Groove 12

[0041] Cover 2

[0042] Top panel 20

[0043] Flip 21

[0044] 22 outer casing

[0045] Connecting part 3

[0046] 13 convex surfaces

[0047] Containment cover 23

[0048] Opening 230

[0049] First inclined plane 131

[0050] Second slope 231

[0051] Through hole 4

[0052] Pipe connection port 5

[0053] Rear edge 100

[0054] Corner 6

[0055] Front A

[0056] Rear B Detailed Implementation

[0057] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments, but the present invention is not limited to the scope of the embodiments thereon.

[0058] like Figures 1-7As shown, this embodiment provides a waterproof housing, which includes a box body 1 and a cover body 2. The box body 1 includes a top plate 10 and a body 15, and the cover body 2 includes a top cover plate 20 and a cover shell 22, with the cover shell 22 pressed against the top cover plate 20. The box body 1 and the cover body 2 together form a waterproof housing with surrounding walls and an internal accommodating space. This accommodating space is used to house corresponding functional components. For example, when the housing is used as a water heater housing, the accommodating space is used to accommodate components such as burners and heat exchangers. Specifically, when used as a water heater housing, the water heater is usually installed on a wall, such as... Figure 2 As shown, the side of the casing closest to the mounting wall is the rear side B, and the side of the casing opposite to the rear side B, closer to the user, is the front side A.

[0059] The top panel 20 covers at least part of the top panel 10 of the box, and the top panel 10 and the top panel 20 are connected by a connecting part 3; the top panel 10 is provided with a protrusion 11, which protrudes toward the top panel 20 and abuts against the top panel 20, and the protrusion 11 extends around the connecting part 3; the edge of the top panel 20 is provided with a flange 21, which bends toward the top panel 10 and abuts against the top panel 10.

[0060] The structure consists of a top plate 10, a cover plate 20, and a protrusion 11. After the top plate 10 and the cover plate 20 are assembled and fixedly connected by the connecting part 3, the protrusion 11 abuts against the cover plate 20 to prevent water from entering the outer shell through the gap between the top plate 10 and the connecting part 3. A flange 21 is provided on the edge of the cover plate 20. The flange 21 bends towards the top plate 10 and abuts against the top plate 10, thereby protecting the adjacent gap between the edge of the cover plate 20 and the edge of the top plate 10 and preventing water from flowing in. The sealing is achieved through a mechanical structure. The structure is simple, easy to assemble, and can maintain the waterproof function of the structure during repeated disassembly and assembly.

[0061] In practice, the housing can be used as the housing for other devices. The top plate and the top plate of the box are connected by a connecting part, and the protrusion and flange can also be used in other positions of the housing.

[0062] like Figures 1-4As shown, the connecting part 3 includes a boss 13, a receiving cover 23, and a fastener (not shown in the figure). The boss 13 is disposed on the top plate 10 and protrudes outward in a direction away from the interior of the box body 1. The receiving cover 23 is disposed on the top plate 20 and protrudes outward in a direction away from the interior of the box body 1. The receiving cover 23 is configured to cooperate with the boss 13 to accommodate the boss 13. The fastener passes through the receiving cover 23 and the boss 13 and secures the receiving cover 23 to the boss 13. By providing the boss 13 on the top plate 10 and the receiving cover 23 on the top plate 20, and by fixing the boss 13 and the receiving cover 23 together, the top plate 10 and the top plate 20 are fixedly connected by the connecting part 3. The boss 13 on the top plate 10 and the receiving cover 23 on the top plate 20 are made by stamping. The stamped connection structure avoids the presence of an open gap at the top of the box 1, thereby reducing gaps for water inflow and improving waterproof performance. After the top plate 10 and the top plate 20 are welded and fixed, fasteners are used to penetrate the receiving cover 23 and the boss 13 inside the receiving cover 23 to achieve a tight fit, causing the top plate 10 and the top plate 20 to abut against each other. The protrusion 11 on the top plate 10 abuts and presses against the top plate 20, thereby blocking water from flowing into the outer shell along the gap between the top plate 10 and the top plate 20, thus improving waterproof performance. The fastener is a screw, but other fasteners can be selected as needed in other embodiments.

[0063] like Figure 1 and Figure 3 As shown, in a specific implementation, the connecting part is located near the rear side B of the outer casing.

[0064] like Figure 3 and Figure 7 As shown, the receiving cover 23 has an opening 230 for the boss 13 to enter, the opening 230 facing the rear side B of the housing 1, and the top plate 20, except for the edge with the receiving cover 23, has flanges 21. The top plate 20 has a generally flat plate structure, with the receiving cover 23 as its protruding part. Figure 2 and Figure 6 As shown, the top plate 20 is connected to the top plate 10 of the tank and has flanges 21 at the edges exposed to the external space. However, no flanges 21 are provided below the structure of the housing 23, so that the housing 23 and the top plate 20 around the housing 23 directly abut against the top plate 10 of the tank, reducing the gaps through which water can pass.

[0065] like Figure 3 As shown, the shape of the middle part of the top plate 20 matches the shape of the pipe connection port 5 and is provided with a U-shaped edge. These edges are all fixedly connected to the top plate 10 and are provided with flanges 21 that bend towards the top plate 10 to block the gaps in the connection part.

[0066] As one embodiment of the housing cover, the housing cover 23 has an opening 230 for the boss 13 to enter, which serves as a guide during assembly. The opening 230 extends from the housing cover 23 toward the rear side B of the housing 1 and to the edge of the top plate 20. After the operator places the top plate 10 under the top plate 20 along the direction of the opening 230, the protrusion 11 of the top plate 10 slides into the housing portion of the top plate 20 through the opening 230. The protrusion 11 abuts against the front side of the housing cover 23 and reaches the assembly position, thereby facilitating assembly.

[0067] In other embodiments, those skilled in the art can design the shape and direction of the opening 230 as needed. Even without the opening 230, it can still achieve a waterproof effect. In this embodiment, the opening 230 is provided to facilitate assembly and serves as a guide during assembly.

[0068] As a preferred embodiment of the protrusion, such as Figure 1 As shown, the protrusion 11 starts from the rear edge 100 of the top plate 10, extends continuously around the boss 13, and extends to the rear edge 100 of the top plate 10, forming a U-shaped protrusion with the opening facing the rear side B of the box body 1 and surrounding the boss 13. By arranging the protrusion 11 continuously around the boss 13 and extending to form a U-shaped protrusion, a waterproof structure is formed around the boss 13, that is, around the connection part 3 of the top plate 10 and the cover plate 20. The boss 13 is provided around the connection part 3 to prevent water from flowing in, thereby increasing the waterproof performance of the shell and preventing water from flowing into the shell along the gaps.

[0069] Among them, the U-shape is one of the shapes formed by the continuous arrangement of the protrusions 11 around the boss 13. In other embodiments, those skilled in the art can set the specific shape and setting trajectory of the protrusions 11 as needed, with the protrusions 11 blocking the gap of the connecting part 3 on the same side of the protrusions 11. The shape of the continuous arrangement of the protrusions 11 may include, but is not limited to, rectangle, semicircle, trapezoid.

[0070] like Figure 1 and Figure 3As shown, both the boss 13 and the receiving cover 23 are provided with inclined surfaces, which are arranged facing the front side A of the box body 1. The receiving cover 23 and the corresponding position of the inclined surface of the boss 13 are provided with through holes 4, and fasteners are inserted through the through holes 4. In this embodiment, the shapes of the boss 13 and the receiving cover 23 are matched. The boss 13 has a first inclined surface 131 facing the front side A of the box 1, and the receiving cover 23 has a second inclined surface 231 facing the front side A of the box 1. Corresponding positions of the first inclined surface 131 and the second inclined surface 231 are provided with coaxially arranged through holes 4. Fasteners pass through the through holes 4 to fix the boss 13 and the receiving cover 23. On the one hand, by setting the inclined surface, the fasteners can be installed on the inclined surface, which is more convenient for fastener installation and fastening operations than for fasteners to pass through the horizontal surface. On the other hand, since the rear side B of the box 1 is usually close to the wall where the box 1 is installed during the installation and assembly of the box 1, the inclined surface faces the front side A of the box 1, so that the fastener assembly faces the same side as the installation operator, which makes it easier to leave more space for the installation of the box 1 and the fastener installation.

[0071] like Figure 1 and Figure 3 As shown, each first inclined surface 131 is provided with a through hole 4, and the second inclined surface 231 is provided with a corresponding through hole 4. In other embodiments, the number and distribution of through holes 4 can be designed as needed by those skilled in the art.

[0072] As a preferred embodiment of the boss and housing cover, such as Figures 1-6 As shown, the boss 13 is a triangular structure protruding outward from the surface of the top plate 10, and the receiving cover 23 is a trapezoidal structure protruding outward from the surface of the cover top plate 20. In this embodiment, by making the boss 13 protrude outward from the surface of the top plate 10 to form a triangular structure, and the receiving cover 23 protruding outward from the surface of the cover top plate 20 to form a trapezoidal structure, both are formed with inclined surfaces for fasteners to be inserted. The triangular structure is stable under force, and the projection of the trapezoidal structure of the receiving cover 23 onto the top plate 10 covers the triangular structure of the boss 13, reducing the direct impact of water flow on the boss 13 and blocking the water flow outside the receiving cover 23, thereby increasing the waterproof performance.

[0073] In other embodiments, the shapes of the boss 13 and the receiving cover 23 can be designed as needed, employing other polygonal structures that can form bevels.

[0074] like Figure 1 and Figure 3 As shown, the top plate 10 of the box has a pipe connection port 5 in the center and a groove 12 on the top plate 10. The groove 12 starts from the rear edge 100 of the top plate 10, extends continuously around the pipe connection port 5, and extends to the rear edge 100 of the top plate 10, forming a U-shaped groove 12 with the opening facing the rear side B of the box body 1 and surrounding the pipe connection port 5; the groove 12 is for the corresponding flange 21 to be embedded.

[0075] By providing a groove 12 on the top plate 10 for the corresponding flange 21 to be inserted, the flange 21 is inserted into and pressed against the groove 12, forming a mating structure between the flange 21 and the groove 12, which serves to block water and prevent water from flowing in through the gap between the flange 21 and the top plate 10. The water-blocking structure formed by the fitting of the groove 12 and the flange 21, together with the water-blocking structure formed by the abutment of the protrusion 11 and the top plate 20, achieves the effect of multi-layer water blocking to improve waterproof performance.

[0076] The pipe connection port 5 is used for the internal structure of the box 1 to pass through, which is required for the structure of the box 1. Its specific arrangement and shape can be designed as needed. The groove 12 is continuously distributed to surround the pipe connection port 5 to the same side of the groove 12, so that the flange 21 at the corresponding position of the top plate 20 can be embedded to form a water-blocking structure, preventing water from flowing in along the gap between the flange 21 and the top plate 10, and increasing the waterproofness. The shape of the continuously arranged groove 12 can be designed as needed, including but not limited to rectangle, semicircle, trapezoid.

[0077] like Figures 1-7 As shown, there are two connecting parts 3, which are symmetrically distributed on both sides of the pipe connection port 5. In other embodiments, the specific number and distribution of connecting parts 3 can be designed as needed.

[0078] like Figure 1 , Figure 6 and Figure 7 As shown, along the rear side B of the box body 1 towards the front side A of the box body 1, the two ends of the box top plate 10 and the cover plate 20 are inclined inward along the length direction of the box body 1.

[0079] In this design, by tilting the top plate 10 and the top cover plate 20 inward along the length of the box body 1, the length of the top plate 10 and the top cover plate 20 gradually decreases on the same side, so that the shapes of the top plate 10 and the top cover plate 20 form a certain angle rather than a right angle. Since the top angle of the outer cover 22 is a right angle, if the structure of the top and bottom of the box body is also a right angle, it will cause assembly difficulties. Therefore, the corners 6 of the top plate 10 and the top cover plate 20 are designed to have a certain angle, which makes assembly easier. As one embodiment, the corners of the top plate 10 and the top cover plate 20 form a trapezoid. The side of the trapezoid, that is, the edge of the top plate 10 and the top cover plate 20 along the width of the box body 1, forms an angle with the cover 2, rather than a right angle, thereby increasing the range of motion during assembly and avoiding the situation where the contact edges of the box body 1 and the cover 2 form right angles, thereby reducing the precision requirements during assembly on the production line and facilitating assembly. In other embodiments, the shapes of the top plate 10 and the cover plate 20 can be adjusted as needed, and the angle of at least one corner 6 at the top is not a right angle to facilitate assembly.

[0080] like Figure 1 , Figure 6 and Figure 7 As shown, the corner 6 at the top of the box 1, i.e., the included angle formed by the sides of the box top plate 10 and the cover plate 20 in the width and length directions, is rounded to an obtuse angle; the corner 6 at the bottom of the box 1, corresponding to the outer shell, is a right angle for easy assembly. In other embodiments, the shape of the corner 6 and the degree of inclination of the sides of the box top plate 10 and the cover plate 20 can be designed according to actual needs, and waterproofing can be achieved without inclination or rounding. As one embodiment of the corner, the inclination angle of the box top plate 10 and the cover plate 20 is preferably 10°. In other embodiments, the inclination angle of the box top plate 10 and the cover plate 20 can be designed as needed, preferably in the range of 5° to 10°. This is because if the inclination angle is too small, assembly will be inconvenient, and if the inclination angle is too large, the size of the fit at the top of the cover plate 22 will increase, affecting the overall aesthetics of the waterproof cover, but not its waterproof performance.

[0081] A water heater comprising the waterproof housing as described above.

[0082] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship of the device or component during normal use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation at any time, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model in this respect.

[0083] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A waterproof outer casing, characterized in that, The waterproof outer shell includes a box body and a cover body. The box body includes a top plate, and the cover body includes a top plate. The top plate covers at least a portion of the top plate, and the top plate and the top plate are connected by a connecting part. The top plate of the box is provided with a protrusion that protrudes towards and abuts against the top plate, and the protrusion extends around the connecting part; the edge of the top plate is provided with a flange that bends towards and abuts against the top plate.

2. The waterproof outer casing as described in claim 1, characterized in that, The connecting part includes a boss, a receiving cover and a fastener. The boss is disposed on the top plate of the box and protrudes outward in a direction away from the interior of the box. The receiving cover is disposed on the top plate of the cover and protrudes outward in a direction away from the interior of the box. The receiving cover is configured to cooperate with the boss to accommodate the boss. The fastener passes through the receiving cover and the boss and secures the receiving cover to the boss.

3. The waterproof outer casing as described in claim 2, characterized in that, The housing cover has an opening for the boss to enter, the opening facing the rear side of the housing, and the top plate of the cover has flanges on all edges except for the housing cover.

4. The waterproof outer casing as described in claim 2, characterized in that, The protrusion starts from the rear edge of the top plate of the box, extends continuously around the boss until it reaches the rear edge of the top plate of the box, and forms a U-shaped protrusion with the opening facing the rear side of the box and surrounding the boss.

5. The waterproof outer casing as described in claim 3, characterized in that, Both the boss and the receiving cover are provided with inclined surfaces, which are arranged facing the front side of the box. The receiving cover and the corresponding position of the inclined surface of the boss are provided with through holes, and the fasteners are inserted through the through holes.

6. The waterproof outer casing as described in claim 5, characterized in that, The boss is a triangular structure that protrudes outward from the surface of the top plate of the box, and the housing cover is a trapezoidal structure that protrudes outward from the surface of the top plate of the cover.

7. The waterproof outer casing as described in claim 3, characterized in that, The top plate of the box has a pipe connection port in the center and a groove on the top plate. The groove starts from the rear edge of the top plate, extends continuously around the pipe connection port, and extends to the rear edge of the top plate, forming a U-shaped groove with the opening facing the rear side of the box and surrounding the pipe connection port. The groove is for the corresponding flange to be inserted.

8. The waterproof outer casing as described in claim 7, characterized in that, There are two connecting parts, which are symmetrically distributed on both sides of the pipe connection port.

9. The waterproof outer casing as described in claim 1, characterized in that, Along the rear side of the box body towards the front side of the box body, the two ends of the box top plate and the cover plate are inclined inward along the length direction of the box body.

10. The waterproof outer casing as described in claim 7, characterized in that, The tilt angles of the top plate and the cover plate are both in the range of 5° to 10°.

11. The waterproof outer casing as described in any one of claims 1-10, characterized in that, The cover includes an outer cover, which is pressed against the top plate of the cover.

12. A water heater, characterized in that, The water heater includes a waterproof housing as described in any one of claims 1-11.

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