Power board box and water heater having the same

Abstract

The present invention discloses a power board box and a water heater having the same, belonging to the field of wired control boxes. The power board box comprises: a base box including a base plate and three side edges connected to the base plate, wherein two oppositely disposed first and second side edges are each provided with a first positioning portion, and a third side edge between the first and second side edges forms a limiting portion between the base plate, wherein the high-voltage side of the power board can be plugged into the limiting portion and abut against the two first positioning portions; and an upper cover provided on the opening side of the base box. Compared to the prior art requiring the provision of riveted screw columns, the power board box reduces the volume of the base box, eliminates unnecessary interference design, significantly reduces the number of screws, simplifies assembly steps, and reduces processing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of wire control boxes, and in particular to a power board box and a water heater having the same. Background Art

[0002] To prevent high-power water heaters from overheating and catching fire due to long-term operation of electrical components, the existing technology generally solves this problem by adding a sheet metal electrical box. The current design schemes for power board boxes are all assembled with an upper cover and a bottom box. Several sheet metal screw columns are riveted on the bottom surface of the bottom box to fix the power board. A process structure is added to the outside of the bottom box to fix the bottom box to the water heater. The upper cover and the bottom box are assembled to wrap the power board in the box body. A process structure is also added to the outside of the upper cover to fix the upper cover to the water heater. During assembly, first fix the bottom box to the inside of the water heater with more than two screws, then fix the power board to the bottom box with more than two screws, and finally install the upper cover on the bottom box and fasten the upper cover to the water heater with more than two screws to achieve a firm fixation.

[0003] The aforementioned assembly solutions all use screw fastening, which is complex and requires a large number of screws, resulting in a waste of cost. The screw posts inside the base box also require mortise and tenon joints, which reduces component cost. The power supply box only needs to protect the high-voltage components (relay and heater tube connectors); the low-voltage components do not need to be enclosed. Therefore, the redundant components in the above solutions are ineffective and wasteful.

[0004] Therefore, there is an urgent need to provide a power board box and a water heater having the same to solve the above technical problems existing in the prior art. Summary of the Invention

[0005] The object of the present invention is to provide a power supply board box and a water heater having the same, wherein the power supply board box reduces the number of screws, simplifies the assembly steps, and reduces the production cost.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A power board box, comprising:

[0008] The bottom box includes a bottom plate and three side edges connected to the bottom plate, wherein two oppositely disposed first and second side edges are each provided with a first positioning portion, and a third side edge between the first and second side edges forms a limiting portion with the bottom plate, and the high-voltage side of the power board can be plugged into the limiting portion and abut against the two first positioning portions;

[0009] The upper cover is arranged on the opening side of the bottom box.

[0010] As a preferred technical solution for the above-mentioned power board box, a second positioning portion is provided on both the first side and the second side, a third positioning portion is provided on the upper cover corresponding to the second positioning portion, and the second positioning portion and the third positioning portion are snap-fitted.

[0011] As an optimal technical solution for the above-mentioned power board box, a limiting fixing surface is provided on the third side, the limiting fixing surface is parallel to the bottom plate and forms the limiting portion between the bottom plate, and the upper cover is fixedly connected to the limiting fixing surface.

[0012] As a preferred technical solution of the above-mentioned power board box, the upper cover includes:

[0013] a top plate, on which the third positioning portion is provided;

[0014] A connecting arm is connected to the top plate, and the connecting arm abuts against and is fixedly connected to the limiting fixing surface.

[0015] As a preferred technical solution of the above-mentioned power board box, the first positioning portion is a positioning boss, and the shape of the positioning boss is adapted to the shape of the positioning surface of the power board.

[0016] As a preferred technical solution of the above-mentioned power board box, one of the second positioning portion and the third positioning portion is a protrusion, and the other is an assembly hole, and the protrusion and the assembly hole are snap-fitted and fixed.

[0017] As a preferred technical solution of the above-mentioned power board box, an inverted hook structure is provided on the protrusion.

[0018] As a preferred technical solution of the above-mentioned power board box, the second positioning portion includes a top protrusion protruding from the top and a side protrusion protruding from the side away from the limiting portion.

[0019] As a preferred technical solution of the above-mentioned power board box, the first side, the second side and the third side are respectively perpendicular to the three side edges of the bottom plate.

[0020] To achieve the above objectives, the present invention further proposes a water heater, which includes a water heater body and a power board box as described in any of the above technical solutions, wherein the power board box fixes the power board to the water heater body.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The power board box and water heater provided by the present invention have a base box comprising a base plate and three sides connected to the base plate. First positioning portions are provided on two opposing first and second sides, and a third side between the first and second sides forms a limiting portion between the base plate and the power board. The high-voltage side of the power board can be inserted into the limiting portion and abut against the two first positioning portions, thereby pre-fixing the base box and the high-voltage side of the power board. An upper cover is provided on the opening side of the base box. Compared to the prior art requiring riveted screw posts, this reduces the size of the base box, eliminates unnecessary interference fit, significantly reduces the number of screws, simplifies assembly steps, and reduces processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the bottom box of the power board box provided in a specific embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the upper cover of the power board box provided in a specific embodiment of the present invention.

[0025] In the picture:

[0026] 1. Bottom box; 2. Top cover;

[0027] 11. Bottom plate; 12. First side; 13. Second side; 14. Third side; 15. First positioning portion; 16. Positioning and fixing surface; 161. First screw hole; 17. Top protrusion; 18. Side protrusion;

[0028] 21. Top plate; 22. Connecting arm; 221. Second screw hole; 23. Third positioning portion. DETAILED DESCRIPTION

[0029] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the drawings only show portions relevant to the present invention, not all of them.

[0030] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., referring to positions or locations, are based on the positions or locations shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0033] This embodiment provides a power board box, which is used in household appliances such as water heaters and is used to fix the power board on the water heater. Figure 1 and Figure 2 As shown, the power board box in this embodiment includes a base box 1 and an upper cover 2. The base box 1 includes a bottom plate 11 and three side edges connected to the bottom plate 11, namely a first side edge 12, a second side edge 13, and a third side edge 14. First positioning portions 15 are provided on the two oppositely disposed first and second sides 12, 13. A limiting portion is formed between the third side edge 14 and the base plate 11 between the first and second sides 12, 13. The high-current side of the power board can be plugged into the limiting portion and abut against the two first positioning portions 15. The upper cover 2 is provided on the opening side of the base box 1.

[0034] By arranging a first positioning portion 15 on the first side 12 and the second side 13 which are arranged opposite to each other, and forming a limiting portion with the third side 14 and the bottom plate 11, the power board can be inserted into the limiting portion and abut against the two first positioning portions 15, thereby realizing pre-fixation of the bottom box 1 and the high-voltage side of the power board. Compared with the prior art which requires the provision of riveted screw columns, the volume of the bottom box 1 is reduced, unnecessary interference design is eliminated, the number of screws is significantly reduced, the assembly steps are simplified, and the processing cost is reduced.

[0035] Furthermore, a second positioning portion is provided on each of the first side 12 and the second side 13 , and a third positioning portion 23 is provided on the upper cover 2 corresponding to the second positioning portion, and the second positioning portion and the third positioning portion 23 are snap-fitted.

[0036] A limiting fixing surface 16 is provided on the third side 14 . The limiting fixing surface 16 is parallel to the bottom plate 11 and forms the limiting portion with the bottom plate 11 . The upper cover 2 is fixedly connected to the limiting fixing surface 16 .

[0037] Furthermore, the upper cover 2 includes a top plate 21 and a connecting arm 22 connected to the top plate 21. The top plate 21 is provided with the third positioning portion 23. The second positioning portion and the third positioning portion 23 are engaged with each other. The connecting arm 22 is provided below the top plate in a cantilever structure and abuts against and is fixedly connected to the limiting fixing surface 16. Preferably, the fixing is threaded.

[0038] The pre-installation of the bottom box 1 and the upper cover 2 is achieved by the mutual engagement of the second positioning portion and the third positioning portion 23; the connecting arm 22 abuts against the limiting fixing surface 16 and is threadedly fixed. Through this threaded fixation, the upper cover 2, the power board, the bottom box 1 and the water heater can be fixed, further reducing the number of screws, simplifying the assembly steps and reducing processing costs.

[0039] Furthermore, first positioning portion 15 is a positioning boss, the shape of which matches the positioning surface of the power board. During pre-assembly, the high-voltage side of the power board is inserted into the stopper, and the two sides of the power board are pressed against the positioning bosses on both sides, so that the positioning surfaces abut against the surfaces of the positioning bosses, thereby pre-fixing the base box 1 to the high-voltage side of the power board. Compared to the existing technology that requires riveted screw columns, this reduces the size of the base box 1, eliminates unnecessary interference design, reduces the use of screws, and saves costs.

[0040] Furthermore, one of the second positioning portion and the third positioning portion 23 is a protrusion, and the other is an assembly hole, and the protrusion and the assembly hole are fixed by snapping. In this embodiment, the second positioning portion is a protrusion and the third positioning portion 23 is an assembly hole, and the pre-assembly of the bottom box 1 and the upper cover 2 is achieved through this snap-fit structure.

[0041] Optionally, using the first side 12 as an example, the second positioning portion on the first side 12 includes a top protrusion 17 protruding from the top of the first side 12 and a side protrusion 18 protruding from the side of the first side 12 away from the stop. Accordingly, assembly holes are provided on the upper cover 2 at corresponding positions of the top protrusion 17 and the side protrusion 18. The second side 13 and the first side 12 are symmetrically arranged, and their specific structures are not further described here. Compared to the screw connection in the prior art, the base box 1 and the upper cover 2 of the power board box adopt a snap-on fixing method, which not only simplifies the assembly process and facilitates operation, but also reduces the number of screws.

[0042] Further preferably, a hook structure is provided on the top protrusion 17, which cooperates with the side protrusion 18 to prevent the upper cover 2 from moving upward and away from the limit portion after the upper cover 2 is assembled in place, thereby realizing the pre-assembly of the base box 1, the power board and the upper cover 2.

[0043] In this embodiment, the first side 12, the second side 13, and the third side 14 are perpendicular to the three side edges of the bottom plate 11, and the position-limiting fixing surface 16 is perpendicularly connected to the third side 14 to be parallel to the bottom plate 11. A position-limiting portion is formed between the position-limiting fixing surface 16 and the bottom plate 11, and the power board can be horizontally inserted into the position-limiting portion, with the upper surface of the power board abutting the inner top surface of the position-limiting portion.

[0044] Optionally, the first side 12, the second side 13, the third side 14 (including the retaining surface 16), and the bottom plate 11 are integrally formed. Specifically, they can be formed by a flanging process. An integrally formed structure facilitates processing and saves costs. Preferably, the bottom box 1 and the upper cover 2 are both sheet metal components.

[0045] Furthermore, a first screw hole 161 is provided on the position-limiting fixing surface 16, and a second screw hole 221 is provided on the connecting arm 22 of the upper cover 2. The first screw hole 161 and the second screw hole 221 are connected by screws. Optionally, the connecting arm 22 is a cantilever structure connected to the top plate 21, and its length is equal to the distance between the top plate 21 and the position-limiting fixing surface 16, so that the connecting arm 22 abuts the position-limiting fixing surface 16 after the upper cover 2 and the bottom box 1 are assembled in place. The first screw hole 161, the second screw hole 221, and the screw holes on the edge of the power board are concentric with the screw posts on the plastic part of the water heater and are in close contact with each other, so that one screw fixes three parts.

[0046] Optionally, the first screw hole 161 is horseshoe-shaped, which is easy to align with the screw hole on the power board during assembly, thereby facilitating subsequent threaded connection operations.

[0047] This embodiment further provides a water heater, comprising a water heater body and the aforementioned power board box, wherein the power board box is used to secure the power board to the water heater body. Specifically, the water heater body is provided with a plastic part, and the plastic part is provided with a plastic screw column, and the power board box and the power board are secured to the plastic screw column by a single screw.

[0048] The following is a brief description of the installation and use process of the power board box provided in this embodiment.

[0049] During pre-installation, first insert the high-voltage side of the power board horizontally into the limit part, and press the two sides of the power board on the first positioning parts 15 on both sides; then assemble the upper cover 2 with the bottom box 1. During assembly, the top protrusion 17 and the side protrusion 18 are respectively inserted into the corresponding assembly holes of the upper cover 2 to realize the pre-assembly of the bottom box 1, the power board and the upper cover 2.

[0050] After pre-installation, place the entire power board at the corresponding position of the water heater, and fix the power board in place through the first screw hole 161, the second screw hole 221, the screw holes on the edge of the power board and the screw columns on the plastic part of the water heater. The upper cover 2, the power board and the bottom box 1 can be completely fixed to the water heater with only one screw. The other end of the power board is fixed by another screw column on the plastic part of the water heater, thereby achieving firm fixation of the entire power board.

[0051] The water heater utilizes the original plastic screw columns on the water heater, and does not need to add riveted sheet metal screw columns on the sheet metal bottom box 1, thereby reducing the number of screws and significantly reducing production costs.

[0052] 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 embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A power board box, characterized in that: include: A bottom box (1) comprises a bottom plate (11) and three side edges connected to the bottom plate (11); a first positioning portion (15) is provided on two oppositely arranged first side edges (12) and second side edges (13); a third side edge (14) between the first side edges (12) and the second side edges (13) forms a limiting portion with the bottom plate (11); the strong power side of the power board can be plugged into the limiting portion and abut against the two first positioning portions (15); An upper cover (2) is provided on the opening side of the bottom box (1); A limiting fixing surface (16) is provided on the third side (14), the limiting fixing surface (16) is parallel to the bottom plate (11) and forms the limiting portion between the bottom plate (11), and the upper cover (2) is fixedly connected to the limiting fixing surface (16); The upper cover (2) comprises: a top plate (21), a connecting arm (22), the connecting arm (22) being connected to the top plate (21), and the connecting arm (22) being in contact with and fixedly connected to the position-limiting fixing surface (16); A first screw hole (161) is provided on the position-limiting fixing surface (16), and a second screw hole (221) is provided on the connecting arm (22) of the upper cover (2). The first screw hole (161) and the second screw hole (221) are connected by screws. The first screw hole (161), the second screw hole (221), and the screw holes on the edge of the power board are concentric and in close contact with each other.

2. The power board box according to claim 1, characterized in that: A second positioning portion is provided on both the first side (12) and the second side (13), and a third positioning portion (23) is provided on the upper cover (2) corresponding to the second positioning portion, and the second positioning portion and the third positioning portion (23) are snap-fitted.

3. The power board box according to claim 2, characterized in that: The third positioning portion (23) is provided on the top plate (21).

4. The power board box according to claim 1, characterized in that: The first positioning portion (15) is a positioning boss, and the shape of the positioning boss is adapted to the shape of the positioning surface of the power board.

5. The power board box according to claim 2, characterized in that: One of the second positioning portion and the third positioning portion (23) is a protrusion, and the other is an assembly hole, and the protrusion and the assembly hole are clamped and fixed.

6. The power board box according to claim 5, characterized in that: The protrusion is provided with an undercut structure.

7. The power board box according to claim 5, characterized in that: The second positioning portion comprises a top protrusion (17) protruding from the top and a side protrusion (18) protruding from a side away from the limiting portion.

8. The power board box according to claim 1, characterized in that: The first side edge (12), the second side edge (13) and the third side edge (14) are respectively perpendicular to the three side edges of the bottom plate (11).

9. A water heater, characterized in that: The utility model comprises a water heater body and a power board box according to any one of claims 1 to 8, wherein the power board box fixes the power board on the water heater body.

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