Efficient assembly structure of bath heater PTC heating body module

Abstract

The utility model relates to the technical field of bath heater accessories, and discloses an efficient assembly structure of a bath heater PTC heating body module. The efficient assembly structure is installed in a bath heater main machine box body, the bath heater main machine box body comprises a cover plate, and an installation cavity is formed between the bath heater main machine box body and the cover plate; clamping concave tables are arranged on the surfaces of the inner walls of the two sides of the installation cavity, a PTC heating body is arranged in the installation cavity, the two sides of the PTC heating body are connected with fixing supports in a clamped mode respectively, and the fixing supports on the two sides are symmetrically installed; the PTC heating body and the fixing support are connected through the clamping concave table and the installation cavity. A protective grating is arranged between the fixed bracket and the cover plate; the utility model has the advantages of reduced installation process and dispersed thermal stress, and solves the problems of low production efficiency, inconvenient disassembly and easy deformation due to thermal stress in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of ice-making device technology, specifically to a high-efficiency assembly structure for a bathroom heater PTC heating element module. Background Technology

[0002] Traditional bathroom heater PTC heating element modules typically employ an integral metal frame structure, with the heating element fixed to the housing via welding or bolts. Common methods include directly welding the PTC heating element to the metal bracket and then installing it as a whole into the main unit housing, or using multiple sets of bolts to secure the heating element to the bracket, with additional protective grilles and covers. While this structure achieves basic fixation, it suffers from cumbersome assembly procedures, reliance on manual adjustment for positioning accuracy, and inherent tolerances. Furthermore, the integral frame is prone to deformation under high-temperature conditions due to concentrated thermal stress, potentially leading to poor contact or safety hazards with prolonged use.

[0003] Based on the above structure, traditional assembly methods have significant shortcomings: First, welding or bolting connections require specialized tools and skilled workers, resulting in low production efficiency and high costs; second, maintenance and replacement require disassembling the entire frame, making maintenance inconvenient; third, rigid connections cannot compensate for differences in thermal expansion, easily leading to structural deformation or loosening of connections. In contrast, the structure of this utility model not only simplifies the assembly process but also achieves rapid maintenance and high-precision positioning through modular design. Furthermore, the split bracket disperses thermal stress, significantly improving the reliability and economy of the product. Summary of the Invention

[0004] (I) Technical problem to be solved: In view of the shortcomings of the prior art, this utility model provides a high-efficiency assembly structure for the PTC heating element module of a bathroom heater, which has the advantages of reducing installation steps and dispersing thermal stress, and solves the problems of low production efficiency, inconvenient disassembly and easy deformation due to thermal stress in the prior art.

[0005] (II) Technical Solution: To achieve the above-mentioned goals of reducing installation steps and dispersing thermal stress, this utility model provides the following technical solution: A high-efficiency assembly structure for a bathroom heater PTC heating element module, installed inside the bathroom heater main unit housing. The bathroom heater main unit housing includes a cover plate, and an installation cavity is formed between the bathroom heater main unit housing and the cover plate. The inner wall surfaces on both sides of the installation cavity are provided with locking recesses. A PTC heating element is arranged inside the installation cavity. Fixed brackets are respectively connected to both sides of the PTC heating element by snap-fit. The fixed brackets on both sides are symmetrically installed. The PTC heating element and the fixed brackets are connected to the installation cavity through the locking recesses. A protective grille is provided between the fixed brackets and the cover plate.

[0006] Preferably, the cover plate has a positioning boss on its surface, the positioning boss being adapted to the size of the protective grille, and when the cover plate is connected to the bathroom heater main unit housing, the protective grille is located inside the positioning boss.

[0007] Preferably, both sides of the protective grille and the cover plate are provided with fixing holes, and self-tapping screws are provided in the fixing holes. The protective grille and the cover plate are fixed together by the self-tapping screws.

[0008] Preferably, at least two locking blocks are provided on both sides of the PTC heating element, and the surface of the fixing bracket is provided with slots corresponding to the position and number of the locking blocks. The PTC heating element and the fixing bracket are connected by locking blocks and slots.

[0009] Preferably, the locking recess is adapted to the locking block, and the portion of the locking block extending beyond the locking slot is connected to the locking recess by a locking action; the number of locking recesses is the same as the number of locking blocks.

[0010] Preferably, at least three supporting reinforcing ribs are provided on both outer surfaces of the mounting cavity, and the length of the supporting reinforcing ribs is the same as the distance from the outer surface of the fixing bracket to the inner surface of the mounting cavity.

[0011] Preferably, the upper and lower ends of the fixed bracket are respectively provided with an upper top plate and a lower top plate protruding towards the PTC heating element, the lower surface of the upper top plate is in contact with the upper surface of the PTC heating element, and the upper surface of the lower top plate is in contact with the lower surface of the PTC heating element.

[0012] Preferably, the outer surface of the protective grille is provided with uniformly distributed metal grilles.

[0013] (III) Beneficial Effects: Compared with the prior art, this utility model provides a highly efficient assembly structure for a bathroom heater PTC heating element module, which has the following beneficial effects:

[0014] 1. This highly efficient assembly structure for a bathroom heater PTC heating element module utilizes symmetrically distributed independent fixing brackets at both ends of the PTC heating element. A precisely designed snap-fit ​​and snap-fit ​​structure enables rapid positioning and installation. Combined with layered protective grilles and removable covers, a complete assembly system is formed. Compared to traditional welded or bolted integral frames, this structure offers three main advantages: First, simplified assembly process. The use of split brackets and snap-fit ​​connections simplifies the previously complex multi-step installation process. Second, improved maintenance convenience. When replacing the PTC heating element, only partial component disassembly is required, avoiding the cumbersome process of complete disassembly as in traditional methods. Third, guaranteed positioning accuracy. The precise snap-fit ​​structure and layered assembly design effectively reduce the impact of manual operation on installation accuracy. Overall, this innovative assembly structure not only improves production efficiency but also significantly enhances product quality stability and ease of use and maintenance, providing a completely new solution for the assembly process of bathroom heater PTC heating element modules.

[0015] 2. This efficient assembly structure for a bathroom heater PTC heating element module divides the traditional bracket into two supports located on either side of the PTC heating element. Existing technologies using an integral frame structure have significant technical defects. For example, the PTC heating element undergoes significant thermal expansion during operation, and the rigid connection structure cannot effectively compensate for this thermal deformation. This leads to concentrated thermal stress on the frame under high-temperature conditions, resulting in structural deformation and loosening of connectors. This structural defect not only affects the product's operational stability but may also cause poor electrical contact and safety hazards with long-term use. To address this technical challenge, this invention creatively decomposes the traditional integral bracket into two independent split supports, each positioned on either side of the PTC heating element. This innovative design effectively disperses thermal stress through structural decomposition, allowing each support unit to independently adapt to the thermal expansion deformation of the PTC heating element, thus avoiding stress concentration. Simultaneously, the split structure provides necessary compensation space for thermal expansion, ensuring good structural integrity and connection reliability under high-temperature operating conditions. This improvement not only fundamentally solves the technical defects of the traditional structure, but also significantly improves the safety performance and service life of the product. At the same time, the simplified structure reduces production costs, achieving a dual improvement in technical performance and economy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the mounting cavity and the PTC heating element of this utility model during assembly;

[0018] Figure 3 for Figure 2 Enlarged schematic diagram of a portion of the connection point of the central fixed bracket;

[0019] Figure 4 This is a schematic diagram of the structure of this utility model without the cover plate assembled;

[0020] Figure 5 This is a schematic diagram of the complete assembly of this utility model.

[0021] In the diagram: 1. Bathroom heater main unit housing; 2. Cover plate; 21. Positioning boss; 3. Mounting cavity; 31. Locking recess; 32. Reinforcing rib structure; 4. PTC heating element; 41. Locking block; 5. Fixing bracket; 51. Locking slot; 52. Upper top plate; 53. Lower top plate; 6. Protective grille; 7. Fixing hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5 A high-efficiency assembly structure for a PTC heating element module in a bathroom heater is disclosed. This structure is installed inside the main unit housing 1 of the bathroom heater for mounting the PTC heating element 4 within the housing 1. The main unit housing 1 includes a cover plate 2. An mounting cavity 3 for mounting the PTC heating element 4 is formed between the main unit housing 1 and the cover plate 2. The inner walls of both sides of the mounting cavity 3 are provided with locking recesses 31. At least two locking blocks 41 are provided on both sides of the PTC heating element 4, which are respectively connected to fixing brackets 5 via locking mechanisms. The surface of the fixing brackets 5 has locking slots 51 corresponding to the position and number of locking blocks 41. A certain expansion space can exist between the locking slots 51 and the locking blocks 41 to accommodate deformation caused by thermal stress. The heating element 4 and the fixed bracket 5 are connected by a snap-fit ​​connection through a snap-fit ​​block 41 and a snap-fit ​​opening 51. The fixed brackets 5 on both sides are installed symmetrically. The snap-fit ​​recess 31 is adapted to the snap-fit ​​block 41. The part of the snap-fit ​​block 41 that extends beyond the snap-fit ​​opening 51 is connected to the snap-fit ​​recess 31 through a snap-fit ​​connection. The number of snap-fit ​​recesses 31 is the same as the number of snap-fit ​​blocks 41. A protective grille 6 is provided between the fixed bracket 5 and the cover plate 2. This utility model, together with the layered protective grille 6 and the detachable cover plate 2, forms a complete assembly system. The use of a split bracket and snap-fit ​​connection method makes the originally complex multi-process installation process simple and intuitive, avoids the cumbersome process of having to disassemble the whole thing in the traditional way, ensures positioning accuracy, and effectively reduces the impact of manual operation on installation accuracy.

[0024] Please see Figure 1 and Figure 5 The cover plate 2 has a positioning boss 21 on its surface. The positioning boss 21 is adapted to the size of the protective grille 6 and plays a positioning role for the protective grille 6 during installation. When the cover plate 2 is connected to the bathroom heater main unit box 1, the protective grille 6 is located inside the positioning boss 21. In this embodiment, the outer surface of the protective grille 6 is provided with a uniformly distributed metal grille. The upper surface of the positioning boss 21 that contacts the protective grille 6 is hollowed out to prevent the inside of the equipment from overheating and to play a role in heat dissipation between the equipment, making the overall structure more stable and safe.

[0025] Please see Figure 1 and Figure 3 Both sides of the protective grille 6 and the cover plate 2 are provided with fixing holes 7, and self-tapping screws are installed in the fixing holes 7. The protective grille 6 and the cover plate 2 are fixed together by the self-tapping screws. In this embodiment, the corresponding positions on both sides of the bathroom heater main unit box 1 are also provided with fixing holes 7. The three are fixedly connected by self-tapping screws, which at the same time ensures that the PTC heating element 4 will not shake between the bathroom heater main unit box 1 and the protective grille 6. At the same time, the use of self-tapping screws can also take advantage of the unique micro-elastic locking characteristics of self-tapping screws to compensate for the thermal expansion displacement of the PTC module under high temperature conditions of 0.2-0.3mm.

[0026] Please see Figure 3 At least three supporting reinforcing ribs 32 are provided on both outer surfaces of the mounting cavity 3 to ensure structural stability and avoid the structure from being too tightly packed together, which could cause overheating inside the equipment. The length of the supporting reinforcing ribs 32 is the same as the distance from the outer surface of the fixed bracket 5 to the inner surface of the mounting cavity 3.

[0027] Please see Figure 3 The upper and lower ends of the fixed bracket 5 are respectively provided with an upper top plate 52 and a lower top plate 53 protruding towards the PTC heating element 4. The lower surface of the upper top plate 52 is in contact with the upper surface of the PTC heating element 4, and the upper surface of the lower top plate 53 is in contact with the lower surface of the PTC heating element 4, thus confining the PTC heating element 4 inside the fixed bracket 5 and preventing the PTC heating element 4 from moving in the vertical direction.

[0028] In summary, this efficient assembly structure of the PTC heating element module for a bathroom heater, combined with the layered protective grille 6 and the removable cover plate 2, forms a complete assembly system. The use of a split bracket and snap-fit ​​connection method simplifies the originally complex multi-step installation process, avoiding the cumbersome process of complete disassembly required by traditional methods. It ensures positioning accuracy, effectively reduces the impact of manual operation on installation accuracy, and fully considers the issue of thermal stress compensation. Appropriate gaps are reserved at key connection points to ensure stable structural performance even under high-temperature working environments.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency assembly structure for a PTC heating element module of a bathroom heater, installed inside the main unit housing (1) of the bathroom heater, the main unit housing (1) including a cover plate (2), and an installation cavity (3) is provided between the main unit housing (1) and the cover plate (2), characterized in that: The inner wall surfaces on both sides of the mounting cavity (3) are provided with locking recesses (31). A PTC heating element (4) is provided inside the mounting cavity (3). The two sides of the PTC heating element (4) are respectively connected to fixing brackets (5) by locking. The fixing brackets (5) on both sides are symmetrically installed. The PTC heating element (4) and the fixing brackets (5) are connected to the mounting cavity (3) through the locking recesses (31). A protective grille (6) is provided between the fixing brackets (5) and the cover plate (2).

2. The efficient assembly structure of a bathroom heater PTC heating element module according to claim 1, characterized in that: The cover plate (2) is provided with a positioning boss (21) on its surface. The positioning boss (21) is adapted to the size of the protective grille (6). When the cover plate (2) is connected to the bathroom heater main unit box (1), the protective grille (6) is located inside the positioning boss (21).

3. The efficient assembly structure of a bathroom heater PTC heating element module according to claim 1, characterized in that: The protective grille (6) and the cover plate (2) are provided with fixing holes (7) on both sides. Self-tapping screws are provided in the fixing holes (7). The protective grille (6) and the cover plate (2) are fixed together by the self-tapping screws.

4. The efficient assembly structure of a bathroom heater PTC heating element module according to claim 1, characterized in that: At least two locking blocks (41) are provided on both sides of the PTC heating element (4), and the surface of the fixed bracket (5) is provided with slots (51) corresponding to the position and number of the locking blocks (41). The PTC heating element (4) and the fixed bracket (5) are connected by locking blocks (41) and slots (51).

5. The efficient assembly structure of a bathroom heater PTC heating element module according to claim 4, characterized in that: The locking recess (31) is adapted to the locking block (41), and the part of the locking block (41) that extends beyond the locking slot (51) is connected to the locking recess (31) by locking; the number of locking recesses (31) is the same as the number of locking blocks (41).

6. The efficient assembly structure of a bathroom heater PTC heating element module according to claim 1, characterized in that: The outer surfaces of both sides of the mounting cavity (3) are provided with at least three supporting reinforcing rib structures (32), and the length of the supporting reinforcing rib structure (32) is the same as the distance from the outer surface of the fixed bracket (5) to the inner surface of the mounting cavity (3).

7. The efficient assembly structure of a bathroom heater PTC heating element module according to claim 1, characterized in that: The upper and lower ends of the fixed bracket (5) are respectively provided with an upper top plate (52) and a lower top plate (53) protruding towards the PTC heating element (4). The lower surface of the upper top plate (52) is in contact with the upper surface of the PTC heating element (4), and the upper surface of the lower top plate (53) is in contact with the lower surface of the PTC heating element (4).

8. The efficient assembly structure of a bathroom heater PTC heating element module according to claim 1, characterized in that: The outer surface of the protective grille (6) is provided with uniformly distributed metal grilles.

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