PTC heater and heat dissipation structure thereof

Abstract

The application belongs to the technical field of PTC heaters, and discloses a PTC heater and a heat dissipation structure thereof. The heat dissipation structure comprises a plurality of heat dissipation pieces connected in sequence, wherein the heat dissipation piece comprises a mounting frame, a plurality of heat dissipation fins are arranged in the mounting frame at intervals, two L-shaped plates are symmetrically arranged on one side of the mounting frame, a mounting groove is formed on the inner side of the horizontal section of the L-shaped plate, a T-shaped plate is arranged on the side of the mounting frame away from the L-shaped plate, the horizontal section of the T-shaped plate passes between the two L-shaped plates on the adjacent heat dissipation piece in the horizontal direction, and the vertical sections of the T-shaped plate are in sliding fit with the two mounting grooves of the adjacent heat dissipation piece at the upper end and the lower end, respectively. The heat dissipation structure is convenient to assemble and disassemble, and convenient to produce. Meanwhile, the overall structure formed by the plurality of heat dissipation pieces can expand the heat dissipation area through the heat dissipation fins in the mounting frame, and the heat dissipation efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of PTC heater technology, and in particular to a PTC heater and its heat dissipation structure. Background Technology

[0002] PTC heating elements, also known as PTC heaters, consist of a PTC ceramic heating element and an aluminum tube. This type of PTC heater boasts advantages such as low thermal resistance and high heat exchange efficiency, making it an automatic temperature-controlled and energy-saving electric heater. A key feature is its safety performance; under any application, it will not exhibit the surface "reddening" phenomenon seen in electric heating tube heaters, thus avoiding safety hazards such as burns and fires.

[0003] Currently, most PTC heater radiators use a design where two metal plates clamp a corrugated heat sink fin. This results in a large number of welded connection points, complex positioning, and time-consuming welding processes, thus reducing production convenience. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a PTC heater and its heat dissipation structure.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a PTC heater and its heat dissipation structure, comprising a plurality of heat dissipation components connected end to end in sequence, each heat dissipation component comprising a mounting frame, wherein a plurality of heat dissipation fins are spaced apart within the mounting frame, and two L-shaped plates are symmetrically arranged on one side of the mounting frame, wherein a mounting groove is provided on the inner side of the horizontal section of the L-shaped plate, and a T-shaped plate is arranged on the side of the mounting frame away from the L-shaped plate, wherein the horizontal section of the T-shaped plate passes horizontally between two L-shaped plates on adjacent heat dissipation components, and the upper and lower ends of the vertical section of the T-shaped plate are respectively slidably engaged with the two mounting grooves of the adjacent heat dissipation components.

[0006] By adopting the above technical solution, a mounting frame, heat sink, L-shaped plate, and T-shaped plate are set up. By designing the end-to-end connection structure of the L-shaped plate and the T-shaped plate, several heat sinks can be spliced ​​by inserting the horizontal section of the T-shaped plate between the two L-shaped plates of adjacent heat sinks and by sliding the vertical section of the T-shaped plate with the mounting groove. On the one hand, this allows for flexible adjustment of the length of the heat sinks, and the number of heat sinks can be increased or decreased according to actual heat dissipation needs to adapt to different scenarios. On the other hand, it facilitates assembly and disassembly, making production convenient. At the same time, the overall structure formed by splicing several heat sinks can expand the heat dissipation area through the heat sink in the mounting frame, resulting in high heat dissipation efficiency.

[0007] Furthermore, the mounting frame has two horizontally arranged support plates spaced apart along its height on the side away from the L-shaped plate. When connected, the support plates abut against the vertical section of the L-shaped plate on the adjacent heat sink.

[0008] By adopting the above technical solution and setting a support plate, the support plate abuts against the vertical section of the adjacent L-shaped heat sink plate during connection, providing an additional support point for the connection of adjacent heat sinks.

[0009] Furthermore, a locking block is provided on the side of the support plate away from the mounting frame, and a slot adapted to the locking block is provided on the vertical section of the L-shaped plate. When connected, the locking block engages with the slot of the adjacent heat sink.

[0010] By adopting the above technical solution, setting up card blocks and card slots, and further locking adjacent heat dissipation components through a snap-fit ​​structure, the overall structure of the heat dissipation components is made more stable and reliable, and the durability of the product under complex working conditions is improved.

[0011] Furthermore, the spacing between the vertical sections of the two L-shaped plates is consistent with the thickness of the horizontal section of the T-shaped plate.

[0012] By adopting the above technical solution, the spacing between the vertical sections of the two L-shaped plates is designed to be consistent with the thickness of the horizontal section of the T-shaped plate, thus achieving a proper fit between the T-shaped and L-shaped plates. Eliminating the gap between the horizontal section of the T-shaped plate and the vertical section of the L-shaped plate makes the entire heat sink structure more regular.

[0013] Furthermore, two protruding strips are provided on each side of the horizontal section of the T-shaped plate. The two protruding strips on the same side are arranged at intervals in the horizontal direction. The two adjacent sides of the two protruding strips and the surface of the T-shaped plate form a receiving groove. When connected, the end of the vertical section of the L-shaped plate is engaged with the receiving groove on the adjacent heat sink.

[0014] By adopting the above technical solution, the vertical end of the L-shaped plate is engaged with the receiving groove during connection. The connection between the T-shaped plate and the L-shaped plate is further fixed by the engagement of the protrusion with the L-shaped plate, thereby enhancing the firmness of the connection.

[0015] Furthermore, the mounting frame is provided with retaining strips on two sides perpendicular to the sides where the L-shaped plate and T-shaped plate are located, and the length direction of the retaining strips is perpendicular to the length direction of the mounting frame.

[0016] The second aspect of this application provides a PTC heater, including a heating core and the aforementioned heat dissipation structure. The heat dissipation components are in two sets, respectively disposed on both sides of the heating core, and the heat dissipation components are fixedly connected to the heating core by conductive adhesive.

[0017] By adopting the above technical solution, two sets of heat sinks are located on both sides of the heating core, and the heat sinks and the heating core are fixedly connected and electrically connected by conductive adhesive. This achieves the integration of heat dissipation and conductivity. The heat sinks on both sides can simultaneously dissipate heat from the heating core in both directions, greatly expanding the heat dissipation area, quickly removing the heat generated by the heating core, and improving the heat dissipation efficiency of the PTC heater.

[0018] Furthermore, a metal plate is provided on the side of the heat sink away from the heat-generating core, and a wiring terminal is provided on the metal plate.

[0019] By adopting the above technical solution, the terminal block provides a convenient external electrical connection interface for the PTC heater.

[0020] Furthermore, the metal sheet is fixedly connected to the heat sink by conductive adhesive or welding. By adopting the above technical solution, the conductive adhesive connection method is easy to install and can ensure good conductivity.

[0021] Furthermore, the heating core includes a plurality of ceramic heating elements arranged along the layout direction of the heat sink, and the ceramic heating elements are located between the retaining strips of two adjacent heat sinks.

[0022] In summary, this utility model has the following beneficial effects: 1. In this application, an installation frame, heat sink, L-shaped plate, and T-shaped plate are provided. By designing the end-to-end connection structure of the L-shaped plate and the T-shaped plate, several heat sinks can be spliced ​​by inserting the horizontal section of the T-shaped plate between the two L-shaped plates of adjacent heat sinks and by sliding the vertical section of the T-shaped plate with the installation groove. On the one hand, this allows for flexible adjustment of the length of the heat sinks, and the number of heat sinks can be increased or decreased according to actual heat dissipation needs to adapt to different scenarios. On the other hand, it facilitates assembly and disassembly, making production convenient. At the same time, the overall structure formed by splicing several heat sinks can expand the heat dissipation area through the heat sink in the installation frame, resulting in high heat dissipation efficiency. 2. In this application, the spacing between the vertical sections of the two L-shaped plates is designed to be consistent with the thickness of the horizontal section of the T-shaped plate, thus achieving a proper fit between the T-shaped and L-shaped plates. This eliminates the gap between the horizontal section of the T-shaped plate and the vertical section of the L-shaped plate, making the overall structure of the heat sink more regular. 3. In this application, two sets of heat sinks are located on both sides of the heating core, and the heat sinks and the heating core are fixedly connected and electrically connected by conductive adhesive. This achieves the integration of heat dissipation and conductivity. The heat sinks on both sides can simultaneously dissipate heat from the heating core in both directions, greatly expanding the heat dissipation area, quickly removing the heat generated by the heating core, and improving the heat dissipation efficiency of the PTC heater. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the heat dissipation structure of this utility model; Figure 2 yes Figure 1 Enlarged view of part A; Figure 3 This is a schematic diagram of the structure of the heat sink of this utility model; Figure 4 This is a schematic diagram of the overall structure of the PTC heater of this utility model; Figure 5This is a schematic diagram of the heat dissipation structure and heating core of this utility model.

[0024] In the diagram: 10. Heat sink; 11. Mounting frame; 111. Heat sink fin; 12. L-shaped plate; 13. Mounting groove; 14. T-shaped plate; 15. Support plate; 16. Locking block; 17. Locking slot; 18. Raised strip; 19. Locking strip; 20. Heating core; 21. Ceramic heating element; 30. Metal sheet; 31. Wiring terminal. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] like Figure 1-3 As shown in the figure, this application discloses a heat dissipation structure, including a plurality of heat dissipation components 10 connected end to end. Each heat dissipation component 10 is a basic unit for splicing and heat dissipation, and mainly includes a mounting frame 11, a heat sink 111, an L-shaped plate 12 and a T-shaped plate 14. The heat dissipation component 10 is integrally formed by aluminum extrusion process.

[0027] Specifically, the mounting frame 11 is a rectangular frame structure, with several heat sinks 111 spaced apart along the length of the mounting frame 11, forming gaps between adjacent heat sinks 111 for airflow. Two L-shaped plates 12 are symmetrically arranged on one side of the mounting frame 11, positioned near the upper and lower edges of the mounting frame 11, respectively. Each L-shaped plate 12 consists of a horizontal section and a vertical section, with the horizontal section extending outwards towards the mounting frame 11 and the vertical section parallel to the side of the mounting frame 11. A mounting groove 13 is formed on the inner side of the horizontal section of the L-shaped plate 12. A T-shaped plate 14 is located on the side of the mounting frame 11 away from the L-shaped plate 12. The T-shaped plate 14 consists of a horizontal section and a vertical section, with the horizontal section extending horizontally in the opposite direction to the horizontal section of the L-shaped plate 12, and the vertical section extending along the height of the mounting frame 11, connecting to the middle of the horizontal section. The horizontal section of the T-shaped plate 14 passes horizontally between two L-shaped plates 12 on adjacent heat sinks 10, and the upper and lower ends of the vertical section of the T-shaped plate 14 slide in engagement with the two mounting slots 13 of the adjacent heat sink 10, respectively. By designing the end-to-end connection structure between the L-shaped plate 12 and the T-shaped plate 14, several heat sinks 10 can be spliced ​​together by the horizontal section of the T-shaped plate 14 passing between the two L-shaped plates 12 of adjacent heat sinks 10 and the vertical section of the T-shaped plate 14 sliding in engagement with the mounting slots 13. On the one hand, this allows for flexible adjustment of the length of the heat sinks 10, enabling the number of heat sinks 10 to be increased or decreased according to actual heat dissipation needs, adapting to different scenarios; on the other hand, it facilitates assembly and disassembly, making production convenient. At the same time, the overall structure formed by splicing several heat sinks 10 can collaboratively expand the heat dissipation area through the heat sinks 111 in the mounting frame 11, resulting in high heat dissipation efficiency.

[0028] During installation, two horizontally arranged support plates 15 are spaced apart along the height of the mounting frame 11 on the side away from the L-shaped plate 12. The two support plates 15 are located on the upper and lower sides of the T-shaped plate 14, respectively. When connected, the support plates 15 abut against the vertical section of the L-shaped plate 12 on the adjacent heat sink 10. This provides additional support points for the connection of adjacent heat sinks 10. It can effectively distribute the force at the connection point and prevent the sliding fit structure between the T-shaped plate 14 and the mounting groove 13 from deforming or loosening due to long-term stress or vibration. This enhances the overall stability and structural strength of the heat sink 10 connection, ensuring that the heat sinks 10 maintain a stable relative position after splicing, and ensuring consistent heat dissipation. At the same time, a locking block 16 is provided on the side of the support plate 15 away from the mounting frame 11. A locking groove 17 adapted to the locking block 16 is opened on the vertical section of the L-shaped plate 12. When connected, the locking block 16 engages with the locking groove 17 of the adjacent heat sink 10. Furthermore, a snap-fit ​​structure is used to lock adjacent heat sinks 10, making the overall structure of the heat sink 10 more stable and reliable, and improving the product's durability under complex working conditions. The spacing between the vertical sections of the two L-shaped plates 12 is consistent with the thickness of the horizontal section of the T-shaped plate 14. This achieves a proper fit between the T-shaped plate 14 and the L-shaped plate 12. Eliminating the gap between the horizontal section of the T-shaped plate 14 and the vertical section of the L-shaped plate 12 makes the entire structure of the heat sink 10 more regular.

[0029] In the specific configuration, two protruding strips 18 are provided on each side of the horizontal section of the T-shaped plate 14. The two protruding strips 18 on the same side are arranged at intervals in the horizontal direction. The two adjacent sides of the two protruding strips 18 and the surface of the T-shaped plate 14 form a receiving groove. During connection, the vertical end of the L-shaped plate 12 engages with the receiving groove on the adjacent heat sink 10. The connection between the T-shaped plate 14 and the L-shaped plate 12 is fixed twice, enhancing the connection's firmness. At the same time, the engagement between the protruding strips 18 and the L-shaped plate 12 also plays an auxiliary positioning role, simplifying the assembly process and improving production efficiency. The mounting frame 11 has retaining strips 19 on its two sides perpendicular to the sides where the L-shaped plate 12 and the T-shaped plate 14 are located. The length direction of the retaining strips 19 is perpendicular to the length direction of the mounting frame 11.

[0030] like Figure 4-5As shown, another aspect of this utility model provides a PTC heater, including a heating core 20 and the aforementioned heat dissipation structure. Two sets of heat dissipation components 10 are respectively disposed on both sides of the heating core 20. The heat dissipation components 10 and the heating core 20 are fixedly connected by conductive adhesive, which also provides electrical connection between the heat dissipation components 10 and the heating core 20. After connection, the positions of the heat dissipation components 10 in the heat dissipation structure are also fixed. This achieves the integration of heat dissipation and conductivity. The heat dissipation components 10 on both sides can simultaneously dissipate heat from the heating core 20 bidirectionally, significantly expanding the heat dissipation area and quickly removing the heat generated by the heating core 20, thereby improving the heat dissipation efficiency of the PTC heater. Furthermore, it simplifies the structure, reduces the number of parts, and simultaneously achieves reliable and stable electrical connections, reduces contact resistance, reduces power loss, and improves the overall energy efficiency of the heater.

[0031] The heating core 20 is composed of several ceramic heating elements 21, which are arranged sequentially along the layout direction of the heat sink 10. During installation, the ceramic heating elements 21 are located between the retaining strips 19 of two adjacent heat sinks 10. The retaining strips 19 limit and fix the ceramic heating elements 21. The retaining strips 19 can clearly define the assembly position of the heat sink 10 and the ceramic heating elements 21, preventing misalignment during assembly. By limiting the heating elements with the retaining strips 19, the stable installation of the heating core 20 is ensured.

[0032] A metal plate 30 is located on the side of the heat sink 10 away from the heating element 20, and a terminal block 31 is provided on the metal plate 30. The terminal block 31 provides a convenient external electrical connection interface for the PTC heater. The standardized design of the terminal block 31 also improves the versatility and convenience of connecting the heater to external devices, reducing installation and maintenance costs. The metal plate 30 is fixedly connected to the heat sink 10 by conductive adhesive or welding. The conductive adhesive connection method is convenient to install and ensures good conductivity. The welding connection can achieve a firm fixation between the metal plate 30 and the heat sink 10, with higher connection strength and more stable conductivity, suitable for scenarios with higher requirements for connection reliability. A housing is fixedly fitted on the outside of both heat sink components.

[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A heat dissipation structure, characterized in that: The device includes several heat sinks (10) connected end to end. Each heat sink (10) includes a mounting frame (11). Several heat sinks (111) are spaced apart inside the mounting frame (11). Two L-shaped plates (12) are symmetrically arranged on one side of the mounting frame (11). The inner side of the horizontal section of the L-shaped plate (12) is provided with a mounting groove (13). A T-shaped plate (14) is provided on the side of the mounting frame (11) away from the L-shaped plate (12). The horizontal section of the T-shaped plate (14) passes horizontally between the two L-shaped plates (12) on the adjacent heat sink (10). The upper and lower ends of the vertical section of the T-shaped plate (14) are respectively slidably engaged with the two mounting grooves (13) of the adjacent heat sink (10).

2. The heat dissipation structure according to claim 1, characterized in that: The mounting frame (11) has two horizontally arranged support plates (15) spaced apart along its height direction on the side away from the L-shaped plate (12). When connected, the support plates (15) abut against the vertical section of the L-shaped plate (12) on the adjacent heat sink (10).

3. The heat dissipation structure according to claim 2, characterized in that: The support plate (15) is provided with a locking block (16) on the side away from the mounting frame (11). The vertical section of the L-shaped plate (12) is provided with a slot (17) that matches the locking block (16). When connected, the locking block (16) engages with the slot (17) of the adjacent heat sink (10).

4. The heat dissipation structure according to claim 1, characterized in that: The distance between the vertical sections of the two L-shaped plates (12) is consistent with the thickness of the horizontal section of the T-shaped plate (14).

5. The heat dissipation structure according to claim 1, characterized in that: Two protrusions (18) are provided on each side of the horizontal section of the T-shaped plate (14). The two protrusions (18) on the same side are arranged at intervals in the horizontal direction. The two adjacent sides of the two protrusions (18) and the surface of the T-shaped plate (14) form a receiving groove. When connected, the end of the vertical section of the L-shaped plate (12) is engaged with the receiving groove on the adjacent heat sink (10).

6. The heat dissipation structure according to claim 1, characterized in that: The mounting frame (11) has two sides perpendicular to the sides where the L-shaped plate (12) and T-shaped plate (14) are located, and each side has a retaining strip (19). The length direction of the retaining strip (19) is perpendicular to the length direction of the mounting frame (11).

7. A PTC heater, characterized in that: It includes a heating core (20) and a heat sink (10) as described in any one of claims 1-6. There are two sets of heat sinks (10), which are respectively disposed on both sides of the heating core (20). The heat sinks (10) and the heating core (20) are fixedly connected by conductive adhesive.

8. A PTC heater according to claim 7, characterized in that: The heat sink (10) has a metal plate (30) on the side away from the heat-generating core (20), and the metal plate (30) has a wiring terminal (31).

9. A PTC heater according to claim 8, characterized in that: The metal sheet (30) and the heat sink (10) are fixedly connected by conductive adhesive or welding.

10. A PTC heater according to claim 7, characterized in that: The heating core (20) includes a plurality of ceramic heating elements (21) arranged along the arrangement direction of the heat sink (10), and the ceramic heating elements (21) are located between the retaining strips (19) of two adjacent heat sinks (10).

Images