A PTC heater and its heat dissipation assembly

Abstract

This application belongs to the field of PTC heater technology and discloses a PTC heater and its heat dissipation assembly. The heat dissipation assembly includes several heat dissipation components connected end to end. Each heat dissipation component includes a connecting plate and side plates disposed on both sides of the connecting plate. A snap-fit ​​component is disposed on the side of the side plate away from the connecting plate, and a snap-fit ​​interface is opened on the side plate adjacent to the connecting plate. Corresponding snap-fit ​​interfaces are provided on both sides of the connecting plate, and through slots communicating with the corresponding snap-fit ​​interfaces are opened. The snap-fit ​​component passes through the through slots on adjacent heat dissipation components and engages with the corresponding snap-fit ​​interfaces. By designing several heat dissipation components with a uniform shape and using the snap-fit ​​component and snap-fit ​​interface to connect adjacent heat dissipation components, the heat dissipation components are evenly distributed, avoiding the uneven arrangement problem that is prone to occur when installing traditional wavy heat dissipation fins. At the same time, the standardized structure facilitates mass production and assembly, improving the overall stability and heat dissipation efficiency of the heat dissipation assembly.

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 assembly. 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 sandwich a corrugated heat sink fin. However, this structure is prone to deformation and positional deviations during installation due to the unique shape of the corrugated heat sink fin, leading to uneven deformation of the entire heat sink fin. This deformation problem disrupts the consistency of the heat dissipation surface, causing differences in heat dissipation efficiency in different areas of the PTC heater and affecting the overall uniformity of heat dissipation. Utility Model Content

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

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a heat dissipation component, comprising a plurality of heat dissipation components connected end to end, the heat dissipation component comprising a connecting plate and side plates disposed on both sides of the connecting plate, a snap-fit ​​component disposed on the side of the side plate away from the connecting plate, a snap-fit ​​interface disposed on the side plate adjacent to the connecting plate, through slots disposed on both sides of the connecting plate corresponding to the snap-fit ​​interface communicating with the corresponding snap-fit ​​interface, the snap-fit ​​component passing through the through slot on the adjacent heat dissipation component and snap-fitting with the corresponding snap-fit ​​interface.

[0006] By adopting the above technical solution, several heat sinks are designed with a consistent shape, and adjacent heat sinks are connected by snap-fit ​​components and snap-fit ​​interfaces. This ensures that the heat sinks are evenly distributed, avoiding the uneven arrangement problem that easily occurs when installing traditional wavy heat sinks. At the same time, the standardized structure facilitates mass production and assembly, improving the overall stability and heat dissipation efficiency of the heat dissipation components.

[0007] Furthermore, the snap-fit ​​component includes a snap-fit ​​plate connected to the side plate. The snap-fit ​​plate has bending plates bent inward on both sides. When connected, the bending plates pass through the through slots on the adjacent heat sink and then bend outward so that the angle between the bending plates and the snap-fit ​​plate is an obtuse angle.

[0008] By adopting the above technical solution, during assembly, the bent plate first passes through the through slot of the connecting card interface in a relatively vertical state, ensuring that the card plates of adjacent heat sinks can be smoothly inserted into the card interface to achieve initial docking. After docking, the bent plate is bent to form a locking structure, preventing the card plates from coming out of the card interface.

[0009] Furthermore, the bending plate is a right-angled trapezoid with its bottom edge coinciding with the edge of the snap-fit ​​plate. The height of the right-angled trapezoid is greater than the depth of the through groove. The side of the right-angled trapezoid away from the side plate is the hypotenuse. The distance between the hypotenuse and the snap-fit ​​plate decreases from the side plate away from the connecting plate.

[0010] By adopting the above technical solution, the height of the right trapezoid is greater than the depth of the through slot, making it less likely for the bent plate to retract and detach from the through slot after passing through the adjacent heat sink. The inclined side forms a guiding inclined structure, which guides the bent plate to pass through the through slot more easily and smoothly during the snap-fit ​​process of adjacent heat sinks, reducing assembly resistance and improving assembly convenience.

[0011] Furthermore, the thickness of the snap-fit ​​plate is the same as the thickness of the side plate, and the outer surface of the snap-fit ​​plate is coplanar with the outer surface of the side plate.

[0012] By adopting the above technical solution, the flatness of the outer surface of the heat dissipation component is ensured.

[0013] Furthermore, the length of the card interface is greater than the length of the card connector board.

[0014] By adopting the above technical solution, after the card plate is engaged with the card interface on the adjacent heat sink, there is still a certain amount of room for movement in the horizontal direction.

[0015] Furthermore, the width of the card interface is greater than the width of the card connector located within the card interface.

[0016] By adopting the above technical solution, after the snap-fit ​​plate is snapped into the snap-fit ​​interface on the adjacent heat sink, there is a certain swing space. Combined with the horizontal movement space, a certain relative angle can be formed between the two adjacent heat sinks, so that the entire heat sink assembly naturally presents an arc shape. This not only ensures the basic stability of the snap-fit ​​fit, but also provides flexible adjustment space for the arc shape of the heat sink assembly, meeting the structural adaptation requirements of the circular heater.

[0017] Furthermore, a limiting plate is provided protruding from the middle of the bottom of the through groove. The limiting plate divides the through groove into two U-shaped grooves for the bending plate to pass through. The distance between the top surface of the limiting plate and the outer surface of the corresponding side plate is greater than the thickness of the snap-fit ​​plate.

[0018] By adopting the above technical solution, a limiting plate is set, which corresponds to the snap-fit ​​plate of the adjacent heat sink, thereby restricting the movement of the snap-fit ​​plate and avoiding excessive vertical movement space between two adjacent heat sinks.

[0019] A second aspect of this application provides a PTC heater, including a heating core and the aforementioned heat dissipation assembly. The heat dissipation assembly consists of two sets, respectively disposed on both sides of the heating core, and the heat dissipation assembly and the heating core are fixedly connected by conductive adhesive.

[0020] By adopting the above technical solution and setting heat dissipation components on both sides of the heating core, the heat generated by the heating core can be quickly conducted and dissipated, ensuring the heat dissipation efficiency of the PTC heater and thus ensuring its stable operating temperature.

[0021] Furthermore, the heat dissipation component is provided with wiring terminals at its end.

[0022] By adopting the above technical solution, the wiring terminals facilitate the connection between the heating element in the PTC heater and the external circuit, simplifying the installation process.

[0023] Furthermore, the heating core includes a plurality of ceramic heating elements arranged along the length direction of the heat dissipation assembly.

[0024] By adopting the above technical solution, the ceramic heating element has the characteristics of uniform heating and good thermal stability. The vertical array arrangement can make the heat distribution more uniform, which facilitates the heat dissipation components to quickly dissipate heat and improve the heating efficiency and temperature uniformity of the PTC heater.

[0025] In summary, this utility model has the following beneficial effects: 1. In this application, by designing several heat sinks with a consistent shape and using the snap-fit ​​of the snap-fit ​​of the snap-fit ​​of the snap-fit ​​of the snap-fit ​​of the snap-fit ​​of the snap-fit ​​of the snap-fit ​​of the snap-fit, the heat sinks are evenly distributed, avoiding the problem of uneven arrangement that is easy to occur when installing traditional wave-shaped heat sinks. At the same time, the standardized structure facilitates mass production and assembly, and improves the overall stability and heat dissipation efficiency of the heat dissipation component. 2. In this application, during assembly, the bent plate is first passed through the through slot of the connecting card interface in a relatively vertical state to ensure that the card plates of adjacent heat sinks can be smoothly inserted into the card interface to achieve initial docking. After docking, the bent plate is bent to form a locking structure, preventing the card plates from coming out of the card interface. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the heat sink of this utility model; Figure 2 This is a schematic diagram of the structure of two adjacent heat sinks being snapped together according to this utility model; 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 5 This is an exploded view of the PTC heater of this utility model.

[0027] In the diagram: 10. Heat sink; 11. Connecting plate; 12. Side plate; 13. Snap-fit ​​component; 131. Snap-fit ​​plate; 132. Bending plate; 14. Snap-fit ​​interface; 15. Through slot; 16. Limiting plate; 20. Heating core; 21. Ceramic heating element; 30. Wiring terminal. Detailed Implementation

[0028] 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.

[0029] like Figure 1-3 As shown in the figure, this application discloses a heat dissipation assembly, including a plurality of heat dissipation components 10 connected end to end. Each heat dissipation component 10 includes a connecting plate 11 and side plates 12 disposed on both sides of the connecting plate 11. A snap-fit ​​component 13 is disposed on the side of the side plate 12 away from the connecting plate 11, and a snap-fit ​​interface 14 is provided on the side of the side plate 12 adjacent to the connecting plate 11. Corresponding to the snap-fit ​​interface 14, the connecting plate 11 has through slots 15 on both sides communicating with the corresponding snap-fit ​​interface 14. The snap-fit ​​component 13 passes through the through slot 15 on adjacent heat dissipation components 10 and snaps into the corresponding snap-fit ​​interface 14. By designing the plurality of heat dissipation components 10 with a uniform shape and using the snap-fit ​​of the snap-fit ​​component 13 and the snap-fit ​​interface 14 to connect adjacent heat dissipation components 10, the heat dissipation components 10 are evenly distributed, avoiding the uneven arrangement problem that easily occurs when installing traditional wavy heat sinks. At the same time, the standardized structure facilitates mass production and assembly, improving the overall stability and heat dissipation efficiency of the heat dissipation assembly.

[0030] Specifically, the snap-fit ​​pieces 13 on the two side plates 12 are symmetrically arranged. This allows for a more balanced force distribution when two adjacent heat sinks 10 are connected, thus ensuring the stability of the connection between adjacent heat sinks 10. The snap-fit ​​piece 13 includes a snap-fit ​​plate 131 connected to the side plate 12. The snap-fit ​​plate 131 has inwardly bent bending plates 132 on both sides. During connection, the bending plates 132 pass through the through slots 15 on the adjacent heat sinks 10 and then bend outwards, making the angle between the bending plates 132 and the snap-fit ​​plate 131 an obtuse angle. During assembly, the bending plates 132 first pass through the through slots 15 of the connecting snap-fit ​​interface 14 in a relatively vertical state, ensuring that the snap-fit ​​plates 131 of the adjacent heat sinks 10 can be smoothly inserted into the snap-fit ​​interface 14 to achieve initial docking. After docking, the bending plates 132 are bent to form a locking structure, preventing the snap-fit ​​plates 131 from dislodging from the snap-fit ​​interface 14.

[0031] During setup, the bending plate 132 is a right-angled trapezoid with its bottom edge coinciding with the edge of the snap-fit ​​plate 131. The height of the right-angled trapezoid is greater than the depth of the through groove 15, making it less likely for the bending plate 132 to retract and detach from the through groove 15 after passing through the adjacent heat sink 10. The side of the right-angled trapezoid away from the side plate 12 is a sloping side, and the distance between the sloping side and the snap-fit ​​plate 131 decreases from the side plate 12 away from the connecting plate 11. The sloping side forms a guiding inclined structure, which guides the bending plate 132 to pass through the through groove 15 more easily and smoothly during the snap-fit ​​process of adjacent heat sinks 10, reducing assembly resistance and improving assembly convenience. A limiting plate 16 protrudes from the middle of the bottom of the through groove 15, dividing the through groove 15 into two U-shaped grooves for the bending plate 132 to pass through. The distance between the top surface of the limiting plate 16 and the outer surface of the corresponding side plate 12 is greater than the thickness of the snap-fit ​​plate 131. By adopting the above technical solution, a limiting plate 16 is set, which corresponds to the snap-fit ​​plate 131 of the adjacent heat sink 10, restricting the movement of the snap-fit ​​plate 131 and avoiding excessive vertical movement space between adjacent heat sinks 10. After the two adjacent heat sinks 10 are connected, the internal components of the heat sink 10 have less obstruction, resulting in lower wind resistance and ensuring smooth airflow.

[0032] In specific configuration, the thickness of the snap-fit ​​plate 131 is the same as that of the side plate 12, and the outer surface of the snap-fit ​​plate 131 is coplanar with the outer surface of the side plate 12, ensuring the flatness of the outer surface of the heat dissipation assembly. The length of the snap-fit ​​interface 14 is greater than the length of the snap-fit ​​plate 131. This allows for some horizontal movement after the snap-fit ​​plate 131 snaps into the snap-fit ​​interface 14 on the adjacent heat dissipation component 10. The width of the snap-fit ​​interface 14 is greater than the width of the snap-fit ​​component 13 within the snap-fit ​​interface 14. This allows for some swinging space after the snap-fit ​​plate 131 snaps into the snap-fit ​​interface 14 on the adjacent heat dissipation component 10. Combined with the horizontal movement space, this allows a certain relative angle to be formed between the two adjacent heat dissipation components 10, thus allowing the entire heat dissipation assembly to naturally present an arc shape. This ensures the basic stability of the snap-fit ​​engagement and provides flexible adjustment space for the arc shape of the heat dissipation assembly, meeting the structural adaptation requirements of the circular heater.

[0033] like Figure 4-5 As shown, another aspect of this utility model provides a PTC heater, including a heating element 20 and the aforementioned heat dissipation assembly. Two sets of heat dissipation assemblies are respectively disposed on both sides of the heating element 20. By providing heat dissipation assemblies on both sides of the heating element 20, the heat generated by the heating element 20 can be quickly conducted and dissipated, ensuring the heat dissipation efficiency of the PTC heater and thus ensuring its stable operating temperature. The heat dissipation assembly and the heating element 20 are fixedly connected by conductive adhesive. This ensures good electrical connection and thermal conductivity between the two, guaranteeing the stable operation of the PTC heater.

[0034] A terminal block 30 is provided at the end of the heat dissipation component. The heat dissipation component 10 is made of metal, and the terminal block 30 facilitates the connection between the heating core 20 in the PTC heater and the external circuit, simplifying the installation process. The heating core 20 includes several ceramic heating elements 21 arranged along the layout direction of the heat dissipation component. The ceramic heating elements 21 have the characteristics of uniform heating and good thermal stability. The vertical array arrangement can make the heat distribution more uniform, which facilitates the heat dissipation component to quickly dissipate heat and improve the heating efficiency and temperature uniformity of the PTC heater.

[0035] The above are merely preferred embodiments 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 within its protection scope. 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 its protection scope.

Claims

1. A heat dissipation component, characterized in that: The device includes several heat sinks (10) connected end to end. Each heat sink (10) includes a connecting plate (11) and side plates (12) on both sides of the connecting plate (11). A snap-fit ​​component (13) is provided on the side of the side plate (12) away from the connecting plate (11). A snap-fit ​​interface (14) is provided on the side of the side plate (12) near the connecting plate (11). A through slot (15) communicating with the corresponding snap-fit ​​interface (14) is provided on both sides of the connecting plate (11). The snap-fit ​​component (13) passes through the through slot (15) on the adjacent heat sink (10) and snaps into the corresponding snap-fit ​​interface (14).

2. The heat dissipation component according to claim 1, characterized in that: The snap-fit ​​component (13) includes a snap-fit ​​plate (131) connected to the side plate (12). The snap-fit ​​plate (131) has bending plates (132) bent inward on both sides. When connected, the bending plates (132) pass through the through slots (15) on the adjacent heat sink (10) and then bend outward so that the angle between the bending plates (132) and the snap-fit ​​plate (131) is an obtuse angle.

3. A heat dissipation component according to claim 2, characterized in that: The bending plate (132) is a right trapezoid with its bottom edge coinciding with the edge of the snap-fit ​​plate (131). The height of the right trapezoid is greater than the groove depth of the through groove (15). The side of the right trapezoid away from the side plate (12) is the hypotenuse. The distance between the hypotenuse and the snap-fit ​​plate (131) decreases from the side plate (12) away from the connecting plate (11).

4. A heat dissipation component according to claim 2, characterized in that: The thickness of the snap-fit ​​plate (131) is the same as the thickness of the side plate (12), and the outer surface of the snap-fit ​​plate (131) is coplanar with the outer surface of the side plate (12).

5. A heat dissipation component according to claim 2, characterized in that: The length of the card interface (14) is greater than the length of the card connector (131).

6. A heat dissipation component according to claim 2, characterized in that: The width of the card interface (14) is greater than the width of the card connector (13) located within the card interface (14).

7. A heat dissipation component according to claim 2, characterized in that: A limiting plate (16) is provided in the middle of the bottom of the through groove (15). The limiting plate (16) divides the through groove (15) into two U-shaped grooves through which the bending plate (132) passes. The distance between the top surface of the limiting plate (16) and the outer surface of the corresponding side plate (12) is greater than the thickness of the snap-fit ​​plate (131).

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

9. A PTC heater according to claim 8, characterized in that: The heat dissipation component is provided with a wiring terminal (30) at its end.

10. A PTC heater according to claim 8, characterized in that: The heating core (20) includes a plurality of ceramic heating elements (21) arranged along the length of the heat dissipation assembly.

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