A glue-coated pressure-holding corrugated belt PTC heating component and its production and assembly method

Abstract

The present invention discloses a glue-coated and pressed corrugated belt PTC heating component and its production and assembly method. It includes an aluminum tube, a heating core and a heat sink fin; the flat surface of the aluminum tube has a side protruding from the flat surface, the side section is a C-shaped opening inward, and a groove is formed on the inner side thereof; the two side edges and the flat surface together constitute a mounting groove, the mounting groove is coated with adhesive, and the heat sink fin is bonded to the mounting groove; after installation, the side edges are tightly pressed on both sides of the heat sink fin. The advantages are: the aluminum tube has a C-shaped side edge and a groove formed on its inner side, so that the silicone will not flow out from the side but remain in the mounting groove, especially in the groove, so that the bonding layer between the heat sink fin and the aluminum tube is thicker and the bonding strength is higher; the heat sink fin is fixed by the combined action of bonding force and pressing force, and the sharp corners of the side edges are pressed into the interior of the heat sink fin and the recessed part of the root is limited from above, so as to further improve the installation accuracy of the heat sink fin and the bonding strength between the heat sink fin and the aluminum tube.

Description

Technical Field

[0001] The present invention relates to a PTC heater, specifically to a glue - sticking and pressing type corrugated - belt PTC heating assembly and its production and assembly method. Background Art

[0002] At present, more and more electrical appliances, new energy vehicles and other devices incorporate PTC heaters into their applications. Generally, a PTC heater is formed by alternately stacking a heating core and a heat - dissipating aluminum strip, or by combining a PTC heating core installed inside an aluminum tube and heat - dissipating fins installed on the outer wall of the aluminum tube to form a heating and heat - dissipating structure. However, for the latter, due to the lack of positioning of the heat - dissipating fins and the fact that the excess adhesive between the heat - dissipating fins and the aluminum tube will be extruded and flow out to both sides during assembly and cannot be retained, there are often problems such as loose connection and poor stability, resulting in insufficient bonding force between the heat - dissipating fins and the aluminum tube, and ultimately causing the heat - dissipating fins to fall off from the aluminum tube. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a glue - sticking and pressing type corrugated - belt PTC heating assembly with tight and convenient assembly, high positioning accuracy, high bonding strength and anti - overflow glue, and its production and assembly method.

[0004] To solve the above - mentioned technical problem, the glue - sticking and pressing type corrugated - belt PTC heating assembly of the present invention includes an aluminum tube, a heating core installed in the aluminum tube, and heat - dissipating fins installed on the flat surface of the aluminum tube; the flat surface of the aluminum tube has a side edge protruding from the flat surface, the cross - section of the side edge is a C - shape with an opening facing inwards, and a groove is formed on its inner side; the two side edges and the flat surface together form an installation groove for the heat - dissipating fins, the installation groove is coated with an adhesive, and the heat - dissipating fins are bonded to the installation groove through the adhesive; after installation, the side edges tightly press on both sides of the heat - dissipating fins.

[0005] The height of the side edge is 1 - 5 mm.

[0006] The top of the side edge has a sharp corner facing inwards.

[0007] The adhesive is silica gel.

[0008] The heat - dissipating fins are of a corrugated structure, and after stamping, the top surface forms a structure with a plurality of juxtaposed "艹" - shaped patterns.

[0009] The heat - dissipating fins are of a corrugated structure, and after stamping, the top surface forms a structure with a plurality of juxtaposed staggered and undulating rectangles.

[0010] A production and assembly method for a glue - sticking and pressing type corrugated - belt PTC heating assembly includes the following steps: A. Insert the heating core into the cavity of the aluminum tube, apply vertical extrusion to the aluminum tube, position the heating core, and ensure that the heating core and the aluminum tube are closely attached to improve the heat conduction efficiency; B. Applying silicone in the installation groove; C. Adhere and fix the heat dissipation fins in the mounting grooves; D. Powering the heating core to cure the silicone by its own heat; or curing the silicone by heating in a heating furnace; E. Apply pressure to the side edges to bend them inwards and tightly press the two sides of the heat dissipation fins.

[0011] In step E, during the pressing process, the sharp corner portion of the side edge is pressed into the interior of the heat dissipation fin, and the recessed portion at the root of the heat dissipation fin is limited from above.

[0012] The advantages of the present invention are: the aluminum tube has a C-shaped side and a groove formed on its inner side, so that the squeezed excess silicone will no longer flow out of the aluminum tube surface from the side of the heat sink fin but will be retained in the mounting groove, especially in the side groove, so that the bonding layer between the heat sink fin and the aluminum tube is thicker and the bonding strength is higher, while also providing additional bonding force between the two sides of the heat sink fin and the inner wall of the mounting groove; the heat of the heating core itself is used to solidify the silicone, with fewer steps and simple and convenient operation; the heat sink fin is an integrally stamped corrugated structure, which does not require welding or fixing by fixing parts, nor does it require surface anti-corrosion treatment, and is convenient to produce with a short cycle, low material loss, high pass rate, low cost, and high heat exchange efficiency; the heat sink fin is fixed by the combined action of the silicone bonding force and the side top pressure holding force, and the side sharp corners are pressed into the interior of the heat sink fin and the recessed portion at the root is limited from above, thereby further improving the installation accuracy of the heat sink fin and the bonding force between the heat sink fin and the aluminum tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A perspective view of the present invention; Figure 2 It is an enlarged view of the present invention; Figure 3 This is a cross-sectional view of the present invention after installation; Figure 4 It is an enlarged cross-sectional view after the present invention is installed. DETAILED DESCRIPTION

[0014] The following is a further detailed description of the adhesive-coated pressure-holding corrugated belt PTC heating component and its production and assembly method of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0015] As shown in the figure, the glue - sticking and pressing - type corrugated - belt PTC heating component of the present invention includes an aluminum tube 1, a heating core 2 installed in the aluminum tube 1, and heat - dissipating fins 3 installed on the flat surface of the aluminum tube 1; the flat surface of the aluminum tube 1 has a side edge 4 protruding from the flat surface, the cross - section of the side edge 4 is a C - shape with an opening inward, and a groove 6 is formed on its inner side; the height of the side edge 4 is 1 - 5 mm, and the top has a sharp angle facing inward; the two side edges 4 and the flat surface together form an installation groove 5 for the heat - dissipating fins 3, silicone is coated in the installation groove 5, and the heat - dissipating fins 3 are bonded to the installation groove 5 through the silicone; after installation, the side edge 4 tightly presses on both sides of the heat - dissipating fins 3.

[0016] The heat - dissipating fins 3 are of a corrugated structure, and after stamping, a structure with a top surface in the shape of multiple juxtaposed "艹" characters is formed. Or, as shown in the patent "A Heat - Exchanging Structure of a Heater (Patent No. CN221992057U)", a structure with a top surface in the shape of multiple juxtaposed staggered and undulating rectangles is formed after stamping.

[0017] A production and assembly method for a glue - sticking and pressing - type corrugated - belt PTC heating component includes the following steps: A. Insert the heating core 2 into the cavity of the aluminum tube 1, apply extrusion in the vertical direction to the aluminum tube 1 to position the heating core 2, and ensure that the heating core is in close contact with the aluminum tube to improve the heat - conduction efficiency; B. Coat silicone in the installation groove 5; C. Bond and fix the heat - dissipating fins 3 in the installation groove 5, so that the silicone evenly fills all the gaps formed between the heat - dissipating fins 3 and the installation groove 5; D. Energize the heating core 2, and use its self - heating to cure the silicone; or cure the silicone in a heating furnace; E. Apply pressure to the side edge 4 to make it bend inward and tightly press on both sides of the heat - dissipating fins. During the pressing process, the sharp - angle part of the side edge 4 can also be pressed into the interior of the heat - dissipating fins 3, and the sunken part at the root of the heat - dissipating fins 3 is limited from above, thereby improving the bonding strength between the heat - dissipating fins 3 and the aluminum tube 1.

[0018] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A glue-coated, pressure-held corrugated belt PTC heating component, comprising an aluminum tube (1), a heating core (2) installed in the aluminum tube (1), and a heat dissipation fin (3) installed on a flat surface of the aluminum tube (1), characterized in that: The flat surface of the aluminum tube (1) has side edges (4) protruding from the flat surface. The cross-section of the side edges (4) is C-shaped with an opening facing inwards, and a groove (6) is formed on the inner side thereof; the two side edges (4) and the flat surface together form a mounting groove (5) for the heat dissipation fin (3). An adhesive is applied to the mounting groove (5), and the heat dissipation fin (3) is adhered to the mounting groove (5) through the adhesive; after installation, the side edges (4) tightly press on both sides of the heat dissipation fin (3).

2. The adhesive-coated pressure-holding corrugated belt PTC heating component according to claim 1, characterized in that: The height of the side edge (4) is 1-5 mm.

3. The adhesive-coated pressure-holding corrugated belt PTC heating component according to claim 2, characterized in that: The top of the side edge (4) has a sharp angle facing inwards.

4. The adhesive-coated pressure-holding corrugated belt PTC heating component according to any one of claims 1, 2 or 3, characterized in that: The adhesive is silica gel.

5. The adhesive-coated pressure-holding corrugated belt PTC heating component according to claim 4, characterized in that: The heat dissipation fin (3) has a corrugated structure, and after stamping, a structure with a top surface in the shape of multiple juxtaposed "艹" characters is formed.

6. The adhesive-coated pressure-holding corrugated belt PTC heating component according to claim 4, characterized in that: The heat dissipation fin (3) has a corrugated structure, and after stamping, a structure with a top surface in the shape of multiple juxtaposed staggered and起伏 rectangles is formed.

7. A method for producing and assembling a glue-coated pressure-holding corrugated belt PTC heating component according to any one of claims 1 to 6, characterized in that: It includes the following steps: A. Insert the heating core (2) into the cavity of the aluminum tube (1), apply extrusion in the vertical direction to the aluminum tube (1), and position the heating core (2). B. Apply silica gel to the mounting groove (5). C. Adhere and fix the heat dissipation fin (3) in the mounting groove (5). D. Energize the heating core (2) to cure the silica gel by its own heat generation; or cure the silica gel in a heating furnace. E. Apply pressure to the side edge (4) to bend it inwards and tightly press on both sides of the heat dissipation fin (3).

8. The method for producing and assembling the adhesive-coated pressure-holding corrugated belt PTC heating component according to claim 7, characterized in that: In step E, during the pressing process, press the sharp angle part of the side edge (4) into the interior of the heat dissipation fin (3), and limit the concave part at the root of the heat dissipation fin (3) from above.

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