Integrated PTC heating tube

Abstract

The utility model discloses an integrated PTC heating tube, which comprises a PTC heating core body and an aluminum tube sleeved on the PTC heating core body, radiating fins are arranged on the aluminum tube, an attaching heat conduction cavity matched with the PTC heating core body is arranged on the inner wall of the aluminum tube, rectangular gaps are arranged at corners of two sides of the attaching heat conduction cavity, and the rectangular gaps are communicated with the radiating fins. And a V-shaped groove extending towards the inner side is formed between the upper rectangular gap and the lower rectangular gap of the attaching heat conduction cavity. The PTC heating core has the advantages that the aluminum pipe and the radiating fins form a whole through a special welding process, the two parts are made of aluminum alloy, and the welding surface is also made of aluminum alloy, so that the thermal resistance is greatly reduced, and the radiating effect of the PTC heating core can be greatly improved; a special deformation structure is designed on the aluminum pipe, and the aluminum pipe is extruded and deformed from the side face, so that the aluminum pipe can be effectively attached to the PTC heating core body.

Description

Technical Field

[0001] The utility model relates to the technical field of heating tubes, in particular to an integrated PTC heating tube. Background Art

[0002] Corrugated air-heating PTC heaters are widely used in home appliances, automobiles and other fields; continuously improving PTC heating efficiency, reducing weight and cost are the technical development directions in the industry.

[0003] Currently, the PTC heating tubes with heat sinks on the market are made of adhesive and fin-through structures. The heating tubes and heat sinks are connected together by silicone or mechanical means. There is a large thermal resistance on the connection surface, which has a great impact on the heat dissipation effect of the PTC heating core.

[0004] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content

[0005] In view of the problems in the related art, the present invention proposes an integrated PTC heating tube to overcome the above technical problems existing in the existing related art.

[0006] To this end, the specific technical solutions adopted in this utility model are as follows:

[0007] An integrated PTC heating tube comprises a PTC heating core and an aluminum tube sleeved on the PTC heating core, the aluminum tube being provided with a heat sink, the inner wall of the aluminum tube being provided with a heat-conducting cavity that matches the PTC heating core, rectangular gaps being provided at both side corners of the heat-conducting cavity, and a V-shaped groove extending inwardly is provided between the two rectangular gaps located above and below the heat-conducting cavity.

[0008] Preferably, the aluminum tube and the heat sink are welded into an integral structure to form a heating tube.

[0009] Preferably, the surface of the heat sink is provided with a composite flux, and the aluminum tube and the heat sink are both made of aluminum alloy.

[0010] Preferably, the aluminum tube is welded to the heat sink by brazing.

[0011] The beneficial effects of the present invention are as follows: the aluminum tube and the heat sink are formed into a whole through a special welding process. Since both components are made of aluminum alloy and the welding surface is also made of aluminum alloy, the thermal resistance is greatly reduced, which can greatly improve the heat dissipation effect of the PTC heating core; the aluminum tube is designed with a special deformation structure, which is squeezed and deformed from the side, so that the aluminum tube and the PTC heating core can be effectively fitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a structural schematic diagram of an integrated PTC heating tube according to an embodiment of the present utility model;

[0014] Figure 2 This is a partial side view of an aluminum tube in an integrated PTC heating tube according to an embodiment of the present utility model;

[0015] Figure 3 This is a side view of an aluminum tube in an integrated PTC heating tube according to an embodiment of the present utility model;

[0016] Figure 4 This is a schematic structural diagram of a heat sink in an integrated PTC heating tube according to an embodiment of the present utility model;

[0017] Figure 5 yes Figure 4 A local enlarged schematic diagram of point A in the middle.

[0018] In the picture:

[0019] 1. PTC heating core; 2. Aluminum tube; 3. Heat sink; 4. Fitting heat conduction cavity; 5. Rectangular gap; 6. V-shaped groove; 7. Composite flux. DETAILED DESCRIPTION

[0020] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0021] According to an embodiment of the present utility model, an integrated PTC heating tube is provided.

[0022] Embodiment 1;

[0023] like Figure 1-5As shown, the integrated PTC heating tube according to the embodiment of the present utility model includes a PTC heating core 1 and an aluminum tube 2 sleeved on the PTC heating core 1, the aluminum tube 2 is provided with a heat sink 3, and the inner wall of the aluminum tube 2 is provided with a fitting heat conduction cavity 4 matching the PTC heating core 1, and rectangular gaps 5 are provided at the two side corners of the fitting heat conduction cavity 4, and a V-shaped groove 6 extending inward is provided between the two rectangular gaps 5 located above and below the fitting heat conduction cavity 4.

[0024] Embodiment 2;

[0025] like Figure 1-5 As shown, the aluminum tube 2 and the heat sink 3 are welded into an integral structure to form a heating tube. A composite flux 7 is provided on the surface of the heat sink 3. The aluminum tube 2 and the heat sink 3 are both made of aluminum alloy. The aluminum tube 2 is welded to the heat sink 3 by brazing.

[0026] To sum up, with the help of the above-mentioned technical solution of the present invention, the aluminum tube 2 and the heat sink 3 are formed into a whole through a special welding process. Since both components are aluminum alloy and the welding surface is also aluminum alloy, the thermal resistance is greatly reduced, which can greatly improve the heat dissipation effect of the PTC heating core; the aluminum tube 2 is designed with a special deformation structure, which is squeezed and deformed from the side, so that the aluminum tube 2 and the PTC heating core 1 can be effectively fitted.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated PTC heating tube, characterized in that: The invention comprises a PTC heating core (1) and an aluminum tube (2) sleeved on the PTC heating core (1); a heat sink (3) is provided on the aluminum tube (2); a heat conducting cavity (4) matching the PTC heating core (1) is provided on the inner wall of the aluminum tube (2); rectangular gaps (5) are provided at both side corners of the heat conducting cavity (4); and a V-shaped groove (6) extending inward is provided between two rectangular gaps (5) located above and below the heat conducting cavity (4).

2. The integrated PTC heating tube according to claim 1, characterized in that: The aluminum tube (2) and the heat sink (3) are welded into an integrated structure to form a heating tube.

3. The integrated PTC heating tube according to claim 1, characterized in that: The surface of the heat sink (3) is provided with a composite flux (7), and the aluminum tube (2) and the heat sink (3) are both made of aluminum alloy.

4. The integrated PTC heating tube according to claim 1, characterized in that: The aluminum tube (2) is welded to the heat sink (3) by brazing.

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