A circumferential heating element and a manufacturing method thereof

Abstract

The present invention relates to a circumferential heating element and a method for manufacturing the same. A groove is provided on a heat-conducting tube and a conductive material is embedded in the groove, thereby increasing the contact area between the conductive material and the heat-conducting tube and improving the area of ​​heat conduction, thereby improving the thermal efficiency. The connection through the groove is more stable and reliable, thereby improving the reliability of the heating element and increasing the service life of the heating element.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic atomization equipment, and in particular to a circumferential heating element and a manufacturing method thereof. Background Art

[0002] The existing circumferential heating element achieves the purpose of heating by spraying or printing a conductive circuit of a certain resistance on the surface of a rigid insulating metal tube, and then turning on the power to convert electrical energy into thermal energy. Figure 7 In this structure, the conductive circuit of the circumferential heating element floats on the surface, and there is still a lot of room for improvement in thermal efficiency. Summary of the invention

[0003] In view of the above situation, it is necessary to propose a circumferential heating element with improved thermal efficiency and a manufacturing method thereof.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a circumferential heating element, comprising: a heat-conducting tube, on which a groove is provided; and a conductive material filled in the groove to form a conductive circuit.

[0005] Furthermore, the groove includes a main groove and a pin groove connected to the main groove, and the main groove extends on the heat pipe in a regular waveform.

[0006] Furthermore, the main groove extends in a rectangular wave shape.

[0007] Furthermore, the spacing between adjacent rectangles in the main groove extending in a rectangular wave shape is arranged according to a certain rule.

[0008] Furthermore, the spacings between adjacent rectangles in the main groove extending in a rectangular wave shape are equal.

[0009] Furthermore, there are a plurality of grooves, and the plurality of grooves are arranged in parallel along the circumferential direction.

[0010] Furthermore, an insulating layer is provided between the conductive material and the heat conducting pipe.

[0011] A method for manufacturing a circumferential heating element comprises the following steps: forming a groove on a heat-conducting tube, wherein the forming method includes but is not limited to surface engraving, laser, CNC processing, mechanical stamping or chemical etching; insulating the groove or the heat-conducting tube as a whole to form an insulating layer; filling the groove with a conductive material; and sintering the conductive material and the heat-conducting tube together.

[0012] Furthermore, the conductive material is in powder form and filled into the groove.

[0013] Furthermore, the conductive material is in a strip shape to fit the groove.

[0014] The beneficial effects of the present invention are as follows: by arranging grooves on the heat pipe and embedding the conductive material in the grooves, the contact area between the conductive material and the heat pipe is increased, the area of ​​heat conduction is increased, and thus the thermal efficiency is improved. The connection through the grooves is more stable and reliable, which also improves the reliability of the heating element and increases the service life of the heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a circumferential heating element according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic structural diagram of a heat-conducting pipe of a circumferential heating element according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of a conductive circuit of a circumferential heating element according to an embodiment of the present invention;

[0018] Figure 4 It is a schematic cross-sectional structure diagram of a circumferential heating element according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of a groove of a circumferential heating element according to an embodiment of the present invention;

[0020] Figure 6 is a schematic diagram of a circumferential heating element according to an embodiment of the present invention;

[0021] Figure 7 It is a schematic diagram of a circumferential heating element in the prior art.

[0022] Description of labels:

[0023] 100, heat pipe; 110, groove; 111, main groove; 112, pin groove; 200, conductive circuit;

[0024] 210, pin; DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the following is a further detailed description of a circumferential heating element and a manufacturing method thereof in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] Please refer to Figure 1-Figure 6 A circumferential heating element includes: a heat conducting pipe 100, on which a groove 110 is provided; and a conductive material filled in the groove 110 to form a conductive circuit 200.

[0027] By providing a groove 110 on the heat pipe 100 and embedding the conductive material in the groove 110, the contact area between the conductive material and the heat pipe 100 is increased, the heat conduction area is increased, and thus the thermal efficiency is improved. The connection through the groove 110 is more stable and reliable, which also improves the reliability of the heating element and increases the service life of the heating element.

[0028] Please refer to Figure 1-Figure 3 and Figure 5 The groove 110 includes a main groove 111 and a pin groove 112 connected to the main groove 111. The main groove 111 extends in a regular waveform on the heat pipe 100. The waveform is a waveform diagram, such as a sawtooth wave, a rectangular wave, a sine wave, a cosine wave, etc. The waveform pattern not only makes the pattern regular, the heat is more uniform, the appearance is beautiful, and the resistance value is also conveniently controlled.

[0029] Please refer to Figure 2 and Figure 3 The pin slot 112 is generally located at the end or side of the main slot 111 . The pin slot 112 is generally provided with two pins 210 corresponding to the two pins 210 of the conductive circuit 200 . Preferably, the two pin slots 112 are located at the same end of the heat pipe 100 .

[0030] Please refer to Figure 1-Figure 3 and Figure 5 , the main groove 111 extends in a rectangular wave shape. Preferably, the spacing between adjacent rectangles in the main groove 111 extending in a rectangular wave shape is set according to a certain rule. Simply, the spacing between adjacent rectangles in the main groove 111 extending in a rectangular wave shape is equal. That is, the main groove 111 is a periodic waveform, so that the resistance of the entire heating element can be uniform. Alternatively, as another embodiment of the present invention, the spacing between adjacent rectangles gradually increases or decreases along the axial direction, that is, the resistance will increase or decrease toward one end. The same is true for other waveforms such as sawtooth waves or triangle waves.

[0031] In particular, a plurality of grooves 110 are provided, and the plurality of grooves 110 are arranged in parallel along the circumferential direction. Generally, two grooves 110 are provided, and the two grooves 110 generally form a complementary relationship. For example, when the main grooves 111 of the two grooves 110 are both periodic waveforms, they are symmetrically arranged so that the resistance value is uniform; for example, when the resistance value of one conductive circuit 200 gradually increases downward, the resistance value of the other conductive circuit 200 gradually decreases downward.

[0032] In particular, an insulating layer is provided between the conductive material and the heat conducting pipe 100. The insulating layer can prevent the heat conducting pipe 100 from being charged, thereby preventing the charge from being conducted to the human mouth.

[0033] The present invention also provides a method for manufacturing a circumferential heating element, comprising the following steps: forming a groove 110 on a heat pipe 100, wherein the forming method includes but is not limited to surface engraving, laser, CNC (Computerized Numerical Control) processing, mechanical stamping or chemical etching; insulating the groove 110 or the heat pipe 100 as a whole to form an insulating layer; filling the groove 110 with a conductive material; and sintering the conductive material and the heat pipe 100 together.

[0034] Simply, the insulating layer can be formed by electroplating, coating, thermal spraying, spray welding, vapor deposition, etc.

[0035] In particular, after the conductive material and the heat pipe 100 are sintered and formed, an insulating wrapping layer can be provided outside, the insulating wrapping layer wraps the heat pipe 100 and the conductive line 200, and can cover the outer circumferential wall and the inner circumferential wall of the heat pipe 100 as required, and the insulating wrapping layer can also be formed by electroplating, coating, thermal spraying, spray welding, vapor deposition, etc., and the insulating wrapping layer can not only increase the safety performance but also protect the conductive material. Generally, the pin 210 is exposed to facilitate welding of the wire.

[0036] In particular, the conductive material is filled into the groove 110 in powder form. The powder form allows the conductive material to be in close contact with the heat pipe 100, thereby improving thermal efficiency. That is, the conductive material in powder form is filled into the groove 110, and then connected to the heat pipe 100 as a whole by sintering. Alternatively, as another embodiment of the present invention, the conductive material is in a strip shape that fits the groove 110. That is, the strip-shaped conductive material is embedded in the groove 110 and then fixed by sintering.

[0037] It is understandable that the conductive material includes but is not limited to metals, alloys, composite materials, structural polymer conductive materials, etc., such as conventional copper, silver, aluminum alloys, etc., which can be selected according to specific needs.

[0038] In particular, the two pins 210 of the conductive circuit 200 can be made of materials with better conductivity, such as silver, copper or alloys thereof. That is, the conductive material in the pin slot 112 can be different from the conductive material in the main slot 111. Preferably, the conductive property of the conductive material in the pin slot 112 is better than that of the conductive material in the main slot 111.

[0039] It is understandable that the groove 110 is generally arranged on the outer peripheral wall of the heat pipe 100, and can also be arranged on the inner peripheral wall as required, and the specific selection is based on the requirements. When arranged on the inner peripheral wall, an insulating wrapping layer is generally required to be arranged on the inner peripheral wall.

[0040] In summary, the present invention provides a circumferential heating element and a manufacturing method thereof, by setting a groove on the heat pipe 100 and embedding the conductive material in the groove, so that the contact area between the conductive material and the heat pipe 100 is increased, and the heat conduction area is increased, thereby improving the thermal efficiency, and the connection through the groove is more stable and reliable, which also improves the reliability of the heating element and increases the service life of the heating element.

[0041] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A circumferential heating element, characterized in that: include: A heat conducting pipe, wherein a groove is provided on the heat conducting pipe; Conductive material is filled in the groove to form a conductive circuit; An insulating layer is provided between the conductive material and the heat conducting pipe; The groove comprises a main groove and a pin groove connected to the main groove, and the main groove extends on the heat pipe in a regular wave shape; There are a plurality of grooves, and the plurality of grooves are arranged in parallel along the circumferential direction.

2. The circumferential heating element according to claim 1, characterized in that: The main groove extends in a rectangular wave shape.

3. The circumferential heating element according to claim 2, characterized in that: The spacing between adjacent rectangles in the main groove extending in a rectangular wave shape is arranged according to a certain rule.

4. The circumferential heating element according to claim 3, characterized in that: The distances between adjacent rectangles in the main groove extending in a rectangular wave shape are equal.

5. A method for manufacturing a circumferential heating element, characterized in that: The following steps are involved: Forming grooves on the heat pipe, the forming methods including but not limited to surface engraving, laser, CNC processing, mechanical stamping or chemical etching; Perform insulation treatment on the groove or the entire heat conducting pipe to form an insulation layer; filling the groove with a conductive material; The conductive material and the heat pipe are sintered together.

6. The method for manufacturing a circumferential heating element according to claim 5, characterized in that: The conductive material is in powder form and filled into the groove.

7. The method for manufacturing a circumferential heating element according to claim 6, characterized in that: The conductive material is in a strip shape and is adapted to the groove.

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