Electromagnetic induction heating tube

Abstract

The utility model relates to the technical field of heating tubes, in particular to an electromagnetic induction heating tube, which comprises a ceramic tube body and magnetic induction metal arranged in the ceramic tube body, a first insulating layer, a resistance heating circuit layer, a second insulating layer, an electromagnetic coil and a third insulating layer are sequentially arranged on the outer surface of the ceramic tube body, and a bonding pad is arranged on the third insulating layer. The bonding pad is connected with a first lead, penetrates through the third insulating layer and is connected with the electromagnetic coil; according to the utility model, through a heating mode of combining electromagnetic induction and a heating circuit, efficient and uniform heat generation is realized, and the heat efficiency and the heating performance are improved; due to the arrangement of the multiple insulating layers, short circuit between the resistance heating circuit layer and the electromagnetic coil is effectively avoided, so that the circuit is protected, the safety and the stability of the product are enhanced, and the risk of electric leakage is reduced; in addition, due to the ingenious design of the bonding pad and the lead, connection between the electromagnetic coil and an external circuit is simplified, installation and maintenance are facilitated, and meanwhile connection reliability is improved.

Description

Technical Field

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

[0002] Electromagnetic induction heating tubes are widely used in many fields, especially in the heating field, such as heating products like tobacco or electronic cigarettes. Traditional heating tubes mostly adopt the method of resistance wire heating, which has problems such as low thermal efficiency, uneven heating, and short service life. In recent years, electromagnetic induction heating technology has gradually emerged. It makes the metal material generate heat by itself through the principle of electromagnetic induction, and has advantages such as high thermal efficiency, fast heating speed, and high safety. At present, there are also some products on the market that adopt the electromagnetic induction heating method, but most of them have problems with poor heating uniformity and stability. Summary of the Utility Model

[0003] To solve the above technical problems, the utility model provides an electromagnetic induction heating tube, which includes a ceramic tube body and a magnetic induction metal arranged inside the ceramic tube body. The outer surface of the ceramic tube body is sequentially provided with a first insulating layer, a resistance heating circuit layer, a second insulating layer, an electromagnetic coil, and a third insulating layer. A solder pad is arranged on the third insulating layer, and a first lead is connected to the solder pad. The solder pad passes through the third insulating layer and is connected to the electromagnetic coil.

[0004] In some possible embodiments, a through hole for the second lead to pass through is reserved on the second insulating layer, and one end of the second lead is connected to the resistance heating circuit layer.

[0005] In some possible embodiments, both the first lead and the second lead extend along the length direction of the ceramic tube body towards the bottom of the ceramic tube body.

[0006] In some possible embodiments, the electromagnetic coil is in a spiral shape and is formed on the second insulating layer by means of dispensing or printing or pad printing or spraying or decal or 3D printing.

[0007] In some possible embodiments, the electromagnetic coil is made of silver paste or silver palladium paste or silver platinum paste or silver ruthenium paste materials.

[0008] In some possible embodiments, the magnetic induction metal is in a sleeve shape with one end closed and is arranged on the inner wall of the bottom of the ceramic tube body.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0010] 1. Through the heating method combining electromagnetic induction and the heating circuit, efficient and uniform heat generation is achieved, improving the thermal efficiency and heating performance.

[0011] 2. The setting of the multi-layer insulating layer effectively avoids the short circuit between the resistance heating circuit layer and the electromagnetic coil, protects the circuit, enhances the safety and stability of the product, and reduces the risk of electric leakage.

[0012] 3. The ingenious design of the pads and leads simplifies the connection between the electromagnetic coil and the external circuit, facilitates installation and maintenance, and improves the reliability of the connection at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 It is a three-dimensional structure diagram of the electromagnetic induction heating tube provided by the embodiment of the present invention;

[0015] Figure 2 It is a cross-sectional structure diagram of the electromagnetic induction heating tube provided by the embodiment of the present invention;

[0016] Figure 3 For Figure 2 the enlarged schematic diagram at position A in

[0017] Reference numerals: ceramic tube body 1, magnetic induction metal 2, first insulating layer 3, resistance heating circuit layer 4, second insulating layer 5, electromagnetic coil 6, third insulating layer 7, first lead 9, second lead 10. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more.

[0020] Refer to Figures 1 to 3An electromagnetic induction heating tube as shown includes a ceramic tube body 1, and a magnetic induction metal 2 is arranged inside the ceramic tube body 1. A first insulating layer 3, a resistance heating circuit layer 4, a second insulating layer 5, an electromagnetic coil 6 and a third insulating layer 7 are sequentially arranged on the outer surface of the ceramic tube body 1 from inside to outside. A pad (not shown in the figure) is arranged on the third insulating layer 7, and a first lead 9 is connected to the pad. The pad passes through the third insulating layer 7 and is connected to the electromagnetic coil 6. In some other embodiments, the electromagnetic coil 6 can be in the inner layer and the resistance heating circuit layer 4 is correspondingly in the outer layer, that is, the outer surface of the ceramic tube body 1 is sequentially provided with a first insulating layer 3, an electromagnetic coil 6, a second insulating layer 5, a resistance heating circuit layer 4 and a third insulating layer 7 from inside to outside.

[0021] In practical applications, a product (such as a cigarette, etc.) is placed inside the ceramic tube body 1. When the electromagnetic coil 6 is powered on, an alternating magnetic field is generated, and the magnetic induction metal 2 generates an induced current and heats up under the action of the magnetic field. At the same time, the resistance heating circuit layer 4 also starts to work and generates heat. The two work together to generate a large amount of heat to heat the product. The multi-layer insulating layer effectively avoids short circuits between the resistance heating circuit layer and the electromagnetic coil, protects the circuit, and ensures the safety and stability of the product. Both the electromagnetic coil 6 and the resistance heating circuit layer 4 are connected to an external power supply to achieve the input of electric energy.

[0022] In some possible embodiments, a through hole for the second lead 10 to pass through is reserved on the second insulating layer 5, and one end of the second lead 10 is connected to the resistance heating circuit layer 4. Both the first lead 9 and the second lead 10 extend along the length direction of the ceramic tube body 1 towards the bottom of the ceramic tube body 1, which is convenient for connecting and assembling the heating tube with an external circuit.

[0023] In some possible embodiments, the electromagnetic coil 6 is spiral, and this structure can effectively enhance the uniformity and coverage of the magnetic field; the spiral electromagnetic coil 6 can be formed on the second insulating layer 5 through various processes, including but not limited to dispensing, printing, pad printing, spraying, decal or 3D printing, etc. Among them, the dispensing process can precisely control the dispensing amount and position of the glue, and is suitable for small-batch and high-precision production requirements; the printing process is suitable for large-scale production and can quickly print conductive materials on the surface of the insulating layer; the pad printing process can also achieve good pattern transfer on the surface of complex shapes; the spraying process can achieve uniform material coverage; the decal process is suitable for pre-formed patterns; 3D printing provides high flexibility and customization capabilities and can realize the rapid prototyping of complex structures. Through these diverse forming methods, the most suitable process can be selected according to specific production conditions and requirements to ensure the quality and performance of the electromagnetic coil, thereby improving the electromagnetic induction efficiency and heating effect.

[0024] Furthermore, the electromagnetic coil 6 is made of silver paste, silver-palladium paste, silver-platinum paste or silver-ruthenium paste materials, which have good electrical conductivity and high temperature resistance. Among them, the silver paste material has relatively low cost and good electrical conductivity, and is suitable for general heating requirements; the silver-palladium paste adds palladium elements on the basis of silver, improving the oxidation resistance and corrosion resistance of the material; the silver-platinum paste further enhances the high temperature stability and anti-aging performance of the material; the silver-ruthenium paste significantly improves the wear resistance and arc resistance of the material by adding ruthenium elements. The electromagnetic coil 6 made of these high-performance materials can effectively reduce resistance, reduce power loss, improve the efficiency of electromagnetic induction, ensure the stability and reliability of the heating tube during long-term operation, and extend the service life of the product.

[0025] In some possible embodiments, referring to Figure 2 As shown, the magnetic induction metal 2 is in the shape of a sleeve with one end closed. The magnetic induction metal 2 is inserted into the ceramic tube body 1, and a relatively closed heating space is formed inside the magnetic induction metal 2, which helps to reduce heat dissipation and improve thermal efficiency.

[0026] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An electromagnetic induction heating tube, characterized in that, It includes a ceramic tube body (1) and a magnetic induction metal (2) arranged inside the ceramic tube body (1). A first insulating layer (3), a resistance heating circuit layer (4), a second insulating layer (5), an electromagnetic coil (6) and a third insulating layer (7) are sequentially arranged on the outer surface of the ceramic tube body (1). A solder pad is arranged on the third insulating layer (7), and a first lead (9) is connected to the solder pad. The solder pad passes through the third insulating layer (7) and is connected to the electromagnetic coil (6).

2. An electromagnetic induction heating tube according to claim 1, characterized in that, A through hole for the second lead (10) to pass through is reserved on the second insulating layer (5), and one end of the second lead (10) is connected to the resistance heating circuit layer (4).

3. An electromagnetic induction heating tube according to claim 2, wherein Both the first lead (9) and the second lead (10) extend along the length direction of the ceramic tube body (1) towards the bottom of the ceramic tube body (1).

4. An electromagnetic induction heating tube according to claim 1, characterized in that, The electromagnetic coil (6) is in a spiral shape and is formed on the second insulating layer (5) by means of dispensing or printing or pad printing or spraying or decal or 3D printing.

5. An electromagnetic induction heating tube according to claim 4, characterized in that, The electromagnetic coil (6) is made of silver paste or silver palladium paste or silver platinum paste or silver ruthenium paste materials.

6. An electromagnetic induction heating tube according to claim 1, characterized in that, The magnetic induction metal (2) is in a sleeve shape with one end closed and is sleeved on the inner wall of the bottom of the ceramic tube body (1).

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