Heating tube for an electrically heated smoking device

Abstract

The heating tube of the electric heating smoking device comprises a tube body and an electric heating element, the inner wall and the outer wall of the tube body are provided with ceramic coatings formed through AO / MAO / TECO treatment, the outer side of the tube body is further coated with a layer of high-temperature resistant solid paint, the electric heating element is fixed to the outer side of the tube body through the high-temperature resistant solid paint, and the electric heating element is covered between the tube body and the high-temperature resistant solid paint. The heating tube of the electric heating smoking device is simple in structure, the manufacturing process of the heating tube is greatly simplified, the production efficiency of the heating tube is greatly improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to electronic cigarettes, specifically to a heating element of an electric smoking device. Background Technology

[0002] The manufacturing process for heating elements in existing electronic cigarettes is complex, involving the fabrication of the heating element body, sintering of the inner ceramic substrate, printing of heating traces, coating of the inner insulating layer, coating of the outer cladding layer, or sintering of the outer ceramic substrate. Each part must be manufactured separately, and then assembled and sintered, resulting in a complex and costly production process. Summary of the Invention

[0003] The purpose of this invention is to provide a heating element for an electric heating smoke extraction device that has a simpler manufacturing process and lower cost.

[0004] To achieve the aforementioned objectives, the technical solution of this utility model is as follows: The heating element of the electric heating smoking device includes a tube body and an electric heating element. The inner and outer walls of the tube body have a ceramic coating formed by AO / MAO / TECO treatment. The outer side of the tube body is also coated with a layer of high-temperature resistant curing paint. The electric heating element is fixed to the outer side of the tube body by the high-temperature resistant curing paint, and the electric heating element is wrapped between the tube body and the high-temperature resistant curing paint.

[0005] Furthermore, the heating element is fixed around the tube body.

[0006] Furthermore, the heating element is a heating wire.

[0007] Furthermore, the heating wire is a mesh heating wire.

[0008] Furthermore, the high-temperature resistant curing paint is an organosilicon high-temperature resistant curing paint.

[0009] Furthermore, the material of the pipe body is valve metal or an alloy with valve metal as the main component.

[0010] Furthermore, the tube body is made of aluminum, aluminum alloy, titanium, or titanium alloy.

[0011] Furthermore, it also includes a thermocouple, which is fixed to the outside of the tube body by the high-temperature resistant curing paint, and the thermocouple is located between the tube body and the high-temperature resistant curing paint.

[0012] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This invention relates to a heating element for an electric heating smoke extraction device. The heating element has a simpler structure, significantly simplifying the manufacturing process, greatly improving production efficiency, and reducing production costs. The heating element's body is treated with AO / MAO / TECO, resulting in a one-piece molding process for both the inner and outer ceramic layers. The inner ceramic layer serves as a high-emissivity ceramic layer, while the outer ceramic layer acts as an insulating layer and also as a base for the high-temperature curing varnish to adhere to the body. The high-temperature curing varnish covering the outer surface of the body fixes the heating element to the outer periphery of the tube. Simultaneously, the high-temperature curing varnish also serves as an outer coating, providing insulation and protective insulation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the heating element in an embodiment of this utility model. Detailed Implementation Example

[0014] like Figure 1 As shown, the heating element of the electric smoking device includes a tube body 1 and a heating element 2. The heating element 2 is a mesh heating wire (made of nickel-chromium alloy or iron-chromium-aluminum alloy) surrounding the tube body 1. The inner wall of the tube body 1 has an inner ceramic layer 101, and the outer wall of the tube body 2 has an outer ceramic layer 102. The tube body 1 is made of aluminum alloy, and the inner ceramic layer 101 and the outer ceramic layer 102 of the tube body 1 are formed simultaneously in one step by the aluminum alloy tube body through AO / MAO / TECO (anodic oxidation, micro-arc oxidation, or thermoelectrochemical oxidation) treatment. The outer side of the tube body 1 is also coated with a layer of high-temperature resistant curing paint 3, and the heating element 2 is fixed to the outer side of the tube body 1 by the high-temperature resistant curing paint 3, with the heating element 2 covering the tube body 1 and the high-temperature resistant curing paint 3.

[0015] It also includes a thermocouple (not shown), which acts as a temperature sensor to monitor the temperature of the heating element. The thermocouple is fixed to the outside of the tube body 1 together with the heating element 2 using a high-temperature resistant curing varnish 3. Similarly, the thermocouple is also located between the tube body 1 and the high-temperature resistant curing varnish 3. In actual production, only one application of the high-temperature resistant curing varnish 3 is required. After heat curing (organic silicone high-temperature resistant varnish, brand HNSRAL, purchased online from Taobao, heat curing at 200-350℃ for 0.5-1h after application), the heating element 2 and the thermocouple can be fixed to the outside of the tube body 1 together.

[0016] The heating element in this embodiment has a simple structure and a greatly simplified manufacturing process, which can significantly improve the production efficiency and reduce the production cost. The heating element can be manufactured with only one AO / MAO / TECO treatment and one high-temperature curing coating and heat curing. After the heating element is treated with AO / MAO / TECO, a ceramic coating is simultaneously formed on both the inner and outer walls. The AO / MAO / TECO ceramic coating grows in situ on the valve metal (aluminum, magnesium, titanium, and their alloys) substrate, bonding tightly with it. It is not easily cracked or peeled off when heated and has certain insulation properties (e.g., for aluminum alloys, after TECO treatment, a 10-20μm thick ceramic coating has a voltage resistance of 100-200V). The MAO / TECO ceramic coating includes an inner dense layer and an outer loose porous layer; the outer loose porous layer helps to enhance the adhesion between the coating and the heating element.

[0017] In this embodiment, the heating element has an inner ceramic layer with high emissivity and an outer ceramic layer that forms an insulating layer to isolate the heating element from the metal tube body. It also serves as a substrate for the high-temperature curing varnish to adhere to the tube body. The high-temperature curing varnish covering the outside of the tube body fixes the heating element and thermocouple to the tube body. Simultaneously, the high-temperature curing varnish also serves as an outer covering layer for the tube body 1, providing insulation and protective insulation.

Claims

1. A heating element of an electric smoking device, characterized in that, It includes a tube body and an electric heating element. The inner and outer walls of the tube body have a ceramic coating formed by AO / MAO / TECO treatment. The outer side of the tube body is also coated with a layer of high-temperature resistant curing paint. The electric heating element is fixed to the outer side of the tube body by the high-temperature resistant curing paint, and the electric heating element is wrapped between the tube body and the high-temperature resistant curing paint.

2. The heating element of the electric smoking device according to claim 1, characterized in that, The heating element is fixed around the tube body.

3. The heating element of the electric smoking device according to claim 1, characterized in that, The heating element is a heating wire.

4. The heating element of the electric smoking device according to claim 3, characterized in that, The heating wire is a mesh heating wire.

5. The heating element of the electric smoking device according to claim 1, characterized in that, The high-temperature resistant curing paint is an organosilicon high-temperature resistant curing paint.

6. The heating element of the electric smoking device according to claim 1, characterized in that, The tube body is made of valve metal or an alloy with valve metal as the main component.

7. The heating element of the electric smoking device according to claim 6, characterized in that, The tube body is made of aluminum, aluminum alloy, titanium, or titanium alloy.

8. The heating element of the electric smoking device according to claim 1, characterized in that, It also includes a thermocouple, which is fixed to the outside of the tube body by the high-temperature resistant curing paint, and the thermocouple is located between the tube body and the high-temperature resistant curing paint.

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