Ceramic heating body with good sealing performance

Abstract

The utility model particularly relates to a ceramic heating element with good sealing performance, which comprises a heating element body, a rod tip and a glass ring, and is characterized in that the heating element body comprises a hollow ceramic rod body and a heating coating layer arranged at the periphery of the ceramic rod body; the rod tip comprises a tip part and an embedded part, the area of the rear end face of the tip part is larger than that of the front end face of the embedded part, and the embedded part is inserted into the front end of an inner cavity of the ceramic rod body. The periphery of the front end of the embedded part is sleeved with the glass ring, the front end and the rear end of the glass ring abut against the rear end face of the tip part and the front end face of the ceramic rod body respectively, and the inner ring face of the glass ring is attached to the peripheral face of the embedded part. According to the utility model, the glass ring is arranged between the ceramic rod body and the rod tip, so that the sealing performance of the joint of the rod tip and the heating body is ensured, tobacco tar is prevented from permeating into the ceramic heating body, and the service life of the ceramic heating body is effectively prolonged; the bonding strength of the rod tip and the heating body is obviously improved, and the overall structural strength of the ceramic heating body can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating elements, in particular to a ceramic heating element with good sealing performance. Background Art

[0002] The heating element is an important component of the heat-not-burn electronic cigarette. At present, ceramic heating elements have been widely used. Commonly used heating elements include heating sheets and heating rods. However, when the heating sheet is used in conjunction with the cigarette, additional fixtures are required, which makes the electronic cigarette structure complex and costly; the ceramic heating rod usually includes a rod body and a rod tip connected to the rod body. However, the existing ceramic heating elements often have poor sealing at the joint between the rod tip and the rod body, cracks in the joint seam, and serious penetration of smoke oil, which seriously affects the service life of the ceramic heating element. It is necessary to provide a ceramic heating element with good sealing and long service life. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a ceramic heating element with good sealing performance, which has a simple structure and a long service life.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a ceramic heating element with good sealing performance, comprising a heating element body, a rod tip and a glass ring, wherein the heating element body comprises a hollow ceramic rod body and a heating coating layer arranged on the outer periphery of the ceramic rod body; the rod tip comprises a tip portion and an embedded portion connected to the rear end face of the tip portion, the area of ​​the rear end face of the tip portion is larger than the area of ​​the front end face of the embedded portion, and the embedded portion is plugged into the front end of the inner cavity of the ceramic rod body;

[0005] The glass ring is sleeved on the outer periphery of the front end of the embedded part, the front and rear ends of the glass ring are respectively in contact with the rear end face of the tip and the front end face of the ceramic rod body, and the inner ring surface of the glass ring is in contact with the outer periphery of the embedded part.

[0006] Furthermore, the heating coating layer is sequentially arranged on the first insulating layer, the heating layer and the second insulating layer on the periphery of the ceramic rod from the inside to the outside.

[0007] Furthermore, the ceramic heating element also includes a flange and a lead wire. The flange is sleeved on the outer periphery of the rear end of the heating element body, and the lead wire is arranged on the flange and connected to the heating layer.

[0008] Furthermore, the ceramic rod body includes a front connecting section, a middle functional section and a rear connecting section which are connected in sequence, the first insulating layer, the heating layer and the second insulating layer are arranged in sequence on the periphery of the middle functional section from inside to outside, and the flange is sleeved on the periphery of the rear connecting section.

[0009] Furthermore, the heating layer is in the shape of strips that are repeatedly bent on the surface of the first insulating layer, and electrodes are provided at both ends of the heating layer. The two electrodes are located at the rear end of the heating element body and connected to the lead wire.

[0010] Furthermore, the number of the lead wires is at least two, and the front ends of the lead wires are welded to the rear ends of the flanges and are respectively connected to the corresponding electrodes.

[0011] Furthermore, the flange is provided with an avoidance hole, and the lead wire passes through the avoidance hole and is connected to the corresponding electrode.

[0012] Furthermore, the ceramic rod body is in the shape of a hollow tube, the tip portion is in the shape of a cone or a truncated cone, the glass ring is in the shape of a circular ring, and the outer diameter of the glass ring is greater than or equal to the outer diameter of the ceramic rod body.

[0013] Furthermore, the outer surfaces of the heating element body and the rod tip are provided with a glass glaze layer.

[0014] Furthermore, the ceramic rod body and the rod tip are made of zirconia ceramics, alumina ceramics or a mixture of zirconia and alumina.

[0015] The beneficial effects of the utility model are as follows: the utility model arranges a glass ring between the ceramic rod body and the rod tip, and the glass ring is sleeved on the embedded end of the rod tip, thereby realizing the encapsulation of the connection between the ceramic rod body and the rod tip, ensuring the sealing of the joint between the rod tip and the heating element body, preventing the smoke oil from penetrating into the interior of the ceramic heating element, and effectively extending the service life of the ceramic heating element. At the same time, the bonding strength between the rod tip and the heating element body is significantly improved, which can improve the overall structural strength of the ceramic heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the ceramic heating element of the utility model;

[0017] Figure 2 It is a schematic diagram of the exploded structure of the ceramic heating element of the utility model;

[0018] Figure 3 It is another schematic diagram of the exploded structure of the ceramic heating element of the utility model.

[0019] The accompanying drawings are marked as: 1. heating element body; 11. ceramic rod body; 111-front connecting section; 112-rear connecting section; 12. first insulating layer; 13. heating layer; 131. electrode; 14. second insulating layer; 15. glass glaze layer; 16. ceramic substrate; 2. rod tip; 21. tip part; 22. embedded part; 3. glass ring; 4. flange; 5. lead; 6. welding point. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0021] like Figure 1-3 As shown, a ceramic heating element with good sealing performance comprises a heating element body 1, a rod tip 2 and a glass ring 3, wherein the heating element body 1 comprises a hollow ceramic rod body 11 and a heating coating layer arranged on the periphery of the ceramic rod body 11; the rod tip 2 comprises a tip portion 21 and an embedded portion 22 connected to the rear end face of the tip portion 21, the longitudinal cross-sectional area of ​​the rear end of the tip portion 21 is larger than the longitudinal cross-sectional area of ​​the front end, the area of ​​the rear end face of the tip portion 21 is larger than the area of ​​the front end face of the embedded portion 22, and the embedded portion 22 is plugged into the front end of the inner cavity of the ceramic rod body 11;

[0022] The glass ring 3 is sleeved on the outer periphery of the front end of the embedded part 22, and the front and rear ends of the glass ring 3 are respectively abutted against the rear end surface of the tip part 21 and the front end surface of the ceramic rod body 11, and the inner ring surface of the glass ring 3 is in contact with the outer peripheral surface of the embedded part 22.

[0023] The utility model provides a glass ring 3 between the ceramic rod body 11 and the rod tip 2, and the glass ring 3 is sleeved on the embedded part 22 of the rod tip 2, thereby achieving the encapsulation of the connection between the ceramic rod body 11 and the rod tip 2, ensuring the sealing of the joint between the rod tip 2 and the heating element body 1, preventing the smoke oil from penetrating into the interior of the ceramic heating element, and effectively extending the service life of the ceramic heating element. At the same time, the bonding strength between the rod tip 2 and the heating element body is significantly improved, which can improve the overall structural strength of the ceramic heating element. When preparing the glass ring 3 described in this embodiment, it is heated and melted in a high-temperature sintering furnace, and then cooled and formed. The heating element body 1 and the rod tip 2 are high-temperature encapsulated by the glass ring 3, so as to achieve the bonding and sealing of the joint between the rod tip 2 and the heating element body 1.

[0024] Furthermore, the heating coating layer includes a first insulating layer 12, a heating layer 13, and a second insulating layer 14, which are sequentially arranged on the outer periphery of the ceramic rod body 11 from the inside to the outside. In this embodiment, the heating body 1 is composed of a self-rolled ceramic substrate 16, a first insulating layer 12 is arranged on the surface of the ceramic substrate 16, a heating layer 13 is arranged on the surface of the first insulating layer 12, and a second insulating layer 14 is arranged on the surface of the heating layer 13. The first insulating layer 12 is firmly connected to the ceramic substrate 16, and the first insulating layer 12 and the second insulating layer 14 can provide good protection for the heating layer 13. When preparing the heating body 1, the first insulating layer 12 is coated on the outer surface of the ceramic substrate 16, and then the heating layer 13 is printed on the outer surface of the first insulating layer 12, the heating layer 13 forms a heating circuit, and then the second insulating layer 14 is coated on the outer surface of the heating layer 13.

[0025] Furthermore, the ceramic heating element further comprises a flange 4 and a lead 5, wherein the flange 4 is sleeved on the outer periphery of the rear end of the heating element body 1, and the lead 5 is arranged on the flange 4 and connected to the heating layer 13. In this embodiment, the flange 4 is rectangular or substantially rectangular, and a through hole is provided in the middle for the ceramic rod 11 to pass through, and the ceramic rod 11 is fixed to the flange 4.

[0026] Furthermore, the heating layer 13 is in the shape of a strip that repeatedly twists and turns on the surface of the first insulating layer 12, and electrodes 131 are provided at both ends of the heating layer 13, and the two electrodes 131 are located at the rear end of the heating body 1 and connected to the lead 5. The number of the lead 5 is at least two, and the front ends of the plurality of lead 5 are welded to the rear end of the flange 4 and are respectively connected to the corresponding electrodes 131. The flange 4 is provided with an avoidance hole, and the lead 5 passes through the avoidance hole and is connected to the corresponding electrode 131. Due to the arrangement of the above structure, the lead 5 passes through the avoidance hole and is connected to the corresponding electrode 131, and the welding point 6 is formed at the welding point of the electrode 131 and the lead 5, and the connection is stable. The weld 6 can effectively protect the lead 5 and is highly practical; the heating layer 13 forms a heating circuit, which can achieve uniform heating of the ceramic heating element.

[0027] Furthermore, the ceramic rod body 11 includes a front connecting section 111, a middle functional section and a rear connecting section 112 which are connected in sequence, the first insulating layer 12, the heating layer 13 and the second insulating layer 14 are sequentially arranged on the periphery of the middle functional section from the inside to the outside, and the flange 4 is sleeved on the periphery of the rear connecting section 112. The first insulating layer 12, the heating layer 13 and the second insulating layer 14 are not arranged on the surface of the front connecting section 111 and the rear connecting section 112 of the ceramic rod body 11, so that the front connecting section 111 of the ceramic rod body 11 is tightly connected with the glass ring 3 and the rod tip 2, and the rear connecting section 112 of the ceramic rod body 11 is plugged and fixed to the flange 4, and the connection is stable.

[0028] Furthermore, the ceramic rod body 11 is in the shape of a hollow circular tube, the tip portion 21 is in the shape of a cone or a truncated cone, the glass ring 3 is in the shape of a circular ring, and the outer diameter of the glass ring 3 is greater than or equal to the outer diameter of the ceramic rod body 11. The glass ring 3 can be closely fitted with the ceramic rod body 11 and the rod tip 2, so as to achieve high-temperature packaging of the connection between the ceramic rod body 11 and the rod tip 2, ensure the sealing of the joint between the rod tip 2 and the heating body 1, and prevent the smoke oil from penetrating into the ceramic heating body.

[0029] Furthermore, the outer surfaces of the heating element body 1 and the rod tip 2 are provided with a glass glaze layer 15. In this embodiment, the outer surfaces of the ceramic rod body 11, the second insulating layer 14 and the rod tip 2 are coated with a glass glaze layer 15, which can provide good protection for the heating element body 1 and the rod tip 2 and improve their durability.

[0030] Furthermore, the ceramic rod body 11 and the rod tip 2 are made of zirconia ceramics, alumina ceramics or ceramics mixed with zirconia and alumina, which have good mechanical properties and high temperature resistance and are strong and durable.

[0031] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A ceramic heating element with good sealing performance, characterized in that: The heating element comprises a heating element body, a rod tip and a glass ring, wherein the heating element body comprises a hollow ceramic rod body and a heating coating layer arranged on the outer periphery of the ceramic rod body; the rod tip comprises a tip portion and an embedded portion connected to the rear end face of the tip portion, the area of ​​the rear end face of the tip portion is larger than the area of ​​the front end face of the embedded portion, and the embedded portion is plugged into the front end of the inner cavity of the ceramic rod body; The glass ring is sleeved on the outer periphery of the front end of the embedded part, the front and rear ends of the glass ring are respectively in contact with the rear end face of the tip and the front end face of the ceramic rod body, and the inner ring surface of the glass ring is in contact with the outer periphery of the embedded part.

2. The ceramic heating element with good sealing performance according to claim 1, characterized in that: The heating covering layer is sequentially arranged on the first insulating layer, the heating layer and the second insulating layer on the periphery of the ceramic rod from the inside to the outside.

3. The ceramic heating element with good sealing performance according to claim 2, characterized in that: The ceramic heating element further comprises a flange and a lead wire. The flange is sleeved on the outer periphery of the rear end of the heating element body, and the lead wire is arranged on the flange and connected to the heating layer.

4. The ceramic heating element with good sealing performance according to claim 3, characterized in that: The ceramic rod body includes a front connecting section, a middle functional section and a rear connecting section which are connected in sequence. The first insulating layer, the heating layer and the second insulating layer are arranged in sequence on the outer periphery of the middle functional section from the inside to the outside. The flange is sleeved on the outer periphery of the rear connecting section.

5. The ceramic heating element with good sealing performance according to claim 3, characterized in that: The heating layer is in the shape of a repeatedly zigzag strip, and electrodes are provided at both ends of the heating layer. The two electrodes are located at the rear end of the heating body and connected to the lead wire.

6. The ceramic heating element with good sealing performance according to claim 5, characterized in that: The number of the lead wires is at least two, and the front ends of the lead wires are welded to the rear ends of the flanges and are respectively connected to the corresponding electrodes.

7. The ceramic heating element with good sealing performance according to claim 6, characterized in that: The flange is provided with an avoidance hole, and the lead wire passes through the avoidance hole and is connected to the corresponding electrode.

8. The ceramic heating element with good sealing performance according to claim 3, characterized in that: The ceramic rod body is in the shape of a hollow circular tube, the tip portion is in the shape of a cone or a truncated cone, the glass ring is in the shape of a circular ring, and the outer diameter of the glass ring is greater than or equal to the outer diameter of the ceramic rod body.

9. The ceramic heating element with good sealing performance according to claim 1, characterized in that: The outer surfaces of the heating element body and the rod tip are provided with a glass glaze layer.

10. The ceramic heating element with good sealing performance according to claim 1, characterized in that: The ceramic rod body and the rod tip are made of zirconium oxide ceramics, aluminum oxide ceramics or ceramics mixed with zirconium oxide and aluminum oxide.

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