A heat-not-burn heat-generating member

Abstract

The utility model discloses a heating non -combustible heating element, include: stainless steel pipe spare, the outer surface of stainless steel pipe spare is equipped with by inside to outside in proper order set up insulating layer, heating circuit and first protective layer, the inner surface of stainless steel pipe spare is equipped with second protective layer, and heating circuit includes wire and a plurality of heating slurry circuit, and a plurality of heating slurry circuit follow the axial distribution of stainless steel pipe spare in proper order, and the both ends of heating slurry circuit are positive and negative respectively, and the one end of all heating slurry circuit is connected with each other through wire. Make the heat of heating slurry circuit direct transmission to the stainless steel pipe, and the heat that heating slurry circuit directly generates is more even, and the heat conduction speed of stainless steel pipe spare is fast and temperature is even, to make the stainless steel pipe spare even heating to cigarette, first protective layer and second protective layer play the protection effect of anti - oxidation, avoid the influence of resistance evenness after heating slurry and stainless steel pipe spare surface oxidation, guarantee heating even.

Description

Technical Field

[0001] This application relates to the field of smoking products technology, specifically to a heating element that does not burn. Background Technology

[0002] Heating elements that only heat without burning are usually made of metals such as nickel, iron-chromium-aluminum, and stainless steel.

[0003] Nickel-based heating wires have poor temperature stability, and their resistance increases significantly with rising temperatures. During heating, localized temperature fluctuations (such as uneven contact with tobacco) can cause abnormal changes in resistance, potentially leading to localized overheating (exceeding the design range of 300-400℃). This can cause the organic matter in the tobacco to decompose, producing a burnt taste and ruining the flavor. Nickel is also easily oxidized above 300℃, forming a NiO oxide layer on the surface. This layer has poor adhesion to the substrate and is prone to peeling off during repeated heating-cooling cycles. This results in the nickel wire becoming thinner, increasing resistance, and ultimately breaking due to structural fragility, leading to a short lifespan.

[0004] Heating wires made of iron-chromium-aluminum can withstand long-term operating temperatures above 1000℃, but they are quite brittle at room temperature. Especially during repeated heating and cooling cycles, the stress caused by thermal expansion and contraction can easily lead to cracking of the wire. It is also more prone to breakage when bending, vibrating, or inserting and removing tobacco cartridges, affecting the product's lifespan. Furthermore, the processing technology of iron-chromium-aluminum may cause local component segregation, resulting in inconsistent resistance in different parts of the heating wire. During operation, local overheating can easily occur, causing local overheating and decomposition of the tobacco, producing an irritating odor and affecting the taste.

[0005] When the heating wire made of stainless steel is heated to a temperature above 300℃, the base material (iron, nickel) will oxidize, causing the surface to turn black. The oxide layer increases and destabilizes the resistance of the heating wire, resulting in fluctuations in heating power and uneven volatilization of flue gas and flavor substances.

[0006] Therefore, when using metal materials such as nickel, iron-chromium-aluminum, and stainless steel as heating elements in heated non-combustible electronic cigarettes, unstable heating temperatures can occur, affecting the stability of the flavor of the electronic cigarette product. Utility Model Content

[0007] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a heating element that does not burn, and the technical solution adopted includes: A non-combustible heating element includes: a stainless steel pipe, wherein the outer surface of the stainless steel pipe is provided with an insulating layer, a heating circuit and a first protective layer arranged sequentially from the inside to the outside, and the inner surface of the stainless steel pipe is provided with a second protective layer; the heating circuit includes a conductor and multiple heating slurry circuits, the multiple heating slurry circuits are distributed sequentially at intervals along the axial direction of the stainless steel pipe, each heating slurry circuit is arranged along the circumference of the stainless steel pipe, the two ends of the heating slurry circuit are positive and negative respectively, and one end of all the heating slurry circuits are connected to each other through a conductor.

[0008] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the stainless steel pipe has an intermediate section at both ends and a connecting section at both ends of the intermediate section, the heating line is arranged on the intermediate section, and a disconnection part is provided between the two ends of the intermediate section and the connecting section.

[0009] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the disconnected part is in the shape of an arc.

[0010] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the heating slurry line is U-shaped, and the two sides of the heating slurry line corresponding to the stainless steel pipe are close to each other in the circumferential direction.

[0011] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a solder pad is provided on one end of the wire and each of the heating paste lines.

[0012] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: it further includes lead wires, and each of the pads is connected with a lead wire.

[0013] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the first protective layer and the second protective layer are anti-oxidation glaze layers.

[0014] The beneficial effects of this utility model are as follows: The heating circuit is printed with heating paste, the stainless steel pipe has uniform thermal conductivity and fast heat conduction speed, the heating paste circuit is directly printed on the stainless steel pipe, so that the heat generated by the heating paste circuit is directly transferred to the stainless steel pipe, the heat generated directly by the heating paste circuit is more uniform, avoiding excessive local heat concentration, the stainless steel pipe has fast heat conduction speed and uniform temperature, so that the stainless steel pipe heats the cigarette evenly. The first protective layer is set on the outer surface of the heating circuit, and the second protective layer is set on the inner surface of the stainless steel pipe, thereby providing an anti-oxidation protection for the heating paste and the stainless steel pipe, preventing the oxidation of the heating paste and the stainless steel pipe from affecting the resistance uniformity, and ensuring uniform heating. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the non-combustible heating element described in the embodiments of this application; Figure 2 This is a schematic diagram of the unfolded structure of the stainless steel pipe fitting described in the embodiment of this application; Figure 3 This is a cross-sectional view of the stainless steel pipe fitting described in the embodiment of this application. Detailed Implementation

[0016] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0017] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] Reference Figure 1-3This application proposes an embodiment of a non-combustible heating element, comprising: a stainless steel tube 10, wherein the outer surface of the stainless steel tube 10 is provided with an insulating layer 50, a heating circuit 20 and a first protective layer 30 arranged sequentially from the inside to the outside, and the inner surface of the stainless steel tube 10 is provided with a second protective layer 60; the heating circuit 20 includes a conductor 21 and a plurality of heating slurry circuits 22, the plurality of heating slurry circuits 22 being distributed sequentially at intervals along the axial direction of the stainless steel tube 10, each heating slurry circuit 22 being arranged circumferentially along the stainless steel tube 10, and the two ends of the heating slurry circuit 22 being positive and negative poles respectively, and one end of all the heating slurry circuits 22 being interconnected through the conductor 21.

[0021] The stainless steel pipe fitting 10 is provided with multiple heating slurry lines 22, which are distributed sequentially at intervals along the axial direction of the stainless steel pipe fitting 10, and generate heat sequentially along the axial direction of the stainless steel pipe fitting 10.

[0022] In this application, the heating circuit 20 is printed with heating paste. The stainless steel tube 10 has uniform thermal conductivity and fast heat conduction speed. The heating paste circuit 22 is directly printed on the stainless steel tube 10, so that the heat generated by the heating paste circuit is directly transferred to the stainless steel tube. The heat generated directly by the heating paste circuit 22 is more uniform, avoiding excessive local heat concentration. The stainless steel tube has fast heat conduction speed and uniform temperature, so that the stainless steel tube 10 heats the cigarette evenly. The first protective layer 30 is disposed on the outer surface of the heating circuit 20, and the second protective layer 60 is disposed on the inner surface of the stainless steel pipe 10, thereby providing an anti-oxidation protection effect for the heating paste and the stainless steel pipe 10, preventing the heating paste and the stainless steel pipe 10 from being oxidized and affecting the resistance uniformity, and ensuring uniform heating.

[0023] In this embodiment, the stainless steel pipe fitting 10 can be made of stainless steel such as 304 or 316.

[0024] Preferably, in this embodiment, the heating paste line 22 is U-shaped, and the heating paste lines 22 are close to each other on both sides of the stainless steel tube 10 in the circumferential direction, so that the multiple heating paste lines 22 on the surface of the stainless steel tube 10 cover a larger area, thereby reducing uneven heating from the source, increasing the contact area with the cigarette, making the tobacco shreds heat more evenly, reducing local temperature differences, and ensuring the taste.

[0025] In another embodiment, the heating paste line 22 may also be strip-shaped, and the strip-shaped heating paste line 22 is distributed along the circumference of the stainless steel pipe fitting 10. In another embodiment, the heating slurry line 22 can also be routed in a serpentine pattern.

[0026] In this application, the heating circuit 20 further includes a pad 40, and the wire 21 and one end of each heating paste circuit 22 are provided with a pad 40.

[0027] The solder pad 40 is used to solder leads, so that multiple leads of any polarity are connected to one end of multiple heating paste lines 22 respectively, and leads of the other polarity are connected to the conductor 21.

[0028] Preferably, the inner and outer walls of the stainless steel fitting 10 are further provided with a protective layer outside the protective layer 30. The protective layer protects the heating line 20 and the solder pad 40, thereby protecting the solder pad 40 and preventing the solder pad 40 and the lead wire from falling off the stainless steel fitting 10.

[0029] The first protective layer 30 and the second protective layer 60 are anti-oxidation glaze layers, which have anti-oxidation effect and prevent the solder pads 40 from falling off, while having a smooth surface and being easy to clean.

[0030] Preferably, the stainless steel pipe fitting 10 has an intermediate section at both ends and a connecting section at both ends of the intermediate section, the heating line 20 is disposed on the intermediate section, and a disconnection 70 is provided between the two ends of the intermediate section and the connecting section.

[0031] When the stainless steel fitting 10 is installed on an electronic cigarette product, the fixing part of the stainless steel fitting 10 is connected to the connecting section. The fixing part is usually made of plastic. When the heating element of the heated non-combustible device is working, the temperature of the stainless steel fitting 10 is relatively high. Therefore, in this embodiment, a disconnection part 70 is provided at both ends of the stainless steel fitting 10 near its end to reduce the heat conducted from the middle section to the two connecting sections. This helps to lower the temperature of the connecting sections and avoid problems such as deformation of the fixing part caused by excessively high temperature of the connecting sections.

[0032] Preferably, the disconnection portion 70 is arc-shaped, which minimizes the heat transfer from the intermediate section to the two connecting sections while ensuring a stable connection between the connecting section and the intermediate section.

[0033] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A heating element that does not burn, characterized in that, include: The stainless steel pipe fitting (10) has an insulating layer (50), a heating circuit (20) and a first protective layer (30) arranged sequentially from the inside to the outside on its outer surface. The stainless steel pipe fitting (10) has a second protective layer (60) arranged on its inner surface. The heating circuit (20) includes a conductor (21) and multiple heating paste circuits (22). The multiple heating paste circuits (22) are arranged sequentially and spaced apart along the axial direction of the stainless steel pipe fitting (10). Each heating paste circuit (22) is arranged circumferentially along the stainless steel pipe fitting (10). The two ends of the heating paste circuit (22) are positive and negative poles, respectively. One end of all the heating paste circuits (22) is connected to each other through the conductor (21).

2. The heating element that does not burn as claimed in claim 1, characterized in that, The stainless steel pipe fitting (10) has an intermediate section (11) at both ends and a connecting section (12) at both ends of the intermediate section (11). The heating circuit (20) is located on the intermediate section. There is a disconnection (70) between the two ends of the intermediate section (11) and the connecting section (12).

3. The heating element that does not burn according to claim 2, characterized in that, The disconnected portion (70) is arc-shaped.

4. The heating element that does not burn as claimed in claim 1, characterized in that, The heating slurry line (22) is U-shaped, and the heating slurry line (22) is close to each other on both sides of the stainless steel pipe fitting (10) in the circumferential direction.

5. The heating element that does not burn according to claim 1, characterized in that, Each of the conductors (21) and each of the heating paste lines (22) has a pad (40) at one end.

6. The heating element for non-combustible heating according to claim 5, characterized in that, It also includes leads, with each of the pads (40) having a lead connected to it.

7. The heating element for non-combustible heating according to claim 1, characterized in that, The first protective layer (30) and the second protective layer (60) are anti-oxidation glaze layers.

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