WO2021142939A1

WO2021142939A1 - Stereoscopic heating element and heating-not-burning cigarette smoking set comprising same

Info

Publication number: WO2021142939A1
Application number: PCT/CN2020/081124
Authority: WO
Inventors: 张霞; 李寿波; 李廷华; 尤俊衡; 洪鎏; 赵伟; 巩效伟; 韩熠; 朱东来; 陈永宽
Original assignee: 云南中烟工业有限责任公司
Priority date: 2020-01-14
Filing date: 2020-03-25
Publication date: 2021-07-22
Also published as: CN111109675A

Abstract

Disclosed is a stereoscopic heating element, comprising: at least three substrates (1); a conductive trace layer (2) located on the substrates (1); and a lead terminal (3) electrically connected to the conductive trace layer (2). Further provided is a heating-not-burning cigarette smoking set having the heating element. According to the heating element, 3D stereoscopic circuit technology is used on the substrates (1) to print the conductive trace layer (2). The stereoscopic heating element solves the problems in the prior art of a single heating dimension, non-uniform local heating, a slow thermal response, long preheating times, being easy to break, etc. of one-piece heating elements. According to the heating element, the resistance of a heating circuit can be accurately set to achieve different toasting effects, the heated area of a cigarette core material is wide, and the amount of residues is reduced, and the heating element is also easy to clean.

Description

Three-dimensional heating element and heating non-combustion cigarette smoking set including the same

Technical field

The invention relates to the field of electric heating non-combustion cigarettes, in particular to a three-dimensional heating element and a heating non-combustion cigarette smoking set including the three-dimensional heating element.

Background technique

Electric heating non-combustible cigarette heating elements are used as the core components of the smoking set to heat the cigarettes to generate smoke and be inhaled by consumers. The current competitive products in the heat-not-burn cigarette market are mainly Philip Morris International’s central heat-not-burn cigarette iQOS, British American Tobacco’s Glo, Japan Tobacco International’s Ploom, and Korea Tobacco’s Lil. Among them, the product with the highest market share is Philip Morris International's central heating non-combustion cigarette iQOS, which has the most comprehensive intellectual property layout. Among them, the heating element of Philip Morris International's iQOS smoking set products is a ceramic sheet that is heated at the center. At present, ceramic heaters are widely used in heat-not-burn cigarettes. The ceramic heating plate is generally made of a zirconia ceramic substrate, and a thick metal film (silver paste or alloy paste) is printed on the surface and solidified by sintering. This heating element is fixedly installed on the PEEK high-temperature special plastic base and contacts with the cut tobacco, and plays the role of heating the cut tobacco after being energized. Its advantages are high reliability and stable input and output characteristics, but there are also problems such as single heating dimension, uneven local heating, slow thermal response, long preheating time, and easy fragmentation.

In order to solve the above problems, the present invention is proposed.

Summary of the invention

In order to solve the above-mentioned problems, the present invention provides a three-dimensional heating element that is different from the existing heating sheet to solve the problems of single heating dimension of the heating element in the current technology, uneven heating of the cigarette, slow thermal response speed, and easy fragmentation. .

The first aspect of the present invention provides a three-dimensional heating element, which includes: a substrate 1, which is at least three pieces; a conductive track layer 2, which is located on the substrate 1, and a lead terminal 3, which is connected to the conductive track Layer 2 is electrically connected.

Preferably, the conductive track layer 2 is wrapped with a protective layer 4.

Preferably, one end of the heating element is tapered, and the edge is chamfered so as to be inserted into the substance to be heated; the other end of the heating element is provided with a bump 6 outside the substrate 1 for fixing with the heating device.

Preferably, a plurality of the substrates 1 intersect, and the substrate 1 extends radially outward from the intersection, and the angle between two adjacent substrates 1 is the same.

Preferably, the heating element has a support plate 5 on the side close to the bump 6 to fix a plurality of the substrates 1.

Preferably, the substrate 1 is an electrically insulating substrate, the material of which is rigid, and the material of the substrate 1 is selected from one or more of glass, ceramic, anodized metal, coated metal, and polyimide. kind. The ceramic may include mica, alumina, or zirconia. Other suitable materials can also be used.

Preferably, the anodized metal refers to a metal that has been anodized on the surface and has an oxide film layer, including anodized aluminum, anodized titanium, anodized magnesium, or anodized zinc.

Preferably, the coated metal refers to a metal with a protective coating, including nickel-zinc plating, titanium-zinc plating, silver-gold plating, or copper-nickel plating.

Preferably, the material of the conductive track layer 2 is selected from one or more of silver, platinum, copper, nickel, tungsten and palladium.

Preferably, the conductive track layer 2 is arranged on a single side and/or multiple sides of the substrate 1 using 3D three-dimensional circuit technology, preferably a 3D printing technology or a laser printing technology.

Preferably, a protective layer 4 is plated on the conductive track layer 2 to ensure the stability of the heating element at high temperature (>800° C.), and the material of the protective layer 4 is selected from the protective paste of Heraeus.

The second aspect of the present invention provides a heat-not-burn cigarette smoking set including the heating element according to the first aspect of the present invention.

Compared with the prior art, the present invention has the following beneficial results:

1. The heating element of the present invention has changed from the original monolithic structure to the current three-dimensional cross structure, which enhances the rigidity and strength, reduces the possibility of the original ceramic heating piece fragile, and has a reliable structure and low damage rate.

2. The heating element of the present invention improves the heating element of a single substrate into a three-dimensional cross heating element containing three substrates, and then uses 3D three-dimensional circuit technology to arrange on one side and/or multiple sides of the substrate 1. On the side, the heating area is increased, the heating speed of the cigarette is further improved, and the preheating time of the cigarette in the existing electric heating non-burning cigarette product is shortened.

3. The heating element of the present invention adopts a three-dimensional structure, the heat energy is distributed symmetrically, and the heat radiation range is wider, realizes uniform heating in a limited space, and truly realizes uniform heating of cigarettes, which solves the problem of heating by the existing monolithic heating element The problem of single dimension and uneven local heating.

4. The heating element of the present invention can accurately set the heating circuit resistance to achieve different baking effects; the heating cigarette core material has a wide area, reduces residues, and is easy to clean.

Description of the drawings

Figure 1 Schematic diagram of the three-dimensional heating element structure of embodiment 1 of the invention

Fig. 2 Schematic diagram of the structure of the three-dimensional heating element in the second embodiment of the present invention

Fig. 3 Schematic diagram of the structure of the three-dimensional heating element in the second embodiment of the present invention

The names of the reference signs in the description of the drawings are: 1-substrate; 2-conducting track layer; 3-lead terminal; 4-protection layer; 5-support plate body; 6-bump.

Detailed ways

As described above, the present invention provides a three-dimensional structure heating element. The cigarette is inserted into the three-dimensional heating element, and the conductive track layer is connected with the positive and negative electrodes of the power supply through the lead end. The temperature of the heating element rises, and the cigarette is heated to generate smoke, which is inhaled by the smoker through the airflow channel.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Example one:

Referring to FIG. 1, a three-dimensional heating element includes: four substrates 1; a conductive trace layer 2 on the substrate 1; a lead terminal 3 which is electrically connected to the conductive trace layer 2. The conductive track layer 2 is wrapped with a protective layer 4. One end of the heating element is tapered, and the edge is chamfered so as to be inserted into the cigarette tobacco section; the other end of the heating element is provided with a bump 6 on the outside of the substrate 1 to be fixed to a heat-not-burn cigarette smoking set. The heating element has a support plate 5 on the side close to the bump 6 to fix a plurality of the substrates 1. Four of the substrates 1 intersect, and the substrates 1 extend radially outward from the intersection, and the angle between two adjacent substrates 1 is 90°.

In this embodiment, the four substrates 1 are made of alumina ceramic base.

In this embodiment, a 4-piece three-dimensional intersecting ceramic heating sheet is prepared by the moldless direct writing molding technology.

In this embodiment, the four heating sheets have a total of 8 surfaces, and the thermal conductive trace layer 2 can be printed on 4 or more surfaces of the substrate 1. The specific steps are to first design the circuit image on the ceramic substrate of the 3D structure, and then It is made with 3D three-dimensional circuit technology (ie, laser direct forming circuit technology).

The material of the conductive track layer 2 is selected from tungsten, the conductive track layer 2 is plated with a protective layer 4 to ensure the stability of the heating element at high temperatures (>800°C), and the material of the protective layer 4 is selected from He Li's protective paste.

In this embodiment, the four heating sheets have a total of 8 faces. Compared with a single structure photo, the three-dimensional heating element structure of the present invention enhances the rigidity and strength, the structure is more reliable, and the damage rate can be effectively reduced. At the same time, the heating surface of the core material of the cigarette is increased, the heating speed is further increased, the preheating time is shortened, and the full heating of the core material of the cigarette is realized. Reduce residue, easy to clean.

Embodiment two:

2 and 3, a three-dimensional heating element of the present invention includes: 6 substrates 1; a conductive track layer 2, which is located on the substrate 1; a lead terminal 3, which is connected to the conductive track Layer 2 is electrically connected. The conductive track layer 2 is wrapped with a protective layer 4. One end of the heating element is tapered, and the edge is chamfered so as to be inserted into the cigarette tobacco section; the other end of the heating element is provided with a bump 6 on the outside of the substrate 1 to be fixed to a heat-not-burn cigarette smoking set. The heating element has a support plate 5 on the side close to the bump 6 to fix a plurality of the substrates 1. The six substrates 1 intersect, and the substrates 1 extend radially outward from the intersection, and the angle between two adjacent substrates 1 is 60°.

In this embodiment, the material of the six substrates 1 is an alumina ceramic matrix.

In this embodiment, a 6-piece three-dimensional cross-section ceramic heating sheet is prepared by the moldless direct writing molding technology.

In this embodiment, the 6 heating sheets of the substrate 1 have a total of 12 surfaces, and the thermal conductive track layer 2 can be printed on 6 or more surfaces. The specific steps are to design the circuit image on the ceramic substrate first, and then use 3D stereo Circuit technology (ie, laser direct molding circuit technology) is made.

The material of the conductive track layer 2 is selected from palladium, the conductive track layer 2 is plated with a protective layer 4 to ensure the stability of the heating element at high temperatures (>800°C), and the material of the protective layer 4 is selected from He Li's protective paste.

In this embodiment, the 6 heating sheets have 12 faces in total. Compared with a single structure photo, the three-dimensional heating element structure of the present invention enhances the rigidity and strength, the structure is more reliable, and the damage rate can be effectively reduced. At the same time, the heating surface of the core material of the cigarette is increased, the heating speed is further increased, the preheating time is shortened, and the full heating of the core material of the cigarette is realized. Reduce residue, easy to clean.

The foregoing descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, without creative work, any modification, equivalent replacement and improvement made according to the technical solutions or technical features disclosed in the present invention should fall within the protection scope of the present invention.

Claims

A three-dimensional heating element, characterized in that it comprises:

Substrate (1), which is at least 3 pieces;

Conductive track layer (2), which is located on the substrate (1);

The lead terminal (3) is electrically connected with the conductive track layer (2).
The three-dimensional heating element according to claim 1, wherein a plurality of the substrates (1) intersect, and the substrates (1) extend radially outward from the intersection.
The three-dimensional heating element according to claim 1, wherein the conductive track layer (2) is wrapped with a protective layer (4).
The three-dimensional heating element according to claim 1, wherein one end of the heating element is tapered, and the edge is chamfered so as to be inserted into the substance to be heated; the substrate (1) at the other end of the heating element ) There are bumps (6) on the outside.
The three-dimensional heating element according to claim 1, wherein the heating element has a support plate (5) on the side close to the bump (6) to fix a plurality of the substrates (1) .
The three-dimensional heating element according to claim 1, wherein the substrate (1) is rigid, and the material of the substrate (1) is selected from the group consisting of glass, ceramic, anodized metal, coated metal and poly One or more of imides.
The three-dimensional heating element according to claim 1, wherein the material of the conductive track layer (2) is selected from one or more of silver, platinum, copper, nickel, tungsten and palladium.
The three-dimensional heating element according to claim 1, wherein the conductive track layer (2) is printed on one side and/or multiple sides of the substrate (1) by using 3D three-dimensional circuit technology.
The three-dimensional heating element according to claim 1, wherein the conductive track layer (2) is plated with a protective layer (4), and the material of the protective layer (4) is selected from the protective paste of Heraeus material.
A heat-not-burn cigarette smoking set comprising the heating element according to claim 1.