CN219613086U

CN219613086U - Heating element assembly

Info

Publication number: CN219613086U
Application number: CN202320900108.0U
Authority: CN
Inventors: 李斌
Original assignee: China Tobacco Henan Industrial Co Ltd; Zhengzhou Tobacco Research Institute of CNTC
Current assignee: China Tobacco Henan Industrial Co Ltd; Zhengzhou Tobacco Research Institute of CNTC
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-09-01
Anticipated expiration: 2033-04-20

Abstract

The utility model belongs to the field of heating devices, and particularly relates to a heating element assembly and an aerosol generating device. The heating element assembly includes: two or more heating units arranged side by side; the center of the heating body component is provided with an aerosol generating product accommodating cavity; two or more heat generating units are arranged around the aerosol-generating article receiving cavity and are insulated from each other. The circumferential heating element assembly can achieve the effect of circumferential segmented heating of the aerosol generating product by controlling the starting and closing time of each heating unit, so that the aerosol can be released more uniformly in the whole suction period of the aerosol generating product. This can solve the problem of insufficient smoke levels in conventional aerosol-generating articles during the later stages of extraction.

Description

Heating element assembly

Technical Field

The utility model belongs to the field of heating devices, and particularly relates to a heating element assembly and an aerosol generating device.

Background

The heating elements of the existing aerosol generating device are mainly divided into a central heating mode and a circumferential heating mode. The heating element in the form of central heating generally has good taste, but the carbonization rate of the tobacco core is low, and the tobacco is not fully utilized. The heating element in the circumferential form has high carbonization rate of the tobacco core, but has large volume, low heating speed and complex production process, and is only suitable for fine cigarettes. The existing circumferential heating element only has an upper and lower sectional heating control mode, so that the production of the heating element and aerosol generating products is complex. The aerosol-generating article and the aerosol-generating device are bulky and inconvenient for the consumer to use and carry.

The present utility model has been made to solve the above problems.

Disclosure of Invention

A first aspect of the present utility model provides a heat generating body assembly comprising: two or more heating units arranged side by side;

the center of the heating body component is provided with an aerosol generating product accommodating cavity;

two or more heat generating units are arranged around the aerosol-generating article receiving cavity and are insulated from each other.

Preferably, the two or more heating units are combined to form a hollow columnar structure;

or the heating body component comprises a heating unit fixing piece, a heating unit installation position is arranged on the heating unit fixing piece, and the heating unit is arranged in the heating unit installation position and is combined with the heating unit fixing piece together to form a hollow columnar structure;

or the heating body component comprises a heating unit fixing piece with a hollow columnar structure, and the heating unit is arranged in the side wall of the heating unit fixing piece or a groove on the side wall.

The hollow part of the hollow columnar structure is the accommodating cavity of the aerosol generating product.

The utility model comprises the following scheme:

in the first scheme, two or more than two heating units are combined to form a hollow columnar structure, and the heating units can be fixed by means of high-temperature-resistant insulating glue and the like. In the first scheme, a heating unit fixing piece is not needed.

And in the second scheme, the heating body component comprises a heating unit fixing piece, and two or more heating units and the heating unit fixing piece are combined together to form a hollow columnar structure. And a heating unit installation position is arranged on the heating unit fixing piece. The heating unit fixing piece is used for supporting and fixing the heating unit.

The third scheme is that the heating body component comprises a heating unit fixing piece with a hollow columnar structure, and the heating unit is arranged on the inner wall surface or the outer wall surface of the heating unit fixing piece in a bonding, clamping and other modes.

The fourth proposal is that the heating body component comprises a heating unit fixing piece with a hollow columnar structure, and the inner wall of the heating unit fixing piece is provided with a groove. The heating unit is arranged in the groove in a bonding, clamping and other modes.

Preferably, the columnar structure is a cylindrical structure. Of course, the columnar structure may also be chosen to fit an aerosol-generating article of the same shape, such as a cuboid.

Preferably, the heat generating unit is selected from: one or more of heating sheet, heating net or heating wire.

Preferably, a smooth protective layer is arranged on the heating unit to prevent tar residue from corroding the heating unit.

More preferably, the protective layer is an insulating protective layer.

Preferably, the heat generating body assembly further comprises: a plurality of pairs of wires; which is used to connect each heating unit with an external circuit.

Preferably, each heating unit is individually connected to an external circuit by means of said wires. The external circuit can independently start each heating unit to heat so as to realize independent control of each heating unit.

Of course, the external circuit can also realize common procedural control of two or more heating units through a certain procedure. For example, two or more heat generating units are sequentially activated according to a certain program.

Preferably, the heat generating unit fixing member is a bracket, and the heat generating units are spaced apart from each other by a spacing section of the bracket so as to reduce heat transferred between the heat generating units.

More preferably, the ratio of the circumferential edge length of the spacer of the bracket to the circumferential edge length of the heat generating unit is 0.1 to 10.

Preferably, the heat generating units are identical or different in shape from each other.

More preferably, the heat generating units are arc-shaped sheet structures identical to or different from each other.

The particular shape of the arcuate sheet structure may be any, for example symmetrical or asymmetrical. As long as the heat generating units are combined with each other, a hollow cylindrical structure is basically formed. Or the heating unit and the heating sheet bracket are combined together to basically form a hollow cylindrical structure.

For example, the shape of the heat generating sheet may be a regular or irregular circular arc sheet. For example, the proximal lip area of the circular arc is smaller and the middle and distal lip areas are larger. This allows the distal lip of the substance to be heated more fully while avoiding the proximal lip of the substance to be heated from being too hot to burn the mouth.

Preferably, the heating sheet material is selected from conductive ceramics, metal sheets, metal meshes, metal alloy printed circuits and the like. Of course, the heat-generating sheet may be selected from any other suitable material that is both electrically conductive and thermally conductive.

Preferably, the heating sheet support is made of high-temperature resistant insulating materials, and ceramics, glass, high-temperature resistant polymers or metal sheets provided with insulating materials can be selected.

A second aspect of the utility model provides the use of a heat-generating body assembly as described in any of the first aspects for adapting a short, coarse aerosol-generating article for circumferential heating.

A third aspect of the present utility model provides the method for manufacturing a heat generating body assembly according to the first aspect, when the heat generating unit is a heat generating sheet of an arc-shaped sheet structure and the heat generating sheet is a ceramic sheet printed with a metal heat generating wire, the method comprising the steps of:

preparing two or more heating sheet wet molds by using an injection molding process;

printing a metal heating wire on each heating sheet wet mold, and then sintering to obtain two or more heating sheets;

and then combining the heating sheets or combining the heating sheets and the heating unit fixing piece to form the heating body component.

When the whole heating sheet is a conductive ceramic sheet, the heating sheet is prepared by adding metal powder and glass phase substance powder into matrix powder, and the specific preparation method is as follows:

and (3) batching: weighing matrix powder, metal powder and high-temperature binding phase substance powder, and uniformly mixing;

and (3) grinding materials: grinding the mixed raw material powder in an abrasive machine;

drying to obtain a blank: drying the ground raw materials, adding a forming agent, uniformly mixing, and preparing a blank body by a dry pressing, tape casting or extrusion mode through a die;

sintering and forming: and (3) transferring the blank to a sintering furnace for normal pressure or hot-pressing sintering, and cooling along with the furnace to obtain the heating sheet.

When the whole heating sheet is a stainless steel sheet, the preparation method is as follows:

stainless steel sheet, degreasing, washing, etching, washing, drying, screen printing, drying, soaking, etching to form a required shape, washing, removing ink, washing, pickling, washing, electropolishing, washing with hot water, and drying; the heating sheet is obtained.

A fourth aspect of the present utility model provides a circumferentially segmented heated aerosol-generating device comprising a heat-generating body assembly as defined in any one of the first aspects, the heat-generating body assembly being connected to a control system which controls the heat-generating body assembly to operate in accordance with one of the following:

(1) Sequentially starting adjacent heating units according to a set time interval;

(2) Starting all heating units at the same time;

(3) At least one heating unit is started, and the rest heating units are started at the same time after a set time interval.

Of course, the starting and closing time of each heating sheet can be arbitrarily controlled according to the requirement.

The technical proposal can be freely combined on the premise of no contradiction.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model provides a circumferential heating element assembly composed of 2 or more heating units. By controlling the start-up and shut-down time of each heating unit, the effect of heating the aerosol-generating article in a transverse and sectional manner can be achieved, so that the aerosol can be released more uniformly in the whole suction period of the aerosol-generating article. This can solve the problem of insufficient smoke levels in conventional aerosol-generating articles during the later stages of extraction.

2. Particularly, the circumferential heating element assembly formed by adopting more than 2 heating sheets is simpler in preparation method, and the preparation method is specifically characterized in that:

each heating sheet is basically arc-shaped, and can be directly printed with a heating circuit on a heating sheet wet die and then sintered and molded.

The conventional hollow cylindrical heating element is required to be sintered by wet molding to obtain a heating element primary mold, a heating circuit is printed on a flexible ceramic blank, the flexible ceramic blank is then coiled on the cylindrical heating element primary mold, and the hollow cylindrical heating element is finally formed by secondary sintering.

3. The cylindrical heating element conventionally used for circumferential heating is elongated and is suitable for heating an elongated aerosol-generating article. The slender cylindrical heating body is easy to perform upper and lower sectional heating design, and is not easy to perform circumferential sectional design.

Compared with the original single cylindrical heating body, the heating body component is designed in a circumferential segmentation way, and the whole shape can be designed to be short and thick. The whole length of the heating body is shortened, the production and the processing are convenient, the structure of a short and thick aerosol generating product can be adapted, the structure of the aerosol generating product and the aerosol generating device is simultaneously reduced, and the carrying is convenient for customers.

4. The heating unit fixing piece can support and fix a plurality of heating units, can reduce heat transfer between adjacent heating units, and avoid temperature rise of the heating units which are not started. In this way, the portion of the aerosol-generating article that is adjacent to the non-activated heat generating element does not reach the temperature at which aerosol is generated and therefore does not generate aerosol. Therefore, the circumferential heating element assembly has more obvious effect of circumferential segmented heating on the aerosol-generating article.

Drawings

FIG. 1 is a schematic perspective view of a heat-generating body assembly according to example 1.

FIG. 2 is a three-view of a heat-generating body assembly of example 1. Fig. 2a is a top view, 2b is a front view, and 2c is a bottom view.

FIG. 3 is a schematic perspective view of a heat-generating body assembly of example 3.

FIG. 4 is a three-view of a heat-generating body assembly of example 3. Fig. 4a is a top view, 4b is a front view, and 4c is a bottom view.

FIG. 5 is a side view of a heat-generating body assembly of example 3.

Fig. 6 is a schematic view of an aerosol-generating device comprising the heat-generating body assembly of this example 3.

List of reference numerals:

1. a heating unit 2, a heating unit fixing piece 3, a wire 4 and an aerosol generating product, and 5, a heating element assembly, 6, a key, 7, a circuit board, 8 and a battery cell.

Detailed Description

The present utility model will be described in further detail with reference to examples.

It will be appreciated by those skilled in the art that the following examples are illustrative of the present utility model and should not be construed as limiting the scope of the utility model. The specific techniques or conditions are not identified in the examples and are performed according to techniques or conditions described in the literature in this field or according to the product specifications. The materials or equipment used are conventional products available from commercial sources, not identified to the manufacturer.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" as used herein may include wireless connections.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. The orientation or state relationship indicated by the terms "inner", "upper", "lower", etc. are orientation or state relationship based on the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "provided" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model is understood by those of ordinary skill in the art according to the specific circumstances.

It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Example 1

As shown in fig. 1 to 2, a multi-sheet heating element assembly 5, the heating element assembly 5 includes: two identical arc-shaped sheet heating units 1 and heating unit fixing pieces 2 which are arranged side by side.

Wherein, two heating units 1 and the heating unit fixing parts 2 are combined together to form a hollow cylindrical structure with a bottom.

In this embodiment, the heat generating unit 1 is a regular arc-shaped heat generating sheet with a symmetrical structure. The heating unit fixing member 2 is a heating sheet bracket having two heating unit mounting positions for supporting and fixing the heating sheet.

The heating sheet support is basically of a cup-shaped structure, the cup bottom is provided with a plurality of airflow through holes, and the cup wall is provided with two grooves which are spaced apart and matched with the heating sheet in shape. The groove is used as a mounting position of the heating unit. The height of the heating piece is smaller than the whole height of the cup wall, and the purpose is that: the periphery of the heating sheet is clamped and fixed by the heating sheet bracket. At the same time, the heating plates are completely separated from each other by the heating plate bracket, so that heat transferred between the heating plates can be reduced.

The ratio of the circumferential edge length of the spacer of the heat generating fin support to the circumferential edge length of the heat generating unit is 0.2. In alternative embodiments, this numerical ratio may vary depending on the circumstances.

The heating element assembly 5 further includes: two pairs of wires 3. The wire 3 serves as a conductive pin. Each heat generating plate is individually connected to an external circuit through a pair of wires 3. The external circuit is used for being connected to the control system to independently start each heating piece to heat, realize the independent control to each heating piece.

In this embodiment, the heating sheet is made of ceramic material with a metal heating wire printed on the inner surface. Insulation is realized between adjacent heating plates through the heating plate support. In alternative embodiments, the heat generating sheet material may be selected from conductive ceramics, metal sheets, metal meshes, metal alloy printed circuits, and the like.

In this embodiment, the heat-generating sheet support is a high-temperature-resistant polymer material peek (polyether-ether-ketone). In alternative embodiments, the heat patch brackets may also be selected from ceramics, glass, high temperature resistant polymers, or metal sheets provided with insulating materials, etc.

In alternative embodiments, the heat-generating sheet may be irregularly shaped as a circular arc sheet. For example, the proximal lip area of the circular arc is smaller and the middle and distal lip areas are larger. This allows the distal lip of the substance to be heated more fully while avoiding the proximal lip of the substance to be heated from being too hot to burn the mouth.

In alternative embodiments, the two heat-generating fins may also be shaped differently, by simply designing a heat-generating fin holder adapted thereto.

Fig. 1 is a schematic perspective view of the multi-sheet heating element assembly 5.

Fig. 2 is a three-view of the above-described multi-sheet heating element assembly 5. Fig. 2a is a top view, 2b is a front view, and 2c is a bottom view.

Example 2

This example provides a method for manufacturing the multi-sheet heating element assembly 5 of example 1, comprising the steps of:

preparing the heating sheet bracket through an injection molding process;

preparing two arc heating sheet wet molds by using an injection molding process;

printing metal heating wires on the inner surface of each heating sheet wet die, and then sintering to obtain two formed heating sheets;

and then fixing the two heating sheets in the two grooves of the heating sheet bracket, and connecting the two grooves with the lead wires 3 to form the multi-sheet type heating body assembly 5. The fixing mode can be interference fit, clamping connection or adhesion by means of high-temperature resistant adhesive.

The specific operating conditions of the injection molding process, sintering, printing and other processes in the utility model are conventional designs in the art, and can be implemented by those skilled in the art with reference to the prior art.

Example 3

As shown in fig. 3 to 5, a multi-sheet type heating element assembly 5 is different from embodiment 1 in that: the heating element assembly 5 includes: three identical arc heating plates are arranged side by side, and three grooves which are spaced apart and matched with the heating plates in shape are arranged on the cup wall of the heating plate bracket. The heating element assembly 5 comprises three pairs of wires 3.

Fig. 3 is a schematic perspective view of the multi-sheet heating element assembly 5.

Fig. 4 is a three-view of the above-described multi-sheet heating element assembly 5. Fig. 4a is a top view, 4b is a front view, and 4c is a bottom view.

Fig. 5 is a side view of the multi-sheet heating element assembly 5.

Fig. 6 is a schematic diagram of an aerosol-generating device including the multi-sheet heating element assembly 5 of the present embodiment. The aerosol-generating device comprises: aerosol-generating article 4, heater assembly 55, key 6, circuit board 7, cell 8. The multi-sheet heat generating body assembly 5 performs circumferential, transverse, segmented heating of the aerosol-generating article 4.

The working modes of the multi-sheet heating element assembly 5 include the following three modes:

the working mode is as follows: adjacent heating sheets are separated by a certain time, heating is started in sequence according to the clockwise direction, and only one heating sheet is started at a time;

the working mode II is as follows: firstly, controlling two adjacent heating plates to start heating, and after a certain time, starting a third heating plate to heat;

and the working mode is as follows: and controlling the three heating sheets to start heating simultaneously.

Example 4

A heat-generating body assembly differing from embodiment 1 in that: the heating element assembly 5 includes: three identical arc heating plates are arranged side by side. The three arc heating sheets are combined to form a hollow columnar structure. Within the hollow columnar structure is an aerosol-generating article-receiving cavity. The heating element assembly of this embodiment is not provided with a heating element fixing member. The heating sheet of the embodiment is a conductive ceramic sheet. An insulating layer is arranged on the surface of the conductive ceramic plates so as to realize insulation between adjacent conductive ceramic plates.

In an alternative embodiment, the insulating layer may be provided only at the interface where two adjacent conductive ceramic sheets are in contact.

In an alternative embodiment, the three arc-shaped heat generating fins may also have different shapes, as long as the three arc-shaped heat generating fins are combined to form a hollow columnar structure.

The heating element assembly in this example was prepared by the following method:

step 1, batching: weighing matrix powder, metal powder and high-temperature binding phase substance powder, and uniformly mixing;

step 2, grinding material: grinding the mixed raw material powder in an abrasive machine;

step 3, drying to form a blank: drying the ground raw materials, adding a forming agent, uniformly mixing, and preparing a blank body by a dry pressing, tape casting or extrusion mode through a die;

step 4, sintering and forming: and (3) transferring the green body into a sintering furnace for normal pressure or hot-pressing sintering, and cooling along with the furnace to obtain the three arc-shaped heating sheets.

And 5, coating insulating layers on the three arc-shaped heating sheets, bonding and combining to form a hollow columnar structure, and welding wires to obtain the heating body component.

The specific operating conditions of the steps of batching, grinding, drying to form a blank, sintering to form and the like are conventional designs in the field, and can be implemented by a person skilled in the art with reference to the prior art.

Example 5

A heat-generating body assembly differing from embodiment 1 in that: the heating element assembly 5 includes: three arc heating pieces and hollow cylindrical heating unit fixing pieces which are arranged side by side and have different shapes.

The arc heating piece is adhered or clamped in a groove on the inner wall of the heating unit fixing piece. The heating unit fixing piece is obtained through injection molding. The heat generating sheet of this embodiment is a stainless steel sheet. The arc heating sheets are insulated by the heating unit fixing piece.

step 1, corroding stainless steel to obtain three arc-shaped heating sheets with different shapes, wherein the process route is as follows:

stainless steel sheet, degreasing, washing, etching, washing, drying, screen printing, drying, soaking, etching to form a required shape, washing, removing ink, washing, pickling, washing, electropolishing, washing with hot water, and drying.

And 2, bonding three arc-shaped heating sheets with different shapes in grooves with corresponding shapes on the inner wall of the heating unit fixing piece, and welding wires to obtain the heating body component.

The specific operating conditions in the above step 1 process route are conventional in the art and can be implemented by those skilled in the art with reference to the prior art.

Example 6

The arc heating piece is adhered to the inner wall surface of the hollow cylindrical heating unit fixing piece. The arc heating sheets are insulated by the hollow cylindrical heating unit fixing piece.

In alternative embodiments, the arcuate heat generating fins may be replaced with a heat generating mesh or heat generating filaments. The heating net or the heating wire is coated with a smooth protective layer to prevent tar residue from being corroded.

Claims

1. A heat-generating body assembly, characterized in that the heat-generating body assembly comprises: two or more heating units arranged side by side;

2. A heat-generating body assembly as recited in claim 1, wherein said two or more heat-generating units are combined to form a hollow columnar structure;

3. A heat generating body assembly as recited in claim 1, wherein said heat generating unit is selected from the group consisting of: one or more of heating sheet, heating net or heating wire.

4. The heat-generating body assembly of claim 1, further comprising: a plurality of pairs of wires; which is used to connect each heating unit with an external circuit.

5. A heat-generating body assembly as recited in claim 1, wherein said heat-generating unit fixing member is a bracket, and said heat-generating units are spaced apart from each other by a spacing section of said bracket.

6. A heat-generating body assembly as recited in claim 1, wherein the heat-generating units are identical or different in shape from each other.

7. A heat-generating body assembly as recited in claim 2, wherein the heat-generating units are arc-shaped sheet-like structures identical to or different from each other, and the columnar structure is a cylindrical structure.