WO2023138527A1

WO2023138527A1 - Electromagnetic heating type aerosol generating appliance having discrete cambered susceptors and use method therefor

Info

Publication number: WO2023138527A1
Application number: PCT/CN2023/072322
Authority: WO
Inventors: 陈莹
Original assignee: 深圳市博迪科技开发有限公司
Priority date: 2022-01-23
Filing date: 2023-01-16
Publication date: 2023-07-27
Also published as: CN116509075A

Abstract

An electromagnetic heating type aerosol generating appliance having discrete cambered susceptors. The aerosol generating appliance is a heat-not-burn aerosol generating appliance. The aerosol generating appliance comprises a coil (11) and an accommodating cavity (12) disposed inside the coil (11); the accommodating cavity (12) is configured to accommodate an aerosol generating article (2) containing an axially disposed sheet-shaped susceptor (21) therein; and a plurality of circumferentially discrete cambered susceptors (13) are provided on an inner wall of the accommodating cavity (12). An aerosol generating material in an area of the sheet-shaped susceptor (21) having a reduced heating effect is subjected to additional heating using the cambered susceptors (13), thereby increasing the utilization rate of the aerosol generating material and the amount of aerosol generated.

Description

An electromagnetically heated aerosol generating appliance with discrete arcuate receptors and method of use thereof

technical field

The invention belongs to the field of heat-not-burn (Heat-Not-Burn, commonly known as HNB) aerosol generators.

Background technique

Heat-not-burn aerosol generating devices (commonly known as HNB smoking devices or HNB smoking devices) release aerosols for users to smoke and enjoy by heating aerosol generating materials (also known as smoking materials) without burning them. The aerosol generating materials include but are not limited to tobacco, tea, mugwort, vanilla and many other herbs that can release specific aromas, the most typical one is tobacco. In addition to its own natural fragrance components, the aerosol generating materials may also contain additional fragrances (such as menthol, rose essential oil, etc.), smokers (such as glycerin, propylene glycol, etc. Polyols) and the like. Currently, the most popular heat-not-burn aerosol-generating products are various cigarettes with tobacco as the smoking material and various herbal heating-type smoking products with non-tobacco herbal plants as the aerosol-generating material.

The aerosol-generating article is typically heated by means of a heating appliance. The heating methods include resistance heating and electromagnetic heating. Resistance heating is to insert a resistance heating sheet into the inside of the aerosol generating product for heating, but the resistance heating sheet is easy to bend or even break, and when the aerosol generating product is pulled out after heating, it is easy to drop residue or leave residue on the resistance heating sheet, and the residue will be burnt and cause bad smell when heating next time.

Electromagnetic heating solves the above problems. Electromagnetic heating does not permanently install a sheet-like susceptor in the heating appliance, but presets the sheet-like susceptor as a disposable consumable inside the aerosol-generating material section of the aerosol-generating product, so that the aerosol-generating product can be inserted into/pulled out of the accommodating chamber of the heating appliance as a whole. In this way, the risk of bending or breaking the heating plate is completely eliminated, and there is no process of inserting and pulling out the heating plate, and there will be no slag, so it has become a mainstream heating method. The TEREA cigarettes used in the latest HNB product IQOS iluma electromagnetic heating smoking set of the international tobacco giant PMI, which will be released in the second half of 2021, adopt the above-mentioned structure. In addition, many other HNB smoking sets and cigarette manufacturers at home and abroad have followed up and adopted this structure.

However, it has been found in practice that when the sheet-like susceptor is used to heat the smoke-generating material section internally by electromagnetic induction, the amount of smoke generated is relatively small, which is manifested in the thinness of the smoke and the low number of continuous puffs, which cannot meet certain requirements for a large amount of smoke. The needs of the requested users.

The present invention aims to solve the above-mentioned problems.

Contents of the invention

One aspect of the present invention discloses an electromagnetically heated aerosol generator with discrete arcuate susceptors, which includes a coil 11 and a housing chamber 12 placed inside the coil 11, the housing chamber 12 is used to accommodate an aerosol generating product 2 containing axially arranged sheet-like susceptors 21, the key point of which is that the inner wall of the housing chamber 12 is provided with a plurality of circumferential discrete arcuate susceptors 13.

Preferably, the curved surface receptor 13 is attached to the inner wall of the accommodation cavity 12 or embedded in the inner wall of the accommodation cavity 12 .

The susceptor refers to any substance capable of electromagnetic induction heating under an alternating magnetic field, usually a ferromagnetic substance, such as magnetic ferrite, iron, steel, ferrous alloy, etc., such as iron-nickel alloy, permalloy, stainless steel, etc.

The arc surface refers to a part of a cylindrical surface, and its cross section is a continuous arc or an interrupted arc, and the arc refers to a part of the circumference. And it is allowed that the circumferential length of a part of the arc surface is different from the axial length of another part of the arc surface.

The central angle of a single arcuate susceptor is not limited, it can be 1°-180°, preferably 10°-150°, more preferably 20°-120°, more preferably 30°-90°, most preferably 45°-60°.

Preferably, there are a plurality of curved surface receptors, such as 2, 4, 6, 8 or even more, and they are arranged on the inner wall of the accommodating chamber 2 in a circumferentially dispersed manner, preferably in a circumferentially evenly dispersed manner.

The form of the curved surface receptor is not limited, and can be in various forms such as continuous layers, parallel grids, nets, scattered points, etc. Therefore, the curved surface can be a continuous curved surface or a discontinuous curved surface composed of many discrete lines or discrete points.

Preferably, the normal of the arc-shaped susceptor 7 is not parallel to the plane where the sheet-like susceptor 21 is located when the aerosol generating product 2 is inserted into the accommodating cavity 12, preferably perpendicular to the plane where the sheet-like susceptor 6 is located, and of course it may not be vertical, as long as it is not parallel.

Preferably, the accommodating cavity 12 is provided with a phase indicator 121, which is used to indicate that the end face of the sheet-like susceptor 21 is located in the diameter direction indicated by the indicator when the aerosol-generating product is inserted into the accommodating cavity 12, and the diameter direction is not parallel to the normal line of the curved surface susceptor 13.

Preferably, the aerosol-generating product includes an aerosol-generating material segment, a supporting segment, a cooling segment and the filter segment in sequence from the far lip end to the proximal lip end, all of which are wrapped by outer wrapping paper, and the sheet-like receptor 21 is placed inside the aerosol-generating material. Preferably, the aerosol-generating material section is filled with aerosol-generating material, and its shape is not limited, but it is preferably in the form of a sheet or parallel strands, wherein the supporting section has an intermediate airflow channel, and the inside of the cooling section is filled with cooling material or the cooling section is an empty tube with through-holes punched on the side wall. The aerosol-generating product in which the aerosol-generating material section, the supporting section, the cooling section and the filtering section are sequentially connected is a known technology in the field of HNB, and will not be repeated here. In the simplest form of the aerosol-generating article, the support section, the cooling section and the filter section can all be omitted, as these functional sections can be incorporated into the aerosol heating appliance as desired. Of course, at least one of the supporting section, the cooling section and the filtering section can also be omitted and the remaining sections can be kept. The outer wrapping paper is at least used to wrap the aerosol generating material section, and if there are other functional sections, it can also wrap other functional sections at the same time. The outer wrapping paper does not necessarily have to be a single layer, but can also be multi-layered. The outer wrapping paper can be formed by rolls of paper webs or prefabricated paper tubes.

Another aspect of the present invention relates to a method of using the aforementioned electromagnetic heating aerosol generating appliance with discrete curved susceptors to heat an aerosol generating product 2 containing axially arranged sheet-like susceptors 21 . In this method, the aerosol generating product 2 is inserted into the accommodating cavity 12 and subjected to electromagnetic induction heating in an alternating magnetic field provided by the coil. The key point is to control the insertion phase of the aerosol generating product 2 so that the normal of the curved susceptor 13 is not parallel to the plane where the sheet-like susceptor 21 is located. Then, the electromagnetic induction heating of the arc-shaped susceptor 13 is used to supplementarily heat the aerosol-generating material in the heating effect weakening area of the sheet-shaped susceptor 21 . The control here can be controlled by the user's naked eyes, but preferably, the receiving cavity 12 is provided with a phase indicator 121, which is used to instruct the user when the aerosol generating product is inserted into the receiving cavity 12 that the exposed end surface of the sheet-like susceptor 21 inside the aerosol generating product is located in the diameter direction indicated by the indicator, and the diameter direction is not parallel to the normal line of the curved surface receptor 13.

In the cross-section of the aerosol-generating section, the sheet-like susceptors are usually located in a certain diameter direction. The effective temperature field refers to such a temperature area: its temperature is not lower than 90% of the predetermined heating temperature of the susceptor body, and is greater than the heated release aerosol temperature of the aerosol generating material. The area outside the effective temperature field is called the heating effect weakening area. For sheet-like susceptors, the edge of the effective temperature field is usually an ellipse whose major axis is the width direction of the sheet-like susceptor. The length of the major axis of the ellipse is usually about 1.1-1.2 times the width of the sheet-like susceptor. The length of the minor axis of the ellipse is usually in the range of 1/5 to 2/3 of the length of the major axis, depending on the thickness of the sheet-like susceptor. Here, the dimension of the sheet-like susceptor along the axial direction of the aerosol-generating product is called the length, and the sheet-like The longer dimensional direction of the susceptor on the cross-section perpendicular to the axial direction is called the width, and the shorter dimensional direction is called the thickness.

The above technical solutions can be freely combined under the premise of no contradiction.

The present invention has the following beneficial effects:

1. In practice, the inventors found that the reason why the amount of smoke generated by the sheet-like susceptor is relatively low when the sheet-like susceptor is heated from the inside of the smoking material is that the heating effect of the sheet-like susceptor gradually weakens from the central axis of the smoking material to the outer periphery. According to actual tests by the inventors of the present invention, on the cross-section of the aerosol-generating material section, the effective temperature field of the sheet-like susceptor is not a perfect circle but an approximate ellipse, as shown in Figure 3, where the dotted ellipse is the boundary of its effective temperature field, and the smoking material within the dotted ellipse can be effectively heated, which is an effective heating area. In the present invention, a plurality of circumferentially discrete arc-surface receptors are added in the accommodation cavity of the aerosol generating appliance, and the heating effect weakening area is supplemented by electromagnetic induction heating, and the aerosol generating materials in the heating effect weakening area are fully utilized, the aerosol generating amount is increased, and the number of suction ports is extended.

2. In the prior art, there used to be a technical solution that combined the overall circumferential heating of the overall circumferential susceptor with the central heating of the sheet-shaped susceptor, but this technical solution did not carry out a specialized design for the temperature field of the sheet-shaped susceptor, but provided circumferential heating "without difference", resulting in easy overheating in the effective temperature field of the sheet-shaped susceptor and wasting electric energy. In the present invention, a curved surface susceptor is arranged on the inner wall of the containing cavity, and only the area where the heating effect of the sheet-shaped susceptor is weakened is accurately supplemented and heated, which will not cause overheating in the effective temperature field and save electric energy.

Description of drawings

Fig. 1 is a schematic cross-sectional view along the axis of an electromagnetically heated aerosol generating device with a curved susceptor according to the present invention, wherein the curved susceptor is omitted due to inconvenient viewing angle, but the inserted aerosol generating product is shown.

Fig. 2 is a schematic cross-sectional view of the accommodating cavity of the electromagnetically heated aerosol generating device with curved susceptors of the present invention, wherein there are two curved susceptors.

Fig. 3 is a schematic cross-sectional view of an aerosol-generating product containing axially arranged sheet-like susceptors inserted into the chamber shown in Fig. 2 .

Fig. 4 is a schematic cross-sectional view of the accommodating cavity of the electromagnetically heated aerosol generating device with curved surface receptors of the present invention, wherein there are four curved surface receptors, and have phase indicators, and inserted into the inner axial device Aerosol-generating articles with placed sheet-like susceptors.

List of reference signs:

11. Coil; 12. Accommodating cavity; 121. Phase indicator; 13. Arc susceptor; 2. Aerosol generating product; 21. Sheet susceptor.

Dotted ellipse: boundary of effective temperature field; dot-dash line: normal of curved surface susceptor.

Detailed ways

The content of the present invention will be further described below through specific embodiments.

Example 1

As shown in Figures 1 to 3, the electromagnetic heating type aerosol generating device with discrete arcuate susceptors of the present invention includes a coil 11 and an accommodation chamber 12 placed inside the coil 11. The accommodation chamber 12 is used to accommodate an aerosol generating product 2 containing an axially arranged sheet-like susceptor 21. Two circumferential discrete arcuate susceptors 13 are arranged on the inner wall of the accommodation chamber 12. The central angle of each arcuate susceptor is 60° and its normal line is perpendicular to the location of the susceptor 21 in the sheet. plane. The curved susceptor is embedded in the inner wall of the accommodation cavity, and its exposed surface is flush with the inner wall of the accommodation cavity

Example 2

It is basically the same as in Example 1, except that there are 4 arcuate susceptors and the central angle is 30°, as shown in Figure 4 , in addition, the arcuate susceptor 4 is attached to the inner wall of the accommodating cavity 12. Since the arcuate susceptor 4 has more or less a certain thickness, after the aerosol generating product 2 is inserted, there will be a gap between the aerosol generating product 2 and the inner wall of the accommodating cavity where the arcuate susceptor 4 is not provided, allowing air to flow through in the axial direction, from the end or waist of the aerosol generating product 2 (If the waist has ventilation holes or the outer wrapping paper 5 of the aerosol generating product is a gas-permeable material), it enters the inside of the aerosol generating product, and plays the role of carrying the aerosol out and/or cooling the aerosol.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

An electromagnetic heating type aerosol generating appliance with discrete arcuate susceptors, comprising a coil (11) and an accommodating cavity (12) placed inside the coil (11), the accommodating cavity (12) being used to accommodate an aerosol generating product (2) containing axially arranged sheet-like susceptors (21), characterized in that a plurality of circumferential discrete arcuate susceptors (13) are arranged on the inner wall of the accommodating cavity (12).
The aerosol generating appliance according to claim 1, characterized in that, the curved surface receptor (13) is attached to the inner wall of the accommodation chamber (12) or embedded in the inner wall of the accommodation chamber (12).
The aerosol generating device according to claim 1, characterized in that there are 2, 4, 6 or 8 arc-shaped receptors (13), which are uniformly dispersed in the circumferential direction.
The aerosol generating appliance according to claim 1, characterized in that, the normal line of the arc-shaped susceptor (13) is not parallel to the plane where the sheet-shaped susceptor (21) is located when the aerosol generating product (2) is inserted into the accommodating cavity (12).
The aerosol generating appliance according to claim 4, characterized in that, the normal line of the curved surface receptor (13) is perpendicular to the plane where the sheet-shaped receptor (21) is located when the aerosol generating product (2) is inserted into the accommodating cavity (12).
The aerosol generating appliance according to claim 1, characterized in that, the receiving chamber (12) is provided with a phase indicator (121), which is used to indicate that the end surface of the sheet-like susceptor (21) is located in the diameter direction indicated by the indicator when the aerosol generating product is inserted into the receiving chamber (12), and the diameter direction is not parallel to the normal line of the arc-shaped susceptor (13).
The aerosol generating appliance according to claim 1, characterized in that, the curved surface receptors (13) are in the form of continuous layers, parallel grids, nets or scattered points.
A method for heating an aerosol-generating product containing an axially arranged sheet-shaped susceptor (21) using the electromagnetic heating aerosol-generating appliance with discrete curved-surface susceptors according to claim 1, the method inserts the aerosol-generating product into the accommodating cavity (12) and performs electromagnetic induction heating in an alternating magnetic field provided by the coil, wherein the insertion phase of the aerosol-generating product is controlled so that the normal of the curved-surface susceptor (13) is not parallel to the sheet-like susceptor (2) 1) the plane where it is located, and then use the electromagnetic induction heating of the arc-shaped susceptor (13) to supplementary heat the aerosol generating material in the heating effect weakening area of the sheet-shaped susceptor (21).
The method according to claim 8, characterized in that, the housing cavity (12) is provided with a phase indicator (121), which is used to indicate that the end surface of the sheet-like susceptor (21) inside the aerosol generating product is located in the diameter direction indicated by the indicator when the aerosol generating product is inserted into the housing chamber (12), and the diameter direction is not parallel to the normal line of the curved surface susceptor (13).