CN113995175A - Electromagnetic heating type aerosol delivery device and magnetic particle soaking type aerosol delivery system - Google Patents
Electromagnetic heating type aerosol delivery device and magnetic particle soaking type aerosol delivery system Download PDFInfo
- Publication number
- CN113995175A CN113995175A CN202111484441.XA CN202111484441A CN113995175A CN 113995175 A CN113995175 A CN 113995175A CN 202111484441 A CN202111484441 A CN 202111484441A CN 113995175 A CN113995175 A CN 113995175A
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- aerosol
- aerosol delivery
- receiving chamber
- generating article
- coil
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 44
- 239000000443 aerosol Substances 0.000 title claims abstract description 30
- 238000002791 soaking Methods 0.000 title claims abstract description 22
- 239000006249 magnetic particle Substances 0.000 title description 17
- 238000004804 winding Methods 0.000 claims abstract description 33
- 230000005284 excitation Effects 0.000 claims abstract description 15
- 235000019504 cigarettes Nutrition 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000000391 smoking effect Effects 0.000 description 16
- 238000001816 cooling Methods 0.000 description 5
- 241000208125 Nicotiana Species 0.000 description 3
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 3
- 230000004323 axial length Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000008216 herbs Nutrition 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
- A24F40/465—Shape or structure of electric heating means specially adapted for induction heating
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/04—Cigars; Cigarettes with mouthpieces or filter-tips
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/20—Cigarettes specially adapted for simulated smoking devices
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- General Induction Heating (AREA)
Abstract
The invention discloses an electromagnetically heated aerosol delivery device comprising a cylindrical aerosol-generating article receiving chamber (1) and an excitation coil (2) surrounding the outer wall of the receiving chamber, the windings of the excitation coil (2) being at an angle of 20 ° to 70 ° to the central axis of the aerosol-generating article receiving chamber (1). The invention adopts the coil inclined winding mode, and compared with the coil vertical winding mode, the invention can ensure that the magnetic field intensity in the accommodating cavity of the aerosol generating product is more uniform, is particularly favorable for being matched with the magnetic grain soaking type aerosol generating product for use, and realizes more uniform electromagnetic heating.
Description
Technical Field
The invention belongs to the field of aerosol delivery, and particularly belongs to the field of electromagnetic heating type aerosol delivery.
Background
Heated non-combustible aerosol delivery refers to the process of heating an aerosol-generating article below the ignition temperature to volatilize aerosol for inhalation by a user. The most typical aerosol generating article is tobacco, which can be heated to a temperature below its ignition point to smoke it, greatly reducing the variety of harmful substances in conventional cigarette smoking, and has become an overwhelming technical trend to replace conventional cigarette smoking type cigarettes. Of course, aerosol-generating articles are not limited to tobacco, and many other herbs can be heated to produce an aerosol of a particular flavour. The heating methods include fuel heating, resistance heating, electromagnetic heating and the like, and the electromagnetic heating is the mainstream heating method in this year.
Electromagnetic heating typically uses an electromagnetic heating type aerosol-generating device (often referred to simply as a "smoking article", which necessarily includes an excitation coil) to add a hot aerosol-generating article (often referred to simply as a "tobacco rod") contained in an aerosol-generating article-containing cavity (often referred to simply as a "cup", hereinafter the terms "cup" and "aerosol-generating article-containing cavity" will be used interchangeably with the same meaning as each other, as will the remaining equivalent terms) to produce an aerosol for smoking by a user. The smoking set may have an elongate sheet susceptor (commonly referred to as an "electromagnetic heating pad") fixed at one end and extending into the cup at the other end, the electromagnetic heating pad being inserted into the cigarette when the cigarette is inserted into the cup, the peripheral excitation coil being activated to generate an alternating magnetic field, and the sheet susceptor being responsive to changes in the magnetic field to generate eddy currents to effect electromagnetic heating. Or the cigarette can be provided with an electromagnetic heating sheet, and the cigarette can be heated typically under the action of the exciting coil of the smoking set. The elongate sheet susceptor provides a central heating mode in which the temperature is highest at the central axis of the aerosol-generating article and also tends to decrease as heat spreads radially. Uniform heating in the radial direction is not achieved with elongated sheet susceptors.
An improved way is to use a magnetic-particle soaking type aerosol-generating article, i.e. susceptor particles (also called "magnetic particles") are uniformly distributed in a segment of aerosol-generating material, each magnetic particle generating heat in response to a change in the magnetic field, thereby achieving uniform electromagnetic heating of the aerosol-generating material.
In practice the inventors of the present invention have found that even if the magnetic particles are uniformly distributed, uniform heating of the aerosol-generating material cannot be achieved. The inventors dissected the heated aerosol-generating article and found that the aerosol-generating material at the periphery was darker than the aerosol-generating material near the central axis, indicating that the aerosol-generating material was heated more heavily towards the periphery.
The invention aims to solve the problem of radial uniformity of electromagnetic heating.
Disclosure of Invention
In a first aspect the invention discloses an electromagnetically heated aerosol-delivery device comprising a cylindrical aerosol-generating article-receiving chamber 1 and an excitation coil 2 surrounding the outer wall of the chamber, the essential point being that the winding of the excitation coil 2 forms an angle of 20 ° to 70 °, preferably 30 ° to 60 °, more preferably 40 ° to 50 ° (degrees) with the central axis of the aerosol-generating article-receiving chamber 1
Wherein, the containing cavity 1 is made of non-magnetic conductive material, so that the containing cavity can not generate heat by electromagnetic induction. The receiving chamber 1 is generally cup-shaped and may or may not have a bottom wall.
The angle between the winding of the excitation coil 2 and the central axis of the aerosol-generating article receiving chamber 1 is the angle between the projection line of the winding and the central axis of the receiving chamber in the front view of the receiving chamber. Usually, for conventional field coils, the angle is very close to 90 °, which is the most common winding method for field coils, and is generally referred to as a vertical winding method by technicians. The greatest difference between the present invention and conventional field coils is that the angle is no longer very close to 90 °, but is 20 ° to 70 °, preferably 30 ° to 60 °, more preferably 40 ° to 50 °, and is not simply referred to as the oblique winding.
Preferably, the winding is flat, that is, the thickness of the winding is smaller than the width thereof, wherein the width refers to the dimension of the winding in the direction of the central axis of the accommodating cavity 1, and the thickness refers to the dimension of the winding in the radial direction of the accommodating cavity 1.
Preferably, the aerosol-generating article-receiving cavity 11 is provided at its base with a stop 13 for abutment of the distal lip end of an aerosol-generating article 2, described below, thereon for stopping and locating, the stop 13 being positioned so as to place the entire length 24 of aerosol-generating material within a substantially uniform magnetic field. The form of the activator is not limited as long as it acts as a stop location for the aerosol-generating article 2 when it is inserted into the aerosol-generating article-receiving cavity 1.
A second aspect of the invention relates to a magnetic-particle-soaking aerosol-delivery system comprising an electromagnetically-heated aerosol-delivery appliance according to the first aspect of the invention and a magnetic-particle-soaking aerosol-generating article, wherein susceptor particles (i.e. magnetic particles) are uniformly distributed in a segment of aerosol-generating material of the magnetic-particle-soaking aerosol-generating article. A typical magnetic particle soaking aerosol-generating article is constructed as shown in figure 3 and comprises, in order from the distal lip to the proximal lip, a segment 24 of aerosol-generating material filled with susceptor particles, a supporting and restraining segment 23, a cooling segment 22 and a filter 21, wherein the segment 24 of aerosol-generating material is filled with susceptor particles, not shown in figure 2, the supporting and restraining segment 23 has an intermediate airflow channel, the cooling segment 22 is filled with cooling material or the cooling segment 22 is an empty tube with through ventilation holes in the side wall, and the filter 21 is a conventional porous filter material rod, such as a cellulose acetate rod.
A third aspect of the invention relates to a method of improving the uniformity of heating of a magnetic grain soaking aerosol-generating article, the key point being the use of a magnetic grain soaking aerosol delivery system as shown in the second aspect of the invention.
The technical scheme can be freely combined on the premise of no contradiction.
The invention has the following beneficial effects:
the present invention appears to be simple but is in fact based on the inventors' profound understanding of why magnetic grain soaking aerosol-generating articles do not achieve radial soaking in practice. Generally, the skilled person considers that uniform distribution of magnetic particles can achieve uniform electromagnetic heating, which is a default premise that the magnetic field of the excitation coil where the magnetic particles are located is also uniformly distributed, and the skilled person considers that the default premise is true because high physical knowledge tells them that the magnetic field in the solenoid (i.e. the excitation coil) is a typical uniform magnetic field, i.e. the magnetic lines of force in the coil are parallel to each other and equal in intensity everywhere, so the skilled person considers that uniform electromagnetic heating can be achieved as long as the magnetic particles are uniformly distributed. However, the skilled person neglects an important prerequisite that the so-called magnetic field inside the solenoid is homogeneous everywhere, based on the assumption that the solenoid is a "long direct wound" solenoid, i.e. a solenoid with a length much greater than its diameter (typically greater than 30:1) and with a wire (typically a lacquered wire, with an insulating outer coating) very thin (negligible with respect to the solenoid diameter) and tightly wound next to each other, with a number of turns close to infinity. The solenoid commonly used in the electromagnetic heating smoking set does not completely meet the condition of long, direct and close winding, particularly, under the condition that the axial length of a smoking section of a cigarette is short, the axial length of a magnet exciting coil on the smoking set is also short, and in addition, because the electromagnetic induction heating power is high, the current intensity in a required winding is also high, so that the winding cannot be too thin (the too thin winding is easily burnt off), but has certain practical thickness, a thick wire is wound on the short axial length, and the number of turns is necessarily limited to several turns, but not infinite. It can be seen that in the specific application scenario of the electromagnetic heating smoking set, the excitation coil has deviated from the basic precondition of "long, direct and close winding", so that the magnetic field inside the coil is no longer uniform.
The inventors have found that the magnetic field intensity distribution in a coil having a single turn or a limited number of turns (e.g., less than ten turns) is generally U-shaped as shown in fig. 1, and the magnetic field intensity is approximately uniform only within a distance from the central axis (a part of this region is referred to as "approximately uniform region"), whereas the magnetic field intensity increases at a distance from the central axis and the magnetic field intensity increases at a distance from the coil (a region outside the approximately uniform region and inside the coil is not referred to as "increased region"). Just so, the magnetic particle soaking type cigarette is close to the magnetic field intensity that its periphery was experienced and is higher than axis department, and induction heating intensity is also higher, so can not really realize radial even heating.
The invention changes the winding mode from vertical winding to inclined winding, thus solving the problem.
As shown in fig. 2, after the inclined area is changed, the approximate uniform intensity area and the elevated area of each coil are staggered with each other, instead of the simple overlap mode in which the approximate uniform intensity area and the approximate uniform intensity area overlap and the elevated area overlap in the vertical winding mode. For example, the elevated region of a single turn coil overlaps the approximately uniform region of an adjacent coil, which in turn overlaps the elevated region of its adjacent coil, so that the magnetic field strength throughout the cup becomes more uniform. Of course, the overall direction of the magnetic force lines in the coil will form a certain angle with the central axis of the cigarette cup. However, this does not affect the electromagnetic heating.
Therefore, the electromagnetic heating smoking set is particularly suitable for electromagnetically heating the magnetic particle soaking type cigarettes. Of course, the electromagnetic heating smoking set of the invention can also be used for electromagnetically heating other types of cigarettes, because even if the magnetic lines of force are inclined, the electromagnetic heating can also be carried out, and only for other types of cigarettes, the heating can be realized by using a conventional vertical winding type coil and placing an electromagnetic heating sheet in an approximately even intensity area of the coil, and the coil of the invention is not necessarily used as the inclined winding type electromagnetic heating smoking set.
The invention also facilitates the miniaturization of the smoking set structure. Referring to fig. 1, by using the conventional coil vertical winding method, if the coil diameter is enlarged to make the whole cigarette with uniform heating of magnetic particles be located in the approximate uniform-strength region, the magnetic particles in the cigarette can be uniformly heated. However, the diameter of the coil is enlarged, which means that a bracket is additionally arranged outside the cigarette cup to wind the coil, so that the smoking set cannot be small enough. The coil should be wound on the outer wall of the cigarette cup as much as possible if the cigarette is small, and the outer wall of the cigarette cup is very thin for the purpose of magnetic permeability in the cigarette cup, so that the whole cigarette cannot be positioned in an approximately even-strength area of the coil, and uneven heating is caused. Therefore, the traditional coil vertical winding method cannot be considered between uniform heating and small smoking set. The invention adopts the coil inclined winding method, so that the coil can be directly wound on the outer wall of the cigarette cup to realize uniform heating, and the two difficulties are solved.
Drawings
Fig. 1 is a diagram of the magnetic field strength profile of a single turn or a limited number of turns coil.
Figure 2 is a schematic diagram of a front view of an electromagnetically heated aerosol delivery device of the present invention (only the aerosol-generating article receiving chamber and the excitation coil are shown, with remaining components omitted).
Figure 3 is a schematic diagram of an exemplary magnetic grain soaking aerosol-generating article structure in which the magnetic grains are uniformly distributed within a segment of aerosol-generating material, not shown.
Figure 4 is a schematic view of a magnetic particle-averaging aerosol-generating article when inserted into an electromagnetically heated aerosol delivery device of the present invention.
The above figures are only schematic and not drawn to scale, the number of coil turns and the pitch are also only schematic and conventional parts not relevant to the core idea of the invention are omitted and not shown in the figures.
List of reference numerals:
1. an electromagnetically heated aerosol delivery device; 11. an aerosol-generating article-receiving cavity; 12. a field coil; 13. a stopper; 14. an aerosol-generating article-receiving cavity central axis; 2. an aerosol-generating article; 21. a filtration section; 22. a cooling section; 23. supporting the limiting section; 24. a segment of aerosol generating material.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1
As shown in fig. 2, the electromagnetically heated aerosol delivery device 1 of the present invention comprises a cylindrical aerosol-generating article-receiving chamber 11 surrounded on its outer wall by an excitation coil 12, which is wound as a standard circular cross-section of enamelled wire, at an angle θ of 60 ° to the central axis of the cup, and 20 turns of the coil.
Example 2
As also shown in fig. 2, the electromagnetically heated aerosol delivery device 1 of the present invention comprises a cylindrical aerosol-generating article-receiving chamber 11 surrounded on its outer wall by an excitation coil 12, the winding of which is a flat printed coil (5 mm wide and 0.2mm thick) having an angle θ of 70 ° with respect to the central axis of the cup and 8 turns.
Example 3
As shown in fig. 3 and 4, inserting a magnetic particle soaking aerosol-generating article 2 into the aerosol-generating article-receiving cavity 11 of the electromagnetically-heated aerosol delivery device 1 shown in fig. 2 and abutting its distal lip end against the stop 13 with the entire length 24 of aerosol-generating material within a substantially uniform magnetic field achieves a more uniform magnetic particle soaking effect than within a vertically-wound coil.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. An electromagnetically heated aerosol delivery device comprising a cylindrical aerosol-generating article receiving chamber (1) and an excitation coil (2) surrounding an outer wall of the chamber, characterised in that the winding of the excitation coil (2) makes an angle of between 20 ° and 70 ° with the central axis of the aerosol-generating article receiving chamber (1).
2. An electromagnetically heated aerosol delivery device according to claim 1, wherein the included angle is 30 ° -60 °.
3. An electromagnetically heated aerosol delivery device according to claim 1, characterized in that the receiving chamber (1) is a receiving chamber made of a non-magnetically conductive material.
4. An electromagnetically heated aerosol delivery device according to claim 1, characterized in that the winding is flat, i.e. the thickness of the winding is smaller than its width, wherein width refers to the dimension of the winding in the direction of the central axis of the receiving chamber (1) and thickness refers to the dimension of the winding in the radial direction of the receiving chamber (1).
5. An electromagnetically heated aerosol delivery device according to claim 1, characterized in that the aerosol-generating article receiving chamber (11) is provided with a stop (13) at the bottom.
6. A magnetic grain soaking aerosol delivery system comprising an electromagnetically heated aerosol delivery apparatus according to any one of claims 1 to 5 and a magnetic grain soaking aerosol-generating article, wherein susceptor particles are uniformly distributed in a segment of aerosol-generating material of the magnetic grain soaking cigarette.
7. A method of improving the uniformity of heating of a magnetic grain soaking aerosol-generating article, characterized in that a magnetic grain soaking aerosol delivery system according to claim 6 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111484441.XA CN113995175A (en) | 2021-12-07 | 2021-12-07 | Electromagnetic heating type aerosol delivery device and magnetic particle soaking type aerosol delivery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111484441.XA CN113995175A (en) | 2021-12-07 | 2021-12-07 | Electromagnetic heating type aerosol delivery device and magnetic particle soaking type aerosol delivery system |
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| Publication Number | Publication Date |
|---|---|
| CN113995175A true CN113995175A (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111484441.XA Pending CN113995175A (en) | 2021-12-07 | 2021-12-07 | Electromagnetic heating type aerosol delivery device and magnetic particle soaking type aerosol delivery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023243879A1 (en) * | 2022-06-16 | 2023-12-21 | Kt&G Corporation | Aerosol generating device and system including the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101120617A (en) * | 2005-02-18 | 2008-02-06 | 新日本制铁株式会社 | Induction heating device and method for metal plate |
| CN110267378A (en) * | 2019-04-30 | 2019-09-20 | 安徽中烟工业有限责任公司 | A kind of magnetic grain soaking heating coil |
| CN113662240A (en) * | 2021-09-23 | 2021-11-19 | 云南中烟工业有限责任公司 | Puncture type cigarette core section perfuming aerosol generating product |
| CN216393072U (en) * | 2021-12-07 | 2022-04-29 | 云南中烟工业有限责任公司 | Electromagnetic heating type aerosol delivery device and magnetic particle soaking type aerosol delivery system |
-
2021
- 2021-12-07 CN CN202111484441.XA patent/CN113995175A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101120617A (en) * | 2005-02-18 | 2008-02-06 | 新日本制铁株式会社 | Induction heating device and method for metal plate |
| CN110267378A (en) * | 2019-04-30 | 2019-09-20 | 安徽中烟工业有限责任公司 | A kind of magnetic grain soaking heating coil |
| CN113662240A (en) * | 2021-09-23 | 2021-11-19 | 云南中烟工业有限责任公司 | Puncture type cigarette core section perfuming aerosol generating product |
| CN216393072U (en) * | 2021-12-07 | 2022-04-29 | 云南中烟工业有限责任公司 | Electromagnetic heating type aerosol delivery device and magnetic particle soaking type aerosol delivery system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023243879A1 (en) * | 2022-06-16 | 2023-12-21 | Kt&G Corporation | Aerosol generating device and system including the same |
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