The present application relates to heating cigarette devices, and more specifically, to an aerosol generation device and an electromagnetic heating assembly thereof.
As an emerging technology, an aerosol generation device replaces a conventional burnt cigarette with heated e-liquid or a low-temperature cigarette and has a low working temperature, and harmful components in vapor generated by the aerosol generation device are far less than that of the conventional burnt cigarette, so that negative impact of cigarettes on a human body can be greatly avoided by the aerosol generation device. Therefore, the aerosol generation device becomes a healthier smoking manner.
At present, an aerosol generation device on the mark includes an electromagnetic heating assembly. The electromagnetic heating assembly heats a surrounding tubular heating body through electromagnetic induction, an aerosol-forming substrate is inserted in the tube, and an air layer is provided outside the tube for heat insulation. As a result, after 3 aerosol-forming substrates are continuously inhaled, due to accumulated radiant heat, a surface temperature of a cigarette device is too high to be used continuously.
In an embodiment, the present invention provides an electromagnetic heating assembly, comprising: a fixing tube with two run-through ends configured to fix an aerosol-forming substrate; a heating body at least partially extending from a first end of the fixing tube into the fixing tube and inserted into the aerosol-forming substrate in the fixing tube; and an induction coil sleeved on a periphery of the fixing tube and configured to generate electromagnetic induction under an energized state so as to cause the heating body to heat, wherein a ratio of a total height of the induction coil to a depth by which the heating body is inserted into the aerosol-forming substrate in the fixing tube ranges from 1:1 to 3:1.
Subject matter of the present disclosure will be described in even greater detail below based on the exemplary figures. All features described and/or illustrated herein can be used alone or combined in different combinations. The features and advantages of various embodiments will become apparent by reading the following detailed description with reference to the attached drawings, which illustrate the following:
In an embodiment, the present invention provides an improved aerosol generation device and an electromagnetic heating assembly thereof.
In an embodiment, the present invention provides an electromagnetic heating assembly, including: a fixing tube with two run-through ends to fix an aerosol-forming substrate, a heating body at least partially extending from a first end of the fixing tube into the fixing tube and inserted into the aerosol-forming substrate in the fixing tube, and an induction coil sleeved on a periphery of the fixing tube to generate electromagnetic induction under an energized state so as to cause the heating body to heat, where
a ratio of a total height of the induction coil to a depth by which the heating body is inserted into the aerosol-forming substrate in the fixing tube ranges from 1:1 to 3:1.
Preferably, the ratio of the total height of the induction coil to the depth by which the heating body is inserted into the aerosol-forming substrate in the fixing tube ranges from 1.2:1 to 1.5:1.
Preferably, the heating body is in a shape of a sheet;
the induction coil is in a shape of a spiral; and
a ratio of an inner diameter of the induction coil to a width of the heating body ranges from 1.2:1 to 3:1.
Preferably, the induction coil includes a first sensing region, a second sensing region, and a third sensing region that are arranged sequentially toward the first end of the fixing tube;
an average inter-turn spacing of the first sensing region is greater than an average inter-turn spacing of the third sensing region; and
the average inter-turn spacing of the third sensing region is greater than an average inter-turn spacing of the second sensing region.
Preferably, the electromagnetic heating assembly further includes a coil fixing cylinder sleeved outside the fixing tube to fix the induction coil, where
the induction coil is wound on the coil fixing cylinder.
Preferably, a plurality of positioning grooves for winding the induction coil to define an inter-turn spacing of the induction coil are provided on an outer side wall of the coil fixing cylinder.
Preferably, the electromagnetic heating assembly further includes a protective film arranged on a periphery of the induction coil and configured to increase an inductance and prevent magnetic leakage.
Preferably, a height of the protective film is greater than the total height of the induction coil.
Preferably, the height of the protective film matches a height of the coil fixing cylinder.
Preferably, a magnetic permeability of the protective film ranges from 500 to 2,000.
Preferably, a thickness of the protective film ranges from 0.1 mm to 0.5 mm.
Preferably, the protective film is a ferrite film.
Preferably, the electromagnetic heating assembly further includes a base arranged on the first end of the fixing tube and configured to mount the heating body.
Preferably, the fixing tube includes a tube body with two run-through ends to fix the aerosol-forming substrate;
the tube body includes a first end for the heating body to penetrate and a second end for the aerosol-forming substrate to pass through;
an engagement portion arranged protruding out of a peripheral wall of the tube body to engage with the coil fixing cylinder is arranged on the second end of the tube body;
a gap between the coil fixing cylinder and the engagement portion forms a first air inlet;
a second air inlet is provided on the peripheral wall of the tube body close to the first end; and
an air inlet channel in communication with the first air inlet and the second air inlet is provided on an inner side of the coil fixing cylinder.
The present application further constructs an aerosol generation device, including a shell, the electromagnetic heating assembly according to the present application and arranged in the shell, and a power supply component arranged in the shell to energize the electromagnetic heating assembly.
Beneficial Effect
The following beneficial effects may be obtained by implementing the aerosol generation device and the electromagnetic heating assembly of the present application: According to the electromagnetic heating assembly, the ratio of the total height of the induction coil to the depth by which the heating body is inserted into the aerosol-forming substrate in the fixing tube is set to range from 1:1 to 3:1, so that distribution of a high temperature region on the heating body can be adjusted, thereby preventing the heating body from being non-available due to an excessively high temperature and further improving the user experience.
In order to have a clearer understanding of the technical features, the objectives, and the effects of the present application, specific implementations of the present application are now illustrated in detail with reference to the accompanying drawings.
It should be understood that, the terms such as “front”, “rear”, “left”, “right”, “upper”, “lower”, “first”, and “second” are used only for ease of describing the technical solutions of the present application, rather than indicating or implying that the mentioned apparatus or component must have a particular difference. Therefore, such terms should not be construed as a limitation to the present application. It should be noted that, when a component is considered to be “connected to” another component, the component may be directly connected to the another component, or an intervening component may be present. Unless otherwise defined, meanings of all technical and scientific terms used in this specification are the same as that usually understood by a person skilled in the technical field to which the present application belongs. In this specification, terms used in this specification of the present application are merely intended to describe objectives of the specific embodiments, but are not intended to limit the present application.
Further, as shown in
Further, in some embodiments, the fixing tube 10 is a hollow structure and includes a tube body 11. The tube body 11 is in a shape of a column with two run-through ends and is arranged in the shell 2 in a longitudinal direction. An inner diameter of the tube body matches an outer diameter of the aerosol-forming substrate 100, and the tube body is configured to fix the aerosol-forming substrate 100. In some embodiments, the tube body 11 includes a first end and a second end. The first end is provided for the heating body 30 to penetrate; and the second is provided for the aerosol-forming substrate 100 to pass through. It should be noted that, the first end of the fixing tube 10 is the first end of the tube body 11; and the second end of the fixing tube 10 is the second end of the tube body 11. In some embodiments, a bottom wall 111 may be provided on an inner side of the tube body 11 close to the first end thereof. A via hole for the heating body 30 to pass through may be provided on the bottom wall 111, and an air inlet hole for an airflow to enter may also be provided on the bottom wall 111. In some embodiments, a second air inlet 112 is provided on a peripheral wall of the tube body 11 close to the first end thereof, and the second air inlet 112 is in communication with the air inlet hole and is configured to transport air to the air inlet hole. An engagement portion 12 is arranged on the second end of the tube body 11. The engagement portion 12 is arranged on the peripheral wall of the tube body 11 and is arranged protruding out of the peripheral wall of the tube body 11, which is configured to engage with the coil fixing cylinder 40. A gap between the engagement portion and the coil fixing cylinder 40 form a first air inlet 113. The first air inlet 113 and the second air inlet 112 are in communication through the coil fixing cylinder 40. It may be understood that, in some embodiments, the engagement portion 12 may be omitted.
Further, in some embodiments, the base 20 is in a shape of a column and is detachably connected to the fixing tube 10. The base 20 includes a top wall and a side wall. An insertion hole is provided on the top wall of the base 20, and the insertion hole is for insertion to the heating body 30.
Further, in some embodiments, the heating body 30 is in a shape of an elongated sheet. It may be understood that, in some other embodiments, the shape of the heating body is not limited to an elongated sheet, but may be a column or a needle. A spire structure is provided on an end of the heating body away from the base 20, and the spire structure is in a shape of a triangle, a wedge, or a cone. The heating body includes a base body 31 and a temperature measuring resistance circuit 32 arranged on the base body 31. The base body 31 is in a shape of a sheet and is made of a magnetically conductive and electrically conductive material. The magnetically conductive and electrically conductive material may be one or more of iron, iron alloy, nickel, nickel alloy, graphite, or iron oxide. The base body is electrically conductive and includes a magnetic induction effect, so that the base body can generate eddy currents to generate heat, after the induction coil 50 releases electromagnetic energy under an energized state, to heat the components in the aerosol-forming substrate 100. The temperature measuring resistance circuit 32 is laid on a surface of the base body 31 and may be integrally formed with the base body 31. Specifically, an insulting layer may be printed on the surface of the base body 31, and the temperature measuring resistance circuit 32 may be arranged on the insulating layer. Currents may be conducted to two ends of the temperature measuring resistance circuit, and a temperature of the base body 31 may be obtained in real time according to a resistance change. It may be understood that, in some other embodiments, the temperature measuring resistance circuit 32 may be omitted.
As shown in
As shown in
Further, in some embodiments, a ratio of an inner diameter d of the induction coil 50 to a width d1 of the heating body 30 may range from 1.2:1 to 3:1. That is, d/d1 ranges from 1.2:1 to 3:1, and the relationship equation decides changes of the heating efficiency. A smaller ratio of the inner diameter d of the induction coil 50 to the width d1 of the heating body 30 indicates a higher heating efficiency. In some embodiments, a value of d1 ranges from 3 mm to 5.5 mm.
As shown in
Still referring to
While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive. It will be understood that changes and modifications may be made by those of ordinary skill within the scope of the following claims. In particular, the present invention covers further embodiments with any combination of features from different embodiments described above and below. Additionally, statements made herein characterizing the invention refer to an embodiment of the invention and not necessarily all embodiments.
The terms used in the claims should be construed to have the broadest reasonable interpretation consistent with the foregoing description. For example, the use of the article “a” or “the” in introducing an element should not be interpreted as being exclusive of a plurality of elements. Likewise, the recitation of “or” should be interpreted as being inclusive, such that the recitation of “A or B” is not exclusive of “A and B,” unless it is clear from the context or the foregoing description that only one of A and B is intended. Further, the recitation of “at least one of A, B and C” should be interpreted as one or more of a group of elements consisting of A, B and C, and should not be interpreted as requiring at least one of each of the listed elements A, B and C, regardless of whether A, B and C are related as categories or otherwise. Moreover, the recitation of “A, B and/or C” or “at least one of A, B or C” should be interpreted as including any singular entity from the listed elements, e.g., A, any subset from the listed elements, e.g., A and B, or the entire list of elements A, B and C.
Number | Date | Country | Kind |
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202020412900.8 | Mar 2020 | CN | national |
This application is a continuation of International Patent Application No. PCT/CN2021/077111, filed on Feb. 20, 2021, which claims priority to Chinese Patent Application No. 202020412900.8, filed on Mar. 26, 2020. The entire disclosure of both applications is hereby incorporated by reference herein.
Number | Date | Country | |
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Parent | PCT/CN2021/077111 | Feb 2021 | US |
Child | 17934936 | US |