CN220875953U - Heating assembly and aerosol-generating device - Google Patents

Abstract

The present application provides a heating assembly and an aerosol-generating device, the heating assembly comprising: a magnetic core including a first partial magnetic core, a second partial magnetic core, and a third partial magnetic core; the second part of magnetic core and the third part of magnetic core are arranged on the first part of magnetic core at intervals and are all positioned on the same side of the first part of magnetic core; an inductor at least partially disposed on the first portion of the magnetic core; a susceptor at least partially disposed between the second portion of the magnetic core and the third portion of the magnetic core; the second part of magnetic core is provided with a first outer surface, the third part of magnetic core is provided with a second outer surface which is arranged opposite to the first surface, and the first outer surface and the second outer surface are at least partially curved. According to the application, the curved surfaces of the second part magnetic core and the third part magnetic core surround the susceptor, so that more magnetic field lines can be led to the susceptor, and the heating efficiency of the susceptor is improved.

Description

Heating assembly and aerosol-generating device

Technical Field

The application relates to the field of electronic atomization, in particular to a heating component and an aerosol generating device.

Background

Smoking articles such as cigarettes and cigars burn tobacco during use to produce smoke. Attempts have been made to provide alternatives to these tobacco-burning articles by creating products that release compounds without burning. An example of such a product is a so-called heated non-combustible product, which releases a compound by heating tobacco rather than burning tobacco.

There is an aerosol-generating device in which a varying magnetic field is generated by an induction coil to cause a susceptor to heat an aerosol-generating article. The problem with this device is that the susceptor power is low and the heating efficiency is low.

Disclosure of utility model

The application provides a heating assembly and an aerosol generating device, which are used for improving the heating efficiency of a susceptor.

In one aspect, the application provides a heating assembly comprising:

A magnetic core including a first partial magnetic core, a second partial magnetic core, and a third partial magnetic core; the second part magnetic core and the third part magnetic core are arranged on the first part magnetic core at intervals and are all positioned on the same side of the first part magnetic core;

An inductor disposed at least partially on the first portion of the magnetic core; the inductor is configured to generate a varying magnetic field under an alternating current;

A susceptor at least partially disposed between the second portion of magnetic core and the third portion of magnetic core; the susceptor is configured to be penetrated by the varying magnetic field to generate heat to heat the aerosol-generating article to generate an aerosol;

The second part magnetic core is provided with a first outer surface, the third part magnetic core is provided with a second outer surface which is opposite to the first outer surface, and the first outer surface and the second outer surface are at least partially curved.

In an example, the distance between the first outer surface and the outer surface of the susceptor is the same as the distance between the second outer surface and the outer surface of the susceptor.

In one example, the curved surface is spaced from the outer surface of the susceptor by a distance of between 0.1mm and 1mm.

In one example, the first outer surface and the second outer surface are two different portions of a fitted cylindrical surface.

In one example, the centerline of the cylinder corresponding to the cylindrical surface is parallel or coincident with the centerline of the susceptor.

In an example, a maximum distance between a first arc on the first outer surface and a chord corresponding to the first arc is between 0.5mm and 4.5mm; and/or the maximum distance between the second circular arc on the second outer surface and the chord corresponding to the second circular arc is 0.5 mm-4.5 mm.

In an example, a maximum distance between a first arc on the first outer surface and a chord corresponding to the first arc is the same as a maximum distance between a second arc on the second outer surface and a chord corresponding to the second arc.

In an example, the outer surfaces of the second part of the magnetic core except the first outer surface are all plane surfaces, and the outer surfaces of the third part of the magnetic core except the second outer surface are all plane surfaces.

In one example, the first portion of the magnetic core has an outer surface proximate the susceptor, a centerline of the susceptor being perpendicular or parallel to the outer surface of the first portion of the magnetic core.

In an example, the susceptor is configured as a tubular structure to heat around at least a portion of the aerosol-generating article; or the susceptor is configured to be inserted into the aerosol-generating article for heating.

In an example, the second portion of the magnetic core extends from one end of the first portion of the magnetic core in a direction away from the first portion of the magnetic core, and the third portion of the magnetic core extends from the other end of the first portion of the magnetic core in a direction away from the first portion of the magnetic core.

In an example, the extending direction of the second part core is parallel to the extending direction of the third part core.

In one example, the first portion core, the second portion core, and the third portion core are formed in a shape that is substantially U-shaped.

In another aspect the application provides an aerosol-generating device comprising:

a chamber for removably receiving an aerosol-generating article;

The heating component.

According to the heating component and the aerosol generating device, the curved surfaces of the second part of magnetic core and the third part of magnetic core surround the susceptor, so that more magnetic field lines can be led to the susceptor, and the heating efficiency of the susceptor is improved.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures are not to scale, unless expressly stated otherwise.

Fig. 1 is a schematic view of an aerosol-generating device according to an embodiment of the present application;

Fig. 2 is a schematic view of another aerosol-generating device according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a heating assembly according to an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of a heating assembly according to an embodiment of the present application;

FIG. 5 is a schematic illustration of a simulation of magnetic field lines of a heating assembly provided in accordance with an embodiment of the present application;

FIG. 6 is a schematic top view of a heating assembly according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a power curve of a susceptor provided by an embodiment of the present application;

FIG. 8 is another magnetic field line simulation schematic of a heating assembly provided in accordance with an embodiment of the present application;

FIG. 9 is a schematic illustration of yet another magnetic field line simulation of a heating assembly provided in accordance with an embodiment of the present application;

FIG. 10 is a schematic illustration of still another magnetic field line simulation of a heating assembly provided in accordance with an embodiment of the present application;

FIG. 11 is another power curve schematic of a susceptor provided by an embodiment of the present application;

FIG. 12 is a schematic view of another heating assembly provided in an embodiment of the present application;

fig. 13 is a schematic cross-sectional view of another heating assembly provided in an embodiment of the present application.

Detailed Description

In order that the application may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "upper", "lower", "left", "right", "inner", "outer" and the like are used in this specification for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

Fig. 1 is a schematic view of an aerosol-generating device according to an embodiment of the present application. The aerosol-generating device comprises:

a chamber 10, the aerosol-generating article being removably received within the chamber 10.

Susceptor 20 extends axially along chamber 10 and at least partially surrounds chamber 10. The susceptor 20 is of tubular construction. The susceptor 20 may be heated about at least a portion of the aerosol-generating article received in the chamber 10 to generate a smokable aerosol.

An inductor 30 for generating a varying magnetic field under alternating current such that the susceptor 20 heats up under penetration of the varying magnetic field.

Depending on the arrangement in use of the product, the inductor 30 may comprise a cylindrical coil wound in a spiral. The helically wound cylindrical coil may have a radius r in the range of about 5mm to about 10mm, and in particular the radius r may be about 7mm. The length of the helically wound cylindrical coil may be in the range of about 8mm to about 14mm, with the number of turns of the coil being in the range of about 8 turns to 15 turns. Accordingly, the internal volume may be in the range of about 0.15cm ³ to about 1.10cm ³.

A support 40 disposed between susceptor 20 and inductor 30. The material of the bracket 40 may include a high temperature resistant nonmetallic material such as PEEK or ceramic, etc.

A battery cell 50 for providing a direct current; preferably, the battery 50 is a rechargeable battery.

A circuit 60 electrically connected to the battery cell 50 for converting the direct current output from the battery cell 50 into an alternating current having a suitable frequency and supplying the alternating current to the inductor 30.

In a preferred implementation, the frequency of the alternating current supplied by circuit 60 to inductor 30 is between 80KHz and 400KHz; more specifically, the frequency may be in the range of about 200KHz to 300 KHz.

Fig. 2 is a schematic view of another aerosol-generating device according to an embodiment of the present application. Unlike the example of fig. 1, at least a portion of the susceptor 20 extends within the chamber 10 for insertion into an aerosol-generating article received in the chamber 10 for heating.

In a preferred embodiment, the susceptor 20 is generally in the shape of a pin or blade, and is thus advantageous for insertion into an aerosol-generating article; meanwhile, the susceptor 20 may have a length of about 12 mm, a width of about 4 mm and a thickness of about 0.5 mm, and may be made of grade 430 stainless steel (SS 430). As an alternative embodiment, susceptor 20 may have a length of about 12 millimeters, a width of about 5 millimeters, and a thickness of about 0.5 millimeters, and may be made of grade 430 stainless steel (SS 430). Susceptor 20 may also be made of grade 420 stainless steel (SS 420), an alloy material containing iron/nickel (e.g., permalloy).

Fig. 3-4 are schematic cross-sectional views of a heating assembly according to an embodiment of the present application.

As shown in fig. 3-4, the heating assembly includes susceptor 20, inductor 30, and magnetic core 70 (shown by solid arrows). The susceptor 20 and the inductor 30 may refer to fig. 1 and the description thereof.

The magnetic core 70 may be manganese zinc ferrite, manganese magnesium ferrite, nickel zinc ferrite or cobalt zinc barium ferrite. The magnetic core 70 has a substantially U-shape, and the magnetic core 70 includes a first partial magnetic core 71, a second partial magnetic core 72, and a third partial magnetic core 73.

First portion magnetic core 71 extends horizontally (both horizontally and vertically are directions shown in the drawing). The first partial core 71 has a rectangular parallelepiped shape.

The second part magnetic core 72 and the third part magnetic core 73 are arranged on the first part magnetic core 71 at intervals and are all positioned on the same side of the first part magnetic core 71; i.e., on the upper side of the top surface of first portion magnetic core 71. Specifically, second portion core 72 extends vertically or axially from one end of first portion core 71 (or a portion of the top surface of first portion core 71), i.e., in a direction away from first portion core 71. The third partial core 73 extends vertically or axially from the other end of the first partial core 71 (or the other partial top surface of the first partial core 71), as well as in a direction away from the first partial core 71. The extending direction of the second partial core 72 is parallel to the extending direction of the third partial core 73.

In a preferred embodiment, the second part core 72 and the third part core 73 are substantially identical in structure and are symmetrically disposed on the first part core 71. The outer surfaces of the second part core 72 and the third part core 73 which are substantially columnar and oppositely arranged are at least partially curved, for example, the outer surface 72a of the second part core 72 and the outer surface 73a of the third part core 73 are oppositely arranged and are curved; while the other outer surfaces of the second part core 72 and the other outer surfaces of the third part core 73 are planar. In a further preferred embodiment, the outer surface 72a of the second part core 72 and the outer surface 73a of the third part core 73 are two different parts of a fitted cylindrical surface (see fig. 6, where the solid line parts are the outer surface 72a of the second part core 72 and the outer surface 73a of the third part core 73, and the dotted line parts are other parts of the fitted cylindrical surface), and the center line of the cylinder corresponding to or enclosed by the cylindrical surface is parallel to or coincides with the center line of the susceptor 20.

Inductor 30 is disposed on first portion magnetic core 71, for example, inductor 30 made of an induction coil is wound on first portion magnetic core 71, or an induction line is printed on first portion magnetic core 71. Fig. 5 is a schematic diagram of magnetic field line simulation of a heating assembly according to an embodiment of the present application. As can be seen from the figure, after being energized, the magnetic core 70 can concentrate the magnetic field lines generated by the inductor 30 and guide the magnetic field lines to the susceptor 20, so as to facilitate the heating efficiency of the susceptor 20. It will be appreciated that in other examples, inductor 30 may also be disposed on second portion core 72 and/or third portion core 73.

Susceptor 20 is vertically disposed entirely within magnetic core 70. The upper end of susceptor 20 is disposed near the upper end face of second portion core 72 or third portion core 73, and the lower end of susceptor 20 is disposed near the top face of first portion core 71. Susceptor 20 is positioned between second portion core 72 and third portion core 73 such that the centerline of susceptor 20 is perpendicular to the top surface of first portion core 71, i.e., the centerline of susceptor 20 is at 90 ° to the top surface of first portion core 71. It will be appreciated that in other examples susceptor 20 is disposed obliquely in magnetic core 70 in a vertical direction, i.e., the centerline of susceptor 20 is at an acute or obtuse angle to the top surface of first portion magnetic core 71, as well.

As shown in fig. 6, the maximum distance between the circular arc 72b on the outer surface 72a and the chord 72c corresponding to the circular arc 72b is D1, and the distance between the outer surface 72a and the outer surface of the susceptor 20 is D2; the maximum distance between the arc 73b on the outer surface 73a and the chord 73c corresponding to the arc 73b is d1 and the distance between the outer surface 73a and the outer surface of the susceptor 20 is d2.

In general, D1 is the same as D1, and D1 or D1 is from 0.5mm to 4.5mm, or from 0.5mm to 4.2mm, or from 1mm to 4.2mm, or from 2mm to 4.2mm, or from 3mm to 4.2mm, or from 4mm to 4.2mm. The value of D2 is the same as the value of D2, and the value of D2 or D2 is between 0.1mm and 1mm, or between 0.1mm and 0.8mm, or between 0.1mm and 0.6mm, or between 0.1mm and 0.4mm, or between 0.1mm and 0.2mm.

By reasonably setting the values of D1 (D1) and D2 (D2), more magnetic field lines can be led to the susceptor 20, which is beneficial to improving the heating efficiency of the susceptor 20.

Taking D1 as an example (D1 is similar), when the value of D1 is small, the outer surface 72a of the second partial core 72 tends to be planar, and the circular arc 72b on the outer surface 72a tends to be straight. At this point, the susceptor 20 is placed in a parallel magnetic field scenario, with relatively few magnetic field lines leading to the susceptor 20, which corresponds to less power. As the value of D1 increases, the magnetic field lines directed to susceptor 20 will increase, as will their corresponding power. However, when the value of D1 reaches a certain value, the magnetic field lines leading to the susceptor 20 will decrease and the corresponding power will decrease due to the increased leakage at the upper end of the second part core 72. The corresponding curve of the value of D1 versus susceptor 20 power can be seen with reference to fig. 7, where it can be seen that after the value of D1 reaches 4.1mm, the susceptor 20 power will decrease. Fig. 8 is a schematic diagram of the magnetic field line simulation of the heating element at a value of D1 of 0.64mm, fig. 9 is a schematic diagram of the magnetic field line simulation of the heating element at a value of D1 of 4.1mm, and fig. 10 is a schematic diagram of the magnetic field line simulation of the heating element at a value of D1 of 4.69 mm.

Taking D2 as an example (D2 is similar), when the value of D2 is larger, the distance between the second part of the magnetic core 72 and the susceptor 20 is larger, the magnetic field lines leading to the susceptor 20 are relatively smaller, and the corresponding power is smaller. When the value of D2 is smaller, the distance of the second part core 72 from the susceptor 20 is smaller, and the magnetic field lines leading to the susceptor 20 are relatively more, which corresponds to a larger power. The corresponding curve of the value of D2 versus susceptor 20 power is shown with reference to fig. 11.

In fig. 7 or 11, the power value (the parameter value on the vertical axis) of susceptor 20 is a test value, which is measured based on the same preset value of the power supplied to inductor 30.

Fig. 12 and 13 are schematic cross-sectional views of another heating assembly according to an embodiment of the present application.

Unlike the example of fig. 3, susceptor 20 is disposed horizontally in magnetic core 70, i.e., the centerline of susceptor 20 is parallel to the top surface of first portion of magnetic core 71.

Similar to the example of fig. 3, by reasonably setting the values of D1 (D1) and D2 (D2), more magnetic field lines can be directed to susceptor 20, facilitating an increase in the heating efficiency of susceptor 20. Reference is made in particular to the description of the examples given above.

It should be noted that while the present application has been illustrated in the drawings and described in connection with the preferred embodiments thereof, it is to be understood that the application may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but are to be construed as providing a full breadth of the disclosure. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present application described in the specification; further, modifications and variations of the present application may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this application as defined in the appended claims.

Claims (14)

1. A heating assembly, comprising:

A magnetic core including a first partial magnetic core, a second partial magnetic core, and a third partial magnetic core; the second part magnetic core and the third part magnetic core are arranged on the first part magnetic core at intervals and are all positioned on the same side of the first part magnetic core;

An inductor disposed at least partially on the first portion of the magnetic core; the inductor is configured to generate a varying magnetic field under an alternating current;

A susceptor at least partially disposed between the second portion of magnetic core and the third portion of magnetic core; the susceptor is configured to be penetrated by the varying magnetic field to generate heat to heat the aerosol-generating article to generate an aerosol;

The second part magnetic core is provided with a first outer surface, the third part magnetic core is provided with a second outer surface which is opposite to the first outer surface, and the first outer surface and the second outer surface are at least partially curved.

2. The heating assembly of claim 1, wherein a distance between the first outer surface and an outer surface of the susceptor is the same as a distance between the second outer surface and an outer surface of the susceptor.

3. The heating assembly of claim 1, wherein the curved surface is spaced from the outer surface of the susceptor by a distance of between 0.1mm and 1mm.

4. The heating assembly of claim 1, wherein the first outer surface and the second outer surface are two different portions of a fitted cylindrical surface.

5. The heating assembly of claim 4, wherein a centerline of the cylindrical body corresponding to the cylindrical surface is parallel or coincident with a centerline of the susceptor.

6. The heating assembly of claim 4, wherein a maximum distance between a first arc on the first outer surface and a chord corresponding to the first arc is between 0.5mm and 4.5mm; and/or the maximum distance between the second circular arc on the second outer surface and the chord corresponding to the second circular arc is 0.5 mm-4.5 mm.

7. The heating assembly of claim 6, wherein a maximum distance between a first arc on the first outer surface and a chord corresponding to the first arc is the same as a maximum distance between a second arc on the second outer surface and a chord corresponding to the second arc.

8. The heating assembly of claim 1, wherein the outer surfaces of the second portion of the magnetic core other than the first outer surface are planar and the outer surfaces of the third portion of the magnetic core other than the second outer surface are planar.

9. The heating assembly of claim 1, wherein the first portion of magnetic core has an outer surface proximate the susceptor, a centerline of the susceptor being perpendicular or parallel to the outer surface of the first portion of magnetic core.

10. A heating assembly according to claim 1, wherein the susceptor is configured as a tubular structure to heat around at least part of the aerosol-generating article; or the susceptor is configured to be inserted into the aerosol-generating article for heating.

11. The heating assembly of claim 1, wherein the second portion of magnetic core extends from one end of the first portion of magnetic core in a direction away from the first portion of magnetic core, and the third portion of magnetic core extends from the other end of the first portion of magnetic core in a direction away from the first portion of magnetic core.

12. The heating assembly of claim 11, wherein the direction of extension of the second portion of magnetic core is parallel to the direction of extension of the third portion of magnetic core.

13. The heating assembly of claim 11, wherein the first portion core, the second portion core, and the third portion core are generally U-shaped in configuration.

14. An aerosol-generating device, comprising:

a chamber for removably receiving an aerosol-generating article;

a heating assembly as claimed in any one of claims 1 to 13.