EP4284116A1

EP4284116A1 - Coil winding and aerosol generating device

Info

Publication number: EP4284116A1
Application number: EP23170292.9A
Authority: EP
Inventors: Yongjie LUO; Baomin YANG; Jichang FAN
Original assignee: Shenzhen Smoore Technology Ltd
Current assignee: Shenzhen Smoore Technology Ltd
Priority date: 2022-05-23
Filing date: 2023-04-27
Publication date: 2023-11-29
Also published as: CN114931239A; WO2023226587A1; KR20230163291A; JP2023172914A

Abstract

The present invention discloses a coil winding and an aerosol generating device having the same. The coil winding includes a support body (1) and coils (3). An outer surface of the support body (1) is provided with an air groove (2), the coils (3) are wound on the outer surface of the support body (1) and at least partially cover the air groove (2), and an air interlayer is formed by the air groove (2) between the support body (1) and the coils (3).

Description

TECHNICAL FIELD

The present invention relates to the field of aerosol generating devices, in particular to an electromagnetic vaping device, and more particularly to a coil winding with an air interlayer and an aerosol generating device.

BACKGROUND

Aerosol is a colloidal dispersion formed by small solid or liquid masses dispersed and suspended in a gaseous medium. Since the aerosol can be absorbed by the human body through the respiratory system, it provides users with a new alternative absorption method, such as an atomization device that can bake and heat the aerosol-generating substrate of herbs or creams to generate aerosol, which is used in different fields to deliver inhalable aerosols to users, thus replacing conventional product forms and absorption methods.
The conventional baking-type aerosol generating device can also use the electromagnetic induction heating principle to enable the heating element to generate heat to bake and heat the atomized aerosol generating substrate. The principle of electromagnetic induction heating is that an alternating current generated by an induction heating power supply passes through an inductor (i.e. coil) to produce an alternating magnetic field in which a conductive magnetic receptor (i.e. heating element) cuts alternating magnetic lines of force, thus generating an alternating current (i.e. eddy current) inside the heating element, which causes atoms inside the heating element to move at high speed and irregularly, and the atoms collide and rub against each other to generate heat, thereby further heating the aerosol-forming substrate. In the conventional electromagnetic heating aerosol generating devices, one is that a support body with fixed coil winding is directly wound, that is, coils are directly wound on the support body one by one, and the coils are in direct contact with the surface of the support body, the other is that a winding fixing support body is provided for winding the coils, and the inside of the winding fixing support body is a tubular support body. The problem with the former is that the coil is in close contact with the support body, when the heating element inside the support body is heated, heat transfer occurs, causing a temperature of the coils to rise too fast and aggravating the wire loss, or when the inside is insulated, the coils self-heat, since the coils are closely arranged and are also close to the support body, there is no space for the coils to dissipate heat, so that the temperature is too high and the loss of the coils is aggravated. Although the latter can separate the coil and the tubular support body to improve the heat dissipation of the coil, it leads to an increase in parts and a complex structure. More critically, the coil support body 1 dissipates heat too quickly and the energy loss is relatively large.

SUMMARY

A coil referred to in the present invention refers to a circular wire winding, which especially relates to the field of inductance in the present invention.
A first aspect of the present invention provides a coil winding. The coil winding includes a support body and coils, an outer surface of the support body is provided with an air groove, the coils are wound on the outer surface of the support body and at least partially cover the air groove, and an air interlayer is formed by the air groove between the support body and the coils.
In one of the embodiments, a plurality of air grooves are provided. The distribution of the plurality of air grooves is not limited, and can be evenly or unevenly distributed, more specially, the air grooves match the distribution of the coils wound on the support body. That is, the outer surface of the coils covering the support body corresponds to the air grooves, when the gap is provided between the coils, the outer surface of the support body does not need to be provided with the air grooves.
In one of the embodiments, the coils completely cover the air groove. That is, the air groove is completely located between the support body and the coils, and the air groove is not exposed after the coils are wound on the support body.
In one of the embodiments, an axial width of the air groove is less than an axial width of a coil of the coils, a radial depth of the air groove is greater than or equal to 0.1mm. In an embodiment, the axial width and radial depth of the air groove are limited, but the circumferential length of the air groove is not limited. That is, the air groove can be circumferentially extended for a short period. Optionally, the air grooves are provided at all places covered by the coil along the extension direction of the coils.
In one of the embodiments, the outer surface of the support body is further provided with a protrusion arranged between at least two coils of the coils.
In one of the embodiments, a plurality of protrusions are provided.
In one of the embodiments, a radial height of the protrusion is less than or equal to or greater than a radial height of the coils. That is, the number, position, axial width, radial depth, and circumferential length of the protrusions are not limited, as long as the protrusions can be arranged to match the positioning and winding of the coil and the coil can be fixed on the support body. In addition, the positioning of the coil is also conducive to the correspondence between the position of the coil and the air groove.
In one of the embodiments, a gap is provided between at least two coils of the coils. The gaps may be provided between all adjacent coils, optionally only some adjacent coils are provided with gaps, and the gaps can facilitate the heat dissipation of the coils. The function of the protrusion is to position the coil, which ensures that the coil can be arranged in a combination of dense winding and sparse winding, thereby ensuring the stability of the gap.
A second aspect of the present invention provides an aerosol generating device, including the coil winding provided with an air interlayer according to the first aspect of the present invention and a heating element provided inside the support body.
In one of the embodiments, a shielding layer is provided outside the coils.
In one of the embodiments, a top of the support body is provided with an upper cover, and a bottom of the support body is provided with a lower cover.
In one of the embodiments, a temperature measuring component is provided on a surface of the heating element to detect a temperature of the surface of the heating element.
The aerosol generating device of the present invention is an electromagnetic aerosol generating device. In order to ensure the normal use of the aerosol generating device, the aerosol generating device of the present invention also includes conventional power supplies, controllers, casings, etc. for smoking appliances in the field.
Compared with the prior art, the beneficial effects of the present invention are as follows.
1. The outer surface of the support body of the coil winding of the present invention is provided with the air groove, and the coils are wound on the outer surface of the support body and at least partially cover the air groove, and the air interlayer between the coils and the support body is formed by opening the air groove in the support body, so that an air heat insulation layer is formed between the support body and the coils to reduce heat transferring to the coils and reduce the energy loss of the coils.
2. In some embodiments, the outer surface of the support body is further provided with the protrusion, which can position and fix the coils. In addition, the positioning of the coils is conducive to the correspondence between the position of the coil and the air groove.
3. In some embodiments, the gap is provided between at least two coils, thaus the heat of the coils can be dissipated through the gap.
4. After the actual measurement and comparison, the support body with the air grooves in the present invention is compared with the support body with no air grooves in a normal solution, the surface temperature of the coil winding (that is, the temperature of the outermost layer of the heating element) is reduced by 6.53°C, and the surface temperature of a coil lead of the coils is reduced by 4.43°C, which effectively reduces the surface temperature of the coils, thereby achieving the effect of reducing energy loss.
5. After the actual measurement and comparison, the support body with the air grooves in the present invention is about 14mwh lower in energy consumption than a normal solution with the winding fixing support for winding coils, which further reduces the overall energy consumption.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of an aerosol generating device according to an embodiment of the present invention.
FIG. 2 is a partial enlarged view of FIG. 1.
FIG. 3 is another partial enlarged view of FIG. 1.
FIG. 4 is a perspective view of a support body without winding coils according to an embodiment provided of the present invention.
FIG. 5 is a perspective view of the support body of FIG. 4 with winding coils.

Description of reference numbers:
1-support body, 2-air groove, 3-coil, 4-protrusion, 5-gap, 6-heating element, 7-upper cover, 8-lower cover, 9-shielding layer, 10-temperature measuring component.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present invention is further described below with reference to the accompanying drawings and embodiments.
Those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be considered as limiting the scope of the present invention. If no specific technique or condition is indicated in the examples, it shall be carried out according to the technique or condition described in the literature in this field or according to the product specification. The materials or equipment used are not indicated by the manufacturer, and they are all conventional products that can be obtained through purchase.
Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", and "the" used herein may also include plural forms. It should be further understood that the word "includes" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and/or components, but does not exclude 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. Additionally, "connected" as used herein may include wireless connections.
In the description of the present invention, unless otherwise specified, "plurality" means two or more. The orientation or state relationship indicated by the terms "inner", "upper" and "lower" are based on the orientation or status relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "mount", "connection" and "provide" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art will understand the specific meanings of the above terms in the present invention according to specific situations.
Those skilled in the art can understand that, unless otherwise defined, all terms including technical terms and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein

Comparative example 1

A conventional electromagnetic aerosol generating device is provided, which has no air grooves or protrusions on a surface of a coil support. Corresponding coils are directly and closely wound on the coil support in circles, and the coils are in direct contact with the surface of the support.

Comparative example 2

A conventional electromagnetic aerosol generating device is provided, which has a winding fixing support for winding coils. The winding fixing support has a tubular support, on which the coils are closely wound.

Embodiments

As shown in FIGS. 1 to 5, an embodiment of the present invention provides a coil winding and an aerosol generating device including the coil winding.
The coil winding includes a support body 1 and coils 3. An air groove 2 is provided on an outer surface of the support body 1, and the coils 3 are wound on the outer surface of the support body 1 and at least partially cover the air groove 2. An air interlayer is formed by the air groove 2 between the support body 1 and the coils 3. Thus, an air heat insulation layer is formed between the support body 1 and the coils 3 to reduce heat transferring to the coils 3 and reduce the energy loss of the coils 3.
For example, a plurality of air grooves 2 are provided, which matches the distribution of the coils 3 wound on the support body 1. That is, the outer surface of the support body 1 covered by the coils 3 is correspondingly provided with the air grooves 2, and the outer surface of the support body 1 not covered by the coils 3 is not provided with the air grooves 2. For example, in an embodiment, when a gap 5 is provided between two coils of the coils 3, no air groove 2 is provided on the outer surface of the support body 1 corresponding to the gap 5.
For example, the coils 3 completely cover the air groove 2. Since the air groove 2 has been completely covered, the air interlayer between the coils 3 and the support body 1 is relatively airtight, thereby forming the air heat insulation layer between the coils 3 and the support body 1, which can better reduce heat transferring from the support body 1 to the coils 3 and reduce the energy loss of the coils 3.
As shown in FIG. 2, an axial width of the air groove 2 is defined as H1, and an axial width of one coil 3 is defined as H2. When the axial width H1 of the air groove 2 is less than or equal to the axial width H2 of the coil 3, the coil of the coils 3 can relatively seal the air groove 2 on the support body 1. In this way, a relatively sealed air groove 2 is formed between the coils 3 and the support body 1 to achieve the technical effect of using air to insulate heat. For example, the axial width H2 of the coil is 1.65 mm, the axial width H1 of the air groove 2 is 1.0 mm, which is less than the axial width H2 of the coil 3. Further, a radial depth of the air groove 2 is defines as T, which is 0.3mm.
As shown in FIG. 3, for example, the outer surface of the support body 1 is further provided with a protrusion 4, and the protrusion 4 is arranged between at least two coils of the coils 3. One or more protrusions 4 may be provided. The protrusion 4 is configured to assist the winding of the coils 3, and plays a role in fixing and positioning the coil winding. In addition, the positioning of the coils 3 facilitates the correspondence between the coils 3 and the air groove 2. For example, spacing is provided between the coils 3 of the coil winding, so as to achieve a better heat dissipation effect of the coils 3 with self-heating. By configuring the position and size of the protrusions 4, the spacing between two coils of the coil winding can be controlled during winding. In general, the position and size of the protrusion 4 match the size of the coils 3 of the coil winding, so as to achieve a better heat dissipation effect. For example, as shown in FIG. 3, a radial height H3 of the protrusion 4 is 0.5mm, a radial height H4 of the coil is 0.8mm. The radial height H3 of the protrusion 4 is less than the radial height H4 of the coil, so as to better position the coil. Since the protrusion 4 is a part of the support body 1, it will also conduct part of the heat. In another embodiment, the radial height H3 of the protrusion 4 is less than the radial height H4 of the coil, so that the protrusion 4 can position the coil winding and keep the contact between the coils 3 and the support body 1 as small as possible, thus increasing the heat dissipation area of the coils 3 and reducing the heat transfer from the support body 1 to the coils 3.
The gap 5 is provided between at least two coils of the coils 3. The heat of the coils 3 can be dissipated through the gap 5. In an example, a plurality of gaps 5 are provided, and the plurality of the gaps 5 may be uniformly or non-uniformly distributed. For example, as shown in FIG. 1, the coils 3 can be roughly divided into three portions in axial direction thereof, three to four coils are wound at an upper portion and a lower portion, and one coil is wound in a middle portion. One gap 5 is provided between a middle layer coil and upper and lower layer coils, respectively, and the protrusions 4 are provided on both sides of the corresponding middle layer coil. The positioning of the coils 3 and the configuration of the gap 5 are implemented through the protrusions 4. The gap 5 between the upper layer coil or the lower layer coil is less than the gap 5 between the upper layer coil and the middle layer coil, or the lower layer coil and the middle layer coil. That is, the upper and lower layer coils are relatively closely wound, the middle layer coil are sparsely wound, and the spacing between the coils can be gradually changed. In this embodiment, the coils 3 are arranged in a combination of dense winding and sparse winding. The gap 5 can allow the self-heating of the coils to obtain better heat dissipation, so that different heat dissipation methods can be designed according to different products.
The aerosol generating device provided by an embodiment of the present invention includes the coil winding 1 described in the above embodiment. A heating element 6 is provided inside the support body 1. In one embodiment, a shielding layer 9 is provided outside the coils 3. In some embodiments, a top of the support body 1 is provided with an upper cover 7, and a bottom of the support body 1 is provided with a lower cover 8. In some embodiments, a temperature measuring component 10 is also provided on the surface of the heating element 6 to detect a temperature of the surface of the heating element 6.
After the actual measurement and comparison, the support body 1 with the air grooves 2 in the present invention is compared with the support body 1 with no air grooves 2 in Comparative example 1, the surface temperature of the coil winding (that is, the temperature of the outermost layer of the heating element) is reduced by 6.53°C, and the surface temperature of a coil lead of the coils is reduced by 4.43°C. Referring to Table 1, the temperature comparison between Comparative example 1 and the present invention is shown. Table 1: Temperature comparison between the Comparative example 1 and the present invention

Unit: °C

Comparative example 1 the present invention with the air layer difference

surface of the coil winding 91.63 85.10 6.53

surface of the coil lead 84.70 80.27 4.43
After the actual measurement and comparison, the support body 1 with the air grooves 2 in the present invention is about 14mwh lower in energy consumption than Comparative example 2 with the winding fixing support for winding coils. Referring to Table 2, the energy consumption comparison between the Comparative example 2 and the present invention is shown. Table 2: Energy consumption comparison between Comparative example 2 and the present invention.

Unit: mwh

No. 1 No. 2 No. 3 average difference

Comparative example 2 342 344 341 14

the present invention with the air layer 328 327 330
According to the coil winding and the aerosol generating device provided by the embodiments of the present invention, the air layer is formed between the coils 3 and the support body 1 by providing the air grooves on the outer surface of the support body 1, thereby reducing the heat transferring from the support body 1 to the coil. Meanwhile, the gaps 5 are provided between individual coils through the protrusions 4, which is beneficial to the heat dissipation of the coils 3 and reduces energy loss. Compared with the prior art, the energy consumption and the temperature of the coil winding can be significantly reduced, and the energy loss is reduced.

Claims

A coil winding, comprising:
a support body (1), an outer surface of the support body (1) being provided with an air groove (2); and

coils (3) wound on the outer surface of the support body (1) and at least partially covering the air groove (2), wherein an air interlayer is formed by the air groove (2) between the support body (1) and the coils (3).
The coil winding according to claim 1, wherein a plurality of air grooves (2) are provided.
The coil winding according to claim 1, wherein the coils (3) completely cover the air groove (2).
The coil winding according to claim 1, wherein an axial width (H1) of the air groove (2) is less than an axial width (H2) of a coil of the coils (3), a radial depth (T) of the air groove (2) is greater than or equal to 0.1mm.
The coil winding according to claim 1, wherein the outer surface of the support body (1) is further provided with a protrusion (4) arranged between at least two coils of the coils (3).
The coil winding according to claim 5, wherein a plurality of protrusions (4) are provided.
The coil winding according to claim 5, wherein a radial height of the protrusion (4) is less than or equal to or greater than a radial height of the coils (3).
The coil winding according to claim 1, wherein a gap (5) is provided between at least two coils of the coils (3).
The coil winding according to claim 8, wherein a plurality of gaps (5) are uniformly or non-uniformly provided.
The coil winding according to claim 9, wherein the coils (3) comprise an upper layer coil, a middle layer coil, and a lower layer coil, the gap (5) between the upper layer coil or the lower layer coil is less than the gap (5) between the upper layer coil and the middle layer coil, or the lower layer coil and the middle layer coil.
The coil winding according to claim 1, wherein spacing is provided between the coils (3), the spacing between the coils (3) are gradually changed.
An aerosol generating device, comprising the coil winding according to any one of claims 1 to 11, and a heating element (6) provided inside the support body (1).
The aerosol production device according to claim 12, wherein a shielding layer (9) is provided outside the coils (3).
The aerosol production device according to claim 12, wherein a temperature measuring component (10) is provided on a surface of the heating element (6) to detect a temperature of the surface of the heating element (6).
The aerosol production device according to claim 12, wherein a top of the support body (1) is provided with an upper cover (7), and a bottom of the support body (1) is provided with a lower cover (8).