WO2022022522A1

WO2022022522A1 - Aerosol generating device

Info

Publication number: WO2022022522A1
Application number: PCT/CN2021/108708
Authority: WO
Inventors: 戚祖强; 吴涛; 罗家懋; 雷宝灵; 喻宗平; 徐中立; 李永海
Original assignee: 深圳市合元科技有限公司
Priority date: 2020-07-27
Filing date: 2021-07-27
Publication date: 2022-02-03
Also published as: CN213848763U

Abstract

An aerosol generating device (100), comprising an outer shell, wherein the outer shell is internally provided with: a heater, which is used for heating a smokable material (A) received in a chamber (410); and a metal heat dissipation layer, which is located at an inner wall of the outer shell and configured such that heat radially transferred outwards along the chamber (410) by means of the heater is diffused in the lengthwise direction of the outer shell. According to the aerosol generating device (100), by means of the metal heat dissipation layer, the heat transferred outwards by means of the heater is dispersed in the lengthwise direction of the outer shell and transferred to other portions, so as to prevent the accumulation of heat in a part of the outer shell that is opposite a receptor (43).

Description

Aerosol generating device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202021500989.X and the title of "aerosol generating device", which was filed with the Chinese Patent Office on July 27, 2020, the entire contents of which are incorporated into this application by reference.

technical field

The embodiments of the present application relate to the technical field of heat-not-burn electronic cigarettes, and in particular, to an aerosol generating device.

Background technique

Smoking articles (eg, cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. Attempts have been made to replace these tobacco-burning products by making products that release compounds without burning them.

An example of such a product is a heating device that releases a compound by heating rather than burning a material. For example, the material may be tobacco or other non-tobacco products, which may or may not contain nicotine. As another example, there are heating devices that heat a tobacco product by means of a heater to release a compound to form an aerosol. For example, Patent No. 201680049874.3, which is a known technology, proposes a heating device for heating tobacco products through a heater that generates heat by electromagnetic induction. When the above known device is in use, the heat of the heater is radiated or transferred radially outwardly to the casing of the device, thereby increasing the temperature of the casing.

Application content

In order to solve the problem of the increase in the temperature of the casing of the heating device in the prior art, the embodiment of the present application provides an aerosol generating device with the function of preventing the increase of the casing temperature.

Based on the above, the present application proposes an aerosol generating device for heating a smokable material to generate an aerosol; the aerosol generating device includes an outer casing, and the outer casing is provided with: a chamber for receiving the smokeable material material; a heating mechanism for heating the smokeable material received in the chamber; a metal heat dissipation layer positioned on the inner wall of the outer casing and configured to extend along the length of the outer casing is greater than the extension length of the heating mechanism along the length direction of the outer casing; the metal heat dissipation layer is used for diffusing the heat transferred by the heating mechanism radially outward from the chamber toward the length direction of the outer casing.

The above aerosol generating device disperses and transfers the heat transferred from the heating mechanism to other parts along the length direction of the outer casing through the metal heat dissipation layer, thereby preventing temperature accumulation in the part of the outer casing opposite to the susceptor.

In a more preferred implementation, the outer casing is further provided with: a magnetic field generator for generating a changing magnetic field; the heating mechanism is a susceptor that is penetrated by the changing magnetic field to generate heat; an electromagnetic shielding member is positioned on the between the metal heat dissipation layer and the magnetic field generator, and configured to isolate the metal heat dissipation layer from the changing magnetic field.

In a more preferred implementation, the magnetic field generator includes an induction coil positioned coaxially with and surrounding the chamber;

The electromagnetic shield is configured to surround or wrap the induction coil in a circumferential direction of the induction coil.

In a more preferred implementation, the electromagnetic shield includes an electromagnetic shielding film.

In a more preferred implementation, the extension length of the metal heat dissipation layer along the length direction of the outer casing at least partially covers the extension length of the susceptor along the length direction of the outer casing.

In a more preferred implementation, the outer casing includes an upper casing and a lower casing opposite along the length direction;

the upper shell is lengthwise removable from the lower shell to extract smokeable material;

The metal heat dissipation layer includes a first metal heat dissipation layer positioned on the inner wall of the upper casing, and a second metal heat dissipation layer positioned on the inner wall of the lower casing;

When the upper casing is combined with the lower casing, the first metal heat dissipation layer and the second metal heat dissipation layer are in contact with each other and conduct heat.

In a more preferred implementation, the susceptor extends at least partially within the chamber;

The lower casing is also provided with a fixing seat for supporting the susceptor;

The second metal heat dissipation layer includes a first portion close to the fixing along the length direction of the outer casing, and a second portion away from the fixing seat;

The volume of the first portion is smaller than that of the second portion, thereby allowing more heat from the first portion to diffuse to the second portion.

In a more preferred implementation, the extension length of the first part along the length direction of the outer casing at least partially covers the extension length of the fixing seat along the length direction;

The second portion avoids the fixing seat along an extension length along the length of the outer casing.

In a more preferred implementation, the length of the first portion is smaller than the second portion to form a smaller volume than the second portion.

In a more preferred implementation, the thickness of the first portion is smaller than that of the second portion to form a smaller volume than the second portion.

In a more preferred implementation, the thickness of the metal heat dissipation layer ranges from 0.2 to 1 mm.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute limitations of the embodiments, and elements with the same reference numerals in the drawings are denoted as similar elements, Unless otherwise stated, the figures in the accompanying drawings do not constitute a scale limitation.

1 is a schematic structural diagram of an aerosol generating device provided by an embodiment;

Fig. 2 is a three-dimensional cross-sectional schematic diagram of the aerosol generating device of Fig. 1;

3 is a schematic cross-sectional view of the aerosol generating device of FIG. 1 in a disassembled state;

4 is a temperature field distribution diagram of an outer casing without a metal heat dissipation layer tested in an embodiment;

FIG. 5 is a temperature field distribution diagram of an outer casing containing a metal heat dissipation layer tested in an embodiment.

detailed description

In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments.

The structure of the aerosol generating device 100 proposed in an embodiment of the present application can be referred to as shown in FIG. 1 to FIG. 3 , which is used to receive a smokeable material A, such as a cigarette, and heat it to make at least one volatile The components volatilize to form an aerosol for inhalation; based on functional requirements, the structure and functional composition include:

The overall shape of the outer casing is roughly square, that is, the size along the length direction is larger than the size in the width direction, and the size along the width direction is larger than the size in the thickness direction; wherein, the outer casing consists of an upper casing 10 and a lower casing 10 and a lower casing 10 arranged in sequence along the length direction. The housings 20 are cooperatively formed. The outer housing is formed by a proximal end 110 of a portion of the top end of the upper housing 10; in use, the proximal end 110 serves as the end for aspiration and manipulation of the smokeable material A near the user.

The proximal end 110 is further provided with a receiving hole 111 through which the smokeable material A can be received in the outer casing to be heated or removed from the outer casing in use.

A switch button 30 is provided on the lower case 20 .

Referring to FIG. 3 , the upper casing 10 of the outer casing can be removed or separated from the lower casing 20 along the length direction, so as to be used for extracting the smokeable material A. As shown in FIG. Specifically, the upper casing 10 is provided with a cylindrical extractor 13 for accommodating and retaining the smokeable material A, and the smokeable material A is accommodated and maintained in the cylindrical extractor 13 during use; when the upper casing When the 10 is removed from the lower casing 20, the retained smokeable material A can be carried and removed from the lower casing 20, so as to facilitate the extraction of the smokeable material A by the user.

In order to further facilitate the receiving and heating of the smokeable material A, a heating mechanism 40 is provided inside the outer casing, and the heating mechanism 40 includes:

The stent 41 is generally in the shape of a tube extending in the axial direction of the outer casing 10 , and at least a part of the inner hollow of the tube shape forms a chamber 410 for receiving the smokeable material A; Retention and retention can be extended into chamber 410 for heating or removal.

a magnetic field generator comprising an induction coil 42 disposed around at least a portion of the support 41 for generating changes through the chamber 410 when an alternating current is supplied thereto magnetic field;

The susceptor 43, made of a susceptible material, such as permalloy, stainless iron, etc., is configured to be coupled with the changing magnetic field of the induction coil 42, and can be penetrated by the changing magnetic field to generate heat and thereby heat the pumpable material A. Specifically in the preferred implementation shown in FIGS. 2 and 3 in the configuration of a pin or blade extending axially along the chamber 410 , when the smokeable material A is received in the chamber 410 , the susceptor 43 can be inserted into the smokeable material A. The suction material A is heated.

In yet another variant implementation, the susceptor 43 may be configured in a tubular shape surrounding the chamber 410 such that when the smokeable material A is received within the chamber 410, the susceptor 43 may circumferentially surround the smokeable material A in turn heats the smokeable material A from the outside.

Further, a metal heat dissipation layer is arranged on the inner wall of the outer casing, which is used to dissipate or transfer the heat transferred from the susceptor 43 or the chamber 410 to the outer casing in the radial direction along the length direction or to other parts, so as to prevent the heat from spreading between the outer casing and the susceptor. 43 Concentration of radially opposite portions. specific,

The metal heat dissipation layer includes a first metal heat dissipation layer 12 formed on the inner surface of the first plastic outer wall 11 of the upper case 10 ; and a second metal heat dissipation layer 22 formed on the inner surface of the second plastic outer wall 21 of the lower case 20 .

In order to prevent the heat from the susceptor 43 from being transferred to the plastic outer wall, the metal heat dissipation layer basically completely covers the inner surface of the plastic outer wall of the outer casing; and in the length direction of the outer casing, the length of the metal heat dissipation layer is at least partially covered. susceptor 43.

Further, the upper case 10 with the first metal heat dissipation layer 12 or the lower case 20 with the second metal heat dissipation layer 22 can be prepared by in-mold injection molding. The thickness of the first metal heat dissipation layer 12 and/or the second metal heat dissipation layer 22 is about 0.2-1 mm, preferably not more than 1 mm, to avoid greatly increasing the weight of the outer casing and affecting product experience.

In a preferred implementation, the material of the first metal heat dissipation layer 12 and/or the second metal heat dissipation layer 22 is a metal with a high heat dissipation coefficient, such as silver, copper, gold or aluminum and their alloys.

Further in the preferred implementation shown in FIG. 2 , when the upper casing 10 and the lower casing 20 are combined, the ends of the first metal heat dissipation layer 12 and the second metal heat dissipation layer 22 are opposite to each other and are in contact with each other, and further Make them as a whole to form heat conduction through contact, and improve the area and effect of heat diffusion.

In use, the metal heat dissipation layer can absorb the alternating magnetic field generated by the induction coil 42 from the outside, thereby affecting the heating efficiency of the susceptor 43 . Further, the aerosol generating device also includes:

The electromagnetic shielding member 44 extends along the axial direction of the induction coil 42 and surrounds or wraps the induction coil 42 for shielding or twisting the magnetic field lines of the induction coil 42 from the outside, so that the magnetic field generated by the induction coil 42 is concentrated in the cavity as much as possible The chamber 410 is substantially isolated from the first metal heat dissipation layer 12 and/or the second metal heat dissipation layer 22 .

In an optional implementation, the electromagnetic shielding member 44 is a flexible electromagnetic shielding film. After melting, a film with a thickness of 0.2 mm made by a film-making process, in which the particle size of the metal particles is less than 100 nanometers and uniformly dispersed in the plastic material, can realize the performance of magnetic field shielding. Or in another optional implementation, the electromagnetic shielding member 44 is formed on the surface of a flexible substrate such as PI film, PEN film, PEI film, PC film, cloth, paper, etc. by means of deposition, printing or spraying, etc. , Electromagnetic shielding film made of alloy coating of chromium, aluminum, titanium, tin and indium. Or in yet another alternative implementation, the electromagnetic shielding member 44 is a film of a high conductivity, high permeability metal or alloy with a relatively low thickness, such as an Al film, a copper film, a titanium film, or a deposited high permeability film Magnetic thin films such as iron alloys, cobalt alloys, nickel alloys, etc.

Further in the preferred implementation shown in FIG. 3 , the electromagnetic shielding member 44 is surrounded by the induction coil 42, and the extension length along the axial direction of the induction coil 42 is greater than the length of the induction coil 42, so that it can completely The induction coil 42 is surrounded in the axial direction, so that the metal heat dissipation layer can basically completely cover the inner surface of the outer casing, thereby improving the effect of heat dissipation.

In practice, the susceptor 43 is usually installed and fixed in the bracket 41 through a fixing seat 45 , and the part of the outer casing opposite to the fixing seat 45 in the radial direction is the part receiving the most heat from the susceptor 43 . Furthermore, in practice, the fixed seat 45 is preferably made of heat-resistant and low thermal conductivity ceramics such as zirconia ceramics, so as to minimize the heat transfer of the susceptor 43 to the outer casing through the contacting fixed seat 45 as a transfer medium.

Further referring to the preferred implementation shown in FIG. 2 and FIG. 3 , the second metal heat dissipation layer 22 has two parts with different thicknesses, and specifically includes a first part 221 with a thinner thickness above and a thicker part located below The second part 222; in use, the first part 221 is opposite to the fixing seat 45, and then mainly receives the heat transferred by the fixing seat 45; and the second part 222 avoids the fixing seat 45 along the length direction.

2 and 3, the length of the second part 222 is also greater than that of the first part 221, so when the thickness and volume of the second part 222 are larger than those of the first part 221 in use, the second part 222 can relatively have a larger heat capacity and thus more The heat is absorbed and retained from the first part 221 so that the heat of the first part 221 opposite to the fixing seat 45 is evenly distributed as much as possible.

Further, the inner hollow of the lower casing 20 is also provided with conventional necessary functional devices, such as batteries, circuit boards (not shown in the figure) and other components, which are used to supply power and control the operation of the heating mechanism 40 .

The above aerosol generating device disperses and transfers the heat transferred from the susceptor to other parts along the length direction of the outer casing through the metal heat dissipation layer, thereby preventing temperature accumulation in the part of the outer casing opposite to the susceptor.

In yet another variable implementation of the present application, the heating mechanism 40 may also be a resistance heating mechanism including a resistance heater; specifically, a sheet or pin resistance heater is used to replace the above induction coil 42 and susceptor 43, and a The resistive heater provides direct current to heat the smokeable material A to generate heat. In this implementation, when the aerosol generating device does not have a metal heat dissipation layer of aluminum material, the temperature of the casing detected by infrared is shown in Figure 4. The casing temperature is relatively concentrated in the part adjacent to the resistance heater, about 52.9 to 55 degrees. The temperature of other parts is significantly lower than the part adjacent to the resistance heater. After further adding a metal heat dissipation layer of aluminum material on the inner wall of the outer casing, the temperature of the outer casing detected by infrared is shown in Figure 5. The overall temperature of the outer casing is basically uniform, about 40.8 degrees.

It should be noted that the description of the present application and the accompanying drawings provide preferred embodiments of the present application, but are not limited to the embodiments described in the present specification. Improvements or changes are made according to the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present application.

Claims

An aerosol generating device for heating a smokable material to generate an aerosol; it is characterized in that it comprises an outer casing, and the outer casing is provided with:

a chamber for receiving the smokeable material;

a heating mechanism for heating the smokeable material received in the chamber;

a metal heat dissipation layer, positioned on the inner wall of the outer casing and configured to extend along the length direction of the outer casing greater than the extension length of the heating mechanism along the length direction of the outer casing, for heating the heating The heat transferred by the mechanism radially outwardly of the chamber is diffused toward the length of the outer shell.
The aerosol generating device according to claim 1, wherein the outer casing is further provided with:

a magnetic field generator for generating a changing magnetic field; the heating mechanism includes a susceptor that is penetrated by the changing magnetic field and generates heat;

An electromagnetic shield positioned between the metal heat dissipation layer and the magnetic field generator and configured to isolate the metal heat dissipation layer from the changing magnetic field.
3. The aerosol-generating device of claim 2, wherein the magnetic field generator comprises an induction coil positioned coaxially with the chamber and surrounding the chamber;

The electromagnetic shield is configured to surround or wrap the induction coil in a circumferential direction of the induction coil.
4. The aerosol-generating device of claim 3, wherein the electromagnetic shielding member comprises an electromagnetic shielding film.
The aerosol generating device according to any one of claims 2 to 4, wherein the extension length of the metal heat dissipation layer along the length direction of the outer casing at least partially covers the length of the susceptor along the outer casing The extension of the direction.
The aerosol generating device according to any one of claims 2 to 4, wherein the outer casing comprises an upper casing and a lower casing that are opposite to each other in a longitudinal direction;

the upper shell is lengthwise removable from the lower shell to extract smokeable material;

The metal heat dissipation layer includes a first metal heat dissipation layer positioned on the inner wall of the upper casing, and a second metal heat dissipation layer positioned on the inner wall of the lower casing;

When the upper casing is combined with the lower casing, the first metal heat dissipation layer and the second metal heat dissipation layer are in contact with each other and conduct heat.
7. The aerosol-generating device of claim 6, wherein the susceptor extends at least partially within the chamber;

The lower casing is also provided with a fixing seat for supporting the susceptor;

The second metal heat dissipation layer includes a first portion close to the fixing along the length direction of the outer casing, and a second portion away from the fixing seat;

The volume of the first portion is smaller than that of the second portion, thereby allowing more heat from the first portion to diffuse to the second portion.
The aerosol generating device according to claim 7, wherein the extension length of the first portion along the longitudinal direction of the outer casing at least partially covers the extension length of the fixing base along the longitudinal direction;

The second portion avoids the fixing seat along an extension length along the length of the outer casing.
8. The aerosol-generating device of claim 7, wherein the thickness and/or length of the first portion is smaller than that of the second portion to form a smaller volume than the second portion.
The aerosol generating device according to any one of claims 1 to 4, wherein the thickness of the metal heat dissipation layer is between 0.2 and 1 mm.