CN219353066U - 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 heater having a proximal end and a distal end; the heater is for heating smokable material in the aerosol-forming article to generate an aerosol; a heat insulating member disposed at the periphery of the heater; the insulation has a first end proximate the proximal end and a second end proximate the distal end; a first seal configured to hold and seal the proximal end of the heater and the first end of the insulator; a second seal configured to hold and seal the distal end of the heater and the second end of the insulator. The end of heater and thermal-insulated spare is kept and sealed through first sealing member and second sealing member to this application, does benefit to the modularization of heating element, is convenient for assemble heating element to aerosol-generating device in, still can reduce heating element's cost in addition.

Description

Heating assembly and aerosol-generating device

Technical Field

The application relates to the technical 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.

Disclosure of Invention

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

a heater having a proximal end and a distal end; the heater is for heating smokable material in the aerosol-forming article to generate an aerosol;

a heat insulating member disposed at the periphery of the heater; the insulation has a first end proximate the proximal end and a second end proximate the distal end;

a first seal configured to hold and seal the proximal end of the heater and the first end of the insulator;

a second seal configured to hold and seal the distal end of the heater and the second end of the insulator.

In one example, the thermal shield has an axial extension that is greater than an axial extension of the heater.

In one example, the thermal shield includes an inner tube, an outer tube bonded to an outer surface of the inner tube; one end of the inner tube defines a first end forming the insulation and the other end defines a second end forming the insulation.

In one example, one of inert gas, air, carbon dioxide is sealed between the inner tube and the outer tube; or, vacuumizing between the inner tube and the outer tube; or, a solid heat insulating material is filled between the inner pipe and the outer pipe.

In one example, an infrared reflective layer is disposed on the inner tube or the outer tube.

In an example, the first seal and/or the second seal comprises a first snap-fit connection, and the first end and/or the second end of the insulation has a second snap-fit connection;

the first snap connection cooperates with the second snap connection to retain the first and/or second ends of the insulation.

In an example, the first snap connection comprises a snap groove; the second snap connection comprises a snap formed by bending an end of the first end or the second end of the heat insulation member.

In one example, the catch groove has a guide surface such that the catch member can catch in the catch groove along the guide surface.

In one example, the snap groove includes an extension extending radially outward from the seal, a first baffle extending axially from the extension, and a second baffle extending radially from the first baffle toward the seal.

In one example, the first seal comprises a hollow tube into which the proximal end of the heater protrudes, and an end face of the proximal end of the heater abuts a step formed on an inner surface of the hollow tube to form a seal.

In one example, the second seal includes a body and a protrusion; the distal end of the heater is sandwiched between the body and the projection to form a seal.

In one example, the end of the projection is provided with an air inlet channel through which air can be caused to flow into the bottom end of the aerosol-forming article.

In one example, the projection has a collection cavity thereon for collecting the cooled aerosol.

In one example, a portion of an outer surface of the first seal and/or the second seal abuts a portion of an inner surface of the thermal shield to form a seal.

In one example, a thermal insulation layer is also included that is disposed between the heater and the thermal insulation.

In one example, the heater includes:

a substrate having a surface;

an infrared emitter disposed on the surface; the infrared emitter is for generating infrared light to radiant heat the aerosol-forming article.

In one example, the temperature resistance of the first seal and/or the second seal is 250 ℃ to 350 ℃.

Another aspect of the present application provides a heating assembly comprising:

a heater having a proximal end and a distal end; the heater is for heating smokable material in the aerosol-forming article to generate an aerosol;

a heat insulating member disposed at the periphery of the heater; the insulation has a first end proximate the proximal end and a second end proximate the distal end; the first end is provided with a first buckle connector, and the second end is provided with a second buckle connector;

a first seal disposed at a proximal end of the heater; the first seal has a third snap connection that mates with the first snap connection;

a second seal disposed at a distal end of the heater; the second seal has a fourth snap connection that mates with the second snap connection.

Another aspect of the present application also provides an aerosol-generating device comprising a housing, in which is disposed:

the battery cell is used for providing power;

the heating component.

The heating element and the aerosol generating device provided by the application keep and seal the end parts of the heater and the heat insulation part through the first sealing part and the second sealing part, are favorable for modularization of the heating element, are convenient for assemble the heating element into the aerosol generating device, and can reduce the cost of the heating element in addition.

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 provided in an embodiment of the present application;

fig. 2 is a schematic cross-sectional view of an aerosol-generating device provided in an embodiment of the present application;

FIG. 3 is a schematic view of a heating assembly provided in an embodiment of the present application;

FIG. 4 is an exploded schematic view of a heating assembly provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a heater provided in an embodiment of the present application;

FIG. 6 is a schematic cross-sectional view of a first seal provided in an embodiment of the present application;

FIG. 7 is a schematic cross-sectional view of a second seal provided in an embodiment of the present application;

fig. 8 is a schematic cross-sectional view of a thermal shield provided in an embodiment of the present application.

Detailed Description

In order to facilitate an understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and detailed description. 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 present application in this description 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.

As shown in fig. 1-2, an aerosol-generating device 100 according to an embodiment of the present application includes:

the housing 10 has an accommodating space therein, and the heating element 12, the battery cell 13, the circuit 14, and the like are accommodated in the housing 10.

A chamber 11, at least part of the aerosol-forming article being removably received in the chamber 11 through an opening in the housing 10. In further implementations, the aerosol-generating device 100 further includes a cover that is movable to conceal the opening in the housing 10 to prevent foreign objects from falling into the chamber 11.

A heating assembly 12 for heating the aerosol-forming article received in the chamber 11 so that smokable material in the aerosol-forming article generates a smokable aerosol.

The electrical core 13 provides electrical power for operating the aerosol-generating device 100. For example, the electrical cell 13 may provide electrical power to cause the heating assembly 12 to heat. Furthermore, the battery cell 13 may provide the electrical power needed to operate other elements provided in the aerosol-generating device 100. The battery cell 13 may be a rechargeable battery or a disposable battery.

The circuit 14 may control the overall operation of the aerosol-generating device 100. The circuit 14 controls not only the operation of the battery cell 13 and the heating assembly 12, but also the operation of other elements in the aerosol-generating device 100. For example: the circuit 14 obtains temperature information of the heating element 12 sensed by the temperature sensor 124 and controls the power provided by the battery cell 13 to the heating element 12 based on the information.

As shown in fig. 3-4, the heating assembly 12 includes a heater 121, an electrode connection 122, an electrode connection 123, a temperature sensor 124, a first seal 125, a second seal 126, a thermal insulation layer 127, and a thermal insulation 128.

As shown in fig. 5, the heater 121 includes:

the base 121a is configured in a tubular shape extending in the axial direction of the chamber 11 and surrounding the chamber.

Specifically, the base 121a includes a proximal end and a distal end, and a surface extending between the proximal end and the distal end. The base 121a may be cylindrical, prismatic, or other cylindrical. The substrate 121a is preferably cylindrical and a cylindrical bore extending through the middle of the substrate 121a forms at least part of the chamber 11, the bore having an inner diameter slightly larger than the outer diameter of the aerosol-forming article, to facilitate heating the aerosol-forming article within the chamber 11.

The substrate 121a may be made of a high temperature resistant and transparent material such as quartz, ceramic or mica, and the quartz material is preferably a translucent frosted rigid material; in other examples, other materials with higher infrared transmission may be used, such as: the high temperature resistant material having an infrared transmittance of 95% or more is not particularly limited herein.

An infrared electrothermal coating 121b is formed on the surface of the substrate 121 a. The infrared electrothermal coating 121b may be formed on the outer surface of the substrate 121a or may be formed on the inner surface of the substrate 121 a. In a preferred implementation, infrared electrothermal coating 121b is formed on the outer surface of substrate 121a, with infrared electrothermal coating 121b spaced from both the proximal and distal ends of substrate 121 a.

The infrared electrothermal coating 121b receives electric power to generate heat, and thus generates infrared rays of a certain wavelength, for example: far infrared rays of 8-15 μm. When the wavelength of the infrared light matches the absorption wavelength of the smokable material within the aerosol-forming article, the energy of the infrared light is readily absorbed by the aerosol-forming article. The wavelength of the infrared ray is not limited, and may be an infrared ray of 0.75 μm to 1000. Mu.m, preferably 1.5 μm to 400. Mu.m.

A conductive member including a first electrode 121c and a second electrode 121d disposed on the base 121a at intervals for feeding the electric power to the infrared electrothermal coating 121b.

The first electrode 121c and the second electrode 121d are electrically connected to the infrared electrothermal coating 121b. The first electrode 121c and the second electrode 121d are conductive coatings, and the conductive coatings may be metal coatings, and the metal coatings may include silver, gold, palladium, platinum, copper, nickel, molybdenum, tungsten, niobium, or metal alloy materials thereof.

The first electrode 121c and the second electrode 121d are symmetrically disposed along the central axis of the base 121 a. The first electrode 121c and the second electrode 121d each extend along the axial direction of the base 121a and have a long strip shape. The axial extension of the first electrode 121c and the second electrode 121d are the same as the axial extension of the infrared electrothermal coating 121b. The first electrode 121c and the second electrode 121d divide the infrared electrothermal coating 121b into two sub-infrared electrothermal coatings along the circumferential direction of the substrate 121 a. After the first electrode 121c and the second electrode 121d are electrically conductive, current may flow from one electrode to the other electrode in a substantially circumferential direction of the substrate 121a via the infrared electrothermal coating 112.

The electrode connecting member 122 is held in contact with the first electrode 121c, and the electrode connecting member 123 is held in contact with the second electrode 121d to form an electrical connection. Similar to the electrodes, the electrode connection member extends in the axial direction of the base 121a and has a bar shape. The axial extension of the electrode connection member may be the same as or different from the axial extension of the electrode or the infrared electrothermal coating 121b. The electrode connection may be electrically connected to the cell 13 by wires, for example: one end of the wire is welded on the electrode connecting piece, and the other end of the wire is electrically connected with the battery cell 13. The electrode connecting piece is preferably made of copper, copper alloy, aluminum or aluminum alloy materials with good conductivity, and the surface is plated with silver or gold so as to reduce contact resistance and improve welding performance of the material surface.

The temperature sensor 124 is abutted against the surface of the base 121 a. The temperature sensor 124 includes a thermocouple, an NTC temperature sensor, a PTC temperature sensor; thermocouples are preferably used.

In one example, the outer surface of the base 121a has markings at predetermined locations so that a user can assemble, i.e., position, the temperature sensor 124 to the predetermined locations according to the markings. The marks may be printed or sprayed with paint at predetermined locations. Typically, the predetermined position is located axially intermediate the infrared electrothermal coating 121b. In this way, the optimal temperature for controlling the heater 121 can be obtained by the temperature sensor 124.

The infrared emitter constituted by the infrared electrothermal coating 121b, the first electrode 121c, and the second electrode 121d is not limited to the example of fig. 3. In other examples, the infrared emitter may be formed from a thermally activated infrared radiation layer, or from a thin film construction that may be wound onto the substrate 121a, or the like.

It should also be noted that in other examples, the heater 121 may also be resistive heating, electromagnetic heating, or the like. In the above example, the heater 121 is a circumferential or peripheral heating manner; in other examples, heater 121 may also be a central heating.

A first seal 125 is disposed on the proximal end of the base 121a and a second seal 126 is disposed on the distal end of the base 121 a. The first sealing member 125 and the second sealing member 126 are made of insulating, high-temperature-resistant and heat-insulating flexible materials, such as silica gel materials. Preferably, a silica gel material with the hardness of more than or equal to 60 degrees Shore A is adopted, and the temperature resistance is 250. At a temperature of between 350 DEG C

As will be understood in conjunction with fig. 6, the first sealing member 125 includes a hollow tube 125a, and an extension 125b extending outwardly from an upper end of the hollow tube 125a in a radial direction of the chamber 11. A plurality of ribs (not shown) are provided on the inner surface of the hollow tube 125a at intervals, the ribs being adapted to grip the aerosol-generating article, and external air being able to flow into the chamber 11 from the gaps between adjacent ribs. The extending portion 125b is provided with a stopper portion 125c, and the stopper portion 125c is constituted by a baffle plate (first baffle plate) extending axially from the extending portion 125b, and another baffle plate (second baffle plate) extending radially from the baffle plate toward the hollow tube 125 a. The extension portion 125b and the limit portion 125c define a snap groove. When the first seal 125 is disposed on the proximal end of the base 121a, retention and sealing of the proximal end of the base 121a can be achieved by the first seal 125. Specifically, the proximal end of the base 121a protrudes into the hollow tube 125a, and the end face of the proximal end of the base 121a abuts against a step formed on the inner surface of the hollow tube 125a, and a portion of the outer surface near the proximal end of the base 121a abuts against a portion of the inner surface of the hollow tube 125a, whereby the proximal end of the base 121a can be held and sealed. In this way, aerosols generated within the substrate 121a are avoided from escaping from the gap between the proximal end of the substrate 121a and the first seal 125.

As will be appreciated in conjunction with fig. 7, the second seal 126 includes a body 126a, a protrusion 126b, an extension 126c, and a stop 126d. The body 126a may be provided with slots to allow an electrode connector, leads connected to the electrode connector, leads of a temperature sensor, etc. to pass through and extend out of the heating assembly 12. The projection 126b extends from the body 126a toward the proximal end of the base 121 a. The extension 126c extends outward from the lower end of the body 126a in the radial direction of the chamber 11. The stopper portion 126d is provided on the extension portion 126c, and the stopper portion 126d is constituted by a baffle plate (first baffle plate) extending axially from the extension portion 126c, and another baffle plate (second baffle plate) extending radially from the baffle plate toward the body 126 a. The extension portion 126c and the limit portion 126d define another snap groove. When the second seal 126 is disposed on the distal end of the base 121a, the projection 126b protrudes into the chamber 11, and the distal end of the base 121a is sandwiched between the body 126a and the projection 126 b. In this way, the distal end of the base 121a can be held on the one hand. The other aspect is capable of sealing the distal end of the base 121a by the second seal 126, avoiding the generation of aerosol in the base 121a, and flowing out from the gap between the distal end of the base 121a and the second seal 126.

The projection 126b can provide a stop for the aerosol-forming article when the aerosol-forming article is received within the chamber 11. In further implementations, the projection 126b has a collection cavity 126b1 thereon for collecting the cooled aerosol. The end of the projection 126b is also provided with an air inlet channel through which air can be caused to flow into the bottom end of the aerosol-forming article.

The insulating layer 127 is substantially tubular. The heat insulating layer 127 is sleeved on the base 121a, the upper end of the heat insulating layer 127 is abutted against the end of the first sealing member 125, and the lower end of the heat insulating layer 127 is abutted against the end of the second sealing member 126. Insulation layer 127 is preferably made of an aerogel that is resistant to high temperatures. The heat conductivity coefficient of the aerogel is very low and is about 0.018-0.022W/(m.K), so that the aerogel has good heat insulation performance and effect; the aerogel is free of toxic and harmful gases generated within the temperature range of use of the aerosol-generating device 100. The thickness of the heat insulation layer is 0.1 mm-10 mm.

As will be appreciated in connection with fig. 8, the insulation 128 surrounds the periphery of the insulation layer 127. In a preferred embodiment, the insulation 128 is a double-layered tube, including an inner tube 128a and an outer tube 128b. The inner tube 128a has an axial extension that is greater than the axial extension of the outer tube 128b. The ends of the outer tube 128b are connected to the outer surface of the inner tube 128a at both ends thereof, and may be bonded to the outer surface of the inner tube 128a by welding. The inner tube 128a and the outer tube 128b are preferably made of metal. A gas having a relatively low thermal conductivity, such as an inert gas (e.g., argon), air, carbon dioxide, etc., may be sealed between the inner tube 128a and the outer tube 128 b; vacuum may also be applied or solid insulating materials with a low thermal conductivity may be filled, for example: aerogel materials. In further implementations, an infrared reflective layer may be disposed on the inner tube 128a or the outer tube 128b, such as: an infrared reflecting layer formed of silver, aluminum, chromium, or nickel, etc. to increase the reflectivity of infrared rays, thereby improving the heat insulation performance of the heat insulation member 128. In a preferred implementation, an infrared reflective layer is disposed on the outer surface of the inner tube 128a or the inner surface of the outer tube 128b.

In a preferred embodiment, the inner tube 128a has snap-fit elements 128a1, 128a2 at both ends. The stoppers 128a1 and 128a2 are configured to be arc-shaped and are formed by bending the end of the inner tube 128 a. After assembly, the heat insulating member 128 surrounds a part of the first sealing member 125 and a part of the second sealing member 126, and the fastening member 128a1 at the upper end of the inner tube 128a is fastened in the fastening groove defined by the extending portion 125b and the limiting portion 125c, so that the movement of the hook 128a1, for example, the movement toward the second sealing member 126, can be limited by the baffles of the extending portion 125b and the limiting portion 125 c. Similarly, the latch 128a2 at the lower end of the inner tube 128a is latched in the latch groove defined by the extending portion 126c and the limiting portion 126d, and the baffles of the extending portion 126c and the limiting portion 126d can also limit the movement of the latch 128a2, for example, the movement toward the first sealing member 125. In this way, the assembled heating assembly 12 can be modular, facilitating assembly of the heating assembly 12 into the aerosol-generating device 100.

In further implementation, to facilitate the snap-fit of the snap-fit element 128a1 in the snap-fit groove, another baffle in the limiting portion 125c has an inclined guiding surface thereon. The stopper 126d also has an inclined guide surface.

It should be noted that, the above-mentioned fastening piece, fastening groove, and other fastening connectors are not limited to the above-mentioned example, for example: it is also possible to provide the sealing member with a snap-fit, and the inner tube 128a with a snap-fit groove.

In further implementations, the outer surface of the hollow tube 125a of the first seal 125 also has a convex ring, and the outer surface of the body 126a of the second seal 126 also has a convex ring; the collar abuts the inner surface of the inner tube 128a to form a seal.

In other examples, it is also possible to use a single tube for the insulation 128.

The above-described sealing member may hold the base 121a, the heat insulator 128, and seal the base 121a and the heat insulator 128. Accordingly, no additional seals are required, and the cost of the heating assembly 12 as a whole can be reduced. In addition, the sealing element is made of a silica gel material, and compared with PEEK, PI, PBI and other materials, the sealing element has more cost advantages.

It should be noted that the description and drawings of the present application show preferred embodiments of the present application, but the present application may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations on the content of the present application, but are provided for the purpose of providing a more thorough understanding of the present 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 described in the present specification; further, modifications and variations of the present utility model may occur to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be within the scope of the appended claims.

Claims (19)

1. A heating assembly, comprising:

a heater having a proximal end and a distal end; the heater is for heating smokable material in the aerosol-forming article to generate an aerosol;

a heat insulating member disposed at the periphery of the heater; the insulation has a first end proximate the proximal end and a second end proximate the distal end;

a first seal configured to hold and seal the proximal end of the heater and the first end of the insulator;

a second seal configured to hold and seal the distal end of the heater and the second end of the insulator.

2. The heating assembly of claim 1, wherein the thermal shield has an axial extension that is greater than an axial extension of the heater.

3. The heating assembly of claim 1, wherein the thermal shield comprises an inner tube, an outer tube bonded to an outer surface of the inner tube; one end of the inner tube defines a first end forming the insulation and the other end defines a second end forming the insulation.

4. A heating assembly as claimed in claim 3, wherein one of inert gas, air, carbon dioxide is sealed between the inner tube and the outer tube; or, vacuumizing between the inner tube and the outer tube; or, a solid heat insulating material is filled between the inner pipe and the outer pipe.

5. A heating assembly as claimed in claim 3, wherein an infrared reflecting layer is provided on the inner or outer tube.

6. The heating assembly of claim 1, wherein the first and/or second seal comprises a first snap-fit connection and the first and/or second end of the insulation has a second snap-fit connection;

the first snap connection cooperates with the second snap connection to retain the first and/or second ends of the insulation.

7. The heating assembly of claim 6, wherein the first snap connection comprises a snap groove; the second snap connection comprises a snap formed by bending an end of the first end or the second end of the heat insulation member.

8. The heating assembly of claim 7, wherein the snap groove has a guide surface such that the snap fastener can snap into the snap groove along the guide surface.

9. The heating assembly of claim 7, wherein the snap groove comprises an extension extending radially outward from the seal, a first baffle extending axially from the extension, and a second baffle extending radially from the first baffle toward the seal.

10. The heating assembly of claim 1, wherein the first seal comprises a hollow tube into which the proximal end of the heater extends, and wherein an end face of the proximal end of the heater abuts a step formed on an inner surface of the hollow tube to form a seal.

11. The heating assembly of claim 1, wherein the second seal comprises a body and a protrusion; the distal end of the heater is sandwiched between the body and the projection to form a seal.

12. A heating assembly according to claim 11, wherein the ends of the projections are provided with air inlet slots through which air can be caused to flow into the bottom end of the aerosol-forming article.

13. The heating assembly of claim 11, wherein the projection has a collection chamber thereon for collecting the cooled aerosol.

14. The heating assembly of claim 1, wherein a portion of an outer surface of the first seal and/or the second seal abuts a portion of an inner surface of the thermal shield to form a seal.

15. The heating assembly of claim 1, further comprising a thermal barrier disposed between the heater and the thermal shield.

16. The heating assembly of claim 1, wherein the heater comprises:

a substrate having a surface;

an infrared emitter disposed on the surface; the infrared emitter is for generating infrared light to radiant heat the aerosol-forming article.

17. The heating assembly of claim 1, wherein the temperature resistance of the first seal and/or the second seal is 250 ℃ to 350 ℃.

18. A heating assembly, comprising:

a heater having a proximal end and a distal end; the heater is for heating smokable material in the aerosol-forming article to generate an aerosol;

a heat insulating member disposed at the periphery of the heater; the insulation has a first end proximate the proximal end and a second end proximate the distal end; the first end is provided with a first buckle connector, and the second end is provided with a second buckle connector;

a first seal disposed at a proximal end of the heater; the first seal has a third snap connection that mates with the first snap connection;

a second seal disposed at a distal end of the heater; the second seal has a fourth snap connection that mates with the second snap connection.

19. An aerosol-generating device comprising a housing, wherein:

the battery cell is used for providing power;

the heating assembly of any one of claims 1-18.