CN216983604U - Gas mist generating device and heater for gas mist generating device - Google Patents

Abstract

An aerosol-generating device and a heater for an aerosol-generating device; wherein the aerosol-generating device comprises: a chamber for receiving an aerosol-generating article; a heater extending at least partially within the chamber for insertion into an aerosol-generating article to heat the aerosol-generating article; the heater has a free front end located within the chamber and a distal end facing away from the free front end; the heater includes: a housing member extending between a free front end and a distal end and at least partially defining an outer surface of the heater; the housing element is formed from a winding of a sheet material comprising a metal or alloy. In the above aerosol-generating device, the housing element of the heater is formed by winding a sheet of material having a metal or alloy, which is more convenient to manufacture than a conventional moulded or machined ceramic, stainless steel housing.

Description

Gas mist generating device and heater for gas mist generating device

Technical Field

The embodiment of the application relates to the technical field of heating non-combustion smoking set, in particular to an aerosol generating device and a heater for the aerosol generating device.

Background

Smoking articles (e.g., 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.

An example of such a product is a heating device that releases a compound by heating rather than burning the material. For example, the material may be tobacco or other non-tobacco products, which may or may not contain nicotine. In the known art, patent CN202010054217.6 proposes heating tobacco products with a heater that encapsulates a spiral heating wire within a molded or machined ceramic or stainless steel outer sleeve to generate an aerosol.

SUMMERY OF THE UTILITY MODEL

An embodiment of the present application provides an aerosol-generating device configured to heat an aerosol-generating article to generate an aerosol; the method comprises the following steps:

a chamber for receiving an aerosol-generating article; and

a heater extending at least partially within the chamber for insertion into an aerosol-generating article to heat the aerosol-generating article; the heater has a free front end located within the chamber and a distal end facing away from the free front end;

wherein the heater comprises:

a housing element extending between the free front and rear ends and at least partially defining an outer surface of the heater; the housing member is formed by winding a sheet material comprising a metal or an alloy.

In a more preferred implementation, the sheet is continuous.

In a more preferred embodiment, the housing element comprises 2 to 10 wound layers.

In a more preferred implementation, the housing element is configured in a tubular shape wound from a sheet comprising a metal or alloy.

In a more preferred embodiment, the thickness of the housing element is 0.1 to 0.5 mm.

In a more preferred implementation, the outer surface of the housing element is closed or sealed.

In a more preferred implementation, the sheet comprises gold, silver, copper, aluminum, or alloys thereof; these metals or alloys have a relatively higher thermal conductivity than other metals or alloys, which is advantageous for faster heat transfer to the aerosol-generating article.

In a more preferred implementation, the sheet comprises:

a metal or alloy layer;

a stress compensation layer bonded to the metal or alloy layer for providing stress compensation in the winding of the sheet material to prevent cracking or breaking of the metal or alloy layer.

In a more preferred implementation, the stress compensation layer is flexible.

In a more preferred embodiment, the thickness of the metal or alloy layer is 0.5 to 30 μm.

In a more preferred implementation, the heater further comprises:

a base at least partially received within the housing member and extending along a length of the heater;

a resistive heating element housed within the housing element and surrounding at least a portion of the substrate.

In a more preferred embodiment, the base body comprises a first section and a second section arranged in sequence;

wherein the content of the first and second substances,

the first section is proximate to and defines the free front end;

the shell element at least partially surrounds the second section and exposes the first section.

In a more preferred implementation, the resistive heating element is bonded to the outside of the second section and surrounds at least a portion of the second section.

In a further preferred embodiment, the housing element is configured to abut against the resistance heating element and hold the resistance heating element outside the base body.

In a more preferred implementation, the housing element is configured to in turn heat the aerosol-generating article by receiving heat from the resistive heating element.

Yet another embodiment of the present application also proposes an aerosol-generating device configured to heat an aerosol-generating article to generate an aerosol; the method comprises the following steps:

a chamber for receiving an aerosol-generating article; and

a heater extending at least partially within the chamber for insertion into an aerosol-generating article to heat the aerosol-generating article; the heater having a free front end for insertion into an aerosol-generating article and a tip facing away from the free front end;

wherein the heater comprises:

a base extending between the free leading end and the trailing end; the base includes a first section proximate the free leading end, and a second section proximate the terminal end;

a resistive heating coil coupled to an outer side of the second section and surrounding at least a portion of the second section;

a housing element surrounding at least a portion of the resistive heating coil and exposing the first section; the shell element comprises at least two wound layers formed from a continuous winding of sheet material.

In a more preferred implementation, the cross-section of the wire material of the resistive heating coil has a first dimension extending in an axial direction and a second dimension extending in a radial direction; the first size is greater than the second size.

In a more preferred implementation, the sheet comprises at least one of a metal or alloy, a ceramic, and a glass.

Yet another embodiment of the present application also proposes a heater for an aerosol-generating device, the heater being configured as a pin or needle or sheet and having free leading and trailing ends facing away in a length direction; wherein the heater comprises:

a housing element extending between the free front and rear ends and at least partially defining an outer surface of the heater; the housing element comprises at least two wound layers of sheet material having a metal or alloy.

In the above aerosol-generating device, the housing element of the heater is wound from a sheet of material having a metal or alloy, which is more convenient to manufacture than a conventional moulded or machined ceramic, stainless steel housing.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings which correspond to and are not to be construed as limiting the embodiments, in which elements having the same reference numeral designations represent like elements throughout, and in which the drawings are not to be construed as limiting in scale unless otherwise specified.

Figure 1 is an aerosol-generating device provided in accordance with an embodiment;

FIG. 2 is a schematic view of one embodiment of the heater of FIG. 1;

FIG. 3 is a schematic illustration of a cross-section of the housing member of FIG. 2;

FIG. 4 is a schematic illustration of the housing member of FIG. 3 after deployment;

FIG. 5 is a schematic view of a further embodiment of a resistive heating element;

FIG. 6 is a schematic view of another embodiment of the heater of FIG. 1.

Detailed Description

To facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and detailed description.

An embodiment of the present application provides an aerosol-generating device, the configuration of which can be seen in fig. 1, including:

a chamber having an opening 40; in use, the aerosol-generating article a is removably receivable within the chamber through the opening 40 of the chamber;

a heater 30 extending at least partially within the chamber, heating being inserted into the aerosol-generating article a when the aerosol-generating article a is received within the chamber, such that the aerosol-generating article a releases a plurality of volatile compounds, and the volatile compounds are formed only by the heating process;

the battery cell 10 is used for supplying power;

a circuit 20 for conducting current between the cell 10 and the heater 30.

In a preferred embodiment, the heater 30 is generally in the shape of a pin or needle or rod or column or sheet or plate, and is further advantageous for insertion into the aerosol-generating article a; meanwhile, the heater 30 may have a length of about 12 to 20 mm and an outer diameter of about 2 to 4 mm.

Further in alternative implementations, the aerosol-generating article a preferably employs a tobacco-containing material that releases volatile compounds from the substrate upon heating; or it may be a non-tobacco material that is suitable for electrically heated smoking after heating. The aerosol-generating article a preferably employs a solid substrate, which may comprise one or more of a powder, granules, shredded strips, strips or flakes of one or more of vanilla leaves, tobacco leaves, homogenised tobacco, expanded tobacco; alternatively, the solid substrate may contain additional tobacco or non-tobacco volatile flavour compounds to be released when the substrate is heated.

In practice, the heater 30 may generally include a resistive heating element, and an auxiliary substrate to assist in the fixed preparation of the resistive heating element, and the like. For example, in some implementations, the resistive heating element is in the shape or form of a helical coil. Or in yet other implementations, the resistive heating elements are in the form of electrically conductive traces bonded to the substrate. Or in yet other implementations, the resistive heating element is in the shape of a substrate of a sheet.

Further figures 2 to 4 show schematic views of an embodied heater 30; the heater 30 of this embodiment includes:

a base 32c, which is made of rigid material such as ceramic or stainless steel, and extends along the length of the heater 30; base 32c has a section 321c and a section 322 c. Wherein the section 321c is of a tapered shape with a gradually decreasing outer diameter and defines a free front end 310c of the heater 30; section 322c is a rod or bar having a substantially constant outer diameter.

Resistive heating elements 31c, such as resistive heating coils, surround section 322c of substrate 32 c.

In some alternative implementations, the resistive heating element 31c is a conventional circular-section resistance heating coil wound with a wire material; or in some preferred implementations, the resistive heating coil is a resistive heating coil wound from a wire material having a flattened or rectangular cross-section. Such as the resistance heating coil 31e shown in fig. 5, the wire material has a larger extension in the axial direction than in the radial direction, so that the resistance heating coil 31e of the spiral coil configuration is flattened in the axial direction; for the transfer of heat. In one specific implementation, the wire material of the resistance heating coil 31e has an extension of 0.25 to 2mm in the axial direction and an extension of 0.05 to 0.2mm in the radial direction.

In the design of the power supply structure to the resistance heating element 31c, the heater 30 includes:

an electrode ring 33c proximate the tip 320c and surrounding at least a portion of the substrate 32 c;

the substrate 32c is made of a conductive material, such as stainless steel, nickel-iron alloy, etc.;

the upper end of the resistance heating element 31c near the free front end 310c is connected and conducted with the base 32c at the connection position B1 by welding, crimping or the like; the lower end of the resistance heating element 31c near the end 320c is connected and conducted with the electrode ring 33c at the connection position B2 by welding, crimping or the like;

a first lead 341c connected and electrically connected to the base 32c at a connection position B3 by welding, crimping, or the like, and indirectly electrically connected to the upper end of the resistance heating element 31 c;

a second lead wire 342c, which is connected and conducted to the electrode ring 33c at a connection position B4 by welding, crimping, or the like, and is further indirectly conducted to the lower end of the resistance heating element 31 c;

the resistive heating element 31c may then be powered by connecting the first and second leads 341c, 342c to the circuit 20.

And, the heater 30 further includes:

a housing element 35c surrounding the resistive heating element 31c and a section 322c of the base 32 c; the housing element 35c is kept clear of the section 321c of the base body 32c and the electrode ring 33 c. After assembly, the resistance heating element 31c is restrained and held by the housing element 35c on the section 322c of the base 32c, preventing the resistance heating element 31c from loosening or moving. At the same time, the outer surface of the heater 30 is at least partially bounded by the housing element 35c after assembly.

Further fig. 3 shows a schematic view of a section of the housing element 35c, fig. 4 shows a schematic view of the housing element 35c after unfolding; the housing element 35c is formed from a continuous foil or sheet that is wound or formed over the resistive heating element 31 c. In practice, the foils or sheets forming the housing member 35c are metal foils (e.g., stainless steel foil, NiCr alloy foil) and non-metal foils (e.g., ceramic/glass cast sheet). In a more preferred embodiment, the foil or sheet forming the housing element 35c is a foil or sheet using a metal or alloy having a high thermal conductivity; such as a foil or sheet of gold, silver, copper, aluminum, or alloys thereof.

According to what is shown in fig. 4, the foil or sheet wound to form the housing element 35c is in the shape of a continuous rectangle or strip or the like.

In some implementations, the sheet material wound to form the housing element 35c is a single layer of foil of a metal or alloy. In still further preferred implementations, the sheet wound to form the housing element 35c is a sheet of a composite layer of at least two layers; in one specific implementation, the sheet material wound to form the housing member 35c includes:

a metal or alloy layer; and the number of the first and second groups,

a stress compensation layer bonded to the metal or alloy layer; the stress compensation layer provides stress compensation for bending or twisting during coiling to prevent cracking or fracture of the more brittle metal or alloy layer during coiling.

In some preferred implementations, the stress compensation layer is a flexible layer; the specific stress compensation layer is a flexible polymer material; such as polyimide, free polypropylene, polyethylene, and the like.

The metal or alloy layer has a thickness of about 0.5 to 30 μm. The stress compensation layer has the same thickness as the metal or alloy layer and is formed on at least one side surface of the metal or alloy layer by coating or deposition.

Further in accordance with a preferred embodiment as shown in FIG. 3, the tubular housing element 35c wound from foil or sheet has a wall thickness of about 0.1 to 0.5 mm. And, the case element 35c has about 2 to 10 windings between the innermost end 351c and the outermost end 352 c.

In a specific calculation, such as in fig. 3, the winding of the foil or sheet is from the inside out; starting from the innermost end 351c, when the foil or sheet is wound 360 degrees per winding angle for 1 winding. For example, in fig. 3, the outermost end 352c and the innermost end 351c are at substantially the same radial position, and in the specific implementation of fig. 3 the housing element 35c has 6 windings, with 6 wound layers 353c being formed between the outermost end 352c and the innermost end 351 c.

Further the end 351c of the housing element 35c at the innermost side is secured against or snug by the resistance heating element 31 c; and to prevent unraveling of the outermost end 352c, the outer surface of the housing element 31 forming a closure or seal is formed by an inorganic glue, frit or solder connection after winding at the outermost end 352c to prevent aerosol or condensate or residue of the aerosol-generating article a from entering between the wound layers. Or in still other implementations, when the housing element 35c is made by winding a non-metallic foil (e.g., a ceramic/glass cast sheet), a closure or seal is formed at the outermost end 352c by inter-layer welding or sintering to solidify after winding.

In the above preparation of the heater 30, after the case element 35c is formed by winding the resistance heating element 31c, the gas inside the case element 35c may be further removed by heating and pressing, and the above inorganic paste, glaze or solder connecting material may be cured to enhance the strength of the case element 35c as the outer case of the heater 30.

In still other implementations, the housing element 35c is electrically insulated from the resistance heating element 31c by an insulating layer or filler, or the sheet of the housing element 35c itself comprises an insulating material to provide insulation; such as the above stress compensation layer materials, or ceramic or glass materials.

In the preferred implementation shown in fig. 2, the heater 30 further comprises:

a flange or holder 36c surrounding and bonded to the electrode ring 33 c; the flange or the fixing seat 36c is usually made of ceramics or heat-resistant organic matters such as PEEK and Teflon; in assembly, the aerosol-generating device is clamped or held against the flange or holder 36c to thereby provide a stable assembly of the heater 30 within the aerosol-generating device.

Or further figure 6 shows a schematic view of a heater 30 of yet another alternative embodiment; the heater 30 of this embodiment includes:

a base 32d having a section 321d and a section 322 d; section 321d is tapered in shape and defines a free front end 310d of heater 30; section 322d is a rod or rod-like or cylindrical shape having a substantially constant outer diameter;

resistive heating elements 31d, such as resistive heating coils, are disposed around section 322d of substrate 32 d;

the upper end of the resistance heating element 31d is directly connected to and conducted with the first wire 341d at the connection position B1 by welding, crimping, or the like; the lower end of the resistance heating element 31d is directly connected and conducted with the second wire 342d at the connection position B2 by welding, crimping or the like;

a housing element 35c surrounding the resistive heating element 31d and a section 322d of the base 32 d; housing element 35d is offset from section 321d of base 32 d. After assembly, the resistance heating element 31d is restrained and held by the housing element 35d on the section 322d of the base 32d, preventing the resistance heating element 31d from loosening or moving. At the same time, the outer surface of the heater 30 is at least partially bounded by the housing element 35d after assembly.

In practice, the case member 35d is formed by winding a foil or sheet having a thickness of 0.5 to 30 μm as described above. And, the foil or sheet is a metal foil (e.g., stainless steel foil, NiCr alloy foil) and a non-metal foil (e.g., ceramic/glass cast sheet). In a more preferred embodiment, the foil or sheet forming the housing element 35d is a foil or sheet using a metal or alloy having a high thermal conductivity; such as a foil or sheet of gold, silver, copper, aluminum, or alloys thereof.

The above housing element 35d, in which the heater 30 is wound by a foil or sheet, at least partially defines the outer shell or surface of the heater 30, which allows the heat flow to rotate over the surface of the resistive heating element 31d, which may better equalize the temperature field distribution over the surface of the heater 30.

Or even further in a more preferred implementation, the surface of the wound housing element 35c/35d of the heater 30 may further be formed with a protective coating, such as a smoother aqueous nanoceramic coating, or a smoother glass glaze layer; to prevent the adhesion or corrosion of organics or condensate originating from the aerosol-generating article a to the surface of the housing member 35c/35 d.

It should be noted that the description and drawings of the present application illustrate preferred embodiments of the present application, but are not limited to the embodiments described in the present application, and further, those skilled in the art can make modifications or changes according to the above description, and all such modifications and changes should fall within the scope of the claims appended to the present application.

Claims (17)

1. An aerosol-generating device configured to heat an aerosol-generating article to generate an aerosol; it is characterized by comprising:

a chamber for receiving an aerosol-generating article; and

a heater extending at least partially within the chamber for insertion into an aerosol-generating article to heat the aerosol-generating article; the heater has a free front end located within the chamber and a distal end facing away from the free front end; wherein the heater comprises:

a housing element extending between the free front and rear ends and at least partially defining an outer surface of the heater; the housing member is formed by winding a sheet material comprising a metal or an alloy.

2. An aerosol-generating device according to claim 1, wherein the sheet is continuous.

3. An aerosol-generating device according to claim 1 or 2, wherein the housing element comprises 2 to 10 wound layers.

4. An aerosol-generating device according to claim 1 or 2, wherein the housing element is configured to be tubular in shape wound from a sheet comprising a metal or alloy.

5. An aerosol-generating device according to claim 4, wherein the housing element has a thickness of 0.1 to 0.5 mm.

6. An aerosol-generating device according to claim 4, wherein the outer surface of the housing member is closed or sealed.

7. An aerosol-generating device according to claim 1 or 2, wherein the sheet comprises:

a metal or alloy layer;

a stress compensation layer bonded to the metal or alloy layer for providing stress compensation in the winding of the sheet material to prevent cracking or breaking of the metal or alloy layer.

8. An aerosol-generating device according to claim 7, wherein the stress compensating layer is flexible.

9. The aerosol-generating device of claim 7, wherein the metal or alloy layer has a thickness of 0.5 to 30 μm.

10. An aerosol-generating device according to claim 1 or 2, wherein the heater further comprises:

a base body at least partially housed within the housing element and extending along a length of the heater;

a resistive heating element housed within the housing element and surrounding at least a portion of the substrate.

11. The aerosol-generating device of claim 10, wherein the substrate comprises a first section and a second section arranged in series; wherein the content of the first and second substances,

the first section is proximate to and defines the free front end;

the shell member at least partially surrounds the second segment and exposes the first segment.

12. The aerosol-generating device of claim 11, wherein the resistive heating element is bonded to an exterior side of the second segment and surrounds at least a portion of the second segment.

13. The aerosol-generating device of claim 10, wherein the housing element is configured to abut the resistive heating element and retain the resistive heating element outside of the substrate.

14. The aerosol-generating device of claim 10, wherein the housing element is configured to in turn heat the aerosol-generating article by receiving heat from the resistive heating element.

15. An aerosol-generating device configured to heat an aerosol-generating article to generate an aerosol; it is characterized by comprising:

a chamber for receiving an aerosol-generating article; and

a heater extending at least partially within the chamber for insertion into an aerosol-generating article to heat the aerosol-generating article; the heater having a free front end for insertion into an aerosol-generating article and a terminal end facing away from the free front end; wherein the heater comprises:

a base extending between the free leading end and the trailing end; the base includes a first section proximate the free leading end, and a second section proximate the terminal end;

a resistive heating coil surrounding at least a portion of the second section;

a housing element surrounding at least a portion of the resistive heating coil and exposing the first section; the shell element comprises at least two wound layers formed from a continuous winding of sheet material.

16. The aerosol-generating device of claim 15, wherein a cross-section of the wire material of the resistive heating coil has a first dimension extending in an axial direction and a second dimension extending in a radial direction; the first size is greater than the second size.

17. A heater for an aerosol-generating device, wherein the heater is configured as a pin or needle or sheet and has a free leading end and a trailing end facing away from each other along its length; wherein the heater comprises:

a housing element extending between the free front and rear ends and at least partially defining an outer surface of the heater; the housing member is formed by winding a sheet material comprising a metal or an alloy.

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