CN116268621A - Gas mist generating device and heater for gas mist generating device - Google Patents

Abstract

The application discloses an aerosol-generating device and a heater for the aerosol-generating device; wherein the aerosol-generating device comprises: a chamber for receiving an aerosol-generating article; a magnetic field generator for generating a varying magnetic field; a heater for heating the aerosol-generating article; the heater includes: a susceptor extending at least partially within the chamber and configured to be penetrated by a varying magnetic field to generate heat; the groove is formed on the outer surface of the susceptor; a temperature sensor is at least partially received and retained within the recess and is configured to sense a temperature of the sensing body. The above aerosol generating device senses the temperature of the susceptor by providing a groove on the surface of the susceptor and accommodating and holding the temperature sensor in the groove.

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 aerosol generation, 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 the compounds without burning.

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 that may or may not contain nicotine. As another example, the prior art proposes a heating device of the electromagnetic induction heating type, which heats tobacco or non-tobacco products by means of susceptors that are penetrable by a varying magnetic field to generate heat, thereby generating inhalable aerosols. A known heating device senses the temperature of a susceptor in real time by packaging a temperature sensor after punching holes in the susceptor; perforating and packaging temperature sensors within the susceptor is difficult to produce and process.

Disclosure of Invention

One embodiment of the present application provides an aerosol-generating device for heating an aerosol-generating article to generate an aerosol; comprising the following steps:

a chamber for receiving an aerosol-generating article;

a magnetic field generator for generating a varying magnetic field;

a heater for heating the aerosol-generating article; the heater includes:

a susceptor extending at least partially within the chamber and configured to be penetrated by a varying magnetic field to generate heat;

the groove is formed on the outer surface of the susceptor;

a temperature sensor is at least partially received and retained within the recess and is configured to sense a temperature of the susceptor.

In a preferred implementation, the susceptor has a free front end located within the chamber, and a distal end opposite the free front end in a length direction;

the recess is configured to extend along a length of the susceptor and terminate at the end.

In a preferred implementation, the temperature sensor comprises:

the first thermocouple wire and the second thermocouple wire are connected with the susceptor; the first thermocouple wire and the second thermocouple wire are made of different materials.

In a preferred implementation, the grooves include first and second grooves spaced apart along the circumference of the susceptor;

the first thermocouple wire is at least partially accommodated in the first groove; the second galvanic wire is at least partially received in the second groove.

In a preferred implementation, the temperature sensor comprises:

a temperature sensing probe or sensing part accommodated in the groove for sensing the temperature of the susceptor;

and an electrical pin connected to the temperature sensing probe or sensing portion extends at least partially outside the susceptor.

In a preferred implementation, the temperature sensor is at least partially located within the chamber.

In a preferred implementation, the method further comprises:

and the protective layer is combined with the outer surface of the susceptor and covers the groove so as to limit at least part of the temperature sensor in the groove.

In a preferred implementation, the protective layer is opaque; the temperature sensor is not visible through the protective layer.

In a preferred implementation, the protective layer has a thickness of 0.1 to 0.5 mm.

In a preferred implementation, the protective layer comprises glass enamel.

In a preferred implementation, the protective layer is smoother than the outer surface of the susceptor to reduce adhesion or deposition of organics or aerosol condensate from the aerosol-generating article on the heater surface.

In a preferred implementation, the susceptor includes a non-susceptor substrate and a susceptor coating formed on a surface of the substrate.

In a preferred embodiment, the susceptor comprises a base extending radially outwardly at the end; the aerosol-generating device provides retention of the heater by the base.

In a preferred implementation, the temperature sensor spans the base along the length of the heater.

In a preferred embodiment, the recess has an extension of 8 to 12mm.

Yet another embodiment of the present application also proposes a heater for an aerosol-generating device, comprising:

a susceptor configured to be penetrated by a varying magnetic field to generate heat, and configured as a pin or a needle or a column or a rod or a sheet;

the groove is formed on the outer surface of the susceptor;

a temperature sensor is at least partially received and retained within the recess and is configured to sense a temperature of the susceptor.

The above aerosol generating device senses the temperature of the susceptor by providing a groove on the surface of the susceptor and accommodating and holding the temperature sensor in the groove.

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 of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a schematic diagram of an aerosol-generating device provided in an embodiment of the present application;

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

FIG. 3 is an exploded view of the heater of FIG. 2 from one perspective;

FIG. 4 is a schematic cross-sectional view of the heater of FIG. 2 from one perspective;

fig. 5 is an exploded view of yet another embodiment of the heater of fig. 1.

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.

An embodiment of the present application proposes an aerosol-generating device, the configuration of which may be seen in fig. 1, comprising:

a chamber within which the aerosol-generating article a is removably received;

a magnetic field generator, such as an induction coil 50, for generating a varying magnetic field under an alternating current;

a heater 30, at least a portion of which extends within the chamber and is configured to inductively couple with the induction coil 50 to generate heat upon penetration by the varying magnetic field, thereby heating the aerosol-generating article a, such as a cigarette, to volatilize at least one component of the aerosol-generating article a to form an aerosol for inhalation;

the battery cell 10 is a chargeable battery cell and can output direct current;

the circuit 20 is electrically connected to the rechargeable battery cell 10 by means of suitable electrical connections for converting the direct current output by the battery cell 10 into an alternating current of a suitable frequency for supply to the induction coil 50.

Depending on the arrangement in use of the product, the induction coil 50 may comprise a cylindrical inductor coil wound in a spiral, as shown in fig. 1. The helically wound cylindrical induction coil 50 may have a radius r in the range of about 5mm to about 10mm, and in particular the radius r may be about7mm. The length of the helically wound cylindrical induction coil 50 may be in the range of about 8mm to about 14mm, with the number of turns of the induction coil 50 being in the range of about 8 turns to 15 turns. Accordingly, the internal volume may be about 0.15cm ³ To about 1.10cm ³ Within a range of (2).

In a more preferred implementation, the frequency of the alternating current supplied by circuit 20 to induction coil 50 is between 80KHz and 500KHz; more specifically, the frequency may be in the range of about 200KHz to 300 KHz.

In a preferred embodiment, the DC supply voltage provided by the battery cell 10 is in the range of about 2.5V to about 9.0V, and the amperage of the DC current that the battery cell 10 can provide is in the range of about 2.5A to about 20A.

In a preferred embodiment, the heater 30 is generally in the shape of a pin or needle or rod or blade, and is further advantageous for insertion into the aerosol-generating article a; meanwhile, the heater 30 may have a length of about 12mm, a width of about 4mm, and a thickness of about 0.5mm, and may be made of grade 430 stainless steel (SS 430). As an alternative embodiment, the heater 30 may have a length of about 12 millimeters, a width of about 5 millimeters, and a thickness of about 0.5 millimeters, and may be made of grade 430 stainless steel (SS 430). In other variations, heater 30 may also be configured in a cylindrical or tubular shape; the interior space thereof forms a chamber for receiving the aerosol-generating article a in use and generates aerosol for inhalation by heating the outer periphery of the aerosol-generating article a. These heaters 30 may also be made of grade 420 stainless steel (SS 420), and an alloy material containing iron/nickel (such as permalloy).

In the embodiment shown in fig. 1, the aerosol-generating device further comprises a support 40 for the induction coil 50 and the heater 30, and the support 40 may be made of a high temperature resistant non-metallic material such as PEEK or ceramic, etc. In practice, the induction coil 50 is wrapped around the outer wall of the support 40 and secured thereto. Meanwhile, according to fig. 1, the hollow tubular shape of the holder 40, the tubular hollow partial space of which forms the above-mentioned chamber for receiving the aerosol-generating article a.

In an alternative implementation, the heater 30 is made of the above receptive materials; alternatively, the heater 30 may be obtained by forming a coating of the susceptor material by plating, depositing, or the like on the outer surface of a heat-resistant substrate material such as a non-susceptor ceramic.

Further figures 2-4 show schematic views of an embodiment of a heater 30 having a longitudinally opposed free front end 310 and a rear end 320; the free front end 310 is exposed within the chamber after assembly and the end is hidden from view by the housing or fixed components attached to the aerosol-generating device. The further heater 30 includes:

a susceptor 31 in the form of a pin or needle or rod; the susceptor 31 is made of the above sensitive material and is capable of being penetrated by a varying magnetic field to generate heat; and the free front end 310 and the end 320 of the heater 30 are respectively defined by two ends of the susceptor 31 in the length direction;

the susceptor 31 has a tapered portion 311 near the free front end 310, thereby forming a tapered tip at the free front end 310, which is advantageous for insertion into the aerosol-generating article a; susceptor 31 has a base 312 extending radially outwardly at end 320; the base 312 is convex with respect to the rest of the susceptor 31 so that the aerosol-generating device can provide support for the heater 30 by clamping or holding the base 312 during assembly to provide a stable assembly of the heater 30.

In some alternative implementations, susceptor 31 is made from the above receptive metals or alloys; such as magnetic stainless steel, nickel-iron alloy, iron-aluminum alloy, etc. In some alternative implementations, the susceptor 31 is prepared by machining, powder metallurgy, in-mold injection molding, and the like.

In some alternative implementations, the above susceptor 31 has an outer diameter of about 2.0-3.0 mm and an extension d1 of about 12-20 mm.

Further, the susceptor 31 is provided with:

the first recess 313 and the second recess 314 extend along the length of susceptor 31 and terminate at a distal end 320. The first grooves 313 and the second grooves 314 are arranged at intervals along the circumferential direction of the susceptor 31. In a preferred embodiment, the first recess 313 and the second recess 314 have an extension d2 of about 8-12 mm. And, the first groove 313 and the second groove 314 have a depth and/or width of about 0.2 to 0.8 mm.

A temperature sensor comprising a first wire 341 and a second wire 342, positioned within the first recess 313 and the second recess 314, respectively; and is kept connected to susceptor 31 by welding or the like. And the first and second wires 341 and 342 are respectively prepared using different materials of the couple, so that a thermocouple for detecting the temperature of the heater 30 can be formed therebetween. For example, the first thermocouple wire 341 and the second thermocouple wire 342 are made of two different materials of nickel, nickel-chromium alloy, nickel-silicon alloy, nickel-chromium-copper alloy, bronze alloy, iron-chromium alloy and other thermocouple materials.

The first and second wires 341 and 342 have an outer diameter size of about 0.2 to 0.8mm, and thus, when the first and second wires 341 and 342 are received in the first and second grooves 313 and 314, respectively, the first and second grooves 313 and 314 are substantially exactly filled. Or in a more preferred embodiment, the depth or width of the first recess 313 and the second recess 314 is slightly greater than the outer diameter of the first wire 341 and the second wire 342 by about 0.1mm, it is easier to embed the first wire 341 and the second wire 342 in the first recess 313 and the second recess 314, and the first wire 341 and the second wire 342 are then substantially flush with the surface of the susceptor 31. Further, after assembly, the first and second galvanic wires 341, 342 are not substantially significantly raised or recessed relative to the surface of the susceptor 31.

In some implementations, the cross-sections of the first grooves 313 and the second grooves 314 can be generally diamond, circular, square, etc. in shape.

Referring further to fig. 3 and 4, the susceptor 312 of the susceptor 31 is provided with a first hole 315 opposite to the first recess 313 and a second hole 316 opposite to the second recess 314; the first galvanic wire 341 extends through the first hole 315 and out of the end 320, and the second galvanic wire 342 extends through the second hole 316 and out of the end 320, which is advantageous for connection to the circuit 20. The circuit 20 may obtain the temperature of the heater 30 by sampling the thermoelectric potential between the first and second wires 341, 342.

Further, the surfaces of the first and second wires 341 and 342 are formed with an insulating coating so that they are kept insulated from the susceptor 31. In some implementations, the insulating coating may be prepared on the first and second wires 341 and 342 by a spray coating, dip coating, vacuum coating, high temperature oxidation, or the like process.

Further referring to fig. 2 to 4, the heater 30 further includes:

a protective layer 32 formed or coated on the outer surface of the susceptor 31. The confinement of the first and second filaments 341, 342 within the first and second recesses 313, 314 by the protective layer 32 is advantageous in preventing them from escaping from the first and second recesses 313, 314 and protruding outside the susceptor 31.

In some implementations, the protective layer 32 may include an inorganic non-metallic material, such as an oxide (e.g., mgO, siO ₂ 、Al ₂ O ₃ 、B ₂ O ₃ Etc.), nitride (Si ₃ N ₄ 、B ₃ N ₄ 、Al ₃ N ₄ Etc.), or other highly thermally conductive composite ceramic materials. In practice, the protective layer 32 may be formed on the surface of the susceptor 31 by spraying or deposition or the like. And the material of the protective layer 32 is filled in the gaps between the first and second wires 341 and 342 and the first and second grooves 313 and 314 during the spraying or depositing process. In one particular implementation, the protective layer 32 is a ceramic film or glass frit.

Further, the protective layer 32 is formed by spraying or depositing, etc., and the surface of the heater 30 is smooth and flat. The protective layer 32 covers at least the first recess 313 and the second recess 314.

Further in a more preferred implementation, the protective layer 32 is made of a non-transparent material, and the first and second galvanic filaments 341, 342, which are covered or covered by the protective layer 32, are not visible from passing through the protective layer 32.

In some implementations, the protective layer 32 may have a thickness of about 0.1-0.5 mm.

Further fig. 5 shows a schematic view of a heater 30a of yet another embodiment; the heater 30a of this embodiment includes:

susceptor 31a configured as a pin or needle extending at least partially within the chamber; the surface of the susceptor 31a is formed with a groove 313a;

the temperature sensor 34a comprises a temperature sensing probe or sensing part 340a, and a first electric pin 341a and a second electric pin 342a connected with the temperature sensing probe or sensing part 340 a; in assembly, the temperature sensor 34a is received within the recess 313 a. And, the sensing portion 340a of the temperature sensor 34a abuts against the end of the recess 313a adjacent to the free front end 310a, fastening is facilitated.

And, the first electric pin 341a and the second electric pin 342a penetrate from the hole 315a of the base 312a to the outside of the tail end 320a, and then are connected with the circuit 20 to facilitate sampling the sensing result of the temperature sensing probe or the sensing portion 340 a.

In some alternative implementations, the temperature sensor 34a may be a thermistor-type temperature sensor such as PT1000 that calculates temperature by monitoring resistance changes, or a thermocouple-type temperature sensor that calculates temperature by calculating thermoelectric voltages across.

Likewise, after the temperature sensor 34a is received and fitted in the recess 313a, the protective layer 32a is further formed by spraying or deposition or the like, thereby stably restraining the temperature sensor 34a in the recess 313 a.

Further in the preferred embodiment shown in fig. 5, the protective layer 32a is formed to have an extension length substantially equivalent to that of the recess 313a or slightly greater than 1mm of the extension length of the recess 313a; further, in practice, the protective layer 32a does not entirely cover the surface of the susceptor 31a, but only covers the extended length section of the recess 313 a. Or in further variant implementations, the protective layer 32a covers only the area of the surface recess 313a of the susceptor 31 a.

The protective layer 32a is made of a non-transparent material, and the temperature sensor 34a covered or covered by the protective layer 32a is not visible through the protective layer 32 a.

Or in a more preferred implementation, the surface of protective layer 32a is smoother than the surface of susceptor 31 a; and is further advantageous in use to prevent organic residues or aerosol-condensate originating from the aerosol-generating article a from adhering or depositing on the surface of the heater 30 a.

In some alternative implementations, grooves 313a formed in the surface of susceptor 31a are machined by a milling cutter, or by laser ablation.

Further as shown in fig. 5, the distance d3 between the upper end of the recess 313a near the free front end 310a and the free front end 310a is about 4 to 10mm. After assembly, the distance between the temperature sensing probe or sensing portion 340a, which abuts against the upper end portion of the recess 313a, and the free front end 310a is also about 4-10 mm; the distance between the temperature sensing probe or sensing portion 340a and the free front end 310a is one third to one half of the extension length of the susceptor 31a, and this region is a high temperature region where the temperature of the susceptor 31a is concentrated during use, which is advantageous for improving the accuracy of the temperature sensing result.

Or in a more specific implementation, the heater 30a is disposed along the central axis of the induction coil 50; and, the temperature sensing probe or sensing portion 340a is located at the axial center position of the induction coil 50, which is the position where the magnetic field density is highest, which is advantageous for improving the accuracy of the temperature sensing result. It is also apparent that the temperature sensing probe or sensing portion 340a is located within the chamber after assembly.

Or in yet another variant implementation, susceptor 31a is configured as a sheet shape having a length of about 19mm and a width of 5mm and a thickness of 0.5 mm. The above groove 313a is formed on one side surface thereof in the thickness direction, and the temperature sensor 34a is accommodated and located in the groove 313a of the side surface thereof.

The above is advantageous in terms of production and preparation by accommodating a temperature sensor after grooving the surface of the susceptor 31/31a and covering and sealing by forming the protective layer 32/32a by spraying or the like.

It should be noted that, the description of the present application and the accompanying drawings thereof show preferred embodiments of the present application, but are not limited to the embodiments described in the present specification; further, modifications and variations of the present invention 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 (16)

1. An aerosol-generating device for heating an aerosol-generating article to generate an aerosol; characterized by comprising the following steps:

a chamber for receiving an aerosol-generating article;

a magnetic field generator for generating a varying magnetic field;

a heater for heating the aerosol-generating article; the heater includes:

a susceptor extending at least partially within the chamber and configured to be penetrated by a varying magnetic field to generate heat;

the groove is formed on the outer surface of the susceptor;

a temperature sensor is at least partially received and retained within the recess and is configured to sense a temperature of the susceptor.

2. The aerosol-generating device of claim 1, wherein the susceptor has a free front end located within the chamber and a distal end opposite the free front end in length;

the recess is configured to extend along a length of the susceptor and terminate at the end.

3. The aerosol-generating device according to claim 1 or 2, wherein the temperature sensor comprises:

the first thermocouple wire and the second thermocouple wire are connected with the susceptor; the first thermocouple wire and the second thermocouple wire are made of different materials.

4. The aerosol-generating device of claim 3, wherein the grooves comprise first and second grooves spaced apart along a circumference of the susceptor;

the first thermocouple wire is at least partially accommodated in the first groove; the second galvanic wire is at least partially received in the second groove.

5. The aerosol-generating device according to claim 1 or 2, wherein the temperature sensor comprises:

a temperature sensing probe or sensing part accommodated in the groove for sensing the temperature of the susceptor;

and an electrical pin connected to the temperature sensing probe or sensing portion extends at least partially outside the susceptor.

6. An aerosol-generating device according to claim 1 or 2, wherein the temperature sensor is at least partially located within the chamber.

7. The aerosol-generating device according to claim 1 or 2, further comprising:

and the protective layer is combined with the outer surface of the susceptor and covers the groove so as to limit at least part of the temperature sensor in the groove.

8. The aerosol-generating device of claim 7, wherein the protective layer is opaque; the temperature sensor is not visible through the protective layer.

9. The aerosol-generating device of claim 7, wherein the protective layer has a thickness of 0.1 to 0.5 mm.

10. The aerosol-generating device of claim 7, wherein the protective layer comprises glass enamel.

11. The aerosol-generating device of claim 7, wherein the protective layer is smoother than an outer surface of the susceptor to reduce adhesion or deposition of organics or aerosol condensate from the aerosol-generating article on the heater surface.

12. An aerosol-generating device according to claim 1 or 2, wherein the susceptor comprises a non-receptive substrate and a receptive coating formed on a surface of the substrate.

13. The aerosol-generating device of claim 2, wherein the susceptor comprises a base extending radially outwardly at the tip; the aerosol-generating device provides retention of the heater by the base.

14. The aerosol-generating device of claim 13, wherein the temperature sensor spans the base along a length of the heater.

15. An aerosol-generating device according to claim 1 or 2, wherein the recess has an extension of 8 to 12mm.

16. A heater for an aerosol-generating device, comprising:

a susceptor configured to be penetrated by a varying magnetic field to generate heat, and configured as a pin or a needle or a column or a rod or a sheet;

the groove is formed on the outer surface of the susceptor;

a temperature sensor is at least partially received and retained within the recess and is configured to sense a temperature of the susceptor.

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