CN-113576048-B - Susceptor for aerosol generating device and aerosol generating device

Abstract

The invention provides an aerosol generating device and a susceptor for the aerosol generating device, wherein the susceptor comprises an electrically insulating substrate extending at least partially into a chamber, a receptive material layer formed on the electrically insulating substrate, and an electrically conductive track thermally conductive to the receptive material layer, wherein the receptive material layer is penetrable by a changing magnetic field to generate heat and thereby heat a smokable material, and wherein the electrically conductive track has a positive or negative temperature coefficient of resistance, and wherein the temperature of the receptive material layer is determined by measuring the resistance value of the electrically conductive track and from the resistance value. The aerosol generating device and the susceptor take the electric insulating substrate as a carrier, a sensing material layer capable of inducing heating through a magnetic field and a conductive track with a proper resistance temperature coefficient are formed on the electric insulating substrate, the temperature of the susceptor can be accurately detected when the smokeable material is heated in response to the magnetic field, and compared with a temperature measuring mode of a temperature sensor, the production and the preparation are more convenient, and the temperature measuring effect is more accurate.

Inventors

• QI ZUQIANG
• WU TAO
• SHI LEI
• LUO JIAMAO
• Lei baoling
• XU ZHONGLI
• LI YONGHAI

Assignees

• 深圳市合元科技有限公司

Dates

Publication Date

20260505

Application Date

20200430

Claims (15)

1. 1. An aerosol-generating device configured to heat smokable material to generate an aerosol, comprising: A chamber for receiving at least a portion of the smokable material; a magnetic field generator configured to generate a varying magnetic field; A susceptor comprising an electrically insulating substrate extending at least partially into the chamber, and a layer of susceptor material formed on the electrically insulating substrate, an electrically conductive trace thermally conductive to the layer of susceptor material, wherein the layer of susceptor material is configured to be penetrable by the varying magnetic field to generate heat thereby heating at least a portion of the smokable material received within the chamber, the electrically conductive trace is formed between the electrically insulating substrate and the layer of susceptor material, the electrically conductive trace having a positive or negative temperature coefficient of resistance such that the temperature of the layer of susceptor material can be determined by measuring the resistance value of the electrically conductive trace and from the resistance value, the layer of susceptor material is configured to extend along the length of the electrically insulating substrate and around the tubular shape of the electrically insulating substrate, the electrically conductive trace is configured to be located within the region of magnetic field shielding formed within the layer of susceptor material; the susceptor further comprises a base portion through which the aerosol-generating device provides retention to the susceptor, the layer of susceptor material being non-contact with the base portion and having a spacing therebetween and forming a retaining area from the spacing; A support for holding the susceptor, the support being connected to the holding area and at least partially surrounding the base portion to provide a hold for the susceptor, and the support being non-contacting with the layer of susceptor material.
2. 2. The aerosol-generating device of claim 1, wherein the layer of susceptor material is a layer of susceptor material formed by deposition, spraying, winding or encapsulation on the electrically insulating substrate.
3. 3. The aerosol-generating device of claim 1, wherein the layer of susceptor material has a thickness of less than 0.2 mm.
4. 4. An aerosol-generating device according to any of claims 1 to 3, wherein the layer of susceptor material comprises a metal.
5. 5. An aerosol-generating device according to any of claims 1 to 3, wherein the electrically conductive track is configured as a spiral extending along the length of the electrically insulating substrate.
6. 6. An aerosol-generating device according to any of claims 1 to 3, wherein the layer of receptive material is mutually insulated from the conductive tracks.
7. 7. An aerosol-generating device according to any of claims 1 to 3, wherein the susceptor has an outer protective layer.
8. 8. An aerosol-generating device according to any one of claims 1 to 3, wherein the susceptor further comprises electrical connections provided at both ends of the conductive track through which, in use, the resistance value of the conductive track may be measured.
9. 9. The aerosol-generating device of claim 8, wherein the electrical connection comprises an elongate conductive pin.
10. 10. The aerosol-generating device of claim 8, wherein the conductive trace comprises a first portion and a second portion, and the first portion has a higher temperature coefficient of resistance than the second portion; the electrical connection is connected to the conductive trace through the second portion.
11. 11. An aerosol-generating device according to any of claims 1 to 3, wherein the magnetic field generator comprises an inductor coil extending in an axial direction of the chamber and surrounding the chamber; The extending length of the inductance coil along the axial direction of the cavity covers the extending length of the sensing material layer along the axial direction of the cavity.
12. 12. An aerosol-generating device according to any of claims 1 to 3, wherein the electrically insulating substrate comprises a ceramic.
13. 13. The aerosol-generating device of claim 1, wherein the layer of susceptor material is a hollow pin or tube sleeved outside the electrically insulating substrate.
14. 14. An aerosol-generating device according to any of claims 1 to 3, wherein the layer of receptive material completely covers the conductive tracks.
15. 15. A susceptor for an aerosol-generating device, comprising: An electrically insulating substrate, a receptive material layer formed on the electrically insulating substrate, and electrically conductive traces thermally conductive to the receptive material layer, The sensing material layer is configured to be penetrable by a varying magnetic field to generate heat, the conductive trace is formed between the electrically insulating substrate and the sensing material layer, the conductive trace has a positive or negative temperature coefficient of resistance so that the temperature of the sensing material layer can be determined by measuring the resistance value of the conductive trace and from the resistance value, the sensing material layer is configured to extend along the length direction of the electrically insulating substrate and to surround the tubular shape of the electrically insulating substrate, and the conductive trace is configured to be positioned in the region of the magnetic field shield formed in the sensing material layer; The susceptor further includes a base portion, the layer of susceptor material being non-contacting with the base portion and the layer of susceptor material having a spacing therebetween and forming a holding area by the spacing.

Description

Susceptor for aerosol generating device and aerosol generating device Technical Field The embodiment of the invention relates to the field of electromagnetic induction heating non-combustion smoking articles, in particular to a susceptor for an aerosol generating device and 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. In known devices, temperature monitoring during heating of the tobacco product is required, examples of such products being attached to the heating element by a temperature sensor, whereby the temperature of the heating element is obtained. Disclosure of Invention In order to solve the problem of temperature monitoring of a smoking article heating device in the prior art, the embodiment of the invention provides an electromagnetic induction type aerosol generating device which is convenient to produce and manufacture and accurately detects temperature. The present invention proposes an aerosol-generating device configured to heat smokable material to generate an aerosol, comprising: A chamber for receiving at least a portion of the smokable material; a magnetic field generator configured to generate a varying magnetic field; The susceptor comprises an electrically insulating substrate extending at least partially into the chamber, and a layer of susceptor material formed on the electrically insulating substrate, an electrically conductive trace thermally conductive to the layer of susceptor material, wherein the layer of susceptor material is configured to be penetrable by the varying magnetic field to generate heat and thereby heat at least a portion of the smokable material received in the chamber, and the electrically conductive trace has a positive or negative temperature coefficient of resistance such that the temperature of the layer of susceptor material can be determined by measuring the resistance value of the electrically conductive trace and from the resistance value. In a preferred implementation, the receptive material layer is a receptive material layer formed by deposition, spraying, winding or wrapping on the electrically insulating substrate. In a preferred implementation, the layer of receptive material has a thickness of less than 0.2 mm. In a preferred implementation, the receptive material layer comprises a metal or alloy. In a preferred implementation, the conductive trace is configured to be located outside the receptive material layer. In a preferred implementation, the electrically conductive tracks are formed between the electrically insulating substrate and the layer of receptive material. In a preferred implementation, the layer of susceptor material is configured as a tube extending along the length of the electrically insulating substrate and surrounding the electrically insulating substrate. In a preferred implementation, the conductive trace is configured to be located within a region formed within the receptive material layer that is substantially magnetic field shielding. In a preferred implementation, the conductive trace is configured as a spiral extending along the length of the electrically insulating substrate. In a preferred implementation, the layer of receptive material is insulated from the conductive traces. In a preferred implementation, the susceptor may have an outer protective layer, such as a ceramic protective layer or a glass protective layer encapsulating the susceptor. The susceptor may include a protective coating formed of glass, ceramic, or an inert metal formed on a core of susceptor material. In a preferred implementation, the susceptor further comprises electrical connections disposed at both ends of the conductive track through which, in use, the resistance value of the conductive track may be measured. In a preferred implementation, the electrical connection comprises an elongated conductive pin. In a preferred implementation, the conductive trace includes a first portion and a second portion, and the first portion has a higher temperature coefficient of resistance than the second portion; the electrical connection is connected to the conductive trace through the second portion. In a preferred implementation, the magnetic field generator comprises an inductor extending in an axial direction of the chamber and surrounding the chamber; The extending length of the inductance coil along the axial direction of the cavity covers the extending length of the sensing material layer along the axial direction of the cavity. In a preferred implementation, the electrically insulating substrate comprises