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CN-121986975-A - Method for producing heating element, heating element and aerosol-generating device

CN121986975ACN 121986975 ACN121986975 ACN 121986975ACN-121986975-A

Abstract

The application provides a preparation method of a heating component, the heating component and an aerosol-generating device, wherein the preparation method of the heating component comprises the steps of providing a supporting tube; and a heating coating is coated on the outer surface of the support tube, and the heating coating covers the heat-resistant area. According to the application, the heat transfer can be slowed down by arranging the heat-resistant area, so that the heat is concentrated in the preset area; meanwhile, as the heat-resistant area is arranged on the supporting tube, a heat-resistant structure does not need to be processed at the heating coating, and the heating coating can be of a complete coating structure, so that microcracks formed at the heating coating due to machining can be avoided. In addition, the complete coating structure has a complete layered structure, and the compressive property is stronger.

Inventors

  • QI ZUQIANG
  • SHI JIMING
  • ZHOU LU
  • ZHOU HEPING
  • LI JUNWEI
  • Lian Delai

Assignees

  • 深圳市合元科技有限公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (20)

  1. 1. A method of making a heating assembly comprising: Providing a supporting tube; Cutting on the support tube to form a heat-resistant area, wherein the heat-resistant area separates the support tube into at least one heat-conducting area; and coating a heating coating on the outer surface of the supporting tube, wherein the heating coating covers the heat-resistant area and at least one heat-conducting area.
  2. 2. The method of claim 1, wherein the step of cutting the support tube to form the heat-resistant region comprises forming the heat-resistant region on the support tube by machining or laser cutting.
  3. 3. The method of claim 1, wherein the heat-blocking area comprises a connecting portion and a recessed portion, the recessed portion is a through hole or a groove, and the connecting portion and the recessed portion are disposed adjacently.
  4. 4. A method of manufacturing a heating assembly as claimed in claim 3, wherein the recess extends in an arc or spiral shape in the circumferential direction of the support tube.
  5. 5. The method of manufacturing a heating assembly according to claim 3, wherein the length of the connecting portion in the circumferential direction of the support tube is 0.3mm to 2mm, and/or the length of the recessed portion in the circumferential direction of the support tube is 0.05mm to 0.5mm.
  6. 6. A method of manufacturing a heating assembly according to claim 3, wherein the total length of all the connecting portions in the circumferential direction of the support tube is 50% or less of the circumferential length of the support tube.
  7. 7. A method of manufacturing a heating assembly according to claim 3, wherein the number of the connection portions is 3 or more.
  8. 8. The method of claim 1, wherein the step of providing a heat blocking area on the support tube comprises providing a heat insulating material on the heat blocking area.
  9. 9. The method of manufacturing a heating assembly according to claim 1, wherein the thermal insulation material has a thermal conductivity of 1.4W/(m-K) -4W/(m-K).
  10. 10. The method of claim 1, wherein the step of applying a heat-generating coating to the outer surface of the support tube comprises applying a first insulating layer to the outer surface of the support tube.
  11. 11. The method of claim 10, further comprising applying a heat generating layer to the first insulating layer during the step of applying a heat generating coating to the outer surface of the support tube.
  12. 12. The method of claim 11, wherein the heat-generating layer comprises a plurality of sub-heat-generating layers, and a spacer is disposed between two adjacent sub-heat-generating layers, and the spacer and the heat-blocking region are disposed opposite to each other.
  13. 13. The method of manufacturing a heating assembly of claim 12, wherein the resistance of the sub-heat generating layer is 0.35 Ω -1.0 Ω, and/or the resistance of the sub-heat generating layer is 0.45 Ω -0.8 Ω.
  14. 14. The method of claim 10, wherein the step of applying a heat-generating coating to the outer surface of the support tube further comprises applying a second insulating layer to the heat-generating layer.
  15. 15. The method of claim 14, wherein the first insulating layer or the second insulating layer has a thickness of 15 μm to 30 μm.
  16. 16. The method of manufacturing a heating assembly of claim 14, wherein the first insulating layer and the second insulating layer have a thermal conductivity of 1.4W/(m-K) -4W/(m-K).
  17. 17. The method of claim 10, wherein the step of coating the heat generating layer on the first insulating layer comprises providing a first electrode and a second electrode on the first insulating layer, the first electrode and the second electrode being electrically connected to the heat generating layer.
  18. 18. The method of manufacturing a heating assembly according to claim 1, wherein the support tube has a thickness of 0.05mm to 0.3mm and/or the support tube has a thickness of 0.1mm to 0.2mm.
  19. 19. The method of manufacturing a heating assembly according to claim 1, wherein the thermal conductivity of the support tube is 15W/(m-K) or more.
  20. 20. A heating assembly, comprising: The support tube comprises a heat-resistant area and a heat-conducting area, wherein the heat-resistant area is used for blocking heat conduction of adjacent heat-conducting areas; And the heating coating is arranged on the outer surface of the supporting tube and covers the heat-resistant area and at least one heat-conducting area.

Description

Method for producing heating element, heating element and aerosol-generating device Technical Field The present application relates to the field of aerosol-generating technology, and in particular to a heating element for an aerosol-generating device and a method of manufacturing the heating element. Background An aerosol-generating device is a device that generates an aerosol of an aerosol-generating article when heated but not combusted. The aerosol-generating device comprises a heating assembly that heats the aerosol-generating article. In the prior art, the heating component comprises a supporting tube and a heating coating arranged on the supporting tube, the heating layer of the heating coating comprises a plurality of sub heating layers, and different sections of the aerosol generating product can be heated by controlling different sub heating layers to work. The heating of the corresponding sub-heating layers can be selectively controlled in sequence according to the control requirements or the requirements of the aerosol generation amount. For example, in an initial stage of activation of the aerosol-generating device, in order to enable shortening of the time of aerosol-generation, heating may be performed for a particular section of the aerosol-generating article, which may have a heating power that is greater than the heating power of the other stages. In order to increase the concentration of heat in the corresponding section of the aerosol-generating article, certain measures need to be taken to limit the heat to the corresponding section. In the related art, a heat blocking area is provided on the outer circumferential wall of the heating assembly so that heat can be concentrated in the corresponding area section to intensively heat the aerosol substrate corresponding to the location. But during the process of providing the heat-resistant zone, microcracks in the heat-generating coating may result. Due to the existence of the microcracks, the microcracks are in the risk of expanding in the repeated use and heating processes of the aerosol generating device, and then the heating assembly is disabled, so that the service life of the heating assembly is shortened, and the service life of the whole aerosol generating device is influenced. Content of the application In order to solve the problem that the heating coating cracks, thereby affecting the heating effect of the heating component on the aerosol-generating product and affecting the sucking taste of a user. The application provides a preparation method of a heating component, which comprises the following steps: Providing a supporting tube; Cutting on the support tube to form a heat-resistant area, wherein the heat-resistant area separates the support tube into at least one heat-conducting area; and coating a heating coating on the outer surface of the supporting tube, wherein the heating coating covers the heat-resistant area and at least one heat-conducting area. The application provides a preparation method of a heating component, wherein the step of cutting on a supporting tube to form a heat-resistant area comprises the step of manufacturing the heat-resistant area on the supporting tube through machining or laser cutting. The application provides a preparation method of a heating component, wherein the heating component comprises a connecting part and a concave part, the concave part is a through hole or a groove, and the connecting part and the concave part are adjacently arranged. The application provides a preparation method of a heating assembly, wherein the concave part extends along an arc shape or a spiral line shape in the circumferential direction of the supporting tube. The application provides a preparation method of a heating assembly, wherein the length of a connecting part in the circumferential direction of a supporting tube is 0.3-2 mm, and/or the length of a concave part in the circumferential direction of the supporting tube is 0.05-0.5 mm. The application provides a preparation method of a heating assembly, wherein the total length of all connecting parts in the circumferential direction of a supporting tube accounts for 50% or less of the circumference of the supporting tube. The application provides a preparation method of a heating assembly, wherein the number of connecting parts is more than or equal to 3. The application provides a preparation method of a heating component, which comprises the step of arranging a heat-insulating material on a heat-insulating area in the step of arranging the heat-insulating area on a supporting pipe. The application provides a preparation method of a heating component, wherein the thermal conductivity of the heat insulation material is 1.4W/(m.K) -4W/(m.K). The application provides a preparation method of a heating assembly, which specifically comprises the step of coating a first insulating layer on the outer surface of a supporting tube in the step of coating a heating coatin