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JP-2026076392-A - Electrically heated smoking system with improved heating element

JP2026076392AJP 2026076392 AJP2026076392 AJP 2026076392AJP-2026076392-A

Abstract

[Problem] To provide an electrically heated smoking system for receiving an aerosol-forming substrate. [Solution] The system includes at least one heater for heating an aerosol-forming substrate to form an aerosol, and a power supply for supplying power to the at least one heater. The at least one heater includes one or more conductive tracks (103, 203, 303, 403, 503) on an electrically insulating substrate (101, 201, 301, 401, 501). In one configuration, one or more conductive tracks (103, 203, 303, 403, 503) have a resistance temperature coefficient characteristic so that one or more conductive tracks can act as a resistance heater and temperature sensor. In another configuration, the electric heating smoking system further includes a thermal insulating material (507) for insulating the at least one heater from the outside of the electric heating smoking system. [Selection Diagram] Figure 4

Inventors

  • グレム オリヴィエ
  • プロジュー ジュリアン
  • ルッシオ ダニー

Assignees

  • フィリップ・モーリス・プロダクツ・ソシエテ・アノニム

Dates

Publication Date
20260511
Application Date
20260227
Priority Date
20091029

Claims (12)

  1. An electrically heated smoking system configured to removably receive a solid aerosol-forming substrate in the form of a plug, wherein the electrically heated smoking system is At least one heater for heating an aerosol-forming substrate to form an aerosol, wherein the at least one heater includes one or more conductive tracks on an electrically insulating substrate, the electrically insulating substrate is made of polyimide and is flexible enough to be wound, and the heater is formed of the electrically insulating substrate wound in a tubular shape, A power supply for supplying power to at least one of the heaters and maintaining the heater at a desired temperature, Includes, The solid aerosol-forming substrate forms a part of an article separate from the heater. When the solid aerosol-forming substrate is received into the smoking system, the plug-like form of the solid aerosol-forming substrate is received within the tubular form of the heater. During operation, the user directly inhales smoke from the aforementioned separate item. The electric heating smoking system further includes an electronic circuit arranged to control the supply of power from the power source to the at least one heater, The electronic circuit is configured to receive a feedback signal indicating the temperature of one or more conductive tracks, so as to enable the electronic circuit to maintain one or more conductive tracks at a desired temperature. The one or more conductive tracks include a plurality of parts, each of which can be separately connected to the power supply. An electrically heated smoking system characterized by the following features.
  2. The electrically heated smoking system according to claim 1, characterized in that the one or more conductive tracks are arranged in a pattern on a continuous surface of the electrically insulating substrate, the covered portion of the surface is covered by the one or more conductive tracks, and the uncovered portion of the surface is located between the covered portions of the electrically insulating substrate.
  3. The electrically heated smoking system according to claim 1 or 2, further comprising a temperature sensor for providing the aforementioned feedback signal.
  4. The electrically heated smoking system according to claim 1 or 2, further comprising a protective layer covering one or more of the aforementioned conductive tracks.
  5. The electrically heated smoking system according to claim 4, characterized in that the one or more conductive tracks consist of a single track.
  6. The electrically heated smoking system according to claim 1 or 2, further comprising an electronic circuit arranged to control the power supply from the power source to the at least one heater such that different portions of the one or more conductive tracks are heated for different durations, at different temperatures, or at different temperatures for different durations.
  7. The electric heating smoking system according to claim 5, characterized in that the power supply is connected to the central compartment of the single track.
  8. The electric heating smoking system according to claim 1 or 2, characterized in that the system includes an aerosol-forming substrate containing a tobacco-containing material that contains volatile tobacco flavor compounds released from the aerosol-forming substrate during heating.
  9. A method for manufacturing an electrically heated smoking system configured to removably receive a solid aerosol-forming substrate in the form of a plug, wherein the manufacturing method is: A step of forming one or more conductive tracks on a polyimide substrate that is flexible enough to be wound, The process of winding the polyimide substrate into a tubular shape together with one or more of the aforementioned conductive tracks, The steps include connecting a power supply to one or more of the aforementioned conductive tracks, The step of providing an electronic circuit configured to control the supply of power from the power source to the one or more conductive tracks in order to maintain the one or more conductive tracks at a desired temperature, Includes, The solid aerosol-forming substrate forms a portion of an article separate from the polyimide substrate. When the solid aerosol-forming substrate is received into the smoking system, the plug of the solid aerosol-forming substrate is received within the tubular form of the polyimide substrate. During operation, the user directly inhales smoke from the aforementioned separate item. The electronic circuit is further configured to receive a feedback signal indicating the temperature of one or more conductive tracks, and to control the power supply from the power source to the one or more conductive tracks in order to maintain the one or more conductive tracks at a desired temperature based on the feedback signal. The one or more conductive tracks include a plurality of parts, each of which can be separately connected to the power supply. A method characterized by the following:
  10. The method according to 9, characterized in that the step of forming one or more conductive tracks includes the step of adding foil over the entire surface of the polyimide substrate, and then removing a portion of the foil so that one or more conductive tracks remain.
  11. The method according to 9 or 10, characterized in that the step of forming one or more conductive tracks includes a step of forming the one or more conductive tracks in a pattern on a continuous surface of the polyimide substrate such that the covered portions of the polyimide substrate are covered by the one or more conductive tracks, and the uncovered portions of the polyimide substrate are located between the covered portions of the polyimide substrate.
  12. Furthermore, the method according to 9 or 10 is characterized by comprising the step of adding a protective layer on one or more conductive tracks.

Description

This invention relates to an electrically heated smoking system including a heater for heating an aerosol-forming substrate. US-A-5 353 813 discloses a tubular array with blades for use as an external heating element in an electric smoking article. The heating element includes several carbon blades arranged around a reinforcing tube of spiral-wound cardboard. One electrical connection is formed at the free end of each blade, while a common ring of carbon connects to the other end of each carbon blade, forming a common electrical connection. When power is supplied to the blades, they heat up, resulting in a heated section with temperatures ranging from 300°C to approximately 900°C. US-A-5 353 813 This figure shows a first embodiment of a method for forming a heater for an electric smoking system.This figure shows a first embodiment of a method for forming a heater for an electric smoking system.This figure shows a first embodiment of a method for forming a heater for an electric smoking system.This figure shows a first embodiment of a method for forming a heater for an electric smoking system.This figure shows a second embodiment of a method for forming a heater for an electric smoking system.This figure shows a second embodiment of a method for forming a heater for an electric smoking system.This figure shows a second embodiment of a method for forming a heater for an electric smoking system.This figure shows a second embodiment of a method for forming a heater for an electric smoking system.This figure shows a second embodiment of a method for forming a heater for an electric smoking system.This figure shows a third embodiment of a method for forming a heater for an electric smoking system.This figure shows a third embodiment of a method for forming a heater for an electric smoking system.This figure shows a third embodiment of a method for forming a heater for an electric smoking system.This figure shows a third embodiment of a method for forming a heater for an electric smoking system.This figure shows a third embodiment of a method for forming a heater for an electric smoking system.This figure shows a third embodiment of a method for forming a heater for an electric smoking system.This figure shows a first embodiment of a heater for use in an electrically heated smoking system.This figure shows a second embodiment of a heater for use in an electrically heated smoking system.This figure shows a second embodiment of a heater for use in an electrically heated smoking system. As described above, the present invention provides an electrically heated smoking system including a heater. The heater includes one or more conductive tracks on an electrically insulating substrate. The heater can be formed by several different manufacturing processes. Figures 1a to 1d show the first manufacturing process. Figures 2a to 2d show the second manufacturing process. Figures 3a to 3d show the third manufacturing process. Figures 1a to 1d show a manufacturing process using a technique similar to that used in screen printing. This manufacturing process can be used in conjunction with the first or second aspects of the present invention. Referring to Figure 1a, first, an electrical insulating substrate 101 is prepared. The electrical insulating substrate can include any suitable electrical insulating material, such as ceramics like MICA, glass, or paper, but is not limited to the following. Alternatively, the electrical insulating substrate can include an electrical conductor insulated from the conductive track by, for example, oxidation or anodizing of its surface or both (produced in Figure 1b and described below). One example is anodized aluminum. Alternatively, the electrical insulating substrate can contain an electrical conductor to which an intermediate coating called a glaze is added. In this case, the glaze has two functions: to electrically insulate the substrate from the conductive track and to reduce bending of the substrate. Folds present in the electrical insulating substrate can lead to cracks in the conductive paste (applied in Figure 1b and described below), which can cause damage to the resistor. Referring to Figure 1b, the electrical insulating substrate is securely held, for example, by vacuum, while the metal paste 105 is coated onto the electrical insulating substrate using the notches 107. Any suitable metal paste can be used, but as an example, the metal paste is silver paste. In particularly advantageous examples, the paste contains 20% to 30% binder and plasticizer, and 70% to 80% metal particles, typically silver particles. The notches 107 provide a template for the desired conductive track. After the metal paste 05 is coated onto the electrical insulating substrate 101, the electrical insulating substrate and paste are fired, for example, in a sintering furnace. In the first firing phase between 200°C and 400°C, the organic binder and solvent are burned out. In the second firing phase between 350°C