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KR-20260067376-A - Heating assembly for an aerosol generating device

KR20260067376AKR 20260067376 AKR20260067376 AKR 20260067376AKR-20260067376-A

Abstract

A heating assembly for an aerosol generating device is disclosed. The heating assembly (10, 110, 210) comprises: an outer tube (14, 114, 214) having a first end and a second end; an inner tube (12, 112, 212) having an opening (16, 116, 216) for receiving an aerosol forming material provided at the first end of the outer tube, and having a vacuum insulation space (24, 124, 224) provided between the inner tube and the outer tube; a heating element (26, 126, 226) disposed on an outward surface (28, 128, 228) of the inner tube between the inner tube and the outer tube; and one or more pieces of getter material (30, 130, 138, 230) provided on the outward surface of the inner tube within the vacuum insulation space.

Inventors

  • 브루나 마테오

Assignees

  • 제이티 인터내셔널 소시에떼 아노님

Dates

Publication Date
20260512
Application Date
20241203
Priority Date
20231204

Claims (13)

  1. In a heating assembly for an aerosol generating device, An outer tube having a first end and a second end; An inner tube having an opening for receiving an aerosol-forming material provided at a first end of the outer tube, and a vacuum insulation space provided between the inner tube and the outer tube; A heating element disposed on the outward surface of the inner tube between the inner tube and the outer tube; and A heating assembly comprising one or more pieces of getter material provided on the outward surface of the inner tube within the vacuum insulation space.
  2. In paragraph 1, A heating assembly in which one or more of the above-mentioned getter material pieces are provided on at least a portion of the inward surface of the above-mentioned outer tube.
  3. In paragraph 2, One or more pieces of getter material completely cover the inward surface of the outer tube, forming a heating assembly.
  4. In any one of paragraphs 1 through 3, A heating assembly in which one or more pieces of getter material on the outward surface of the inner tube at least partially cover the heating element.
  5. In any one of paragraphs 1 through 4, The above one or more getter material pieces are, A heating assembly comprising at least one of a barium-based getter alloy; a zirconium-based getter alloy; titanium or a titanium-based getter alloy; indium or an indium-based getter alloy; and a non-evaporative getter alloy.
  6. As an aerosol generating device configured to generate an aerosol for a user to inhale, A heating assembly according to any one of claims 1 to 5; and An aerosol generating device including a power source that supplies power to a heating element.
  7. A method for manufacturing a heating assembly for an aerosol generating device, A step of providing an outer tube having a first end and a second end; A step of providing an inner tube having an opening for receiving an aerosol-forming substrate; A step of placing a heating element on the outward surface of the inner tube between the inner tube and the outer tube; A step of providing one or more pieces of getter material; A step of arranging the inner tube and the outer tube such that an opening is located at a first end of the outer tube and provides an insulating space between the outer tube and the inner tube, wherein one or more pieces of getter material are formed on at least the outward surface of the inner tube within the insulating space; and A method for manufacturing a heating assembly comprising the step of forming a vacuum in the above-mentioned insulating space.
  8. In Paragraph 7, A method for manufacturing a heating assembly in which one or more of the above-mentioned getter material pieces are formed on at least a portion of the inward surface of the above-mentioned outer tube.
  9. In paragraph 8, A method for manufacturing a heating assembly in which one or more pieces of getter material are formed to completely cover the inward surface of the outer tube.
  10. In any one of paragraphs 7 through 9, A method for manufacturing a heating assembly, wherein one or more pieces of getter material are formed on the outward surface of the inner tube to at least partially cover the heating element.
  11. In any one of paragraphs 7 through 10, A method for manufacturing a heating assembly, further comprising the step of activating one or more of the above-mentioned getter material pieces.
  12. In Paragraph 11, A method for manufacturing a heating assembly, wherein the step of activating one or more pieces of getter material comprises heating the heating assembly to an activation temperature, preferably wherein the activation temperature is higher than the operating temperature of the heating assembly.
  13. In Article 11 or Article 12, A method for manufacturing a heated assembly, wherein the step of activating one or more of the above-mentioned getter material pieces is performed while forming the vacuum.

Description

Heating assembly for an aerosol generating device The present invention relates to a heating assembly for an aerosol generating device and an aerosol generating device comprising the heating assembly. The present disclosure is particularly applicable to a portable aerosol generating device that may be self-contained. In particular, the present invention relates to an aerosol generating device having a heating element disposed within a vacuum chamber. There is growing interest in the field of manufacturing electronic cigarettes that heat solid or semi-solid aerosol-forming substrates, including tobacco, without combustion. These devices typically accommodate a tobacco stick within a heating chamber. The stick is heated to release an aerosol that can be inhaled by a user. One problem with these devices is that the heater supplying heat to the heating chamber can also undesirably heat the rest of the device. In small devices, this can be undesirable because the temperature of the outer surface of the device held by the user can become unacceptably high. To mitigate this effect, some aerosol-generating devices are equipped with a vacuum chamber that can separate the heater from the outer surface. This can provide thermal separation between the outer surface held by the user and the heating chamber. In such an aerosol generating device, it is desirable to improve the efficiency of the heating operation so that the device's battery life can be extended. To this end, a vacuum insulation material is implemented within the aerosol generating device to limit heat loss to the external environment by insulating the cavity where the aerosol substrate is heated. Now, embodiments of the present invention will be described exemplarily with reference to the drawings. FIG. 1 is a perspective view of an aerosol generating device including a heating assembly. Figure 2 is a schematic cross-sectional view of a heating assembly. Figure 3 is a schematic cross-sectional view of a heating assembly. Figure 4 is a schematic cross-sectional view of a heating assembly. As described herein, vapor is generally understood to refer to a substance in a gaseous state at a temperature lower than its critical temperature, implying that the vapor can condense into a liquid by increasing the pressure without lowering the temperature, whereas an aerosol is a suspension of fine solid particles or liquid droplets in air or another gas. However, it should be noted that the terms 'aerosol' and 'vapor' may be used interchangeably in this specification, particularly in relation to the form of the inhalable medium produced for the user to inhale. FIG. 1 illustrates an aerosol generating device (2) according to one embodiment of the present invention. The aerosol generating device (2) is illustrated in an assembled configuration showing exemplary internal components. The aerosol generating device (2) is a heat-not-burn device, which may also be referred to as a tobacco-vapor device, and includes a heating assembly (4) configured to receive an aerosol substrate, such as a stick of aerosol generating material (e.g., tobacco). The aerosol generating device (2) may include a power source, such as a battery, and a control circuit for controlling the power supply from the power source to the heating assembly (4). The heating assembly (4) is operable to heat the stick of aerosol generating material without burning it in order to generate vapor or aerosol for a user to inhale. Of course, those skilled in the art will understand that the aerosol generating device (2) illustrated in FIG. 1 is simply an exemplary aerosol generating device according to the present invention. As an aerosol generating device according to the present invention, tobacco-vapor products, vaporizers, or electronic cigarettes of other types and configurations may be used. FIG. 2 illustrates a schematic diagram of a heating assembly (10) having an inner tube (12) and an outer tube (14). The heating assembly (10) includes an opening (16) defined by the inner tube (12) and provided at a first end of the heating assembly (10), through which an aerosol-forming material or consumable can be received in the cavity (18) of the heating assembly (10). In other words, the opening (16) serves as an access point for inserting the consumable into the heating assembly (10) in its configured form. The inner tube (12) comprises a metallic material, such as stainless steel, having excellent thermal conductivity. The inner tube (12) further comprises a base wall (20) to provide a closed end of the inner tube (12), thereby forming a heater cup shape. In use, the base wall (20) serves to limit the insertion depth of the consumable. The outer tube (14) also comprises a metallic material, such as steel or stainless steel, which is easily formed into a tube or cylindrical shape. In this example, as the inner tube (12) is positioned radially within the inward surface (22) of the outer tube (14), the inner and outer