Search

EP-4136988-B1 - HEATING ELEMENT, AEROSOL PRODUCER, AND AEROSOL ARTICLE

EP4136988B1EP 4136988 B1EP4136988 B1EP 4136988B1EP-4136988-B1

Inventors

  • LIU, TUANFANG

Dates

Publication Date
20260513
Application Date
20220323

Claims (5)

  1. A heating element, comprising a main body (1); characterised in that: the main body (1) comprises an elongated sheet (107) and a tube (106); one end of the tube (106) is a sealed end, and the other end of the tube (106) is an open end; the elongated sheet (107) comprises a notch (105) extending along a length of the main body (1); the tube (106) is fixedly disposed in the notch (105), and the sealed end of the tube (106) abuts against a base of the notch (105); the tube (106) comprises a thermal air chamber (103); and at least one through hole (102) communicates with the thermal air chamber (103).
  2. The heating element of claim 1, wherein the heating element further comprises a temperature sensor disposed in the tube (106).
  3. The heating element of claim 2, wherein the main body (1) further comprises a top part and the thermal air chamber (103) comprises a top portion; a preset distance exists between the top part and the top portion; and the thermal air chamber (103) is disposed in the middle of the main body (1) and extends along a length of the main body (1).
  4. An aerosol-generating device, comprising a cavity, and the heating element of claim 1 disposed in the cavity.
  5. An aerosol-generating article, comprising a tobacco material and the heating element of claim 1 disposed in the tobacco material.

Description

BACKGROUND The disclosure relates to the field of electronic cigarette, and more particularly, to a heating element, an aerosol article, and an aerosol producer. Conventionally, cigarettes release an aerosol-based odor by a low-temperature heating method so that the cigarettes can be heated without combustion. As cigarettes are heated to 350°C to 1000°C, some harmful substances are released into the air. The low-temperature heating method allows the cigarettes to generate smoke at a temperature below 300°C while reducing the release of harmful substances from the cigarette. For example, each of EP 3610736 A1, CN 207023242 U and WO 2021/123368 A1 discloses a heating element for low-temperature heating. Tobacco materials are usually heated through heating rods and heating plates, which may cause uneven heating of the tobacco materials. Alternatively, the heating rods are arranged around the tobacco materials, contributing to the increased heating area; however, uneven heating occurs in the middle portion of the tobacco materials, which affects a taste in the mouth of a user. The first objective of the disclosure is to provide a heating element according to claim 1. In a class of this embodiment, which is not covered by the present invention, the main body is in an elongated shape; and the thermal air chamber extends along the length of the main body. In a class of this embodiment, which is not covered by the present invention, the thermal air chamber comprises a first chamber. In a class of this embodiment, the heating element further comprises a temperature sensor disposed in the tube. In a class of this embodiment, which is not covered by the present invention, the first chamber is surrounded by a side wall and the at least one through hole is disposed on the side wall; and the first chamber communicates with outside air of the main body through the at least one through hole. In a class of this embodiment, which is not covered by the present invention, the thermal air chamber further comprises a second chamber communicating with the first chamber. In a class of this embodiment, which is not covered by the present invention, the second chamber is surrounded by a side wall and the at least one through hole is disposed on the side wall; and the second chamber communicates with outside air of the main body through the at least one through hole. In a class of this embodiment, which is not covered by the present invention, the main body further comprises an elongated sheet, a first side wall, and a second side wall; the first side wall and the second side wall are disposed oppositely to each other; the first chamber is surrounded by the first side wall and/or the second side wall; and the first side wall and/or the second side wall is disposed on the elongated sheet. In a class of this embodiment, which is not covered by the present invention, the elongated sheet comprises a notch extending along the length of the main body; the notch is surrounded by the first side wall and the second side wall, thus forming the first chamber; and at least one of the first side wall and the second side wall is convex with respect to the elongated sheet. In a class of this embodiment, the main body further comprises a top part and the thermal air chamber comprises a top portion; a preset distance exists between the top part and the top portion; and the thermal air chamber is disposed in the middle of the main body and extends along the length of the main body. In a class of this embodiment, which is not covered by the present invention, the main body further comprises an annular wall surrounding an annular space; the annular wall comprises a first side wall and a second side wall disposed oppositely to the first side wall; the first chamber is surrounded by the first side wall and the second side wall; and the annular space outside the first chamber defines the second chamber. In a class of this embodiment, the main body comprises a rigid conductive material; or, the main body further comprises a rigid nonconductive material, and a conductive layer is disposed on an outer wall of the main body. In a class of this embodiment, which is not covered by the present invention, the main body comprises a rigid non-metallic material, and the conductive layer is further disposed on an inner wall of the thermal air chamber; the conductive layer is further disposed on a side wall surrounding the at least one through hole; and the main body further comprises a passivation layer disposed on the conductive layer. The second objective of the disclosure is to provide an aerosol producer; the aerosol producer comprises a cavity, and the aforesaid heating element disposed in the cavity. The third objective of the disclosure is to provide an aerosol article; the aerosol article comprises a tobacco material and the aforesaid heating element disposed in the tobacco material. The following advantages are associated with the heating element, the aerosol