KR-102963540-B1 - Aerosol generator having a heating zone insulation

KR102963540B1KR 102963540 B1KR102963540 B1KR 102963540B1KR-102963540-B1

Abstract

An aerosol generating device (100) for heating an aerosol forming substrate (20) provided in an aerosol generating article (10) comprises a longitudinally extending cavity (110) for receiving a distal portion of the aerosol generating article. The longitudinally extending cavity has a longitudinal axis and is defined by a base (102), sidewalls (103) extending from the base, and an opening (111) at the opposite end of the cavity relative to the base. The inner surface of the sidewalls defines a stabilizing portion (120) of the cavity having a first diameter and a heating portion (130) of the cavity located between the stabilizing portion and the base, having a second diameter larger than the first diameter. The difference between the first diameter and the second diameter provides a gap (160) separating the aerosol generating article from the sidewalls of the cavity. This gap can help prevent heat release from the aerosol forming substrate during use and improve aerosol delivery. Additionally, the inner wall surface of the cavity further defines a positioning portion (140) positioned at the distal end of the cavity, the heating portion is positioned between the stabilization portion and the positioning portion, and the positioning portion of the cavity has a third diameter substantially equal to the first diameter of the stabilization portion.

Inventors

카펠리, 세바스티앙
에멋, 로버트
라토르, 에바 사드

Assignees

필립모리스 프로덕츠 에스.에이.

Dates

Publication Date: 20260513
Application Date: 20200422
Priority Date: 20190429

Claims (14)

An aerosol generating device for heating an aerosol forming substrate provided in an aerosol generating article that is substantially cylindrical, wherein the aerosol generating device comprises: The aerosol generating article comprises a longitudinally extending cavity for receiving a distal portion thereof, wherein the longitudinally extending cavity is defined by a base having a longitudinal axis, side walls extending from the base, and an opening at the opposite end of the cavity relative to the base. Here, the inner surfaces of the sidewalls define a stabilizing portion of the cavity having a first diameter and a heating portion of the cavity located between the stabilizing portion and the base, and the heating portion has a second diameter larger than the first diameter, An aerosol generating device, wherein the inner wall surface of the above cavity further defines a positioning portion disposed at the distal end of the above cavity, the heating portion disposed between the stabilizing portion and the positioning portion, and the positioning portion of the above cavity having a third diameter substantially identical to the first diameter of the stabilizing portion.
An aerosol generating device according to claim 1, wherein the cross-sectional area of the cavity within the heating portion is 110% to 300% larger than the cross-sectional area of the cavity within the stabilization portion.
An aerosol generating device according to claim 1, wherein the difference in diameter between the stabilizing portion and the heating portion provides one or more insulating air pockets surrounding the outer surface of the aerosol generating article when the distal portion of the aerosol generating article is inserted into a cavity extending in the longitudinal direction.
An aerosol generating device according to claim 1, wherein the air inlet is defined through the base.
An aerosol generating device according to claim 1, wherein the inner wall surface of the cavity defines a tapered region in which the diameter of the cavity changes at a constant gradient between the second diameter and the third diameter.
An aerosol generating device according to claim 1, wherein the difference in diameter between the first diameter in the stabilization portion and the second diameter in the heating portion is a gap diameter, and the gap diameter is 0.5 mm to 5 mm.
An aerosol generating device according to claim 6, wherein the inner surface of the sidewalls comprises one or more ribs extending longitudinally from the heating portion and extending radially from the inner surface of the sidewalls, said ribs having a radial dimension equal to the gap diameter.
An aerosol generating device according to claim 1, comprising a first body portion accommodating at least a portion of a power source, a control electronic device, and a heating means, and a second body portion movable with respect to the first body portion, wherein a cavity extending in the longitudinal direction is defined within the second body portion.
An aerosol generating device according to claim 8, wherein the second body portion is movably coupled to the first body portion between a first position and a second position, the first position is an operating position defined by the heating means capable of engaging with the aerosol generating article, and the second position is an extraction position defined by the aerosol generating article that is at least partially emitted from the longitudinally extended cavity.
An aerosol generating device according to claim 1, wherein the heating element extends into the heating portion of the above cavity.
An aerosol generating system comprising an aerosol generating article and an aerosol generating device configured to heat the aerosol generating article, The aerosol generating device comprises a longitudinally extending cavity for receiving a distal portion of the aerosol generating article, wherein the longitudinally extending cavity has a longitudinal axis and is defined by a base, side walls extending from the base, and an opening at the opposite end of the cavity relative to the base. The inner surfaces of the above sidewalls define a stabilizing portion of the cavity having a first diameter and a heating portion of the cavity located between the stabilizing portion and the base, wherein the heating portion has a second diameter larger than the first diameter. An aerosol generating system, wherein the inner wall surface of the above cavity further defines a positioning portion disposed at the distal end of the above cavity, wherein the heating portion is disposed between the stabilizing portion and the positioning portion, and the positioning portion of the above cavity has a third diameter substantially identical to the first diameter of the stabilizing portion.
An aerosol generating system according to claim 11, wherein the aerosol generating article is a substantially cylindrical aerosol generating article to be heated together with the device, and the aerosol generating article has a longitudinal axis and an article diameter, and a first diameter of a cavity extending longitudinally in the aerosol generating device is substantially the same as the article diameter.
An aerosol generating system according to claim 11, wherein the aerosol generating article comprises a plurality of coaxially aligned components, the aerosol generating material being assembled within a wrapper to form a substantially cylindrical article having a longitudinal axis and an article diameter, the aerosol generating article having a proximal portion ending at a proximal end and a distal portion ending at a distal end, and the aerosol generating material being located in the distal portion of the article.
In paragraph 11, the aerosol generating device is an aerosol generating system as defined in any one of paragraphs 2 through 10.

Description

Aerosol generator having a heating zone insulation The present invention relates to an aerosol generating device for heating an aerosol-forming substrate. In particular, the aerosol generating device is configured to provide improved thermal insulation of the aerosol-forming substrate. A number of prior art documents disclose aerosol generating devices, for example, including heated aerosol generating systems and electric heated aerosol generating systems. An example of a heated aerosol generating system is disclosed in WO2013/076098, which describes an embodiment in which an aerosol-forming substrate of an aerosol generating article is penetrated by a heating element of an aerosol generating device to generate an inhalable aerosol. The heating element comes into contact with the aerosol-forming substrate and raises the temperature of the substrate, thereby evaporating the volatile components of the substrate. When the aerosol-forming substrate is consumed, the aerosol generating article containing the aerosol-forming substrate is removed from the aerosol generating device and disposed of. The aerosol generating article disclosed in WO2013/076098 is fitted snugly into a cavity of the extractor portion of the aerosol generating device. This provides a snug fit that holds the article within the cavity. The heat supplied to the aerosol-forming substrate rapidly raises the temperature of the substrate due to direct contact between the heating element and the substrate. However, heat is also rapidly removed from the article by conduction into the walls of the cavity, which can act as a heat sink. WO2018/050735 discloses an embodiment of an aerosol generating device in which ribs are provided in an aerosol generating article cavity to provide improved retention of the aerosol generating article within the cavity. The ribs are spaced apart to define airflow channels between adjacent ribs and possibly also between discontinuous ribs. The ribs are preferably arranged in an inclined manner so that the user can extract the aerosol generating article by applying an axial force with torque to facilitate removal. However, significant contact points between the aerosol generating article and the ribs in the cavity still exist, and the airflow between the longitudinal ribs also contributes to the cooling of the aerosol forming material. The disclosure of the present invention relates to an aerosol generating device for heating an aerosol forming substrate. The aerosol forming substrate may be provided within an aerosol generating article. The aerosol generating article may be substantially cylindrical. The aerosol generating device may include a longitudinally extending cavity for receiving a distal portion of the aerosol generating article. The longitudinally extending cavity may have a longitudinal axis. The longitudinal cavity may be defined by a base, a sidewall extending from the base, and an opening at the opposite end of the cavity relative to the base. The inner surface of the sidewall defines a first portion of the cavity having a first diameter. The first portion of the cavity may be a stabilizing portion. A second portion of the cavity having a second diameter may be located between the stabilizing portion and the base. The second portion may be a heating portion. The second diameter may be larger than the first diameter. In a preferred embodiment, an aerosol generating device is provided for heating an aerosol forming substrate provided in a substantially cylindrical aerosol generating article. The aerosol generating device comprises a longitudinally extending cavity for receiving a distal portion of the aerosol generating article. The longitudinally extending cavity has a longitudinal axis and is defined by a base, a side wall extending from the base, and an opening at the opposite end of the cavity relative to the base. The inner surface of the side wall defines a stabilizing portion of the cavity having a first diameter. A heating portion of the cavity is located between the stabilizing portion and the base. The heating portion has a second diameter larger than the first diameter. The diameter of the stabilization portion allows the distal portion of the aerosol generating article to be inserted through it. When the distal portion of the aerosol generating article is inserted through the stabilization portion, there is preferably a minimum space between the outer surface of the aerosol generating article and the inner surface of the stabilization portion. Preferably, a tight fit or snug fit exists between the aerosol generating article and the stabilization portion. Preferably, when the aerosol generating article is received within the cavity, there is no gap between the outer surface of the aerosol generating article and the inner surface of the stabilization portion. The outer surface of the aerosol generating article may come into contact with the inner surface of the stabilization portion when the articl