EP-4740763-A1 - HEATING ASSEMBLY AND AEROSOL GENERATING DEVICE

EP4740763A1EP 4740763 A1EP4740763 A1EP 4740763A1EP-4740763-A1

Abstract

Embodiments of this application relate to a heating assembly and an aerosol generating device. The heating assembly includes: a heating tube in which a heating cavity accommodating at least a part of an aerosol generating article is provided; a temperature measurement element, including a probe and a conductive pin connected to the probe, where the probe is in contact with an outer surface of the heating tube; and a fixing tube, arranged on a periphery of at least a part of the heating tube, where the probe is located between the heating tube and the fixing tube, and the probe is elastic and elastically abuts against the heating tube or the fixing tube.

Inventors

GONG, Weifeng
XU, Zhongli
LI, Yonghai

Assignees

Shenzhen First Union Technology Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20240709

Claims (20)

A heating assembly, comprising: a heating tube in which a heating cavity accommodating at least a part of an aerosol generating article is provided; a temperature measurement element, comprising a probe and a conductive pin connected to the probe, wherein the probe is in contact with an outer surface of the heating tube; and a fixing tube, arranged on a periphery of at least a part of the heating tube, wherein the probe is located between the heating tube and the fixing tube, and the probe is elastic and elastically abuts against the heating tube or the fixing tube.
The heating assembly according to claim 1, wherein the probe comprises a thermal conductive element and an elastic member combined on the thermal conductive element, the thermal conductive element is tightly attached to the heating tube, and the elastic member elastically abuts against the heating tube or the fixing tube.
The heating assembly according to claim 1, wherein the probe comprises a thermal conductive element, an elastic arm is arranged on the thermal conductive element, and the elastic arm elastically abuts against the heating tube or the fixing tube.
The heating assembly according to claim 1, wherein the probe comprises a thermal conductive element, the thermal conductive element is tightly attached to the heating tube, and the conductive pin comprises a first thermocouple wire and a second thermocouple wire; and the first thermocouple wire and the second thermocouple wire are electrically connected to form a thermocouple, and a hot junction of the thermocouple is connected to the thermal conductive element; or the thermal conductive element comprises a conductor, and the first thermocouple wire and the second thermocouple wire are electrically connected through the conductor and form a thermocouple.
The heating assembly according to claim 4, wherein an insulating layer exists on a surface of at least one of the heating tube and the thermal conductive element.
The heating assembly according to claim 1, wherein the probe comprises a first abutting portion and a second abutting portion, the first abutting portion abuts against the heating tube, the second abutting portion comprises an elastic arm, and the elastic arm abuts against the fixing tube.
The heating assembly according to claim 6, wherein an accommodating space exists between the first abutting portion and the second abutting portion, and an end portion of the conductive pin is accommodated in the accommodating space.
The heating assembly according to claim 7, wherein a window for welding laser or a welding head to pass through is formed on the second abutting portion, and the window is in communication with the accommodating space and provided directly facing the end portion of the conductive pin.
The heating assembly according to claim 6, wherein the first abutting portion comprises a first abutting surface with at least a partial region abutting against the heating tube, and at least a partial edge of the first abutting surface extends toward a direction in which the second abutting portion is located.
The heating assembly according to claim 9, wherein the at least a partial region of the first abutting surface is an arc-shaped surface attached to the outer surface of the heating tube.
The heating assembly according to claim 6, wherein the elastic arm comprises a cantilever with a free end, the free end of the cantilever extends toward a direction in which the first abutting portion is located to form an arc-shaped second abutting surface on a surface of the second abutting portion, and the second abutting surface abuts against the fixing tube.
The heating assembly according to claim 1, wherein the conductive pin comprises a bending portion, the heating assembly further comprises an anti-retraction portion, and the anti-retraction portion is configured to have a capability of stopping the bending portion.
The heating assembly according to claim 12, wherein the anti-retraction portion comprises a first through hole that is provided on the fixing tube and that is for the probe to pass through, and at least a part of the bending portion is formed in the first through hole.
The heating assembly according to claim 12, wherein the heating assembly further comprises a first layered component arranged between the heating tube and the fixing tube, and a first guiding groove is provided on the first layered component; and a surface of the heating tube comprises a first position and a second position that is in contact with the probe, the first guiding groove communicates the first position with the second position, and the conductive pin comprises the bending portion at the first position or a position close to the first position.
The heating assembly according to claim 14, wherein the second position is exposed in the first guiding groove, and the probe is stopped by an extension end point of the first guiding groove at the second position.
The heating assembly according to claim 14, wherein the first position is exposed in the first guiding groove, the anti-retraction portion comprises an extension start point of the first guiding groove, and the extension start point is adjacent to the first position.
The heating assembly according to claim 14, wherein a width of the first guiding groove is greater than or equal to a width of the temperature measurement element.
The heating assembly according to claim 14, wherein the first layered component comprises a heat preservation layer.
The heating assembly according to claim 12, wherein the heating assembly further comprises an end cover connected to an end portion of the heating tube, the anti-retraction portion comprises a second through hole that is provided on the end cover and that is through which the conductive pin passes, and the bending portion is arranged adjacent to the end cover and located between the end cover and the probe.
The heating assembly according to claim 1, wherein the heating assembly further comprises an electrical connector electrically connected to the heating tube, at least a part of the electrical connector is arranged between the heating tube and the fixing tube, the electrical connector abuts against the fixing tube to provide a tensioning force causing the fixing tube to tension, and the fixing tube is configured to extrude the probe inward in a radial direction of the heating tube under an action of the tensioning force.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202310842632.1, filed with the China National Intellectual Property Administration on July 11, 2023 and entitled "HEATING ASSEMBLY AND AEROSOL GENERATING DEVICE", which is incorporated herein by reference in its entirety. TECHNICAL FIELD Embodiments of this application relate to the technical field of aerosol generating devices, and specifically, to a heating assembly and an aerosol generating device. BACKGROUND An aerosol generating device includes a heating assembly, and the heating assembly is usually an electric heating assembly. The electric heating assembly releases heat when being electrically conducted, to heat an aerosol generating article, so that the aerosol generating article generates aerosols without being burnt. In some existing aerosol generating devices, a temperature measurement element configured to detect a temperature of the heating assembly is usually further included, and the temperature measurement element is generally connected to the electric heating assembly in a welding manner. However, an insulating layer on a surface of the electric heating assembly may be damaged due to welding. In addition, when the electric heating assembly is a film layer formed on a base, the temperature measurement element welded to the electric heating assembly may pull the film layer. As a result, the film layer is cracked or separated from the base. SUMMARY Embodiments of this application provide a heating assembly and an aerosol generating device, ensuring that a temperature measurement element can be stably connected to a heating tube and does not damage the heating tube. An embodiment of this application provides a heating assembly, including: a heating tube in which a heating cavity accommodating at least a part of an aerosol generating article is provided;a temperature measurement element, including a probe and a conductive pin connected to the probe, where the probe is in contact with an outer surface of the heating tube; anda fixing tube, arranged on a periphery of at least a part of the heating tube, wherethe probe is located between the heating tube and the fixing tube, and the probe is elastic and elastically abuts against the heating tube or the fixing tube. An embodiment of this application provides an aerosol generating device, including the heating assembly and further including a power supply assembly providing electric power to the heating assembly. According to the heating assembly and the aerosol generating device, the probe of the temperature measurement element is elastic, and the probe can elastically abut against the heating tube or the fixing tube, so that the probe can be stably kept between the heating tube and the fixing tube and the probe can be tightly attached to the heating tube. In this way, compared with keeping a connection between the probe and the heating tube in a welding manner, a surface layer of the heating tube can be better protected from being damaged, and it can be easier to combine the temperature measurement element with the heating tube. BRIEF DESCRIPTION OF THE DRAWINGS One or more embodiments are exemplarily described with reference to the corresponding figures in the accompanying drawings, and the descriptions do not constitute a limitation to the embodiments. Elements in the accompanying drawings that have same reference numerals are represented as similar elements, and unless otherwise particularly stated, the figures in the accompanying drawings are not drawn to scale. FIG. 1 is a schematic diagram of an aerosol generating device according to an embodiment of this application;FIG. 2 is a schematic diagram of a heating assembly according to an embodiment of this application;FIG. 3 is an exploded view of a heating assembly according to an embodiment of this application;FIG. 4 is a schematic diagram of a first layered component according to an embodiment of this application;FIG. 5 is a schematic diagram of an electrical connector according to an embodiment of this application;FIG. 6 is a schematic diagram of a fixing tube according to an embodiment of this application;FIG. 7 is a schematic diagram of an electric heating element according to an embodiment of this application;FIG. 8 is another schematic diagram of an electric heating element according to an embodiment of this application;FIG. 9 is a schematic diagram of a heating assembly with a fixing tube removed according to an embodiment of this application;FIG. 10 is a schematic diagram of a heating assembly with an end cover according to an embodiment of this application;FIG. 11 is a schematic diagram of a temperature measurement element according to an embodiment of this application;FIG. 12 is another schematic diagram of a temperature measurement element according to an embodiment of this application; andFIG. 13 is still another schematic diagram of a temperature measurement element according