Aerosol-generating device with connection elements
Flexible connection elements in aerosol-generating devices adjust for manufacturing tolerances, facilitating easy assembly and reliable connections, enhancing device compactness and airflow integrity.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2026-04-02
AI Technical Summary
Existing aerosol-generating devices face challenges in easy assembly, compact design, and accommodating manufacturing tolerances between the heater module and heater casing, leading to unreliable connections and airflow issues.
Incorporating flexible upstream and downstream connection elements made of materials like rubber or elastomer, which can be compressed and bent to adjust for manufacturing tolerances, providing secure, airtight, and flexible connections between the heater module and heater casing, ensuring proper assembly and airflow integrity.
The solution enables easy assembly, maintains a compact design, and compensates for manufacturing variations, ensuring reliable and airtight connections while allowing for efficient aerosol generation.
Smart Images

Figure CN2024121366_02042026_PF_FP_ABST
Abstract
Description
AEROSOL-GENERATING DEVICE WITH CONNECTION ELEMENTS
[0001] The present disclosure relates to an aerosol-generating device with connection elements. The present disclosure further relates to a method of assembling an aerosol-generating device using the connection elements.
[0002] It is known to provide an aerosol-generating device for generating an inhalable vapor. Such devices may heat an aerosol-forming substrate contained in an aerosol-generating article without burning the aerosol-forming substrate. The aerosol-generating device may comprise a heating module comprising a heating element and including a heating chamber for receiving the aerosol-generating article. The heating module may be housed in a heater casing.
[0003] Upon heating to a target temperature, the aerosol-forming substrate vaporises to form an aerosol.
[0004] It would be desirable to provide an aerosol-generating device which can easily be assembled and which is compact. It would be desirable to provide an aerosol-generating device with a high manufacturing tolerance. It would be desirable to provide an aerosol-generating device wherein the heating module can easily be positioned within the heater casing. It would be desirable to provide an aerosol-generating device wherein the heating module can easily be positioned within the heater casing despite large manufacturing tolerances of one or both of the heater casing and the heater module.
[0005] According to an embodiment of the invention there is provided an aerosol-generating device. The aerosol-generating device may comprise a heater module. The aerosol-generating device may comprise a heater casing. The heater casing may comprise a heater casing downstream part and the heater casing upstream part. The aerosol-generating device may comprise a flexible upstream connection element. The aerosol-generating device may comprise a flexible downstream connection element. The heater casing may house the heater module. The heater module may be mounted in the heater casing between the flexible upstream connection element and the flexible downstream connection element.
[0006] According to an embodiment of the invention there is provided an aerosol-generating device. The aerosol-generating device comprises a heater module and a heater casing. The heater casing comprises a heater casing downstream part and a heater casing upstream part. Furthermore, the aerosol-generating device comprises a flexible upstream connection element and a flexible downstream connection element. The heater casing houses the heater module, wherein the heater module is mounted in the heater casing between the flexible upstream connection element and the flexible downstream connection element.
[0007] As used herein, the terms “upstream” , and “downstream” , are used to describe the relative positions of components, or portions of components, of the aerosol-generating device in relation to the direction in which air flows through the aerosol-generating device during use thereof along the air flow path. Aerosol-generating devices according to the invention comprise a proximal end through which, in use, an aerosol exits the device. The proximal end of the aerosol generating device may also be referred to as the mouth end or the downstream end. The mouth end is downstream of the distal end. The distal end of the aerosol-generating article may also be referred to as the upstream end. Components, or portions of components, of the aerosol generating device may be described as being upstream or downstream of one another based on their relative positions with respect to the airflow path of the aerosol generating device.
[0008] It might be possible to compensate for manufacturing tolerances of the heater module in relation to the heater casing upstream part owing to the flexible upstream connection element. It might be possible to compensate for manufacturing tolerances of the heater module in relation to the heater casing downstream part owing to the flexible downstream connection element. Compressing and bending one or both of the flexible upstream connection element and the flexible downstream connection element may provide means for adjusting the manufacturing tolerances.
[0009] The flexible upstream connection element may be configured to provide a flexible connection between the heater module and the heater casing upstream part. The flexible downstream connection element may be configured to provide a flexible connection between the heater module and the heater casing downstream part.
[0010] The heater module may comprise a downstream end. The flexible downstream connection element may comprise a heater downstream connection recess. The heater downstream connection recess may be configured for engaging with the downstream end of the heater module. In particular, the downstream end of the heater module may be configured to be inserted into the heater downstream connection recess. The downstream end of the heater module may comprise a downstream bent rim. The bent rim of the downstream end of the heater module may be configured to be inserted into the heater downstream connection recess of the flexible downstream connection element.
[0011] This may provide a reliable connection between the downstream end of the heater module and the flexible downstream connection element. This may provide a
[0012] flexible connection between the downstream end of the heater module and the flexible downstream connection element. This may provide an airtight connection between the downstream end of the heater module and the flexible downstream connection element.
[0013] The heater module may have a tubular form. The bent rim of the downstream end of the heater module may circumferentially extend around the tubular-shaped heater module. The heater downstream connection recess of the flexible downstream connection element may circumferentially extend through the flexible downstream connection element.
[0014] This may provide a tubular heater module which may be configured to receive an aerosol-generating article which is also tubular or which is formed as a rod. The aerosol-generating article may have the overall shape of a cigarette.
[0015] The flexible downstream connection element may comprise a downstream ring-shaped part and a downstream connecting part. The downstream connecting part may circumferentially surround the downstream ring-shaped part of the flexible downstream connection element. The downstream connecting part may be located adjacent to the downstream ring-shaped part in the flexible downstream connection element. The downstream connecting part may be in direct contact with the downstream ring-shaped part in the flexible downstream connection element. The flexible downstream connection element may be formed as a monolithic one-piece member.
[0016] The downstream ring-shaped part of the flexible downstream connection element may be configured to provide a sealing connection between the heater module and the heater casing downstream part. The downstream connecting part of the flexible downstream connection element may be configured to provide a flexible connection between the heater module and heater casing downstream part. The flexible downstream connection element may be configured to provide a connection and a sealing between the heater module and heater casing downstream part.
[0017] The downstream ring-shaped part of the flexible downstream connection element may be circular-shaped. This may provide a sealing connection between a heater module having a ring-shaped cross-section along a plane perpendicular to a longitudinal axis of the aerosol-generating device and the heater casing downstream part having the same ring-shaped cross-section. The downstream ring-shaped part of the flexible downstream connection element may be oval-shaped. This may provide a sealing connection between a heater module with an oval cross-section perpendicular to a longitudinal axis of the heater module and a heater casing downstream part with an oval cross-section.
[0018] The heater casing downstream part may comprise a downstream connection profile. The downstream connection profile may be configured for engaging with the downstream connecting part of the flexible downstream connection element. The downstream connection profile of the heater casing downstream part may be located at the upstream end of the heater casing downstream part.
[0019] The downstream connecting part of the flexible downstream connection element may be configured for providing a connection to the heater casing downstream part. The downstream ring-shaped part of the flexible downstream connection element may be configured for sealing an airflow channel between the heater module and the heater casing downstream part. The flexible downstream connection element may be configured to provide both a connection between the heater module and heater casing downstream part and sealing an airflow channel between the heater module and heater casing downstream part.
[0020] The aerosol-generating device may comprise a longitudinal axis. The downstream connecting part of the flexible downstream connection element may have a hook-shaped cross section in a plane parallel to the longitudinal axis of the aerosol-generating device. Such a hook-shaped cross section of the downstream connecting part may be configured to provide a reliable and flexible connection with the heater casing downstream part.
[0021] The downstream connection profile of the heater casing downstream part may comprise a connection recess and a connection protrusion. The connection recess and the connection protrusion may be configured for engaging with the downstream connecting part of the flexible downstream connection element. In particular, the connection recess and the connection protrusion of the downstream connection profile of the heater casing downstream part may be configured to engage with the hook-shaped cross section of the downstream connecting part of the flexible downstream connection element.
[0022] This may provide a secure and reliable, but also flexible connection between the heater casing downstream part and the flexible downstream connection element.
[0023] The downstream connecting part of the flexible downstream connection element may at least partly extend along the longitudinal axis of the aerosol-generating device. A downstream connection protrusion of the downstream connecting part may at least partly extend along the longitudinal axis of the aerosol-generating device.
[0024] This may provide a secure and reliable connection between the flexible downstream connection element and the heater casing downstream part.
[0025] The heater casing downstream part may comprise a tubular downstream part configured for at least partly receiving an aerosol-generating article. The tubular downstream part of the heater casing downstream part may at least partly circumscribe an airflow channel through heater casing downstream part. The downstream ring-shaped part of the flexible downstream connection element may be in contact with the tubular downstream part of the heater casing downstream part. The downstream ring-shaped part of the flexible downstream connection element may be in contact with the heater module. Preferably, the downstream ring-shaped part of the flexible downstream connection element may be sealingly connected with the heater module and the tubular downstream part. This may provide a sealing connection between the heater module and an air flow channel extending through the heater casing downstream part. This may provide a sealing connection between the heating cavity which is at least partly circumscribed by the heater module and an airflow channel extending through the heater casing downstream part.
[0026] The heater module may comprise an upstream end. The flexible upstream connection element may comprise a heater upstream connection recess. The heater upstream connection recess may be configured for engaging with the upstream end of the heater module. In particular, the upstream end of the heater module may be configured to be inserted into the heater upstream connection recess. The upstream end of the heater module may comprise an upstream bent rim. The upstream bent rim of the upstream end of the heater module may be configured to be inserted into the heater upstream connection recess of the flexible upstream connection element.
[0027] This may provide a reliable connection between the upstream end of the heater module and the flexible upstream connection element. This may provide a flexible connection between the upstream end of the heater module and the flexible upstream connection element. This may provide an airtight connection between the upstream end of the heater module and the flexible upstream connection element.
[0028] The flexible upstream connection element may comprise an upstream ring-shaped part and an upstream connecting part. The upstream connecting part may circumferentially surround the upstream ring-shaped part. The upstream connecting part may be located adjacent to the upstream ring-shaped part in the flexible upstream connection element. The upstream connecting part may be in direct contact with the upstream ring-shaped part in the flexible upstream connection element. The flexible upstream connection element may be a monolithic connection element formed as a one-piece member.
[0029] The upstream ring-shaped part of the flexible upstream connection element may be configured to provide a sealing connection between the heater module and the heater casing upstream part. The upstream connecting part of the flexible upstream connection element may be configured to provide a flexible connection between the heater module and heater casing upstream part. The flexible upstream connection element may be configured to provide a connection and a sealing between the heater module and heater casing upstream part.
[0030] The heater casing upstream part may comprise an upstream connection profile. The upstream connection profile may be configured for engaging with the upstream connecting part of the flexible upstream connection element.
[0031] The upstream connecting part of the flexible upstream connection element may be configured for providing a connection to the heater casing upstream part. The upstream ring-shaped part of the flexible upstream connection element may be configured for sealing an airflow channel between the heater module and the heater casing upstream part. The flexible upstream connection element may be configured to provide both a connection between the heater module and heater casing upstream part and sealing an airflow channel between the heater module and heater casing upstream part.
[0032] The upstream ring-shaped part of the flexible upstream connection element may be circular-shaped. This may provide a sealing connection between a heater module with a ring-shaped cross-section in a plane perpendicular to a longitudinal axis of the aerosol-generating device and the heater casing upstream part having the same cross-section. The upstream ring-shaped part of the flexible upstream connection element may be oval-shaped. This may provide a sealing connection between a heater module with an oval cross-section perpendicular to a longitudinal axis of the heater module and a heater casing upstream part with an oval cross-section.
[0033] The aerosol-generating device may comprise a longitudinal axis. The upstream connecting part of the flexible upstream connection element may extend partly along the longitudinal axis of the aerosol-generating device. Preferably, the upstream connecting part may form an upstream protrusion. The upstream protrusion may at least partly extend along the longitudinal axis of the aerosol-generating device.
[0034] The upstream protrusion may provide a flexible connection between the flexible upstream connection element and the heater casing upstream part.
[0035] The upstream connection profile of the heater casing upstream part may comprise an upstream connection recess. The upstream connection recess may be configured for engaging with the upstream connecting part of the flexible upstream connection element. Preferably, the upstream connection recess may be configured for engaging with the upstream protrusion. The upstream connection profile may be located at a downstream end of the heater casing upstream part.
[0036] This may provide a reliable, secure and flexible connection between the heater casing upstream part and the flexible upstream connection element.
[0037] The heater casing upstream part may comprise a tubular upstream part. The upstream ring-shaped part of the flexible upstream connection element may be configured for providing a sealing connection to the tubular upstream part of the heater casing upstream part. The upstream ring-shaped part of the flexible upstream connection element may be configured to be in contact with the heater module and the tubular upstream part of the heater casing upstream part. Preferably, the upstream ring-shaped part of the flexible upstream connection element may be sealingly connected with the heater module and the tubular upstream part of the heater casing upstream part.
[0038] This may provide a sealing connection between an airflow channel extending through the heater casing upstream part and the heater module.
[0039] The flexible upstream connection element may be configured to allow a relative movement of the heater module in relation to the heater casing upstream part. The flexible downstream connection element may be configured to allow a relative movement of the heater module in relation to the heater casing downstream part.
[0040] This may allow the correct assembly of the heater casing housing the heater module despite manufacturing tolerances between heater module and one or both of the heater casing downstream part and the heater casing upstream part.
[0041] The heater module may comprise a tubular heat conductive element. The tubular heat conductive element may at least partially circumscribe a heating chamber. The heating chamber may be configured for receiving an aerosol-generating article. The heating chamber may be configured for heating an aerosol-generating article received in the heating chamber. The tubular heat conductive element may comprise a material selected from a group consisting of a metal, and a heat conductive ceramic. Preferably, the heat conductive element comprises a metal tube.
[0042] The heat conductive element may be connected to heating wires. The heating wires may transfer heat to the heat conductive element.
[0043] The heater casing upstream part may comprise an air-flow tube. The air-flow tube may be configured for providing air to the heater module. The air-flow tube may at least partially circumscribe the airflow channel for providing air to the heater module. The airflow tube may comprise an upstream end. Air may enter the air flow tube through the upstream end of the airflow tube to be further directed to the heater module.
[0044] One or both of the flexible upstream connection element and the flexible downstream connection element may be formed from a flexible material. The flexible material may comprise or may be formed from materials such as rubber or an elastomer. Preferably, one or both of flexible upstream connection element and the flexible downstream connection element may be formed from silicone rubber.
[0045] Rubber and an elastomer are particularly flexible materials which can be compressed and bend in order adjust for manufacturing tolerances between the heater casing downstream part, the heater casing upstream part and the heater module.
[0046] One or both of the flexible upstream connection element and the flexible downstream connection element may be configured to be bendable and compressible. This may provide a particular flexible and reliable connection. This may ensure that any manufacturing tolerances between the heater module and the heater casing upstream part or the heater module and the heater casing downstream part can be adjusted.
[0047] The material of one or both of the flexible upstream connection element and the flexible downstream connection element may comprise a heat stabilizer. The heat stabilizer may be configured to increase the heat resistance of the material of one or both of the flexible upstream connection element and the flexible downstream connection element. The heat stabilizer may be configured to confer a heat resistance to one or both of the flexible upstream connection element and the flexible downstream connection element of up to 270 degrees Celsius. The heat stabilizer may comprise a filler. The heat stabilizer may comprise a filler such as titanium dioxide or ferric oxide. This may allow one or both of the flexible upstream connection element and the flexible downstream connection element to withstand the high temperatures of the heater module during operation of the aerosol-generating device. This may allow one or both of the flexible upstream connection element and the flexible downstream connection element to be located adjacent to the heater module in the aerosol-generating device.
[0048] One or both of the flexible upstream connection element and the flexible downstream connection element may be in direct contact with the heater module. The heater module may comprise a heating element. The heating element may at least partially circumscribe a heating chamber. The heating chamber may be located within the heater casing. The heating chamber may be configured for receiving an aerosol-generating article. One or both of the flexible upstream connection element and the flexible downstream connection element may be in direct contact with the heating element of the heater module.
[0049] The heating chamber may be configured for receiving an aerosol-generating article comprising an aerosol-forming substrate. The heating chamber may comprise a cavity into which the aerosol-generating article is inserted. The cavity may be tubular. The cavity may include a thermally conductive material. The cavity may comprise a tube, in particular a tubular heat conductive element. The tubular heat conductive element may comprise a metal tube or a ceramic tube.
[0050] The heating chamber may comprise an opening at the downstream end of the heating chamber for receiving the aerosol-generating article. The opening may also serve as an air outlet.
[0051] The heating chamber may comprise a heating element configured for heating the aerosol-generating article. The heating element may comprise a substrate layer of flexible material. The substrate layer may comprise a thermally stable polymer, preferably polyimide.
[0052] The heating element may be arranged on the substrate layer. The heating element may be a resistive heating element. The heating element may contain wire connections configured for being connected with the control element. The wire connections may comprise the heating wires. The heating element may comprise heating tracks arranged on the substrate layer. The heating tracks may comprise a thermally conductive material, preferably metals, such as stainless steel. The heating tracks may be electrically connected to said wire connections.
[0053] In particular, the heating chamber may comprise a tube made of metal wrapped into said substrate layer of flexible material, wherein the heating elements are arranged on the substrate layer.
[0054] The portion of the heating element, which is in contact with the aerosol-forming substrate is heated as a result of the electrical current passing through the heating element. The current is supplied by a power source. In one embodiment, this portion of the heating element is configured to reach a temperature of between about 140 degrees Celsius and about 270 degrees Celsius in use. Preferably, the heating element is configured to reach a temperature of between about 180 degrees Celsius and about 240 degrees Celsius.
[0055] The heating chamber configured for receiving the aerosol-forming article may be housed in the heater casing and may be spaced apart from the inner walls of the heater casing. This may provide thermal insulation between the inner walls of the heater casing and the heating chamber in which heat is generated. The space between the inner walls of the heater casing and the heating chamber may be airtight. The space may be filled with air. The space may also be filled with a gaseous mixture, preferably an inert gas such as nitrogen. This may provide a particularly good insulation between the inner walls of the heater casing and the heating chamber.
[0056] The tube may comprise an upstream end and a downstream end. The flexible upstream connection element may circumferentially surround the upstream end of the tube of the heater module. The flexible upstream connection element may be in direct contact with the upstream end of the tube of the heater module. The flexible upstream connection element may circumferentially surround the upstream end of the tube of the heater module and may be in direct contact with the upstream end of the heater module. The flexible downstream connection element may circumferentially surround the downstream end of the tube of the heater module. The flexible downstream connection element may be in direct contact with the downstream end of tube of the heater module. The flexible downstream connection element may circumferentially surround the downstream end of the tube of the heater module and may be in direct contact with the downstream end of the heater module. During operation of the aerosol-generating device a temperature of the tube may be increased. This may allow aerosol generation from the aerosol-generating article inserted into the cavity.
[0057] The heat stabilizer may increase the heat resistance of one or both the flexible upstream connection element and the flexible downstream connection element. This may allow one or both of the flexible upstream connection element and the flexible downstream connection element to be located adjacent to the heating element in the heater module. This may allow one or both of the flexible upstream connection element and the flexible downstream connection element to be in direct contact with the heating element in the heater module. As used herein, the term “heat stabilizer” refers to a chemical compound which can increase the heat resistance of the material of one or both of the flexible upstream connection element and the flexible downstream connection element in comparison to a material lacking the heat stabilizer. In particular, the heat stabilizer may decrease any thermal degradation of the material of one or both of the flexible upstream connection element and the flexible downstream connection element in comparison to the material lacking the heat stabilizer.
[0058] One or both of the flexible upstream connection element and the flexible downstream connection element may be formed of a material comprising from 1.5 weight percent to 4 weight percent, preferably from 2 weight percent to 3 weight percent of the heat stabilizer based on the total weight of one or both of the flexible upstream connection element and the flexible downstream connection element.
[0059] Resistance of in particular a rubber, such as a silicone rubber to heat may be increased by increasing the curing time of the rubber. In particular, the rubber may be cured for a time period of between 5 hours to 7 hours, preferably 5.5 hours 6.5 hours. The rubber may be cured at a temperature of 210 degrees Celsius to 270 degrees Celsius. This may increase cross-linking between the different polymeric molecules in the rubber, in particular the silicone rubber.
[0060] The aerosol-generating device may furthermore comprise a control element. The control element may be configured for controlling operation of the aerosol-generating device.
[0061] The heater module of the aerosol-generating device may further comprise electrical connections for connection to the control element. Preferably, the heater casing upstream part may comprise holes for directing the electrical connections through the heater casing upstream part. The heater module of the aerosol-generating device may furthermore comprise wire connections. These wire connections may be configured to heat a heating element of the module.
[0062] The heater casing, the air-flow tube of the heater casing upstream part and the control element may be mounted one another in order to form a self-supporting component of the aerosol-generating device.
[0063] The self-supporting component may simplify the assembly of the aerosol-generating device. The self-supporting component may support itself and its own weight without the necessity for an external frame for arranging the heater casing, the air-flow tube and the control element relative to each other. The heater casing, the air-flow tube and the control element may hold each other in position. The self-supporting component may form a separate unit of the aerosol-generating device. The self-supporting component may form an internal component of the aerosol-forming device. The internal component of the aerosol-forming device may be partly located within an outer casing of the aerosol-generating device.
[0064] The self-supporting component may preferably be completely housed within the outer casing of the aerosol-generating device.
[0065] The heater casing downstream part and the heater casing upstream part may be configured to be connected to each other. The heater casing downstream part and the heater casing upstream part may be configured to be connected directly to each other. The heater casing downstream part and the heater casing upstream part may directly contact each other in the aerosol-generating device. The heater casing may be formed upon connecting the heater casing downstream part to the heater casing upstream part.
[0066] One or both of the heater casing upstream part and the heater casing downstream part may comprise connections. The connections may be configured for mounting the heater casing downstream part to the heater casing upstream part. This may block a position of the heater module relative to the heater casing upstream part and the heater casing downstream part. The connections may comprise holes in both of the heater casing upstream part and the heater casing downstream part. A connection element may be positioned in both the holes of the heater casing upstream part and the heater casing downstream part for locking both parts together. This also may block a further movement of the heater module inside of the heater casing relative to the heater casing downstream part and the heater casing upstream part. The connection elements may for example comprise screws which may be configured for screwing together the heater casing downstream part to the heater casing upstream part. One or both of the holes in the heater casing upstream part and the heater casing downstream part may comprise threads for accommodating the connection elements, in particular the screws.
[0067] The heater casing may comprise a downstream heater opening for inserting the aerosol-generating article into the heating chamber. The downstream heater opening may be located at the downstream end of the airflow path through the aerosol-generating device.
[0068] The aerosol-generating device may furthermore comprise a control element. The control element may be configured for controlling the operation of the aerosol-generating device. The control element may comprise a substrate, for example a printed circuit board. Control circuitry may be mounted on the substrate. The control circuitry may be configured for controlling operation of the aerosol-generating device.
[0069] The heating element of the heater module may comprise electrical connections for connection to the control element. In particular, the heater casing upstream part may comprise through holes for directing the electrical connections through the heater casing upstream part.
[0070] This may provide an easy way of directing the electrical connections through the heater casing upstream part to the control element. The control element may be located adjacent to the heater casing upstream part in the aerosol-generating device.
[0071] According to another embodiment of the invention there is provided a method for assembling an aerosol-generating device. The method may comprise the method step of providing a heater module. The method may comprise the method step of providing a heater casing upstream part and a heater casing downstream part for assembly of the heater casing. The heater casing may house the heater module. The method may comprise the method step of providing a flexible downstream connection element. The flexible downstream connection element may be configured for engaging with the heater casing downstream part and the heater module. The method may comprise the method step of providing a flexible upstream connection element. The flexible upstream connection element may be configured for engaging with the heater casing upstream part and the heater module. The method may comprise the method step of engaging the flexible downstream connection element with the heater casing downstream part. The method for assembling the aerosol-generating device may comprise the method step of engaging the flexible upstream connection element with the heater casing upstream part. The method may comprise the method step of positioning the heater module between the flexible upstream connection element and the flexible downstream connection element. The positioning of the heater module relative to the heater casing upstream part may be done by one or both of compressing and bending the flexible upstream connection element. The positioning of the heater module relative to the heater casing downstream part may be done by one or both of compressing and bending the flexible downstream connection element. The method may comprise the method step of connecting the heater casing downstream part to the heater casing upstream part to form the heater casing housing the heater module.
[0072] Another embodiment of the invention provides a method for assembling an aerosol-generating device. The method comprises the method steps of providing a heater module, providing a heater casing upstream part and a heater casing downstream part for assembly of a heater casing, wherein the heater casing houses the heater module. The method furthermore comprises the method step of providing a flexible downstream connection element, the flexible downstream connection element being configured for engaging with the heater casing downstream part and the heater module. The method furthermore provides a flexible upstream connection element, the flexible upstream connection element being configured for engaging with the heater casing upstream part and the heater module. The method for assembling an aerosol-generating device furthermore comprises the method step of engaging the flexible downstream connection element with the heater casing downstream part and engaging the flexible upstream connection element with the heater casing upstream part. Positioning of the heater module between the flexible upstream connection element and the flexible downstream connection element is performed, wherein the positioning of the heater module relative to the heater casing upstream part is done by one or both of compressing and bending the flexible upstream connection element. Positioning of the heater module relative to the heater casing downstream part is done by one or both of compressing and bending the flexible downstream connection element. The method also comprises the method step of connecting the heater casing downstream part to the heater casing upstream part to form the heater casing, wherein the heater casing houses the heater module.
[0073] The method for assembling the aerosol-generating device may provide an easy method to adjust for manufacturing tolerances between the heater casing upstream part and the heater module and the heater casing downstream part and the heater module. The method for assembling the aerosol-generating device may be an easy method for assembling an aerosol-generating device with an airtight airflow channel extending from the heater casing upstream part through the heater module to the heater casing downstream part.
[0074] A flexible downstream connection element may be provided, wherein the downstream connection element comprises a downstream ring-shaped part and a downstream connecting part. The heater casing downstream part may comprise a downstream connection profile. The flexible downstream connection element may be engaged with the heater casing downstream part by securing the downstream connecting part of the downstream connection element with the downstream connection profile of the heater casing downstream part.
[0075] A flexible upstream connection element may be provided. The flexible upstream connection element may comprise an upstream ring-shaped part and an upstream connecting part. The heater casing upstream part may comprise an upstream connection profile. The flexible upstream connection element may be engaged with the heater casing upstream part by securing the upstream connecting part of the upstream connection element with the upstream connection profile of the heater casing upstream part.
[0076] The method for assembling the aerosol-generating device may include all the further features, which were already discussed above in relation the aerosol-generating device itself.
[0077] The present invention further relates to an aerosol-generating system comprising the aerosol-generating device described herein and an aerosol-generating article. The aerosol-generating article comprises the aerosol-forming substrate. The aerosol-generating device is configured to receive the aerosol-generating article. The aerosol-generating article may comprise a heater. The heater may comprise a susceptor element and the heater module of the aerosol-generating device may comprise an inductor. The inductor may be configured controllable by the control element to control the temperature of the susceptor element. The aerosol-generating article and device are preferably configured such that when the article is received by the device, the inductor and susceptor are positioned relative to each other so that the provision of power from the power supply to the inductor induces eddy currents into the susceptor, thereby causing heating of the aerosol-forming substrate.
[0078] The heater module of the aerosol-generating device may comprise a resistive heating element.
[0079] As used herein, the term “aerosol-generating article” refers to an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol. For example, an aerosol-generating article may be a smoking article that generates an aerosol that is directly inhalable into a user’s lungs through the user's mouth. An aerosol-generating article may be disposable.
[0080] As used herein, an ‘aerosol-generating device’ relates to a device that interacts with an aerosol-forming substrate to generate an aerosol. The aerosol-forming substrate may be part of an aerosol-generating article, for example part of a smoking article. An aerosol-generating device may be a smoking device that interacts with an aerosol-forming substrate of an aerosol-generating article to generate an aerosol that is directly inhalable into a user’s lungs thorough the user's mouth. An aerosol-generating device may be a holder. The device is preferably a portable or handheld device that is comfortable to hold between the fingers of a single hand.
[0081] As used herein, the term “aerosol-forming substrate” refers to a substrate capable of releasing volatile compounds that can form an aerosol. The volatile compounds may be released by heating or combusting the aerosol-forming substrate. The aerosol-forming substrate may be solid or liquid or may comprise both solid and liquid components. An aerosol-forming substrate may be part of an aerosol-generating article. The terms ‘aerosol’a nd ‘vapor’ are used synonymously. In particular, the aerosol-forming substrate may generate an aerosol if heated to a temperature below the combustion temperature of the aerosol-forming substrate.
[0082] As used herein, a ‘susceptor’ or ‘susceptor element’ means an element that heats up when subjected to an alternating magnetic field. This may be the result of eddy currents induced in the susceptor element, hysteresis losses, or both eddy currents and hysteresis losses. During use, the susceptor element is located in thermal contact or close thermal proximity with an aerosol-forming substrate received in the aerosol-generating article or cartridge. In this manner, the aerosol-forming substrate is heated by the susceptor such that an aerosol is formed.
[0083] The aerosol-forming substrate may comprise nicotine. The nicotine-containing aerosol-forming substrate may be a nicotine salt matrix.
[0084] The aerosol-forming substrate may comprise plant-based material. The aerosol-forming substrate may comprise tobacco. The aerosol-forming substrate may comprise a tobacco-containing material including volatile tobacco flavour compounds which are released from the aerosol-forming substrate upon heating. Alternatively, the aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may comprise homogenised plant-based material. The aerosol-forming substrate may comprise homogenised tobacco material. Homogenised tobacco material may be formed by agglomerating particulate tobacco.
[0085] The aerosol-forming substrate may comprise at least one aerosol-former. An aerosol-former is any suitable known compound or mixture of compounds that, in use, facilitates formation of a dense and stable aerosol and that is substantially resistant to thermal degradation at the temperature of operation of the aerosol-generating system. Suitable aerosol-formers are well known in the art and include, but are not limited to: polyhydric alcohols, such as triethylene glycol, 1, 3-butanediol and glycerine; esters of polyhydric alcohols, such as glycerol mono-, di-or triacetate; and aliphatic esters of mono-, di-or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers are polyhydric alcohols or mixtures thereof, such as triethylene glycol, 1, 3-butanediol. Preferably, the aerosol former is glycerine. Where present, the homogenised tobacco material may have an aerosol-former content of equal to or greater than 5 percent by weight on a dry weight basis, and preferably from 5 percent to 30 percent by weight on a dry weight basis. The aerosol-forming substrate may comprise other additives and ingredients, such as flavourants.
[0086] The aerosol-generating device may comprise a housing. The housing may include a user interface to activate the aerosol-generating device, for example a button to initiate heating of the aerosol-generating device or a display to indicate a state of the aerosol-generating device or of the aerosol-forming substrate. The housing may be formed by the outer casing of the aerosol-generating device which accommodates the internal component of the aerosol-generating device.
[0087] The rechargeable power supply of one or both of the charger and the aerosol-generating device may be a direct current (DC) power supply. In one embodiment, the rechargeable power supply is a DC power supply having a DC supply voltage in the range of 2.5 Volts to 4.5 Volts and a DC supply current in the range of 1 Amp to 10 Amps (corresponding to a DC power supply in the range of 2.5 Watts to 45 Watts) . The aerosol-generating device may advantageously comprise a direct current to alternating current (DC / AC) inverter for converting a DC current supplied by the DC power supply to an alternating current. The DC / AC converter may comprise a Class-D, Class-C or Class-E power amplifier. The AC power output of the DC / AC converter is supplied to the induction coil.
[0088] Below, there is provided a non-exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.
[0089] Example Ex1: Aerosol-generating device comprising:
[0090] a heater module, and
[0091] a heater casing comprising:
[0092] a heater casing downstream part,
[0093] a heater casing upstream part,
[0094] a flexible upstream connection element, and
[0095] a flexible downstream connection element,
[0096] wherein the heater casing houses the heater module, and wherein the heater module is mounted in the heater casing between the flexible upstream connection element and the flexible downstream connection element.
[0097] Example Ex2: The aerosol-generating device according to the preceding example, wherein the heater module comprises a downstream end and wherein the flexible downstream connection element comprises a heater downstream connection recess, the heater downstream connection recess being configured for engaging with the downstream end of the heater module.
[0098] Example Ex3: The aerosol-generating device according to any of the preceding examples, wherein the flexible downstream connection element comprises a downstream ring-shaped part and a downstream connecting part, the downstream connecting part circumferentially surrounding the downstream ring-shaped part, wherein the heater casing downstream part comprises a downstream connection profile, the downstream connection profile being configured for engaging with the downstream connecting part of the flexible downstream connection element.
[0099] Example Ex4: The aerosol-generating device according to the preceding example, wherein the aerosol-generating device comprises a longitudinal axis and wherein the downstream connecting part of the flexible downstream connection element has a hooked-shaped cross-section in a plane parallel to the longitudinal axis of the aerosol-generating device.
[0100] Example Ex5: The aerosol-generating device according to any of the preceding examples Ex3 or Ex4, wherein the downstream connection profile of the heater casing downstream part comprises a connection recess and a connection protrusion, the connection recess and connection protrusion being configured for engaging with the downstream connecting part of the flexible downstream connection element.
[0101] Example Ex6: The aerosol-generating device according to any of the preceding examples Ex3 to Ex5, wherein the downstream connecting part of the flexible downstream connection element at least partly extends along a longitudinal axis of the aerosol-generating device.
[0102] Example Ex7: The aerosol-generating device according to any of the preceding examples Ex3 to Ex5, wherein the heater casing downstream part comprises a tubular downstream part configured for at least partly receiving an aerosol-generating article and wherein the downstream ring-shaped part of the flexible downstream connection element is in contact with the heater module and the tubular downstream part, preferably wherein the downstream ring-shaped part of the flexible downstream connection element is sealingly connected with the heater module and the tubular downstream part.
[0103] Example Ex8: The aerosol-generating device according to any of the preceding examples, wherein the heater module comprises an upstream end and wherein the flexible upstream connection element comprises a heater upstream connection recess, the heater upstream connection recess being configured for engaging with the upstream end of the heater module.
[0104] Example Ex9: The aerosol-generating device according to any of the preceding examples, wherein the flexible upstream connection element comprises an upstream ring-shaped part and an upstream connecting part, the upstream connecting part circumferentially surrounding the upstream ring-shaped part, wherein the heater casing upstream part comprises an upstream connection profile, the upstream connection profile being configured for engaging with the upstream connecting part of the flexible upstream connection element.
[0105] Example Ex10: The aerosol-generating device according to the preceding example, wherein the aerosol-generating device comprises a longitudinal axis and wherein the upstream connecting part of the flexible upstream connection element extends partly along the longitudinal axis of the aerosol-generating device, preferably wherein the upstream connecting part forms a upstream protrusion.
[0106] Example Ex11: The aerosol-generating device according to any of the preceding examples Ex9 or Ex10, wherein the upstream connection profile of the heater casing upstream part comprises an upstream connection recess, the upstream connection recess being configured for engaging with the upstream connecting part of the flexible upstream connection element, preferably wherein the upstream connection recess is configured for engaging with the upstream protrusion.
[0107] Example Ex12: The aerosol-generating device according to any of the preceding examples Ex9 to Ex11, wherein the heater casing upstream part comprises a tubular upstream part and wherein the upstream ring-shaped part of the flexible upstream connection element is in contact with the heater module and the tubular upstream part, preferably wherein the upstream ring-shaped part of the flexible upstream connection element is sealingly connected with the heater module and the tubular upstream part.
[0108] Example Ex13: The aerosol-generating device according to any of the preceding examples, wherein one or both the flexible upstream connection element is configured to allow a relative movement of the heater module in relation to the heater casing upstream part and the flexible downstream connection element is configured to allow a relative movement of the heater module in relation to the heater casing downstream part.
[0109] Example Ex14: The aerosol-generating device according to any of the preceding examples, wherein the heater module comprises a tubular heat conductive element, the tubular heat conductive element at least partially circumscribing a heating cavity, preferably wherein the heating cavity is configured for receiving an aerosol-generating article.
[0110] Example Ex15: The aerosol-generating device according to any of the preceding examples, wherein the heater casing upstream part comprises an air-flow tube configured for providing air to the heater module.
[0111] Example Ex16: The aerosol-generating device according to any of the preceding examples, wherein one or both the flexible upstream connection element and the flexible downstream connection element are formed of one of rubber or an elastomer, preferably silicon rubber.
[0112] Example Ex17: The aerosol-generating device according to any of the preceding examples, further comprising a control element configured for controlling operation of the aerosol-generating device.
[0113] Example Ex18: The aerosol-generating device according to the preceding example, wherein the heating module further comprises electrical connections for connection to the control element, preferably wherein the heater casing upstream part comprises through holes for directing the electrical connection through the heater casing upstream part.
[0114] Example Ex19: The aerosol-generating device according to examples Ex17 and Ex18, wherein the heater casing, the air-flow tube and the control element are mounted to one another to form a self-supporting component of the aerosol-generating device.
[0115] Example Ex20: The aerosol-generating device according to the preceding example, further comprising an outer casing, wherein the self-supporting component is at least partly housed within the outer casing.
[0116] Example Ex21: Method for assembling an aerosol-generating device, comprising the method steps of:
[0117] - providing a heater module,
[0118] - providing a heater casing upstream part and a heater casing downstream part for assembly of a heater casing, the heater casing housing the heater module,
[0119] - providing a flexible downstream connection element, the flexible downstream connection element being configured for engaging with the heater casing downstream part and the heater module,
[0120] - providing a flexible upstream connection element, the flexible upstream connection element being configured for engaging with the heater casing upstream part and the heater module,
[0121] - engaging the flexible downstream connection element with the heater casing downstream part and engaging the flexible upstream connection element with the heater casing upstream part,
[0122] - positioning the heater module between the flexible upstream connection element and the flexible downstream connection element,
[0123] - positioning the heater module relative to the heater casing upstream part by one or both of compressing and bending the flexible upstream connection element,
[0124] - positioning the heater module relative to the heater casing downstream part by one or both of compressing and bending the flexible downstream connection element,
[0125] - connecting the heater casing downstream part to the heater casing upstream part to form the heater casing housing the heater module.
[0126] Example Ex22: The method according to the preceding example, wherein a flexible downstream connection element is provided, wherein the downstream connection element comprises a downstream ring-shaped part and a downstream connecting part, wherein the heater casing downstream part comprises a downstream connection profile, and wherein the flexible downstream connection element is engaged with the heater casing downstream part by securing the downstream connecting part of the downstream connection element with the downstream connection profile of the heater casing downstream part.
[0127] Example Ex23: The method according to any of the preceding examples Ex21 or Ex22, wherein a flexible upstream connection element is provided, wherein the upstream connection element comprises an upstream ring-shaped part and an upstream connecting part, wherein the heater casing upstream part comprises an upstream connection profile, and wherein the flexible upstream connection element is engaged with the heater casing upstream part by securing the upstream connecting part of the upstream connection element with the upstream connection profile of the heater casing downstream part.
[0128] Features described in relation to one embodiment may equally be applied to other embodiments of the invention.
[0129] In the following elements with the same functionality are marked with the same reference numerals throughout all the figures.
[0130] The invention will be further described, by way of example only, with reference to the accompanying drawings in which:
[0131] Fig. 1 shows a schematic perspective view of the internal components of an aerosol-generating device with a heater module arranged between a flexible downstream connection element and a flexible upstream connection element;
[0132] Fig. 2 shows a schematic perspective view of one embodiment of a flexible downstream connection element;
[0133] Fig. 3A and 3B depict different schematic perspective views of one embodiment of a flexible upstream connection element;
[0134] Fig. 4 shows a schematic perspective cross-sectional view of the arrangement of the heater module located between the flexible downstream connection element and the flexible upstream connection element, wherein the connection elements are further connected to the heater casing downstream part and the heater casing upstream part;
[0135] Fig. 5 depicts a cross-sectional perspective view through an area in the aerosol-generating device where the flexible downstream connection element makes contact with the heater module and the heater casing downstream part;
[0136] Fig. 6 shows a cross-sectional perspective view through an area in the aerosol-generating device where the flexible upstream connection element makes contact with the heater module and heater casing upstream part;
[0137] Fig. 7 depicts a perspective view of the flexible upstream connection element being connected to a tubular part of the heater casing upstream part; and
[0138] Fig. 8 shows a perspective view of an aerosol-generating device wherein the heater casing is mounted to a control element, further including a power source.
[0139] Figure 1 shows a schematic perspective view of the internal components of an aerosol-generating device 10. These internal components include a heater casing downstream part 18 and a heater casing upstream part 12 (heater casing upstream part 12 only partially shown in figure 1) . A heater module 16 is present, which is arranged between a flexible downstream connection element 14 and a flexible upstream connection element 24. The flexible downstream connection element 14 enables a flexible, but also airtight connection of the heater module 16 to the heater casing downstream part 18. The flexible upstream connection element 24 enables a flexible, but also airtight connection of the heater module 16 to the heater casing upstream part 12. Connection elements 20, such as screws, are present which are configured to connect the heater casing downstream part to the heater casing upstream part, thereby forming the heater casing, wherein the heater casing houses the heater module 16. Heating wires 22 are present which can connect the heater module 16 to a control element (control element not shown in figure 1) and which are configured to transfer the heat to the heating element of the heater module 16. Additionally, a central longitudinal axis 33 is present extending through the internal components of the aerosol-generating device 10. This central longitudinal axis 33 also defines an airflow channel through the various internal components of the aerosol-generating device 10.
[0140] Figure 2 depicts a schematic perspective view of one embodiment of a flexible downstream connection element 14. The flexible downstream connection element 14 comprises a ring-shaped part 14A, which allows a flexible but airtight connection between the heater module and the heater casing downstream part. The ring-shaped part 14A of the flexible downstream connection element 14 is circumferentially surrounded by a downstream connecting part 14B of the flexible downstream connection element 14. This downstream connecting part is configured to engage with the heater casing downstream part. In particular, this downstream connecting part 14B comprises a connection recess 14C and a connection protrusion 14D. The heater downstream connection recess is not shown in this Fig.
[0141] Figure 3A shows a schematic perspective view of one embodiment of a flexible upstream connection element 24. The flexible upstream connection element comprises a ring-shaped part 24A of the flexible upstream connection element 24. This ring-shaped part 24A is circumferentially surrounded by an upstream connecting part 24B which circumferentially surrounds the ring-shaped part 24A. This upstream connecting part 24B is configured to provide a connection to the heater casing upstream part. The ring-shaped part 24A of the flexible upstream connection element 24 is configured to provide a flexible, but also airtight connection between the heater casing upstream part and the heater module. The heater upstream connection recess is not shown in this Fig.
[0142] Figure 3B shows a schematic perspective view of the flexible upstream connection element 24 shown in figure 3A rotated about an axis being perpendicular to the central longitudinal axis 33 of the aerosol-generating device. This figure 3B clearly shows the upstream protrusion of the upstream connecting part 24B which is configured to provide a connection to the heater casing upstream part. Additionally, the ring-shaped part 24A is shown. Figure 4 shows a schematic perspective cross-sectional view of an arrangement of the heater module 16 located between the flexible downstream connection element 18 and the flexible upstream connection element 24 with adjacent regions of the heater casing downstream part and the heater casing upstream part. In particular, heater module 16 comprises a downstream end 16A and an upstream end 16B. The downstream end 16A of the heater module 16 is in sealing contact with the ring-shaped part 14A of the flexible downstream connection element 14. Additionally, the heater casing downstream part 18 includes a downstream connection profile 18B which is configured for engaging with the downstream connecting part 14B of the flexible downstream connection element. This downstream connection profile 18B of the heater casing downstream part also includes a mounting recess and a mounting protrusion for engaging with the recess 14C and the protrusion 14D of the downstream connecting part of the flexible downstream connection element. Furthermore, the ring-shaped part 14A provides a sealing contact between the tubular part 18A of the heater casing downstream part 18 and the heater module 16. The upstream ring-shaped part 24A of the flexible upstream connection element is in contact with the upstream end 16B of the heater module and with the tubular part 12A of the heater casing upstream part. The heater casing upstream part also includes an upstream connection profile 12B which is configured for providing a connection with the upstream connection part 24B of the flexible upstream connection element 24. The upstream connection part 24B includes a protrusion which can engage with a mounting recess of the upstream connection profile 12B of the heater casing upstream part. Owing to the flexible downstream connection element and the flexible upstream connection element, a flexible, but also airtight connection between the heater module 16 and the heater casing downstream part and the heater casing upstream part can be provided. The flexibility of the flexible downstream connection element and the flexible upstream connection element additionally allows the adjustment of any manufacturing tolerances between the heater module on the one side and the heater casing upstream part and heater casing downstream part on the other side. Figure 5 is a more detailed cross-sectional perspective view through an aerosol-generating device wherein the flexible downstream connection element makes contact with the heater module and the heater casing downstream part. The downstream end 16A of the heater module 16 includes a bent rim 16C which circumferentially surrounds the downstream end 16A of the heater module. The heater module 16 can be formed as a heat conductive element, such as a metal tube. The downstream end 16A of such a metal tube can easily be bend to provide the bent rim 16C. This bent rim 16C can be received in a heater downstream connection recess 14E of the flexible downstream connection element. This provides additional flexibility and stability to the connection between the flexible downstream connection element and the downstream end 16A of the heater module. Furthermore, it can be seen, that recess 14C and protrusion 14D of the downstream connecting part of the flexible downstream connection element have a hooked-shaped cross-section in a plane parallel to the longitudinal axis 33 of the aerosol-generating device.
[0143] Figure 6 depicts a schematic, perspective cross-sectional view of the area in the aerosol-generating device, where the flexible upstream connection element contacts the heater module and the heater casing upstream part. The flexible upstream connection element 24 comprises a heater upstream connection recess 24E. In this heater upstream connection recess 24E the bent rim 16E of the upstream end 16B of the heater module can be received. This provides a flexible, but stable connection between the upstream end 16B of the heater module and the flexible upstream connection element. Additionally, the protrusion 24B of the upstream connecting part of the flexible upstream connection element, which at least partly runs parallel to the central longitudinal axis 33 of the aerosol-generating device is shown. Owing to the flexible upstream connection element, an airtight, but flexible connection can be established between the upstream end 16B of the heater module and the tubular part 12A of the heater casing upstream part. Furthermore, manufacturing tolerances between the heater casing upstream part and the heater module can be adjusted by one or both of compressing and bending the flexible upstream connection element during assembly of the aerosol-generating device.
[0144] Figure 7 depicts a schematic, perspective view of the flexible upstream connection element 24 mounted in the tubular part 12A of the heater casing upstream part. Downstream of the flexible upstream connection element, heater module 16 with the heating wires 22 is visible. Fig. 8 depicts the internal components of the aerosol-generating device 10 in an assembled state. These internal components are housed in an outer casing, which is not shown in Fig. 8. The heater casing downstream part 18 is connected to the heater casing upstream part 12 via connection elements 12F, 18F which are held together by screws. Additional connection elements 12G are present in the heater casing upstream part which connect the heater casing to the control element 32. The heater casing and the control element can form a self-supporting internal component. This component can furthermore be connected to a power source 44. The heater module with the flexible upstream connection element and the flexible downstream connection element are housed in the heater casing and are therefore not shown in this Fig 8.
Claims
1.Aerosol-generating device comprising:a heater module, anda heater casing comprising:a heater casing downstream part,a heater casing upstream part,a flexible upstream connection element, anda flexible downstream connection element,wherein the heater casing houses the heater module, and wherein the heater module is mounted in the heater casing between the flexible upstream connection element and the flexible downstream connection element.2.The aerosol-generating device according to the preceding claim, wherein the heater module comprises a downstream end and wherein the flexible downstream connection element comprises a heater downstream connection recess, the heater downstream connection recess being configured for engaging with the downstream end of the heater module.3.The aerosol-generating device according to any of the preceding claims, wherein the flexible downstream connection element comprises a downstream ring-shaped part and a downstream connecting part, the downstream connecting part circumferentially surrounding the downstream ring-shaped part, wherein the heater casing downstream part comprises a downstream connection profile, the downstream connection profile being configured for engaging with the downstream connecting part of the flexible downstream connection element.4.The aerosol-generating device according to the preceding claim, wherein the aerosol-generating device comprises a longitudinal axis and wherein the downstream connecting part of the flexible downstream connection element has a hooked-shaped cross-section in a plane parallel to the longitudinal axis of the aerosol-generating device.5.The aerosol-generating device according to any of the preceding claims 3 or 4, wherein the downstream connection profile of the heater casing downstream part comprises a connection recess and a connection protrusion, the connection recess and connection protrusion being configured for engaging with the downstream connecting part of the flexible downstream connection element.6.The aerosol-generating device according to any of the preceding claims 3 to 5, wherein the downstream connecting part of the flexible downstream connection element at least partly extends along a longitudinal axis of the aerosol-generating device.7.The aerosol-generating device according to any of the preceding claims 3 to 5, wherein the heater casing downstream part comprises a tubular downstream part configured for at least partly receiving an aerosol-generating article and wherein the downstream circular-shaped part of the flexible downstream connection element is in contact with the heater module and the tubular downstream part, preferably wherein the downstream ring-shaped part of the flexible downstream connection element is sealingly connected with the heater module and the tubular downstream part.8.The aerosol-generating device according to any of the preceding claims, wherein the heater module comprises an upstream end and wherein the flexible upstream connection element comprises a heater upstream connection recess, the heater upstream connection recess being configured for engaging with the upstream end of the heater module.9.The aerosol-generating device according to any of the preceding claims, wherein the flexible upstream connection element comprises an upstream ring-shaped part and an upstream connecting part, the upstream connecting part circumferentially surrounding the upstream ring-shaped part, wherein the heater casing upstream part comprises an upstream connection profile, the upstream connection profile being configured for engaging with the upstream connecting part of the flexible upstream connection element.10.The aerosol-generating device according to the preceding claim, wherein the aerosol-generating device comprises a longitudinal axis and wherein the upstream connecting part of the flexible upstream connection element extends partly along the longitudinal axis of the aerosol-generating device, preferably wherein the upstream connecting part forms a upstream protrusion.11.The aerosol-generating device according to any of the preceding claims 9 or 10, wherein the upstream connection profile of the heater casing upstream part comprises an upstream connection recess, the upstream connection recess being configured for engaging with the upstream connecting part of the flexible upstream connection element, preferably wherein the upstream connection recess is configured for engaging with the upstream protrusion.12.The aerosol-generating device according to any of the preceding claims, wherein one or both the flexible upstream connection element and the flexible downstream connection element are formed of one of rubber or an elastomer, preferably silicon rubber.13.Method for assembling an aerosol-generating device, comprising the method steps of:- providing a heater module,- providing a heater casing upstream part and a heater casing downstream part for assembly of a heater casing, the heater casing housing the heater module,- providing a flexible downstream connection element, the flexible downstream connection element being configured for engaging with the heater casing downstream part and the heater module,- providing a flexible upstream connection element, the flexible upstream connection element being configured for engaging with the heater casing upstream part and the heater module,- engaging the flexible downstream connection element with the heater casing downstream part and engaging the flexible upstream connection element with the heater casing upstream part,- positioning the heater module between the flexible upstream connection element and the flexible downstream connection element,- positioning the heater module relative to the heater casing upstream part by one or both of compressing and bending the flexible upstream connection element,- positioning the heater module relative to the heater casing downstream part by one or both of compressing and bending the flexible downstream connection element,- connecting the heater casing downstream part to the heater casing upstream part to form the heater casing housing the heater module.14.The method according to the preceding claim, wherein a flexible downstream connection element is provided, wherein the downstream connection element comprises a downstream ring-shaped part and a downstream connecting part, wherein the heater casing downstream part comprises a downstream connection profile, and wherein the flexible downstream connection element is engaged with the heater casing downstream part by securing the downstream connecting part of the downstream connection element with the downstream connection profile of the heater casing downstream part.15.The method according to any of the preceding claims 13 or 14, wherein a flexible upstream connection element is provided, wherein the upstream connection element comprises an upstream ring-shaped part and an upstream connecting part, wherein the heater casing upstream part comprises an upstream connection profile, and wherein the flexible upstream connection element is engaged with the heater casing upstream part by securing the upstream connecting part of the upstream connection element with the upstream connection profile of the heater casing downstream part.
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