Heating apparatus for an aerosol generating device

Abstract

A heating apparatus for an aerosol generating device is disclosed, the heating apparatus (10, 50, 90, 150) including an inner wall defining a heating zone (18, 58, 98, 158) and an opening (16, 56, 96, 156) through which an aerosol forming material may be received into the heating zone, a heater (32, 70, 118, 174) disposed on the inner wall and configured to provide heat to the aerosol forming material received in the heating zone, an outer wall (14, 54, 94, 154) positioned radially outward relative to the inner wall, and a glass connector (14, 54, 94, 154) connecting the inner wall and the outer wall.

Description

[Technical field]

[0001] The present invention relates to a heating device for an aerosol generating device and to an aerosol generating device comprising a heating device. The present disclosure is particularly applicable to portable aerosol generating devices that may be self-contained. In particular, the present invention relates to an aerosol generating device having a heater disposed within a vacuum or thermally insulated chamber. [Background technology]

[0002] The production of electronic cigarettes that heat but do not burn a solid or semi-solid aerosol-forming substrate, including tobacco, is a developing area of ​​interest. These devices typically receive a tobacco rod in a heating chamber. The rod is heated to release an aerosol that can be inhaled by the user. One problem with these devices is that the heater that provides heat to the heating chamber may also unnecessarily heat the rest of the device. In compact devices, this can be a disadvantage, as the temperature of the exterior surface of the device held by the user may become unacceptably high. To mitigate such effects, some aerosol generating devices are equipped with a vacuum chamber that can separate the heater from the exterior surface. This can provide thermal isolation between the heating chamber and the exterior surface held by the user.

[0003] In such aerosol generating devices, it is desirable to improve the efficiency of the heating operation so that the battery life of the device can be extended. To this end, vacuum insulators have been implemented in aerosol generating devices to thermally insulate the cavity in which the aerosol substrate is heated, thereby limiting heat loss to the external environment.

[0004] It is an object of the present invention to further improve heating efficiency and reduce undesirable heat losses. Summary of the Invention [Means for solving the problem]

[0005] According to one aspect of the present invention, a heating apparatus for an aerosol generating device is provided, the heating apparatus including: an inner wall defining a heating zone and an opening through which an aerosol forming material can be received into the heating zone; a heater disposed on the inner wall, the heater configured to provide heat to the aerosol forming material received in the heating zone; an outer wall positioned radially outward relative to the inner wall; and a glass connector connecting the inner wall and the outer wall.

[0006] In this way, the heating zone is insulated by an insulating space provided between the inner and outer walls (connected by a glass connection), and the glass connection can effectively prevent heat loss from the heating zone by preventing the conduction of thermal energy generated by the heater from the inner wall to the outer wall. The inner and outer walls form a double-walled insulator with an insulating space provided between them. It was found that the heating device according to the present invention using a glass connection between the inner and outer walls does not exist in the art. The common non-metallic material for constructing the housing in known aerosol generating devices is plastic due to its easy manufacturability and non-magnetic properties. As can be seen, the double-walled insulator in the heating device is a thin-walled insulating configuration that is difficult to manufacture, and the present invention effectively utilizes a glass connection to close the space between the inner and outer walls.

[0007] The use of glass would not be an obvious choice for use in thin-walled insulation structures, especially vacuum structures, due to its brittle nature and tendency to crack, however, glass has a poor thermal conductivity and prevents heat from the interior walls (and heating zones) from being conducted to the exterior walls of the heating apparatus. The surface area between the glass connection piece and the inner wall should be as small as possible to further limit heat conduction / loss. Thus, whereas known insulator heating devices use metallic connections, the glass connection acts as a "thermal bridge" between the inner and outer walls. Advantageously, this improves the effectiveness of the device in reducing heat transfer to the outer wall and the user's finger. Additionally, glass is electrically non-conductive and acts as an electrical insulator in arrangements where the inner wall includes metal or metallic materials.

[0008] Preferably, a vacuum is formed between the inner and outer walls, or an insulating material is provided between the inner and outer walls. In this way, the space (or insulating space) between the inner and outer walls can effectively prevent heat transfer away from the heating zone (i.e., the zone where the aerosol-forming substance is received and heated) defined by the inner wall. Examples of insulating materials that can be provided between the inner and outer walls include, but are not limited to, the following: air, aerogel material, powdered or fibrous insulating material. It should also be understood that when an insulating material is provided between the inner and outer walls, the space between the inner and outer walls does not necessarily have to be closed. For example, the at least one electrical insulator component may include one or more holes that allow air to flow through the at least one electrical insulator component (i.e., in and out of the insulating space between the inner and outer walls).

[0009] Preferably, the glass connection is laser welded to the inner wall. In this way, the high-precision laser welding technology ensures the joint between the inner wall and the glass connection. Preferably, the outer wall is made of glass and is integral with the glass connection. In this way, the outer wall can be directly connected to the inner wall, and the connection between the outer wall and the inner wall only needs to be done once, which further improves the ease of manufacture.

[0010] In some embodiments, the outer wall may comprise a metallic material, and a first end of the outer wall may be laser welded to the glass connection. In this way, both the inner and outer walls may be made of metallic materials to facilitate manufacturing. The inner wall may comprise a metallic material to improve thermal conduction from the heater to the received aerosol generating material / consumable in the heating zone. As will be appreciated, the use of a metallic outer wall requires that the glass connection also be connected to the outer wall by using a glass-metal bonding technique. Advantageously, laser welding ensures a particularly effective bond between the two surfaces and reduces the surface area required for bonding. As will be appreciated by those skilled in the art, other glass-metal bonding techniques may also be used. Preferably, the heating device further comprises a glass base, and a second end of the outer wall is laser welded to the glass base. When the outer wall comprises a metallic material, the glass base may provide additional thermal insulation to the inner wall at an end opposite the opening of the inner wall. As will be explained below, the inner wall may be part of a heater cup or a heater sleeve.

[0011] Preferably, the heating apparatus further includes a heater cup, the heater cup including an inner wall and an end that limits the insertion depth of the received aerosol forming material, and the heater cup is thus connected to the outer wall by a single glass connector disposed at or toward the opening of the heater cup.

[0012] In some embodiments, the heating device further includes a heater sleeve and a second glass connection, the heater sleeve constituting the inner wall. In these arrangements, the first glass connection can connect a first end of the inner wall to a first end of the outer wall, and the second glass connection can connect a second end of the inner wall to a second end of the outer wall. In this way, glass connections are provided at both ends of the heater sleeve, limiting heat conduction from the inner wall / heater sleeve. The heater sleeve allows air flow through the sleeve so that the generated aerosol can be carried by the air flow to the user upon inhalation.

[0013] Preferably, the heater is provided between the inner and outer walls. In other words, the heater may be provided in an insulating space between the inner and outer walls. Preferably, the heater is provided in a vacuum. Preferably, the heater comprises an electrically resistive track printed or coated on or wrapped around the outer surface of the inner wall. In this way, the heater can effectively transfer heat to the aerosol-generating material received in the inner wall by thermal conduction. A printed or coated heater can also ensure reliable electrical contact with the inner wall. Furthermore, manufacturability may be further improved. Alternatively, the heater may comprise a separate heater track, such as a thin film heater wrapped around the inner wall. Stated differently, the heater may comprise a thin film heater having a conductive metal track disposed between insulating layers, such as polyimide films.

[0014] Preferably, the heating device further comprises one or more wires configured to connect the heater to a power source capable of supplying power to the heater. Preferably, the heating device further comprises a thermocouple cable and / or a thermistor wire configured to connect the heater to a control circuit. In this manner, the temperature of the heater can be monitored and / or controlled by the control circuit.

[0015] Preferably, one or more wires and / or thermocouples and / or thermistor wires are molded into the glass to connect the heater to a power supply and / or control circuit, respectively. In this way, the glass base (or the base portion of the glass outer wall) has wires and / or thermocouples pre-molded into the glass for connecting to the heater. Molding the electrical wires and / or thermocouple / thermistor wires into the glass can protect the integrity of the vacuum or insulating space between the inner and outer walls by sealing the wires / thermocouples / thermistors into the glass. Alternatively, the wires or wires can be positioned through one or more gaps provided in the longitudinal face of the outer wall. In this way, the manufacturability of the heating device can be simplified. Furthermore, the wires can have a lower mass, which can be advantageous in terms of reducing the thermal mass of the device. One or more seals can be provided in the gaps to prevent air from entering the vacuum / insulating space and to fix the wires in place.

[0016] According to another aspect of the present invention, there is provided an aerosol generating device configured to generate an aerosol for inhalation by a user, the aerosol generating device including a heating apparatus according to the first aspect of the present invention.

[0017] According to another aspect of the present invention, there is provided a method of manufacturing a heating device according to the first aspect of the present invention, the method comprising the steps of: providing an inner wall defining a heating zone and an opening through which an aerosol forming substance can be received into the heating zone; positioning a heater on the inner wall; providing an outer wall radially outwardly from the inner wall; and connecting the inner wall to the outer wall with a glass connection.

[0018] Embodiments of the invention will now be described, by way of example only, with reference to the drawings in which: [Brief description of the drawings]

[0019] [Figure 1]1 is a schematic diagram of an aerosol generating device including a heating apparatus according to one embodiment of the present invention. [Diagram 2] 1 is a schematic cross-sectional view of a heating device according to one embodiment of the present invention; [Diagram 3] 4 is a schematic cross-sectional view of a heating device according to another embodiment of the present invention. [Figure 4] 4 is a schematic cross-sectional view of a heating device according to another embodiment of the present invention. [Diagram 5] 4 is a schematic cross-sectional view of a heating device according to yet another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] As described herein, a vapor is generally understood to refer to a substance that is in the gas phase below its critical temperature, meaning that the vapor can be condensed into a liquid by increasing the pressure without decreasing the temperature, whereas an aerosol is fine solid particles or liquid droplets suspended in air or another gas. However, it should be noted that the terms "aerosol" and "vapor" may be used interchangeably herein, particularly with respect to the form of inhalable medium that is generated for inhalation by a user.

[0021] FIG. 1 illustrates an aerosol generating device 2 according to an embodiment of the present invention. The aerosol generating device 2 is illustrated in an assembled configuration with exemplary internal components visible. The aerosol generating device 2 is a heat-non-combustion device, sometimes referred to as a tobacco vapor device, and includes a heating device 4 configured to receive an aerosol-generating material, e.g., an aerosol substrate, such as a tobacco rod. The aerosol generating device 2 may include a power source, such as a battery, and a control circuit for controlling the supply of power from the power source to the heating device 4. The heating device 4 is operable to heat, rather than burn, a rod of aerosol-generating material to generate a vapor or aerosol for inhalation by a user. Of course, those skilled in the art will appreciate that the aerosol generating device 2 illustrated in FIG. 1 is merely an exemplary aerosol generating device according to the present invention. Other types and configurations of tobacco vapor products, vaporizers, or electronic cigarettes may also be used as aerosol generating devices according to the present invention.

[0022] The following specific examples with reference to Figures 2, 3, 4 and 5 are described with a vacuum enclosed between the inner and outer walls of the heating device. However, it will be understood that the vacuum may be replaced with other insulating media / materials such as air, aerogel material, powder or fibrous insulating material that may be provided between the inner and outer tubes of the heating device. In such examples (where the vacuum is replaced with an insulating material), the space between the inner and outer walls may not be sealed and may allow air flow in and out.

[0023] FIG. 2 shows a schematic diagram of the heating device 10 having a heater cup 12 and an outer tube 14. The heater cup 12 constitutes the inner wall of the heating device 10, which defines an opening 16 through which an aerosol-forming substance, i.e., a consumable, can be received into a heating zone 18 of the heating device 10. The heater cup 12 comprises a metallic material, such as stainless steel, having good thermal conductivity properties. The opening 16 serves as an access point for inserting the consumable into the heating device 10 in its assembled form. The heater cup 12 is closed at its bottom to limit the insertion depth of the consumable. The outer tube 14 comprises a metallic material, such as steel or stainless steel, that is easily formed into a tubular or cylindrical shape.

[0024] The inner heater cup 12 is positioned radially within the inner surface of the outer tube 14 as concentric cylinders such that when viewed from above or below, i.e., in a direction parallel to the longitudinal axes of the heater cup and outer tube, the cup and outer tube are shown as concentric circles (not shown). In the alternative, the heater cup 12 and / or outer tube 14 may be formed in other types of cross-sectional shapes, such as a square or polygon.

[0025] The heater cup 12 has a lip 20 at its open end. The lip 20 is directed outwardly toward the outer tube 14. The inner edge of a ring-shaped top glass connection 22 is laser welded to the lip 20 to form a glass-to-metal seal 24 (or glass-to-metal joint). The outer edge of the top glass connection 22 is laser welded to the top end of the outer tube 14 to form a second glass-to-metal seal 26. In this particular example, the wall thickness of the top end of the outer tube 14 is reduced (relative to the main length of the outer tube 14) to allow the second glass-to-metal seal to bond more effectively.

[0026] It should be understood that the heater cup lip 20 and the top end of the outer tube 14 having a thinner wall thickness are not necessary to form a glass-to-metal seal. For example, the top glass connection 22 may be connected to the top end of the heater cup (e.g., the open end of the cup without a lip) and the wall of the outer tube 14 may have a constant wall thickness. In another example, the end of the outer tube 14 may be folded or bent so that it is perpendicular to the main length of the outer tube 14 to form a laser weld seal. Additionally, other glass-to-metal sealing techniques for forming a thin glass-to-metal seal will be apparent to those skilled in the art.

[0027] The top end of the outer tube 14 is positioned substantially in line with the open end of the heater cup 12, and the outer tube 14 has a length that extends beyond the length of the heater cup 12. A disk-shaped lower glass connection 28, i.e., glass base, is laser welded to the bottom end of the outer tube 14 to form a third glass-to-metal seal 30. Similar to the second glass-to-metal seal 26, the bottom end of the outer tube 14 has a reduced wall thickness. Other suitable glass-to-metal joining techniques and different designs for the third glass-to-metal seal 30 will be readily apparent to those skilled in the art.

[0028] The top and bottom glass connections 22, 28 close the space between the exterior surface of the heater cup 12 and the interior surface of the outer tube 14 to enclose a vacuum 40. Those skilled in the art will appreciate that the term "vacuum" refers to a space in which the pressure is significantly less than atmospheric pressure due to the removal of free matter, particularly air. The quality of the vacuum 40 formed between the inner tube 12 and the outer tube 14 can be a low vacuum, a medium vacuum, or a high vacuum. As explained above, the vacuum 40 may be replaced with other insulating media / materials to fill the space between the exterior surface of the heater cup 12 and the interior surface of the outer tube 14.

[0029] A heater 32 is provided on the exterior surface of the heater cup 12 (i.e., the heater is provided within a vacuum 40). The heater 32 is an electrically resistive track that may be printed or coated onto the heater cup 12. Alternatively, the heater 22 may be laminated onto the heater cup 12. Electrical wires 34 connect the heater 32 to a power source or a printed circuit board assembly (PCBA) (not shown). The heating apparatus 10 also optionally includes a thermocouple or thermistor wire 36 that is connected to the PCBA for monitoring and / or controlling the temperature of the heater 32.

[0030] The electrical wires 34 and thermocouple / thermistor wires 36 are molded into the bottom glass connection 28. Other techniques apparent to one skilled in the art may be used to route the wires 34, 36 through the bottom glass connection 28, such as holes and appropriate seals.

[0031] 3 shows another schematic diagram of a heating device 50 having a heater cup 52 and an outer cup 54. Similar to the heating device 10 of FIG. 2, the heater cup 52 constitutes the inner wall of the heating device 50, which defines an opening 56 through which a consumable can be received into a heating zone 58 of the heating device 50. The opening 56 serves as an access point for inserting a consumable into the heating device 50 in its constructed form, and the heater cup 52 comprises a metallic material having good thermal conductive properties. The heater cup 52 is closed at its bottom end to limit the insertion depth of the consumable.

[0032] Outer cup 54 comprises glass and is shaped to surround the entire exterior surface of heater cup 52 and space the exterior surface of heater cup 52 from the interior surface of outer cup 54 .

[0033] At the open end of the heater cup 52 is a lip 60 which forms a glass-to-metal seal 62 with a glass connection 64 of the outer cup 54. In this example, the glass connection 64 and the glass outer cup 54 are formed as a single piece of glass. However, it is clear that multiple pieces of glass could be used (and joined together). The glass-to-metal seal 62 is formed by laser welding or other suitable technique for forming a thin glass-to-metal joint. By forming the glass-to-metal seal 62 between the glass connection 64 of the glass outer cup 54 and the lip 60 of the inner heater cup 52, a vacuum 80 (or other insulating medium / material) can be enclosed between the exterior surface of the heater cup 52 and the interior surface of the outer cup 54. The quality of the vacuum 80 formed between the inner tube 12 and the outer tube 14 can be a low vacuum, a medium vacuum, or a high vacuum.

[0034] As will be appreciated, the glass base 66 of the outer cup 54 is also part of the same single piece of glass as the outer cup 54 and is spaced from the closed end 68 of the heater cup 52 (which limits the insertion of consumables within the heater cup 52).

[0035] 2, a heater 70 is disposed on the exterior surface of heater cup 52 within the vacuum between heater cup 52 and outer cup 54. Heater 70 is an electrically resistive track that may be printed or coated onto heater cup 52. Alternatively, heater 70 may be laminated onto heater cup 52. Electrical wires 72 connect heater 70 to a power source or a printed circuit board assembly (PCBA) (not shown). Heating apparatus 50 also optionally includes a thermocouple or thermistor wire 74 connected to PCBA 70 for monitoring and / or controlling the temperature of heater 32.

[0036] The electrical wires 72 and thermocouple / thermistor wires 74 are molded into the glass base 66 of the glass outer cup 54, although it will be apparent that other techniques (such as holes and appropriate seals) may be used to route the wires 72, 74 through the glass base 66 and would be apparent to one of ordinary skill in the art.

[0037] 4 shows another schematic diagram of a heating device 90 having an inner heater tube 92 and an outer tube 94. The heater tube 92, or heater sleeve, makes up the inner wall of the heating device 90, which defines an opening 96 capable of receiving a consumable into a heating zone 98 of the heating device 90. The opening 96 serves as an access point for inserting a consumable into the heating device 90 in its constructed form, and the heater tube / sleeve 92 comprises a metallic material having good thermal conductivity properties.

[0038] The outer tube 94 comprises a metallic material, such as steel or stainless steel, that is easily formed into a tubular or cylindrical shape. The inner heater tube 92 is positioned radially within the inner surface of the outer tube 94 as a concentric cylinder such that when viewed from above or below, i.e., in a direction parallel to the longitudinal axes of the heater tube 92 and outer tube 94, the cups and tubes are shown as concentric circles (not shown). In alternative examples, the heater tube 92 and / or outer tube 94 may be formed in other types of cross-sectional shapes, such as a square or polygon.

[0039] The heater tube 92 has a top lip 100 and a bottom lip 102, respectively, at the top and bottom ends of the tube 92. The top and bottom lips 100, 102 are turned outwardly toward the outer tube 94, and a ring-shaped upper glass connection 104 and a ring-shaped lower glass connection 106 are laser welded to the edges of the top and bottom lips 100, 102, respectively, to form an upper glass-to-metal seal 108 and a lower glass-to-metal seal 110, respectively. Other suitable glass-to-metal joining techniques may also be used.

[0040] The top and bottom ends of the metal outer tube 94 are laser welded (or otherwise joined) to the upper and lower glass connection / rings 104, 106, respectively, in a manner similar to that described with reference to the outer tube 14 of the heating device 10 of FIG. 2, forming a second upper glass-to-metal seal 112 between the outer tube 94 and the upper glass ring 104, and a second lower glass-to-metal seal 114 between the outer tube 94 and the lower glass ring 106. It will be appreciated that the wall thickness of the ends of the outer tube 94 may be thin relative to the main length of the outer tube 94 to ensure an effective glass-to-metal joint by the laser welding process. Other configurations of the glass-to-metal seals 108, 110, 112, 114 will be apparent to those skilled in the art.

[0041] The upper and lower glass rings 104, 106 close the space between the outer surface of the heater tube 92 and the inner surface of the outer tube 94 to enclose a vacuum 130 (or other insulating material). The quality of the vacuum 130 formed between the inner tube 92 and the outer tube 94 can be low, medium, or high.

[0042] Heater tube 92 further optionally includes a plug 116 positioned within heater tube 92 to serve as an abutment for the inserted consumable. Plug 116 may be ring-shaped, i.e., have an opening to allow air flow across plug 116, or may be a solid block that prevents air flow.

[0043] Heating device 90 includes a heater 118 and wires 120, 122 similar to those described above with reference to heating devices 10, 50 of Figures 2 and 3. The wires 120, 122 may be molded into the lower glass ring 104 or may pass through one or more holes in the wall of the inner heater tube 92 (below plug 114, if present), with appropriate seals used to maintain vacuum 130.

[0044] 5 shows another schematic diagram of a heating device 150 having an inner heater tube 152 and an outer tube 154. The heater tube / sleeve 152, similar to the heater sleeve 92 of FIG. 4, constitutes the inner wall of the heating device 150, which defines an opening 156 capable of receiving a consumable into a heating zone 158 of the heating device 150.

[0045] The heater tube / sleeve 152 comprises a metallic material having good thermal conductivity properties and has a top lip 160 and a bottom lip 162 at the top and bottom ends, respectively, of the tube 152. The top and bottom lips 160, 162 are directed outwardly toward the outer tube 154.

[0046] The outer tube 154 comprises a glass cylinder having a ring-shaped upper glass connection 164 and a ring-shaped lower glass connection 166 at its top and bottom ends to form a single piece of glass. In another example, the glass rings 164, 166 can be bonded to the glass cylinder.

[0047] Top and bottom glass connectors / rings 164, 166 are laser welded to the edges of the top and bottom lips 160, 162, respectively, to form top glass-to-metal seal 168 and bottom glass-to-metal seal 170, respectively. Other suitable glass-to-metal joining techniques may be used and other configurations for the glass-to-metal seals 168, 170 will be apparent to those skilled in the art.

[0048] The upper and lower glass rings 164, 166 close the space between the outer surface of the heater tube 152 and the inner surface of the outer tube 154 to enclose a vacuum 180 (or other insulating material). The quality of the vacuum 180 formed between the inner tube 152 and the outer tube 154 can be low, medium, or high vacuum.

[0049] Heater tube 152 further optionally includes a plug 172 positioned within heater tube 152 to serve as an abutment for the inserted consumable. Plug 172 may be ring-shaped, i.e., have an opening to allow air flow across plug 172, or may be a solid block that prevents air flow.

[0050] Heating device 150 includes a heater 174 and wires 176, 178 similar to those described with reference to heating devices 10, 50, 90 above in Figures 2, 3 and 4. The wires 176, 178 may be molded into the lower glass ring 166 or may pass through one or more holes in the wall of the inner heater tube 152 (below plug 172, if present), with appropriate seals to maintain a vacuum 180.

Claims

1. 1. A heating apparatus for an aerosol generating device, comprising: an interior wall defining a heating zone and an opening through which an aerosol-forming material can be received into the heating zone; a heater disposed on the inner wall, the heater configured to provide heat to an aerosol-forming material received in the heating zone; an outer wall positioned radially outward relative to the inner wall; a glass connection portion connecting the inner wall and the outer wall; A heating device comprising:

2. The heating device of claim 1 , wherein a vacuum is formed between the inner wall and the outer wall, or an insulating material is provided between the inner wall and the outer wall.

3. The heating device of claim 1 , wherein the glass connection is laser welded to the inner wall.

4. 2. The heating device of claim 1, wherein the outer wall is made of glass and is integral with the glass connection.

5. The heating device of claim 1 , wherein the outer wall comprises a metallic material, and a first end of the outer wall is laser welded to the glass connection.

6. The heating device of claim 5 further comprising a glass base, the second end of the outer wall being laser welded to the glass base.

7. 10. The heating device of claim 1, further comprising a heater cup, the heater cup including the inner wall and an end that limits the insertion depth of the received aerosol-forming substance.

8. 2. The heating device of claim 1, further comprising: a heater sleeve; and a second glass connection, wherein the heater sleeve includes the inner wall, the first glass connection connecting a first end of the inner wall to a first end of the outer wall, and the second glass connection connecting a second end of the inner wall to a second end of the outer wall.

9. The heating device of claim 1 , wherein the heater is disposed between the inner wall and the outer wall.

10. 10. The heating device of claim 1, wherein the heater comprises an electrically resistive track printed or coated on the inner wall or wrapped around the inner wall.

11. The heating device of claim 1 , further comprising one or more wires configured to connect the heater to a power source capable of providing power to the heater.

12. The heating device of claim 1 , further comprising a thermocouple cable and / or a thermistor wire configured to connect the heater to a control circuit.

13. 12. The heating device of claim 11, wherein the one or more wires and / or the thermocouple and / or thermistor wires are molded into glass to connect the heater to the power supply and / or the control circuit, respectively.

14. An aerosol generating device configured to generate an aerosol for inhalation by a user, comprising a heating apparatus according to any one of claims 1 to 13.

15. A method for manufacturing a heating device according to any one of claims 1 to 13, comprising the steps of: providing an interior wall defining a heating zone and an opening through which an aerosol-forming substance can be received into the heating zone; disposing a heater on the interior wall; providing an outer wall radially outward from the inner wall; connecting the interior wall to the exterior wall with a glass connection; A method comprising:

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