Susceptor for aerosol generating device and aerosol generating device

Abstract

The present invention provides a heating assembly, an infrared heating assembly (5), a method for installing the heating assembly, and an aerosol generating device, the heating assembly (5) comprising a tubular heating element (51) surrounding an aerosol-forming substrate to form a heating cavity for accommodating the aerosol-forming substrate, a temperature measuring element (53) for detecting the temperature of the heating element (51), and a support member (54) including a layer (541) made of a heat-retaining material configured to surround at least a portion of the length of the heating element (51), the support member (54) having a clamping structure for fixing the temperature measuring element (53). The structure of the support member (54) effectively prevents the support member (54) from absorbing heat generated by the heating element (51), thereby improving the thermal utilization rate of the heating assembly (5).

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority from a prior application filed with the State Intellectual Property Office of China on July 28, 2022, bearing application number 202210901671.X and entitled "Heating assembly, infrared heating assembly, installation method thereof, and aerosol generating device," the contents of which are incorporated herein by reference.

[0002] This application claims priority from a prior application filed with the State Intellectual Property Office of China on May 26, 2023, bearing application number 202321319281.8 and entitled "Heating Assembly and Aerosol Generating Apparatus," the contents of which are incorporated herein by reference.

[0003] FIELD OF THE INVENTION The present application relates to the field of aerosol generating devices, and more particularly to a heating assembly, an infrared heating assembly, a method for mounting a heating assembly, and an aerosol generating device. [Background technology]

[0004] The aerosol generating device includes a heating device that heats, rather than combusts, an aerosol-forming substrate to emit the aerosol. The heating device includes a heating element and a temperature measuring element. In the prior art, the heating element is configured as a heat generating tube, and the temperature measuring element in the heating device is fixed by wrapping it around the heat generating tube with double-sided tape. This method of fixing the temperature measuring element is not secure, and the temperature measuring element is prone to movement, which can lead to inaccurate temperature measurement by the temperature measuring element and further affect the heating effect of the heating device.

[0005] The heating device further includes a bracket to assist in fixing the temperature measuring element and electrically connecting the load; the bracket is usually made of high-temperature resistant PEEK material, is located close to the heating element, and absorbs heat, thereby absorbing the heat generated by the heating element and thereby reducing the thermal energy utilization rate of the heating element. Summary of the Invention

[0006] In order to solve the problems of fixing the temperature measuring element and reducing the heat absorption of the bracket in the prior art, an embodiment of the present application provides a heating device for heating an aerosol-forming substrate to generate an aerosol, the heating device comprising: a tubular heating element surrounding the aerosol-forming substrate to form a heating cavity for receiving the aerosol-forming substrate; a temperature measuring element fixed to a surface of the heating element; a support member including a layer of thermally insulating material configured to surround at least a portion of the length of the heating element; The support member is provided with a clamping structure for fixing the temperature measuring element, thereby providing a heating assembly.

[0007] This application is a tubular heating element; a temperature measuring element fixed to a surface of the heating element; a layered member configured to surround at least a portion of the length of the heating element; and a support member including a stationary tube circumferentially enveloping at least a portion of an outer surface of the layered member, the layered member being made from a thermally insulating material; The heating assembly further includes a clamping structure on the support member for fixing the temperature measuring element.

[0008] This application is a tubular heating element; a temperature measuring element fixed to a surface of the heating element; a support member including a layered member made from aerogel configured to surround at least a portion of the length of the heating element; The infrared heating assembly further includes a clamping structure on the support member for fixing the temperature measuring element.

[0009] This application is wrapping a thermally insulating layer around an outer surface of the heating element; a step of fitting a fixed pipe onto the outer periphery of the heat-insulating layered member; and inserting a temperature measuring element through an opening in the thermally insulating layer.

[0010] The present application further provides an aerosol generating device comprising a heating device including the heating assembly described above, and a power supply assembly that provides electrical power drive to the heating device.

[0011] The support member in the heating assembly includes a layer made of a heat-retaining material and surrounding at least a portion of the surface of the heating element, so that the heat generated by the heating element is surrounded by the layer, further reducing the heat transfer from the heating element to the outside. The support member also includes a clamping structure, and the temperature measuring element is fixed to the clamping structure, which is secure and reliable, further improving the accuracy of the temperature measurement result by the temperature measuring element, simplifying the structure, and improving the thermal utilization rate of the heating assembly.

[0012] Another embodiment of the present application provides a heating assembly and an aerosol generating device that helps ensure that the temperature measuring element is in the correct temperature measurement location.

[0013] Another embodiment of the present application is a heating tube having a heating cavity therein for containing at least a portion of the aerosol-generating product; a temperature measuring element including a probe in contact with the heating tube and a conductive pin having a bent portion connected to the probe; and a backstop configured to stop the bending portion and prevent movement of the probe.

[0014] The examples of the present application are a heating tube having a heating cavity therein for containing at least a portion of the aerosol-generating product; a temperature measuring element including a probe and a conductive pin connected to the probe; a fixed tube surrounding an outer periphery of at least a part of the heating tube, wherein at least a part of the probe is held between the fixed tube and the heating tube, a first through hole is formed in the fixed tube, and the conductive pin passes through the first through hole; The heating assembly is provided such that the extending direction of the conductive pin between the fixed pipe and the heating pipe and the penetrating direction of the first through-hole are not aligned on the same straight line.

[0015] Another embodiment of the present application provides an aerosol generating device including the heating assembly and further including a power supply assembly for providing a power supply to the heating assembly.

[0016] In the above-mentioned heating assembly and aerosol generating device, a bent portion is formed in the conductive pin, and the anti-retraction portion can stop the bent portion, so that when the conductive pin is pulled, the anti-retraction portion and the bent portion cooperate to prevent the probe from moving, ensuring that the probe can be maintained in a predetermined temperature measurement position. [Brief explanation of the drawings]

[0017] One or more embodiments are illustratively described by corresponding figures in the accompanying drawings, but these illustrative descriptions are not intended to be limiting of the embodiments, and in the drawings, elements with the same reference numerals designate similar elements and, unless otherwise specified, the figures in the drawings are not to scale.

[0018] [Figure 1] 1 is a schematic diagram of an aerosol generating device provided according to one embodiment of the present application. [Figure 2] 1 is a schematic diagram of a heating assembly provided in accordance with one embodiment of the present application. [Figure 3] FIG. 1 is an exploded view of a heating assembly provided in accordance with one embodiment of the present application. [Figure 4] 2 is a schematic diagram of a first layer member 231 provided according to one embodiment of the present application. [Figure 5]1 is a schematic diagram of an electrical connection member provided by an embodiment of the present application; [Figure 6] 1 is a schematic diagram of a fixed tube provided by one embodiment of the present application. [Figure 7] 1 is a schematic diagram of an electric heating element provided according to one embodiment of the present application; [Figure 8] FIG. 2 is another schematic diagram of an electric heating element provided according to an embodiment of the present application. [Figure 9] 2 is a schematic diagram of a heating assembly provided in accordance with an embodiment of the present application with a fixed tube removed; FIG. [Figure 10] 1 is a schematic diagram of a heating assembly provided in accordance with an embodiment of the present application having end caps. [Figure 11] 1 is a schematic diagram of a thermocouple temperature measurement device provided in accordance with one embodiment of the present application. [Figure 12] FIG. 2 is another schematic diagram of a thermocouple temperature measuring device provided in accordance with an embodiment of the present application. [Figure 13] 1 is a structural schematic diagram of an aerosol generating device provided in an embodiment of the present application. [Figure 14] 1 is a perspective view of a heating assembly provided in accordance with an embodiment of the present application; [Figure 15] 1 is an exploded view of a heating assembly provided by an embodiment of the present application; [Figure 16] 1 is a perspective view of a heating element provided in accordance with an embodiment of the present application; [Figure 17] 1 is a perspective view of an electrical connection member provided by an embodiment of the present application; [Figure 18] 1 is a perspective view of a layered member provided by an embodiment of the present application. [Figure 19] 1 is a structural schematic diagram of a temperature measuring element and an electrical connection member provided in an embodiment of the present application, the temperature measuring element and the electrical connection member being fixed to a layer member; [Figure 20] 1 is a perspective view of a fixed tube provided by an embodiment of the present application; [Figure 21a] 1 is an assembly schematic diagram of a heating assembly provided by an embodiment of the present application. [Figure 21b] 1 is an assembly schematic diagram of a heating assembly provided by an embodiment of the present application. [Figure 21c] 1 is an assembly schematic diagram of a heating assembly provided by an embodiment of the present application. [Figure 21d] 1 is an assembly schematic diagram of a heating assembly provided by an embodiment of the present application. [Figure 21e] 1 is an assembly schematic diagram of a heating assembly provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0019] In order to facilitate understanding of the present application, the present application will now be described in more detail with reference to the drawings and specific embodiments.

[0020] It should be explained that all directional indications in the examples of the present application (e.g., up, down, left, right, front, back, horizontal, vertical, etc.) are merely for interpreting the relative positional relationship, movement status, etc. between each component in a certain specific posture (as shown in the drawings), and when the specific posture changes, the directional indications also change accordingly, the aforementioned "connection" may be a direct connection or an indirect connection, and the aforementioned "installation," "installed on," and "installed on" may be directly installed or indirectly installed.

[0021] Furthermore, references to "first," "second," etc. in this application are for illustrative purposes only and should not be understood as indicating or implying the relative importance or quantity of the technical features indicated. Thus, a feature qualified as "first" or "second" expressly or implies the inclusion of one or more of that feature.

[0022] Example 1 Referring to FIG. 1, one embodiment of the present application provides an aerosol generating device for heating an aerosol-generating product 1 to generate an aerosol.

[0023] In one embodiment, the aerosol-generating product 1 may be a product including an aerosol-forming substrate for releasing volatile compounds that can form an aerosol by heating rather than combustion. Compared to aerosols generated by decomposing the aerosol-forming substrate by combustion or pyrolysis, the aerosol formed by heating the aerosol-forming substrate contains fewer known hazardous components. In one example, the aerosol-generating product is removably connected to an aerosol-generating device. The aerosol-generating product 1 may be disposable or reusable. In one example, the aerosol-forming substrate includes tobacco, leaf tobacco, shredded tobacco, or tobacco paste.

[0024] The aerosol generating device is a device that combines or interacts with an aerosol-generating product 1 to form an inhalable aerosol. For example, the aerosol generating device may be an electrically operated aerosol generating device having a power supply assembly 3 and a heating assembly 2 therein, and the power supply assembly 3 provides energy for heating the aerosol-generating product 1 via the heating assembly 3.

[0025] The heating assembly 2 includes an external heating assembly, an internal heating assembly, or an air heating assembly. As used herein, the term "external heating assembly" refers to a heating assembly that is positioned outside the aerosol-generating product when the aerosol-generating product is combined with an aerosol-generating device. As used herein, the term "internal heating assembly" refers to a heating assembly that is positioned at least partially within the aerosol-generating product when the aerosol-generating product is combined with an aerosol-generating device. As used herein, the term "air heating assembly" refers to a heating assembly that heats air in an intake passage located upstream of the aerosol-generating product to make at least a portion of the air in the airflow passage hot air, which then enters the aerosol-generating product and releases heat to heat the aerosol-generating product.

[0026] 2 and 3, the heating assembly 2 includes a heating tube 21, which has a heating cavity 211 within it that can accommodate at least a portion of the aerosol-generating product 1, and the aerosol-forming substrate of the aerosol-generating product 1 is heated within the heating cavity 211 to generate an aerosol. Referring to FIGS. 2 and 3, the upper end of the heating cavity 211 is open and has an inlet for inserting the aerosol-generating product 1 into the heating cavity 211, so that the aerosol-generating product 1 can be inserted into the heating cavity 211 from the upper end of the heating cavity 211.

[0027] When the heating assembly 2 is an internal heating assembly, it further includes an insert member at least partially disposed within the heating cavity 211, such that when the aerosol-generating product 1 is inserted into the heating cavity 211, at least a portion of the insert member is inserted into the aerosol-forming substrate. In this embodiment, the insert member may include a susceptor. As used herein, the term "susceptor" refers to a material capable of converting electromagnetic energy into heat. When positioned within a changing electromagnetic field, eddy currents may form within the susceptor, causing the susceptor to heat.

[0028] Based on this, a magnetic field generator can be installed or connected to the heating tube 21. The magnetic field generator is used to generate a changing magnetic field to heat the inserted member in the heating tube 21. Here, the magnetic field generator is electrically connected to a power supply assembly, and the power supply assembly provides the magnetic field generator with a current that generates the changing magnetic field. The magnetic field generator can include one or more induction coils that generate the changing magnetic field, and the one or more induction coils can be coupled to the heating tube 21 and surround the susceptor. In one embodiment, the one or more induction coils can be formed on the outer surface of the heating tube 21 by printing or can be coupled to the outer surface of the heating tube 21 in the form of a film layer.

[0029] Here, the susceptor can comprise metal or carbon. In one embodiment, the susceptor can comprise a ferromagnetic material, such as ferrite, ferromagnetic steel, or stainless steel. In one embodiment, the susceptor comprises a nickel-iron alloy. In one embodiment, the susceptor comprises 400 series stainless steel, including 410, 420, or 430 stainless steel. Different materials dissipate different amounts of energy when positioned in electromagnetic fields of similar frequency and field strength. Therefore, susceptor parameters, such as material type, length, width, and thickness, can all be varied to provide the required power dissipation in a known electromagnetic field.

[0030] When the heating assembly 2 is an external heating assembly, see FIGS. 3, 7 and 8, the heating tube 21 may include a tubular base 212 and an electric heating element 213 coupled to the base 212.

[0031] The electric heating element 213 can include a resistive heating element, the resistive material of which includes, but is not limited to, semiconductors, such as doped ceramics, conductive ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composites of ceramic and metallic materials. Such composites can include doped or undoped ceramics. Suitable examples of doped ceramics include doped silicon carbide. Suitable examples of metals include titanium, zirconium, tantalum, and platinum group metals. Suitable examples of metal alloys include stainless steel, Constantan, nickel-containing alloys, cobalt-containing alloys, chromium-containing alloys, aluminum-containing alloys, titanium-containing alloys, zirconium-containing alloys, hafnium-containing alloys, niobium-containing alloys, molybdenum-containing alloys, tantalum-containing alloys, tungsten-containing alloys, tin-containing alloys, gallium-containing alloys, manganese-containing alloys, and iron-containing alloys, as well as nickel-, iron-, and cobalt-based superalloys, stainless steels, iron-aluminum-based alloys, and iron-manganese-aluminum-based alloys. In composite materials, the resistive material may be embedded within, encapsulated by, or coated with an insulating material, or vice versa, as desired.

[0032] The resistive heating element may be a coating or printed layer of resistive material formed on the exterior surface of the substrate 212, a heating film covering the exterior surface of the substrate 212, a resistive wire or network provided on the exterior surface of the substrate 212, or a conductive ceramic. It should be noted that in other embodiments, the substrate 212 of the heater tube may be made of a conductive ceramic, thereby eliminating the need for an additional resistive heating element.

[0033] The electric heating element 213 may include an infrared heating element, which may be an infrared heating coating, formed on the outer surface of the substrate 212 made of an infrared-transparent material such as quartz. The infrared heating element generates thermal energy when energized and can also generate infrared rays of a certain wavelength, for example, 0.75 μm to 1000 μm. The infrared heating coating may optionally be a far-infrared heating ink, ceramic powder, and inorganic adhesive that are thoroughly and uniformly mixed and then applied to the outer surface of the substrate, followed by drying and curing for a certain period of time. The thickness of the infrared heating coating is 30 μm to 50 μm. Of course, the infrared electric heating coating may be a mixture of tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride, and anhydrous copper sulfate in a certain ratio, which is then stirred and applied to the outer surface of the substrate; or may be any one of a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium titanium-based oxide ceramic layer, a zirconium titanium-based nitride ceramic layer, a zirconium titanium-based boride ceramic layer, a zirconium titanium-based carbide ceramic layer, an iron-based oxide ceramic layer, an iron-based nitride ceramic layer, an iron-based boride ceramic layer, an iron-based carbide ceramic layer, a rare earth oxide ceramic layer, a rare earth nitride ceramic layer, a rare earth boride ceramic layer, a rare earth carbide ceramic layer, a nickel-cobalt-based oxide ceramic layer, a nickel-cobalt-based nitride ceramic layer, a nickel-cobalt-based boride ceramic layer, a nickel-cobalt-based carbide ceramic layer, or a high-silica molecular sieve ceramic layer, or other conventional coatings.

[0034] In one embodiment, the electric heating element 213 includes a heat generating member 2131 that generates heat or infrared rays when energized, and an electrode member 2312 electrically connected to the heat generating member 2131, the resistance of the electrode member 2312 being lower than the resistance of the heat generating member 2131, and the electrode member 2312 being used to electrically connect the heat generating member 2131 and the electrical connection member 22. In one embodiment, the electric heating element 213 includes a heat generating member 2131 that generates heat or infrared rays when energized, and the heat generating member 2131 is directly electrically connected to the electrical connection member 22.

[0035] The outer surface of the heating tube 21 has a second position which is a predetermined temperature measurement position, and the second position may be in a heat concentration area of the heating tube 21, which has a higher temperature or rises in temperature faster than other areas of the heating tube 21.

[0036] 2, 3, and 9, the heating assembly 2 includes a temperature measuring element 26 that is in close contact with the outer surface of the heating tube 21 and detects the temperature of the heating tube 21. Specifically, the temperature measuring element 26 includes a probe 261 that is in contact with the second position of the heating tube 21 and a conductive pin 262 connected to the probe 261. In an example provided in the present application, the temperature measuring element 26 is configured as a thermistor temperature measuring device, and the thermistor includes a thermistor core provided in the probe 261 and two conductive pins 262 that are respectively connected to two electrodes of the thermistor chip. At least a portion of the thermistor chip and the two conductive pins 262 are enclosed inside a housing to form the thermistor temperature measuring device. The two conductive pins 262 are electrically connected to the control board 31 of the power supply assembly 3 and transmit temperature information to the control board 31 of the power supply assembly 3. The control board 31 further controls the amount of power supplied from the battery 32 to the heating tube 21 based on the real-time temperature information of the heating tube 21 measured by the thermistor temperature measuring device. The housing of the thermistor temperature measuring device probe 261 may include a good thermal conductor 263. The good thermal conductor 263 is made of a thermally conductive material and has high thermal conductivity. A thermally conductive material may be understood to be a material having a thermal conductivity of at least 10 W / mK, preferably at least 40 W / mK, and more preferably at least 100 W / mK at 23°C and 50% relative humidity. Specifically, the thermally conductive material is made of a material having a thermal conductivity of at least 40 W / mK, preferably at least 100 W / mK, more preferably at least 150 W / mK, and most preferably at least 200 W / mK at 23°C and 50% relative humidity. Suitable heat-conducting materials include, but are not limited to, graphite, graphene, aluminum, copper, zinc, steel, silver, heat-conducting polymers, or any combination or alloy thereof. The good heat-conducting member 263 is closely attached to the heating tube 21 and has good heat conductivity, so that the temperature of the surface of the heating tube 21 can be quickly matched.In order to improve the sensitivity of the good thermal conductivity member 263 to temperature changes in the heating pipe 21 and reduce the heat absorbed by the good thermal conductivity member 263 from the heating pipe 21, the thickness of the thermal conductivity material forming the good thermal conductivity member 263 can be reduced; for example, the thickness of the thermal conductivity material can be between 0.03 mm and 1.5 mm, or the thickness of the thermal conductivity material can be 0.1 mm.

[0037] In another embodiment, see FIGS. 11 and 12 , the temperature measuring element 26 is configured as a thermocouple temperature measuring device, which includes a good thermal conductivity member 263 and two thermocouple wires, the high-temperature ends of the two thermocouple wires are connected to the good thermal conductivity member 263, and the low-temperature ends are used to electrically connect to the control board 31 of the power supply assembly 3, so that the control board 31 can obtain the temperature of the high-temperature ends of the thermocouple wires based on the thermoelectric power caused by the temperature difference between the high-temperature ends and the low-temperature ends of the thermocouple wires.

[0038] 11 and 12, the good thermal conductivity member 263 includes a base 2631, a protrusion 2632 formed from the base 2631 toward the outer surface of the heating tube 21, and two elastic abutment arms 2633 bent and extending from opposite sides of the base 2631. A welding retraction space 2634 is defined between the free ends of the two elastic abutment arms 2633. The high-temperature ends of the two thermocouple wires are welded to the surface of the base 2631 or the protrusion 2632 opposite the heating tube 21 and can be exposed by the welding retraction space 2634. A welding laser or welding head can pass through the welding retraction space 2634 to weld the high-temperature ends of the two thermocouple wires to the good thermal conductivity member 263. Here, in order to prevent the edge of the base 2631 from damaging or scratching the surface layer (e.g., the insulating layer) of the heated tube 21 in the movement direction called the first direction in which the temperature measuring element 26 moves along the surface of the heated tube 21 to bring the probe 261 to the second position, the probe 261 may have a protrusion 2632 formed from the base 2631 toward the outer surface of the heated tube 21, and the protrusion 2632 has an arc-shaped corner at least on its edge in the first direction, thereby preventing the edge of the protrusion 2632 in the first direction from damaging the surface layer of the heated tube 21 in the process of the thermocouple temperature measuring device moving along the outer surface of the heated tube 21 to the second position, for example, preventing the protrusion 2632 from scratching the insulating layer on the outer surface of the heated tube 21. Since the material, e.g., a metal piece, from which the probe 261 is made has a small thickness that can be 0.03 mm to 1.2 mm, pressing is more effective for forming the protrusion 2632 with an arc-shaped corner at the edge than grinding the edge of the material, e.g., a metal piece, into a fillet. It should be noted that the good thermal conductivity member 263 is configured as the probe 261 of the thermocouple temperature measuring instrument, and the two thermocouple wires are configured as the conductive pins 262.

[0039] When the probe 261 of the temperature measuring element 26 is set at the second position, the conductive pin 262 connected to the probe 261 is typically pulled during the process of electrically connecting the conductive pin 262 to the power supply assembly 3. However, in order to prevent the probe 261 from shifting from the second position due to the pulling of the conductive pin 262, the heating assembly 2 may be configured with a structure that can prevent the probe 261 from moving in the pulling direction.

[0040] In one embodiment, the heating assembly 2 includes a fixed tube 232 that surrounds the outer periphery of at least a portion of the heating tube 21, and at least a portion of the probe 261 is held between the fixed tube 232 and the heating tube 21; specifically, the fixed tube 232 can press the probe 261 to tightly contact the heating tube 21 and prevent the probe 261 from moving.

[0041] The fixed tube 232 has a first through hole 2321 through which the conductive pin 262 can pass. Since the penetration direction of the first through hole 2321 and the extension direction of the conductive pin 262 between the fixed tube 232 and the heating tube 21 are not on the same line, the first through hole 2321 can change the extension direction of the conductive pin 262. As a result, the conductive pin 262 needs to bend when passing through the first through hole 2321. Naturally, it is not excluded that the conductive pin 262 between the fixed tube 232 and the heating tube 21 may be bent. In one example, the central axis of the first through hole 2321 is inclined with respect to the axial direction of the heating tube 21, for example, the central axis of the first through hole 2321 is perpendicular to the axial direction of the heating tube 21, so that the conductive pin 262 connected to the probe 261 needs to change its extension direction to pass through the first through hole 2321, or the conductive pin 262 located in the first through hole 2321 needs to have a different extension direction from the conductive pin 262 located between the probe 261 and the first through hole 2321, so that the conductive pin 262 is bent by passing through the first through hole 2321.

[0042] For clarity, the conductive pin 262 between the probe 261 and the first through-hole 2321 is defined as the first portion, the conductive pin 262 located within the first through-hole 2321 as the second portion, and the conductive pin 262 outside the first through-hole 2321 as the third portion. The first and second portions extend in different directions, i.e., bending occurs between the first and second portions. When the third portion is pulled, the bending of the conductive pin 262 can cause the forces received by the first and third portions to be different, such that the force received by the first portion is smaller than the force received by the third portion. It should be noted that the first portion may have a certain length and can be positioned between the fixed tube 232 and the heating tube 21, but is not limited thereto.

[0043] Specifically, when the third portion is pulled, the wall of the first through hole 2321 can contact and support the second portion, or can contact and support the bend of the conductive pin 262 formed by the first through hole 2321, and the support force on the conductive pin 262 provided by the wall of the first through hole 2321 can reduce the acting force received by the first portion.

[0044] Alternatively, when the third portion is pulled slightly, the degree of bending formed in the first through hole 2321 can be changed, for example, by increasing the included angle between the first portion and the second portion so that the conductive pin 262 extends an appropriate distance along the direction of the pulling force, thereby reducing the pulling force that the first portion must bear.

[0045] Therefore, the bend formed in the first through-hole 2321 can reduce the force acting on the probe 261 along the conductive pin 262, which is received by the probe 261, and thus helps to prevent the probe 261 from moving.

[0046] 2 and 3, in one embodiment, the conductive pin 262 has a bent portion formed by bending, and there may be one or more bent portions, and the heating assembly 2 further includes a back-off prevention portion, and there may be one or more bent portions, and each back-off prevention portion is provided corresponding to at least one of the bent portions, and the back-off prevention portion and the corresponding bent portion can be positionally adjacent to each other without contacting each other, or can be in contact with each other, so that when the conductive pin 262 is pulled, the back-off prevention portion can stop the bent portion that contacts it by deformation or the bent portion that is in contact with it, and provide a stopping force that resists the pulling force of the conductive pin 262, and the stopping force can reduce the pulling force of the conductive pin 262 on the probe 261, and therefore the back-off prevention portion can prevent the probe 261 connected to the conductive pin 262 from shifting from the second position.

[0047] For example, when the probe 261 of the temperature measuring element 26 is disposed in the second position, the conductive pin 262 connected to the probe 261 is normally pulled during the process of electrically connecting the conductive pin 262 to the power supply assembly 3. At this time, the anti-retraction portion and the bent portion work together to reduce the pulling force of the conductive pin 262 on the probe 261 when the conductive pin 262 is pulled, thereby helping to hold the probe 261 in the second position and prevent movement of the probe 261. The anti-retraction portion and the bent portion also reduce the pulling force of the conductive pin 262 on the probe 261, helping to prevent the integrity of the connection between the probe 261 and the conductive pin 262 from being destroyed by the pulling force and to protect the temperature measuring element 26.

[0048] 2 and 3 , in one embodiment, the outer surface of the heating tube 21 further includes a first position, and the heating assembly 2 includes a layered member 23 surrounding at least a portion of the heating tube 21. Here, the layered member 23 includes a first layered member 231 having a first guide groove 2312, which connects the first position to a second position, and at least the second position of the first and second positions can be exposed within the first guide groove 2312, and the first guide groove 2312 can provide a passage for guiding a probe 261 from the first position to the second position. The probe 261 can move from the first position to the second position along the surface of the heating tube 21. In one example, the length of the first guide groove 2312 in the axial direction of the heating tube 21 is the same as the length of the probe 261. In one example, the length of the first guide groove 2312 in the axial direction of the heating tube 21 is greater than the length of the probe 261.

[0049] The conductive pin 262 has a bent portion at or near the first position, and accordingly has a back-off prevention portion at or near the first position, which stops the bent portion here, thereby preventing the probe 261 from moving away from the second position when the conductive pin 262 is pulled.

[0050] The extension direction of the first guide groove 2312 may be approximately parallel to the axial direction of the heating tube 21. The second position may be provided at one end of the first guide groove 2312, that is, in the direction of guiding the first guide groove 2312 to the second position, the first layer-like member 231 has a first end wall that defines the extension end point of the first guide groove 2312, and the probe 261 is stopped by the first end wall when it is at the second position, thereby ensuring that the probe 261 can be accurately moved to the second position.

[0051] The width of the first guide groove 2312 may be greater than the width of the probe 261, thereby reducing the resistance of the first guide groove 2312 to the probe 261 when the probe 261 is moved along the first guide groove 2312 to the second position. The width of the first guide groove 2312 may be equal to the width of the probe 261, thereby preventing undesired movement of the probe 261 in the circumferential direction of the heating tube 21 by groove walls of the first guide groove 2312 provided on opposite sides of the temperature measuring element 26. Of course, in other embodiments, the width of the first guide groove 2312 may be slightly smaller than the width of the probe 261, thereby allowing the first guide groove 2312 to clamp the probe 261 and help hold the probe 261 in the second position.

[0052] In one example, the first position can also be exposed within the first guide groove 2312, and the first guide groove 2312 can provide a path for the probe 261 to move from the first position to the second position, and within the first guide groove 2312, the first position can be different from the second position, and the first position and the second position can be located at opposite ends of the first guide groove 2312, but are not limited to this.

[0053] More specifically, the first position can be adjacent to the extension start point of the first guide groove 2312, that is, in the direction of guiding the first guide groove 2312 to the second position, the first layer member 231 has a second end wall that defines the extension start point of the first guide groove 2312. When the probe 261 is at the second position, a part of the conductive pin 262 is accommodated in the first guide groove 2312, and a part of the conductive pin 262 extends in the radial direction of the heating tube 21 at the first position and extends outside the first guide groove 2312, thereby forming a conductive One bent portion of the pin 262 may be formed at a location corresponding to the first position in the first guide groove 2312, and this bent portion may be referred to as the first bent portion. The second end wall may be a backstop portion, and this bent portion may be referred to as the first bent portion. The first bent portion may be in contact with or adjacent to the first bent portion formed in the first guide groove 2312. When the conductive pin 262 is pulled, the first bent portion may stop the first bent portion, thereby preventing the probe 21 from moving.

[0054] In one example, the first position is located outside the first guide groove, and the heating assembly further includes an end cap provided at the upper or lower end of the heater tube, the first position being adjacent to one of the end caps, the end cap adjacent to the first position being referred to as the first end cap, the first position being located between the first layer member and the first end cap, and a portion of the conductive pin extending radially of the heater tube at the first position, such that at least a portion of the conductive pin located outside the first guide groove is bent relative to the conductive pin located in the first guide groove, and the conductive pin forms a bent portion near the first position. The first end cap has an edge whose outer diameter is larger than the outer diameter of the heater tube, and the edge is configured as a backlash prevention portion that can support the bent portion described in this example, thereby preventing the probe from moving when the conductive pin is pulled.

[0055] In one embodiment, the heating assembly 2 includes a fixed tube 232 and a first layer member 231, the fixed tube 232 is disposed on the outer periphery of the first layer member 231, and the fixed tube 232 is provided with the backflow prevention portion, and the backflow prevention portion provided on the fixed tube 232 is referred to as the second backflow prevention portion.

[0056] Based on this embodiment, the second anti-retraction part may include a first through hole 2321 opened in the fixed tube 232, the first through hole 2321 may communicate with the first position and allow the temperature measuring element 26 to pass through, the temperature measuring element 26 may pass through the first through hole 2321 and enter the first guide groove 2312, and then the probe 261 may move along the first guide groove 2312 to the second position. The first through hole 2321 may be located directly opposite the first position.

[0057] 2 and 10 , one bent portion of the conductive pin 262 may be a second bent portion 2621, and at least a portion of the second bent portion 2621 may be located within the first through-hole 2321. In this embodiment, the second bent portion 262 may be formed when the first through-hole 2321 and the first guide groove 2312 are not aligned with each other while the conductive pin 262 is passing through the first through-hole 2321, or may be formed before the conductive pin 262 passes through the first through-hole 2321.

[0058] In one example, the second bent portion 2621 is provided in the first through-hole 2321 so as to be suspended in the air in the initial state, and therefore does not come into contact with the wall of the first through-hole 2321. When the conductive pin 262 is pulled, the second bent portion 2621 is deformed. For example, when the conductive pin 262 is pulled, the second bent portion 2621 is deformed so that the degree of bending decreases, and the second bent portion 2621 extends. At this time, the pulling force on the probe 262 by the conductive pin 262 is smaller than the pulling force received by the conductive pin 262. By continuing to pull the conductive pin 262, When the second bent portion 2621 is extended until it contacts the wall of the first through hole 2321, the wall of the first through hole 2321 can provide an acting force to support the second bent portion 2621, and since the component of this acting force in the opposite direction to the tensile force received by the conductive pin 262 and the component in the direction perpendicular to the tensile force received by the conductive pin 262 are both smaller than the tensile force received by the conductive pin 262, the tensile force on the probe 261 by the conductive pin 262 can be reduced, which helps to prevent the probe 261 from shifting from the second position.

[0059] In one example, the second bent portion 2621 is in contact with at least a portion of the wall of the first through hole 2321 in an initial state, so that when the conductive pin 262 is pulled, the wall of the first through hole 2321 can provide a force supporting the second bent portion 2621, which can reduce the pulling force of the conductive pin 262 on the probe 261. Specifically, the second bent portion 2621 provides a first step in the conductive pin 262, and the first through hole 2321 supports the first step, thereby preventing the second bent portion 2621 from coming out of the first through hole 2321 and further preventing the probe 261 from moving from the second position to the first position.

[0060] 2 and 3, as the probe 261 of the temperature measuring element 26 moves along the second guide groove 2312 to the second position, a portion of the conductive pin 262 of the temperature measuring element 26 passes through the first through hole 2321 and is further positioned within the second guide groove 2312, and a portion of the conductive pin 262 is positioned outside the fixed tube 232. The fixed tube 232 can shield the outer periphery at the second position, thereby shielding the probe 261 of the temperature measuring element 26 and positioning the probe 261 between the heating tube 21 and the fixed tube 232. This allows the fixed tube 232 to block contact between the probe 261 and components other than the heating assembly 2 during subsequent assembly or processing of the heating assembly 2, thereby protecting the probe 261 and preventing displacement of the probe 261.

[0061] Therefore, after completing the arrangement of the heating tube 21, the first layered member 231 and the fixed tube 232, the probe 261 can be passed through the fixed tube 232 via the first through hole 2321 and moved from the first position to the shielded second position via the first guide groove 2312.

[0062] In one example, because the thickness of the probe 261 in the radial direction of the heating tube 21 is greater than the thickness D of the first layered member 231, the probe 261 can protrude out of the second guide groove 2312 in the radial direction of the heating tube 21, so that the probe 261 directly contacts the fixed tube 232 and can be directly pressed inward in the radial direction of the heating tube 21 by the fixed tube 232, and the radius of the fixed tube 232 (e.g., the inner radius of the fixed tube) may be greater than or equal to the sum of the radius of the heating tube 21 (e.g., the outer radius of the heating tube 21) and the thickness of the probe 261 in the radial direction of the heating tube 21. In order to easily move the probe 261 from the first position to the second position, the inner radius of the fixed tube 232 is preferably greater than the sum of the outer radius of the heating tube 21 and the thickness of the probe in the radial direction of the heating tube 21.

[0063] 2, 3 and 5, the heating assembly 2 further includes an electrical connection member 22 electrically connected to the heating tube 21, and the electrical connection member 22 is electrically connected to the heating tube 21, such that an induction coil, an electric heating element 213, or a conductive ceramic substrate 212 disposed in the heating tube 21 is electrically connected to the electrical connection member 22. The electrical connection member 22 may be electrically connected to the power supply assembly 3 via a conductor 25 or other conductive element, or may be electrically connected directly to the power supply assembly 3.

[0064] At least a portion of the electrical connection member 22 is arranged between the heating pipe 21 and the fixed pipe 232, and the electrical connection member 22 abuts against the fixed pipe 232 to provide a clamping force to clamp the fixed pipe 232, and the fixed pipe 232 is configured to press the probe 261 inward in the radial direction of the heating pipe 21 under the action of the clamping force, thereby closely adhering the probe 261 to the second position of the heating pipe 21.

[0065] Based on this, in order to easily move the probe 261 along the first guide groove 2312 to the second position, in the process of assembling the heating assembly 2, the temperature measuring element 26 is first assembled, and when the probe 261 is pressed to the second position, at least a portion of the electrical connecting member 22 is further inserted between the heating tube 21 and the fixed tube 232, so that the electrical connecting member 24 is abutted against the heating tube 21 and the fixed tube 232 on opposite sides, respectively, and the fixed tube 232 can be tightened, and the tightened fixed tube 232 is tightened to press the probe 261 inward, so that the probe 261 is tightly attached to the second position of the heating tube 21.

[0066] The thickness of the electrical connection member 22 in the radial direction of the heating pipe 21 is greater than the thickness of the probe 261 in the radial direction of the heating pipe 21, or the electrical connection member 22 includes a main body portion that electrically abuts against the heating pipe 21 and an abutting portion 222 that extends from the main body portion 221 in the radial direction of the heating pipe 21, the abutting portion 222 abutting against the fixed pipe 232, and the extending length L of the abutting portion 222 in the radial direction of the heating pipe 21 is greater than the thickness of the probe 261. This allows the electrical connection member 22 to provide a tightening force that tightens the fixed pipe 232.

[0067] The abutment portion 222 may include a first abutment portion 2221 and a second abutment portion 2222 provided on opposite sides of the main body portion 221, i.e., the first abutment portion 2221 and the second abutment portion 2222 are spaced apart from each other, and the multiple abutment portions 222 abut against different positions on the fixed tube 232, which is advantageous in preventing stress concentration on the fixed tube 232 and in preventing the abutment portions 222 from breaking, cracking, or damaging the fixed tube 232.

[0068] 3 and 4, in order to prevent the abutting portion 222 from damaging or destroying the fixed pipe 232, the abutting portion 222 has a smooth abutting surface, through which the abutting portion 222 abuts against the inner wall of the fixed pipe 232. A smooth abutting surface means that the abutting surface is a smooth plane or a smooth arc surface, and the smooth abutting surface does not have burrs or sharp edges, and the connecting angle between the abutting surface and its adjacent surface may be a fillet.

[0069] Referring to Figures 3 and 4, the main body portion 221 abuts against the heating pipe 21, and the abutment portion 222 and the main body portion 221 may be integrally formed. Specifically, the abutment portion 222 may be formed by extending from the main body portion 221 in the radial direction of the heating pipe 21.

[0070] Referring to FIG. 4 , the abutment portion 222 may be configured to have a turn in the radial direction of the heating pipe 21, and a smooth arc-shaped curved surface is formed at the turn of the abutment portion, and the abutment surface is formed at the turn of the abutment portion 222, that is, at least a part of the arc-shaped curved surface is configured as the abutment surface of the abutment portion 222.

[0071] On the one hand, by folding back the abutment portion 222, the strength of the abutment portion 222 can be increased and deformation of the abutment portion 222 can be prevented when it abuts against the fixed tube 232; on the other hand, by folding back the abutment portion 222, the abutment area between the abutment portion 222 and the fixed tube 232 can be increased, which helps to protect the fixed tube 232; and since the thickness of the metal piece used to make the electrical connection member 22 is 5 mm or less, the cost of folding back the abutment portion 222 to form a smooth abutment surface with a large area is the lowest and the process is the simplest.

[0072] To ensure that the fixed tube 232 can press the probe 261 inward, the projections of the electrical connection member 22 and the probe 261 at the upper or lower end of the heating tube 21 do not overlap, thereby preventing the electrical connection member 22 from affecting the force with which the fixed tube 232 presses the temperature measuring element 26 or the probe.

[0073] More specifically, the heating assembly 2 further includes a clamping space 24 provided between the heating pipe 21 and the fixed pipe 232, at least a portion of the electrical connection member 22 is accommodated in the clamping space 24, and the electrical connection member 22 and the heating pipe 21 abut within the clamping space 24, achieving electrical connection through this abutment. The clamping space 24 has an entrance through which at least a portion of the electrical connection member 22 enters; for example, the upper and / or lower ends of the clamping space 24 are open, and the entrance is formed in the open portion. Therefore, in the process of forming the heating assembly 2, the heating tube 21 and the fixed tube 232 are first assembled together to form a clamping space 24 between the fixed tube 232 and the heating tube 21, and then at least a portion of the electrical connection member 22 is inserted into the clamping space 24 through the inlet thereof, so that at least a portion of the electrical connection member 22 is held within the clamping space 24, and the fixed tube 232 presses against the electrical connection member 22 to maintain stable electrical contact between the electrical connection member 22 and the heating tube 21. Compared with methods such as welding, this process is simpler and advantageous in terms of improving production efficiency and reducing manufacturing costs.

[0074] Here, the first layer member 231 defines a boundary of a portion of the clamping space 24, and the clamping space 24 can be formed within the area between the heating tube 21 and the fixed tube 232 that is not covered by the first layer member 231.

[0075] In one embodiment, the electrical connection member is configured as a ring surrounding the outer surface of the heating tube or as a tube fitted to the outer surface of the heating tube, such that the upper and / or lower edge of the first layer member defines a boundary of a portion of the clamping space.

[0076] 3 and 4, the first layer member 231 is provided with a second guide groove 2311 that communicates from the first layer member 231 to the inlet. The extending direction of the second guide groove 2311 may be substantially parallel to the axial direction of the heating tube 21. As shown in FIG. 3, the second guide groove 2311 may extend from the upper end of the first layer member 231 to the lower end of the first layer member 231, penetrating both the upper and lower ends of the first layer member 231. Alternatively, as shown in FIG. 4, the second guide groove 231 may extend from the upper end or the lower end of the first layer member 231, and the extending length in the axial direction of the heating tube 21 may be shorter than the extending length of the first layer member 231 in the axial direction of the heating tube 21.

[0077] The second guide groove 2311 includes a first guide wall and a second guide wall arranged opposite each other, and the electrical connection member 22 located in the clamping space 24 is accommodated between the first guide wall and the second guide wall, and after entering the clamping space 24 from the entrance of the clamping space 24, the electrical connection member penetrates further into the clamping space 24 along the direction defined by the first guide wall and the second guide wall.

[0078] In one example, the first guide wall and the second guide wall can sandwich the electrical connection member 22 , which is advantageous for holding the electrical connection member 22 within the sandwiching space 24 .

[0079] In one example, see FIG. 5 , the electrical connection member 22 includes a main body 221 and a first abutment portion 2221 and a second abutment portion 2222, both of which extend radially of the heating pipe 21. The main body 221 is used to electrically abut the heating pipe 21, and the first abutment portion 2221 and the second abutment portion 2222 are located on opposite sides of the main body 221 and are respectively provided facing the first guide wall and the second guide wall. As the electrical connection member 22 penetrates deeper into the clamping space 24, the first contact portion 2221 and the second contact portion 2222 can slidably contact the first guide wall and the second guide wall, respectively. The engagement of the first contact portion 2221 and the second contact portion 2222 with the first guide wall and the second guide wall helps to standardize the trajectory of the electrical connection member 22 as it penetrates deeper into the clamping space 24. This is advantageous in preventing a part of the electrical connection member 22 from being trapped between the first layer member 231 and the heating tube 21 due to an unexpected deviation in the trajectory as the electrical connection member 22 penetrates deeper into the clamping space 24, which would affect the stable connection between the first layer member 231 and the heating tube 21. This is also advantageous in improving the efficiency of assembling the electrical connection member 22 into the clamping space 24.

[0080] In one example, in order to reduce the resistance force encountered when the electrical connection member 22 penetrates deeper into the clamping space 24 along the direction defined by the first guide wall and the second guide wall, the electrical connection member 22 is fitted into the first guide wall and / or the second guide wall within the clamping space 24 with a clearance.

[0081] 5 , the electrical connection member 22 may further include a hook portion 223. The hook portion 223 can prevent the electrical connection member 22 from moving along the clamping space 24 or limit the amount of displacement of the electrical connection member 22 along the clamping space 24. For example, when a portion of the electrical connection member 22 is housed within the clamping space 24, during the process of electrically connecting the electrical connection member 22 to the power supply assembly 3, the electrical connection member 22 is usually pulled, or the conductor 25 or other conductive element electrically connected to the electrical connection member 22 is pulled. At this time, the hook portion 223 is stopped or hooked by another member or structural member other than the hook portion 223 in the heating assembly 2, so the electrical connection member 22 cannot move along the clamping space 24 in the pulling direction. As a result, the hook portion 223 helps to hold the electrical connection member 22 in a predetermined position or limit the amount of displacement of the electrical connection member 22 along the clamping space 24, which is advantageous for preventing a short circuit of the heating assembly 2 or ensuring the normal operation of the heating assembly 2.

[0082] In one embodiment, the hook portion 223 can help position the electrical connection member 22 and serve to couple the electrical connection member 22 to the heating tube 21 at a predetermined position or to accommodate the electrical connection member 22 in the clamping space 24. Referring to FIG. 4 , since at least a portion of the clamping space 24 is shielded by the fixed tube 232, the hook portion 223 is secured outside the clamping space 24 to easily position the electrical connection member 22. This makes it possible to prevent the electrical connection member 22 from being improperly positioned in the clamping space 24 or from entering the clamping space 24 excessively by the hook portion 223.

[0083] In one embodiment, the hook portion 223 is hooked onto the heating tube 21 or the fixed tube 232, and by hooking the hook portion 223 onto the heating tube 21 or the fixed tube 232, undesired movement of the hook portion 223 along the clamping space 24 is prevented.

[0084] 2 and 5 , the hook portion 223 may be integrally formed with the main body 221 and may extend from the main body 221. The hook portion 223 may include a first member 2231 extending in the radial direction of the heating tube 21, whereby the first member 2231 may form a right-angled hook perpendicular to the axial direction of the heating tube 21, or may form an acute-angled hook inclined to the axial direction of the heating tube 21. The heating tube 21 or the fixed tube 232 abuts against the first member 2231, and the first member 2231 is hooked onto the heating tube 21 or the fixed tube 232. The heating tube 21 or the fixed tube 232 can support the first member 2231 in the direction opposite to the direction in which the electrical connection member 22 enters the clamping space 24, thereby preventing the electrical connection member 22 from moving further along the clamping space 24 after entering the clamping space 24 to a certain depth.

[0085] 2 and 5, the hook portion 223 further includes a second member 2232 bent relative to the first member 2231, the heating pipe 21 or the fixed pipe 232 being positioned between the second member 2232 and the main body portion 221, and the second member 2232 extending in the axial direction of the heating pipe 21 and can be hooked onto the heating pipe 21 or the fixed pipe 232. The second member 2232 can prevent the first member 2231 from moving toward the heating pipe 21 in the radial direction of the heating pipe 21, thereby ensuring that the first member 2231 abuts against and is stopped by the heating pipe 21 or the fixed pipe 232. It should be noted that the second member 2232 is not essential but is optional.

[0086] Referring to FIG. 2, the hook portion 223 may be provided adjacent to the entrance of the clamping space 24, or may be stopped at the entrance of the clamping space 24, i.e., the first member 2231 can be stopped and supported at at least a portion of the boundary of the entrance of the clamping space 24.

[0087] In one embodiment, the entrance of the clamping space is completely defined by the fixed pipe, i.e., a through hole may be opened in the wall of the fixed pipe, and the through hole may be such that a part of the electrical connection member can pass through, i.e., the through hole can form the entrance of the clamping space.

[0088] 2 , in one embodiment, the inlet of the clamping space 24 is formed at the end of the fixed pipe 232, and the end of the fixed pipe 232 and the heating pipe 21 each define a portion of the inlet of the clamping space 24. The heating assembly 2 may have one or more electrical connection members 22, and accordingly, the heating assembly 2 may have one or more clamping spaces 24. If the inlet of one of the clamping spaces 24 is located at the upper end of the fixed pipe 232, the upper end of the fixed pipe 232 or the upper end of the heating pipe 21 can support the hook 223 upward, while the conductive wire 25 electrically connected to the electrical connection member 22 can pass through the lower end of the clamping space 24. This prevents the electrical connection member 22 from being pulled downward due to the action of the hook 223 being stopped when the conductive wire 25 is pulled downward, thereby ensuring that the electrical connection member 22 can be stably held in its original position when the conductive wire 25 is pulled downward.

[0089] 9 , the heating assembly 2 further includes an end cap 27. The end cap 27 is connected to the heating pipe 21, and may be connected to the upper end of the heating pipe 21 or the lower end of the heating pipe 21. There may be two end caps 27, each connected to the upper end and the lower end of the heating pipe 21. The hook portion 223 is hooked onto the end cap 27, and the end cap 27 stops and supports the hook portion 223 in the direction opposite to the direction in which the electrical connection member 22 enters the clamping space 24.

[0090] Alternatively, in other embodiments, the heating assembly may be provided with a bracket separate from the end cap and fixed tube, and the hook portion is hooked to the bracket to be secured and supported, thereby preventing the electrical connection member from moving along the clamping space.

[0091] The first layer member 231 can be first placed on the outer periphery of the heating tube 21 together with the fixed tube 232, which not only helps to expose the first position and the second position on the outer surface of the heating tube 21 in the first guide groove 2312, but also ensures that the first layer member 231 forms a stop near the second position, thereby ensuring that the probe 261 moving along the first guide groove 2312 can accurately reach the second position.

[0092] In order to easily fit the fixed tube 232 onto the outer periphery of the first layer member 231, the inner diameter of the fixed tube 232 can be made equal to or larger than the outer diameter of the first layer member 231, or the fixed tube 232 can be made elastic.

[0093] When the fixed tube 232 is tightened by contact with the electrical connection member 22, at least a portion of the first layered member 231 can be tightly attached to the heating tube 21, and the fixed tube 232 can prevent the first layered member 231 from rotating relative to the heating tube 21.

[0094] The first layer member 231 may include a thermal insulation layer made of a thermal insulation material. The thermal insulation material may include a thermal insulating material, which refers to a material having a thermal conductivity of less than 100 W / mK, preferably less than 40 W / mK or less than 10 W / mK at 23°C and 50% relative humidity. For example, the thermal insulating material may be made of at least one of a PAEK material, a PI material, or a PBI material, where the PAEK material includes PEEK, PEKK, PEKEKK, or PEK material.

[0095] To facilitate the thermal insulation material being disposed around the surface of the heating tube 21, the thermal insulation material may include a flexible thermal insulation material. For example, the thermal insulation material may include at least one of insulating silica gel, ceramic fiber cloth, and aerogel. In one embodiment provided herein, the thermal insulation material is primarily composed of SiO2 aerogel particles. The SiO2 aerogel particles are a three-dimensional nanostructured silica material with a high porosity of 80-99.8%, pore sizes ranging from 10-50 nm, and air hardly conducting heat within the pores. The thermal conductivity at room temperature is as low as 0.01 W / (mK), resulting in very low thermal conductivity. The flexible thermal insulation layer made of SiO2 aerogel particles provides excellent thermal insulation and insulation.

[0096] The thermal insulation layer made of the above-mentioned SiO2 aerogel particles is combined with a polymer material through a special process to form a flexible thermal insulation layer, where the weight percent content of the SiO2 aerogel particles is greater than the weight percent content of the polymer material. The polymer material includes at least one of PU (polyurethane), PTEE (polytetrafluoroethylene), melamine foam, and polymeric resin. In one example provided in the present application, the thermal insulation material includes PU and SiO2 aerogel particles, and the weight percent content of PU is 10% and the weight percent content of the SiO2 aerogel particles is 90%. The thermal conductivity of the thermal insulation layer made using the above-mentioned thermal insulation material is in the range of 0.01 to 0.02 W / mK. In yet another example provided in the present application, the thermal insulation material includes a polymeric resin and SiO2 aerogel particles, and the mass percent content of the polymeric resin ranges from 1% to 30% and the mass percent content of the SiO2 aerogel particles ranges from 1% to 99% by weight, and the thermal conductivity of the thermal insulation layer made using the thermal insulation material ranges from 0.02 to 0.026 W / mK.

[0097] The thermal insulation material is stretched and cut into a sheet having appropriate dimensions. In the embodiment provided herein, the sheet is flexible and can be wrapped around the outer periphery of the heating pipe 21 to form a thermal insulation layer with thermal insulation effects, which is simple and easy to operate. In another optional implementation, the thermal insulation material can be stretched to form a curled or tubular thermal insulation layer, which has a certain stretchability and can be directly fitted around the outer periphery of the heating pipe 21.

[0098] The heat-insulating layer can be provided in one or more layers depending on the required heat-insulating effect. In one embodiment, the heat-insulating layer is provided in a single layer, thereby preventing gaps from forming between the layers and preventing heat loss. The thickness of the heat-insulating layer provided on the outer surface of the heating pipe 21 ranges from approximately 0.5 mm to 2 mm, and it is understood that the thicker the heat-insulating layer, the greater the heat-insulating effect provided by the heat-insulating layer. The thickness of the heat-insulating layer provided on the outer surface of the heating pipe 21 can be selected from any value between 0.5 mm and 2 mm depending on the required heat-insulating effect.

[0099] The thermal insulation layer surrounds the heating pipe 21 circumferentially. In one embodiment, the thermal insulation layer is wrapped around the heating pipe 21 to enclose most of the outer surface of the heating pipe 21. Because the thermal insulation layer is configured as a sheet, after a single layer is wrapped around the outer surface of the heating pipe 21, it must be fixed so that it can be maintained on the outer surface of the heating pipe 21. For ease of handling, an adhesive may be applied to the surface of the thermal insulation layer facing the heating pipe 21, and the thermal insulation layer is adhered to the outer surface of the heating pipe 21 via the adhesive. When the thermal insulation layer is configured in multiple layers, adhesive can be used to adhere the thermal insulation layer to the outer surface of the heating pipe 21 and between adjacent thermal insulation layers. It should be noted that the thermal insulation layer can also be fixed to the heating pipe 21 by other methods; these methods are not listed individually in this application.

[0100] The fixed tube 232 in any of the above embodiments can be made of heat-resistant PEEK (polyether ether ketone) material, and in a preferred embodiment provided in the present application, the fixed tube 232 may be a PI (polyimide) tube, which is a thin-walled tube formed by stretching a polymetaphenylene dicarbonimide thin film. Its thin thickness and light fabric make it advantageous for designing the entire heating assembly to be compact and lightweight.

[0101] In one embodiment, referring to FIG. 10, the heating assembly further includes an end cap 27 connected to the end of the heating tube 21, and the end cap 27 has a backstop, which is referred to as a third backstop.

[0102] Specifically, the anti-retraction portion may include a second through-hole formed in the end cap 27, the conductive pin 262 passing through the second through-hole, and the conductive pin 262 having a bend near the second through-hole, referred to as a third bend 2622. The third bend 2622 is located between the second through-hole and the probe 261, and the second through-hole is configured to block the third bend 2622 from passing through, thereby preventing the probe 261 from being displaced when the conductive pin 262 is pulled.

[0103] The third fold 2622 is disposed adjacent to the end cap 27, where "adjacent" includes contacting or close without contacting.

[0104] In one example, due to the third bend 2622, the conductive pin 262 has a second step, and the end cap 27 defining the second through hole supports the second step, and the second step is supported by contacting the end cap 27 defining the second through hole. Therefore, when the conductive pin 262 is pulled to one side of the second through hole, the conductive pin 262 located on the other side of the second through hole is hardly displaced, that is, the second through hole can prevent the conductive pin 262 from retracting and the probe 261 from shifting from the second position.

[0105] In one example, the third bend 2622 is located adjacent to the second through hole, but has a predetermined amount of space between it and the second through hole, so that when the conductive pin 262 is pulled, the third bend 2622 can deform and reduce its degree of bending, thereby providing the conductive pin 262 with a redundant amount of retraction, so that the portion of the conductive pin 262 away from the probe 261 can retract, but the portion adjacent to the probe 261 can basically remain stationary, and further, when the conductive pin 262 is pulled, the position of the probe 261 can be maintained unchanged.

[0106] Therefore, in the process of connecting the conductive pin 262 to the control board 31, when the conductive pin 262 is pulled, the third bend 2622 can prevent the probe 261 of the temperature measuring element 26 from shifting from the second position.

[0107] In one embodiment, the conductive pin 262 can simultaneously have the first bend and at least one of the second bend 2621 and the third bend 2622. In one embodiment, the first bend and the second bend 2621 can be integrated into one piece. In one embodiment, the conductive pin 262 can further have another bend different from the first bend, the second bend 2621, and the third bend 2622, and the other bend can also be used to prevent the temperature measuring element 26 from moving along the first guide groove 2311.

[0108] In one embodiment, the anti-retraction part includes a first anti-retraction part and a second anti-retraction part, the conductive pin 262 is connected to the first anti-retraction part and the second anti-retraction part, and the geometric connection line between the first anti-retraction part and the second anti-retraction part is inclined with respect to the axial direction of the heating tube 21. For example, the first through hole 2321 and the second through hole are the first anti-retraction part and the second anti-retraction part, respectively, and the geometric connection line between the first through hole 2321 and the second through hole is inclined with respect to the axial direction of the heating tube 21, which further prevents the probe 261 from shifting from the second position when the conductive pin 262 is pulled.

[0109] In one embodiment, a portion of the conductive pin 262 is wound in a helical structure similar to a spring, so that when the conductive pin 262 is pulled, the helical structure can provide an extension margin to reduce the pulling force on the probe 261.

[0110] 3 and 4 , the electrical connection member 22 includes a main body 221 and an abutting portion 222 extending from the main body 221 in a radial direction of the heating tube 21, and further includes a conductive wire 25, where the main body 221 electrically abuts the heating tube 21 and the abutting portion 222 abuts the fixed tube 232. Under the action of the abutting portion 222, a gap is formed between the main body 221 and the fixed tube 232, and the conductive wire 25 is electrically connected to the main body 221 and at least a portion of the conductive wire 25 is housed in the gap between the fixed tube 232 and the main body 221, and the main body 221 is electrically connected to the power supply assembly 3 via the conductive wire 25.

[0111] 4, the main body 221 may include an elastic piece 2212 and a connecting portion 2211 electrically connected to the conductive wire 25. The conductive wire 25 may be electrically connected to the connecting portion 2211 by welding. The main body 221 elastically contacts the heating pipe 21 via the elastic piece 2212, thereby ensuring a stable electrical connection between the main body 221 and the heating pipe 21. In the example shown in FIG. 4, the elastic piece 2212 includes an elastic arm A configured in a V-shape and an electrical contact B provided at a V-shaped corner of the elastic arm A. The electrical contact B protrudes toward the heating pipe 21, and the elastic arm A provides an elastic force that electrically contacts the electrical contact B with the heating pipe 21.

[0112] In one embodiment, the heating tube 21 has only one induction coil or electric heating element 213, and therefore may have at least two electrical connection members 22, one a positive electrical connection member and the other a negative electrical connection member. The positive and negative electrical connection members are electrically connected to opposite ends of the induction coil or electric heating element 213, respectively. Based on this, in one example, the first layer member 231 has two second guide grooves 2311 that are independent of each other and do not communicate with each other, and the positive and negative electrical connection members are respectively disposed in different second guide grooves 2311. In another example, the first layer member 231 has second guide grooves 2311 that penetrate the upper and lower ends of the first layer member 231, and the positive and negative electrical connection members are inserted into the second guide groove 2311 from top to bottom and bottom to top, respectively, and are located on the upper and lower sides of the second guide groove 2311, respectively.

[0113] In one embodiment, see Figures 3, 7 and 8, there are multiple induction coils or electric heating elements 213 in the heating tube 21, and therefore there may be at least three electrical connecting members 22, of which one electrical connecting member 22 may be a common electrical connecting member that can be electrically connected to multiple induction coils or electric heating elements 213 at the same time, and the other electrical connecting members 22 are electrically connected to the multiple induction coils or electric heating elements 213 one-to-one, and the number of second guide grooves 2311 in the first layer member 231 is less than or equal to the number of electrical connecting members 22. For example, as shown in Figures 3, 7 and 8, the heating tube 21 may have two induction coils or electric heating elements 213 and three electrical connecting members 22. The first layer member 231 may have two second guide grooves 2311, one of which is a long second guide groove that passes through the upper and lower ends of the first layer member 231, and the other is a short second guide groove, the short second guide groove and the long second guide groove are independent of each other, two electrical connecting members 22 are provided on the upper and lower sides of the long second guide groove, respectively, and a common electrical connecting member is provided in the short second guide groove, and the extension length of the short second guide groove in the axial direction of the heating tube 21 is shorter than the extension length of the long second guide groove in the axial direction of the heating tube 21.

[0114] When a first electrical connection member and a second electrical connection member are simultaneously placed in the same first guide groove 2311, and the first electrical connection member is placed above the second electrical connection member, the arrangement of the hook portion 232 on the first electrical connection member causes the first electrical connection member to move further into the clamping space 24 when the conducting wire 25 connected to the first electrical connection member is pulled downward, thereby preventing the first electrical connection member from coming into contact with the second electrical connection member and causing a short circuit.

[0115] When the electric heating element 213 includes a first electric heating element and a second electric heating element arranged above and below, the first electric heating element is electrically connected to the first electrical connecting member, the second electric heating element is electrically connected to the second electrical connecting member, the first electric heating element is located above the second electric heating element, and at least a portion of the first electric heating element and at least a portion of the second electric heating element are simultaneously exposed in the same first guide groove 2311, the arrangement of the hook portion 232 of the first electric connecting member allows the first electric connecting member to enter further into the clamping space 24 when the conducting wire 25 connected to the first electric connecting member is pulled downward, thereby preventing the first electric connecting member from being electrically connected to the first electric heating element and the second electric heating element simultaneously, which would cause abnormal operation of the heating assembly 2.

[0116] In the above-mentioned heating assembly and aerosol generating device, a bent portion is formed in the conductive pin, and the anti-retraction portion can stop the bent portion, so that when the conductive pin is pulled, the anti-retraction portion and the bent portion cooperate to prevent the probe from moving, ensuring that the probe can be maintained in a predetermined temperature measurement position.

[0117] Example 2 An embodiment of the present application further provides an aerosol generating device configured to be powered by electricity. As shown in Fig. 13, the aerosol generating device includes a heating device 4 and a power supply assembly 3, the power supply assembly 3 providing power to the heating device 4, the heating device 4 surrounding the heating device to form a heating cavity with an open end, the aerosol-forming substrate removably housed inside the heating cavity, and the aerosol-forming substrate is baked and heated by the heating device rather than burned, causing some of the components of the aerosol-forming substrate to volatilize and form an aerosol. The aerosol-forming substrate includes a generally rod-shaped cigarette, which contains a tobacco product and satisfies the user's need for nicotine.

[0118] The heating device and the power supply assembly are housed within a housing. The housing may be comprised of a plurality of sub-housings, and the sub-housings may be connected in a separable or non-separable manner. An insertion opening is provided at one end of the housing, and the aerosol-forming substrate is inserted into the heating cavity through the insertion opening.

[0119] The power supply assembly 3 mainly includes a rechargeable lithium-ion battery, and a charging interface is provided at the other end of the housing for charging the battery via an external power source. Furthermore, the power supply assembly 3 typically further includes a control board connected to the heating device, the battery, and other electronic components within the aerosol generating device.

[0120] The aerosol generating device further includes a switch, which can be selected from at least one of a key switch, a touch switch, or an airflow-sensitive switch, and the switch is connected to a control board, and when the switch is turned on, the control board controls the battery assembly to provide power to the heating device.

[0121] The control board of the aerosol-generating device usually further includes an MCU (microcontroller unit) electrically connected to the heating assembly of the heating device, the MCU including a temperature measurement feedback circuit and a temperature control feedback circuit, the temperature measurement feedback circuit including a temperature measurement element located inside the heating device, the temperature measurement element being adjacent to or attached to the heating element inside the heating device, and timely feeding back the temperature of the heating element to the MCU, the MCU further controlling the heating element through the temperature control feedback circuit, so that the heating element heats the aerosol-forming substrate to a predetermined degree with an appropriate heating power, thereby generating a stable and smokable aerosol, thereby satisfying the user's smoking experience. Here, a smokable aerosol can be defined as an aerosol generated by the aerosol-forming substrate having an appropriate temperature during the process of a user smoking a cigarette, and the temperature remaining essentially unchanged throughout the entire process. Even if the user stops smoking while smoking, when the aerosol generating device is activated again, the aerosol generating device can control the heating device to heat with appropriate heating power, so that the aerosol formed by heating the heating device maintains approximately the same mouthfeel and smoking temperature, further improving the user experience.

[0122] The core element of the heating device 4 is a heating assembly. In one embodiment of the present application, the heating assembly is configured as a circumferential heating assembly. That is, the heating assembly surrounds and forms a heating cavity 41, at least a portion of which is used to accommodate the aerosol-forming substrate, and the heating element of the heating assembly surrounds and heats the aerosol-forming substrate. The circumferential heating assembly may include one or more of an infrared heating assembly, a resistance heating tube assembly, and an electromagnetic induction heating tube assembly. In an optional embodiment, a central heating element may be disposed inside the heating cavity of the circumferential heating assembly to enhance the heating effect. The resistance heating tube and the electromagnetic induction heating tube may be configured in any form known in the art and are not specifically limited in the present application.

[0123] One embodiment of the present application provides an infrared heating assembly 5. Referring to Figure 14, the infrared heating assembly 5 includes an infrared heating element 51 including a base, the base being configured as a generally hollow tubular structure, with an internal cavity of the base defining and forming a heating cavity 41, at least a portion of which is used to accommodate an aerosol-forming substrate. In another alternative embodiment, the base may be configured as a hollow prismatic structure, with the dimensions of the internal cavity of the base being configured to facilitate insertion and removal of the aerosol-forming substrate.

[0124] The substrate of the infrared heating element 51 is made of a material with high infrared transmittance, and in a preferred embodiment, the heat-resistant material has an infrared transmittance of 95% or more. Suitable heat-resistant materials can be selected from materials such as quartz glass, ceramic, or mica, and in one example provided in this application, the substrate is made of a transparent quartz glass material.

[0125] The infrared heating element 51 further includes an infrared electric heating coating 511 formed on the surface of the substrate, which may be formed on the outer surface or the inner surface of the substrate. The infrared electric heating coating 511 generates heat under power supply conditions and also generates infrared rays with a certain wavelength, which is generally in the range of 8 μm to 15 μm. When the infrared wavelength matches the absorption wavelength of the aerosol-forming substrate, the aerosol-forming substrate absorbs the infrared rays, causing the molecules and atoms within it to resonate and generate intense vibrations and rotations. The vibrations and rotations increase the temperature of the aerosol-forming substrate, achieving the heating effect.

[0126] In one embodiment provided herein, referring to FIG. 17 , an infrared coating is formed on the outer surface of a substrate, the outer surface of the substrate including an infrared electrothermal coating region 21 and a non-infrared electrothermal coating region, where the non-infrared coating is configured as a conductive coating, which may be a metal coating or conductive tape, etc. The metal coating may include silver, gold, palladium, platinum, copper, nickel, molybdenum, tungsten, niobium, or an alloy material of the above metals. The conductive coating is configured as a conductive cloth 512 of the infrared heating assembly 5. In one example provided herein, the infrared heating assembly 5 includes two symmetrically arranged conductive coating regions, with the infrared coating region extending between the two conductive coating regions. The two conductive coating regions correspond to the first and second conductive portions of the infrared heating assembly 5, respectively, and at least a portion of both of the two conductive coatings is electrically connected to the infrared electrothermal coating, allowing current to flow from the first conductive portion to the second conductive portion via the infrared coating.

[0127] The infrared heating assembly 5 further includes an electrical connection member 52, which is used to connect the conductive portion of the infrared heating element 51 and the power supply assembly. In one example provided in the present application, the electrical connection member 52 includes a first electrical connection member 521 conductively connected to the first conductive portion of the infrared heating element 51 and a second electrical connection member 522 conductively connected to the second conductive portion of the infrared heating element 51.

[0128] 18, in an example provided herein, the electrical connection member 52 is configured as a substantially elastic metal piece. The electrical connection member 52 includes a main body 523, conductive contact pieces 524, and an extension 525. The main body 523 is surrounded by four cantilevers to form a hollow rectangular plate. The conductive contact pieces 524 are bent toward the conductive coating area of the infrared heating element 51 and maintain electrical contact with the first and second conductive parts of the infrared heating element 51. Referring to FIG. 18, in an example provided herein, three conductive contact pieces 524 are connected to the inside of the main body 523, two of which are located on the same side of the main body, and the other conductive contact piece 524 is located on the other side of the main body 523. By configuring the conductive contact piece 524 as a locking claw structure, a stable electrical connection is formed between the conductive contact piece 524 of the electrical connection member 52 and the conductive cloth 512 of the infrared heating element 51, which effectively prevents the problem of unstable electrical connection between a general electrical connection member 52 and the conductive part of the infrared heating element 51. In another optional example, the electrical connection member 52 may also be configured as a welding wire or in other forms.

[0129] The infrared heating assembly 5 further includes a temperature measuring element 53 for detecting the temperature of the infrared heating element 51. In one example provided herein, the temperature measuring element 53 is configured as a thermistor temperature measuring device, where the thermistor includes a thermistor core and two conductive pins respectively connected to two electrodes of the thermistor chip. The thermistor chip and at least a portion of the two conductive pins are enclosed within a housing to form the thermistor temperature measuring device. The two conductive pins are electrically connected to a control board of the power supply assembly to transmit temperature information to the control board of the power supply assembly. The control board further controls the amount of power provided from the battery to the infrared heating element 51 based on the real-time temperature information of the infrared heating element 51 measured by the thermistor temperature measuring device.

[0130] The temperature of the outer surface of the tubular infrared heating element 51 varies with position, for example, the temperature at the two ends of the tubular infrared heating element 51 is lower than the temperature at the middle position of the tubular base. Therefore, when the position of the thermistor temperature measuring device fixed on the outer surface of the infrared heating element 51 changes, the temperature measured by the thermistor temperature measuring device changes. Therefore, fixing the thermistor temperature measuring device at a specific position relative to the infrared heating element 51 is extremely important for the temperature measurement effect of the thermistor temperature measuring device.

[0131] In a circumferential heating type heating assembly, the temperature measuring element 53 is usually fixed to the outer surface and / or inner surface of the infrared heating element 51 and is configured to maintain a constant position relative to the infrared heating element 51, so that the temperature measuring element 53 can accurately collect the heating temperature of the infrared heating element 51 while the infrared heating element 51 is heating. In one embodiment provided in the present application, the temperature measuring element 53 is fixed to the outer surface of the infrared heating element 51, and in order to easily fix the temperature measuring element 53, the heating assembly 300 further includes a support member 54 having a clamping structure, and the temperature measuring element 53 is fixed by the clamping structure, so that the positions of the temperature measuring element 53 and the infrared heating element 51 are stably maintained.

[0132] In order to prevent the support member from absorbing the heat generated by the infrared heating element 51, in one embodiment provided in the present application, the support member 54 includes a layer member 541 configured to surround a portion of the length of the tubular infrared heating element 51, and the layer member 541 is made of a heat-insulating material, so that the heat generated by the infrared heating element 51 is enveloped by the layer member 541, and further, the heat generated by the infrared heating element 51 can be prevented from diffusing outward.

[0133] The heat-insulating material includes at least one of insulating silica gel, ceramic fiber cloth, and aerogel. In one embodiment provided in the present application, the main component of the heat-insulating material used to make the layered member 541 is SiO2 aerogel particles, where the SiO2 aerogel particles are a silica material with a three-dimensional mesh nanostructure, a high porosity of 80-99.8%, a pore size range of 10-50 nm, and air hardly conducting heat within the pores. The thermal conductivity at room temperature is as low as 0.01 W / (mK), and therefore the thermal conductivity is very low. Therefore, the flexible layered member 541 made of SiO2 aerogel particles has excellent heat-insulating properties.

[0134] The thermal insulation material employs SiO2 aerogel particles, which are compounded with a polymer material through a special process to form a flexible layer member 541, where the weight percent content of the SiO2 aerogel particles is greater than the weight percent content of the polymer material. The polymer material includes at least one of PU (polyurethane), PTEE (polytetrafluoroethylene), melamine foam, and polymeric resin. In one example provided herein, the layer member 541 includes PU and SiO2 aerogel particles, where the weight percent content of PU is 10% and the weight percent content of the SiO2 aerogel particles is 90%. The thermal conductivity of the layer member 541 made using the thermal insulation material is in the range of 0.01-0.02 W / (mK). In yet another example provided in the present application, the layer member 541 includes a polymeric resin and SiO2 aerogel particles, and the mass percent content of the polymeric resin ranges from 1% to 30%, and the mass percent content of the SiO2 aerogel particles ranges from 1% to 99%, in mass percent. The thermal conductivity of the layer member 541 made using the above heat-insulating material ranges from 0.02 to 0.026 W / (mK).

[0135] The thermal insulation material is stretched and cut into a sheet having appropriate dimensions. In the embodiment provided herein, the sheet is flexible and can be wrapped around the infrared heating element 51 to form a layer 541 having thermal insulation properties, which is simple and easy to operate. In another optional implementation, the thermal insulation material can be stretched to form a curled or tubular layer 541, which has a certain stretchability and can be directly fitted around the tubular infrared heating element 51.

[0136] The layer member 541 can be provided in one or more layers depending on the required heat retention effect. In a preferred embodiment, the layer member 541 is provided as a single layer, thereby preventing gaps from forming between the layers and heat loss. The thickness of the layer member 541 provided on the outer surface of the infrared heating element 51 ranges from approximately 0.5 mm to 2 mm, and it is understood that the thicker the layer member 541 provided, the higher the heat retention effect provided by the layer member 541. The thickness of the layer member 541 provided on the outer surface of the infrared heating element 51 can be selected from any value between 0.5 mm and 2 mm depending on the required heat retention effect.

[0137] The layered member 541 surrounds the infrared heating element 51 in the longitudinal direction, and in a preferred embodiment, the layered member 541 is wrapped around most of the outer surface of the infrared heating element 51, while retaining only a portion of the outer surface of the first end of the infrared heating element 51, thereby making it easy to secure the ends of the heating assembly. Because the layered member 541 is configured as a sheet, after a single layer of the layered member 541 is wrapped around the outer surface of the infrared heating element 51, the two free ends of the layered member 541 need to be secured. For ease of handling, the two free ends of the layered member 541 can be secured with high-temperature tape. If the layered member 541 is configured in multiple layers, one free end of the layered member 541 after wrapping can also be secured with high-temperature tape.

[0138] In the embodiment provided in the present application, in order to prevent the layer member 541 from rotating on the outer surface of the tubular infrared heating element 51, the support member 54 further includes a fixed tube 542 fitted around the outer periphery of the layer member 541, and the fixed tube 542 is configured to circumferentially wrap at least a part of the outer surface of the layer member 541. Since the layer member 541 is made of aerogel, its surface friction coefficient is large. Since the outer surface of the layer member 541 is further wrapped by the fixed tube 542, it is difficult for the layer member 541 to rotate on the outer surface of the infrared heating element 51.

[0139] 18, the layer member 541 is provided with an opening 511, the shape of which is substantially the same as that of the temperature measuring element 53, the opening 511 extending from one side of the layer member 541 and terminating at an intermediate position of the layer member 541, and used to accommodate the temperature measuring element 53, the temperature measuring element 53 being disposed within the opening 511 and maintaining contact with the outer surface of the infrared heating element 51. Referring to FIGS. 15 and 18, the temperature measuring element 53 is substantially elongated and rod-shaped, and the opening 511 provided in the layer member 541 is configured in a U-shape corresponding thereto. When the shape of the temperature measuring element 53 changes, the shape of the opening 511 provided in the layer member 541 changes accordingly.

[0140] The layer member 541 can be fixed to the outer periphery of the infrared heating element 51 with high-temperature tape, and the temperature measuring element 53 is accommodated in the opening 511 of the layer member 541, and the temperature measuring element 53 can also be fixed with high-temperature tape. In order to prevent the temperature measuring element 53 from being displaced relative to the infrared heating element 51 due to insufficient fixing, in one embodiment of the present application, the support member 54 further includes a fixing tube 542 fitted to the outer periphery of the layer member 541, and the fixing tube 542 closes the outer opening of the opening 511 in the layer member 541 so that the temperature measuring element 53 is sandwiched between the infrared heating element 51 and the fixing tube 542. The fixed tube 542 is approximately cylindrical, and its longitudinal extension length is approximately the same as the longitudinal extension length of the layered member 541, or the longitudinal extension length of the fixed tube 542 is slightly longer than the longitudinal extension length of the layered member 541, thereby allowing the fixed tube 542 to wrap around the layered member 541 with greater circumferential force.

[0141] The fixed tube 542 can be made of heat-resistant PEEK (polyether ether ketone) material, and in a preferred embodiment provided in the present application, the fixed tube 542 may adopt a PI (polyimide) tube, which is a thin-walled tube formed by stretching a polymetaphenylene dicarbonimide thin film, and its thin thickness and light fabric are advantageous for designing the entire heating assembly to be compact and lightweight.

[0142] After the fixed tube 542 is fitted into the layered member 541, a vertical opening 5411 is provided in the layered member 541, so that an accommodating cavity with a lower end opening 511 is formed between the infrared heating element 51 and the fixed tube 542, and the temperature measuring element 53 can be inserted from the lower end open portion of the accommodating cavity and clamped between the infrared heating element 51 and the fixed tube 542.

[0143] In a preferred implementation, the longitudinal opening 5411 in the layered member 541 ends at a midpoint of the infrared heating element 51, thereby positioning the temperature measurement probe of the temperature measuring element 53 at a midpoint of the infrared heating element 51 and improving the accuracy of the temperature measurement results by the temperature measuring element 53.

[0144] Furthermore, because the lateral opening of opening 511 in layer 541 is blocked by fixing tube 542, it is impossible to directly observe whether temperature measuring element 53 has been correctly installed during the process of installing temperature measuring element 53. To prevent this, as shown in FIG. 20 , fixing tube 542 is provided with fixing hole 5421 corresponding to the end of opening 511 in layer 541. When inserting temperature measuring element 53 from the lower open end of opening 511, the fixing hole 5421 in fixing tube 542 allows the worker to determine whether the temperature measuring probe of temperature measuring element 53 has been correctly installed. When the temperature measuring probe of temperature measuring element 53 is exposed through fixing hole 5421, the worker can determine that temperature measuring element 53 has basically been correctly installed. Furthermore, because the temperature measuring probe of temperature measuring element 53 protrudes from the pulling wire, it can be locked into fixing hole 5421 in fixing tube 542, which is advantageous for fixing temperature measuring element 53.

[0145] The present application further provides an installation method suitable for the heating assembly, including the following steps 1 to 3:

[0146] In step 1, as shown in Figures 21a and 21b, a sheet-like layer member 541 is wrapped around the outer periphery of the infrared heating element 51, and the two free ends of the layer member 541 are fixed with high-temperature tape.

[0147] In step 2, as shown in FIG. 21d, a fixed tube 542 is fitted onto the outer periphery of the layer member 541.

[0148] In step 3, as shown in FIG. 21e, the temperature measuring element 53 is inserted from the open bottom end of the assembly until the temperature measuring element 53 is locked in the fixing hole 5421 of the fixing tube 542.

[0149] In one embodiment provided in the present application, the support member 54 further has a fixing structure for the electrical connection member 52. Referring to Fig. 17, the body 523 of the electrical connection member 52 is substantially hollow plate-shaped, the layer member 541 is provided with a first hole 5412, the body 523 of the electrical connection member 52 is disposed in the first hole 5412, the outer surface of the body 523 of the electrical connection member 52 is attached to the outer surface of the layer member 541, and the plurality of conductive contact pieces of the electrical connection member 52 are bent into the first hole 5412 so that the ends of the conductive contact pieces contact and are electrically connected to the conductive parts of the infrared heating element 51, and the position of the first hole 5412 corresponds to the conductive coating area of the infrared heating element 51, i.e., the conductive parts of the infrared heating element 51.

[0150] In one example provided in the present application, the infrared heating element 51 is symmetrically provided with two conductive coating areas corresponding to the first conductive portion and the second conductive portion of the infrared heating element 51, and the layer member 541 is provided with two first holes 5412, which respectively correspond to the positions of the two conductive coating areas, and two electrical connection members 52 are arranged accordingly, and the two electrical connection members 52 are respectively arranged corresponding to the outer surfaces of the two first holes 5412, and the conductive contact pieces of the two electrical connection members 52 are respectively accommodated in the first holes 5412, and the ends of the conductive contact pieces contact the conductive portions of the infrared heating element 51.

[0151] In a preferred embodiment, as shown in FIG. 17, the main body 523 of the electrical connection member 52 is configured as a bent plate-like structure, which allows the main body 523 of the electrical connection member 52 and the layer member 541 to be stably attached to each other, and the conductive contact pieces provided on the electrical connection member 52 are configured as bent locking claw structures, which allow the conductive contact pieces to form a locking force on the conductive coating of the infrared heating element 51, allowing the electrical connection member 52 to be stably positioned on the layer member 541. Furthermore, three conductive contact pieces 524 are arranged on two opposing inner edges of the main body 523 of the electrical connection member 52, with one conductive contact piece 524 provided on one inner edge of the main body 523 and two conductive contact pieces 524 provided on the other inner edge of the main body 523, one of which is provided at the middle position of the inner edge and the other two conductive contact pieces 524 are provided at two end positions of the other inner edge, thereby stably engaging the three conductive contact pieces 524 with the layer member 541.

[0152] A fixed tube 542 is further fitted onto the outer surface of the layer member 541, so that the main body 523 of the electrical connection member 52 is further sandwiched between the layer member 541 and the fixed tube 542. Therefore, the electrical connection member 52 can be stably fixed, and the conductive contact piece of the electrical connection member 52 and the conductive part of the infrared heating element 51 are stably electrically connected.

[0153] An extension portion 525 is further provided at the lower end of the electrical connection member 52, and the conductor is electrically connected to the extension portion 525. A notch 5413 is further provided on the lower side of the layer member 541, and at least a portion of the extension portion 525 of the electrical connection member 52 and the conductor is housed inside the notch 5413. After the extension portion 525 and the conductor of the electrical connection member 52 are housed inside the notch 5413, the electrical connection member 52 is bonded to almost the outer surface of the layer member 541, making it easy to fit the fixing tube 542.

[0154] In the example provided in the present application, as shown in Figures 18 and 19, the temperature measuring element 53 is fixed between two electrical connection members 52, so that the opening 511 of the layer member 541 is located between the two first holes 5412.

[0155] An embodiment of the present application further provides an installation method suitable for installing the heating assembly, including the following steps 1 to 4, as shown in FIGS. 21a to 21b.

[0156] In step 1, as shown in Figures 21a and 9b, a sheet-like layer member 541 is wrapped around the outer periphery of the infrared heating element 51, and the two free ends of the layer member 541 are fixed with high-temperature tape.

[0157] In step 2, as shown in FIG. 21c, two electrical connection members 52 are placed in correspondence with the two first holes 5412 of the layer member 541, respectively.

[0158] In step 3, as shown in FIG. 21d, a fixed tube 542 is fitted onto the outer periphery of the layer member 541.

[0159] In step 4, as shown in FIG. 21e, the temperature measuring element 53 is inserted from the open bottom end of the assembly until the temperature measuring element 53 is locked in the fixing hole 5421 of the fixing tube 542.

[0160] In the above embodiment, an infrared heating assembly is used as an example to describe in detail the fixing method of the temperature measuring element 53 and the electrical connecting member of the heating assembly. The support member 54 supporting the temperature measuring element 53 and the electrical connecting member 52 includes a layer member 541 with heat retention properties, thereby effectively avoiding the problem of a typical support member 54 absorbing heat generated by the infrared heating element 51. The support member 54 also includes a fixed tube 542, which is made of aerogel material. This provides a large frictional force between the outer surface of the layer member 541 and the fixed tube 542, and between the layer member 541 and the infrared heating element 51, effectively preventing the layer member 541 from rotating and more firmly fixing the temperature measuring element 53 and the electrical connecting member 52. Alternatively, the structure and fixing method of the support member 54 can also be used for tubular resistance heating tubes and electromagnetic induction heating tubes.

[0161] It should be noted that the specification and drawings of this application show preferred embodiments of the present application, but are not limited to the embodiments described in this specification, and that those skilled in the art may make improvements and modifications based on the above description, and all such improvements and modifications shall fall within the scope of protection of the appended claims of this application. [Explanation of symbols]

[0162] 1. Aerosol-generating products 2 Heating Assembly 21 Heating tube 211 Heating Cavity 212 Base 213 Electric heating element 2131 Heat generating components 2312 Electrode materials 22 Electrical connection parts 221 Main body 2211 Connection 2212 Elastic piece 222 Contact part 2221 1st contact part 2222 Second contact part 223 Hook 23 Layered members 231 First layer member 2311 Second guide groove 2312 First guide groove 232 Fixed pipe 2321 Through hole 24 Clamping space 25 Conductor 26 Temperature measuring element 261 Probe 262 Conductive Pin 2621 Second bending part 2622 Third bend 263 Good thermal conductivity materials 2631 Substrate 2632 Protrusion 2633 Contact arm 2634 Evacuation space 27 End Cap 3 Power Supply Assembly 31 Control Board 32 Batteries 4 Heating device 41 Heating cavity 5 Infrared Heating Assembly 51 Infrared heating element 511 Infrared Electric Heat Coating 512 Conductive part 52 Electrical connection parts 521 First electrical connection member 522 Second electrical connection member 523 Main body 524 Conductive contact piece 525 Extension 53 Temperature measuring element 54 Support member 541 Layered Members 5411 Vertical opening 5412 Hole 1 5413 Notch 542 Fixed tube 5421 Fixed hole

Claims

1. 1. A heating assembly for heating an aerosol-forming substrate to generate an aerosol, comprising: a tubular heating element surrounding at least a portion of the aerosol-forming substrate to form a heating cavity adapted to contain the aerosol-forming substrate; a temperature measuring element for sensing the temperature of the heating element; a support member including a layer of thermally insulating material configured to surround at least a portion of the length of the heating element; A heating assembly, characterized in that the support member is provided with a clamping structure for fixing the temperature measuring element.

2. 10. The heating assembly of claim 1, wherein the thermal insulation material comprises at least one of aerogel, silica gel, and ceramic fiber cloth.

3. The aerogel is made of a polymer material and SiO ２ The heating assembly of claim 2 , comprising aerogel particles.

4. The heating assembly of claim 3, wherein the polymeric material comprises at least one of PU, PTFE, melamine foam, and polymeric resin.

5. 2. The heating assembly of claim 1, wherein the layered member is flexible and can be wrapped around the outer periphery of the heating element.

6. 6. The heating assembly of claim 5, wherein the two free ends of the layered member are secured with high temperature tape.

7. 4. The heating assembly of claim 3, wherein the thickness of the layered member is approximately 0.5 mm to 2 mm.

8. The heating assembly of claim 1 , wherein the support member further includes a fixed tube provided on the exterior of the layer member, the fixed tube being configured to circumferentially wrap around at least a portion of the outer surface of the layer member.

9. The heating assembly of claim 8 , wherein the fixed tube comprises a PI tube.

10. 9. The heating assembly of claim 8, wherein the sandwiching structure includes an opening in the layered member, and the temperature measuring element is housed within the opening.

11. 11. The heating assembly of claim 10, wherein the fixed tube is used to close the outer opening of the opening so that the temperature measuring element is sandwiched between the heating element and the fixed tube.

12. 11. The heating assembly of claim 10, wherein the opening extends longitudinally from one end of the layered member.

13. The heating assembly according to claim 10, wherein the clamping structure further includes a fixing hole provided in the fixed pipe for positioning the temperature measuring element.

14. 9. The heating assembly of claim 8, further comprising an electrical connection member, wherein the heating element is electrically connected to a power supply assembly via the electrical connection member.

15. 15. The heating assembly according to claim 14, wherein the electrical connection member is sandwiched between the layer member and the fixed tube.

16. 15. The heating assembly of claim 14, wherein the layer member has a first hole, the electrical connection member has a plurality of conductive contact pieces, and the conductive contact pieces pass through the first hole and are conductively connected to the conductive portion of the heating element.

17. 17. The heating assembly of claim 16, wherein the first hole is generally square.

18. 17. The heating assembly of claim 16, wherein the layered member has two first holes and further has an opening for accommodating the temperature measuring element, the opening being located between the two first holes.

19. the electrical connection member is electrically connected to a power supply assembly via a conductor, an extension portion is provided at one end of the electrical connection member, and the conductor is connected to the extension portion; 16. The heating assembly of claim 15, wherein one side of the layer member is provided with a notch, and the electrical connection member and at least a portion of the conductor are housed within the notch.

20. The heating assembly of claim 1 , wherein the heating element includes an infrared coating.

21. a heating tube having a heating cavity therein for containing at least a portion of the aerosol-generating product; a temperature measuring element including a probe in contact with the heating tube and a conductive pin having a bent portion connected to the probe; a back-stop portion configured to stop the bending portion and prevent movement of the probe.

22. an outer surface of the heating tube having a first position and a second position, the probe contacting the second position; The heating assembly further includes a first layer member provided on an outer periphery of at least a portion of the heating tube, the first layer member having a first guide groove that connects the first position and the second position; 22. The heating assembly of claim 21, wherein the conductive pin has the bent portion at or near the first position.

23. 23. The heating assembly of claim 22, wherein the second position is exposed within the first guide groove, and the probe is stopped at an extension end point of the first guide groove when in the second position.

24. 23. The heating assembly of claim 22, wherein the first position is exposed within the first guide groove, the anti-retraction portion includes an extension start point of the first guide groove, and the extension start point is adjacent to the first position.

25. 23. The heating assembly of claim 22, wherein the second location is exposed within the first guide groove, and the width of the first guide groove is equal to or greater than the width of the temperature measuring element.

26. 23. The heating assembly of claim 22, further comprising a fixed tube surrounding the outer periphery of the first layer member, the fixed tube having the anti-retraction portion.

27. The heating assembly of claim 26, characterized in that the anti-retraction portion includes a first through hole opened in the fixed tube, the first through hole communicates with the first position, the conductive pin passes through the first through hole, and at least a portion of the bent portion is located within the first through hole.

28. 28. The heating assembly of claim 27, wherein at least a portion of the wall of the first through-hole contacts the bent portion.

29. the fixed tube shields the outer periphery of the second position; The thickness of the probe in the radial direction of the heating tube is greater than the thickness of the first layer member, or 27. The heating assembly of claim 26, wherein the fixed tube contacts and presses against the probe.

30. 27. The heating assembly of claim 26, further comprising an electrical connection member electrically connected to the heating tube, at least a portion of the electrical connection member being provided between the heating tube and the fixed tube, the electrical connection member abutting against the fixed tube to provide a clamping force for clamping the fixed tube, and the fixed tube being configured to press the probe inward in a radial direction of the heating tube under the action of the clamping force.

31. an upper end of the heating tube is open for inserting at least a portion of the aerosol-generating product; 31. The heating assembly of claim 30, wherein projections of the electrical connection member and the probe onto the upper or lower end of the heating tube do not overlap.

32. 31. The heating assembly of claim 30, wherein the first layer member further has a second guide groove, and the electrical connection member is configured to move along the second guide groove during insertion between the heating tube and the fixed tube.

33. 31. The heating assembly of claim 30, wherein the electrical connection member includes a main body portion that abuts the heating tube and a hook portion extending from the main body portion, and at least a portion of the hook portion is configured to prevent movement of the electrical connection member along the heating tube.

34. 23. The heating assembly of claim 22, wherein the first layered member comprises a thermal layer.

35. 22. The heating assembly of claim 21, further comprising a fixed tube surrounding an outer periphery of at least a portion of the heating tube, wherein a first through hole is formed in the fixed tube, at least a portion of the probe is held between the fixed tube and the heating tube, the conductive pin passes through the fixed tube through the first through hole, at least a portion of the bent portion is formed within the first through hole, and the anti-retraction portion includes the first through hole.

36. 22. The heating assembly of claim 21, further comprising an end cap connected to an end of the heating tube, the end cap having the anti-retraction portion.

37. 37. The heating assembly of claim 36, wherein the anti-retraction portion includes a second through hole opened in the end cap, the conductive pin passes through the second through hole, and the bent portion is between the second through hole and the probe, and the second through hole is configured to prevent the bent portion from passing through.

38. 22. The heating assembly of claim 21, wherein the anti-retraction portion includes a first anti-retraction portion and a second anti-retraction portion, the conductive pin is connected to the first anti-retraction portion and the second anti-retraction portion, and a geometric connection line between the first anti-retraction portion and the second anti-retraction portion is inclined with respect to an axial direction of the heating tube.

39. a heating tube having a heating cavity therein for containing at least a portion of the aerosol-generating product; a temperature measuring element including a probe and a conductive pin connected to the probe; a fixed tube surrounding an outer periphery of at least a portion of the heating tube, wherein at least a portion of the probe is held between the fixed tube and the heating tube, a first through hole is formed in the fixed tube, and the conductive pin passes through the first through hole; A heating assembly, characterized in that the extending direction of the conductive pin between the fixed pipe and the heating pipe and the penetrating direction of the first through-hole are not on the same straight line.

40. a tubular heating element; a temperature measuring element fixed to a surface of the heating element; a layered member configured to surround at least a portion of the length of the heating element; and a support member including a stationary tube circumferentially enveloping at least a portion of an outer surface of the layered member, the layered member being made from a thermally insulating material; A heating assembly, characterized in that the support member is provided with a clamping structure for fixing the temperature measuring element.

41. a tubular heating element; a temperature measuring element fixed to a surface of the heating element; a support member including a layered member made from aerogel configured to surround at least a portion of the length of the heating element; 2. An infrared heating assembly, wherein the support member is provided with a clamping structure for fixing the temperature measuring element.

42. wrapping a thermally insulating layer around an outer surface of the heating element; a fixed pipe fitted around the outer periphery of the heat-insulating layered member; and inserting a temperature measuring element through an opening in the thermally insulating layered member.

43. The step of inserting the temperature measuring element through the opening of the heat-retaining layer member comprises:

43. The method of claim 42, further comprising inserting the temperature measuring element through a bottom opening of the thermal insulation layer member until the temperature measuring element is locked into a fixing hole of the fixed tube.

44. Before fitting the fixed pipe onto the outer periphery of the heat-insulating layered member, 43. The method of claim 42, further comprising disposing an electrical connection member on the thermally insulating layer member.

45. 41. An aerosol generating device comprising a heating device including a heating assembly according to any one of claims 1 to 40, and a power supply assembly for providing an electrical power drive to the heating device.

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