Heating assembly and aerosol-generating device

Abstract

The embodiment of the invention relates to a heating assembly and an aerosol generating device, and the heating assembly comprises a heating pipe which is internally provided with a heating cavity for accommodating at least part of an aerosol generating product; the temperature measuring element comprises a detection head and a conductive pin connected with the detection head, and the detection head is in contact with the outer surface of the heating pipe; the fixing pipe is arranged on at least partial periphery of the heating pipe; wherein the detection head is located between the heating pipe and the fixed pipe, and the detection head has elasticity and elastically abuts against the heating pipe or the fixed pipe.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of aerosol generating devices, and in particular, to a heating component and an aerosol generating device. Background Art

[0002] The aerosol generating device includes a heating component, which is usually an electric heating component. The electric heating component releases heat when electricity is turned on to heat the aerosol generating product, so that the aerosol generating product generates aerosol without burning.

[0003] Some existing aerosol generating devices usually also include a temperature measuring element for detecting the temperature of the heating component. The temperature measuring element is generally connected to the electric heating component by welding. However, on the one hand, welding may damage the insulating layer on the surface of the electric heating component. On the other hand, when the electric heating component is a film layer formed on a substrate, the temperature measuring element welded to the electric heating component is likely to pull the film layer, causing the film layer to rupture or detach from the substrate. Summary of the invention

[0004] The embodiments of the present application provide a heating assembly and an aerosol generating device, which can ensure that a temperature measuring element is stably connected to a heating tube without damaging the heating tube.

[0005] The present application provides a heating assembly, including:

[0006] a heating tube having a heating chamber therein for at least partially housing the aerosol-generating article;

[0007] a temperature measuring element, comprising a detection head and a conductive pin connected to the detection head, wherein the detection head contacts the outer surface of the heating tube; and

[0008] A fixed tube, arranged at least partially around the periphery of the heating tube;

[0009] Wherein, the detection head is located between the heating tube and the fixed tube, and the detection head is elastic and elastically abuts against the heating tube or the fixed tube.

[0010] An embodiment of the present application provides an aerosol generating device, comprising the above-mentioned heating component, and also comprising a power supply component for providing power to the heating component.

[0011] In the above-mentioned heating assembly and aerosol generating device, the detection head of the temperature measuring element is elastic, and the detection head can elastically abut the heating tube or the fixed tube, so that the detection head can be stably maintained between the heating tube and the fixed tube and the detection head can be close to the heating tube. Compared with welding to keep the detection head connected to the heating tube, it can better protect the surface of the heating tube from being damaged and can more easily combine the temperature measuring element with the heating tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0013] Figure 1 is a schematic diagram of an aerosol generating device provided in one embodiment of the present application;

[0014] Figure 2 is a schematic diagram of a heating assembly provided in one embodiment of the present application;

[0015] Figure 3 is an exploded view of a heating assembly provided in one embodiment of the present application;

[0016] Figure 4 is a schematic diagram of a first layered component provided by an embodiment of the present application;

[0017] Figure 5 is a schematic diagram of an electrical connector provided in one embodiment of the present application;

[0018] Figure 6 is a schematic diagram of a fixed tube provided in one embodiment of the present application;

[0019] Figure 7 is a schematic diagram of an electric heating element provided in one embodiment of the present application;

[0020] Figure 8 is another schematic diagram of an electric heating element provided by an embodiment of the present application;

[0021] Fig. 9 is a schematic diagram of a heating assembly provided in an embodiment of the present application after removing the fixing tube;

[0022] Fig.10 is a schematic diagram of a heating assembly provided by an embodiment of the present application having an end cover;

[0023] Fig.11 is a schematic diagram of a temperature measuring element provided in an embodiment of the present application;

[0024] Fig.12 is another schematic diagram of a temperature measuring element provided in one embodiment of the present application;

[0025] Fig.13 is another schematic diagram of a temperature measuring element provided in one embodiment of the present application;

[0026] Numbers in the figure:

[0027] 1. Aerosol generating products;

[0028] 2. Heating assembly; 21. Heating tube; 211. Heating chamber; 212. Base; 213. Electric heating element; 2131. Heating element; 2312. Electrode element;

[0029] 22, electrical connector; 221, main body; 2211, connecting portion; 2212, spring piece; 222, abutting portion; 2221, first abutting portion; 2222, second abutting portion; 223, positioning portion;

[0030] 23, layered component; 231, first layered component; 2311, second guide groove; 2312, first guide groove; 232, fixing tube; 2321, through hole; 24, clamping space; 25, wire;

[0031] 26, temperature measuring element; 261, detection head; 262, conductive pin; 2621, first bend; 2622, second bend; 263, heat conducting element; 2631, base; 2632, protrusion; 2633, elastic arm; 2634, window; 2635, accommodation space; 264, hot end;

[0032] 27. End cap;

[0033] 3. Power supply assembly; 31. Control board; 32. Battery. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or suggesting the quantity or order of the indicated technical features relative to importance or implicitly indicating. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship or movement between the components under a certain specific posture (as shown in the accompanying drawings), and if the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or equipment comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or equipment.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements can exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements can exist between them.

[0038] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0039] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0040] Please refer to Figure 1 One embodiment of the present application provides an aerosol generating device, which can be used to heat an aerosol generating product 1 so that the aerosol generating product 1 generates an aerosol.

[0041] In one embodiment, the aerosol-generating article 1 may be an article comprising an aerosol-forming substrate that is intended to be heated rather than burned to release volatile compounds that can form an aerosol. The aerosol formed by heating the aerosol-forming substrate may contain fewer known hazardous components than an aerosol produced by burning or pyrolytic degradation of the aerosol-forming substrate. In one example, the aerosol-generating article is removably coupled to the aerosol-generating device. The aerosol-generating article 1 may be disposable or reusable. In one example, the aerosol-forming substrate comprises tobacco, tobacco leaves, tobacco shreds, or tobacco paste, etc.

[0042] The aerosol generating device is a device that is coupled or interacts with the aerosol generating article 1 to form an inhalable aerosol. For example, the aerosol generating device is an electrically operated aerosol generating device, which has a power supply component 3 and a heating component 2 therein, and the power supply component 3 supplies energy to enable the heating component 3 to heat the aerosol generating article 1.

[0043] The heating component 2 includes an external heating component, an internal heating component or an air heating component. As used herein, the term "external heating component" refers to a heating component that is positioned outside the aerosol generating product when the aerosol generating product is combined with the aerosol generating device. As used herein, the term "internal heating component" refers to a heating component that is at least partially positioned inside the aerosol generating product when the aerosol generating product is combined with the aerosol generating device. As used herein, the term "air heating component" refers to a heating component that is used to heat the air in the air inlet channel upstream of the aerosol generating product, so that at least part of the air in the air flow channel becomes hot air, and then the hot air enters the aerosol generating product to release heat to heat the aerosol generating product.

[0044] Please refer to Figure 2 and Figure 3 The heating assembly 2 includes a heating tube 21, and the heating tube 21 has a heating chamber 211 capable of accommodating at least part of the aerosol generating product 1. The aerosol-forming substrate of the aerosol generating product 1 is heated in the heating chamber 211 to generate an aerosol. Figure 2 and Figure 3 The upper end of the heating chamber 211 is open, so that the upper end of the heating chamber 211 has an entrance for inserting the aerosol generating article 1 into the heating chamber 211, so that the aerosol generating article 1 can be inserted into the heating chamber 211 from the upper end of the heating chamber 211.

[0045] When the heating assembly 2 is an internal heating assembly, the heating assembly 2 further comprises an insert at least partially disposed in the heating cavity 211, and when the aerosol generating article 1 is inserted into the heating cavity 211, at least a portion of the insert is inserted into the aerosol forming substrate. In this embodiment, the insert may comprise a susceptor. As used herein, the term "susceptor" refers to a material that can convert electromagnetic energy into heat. When located in a changing electromagnetic field, eddy currents can be formed in the susceptor, thereby causing the susceptor to heat up.

[0046] Based on this, a magnetic field generator may be provided or connected to the heating tube 21. The magnetic field generator is used to generate a changing magnetic field so that the insert in the heating tube 21 heats up. 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 a changing magnetic field. The magnetic field generator may include one or more induction coils that generate a changing magnetic field, and the one or more induction coils may be combined with the heating tube 21 to surround the receptor. In one embodiment, one or more induction coils may be formed on the outer surface of the heating tube 21 by printing, or one or more induction coils may be combined with the outer surface of the heating tube 21 in the form of a film layer.

[0047] Wherein, the susceptor may comprise metal or carbon. In one embodiment, the susceptor may 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, which comprises 410 grade or 420 grade or 430 grade stainless steel. Different materials will dissipate different amounts of energy when positioned within an electromagnetic field having similar frequency and field strength values. Therefore, the parameters of the susceptor, such as material type, length, width and thickness, may all be varied to provide the desired power dissipation within a given electromagnetic field.

[0048] When the heating component 2 is an external heating component, you can refer to Figure 3 , Figure 7 and Figure 8 The heating tube 21 may include a tubular base 212 and an electric heating element 213 combined on the base 212 .

[0049] The electric heating element 213 may include a resistive heating element, and the resistive material in the resistive heating element includes, but is not limited to, semiconductors such as doped ceramics, conductive ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic materials and metal materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable 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 superalloys based on nickel, iron, and cobalt, stainless steel, iron-aluminum-based alloys, and iron-manganese-aluminum-based alloys. In the composite material, the resistive material may be embedded in an insulating material, encapsulated or coated by an insulating material, or vice versa, as needed.

[0050] The resistance heating element may be a resistance material coating or a resistance material printing layer formed on the outer surface of the substrate 212; or the resistance heating element may be a heating film covered on the outer surface of the substrate 212; or the resistance heating element may be a resistance wire or a resistance mesh arranged on the outer surface of the substrate 212; or the resistance heating element may be a conductive ceramic. It should be noted that in other embodiments, the substrate 212 of the heating tube may be made of conductive ceramic, so that there is no need to provide a separate resistance heating element.

[0051] The electric heating element 213 may include an infrared heating element, which may be an infrared electric heating coating. The infrared heating element is formed on the outer surface of the substrate 212, and the substrate 212 is made of a material that can transmit infrared rays, such as quartz. The infrared heating element can generate heat energy when powered on, and then generate infrared rays of a certain wavelength, for example: infrared rays of 0.75μm to 1000μm. The infrared electric heating coating can be optionally prepared by fully mixing far-infrared electric heating ink, ceramic powder and inorganic adhesive, and then printing them on the outer surface of the substrate, and then drying and curing for a certain period of time. The thickness of the infrared electric heating coating is 30μm-50μm; of course, the infrared electric heating coating can also be prepared by mixing tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride and anhydrous copper sulfate in a certain proportion and then coating them on the outer surface of the substrate; or it can be a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium-titanium oxide ceramic layer, a zirconium-titanium nitride ceramic layer, or a silicon carbide ceramic layer. The infrared electric heating coating can also be a coating of other existing materials.

[0052] In one embodiment, the electric heating element 213 includes a heating element 2131 that generates heat or infrared rays when powered on, and an electrode element 2312 that is electrically connected to the heating element 2131, the resistance of the electrode element 2312 is lower than the resistance of the heating element 2131, and the electrode element 2312 is used to electrically connect the heating element 2131 and the electrical connector 22. In one embodiment, the electric heating element 213 includes a heating element 2131 that generates heat or infrared rays when powered on, and the heating element 2131 is directly electrically connected to the electrical connector 22.

[0053] The outer surface of the heating tube 21 has a preset temperature measurement position, namely the second position. The second position may be in a heat concentration area of ​​the heating tube 21. The heat concentration area of ​​the heating tube 21 has a higher temperature or heats up faster than other areas of the heating tube 21.

[0054] Please refer to Figure 2 , Figure 3 and Fig. 9 The heating assembly 2 includes a temperature measuring element 26, which is close to the outer surface of the heating tube 21 and is used to sense the temperature of the heating tube 21; specifically, the temperature measuring element 26 includes a detection head 261 and a conductive pin 262 connected to the detection head 261, and the detection head 261 is set at a second position in contact with or adjacent to the heating tube 21.

[0055] In one embodiment provided in the present application, the temperature measuring element 26 is configured to include a thermistor temperature detector, the thermistor includes a thermistor core and two conductive pins 262, the thermistor core is arranged in the detection head 261, and the two conductive pins 262 are respectively connected to the two electrodes of the thermistor chip. At least part of the thermistor chip and the two conductive pins 262 are encapsulated inside the housing to form a thermistor temperature detector. The two conductive pins 262 are electrically connected to the control board 31 of the power supply component 3, so as to transmit the temperature information to the control board 31 of the power supply component 3, and the control board 31 controls the power supply provided by the battery 32 to the heating tube 21 according to the timely temperature information of the heating tube 21 measured by the thermistor temperature detector.

[0056] The housing of thermistor temperature detector probe 261 may include a heat-conducting element 263. The heat-conducting element 263 is made of a heat-conducting material and has a high thermal conductivity. The heat-conducting material can be understood as a material having a thermal conductivity of at least 10W / mK, preferably at least 40W / mK, and more preferably at least 100W / mK at 23°C and a relative humidity of 50%. Specifically, the heat-conducting material is formed of a material having a thermal conductivity of at least 40W / mK, preferably at least 100W / mK, more preferably at least 150W / mK, and most preferably at least 200W / mK at 23°C and a relative humidity of 50%. 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 heat-conducting element 263 is arranged close to the heating tube 21. Since the heat-conducting element 263 has good thermal conductivity, it can quickly achieve the same temperature as the surface of the heating tube 21. In order to increase the sensitivity of the heat-conducting element 263 to the temperature change of the heating tube 21 and reduce the heat absorbed by the heat-conducting element 263 from the heating tube 21, the thickness of the heat-conducting material forming the heat-conducting element 263 can be reduced. For example, the thickness of the heat-conducting material can be between 0.03mm-1.5mm, or the thickness of the heat-conducting material can be 0.1mm.

[0057] In one embodiment provided in this application, reference can be made to Figure 11-13 The temperature measuring element 26 is configured to include a thermocouple, which may be a K-type thermocouple, a J-type thermocouple, an S-type thermocouple, an R-type thermocouple, a B-type thermocouple, a T-type thermocouple, an N-type thermocouple, or an E-type thermocouple. The conductive pin 262 includes two thermocouple wires made of different materials, namely a first thermocouple wire and a second thermocouple wire.

[0058] The detection head 261 includes a heat conducting element 263 .

[0059] In one example, refer to Fig.13, the first thermocouple wire and the second thermocouple wire are electrically connected to each other to form a thermocouple, and then the hot end 264 of the thermocouple is welded to the thermal conductive element 263. In one example, the thermal conductive element 263 includes a conductor, and the hot end of the first thermocouple wire and the hot end of the second thermocouple wire are both connected to the conductor, so that the first thermocouple wire and the second thermocouple wire are electrically connected through the conductor to form a thermocouple.

[0060] The cold end of the thermocouple is used to be electrically connected to the control board 31 of the power supply assembly 3, so that the control board 31 can obtain the temperature of the hot end of the thermocouple based on the thermoelectromotive force caused by the temperature difference between the hot end and the cold end of the thermocouple, that is, obtain the temperature of the heat conducting element 263, and then obtain the temperature of the second position on the surface of the heating tube 21.

[0061] In the embodiment where the temperature measuring element 26 includes a thermocouple, the surface of at least one of the heating tube 21 and the heat-conducting element 263 may have an insulating layer to prevent the induction coil, the electric heating element 213 or the substrate 212 made of conductive ceramic on the heating tube 21 from being electrically connected to the heat-conducting element 263, thereby avoiding the electrical interference of the heat-conducting element 263 on the induction coil, the electric heating element 213 or the substrate 212 made of conductive ceramic, and ensuring that the heating of the heating tube 21 is not affected by the heat-conducting element 263 and the thermocouple. In one example, the surface of the induction coil, the electric heating element 213 or the substrate 212 made of conductive ceramic has an insulating layer, which may be formed by printing, spraying, physical deposition, chemical deposition, ion implantation or particle sputtering, or the insulating layer may be a high-temperature tape wrapped around or pasted on the surface of the heating tube 21.

[0062] Please refer to Figure 2 and Figure 3 The heating assembly 2 includes a layered component 23, which is arranged around at least a part of the heating tube 21. The layered component 23 includes a fixed tube 232, and the detection head 261 is located between the heating tube 21 and the fixed tube 232. The fixed tube 232 provides a force to make the detection head 261 close to the heating tube 21. In one example, the fixed tube 232 is elastic, so that the fixed tube 232 elastically squeezes the detection head 261, so that the detection head 261 is close to the heating tube 21; in one example, the detection head 261 is elastic, and the detection head 261 elastically abuts against the heating tube 21 or the fixed tube 232, so that the detection head 261 can be close to the heating tube 21.

[0063] In one embodiment, the detection head is elastic. In this embodiment, the detection head includes a heat-conducting element and an elastic member. The elastic member includes silicone, rubber, sponge or a spring, etc. The elastic member is elastic and elastically abuts against the heating tube or the fixing tube.

[0064] In one embodiment, the detection head 261 is elastic, or the detection head 261 includes a heat-conducting element 263, and the heat-conducting element 263 is elastic. In this embodiment, the detection head 261 includes a first abutting portion abutting the heating tube 21 and a second abutting portion abutting the fixed tube 232, and at least one of the first abutting portion and the second abutting portion is elastic.

[0065] For details, please refer to Fig.12 and Fig.13 The second abutting portion includes an elastic arm 2633, which may include a cantilever with a free end, the free end of the cantilever bends and extends toward the direction of the first abutting portion, so that an arc-shaped second abutting surface B is formed on the surface of the second abutting portion. The second abutting surface B formed in this way has a smooth surface, which helps to prevent damage to the fixed tube 232 when the second abutting surface B abuts against the fixed tube 232 and prevent stress concentration on the fixed tube 232. The elastic arm 2633 provides a force for the second abutting surface B to elastically abut against the fixed tube 232.

[0066] The elastic arm 2633 may include a first elastic arm and a second elastic arm spaced apart from each other, and the first elastic arm and the second elastic arm may be arranged opposite to each other, so that the length of each elastic arm 2633 can be shortened, which is beneficial to improving the elastic coefficient of the elastic arm 2633, so that under the same extrusion force, the elastic arm 2633 can have a smaller elastic deformation, which is beneficial to reducing the volume of the detection head 261. Of course, in other examples, the first elastic arm and the second elastic arm may be arranged side by side.

[0067] You can refer to Fig.11 The first abutting portion may include a first abutting surface A abutting the heating tube 21. In order to improve the sensitivity of the detection head 261 to the temperature change of the heating tube 21 and make the first abutting portion keep the temperature consistent with the surface of the heating tube 21 as much as possible, at least a local area of ​​the first abutting surface A can be an arc-shaped surface that fits the outer surface of the heating tube 21, which is beneficial for the first abutting surface A to fit with the heating tube 21 and can increase the heat exchange area.

[0068] Specifically, at least a partial edge of the first abutting surface A is bent and extended toward the direction of the second abutting portion, so that at least a partial edge of the first abutting surface A has a rounded corner, thereby preventing the surface of the heating tube 21 from being damaged by the edge of the first abutting surface A when the heating tube 21 and the detection head 261 are combined.

[0069] In such Fig.11 and Fig.13In the illustrated embodiment, the first abutting portion includes a base 2631 and a protrusion 2632 formed on the base 2631, and the protrusion 2632 has the above-mentioned first abutting surface A. The edge of the first abutting surface A is bent and extended to form the side edge of the protrusion 2632. The transition from the first abutting surface A to the side edge is a smooth transition, so that there is no obvious dividing line between the first abutting surface A and the side edge, so that no matter which direction the detection head 261 moves along the surface of the heating tube 21, the edge of the first abutting surface A will not scratch or damage the surface layer of the heating tube 21. In order to ensure the area of ​​the first abutting surface A, the protrusion 2632 can occupy more than 70% of the area of ​​the base 2631, for example, occupy 80% or 90% of the area of ​​the base 2631. The above-mentioned protrusion 2632 can be formed by stamping the inner side of the base 2631 so that the inner side of the base 2631 is concave and the outer side is convex.

[0070] Since the material of the detection head 261, such as the thermal conductive element 263, has a relatively small thickness, which may be between 0.03 mm and 1.5 mm, it is more effective to form the protrusion 2632 with rounded corners by stamping than to grind the edge of the material, such as the thermal conductive element 263, into a rounded corner.

[0071] In order to ensure that the first abutting surface A has a larger area while reducing the extended area of ​​the first abutting portion, that is, to miniaturize the detection head 261, the hollowing out of the first abutting portion can be reduced so that the first abutting portion has good integrity. When there is no hollowing out or a small amount of hollowing out on the first abutting portion, it helps to prevent the first abutting portion from scratching and damaging the surface of the heating tube 21 when moving along the surface of the heating tube 21.

[0072] Please refer to Fig.12 and Fig.13 , the conductive pin 262 is connected to the inner side of the first abutting portion. More specifically, the hot end 264 of the thermocouple is connected to the inner side of the protrusion 2632, so that the hot end 264 of the thermocouple is closer to the heating tube 21, which helps to make the hot end 264 of the thermocouple closer to the surface temperature of the heating tube 21.

[0073] The second abutting portion may be formed with a window 2634 for the welding laser or welding head to pass through, and the window 2634 is arranged corresponding to the end or hot end 264 of the conductive pin 262. The window 2634 can not only allow the welding laser or welding head to pass through and weld the conductive pin 262 and the temperature measuring element 26, but also allow the welding to be performed in a visually detectable state (including visually detectable by the naked eye or by machine vision), thereby not only improving the welding quality, but also reducing the difficulty of the welding process. Specifically, the window 2634 is arranged corresponding to the welding point on the first abutting portion, and the conductive pin 262 is welded at the welding point.

[0074] Please refer to Figure 11-13 The detection head 261 includes a first abutting portion abutting the heating tube 21 and a second abutting portion abutting the fixed tube 232. There is a accommodating space between the first abutting portion and the second abutting portion. The end of the conductive pin 262 is accommodated in the accommodating space 2635, so as to avoid the end of the conductive pin 262 or the hot end 264 from contacting the heating tube 21 and the fixed tube 232, which helps to prevent the heating tube 21 and / or the fixed tube 232 from rubbing against the end of the conductive pin 262 when the detection head 261 moves along the heating tube 21, thereby affecting the connection stability and contact quality between the end of the conductive pin 262 or the hot end 264 and the detection head 261.

[0075] In such Fig.11 and Fig.12 In the illustrated embodiment, the lower end of the accommodation space 2635 is open, so that the end of the conductive pin 262 or the hot end 264 can be inserted into the accommodation space 2635. The upper end of the accommodation space 2635 can also be open, but the present invention is not limited thereto.

[0076] When the detection head 261 of the temperature measuring element 26 is set in the second position, the conductive pin 262 connected to the detection head 261 is usually pulled during the process of electrically connecting the conductive pin 262 connected to the power supply component 3. In order to prevent the detection head 261 from deviating from the second position under the pulling of the conductive pin 262, the heating component 2 can be constructed into a structure that can prevent the detection head 261 from moving in the pulling direction.

[0077] In one embodiment, the heating assembly 2 includes a fixed tube 232, which surrounds at least a portion of the periphery of the heating tube 21, and at least a portion of the detection head 261 is maintained between the fixed tube 232 and the heating tube 21. Specifically, the fixed tube 232 can squeeze the detection head 261 so that the detection head 261 is close to the heating tube 21 and prevent the detection head 261 from moving.

[0078] The fixed tube 232 is provided with a first through hole 2321 through which the conductive pin 262 can pass. The first through hole 2321 is configured to change the extension direction of the conductive pin 262 so that the conductive pin 262 is bent when passing through the first through hole 2321. In one example, the central axis of the first through hole 2321 is inclined relative 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 detection head 261 needs to change the extension direction before passing 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 detection head 261 and the first through hole 2321, so that the conductive pin 262 is bent due to passing through the first through hole 2321.

[0079] For the sake of clarity, the conductive pin 262 between the detection head 261 and the first through hole 2321 is defined as the first part, the conductive pin 262 located in the first through hole 2321 is defined as the second part, and the conductive pin 262 outside the first through hole 2321 is defined as the third part. The first part and the second part have different extension directions, that is, the bending occurs between the first part and the second part. When the third part is pulled, the bending on the conductive pin 262 can make the forces borne by the first part and the third part different, and can make the force borne by the first part smaller than the force borne by the third part. It should be noted that the first part can have a certain length and can be located between the fixed tube 232 and the heating tube 21, but is not limited to this.

[0080] Specifically, when pulling the third part, the hole wall of the first through hole 2321 can contact and support the second part, or the hole wall of the first through hole 2321 can contact and support the conductive pin 262. Because of the bend formed by the first through hole 2321, the supporting force provided by the hole wall of the first through hole 2321 for the conductive pin 262 can reduce the force borne by the first part.

[0081] Alternatively, when the third part is pulled slightly, the bending degree of the bend formed by the first through hole 2321 can be changed, for example, the angle between the first part and the second part can be increased, so that the conductive pin 262 can extend an appropriate distance along the direction of the pulling force, thereby reducing the pulling force that the first part should bear.

[0082] Therefore, the bend formed by the first through hole 2321 can reduce the force acting on the detection head 261 along the conductive pin 262 , which helps to prevent the detection head 261 from moving.

[0083] In one embodiment, please refer to Figure 2 and Figure 3 The conductive pin 262 has a bending portion formed by bending, and the bending portion may have one or more portions. The heating component 2 also includes an anti-retreat portion, and the anti-retreat portion may have one or more portions. Each anti-retreat portion is arranged corresponding to at least one bending portion. The anti-retreat portion and the corresponding bending portion may be close in position but not in contact with each other, or the anti-retreat portion and the corresponding bending portion may be in contact with each other, so that when the conductive pin 262 is pulled, the anti-retreat portion can stop the bending portion that contacts with it through deformation or can stop the bending portion that contacts with it, so as to provide a stopping force to resist the force of pulling the conductive pin 262, and the stopping force can reduce the pulling force of the conductive pin 262 on the detection head 261, so that the anti-retreat portion can prevent the detection head 261 connected to the conductive pin 262 from deviating from the second position.

[0084] For example, when the detection head 261 of the temperature measuring element 26 is set in the second position, the conductive pin 262 connected to the detection head 261 is usually pulled during the process of electrically connecting the conductive pin 262 to the power supply assembly 3. At this time, the synergistic effect between the anti-retraction portion and the bending portion can reduce the pulling force of the conductive pin 262 on the detection head 261 when the conductive pin 262 is pulled, thereby helping to keep the detection head 261 in the second position and helping to prevent the detection head 261 from moving. At the same time, the anti-retraction portion and the bending portion can reduce the force that causes the conductive pin 262 to pull the detection head 261, helping to prevent the pulling force from damaging the connection integrity between the detection head 261 and the conductive pin 262 and helping to protect the temperature measuring element 26.

[0085] In one embodiment, please refer to Figure 2 and Figure 3 , the outer surface of the heating tube 21 also has a first position, and the heating assembly 2 includes a layered component 23, which is arranged around at least a part of the heating tube 21. Among them, the layered component 23 includes a first layered component 231, and the first layered component 231 has a first guide groove 2312, the first guide groove 2312 connects the first position and the second position, at least the second position of the first position and the second position can be exposed in the first guide groove 2312, and the first guide groove 2312 can provide a channel for guiding the detection head 261 from the first position to the second position. The detection head 261 can move from the first position to the second position along the surface of the heating tube 21. In an example, in the axial direction of the heating tube 21, the length of the first guide groove 2312 is consistent with the length of the detection head 261. In an example, in the axial direction of the heating tube 21, the length of the first guide groove 2312 is greater than the length of the detection head 261.

[0086] The conductive pin 262 has a bending portion at the first position or adjacent to the first position, and correspondingly, has an anti-retraction portion at the first position or adjacent to the first position, wherein the anti-retraction portion stops the bending portion to prevent the detection head 261 from retreating from the second position when the conductive pin 262 is pulled.

[0087] The extension direction of the first guide groove 2312 may be substantially parallel to the axial direction of the heating tube 21. The second position may be set at one end of the first guide groove 2312, that is, along the direction of the first guide groove 2312 leading to the second position, the first layered component 231 has a first end wall defining the end point of the first guide groove 2312, and the detection head 261 is stopped by the first end wall when in the second position, so as to ensure that the detection head 261 can be accurately moved to the second position.

[0088] The width of the first guide groove 2312 may be greater than the width of the detection head 261, so that the resistance of the first guide groove 2312 to the detection head 261 can be reduced in the process of moving the detection head 261 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 detection head 261, so that the first guide groove 2312 is arranged on the groove walls on opposite sides of the temperature measuring element 26, which can prevent the detection head 261 from moving undesirably along the circumference of the heating tube 21. Of course, in other embodiments, the width of the first guide groove 2312 may be slightly smaller than the width of the detection head 261, so that the first guide groove 2312 can clamp the detection head 261, which helps to keep the detection head 261 in the second position.

[0089] In one example, the first position may also be exposed in the first guide groove 2312, and the first guide groove 2312 may provide a channel for the detection head 261 to move from the first position to the second position, and in the first guide groove 2312, the first position is different from the second position, and the first position and the second position may be located at opposite ends of the first guide groove 2312, respectively, but not limited to this.

[0090] More specifically, the first position can be adjacent to the extension starting point of the first guide groove 2312, that is, along the direction of the first guide groove 2312 guiding the second position, and the first layered component 231 has a second end wall that defines the extension starting point of the first guide groove 2312. When the detection head 261 is in 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 along the radial direction of the heating tube 21 at the first position and extends to the outside of the first guide groove 2312, so that a bending portion on the conductive pin 262 can be formed in the first guide groove 2312 and corresponding to the first position, and the bending portion is called a No. 1 bending portion, and the second end wall can become an anti-retreat portion, which is called a No. 1 anti-retreat portion. The No. 1 anti-retreat portion contacts or approaches the No. 1 bending portion formed in the first guide groove 2312. When the conductive pin 262 is pulled, the No. 1 anti-retreat portion can stop the No. 1 bending portion, thereby preventing the detection head 21 from moving.

[0091] In one example, the first position is located outside the first guide groove, the heating assembly further includes an end cap disposed at the upper end or the lower end of the heating tube, the first position is adjacent to one of the end caps, the end cap adjacent to the first position is called the first end cap, the first position is located between the fixed tube and the first end cap, and a portion of the conductive pin extends radially along the heating tube at the first position, so 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, so that the conductive pin forms a bent portion adjacent to the first position. The first end cap has an edge with an outer diameter greater than the outer diameter of the heating tube, the edge constituting an anti-retraction portion capable of supporting the bent portion described in this example, and capable of preventing the detection head from moving when the conductive pin is pulled.

[0092] In one embodiment, the heating assembly 2 includes a fixed tube 232 and a first layered component 231 . The fixed tube 232 is provided with the anti-retreat portion, and the anti-retreat portion provided on the fixed tube 232 is referred to as a No. 2 anti-retreat portion.

[0093] Based on this embodiment, the second anti-retraction part may include a first through hole 2321 opened on the fixed tube 232, the first through hole 2321 is connected to the first position, the first through hole 2321 can allow the temperature measuring element 26 to pass through, and the temperature measuring element 26 passes through the first through hole 2321 into the first guide groove 2312, and then the detection head 261 can be moved to the second position along the first guide groove 2312. The first through hole 2321 can be arranged directly opposite to the first position.

[0094] Please refer to Figure 2 and Fig.10 , one of the bending portions in the conductive pin 262 is the second bending portion 2621, and at least a portion of the second bending portion 2621 may be located in the first through hole 2321. In this embodiment, the second bending portion 262 may be formed when the conductive pin 262 passes through the first through hole 2321 because the orientation of the first through hole 2321 and the extending direction of the first guide slot 2312 are not in the same straight line, or the second bending portion 262 may be formed before the conductive pin 262 passes through the first through hole 2321.

[0095] In one example, the second bending portion 2621 is suspended in the first through hole 2321 in an initial state, so that there is no contact between the second bending portion 2621 and the hole wall of the first through hole 2321. When the conductive pin 262 is pulled, the second bending portion 2621 is deformed. For example, when the conductive pin 262 is pulled, the second bending portion 2621 is deformed to reduce the bending degree, so that the second bending portion 2621 is extended. At this time, the pulling force of the conductive pin 262 on the detection head 262 is less than the pulling force on the conductive pin 262. Continue to pull the conductive pin 262 so that the second bend 2621 extends to contact the wall of the first through hole 2321. The wall of the first through hole 2321 can provide a force to support the second bend 2621. The component of this force in the opposite direction of the pulling force on the conductive pin 262 and the component of this force in the direction perpendicular to the pulling force on the conductive pin 262 are both smaller than the pulling force on the conductive pin 262. This can reduce the pulling force of the conductive pin 262 on the detection head 261, and help prevent the detection head 261 from moving away from the second position.

[0096] In one example, the second bending portion 2621 contacts at least part of the hole wall of the first through hole 2321 in the initial state, so that when the conductive pin 262 is pulled, the hole wall of the first through hole 2321 can provide a force to support the second bending portion 2621, and the force can reduce the pulling force of the conductive pin 262 on the detection head 261. Specifically, the second bending portion 2621 causes the conductive pin 262 to have a first step, and the first through hole 2321 supports the first step, so that the first through hole 2321 can prevent the second bending portion 2621 from exiting the first through hole 2321, thereby preventing the detection head 261 from moving from the second position to the first position.

[0097] Please refer to Figure 2 and Figure 3 In the process of the detection head 261 of the temperature measuring element 26 moving along the second guide groove 2312 to the second position, the conductive pin 262 of the temperature measuring element 26 partially passes through the first through hole 2321 and is then located in the second guide groove 2312, and partially located outside the fixed tube 232. The fixed tube 232 can block the periphery of the second position, so that the fixed tube 232 can block the detection head 261 of the temperature measuring element 26, so that the detection head 261 is hidden between the heating tube 21 and the fixed tube 232, so that in the subsequent assembly or processing of the heating component 2, the fixed tube 232 can isolate other components outside the heating component 2 from touching the detection head 261, which can protect the detection head 261 and prevent the detection head 261 from shifting.

[0098] Therefore, after the heating tube 21 , the first layered component 231 and the fixing tube 232 are arranged, the detection head 261 can be moved from the first position to the shielded second position through the first through hole 2321 , through the fixing tube 232 and via the first guide groove 2312 .

[0099] In one example, the thickness of the probe head 261 along the radial direction of the heating tube 21 is greater than the thickness D of the first layered component 231, so that the probe head 261 can protrude beyond the second guide groove 2312 along the radial direction of the heating tube 21, so that the probe head 261 can directly contact the fixed tube 232 and be directly squeezed inward by the fixed tube 232 along the radial direction of the heating tube 21; the radius of the fixed tube 232 (for example, the inner radius of the fixed tube) can be greater than or equal to the sum of the radius of the heating tube 21 (for example, the outer radius of the heating tube 21) and the thickness of the probe head 261 along the radial direction of the heating tube 21. In order to facilitate the movement of the probe head 261 from the first position to the second position, it is preferred that the inner radius of the fixed tube 232 is greater than the sum of the outer radius of the heating tube 21 and the thickness of the probe head along the radial direction of the heating tube 21.

[0100] Please refer to Figure 2 , Figure 3 and Figure 5The heating assembly 2 further includes an electrical connector 22 electrically connected to the heating tube 21, and the electrical connector 22 is electrically connected to the heating tube 21, so that the induction coil, the electric heating element 213 or the substrate 212 made of conductive ceramic arranged on the heating tube 21 is electrically connected to the electrical connector 22. The electrical connector 22 can be electrically connected to the power supply assembly 3 through a wire 25 or other conductive elements, or the electrical connector 22 can be directly electrically connected to the power supply assembly 3.

[0101] At least a portion of the electrical connector 22 is disposed between the heating tube 21 and the fixed tube 232, and the electrical connector 22 abuts against the fixed tube 232 to provide a tensioning force that tightens the fixed tube 232. The fixed tube 232 is configured to squeeze the detection head 261 radially inward along the heating tube 21 under the action of the tensioning force, so that the detection head 261 is tightly attached to the second position of the heating tube 21.

[0102] Based on this, in order to facilitate the movement of the detection head 261 to the second position along the first guide groove 2312, in the process of assembling the heating component 2, the temperature measuring element 26 can be assembled first, and when the detection head 261 is pushed to the second position, at least a part of the electrical connector 22 is inserted between the heating tube 21 and the fixed tube 232, so that the electrical connector 24 abuts the heating tube 21 and the fixed tube 232 on opposite sides, so that the fixed tube 232 is taut, and the taut fixed tube 232 is tightened to squeeze the detection head 261 inward, so that the detection head 261 is tightly attached to the second position of the heating tube 21.

[0103] The thickness of the electrical connector 22 along the radial direction of the heating tube 21 is greater than the thickness of the detection head 261 along the radial direction of the heating tube 21; or, the electrical connector 22 includes a main body portion electrically abutting the heating tube 21 and an abutting portion 222 extending from the main body portion 221 along the radial direction of the heating tube 21, the abutting portion 222 abuts the fixed tube 232, and the extension length L of the abutting portion 222 along the radial direction of the heating tube 21 is greater than the thickness of the detection head 261. Thus, the electrical connector 22 can provide a tightening force to tighten the fixed tube 232.

[0104] The abutment portion 222 may include a first abutment portion 2221 and a second abutment portion 2222 arranged on opposite sides of the main body portion 221, that is, the first abutment portion 2221 and the second abutment portion 2222 are spaced apart from each other, and abut different positions of the fixed tube 232 are respectively abutted by multiple abutment portions 222, which is beneficial to preventing stress concentration on the fixed tube 232 and preventing the fixed tube 232 from being punctured, cracked or scratched by the abutment portion 222.

[0105] In one embodiment, reference may be made to Figure 3 and Figure 4In order to prevent the abutting portion 222 from scratching or puncturing the fixed tube 232, the abutting portion 222 has a rounded abutting surface, and the abutting portion 222 uses its rounded abutting surface to abut the inner wall of the fixed tube 232. The rounded abutting surface means that the abutting surface is a smooth plane or a smooth arc surface, and there are no burrs or sharp edges on the rounded abutting surface, wherein the connection angle between the abutting surface and its adjacent surface can be a rounded corner.

[0106] You can refer to Figure 3 and Figure 4 The main body 221 abuts against the heating tube 21 , and the abutting portion 222 and the main body 221 may be integrally formed. Specifically, the abutting portion 222 may be formed by extending from the main body 221 along the radial direction of the heating tube 21 .

[0107] Please refer to Figure 4 The abutment portion 222 can be constructed to have a bend in the radial direction of the heating tube 21, and a smooth arc-shaped curved surface is formed at the bend of the abutment portion 222. That is, at least a part of the arc-shaped curved surface constitutes the abutment surface of the abutment portion 222.

[0108] On the one hand, the strength of the abutting portion 222 can be increased by folding the abutting portion 222 to prevent the abutting portion 222 from being deformed when abutting the fixed tube 232; on the other hand, the abutting portion 222 can be folded back to increase the abutting area between the abutting portion 222 and the fixed tube 232, which is helpful for protecting the fixed tube 232; and, since the thickness of the metal sheet making the electrical connector 22 does not exceed 5 mm, the cost is lowest and the process is simplest to form a smooth abutting surface with a larger area by folding the abutting portion 222.

[0109] In order to ensure that the fixed tube 232 can squeeze the detection head 261 inward, the projections of the electrical connector 22 and the detection head 261 at the upper end or lower end of the heating tube 21 do not overlap, so as to prevent the electrical connector 22 from affecting the force of the fixed tube 232 squeezing the temperature measuring element 26 or the detection head.

[0110] More specifically, the heating assembly 2 further includes a clamping space 24 disposed between the heating tube 21 and the fixed tube 232, wherein at least a portion of the electrical connector 22 is accommodated in the clamping space 24, and the electrical connector 22 abuts against the heating tube 21 in the clamping space 24, and an electrical connection is achieved through abutment. The clamping space 24 has an entrance for at least a portion of the electrical connector 22 to enter, for example, the upper end and / or the lower end of the clamping space 24 is open, and the entrance is formed at the open portion. Thus, in the process of forming the heating assembly 2, the heating tube 21 can be first combined with the fixed tube 232, and a clamping space 24 is formed between the fixed tube 232 and the heating tube 21, and then at least a portion of the electrical connector 22 is inserted into the clamping space 24 from the entrance of the clamping space 24, thereby maintaining at least a portion of the electrical connector 22 in the clamping space 24, and at the same time, the fixed tube 232 can squeeze the electrical connector 22, so that the electrical connector 22 and the heating tube 21 maintain stable electrical abutment. Compared with welding and other methods, the process is simpler, which is beneficial to improving production efficiency and reducing production costs.

[0111] The first layered component 231 defines a partial boundary of the clamping space 24 , and the clamping space 24 may be formed in a region between the heating tube 21 and the fixing tube 232 that is not covered by the first layered component 231 .

[0112] In one embodiment, the electrical connector is configured as a ring, surrounding the outer surface of the heating tube, or the electrical connector is configured as a tube, sleeved on the outer surface of the heating tube. Based on this, the upper edge and / or the lower edge of the first laminar component define the local boundary of the clamping space.

[0113] In another embodiment, reference may be made to Figure 3 and Figure 4 The first layered component 231 is provided with a second guide groove 2311 connected to the inlet of the first layered component 231. The extension direction of the second guide groove 2311 can be substantially parallel to the axial direction of the heating tube 21; the second guide groove 2311 can extend from the upper end of the first layered component 231 to the lower end of the first layered component 231, so that the upper end and the lower end of the first layered component 231 are connected, such as Figure 3 As shown; the second guide groove 231 may extend from the upper end or the lower end of the first layered member 231, and the extension length along the axial direction of the heating tube 21 may be less than the extension length of the first layered member 231 along the axial direction of the heating tube 21, as shown Figure 4 shown.

[0114] The second guide groove 2311 includes a first guide wall and a second guide wall that are arranged opposite to each other. The electrical connector 22 located in the clamping space 24 is accommodated between the first guide wall and the second guide wall. After the electrical connector enters the clamping space 24 through the entrance of the clamping space 24, it goes deeper into the clamping space 24 along the direction defined by the first guide wall and the second guide wall.

[0115] In an example, the first guide wall and the second guide wall can clamp the electrical connector 22 , which is helpful to keep the electrical connector 22 in the clamping space 24 .

[0116] In one example, refer to Figure 5 The electrical connector 22 includes a main body 221 and a first abutting portion 2221 and a second abutting portion 2222 both extending along the longitudinal direction of the heating tube 21. The main body 221 is used to electrically abut the heating tube 21. The first abutting portion 2221 and the second abutting portion 2222 are located on opposite sides of the main body 221 and are respectively arranged toward the first guide wall and the second guide wall. When the electrical connector 22 penetrates into the clamping space 24, the first abutting portion 2221 and the second abutting portion 2222 can slide in contact with the first guide wall and the second guide wall respectively. The cooperation between an abutment portion 2221 and a second abutment portion 2222 and the first guide wall and the second guide wall helps to more standardize the trajectory of the electrical connector 22 penetrating into the clamping space 24, and helps to prevent the electrical connector 22 from being partially embedded between the first layer component 231 and the heating tube 21 due to the trajectory deviation exceeding expectations in the process of penetrating into the clamping space 24, thereby affecting the stable connection between the first layer component 231 and the heating tube 21, and is also beneficial to improving the efficiency of assembling the electrical connector 22 into the clamping space 24.

[0117] In one example, the electrical connector 22 is loosely matched with the first guide wall and / or the second guide wall in the clamping space 24 to reduce the resistance encountered by the electrical connector 22 when it moves deeper into the clamping space 24 along the direction defined by the first guide wall and the second guide wall.

[0118] You can refer to Figure 5, the electrical connector 22 may further include a hooking portion 223. The hooking portion 223 can prevent the electrical connector 22 from moving along the clamping space 24 or limit the displacement of the electrical connector 22 along the clamping space 24. For example, when a portion of the electrical connector 22 is accommodated in the clamping space 24, in the process of electrically connecting the electrical connector 22 to the power supply component 3, the electrical connector 22 or the wire 25 or other conductive element electrically connected to the electrical connector 22 is usually pulled. At this time, the hooking portion 223 is stopped or hooked by other parts or components on the heating component 2 except the hooking portion 223, so that the electrical connector 22 cannot move along the clamping space 24 along the pulling direction, so that the hooking portion 223 helps to keep the electrical connector 22 in a preset position or limit the displacement of the electrical connector 22 along the clamping space 24, which is beneficial to preventing the heating component 2 from short-circuiting or ensuring the normal operation of the heating component 2.

[0119] In one embodiment, the hook portion 223 can help position the electrical connector 22, and help the electrical connector 22 to be combined with the heating tube 21 or accommodated in the clamping space 24 at a preset position. Figure 4 Since at least part of the clamping space 24 is blocked by the fixing tube 232, in order to facilitate the positioning of the electrical connector 22, the hook portion 223 is stopped outside the clamping space 24. The hook portion 223 can be used to prevent the electrical connector 22 from being improperly positioned in the clamping space 24 or from excessively entering the clamping space 24.

[0120] In one embodiment, the hooking portion 223 is hooked on the heating tube 21 or the fixing tube 232 , and the heating tube 21 or the fixing tube 232 hooks the hooking portion 223 to prevent the hooking portion 223 from moving along the clamping space 24 in an unexpected situation.

[0121] You can refer to Figure 2 and Figure 5 The hooking portion 223 may be integrally formed with the main body 221, and the hooking portion 223 may extend from the main body 221. The hooking portion 223 may include a first component 2231 extending along the radial direction of the heating tube 21, so that the first component 2231 may form a right-angle hook perpendicular to the axial direction of the heating tube 21 or may be inclined relative to the axial direction of the heating tube 21 to form an acute-angle hook, the heating tube 21 or the fixed tube 232 abuts against the first component 2231, and the first component 2231 is hooked on the heating tube 21 or the fixed tube 232, and the heating tube 21 or the fixed tube 232 may support the first component 2231 in the reverse direction of the electric connector 22 entering the clamping space 24, thereby preventing the electric connector 22 from moving along the clamping space 24, so that the electric connector 22 cannot enter the clamping space 24 further after entering a certain depth of the clamping space 24.

[0122] exist Figure 2and Figure 5 In the illustrated embodiment, the hook portion 223 further includes a second component 2232 bent relative to the first component 2231, the heating tube 21 or the fixed tube 232 is located between the second component 2232 and the main body 221, the second component 2232 extends along the axial direction of the heating tube 21, and the second component 2232 can be buckled on the heating tube 21 or the fixed tube 232. The second component 2232 can block the first component 2231 from moving toward the heating tube 21 along the radial direction of the heating tube 21, thereby ensuring that the first component 2231 is abutted and stopped by the heating tube 21 or the fixed tube 232. It should be noted that the second component 2232 is optional and not mandatory.

[0123] Please refer to Figure 2 The hook portion 223 can be arranged adjacent to the entrance of the clamping space 24, or the hook portion 223 can be stopped at the entrance of the clamping space 24, that is, the first component 2231 can be stopped and supported by at least a portion of the boundary of the entrance of the clamping space 24.

[0124] In one embodiment, the entrance of the clamping space is completely defined by the fixing tube, that is, a through hole may be opened on the tube wall of the fixing tube, and the through hole may be partially penetrated by the electrical connector, that is, the through hole may form the entrance of the clamping space.

[0125] In one embodiment, reference may be made to Figure 2 , the entrance of the clamping space 24 is formed at the end of the fixed tube 232, so that the end of the fixed tube 232 and the heating tube 21 respectively define a part of the entrance of the clamping space 24. The heating component 2 can have one or more electrical connectors 22, based on which, the heating component 2 can have one or more clamping spaces 24. When the entrance of one of the clamping spaces 24 is set at the upper end of the fixed tube 232, the upper end of the fixed tube 232 or the upper end of the heating tube 21 can support the hook portion 223 upward, and the wire 25 electrically connected to the electrical connector 22 can pass through the lower end of the clamping space 24, so that when the wire 25 is pulled downward, the hook portion 223 is blocked, which can prevent the electrical connector 22 from being pulled to move downward, thereby ensuring that when the wire 25 is pulled downward, the electrical connector 22 can be stably maintained in the original position.

[0126] Alternatively, in other embodiments, reference may be made to Fig. 9 The heating assembly 2 further includes an end cap 27. The end cap 27 is connected to the heating tube 21, and can be connected to the upper end of the heating tube 21, or can be connected to the lower end of the heating tube 21; there can be two end caps 27, and the two end caps 27 are respectively connected to the upper end and the lower end of the heating tube 21. The hook portion 223 is hooked on the end cap 27, and the end cap 27 blocks and supports the hook portion 223 in the reverse direction of the electrical connector 22 entering the clamping space 24.

[0127] Alternatively, in other embodiments, a bracket different from the end cap and the fixing tube may be provided on the heating assembly, and the hooking portion is hooked on the bracket so as to be stopped and supported to prevent the electrical connector from moving along the clamping space.

[0128] The first layered component 231 can be first arranged on the periphery of the heating tube 21 with the fixed tube 232, which not only helps to expose the first position and the second position of the outer surface of the heating tube 21 to the first guide groove 2312, but also ensures that the first layered component 231 forms a stopper adjacent to the second position to ensure that the detection head 261 moving along the first guide groove 2312 can accurately reach the second position.

[0129] In order to facilitate the fixing tube 232 to be sleeved on the periphery of the first layer component 231 , the inner diameter of the fixing tube 232 may be greater than or equal to the outer diameter of the first layer component 231 , or the fixing tube 232 may be elastic.

[0130] When the fixing tube 232 is tightened under the contact of the electrical connector 22 , at least a part of the first layer component 231 can be closely attached to the heating tube 21 . The fixing tube 232 can prevent the first layer component 231 from rotating relative to the heating tube 21 .

[0131] The first layered component 231 may include a heat-insulating layer made of a heat-insulating material. The heat-insulating material may include a heat-insulating material, which refers to a material having a thermal conductivity of less than 100 W / mK at 23° C. and a relative humidity of 50%, preferably less than 40 W / mK or less than 10 W / mK. For example, the heat-insulating material may include at least one of a PAEK material, a PI material, or a PBI material, wherein the PAEK material includes PEEK, PEKK, PEKEKK, or PEK material.

[0132] In order to facilitate the arrangement of the insulation material around the surface of the heating tube 21, the insulation material may include a flexible insulation material. For example, the insulation material may include at least one of thermal insulation silica gel, ceramic fiber cloth and aerogel. In one embodiment provided in the present application, the main component of the insulation material is SiO2 aerogel particles, wherein the SiO2 aerogel particles are a three-dimensional mesh nanostructured silica material with a porosity of up to 80-99.8% and a pore size range of 10-50nm. The air can hardly conduct heat in its pores, and its thermal conductivity is as low as 0.01W / (mK) at room temperature, so it has extremely low thermal conductivity, and the flexible insulation layer prepared using SiO2 aerogel particles has excellent thermal insulation effects.

[0133] The above-mentioned thermal insulation layer prepared by SiO2 aerogel particles is compounded with polymer materials through a special process to form a flexible thermal insulation layer, wherein the mass percentage content of SiO2 aerogel particles is greater than the mass percentage content of polymer materials. The polymer material includes at least one of PU (polyurethane), PTFE (polytetrafluoroethylene), melamine foam, and polymer resin. In an example provided in the present application, the thermal insulation material includes PU and SiO2 aerogel particles, and the mass percentage content of PU is 10% by mass, and the mass percentage content of SiO2 aerogel particles is 90%. The thermal conductivity range of the thermal insulation layer prepared using the above-mentioned thermal insulation material is 0.01-0.02W / mK. In another example provided in the present application, the thermal insulation material includes polymer resin and SiO2 aerogel particles. In mass percentage, the mass percentage content of polymer resin ranges from 1% to 30%, and the mass percentage content of SiO2 aerogel particles ranges from 1% to 99%. The thermal conductivity range of the thermal insulation layer prepared using the above-mentioned thermal insulation material is 0.02-0.026W / mK.

[0134] The above-mentioned insulation material is drawn into shape and die-cut into a sheet body with a suitable size. In the embodiment provided in the present application, the sheet body is flexible, so the sheet body can be wrapped around the outer periphery of the heating tube 21 to form an insulation layer with a heat preservation and heat insulation effect, and the operation is simple and convenient. In other optional implementations, the insulation material can be drawn to form a curled or tubular insulation layer, and the insulation layer has a certain elasticity, so the insulation layer can be directly sleeved on the outer periphery of the heating tube 21.

[0135] The insulation layer can be provided as one layer or multiple layers according to the requirements of the insulation effect. In one embodiment, the insulation layer is provided as a single layer to prevent the formation of gaps between the layers and prevent heat loss. The thickness of the insulation layer provided on the outer surface of the heating tube 21 is approximately in the range of 0.5 mm to 2 mm. It is understood that the thicker the insulation layer is, the better the insulation effect formed by the insulation layer. The thickness of the insulation layer provided on the outer surface of the heating tube 21 can be selected as any value between 0.5 mm and 2 mm according to the requirements of the insulation effect.

[0136] The thermal insulation layer surrounds the heating tube 21 in the circumferential direction. In one embodiment, the thermal insulation layer wraps around most of the outer surface of the heating tube 21. Since the thermal insulation layer is configured as a sheet, after the single-layer thermal insulation layer is wrapped around the outer surface of the heating tube 21, the thermal insulation layer needs to be fixed so that the thermal insulation layer can remain on the outer surface of the heating tube 21. For ease of operation, a backing adhesive can be provided on the surface of the thermal insulation layer facing the heating tube 21, and the thermal insulation layer is adhered to the outer surface of the heating tube 21 by the backing adhesive. When the thermal insulation layer is configured as multiple layers, the backing adhesive can be used to adhere the thermal insulation layer to the outer surface of the heating tube 21 and between the adjacent thermal insulation layers on both sides. It should be noted that the thermal insulation layer can also be fixed to the heating tube 21 in other ways, which are not listed here in this application.

[0137] The fixed tube 232 of any of the above embodiments can be made of high-temperature resistant PEEK (polyetheretherketone) material. In the preferred implementation provided in the present application, the above-mentioned fixed tube 232 can adopt PI (polyimide) tube, which is a thin-walled tube formed by stretching a homophenyl polyimide film. It has a thin thickness and a light texture, which is conducive to the overall miniaturization and lightweight design of the heating component.

[0138] In one embodiment, reference may be made to Fig.10 The heating assembly also includes an end cap 27 connected to the end of the heating tube 21. The end cap 27 has an anti-retraction portion, which is referred to as the No. 3 anti-retraction portion.

[0139] Specifically, the anti-retraction portion may include a second through hole formed on the end cover 27, through which the conductive pin 262 passes, and the conductive pin 262 has a bend adjacent to the second through hole, referred to as the third bend 2622. The third bend 2622 is located between the second through hole and the detection head 261, and the second through hole is configured to prevent the third bend 2622 from passing through, thereby preventing the detection head 261 from being displaced when the conductive pin 262 is pulled.

[0140] The third bend 2622 is disposed adjacent to the end cap 27, where “adjacent” includes contacting or being close to but not contacting.

[0141] In one example, the third bend 2622 provides a second step on the conductive pin 262, and the end cap 27 defining the second through hole supports the second step. Since the second step is contacted and supported by the end cap 27 defining the second through hole, when the conductive pin 262 is pulled on one side of the second through hole, the conductive pin 262 located on the other side of the second through hole can hardly be displaced, that is, the second through hole can prevent the conductive pin 262 from retreating and prevent the detection head 261 from moving away from the second position.

[0142] In one example, the third bend 2622 is arranged adjacent to the second through hole but has a certain amount of spacing between it and the second through hole. When the conductive pin 262 is pulled, the third bend 2622 can be deformed so that its bending degree is reduced, so that the conductive pin 262 can provide a retreat redundancy, so that the part of the conductive pin 262 away from the detection head 261 can retreat, while the part adjacent to the detection head 261 can basically remain motionless, thereby making the position of the detection head 261 remain unchanged when the conductive pin 262 is pulled.

[0143] Therefore, when the conductive pin 262 is pulled during the process of connecting the conductive pin 262 to the control board 31 , the third bend 2622 can prevent the detection head 261 of the temperature measuring element 26 from deviating from the second position.

[0144] In one embodiment, the conductive pin 262 may have at least one of the first bend, the second bend 2621 and the third bend 2622. In one embodiment, the first bend and the second bend 2621 may be combined into one. In one embodiment, the conductive pin 262 may also have other bends different from the first bend, the second bend 2621 and the third bend 2622, and the other bends may also be used to prevent the temperature measuring element 26 from moving along the first guide groove 2311.

[0145] In one embodiment, the anti-retraction portion includes a first anti-retraction portion and a second anti-retraction portion, the conductive pin 262 connects the first anti-retraction portion and the second anti-retraction portion, and the geometric connection line between the first anti-retraction portion and the second anti-retraction portion is inclined relative to the axial direction of the heating tube 21. For example, the first through hole 2321 and the second through hole are respectively the first anti-retraction portion and the second anti-retraction portion, and the geometric connection line between the first through hole 2321 and the second through hole is inclined relative to the axial direction of the heating tube 21, so as to further prevent the detection head 261 from deviating from the second position when the conductive pin 262 is pulled.

[0146] In one embodiment, a portion of the conductive pin 262 is wound into a spring-like spiral structure, so that when the conductive pin 262 is pulled, the spiral structure can provide an extension margin to reduce the pulling force on the detection head 261 .

[0147] In one embodiment, reference may be made to Figure 3 and Figure 4The electrical connector 22 includes a main body 221 and an abutting portion 222 extending from the main body 221 along the radial direction of the heating tube 21, and also includes a wire 25. The main body 221 is electrically abutted against the heating tube 21, and the abutting portion 222 is abutted against 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, the wire 25 is electrically connected to the main body 221, and at least a part of the wire 25 is accommodated 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 through the wire 25.

[0148] For more details, please refer to Figure 4 The main body 221 may include a spring sheet 2212 and a connecting portion 2211 electrically connected to the wire 25. The wire 25 may be electrically connected to the connecting portion 2211 by welding. The main body 221 uses the spring sheet 2212 to elastically abut against the heating tube 21 to ensure that the electrical connection between the main body 221 and the heating tube 21 is stable. Figure 4 In the example shown, the spring piece 2212 includes a V-shaped spring arm A and an electrical contact B arranged at the V-shaped corner of the spring arm A, and the electrical contact B protrudes toward the heating tube 21, so that the spring arm A provides an elastic force for the electrical contact B to electrically abut against the heating tube 21.

[0149] In one embodiment, there is only one induction coil or electric heating element 213 on the heating tube 21, so there may be at least two electric connectors 22, one is a positive electric connector and the other is a negative electric connector. The positive electric connector and the negative electric connector are electrically connected to the opposite ends of the induction coil or electric heating element 213, respectively. Based on this, in one example, the first layered component 231 has two second guide grooves 2311 that are independent of each other and not connected to each other, and the positive electric connector and the negative electric connector are arranged in different second guide grooves 2311, respectively. In another example, the first layered component 231 has a second guide groove 2311 that runs through the upper and lower ends of the first layered component 231, and the positive electric connector and the negative electric connector are inserted into the second guide groove 2311 from top to bottom and from bottom to top, respectively, and are located at the upper and lower sides of the second guide groove 2311, respectively.

[0150] In one embodiment, reference may be made to Figure 3 and Figure 7 and 8 There are multiple induction coils or electric heating elements 213 on the heating tube 21, so there can be at least three electrical connectors 22, one of which can be a common electrical connector that can be electrically connected to multiple induction coils or electric heating elements 213 at the same time, and the remaining electrical connectors 22 are electrically connected to multiple induction coils or electric heating elements 213 one by one, and the number of second guide grooves 2311 on the first layered component 231 is not more than the number of electrical connectors 22. For example, Figure 3 and Figure 7 and 8 As shown, there are two induction coils or electric heating elements 213 on the heating tube 21, there can be three electrical connectors 22, there can be two second guide grooves 2311 on the first layered component 231, one is a long second guide groove running through the upper and lower ends of the first layered component 231, and the other second guide groove can be a short second guide groove, the short second guide groove and the long second guide groove are independent of each other, the two electrical connectors 22 are respectively arranged on the upper and lower sides of the long second guide groove, the common electrical connector is arranged in the short second guide groove, and the axial extension length of the short second guide groove along the heating tube 21 is shorter than the axial extension length of the long second guide groove along the heating tube 21.

[0151] When the first electrical connector and the second electrical connector are arranged in the same first guide groove 2311 and the first electrical connector is arranged above the second electrical connector, the setting of the hook portion 232 on the first electrical connector can prevent the first electrical connector from further entering the clamping space 24 when the wire 25 connected to the first electrical connector is pulled downward, causing the first electrical connector to contact the second electrical connector and cause a short circuit.

[0152] When the electric heating element 213 includes a first electric heating element and a second electric heating element arranged upper and lower, the first electric heating element is electrically connected to the first electric connector, the second electric heating element is electrically connected to the second electric connector, 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 setting of the hook portion 232 on the first electric connector can prevent the first electric connector from further entering the clamping space 24 when the wire 25 connected to the first electric connector is pulled downward, causing the first electric connector to be electrically connected to the first electric heating element and the second electric heating element at the same time, thereby causing the heating component 2 to work abnormally.

[0153] In the above-mentioned heating assembly and aerosol generating device, the detection head of the temperature measuring element is elastic, and the detection head can elastically abut the heating tube or the fixed tube, so that the detection head can be stably maintained between the heating tube and the fixed tube and the detection head can be close to the heating tube. Compared with welding to keep the detection head connected to the heating tube, it can better protect the surface of the heating tube from being damaged and can more easily combine the temperature measuring element with the heating tube.

[0154] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heating component, characterized in that: include: a heating tube having a heating chamber therein for at least partially housing the aerosol-generating article; A temperature measuring element, comprising a detection head and a conductive pin connected to the detection head, wherein the detection head contacts the outer surface of the heating tube; and A fixed tube, arranged at least partially around the periphery of the heating tube; Wherein, the detection head is located between the heating tube and the fixed tube, and the detection head is elastic and elastically abuts against the heating tube or the fixed tube.

2. The heating assembly according to claim 1, characterized in that The detection head includes a heat-conducting element and an elastic member combined with the heat-conducting element, the heat-conducting element is closely attached to the heating tube, and the elastic member elastically abuts against the heating tube or the fixing tube.

3. The heating assembly according to claim 1, characterized in that The detection head comprises a heat-conducting element, the heat-conducting element is provided with an elastic arm, and the elastic arm elastically abuts against the heating tube or the fixing tube.

4. The heating assembly according to claim 1, characterized in that The detection head comprises a heat-conducting element, the heat-conducting element is closely attached to the heating tube, and the conductive pin comprises a first thermocouple wire and a second thermocouple wire; The first thermocouple wire and the second thermocouple wire are electrically connected to each other to form a thermocouple, and a hot end of the thermocouple is connected to the heat conducting element; or The heat-conducting element includes a conductor, and the first thermocouple wire and the second thermocouple wire are electrically connected through the conductor to form a thermocouple.

5. The heating assembly according to claim 4, characterized in that At least one of the heating tube and the heat conducting element has an insulating layer on its surface.

6. The heating assembly according to claim 1, characterized in that The detection head includes a first abutting portion and a second abutting portion, the first abutting portion abuts against the heating tube, the second abutting portion includes an elastic arm, and the elastic arm abuts against the fixing tube.

7. The heating assembly according to claim 5, characterized in that An accommodating space is defined between the first abutting portion and the second abutting portion, and an end portion of the conductive pin is accommodated in the accommodating space.

8. The heating assembly according to claim 7, characterized in that A window is formed on the second abutting portion for a welding laser or a welding head to pass through, and the window is communicated with the accommodating space and is arranged opposite to the end of the conductive pin.

9. The heating assembly according to claim 5, characterized in that The first abutting portion includes a first abutting surface that abuts against the heating tube in at least a partial area, and at least a partial edge of the first abutting surface bends and extends toward a direction where the second abutting portion is located.

10. The heating assembly according to claim 9, characterized in that At least a partial area of ​​the first abutting surface is an arc-shaped surface that fits the outer surface of the heating tube.

11. The heating assembly according to claim 5, characterized in that The elastic arm comprises a cantilever with a free end, the free end of the cantilever is bent and extended toward the direction of the first abutting portion, so that an arc-shaped second abutting surface is formed on the surface of the second abutting portion, and the second abutting surface abuts the fixing tube.

12. The heating assembly according to claim 1, characterized in that The conductive pin has a bending portion, and the heating component further includes an anti-retraction portion, which is configured to stop the bending portion.

13. The heating assembly according to claim 12, characterized in that The anti-retraction portion includes a first through hole disposed on the fixing tube and through which the detection head can pass, and at least a part of the bending portion is formed in the first through hole.

14. The heating assembly according to claim 12, characterized in that The heating assembly further comprises a first layered component disposed between the heating tube and the fixing tube, wherein the first layered component has a first guide groove; The heating tube has a first position and a second position contacting the detection head on its surface, the first guide groove connects the first position and the second position, and the conductive pin has the bending portion at the first position or close to the first position.

15. The heating assembly according to claim 14, characterized in that The second position is exposed in the first guide groove, and the detection head is stopped by an extension end point of the first guide groove when at the second position.

16. The heating assembly according to claim 14, characterized in that The first position is exposed in the first guide groove, and 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.

17. The heating assembly according to claim 14, characterized in that The width of the first guide groove is greater than or equal to the width of the temperature measuring element.

18. The heating assembly according to claim 14, characterized in that The first layer component comprises an insulating layer.

19. The heating assembly according to claim 12, characterized in that The heating assembly also includes an end cap connected to the end of the heating tube, the anti-retraction portion includes a second through hole arranged on the end cap and passed by the conductive pin, and the bending portion is arranged adjacent to the end cap and located between the end cap and the detection head.

20. The heating assembly according to claim 1, characterized in that The heating assembly also includes an electrical connector electrically connected to the heating tube, wherein at least a portion of the electrical connector is disposed between the heating tube and the fixed tube, and the electrical connector abuts against the fixed tube to provide a tensioning force for tightening the fixed tube, and the fixed tube is configured to squeeze the detection head radially inward along the heating tube under the action of the tensioning force.

21. An aerosol generating device, characterized in that: The heating component comprises the heating component according to any one of claims 1 to 20, and also comprises a power supply component for providing power supply to the heating component.

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