Aerosol generating apparatus for heated tobacco product

Abstract

The present application discloses an aerosol generating apparatus for a heated tobacco product. The aerosol generating apparatus comprises a heating structure, a wire, a first graphite structure, and a second graphite structure. The first graphite structure and the second graphite structure are stacked such that airflow can enter an airflow channel of the first graphite structure via the second graphite structure. The first graphite structure is further provided with an accommodation cavity for accommodating the heating structure, and the second graphite structure is provided with a first end part adjacent to the first graphite structure. One end of the wire is connected to the heating structure, and the other end of the wire either passes through an edge of the first end part of the second graphite structure to an outer side, or passes through a wiring through-hole on the second graphite structure to the outer side, the wiring through-hole being offset from a central axis of the accommodation cavity. Thus, the wire is prevented from being routed under the accommodation cavity of the first graphite structure, reducing the adhesion of diffused aerosol to the wire, thereby mitigating carbon buildup below the accommodation cavity of the first graphite structure, ensuring that the whole air channel remains unobstructed, and allowing airflow to smoothly enter the airflow channel.

Description

Heated cigarette aerosol generating device Technical Field

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

[0002] Smoking articles (e.g., cigarettes, cigars, etc.) burn tobacco to produce tobacco smoke during use. For people to smoke, during the combustion process, while the smoking articles volatilize active ingredients such as nicotine, they also produce tar, carbon monoxide and other toxic and carcinogenic substances due to incomplete combustion and other reasons. These substances have been proven to be the main cause of health problems for smokers. Attempts have been made to provide alternatives to these tobacco-burning articles by producing products that release compounds such as nicotine without burning to reduce the harm of smoking. An example of such a product is the so-called heat-not-burn product, which releases active compounds such as nicotine by heating the smoking article instead of burning it. Since it does not burn, the content of tar, carbon monoxide and other toxic and carcinogenic substances in the flue gas will be greatly reduced.

[0003] Examples of such products are heating devices, which release compounds by heating rather than burning materials. They heat aerosol articles to produce an aerosol that can be inhaled.

[0004] In the existing technology, during use, the aerosol generated after heating will diffuse in the entire heating device, and the heating structure needs to be connected to the power supply unit or other functional units through wires. The diffused aerosol will slowly adhere to the wires, and then carbon deposits will form lumps and block the air intake space, affecting the air intake and causing the entire heating device to be unable to be used normally.

[0005] Summary of the Invention

[0006] The purpose of this application is to provide a heated cigarette aerosol generating device to solve the problems existing in the above-mentioned background technology.

[0007] To achieve the above objectives, this application is implemented through the following technical solutions:

[0008] A heated cigarette aerosol generating device comprises a heating structure, a conductive wire, a first graphite structure, and a second graphite structure; the first graphite structure comprises a accommodating cavity and an airflow channel; the second graphite structure comprises a first end portion adjacent to the first graphite structure; the heating structure is arranged in the accommodating cavity, and the heating structure can heat the airflow passing through the airflow channel by heat transfer through the first graphite structure; the first graphite structure and the second graphite structure are stacked, and the airflow can enter the airflow channel through the second graphite structure; one end of the conductive wire is connected to the heating structure, and the other end passes through the edge of the first end portion to the outside of the second graphite structure, or the other end passes through a wiring through hole on the second graphite structure to the outside of the second graphite structure, wherein the axis of the wiring through hole deviates relative to the central axis of the accommodating cavity.

[0009] In some embodiments, a gap exists between the first graphite structure and the second graphite structure.

[0010] In some embodiments, the wiring gap is further included for the wire to pass through; the first graphite structure includes a second end adjacent to the second graphite structure; the wiring gap is arranged on the edge of the first end; and / or the wiring gap is arranged on the edge of the second end.

[0011] In some embodiments, the first graphite structure includes a wiring groove and a second end; the second end is adjacent to the second graphite structure; the wiring groove is arranged at the second end so that the wire can pass through the wiring gap and connect to the heating structure along the wiring groove.

[0012] In some embodiments, the second graphite structure includes an air flow outlet; the accommodating cavity is arranged in the central area of ​​the first graphite structure; two or more air flow channels are arranged around the accommodating cavity; the air flow outlet is arranged on the first end, adjacent to the first graphite structure; the air flow outlet covers the inlets of all the air flow channels and is connected to the inlets of the air flow channels.

[0013] In some embodiments, a base is further included; the base includes an annular wall, an axial air outlet hole and a lateral air inlet hole; the second graphite structure is located between the first graphite structure and the base; the annular wall has a hollow first cavity; the lateral air inlet hole is arranged on the annular wall and is connected to the first cavity, so that the air flow can enter the first cavity from the lateral air inlet hole and then enter the second graphite structure through the axial air outlet hole.

[0014] In some embodiments, the base further includes an axial air inlet hole; the axial air inlet hole is opposite to the axial air outlet hole and is connected to the first cavity, so that the air flow can enter the first cavity from the axial air inlet hole and then pass through the axial air outlet hole into the second graphite structure.

[0015] In some embodiments, the second graphite structure further includes a third end portion; the third end portion is adjacent to the base; and a gap is formed between the third end portions, so that airflow can directly enter the second graphite structure from the gap.

[0016] In some embodiments, a fixing member is further included; the fixing member movably connects the first graphite structure and the second graphite structure together.

[0017] In some embodiments, an annular tube is also included; the fixing member includes a first clamping portion, a second clamping portion and an axial limit member; the first clamping portion and the second clamping portion jointly clamp the first graphite structure and the second graphite structure; the annular tube is sleeved on the fixing member, so that the first clamping portion and the second clamping portion cooperate to limit the radial position of the second graphite structure relative to the first graphite structure; the axial limit member is fixed to the first clamping portion and / or the second clamping portion, and abuts against the end of the second graphite structure, thereby limiting the axial position of the second graphite structure relative to the first graphite structure.

[0018] In some embodiments, the fixing member further includes an extended support foot; the extended support foot extends from the first clamping portion and / or the second clamping portion and abuts against the base, thereby forming a gap between the base and the second graphite structure for airflow to pass through.

[0019] In some embodiments, a temperature measuring element is further included; the second graphite structure includes a base and a side wall; the side wall extends from the base toward the first graphite structure, and a second cavity is formed between the side wall and the base; the temperature measuring element is arranged on the base, and the probe part of the temperature measuring element faces the first graphite structure.

[0020] An embodiment of the present application provides an aerosol generating device, comprising a heating structure, a wire, a first graphite structure, and a second graphite structure. The first graphite structure and the second graphite structure are stacked so that the airflow can pass through the second graphite structure into the airflow channel of the first graphite structure. The first graphite structure also has a housing for accommodating the heating structure. One end of the wire is connected to the heating structure. The other end of the wire passes through the edge of the end of the second graphite structure to the outside, or the other end passes through a routing hole on the second graphite structure that deviates from the central axis of the housing cavity to the outside. This prevents the wire from being routed below the housing cavity of the first graphite structure, reduces the amount of diffuse aerosol adhering to the wire, and thus slows down the carbon deposition below the housing cavity of the first graphite structure, keeping the entire airway unobstructed and allowing the airflow to smoothly enter the airflow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0022] FIG1 is a schematic structural diagram of an aerosol generating device provided in one embodiment of the present application, wherein a cigarette is in an inserted state.

[0023] FIG2 is a schematic diagram of the structure of an aerosol generating device provided in an embodiment of the present application, wherein the cigarette is in a taken-out state.

[0024] FIG3 is a cross-sectional view of an aerosol generating device provided by an embodiment of the present application, wherein a wire is passed through the end edge of the second graphite structure to the outside.

[0025] FIG4 is a partial enlarged schematic diagram of point A in FIG3 .

[0026] FIG5 is a structural exploded view of a fixing member, a first graphite structure, a second graphite structure, and a base provided in an embodiment of the present application.

[0027] FIG6 is a structural exploded view of a fixing member, a first graphite structure, a second graphite structure, and a base provided in an embodiment of the present application.

[0028] FIG7 is a cross-sectional view of an aerosol generating device provided in one embodiment of the present application, wherein the second graphite structure has a wiring through-hole for a wire to pass through.

[0029] FIG8 is a partial enlarged schematic diagram of point B in FIG7 .

[0030] FIG9 is a cross-sectional view of an aerosol generating device provided in one embodiment of the present application, wherein a gap is provided between the first graphite structure and the second graphite structure for a wire to pass through.

[0031] FIG10 is a partially enlarged schematic diagram of point C in FIG9 .

[0032] The accompanying drawings are numbered as follows: 100, cigarette; 200, outer shell; 30, heating structure; 40, first graphite structure; 41, accommodating chamber; 42, air flow channel; 43, wiring groove; 50, second graphite structure; 51, base; 511, air flow outlet; 512, air flow inlet; 52, side wall; 521, through hole; 53, temperature measuring element; 54, wiring through hole; 60, base; 61, annular wall; 62, lateral air inlet through hole; 63, axial air outlet through hole; 64, axial air inlet through hole; 70, fixing part; 71, first clamping part; 72, second clamping part; 73, axial limit part; 80, annular tube; 81, fixing protrusion; 90, wire. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] The terms "first", "second" and "third" in this application are only used for descriptive purposes and cannot be understood as indicating or suggesting the quantity or order of the technical features indicated relative to importance or implicitly indicating the indicated technical features. 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 situation between the various components under a certain specific posture (as shown in the accompanying drawings). 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 that includes 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.

[0035] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be one or more intermediate elements in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0037] Referring to Figures 1-10, an embodiment of the present application provides an aerosol generating device, comprising a heating structure 30, a wire 90, a first graphite structure 40, and a second graphite structure 50. The heating structure 30 is disposed within the accommodating cavity 41 of the first graphite structure 40, thereby heating the first graphite structure 40, and then the heat is transferred from the first graphite structure 40 to the air flow channel 42 disposed in the first graphite structure 40. When the air flow passes through the air flow channel 42, the air flow can be heated to a high-temperature air flow, which can heat the aerosol generating article to produce an aerosol for inhalation. The heating structure 30 can be connected to a power supply unit or other functional units via the wire 90. The wire 90 is connected to the heating structure 30 from the outside of the second graphite structure 50. Compared to other wiring methods, such as center wiring, routing the wire 90 outside the first graphite structure 40 reduces the risk of aerosol adhering to it because the wire 90 does not pass under the receiving cavity 41 of the first graphite structure 40, thereby reducing carbon deposition and thus reducing the blockage of the air intake space caused by carbon deposition. This can extend the expected service life of the aerosol generating device of the present embodiment.

[0038] Specifically, referring to the embodiment of Figures 3 and 4 , one end of the wire is connected to the heating structure, and the other end passes through the edge of the second graphite structure 50 adjacent to the first end of the first graphite structure 40 to the outside of the second graphite structure. In other words, the wire is routed from the first graphite structure 40 to the outside of the second graphite structure 50. Alternatively, referring to the embodiment of Figures 7 and 8 , one end of the wire 90 is connected to the heating structure, and the other end passes through the routing hole 54 in the second graphite structure 50 to the outside of the second graphite structure 50. The axis of the routing hole 54 is offset from the central axis of the accommodating cavity 41. Because the routing hole 54 is offset from the central axis of the accommodating cavity 41, the wire 90 does not route below the first graphite structure 40. This prevents the wire 90 from being routed below the first graphite structure 40 during use, thereby preventing it from affecting the patency of the entrance to the airflow channel 42. If the wire is routed below, carbon deposits will form on the wire 90 below the accommodating cavity after it is attached to the aerosol, thereby blocking the entrance to the airflow channel 42. Secondly, the wires 90 located in the lower cavity are more likely to be contaminated by aerosols than the wires 90 routed on the outside, thereby aggravating the carbon deposition.

[0039] In some embodiments, referring to Figures 3-6, a through hole 521 for limiting is provided on the first graphite structure 40 and / or the second graphite structure 50. The through hole 521 can limit the position of the wire 90 to a certain extent, allowing the wire 90 to be routed from the outside of the first graphite structure 40 rather than underneath it. The through hole 521 can be provided on the side wall 52 of the first graphite structure 40, or on the first end edge of the second graphite structure 50 adjacent to the first graphite structure 40. The through hole 521 can also be provided on both the side wall 52 and the first end edge of the first graphite structure 40, as long as the through holes 521 located on the first and second graphite structures 40 align when the two graphite structures are stacked.

[0040] 9 and 10 , a gap is provided between the first graphite structure 40 and the second graphite structure 50 for a wire 90 to pass through. One end of the wire is connected to the heating structure, and the other end passes through the gap and out from the edge of the first end of the second graphite structure 50.

[0041] In some embodiments, as shown in FIG6 , a wiring groove 43 is provided at the second end of the first graphite structure 40 near the second graphite structure 50. A wire 90 can pass through the wiring notch and connect to the heating structure 30 along the wiring groove 43. This wiring groove 43 serves to position the wire 90. Furthermore, because the wire 90 is located within the wiring groove 43, the contact area between the wire 90 and the aerosol is reduced, further mitigating aerosol adhesion to the wire 90.

[0042] In some embodiments, referring to Figures 3, 4, and 6, a receiving chamber 41 is provided in the central area of ​​the first graphite structure 40, and two or more airflow channels 42 are arranged around the receiving chamber 41. The heating structure 30 located in the receiving chamber 41 can heat the airflow passing through the airflow channel 42 through the first graphite structure 40. When the first graphite structure 40 and the second graphite structure 50 are stacked, the airflow outlet 511 of the second graphite structure 50 is provided adjacent to the first end of the first graphite structure 40. The airflow outlet 511 can cover the entrances of all airflow channels 42 and be connected to the airflow channels 42, so that the entrances of the airflow channels 42 will not be blocked by the second graphite structure 50, thereby ensuring smooth airflow.

[0043] In some embodiments, referring to Figures 3-6, a base 60 is also included. The base 60 includes an annular wall 61, an axial air outlet hole 63, and a lateral air inlet hole 62. The annular wall 61 has a hollow first cavity, and the lateral air inlet hole 62 is provided on the annular wall 61 and communicates with the first cavity. The axial air outlet hole 63 is adjacent to the third end of the second graphite structure 50. The air flow can enter the first cavity from the lateral air inlet hole 62 and then enter the second graphite structure 50 through the axial air outlet hole 63, and then enter the first graphite structure 40 from the air flow outlet at the first end of the second graphite structure 50. This channel route can serve as the first air inlet air flow channel 42.

[0044] In some embodiments, referring to Figures 5 and 6, the lateral air intake holes 62 are in the shape of vertical strips, which extend along the axial direction of the second graphite structure 50. The vertical strip-shaped lateral air intake holes 62 can further slow down the accumulation of carbon deposits. Due to the gravity of the carbon deposits and other reasons, the carbon deposits at the bottom of the lateral air intake holes 62 are more serious than those at the top of the lateral air intake holes 62. The arrangement of the vertical strip-shaped lateral air intake holes 62 allows for more ventilation space in the axial direction. Even if the carbon deposits block the bottom of the lateral air intake holes 62, the top of the lateral air intake holes 62 can still remain unobstructed.

[0045] In some embodiments, as shown in Figures 3-6 , the base 60 further includes an axial air inlet hole 64 opposite the axial air outlet hole 63. This axial air inlet hole 64 communicates with the first cavity. Airflow can enter the first cavity through the axial air inlet hole 64 and then pass through the axial air outlet hole 63 to the airflow inlet 512 at the third end of the second graphite structure 50. This channel route can serve as the second air inlet channel 42.

[0046] In some embodiments, referring to FIG4 , the second graphite structure 50 is disposed between the first graphite structure 40 and the base 60 . A gap is defined at the third end between the base 60 and the second graphite structure 50 , through which airflow can flow directly into the second graphite structure 50 . This gap serves as the third inlet airflow channel 42 .

[0047] In some embodiments, referring to FIG. 3-6 , the first graphite structure 40 and the second graphite structure 50 are movably connected together via a fixing member 70 .

[0048] In some embodiments, referring to Figures 3-6 , the first clamping portion 71 and the second clamping portion 72 of the fixing member 70 jointly clamp the first graphite structure 40 and the second graphite structure 50. The fixing member 70 also includes an axial stopper 73, which abuts the third end of the second graphite structure 50, thereby limiting the axial position of the second graphite structure 50 relative to the first graphite structure 40. The axial stopper 73 can be located only on the first graphite structure 40 or the second graphite structure 50, or on both the first graphite structure 40 and the second graphite structure 50. The embodiment shown in Figures 5-6 shows an embodiment in which the two stoppers are located on the first graphite structure 40 and the second graphite structure 50, respectively. When the first clamping portion 71 and the second clamping portion 72 clamp the first graphite structure 40 and the second graphite structure 50 together, the fixing member 70 together with the first graphite structure 40 and the second graphite structure 50 are sheathed by an annular tube 80, so that the first clamping portion 71 and the second clamping portion 72 cooperate to limit the radial position of the second graphite structure 50 relative to the first graphite structure 40.

[0049] In some embodiments, the fixing member 70 further includes extended support legs that extend from the first clamping portion 71 and / or the second clamping portion 72 and abut against the base 60, thereby forming a gap between the base 60 and the second graphite structure 50 for airflow. The extended support legs may extend from either the first clamping portion 71 or the second clamping portion 72, or both. In the embodiment shown in Figures 5-6, two extended support legs extend from the first clamping portion 71 and the second clamping portion 72, respectively.

[0050] In some embodiments, as shown in FIG5 , a temperature measuring element 53 is further included, and the temperature measuring element is arranged on the second graphite structure 50. Specifically, the second graphite structure 50 includes a base 51, and a side wall 52 extends from the base 51 toward the first graphite structure 40, and a second cavity for airflow to pass through is formed between the base 51 and the side wall 52. The temperature measuring element 53 is arranged on the base 51, and its probe portion is facing the first graphite structure 40. In this way, when the user inhales, the airflow flows from the second cavity of the second graphite structure 50 into the airflow channel 42 of the first graphite structure 40. At this time, due to the flow of the airflow, the temperature of the newly inhaled airflow is lower, and the temperature detected by the probe portion of the temperature measuring element 53 will change significantly, thereby being able to detect the number of puffs. The temperature measuring element 53 includes but is not limited to a thermocouple.

[0051] In some embodiments, as shown in Figure 4 , the annular tube 80 includes a fixing protrusion. The fixing protrusion 81 protrudes inward from the inner wall of the annular tube 80, dividing the receiving cavity of the annular tube 80 into a first cavity and a second cavity. The first cavity can be used to accommodate an aerosol-generating product, such as a cigarette 100. The fixing member 70, the first graphite structure 40, and the second graphite structure 50 are located in the second cavity. During installation, the end surface of the fixing member 70 abuts the fixing protrusion 81.

[0052] It should be noted that the specification and drawings of this application provide preferred embodiments of the present application, but are not limited to the embodiments described in this specification. Furthermore, it is possible for a person skilled in the art to make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A heating cigarette aerosol generating device, characterized in that, it includes a heating structure, a wire, a first graphite structure and a second graphite structure; the first graphite structure includes a receiving cavity and an air flow channel; the second graphite structure includes a first end adjacent to the first graphite structure; the heating structure is arranged in the receiving cavity, and the heating structure heats the air flow passing through the air flow channel by heat transfer through the first graphite structure; the first graphite structure and the second graphite structure are stacked, and the air flow enters the air flow channel through the second graphite structure; one end of the wire is connected to the heating structure, and the other end passes to the outside of the second graphite structure through the edge of the first end, or the other end passes to the outside of the second graphite structure through a wire routing through hole on the second graphite structure, wherein the axis of the wire routing through hole deviates from the central axis of the receiving cavity.

2. The heating cigarette aerosol generating device according to claim 1, characterized in that, there is a gap between the first graphite structure and the second graphite structure.

3. The heating cigarette aerosol generating device according to claim 1, characterized in that, it further includes a wire routing notch for the wire to pass through; the first graphite structure includes a second end adjacent to the second graphite structure; the wire routing notch is arranged on the edge of the first end; and / or the wire routing notch is arranged on the edge of the second end.

4. The heating cigarette aerosol generating device according to claim 3, characterized in that, the first graphite structure includes a wire routing groove, and the wire routing groove is arranged at the second end, so that the wire passes through the wire routing notch and is connected to the heating structure along the wire routing groove.

5. The heating cigarette aerosol generating device according to claim 1, characterized in that, the second graphite structure includes an air flow outlet; the receiving cavity is arranged in the central area of the first graphite structure; two or more of the air flow channels are arranged around the receiving cavity; the air flow outlet is arranged on the first end, adjacent to the first graphite structure; the air flow outlet covers the inlets of all the air flow channels and is communicated with the inlets of the air flow channels.

6. The heating cigarette aerosol generating device according to claim 1, characterized in that, it further includes a base; the base includes an annular wall surface, an axial air outlet through hole and a lateral air inlet through hole; the second graphite structure is located between the first graphite structure and the base; the annular wall surface has a hollow first cavity; the lateral air inlet through hole is arranged on the annular wall surface and is communicated with the first cavity, so that the air flow can enter the first cavity from the lateral air inlet through hole and then enter the second graphite structure through the axial air outlet through hole.

7. The heating cigarette aerosol generating device according to claim 6, characterized in that, the base further includes an axial air inlet through hole; the axial air inlet through hole is opposite to the axial air outlet through hole and is communicated with the first cavity, so that the air flow can enter the first cavity from the axial air inlet through hole and then enter the second graphite structure through the axial air outlet through hole.

8. The heated roll aerosol generating device according to claim 6, wherein, the second graphite structure further includes a third end portion; the third end portion is adjacent to the base; there is a gap between the base and the third end portion, so that air flow can directly enter the second graphite structure from the gap.

9. The heated roll aerosol generating device according to any one of claims 1-8, wherein, it further includes a fixing member; the fixing member movably connects the first graphite structure and the second graphite structure together.

10. The heated roll aerosol generating device according to claim 9, wherein, the fixing member includes a first clamping portion, a second clamping portion and an axial limiting member; the first clamping portion and the second clamping portion jointly clamp the first graphite structure and the second graphite structure; it further includes an annular tube sleeved on the fixing member, so that the first clamping portion and the second clamping portion cooperate to limit the radial position of the second graphite structure relative to the first graphite structure; the axial limiting member is fixed to the first clamping portion and / or the second clamping portion, and abuts against the second graphite structure, so as to limit the axial position of the second graphite structure relative to the first graphite structure.

11. The heated roll aerosol generating device according to claim 10, wherein, the fixing member further includes an extended support leg; the extended support leg extends from the first clamping portion and / or the second clamping portion and abuts against the base, so as to form a gap for air flow to pass through between the base and the second graphite structure.

12. The heated roll aerosol generating device according to any one of claims 1-8, wherein, the second graphite structure includes a pedestal and a side wall; the side wall extends from the pedestal towards the first graphite structure, and a second cavity is formed between the side wall and the pedestal; it further includes a temperature measuring element; the temperature measuring element is arranged on the pedestal, and the probe part of the temperature measuring element faces the first graphite structure.

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