Heating device

Abstract

The invention discloses a heating device which is used for heating a non-combustible cigarette and comprises a first heating body, a heat insulation pipe and a second heating body which are sequentially arranged in the cigarette inserting direction, the first heating body is provided with a first resistance heating body, and the second heating body is provided with a second resistance heating body connected with the first resistance heating body in series. The resistance value of the first resistance heating body is larger than that of the second resistance heating body, so that the temperature of the first heating body is higher than that of the second heating body in the working process, and the first resistance heating body and the second resistance heating body can heat cigarettes in the inner cavities of the first heating body and the second heating body. The first heating body and the second heating body are separated through the heat insulation pipe, so that a non-uniform temperature field is formed when the whole heating device works, and the fragrance performance of the heated cigarette is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heated cigarettes, and in particular to a heating device. Background Art

[0002] The temperature of the smoke cone of traditional cigarettes is the highest at the center. The temperature gradually decreases from the center of the smoke cone to the outside, forming an uneven temperature field. In this uneven temperature field, the high temperature area accounts for the smallest proportion. It is precisely because of this uneven temperature field that the aroma of traditional cigarettes is very rich.

[0003] Heat-not-burn cigarettes are an important new type of tobacco product. Instead of directly burning cigarettes, they heat tobacco materials through external heat sources to generate smoke, which allows smokers to achieve a physiologically satisfying smoking effect. However, the heated area of ​​the tobacco in existing heat-not-burn cigarettes is not easy to form an uneven temperature field with a significant high and low temperature difference, which is very unfavorable to the aroma performance of heated cigarettes.

[0004] Therefore, how to improve the aroma performance of heated cigarettes is a technical problem that technicians in this field currently need to solve. Summary of the invention

[0005] The object of the present invention is to provide a heating device capable of improving the aroma performance of heated cigarettes.

[0006] To achieve the above-mentioned purpose, the present invention provides a heating device for heating non-combustible cigarettes, the heating device comprising a first heating element, an insulation tube, and a second heating element arranged in sequence along the direction of cigarette insertion, the first heating element being provided with a first resistance heating element, the second heating element being provided with a second resistance heating element connected in series with the first resistance heating element, so that the electrically connected first resistance heating element and second resistance heating element can heat the cigarette located in the inner cavities of the first heating element and the second heating element, and the resistance value of the first resistance heating element is greater than the resistance value of the second resistance heating element.

[0007] Preferably, the first heating element includes a first end facing the insulation tube and a second end away from the insulation tube, the first heating element is provided with a first heating area for installing the first resistance heating element, the first heating area is located at the local periphery of the first heating element, and there is a first gap between the first heating area and the first end to form a first blank area, and there is a second gap between the first heating area and the second end to form a second blank area.

[0008] Preferably, the second heating body includes a third end facing the insulation tube and a fourth end away from the insulation tube, and the second heating body is provided with a second heating area for installing a second resistance heating element, the second heating area is located at the local periphery of the second heating body, and there is a third interval between the second heating area and the fourth end to form a third blank area.

[0009] Preferably, a conductive component is provided between the first resistive heating element and the second resistive heating element, and the conductive component includes a first positive and negative electrode soldering pad arranged at the first end, a first conductive film arranged at the periphery of the first blank area for electrically connecting the first positive and negative electrode soldering pad and the first resistive heating element, a second positive and negative electrode soldering pad arranged at the third end and electrically connected to the second resistive heating element, and a conductive module connecting the first positive and negative electrode soldering pad and the second positive and negative electrode soldering pad.

[0010] Preferably, the conductive module includes a first positive and negative electrode connected to the first positive and negative electrode brazing pad, a second positive and negative electrode connected to the second positive and negative electrode brazing pad, and an electrode plate connected to the first positive and negative electrode and the second positive and negative electrode;

[0011] The first positive and negative electrode parts protrude from the first end to form a first slot, and the second positive and negative electrode parts protrude from the third end to form a second slot. The first slot and the second slot are used to be plugged in and matched with the two ends of the insulation tube in the axial direction.

[0012] Preferably, the outer periphery of the third blank area is provided with positive and negative wires connected to the power supply, and the third blank area is also provided with a second conductive film, and the second conductive film is used to provide electrical connection between the positive and negative wires and the second resistive heating element.

[0013] Preferably, the area of ​​the first heating zone is larger than half of the peripheral area of ​​the first heating body, and the area of ​​the second heating zone is larger than half of the peripheral area of ​​the second heating body.

[0014] Preferably, a temperature measuring point for temperature detection is provided on the first heating area.

[0015] Preferably, the resistance value of the first resistance heating element is 1.5 to 2 times the resistance value of the second resistance heating element.

[0016] Preferably, the first heating element and the second heating element are made of alumina material, and the thermal insulation tube is made of PEEK material.

[0017] Compared with the above-mentioned background technology, the heating device provided by the present invention is used for heating non-combustible cigarettes. The heating device includes a first heating element, an insulation tube, and a second heating element which are arranged in sequence along the insertion direction of the cigarette. The first heating element is provided with a first resistance heating element, and the second heating element is provided with a second resistance heating element which is connected in series with the first resistance heating element, so that the electrically connected first resistance heating element and second resistance heating element can heat the cigarette located in the inner cavity of the first heating element and the second heating element, and the resistance value of the first resistance heating element is greater than the resistance value of the second resistance heating element.

[0018] Specifically, the first resistance heating element provided by the first heating element and the second resistance heating element provided by the second heating element are connected in series, and the resistance value of the first resistance heating element is greater than the resistance value of the second resistance heating element, so that the temperature of the first heating element is higher than the temperature of the second heating element during operation, and the first heating element and the second heating element are separated by an insulating tube, so that the entire heating device forms an uneven temperature field when working, further improving the aroma performance of the heated cigarette. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a heating device provided by an embodiment of the present invention;

[0021] Figure 2 A schematic structural diagram of a heating device provided by an embodiment of the present invention from another perspective;

[0022] Figure 3 An exploded diagram of a heating device provided by an embodiment of the present invention;

[0023] Figure 4 A structural cross-sectional view of a heating device provided by an embodiment of the present invention;

[0024] Figure 5 A partial enlarged view of a heating device provided in an embodiment of the present invention;

[0025] Figure 6 A schematic structural diagram of a first heating element provided by an embodiment of the present invention;

[0026] Figure 7 An exploded diagram of a first heating element provided by an embodiment of the present invention;

[0027] Figure 8 A schematic diagram of the structure of a heat insulation pipe provided in an embodiment of the present invention;

[0028] Fig. 9 A schematic diagram of the structure of a second heating element provided by an embodiment of the present invention;

[0029] Fig.10 This is an exploded view of the second heating element provided in an embodiment of the present invention.

[0030] in:

[0031] 1-first heating element, 101-first heating area, 1021-first blank area, 1022-second blank area, 103-first positive and negative electrode soldering pads, 104-first positive and negative electrodes, 1041-first card slot, 105-first laser welding point, 2-temperature measuring point, 3-electrode plate, 4-insulation tube, 5-second heating element, 501-second positive and negative electrode soldering pads, 502-second positive and negative electrodes, 5021-second card slot, 503-second laser welding point, 504-second heating area, 505-third blank area, 6-bottom cover, 7-positive and negative electrode wires. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] In the description of the present invention, it should be understood that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0035] The object of the present invention is to provide a heating device capable of improving the aroma performance of heated cigarettes.

[0036] See also Figure 1 , Figure 2 and Figure 3 To achieve the above-mentioned purpose, the present invention provides a heating device for heating non-combustible cigarettes, the heating device comprising a first heating element 1, a heat-insulating tube 4, and a second heating element 5 which are arranged in sequence along the insertion direction of the cigarette, the first heating element 1 is provided with a first resistance heating element, the second heating element 5 is provided with a second resistance heating element which is connected in series with the first resistance heating element, so that the electrically connected first resistance heating element and second resistance heating element can heat the cigarette located in the inner cavity of the first heating element 1 and the second heating element 5, and the resistance value of the first resistance heating element is greater than the resistance value of the second resistance heating element.

[0037] Among them, the first heating element 1, the insulation tube 4, and the second heating element 5 are annular structures and are connected in sequence. They all have cavities inside for inserting cigarettes. A bottom cover 6 can be provided at the end of the second heating element 5 away from the insulation tube 4 to close the end of the second heating element 5 away from the insulation tube 4, so that the cigarette can be inserted into the cavity along the end of the first heating element 1 away from the insulation tube 4, and the bottom cover 6 is used to limit the cigarette from being detached along the end of the second heating element 5 away from the insulation tube 4, that is, the cigarette can be inserted and taken out along one end of the first heating element 1.

[0038] The first resistance heating element provided in the first heating element 1 and the second resistance heating element provided in the second heating element 5 are connected in series, and the resistance value of the first resistance heating element is greater than the resistance value of the second resistance heating element, so that the temperature of the first heating element 1 is higher than the temperature of the second heating element 5 during operation, and the first heating element 1 and the second heating element 5 are separated by the insulation tube 4, so that the entire heating device forms an uneven temperature field during operation, further improving the aroma performance of the heated cigarette.

[0039] Furthermore, the first heating element 1 includes a first end facing the insulation tube 4 and a second end away from the insulation tube 4, and the first heating element 1 is provided with a first heating area 101 for installing a first resistance heating element, the first heating area 101 is located at the local periphery of the first heating element 1, and there is a first interval between the first heating area 101 and the first end to form a first blank area 1021, and there is a second interval between the first heating area 101 and the second end to form a second blank area 1022. The second heating element 5 includes a third end facing the insulation tube 4 and a fourth end away from the insulation tube 4, and the second heating element 5 is provided with a second heating area 504 for installing a second resistance heating element, the second heating area 504 is located at the local periphery of the second heating element 5, and there is a third interval between the second heating area 504 and the fourth end to form a third blank area 505.

[0040] The first heating element 1 and the second heating element 5 are specifically made of alumina (Al2O3), and the thermal conductivity of alumina is approximately 31.77W / (m·K). The first resistive heating element on the first heating zone 101 generates heat during operation, and conducts part of the heat to the first blank area 1021 and the second blank area 1022 through the first heating element 1 made of alumina, so that the first blank area 1021 and the second blank area 1022 maintain a lower temperature than the first heating zone 101, thereby forming high and low temperature fields in different areas of the first heating element 1. Similarly, the second resistive heating element on the second heating zone 504 generates heat during operation, and conducts part of the heat to the third blank area 505 through the second heating element 5 made of alumina, so that the third blank area 505 maintains a lower temperature than the second heating zone 504, thereby forming high and low temperature fields in different areas of the second heating element 5.

[0041] In one feasible embodiment, the area of ​​the first heating zone 101 is larger than one-half of the outer peripheral area of ​​the first heating element 1, and the area of ​​the second heating zone 504 is larger than one-half of the outer peripheral area of ​​the second heating element 5. For example, the area of ​​the first heating zone 101 can be set to two-thirds of the outer peripheral area of ​​the first heating element 1, and the area of ​​the second heating zone 504 can be set to two-thirds of the outer peripheral area of ​​the second heating element 5. At the same time, the resistance value of the first resistance heating element is 1.5 times to 2 times the resistance value of the second resistance heating element. After the first resistance heating element and the second resistance heating element are connected in series, the total resistance value can be set to 0.40Ω-0.65Ω. The insulation tube 4 can be set to PEEK material. PEEK material has the advantages of high temperature resistance, corrosion resistance, and high mechanical strength, and has a thermal conductivity of 0.29W / (m·K), which is lower than the thermal conductivity of alumina. It can prevent the heat of the first heating element 1 from being transferred to the second heating element 5, which is beneficial to the formation of high and low temperature fields between the first heating element 1 and the second heating element 5.

[0042] Furthermore, the lengths of the first heating element 1 and the second heating element 5 in their own axial directions may be set differently. For example, the length of the second heating element 5 in its own axial direction may be set to 1.5 times the length of the first heating element 1 in its own axial direction, so that the area of ​​the second heating zone 504 in the second heating element 5 is larger than the area of ​​the first heating zone 101 in the first heating element 1, thereby reducing the proportion of the first heating zone 101 (high temperature zone) in the heating device, minimizing the proportion of the high temperature area, and further improving the aroma performance of the cigarette.

[0043] See also Figure 6 , Figure 7 , Fig. 9 and Fig.10 In one feasible embodiment, a conductive component is provided between the first resistive heating element and the second resistive heating element, and the conductive component includes a first positive and negative electrode soldering pad 103 arranged at the first end, a first conductive film arranged at the periphery of the first blank area 1021 for electrically connecting the first positive and negative electrode soldering pad 103 and the first resistive heating element, a second positive and negative electrode soldering pad 501 arranged at the third end and electrically connected to the second resistive heating element, and a conductive module connecting the first positive and negative electrode soldering pad 103 and the second positive and negative electrode soldering pad 501. The conductive module includes a first positive and negative electrode 104 connected to the first positive and negative electrode brazing pad 103, a second positive and negative electrode 502 connected to the second positive and negative electrode brazing pad 501, and an electrode plate 3 connected to the first positive and negative electrode 104 and the second positive and negative electrode 502, and current conduction between the first positive and negative electrode 104 and the second positive and negative electrode 502 is achieved through the electrode plate 3; the outer periphery of the third blank area 505 is provided with positive and negative wires 7 connected to the power supply, and the third blank area 505 is also provided with a second conductive film, and the second conductive film is used to provide electrical connection between the positive and negative wires 7 and the second resistive heating element.

[0044] In one feasible embodiment, the second heating resistor is arc-shaped and arranged on two opposite sides of the second heating zone 504, and the two second heating resistors are electrically isolated in the circumferential direction of the second heating zone 504. The first heating resistor is C-shaped (or the first heating resistor is arc-shaped and arranged on two opposite sides of the first heating zone 101, and connected in series as a whole through a conductive material), one end of the first heating resistor is connected in series with one end of a second heating resistor in the axial direction through a group of conductive modules, and the other end of the second heating resistor in the axial direction is connected to the positive or negative pole of the power supply through the positive and negative wires 7, and the other end of the first heating resistor is connected to the positive or negative pole of the power supply through the positive and negative wires 7. The end is connected in series with one end of another second resistance heating element in the axial direction through another group of conductive modules, and then the other end of the second resistance heating element in the axial direction is connected to the negative electrode or the positive electrode of the power supply through the positive and negative wires 7. In this way, the series connection of the first resistance heating element and the second resistance heating element is realized, wherein, when there are two second resistance heating elements and one first resistance heating element, the resistance value of the first resistance heating element is 3 times to 4 times the resistance value of a single second resistance heating element, and when the number of the second resistance heating element and the first resistance heating element are both two, the resistance value of the first resistance heating element is 1.5 times to 2 times the resistance value of the second resistance heating element.

[0045] It should be noted that the first end of the first heating element 1 is provided with a first positive and negative electrode brazing pad 103, which is brazed to the first positive and negative electrode 104 in an inert gas environment, and the third end of the second heating element 5 is provided with a second positive and negative electrode brazing pad 501, which is brazed to the second positive and negative electrode 502 in an inert gas environment. After that, the electrode plate 3 and the first positive and negative electrodes 104 are welded at the first laser welding point 105 by laser welding, and the electrode plate 3 and the second positive and negative electrodes 502 are welded at the second laser welding point 503, which are used to connect the first resistance heating element and the second resistance heating element in series, wherein the material of the first positive and negative electrodes 104, the second positive and negative electrodes 502 and the electrode plate 3 can all be selected to be nickel, and the resistance value of the electrode plate 3 is less than the resistance value of the first resistance heating element and the second resistance heating element.

[0046] See also Figure 4 , Figure 5 and Figure 8, wherein the first positive and negative electrodes 104 partially protrude from the first end to form a first slot 1041, and the second positive and negative electrodes 502 partially protrude from the third end to form a second slot 5021. Preferably, one third of the first positive and negative electrodes 104 exceed the first end of the first heating element 1 during brazing, that is, the distance between one end of the first positive and negative electrodes 104 protruding from the first end and the first end is one-half of the distance between one end of the first positive and negative electrodes 104 located at the periphery of the first heating element 1 and the first end; one third of the second positive and negative electrodes 502 exceed the second heating element 5 during brazing. The third end, that is, the distance between one end of the second positive and negative electrodes 502 protruding from the third end and the third end is half the distance between one end of the second positive and negative electrodes 502 located on the periphery of the second heating element 5 and the third end; the first card slot 1041 and the second card slot 5021 are used to plug and cooperate with the two ends of the thermal insulation tube 4 in the axial direction, and through the welding of the electrode plate 3 and the first positive and negative electrodes 104 and the second positive and negative electrodes 502, the first card slot 1041 and the second card slot 5021 are relatively fixed, thereby limiting the two ends of the thermal insulation tube 4 to limit the axial movement of the thermal insulation tube 4.

[0047] In one feasible embodiment, a temperature measuring point 2 for temperature detection is provided on the first heating zone 101. The temperature measuring point 2 can be set in the middle of the first heating zone 101 in the axial direction. By detecting the temperature of the first heating zone 101, the temperature information can be fed back in real time, and the current is controlled according to the fed-back temperature information to achieve temperature control of the first heating zone 101. The temperature of the second heating zone 504 changes accordingly according to the current size, thereby achieving temperature control of the entire heating device.

[0048] In one feasible embodiment, the first resistance heating element and the second resistance heating element can both be set as variable resistance heating elements, and the variable resistance heating element can be provided with an adjustment handle, which extends from the inside of the heating device to the outside of the heating device so as to manually and directly adjust the resistance value of the first resistance heating element and the second resistance heating element.

[0049] Since the resistance value of the first resistance heating element and the resistance value of the second resistance heating element can be adjusted within a certain range, the minimum value of the resistance value range of the first resistance heating element can be directly set to be greater than the maximum value of the resistance value range of the second resistance heating element, or the resistance value range of the first resistance heating element and the resistance value range of the second resistance heating element have a certain overlap, but the resistance value of the first resistance heating element is always greater than the resistance value of the second resistance heating element.

[0050] In one embodiment, the first resistance heating element and the second resistance heating element are both connected to a controller, and an outer wall of the first heating element 1 is provided with an adjustment button, which is connected to the controller. The adjustment button can change the resistance value of the first resistance heating element. When the resistance value of the first resistance heating element is adjusted to be large, the controller will control the resistance value of the second resistance heating element to be adjusted to be large synchronously. When the resistance value of the first resistance heating element is adjusted to be small, the controller will control the resistance value of the second resistance heating element to be adjusted to be small synchronously. In this way, it can be ensured that the resistance value of the first resistance heating element only needs to be manually adjusted to ensure that the resistance value of the first resistance heating element is always greater than the resistance value of the second resistance heating element.

[0051] A temperature difference adjustment key can also be provided next to the adjustment button. The temperature difference adjustment key is connected to the controller. By triggering the temperature difference adjustment key, the resistance difference between the resistance value of the first resistance heating element and the resistance value of the second resistance heating element can be adjusted. Of course, the resistance difference here should refer to the difference between the resistance value of the first resistance heating element and the resistance value of the second resistance heating element. With such a setting, the usage scenarios can be effectively increased to meet the usage needs of different groups of people to the maximum extent.

[0052] Of course, a mode selection key may also be provided on the outer wall of any one of the first heating element 1, the insulation tube 4 and the second heating element 5. The mode selection key is connected to the controller. By triggering the mode selection key, the heating device is put into different working modes. Different working modes correspond to different resistance values ​​of the first resistance heating element and the second resistance heating element. In this way, triggering the adjustment button and the temperature difference adjustment button can be avoided, and the desired working mode can be directly adjusted by triggering the mode selection key to meet different usage requirements.

[0053] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0055] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A heating device for heating non-burning cigarettes, characterized in that: The heating device comprises a first heating element (1), a heat-insulating tube (4), and a second heating element (5) which are arranged in sequence along the insertion direction of the cigarette, the first heating element (1) being provided with a first resistance heating element, and the second heating element (5) being provided with a second resistance heating element which is connected in series with the first resistance heating element, so that the electrically connected first resistance heating element and second resistance heating element can heat the cigarette located in the inner cavity of the first heating element (1) and the second heating element (5), and the resistance value of the first resistance heating element is greater than the resistance value of the second resistance heating element.

2. The heating device according to claim 1, characterized in that: The first heating element (1) comprises a first end facing the thermal insulation tube (4) and a second end facing away from the thermal insulation tube (4); the first heating element (1) is provided with a first heating area (101) for mounting the first resistance heating element; the first heating area (101) is located at a local periphery of the first heating element (1); and a first gap exists between the first heating area (101) and the first end to form a first blank area (1021); and a second gap exists between the first heating area (101) and the second end to form a second blank area (1022).

3. The heating device according to claim 2, characterized in that: The second heating element (5) includes a third end facing the insulation tube (4) and a fourth end facing away from the insulation tube (4), and the second heating element (5) is provided with a second heating area (504) for installing the second resistance heating element, and the second heating area (504) is located at the local periphery of the second heating element (5), and there is a third interval between the second heating area (504) and the fourth end to form a third blank area (505).

4. The heating device according to claim 3, characterized in that: A conductive component is provided between the first resistive heating element and the second resistive heating element, and the conductive component includes a first positive and negative electrode soldering pad (103) arranged at the first end, a first conductive film arranged at the periphery of the first blank area (1021) for electrically connecting the first positive and negative electrode soldering pad (103) and the first resistive heating element, a second positive and negative electrode soldering pad (501) arranged at the third end and electrically connected to the second resistive heating element, and a conductive module connecting the first positive and negative electrode soldering pad (103) and the second positive and negative electrode soldering pad (501).

5. The heating device according to claim 4, characterized in that: The conductive module comprises a first positive and negative electrode (104) connected to the first positive and negative electrode soldering pad (103), a second positive and negative electrode (502) connected to the second positive and negative electrode soldering pad (501), and an electrode plate (3) connected to the first positive and negative electrode (104) and the second positive and negative electrode (502); The first positive and negative electrodes (104) partially protrude from the first end to form a first slot (1041), and the second positive and negative electrodes (502) partially protrude from the third end to form a second slot (5021), and the first slot (1041) and the second slot (5021) are used to be plugged into and matched with the two ends of the thermal insulation tube (4) in the axial direction.

6. The heating device according to any one of claims 3 to 5, characterized in that: The outer periphery of the third blank area (505) is provided with positive and negative wires (7) connected to a power source, and the third blank area (505) is also provided with a second conductive film, and the second conductive film is used to provide electrical connection between the positive and negative wires (7) and the second resistive heating element.

7. The heating device according to any one of claims 3 to 5, characterized in that: The area of ​​the first heating zone (101) is greater than one half of the outer peripheral area of ​​the first heating element (1), and the area of ​​the second heating zone (504) is greater than one half of the outer peripheral area of ​​the second heating element (5).

8. The heating device according to any one of claims 3 to 5, characterized in that: A temperature measuring point (2) for temperature detection is provided on the first heating area (101).

9. The heating device according to any one of claims 3 to 5, characterized in that: The resistance value of the first resistance heating element is 1.5 times to 2 times the resistance value of the second resistance heating element.

10. The heating device according to any one of claims 3 to 5, characterized in that: The first heating element (1) and the second heating element (5) are specifically made of alumina material, and the thermal insulation tube (4) is specifically made of PEEK material.

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