An internally heated tobacco appliance and heating method for effectively improving heating efficiency

Abstract

The present invention provides an internally heated tobacco appliance and a heating method that can effectively improve the heating efficiency, which relates to the technical field of cigarette heating. It includes a smoking device body, and a heating cavity for inserting a cigarette is arranged on the smoking device body. A capacitor structure is arranged in the heating cavity. The capacitor structure includes a first electrode plate and a second electrode plate. One end of the first electrode plate is provided with a first shaft hole and a first rotating shaft for inserting into the first shaft hole. One end of the second electrode plate is provided with a second shaft hole and a second rotating shaft for inserting into the second shaft hole. Both the first rotating shaft and the second rotating shaft are connected to a driving motor. The structure of the present invention is simple. By adopting the internally heated method, there is no need to use a metal heating element, which is convenient for production and post-use treatment. Moreover, the heating efficiency is effectively improved by changing the capacitor structure. At the same time, the cigarette can be locked to prevent it from falling off, and the use experience is better.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette heating,

[0002] In particular, the present invention relates to an internally heated tobacco appliance and a heating method that can effectively improve the heating efficiency. Background Art

[0003] With the increasing development of cigarette production technology, the types and appearances of cigarettes are more diversified, and cigarettes with unique shapes are more likely to be favored by people. Therefore, it is necessary to heat the cigarette sticks. Due to the high heating efficiency of electromagnetic heating technology, many tobacco companies have begun to apply electromagnetic heating technology to the field of low-temperature cigarette heating.

[0004] After the new electromagnetic induction tobacco was launched on the market, due to its characteristic of separating the heating element from the heating appliance, it has caused a great impact on traditional resistance heating new tobacco. For example, the Chinese patent utility model patent CN207978951U discloses an electromagnetic heating smoking appliance, which includes a housing. A power supply, a circuit board, a heating container and a coil are arranged in the housing, and a switch button is arranged outside the housing; the circuit board is respectively connected to the power supply, the switch button and the coil, and the coil is wound around the outer surface of the heating container. The heating container is made of a material with high magnetic permeability; the power supply is used to provide direct current; the circuit board is used to convert the direct current provided by the power supply into alternating current after the switch button is triggered; the coil is used to generate an alternating magnetic field when alternating current passes through; the heating container is used to accommodate a cigarette stick and generate eddy current in itself to heat itself when the coil generates an alternating magnetic field, so as to heat the cigarette stick. Thus, the above heating container can not only accommodate the cigarette stick but also heat itself electromagnetically to directly heat and bake the cigarette stick, making the electromagnetic heating smoking appliance have the advantages of high heating efficiency, low power consumption and rapid heating.

[0005] However, the above heating device has great defects: the heating element used in electromagnetic heating must be metal, and adding metal materials to the cigarette stick will cause many troubles in production, storage and disposal after smoking.

[0006] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable and efficient internally heated tobacco appliance that can effectively improve the heating efficiency. Summary of the Invention

[0007] The purpose of the present invention is to provide an internally heated tobacco appliance that can effectively improve the heating efficiency, which has a simple structure, adopts an internal heating method, does not require the use of a metal heating element, is convenient for production and disposal after use, effectively improves the heating efficiency by changing the capacitor structure, and can lock the cigarette stick to prevent it from falling off, and has a better user experience.

[0008] The reason for putting forward this purpose is that the internal heating method is used more frequently in the field of cigarette heating, and the heating element used in internal heating does not need to use metal materials. Therefore, it has more potential than electromagnetic heating in terms of production process resource utilization and recycling.

[0009] How to improve the heating efficiency in internal heating has always been a key issue. Usually, the solutions are mainly divided into three directions. First is the material aspect - by finding materials with higher heat generation efficiency. Second is the circuit aspect - increasing voltage and frequency. Finally is the appliance structure aspect - changing the capacitor structure. However, the material aspect is limited by safety and industrial efficiency, and the circuit aspect is limited by the size of the appliance. The method of improving the heating efficiency by changing the capacitor structure is more feasible.

[0010] To achieve the above object, the present invention is realized by adopting the following technical solutions:

[0011] An internal heating type tobacco appliance that effectively improves heating efficiency, including a smoking appliance body. A heating cavity for conveniently inserting a cigarette for heating is provided on the smoking appliance body. A capacitor structure is provided in the heating cavity. The capacitor structure includes a first electrode plate and a second electrode plate. One end of the first electrode plate is provided with a first shaft hole and a first rotating shaft for inserting into the first shaft hole. One end of the second electrode plate is provided with a second shaft hole and a second rotating shaft for inserting into the second shaft hole. Both the first rotating shaft and the second rotating shaft are connected to a driving motor. So that after the cigarette is inserted into the heating cavity, under the drive of the driving motor, the first electrode plate and the second electrode plate respectively rotate around the first rotating shaft and the second rotating shaft, thereby clamping the cigarette between the first electrode plate and the second electrode plate.

[0012] As a preference of the present invention, the distance between the first rotating shaft and the second rotating shaft is not less than the outer diameter of the cigarette.

[0013] As a preference of the present invention, a limiting cover plate is provided at the entrance of the heating cavity. A limiting hole is provided on the limiting cover plate, and the inner diameter of the limiting hole is not less than the outer diameter of the cigarette.

[0014] As a preference of the present invention, before the cigarette is inserted into the heating cavity, the projection of the first rotating shaft on the plane where the second electrode plate is located is on the side of the second rotating shaft away from the second electrode plate; when the cigarette is inserted into the heating cavity and the cigarette is clamped between the first electrode plate and the second electrode plate, the projection of the first rotating shaft on the plane where the second electrode plate is located is at the end of the second electrode plate away from the second rotating shaft.

[0015] As a preference of the present invention, before and after the rotation of the first electrode plate and the second electrode plate, the first electrode plate and the second electrode plate are both kept parallel.

[0016] Preferably, a power supply and a power controller are provided inside the smoking appliance body, and a terminal for electrically connecting the first rotating shaft and the second rotating shaft to the two poles of the power supply respectively is provided at the bottom of the heating chamber.

[0017] Preferably, the lengths of the first electrode plate and the second electrode plate are not greater than the length of the smoking section of the cigarette.

[0018] The present invention also provides a heating method for an internally heated tobacco appliance that effectively improves the heating efficiency, including the following steps:

[0019] S1: Insert the cigarette into the heating chamber and reach between the first electrode plate and the second electrode plate;

[0020] S2: Turn on the drive motor for driving the first rotating shaft and the second rotating shaft to rotate, so that the first electrode plate and the second electrode plate rotate around the first rotating shaft and the second rotating shaft respectively until the first rotating shaft and the second rotating shaft clamp the cigarette;

[0021] S3: Perform capacitive heating between the first electrode plate and the second electrode plate to heat the cigarette.

[0022] Preferably, in step S2, before the first electrode plate and the second electrode plate rotate, the distance between the first electrode plate and the second electrode plate is equal to the distance between the first rotating shaft and the second rotating shaft, and both are greater than the outer diameter of the cigarette; and after the first electrode plate and the second electrode plate rotate, the distance between the first electrode plate and the second electrode plate is less than the outer diameter of the cigarette.

[0023] Preferably, before performing step S1, a limit cover plate is provided at the opening of the heating chamber, and a limit hole for facilitating the insertion of the cigarette is provided on the limit cover plate.

[0024] The beneficial effects of an internally heated tobacco appliance and a heating method for effectively improving the heating efficiency according to the present invention are as follows: The structure is simple, the internal heating method is adopted, no metal heating element is required, it is convenient for production and post - use treatment, and the heating efficiency is effectively improved by changing the capacitor structure. At the same time, the cigarette can be locked to prevent falling off, and the use experience is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of an internally heated tobacco appliance for effectively improving the heating efficiency according to the present invention;

[0026] Figure 2 is a schematic diagram of the structure of an embodiment of an internally heated tobacco appliance for effectively improving the heating efficiency according to the present invention from a top view perspective without clamping the cigarette (without a limit cover plate);

[0027] Figure 3 Schematic diagram of the structure of an internally heated tobacco device that effectively improves heating efficiency of the present invention from a top-down perspective when clamping a cigarette (without a limit cover plate);

[0028] Figure 4 Flow chart of the heating method of an internally heated tobacco device that effectively improves heating efficiency of the present invention;

[0029] In the figure: 1. Smoking device body, 11. Heating chamber, 12. Limit cover plate, 13. Power supply, 14. Power supply controller, 2. Cigarette, 3. Capacitor structure, 31. First electrode plate, 311. First rotating shaft, 32. Second electrode plate, 321. Second rotating shaft. Detailed implementation manners

[0030] The following are specific embodiments of the present invention, which further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0031] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements and steps of the modules and steps described in these embodiments do not limit the scope of the present invention.

[0032] Meanwhile, it should be understood that for the convenience of description, the processes in the accompanying drawings do not occur separately, but multiple steps cross each other.

[0033] The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes any limitation to the present invention and its application or use.

[0034] Technologies, methods, and systems known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and systems should be regarded as part of the authorization specification.

[0035] Embodiment 1: As Figures 1 to 3As shown, it is only one embodiment of the present invention, an internal heating type tobacco appliance that effectively improves the heating efficiency, including a smoking device body 1. A heating cavity 11 is provided on the smoking device body 1 for conveniently inserting a cigarette 2 for heating. A capacitor structure 3 is arranged in the heating cavity 11. The capacitor structure 3 includes a first electrode plate 31 and a second electrode plate 32. One end of the first electrode plate 31 is provided with a first shaft hole and a first rotating shaft 311 for inserting into the first shaft hole. One end of the second electrode plate 32 is provided with a second shaft hole and a second rotating shaft 321 for inserting into the second shaft hole. Both the first rotating shaft 311 and the second rotating shaft 321 are connected to a driving motor. After the cigarette 2 is inserted into the heating cavity 11, under the drive of the driving motor, the first electrode plate 31 and the second electrode plate 32 rotate around the first rotating shaft 311 and the second rotating shaft 321 respectively, so as to clamp the cigarette 2 between the first electrode plate 31 and the second electrode plate 32.

[0036] In the present invention, the capacitor structure 3 arranged in the heating cavity 11 of the smoking device body 1 capacitively heats the cigarette 2 between two capacitor electrode plates (i.e., the first electrode plate 31 and the second electrode plate 32) by capacitive heating, and the first electrode plate 31 and the second electrode plate 32 can rotate around the first rotating shaft 311 and the second rotating shaft 321 respectively under the drive of the driving motor.

[0037] The first rotating shaft 311 and the second rotating shaft 321 are arranged in parallel, and the first rotating shaft 311 is arranged parallel to the extending direction of the first electrode plate 31; the second rotating shaft 321 is arranged parallel to the extending direction of the second electrode plate 32, that is, the first rotating shaft 311 and the second rotating shaft 321 respectively penetrate the entire length of the first electrode plate 31 and the second electrode plate 32.

[0038] Moreover, only the smoking section of the cigarette 2 is inserted into the heating cavity 11. After that, when an electric current is applied between the first electrode plate 31 and the second electrode plate 32 to generate capacitance, the heating element in the smoking section will be capacitively heated, thereby heating the cigarette 2.

[0039] Here, the heating element can be arranged at the bottom of the heating cavity 11, and when the smoking section of the cigarette 2 is inserted into the heating cavity 11, the heating element can also be inserted into the smoking section; the heating element can also be directly preset in the smoking section; suitable materials for the heating element include water, alcohols, metal oxides, and various inorganic salts, such as barium dioxide and ferrite for example. Or the heating element can be selected as water or alcohol, and it can be heated to a temperature of 250 degrees Celsius or higher, so as to heat the non-combustible tobacco.

[0040] Before the first electrode plate 31 and the second electrode plate 32 rotate, the first electrode plate 31 and the second electrode plate 32 are respectively located on both sides of the line connecting the first rotating shaft 311 and the second rotating shaft 321, and the extending directions of the first electrode plate 31 and the second electrode plate 32 are both perpendicular to the line connecting the first rotating shaft 311 and the second rotating shaft 321, as Figure 2 shown;

[0041] Here, the distance between the first rotating shaft 311 and the second rotating shaft 321 is not less than the outer diameter of the cigarette rod 2. Before the first electrode plate 31 and the second electrode plate 32 rotate, the first electrode plate 31 and the second electrode plate 32 are arranged in parallel, and the distance between them is equal to the distance between the first rotating shaft 311 and the second rotating shaft 321, and both are greater than the outer diameter of the cigarette rod 2.

[0042] After the cigarette rod 2 is inserted into the heating cavity 11, the first electrode plate 31 and the second electrode plate 32 rotate, and the angles between them and the line connecting the first rotating shaft 311 and the second rotating shaft 321 gradually become smaller. Until the first electrode plate 31 and the second electrode plate 32 become two sides of a regular rectangle, at this time, the cigarette rod 2 is clamped between the first electrode plate 31 and the second electrode plate 32. At this time, the projection of the first rotating shaft 311 on the plane where the second electrode plate 32 is located is located at one end of the second electrode plate 32 away from the second rotating shaft 321, as Figure 3 shown, so that the cigarette rod 2 can be clamped and capacitively heated.

[0043] Here, when the cigarette rod 2 is clamped between the first electrode plate 31 and the second electrode plate 32, the distance between the first electrode plate 31 and the second electrode plate 32 is less than the outer diameter of the cigarette rod 2, so that the cigarette rod 2 is clamped and flattened to form an elliptical cylindrical structure. At the same time, the distance between the first electrode plate 31 and the second electrode plate 32 is small enough. On the premise that the voltage between the first electrode plate 31 and the second electrode plate 32 remains unchanged, the electric field strength between the first electrode plate 31 and the second electrode plate 32 will increase, resulting in a faster change in the temperature of the heating element, thereby effectively improving the heating efficiency.

[0044] It should be noted that before and after the first electrode plate 31 and the second electrode plate 32 rotate, the first electrode plate 31 and the second electrode plate 32 are both arranged in parallel. That is to say, the first rotating shaft 311 and the second rotating shaft 321 can be driven by a driving motor, or the driving motor for driving the first rotating shaft 311 and the driving motor for driving the second rotating shaft 321 work synchronously.

[0045] For the convenience of explanation: The first electrode plate 31 and the second electrode plate 32 have the same specifications, with a width of b each. The distance between the first rotating shaft 311 and the second rotating shaft 321 is c. In this case, before the first electrode plate 31 and the second electrode plate 32 rotate to clamp the cigarette 2, the distance between the first electrode plate 31 and the second electrode plate 32 is c; when the first electrode plate 31 and the second electrode plate 32 rotate to clamp the cigarette 2, according to the Pythagorean theorem, the distance between the first electrode plate 31 and the second electrode plate 32 is sqrt(c^2 - b^2).

[0046] Then the outer diameter of the cigarette 2 can be between c and sqrt(c^2 - b^2). Or rather, in order to minimize the distance between sqrt(c^2 - b^2), c can be slightly larger than the cigarette 2, and the length of b can be appropriately increased.

[0047] In actual situations, it is unlikely that the first rotating shaft 311 and the second rotating shaft 321 are arranged at the extreme ends of the first electrode plate 31 and the second electrode plate 32. That is to say, the first rotating shaft 311 and the second rotating shaft 321 should be at a distance of a from the ends of the first electrode plate 31 and the second electrode plate 32 respectively.

[0048] Then when the first electrode plate 31 and the second electrode plate 32 rotate to clamp the cigarette 2, according to the Pythagorean theorem, the distance between the first electrode plate 31 and the second electrode plate 32 is sqrt(c^2 - (b - 2a)^2).

[0049] That is, the heating efficiency of using the above structure is c^2 / (c^2 - (b - 2a)^2) times that of directly inserting the cigarette into the electrode plates with a spacing of c for heating.

[0050] Of course, before the first electrode plate 31 and the second electrode plate 32 rotate to clamp the cigarette 23, the distance between the end of the first electrode plate 31 far from the first rotating shaft 311 and the end of the second electrode plate 32 far from the second rotating shaft 321 is sqrt(c^2 + (2b - a)^2); then for the convenience of installing the first electrode plate 31 and the second electrode plate 32, the inner diameter of the heating cavity 11 is not less than sqrt(c^2 + (2b - a)^2).

[0051] The structure of an internally heated tobacco appliance of the present invention that effectively improves the heating efficiency is simple. It adopts the internal heating method, does not require the use of a metal heating element, is convenient for production and post - use processing, effectively improves the heating efficiency by changing the capacitor structure, and can lock the cigarette to prevent it from falling off, providing a better user experience.

[0052] Example 2, still as Figures 1 to 3As shown, this is only one embodiment of the present invention. Based on the first embodiment, in an internally heated tobacco appliance of the present invention that effectively improves the heating efficiency, a limiting cover plate 12 is provided at the entrance of the heating chamber 11. The limiting cover plate 12 is provided with a limiting hole, and the inner diameter of the limiting hole is not less than the outer diameter of the cigarette rod 2. That is, when the distance between the first electrode plate 31 and the second electrode plate 32 is c, and the inner diameter of the heating chamber 11 is not less than sqrt(c^2+(2b - a)^2), it is possible that the cigarette rod 2 cannot be inserted well between the first electrode plate 31 and the second electrode plate 32 when inserted. By providing the limiting cover plate 12, the cigarette rod 2 can just be inserted between the first electrode plate 31 and the second electrode plate 32 through the limiting hole.

[0053] In addition, a power supply 13 and a power supply controller 14 are provided inside the smoking appliance body 1. Wiring terminals for electrically connecting the first rotating shaft 311 and the second rotating shaft 321 to the two poles of the power supply 13 respectively are provided at the bottom of the heating chamber 11. The power supply 13 is for supplying power to form a capacitor between the first electrode plate 31 and the second electrode plate 32, and the power supply controller 14 is for controlling the turning on or off of the power supply.

[0054] Of course, the driving source of the driving motor can be electric drive or manual drive; when it is electric drive, the driving motor can be electrically connected to the power supply 13, and the power supply 13 supplies power to the driving motor; when it is manual drive, buttons or sliders can be used to manually drive the driving motor to work.

[0055] Finally, the lengths of the first electrode plate 31 and the second electrode plate 32 are both not greater than the length of the smoking section of the cigarette rod 2. Since the smoking section of the cigarette rod 2 is relatively easy to deform, and the hardness of the hollow section connected to the smoking section is relatively higher, the lengths of the first electrode plate 31 and the second electrode plate 32 (along the depth direction of the heating chamber 11) should be less than the length of the smoking section. For example, if the length of the smoking section is 12 mm, the lengths of the first electrode plate 31 and the second electrode plate 32 can be set to 10 mm.

[0056] Embodiment Three, as Figure 4 shown, the present invention also provides a heating method for an internally heated tobacco appliance that effectively improves the heating efficiency in any of the above embodiments, including the following steps:

[0057] S1: Insert the cigarette rod into the heating chamber and reach between the first electrode plate and the second electrode plate;

[0058] S2: Turn on the driving motor for driving the first rotating shaft and the second rotating shaft to rotate, so that the first electrode plate and the second electrode plate rotate around the first rotating shaft and the second rotating shaft respectively until the first rotating shaft and the second rotating shaft clamp the cigarette rod;

[0059] S3: Capacitive heating is carried out between the first electrode plate and the second electrode plate to heat the cigarette rod.

[0060] Moreover, in the execution of step S2, before the first electrode plate and the second electrode plate rotate, the distance between the first electrode plate and the second electrode plate is equal to the distance between the first rotating shaft and the second rotating shaft, and both are greater than the outer diameter of the cigarette; and after the first electrode plate and the second electrode plate rotate, the distance between the first electrode plate and the second electrode plate is less than the outer diameter of the cigarette.

[0061] Furthermore, before the execution of step S1, a limit cover plate is arranged at the opening of the heating cavity, and a limit hole for facilitating the insertion of the cigarette is arranged on the limit cover plate.

[0062] The internal heating type tobacco appliance and heating method of the present invention for effectively improving the heating efficiency have a simple structure. By adopting the internal heating method, there is no need to use a metal heating body, which is convenient for production and post - use treatment. Moreover, the heating efficiency is effectively improved by changing the capacitor structure. At the same time, the cigarette can be locked to prevent it from falling off, providing a better user experience.

[0063] The present invention is not limited to the specific embodiments described above, and various modifications and changes can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made based on the technical essence of the present invention to the above - mentioned embodiments shall be included in the protection scope of the present invention.

Claims

1. An internally heated tobacco appliance that effectively improves the heating efficiency, characterized in that: It includes a smoking device body (1), on which there is a heating cavity (11) for facilitating the insertion of a cigarette (2) for heating. A capacitor structure (3) is arranged in the heating cavity (11). The capacitor structure (3) includes a first electrode plate (31) and a second electrode plate (32). One end of the first electrode plate (31) is provided with a first shaft hole and a first rotating shaft (311) for inserting into the first shaft hole. One end of the second electrode plate (32) is provided with a second shaft hole and a second rotating shaft (321) for inserting into the second shaft hole; the distance between the first rotating shaft (311) and the second rotating shaft (321) is not less than the outer diameter of the cigarette (2); both the first rotating shaft (311) and the second rotating shaft (321) are connected to a driving motor, so that after the cigarette (2) is inserted into the heating cavity (11), driven by the driving motor, the first electrode plate (31) and the second electrode plate (32) rotate around the first rotating shaft (311) and the second rotating shaft (321) respectively, and the angles between the first electrode plate and the second electrode plate and the connecting lines between the first rotating shaft and the second rotating shaft gradually become smaller until the cigarette (2) is clamped between the first electrode plate (31) and the second electrode plate (32).

2. An internally heated tobacco appliance that effectively improves the heating efficiency according to claim 1, characterized in that: A limit cover plate (12) is arranged at the entrance of the heating cavity (11). A limit hole is arranged on the limit cover plate (12), and the inner diameter of the limit hole is not less than the outer diameter of the cigarette (2).

3. An internally heated tobacco appliance for effectively improving heating efficiency according to claim 1, characterized in that: When the cigarette (2) is inserted into the heating cavity (11) and the cigarette (2) is clamped between the first electrode plate (31) and the second electrode plate (32), the distance between the first electrode plate (31) and the second electrode plate (32) is not greater than the outer diameter of the cigarette (2).

4. An internally heated tobacco appliance for effectively improving heating efficiency according to claim 3, characterized in that: Before and after the rotation of the first electrode plate (31) and the second electrode plate (32), the first electrode plate (31) and the second electrode plate (32) are both kept parallel.

5. An internally heated tobacco appliance for effectively improving heating efficiency according to claim 1, characterized in that: A power source (13) and a power source controller (14) are arranged in the smoking device body (1). Connection terminals for electrically connecting the first rotating shaft (311) and the second rotating shaft (321) to the two poles of the power source (13) respectively are arranged at the bottom of the heating cavity (11).

6. An internally heated tobacco appliance that effectively improves the heating efficiency according to claim 1, characterized in that: The lengths of both the first electrode plate (31) and the second electrode plate (32) are not greater than the length of the smoking section of the cigarette (2).

7. A heating method for an internally heated tobacco appliance that effectively improves the heating efficiency according to any one of claims 1 to 6, characterized in that, It includes the following steps: S1: Insert the cigarette into the heating cavity and reach between the first electrode plate and the second electrode plate; S2: Turn on the driving motor for driving the rotation of the first rotating shaft and the second rotating shaft, so that the first electrode plate and the second electrode plate rotate around the first rotating shaft and the second rotating shaft respectively, and the angles between the first electrode plate and the second electrode plate and the connecting lines between the first rotating shaft and the second rotating shaft gradually become smaller; until the first electrode plate and the second electrode plate clamp the cigarette; S3: Conduct capacitive heating between the first electrode plate and the second electrode plate to heat the cigarette.

8. The heating method of an internally heated tobacco device for effectively improving heating efficiency according to claim 7, characterized in that: Before performing step S2 and before the first electrode plate and the second electrode plate rotate, the distance between the first electrode plate and the second electrode plate is equal to the distance between the first rotating shaft and the second rotating shaft, and both are greater than the outer diameter of the cigarette; and after the first electrode plate and the second electrode plate rotate, the distance between the first electrode plate and the second electrode plate is less than the outer diameter of the cigarette.

9. The heating method of an internally heated tobacco appliance for effectively improving the heating efficiency according to claim 8, characterized in that: Before performing step S1, a limiting cover plate is arranged at the opening of the heating chamber, and a limiting hole for facilitating the insertion of the cigarette is arranged on the limiting cover plate.

Images