Double heat pipe heating device

Abstract

This utility model discloses a dual-heating-tube heating device, relating to the field of smoking appliance heating technology. The dual-heating-tube heating device features a first heating tube and a second heating tube arranged side-by-side within a housing, allowing external airflow to flow sequentially through both heating tubes. This extends the residence time of the airflow within the heating tubes, enabling it to be heated over a longer period. This increases the temperature of the airflow exiting the heating tubes, allowing the heating chamber to reach the preset temperature in a shorter time, thereby improving heating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of smoking appliance heating technology, and in particular to a dual-heating-tube heating device. Background Technology

[0002] Currently, the heating structure inside smoking devices typically uses a heating element to heat the airflow when heating the tobacco leaves in the heating chamber. The heated airflow is then delivered to the heating chamber to heat the tobacco leaves, achieving a dry-burning effect. Currently, the heating structure inside smoking devices usually only has one heating pipe. The airflow enters the heating chamber after passing through the heating pipe to heat the tobacco leaves. Because the airflow stays in the heating pipe for a short time, the temperature inside the heating chamber is difficult to reach the preset temperature quickly, which is not conducive to improving the heating efficiency of the heating device. Utility Model Content

[0003] The main purpose of this invention is to propose a dual-heating-tube heating device, which aims to improve the problem that the heating efficiency of the current internal heating structure of smoking devices is low, resulting in the inability to quickly reach the preset temperature in the heating chamber.

[0004] To achieve the above objectives, this utility model proposes a dual-heating-tube heating device, comprising:

[0005] case;

[0006] A first heating channel is disposed inside the housing and, in the height direction of the housing from top to bottom, has a first end and a second end that are disposed opposite to each other.

[0007] A second heating channel is disposed within the housing, and along the height direction of the housing from top to bottom, the second heating channel has a third end and a fourth end disposed opposite to each other; and

[0008] A heating chamber for holding tobacco leaves is located inside the housing and above the first heating channel and the second heating channel; the first end is connected to the outside, the second end is connected to the fourth end, and the third end is connected to the heating chamber.

[0009] In one embodiment, the dual-heating-tube heating device further includes:

[0010] A first heating element is installed inside the housing, and the inner cavity of the first heating element forms the first heating channel; and

[0011] The second heating element is installed inside the housing, and the inner cavity of the second heating element forms the second heating channel;

[0012] The first heating element and the second heating element are arranged at intervals in the radial direction of the housing.

[0013] In one embodiment, the dual heating tube heating device further includes a mounting base, and the end of the mounting base facing the heating chamber has two first connecting tubes, which are respectively inserted into the second end and the fourth end.

[0014] The two first connecting pipes are connected at the ends opposite to the heating chamber.

[0015] In one embodiment, a first conductive cavity is formed at the end of the mounting base away from the heating chamber, and the ends of both first connecting pipes away from the heating chamber are connected to the first conductive cavity.

[0016] In one embodiment, the end of the mounting base away from the heating chamber has an opening communicating with the outside and the first conductive cavity;

[0017] The dual heating element heating device also includes a bottom cover, which is detachably installed at the opening for opening or closing the opening.

[0018] In one embodiment, the dual heating element heating device further includes an auxiliary tube, which is disposed inside the housing, and the first heating element and the second heating element are both disposed inside the auxiliary tube;

[0019] The outer periphery of the first heating tube and the second heating tube are spaced apart from the inner wall of the auxiliary tube, so that the spaced interval forms an auxiliary air passage for gas flow.

[0020] The end of the auxiliary air passage closest to the heating chamber is connected to the first end, and the end of the auxiliary air passage furthest from the heating chamber is connected to the outside.

[0021] In one embodiment, the dual heating tube heating device further includes a heat insulation tube disposed outside the auxiliary tube, and the outer periphery of the auxiliary tube is spaced apart from the inner wall of the heat insulation tube so that the gap between the inner wall of the heat insulation tube and the outer periphery of the auxiliary tube forms a transition space.

[0022] The auxiliary tube has a first air hole at the end away from the heating chamber that is connected to the auxiliary air passage and the transition space;

[0023] The end of the transition space furthest from the heating chamber is connected to the outside.

[0024] In one embodiment, the ends of the auxiliary pipe and the heat insulation pipe away from the heating chamber are both snapped onto the mounting base, and the mounting base located between the heat insulation pipe and the auxiliary pipe is provided with a second vent that communicates with the outside world and the transition space.

[0025] In one embodiment, the heating chamber includes:

[0026] A first cylindrical body is installed inside the housing. The bottom of the first cylindrical body has a second connecting pipe that inserts into the third end, allowing the second heating channel to communicate with the first cylindrical body.

[0027] The second cylinder is housed within the first cylinder, and a vent hole is provided through the bottom of the second cylinder.

[0028] In one embodiment, the dual heating tube heating device further includes a suction nozzle, which is movably disposed above the second cylinder.

[0029] This utility model of a dual-heating-tube heating device extends the residence time of the airflow within the heating tubes by arranging a first heating tube and a second heating tube side by side inside the housing, allowing external airflow to flow through the first and second heating tubes sequentially. This enables the airflow to be heated over a longer period of time, increasing the temperature of the airflow when it exits the heating tubes. Consequently, the heating chamber can reach the preset temperature in a shorter time, thereby improving heating efficiency. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of the dual-heating-tube heating device of this utility model;

[0032] Figure 2 This utility model relates to a dual-heating-tube heating device. Figure 1 Schematic diagram of the mid-section structure;

[0033] Figure 3 This is a schematic diagram showing the nozzle and bottom cover of the dual heating tube heating device of this utility model when they are open.

[0034] Figure 4 This utility model relates to a dual-heating-tube heating device. Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0035] Figure 5 This utility model relates to a dual-heating-tube heating device. Figure 3 Enlarged schematic diagram of the structure at point B;

[0036] Figure 6 This is a schematic diagram showing the connection relationship between the first heating tube, the second heating tube, the heating chamber, and the mounting base of the dual heating tube heating device of this utility model.

[0037] Figure 7 This is a schematic diagram of the mounting base structure for the dual heating tube heating device of this utility model;

[0038] Figure 8 This is a schematic diagram of the first cylindrical body structure of the dual-heating-tube heating device of this utility model;

[0039] Figure 9 This is a schematic diagram of the second cylinder structure of the dual heating tube heating device of this utility model.

[0040] Explanation of icon numbers:

[0041] 1. Housing; 11. Third vent; 12. First support tube; 121. Perforation; 13. First sealing ring; 14. Second conductive cavity; 15. Second support tube; 16. First magnet; 161. Abutting part; 17. Second magnet; 18. Second sealing ring;

[0042] 2. Heating chamber; 21. First cylinder; 211. Second connecting pipe; 212. Limiting pipe; 2121. Notch; 22. Second cylinder; 221. Vent hole; 222. Extension;

[0043] 3. First heating element; 31. First heating channel; 311. First end; 312. Second end;

[0044] 4. Second heating element; 41. Second heating channel; 411. Third end; 412. Fourth end;

[0045] 5. Bottom cover; 51. Collection plate;

[0046] 6. Auxiliary tube; 61. Auxiliary airway; 62. First air vent;

[0047] 7. Transition space;

[0048] 8. Mounting base; 81. First connecting pipe; 82. First conductive cavity; 821. Opening; 822. Second vent;

[0049] 9. Suction nozzle; 91. Baffle plate; 92. Suction channel; 93. Filter screen;

[0050] 10. Insulation pipe.

[0051] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0053] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0054] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0055] Currently, the heating structure inside smoking devices typically uses a heating element to heat the airflow when heating the tobacco leaves in the heating chamber. The heated airflow is then delivered to the heating chamber to heat the tobacco leaves, achieving a dry-burning effect. Currently, the heating structure inside smoking devices usually only has one heating pipe. The airflow enters the heating chamber after passing through the heating pipe to heat the tobacco leaves. Because the airflow stays in the heating pipe for a short time, the temperature inside the heating chamber is difficult to reach the preset temperature quickly, which is not conducive to improving the heating efficiency of the heating device.

[0056] Based on this, refer to Figure 1 , Figure 2 , Figure 3 As shown, this application provides a dual-heating-tube heating device, including a housing 1, a first heating channel 31, a second heating channel 41, and a heating chamber 2; wherein, the first heating channel 31 and the second heating channel 41 are both disposed within the housing 1, and are arranged side by side in the radial direction of the housing 1; as shown Figure 2As shown, in the height direction of the shell 1, the first heating channel 31 has a first end 311 near the heating chamber 2 and a second end 312 away from the heating chamber 2, and the second heating channel 41 has a third end 411 near the heating chamber 2 and a fourth end 412 away from the heating chamber 2. The heating chamber 2 is used to hold tobacco leaves and is located inside the shell 1. The heating chamber 2 is located above the first heating channel 31 and the second heating channel 41, and the heating chamber 2 and the third end 411 of the second heating channel 41 are connected. The second end 312 of the first heating channel 31 and the fourth end 412 of the second heating channel 41 are connected. The first end 311 of the first heating channel 31 is connected to the outside, so that the outside airflow can enter the first heating channel 31 through the first end 311, then move down in the first heating channel 31 to the second end 312 and then enter the second heating channel 41 through the fourth end 412, and finally enter the heating chamber 2 through the third end 411 on the second heating channel 41, so as to heat the tobacco leaves located in the heating chamber 2 and dry-burn them.

[0057] In this embodiment, as the external airflow flows through the first heating channel 31 and the second heating channel 41 in sequence, both the first heating channel 31 and the second heating channel 41 can heat the airflow, thereby extending the heating time of the external airflow (ensuring that the airflow can be fully heated), so that the temperature inside the heating chamber 2 can quickly reach the preset temperature range, thereby improving the heating efficiency.

[0058] It is understood that the upper end of the heating chamber 2 is open, thereby allowing the smoke generated when the tobacco leaves are dry-burned in the heating chamber 2 to move to the outside. For example, a matching suction part can be provided above the housing 1, and the suction part is connected to the upper end of the heating chamber 2, thereby allowing the user to suck the smoke discharged from the heating chamber 2 through the suction part. It is understood that when the user sucks air through the suction part, the gas in the external environment enters the first heating channel 31 through the first end 311, and then flows sequentially through the second end 312, the fourth end 412 and the third end 411 before entering the heating chamber 2, so that the smoke generated when the tobacco leaves are dry-burned in the heating chamber 2 is sucked into the body along with the heated gas.

[0059] Reference Figure 2 , Figure 3 , Figure 6As shown, in one embodiment of this application, the dual-heating-tube heating device further includes a first heating tube 3 and a second heating tube 4; wherein, the first heating tube 3 is installed inside the housing 1, and the inner cavity of the first heating tube 3 forms the aforementioned first heating channel 31; the second heating tube 4 is installed inside the housing 1, and the inner cavity of the second heating tube 4 forms the aforementioned second heating channel 41; in the height direction of the housing 1, the first heating channel 31 is disposed through the first heating tube 3, and the second heating channel 41 is disposed through the second heating tube 4; and in the radial direction of the housing 1, the first heating tube 3 and the second heating tube 4 are arranged side by side at intervals.

[0060] It is understood that the first heating element 3 and the second heating element 4 are components that can generate heat when energized, and the first heating element 3 and the second heating element 4 have the same structure. For example, they both include an insulating structural component, which is tubular in shape, and the inner cavity of the insulating structural component forms the heating channel mentioned above. A heating wire is provided on the inner and / or outer peripheral side of the insulating structural component, and the heating wire is electrically connected to a power supply component. The power supply component can be a battery (such as a lithium-ion battery), and the power supply component is installed inside the housing 1.

[0061] In this embodiment, the insulating structure can be a ceramic structure with insulating and high-temperature resistant properties, and the heating wire should be evenly distributed on the peripheral surface of the insulating structure to achieve uniform heating of the airflow flowing through the heating channel.

[0062] It is understandable that conductive components electrically connected to the heating wire can be provided at the upper (or lower) ends of the first heating tube 3 and the second heating tube 4. Each heating tube is equipped with two conductive components to realize the introduction and output of current, thereby forming a complete closed circuit. The conductive components are conductive structural components with a certain hardness, such as copper or aluminum. This allows the conductive components to be connected to the power supply components and supply power to the heating wire, thereby achieving the heating effect.

[0063] Reference Figure 1 , Figure 2 , Figure 3 , Figure 7As shown in one embodiment of this application, the dual heating tube heating device further includes a mounting base 8. The end of the mounting base 8 facing the heating chamber 2 has two first connecting tubes 81. The inner diameter of the first connecting tube 81 is consistent with the outer diameter of the first heating tube 3 and the second heating tube 4. Thus, when the second end 312 of the first heating tube 3 and the fourth end 412 of the second heating tube 4 are inserted into the corresponding first connecting tubes 81, the inner wall of the first connecting tube 81 can be tightly fitted and contacted with the outer wall of the first heating tube 3 and the second heating tube 4, ensuring the sealing of the connection between the two. At the same time, in order to support the first heating tube 3 (second heating tube 4) inserted into the first connecting tube 81, a protrusion extending axially toward the first connecting tube 81 is provided at the end of the first connecting tube 81 away from the heating chamber 2. The inserted end of the first heating tube 3 and the second heating tube 4 abuts against the protrusion, thereby achieving the supporting effect of the first heating tube 3 and the second heating tube 4.

[0064] In this embodiment, as Figure 2 , Figure 3 As shown, the two first connecting pipes 81 are connected at the ends away from the heating chamber 2, thereby connecting the second end 312 of the first heating tube 3 and the fourth end 412 of the second heating tube 4 through the two first connecting pipes 81. This allows external airflow to enter from the second end 312 of the first heating tube 3 through the two first connecting pipes 81 to the fourth end 412 of the second heating tube 4, thereby realizing the flow of airflow between the first heating channel 31 and the second heating channel 41.

[0065] Reference Figure 2 , Figure 3 , Figure 6 As shown in one embodiment of this application, a first conductive cavity 82 is formed at the end of the mounting base 8 away from the heating chamber 2, and the ends of the two first connecting pipes 81 away from the heating chamber 2 are connected to the first conductive cavity 82, thereby enabling the ends of the two first connecting pipes 81 away from the heating chamber 2 to be connected through the first conductive cavity 82; when the airflow enters the first connecting pipe 81 that is inserted and matched with the first heating tube 3, it will first enter the first conductive cavity 82, and then enter the first connecting pipe 81 that is inserted and matched with the second heating tube 4 through the first conductive cavity 82, and finally enter the second heating tube 4, and enter the heating chamber 2 through the second heating tube 4 to heat the tobacco leaves, thereby realizing the dry burning of the tobacco leaves in the heating chamber 2.

[0066] Reference Figure 2 , Figure 3 , Figure 6 As shown, in one embodiment of this application, the end of the mounting base 8 away from the heating chamber 2 has an opening 821 that communicates with the outside and the first conductive cavity 82; the dual heating tube heating device also includes a bottom cover 5, which is detachably mounted on the opening 821 for opening or closing the opening 821.

[0067] It is understandable that when tobacco leaves are dry-burned in the heating chamber 2, ash will be produced. Inevitably, some ash will fall from the heating chamber 2 through the second heating tube 4 and eventually fall into the first conductive cavity 82. In this embodiment, a bottom cover 5 is provided and is detachably placed at the opening 821. This allows the bottom cover 5 to be removed from the opening 821 when the user finishes smoking, leaving the opening 821 in an open state. This allows the first conductive cavity 82 to communicate with the outside through the opening 821, and the user can clean the ash that has fallen into the first conductive cavity 82 through the open opening 821.

[0068] In this embodiment, as Figure 2 , Figure 3 As shown, a specific structure of a bottom cover 5 is provided. The bottom cover 5 is rotatably mounted on the bottom of the housing 1, and the bottom cover 5 has a sealing position covering the opening 821 (e.g., Figure 2 (as shown) and the opening position away from opening 821 (as shown) Figure 3 As shown), the bottom cover 5 has a collection plate 51 on the side facing the housing 1 that corresponds to the position of the opening 821 (the collection plate 51 and the bottom cover 5 are connected by riveting). When the bottom cover 5 is in the closed position, the collection plate 51 is located directly below the opening 821. In the height direction of the housing 1, the opening 821 is located inside the collection plate 51. Thus, when the tobacco leaves in the heating chamber 2 are dry-burned and produce ash that falls down through the second heating tube 4, it all falls onto the collection plate 51 for the purpose of collecting the ash. It can be understood that after the user finishes smoking, the bottom cover 5 can be moved from the closed position to the open position to clean the ash that has fallen onto the collection plate 51.

[0069] In this embodiment, a specific structure is provided in which the bottom cover 5 is movably disposed at the opening 821, such as... Figure 3 As shown, a second magnet 17 (arranged in a ring shape and snapped between the mounting base 8 and the bottom wall of the housing 1) is installed inside the housing 1. A magnetic conductor (such as iron) is provided at the corresponding position of the bottom cover 5 and the second magnet 17, or the collecting plate 51 itself is a magnetic conductor. This allows the bottom cover 5 to be positioned in the sealed position by the magnetic attraction between the second magnet 17 and the magnetic conductor when it is in the sealed position, thereby sealing the opening 821. When it is necessary to open the bottom cover 5, the user forces the bottom cover 5 to rotate relative to the housing 1 and overcome the magnetic attraction between the second magnet 17 and the magnetic conductor, thereby opening the bottom cover 5.

[0070] Reference Figure 2 , Figure 3 , Figure 6As shown, in one embodiment of this application, the dual-heating-tube heating device further includes an auxiliary tube 6, which is installed inside the housing 1, and the first heating tube 3 and the second heating tube 4 are both located inside the auxiliary tube 6. The outer periphery of the first heating tube 3 and the second heating tube 4 are spaced apart from the inner wall of the auxiliary tube 6, so that the space between the outer periphery of the first heating tube 3 and the second heating tube 4 and the inner wall of the auxiliary tube 6 forms an auxiliary air passage 61 for gas flow. The end of the auxiliary air passage 61 near the heating chamber 2 is connected to the first end 311, and the end of the auxiliary air passage 61 away from the heating chamber 2 is connected to the outside.

[0071] In this embodiment, by setting an auxiliary pipe 6, the external airflow will first flow in the auxiliary airway 61 when it enters the first heating channel 31 and the second heating channel 41. This allows the heat radiated outward from the first heating channel 31 and the second heating channel 41 to be absorbed and utilized (improving the heat utilization efficiency). As a result, the external airflow is preheated in the auxiliary airway 61 to a certain degree. When the airflow in the auxiliary airway 61 enters the first heating channel 31 through the first end 311, it already has an initial temperature. Therefore, the heating power of the first heating channel 31 and the second heating channel 41 (that is, appropriately reducing the current flowing through the heating wire) can be appropriately reduced, thereby reducing the power consumption of the device.

[0072] Reference Figure 2 , Figure 3 As shown, in one embodiment of this application, the dual-heating-tube heating device further includes a heat insulation tube 10. The heat insulation tube 10 is disposed inside the housing 1 and fixedly mounted on the mounting base 8. The inner side of the heat insulation tube 10 is spaced apart from the outer periphery of the auxiliary tube 6, so that the gap between the inner wall of the heat insulation tube 10 and the outer periphery of the auxiliary tube 6 forms a transition space 7; Figure 2 , Figure 6 As shown, the end of the auxiliary tube 6 away from the heating chamber 2 has a first air hole 62 that connects to the auxiliary air passage 61 and the transition space 7. The end of the transition space 7 away from the heating chamber 2 is connected to the outside. This allows the gas in the external environment to enter the transition space 7 through the end of the transition space 7 away from the heating chamber 2 when the user is inhaling. Then, the gas enters the auxiliary air passage 61 through the first air hole 62 on the auxiliary tube 6. The airflow entering the auxiliary air passage 61 is initially heated by the heat radiated outward by the first heating tube 3 and the second heating tube 4. The airflow enters the first heating tube 3 and the second heating tube 4 from the first end 311 of the first heating tube 3, and finally enters the heating chamber 2 to heat the tobacco leaves.

[0073] Understandably, multiple first vents 62 can be provided, thereby improving the efficiency of external gas entering the transition space 7 and entering the auxiliary airway 61.

[0074] In this embodiment, the heat insulation tube 10 is used to confine the heat generated by the first heating tube 3 and the second heating tube 4 within the heat insulation tube 10, minimizing heat loss to the outside, thereby improving heat utilization and reducing power consumption; at the same time, the heat insulation tube 10 also prevents the heat generated by the first heating tube 3 and the second heating tube 4 from spreading to other areas inside the shell 1, avoiding high temperatures in other areas inside the shell 1; it is understood that the heat insulation tube 10 can be a vacuum heat insulation tube or some aerogel material, etc.

[0075] Reference Figure 2 , Figure 3 , Figure 6 As shown, in one embodiment of this application, the ends of the auxiliary pipe 6 and the heat insulation pipe 10 away from the heating chamber 2 are both snapped onto the mounting base 8. The mounting base 8 located between the heat insulation pipe 10 and the auxiliary pipe 6 is provided with a second air hole 822 that connects to the outside world and the transition space 7. This allows outside gas to enter the transition space 7 through the second air hole 822 and then enter the auxiliary air passage 61 through the first air hole 62 on the auxiliary pipe 6.

[0076] In this embodiment, as Figure 7 As shown, on the side of the mounting base 8 facing the heating chamber 2, there are two coaxially arranged first annular bodies that engage with the auxiliary tube 6 and second annular bodies that engage with the heat insulation tube 10. The inner diameter of the first annular body is matched with the outer diameter of the auxiliary tube 6, so that when the auxiliary tube 6 is inserted into the first annular body, the outer circumference of the auxiliary tube 6 fits tightly against the inner wall of the first annular body, thus positioning the auxiliary tube 6. Similarly, the inner diameter of the second annular body is matched with the outer diameter of the heat insulation tube 10, so that when the heat insulation tube 10 is inserted into the second annular body, the outer circumference of the heat insulation tube 10 fits tightly against the inner wall of the second annular body, thus positioning the heat insulation tube 10.

[0077] In this embodiment, as Figure 3 , Figure 7 As shown, the second vent 822 is provided on the mounting base 8 between the first annular body and the second annular body, and multiple second vents 822 can be provided. Multiple second vents 822 are arranged at intervals around the periphery of the annular body, thereby improving the efficiency of external gas entering the transition space 7.

[0078] It is understood that the mounting base 8 is fixedly installed inside the housing 1. In order to allow external gas to enter the transition space 7 through the second air hole 822, a third air hole 11 communicating with the outside needs to be opened at the bottom of the housing 1 and at the position corresponding to the second air hole 822. In the height direction of the housing 1, the third air hole 11 is positioned corresponding to the second air hole 822, and there are also multiple third air holes 11. This allows external gas to enter the transition space 7 sequentially through the third air hole 11 and the second air hole 822 under the action of suction force when the user inhales. Then, the gas entering the transition space 7 enters the auxiliary air passage 61 through the first air hole 62 on the auxiliary pipe 6.

[0079] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, in one embodiment of this application, the heating chamber 2 includes a first cylinder 21 and a second cylinder 22; wherein, as... Figure 8 As shown, the bottom of the first cylinder 21 has a second connecting pipe 211 that is inserted into the third end 411, and the outer diameter of the second connecting pipe 211 is the same as the inner diameter of the second heating tube 4. This ensures that when the second connecting pipe 211 is inserted into the third end 411, the outer periphery of the second connecting pipe 211 is in close contact with the inner periphery of the second heating tube 4. The second cylinder 22 is housed inside the first cylinder 21 and the tobacco leaves are contained inside the second cylinder 22. A vent hole 22 is provided through the bottom of the second cylinder 22. 1 (The upper part of the second cylinder 22 is connected to the outside). It can be understood that there can be multiple vent holes 221, and the multiple vent holes 221 are all arranged on the bottom wall of the second cylinder 22. This is used to allow airflow to enter the second cylinder 22 through the first connecting pipe 81 and the vent holes 221, thereby heating the tobacco leaves inside the second cylinder 22. The radial dimension of the vent holes 221 does not need to be set too large, so as to avoid the tobacco leaves falling down from the vent holes 221 while satisfying the gas flow.

[0080] In this embodiment, as Figure 8 , Figure 3 As shown, a limiting tube 212 is provided at the bottom of the first cylinder 21 and at a position corresponding to the first heating tube 3. The outer diameter of the limiting tube 212 is the same as the inner diameter of the first heating tube 3. When the limiting tube 212 is inserted into the first heating tube 3, it is used to cooperate with the first connecting tube 81 provided on the mounting base 8 to constrain and limit the first heating tube 3 (to improve the installation stability of the first heating tube 3 in the housing 1); Figure 8 As shown, in order to allow the first end 311 of the first heating tube 3 to communicate with the auxiliary airway 61, a notch 2121 is provided on the peripheral wall of the limiting tube 212 extending upward from the first heating tube 3 (as shown). Figure 4As shown), this allows the first end 311 of the first heating tube 3 to be connected to the auxiliary airway 61 via the above-mentioned notch 2121; it is understood that there can be multiple notches 2121, and the multiple notches 2121 are arranged circumferentially around the limiting tube 212.

[0081] In this embodiment, a structure is provided for fixing the first cylindrical body 21 inside the housing 1, such as... Figure 2 , Figure 3 As shown, a first support tube 12 is fixedly installed inside the housing 1, and a first cylinder 21 is housed within the first support tube 12 and fixedly connected to the first support tube 12. It can be understood that the first support tube 12 can be made of heat-insulating material to achieve heat insulation, thereby reducing heat loss from the first cylinder 21 and the second cylinder 22 to the outside. The bottom of the first support tube 12 is provided with a through hole 121 for the first heating tube 3 and the second heating tube 4 to pass through (for insertion and engagement with the limiting tube 212 and the second connecting tube 211, respectively). Figure 4 As shown, the inner diameter of the perforation 121 is set to satisfy the following condition: when the first heating tube 3 and the second heating tube 4 pass through the perforation 121, the inner diameter of the perforation 121 is spaced apart from the outer periphery of the first heating tube 3 and the second heating tube 4, thereby forming a flow channel between the inner wall of the perforation 121 and the first heating tube 3 and the second heating tube 4 for connecting the auxiliary air passage 61 and the above-mentioned notch 2121, so that the gas in the auxiliary air passage 61 enters the limiting tube 212 through the above-mentioned flow channel and the notch 2121, and finally enters the first heating tube 3.

[0082] In this embodiment, as Figure 4 As shown, a second conductive cavity 14 is formed between the first cylinder 21 and the first support cylinder 12. Gas in the auxiliary air passage 61 first enters the second conductive cavity 14 through the perforation 121, and then enters the limiting tube 212 through the notch 2121, finally entering the first heating tube 3. To ensure the sealing performance of the second conductive cavity 14, such as... Figure 2 , Figure 3 As shown, a second sealing ring 18 is sandwiched between the first cylinder 21 and the first support cylinder 12. The second sealing ring 18 is annular and is in close contact with the inner circumference of the first support cylinder 12 and the outer circumference of the first cylinder 21, thereby filling and sealing the space between the first cylinder 21 and the first support cylinder 12 and ensuring that gas does not leak out from other locations in the second conductive cavity 14. It is understood that the second sealing ring 18 can be made of silicone material.

[0083] In this embodiment, a structure is provided to improve the sealing performance of the transition space 7 and the auxiliary air passage 61, such as... Figure 2 , Figure 3As shown, a second support cylinder 15 is also fixedly installed inside the housing 1, and the second support cylinder 15 is inserted into the heat insulation tube 10 from top to bottom. The outer diameter of the end of the second support cylinder 15 inserted into the heat insulation tube 10 matches the inner diameter of the heat insulation tube 10, thereby further improving the positioning effect of the heat insulation tube 10. A first sealing ring 13 (also arranged in a ring shape) is clamped between the second support cylinder 15 and the first support cylinder 12. The upper part of the first sealing ring 13 is clamped between the first support cylinder 12 and the second support cylinder 15, and the lower part of the first sealing ring 13 is clamped between the first support cylinder 12 and the second support cylinder 15. Between the two support tubes 15 and the auxiliary tube 6, the transition space 7 formed between the heat insulation tube 10 and the auxiliary tube 6, and the auxiliary air passage 61 formed between the auxiliary tube 6 and the first heating tube 3 and the second heating tube 4, all have good sealing performance. This ensures that the gas entering the transition space 7 can only enter the auxiliary air passage 61 through the first air hole 62 provided on the auxiliary tube 6, and the gas entering the auxiliary air passage 61 can only enter the first heating tube 3 through the second conductive cavity 14 connected to it, and will not leak to the outside from other positions in the transition space 7 and the auxiliary air passage 61.

[0084] Reference Figure 2 , Figure 3 , Figure 6 As shown, in one embodiment of this application, the dual heating tube heating device further includes a suction nozzle 9. A suction channel 92 is provided through the suction nozzle 9 in the height direction of the suction nozzle 9. The suction nozzle 9 is movably covered above the second cylinder 22. It can be understood that the suction nozzle 9 is rotatably mounted on the top of the housing 1 via a rotating shaft, and the suction nozzle 9 has a suction position covering the second cylinder 22 and an open position that can be moved away from the second cylinder 22. When the user sucks, the suction nozzle 9 is in the suction position, so that the suction channel 92 is connected to the second cylinder 22, thereby realizing the suction process.

[0085] In this embodiment, as Figure 6 As shown, a filter 93 is provided in the suction channel 92 to prevent the user from drawing out the tobacco leaves in the second cylinder 22 during the suction process, thereby improving the user experience.

[0086] In this embodiment, a structure for positioning the suction nozzle 9 is provided, such as... Figure 2 , Figure 3As shown, a first magnet 16 is fixedly installed inside the housing 1. The first magnet 16 is arranged in a ring shape, and the bottom of the first magnet 16 abuts against the upper surface of the second sealing ring 18. The suction nozzle 9 has a magnetic guide that can generate magnetic attraction with the first magnet 16 on the side facing the second cylinder 22. When the suction nozzle 9 is in the suction position, the magnetic attraction between the magnetic guide and the first magnet 16 can reliably position the suction nozzle 9 and make it stably in the suction position so that the user can use it. When the user needs to clean the ash in the second cylinder 22 after suction, the user can forcefully drive the suction nozzle 9 to move away from the second cylinder 22 (overcoming the magnetic attraction between the first magnet 16 and the magnetic guide), thereby cleaning the ash in the second cylinder 22.

[0087] In this embodiment, in order to achieve a better cleaning effect on the second cylinder 22, the second cylinder 22 can be detachably disposed inside the first cylinder 21; such as Figure 9 As shown, an outwardly protruding extension 222 is provided on the upper circumferential side of the second cylinder 22, such as... Figure 3 , Figure 5 As shown, the first magnet 16 is provided with an abutment portion 161 for supporting the extension 222, so that when the second cylinder 22 is housed within the first cylinder 21, the extension 222 can abut against the abutment portion 161 provided on the first magnet 16, thereby supporting the second cylinder 22; as Figure 4 As shown, the bottom of the second cylinder 22 and the bottom of the first cylinder 21 are spaced a certain distance apart, so that the gas entering through the second connecting pipe 211 will first enter the space between the bottom of the first cylinder 21 and the bottom of the second cylinder 22, and then enter the second cylinder 22 through the space through a plurality of vent holes 221 provided at the bottom of the second cylinder 22, thereby improving the efficiency of gas entering the second cylinder 22.

[0088] Understandably, in order to further improve the positioning effect of the second cylinder 22, when the suction nozzle 9 is in the suction position, such as Figure 2 As shown, a stop plate 91 (riveted to the suction nozzle 9) can be installed on the side of the suction nozzle 9 facing the second cylinder 22. The stop plate 91 is annular in shape and has a certain number of air holes (such as...) Figure 6(As shown) For gas flow, the baffle plate 91 is a funnel-shaped structure recessed towards the second cylinder 22. This allows the baffle plate 91 to press against the extension 222 at the upper end of the second cylinder 22 when the nozzle 9 is in the suction position. Through the cooperation between the baffle plate 91 and the abutment part 161 on the first magnet 16, the second cylinder 22 is reliably positioned, ensuring that the second cylinder 22 will not shake inside the first cylinder 21 during suction. When the user finishes suction, the nozzle 9 is opened, and the second cylinder 22 can be removed from the first cylinder 21 for thorough cleaning, thereby improving the cleaning effect and convenience.

[0089] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A dual-heating-tube heating device, characterized in that, include: case; A first heating channel is disposed inside the housing and, in the height direction of the housing from top to bottom, has a first end and a second end that are disposed opposite to each other. A second heating channel is disposed inside the housing and, in the height direction of the housing from top to bottom, has a third end and a fourth end that are disposed opposite to each other. as well as A heating chamber for holding tobacco leaves is located inside the housing and above the first heating channel and the second heating channel; the first end is connected to the outside, the second end is connected to the fourth end, and the third end is connected to the heating chamber.

2. The dual-heating-tube heating device as described in claim 1, characterized in that, The dual-heating-tube heating device also includes: A first heating element is installed inside the housing, and the inner cavity of the first heating element forms the first heating channel; and The second heating element is installed inside the housing, and the inner cavity of the second heating element forms the second heating channel; The first heating element and the second heating element are arranged at intervals in the radial direction of the housing.

3. The dual-heating-tube heating device as described in claim 2, characterized in that, The dual heating tube heating device also includes a mounting base, and the end of the mounting base facing the heating chamber has two first connecting tubes, which are respectively inserted into the second end and the fourth end. The two first connecting pipes are connected at the ends opposite to the heating chamber.

4. The dual-heating-tube heating device as described in claim 3, characterized in that, The mounting base has a first conductive cavity at the end opposite to the heating chamber, and the ends of both first connecting pipes opposite to the heating chamber are connected to the first conductive cavity.

5. The dual-heating-tube heating device as described in claim 4, characterized in that, The end of the mounting base away from the heating chamber has an opening that connects to the outside and the first conductive cavity; The dual heating element heating device also includes a bottom cover, which is detachably installed over the opening for opening or closing the opening.

6. The dual-heating-tube heating device as described in claim 3, characterized in that, The dual heating element heating device also includes an auxiliary tube, which is located inside the housing, and both the first heating element and the second heating element are located inside the auxiliary tube. The outer periphery of the first heating tube and the second heating tube are spaced apart from the inner wall of the auxiliary tube, so that the spaced interval forms an auxiliary air passage for gas flow. The end of the auxiliary air passage closest to the heating chamber is connected to the first end, and the end of the auxiliary air passage furthest from the heating chamber is connected to the outside.

7. The dual-heating-tube heating device as described in claim 6, characterized in that, The dual heating tube heating device also includes a heat insulation tube disposed outside the auxiliary tube, and the outer periphery of the auxiliary tube is spaced apart from the inner wall of the heat insulation tube so that the gap between the inner wall of the heat insulation tube and the outer periphery of the auxiliary tube forms a transition space. The auxiliary tube has a first air hole at the end away from the heating chamber that is connected to the auxiliary air passage and the transition space; The end of the transition space furthest from the heating chamber is connected to the outside.

8. The dual-heating-tube heating device as described in claim 7, characterized in that, The auxiliary pipe and the heat insulation pipe are both snapped onto the mounting base at the ends away from the heating chamber. The mounting base located between the heat insulation pipe and the auxiliary pipe is provided with a second vent that connects to the outside world and the transition space.

9. The dual-heating-tube heating device according to any one of claims 1-8, characterized in that, The heating chamber includes: A first cylindrical body is installed inside the housing. The bottom of the first cylindrical body has a second connecting pipe that inserts into the third end, allowing the second heating channel to communicate with the first cylindrical body. The second cylinder is housed within the first cylinder, and a vent hole is provided through the bottom of the second cylinder.

10. The dual-heating-tube heating device as described in claim 9, characterized in that, The dual heating tube heating device also includes a suction nozzle, which is movably covered above the second cylinder.

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