Heating device

Abstract

This utility model discloses a heating device, relating to the field of tobacco heating technology. The heating device comprises a first flow channel, a second flow channel, and a heating channel, which are sequentially connected along the airflow path. This allows external airflow to pass through the first flow channel, the second flow channel, and the heating channel in sequence, achieving heating before being delivered into the heating chamber, thereby heating the tobacco leaves inside. During its movement through the first and second flow channels, the external airflow fully absorbs and utilizes the heat radiated outwards by the heating channel, thus improving the utilization rate of the heat generated within the heating channel. Since the external airflow already has a certain initial temperature when entering the heating channel from the second flow channel, the heating power of the heating channel can be appropriately reduced, helping to decrease the power consumption of the heating device.

Description

Technical Field

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

[0002] Currently, the heating structure inside smoking devices typically uses a heating element to heat the airflow when heating tobacco leaves (shredded tobacco). The heated airflow then flows through the tobacco leaves and heats them to achieve a dry-burning effect. However, when the heating structure inside the smoking device is working, the external airflow directly enters the inner cavity of the heating element and is heated before being directly transported to the location of the tobacco leaves. This results in the heat on the outer wall of the heating element not being fully utilized, leading to low heat utilization and hindering the reduction of power consumption of the heating device. Utility Model Content

[0003] The main purpose of this invention is to propose a heating device that aims to improve the problems of low heat utilization and high power consumption in current internal heating structures of smoking devices.

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

[0005] case;

[0006] The first flow channel is located inside the housing;

[0007] The second flow channel is located inside the first flow channel;

[0008] A heating channel is located inside the second flow channel; and

[0009] A heating chamber for holding tobacco leaves is installed inside the housing and located above the heating channel, with the upper end of the heating channel communicating with the heating chamber.

[0010] The first flow channel and the second flow channel are connected at their ends near the heating chamber, and the second flow channel and the heating channel are connected at their ends away from the heating chamber. The end of the first flow channel away from the heating chamber is connected to the outside.

[0011] In one embodiment, the heating device further includes:

[0012] The first cylindrical body is installed inside the housing; and

[0013] The second cylinder is disposed inside the first cylinder, and the second cylinder is spaced apart from the first cylinder to form the first flow channel between the first cylinder and the second cylinder;

[0014] A heating element is disposed inside the second cylinder, and the heating element is spaced apart from the second cylinder to form a second flow channel between the second cylinder and the heating element; the inner cavity of the heating element forms the heating channel;

[0015] In the height direction of the heating device, the first cylinder, the second cylinder, and both ends of the heating tube are all connected through it.

[0016] In one embodiment, the bottom of the housing has a mounting base, and the mounting base has a first limiting ring, a second limiting ring, and a third limiting ring on the side facing the heating chamber;

[0017] The first cylindrical body is inserted into the first limiting ring, the second cylindrical body is inserted into the second limiting ring, and the heating element is inserted into the third limiting ring;

[0018] The mounting base located between the first limiting ring and the second limiting ring has a first hole communicating with the outside and the first flow channel; the mounting base located between the second limiting ring and the third limiting ring has a second hole communicating with the second flow channel; the mounting base located inside the third limiting ring has a third hole communicating with the heating channel, and the second hole and the third hole are in communication.

[0019] In one embodiment, a first exchange cavity is formed on the side of the mounting base away from the heating chamber, and the second hole and the third hole are connected through the first exchange cavity.

[0020] In one embodiment, the end of the mounting base facing away from the heating chamber has an opening that connects to the outside and the first exchange chamber;

[0021] The heating device also includes a bottom cover, which is movably disposed over the opening for opening or closing the opening.

[0022] In one embodiment, the heating device further includes a top cover disposed within the housing, and the top cover is disposed at the upper end of the first cylinder;

[0023] The top cover is inserted into the inner side of the first cylinder, and the heating chamber is embedded in the top cover. The top cover and the heating chamber enclose the space above the first cylinder and the second cylinder to form a second exchange cavity.

[0024] The first flow channel and the second flow channel are connected to the heating chamber via the second exchange chamber.

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

[0026] A first cup body is embedded within the top cover, and the bottom of the first cup body has a connecting tube that inserts into the heating element; and

[0027] The second cup is used to hold tobacco leaves. The second cup is housed within the first cup, and the bottom of the second cup is spaced apart from the bottom of the first cup. A fourth hole is provided through the bottom of the second cup. Hot air flows through the heating channel, the connecting pipe, and the fourth hole into the second cup to heat the tobacco leaves inside the second cup.

[0028] In one embodiment, the heating device further includes a suction nozzle, which is movably disposed above the second cup body;

[0029] The nozzle has a suction channel that connects to the outside and the second cup body.

[0030] In one embodiment, the suction channel has a filter screen.

[0031] In one embodiment, the second cup body is detachably disposed within the first cup body.

[0032] This utility model heating device is configured with a first flow channel, a second flow channel, and a heating channel, which are sequentially connected along the airflow path. This allows external airflow to pass through the first flow channel, the second flow channel, and the heating channel in sequence, be heated, and then be transported into the heating chamber, thereby heating the tobacco leaves inside. During the movement of the external airflow through the first and second flow channels, the external airflow fully absorbs and utilizes the heat radiated outward by the heating channel, thus improving the utilization rate of the heat generated in the heating channel. Since the external airflow already has a certain initial temperature when it enters the heating channel from the second flow channel, the heating power of the heating channel can be appropriately reduced, which helps to reduce the power consumption of the heating device. Attached Figure Description

[0033] 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.

[0034] Figure 1 This is a schematic diagram of the overall structure of the heating device of this utility model;

[0035] Figure 2 This utility model heating device Figure 1 Schematic diagram of the middle structure;

[0036] Figure 3 This utility model heating device Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0037] Figure 4 This is a schematic diagram showing the positional relationship between the first cup and the second cup of the heating device of this utility model;

[0038] Figure 5 This is a schematic diagram of the structure of the first magnetic conductive element in the heating device of this utility model;

[0039] Figure 6 This is a schematic diagram showing the positional relationship between the first cylinder, the second cylinder, and the heating element of the heating device of this utility model;

[0040] Figure 7 This is a schematic diagram of the second cup body structure of the heating device of this utility model;

[0041] Figure 8 This is a schematic diagram of the mounting base structure for the heating device of this utility model;

[0042] Figure 9 This is a schematic diagram of the second magnetic conductive element of the heating device of this utility model.

[0043] Explanation of icon numbers:

[0044] 1. Housing; 11. Mounting base; 111. Clamping base; 1111. First limiting ring; 1112. Second limiting ring; 1113. Third limiting ring; 1114. First hole; 1115. Second hole; 1116. Third hole; 1117. Second magnetic conductor; 1118. Third sealing ring; 112. Bearing base; 1121. Connecting hole;

[0045] 2. Heating chamber; 21. First cup body; 211. Connecting pipe; 22. Second cup body; 221. Fourth hole; 222. Extension;

[0046] 3. First cylinder; 31. First flow channel; 4. Second cylinder; 41. Second flow channel;

[0047] 5. Heating element; 51. Heating channel;

[0048] 6. First exchange chamber; 61. Opening;

[0049] 7. Bottom cover; 71. Mounting cavity; 72. Receiving plate; 73. Second magnetic component;

[0050] 8. Top cover; 81. First cover body; 82. First sealing ring; 83. Support cylinder; 84. Second sealing ring; 85. First magnetic conductive element; 851. Stop surface; 852. Snap-fit ​​ring;

[0051] 9. Second exchange chamber;

[0052] 10. Suction nozzle; 101. Suction channel; 102. Filter screen; 103. Pressure plate; 104. First magnetic component.

[0053] 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

[0054] 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.

[0055] 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.

[0056] 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.

[0057] Currently, the heating structure inside smoking devices typically uses a heating element to heat the airflow when heating tobacco leaves (shredded tobacco). The heated airflow then flows through the tobacco leaves and heats them to achieve a dry-burning effect. However, when the heating structure inside the smoking device is working, the external airflow directly enters the inner cavity of the heating element and is heated before being directly transported to the location of the tobacco leaves. This results in the heat on the outer wall of the heating element not being fully utilized, leading to low heat utilization and hindering the reduction of power consumption of the heating device.

[0058] Based on this, refer to Figure 1 , Figure 2 , Figure 6 As shown, this application embodiment provides a heating device, including a housing 1, a first flow channel 31, a second flow channel 41, and a heating chamber 2; wherein, the first flow channel 31, the second flow channel 41, and the heating chamber 2 are all disposed inside the housing 1, as shown. Figure 2 , Figure 6 As shown, the heating channel 51 is located inside the second flow channel 41, and the second flow channel 41 is located inside the first flow channel 31. That is, the first flow channel 31, the second flow channel 41, and the heating channel 51 are nested together. The heating chamber 2 is used to hold tobacco leaves and is installed inside the housing 1. The heating chamber 2 is located above the heating channel 51, and the end of the heating channel 51 facing the heating chamber 2 is connected to the heating chamber 2, thereby realizing the delivery of heated gas into the heating chamber 2, thereby realizing the heating of the tobacco leaves stored in the heating chamber 2.

[0059] In this embodiment, as Figure 6 As shown, the first flow channel 31 and the second flow channel 41 are connected at their ends near the heating chamber 2, and the second flow channel 41 and the heating channel 51 are connected at their ends away from the heating chamber 2. The end of the first flow channel 31 away from the heating chamber 2 is connected to the outside, so that the outside airflow enters the first flow channel 31 through the end of the first flow channel 31 away from the heating chamber 2, and moves upward along the first flow channel 31, so that it enters the second flow channel 41 from the end of the first flow channel 31 near the heating chamber 2, and then moves in the second flow channel 41 in the direction away from the heating chamber 2. The end of channel 41 away from the heating chamber 2 then enters the heating channel 51. During the above process, when the airflow flows through the first channel 31 and the second channel 41, it can absorb and utilize the heat radiated outward by the heating channel 51 and perform preliminary heating on the airflow. When the airflow enters the heating channel 51 from the second channel 41, it is further heated by the heating channel 51, thereby heating the airflow to the preset temperature and sending it into the heating chamber 2 to heat the tobacco leaves so that the tobacco leaves can be dry-burned in the heating chamber 2.

[0060] In this embodiment, the external airflow absorbs and utilizes the heat radiated outward from the heating channel 51 as it flows through the first channel 31 and the second channel 41, thereby improving the heat utilization rate; and the airflow entering the heating channel 51 has been preheated, so the heating power of the heating channel 51 can be appropriately reduced, thereby helping to reduce the power consumption of the heating device.

[0061] In this embodiment, the heating chamber 2 is open at the end away from the heating channel 51, that is, it is connected to the outside. This allows gas heated to a predetermined temperature to enter the heating chamber 2 and the smoke generated by the dry burning of tobacco leaves in the heating chamber 2 to be discharged outward through the upper end of the heating chamber 2 for the user to inhale. It can be understood that a corresponding suction part for the user to inhale can be provided at the open end of the heating chamber 2, thereby realizing the inhalation process.

[0062] Reference Figure 2 , Figure 6 As shown, in one embodiment of this application, the heating device further includes a first cylinder 3, a second cylinder 4, and a heating tube 5; wherein, the first cylinder 3, the second cylinder 4, and the heating tube 5 are all fixedly installed inside the housing 1, and the heating tube 5 is spaced apart inside the second cylinder 4, and the second cylinder 4 is spaced apart inside the first cylinder 3, thereby forming the first flow channel 31 between the first cylinder 3 and the second cylinder 4, forming the second flow channel 41 between the second cylinder 4 and the heating tube 5, and forming the heating channel 51 in the inner cavity of the heating tube 5; both ends of the first cylinder 3, the second cylinder 4, and the heating tube 5 are through-connected in the height direction of the heating device, that is, both ends of the first cylinder 3, the second cylinder 4, and the heating tube 5 are open to the outside.

[0063] In this embodiment, the first cylinder 3, the second cylinder 4, and the heating element 5 are all fixedly installed inside the housing 1, and the above-mentioned components are spaced apart. It can be understood that the first flow channel 31, the second flow channel 41, and the heating channel 51 are all arranged in a ring shape. The first cylinder 3, the second cylinder 4, and the heating element 5 can be arranged coaxially or non-coaxially within the housing 1. When arranged coaxially within the housing 1, the distance between the first flow channel 31, the second flow channel 41, and the heating channel 51 remains uniform. When the external airflow... When the airflow passes through the first flow channel 31 and the second flow channel 41, it can achieve relatively uniform heating of the airflow. However, when the above components are not arranged coaxially, the radial distance between the first flow channel 31, the second flow channel 41 and the heating channel 51 will no longer be the same. This will cause uneven heating when the external airflow moves in the first flow channel 31 and the second flow channel 41, which is not conducive to controlling the heating temperature of the airflow. Therefore, as a preferred option, the first cylinder 3, the second cylinder 4 and the heating tube 5 are all arranged coaxially and spaced apart in the shell 1.

[0064] It is understood that the heating element 5 in this solution can be a structure that generates heat when energized. For example, the heating element 5 may include a tubular insulating structure, and the inner cavity of the insulating structure forms a heating channel 51. Heating wires are evenly distributed on the outer and / or inner peripheral surfaces of the insulating structure. The heating wires are connected to a power supply component (such as a lithium-ion battery) via wires, and the power supply component can be located inside the housing 1, thereby supplying power to the heating wires, which in turn generates heat, thereby achieving the effect of heating the flowing air. For example, the insulating structure may be a ceramic structure with good insulation and high temperature resistance. In order to transfer the power from the power supply component to the heating wires on the surface of the insulating structure, a wiring channel may be reserved in the housing 1 above or below the first flow channel 31, the second flow channel 41, and the heating channel 51 for the laying of wires.

[0065] In this embodiment, in order to improve the uniformity of heat distribution on the heating tube 5, the heating wire is evenly arranged on the outer and / or inner peripheral sides of the insulating structure, thereby enabling the heat to be evenly distributed on the insulating structure.

[0066] Reference Figure 2 , Figure 6 , Figure 8 As shown, in one embodiment of this application, the bottom of the housing 1 has a mounting base 11. The mounting base 11 has a first limiting ring 1111, a second limiting ring 1112, and a third limiting ring 1113 on the side facing the heating chamber 2. The first limiting ring 1111, the second limiting ring 1112, and the third limiting ring 1113 extend a certain distance towards the heating chamber 2. The inner diameter of the first limiting ring 1111 matches the outer diameter of the first cylinder 3, the inner diameter of the second limiting ring 1112 matches the outer diameter of the second cylinder 4, and the inner diameter of the third limiting ring 1113 matches the outer diameter of the heating tube 5. This allows the heating tube 5 to be heated when the first cylinder... When the bottom of the first cylindrical body 3 is inserted into the first limiting ring 1111, the outer periphery of the first cylindrical body 3 is tightly fitted and abutted against the inner periphery of the first limiting ring 1111, thus achieving the fixed installation of the first cylindrical body 3; when the bottom of the second cylindrical body 4 is inserted into the second limiting ring 1112, the outer periphery of the second cylindrical body 4 is tightly fitted and abutted against the inner periphery of the second limiting ring 1112, thus achieving the fixed installation of the second cylindrical body 4; when the bottom of the heating tube 5 is inserted into the third limiting ring 1113, the outer periphery of the heating tube 5 is tightly fitted and abutted against the inner periphery of the third limiting ring 1113, thus achieving the fixed installation of the heating tube 5.

[0067] In this embodiment, as Figure 2 , Figure 6 , Figure 8As shown, the mounting base 11 includes a support base 112 and a clamping base 111, wherein the clamping base 111 is disposed on the support base 112; along the height direction of the heating device, a first hole 1114 is provided through the clamping base 111 located between the first limiting ring 1111 and the second limiting ring 1112, a second hole 1115 is provided through the clamping base 111 located between the second limiting ring 1112 and the third limiting ring 1113, and a third hole 1115 is provided through the clamping base 111 located inside the third limiting ring 1113. 116; wherein the first hole 1114 is connected to the external environment, and the second hole 1115 is connected to the third hole 1116, thereby enabling the external airflow to enter the first flow channel 31 through the first hole 1114 and then enter the second flow channel 41 through the side of the first flow channel 31 facing the heating chamber 2, and then enter the heating channel 51 through the cooperating second hole 1115 and third hole 1116, thereby enabling the external airflow to move along a predetermined path in the first flow channel 31, the second flow channel 41 and the heating channel 51 and achieve heating.

[0068] In this embodiment, the support seat 112 is fixedly installed inside the housing 1, and the clamping seat 111 is installed on the support seat 112, such as... Figure 6 As shown, along the height direction of the heating device, a connecting hole 1121 is provided on the support 112 at a position corresponding to the first hole 1114, allowing external airflow to enter the first flow channel 31 through the connecting hole 1121 and the first hole 1114; it can be understood that, as Figure 8 As shown, multiple first holes 1114 and second holes 1115 can be provided, and multiple first holes 1114 and second holes 1115 are arranged at intervals around the axial center line of the heating channel 51, thereby improving the flow efficiency of airflow between the first channel 31, the second channel 41 and the heating channel 51.

[0069] In this embodiment, since the heating element 5 is mounted on the clamping seat 111, in order to further improve the safety of the heating device, the mounting seat 11 is divided into a clamping seat 111 and a bearing seat 112. The clamping seat 111 can be made of insulating material to prevent the current generated by the heating wire on the heating element 5 from leaking out through the clamping seat 111, thereby improving the safety of the heating device.

[0070] Reference Figure 6 As shown, in one embodiment of this application, a first exchange chamber 6 is formed on the side of the mounting base 11 away from the heating chamber 2, and the second hole 1115 and the third hole 1116 are connected through the first exchange chamber 6; thereby, when the airflow moves from top to bottom in the second flow channel 41, it first enters the first exchange chamber 6 through the second hole 1115, then enters the third hole 1116 through the first exchange chamber 6, and finally enters the heating channel 51.

[0071] In this embodiment, as Figure 6 As shown, the first exchange chamber 6 has an opening 61 at the end away from the heating chamber 2 that communicates with the outside. The heating device also includes a bottom cover 7, which is movably covered at the opening 61 for opening or closing the opening 61. When the bottom cover 7 is placed at the opening 61, the opening 61 is blocked, thereby preventing the first exchange chamber 6 from communicating with the outside. When the heating device is working, the airflow entering the first exchange chamber 6 from the second flow channel 41 will not flow out through the opening 61, thus guiding the airflow into the heating channel 51 through the third hole 1116.

[0072] It is understood that, since the first exchange cavity 6 is formed between the clamping seat 111 and the bearing seat 112, in order to improve the sealing performance at the connection between the clamping seat 111 and the bearing seat 112, a third sealing ring 1118 can be provided at the connection between the clamping seat 111 and the bearing seat 112. The third sealing ring 1118 is arranged in a ring shape and is clamped between the clamping seat 111 and the bearing seat 112, thereby sealing the gap at the connection between the clamping seat 111 and the bearing seat 112. For example, the third sealing ring 1118 can be a silicone part.

[0073] In this embodiment, a specific structure for the bottom cover 7 is provided, such as... Figure 2 , Figure 6 As shown, an installation cavity 71 is provided inside the bottom cover 7 at a position corresponding to the first exchange cavity 6, and a receiving plate 72 is fixedly installed inside the installation cavity 71 (the receiving plate 72 is flush with the side of the bottom cover 7 facing the heating chamber 2). The receiving plate 72 is arranged in a ring shape, and the receiving plate 72 and the installation cavity 71 are connected by riveting. A second magnetic element 73 (magnet) is also clamped between the receiving plate 72 and the installation cavity 71. A second magnetic conductive element 1117 (such as iron) is also clamped between the clamping seat 111 and the bearing seat 112. The second magnetic conductive element 1117 is also arranged in a ring shape. Thus, when the bottom cover 7 is placed on the opening 61, the magnetic force between the second magnetic element 73 and the second magnetic conductive element 1117 can restrict the bottom cover 7 and prevent the bottom cover 7 from being easily opened.

[0074] In this embodiment, the receiving plate 72 is used to collect the soot produced by the dry burning of tobacco leaves in the heating chamber 2. Soot is produced when the tobacco leaves in the heating chamber 2 are dry burned, and some of the soot will fall down through the heating channel 51 connected to the heating chamber 2 and fall onto the receiving plate 72, thereby collecting the soot. After the user finishes using the equipment, the bottom cover 7 can be opened and the soot that has fallen onto the receiving plate 72 can be cleaned.

[0075] In this embodiment, as Figure 6 , Figure 9As shown, the second magnetic conductive element 1117 has a protrusion extending radially outward along one end of the periphery facing the heating chamber 2, and the side of the second magnetic conductive element 1117 facing the heating chamber 2 presses against the third sealing ring 1118, and cooperates with the protrusion to snap the second magnetic conductive element 1117 onto the support seat 112.

[0076] Reference Figure 2 , Figure 6 As shown, in one embodiment of this application, the heating device further includes a top cover 8 disposed within the housing 1, and the top cover 8 is disposed at the upper end of the first cylinder 3. Exemplarily, this embodiment provides a specific structure of the top cover 8, which includes a first cover body 81, a support cylinder 83, and a first sealing ring 82 sandwiched between the first cylinder 3 and the support cylinder 83. The first sealing ring 82 may be a silicone part. The heating chamber 2 is embedded inside the support cylinder 83. Since the upper end of the heating tube 5 is in contact with the heating chamber 2, in order to improve the safety of the heating device (avoid leakage), a first sealing ring 82 is sandwiched between the support cylinder 83 and the first cover body 81, thereby achieving an insulated connection between the support cylinder 83 and the first cover body 81 (improving the safety of the heating device).

[0077] In this embodiment, the top cover 8, the support cylinder 83, and the heating chamber 2 enclose the space above the first cylinder 3 and the second cylinder 4 to form a second exchange chamber 9. The ends of the first flow channel 31 and the second flow channel 41 facing the heating chamber 2 are both connected to the second exchange chamber 9. This allows the airflow flowing upward from the first flow channel 31 to enter the second flow channel 41 after passing through the second exchange chamber 9, thus achieving the connection between the ends of the first flow channel 31 and the second flow channel 41 facing the heating chamber 2. It can be understood that the first sealing ring 82 clamped between the support cylinder 83 and the first cover 81 can also seal the gap at the joint between the support cylinder 83 and the first cover 81 to ensure the airtightness of the second exchange chamber 9, so that when the airflow enters the second exchange chamber 9 upward through the first flow channel 31, it will not leak outward from the gap at the joint between the support cylinder 83 and the first cover 81.

[0078] In this embodiment, the support cylinder 83 is fixedly installed inside the housing 1, and is covered on the upper end of the first cylinder 3 by the first sealing ring 82 and the first cover 81. This, together with the mounting seat 11 located at the bottom of the housing 1, clamps and fixes the first cylinder 3 inside the housing 1, ensuring the stability of the installation of the first cylinder 3.

[0079] Reference Figure 2 , Figure 3 , Figure 4 , Figure 6As shown, in one embodiment of this application, the heating chamber 2 includes a first cup body 21 and a second cup body 22; wherein, the first cup body 21 is embedded in the support cylinder 83, and the bottom of the first cup body 21 has a connecting pipe 211 that is inserted into the heating tube 5, as shown. Figure 4 As shown, the connecting tube 211 communicates with the inner space of the first cup body 21, and the outer diameter of the connecting tube 211 is consistent with the inner diameter of the heating tube 5. This ensures that when the connecting tube 211 is inserted into the heating tube 5, the connecting tube 211 and the inner wall of the heating tube 5 fit tightly together, ensuring that when the hot air flows upward through the connecting tube 211 into the first cup body 21, there will be no leakage from the gap between the connecting tube 211 and the inner wall of the heating tube 5.

[0080] In this embodiment, the second cup 22 is used to hold tobacco leaves, and the second cup 22 is housed within the first cup 21. The bottom of the second cup 22 is spaced apart from the bottom of the first cup 21, as shown below. Figure 4 As shown, a fourth hole 221 is provided through the bottom of the second cup body 22 (multiple fourth holes 221 can be provided, and multiple fourth holes 221 are spaced apart around the axial center line of the second cup body 22); as Figure 6 As shown, the hot airflow first enters the first cup body 21 through the connecting pipe 211 in the heating tube 5, and then enters the second cup body 22 through multiple fourth holes 221, thereby heating the tobacco leaves in the second cup body 22 and realizing the dry burning process.

[0081] It is understandable that by placing a slight distance between the bottom of the second cup 22 and the bottom of the first cup 21, the hot airflow entering the first cup 21 through the connecting pipe 211 will first diffuse to a certain extent in the space between the bottom of the first cup 21 and the bottom of the second cup 22, and then enter the second cup 22 upward through multiple fourth holes 221 surrounding the axial center line of the second cup 22. This can improve the uniformity of the distribution of hot airflow in the second cup 22 and achieve a more uniform heating effect.

[0082] Reference Figure 2 , Figure 3 , Figure 4 As shown, in one embodiment of this application, the heating device further includes a suction nozzle 10, which is movably disposed above the second cup body 22, and the suction nozzle 10 has a suction channel 101 communicating with the outside and the second cup body 22, as shown. Figure 2 As shown, when the mouthpiece 10 is placed on top of the second cup body 22, the user can use the mouthpiece 10 to inhale the smoke generated by the dry burning of the tobacco leaves in the second cup body 22. That is, the smoke generated by the dry burning of the tobacco leaves in the second cup body 22 moves upward through the suction channel 101 in the mouthpiece 10 and is drawn into the user's body.

[0083] In this embodiment, a specific structure of the suction nozzle 10 is provided, as follows: Figure 4 As shown, the suction nozzle 10 has a pressure plate 103 on the side facing the second cup body 22 (the pressure plate 103 has a through hole for the flow of smoke), and a first magnetic element 104 (magnet) is provided in the suction channel 101 on the side of the pressure plate 103 facing away from the second cup body 22. The first magnetic element 104 is arranged in a ring shape. The pressure plate 103 is fixedly installed on the side of the suction nozzle 10 facing the second cup body 22 by riveting, thereby clamping and fixing the first magnetic element 104 in the suction channel 101. A first magnetic conductor 85 (also arranged in a ring shape, which can be iron, etc.) is fixedly provided in the housing 1 at the position corresponding to the first magnetic element 104. (Material) When the mouthpiece 10 is placed on top of the second cup body 22, the mouthpiece 10 is able to maintain its current position stably under the magnetic force between the first magnetic element 104 and the first magnetic conductive element 85, without easily moving, so as to ensure the stability of the mouthpiece 10 when the user is sucking; when the user finishes sucking, the user can apply a little force to the mouthpiece 10 in the direction away from the second cup body 22, so that the mouthpiece 10 is released from the magnetic attraction between the first magnetic conductive element 85 and the first magnetic element 104 and opened, so as to facilitate the cleaning of the soot produced by the dry burning of tobacco leaves in the second cup body 22.

[0084] In this embodiment, as Figure 4 , Figure 5 As shown, the periphery of the end of the first magnetic conductive element 85 away from the nozzle 10 has a retaining ring 852 extending radially along the first magnetic conductive element 85, such that the first magnetic conductive element 85 is snapped into the housing 1 via the retaining ring 852 (the housing 1 has a retaining groove that engages with the retaining ring 852); as Figure 2 , Figure 3 As shown, the side of the first magnetic conductive element 85 facing away from the suction nozzle 10 presses against the upper end of the support cylinder 83, thereby fixing the first magnetic conductive element 85 inside the housing 1. Figure 2 , Figure 3 As shown, a second sealing ring 84 (which can be a silicone part) is provided between the first magnetic conductive element 85, the support cylinder 83, and the second cup body 22 support. It can be understood that since the first cup body 21 is in direct contact with the heating tube 5, in order to ensure good insulation performance, an insulating second sealing ring 84 is provided between the first cup body 21 and the first magnetic conductive element 85. This can effectively prevent leakage current from being transmitted to the first magnetic conductive element 85, ensuring safety in use. At the same time, the second sealing ring 84 can also seal the gap at the connection between the first magnetic conductive element 85 and the first cup body 21, preventing smoke or gas from leaking from the above-mentioned location.

[0085] Reference Figure 3 , Figure 4As shown in one embodiment of this application, the suction channel 101 has a filter 102. The filter 102 is provided to prevent the tobacco leaves in the second cup 22 and the ash produced by the tobacco leaves from being sucked into the user's mouth along with the smoke when the user is sucking. The filter 102 can filter out some ash particles and tobacco leaves in the smoke, thereby improving the user experience.

[0086] Understandably, the filter 102 can be fixed in the suction channel 101 by the clamping of the pressure plate 103 and the first magnetic element 104.

[0087] Reference Figure 3 , Figure 4 As shown, in one embodiment of this application, the second cup body 22 is detachably disposed inside the first cup body 21. By detachably installing the second cup body 22 inside the first cup body 21, it is possible to directly remove the second cup body 22 from the first cup body 21 when the smoking ends, and thoroughly clean the ash inside, as well as rinse and clean the inner wall of the second cup body 22, thereby facilitating cleaning by the user.

[0088] In this embodiment, a structure is provided in which the second cup body 22 can be detachably installed inside the first cup body 21, such as... Figure 5 As shown, a stop surface 851 is provided on the inner side of the first magnetic conductive element 85, such as... Figure 7 As shown, an extension 222 is provided on the circumference of the upper end of the second cup body 22. When the second cup body 22 is placed into the first cup body 21, the extension 222 on the circumference of the upper end of the second cup body 22 just abuts against the stop surface 851 of the first magnetic conductor 85, and a slight distance is provided between the bottom of the second cup body 22 and the bottom of the first cup body 21; Figure 3 As shown, in this embodiment, the pressure plate 103 can be set in a conical shape. When the suction nozzle 10 is placed on top of the second cup body 22, the conical outer peripheral side of the pressure plate 103 just presses against the extension 222 on the peripheral side of the second cup body 22, thereby achieving the positioning of the second cup body 22 to ensure the stability of the second cup body 22 in the housing 1 when the user is sucking.

[0089] Understandably, when the user finishes inhaling, the nozzle 10 is opened, and the pressure plate 103 moves synchronously with the nozzle 10 and no longer presses against the extension 222 on the upper periphery of the second cup body 22. At this time, the user can remove the second cup body 22 from the first cup body 21 and perform cleaning operations.

[0090] 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 heating device, characterized in that, include: case; The first flow channel is located inside the housing; The second flow channel is located inside the first flow channel; A heating channel is located inside the second flow channel; and A heating chamber for holding tobacco leaves is installed inside the housing and located above the heating channel, with the upper end of the heating channel communicating with the heating chamber. The first flow channel and the second flow channel are connected at their ends near the heating chamber, and the second flow channel and the heating channel are connected at their ends away from the heating chamber. The end of the first flow channel away from the heating chamber is connected to the outside.

2. The heating device as described in claim 1, characterized in that, The heating device also includes: The first cylindrical body is installed inside the housing; and The second cylinder is disposed inside the first cylinder, and the second cylinder is spaced apart from the first cylinder to form the first flow channel between the first cylinder and the second cylinder; A heating element is disposed inside the second cylinder, and the heating element is spaced apart from the second cylinder to form a second flow channel between the second cylinder and the heating element; the inner cavity of the heating element forms the heating channel; In the height direction of the heating device, the first cylinder, the second cylinder, and both ends of the heating tube are all connected through it.

3. The heating device as described in claim 2, characterized in that, The bottom of the housing has a mounting base, and the mounting base has a first limiting ring, a second limiting ring, and a third limiting ring on the side facing the heating chamber; The first cylindrical body is inserted into the first limiting ring, the second cylindrical body is inserted into the second limiting ring, and the heating element is inserted into the third limiting ring; The mounting base located between the first limiting ring and the second limiting ring has a first hole communicating with the outside and the first flow channel; the mounting base located between the second limiting ring and the third limiting ring has a second hole communicating with the second flow channel; the mounting base located inside the third limiting ring has a third hole communicating with the heating channel, and the second hole and the third hole are in communication.

4. The heating device as described in claim 3, characterized in that, The mounting base has a first exchange cavity formed on the side opposite to the heating chamber, and the second hole and the third hole are connected through the first exchange cavity.

5. The heating device as described in claim 4, characterized in that, The mounting base has an opening at the end opposite to the heating chamber that connects to the outside and the first exchange chamber; The heating device also includes a bottom cover, which is movably disposed over the opening for opening or closing the opening.

6. The heating device according to any one of claims 2-5, characterized in that, The heating device further includes a top cover disposed inside the housing, and the top cover is disposed at the upper end of the first cylinder; The top cover is inserted into the inner side of the first cylinder, and the heating chamber is embedded in the top cover. The top cover and the heating chamber enclose the space above the first cylinder and the second cylinder to form a second exchange cavity. The first flow channel and the second flow channel are connected to the heating chamber via the second exchange chamber at the end facing the heating chamber.

7. The heating device as described in claim 6, characterized in that, The heating chamber includes: A first cup body is embedded within the top cover, and the bottom of the first cup body has a connecting tube that inserts into the heating element; and The second cup is used to hold tobacco leaves. The second cup is housed within the first cup, and the bottom of the second cup is spaced apart from the bottom of the first cup. A fourth hole is provided through the bottom of the second cup. Hot air flows through the heating channel, the connecting pipe, and the fourth hole into the second cup to heat the tobacco leaves inside the second cup.

8. The heating device as described in claim 7, characterized in that, The heating device also includes a suction nozzle, which is movably covered above the second cup body; The nozzle has a suction channel that connects to the outside and the second cup body.

9. The heating device as described in claim 8, characterized in that, The suction channel contains a filter screen.

10. The heating device as claimed in claim 7, characterized in that, The second cup body is detachably disposed within the first cup body.

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