Patent Publication Number: US-2023132723-A1

Title: Vaping device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     Pursuant to 35 U.S.C.§ 119 and the Paris Convention Treaty, this application claims foreign priority to Chinese Patent Application No. 202111282512.8 filed Nov. 1, 2021, and to Chinese Patent Application No. 202122647445.7 filed Nov. 1, 2021. the contents of which, including any intervening amendments thereto, are incorporated herein by reference. Inquiries from the public to applicants or assignees concerning this document or the related applications should be directed to: Matthias Scholl P.C., Attn.: Dr. Matthias Scholl Esq., 245 First Street, 18th Floor, Cambridge, Mass. 02142. 
     BACKGROUND 
     The disclosure relates to a vaping device. 
     A conventional vaping device includes a heating element in direct contact with the tobacco material, so that the tobacco material is heated unevenly, thus affecting the taste of tobacco smoke. 
     SUMMARY 
     The disclosure provides a vaping device. 
     The following advantages are associated with the vaping device of the disclosure: the vaping device comprises a first chamber for concentrating the heat produced by a heating element; and external air transfers the heat throughout the tobacco material, thus improving the taste of tobacco smoke. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is an exploded view of a vaping device according to one example of the disclosure; 
         FIG.  2    is a perspective view of a vaping device according to one example of the disclosure; 
         FIG.  3    is a cross-sectional view of a vaping device according to one example of the disclosure; 
         FIG.  4    is an exploded view of a heating assembly according to one example of the disclosure; 
         FIG.  5    is a perspective view of a heating assembly according to one example of the disclosure; 
         FIG.  6    is a bottom perspective view of a holder according to one example of the disclosure; 
         FIG.  7    is a cross-sectional view of a heating assembly according to one example of the disclosure; and 
         FIG.  8    is a cross-sectional view including arrows showing the direction of the airflow in a vaping device according to one embodiment of the disclosure. 
     
    
    
     In the drawings, the following reference numbers are used:  1 . Mirror;  2 . Light guide ring;  3 . Screw;  4 . Shell;  5 . Power button;  6 . Second cover  7 . Circuit board;  8 . Negative plate;  9 . Support frame;  10 . Thermally-insulating ring;  11 . Temperature sensor;  12 . Temperature monitoring tube;  13 . Sleeve;  14 . Second electrode connector;  15 . First insulator;  16 . First electrode connector;  17 . fist cover;  18 . Second screw;  19 . Second electrode;  20 . First electrode;  21 . Second insulator;  22 . Second fixing part;  23 . First fixing part;  24 . First headwall;  25 . Heating element;  26 . Holder;  27 . Thermally-insulating gasket;  28 . Base;  29 . Tobacco chamber;  100 . Heating assembly;  200 . Control assembly;  300 . Heat dissipation space;  401 . Fourth cavity;  901 . Fifth through hole;  1401 . Third channel;  1601 . Fin;  1602 . First channel;  1701 . Second through hole;  1702 . Third cavity;  1703 . Second chamber;  1704 . Air channel;  1705 . Third headwall;  1706 . Second sidewall;  2001 . Second channel;  2301 . Fourth through hole;  2401 . Air inlet;  260 . Partition;  2601 . Separate part;  2602 . Hole;  2603 . First sidewall;  2604 . Air outlet;  2605 . First chamber;  2606 . Opening;  2607 . Main partition;  2607   a;  First main partition;  2607   b.  Second main partition;  2607   c . Third main partition;  2608 . Auxiliary partition;  2608   a.  First auxiliary partition;  2608   b . Second auxiliary partition;  2608   c.  Third main partition;  2609 . Second headwall;  2610 . Flange;  2801 . Third sidewall;  2802 . First through hole;  2809 . Fourth headwall;  2901 . First cavity; and  2902 . Exhaust pipe. 
     DETAILED DESCRIPTION 
     To further illustrate the disclosure, embodiments detailing a vaping device are described below. It should be noted that the following embodiments are intended to describe and not to limit the disclosure. 
     The term “tobacco material”, as used herein, refers to those substances which can be heated, burned, or atomized to produce smoke that typically contains nicotine, and/or flavoring. The tobacco material is liquid, solid, or semisolid. The solid tobacco material is typically cut into thin slices or strips. The tobacco material may be a natural or processed tobacco, such as tobacco tar, tobacco paste, tobacco leaf, or other materials. The processed tobacco contains mainly glycerin, propylene glycol, and nicotine. The tobacco material may be enclosed in an outer shell. The outer shell, such as microcapsules, is broken down at high temperatures and thus volatile substances are released. 
     The tobacco material is classified into nicotine-containing tobacco or nicotine-free tobacco. The nicotine-free tobacco contains mainly aroma substances, such as fragrance agents, which can be atomized to simulate aspects of cigarette smoking, thus increasing smoker&#39;s odds of quitting smoking. In certain examples, the fragrance agents comprise peppermint oil. Optionally, the tobacco materials further comprise other additives, such as glycerin and/or propylene glycol. 
     The term “heating assembly”, as used herein, refers to a device that converts electrical energy into thermal energy for heating the tobacco material. 
     The term “heating element”, as used herein, refers to a component that generates heat by converting electrical energy into thermal energy or by inducing electrical currents in response to a changing magnetic field. In other words, the heating element is energized to produce heat or is disposed in a magnetic field in a coil to transfer heat energy to the tobacco material. 
     In certain examples, as shown in  FIG.  7   , the vaping device comprises a heating assembly  100 ; the heating assembly  100  comprises a first chamber  2605  and a heating element  25  disposed in the first chamber  2605 ; the first chamber  2605  comprises a first air intake part and an air release part; the tobacco material is disposed outside of the first chamber  2605 , and the air release part is disposed toward the tobacco material. Understandably, the first air intake part and air release part are holes or channels through which the air or smoke can flow away; the tobacco material is disposed outside of the first chamber  2605  without any contact with the heating element  25 ; external air flows through the first air intake part into the first chamber  2605 , forcing the air heated by the heating element  25  from the first chamber  2605  through the air release part to the tobacco material, thus improving the taste of tobacco smoke. 
     The heating element  25  comprises a conductive material including, not limited to, a conductive metal, graphene, and carbon nanomaterials. 
     In certain examples, as shown in  FIGS.  4 - 7   , the heating assembly  100  comprises a first headwall  24 , a second headwall  2609 , and a first sidewall  2603 ; the first headwall  24  and the second headwall  2609  are disposed on both ends of the first sidewall  2603 ; the first chamber  2605  is surrounded by the first headwall  24 , the second headwall  2609 , and the first sidewall  2603 ; the first air intake part is disposed on the first headwall  24 , and the air release part is disposed on the second headwall  2609 . In certain examples, the second headwall  2609  is formed integrally with the first sidewall  2603  to form a holder  26 ; the second headwall  2609  and the first sidewall  2603  comprise thermally-conductive and electrically insulating materials, such as ceramics, glass, and quartz, which can increase the heating area. In certain examples, the first headwall  24  comprises a thermally insulating material by which the heat is retained in the first chamber  2605  and transferred to the tobacco materials through the second headwall  2609  and the air release part; the thermally insulating material includes, but is not limited to, mica, agate, jade, and crystal, and preferably mica. The first headwall  24  may be formed integrally with, fixedly or detachably connected to the first sidewall  2603 . 
     In certain examples, the first sidewall  2603  comprises a distal end away from the second headwall  2609 ; the distal end extends radially outward to form a flange  2610 ; and the first headwall  24  is fixedly disposed on the flange  2610 . 
     In certain examples, the first air intake part comprises a plurality of air inlets  2401 , and the air release part comprises a plurality of air outlets; the plurality of air inlets  2401  communicates with the plurality of air outlets through the first chamber  2605 ; the projections of the plurality of air inlets  2401  onto the second headwall  2609  do not overlap with the plurality of air outlets. In this way, the hot air flow forms a vortex in the first chamber  2605 , which increases the moving distance of the hot air, thus reducing heat loss and improving heat utilization. 
     In certain examples, as shown in  FIGS.  1 - 3   , the vaping device further comprises a tobacco chamber  29  comprising an open top (not shown); the tobacco chamber  29  comprises a first cavity  2901  for holding the tobacco material; the second headwall  2609  is disposed on the open top to cover the first cavity  2901 ; and the air release part (i.e. the plurality of air outlets  2604 ) is disposed toward the tobacco material to concentrate the heat, thus reducing heat loss and speeding up the process of heating the tobacco material. 
     In certain examples, the vaping device further comprises a control assembly  200 ; a heat dissipation space  300  is formed between the control assembly  200  and the heating assembly  100  so as to prevent the heat of the heating assembly  100  from being transferred to the control assembly  200 , thus extending service life of the control assembly  200 . 
     In certain examples, the heating assembly  100  further comprises a distal end away from the tobacco material; the control assembly  200  is disposed on the distal end to keep a safe distance from the heating assembly  200  and extend its service life. 
     In certain examples, the vaping device further comprises a plurality of fins  1601  disposed in the heat dissipation space  300 ; the plurality of fins  1601  comprises a conductive metal, including but not limited to, an aluminum sheet, and a copper sheet. The plurality of fins is configured to increase heat dissipation and thus prevents the control assembly  200  from overheating. 
     In certain examples, the control assembly  200  further comprises a shell  4  and a circuit board  7 ; and the shell  4  comprises a second cavity  401  in which the circuit board  7  is fixedly disposed. The shell  4  is configured to prevent the circuit board  7  from being damaged. 
     In certain examples, the vaping device further comprises a first electrode connector  16  and a second electrode connector  14 ; the heating element  25  is electrically connected to the circuit control board  7  through the first electrode connector  16  and the second electrode connector  14 ; the heat dissipation space  300  is formed outside the shell  4 ; the first electrode connector  16  and the second electrode connector  14  are, at least partially, disposed in the heat dissipation space  300 ; the plurality of fins is disposed on the first electrode connector  16  and/or the second electrode connector  14 . Understandably, the first electrode connector  16  and the second electrode connector  14  are made of conductive materials, including but not limited to, copper, silver, and aluminum; the first electrode connector  16  and the second electrode connector  14  are configured to conduct electricity, secure the control assembly  200  to the heating assembly  100 , and separate the control assembly  200  and the heating assembly  100 . 
     In certain examples, the heating assembly  100  further comprises a first electrode  20  and a second electrode  19 . The heating element  25  is electrically connected to the first electrode  20  and the second electrode  19 . The first electrode  20  and the second electrode  19  are electrically connected to the first electrode connector  16  and the second electrode connector  14 , respectively. Understandably, the first electrode connector  16 , the second electrode connector  14 , the first electrode  20 , and the second electrode  19  make the vaping device easy to assemble. The first electrode  20  and the second electrode  19  are made of conductive metals, including but not limited to, copper, silver, and aluminum. 
     In certain examples, the shell  4  comprises a through hole (not shown). One end of the first electrode connector  16  is disposed through the through hole into the second cavity  401  to electrically connect to the circuit board  7 ; another end of the first electrode connector  16  is disposed through the through hole and exposed outside the shell  4 , to electrically connect to the first electrode  20 . Understandably, the first electrode connector  16  is fixedly electrically connected to the first electrode  20  using any suitable connection mean, such as threaded screws, fasteners, and interference fits. 
     In certain examples, the first electrode connector  16  comprises a first channel  1602  in which the second electrode connector  14  is disposed; the vaping device further comprises a first insulator  15  disposed between the second electrode connector  14  and the first electrode connector  16 ; one end of the second electrode connector  14  is electrically connected to the circuit board  7 ; another end of the second electrode connector  14  is electrically connected to the second electrode  19 . Understandably, the second electrode connector  14  is electrically connected to the second electrode  19  using any desired connection means, such as threaded screws, fasteners, and interference fits. The first insulator  15  is made of silica gel, plastic, etc. The first insulator  15  is in the shape of a sleeve or a half-round sleeve. The first insulator  15  is disposed in the first channel  1602  to sleeve the second electrode connector  14 , thus insulating electricity and preventing changes in the position of the second electrode connector  14 . 
     In certain examples, the first electrode  20  comprises a second channel  2001  in which the second electrode  19  is disposed. The vaping device further comprises a second insulator  21  disposed between the second electrode  19  and the first electrode  20 . The second insulator  21  is made of silica gel, plastic, etc. The second insulator  21  is in the shape of a sleeve or a half-round sleeve. The second insulator  21  is disposed in the second channel  2001  to sleeve the second electrode  19 , thus insulating electricity and preventing changes in the position of the second electrode  19 . 
     In certain examples, the plurality of fins  1601  extends radially outward from the outer wall of the first electrode connector  16 ; the plurality of fins  1601  is made of a conductive metal which may be the same as that of the first electrode connector  16 ; the conductive metal is electrically and thermally conductive, includes, but is not limited to, copper, aluminum, and silver. Understandably, the plurality of fins  1601  is disposed at intervals in an axial direction along the outer wall of the first electrode connector  16 ; when the vaping device is energized, the heat is produced and transferred from the first electrode connector  16  to the plurality of fins  1601  for increased heat dissipation. 
     In certain examples, the vaping device further comprises a first cover  17  disposed outside the first headwall  24 ; a second chamber  1703  is formed between the first cover  17  and the first headwall  24 ; the vaping device further comprises a second air intake part disposed in the second chamber  1703 . Understandably, the first cover  17  is disposed above the heating assembly  100 ; the heat dissipation space  300  and the plurality of fins  1601  are disposed between the first cover  17  and the shell  4 ; the first electrode connector  16  is configured to separate the shell  4  and the first cover  7 ; the first cover  7  is configured for thermal insulation; the second chamber  1703  is configured to concentrate the heat, reduces heat loss, and allows the maximum airflow to flow through the heating assembly; and the second air intake part comprises at least one hole or channel. 
     In certain examples, the heating assembly  100  further comprises a base  28 ; the first cover  17  is disposed on the base  28 ; the first cover  17  comprises a third headwall  1705  and a second sidewall  1706 ; the third headwall  1705  is disposed on one end of the second sidewall  1706 ; a third cavity  1702  is surrounded by the third headwall  1705  and the second sidewall  1706 ; the first headwall  24  is disposed opposite to the third headwall  1705 ; the base  28  comprises a fourth headwall  2809  and a third sidewall  2801 ; the fourth headwall  2809  is disposed on one end of the third sidewall  2801 ; the second sidewall  1706  is disposed around the third sidewall  2801 , and an air channel  1704  is formed between the second sidewall  1706  and the third sidewall  2801 . The air channel  1704  functions as the second air intake part. Understandably, the third headwall  1705  is connected to the top part of the second sidewall  1706 ; the fourth headwall  2809  is connected to the bottom part of the third sidewall  2801 ; the air flows only through the air channel  1704  into the second chamber  1703  and is then heated by the heating assembly  100 ; so, the heated air flows up more readily to prevent the heat from escaping through the air channel  1704 ; the third headwall  1705  is formed integrally with the second sidewall  1706 ; and the fourth headwall  2809  is formed integrally with the third sidewall  2801 . 
     In certain examples, the fourth headwall  2809  comprises a first through hole  2802 , and the distal end of the first sidewall  2603  extends radially outward to form a flange  2610 ; the first sidewall  2603  and the second headwall  2609  are disposed through the first through hole  2802 , and the flange  2610  is disposed on the fourth headwall  2809 . Understandably, the first sidewall  2603 , the second headwall  2609 , and the flange  2610  are formed integrally and comprise a conductive material; the conductive material allows heat energy to be rapidly transferred from the heating element  25  to the first sidewall  2603  and the second headwall  2609 ; the first sidewall  2603  and the second headwall  2609  are disposed through the first through hole  2802  into the tobacco chamber  29  to concentrate the heat energy onto the tobacco material, thus speeding up the heating process; the base  28  is fitted together with the first cover  17  to form the air channel  1704 , and prevents the heat from escaping from the heating assembly  100 ; the third sidewall  2801  is extended upward with respect to the first headwall  24  so as to increase the length of the air channel  1704 , thus reducing heat loss. 
     In certain examples, the vaping device further comprises a thermally-insulating gasket  27  disposed between the fourth headwall  2809  and the flange  2610 . 
     In certain examples, the third headwall  1705  comprises a second through hole  1701 ; the heating assembly  100  is disposed through the second through hole  1701  so as to be energized by a power supply; the first electrode  20  is disposed in the second chamber  1703 ; the second electrode  19  is disposed in the second channel  2001 ; and the first electrode  20  is disposed through the second through hole  1701  so as to electrically connect to the first electrode connector  16 . 
     In certain examples, as shown in  FIGS.  4 - 6   , the heating element  25  is disposed in the first chamber  2605 ; when energized, the heating element  25  converts electrical energy into heat energy; a plurality of partitions is disposed on the second headwall  2609  so as to separate the first chamber into a plurality of separate parts  2601 . Understandably, the heating element  25  is disposed in the plurality of separate parts  2601 ; the plurality of partitions  260  is erected on the second headwall  2609 ; the plurality of partitions  260  is formed integrally with or fixed on the second headwall  2609 ; the plurality of separate parts  2601  is configured to prevent changes in the position of the heating element  25 , which avoids short circuit of the heating element  25 , thus reducing heat loss and concentrating the heat energy in the plurality of separate parts  2601 . 
     In certain examples, the plurality of separate spaces  2601  communicates with one another to form a passage; two ends of the heating element  25  extend in the passage so that the heating element stretches in each separate space; the vaping device comprises only one heating element  25 , comprising two pins for electricity conducting; the only one heating element  25  is electrically connected to the two pins using welded connection by which the production efficiency is improved in simple steps; and the length of the heating element  25  causes a rise in voltage and maximizes the amount of the heat produced. In certain examples, the plurality of separate parts  2601  need not communicates with one another; the heating assembly comprises a plurality of heating elements  25  disposed through the plurality of partitions  260 ; and the plurality of heating elements  25  is formed integrally with or connected to one another. 
     In certain examples, the plurality of partitions  260  comprises a plurality of main partitions  2607  with different sizes; each of the plurality of main partitions  2607  is in the shape of a ring with an opening  2606 ; a separate part  2601  is formed between every two adjacent main partitions  2607 ; a smaller main partition  2607  is disposed in an adjacent larger main partition, and the opening of the smaller main partition and the opening of the adjacent larger main partition are disposed in two opposite directions. Understandably, the plurality of main partitions  2607  can be any shape or form including a circular shape, an elliptical shape, and a polygonal shape (for example, a rectangular shape, a triangular shape, and a diamond shape). In certain examples, the plurality of main partitions  2607  comprises a first main partition  2607   a , a second main partition  2607   b,  and a third main partition  2607   c,  which are disposed in that order outward from center. The first main partition  2607   a  comprises a first opening; the second main partition  2607   b  comprises a second opening; and the third main partition  2607   c  comprises a third opening; the first main partition  2607  is surrounded by the second main partition  2607   b,  and the first opening and the second opening are disposed in two opposite directions; the second main partition  2607   b  is surrounded by the third main partition  2607   c,  and the second opening and the third opening are disposed in two opposite directions; the first opening and the third opening are disposed in the same direction. In certain examples, each of the plurality of main partitions  2607  is in the form of a sheet (as shown in  FIG.  7   ), and need not comprises any opening  2606 . In certain examples, the plurality of main partitions  2607  is spirally disposed on the second headwall  2609  and need not comprise any opening  2606 ; and the heating element  25  is matched with the plurality of separate parts  2601  in shape so that it can be disposed therein. 
     In certain examples, each of the plurality of partitions  260  further comprises a joint and an auxiliary partition  2608 ; the joint is disposed opposite to the opening; and the auxiliary partition extends from the joint through the opening of adjacent larger main partition. In certain examples, the plurality of main partitions  2607  comprises a first main partition  2607   a,  a second main partition  2607   b,  and a third main partition  2607   c,  which are disposed in that order outward from the center; the first main partition  2607   a  comprises a first opening and a first joint disposed opposite to the first opening; the second main partition  2607   b  comprises a second opening and a second joint disposed opposite to the second opening; and the third main partition  2607   c  comprises a third opening and a third joint disposed opposite to the third opening; the first main partition  2607  is surrounded by the second main partition  2607   b,  and the first opening and the second opening are disposed in two opposite directions; the second main partition  2607   b  is surrounded by the third main partition  2607   c,  and the second opening and the third opening are disposed in two opposite directions; the first auxiliary partition  2608   a  extends from the first joint to the third joint through the second opening; the second auxiliary partition  2608   b  extends from the second joint to the first sidewall  2603  through the second opening. The plurality of auxiliary partitions  2608  is configured to prevent short circuit caused by the heating element  25 . 
     In certain examples, the heating element  25  comprises a heating wire and/or a heating tube in a spiral shape that gives the maximum heating area. Preferably, the heating wire is in the shape of a spiral that gives the maximum length, offering advantages such as low electrical resistivity, high heat generation, and low power consumption; and the heat is transferred rapidly to the tobacco material to improve the taste of the tobacco smoke. 
     In certain examples, the heating assembly further comprises a temperature sensor  11  disposed in the first chamber  2605  and electrically connected to the circuit board  7 . Since toxic substances may be produced on heating the tobacco material at high temperature, the temperature sensor  11  is configured to regulate the operation of the heating element  25 , thus controlling the temperature of the first chamber  2605  and/or the second headwall  2609  and/or the first sidewall  2603 . The temperature sensor  11  is further configured to prevent the heating element  25  from overheating. 
     In certain examples, the temperature sensor  11  is disposed in or close to a middle position of the first chamber  2605  to measure air temperature accurately. 
     In certain examples, the heating assembly further comprises a temperature monitoring tube  12 ; and the second electrode connector  14  comprises a third channel  1401  in which the temperature monitoring tube  12  is disposed; the second electrode  19  comprises a third through hole (not shown); the temperature monitoring tube  12  is inserted into the first chamber  2605  through the third channel  1401  and the third through hole; and the first chamber  2605  comprises a hole  2602  into which one end of the temperature monitoring tube  12  is fixedly disposed. 
     In an alternative preferred examples of the disclosure, as shown in  FIGS.  1 - 7   , the vaping device comprises a mirror  1 , a light guide ring  2 , a first screw  3 , a shell  4 , a power button  5 , a second cover  6 , a circuit board  7 , a negative plate  8 , a support frame  9 , a thermally-insulating ring  10 , a temperature sensor  11 , a temperature monitoring tube  12 , a sleeve  13 , a second electrode connector  14 , a first insulator  15 , a first electrode connector  16 , a first cover  17 , a second screw  18 , a second electrode  19 , a first electrode  20 , a second insulator  21 , a second fixing part  22 ; a first fixing part  23 , a first headwall  24 , a heating element  25 , a holder  26 , a thermally-insulating gasket  27 , a base  28 , and a tobacco chamber  29 . 
     The holder  26  comprises a first sidewall  2603  and a second headwall  2609 . The second headwall is secured to one end of the first sidewall  2603  using integral formation. The top end of the first sidewall  2603  extends radially outward to form a flange  2610 . The first headwall  24  is fixedly disposed on the flange  2610  or the top end of the first sidewall  2603  by a fastener (e.g. a screw). The second headwall  2609  comprises a plurality of air outlets  2604  through which the air and heat can flow away. 
     The holder further comprises a plurality of main partitions  2607  disposed in order outward from center. Each of the plurality of main partitions  2607  is in the shape of a ring with an opening  2606 . A separate part  2601  is formed between every two adjacent main partitions  2607 . A smaller main partition  2607  is disposed in an adjacent larger main partition, and the openings of the smaller main partition  2607  and the adjacent larger main partition  2607  are disposed in two opposite directions. Each of the plurality of partitions  260  further comprises a joint and an auxiliary partition  2608 . The joint is disposed opposite to the opening; and the auxiliary partition extends from the joint through the opening of adjacent larger main partition. The heating element  25  is fixedly disposed in the separate part  2601  to convert electrical energy into heat energy. Each of the plurality of air outlets  2604  is disposed on the corresponding separate part  2601  and it communicates with one another through the separate part  2601 . 
     The base  28  comprises a fourth headwall  2809  and a third sidewall  2801 . The fourth headwall  2809  is disposed on one end of the third sidewall  2801 . The fourth headwall  2809  comprises a first through hole  2802  through which the first sidewall  2603  and the second headwall  2609  are inserted, and the flange  2610  is disposed on the fourth sidewall  2809 . The thermally-insulating gasket  27  is disposed between the fourth headwall  2809  and the flange  2610  to prevent heat transfer. 
     The first headwall  24  is disposed on the top part of the holder  26  to prevent the heat from escaping the separate part  2601 . The first fixing part  23  is fixedly disposed on the first headwall  24  and the base  28  so as to fix the first headwall  24 . The first headwall  24  comprises a plurality of air inlets  2401  communicating with the plurality of air outlets  2604 , respectively. The first fixing part  23  comprises a plurality of fourth through holes  2301  corresponding with the plurality of air inlets  2401 , respectively. The plurality of air inlets  2401 , the plurality of air outlets  2604 , and the plurality of fourth through holes  2301  are configured to allow the air and smoke to flow through. The plurality of air inlets  2401  is projected vertically on the second headwall  2609  to ensure that the projection and the plurality of air outlets  2604  do not overlap. 
     The shell  4  comprises a fourth cavity  401  in which the circuit board  7  is fixedly disposed to regulate the operation of the heating element  25 . The power button  5  is disposed on the circuit board  7 , and the top part of the power button is exposed outside the top part of the shell  4 . The light guide ring  2  is fixedly disposed on the top part of the shell  4  by a first screw  3  so as to display information about working state. The mirror  1  is attached to the top part of the shell  4  to give an improved visual aesthetic. The support frame  9  is disposed on the bottom part of the casing  4  to fix the circuit board  7  in the fourth cavity  401 . The support frame  9  comprises a fifth through hole  901  in which the thermally-insulating ring  10  is fixedly disposed. The top part of the first electrode connector  16  is disposed through the thermally-insulating ring  10  into the fourth cavity  401 . The negative plate  8  is disposed on the top part of the first electrode connector  16  to conduct electricity. The second cover  6  is disposed on the top part of the first electrode connector  16  so as to fix the negative plate  8  on the first electrode connector  16 . The circuit board  7  comprises an output terminal, comprising a positive electrode and a negative electrode. The negative electrode of the circuit board  7  is soldered to the negative plate  8  to conduct electricity. The first electrode connector  16  is disposed outside of the fourth cavity  401 . The outer wall of the first electrode connector  16  comprises a plurality of fins which is formed integrally with one another to increase heat dissipation. The first electrode connector  16  comprises a first channel  1602  in which the second electrode connector  14  is fixedly disposed. The positive electrode of the circuit board  7  is soldered to the second electrode connector  14 . The first insulator  15  is disposed between the second electrode connector  14  and the first electrode connector  16  so as to prevent short circuit. 
     The first cover  17  is disposed on the base  28 . The first cover  17  comprises a second sidewall  1706  and a third headwall  1705  disposed on one end of the second sidewall  1706 . A third cavity  1702  is surrounded by the third headwall  1705  and the second sidewall  1706 . The first headwall  14  is disposed opposite to the third headwall  1705 . The base  28  comprises a third sidewall  2801  and a fourth headwall  2809  disposed on one end of the third sidewall  2801 . The second sidewall  1706  is disposed around the third sidewall  2801 , and an air channel  1704  is formed between the second sidewall  1706  and the third sidewall  2801 . The air channel  1704  functions as a second air intake part. The third headwall  1705  comprises a second through hole  1701 . The bottom part of the first electrode connector  16  is disposed through the second through hole  1701  into the third cavity  1702 . The top part of the first electrode  20  is screwed to the bottom part of the first electrode connector  16  so that the first electrode connector  16  is secured to the first cover  17 . The first electrode  20  comprises a second channel  2001 . The second insulator  21  is disposed in the second channel  2001  to sleeve the second electrode  19 . The top part of the second electrode  19  is connected to the bottom part of the second electrode connector  14 , and the bottom part of the second electrode  19  is wrapped around the second fixing part  22 . The first electrode  20  is fixedly disposed on the first fixing part  23  by the second screw  18 . 
     A second chamber  1703  is formed between the first cover  17  and the first headwall  24 . The air channel  1704  communicates with the second chamber  1703  so as to allow external air to enter the second chamber  1703 . 
     The second electrode connector  14  comprises a third channel  1401  in which the temperature monitoring tube  12  is disposed. The sleeve  13  is disposed on the top part of the inside of the third channel  1401  so as to fix the temperature monitoring tube  12  in the third channel  1401 . The first chamber  2605  comprises a hole  2602 . The temperature monitoring tube  12  is disposed through the sleeve  13 , the third channel  1401 , and the second electrode  19  successively, and enters the hole  2602 . The temperature sensor  11  is disposed in the temperature monitoring tube  12  and electrically connected to the circuit board  7  to monitor the temperature of the heating element  25 . When the temperature exceeds a setpoint value, the temperature sensor  11  sends the temperature feedback to the circuit board  7 , and the circuit board  7  maintains the heating element at a desired temperature, thus preventing the heating element from overheating. The heating element  25  comprises an input terminal, comprising a positive electrode and a negative electrode. The positive electrode of the heating element  25  is soldered to the second fixing part  22 , and the negative electrode is soldered to the first electrode  20 . 
     The tobacco chamber  29  comprises a first cavity  2901  for holding the tobacco materials. The bottom end of the tobacco chamber  29  shrinks and extends axially to form an exhaust pipe  2902 . The exhaust pipe  2902  communicates with the tobacco chamber  29 . The second headwall  2609  is disposed on the open top of the tobacco chamber  29 . 
       FIG.  8    is a cross-sectional view including arrows showing the direction of airflow in the vaping device of the disclosure. When the heating element  25  is energized, the heat is produced and concentrated in the first chamber. When the user smokes the tobacco material, external air flows through the air channel  1704 , the second chamber  1703 , the plurality of air inlets, the plurality of fourth through holes  2301 , and the separate part  2601  successively, forcing the heat from the first chamber through the plurality of air outlets to the tobacco chamber. Thus, the tobacco material is heated to produce smoke. 
     It will be obvious to those skilled in the art that changes and modifications may be made, and therefore, the aim in the appended claims is to cover all such changes and modifications.