CN204120226U - Electronic tobacco evaporator - Google Patents
Electronic tobacco evaporator Download PDFInfo
- Publication number
- CN204120226U CN204120226U CN201420390663.4U CN201420390663U CN204120226U CN 204120226 U CN204120226 U CN 204120226U CN 201420390663 U CN201420390663 U CN 201420390663U CN 204120226 U CN204120226 U CN 204120226U
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- China
- Prior art keywords
- insulation layer
- heat generating
- generating core
- thermal insulation
- heat
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/20—Devices using solid inhalable precursors
Abstract
The utility model provides a kind of electronic tobacco evaporator, comprise shell and be arranged on the vaporization chamber for containing being evaporated material in described shell, also comprise and be set in thermal conducting sleeve outside described vaporization chamber and heat generating core successively, and the region insulation that described heat generating core contacts with described thermal conducting sleeve; Described heat generating core is enclosed with heat insulation foam, the first thermal insulation layer and the second thermal insulation layer outward successively, has predetermined gap between described first thermal insulation layer and the second thermal insulation layer.By wrapping up heat insulation foam, the first thermal insulation layer and the second thermal insulation layer outward successively at heat generating core, and predetermined gap is set between the first thermal insulation layer and the second thermal insulation layer, thus carry out effectively heat insulation to the heat of heat generating core, reduce the temperature of shell, and make the temperature of shell remain on normal temperature, efficiently solve the shell when user sucks electronic tobacco evaporator hot and scald the problem of user, improve Consumer's Experience.
Description
Technical field
The utility model relates to electric-heating technology field, more particularly, relates to a kind of electronic tobacco evaporator.
Background technology
Evaporimeter is typically used as the thermal source of smoking apparatus or medicament fumigating device.In use, cigarette, pipe tobacco, medicinal herbs or volatile medicine are waited for that evaporated material puts into the heating container of evaporimeter, evaporimeter produces heat and is evaporated by material to be evaporated, to obtain its active ingredient.There is electronic tobacco evaporator in the market, namely adopted electric energy by the heat generating core heating in smoking set, then by heating core, the result of combustion of tobacco in tobacco storeroom is produced smog, suck for smoker.
Through a large amount of technical research, find that the temperature between 100 ~ 300 DEG C ensures pipe tobacco fragrance volatilizing and ensures that the optimum temperature of cracking does not occur pipe tobacco, but the heater of existing electronic tobacco evaporator, in order to prevent the generation of short circuit phenomenon, insulating barrier is provided with between metal tube and heat generating core, cause the programming rate in evaporation cavity slow, and cause unnecessary thermal loss; In addition, because the temperature of heater is higher, the heat-proof device complex structure of existing electronic tobacco evaporator, and effect of heat insulation is undesirable, easily causes the defect of the hand of scalding user.
Utility model content
The technical problems to be solved in the utility model is, slow and the electronic tobacco evaporator of above-mentioned heater programming rate for prior art easily scalds the defect of user, provides that a kind of thermal energy consumption is little, programming rate fast and the electronic tobacco evaporator of good heat-insulation effect.
The utility model solves the technical scheme that its technical problem adopts: provide a kind of electronic tobacco evaporator, comprise shell and be arranged on the vaporization chamber for containing being evaporated material in described shell, also comprise and be set in thermal conducting sleeve outside described vaporization chamber and heat generating core successively, and the region insulation that described heat generating core contacts with described thermal conducting sleeve; Described heat generating core is enclosed with heat insulation foam, the first thermal insulation layer and the second thermal insulation layer outward successively, has predetermined gap between described first thermal insulation layer and the second thermal insulation layer.
In electronic tobacco evaporator described in the utility model, described predetermined gap is between 0.1 millimeter-10 millimeters.
In electronic tobacco evaporator described in the utility model, described thermal conducting sleeve is alumina tube.
In electronic tobacco evaporator described in the utility model, described thermal conducting sleeve is metal tube, and outer surface one layer insulating contacted with described heat generating core on described metal tube.
In electronic tobacco evaporator described in the utility model, described insulating barrier is temperature-resistant insulation layer.
In electronic tobacco evaporator described in the utility model, the outer surface of described second thermal insulation layer is electroplate with the heat-reflecting layer for reflect heat being returned described vaporization chamber.
In electronic tobacco evaporator described in the utility model, also comprise the battery be arranged in described shell, described heat generating core is electrically connected with described battery.
In electronic tobacco evaporator described in the utility model, the sidewall that described vaporization chamber is overlapped by the collecting be set in described thermal conducting sleeve encloses and forms.
In electronic tobacco evaporator described in the utility model, described material to be evaporated is pipe tobacco, medicinal herbs or volatile materials.
The utility model additionally provides a kind of electronic tobacco evaporator, comprises shell, is fixed on the key switch on shell and is arranged on the suction nozzle of described shell one end;
Be formed with the first container cavity and the second container cavity that are set up in parallel in described shell, be arranged with pcb board in described first container cavity and be electrically connected to the battery on described pcb board;
Be formed with the vaporization chamber for containing being evaporated material in described second container cavity, described vaporization chamber is arranged with thermal conducting sleeve and heat generating core outward successively, and the region insulation that described heat generating core contacts with described thermal conducting sleeve; Described heat generating core is enclosed with heat insulation foam, the first thermal insulation layer and the second thermal insulation layer outward successively, and has predetermined gap between described first thermal insulation layer and the second thermal insulation layer, and described predetermined gap is between 0.1 millimeter-10 millimeters;
Described key switch is connected with described pcb board, and heat generating core is electrically connected with described pcb board, thus to control described battery by key switch be that described heat generating core is powered.
Implement electronic tobacco evaporator of the present utility model, there is following beneficial effect: by wrapping up heat insulation foam, the first thermal insulation layer and the second thermal insulation layer outward successively at heat generating core, and predetermined gap is set between the first thermal insulation layer and the second thermal insulation layer, thus carry out effectively heat insulation to the heat of heat generating core, reduce the temperature of shell, and make the temperature of shell remain on normal temperature, efficiently solve the shell when user sucks electronic tobacco evaporator hot and scald the problem of user, improve Consumer's Experience.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation of the electronic tobacco evaporator that the utility model preferred embodiment provides;
Fig. 2 is the sectional view of the electronic tobacco evaporator in Fig. 1;
Fig. 3 is the part explosive view of the electronic tobacco evaporator in Fig. 1.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe detailed description of the invention of the present utility model in detail.
As depicted in figs. 1 and 2, the electronic tobacco evaporator that the utility model provides comprises shell 1, vaporization chamber 2, thermal conducting sleeve 3, heat generating core 4, heat insulation foam 5, first thermal insulation layer 6, second thermal insulation layer 7, battery 8, collecting cover 10, suction nozzle 11, pcb board 12 and key switch 13.Wherein, vaporization chamber 2, thermal conducting sleeve 3, heat generating core 4, heat insulation foam 5, first thermal insulation layer 6, second thermal insulation layer 7, battery 8, collecting cover 10 and pcb board 12 are all arranged in shell 1, and key switch 13 is fixed on shell 1; Suction nozzle 11 is removably disposed in one end of shell 1, and communicates with vaporization chamber 2.Suction nozzle 11 is provided with smoking port 111, and particularly, this smoking port 111 communicates with vaporization chamber 2, thus makes user can suck from smoking port 111 evaporant produced in vaporization chamber 2.
The first container cavity (not marking) and the second container cavity (not marking) is formed in shell 1, first container cavity and the second container cavity are mutually set up in parallel and are isolated from each other, battery 8 and pcb board 12 are set in the first container cavity, and battery 8 is electrically connected with pcb board 2.Key switch 13 is fixed on the lateral wall of the first container cavity, and is connected with pcb board 12.
Vaporization chamber 2, thermal conducting sleeve 3, heat generating core 4, heat insulation foam 5, first thermal insulation layer 6, second thermal insulation layer 7 and collecting cover 10 are all housed in the second container cavity, thus battery 8 and vaporization chamber 2 are set up in parallel and are that vaporization chamber 2 is powered.Vaporization chamber 2 for containing being evaporated material, and communicates with the smoking port 111 of suction nozzle 11, and wherein, described material to be evaporated is pipe tobacco, medicinal herbs or volatile materials, and suction nozzle 11 is arranged on one end of the second container cavity.Vaporization chamber 2 is outer is arranged with thermal conducting sleeve 3 and heat generating core 4, the region insulation that heat generating core 4 contacts with thermal conducting sleeve 3 successively, and heat generating core 4 is electrically connected with battery 8, powers for heat generating core 4 to realize battery 8.Particularly, heat generating core 4 is also electrically connected with pcb board 12, thus control battery 8 by key switch 13 and power for heat generating core 4, namely when sucking this electronic tobacco evaporator, press of key switch 13 makes pcb board 12 receive triggering signal, then pcb board 12 makes battery 8 power for heat generating core 4 by controlling internal circuit, and then realizes the thing to be evaporated in evaporation vaporization chamber 2.In the present embodiment, vaporization chamber 2 is enclosed by the sidewall of collecting cover 10, and in thermal conducting sleeve 3, be namely also arranged with a collecting cover 10, material to be evaporated is housed in this collecting cover 10.Be appreciated that collecting cover 10 is made up of the metal material of good heat conductivity, as copper, aluminium etc., to make the heat of heat generating core 4 pass to material to be evaporated after thermal conducting sleeve 3 and collecting cover 10, thus heating materials to be evaporated evaporated.In other embodiments, vaporization chamber 2 may also be and enclosed by the sidewall of thermal conducting sleeve 3, and namely material to be evaporated is directly housed in thermal conducting sleeve 3.
The battery 8 of the present embodiment, pcb board 12 and heat generating core 4 form a current loop, are controlled the power supply of battery 8 pairs of heat generating cores 4 by pcb board 12.When heat generating core 4 is energized, heat on heat generating core 4 is directly passed in vaporization chamber 2 by thermal conducting sleeve 3, makes the temperature in vaporization chamber 2 increase rapidly, and the temperature in vaporization chamber 2 can be made in 30 seconds to rise to 200 °, effectively save output power, substantially increase programming rate.In the present embodiment, in order to avoid when being energized, heat generating core 4 and thermal conducting sleeve 3 directly contact and can cause heat generating core 4 short circuit, and this thermal conducting sleeve 3 is alumina tube, and namely thermal conducting sleeve 3 is made up of aluminium oxide.Aluminium oxide itself has excellent dielectricity and insulating properties, and therefore alumina tube itself has insulating properties, and namely alumina tube also can play the effect of insulating with heat generating core 4, is equivalent to insulating barrier; And the thermal conductivity factor of aluminium oxide is higher, the thermal conducting sleeve 3 adopting aluminium oxide to make also has good heat transfer property, and the heat of heat generating core 4 can be made to be passed in vaporization chamber 2 rapidly, improves the programming rate in vaporization chamber 2.Namely the thermal conducting sleeve 3 of the present embodiment has the effect of insulation and heat transfer simultaneously, thus makes heat generating core 4 directly heat is passed on thermal conducting sleeve 3, greatly improves the programming rate in vaporization chamber 2.
In another embodiment, thermal conducting sleeve 3 is metal tube, and outer surface one layer insulating contacted with heat generating core 4 on metal tube.Because the heat conductivility of metal is relatively good, therefore thermal conducting sleeve 3 adopts metal material to make, simultaneously in order to avoid being short-circuited between heat generating core 4 and thermal conducting sleeve 3, at the nonconducting insulating barrier of the outer surface of thermal conducting sleeve 3, preferably, this insulating barrier is temperature-resistant insulation layer, as temperature-resistant insulation layer can be made up of polytetrafluoroethylene (PTFE).When heat generating core 4 conducts electricity, the paint insulating barrier on thermal conducting sleeve 3 can play the effect of insulation isolation, thus avoids the phenomenon that to be short-circuited between heat generating core 4 and thermal conducting sleeve 3; Simultaneously owing to painting the thinner thickness of insulating barrier, heat can be passed to thermal conducting sleeve 3 by heat generating core 3 rapidly, greatly promotes the programming rate in vaporization chamber 2.Preferably, the thickness of paint insulating barrier is less than 0.05mm, rapidly the heat of heat generating core 4 is passed to thermal conducting sleeve 3, and promotes the temperature in vaporization chamber 2 rapidly, to reach the evaporating temperature of thing to be evaporated.
In other embodiments, insulating oxide is carried out, to prevent short circuit between heat generating core 4 and thermal conducting sleeve 3 in the region contacted also can wrapping up thermal conducting sleeve 3 at heat generating core 4.
As shown in Figure 3, heat generating core 4 is also provided with temperature probe 9, this temperature probe 9 is for measuring the temperature of heat generating core 4, and namely temperature probe 9 is connected directly between on heat generating core 4, with the temperature of Measurement accuracy heat generating core 4, avoids the temperature on heat generating core 4 too high.
Because the temperature of heat generating core 4 and vaporization chamber 2 is all higher, even up to 200-300 DEG C, in order to avoid the heat of heat generating core 4 and vaporization chamber 2 reaches on shell 1 and scalds user, heat insulation foam 5, first thermal insulation layer 6 and the second thermal insulation layer 7 is provided with for heat insulation between heat generating core 4 and shell 1, namely outside heat generating core 4, heat insulation foam 5, first thermal insulation layer 6 and the second thermal insulation layer 7 is enclosed with successively, thus reduce the temperature of shell 1, the temperature of shell 1 is made to be down to normal temperature, when user hold shell 1 suck electronic tobacco evaporator time, avoid scald user.
Heat insulation foam 5 is coated on the outer surface of heat generating core 4, and for the heat of isolation heat generating core 4, the material of heat insulation foam 5 is aluminosilicate fiber cotton or zirconium cellucotton.First thermal insulation layer 6 and the second thermal insulation layer 7 are coated on outside heat insulation foam 5 successively, with further heat insulation and heat control, thus the temperature of shell 1 are reduced; First thermal insulation layer 6 and the second thermal insulation layer 7 are made by plastic material, its good heat-insulation effect.In the present embodiment, the second thermal insulation layer 7 is roughly cylindrical shape, and the first thermal insulation layer 6 comprises the first heat dam 61 and the second heat dam 62, and the first heat dam 61 is identical with the physical dimension of the second heat dam 62, is roughly ship shape; The notch end face of the first heat dam 61 and the second heat dam 62 snaps together and forms the first cylindric thermal insulation layer 6.In other embodiments, the first thermal insulation layer 6 also can be directly cylindric.
Have predetermined gap between first thermal insulation layer 6 and the second thermal insulation layer 7, such heat can not be delivered to the second thermal insulation layer 7 from the first thermal insulation layer 6 at once, but just will can be delivered to the second thermal insulation layer 7 by the air in this gap.Due to the non-conductor that air is heat, contribute to reducing temperature further, avoid user to feel bright and scald.Particularly, the predetermined gap between this first thermal insulation layer 6 and second thermal insulation layer 7 between 0.1 millimeter-10 millimeters, effectively to carry out multilayer insulation.
In another embodiment, be electroplate with one deck heat-reflecting layer (not shown) at the outer surface of the second thermal insulation layer 7, this heat-reflecting layer is used for reflect heat to return in vaporization chamber 2, thus reduce further the temperature of shell 1.Heat-reflecting layer is arranged between the second thermal insulation layer 7 and shell 1, when the partial heat in heat generating core 4 and vaporization chamber 2 is passed to the second thermal insulation layer 7, heat can be launched back in vaporization chamber 2 by heat-reflecting layer, reduce the transmission of heat to shell 1, under the prerequisite ensureing temperature in vaporization chamber 2, reduce the temperature of shell 1, avoid and scald user, and decrease energy loss.In the present embodiment, heat-reflecting layer adopts tinfoil paper, aluminium foil is made.
Electronic tobacco evaporator of the present utility model, by wrapping up heat insulation foam 5, first thermal insulation layer 6 and the second thermal insulation layer 7 successively outside heat generating core 4, and predetermined gap is set between the first thermal insulation layer 6 and the second thermal insulation layer 7, thus carry out effectively heat insulation to the heat of heat generating core 4, reduce the temperature of shell 1, and make the temperature of shell 1 remain on normal temperature, efficiently solve the shell 1 when user sucks electronic tobacco evaporator hot and scald the problem of user, improve Consumer's Experience.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, also can make a lot of form, these all belong within protection of the present utility model.
Claims (10)
1. an electronic tobacco evaporator, comprise shell (1) and be arranged on the vaporization chamber for containing being evaporated material (2) in described shell (1), it is characterized in that, also comprise and be set in described vaporization chamber (2) thermal conducting sleeve outward (3) and heat generating core (4) successively, and the region insulation that described heat generating core (4) contacts with described thermal conducting sleeve (3); Described heat generating core (4) is enclosed with heat insulation foam (5), the first thermal insulation layer (6) and the second thermal insulation layer (7) outward successively, has predetermined gap between described first thermal insulation layer (6) and the second thermal insulation layer (7).
2. electronic tobacco evaporator according to claim 1, is characterized in that, described predetermined gap is between 0.1 millimeter-10 millimeters.
3. electronic tobacco evaporator according to claim 1, is characterized in that, described thermal conducting sleeve (3) is alumina tube.
4. electronic tobacco evaporator according to claim 1, is characterized in that, described thermal conducting sleeve (3) is metal tube, and outer surface one layer insulating contacted with described heat generating core (4) on described metal tube.
5. electronic tobacco evaporator according to claim 4, is characterized in that, described insulating barrier is temperature-resistant insulation layer.
6. electronic tobacco evaporator according to claim 1, is characterized in that, the outer surface of described second thermal insulation layer (7) is electroplate with the heat-reflecting layer for reflect heat being gone back to described vaporization chamber (2).
7. electronic tobacco evaporator according to claim 1, is characterized in that, also comprise the battery (8) be arranged in described shell (1), described heat generating core (4) is electrically connected with described battery (8).
8. electronic tobacco evaporator according to claim 1, is characterized in that, described vaporization chamber (2) is enclosed by the sidewall of the collecting cover (10) be set in described thermal conducting sleeve (3) and forms.
9. electronic tobacco evaporator according to claim 1, is characterized in that, described material to be evaporated is pipe tobacco, medicinal herbs or volatile materials.
10. an electronic tobacco evaporator, is characterized in that, comprises shell (1), is fixed on the key switch (13) on shell (1) and is arranged on the suction nozzle (11) of described shell (1) one end;
Be formed with the first container cavity be set up in parallel and the second container cavity in described shell (1), be arranged with pcb board (12) in described first container cavity and be electrically connected to the battery (8) on described pcb board (12);
The vaporization chamber (2) for containing being evaporated material is formed in described second container cavity, described vaporization chamber (2) is arranged with thermal conducting sleeve (3) and heat generating core (4) outward successively, and the region insulation that described heat generating core (4) contacts with described thermal conducting sleeve (3); Described heat generating core (4) is enclosed with heat insulation foam (5), the first thermal insulation layer (6) and the second thermal insulation layer (7) outward successively, and between described first thermal insulation layer (6) and the second thermal insulation layer (7), there is predetermined gap, described predetermined gap is between 0.1 millimeter-10 millimeters;
Described key switch (13) is connected with described pcb board (12), heat generating core (4) is electrically connected with described pcb board (12), thus controls described battery (8) for described heat generating core (4) power supply by key switch (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420390663.4U CN204120226U (en) | 2014-07-15 | 2014-07-15 | Electronic tobacco evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420390663.4U CN204120226U (en) | 2014-07-15 | 2014-07-15 | Electronic tobacco evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204120226U true CN204120226U (en) | 2015-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420390663.4U Active CN204120226U (en) | 2014-07-15 | 2014-07-15 | Electronic tobacco evaporator |
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| CN (1) | CN204120226U (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105167199A (en) * | 2015-07-28 | 2015-12-23 | 深圳市施美乐科技股份有限公司 | Mixed double-passage tobacco evaporator |
| CN107183789A (en) * | 2017-07-21 | 2017-09-22 | 上海烟草集团有限责任公司 | Electro-heat equipment, heating are not burnt smoking set and constant temperature flue gas method for releasing |
| CN107432499A (en) * | 2017-08-15 | 2017-12-05 | 深圳市博迪科技开发有限公司 | Electronic smoke atomizer and electronic cigarette with tobacco tar pre-add hot function |
| CN107536113A (en) * | 2017-09-05 | 2018-01-05 | 惠州市新泓威科技有限公司 | Heat fire-retardant type electronic smoking set |
| CN109074123A (en) * | 2016-07-22 | 2018-12-21 | 惠普发展公司，有限责任合伙企业 | Calculate the shell of equipment |
| CN109275962A (en) * | 2018-12-07 | 2019-01-29 | 苏州晶品新材料股份有限公司 | A kind of heating component and electronic cigarette for smoke generating device |
| WO2019196580A1 (en) * | 2018-04-10 | 2019-10-17 | 惠州市新泓威科技有限公司 | Heating device for heat-type electronic cigarette |
| WO2019200957A1 (en) * | 2018-04-16 | 2019-10-24 | 深圳瀚星翔科技有限公司 | Electronic heating apparatus |
| CN110584216A (en) * | 2019-09-27 | 2019-12-20 | 深圳麦时科技有限公司 | Tobacco baking tool |
| WO2020011044A1 (en) * | 2018-07-09 | 2020-01-16 | 常州市派腾电子技术服务有限公司 | Battery device and electronic cigarette |
| WO2020227951A1 (en) * | 2019-05-15 | 2020-11-19 | 胡伟华 | Tobacco evaporator and heating control method |
| EP3794984A1 (en) * | 2019-09-20 | 2021-03-24 | Nerudia Limited | Smoking substitute apparatus |
| CN112839535A (en) * | 2018-10-12 | 2021-05-25 | Jt国际股份公司 | Aerosol generating device and heating cavity thereof |
| US11178910B2 (en) | 2017-05-11 | 2021-11-23 | Kt&G Corporation | Vaporizer and aerosol generation device including same |
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| EP3871535A4 (en) * | 2018-10-26 | 2022-06-08 | Japan Tobacco Inc. | Heating assembly and flavor inhaler provided with same |
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| WO2020011044A1 (en) * | 2018-07-09 | 2020-01-16 | 常州市派腾电子技术服务有限公司 | Battery device and electronic cigarette |
| CN112839535A (en) * | 2018-10-12 | 2021-05-25 | Jt国际股份公司 | Aerosol generating device and heating cavity thereof |
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| CN109275962A (en) * | 2018-12-07 | 2019-01-29 | 苏州晶品新材料股份有限公司 | A kind of heating component and electronic cigarette for smoke generating device |
| WO2020227951A1 (en) * | 2019-05-15 | 2020-11-19 | 胡伟华 | Tobacco evaporator and heating control method |
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