WO2020121374A1

WO2020121374A1 - Non-combustible heating-type smoking device

Info

Publication number: WO2020121374A1
Application number: PCT/JP2018/045294
Authority: WO
Inventors: 宏海植松; 啓二山道; 尚弘時津; 仙道　誠; 哲也眞鍋
Original assignee: 日本たばこ産業株式会社
Priority date: 2018-12-10
Filing date: 2018-12-10
Publication date: 2020-06-18
Also published as: EP3895561C0; EP3895561B1; PL3895561T3; EP3895561A4; EP3895561A1; JPWO2020121374A1; CN113163869A; CN113163869B; JP7140841B2

Abstract

Provided is a non-combustible heating-type smoking device which can prevent condensation of aerosol generated by heating and deliver a sufficient amount of aerosol to a smoking person. This non-combustible heating-type smoking device is provided with: a receiving cavity for receiving a tobacco rod containing cut tobacco and an aerosol generating substrate; an internal heater which is placed within the receiving cavity, penetrates or is inserted into the tobacco rod inserted into the receiving cavity, and heats the tobacco rod from the inside to volatilize the aerosol generating substrate; and an external heater which is placed on a side peripheral part of the receiving cavity, and preheats the outer peripheral part of the tobacco rod during at least a tobacco rod preheating period to prevent condensation of aerosol generated during the operation of the internal heater.

Description

Non-combustion heating type smoking device

The present invention relates to a non-combustion heating type smoking device.

Known is a non-combustion heating type smoking device that delivers aerosols to smokers generated by heating a tobacco rod that contains chopped tobacco and aerosol-generating base materials (glycerin, propylene glycol, etc.) with a heater such as an electric heater. (For example, refer to Patent Document 1).

In non-combustion heating type smoking devices, it has been conventionally desired to increase the amount of aerosol generation (delivery amount) to enhance the feeling of smoke volume. For that purpose, it is important to deliver the aerosol generated by heating the aerosol-generating substrate to the mouthpiece without waste.

Japanese Patent No. 6026556 Special Table 2014-525251 Publication Japanese Patent Publication No. 2013-511962

However, in the conventional non-combustion heating type smoking device, a portion having a low product temperature is likely to exist at the time of heating the tobacco rod, and the aerosol-generating base material once volatilized is cooled by the portion having a low product temperature. It might have condensed. As a result, there is a risk that a sufficient amount of aerosol cannot be delivered to the smoker, and the smoke amount is reduced. The present invention has been made in view of the above circumstances, the object is to suppress the condensation of the aerosol generated by heating, it is possible to deliver a sufficient amount of aerosol to smokers non-combustion It is to provide a heating type smoking device.

A non-combustion heating type smoking device according to the present invention for solving the above-mentioned problems, a housing cavity for housing a tobacco rod containing a tobacco cut and an aerosol-generating substrate, and the housing cavity arranged in the housing cavity, An internal heater for penetrating into a tobacco rod inserted in or inserted into a recess formed in the end surface of the tobacco rod, for volatilizing the aerosol-generating substrate by heating the tobacco rod from the inside. An inner heater and a side peripheral portion of the accommodating cavity are provided, and at least the outer peripheral portion of the tobacco rod is preheated during the preheating period of the tobacco rod to suppress condensation of aerosol generated when the inner heater is operated. And an external heater.

In addition, the controller includes a controller that controls the internal heater and the external heater, and the controller controls the temperature of the external heater to be the temperature of the internal heater during a simultaneous heating period in which both the internal heater and the external heater operate. You may control so that it may become higher.

In addition, the control unit, when the elapsed time from the preheating start of the tobacco rod by the external heater reaches a predetermined set time, or when the temperature of the external heater reaches a predetermined set temperature, Although the operation is stopped, the operation of the internal heater may be continued.

The control unit may increase the temperature of the internal heater after the operation of the external heater is stopped compared to before the operation of the external heater is stopped.

The control unit may start the preheating by operating only the external heater when starting the preheating of the tobacco rod, and may operate the internal heater after the operation of the external heater.

Further, the accommodating cavity is located at a tip end side of the side peripheral portion and has an insertion opening that is an open end that is opened so that the tobacco rod can be inserted, and a cavity bottom portion that is located at a proximal end side of the side peripheral portion. And the side peripheral portion has a first region including a base end on which the cavity bottom is provided, and a second region adjacent to the first region and located on the insertion opening side, The external heater may not be arranged in the first region and may be arranged in the second region.

The external heater may be arranged over the entire circumference along the circumferential direction of the side circumferential part in a part or the whole section of the second region.

Also, the internal heater may have n-fold symmetry with respect to the central axis of the accommodation cavity, and n may be an integer of 3 or more.

Also, the internal heater may have a columnar shape, and a conical portion may be formed on the tip side.

Further, the internal heater may have a truncated cone shape or a truncated cone shape, and may be tapered from the cavity bottom side toward the insertion port side.

The internal heater may have a conical shape or a truncated cone shape.

The side peripheral portion may further have a third region adjacent to the second region and including the insertion port, and the external heater may not be arranged in the third region.

The tip position of the internal heater may be associated with the second region or the third region of the side peripheral portion.

The means for solving the problems in the present invention can be adopted in combination as much as possible.

According to the present invention, it is possible to provide a non-combustion heating type smoking device capable of suppressing condensation of aerosol generated by heating and delivering a sufficient amount of aerosol to a smoker.

FIG. 1 is a diagram schematically showing the internal structure of the non-combustion heating type smoking device according to the first embodiment. FIG. 2 is a schematic configuration diagram of a non-combustion heating type smoking article used in the non-combustion heating type smoking device. FIG. 3 is a schematic view of a vertical cross section of the heater. FIG. 4 is a perspective view showing a schematic structure of the heater. FIG. 5: is a figure which shows the state which inserted the tobacco rod of the non-combustion heating type smoking article into the accommodation cavity from the insertion port in a heater. FIG. 6: is a figure which shows the state which inserted the tobacco rod of the non-combustion heating type smoking article into the accommodation cavity from the insertion port in a heater. FIG. 7 is a time chart showing the operating states of the external heater and the internal heater during heating control. FIG. 8 is a diagram for explaining changes in the surface temperature of the external heater and the internal heater during heating control. FIG. 9: is a figure which shows the result of a temperature measurement test. FIG. 10: is a figure which shows the result of a temperature measurement test. FIG. 11: is a figure which shows the result of a temperature measurement test. FIG. 12: is a figure which shows the result of a temperature measurement test. FIG. 13 is a diagram showing the product temperature measurement position of the tobacco rod. FIG. 14: is a figure which shows the modification of the internal heater in a heater. FIG. 15: is a figure which shows the modification of the internal heater in a heater. FIG. 16: is a figure which shows the modification of the internal heater in a heater.

Here, an embodiment of the non-combustion heating type smoking device according to the present invention will be described with reference to the drawings. Note that the dimensions, materials, shapes, relative positions, and the like of the constituent elements described in the present embodiment are not intended to limit the technical scope of the invention to only those unless otherwise specified. Absent.

<Embodiment 1>
FIG. 1 is a diagram schematically showing an internal structure of a non-combustion heating type smoking device 1 according to the first embodiment. The non-combustion heating type smoking device 1 has a housing 2 which is a housing for housing various components. A heater 3, a controller (control unit) 4, a power supply 5 and the like are housed in the housing 2.

FIG. 2 is a schematic configuration diagram of a non-combustion heating smoking article 10 used in the non-combustion heating smoking device 1. The non-combustion heating type smoking article 10 has a tobacco rod 11 and a mouthpiece portion 12. Hereinafter, the end of the non-combustion heating type smoking article 10 on the side of the tobacco rod 11 is referred to as a tip, and the end of the mouthpiece portion 12 is referred to as a base end. The tobacco rod 11 is composed of a filler 111 including a tobacco cut and an aerosol-generating base material, and a wrapping paper 112 around which the filler 111 is wound. The material for cutting the tobacco is not particularly limited, but known materials such as lamina and mid-bone can be used. The filling material 111 includes an aerosol-generating base material that generates an aerosol. The type of aerosol-forming base material is not particularly limited, and various substances extracted from natural products can be appropriately selected depending on the application. Examples of the aerosol-forming base material include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof. As the filler 111 containing the chopped tobacco and the aerosol-forming base material, homogenized tobacco such as tobacco fine powder, and as a binder, a gelling agent, a cross-linking agent, a fragrance, a hydrophilic fragrance, a lipophilic fragrance, and a viscosity adjustment are added. Reconstituted tobacco raw material obtained by liquid/gel/sol or a slurry that is a soft solid obtained by kneading a moisturizer/reinforcing agent or the like, and then drying, dehydration, papermaking, or extrusion molding, for example, Examples include sheet tobacco, cut tobacco sheets, and tobacco granules. Further, the filling material 111 may include a fragrance. The type of fragrance is not particularly limited.

The mouthpiece part 12 includes, for example, a filter segment or the like in which cylindrical cellulose acetate is wrapped with a roll of paper, and filters part of the aerosol generated by the tobacco rod 11 during smoking. Of course, the mouthpiece portion 12 may include a segment other than the filter segment. The tobacco rod 11 and the mouthpiece portion 12 are connected to each other by being integrally wound by a tip paper 13.

FIG. 3 is a schematic view of a vertical cross section of the heater 3. Specifically, FIG. 3 shows a sectional structure of the heater 3 taken along the line AA in FIG. FIG. 4 is a perspective view showing a schematic structure of the heater 3.

The heater 3 has a heater housing 31 having a bottomed cylindrical shape. The heater housing 31 has a disk-shaped bottom portion 311 and a cylindrical outer cylinder wall 312 rising from the bottom portion 311. The opening end of the outer cylinder wall 312 of the heater housing 31 is open toward the outside of the housing 2 through an opening provided in the housing 2, and is a column into which the tobacco rod 11 of the non-combustion heating type smoking article 10 can be inserted. An accommodation cavity 34, which is a hollow shape, is formed.

Here, a thick portion 313 having a smaller inner diameter by one step than other portions is formed on the tip side of the outer cylinder wall 312 of the heater housing 31. The front end of the outer cylinder wall 312 here refers to the end of the outer cylinder wall 312 opposite to the base end connected to the bottom portion 311. Further, a cavity side peripheral wall 32 having a cylindrical shape is provided inside the outer cylindrical wall 312 of the heater housing 31. The outer diameter of the cavity side peripheral wall 32 is equal to the inner diameter of the thick portion 313 of the outer cylindrical wall 312. Further, as shown in FIG. 3, an annular and hollow air heat insulating portion 37 is formed between the inner surface of the outer cylindrical wall 312 of the heater housing 31 and the outer peripheral surface 32b of the cavity side peripheral wall 32. Further, at the tip of the cavity side peripheral wall 32, an insertion opening 38 is formed which is opened so that the tobacco rod 11 can be inserted. The end of the cavity side peripheral wall 32 opposite to the tip side where the insertion port 38 is formed is referred to as a base end 32c.

A heat resistant cup 33 having a bottomed cylindrical shape is provided on the bottom 311 side of the heater housing 31. The heat-resistant cup 33 is made of a heat-resistant material such as aluminum, and has a disk-shaped cavity bottom 331 and a cavity-side peripheral wall 332 rising from the cavity bottom 331. The cavity bottom portion 331 of the heat-resistant cup 33 is arranged in a state of being stacked inside the bottom portion 311 of the heater housing 31, and forms the cavity bottom portion of the accommodation cavity 34. Further, the cavity side peripheral wall 32 and the cavity side peripheral wall 332 form a side peripheral portion of the accommodation cavity 34.

As shown in FIGS. 3 and 4, in the heater 3, the heat-resistant cup 33 and the cavity-side peripheral wall 32 form an accommodation cavity 34 that is a cavity for accommodating the tobacco rod 11. Further, as shown in FIGS. 3 and 4, an annular external heater 35 is provided on the cavity side peripheral wall 32 so as to face the accommodation cavity 34. The external heater 35 is housed in the concave portion of the cavity side peripheral wall 32 so as to be flush with the inner peripheral surface 32 a of the cavity side peripheral wall 32. Here, the reference numeral 35 a is a heating surface facing the accommodation cavity 34. The ring-shaped external heater 35 is arranged along the entire inner circumference of the cavity-side peripheral wall 32 along the inner peripheral surface 32a. In other words, the external heater 35 is arranged along the circumferential direction of the accommodation cavity 34 over the entire circumference of the side peripheral portion. The reference numeral CL1 shown in FIG. 3 is the central axis of the heater housing 31. The central axis CL1 is also the central axis of the accommodation cavity 34 and the cavity side peripheral wall 32 at the same time.

Further, as shown in FIGS. 3 and 4, an internal heater 36 is provided in the accommodation cavity 34. The internal heater 36 has a truncated cone shape, and is vertically provided from the central portion of the bottom portion 311 of the heater housing 31 toward the accommodation cavity 34 side. A through hole 33a is formed in the center of the cavity bottom portion 331 of the heat resistant cup 33, and the internal heater 36 projects from the cavity bottom portion 331 to the accommodation cavity 34 side by inserting the through hole 33a. The central axis of the internal heater 36 is coaxial with the central axis CL of the heater housing 31 (accommodation cavity 34). Reference numeral 36a is a base end portion of the internal heater 36, and reference numeral 36b is a front end portion of the internal heater 36. The internal heater 36 extends from the cavity bottom portion 331 toward the insertion opening 38, and is gradually tapered from the base end portion 36a to the tip end portion 36b. The types of the internal heater 36 and the external heater 35 are not particularly limited, but, for example, a steel material having heating wires (for example, nichrome, iron chrome, iron nickel, etc.) stretched around, a ceramic heater, or a sheath heater ( Sheathed Heater) can be used. The sheathed heater is a heater in which heat rays are covered with a filler and a metal pipe.

Further, in the present embodiment, the cavity side peripheral wall 32 is formed of a known heat insulating and heat resistant material so as to withstand the heat of the external heater 35 and prevent the heat of the external heater 35 from diffusing. Examples of the material used for the cavity-side peripheral wall 32 having such heat insulation performance and heat resistance performance include ceramics of alumina/silica, PEEK (polyether ether ketone), PPS (polyphenylene sulfide), and PTFE (polytetrahydrofuran) having high heat resistance. Examples thereof include resins such as fluoroethylene).

In the present embodiment, the inner peripheral surface 32a of the cavity side peripheral wall 32, the inner peripheral surface 332a of the cavity side peripheral wall 332 of the heat resistant cup 33, and the heating surface 35a of the external heater 35 are flush with each other. Therefore, the inner diameter of the accommodation cavity 34 is constant along the central axis CL1 direction. In the present embodiment, the inner diameter of the storage cavity 34 may be equal to the outer diameter of the tobacco rod 11, or may be slightly larger than the outer diameter of the tobacco rod 11.

Here, R1 to R3 shown in FIG. 3 are the first to third regions in the cavity side peripheral wall 32 (side peripheral portion). The first region R1 of the cavity side peripheral wall 32 is a region including the base end 32c where the cavity bottom 331 is provided. The second region R2 of the cavity side peripheral wall 32 is a region located adjacent to the first region R1 on the insertion port 38 side, and is a region where the external heater 35 is arranged in a part or all of the region. is there. That is, the second region R2 has a meaning as a region that defines the maximum range in which the external heater 35 is formed, and the external heater 35 is arranged in the entire region or a partial region of the second region R2. . The third region R3 of the cavity side peripheral wall 32 is a region adjacent to the second region and including the insertion port 38. Here, the first region R1 to the third region R3 are regions formed along the central axis CL1 of the accommodating cavity 34, and are the first region R1 and the second region R2 from the cavity bottom 331 toward the insertion opening 38. , And the third region R3 in this order. The length in the central axis CL1 direction in each of the first region R1 to the third region R3 can be changed as appropriate. As shown in FIG. 3, on the cavity side peripheral wall 32, the external heater 35 is arranged only in the second region R2, and the external heater 35 is not arranged in the first region R1 and the third region R3. Further, in the example shown in FIG. 3, the external heater 35 is arranged in the entire section of the second region R2 on the cavity side peripheral wall 32, but the external heater 35 is provided only in a part of the second region R2. You may.

FIGS. 5 and 6 are views showing a state in which the tobacco rod 11 of the non-combustion heating type smoking article 10 is inserted into the accommodation cavity 34 through the insertion opening 38 of the heater 3. When the tobacco rod 11 (filler 111) is inserted into the storage cavity 34, the internal heater 36 of the heater 3 in the present embodiment has a truncated cone shape and is tapered toward the tip 36b. The inner heater 36 can easily penetrate the tobacco rod 11 (filler 111). In the present embodiment, when the tip surface 11a of the tobacco rod 11 (see FIG. 2) comes into contact with the bottom of the storage cavity 34, that is, the cavity bottom 331 of the heat-resistant cup 33, the tobacco into the storage cavity 34 is cut. The insertion of the rod 11 is completed. As shown in FIG. 5, when the insertion of the tobacco rod 11 into the storage cavity 34 is completed, the rear end portion 11b of the tobacco rod 11 is positioned corresponding to the third region R3 of the cavity side peripheral wall 32 described above. . The reference numeral P1 shown in FIG. 3 indicates a position corresponding to the rear end portion 11b of the tobacco rod 11 in a state where the insertion of the tobacco rod 11 into the storage cavity 34 is completed (hereinafter, referred to as "housing rear end position during storage"). Showing. In the present embodiment, the distance between the rod rear end position P1 during accommodation and the external heater 35 is set to a relatively small size of about 1 mm.

The heater 3 having the above-described structure includes an external heater 35 arranged on a side peripheral portion of the accommodation cavity 34, and an internal heater 36 arranged along the central axis CL1 on the center side of the cross section of the accommodation cavity 34. The external heater 35 and the internal heater 36 in the heater 3 generate heat when power is supplied from the power source 5. The power source 5 is not particularly limited, but may be, for example, a rechargeable lithium-ion battery. Further, although the connection between the external heater 35 and the internal heater 36 in the heater 3 and the power source 5 is not shown in FIG. 1, the external heater 35 and the internal heater 36 are connected to the power source, respectively. Further, the controller 4 is electrically connected to the power supply 5, and the controller 4 controls the power supply from the power supply 5 to the external heater 35 and the internal heater 36. The non-combustion heating type smoking apparatus 1 is provided with a user interface (not shown) (eg, operation buttons) operated by a user (smoker), and the controller 4 is electrically connected to the user interface. .. The controller 4 controls the operation of the heater 3 (external heater 35 and internal heater 36) by detecting the operation of the user interface by the user. Hereinafter, control of the external heater 35 and the internal heater 36 by the controller 4 in the non-combustion heating type smoking device 1 will be described.

For example, when the user performs a predetermined ON operation on the operation button of the non-combustion heating type smoking device 1 from the state where the power of the non-combustion heating type smoking device 1 is turned off, the controller 4 causes the power source 5 to turn on the heater. 3, electric power supply is started, and heating control is performed to heat the tobacco rod 11 stored in the storage cavity 34 of the heater 3 as shown in FIG. FIG. 7 is a time chart showing the operating states of the external heater 35 and the internal heater 36 during the heating control of the heater 3 executed by the controller 4. FIG. 8 is a diagram for explaining changes in the surface temperature of the external heater 35 and the internal heater 36 during heating control.

In FIG. 7, time T0 represents the timing at which the controller 4 detects the ON operation of the operation button of the non-combustion heating type smoking device 1 (hereinafter, referred to as “heating start timing”). As shown in FIG. 7, at the heater start timing, the controller 4 starts power supply from the power source 5 only to the external heater 35.
Then, at time T1, the controller 4 starts the power supply from the power source 5 to the internal heater 36 while continuing the power supply from the power source 5 to the external heater 35. Hereinafter, the time T1 is referred to as "internal heating start timing". Then, at time T2, the controller 4 stops the power supply from the power source 5 to the external heater 35 while continuing the power supply from the power source 5 to the internal heater 36. Hereinafter, the time T2 is referred to as "external heating stop timing". Then, at a time T3 when a predetermined smoking time has elapsed from the time T0 (heating start timing), the power supply from the power source 5 to the internal heater 36 is stopped. Hereinafter, the time T3 is referred to as "heating stop timing".

As described above, the non-combustion heating type smoking device 1 in the present embodiment preheats the tobacco rod 11 (initial heating) by operating only the external heater 35 at the heating start timing when heating of the tobacco rod 11 is started. Here, since the external heater 35 is provided along the cavity side peripheral wall 32 located on the outer peripheral portion (side surface) of the accommodation cavity 34, the outer peripheral portion of the tobacco rod 11 accommodated in the accommodation cavity 34 is efficiently disposed. Can be heated to. That is, the heating of the tobacco rod 11 by the internal heater 36 at time T1 (internal heating start timing) can be efficiently preheated, particularly the outer peripheral portion of the tobacco rod 11. Here, a period from time T0 (heating start timing) to time T1 (internal heater start timing) is referred to as a “preheating period”. The preheating period can be set as the time when the elapsed time has reached a predetermined set time from the heating start timing (that is, preheat start) or the temperature of the external heater 35 has reached the predetermined set temperature. For example, in the preheating period, the controller 4 may set the set temperature for controlling the external heater 35 to 300°C.

Then, the time elapsed from the heating start timing reaches a predetermined set time, or the temperature of the external heater 35 reaches a predetermined set temperature, that is, time T1 (internal heating start timing) to time T2 (external heating stop). During the period up to the timing (hereinafter referred to as “simultaneous heating period”), the tobacco rod 11 is heated by both the external heater 35 and the internal heater 36. As described above, the internal heater 36 is arranged coaxially with the central axis CL1 of the housing cavity 34. Therefore, the heat of the internal heater 36 penetrating the tobacco rod 11 (filler 111) is radially transferred from the center side of the tobacco rod 11 toward the outer peripheral side. As a result, the tobacco rod 11 can be efficiently heated, the aerosol-generating base material (eg, glycerin, etc.) contained in the filler 111 of the tobacco rod 11 and the flavor component contained in the tobacco cut are volatilized in a short time, An aerosol can be generated that includes a flavor component.

Note that the filling material 111 of the tobacco rod 11 including the aerosol-forming base material (eg, glycerin) first evaporates the water (moisture) in the filling material 111 as the product temperature rises. This evaporation occurs near the boiling point of water (100°C). Then, when the product temperature of the filler 111 in the tobacco rod 11 further rises, nicotine having an atmospheric pressure boiling point of about 250° C. then begins to volatilize, and when the product temperature further increases, glycerin having an atmospheric pressure boiling point of 290° C. evaporates, It is considered that smoke will be absorbed as an aerosol. As will be apparent to those skilled in the art, a wide variety of components are contained in a tobacco raw material, and since these components exist as compounds, they are close to the boiling points of pure substances such as water, nicotine and glycerin described above. Although a simple evaporation phenomenon does not occur only by itself, it is scientifically considered that the main components evaporate (volatilize) in the order of boiling points.

Here, as shown in FIG. 8, in the simultaneous heating period (time T1 to T2), the controller 4 controls the temperature of the external heater 35 to be higher than the temperature of the internal heater 36. For example, in the simultaneous heating period, the controller 4 controls the external heater 35 and the internal heater 36 by setting the set temperature of the external heater 35 to 300° C. and the set temperature of the internal heater 36 to 250° C. In the present embodiment, during the preheating period of the tobacco rod 11, the outer peripheral portion of the tobacco rod 11 is rapidly and efficiently heated by the external heater 35 that is in contact with or close to the outer peripheral portion, and even during the subsequent simultaneous heating period. The temperature of the heater 35 is controlled to be higher than that of the internal heater 36. As a result, the distance from the internal heater 36 makes it difficult for the heat of the internal heater 36 to reach, and the outer peripheral portion of the tobacco rod 11 can be positively heated due to the influence of the outside air (heat dissipation loss). .. That is, the center side of the cross section of the tobacco rod 11 is efficiently heated by the internal heater 36, the heat of the internal heater 36 is hard to be transferred, and the outer peripheral portion of the tobacco rod 11 is easily affected by the outside air (heat dissipation loss). Can be heated efficiently. As a result, the entire tobacco rod 11 can be uniformly heated to a temperature at which the aerosol-generating substrate is sufficiently volatilized.

Further, in the preheating period, the tobacco rod 11 is heated only by the external heater 35, and the internal heater 36 is operated after the preheating period elapses after the operation of the external heater 35, so that the external heater 35 and the internal heater 36 are operated in the preheating period. It is possible to reduce the total power consumption as compared with the case where both of them are operated.

Further, by positively heating the outer peripheral portion of the tobacco rod 11 by the external heater 35 during the preheating period and the simultaneous heating period as described above, the aerosol-generating base material that has once volatilized is condensed (condensation) on the outer peripheral portion of the tobacco rod 11. /Liquefaction) can be suppressed. Therefore, in particular, the delivery amount of the aerosol at the time of initial smoking can be sufficiently secured, and the feeling of smoke amount can be improved.

In particular, according to the non-combustion heating type smoking device 1 in the present embodiment, as shown in FIG. 5, the external heater 35 includes the external end of the tobacco rod 11 housed in the housing cavity 34 (on the mouthpiece portion 12 side). ) Is located. Therefore, of the outer peripheral portion of the tobacco rod 11, particularly the region on the base end side can be intensively heated by the external heater 35. According to this, there is an advantage that the aerosol generated on the tip side (upstream side) of the tobacco rod 11 can be effectively suppressed from condensing on the base end side (downstream side) of the tobacco rod 11.

Here, the external heater width dimension, which is the length of the external heater 35 extending along the central axis CL1 direction of the accommodation cavity 34, is preferably at least one third or more of the tobacco rod 11. According to this, prior to the start of heating by the internal heater 36, the outer peripheral portion of the tobacco rod 11 can be sufficiently preheated during the preheating period of the tobacco rod 11.

After the entire temperature of the tobacco rod 11 is sufficiently increased in the simultaneous heating period as described above, the temperature of the tobacco rod 11 can be maintained at a temperature at which the aerosol does not condense only by heating by the internal heater 36, and thus the external heating is performed. When the stop timing (time T2) is reached, the controller 4 stops the operation of the external heater 35. At that time, the controller 4 stops the operation of the external heater 35 before the temperature of the internal heater 36 exceeds the temperature of the external heater 35. The external heating stop timing (time T2) for stopping the operation of the external heater 35 reaches a predetermined set time from the heating start timing (that is, preheating start), or the external heater 35 temperature is It can be set as the time when the predetermined set temperature is reached. Alternatively, the operation of the external heater 35 may be stopped when a certain time has elapsed since the temperature of the external heater 35 reached a predetermined set temperature, and various modes can be adopted. ..

After the external heating stop timing (time T2) has elapsed, since the tobacco rod 11 is heated only by the internal heater 36, the temperature of the external heater 35 naturally drops. Therefore, as shown in FIG. 8, during the period from the external heating stop timing (time T2) to the heating stop timing (time T3) (hereinafter, referred to as “internal heating period”), the temperature of the internal heater 36 changes to the external heater 35. Will be exceeded.

Here, the internal heater 36 arranged in the central portion is superior to the external heater 35 arranged on the outer peripheral side of the accommodation cavity 34 in heating efficiency when heating the tobacco rod 11. Therefore, the tobacco rod 11 is heated only by the internal heater 36 having excellent heating efficiency during the rest of the smoking period when the conditions in which the condensation of the aerosol is unlikely to occur are sufficiently raised by sufficiently heating the entire tobacco rod 11 in the simultaneous heating period. By doing so, the aerosol can be generated stably and continuously.

Further, the controller 4 may control the power supply from the power source 5 to the internal heater 36 after the operation of the external heater 35 is stopped so that the temperature of the internal heater 36 is increased as compared to before the operation of the external heater 35 is stopped. .. For example, the controller 4 may change the set temperature of the internal heater 36 from 250°C to 350°C. The set temperature of the internal heater 36 during the internal heating period may be set to an appropriate temperature at which the aerosol-generating substrate contained in the tobacco rod 11 can be volatilized stably and continuously by heating only the internal heater 36. preferable. As described above, when the set temperature of the internal heater 36 is raised after the operation of the external heater 35 is stopped, the power consumption of the internal heater 36 increases, but the operation of the external heater 35 is stopped. It is possible to reduce the total power consumption.

Then, at the time T3 (heating stop timing) when the predetermined smoking time has elapsed from the heating start timing (time T0), the controller 4 stops the power supply from the power source 5 to the internal heater 36.

9 to 12 show the results of the temperature measurement test in which changes in the surface temperature of the external heater 35, the surface temperature of the internal heater 36, and the product temperature of the tobacco rod 11 were measured when the heating control of the heater 3 was performed by the controller 4. FIG. FIG. 13 is a diagram showing the product temperature measurement position of the tobacco rod 11.

In the temperature measurement test, the temperature of the tobacco rod 11 was measured from the first measurement position MP1 to the third measurement position MP3 shown in FIG. The distance from the measurement positions MP1 to MP3 in the radial direction of the accommodation cavity 34 to the side peripheral surface of the accommodation cavity 34 (the inner peripheral surface 32a of the cavity side peripheral wall 32) was set to 1.5 mm. The distance between the measurement positions MP1 to MP3 in the radial direction of the housing cavity 34 and the base end portion 36a of the internal heater 36 was set to 1.5 mm.

Further, as shown in FIG. 13, the first measurement position MP1 to the third measurement position MP3 are arranged in order of the first measurement position MP1, the second measurement position MP2, and the third measurement position MP3 from the cavity bottom 331 side. In the central axis CL1 direction of the accommodation cavity 34, the space between the cavity bottom 331 and the first measurement position MP1 was set to 2 mm. The distance between the first measurement position MP1 and the second measurement position MP2 was set to 5 mm. The distance between the second measurement position MP2 and the third measurement position MP3 was 6 mm. The distance between the third measurement position MP3 and the retracted rod rear end position P1 was set to 2 mm. In the heating control, the elapsed time from the heating start timing to the internal heater start timing is set to 6 seconds, the elapsed time from the heating start timing to the external heating stop timing is set to 20 seconds, and heating is stopped from the heating start timing. The elapsed time until the timing was set to 420 seconds.

Further, in FIGS. 10 to 12, the temperature transitions indicated by the solid lines are the temperature transitions at the respective measurement positions MP1 to MP3 when the heating control according to the present embodiment described in FIGS. (Referred to as "example"). The temperature change indicated by the broken line indicates the temperature change at each measurement position MP1 to MP3 (hereinafter referred to as “comparative example”) when the heating control is performed using only the internal heater 36 without using the external heater. There is. The two-dot chain line shown in FIGS. 10 to 12 is the target product temperature when heating the tobacco rod 11. The target product temperature is, for example, 150°C. As shown in FIG. 10 to FIG. 12, at the first measurement position MP1 and the second measurement position MP2 at the positions corresponding to the first region R1 on the cavity side peripheral wall 32, the example and the comparative example are compared during heating control. There was no significant difference between the two. Since the first measurement position MP1 and the second measurement position MP2 are both far from the external heater 35 and relatively close to the internal heater 36, it is considered that the influence of the external heater 35 was small. On the other hand, as shown in FIG. 12, at the third measurement position MP3, a remarkable difference appears between the example and the comparative example, and the example raises the target product temperature in a shorter time than the comparative example. It was possible to raise the temperature, and the superiority of the example to the comparative example could be confirmed.

As described above, according to the non-combustion heating type smoking device 1 in the present embodiment, the internal heater 36, which is disposed in the accommodation cavity 34 and volatilizes the aerosol-generating substrate by heating the tobacco rod 11 from the inside, is provided. And an external part for suppressing the condensation of aerosol generated during the operation of the internal heater 36, which is arranged on the side peripheral part of the storage cavity 34 and preheats at least the outer peripheral part of the tobacco rod 11 during the preheating period of the tobacco rod 11. And a heater 35. This makes it possible to sufficiently heat the outer peripheral portion of the tobacco rod 11 in advance in the preheating period by the external heater, in which heat is difficult to reach from the internal heater and the influence of the outside air (heat dissipation loss) is likely to occur. As a result, it is possible to suppress the condensation of the aerosol generated when the internal heater 36 is activated. Therefore, it is possible to secure a sufficient amount of aerosol delivered during smoking, and to improve the feeling of smoke volume.

In the above embodiment, the external heater 35 is arranged in the first region R1 including the base end 32c of the cavity side peripheral wall 32 (side peripheral portion) where the cavity bottom 331 is provided and the third region R3 including the insertion port 38. Instead, the external heater 35 is arranged in the second region R2 located closer to the insertion opening 38 side than the first region R1, so that the region of the outer peripheral portion of the tobacco rod 11, particularly on the proximal end side, is covered by the external heater 35. It can be heated intensively. Thereby, it is possible to effectively suppress the condensation of the aerosol generated on the tip end side (upstream side) of the tobacco rod 11 on the base end side (downstream side) of the tobacco rod 11.

In particular, since the internal heater 36 in the present embodiment has a tapered shape in which the diameter decreases from the base end portion 36a side toward the tip end portion 36b side, the tip end portion 36b of the internal heater 36 is smaller than the base end side. Although the amount of heat radiated to the tobacco rod 11 tends to decrease, by arranging the external heater 35 around the tip portion 36b of the internal heater 36 (a position corresponding to the tip portion 36b of the internal heater 36), The shortage of the amount of heat radiation at the tip portion 36b can be appropriately compensated. In addition, by disposing the external heater 35 in the first region R1 where the amount of heat radiated from the internal heater 36 can be sufficiently ensured, the power consumption of the power source 5 is suppressed, and the base end region in the outer peripheral portion of the tobacco rod 11 is kept outside. It can be efficiently heated by the heater 35.

Further, in the present embodiment, since the external heater 35 is not arranged in the third region R3 of the cavity side peripheral wall 32 (side peripheral portion), when the external heater 35 is operated, the front end portion of the mouthpiece portion 12 is activated. It is possible to prevent the filter segment, which is located at, for example, from being burnt or melted by the heat of the external heater 35.

In addition, in the present embodiment, an example in which the shape of the internal heater 36 is a truncated cone shape has been described, but the internal heater 36 having a tapered shape from the cavity bottom 331 side toward the insertion port 38 side is adopted as described above. As a result, the internal heater 36 can easily penetrate the filler 111 of the tobacco rod 11 inserted into the storage cavity 34. Further, in the state where the internal heater 36 penetrates the filling 111, the contact state between the internal heater 36 and the filling 111 can be maintained well. As a result, the heat generated by the internal heater 36 is easily transmitted to the filling material 111, and the heating efficiency of the filling material 111 can be improved. In addition, in the present embodiment, the internal heater 36 is inserted into the filler 111 of the tobacco rod 11 that is inserted into the storage cavity 34, but the end surface of the filler 111 on the leading end side (upstream side) of the tobacco rod 11 is inserted. The internal heater 36 may be inserted in the formed recess.

Also, the internal heater 36 can adopt various shapes. For example, the internal heater 36 may have a truncated cone shape or a truncated cone shape, and may have a tapered shape from the cavity bottom 331 side toward the insertion port 38 side. For example, a conical shape may be used instead of the truncated cone shape. Further, the internal heater 36 may have a columnar shape. In this case, a conical portion may be formed on the tip side of the cylindrical portion of the internal heater 36. Further, the internal heater 36 has n-fold symmetry with respect to the central axis CL1 of the housing cavity 34, and n may be an integer of 3 or more.

Further, in the example shown in FIG. 5, the tip portion 36b of the internal heater 36 of the heater 3 corresponds to the tip of the second region R2 (end portion on the insertion opening 38 side) of the cavity side peripheral wall 32 (side peripheral portion). However, the present invention is not limited to this. For example, as in the modification shown in FIG. 14, the tip portion 36b of the internal heater 36 may be arranged at a position corresponding to the middle portion of the second region R2. Further, as in the modification shown in FIG. 15, the tip portion 36b of the internal heater 36 may be arranged at a position corresponding to the third region R3. Further, as in the modification shown in FIG. 16, the tip portion 36b of the internal heater 36 may be arranged at a position corresponding to the first region R1.

Although the embodiment and the modified example according to the present invention have been described above, the non-combustion heating type smoking device according to the present invention is not limited to these, and these can be combined as much as possible.

1... Non-combustion heating type smoking device 2... Housing 3... Heater 4... Controller 5... Power source 10... Non-combustion heating type smoking article 11... Tobacco rod 12...・Mouthpiece part 34・・・Accommodation cavity 35・・・External heater 36・・・Internal heater

Claims

A receiving cavity for receiving a tobacco rod containing tobacco shreds and an aerosol-generating substrate;
An internal heater, which is disposed in the storage cavity and penetrates into a tobacco rod inserted into the storage cavity or is inserted into a recess formed in an end surface of the tobacco rod, wherein the tobacco rod is heated from the inside. And an internal heater for volatilizing the aerosol-generating substrate,
An external heater disposed at a side peripheral portion of the accommodation cavity, and preheating the outer peripheral portion of the tobacco rod at least during a preheating period of the tobacco rod, to suppress condensation of aerosol generated when the internal heater operates. ,
With
Non-combustion heating type smoking device.
A control unit for controlling the internal heater and the external heater,
The control unit controls the temperature of the external heater to be higher than the temperature of the internal heater during a simultaneous heating period in which both the internal heater and the external heater operate.
The non-combustion heating type smoking device according to claim 1.
The control unit activates the external heater when the elapsed time from the preheating start of the tobacco rod by the external heater reaches a predetermined set time or when the temperature of the external heater reaches a predetermined set temperature. Stop, but continue to operate the internal heater,
The non-combustion heating type smoking device according to claim 2.
The control unit increases the temperature of the internal heater after the operation of the external heater is stopped compared to before the operation of the external heater is stopped,
The non-combustion heating type smoking device according to claim 3.
The control unit starts the preheating by operating only the external heater when starting the preheating of the tobacco rod, and operates the internal heater after the operation of the external heater.
The non-combustion heating type smoking device according to any one of claims 2 to 4.
The accommodating cavity has an insertion port that is an open end that is located on the tip side of the side peripheral portion and that is open so that the tobacco rod can be inserted, and a cavity bottom portion that is located on the base end side of the side peripheral portion. Have,
The side peripheral portion has a first region including a base end where the cavity bottom portion is provided, and a second region adjacent to the first region and located on the insertion opening side,
The external heater is not arranged in the first region and is arranged in the second region,
The non-combustion heating type smoking device according to any one of claims 1 to 5.
The external heater is arranged over the entire circumference along the circumferential direction of the side peripheral part in a part of the second region or the whole of the second region,
The non-combustion heating type smoking device according to claim 6.
The internal heater has n-fold symmetry with respect to the central axis of the accommodation cavity, and n is an integer of 3 or more,
The non-combustion heating type smoking device according to claim 6 or 7.
The non-combustion heating type smoking device according to any one of claims 6 to 8, wherein the internal heater has a columnar shape, and a conical portion is formed on the tip side.
The non-combustion according to any one of claims 6 to 8, wherein the internal heater has a truncated cone shape or a truncated cone shape, and has a tapered shape from the cavity bottom side toward the insertion port side. Heating type smoking device.
The non-combustion heating type smoking device according to any one of claims 6 to 8, wherein the internal heater has a conical shape or a truncated cone shape.
The side peripheral portion further has a third region adjacent to the second region and including the insertion opening, and the external heater is not arranged in the third region, any one of claims 6 to 11. The non-combustion heating type smoking device according to claim 1.
The non-combustion heating type smoking device according to claim 12, wherein a tip position of the internal heater is associated with the second region or the third region in the side peripheral portion.