Non-combustion heating type smoking device

Abstract

A non-combustion heating type smoking device is provided that can suppress aerosol condensation caused by heating and deliver a sufficient amount of aerosol to a smoker. The non-combustion heating type smoking device comprises: a storage chamber, the storage chamber is used to store a cigarette rod containing tobacco and an aerosol generating substrate; an internal heater, the internal heater is arranged in the storage chamber, penetrates or inserts into the cigarette rod inserted into the storage chamber, and volatilizes the aerosol generating substrate by heating the cigarette rod from the inside; and an external heater, the external heater is arranged at the side periphery of the storage chamber, and suppresses aerosol condensation generated when the internal heater is working by preheating the outer periphery of the cigarette rod at least during the preheating period of the cigarette rod.

Description

Technical Field

[0001] The present invention relates to a non-combustion heating type smoking device. Background Art

[0002] There is known a non-combustion heating type smoking device (see, for example, Patent Document 1) that heats a cigarette rod containing shredded tobacco and an aerosol-forming base material (glycerin, propylene glycol) with a heater such as an electric heater to deliver aerosol generated to the smoker.

[0003] In non-combustion heating type smoking devices, it has always been desired to increase the amount of aerosol generated (delivered) to enhance the smoke volume. To this end, it is important to deliver the aerosol generated by heating the aerosol-forming substrate to the mouthpiece without waste.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: (Japan) Patent No. 6026556

[0007] Patent Document 2: (Japan) Patent Publication No. 2014-525251

[0008] Patent Document 3: (Japan) Patent Publication No. 2013-511962 Summary of the invention

[0009] Technical problem to be solved by the invention

[0010] However, in the existing non-combustion heating type smoking device, when the cigarette rod is heated, there is a local part of the product with low temperature. Once the volatilized aerosol-forming substrate encounters the part with low product temperature, it may be cooled and condensed. As a result, a sufficient amount of aerosol cannot be delivered to the smoker, which may reduce the amount of smoke. The present invention is made in view of the above situation, and its purpose is to provide a non-combustion heating type smoking device that can suppress the condensation of aerosol caused by heating and deliver a sufficient amount of aerosol to the smoker.

[0011] Means for solving technical problems

[0012] The non-combustion heating type smoking device of the present invention for solving the above-mentioned technical problems comprises: a storage cavity, which is used to store a cigarette rod containing tobacco and an aerosol generating substrate; an internal heater, which is arranged in the storage cavity, penetrates into the cigarette rod inserted into the storage cavity or is inserted into a recess formed on the end surface of the cigarette rod, and volatilizes the aerosol generating substrate by heating the cigarette rod from the inside; and an external heater, which is arranged on the side periphery of the storage cavity, and suppresses the condensation of aerosol generated when the internal heater is working by preheating the outer periphery of the cigarette rod at least during the preheating period of the cigarette rod.

[0013] Furthermore, a control unit for controlling the internal heater and the external heater may be provided, wherein the control unit controls the external heater so that the temperature of the external heater is higher than the temperature of the internal heater during a heating period in which both the internal heater and the external heater are operated.

[0014] In addition, when the time elapsed since the external heater starts preheating the cigarette rod reaches a specified set time, or when the temperature of the external heater reaches a specified set temperature, the control unit can stop the operation of the external heater but continue the operation of the internal heater.

[0015] After the operation of the external heater stops, the control unit may increase the temperature of the internal heater compared to before the operation of the external heater stops.

[0016] When preheating of the cigarette rod starts, the control unit may start the preheating by operating only the external heater when preheating of the cigarette rod starts, and operate the internal heater later than the external heater.

[0017] In addition, the storage cavity may have: an insertion port, which is an open end located on the front end side of the side peripheral portion and is open in a manner that allows the cigarette rod to be inserted; a cavity bottom, which is located on the base end side of the side peripheral portion; the side peripheral portion has: a first area including a base end provided with the cavity bottom, and a second area adjacent to the first area and located on the insertion port side, the external heater is not arranged in the first area but is arranged in the second area.

[0018] The external heater may be disposed along the entire circumference of the side peripheral portion in a partial section or an entire section of the second region.

[0019] In addition, the internal heater may have n-fold symmetry with respect to a central axis of the receiving chamber, where n is an integer greater than or equal to 3.

[0020] Furthermore, the internal heater may have a cylindrical shape and be formed with a tapered portion at a front end side.

[0021] Furthermore, the in-unit heater may have a tapered shape or a truncated cone shape and may be formed in a shape that becomes thinner from the cavity bottom side toward the front end on the insertion port side.

[0022] The internal heater may have a conical shape or a truncated cone shape.

[0023] The side peripheral portion may further include a third region adjacent to the second region and including the insertion port, and the external heater is not arranged in the third region.

[0024] A front end position of the internal heater may correspond to the second region or the third region in the side peripheral portion.

[0025] It should be noted that the means for solving the technical problem of the present invention can be used in combination as much as possible.

[0026] Effects of the Invention

[0027] According to the present invention, it is possible to provide a non-combustion heating type smoking device that can suppress condensation of aerosol caused by heating and deliver a sufficient amount of aerosol to a smoker. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a diagram schematically showing the internal structure of the non-combustion heating-type smoking device according to the first embodiment.

[0029] Figure 2 A schematic diagram of the structure of a non-combustion heat-type smoking article used in a non-combustion heat-type smoking device.

[0030] Figure 3 This is a schematic diagram of a longitudinal section of a heater.

[0031] Figure 4 It is a perspective view showing a schematic structure of a heater.

[0032] Figure 5 This is a diagram showing a state where the cigarette rod of the non-combustion heat-type smoking article is inserted from the insertion port of the heater into the storage chamber.

[0033] Figure 6 This is a diagram showing a state where the cigarette rod of the non-combustion heat-type smoking article is inserted from the insertion port of the heater into the storage chamber.

[0034] Figure 7 It is a timing chart showing the operating states of the external heater and the internal heater during heating control.

[0035] Figure 8This is a diagram for explaining the change in surface temperature of the external heater and the internal heater during heating control.

[0036] Fig. 9 It is a figure which shows the result of the temperature measurement test.

[0037] Fig.10 It is a figure which shows the result of the temperature measurement test.

[0038] Fig.11 It is a figure which shows the result of the temperature measurement test.

[0039] Fig.12 A diagram showing the results of a temperature measurement test.

[0040] Fig.13 It is a diagram showing the product temperature measurement position of the cigarette rod.

[0041] Fig.14 It is a diagram showing a modified example of the internal heater in the heater.

[0042] Fig.15 It is a diagram showing a modified example of the internal heater in the heater.

[0043] Fig.16 It is a diagram showing a modified example of the internal heater in the heater. DETAILED DESCRIPTION

[0044] Here, an embodiment of the non-combustion heating type smoking device of the present invention is described based on the drawings. It should be noted that unless otherwise specified, the technical scope of the present invention is not limited to the size, material, shape and relative arrangement of the components described in this embodiment.

[0045] <Implementation Method 1>

[0046] Figure 1 1 is a diagram schematically showing the internal structure of the non-combustion heating type smoking device 1 according to Embodiment 1. The non-combustion heating type smoking device 1 has a housing 2 for housing various components. The housing 2 houses a heater 3, a controller (control unit) 4, a power source 5, and the like.

[0047] Figure 2This is a schematic structural diagram of a non-combustion heating type smoking article 10 used in a non-combustion heating type smoking device 1. The non-combustion heating type smoking article 10 has a cigarette rod 11 and a mouthpiece 12. In the following description, the end of the cigarette rod 11 side in the non-combustion heating type smoking article 10 is called the front end, and the mouthpiece 12 side is called the base end. The cigarette rod 11 is composed of a filler 111 containing tobacco shreds and an aerosol generating substrate and a rolling paper 112 that wraps the filler 111. The material of the tobacco shreds is not particularly limited, and lamina or petioles well known to the public can be used. The filler 111 includes an aerosol generating substrate that generates an aerosol. The type of aerosol generating substrate is not particularly limited, and a substance extracted from various natural products can be appropriately selected according to the purpose. As an aerosol generating substrate, for example, there are glycerin, propylene alcohol, triacetylcholine, 1,3-butanediol and a mixture thereof. The filler 111 including tobacco shreds and aerosol generating substrate may contain adhesives, gelling agents, binders, flavors, hydrophilic flavors, lipophilic flavors, viscosity modifiers, moisturizers or reinforcing materials as additives in tobacco raw materials such as tobacco powder, for example, tobacco flakes, tobacco shreds of the tobacco flakes, tobacco particles and other reconstituted tobacco raw materials. In addition, the filler 111 may also contain flavors. The type of flavor is not particularly limited.

[0048] The mouthpiece 12 includes a filter section formed by wrapping cellulose acetate in a cylindrical shape with a cigarette paper, for example, and filters a portion of the aerosol generated by the cigarette rod 11 during smoking. Of course, the mouthpiece 12 may also include a section other than the filter section. The cigarette rod 11 and the mouthpiece 12 are connected to each other by being integrally wrapped with the tipping paper 13.

[0049] Figure 3 3 is a schematic diagram of a longitudinal section of the heater 3. Specifically, Figure 3 Shown in Figure 1 The cross-sectional structure of the heater 3 in the cross section taken along the AA line in FIG. Figure 4 It is a perspective view showing a schematic structure of the heater 3 .

[0050] The heater 3 has a heater housing 31 in the shape of a bottomed cylinder. The heater housing 31 includes a bottom 311 in the shape of a disk and a cylindrical outer wall 312 rising from the bottom 311. The open end of the outer wall 312 in the heater housing 31 is opened to the outside of the housing 2 through an opening provided in the housing 2, forming a cylindrical hollow portion, i.e., a storage cavity 34, into which the cigarette rod 11 of the non-combustion heating type smoking article 10 can be inserted.

[0051] Here, a thick wall portion 313 having an inner diameter smaller than other portions is formed at the front end side of the outer tube wall 312 in the heater housing 31. The front end of the outer tube wall 312 mentioned here refers to the end portion of the outer tube wall 312 on the opposite side of the base end connected to the bottom 311. In addition, a cavity side peripheral wall 32 having a cylindrical shape is provided on the inner side of the outer tube wall 312 in the heater housing 31. The outer diameter of the cavity side peripheral wall 32 is equal to the inner diameter of the thick wall portion 313 in the outer tube wall 312. In addition, as Figure 3 As shown, an annular and hollow air insulation portion 37 is formed between the inner surface of the outer tube wall 312 in the heater housing 31 and the outer peripheral surface 32b of the cavity side peripheral wall 32. In addition, an insertion port 38 is formed at the front end of the cavity side peripheral wall 32, which is open in a manner that the cigarette rod 11 can be inserted. It is worth noting that the end of the cavity side peripheral wall 32 on the opposite side of the front end side where the insertion port 38 is formed is the base end 32c.

[0052] A heat-resistant cup 33 having a bottom cylindrical shape is provided on the bottom 311 side of the heater housing 31. The heat-resistant cup 33 is formed of a heat-resistant material such as aluminum, and has a cavity bottom 331 in a disc shape and a cavity side peripheral wall 332 rising from the cavity bottom 331. The cavity bottom 331 of the heat-resistant cup 33 is arranged in a state overlapping with the inner side of the bottom 311 of the heater housing 31, and forms the cavity bottom of the storage cavity 34. In addition, the side peripheral portion of the storage cavity 34 is formed by the cavity side peripheral wall 32 and the cavity side peripheral wall 332.

[0053] like Figure 3 and Figure 4 As shown, the heater 3 forms a hollow portion, namely, a receiving chamber 34, for receiving the cigarette rod 11 through the heat-resistant cup 33 and the cavity side wall 32. Figure 3 and Figure 4 As shown, on the cavity side peripheral wall 32, the annular external heater 35 is arranged to face the storage cavity 34. The external heater 35 is stored in the recessed portion of the cavity side peripheral wall 32 in a manner that it is flush with the inner peripheral surface 32a of the cavity side peripheral wall 32. Here, the mark 35a is the heating surface facing the storage cavity 34. It is worth noting that the annular external heater 35 is arranged along the entire circumference of the inner peripheral surface 32a of the cavity side peripheral wall 32. In other words, the external heater 35 is arranged along the entire circumference of the side peripheral portion along the circumference of the storage cavity 34. It is worth noting that Figure 3 The symbol CL1 shown is the central axis of the heater housing 31. The central axis CL1 is also the central axis of the storage chamber 34 and the chamber-side peripheral wall 32.

[0054] In addition, if Figure 3 and Figure 4As shown, an internal heater 36 is provided in the storage chamber 34. The internal heater 36 has a truncated cone shape and is vertically protruded from the central portion of the bottom 311 of the heater housing 31 toward the storage chamber 34 side. A through hole is formed in the central portion of the cavity bottom 331 of the heat-resistant cup 33, and the internal heater 36 is inserted into the through hole to protrude from the cavity bottom 331 toward the storage chamber 34. The central axis of the internal heater 36 is coaxial with the central axis CL of the heater housing 31 (storage chamber 34). Mark 36a is the base end portion of the internal heater 36, and mark 36b is the front end portion of the internal heater 36. The internal heater 36 extends from the cavity bottom 331 toward the insertion port 38, and gradually tapers from the base end portion 36a toward the front end portion 36b. It is worth noting that the types of the internal heater 36 and the external heater 35 are not particularly limited, and for example, a structure in which electric heating wires (for example, nickel-chromium alloy, chromium-iron alloy, nickel-iron alloy, etc.) are arranged all over a steel material, or a ceramic heater, a sheathed heater, etc. It is worth noting that the so-called sheathed heater is a heater in which a heating wire and a filler are covered together with a metal tube.

[0055] In addition, in the present embodiment, the cavity side peripheral wall 32 is formed of a known heat insulating and heat resistant material to withstand the heat of the external heater 35 and prevent the heat of the external heater 35 from spreading. Examples of materials for the cavity side peripheral wall 32 having such heat insulating and heat resistant properties include ceramics of alumina and silica, and resin materials such as PEEK (polyetheretherketone), PPS (polyphenylene sulfide), and PTFE (polytetrafluoroethylene) having high heat resistance.

[0056] It is worth noting that in this embodiment, the inner circumferential surface 32a of the cavity side circumferential wall 32, the inner circumferential surface 332a of the cavity side circumferential wall 332 of the heat-resistant cup 33, and the heating surface 35a of the external heater 35 are on the same plane without any height difference, so the inner diameter of the storage cavity 34 is constant along the direction of the central axis CL1. In this embodiment, the inner diameter of the storage cavity 34 can be equal to the outer diameter of the cigarette rod 11, or can be slightly larger than the outer diameter of the cigarette rod 11.

[0057] here, Figure 3The R1 to R3 shown are the first to third regions in the cavity side peripheral wall 32 (side peripheral portion). The first region R1 in the cavity side peripheral wall 32 is a region including the base end 32c provided with the cavity bottom 331. In addition, the second region R2 in 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 in which the external heater 35 is arranged in a part of the interval or the entire interval. That is, the second region R2 has the meaning of being a region that limits the maximum range of the formation of the external heater 35, and the external heater 35 is arranged in the entire area or a part of the second region R2. In addition, the third region R3 on 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 storage cavity 34, and are formed in the order of the first region R1, the second region R2, and the third region R3 from the cavity bottom 331 toward the insertion port 38. It is worth noting that the length of each region of the first region R1 to the third region R3 in the direction of the central axis CL1 can be appropriately changed. Figure 3 As shown in FIG. 1 , on the cavity side peripheral wall 32, the external heater 35 is only arranged in the second region R2, and the external heater 35 is not arranged in the first region R1 and the third region R3. Figure 3 In the illustrated example, the external heater 35 is disposed in the entire section of the second region R2 in the chamber-side peripheral wall 32 , but the external heater 35 may be provided only in a part of the section of the second region R2 .

[0058] Figure 5 and Figure 6 3 is a diagram showing a state where the cigarette rod 11 of the non-combustion heating type smoking article 10 is inserted into the storage chamber 34 from the insertion port 38 in the heater 3. Since the internal heater 36 of the heater 3 in this embodiment has a truncated cone shape and tapers toward the front end 36b, when the cigarette rod 11 (filler 111) is inserted into the storage chamber 34, the internal heater 36 can easily penetrate the cigarette rod 11 (filler 111). It is worth noting that in this embodiment, when the front end surface 11a (refer to Figure 2 ) abuts against the bottom of the storage cavity 34, i.e., the cavity bottom 331 of the heat-resistant cup 33, the cigarette rod 11 is inserted into the storage cavity 34. Figure 5 As shown, when the cigarette rod 11 is completely inserted into the storage cavity 34 , the rear end portion 11 b of the cigarette rod 11 is located at a position corresponding to the third region R3 in the cavity side peripheral wall 32 . Figure 3The mark P1 shown indicates the position corresponding to the rear end 11b of the cigarette rod 11 (hereinafter referred to as the "storage rod rear end position") when the cigarette rod 11 is inserted into the storage chamber 34. In this embodiment, the spacing between the storage rod rear end position P1 and the external heater 35 is set to a relatively small size of about 1 mm.

[0059] The heater 3 having the above structure includes: an external heater 35, which is arranged at the side periphery of the storage chamber 34; and an internal heater 36, which is arranged at the center side of the cross section of the storage chamber 34 along the central axis CL1. The external heater 35 and the internal heater 36 in the heater 3 are powered by the power supply 5 to generate heat. The power supply 5 is not particularly limited, but can be, for example, a rechargeable lithium-ion battery. Figure 1 In the figure, the connection between the external heater 35 and the internal heater 36 in the heater 3 and the power source 5 is not shown, but the external heater 35 and the internal heater 36 are connected to the power source respectively. In addition, the controller 4 is electrically connected to the power source 5, and the controller 4 controls the power supply from the power source 5 to the external heater 35 and the internal heater 36. It is worth noting that the non-combustion heating type smoking device 1 is provided with a user interaction interface (for example, buttons, etc.) not shown in the figure, which is operated by the user (smoker), and the controller 4 is electrically connected to the user interaction interface. The controller 4 controls the operation of the heater 3 (external heater 35 and internal heater 36) by detecting the user's operation on the user interaction interface. The control of the external heater 35 and the internal heater 36 by the controller 4 in the non-combustion heating type smoking device 1 is described below.

[0060] For example, when the non-combustion heating type smoking device 1 is powered off, the user performs a predetermined on-operation operation on the operating button of the non-combustion heating type smoking device 1, and the controller 4 starts to supply power from the power source 5 to the heater 3, and performs the control operation. Figure 5 The heating control for heating the cigarette rod 11 which is stored in the storage chamber 34 of the heater 3 is shown. Figure 7 1 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 performed by the controller 4 . Figure 8 It is a diagram for explaining the change in the surface temperature of the external heater 35 and the internal heater 36 during the heating control.

[0061] exist Figure 7 In the above, time T0 represents the time when the controller 4 detects the opening operation of the operation button of the non-combustion heating type smoking device 1 (hereinafter referred to as "heating start time"). Figure 7 As shown, at the start time of heating, the controller 4 causes the power supply 5 to supply power only to the external heater 35 .

[0062] Then, at time T1, the controller 4 continues the power supply from the power source 5 to the external heater 35, and starts the power supply from the power source 5 to the internal heater 36. Hereinafter, time T1 is referred to as the "internal heating start time". Then, at time T2, the controller 4 continues the power supply from the power source 5 to the internal heater 36, and stops the power supply from the power source 5 to the external heater 35. Hereinafter, time T2 is referred to as the "external heating stop time". Then, at time T3 after a prescribed smoking time has passed from time T0 (heating start time), the power supply from the power source 5 to the internal heater 36 is stopped. Hereinafter, time T3 is referred to as the "heating stop time".

[0063] As described above, the non-combustion heating type smoking device 1 of this embodiment operates only the external heater 35 at the heating start time of starting to heat the cigarette rod 11, and preheats the cigarette rod 11 (initial heating). Here, since the external heater 35 is arranged along the cavity side peripheral wall 32 located at the outer peripheral part (side) of the storage cavity 34, the outer peripheral part of the cigarette rod 11 stored in the storage cavity 34 can be efficiently heated. That is, before the internal heater 36 starts heating the cigarette rod 11 at time T1 (internal heating start time), the cigarette rod 11, especially the outer peripheral part, can be efficiently preheated. Here, the period from time T0 (heating start time) to time T1 (internal heating start time) is referred to as the "preheating period". It is worth noting that the preheating period can be set to the time when the time from the heating start time (i.e., the preheating start) reaches the specified set time, or the time when the temperature of the external heater 35 reaches the specified set temperature. For example, during the preheating period, the controller 4 can set the set temperature when controlling the external heater 35 to 300°C.

[0064] Then, from the moment when the time elapsed from the start of heating reaches the prescribed set time, or the moment when the temperature of the external heater 35 reaches the prescribed set temperature, that is, from time T1 (the start time of internal heating) to time T2 (the stop time of external heating) (hereinafter referred to as the "simultaneous heating period"), the cigarette rod 11 is heated by both the external heater 35 and the internal heater 36. As shown above, the internal heater 36 is coaxially arranged with the central axis CL1 of the storage chamber 34. Therefore, the heat of the internal heater 36 that penetrates into the cigarette rod 11 (filler 111) is radially conducted from the center side of the cigarette rod 11 toward the peripheral side. As a result, the cigarette rod 11 can be efficiently heated, and the aerosol-forming matrix (for example, glycerin, etc.) contained in the filler 111 of the cigarette rod 11 and the flavor components contained in the tobacco shreds can be volatilized in a short time to generate an aerosol containing the flavor components.

[0065] It is worth noting that in the filler 111 of the cigarette rod 11 containing an aerosol-generating substrate (for example, glycerin, etc.), as the product temperature increases, the water (moisture) in the filler 111 evaporates first. This evaporation occurs near the boiling point of water (100°C). Then, when the product temperature of the filler 111 in the cigarette rod 11 further increases, nicotine with a boiling point of about 250°C at one atmosphere of pressure begins to volatilize, and then, after the product temperature further increases, glycerin with a boiling point of about 290°C at one atmosphere of pressure evaporates and is inhaled as an aerosol. It is obvious to those skilled in the art that the tobacco raw materials contain multiple components, which exist as compounds, so it is not a simple evaporation phenomenon that occurs only near the boiling points of pure substances such as water, nicotine and glycerin mentioned above, but it should be scientifically considered that the main components evaporate (volatilize) in the order of high and low boiling points.

[0066] Here, if Figure 8 As shown, during the simultaneous heating period (time T1-T2), the controller 4 controls the external heater 35 in such a manner that the temperature is higher than the temperature of the internal heater 36. For example, during the simultaneous heating period, the controller 4 controls the external heater 35 and the internal heater 36 in such a manner that the set temperature of the external heater 35 is set to 300°C and the set temperature of the internal heater 36 is set to 250°C. In this embodiment, during the preheating period of the cigarette rod 11, the outer periphery of the cigarette rod 11 is quickly and efficiently heated by the external heater 35 that is in contact with or close to the outer periphery of the cigarette rod 11, and during the subsequent simultaneous heating period, the temperature of the external heater 35 is controlled in such a manner that the temperature is higher than the temperature of the internal heater 36. In this way, the outer periphery of the cigarette rod 11, which is difficult to reach due to the separation from the internal heater 36 and is easily affected by the outside air (heat dissipation loss), can be actively heated. That is, the central side of the cross section of the cigarette rod 11 can be efficiently heated by the internal heater 36, and the outer peripheral portion of the cigarette rod 11, which is difficult to transfer heat from the internal heater 36 and is easily affected by the outside air (heat dissipation loss), can be efficiently heated by the external heater 35. Therefore, the entire cigarette rod 11 can be uniformly heated to a temperature at which the aerosol generating substrate fully volatilizes.

[0067] In addition, during the preheating period, only the external heater 35 is used to heat the cigarette rod 11, and the internal heater 36 is operated after the preheating period has passed after the external heater 35 is operated. This can reduce the total power consumption compared to the case where both the external heater 35 and the internal heater 36 are operated during the preheating period.

[0068] Furthermore, by actively heating the outer periphery of the cigarette rod 11 by the external heater 35 during the preheating period and the simultaneous heating period as described above, it is possible to suppress condensation (condensation / liquefaction) of the temporarily volatilized aerosol-forming substrate on the outer periphery of the cigarette rod 11. Therefore, in particular, the aerosol delivery amount during the initial smoking can be sufficiently ensured, and the smoke volume feeling can be improved.

[0069] In particular, according to the non-combustion heating type smoking device 1 in this embodiment, Figure 5 As shown, the external heater 35 is located on the base end side (mouthpiece 12 side) of the cigarette rod 11 stored in the storage chamber 34. Therefore, the external heater 35 can be used to heat the outer peripheral portion of the cigarette rod 11, especially the base end side region. This has the advantage of being able to effectively suppress the aerosol generated on the front end side (upstream side) of the cigarette rod 11 from condensing on the base end side (downstream side) of the cigarette rod 11.

[0070] Here, it is preferred that the length of the external heater 35 extending in the direction of the central axis CL1 of the storage chamber 34, i.e., the width of the external heater, is at least one-third of the cigarette rod 11. Accordingly, the outer periphery of the cigarette rod 11 can be fully preheated during the preheating period of the cigarette rod 11 before the internal heater 36 starts heating.

[0071] Then, as described above, after the entire cigarette rod 11 is fully heated during the simultaneous heating period, the temperature of the cigarette rod 11 can be maintained at a temperature at which the aerosol does not condense only by the heating of the internal heater 36, so the controller 4 stops the operation of the external heater 35 when the external heating stop time (time T2) is reached. At this 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. It is worth noting that the external heating stop time (time T2) at which the operation of the external heater 35 is stopped can be set to the moment when the time elapsed from the start of heating (i.e., the start of preheating) reaches a prescribed set time, or the moment when the temperature of the external heater 35 reaches a prescribed set temperature. Alternatively, various methods can be used to stop the operation of the external heater 35 at the moment when a certain time has passed after the temperature of the external heater 35 reaches the prescribed set temperature.

[0072] After the external heating stop time (time T2) has passed, the cigarette rod 11 is heated only by the internal heater 36, so the temperature of the external heater 35 naturally drops. Figure 8 As shown, the temperature of the internal heater 36 exceeds the temperature of the external heater 35 during the period from the external heating stop time (time T2) to the heating stop time (time T3) (hereinafter referred to as the "internal heating period").

[0073] Here, the internal heater 36 disposed in the center has a higher heating efficiency when heating the cigarette rod 11 than the external heater 35 disposed on the outer peripheral side of the storage chamber 34. Therefore, during the remaining smoking period after the conditions that make it difficult to cause condensation of aerosol by sufficiently heating the entire cigarette rod 11 during the simultaneous heating period are met, the cigarette rod 11 is heated only by the internal heater 36 having a higher heating efficiency, thereby stably and continuously generating aerosol.

[0074] In addition, after the operation of the external heater 35 stops, the controller 4 can control the power supply from the power supply 5 to the internal heater 36 in such a way that the temperature of the internal heater 36 increases compared to before the operation of the external heater 35. For example, the controller 4 can change the set temperature of the internal heater 36 from 250°C to 350°C. Preferably, the set temperature of the internal heater 36 during the internal heating period is set to an appropriate temperature at which the aerosol generating substrate contained in the cigarette rod 11 can be stably and continuously volatilized only by heating by the internal heater 36. It should be noted that, as described above, when the set temperature of the internal heater 36 is increased after the operation of the external heater 35 stops, the power consumption of the internal heater 36 increases, but since the operation of the external heater 35 stops, the total power consumption can be reduced.

[0075] Then, at time T3 (heating stop time) when a predetermined smoking time has elapsed from the heating start time (time T0), the controller 4 stops the power supply from the power source 5 to the internal heater 36 .

[0076] Figures 9 to 12 The graph shows the results of a 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 cigarette rod 11 are measured when the controller 4 controls the heating of the heater 3 . Fig.13 1 is a diagram showing the position of the cigarette rod 11 where the product temperature is measured.

[0077] In the temperature measurement test, the product temperature of the cigarette rod 11 was measured. Fig.13 The temperature of the first measurement position MP1 to the third measurement position MP3 shown in FIG. The interval dimension from each measurement position MP1 to MP3 in the radial direction of the storage chamber 34 to the side circumference surface of the storage chamber 34 (the inner circumference surface 32a of the chamber side circumference wall 32) is 1.5 mm. In addition, the interval dimension from each measurement position MP1 to MP3 in the radial direction of the storage chamber 34 to the base end portion 36a of the internal heater 36 is 1.5 mm.

[0078] In addition, if Fig.13As shown, the first measurement position MP1 to the third measurement position MP3 are arranged in the order of the first measurement position MP1, the second measurement position MP2, and the third measurement position MP3 from the side of the cavity bottom 331. In the direction of the central axis CL1 of the storage cavity 34, the spacing dimension between the cavity bottom 331 and the first measurement position MP1 is 2 mm. In addition, the spacing dimension between the first measurement position MP1 and the second measurement position MP2 is 5 mm. In addition, the spacing dimension between the second measurement position MP2 and the third measurement position MP3 is 6 mm. In addition, the spacing dimension between the third measurement position MP3 and the rear end position P1 of the rod when stored is 2 mm. In addition, in the heating control, the elapsed time from the start time of heating to the start time of internal heating is set to 6 seconds, the elapsed time from the start time of heating to the stop time of external heating is set to 20 seconds, and the elapsed time from the start time of heating to the stop time of heating is set to 420 seconds.

[0079] In addition, Figure 10 to Figure 12 The temperature change represented by the solid line is Figure 7 and Figure 8 The temperature changes at each measuring position MP1 to MP3 when the heating control of the present embodiment is performed are described in the figure (hereinafter referred to as the "Example"). In addition, the temperature changes indicated by the dotted lines are the temperature changes at each measuring position MP1 to MP3 when the heating control is performed using only the internal heater 36 without using an external heater (hereinafter referred to as the "Comparative Example"). Figure 10 to Figure 12 The double-dotted line is the target product temperature when the cigarette rod 11 is heated. The target temperature is, for example, 150°C. Figure 10 to Figure 12 As shown in FIG. 1 , no significant difference was found between the embodiment and the comparative example in heating control at the first measurement position MP1 and the second measurement position MP2 located at the position corresponding to the first region R1 on the cavity side peripheral wall 32. Since the first measurement position MP1 and the second measurement position MP2 are both separated from the external heater 35 and relatively close to the internal heater 36, it can be considered that the influence of the external heater 35 is small. On the other hand, as Fig.12 As shown, at the third measurement position MP3, there is a significant difference between the embodiment and the comparative example. Compared with the comparative example, the embodiment can be heated to the target product temperature in a shorter time, and the superiority of the embodiment over the comparative example can be confirmed.

[0080] As described above, according to the non-combustion heating type smoking device 1 in this embodiment, it is provided with: an internal heater 36, which is arranged in the storage chamber 34, and volatilizes the aerosol generating substrate by heating the cigarette rod 11 from the inside; an external heater 35, which is arranged on the side periphery of the storage chamber 34, and suppresses the condensation of the aerosol generated when the internal heater 36 is working by preheating the outer periphery of the cigarette rod 11 at least during the preheating period of the cigarette rod 11. Thus, the outer periphery of the cigarette rod 11, which is difficult to reach by the heat from the internal heater and is easily affected by the external air (heat dissipation loss), can be fully heated in advance during the preheating period by using the external heater. Thus, the condensation of the aerosol generated when the internal heater 36 is working can be suppressed. Therefore, the aerosol delivery amount during smoking can be fully ensured, and the smoke volume feeling can be improved.

[0081] It is worth noting that in the above embodiment, the external heater 35 is not arranged in the first region R1 including the base end 32c provided with the cavity bottom 331 and the third region R3 including the insertion port 38 on the cavity side peripheral wall 32 (side peripheral portion), and the external heater 35 is arranged in the second region R22 located closer to the insertion port 38 than the first region R1, so the external heater 35 can be used to heat the outer peripheral portion of the cigarette rod 11, especially the area on the base end side. In this way, the aerosol generated on the front end side (upstream side) of the cigarette rod 11 can be effectively suppressed from condensing on the base end side (downstream side) of the cigarette rod 11.

[0082] In particular, the internal heater 36 of the present embodiment has a tapered shape with a reduced diameter from the base end 36a side toward the front end 36b side, so the front end 36b of the internal heater 36 has a tendency to reduce the amount of heat released to the cigarette rod 11 compared to the base end side, but the external heater 35 is arranged around the front end 36b of the internal heater 36 (at a position corresponding to the front end 36b of the internal heater 36), which can appropriately supplement the insufficient amount of heat released at the front end 36a of the internal heater 36. In addition, the external heater 35 is not arranged in the first region R1 where the amount of heat released from the internal heater 36 can be sufficiently ensured, which can suppress the power consumption of the power supply 5, and can efficiently heat the base end region of the outer periphery of the cigarette rod 11 using the external heater 3.

[0083] Moreover, in this embodiment, since the external heater 35 is not configured in the third area R3 of the cavity side wall 32 (side peripheral portion), when the external heater 35 is operated, it is possible to prevent the filter section, for example, located at the front end of the mouthpiece portion 12 from being burned or melted by the heat of the external heater 35.

[0084] In addition, in the present embodiment, an example in which the shape of the internal heater 36 is a truncated cone shape is described, but by adopting such an internal heater 36 having a shape that tapers from the cavity bottom 331 side toward the front end of the insertion port 38, the internal heater 36 can be easily penetrated into the filler 111 of the cigarette rod 11 inserted into the storage cavity 34. In addition, in the state in which the internal heater 36 is penetrated into the filler 111, the contact state between the internal heater 36 and the filler 111 can be well maintained. As a result, the heat generated by the internal heater 36 is easily transferred to the filler 111, and the heating efficiency of the filler 111 can be improved. It is worth noting that in the present embodiment, the internal heater 36 is penetrated into the filler 111 of the cigarette rod 11 inserted into the storage cavity 34, but the internal heater 36 can also be inserted into the recessed portion formed on the end surface of the filler 111 on the front end side (upstream side) of the cigarette rod 11.

[0085] In addition, the internal heater 36 can adopt various shapes. For example, the internal heater 36 can have a conical shape or a frustum shape, and be formed into a shape that tapers from the cavity bottom 331 side toward the front end of the insertion port 38 side. For example, instead of the frustum shape, a conical shape can be used. In addition, the internal heater 36 can also have a cylindrical shape. In this case, a conical portion can also be formed on the front end side of the cylindrical portion of the internal heater 36. In addition, the internal heater 36 has n-fold symmetry with respect to the central axis CL1 of the storage cavity 34, and n can be an integer greater than 3.

[0086] In addition, Figure 5 In the example shown, the front end portion 36b of the internal heater 36 in the heater 3 is arranged at a position corresponding to the front end (end on the insertion port 38 side) of the second region R2 of the cavity side peripheral wall 32 (side peripheral portion), but the present invention is not limited to this. Fig.14 As shown in the modified example, the front end portion 36b of the internal heater 36 is arranged at a position corresponding to the middle portion of the second region R2. Fig.15 As shown in the modified example, the front end portion 36b of the internal heater 36 is arranged at a position corresponding to the third region R3. Fig.16 As in the illustrated modification, the front end portion 36 b of the internal heater 36 is disposed at a position corresponding to the first region R1 .

[0087] As mentioned above, although embodiment and modification of this invention were demonstrated, the non-combustion heating-type smoking device of this invention is not limited to these, These can be combined as much as possible.

[0088] Description of Reference Numerals

[0089] 1: Non-combustion heating type smoking device;

[0090] 2: Shell;

[0091] 3: Heater;

[0092] 4: Control department;

[0093] 5: Power supply;

[0094] 10: Non-combustion heating smoking articles;

[0095] 11: Cigarette holder;

[0096] 12: Mouthpiece;

[0097] 34: Storage cavity;

[0098] 35: external heater;

[0099] 36: Internal heater.

Claims

1. A non-combustion heating type smoking device, comprising: A storage cavity, the storage cavity is used to store a cigarette rod containing tobacco shreds and an aerosol generating substrate; An internal heater, the internal heater is arranged in the storage cavity, penetrates into the cigarette rod inserted into the storage cavity or is inserted into a recess formed on the end surface of the cigarette rod, and volatilizes the aerosol generating substrate by heating the cigarette rod from the inside; An external heater, which is disposed on the side periphery of the storage chamber and inhibits condensation of aerosol generated when the internal heater is operating by preheating the outer periphery of the cigarette rod at least during the preheating period of the cigarette rod; a control unit for controlling the internal heater and the external heater; The control unit performs control so that the temperature of the external heater becomes higher than the temperature of the internal heater during a simultaneous heating period when both the internal heater and the external heater are operated.

2. The non-combustion heating type smoking device according to claim 1, wherein: When the time elapsed since the external heater started preheating the cigarette rod reaches a specified set time, or when the temperature of the external heater reaches a specified set temperature, the control unit stops the operation of the external heater but continues the operation of the internal heater.

3. The non-combustion heating type smoking device according to claim 2, wherein: After the operation of the external heater stops, the control unit increases the temperature of the internal heater compared to before the operation of the external heater stops.

4. The non-combustion heating type smoking device according to claim 1, wherein: The control unit starts preheating by operating only the external heater when preheating of the cigarette rod starts, and operates the internal heater later than the external heater.

5. The non-combustion heating type smoking device according to any one of claims 1 to 4, wherein: The storage cavity has: an insertion port, which is an open end located at the front end side of the side peripheral portion and is open in a manner that the cigarette rod can be inserted; and a cavity bottom, which is located at the base end side of the side peripheral portion; The side peripheral portion includes a first region including a base end where the cavity bottom is provided, and a second region adjacent to the first region and located on the insertion port side. The external heater is not arranged in the first region but is arranged in the second region.

6. The non-combustion heating type smoking device according to claim 5, wherein: The external heater is disposed along the entire circumference of the side peripheral portion in a partial section or an entire section of the second region.

7. The non-combustion heating type smoking device according to claim 5, wherein: The internal heater has n-fold symmetry with respect to the central axis of the storage chamber, where n is an integer greater than or equal to 3.

8. The non-combustion heating type smoking device according to claim 5, wherein: The internal heater has a cylindrical shape and is formed with a tapered portion at a front end side.

9. The non-combustion heating type smoking device according to claim 5, wherein: The internal heater has a tapered shape or a frustum shape and is formed in a shape that becomes thinner from the cavity bottom side toward the front end on the insertion port side.

10. The non-combustion heating type smoking device according to claim 5, wherein: The internal heater has a conical shape or a truncated cone shape.

11. The non-combustion heating type smoking device according to claim 5, wherein: The side peripheral portion further includes a third region adjacent to the second region and including the insertion port, and the external heater is not arranged in the third region.

12. The non-combustion heating type smoking device according to claim 11, wherein: A front end position of the internal heater corresponds to the second region or the third region in the side peripheral portion.

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