HK1245594B - Flavor inhaler - Google Patents

Description

Aroma absorber

Technical Field

The present invention relates to a fragrance inhaler including a fragrance source that generates fragrance without combustion.

Background Art

A flavor inhaler (smoking article) has been proposed as an alternative to cigarettes, allowing users to enjoy flavor without burning a flavor source such as tobacco. Patent Document 1 discloses a flavor inhaler equipped with an aerosol generating source that generates aerosol without combustion. The flavor inhaler includes a cooling member for cooling aerosol generated by the aerosol generating source.

Prior art literature

Patent Literature

Patent Document 1: International Publication No. 2013/120565

Summary of the Invention

The first feature is to provide a fragrance inhaler comprising: a fragrance source that generates fragrance without combustion; a cylindrical retaining member having at least the fragrance source disposed therein; a flow path disposed within the cylindrical retaining member and extending from the fragrance source to an inhalation port for inhaling the fragrance; and a cooling layer disposed only downstream of the fragrance source; the cooling layer being disposed on the inner surface of the cylindrical retaining member and facing the flow path. Preferably, the cooling layer surrounds the second flow path over at least a portion of the second flow path.

The key point of the second feature is that, in the fragrance inhaler of the first feature, the cylindrical retaining member has a hole for allowing external air to flow directly into the flow path, and at least a portion of the cooling layer is disposed downstream of the hole. Here, "directly flow" means that external air flows into the flow path without passing through the fragrance source.

The gist of the third feature is that, in the flavor inhaler according to the second feature, the hole is formed so as to allow external air to flow into the flow path in a direction intersecting with the direction in which the flow path extends.

The fourth feature is that, in the flavor inhaler of the second or third feature, the hole is provided at the center of the cylindrical holding member in the direction in which the flow path extends, on the side opposite to the inhalation port.

The gist of the fifth feature is that, in the flavor inhaler according to any one of the second to fourth features, a plurality of holes are provided at intervals along the circumferential direction of the cylindrical holding member.

The gist of the sixth feature is that, in the flavor inhaler according to the fifth feature, one of the holes is arranged at a position deviated from a straight line connecting the other of the holes and the central axis of the cylindrical holding member.

The key point of the seventh feature is that in the flavor inhaler of any one of the first to sixth features, there is a first heat transfer component, which transfers the heat generated by the combustion-type heat source set at the ignition end of the tubular retaining component to the flavor source, and the cooling layer is separated from the first heat transfer component.

The eighth feature is that, in the flavor inhaler according to the seventh feature, the cylindrical holding member has a hole for allowing external air to flow directly into the flow path, and the hole is provided between the first heat transfer member and the cooling layer.

The gist of a ninth feature is that, in the flavor inhaler of the seventh or eighth feature, the cooling layer is formed of the same material as that of the first heat transfer member.

The gist of the tenth feature is that, in the flavor inhaler according to any one of the first to ninth features, the cooling layer defines a single passage through which the flavor passes.

The eleventh feature is that, in the flavor inhaler according to any one of the first to tenth features, the inner side of the cooling layer is hollow. Here, "hollow" means that there are no other components inside the cooling layer except the filter provided at the inhalation port.

The gist of the twelfth feature is that, in the flavor inhaler according to any one of the first to eleventh features, the cooling layer has a length equal to or greater than half the length of the flow path in the direction in which the flow path extends.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a side view of a first embodiment of a fragrance inhaler;

FIG2 is a cross-sectional view of the fragrance inhaler taken along line 2A-2A of FIG1 ;

FIG3 is a cross-sectional view of the aroma inhaler taken along line 3A-3A of FIG1 ;

FIG4 is a cross-sectional view of a flavor inhaler according to a second embodiment.

DETAILED DESCRIPTION

The following describes the embodiment. In addition, in the following description of the drawings, the same or similar parts are given the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the ratio of each dimension and the like may differ from the actual ones.

Therefore, specific dimensions and the like should be determined in consideration of the following description. Furthermore, the drawings naturally include portions where the relationship or ratio of dimensions differ from one another.

[Overview of Embodiments]

The fragrance inhaler of the embodiment comprises: a fragrance source that generates fragrance without combustion; a cylindrical retaining member that has at least the fragrance source inside; a flow path that is provided in the cylindrical retaining member and extends from the fragrance source to an inhalation port for absorbing the fragrance; a cooling layer that is provided only downstream of the fragrance source; and the cooling layer is provided on the inner surface of the cylindrical retaining member and faces the flow path. Since the cooling layer facing the flow path is provided on the inner surface of the cylindrical retaining member, it is not necessary to fill the interior of the cylindrical retaining member with a cooling member. For example, it is not necessary to block the interior of the retaining member with a curled cooling member in a manner that forms multiple channels as described in Patent Document 1. Assuming that the interior of the cylindrical retaining member is filled with a cooling member, the ventilation resistance increases, and the design of the ventilation resistance becomes complicated. In this embodiment, it is not necessary to fill the interior of the cylindrical retaining member with a cooling member, and therefore the design of the ventilation resistance becomes easy.

[First embodiment]

(Fragrance Inhaler)

The following describes a first embodiment of a fragrance inhaler. Figure 1 is a side view of the fragrance inhaler 10 according to the first embodiment. Figure 2 is a cross-sectional view of the fragrance inhaler 10 taken along line 2A-2A in Figure 1 . Figure 3 is a cross-sectional view of the fragrance inhaler 10 taken along line 3A-3A in Figure 1 . The fragrance inhaler 10 includes a cylindrical retaining member 30, an inner retaining member 50, a combustion-type heat source 70, and a fragrance source 90.

The cylindrical retaining member 30 extends from the ignition end E1 to the non-ignition end E2. The ignition end E1 is the end on which the combustion-type heat source 70 is provided. The non-ignition end E2 is the end on which the suction port 40 is provided. The suction port 40 is located at a place where the user holds the mouth in order to inhale the fragrance. The cylindrical retaining member 30 may also have, for example, a cylindrical shape or a square cylindrical shape. Preferably, the opening on the ignition end E1 side of the cylindrical retaining member 30 is blocked. In this embodiment, at least the inner retaining member 50 and the combustion-type heat source 70 block the opening on the ignition end E1 side of the cylindrical retaining member 30. In this way, the fragrance inhaler 10 is preferably constructed so that gas does not flow into the cylindrical retaining member 30 from the opening on the ignition end E1 side of the cylindrical retaining member 30.

The inner retaining member 50 is provided in the cylindrical retaining member 30. However, a portion of the inner retaining member 50 may also extend to the outside of the cylindrical retaining member 30. The inner retaining member 50 retains at least a portion of the combustion-type heat source 70 and at least a portion of the fragrance source 90. The inner retaining member 50 has a cylindrical first side wall 51 and an inlet 55. The first side wall 51 surrounds at least a portion of the fragrance source 90 and at least a portion of the combustion-type heat source 70. Alternatively, the first side wall 51 surrounds at least a portion of the fragrance source 90 without surrounding the combustion-type heat source 70. The inlet 55 is provided to introduce air into the fragrance source 90 in the first side wall 51. The inlet 55 may also be composed of a hole formed in the first side wall 51.

The combustion type heat source 70 is provided on the ignition end E1 side of the cylindrical retaining member 30. The combustion type heat source 70 is composed of a combustible substance. For example, the combustible substance includes a carbon material, a non-combustible additive, a binder (organic binder or inorganic binder) and a mixture containing water. As the carbon material, it is preferable to use a material from which volatile impurities are removed by heat treatment or the like. When the total weight of the combustion type heat source 70 is set to 100 weight%, the combustion type heat source 70 preferably contains a carbonaceous material in the range of 30 weight % to 70 weight %, and more preferably contains a carbonaceous material in the range of 35 weight % to 45 weight %.

The combustion-type heat source 70 is designed so that the portion on the ignition end E1 side burns, but the end on the non-ignition end E2 side does not burn. In other words, the end on the non-ignition end E2 side of the combustion-type heat source 70 constitutes the non-combustion portion, and the portion other than the non-combustion portion of the combustion-type heat source 70 constitutes the combustion portion.

The aroma source 90 is located inside the cylindrical retaining member 30, closer to the non-ignition end E2 than the combustion-type heat source 70. The aroma source 90 may also be adjacent to the combustion-type heat source 70. The aroma source 90 is configured to generate aroma without combustion. Specifically, the aroma source 90 generates aroma when heated by the combustion-type heat source 70.

Flavor source 90 can be, for example, tobacco raw material. In this case, flavor source 90 may include ordinary shredded tobacco used in cigarettes or granulated tobacco used in snuff. Flavor source 90 may also contain glycerin and/or propylene glycol in addition to tobacco raw material. Flavor source 90 may also include fragrances.

The cylindrical retaining member 30 includes a cylindrical second side wall 32 surrounding the first side wall 51 of the inner retaining member 50. The second side wall 32 may extend long from the ignition end E1 side toward the non-ignition end E2 side. The second side wall 32 may also include, for example, a paper tube formed by deforming a rectangular thick paper into a cylindrical shape.

At least the first side wall 51 of the inner retaining member 50 may also be formed of a heat transfer component. Furthermore, the inner retaining member 50 is preferably formed integrally with the heat transfer component. The thermal conductivity of the heat transfer component at room temperature is preferably 10 W/(m·K) or greater in the direction from the ignition end E1 toward the non-ignition end E2. The heat transfer component can be made of, for example, stainless steel. For example, SUS430 can be used. When the inner retaining member 50 is made of stainless steel, the thickness of the first side wall 51 of the inner retaining member 50 is preferably 0.1 mm or less.

The second side wall 32 of the cylindrical retaining member 30 may include a first heat transfer member 33 facing the inner retaining member 50. The first heat transfer member 33 is arranged so as to cover at least a portion of the first side wall 51 of the inner retaining member 50. The first heat transfer member 33 does not need to be in direct contact with the combustion-type heat source 70.

The first heat transfer member 33 facilitates heat transfer from the combustion-type heat source 70 to the fragrance source 90. The first heat transfer member 33 preferably extends closer to the non-ignition end E2 than the end surface of the inner retaining member 50 on the non-ignition end E2 side. The first heat transfer member 33 is preferably formed of a metal material with excellent thermal conductivity. The thermal conductivity of the first heat transfer member 33 is preferably higher than that of the first side wall 51. For example, the first heat transfer member 33 is formed of aluminum.

The second side wall 32 of the cylindrical holding member 30 has a through-hole 34 that is fluidly connected to the outside air. The through-hole 34 may be provided closer to the ignition end E1 than the end of the flavor source 90 on the non-ignition end E2 side.

A flow path forming member 60 is provided at least between the first side wall 51 and the second side wall 32. The flow path forming member 60 forms a first flow path 36 for allowing external air to flow to the fragrance source 90 within the cylindrical retaining member 30. Alternatively, the flow path forming member 60 may be formed by a member different from the first side wall 51 or the second side wall 32. Alternatively, the flow path forming member 60 may be formed by a member integrally formed with the first side wall 51 or the first side wall 32. The first flow path 36 connects the through-opening 34 of the second side wall 32 and the inlet 55 of the inner retaining member 50, and passes between the first side wall 51 and the second side wall 32.

The inner retaining member 50 may also have a heat transfer member (not shown) provided on the outer surface of the first side wall 51. The heat transfer member may also be configured in a manner that covers at least a portion of the first side wall 51 of the inner retaining member 50, as in the case of the first heat transfer member 33. The heat transfer member promotes heat transfer from the combustion-type heat source 70 to the fragrance source 90. The heat transfer member is preferably formed of a metal material with excellent heat conductivity, such as aluminum. In the case where the inner retaining member 50 has a heat transfer member adjacent to the outer surface of the first side wall 51, the first heat transfer member 33 may not be provided. In this case, the flow path forming member 60 may also be provided between the heat transfer member on the outer surface of the first side wall 51 and the second side wall 32.

A second flow path 38 is provided within the cylindrical retaining member 30 for directing the fragrance generated by the fragrance source 90 toward the inhalation port 40. The second flow path 38 connects the inhalation port 40, which absorbs the fragrance generated by the fragrance source 90, with the fragrance source 90. The inlet 55 of the inner retaining member 50 may also be located closer to the ignition end E1 than the through-opening 34 of the cylindrical retaining member 30. Furthermore, the first flow path 36 is preferably provided only at the end of the fragrance source 90 on the non-ignition end E2 side, closer to the ignition end E1.

During the inhalation action performed by the user, external air flows into the first flow path 36 from the through-hole 34 (arrow F1 in Figure 2). Then, the external air reaches the fragrance source 90 via the inlet 55 (arrow F2 in Figure 2). The external air passing through the first flow path 36 does not contact the combustion part of the combustion-type heat source 70, but reaches the fragrance source 90. The air reaching the fragrance source 90 passes through the second flow path 38 together with the fragrance and reaches the suction port 40 (arrows F3 and F5 in Figure 2). The fragrance source 90 is heated by the combustion-type heat source 70, and therefore, the gas flowing into the second flow path 38 through the fragrance source 90 becomes high temperature.

The cylindrical holding member 30 has a hole 39 (hereinafter referred to as a “vent”) for allowing external air to flow directly into the second flow path 38. Here, “directly flow” means that external air flows into the second flow path 38 without passing through the fragrance source 90.

The vent 39 may also be formed in such a manner that gas flows in a direction intersecting the direction in which the second flow path 38 extends (arrow F4 in FIG2 ). For example, the vent 39 allows gas to flow in toward the central axis of the second flow path 38 in a direction approximately perpendicular to the direction in which the second flow path 38 extends. A plurality of vents 39 are preferably provided at intervals along the circumference of the tubular retaining member 30. In this case, the intervals between the vents 39 may also be constant. The vent 39 may also be provided at the center CL of the tubular retaining member 30 relative to the direction in which the second flow path 38 extends, on the side opposite to the suction port 40. The vent 39 is preferably provided between the first heat transfer member 33 and the cooling layer 80.

Each of the plurality of vent holes 39 is preferably arranged at a position that is not opposed to another of the plurality of vent holes 39, and more preferably, is arranged at a position offset from a straight line connecting the other of the plurality of vent holes 39 and the central axis CA of the cylindrical retaining member 30 (see FIG3 ). In this case, no vent hole 39 is arranged on the opposite side of the vent hole 39 that sandwiches the central axis CA of the cylindrical retaining member 30. Furthermore, the plurality of vent holes 39 are preferably arranged at the same position relative to one another along the central axis CA of the cylindrical retaining member 30. However, the plurality of vent holes 39 may also be arranged offset relative to one another along the central axis CA of the cylindrical retaining member 30.

The cooling layer 80 is a layer that cools the aroma generated by the aroma source 90. The cooling layer 80 is provided on the inner surface of the cylindrical retaining member 30 and faces the second flow path 38. The cooling layer 80 is preferably located in at least a portion of the second flow path 38, surrounding the second flow path 38. The cooling layer 80 is preferably located only downstream of the aroma source 90. The thickness of the cooling layer 80 is preferably such that the fluid resistance of the second flow path 38 is not significantly increased. Although it depends on the diameter of the second flow path 38, the thickness of the cooling layer 80 is preferably not less than 5 μm and not more than 500 μm, for example. In addition, in the cross section of the cylindrical retaining member 30 perpendicular to the central axis CA, the ratio of the cross-sectional area of the cooling layer 80 to the cross-sectional area of the inner side of the inner wall of the cylindrical retaining member 30 is preferably not less than 0.2% and not more than 45%, and more preferably not less than 0.5% and not more than 5%. For example, in a cross section of the cylindrical retaining member 30 perpendicular to the central axis CA, the outer diameter of the cylindrical retaining member 30 may be 5 mm to 8 mm, the thickness of the cylindrical retaining member 30 may be 0.15 mm to 0.5 mm, and the thickness of the cooling layer 80 may be 0.05 mm to 0.5 mm.

In the first embodiment, the cooling layer 80 is provided only downstream of the vent hole 39. That is, the cooling layer 80 does not reach the upstream side of the vent hole 39. Alternatively, a portion of the cooling layer 80 may reach the upstream side of the vent hole 39. In other words, at least a portion of the cooling layer 80 only needs to be provided downstream of the vent hole 39.

The cooling layer 80 preferably has a length equal to or greater than half the length of the second flow path 38 in the direction in which the first flow path 38 extends. The cooling layer 80 is preferably separated from the first heat transfer member 33 constituting the cylindrical holding member 30.

Preferably, the cooling layer 80 defines a single passage within the cylindrical retaining member 30 for passage of the fragrance. More preferably, the interior of the cooling layer 80 is hollow. Here, "the interior of the cooling layer 80 is hollow" means that, apart from the filter 42 provided at the inlet 40, no other components exist within the cooling layer 80. In this case, the volume of the hollow portion within the second flow path 38 can be increased. In this embodiment, the cooling layer 80 defines a single passage within the cylindrical retaining member 30, and the interior of the cooling layer 80 is hollow.

In the first embodiment, the interior of the cooling layer 80 is hollow. Alternatively, any component may be disposed within the cooling layer 80 to a degree that does not significantly increase the flow resistance of the second flow path 38. For example, a cylindrical component may be disposed along the central axis of the second flow path. Another cooling layer may also be disposed on the outer circumference of the cylindrical component.

The cooling layer 80 may also include a second heat transfer component. The second heat transfer component may also be a metal. As an example, the cooling layer 80 may be composed of a metal tube. Alternatively, the cooling layer 80 may also be composed of a metal-laminated paper including paper and a metal layer laminated to the paper. As the above-mentioned metal, aluminum, for example, may be used. In addition, instead of these metals, the cooling layer 80 may also be a layer containing polylactic acid (PLA). In addition, the cooling layer 80 may also be formed of the same material as the first heat transfer component 33 constituting the cylindrical retaining member 30.

To increase the surface area of the cooling layer 80, the cooling layer 80 may also have a plurality of concave and convex portions. Such concave and convex portions can be formed, for example, by corrugating the surface of the cooling layer 80. These concave and convex portions can increase the heat exchange surface area of the cooling layer 80 without reducing the cross-sectional area of the second flow path 38.

(Function and Effect)

According to one embodiment, the fragrance inhaler 10 includes a cooling layer 80 located only downstream of the fragrance source 90. The cooling layer 80 is located on the inner surface of the cylindrical retaining member 30 and faces the second flow path 38. Since the cooling layer 80 facing the second flow path 38 is located on the inner surface of the cylindrical retaining member 30, there is no need to completely fill the interior of the cylindrical retaining member 30 with cooling components. If the interior of the cylindrical retaining member 30 were completely filled with cooling components, the ventilation resistance would increase, complicating the design of the ventilation resistance. In this embodiment, since there is no need to completely fill the interior of the cylindrical retaining member 30 with cooling components, the design of the ventilation resistance becomes simpler.

According to one embodiment, the cylindrical retaining member 30 has vents 39 that allow external air to flow directly into the second flow path 38, and at least a portion of the cooling layer 80 is disposed downstream of the vents 39. Gas passing through the fragrance source 90 is cooled by the external air flowing in through the vents 39 and then flows into the second flow path 38 facing the cooling layer 80. This improves the cooling efficiency of the gas passing through the fragrance source 90 and flowing into the second flow path 38.

According to one embodiment, the vent holes 39 are formed to allow outside air to flow into the second flow path 38 in a direction intersecting the direction in which the second flow path 38 extends. It has been confirmed that the cooling effect is exponentially enhanced by the inflow of outside air from the vent holes 39 and the cooling layer 80. This is because the flow of gas toward the non-ignition end E2 in the second flow path 38 (arrow F3 in FIG. 3 ) is disrupted by the outside air flowing in from the vent holes 39 (arrow F4 in FIG. 3 ), thereby generating turbulent flow. It is also considered that the flow of gas passing through the fragrance source may easily come into contact with the cooling layer 80.

According to one embodiment, the vent hole 39 is provided at the center CL of the cylindrical retaining member 30, on the side opposite the inhalation port 40, relative to the direction in which the second flow path 38 extends. By increasing the length of the second flow path 38 downstream of the vent hole 39, the cooling effect on the gas passing through the fragrance source 90 can be enhanced. Furthermore, by positioning the vent hole 39 farther from the inhalation port 40, the possibility of the user blocking the vent hole 39 with their fingers during a puff is reduced.

According to one embodiment, a plurality of vent holes 39 are provided at intervals along the circumferential direction of the cylindrical holding member 30. This allows the gas in the second flow path 38 to be uniformly cooled along the circumferential direction of the second flow path 38.

According to one embodiment, the cooling layer 80 is separated from the first heat transfer member 33. This allows the heat generated by the combustion-type heat source 70 to flow directly into the cooling layer 80. As a result, a decrease in the cooling effect of the cooling layer 80 can be suppressed. Furthermore, the heat generated by the combustion-type heat source 70 is efficiently transferred to the fragrance source 90.

According to one embodiment, the vent holes 39 are provided between the first heat transfer member 33 and the cooling layer 80. That is, the vent holes 39 are provided where the first heat transfer member 33 and the cooling layer 80 are not present. This has the advantage of making it easy to form the vent holes 39 in the cylindrical holding member 30.

According to one embodiment, the cooling layer 80 is formed of the same material as the first heat transfer member 33. Thus, the first heat transfer member 33 and the cooling layer 80 can be formed in the same process, and thus the manufacture of the flavor inhaler 10 is facilitated.

According to one embodiment, the cooling layer 80 defines a single passage for the passage of fragrance. According to another embodiment, the inner side of the cooling layer 80 is hollow. This allows for lower ventilation resistance compared to a method in which a cooling member, curled to form multiple passages, is inserted into the interior of the cylindrical retaining member 30.

According to one embodiment, the cooling layer 80 has a length equal to or greater than half the length of the second flow path 38 in the direction in which the second flow path 38 extends. This long cooling layer 80 can improve the cooling efficiency of the gas in the second flow path 38.

[Second embodiment]

Hereinafter, a flavor inhaler 10A according to a second embodiment will be described with reference to Fig. 4 . The same reference numerals are used for the same components as those in the first embodiment. Hereinafter, differences from the first embodiment will be mainly described.

In the second embodiment, the cylindrical retaining member 30 has multiple layers in the area where at least the second flow path 38 is provided. For example, the cylindrical retaining member 30 may include an outer wall portion 85 and an inner wall portion 84 provided inside the outer wall portion. The inner wall portion 84 may also be formed from a sheet material adhered to the inner surface of the outer wall portion 85. Alternatively, the inner wall portion 84 may be formed from a tube member inserted into the outer wall portion 85.

The cooling layer 80 is provided on the inner surface of the cylindrical retaining member 30, that is, the inner surface of the inner wall portion 84. In this way, the cooling layer 80 can also be provided on the inner surface of the cylindrical retaining member 30 having multiple layers. In this case, from the perspective of flow path resistance, the thickness of the cylindrical retaining member 30 and the thickness of the cooling layer 80 are preferably designed so that the cross-sectional area of the second flow path 38 is not too small. The cross-sectional area of the second flow path 38 in the cross section perpendicular to the central axis CA of the cylindrical retaining member 30 is preferably 5 ^mm2 or more and 50 ^mm2 or less, and more preferably 15 ^mm2 or more and 35 ^mm2 or less. For example, in the cross section perpendicular to the central axis CA of the cylindrical retaining member 30, the outer diameter of the cylindrical retaining member 30 may be 5 mm to 8 mm, the thickness of the cylindrical retaining member 30 may be 0.15 mm to 0.5 mm, and the thickness of the cooling layer 80 may be 0.05 mm to 0.5 mm.

[Other embodiments]

The present invention has been described with reference to the above embodiments, but the description and drawings forming part of this disclosure should not be construed as limiting the present invention. Based on this disclosure, various alternative embodiments, examples, and operational techniques will become apparent to those skilled in the art.

For example, the features described in the above-mentioned multiple embodiments can be combined as much as possible.

Industrial applicability

According to the embodiment, it is possible to provide a fragrance inhaler including a cooling layer with air flow resistance that is easy to design.

Claims (12)

1. A fragrance extractor, comprising: A fragrance source that produces fragrance without combustion; An inner retaining member has a first sidewall that surrounds at least a portion of the fragrance source and an inlet provided in such a way as to introduce air into the fragrance source within the first sidewall; A cylindrical retaining member having a second sidewall that surrounds the first sidewall and having a through-hole that fluidly communicates with the outside air; A flow path forming component is disposed between the first sidewall and the second sidewall; A first flow path, formed by the flow path forming component, connects the through-hole of the second sidewall and the inlet of the inner retaining component, and passes between the first sidewall and the second sidewall; The second flow path is located inside the cylindrical holding member and extends from the fragrance source to the suction port for absorbing the fragrance. A cooling layer is located only downstream of the fragrance source; The cooling layer is disposed on the inner surface of the cylindrical retaining member and faces the second flow path. The through-hole of the second sidewall and the inlet of the inner retaining member are separated from each other relative to the length axis of the fragrance extractor. 2. The fragrance extractor as described in claim 1, wherein, The cylindrical retaining member has a hole that allows external air to flow directly into the second flow path. At least a portion of the cooling layer is located downstream of the hole. 3. The fragrance extractor as described in claim 2, wherein, The hole is formed to allow external air to flow into the second flow path in a direction that intersects with the direction in which the second flow path extends. 4. The fragrance extractor as described in claim 2, wherein, The hole is located at the center of the cylindrical retaining member in the direction of extension of the second flow path, on the side opposite to the suction port. 5. The fragrance extractor as described in claim 2, wherein, The holes are arranged in a plurality of spaced intervals along the circumference of the cylindrical retaining member. 6. The fragrance extractor as described in claim 5, wherein, One of the holes is positioned off-center from the central axis connecting the other holes in the hole and the cylindrical retaining member. 7. The fragrance extractor as claimed in claim 1, wherein, It has a first heat transfer component that transfers heat generated by a combustion-type heat source disposed at the ignition end of the cylindrical holding component to the fragrance source. The cooling layer is separate from the first heat transfer component. 8. The fragrance extractor as claimed in claim 7, wherein, The cylindrical retaining member has a hole that allows external air to flow directly into the second flow path. The hole is located between the first heat transfer component and the cooling layer. 9. The fragrance extractor as claimed in claim 7, wherein, The cooling layer is formed of the same material as the first heat transfer component. 10. The fragrance extractor as claimed in claim 1, wherein, The cooling layer defines a single channel through which the fragrance can pass. 11. The fragrance extractor as claimed in claim 1, wherein, The inner side of the cooling layer is hollow. 12. The fragrance extractor as claimed in claim 1, wherein, The cooling layer has a length that is more than half the length of the second flow path in the direction in which the second flow path extends.