SK6402001A3 - System for supplying an inhalable aerosol - Google Patents

Abstract

A system for supplying an inhalable aerosol contains an inhaling device (10) which has a rod-shaped housing (12) with a rear, mouth-end area (16) and a front area (14). A substrate holder (26), which can be heated by a heating device (30, 38, 44, 50), is situated in the front area (14) of the housing (12) and is accessible via a loading opening (24) that is preferably located at the front end (23) of the housing (12). A flow channel (34) leads from the substrate holder (26) to the rear end of the housing (12). The heating device (30, 38, 44, 50) is configured for generating heat by thermal or catalytic combustion. A substrate portion (1) that is configured for introducing into the substrate holder (26) through the loading opening (24) contains aerosol-forming material inside a casing which has an air inlet and an aerosol outlet.

Description

System for the preparation of an inhalable aerosol

Technical field

The invention relates to a system for the preparation of an inhalable aerosol as well as to components of such a system. This system is particularly suitable as a smoking need for the preparation of a smoking aerosol for smokers

BACKGROUND OF THE INVENTION

When smoking conventional cigarettes, the largest proportion of tobacco is not burnt during strokes, but at breaks between strokes. This leads to the formation of a so-called by-stream of smoke, which is often perceived as annoying by non-smokers.

Numerous new smokers have been proposed to overcome this problem. The common principle of such trends is that not heat from the combustion of tobacco, but other energy sources are used to release the smoke aerosol. This significantly prevents by-pass smoke. Substitute materials such as specialty foil tobacco or flavored substances which are impregnated with carrier materials are widely used in the proposed smoking articles to generate an aerosol.

U.S. Patents 5,060,666, 5,067,499, and 5,099,861 disclose cigarette-like smokes in which the thermal energy of a glowing coal element is transferred to an aerosol-generating material which, in addition to tobacco or tobacco extracts, contains flavorings and aerosol-forming substances such as glycerin. Here, the combustion gases of the heating element are inhaled with a fume aerosol, which leads to increased carbon monoxide capture by the smoker. Furthermore, the entire smoking system must be disposed of after smoking, resulting in an increased onslaught of complex compound residues and the associated disposal problems.

··················································································· ··· ·· ··· ·· ·

Also known are devices in which a dose of substrate is heated by electrical energy to release a fume aerosol. Such a device, which must be held in the hand and, due to its size and weight, cannot be kept in the mouth, is described in U.S. Pat. No. 4,141,369. Other smoking articles similar to cigarettes in which special substrates with tobacco flavor are electrically heated battery current while emitting an inhalable aerosol are disclosed in U.S. Patents 5,095,921, 5,179,666, and 5,269,327. A cigarette for an electrically heated smoking system is U.S. Pat. No. 5,499,636. However, all of these means are relatively heavy and inconvenient.

U.S. Pat. No. 4,474,181 discloses smoking aids in which nicotine and tobacco-simulating substances are heated and inhaled using, for example, combustible cellulose foams.

WO 97/48294 discloses another system for the preparation of an inhalable aerosol. In this case, there is a burner and a heating means reservoir in the housing to be held in the hand, which comprises heating means for operating the burner. The rising hot combustion gases flow through a heat exchanger in which the ventilation ducts are located. The ventilation ducts are connected at one end to the outside air and at the other end into a tubular flow duct extending from the upper region of the housing, which is formed as a mouthpiece at its free end. The middle section of the flow passage is filled with a dose of substrate which is indirectly heated by the air sucked by the user and heated by the heat exchanger to release the aerosol. Also, this system is relatively heavy and uncomfortable and must be opened to insert a new dose of substrate.

SUMMARY OF THE INVENTION The object of the present invention is to provide a lightweight, convenient and user-friendly inhalable aerosol preparation system which comprises a reusable inhalation device, and can in particular serve as a smoker which provides a similar taste to conventional cigarettes. no by-pass smoke ··· ··································· ·······························

SUMMARY OF THE INVENTION

This object is achieved by a system with the features of claim 1 having an inhalation device with the features of claim 26 and a dose of substrate with the features of claim 28. Preferred further embodiments of the invention result from the dependent claims

The system according to the invention for the preparation of an inhalable aerosol has an inhalation device having a rod-shaped housing with a rear region located from the mouth and a front region. In the front region of the housing there is a substrate holder heatable by means of a heating device, which is accessible via an insertion opening preferably located on the front side of the housing. A flow channel extends from the substrate holder to the rear end of the housing. The heating device is adapted to generate heat by thermal or catalytic combustion, preferably in the rear region of the housing there is a reservoir for the heating means. The system further comprises a dose of substrate that is adapted to be inserted into the substrate holder through the insertion opening and which within the package having an air inlet and an aerosol outlet includes an aerosol-forming material.

Since the energy required to heat the aerosol is taken from the gaseous and / or liquid heating means, an inexpensive and readily obtainable energy carrier of high energy density is available. Therefore, the inhalation device itself, if it contains a full reservoir for the heating means, can be constructed very simply and conveniently so that it can be held in the mouth by the user without a problem. In doing so, the rod holder is well held in the hand and gives the user an approximate sense of smoking a cigarette with a cigarette mouthpiece or a cigar. A substrate dose is inserted in the front region of the rod housing into the heatable substrate holder, namely through an insertion opening, preferably located on the front side of the housing. This reinforces the feeling that a cigar or cigarette with a cigarette mouthpiece is used. The substrate dose is heated through a heatable substrate holder to release an inhalable aerosol which is passed through the flow passageway to the rear end of the housing.

In the rear region of the housing, the inhalation device may have a mouthpiece which is connected to the flow passage and is preferably poorly thermally conductive so that the user does not come into contact with uncomfortably high temperatures. Instead of a mouthpiece, it is also conceivable to insert a filter, designed as a mouthpiece with a filter, into the back region of the housing into the flow channel. In one variation, the filter is disposable into the flow channel at another location; such an embodiment can also be used in connection with a fixed mouthpiece.

In one preferred embodiment, the substrate holder of the inhalation device has at least one heating surface, which is preferably in the form of a hollow cylinder or ring. For example, the substrate holder may have two heating surfaces parallel to one another, the spacing of which is preferably adjustable. In this case, it is conceivable that the distance adjustment is preferably carried out automatically depending on the temperature, for example by means of a bimetallic strip. In one preferred embodiment, the substrate holder of the inhaler device within the heating surfaces preferably has an aperture equipped with a heat-well-apertured aperture that is adapted to abut a dose of substrate inserted into the substrate holder. These exemplary embodiments provide good thermal contact, either directly through the heating surfaces or through the heat-distributing jacket between the heating surfaces and the substrate feed zone located in the heating surface area. However, the heating surfaces or the sheath need not touch the substrate doses directly; examples are also conceivable in which the distance to the substrate dose is considered and the heat transfer is effected, for example, by radiation.

Preferably, the substrate holder of the inhalation device has a rear cavity behind the heating surfaces into which the rear region of the intermediate dose of substrate is inserted. This embodiment allows the user to heat the dose of substrate in certain sections and inhale the released aerosol. In doing so, the user slowly shifts the substrate dose, preferably after each stroke, a little further backward, wherein the consumed portion of the substrate dose is retained in the rear cavity until the entire substrate dose is consumed or smoked. In order to prevent the substrate dose from sliding too far into the housing of the inhalation device, a stop for the substrate dose may be located at the rear end of the rear cavity.

In one preferred embodiment, the heating surfaces of the inhalation device are configured to be heated by means of a catalytic incinerator. • · · · · kat · kat · · · · · · · · The gas and / or liquid heating means are heated. Catalytic combustion avoids the difficulty of guiding the flame of the heating device, which is in favor of a compact design.

Advantageously, the externally refillable heater means reservoir can be located in the rear region of the inhalation device. Alternatively, it is also conceivable to insert a replaceable heater means cartridge into the housing. Suitable heating means are conventional combustible substances which may be liquid or gaseous at room temperature, as detailed in the claims.

The inhalation device may have a trigger device that is connected to a preferably piezoelectric ignition device for igniting the heating means, and a ventilation device for releasing the heating means from the heating means reservoir. In one preferred embodiment, the actuating device is formed mechanically and has an axially displaceable, preferably poorly conductive ring, which is preferably fixed in two positions, axially on the front region of the housing of the inhalation device. Thus, for example, the piezoelectrically inducible ignition process may be caused by displacement of the ring while simultaneously opening the ventilation device to release the heating means for catalytic combustion; then the ring for rotation is rotated, leaving the ventilation device open and the heating process lasting. If there is enough time, for example, after the thrust is complete, the user can unlock by rotating the ring back and move it back to its initial position, which is preferably done with spring support, so that the ventilation device is closed again and the heating process is complete.

Preferably, the front housing area of the inhalation device has air access openings for supplying combustion air to the heating device. Combustion gases emanating from the heating device, which is essentially carbon dioxide and water, in one preferred embodiment of the invention reach the inhaled aerosol, whereby good air, combustion gases and aerosol conduction are achievable by the user's strokes. small quantity ······························································································ ··· ···· ··· ·· ··· ·· ··· harmful substances, such as carbon monoxide, that it is harmless. In a further preferred embodiment of the invention, on the other hand, the combustion gases are protected from the inhaled aerosol.

In one preferred embodiment, the housing of the inhalation device has a window in front of the component during operation of the heating device illuminating, for example, the heating surface. The user can then easily check the operating status of the inhalation device.

The housing of the inhalation device may be made in one or more parts. In the latter case, it is preferably in two parts and has a releasable joint, for example in the central region between the front housing region in which the heatable substrate holder is located and the rear housing region in which the heating means container is located. On the releasable connection, the housing may be opened, for example for cleaning purposes. The housing material of the inhalation device should be heat resistant. Thus, thermoplastics, multi-component plastics, hardwoods, noble woods, root wood and / or metal are suitable.

The substrate dose preferably has a cylindrical shape, the wrapper being positioned as a cylindrical shell, and the faces of the cylinder being configured as an air inlet and an aerosol outlet. In this case, the container is preferably low pore to air impermeable to prevent the by-pass smoke flow. In its forward region, the substrate dose has an insulating envelope that preferably projects beyond the front end of the package to prevent the user from coming into contact with the substrate dose. with hot surfaces. The aerosol-forming substrate dose material has a very inert carrier material or tobacco material and additional ingredients. Preferably, the material contains a higher proportion of polyalcohols which serve as aerosol sources. It is also conceivable that the substrate dose is a thin, commercially available, non-filter cigarette having polyalcohols having a 5 wt. Details of possible embodiments of the substrate dose are set forth in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is described and explained in more detail below with reference to the accompanying drawing, in which: FIG. 1 is a schematic longitudinal section through a system for the preparation of an inhalable aerosol, in the form of a smoking device in which a dose of substrate is inserted into the inhalation device, and

Fig. 2 shows a longitudinal section through a dose of substrate.

DETAILED DESCRIPTION OF THE INVENTION

In FIG. 1 illustrates how substrate dose 1 is placed in an inhalation device that serves as a smoking aid. Fig. 2 shows substrate substrate 1 more accurately. In this exemplary embodiment of the substrate dose 1, the aerosol-forming material 2 is located within the cylindrical container 3. The container 3 leaves the cylinder faces free so that an air inlet 4 and an aerosol outlet 5 are formed there.

The aerosol-forming material 2 may be, for example, cut leaf tobacco, cut coarse tobacco for smoking pipes, reconstituted tobacco, or a carrier material with aromatic substances. The use of leaf tobacco and coarse tobacco slices may also be performed in an expanded form. As flavor carrier materials, both organic materials such as paper or cellulose fibers as well as inorganic materials such as silica gel can be used. Any mixtures of the above components may also be used. Numerous components and components for the aerosol generating material are disclosed in the claims, so that numerous variants are conceivable

To promote aerosol formation, the aerosol generating material 2 preferably comprises a high proportion of polyalcohol or multiple polyalcohols, for example glycerin and / or propylene glycol, for example using substantially inert carrier materials such as aluminum oxide, silica gel, activated carbon, cellulose fibers, lignin granulate, % zeolites, clays or sea foam, or combinations thereof in the range of 10 wt. When using tobacco materials, a proportion of polyalcohols of 10% by weight is preferred. up to 40% by weight Another possibility of promoting aerosol formation is the use of aerosol-forming materials with moisture levels well above equilibrium moisture; for example, tobacco having an equilibrium moisture content of about 10% to 12% can be used with a moisture content of 20%. In this case, care should be taken to ensure that there is no loss of moisture until the time of use.

The wrapper 3 may consist of paper, plastic film or metal foil. Multilayer packagings of the aforementioned components are also useful. However, a single-layer wrapper of paper or metal-coated paper is preferred. Particularly preferred is a low porous or nearly air impermeable cigarette paper, which preferably has a high proportion of mineral additives. This ensures that bypass heating of the substrate is practically free of by-pass smoke.

In one preferred embodiment, the substrate dose 1 in its front region, i.e. in the region of the air inlet 4, is surrounded by an additional insulating envelope, in FIG. 1 and FIG. This insulating cover ensures that the user does not touch unpleasantly hot surfaces if he / she pushes the substrate dose 1 into the inhalation device deeper during smoking, see below.

It is also conceivable to use as a substrate dose a thin, commercially available, non-filter cigarette having polyalcohols having a 5 wt. up to 10% by weight.

Two further examples of substrate dose adjustment 1 are described below.

Example 1

The American-Blend tobacco blend containing 30% Burley tobacco, 40% expanded Virginia tobacco, 20% unexpanded Virginia tobacco, and 10% Orient tobacco was conditioned and sprayed with 12% by weight of an aqueous substance containing 80% by weight glycerine. Subsequently, the tobacco was cut. to a cutting width of 0.8 mm and dried to a moisture content of 12%. 180 kg of this cut tobacco ·································· Was mixed with 20 kg sections of expanded coarse tobacco for pipes. From this mixture, an endless strand having a diameter of 5 mm and a fabric density of 200 mg / ml was made on a cigarette twine machine. Aluminum-laminated, air-impermeable paper was used on the outside as the packaging material. The endless strand was cut into individual batches of 40 mm in length

Example 2

Paper foil tobacco having a propylene glycol content of 12% by weight, made according to the known method, was cut with a cutting width of 0.8 mm and, as in Example 1, fed to a cigarette twine machine and wrapped therewith with cigarette paper, the cigarette paper having air permeability 5 CU. Cutting an endless strand with a diameter of 6 mm yielded substrate lots of the appropriate length of 50 mm; the substance density was 240 mg / ml.

In principle, it is also conceivable to use a dose of substrate which is equipped with a commercial filter downstream of the aerosol outlet opening. However, it must be ensured that, when such a dose of substrate is inserted into the inhalation device, the filter 2 is not heated but the aerosol-forming material 2 upstream of the filter.

Fig. 1 shows a schematic longitudinal section of an embodiment of an inhalation device 10. The inhalation device 10 has a rod-shaped or cigarette-shaped housing 12 with a front area 14 and a rear area 16 located on the mouth side. The rear end portion of the rear region 16 is formed as a mouthpiece 18, see FIG.

The housing 12 preferably consists of a heat-resistant material such as thermosetting, a multi-component plastic, hardwood, noble wood, root wood or metal, or a plurality of materials of this kind. In order to prevent the user from coming into contact with hot surfaces, critical points are provided with thermal insulation or consist of heat insulating materials.

·································································· ··· ·· ··· ·· ·

In the exemplary embodiment, the housing 12 is formed in two parts, wherein the front region 14 and the rear region 16 may be joined together by means of a joint 20. At the joint 20, the front region 14 and the rear region 16 of the housing 12 may be pushed into each other. . 1, in which it engages the projection in the groove, secures a defined position of the rear region 16 relative to the front region 14, and prevents roll-over. The locking ring 22 significantly prevents heat transfer from the front area 14 of the housing 12, in the heated state, to the rear area 16 with the mouthpiece 18. When the housing 12 is in the connection 20 opens, the inhalation device 10 can be cleaned

On the front side 23 of the housing 12 there is an insertion opening 24 through which the substrate dose 1 can be inserted into the interior of the cartridge 12. The substrate holder 26 has a guide sleeve 28 adapted to the outer diameter of the substrate dose 1. a heating surface 30 formed as a hollow cylinder in the exemplary embodiment is located by the sleeve 28. Downstream of the heating surface 30, the substrate holder 26 has a rear cavity 32 into which the rear region of the intermediate dose of substrate 1 is inserted.

The axially disposed flow passage 34 extends over the entire length of the rear region 16 of the housing 12 and extends from the rear cavity 32 to the rear end of the mouthpiece 18.

The heating surface 30 is a component of a heating device for heating the substrate holder 26 operating in the exemplary embodiment as a flame-free heater catalyst. In this case, the combustion air for the operation of the heating device can enter through the air inlets 36 in the front region 14 into the housing 12. If the heating surface 30 is at a high temperature, it heats the zone of the substrate dose 1 located in its region. Thus, in the exemplary embodiment, if the heating surface 30 is formed as a hollow cylinder, it heats the substrate dose area 1 located just in its interior space. In an exemplary embodiment, the inner diameter of the heating surface 30 is greater than the outer diameter of the substrate dose 1. In this case, the heat is transferred from the heating surface 30 to the substrate dose 1, in particular by radiation. The heating surface 30 can also be designed to transport heat by means of a conduit. Heat In this case, it is preferable that the heating surface 30 of the substrate 1 charge is immediately but if there is a jacket within the heating surface 30, preferably provided with openings which consist of a heat-dissipating material such as aluminum and which is sized to fit substrate 1, so that it preferably fits directly onto substrate 1, FIG. 1 is not shown. Numerous variants are conceivable to form the heating surface 30. A plurality of heating surfaces, for example two heating surfaces parallel to one another, may also be provided, or other shapes, such as a channel-shaped profile, may be selected for the heating surface. Essentially, the heating surface 30 causes the zone of substrate dose 1 located in its region to be heated through the outside of substrate dose 1, i.e. direct heating, as opposed to indirect heating in which heated gas, in particular air, is passed through dose 1. substrate.

The heating means necessary for operating the heating means, for example gas butane, pentane or isopropanol, is located in the heating means reservoir 38, which is located in the rear region 16 of the housing 12. The heating means reservoir 38 can be refilled by an outwardly extending filler neck. 40, which is provided with a closure. In the exemplary embodiment, the heating means reservoir 38 is annular, with the flow passage 34 extending through its axial region. Instead of the refillable heater cartridge 38, a heater cartridge may also be provided, formed as a refill cartridge, which as a whole is inserted into the rear region 16 of the housing 12. Alternatively, it is conceivable to design the entire rear region 16 of the housing 12 as a disposable device that is replaced. when the heater container 38 is empty.

In order to bring the heating means from the heating means reservoir 38 to the heating surface 30. a valve 42 must be opened which opens into a heating means guide 44 which is connected to the heating surface 30. Because in the exemplary embodiment, the front region 14 may be from the rear region. 16 of the housing 12, the heating means guide 44 must also have a partition which is formed as a sealed coupling 46.

· · • · · ···· 99 • • · · · • • • 9 • · · • • • · · · · • • • • • • · • • 9 • • • • • • • 9 • • • ···· · · · · · 999 · · ·· ·

A mechanical actuator having an axially displaceable, poorly thermally conductive ring 48 on the front region 14 of the housing 12 serves to ignite the heating means and to actuate the valve 42. On its outside, the ring 48 is provided with a gripping surface. If the ring 48 is inserted rearward, that is, in the direction of the arrow shown in FIG. 1, the valve 42 opens so that the heating means can flow from the heating means reservoir 38 to the heating surface 30 and at the same time control the piezoelectric lighter 50, which causes catalytic combustion of the heating means. In the rearwardly displaced position, the ring 48 can be locked by rotation. The valve 42 remains open in this position of the ring 48 so that catalytic combustion continues and the heating surface 30 transfers heat, even though the lighter 50 is not active during this time. If the heating process is to be completed, the ring 48 is rotated in the opposite direction and locked forward. In this case, the valve 42 is closed. 1, not shown, ring 48 facing forward. The mechanical components for actuating the valve 42 and the lighter 50 are not shown in FIG. 1.

If the user wishes to use the inhalation device 10, he will first insert a fresh dose of substrate 1, for example a special thin cigarette with a diameter of 5 mm and a length of 40 mm, through the insertion opening 24. first pull, pulls the ring 48.

on mouthpiece 18 and locks it by turning. As already explained, the heating means flows to the heating surface 30 and ignites. Due to the heat given off during the catalytic combustion, the substrate dose zone 1 in the region of the heating surface 30 is heated, so that the aerosol-forming material 2 releases the flavor aerosol. When the user draws on the mouthpiece 18, air enters the air inlet 4 into the substrate dose 1 and delivers the flavor aerosol through the aerosol outlet 5 of the substrate dose 1 through the flow channel 34 to the user. Advantageously, additional air to be diluted is added through the air access openings 36 The inhaled aerosol further comprises, in an exemplary embodiment, carbon dioxide and water vapor from the catalytic combustion of the heating means. In the case where the housing 12 has a window, in FIG. 1 (not shown) which allows the user to view the heating surface 30, so that it 13

·· · · · ···· ·· · • · · · • • • • · • · • • • • · · · • · • • • in · • • · • · • • • • • • • · • ·· · · · · · · · · · · · · ·· ·

said that the heating surface 30 glows red upon ignition, and then when it draws on the mouthpiece 18, it changes its color to light red.

Prior to making another thrust, the user moves the substrate dose 1 a little to the mouthpiece 18. At the same time, the rear, smoking zone of the substrate dose 1 enters the rear cavity 32. while the fresh zone reaches the area of the heating surface 30. to the user a fresh taste aerosol. In order to save the heating means and to prevent the by-pass smoke flow, the user can unlock and move the ring 48 after each stroke in an upstream direction so that the valve 42 closes. The last stroke is performed when substrate substrate 1 abuts against the insulating ring 22. Subsequently, the user can withdraw and remove the substrate dose 1 through the insertion opening 24 from the housing 12.

In the described embodiment of the inhalation device 10, the user, due to the coating on the mouthpiece 18, ensures the necessary air flow through the air inlets 36 during catalytic combustion to the heating surface 30 as well as through the air inlet 4 into the substrate 1 and through the dose 1. The combustion gases resulting from the catalytic combustion are sucked into the flow channel 34 and added to the inhaled aerosol, as mentioned above. this method of conducting the gas and aerosol is acceptable.

However, it is also possible to protect the combustion gases from inhaled aerosol. For this purpose, for example, an open sleeve of heat-dissipating material can be arranged at both ends inside the heating surface 30, which connects the guide sleeve 28 to the rear cavity 32. so that the combustion gases have no access to the flow passage 34. per dose of substrate 1. In this exemplary embodiment, the wall of the housing 12 must have at least one combustion gas outlet port. The desired flow from the air inlet ports 36 through the heating surface 30 to the outlet port can be achieved by thermic temperature gradient.

Claims (7)

PATENT CLAIMS • · · · · · · 9 · 9 9 9 9 9 9 9 9 • • ··· · · A system for the preparation of an inhalable aerosol, comprising an inhalation device (10) having a rod housing (12) with a rear region (16) positioned from the mouth and a front region (14), wherein in the front region (14) of the case (12). a substrate holder (26) heatable by a heating device (30, 38, 44, 50), which is accessible through the insertion opening (24), is preferably located on the front side (23) of the housing (12) and away from the holder (26) of the substrate leads to a flow passage (34) at the rear end of the housing (12), and the heating device (30, 38, 44, 50) is adapted to generate heat by thermal or catalytic combustion, wherein in the rear region (16) of the housing (12) of the device (10), there is placed a reservoir (38) for the heating means, which is preferably refillable from the outside, and the inhalation device (10) has a triggering device (48) which is in operative connection with the ignition device (50), preferably piezoelectric, for igniting the heating means, and a ventilation device (42) for releasing the heating means from the heating means reservoir (38), and further comprising a substrate dose (1) insertable into the substrate holder (26) through the insertion opening (24) comprising, within the container (3) having an air inlet (4) and an aerosol outlet (5), an aerosol-forming material (2), characterized in that the triggering device (48) has an axial a displaceable, preferably poorly thermally conductive ring (48) which is preferably fixed in two positions, on the front region (14) of the housing (12) of the inhalation device (10). · · • · · ···· · · • • · · · • • • • • • · • • • • · · · • • • • • • · • • · • • • • • • • • • • • ···· · · · · · · · · · · · · · System according to claim 1, characterized in that a filter can be inserted into the flow channel (34) of the inhalation device (10). System according to claim 2, characterized in that in the rear region (16) of the housing (12) of the inhalation device (10), a filter insertable as a mouthpiece with a filter can be inserted into the flow channel (34). System according to claim 1 or 2, characterized in that the inhalation device (10) has a mouthpiece (18) in the rear region (16) of the housing (12), which is connected to the flow channel (34) and is preferably poorly thermally conductive. . System according to one of claims 1 to 4, characterized in that the substrate holder (26) of the inhalation device (10) has at least one heating surface (30), which is preferably in the form of a hollow cylinder or ring. System according to one of claims 1 to 5, characterized in that the substrate holder (26) of the inhalation device (10) has two heating surfaces arranged parallel to one another, the spacing of which is preferably adjustable System according to claim 5 or 6, characterized in that the substrate holder (26) of the inhalation device (10) has a well thermally conductive jacket within the heating surfaces (30), preferably provided with apertures, interposed with the substrate dose (1). into the substrate holder (26)