Heating unit for HNB-tobacco products and method for producing a heating unit
阅读说明:本技术 用于hnb-烟草制品的加热单元和用于制造加热单元的方法 (Heating unit for HNB-tobacco products and method for producing a heating unit ) 是由 J.迪克 U.霍伊泽 于 2018-08-02 设计创作,主要内容包括:一种用于HNB-烟草制品(10)的加热单元(13)包括烟草膜(20)和用于在不燃烧的情况下对所述烟草膜进行加热的电阻加热元件(18)。所述电阻加热元件(18)被集成到所述烟草膜(20)中并且/或者与所述烟草膜相连接并且由此形成至少一个烟草-加热器-复合元件(26)。(A heating unit (13) for HNB-tobacco products (10) comprises a tobacco film (20) and an electrical resistance heating element (18) for heating the tobacco film without combustion. The electrical resistance heating element (18) is integrated into the tobacco film (20) and/or connected thereto and thereby forms at least one tobacco-heater-composite element (26).)
1. Heating unit (13) for HNB-tobacco products (10), comprising
-a tobacco film (20), and
-an electrical resistance heating element (18) for heating the tobacco film without combustion,
characterized in that the electrical resistance heating element (18) is integrated into the tobacco film (20) and/or connected thereto and thereby forms at least one tobacco-heater-composite element (26).
2. The heating unit according to claim 1, characterized in that the resistive heating element (18) is an at least partially conductive fabric (31) or network structure.
3. The heating unit according to claim 2, wherein the textile (31) is used as a carrier material in the manufacture of the tobacco film (20).
4. The heating unit according to any one of the preceding claims, wherein the heating element (18) has a conductive weft as an electrical resistance heating conductor (24).
5. The heating unit according to any one of the preceding claims, wherein the heating element (18) has conductive warp yarns as supply conductors (23) for supplying the resistance heating element (18) with electricity.
6. The heating unit according to claims 3 and 5, characterized in that at least one supply conductor (23) is arranged along an edge of the fabric (31).
7. The heating unit according to claim 6, characterized in that the at least one supply conductor (23) surrounds the edge of the fabric (31) in a U-shape.
8. The heating unit according to any one of claims 5 to 7, characterized in that at least one of the supply conductors (23) is divided into two or more independently manipulable segments (27, 28).
9. The heating unit according to any one of the preceding claims, characterized in that the heating element (18) has non-conductive warp yarns (21) and/or non-conductive weft yarns (22) as support yarns.
10. The heating unit according to any one of the preceding claims, wherein the heating element (18) is added as a layer onto the tobacco film (20) such that the tobacco film (20) and the heating element (18) form a sandwich composite element (26).
11. The heating unit according to any one of the preceding claims, wherein the at least one tobacco-heater-composite element (26) is arranged in the heating unit (13) in a rolled and/or crimped manner.
12. The heating unit according to claim 11, characterized in that a plurality of tobacco-heater-composite elements (26A, 26B) are arranged, in particular concentrically, in the heating unit (13).
13. The heating unit according to claim 12, wherein the electrical contacts (30) of the plurality of tobacco-heater-composite elements (26A, 26B) are arranged at different, e.g. opposite, circumferential positions in the heating unit (13).
14. The heating unit according to any one of claims 11 to 13, wherein the tobacco-heater-composite element (26) or the tobacco-heater-composite element (26A, 26B) is held in the heating unit (13) by means of radial spacer shims (29).
15. HNB-tobacco article (10) having a housing (11) and a heating unit (13) according to any one of the preceding claims arranged in the housing (11).
16. Machine of the tobacco processing industry for embedding a tobacco-heater-composite element (26) into at least one wrapping web, characterized in that the tobacco-heater-composite element (26) is drawn off as a continuous web from a reel (43) and at least one wrapping web (42, 46) is pressed onto the continuous web (26) by means of at least one couch roll (44; 47).
17. Method for manufacturing a heating unit (13) for HNB-tobacco products, characterised in that the electrical resistance heating element (18) is used as a carrier material in the manufacture of the tobacco film (20) and/or is added as a layer onto the tobacco film (20).
Technical Field
The invention relates to a heating unit for an HNB-tobacco product comprising a tobacco film and an electrical resistance heating element for heating the tobacco film without combustion. The electrical resistance heating element is integrated in the tobacco film in a planar manner and/or is connected thereto and thus forms at least one tobacco heater composite element. The invention also relates to a method for producing a heating unit for an HNB tobacco product.
Background
For HNB (heat not burn) -products, tobacco or tobacco-containing material is heated and therefore releases aromatic substances and therefore the generated smoke without burning. Such HNB-articles have been proposed for a long time, see for example EP 0430559B 1. In this case, a column of a flavoring-producing medium, for example comprising tobacco, is arranged cylindrically around the rod-shaped heating element. The heating element is a resistance wire coil disposed in an insulating tube.
An alternative construction of HNB tobacco products is disclosed in WO 2013/131764 a 1. In this case, a smokable material, for example a tobacco mixture, is arranged in the chamber. A heater, such as a ceramic heater, an infrared heater or a resistive heater, is arranged cylindrically around the cavity.
In both of the arrangements described above, the tobacco material in contact with the heater is heated directly, but the material remote from the heater is heated only indirectly and with a delay. The resulting inhomogeneous temperature distribution is disadvantageous in view of the optimal release of active substance and aromatic substance and the reduced release of harmful substances.
Disclosure of Invention
The object of the present invention is to provide a heating unit which makes it possible to achieve a more uniform heating of a tobacco-containing material, and a method for producing said heating unit.
The invention solves this object with the features of the independent claims. The heating element is integrated into the tobacco film and/or connected to the tobacco film, whereby a compact composite structure is created between the heating element and the tobacco film. The resulting planar tobacco heater composite element, due to the direct, large-area contact between the heating element and the tobacco film, enables a direct, uniform and delay-free heat transfer from the heating element into the tobacco film, which in turn allows an optimal release of the active substance and the aromatic substance with a reduced release of harmful substances.
According to the invention, the heating unit does not need to be cleaned or replaced, thereby enabling improved hygiene and operability of the HNB-tobacco product.
By means of the advantageously provided resistance monitoring of the heating element, the maximum temperature of the product and thus its health aspects (avoidance of harmful substances due to overheating) can be better controlled and regulated.
Preferably the resistive heating element is an at least partially conductive fabric or network structure. The fabric composed of warp and weft yarns can be used as a carrier material in a tobacco heater composite element and impart mechanical stability and strength thereto. The textile is particularly advantageously used as a carrier material in the production of tobacco films. The production of the tobacco film can thereby be greatly simplified.
Alternatively, the heating element can be added as a layer to the tobacco film and connected thereto, such that the tobacco film and the heating element form a sandwich composite element. In one variant, the heating element can be applied to the tobacco film in the form of an equal or homogeneous coating, in particular by printing or spraying or as a conductive film. The conductive coating can then be brought to its final (heated) configuration in a second process step by an abrasion method. This can be achieved, for example, by means of laser engraving. Thus, a very fine and complex heating structure can be achieved while the heating element is very thin, which in turn achieves an optimal heat distribution.
In one embodiment, there can be direct contact between the tobacco film and the fabric.
Alternatively, the textile can be coated with an insulating material in an intermediate step, in order to achieve insulation between the tobacco film and the textile that is not chemically reactive. This is particularly relevant if the desired material for the heating element can react with the tobacco film in an undesired chemical manner. For the production, not only can the spraying process be used for applying the insulating material to the fabric, but also the network can be immersed in a bath of insulating material and subsequently dried. The tobacco-containing material can then be applied in a second process step in an impregnation or casting process with the network structure thus insulated, followed by a drying process. Impregnation is also advantageous if the net structure has been arranged in advance in a final shape, for example a cylindrical shape, and then stabilized by the impregnation method. The deformation before impregnation likewise has the following advantages: it is also possible to use an insulating material for the coating, which may become brittle after hardening.
The present invention is not limited to fabric-heating elements. For example, a plurality of resistance heating conductors can also be integrated into the tobacco film, in particular parallel to one another, or connected to it.
In one embodiment of the invention, the heating element has a conductive weft yarn as an electrical resistance heating conductor. This advantageously enables the heating element to be constructed as a textile fabric in a simple manner.
The heating conductor can generally be metallic, for example, designed as a heating wire, or be composed of another conductive material. The resistance heating conductor can also be formed in the form of a metallic coating or sheath of a textile or in the form of a yarn. Furthermore, carbon fiber based materials can be considered.
The heating element advantageously has conductive warp threads as supply conductors for supplying the resistance heating element, which makes it possible to supply the heating element with power in a simple manner. The supply conductors can preferably each be arranged along one edge of the fabric and preferably enclose this edge in a U-shape, whereby a reliable contact is produced between the supply conductors and the resistance heating conductors.
The heating element advantageously has non-conductive warp threads and/or non-conductive weft threads as supporting threads. The support yarns, which are made of a suitably strong material, give sufficient mechanical stability and strength to the heating element or the fabric.
It is possible within the scope of the invention for the fabric to be completely metallic and/or to be metal-coated. In this case it is a (fully) conductive fabric.
In an advantageous embodiment, at least one of the supply conductors is divided into two or more independently actuatable segments. In this way, for example, the respective segments of the tobacco film can be consumed sequentially. It is also possible in this way to provide a multi-cigarette product if a section of the tobacco film corresponds to the consumption of one cigarette.
The at least one tobacco-heater-composite element can advantageously be arranged in the heating unit in a rolled-up or crimped manner. In this way, an optimal utilization of the available installation space in the HNB tobacco product can be achieved. In one embodiment of the invention, a plurality of tobacco heater composite elements can be arranged in the heating unit with the same target setting, in particular concentrically. In this case, the electrical contacts of the composite element can advantageously be arranged at different, for example opposite, circumferential positions in the heating unit. This can help to homogenize the active substance component in the air flow.
Preferably, the at least one tobacco heater composite element is held in the heating unit by means of radial spacers, which represents a particularly simple design.
Drawings
The invention is explained below with reference to the drawings by means of preferred embodiments. Here:
figure 1 shows a schematic representation of a HNB-smoke product in longitudinal section;
figure 2 shows a perspective view of a heating unit for HNB-smoke products;
FIG. 3 shows a schematic view of a heating unit in cross-section;
FIG. 4 shows a schematic representation of a heating unit in longitudinal section or in side view;
figure 5 shows a schematic view of a HNB-smoke product in cross section in the region of a heating unit; and is
Fig. 6 shows a side view of a machine for embedding a tobacco heater composite element in at least one wrapping web.
Detailed Description
The
The
The
Fig. 2 shows an advantageous embodiment of a
The
Along the two longitudinal edges of the
The resistance of the
At least one of the
As can best be seen in fig. 4, the warp and
As can be seen in fig. 2 and 4, the
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An advantageous configuration of HNB-
The
In other embodiments, only one
Fig. 6 shows a side view of a machine 40 of the tobacco processing industry for embedding the tobacco heater