WO2024184818A1 - Flavour enhancer for a shisha - Google Patents

Abstract

The invention relates to a flavour enhancer for a shisha pipe and similar aerosol-forming devices, allowing considerable improvement in the flavouring of the vapour or smoke. In addition to a flavour carrier, which can be variously configured and can contain assorted arms, the flavour enhancer according to the invention has for example a connection to the hose of a shisha and also a mouthpiece. Other ways of using the flavour enhancer described are possible and described in detail.

Description

Aroma booster for a shisha

Field of the invention

The invention relates to an aroma booster for a shisha pipe - also known as a water pipe - and similar aerosol-forming devices, which enables a significant improvement in the aromatization of the aerosol (steam or smoke). The aroma booster according to the invention has a hollow body with an aroma carrier and contains, for example, a connection to the hose of a shisha and a mouthpiece.

Background of the invention and prior art

Smoking shisha has become increasingly popular in western countries in recent years. In many cities there are cafes and bars that sell shisha pipes and the corresponding tobacco.

The shisha is a water pipe that has been around since at least the 16th century and first spread in India and large parts of the Arab world. In many Arab countries the shisha is an integral part of the culture; smoking together was and still is seen as a symbol of hospitality. This culture also reached western countries through holidaymakers and migrants.

Structure, components and functionality of the Shisha

The structure, components and functionality of a shisha can be described as follows. A shisha contains a water-filled vessel, the so-called bowl. A so-called smoke column with Dip tube. The smoke column with dip tube is screwed onto the bowl. The bowl is filled with enough water so that after the smoke column is screwed on, the dip tube protrudes into the water. The shisha head and a charcoal carrier are placed on the upper end of the smoke column. The shisha head together with the charcoal carrier is also called the head structure. The shisha head is filled with shisha tobacco or the alternative carrier material described in DE102020002624A1. The charcoal carrier has one or more openings for the air flow, which basically act like a sieve. The sieve-like charcoal carrier is filled with charcoal and placed on the shisha head.

Above the water level on the bowl there is an opening into which a hose with a mouthpiece can be inserted. When the mouthpiece is pulled, a vacuum is created in the bowl. This vacuum creates a flow of air which heats up over the coal and is then drawn over the tobacco or carrier material into the bowl. The glycerine-flavour mixture with which the tobacco or carrier material is soaked evaporates and ultimately reaches the consumer's lungs via the smoke column, bowl, hose and mouthpiece. Normal bowls have several openings which enable several hoses to be connected so that several people can use the shisha together.

The difference between vaping and smoking in the shisha

If smoke particles, volatile hydrocarbons or even polycyclic carbons are created when the ash falls down, this is called shisha smoking. When using tobacco, the production of smoke is practically unavoidable.

If the mist consists only of liquid droplets then it is called Shisha vapor. The previously mentioned state The alternative carrier substance described in the technology allows such vaping without the creation of smoke particles.

In the context of the present invention, the terms "smoking" and "vaping" are used predominantly synonymously. The device according to the invention can be used advantageously in both types of use.

Preparing the tobacco

A special, very "moist" tobacco is generally used for the shisha, which is difficult to ignite due to its "moisture". Glycerine is the main humectant for the hookah tobacco. Depending on the recipe, honey or various types of sugar and flavorings are usually added to this. There are hundreds of flavors that can be added, but at the moment additions to the basic flavors of menthol, mint and mint oil as well as eucalyptus are very popular. Classics that are popular everywhere are Ice Grape, Double Apple, and Ice Apple. The flavorings are usually dissolved in propylene glycol.

Alternatively, a moist carrier material is used, as described in WO2021/220255A2. In this case, too, glycerine is used as a moistening agent, to which flavors are added. The same flavors can be used as for shisha tobacco.

Depending on the amount of tobacco or carrier substance in the shisha head, the shisha can be smoked for around 30 - 45 minutes. Experience has shown that the aroma of the vapor/smoke typically diminishes significantly after 30 minutes, and after 60 minutes at the latest, no aroma is perceptible anymore. Basic features of the invention and preferred embodiments

The present invention is therefore based on the object of providing a novel aroma booster for aerosol-forming devices, for example a shisha, for the perfectly coordinated combination of an aroma-free aerosol and an aromatizing element, so that a perfect combination can be adjusted for each aroma and aerosol-forming carrier substance.

The aroma booster consists of an elongated hollow body, which is attached to a hose of the shisha, for example, so that the steam escaping from the shisha can be guided through the hollow body. The other end of the hollow body is shaped into a mouthpiece, for example, through which the user can suck in the steam. Inside the hollow body there is a chamber for holding an aroma carrier.

In other embodiments of the invention, the aroma booster can also be positioned at other locations between the aerosol formation and the consumer, for example between the aerosol outlet from the bowl and the hose with mouthpiece.

In a first embodiment of the invention, the aroma carrier consists of a substantially cylindrical cotton roll. Suitable for this application are, for example, cotton rolls such as those used by dentists. These have a diameter of between 0.8 and 1.2 cm and are four centimeters long.

In other embodiments of the invention, other

Materials used . These can include natural

Materials such as cellulose or cotton, modified natural materials such as cellulose acetate or artificial Materials, preferably polymers, such as elastane, PET, polyamide, polyacetate, ethylene-vinyl acetate (EVA), polyolefins, polycondensates, polyurethanes or similar polymer materials and their mixtures are mainly used in foam-like designs. These can be produced, for example, by processes such as plastic foaming, foam extrusion, molding processes, MuCell processes, RRIM (Reinforced Reaction Injection Molding, PUR foaming, thermoplastic foam molding processes (TSG). Other alternative materials are silica gel, which can absorb large amounts of liquid and also has an extremely large surface area (up to 600m ² /g). Mineral materials that can absorb liquids, such as zeolite, montmorillonite, smectite or pumice, should also be mentioned. The material can also be designed as a porous or fibrous body with continuous capillaries. Within the scope of the present invention, several different materials can also be mixed.

The material selected must be able to absorb the aroma solution described below and release it effectively to the surface of the aroma carrier. Furthermore, the material must be able to quickly replace aroma released at the surface by diffusion from the interior.

As already mentioned above, the aroma carrier can be cylindrical in the simplest case. Alternatively, the aroma carrier can also be designed in the form of a hollow cylinder (Figure 5 CA). Alternatively, the cylinder can also have several holes (Figure 5, CB). The aroma carrier can also be designed in the form of a prism, with a cross-section that can be polygonal (eg three-, four-, six- or eight-sided) (see Figure 4). A Aroma carriers can also have channels, depressions and/or elevations on the surface in order to increase the contact areas. Aroma carriers made of sponge-like polymer material (Fig. 5, CG, CD, CE) can also be designed in these shapes. Other possible shapes are disclosed in the figures.

Typically, the aroma carrier has a volume of 0.5-20 cm ³ and a surface area of 4-45 cm ² . In many cases, the aroma carrier is cylindrical and has a length of 1-6 cm and a diameter of 0.5-2 cm. In special cases, smaller or larger aroma carriers can also be used.

The aroma carriers, for example the cotton rolls mentioned above, are secured by suitable holding devices in the chamber inside the mouthpiece so that they do not change their position and in particular cannot be sucked in accidentally. The holding devices can consist of corresponding webs that cause a narrowing of the clear opening so that the aroma carrier is firmly secured in place. The holding devices can also be formed by knob-like protuberances on the inner walls of the receiving hollow body. The webs and/or knobs can influence the flow of the aerosol over the outer surface, for example by lengthening the flow paths so that the aroma exchange is increased. The expert can also achieve a secure positioning of the aroma carrier in the central body of the aroma booster in other ways. For example, the aroma carrier can be clamped in by appropriate shaping of the central body or fixed in its desired position by a spatial limitation. It is important that the aerosol flowing through the aroma booster over the outer and/or Inner surface of the aroma carrier, for example the cylindrical cotton roll, to absorb the aroma. The flow paths of the steam or smoke over the surface of the aroma carrier (outer surface and/or inner surface) are also referred to as flooding channels in this description. The aroma booster according to the invention therefore differs significantly from similar-looking devices from the prior art: the aerosol flowing through the aroma booster is not filtered by the aroma carrier (in particular, no smoke particles are filtered out of the aerosol), but the aerosol is loaded with aroma.

The entire hollow body for holding the aroma carrier is preferably designed to be rotationally symmetrical, e.g. with a cylindrical central part and two cone-shaped attachments, on the one hand as a connection to the hose and on the other hand as a mouthpiece. The external shape is not important and can also be designed in a different form. Alternatively, the aroma booster can also be shaped like a double cone. The decisive factor is the ability to hold the aroma carrier described above, for example the ability to hold at least one cotton roll 2-6 cm long (preferably 4 cm) and a diameter of 0.5 - 2 cm (preferably 0.8 -1.2 cm). One design option is to hold several cotton rolls (e.g. 2 rolls 4 cm long one behind the other). This type of design enlarges the surface area of the cylinder, so that more aroma can be released per unit of time. The entire aroma booster typically has a length of 10-20cm and a maximum outer diameter of 1.25 - 5 cm. In the case of using polymer foams as aroma carriers, the size of the aroma carrier can be reduced, since the Polymer foam can absorb significantly more aroma solution per unit volume of the aroma carrier.

The entire aroma booster is preferably made of plastic, preferably by injection molding, for example from polypropylene, polycarbonate, polystyrene or copolymers. Other manufacturing processes are also possible, such as 3D printing. It is preferably manufactured in two parts, which form the finished aroma booster by being put together using locking elements. In this way, the aroma carrier, e.g. in the form of a cotton roll, can be inserted before the two halves are brought together.

The aroma carrier is soaked in an aroma solution for use in the shisha. The aroma carriers are able to absorb large amounts of solution. Care must be taken not to absorb so much solution that the solution flows out after being inserted into the aroma booster chamber. A cotton roll weighing approx. 0.5g, 3.8cm long and 1.2cm in diameter is able to absorb 3-5ml of solution. Cotton rolls with other lengths and diameters absorb less liquid due to the change in volume. When using aroma carriers made of polymer foam, a cylinder 1.5-2cm long with the same diameter is sufficient to absorb 1.5-3ml of solution.

The solvent portion in the aroma solution preferably, but not exclusively, consists of 1-30% propylene glycol and 70-99% of the aroma substances (raw material portion). Small amounts of ethanol (or other physiologically acceptable solvents, e.g. water, glycerin) may be included. The aromas (e.g. apple, pear, strawberry, vanilla, coconut, blueberry, blackberry, orange, lemon, Bergamot, melon, pineapple, cinnamon) are commercially available and therefore do not require any further explanation at this point. To achieve a weaker aromatization, the solvent content can also be 31-99% and the aroma raw material content 1-69%.

The manufacturer Hertz & Selek, for example, offers an ice candy flavor:

The solvent content of this flavor is 18% in the form of propylene glycol.

The aroma raw material concentration would be 82%. (Aroma raw material concentrations are usually raw material mixtures, which then produce the desired taste).

According to the invention, it is possible to place soaked aroma carriers in one of the halves of the aroma booster and then close this with the other half. Alternatively, it is possible to place the dry aroma carrier in one half of the aroma booster, close the aroma booster with the other half and then introduce the aroma solution into the cotton wool using a syringe. For manufacturing reasons, the first variant is preferred.

The finished aroma booster, loaded with aroma solution, can be sealed in packaging film and can be stored in this form for at least 12 months. It is advantageous to provide the aroma booster with two end caps before sealing, which prevents premature loss of aroma.

The holding elements described above hold the cotton roll in such a way that the steam or smoke of the shisha is guided over the outer and/or inner surface (e.g. in the case of hollow cylinders) when sucking on the mouthpiece. The flowing aerosol absorbs the aromatic substances contained in the cotton wool.

The aroma booster according to the invention is plugged onto the hose of a shisha in one embodiment as described above. For this purpose, it is conically shaped on this side. Typically, plugging it into the hose opening results in a sufficient seal. The cone of the aroma booster can of course also contain sealing elements, such as rubber rings, to improve the seal with the hose. At the other end, the aroma booster also contains a substantially conical shape, analogous to the usual mouthpieces used in a shisha. The aroma booster according to the invention can also be attached to a conventional mouthpiece of a shisha (similar to the well-known "hygienic mouthpieces"). The connection elements of the aroma booster can also have a screw connection, a bayonet connection or a magnetic closure. In any case, additional sealing elements (e.g. rubber rings) can be present to further improve the tightness of the connection.

In other embodiments of the invention, the aroma booster is positioned elsewhere between the aerosol generating element (typically but not exclusively the shisha head) and the mouthpiece, for example between the aerosol outlet on the bowl and the hose (see also Figure 14).

The aroma booster according to the invention allows various ways to improve shisha smoking or vaping.

First of all, the aroma booster can enhance the aroma experience. The aroma contained in the aroma booster can be identical to the aroma that is present in the shisha head. The result is an intensification of the aroma experience (aroma booster). Not only does the taste appear significantly more intense: the shisha user also gets a significantly more differentiated taste: for example, it is possible to distinguish different types of mint in terms of taste using the aroma booster according to the invention, whereas with conventional shisha smoking, different types of mint in the head of the shisha do not lead to a different taste experience for the user.

It is also possible to operate the shisha head without any aroma at all. To do this, simply heat commercially available shisha tobacco and/or tobacco-free carrier material in the shisha head. In this way, the aromatization does not take place in the head, but only via the aroma booster, which ensures the more intense and differentiated taste experience described above. The aerosol can also be generated purely by electrically heating glycerine and/or propylene glycol, for example in the manner of a vape.

The aroma booster according to the invention also makes it possible for several people to use different flavors on one shisha by using differently flavored aroma boosters. This eliminates the need to agree on a flavor before using a shisha. Each person can get their preferred flavor from the respective aroma booster.

It is also possible to use a first aroma in the shisha head and a second aroma in the aroma booster. This allows you to create individually selectable aroma combinations that go beyond the usual commercial offerings.

It is also possible to use two aroma boosters in combination. For example, there are lovers of mint aromas, who like to combine other flavors with mint. By putting two flavor boosters together, it is possible, for example, to combine a first flavor (e.g. apple flavor) with a second flavor (e.g. mint flavor). It goes without saying that any other flavors can also be combined in this way.

What all applications have in common is that the aromatizing effect of the aroma booster according to the invention lasts for a very long time without losing intensity. With conventional shisha smoking, the smoke or vapor typically loses flavor intensity after a few minutes, and after 60 minutes at the latest, no aroma is perceptible anymore, while the aroma booster according to the invention can generally be used for more than four hours without losing flavor intensity. In some cases, the aroma booster according to the invention could be used for 6-10 hours.

It was initially surprising to the expert that a significant aromatization of the smoke or vapor is possible with the aroma booster according to the invention. The opinion of the experts was that the aromas in the shisha head had to be heated in order to evaporate the aromatic substances. The mouthpiece according to the invention is flowed through by a comparatively cool aerosol (between 20 °C and 40 °C) because the aerosol in the bowl was cooled accordingly as it flowed through. It was not to be expected that sufficient aromatization of the aerosol would be possible at this temperature.

For the expert, it was also surprising that a very differentiated aroma perception is possible with the aroma booster according to the invention compared to conventional shisha smoking. Without wishing to be bound to this theory, it is assumed that the usually in the head of the The conditions prevailing in a shisha (temperature between 300 and 800°C) can lead to a (partial) breakdown of the very sensitive aromas, so that taste nuances are lost. In addition, the aromas in the bowl are washed out (especially the hydrophilic aromas) and the vapor/smoke has a relatively long path through the smoke column (typically around 50cm) and the hose (typically around 100cm), so that in the end only a small part of the originally used aromas reach the user.

The device according to the invention is further illustrated by the attached figures. The figures show various embodiments of the invention without intending to have a limiting effect. The person skilled in the art can easily construct variants and other embodiments of the invention without having to be inventive.

Figure 1 (Figure X) shows a basic configuration according to the invention.

In part figure XA, 1.1, the smoke tip, is the upper part of the mouthpiece. An opening 1.3 is provided on the top, onto which a closure cap 3.1 can be placed. 1.2 is the hose connection, the lower part of the mouthpiece, with an opening 1.4 on the bottom, which can also be closed with a closure element 3.2.

Partial figure XB shows an aroma carrier (aroma carrier) with 2, which can absorb liquid, e.g. aroma solution 4, and release it as an aerosol and/or liquid. In 4 an aroma liquid can be seen, which fills the aroma carrier 2.

The assembled aroma booster can be seen in part XC. The aroma carrier 2 has been placed inside the aroma booster. The smoke tip 1.1 of the aroma booster is connected to the hose connection 1.2 of the aroma booster. closed. The filled aroma carrier 2 with the filled aroma 4 is therefore located in the interior. On the underside, the aerosol can flow through the opening through the flooding channel of the aroma booster in the direction of the upper opening, whereby the aerosol flows past the aroma carrier 2 filled with aroma and absorbs the aroma 4. Here, the aerosol mixes with the aroma to form the aromatized aerosol 2/4 in the interior. The lower opening 1.4 can be closed with the closure element

3.2 and the upper opening 1.3 are closed with the closure element 3.1. Furthermore, in Figure XC, the components 1.1 and 1.2 and their designed openings

1.3 and 1.4 have another advantage. The narrower part 1.4 fits tightly into the opening 1.3. This makes it possible to put 2 aroma boosters into one another and to let the air flow through both aroma boosters inserted into one another past the respective aroma carriers. This makes it possible to mix 2 or more aromas together. The aroma boosters can also be attached in other versions using screws, bayonets, magnets or similar locking devices.

Figure 2 (Figure A) shows embodiments of the aroma carrier 2.

In part figure AC, 3 is the assembled aroma booster with an inserted, round, roll-like aroma carrier A4. This is the standard version in which aroma carrier 2 is used, which aromatizes the aerosol via the outer surface.

Furthermore, the material and the material structure of the aroma carrier 2 can be designed in such a way that even in the soaked state, many small flooding channels are present, which summed up a large surface and thus offer a release area for the aroma.

In another example, where a slightly smaller/narrower aroma carrier tilts in the interior and thus leans slightly to one side towards the inside of the aroma booster, the flooding channel is reduced in size on one side but enlarged on the other side.

In partial figure AE, the aroma carrier 6 is a preferably, but not exclusively, wave-shaped outer surface 6.1. What is important here is that through a deliberate but arbitrary formation of the structure in the outer surface and/or at another, arbitrary location of the aroma carrier 6, the aroma carrier 2 serves as a contact surface for the aerosol and for aroma absorption.

This special structure is created to create a larger contact surface. Furthermore, this aroma carrier 6 could be inserted so that it fits snugly against the inner walls of the aroma booster 3, and there would still be flooding channels for the aerosol to pass through due to the wave-shaped structure of the aroma carrier 6.1. The surface area can also be increased, for example, using a hollow element or an internal channel.

In partial figure AD, a hollow element 5.1 is used as the aroma carrier 5 under 5 and 5.1. This can be inserted so that it fits flush with the inner walls of the aroma booster 3, so that the aerosol flow can only flow through the hollow element. Or a minimal space can be created for the outer surface of the aroma carrier. In this way, the aerosol flows through the hollow element/channel, the inner channel, and on the outer surface of the carrier element. The hollow element guarantees that the flooding channel of the aroma booster is not blocked because the flooding channel of the hollow element 5.1 is inserted centrally in the interior. This means that displacement is not possible. Even in the variant with minimal space for the outer surface of the aroma carrier 5, the aerosol channel 5.1 of the aroma carrier 5 can only slip minimally. This can be taken into account in the size of the aerosol channel 5.1 when producing the carrier 5/5.1, so that flooding through the aroma booster as well as through the aroma carrier 5 and the aerosol channel 5.1 is always guaranteed, even with the smallest possible slipping.

Partial figure AA shows the aroma carriers AA1 and AA2, preferably but not exclusively made of different materials. Carrier AA1 represents/provides the aroma tank. The material and structure of an aroma carrier AA1 is designed so that it can absorb and release a lot of liquid. The material and part AA2 is a hollow element which is pulled over the outer surface of the aroma carrier. The element AA2 is made of a material which draws liquid through many channels through the concentration gradient into the entire part AA2, similar/comparable to chromatography. The material used can preferably but not exclusively be a silica-like product, nylon or similar. Their surface structure is further enlarged by a special shape (similar to part figure AE). The advantage here is that a large release area is offered, but the tank itself in the aroma carrier AA1 remains small and is not wasteful with liquids/flavors. Due to the special physical and chemical properties and/or material and/or structural properties to create many capillaries that carry the liquid/aroma throughout the Draw carrier part AA2 from carrier tank AA1 until carrier part AA2 is saturated. When the aromas are released through carrier part AA2, liquid/aroma is drawn from carrier tank AA1 into carrier part AA2.

Partial image AB shows AB2 . 1 and ABI . 1, a similar function as shown in AA2 and AA1, the material structures are similar/the same as in partial image AA and their function. In ABI . 1 is the tank and in AB2 . 1 is a surface enlargement, but here the only difference is that AB2 . 1, here the hollow element AB2 . 1 is inserted into the aroma carrier ABI . 1 with the aroma in the inner channel ABI . 1 of the hollow element.

Figure 3 shows the images Al .

The system is reflected here as described in figures A under partial figure AA. The difference is that the aroma carrier Al-1 has now been pushed into the middle of the hollow body Al-2. This combination A1A can then be inserted into the interior of the aroma booster 3. The advantage here is that an improvement in the flooding channels is guaranteed, as A1A cannot clog the top and bottom / at the taper, as part Al-2 sits on the air openings of the aroma booster 3 like a top and bottom pipe socket. The aroma carrier, which is inserted, could have many small flooding channels due to its material structure. Or it could also have hollow flooding channels inside the inner area of the carrier Al-1 (similar to part figure AID under Al-5.1). Or by shaping/preferably but not exclusively wave-shaped on the outside/outer surface of the carrier Al-1/similar to that in partial figure AE. This creates flooding channels in the design A1B and an upper and lower enlarged surface on the underside due to the external hollow element

Partial figure AC shows the hollow element/aroma carrier AC5, with an internal flooding channel AC5.1. This aroma carrier AC5 is inserted into the interior of the aroma booster 3, preferably but not exclusively, fitting with the outer walls of the aroma booster 3 and thus without a flooding channel on the outer surfaces of the aroma carrier AC5, since this fits tightly with the inside of the aroma booster 3 in the interior.

In this version, a hollow element AC5, AC5.1 was created, with an internal flooding channel AC5.1, which with its upper and lower sides AC5.1 on the openings of the aroma booster 3 and thus creates a permeable flooding channel.

Figure 4 shows the images B.

In Figures B, new, different shapes for the aroma carriers Bl, B2, B3, B4 are shown, this in relation to an outer surface of the aroma carrier Bl, B2, B3, B4 to be offered and with the background of not closing off the tapered flooding channels of the aroma booster 3. Thus, preferably but not exclusively, a shape is selected in the outer surface of the aroma carrier so that the top and bottom flooding channels are not covered and the aerosol can pass along the outside of the aroma carrier. The corners due to the shape of the new aroma carriers Bl, B2, B3, B4 can also have a fixing effect in the interior of the aroma booster 3, but without completely covering the flooding channel of the aroma booster 3. Figure 5 shows the images C .

In part CA, a hollow element is designed as an aroma carrier Cl . 1 with a single inner channel .

In order to guarantee more contact surface, in the partial figure CB the aroma carrier CB2 is provided with at least two flooding channels, in this version with three flooding channels.

In the partial figures CC and CE and a material is selected, preferably but not exclusively a mixed material, preferably but not exclusively made of cotton and various polymers / elastane / PET or similar. This enables a firmer structure in the aroma carrier, since the preferably but not exclusively mixed polymers for the cotton results in a firmer structure. One could also speak of a carrier material similar to foam, produced using a hot melt adhesive free fiber (PET) process, preferably PET and PA as materials (product name INTERGRATED OIL STORAGE COTTON). The firmer structure makes it possible to create many small flooding channels CC3 . 2 / CE3 . 2, which, thanks to the firm structure based on the material selection, do not stick together even if the aroma carrier 3 is fully soaked and the flooding channels CC3 . 2 / CE3 . 2 are retained. The large number of flooding channels CC3 . 2 / CE3 . 2 created in the partial figures CC and CE result in a very large surface area, comparable to that of a complete outer and/or inner surface known from the figures and partial figures described above. Figure 6 shows the images CI .

In the partial illustration CIA, an aroma carrier C1A1 can be seen which creates various air-permeable flooding channels C1A2 on the top and bottom through certain shapes such as channels and/or feet C1A2, even when the carrier element C1A1 is standing on the top and bottom openings of the aroma booster. Here, a certain space was deliberately created on the outside between the aroma carrier C1A1 and the inside of the aroma booster 3 by making the said aroma carrier C1A1 slightly smaller in diameter than the inside of the aroma booster 3 in the interior. In this way, flooding over the entire aroma carrier is ensured by the flood-actively designed top and bottom sides C1A2 of the aroma carrier C1A1 and by the minimal space created between the aroma booster 3 and the aroma carrier C1A1.

In the partial figure C1B, the same result is shown, but with a much larger outer surface. Here, an aroma carrier C1B3 can be seen. In the partial figure, marked with C1B4, deep flooding channels are created that are directed towards the center. This allows the aerosol to flow through the upper and lower openings of the aroma booster 3 through the created flooding channels, which in turn flow past the enlarged outer surface shape and absorb the aroma. The depth of the flooding channels C1B4 in the direction of the aroma carrier C1B3 center reduces the radius in the center of the carrier element at least to such an extent that the radius at least at the deepest point of the flooding channel C1B4 is smaller than the radius of the upper and lower flooding channels of the aroma booster 3 in the interior. Figure 7 shows the images D .

Figures D show the various options already described for creating the flooding channels and/or holding elements in the aroma booster 3. These are intended to ensure the best possible aroma exchange and air flooding in the combination of the aroma booster 3 and the aroma carrier.

In part of figure DA, an integrated air channel is created under DAI . 2, which is created by a depression in the material of the aroma booster . The devices under DAI . 1 are possible holding elements for the aroma carrier .

Further designs for the aroma carrier are described in partial figure DB. These are as follows: an external shape DB2.1, an internal shape DB2.2 and the material structure with the creation of flooding channels DB2.3, which are minimal in size but offer a large surface area due to the large number and summation of all flooding channels and thanks to the choice of material (preferably mixed material) retain their given produced shape/structure even when fully soaked.

Figure 8 shows the images E .

Partial illustration EA shows an aroma booster 3 which has flooding channels on the bottom, but also possibly on the top, inside the aroma booster. These flooding channels are incorporated into the material in the form of depressions. This could be achieved by the shape of the pointed foot, but also by material, recesses, etc. Another possibility in production would be through a two-component workpiece if the material thickness is not sufficient for recesses. As can be seen in partial figure EB, a first material could be produced with the recesses EB1 and then the second material EB2 would be produced around the outside of the first material after the two-component production.

This version of the Aromabooster 3 creates or enables various flooding channels even with a precisely fitting aroma carrier roll

By adapting the flooding channels to the tapered openings on the top and bottom, a complete air flow without blockage is guaranteed

In part of figure EC, a precisely fitting aroma carrier EC4 is again shown on the underside, which with its internal flooding channel / is centrally located on the top and bottom of the openings of the aroma booster 3. A top view can be seen in EC4.1. In order to create an enlargement of this contact surface in the inner channel, the shape of the inner flooding channel in part figures EE and part figures EF was enlarged, preferably but not exclusively by means of a wave shape.

A preferred design in this case is to use the combination of the aroma carrier EE/EF in the partial image EA shown above with the incorporated flooding channels on the inner wall of the aroma booster 3. This would create an extremely large contact surface in the sum of the surfaces. Figure 9 shows the images F .

The importance for the aroma carrier in relation to the combination of the contact surfaces to be created and/or the material selection and/or the material structuring created during production for the best possible aroma exchange or continuous, consistent quantity release is now explained.

It is important to choose a material which allows the aroma liquid to flow quickly to the contact surface (contact surface with the aerosol). This is the only way that the aroma liquid already removed by the aerosol can be refilled at the contact surface. For this, the selection of the material and/or the selection of the material structure is important in order to create an optimal infrastructure of flow channels, capillaries, etc. in the aroma carrier in order to allow liquid to flow from the space to the "empty" space, the contact surface. This happens through the osmotic gradient in order to restore the osmotic balance. This means that the contact surface which is responsible for the exchange or release of the aroma to the aerosol is always consistently supplied with aroma liquid.

The partial image FA shows an internal flooding channel FA3 . Here the aroma liquid flows into the middle of the aroma carrier FA1 to the "emptied" contact surface FA2 .

In the partial figure FB, the contact surface for the aroma exchange is on the outside of the aroma carrier FB5 . Here, the internal liquid is drawn outwards by osmosis in order to refill the contact surface with liquid. The functioning of the osmotic balance works in the same way as in partial figure FA, except that the contact surface which releases the aroma liquid is on the outside and therefore the liquid flows outwards to the outer wall of the aroma carrier due to the osmotic gradient. There the aerosol FB4 can then repeatedly absorb aroma from the outer surface of the aroma carrier FB5

Figure 10 shows the images G .

In part figure GA you can see the aroma booster 3 with the upper and lower sections and the created interior. In part figure GC an aroma carrier for aroma is shown in the form of a roll, which is then inserted into an adapter device GB. Like the version in part figure E / part figure EA/EB, the adapter GC2 has flooding channels on its inner wall as described. This guarantees the flooding and flow of the aerosol when the aroma carrier GC1 is inserted into the adapter GC2 and this is then inserted into the aroma booster 3.

Figure 11 shows the images H .

The aroma booster 3 can be seen in part of the figure HA. Here, another type of adapter is shown in part of the figure HB. Openings HB4.1 are provided on the top and bottom, which ensure that an inserted aroma carrier/cotton roll can pass through. The aroma carrier HB1 is placed in the adapter, and the adapter HB4 in the aroma booster 3.

In partial illustration HD, the adapter HD4 could have a protruding pipe socket HD4 2 on the top and bottom in addition to the openings in order not to block the openings on the top and bottom in the aroma booster 3 and the adapter HD4 . Figure 12 shows the figures I.

In part IA, balls II of the same size II.1 are shown in the aroma booster 3 as a possible design for an aroma carrier. Because these are always the same size, the resulting free space and air channel can be calculated.

The same applies to the partial images IC and ID with tube-like elongated elements IC2) of always the same size to create a flooding channel to be calculated.

12.1

Figure 12.1 shows the central body (2,3), in which the inner walls consist of several separate inner wall segments (1, 1.3) which are arranged in such a way that a vortex-generating funnel shape as well as an extension and rotation of the aerosol stream (1.4) occur.

Similar to a fan, the passing air/aerosol/vapour/smoke is forced/forced (1.1) through the diagonally connected inner walls into a rotating air stream (1.4)

This rotating swirling of the air flow could also be achieved by diagonally arranged or wave-shaped fins inside the central body, which could preferably, but not exclusively, also function as holding elements.

Figure, 13

In Figure 13, the central body (3) is shown as it is inserted into the end of the shisha hose (2). Here, the central body is produced in the lower part with the plug-in device (3.1) with a preferably more plug-resistant surface. This could be another material, a rubber coating such as Silicone, TPE or similar. This is preferred but not exclusively in a production process for two components. Due to the softer surface, the attachment is firmer when inserting the central body and also avoids the draft over the outer walls and channels the draft completely over the interior of the central body.

Figure, 14

In Figure 14, the placement of the central body at the lower end of the hose is directly attached to the shisha/water pipe. Thus, it acts as a middle piece between the shisha water pipe and the hose

Figure 15 shows a schematic of an application of the aroma booster according to the invention with aromatization function for a shisha. The aroma booster itself is designated with the reference symbol XI. It contains an aroma carrier X2 inside the rotationally symmetrical central body. Figure 15 shows three different embodiments of such aroma carriers. These are provided with the aroma before use.

(F6). The structure of the aroma booster in two halves is also explained under X4, so that the aroma carrier can be placed inside the aroma booster and then closed.

When using the aroma booster according to the invention, it is attached to the hose of a shisha through one of the conical ends. In this way, the aerosol formed in the shisha head is directed into the aroma booster after passing through the water bath in the bowl when the consumer sucks on the aroma booster. The formation of aerosols in the shisha requires that an aerosol-forming substance in the head of the shisha is heated to a sufficient temperature so that an aerosol forms. For this purpose, for example, Tobacco leaves or a tobacco-free carrier material (e.g. made of cellulose) or a mixture thereof are used, which are moistened with a solution of (e.g. glycerine, propylene glycol and water). The main component of this solution is usually glycerine. The solution can also contain flavourings. In contrast to the classic shisha, no flavouring is required in the shisha head to use the aroma booster according to the invention. With the classic shisha, the temperature is set via the type, size and number of coal pieces or the distance between the coal and the tobacco and/or by regulating the ventilation and/or by covering the coal and/or tobacco. This setting is usually done manually according to feel. Alternatively, an electric heater can be used, which typically allows a more precise setting of the temperature. The temperature in the shisha head can, depending on the exact structure and the airflow, be 300-850 °C in the coal, while in the tobacco or carrier material it is approx. 150-300 “ Celsius can be reached.

Aerosol formation from a mixture of glycerine, propylene glycol and water begins at considerably lower temperatures. At temperatures above 200 degrees Celsius, even sensitive aroma substances can be decomposed.

The aerosol formed in the shisha head is passed through the bowl and through the aroma booster by sucking on the mouthpiece of the aroma booster according to the invention. In the aroma booster, the aerosol flows over the aroma carrier and absorbs aroma. The temperatures in the aroma booster are between room and body temperature. It was surprising to the expert that at this temperature the aerosol absorbs enough aroma to be perceived by the user. The flow of the aerosol requires an air channel. Depending on the exact design, this air channel can be formed, for example, between the outer surface of a cylinder and the inner surface of the aroma booster. Appropriate webs or knobs can be used to fix the aroma carrier in such a way that sufficient air flow can occur around it. The air channel can also be formed so that it lies inside the aroma carrier, for example by using a hollow cylinder. Alternatively, the aroma carrier can have a star-shaped cross-section, so that by inserting it into the aroma booster, channels are formed on the surface, which ultimately increase the total surface area of the aroma carrier.

Due to the comparatively low temperature inside the aroma booster, there is no danger of thermal decomposition of the aroma substances.

Figure 16 again shows the conditions in the aroma booster 2 according to the invention. The glycerine vapor X3 goes through the cone-shaped connection piece of the aroma booster indicated below into the interior of the aroma booster X2. In this example, the flow takes place around the cylindrical aroma carrier (direction of the arrow). For this purpose, a distance is required between the aroma carrier and the inner wall of the aroma booster, which can be formed, for example, by corresponding webs and/or knobs. The flow path can also be changed by shaping the webs. These can, for example, be attached parallel to the aroma carrier, in a wave-shaped or spiral shape, so that different flow path lengths are conceivable. Less intense aromas can be enriched in the aerosol by extending the flow path. The flavored aerosol can then be sucked in through the mouthpiece R. The design of the device according to the invention allows for a great deal of variability, which can be adapted to the different flavors. The aerosol X3 is preferably not flavored for the application according to the invention, but can also already contain flavors. The design of the aroma booster allows for a great deal of variability, in order to use different flavors. It goes without saying that the concentration of the aroma solution can vary, as can the amount of aroma solution that can be absorbed by the carrier. It is not a given that the surface of the aroma carrier can also be varied, e.g. by using different materials and/or different shapes. The carrier material itself can also be varied. Finally, the length of the flow path can also be influenced. In this way, the taste perceived by the user can be individually adjusted.

Figure 17 shows schematically the various chemical and/or physical properties of the components of the invention when used according to the invention. The various chemical and/or physical properties and their interactions with one another determine the result. The individual components and their properties can be selected and coordinated as required in order to influence the result. The reference symbol XI here designates a standard shisha that emits a standard aerosol. As already explained above, the aerosol is formed by applying a solution containing glycerine, propylene glycol and water to a carrier and heating it. Shisha tobacco, but also tobacco-free material, e.g. cellulose, can be used as the carrier. Mixtures are also possible. The aroma booster according to the invention contains in particular the aroma carrier (carrier element). This can be made of different materials and contained in different quantities. The material and its quantity determines the absorption properties for the aroma.

Of course, the aroma concentration can vary. The release of the aroma into the flowing aerosol is influenced by the material and its surface. When the aerosol comes into contact with the aroma on the surface of the aroma carrier, the aroma transfer occurs depending on the contact time, the aerosol concentration, the aroma concentration, the size of the air channel, the release capacity of the aroma carrier, the absorption capacity of the aerosol, the contact time and the contact area as well as the osmotic gradient. All of these different properties can be varied in order to achieve an optimal result for the use according to the invention.

Figure 18

In Figure 18 the central body (one) is shown in two parts. In 1.1 the support element is written inserted

In Figure 18.1, under three and two, the support element is written, which is inserted into the central body.

What is new here is that preferably, but not exclusively, the carrier element and the aroma liquid are kept separately by attaching a liquid container (three) with an injection opening (3.1) to the top of the carrier element (two). The injection opening (3.1) points into the carrier element attached to the bottom. The aroma liquid is thus sealed in isolation, but can be filled into the aroma carrier/carrier element by a manual process/step (18.1 to 18.2). This is done in a closed system, without opening the central body. This is done by assembling the central body (18.1) in a closed manner, but in a first position. A second position can be achieved by pushing the upper part of the central body together lengthwise downwards via the inner pipe socket (1.1) attached to the lower part of the central body. This reduces the previous, larger interior space of the central body (18.1) to a smaller interior space (18.2) and thus causes the liquid from the liquid chamber (3) arranged on the top to be filled into the carrier element/aroma carrier (18.2) via the liquid injection opening (3.1).

A safety device on the middle part/pipe socket (1.1) to guarantee a positional security between position 18.1 and 18.2 could preferably but not exclusively be a plastic ring, which is clicked in and removed when necessary to fill the carrier element with liquid.

Figure 19

Figure 19 describes another device with a new function for attaching an aroma liquid container to the carrier element/aroma carrier and later mixing/filling

In Figure 19, the upper and lower parts of the central body (one) are shown, with protruding fin elements (1.1) attached to the inner sides of both central body halves

In 19.1, a carrier element/aroma carrier (2) with an internal hollow element/internal channel (2.1) is shown.

An Aroma Liquid Container (3) is inserted into this hollow element. Due to its special shape, it fits with a elongated aroma liquid container (3.2) closing into the internal aroma carrier channel (2.1). The aroma liquid container also has a stopper element which fixes the liquid container in the aroma carrier after it has been inserted and prevents the aroma liquid container from slipping into the channel

The inserted liquid container (3.2) is slightly longer than the aroma carrier/carrier element (two). The end piece of the liquid container (3.2) therefore protrudes from the lower end of the aroma carrier. Another identical stopper device (3.1) is attached here and thus ensures that the aroma liquid container (three) does not slide up and down.

The now finished aroma carrier with aroma liquid container (19.2) is now inserted into the device of the central body 19

In 19.3, the opening of the liquid container (3) is described in which the upper and lower halves of the central body (one) are axially rotated together. Here, the inner fins, elements (1.1) of the central body engage the upper stop elements of the liquid container 3.1 attached to the underside.

The liquid container is opened by the mutual axial twisting movement of the upper and lower central body halves, preferably but not exclusively by a break in the material or an opening. This releases the liquid from the aroma liquid container to the aroma carrier/carrier element. This all happens in a closed system. Figure 19.1

19.4 and 19.5 describe a further device with an aroma carrier/carrier element with an attached liquid container. Here, in a preferred but not exclusive device, the liquid container from Figure 19/19.2 is attached to the interior of the central body, in at least part of the central body, preferably but not exclusively attached centrally, at least one actuating element (five) is provided, which can be moved from a position 19.4/5 to a position 19.5/5.1. Position 19.4 is a position in the state without manual intervention. In Figure 19.5, at least one actuating element (five) is manually pressed in towards the interior, moved, and thus causes the liquid container (19.2) to create an opening element and release the aroma liquid to the carrier element/aroma carrier.

Figure 20

In Figure 20, various devices are shown, which describe a preferably, but not exclusively, attached center piece, which is placed between the two halves (top and bottom). This center piece (3) serves as a holder for fixing the aroma carrier element (2), designed in that the holder is configured in such a way that an unrestricted air flow (3.0) is possible through the central body, but the aroma carrier is held in position.

In Figure 20, the intermediate part is described as a loose, insertable functional part. This can be inserted between the upper and lower parts of the central body.

In Figure 20 you can see in particular another possible device for insertion into the central body. Here is a tube-like middle piece is described, which has the functional part firmly produced in the middle of the tube.

The middle part 3.2 is thus inserted into the interior of the central body between the upper and lower parts. The advantage here would be a possibly better fixation due to the shape of the functional part 3.2

A similar tubular functional part is shown as 3.3, here the holder is permanently produced at the lower end. Preferably, but not exclusively, plastic injection molding!

In Figure 3.4, the middle piece for all functional parts is shown with a further opening for air flow. Here, air flow is not only possible via the open areas outside the cross (3.0), but the middle piece is also produced in such a way that the central bracket also offers air flow, as shown in 3.4. This device is preferred for the device from Figure 8/Figure 2/AD Figure 3/A1D Figure 5CA.

A particularly simple embodiment of the invention is shown in Figures 21-22.

Figure 21 (above) shows the external view of the aroma booster according to the invention.

Figure 21 (bottom) shows a cross-section through the aroma booster according to the invention.

Figure 22 (above) shows one half of the aroma booster according to the invention (mouthpiece attachment) with the chamber for receiving a cotton roll. Figure 22 (below) shows the complementary second half of the aroma booster according to the invention (hose attachment) with the chamber for receiving a cotton roll.

The reference symbols used in Figures 21-22 have the following meaning:

1) Hose connection of the aroma booster

2) Mouthpiece of the aroma booster

3) Central body with possibility to hold cotton roll

4) Chamber with cotton roll

5) Bridge for centering the cotton roll and for ensuring the steam draft over the surface of the cotton cylinder

6) Spacer to ensure gas flow to the mouthpiece

7) Plug connection with sealing elements (inner part)

8) Plug connection with sealing elements (outer part)

The embodiment of the invention shown in Figures 21-22 can be used as follows:

Example 1:

A cotton roll with a length of 4 cm and a diameter of 2 cm is used as the aroma carrier (surface area: 31.4cm ² , volume: 12.56cm ³ ). The aroma carrier is soaked with 3 ml of an aroma solution containing 75% propylene glycol and 25% of an aroma solution (containing apple and mint aroma). After assembling the aroma booster, a connection is put on the hose of a hookah. The other connection element forms the mouthpiece. The hookah is operated in a known manner, with the heat source being formed by pieces of coal that heat a tobacco-free carrier (according to WO 2021/220255 A2 ) that is soaked in glycerin/propylene glycol. Heating the soaked carrier substance creates an aerosol which can be sucked in by sucking on the mouthpiece of the aroma booster. The aerosol passes through the water bath in the bowl and reaches the aroma booster, where it is flavored. The aroma booster can be used for more than four hours without the flavor taste diminishing.

Example 2:

A cotton roll with a length of 4 cm and a diameter of 2 cm is used as the aroma carrier (surface area: 31.4 cm ² , volume: 12.56 cm ³ ). The aroma carrier is soaked with 3ml of an aroma solution containing ice candy aroma (82% aroma, 18% propylene glycol). After assembling the aroma booster, a connector is attached to the hose of a shisha. The other connection element forms the mouthpiece. The shisha is operated in the usual way, with the heat source being formed by pieces of coal that heat a tobacco-free carrier that is soaked in glycerine/propylene glycol. Heating the soaked carrier creates an aerosol that can be sucked in by sucking on the mouthpiece of the aroma booster. The aerosol passes through the water bath in the bowl and reaches the aroma booster, where it is flavored. The aroma booster can be operated for more than four hours without the aroma taste diminishing. The aroma is perceived by consumers as more intense than the aroma in example 1. The following adjustment options are available to weaken the perceived aroma:

- Reducing the aerosol production in the shisha head by lowering the temperature in the shisha head (Example 2.1)

- Dilution of the aroma solution (Example 2.2) - Reduction of the surface area by geometrical change of the aroma carrier (e.g. reduction of the diameter of the cotton roll (2cm) or use of a cotton ball instead of a cotton roll) (Example 2.3)

Example 3:

The aroma booster used in example 1 can also be used on a conventional shisha that produces aerosol based on tobacco containing glycerine. Here, too, it can be used for several hours.

Example 4 :

The aroma booster used in example 1 can also be used on a shisha that contains one of the aerosol-forming substances according to the German utility model 20 2019 103 342.8. In a similar way, it can be used for several hours.

Example 5:

The aroma booster used in example 1 can also be used with a smaller cotton roll (e.g. 2cm long, 2cm diameter, (surface: 18.9cm ² , volume: 6.28cm ³ ) on a tobacco-free shisha. In this case, only 1.5ml of aroma solution is used. The usage time is shorter, but still more than 1 hour. The taste intensity is lower than in example 1, because the surface of the aroma carrier is smaller and therefore releases less aroma per unit of time.

If the aromatization is too weak for the user, the following adjustment options are available:

- Increasing the concentration of flavourings in the solution (Example 5.1) - Increasing the surface of the cotton roll e.g. by

Raised and depressed areas on the cotton roll or

Use of rollers with a star-shaped cross-section (e.g.

5.2)

The present patent application claims the priorities of the German utility models DE 20 2023 000531.0 (filing date: March 6, 2023) and DE 20 2023 001 893.5 (filing date: September 6, 2023), the complete contents of which are hereby incorporated by reference.

Particularly relevant embodiments of the invention are:

1. Aroma booster with aromatization function for a shisha, characterized by a substantially rotationally symmetrical central body and two conical projections, on the one hand as a hose connection and on the other hand as a mouthpiece, wherein the central body has a receptacle for at least one cotton roll soaked in aroma solution in the interior of the central body, wherein the cotton roll is secured against position changes by holding devices and wherein the cotton roll is positioned such that the steam can flow over the outer surface of the cotton roll.

2. Aroma booster with aromatization function for a shisha according to claim 1, wherein at least one cotton roll has a length of 2-6 cm and a diameter of 0.5 - 2 cm.

3. Aroma booster with aromatization function for a shisha according to claim 1, wherein the cotton roll is soaked with 2 - 3 ml of an aroma solution.

4. Aroma booster with aromatization function for a shisha according to claim 1, wherein the complete aroma booster has a length of 10-20cm and a maximum outer diameter of 1.25-5cm.

5. Aroma booster with aromatization function for a shisha, whereby the aroma booster is manufactured by injection molding or 3D printing.

Claims

Claims: 1. Aroma booster for an aerosol-forming device, characterized by a substantially hollow central body and two connecting pieces, wherein the central body has a receptacle for at least one aroma carrier in the interior of the central body, wherein the aroma carrier can receive an aroma solution, wherein the aroma carrier is secured in the interior against changes in position and wherein the aroma carrier is positioned such that the aerosol formed can flow over the surface of the aroma carrier and can be aromatized by the absorbed aroma solution. 2. Aroma booster according to claim 1, characterized by a substantially rotationally symmetrical central body and two conical projections, on the one hand as a hose connection and on the other hand as a mouthpiece, wherein the central body has a receptacle for at least one aroma carrier in the interior of the central body, wherein the aroma carrier can hold a solution of aromas in a solvent, wherein the aroma carrier is secured against position changes by holding devices and wherein the aroma carrier is positioned such that the aerosol formed in a shisha can flow over the surface of the aroma carrier and can be aromatized by the absorbed aroma solution. 3. Aroma booster according to claim 1 or 2, wherein the aroma carrier is formed from natural materials, modified natural materials, multi-component materials, polymer materials, silica gel, mineral materials or mixtures of the aforementioned. 4. Aroma booster according to claim 1 or 2, wherein the aroma carrier is made of cotton, cellulose, cellulose acetate, elastane, PET, polyamide, polyacetate, ethylene-vinyl acetate (EVA), polyolefins, polycondensates, polyurethanes, silica gel, zeolite, montmorillonite, smectite, pumice stone or mixtures of the aforementioned. 5. Aroma booster according to claim 1 or 2, wherein the aroma carrier is designed as a porous or fibrous body with continuous capillaries. 6. Aroma booster according to claim 1 or 2, wherein the aroma carrier has a volume of 0.5-20 cm ³ and a surface area of 4-45 cm ² . 7. Aroma booster according to claim 1 or 2, wherein the aroma carrier is substantially cylindrical, hollow cylindrical, spherical, in the form of a prism with a polygonal cross-section or a cylinder with several longitudinal bores, wherein the aroma carrier can also have channels, depressions or elevations on the surface. 8. Aroma booster according to claim 1 or 2, wherein the aroma booster contains several aroma carriers which are substantially cylindrical, hollow cylindrical, spherical, in the form of a prism with a polygonal cross-section or a cylinder with several Longitudinal bores are formed, whereby the aroma carriers can also have channels, depressions or elevations on the surface. 9. Aroma booster according to claim 1 or 2, wherein the aroma carrier can have on the surface one or more channels and/or one or more depressions and/or one or more elevations on the surface. 10. Aroma booster according to claim 1 or 2, wherein the inner walls consist of several separate inner wall segments which are arranged in such a way that a vortex-generating funnel shape and an extension and rotation of the aerosol stream occur. 11. Aroma booster according to claim 1 or 2, wherein the aroma carrier is cylindrical, 1-6 cm long and has a diameter of 0.5 - 2 cm. 12. Aroma booster according to claim 1 or 2, wherein the aroma carrier is made of a polymer foam. 13. Aroma booster according to claim 1 or 2, wherein the aroma carrier is impregnated with 1-8 ml, preferably 2-3 ml of an aroma solution. 14. Aroma booster according to claim 1 or 2, wherein the aroma solution contains 1-30% propylene glycol and 70-99% of the aroma substances. 15. Aroma booster according to claim 1 or 2, wherein the aroma solution contains 30-99% propylene glycol and 70-1% of the aroma substances. 16. Aroma booster according to claim 1 or 2, wherein at least one container with aroma solution is positioned in or on the aroma carrier. 17. Aroma booster according to claim 14, wherein the container with aroma solution positioned in or on the aroma carrier contains an actuating element by the actuation of which the aroma solution is transferred from the container into the aroma carrier. 18. Aroma booster according to claim 15, wherein the actuating element can be actuated without opening the central body. 19. Aroma booster according to claim 1 or 2, wherein at least one of the connection pieces of the central body is conically shaped, has a plug connection, a screw connection, a bayonet connection or a magnetic closure. 20. Aroma booster according to claim 1 or 2, containing at least two aroma carriers with at least two different aromas. 21. Aroma booster according to claim 1, wherein one of the connecting pieces of the central body has a mouthpiece. 22. Aroma booster according to claim 1 or 2, wherein at least one of the connecting pieces of the central body has a sealing element. 23. Aroma booster according to claim 1 or 2 with two connecting pieces, wherein the aroma booster is positioned between the aerosol generating element and the mouthpiece. 24. Aroma booster according to claim 1 or 2 with two connecting pieces, wherein the aroma booster is positioned between the aerosol outlet of the bowl and the hose. 25. Aroma booster according to claim 1 or 2, wherein the Central body with connecting pieces is manufactured by injection molding or 3D printing. 26. Aroma booster according to claim 1 or 2 for use with an electrically heated aerosol source. 27. Aroma booster according to claim 1 or 2 for use with an electrically heated aerosol source, wherein the electrical heating element generates an aerosol of liquid glycerin and/or propylene glycol without the use of a carrier. 28. Aroma booster according to claim 1 or 2 for use with at least one other aroma booster of the same type in an aerosol-forming device for producing a combination of at least two different aromas. 29. Method for adjusting the aromatization of an aroma booster when used on an aerosol generating device, characterized by - Change in the concentration of the aroma solution - Change the amount of aroma solution - Change in the size of the surface of the aroma carrier - Change in the nature of the surface of the aroma carrier - Change of the material of the aroma carrier - Change in the shape of the aroma carrier - Change of the flow path of the aerosol over the aroma carrier - Change in the contact time of the aerosol when flowing over the aroma carrier - Change in the contact area of the aerosol when flowing over the aroma carrier or - Changes in the osmotic properties of the aroma carrier and any combination of the above. 30. Aroma booster with aromatization function for a shisha according to claim 29, wherein the aroma carrier is formed by at least one cotton roll of 1-6 cm length and a diameter of 0.5-2 cm. 31. Aroma booster with aromatization function for a shisha according to claim 30, wherein the cotton roll is soaked with 2 - 3 ml of an aroma solution.