Mobile fragrance dispensing unit

Abstract

The invention relates to the field of fragrancing devices. The fragrancing device (1) comprises: at least one reservoir (2); a valve (3) for opening and closing each reservoir (2); at least one drive (4) for actuating the valves (3); and a dispensing unit (5). At least one fragrance wets a porous and dimensionally stable structure (6), the surface of which can be exposed to ambient air. The fragrancing device (1) comprises, for each reservoir (2), a valve (3) which is assigned to said reservoir and which closes an opening (7) of the reservoir (2) in a resting position and opens said opening in a working position. According to the invention, the valve (3) is positioned inside the cartridge in order to optionally close the opening (7) in the resting position or to open said opening in the working position.

Description

[0001] Mobile fragrance application unit

[0002] Introduction

[0003] The invention relates to the field of scenting devices. More specifically, the invention relates to a mobile scenting device with active scent release for multiple scents.

[0004] State of the art and disadvantages

[0005] Fragrance units are known in a variety of forms from the state of the art. They are used to deliver olfactory aerosols and can be fragrances, i.e., odors perceptible by a person, as well as substances that neutralize unpleasant odors, or even therapeutically effective compositions that are delivered to a person through the respiratory tract.

[0006] A recently growing market concerns the area of ​​room fragrances, where the primary focus is on increasing well-being. Such devices comprise at least one fragrance source, which is released into the ambient air in a controlled manner by means of a suitable dispensing unit.

[0007] The fragrance can be in solid or liquid form. Liquid fragrances typically allow a larger volume to be scented because it is easier to transfer into the air flowing around them. Storing a liquid fragrance is generally more complex, however; unwanted leakage from the reservoir (e.g., when tilted or due to temperature-induced pressure differences) is of little importance for solids, but must be carefully considered for liquids. A further distinction is made between passive and active application units. Passive application, for example, occurs when a wick, with one end dipped in a fragrance, is dried in the ambient air. This drying process can also be supported by an energy source (heating).In an active system, the evaporating or vaporizing fragrance is also transported out of the device by a fan or similar device that sets the air in motion. While this may require additional energy, it offers the possibility of scenting larger volumes of air.

[0008] Furthermore, a distinction can be made between stationary and mobile devices. While the former essentially remain in the same place and in the same orientation both during operation and between uses, the latter are at least intended to be frequently moved from one place to another (for example, from the bathroom to the living room, then to the kitchen), whereby the orientation of the device may temporarily change during transport. With mobile devices, there is the challenge of ensuring that the fragrance(s) do not leave the device in an undesired manner during transport. At the same time, re-commissioning should be possible without special, complex steps, such as removing, safely storing before, and subsequently reinserting the fragrance reservoirs after use.

[0009] Transport may be possible.

[0010] Another aspect lies in the size of the fragrance device. On the one hand, it should contain a sufficient amount of fragrance to avoid excessive refilling, for example by replacing the reservoir containing the fragrance or by refilling it. However, the device also contains other components such as a power source, a controller, and / or a dispensing unit, each of which takes up space in the housing. However, it is desirable, particularly with regard to the mobility of the device, to keep it as small as possible despite the presence of said components.

[0011] Finally, energy consumption also plays a significant role, especially in an active system. It should ideally be as low as possible without compromising the volume of scented air.

[0012] Task of the invention and solution

[0013] The invention is therefore based on the object of providing a device which avoids the disadvantages of the prior art.

[0014] The invention is intended to provide a transportable fragrancing device for liquid fragrances, ensuring that the fragrance reservoirs contained therein remain sealed at all times when not in use and during transport. Furthermore, the device should provide as much space as possible for the fragrances within a given size. Furthermore, the device should have the lowest possible energy consumption despite the use of an active dispensing unit.

[0015] The object is achieved by a scenting device according to claim 1. Advantageous embodiments can be found in the dependent subclaims, the following description and the figures.

[0016] Description

[0017] The invention relates to a scenting device for dispensing at least one liquid fragrance. The term "fragrance" is to be understood broadly in this context and generally includes all substances that can be released into the air and transported through it, including substances that are not perceptible to the nose, such as odor-neutralizing substances, or physiologically active substances, as well as pharmaceutical products such as medicaments. The invention preferably relates to a scenting device for several, in particular three, different fragrances.

[0018] The fragrancing device comprises at least one (and preferably exactly three) reservoirs for storing fragrance, a valve for selectively opening and closing each reservoir, at least one drive for actuating the valve(s), and a delivery unit for actively distributing fragrance-enriched ambient air. "Active" in this context means that the air is set in motion by a means other than natural air movement, possibly assisted by heating.

[0019] The invention further comprises at least one liquid fragrance which wets a dimensionally stable and porous structure located in the corresponding reservoir or is at least partially stored in this structure, the surface of which can be at least partially temporarily exposed to the ambient air. The advantage of a dimensionally stable, porous structure lies in its significantly larger surface area, which leads to a faster transition of the liquid stored in the structure into the gaseous state through evaporation. This in turn - for a given evaporation rate - has a positive effect on the required size of the reservoir and in particular on the areas thereof which communicate with the ambient air, since these can be made smaller. Consequently, such a reservoir can be built smaller than one which uses a wick for evaporation, and / or a larger volume of air can be treated with the same size. If necessary.The structure required for evaporation can be made correspondingly smaller, thus providing more space for the actual fragrance. A typical size for the reservoir is 5 ml, 10 ml, 15 ml, 20 ml, 30 ml, or 50 ml. However, it can also be larger. Due to the inventive design, a volume of several ml, e.g., 1 ml, 2 ml, 5 ml, or more, is available for the fragrance. This advantage is particularly significant when the overall volume is small.

[0020] The fragrance device also includes a valve associated with each reservoir, which closes an opening in the reservoir in a resting position and opens it in a working position. The use of a valve makes it possible to securely and tightly close the cartridge when not in use, and especially when transporting the fragrance device, without having to remove the cartridge from the housing and store it separately. The valve can be easily and automatically actuated, which is not the case with conventional screw caps and the like. "Rest position" in this context means that no (additional) energy needs to be supplied to the valve to maintain this state ("normally closing valve"), i.e., the valve consumes no energy in this position.This ensures that if the power source fails or if the cartridge is not used for a long time, no uncontrolled release of fragrance can occur. Since the valve is "normally closed" according to the invention, it also ensures that no energy is required to securely close the cartridges when the fragrance device is not in use.

[0021] According to the invention, the valve is positioned inside the cartridge in order to selectively close the opening, which is preferably positioned in the lid of the cartridge, in the rest position or to open it in the working position.

[0022] The opening is therefore preferably located in the cartridge lid so that, in the normal operating position of the fragrance device, gravity keeps fragrance away from the opening. The valve lid is pressed against the opening from the inside, preferably by means of a spring also positioned in the cartridge, thus providing a "normally closed" valve. It is clear that any necessary sealing means (O-ring) must also be provided to increase security against accidental release of fragrance and also to prevent drying out.

[0023] If the valve is part of the cartridge, it is ensured that the cartridge remains securely closed even when it is removed, for which, according to the invention, no energy is required.

[0024] The invention thus avoids the disadvantages known from the prior art.

[0025] The invention provides a transportable fragrance dispenser, ensuring that the fragrance reservoirs contained therein remain sealed at all times when not in use and during transport. Furthermore, the fragrance dispenser provides as much space as possible for the fragrances within a given size. Furthermore, the fragrance dispenser has the lowest possible energy consumption despite using an active dispensing unit.

[0026] Various embodiments of the invention are described in more detail below.

[0027] According to one embodiment, the reservoir is designed as a cartridge comprising a fragrance container that can be closed with a lid and contains the porous structure, which is preferably a fleece wettable with fragrance. In general, a fleece can also be described as a body consisting of a fabric- or sponge-like material and thus to a certain extent elastic. However, highly porous solids such as sintered materials or so-called "nanosponges" can also be used advantageously. The advantage of a fleece lies in its simple and very cost-effective availability; particularly with regard to non-refillable cartridges, such a material can be disposed of without problems.

[0028] According to one embodiment, the drive of the fragrancing device comprises a gear mechanism configured to selectively open a single valve or close all valves. For an explanation of this feature, reference is made to the description below.

[0029] According to one embodiment, the valve can be moved into the working position from the outside by means of a tappet. This means that the valve cover can be moved from outside the cartridge into the interior, whereby air enriched with fragrance in the cartridge can escape and unscented air can be introduced. The tappet is preferably designed to be centered with the valve cover so that the valve is actuated reliably and in the intended manner and does not jam. This can be achieved, for example, by a combination of a tip and a matching recess, or by guidance via interlocking surfaces on the outside of the tappet and the edge of the opening.

[0030] The tappet is preferably designed to move (at least substantially) in the direction of the valve's longitudinal axis.

[0031] According to a further embodiment, the valve is arranged in an inner cavity of the porous structure. This means that the porous structure surrounds the valve (or its valve cover, at least in its working position). A fragrance agent is located on the inner wall of the cavity, which comes into contact with the air and enriches it with fragrance. In other words, the valve (or the valve cover) is "immersed" in a cavity provided for this purpose in the porous structure.

[0032] The advantage of this design is that the valve, which is located below the opening, can come into contact with scented air from all directions in the working position, so that the release of actually scented air from the cartridge is even and as efficient as possible.

[0033] The idea is that the valve (or more precisely the valve cover) only releases a part of the wall of this cavity into which the valve cover is "immersed" in the working position, which communicates with the opening, so that the air in the corresponding free space can be enriched with fragrance and extracted from it. If the valve is in the rest position, either the possibility of communication between the free space and the environment (through the opening) is prevented, and / or the valve reduces the size of the free space in such a way that evaporation of fragrance is no longer possible.

[0034] Preferably, the fragrancing device implements both mechanisms (closing the opening and reducing the size of the free space). This ensures particularly efficient prevention of scented air from escaping from the cartridge, since, on the one hand, hardly any such air is created, and, on the other hand, it is prevented from escaping.

[0035] According to a further embodiment, a support structure is arranged between the valve and the porous structure, which support structure is designed to be continuous for gas at least in the region of the part of the wall of the cavity that communicates with the opening. Accordingly, the valve does not contact the wall directly, but is inserted into a hollow body, the outer wall of which is then in contact with the porous structure. Particularly when a fleece is present, this hollow body improves its dimensional stability and prevents the moving valve (or the valve cover) from undesirably changing the shape of the fleece or from pushing the fleece between the valve cover and the opening.

[0036] To allow the fragrance to continue evaporating in the air, the support structure should have appropriate openings. These could be holes, for example, or the support structure could be constructed as a grid.

[0037] It is sufficient if the openings only border on the part of the wall of the cavity that can communicate with the opening when the valve is open (free space).

[0038] It should be noted that the described cartridge with internal valve can be advantageously combined with the other components of the fragrance device described in this document; however, it can also be used in a device different from the present fragrance device.

[0039] According to another embodiment, the fragrancing device comprises exactly one drive for actuating the valve(s), which reduces complexity and susceptibility to errors.

[0040] The transmission preferably comprises a camshaft, which particularly preferably has a number of cams corresponding to the number of valves. The cams are designed to actuate the respective (valve) tappet directly or by means of a lever deflectable by them, wherein the camshaft has at least one working position corresponding to the number of valves, in which exactly one of the valves can be actuated, and a rest position in which all valves can be closed.

[0041] In other words, when the camshaft rotates, all of the valves present are actuated individually one after the other so that the corresponding fragrance is "selected", followed by a final position in which all of the valves are closed. This can be achieved by having three cams (with three cartridges) which are offset by an angular distance of 90 degrees. This ensures that the valves are particularly easy to control and at the same time it can be ensured that no energy needs to be supplied in either the active or the "standby" position. This reduces energy consumption considerably and increases safety because if the energy source runs out (e.g. due to the fragrance device not being used for a long time) all of the valves remain closed.

[0042] Preferably, the plunger is located at a distal end of a lever, the proximal end of which interacts with the respective cam. This allows for a mechanical amplification of the force available to actuate the valve.

[0043] It should be noted that the described drive or components thereof (camshaft, lever, tappet, ...) can be advantageously combined with the other components of the fragrance device described in this document; however, a combination with another device different from the present fragrance device is also possible.

[0044] Preferably, each cartridge can be inserted into the housing from below into a holder designed to accommodate it. In this way, a uniform top surface of the fragrancing device can be maintained; a special cover can be dispensed with, since it is irrelevant that the cartridges are visible from below.

[0045] According to a preferred embodiment, each holder has a spring on its upper side which acts against the cartridge. This spring therefore tries to press the cartridge out of the holder, which makes it easier to remove it. To hold the cartridge in place, the holder also has a holding mechanism which interacts positively with the cartridge and can be actuated from below, and with which the cartridge, once inserted into the holder, can be released again. The holding mechanism can, for example, have a hook which interacts positively with a projection or recess in the cartridge. When actuated, the hook is pivoted out of the projection or recess, so that the cartridge is released; the spring supports this process and at the same time ensures that the cartridge, once inserted, remains in the holder after it has been locked, since the hook is pressed firmly against the cartridge.

[0046] The fragrancing device preferably comprises a fan arranged in the housing as a delivery unit. This fan is preferably adjustable and battery-operated. In this way, the amount of fragrant air can be regulated, and the fragrancing device can be operated in a mobile manner without a mains connection.

[0047] Particularly preferably, the fan is arranged centrally in the housing and directed upwards into a distribution chamber, from which spiral-shaped flow channels extend, lying essentially in the same plane. Such channels create a centrifugal effect, which supports turbulence, mixing, and uniform distribution in the designated part of the housing interior. These flow channels communicate downstream, first with the openings of the cartridges, where they are enriched with scented air. Since the air flows directly from the

[0048] Since the air extracted from cartridges has a strong fragrance concentration, it is advisable to mix it with fresh ambient air. After enrichment, the scented air then leaves the housing.

[0049] Character description

[0050] The invention is explained below by way of example with reference to figures.

[0051] Figure 1 is a sectional view through an embodiment of a reservoir with an internal valve in the rest position;

[0052] Figure 2 shows the reservoir according to Figure 1 in the working position;

[0053] Figure 3 is a perspective view of the components used to operate the valves, with one valve open; Figure 4 is the components of Figure 3, with all valves closed;

[0054] Figure 5 is a perspective view of some components, together with the cartridge holder;

[0055] Figure 6 is a sectional view through the inventive

[0056] scenting device;

[0057] Figure 7 is a schematic view of the flow channels.

[0058] Figure 1 shows a sectional view through an embodiment of a reservoir with an internal valve associated with it in the rest position.

[0059] The reservoir 2 serves to store liquid fragrance (not shown). The valve 3 serves to selectively open and close the reservoir 2; in the rest position shown, the opening 7 of the valve 3 is closed.

[0060] The reservoir 2 is designed as a cartridge comprising a fragrance container 9A that can be closed with a lid 9B. The opening 7 is arranged in the lid 9B.

[0061] Located in the reservoir 2 is a dimensionally stable and porous structure 6 in which the fragrance is stored (not shown). In other words, the porous structure 6, which in this case is designed as a fleece, absorbs the fragrance so that the fleece is essentially completely wetted with fragrance. The remaining part of the reservoir 2 may well initially contain more fragrance, which is gradually absorbed by the fleece during operation until all of the fragrance is used up.

[0062] The valve 3 can be moved into the working position, shown in Figure 2, from the outside by means of a tappet 10. Centering means in the form of a tip 11 and a recess 12 aligned therewith are also provided on the tappet 10 and valve 3, respectively, so that reliable actuation of the valve cover (no reference symbol) is possible. The tappet 10 works against a compression spring (no reference symbol) arranged beneath the valve cover. For better sealing, an O-ring (also no reference symbol) is arranged between the valve cover and cover 9B.

[0063] The compression spring is preferably supported, as shown, on the bottom of the reservoir 2, so that at all times a stable and unchangeable abutment is provided for the end of the compression spring opposite the valve cover, in particular one that is independent of the shape, nature and filling of the structure 6.

[0064] As can be seen, the valve 3 is located in an inner cavity of the porous structure 6, thus being almost completely surrounded by it. The inner wall 13 of the cavity is therefore initially surrounded by liquid fragrance. When this comes into contact with air, it evaporates and enriches the air with fragrance.

[0065] If the valve 3 is now in the working position, as shown in Fig. 2, a free space 14 is created above the pressed-down valve cover. This is fluidically connected to the opening 7, i.e. ambient air which passes by the opening 7 will entrain the scented air in the free space 14 due to the suction effect, and unscented air will flow into the free space 14. The higher the speed of the ambient air, the more intensive the exchange. As can be seen, the valve 3, or more precisely the valve cover, (only) exposes a part of the wall 13 of the cavity which communicates with the opening 7 when it is in the working position. Only then can the air in the free space 14 be enriched with scent and extracted from it.

[0066] In the present case, a support structure 15 is arranged between valve 3 and porous structure 6. In the example shown, this is designed to be integrated with the base 9A. In this way, fragrance which is located in the lower region of the reservoir 2 cannot flow into the valve chamber. According to an embodiment not shown, the support structure 15 is manufactured to be integrated with the lid. The support structure 15 is then preferably designed to be continuous in the region of the part of the wall 13 of the cavity for gas which communicates with the opening 7, for example by means of a pattern of holes. Fragrance can therefore flow from the fleece through the support structure 15, reaches the free space 14 (provided the valve 3 is in the working position), and enriches the air present there with fragrance. It can then be continuously removed from the free space 14 and mixed with the ambient air flowing past.

[0067] In this case, the compression spring is also located within the space provided by the support structure 15. It is additionally protected from lateral breakaway by a centering wall 15B arranged on the floor inside the compression spring and connected thereto, and is thus securely guided. Optionally, the valve 3 has a guide 15C located within the centering wall 15B. According to embodiments not shown, the reservoir has no centering wall 15B, and / or the valve 3 has no guide 15C; these features are therefore optional.

[0068] The liquid volume of the cartridge shown is approximately 15 ml. The cartridge has a roughly circular ring shape, with the angle of the section being approximately 45°. In this way, several cartridges can be arranged around a common center, as shown in the following figure.

[0069] Figure 3 shows a perspective view of the components used to actuate the valves 3 (not shown), with one valve 3 (front left in the image) open. The three reservoirs 2 are arranged around a common center (only the two front reservoirs 2 are shown, and these are shown only schematically). In Figure 4, all valves 3 are closed. Also shown is the gear 8, via which the drive 4 actuates the valves 3. The gear 8 in this case comprises a camshaft 16, with the cams (without reference number) being designed to actuate the respective tappet 10 by means of a lever 17, so that a corresponding power amplification is achieved. The camshaft 16 has a number of working positions corresponding to the number of valves 3. Exactly one of the valves 3 can be actuated in each of the working positions. For this purpose, the cams are offset by 90 degrees to each other, ie, if one cam points upwards, the next one points to the side, and the third cam points downwards, etc. In addition, there is a rest position (see Fig. 4) in which all valves 3 are closed (no cam points upwards, all tappets 10 are in their upper end position). In this position, none of the cams is aligned such that it actuates the corresponding lever 17 and opens the associated valve 3, or all cams are aligned such that all valves 3 are closed. In the present case, this is achieved by the cams (more precisely: their tips) pointing to the side or downwards, i.e. away from the respective tappet 10.

[0070] Figure 5 shows a perspective view of some components of the fragrancing device 1, along with the cartridge holder, viewed diagonally from below. Each cartridge is inserted from below into a holder 18 designed to accommodate it in the housing 19.

[0071] Each holder 18 has a spring 20 on its upper side that acts against the cartridge and is designed as a leaf spring in the present case. Furthermore, a holding mechanism 21 is provided, which interacts positively with a recess 23 in the cartridge via a hook 22. When the hook 22 pivots out of the recess 23, the recess is released, and the spring 20 presses the cartridge slightly out of the holder 18. Conversely, the engaged hook 22, together with the spring 18, ensures that the cartridge cannot become detached during operation of the fragrance device 1. The holding mechanism 21 can be actuated from below by pressing the trigger 24 integrated therein.

[0072] In Fig. 5, but particularly in Fig. 6, which shows a sectional view through the scenting device 1, the arrows without reference symbols indicate the air flow. In the base area, the fan (shown in dotted lines, without reference symbol) which is included in the dispensing unit 5 and serves to move the air can be seen. This fan is positioned centrally in the approximately barrel-shaped housing 19 and initially sucks in ambient air from below the housing 19. It is directed upwards into a distribution chamber 25. Establishing from this distribution chamber are spiral-shaped flow channels 26 which each communicate downstream initially with the openings 7 of the cartridges before leaving the housing 19.As they flow past the openings 7, they create a suction effect which causes the fragrance-enriched air located in the free space 14 (not shown separately) of the reservoir 2 to be drawn out of the free space 14 and replaced by unscented air. The area of ​​the flow channels 26 downstream of the openings 7 is again designed to be fluidically connected, resulting in further mixing of scented and unscented air. The mixed, scented air finally leaves the scenting device 1 through slots 27 on the upper edge of the housing 19.

[0073] Figure 7 schematically indicates the spiral course of the flow channels 26. In particular, it can be seen that the region 26B of the openings 7 downstream of the latter is designed to be continuous, in this case annular. The slots 27 are not shown here. List of reference symbols

[0074] 1 scenting device

[0075] 2 reservoirs

[0076] 3 valve

[0077] 4 Drive

[0078] 5 Application unit

[0079] 6 porous structure

[0080] 7 Opening

[0081] 8 gearboxes

[0082] 9A Fragrance container

[0083] 9B lid

[0084] 10 pestles

[0085] 11 top

[0086] 12 Deepening

[0087] 13 Wall

[0088] 14 Free space

[0089] 15 Support structure

[0090] 15B Centering wall

[0091] 15C Guided Tour

[0092] 16 Camshaft

[0093] 17 levers

[0094] 18 Bracket

[0095] 19 housings

[0096] 20 springs

[0097] 21 Holding mechanism

[0098] 22 hooks

[0099] 23 Recess

[0100] 24 triggers

[0101] 25 Distribution room

[0102] 26 , 26B flow channel

[0103] 27 slots

Claims

Patent claims 1. Fragrance device (1) for dispensing at least one liquid fragrance, the fragrance device (1) comprising at least one reservoir (2) for storing fragrance, a valve (3) for selectively opening and closing the respective reservoir (2), at least one drive (4) for actuating the valve(s) (3), and a Application unit (5) for the active application of fragrance-enriched ambient air, - wherein at least one fragrance wets a dimensionally stable and porous structure (6) located in the corresponding reservoir (2) or is at least partially stored therein, the surface of which is at least partially temporarily exposed to the ambient air; wherein - the fragrancing device (1) comprises, for each reservoir (2), a valve (3) associated therewith, which closes an opening (7) of the reservoir (2) in a rest position and opens it in a working position; characterized in that the valve (3) is positioned inside the cartridge in order to selectively close the opening (7) in the rest position or to open it in the working position.

2. Fragrance device (1) according to claim 1, wherein the reservoir (2) is designed as a cartridge which comprises a fragrance container (9A) which can be closed with a lid (9B) and in which the porous structure (6) such as in particular a fleece wettable by fragrance is contained.

3. Fragrance device (1) according to claim 1 or 2, wherein the drive (4) comprises a gear (8) which is designed to selectively open a single valve (3) or to close all valves (3).

4. Fragrance device (1) according to one of claims 3 to 3, wherein the valve (3) can be brought into the working position from the outside by means of a tappet (10).

5. Fragrance device (1) according to one of the preceding claims, wherein the valve (3) is arranged in an inner cavity of the porous structure (6) and only in the working position releases a part of the wall (13) of this cavity communicating with the opening (7), so that air in the corresponding free space (14) can then be enriched with fragrance and removed therefrom.

6. Fragrance device (1) according to claim 5, wherein a support structure (15) is arranged between the valve (3) and the porous structure (6), which support structure is designed to be continuous for gas at least in the region of the part of the wall (13) of the cavity communicating with the opening (7).

7. Fragrance device (1) according to one of the preceding claims, wherein the same comprises exactly one drive (4) for actuating the valve(s) (3), and the gear (8) comprises a camshaft (16), wherein the cams are designed to actuate the respective tappet (10) directly or by means of a lever (17), wherein the camshaft (16) has at least one number of working positions corresponding to the number of valves (3), in which exactly one of the valves (3) can be actuated, and a rest position in which all valves (3) can be closed.

8. Fragrance device (1) according to one of the preceding claims, wherein each cartridge is inserted from below into a holder (18) arranged to receive the same in a housing (19) can be inserted.

9. Fragrance device (1) according to claim 8, wherein each holder (18) has on its upper side a spring acting against the cartridge (20), and a holding mechanism (21) which cooperates positively with the cartridge and which is can be actuated, and with which the cartridge inserted into the holder (18) can be released again.

10. Fragrance device (1) according to one of the preceding claims, wherein the same comprises a fan arranged in the housing (19) as the application unit (5).

11. Fragrance device (1) according to claim 10, wherein the fan is arranged centrally and directed upwards into a distribution space (25) is directed into which a centrifugal effect producing spiral flow channels (26) which communicate downstream first with the openings (7) of the cartridges and then leave the housing (19).

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