DE8432381U1 - SUCTION DEVICE FOR TOILET POOL - Google Patents

Description

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* ft Il c.rttf It « S. Authorized representative at Patent attorney Mülbergerstrasse 65 European Patent Office Dipl.-Ing. Volkhard Kratzsch. D-7300 Esslingen Deutsche Bank Esslingen 210906 Telephone Stuttgart (0711) 317000 Post office Stuttgart 10004-701 cable «krapatent» esslingenneckar

Helmut Albrecht 7440 Nürtingen

October 31, 1984 Lawyer File 3601 "

Suction device for toilet bowls

The invention relates to a suction device for toilet bowls, one of which is driven by a preferably electric drive motor for extracting air Has air from the toilet bowl.

In known suction devices of this type (DE-OS 25 47 496, 30 49 962) the drive motor with exhaust fan is connected with its outlet end to a special exhaust duct, which leads outside from the toilet room. With the entry end, it is used for suction Channel connected to a suction part, which is placed in the area of the toilet seat and contained therein Vacuum openings around the toilet bowl.

Such suction devices require special arrangement Exhaust ducts, which is extremely complex and expensive and by no means can you set yourself up in all rooms, e.g. not in such spatial conditions, in which the toilet room has no immediate outer wall, ceiling or the like leading to the outside. Has. Apart from that of these, the suction devices are also relatively complicated, sensitive to interference and, in some cases, unattractive because they are bulky are very noticeable from the outside step.

The invention is based on the object of creating a suction device of the type mentioned at the outset that is simple and is inexpensive, is suitable for all conceivable spatial conditions, especially for retrofitting Installation, which is space-saving and inconspicuous in its external appearance.

In the case of a suction device of the type mentioned at the outset according to the invention, the object is achieved by the features in the characterizing part of claim 1.

The invention makes existing piping for the suction and use pipe parts and channel sections of the toilet facility with water flushing. This makes them special Additional connections and therefore channels or pipelines are unnecessary. This not only leads to extraordinary low cost, but above all has the advantage of small structural dimensions, so that the invention Extraction device can also be installed in very confined spaces. Also a subsequent one Nothing stands in the way of installation with existing toilet facilities. Because the from inside the toilet bowl Air extracted via the suction line is released into the channel to which the toilet bowl is connected there is no need for any special additional air discharge ducts to be installed. This is the suction device Can still be used even with such spatial conditions, where there are any direct outer walls of the toilet room miss. At the same time, the Suction device functionally reliable and easy to maintain, because easily accessible.

An advantageous embodiment results from the claim 2. Such a low-voltage drive motor poses no risk from the electrical side. aside from that such a drive motor is small, light and inexpensive. A drive motor can be used which

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e.g. has an input power of 2 W and 15000 rpm. The exhaust fan simply consists of a wheel equipped with one or more blades is. Such a fan wheel is small, light and inexpensive.

Another advantageous embodiment results from Claim 3. This ensures that in the opposite direction to the suction direction not about pipe gases, depending on the individual case also liquid, can flow back. The suction device is thus backflow-proof, both with respect to Gases as well as liquids.

Another advantageous embodiment results from Claim 4. In this arrangement, the exhaust fan is designed as an axial fan with an axial flow direction. The drive motor with suction fan in this way can be easily seen within a e.g. in cross section circular pipe without completely occupying the pipe cross-section. At the same time is thereby the installation and also the removal for the purpose of maintenance are particularly easy. The features according to FIG Claim 5. In the case of a tubular part with a circular cross-section, the holder can, for example, also be tubular, so that the entire unit together with the holder is pushed into the cylindrical tube part. Are beneficial also the features according to claim 6. The wall part can be part of the holder or in the Pipe part be attached, the bracket with drive motor and exhaust fan being attached to the wall part is.

Another advantageous embodiment results from Claim 7. Here the wall style also functions as a Barrier that blocks off part of the pipe cross-section, which can still be used for a water and / or gas barrier can be. The features in claim B is a

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particularly easy accessibility to the drive unit given, whereby maintenance, cleaning etc. are particularly easy.

Should the suction power of a drive motor with suction fan not enough, the embodiment according to claim 9 is advantageous in order to reduce the suction power to this Way to increase.

Further advantageous features emerge from claims 10-13, whereby the switching on and off of the Drive motor is particularly simple and reliable.

The features in claim 'i4 ensure that the entire suction device is a complete, tradable and movable, ready-to-install unit that only connects to the existing pipes or Channels required. In this way, even with existing toilet facilities, there is no difficulty and large Effort to retrofit with the suction device according to the invention possible.

Another advantageous execution farm that the Second alternative of claim 1 subordinate, see from claims 15 to 18. In this case leads the suction line is only air because it is not connected to the flushing line. Including the additional suction part I can use the suction device in this configuration particularly good for retrofitting toilet facilities with the inventive suction device. Since the inlet end of the suction line is connected to the suction part but not to the flushing line, no extra connection is required at this end of the suction line. Rather, only the suction valve needs to be placed on the upper edge of the toilet bowl are placed, with the backup can be done with the same mounting elements who also attached the toilet seat to the toilet seat .. ', st. Additional fasteners are also available

possible. The suction part can consist of a hose part or flat, approximately box-shaped element exist for is sufficiently rigid that it does not collapse under suction. A design in plastic is possible.

It goes without saying that all elements of the suction device according to the invention, apart from the electrical Drive motor, made of plastic.

Another advantageous embodiment results from claim 19 as well as claims 20 and 21. Here the inlet end of the suction line is on an independent one Suction opening connected in the toilet bowl, whereby also here the suction line only carries air.

Another advantageous embodiment results from claim 22 and 23. This embodiment is particularly advantageous when the suction line with its The inlet end is connected to the flushing water line, because then flushing water from the flushing pipe during each flushing process is also flushed into the suction line, which fills the odor trap again and activates it. Included it goes without saying that the cross section of the suction line in the area of the inlet end, where the confluence with the Flushing line takes place, significantly smaller than the flushing pipe cross-section can be. Through the odor trap 3 a backflow of gases from the channel in the opposite direction to the suction direction is prevented in a particularly simple manner. In everything, the odor trap is formed extremely simply by a clever pipe run.

Another advantageous embodiment of a water and / or gas barrier results from claim 24, with further advantageous designs in the claims 25 to 2Θ are included. Such a backflow flap

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is suitable for both alternatives, i.e. on the one hand the one in which the suction line also leads water from the flushing line, and on the other hand for those at which the suction line, as it has an extra suction connection, only carries air.

Further details and advantages emerge from the following description.

The complete wording of the claims is not given above solely to avoid unnecessary repetition reproduced, but only referred to by naming the claim number, which, however, all Claim features are to be considered expressly disclosed at this point and essential to the invention.

The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawings. Show it :
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1 shows a schematic side view of a toilet bowl suction device according to a first exemplary embodiment,

2 shows a schematic, partially sectioned 25

Front view of the toilet bowl suction,

Fig. 3 is a schematic plan view of the toilet bowl suction in Fig. 2,

4 shows a circuit diagram of the electrical power supply,

5 shows a schematic plan view of part of a toilet bowl suction device according to a second embodiment,

6 is a schematic, partially sectioned

Side view of a toilet bowl extraction according to a third embodiment,

7 shows a detail of the toilet bowl suction device in FIG. 6 in an axial longitudinal section and on a larger scale.

The toilet facility shown in Fig. 1 to 3 has a conventional cistern 10, of which a flush pipe 11 is led to the toilet bag 12, via the when the flush is actuated in the cistern 10, water stored in the cistern 10 is passed to the toilet bowl 12 being, with the water there via channels within of the toilet bowl 12 reaches its interior 13.

The toilet bowl 12 is in a conventional manner, as is only indicated by dashed lines in FIG. 3, via a odor seal 14 connected to a sewer pipe 15, which in turn with the not further visible, running in the ground Downpipe is in communication, which is connected to the pipeline leading to the sewer. That when actuated The rinsing water flowing into the interior 13 is thus released from the interior 13 via the odor trap and the Sewage pipe 15 discharged into the downpipe. In this respect, the toilet facility corresponds to a conventional one .

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According to the invention, a suction device 20 is provided, by means of d, air can be sucked into the sewage pipe 15 from the interior 13 of the toilet bowl 12. the Suction device 20 has a suction fan 22 driven by means of an electric motor 21. The electric motor 21 is low voltage on the order of B to 24 V fed via a supply line 23 with a switch 24 connected in series therein. The supply line 23 is connected to the secondary side of a power supply 25, which via a cable 26 to the household network with e.g. 220 volts AC is connected. The power supply unit can have a control lamp 27 and an actuator 28.

The exhaust fan 22 is by one on the motor shaft 29 of the electric motor 21 non-rotatably arranged fan blades formed. The electric motor 21 is with its housing in a holder 30 is foamed in, which is indicated by the layering 31. The holder 30 has a wall part 32, on which the electric motor 21 is firmly attached.

The suction device 20 is arranged within a suction line 33, one end 34 of which into the sewer pipe 15 opens and is connected at its other end 35 to the channel that connects to the interior 13 of the toilet bowl 12, for the supply of the flushing water from the cistern 10, is in communication. When shown In the exemplary embodiment, the end 35 of the suction line 33 is connected to the flushing pipe 11, namely above there of the confluence area into the water outlets integrated in the toilet bowl 12.

The suction line 33 contains in the course of this line an odor trap 36 and furthermore the electric motor 21 with suction fan 22. Both are located in a pipe part 37, e.g. a pipe section 38 is connected to the sewer pipe 15. One opens into the tube part 37 with the end 35 the flushing pipe 11 connected, e.g., a knee-shaped pipe section 39, which protrudes with its pipe end 40 into the interior 41 of the pipe part 37 and thus the odor trap 36 forms.

If one considers only the suction line 33 with the electric motor 21 and the suction fan 22 contained therein, it is evident that when the switch 24 is closed, the electric motor 21 is excited and thereby drives the suction fan 22. As a result, any water located in the interior 41 is discharged from the pipe part 37 via the pipe section 38 and the end 34 into the sewage pipe 15. At the same time, through the pipe section 39 and the flush pipe section 11 '', which is connected to the integrated openings of the toilet bowl 12 that are connected to the interior 13. Air is sucked out of the interior 13 of the toilet bowl 12, which passes through the pipe section 39, the interior 41 of the pipe part 37 into the pipe section 38 and from there into the sewer pipe 15. The suction device 20 is thus aspirate 12 of air capable of taking advantage of the existing pipes, namely the Spülrohrec 11 with washout 1V, which leads up to the toilet bowl 12, as well as of the sewer pipe 15, from the inside 13 of the toilet bowl and in dac existing sewer pipe 15 to give off without this air getting into the environment or into the open air.

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-ΙΟΙ In this way, by means of the suction device 20 hygienic, non-polluting direct suction from the interior of the toilet bowl 12 is created.

The odor trap 36 in the pipe part 37 has the effect that in the opposite direction from the sewer pipe 15 not about pipe gases rise and into the pipe section 3S, the flushing pipe section 11 ', the interior 13 of the toilet bowl 12 and thus can get into the interior of the toilet. 10

As can be seen from Fig. 2, the wall part 32 is erected transversely to the longitudinal direction of the tubular part 37, this being However, wall part 32 does not completely fill the cross-section of pipe part 37, instead a space 42 remains, which is necessary so that there is water in the interior 41, but above all that from the interior 13 of the toilet bowl 12 sucked air, can get from the interior 41 into the pipe section 38 and from there into the sewer pipe 15.

During the flushing process, water is flushed from the cistern 10 into the toilet bowl 12 in a conventional manner is, the odor trap 36 is refilled with water so that it can fulfill its function.

The pipe part 37 can be at least at one end, e.g. Fig. 1 to 3 right end, a removable cover 43 for cleaning the odor trap 36, for assembly of the electric motor 21 with exhaust fan 22, for maintenance and repair purposes or the like. exhibit. Fig. 3 shows that the pipe part 37, viewed in plan view of above, obliquely, from the cistern 10 to the left and obliquely to the front. It goes without saying that the Pipe part 37 at the same time or instead also within a vertical plane, that is to say the plane of the drawing according to FIG. 2, can run obliquely, wherein the angle of inclination can be adjustable, such that a highly effective odor trap 36 is formed and nevertheless the suction through

the suction line 33 can take place unhindered in the direction of arrow 44. It goes without saying that the suction line 33 can be composed of a continuous line part or of several individual pipe sections, as shown, which are each joined together to form a suction pipe that is tight to the outside, the individual pipe sections being adapted to the corresponding structural conditions _{<can be} shaped and run.

The drive unit, consisting of electric motor 21 with exhaust fan 22, can be used as a complete part together with the Bracket 3D be inserted into the pipe part 37 with a seal on the foot side, in such a way that a lighter Exchange is possible. The electrical supply line 23 is through the suction line 33 at a suitable point passed through to the electric motor 21, with a fully insulating implementation. The electric motor too 21 is electrically insulated from the water inside 41.

The switch 24 is connected in series with the electric motor 21 and is normally open. He is either as Contact switch formed, which is placed e.g. between the seat and the toilet bowl 12 and at The load on the seat goggles switches on and switches off when the load is removed. A pressure switch is suitable for this. Even a visible hand switch for manual operation is possible instead. Similarly, the switch 24 also consist of a remote switch, e.g. a light barrier or a thermal switch, both without mechanical Switch contacts.

It is also not shown that, in series with switch 24, there is another, hidden on / off switch as a child safety device can be attached, which must also be operated by hand by knowledgeable users.

The actuator 28 in the power supply unit 25 indicates that an adjustment of the power of the electric motor 21 with Extraction fan 22 is possible by hand, whereby the suction effect can be adjusted in terms of strength. 5

In addition, a timer 45, e.g., a timing relay, may be switched on in the circuit (Fig. 4). Using the timer 45 can be manually set a lead time so that the timer 45 by closing the switch 24 is triggered and then expires and only a switching pulse itself after the set lead time has elapsed to turn on the electric motor 21 emits. The switching impulse can be applied to an electromagnetically operated shut-off valve 46 act, which is arranged within the water inflow from the water tank 10 to the toilet bowl 12, so that a flush can be achieved with the switch 24 closed after the lead time has elapsed, e.g. even during the seat glasses are loaded.

The timer 45 can also be adjustable with regard to its running time, so that the time duration can also be adjusted Excitation of the electromagnet can be specified until it automatically drops and closes.

The suction device 20 is particularly simple and inexpensive. Oa the suction and discharge into the sewer pipe 15 happens into it, an annoying agglomeration of smells is prevented. Since the suction through the interior 13 of the toilet bowl 12 happens through, a disruptive local draft is prevented.

When the switch 24 is arranged between the seat and toilet bowl 12, the suction is loaded with the Seat glasses switched on and switched off with relief. Bsi a light barrier or a thermal switch takes place the switching cycle accordingly when passing the barrier.

If you want a trailing suction after discharge of the Reach seat glasses, this can also be done via the timer 45 with an adjustable delay time.

If the timer 45 for the automatic opening of the Flushing is provided, a special timer with after-run setting for the suction is not necessary »because then the water rinse continues while the seat is loaded, so that after the seat is relieved and flushed toilet bowl 12 an after-run of the suction no longer »- is necessary.

It is advantageous that the suction, since it takes place inside, does not develop any large drafts of air and therefore does not there is no risk of a cold associated with it. This is also due to the fact that the suction flow is not extremely strong and can also be adjusted manually via the actuator 28. It will also run along the entire The course of the toilet bowl rim inside 13 is suctioned off. So there is a uniform suction that leads to practically no suction and no stronger, disruptive air flow.

By supplying the electric motor 21 with low voltage on the order of between 6 and 24 volts no danger on the electrical side. The device takes up little space and does not interfere. The entire suction device 20 including the connections to the flushing pipe 12 on the one hand and the sewage pipe 15 on the other hand can be contained in a closed box 19 as a commercial complete unit that only includes the connection in the area of the two ends 34 and 35 is required.

In the second embodiment shown in FIG oind for the parts that correspond to the first embodiment correspond to 100 larger reference numerals used, so that to avoid repetition of the description of the first embodiment is referred to.

In the second embodiment, the suction line is which is not shown further here, connected to a special suction part 150 with a pipe part. The suction part 150 is detachably attached to the toilet bowl 112. It rests on the upper edge of the toilet bowl 112, it is placed and secured between the upper edge and the not further visible toilet seat.

Holes 151 can be used to secure, for example are penetrated by the same fastening bolts, by means of which also the toilet seat is attached to the toilet bowl 112. The suction part 150 only extends over the rear section of the toilet bowl 112.

It is adapted to that of the toilet bowl 112 with regard to the inner and outer edge contour. On the for Inside 113 of the toilet bowl 112 facing the inside of the suction part 150 is provided with air inlet openings, that are not visible. The air inlet openings can of slots, perforation openings, inlet bores or the like. exist. The suction part 150 is a plastic molded part, the height of which is such that the suction part 150 interference-free in the space between the upper edge of the toilet bowl 112 and the non-visible Toilet seat fits.

The third embodiment in FIGS. 6 and 7 differs differs from the first embodiment by, on the one hand, that the pipe part 237 containing the drive motor 221 with drive fan 222 is substantially close to the upper one The edge of the toilet bowl 212 runs when shown

Embodiment in Fig. 6 still above the point at which the flushing pipe 211 is connected to the toilet bowl 212. The suction line 233 is in this third exemplary embodiment not connected to the flushing pipe 211 and therefore not connected to the water flush. Much more the suction line 233 opens with the end of its pipe part 237 into a suction opening contained in the toilet bowl 212 a, which thus forms a special air suction connection. Another difference is that in the third embodiment, the electric drive motor 221 with suction fan 222 is arranged in the pipe part 237 and near the suction opening of the toilet bowl 212 is. Fig. 6 shows that the drive motor 221 with exhaust fan 222 in this design even finds space within the cross-sectional area of the toilet bowl 212, but this is not mandatory.

Another difference to the first embodiment consists in the formation of the water and / or gas barrier.

This can also according to the first embodiment FIGS. 1-3 may be designed in the same way as in the third exemplary embodiment in FIGS. 6 and 7. This embodiment the water and / or gas barrier is therefore not tied to the type of suction line.

The water and / or gas barrier is designed as a backflow flap. The backflow flap 260 is within the Pipe part 237 is pivotably mounted by means of a joint 262 located at the top. The suction flow is indicated by arrows 244 indicated. It can be seen that the backflow flap 260 by means of the suction flow running in the direction of arrow 244 of the suction fan 222 is opened in the suction flow direction, the backflow flap 260 automatically can fall into its closed position in the opposite closing direction. This automatic provision in the closed position, for example, solely due to the weight of the backflow flap 260

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weight forces take place. In addition, as is not further shown, a special spring ar can act on the backflow flap 260, which resiliently loads the backflow flap in the closed position, in the opposite direction to arrow 244, and moves it in the opposite direction into the closed position when the suction flow drops in the direction of arrow 44. The piece storage flap 260 is seated on a box-shaped or tubular holder 230, which is pushed into the tubular part 237 with an accurate fit and is fixed in place there. The inside of the holder 230 accommodates the drive motor 221, which is attached to it, for example, by means of radial spokes, rods, bolts or the like. is fixed. At the right end of this holder 230 in FIG. 7, the backflow flap is attached

260 held by means of the joint 262. Between the

A seal 263 can also be located at the end of the holder 230 and the backflow flap 260.

Instead of this seal 263, a similarly shaped magnetic element can also sit in the same place, wobai then the backflow flap 260 is designed as a magnetizable plate.

Instead, another variant is indicated by dashed lines in FIG. 7, in which the backflow flap 260 adjacent, within the holder 230, a magnet

261 is located, which is placed in a stationary manner within the holder 230. The magnet 261 can be designed as a permanent magnet be. In another embodiment, it is designed as an electromagnet, its excitation coil is not shown further and is connected to the same supply circuit as the electric drive motor 221 is, but is switched on and off in the opposite direction to this.

The magnetic force of the magnet 261 at least causes the backflow flap 260 in the position shown in FIG is held closed position shown. Depending on the force of the magnet 261, this can also be used with

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lifted backflow flap 26G a magnetic »

Closing force au-F the backflow flap 2BO in such a way;

practice that under the influence of this magnetic closing I "

force the backflow flap 260 back into the closed position- ^

is moved. > · ■ <

In another, not shown embodiment - · _4, the water and / or gas barrier of a conventional check valve or another backwater herkSmmliehen lock. ? '

Claims (1)

Expectations 1. Suction device for toilet bowls, one of which is driven by a preferably electric drive motor G21) Suction ventilaior (22) for sucking air from the toilet bowl (12), characterized in that the drive motor (21) has a suction fan (22) is contained within a closed suction line (33), which with its outlet end (34) to the from the Toüettenbeckqn (12) outgoing waste water pipe (15) and with its inlet end (35) either to diB to Toilet bowl (12) leading water flushing line (11) or can be connected to a separate suction connection of the toilet bowl. 2. Suction device according to claim 1, characterized in that the electric drive motor (21) is designed as a low-voltage motor, which via an electrical power supply unit (25) with low voltage in particular is fed between 6 and 24 volts. 3. Suction device according to claim 1 or 2, characterized characterized in that the suction line (33), seen in the air flow direction behind or preferably in front of the exhaust fan (22), one in the direction of air flow permeable and oppositely blocking water and / or gas barrier. -2- Suction device according to one of Claims 1-3, characterized in that the suction line (33] has a straight line section (37] in which the drive motor (21] is detachable with an exhaust fan (22) and is arranged in such a way that the motor shaft (29) is at least substantially runs in the longitudinal direction of the line section (37) and the suction fan (22) is oriented transversely to the line section (37). Suction device according to one of Claims 1-4, characterized in that the drive motor (21) foamed with its housing in a holder (30) and with this one preferably ready-to-assemble unit is connected. B. suction device according to claim 5, characterized in that the drive motor (21) together the holder (30) is held on a wall part (32) which is arranged transversely in the line section (37). Suction device according to claim 6, characterized in that that the wall part (32) tightly into the line section (37), forming a barrier is inserted and between the wall part (32) and the wall of the line G section (37) an eccentrically, preferably Above the drive motor (21) with suction fan (22), arranged continuous space (42) is formed. Suction device according to one of claims 4-7, characterized in that the Drive motor (21) with suction fan (22) containing The line section (37) consists of a pipe part which at least at one end is made up of a detachable cover (43) is closed. • ·
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• * · -3- 9. Suction device according to one of claims 4-8, characterized in that the Line section (37) a pipe socket is connected, in which a further, preferably electric, drive motor can be used with a suction fan. 10. Suction device according to one of claims 2-9, characterized in that the electrical The suction power of the drive motor (21) can be adjusted by means of a manually operated actuator (2Θ). T8. Suction device according to one of Claims 2 to 10, characterized by at least one electrical switch (24) in an electrical drive motor (21) leading electrical supply line (23). 12. Suction device according to claim 11, characterized that the switch (24) as a hand switch or foot switch or as between the toilet seat edge and seat goggles arranged, pressure-dependent operating switch, as a contactless actuatable, e.g. light-dependent or temperature-dependent operating switches or the like is designed. 13. Suction device according to one of claims 1 - 12, characterized in that the suction line (33) together with the power supply unit (25) and the line section (37) with the drive motor contained therein (21) and suction fan (22) are arranged inside a ready-to-connect housing (19). 14. Suction device according to one of claims 1 - 13, characterized in that the suction suction line (33) having an inlet end (35) Connection piece for connection to the water flushing -4- line (11) and the outlet end (34) having a connecting piece for connection to the sewer pipe (15). B 15. Suction device according to one of claims 1 - 14, characterized in that the suction line is connected to a suction part with a pipe part (139) (150) is connected, which is detachably attached to the toilet bowl (112). 16. Suction device according to claim 15, characterized characterized in that the suction part (150) rests on the upper edge of the toilet bowl (112), is preferably arranged and secured between this upper edge and the toilet seat. 17. Suction device according to claim 15 or 16, characterized in that the suction part (150) extends only over the rear section of the toilet bowl (12) and preferably the The shape of the pelvis is adapted. 18. Suction device according to one of claims 15-17, characterized in that the .Absaugteil (150) to the interior (113) of the toilet bowl (112) facing and open air inlet openings, in particular Inlet slots, inlet bores, inlet perforations or the like. Has. 19 suction device according to one of claims 1 - 14, characterized in that the Suction line with a pipe part (237) directly into one contained in the toilet bowl (212) as a suction connection serving suction opening opens. 20. Suction device according to claim 19, characterized characterized in that the pipe part (237) runs substantially near the top of the toilet bowl (212). 21. Suction device according to claim 20, characterized °, that the drive motor (221) with suction fan (222) arranged in the pipe part (237) and near the suction opening of the toilet bowl (212) is. 22. Suction device according to one of claims 3 - 21, characterized in that the Water and / or gas barrier is designed as an odor trap (36). 23. Suction device according to claim 22 »thereby characterized in that the odor trap (36) has a transverse into the line section (37), which the Has drive motor (21) with suction fan (22), tubular part (40) leading into it, the interior of which sealed gas-tight at least at the end by means of water located in the interior (41) of the line section (37) is and with the drive motor (21) switched on with suction device (22) with accompanying suction this water is freely accessible for the suction flow. 24. Suction device according to one of claims 3-21, characterized in that the Water and / or gas barrier is designed as a check valve or backflow flap (260). 25. Suction device according to claim 24, characterized characterized in that the backflow flap (260) by means of the suction flow of the suction fan (222) is opened in the direction of the suction flow and automatically in the opposite closing direction in their closed position falls. -B- 26 "Suction device according to claim 25, characterized characterized in that the backflow flap (260) is in the closed position by means of its weight alone falls. 27. Suction device according to claim 25, characterized characterized in that the backflow flap (260) is spring-loaded and by means of the force of this F9der is moved into its closed position. 2Θ. Suction device according to one of claims 24-27, characterized in that the backflow flap (260) is designed as a magnetizable plate and a magnet (261) is adjacent, by means of which the plate magnetically in its closed position is movable, can be held at least in its closed position.