WO2006128719A2

WO2006128719A2 - Drainage channel to be used for sanitation purposes

Info

Publication number: WO2006128719A2
Application number: PCT/EP2006/005291
Authority: WO
Inventors: Thomas Hartung; Reinhold KLÜBER
Original assignee: Aco Severin Ahlmann Gmbh & Co. Kg
Priority date: 2005-06-03
Filing date: 2006-06-02
Publication date: 2006-12-07
Also published as: DE102005025658A1; EP1984578A2; DE102005025658B4; WO2006128719A3

Abstract

What is disclosed is a drainage channel (1) to be used for sanitation purposes, in particular a shower channel, to be installed in a floor (3) so that its surface is substantially flush with a surface covering of the floor, with two side walls (2, 2'), at least one bottom wall (4), an in particular deep-drawn outflow pot (6) that is connected to the bottom wall and serves to receive an odour trap (20), and a circumferential thin-bed flange (8, 8') by way of which a surface covering can be connected to the drainage channel, the wall elements being formed by bending a single sheet of metal. Also disclosed is an odour trap for installation in a drainage channel, in particular shower channel, with an odour-trap pot (22) to receive a sealing water and an odour-trap inlet element (24) that by way of an upper edge (26) can make a releasable, water-tight connection to an outflow pot of the drainage channel and by way of a lower edge (28) can be inserted into the odour-trap pot through an upper side (30) thereof so as to form a labyrinth odour trap.

Description

Drainage channel to be used for sanitation purposes

DESCRIPTION

The present invention relates to a drainage channel for sanitary applications, in particular a channel for showers, to be installed in a floor so that it is substantially flush with the upper surface of a floor covering, with two side walls, at least one bottom wall, an in particular deep-drawn outflow pot attached to the bottom wall to receive an odour trap, and a circumferential thin-bed flange for attachment of a surface covering to the drainage channel.

In addition, the present invention relates to an odour trap to be installed in a drainage channel, in particular a shower drain, with an odour-trap pot to receive a sealing water and an odour-trap inlet element that is releasably attachable by way of a sealing upper edge to an outflow pot of the drainage channel and by way of a lower edge can be inserted into the odour trap through an upper side of the odour-trap pot so as to form a labyrinth odour trap.

The above-mentioned drainage channels and odour traps for drainage channels to be used for sanitation purposes are known from the state of the art and customarily present the problem that their manufacture requires great effort and expense. Furthermore, it has been shown that particularly in the area of sanitation the use of these drainage channels frequently results in a reduced outflow rate and/or to the development of odours, because known drainage channels and odour traps can be cleaned only with great difficulty, or in some cases not at all.

The present invention is thus directed towards the problem of developing a drainage channel or an odour trap of the kind mentioned above so that its manufacture is improved and simplified, the manufacturing costs are reduced and the apparatus can be better employed. This problem is solved by a drainage channel according to Claim 1 and by an odour trap according to Claim 13.

In particular, this problem is solved by constructing a drainage channel of the above- mentioned kind so that the bottom wall, the side walls and the thin-bed flange in the region of the side walls are formed by bending a single sheet of metal.

This problem is additionally solved in particular by an odour trap that comprises at its pot at least one retaining lug and at its inlet element at least one connecting element with a retaining groove, or the reverse arrangement, so that when the inlet element of the odour trap is being inserted into the odour-trap pot, the retaining groove can be brought into releasable locking engagement with the retaining lug.

A substantial advantage of constructing the above-mentioned drainage channel so that its side walls, bottom wall and thin-bed flange are all made from one metal sheet is, among other things, that it can be manufactured very economically and rapidly. It is thus possible, for example, to bring the drainage channel into its final shape with no need for time-consuming welding or similar jointing work. So that this drainage channel can, if necessary, be correspondingly closed on its narrow sides, all that is then necessary is to join on end-face side walls, for instance by welding, which on the whole results in a much more economical manufacturing procedure.

Another advantage resides in the fact that in particular when the drainage channel is installed so as to be flush with the surface, a very much more uniform upper edge of the drainage channel can be ensured, because no partially very rough and irregular welded edges are present here. Especially for sanitary applications such a "round" upper edge is required of a drainage channel, so that in particular injuries associated with walking barefoot are prevented. Furthermore, the outflow behaviour is naturally also improved because of the continuity of the surface, particularly in that the deposition of dirt is avoided.

The drainage channel and/or the odour trap is advantageously made of a metal, and in particular a non-rusting metal such as VA. Because such non-rusting metals place special demands on the welding technique, the integral construction of the drainage channel in the region of the side walls, bottom wall and thin-bed flange results in additional cost savings and more rapid production. However, it is of course also conceivable for the above-mentioned drainage channel to be made of a plastic material, for instance an artificial thermoplastic material.

Preferably the thin-bed flange is spaced apart from the upper edge of the drainage channel in such a way that the surface covering to be attached to an upper side of the flange can be applied so that its upper surface is flush with the upper edge of the drainage channel where it adjoins the latter. The term surface covering is to be understood here as including every floor surface layer preferably used in the area of sanitation, for instance a plastic floor or a tile floor. Because the thin-bed flange is spaced apart from the upper edge of the drainage channel it is possible to apply a contact layer to this thin-bed flange and thus to dispose the surface covering so that its surface is flush with the drainage channel. Preferably this contact layer is elastic, so as to prevent the surface covering from becoming detached from the thin-bed flange.

To ensure an especially firm connection between surface covering and thin-bed flange, at least the upper surface of the flange is preferably sanded or coated with a similar bonding agent. With this embodiment a permanent connection between drainage channel and surface covering is ensured. In addition to mediating the permanent joining of the surface covering to the drainage channel, however, this thin-bed flange also serves to stabilise the drainage channel underground, so that even when loads are imposed by movements above it, the drainage channel stays reliably positioned in its seating.

Preferably the drainage channel comprises at least one element for altering its height and/or inclination, so that it can be adjusted to a desired height level and/or a desired degree of inclination with respect to the floor. This element enables the drainage channel to be adjusted to its future installation site in a targeted manner, which is particularly necessary in the context of sanitation because here a targeted and effective conduction of water from the surface covering into the drainage channel is demanded.

Preferably the height-altering element and/or inclination-altering element comprises a standing flange that projects out of the drainage channel in a direction substantially perpendicular to the bottom wall and, attached thereto by at least one connecting element so that it can be shifted or pivoted, a mounting element for mounting on the floor. This projecting standing flange can be disposed both on the bottom wall of the drainage channel and also on the thin-bed flange or the side walls, and is preferably welded to the drainage channel. However, any other jointing technique known from the state of the art can also be employed. For example, it is conceivable for the standing flange to be integral with the drainage channel, in that a particular region of the thin-bed flange is bent downward and then functions as standing flange. The mounting element to receive the standing flange preferably comprises a longitudinal slot within which the standing flange together with the drainage channel can be seated and shifted longitudinally by way of a connecting element, for instance a screw. However, it is of course also conceivable for corresponding catch connections to be constructed between mounting element and standing flange, in order to ensure that the height and/ or inclination can be adjusted. The mounting element in turn is preferably screwed or attached by adhesive to the floor itself, in order to ensure a reliable positioning of the drainage channel even before the installation of the surface covering.

In order to ensure faultless functioning of the drainage channel, the odour trap to be inserted into the outflow pot of the drainage channel preferably has a sealing-water height between 30 mm and 80 mm, in particular substantially 50 mm. The outflow pot of the drainage channel has the component dimensions necessary for it to correspond thereto. A sealing-water height in the above-mentioned range has proved to be especially effective when the drainage channel is in use, in particular in the sanitation context, and guarantees both an effective water conduction and also a reliable odour trap, even if the drainage channel is not in use for a relatively long time.

Preferably the odour trap comprises an odour-trap pot to accommodate a sealing water and an odour-trap inlet element that can be tightly but releasably attached, by way of an upper edge, to the outflow pot of the drainage channel and, by way of a lower edge, can be introduced through an upper side of the odour-trap pot so as to form a labyrinth odour trap. In this way a very compact odour trap is obtained, which is both easily insertable into the outflow pot of the drainage channel and also guarantees reliable function. By combining the outflow pot disposed on the drainage channel, in particular a deep-drawn outflow pot, with a removable odour trap of the kind described above, one obtains a very compact drainage channel with a very small installation height, so that it can be installed even where only limited space is available.

Preferably at least one retaining lug is disposed on the odour-trap pot and at least one connecting element with a retaining groove on the odour-trap inlet element, or conversely, so that when the odour-trap inlet element is being inserted into the odour- trap pot, the retaining groove can be brought into releasable locking engagement with the retaining lug. In this way an odour trap is obtained that can be simply disassembled and reassembled, without using any additional tool, so as to carry out the appropriate cleaning operations at specified intervals and whenever it seems necessary. The retaining lug here is, for example, a rounded ridge that can be snapped into a correspondingly shaped retaining groove in the form of a ridge receptacle on the connecting element. The force threshold that must be crossed in order to release this engagement is preferably made such that the odour trap can be removed from the outflow pot of the drainage channel without releasing the engagement between odour-trap pot and odour-trap inlet element. Hence the odour trap can be removed as a whole from the drainage channel and then, if necessary, taken apart for cleaning.

It is of course also possible to dispose a retaining groove on the odour-trap outflow pot instead of a retaining lug, and to dispose a correspondingly congruent retaining lug on the connecting element of the inlet element. Furthermore, it is of course also possible to construct a series of retaining grooves and lugs in order to ensure a particularly stable connection. The retaining lugs and/or grooves can be made integral with the associated component or attached as a separate unit by means of appropriate attachment means such as are known in the state of the art.

Preferably the retaining lug or groove is positioned on the upper side of the odour-trap pot, such that it extends in particular over the entire circumference of the odour-trap pot. The advantage of its covering the whole circumference is that the odour-trap inlet element can be set into and engaged with the inlet pot regardless of the inlet element's orientation with respect to the circumference of the pot. As a result of the placement of the retaining lug or groove on the upper side of the odour-trap pot, retention is achieved in the vertical as well as the horizontal direction of the odour trap, and hence no additional positioning elements are needed to position the odour-trap inlet element within the odour-trap pot. If large loads will be imposed from above, or also to increase the durability of the above-mentioned system for locking the odour-trap pot and inlet element together, additional bearing elements can be provided between pot and inlet element, for instance in the form of bearing projections. Furthermore, the positioning of the retaining grooves or lugs on the upper side of the odour-trap pot makes visual inspection of the locking state a simple matter.

Preferably the odour-trap inlet element comprises at its upper edge a flange that extends substantially at a right angle thereto and serves to receive a connection gasket to seal the connection to the outflow pot of the drainage channel. The dimensions of this right-angle flange and the connection gasket disposed thereon are chosen so that they conform to the internal dimensions of the outflow pot of the drainage channel, so that the odour trap can simply be pushed into the outflow pot and then is seated in a secure and water-tight manner. The term connection gasket here includes all of the sealing elements known in the state of the art, which can be set onto the flange or held to it by appropriate connecting elements. However, it is of course also conceivable to design a connection gasket in such a way that the right-angle flange is not needed, and a direct mounting on the odour-trap inlet element can be performed.

Preferably the connecting element runs along the odour-trap inlet element from an underside of the flange to an outer wall of the odour-trap inlet element. As connecting element in this case, for example, a punched-out sheet of metal can be used, in which is formed the retaining groove or lug that is needed for locking to the odour-trap pot. In this case preferably several connecting elements are provided, which are uniformly distributed over the circumference of the odour trap. The attachment of the connecting element to the odour-trap inlet element in this case is preferably achieved by a stamped or welded connection, although it is of course also possible to employ corresponding releasable connection methods, so that when it becomes worn the connecting element can simply be exchanged. Here, for example, a groove-and-spring system is conceivable, such that the connecting element can be pushed or clicked into a corresponding receptacle on the odour-trap inlet element. In order to obtain a locking that is as comfortable and durable as possible, the connecting element is preferably made of an elastic material, in particular a flexible, thin metal sheet. This elastic construction not only enables reliable locking but also, if a releasable arrangement of the connecting element on the odour-trap inlet element is used, allows simple mounting in corresponding bearing elements on the inlet element.

As mentioned at the outset, the present invention comprises not only a drainage channel with an odour trap of the kind described above, but also the odour trap itself, for installation in a drainage channel and in particular in a shower channel. For the sake of simplicity, however, there will be no more detailed discussion here regarding the structure of the odour trap and its particular embodiments, because in its characteristics it corresponds to the odour trap that was described in the preceding paragraphs in connection with a drainage channel for sanitation purposes. In this regard reference is explicitly made to these passages.

Further embodiments of the invention will be apparent from the subordinate claims.

In the following the invention is described with reference to an exemplary embodiment, which is explained in greater detail with reference to the drawings, wherein

Fig. 1 shows a cross section through an embodiment of the drainage channel with deep-drawn outflow pot, transverse to a main direction of extent;

Fig. 2 shows a plan view of the embodiment in Fig. 1;

Fig. 3 shows a side view of the embodiment in Fig. 1 transverse to a main direction of extent;

Fig. 4 shows a cross section through an odour trap to be received in the outflow pot of the drainage channel shown in Fig. 1,

Fig. 5 shows a more detailed section through the connecting region of two individual components of the odour trap in Fig. 5; and

Fig. 6 shows a plan view of the odour trap in Fig. 4.

In the following description, the same reference numerals are used for identical parts or parts with identical actions. Figure 1 shows a cross section through a drainage channel 1 to be installed in a floor, for example a floor of a shower, so that the upper surfaces of channel and floor are flush with one another; the section is transverse to the main direction of extent of the drainage channel. The drainage channel 1 comprises a bottom wall 4, two side walls 2, 2' and a circumferential thin-bed flange 8, 8'. A crucial aspect of the invention is that the parts of the thin-bed flange 8, 8' shown in Fig. 1, the side walls 2, 2' and the bottom wall 4 are constructed by bending a single sheet of metal, so that no welding is required at the regions of transition from one element to another. The thin-bed flange 8, 8' serves to receive a floor surface covering (not shown) and in order to improve the bonding between said covering and the flange, the latter is provided with a layer 10 that promotes adhesion, for instance by sanding, which is applied to an upper side 9, 9' of the thin-bed flange 8, 8'. The drainage channel 1 is installed in such a way that the adjacent surface covering (not shown) is flush with an upper edge 12, 12'. Because the thin-bed flange 8, 8' and the side walls 2, 2' ate formed by bending a metal sheet, the upper edge 12, 12' is ideally smooth, one result of which is to prevent the deposition of dirt particles from the water that is to be conducted away from the surface. Furthermore, which is especially significant in the area of sanitation, this bending process produces an upper edge 12, 12' round enough that it presents no danger of injury even to people walking barefoot. In order to enable the surfaces of drainage channel 1 and surface covering (not shown) to be flush with one another, the thin-bed flange 8, 8' is spaced apart from the upper edge 12, 12' by an appropriate distance.

Integrally attached to the bottom wall 4 is an outflow pot 6, which allows the water that flows from the surface into the drainage channel to be conducted away, and in addition serves as a receptacle for an odour trap 20 (see Figs. 4-6). This outflow pot in this case is deep-drawn and welded to the drainage channel 1.

Figure 2 shows a plan view of the drainage channel 1 in which the circumferential thin- bed flange 8, 8', completely enclosing the drainage channel 1, is clearly visible. In this embodiment the two transverse ends of the drainage channel 1 are closed by end-face side walls 5, 5', which are welded both to the side walls 2, 2' and to the bottom wall 4. The same applies to the thin-bed flange, which in the region of the end-face walls is likewise welded, as a component part 8", 8'", to the drainage channel 1. In the middle of the drainage channel 1 the outflow pot 6 is shown, with the odour trap 20 inserted into the outflow pot 6.

Figure 3 shows a side view of the drainage channel 1, perpendicular to the main direction of extent of the drainage channel 1. The outflow pot 6 is visible here, being attached to the bottom wall 4 and projecting downwards. On each of the two sides of the drainage channel 1 a height-altering element 16, 16' is provided, which allows the drainage channel 1 to be adjusted to a desired height level with respect to a floor 3 on which the drainage channel is seated. The height-altering elements 16, 16' each comprise a standing flange 13, 13', which likewise projects out of the bottom wall 4 of the drainage channel 1 and in each case is joined to a mounting element 15, 15' by way of a connecting element 14, 14', for instance a screw; the mounting element has an angular shape and is seated on the floor 3. The mounting element 15, 15' preferably comprises a slot so that by loosening the connecting element 14, 14' the drainage channel 1 can be shifted over the standing flange 13, 13'. To enlarge the range in which shifting can occur it is possible in addition to provide a corresponding slot on the projection 13, 13'. Then after the connecting elements 14, 14' have been tightened, the drainage channel 1 is secured at that height level. However, it is of course also conceivable for this height-altering element 16, 16' to be used as a means of altering inclination, in which case after loosening of the connecting elements 14, 14' the drainage channel 1 can be pivoted perpendicular to the plane of the drawing.

Figure 4 shows the odour trap 20, which can be pushed into the outflow pot 6 so as to form a tight seal. The odour trap 20 comprises an odour-trap pot 22 into which, through an upper side 30, an odour-trap inlet element 24 can be inserted. In the case of this odour trap 20 water that is to be conducted out of the drainage channel 1 enters the odour-trap inlet element 24 by way of an inlet region 21 and, in the region of a lower edge 28, flows into the odour-trap pot 22, which collects a sealing water (not shown) until it is completely full, after which the sealing water flows over the upper side 30 and into the outflow pot 6, from which it is conducted away. The odour-trap pot 22 and the odour- trap inlet element 24 are matched to one another in such a way as to determine a maximal height h of the sealing water, which here preferably amounts to 50 mm. The odour-trap inlet element 24 comprises at an upper edge 26 a flange 38, which extends outward at a 90° angle to the main direction of extent of the odour-trap inlet element. On this flange 38 a connection gasket 40, 40' is provided, which extends over the entire circumference of the flange 38 and enables the odour trap 20 to be inserted into the outflow pot 5 of the drainage channel 1 in a tightly sealed manner. In this embodiment the connection gasket 40, 40' is designed with multiple lips, but it goes without saying that all other gasket designs in current use can also be employed here.

Because, as is known, an odour trap eventually accumulates a deposit of dirt particles contained in the water that is to be conducted away, it must be cleaned at certain intervals. For this purpose the present odour trap 20 is constructed in several parts, such that the odour-trap pot 22 and the odour-trap inlet element 24 can be separated from one another and thus enable the odour trap 20 to be completely cleaned.

Figure 5 shows a means to this end, allowing the odour-trap pot 22 to be unlocked from the odour-trap inlet element 24. On the upper side 30 of the odour-trap pot 22 a retaining lug 32 is provided, which is releasably engaged with a retaining groove 36 in a connecting element 34, which itself is attached to the odour-trap inlet element 24. In this embodiment the connecting element 34 is disposed on an underside 42 of the flange 38 and at a perpendicular outer wall 44 of the odour-trap inlet element 24. In this case the connecting element 34 is welded to the odour-trap inlet element. To ensure a secure locking between retaining lug 32 and the retaining groove 36, the connecting element 34 is constructed as a flexible, thin sheet of metal, which creates or releases the connection between retaining lug 32 and retaining groove 36 when a specified locking force or releasing force, respectively, has been exceeded. This arrangement makes it possible for the odour trap 20 to be completely disassembled, enabling effective cleaning. This releasing/locking-force threshold is here chosen to be below the force necessary to pull the odour trap 20 out of the outflow pot 6. As a result, it is ensured that the odour trap 20 can be removed as a whole from the outflow pot 6 of the drainage channel 1.

However, the following rearrangement is of course also conceivable, namely that instead of the retaining lug 32 a retaining groove is disposed on the odour-trap pot 22, in which case it is engaged by a correspondingly shaped retaining lug on the connecting element 34 so that they are locked together. It is also possible for the connection between the odour- trap inlet element and the connecting element 34 to be secured not by welding but rather, for example, by disposing appropriate receptacles on the odour-trap inlet element 24 so that the connecting element 34 can be clicked into them and thus, for example, is made easily exchangeable.

Figure 6, a plan view of the odour trap 20, shows how the odour-trap inlet element 24 is connected to the odour-trap outflow pot 22 by way of the connecting elements 34. For this purpose three connecting elements 34 are uniformly distributed over the circumference of the odour-trap inlet element 24 and engaged with retaining lugs 32 disposed on the upper side 30 (see Fig. 4). Here, in order to ensure simple insertion of the odour-trap inlet element 24, this retaining lug 32 extends over the entire circumference of the odour-trap pot 22.

List of reference numerals

1 Drainage channel

2, 2' Side wall

3 Floor

4 Bottom wall

5, 5' End-face side wall

6 Outflow pot

8, 8', 8", 8'" Thin-bed flange

9 Flange upper side

10 Adhesion-promoting layer

12, 12' Upper edge

13 Standing flange

14 Connecting element

15 Mounting element

16 Element for altering height or inclination

20 Odour trap

21 Inlet region

22 Odour-trap pot 24 Odour-trap inlet element

26 Upper edge

28 Lower edge

30 Upper side

32 Retaining lug

34 Connecting element

36 Retaining groove

38 Flange

40 Connection gasket

42 Flange underside

44 Outer wall h Height of sealing water

Claims

1. Drainage channel to be used for sanitation purposes, in particular shower channel, to be installed in a floor (3) so as to be substantially flush with a surface covering of the floor, with two side walls (2, 2'), at least one bottom wall (4), an in particular deep-drawn outflow pot (6) that is connected to the bottom wall (4) and serves to receive an odour trap (20), and a circumferential thin-bed flange (8, 8') by way of which a surface covering can be connected to the drainage channel (1), characterized in that the thin-bed flange (8, 8') at the side walls (2, 2'), the side walls (2, 2') themselves and the bottom wall (4) are formed by bending a single sheet of metal.

2. Drainage channel according to Claim 1, characterized in that the thin-bed flange (8, 8') is spaced apart from an upper edge (12, 12') of the drainage channel (1) in such a way that the surface covering can be placed on an upper side (9, 9') of the flange so that its upper surface is flush with the upper edge (12, 12') of the drainage channel (1).

3. Drainage channel according to Claim 1 or 2, characterized in that the thin-bed flange (8, 8') on at least its upper side (9, 9') is sanded or comprises a similar adhesion-promoting layer (10).

4. Drainage channel according to one of the claims 1-3, characterized in that the drainage channel (1) comprises at least one height- and/or inclination-altering element (16, 16') for adjustment of a desired height level and/or a desired inclination with respect to the floor (3).

5. Drainage channel according to Claim 4, characterized in that for mounting on the floor (3), the height-altering element (16, 16') comprises a standing flange (13, 13') that projects from the drainage channel (1) substantially perpendicular to the bottom wall (4) as well as a mounting element (15, 15') that is attached to said flange by way of at least one connecting element (14, 14') so as to permit linear and/or pivoting movement.

6. Drainage channel according to one of the claims 1-5, characterized in that the odour trap (20) has a sealing-water height h between 30 mm and 80 mm, in particular substantially 50 mm.

7. Drainage channel according to one of the claims 1-6, characterized in that the odour trap (20) comprises an odour-trap pot (22) to receive a sealing water and an odour-trap inlet element (24) that by way of an upper edge (26) can be releasably connected in a water-tight manner to the outflow pot (6) of the drainage channel (1), and by way of a lower edge (28) can be inserted into the odour-trap pot (22) through an upper side (30) of the odour-trap pot (22) so as to form a labyrinth odour trap.

8. Drainage channel according to Claim 7, characterized in that there are disposed at the odour-trap pot (22) at least one retaining lug (32), and at the odour-trap inlet element (24) at least one connecting element (34) with a retaining groove (36), or conversely, so that when the odour- trap inlet element (24) is inserted into the odour-trap pot (22), the retaining groove (36) can be brought into releasable locking engagement with the retaining lug (32).

9. Drainage channel according to Claim 8, characterized in that the retaining lug (32) or groove is disposed on the upper side

(30) of the odour-trap pot (22) and extends in particular over the entire circumference of the odour-trap pot (22).

10. Drainage channel according to one of the claims 7-9, characterized in that the odour-trap inlet element (24) on its upper edge (36) comprises a flange (38) oriented at a substantially right angle, which serves to receive a connection gasket (40) to produce a tightly sealed connection to the outflow pot (6) of the drainage channel (1).

11. Drainage channel according to one of the claims 7-10, characterized in that the connecting element (34) on the odour-trap inlet element (24) runs from an underside (42) of the flange (38) to an outside wall (44) of the odour- trap inlet element (24).

12. Drainage channel according to one of the claims 7-11, characterized in that the connecting element (34) consists of an elastic material, in particular an elastic thin metal sheet.

13. Odour trap for installation in a drainage channel (1), in particular shower channel, with an odour-trap pot (22) to receive a sealing water and an odour-trap inlet element (24) that by way of an upper edge (26) can make a releasable, water-tight connection to an outflow pot (6) of the drainage channel (1) and by way of a lower edge (28) can be inserted into the odour-trap pot (22) through an upper side (30) thereof, so as to form a labyrinth odour trap, characterized in that on the odour-trap pot (22) at least one retaining lug (32) and on the odour-trap inlet element (24) at least one connecting element (34) with a retaining groove is disposed, or conversely, so that when the odour-trap inlet element (24) is being inserted into the odour-trap pot (22), the retaining groove (36) can be brought into a releasable, locking engagement with the retaining lug (32).

14. Odour trap according to Claim 13, characterized in that the retaining lug (32) or groove is disposed on the upper side (30) of the odour-trap pot (22) and extends in particular over the entire circumference of the odour-trap pot (22).

15. Odour trap according to Claim 13 or 14, characterized in that the odour-trap inlet element (24) at its upper edge (26) comprises a flange (38) that is oriented at substantially a right angle and serves to receive a connection gasket (40) to provide a tightly sealed connection to the outflow pot (6) of the drainage channel (1).

16. Odour trap according to one of the claims 13-15, characterized in that the connecting element (34) on the odour-trap inlet element (24) runs from an underside (42) of the flange (38) to an outer wall (44) of the odour-trap inlet element (24).

17. Odour trap according to one of the claims 13-16, characterized in that the connecting element (34) consists of an elastic material, in particular an elastic thin metal sheet.