EP2666917B1 - WC with odour extractor - Google Patents

Description

The present invention relates to a water closet (WC) with a Geruchsabsaugeinrichtung.

Toilets with flushing water connection are in use for a long time and common. About the flushing water connection, the rinse water flows through a flushing channel and a Spülwasseraustritt through in a so-called toilet bowl to rinse them. The used rinse water then runs together with the weggespülten contents of the toilet bowl in a drain line, with a so-called siphon is usually provided as an odor trap.

It is also known per se to equip such a toilet with a Geruchsabsaugeinrichtung, which sucks air from the toilet bowl. Both suction openings above, but near the toilet bowl and in the actual toilet bowl have been used. In particular, it is already known to use the flushing channel of the flushing water for odor extraction and to connect the odor removal device to the flushing channel. It can then, as far as the flushing channel is not used for rinsing, through the Spülwasseraustritt and the suction, namely the connection of the odor removal on the flushing duct, suck in air and thus disturbing odors from the toilet bowl. For example, the intake air may be fed to a filter, such as an activated charcoal filter, and then returned to the room. It can also be led to the outside or fed into an exhaust air system.

The EP 1 369 537 A1 shows a toilet with a Geruchsabsaugeinrichtung which is connected via a tee or a Y-piece to a flushing channel in the wall behind the toilet, the variant with the Y-piece is used to prevent the ingress of rinse water.

The DE 1 658 276 B also shows a WC with an odor extraction device, which is connected in the region of a curvature of the flushing channel on the inside of the bend, and to prevent the entry of rinsing water proposes a trained as a water trap pump venting space. From this document, the preamble of claim 1.

The DE 43 13 406 A1 shows a toilet with Geruchsabsaugeinrichtung, in which downstream of a bend and of a taper, a connection opening for the odor removal device is provided, which is closed in existing Spülwasserströmung by a floating valve flap, which valve flap otherwise closes the flushing channel.

The invention is based on the technical object of specifying a toilet according to the preamble of claim 1, which is connected in a simple and against rinsing water entry particularly effectively protected manner to the flushing channel while allowing a favorable Spülkanalverlauf.

The problem is solved by claim 1. The suction port is located at a location of the purge passage that exhibits reduced or vanishing static pressure due to dynamic flow effects of an ideal fluid. This does not imply an ideal, so frictionless, flow behavior of the water but merely means that the invention of friction losses in the water flow leads independently to a pressure reduction at the junction of Absauganschlusses and thus does not force actually undesirable large friction losses due to the Spülkanalform.

For this purpose, on the one hand the deflection of the flow is provided by a curvature and arrangement of the suction on the inside of the bend. Due to the centrifugal force of the water, the static pressure on the inside of the bend, the suction side, is reduced and increased on the outside of the bend, the pressure side. In addition, the invention provides for a constriction of the flow cross-section to accelerate the flow and, according to the approximate Bemoulli equation, corresponding reduction in static pressure. The aim is to make the suction connection so that the back pressure of the water in the suction connection little or no appearance.

In this case, the suction connection is preferably arranged at the "innermost" position of the (circumference of) the flushing channel. This is not mandatory. The suction connection does not have to be at or symmetrical to the innermost position but may also be asymmetrical. Preferably, the cross-section of the suction connection is on the inside insofar as it is possible to define lines of the flushing channel wall lying on the circumference of the flushing channel as the boundary between the outside and the inside in the (local) plane of curvature. In any case, should be the largest part of the cross section of the suction in this sense on the inside.

Incidentally, the term constriction in the most general sense is to be understood locally and not to the entire irrigation channel. Preferably, however, at least 10 cm downstream of the suction connection and preferably up to the rinse water outlet, only larger flow cross-sections are present than in this constriction. Conversely, the same applies preferably instead or also upstream, preferably up to the flushing water connection. In this case, the flushing water connection refers to the toilet body and not further Spülwasserzuleitungsteile, such as in an installation wall.

"Parallel-connected openings, for example downwardly directed openings along an annular flushing channel of a classic WC, should be evaluated with regard to their flow cross-section sum.

The restriction should be in a quantitative ratio of the cross sections of 1: 1.1 to 1: 2 relative to a reference position at the rinse water port upstream thereof, the lower limits being 1: 1.2; 1 in the following order; 1: 1.3 and 1: 1.4 and the upper limits 1: 1.9; 1: 1; 8; 1: 1.7 and finally 1: 1.6 are increasingly preferred. Further, the minimum flow area of the suction port is preferably equal to or smaller than that of the throat (in the flushing channel itself), preferably in a numerical ratio between 1: 1 and 1: 3, with the following lower limits 1,2; 1.4; 1.6; 1.8 and the following upper limits 2.8; 2.6; 2.4; 2.2 are more preferred for the second number in this order. The embodiment illustrates these ratios with a cross-sectional ratio of 1: 2.

Furthermore, the purge channel curvature in the region of the suction connection can also be within certain quantitative limits, namely averaged over an angular range of 40 ° between the simple and ten times typical inner radius (root out (cross-sectional area divided by π)) of the purge channel there. Two and three times lower limits and eight times, six times and four and a half times upper limits are further preferred.

Another embodiment of the invention relates to a water separator. This is a vessel or at least a factor 2 comprehensive cross-sectional widening on the suction side of the suction port (and relative to its narrowest point), ie outside the scavenger, but preferably in its vicinity. The odor removal device may be connected to this water separator, preferably in its upper region. Thus, despite the measures according to the invention, water which has entered through the suction connection can still be trapped in the lower region or on the bottom of the water separator and does not enter the connection of the odor removal device or only in negligible quantities. The water separator thus works by the gravity of the water. The water separated therein can be collected and otherwise removed. In a preferred embodiment, it is returned by an inclination of the Wasserabscheiderbodens to the flushing channel.

Incidentally, the odor removal device is preferably not only connected in the upper region of the water separator but there in a region opposite to the flushing water flow. This means that flushing water residues entering with the flushing water flow have flowed in with a certain flow direction in the flushing channel and from there into the water separator and thus preferably strike a corresponding side of the water separator. The preferred position for the connection of the odor removal device is opposite, as the embodiment illustrates.

The water separator can also be used in combination with a shower toilet, so a shower device of the toilet, to connect a water overflow of a water tank of the shower device to the water separator, namely preferably in an upper area thereof. The shower must not necessarily be integrated in the toilet; It may also be an attachment or otherwise retrofitted or structurally separate part.

The measures according to the invention can restrict and prevent the ingress of rinse water into the odor removal device, namely because only a little or no water passes through the suction connection due to the flow effects described. This is an elegant and simple solution. It also avoids the problems associated with conventional valves or flaps for preventing the entry of rinse water into an odor removal device in terms of technical complexity, volume, cost, maintenance and maintenance intensity etc. Preferably, the invention is therefore used in the supply line of the odor removal from including the Absauganschluss no such flaps and valves provide and indemnify this supply line.

Furthermore, it has already been explained that the utilization of flow effects of an ideal liquid, which thus does not depend on the internal friction, allows the possibility of a fluidically or pressure-technically skillful arrangement of the suction connection with a simultaneously low total flow resistance of the flushing channel. This is of particular importance in connection with gravimetric flows, ie those which operate due to the gravity of the rinse water and without a WC-internal Spülwasserzufuhrpumpe. The classic example is a toilet with a cistern located higher than the toilet bowl. In this context, a fluidically favorable design of the flushing channel is especially advantageous if you want to work with reduced for ecological and economic reasons Spülwassermengen. This may preferably be a concealed cistern and in particular a mounted in a wall-mounted mounting frame concealed cistern.

If an effective flow of the flushing water through the flushing channel can be ensured in the manner described, this not only improves the flushing effect of comparatively small amounts of flushing water in the flushing bowl but also increases the kinetic energy of the flushing water as it passes through the drainage, in particular by a siphon. In that regard, the invention is also advantageous in toilets with a static siphon. This is understood to mean a siphon that functions without additional mechanical actuation, such as a flap or the like. The invention is also advantageous in WCs, which dispense with a separate outlet nozzle of the rinse water just above the Sifon to reduce the Spülwasserverbrauchs. Such outlet nozzles are known per se and serve to accelerate the rinse water in the siphon area. In connection with a relatively fast flushing water flow can be advantageously dispensed with.

Finally, the kinetic energy of the rinse water can also be exploited and even increased by the fact that the rinse water enters the toilet bowl as trouble-free as possible and flows there with a predominant tangential velocity component in order to rotate through the bowl to the siphon.

Figur 1

zeigt eine Draufsicht auf ein erfindungsgemäßes WC.

Figur 2

entspricht weitgehend Figur 1, zeigt aber eine teils geschnittene Draufsicht mit einer geringfügig unter der Oberkante des WC liegenden horizontalen Schnittebene.

Figuren 3a, 3b und 3c

zeigen eine perspektivische Ansicht, eine Draufsicht und einen Schnitt entlang einer mit C-C bezeichneten Ebene zu einem Spülkanalstück aus Figur 2.

Figur 4

zeigt eine perspektivische rückseitige Ansicht eines Teils des WCs aus den Figuren 1 und 2.

In the following, the invention will be explained in more detail with reference to an embodiment, wherein the individual features may be essential to the invention in other combinations.

FIG. 1

shows a plan view of a toilet according to the invention.

FIG. 2

corresponds largely FIG. 1 but shows a partially sectioned plan view with a slightly below the upper edge of the WC horizontal horizontal sectional plane.

Figures 3a, 3b and 3c

show a perspective view, a plan view and a section along a designated CC plane to a Spülkanalstück FIG. 2 ,

FIG. 4

shows a perspective rear view of a part of the toilet from the Figures 1 and 2 ,

FIG. 1 shows a plan view of a toilet according to the invention. 1 is a central toilet bowl and 2 a toilet seat ring (or a so-called toilet glasses). 3 designates a flushing water drainage of conventional type, which is connected via a siphon to the water level inside the toilet bowl 1, and 4 denotes a flushing water connection. So far the toilet is off FIG. 1 (With the exception of the later explained design of Spülwasseraustritts in the bowl 1) conventional.

From the flushing water connection 4, a curved pipe section 5 leads to the upper right side of the bowl 1 in FIG. 1. FIG. 2 shows a sectional view through a slightly lower level and in particular the pipe section 5, namely the so-called Spülkanalstück here, something completely. It opens into a Spülwasserdüse 6, which as Spülwasseraustritt at the in Figures 1 and 2 right side of the sink 1 functions. This nozzle 6 introduces the rinse water with tangential velocity direction in the upper area of the toilet bowl 1, so that a rotating, and in particular compared to a classic flushing rim with a plurality of small outlet openings, fast flushing water flow in the toilet bowl 1 results. The rinsing nozzle 6 as Spülwasseraustritt and the channel piece 5 together form the flushing channel.

FIG. 2 also shows in the rear - area of the toilet bowl 1 two molded into their ceramic structure passages for a shower arm (centric) and left next to a hair dryer. It is therefore a shower toilet.

The Spülkanalstück 5 is in the Figures 3a, 3b and 3c shown in more detail, wherein the dashed line CC in FIG. 3b the sectional plane of the sectional view in Figure 3c shows. It can be seen that the Spülkanalstück 5 narrows from an initially subsequent to the Spülwasseranschluss 4 larger circular cross-section at a level 7 to a (area related) by a factor of 1.5 reduced circular cross-section. This cross-section is maintained downstream of the step 7 in the relatively highly curved piece downstream. This piece is referred to here as narrowing 8. The flow cross-section in the region upstream of the step 7 is about 15 cm ² and downstream within the constriction 8 about 10 cm ² (the distance in the flow direction between the sectional plane CC in FIG. 3b and the portion of the flushing passage piece 5 corresponding to the step 7 is about 4 cm). Upstream, the flow cross section no longer changes significantly up to the rinse water connection 4, downstream after the curvature and constriction 8 it opens again in terms of area, essentially by increasing its height. You can do that in a bit FIG. 3a and also in the below still described FIG. 4 detect. Incidentally, the course of the Spülkanalstücks 5 downstream is straighter again and the cross-sectional shape adapts to the upright form of the flushing nozzle 6, as FIG. 3a in comparison with FIG. 2 shows.

In the constriction 8, two fluid dynamic effects appear to occur simultaneously, namely the generation of a static negative pressure on the inside of the bend as a result of the centrifugal forces and on the other a Venturi effect due to the step 7 by increasing the flow velocity within the constriction 8. Keep both effects in common the odor removal device without further measures such as valves or flaps anhydrous.

In the area of the constriction 8, a suction connection 9 is provided on the inside of the bend, the smallest cross-section of which is about 5 cm ² approximately half of the flow cross-section of the flushing channel in the constriction 8 (here only the circular portion is counted and not the proportion of the terminal 9) and about one third of the cross section upstream thereof.

At the corresponding narrowed passage of this suction connection 9, a cup-like water separator 10 connects. Figure 3c shows in section CC the flushing channel 5 within the constriction 8 and the transition through the suction port 9 to the water separator 10. It can be seen a substantially enlarged cross-section of the water separator 10 compared to the suction port upstream thereof and a slightly sloping to the flushing channel 5 towards bottom of the Wasserabscheiders 10. Thus, the water, even if it should get into the water, ultimately back again.

Furthermore, one recognizes especially in the FIGS. 3a and 3b A first is denoted by 11 and is provided at a side opposite to the water flow direction there in the upper region of the water separator 10. He is also in Figure 3c to recognize. Here, the actual suction device 13 is connected, in the Figures 1 and 2 is shown symbolically and on the basis of FIG. 4 will be discussed in more detail. (The Figures 1 and 2 Specifically show a suction channel 12 which is connected to the nozzle 11 and leads to a symbolically shown fan 13 out, having an odor filter, not shown.)

The second connection piece is designated 16 and is also based on FIG. 4 explained in more detail.

The water separator 10 ensures, in particular, that no water is sucked in despite the operation of the odor extraction device towards the end of the flushing process with decreasing water velocity in the flushing channel piece 5 and thus reduced centrifugal forces in the curvature described. Namely, if the static negative pressure generated by the speed can no longer compensate for the fan vacuum, a drop of water passes through the suction port 9. In the water separator, however, the air is significantly slowed down because of the cross-sectional widening, so that the water remains in the lower part of the water separator 10.

FIG. 4 shows a perspective view of one in the Figures 1 and 2 partially not shown part of the toilet according to this embodiment. The viewing direction is obliquely forward from behind. The relation to the Figures 1 and 2 The easiest way to illustrate the course of the Spülkanalstücks 5 with the level 7 and the constriction 8 and the flushing water connection 4 in FIG. 4 right. Approximately over the middle of the Spülkanalstücks 5 appears in FIG. 4 the water separator 10, from which points forward to the right (in FIG. 4 ) of the connection piece 11 for the odor removal device and the corresponding suction channel 12 can be seen. The channel 12 leads front left to a filter box 13, which has a fan for suction. The in FIG. 4 small right-angled small square spigot carries the filter, while the larger rectangular opening upwards is for revision. It can be seen, moreover, that the actual geometric arrangement of the line 12 and the filter box 13 is slightly different from the Figures 1 and 2 deviates and in FIG. 4 the toilet bowl 1 is missing.

From the water 10 goes to the rear left over the connecting piece 16, a further channel line 17 down and is connected as a functional overflow to a water tank 14 of a shower device. The water tank 14 has approximately a horseshoe shape, to accommodate the upwardly facing knee of the siphon of the toilet. The water tank 14 contains the shower water for the in FIG. 4 shower arm 15 shown on the top right, which in operation by the in FIG. 2 drawn breakthrough in the toilet bowl 1 can be extended and retracted. The water tank 14 includes a heater and thus forms a hot water boiler for the shower water. The right drawn in front of the shower arm 15 structure is the same for extending and retracting the electric motor.

If, for example, due to a defect, the water tank 14 overfills, then the water through the channel 17 and the water separator 10 ultimately drains away via the flushing channel into the toilet bowl 1 and thus safely through the drainage thereof. The odor removal device remains unaffected because the channel 12 reaches a sufficient height. Incidentally, there is no risk of accidental suction of false air through the channel 17, because the water tank 14 is filled in the operating state with water.

Claims (14)

1. WC having
   a flushing water connection (4),
   a flushing water outlet (6) into a WC bowl (1),
   a flushing channel (5) which connects said flushing water connection (4) and said flushing water outlet (6) and comprises a bend, and
   an odour extraction unit (12, 13) which is connected to said flushing channel (5) via a suck-off connection (9) to suck-in air from said WC-bowl (1) through said flushing water outlet (6) and said suck-off connection (9), wherein said suck-off connection (9) is arranged in a bend of said flushing channel (5) on the inside of said bend,
   characterized in that said suck-off connection (9) is arranged, in combination with said arrangement in said bend, in a narrowing (8) of said flushing channel (5).
2. WC according to claim 1, wherein the cross section of flow of said flushing channel (5) is, for at least 10 cm downstream of said suck-off connection (9) and preferably up to said flushing water outlet (6), constantly larger than in said narrowing (8) and/or wherein the cross section of flow of said flushing channel (5) is, for at least 10 cm upstream of said suck-off connection (9) and preferably up to said flushing water connection (4), constantly larger than in said narrowing (8).
3. WC according to claim 1 or 2, wherein said narrowing (8) has, relatively to a cross section of said flushing water connection (4), a ratio of between 1:1,1 and 1:2.
4. WC according to one of the preceding claims, wherein said suck-off connection (9) has a minimal cross section which has a ratio of between 1:1 and 1:3 to said narrowing (8).
5. WC according to one of the preceding claims, wherein said bend of said flushing channel (5) has, in the region of said suck-off connection (9) over an annular range of 40°, a mean radius of curvature between a one-fold and a ten-fold of the typical inner radius of the flushing channel (5) there.
6. WC according to one of the preceding claims, wherein a water separator (1) is provided subsequent to said suck-off connection (9) on the suck-off side thereof, which water separator (10) has a cross section being at least twice as large as that of said suck-off connection (9), wherein the odour extraction unit (12, 13) is connected in an upper region (11) of said water separator (10).
7. WC according to claim 6, wherein the bottom of said water separator (10) slopes towards said flushing channel (5).
8. WC according to claim 6 or 7, wherein said odour extraction unit (12, 13) is connected in an upper region (11) of said water separator (10), namely in an upper region (11) being opposite to the flushing water flow.
9. WC according to claim 6, 7 or 8, wherein said WC has a shower unit (15) and wherein a water overflow of a shower water tank (14) of said shower unit (15) is connected in an upper region (16) of said water separator (10).
10. WC according to one of the preceding claims, wherein a line (10, 11, 12) for sucking off air is free of flaps and valves between said suck-off connection (9) and said odour extraction unit (12, 13).
11. WC according to one of the preceding claims having a purely gravimetric flushing, namely without a flushing water supply pump internally said WC.
12. WC according to one of the preceding claims having a static siphon.
13. WC according to one of the preceding claims wherein said flushing water outlet (6) ends in said WC bowl (1) in such a way that the flushing water flows into said bowl (1) with a preponderant tangential velocity component with respect to the inner shape of the bowl (1) and performs a rotational movement in the bowl (1).
14. A WC-installation having a WC according to one of the preceding claims and a cistern, preferably a concealed cistern, which is in particular mounted in a mounting frame inside the wall.

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