BE1017370A5 - WC BASIN. - Google Patents

Abstract

Toilet or urinal bowl comprising a first conduit for supplying water to the bowl and a second discharge pipe, said bowl being associated with a tank with an opening closable by a valve for the supply of water. air in the tank (Figure 1)

Description

Toilet bowl

The present invention relates to a toilet or urinal bowl comprising or being associated with a first conduit for delivering water into the bowl and a second liquid and / or solid waste disposal line, said bowl being associated by the first pipe with a tank.

Document DE19950467 discloses a toilet bowl associated with a water reservoir by a pipe. Said pipe is connected by a pipe to a gas suction and evacuation pipe. The said pipe has a means for drawing air from the room, as well as odors or gases from the bowl.

The system described in this document does not relieve odors in the exhaust pipe, nor does it provide ventilation of this exhaust pipe.

Document EP1478810 discloses a toilet bowl associated with a water reservoir via a pipe. A suction system is provided to suck odors or gas from the bowl via the overflow system of the tank. The suction system is adapted to suck up a quantity of air from the room, and to repress air, odors and gases in the evacuation pipe.

This system is suitable for flush toilets. For toilets whose tank is intended to be recessed, the described system is not adequate or difficult to mount.

When the flush is activated to allow the water of the tank to flow into the bowl, the depression formed in the tank by the suction of air via the fan slows the water passage from the tank into the bowl.

Similarly for built-in toilet tanks, the tanks are very tight and allow only the passage of a small amount of air during the action of hunting. This small passage of outside air towards the tank disturbs the water passage from the tank to the bowl, in particular at the siphon of the bowl.

This problem of reducing water flow during the flushing action is even more important when the tank is associated with an odor suction device via the tank overflow.

The present invention aims to overcome this drawback and relates to a toilet bowl or urinal comprising or being associated with a water tank, a first conduit for bringing water from the tank into the bowl, to a second liquid and / or solid waste disposal line, and a device for controlling an opening or a passage between an open position to bring water from the tank into the bowl via the first line and a closed position opposing the passage of water to the bowl, said tank having an overflow leading water possibly present above the level of the overflow to the bowl, preferably via the first pipe, said bowl being characterized in that the reservoir is associated with an air supply system in the reservoir at a level above the level of the overflow, said system comprising a valve, said valve being movable between a e open position at least during part of the period during which said opening or passage is in the open position, and a closed position at least when said opening or passage is in the closed position.

According to an advantageous detail, the bowl comprises a means bringing the valve in the open position substantially as soon as the opening or passage is in the open position and / or a means bringing the valve in the closed position at least as soon as the opening or passage is in position. closed position.

According to one feature, the valve is adapted to close a passage or an opening extending in a plane forming an angle of between 5 ° and 85 °, advantageously between 10 ° and 60 °, preferably between 12 ° and 45 ° relative to to a vertical plane. Advantageously, the valve has a pivot axis or rotation located at a level greater than the opening or passage.

According to one embodiment, the reservoir, when the valve is in the closed position and when the opening or passage is in the closed position, has substantially only the overflow as a passage for air between the bowl and the reservoir, via at least partially the first conduct. Preferably, the reservoir with the valve in the closed position and the opening or passage in the closed position has a seal such that, when a fan sucks a volume of 100 liters per minute per 10 liters of reservoir volume, at least 95% preferably at least 99% of the air entering the tank is air entering the overflow.

According to an advantageous detail, the valve or its control means is adapted - to bring the valve to the open position in the event of a vacuum greater than 50 Pa (in particular more than 90 Pa, preferably greater than 120 Pa) or in case of variation negative pressure of at least 50 Pa (in particular more than 90 Pa, preferably more than 120 Pa) relative to the atmospheric pressure, and / or - to maintain the valve in the open position in case of depression greater than 50 Pa (in particular more than 90 Pa, preferably more than 120 Pa) or in the case of a negative pressure variation of at least 50 Pa (in particular more than 90 Pa, preferably more than 120 Pa) relative to the atmospheric pressure. and / or - to bring and maintain the valve in the closed position in the event of a vacuum of less than 50 Pa (in particular of more than 90 Pa, preferably of more than 120 Pa) or in the case of a negative pressure variation of less than 50 Pa ( especially more than 9 0Pa, preferably greater than 120Pa) relative to the atmospheric pressure.

According to a feature of one embodiment, the valve is a flexible membrane or a flexible element, said membrane or element being associated with a part or ballast having a weight of at least 20 grams, preferably at least 25 grams, preferably between 30 grams and 200 grams. This weight of the valve is advantageously chosen to return the membrane by gravity in the closed position and to allow the opening of the valve only when a sufficient vacuum is created in the tank by the water flow from the tank to the bowl by the action of the hunt.

According to another embodiment, the bowl comprises a mechanical means acting on the valve to bring it into the open position when controlling the opening or passage in its open position. Preferably, the mechanical means comprises an electromagnet which, when activated, keeps the valve in its open position.

According to another feature, the bowl comprises or is associated with a device for controlling the amount of water passing from the tank to the bowl. The amount of water to be used is for example determined by an odor sensor. The mechanism used is for example an electromagnet which once activated keeps the passage or opening in the open position to allow the passage of water from the tank to the bowl. According to a signal from an odor sensor, a control means determines a time during which the electromagnet must be activated to ensure the passage of a volume of water necessary for the evacuation of urine or of poop.

According to one feature, the toilet bowl is associated with a water tank, a first pipe intended to bring water from the tank into the bowl, to a second line for discharging liquid and / or solid waste, and to a device for controlling an opening or a passage between an open position to bring water from the tank into the bowl via the first line and a closed position opposing the passage of water to the bowl, said tank with an overflow leading water possibly present above the level of the overflow to the bowl, preferably via the first pipe, said control device controlling the amount of water passing from the tank to the bowl. Said bowl is characterized in that the control device of the opening or the passage comprises an electromagnet bringing and now in open position the opening or passage, and a control device controlling the activation of the electromagnet, and its deactivation. This control device comprises, for example, a timer or a timer controlling the time during which the electromagnet is kept energized to keep the open or the passage open after activation of the electromagnet. The control device comprises a receiver of a manual, automatic or semi-automatic signal adapted to generate the activation of the electromagnet and the open position of the opening or passage. For example, as soon as the user is no longer detected near the bowl or in the room or when the user no longer bears on the bowl or a plate of the bowl, a sensor sends a signal to the device control to control the activation of the electromagnet. Advantageously, the control device is adapted to determine a duration of activation of the timer or timer or timer. For this purpose, the control device comprises a means adapted to receive at least one signal of an odor sensor and / or of support time on the board and / or the presence of droppings and / or the presence of paper and / or the use of paper, and means adapted to determine depending on one or more signals a duration of activation of the timer or the timer or the timer.

According to a feature of a bowl according to the invention, the bowl comprises or is associated with an air suction device and / or smell of the bowl, preferably via the overflow of the tank.

Advantageously, the suction device comprises: a housing containing a fan, said housing having a first gas or odor suction opening coming from at least the bowl and a second gas or odor discharge opening sucked by the fan, said housing being located at a level above the bowl, and - a conduit for bringing the gases or odors sucked by the fan into the exhaust pipe, and - a pipe connecting the first pipe to the housing to ensure suction of gas or odors from the bowl.

According to one feature, the device comprises or is associated with a means ensuring through the fan an air intake of the room where the bowl is located without passing through the bowl.

According to a preferred embodiment, the device is associated with a valve located upstream or downstream of the suction device or the fan, said valve being in the open position in the event of correct operation of the fan. This avoids a return of odors. The valve or the valves are in the open position when the fan or suction device sucks up a sufficient quantity of air and / or odors. In an alternative embodiment, an anti-return valve is mounted upstream of the fan or suction device and an anti-return valve is mounted downstream of the fan or suction device.

According to a feature of one embodiment, the bowl is a toilet bowl associated with or comprising an air suction or odor device of the bowl, preferably a bowl for which the air and / or the odors sucked by the suction device are discharged into an evacuation pipe, and a device for controlling the state of an evacuation pipe, in particular its clogged or partially plugged state, preferably of a toilet bowl , said control device comprising an air suction device and / or odor and / or gas adapted for the discharge or discharge in the discharge pipe, said bowl or said control device comprising or being associated with at least one indicator light for correct operation or malfunction of the suction device and / or the delivery of air and / or odors and / or gas and / or clogging of the exhaust pipe.

Advantageously, the device comprises an electric fan and a control means measuring an electrical consumption by said fan, said control means emitting a good functioning signal when the measured power consumption is greater than a predetermined value and / or a fault signal when the measured power consumption is less than a predetermined value.

The invention also relates to a tank as described for the bowl according to the invention.

A final object of the invention is the use of a cuvette according to the invention.

Features and details of the invention will become apparent from the following detailed description in which reference is made to the accompanying drawings. In these drawings, - Figure 1 is a schematic view of a bowl according to the invention, - Figures 2 to 5 are views similar to that of Figure 1, but simplified embodiments, and Figure 6 is a schematic view of yet another embodiment.

Figure 1 schematically a toilet bowl 1 associated with a reservoir 2 adapted to contain a volume of water sufficient to evacuate Turine and / or droppings present in the bowl 1 via the conduit or channel 3 forming an elbow or siphon Ibis in the bottom of the bowl.

The water of the tank is brought to the bowl by the pipe 4.

The tank 2 is a tank embedded in the wall 5 which comprises a mechanism 6 which is movable between a raised position (creating a passage between the bottom of the tank and a part of the mechanism, for example a seal) allowing the passage of water from the tank 2 to the bowl through the channel 4 (open position), and a lowered position for which the mechanism prevents the passage of water from the tank 1 to the bowl through an opening created between the mechanism and the bottom of the reservoir 2. The mechanism 6 has the shape of a hollow tube 7 provided at its lower part with a skirt 8 comprising a seal. An electromagnet 9 (such as a coil surrounding the tube 7 having a metal coating) acts on the tube 7 to lift it when the electromagnet is actuated by a control device 10 (controlling the current supply to the coil). The control device 10 receives a control signal from the control plate 11 which makes it possible to send a "large flush" signal for the passage of a large volume of water from the tank into the bowl (for example a volume from 6 to 12 liters) adapted to carry dung and / or paper, and sending a signal "small hunt" for the passage of a small volume of water (for example less than 6 liters, especially less than 4 liters) adapted to carry the urine present in the bowl. The control device additionally receives a signal from an odor sensor 12 located in the vicinity of the bowl 1. Depending on the detected odor or its intensity, the sensor will emit a signal corresponding to the large flush and / or small hunting. The control device comprises a timer controlling the time during which the electromagnet will maintain in the raised position the tube 7. The control device will control the passage of current to the electromagnet 9 after receiving a signal from the control plate 11. current will be maintained in the electromagnet 9 for a time defined by the timer. The control device includes means for determining the time of the timer based on the odor sensor signal 12 and the signal from the control plate 11. When the odor sensor determines an odor of an intensity greater than a predetermined value, the means determines a holding time for the timer corresponding to the large flush, even if a small flush signal is sent by the control plate 11 to the control device. In one possible form, when the control plate sends a large flush signal, the timer hold time will be equal to the time required for a large flush, even if the odor sensor does not determine a flush odor. greater than a specified value.

According to another embodiment, the timer or timer is set by default with a time corresponding to the large hunting. When the odor sensor determines the absence of intensity odor above a predetermined value and when the control plate sends a small flush signal, the control device changes the time of the timer in a time corresponding to the time small hunting.

The tube 7 has a lateral opening 13 serving as an overflow tank. As soon as the water level (for example because of a poor closure of the water supply in the tank when the latter comprises the maximum volume of water) exceeds the level of overflow NI, the water the tank located above the overflow level passes through the opening 13 to flow via the tube 7 and the pipe 4 to the bowl 1.

When the electromagnet is activated, the tube 7 is raised to allow the rapid passage of water from the tank 2 in the pipe 4 and then into the bowl 1. This rapid passage of water creates a vacuum in the tank.

To avoid or reduce the brake created by this depression, and thus ensure an optimal flow of water from the tank to the bowl 1 and / or a speed of water in the pipe as constant as possible or less variable to the phenomena of depression, the reservoir comprises an air supply 14 which has an opening 15 situated above the overflow level NI, and a valve 16 movable between a closed position in which the valve 16 closes the opening 15 and an open position in which the valve is spaced from the opening to allow the passage of air in the tank 2 via the pipe 14.

The opening 15 extends in a plane P forming an angle α of about 15 ° to 30 ° with respect to a vertical plane. The valve 16 is pivotally mounted relative to a substantially horizontal axis placed above the opening 15. The valve 16 is a membrane 17 attached to a substantially circular support 18 stiffening the central portion of the valve, preventing the valve from passing through the pipe 14 and serving as a return means. Indeed, the support 18 has a sufficient weight to ensure a return valve in the closed position as soon as the depression in the reservoir is less than a given depression. In broken lines, the open position of the valve 16 is shown schematically. The pivoting movement of the valve 16 is represented by the arrow X. The valve with its support has for example a weight of the order of 50 to 100 grams to ensure a good return in the closed position, to prevent movement of the valve in position open as long as the depression is not greater than a minimum depression (thereby preventing an accidental or unwanted opening of the valve), and to ensure good closure of the opening by the valve in the event of depression below a value minimal.

In the embodiment shown, the reservoir is associated with a gas, odor and air suction device. This suction device 20 which can be mounted in the tank or out of the tank is located above the level of the overflow and draws air from the tank via the opening 21 to discharge it via the pipe 22 in the conduit 3. By the suction of air from the tank, air and odors of the bowl are sucked via the pipe 4 and the tube 7. The opening 21 is advantageously inclined and associated with a movable valve 2Ibis between an open position when the fan or the turbine 20 sucks a volume of air, gas or tank odors sufficient, and a closed position during an improper operation of the fan or the turbine. This valve 2Ibis makes it possible to avoid the return of odor of the pipe 3 via the pipe 22. Valves could also have been mounted at the outlet of the fan housing 20 or on the pipe 22, for example in the vicinity of the pipe 3 .

The valve 16 is adapted (for example with a sufficient weight) to prevent the opening of the valve 16 by the depression created by the fan and thus ensure optimal suction of air and odors via the bowl.

When activation of the flush, the valve 16 will be brought to the open position, so that the operation of the fan will not be disturbed, the air does not pass through the tube 7 from the opening 15. To ensure a good filling of the tank with air, the valve 16, the opening 15 and the pipe 14 will be adapted to present a pressure drop in the air passage which is lower than the pressure drop generated by the passage of air through the pipe 4 and the tube 7, in the absence of water from the tank to the bowl.

The control device is advantageously provided with two indicator lights 25, a first (for example green) indicating the proper operation of the fan or the suction device (for example substantially constant electrical consumption or in a given range) and a second (eg red color) indicating a malfunction of the fan (for example in the case of power consumption below a minimum consumption or consumption outside a given power consumption range).

The tank, apart from the openings of the tube and the overflow and the opening for the suction, is substantially completely gastight.

The reservoir has a water presence sensor 26 for determining the presence of a minimum volume of water in the reservoir. When the water level in the tank 2 is below a minimum level, the sensor sends a signal to the control device so that a light signal is emitted (signal corresponding to a volume too low for an evacuation) and also for block the activation of the hunt as long as a minimum volume of water in the tank is not reached.

The control device may also have a timer to trigger the flush after a certain amount of time elapses, for example after 1 to 30 seconds, such as the time required for a user to leave the toilet or be away from the toilet. bowl. In another embodiment, the control device further comprises a presence detector for activating the fan 20 and / or for cocking a flush signal, in particular for a large flush. This detector is then usable to trigger the large flush and / or small flush. This presence sensor may be electronic and / or mechanical, for example a detector by radius or a pressure sensor when a user is supported on the board. In a possible embodiment, this presence sensor can be used to give a signal to the control device to ensure a greater suction of air / gas / odors.

In one embodiment, when the flush is activated mechanically, the control device 10 disables the flush control system.

In another possible embodiment, the presence detector determines the presence of a user in the vicinity of the bowl of the toilet (for example, presence at less than 100 cm, preferably at less than 50 cm. potential user is detected continuously for at least 10 seconds, preferably for at least 15 seconds, preferably at least 30 seconds, the control device allows the hunting controller, in particular automatic control to be activated or activatable. This makes it possible to allow a hunting command only if the user has remained sufficiently close to the bowl and to prevent a hunting command if the potential user has remained close to the bowl for a time less than a predetermined time. (eg less than 30 seconds or less than 15 seconds, or less than 10 seconds).

Similarly, the presence detector may allow the control device 10 to block the flush control if the user has remained in the vicinity of the bowl for a time less than a predetermined time (for example less than 30 seconds or less than 15 seconds, or less than 10 seconds).

A humidity sensor 27 is used to send the control device 10 a signal to ensure greater air suction from the room. This is particularly advantageous when the bowl is in a bathroom.

Indeed, the device thus allows to suck the excess moisture present in the bathroom.

For example, the fan is used to create a depression of the order of 90 to 120 Pa at the inlet of the housing during normal ventilation, and a depression of more than 120 Pa at said inlet 21, when the sensor of humidity detects a humidity level higher than a predetermined value. The volume of air sucked is then advantageously more than 60m3 / h.

In another embodiment, the intake air flow rate is variable (continuously or not, in particular with speed bearings) as a function of the moisture content.

If in the embodiment shown, the valves 16 and 2Ibis open only according to a depression created by the fan or the turbine 20, it is also possible to use control members, such as electromagnets, for order the opening of the valves and the maintenance of these in open position. The opening command can for example be controlled by the control device 10.

The flushing of the tank 2 can be used in a different way, for example in manual, in automatic or in a programmed form.

For example, the flush can be controlled purely manually, with or without a control device 10. The tank is then provided in known manner in two buttons, one actuating the small flush, the other actuating the great hunt.

According to a particular embodiment possible, the control button activates an electromagnet to maintain the flush in the open position, to allow a large flush, when the button is pressed or raised for more than 2 seconds, for example. When the button is manually controlled for less than 2 seconds, the electromagnet is for example not activated, so that when the button is no longer controlled or after a predetermined time, the flush is cut. This hunt corresponds to a small hunt. The small flush time is either determined by the pressure time, or by a control device, or by a float device interrupting the small flush as soon as the water level in the tank is less than or equal to a predetermined level . When the control button is pressed or raised for more than 2 seconds, the tank will remain open to ensure a large flush. The holding in the raised position of the tube 7 will for example be provided by an electromagnet 9. When the water level in the reservoir is lower than a predetermined volume, a sensor can then turn off the electromagnet, to bring the tube 7 back to a position preventing the passage of water from the tank to the bowl.

The button can also be used to disable automatic hunting operation. In automatic operation, a timer or timer acts to delay the action of the flush.

When the control device 10 determines an excessive consumption of energy and thus a clogging of the outlet pipe, the device can control the stopping of the suction device and / or emit a non-use display signal of this device. bowl and / or signal to a service center. Embodiments simpler than that shown in Figure 1 are shown in Figures 2 to 6.

In the embodiment of FIG. 2, the tank is provided with a simple opening 15 with a flap valve 16. Such a toilet is therefore a traditional toilet having an opening 15 with a flapper 16.

In the embodiment of Figure 3, the initial opening of the valve 16 is controlled by the control plate.

In the embodiment of Figure 4, the valve 16 is associated with a float element, so that as soon as the water level is above a predetermined level the valve is in the open position, while as soon as the level of water is below a predetermined level, the valve is in the open position.

In the embodiment of Figure 5, the tube 7 is brought into the raised position by a movement of a manual control. The tube is then held in the raised position by a solenoid or an electromagnet. The solenoid or electromagnet is activated by the movement of the tube, for example by the contact of a portion of the tube on a switch. The time during which the solenoid or electromagnet is kept activated is for example determined by a timer.

Once the time determined by the timer has elapsed, the solenoid or electromagnet is no longer activated and the tube is brought back (for example by the effect of gravity) into its closed position.

The timer therefore controls a switch and advantageously receives information as to the volume of water to be used (small hunt - large hunt).

FIG. 6 is a rear view of a bowl and tank as shown in FIG. 1. However, the bowl of the bowl of FIG. 6 is associated with a pipe 30 extending between the tank (a part of the tank situated at above the overflow level NI) and the pipe or channel 4 bringing water from the tank to the bowl. When the flush is fired, the water passing through the channel 4 will create a depression in the tank 2, but also in the channel 30. This depression in the channel 30 will ensure the rise of water in the pipe 30. This water will be restored gradually when the depression will be less important, which will ensure proper filling of the siphon of the bowl, even if a certain depression is created by the exhaust pipe.

Claims (21)

1. A toilet or urinal bowl comprising or being associated with a water tank, a first pipe intended to bring water from the tank into the bowl, to a second line for discharging liquid waste and / or solids, and a device for controlling an opening or passage between an open position for supplying water from the tank into the bowl via the first line and a closed position opposing the passage of water to the chamber. bowl, said tank having an overflow leading water possibly present above the level of the overflow to the bowl, preferably via the first pipe, characterized in that the tank is associated with a delivery system of air in the reservoir at a level above the level of the overflow, said system comprising a valve, said valve being movable between an open position for at least part of the period during which said opening or p assage is in the open position, and a closed position at least when said opening or passage is in the closed position. 2. Cuvette according to claim 1, characterized in that it comprises means bringing the valve open position substantially as soon as the opening or passage is in the open position. 3. Cuvette according to claim 1 or 2, characterized in that it comprises a means bringing the valve in the closed position at least as soon as the opening or passage is in the closed position. 4. Bowl according to one of the preceding claims, characterized in that the valve is adapted to close a passage or opening extending in a plane forming an angle between 5 ° and 85 °, preferably between 10 ° and 60 ° preferably between 12 ° and 45 ° with respect to a vertical plane. 5. Cuvette according to claim 4, characterized in that the valve has a pivot axis or rotation located at a level greater than the opening or passage. 6. Cuvette according to any one of the preceding claims, characterized in that the reservoir, when the valve is in the closed position and when the opening or the passage is in the closed position, has substantially only the overflow passage for the air between the bowl and the tank, at least partially through the first line. 7. Cuvette according to claim 6, characterized in that the reservoir with the valve in the closed position and the opening or passage in the closed position has a seal such that when a fan sucks a volume of 100 liters per minute per 10 liters of reservoir volume, at least 95%, preferably at least 99% of the air entering the tank is air entering through the overflow. 8. Cuvette according to any one of the preceding claims, characterized in that the valve or its control means is adapted to bring the valve open in case of depression greater than 50 Pa (especially more than 90 Pa, preferably more than 120 Pa) or in the case of a negative pressure variation of at least 50 Pa (in particular more than 90 Pa, preferably more than 120 Pa) relative to the atmospheric pressure. 9. Cuvette according to any one of the preceding claims, characterized in that the valve or its control means is adapted to maintain the valve in the open position in case of depression greater than 50 Pa (in particular more than 90 Pa, preferably more than 120 Pa) or in the case of a negative pressure variation of at least 50 Pa (in particular more than 90 Pa, preferably more than 120 Pa) relative to the atmospheric pressure. 10. A cuvette according to any one of the preceding claims, characterized in that the valve or its control means is adapted to bring and maintain the valve in the closed position in case of depression less than 50 Pa (especially more than 90 Pa, preferably more than 120 Pa) or in the case of a negative pressure variation of less than 50 Pa (in particular more than 90 Pa, preferably more than 120 Pa) relative to atmospheric pressure. 11. Bowl according to any one of the preceding claims, characterized in that the valve is a flexible membrane or a flexible element, said membrane or element being associated with a part or ballast having a weight of at least 20 grams, preferably at least 25 grams, preferably between 30 grams and 200 grams. 12. Cuvette according to any one of the preceding claims, characterized in that it comprises a mechanical means acting on the valve to bring it in the open position when controlling the opening or passage in its open position. 13. Cuvette according to claim 10, characterized in that the mechanical means comprises an electromagnet which, when activated, keeps the valve in its open position. 14. Bowl according to any one of the preceding claims, characterized in that it comprises or is associated with a device for controlling the amount of water passing from the tank to the bowl. 15. A cuvette according to any one of the preceding claims, characterized in that it comprises or is associated with an air suction device and / or smell of the bowl, preferably via the overflow tank. The cuvette according to claim 15, characterized in that the suction device comprises: a housing containing a fan, said housing having a first gas or odor suction opening from at least one of the cuvette and a second discharge opening of the gases or odors sucked by the fan, said casing being located at a level above the bowl, and a duct for bringing the gases or odors sucked by the fan into the discharge pipe, and - a pipe connecting the first pipe to the housing to ensure suction of gas or odors from the bowl. 17. Cuvette according to claim 15 or 16, characterized in that the device comprises or is associated with a means ensuring through the fan an air intake of the room where the bowl is located without passing through the bowl. Toilet bowl associated with or comprising an air suction or odor device for the bowl and / or the room where the bowl is located, in particular a bowl according to one of claims 15 to 17, characterized in that it includes or is associated with at least one indicator, particularly bright, correct operation or malfunction of the suction device and / or the return of air and / or odors and / or clogging of the exhaust pipe. 19. A cuvette according to claim 18, characterized in that the device comprises an electric fan and a control means measuring an electrical consumption by said fan, said control means emitting a good functioning signal when the measured power consumption is greater than one. predetermined value and / or a fault signal when the measured power consumption is less than a predetermined value. A bowl tank according to any one of the preceding claims, said tank having one or more of the features described in any one of claims 1 to 19. 21. Use of a bowl according to any preceding claim, wherein the valve is opened during the passage of water from the tank to the bowl through the passage or opening so as to limit or even avoid the problem of depression created in the tank.