WO2022049033A1

WO2022049033A1 - Bidet system

Info

Publication number: WO2022049033A1
Application number: PCT/EP2021/073895
Authority: WO
Inventors: Tobias Freitag; Martin Raeth; Matthias Heggblum
Original assignee: Lufthansa Technik Ag
Priority date: 2020-09-02
Filing date: 2021-08-30
Publication date: 2022-03-10
Also published as: DE102020122892A1

Abstract

The invention relates to a bidet system (1) for installing in aircraft, the bidet system comprising a bidet bowl (2) and a water supply (3), wherein the water supply (3) comprises a warm water supply (4). There is provided an actuating means (5) for controlling a cleaning valve (6) which controls the throughflow of water from the warm water supply (4) to a cleaning nozzle (7), wherein the cleaning nozzle (7) provides warm water for cleaning a user on the bidet bowl (2), wherein a branch (8) to a pre-flushing line (9) is provided between the warm water supply (3) and the cleaning valve (6). An activatable pre-flushing valve (10) is arranged in the pre-flushing line (9), wherein the pre-flushing line (9) ends with a pre-flushing outlet (11) into the bidet bowl (2). The invention also relates to a corresponding method for operating a bidet system.

Description

bidet system

The present invention relates to a bidet system for aircraft and a corresponding method of operation.

Bidets are generally known for personal hygiene, with special requirements arising for use in aircraft, which result from the limited installation space in the cabin, the limited water availability and official approval requirements. In addition, the associated gray water systems or waste water systems or vacuum waste water systems in an aircraft are usually subjected to negative pressure, so that continuous drainage is not possible.

The invention is based on the object of specifying an improved bidet system for aircraft and a method for its operation.

The invention solves this problem with the features of the independent claims. Further preferred embodiments of the invention can be found in the dependent claims and the associated descriptions and drawings.

According to the basic idea of the invention, a bidet system for aircraft with a bidet basin and a water supply is proposed, the water supply including a hot water supply. An actuating means is provided for controlling a cleaning valve, which controls the flow of water from the hot water supply to a cleaning nozzle, the cleaning nozzle supplying hot water for cleaning a user Zers on the bidet basin. Between the hot water supply and the cleaning valve there is a branch to a pre-rinse line, with a controllable pre-rinse valve being arranged in the pre-rinse line, and with the pre-rinse line ending with a pre-rinse outlet into the bidet basin.

Via the pre-rinse line, cold water in the lines up to the cleaning valve can be exchanged for warm water in a simple manner, so that a user on the bidet basin has warm water from the cleaning nozzle available very quickly for carrying out his personal hygiene. For example, the time it takes to reach warm water with a pleasant 30 °C to 35 °C water temperature at the cleaning nozzle can be reduced by 10 s, in which the user would otherwise have to deal with cold or warm water. colder water according to the initial temperature in the vehicle, which can be, for example, 20 ° C, would rinse his skin.

Using the controllable pre-rinse valve, a pre-rinse can be carried out independently of the action of a user, so that the user has hot water available in a short time when using the actuating means to adjust the water flow from the cleaning nozzle. The pre-rinse outlet is in the bidet basin, so that no additional connection is required for the usually vacuum-operated waste water systems in aircraft.

Due to potential faecal matter in the waste water from the bidet system, the waste water is preferably routed into the aircraft's vacuum waste water system, to which toilets are also connected. As a result, the waste water from the bidet system ends up in a waste water tank on the aircraft. In this context, controllable means that the pre-flushing valve or a valve in general is not provided for manual control, but is controlled electrically, pneumatically and/or hydraulically. Accordingly, a controllable valve can be controlled automatically.

The branch to the pre-rinse line is preferably arranged immediately before or in the immediate vicinity of the cleaning valve, so that the volume of the line that cannot be filled with warm water is as small as possible.

In front of the cleaning valve or also in front of any other element in the water system means that the element is upstream of the normal flow direction of the water. Similarly, the term "after an element" means that the corresponding location is downstream of the element in the water system.

In a preferred embodiment, an anti-siphon valve is arranged between the pre-rinse valve and the pre-rinse outlet in the pre-rinse line and/or an anti-siphon valve is arranged between the cleaning valve and the cleaning nozzle. In this way it can be achieved and ensured that bacterial growth and backflow of gray water or waste water into the water supply is prevented. In the case of the anti-siphon valve between the pre-rinse valve and the pre-rinse outlet in the pre-rinse line, bacterial growth and backflow to the cleaning valve is also prevented. It is also particularly advantageous if there is an anti-siphon valve between the pre-rinse valve and the pre-rinse outlet in the pre-rinse line and between the cleaning valve and the cleaning nozzle arranged in order to avoid contamination of the water supply as far as possible.

The pre-flushing valve can preferably be closed again after a preset period of time. This enables the pre-washing process to be implemented in a simple manner.

In an alternative embodiment, a temperature sensor for the water temperature is provided in front of the cleaning valve and/or in front of the pre-rinse valve. The temperature sensor can be used to determine that the water in the supply line to the cleaning valve has heated up sufficiently, so that the controllable pre-rinse valve can be closed in order to restrict the consumption of further hot water without any loss of comfort. In addition to measuring the water temperature with the temperature sensor, a further preset period of time can be used before the pre-rinse valve closes if the desired temperature is not reached by the hot water supply in a reasonable time. In this case, this enables the bidet system to function at least with colder water and prevents the bidet basin from overflowing by limiting the running time of the pre-rinse process.

In a further advantageous embodiment, a pre-rinse outlet with a line section between the cleaning nozzle and the cleaning valve is an integral component. The design as an integral component allows easy installation on the bidet basin. In addition, the thermal connection in the integral component between the pipe section through which warm pre-wash water flows during pre-washing and the pipe section between the cleaning nozzle and cleaning valve results in preheating, so that the warm water can be cooled down by the heat capacity of the pipes after the opening of the Cleaning valve is reduced. The line section between the cleaning nozzle and the cleaning valve is preferably a line section between the cleaning nozzle and an anti-siphon valve after the cleaning valve. It is also preferred that the cleaning nozzle on the line section is formed by the integral component. Furthermore, in an advantageous embodiment, an aerator can be mounted or attached to the cleaning nozzle. be screwed in to create a visually improved spray pattern when the water pressure is applied.

In a particularly advantageous embodiment, the integral component is designed as a 3D printed part. As a result, the shape can be adapted particularly well to the shape of the bidet basin. A particularly good adaptation to the shape of the bidet basin is also advantageous for the pre-rinse outlet in order to achieve the most inconspicuous integration possible.

According to an advantageous further development, it is proposed that the hot water supply includes a flow heater. Using a continuous-flow heater, the hot water supply can be arranged as part of the water supply in the immediate vicinity of the bidet basin, which considerably shortens the time until sufficiently warm water can be made available. In addition, the bidet system can be integrated more easily in an aircraft in this way. The heating process is started automatically in the instantaneous water heater when the water begins to flow through, which in turn is triggered by activation of the pre-rinse valve. This enables very simple control of the pre-washing process, which can be started in various ways, for example using a button. The bidet system preferably comprises at least one sensor for detecting an intention to use it. A sensor for detecting an intention to use enables an automatically started pre-rinse process, i. H . after a corresponding detection, the actuation of the pre-rinse valve can be started without direct actuation by a user, so that warm water is available very quickly at the beginning of an action of use.

The sensor for detecting an intention to use is preferably set up to detect the open state of a bidet cover on the bidet basin. This sensor can beispielswei se be a magnetic sensor that no longer exists stop the closed bidet lid on the bidet basin or. the edge of the bidet and thus a resulting lid opening is detected. Alternatively or additionally, the stop of a bidet lid in the open state can be detected. Such a magnetic sensor for detecting the position of the bidet cover can be arranged at various positions in the area of the bidet cover. Such a sensor for detecting the open state of the bidet lid is advantageous since the open state is necessary for use, and in this way unnecessary pre-rinsing processes can be avoided.

Furthermore, the sensor for detecting an intention to use is preferably a motion sensor and/or infrared sensor. This sensor is set up to detect the movement of a user in the vicinity of the bidet basin, so that the water supply to the bidet system can be activated as a safety function via an electrically controllable shut-off valve and/or safety valve. Thus, regardless of the lid position, neither a pre-rinse process nor, if necessary, a water loss or the cleaning valve left open It may even be possible for the bidet basin to overflow if there is no person in the sensor range of the motion sensor and/or infrared sensor. Furthermore, in possible embodiments, after the detection of a movement, the pre-rinse valve can be actuated accordingly, for example when entering the bathroom.

In a particularly advantageous embodiment, the bidet system includes a sensor for detecting the opening status of the bidet lid and a motion sensor and/or infrared sensor, so that false positive detections of intention to use can be minimized by combining both sensors.

In an advantageous embodiment, a controllable shut-off valve is provided between the hot water supply and the branch to the pre-rinse line. The controllable shut-off valve can shut off the water flow from the hot water supply regardless of the position of the actuating means for controlling the cleaning valve, so that a cleaning valve that is accidentally left open or not completely closed does not lead to a permanent water flow into the bidet basin. This is particularly advantageous in order to prevent the bidet basin in the aircraft from overflowing, since continuous drainage from the bidet basin is not possible in a sewage system of an aircraft which is usually subjected to negative pressure. In addition, unnecessary water consumption from the reservoir of the commercial aircraft can also be avoided. This can be done, for example, by coupling the opening of the shut-off valve with the detection of an intention to use or the detection of the presence of a person can be achieved by the motion sensor and/or infrared sensor. In a preferred embodiment, the water supply and the hot water supply have an upstream, controllable safety valve. The controllable safety valve basically allows the same functionality as the shut-off valve. However, any inflow of cold water into the bidet system and possibly into a flow heater, into further sanitary installations or into an entire bathroom, so that any secondary flushing with cold water of the bidet basin can also be interrupted with the controllable safety valve in order to prevent the bidet basin in the aircraft from overflowing.

Furthermore, according to the basic idea of the invention, a method for operating a bidet system according to one of claims 1 to 10 with at least one sensor for detecting an intention to use is proposed, comprising the following steps:

- detecting an intention to use;

-Opening the pre-rinse valve and draining water via the pre-rinse outlet when an intention to use has been detected; -Providing hot water in front of the cleaning valve;

- Closing the pre-purge valve.

The process enables hot water to be supplied quickly when the bidet or Bidet system is used, so that the comfort of use is significantly increased. Furthermore, it also enables water to be saved in the aircraft, since the user does not have to manually flush out cold water from the lines using the actuating means, which often leads to flushing out of the water beyond the point in time when it is sufficiently heated. because a user generally wants to avoid starting cleaning with cold water.

It is further proposed that the pre-flush valve be closed after a predetermined time from the opening of the pre-flush valve.

An advantageous method for operating a bidet system with a temperature sensor for the water temperature in front of the cleaning valve and/or in front of the pre-rinse valve is also proposed, with the pre-rinse valve being closed when a target temperature is reached at the temperature sensor.

Closing the pre-rinse valve when the target temperature is reached completes the pre-rinse process and thus limits water consumption. In addition, after closing the pre-rinse valve on the cleaning valve, warm water is available with the maximum flow rate. Basically, it is provided that a user actuates the actuating means only when the pre-rinse valve is closed again after the pre-rinse process. Opening the cleaning valve and pre-rinse valve at the same time results in a lower water flow through the cleaning valve than usual.

In a preferred method for operating a bidet system with an upstream, controllable safety valve, the safety valve is automatically opened when an intention to use is detected.

The controllable safety valve can be used to separate the bidet system from the water supply, so that accidental or generally undesired water leakage in the bidet system, including into the bidet basin, is prevented. The car- Automatic opening of the safety valve makes it possible to keep the bidet system disconnected from the water supply most of the time and to supply the bidet system with water only immediately before a user needs it.

According to a further development, an advantageous method for operating a bidet system with at least one sensor for detecting an intention to use and a safety valve is proposed, the safety valve being opened upon detection of an open bidet lid and a movement in front of the bidet basin. This enables the intended use to be better detected and in this way to reliably prevent the bidet basin from overflowing.

Furthermore, as an independent solution to the problem, a bidet system for aircraft with a bidet basin and a water supply is proposed, with an actuating means for controlling a cleaning valve being provided, which controls the water flow from the water supply to a cleaning nozzle, with the cleaning nozzle supplying water for cleaning a user on the bidet basin, the bidet system comprising a sensor for detecting an intention to use, which is set up to detect the opening status of a bidet lid on the bidet basin, preferably a magnetic sensor in the toilet seat, and a second sensor for Detection of an intention to use, which is a movement sensor and/or infrared sensor, the bidet system comprising a safety valve at the inlet of the water supply of the bidet system, which can be switched depending on the detection of the two sensors.

An appropriate bidet system prevents the bidet basin from accidentally overflowing if a user has unintentionally left the actuating means for controlling the cleaning valve open.

The invention is explained below on the basis of preferred embodiments with reference to the accompanying figures. while showing

Fig. 1 a bidet system with a hot water supply;

Fig. 2 a bidet system with a flow heater;

Fig. 3 a bidet system with non-return valves; and

Fig. 4 an integral component with pre-purge outlet.

FIG. 1 shows a schematic representation of an exemplary embodiment of a bidet system 1 for an aircraft, which has a water supply 3 with a fresh water connection 22 . In this exemplary embodiment, the water supply 3 has a hot water supply 4 with a separate provision of hot water via a hot water connection 24 . Cold water from the fresh water connection 22 is mixed with water from the hot water connection 24 by means of a temperature controller 25 according to the setting of the temperature controller 25 .

A controllable safety valve 21 is installed downstream of the fresh water connection 22 in the bidet system 1 , so that the safety valve 21 does not have to be actuated manually. The actuation can take place electrically, pneumatically and/or hydraulically, in which case in this advantageous exemplary embodiment an electrical actuation with an electrically driven actuator of the safety valve 21 is provided . After the hot water connection 24, d. H . downstream in the regular flow direction, a safety valve 21 is also provided.

The mixed water emerging from the temperature controller 25 is routed via a controllable shut-off valve 20 to a branch 8 . A flow regulator 14 for setting the maximum strength of the water flow is arranged in front of the branch 8 in terms of flow. The branch 8 divides the water line into two lines, one line leads to the cleaning nozzle 7 of the bidet system 1 and the other line is a pre-rinse line 9 which leads to a pre-rinse outlet 11 . Furthermore, in the exemplary embodiment in Figure 1, in addition to the flow regulator 14 before the junction 8, a manual flow regulator 14 is provided in the pre-rinse line 9 and in the line to the cleaning nozzle 7, which is also an alternative to the flow regulator 14 before the junction 8 can be used.

A cleaning valve 6 is provided in the line leading to the cleaning nozzle 7 , the water flow rate of which can be controlled by means of a manual actuating means 5 in this advantageous exemplary embodiment in the form of a rotary handle or water tap. A user can clean the bidet system 1 over the bidet basin 2 in the usual way by actuating the actuating means 5 , which controls a jet of water from the cleaning nozzle 7 . In an alternative exemplary embodiment, the actuating means 5 can also be a button or switch which controls the cleaning valve 6 .

A controllable pre-flush valve 10 is provided in the pre-flush line 9 in front of the pre-flush outlet 11, which can be controlled independently of the position of the cleaning valve 6. so that when the pre-rinse valve 10 is opened, a pre-rinse, i.e. a drainage or rinsing process of the water in the lines of the bidet system 1 up to the part of the cleaning valve 6 that is upstream during normal operation, takes place in the bidet basin 2, without water escaping at the cleaning nozzle 7 arises. The pre-rinse outlet 11 unobtrusively guides the water into the bidet basin 2. In contrast to the cleaning nozzle 7, the water emerging from the pre-rinse outlet 11 is not directed toward a user on the bidet basin 2, but downwards and/or to the side onto the edge of the bidet basin 2. to drain water into the bidet basin 2 with as little splashing and noise as possible.

In this advantageous exemplary embodiment, an anti-siphon valve 12, 13 is used as a system separator in front of the cleaning nozzle 7 and the pre-rinse outlet 11 in order to prevent bacterial growth and backflow of gray water or waste water from the bidet basin 2.

The water from the pre-rinse outlet 11 and the water from the cleaning nozzle 7 first collects in the bidet basin 2 since a waste water outlet 23 in this exemplary embodiment leads to a waste water system in an aircraft that is subjected to negative pressure. With corresponding waste water systems in aircraft, a continuous discharge of the waste water is not possible, so a waste water valve 26 is arranged below the bidet basin 2, which is only briefly opened for discharge into the waste water system via the waste water outlet 23. The opening of the waste water valve 26 is triggered by means of a button 27, the opening of the waste water valve 26 being monitored by a control unit 28 (Flush Control Unit, FCU), controlled and, if necessary. is overdriven. A flushing outlet 29 is also provided for flushing the bidet basin 2 , with which fresh water can be fed into the bidet basin 2 via a flushing valve 30 . The bidet system 1 can also be integrated into a toilet.

The bidet system 1 has a sensor 18 on the bidet cover 19 which is designed as a magnetic switch and detects the opening of the bidet cover 19 . The opening of the bidet cover 19 is correspondingly recognized as an intention to use it, whereupon the pre-rinse valve 10 is automatically opened by the appropriate control. The other controllable valves in the bidet system 1, here the shut-off valve 20 and the or. the safety valves 21 are also opened if they are not already in an open state.

The open pre-rinse valve 10 causes a flow of water from the hot water supply 4, which initially only provides water at the ambient temperature after a longer break in use. As the water flow continues, which is taken from the mixer of the hot water supply and fed into the bidet basin 2 via the pre-rinse outlet 11, the water temperature at the outlet of the temperature controller 25 approaches the preset temperature. The cold or colder water in the pipes is flushed out over time and flushed out with warm water, which increasingly approaches the target temperature.

In an advantageous exemplary embodiment, the opened pre-purge valve 10 is closed again after a predefined time has elapsed, preferably in the range from 2 s to 20 s, for example after 3 s, 6 s or 17 s. A temperature sensor 34 is used downstream, as close as possible to the cleaning valve 6 , to record the water temperature present, which temperature increases over the course of the pre-rinsing process. As soon as the temperature sensor 34 reaches a temperature limit of e.g. 25° C., 30° C. or 35° C. is reached, the pre-purge valve 10 is actuated and closed accordingly. The bidet system 1 is now ready for use with increased comfort.

In the meantime, the user has gone to the bidet basin 2 and controls the flow of water from the cleaning nozzle 7 with the actuating means 5 . In this case, the escaping water only has the ambient temperature for a very short time, corresponding to the volume of water between the cleaning valve 6 and the associated anti-siphon valve 13 . As soon as this small volume of water has been flushed out, the water temperature of the water jet emerging from the cleaning nozzle 7 rises in a short time, for example in 3 s to 25° C., 6 s to 30° C. or 17 s to 35° C. As a result, the period of time during which a user's skin is in contact with cold water is considerably reduced.

FIG. 2 schematically shows an exemplary embodiment of a bidet system 1 in which the hot water supply 4 has a flow heater 17 instead of an external hot water connection 24 . The flow heater 17 is fed via the fresh water connection 22 on the inlet side and is connected to the inlet for hot water on the temperature controller 25 on the outlet side. The inlet for cold water on the temperature controller 25 is connected to the fresh water connection 22 . The inflow of fresh water to the continuous-flow heater 17 and to the temperature controller 25 can be blocked via a manual shut-off valve 31 . Furthermore, the inlet to the flushing outlet 29 can also be used a manual shut-off valve 31 are blocked. The stopcocks 31 can be used, for example, in the event of a leak, so that the line that is still intact can continue to be used.

In this advantageous exemplary embodiment, the bidet system 1 includes a controllable safety valve 21 that can shut off the entire water supply 3 . In addition to the cleaning nozzle 7 and the pre-rinse outlet 11 , this also applies to the rinsing outlet 29 . The controllable safety valve 21 prevents a cleaning valve 6 accidentally left open or only partially open or a flushing valve 30 left open from causing the bidet basin 2 to overflow. For this purpose, the safety valve 21 is closed in its basic position and is only controlled to open when an intention to use the bidet system 1 is detected by the sensor 18 . For this purpose, the sensor 18 can be a sensor for detecting an opening process of the bidet cover 19 and additionally or alternatively a motion sensor which detects the presence of a user in the washroom or the washing cabin in the aircraft detected. A corresponding presence of a user is recognized as a possible intention to use it and the bidet system 1 is automatically supplied with fresh water by opening the safety valve 21 . If there is no movement or If a user is present, the safety valve 21 is activated and closed accordingly.

In an analogous manner, the shut-off valve 20 , which, unlike the safety valve 21 , cannot block the flow of water from the flushing outlet 29 , is only opened when the sensor 18 detects the presence of a user and the opening of the bidet cover 19 . In FIG. 3, the exemplary embodiment from FIG. In commercial aircraft, drinking water systems are provided as a water supply 3 for supplying drinking water, for example for sanitary facilities such as a bidet system 1 or galleys. In the case of drinking water systems in aircraft, provision is made for residual water still in the drinking water system to be able to be drained. This prevents new drinking water from mixing with old drinking water that has been in the drinking water system for too long and, over time, no longer meets the health requirements for drinking water. In addition, when the aircraft is parked, it can be prevented that the water freezes at low outside temperatures. In this context, the entire drinking water system is cleaned with disinfectants at regular intervals. It is also necessary for the disinfectant to run off completely.

The bidet system 1 in the exemplary embodiment in FIG. 3 has two non-return valves 32 which allow the bidet system 1 to be emptied via the inlet 22 . Here, a connection via a non-return valve 32 is provided between the branch 8 and the fresh water lines of the water supply 3 behind the safety valve 21 . Furthermore, a connection via a non-return valve 32 is provided between the flow heater 17 and the fresh water lines of the water supply 3 behind the safety valve 21 . If the valves used in the bidet system 1 are opened appropriately, the remaining water can be emptied completely. A branch connection 33 is provided in this exemplary embodiment on the cold water line. Another junction Circuit 33 is provided between the temperature controller 25 and the hot water outlet of the flow heater 17 .

FIG. 4 shows an integral component 16 with a pre-purge outlet 11, which is advantageously manufactured as a 3D printed part. The integral component includes part of the pre-rinse lines 9 in the last part before the outlet opening 11 and a line section ( 15 ) between the cleaning valve 13 and the cleaning nozzle 7 , which in this advantageous exemplary embodiment can be mounted on the integral component 16 .

Claims

Expectations :

1. bidet system (1) for aircraft with a bidet basin (2) and a water supply (3), wherein the water supply (3) comprises a hot water supply (4), wherein

- an actuating means (5) is provided for controlling a cleaning valve (6), which controls the flow of water from the hot water supply (4) to a cleaning nozzle (7), the cleaning nozzle (7) supplying hot water for cleaning a user on the bidet basin (2) provides, characterized in that

- Between the hot water supply (3) and the cleaning valve (6) a branch (8) is provided to a pre-rinse line (9), wherein

- A controllable pre-flush valve (10) is arranged in the pre-flush line (9), and wherein

- The pre-rinse line (9) ends with a pre-rinse outlet (11) into the bidet basin (2).

2. bidet system (1) according to claim 1, characterized in that between the pre-rinse valve (10) and the pre-rinse outlet (11) in the pre-rinse line (9) an anti-siphon valve (12) and / or between the cleaning valve (6) and an anti-siphon valve (13) is arranged on the cleaning nozzle (7).

3. bidet system (1) according to any one of the preceding claims, characterized in that in front of the cleaning valve (6) and / or in front of the pre-rinse valve (10), a temperature sensor (34) is provided for the water temperature. Bidet system (1) according to one of the preceding claims, characterized in that the pre-rinse outlet (11) with a line section (15) between the cleaning nozzle (7) and the cleaning valve (6) is an integral component (16). Bidet system (1) according to one of the preceding claims, characterized in that the hot water supply (4) comprises a flow heater (17). Bidet system (1) according to one of the preceding claims, characterized in that the bidet system (1) comprises at least one sensor (18) for detecting an intention to use it. Bidet system (1) according to Claim 6, characterized in that the sensor (18) is set up to detect an intention to use the opening status of a bidet lid (19) on the bidet basin (2). Bidet system (1) according to claim 6 or 7, characterized in that the sensor (18) for detecting an intention to use is a movement sensor and/or infrared sensor. Bidet system (1) according to one of the preceding claims, characterized in that a controllable shut-off valve (20) is provided between the hot water supply (4) and the branch (8) to the pre-rinse line (9). Bidet system (1) according to any one of the preceding claims, characterized in that the water supply (3) and the hot water supply (4) has an upstream, controllable safety valve (21).

11. Method for operating a bidet system (1) according to one of the preceding claims with at least one sensor (18) for detecting an intention to use, characterized by the following steps:

- detecting an intention to use;

- Opening the pre-rinse valve (10) and draining water through the pre-rinse outlet (11) when an intention to use has been defective;

-Providing hot water in front of the cleaning valve (6);

-Close the pre-purge valve (10).

12. The method according to claim 11 for operating a bidet system

(1) with a temperature sensor (34) for the water temperature upstream of the cleaning valve (6) and/or upstream of the pre-rinse valve (10), characterized in that the pre-rinse valve (10) is closed when a target temperature is reached at the temperature sensor (34). .

13. The method according to any one of claim 11 or 12 for operating a bidet system (1) with an upstream, electrically operated safety valve (20), characterized in that the safety valve (20) is automatically opened when an intended use is detected.

14. The method according to claim 13 for operating a bidet system

(1) with at least one sensor (18) for detecting an intention to use and a safety valve (20), characterized in that upon detection of a - 22 - opened bidet cover (19) and a movement in front of and / or on the bidet basin (2) the safety valve (20) is opened.