DE202021103094U1 - Arrangement for saving shower water - Google Patents

Abstract

Arrangement for saving shower water,
with a valve,
which is intended to be installed in the shower water line leading to a shower head (8), and which can be automatically switched between an open position and a closed position, in such a way that it automatically releases the shower water stream flowing through the shower water line in its open position or in interrupts its closed position,
and with a sensor (10),
which is destined to
to detect the presence of a person in the shower and in this case to generate a presence signal,
and that the valve can be controlled electrically in such a way that the valve can be moved either into its open position or into its closed position by means of electrical opening or closing signals,
,
characterized,
that the sensor (10) is designed and intended to detect by sensors only a sub-area called the sensor area within the shower, in such a way that, in addition to the sensor area, there remains a blind area within the shower that allows a person to stay.

Description

The innovation relates to an arrangement according to the preamble of claim 1.

A non-generic arrangement to save shower water is known from practice. It has a time switch device by means of which the valve of the arrangement, which is arranged in the shower water pipe in addition to a shower fitting provided anyway, only remains in its open position for a predetermined period of time after opening and then automatically switches to its closed position. The time switch device is typically activated by inserting a coin. The effect of saving shower water in these cases results firstly from the showering person's motivation to invest as few coins as possible. But both in these cases and in generic arrangements in which the valve is designed as a push-button valve without inserting coins and the valve returns to its closed position in a timed manner after the push-button is pressed, the second saving effect achieved is that the shower water flow is reliable after the shower is finished is interrupted, for example in public facilities in which the showering people leave the shower without closing the shower faucet.

While showering, the shower water flow is only interrupted in a time-controlled manner, depending on the preset time of the timer. If, for example, the showering person does not want to be exposed to the shower water, e.g. while soap or shampoo is being applied, this person will typically not operate the shower fitting in order to avoid having to readjust the amount and temperature of the shower water flow afterwards. Rather, it usually steps to the side in order to avoid the shower water, so that the shower water flow continues unabated even during the times when the shower water is not needed. In private households, generic arrangements for saving shower water have therefore not found widespread use, since on the one hand the closure of the shower fitting is usually ensured after the shower is finished and on the other hand the exclusively time-controlled interruption of the shower water flow that does not match the shower behavior can lead to undesirable situations, namely to interrupt the shower water flow at an inopportune time.

A generic arrangement is from the DE 20 2020 105 379 U1 known. It has a sensor in the floor of the shower. The sensor detects the presence of a person in the shower and opens or closes the valve as a function of this. This arrangement can be used to save shower water, for example, when it automatically ensures that the water supply to the shower head is interrupted.

The object of the innovation is to improve a generic arrangement in such a way that it enables both the saving of a particularly large proportion of shower water and the control of the shower water flow in an individual adaptation to the showering behavior of the showering person.

This object is achieved by an arrangement with the features of claim 1. Advantageous refinements are described in the subclaims.

In other words, the innovation suggests sensing the presence of the showering person. For this purpose, a sensor is provided which only senses a sub-area within the shower called the sensor area. As a result, in addition to the sensor area, there remains an area within the shower in which the presence of the person is not detected and which is dimensioned so large that a person can stay in it. This area not detected by the sensor is called the blind area. For example, the sensor can be designed as a sensor surface on or in the floor of the shower, the sensor surface being located, for example, within the shower where the shower water hits the floor surface of the shower. If a person stands in the sensor area, for example on the sensor area mentioned, the valve of the arrangement opens automatically, and if the person changes from the sensor area to the blind area, for example leaves the sensor area and stands next to it on the shower floor, this will happen Valve closed automatically. This corresponds to the usual practice described above of standing next to the shower water jet while applying soap or shampoo. According to the innovation, the shower water flow is also reliably interrupted during such interruptions or pauses, so that the effect of water saving is maximized, specifically in an exact, individual adaptation to the respective behavior of the person using the shower. The proposed arrangement is therefore also ideally suited for use in private households.

At the same time, it is also ensured, as in the case of the generic prior art, that the flow of shower water is interrupted after the shower is finished, so that even in public facilities where the shower faucet may be used after the end of the shower Shower bath is not closed, the water saving is achieved as well as by a time-controlled arrangement. In cases where the time-controlled arrangement was actuated again shortly before the end of the shower, the arrangement according to the invention even enables an improved saving effect, because the time-controlled after-run of the shower water flow is avoided and instead the valve is brought into its closed position as soon as the person the Leaves the sensor area.

According to the proposal, the sensor is designed and intended in such a way that it senses only the sub-area within the shower that is designated as the sensor area.

This can be achieved on the one hand by a corresponding structural design of the sensor, for. B. by a diaphragm which is arranged in front of a working with beams sensor, z. B. a sensor designed as a camera, radar or the like. An adjustability of the panel can make it possible to adjust the detection area of the sensor as desired to the respective installation position and the design of the shower, e.g. B. adjust their size.

On the other hand, regardless of the structural design of the sensor, its detection range can be influenced and adapted as required so that the alignment of the sensor can be influenced, e.g. B. by this is pivoted. With the appropriate alignment of the sensor is z. B. only part of its detection area is directed into the interior of the shower and forms the sensor area there, while another part of the detection area is directed against a wall of the shower, so that a sufficiently large blind area remains in the shower in addition to the sensor area which a person can stay.

The two possibilities mentioned, namely first the structural design and second the alignability of the sensor, can advantageously be implemented in combination in order to be able to reliably set up the sensor area and the blind area even with different installation locations and differently designed showers.

A technically comparatively simple design of the sensor can be implemented in the form of a pressure-sensitive sensor mat that is placed on the floor of the shower, specifically only on a partial area of the floor. The sensor mat makes it immediately clear to the shower user where the sensor area is located, and the sensor area is also limited to the lowest area in the shower, namely the sensor mat itself, so that after leaving the sensor mat, the entire space above the sensor mat can be used inside the shower without triggering an undesired opening of the valve. The showering person can accordingly move easily above the sensor mat, for example bend their arms or legs, without getting into the sensor area.

In the following, the innovation is explained purely by way of example using an example in which the sensor is designed as a sensor surface, i.e. either as a sensor integrated into the floor of the shower, or as a sensor mat that can be retrofitted to any existing shower by adding is placed on the floor of the shower. Despite this exemplary mention of a sensor surface, the configuration of the proposed arrangement for saving shower water is not restricted to the fact that the sensor must be configured as a sensor surface.

The presence of the person on the sensor surface is recorded by sensors. Depending on this, either a presence signal is generated when the person is on the sensor surface, or an absence signal is generated when the presence of a person on the sensor surface is not detected. It is only essential that a sensor can automatically distinguish whether or not a person is on the sensor surface. For several reasons it can be advantageous to use the presence of the person to generate a presence signal, so that this mode of operation of the proposed arrangement is always described below without, however, fundamentally excluding the reverse mode of operation. Since, as expected, the rest times when no person is on the sensor surface will be considerably longer than the usage times when a person is on the sensor surface, significant energy savings are associated with generating presence signals rather than absence signals.

The valve of the proposed arrangement can be controlled electrically. The signal output by the sensor surface, typically the presence signal, can therefore be used to control the valve from its closed position into its open position. This can be done directly by means of the presence signal acting on the valve. However, a controller can be provided in the form of an interface, which evaluates the presence signals and then in turn controls the valve. The signal that guides the valve in its open or closed position is accordingly referred to as an open or close signal, regardless of whether it is there is directly about the presence or absence signal or a signal generated by the mentioned control.

The signals from the sensor surface to the valve can be transmitted by wire, for example if the sensor surface is integrated into the floor of the shower and a corresponding signal line runs to a valve assembly, which can be hidden in a wall of the shower, for example, and the shower water pipe there at a distance optionally interrupts or releases from the shower head.

In another embodiment, the signal is transmitted via a radio link, so that the laying of a signal line is not necessary and the proposed arrangement can also be retrofitted in existing showers without having to open the existing floor or wall surfaces of the shower. In this case, the sensor surface is assigned a transmitter that transmits the presence or absence signal, and a radio receiver that receives the presence or absence signals is assigned to the valve. Due to the expected comparatively low energy density of the radio signals, the already mentioned control can advantageously be provided in this embodiment of the arrangement, which sends out sufficiently strong opening or closing signals based on the comparatively weak presence or absence signals received to initiate the movement of the valve in its open or closed position To effect closed position.

In one embodiment, the valve can be designed as a solenoid valve. Solenoid valves typically automatically assume a certain switching position, for example supported by the force of a pretensioned spring. Against the spring action, the valve body of the solenoid valve can be moved into its other switching position when an electromagnet is supplied with energy. For the proposed arrangement it can therefore be provided that the solenoid valve automatically assumes its closed position and moved against the spring action into its open position and held in this open position as long as the presence signal is generated - or the absence signal is interrupted.

In another embodiment, the valve can be designed as an electrical actuator. This enables the arrangement to be operated which requires as little electrical energy as possible. In order to move the actuator into a certain position and then to hold it in this position, no permanent signal is required, but only a pulse-like signal, since the actuator automatically maintains its position.

If the sensor surface is not integrated into the floor of the shower, but rather is designed as a separate sensor mat, it can advantageously also have a self-sufficient electrical energy source in addition to the radio transmitter. In this way, retrofitting an existing shower with an arrangement according to the proposal is made possible in a particularly simple manner. In addition, the separate component, which is the sensor mat, makes it immediately clear to users of the shower where they can be, either to let the shower water flow or to interrupt it.

Alternatively, it can be provided that the sensor surface is integrated into a floor surface which is intended to form the floor of a shower. It can be a shower tray or shower tray, or a separate floor surface if the floor of the shower consists of several components and, for example, a drainage channel runs around the floor surface, and this floor surface is therefore designed as a separate component. The energy supply of the sensor surface can take place from the outside, so that the sensor surface does not necessarily have to be equipped with an autarkic energy source. If the sensor surface is integrated into the floor surface of the shower, an optical or haptic design, for example in the form of a corrugation or roughening, can make it clear in which area of this floor surface the sensor surface is arranged, in order to make it clear to the users of the shower where they can stop to either let the shower water flow or stop it.

For the mentioned possibility of retrofitting the arrangement according to the innovation in an existing shower, the valve and an autarkic electrical energy source can advantageously be combined to form a common assembly. This assembly can be inserted into the shower water pipe near the shower head. For this purpose, it has on the one hand a first threaded connection which enables the shower head to be connected to this assembly, in that the connection thread of the shower head can be screwed to the threaded connection of the assembly. On the other hand, the assembly has a second threaded connection with which a shower hose can be screwed. The assembly can therefore be used as an intermediate piece between the shower hose and the shower head, instead of screwing the shower head directly to the shower hose. In the event that the sensor sends out sensor signals that are transmitted by radio, the mentioned assembly also has a radio receiver assigned to the valve, so that this assembly can be mounted, for example, near the shower head and the sensor, for example, as the one mentioned Sensor mat can be designed that lies on the floor of the shower.

As an alternative to this embodiment described, it can be provided that the assembly that has the valve and the self-sufficient electrical energy source is not arranged between the shower head and shower hose, but rather where the shower hose is connected to a wall outlet of the shower water pipe. While the threaded connections of the assembly may be configured in the same way as when connecting to the shower hose and the shower head, the dimensions of the assembly and in particular the position of the threaded connections can be adapted so that the assembly can be mounted close to the wall. If the shower head including shower hose is not arranged in a holder called a shower rod, but is held in the hand, the handling of the shower head is facilitated in this embodiment described because the assembly with its structural dimensions and weight is not handled together with the shower head is needed, but remains stationary at the wall outlet and runs from the assembly from the shower hose to the shower head. In this case too, the valve assembly can optionally also contain a radio receiver if it is provided that the sensor signals are transmitted by radio.

• Erstens müssen nicht zwei separate Elemente der Anordnung installiert werden, so dass schon allein dadurch der Installationsaufwand bei der Nachrüstung reduziert wird.

In view of the possibility of retrofitting existing showers with the valve assembly mentioned, particularly simple retrofitting can be made possible in that the assembly to be mounted also contains the sensor itself. The simplification in retrofitting has several effects:

• Firstly, it is not necessary to install two separate elements of the arrangement, so that this alone reduces the installation effort when retrofitting.

Secondly, the radio transmission means can be dispensed with, since the signal transmission from the sensor to the valve or to a controller can take place in the shortest possible way in a wired manner within the valve assembly.

Thirdly, no separate, second energy supply of a separate second element containing the sensor is required; rather, all components of the entire valve assembly can use the same energy store.

Fourth, the structural design of the proposed arrangement can be simplified insofar as the valve assembly can be protected against water in a simpler way than if a sensor surface is provided, which is provided on the floor of the shower and is thus exposed to the pressure load from the showering person, and also is exposed to water hitting from a considerable height, and which can ultimately also be completely submerged if, for example, the water in a shower tray builds up to a certain height exceeding the height of the sensor surface. Rather, the valve assembly including the sensor can be arranged in the area of the shower head or a wall outlet and only needs to be configured to be splash-proof.

If the valve assembly is installed, for example, in the area of the shower head and also contains the sensor, the sensor can be designed as a radar, for example. It is possible to limit the detection range of the radar towards the bottom. In particular, if this adjustment can be carried out by the user himself, it can be adapted to the person's head, for example. As soon as the person moves their head out of the sensor area, for example by stepping to the side, the valve is automatically closed and the shower water flow is interrupted. The person can then move their arms and legs largely freely without coming into the sensor area.

If the valve assembly is not installed near the shower head but at a wall outlet and also contains the sensor, the sensor can, for example, have an approximately horizontal detection area and be oriented so that only a partial area of the cross section of the shower is in the detection area. If a person is outside this sub-area, namely in the blind area, there is a large space above this detection area in which the person can move their arms and upper body freely, for example, without getting into the detection area.

In one embodiment it can be provided that the valve completely interrupts the shower water line in its closed position. In this way, maximum water savings are made possible.

In another embodiment, an only partial interruption can be provided so that the shower water flow is only reduced, but not completely interrupted. This makes it possible, for example, to clean a shampoo bottle after shampooing, before it is put back and before the full flow of shower water is used again. The reduced shower water flow is also referred to as the control jet in the context of the present proposal. It indicates that the shower faucet is not closed is. In public facilities this means that, for example, a caretaker or pool attendant can recognize which shower fittings still need to be closed, while on the other hand a considerable amount of water can be saved until the shower fitting is closed compared to if the entire shower water flow were to flow unhindered. In private households, the control jet will, as expected, mean that the valve assembly is not misused as a kind of comfort switch and that the shower is left with the shower faucet open. In this way, undesirably large shower water consumption or possibly also flooding and the associated damage can be avoided, which could possibly occur if the shower fitting were not closed and only the valve assembly would be exposed to the entire water pressure and open after some time due to the water pressure would. In this context, the control jet also ensures that after the shower fitting is closed, the line to the valve assembly is no longer under the water pressure, but rather this pressure can be reduced, since the valve does not completely but only the shower water line in its closed position partially interrupts.

In one embodiment, it can be provided that the valve can be adapted to the wishes of the user insofar as its closed position and / or its open position can be set, that is, the valve can be programmed. For example, because the valve does not open completely in the open position, the water-saving effect can also be supported when the shower water flow is to be used. And in the closed position, as described above, it can be provided that the valve does not completely interrupt the flow of shower water. In particular, when an electric actuator is used as a valve, such programming is possible without problems from a technical point of view. In response to the corresponding opening or closing signal, the valve moves to the previously programmed position. In order to make programming as easy as possible for the respective user, it can be done via an app, for example, so that the various setting options are visualized for the user on the display of a mobile device and a feedback can also be displayed that contains, for example, the information that the corresponding programming command has been received and implemented and the desired programming has thus taken place.

In one embodiment, it can be provided that the sensor surface has an optical sensor that detects the presence of a person on the sensor surface, for example in the manner of a light barrier or by means of a camera. The mentioned light barrier can use light beams directed upwards from the sensor surface, which are reflected by a person standing on the sensor surface, so that the corresponding receiving surfaces for the reflected light can also be arranged in the sensor surface.

In another embodiment that is considered advantageous, however, the sensor surface can have a pressure sensor. This enables an uncomplicated and particularly functionally reliable design of the sensor surface, since, for example, dirt on the sensor surface or the water escaping from the shower cannot lead to unwanted reflections that could impair the function of an optical sensor, for example.

For safety reasons, an electrical low-voltage operation of the arrangement is advantageously provided, with voltages that are less than 12 volts. Therefore, all components of the arrangement are preferably designed to operate with a voltage of less than 12 volts. In particular, the voltage used can advantageously be less than 9 V, and in an embodiment considered to be particularly advantageous, the electrical components can be operated with a voltage of less than 5 V. In the first practical tests it has been found that an independent energy supply of both the sensor surface and the valve assembly with commercially available accumulators is excellent and possible over a sufficiently long period of use, which have a nominal voltage between 3 and 4 V.

The use of accumulators enables the electrical energy storage device to be operated for years in an ecologically advantageous manner. An operating voltage of 5 V or less is not only a design of the arrangement that is particularly safe from a health point of view, but also makes it possible to use rechargeable electrical energy storage devices that can be charged at commercially available and widespread USB connections, for example with the help of power packs such as those used for mobile radio devices be used, or with the help of so-called power banks.

In one embodiment, it can advantageously be provided that the components of the arrangement are encapsulated in a watertight manner. In order to be able to charge the electrical energy store, it can be provided, for example, that it can be charged inductively.

Provision can be made to integrate the arrangement into a “smart home” environment so that, for example, status messages such as the battery level can be displayed on a mobile radio device such as a smartphone, as well as error messages or similar information. Furthermore, this integration can influence the arrangement, for example it can be provided to influence the sensitivity of the sensor so that in this way the division of the space within the shower into the sensor area on the one hand and the blind area on the other hand can be influenced by the user of the arrangement . The arrangement can accordingly be configured in such a way that it can establish a radio connection to the “smart home” environment and transmit and, if necessary, receive the corresponding signals.

In one embodiment it can be provided that the arrangement itself generates electrical energy that can be used for its operation. Different types of electrical generators can be used, possibly also in combination, in order to complement one another and to maximize the yield of the electrical energy generated. In the area of the sensor surface, only the functionality of the sensor itself and the operation of the radio transmitter must be enabled, which requires comparatively little electrical energy. By generating electrical energy in the area of the sensor surface, it is therefore possible that completely self-sufficient operation of the sensor surface can be achieved. However, if the amount of energy generated is not sufficient to operate the sensor surface energetically self-sufficient, at least the energy generated can be used to charge an energy storage device, so that until the energy storage device is consumed or until the next external charging of the energy storage device is required, the useful life of the Energy storage can be extended. Due to the possibility of at least partially compensating for the energy consumption by means of the generator, an energy storage device with a low electrical storage capacity and correspondingly small structural dimensions can be used, which is particularly advantageous when designing the sensor surface as a separate component, namely in the form of a sensor mat can.

For example, the sensor surface can have an electrical generator that is actuated by pressure, for example by the weight of a person who steps on the sensor surface. This pressure-operated generator generates the electrical energy required to operate the sensor and / or the radio transmitter. This energy can be fed directly to the sensor or the radio transmitter, but this energy can advantageously be temporarily stored in an electrical energy store. If the sensor surface is operated independently, the stored energy can be retrieved later, and if the sensor surface is not operated independently, filling the energy storage device with the generator can extend the service life of the energy storage device until the next replacement or charging.

A configuration of a pressure-dependent generator in the sensor surface can consist in using one or more piezo elements.

An electric generator can also be assigned to the valve. Since mechanical work has to be carried out in order to move the valve into its open or closed position, in addition to the energy requirement of any radio receiver and any controller, the energy requirement of the valve assembly is expected to be greater than the energy requirement of the sensor surface.

In one embodiment, a generator assigned to the valve can have an impeller which is driven by the shower water current. In this way, a rotary drive for a dynamo-type generator is provided, so that electrical energy can be generated during the entire service life of the shower, namely when the shower water is flowing.

An embodiment of the electrical generator that can be used in the area of the sensor surface or in the area of the valve can provide for the use of an expansion element which operates in a temperature range of 20 to 35 ° C, i.e. has different dimensions in this area depending on the temperature. Starting from a room temperature of around 20 ° C, such an expansion element expands when it is heated by the warm shower water. By appropriately positioning the expansion element in the sensor surface or in the valve assembly, the desired heat transfer from the shower water to the expansion element can be ensured. Subsequently, after the shower, the expansion element gradually returns to its original expansion according to room temperature. The expansion and contraction movements of the expansion element in one or in both directions can be used as compressive and / or tensile forces to drive a generator.

An exemplary embodiment of the innovation is explained in more detail below on the basis of the purely schematic illustration.

The drawing shows a perspective view of a section from a shower cubicle 1 , with a floor area 2 the shower as part of or on a room floor 3 is arranged and with walls 4th that affects both the room itself and the shower cubicle 1 at the side, as well as with a blanket 5 showing the room and the shower cubicle 1 limited upwards.

On a wall 4th there is a shower faucet 6th , which is used in a manner known per se to adjust the flow rate and temperature of the shower water stream. The shower faucet 6th In the illustrated embodiment, it also serves as a wall outlet for a shower water pipe. At this wall outlet, i.e. at the shower fitting 6th , closes a shower hose 7th at that to a shower head 8th leads. On the same wall 4th like the shower faucet 6th is also a shower rod 9 mounted on which the shower head via a bracket not shown in detail 8th can be held.

One arrangement for saving shower water has, on the one hand, a sensor surface 10 either as a separate sensor mat on the floor surface 2 the shower can be placed or in the floor area 2 can be integrated. The sensor area 10 contains one or more pressure sensors, so that the presence of a person on the sensor surface 10 can be detected automatically. Furthermore, the sensor area 10 assigned to a radio transmitter. In the illustrated embodiment, the pressure sensor automatically generates a presence signal when the presence of a person on the sensor surface 10 is detected. This presence signal is transmitted by means of the radio transmitter. Finally is the sensor area 10 associated with an electrical energy store which enables the radio transmitter to be operated and which, depending on the configuration of the sensor, also enables the pressure sensor to be operated. The energy store is designed as a rechargeable battery with a nominal voltage of 3.3 V.

The arrangement for saving shower water also has a valve assembly 11 on. In the illustrated embodiment, the valve assembly 11 the shape of a circular disc, which is axially penetrated by a pipe section of the shower water pipe. The valve assembly is provided by corresponding, complementary threaded connections 11 has been installed as an intermediate element, which the shower hose 7th and the shower head 8th connects with each other. The thickness of the circular disk ensures that an electrically controllable valve, several electrical energy stores, a radio receiver and an electronic control can be accommodated therein. The radio receiver receives the from the radio transmitter of the sensor surface 10 sent presence signals. The electronic control evaluates these signals and serves as an interface, which emits an opening signal, which is activated accordingly when a person is present on the sensor surface 10 the valve of the valve assembly 11 controls in its open position. In this open position, the line section of the shower water line, which is in the valve assembly 11 is located, are flowed through.

If the presence signal is omitted, for example if a person touches the sensor surface 10 leaves, this is also controlled by the electronic control of the valve assembly 11 evaluated and the control accordingly emits a closing signal, so that the result is the valve of the valve assembly 11 occupies its closed position.

By means of the arrangement for saving shower water with accordingly the shower water flow is always automatically interrupted, regardless of the setting of the shower fitting 6th when there is no person on the sensor surface 10 stops. If during a shower the person touches the sensor surface 10 leaves to avoid the shower water jet, the shower water flow is automatically interrupted and shower water is saved.

List of reference symbols

1

Shower cubicle

2

Floor area

3rd

Room floor

4th

Wall

5

ceiling

6th

Shower faucet

7th

Shower hose

8th

Shower head

9

Shower rod

10

Sensor area

11

Valve assembly

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 202020105379 U1 [0004]

Claims (26)

Arrangement for saving shower water, with a valve which is intended to be installed in the shower water line leading to a shower head (8) and which can be automatically switched between an open position and a closed position, such that it automatically passes through the shower water line Releases flowing shower water stream in its open position or interrupts it in its closed position, and with a sensor (10) which is intended to detect the presence of a person in the shower and in this case to generate a presence signal, and that the valve is electrically controllable in such a way that the valve is optionally movable into its open position or into its closed position by means of electrical opening or closing signals, characterized in that the sensor (10) is designed and intended to only cover a sub-area referred to as the sensor area within to detect the shower by sensors, in such a way that, in addition to the sensor area, a blind area that allows a person to stay remains inside the shower. Arrangement according to Claim 1 , characterized in that the sensor (10) is arranged in an assembly that can be handled separately from the valve. Arrangement according to Claim 2 , characterized in that the sensor (10) is designed as a sensor surface that can be placed on the floor of the shower. Arrangement according to Claim 2 or 3 , characterized in that a radio transmitter is assigned to the sensor (10) and a radio receiver is assigned to the valve in such a way that an opening signal can be transmitted to the valve on the basis of the presence signal. Arrangement according to one of the preceding claims, characterized in that the valve is designed as a solenoid valve. Arrangement according to one of the Claims 1 until 4th , characterized in that the valve is designed as an electrical actuator. Arrangement according to one of the preceding claims, characterized in that the arrangement has a control which is intended to evaluate the sensor signals and to output opening or closing signals to the valve. Arrangement according to Claim 3 , characterized in that the sensor surface (10) is designed as a sensor mat which has the radio transmitter and an autarkic electrical energy source. Arrangement according to one of the preceding claims, characterized in that the sensor (10) is designed as a sensor surface which is integrated into a floor surface (2) which is intended to form the floor of a shower cubicle (1). Arrangement according to one of the preceding claims, characterized in that the valve and an autarkic electrical energy source are combined to form a valve assembly (11) which can contain the radio receiver and which on the one hand has a first threaded connection which is intended to be connected to the connecting thread of a To cooperate shower head (8), and which on the other hand has a second threaded connection which is intended to cooperate with the connection thread of a shower hose (7). Arrangement according to one of the Claims 1 until 9 , characterized in that the valve and a self-sufficient electrical energy source are combined to form a valve assembly (11) which can contain the radio receiver and which on the one hand has a first threaded connection which is intended to interact with the connecting thread of a wall outlet, and which on the other hand has a second threaded connection which is intended to interact with the connection thread of a shower hose (7). Arrangement according to Claim 10 or 11 , characterized in that the valve assembly (11) also has the sensor (10) in such a way that the entire arrangement is designed as a retrofittable assembly unit. Arrangement according to one of the preceding claims, characterized in that the valve in its closed position partially interrupts the shower water line in such a way that the shower water flow is only reduced to a control jet without a complete interruption. Arrangement according to one of the preceding claims, characterized in that the valve is programmable in such a way that its position in the open position and / or the closed position is adjustable. Arrangement according to one of the preceding claims, characterized in that the sensor (10) is designed as an optical sensor. Arrangement according to one of the preceding claims, characterized in that the sensor (10) is designed as a pressure sensor. Arrangement according to one of the preceding claims, characterized in that the sensor (10) is designed as an ultrasonic sensor. Arrangement according to one of the preceding claims, characterized in that the sensor (10) is designed as a radar sensor Arrangement according to one of the preceding claims, characterized in that the electrical components of the arrangement are designed to work with a voltage which is less than 12 V. Arrangement according to Claim 19 , characterized in that the electrical components can be operated with a voltage of less than 5 V. Arrangement according to one of the preceding claims, characterized by an electrical generator which is intended to generate electrical energy for operating the arrangement. Arrangement according to Claim 21 , characterized in that the electrical generator has an expansion element which has different dimensions in the temperature range from 20 ° C to 35 ° C depending on the temperature. Arrangement according to Claim 21 or 22nd characterized in that the sensor surface (10) has an electrical generator which can be actuated by pressure and which is intended to generate electrical energy for the operation of the sensor and / or the radio transmitter of the sensor surface (10). Arrangement according to Claim 23 , characterized in that the electrical generator has one or more piezo elements. Arrangement according to one of the Claims 21 until 24 , characterized in that the valve has an electrical generator which is intended to generate electrical energy for the operation of the valve and / or the radio receiver. Arrangement according to Claim 25 characterized in that the electrical generator has an impeller which can be driven by the shower water flow.

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