CH709814A2 - Device and method for monitoring the hygienic status of a drinking water installation. - Google Patents

Abstract

A device (1) or a method for monitoring the hygienic status of a drinking water installation (2) with at least one water tapping point (3) is presented. This monitoring device (1) comprises at least one power supply (4), a sensor (5), a controller (6) and a display (7), which are each operatively connected to each other. The sensor (5) is designed to detect the use or a completed qualified water change at the water removal point (3) and to output sensor signals (8) to the controller (6). The controller (6) is designed for evaluating these sensor signals (8) on the basis of predetermined selection criteria and for outputting status signals (9) corresponding to the current use or the qualified water change and the selection criteria.

Description

Concerns a device and a method for monitoring the hygienic status of a drinking water installation with at least one water tapping point. In this case, such a monitoring device comprises at least one power supply, a sensor, a controller and a display, which are each operatively connected to each other.

Conventionally, the hygienic status of a drinking water installation is determined primarily by microbiological examinations at sampling points. Drinking water samples are taken, inter alia, via sampling valves from the drinking water installation in the building or the drinking water heater, with the vast majority of withdrawals take place via sanitary fittings in the periphery. Studies using growth cultures for the detection of microorganisms have the disadvantage that they are very time consuming and costly. Due to the large amount of work, only selected outlets are used, always in the hope that these samples are representative of the entire installation. However, recent research shows that today's number of sample points do not always guarantee this. In addition, although microbiological studies provide information on the hygienic status of drinking water at these sampling points or even only the currently used sanitary fitting, these studies can neither statements about a possible spread of microorganisms in the widely branched pipeline network nor provide information on the technical causes of the Problems because at the time of the investigation, only a "snapshot" is created.

The current number of samples at the same time so there is only an incomplete picture of the hygienic status of a drinking water installation again. Thus, high numbers of bacteria at individual sampling points usually lead to a large expansion of the investigations. This is the only way to find out whether the entire installation, individual areas or even individual sanitary fittings are affected. This is followed by a technical inspection of affected areas in order to identify and eliminate the causes of the problems. Both the investigations and the technical inspection are works that can only be carried out by experts. For these reasons, it is today the operator of a drinking water installation with reasonable effort not possible to identify prophylactic and normal operating personnel possible vulnerabilities, for example, caused by inadequate use of sampling points and inappropriate temperatures. Depending on the country and building type, for example, water temperatures of 50 ° C to 65 ° C are considered effective against excessive proliferation of bacteria such as Legionella. In the cold water range, the lowest possible temperatures (preferably below 25 ° C) are usually sought; There are also requirements for a regular water change, which has been set in accordance with DIN EN 806-5 European on at least every 7 days, and in accordance with VDI 6023 even every 3 days. These time intervals are already used in the planning for the intended operation of a drinking water installation, but they can not be checked in operation as a prerequisite for hygiene with today's technical building equipment for individual sampling points without increased technical and human resources. Since individual contamination sources in an installation can endanger the entire installation hygienically, early detection by laymen or normal operating personnel would be particularly important in order to minimize the high number of water-borne illnesses in the health sector and, moreover, for economic reasons.

The object of the present invention is to propose an alternative device or an alternative method for monitoring the hygienic status of a drinking water installation, even laymen without special technical training or normal operating personnel use this device or can apply this method.

This object is achieved according to a first aspect with a device for monitoring the hygienic status of a drinking water installation according to the features of claim 1. This object is achieved according to a second aspect with a method for monitoring the hygienic status of a drinking water installation according to the features of claim 13. Preferred developments of the device according to the invention or of the method according to the invention as well as further inventive features emerge in each case from the dependent claims.

Advantages of the present invention include: <tb> 1. <SEP> In the simplest case, the hygienic status of the water tapping point of a drinking water installation can be recorded and displayed in a clearly understandable way by means of physical parameters such as frequency of use, service life, amount of use and / or course of the water temperature. At the same time, the number of microbiological water examinations can be minimized, since a high number of physical parameters are known, which indirectly reflect the hygiene status. <tb> 2. <SEP> The physical parameters such as e.g. Temperature, water change, duration of water change can e.g. be displayed via optical signals or the display of values directly at the sampling points or centrally via the building automation system. With a simple version of the hygiene sensor, they are immediately readable on site and without further aids by laymen. In addition or integrated, a documentation module (datalogger) can also record a large number of events and, if necessary, also enter them in a decentralized or centralized calendar. <tb> 3. <SEP> The simplicity of the device according to the invention makes it possible for all removal points of a drinking water installation, and depending on demand also at selected points in distribution and riser lines, depending on a cost. To provide a device that allows easy capture, evaluation and visualization of the user behavior and hygienically required temperature collectives. Thus, a user can directly control possible weak points in a drinking water installation or inadequate use (for example during a walk-through or centrally via a building automation system or a central computer) and, if necessary, take technical countermeasures in the short term before hygienic risks occur. <tb> 4. <SEP> The Hygienic Sensor and the Documentation Module can be used separately or together as an option to control electronic components of the drinking water installation for automatic water change, for water distribution in the drinking water installation or for "cold" and "warm" temperature control " head for.

In the following, the monitoring device according to the invention and the monitoring method according to the invention are explained in more detail on the basis of schematic drawings which do not limit the scope of the present invention and are merely exemplary embodiments. Showing: <Tb> FIG. 1 <SEP> is a schematic view of a device for monitoring the hygienic status of a drinking water installation; <Tb> FIG. 2 <SEP> a simple variant of a display with a single optical element for the status display when monitoring a cold water tap or hot water tap; <Tb> FIG. 3 <SEP> An improved variant of a display with a plurality of optical elements for the status display when monitoring a cold water / hot water extraction point.

As a result, the monitoring device according to the invention and the monitoring method according to the invention are explained in greater detail. As shown in FIG. 1, the monitoring device 1 for monitoring the hygienic status of a drinking water installation 2 with at least one water tapping point 3 in its simplest form comprises at least one power supply 4, a sensor 5, a controller 6 and a display 7. The power supply 4, the sensor 5, the controller 6 and the display 7 are each operatively connected to each other.

As an operative connection in the context of the present invention, any connection between at least two elements of the monitoring device 1 is understood to be necessary for the proper functioning of the monitoring device 1. Thus, the active connections between the power supply 4 and the controller 6 and also the operative connection between the sensor 5 and the controller 6 are preferably formed as a wired or conductor-connected electrical connection. The operative connection between the controller 6 and the display 7 can also be designed as a wired or conductor-connected electrical connection (and preferably) as a wireless connection. For a wireless connection, a person skilled in the art will be familiar with the market standard wireless connections, such as e.g. Select WiFi, bluetooth, LAN etc.

The controller 6 is preferably used e.g. at the sensor 5, below the water tap 3, at the corner valve 10 or externally "surface-mounted" or "flush-mounted". Wasserentnahmestellen 3 are any for the purchase of drinking water from the drinking water distribution network or from the drinking water installation 2 suitable fittings and faucets for garden fountains, drinking fountains, sinks, kitchen combinations, showers, bathtubs and the like.

The power supply 4 is preferably as a power supply (eg for connection to an electrical domestic network), as electrical storage (equipped with electric batteries or accumulators), or as a regenerative or alternative power supply (based on light, temperature differences or turbines technology) educated.

According to the invention, the sensor 5 is designed to detect the use of the water extraction point 3 and to output sensor signals 8 to the controller 6. Preferably, it is a sensor 5 for detecting a temperature at the drinking water installation 2 or at the water tapping point 3.

Alternatively to or in combination with the temperature measurement is a sensor 5 for detecting a flow in the drinking water installation 2 or in the water tap 3. The sensor 5 can behind the wall to which the water tap 3 is attached, on a riser, the corner valve 10 or at the inlet to the water tap 3 be made up. Particularly preferably, the sensor 5 is attached to an angle valve 10 (see Fig. 1) for fresh water supply to the water tap 3 or on a line 11 of the drinking water installation 2. A fresh water supply can be configured as a cold water supply 14 or as a hot water supply 15.

The sensor 5 or more sensors 5, 5 may for example be arranged in a wall of the water pipes; Particularly important in sensors for measuring the pH or the electrical conductivity of the water in a cold water or hot water supply 14, 15 that their detection elements are arranged in direct contact with the water. In this case, for example, two detection elements of a sensor 5 may be diametrically opposed with respect to the water pipe, or may also be arranged coaxially one after the other in the flow direction. The skilled expert knows how to arrange such sensors or their detection elements. The sensor 5 or a plurality of sensors 5, 5 can also be arranged on or in a fitting of a water tapping point 3.

The controller 6 is designed to evaluate the sensor signals 8 supplied by the sensor 5 on the basis of predetermined selection criteria.

Exemplary selection criteria are in particular:

A use characterized by: <tb> a) <SEP> A temperature change δT for a certain period of time (e.g., +/- 1 ° C within, for example, 1 minute); <tb> b) <SEP> A water reference of e.g. 0.1 L to 5 L cumulates for a certain period of time (e.g., for 1 to 60 minutes); <tb> c) <SEP> A current flow of e.g. 0.1 liters / second or 6 liters / minute; <tb> d) <SEP> a change in the chlorine content within a certain range (eg +/- 0.1 mg / l within a target free chlorine level of 0.5-5 mg / l according to WHO); <tb> e) <SEP> a change in water parameters such as electrical conductivity (eg + / - 30 μS / cm, ie microsiemens per centimeter), pH (eg +/- pH 0.1 at a setpoint of pH 6-7 ) Etc.

A qualified water change (i.e., a usage corresponding in total to at least the volume of the monitored pipe length) characterized by: <tb> f) <SEP> Below or above a water temperature (e.g., less than 20 ° C or more than 50 ° C). <tb> g) <SEP> Exceeding predetermined supply quantities. <tb> h) <SEP> Reaching the target free chlorine level. <tb> i) <SEP> of a pH, e.g. by 0.1 pH increments

A time window in which at least one use and / or a qualified water change is detected, and the e.g. characterized by: <tb> - t1 <3 days <SEP> → okay <SEP> (display GREEN); <tb> - t2> 3 days and ≤ 7 days <SEP> → observe <SEP> (display YELLOW); <tb> - t3> 7 days <SEP> → possibly critical <SEP> (RED indicator).

A reset characterized by being allowed e.g. to: Pressing a reset button; Turning a key or activating a magnetic switch; Activating a reset function via an external input; Detecting a thermal disinfection, e.g. if the water withdrawal is above 70 ° C for 3 minutes; Reaching a certain temperature (e.g., 55 ° C); Achieving a qualified water change; Acknowledging a sufficient use.

Temperature window for cold water, which are partly country-specific characterized by temperatures: <tb> - TK1of ≤20 ° C <SEP> → OK <SEP> (GREEN indicator); <tb> - TK2> 20 ° C to ≤ 25 ° C <SEP> → observe <SEP> (display YELLOW); <tb> - TK3> 25 ° C <SEP> → possibly critical <SEP> (RED indicator).

Temperature window for hot water, which are partly country-specific characterized by certain temperatures or temperature ranges: <Tb> e.g. European Union (EU): <SEP> <SEP> <tb> - TW1-EU of ≤ 50 ° C <SEP> → possibly critical <SEP> (display RED); <tb> - TW2-EU> 50 ° C to ≤ 55 ° C <SEP> → observe <SEP> (display YELLOW); <tb> -TW3-EU> 55 ° C <SEP> → OK <SEP> (GREEN indicator). <Tb> <September> <September> <Tb> e.g. Netherlands (HL): <SEP> <SEP> <tb> - TW1-NLof ≤ 55 ° C <SEP> → possibly critical <SEP> (display RED); <tb> - TW2-NL> 55 ° C to ≤ 60 ° C <SEP> → observe <SEP> (display YELLOW); <tb> - TW3-NL> 60 ° C <SEP> → OK <SEP> (GREEN indicator).

For the detection of a qualified water change f), the temperature of flowing from the water tap 3 hot water can be measured. The experts, however, disagree on the minimum duration of maintaining a certain maximum temperature when drawing hot water, some settle for simply reaching a temperature of, for example, 55 ° C while the others maintain such a temperature for at least 30 Demand seconds.

The controller 6 is also designed to output from the current use and the selection criteria corresponding status signals 9. The display 7 is preferably designed to display these status signals 9. In addition, the controller 6 can optionally forward the status and other information to external locations such as the building management system, central computer and / or smartphones.

As display 7, optical elements 12 (such as LED or OLED displays), which indicate the current status, are preferably used. It is also possible to use displays (ie LED or OLED arrays). The display 7 may also include acoustic elements 13, such as speakers, beepers, whistles and the like. The display 7 may also include parts of a computer 18 or central computer (screen, printer, etc.).

2 shows a simple variant of a display 7 with a single optical element 12 for the status display when monitoring a cold water extraction point or a hot water extraction point. Preferably, the optical element 12 is designed as RGB LED or RGB OLED, so that with a single optical element, for example, the three colors GREEN, YELLOW and RED can be displayed.

For example, if the temperature is measured and monitored in or on a cold water supply 14, for example, a use a), or a qualified water change f) or a temperature window for cold water in each case with respect to the time windows t1, t2und monitored t3 and the corresponding status are displayed. In this case, for example, a detected use a), a qualified water change f) or the maintenance of a temperature of at most 20 ° C (each in the time window t1) would set the optical element 12 of the display 7 to GREEN (if another status was previously displayed) = Reset) or to GREEN (if the same status was previously displayed). It should be noted that, for safety reasons, the qualified water change f) or the observance of a temperature not exceeding 20 ° C is given a higher significance than proof of use a). For example, only the completion of a qualified water change f) may be detected and monitored so that failure to take place during the time window t1 would set the display to YELLOW and not occur during the time window t2 to RED. Displaying a failure to find a use a) or entering another temperature window (during time slots t1 and t2, respectively) would be indicated accordingly (see above).

Fig. 3 shows an exemplary, improved variant of a display 7 with a plurality of optical elements for the status display in the monitoring of a cold water / hot water extraction point. It is obvious that in this case one side of the display 7 for the cold water supply 14 and the other side of the display 7 for the hot water supply 15 is reserved. For each of these water supplies 14, 15 for a water tap 3, three optical elements 12 are provided, e.g. an RGB LED 12 (T) for the temperature in or at the water supply 14, 15, an RGB LED 12 (N) for the use thereof and an RGB LED 12 (I) for inspection. It is envisaged that, for example, use a) and a qualified water change f) or a temperature window for cold water are each monitored with respect to the time windows t1, t2 and t3 and the corresponding status is displayed. In this case, for example, a use detected (each in the time window t1) would a) set the optical element 12 (N) of the display 7 to GREEN (if another status was previously displayed = reset) or to GREEN (if the same status was previously displayed) has been). In addition, in this case, a qualified water change f (in the time window t1 in each case) or the maintenance of a temperature of at most 20 ° C. would set the optical element 12 of the display 7 to GREEN (if another status was previously displayed = reset) or to GREEN hold (if the same status was previously displayed).

It should be noted that with this improved variant of a display 7 in addition to the occurrence of a use a) and the occurrence of a qualified water change f) or compliance with a maximum or minimum temperature can be displayed. Thus, failure to provide a qualified water change f) or failure to meet a maximum or minimum temperature during the time window t1 will cause the display 12 (T) to be YELLOW although, for example, a usage a) has been detected during this period and the display 12 (N) to GREEN stands.

Again, for example, by not taking a qualified water change f) during the time window t1 the display 12 (T) on YELLOW and by not taking a qualified water change f) during the time window t2 the display 12 (T) is set to RED.

Such on RED spots of the display 12 (T) now triggers the display by the RGB LED 12 (I), so that this e.g. BLUE lights up. An active display 12 (I) means that (even after a qualified water change f has been completed in the meantime) an inspection of the incoming water pipe should be carried out. Such an inspection may mean, for example, that the entire supply water line 14, 15 (thermal and / or chemical) must be disinfected. Only after a completed inspection in accordance with the appropriate part (14, 15) of the display 7 can be reset, for which purpose a special key 19 must be used. This key 19 is preferably in the hands of a person responsible for the inspection and can be designed for example as a beard key, as a magnetic key, as a key with an integrated memory chip, or as any combination of such key types. Resetting with the key deletes the RGB LED 12 (I) and sets the other two RGB LEDs 12 (T) and 12 (N) to GREEN.

By using the three time windows t1; t2und t3ergibt gives a permanent monitoring of the hygienic status of a drinking water installation 2 with at least one water tap 3. The additional use of an inspection function also results in a long-term monitoring with memory function, which recalls a formerly poor status, even if the temperature display and the usage indicator is currently GREEN.

Optionally, the display 7 may comprise further optical elements 12, such as an LED 12 (B) for the state of charge of the battery or the accumulator, an LED 12 (WLAN) for the operating state of a wireless network. As a further option, the display 7 may include a brightness sensor 5, which allows better visibility of the status display (during waking hours) and / or a dimmed luminance of the status display (at bedtime), and which possibly as a further reference source for a detected usage pattern of a water tap can be used.

Although discussed in connection with the discussed Figures 1 to 3 mainly on the use of a) and the qualified water change f) or on the maintenance of a minimum or maximum temperature, the other criteria for use b) to e) or for a qualified water change g) to i) in each case mutatis mutandis.

In addition to the previously discussed, exemplary embodiments of inventive devices for monitoring the hygienic status of a drinking water installation and corresponding, exemplary displays, the present invention comprises the following embodiments of the monitoring method:

version 1

The monitoring device 1 comprises a power supply 4, a control unit 6, one or more sensors 5, 5 (eg temperature, flow, chlorine, conductivity sensor) and one or more status LED 12 for each in the time windows t1, t2, t3 measured hot water temperature and cold water temperature. Optionally, there are also one or more warning lamps (see Fig. 3) for faults, the state of charge of the battery and or inspection (whether there have been critical temperatures and / or stagnation times over a period of, for example, the last 7 days). <tb> A) <SEP> If a qualified water change for cold and / or hot water is detected within the time window t1, then no hygienic critical stagnation should have taken place. The status LED 12 of the display 7 remains GREEN for hot water and / or cold water. <tb> B) <SEP> If a qualified water change for cold and / or hot water is not detected within the time window t2, then a hygienically critical stagnation time could exist. The status LED 12 (T) of the display 7 is YELLOW for hot water and / or cold water. <tb> C) <SEP> If no qualified water change for cold and / or hot water is detected within the time window t3, a hygienically acceptable stagnation time may have been exceeded. The status LED 12 (T) of the display 7 is RED for hot water and / or cold water.

As a reminder: As a measure of a hygienically sufficient water change applies the complete replacement of the water volume in the monitored line section. This is detected, for example, by a temperature, volume, conductance, chlorine concentration or pH measurement. <tb> D) <SEP> If within the time windows t1 to t3, the temperature windows TK1bzw. If the corresponding temperature for used cold water and / or hot water lines is detected, then no hygienically critical temperature should have been present. The status LED 12 (T) of the display 7 remains GREEN for hot water and / or cold water. <tb> E) <SEP> Is within the time windows t1 to t3ein the temperature windows TK2bzw. Tw2 corresponding temperature detected for used cold water and / or hot water lines detected, it could have been a hygienically critical temperature. The status LED 12 (T) of the display 7 is yellow for hot water and / or cold water. <tb> F) <SEP> If the temperature windows TK3bzw within the time windows t1to t3. When the corresponding temperature for used cold water and / or hot water pipes was detected, hygienically critical temperatures were reached. The status LED 12 (T) of the display 7 is RED for hot water and / or cold water. <tb> G) <SEP> By means of an automatic or manually induced qualified water change, all, ie at least the four LEDs 12 (T) and 12 (N) (at least one each for cold water temperature, one for cold water use, one for hot water temperature, one for hot water use) in each case with hygienically sufficient water change and reaching the target temperatures individually reset to GREEN. If one of the parameters is not reached, the associated LED 12 remains at the previous color. <tb> H) <SEP> A warning lamp (refer to RGB LED 12 (I) in Fig. 3) indicates, even if the LEDs 12 (N) (T) are reset, all or in the parameters that it is in the Past violations in the form of a red LED 12 o-another warning lamp. This alert may be electronically or by a special tool such as a be queried with a magnetic key 19 and or reset. The warning lamp RGB LED 12 (I) may e.g. Optionally, by a number of flashing cycles of the display RGB LED 12 (I) represent the number of transgressions of the respective measuring unit.

Variant 2

The monitoring device 1 comprises a power supply 4, a control unit 6, a temperature sensor 5 and a status LED 12 (see Fig. 2). During commissioning, the time window t1 is started. <tb> A) <SEP> If within the time window t1 a use and / or a qualified water change is detected, then no stagnation should take place; the time window t1 is reset. The status LED 12 of the display 7 remains off. <tb> B) <SEP> If no use and / or qualified water change is detected within the time window t1, there is a risk of stagnation. The status LED 12 of the display 7 flashes in an interval and thus indicates that a use and / or water change has to be made. <tb> C) <SEP> After the time window t1 has elapsed, the time window t2 starts. If use and / or a qualified water change are detected within the time window t2, the time windows t1 and t2 are reset and the time window t1 is restarted. At the same time, the status LED 12 of the display 7 goes out. If there is still no use and / or no qualified water change within the time window t2, the display lights up permanently to indicate that a stagnation of the water could have taken place. After the time window t2 has elapsed, the hygiene sensor must be reset according to the «Reset» criteria. The time windows t1 and t2 and the display are reset and the time window t1new is started.

Variant 3

The hygiene monitor comprises a power supply 4, a control unit 6, a temperature sensor 5 and a display 7 with the optical elements 12 (LEDs) GREEN, YELLOW, RED. The display may consist of three individual optical elements 12 GREEN, YELLOW, RED (see Fig. 1), or of two optical elements 12 GREEN, RED and resulting mixed color or a single RGB element 12. During commissioning, the at least one optical element 12 lights up in red and the time window t1 is started. <tb> A) <SEP> If use and / or a qualified water change is detected within a time window t1, the time window t1 is reset. There should be no stagnation; the at least one optical element 12 of the display 7 lights up in green color. <tb> B) <SEP> After the time t1 has elapsed, there is a risk of stagnation. The time window t2 is started. The at least one optical element 12 of the display 7 changes from GREEN to YELLOW and thus indicates that a use and / or water change has to take place. If use and / or a qualified water change are detected within the time window t2, the time windows t1 and t2 are reset and the time window t1 is restarted. At the same time the display 7 changes again from YELLOW to GREEN. <tb> C) <SEP> If within the time window t2 there is still no use and / or a qualified water change, the display will change from YELLOW to RED to indicate that stagnation may have occurred. After expiration of the time window t2, the monitoring device 1 must be reset in accordance with the criteria "Reset". The time windows t1 and t2 and the display 7 are reset and the time window t1new is started.

Variant 4

The embodiment is carried out as in variant 3, but with the difference that the display 7 includes a plurality of optical elements 12 such as. 3 green LED bars, 4 yellow LED bars and 3 red LED bars.

Thanks to this embodiment 4 can be seen how long the monitoring device 1 is already in the appropriate status. <tb> A) <SEP> If the time window t1 lasts 3 days for example, then another green LED is switched on every full day. <tb> B) <SEP> If the time window t2 takes 4 days, for example, another yellow LED is switched on per day. <tb> C) <SEP> If the time window t3 takes 8 days, for example, another red LED will be activated per day. The number of red LEDs indicates how long the monitor has been in this state. It is possible in this embodiment that when switching to the next state, all previously switched to LEDs remain lit.

Variant 5

The execution takes place as in variant 4, but with a peak detector function. With this peak detector function, the respectively highest achieved display stops. Thus, the "worst case" case is displayed until reset.

Variant 6

The execution takes place as in the variants 1 to 5, however, the display 7 is only displayed by conscious activation for a certain time. Thus, disturbing lighting (e.g., in a hospital room) can be prevented. Furthermore, in this embodiment, electrical power is saved, which allows a regenerative power supply or battery operation.

Variant 7

The execution takes place as in the variants 1 to 5, but the display 7 is displayed only from a certain room brightness. Thus, a disturbing light at night or in dark rooms can be prevented. Furthermore, in this embodiment, electrical power is saved, which allows a regenerative power supply or battery operation.

Variant 8

The execution takes place as in the variants 1 to 7, however, the status display 7 is optical, acoustic, wired or wireless, e.g. to a building management system (to a computer 18 or central computer, see Fig. 1) and / or e.g. transferred to at least one smartphone.

Variant 9

The execution takes place as in the variants 1 to 8, however, a data logger module 16 is used, which is connected to the monitoring device 1 or integrated therein, and which the status and sensor behavior, ie the status signals 9 with respect recorded on special events and / or a specific timeline (eg, 1-60 minutes, 1-24 hours, 1-3 days, 1-4 days).

Variant 10

The execution takes place as in the variants 1 to 9, however, to the first sensor 5 (which is designed as a temperature sensor), a second sensor 5V is used in the form of a Duchflussmessers. Alternatively, the flow meter is used in place of the temperature sensor 5.

Variant 11

The execution takes place as in the variants 1 to 10, however, in addition to the first sensor 5 (which is designed as a temperature sensor), a second sensor 5 (which is also designed as a temperature sensor) is used. With this embodiment of a monitoring device 1, wherein the controller 6 comprises two sensors 5, 5, the temperature for the cold water supply or the cold water inlet and also for the hot water supply or the hot water inlet can be monitored.

Variant 12

The execution takes place as in the variants 1 to 11, but the display 7 of the monitoring device 1 comprises two display units, of which a first display unit the status of use and a second display unit the status of the water change indicates or represents.

Variant 13

The embodiment is carried out as in the variant 12, but the display 7 of the monitoring device 1 comprises three display units, of which a third display unit, the achievement of certain water temperatures (eg less than 20 ° C or more as 50 ° C) indicates.

It is clear to those skilled in the art that colors other than GREEN, YELLOW, and RED could be used for the status display, but this color selection is preferred. Like reference numerals indicate corresponding elements, even if not explicitly referred to in the description in each case.

Reference numerals:

[0052] <Tb> 1 <September> monitoring device <Tb> 2 <September> drinking water installation <Tb> 3 <September> Tap <Tb> 4 <September> Power <tb> 5 <SEP> first sensor <tb> 5A <SEP> second sensor <tb> 5 <SEP> Brightness sensor <tb> 6 <SEP> Control, Control Unit <Tb> 7 <September> Display <Tb> 8 <September> sensor signals <Tb> 9 <September> Status signals <Tb> 10 <September> Eckventil <Tb> 11 <September> Line <tb> 12 <SEP> optical elements <tb> 12 (B) <SEP> Battery indicator <tb> 12 (I) <SEP> Display inspection <tb> 12 (N) <SEP> Display usage <tb> 12 (T) <SEP> Display temperature <tb> 12 (Wi-Fi) <SEP> Wireless network display <tb> 13 <SEP> acoustic elements <Tb> 14 <September> cold water supply <Tb> 15 <September> Hot water supply <Tb> 16 <September> Data logger module <Tb> 17 <September> Connection Module <tb> 18 <SEP> Calculator, central computer <Tb> 19 <September> key

Claims (21)

1. Device (1) for monitoring the hygienic status of a drinking water installation (2) with at least one water tapping point (3), this monitoring device (1) having at least one power supply (4), a sensor (5), a controller ( 6) and a display (7), which are in each case operatively connected to each other, characterized in that the sensor (5) for detecting at least one use of the water extraction point (3) and for outputting sensor signals (8) to the controller (6) wherein the controller (6) is designed for evaluating these sensor signals (8) on the basis of predetermined selection criteria and for outputting status signals (9) corresponding to the current usage and the selection criteria. 2. monitoring device (1) according to claim 1, characterized in that the sensor (5) for detecting at least one qualified water change at the water tap (3) and for dispensing sensor signals (8) to the controller (6) is formed, wherein the controller (6) is designed for evaluating these sensor signals (8) on the basis of predetermined selection criteria and for outputting status signals (9) corresponding to the qualified water change and the selection criteria. 3. Monitoring device (1) according to claim 1 or 2, characterized in that the controller (6) for outputting status signals (9) to the display (7) is formed, wherein the display (7) for displaying these status signals ( 9) is formed. 4. Monitoring device (1) according to one of the preceding claims, characterized in that the sensor (5) for detecting a temperature, and / or a flow, and / or a chlorine content, and / or an electrical conductivity, and / or a pH at or in the drinking water installation (2) or at or in the water tapping point (3) is formed. 5. Monitoring device (1) according to one of the preceding claims, characterized in that the sensor (5) is attached to an angle valve (10) or to or in a conduit (11) of the drinking water installation (2). 6. Monitoring device (1) according to one of the preceding claims, characterized in that the power supply (4) is designed as a power supply, as an electrical storage, or as a regenerative power supply. 7. Monitoring device (1) according to one of the preceding claims, characterized in that the display (7) comprises optical elements (12) and / or acoustic elements (13). 8. Monitoring device (1) according to claim 7, characterized in that the optical elements (12) of the display (7) are selected from a group comprising one or more LEDs or OLEDs, which individually or in an array as a display are arranged. 9. monitoring device (1) one of the preceding claims, characterized in that the controller (6) and the display (7) are wired or wirelessly operatively connected to each other. 10. Monitoring device (1) one of the preceding claims, characterized in that the controller (6) comprises two sensors (5, 5), wherein a first sensor (5) of a cold water supply (14) of the drinking water installation (2 ) and a second sensor (5) is associated with a hot water supply (15) of the drinking water installation (2). 11. Monitoring device (1) one of the preceding claims, characterized in that the controller (6) comprises a data logger module (16) which is integrated in the controller (6) or formed with the controller (6) connectable, and which is designed for recording status signals (9) as well as for the wired or wireless readout of the recorded status signals (9). 12. monitoring device (1) one of the preceding claims, characterized in that the controller (6) comprises a connection module (17) which is integrated in the controller (6) or formed connectable to the controller (6), and which is adapted for wired or wireless digital communication with a computer (18). 13. A method for monitoring the hygienic status of a drinking water installation (2) with at least one water tapping point (3), wherein a monitoring device (1) is used which has a power supply (4), a sensor (5), a controller ( 6) and a display (7), which are in each case operatively connected to each other, characterized in that with the sensor (5) uses of the water sampling point (3) detected and corresponding sensor signals (8) are delivered to the controller (6), and with the controller (6) these sensor signals (8) evaluated based on predetermined selection criteria of the current use and the selection criteria corresponding status signals (9) are issued. 14. Monitoring method according to claim 13, characterized in that with the sensor (5) qualified water change at the water outlet (3) detected and corresponding sensor signals (8) are delivered to the controller (6), and that with the controller (6 ) these sensor signals (8) evaluated on the basis of predetermined selection criteria and the current qualified water change and the selection criteria corresponding status signals (9) are delivered. 15. Monitoring method according to claim 13 or 14, characterized in that with the controller (6) these sensor signals (8) are delivered to the display (7), and that with the display (7) these status signals (9) are displayed , 16. Monitoring method according to one of claims 13 to 15, characterized in that with the sensor (5) temperatures and / or flows, and / or a chlorine content, and / or an electrical conductivity, and / or a pH be detected on or in the drinking water installation (2) or at or in the water outlet (3). 17. Monitoring method according to one of claims 13 to 16, characterized in that the display (7), the status signals (9) are displayed visually and / or acoustically. 18. Monitoring method according to one of claims 13 to 17, characterized in that a certain status signal (9) remains until a reset of the display (7). 19. Monitoring method according to one of claims 13 to 17, characterized in that an inspection signal (12 (I)) remains even after a reset of the display (7). 20. Monitoring method according to one of claims 13 to 19, characterized in that the status signals (9) or inspection signals (12 (I)) are recorded by a data logger module (16) and / or by a computer (18) , 21. Monitoring method according to one of claims 13 to 20, characterized in that the display (7) is activated externally and persists for a certain time.