WO2015197255A1

WO2015197255A1 - Device and a method for monitoring the hygiene status of a drinking water installation

Info

Publication number: WO2015197255A1
Application number: PCT/EP2015/060383
Authority: WO
Inventors: Peter Arens; Tobias KLOSTA; Roland Obrist
Original assignee: Oblamatik Ag
Priority date: 2014-06-26
Filing date: 2015-05-11
Publication date: 2015-12-30
Also published as: CH709814A2; CH709814B1

Abstract

A device (1) or a method for monitoring the hygiene status of a drinking water installation (2) having at least one water removal 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 one another. The sensor (5) is designed for detecting the usage or a qualified change of water carried out at the water removal point (3) and for emitting 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 usage or the qualified change of water and the selection criteria.

Description

Device and a method for

Monitoring the hygienic status of a drinking water installation

Applies to a device and method for monitoring the hygienic status of a drinking water installation with at least one water tap. 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, among other things, via sampling valves from the drinking water installation in the building or at the drinking water heater, with the vast majority of withdrawals via sanitary fittings taking place 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 sites 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 made. The usual number of samples at the same time therefore only gives an incomplete picture of the hygienic status of a drinking water installation. Thus, high numbers of bacteria at individual sampling points usually lead to a large expansion of 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 type of building, water temperatures of 50 ° C to 65 ° C, for example, are considered to be an effective remedy 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 dangerously endanger the entire installation, one would be

Early detection also by lay people or normal operating staff particularly important to minimize the high number of water-borne illnesses in the health sector and beyond also 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 laypersons without special technical training or normal operating personnel using 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:

1. In the simplest case, by means of a single sensor, the hygienic status of the water tap of a drinking water installation can be recorded on the basis of physical parameters such as frequency of use, duration of use, amount of use and / or course of the water temperature and simply displayed. 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.

2. The physical parameters such. Temperature, water change, duration of water change, e.g. via optical signals or the display of values directly at the point of use 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 into a calendar in a decentralized or centralized manner.

3. The simplicity of the device according to the invention makes it possible for all withdrawal points a drinking water installation, and on demand at selected points in distribution and risers, depending to provide a cost-effective device that easy detection, evaluation and visualization of the user behavior and hygienic required temperature collective allows. This allows a user to directly control potential vulnerabilities in a drinking water installation or inadequate use (eg during a walk-through or centrally via a building automation system or a central computer) and, if necessary, provide technical countermeasures in the short term before hygienic risks occur.

The hygiene sensor and the documentation module can also be used separately or jointly 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 temperature control "cold" and "warm". In the following, the monitoring device according to the invention or the monitoring method according to the invention will be explained in more detail on the basis of schematic drawings which do not limit the scope of the present invention and represent only exemplary embodiments. Showing:

Figure 1 is a schematic view of a device for monitoring the hygienic status of a drinking water installation.

2 shows a simple variant of a display with a single optical element for the status display when monitoring a cold water removal point or a hot water removal point; 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 consequence, the monitoring device according to the invention and the monitoring method according to the invention will be explained in more 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 Power supply 4, the sensor 5, the controller 6 and the display 7 are each operatively connected to each other. An operative connection in the sense of the present invention is understood to be any connection between at least two elements of the monitoring device 1 which are necessary for the proper functioning of the monitoring device 1. So are the active connections between the power supply 4 and the

Control 6 and also the operative connection between the sensor 5 and the controller 6 preferably designed 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 made e.g. on the sensor 5, under the water tap 3, on 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 designed as a power supply (for example for connection to a domestic electrical network), as an electrical storage (equipped with electric batteries or accumulators), or as a regenerative or alternative power supply (with technology based on light, temperature differences or turbines).

According to the invention, the sensor 5 is designed to detect the use of the water extraction point 3 and to emit 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 o- in the water tap 3. The sensor 5 can behind the wall to which the water tap 3 is attached to a riser, at the corner valve 10 or at the inlet to the water tap 3 are turned. 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 ^λ can also be arranged, for example, 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 more sensors 5.5 ^λ kön- NEN or to be arranged in a fitting of a water intake 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 that is characterized by:

a) A temperature change δΤ during a certain period of time (e.g.

+/- 1 ° C within z. 1 minute);

b) a water of z. 0.1 I to 5 I cumulated for a certain period of time (eg, for 1 to 60 minutes);

c) a current flow of z. 0.1 liters / second or 6 liters / minute; d) 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); e) a change of water parameters such as electrical conductivity (eg +/- 30 pS / cm, ie microsiemens per centimeter), pH value (eg +/- pH 0.1 at a target value of pH 6-7) etc.

A qualified water change (that is to say a use which in sum corresponds to at least the volume of the monitored pipeline length), which is characterized by:

f) Falling below or exceeding a water temperature (e.g., less than 20 ° C or more than 50 ° C).

g) Exceeding predetermined reference quantities.

h) Reaching the target free chlorine level.

i) a pH z. B. by 0.1 pH levels

A time window in which at least one use and / or a qualified water change is detected, and the z. B. characterized by:

- ti <3 days okay (display GREEN); observe t ₂ > 3 days and <7 days (display YELLOW); t3> 7 days possibly critical (indicator RED).

A reset, which is characterized by or is allowed z. For example:

- pressing a reset button;

Turning a key or activating a magnetic switch;

Activating a reset function via an external input;

Detecting a thermal disinfection, z. For example, if the removal of water is above 70 ° C for 3 minutes;

- reaching a certain temperature (eg 55 ° C);

Achieving a qualified water change;

Acknowledging a sufficient use.

Temperature windows for cold water, which are partly country-specific characterized by temperatures:

- Τκι of <20 ° C in order (display GREEN);

- observe T _K2 > 20 ° C to <25 ° C (display YELLOW);

T _K 3> 25 ° C may be critical (RED indicator). Temperature window for hot water, which are partly country-specific characterized by certain temperatures or temperature ranges: z. B. European Union (ELP:

- TWI-EU of <50 ° C may be critical (RED indicator);

- observe TW2-EU> 50 ° C to <55 ° C (display YELLOW);

TW3-EU> 55 ° C In order (display GREEN). e.g. Netherlands (NL):

TWI-NL of <55 ° C may be critical (RED indicator);

- observe TW2-NL> 55 ° C to <60 ° C (display YELLOW);

- TWS-NL> 60 ° C In order (Display GREEN)

To prove a qualified water change f), the temperature of the hot water flowing out of the water tap 3 can be measured. However, the experts disagree on the minimum duration of maintaining a certain maximum temperature when drawing hot water, some are satisfied with simply reaching a temperature of, for example, 55 ° C while the others maintain such a temperature during require at least 30 seconds.

The controller 6 is also designed for outputting status signals 9 corresponding to the current usage and the selection criteria. 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.

The display 7 is preferably made of optical elements 12 (such as LED or OLED displays) which indicate the current status. 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.). FIG. 2 shows a simple variant of a display 7 with a single optical element 12 for the status display when monitoring a cold water removal point or a hot water removal 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.

If, for example, the temperature in or at a cold water supply 14 is measured and monitored, then, for example, use a) or a qualified water change f) or a temperature window for cold water can be monitored with respect to the time windows ti, t ₂ and 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 ti) 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 locate it during the time window ti would render the display to YELLOW and not occur during the time window t ₂ to RED. Displaying a failure to find a use a) or entering another temperature window (during time slots ti and t ₂ , 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 when monitoring 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, for. B. an RGB LED 12 (T) for the temperature in or at the water supply 14,15, a RGB LED 12 (N) for the use of the same and an RGB LED 12 (I) for the inspection. It is envisaged that, for example, a use a) and a qualified water change f) or a temperature window for cold water respectively monitored with respect to the time windows ti, t ₂ and t3 and the corresponding status is displayed. In this case, for example, a use (detected in the time window ti) would a) set the optical element 12 (N) of the display 7 to GREEN (if another status was previously displayed = reset) or keep it GREEN (if previously the same status was displayed). In addition, in this case, a qualified water change f (in each case in the time window t) 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) the occurrence of a qualified water change f) or the maintenance of a maximum or minimum temperature can be displayed. Thus, failure to provide a qualified water change f) or failure to maintain a maximum or minimum temperature during the time window ti will cause the display 12 (T) to be YELLOW although, for example, use a) was detected during this period and the display 12 (N) GREEN stands.

Again, for example, by not taking a qualified water change f) during the time window ti the display 12 (T) on YELLOW and by not taking a qualified water change f) during the time window t _2, the display 12 (T) is set to RED.

Such a RED on the display 12 (T) now triggers the display by the RGB LED 12 (I), so this z. B. 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) are disinfected got to. 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. Through the use of the three time windows ti, t ₂ and t3 results in 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 reminds you of a previously inadequate status, even if the temperature display and the usage indicator are 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 comprise a brightness sensor 5 ", which allows better visibility of the status display (during waking times) and / or a dimmed luminance of the status display (at bedtime), and which may be used as a further reference source for a detected usage pattern of a water collection point can be.

Although in connection with the discussed Figures 1 to 3 mainly on the use of a) and on the qualified water change f) or on the maintenance of a minimum or maximum temperature was discussed, 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 ^λ (eg, temperature, flow, chlorine, conductivity sensor) and one or more status LEDs 12 for the in the time windows ti, t ₂ , 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 it has given in a period of eg the last 7 days critical temperatures and / or stagnation times) available.

A) If a qualified water change for cold and / or hot water is detected within the time window ti, 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.

B) If no qualified water change for cold and / or hot water is detected within the time window t ₂ , then a hygienically critical stagnation time could be present. The status LED 12 (T) of the display 7 is YELLOW for hot water and / or cold water.

C) 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, a measure for a hygienically sufficient water change is the complete replacement of the water volume in the monitored line section. This is detected, for example, by a temperature, volume, conductivity, chlorine concentration or pH value measurement. D) If within the time windows ti to 13 a temperature corresponding to the temperature windows T _K i or T _W 3 is detected for used cold water and / or hot water lines, 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.

E) Is within the time window ti to t 3 a temperature windows T _K2 or

T _w2 corresponding _detected temperature for used cold water and / or hot water lines, it could have been a hygienic critical temperature. The status LED 12 (T) of the display 7 is yellow for hot water and / or cold water.

If a temperature corresponding to the temperature windows T _K 3 or Twi for used cold water and / or hot water lines is detected within the time windows t 1 to t 3, then hygienically critical temperatures have been reached. The status LED 12 (T) of the display 7 is RED for hot water and / or cold water. G) 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) are each rendered hygienic 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.

H) A warning lamp (see RGB LED 12 (I) in Fig. 3) indicates even when resetting the LEDs 12 (N) (T) flat or for each of the parameters, that in the past exceeded in the form of a red Lamp LED 12 0- which has given another warning. This warning can be electronically 0- by a special tool such. B. queried with a magnetic key 19 and or reset. The warning lamp RGB LED 12 (I) can z. B. optionally represent by a number of flashing cycles of the display RGB LED 12 (I) 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 ti is started.

A) If a use and / or a qualified water change is detected within the time window ti, then no stagnation should take place; the time window ti is reset. The status LED 12 of the display 7 remains off. B) If no use and / or qualified water change is detected within the time window ti, 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. C) After the time window ti has elapsed, the time window t ₂ starts. If a use and / or a qualified water change is detected within the time window t ₂ , the time windows ti and t _{2 are} reset and the time window ti is restarted. At the same time, the status LED 12 of the display 7 goes out. If, within the time window t _2, there is still no use and / or no qualified water change, the display lights up permanently to point out that now a stagnation of the water could have taken place.

After the time window t ₂ has elapsed, the hygiene sensor must be reset in accordance with the criteria "Reset." The time windows ti and t ₂ and the display are reset and the time window ti is restarted.

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 shines in red and the time window ti is started.

A) If a use and / or a qualified water change is detected within a time window ti, the time window ti is reset. There should be no stagnation; the at least one optical element 12 of the display 7 lights up in green color.

B) After the time ti has elapsed, there is a risk of stagnation. The time window t _{2 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.

Is within the time window t ₂ a use and / or a qualified

Water change detected, the time windows ti and t _{2 are} reset and the time window ti is restarted. At the same time the display 7 changes again from YELLOW to GREEN.

If there is still no usage and / or a qualified water change within time slot t ₂ , the display will change from YELLOW to RED to indicate that stagnation may have occurred.

After expiry of the time window t ₂ , the monitoring device 1 must be reset in accordance with the criteria "reset." The time windows ti and t ₂ and the display 7 are reset and the time window ti is restarted.

Variant 4

The execution is carried out as in variant 3, but with the difference that the display 7 includes a plurality of optical elements 12 such. 3 green LED bars, 4 yellow LED bars and 3 red LED bars. Thanks to this embodiment variant 4 can be seen how long the monitoring device 1 is already in the appropriate status.

A) If the time window ti takes, for example, 3 days, then another green LED is switched on for each full day.

B) If the time window t _{2 takes} 4 days, for example, then another yellow LED is switched on per day. C) If the time window t3 takes 8 days, for example, another red LED will be switched on 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, however, 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 z. B. transmitted to at least one smartphone.

Variant 9

The execution takes place as in 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 to records specific 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 5 ^{λ 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 ^λ (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 ^λ , 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 indicates the status of use and a second display unit indicates the status of the water change or represents. Variant 13

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

It will be understood by 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:

1 monitoring device

2 drinking water installation

3 water intake point

4 power supply

5 first sensor

5 ^λ second sensor

5 "brightness sensor

6 control, control unit

7 display

8 sensor signals

9 status signals

10 angle valve

11 line

12 optical elements

12 (B) Battery indicator

12 (1) Display inspection

12 (N) display usage

12 (T) Display temperature

12 (WLAN) Wireless network indicator

13 acoustic elements

14 cold water supply Hot water supply datalogger module connection module calculator, central computer key

Claims

Device (1) for monitoring the hygienic status of a drinking water installation

(2) with at least one water intake point

(3), this monitoring device (1) having at least one power supply

(4), a sensor (5), a controller (6) and a display (7), each of which is operatively connected to one another, characterized in that the sensor (5) is used for detecting at least one use of the water extraction point (3) and for Emitting sensor signals (8) to the controller (6) is designed, the controller (6) being designed to evaluate these sensor signals (8) based on predetermined selection criteria and to output status signals (9) corresponding to the current usage and the selection criteria.

Monitoring device (1) according to claim 1, characterized in that the sensor (5) is designed to detect at least one qualified water change at the water withdrawal point (3) and to emit sensor signals (8) to the controller (6), the Control (6) is designed to evaluate these sensor signals (8) based on predetermined selection criteria and to output status signals (9) corresponding to the qualified water change and the selection criteria.

Monitoring device (1) according to claim 1 or 2, characterized in that the controller (6) is designed to output status signals (9) to the display (7), the display (7) being designed to display these status signals (9). is trained.

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 -Value is formed on or in the drinking water installation (2) or on or in the water withdrawal point (3).

5. Monitoring device (1) according to one of the preceding claims, characterized in that the sensor (5) is attached to a corner valve (10) or on or in a line (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 device, 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 that includes one or more LEDs or OLEDs, which can be used individually or in an array are arranged as a display.

9. Monitoring device (1) according to one of the preceding claims,

characterized in that the control (6) and the display (7) are operatively connected to one another in a wired or wireless manner.

10. Monitoring device (1) according to one of the preceding claims,

characterized in that the control (6) comprises two sensors (5.5 ^λ ), a first sensor (5) of a cold water supply (14) of the drinking water installation (2) and a second sensor (5 ^λ ) of a hot water supply

(15) is assigned to the drinking water installation (2).

11. Monitoring device (1) according to one of the preceding claims,

characterized in that the control (6) is a data logger module

(16), which is integrated into the controller (6) or designed to be connectable to the controller (6), and which is designed to record status signals (9) and to read out the recorded status signals (9) by wire or wirelessly.

12. Monitoring device (1) according to one of the preceding claims, characterized in that the control (6) comprises a connection module (17) which is integrated into the control (6) or is designed to be connectable to the control (6), and which is designed for wired or wireless digital communication with a computer (18).

13. Method for monitoring the hygienic status of a drinking water installation (2) with at least one water extraction point (3), using a monitoring device (1) which has a power supply (4), a sensor (5), a controller ( 6) and a display (7), each of which is operatively connected to one another, characterized in that the sensor (5) detects usage of the water extraction point (3) and corresponding sensor signals (8) are sent to the controller (6), and that With the controller (6), these sensor signals (8) are evaluated based on predetermined selection criteria, the current usage and status signals (9) corresponding to the selection criteria are emitted.

14. Monitoring method according to claim 13, characterized in that qualified water changes at the water withdrawal point (3) are detected with the sensor (5) and corresponding sensor signals (8) are sent to the control (6), and that with the control (6 ) these sensor signals (8) are evaluated based on predetermined selection criteria and status signals (9) corresponding to the current qualified water change and the selection criteria are issued.

15. Monitoring method according to claim 13 or 14, characterized in that these sensor signals (8) are sent to the display (7) with the control (6), and that these status signals (9) are displayed with the display (7). .

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 value can be detected on or in the drinking water installation (2) or on or in the water withdrawal point (3).

17. Monitoring method according to one of claims 13 to 16, characterized in that the status signals (9) are displayed optically and / or acoustically with the display (7).

18. Monitoring method according to one of claims 13 to 17, characterized in that a specific status signal (9) remains until the display (7) is reset.

19. Monitoring method according to one of claims 13 to 17, characterized in that an inspection signal (12 (I)) remains even after the display (7) has been reset.

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 remains active for a certain time.