WO2022117461A1 - Hygienespülsystem - Google Patents
Hygienespülsystem Download PDFInfo
- Publication number
- WO2022117461A1 WO2022117461A1 PCT/EP2021/083185 EP2021083185W WO2022117461A1 WO 2022117461 A1 WO2022117461 A1 WO 2022117461A1 EP 2021083185 W EP2021083185 W EP 2021083185W WO 2022117461 A1 WO2022117461 A1 WO 2022117461A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- flushing
- water
- dts
- threshold value
- Prior art date
Links
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 129
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 238000000034 method Methods 0.000 claims abstract description 96
- 230000001960 triggered effect Effects 0.000 claims description 12
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000013505 freshwater Substances 0.000 description 10
- 238000010079 rubber tapping Methods 0.000 description 5
- 230000002000 scavenging effect Effects 0.000 description 4
- 238000011109 contamination Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000031018 biological processes and functions Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B1/00—Methods or layout of installations for water supply
- E03B1/04—Methods or layout of installations for water supply for domestic or like local supply
- E03B1/048—Systems for collecting not used fresh water
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/08—Arrangement of draining devices, e.g. manual shut-off valves
Definitions
- the present invention relates to a sanitary flushing system according to claim 1 and a method for a sanitary flushing system according to claim 12.
- a key objective of hygiene flushing systems is to replace all of the water, i.e. the entire volume of the pipe, during a hygiene flush.
- the flushing process has been extended for longer, which leads to an unnecessary loss of water.
- EP 2 500 475 a temperature-controlled flushing is proposed, the flushing being continued until a substantially constant water temperature is measured.
- the problem with this method is that the criterion of a constant water temperature due to temperature fluctuations in the fresh water for the Determination of the replacement of the tube content is very unreliable. In this respect, the method according to EP 2 500 475 results in unreliable flushing.
- the object of the invention is to specify a sanitary flushing system which overcomes the disadvantages of the prior art.
- a hygiene flushing system comprises a water line in which water is guided in a flow direction, a flushing fitting that can be controlled to flush the water line, a control unit for controlling the flushing fitting, a first temperature sensor for measuring a first water temperature T1 and a second temperature sensor for measuring a second water temperature T2.
- the second temperature sensor is preferably arranged after the first temperature sensor, viewed in the flow direction of the water. The measured values of the measured temperatures can be transmitted from the temperature sensors to the control unit.
- a temperature difference dT between the first water temperature T1 and the second water temperature T2 is determined by the control unit.
- the flush valve is closed when the temperature difference dT reaches a threshold value dTS.
- a simple and safe rinsing system can be created.
- the temperature measurement shows that the temperature or water temperature between the two measuring points in the pipeline is equal, which indicates a complete flushing water exchange.
- the monitoring of the water temperature also has the advantage that a well-functioning flushing system can be provided with inexpensive elements.
- the use of cost-intensive sensors, such as flow sensors, etc. is no longer necessary.
- a further advantage results from the fact that the measured values of the measured temperatures can also be evaluated in another way. For example, to evaluate the water quality.
- a further advantage lies in the fact that existing buildings can very easily be retrofitted with a hygienic flushing system according to the invention. By measuring the differential temperatures, it is also not necessary to know the exact volume or length of the pipe, which means that the system can also be very easily retrofitted to existing buildings, where the routing of the pipe is usually unknown.
- dT T1 - T2
- the two temperatures T1 and T2 are preferably continuously or continuously measured during a rinsing process.
- the two temperatures are preferably measured at the same time.
- the temperature difference dT is preferably also continuously calculated during a rinsing process.
- the comparison between the temperature difference dT and the threshold value dTS also takes place continuously.
- the two temperatures T1 and T2 can be measured, the temperature difference dT to be calculated and the temperature difference dT and the threshold value dTS to be compared periodically at predetermined time intervals.
- the time intervals can be a few seconds.
- the selection of the level of the threshold essentially determines the duration of the flushing process. If the threshold value is low, the first temperature is very close to the second temperature, which means that the water in the water pipe has essentially the same temperature, so that it can be assumed with great certainty that the water pipe has been completely flushed out. At a high threshold, the temperature difference between the first temperature and the second temperature is greater, in which case it can no longer be said with absolute certainty that the water pipe has been completely flushed out.
- the choice of threshold is critical to the level of flushing of the liquid line. An optimal threshold has the advantage that the water line has been completely flushed and that too much fresh water is not wasted. The height of the threshold essentially depends on the boundary conditions with regard to the temperatures.
- the threshold value depends on the temperature relationships between the ambient temperature and the water temperature. With a cold water pipe and a room temperature of 22°C, the threshold value can be in the range from 0 to 10 Kelvin, in particular from 0 to 5 Kelvin. In the case of a hot water pipe, however, the threshold value can also be higher than 10 Kelvin.
- the temperature in the water pipe takes on the ambient temperature after a certain period of time if it stagnates.
- the second temperature T2 is essentially the ambient temperature.
- the flushing valve Before the flushing process, the flushing valve is closed. To trigger the flushing process, the flushing valve is opened and the water in the water line flows away through the flushing valve, while fresh water flows into the water line via the line inlet.
- the threshold value dTS is preferably calculated during the scavenging process as a function of the measured first temperature T1 and/or as a function of the measured second temperature T2 at the start of the scavenging process.
- the expression "at the beginning of the flushing process" is to be understood in such a way that the second temperature T2 was measured at the point in time at which the flushing fitting was opened; or that the temperature T2 is measured in a narrow time window of a maximum of 20 seconds after opening the flush valve.
- the time window can also be smaller. For example, a maximum of 15 seconds or a maximum of 10 seconds.
- the second temperature, which is measured at the start of the flushing process and is then used to calculate the threshold value dTS is referred to as T2_t0.
- the threshold value dTS is calculated continuously or at fixed time intervals by the control unit during the flushing process.
- a continuous calculation means that the threshold value is continuously determined.
- a calculation at fixed time intervals means that the threshold value is calculated periodically. For example, at intervals of 5 seconds between the individual calculations.
- the comparison described above between the temperature difference and the threshold value takes place with the calculated threshold value dTS.
- the comparison between the temperature difference dT and the threshold value dTS can also take place continuously or at fixed time intervals.
- the threshold value dTS is particularly preferably formed as a differential value between the first water temperature T1 and the second water temperature T2_t0 at the beginning of the flushing process and by multiplying the differential value by a quotient Q.
- this means: dTS (T1 - T2_t0) * Q
- the quotient can be set at 0.25.
- the threshold value dTS then results as follows:
- the use of the quotient Q is particularly advantageous because a threshold value can be determined at which optimal flushing is achieved in relation to the flushed volume. This means that an optimal volume flushing is achieved at which the volume to be flushed is flushed out, but not too much water is wasted.
- the selection of the size of the quotient Q is essentially dependent on the circumstances of the pipe system, in particular the length and diameter, or the pipe material and pipe wall thickness. Due to the flow profile of the water in the pipe, if the flow in the pipe is turbulent, twice the pipe content has to be exchanged in order to exchange all the water, which can also affect the quotient Q. The lower the quotient Q, the greater the exchange volume and vice versa.
- the quotient Q is preferably greater than 0.
- the quotient Q is between 0.1 and 1, in particular between 0.15 and 0.5, particularly preferably 0.25. These ranges have proven to be advantageous for the usual diameters in the range from 15 to 40 millimeters and pipe lengths in the range from 10 to 50 meters.
- dTS (T1 - T3) * Q
- the first temperature drops very quickly because fresh water flows into the pipe.
- the second temperature drops slowly because the water in the pipe, which is warmer than the fresh water, flows through it.
- the first temperature sensor is preferably arranged in the area of a line inlet of the water line.
- the hygiene flushing system also includes at least one tap fitting connected to the water line, with which a tapping process for removing the water from the water line can be carried out.
- a tap fitting is, for example, a cistern, a faucet, a shut-off valve or a shower.
- Other sanitary fittings are also conceivable.
- the at least one dispensing fitting can be located at a line outlet, i.e. where the flushing fitting is advantageously located, be arranged. It would also be conceivable to arrange the at least one dispensing fitting somewhere between the line inlet and line outlet.
- the dispensing fitting and the flushing fitting can be provided by a single fitting.
- the second temperature sensor is preferably arranged in the area of the dispensing fitting. If several tap fittings are arranged, the second temperature sensor is preferably arranged at the tap fitting which is at the end of the water pipe, viewed in the flow direction of the water.
- the way of expression in the area of the tap is to be understood in such a way that the second temperature sensor is located directly at the tap or at a maximum distance of 3 meters of the water pipe from the tap.
- the second temperature sensor is preferably arranged in the area of the flushing fitting.
- the expression used in the area of the flush fitting is to be understood in such a way that the second temperature sensor is located directly next to the flush fitting or at a maximum distance of 3 meters along the water line from the flush fitting.
- the predetermined period of time is preferably greater than 48 hours or greater than 72 hours.
- the limit value for the second temperature is in the range from 20°C to 30°C, in particular at 25°C.
- the limit value for the second temperature is in the range from 45°C to 60°C, in particular at 50°C.
- control unit also has a time measuring element, which records the time elapsed after a flushing process, which is determined during a tapping process whether the said threshold is reached, and where the elapsed time is reset to zero and restarted when the threshold is reached.
- Another flushing process is triggered after a predetermined period of time has elapsed from the zero position.
- the time period can be chosen according to the above time period.
- the temperature sensors are preferably connected wirelessly or by wire to the control unit for transmitting the measured temperatures.
- the measured temperatures are transmitted as analog or digital signals.
- the flushing fitting preferably has an electrically controllable valve element, it being possible for the valve element to be controlled by the control unit in such a way that the valve element is opened at the start of a flushing process and closed when the flushing process ends.
- the valve element is preferably connected wirelessly or by wire to the control unit for transmitting a control command.
- the control command for closing the flush valve is given when the temperature difference dT has reached the said threshold value dTS.
- the temperature sensors for measuring the water temperature are preferably arranged in such a way that the water temperature can be measured directly or indirectly. With an indirect measurement, the temperature on the outside of the pipe is recorded, which allows conclusions to be drawn about the water temperature. With a direct measurement, the temperature sensors protrude into the pipe and are in direct contact with the water.
- the temperature sensor for measuring the ambient temperature is preferably arranged in an area of a room through the walls of which the water pipe extends or into which the water pipe opens.
- the temperature sensor is preferably a PT1000 element or an NTC element.
- a method for flushing a water line of a sanitary flushing system as described above includes the following steps:
- Fig. 1 is a schematic view of a hygiene flushing system according to one
- Fig. 2 is a schematic representation of temperature profiles at a
- the hygienic flushing system comprises a water line 1, in which water is guided in a flow direction F, a flushing fitting 4 for flushing the water line 1, a control unit 5 for controlling the flushing fitting 4, a first temperature sensor 6 for measuring a first water temperature T1, and a second temperature sensor 7 for measuring a second water temperature T2.
- the water line 1 has a line inlet 2 , a line outlet 3 with a flush fitting 4 and another line outlet 3 with a tap fitting 9 .
- Fresh water flows into the water line 1 via the line inlet 2.
- the flushing valve 4 is actuated by the control unit 5, with the flushing valve 4 being opened so that water can flow out of the water line 1 via the line outlet 3.
- Fresh water then continues to flow via line input 2.
- the water in the water pipe 1 is exchanged.
- Additional tap fittings can also be connected to the water line 1 .
- the additional dispensing fittings can be located somewhere between line input 2 and line output 3 or directly at line output 3.
- the two temperature sensors 6, 7 are spaced apart from one another. Depending on the installation, the distance is several meters or even several tens of meters.
- the first temperature sensor 6 is seen in flow direction F in front of the second temperature sensor 7. During a rinsing process, the fresh water therefore first passes the first temperature sensor 6 and then the second temperature sensor 7.
- the first temperature sensor 6 detects a first water temperature T1 and the second temperature sensor 7 detects a second water temperature T2.
- the second temperature sensor 7 is typically arranged in the area of the dispensing fitting 9 or the flushing fitting 4 .
- the temperature values measured by the temperature sensors 6, 7 are transmitted by the two temperature sensors 6, 7 to the control unit 5, with the control unit 5 processing the temperature values T1, T2 in accordance with the explanations below.
- the two temperature sensors 6 , 7 provide control signals which can be received by the control unit 5 .
- Typical temperature curves are shown in FIG. The time t in seconds is entered on the x-axis and the temperature in °C is entered on the y-axis.
- the upper illustration according to FIG. 2 shows the temperature profile of the first temperature T1 and the second temperature T2 during a dispensing process.
- a constant temperature sets in a water pipe without tapping.
- the first temperature T1 and the second temperature T2 are initially in equilibrium and are approximately 25°C. In practice, this means that without the tapping process, the two temperatures T1 & T2 have typically reached the ambient temperature prevailing on site.
- the first temperature T 1 can also differ from the ambient temperature.
- the first temperature T1 drops very quickly because fresh water flows into the water line. After a certain period of time, the first temperature T1 is essentially constant. In the example at approx. 12°C.
- a temperature difference dT between the first water temperature T1 and the second water temperature T2 is determined by the control unit 5 .
- the flushing fitting 4 is then closed when the temperature difference dT reaches a threshold value dTS.
- the threshold value dTS is shown here according to a particularly preferred embodiment which will be described below.
- the curve dT shows the difference between the temperature T1 and the temperature T2 over time t.
- the rinsing process is interrupted by closing the rinsing fitting 4 . In the representation shown in FIG. 2, this is the case when the profile curve dT intersects the threshold value curve dTS. The point of intersection is marked S.
- the threshold value dTS is determined during the scavenging process as a function of the measured first temperature T1 and/or the measured second temperature T2 at the beginning of the scavenging process.
- the second temperature T2 is measured and recorded as T2_t0.
- T2_t0 represents the second water temperature at the time the flushing process starts.
- T2_t0 is stored in the control unit.
- the temperature T2_t0 measured at the beginning of the flushing process is used as a constant in the calculation formula during the continuous determination of the threshold value dTS.
- the phrase "at the start of the flushing process” is preferably to be understood in such a way that the second temperature is measured when the flushing fitting is opened or immediately afterwards or a few seconds later.
- dTS (T1 - T3)*Q.
- FIG. 2 also shows the effective outflow volume EA and the target outflow volume SA. At the point of intersection S of the two straight lines A and S, the effective outflow volume EA is equal to the target outflow volume SA.
- the threshold value dTS is the difference value between the first water temperature T1 and the second water temperature T2_t0, ie the second water temperature at the beginning of the rinsing process, and formed by multiplying the difference value by a quotient Q.
- the quotient Q is typically greater than 0.
- a preferred quotient according to the example is 0.25. This results in the following numerical example:
- the limit value dTS will also assume a constant value after a certain time.
- the first temperature T1 reaches a constant value approximately 40 to 60 seconds after the beginning of the flushing process.
- the calculated threshold value dTS is also constant.
- the threshold value dTS is -3.25 K after 40 to 60 seconds since the start of the flushing process and the flushing process is ended as soon as the measured temperature difference between T1 and T2 reaches the value of -3.25 K.
- the temperature T2_t0 measured at the beginning of the flushing process or the ambient temperature T3 can be used for the calculation of the threshold value dTS according to the first embodiment.
- Various variants can be used for triggering the flushing process, namely that a flushing process is triggered if the second temperature T2 remains essentially constant over a predetermined period of time and/or that a flushing process is triggered if the second temperature T2 exceeds a limit value and/or that a rinsing process is triggered after a predetermined period of time after the last rinsing process.
- control unit 5 also has a time measuring element.
- the timing element records the elapsed time after a flushing process, with a tapping process determining whether the said threshold value dTS is reached, and with the elapsed time being reset and restarted when the threshold value dTS is reached, and with another flushing process is triggered after a predetermined period of time has elapsed from the zero position. Unnecessary flushing can be avoided by this control if the flushing has already taken place through a dispensing process.
- the temperature sensors 6, 7 and also the flushing fitting 4 are wired or wirelessly connected to the control unit 5.
- the connections are denoted by the reference number 8.
- the temperature values described above are transmitted via this connection as a control signal from the temperature sensors 6, 7 and Control commands to the flush valve 4 transmitted.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Washing And Drying Of Tableware (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112021006269.7T DE112021006269A5 (de) | 2020-12-03 | 2021-11-26 | Hygienespülsystem |
EP21820550.8A EP4256142A1 (de) | 2020-12-03 | 2021-11-26 | Hygienespülsystem |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20211566.3 | 2020-12-03 | ||
EP20211566 | 2020-12-03 |
Publications (1)
Publication Number | Publication Date |
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WO2022117461A1 true WO2022117461A1 (de) | 2022-06-09 |
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ID=73698651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/083185 WO2022117461A1 (de) | 2020-12-03 | 2021-11-26 | Hygienespülsystem |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4256142A1 (de) |
DE (1) | DE112021006269A5 (de) |
WO (1) | WO2022117461A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2500475A2 (de) | 2011-03-14 | 2012-09-19 | VIEGA GmbH & Co. KG | Verfahren und Vorrichtung zum selbsttätigen Spülen von Leitungen |
GB2496640A (en) * | 2011-11-17 | 2013-05-22 | William Henry Saint | Flushing apparatus and method for a water system of a building |
EP2987919A1 (de) * | 2014-08-20 | 2016-02-24 | Geberit International AG | Spülvorrichtung |
DE102019201263A1 (de) * | 2019-01-31 | 2020-08-06 | Gebrüder Kemper Gmbh + Co. Kg Metallwerke | Trink- und Brauchwassersystem und Verfahren zum Spülen desselben |
DE102019107179A1 (de) * | 2019-03-20 | 2020-09-24 | Klaus-Dieter Will | Verfahren zur Wasserversorgung von mindestens einer Wasserentnahmestelle mit Kalt- und Warmwasser |
-
2021
- 2021-11-26 EP EP21820550.8A patent/EP4256142A1/de active Pending
- 2021-11-26 WO PCT/EP2021/083185 patent/WO2022117461A1/de active Application Filing
- 2021-11-26 DE DE112021006269.7T patent/DE112021006269A5/de active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2500475A2 (de) | 2011-03-14 | 2012-09-19 | VIEGA GmbH & Co. KG | Verfahren und Vorrichtung zum selbsttätigen Spülen von Leitungen |
GB2496640A (en) * | 2011-11-17 | 2013-05-22 | William Henry Saint | Flushing apparatus and method for a water system of a building |
EP2987919A1 (de) * | 2014-08-20 | 2016-02-24 | Geberit International AG | Spülvorrichtung |
DE102019201263A1 (de) * | 2019-01-31 | 2020-08-06 | Gebrüder Kemper Gmbh + Co. Kg Metallwerke | Trink- und Brauchwassersystem und Verfahren zum Spülen desselben |
DE102019107179A1 (de) * | 2019-03-20 | 2020-09-24 | Klaus-Dieter Will | Verfahren zur Wasserversorgung von mindestens einer Wasserentnahmestelle mit Kalt- und Warmwasser |
Also Published As
Publication number | Publication date |
---|---|
DE112021006269A5 (de) | 2023-12-21 |
EP4256142A1 (de) | 2023-10-11 |
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