EP2500475B1 - Method and advice for self-actuated rinsing of pipes - Google Patents

Method and advice for self-actuated rinsing of pipes Download PDF

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Publication number
EP2500475B1
EP2500475B1 EP12154715.2A EP12154715A EP2500475B1 EP 2500475 B1 EP2500475 B1 EP 2500475B1 EP 12154715 A EP12154715 A EP 12154715A EP 2500475 B1 EP2500475 B1 EP 2500475B1
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EP
European Patent Office
Prior art keywords
temperature
measured
rinsing
flushing
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP12154715.2A
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German (de)
French (fr)
Other versions
EP2500475A2 (en
EP2500475A3 (en
Inventor
Stefan Leymann
Oliver Cyliax
Christian Becker
Stefan Schulte
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Viega Technology GmbH and Co KG
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Viega Technology GmbH and Co KG
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Publication of EP2500475A3 publication Critical patent/EP2500475A3/en
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    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00Water main or service pipe systems
    • E03B7/006Arrangements or methods for cleaning or refurbishing water conduits
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00Water main or service pipe systems
    • E03B7/07Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
    • E03B7/08Arrangement of draining devices, e.g. manual shut-off valves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027Cleaning the internal surfaces; Removal of blockages
    • B08B9/032Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0325Control mechanisms therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00Domestic hot-water supply systems
    • F24D17/0073Arrangements for preventing the occurrence or proliferation of microorganisms in the water
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/0318Processes
    • Y10T137/0402Cleaning, repairing, or assembling
    • Y10T137/0419Fluid cleaning or flushing
    • Y10T137/0424Liquid cleaning or flushing

Description

  • The invention relates to a method for the automatic rinsing of liquid lines, especially drinking water pipes. Furthermore, the invention also relates to a device for the automatic rinsing of liquid lines, in particular drinking water pipes.
  • Methods of the type mentioned are already known from the prior art. If liquid lines are not used continuously, deposits may form in the liquid-carrying pipes, which may hinder liquid transport or block parts of the pipe system. Furthermore, microorganisms, such as bacteria, for example Pseudomonas or Legionella, can form in particular in drinking water pipes and pose a health risk for humans. Regular use of the water pipes prevents these dangers. However, regular use of the lines is often not possible because, for example, hotel rooms may not be occupied for long periods or public buildings may be closed for longer periods. For this reason, methods have been developed to automatically initiate the flushing of the lines.
  • For example, from the patent EP 1 964 983 B1 a method is known which can make the flushing of a drinking water system electronically via a central controller.
  • However, even with these methods, it is still not possible to ensure that bacteria multiply in drinking water pipes. Thus, there is still the need to ensure improved hygiene. For example, the rinse frequency or duration can be increased to ensure better hygiene. However, an increased flushing has the disadvantage that the flushing can take place at times, to which residents feel disturbed, for example due to the night's sleep. Also associated with a more frequent rinsing water consumption is considered disadvantageous.
  • The DE 20 2008 002 822 U1 describes a drinking and service water supply device, wherein a pressure sensor for detecting a leak and also a temperature sensor are provided.
  • In the WO 01/61224 A1 a mixer tap for hot and cold water with a temperature sensor is described.
  • The US 4,774,978 A relates to a safety mechanism which rinses residual hot water by means of cold water from a common supply line. In this case, a temperature sensor is provided.
  • In the US 2005/103693 A1 An automatic rinsing system for a water supply station with a temperature control is disclosed.
  • The DE 20 2006 016416 U1 relates to a method for operating a drinking water system with a water circulation pipe.
  • From the US 2005/274814 A1 a water extraction system is known in which an automated cleaning can be done on a temperature basis.
  • The US 5,025,754 A discloses a drinking water distribution system in which the water is exchanged when a certain temperature is exceeded. On this basis, the invention is therefore the technical problem of specifying a method for automatic rinsing, which allows a better adapted to the circumstances and more reliable rinsing.
  • According to the teaching of the invention, the technical problem is provided by a method for automatic rinsing of at least one liquid line, in particular drinking water pipe, in which time- or volume-controlled rinsing operations, in which a temperature profile of the liquid is measured, in which the measured data are evaluated and at in which the automatic purging of the at least one fluid line is influenced by a result of the evaluation.
  • According to the invention, it has been recognized that if a temperature profile of the liquid is measured, this measurement data can be used to optimize the automatic rinsing, ie the rinsing behavior. For example, because microorganisms only within a certain Temperature intervals are viable, thus a conclusion on any existing microorganisms can be drawn or whose occurrence is almost impossible due to the temperature values. A usage behavior of the line can also be determined by the measured data. If, for example, a cold water line is used, the temperature changes since inflowing cold water is generally colder than water in the line. Accordingly, when using a hot water pipe, the temperature of the water changes, since inflowing warm water is usually warmer than water in the line. By evaluating the measured data, the automatic rinsing can thus be adjusted individually. According to the invention, a rinsing process is prevented when no constant temperature is measured for a predetermined period of time. Sufficient use causes temperature fluctuations in the piping system. In this case, a rinsing process, which should possibly be carried out according to plan, be dispensed with. In this way, unnecessary rinsing can be avoided and water can be saved.
  • A temperature profile is understood to be a time-resolved information about the temperature. Thus, at least two temperature readings at different times are required to measure a temperature history.
  • The temperature measurement can be carried out either directly or indirectly. Direct measurement of the temperature of the liquid means that the temperature of the liquid itself can be measured, for example by temperature sensors which are in direct contact with the liquid. Preferably, the temperature of the liquid is measured indirectly. It can be the temperature of the liquid-carrying system, so for example, the lines or connectors, measured. This can be done via sensors in contact with the line system. A non-contact measurement is but also conceivable. So can in a simple way Conclusion to be drawn on the temperature of the liquid.
  • The method according to the invention is implemented with time-controlled or volume-controlled rinsing operations. For timed rinsing a flushing calendar can be programmed, in which times, at which a rinse should preferably take place, are stored. These times may also differ for different days of the week. These rinsing operations can also be influenced by the method according to the invention.
  • The liquid line is preferably a drinking water line for cold water (TWK line) or a drinking water line for hot water (DHW line). Especially with these lines, it is particularly important to be able to ensure, for example, a high degree of cleanliness of the water, as this can have a direct impact on human health.
  • The inventive method can also be performed on multiple lines, wherein one or more lines can be TWK lines and one or more lines can be TWW lines. In this way, the inventive method can be performed easily on all lines to be rinsed.
  • A flushing process can be triggered, terminated, not triggered, prevented or continued by a result of the evaluation. In this way, the flushing behavior can be influenced in a simple manner directly by the evaluation become. This is preferably done via electronic means that can measure the temperature profile, can make the evaluation and can control the flushing behavior. This can be done for example via one or more valves. The valves can be opened to initiate a flush and left open to continue an ongoing flush. The valves can be closed to stop a flushing operation or remain closed in order not to trigger a flushing process or to prevent a planned flushing process. In this way, an interaction between statically planned rinsing operations and the results of the evaluation of the measured data can take place. However, other elements are conceivable which make it possible to rinse the liquid. The different consequences of the evaluation can all be implemented separately from one another in the method according to the invention.
  • A rinsing process is thus essentially understood to mean the process which allows the liquid to flow and then stops it again. However, a rinsing process can also have interruptions, for example, or several rinsing operations can also be combined into one.
  • It is advantageous if a flushing process is continued until a temperature limit value and / or a temperature gradient limit value is exceeded or fallen below. In this way it can be ensured in a simple manner that a sufficient flushing of the line system has taken place. Even if the water in the piping system is completely replaced during a flushing process, it may still not be possible to ensure that there is sufficient water Disinfection of the pipe system has taken place. Since microorganisms are generally only viable within a certain temperature interval, the rinsing process can be continued until the temperature values limiting the temperature interval are exceeded or fallen below during the rinsing process. For example, when purging a hot water pipe, the purging process can only be stopped when a temperature of 60 ° C is measured. These temperature limits can be fixed. However, it is also conceivable that the temperature limits are dependent on other factors, such as the room temperature.
  • A flushing process may be continued until a substantially constant temperature is measured for a predetermined period of time. By checking whether a substantially constant temperature is measured for a predetermined period of time, the degree of disinfection and thus the hygiene of the piping system can be further improved. Thus, during a flushing process, not only must a temperature limit value be exceeded or exceeded for a short time, but a substantially constant temperature must be measured for a predetermined period of time. This ensures that the line system has been sufficiently flushed and that the liquid has a sufficiently cold or warm temperature for a sufficient time. Preferably, when flushing a hot water pipe, a temperature of at least 60 ° C is measured for a time.
  • It is also conceivable if a flushing process is triggered when a substantially constant temperature is measured for a predetermined period of time. If a substantially constant temperature is measured for a given period of time, it can be concluded that there is no or little use. In this case, then a flushing process can be triggered. Thus, it can be ensured in a simple manner that a flushing process is carried out in the case of lack of use.
  • A flushing operation can be triggered if a sufficiently rapid temperature change is not measured for a given period of time. In this way, the slope of the temperature profile can be included in the evaluation. This makes it possible to determine even more reliably whether a use of the line system has taken place. Thus, natural slow temperature fluctuations can be distinguished from faster fluctuations caused by the use, and optionally a flushing process can be triggered. Accordingly, a rinsing process can be prevented if for a predetermined time a sufficiently fast temperature change is measured.
  • It is now particularly advantageous if the temperature is measured by means of a temperature sensor on the pipeline. Thus, a relatively accurate value of the temperature of the liquid can be determined in a simple and cost-effective manner, which can be used for the evaluation. The measurement can be direct and / or indirect, for example in the medium itself and / or on the outer wall of the pipeline.
  • The temperature measurement can be carried out at different positions or even several positions of the installation. For this purpose, it is advantageous if the temperature sensor is designed as a separate component, which can be used flexibly at different positions, for example, a ring or series line.
  • Moreover, a temperature sensor designed as a separate component, for example as a transition piece, has the advantage that the temperature sensor can be installed in such a way that it has direct contact with the liquid. Such a transition piece preferably has a threaded connection on both sides, so that it can be flexibly integrated into piping systems.
  • Such a separate element is also advantageous for systems which have plastic pipes, since the thermal conductivity of the plastic is insufficient for temperature values with no or only slight time delays for temperature sensors fastened to the outer wall of plastic pipes to be able to measure. So in this case a direct temperature measurement is advantageous.
  • Preferably, the temperature is measured at or in a tee or at or in a U-piece of the tubing. For this purpose, a separate component can be installed. This can then already have the temperature sensor. In the case of the T-piece, two arms of the T-piece can form the actual conduit, while the third arm of the T-piece is used for purging the conduit according to the invention. If the temperature is measured at a T-piece, both the normal use and an inventive flushing effect on the temperature profile. Thus, the temperature measurement can also take place in the vicinity or within a device according to the invention for the automatic rinsing of liquid lines.
  • Furthermore, a device for the automatic rinsing of liquid lines, in particular drinking water lines, is described. With regard to the advantages of the device, reference is made to the description of the method according to the invention. The device is suitable for carrying out a method according to the invention. The device has means for measuring the temperature, means for detecting, storing and evaluating the measured temperature values and means for performing a rinsing process on which perform time- or volume-controlled rinsing operations, wherein the device is arranged such that a rinsing process is inhibited, if for a predetermined period no constant temperature is measured. Different means for measuring the temperature and for detecting, storing and Evaluation of the temperature values are known from the prior art. Means for carrying out the rinsing process are in particular a valve, for example a solenoid valve understood. But it can also be provided several valves. This can be opened and closed electronically. The device can be operated in both series and ring installations.
  • Optionally, for example, a shut-off valve, for example a ball valve, may be provided, which is arranged in front of a means for performing the rinsing process. Thus, the liquid line can be shut off manually for assembly or maintenance purposes.
  • Preferably, the device has a free outlet, so that no direct contact between the piping system to be flushed and the sewer system arises.
  • In addition, the device preferably has two outlets, preferably as a siphon. As a result, the liquid can easily flow quickly into the sewage system and an odor trap to the sewage system can be realized. But it is also conceivable only one outlet or more than two outlets.
  • Preferably, a backflow sensor is also provided. This can ensure that no water damage caused by an automatic rinsing. The backflow sensor system can preferably prevent rinsing operations in order to avoid damage from overflowing water. In addition, it is also possible to output an interference signal which is acoustically and / or optically and / or in the form of an electrical signal to a building technology.
  • The aforementioned components are preferably mounted on a base frame, which can be closed by means of a cover.
  • The device may include means for purging a single or even multiple fluid lines. For example, only one TWK pipe can be flushed, or a TWK and TWW pipe. But it can just as well be rinsed even more lines. Preferably, the rinsing of the individual lines can be controlled separately from one another. However, this can be done via a common control module.
  • It is particularly advantageous if the device is modularly constructed of individual components, so that, without affecting the function of the device, individual components can be removed or added if necessary.
  • Particularly preferably, a temperature sensor is provided on a pipeline. Thus, a relatively accurate value of the temperature of the liquid can be determined in a simple and cost-effective manner, which can be used for the evaluation. The measurement can be direct and / or indirect, for example in the medium itself and / or on the outer wall of the pipeline.
  • Means for measuring the temperature may preferably be provided on a T-piece or U-piece. Here, two arms of the T-piece can form the actual line, while the third arm of the T-piece is used for flushing the pipe according to the invention. The temperature is at a tee measured, both the normal use and an inventive flushing effects on the temperature profile. Thus, the temperature measurement can also take place in the vicinity or within a device for the automatic rinsing of liquid lines.
  • An embodiment of the means for measuring the temperature as a separate component is particularly advantageous for flexible positioning in the pipeline system.
  • In the following the invention will be explained in more detail with reference to embodiments illustrated in a drawing. In the drawing show:
  • Fig. 1
    a connector on which a temperature profile can be measured,
    Fig. 2
    an embodiment of a device in a perspective view,
    Fig. 3
    the device off Fig. 2 in a frontal view,
    Fig. 4
    a further embodiment of a device in a perspective view,
    Fig. 5
    a temperature profile during the execution of a method and
    Fig. 6
    a further temperature profile during the execution of a method.
  • Fig. 1 shows a connector 1 of a conduit system to which a temperature profile can be measured indirectly according to the inventive method. An application temperature sensor 2 is attached to the connector 1 by means of a sensor attachment 4. The connecting piece 1 is designed here as a double connection piece or as a T-piece. The liquid of the conduit system flows through one of the openings 6 in the connector and flows out of the connector 1 in normal use through the other opening 8 again. If a rinsing process takes place, the liquid flows out of the third opening 10 out of the connecting piece 1. In principle, however, other embodiments for measuring the temperature profile are conceivable.
  • Fig. 2 now shows an embodiment of a device for purging drinking water pipes in a perspective view. However, the embodiment is not limited to the flushing of drinking water pipes.
  • On a base frame 12, a part of a first so-called water section 100 is already mounted on the base frame. A solenoid valve 16, two flat-sealing transition pieces 18, 20 and a pipe section 22 are already mounted. The first water path 100 optionally further comprises a connecting piece 1 and an optional shut-off valve 14. By means of the connector 1, the device is connected, for example, to an existing line system, in particular a ring line.
  • If the solenoid valve 16 is opened for a flushing, the water flows through the connector 1, through the open shut-off valve 14, which is connected by a transition piece 18 to the solenoid valve 16, through the open solenoid valve 16, which by means of another transition piece 20 and a piece of pipe 22 is connected and through the pipe section 22 in the outlets 24. This is done by means of a free outlet to cause no direct contact between the piping system to be flushed and the sewer system. The water then flows through two outlets 24 in the form of siphons, not shown, in the sewage system.
  • The device also includes a power supply 26 and a control module 28. The control module 28 enables the measurement of the temperature profile by the temperature sensor 2, the evaluation of the measured data and the control of the solenoid valve 16. Also data of a backflow sensor can be processed by the control module 28.
  • The base frame also provides enough space for the implementation of a second waterway 100 '. This is constructed analogously to the first water section 100, but can also be designed differently. It is also possible to provide only one waterway or more than two. Wiring of the electronic components is not shown here.
  • Fig. 3 shows the device Fig. 2 in a frontal view. Here are now both waterways 100 and 100 'installed. The first water section 100 may, for example, be a cold water section, while the second water section 100 is a hot water section.
  • Fig. 4 shows a device similar to the Fig. 3 , For clarity, not all are already in Fig. 2 or Fig. 3 used reference characters registered, even if corresponding elements are present. Unlike the device Fig. 3 only one outlet 30 is provided with a siphon, not shown. The temperature sensors 2, 2 ', the solenoid valves 16, 16' and the backpressure sensors (not shown) are wired to the control module 28. However, it is also conceivable to provide wireless communication between the individual elements.
  • Furthermore, a cover 32 is shown to cover the base frame. The cover 32 has an opening 34 through which the control module 28 can be easily accessed, even when the cover 32 is mounted. The cover can be closed by means of a cover plate 36.
  • Fig. 5 shows an exemplary temperature profile during the execution of an embodiment of a method. During the period up to t 1 no use of a hot water pipe takes place. For this reason, the temperature does not change significantly and is below the temperature T 2 . The temperature T 2 is for example 60 ° C. If the time until time t 1 too long, a flushing process is triggered. Due to the warm water, the temperature increases and the flushing process can be terminated at time t 3 , when the temperature limit T 2 is exceeded. However, in order to save water, the rinsing process can already be ended at the time t 2 , if only a small change in the temperature takes place and, for example, a temperature limit value is undershot. So you do not have to wait until it exceeds or falls below a temperature limit, which may not be reached or only slowly reached.
  • Fig. 6 finally shows a further temperature profile during the execution of a method. The solid curve shows the temperature profile of a hot water pipe. In use, the measured temperature value regularly exceeds a temperature limit T 2 (represented by the upper dashed short dashed line) indicative of use, and thus, for example, a scheduled purge may be inhibited or a timer restarted that measures the time of non-use to initiate a flushing process if it is not used for a long time.
  • Analogously, the long-dashed curve shows the temperature profile of a cold water line. A use here has accordingly a falling below a temperature limit T 1 (represented by the lower short-dashed line) result, for example, a planned flushing process can be prevented or a timer can be restarted.

Claims (4)

  1. Method for automatic flushing of at least one fluid line, in particular a potable water line,
    - in which time or volume controlled flushing processes are provided,
    - in which a temperature profile of the fluid is directly or indirectly measured,
    - in which the measured data are evaluated and
    - in which the automatic flushing of the at least one fluid line is influenced by an outcome of the evaluation,
    characterised in that
    a flushing process is prevented when a constant temperature is measured for a predefined time period.
  2. Method according to claim 1, characterised in that the fluid line is a cold potable water line or a hot potable water line.
  3. Method according to claim 1 or 2, characterised in that the temperature is measured by means of a temperature sensor on the pipeline.
  4. Method according to any one of claims 1 to 3, characterised in that the temperature is measured at a T-piece of the pipeline.
EP12154715.2A 2011-03-14 2012-02-09 Method and advice for self-actuated rinsing of pipes Active EP2500475B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102011013955.9A DE102011013955B4 (en) 2011-03-14 2011-03-14 Method for automatic rinsing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL12154715T PL2500475T3 (en) 2011-03-14 2012-02-09 Method and advice for self-actuated rinsing of pipes

Publications (3)

Publication Number Publication Date
EP2500475A2 EP2500475A2 (en) 2012-09-19
EP2500475A3 EP2500475A3 (en) 2012-11-21
EP2500475B1 true EP2500475B1 (en) 2017-07-19

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Family Applications (1)

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EP12154715.2A Active EP2500475B1 (en) 2011-03-14 2012-02-09 Method and advice for self-actuated rinsing of pipes

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US (1) US9695577B2 (en)
EP (1) EP2500475B1 (en)
DE (1) DE102011013955B4 (en)
DK (1) DK2500475T3 (en)
PL (1) PL2500475T3 (en)

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Publication number Publication date
EP2500475A2 (en) 2012-09-19
PL2500475T3 (en) 2017-12-29
DK2500475T3 (en) 2017-09-18
DE102011013955A1 (en) 2012-09-20
US9695577B2 (en) 2017-07-04
EP2500475A3 (en) 2012-11-21
DE102011013955B4 (en) 2018-12-27
US20120234398A1 (en) 2012-09-20

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