EP2292851A1 - Hauswassersystem mit Wasserhähnen mit einem Spülkanal zwischen dem Warmwasseranschluss und dem Kaltwasseranschluss zur Vermeidung von Legionellen - Google Patents

Hauswassersystem mit Wasserhähnen mit einem Spülkanal zwischen dem Warmwasseranschluss und dem Kaltwasseranschluss zur Vermeidung von Legionellen Download PDF

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Publication number
EP2292851A1
EP2292851A1 EP10170820A EP10170820A EP2292851A1 EP 2292851 A1 EP2292851 A1 EP 2292851A1 EP 10170820 A EP10170820 A EP 10170820A EP 10170820 A EP10170820 A EP 10170820A EP 2292851 A1 EP2292851 A1 EP 2292851A1
Authority
EP
European Patent Office
Prior art keywords
water
hot
mixer
permanent
connection
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.)
Withdrawn
Application number
EP10170820A
Other languages
English (en)
French (fr)
Inventor
Hendricus Markman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MARKMAN BEHEER B.V.
Original Assignee
Aquador BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aquador BV filed Critical Aquador BV
Publication of EP2292851A1 publication Critical patent/EP2292851A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/04—Water-basin installations specially adapted to wash-basins or baths
    • 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
    • E03B7/04—Domestic or like local pipe systems
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0073—Arrangements for preventing the occurrence or proliferation of microorganisms in the water

Definitions

  • the object of the invention is, among others, counteracting legionella bacteria preventive or curative in tap points of sanitary installations, by flushing the pipes and tap points with sufficiently hot water.
  • This invention is applicable to flushing with hot water, but is also applicable to other ways of treating a sanitary facility, such as cleaning or disinfecting, for example, which is flushed with a chemical such as chlorine.
  • the object of the invention is versatile.
  • One of the more important aspects that is preferred, is to be able to adapt an existing sanitary facility at low costs for safely and in water saving manner flushing while after all the legionella bacteria can be attacked reliably.
  • the invention is according to the claims.
  • the proposal is thus for a mixer, to which thus the hot and cold water pipes are connected, to provide internally of the mixer in at least one and preferably both flow directions a permanent water connection (so called flush channel) between the hot and cold water side, preferably inside or immediately upstream of the valves with which the tap/faucet is opened, such that with completely closed tap, such that no water can flow from its spout, through said permanent connection the water can flow from the hot to the cold water side while no water flows from the spout.
  • this water connection has a flow area equal to a hole with a diameter of 0.5, 1, 1.5, or 2 millimetre or less.
  • a slot is made in one of the closure discs, providing the permanent water connection.
  • a hole with a diameter of 0.7 millimetre is drilled.
  • the permanent water connection will provide during operation that through said water connection a leakage is always flowing, e.g. if on opens merely the cold water side, nevertheless a leakage will flow from the hot water pipe though the water connection into the spout. By making the flow area of the water connection sufficiently small, this leakage is neglectable.
  • the seal between the cold and hot water gate is partly or completely removed, such that when the tap is closed, cold water can flow from the cold water pipe through the cold water gate, via the removed part of the seal into the hot water gate and subsequently into the hot water pipe, or vice versa.
  • This modification of an existing mixer can also be applied to different mixer types.
  • the water pressure inside the water pipe (e.g. hot water pipe) to which the water flows through the flushing channel, for this water flow with closed faucet through the flushing channel from the cold water pipe to the hot water pipe, or vice versa lower than the water pressure in the other water pipe (e.g. cold water pipe).
  • the hot and/or cold water pipe is provided with a check valve obstructing a water flow opposite the direction during normal operation.
  • the check valve in the hot or cold water pipe is of the type with switching means such that the sealing action can be switched on and off, e.g. in that the switching means are sensitive to water pressure such that by a pressure pulse of pressure change of sufficient magnitude in the relevant pipe, the switching on and off takes place.
  • Flushing is preferably carried out such that hot water flows through the cold water pipe, preferably wherein at a central location remote from the tap points hot water is injected into the cold water pipe and through said cold water pipe flows to the tap point and from the tap points flows to the hot water pipe, such that within the hot water pipe the water flows in opposite direction during flushing.
  • the water pressure in the pipe system is changed such that the check valve in the hot water pipe is switched off such that during flushing the flow in opposite direction from the tap point inside and through the hot water pipe is allowed.
  • the check valve in the hot water pipe is switched on again to prevent during typical operation of the sanitary facility that water from the tap point flows inside and through the hot water pipe.
  • the water pressure in the hot and cold water pipe which is flushed can be lower than the typical operation pressure, e.g. substantially equal to atmospheric pressure (pressureless), or higher than the typical operation pressure.
  • the pressure change is preferably larger than a pressure fluctuation that happens during typical operation of the sanitary installation.
  • the pressure of the to the public water delivery system connected sanitary installation is about 2.5 bar (atmospheric pressure head) during typical operating conditions and at street level.
  • Pressure fluctuation for opening and closing of taps is typically no more than 5% of the typical operating pressure.
  • the pressure change according to the invention is preferably at least 0.5 bar or 10% of the typical operating pressure. More preferably the pressure change is at least about 1 bar or 20%, more preferably at least about 1.5 bar or 30% of the typical operating pressure. To be able to flush effectively, the pressure in the pipe should be at least 1 bar (atmospheric pressure head).
  • the pressure is increased compared to the typical operating pressure.
  • This pressure increase is preferably 2 bar or 40% of the typical operating pressure.
  • a typical water pressure of 2.5 bar (atmospheric pressure head, 5 bar is applied during flushing.
  • a closing means is set such that it switches at about the pressure caused by the pressure change, or a pressure between the pressure caused by the pressure change and the typical operating pressure. E.g. taking a typical operating pressure of 2.5 bars as a starting point and a flushing pressure of 5 bars, the valve will switch at 4 bar.
  • flushes with hot water preferably higher than about 55 or 60 degrees Celsius to effectively kill bacteria.
  • flushing with cold water preferably below 25 degrees Celsius, can be a proper alternative.
  • a chemical treatment e.g. a chemical treatment can be carried out during flushing, e.g. with a solution of liquid and citric acid.
  • This invention also relates to the combination of one or more separate features of the invention and one or more separate features as disclosed in EP1820910A2 , the disclosure of which is integrally inserted here.
  • tap points to which two supply pipes (for hot and cold water) are connected are provided with an internal connection between the two supply pipes, such that also during typical operation the tap point always taps simultaneously from both supplu pipes, also if one of the two by the mixer operated valves is completely closed and completely seals water flow from the relevant supply pipe to the spout.
  • the flushing medium is injected, e.g. in a pipe part common to all related tap points such as immediately downstream from the water meter.
  • the flushing fluid successively flows through the one supply pipe, then through the mixer and through the flushing channel in it into the other supply pipe and then flows further, e.g. in recirculation.
  • no flushing fluid flows from the spout of the mixer, thus all flushing fluid flows from the one supply pipe through the mixer inside the other supply pipe.
  • the object is to treat an installation with a plurality of tap points integral, as much as possible automated/mechanised.
  • Fig. 1-4 show pipe designs.
  • Fig. 1 shows an example of flushing a hot water pipe from the cold water pipe, or vice versa.
  • Pipe 12 is connected to the domestic water supply.
  • a flushing channel with small flow area inside the mixer 8 functioning as tap point, water can flow between the cold water pipe 2 and hot water pipe 3.
  • flushing valve 1 is open and water flows through the flushing channel. If the pressure in pipe 3 is sufficient lower compared to pipe 2, or vice versa, water automatically flows from pipe 2 through the flushing channel inside mixer 8 into pipe 3 (or from pipe 3 through the mixer 8 into pipe 2).
  • Fig. 2-4 show a pipe design in three different operating modes, based on the principle of flushing with pressure increase. Illustrated is an electronic control unit which switches through the five pilot lines 25, the pump 9 and the valves 20, 21, 22, 23 and 24 according to the three different operating modes.
  • To the water facility of the building are connected a sewer drain, a washstand mixer, boiler, bath mixer and toilet flusher. Interesting to mention is that at the two mixer taps, during flushing there is no water dispensing at these taps, which is safe with hot flushing. Inside the mixers there is permanent connection with small flow area between the hot and cold water pipe. During flushing water is dispensed in the toiler flusher through a valve 1 which is closed during typical operation.
  • Fig. 2 shows typical operation
  • fig. 3 shows flushing the cold water pipe with hot water
  • fig. 4 shows rinsing with cold water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Bathtubs, Showers, And Their Attachments (AREA)
  • Domestic Plumbing Installations (AREA)
EP10170820A 2009-07-25 2010-07-26 Hauswassersystem mit Wasserhähnen mit einem Spülkanal zwischen dem Warmwasseranschluss und dem Kaltwasseranschluss zur Vermeidung von Legionellen Withdrawn EP2292851A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2003291 2009-07-25
NL2005157A NL2005157C2 (nl) 2009-07-25 2010-07-24 Systeem voor het doorspoelen van mengkranen met spoelkanaal van het sanitaire systeem van een woning.

Publications (1)

Publication Number Publication Date
EP2292851A1 true EP2292851A1 (de) 2011-03-09

Family

ID=42805967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10170820A Withdrawn EP2292851A1 (de) 2009-07-25 2010-07-26 Hauswassersystem mit Wasserhähnen mit einem Spülkanal zwischen dem Warmwasseranschluss und dem Kaltwasseranschluss zur Vermeidung von Legionellen

Country Status (2)

Country Link
EP (1) EP2292851A1 (de)
NL (1) NL2005157C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105189877B (zh) * 2013-03-08 2017-03-29 I.V.A.R.股份公司 用于混合水以用于卫生设备以及用于实施抗军团菌消毒的装置、组件以及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3723089A1 (de) * 1987-07-13 1989-01-26 Stiebel Eltron Gmbh & Co Kg Brauchwasserzapfanordnung
DE3832837A1 (de) * 1988-09-28 1990-03-29 Stiebel Eltron Gmbh & Co Kg Leitungsanordnung zur warmwasserversorgung
DE102004033307A1 (de) * 2003-09-05 2005-03-31 Bernhard Miller Verfahren zum Betrieb einer zentralen Warmwasserversorgungsanlage in Gebäuden
EP1820910A2 (de) 2006-02-20 2007-08-22 Hendricus Markman Spülen von Leitungen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3723089A1 (de) * 1987-07-13 1989-01-26 Stiebel Eltron Gmbh & Co Kg Brauchwasserzapfanordnung
DE3832837A1 (de) * 1988-09-28 1990-03-29 Stiebel Eltron Gmbh & Co Kg Leitungsanordnung zur warmwasserversorgung
DE102004033307A1 (de) * 2003-09-05 2005-03-31 Bernhard Miller Verfahren zum Betrieb einer zentralen Warmwasserversorgungsanlage in Gebäuden
EP1820910A2 (de) 2006-02-20 2007-08-22 Hendricus Markman Spülen von Leitungen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105189877B (zh) * 2013-03-08 2017-03-29 I.V.A.R.股份公司 用于混合水以用于卫生设备以及用于实施抗军团菌消毒的装置、组件以及方法

Also Published As

Publication number Publication date
NL2005157A (nl) 2011-01-31
NL2005157C2 (nl) 2011-09-09

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