EP1050633B1 - Verbesserung bezüglich der Spülzuverlässigkeit eines Urinals - Google Patents

Verbesserung bezüglich der Spülzuverlässigkeit eines Urinals Download PDF

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Publication number
EP1050633B1
EP1050633B1 EP00660082A EP00660082A EP1050633B1 EP 1050633 B1 EP1050633 B1 EP 1050633B1 EP 00660082 A EP00660082 A EP 00660082A EP 00660082 A EP00660082 A EP 00660082A EP 1050633 B1 EP1050633 B1 EP 1050633B1
Authority
EP
European Patent Office
Prior art keywords
urinal
sensor
flushing
vibrator
sensors
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.)
Expired - Lifetime
Application number
EP00660082A
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English (en)
French (fr)
Other versions
EP1050633A3 (de
EP1050633A2 (de
Inventor
Ari Toivonen
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.)
Oras Oy
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Oras Oy
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Filing date
Publication date
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Publication of EP1050633A2 publication Critical patent/EP1050633A2/de
Publication of EP1050633A3 publication Critical patent/EP1050633A3/de
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Publication of EP1050633B1 publication Critical patent/EP1050633B1/de
Anticipated expiration legal-status Critical
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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D13/00—Urinals ; Means for connecting the urinal to the flushing pipe and the wastepipe; Splashing shields for urinals
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D5/00—Special constructions of flushing devices, e.g. closed flushing system
    • E03D5/10—Special constructions of flushing devices, e.g. closed flushing system operated electrically, e.g. by a photo-cell; also combined with devices for opening or closing shutters in the bowl outlet and/or with devices for raising/or lowering seat and cover and/or for swiveling the bowl
    • E03D5/105—Special constructions of flushing devices, e.g. closed flushing system operated electrically, e.g. by a photo-cell; also combined with devices for opening or closing shutters in the bowl outlet and/or with devices for raising/or lowering seat and cover and/or for swiveling the bowl touchless, e.g. using sensors

Definitions

  • This invention relates to a method for improving the flushing reliability of a urinal, as well as to an arrangement applying the method for improving the flushing reliability of a urinal.
  • the sensors respond for example to the heat content of urine or to the change of electrical conductivity brought about by urine in the liquid present in a urinal.
  • One requirement regarding the use of a sensor monitoring the urine-induced changes in electrical conductivity is that, in order to work properly, it must be placed inside the wall of a urinal within a body of liquid contained in the urinal or its water seal.
  • Another possibility, particularly with sensors capable of detecting a temperature change is that the sensor be positioned outside the wall of a urinal or its water seal. In solutions like this, it is possible that the wall thickness of a urinal or its water seal must be reduced for enhancing the sensitivity of a sensor.
  • a sensor which identifies a vibration caused by incoming urine in a urinal or in a liquid contained therein, the flushing being set off as a result thereof.
  • a sensor can be positioned outside the wall of a urinal or its water seal.
  • the sensor can be placed in a liquid basin on the floor of a urinal or in the water seal.
  • Urine contains mostly water, but the actual ureal matter or urea contains various minerals, such as phosphates and recrements. In the cited publication, these matters are referred to as urine stone. Urine stone causes problems regarding the operation of the above-described automatic systems for flushing a urinal. Problems arise from the fact that such urine stone is prone to adhere to the internal surface of a urinal, as well as, respectively, to the internal surface of a water seal, thus affecting the operation of sensors mounted on the external surface of the urinal or water seal. Furthermore, in case the sensors are positioned inside a urinal or a water seal, and said sensors come to contact with urine, the urine stone may stick to sensor surfaces and thus undermine the operation and sensitivity of the sensors. In the worst case, the identification sensor may cease to operate completely as a result of having a sufficiently thick layer of urine stone adhered thereto.
  • the urinal flushing water may contain similar substances having an adverse effect on the operation of sensors.
  • Various minerals present in the flushing water may stick the same way to the surface of a urinal and a water seal, as well as to the surface of sensors.
  • a publication US-A-5035140 is known to disclose an arrangement where the effluent level in an aircraft lavatory holding tank is detected by emitting vibrations into a wall of the tank and measuring the mechanical response of the wall with a vibration-sensitive receiver. In order to keep the receiver clean enough for reliable operation there is emitted every now and then a particularly violent burst of vibration, the purpose of which is to dislodge any accumulated dirt and sediment.
  • the objects of the invention are achieved by a method having the features that are recited in the independent patent claim directed to a method and an arrangement having the features that are recited in the independent patent claim directed to an arrangement.
  • the urinal or the water seal with the appropriately placed vibrator is being operated regularly for removing impurities from the surface of the urinal, the water seal, or the sensor.
  • the solution of the invention can be used for preventing the adherence of urine stone and the like substances present in flushing water to such surfaces in a urinal, upon which it has an adverse effect on the operation of sensors.
  • the solution of the invention is capable of prolonging the service life of sensors, as well as of reducing the maintenance demand for sensors.
  • the solution of the invention is capable of improving the flushing reliability of a urinal, which refers to the fact that the demand for flushing the urine arriving in a urinal is detected and performed at a proper time.
  • a urinal can be fitted with sensors capable of detecting the need for flushing the urinal.
  • Fig. 1 depicts by way of example possible alternative locations for sensors and respective vibrators to be included in a urinal 10 and its water seal 11.
  • the sensors are mounted outside the urinal 10 or the water seal 11, as shown at 12a; 12b.
  • One sensor suitable for such an arrangement comprises for example a temperature sensor, which is sufficiently sensitive to detect a temperature change effected at the surface of the urinal 10 or the water seal 11 by urine coming in the urinal 10.
  • the urinal 10 or the water seal 11 can have the thickness of its surface reduced over the area in line with the sensor.
  • a reduction of the wall thickness can be used for enhancing thermal conductivity through the surface of the urinal 10 or the water seal 11, whereby the sensor shall detect a need for flushing even more readily.
  • the accumulation of urine stone within the area of the urinal 10 or the water seal 11 directly in line with the sensor can be ruled out by setting a vibrator in the immediate vicinity of a sensor location.
  • the vibrator can be e.g. a piezoelectric crystal or the like element, which is supplied with a signal at a proper frequency for the creation of vibration. According to an embodiment not forming part of the invention, the vibrator is set in action as the flushing of the urinal 10 is started.
  • the vibrator vibrates at a given frequency, the waves in flushing water produced by said vibrator flushing the internal surface of the urinal 10 or the water seal 11 over the area in line with the sensor, thus preventing the adherence of urine stone to the wall of the urinal 10 or the water seal 11 in the area in line with the sensor.
  • sensors measuring the flushing demand for the urinal 10 are mounted on an internal surface 12c; 12d of the urinal 10 and the water seal 11, preferably in a liquid basin.
  • sensors may comprise for example sensors based on electrical conductivity, which are responsive to the change of electrical conductivity brought about by urine in a liquid present in the urinal 10.
  • sensors can be mounted for example on the urinal 10 or the water seal 11 at such a location that the sensors inevitably come to contact with the liquid present in the urinal 10.
  • the adherence of urine stone to sensors can be avoided in such a way that a vibrator is provided in the immediate vicinity of the sensors for preventing urine stone and the like impurities from adhering to the surface of the sensor or sensors. It is obvious for a skilled person that there may be several vibrators if there are several measuring sensors or the latter are located far apart, in which case a single vibrator is insufficient for keeping said sensors clean. It is also possible to provide a single sensor with several vibrators. According to one embodiment not forming part of the invention, the vibrators can be integrated with a sensor in a common element, as a consequence of which the vibrator prevents urine stone from adhering to the sensor element by setting said element in vibration at a sufficiently high frequency.
  • a piezoelectric crystal functions as a sensor that detects a need for flushing the urinal 10.
  • the piezoelectric crystal is arranged to detect a need for flushing the urinal 10 as a result of vibration produced by urine arriving in the urinal 10.
  • the piezoelectric crystal generates a signal transmitted to a flush-control microprocessor or the like, which uses the signal level to determine a need for flushing.
  • the signal level is preferably arranged to be such that the need for unnecessary flushes can be minimized.
  • a piezoelectric crystal serving as a sensor By using a piezoelectric crystal serving as a sensor, it is possible to implement a flushing of the sensor in a particularly preferred manner, such that the same piezoelectric crystal is used as a vibrator by supplying it for example with a high-frequency signal, thereby removing contamination from the sensor surface. It is obvious for a person skilled in the art that the proposed piezoelectric crystal serving as a sensor can be positioned inside either the urinal 10 or the water seal 11.
  • a piezoelectric crystal is coupled with the microprocessor.
  • the piezoelectric crystal functions both as a sensor and a vibrator.
  • said piezoelectric crystal is connected over an A/D-converter of the processor, wherein a possible sensor-emitted signal is worked into a digital signal which is compared to a reference level previously fed into the microprocessor, said comparison being used as a basis for a command to perform a flush.
  • the piezoelectric crystal can be supplied with a high-frequency signal for creating vibration.
  • the piezoelectric crystal vibrates at a sufficiently high frequency, the impurities dislodge off the sensor surface while the adherence of new impurities can be prevented at the same time.
  • the sensitivity of the sensors is maintained longer and the urinal 10 can be improved in terms of its flushing reliability. It is obvious for a skilled person that, if the vibrator is constituted by an element separate with respect to the sensor and positioned in the immediate vicinity of the sensor, the vibrator can be used for flushing the sensor wall with flushing water to thereby remove dirt accumulated on the sensor surface.
  • Fig. 2 shows an entire flushing cycle in the form of a simple flow chart presentation.
  • the system is in a measuring mode 21, wherein signals coming from a sensor are being read by a microprocessor and compared with a previously set threshold value.
  • the microprocessor detects a need for flushing 22.
  • the microprocessor issues a command for urinal flushing 23.
  • the microprocessor preferably issues a command for a vibrator to start vibration 24 for cleaning the sensor surface of dirt possibly accumulated thereon. This is followed by returning to the normal measuring mode 21.
  • the illustrated flow chart is by no means the only solution for an operating cycle of urinal flushing.
  • the signal delivered to a vibrator for starting vibration is timed in such a way that, according to one preferred embodiment, it does not begin until the flushing has started.
  • the timing of vibration can be adjusted as desired for example programmatically by means of a microprocessor.
  • the useful sensors are not limited to those described above, as the sensors may comprise any sensor configuration whatsoever fit for recognizing a need for flushing a urinal, which are linked with a vibrator of the invention for keeping the sensor clean.
  • the locations of sensors and vibrators in a urinal and its water seal are not fixed, as such locations depend on various factors, such as the shape of a urinal, the sensitivity and type of sensors, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)

Claims (6)

  1. Verfahren zur Aufrechterhaltung der verlässlichen Funktion eines Sensors zur Bestimmung der Notwendigkeit ein Urinal (10) zu spülen, wobei Urinstein und/oder anderer derartiger Schmutz, der auf der Sensorfläche im Inneren des Flüssigkeitsbeckens des Urinals (10) anhaftet, mit Hilfe eines piezoelektrischen Kristallschwingers auf der besagten Fläche entfernt wird, wobei der piezoelektrische Kristallschwinger auch als Sensor fungiert.
  2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass der piezoelektrische Schwinger gleichzeitig zu einer Spülung der Sensoroberfläche mit Wasser in Betrieb ist.
  3. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass Urinstein und/oder anderer derartiger Schmutz mit Hilfe von Ultraschall entfernt wird, der durch den piezoelektrischen Schwinger erzeugt wird.
  4. Einrichtung mit einem Sensor in einem Urinal und mit Mitteln zur Aufrechterhaltung einer zuverlässigen Funktion eines Sensors zur Bestimmung der Notwendigkeit ein Urinal (10) zu spülen, wobei diese einen piezoelektrischen Kristallschwinger umfasst, der zur Entfernung von Urinstein und/oder anderem derartigen Schmutz, der auf dem Sensor im Inneren des Flüssigkeitsbeckens des Urinals (10) anhaftet, dient, wobei der piezoelektrische Kristallschwinger auch als Sensor fungiert.
  5. Einrichtung gemäß Anspruch 4, dadurch gekennzeichnet, dass der Schwinger für den Einbau in einer Wasserdichtung (11) vorgesehen ist.
  6. Einrichtung gemäß Anspruch 4, dadurch gekennzeichnet, dass der Schwinger zum Anbringen an einer Innenfläche des Urinals (10) vorgesehen ist.
EP00660082A 1999-05-07 2000-05-04 Verbesserung bezüglich der Spülzuverlässigkeit eines Urinals Expired - Lifetime EP1050633B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI991056A FI106571B (fi) 1999-05-07 1999-05-07 Urinaalin huuhtelun luotettavuuden parantaminen
FI991056 1999-05-07

Publications (3)

Publication Number Publication Date
EP1050633A2 EP1050633A2 (de) 2000-11-08
EP1050633A3 EP1050633A3 (de) 2001-09-26
EP1050633B1 true EP1050633B1 (de) 2003-04-16

Family

ID=8554621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00660082A Expired - Lifetime EP1050633B1 (de) 1999-05-07 2000-05-04 Verbesserung bezüglich der Spülzuverlässigkeit eines Urinals

Country Status (5)

Country Link
EP (1) EP1050633B1 (de)
AT (1) ATE237719T1 (de)
DE (1) DE60002116T2 (de)
ES (1) ES2195849T3 (de)
FI (1) FI106571B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20040212A1 (it) * 2004-04-09 2004-07-09 Ceramica Flaminia S P A Gruppo di scolo dell'acqua per componenti sanitari

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893361A (en) * 1987-12-22 1990-01-16 Burns Paul H Drain trap ultrasonic vibration cleaning apparatus
US5035140A (en) * 1988-11-03 1991-07-30 The Boeing Company Self cleaning liquid level detector
JPH04366241A (ja) * 1991-06-14 1992-12-18 Honda Electron Co Ltd 超音波便器
DE4306457C2 (de) * 1993-03-02 1997-01-16 Juergen Kuhfus Urinal mit Spüleinrichtung
FI99265C (fi) 1996-03-27 1998-02-10 Oras Oy Menetelmä ja laite urinaalin huuhtelemiseksi
US5889209A (en) * 1997-12-18 1999-03-30 The Regents Of The University Of California Method and apparatus for preventing biofouling of aquatic sensors

Also Published As

Publication number Publication date
ES2195849T3 (es) 2003-12-16
FI991056A0 (fi) 1999-05-07
FI991056A (fi) 2000-11-08
EP1050633A3 (de) 2001-09-26
EP1050633A2 (de) 2000-11-08
DE60002116D1 (de) 2003-05-22
DE60002116T2 (de) 2004-02-05
ATE237719T1 (de) 2003-05-15
FI106571B (fi) 2001-02-28

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