EP1297780A2 - Dispositif avec détecteur de turbidité pour un lave-vaisselle ou une machine à laver - Google Patents

Dispositif avec détecteur de turbidité pour un lave-vaisselle ou une machine à laver Download PDF

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Publication number
EP1297780A2
EP1297780A2 EP02020110A EP02020110A EP1297780A2 EP 1297780 A2 EP1297780 A2 EP 1297780A2 EP 02020110 A EP02020110 A EP 02020110A EP 02020110 A EP02020110 A EP 02020110A EP 1297780 A2 EP1297780 A2 EP 1297780A2
Authority
EP
European Patent Office
Prior art keywords
line
bypass line
flow
turbidity sensor
section
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.)
Granted
Application number
EP02020110A
Other languages
German (de)
English (en)
Other versions
EP1297780B1 (fr
EP1297780A3 (fr
Inventor
Andre Bertram
Erik Ekelhoff
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Publication of EP1297780A2 publication Critical patent/EP1297780A2/fr
Publication of EP1297780A3 publication Critical patent/EP1297780A3/fr
Application granted granted Critical
Publication of EP1297780B1 publication Critical patent/EP1297780B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/20—Washing liquid condition, e.g. turbidity

Definitions

  • the object of the invention relates to a device for preventing foam or Air bubbles accumulation in the measuring zone, especially in the rinse water circuit Dishwasher or washing machine arranged turbidity sensor, the Measuring zone with the turbidity sensor in an air bubble separator Line path of the rinsing liquid is arranged.
  • the Applicant has already proposed the circulating rinsing liquid within a measuring zone to transport with calm flow.
  • the measuring zone is in one with the turbidity sensor arranged horizontally running route of the rinsing liquid, which is based on the horizontal level is continuously expanding upwards and a for the liquid flow Calming section forms. Air bubbles can form in the flow-calmed room Collect the level above the measuring zone and be carried away with the flow.
  • the invention has for its object a foam or air bubbles in the To effectively prevent rinsing liquid in the area of the turbidity sensor and the Support the transport of dirt particles directly through the measuring location.
  • the rinsing liquid to be sensed for turbidity on its way to the measuring zone advantageously a separation of foam and / or air bubbles from the liquid in the Area of the measuring zone reached.
  • the transportation of in the Particle residues located in the rinsing liquid towards the measuring point through the light downward sloping bottom part of the bypass line is cheaply supported. In particular, this is for the Further transport of heavier particles, such as B. Sand is an advantage.
  • the optimal separation of foam or air bubbles as well as particle residues in the measuring zone simplifies the Signal evaluation essential for turbidity measurement.
  • FIG. 1 shows a perspective view of a device (1) with a turbidity sensor (2) for the detection of rinse water cloudiness, which is particularly the case with a program-controlled dishwasher can be used.
  • a turbidity sensor (2) for the detection of rinse water cloudiness
  • the dishwashing program run of a dishwasher or turbidity sensors Washing machine can be optimized in a conventional manner. Precondition for an exact It is turbidity value measurement that foam and Air bubbles are separated from the dirt particles in the rinsing water and not from the Turbidity sensor (2) can be detected.
  • the aforementioned device (1) is therefore According to the invention designed as an air or bubble separator.
  • the device (1) has a measuring zone (3) with the turbidity sensor (2) Bypass line (4), which has a horizontally laid main line path (5) for the Rinsing liquid is connected in parallel. Both the bypass line (4) and the The main line path (5) is each designed to have a calm flow.
  • the management of the from Main line path (5) branching bypass line (4) is preferably circular or arched, but could also be laid at angles.
  • the bypass line (4) is with itself flow cross-section (Q) which increases continuously upwards and downwards. Which forcing the flow cross-section (Q) of the bypass to increase continuously upwards and downwards a flow calming in the branched rinsing liquid to be sensed for turbidity.
  • the main line path (5) is designed as a diffuser (6) to calm the flow (see also Fig. 2 and 3), which opens before the in the main route (5) Bypass line ends is arranged.
  • the intended bypass line end is in the flow direction (see arrows, Fig. 1 and 2) Flushing liquid seen behind the line outlet (4b) of the bypass line (4) on the diffuser (6) arranged.
  • the Bypass line (4) and the main line path (5) lie in one level (7).
  • the device (1) is, as shown in Fig.
  • the flow cross section (Q) of the bypass line (4) increases the horizontal plane (7) of the bypass line (4) in the flow direction approximately V or wedge-shaped.
  • the cross-sectional profile in the flow path forms the branched one Flushing liquid a calm zone for the transport of air or foam bubbles (10) on the upper wedge (8) and a zone in the area of the lower wedge (9)
  • Bypass line (4) for separate transport of particle residues (11) in the Rinsing liquid must be carried.
  • the measuring zone (3) with the turbidity sensor (2) is the largest Flow cross-section (Q) of the bypass line (4) near the bottom of the lower wedge slope (9) arranged below the plane (7) of the transported air bubbles (10).
  • the openings (4a, 4b) the bypass line ends are each connected to the diffuser (6) with recesses (12; 13) expanded to reduce vortex flow.
  • the recesses (12; 13) are 1 and 2 advantageously formed staircase, but can also be trapezoidal or be inclined or any other design.
  • the main route (5) widens in the diffuser (6) from a circular entrance cross section (14) into a rectangular one Cross-section and is reduced to a round at the end of the cable Output cross section (15).
  • Fig. 2 shows the flow of the flushing liquid through the main line path (5).
  • the Flow is behind the circular inlet cross-section (14) of the device (1) through the Diffuser (6) expanded to approximately twice the cross-section, the Flow rate cut in half.
  • the operation of the device (1) is as follows understand:
  • the measuring zone (3) works free of any air and Foam bubbles and can therefore optimally sense the turbidity of the liquid, the Particle residues can also be recognized as such.
  • the air (10) carried in the bypass line (4) flows past outside of the turbidity sensor (2) and therefore remains as intended unconsidered.
  • the invention uses the principle of slowing the flow of liquid in the transported rinsing liquid enclosed air and foam bubbles (10) in a to displace the dirt line (11) lying upper line area (8), this through buoyancy.
  • the air bubbles move in a calming distance and have even with full circulation pump output or maximum flushing water flow sufficient time to separate from the particle residues before the turbidity measurement.
  • This is in the device (1), as described, according to the invention by a multiple Reduction in flow velocity achieved.
  • Bypass line (4) Rinsing off any residual dirt that may have accumulated after multiple rinsing program runs
  • Bypass line (4) with a normally closed flushing connection (not shown in more detail) be provided. This connection is then used to rinse out dirt particles for example, connected to the fresh water line or the like.
  • the device (1) described here for a program-controlled dishwasher is equally applicable to a washing machine that can be controlled by a device program.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP02020110A 2001-09-21 2002-09-07 Lave-vaisselle ou machine à laver avec dispositif avec détecteur de turbidité Expired - Lifetime EP1297780B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10146641 2001-09-21
DE10146641A DE10146641C1 (de) 2001-09-21 2001-09-21 Einrichtung mit einem Trübungssensor für eine Geschirrspülmaschine oder Waschmaschine

Publications (3)

Publication Number Publication Date
EP1297780A2 true EP1297780A2 (fr) 2003-04-02
EP1297780A3 EP1297780A3 (fr) 2006-04-12
EP1297780B1 EP1297780B1 (fr) 2007-03-07

Family

ID=7699848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02020110A Expired - Lifetime EP1297780B1 (fr) 2001-09-21 2002-09-07 Lave-vaisselle ou machine à laver avec dispositif avec détecteur de turbidité

Country Status (4)

Country Link
EP (1) EP1297780B1 (fr)
AT (1) ATE356350T1 (fr)
DE (2) DE10146641C1 (fr)
ES (1) ES2280463T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10319467B3 (de) 2003-04-29 2004-07-22 Miele & Cie. Kg Einrichtung mit einem Trübungssensor für eine Geschirrspülmaschine oder Waschmaschine
EP2708636A1 (fr) * 2012-09-14 2014-03-19 Electrolux Home Products Corporation N.V. Appareil avec dispositif de guidage de liquide
DE102018205502A1 (de) * 2018-04-11 2019-10-17 E.G.O. Elektro-Gerätebau GmbH Sensorvorrichtung und Verfahren zur Untersuchung einer Flüssigkeit und Waschmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140168A (en) * 1990-12-03 1992-08-18 Great Lakes Instruments, Inc. Turbidimeter signal processing circuit using alternating light sources
JPH05154278A (ja) * 1991-12-03 1993-06-22 Matsushita Electric Ind Co Ltd 洗濯機の濁度検知装置
US5331177A (en) * 1993-04-26 1994-07-19 Honeywell Inc. Turbidity sensor with analog to digital conversion capability
DE19705927A1 (de) * 1997-02-17 1998-08-20 Aeg Hausgeraete Gmbh Geschirrspülmaschine mit einer Einrichtung zum Ermitteln des Verschmutzungsgrades einer Spülflüssigkeit
DE10059112C1 (de) * 2000-11-28 2002-05-08 Miele & Cie Geschirrspülmaschine mit einer Einrichtung zur Verhinderung einer Schaum- oder Luftblasenansammlung in der Messzone eines Trübungssensors

Also Published As

Publication number Publication date
EP1297780B1 (fr) 2007-03-07
ES2280463T3 (es) 2007-09-16
ATE356350T1 (de) 2007-03-15
DE10146641C1 (de) 2002-12-12
DE50209638D1 (de) 2007-04-19
EP1297780A3 (fr) 2006-04-12

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