EP1522251A2 - Lave-vaisselle avec commande électronique - Google Patents

Lave-vaisselle avec commande électronique Download PDF

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Publication number
EP1522251A2
EP1522251A2 EP04020105A EP04020105A EP1522251A2 EP 1522251 A2 EP1522251 A2 EP 1522251A2 EP 04020105 A EP04020105 A EP 04020105A EP 04020105 A EP04020105 A EP 04020105A EP 1522251 A2 EP1522251 A2 EP 1522251A2
Authority
EP
European Patent Office
Prior art keywords
cleaning machine
machine according
washing
secondary coil
insert
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
EP04020105A
Other languages
German (de)
English (en)
Other versions
EP1522251A3 (fr
EP1522251B1 (fr
Inventor
Karl Heinz Dr. Annecke
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.)
BHT Hygienetechnik GmbH
Original Assignee
BHT Hygienetechnik GmbH
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 BHT Hygienetechnik GmbH filed Critical BHT Hygienetechnik GmbH
Publication of EP1522251A2 publication Critical patent/EP1522251A2/fr
Publication of EP1522251A3 publication Critical patent/EP1522251A3/fr
Application granted granted Critical
Publication of EP1522251B1 publication Critical patent/EP1522251B1/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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention
    • 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
    • A47L15/46—Devices for the automatic control of the different phases of cleaning ; Controlling devices
    • 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
    • D06F34/16—Imbalance
    • 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
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/30—Variation of electrical, magnetical or optical quantities
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/26—Indication or alarm to the controlling device or to the user

Definitions

  • the invention relates to a cleaning machine according to the preamble of claim 1.
  • Such a cleaning machine is known from DE 44 38 036 C2 known.
  • Cleaning machines have a wet area, usually is called a washroom and one of them waterproof separate dry area, in which inter alia a mostly electronic control of the machine and more Aggregates, such as pumps, valves and the like, are located.
  • a washroom waterproof separate dry area
  • Aggregates such as pumps, valves and the like
  • To control and monitor the operation of the cleaning machine it is desirable to have certain physical To measure or sense sizes within the washroom, For example, the speed of a rotatable spray arm, the exiting by pressurized washing liquid in rotary motion is offset, the speed of a metering pump, a rotatable drum for cleaning hoses etc.
  • Cleaning machines especially dishwashers have such Spray arms (called rotating arms) whose rotation the cleaning result significantly influenced, namely by the fact of whether cleaning fluid from the swing arms exit and thus the objects to be cleaned evenly be sprayed.
  • rotating arms whose rotation the cleaning result significantly influenced, namely by the fact of whether cleaning fluid from the swing arms exit and thus the objects to be cleaned evenly be sprayed.
  • this is not the case, be it through clogged Nozzles on the swivel arms, due to incorrect loading of the dishwasher with objects in the rotation range of the rotary arms protrude and block their rotation with it, through increased friction of the bearing of the rotating arms, by easing the performance of a circulating pump, due to too little water in the Detergent cycle or by foaming in the cleaning fluid.
  • the rotational movement of the rotary arms to monitor.
  • the said DE 44 38 036 C2 before, the pivot bearing of the rotary arm with to arrange an axial extension in the wet area, wherein the extension means a transmitter (e.g., metal cams, Resonant circuit, etc.) whose signals are connected to a Receiving device (reed contact, proximity switch, Hall sensor etc.) are sensed in the wet or dry area.
  • a transmitter e.g., metal cams, Resonant circuit, etc.
  • DE 40 10 066 A1 proposes different rotating arms the cleaning machine with different water pressure to apply so that they with different rotational speed operate. From here and out of the the rotary arms leaking rinsing fluid are respectively produces different sounds that are characteristic Frequency ranges lie.
  • a microphone which Outside the washroom is located first recorded the noise generated on the washroom inner wall and then with the help of an electronic filter the characteristic frequency ranges from the signal mixture screened. An analysis of the remaining signals allows conclusions about the rotational behavior of the rotating arms.
  • a fundamental problem with rotary arm rotation monitoring is that the rotating arms in many cleaning machines, in particular for the cleaning of medical Appliances are used, not fixed in the wash chamber are attached but are located on washing inserts, equipped with the objects to be cleaned and in the Washing chamber of the machine can be used. At almost Each type of washing insert is located on the rotating arms another position.
  • the receiving means e.g. Pressure sensors, Microphones or the like at a fixed position arranged in or outside the wash chamber, resulting in the Use of washing inserts, each with different arranged rotary arms is not possible.
  • the object of the invention is therefore, the cleaning machine of the type mentioned above to improve that monitoring of movements of aggregates is possible even if these are in different positions in the washroom the cleaning machine are arranged.
  • the basic principle of the invention is sensors for monitoring the movement of aggregates on the wash insert to install. From this arises then the consequence problem the transmission of the sensor signals from the respective washing application to control the cleaning machine that is outside located in the washroom, so the wet area of the machine to the dry area.
  • a galvanic coupling between the sensors and an evaluation circuit through contacts, Plug, etc. is due to the in the wash chamber prevailing humidity and temperature effects to exclude because of the high susceptibility to interference.
  • the invention therefore proposes a galvanically isolated coupling.
  • an electromagnetic coupling with used two coils.
  • the primary coil is outside the washroom in the dry area or in waterproof Execution in the washroom (wet area) and is connected to an oscillator connected.
  • the secondary coil is on the wash in the wet area and is with one or more likewise arranged on the washing insert sensors connected.
  • the sensors are, for example, reed contacts, operated by attached to the aggregates magnets become. Every time a magnet passes the reed contact, the reed switch is closed intermittently and reopened, causing the secondary coil for a short time shorted. This acts via the primary coil the oscillator back, thereby at least one of his Parameters, e.g. Frequency, current and / or voltage changes.
  • the change of these parameters is made by an evaluation circuit evaluated to the effect that the number of closing or Opening operations of the switches per unit time determined become.
  • the number of closing and opening operations depends thereby of the number of aggregates and their rotation speed These values are each characteristic of individual washing inserts are.
  • When blocking individual Aggregates or too low speed decreases the number of Closing and opening operations of the switch under a predetermined threshold value and it will trigger an alarm.
  • sensors other types of sensors can be used be such.
  • the aggregates or rotating arms usually rotate asynchronously to each other, so that only relatively rarely overlaps of pulses occur, i.e. that simultaneously several switches open or close. From the total number of pulses can then be determined whether one or more of the aggregates or rotating arms not turn it correctly. Possibly occurring overlaps can be eliminated by a correction factor. Also exists the possibility of a larger number of aggregates or swivel arms to combine them into several groups, then each group has a pair of coils and an oscillator assigned. Of course, also individual Aggregates, such as e.g. Swivel arms to be monitored.
  • the secondary coil on the wash rack by an additional Capacity to a series or parallel resonant circuit formed, which resonates with the frequency of the oscillator stands. As a result, the sensitivity is increased.
  • any rotational movements of rotary arms be detected but any rotational movements of itself moving or rotating parts in the washroom, e.g. a rotating washing drum for cleaning medical Hoses, as known from DE 31 43 005 C2 is.
  • any type of opening or closing operations or pulses generated on the wash insert be transferred to the control of the machine.
  • Sensors can pressure switch, flow meter, flow meter or something similar.
  • the washing carrier an identification device provided For example, a magnetic reader and a magnetic coding on the washstand. Because different washbasins too different number of swivel arms or rotating Sharing, this information is the evaluation to transmit this information during the evaluation considered.
  • the evaluation device preferably gives an alarm signal off if it is determined that one or more rotating arms do not turn with the expected speed.
  • Fig. 1 Even if in the following Embodiment is referred to rotary arms, so it should be expressly noted that with the invention the movement of any aggregates can be detected.
  • Such Aggregates can be: rotary arms, washing drums, pumps, Flaps, sliders, valves, door handles moved into the washroom or similar.
  • a washing insert 1, for example a task basket is, with the objects to be cleaned is charged and in a laundry room of a cleaning machine is inserted, has several spray arms or rotating arms D1 ... Dn rotatable on one or more axes of rotation A. are stored.
  • rotary arms have in a known manner not shown spray nozzles from which cleaning fluid escapes under pressure, causing the respective rotary arm is put into a rotary motion.
  • a magnet M1 ... Mn attached to which a reed switch K1 ... Kn is assigned.
  • a reed switch K1 ... Kn is assigned.
  • This switch does not, for example, on short closing followed by re-opening of the reed contact be.
  • the Reed contact is normally closed and passing by of the magnet opens briefly. All reed contacts K1 ... Kn are connected in parallel and with a secondary coil L2 connected.
  • the secondary coil L2 may be a capacitor C1 be connected in parallel or alternatively a capacitor C2 in series with a terminal of the secondary coil L1 lie, whereby a resonant circuit is formed on Resonance frequency is tuned with an oscillator.
  • Each wash insert 1 additionally has a coding 2, for example in the form of a magnetic coding, where in Interior of the washroom, in which the washing insert 1 is inserted is a reading device 3 is located, the corresponding Code reads and thus a signal for a laundry insert identification which supplies a control 6 of the Cleaning machine is supplied.
  • a coding 2 for example in the form of a magnetic coding
  • the secondary coil L2 is connected via an air gap Sp with a Primary coil L1 coupled.
  • the primary coil (L1) can in watertight execution located in the washroom or also outside the washroom in the drying room, in which case between primary coil (L1) and secondary coil (L2) a window made of non-magnetic material.
  • the primary coil (L1) is connected to an oscillator 4 and forms along with this one resonant circuit, over the coupling through the air gap Sp also coupled to the secondary coil L2 is. Both coils L1 and L2 are thus components a resonant circuit with the oscillator 4. Changes at least one of the switches K1 ... Kn its switching state, so acts This also applies to the resonant circuit of oscillator 4 and Primary coil L1 off.
  • the secondary coil L2 is short-circuited.
  • This changes at least one parameter of said resonant circuit for example the frequency thereof and / or its power consumption or its current or its tension.
  • This process can be done by a frequency evaluation circuit 5 are detected and sent to the controller 6 of the machine are reported, at an output 6a emits an error signal or aborts the cleaning process initiates.
  • the error signal may be, for example be issued optically or acoustically or in one Cleaning protocol to be printed.
  • the frequency evaluation 5 can also an evaluation circuit 7 for the evaluation of others Parameters of the oscillator 4, e.g. its power consumption, its current or its voltage, be provided which also reports its evaluation result to the control 6. Via additional outputs 9, the evaluation result can also otherwise be output, be it as an error signal or as a cleaning protocol.
  • Parameters of the oscillator 4 e.g. its power consumption, its current or its voltage
  • FIG. 2 shows a block diagram of an evaluation circuit.
  • one or more switches K1 are parallel connected to the secondary coil L2.
  • a series connection a resistor R5 and the primary coil L1 is between Supply voltage Vcc and ground.
  • Parallel to the primary coil L1 is the oscillator 4.
  • a first Low pass Tp1 connected, whose output is connected to the non-inverting Input of a comparator 10 is connected.
  • the output of the first low pass Tp1 is via a second Lowpass Tp2 with the inverting input of the comparator 10 connected.
  • the first low-pass filter Tp1 smoothes the at the primary coil L1 falling voltage, so that the oscillator frequency is not into the measurement.
  • the output signal of the second Low-pass filter whose cut-off frequency is lower than that of the first low-pass filter, serves as a reference voltage for the comparator 10. With switched switch K1 the output voltage of the low-pass filter Tp1 is larger than that of the low-pass filter Tp2, so that the comparator 10th turns on and outputs a high level at its output.
  • Fig. 3 shows a more detailed circuit diagram of the circuit according to Fig. 2.
  • the primary coil L1 is here in two sub-coils Split L11 and L12.
  • the primary coil L1 and the secondary coil L2 are each in two sub-coils L11, L12 and L21, Split L22.
  • the respective partial coils can be spatially be separated from each other and are in pairs associated with each other, so electromagnetically via an air gap coupled with each other, so L11 with L21 and L12 with L22.
  • a first terminal of the first partial coil L11 is with a first capacitor C1, whose second terminal with a series connection of a resistor R2, a collector-emitter path of a transistor T1 and a resistor R1, the latter with ground connected is.
  • the base of the transistor T1 is located at a Voltage dividers from resistors R3 and R4.
  • the resistance R4 is connected to ground and resistor R3 is connected via a another resistor R5 with supply voltage Vcc.
  • One Connection of the second partial coil L12 is via a capacitor C2 is connected to the base of the transistor T1.
  • the second Connection of the partial coil L12 is grounded.
  • the two partial coils L11 and L12, the capacitors C1 and C2, the resistors R1 to R4 and the transistor T1 form a Meissner oscillator whose output is the first connection the first sub-coil L11 is. This output is via a Capacitor C3 connected to ground, where the resistance R5 and the capacitor C3 form the first low-pass filter TP1.
  • the common connection point between the resistor R5 and the capacitor C3 form the output of the first Low pass TP1 and is connected via a capacitor C4 with the non-inverting input of the comparator 10 connected and via a resistor R6 to ground.
  • the capacitor C4 and the resistor R6 form a high pass whose Output the common connection point between the capacitor C4 and resistor R6.
  • the output of this High pass is via a series connection of a resistor R7 and a capacitor C5 connected to ground, wherein the common connection point between the resistor R7 and the capacitor C5 with the inverting input the comparator 10 is connected.
  • the resistor R7 and the capacitor C5 form the second low-pass filter TP2, its output as a reference voltage for the inverting Input of the comparator 10 is used. At the output of the comparator 10 then appear in connection with FIG. 2 explained Switching pulses.
  • TP1 is 100 Hz.
  • the capacitor C4 and the resistor R6 form a high-pass HP whose filtered Output signal at the non-inverting input of the Comparator 10 and at the entrance of the second low pass R7 and C5 (TP2).
  • the cutoff frequency of the high pass For example, HP is 10 Hz and that of the second low pass TP2 at 1 Hz.
  • the output signal of the second low-pass filter TP2 serves as a reference voltage at the inverting input of the comparator 10.
  • the oscillator frequency is in this case in the order of 120 kHz.
  • the coil L11 is included direct component of the oscillator and with the feedback coil L12 inductively coupled. This causes the Power consumption of the oscillator when closing the switch becomes smaller, since the positive feedback decreases, so that the voltage at the output of the first low-pass filter Tp1 increases.
  • the following high-pass filter is only for direct current separation of the signal, so that only the alternating component at the comparator is evaluated.
  • the first low-pass filter thus essentially serves for suppressing the oscillator frequency, the high-pass filter for suppressing the DC component and the second Low-pass filter for automatic long-term stable generation of a Reference value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Slot Machines And Peripheral Devices (AREA)
EP04020105A 2003-10-10 2004-08-25 Lave-vaisselle avec commande électronique Expired - Lifetime EP1522251B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10347835A DE10347835B4 (de) 2003-10-10 2003-10-10 Reinigungsmaschine
DE10347835 2003-10-10

Publications (3)

Publication Number Publication Date
EP1522251A2 true EP1522251A2 (fr) 2005-04-13
EP1522251A3 EP1522251A3 (fr) 2009-05-13
EP1522251B1 EP1522251B1 (fr) 2010-12-29

Family

ID=34306400

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04020105A Expired - Lifetime EP1522251B1 (fr) 2003-10-10 2004-08-25 Lave-vaisselle avec commande électronique

Country Status (3)

Country Link
EP (1) EP1522251B1 (fr)
AT (1) ATE493058T1 (fr)
DE (2) DE10347835B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011062790A3 (fr) * 2009-11-18 2011-08-04 Premark Feg L.L.C. Procédé de fonctionnement d'un lave-vaisselle et lave-vaisselle

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005033110B4 (de) * 2005-07-15 2011-05-19 Miele & Cie. Kg Spülmaschine
DE102005059604B3 (de) * 2005-12-12 2007-03-22 Bht Hygienetechnik Gmbh Verfahren zur Überwachung einer Drehbewegung von Dreharmen einer Reinigungsmaschine und Reinigungsmaschine zur Durchführung des Verfahrens
DE102010051524A1 (de) * 2010-11-16 2012-05-16 Belimed Ag Rotations-Überwachung für die Wascharme eines mehretagigen Waschgut-Aufnahmewagens
DE102013226637A1 (de) 2013-12-19 2015-06-25 Meiko Maschinenbau Gmbh & Co. Kg Reinigungsvorrichtung und Verfahren zur Reinigung von Reinigungsgut
DE102022004275A1 (de) 2022-11-19 2024-05-29 Robert Simmoteit Filtervorrichtung und Dreharmantrieb

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1136460B (it) * 1980-11-28 1986-08-27 Zanussi Zeltron Inst Lavastoviglie con dispositivo di controllo della rotazione dei mulinelli
DE3143005C2 (de) * 1981-10-29 1984-03-22 BHT Hygiene-Technik GmbH, 8000 München Spülmaschine
DE4010066C2 (de) * 1990-03-29 1997-11-27 Miele & Cie Verfahren zur Überwachung der Sprüharmrotation bei einer Geschirrspülmaschine
DE4018048A1 (de) * 1990-06-06 1991-12-12 Licentia Gmbh Geschirrspuelmaschine
DE4020898A1 (de) * 1990-06-30 1992-01-02 Licentia Gmbh Geschirrspuelmaschine mit einem sprueharm
IT1253942B (it) * 1991-09-26 1995-09-05 Zanussi Grandi Impianti Spa Dispositivo di controllo dei cicli di lavaggio e di risciacquo per macchina lavastoviglie.
DE4438036C2 (de) * 1994-10-25 1996-08-14 Bauknecht Hausgeraete Geschirrspülmaschine mit einem Spülwasser-Kreislauf
DE19732856C2 (de) * 1997-07-30 2000-05-18 Bht Hygiene Technik Ing H Bier Reinigungsmaschine und Überwachungsverfahren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011062790A3 (fr) * 2009-11-18 2011-08-04 Premark Feg L.L.C. Procédé de fonctionnement d'un lave-vaisselle et lave-vaisselle

Also Published As

Publication number Publication date
DE502004012048D1 (de) 2011-02-10
EP1522251A3 (fr) 2009-05-13
ATE493058T1 (de) 2011-01-15
DE10347835A1 (de) 2005-05-12
DE10347835B4 (de) 2006-02-09
EP1522251B1 (fr) 2010-12-29

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