EP1510610B1 - Procédé pour vérifier le fonctionnement des valves dans un appareil ménager utilisant de l'eau - Google Patents

Procédé pour vérifier le fonctionnement des valves dans un appareil ménager utilisant de l'eau Download PDF

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Publication number
EP1510610B1
EP1510610B1 EP20040015415 EP04015415A EP1510610B1 EP 1510610 B1 EP1510610 B1 EP 1510610B1 EP 20040015415 EP20040015415 EP 20040015415 EP 04015415 A EP04015415 A EP 04015415A EP 1510610 B1 EP1510610 B1 EP 1510610B1
Authority
EP
European Patent Office
Prior art keywords
water
valve
valves
control valve
measurement values
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
EP20040015415
Other languages
German (de)
English (en)
Other versions
EP1510610A3 (fr
EP1510610A2 (fr
Inventor
Edwin Bolduan
Horst Wiemer
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1510610A2 publication Critical patent/EP1510610A2/fr
Publication of EP1510610A3 publication Critical patent/EP1510610A3/fr
Application granted granted Critical
Publication of EP1510610B1 publication Critical patent/EP1510610B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • 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
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user
    • 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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0402—Cleaning, repairing, or assembling
    • Y10T137/0441—Repairing, securing, replacing, or servicing pipe joint, valve, or tank
    • Y10T137/0452—Detecting or repairing leak

Definitions

  • the invention relates to a method for checking valves in a program-controlled water-conducting household appliance, in particular in a washing machine or a washer dryer, which is equipped with a control valve controlling the water supply, with a measuring device which detects the water flow and a safety feed system which comprises a check valve contains the closing of the water supply in a case of leakage caused by leakage water.
  • a safety device of this kind is out DE 39 17 013 C2 known.
  • the safety hose described there for a hydraulically secured connection of water-conducting household appliances has to shut off the water supply in the event of leakage to a solenoid valve, which is housed in a valve fitting, which is connected directly to the domestic water network.
  • the safety hose is the connection between the household appliance and the domestic water network.
  • the inflow of water via a pressure hose and is controlled by the control valve, which is located in the unit immediately behind the hose connection.
  • the pressure hose is axially spaced surrounded by an enveloping tube, which receives leaking leak water and drains into the household appliance.
  • the shut-off valve on the domestic water network is closed by a switching signal, which is triggered in the event of leakage by a monitoring device in the household appliance.
  • Domestic appliances in which the incoming water still needs to be distributed, contain at least one control valve.
  • the blocking and control valves are hydraulically connected in series.
  • Such a system is safety-related redundant. Before starting the program and after the end of the program both valves are closed. In such an arrangement and this wiring leaks are barely recognizable on one of the two valves. Faults on the check valve, z.
  • the user receives no information as to whether the check valve closes, ie whether the valve functions as an emergency stop switch for the rarely occurring case of leakage water leakage provided and thus can prevent greater damage to the device and the installation space.
  • the shut-off valve belonging to the safety system is opened when the program starts and remains in the open position over the entire program runtime.
  • a leaking check valve has no effect on the program flow of the household appliance and therefore can not be detected in this phase.
  • the program-related water supply during the operation is controlled exclusively via the control valve according to the parameters specified for the respective program section.
  • pressure sensors are usually used, which detect the level in the device.
  • About the level of the water supply is regulated in such a way that when reaching a predetermined upper target level, a signal for closing the arranged in the supply line control valve is generated and that when lowering the water level below a lower switching level, the control valve is opened again.
  • the method controlled in this way can according to DE 39 00 705 C1 be improved when the water inlet is monitored by an idealized inflow curve that matches the machine type. Also in this improved process, the filling process is relatively slow and has the further disadvantage that the inflowing amount of water can not be limited tight enough and thus regularly more water enters than is absolutely necessary for the washing process. In order to be able to limit the amount of water supplied for each program section to the necessary minimum, the amount of incoming water must be able to be determined as precisely as possible and be as tightly tolerated as possible irrespective of the fluctuating pressure conditions in the domestic water network. For this purpose and to accelerate the filling process, flow meters are increasingly being used.
  • DE 195 48 507 A1 and DE 44 02 913 A1 Method for checking valves in a programmatic water-conducting household appliance known.
  • the invention has for its object to provide a method that improves the safety of Improves inlet system described above.
  • the effort to implement the method should be kept to a minimum, in particular, no additional modules or items must be used.
  • this object is achieved by the method according to claim 1.
  • the functionality of the control and the check valve is checked each time the household appliance before, after and / or during the program run.
  • the existing devices for monitoring the incoming water quantity eg. B.
  • the pressure sensor for level monitoring or the flow meter can be obtained during a predetermined water supply phase continuously or at short, fixed predetermined time intervals measured values are recorded by the water flow detecting measuring device that the control valve and the check valve closed one after the other for a short period of time and the change in the measured values is compared by an intelligent evaluation system with a memory-stored setpoint.
  • the schematic in Fig. 1 illustrated washing machine has a leak water safety hose 11, 12, which is connected by means of the screw 13 fixed to the mains connection 10.
  • a corresponding closing signal is supplied to shut off the water inlet via the stop valve 8 arranged immediately behind the mains connection 10.
  • This closing signal is triggered by the monitoring device 4 and passed via the signal line 7, which is guided between the pressure and Hüllschlauch 11 and 12, to the check valve 8.
  • the monitoring device 4 is arranged in the molded in the bottom plate 2 of the washing machine housing 1 trough 3, where the leakage water is collected.
  • the filling of the tub 15 with the laundry drum 16 rotatably mounted therein takes place from the mains connection 10 via the check valve 8, the pressure hose 11, the control valve 9 and the flow meter 5 and is controlled by a control device, not shown.
  • Control valves 9 are required in washing machines because of the distribution required there on several chambers of a Waschstoffein Kunststofftechnikschentechnikschen (not shown here). Such and further subsequently connected components and lines, via which the water flows into the tub 15, are of no importance for the understanding of the method according to the invention and therefore also not shown.
  • the water supply is controlled via the control valve 9 as a function of the water level 18 in the tub 15 via the pressure sensor 17 and / or in dependence on the incoming water through the flow meter 5.
  • control valve 9 and the check valve 8 are closed.
  • the check valve 8 is opened with each program start and remains in the open position until the end of the program.
  • the control valve 9 is open only during the controlled water inlet.
  • the valves 8 and 9 are hydraulically connected in series to check the function before, after or during the program run in a phase in which the drum 16 in the tub 15 is not moved and the control valve 9 is locked according to the program default, the valves are mutually opened and closed and the change in the water level in the tub is detected by the pressure sensor 18.
  • the defective valve 9 or 8 can be identified by a comparison with a memory-stored setpoint, which is determined separately from experiments for each device type.
  • valve 9 For example, initially in the closed position controlled valve 9, the valve 8 briefly in the closed position and even during the closed position of valve 8, the valve 9 is briefly controlled in the open position. If the liquor level in the tub 15 changes significantly, then valve 8 is defective; because it should indeed according to a corresponding Control signal to be closed. In a further test phase, the valve 8 briefly in the open position and even during the open position of valve 8, the valve 9 are briefly controlled in the closed position. If then - during the open position of the valve 8 - the liquor level also changes significantly, the valve 9 is defective, because it should be closed according to an applied closing signal.
  • the method is provided to evaluate the measured values at the flow rate meter 5 in the method described above.
  • the data acquisition via the flow meter 5 provides the guarantee of a significantly improved accuracy and thus a higher certainty, with the help of the method according to the invention a not or not completely closing valve 8 or 9 to diagnose safely even at short closing times. Since the measured values are not distorted by the drum movement, the method can also be carried out during a washing or rinsing phase.
  • FIGS. 2 and 3 A further preferred variant for carrying out the method according to the invention will be described below with reference to the in FIGS. 2 and 3 pictured diagrams.
  • V e is the total volume of water to be introduced for the program section
  • ⁇ V 1 is the amount of water entering over a specific time.
  • the water pressure is assumed to be constant.
  • control valve 9 and the shut-off valve 8 are closed in succession for a short period of time ⁇ t 9 or ⁇ t 8 during a selected water intake phase, and the change in the measured values, which are preferably recorded on the flowmeter 5, is compared with a stored setpoint value via an intelligent evaluation system ,
  • the closing time .DELTA.t for the valves 8 and 9 is to be dimensioned so that at normal water pressure in the supply network, the drop in the water flow in the flow meter can be detected safely.
  • the filling of the tub should be interrupted as briefly as possible, that is, the closing time .DELTA.t should be so narrow that the program duration is not significantly extended overall.
  • the firing time ⁇ t is the boundary conditions prevailing at the time of the functional check, such as, for example, adapted to the water pressure in the domestic water network, controlled automatically.
  • the volume flow ⁇ V is initially measured over the time interval ⁇ t in the selected water inlet phase. This ⁇ V should not fall below a minimum value. The minimum value is determined from tests for each washing machine model and stored as a setpoint in the program memory. If the .DELTA.V / .DELTA.t below the setpoint, the closing time .DELTA.t is incrementally extended by one time unit and the process is repeated.
  • the course of the procedure should be with the help of the diagram in Fig. 3 be clarified.
  • the water intake is much slower in this example, recognizable by the flat course of the intake curve.
  • the reason for this may be a pressure drop due to increased water extraction from the domestic water network or due to a partial interruption in the supply line from the domestic water network.
  • the incoming volume per unit of time ⁇ t can be read with ⁇ V 2 .
  • ⁇ V 2 / ⁇ t is significantly smaller than ⁇ V 1 / ⁇ t in Fig.2 and should be below the specified setpoint in the example.
  • the process automatically controlled by the system is repeated again.
  • the closing time ⁇ t is extended by one time unit.
  • the setpoint is reached or exceeded, so that the calibration process is completed.
  • the functional reliability of the process is not limited by temporary disturbances in the water supply or in the supply network as well as inadequate sensitivity of the flowmeter.
  • the safety of the method can be further increased by the fact that in a diagnosed disorder controlled by the system at a later time is checked again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Domestic Plumbing Installations (AREA)
  • Water Treatment By Sorption (AREA)
  • Regulation And Control Of Combustion (AREA)

Claims (4)

  1. Procédé pour vérifier des valves dans un appareil ménager commandé par programme et utilisant de l'eau, en particulier dans un lave-linge ou un lave-linge séchant, lequel est équipé d'une valve de commande (9) commandant l'alimentation d'eau, d'un dispositif de mesure (5, 17) détectant l'arrivée d'eau et d'un système d'alimentation de sécurité comprenant une valve d'arrêt (8) destinée à fermer l'alimentation d'eau en cas d'anomalie due à l'eau de fuite, le bon fonctionnement des valves de commande et d'arrêt (9 et 8) étant vérifié à chaque mise en marche de l'appareil ménager avant, après et/ou pendant le déroulement du programme, caractérisé en ce que pendant une phase prédéterminée d'alimentation d'eau, des valeurs mesurées sont enregistrées par ledit dispositif de mesure détectant l'arrivée d'eau, de manière continue ou à intervalles courts prédéterminés, la valve de commande (9) et la valve d'arrêt (8) étant alors successivement fermées pour une courte période (At) et la variation des valeurs mesurées étant comparée par un système d'évaluation intelligent avec une valeur préscrite stockée en mémoire.
  2. Procédé selon la revendication 1, caractérisé en ce que les valves (8, 9) de vérification du fonctionnement sont alternativement ouvertes et fermées et en ce qu'une variation déterminée des valeurs mesurées d'un dispositif de mesure détectant l'arrivée d'eau sert à l'identification d'un défaut sur une valve.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la période (Δt) est prolongée une fois ou plusieurs fois d'une unité de temps jusqu'à ce que les valeurs mesurées aient atteint une valeur de consigne durant le temps de fermeture, déterminée à partir d'essais.
  4. Procédé selon l'une des revendications 2 à 3, caractérisé en ce qu'un signal d'avertissement et/ou un message d'erreur est émis lorsqu'une anomalie significative est détectée par le système d'évaluation intelligent.
EP20040015415 2003-08-26 2004-06-30 Procédé pour vérifier le fonctionnement des valves dans un appareil ménager utilisant de l'eau Expired - Lifetime EP1510610B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10339252 2003-08-26
DE2003139252 DE10339252A1 (de) 2003-08-26 2003-08-26 Verfahren zum Überprüfen von Ventilen in einem programmgesteuerten wasserführenden Haushaltgerät

Publications (3)

Publication Number Publication Date
EP1510610A2 EP1510610A2 (fr) 2005-03-02
EP1510610A3 EP1510610A3 (fr) 2008-08-27
EP1510610B1 true EP1510610B1 (fr) 2010-09-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040015415 Expired - Lifetime EP1510610B1 (fr) 2003-08-26 2004-06-30 Procédé pour vérifier le fonctionnement des valves dans un appareil ménager utilisant de l'eau

Country Status (4)

Country Link
US (1) US7225056B2 (fr)
EP (1) EP1510610B1 (fr)
AT (1) ATE479790T1 (fr)
DE (2) DE10339252A1 (fr)

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Also Published As

Publication number Publication date
EP1510610A3 (fr) 2008-08-27
EP1510610A2 (fr) 2005-03-02
US7225056B2 (en) 2007-05-29
DE10339252A1 (de) 2005-03-31
US20050049756A1 (en) 2005-03-03
ATE479790T1 (de) 2010-09-15
DE502004011603D1 (de) 2010-10-14

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