EP1963796A2 - Dispositif de determination d'un niveau dans un recipient de liquide d'un appareil, en particulier d'un appareil menager, et detecteur de niveau et circuit detecteur correspondants - Google Patents

Dispositif de determination d'un niveau dans un recipient de liquide d'un appareil, en particulier d'un appareil menager, et detecteur de niveau et circuit detecteur correspondants

Info

Publication number
EP1963796A2
EP1963796A2 EP06819819A EP06819819A EP1963796A2 EP 1963796 A2 EP1963796 A2 EP 1963796A2 EP 06819819 A EP06819819 A EP 06819819A EP 06819819 A EP06819819 A EP 06819819A EP 1963796 A2 EP1963796 A2 EP 1963796A2
Authority
EP
European Patent Office
Prior art keywords
liquid
level sensor
level
liquid level
detector circuit
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Withdrawn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
EP06819819A
Other languages
German (de)
English (en)
Inventor
Christian Duscher
Bernhard Kobl
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 EP1963796A2 publication Critical patent/EP1963796A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/243—Schematic arrangements of probes combined with measuring circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm

Definitions

  • Device for determining a level of a liquid container of a device in particular domestic appliance and level sensor and
  • the present invention relates to a device for determining a predetermined level, in particular a specified safety level of a liquid container of a liquid working or processing this device, in particular a domestic appliance by means of a liquid-Füllstandssen- soranowski connected detector circuit which upon reaching or exceeding a certain specified level by the liquid in question in which this receiving liquid container is able to deliver a message signal.
  • the present invention further relates to a liquid level sensor for a device of the aforementioned type and to a detector circuit which is connectable to such a liquid level sensor.
  • a level sensor is known (DE 196 43 753 C1), which contains at least one can be acted upon by the fluid contained in a liquid container buoyancy body, by the free end of a force sensing element contacting a force can be acted upon.
  • a compensation rod resting on a fulcrum support is arranged with one end, and at the opposite end a compensation weight is attached.
  • the unilaterally determined force-measuring element is formed by a resistance sensor, a piezomeasurement transducer, a spring travel measuring system or by a bending body element. But this has this known level sensor on a relatively high design effort.
  • level sensors operating with pressure transducers are known in connection with electrically operated domestic appliances (DE 198 35 865 C2, DE 199 08 804 A1, DE 199 20 870 C2).
  • level sensors either conventional mechanical pressure cells or flow meters or dynamic pressure gauge are used to determine fluid levels in liquid containers. The associated design effort is also relatively high.
  • level sensors for determining the liquid level of liquid containers (DE 101 35 191 A1, DE 102 01 767 A1), each containing a light emitting element, in particular in the form of a light emitting diode, and a light receiver, in particular in the form of a photodiode and in which the light emitter and the light receiver are respectively arranged on the outside of the respective liquid container at opposite locations, which correspond to the liquid level to be determined and thus fill level within the respective liquid container.
  • the functioning of such level sensors requires a correspondingly designed optical connection path between the respective light emitter and the respective light receiver through the respective liquid container. However, this is associated with a significant design effort, which is generally considered undesirable.
  • a laundry treatment device such as a washing machine, a washer-dryer or a tumble dryer with an electrically conductive liquid container in the form of a tub and / or a laundry drum receiving known (DE 43 04 009 C2), in which by means of a liquid level sensor array electrical resistance or other electrical property of the liquid in the liquid container in question and evaluated in an evaluation circuit.
  • the mentioned liquid level sensor arrangement is electrically connected firstly to this container and secondly to the conductive surface of a door, by means of which the relevant liquid container is directed towards the outside is closable.
  • the said door consists of a pot-shaped sight glass, which is provided with an electrically conductive coating of tin dioxide, tin dioxide with a metallic alloy or an electrically conductive ceramic layer.
  • a water protection device for a household appliance namely for a dishwasher or washing machine known (DE 195 28 322 C2), which has a working container to which a working fluid can be supplied.
  • Known water protection device comprises a drip pan on the bottom of the device, in which the working fluid at an uninterrupted water inlet after an overflow in the working container can be introduced.
  • a level sensor which determines the filling of the working container with working fluid during a time at which such filling is not provided, and an electronic control system for the program control of the dishwasher or washing machine are provided. From the control electronics, a drain pump can be activated if the invalid at this time filling is detected.
  • the aforementioned level sensor which has two electrodes provided at a distance from one another, a conductivity measurement of the working fluid located between these electrodes takes place.
  • the two electrodes are to a certain extent designed as pin electrodes, which are arranged at different heights in the mentioned working container.
  • a safety fill level is understood here to mean a liquid fill level lying above a normal fill level of the respective liquid container, which level must never be exceeded. In fact, if such a safety level is exceeded, there is a risk that the liquid contained in the liquid container in question may escape from it, even in the case of a liquid container closed by a door, for example through inlet openings normally connected to the relevant liquid container.
  • the invention is therefore based on the object to show a way how a liquid level and in particular a safety level of a liquid container of a device, in particular a domestic appliance with particularly low design effort can be determined and how it also generates liquid level signals effectively and can be evaluated.
  • the liquid level sensor arrangement comprising at least one liquid level sensor having an insulated electrically conductive contact part with an exposed or exposed only at the level of said predetermined level for contact with said liquid and that this contact portion is connected to a signal input of the detector circuit whose the associated signal input associated reference potential input is in communication with said liquid.
  • the liquid level sensor used according to the invention may for example be formed by a generally insulated sheet metal part, such as stainless steel, which only in the amount of said specified level, in particular a specified safety level may be exposed or exposed for contact with said liquid, so allowed to produce an electrically conductive connection in this area with the liquid occurring there.
  • the arrangement of this liquid level sensor is particularly simple. Namely, said generally insulated electrically conductive contact contact part can, as will be seen in more detail below, simply be hung over the edge of the liquid container, in which the fill level is to be monitored and thus determined.
  • the signal indicative of the above-mentioned detector circuit for regulating the liquid level in the liquid container is approachable. This makes it possible in an advantageous manner, to avoid overflow of the respective liquid container by the liquid absorbed by him.
  • the liquid feed into the respective liquid container is expediently shutdown, i. the liquid inlet can be prevented, and / or it is vorNeillbar a liquid discharge from the liquid container in question.
  • said level sensor is arranged in the region of a door through which said liquid container can be closed to the outside.
  • the liquid level sensor is arranged at a location in the region of the middle of said liquid container.
  • a liquid level sensor for a device for determining a predetermined level, in particular a specified safety level of a liquid container of a working or working with a liquid device, in particular a household appliance.
  • This liquid level sensor is characterized in that it has an electrically arranged contact part arranged in an insulated manner with an exposed or exposed area for contact with said liquid only at the level of the specified level, to which a signal input of a detector circuit can be connected, which is connectable to said reference signal input with the said liquid with a said signal input.
  • a detector circuit which contains a semiconductor circuit connected to a supply DC voltage source, which is connected to a signal input with the liquid Level sensor and with a reference potential input to the liquid is brought into connection, the level of which is detectable in a liquid container containing them by means of the liquid level sensor, and only upon contact of the exposed or exposed electrically conductive contact portion of the level sensor by said liquid a conductive Current path effectively switches, via the signals from an AC voltage source connected to the relevant semiconductor circuit for evaluation feasible or deliverable as alarm signals are.
  • the particularly safe working detector circuit according to the invention by a small effort.
  • the AC voltage source is a rectangular signal source, which is connected in series with the DC supply voltage source.
  • the detector circuit is particularly easy to implement and safe to operate.
  • said semiconductor circuit includes a single bipolar transistor, the base side of said liquid level sensor is connectable and the emitter or collector side is connected to the supply voltage source.
  • the said bipolar transistor is connected on the base side via a capacitor arrangement with the liquid level sensor.
  • a particularly reliable operation of the detector circuit according to the invention is ensured in a relatively simple manner.
  • Said capacitor arrangement contains according to a development of the invention at least one high-voltage-resistant capacitor, a so-called Y2 capacitor. It is also possible to use at least two such high-voltage-resistant capacitors in series, or a component comprising two series-connected high-voltage-resistant capacitors. As a result, safe operation of the detector circuit according to the invention is ensured in a relatively simple manner, taking into account voltage safety aspects.
  • the collector or emitter circuit of said bipolar transistor arranged for the emitter-collector current or the collector-emitter current of said bipolar transistor diode is arranged, with which an RC element is connected in series to in the case of a bipolar transistor which is controlled in the conducting state, a voltage drops which can be used as a signaling signal or for the output of a signaling signal.
  • the relevant bipolar transistor can be controlled in a relatively simple manner by voltage signal components of a polarity of the output from said AC voltage source or square wave voltage signals in the conductive state, thereby an evaluable signal via its then conductively controlled emitter collector or To give collector-emitter line.
  • Fig. 1 shows a reduced fragmentary front view of a domestic appliance to which the present invention is applied.
  • Fig. 2 shows in an enlarged sectional view along the registered in Fig. 1 section line l-l a liquid level sensor according to an embodiment of the invention.
  • FIG. 3 shows a schematic diagram of the structure of an evaluation circuit with a detector circuit according to an embodiment of the invention.
  • Fig. 1 a front view of a device, in particular a household appliance HG is shown in a reduced section, which works with a liquid or processes it.
  • the device or household appliance HG in question may be, for example, a washing machine, a washer-dryer or a dishwasher.
  • the household appliance HG shown in detail in FIG. 1 is, for example, a dishwasher.
  • a door T is indicated in the upper part of Fig. 1, with which a work area contained in the domestic appliance HG is liquid-tightly closed.
  • this work area comprises a washing drum and, in the present case, a dishwasher, at least one dishware basket.
  • the household appliance HG shown in detail in FIG. 1 has an area covered by a covering part V, in which there is a wash tub SW, which serves to receive a washing liquid with which the domestic appliance HG working here forms the dishwasher to wash dishes taken from her.
  • the rinse tank SW is, as indicated in Fig. 1, formed vat-shaped.
  • a so-called bottom trough BW arranged below the rinse tank SW, which effectively serves as a protective trough for liquid, which passes beyond the wash tub SW addition.
  • the household appliance HG has Aufstellfee on the bottom, of which in Fig. 1, two feet F1, F2 are indicated. In general, four Aufstellffure are provided at all four corners of the relevant household appliance HG.
  • a liquid level sensor S1 is arranged within the wash tub SW.
  • several liquid level sensors may be provided here, in particular at different heights.
  • Another liquid level sensor S2 is arranged in the central region of the bottom trough BW, and more precisely at the bottom of this bottom trough BW or in its vicinity.
  • the relevant liquid level sensors S1, S2 are, it should be noted here, within the two trays SW, BW respectively to the front of the household appliance HG, ie arranged to the side of the device on which the door T is located.
  • liquid levels in the two tubs SW, BW can be reliably determined precisely in the case of the critical inclination of the household appliance HG which is inclined forwards, that is to say towards the door side.
  • the liquid level sensor S1 of the washing tub SW can be saved because the overflowed liquid can be detected by the liquid level sensor S2 of the bottom tub BW.
  • the liquid level sensor S1 in FIG. 2 is shown in an enlarged scale. cut shown in detail.
  • This section corresponds to a section II according to the section lines II entered in FIG.
  • the door T mentioned in connection with FIG. 1 and the covering part V of the domestic appliance HG are shown in fragmentary form.
  • the rinsing tank SW is indicated, which, like the bottom tank BW shown in FIG. 1, may consist of an electrically conductive material, in particular of stainless steel, and which is connected at one point to protective earth PE.
  • the bottom trough BW can also be connected to the protective earth PE.
  • the washing tub SW is surrounded in the region of its tub rim WR by an example of rubber or plastic existing splash guard SP, which is fixed with its remote from the tub rim WR end to a cover A of the trim panel V. This ensures that movements occurring within the rinse tub SW of a rinsing fluid taken up by this rinse pan SW do not pass beyond the rim WR.
  • the liquid level sensor S1 indicated schematically in FIG. This is shown in Fig. 2 only schematically to illustrate the principle of the present invention.
  • the liquid level sensor S1 includes an electrically conductive contact part LE, which is completely surrounded by an electrical insulation IS except for an exposed area FR.
  • the exposed or exposed area FR is located here only on the side of the contact part LE lying towards the top of the device. This ensures that the liquid level sensor S1 containing the contact part LE only reliably determines the fixed liquid level or level N1 when it is surrounded by liquid in its area FR lying at this level N1.
  • the liquid contained in the flushing tank SP before reaching the level N1 by the liquid contained in the flushing tank SP and assuming rising in level liquid and directed against the contact part LE liquid splash thus causing no erroneous level detection.
  • the electrically conductive contact part LE is here bent together with its insulation IS here according to the shape of an inverted letter S such that its exposed or exposed area FR in the range of the fixed liquid level or level N1 within the rinse tub SW is located.
  • this liquid level N1 is, in particular, a safety fill level at the time of reaching or exceeding which certain safety measures are to be taken in the domestic appliance HG, such as, for example, the shutdown of a liquid feed into the household appliance HG and / or the making of a Liquid discharge from the relevant domestic appliance HG.
  • This liquid level or level N2 may, for example, be the liquid level or level for the normal operation of the domestic appliance HG.
  • This liquid level or level N2 can basically be determined or monitored with a liquid level sensor completely corresponding to the liquid level sensor SI. But it is also possible to use for this task any other known liquid level sensor.
  • liquid level sensor S1 As shown in more detail in Fig. 2, it should be noted that its electrically conductive contact part LE, for example, by a few centimeters, such as 1 to 10 cm wide sheet metal part of a metal, in particular from stainless steel, can exist. Alternatively, however, the sheet metal part can also extend over the entire width of the indicated in Fig. 1 Spülwanne SW.
  • the insulation IS may be formed by any insulating material which is resistant to the liquid with which the liquid level sensor S1 can come into contact in the household appliance HG in question.
  • the electrically conductive contact part LE of the liquid level sensor S1 leads to a detector circuit (not shown in FIG. 2).
  • the liquid level sensor S2 indicated in FIG. 1 and any further liquid level sensors possibly provided may also be connected to this detector circuit.
  • the respective detector circuit or an evaluation circuit containing these can either be attached directly to the liquid level sensor S1 or S2 or be electrically connected thereto.
  • FIG. 3 schematically shows, on the basis of an electrical circuit diagram, the construction of an evaluation circuit in which the above-mentioned detector circuit is contained in one embodiment. Before discussing this detector circuit in more detail, the basic circuit design according to FIG. 3 is considered first.
  • an AC voltage source WE is indicated, which may be a mains AC voltage source which emits, for example, a 50 Hz mains AC voltage of 230Veff.
  • the respective AC voltage source WE may alternatively be a power supply device for the operation of the domestic appliance HG which delivers an AC voltage derived from the AC mains voltage and in which the relevant circuit arrangement is contained.
  • a mains AC voltage source WE has, as indicated in Fig. 3, a phase conductor P and a neutral conductor N. With these two conductors P, N, a line filter NF is connected as shown in FIG. 3, to which two capacitors C1 and C2 in series belong.
  • capacitors C1, C2 are preferably so-called Y2 capacitors, ie high-voltage-resistant capacitors (voltage strength> 5000V), which ensure special safety in the line filter NF and thus in the entire device or household appliance.
  • the common connection point of the two capacitors C1 and C2 of the mains filter NF is connected in the present case with protective earth PE of the domestic appliance HG.
  • the detector circuit in question contains a semiconductor circuit which is formed here by a single bipolar transistor Q1 of the pnp conductivity type.
  • This transistor Q1 is connected with its emitter via an ohmic resistor R3 to the positive terminal VQQ of a supply DC voltage source (not shown).
  • the transistor Q1 With its collector, the transistor Q1 via the series circuit of a claimed for a current flow through the emitter-collector path of the transistor Q1 in the direction of the diode D1 and connected to this parallel RC element of an ohmic resistor R2 and a capacitor C5 with the negative terminal Vg of the mentioned DC supply voltage source connected.
  • the relevant negative pole Vg of the mentioned DC supply voltage source is otherwise connected to the neutral conductor N of the already mentioned AC voltage source WE.
  • the base of the transistor Q1 is connected via a resistor R1 to the emitter of this transistor Q1.
  • the base of the transistor Q1 is connected via a capacitor arrangement, which in the present case comprises two capacitors C3 and C4 connected in series, with the liquid level sensor SI indicated only in FIG. 3 as a circuit point.
  • These capacitors C3 and C4 are also Y2 capacitors, ie high-voltage-resistant capacitors, which are particularly reliable.
  • These two capacitors C3, C4 may have capacities of, for example, 2.7nF and 27nF, respectively. Basically, although only one capacitor is used here, the two capacitors C3 and C4 are provided as a series circuit for safety reasons.
  • capacitors C3, C4 strike through for any reason, the respective circuit arrangement is still with the then still intact capacitor still operational. It can also be used a single component in which the two capacitors C3 and C4 are integrated as a series circuit. With regard to the capacitors C3, C4, it should also be noted here that they act as a high-pass filter for the 50 Hz alternating voltage and thus do not allow any interference voltage to be supplied to the transistor Q1.
  • the liquid level sensor S1 is connected to the protective earth PE mentioned by way of a resistance RW indicated by dashed lines, also called liquid resistance.
  • RW indicated by dashed lines, also called liquid resistance.
  • Said resistance RW has, depending on the composition of the liquid in question an ohmic fraction in the order of a few ohms to a few hundred ohms.
  • an AC voltage source is connected in the present case, which is in this case a rectangular signal source RE, the rectangular pulses with a frequency for example, between I kHz and 2OkHz outputs.
  • the respective AC voltage source and the said DC supply voltage source are thus electrically connected in series. Due to the thus provided As can be seen, a voltage or conductance value (RW) is applied in the event that the liquid level sensor S1 is surrounded by liquid.
  • a level evaluation circuit PB is connected to its input El. With its reference signal input (not shown), the level judging circuit PB is connected to the negative pole Vg of the mentioned DC power source. From an output terminal AU, the level evaluation circuit PB is capable of outputting notification signals in the event that the presence of a liquid is indicated by means of the liquid level sensor S1.
  • the relevant level evaluation circuit PB can be formed for example by a microcontroller with input-side A / D converter. Incidentally, with the delivery of rectangular pulses, this microcontroller can assume the task of the mentioned rectangular signal source RE.
  • the transistor Q1 In the idle state, that is to say when the liquid level sensor S1 does not detect any liquid, the transistor Q1 is blocked by the positive potential provided by the positive pole VQQ of the DC supply voltage source at its base.
  • the rectangular pulses emitted by the square-wave signal source RE can likewise not conduct transistor Q1, since no current path exists for these square-wave pulses at this time.
  • Link with the ohmic resistance R2 and the capacitor C5 is thus the negative potential of the negative terminal or terminal Vg of the DC supply voltage source.
  • the level evaluation circuit PB does not output a notification signal at the output terminal AU.
  • the liquid level sensor S1 If, by means of the liquid level sensor S1, the presence of a liquid in the washing tub SW containing this sensor according to FIGS. 1 and 2 is determined, so that a relatively low-resistance liquid resistance RW exists between this liquid level sensor S1 and protective earth PE, then flows Rectangular pulse current of the rectangular signal source RE via the ohmic resistor R1, the two capacitors C4, C3, to be considered as a water resistance fluid resistance RW and the capacitor C2 of the line filter NF.
  • the positive pulse components of the respective square-wave pulses cause the resistor R1 to drop such a voltage that a lower potential is present at the base of the transistor Q1 than at its emitter.
  • this signaling signal can be used to shut down the liquid feed into the domestic appliance HG to which the relevant circuit arrangement belongs and / or to carry out the liquid drain from this domestic appliance. But it is also possible, in addition to or independently of an optical and / or acoustic message signal to make to take appropriate protective measures by an operator.
  • the diode D1 serves to prevent the capacitor C5 from appearing on the collector-base path of the then-blocked transistor Q1 and the ohmic resistor R1 when the negative pulse components of the square wave signal emitted by the rectangular signal source RE appear can discharge.
  • the ohmic resistor R2 which has a relatively high resistance, serves to slowly discharge the capacitor C5 when the liquid level sensor S1 loses contact with the liquid and thus the transistor Q1 is switched to the blocking state. Thus, the circuit arrangement is returned to its original state.
  • the detector circuit shown in Fig. 3 can also be realized in other ways.
  • the bipolar transistor QI may be replaced by an npn type bipolar transistor.
  • the polarity of the DC supply voltage and the polarity of the diode D1 must be adapted to the changed conditions.
  • the semiconductor or bipolar transistor is AC-dependent by the positive or negative pulse components. tend, which result from the rectangular pulses output by the rectangular signal source RE at the common connection point of the ohmic resistor R1 and the capacitor arrangement of the capacitors C3, C4, when the liquid level sensor S1 has detected a liquid and thus an electrically conductive connection via the liquid resistance RW is made.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Washing And Drying Of Tableware (AREA)

Abstract

L'invention concerne la détermination d'un niveau, en particulier d'un niveau de sécurité (N1) d'un récipient de liquide (SW) d'un appareil agissant sur un liquide ou traitant un liquide, en particulier un appareil ménager (HG), au moyen d'un circuit détecteur (Q1, PB) relié avec un dispositif détecteur de niveau de liquide (S1), susceptible de fournir un signal d'avertissement lorsqu'on atteint ou dépasse un niveau établi, prédéterminé (S1) du liquide considéré dans ledit récipient (SW). L'invention est caractérisée en ce que le dispositif détecteur du niveau de liquide (S1) comprend au moins un détecteur de niveau (S1) qui présente un élément de contact (LE) électroconducteur, monté isolé, ayant une zone libre ou découverte (FR), uniquement à la hauteur du niveau établi précité (N1) pour un contact avec le liquide précité ; et en ce que l'élément de contact (LE) est lié avec l'entrée d'un signal du circuit détecteur (Q1, PB) dont l'entrée du potentiel de référence correspondant à l'entrée du signal considéré est en relation avec le liquide précité.
EP06819819A 2005-12-16 2006-11-28 Dispositif de determination d'un niveau dans un recipient de liquide d'un appareil, en particulier d'un appareil menager, et detecteur de niveau et circuit detecteur correspondants Withdrawn EP1963796A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005060363A DE102005060363A1 (de) 2005-12-16 2005-12-16 Vorrichtung zur Ermittlung eines Füllstandes eines Flüssigkeitsbehälters eines Gerätes, insbesondere Hausgerätes sowie Füllstandssensor und Detektorschaltung hierfür
PCT/EP2006/068997 WO2007068583A2 (fr) 2005-12-16 2006-11-28 Dispositif de determination d'un niveau dans un recipient de liquide d'un appareil, en particulier d'un appareil menager, et detecteur de niveau et circuit detecteur correspondants

Publications (1)

Publication Number Publication Date
EP1963796A2 true EP1963796A2 (fr) 2008-09-03

Family

ID=38036751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06819819A Withdrawn EP1963796A2 (fr) 2005-12-16 2006-11-28 Dispositif de determination d'un niveau dans un recipient de liquide d'un appareil, en particulier d'un appareil menager, et detecteur de niveau et circuit detecteur correspondants

Country Status (7)

Country Link
US (1) US20090266442A1 (fr)
EP (1) EP1963796A2 (fr)
KR (1) KR20080081272A (fr)
CN (1) CN101331387A (fr)
DE (1) DE102005060363A1 (fr)
RU (1) RU2008126192A (fr)
WO (1) WO2007068583A2 (fr)

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CN101331387A (zh) 2008-12-24
DE102005060363A1 (de) 2007-06-21
RU2008126192A (ru) 2010-01-27
US20090266442A1 (en) 2009-10-29
WO2007068583A2 (fr) 2007-06-21
KR20080081272A (ko) 2008-09-09
WO2007068583A3 (fr) 2007-10-04

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