EP2183424B1 - Wasserführendes haushaltgerät mit einer vorrichtung zur ermittlung eines füllstandes innerhalb eines behälters des haushaltgeräts und zugehöriges verfahren - Google Patents

Wasserführendes haushaltgerät mit einer vorrichtung zur ermittlung eines füllstandes innerhalb eines behälters des haushaltgeräts und zugehöriges verfahren Download PDF

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Publication number
EP2183424B1
EP2183424B1 EP20080787232 EP08787232A EP2183424B1 EP 2183424 B1 EP2183424 B1 EP 2183424B1 EP 20080787232 EP20080787232 EP 20080787232 EP 08787232 A EP08787232 A EP 08787232A EP 2183424 B1 EP2183424 B1 EP 2183424B1
Authority
EP
European Patent Office
Prior art keywords
sensor
liquid
filling state
diaphragm
domestic appliance
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.)
Active
Application number
EP20080787232
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2183424A1 (de
Inventor
Thomas Kaltofen
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
Priority to PL08787232T priority Critical patent/PL2183424T3/pl
Publication of EP2183424A1 publication Critical patent/EP2183424A1/de
Application granted granted Critical
Publication of EP2183424B1 publication Critical patent/EP2183424B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F39/087—Water level measuring or regulating devices
    • 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
    • A47L15/4244—Water-level measuring or regulating arrangements
    • 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
    • A47L15/4246—Details of the tub
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • 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
    • Y10T137/0324—With control of flow by a condition or characteristic of a fluid
    • 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
    • Y10T137/7287—Liquid level responsive or maintaining systems
    • Y10T137/729—Washing machine cycle control

Definitions

  • the invention relates to a water-conducting household appliance with a device and a method for determining a level of liquid within a container of a water-conducting household appliance, in particular a washing machine, the type specified in the preamble of claims 1 and 10 respectively.
  • variable level or the variable liquid level within a container hereinafter also referred to as a tub
  • a washing machine is usually measured in today's devices via an air column, which communicates with the liquid located within the tub.
  • a change in the level or liquid level thus leads to a change in the air pressure or air volume, which arises between the liquid of the tub and a designed as a pressure sensor level sensor.
  • the level within the tub is determined depending on the height of the air column.
  • Such a device or such a method are for example already in the EP 1 341 955 B1 to be known as known.
  • a pressure line is arranged in a drain hose, in an area below the tub, softer with the liquid or the wash liquor is in contact.
  • the actual level sensor is arranged above the tub to detect the corresponding level of liquid within the tub by the change in the air column.
  • EP 1 087 052 A2 discloses a waxing machine with a level sensor, which is arranged on the tub and connected via a pressure hose to the drain hose. Within the housing of the level sensor, an acceleration and a temperature sensor are also arranged.
  • Object of the present invention is to provide a water-conducting household appliance with a device and a method of the type mentioned above, with which an extremely insensitive determination of the level of the liquid can be carried out within the tub.
  • the level sensor is arranged at least with a detection part in a covered during the washing process with the liquid lower portion of the tub.
  • the filling level is carried out by direct measurement of the pressure column formed by the liquid of the tub by the particular designed as a pressure sensor level sensor itself is arranged at least with its detection part in contact with the liquid in the tub. It is clear that for this purpose the detection of the level sensor must be located in a corresponding lower portion of the tub, so that a reliable overlap with the liquid is ensured during the washing process. Under washing process is to be understood not only the rotation of a washing drum within the tub, but any state in which liquid is located within the tub.
  • the arrangement of at least the detection part of the level sensor directly within or in contact with the liquid has the advantage that the detection or output of the level sensor significantly less sensitive to short-term pressure peaks by the direct coupling to the tub and the use of the large volume of liquid is, which arise due to the washing mechanism or the rotating within the tub laundry.
  • Another advantage of the direct integration of the level sensor into the tub is that a plurality of components for pressure transfer or for generating an air column can now be omitted. This results in a total of a particularly cost-effective device for determining the level within the tub of the washing machine
  • a detection device by means of which the level of the liquid is to be determined on the basis of the pressure value detected by the level sensor.
  • the detection part of the level sensor comprises a planar sensor element, which is covered by an elastic and pressure-transmitting membrane.
  • a membrane thus initially has a protective function in order to protect the actual sensor element of the fill level sensor from the liquid. Due to the corresponding elastic properties of the membrane, which is preferably designed relatively large format, thus a virtually error-free pressure transmission is achieved to the flat sensor element of the level sensor.
  • the membrane serves both for pressure transmission and as protection against media in direct contact with an electrically conductive liquid.
  • the membrane is arranged to form a closed intermediate space at a distance in front of the planar sensor element.
  • the detected by the diaphragm pressures or pressure differences are thus passed through the gap to the planar sensor element of the level sensor.
  • the closed space between the membrane and the planar sensor element is filled, for example, with a gas, and in particular with air.
  • the membrane is formed in a further embodiment of the invention, for example, as a separate pressure transmission membrane, which is held on a sensor housing of the level sensor.
  • appropriate seals may be provided to keep the gap between the membrane and the sensor element dry.
  • the membrane is designed as a protective membrane formed integrally with a sensor housing of the level sensor.
  • a seal of the Interspace between the membrane and the flat sensor element of the level sensor achieved.
  • the pressure or level sensor is additionally equipped in a further embodiment of the invention with a temperature sensor to detect the temperature of the liquid within the tub.
  • the temperature value of the liquid is determined in a further embodiment of the invention by means of the already existing detection device.
  • the pressure or fill level sensor can be equipped with further sensors that detect a property of the liquid.
  • the pressure sensor may include an optical sensor for detecting fluid haze having a light source and a photosensitive member. The light source and the receiving element are arranged in such a way in the pressure or level sensor that the emitted light radiates through a region of the liquid and the remaining light intensity is detected by the receiving element.
  • the number of components within the washing machine can be reduced in a cost effective manner.
  • Fig. 1 is shown in a schematic front view of a tub 10 a washing machine 1.
  • a control panel 3 with a rotary selector 5 and a display 4 is arranged.
  • a control 2 which is at least electrically connected to the display 4 and the rotary selector 5, shown with a dashed line.
  • an internal drum or washing drum 12 was added, which is rotated about a drum axis T during washing.
  • the tub 10 is filled with a liquid 14 or with a wash liquor.
  • a level 16 or level is marked accordingly.
  • a level sensor in the form of a pressure sensor 18 is arranged with a detection part 20. This arrangement is particularly in conjunction with Fig. 2 recognizable.
  • Fig. 2 in a fragmentary enlarged front view and sectional view, the detail II as In Fig. 1 ,
  • the level sensor 18 is not completely disposed within the tub 10, but rather only with the detection part 20.
  • the level sensor 18 optionally at least approximately completely within the Lye container 10 could be arranged.
  • a seal 24 can be seen, by means of which a passage opening 26 (dashed line) is sealed within the wall of the tub 10 to the level sensor 18 out.
  • a so-called RAST 2.5 connector 28 is disposed on the level sensor 18, the here for electrical transmission of the detected by the level sensor 18 values or signals to a detection device 42 and / or to a controller 2 of the washing machine 1 is used.
  • the detection device 42 is a component of the controller 2.
  • FIG. 3 shows the embodiment of the detection part 20 of the level sensor 18 according to Fig. 2 in a schematic sectional view.
  • Fig. 4 shows a sectional view of a detection part 20 of the level sensor 18 in an alternative embodiment.
  • the detection part 20 comprises a planar sensor element 30, which is covered by an elastic and pressure-transmitting membrane.
  • This membrane is in the embodiment according to the FIGS. 2 and 3 designed as a separate pressure transmission membrane 32 which is attached or held as a separate part to a sensor housing 34 of the level sensor 18.
  • the pressure-transmitting membrane 32 is arranged at a distance in front of the planar sensor element 30 with the formation of a closed intermediate space 36.
  • a seal 38 is provided in the form of an O-ring, which ensures a corresponding seal between the pressure transmission membrane 32 and the sensor housing 34.
  • the diaphragm is designed as a protective membrane 40 formed integrally with the sensor housing 34.
  • the protective membrane 40 is injection-molded onto the sensor housing 34 made of plastic. Again, the gap 36 between the protective membrane 40 and the planar sensor element 30 can be seen.
  • the intermediate space 36 between the respective membrane 32 or 40 and the flat sensor element 30 is in the present case filled with a gas, in particular with air.
  • the pressure or level sensor 18 in the present case, the detection of the respective level 16 by direct measurement of the pressure column formed by the liquid 14 within the tub 10.
  • the membrane 32 or 40 as pressure transmission and protection against media in direct contact with the electrically conductive liquid 14 directly in contact with this.
  • the level sensor 18 is constructively designed so that the outer contour of the level sensor 18 is formed at the point of direct contact with the liquid 14 as elastic, pressure-transmitting skin (membrane) and the pressure to the actual pressure-transforming membrane or the pressure-transforming sensor element 30 in Interior of the level sensor 18 transmits.
  • This transfer is particularly advantageous when the gap 36 is filled with a gas or air accordingly.
  • the level sensor 18 is connected to a detection device 42, by means of which the level 16 of the liquid 14 is to be determined based on the detected by the level sensor 18 pressure value.
  • the fill level sensor 18 is embodied, for example, as a piezoresistive, capacitive or inductive sensor in order to convert a conversion of the pneumatic pressure value into a continuously variable, analogue output signal, for example a direct electrical voltage.
  • the level sensor 18 may also be associated with a temperature sensor 44, by means of which the temperature of the liquid 14 is to be detected. It is clear that the temperature sensor 44 must accordingly be arranged at a location of the fill level sensor 18 in which a temperature contact with the liquid 14 is possible. Temperature values detected by the temperature sensor 44 can also be determined or evaluated by the determination device 42, for example. The determination device 42 can then pass on the determined values to the system controller 2 of the washing machine 1.
  • a method for determining the level 16 of liquid within the tub 10 during the washing process is thus feasible, in which a value induced by the liquid, in particular a pressure value, is detected by means of a suitable fill level sensor 18.
  • the detection by means of the level sensor 18 fulfills this directly in the manner described above within the liquid 14.
  • This particular direct coupling to the liquid 14 within the tub 10 and the use of the large volume of the liquid 14 is achieved, resulting in a much less sensitive sensor signal because brief pressure peaks due to the washing mechanism of, for example, rotating laundry are disregarded.
  • the invention is not limited to use in a laundry washing machine. Likewise, the invention can be applied to other water-conducting household appliances, in particular a dishwasher. In such cases, the Lye container may also be designed as a rinsing container.
  • the device for determining a level can also be arranged on a component arranged on the liquid container, for example a pump, the component receiving at least a portion of the liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP20080787232 2007-08-24 2008-08-14 Wasserführendes haushaltgerät mit einer vorrichtung zur ermittlung eines füllstandes innerhalb eines behälters des haushaltgeräts und zugehöriges verfahren Active EP2183424B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08787232T PL2183424T3 (pl) 2007-08-24 2008-08-14 Prowadzące wodę urządzenie gospodarstwa domowego z przyrządem do ustalania stanu napełnienia wewnątrz zbiornika w urządzeniu gospodarstwa domowego i przynależny sposób

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710040080 DE102007040080A1 (de) 2007-08-24 2007-08-24 Vorrichtung und Verfahren zur Ermittlung eines Füllstandes innerhalb eines Laugenbehälters einer Waschmaschine
PCT/EP2008/060702 WO2009027242A1 (de) 2007-08-24 2008-08-14 Vorrichtung und verfahren zur ermittlung eines füllstandes innerhalb eines laugenbehälters einer waschmaschine

Publications (2)

Publication Number Publication Date
EP2183424A1 EP2183424A1 (de) 2010-05-12
EP2183424B1 true EP2183424B1 (de) 2013-10-23

Family

ID=39803271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080787232 Active EP2183424B1 (de) 2007-08-24 2008-08-14 Wasserführendes haushaltgerät mit einer vorrichtung zur ermittlung eines füllstandes innerhalb eines behälters des haushaltgeräts und zugehöriges verfahren

Country Status (7)

Country Link
US (1) US9096966B2 (pl)
EP (1) EP2183424B1 (pl)
CN (1) CN101827972B (pl)
DE (1) DE102007040080A1 (pl)
EA (1) EA016379B1 (pl)
PL (1) PL2183424T3 (pl)
WO (1) WO2009027242A1 (pl)

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ITTO20091034A1 (it) * 2009-12-23 2011-06-24 Indesit Co Spa Macchina per il trattamento di panni comprendente un pressostato in particolare un pressostato lineare.
DE102010038668A1 (de) 2010-07-29 2012-02-02 BSH Bosch und Siemens Hausgeräte GmbH Hausgerät mit Füllstandssensor und Verfahren zum Bestimmen eines Zustandsparameters in einem Hausgerät
KR20120128359A (ko) * 2011-05-17 2012-11-27 주식회사 대우일렉트로닉스 세탁기의 수위측정오류 검출장치 및 검출방법
ITTO20110856A1 (it) * 2011-09-26 2013-03-27 Bitron Spa Apparecchio elettrodomestico di lavaggio provvisto di un dispositivo piezoelettrico.
CN103290650B (zh) * 2012-02-24 2017-09-12 博西华电器（江苏）有限公司 洗衣机的控制方法
US20140041728A1 (en) * 2012-08-10 2014-02-13 Whirlpool Corporation Laundry treating appliance and method of detecting oversuds
CN103015131A (zh) * 2012-12-21 2013-04-03 宁波市镇海怡福莱文化创意有限公司 一种洗衣机盖
DE202013002615U1 (de) 2013-03-19 2013-04-11 Seuffer Gmbh & Co.Kg Funktionsmodul mit einer Sensorvorrichtung
US9293792B2 (en) * 2013-05-10 2016-03-22 Tesla Motors, Inc. Self-activated draining system
US10034597B1 (en) * 2017-08-11 2018-07-31 Haier Us Appliance Solutions, Inc. Rack mounting features for a dishwasher appliance
CN109811514B (zh) * 2017-11-21 2023-01-13 青岛海尔洗衣机有限公司 一种洗涤设备
US11169548B2 (en) 2018-07-25 2021-11-09 Kohler Co. Water level detection via pressure sensing device
DE102019206978B4 (de) 2019-05-14 2020-12-17 Meiko Maschinenbau Gmbh & Co. Kg Geschirrspülmaschine zum Einsatz in einem Verkehrsmittel
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Also Published As

Publication number Publication date
WO2009027242A1 (de) 2009-03-05
EA016379B1 (ru) 2012-04-30
US9096966B2 (en) 2015-08-04
EP2183424A1 (de) 2010-05-12
DE102007040080A1 (de) 2009-02-26
CN101827972B (zh) 2012-05-30
US20110023919A1 (en) 2011-02-03
EA201070303A1 (ru) 2010-08-30
CN101827972A (zh) 2010-09-08
PL2183424T3 (pl) 2014-03-31

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