EP1604058A1 - Automatically controlled washing machine with overflow safety system - Google Patents
Automatically controlled washing machine with overflow safety systemInfo
- Publication number
- EP1604058A1 EP1604058A1 EP00984989A EP00984989A EP1604058A1 EP 1604058 A1 EP1604058 A1 EP 1604058A1 EP 00984989 A EP00984989 A EP 00984989A EP 00984989 A EP00984989 A EP 00984989A EP 1604058 A1 EP1604058 A1 EP 1604058A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- washing machine
- pressure
- circulation
- sensor device
- pump
- 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- Withdrawn
Links
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
- 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
- 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
- D06F39/083—Liquid discharge or recirculation arrangements
-
- 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
-
- 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
- D06F39/088—Liquid supply arrangements
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
Definitions
- the present invention relates, according to the preamble of claim 1, to an automatically controlled washing machine with at least one fresh water line and a lye recirculation system which discharges lye from the bottom of a laundry treatment room and feeds it back over a recirculation line by means of a circulation pump via a feed opening, the feed opening being designed in this way is that during the pumping operation, a dynamic pressure arises in the completely filled circulation line, the lye circulation system further comprising a sensor device which is arranged on the pressure side of the circulation pump and is sensitive to this dynamic pressure, the sensor device of a control device of the washing machine depending on the dynamic pressure a signal transmitted to control a supply valve for fresh water.
- Such a washing machine is known for example from DE 43 32 225 A1.
- This known washing machine has a lye recirculation system which discharges lye from a laundry treatment room on the floor and feeds it back to the treatment room above the laundry in the treatment room via a circulation line.
- the washing machine also has at least one fresh water supply line which can be opened or closed by means of a controllable valve.
- a sensor device is arranged in the lye circulation system, which is suitable for determining a volume flow in the conveying direction of the pump, and the control device of the washing machine is designed such that when the sensor device signals a lack of the volume flow, the valve is actuated in such a way that fresh water is fed.
- the Sensor device on the pressure side of the pump is coupled to the circulation line, and the feed opening between the circulation line and the laundry treatment room is designed such that a back pressure is present in the completely filled circulation line during pump operation.
- the sensor device is accordingly sensitive to this dynamic pressure and supplies the control device of the washing device with corresponding signals for opening and closing the valve of the fresh water supply.
- the sensor device emits a positive signal when the lye circulation system is completely filled and a back pressure has built up in front of the feed opening.
- the control device blocks the valve for the fresh water supply. If the dynamic pressure is insufficient, the sensor device emits a negative signal to the control device, which causes the solenoid valve to open.
- the fresh water supply is switched on and the missing amount of water is added.
- a disadvantage of this prior art is that if various elements, such as the solenoid valve, fail, no safety measures are installed that prevent the washing machine from overflowing.
- devices are known from the prior art which recognize the exceeding of a defined amount of water in the laundry treatment room and then initiate safety measures, such as switching on an emptying pump or closing an additional safety valve.
- This level of security is identified e.g. via pressure switches or via sensors that can be found behind an opening at a correspondingly high point in the water supply system.
- the object of the invention is to create a washing machine with a lye-recirculating system which has an overflow protection in a simple and inexpensive manner and is easy to maintain.
- an additional safety valve is installed in the fresh water line, which, in the case of a corresponding sensor signal, of the invention
- Overflow protection is closed by the control device of the washing machine. This prevents fresh water from the fresh water line from being fed unhindered into the laundry treatment room if the magnetic valve is defective.
- an emptying pump is provided as an additional safety measure, which can drain off lye in the floor area of the laundry treatment room. If there is too much water in the laundry treatment room, the drain pump can be switched on via the control device of the washing machine.
- the senor device is advantageously designed as a pressure switch.
- pressure switches are commercially available and easy to install.
- the pressure switch has two contacts that react to different preset pressure levels.
- a different contact is used than when measuring the static pressure of the amount of water in the laundry treatment room for the purpose of overflow protection.
- a single contact for measuring dynamic pressure and static pressure is provided in the pressure switch.
- the sensor level for activating safety measures and for closing the valve for the fresh water supply therefore only has to be set once to a fixed value.
- control device of the washing machine is programmed such that the circulating pump is switched off at periodic time intervals for a predetermined period of time. It is thus automatically ensured that the elements of the overflow protection at regular intervals
- the single figure shows a schematic representation of an embodiment of the washing machine according to the invention.
- the washing machine 17 has a tub as a laundry treatment room 1, in which a washing drum 2 is rotatably mounted horizontally. In the washing drum 2, laundry 3 and driver 4 for rearranging the laundry parts 3 when rotating the drum 2 can be seen.
- the wash liquor is introduced into the laundry treatment room 1 via a fresh water line 5 and a detergent container 6.
- the liquor circulation system 16 has a circulation line 9, in which a circulation pump 10 and a sensor device 12 are arranged. The vacuumed
- Wash liquor is returned to the laundry treatment room 1 from above via the circulation line 9 through a feed opening 13.
- An additional heating device 11 can be arranged on the pressure side of the circulation pump 10 in the circulation line 9.
- the sensor device 12 integrated in the lye rolling system 16 is connected to the control device 8 of the washing machine 17.
- the control device 8 is suitable, inter alia, for opening and closing the valve 7 for the supply of fresh water.
- a further safety valve 14 can be upstream of the valve 7 in the fresh water line 5.
- both the circulation pump 10 and the drain pump 15 and the safety valve 14 can be controlled by the control device 8 of the washing machine 17.
- the sensor device 12 is sensitive to this dynamic pressure and, depending on the level of the dynamic pressure, forwards a signal to the control device 8 of the washing machine 17 for opening or closing the valve 7 of the fresh water line 5. If there is sufficient dynamic pressure, the valve 7 is closed; if the circulation line 9 contains little or no alkali, the valve 7 is opened. In this way, the alkali located in the laundry treatment room 1 is limited to the absolutely necessary amount.
- the circulation line 9 fills with the lye present in the laundry treatment room 1. In this way it forms in the
- Circulation line 9 is a static water pressure which rises with the level of the water in the laundry treatment room 1 and is also recognized by the sensor device 12. If this static pressure exceeds a presettable safety level, i. H. If the static pressure corresponds to a critical amount of water in the laundry treatment room 1, the sensor device 12 sends a signal to the
- As a safety measure closing an additional valve 14 in the fresh water line 5 and / or switching on the drain pump 15 are provided.
- the circulation pump 10 is switched off, it can be ensured by means of the sensor device 12 integrated in the lye circulation system 16 that the washing machine 17 does not overflow due to a technical defect, such as the inoperability of the valve 7.
- the circulation pump 10 is usually switched off and the change in the limit pressure necessary in the case of two-contact pressure switches 12 is usually carried out by the central one
- the control device 8 regularly switches off the circulation pump 10 for short periods in which the function of the alkali circulation system 16 is interrupted and the sensor device 12 via the dynamic pressure which arises in the circulation line 9 Security measures for
- the central control device 8 processes the signals supplied by the sensor device 12 and immediately causes the safety valve 14 to close and / or the emptying pump 15 to be switched on.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19960265 | 1999-12-14 | ||
DE19960265A DE19960265B4 (en) | 1999-12-14 | 1999-12-14 | Automatically controlled washing machine with overflow protection |
PCT/EP2000/011040 WO2001044557A1 (en) | 1999-12-14 | 2000-11-08 | Automatically controlled washing machine with overflow safety system |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1604058A1 true EP1604058A1 (en) | 2005-12-14 |
Family
ID=7932620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00984989A Withdrawn EP1604058A1 (en) | 1999-12-14 | 2000-11-08 | Automatically controlled washing machine with overflow safety system |
Country Status (6)
Country | Link |
---|---|
US (1) | US6698254B2 (en) |
EP (1) | EP1604058A1 (en) |
JP (1) | JP2003516837A (en) |
KR (1) | KR100734674B1 (en) |
DE (1) | DE19960265B4 (en) |
WO (1) | WO2001044557A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100504501B1 (en) * | 2003-04-14 | 2005-08-02 | 엘지전자 주식회사 | Drum washer's washing method by spray steam |
EP1475472A3 (en) * | 2003-04-25 | 2008-10-22 | Lg Electronics Inc. | Wash water-circulating apparatus for washing machines and method of controlling the same |
KR101290460B1 (en) * | 2006-10-09 | 2013-07-26 | 엘지전자 주식회사 | Drum type washer |
US20090265863A1 (en) * | 2008-04-24 | 2009-10-29 | General Electric Company | Adaptive drain algorithm for clothes washers |
JP5147082B2 (en) * | 2009-12-01 | 2013-02-20 | 株式会社ハッピー | Washing machine |
EP2535454B1 (en) * | 2011-06-14 | 2021-05-12 | Electrolux Home Products Corporation N.V. | Washing machine |
CN103290650B (en) * | 2012-02-24 | 2017-09-12 | 博西华电器(江苏)有限公司 | The control method of washing machine |
DE102019209149A1 (en) * | 2019-06-25 | 2020-12-31 | BSH Hausgeräte GmbH | Laundry care device with a pumping device and a method for operating the laundry care device |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3729051A (en) * | 1971-08-17 | 1973-04-24 | G Mannion | Process fluid flow regulation systems |
JPS5496266A (en) * | 1978-01-13 | 1979-07-30 | Hitachi Ltd | Drainage device for washing machine |
DE2923906C2 (en) * | 1979-06-13 | 1981-01-08 | Basf Farben + Fasern Ag, 2000 Hamburg | Method and device for supplying paint to painting lines |
US4468170A (en) * | 1980-07-11 | 1984-08-28 | Beta Technology, Inc. | Low level indicator |
JPS5737496A (en) * | 1980-08-14 | 1982-03-01 | Matsushita Electric Ind Co Ltd | Washing machine doubling as hydroextracting |
US6200468B1 (en) * | 1980-09-29 | 2001-03-13 | Sanitaire Corporation | Aeration system apparatus with source of in situ cleaning agent and pressure monitoring connection for submerged diffuser |
IT1246260B (en) * | 1990-07-03 | 1994-11-17 | Zanussi Elettrodomestici | WATER LOAD MEASURING DEVICE FOR WASHING MACHINES. |
DE4026838A1 (en) * | 1990-08-24 | 1992-03-05 | Bosch Siemens Hausgeraete | Domestic dishwasher with rotary pressure pump - has pressure-responsive switching unit closing supply valve in dependence on pressure detected |
DE4332225B4 (en) * | 1993-06-07 | 2006-09-28 | BSH Bosch und Siemens Hausgeräte GmbH | Automatically controlled washing machine |
ES2208644T3 (en) * | 1993-06-07 | 2004-06-16 | Bsh Bosch Und Siemens Hausgerate Gmbh | AUTOMATICALLY CONTROLLED WASHER. |
KR0129222B1 (en) * | 1994-02-03 | 1998-04-09 | 구자홍 | Racing prevention apparatus of drainage pump in a washing machine |
JP3170160B2 (en) * | 1994-06-24 | 2001-05-28 | シャープ株式会社 | Drum type washing machine |
KR0156209B1 (en) * | 1995-01-04 | 1998-12-15 | 이헌조 | Ozone gas generating device of a washing machine |
IT1275186B (en) * | 1995-02-10 | 1997-07-30 | Candy Spa | WASHING PROCEDURE FOR WASHING MACHINE |
US5551165A (en) * | 1995-04-13 | 1996-09-03 | Texas Instruments Incorporated | Enhanced cleansing process for wafer handling implements |
DE19528322C2 (en) * | 1995-08-02 | 2002-05-08 | Aeg Hausgeraete Gmbh | Water safety device for household appliances |
IT1289392B1 (en) * | 1996-09-12 | 1998-10-02 | Electrolux Zanussi Elettrodome | METHOD FOR CHECKING THE QUANTITY OF WATER PUT INTO A DISHWASHER |
JPH10179981A (en) * | 1996-12-26 | 1998-07-07 | Sharp Corp | Washing machine |
DE19908804C5 (en) * | 1999-03-01 | 2014-05-15 | BSH Bosch und Siemens Hausgeräte GmbH | Method for operating a washing machine and automatically controlled washing machine for this purpose |
US6269666B1 (en) * | 1999-06-22 | 2001-08-07 | Whirlpool Corporation | Control for an automatic washer with spray pretreatment |
-
1999
- 1999-12-14 DE DE19960265A patent/DE19960265B4/en not_active Expired - Fee Related
-
2000
- 2000-11-08 KR KR1020027007567A patent/KR100734674B1/en not_active IP Right Cessation
- 2000-11-08 WO PCT/EP2000/011040 patent/WO2001044557A1/en active Application Filing
- 2000-11-08 JP JP2001545632A patent/JP2003516837A/en active Pending
- 2000-11-08 EP EP00984989A patent/EP1604058A1/en not_active Withdrawn
-
2002
- 2002-06-14 US US10/171,696 patent/US6698254B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0144557A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20020178764A1 (en) | 2002-12-05 |
DE19960265B4 (en) | 2007-04-12 |
KR20020062969A (en) | 2002-07-31 |
JP2003516837A (en) | 2003-05-20 |
WO2001044557A1 (en) | 2001-06-21 |
US6698254B2 (en) | 2004-03-02 |
DE19960265A1 (en) | 2001-06-21 |
KR100734674B1 (en) | 2007-07-02 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20020715 |
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18D | Application deemed to be withdrawn |
Effective date: 20091014 |