EP2038467A1 - Method for handling laundry with a variable wetting duration and corresponding washing machine - Google Patents
Method for handling laundry with a variable wetting duration and corresponding washing machineInfo
- Publication number
- EP2038467A1 EP2038467A1 EP07730035A EP07730035A EP2038467A1 EP 2038467 A1 EP2038467 A1 EP 2038467A1 EP 07730035 A EP07730035 A EP 07730035A EP 07730035 A EP07730035 A EP 07730035A EP 2038467 A1 EP2038467 A1 EP 2038467A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydrostatic pressure
- water
- sub
- tub
- washing machine
- 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
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
- D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
- D06F33/34—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of water filling
-
- 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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
-
- 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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/38—Time, e.g. duration
-
- 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
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
- D06F2105/48—Drum speed
Definitions
- the invention relates to a method for the treatment of laundry with variable network duration in a program-controlled washing machine and a suitable for carrying out this method washing machine.
- the invention relates to a method for the treatment of laundry, in which a wetting phase between a predetermined minimum and a predetermined maximum period of time can be made variable.
- an electromagnetic water level controller (water level sensor) is generally used, which controls the water supply.
- the supply of water is controlled at a corresponding valve within a level or pressure hysteresis on the water level controller between two switching points.
- the valve When the valve is open, the tub is filled until an upper switching point (ie upper hydrostatic pressure) P 1 is reached. Then the valve is closed and thus the water supply is interrupted.
- the water in the tub is taken up by the laundry to be moistened (to be moistened), so that the hydrostatic pressure in the tub sinks. If a lower switching point (ie lower limit for the hydrostatic pressure) p 2 is exceeded, the valve is opened again and the water supply to the tub again added. Water is then fed again until the upper switching point is reached, etc.
- the duration of the network phase in a washing machine with exclusively electromagnetic water level controller is usually specific for each program step, regardless of the type of loading and load, fixed. This defined fixed duration guarantees in most cases a clear wash, that the necessary amount of water is introduced into the tub of the washing machine. With a badly absorbent laundry item, a water level controller in minus-tolerance or too low a pressure in the public water supply to which the washing machine is connected, the amount of water in the clearing may be too low, and it may lead to a delayed re-drawing of water come.
- DE 10 2004 039 662 A1 describes a program-controlled washing machine with a wetting process which can be adapted to the amount of laundry in a laundry drum rotatably mounted in a tub about a non-vertical axis by means of a water supply system and a control device.
- the control device By the control device, the feed of water into the tub is time controllable, wherein the wetting process in as many phases (Ph1 to Ph3) is divided, as quantity levels (small, medium, large) are provided for the laundry to be treated.
- An object of the invention is to provide a method for treating laundry in a program-controlled washing machine with an electromagnetic water level controller, in which the wetting phase can be made flexible and the necessary amount of water for the complete wetting of laundry items for the laundry wash can be better adjusted.
- the object is also to show a suitable for carrying out this process washing machine.
- the invention thus relates to a method for the treatment of laundry in a program-controlled washing machine with a tub, a rotatably mounted drum, and a water level sensor for determining the hydrostatic pressure p of the liquid in the tub, in the water via a preset hysteresis the tub up to a predetermined hydrostatic pressure P 1 is supplied, wherein the hysteresis is the pressure difference between the hydrostatic pressure P 1 at the upper switching point for the water supply and the hydrostatic pressure p 2 at the lower switching point for the water supply, so that first
- step (D) the water supply according to step (a) is terminated when
- (d1) is the sum of the periods ti to t n is greater than a predetermined value t max, or (d2) the period of time t n is greater than a predetermined time period t is m ⁇ n.
- the value t min is adjusted so that it is the desired time, which on average according to the suction characteristics different laundry items and the defined hysteresis of the water level controller between two stuffing butts towards the end of the net phase corresponds to needed, corresponds.
- the value t max is selected taking into account energy efficiency, time and possible water leaks.
- the hydrostatic pressure p measured with the aid of the water level sensor can be compared with the amount of water charged.
- the laundry in the drum absorbs water, which therefore can not contribute to an increase in the hydrostatic pressure.
- corresponding properties especially size or mass and type of the textiles contained
- the amount of laundry and its degree of permeability (wetting degree) determine. As a result, the wetting phase can be tuned very precisely to the given batch of laundry.
- step (a) the supply of water into the tub via a preset hysteresis, preferably via a small hysteresis.
- "Hysteresis” in the sense of the invention is the pressure difference between the pressure at the upper switching point pi for the water supply and the pressure p 2 at the lower switching point for the water supply Pa, more preferably from 20 to 100 Pa, and most preferably in the range from 30 to 70 Pa.
- condition (d1) or condition (d2) it is generally assumed that the laundry to be treated is sufficiently moistened. In general, it will complete the wetting phase and begin a washing process. However, another method step may initially be carried out, to which then usually a conventional washing process is followed. In particular, according to a further embodiment of the invention, it can be decided on the basis of the size of the laundry item which may be determined in method step (a) and / or (b) whether further treatment steps are carried out. In this case, if necessary, the water supply can also be interrupted.
- the drum during the execution of the process steps (a) and / or (b) is rotated, preferably with a number of revolutions of 25 to 50 revolutions per minute (rpm).
- the direction of rotation of the drum corresponds to a direction of effectiveness of a scooping device.
- the laundry is thoroughly moistened, so that the amount of the accumulated water can be determined even more accurately or the wetting can be performed more efficiently.
- a measuring device may be present, for example a time measuring device for determining the opening period of a valve for the inlet of water or a liquid quantity measuring device for measuring the amount of liquid filled.
- the invention also relates to a washing machine with a program control for controlling the program flow, a rotatably mounted in a tub drum for receiving laundry, a drive motor for the drum, a water level sensor for determining the amount of liquid in the tub and means for controlling a water inlet wherein the means in conjunction with the water level sensor can perform the method according to the invention described above or one of its developments also described above. Embodiments of the invention are described below with reference to Figures 1 and 2.
- FIG. 1 is a schematic representation of the time course of a wetting phase in a process for the treatment of laundry.
- this speed and direction of rotation of a drum of a washing machine and the recessed volume of water as a function of time are shown.
- FIG. 1 illustrates how the times t for the program steps (a) and (b) increase with increasing duration of the wetting phase.
- the drum is rotated in different directions for a specific time.
- FIG. 2 is a schematic representation of the presently relevant parts of a washing machine, in which the method described above can be performed.
- the washing machine has a tub 1, in which a drum 2 is rotatably mounted and can be operated by a drive motor 14.
- the rotation axis 3 of the drum 2 is directed from the horizontal by a small angle (for example 13 °) forwardly upwards, so that one has easier access and insight into the interior of the drum 2.
- the washing machine also has a liquor inlet system 9, 10, 1 1, which includes a water connection fitting for the domestic water network 8, an electrically controllable valve 9 and a supply line 10 to the tub 1, which may optionally also be guided via a dispenser 1, from the the incoming water Can carry detergent portions in the tub 1.
- a heater 13 in the tub 1, a heater 13.
- the valve 9 as well as the heater 13 can be controlled by a control device or program control 12 in response to a flowchart, the to a time program and / or to the achievement of certain measurements of parameters such as liquor level , Laugentemperatur, rotational speed of the drum, etc. within the washing machine, in particular to the predetermined in the process steps (a) and (b) hydrostatic pressures pi and p 2 may be bound.
- 15 denotes a water level sensor for the measurement of the hydrostatic pressure p in the tub 1.
- the method has the advantage that even in washing machines with exclusively electromechanical water level controller, the main wash water quantity is not too low despite the tolerance of the water level sensors and the characteristic features of the laundry load in terms of pumping speed and volume at the end of the network phase.
- the unwanted tightening of water in the heating phase or the washing phase is prevented.
- the load value which may possibly be determined via a load detection by comparing hydrostatic pressure and filled amount of water and would be too low for late tightening of water, is better approximated.
- the amount of laundry to be treated can be estimated in a simple and reliable manner in order to adapt the further course of the wetting phase. In particular, it is easy to differentiate between different items of laundry.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006029670A DE102006029670A1 (en) | 2006-06-28 | 2006-06-28 | Process for the treatment of laundry with variable net duration and suitable washing machine |
PCT/EP2007/055685 WO2008000610A1 (en) | 2006-06-28 | 2007-06-11 | Method for handling laundry with a variable wetting duration and corresponding washing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2038467A1 true EP2038467A1 (en) | 2009-03-25 |
EP2038467B1 EP2038467B1 (en) | 2018-08-22 |
Family
ID=38430431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07730035.8A Active EP2038467B1 (en) | 2006-06-28 | 2007-06-11 | Method for handling laundry with a variable wetting duration and corresponding washing machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2038467B1 (en) |
DE (1) | DE102006029670A1 (en) |
WO (1) | WO2008000610A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103290650A (en) * | 2012-02-24 | 2013-09-11 | 博西华电器(江苏)有限公司 | Control method of washing machine |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008031249A1 (en) | 2008-07-02 | 2010-01-14 | BSH Bosch und Siemens Hausgeräte GmbH | Pressure sensor calibrating method for washing machine, involves changing liquid level in container over pre-determined time period, and measuring value marginally between phases, where value is equated with highest liquid level below drum |
KR101460540B1 (en) * | 2008-07-21 | 2014-11-12 | 삼성전자 주식회사 | Method to control of washing machine |
DE102009029240A1 (en) * | 2009-09-07 | 2011-03-10 | BSH Bosch und Siemens Hausgeräte GmbH | Method for handling clothes in program-controllable washing machine with liquor outflow system, involves adding predetermined water amount in drum |
EP2458062A1 (en) | 2010-11-29 | 2012-05-30 | Electrolux Home Products Corporation N.V. | Method for controlling the intake of washing liquid in a laundry washing machine, and laundry washing machine actuating the method |
DE102013225113B4 (en) | 2013-12-06 | 2019-01-31 | BSH Hausgeräte GmbH | Process for the treatment of laundry with improved wetting phase and suitable washing machine for this purpose |
EP4219820A4 (en) * | 2020-09-27 | 2024-02-28 | Qingdao Haier Drum Washing Machine Co., Ltd. | Washing machine and control method therefor |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4141213C2 (en) * | 1991-12-13 | 1996-12-12 | Bosch Siemens Hausgeraete | Method for determining the dry weight of laundry, the water level and the bound liquor in a drum washing machine and washing machine for carrying out the method |
DE4304031A1 (en) * | 1993-02-11 | 1994-08-18 | Licentia Gmbh | Drum washing machine with a program sequence control device |
IT1261007B (en) * | 1993-10-26 | 1996-04-29 | Merloni Elettrodomestici Spa | METHOD FOR DETERMINING THE QUANTITY AND / OR TYPE OF FABRIC INTRODUCED IN A WASHING MACHINE, AND A WASHING MACHINE THAT IMPLEMENTS THIS METHOD. |
IT1267603B1 (en) * | 1994-12-13 | 1997-02-07 | Zanussi Elettrodomestici | WASHING MACHINES WITH PERFECTED DEVICES FOR DETERMINING THE TYPE OF FABRIC |
DE10136519B4 (en) * | 2001-07-26 | 2004-09-02 | BSH Bosch und Siemens Hausgeräte GmbH | Method of operating a programmable washing machine and washing machine suitable therefor |
DE102004039662A1 (en) * | 2004-08-16 | 2006-02-23 | BSH Bosch und Siemens Hausgeräte GmbH | Program-controlled washing machine |
DE102005003696A1 (en) * | 2005-01-26 | 2006-07-27 | BSH Bosch und Siemens Hausgeräte GmbH | A method for reducing the risk shrinking delicate washing materials in horizontal axis clothes washing machines has short drum rotations all in the same direction to drain trapped liquor on the clothes |
-
2006
- 2006-06-28 DE DE102006029670A patent/DE102006029670A1/en not_active Withdrawn
-
2007
- 2007-06-11 EP EP07730035.8A patent/EP2038467B1/en active Active
- 2007-06-11 WO PCT/EP2007/055685 patent/WO2008000610A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2008000610A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103290650A (en) * | 2012-02-24 | 2013-09-11 | 博西华电器(江苏)有限公司 | Control method of washing machine |
Also Published As
Publication number | Publication date |
---|---|
EP2038467B1 (en) | 2018-08-22 |
DE102006029670A1 (en) | 2008-01-03 |
WO2008000610A1 (en) | 2008-01-03 |
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