EP1204792A1 - Laundry treating machine - Google Patents
Laundry treating machineInfo
- Publication number
- EP1204792A1 EP1204792A1 EP00956360A EP00956360A EP1204792A1 EP 1204792 A1 EP1204792 A1 EP 1204792A1 EP 00956360 A EP00956360 A EP 00956360A EP 00956360 A EP00956360 A EP 00956360A EP 1204792 A1 EP1204792 A1 EP 1204792A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating chamber
- tub
- laundry
- laundry treatment
- pumping device
- 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
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/04—Heating 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
Definitions
- the invention relates to a laundry treatment machine comprising a tub, a laundry drum holding items of laundry, which is rotatably arranged in the tub, a pump-around device with a pump for recirculating
- a laundry treatment machine is, in particular, one within the scope of the invention
- Washing machine can also be a machine for washing and / or impregnating laundry items. These additional functions can also be integrated in a washing machine.
- a laundry treatment machine of this type is known from EP 0 464 776 A1. It shows a washing machine with a cylindrical tub and with a rotatable laundry drum arranged coaxially therein. At least one electric heating element is arranged between the deepest point of the tub and the laundry drum. The lowest point of the tub is in flow communication with a container located below it. At the lowest point of the container there is a pump-over inlet opening of a pump-around device for the recirculation of alkali back into the suds container in the upper region thereof. Furthermore, at a deepest point in the container there is a pump-off inlet opening of a pump-off device for pumping out lye at the end of a washing process. There is a pump in each of the two devices.
- a pump-bypass inlet opening is formed in the wall of the tub, through which the pump of the pump-around device can also draw in tubing.
- a control device switches the pump of the pumping device to full load operation when the suds level in the tub is above the pump bypass inlet opening, whereas this pump is automatically switched to idle mode when the liquor level in the tub drains below the upper edge of the pump bypass inlet opening.
- the pump bypass inlet opening is located just above the lowest point of the laundry drum. This ensures that the alkali level is always sufficiently above the electrical heating element to avoid dry operation of the heating element.
- the pump of the pumping device sucks the container under the tub only when the level reaches beyond the pump bypass inlet opening.
- the control device automatically opens a fresh water supply line for supplying fresh water to the tub when the level drops below the pump bypass inlet opening. If possible, there should only be as much water in the tub as can be sucked up by the laundry in the drum.
- An automatically controlled washing machine is known from DE 43 32 225 A1, in which an electric heating element is arranged on the pressure side of a pump of a pumping device.
- Fresh water from a fresh water line passes through a detergent container into which detergent or dishwashing liquid or another laundry treatment agent can be introduced into the tub and thus also rinses this laundry treatment agent into the tub and through it into the laundry drum.
- Radiators should be adequately covered with water in all operating situations. This is usually achieved by filling the tub with water before the heating phase begins until a water level is reached at which the radiator is covered with water. This level can be detected by pressure switches attached to the lower part of the tub or the pump sump, by measuring the dynamic pressure on the pump pressure side of the pumping device or by a paddle switch in the flow path of the pumping device (DE 43 32 225 A1).
- a disadvantage of the known arrangements is that due to the turbulence in the wash liquor caused by the movement of the laundry drum, a lye level must be set which is clearly above the radiator. A reduction in the free liquor during the heating phase is therefore limited by this level.
- the "free liquor” is the portion of the wash liquor that is not absorbed by the laundry.
- the object of the invention is to achieve a possibility in a laundry treatment machine with a pump-around device for recirculating the laundry treatment liquid, by means of which the free liquor (the liquid not sucked up by the laundry items) can be reduced while maintaining a sufficient amount Covering the radiator with the liquid.
- This object is achieved according to the invention in that the at least one radiator is arranged in a heating chamber which has side walls which are closely adjacent to the radiator and which extend downward away from the circumferential course of the tub, and in that the inlet opening of the pumping device in the chamber is arranged above the at least one radiator.
- the invention has the advantage that the proportion of the free liquor is significantly reduced and at the same time the minimum amount of water required to always sufficiently cover the radiator with liquid can also be reduced.
- the chamber is through a in the wall of the
- Alkaline container formed, extending trough formed.
- a heating chamber housing is attached to the underside of the tub, which is in flow connection with the deepest point of the tub through a through opening.
- a discharge inlet opening of a pumping device is connected to a deepest point of the heating chamber.
- a non-return valve is preferably arranged, which opens automatically during pumping operation and is otherwise closed.
- the non-return valve is preferably a check valve.
- an electrical control device and a fresh water supply device are provided for the controlled supply of fresh water into the drum as a function of the liquid level at the pump-around inlet opening.
- the electrical control device is preferably part of the control device which is present in washing machines and which contains a number of optional washing programs and, if appropriate, further laundry treatment programs.
- 1 schematically shows a laundry treatment machine according to the invention
- 2 schematically shows a further embodiment of a laundry treatment machine according to the invention
- the laundry treatment machine according to the invention is preferably a washing machine, but can also be another machine for rinsing or strengthening the laundry with tonic or otherwise treating the laundry with liquid.
- a washing machine can incorporate all of these laundry treatment functions in the form of various programs.
- a laundry drum 6 which is rotatably mounted about a horizontal axis of rotation.
- laundry items 8 are indicated, which are lifted by carriers 10 on the inner circumference of the laundry drum 6 when this laundry drum 6 is rotated and fall down again.
- the items 8 of laundry are constantly rearranged.
- Fresh water is introduced into the laundry drum 6 from an open-close valve 14 from a fresh water line 12 through a detergent container 16, which can contain detergent, detergent, laundry starch or other laundry treatment agent.
- the valve 14 is connected to an electronic control device 18. For constant flooding of the laundry items 8 with the treatment liquid is one
- Pumping device 20 provided with a pump 22, a suction line 24 on the suction side and a pressure line 26 on the pressure side of the pump 22.
- the pressure line 26 recirculates the treatment liquid from the lower end of the washing drum 6 or the tub 4 back into the washing drum 6 onto the laundry items 8.
- the tub 4 is provided at its lower end (bottom) with a downwardly shaped trough 28 which forms a heating chamber 30 forms, in which at least one electric heater 32 is arranged, preferably a tubular heater.
- a pumping-over inlet opening 34 of the suction line 24 of the pumping device 20 is formed in a side wall 36 so far above the radiator 32 that even when the liquid level of the free liquor of the treatment liquid in the trough 28 drops
- Radiator 32 still sufficiently with treatment liquid (washing or rinsing solution or the like) is covered to avoid vapor bubble formation over the heater 32 and overheating of this heater 32.
- Trough 28 is held just above the radiator 32, this level being defined by the upper edge of the pumping inlet opening 34. Only in order to avoid excessively short switch-on / switch-off frequencies of the fresh water valve 14 is the liquid level in the trough 28 filled to a point just above the upper edge of the pumping inlet opening 34, but preferably not via the trough
- the suction line 40 of the pump 42 of a pumping device 44 is connected in terms of flow.
- a pressure line 46 On the pressure side of the pump 42 there is a pressure line 46, preferably a hose, for discharging the treatment liquid from the trough 28 and thus from the entire washing machine.
- non-return valve 48 In the transition between the trough 28 and the suction line 40 there is a non-return valve 48, preferably in the form of a check valve. This non-return valve 48 is automatically closed when the liquid pressure in the suction line 40 of the pumping device 44 is greater than in the trough 28. This prevents treatment liquid from flowing back into the trough 28 from the pressure line 46 when the pump 42 of the pumping device 44 is switched off.
- the pressure line 46 (hose) of the pumping device 44 extends from the pump 42 arranged at the bottom of the machine up to a height which is essential is higher than the maximum liquid level in and above the trough 28.
- the liquid pressure arising in it through the switched-off pump 42 and the suction line 40 up to the non-return valve 48 is greater than the liquid pressure in the trough 28.
- the non-return valve 48 is also then closed when the pump 22 of the pumping device 20 treatment liquid from the trough 28 into the laundry drum
- the backflow stop can be forced into the closed position, for example by spring means, the backflow stop opening automatically in all cases when the pump 42 of the pumping device 44 is switched on.
- the trough 28 can be an integral part of the tub 4.
- heating chamber 30 is not formed in a trough of the tub 4, but by a heating chamber housing 50 adjoining the lower end of the tub 4 is, which via a vertical through opening 52 (preferably a longitudinal slot) with the interior of the
- Suds container 4 is in flow connection at its lower end.
- the passage opening 52 has a substantially smaller horizontal cross-section than the heating chamber 30. This avoids even more than in Fig. 1 that 6 rotary movements of the treatment liquid over the radiator 32 occur due to rotational movements of the washing drum, which, when taking the minimum level into account, to avoid overheating of the radiator would have to be taken into account.
- the heating chamber 30 of FIG. 2 can have a smaller height than the heating chamber 30 of FIG. 1. However, this also reduces the amount of free liquor in the treatment liquid.
- the same parts as in Fig. 1 are provided with the same reference numerals in Fig. 2.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200030703T SI1204792T1 (en) | 1999-07-30 | 2000-07-31 | Laundry treating machine |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19935987A DE19935987A1 (en) | 1999-07-30 | 1999-07-30 | Laundry treatment machine |
DE19935987 | 1999-07-30 | ||
PCT/EP2000/007389 WO2001009426A1 (en) | 1999-07-30 | 2000-07-31 | Laundry treating machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1204792A1 true EP1204792A1 (en) | 2002-05-15 |
EP1204792B1 EP1204792B1 (en) | 2005-04-06 |
Family
ID=7916679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00956360A Expired - Lifetime EP1204792B1 (en) | 1999-07-30 | 2000-07-31 | Laundry treating machine |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1204792B1 (en) |
AT (1) | ATE292704T1 (en) |
DE (2) | DE19935987A1 (en) |
ES (1) | ES2240149T3 (en) |
PL (1) | PL201980B1 (en) |
TR (1) | TR200200031T2 (en) |
WO (1) | WO2001009426A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2455532A1 (en) | 2010-11-22 | 2012-05-23 | Electrolux Home Products Corporation N.V. | Washing machine |
EP2455533A1 (en) | 2010-11-22 | 2012-05-23 | Electrolux Home Products Corporation N.V. | Method of operating a washing machine and washing machine |
EP2998426A1 (en) | 2014-09-16 | 2016-03-23 | Electrolux Appliances Aktiebolag | Washing machiine having an improved valve/filter assembly |
US10000885B2 (en) | 2013-07-04 | 2018-06-19 | Dongbu Daewoo Electronics Corporation | Washing machine and washing method thereof |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10209975A1 (en) * | 2002-03-07 | 2003-09-25 | Bsh Bosch Siemens Hausgeraete | Electrically heated washing machine |
KR20080087597A (en) | 2007-03-27 | 2008-10-01 | 삼성전자주식회사 | Washing machine |
EP2503050B1 (en) | 2011-03-24 | 2013-12-18 | Electrolux Home Products Corporation N.V. | Washing machine comprising a filter element |
EP2535454B1 (en) | 2011-06-14 | 2021-05-12 | Electrolux Home Products Corporation N.V. | Washing machine |
EP2570544A1 (en) * | 2011-09-15 | 2013-03-20 | Electrolux Home Products Corporation N.V. | Washing machine |
DE102015212738A1 (en) | 2015-07-08 | 2017-01-12 | BSH Hausgeräte GmbH | Laundry care device and laundry care process |
DE102015212742A1 (en) | 2015-07-08 | 2017-01-12 | BSH Hausgeräte GmbH | Laundry care device and laundry care process |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3401899A1 (en) * | 1984-01-20 | 1985-07-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Drum-type washing machine for domestic use |
IT1181078B (en) * | 1984-11-20 | 1987-09-23 | Zanussi Elettrodomestici | WASHING MACHINE |
IT1246260B (en) * | 1990-07-03 | 1994-11-17 | Zanussi Elettrodomestici | WATER LOAD MEASURING DEVICE FOR WASHING MACHINES. |
DE4332225B4 (en) * | 1993-06-07 | 2006-09-28 | BSH Bosch und Siemens Hausgeräte GmbH | Automatically controlled washing machine |
-
1999
- 1999-07-30 DE DE19935987A patent/DE19935987A1/en not_active Withdrawn
-
2000
- 2000-07-31 PL PL354460A patent/PL201980B1/en not_active IP Right Cessation
- 2000-07-31 ES ES00956360T patent/ES2240149T3/en not_active Expired - Lifetime
- 2000-07-31 TR TR2002/00031T patent/TR200200031T2/en unknown
- 2000-07-31 AT AT00956360T patent/ATE292704T1/en not_active IP Right Cessation
- 2000-07-31 EP EP00956360A patent/EP1204792B1/en not_active Expired - Lifetime
- 2000-07-31 WO PCT/EP2000/007389 patent/WO2001009426A1/en active IP Right Grant
- 2000-07-31 DE DE50010001T patent/DE50010001D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0109426A1 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2455532A1 (en) | 2010-11-22 | 2012-05-23 | Electrolux Home Products Corporation N.V. | Washing machine |
EP2455533A1 (en) | 2010-11-22 | 2012-05-23 | Electrolux Home Products Corporation N.V. | Method of operating a washing machine and washing machine |
US9702079B2 (en) | 2010-11-22 | 2017-07-11 | Electrolux Home Products Corporation N.V. | Washing machine with recirculation circuit |
US10000885B2 (en) | 2013-07-04 | 2018-06-19 | Dongbu Daewoo Electronics Corporation | Washing machine and washing method thereof |
EP2998426A1 (en) | 2014-09-16 | 2016-03-23 | Electrolux Appliances Aktiebolag | Washing machiine having an improved valve/filter assembly |
Also Published As
Publication number | Publication date |
---|---|
PL201980B1 (en) | 2009-05-29 |
DE50010001D1 (en) | 2005-05-12 |
PL354460A1 (en) | 2004-01-12 |
ATE292704T1 (en) | 2005-04-15 |
WO2001009426A1 (en) | 2001-02-08 |
DE19935987A1 (en) | 2001-02-01 |
EP1204792B1 (en) | 2005-04-06 |
ES2240149T3 (en) | 2005-10-16 |
TR200200031T2 (en) | 2002-05-21 |
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