EP0441756A1 - A self-cleaning filter for washing machines - Google Patents
A self-cleaning filter for washing machines Download PDFInfo
- Publication number
- EP0441756A1 EP0441756A1 EP91830026A EP91830026A EP0441756A1 EP 0441756 A1 EP0441756 A1 EP 0441756A1 EP 91830026 A EP91830026 A EP 91830026A EP 91830026 A EP91830026 A EP 91830026A EP 0441756 A1 EP0441756 A1 EP 0441756A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- water
- washing
- discharge
- filtering element
- 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- Withdrawn
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Classifications
-
- 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
- A47L15/4202—Water filter means or strainers
- A47L15/4208—Arrangements to prevent clogging of the filters, e.g. self-cleaning
-
- 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
- D06F39/10—Filtering arrangements
Definitions
- the present invention concerns a filter that, placed downstream of one single charging and discharging pump already known in dish washers and similar, always catches all the circulating waterfor obtaining an optimal washing of the dishes or similar, having only clean, i.e. filtered water, in circulation.
- the filter according to the present invention is kept always clean as it is washed counter-stream and with already filtered (therefore clean) water, each time a water discharge takes place.
- the filtering element is angularly displaced by an electromagnet controlled by the washing programme; the displacement is requested for closing the water passage from the washing whirlpool and, at the same time, opening the discharge that may however be reached by the water only after having passed through the filter washing it counter-stream.
- a dish washer realized according to the present invention comprises a filter with wide holes of the known kind for keeping, upstream of the pump, the great impurities or foreign bodies; furthermore the pump and the corresponding self-cleaning filter, forming the object of the present invention.
- Figures 1 and 2 show a scheme of the filter according to the present invention and the section A-A.
- Figures 3 and 4 show a section according to line B-B of figure 1 of the filter according to the present invention, respectively placed in the water charging phase to the whirlpools and in the discharging phase.
- the water coming from the only pump of the dish washer gets into duct 1 that, where required, may be out of one piece with the pump's outlet.
- the timer that controls thepump for performing the discharge operated an electromagnet 10 that makes rotate the filter body, e.g., of 45°.
- Said filter gets places so as to show to the dirty water only one side provided with the small net, through which the water passes depositing the residuals taken from the dishes; the filtered water is therefore clean and forced to wash counter-stream the other side of the filter from which it takes away the food residuals already placed on the small net and leads them to the discharge 7 which is made accessible due to the rotation of the filter body 3.
- the body 3 of the filter contains a helicoidal spring or any other suitable device which, when pushing on the cover 8, realizes a sealing closing on the internal (circular) surface of the frame 9 of the filter on which are provided the ducts 4 for charging to whirlpools and 7 for discharge.
- a second electromagnet 10 or any other control device moves the filter body 3 in the direction opposite to the precedentone, allowing the counter-stream washing with clean water of the other side of the filter.
- a simple spring game makes filter 3 placed centrally until one of the two electromagnets gets not excited for putting the filter into washing position.
- the water aspired from the recollection basin by means of the pump, before getting to the whirlpools (the lower and the upper one) passes through the filter and leaves inside the same all residuals in circulation.
- the filter In the position exemplified in figure 3, the filter is working on both sides, which makes the whole of the filter's surface disposable.
- the filter At each discharge, the filter is placed, by means of an electromagnet, in such position as to present to the dirty water only one side of the filter, as shown in figure 4; the water passes through said surface and therefore leaves all residuals before washing in counter-stream the surface of the filter.
- the filter gets placed on the opposite side washing in counter-stream the surface of the filter previously used.
- the filter according to the present invention may be automatically controlled following to the exploitation of said pressure variation between inlet and outlet of the fluid from said filter.
- the device according to the present invention which in its structure is extremely simple, may be completely realized out of plastic and its optimal position is at the outlet of the only pump (for charging and discharging) provided in the dish washer.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Washing And Drying Of Tableware (AREA)
Abstract
The device comprises a self-cleaning filtering element (3) that can be partially rotated so as to open a discharge opening (7) and to close the recirculating opening (4), while performing at the same time the counter-stream washing (with already filtered water) on one side of the filtering element (3).
Description
- The present invention concerns a filter that, placed downstream of one single charging and discharging pump already known in dish washers and similar, always catches all the circulating waterfor obtaining an optimal washing of the dishes or similar, having only clean, i.e. filtered water, in circulation.
- Infact, the filter according to the present invention is kept always clean as it is washed counter-stream and with already filtered (therefore clean) water, each time a water discharge takes place.
- For obtaining the aim set forth, the filtering element is angularly displaced by an electromagnet controlled by the washing programme; the displacement is requested for closing the water passage from the washing whirlpool and, at the same time, opening the discharge that may however be reached by the water only after having passed through the filter washing it counter-stream.
- A plurality of systems aiming at least to the partial realization of what described are already known, but the solution according to the present invention seems to be original under the functional and realizing aspect.
- A dish washer realized according to the present invention comprises a filter with wide holes of the known kind for keeping, upstream of the pump, the great impurities or foreign bodies; furthermore the pump and the corresponding self-cleaning filter, forming the object of the present invention.
- The present invention will be described more in detail hereinbelow according to the enclosed drawings, in which a preferred embodiment is shown.
- Figures 1 and 2 show a scheme of the filter according to the present invention and the section A-A.
- Figures 3 and 4 show a section according to line B-B of figure 1 of the filter according to the present invention, respectively placed in the water charging phase to the whirlpools and in the discharging phase.
- Relating now to the details of the figures, the water coming from the only pump of the dish washer (charge and discharge) gets into duct 1 that, where required, may be out of one piece with the pump's outlet.
- From said duct the water just touches, through
chamber 2, the outside offilter 3 that has a parallelepiped shape, rounded at the ends, and on the frame whereof a small net it applied having the desired mesh. The water containing the residuals taken away from the dishes (or in the case of clean water, of soap clots) is filtered by the net surrounding thebody 3 and, once the residuals or the soap not dissolved, enters in thebody 3 passing under pressure throughhole 4 connected to the washing whirlpools. - During this operation the soap that did not melt gets deposited on the small net and is further removed by the water that must pass through the filter.
- Once the washing operation is completed, the timer that controls thepump for performing the discharge operated an
electromagnet 10 that makes rotate the filter body, e.g., of 45°. - Said filter gets places so as to show to the dirty water only one side provided with the small net, through which the water passes depositing the residuals taken from the dishes; the filtered water is therefore clean and forced to wash counter-stream the other side of the filter from which it takes away the food residuals already placed on the small net and leads them to the
discharge 7 which is made accessible due to the rotation of thefilter body 3. - At the same time, and always due to above mentioned rotation of the filter body, the
ends cover 8 offilter 3 alternatively close thepassage 4 of the water to the whirlpools. - The
body 3 of the filter contains a helicoidal spring or any other suitable device which, when pushing on thecover 8, realizes a sealing closing on the internal (circular) surface of the frame 9 of the filter on which are provided theducts 4 for charging to whirlpools and 7 for discharge. - In the following discharge, a
second electromagnet 10 or any other control device moves thefilter body 3 in the direction opposite to the precedentone, allowing the counter-stream washing with clean water of the other side of the filter. - A simple spring game, not shown in the figures, makes
filter 3 placed centrally until one of the two electromagnets gets not excited for putting the filter into washing position. - For what concerns the functioning of the object according to the present invention, the water aspired from the recollection basin by means of the pump, before getting to the whirlpools (the lower and the upper one) passes through the filter and leaves inside the same all residuals in circulation.
- In the position exemplified in figure 3, the filter is working on both sides, which makes the whole of the filter's surface disposable. At each discharge, the filter is placed, by means of an electromagnet, in such position as to present to the dirty water only one side of the filter, as shown in figure 4; the water passes through said surface and therefore leaves all residuals before washing in counter-stream the surface of the filter. At the successive discharge, the filter gets placed on the opposite side washing in counter-stream the surface of the filter previously used.
- In a possible variant, for obtaining the discharge, the filter according to the present invention may be automatically controlled following to the exploitation of said pressure variation between inlet and outlet of the fluid from said filter.
- The device according to the present invention, which in its structure is extremely simple, may be completely realized out of plastic and its optimal position is at the outlet of the only pump (for charging and discharging) provided in the dish washer.
Claims (7)
- A self-cleaning filter for washing machines that catches all the water circulating in the dish washer, leaving on the external surface of the filtering element all residuals found and leading to the whirlpools only the filtered water that has come together inside the filtering element, characterized in a filtering element that is partially rotated so as to open a discharge opening and closing the one for leading the water to the whirlpools, performing at the same time the counter-stream washing (with already filtered water) on one side of the filtering element.
- A self-cleaning filter for washing machines, characterized in a washing treatment of the other side of the filtering element like the one according to claim 1, whereby the latter - always in discharging phase - is slightly rotated in the opposite sense.
- A filter according to the precedent claims, characterized in that once the washing operation is completed the timer controlling the pump for performing the discharge, operates an electromagnet (10) that makes rotate the filter body (3) e.g. of 45°.
- A filter according to the precedent claims, characterized in that in discharge position it gets placed in such a position as to show only one side, provided with a small net, to the dirty water, whereby said dirty water passes through said small net leaving there the residuals taking from the dishes; the filtered and therefore clean water is now forced to wash counter-stream the other side of the filter, from which it takes the food residuals already present on the small net and leads them to the discharge 7 which, due to the rotation of the filter body (3), is now accessible.
- A filter according to claim 4, characterized in that at the same time and always due to the above mentioned rotation of the flter, the ends (5) or (6) being part of the cover (8) of the filter (3), alternatively close the passage (4) of the water to the whirlpools.
- A filter according to the precedent claims, characterized in that in the following discharge, a second electromagnet (10) or othe controlling device, moves the filter body (3) in the direction opposite to the precedent one, thus allowing the counter-stream washing with clean water of the other side of the filter.
- A filter according to the precedent claims characterized in that it is automatically controlled due to the exploitation of said pressure variation between the inlet and the outlet of the fluid.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT4759190 | 1990-02-02 | ||
IT47591A IT1239791B (en) | 1990-02-02 | 1990-02-02 | SELF-CLEANING FILTER FOR DISHWASHING MACHINES. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0441756A1 true EP0441756A1 (en) | 1991-08-14 |
Family
ID=11261297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91830026A Withdrawn EP0441756A1 (en) | 1990-02-02 | 1991-01-30 | A self-cleaning filter for washing machines |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0441756A1 (en) |
IT (1) | IT1239791B (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4131914A1 (en) * | 1991-09-25 | 1993-04-01 | Licentia Gmbh | Sieve combination for domestic dishwasher - has inside fine sieve cylinder provided with cover and centrally around coarse sieve axially rotatable conical micro-sieve |
EP0702928A1 (en) * | 1994-09-22 | 1996-03-27 | Whirlpool Europe B.V. | Method of rinsing in a dishwasher and device for carrying out the method |
WO2011076685A1 (en) * | 2009-12-22 | 2011-06-30 | BSH Bosch und Siemens Hausgeräte GmbH | Filter device, household appliance, and method for filtering |
WO2012049039A1 (en) * | 2010-10-15 | 2012-04-19 | BSH Bosch und Siemens Hausgeräte GmbH | Cleaning device for a component exposed to lint, household appliance for the care of laundry items using such a cleaning device, and method for cleaning a component exposed to lint |
EP2443985A3 (en) * | 2012-02-06 | 2012-07-25 | V-Zug AG | Household advice with filter assembly in drainage system |
US8240321B2 (en) | 2009-12-18 | 2012-08-14 | Whirlpool Corporation | Magnetic drive controlled rotation for dishwasher spray arm |
WO2013079348A3 (en) * | 2011-11-28 | 2013-09-12 | BSH Bosch und Siemens Hausgeräte GmbH | Filter and water-bearing domestic appliance |
WO2019017848A1 (en) * | 2017-07-20 | 2019-01-24 | Planet Care | Method and device for removing particles, preferably microfibers, from waste water |
CN114855430A (en) * | 2022-05-16 | 2022-08-05 | Tcl家用电器(合肥)有限公司 | Washing machine and water purifying device thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2512394A (en) * | 1945-05-12 | 1950-06-20 | Apex Electrical Mfg Co | Self-cleaning lint trap |
US2629390A (en) * | 1946-02-13 | 1953-02-24 | Frank G Walker | Dishwashing machine |
US2649765A (en) * | 1946-07-18 | 1953-08-25 | Landers Frary & Clark | Self-cleaning strainer arrangement for dishwashing machines |
US3429444A (en) * | 1966-10-31 | 1969-02-25 | Whirlpool Co | Cone filter for an automatic washer |
US3774418A (en) * | 1972-03-28 | 1973-11-27 | Whirlpool Co | Integral self-cleaning filter and side check valve for automatic washer |
-
1990
- 1990-02-02 IT IT47591A patent/IT1239791B/en active IP Right Grant
-
1991
- 1991-01-30 EP EP91830026A patent/EP0441756A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2512394A (en) * | 1945-05-12 | 1950-06-20 | Apex Electrical Mfg Co | Self-cleaning lint trap |
US2629390A (en) * | 1946-02-13 | 1953-02-24 | Frank G Walker | Dishwashing machine |
US2649765A (en) * | 1946-07-18 | 1953-08-25 | Landers Frary & Clark | Self-cleaning strainer arrangement for dishwashing machines |
US3429444A (en) * | 1966-10-31 | 1969-02-25 | Whirlpool Co | Cone filter for an automatic washer |
US3774418A (en) * | 1972-03-28 | 1973-11-27 | Whirlpool Co | Integral self-cleaning filter and side check valve for automatic washer |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4131914A1 (en) * | 1991-09-25 | 1993-04-01 | Licentia Gmbh | Sieve combination for domestic dishwasher - has inside fine sieve cylinder provided with cover and centrally around coarse sieve axially rotatable conical micro-sieve |
EP0702928A1 (en) * | 1994-09-22 | 1996-03-27 | Whirlpool Europe B.V. | Method of rinsing in a dishwasher and device for carrying out the method |
US5711325A (en) * | 1994-09-22 | 1998-01-27 | Whirlpool Europe B.V. | Method of rinsing in a dishwasher and device for carrying out the method |
US8240321B2 (en) | 2009-12-18 | 2012-08-14 | Whirlpool Corporation | Magnetic drive controlled rotation for dishwasher spray arm |
CN102686793A (en) * | 2009-12-22 | 2012-09-19 | Bsh博世和西门子家用电器有限公司 | Filter device, household appliance, and method for filtering |
WO2011076685A1 (en) * | 2009-12-22 | 2011-06-30 | BSH Bosch und Siemens Hausgeräte GmbH | Filter device, household appliance, and method for filtering |
CN102686793B (en) * | 2009-12-22 | 2015-07-22 | Bsh家用电器有限公司 | Filter device, household appliance, and method for filtering |
CN103154352A (en) * | 2010-10-15 | 2013-06-12 | Bsh博世和西门子家用电器有限公司 | Cleaning device for component exposed to lint, household appliance for the care of laundry items using such cleaning device, and method for cleaning component exposed to lint |
WO2012049039A1 (en) * | 2010-10-15 | 2012-04-19 | BSH Bosch und Siemens Hausgeräte GmbH | Cleaning device for a component exposed to lint, household appliance for the care of laundry items using such a cleaning device, and method for cleaning a component exposed to lint |
CN103154352B (en) * | 2010-10-15 | 2016-02-17 | Bsh家用电器有限公司 | By cleaning device, accordingly home appliances and the method for the component that Soft flocks load |
EA023610B1 (en) * | 2010-10-15 | 2016-06-30 | Бсх Хаусгерете Гмбх | Cleaning device for a component exposed to lint of a household appliance for the care of laundry items, household appliance for the care of laundry items using such a device, and method for cleaning a component exposed to lint of a household appliance for the care of laundry items |
WO2013079348A3 (en) * | 2011-11-28 | 2013-09-12 | BSH Bosch und Siemens Hausgeräte GmbH | Filter and water-bearing domestic appliance |
EP2443985A3 (en) * | 2012-02-06 | 2012-07-25 | V-Zug AG | Household advice with filter assembly in drainage system |
WO2019017848A1 (en) * | 2017-07-20 | 2019-01-24 | Planet Care | Method and device for removing particles, preferably microfibers, from waste water |
EP3655365B1 (en) * | 2017-07-20 | 2022-06-08 | Planet Care Resitve za okolje, d.o.o | Method and device for removing particles from waste water |
CN114855430A (en) * | 2022-05-16 | 2022-08-05 | Tcl家用电器(合肥)有限公司 | Washing machine and water purifying device thereof |
CN114855430B (en) * | 2022-05-16 | 2024-04-30 | Tcl家用电器(合肥)有限公司 | Water purifying device of washing machine and washing machine |
Also Published As
Publication number | Publication date |
---|---|
IT1239791B (en) | 1993-11-15 |
IT9047591A0 (en) | 1990-02-02 |
IT9047591A1 (en) | 1991-08-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB SE |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19920215 |