EP0705561B1 - Flow regulating device for the selective feeding of a dishwasher spraying-arms - Google Patents
Flow regulating device for the selective feeding of a dishwasher spraying-arms Download PDFInfo
- Publication number
- EP0705561B1 EP0705561B1 EP95202604A EP95202604A EP0705561B1 EP 0705561 B1 EP0705561 B1 EP 0705561B1 EP 95202604 A EP95202604 A EP 95202604A EP 95202604 A EP95202604 A EP 95202604A EP 0705561 B1 EP0705561 B1 EP 0705561B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotors
- wire
- feed pipes
- lever
- movement
- 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.)
- Expired - Lifetime
Links
- 230000001105 regulatory effect Effects 0.000 title 1
- 238000005406 washing Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 7
- 230000009347 mechanical transmission Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000013459 approach Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
- A47L15/4219—Water recirculation
- A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms
Definitions
- the present invention relates to a device for controlling a valve device which regulates the flow of washing liquid, for feeding the spraying rotors of a dishwasher machine selectively.
- a device for controlling the flow of washing liquid placed between the delivery of the washing pump and the feed pipes of the two spraying rotors (upper rotor and lower rotor), which pipes are positioned inside the washing tub of the dishwasher.
- This device comprises a membrane which is moved by an actuator between two working positions, in one of which both the pipes for feeding the rotors are open, while in the other position the pipe for feeding the lower rotor is closed, so as to allow feeding of the upper rotor alone.
- the dishwasher can be programmed for feeding a smaller volume of water than that required for washing a complete load, without thereby giving rise to pressure drop problems or even cavitation of the washing pump, in that it is possible to feed only one of the rotors (preferably the upper one).
- the object of the present invention is that of providing a device for controlling a valve device which regulates the flow of washing liquid feeding the spraying rotors.
- a device for controlling a valve device which regulates a flow of washing liquid and which is placed between means for pumping the washing liquid and two feed pipes of two respective spraying rotors of a dishwasher, for selective feeding of said rotors characterised in that it comprises means for selecting the working condition of said valve device housed in a control panel of the dishwasher and operatively connected to said valve device by mechanical transmission means.
- FR-A-2 443 231 and EP-A-0 054 448 also disclose dishwashers with the pre-characterizing claim 1 features.
- a fully mechanical device for controlling a valve device which regulates the feed flow of the rotors.
- a control device comprises a knob 1 rotatably housed in a respective circular seat formed in a control panel 2, mounted in turn on a door 3 of a dishwasher.
- the knob 1 is coupled to a small shaft 4 whereto a fork lever 5 is integrally attached, between whose two prongs 51 a small wire 6 is slidingly inserted and ending in a small ball 7, greater in diameter than the distance between the aforementioned prongs 51 (Figs. 1-3).
- the lever 5 allows the rotational movement of the knob 1 to be transformed into the translational movement of the wire 6.
- a first cam 8 is also attached to the shaft 4 and co-operates with an underlying positioning element 9 to determine three angular lock positions (indicated to a user by the alignment of one of three indices "A", "B” and “C” on the knob 1 with a reference notch 52 on the control panel 2, as can be seen in Fig. 4), and a further two cams 10 and 11, each of which determines, in a respective angular position of the knob 1, closure of an electrical contact between respective electrical terminals 12, 12' and 13, 13' (Figs. 1 and 3). The function of these electrical contacts is to be explained hereinbelow in the description.
- the panel 2, near the knob 1, is also connected to a stretching device 53, which can be seen in a sectioned view in Figure 2.
- the stretching device 53 substantially consists of a hollow cylinder 54, inside whereof a helical spring 55 is housed, which acts on a nut 56, integral with the wire 6, so as to force the wire 6 into a position of minimum extension (a position shown by an unbroken line in Figure 2): this guarantees that the wire 6 is always kept tight.
- the spring 55 also acts as a return spring for the wire 6 when, by rotating the knob 1, there is a change from a condition of maximum extension to a condition of minimum extension of the wire 6 itself (for example, from position "C" to positions "B” or "A”).
- the stretching device 53 is also provided with a regulation element 57 which can be screwed into the cylinder 54 and which acts as a contrast to the nut 56. By screwing or unscrewing the regulation element 57, the various tolerances can be compensated.
- the wire 6 is slidingly inserted in a sheath 14.
- the sheath 14 extends vertically along the wall of the door 3, and then is inserted in a gap between a washing tub 40 and a base surface 41 of the dishwasher, so as not to interfere with the door 3 during rotation through almost 90° for opening of the dishwasher.
- the wire 6 is connected at the opposite end to a valve device 15 which regulates the flow of washing liquid, which device is placed between the delivery 42 of a washing pump 43 and two feed pipes 44 and 45 of two respective spraying rotors 46 and 47 positioned inside the washing tub 40 (Fig. 8).
- the rotor 46 lower rotor
- the rotor 47 upper rotor
- the rotor 46 is placed substantially on the base of the washing tub 40, below a first loading rack (not shown)
- the rotor 47 upper rotor
- the valve device 15 substantially comprises a cylindrical conduit 48, divided internally by a baffle 49 into two semi cylindrical conduits 30 and 31 (Figs. 12 and 13), connected to the feed pipe 44 and to the feed pipe 45 respectively (Figs. 9-11).
- a blade 16 integral with a rotary pin 17 (Figs. 9-11) whereto a fork lever 18, similar to the lever 5, is attached (Figs. 8 and 12).
- the wire 6 is slidingly inserted between the prongs 32 and 33 of the lever 18, and a small ball 19 is attached at its end, with diameter greater than the distance between said prongs.
- Rotating the knob 1 causes rotation of the shaft 4 and, consequently, that of the lever 5 integral therewith.
- the latter causes sliding of the wire 6 inside the sheath 14, and hence rotation of the lever 18.
- the three working positions "A", "B” and “C” of the knob 1 are translated into the same number of angular positions of the blade 16.
- one of the contacts between the electrical terminals 12, 12' and 13, 13' closes so as to signal to a device (not shown) for measuring the volume of water to be fed that the dishwasher has been programmed to perform washing of a reduced load, and hence the volume of water to be fed is equal to the volume foreseen for this reduced load.
- a device for measuring the volume of water to be fed that the dishwasher has been programmed to perform washing of a reduced load, and hence the volume of water to be fed is equal to the volume foreseen for this reduced load.
- MI94A001078 Such a measuring device is for example described in the Italian patent Application no. MI94A001078.
- the dishwasher can therefore be used traditionally for washing a complete load of twelve table settings, feeding both rotors, or it can be programmed to wash a reduced load, for example six table settings, using either the upper rack or the lower rack, according to needs, and quite simply by actuating the knob 1.
- the knob 1 is replaced by a cursor 20, in plastic for example, housed vertically slidingly in the control panel 2 of the door 3.
- the cursor 20 has a grip 21 projecting from the panel 2 through a slot 22.
- the wire 6 is restrained to the cursor 20 by means of the end ball 7.
- no lever is provided, in that the movement of the cursor 20 is already translational.
- the cursor 20 is provided with a lateral appendage 23 integral with the cursor 20 and relatively flexible, which can be engaged in three respective positioning notches 24 formed in the panel 2.
- Each of the notches 24 causes the cursor 20 to stop in a position wherein a reference notch 60, formed on the grip 21, is aligned with a respective index "A", "B” or “C” (Fig. 7).
- the cursor 20 is also provided with a pair of cams 25 which, following sliding of the cursor 20 itself, cause actuation of a lever 26 of a microswitch 27, whose function is that of closing the electrical contacts between the electrical terminals 12, 12' and 13, 13'.
- the operating principle of the cursor 20 is the same as the knob 1, with the sole exception that the movement of selecting the position of the blade 16 is translational rather than rotational.
- FIGS 14-18 show a third embodiment of the present invention.
- a knob 1 is again provided, rotatingly housed in a respective circular seat formed in the control panel 2.
- the knob 1 is integral with a shaft 4 of an electric motor 38.
- a cam 39 is also integral with the shaft 4.
- a tilting lever 28, with its fulcrum in 29 at the panel 2 is provided with a cog 70 which engages with the cam 39.
- the wire 6 is attached to the lever 28.
- the cam 39 is substantially a disk having a first segment 71 with a smaller radius, a second segment 72 with a larger radius and a third segment 73 with intermediate radius.
- the first and second segments 71, 72 have substantially equal width, while the third segment 73 has a much smaller width than the first two.
- the control device can operate both manually and automatically.
- a reference notch 74 located on the knob itself, is brought into one of three circular segments indicated as "A", "B” and “C” on the panel 2 (Fig. 18).
- the cam 39 is rotated so that the cog 70 of the lever 28 engages with the segment 73 with intermediate radius (Fig. 15).
- the lever 28 makes the wire 6 extend, and the blade 16 moves into the position of Figure 10.
- the cam 39 is rotated in such a way that the cog 70 engages with the segment 71 of smaller radius (Fig. 16).
- the motor 38 is started up, and the cam 39 is made to rotate automatically: the static conditions described above become dynamic conditions.
- the cog 70 of the lever 28 engages in sequence with the three segments 71-73 of the cam 39, the time of permanence in each segment depending on the speed of rotation of the motor and of the width of the segment itself. Since the width of the segment 73 is much smaller than that of the segments 71 and 72, the phase of simultaneous opening of the two feed pipes 44 and 45 of the two rotors is a brief transition phase, and substantially the upper rotor and the lower rotor are actuated alternately.
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Washing And Drying Of Tableware (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Claims (12)
- Control device for a valve device (15) which regulates a flow of washing liquid and which is placed between means (43) for pumping the washing liquid and two feed pipes (30,44,31,45) of two respective spraying rotors (46,47) of a dishwasher for feeding said rotors (46,47) selectively, characterised in that it comprises means (1,4,5;20;1,4,39,28), housed in a control panel (2) of the dishwasher and operatively connected to said valve device (15) by mechanical transmission means (6,14,53,36), for selecting the working condition of said valve device (15).
- Device according to claim 1, characterised in that said mechanical transmission means (6,14,53,36) comprise a wire (6).
- Device according to claim 2, characterised in that said wire (6) is slidingly inserted in a covering sheath (14).
- Device according to claim 2 or 3, said valve device (15) comprising a movable element (16) for intercepting the flow of liquid, characterised in that said wire (6) is operatively connected to said intercepting element (16), so that the movement of said selector means (1,4,5;20;1,4,39,28) causes, by traction or release of the wire (6), movement of said intercepting element (16).
- Device according to claim 4, characterised in that said intercepting element (16) is integral with a pin (17), whereto the wire (6) is attached in an eccentric position, so that traction of the latter causes rotation of the pin (17) and hence movement of the intercepting element (16).
- Device according to claim 5, characterised in that said selector means (1,4,5;20;1,4,39,28) comprise a knob (1) rotatably housed in said panel (2) and integral with a lever (5) whereto said wire (6) is hooked.
- Device according to claim 6, characterised in that it comprises means (8,9) suitable for facilitating positioning of the knob (1) in three separate angular positions, a first angular position determining movement of the intercepting element (16) into a position of closure of one of the feed pipes (30,44,31,45) of the two rotors (46,47), a second angular position causing movement of the intercepting element into a position of closure of another of the feed pipes (30,44,31,45) of the two rotors (46,47) and a third angular position determining opening of both feed pipes (30,44,31,45) of the two rotors (46,47).
- Device according to claim 5, characterised in that said means of selection (1,4,5;20;1,4,39,28) comprise a cursor (20) slidingly housed in said panel (2) and whereto said wire (6) is hooked.
- Device according to claim 8, characterised in that it comprises means (23,24) for facilitating positioning of said cursor (20) in three separate positions, a first position determining the movement of the intercepting element (16) into a position of closure of one of the feed pipes (30,44,31,45) of the two rotors (46,47), a second position determining the movement of the intercepting element into a position of closure of another of the feed pipes (30,44,31,45) of the two rotors (46,47) and a third position determining opening of both feed pipes (30,44,31,45) of the two rotors (46,47).
- Device according to claim 5, characterised in that said means of selection (1,4,5;20;1,4,39,28) comprise: a knob (1) rotatingly housed in said panel (2) and integral with a shaft (4) of an electric motor (38); cam means (39) integral with said shaft (4); a lever (28) with fulcrum in said panel (2) and whereto said wire (6) is hooked, said lever being provided with a cog (70) which co-operates with said cam means (39).
- Device according to claim 10, characterised in that said cam means (39) comprise a disk (39) having a plurality of segments (71-73) of different radius, which determine respective angles of rotation of said lever (28) around said fulcrum (29).
- Device according to claim 11, characterised in that said plurality of segments comprises three segments (71,72,73), a first segment (71) determining a first angle of rotation of said lever (28) which in turn determines movement of the intercepting element (16) into a position of closure of one of the feed pipes (30,44,31,45) of the two rotors (46,47), a second segment (72) determining a second angle of rotation of said lever (28) which in turn determines movement of the intercepting element (16) into a position of closure of another of the feed pipes (30,44,31,45) of the two rotors (46,47) and a third segment (73) determining a third angle of rotation of the lever (28) which in turn determines movement of said intercepting element (16) into a position of opening of both feed pipes (30,44,31,45) of the two rotors (46,47).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI942027 | 1994-10-05 | ||
ITMI942027A IT1271243B (en) | 1994-10-05 | 1994-10-05 | COMMAND DEVICE FOR A VALVE FOR WASHING FLOW FLOW CONTROL, TO SELECTIVELY SUPPLY THE SPRAYING IMPELLERS OF A DISHWASHER MACHINE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0705561A1 EP0705561A1 (en) | 1996-04-10 |
EP0705561B1 true EP0705561B1 (en) | 1998-08-19 |
Family
ID=11369651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95202604A Expired - Lifetime EP0705561B1 (en) | 1994-10-05 | 1995-09-27 | Flow regulating device for the selective feeding of a dishwasher spraying-arms |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0705561B1 (en) |
DE (1) | DE69504164T2 (en) |
IT (1) | IT1271243B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005044393B4 (en) * | 2004-09-16 | 2009-04-02 | Lg Electronics Inc. | Dishwasher and control method for a dishwasher |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19812231A1 (en) * | 1998-03-20 | 1999-09-23 | Aeg Hausgeraete Gmbh | dishwasher |
EP1128759B8 (en) * | 1998-10-16 | 2004-12-15 | Arcelik A.S. | Dishwashing machine with independently controlled washing racks |
IT1311444B1 (en) | 1999-11-16 | 2002-03-12 | Eltek Spa | INTERCEPTION DEVICE OF THE FLOW OF A FLUID, IN PARTICULAR FOR HOUSEHOLD WASHING MACHINES. |
DE102005043923B4 (en) * | 2004-09-14 | 2009-10-29 | Lg Electronics Inc. | Dishwasher for household applications, has inlet-flow channel and main-flow channels formed in sump for introducing and moving washing water, and flow channel-control valve arranged between inlet-flow channel and main-flow channels |
KR100662353B1 (en) | 2004-09-14 | 2007-01-02 | 엘지전자 주식회사 | Dishwasher |
DE102007041299A1 (en) * | 2007-08-31 | 2009-03-05 | BSH Bosch und Siemens Hausgeräte GmbH | Method for operating a dishwasher |
ITPR20130023A1 (en) * | 2013-03-29 | 2014-09-30 | Indesit Co Spa | DISHWASHER. |
EP3636972A1 (en) * | 2018-10-10 | 2020-04-15 | Whirlpool Corporation | Multi-way diverter valve for a dishwasher |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7821866U1 (en) * | 1978-07-21 | 1978-11-02 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | DISHWASHER |
FR2443231A2 (en) * | 1978-12-08 | 1980-07-04 | Esswein Sa | Water circulation system for dish washer - incorporates flat pivoting valve operated by rotary cam and alternately blocking one of two tubes |
FR2494804A1 (en) * | 1980-11-27 | 1982-05-28 | Esswein Sa | DEVICE FOR DISPENSING WATER AND DISHWASHER EQUIPPED WITH SUCH A DEVICE |
IT1135789B (en) * | 1981-05-14 | 1986-08-27 | Candy Ind Spa | IMPROVEMENT IN DISHWASHER MACHINES |
DE3209542C1 (en) * | 1982-03-16 | 1992-05-07 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Dishwashing machine |
IT1156020B (en) * | 1982-05-26 | 1987-01-28 | Indesit | DEVICE FOR THE ALTERNATE POWER SUPPLY OF THE ROTATING COLLECTORS OF A DISHWASHER MACHINE |
IT1191526B (en) * | 1986-03-19 | 1988-03-23 | Zanussi Elettrodomestici | WASHING MACHINE WITH FLUID DISTRIBUTION VALVE OF A LIQUID |
-
1994
- 1994-10-05 IT ITMI942027A patent/IT1271243B/en active IP Right Grant
-
1995
- 1995-09-27 DE DE69504164T patent/DE69504164T2/en not_active Expired - Fee Related
- 1995-09-27 EP EP95202604A patent/EP0705561B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005044393B4 (en) * | 2004-09-16 | 2009-04-02 | Lg Electronics Inc. | Dishwasher and control method for a dishwasher |
Also Published As
Publication number | Publication date |
---|---|
DE69504164T2 (en) | 1999-01-21 |
DE69504164D1 (en) | 1998-09-24 |
EP0705561A1 (en) | 1996-04-10 |
IT1271243B (en) | 1997-05-27 |
ITMI942027A1 (en) | 1996-04-05 |
ITMI942027A0 (en) | 1994-10-05 |
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