WO2014155333A1 - Lave-vaisselle - Google Patents

Lave-vaisselle Download PDF

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Publication number
WO2014155333A1
WO2014155333A1 PCT/IB2014/060215 IB2014060215W WO2014155333A1 WO 2014155333 A1 WO2014155333 A1 WO 2014155333A1 IB 2014060215 W IB2014060215 W IB 2014060215W WO 2014155333 A1 WO2014155333 A1 WO 2014155333A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch
mobile part
geometric
cam profile
references
Prior art date
Application number
PCT/IB2014/060215
Other languages
English (en)
Inventor
Nicola LADISA
Fabio Ughetto
Giacomo Marvardi
Gianluca Viola
Original Assignee
Indesit Company S.P.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Indesit Company S.P.A. filed Critical Indesit Company S.P.A.
Priority to EP14722739.1A priority Critical patent/EP2978361B1/fr
Publication of WO2014155333A1 publication Critical patent/WO2014155333A1/fr

Links

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
    • 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
    • A47L15/46—Devices for the automatic control of the different phases of cleaning ; Controlling devices

Definitions

  • the present invention relates to a dishwasher.
  • Dishwashers are known comprising:
  • a washing compartment suitable to contain the dishes to be washed; ii) first spraying means of the dishes;
  • a rotating element which can be set in rotation by the motor and comprising a plurality of outlet holes of the liquid; according to the degree of rotation of the rotating element the holes can be facing one or more holes that supply corresponding spraying means (in this way it is possible to decide whether to supply only the first spraying means, only the second spraying means or both the spraying means);
  • cam profile comprises a plurality of grooves into which the mobile part of the switch is inserted determining the opening thereof; when the mobile element of the switch is in the stretch between two consecutive grooves the switch remains closed; according to which and how many spraying means are chosen to be supplied the switch can be found in a corresponding groove.
  • a drawback of this embodiment is connected with the complexity of identifying a reference angle zero on the cam profile.
  • the technical task underpinning the present invention is to optimise the components of the dishwasher making the steps of unloading and loading the washing liquid from/into the dishwasher particularly quick.
  • the object of the present invention is to provide a dishwasher that allows quicker identification of an angle zero of a cam profile being part of washing liquid directing means.
  • FIG. 1 shows a schematic view of a dishwasher according to the present invention
  • FIG. 2 shows a wiring diagram of a device according to the present invention
  • FIG. 2a shows a modified wiring diagram of a device according to the present invention
  • FIG. 3 shows a component of a dishwasher according to the present invention.
  • the subject matter of the present invention is a dishwasher 1 comprising a washing compartment 2 suitable to contain the dishes to be washed.
  • the dishwasher 1 comprises one or more dish support racks.
  • Such racks at least in an operating configuration of the dishwasher 1 , are inside the washing compartment 2.
  • such racks may comprise an upper rack 42 and a lower rack 32.
  • the dishwasher 1 comprises first spraying means 3 for spraying the dishes, for example a rotating sprayer.
  • first spraying means 3 could be positioned below the lower rack 32.
  • the first spraying means 3 are positioned in the washing compartment 2.
  • the dishwasher 1 further comprises second spraying means 4 for spraying the dishes, for example a rotating sprayer.
  • second spraying means 4 could be positioned between the lower rack 32 and the upper rack 42.
  • the second spraying means 4 are positioned in the washing compartment 2.
  • third spraying means 43 may be present comprising for example a shower positioned higher than the upper rack 42.
  • the dishwasher 1 comprises directing means 5 for directing a washing liquid at least towards the first or the second spraying means 3, 4.
  • the directing means 5 could also direct the washing liquid towards the third spraying means 43 (if present).
  • the directing means 7 can:
  • the directing means 5 comprise:
  • -an electric motor 50 typically an electric motor powered with alternating current; for example a synchronous motor;
  • washing liquid outlet holes are eccentric with respect to the axis of rotation of the rotating element 51 (this could also be repeated in the event of there being only one outlet hole, but this embodiment is not preferable).
  • the directing means 5 also comprise a cam profile 53 and a switch 54 having a mobile part adapted to determine the opening/closing state of said switch 54.
  • the mobile part of the switch 54 is in contact with the cam profile 53 at least when the switch 54 is closed.
  • the liquid outlet hole is supplied by a pump 44 which takes the washing liquid from the bottom of the washing compartment 2.
  • a rotation of the rotating element 51 determines a relative shift of said cam profile 53 with respect to said switch 54 to determine the opening/closing of the switch 54.
  • the cam profile 53 comprises a plurality of geometric references 6.
  • the positioning of said mobile part of the switch 54 at the geometric references 6 determines the opening of the switch 54.
  • the positioning of said mobile part of the switch 54 between two consecutive geometric references 6 is associated with a closing state of the switch 54.
  • Such geometric references 6 comprise at least a first and a second geometric reference 61 , 62.
  • the first and the second geometric reference 61 , 62 are consecutive to one another and between them the switch 54 remains closed.
  • the geometric references 6 constitute discontinuities of the profile 53.
  • cam profile 53 extends along a closed line onto itself.
  • the profile 53 is asymmetrical (in particular the closed line along which the profile 53 extends is asymmetrical).
  • the plurality of geometric references 6 comprises/coincides with a plurality of concavities 63 distributed along the profile 53.
  • Such concavities 63 define grooves in which the mobile part of the switch 54 is intended to be inserted determining the opening of the switch 54 itself. In fact, when the grooves and the mobile part of the switch 54 overlap, the mobile part penetrates into said grooves determining the opening of the switch 54 (usually following the thrust of elastic means).
  • the cam profile 53 comprises "n” geometric references 6 ("n” being a natural number greater than or equal to 2); in particular “n-1 " geometric references 6 are identical to one another. The remaining geometric reference 6 has different dimensions from the above-indicated “n-1 " geometric references 6.
  • cam profile 53 rotates along with said rotating element 51 .
  • the switch 54 is constrained to a fixed point.
  • the cam profile 53 is usually afforded on a separate disc from said rotating element 51 .
  • the cam profile 53 comprises a plurality of teeth between which said geometric references 6 are interposed (which are hence concavities 63).
  • An alternative situation may arise, however, wherein the geometric references 6 are projections.
  • the cam profile 53 comprises a series of more external stretches 65 which are staggered by said geometric references 6 (concavities 63). Said series of more external stretches 65 is defined by a set of circumference arches (appropriately such arches all lie on the same imaginary circumference).
  • the directing means 5 comprise activation means 7 of the rotation of the motor 50.
  • the activation means 7 of the rotation of the motor 50 are controlled by an electric signal.
  • an electric signal is pulse based.
  • such electric signal is continuous. As will be better explained below, this is very advantageous.
  • the activation means 7 for the rotation of the motor 50 comprise/coincide with a TRIAC 70. On this point, the pulse based or continuous electric signal is applied to the TRIAC 70 through the gate 71 of the TRIAC 70. More generally, the TRIAC 70 enables the motor 50 to be driven.
  • the dishwasher 1 comprises a first conduit 30 that extends between the first spraying means 3 and said rotating element 51 .
  • said outlet hole is in communication with an inlet hole in the first conduit 30.
  • the outlet hole faces the inlet hole.
  • the mobile part of the switch 54 is at said first geometric reference 61 (and advantageously it penetrates into the first geometric reference 61 ).
  • the dishwasher 1 comprises a second conduit 40 that extends between the second spraying means 4 and said rotating element 51 .
  • said outlet hole is in communication with an inlet hole in the second conduit 40; in said second configuration the mobile part of the switch 54 is at said second geometric reference 62 (and advantageously it penetrates into the second geometric reference 62).
  • the rotating element 51 comprises a plurality of outlet holes (for example comprised between 4 and 6). According to the degree of rotation of the rotating element 51 one or more of such holes can overlap with the conduits that supply the first or the second or the third spraying means 3, 4, 43 (according to the degree of rotation of the element 51 it can then be decided which spraying means to supply).
  • the directing means 5 comprise an electric path 8 for electrically powering the motor 50.
  • the path 8 comprises a first branch 81 along which said activation means 7 are arranged (the TRIAC 70).
  • the path 8 further comprises a second branch 82 that by-passes the first branch 81 and along which the switch 54 is arranged. With the switch 54 closed, the second branch 82 short circuits the TRIAC 70 and the motor 50 is powered hence the rotation of the rotating element 51 and the cam profile 53.
  • a shunt resistor 93 which preferably has a value comprised between 10 and 300 ohm).
  • the directing means 5 comprise a splitter (indicated by reference number 90 in the figures).
  • the splitter 90 comprises a first resistor 91 and a second resistor 92.
  • the first resistor 91 has a value of approximately 39 kOhm while the second resistor 92 has a value of approximately 10 kOhm.
  • the embodiment of Figure 2a envisages the use of at least one zener diode 820 along the second branch 82.
  • the second branch 82 comprises two zener diodes 820 connected in series with a common anode.
  • the two zener diodes may be the same and such as to have a rated voltage of 5.1 V.
  • the first resistor 91 is replaced by a plurality of resistors 94, 95, 96, a diode 97 being interposed between two of them.
  • the directing means 5 (but more generally the dishwasher 1 ) comprise retroactive means 9 identifying the opening or closing state of the switch 54.
  • the retroactive means 9 are therefore important for identifying time intervals in which the switch 54 is closed and time intervals in which the switch 54 is open.
  • the directing means 5 (but more generally the dishwasher 1 ) comprise control means that identify the passage of said mobile part of the switch 54 at a predetermined zone of the profile 53 according to the opening or closing duration of at least one of the intervals in which the switch is open or closed.
  • control means are operatively associated with said retroactive means 9.
  • the control means of the dishwasher 1 comprise means for comparing the duration of each interval in which the switch 54 is closed and a predetermined time interval that is compatible with the shift of the mobile part of the switch 54 along a path connecting said predetermined concavity X and a concavity consecutive to it.
  • the control means of the dishwasher 1 comprise means for comparing the duration of each interval in which the switch 54 is open and a predetermined time interval that is compatible with the shift of the mobile part of the switch 54 along said predetermined concavity X.
  • the feedback signal of the retroactive means 9 is "deaf" when the TRIAC 70 is driven. Consequently, as previously mentioned, the driving of the TRIAC 70 is pulse based so as to perform the readings of the feedback coming from the retroactive means 9 at the moments in which the driving is OFF.
  • a zener diode 820 (in particular two connected in series with a common anode) is important since it introduces a decoupling between the first branch 81 and the second branch 82, making it possible to discriminate whether the switch 54 is open or closed even when the TRIAC 70 is closed; in this way the TRIAC 70 can be supplied continuously and at the same time the opening or closing state of the switch 54 can be identified through the retroactive means 9.
  • the retroactive means 9 and the comparison means comprise/are at least partially integrated in an electronic control unit.
  • the subject matter of the present invention is further an identification method of an angle zero of the cam profile 53 of a dishwasher 1 having one or more of the characteristics previously described.
  • the method comprises the steps of:
  • the invention as it is conceived enables multiple advantages to be attained.
  • the dishwasher 1 is able to determine such angle zero with a simple turn of the rotating element 51 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)

Abstract

L'invention concerne un lave-vaisselle comprenant des moyens d'acheminement (5) acheminant un liquide de lavage au moins vers le premier ou le deuxième moyen de pulvérisation (3, 4) ; lesdits moyens d'acheminement (5) comprenant : - un moteur électrique (50), un profilé formant came (53) et un commutateur (54) comportant une partie mobile destinée à venir en contact avec le profilé formant came (53) ; - un élément rotatif (51) comprenant au moins un trou d'alimentation en liquide de lavage ; ledit ou lesdits trous pouvant être placés en communication avec le premier ou le deuxième moyen de pulvérisation (3, 4) ; une rotation dudit élément rotatif (51) déterminant un mouvement relatif dudit profilé formant came (53) et dudit commutateur (54) afin de déterminer l'ouverture/la fermeture du commutateur (54) ; ledit profilé formant came (53) comprenant une pluralité de cavités (63) au niveau desquelles s'ouvre le commutateur (54) ; - des moyens d'activation (7) de rotation du moteur (50) ; les moyens d'activation (7) de rotation du moteur (50) étant commandés par un signal électrique à impulsions ; - un circuit électrique (8) alimentant le moteur (50) ; ledit circuit électrique (8) comprenant une première branche (81) le long de laquelle sont disposés lesdits moyens d'activation (7) et une deuxième branche (82) qui contourne la première branche (81) et le long de laquelle est disposé le commutateur (54) ; - des moyens de commande (9) qui surveillent la durée des divers intervalles durant lesquels le commutateur (54) est fermé ou ouvert.
PCT/IB2014/060215 2013-03-29 2014-03-27 Lave-vaisselle WO2014155333A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14722739.1A EP2978361B1 (fr) 2013-03-29 2014-03-27 Lave-vaisselle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPR2013A000023 2013-03-29
IT000023A ITPR20130023A1 (it) 2013-03-29 2013-03-29 Lavastoviglie.

Publications (1)

Publication Number Publication Date
WO2014155333A1 true WO2014155333A1 (fr) 2014-10-02

Family

ID=48366438

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/060215 WO2014155333A1 (fr) 2013-03-29 2014-03-27 Lave-vaisselle

Country Status (3)

Country Link
EP (1) EP2978361B1 (fr)
IT (1) ITPR20130023A1 (fr)
WO (1) WO2014155333A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3040012A1 (fr) 2014-12-31 2016-07-06 Indesit Company S.p.A. Lave-vaisselle domestique
EP3040011A1 (fr) 2014-12-31 2016-07-06 Indesit Company S.p.A. Lave-vaisselle domestique
EP3040010A1 (fr) 2014-12-31 2016-07-06 Indesit Company S.p.A. Lave-vaisselle domestique
EP3236831B1 (fr) 2014-12-24 2020-11-04 Illinois Tool Works Inc. Dispositif de lavage/rinçage ajustable, lave-vaisselle statique équipé de celui-ci et procédé associé

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889878A (en) * 1973-02-16 1975-06-17 Allen West And Company Limited Multi-way valve and position controller therefor
EP0585905A2 (fr) * 1992-09-04 1994-03-09 Daewoo Electronics Co., Ltd Machine à laver la vaisselle
EP0705561A1 (fr) * 1994-10-05 1996-04-10 CANDY S.p.A. Dispositif de régulation de débit pour l'alimentation sélective des bras d'aspersion d'une machine à laver la vaisselle
DE10065571A1 (de) * 2000-12-28 2002-07-04 Bsh Bosch Siemens Hausgeraete Geschirrspülmaschine
US20040103926A1 (en) * 2002-11-28 2004-06-03 Lg Electronics Inc. Dishwasher
US20120060876A1 (en) * 2010-11-23 2012-03-15 Ronald Scott Tarr Valve assembly for use with a washing appliance

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889878A (en) * 1973-02-16 1975-06-17 Allen West And Company Limited Multi-way valve and position controller therefor
EP0585905A2 (fr) * 1992-09-04 1994-03-09 Daewoo Electronics Co., Ltd Machine à laver la vaisselle
EP0705561A1 (fr) * 1994-10-05 1996-04-10 CANDY S.p.A. Dispositif de régulation de débit pour l'alimentation sélective des bras d'aspersion d'une machine à laver la vaisselle
DE10065571A1 (de) * 2000-12-28 2002-07-04 Bsh Bosch Siemens Hausgeraete Geschirrspülmaschine
US20040103926A1 (en) * 2002-11-28 2004-06-03 Lg Electronics Inc. Dishwasher
US20120060876A1 (en) * 2010-11-23 2012-03-15 Ronald Scott Tarr Valve assembly for use with a washing appliance

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3236831B1 (fr) 2014-12-24 2020-11-04 Illinois Tool Works Inc. Dispositif de lavage/rinçage ajustable, lave-vaisselle statique équipé de celui-ci et procédé associé
EP3040012A1 (fr) 2014-12-31 2016-07-06 Indesit Company S.p.A. Lave-vaisselle domestique
EP3040011A1 (fr) 2014-12-31 2016-07-06 Indesit Company S.p.A. Lave-vaisselle domestique
EP3040010A1 (fr) 2014-12-31 2016-07-06 Indesit Company S.p.A. Lave-vaisselle domestique

Also Published As

Publication number Publication date
EP2978361A1 (fr) 2016-02-03
ITPR20130023A1 (it) 2014-09-30
EP2978361B1 (fr) 2017-09-13

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