Global Patent Index - EP 3756527 A1

EP 3756527 A1 20201230 - SYSTEM FOR CONTROLLING THE DEGREE OF HARDNESS OF THE WASHING WATER IN A WASHING MACHINE, IN PARTICULAR A DISHWASHER, AND METHOD THEREOF

Title (en)

SYSTEM FOR CONTROLLING THE DEGREE OF HARDNESS OF THE WASHING WATER IN A WASHING MACHINE, IN PARTICULAR A DISHWASHER, AND METHOD THEREOF

Title (de)

SYSTEM ZUR STEUERUNG DES HÄRTEGRADES DES WASCHWASSERS IN EINER WASCHMASCHINE, INSBESONDERE EINER GESCHIRRSPÜLMASCHINE, UND VERFAHREN DAZU

Title (fr)

SYSTEME DE CONTROLE DU DEGRE DE DURETE DE L'EAU DE LAVAGE DANS UNE MACHINE A LAVER, NOTAMMENT UN LAVE-VAISSELLE, ET SON PROCEDE

Publication

EP 3756527 A1 20201230 (EN)

Application

EP 20181149 A 20200619

Priority

IT 201900010461 A 20190628

Abstract (en)

The present invention relates to a system (1), and a corresponding method, for controlling the degree of hardness of the washing water in a washing machine, in particular a dishwasher, said system (1) comprising:- a first tank (10) for containing a substance having decalcifying properties, in particular said first tank (10) being equipped with a first inlet (11) for letting water to be decalcified flow into the first tank (10) and a first outlet (12) for letting decalcified water flow out of the first tank (10), to be then supplied into a tub (V) of a washing machine;- a second tank (20) for containing a regeneration substance, in particular said second tank (20) being equipped with a second inlet (21) for letting water flow into the second tank (20) and a second outlet (22) for letting a regeneration brine, formed upon dissolution of the regeneration substance into the water, flow out of the second tank (20);- a connection duct (30) that connects the second tank (20) with the first tank (10) for letting the brine formed in the second tank (20) flow towards said first tank (10);- a supply duct (2) with which a supply valve (3) is associated, which is controlled by a control unit of the washing machine, said supply duct (2) having a first bifurcation (40) into a first branch (41), for supplying the first tank (10), and a second branch (42).The peculiar feature of the present invention lies in the fact that said second branch (42) comprises a valve (50) located at a second bifurcation (60) into a third branch (43) ending into the tub (V) and a fourth branch (44) ending into the second tank (20), said valve (50) being controlled by said control unit of the washing machine in such a way as to selectively be:- in a first operating configuration, wherein said valve (50) closes the second branch (42) by interrupting the connection of said second branch (42) with the third branch (43) and with the fourth branch (44), so as to cause the water coming from the supply duct (2) to flow into the first branch (41), into the first tank (10), where the water is decalcified, and then into the tub (V);- in a second operating configuration, wherein said valve (50) connects the second branch (42) with the third branch (43) to allow the water coming from the supply duct (2) to flow into the tub (V) through said third branch (43);- in a third operating configuration, wherein said valve (42) connects the second branch (42) with the fourth branch (44) to allow the water coming from the supply duct (2) to flow into the second tank (20) through said fourth branch (44).

IPC 8 full level

A47L 15/42 (2006.01); D06F 39/00 (2020.01)

CPC (source: EP)

A47L 15/4229 (2013.01); D06F 39/007 (2013.01); A47L 2401/03 (2013.01); A47L 2501/18 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3756527 A1 20201230; EP 3756527 B1 20230809; IT 201900010461 A1 20201228; PL 3756527 T3 20240212

DOCDB simple family (application)

EP 20181149 A 20200619; IT 201900010461 A 20190628; PL 20181149 T 20200619