Global Patent Index - EP 0985144 A1

EP 0985144 A1 2000-03-15 - METHOD FOR DETECTING AN UNACCEPTABLY HIGH DEGREE OF CALCIFICATION IN A WATER-CARRYING HOUSEHOLD APPLIANCE

Title (en)

METHOD FOR DETECTING AN UNACCEPTABLY HIGH DEGREE OF CALCIFICATION IN A WATER-CARRYING HOUSEHOLD APPLIANCE

Title (de)

VERFAHREN ZUM FESTSTELLEN EINES UNZULÄSSIG HOHEN VERKALKUNGSGRADES IN EINEM WASSERFÜHRENDEN HAUSHALTSGERÄT

Title (fr)

PROCEDE POUR DETECTER UN DEGRE D'ENTARTRAGE INACCEPTABLE DANS UN APPAREIL MENAGER VEHICULANT DE L'EAU

Publication

EP 0985144 A1 (DE)

Application

EP 98930702 A

Priority

  • DE 19721976 A
  • EP 9802924 W

Abstract (en)

[origin: DE19721976A1] The invention relates to a method for detecting an unacceptably high degree of scale in an optical measuring section for measuring the turbidity of a lye in a household appliance which operates using calcareous water, such as a washing machine or a dishwasher. The household appliance has a circuit for evaluating the measuring signals from the measuring section (1) and a microprocessor (5) for transferring the measuring results to the sequential control of the appliance. This method is suitable for indicating an unacceptable degree of scale and for taking into account a deterioration of the measuring section due to scaling when determining the turbidity of the lye. Before or during first use of the appliance, a threshold value for acceptable deterioration of the measuring section by future scaling is memorized. During each operating cycle of the appliance, the deterioration of the measuring section during a cycle section which is carried out without turbid lye is measured and converted into a measured value, which is then compared to the threshold value. The microprocessor emits a control signal to the sequential control when the measured value reaches, or nearly reaches, the threshold value.

IPC 1-7 (main, further and additional classification)

G01N 21/53; A47L 15/46; D06F 39/00

IPC 8 full level (invention and additional information)

A47L 15/42 (2006.01); D06F 39/00 (2006.01); G01N 21/53 (2006.01)

CPC (invention and additional information)

A47L 15/4297 (2013.01); D06F 39/004 (2013.01); G01N 21/534 (2013.01)

Citation (search report)

See references of WO 9854564A1

Designated contracting state (EPC)

AT CH DE ES FR GB IT LI

EPO simple patent family

DE 19721976 A1 19981203; DE 19721976 B4 20080724; BR 9809174 A 20000801; CN 1257579 A 20000621; EP 0985144 A1 20000315; KR 20010012922 A 20010226; PL 336936 A1 20000717; TR 9902770 T2 20000221; US 6035471 A 20000314; WO 9854564 A1 19981203

INPADOC legal status


2005-02-09 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040803

2004-05-06 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20040322

2004-01-28 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: BSH BOSCH UND SIEMENS HAUSGERAETE GMBH

2000-03-15 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991021

2000-03-15 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT CH DE ES FR GB IT LI