Patent ID: 7708837
Filing Date: 2010-05-04
Classification: A47L

Abstract:
1. A control method for a dishwasher ( 1 ) having a washing tub ( 2 ) where appliances are put, a sump ( 3 ) under the washing tub ( 2 ) where water in the washing tub ( 2 ) is collected during the washing process, a biosensor ( 7 ) which detects the microorganisms in the washing water, a memory ( 10 ) to which parameters to be compared are loaded, including acceptable maximum microbiologic pollution rates (MBN 0 , MBN 1 , MBN 2 , MBN 3 ) preloaded by the producer, a microprocessor ( 9 ) which compares signals produced by a biosensor ( 7 ) including a microbiologic pollution rate (MBN) measured by the biosensor in a washing cycles is compared with the parameters loaded to the memory ( 10 ) and forwards the result of the comparison and a control unit ( 11 ) which arranges the washing program with respect to the data obtained from the microprocessor ( 9 ) comprising the steps below: A user starts a washing cycle ( The user selects either a pre-washing or a without pre-washing program ( If the without pre-washing program is selected, main washing cycle is started ( If the pre-washing program is selected, then the pre-washing program is started ( The Microbiologic pollution rate (MBN) is measured by the biosensor ( The MBN is compared with a limit value of the acceptable microbiologic pollution rate (MBN If MBN<MBN If MBN>MBN The Main washing cycle is started ( The Microbiologic pollution rate (MBN) is measured by the biosensor ( The MBN is compared with the limit value of a acceptable microbiologic pollution rate (MBN If MBN<MBN If MBN>MBN The Rinsing cycle is started following the main washing ( The Microbiologic pollution rate (MBN) is measured by the biosensor ( It is checked whether the microbiologic pollution has reached the accepted microbiologic pollution rate at the negligible level (MBN If MBN=MBN If the microbiologic pollution is detected (MBN>MBN If MBN>MBN If MBN<MBN Microbiologic pollution rate (MBN) is measured by the biosensor ( It is checked whether the microbiologic pollution has reached the accepted microbiologic pollution rate at the negligible level (MBN If MBN=MBN If MBN>MBN Microbiologic pollution rate (MBN) is measured by the biosensor ( It is checked whether the microbiologic pollution has reached the accepted microbiologic pollution rate at the negligible level (MBN If MBN=MBN If MBN>MBN Microbiologic pollution rate (MBN) is measured by the biosensor ( It is checked whether the microbiologic pollution has reached the accepted microbiologic pollution rate at the negligible level (MBN If MBN>MBN If MBN>MBN Sterilized water is used for rinsing during TS A rinsing water is discharged ( A drying cycle is started ( The drying cycle is ended (