Dishwasher comprising a sensor unit for determinig a rotation movement of a spray arm

Abstract

The invention proposes a dishwasher comprising a working chamber ( 2 ), comprising at least one spray arm ( 5, 6 ) which is arranged in a rotatable manner in the working chamber ( 2 ), and comprising a metering apparatus ( 9 ) for supplying and metering a substance, such as detergent, rinse aid etc., into the working chamber ( 2 ), wherein the metering apparatus ( 9 ) is designed as an insert part ( 9 ) comprising a housing ( 20, 21 ) for insertion into a recess in an inner wall ( 7 ) of the working chamber ( 2 ), for example in the door ( 7 ) of the warning chamber ( 2 ), and comprising a sensor unit ( 27, 28 ) for identifying a spray arm movement in the working chamber ( 2 ) of the dishwasher, which sensor unit is arranged at least partially in a housing ( 20, 21 ) of the metering apparatus ( 6 ), wherein the dishwasher has improved program control. According to the invention, this is achieved in that at least one inlet opening ( 17 ) in an interior ( 22 ) of the metering apparatus ( 9 ) is arranged at least partially in the jet ( 23 ) of water/liquid from a spray nozzle ( 24 ) of the spray arm ( 5, 6 ) during the rotation of the spray arm ( 5, 6 ), wherein the sensor unit ( 27, 28 ) is arranged at least partially in the/on the interior ( 22 ) and/or on a wall of the interior ( 22 ).

1 . A dishwasher comprising a working chamber ( 2 ), comprising at least one spray arm ( 5 ,  6 ) which is arranged in a rotatable manner in the working chamber ( 2 ), and comprising a metering apparatus ( 9 ) for supplying and metering a substance, such as detergent, rinse aid etc., into the working chamber ( 2 ), wherein the metering apparatus ( 9 ) is designed as an insert part ( 9 ) comprising a housing ( 20 ,  21 ) for insertion into a recess in an inner wall ( 7 ) of the working chamber ( 2 ), for example in the door ( 7 ) of the working chamber ( 2 ), and comprising a sensor unit ( 27 ,  28 ) for identifying a spray arm movement in the working chamber ( 2 ) of the dishwasher, which sensor unit is arranged at least partially in a housing ( 20 ,  21 ) of the metering apparatus ( 6 ), characterized in that at least one inlet opening ( 17 ) in an interior ( 22 ) of the metering apparatus ( 9 ) is arranged at least partially in the jet ( 23 ) of water/liquid from a spray nozzle ( 24 ) of the spray arm ( 5 ,  6 ) during the rotation of the spray arm ( 5 ,  6 ), wherein the sensor unit ( 27 ,  28 ) is arranged at least partially in the/on the interior ( 22 ) and/or on a wall of the interior ( 22 ). 
     
     
         2 . The dishwasher according to  claim 1 , characterized in that the interior ( 22 ) has at least one drain opening ( 15 ) for draining/outflow of the water/liquid. 
     
     
         3 . The dishwasher according to  claim 2  characterized in that the drain opening ( 15 ) and/or the interior ( 22 ) have/has at least one restrictor apparatus ( 26 ) for building up and/or restricting the water/liquid in the interior ( 22 ). 
     
     
         4 . The dishwasher according to  claim 1  wherein the sensor unit ( 27 ,  28 ) comprises at least one conductance sensor for detecting a conductance of the water/liquid. 
     
     
         5 . The dishwasher according to  claim 1  wherein the sensor unit ( 27 ,  28 ) comprises at least one pressure sensor for detecting a water/liquid pressure. 
     
     
         6 . The dishwasher according to  claim 1  wherein the sensor unit ( 27 ,  28 ) comprises at least one optical sensor apparatus for detecting the water/liquid. 
     
     
         7 . The dishwasher according to  claim 1  wherein the housing ( 20 ,  21 ) of the metering apparatus ( 9 ) has guide elements ( 16 ) in order to keep the interior ( 22 ) and/or the sensor unit ( 27 ,  28 ) at least partially free of water running off from the housing ( 20 ,  21 ). 
     
     
         8 . The dishwasher according to  claim 7  wherein the guide elements ( 16 ) are designed as a roof ( 16 ) over the inlet opening ( 177 ) through which the jet of water/liquid passes and/or over the interior ( 22 ). 
     
     
         9 . The dishwasher according to  claim 1  wherein the sensor unit ( 27 ,  28 ) is arranged such that it is not situated directly in a jet of water/liquid from a spray arm nozzle ( 24 ,  30 ). 
     
     
         10 . The dishwasher according to  claim 1  further comprising a time sequence of the sensor signal is detected and an evaluation unit is provided in order to detect the periodicity and/or frequency of the sensor signal which is induced by the rotating splay arm ( 5 ,  6 ). 
     
     
         11 . The dishwasher according to  claim 1  further comprising an analog evaluation circuit. 
     
     
         12 . A metering apparatus ( 9 ) for supplying and metering a substance, such as detergent, rinse aid etc., into a working chamber ( 2 ) of a dishwasher according to one of the preceding claims, which metering apparatus is designed as an insert part ( 9 ) comprising a housing ( 20 ,  21 ) for insertion into a recess in an inner wall ( 7 ) of the working chamber ( 2 ), for example in the door ( 7 ) of the working chamber ( 2 ), and comprises a sensor unit ( 27 ,  28 ) for identifying a spray arm movement in the working chamber ( 2 ) of the dishwasher, which sensor unit is arranged at least partially in the housing ( 20 ,  21 ), characterized in that at least one inlet opening ( 17 ) in an interior ( 22 ) of the metering apparatus ( 9 ) is arranged at least partially in the jet ( 23 ) of water/liquid from a spray nozzle ( 24 ) of the spray arm ( 5 ,  6 ) during the rotation of the spray arm ( 5 ,  6 ), wherein the sensor unit ( 9 ) is arranged at least partially in the/on the interior ( 22 ) and/or on a wall of the interior ( 22 ).