Liquid pump

Abstract

A liquid pump is proposed, in particular for household machines, such as dishwashers, washing machines or the like, with a pump casing ( 1 ), with a pump casing ( 1 ) incorporating a pump chamber ( 2 ), in which an impeller ( 3 ) is rotatably mounted, and with a drive motor ( 4 ) comprising a rotor ( 5 ) and a stator ( 6 ), wherein the stator ( 6 ) is separated from the rotor ( 5 ) in a liquid-tight manner by the wall ( 7 ) of a rotor chamber ( 8 ), which avoids or at least diminishes the aforementioned disadvantages while retaining the advantages of a wet runner. This is achieved according to the invention by providing a thermally conductive separating wall ( 9 ) between the pump chamber ( 2 ) and the rotor chamber ( 8 ).

1 . A liquid pump, in particular for household machines, such as dishwashers, washers or the like, with a pump casing ( 1 ) incorporating a pump chamber ( 2 ), in which an impeller ( 3 ) is rotatably mounted, and with a drive motor ( 4 ) comprising a rotor ( 5 ) and a stator ( 6 ), wherein the stator ( 6 ) is separated from the rotor ( 5 ) in a liquid-tight manner by the wall ( 7 ) of a rotor chamber ( 8 ), characterized in that a thermally conductive separating wall ( 9 ) is provided between the pumping chamber ( 2 ) and the rotor chamber ( 8 ).  
   
   
       2 . The pump according to  claim 1 , characterized in that the separating wall ( 9 ) is liquid-tight.  
   
   
       3 . The pump according to one of the previous claims, characterized in that the separating wall ( 9 ) has a surface-enlarging structure.  
   
   
       4 . The pump according to one of the previous claims, characterized in that the cross section of the rotor chamber ( 8 ) has a cross sectional expansion to enlarge the surface of the separating wall ( 9 ) to the pump chamber ( 2 ).  
   
   
       5 . The pump according to one of the previous claims, characterized in that a liquid passage ( 16 ) is provided between the pump chamber ( 2 ) and the rotor chamber ( 8 ).  
   
   
       6 . The pump according to one of the previous claims, characterized in that a valve ( 12 ) is present for the rotor chamber ( 8 ) so that the rotor chamber ( 8 ) can be filled.  
   
   
       7 . The pump according to one of the previous claims, characterized in that the valve ( 12 ) is provided for opening and closing the passage between the pump chamber ( 2 ) and the rotor chamber ( 8 ).  
   
   
       8 . The pump according to one of the previous claims, characterized in that a vent valve ( 12 ) is provided for the rotor chamber.  
   
   
       9 . The pump according to one of the previous claims, characterized in that the valve ( 12 ) is designed as a float valve ( 12 ).  
   
   
       10 . The pump according to one of the previous claims, characterized in that there is a controlled filling of the rotor chamber ( 8 ) with liquid.  
   
   
       11 . The pump according to one of the previous claims, characterized in that a control unit is provided for filling the rotor chamber ( 8 ) as a function of the presence of air in the rotor chamber ( 8 ).  
   
   
       12 . The pump according to one of the previous claims, characterized in that a control unit is provided for the temperature-dependent filling of the rotor chamber ( 8 ) with liquid.  
   
   
       13 . The pump according to one of the previous claims, characterized in that a control unit is provided for filling the rotor chamber ( 8 ) as a function of the rotational direction of the drive motor ( 4 ).  
   
   
       14 . A household machine, such as a dishwasher, washer or the like, characterized in that a pump according to one of the preceding claims is provided.