Electric coolant pump

Abstract

The invention relates to an electric coolant pump comprising a pump housing, a rotating conveying element for accelerating the coolant, a pump shaft passing through the pump housing and on which the conveying element is mounted, an electric motor for driving the pump shaft; and a control circuit. The conveying element is arranged in a pump chamber formed by the pump housing and a spiral lid. The electric motor is arranged in a motor chamber formed by the pump housing and motor lid. Furthermore, a control circuit chamber is formed in the pump housing, for the control circuit. The control circuit chamber has an opening through which the control circuit can be inserted into the control circuit chamber.

1 . An electric coolant pump including:
 a pump housing;   a rotating conveying element for accelerating the coolant to be conveyed;   a pump shaft, passing through the pump housing, on which the conveying element is mounted;   an electric motor for driving the pump shaft; and   a control circuit;   
       wherein:
 the conveying element is arranged in a pump chamber formed by the pump housing and a spiral lid; 
 the electric motor is arranged in a motor chamber formed by the pump housing and a motor lid; 
 in the pump housing, a control circuit chamber is provided, inside of which the control circuit is arranged; and 
 the control circuit chamber has an opening, through which the control circuit is insertable into the control circuit chamber. 
 
     
     
         2 . The electric coolant pump according to  claim 1 , wherein the control circuit chamber is arranged in an axial direction of the pump shaft between the pump chamber and the motor chamber, and the insertion direction is oriented perpendicularly with respect to the axial direction of the pump shaft. 
     
     
         3 . The electric coolant pump according to  claim 1 , wherein the control circuit chamber is provided immediately adjacent to the pump chamber. 
     
     
         4 . The electric coolant pump according to  claim 1 , wherein the control circuit is fixed by means of a thermal paste or a thermal conductive pad in the control circuit chamber, particularly in the direction of the pump chamber. 
     
     
         5 . The electric coolant pump according to  claim 1 , wherein the control circuit chamber extends in a U-shaped manner around the pump shaft. 
     
     
         6 . The electric coolant pump according to  claim 1 , wherein the control circuit is arranged on a rectangular or U-shaped circuit board. 
     
     
         7 . The electric coolant pump according to  claim 1 , wherein the opening of the control circuit chamber is closed by a lid. 
     
     
         8 . The electric coolant pump according to  claim 7 , wherein, in the lid, a connector plug is provided for the control circuit. 
     
     
         9 . The electric coolant pump according to  claim 1 , wherein, adjacent to the control circuit chamber, a leakage space for receiving escaping coolant is provided in the pump housing. 
     
     
         10 . The electric coolant pump according to  claim 1 , wherein a winding of the electric motor is contactable by insulation-displacement connections when inserting the control circuit into the control circuit chamber.