Heatable part of a pump housing

Abstract

The description relates to a heatable pump housing part comprising a heat distribution sheet fixed on the housing part and a tubular heating element fixed on the heat distribution sheet. According to the invention the tubular heating element is positioned in a groove or a step on the housing part that is covered by the heat distribution sheet.

1 . Heatable pump housing part comprising;
 a heat distribution sheet fixed on the housing part;   and a tubular heating element fixed on the heat distribution sheet, the tubular heating element being positioned in a groove or a step on the housing part covered by the heat distribution sheet.   
   
   
       2 . Pump housing part according to  claim 1 , wherein the step forms one wall of a groove, in which the tubular heating element is positioned. 
   
   
       3 . Housing part according to  claim 2 , wherein the tubular heating element touches both the walls of the groove. 
   
   
       4 . Pump housing part according to  claim 2 , wherein the heat distribution sheet extends beyond the groove or step on both sides. 
   
   
       5 . Pump housing part according to  claim 2 , wherein the heat distribution sheet projects above the groove or step on both sides by at least 0.5 cm. 
   
   
       6 . Pump housing part according to  claim 1 , wherein the groove is U- or C-shaped. 
   
   
       7 . Pump housing part according to  claim 1 , wherein the tubular heating element is positioned on a cover or bottom surface of the housing part. 
   
   
       8 . Pump housing part according to  claim 1 , wherein the tubular heating element has a trapezoidal cross-section. 
   
   
       9 . Pump housing part according to  claim 1 , wherein the groove or step has two surfaces running aslant to one another. 
   
   
       10 . Pump housing part according to  claim 1 , wherein the groove or step has two surfaces running perpendicular to one another. 
   
   
       11 . Pump housing part according to  claim 1 , wherein the heat distribution sheet comprises securing straps encompassing the tubular heating element. 
   
   
       12 . Pump housing part according to  claim 11 , wherein the securing straps are cut out from the heat distribution sheet and bent upwards. 
   
   
       13 . Pump housing part according to  claim 1 , wherein the tubular heating element includes a support plate for fixing a safety switch. 
   
   
       14 . Pump housing part according to  claim 1 , wherein the pump housing part is in the form of a connecting tube, the connecting tube being surrounded by the tubular heating element. 
   
   
       15 . Pump housing part according to  claim 1 , wherein the tubular heating element has a trapezoidal cross-section and is positioned on the heat distribution sheet with a trapezoidal footprint on the plate 
   
   
       16 . Pump housing part according to  claim 1 , wherein the tubular heating element has a trapezoidal cross-section and is positioned on the heat distribution sheet with a surface opposite to the trapezoid footprint on the plate. 
   
   
       17 . Pump housing part according to  claim 1 , wherein the heat distribution sheet is made of aluminium or an aluminium alloy. 
   
   
       18 . Pump housing part according to  claim 1 , wherein the housing part is made of steel. 
   
   
       19 . Pump housing part according to  claim 1 , wherein the heat distribution sheet has a thickness ranging from 1 mm to 1.5 mm. 
   
   
       20 . Pump housing part according to  claim 1 , wherein the tubular heating element is in contact with at least two surfaces of the heat distribution sheet running diagonally to one another.