Pump assembly

Abstract

A pump assembly having a drive module with a stator, a rotor held on a shaft so as to be rotatable relative to the stator, and a housing that circumferentially encloses a portion of the stator. An impeller is held on the shaft, and a hydraulic unit has an intake port through which liquid can be delivered to the impeller. An adapter is connected to the drive module on one side and to the hydraulic unit on the other side. A can body extends between the rotor and the stator of the drive module and encloses the rotor on an end face facing away from the impeller. A can flange adjoins the can body on a side facing the impeller and projects radially outward from the can body. A tubular section circumferentially encloses the impeller at least in part and delimits a pump chamber containing the impeller.

What is claimed is: 
     
         1 . A pump assembly for water-carrying cleaning appliances, the pump assembly comprising:
 a drive module with a stator, a rotor held on a shaft of the drive module so as to be rotatable relative to the stator, and a housing that circumferentially encloses at least sections of the stator;   an impeller for pumping liquid that is held on the shaft;   a hydraulic unit with an intake port through which the liquid is adapted to be delivered to the impeller; and   an adapted arranged between the drive module and the hydraulic unit, the adapter being connected on one side to the drive module and on the other side to the hydraulic unit, the adapter comprising:
 a can body that extends between the rotor and the stator of the drive module, and encloses the rotor on an end face facing away from the impeller; 
 a can flange adjoining the can body on a side facing the impeller, the can flange projecting radially outward from the can body at least in sections; 
 a tubular section that circumferentially encloses the impeller at least in part and that delimits a pump chamber containing the impeller; and 
 a discharge port formed on the tubular section for discharging the liquid from the pump chamber. 
   
     
     
         2 . The pump assembly according to  claim 1 , wherein the pump assembly is a modular pump assembly and has a first hydraulic unit and at least one additional hydraulic unit, wherein a choice of the first hydraulic unit or the at least one additional hydraulic unit is attached to the adapter on a side opposite the drive module, and wherein at least the first hydraulic unit or the at least one additional hydraulic unit has a heater for heating the liquid. 
     
     
         3 . The pump assembly according to  claim 1 , wherein the intake port on the first hydraulic unit and the intake port on the at least one additional hydraulic unit are provided coaxially to the shaft. 
     
     
         4 . The pump assembly according to  claim 1 , wherein the hydraulic unit provides an end wall that radially encloses the intake port, and wherein, together with the tubular section of the adapter, the can body and the can flange delimits the pump chamber. 
     
     
         5 . The pump assembly according to  claim 1 , wherein a spiral baffle for the liquid is arranged in the region of the can flange. 
     
     
         6 . The pump assembly according to  claim 1 , wherein the intake port is multipart in design, wherein a first tubular part of the intake port and a second tubular part of the intake port are placed one inside the other and snapped together, and wherein a preloaded axial seal is provided between the two tubular parts and/or between one tubular part and the end wall of the hydraulic unit. 
     
     
         7 . The pump assembly according to  claim 1 , wherein the heater for the liquid is integrated in the end wall of the hydraulic unit. 
     
     
         8 . The pump assembly according to  claim 1 , wherein the heater is a tubular heater, and wherein the tubular heater is provided between an end wall of a hydraulic unit and the tubular section of the adapter or in a region of the intake port upstream of the hydraulic unit or in the pump chamber adjacent to an inner circumferential surface of the tubular section between the can flange of the adapter and the end wall of the hydraulic unit. 
     
     
         9 . The pump assembly according to  claim 1 , wherein the discharge port projects radially and/or tangentially from the tubular section. 
     
     
         10 . The pump assembly according to  claim 1 , wherein the adapter has a spiral shape in a region of the tubular section. 
     
     
         11 . The pump assembly according to  claim 1 , wherein, in order to detachably connect the adapter to any desired hydraulic unit, a fastenor is provided on the adapter, and wherein a mating fastenor is provided on the first hydraulic unit and on the at least one additional hydraulic unit such that the mating fastenor of the first hydraulic unit and the mating fastenor of the at least one additional hydraulic unit are placed on the fastenor of the adapter.