Mixing fan

Abstract

The invention relates to a fan comprising a housing and a fan wheel arranged on a motor shaft and being drivable by a motor. According to the invention, the fan is designed as a mixing fan for transporting and mixing a combustible medium with air, wherein at least the fan wheel is designed in an insulating manner.

1 . A fan comprising a housing and a fan wheel arranged on a motor shaft and being drivable by a motor,
 the fan being designed as a mixing fan for transporting and mixing a combustible medium with air and   at least the fan wheel being designed in an insulating manner.   
     
     
         2 . The fan according to  claim 1 , wherein the fan wheel can be mounted and operated without earthing. 
     
     
         3 . The fan according to  claim 1 , wherein the fan wheel is arranged on the motor shaft without earthing. 
     
     
         4 . The fan according to  claim 1 , wherein the fan wheel and/or the housing is/are made from pure grade plastics material. 
     
     
         5 . The fan according to  claim 1 , wherein the housing is designed in an insulating manner. 
     
     
         6 . The fan according to  claim 1 , wherein the housing can be mounted and operated without earthing. 
     
     
         7 . The fan according to  claim 1 , wherein the fan wheel and/or the housing have a surface resistivity R o  in excess of 10 9  ohm. 
     
     
         8 . The fan according to  claim 1 , wherein the overall surface area of the fan wheel, comprising at least the upper and lower surface of the fan wheel, is in the range between 25 cm 2  and 500 cm 2 . 
     
     
         9 . The fan according to  claim 1 , wherein the overall surface area of the housing is in the range between 25 cm 2  and 1000 cm 2 . 
     
     
         10 . The fan with a shaft bearing according to  claim 1 , wherein the at least one shaft bearing and/or the motor shaft and/or the shaft seal is designed in an insulating manner. 
     
     
         11 . The fan according to  claim 1 , wherein the shaft seal is made from pure grade material. 
     
     
         12 . The fan according to  claim 1 , wherein the fan wheel and/or the housing is/are uncoated. 
     
     
         13 . The fan with a suction area according to  claim 1 , wherein the suction area is designed in the form of a venturi nozzle. 
     
     
         14 . The fan according to  claim 1 , wherein the gas is supplied in or before the suction area. 
     
     
         15 . A fan wheel adapted for use in an insulating manner in a mixing fan for transporting and mixing a combustible medium with air.