Electric heating fan

Abstract

The invention is directed to a heating fan ( 100 ) with an inner space ( 110 ) in which is arranged an air channel ( 810 ) which is partially made of plastic. An electric heating body ( 300 ) is arranged behind a fan ( 800 ) in an air flow direction ( 821 ). According to the invention, this fan is constructed such that a fan wheel ( 801 ) of a radial fan, which fan wheel ( 801 ) is contained in the fan ( 800 ), has two suction sides ( 805, 806 ) which are separated by a dividing wall ( 804 ). During operation, a first air flow ( 822 ) is sucked in from outside ( 1 ) through the first suction side ( 805 ) which is open to a first air inlet opening ( 221 ). The second suction side ( 806 ) is arranged in a fan space ( 111 ) of the heating fan ( 100 ) and is pneumatically connected to second air inlet openings ( 222 ). The fan is arranged in front of a ceramic heating element ( 301 ) of the electric heating body ( 300 ) so that the first air flow ( 822 ) and the second air flow ( 823 ) stream through the heating body ( 300 ).

1 . A heating fan with an inner space having an air channel, comprising:
 an electric heating body arranged behind a fan in an air flow direction,   wherein the fan has a fan wheel of a radial fan with a first suction side and a second suction side which are separated by a dividing wall,   wherein the first suction side is open to a first air inlet opening through which a first air flow is sucked in from outside through the first suction side during operation,   wherein the second suction side is arranged in a fan space of the heating fan, and the second suction side is pneumatically connected to second air inlet openings, and the fan is arranged in front of the electric heating body so that the first air flow and the second air flow stream through the heating body.   
     
     
         2 . The heating fan according to  claim 1 , wherein a guide wall through which the fan space is formed is arranged in the inner space so that at least some of the second air flow is guided to the second suction side. 
     
     
         3 . The heating fan according to  claim 1 , wherein the fan space is situated between the second suction side and the second air inlet opening so that air flows out of an inner space into the second suction side during operation of the heating device. 
     
     
         4 . The heating fan according to  claim 1 , wherein the fan has an exhaust opening through which a total air flow is guided to the heating body during operation of the heating fan, and the heating body is arranged behind the exhaust side in air flow direction. 
     
     
         5 . The heating fan according to  claim 1 , wherein the second air inlet opening is arranged in the rear wall. 
     
     
         6 . The heating fan according to  claim 1 , wherein the first air inlet opening has a larger opening area than the second air inlet opening, wherein the first air inlet opening makes up in particular approximately 55% to 90% of the total opening area of first air inlet opening and second air inlet opening so that the mass flow of the first air flow is greater than the mass flow of the second air flow during operation of the heating fan, and the mass flow through the first opening amounts in particular to approximately 60% to 80% of the total mass flow. 
     
     
         7 . The heating fan according to  claim 1 , wherein the fan wheel of the fan has first blades which are arranged toward the first suction side, and in that second blades of the fan are arranged toward the second suction side. 
     
     
         8 . The heating fan according to  claim 1 , wherein the first blades and the second blades of the fan wheel are separated by a dividing wall. 
     
     
         9 . The heating fan according to  claim 1 , wherein the first blades are larger than the second blades, in particular at least approximately 50% larger. 
     
     
         10 . The heating fan according to  claim 1 , wherein the electric heating body is a ceramic heating element.