Extractor hood

Abstract

An extractor hood ( 10 ) for the separation of dirt particles, and especially fat and oil droplets from airflow is described. Extractor hood ( 10 ) includes a fan unit ( 18 ) for the creation of exhaust airflow through the extractor hood and a separator unit ( 20 ) to deposit dirt particles from the exhaust air flow. The separator unit ( 20 ) defines at least one air duct ( 25 a, 25 b ). Along the at least one air duct ( 25 a, 25 b ) an impact element ( 40 ) is arranged, featuring at least in certain areas capillary holes ( 44 ) for separating dirt particles through the capillary holes ( 44 ) along the at least one air duct ( 25 a, 25 b ).

1 . Extractor hood ( 10 ) for separation of dirt particles and especially fat and oil droplets from airflow, including:
 a fan unit ( 18 ) to create an exhaust airflow through extractor hood ( 10 ); and   a separator unit ( 20 ) to deposit dirt particles from the exhaust airflow;   characterized by   the separator unit ( 20 ) defining at least one air duct ( 25   a,    25   b ), where along the at least one air duct ( 25   a,    25   b ) an impact element ( 40 ) is arranged, which has at least in certain areas capillary holes ( 44 ) for separating dirt particles from the air flow along the at least one air duct ( 25   a,    25   b ) through the capillary holes ( 44 ).   
     
     
         2 . Extractor hood ( 10 ) according to  claim 1 , where the impact element ( 40 ) in the at least one air duct ( 25   a,    25   b ) is arranged in such way downstream from a redirection of the redirection flow that dirt particles, due to the centrifugal forces on the impact element ( 40 ), are deposited. 
     
     
         3 . Extractor hood ( 10 ) according to  claim 1 , where the capillary holes ( 44 ) have a diameter of approx. 0.5 to 5 mm. 
     
     
         4 . Extractor hood ( 10 ) according to  claim 3 , where the capillary holes ( 44 ) have a diameter in the range of approx. 1 to 3 mm. 
     
     
         5 . Extractor hood ( 10 ) according to  claim 1 , where the separator unit ( 20 ) defines a first air duct ( 25   a ) and a second air duct ( 25   b ), where the first air duct ( 25   a ) with regard to a symmetry plane of the separator unit ( 20 ) is mirror-symmetric to the second air duct ( 25   a ). 
     
     
         6 . Extractor hood ( 10 ) according to  claim 5 , where the impact element ( 40 ) is designed both along the first air duct ( 25   a ) as well as along the second air duct ( 25   b ). 
     
     
         7 . Extractor hood ( 10 ) according to  claim 5 , where the impact element ( 40 ) has a flat front section ( 40   a ), a flat rear section ( 40   b ) and a curved connecting section ( 42 ), which connects the flat front section ( 40   a ) with the flat rear section ( 40   b ). 
     
     
         8 . Extractor hood ( 10 ) according to  claim 7 , where the impact element ( 40 ) has a U-shaped profile, where the flat front section ( 40   a ) runs mainly parallel to the flat rear section ( 40   b ). 
     
     
         9 . Extractor hood ( 10 ) according to  claim 7 , where both the flat front section ( 40   a ) as well as the flat rear section ( 40   b ) of the impact element are provided with capillary holes. 
     
     
         10 . Extractor hood ( 10 ) according to  claim 9 , where the separator unit ( 20 ) further includes a base element ( 30 ), a central element ( 50 ) and a ceiling element ( 60 ), which define by their shape and relative array together with impact element ( 40 ) the first air duct ( 25   a ) and the second air duct ( 25   b ). 
     
     
         11 . Extractor hood ( 10 ) according to  claim 10 , where the first air duct ( 25   a ) and the second air duct ( 25   b ) are designed in such way that the airflow direction entering through the air inlets ( 22   a,    22   b ) into the separator unit ( 20 ) is several times redirected to deposit dirt particles. 
     
     
         12 . Extractor hood ( 10 ) according to  claim 11 , where the impact element ( 40 ) above base element ( 30 ) is arranged in such way that between the curved connecting section ( 42 ) of impact element ( 40 ) and a complementary shaped depression ( 38 ) in a central area ( 34 ) of the base element a gap is formed. 
     
     
         13 . Extractor hood ( 10 ) according to  claim 12 , where the curved connecting section ( 42 ) of impact element ( 40 ) is designed in such way that dirt particles collecting on the inner side of connecting section ( 42 ) can drain off to the depression ( 38 ) defined by the central area ( 34 ) of base element ( 30 ). 
     
     
         14 . Extractor hood ( 10 ) according to  claim 10 , where base element ( 30 ), impact element ( 40 ), central element ( 50 ) and ceiling element ( 60 ) are designed to be removable from separator unit ( 20 ). 
     
     
         15 . Extractor hood ( 10 ) according to  claim 1 , where the extractor hood ( 10 ) further features a removable control knob ( 14 ), with which in connection with a control unit the fan unit power and light of the extractor hood ( 10 ) can be controlled. 
     
     
         16 . Extractor hood ( 10 ) according to  claim 8 , where both the flat front section ( 40   a ) as well as the flat rear section ( 40   b ) of the impact element are provided with capillary holes. 
     
     
         17 . Extractor hood ( 10 ) according to  claim 16 , where the separator unit ( 20 ) further includes a base element ( 30 ), a central element ( 50 ) and a ceiling element ( 60 ), which define by their shape and relative array together with impact element ( 40 ) the first air duct ( 25   a ) and the second air duct ( 25   b ). 
     
     
         18 . Extractor hood ( 10 ) according to  claim 17 , where the first air duct ( 25   a ) and the second air duct ( 25   b ) are designed in such way that the airflow direction entering through the air inlets ( 22   a,    22   b ) into the separator unit ( 20 ) is several times redirected to deposit dirt particles. 
     
     
         19 . Extractor hood ( 10 ) according to  claim 18 , where the impact element ( 40 ) above base element ( 30 ) is arranged in such way that between the curved connecting section ( 42 ) of impact element ( 40 ) and a complementary shaped depression ( 38 ) in a central area ( 34 ) of the base element a gap is formed. 
     
     
         20 . Extractor hood ( 10 ) according to  claim 19 , where the curved connecting section ( 42 ) of impact element ( 40 ) is designed in such way that dirt particles collecting on the inner side of connecting section ( 42 ) can drain off to the depression ( 38 ) defined by the central area ( 34 ) of base element ( 30 ). 
     
     
         21 . Extractor hood ( 10 ) according to  claim 17 , where base element ( 30 ), impact element ( 40 ), central element ( 50 ) and ceiling element ( 60 ) are designed to be removable from separator unit ( 20 ).