Fan

Abstract

According to an aspect, there is provided a fan including: a housing defining an opening which extends through the housing; a first air flow channel defined within the housing, having a first air inlet, a first air outlet and a first impeller for driving air from the first inlet to the first outlet; and a second air flow channel defined within the housing, including a second air inlet, a second air outlet and a second impeller for driving air from the second inlet to the second outlet, wherein the first and second air outlets draw air through the opening.

1 . A fan comprising:
 a housing whose inner surface defines an opening which extends through the housing, wherein the fan is configured such that, in use, air flows through the opening from a back to a front of the housing;   a first air flow channel defined within the housing, comprising a first air inlet, a first air outlet and a first impeller for driving air from the first inlet to the first outlet; and   a second air flow channel defined within the housing, comprising a second air inlet, a second air outlet and a second impeller for driving air from the second inlet to the second outlet,   wherein the first and second air outlets are configured to draw air through the opening,
 are located towards the front of the housing, and the first and second air inlets are located towards the back, and 
   wherein the first and second air inlets are located on the inner surface of the housing.   
     
     
         2 . The fan of  claim 1 , wherein the housing defines a centreplane (C), and wherein the first impeller is on one side of the centreplane and the second impeller is on the other side of the centreplane. 
     
     
         3 . The fan of  claim 2 , wherein the first and second impellers ( 4 ,  11 ) have a rotation axis (A), and the first and second impellers are arranged such that the rotation axes are parallel with the centreplane. 
     
     
         4 . The fan of  claim 1 , wherein the housing comprises an elongate housing, the first impeller being adjacent a first end of the elongate housing, and the second impeller being adjacent a second end of the elongate housing, opposite the first end. 
     
     
         5 . The fan of  claim 1 , wherein the housing is substantially cylindrical. 
     
     
         6 . The fan of  claim 1 , wherein the first air flow channel includes a right inlet chamber located at a right hand side of the opening, a top or bottom chamber of the first air flow channel respectively located above or below the opening, and a left outlet chamber located at a left hand side of the opening, and
 wherein the second air flow channel includes a left inlet chamber located at the left hand side of the opening, a bottom or top chamber of the second air flow channel respectively located below or above the opening and opposite the top or bottom chamber of the first air flow channel, and a right outlet chamber located at the right hand side of the opening.   
     
     
         7 . The fan of  claim 6 , wherein the first and second inlets are located at opposite sides of the opening. 
     
     
         8 . The fan of  claim 1 , wherein at least one of the first and second air flow channels comprises a filter. 
     
     
         9 . The fan of  claim 8 , wherein the filter is located between the air inlet and the impeller. 
     
     
         10 . The fan of  claim 1 , wherein at least one of the first and second air flow channels comprises at least one of a heating element and a humidifier. 
     
     
         11 . The fan of  claim 1 , wherein the first and second air outlets each comprise a curved guiding surface. 
     
     
         12 . The fan of  claim 1 , wherein the first and second air outlets further comprise a slit shaped outlet. 
     
     
         13 . The fan of  claim 1 , wherein the first and second air outlets are located at opposite sides of the opening.