Domestic clothes drier with twin fan

Abstract

Dryer with a drum ( 1 ) where the clothes must be placed, one fan ( 5 ) blowing a drying air current through such drum, a condenser ( 3 ) in which such drying air current enters, a cooling air duct ( 4 ) blowing a second fresh air current through the condenser, produced by a second fan ( 6 ) connected to the air duct; at least one of these fans is composed of one set of external blades ( 10, 11, 12 ) and a second set of internal blades ( 21, 22, 23 ) that spin on a common axle (X), and the blades of the first set are laid out along one cylindrical structure, while the second set of blades are laid out along a second cylindrical structure inside the first one.

1 . Clothes drying machine or combined clothes washing and drying machine comprising a drum ( 1 ) containing the clothes to be dried, at least one first fan ( 5 ) able to blow a first flow of drying air through said drum, optionally a condenser ( 3 ) inside which said drying air flow is made to pass and an associated cooling air duct ( 4 ) which conveys a second flow of fresh air through said condenser ( 3 ), said second flow being actuated by a second fan ( 6 ) associated with said air duct ( 4 ), characterized in that at least one of said fans ( 5 ,  6 ) is formed by means of a first set of outer vanes ( 10 ,  11 ,  12 ) and a second set of inner vanes ( 21 ,  22 ,  23 ) rotating with respect to a common axis (X), in that the vanes of the first set of vanes are distributed on a first cylindrical form, and in that the vanes of the second set of vanes are arranged along a second cylindrical form which is different from the first cylindrical form and are arranged inside said first cylindrical form. 
   
   
       2 . Machine according to  claim 1 , characterized in that a base of the cylinder which is defined by the first set of vanes is at least partly closed by a wall (P). 
   
   
       3 . Machine according to  claim 2 , characterized in that the vanes of the second set of vanes arranged internally are fixed at one of their ends to said wall (P). 
   
   
       4 . Machine according to any one of the preceding claims, characterized in that said vanes of said first set are radial with respect to said common axis (X). 
   
   
       5 . Machine according to  claim 4 , characterized in that said vanes of the second set of inner vanes ( 20 ,  21 ,  22 ) are oriented in a non-radial direction with respect to said common axis and have a given inclination (i) with respect to the respective radial planes passing through them. 
   
   
       6 . Machine according to  claim 5 , characterized in that said given inclination is such that the outer edges ( 45 ,  46 ,  47 ) of respective inner vanes are situated further forwards than the respective inner edges ( 45 A,  46 A,  47 A). 
   
   
       7 . Machine according to any one of the preceding claims, characterized in that said inner vanes have a concave surface (C 1 , C 2 , C 3 ) directed in the sense of rotation of said fan.