Blower device

Abstract

A blower device for a vehicle includes at least two blowers having fan shafts arranged in parallel with each other, a single motor for driving and rotating the blowers, and a shroud for holding the two blowers. The motor includes a motor portion and a motor shaft driven by and extending from the motor portion. The shroud has shroud ring portions each of which has a circular shape to cover an outer peripheral portion of the blower, and a shroud plate portion extending from the shroud ring portions to an outside. Furthermore, the fan shafts of the blowers are coupled to the motor shaft via a gear portion, and the motor portion is attached to the shroud plate portion to be offset from a center connection line connecting the centers of the shroud ring portions.

1 . A blower device for a vehicle, comprising:
 a plurality of blowers having fan shafts arranged in parallel with each other, for blowing air toward a heat exchanger mounted to the vehicle;   a single motor for driving and rotating the blowers, the motor having a motor shaft;   a shroud for holding the blowers and for forming air passages from the heat exchanger to the blowers, wherein the shroud includes a plurality of shroud ring portions each of which has a circular shape to surround an outer peripheral portion of the blower, and a shroud plate portion extending smoothly from a rear side of the heat exchanger to the shroud ring portions; and   a gear portion through which the fan shafts are coupled to the motor shaft,   wherein the motor is located downstream from the shroud plate portion to be offset from a center connection line connecting centers of the shroud ring portions.   
   
   
       2 . The blower device according to  claim 1 , wherein:
 the shroud ring portions are defined in the shroud plate portion;   the shroud plate portion has an approximately rectangular outer peripheral shape with four corner portions outside of the shroud ring portions; and   the motor is located between one corner portion and the shroud ring portion adjacent to the one corner portion.   
   
   
       3 . The blower device according to  claim 1 , wherein:
 the motor is located between adjacent two shroud ring portions to be offset from the center connection line connecting the centers of the adjacent two shroud ring portions.   
   
   
       4 . The blower device according to  claim 1 , wherein:
 each of the blowers includes two contrarotating axial fans which are located to be rotated reversely with each other in accordance with rotations of its rotation shafts arranged on an axial line.   
   
   
       5 . The blower device according to  claim 1 , wherein:
 adjacent two blowers are connected to each other via a connection shaft; and   the motor shaft is tilted from an extension line of the connection shaft.   
   
   
       6 . The blower device according to  claim 1 , wherein:
 adjacent two blowers are connected to each other via a connection shaft; and   the motor shaft is approximately perpendicular to an extension line of the connection shaft.   
   
   
       7 . The blower device according to  claim 1 , wherein:
 the motor includes a motor portion connected to the motor shaft to rotate the motor shaft; and   all upstream area of the motor portion is covered by the shroud plate portion.   
   
   
       8 . A blower device comprising:
 at least two blowers having fan shafts arranged in parallel with each other;   a single motor for driving and rotating the two blowers, wherein the motor includes a motor portion and a motor shaft driven by and extending from the motor portion;   a shroud for holding the two blowers, wherein the shroud includes two shroud ring portions each of which has a circular shape to cover an outer peripheral portion of the blower, and a shroud plate portion extending from the shroud ring portions to an outside; and   a gear portion through which the fan shafts of the blowers are coupled to the motor shaft,   wherein the motor portion is attached to the shroud plate portion at a position offset from a center connection line connecting centers of the shroud ring portions.   
   
   
       9 . The blower device according to  claim 8 , wherein:
 the two blowers are coupled to each other via a connection shaft; and   the motor shaft is tilted from an extension line of the connection shaft.   
   
   
       10 . The blower device according to  claim 8 , wherein:
 the two blowers are coupled to each other via a connection shaft; and   the motor shaft is approximately perpendicular to an extension line of the connection shaft between the two shroud ring portions.