Blower

Abstract

A blower includes a first axial fan, a second axial fan, a first current plate, and a holder. The second axial fan is located on one side in the axial direction with respect to the first axial fan. In the first current plate, first hollow cells partitioned by a lattice-shaped first partition wall and penetrating in the axial direction are two-dimensionally arranged. The holder holds the first current plate. The first axial fan is connected in series with the second axial fan in the axial direction via the first current plate and the holder. The holder includes a support portion that includes opening portions opened in the axial direction and is located on one side in the axial direction of the first current plate. Rigidity of the support portion is higher than rigidity of the first current plate.

What is claimed is: 
     
         1 . A blower comprising:
 a first axial fan;   a second axial fan located on one side in an axial direction with respect to the first axial fan;   a first current plate in which first hollow cells, partitioned by a lattice-shaped first partition wall and penetrating in the axial direction, are two-dimensionally arranged; and   a holder that holds the first current plate; wherein   the first axial fan is connected in series with the second axial fan in the axial direction via the first current plate and the holder;   the holder includes a support portion that includes opening portions opened in the axial direction and is located on one side in the axial direction of the first current plate; and   rigidity of the support portion is higher than rigidity of the first current plate.   
     
     
         2 . The blower according to  claim 1 , wherein an intake port of the second axial fan is connected to an exhaust port of the first axial fan via the first current plate and the support portion. 
     
     
         3 . The blower according to  claim 1 , wherein at least some of the opening portions of the support portion have a shape extending in the axial direction. 
     
     
         4 . The blower according to  claim 1 , wherein the first current plate includes a honeycomb structure in which the first hollow cells each having a hexagonal shape when viewed from the axial direction are two-dimensionally arranged. 
     
     
         5 . The blower according to  claim 1 , wherein
 the first axial fan includes:
 an impeller including a rotor blade rotatable about a central axis extending in the axial direction; 
 a motor that drives the impeller to rotate the rotor blade; 
 a housing having a tubular shape extending in the axial direction and accommodating the impeller and the motor; and 
 a connecting portion that connects the housing and the motor and supports the motor; 
   the holder further includes:
 a base portion that overlaps the motor when viewed from the axial direction; and 
 a holding tube portion that has a tubular shape extending in the axial direction and surrounds the base portion; 
   the support portion further includes support ribs extending from a radially outer end of the base portion to the holding tube portion and arranged in a circumferential direction; and   at least a portion of radially outer ends of the support ribs is connected to a radially inner surface of the holding tube portion.   
     
     
         6 . The blower according to  claim 5 , wherein at least a portion of the first current plate has an annular shape, and is located between the base portion and the holding tube portion. 
     
     
         7 . The blower according to  claim 5 , wherein at least one of the support ribs extends in the radial direction from the base portion. 
     
     
         8 . The blower according to  claim 5 , wherein
 the connecting portion extends in one circumferential direction radially outward; and   the support ribs extend toward another circumferential direction radially outward.   
     
     
         9 . The blower according to  claim 1 , wherein
 the first axial fan includes:
 an impeller including a rotor blade rotatable about a central axis extending in the axial direction; and 
 a motor that drives the impeller to rotate the rotor blade; 
   the holder further includes:
 a base portion that overlaps the motor when viewed from the axial direction; and 
 a holding tube portion that has a tubular shape extending in the axial direction and surrounds the base portion; 
   the support portion further includes a second current plate located between the base portion and the holding tube portion; and   the opening portions are second hollow cells of the second current plate, the second hollow cells being partitioned by a lattice-shaped second partition wall and two-dimensionally arranged.   
     
     
         10 . The blower according to  claim 9 , wherein the second current plate has a honeycomb structure in which the second hollow cells each having a hexagonal shape when viewed from the axial direction are two-dimensionally arranged. 
     
     
         11 . The blower according to  claim 5 , wherein a minimum opening area of the opening portions is equal to or larger than a maximum opening area of the first hollow cells of the first current plate when viewed from the axial direction. 
     
     
         12 . The blower according to  claim 5 , wherein
 when viewed from the axial direction, an outer edge portion of the base portion:   overlaps an outer edge portion of another axial end of the motor; or   is located radially inward of the outer edge portion of the other axial end of the motor.   
     
     
         13 . The blower according to  claim 5 , further comprising a lock provided on one of the base portion and the motor, and is locked to another one of the base portion and the motor.