Fan module

Abstract

A fan module includes a module housing, a first set of stationary blades, a second set of stationary blades, a motor, and a dynamic blade combination. The module housing has a channel having an inlet. The first and second sets of stationary blades are disposed at the inner wall of the module housing. The motor is disposed in the channel and includes a rotor. The dynamic blade combination includes a hub fixed to a periphery of the rotor, and a first set of dynamic blades and a second set of dynamic blades that surround and are disposed to a periphery of the hub. The first set of dynamic blades is located between the inlet and the first set of stationary blades. The second set of dynamic blades is located between the first and second set of stationary blades.

What is claimed is: 
     
         1 . A fan module, comprising:
 a module housing having a channel, wherein two ends of the channel are respectively an inlet and an outlet;   a first and second set of stationary blades disposed at the inner wall of the module housing and located in the channel;   a motor disposed in the channel and comprising a rotor; and   a dynamic blade combination, comprising:
 a hub fixed to a periphery of the rotor and driven by the motor to rotate; 
 a first set of dynamic blades; and 
 a second set of dynamic blades; 
 wherein, the first and second set of dynamic blades surround and are disposed at a periphery of the hub, the first set of dynamic blades are located between the inlet and the first set of stationary blades, and the second set of dynamic blades are located between the first set of stationary blades and the second set of stationary blades. 
   
     
     
         2 . The fan module of  claim 1 , wherein the channel comprises:
 a converging section connected to the inlet and tapered off from the inlet toward the outlet, wherein the first set of dynamic blades are located at the converging section;   a diverging section connected to the outlet and tapered off from the outlet toward the inlet; and   a supercharged section connected between the converging section and the diverging section, wherein the second set of dynamic blades are located at the supercharged section.   
     
     
         3 . The fan module of  claim 2 , wherein the first and second set of stationary blades are located at the supercharged section. 
     
     
         4 . The fan module of  claim 2 , wherein the hub is adjacent to the inlet, and diameters of the part of the hub located at the converging section are tapered off toward the inlet. 
     
     
         5 . The fan module of  claim 2 , wherein the motor is adjacent to the outlet, the motor comprises a motor housing, and diameters of the part of the motor housing located at the diverging section are tapered off toward the outlet. 
     
     
         6 . The fan module of  claim 5 , wherein the motor housing is connected with the second set of stationary blades and thus is fixed in the channel. 
     
     
         7 . The fan module of  claim 1 , wherein the blade number of the first set of the dynamic blades is smaller than the blade number of the second set of dynamic blades, and the blade dimension of the first set of dynamic blades is greater than the blade dimension of the second set of dynamic blades. 
     
     
         8 . The fan module of  claim 1 , wherein the first and second set of dynamic blades aslant surround and are disposed at a periphery of the hub substantially along a same trend. 
     
     
         9 . The fan module of  claim 8 , wherein a trend of the first set of stationary blades disposed in the channel and a trend of the second set of stationary blades disposed in the channel are both different from the trend of the first and second set of dynamic blades surrounding and disposed at the periphery of the hub. 
     
     
         10 . The fan module of  claim 1 , wherein the first and second set of stationary blades are aslant disposed in the channel substantially along a same trend.