Fan frame body structure

Abstract

A fan frame body structure includes a fan frame. The fan frame has an air inlet and an air outlet. The fan frame body structure is characterized in that the fan frame is composed of multiple frame layers, which are stacked to form the fan frame. The respective frame layers are made of different materials of different compositions with totally different vibration frequencies. The multiple frame layers of different materials with different vibration frequencies are stacked to form the fan frame so as to greatly reduce the co-vibration of the fan frame and lower the noise.

What is claimed is: 
     
         1 . A fan frame body structure comprising a fan frame, the fan frame having an air inlet and an air outlet respectively positioned on two sides of the fan frame, the fan frame body structure being characterized in that the fan frame is composed of multiple frame layers, which are stacked to form the fan frame, the respective frame layers being made of different materials of different compositions with different vibration frequencies, the multiple frame layers of different materials with different vibration frequencies being stacked to form the fan frame so as to reduce the co-vibration of the fan frame and lower the noise. 
     
     
         2 . The fan frame body structure as claimed in  claim 1 , wherein the frame layers are made of plastic materials selected from a group consisting of PBT, PA66, PPE, PA, PC, ABS and PPS. 
     
     
         3 . A fan frame body structure comprising a fan frame, the fan frame having an air inlet and an air outlet respectively positioned on two sides of the fan frame, the fan frame body structure being characterized in that the fan frame includes:
 a first frame layer vibrating at a first vibration frequency; and   a second frame layer directly overlaid or formed on the first frame layer in an axial direction of the fan frame, the second frame layer vibrating at a second vibration frequency, the first frame layer being made of a material of a composition different from that of the second frame layer so that the first vibration frequency of the first frame layer is different from the second vibration frequency of the second frame layer.   
     
     
         4 . The fan frame body structure as claimed in  claim 3 , wherein the first frame layer is made of a plastic material selected from a group consisting of PBT, PA66, PPE, PA, PC, ABS and PPS, while the second frame layer is made of another plastic material selected from a group consisting of PBT, PA66, PPE, PA, PC, ABS and PPS. 
     
     
         5 . The fan frame body structure as claimed in  claim 4 , wherein the first frame layer is adjacent to the air outlet, while the second frame layer is adjacent to the air inlet. 
     
     
         6 . A fan frame body structure comprising a fan frame, the fan frame having an air inlet and an air outlet respectively positioned on two sides of the fan frame, the fan frame body structure being characterized in that the fan frame includes:
 a first frame layer vibrating at a first vibration frequency;   a second frame layer directly overlaid or formed on the first frame layer in an axial direction of the fan frame, the second frame layer vibrating at a second vibration frequency; and   a third frame layer directly overlaid or formed on the second frame layer in the axial direction of the fan frame, the third frame layer vibrating at a third vibration frequency, the second frame layer being positioned between the first and third frame layers, the first frame layer being made of a material of a composition different from that of the second frame layer so that the first vibration frequency of the first frame layer is different from the second vibration frequency of the second frame layer, the third frame layer being made of a material of a composition different from that of the second frame layer so that the third vibration frequency of the third frame layer is different from the second vibration frequency of the second frame layer.   
     
     
         7 . The fan frame body structure as claimed in  claim 6 , wherein the material of the third frame layer is identical to or different from the material of the first frame layer so that the third vibration frequency of the third frame layer is equal to or different from the first vibration frequency of the first frame layer. 
     
     
         8 . The fan frame body structure as claimed in  claim 6 , wherein the material of the first frame layer is identical to or different from the material of the second frame layer so that the first vibration frequency of the first frame layer is equal to or different from the second vibration frequency of the second frame layer. 
     
     
         9 . The fan frame body structure as claimed in  claim 6 , wherein the material of the second frame layer is identical to or different from the material of the third frame layer so that the second vibration frequency of the second frame layer is equal to or different from the third vibration frequency of the third frame layer. 
     
     
         10 . The fan frame body structure as claimed in  claim 6 , wherein the first frame layer is made of a plastic material selected from a group consisting of PBT, PA66, PPE, PA, PC, ABS and PPS, while the second and third frame layers are made of another plastic material selected from a group consisting of PBT, PA66, PPE, PA, PC, ABS and PPS. 
     
     
         11 . The fan frame body structure as claimed in  claim 10 , wherein the first frame layer is adjacent to the air outlet, while the third frame layer is adjacent to the air inlet.