For outdoor charging piles, due to complex outdoor environment, 

this is bound to bring dust, corrosive gas, moisture and other interference, so 

the cooling fan must overcome these problems: 

1.High air volume

High heat is generated during charging pile device running, so 

large air volume is very vital and it can take away more heat. 

2.High wind pressure

As the Internal components are arranged in compact structure, 

so ventilation fan with high wind pressure will improve the heat 

dissipation and blow away the heat more efficiently. 

3.Waterproof function

The charging pile are normally runs for outdoor use, it is very possible to be rained on, must do a good job of protective measures.

4.Dust-proof function

As to the roadside charging pile, there will be a lot of dust, not because of dust affect the function of the cooling fan.

5.Long service life

The high power charging pile are compact structure with precision components, which requires small vibration of cooling fan. 

And low v