An Extractor for Soldering 焊接用抽風機

[Update 2019/01/05]
A new version for blower fan was updated, thanks to the useful advice by jacquesl70.

The efficiency turn out to be pretty well with blower fan. However, as the air flow become stronger, there is a annoy noise coming from the tube. After a few tests, it seems that the unflatness of the tube made that noise. So a relatively flat tube might be a better choice.

Also, I switch to Fusion 360 from OnShape recently, so the new model was designed with F360. For further modifica