【 Auto cooling fan 】 About the unknown in the past for you!
fan, blowpipe and skins, zui early for mandatory instruments of blast fan and blower. Ancient Egypt goldsmith was using TaoFeng shape of the mouth, the Inca sometimes with 8 ~ 12 copper pipe blowing at the same time. Later, invented the made of animal skins blast skins, sac at both ends of the separate duct and by the air inlet of the operator's manual. This humble of blast in modern times is still used in some areas. Egypt Wang Chaole 18 g ( Rekhmir, about 1450 BC) Tomb murals have been painted in a cylindrical solid drum wind device image. Into the wind, the operator rope pulling up the bag, then hit the drum charging, will wind each furnace blower unit 4, two people each operation.
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