Will ordinary fans with strong winds bring risks to static-sensitive products?
You should have no problem using a normal fan in a static protected area. However, there are some concerns, including:
l Airflow friction charging
l Fan components are highly charged insulators (eg: housing or blades)
l If an ionizer is used, the normal fan airflow will interfere with the ionization airflow
From ESD Handbook TR20.20 Section 2.5, "Almost all materials, including water and dirt particles in the air, can be charged." According to Section 5.5.5 "Moving gases without particles, such as from air guns, fans or heat guns If the fast air movement causes parts or dust particles to rub against each other, tribocharging can occur. A grounded conductive surface will tribocharge an insulating surface. An insulating surface can charge an unused Grounded conductors are charged and this is the greatest ESD hazard.”
If fan assemblies are insulated, they should be kept 30CM away from static sensitive items. Per ANSI/ESD S20.20 Paragraph 6.2.3.2, Protected Area Guidelines "All process-essential insulators with electrostatic fields in excess of 2,000 volts shall be kept at least 30CM from ESDS items."
With normal fans running, the static eliminator performance of all ionizers used should be checked for any performance degradation. Such as ion fan, ion air gun, ion wind snake, etc.