Why does the cooling fan used in the air purifier stop after a period of time?

Some customers have introduced a cooling fan to be installed in the air purifier. When the cooling fan has been working in the purifier for several hours, they found that the cooling fan has stopped running. What is the situation? According to the cooling fan manufacturer for air purifiers and ozone machines When the product is matched, the high-voltage static electricity in the product will break down the chip in the cooling fan, causing the cooling fan to fail to operate, showing that the power is not enough to rotate. For such products with high-voltage static electricity, the cooling fan manufacturer will do special treatment, shielding, and conduct the static electricity to the ground, so that the static electricity will not cause damage to the fan.