We generally think that the waterproof level of waterproof fans is divided into IP55 and IP68. The waterproof fan or waterproof motor with IP55 waterproof level only has the function of moisture resistance. The manufacturing method generally adopts three-proof paint on the outer surface of the motor, which has the ability to oxidize.

IP68 waterproof fans generally use vacuum coating or plastic sealing. The vacuum coating process is to deposit a layer of nanomaterial on the surface of the object by vapor deposition in a vacuum environment, similar to the semiconductor lithography technology. The film thickness is generally 5 to 30 microns. The coating process has the advantages of good heat dissipation and fast batch manufacturing. However, Nami materials are generally not resistant to corrosion, and the film will fall off over time, and can be used in water vapor environments. The waterproof fan sealed with epoxy resin can resist corrosion and can be impacted by water, but the manufacturing speed is slow, the heat dissipation effect of the motor is not good, and the price is generally expensive.

For products with high waterproof requirements, it is even possible to soak in water or immerse in water. The requirements for waterproof fans need to reach IPX7. Isolation, so that water cannot interfere with the motor, a more reliable method is: add glue to the PCB, seal the motor, and cannot see the motor.

This kind of waterproof fan needs a special mold to add waterproof function. The internal structure is designed to be filled with glue, and the motor plus a special mold protection cover. It also requires a special model. Doing this process is to put the waterproof fan in the water to work, and it does not affect the performance of the fan.