Abstract: A waterproof motor stator structure includes a circuit board; a stator mounted on one face of the circuit board; a lower shell forming an open-topped annular recess for receiving the circuit board therein and having an central opening communicable with the annular recess; an upper shell fitted around an outer side of the stator; and a protective layer formed in the annular recess of the lower shell to encapsulate the circuit board and an open lower end of the upper shell, so that the lower shell and the upper shell are joined into an integral unit. With these arrangements, the stator located in between the lower and upper shells can be effectively protected against external moisture and salt spray with reduced time, labor and material costs while enabling extended service life a fan using same.

Abstract: A fan anti-corrosion structure includes a base seat, a circuit board and at least one coating unit. The base seat has a sidewall and a bearing cup. A rest face extends from the sidewall toward the bearing cup. The circuit board is fitted around the bearing cup and disposed on the rest face. A closed space is defined between the circuit board and the base seat. The coating is coated on the circuit board. The circuit board is protected from the corrosion of the moisture and the salt fog by the coating unit and the closed space. Also, the cost of the mold for forming the coating unit is saved to lower the manufacturing cost.

Abstract: A waterproof motor stator structure includes a circuit board; a stator mounted on one face of the circuit board; a lower shell forming an open-topped annular recess for receiving the circuit board therein and having an central opening communicable with the annular recess; an upper shell fitted around an outer side of the stator; and a protective layer formed in the annular recess of the lower shell to encapsulate the circuit board and an open lower end of the upper shell, so that the lower shell and the upper shell are joined into an integral unit. With these arrangements, the stator located in between the lower and upper shells can be effectively protected against external moisture and salt spray with reduced time, labor and material costs while enabling extended service life a fan using same.

Abstract: A motor protection structure includes a stator assembly, a casing and a filling material. The stator assembly is coated with a coating and fitted on one side of the casing. The casing has a receiving space for receiving a circuit board. The filling material is filled in the receiving space to enclose the circuit board. The filling material is connected to the coating to fully seal the stator assembly and the casing so as to lower manufacturing cost and shorten working time.