Abstract: The present disclosure provides a dual-purpose mosquito repeller for a mosquito-repellent incense tablet and a mosquito-repellent incense liquid, including: a mosquito repeller body. The mosquito repeller body includes: a mosquito-repellent incense tablet heating unit, configured to heat the mosquito-repellent incense tablet to produce a mosquito-repellent smoke; a mosquito-repellent incense liquid heating unit, configured to heat the mosquito-repellent incense liquid to produce a mosquito-repellent smoke. A level switch for switching the mosquito repeller to a different working state is disposed between the mosquito-repellent incense tablet heating unit and the mosquito-repellent incense liquid heating unit. Each level of the level switch corresponds to one working state.

Abstract: The embodiments of the present disclosure provide a rotational electric fan including a fan head and a fan holder, wherein the fan head and the fan holder are connected through a rotational structure. The rotational structure includes: a fitting structure, including a circular cover fitting groove disposed on the fan head and a circular fitting head disposed on the fan holder and cooperating with the circular cover fitting groove, so as to fit the fan head and the fan holder together; a circular spacer, fixed on a surface of the circular fitting head facing toward the fan head and being in interference contact with a surface of the circular cover fitting groove facing toward the circular fitting head, so as to support rotational movement of the fan head relative to the fan holder.