Many families now have bathrooms and like to install mirrors. However, after showering, the mirrors often become fogged up, affecting their usability and requiring manual or towel wiping. But after showering, people are reluctant to touch external objects for hygiene reasons, and using a towel requires washing the towel, increasing housework and creating a very unpleasant showering experience, seriously affecting their mood.

Current technologies mainly use automatic wiping devices or fans/heaters around the mirror to remove the fog. The disadvantages are that the automatic wiping devices and equipment affect the mirror's appearance, and the dust and fog from the automatic wiping devices themselves still need to be manually removed.

The intelligent bathroom mirror defogging device is characterized by including an infrared emitter, an infrared receiver, a heating coil, a microcontroller, a rectifier diode, a step-down transformer, a fuse, and a thyristor. The infrared emitter and receiver are installed on the back of the mirror; the mirror body has no coating in the infrared-irradiated area. The infrared emitter and receiver are electrically connected to the microcontroller. The heating coil is arranged in a ring on the back of the mirror body, with one end connected to the fuse and step-down transformer, and the other end connected to the microcontroller via the thyristor. The microcontroller is connected to the power supply via the rectifier diode and step-down transformer, and is installed within the mirror body frame. Furthermore, the infrared emitter and receiver are installed on the front of the mirror. Even further, the infrared emitter and receiver are positioned in the middle of the ring formed by the two heating wires of the heating coil to prevent the fog on the mirror surface near the heating coil from being cleared first, thus allowing the microcontroller to disconnect the circuit prematurely. When in use, the device is powered on, and the microcontroller controls the infrared transmitter. If the infrared receiver can receive infrared light, it is determined that there is no obstruction on the mirror surface, i.e., no fog, and the heating wire coil circuit is disconnected. When the infrared receiver cannot receive infrared light, the microcontroller controls the thyristor to connect the heating wire coil circuit. The heating wire coil is energized and heats up to remove the fog. After the fog is removed, the infrared receiver receives infrared light and judges the intensity. Then, the microcontroller controls the thyristor to disconnect the circuit.