Vehicle-mounted fan with alarm device

The invention provides a vehicle-mounted fan with an alarm device. The vehicle-mounted fan comprises a shell, a motor, an impeller storage battery and a solar cell panel. The motor is connected with an impeller. The motor and the impeller are arranged in the shell. A battery plug is connected with the motor through a wire. The shell is in a cylinder shape matched with the shape of a cup holder used for arranging a cup in a vehicle. The diameter of the top of the shell is larger than the diameter of the bottom of the shell. Air inlets are formed in the left side and the right side of the lower portion of the shell. An air inlet is formed in the rear side of the top of the shell. An air outlet is formed in the front side of the upper portion of the shell. The vehicle-mounted fan has the beneficial effects that power is supplied through solar energy, energy saving and environment friendliness are achieved, the size is small, the air outlet amount is large, power consumption is small, the vehicle-mounted fan can