Controller with protection device for variable frequency air conditioner

The controller comprises a protective shell, grooves are formed in the left side and the right side of the protective shell, mounting grooves are formed in the left side and the right side of the protective shell, holes are formed in the mounting grooves, fixing bolts are arranged in the mounting grooves, a protective plate is installed at the top of each mounting groove, a dark light lamp is installed on each protective plate, and a protective cover is installed on the protective shell. A groove is formed in the outer side wall of one end of the protective shell, a control groove is formed in the outer side wall, and a controller and a plurality of batteries are installed in the control groove. When the variable-frequency air conditioner control panel device is installed, the variable-frequency air conditioner control panel body is placed inside the protective shell from the back face of the protective shell, the back face of the protective shell is open, the variable-frequency air conditioner control panel