Energy-saving frequency conversion controller

The utility model discloses an energy-saving frequency conversion controller which comprises an outer cabinet, frequency conversion equipment is arranged in the outer cabinet, ventilation openings are formed in the two sides of the outer cabinet, an exhaust hood is arranged on the top of the outer cabinet, an exhaust fan is arranged on the exhaust hood, and a fan power source is arranged on the exhaust fan. The frequency conversion device is provided with a power monitoring device, and a timer is installed in the outer cabinet. When in use, the exhaust fan is started and stopped according to the working state and the working power of the frequency conversion equipment, heat dissipation is carried out in the outer cabinet to avoid heat accumulation before high-power operation, and when the frequency conversion equipment stops operating or operates at low power, the exhaust fan is in a closed state to effectively save energy; the temperature in the outer cabinet is monitored through the heat-sensitive sensor, t