The invention relates to a dual-purpose fan control device. The dual-purpose fan control device comprises an exhaust
signal trigger circuit, a fire-fighting
signal trigger circuit, an exhaust on-off
control circuit, a fire-fighting on-off
control circuit, an on-off execution circuit, an exhaust fan linkage circuit and a fire-fighting fan linkage circuit, wherein
direct current is accessed into theexhaust
signal trigger circuit, the fire-fighting signal trigger circuit, the exhaust on-off
control circuit, the fire-fighting on-off control circuit, the on-off execution circuit, the exhaust fan linkage circuit and the fire-fighting fan linkage circuit. The exhaust on-off control circuit and the fire-fighting on-off control circuit are both connected with the on-off execution circuit. The on-off execution circuit is connected with an execution mechanism of an electric valve.
Alternating current is accessed to a fan starting circuit, an exhaust feedback circuit and a fire-fighting feedbackcircuit. The fan starting circuit comprises an on-off line, a coil of a
contactor KM and a main contact of the
contactor KM, wherein the on-off line is connected with the coil of the
contactor KM, andthe main contact of the contactor KM is connected to a power distribution circuit of a dual-purpose
fan in series. By adoption of the dual-purpose fan control device, the linkage relation between theelectric valve and the dual-purpose fan is integrated and perfected; and a control circuit used for exhausting at ordinary times and a control circuit used for exhausting during fire fighting are integrated, so that control is effective, and management is clear.