The motor of the two-way ventilator can be reversed and has dual functions of exhaust and intake. The exhaust and intake air are operated by a switch that is linked to the flap.
The switch is a two-circuit three-position conversion type switch, one control motor is reversed, and the other circuit controls the indicator light.
Pull the switch for the first time, the flap opens, the fan blades rotate the air clockwise; pull the switch again, the flap continues to open, the fan leaves the exhaust counterclockwise; the third pulls the switch, the flap falls off, the indoor The outside air is isolated. The control loop displays the corresponding working status by lighting the lights of different colors.