Application of Micro switches in Door Control Systems

These micro switches are mainly used in door control systems for appliances such as microwave ovens, dishwashers, and washing machines, etc. They are primarily used to detect:

whether the door lock is properly engaged; the appliance can only operate normally after confirmation of this.

To prevent the appliance from operating even when the door lock is malfunctioning, thus avoiding safety hazards.

Application in Ice Maker Compressor

In ice makers, microswitches serve as status detection and control signal input elements, participating in the compressor start/stop logic control.


When ice production reaches the set conditions (e.g., full ice, mechanism in position), the mechanical structure triggers the microswitch, which outputs an on/off signal and transmits it to the control board or control circuit.


Upon receiving the microswitch signal, the control system determines the current ice production status. When a "full ice" or abnormal state is detected, the control board cuts off the start signal to the compressor, stopping its operation.

Application in Push Rod Motors

In push rod motors, micro switches primarily control the stroke through a combination of "mechanical triggering + electrical signal cutoff or feedback."

Mechanical limit points are set at the extension and retraction ends of the push rod motor, and micro switches are installed at the corresponding positions.

When the push rod motor is running, the push rod gradually approaches the end of its stroke.

Upon reaching the set position, the push rod physically contacts and presses the actuator of the micro switch.

The output signal of the micro switch is directly connected in series in the motor power supply circuit; once triggered, the motor power is cut off, and the motor stops running.