1, the door of the washing machine panel is not closed properly or the switch is in poor contact.

2. The starting capacitor of the washing machine is damaged.

3. The dehydration switch of the washing machine is damaged or disconnected.

4. The dehydration motor is damaged.

Automatic washing machine is to preset n programs for the whole washing process (soaking-washing-rinsing-dehydration). When washing, select one of the programs, turn on the tap and start the switch of the washing machine, and the whole washing process will be completed automatically. After washing, the buzzer will sound.

According to the invention, the water inlet, the water outlet and the on-off of the motor are controlled through the cooperation of the water level switch and the electromagnetic water inlet valve, so that automatic control is realized. The electromagnetic water inlet valve plays the role of connecting and disconnecting the water source. When the electromagnetic coil is powered off, the moving iron core is tightly pressed on the rubber diaphragm under the action of gravity and spring force, the central hole of the diaphragm is blocked, the valve is closed, and water cannot flow.

When the electromagnetic coil is energized, the moving iron core moves upward under the action of magnetic force, leaving the diaphragm and opening the central hole of the diaphragm, so the water above the diaphragm flows into the washing tub through the central hole. Because the circulation capacity of the central hole is greater than that of the holes on both sides of the diaphragm, the pressure above the diaphragm drops rapidly, and the diaphragm will move up under the action of pressure difference, and the door will be closed to release water.

The intelligent fuzzy control automatic washing machine can also automatically judge the water temperature, water level, clothes quality and clothes dirt, and decide the appropriate amount of detergent and the best washing program. When the quantity and texture of clothes in the washing bucket are different, the total weight will be different if water is injected to make them reach the same water level. Taking advantage of this, the quality and quantity of clothes can be judged by measuring the inertia of the washing motor after low-speed rotation.

The dirtiness of clothes is judged by the transparency of water. An infrared photoelectric sensor is added at the drain of the washing barrel, so that the infrared light passes through the water and enters the receiving pipe on the other side. If the transparency of the water is low, the light energy obtained by the receiving tube is small, indicating that the clothes are dirty.

Piezoelectric sensors are used for dehydration. When the dehydration barrel is highly rotated, the water sprayed from the dehydration barrel acts on the piezoelectric sensor, and the dehydration operation automatically stops according to this pressure change.