2. Loosen the impeller screw to take out the impeller, and then use a special sleeve to loosen the big nut that fixes the inner barrel (the inner barrels of Q8 18 and Q828 models are fixed with four M6 bolts), and take out the clutch of the automatic washing machine.
3. Spread a soft cloth on the floor and turn the washing machine sideways. Unscrew two bolts that fix the protective frame on the clutch of the automatic washing machine with a sleeve, and take down the protective frame.
4. Unscrew the four bolts that fix the clutch and sleeve, take off the belt, and finally take out the clutch of the automatic washing machine and replace it with a new one. Then assemble the clutch of the automatic washing machine according to the original steps.
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.
6. When we inject a certain amount of water into the washing tub, the motor will run at a low speed, and then it will be powered off quickly after it stabilizes. The washing tub will drive the motor to continue to rotate under the action of inertia. At this time, the motor winding will produce back electromotive force, and a rectangular pulse sequence will be obtained after half-wave rectification, amplification and shaping. By analyzing the pulse number and pulse width, the quality and quantity of clothes can be obtained.