1. You can tap the handle position of the cover by hand and reset the plastic pin by vibration to open the door.

You can turn the knob to any gear. After a few seconds, you will hear the door lock, and then the door can be opened.

There is also an emergency switch in the lower right corner of the machine. Open the cover outside the drainage pump in the lower right corner and you will see a red plastic line. If the cable is pulled down vertically, you will hear a slight door lock sound, or you can open the door.

Extended data

Working principle:

The washing process of washing machine is mainly to pull dirt into the water under the mechanical action of mechanical drainage and washing and the wetting and dispersion of detergent to achieve the purpose of washing. First of all, the washing liquid filled between the blades of Apollo wheel is thrown to the barrel wall at high speed under the action of centrifugal force and rises along the barrel wall.

In the center of the impeller, because the thrown liquid forms a low pressure area, the washing liquid flow echoes around the impeller. In this way, an eddy current centered on the impeller axis is formed near the impeller. Under the action of eddy current, the clothes make a spiral rotation, are sucked into the center and then thrown to the bucket wall, and rub against the bucket wall.

Because the center of the pulsator is a low-pressure area, clothes are easily sucked near the pulsator and constantly rub against the pulsator, just like rubbing clothes manually, and dirt is forced to leave the clothes.

Secondly, when clothes are put into the washing liquid, due to the slow inertia movement, there is a speed difference between the water flow and the clothes, which makes them move relatively, and the water flow rubs against the clothes relatively, which also helps the dirt to leave the clothes. Thirdly, due to the irregular shape of the washing surge, when the rotating water hits the barrel wall, its speed and direction change, forming turbulence.

Under the action of turbulence, the clothes move irregularly and roll, and their fibers are constantly bent and twisted, and the clothes rub against each other, which increases the effective area of washing and improves the uniformity of washing.

The water level switch is actually a pressure switch. The inlet of the air chamber is connected with the air storage chamber in the washing barrel. When water is injected into the washing tub, the air storage chamber is quickly closed. As the water level rises, the water level of the air storage chamber also rises, and the pressure of the enclosed air also increases. The corrugated diaphragm 2 in the water level switch expands under pressure, pushing the ejector pin 3 to move, changing the contact point 4, and realizing automatic on/off.

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 method is as follows: after a certain amount of water is injected into the washing tub, the motor runs at a low speed, and after it stabilizes, the power is cut off quickly, and the washing tub drives the motor to continue to rotate under the inertia.

At this time, the motor winding generates back electromotive force, rectifies its half wave, amplifies and shapes it, and obtains a rectangular pulse sequence. By analyzing the pulse number and pulse width. You can get the quality and quantity of clothes.

References:

Baidu encyclopedia-automatic washing machine