Control method of preventing water from overflowing from detergent box in washing machine

Abstract

The invention discloses a control method of preventing water from overflowing from a detergent box in a washing machine, water inflowing stops when a condition that the change rate of a water lever is larger than a threshold value within certain time duration is detected, correcting treatment is performed and then the operation is continued. In the method, the operational process of the washing machine can be monitored in real time, automatic treatment can be performed when the change rate of the water lever is larger than the threshold value within certain time duration, so that the water detained in the detergent box can enter a tub in time to ensure the normal inflow and prevent the water from improperly overflowing from the detergent box, the normal use of users is ensured, and the quality of the washing machine is improved. In the method, the change value of the water lever can be monitored by software, a whole structure is not needed to be changed, the method is simple and easy to realize, has good generality, and remarkably improves the properties of products without addition of the hardware cost.

Description

【Technical field】 [0001] The invention relates to an operation control method of a washing machine, in particular to a control method capable of preventing water from overflowing from a detergent box in the washing machine. 【Background technique】 [0002] The washing machine detects the height of the water level in the barrel through a pressure sensor (or called: water level sensor). The pressure sensor will generate different frequency signals under different pressure conditions. The height of the water is different, and the pressure generated is different, so the higher the height is, the higher the water level is. The smaller the frequency value is, the larger it is. Under normal circumstances, water flows into the barrel smoothly, the water level gradually increases, and the frequency obtained by the pressure sensor gradually decreases. [0003] Such as figure 2 As shown, the detergent box 1 is a device for storing washing powder. After water enters from the detergent ...

AI Technical Summary

Problems solved by technology

[0003] like figure 2 As shown, the detergent box 1 is a device for storing washing powder. After water enters from the detergent box 1, it flows into the drum 3 through the joint 2. Since the drum 3 is a closed space, the air can only flow from the joint 2. It is discharged out of the drum 3, and the joint 2 is relatively narrow. Although under normal circumstances, water can enter through the joint 2, air can come out from the joint 2, and water vapor can be exchanged normally, but when foam or foreign matter makes the joint 2 When it becomes narrower, the air in the drum 3 will be discharged to the outside of the drum 3 at a slower rate, or even unable to discharge. It remains in the detergent box 1, or even overflows from the detergent box 1, and flows into the user's home, resulting in damage to the floor of the user's home or some unpredictable safety hazards

[0004] In the current washing machine design, not only does not consider the above-mentioned problem that the water is easy to flow back, but also it is impossible to detect whether the water has been stranded in the detergent box, and it has not proposed a treatment plan when the water is stranded in the detergent box. The quality of the product has had a great adverse effect, affecting the normal use of users

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