Roller washing machine and imbalance detection method and device for same

Abstract

The invention belongs to the technical field of washing machine detection control and provides a roller washing machine and an imbalance detection method and device for the same. When a roller rotates at constant low speed, roller rotating speed is detected and a first rotating speed fluctuating value is acquired; then when the roller constantly accelerates, a second rotating speed fluctuating value of the roller is acquired; a differential value between the first and second rotating speed fluctuating values is determined whether to be larger than a preset imbalance valve value; if the differential value is larger than the imbalance valve value, the roller is determined to be at a dynamic imbalance state; and otherwise, the roller is not at the dynamic imbalance state. Imbalance detection by a sensor can be avoided by the use of the detection method and device, so cost and detection difficulty can be reduced; and damages due to mechanical component crashes during dynamic imbalance detection upon high speed rotation of the roller can be avoided.

Description

technical field [0001] The invention belongs to the technical field of detection and control of washing machines, and in particular relates to a drum washing machine and an unbalance detection method and device thereof. Background technique [0002] In the drum washing machine, when the drum driven by the frequency conversion motor is unbalanced, the higher the speed of the frequency conversion motor, the greater the vibration and noise of the system, which will reduce the service life of the drum washing machine. The variable frequency motor has load unbalance detection function. When the load (such as drum) is found to be unbalanced, the speed can be adjusted or the unbalanced state of the load can be changed to reduce the vibration and noise of the system. [0003] The prior art provides the following two unbalance detection methods: [0004] (1) A sensor is used to detect whether the drum is balanced, but the cost of the sensor is high and it is not easy to install, whi...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a drum washing machine and its unbalance detection method and device, aiming to solve the existing problems of high cost, high detection difficulty, inability to perform dynamic unbalance detection on the drum in the low-speed operation stage and high-speed The dynamic unbalance detection during the running phase is likely to cause collision damage to the mechanical parts inside the washing machine

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