Abstract: Household soymilk machine have long been noisy, not fine crushing and other technical problems. Taking a new unmanned soymilk maker (note: unmanned soymilk machine refers to an automatic household soymilk maker that can clean itself) as an example. Through the use of TRIZ tools, analyzed the key cause of the noise that is related to the noise conduction structure of the crushing chamber. Combined with the actual situation, the project optimized the noise conduction structure of the machine and the ratio of the blade speed, reduced the peak noise of the machine from 79.9 dB to 68 dB, and reduced the particle size of soybean milk to less than 100 microns. The soymilk maker with low noise and the cell wall breaking technology improved user experience greatly.

Key words: TRIZ, Unmanned soymilk maker, Noise, Cell wall breaking