Abstract: Electric shelf is a common functional part in high-end refrigerator products, it can realize automatic adjustment of the height of the electric shelf, it is convenient for users to take and place the food materials in refrigerator. However, the planetary gear transmission inside the electric shelf will make noise when working, it will affect the sense of hearing of the user. It aims at the noise problem from the electric shelf in refrigerator, firstly, the cause of noise is identified, focuses on noise reduction optimization of the transmission. Meanwhile, reduces the vibration and noise of the transmission on the delivery path. Finally, the feasibility of the scheme is verified through testing, achieves the purpose of reducing the noise of the electric shelf.

Key words: Electric shelf, Planetary gear transmission, Noise reduction optimization, Noise testing