Abstract: In order to meet user needs and minimize the waiting time for users to receive water, the current large-flux (≥800G) reverse osmosis (RO) water purifier uses a larger water flow rate. But at the same time, it will cause the water purifier to be relatively loud, which will seriously affect the user's experience. The noise of the water purifier mainly comes from the noise produced by the water pump itself, the shell resonance caused by the vibration of the water pump, and the turbulence caused by the impact of the water flow in the pipeline. By adopting a new type of noise reduction scheme for the above noise sources, combined with simulation calculation and experimental analysis, the noise of the whole machine can be greatly reduced at low cost without affecting the flow rate of the water purifier.

Key words: Noise reduction, Large-flux, Reverse osmosis water purifier