The reason for the noise of the micro air pump
So why does it get louder over time? There are two main reasons,
1. The part connected to the motor crankshaft and the connecting rod is worn and there is a gap, and there will be noise. This problem can be disassembled to apply a small amount of grease lubricating oil to this part
2. The fixation between the motor and the shell may be loose, or the shock isolation glue becomes hard. If the oxygen pump works uninterrupted for a long time, it will generate heat, and the heat will accelerate the hardening of the shock isolation glue.