Mini air pump for arm blood pressure monitor

What is the difference between a small AC air pump and a small DC air pump? First of all, from the working principle, the micro DC air pump uses a DC power supply, and its current direction remains unchanged during operation, which makes it have the advantages of fast start-up speed, low energy consumption, stable operation, and long life. The micro AC air pump uses an AC power supply, and its mechanical parts such as pistons or diaphragms will produce reciprocating motion due to the change of current direction during operation. This makes the AC air pump more stable at high pressure and large flow, but the energy efficiency is lower. Secondly, in terms of usage scenarios, the small dc electric pump is mainly suitable for occasions requiring higher precision and smaller air volume due to its high precision, good stability, strong controllability and low noise, such as precision measurement, instrumentation, pneumatic fixtures and other fields. The micro AC air pump is more suitable…