The air pressure of the high-speed mobile phone connector of the tooth chair is high and low, and then it becomes low after restarting. What happened?

If you don't mind the noise, you can add a bypass valve to the pipeline to open a little exhaust, and exhaust while inflating. As for how big the valve should be opened, it needs to be adjusted on site. Check whether there is anything wrong with the dryer. If the pressure is still low when you hear the unloading sound of the dryer, it means there is something wrong with the pressure regulating valve of the dryer. If the inflation pressure does not go up all the time and the dryer does not exhaust, check whether there is air leakage.