Exhaust valve, supercharger and air supply system of air suspension

The exhaust valve comprises a valve seat, a valve cover and a valve plate, the valve cover is arranged on the valve seat, an exhaust hole is formed in the valve seat, the valve plate comprises a fixed part and a movable part, the fixed part is fixed between the valve seat and the valve cover, the movable part is connected with the fixed part, the movable part covers the exhaust hole, and the valve cover is arranged on the valve seat. And the movable part can be pushed by the compressed air to open the exhaust hole. According to the exhaust valve, the valve cover is used for pressing the fixing part of the valve plate, a limiting structure for limiting the valve plate does not need to be additionally arranged, and the manufacturing cost of the exhaust valve can be reduced. 一种排气阀、增压机及空气悬架的供气系统，排气阀包括阀座、阀盖和阀片，阀盖设置在阀座上，阀座上设有排气孔，阀片包括固定部和活动部，固定部固定于阀座与阀盖之间，活动部与固定部连接，活动部覆盖排气孔，活动部能在压缩空气的推动下打开排气孔。本实用新型的排气阀利用阀盖压住阀片的固定部，无需额外设置对阀片进行限位的限位结构，能够降低排气阀的制造成本。