The invention discloses a three-way air pressure adjusting valve. The three-way air pressure adjusting valve comprises an air pressure
bottle, a pressure conveying
pipe, a protective cover, a first
pipe orifice, a
pressure control device, a fixed base and a second
pipe orifice; the air pressure
bottle communicates with the pressure conveying pipe; the end, far from the air pressure
bottle, of thepressure conveying pipe is connected with the
pressure control device; and the two ends of the
pressure control device communicate with the first pipe orifice and the second pipe orifice. The three-way air pressure adjusting valve has the following beneficial effects: an air pressure source in a fixed pipe is used for generating
impact force on a pressurization ball, so that the pressurization ball is stressed and operated in a pressurization cavity to enter a pressure source in an
extrusion cavity; due to sudden reduction of the inner
diameter, the pressure source is extruded and acceleratedto output through another outlet to achieve the pressurization purpose; and when the pressurization ball is stressed and operated in the pressurization cavity, the connected place of a connecting headand the pressurization cavity can be blocked to realize the air pressure accumulation and sudden increment, so that the liquid flow output change is guaranteed, meanwhile, a
high pressure source canbe stably provided to liquid, and invariable
impact force during liquid outputting is guaranteed.