Light diving breathing apparatus

The utility model relates to a super-light portable air diving respirator in an open type, which is mainly composed of a compressed air bottle, a high pressure valve, an air supplying adjustor, and a suction nozzle of an air box. The utility model is characterized in that one valve body is used by a first stage reducer of the air supplying adjustor and the high pressure valve, and the distance between the high pressure valve and the air supplying adjustor is shortened, so that the motion resistance is reduced. An adjusting screw is arranged in an air chamber with middling pressure intensity, so that air demand can be adjusted according to the vital capacity of an athlete. The valve body of the high pressure valve is provided with an air charging connection and is matched with a connecting head specially used for a high pressure gas bottle. The respirator is not only used for air compression, but also is used for aerating a high pressure gas bottle, which is convenient for aeration.