Mechanical energy accumulating constant pressure automatic sprayer

The utility model relates to a mechanical energy accumulating constant pressure automatic sprayer. The utility model is composed of two compact cylindrical pressure vessels, wherein, one is a liquid medicine chamber, and the other is an air accumulating chamber. The top of the liquid medicine chamber is provided with a feed nozzle, a liquid medicine conveying pipe, an operation switch and a sprayer head. The top of the air accumulating chamber is provided with an air inlet valve. The liquid medicine chamber is connected with a fluid passage of the air accumulating chamber by a communicating pipe, and a pressure limiter and an air circuit switch. The sprayer can carry out constant pressure automatic spray operation by pressurized gas energy accumulated by itself.