the present invention is high pressure within the power sprayer by hose to prevent it being damaged for cylinder-pressure control device for sending to a compressor for generating air 110, a liquid sprinkler and a high pressure generated by the compressed air from the compressor 110, 400 in the power sprayer 120 is installed, the cylinder 120 is connected to the liquid inlet liquid suction hose 131 is passed to receive the liquid from one side of the chemical liquid tank 10 of 130, is installed, the upper part of the high pressure air generated by the compressor (110) Save for the air chamber 121 is installed and the liquid inlet 130 of the left and right in the first and second sleeves (141,141 ) is connected to the first and second delivery port (140,140) which are each installed power sprayer In (100), the first or second sleeves (141,141 ) which is connected to a hose of the pipe 200 is extended, the connection pipe 200 is provided with the power sprayer 100 or a pressure control device in the power sprayer for selectively supplying the liquid to the sprinkler 400, 300 are provided, the pressure control device 300 in the power sprayer is being sent to the operator by operation of the remote control sprinkler 400 at distance is constant, the pressure in the hose to flow the liquid into the liquid tank, the pressure control device 300 is in the power sprayer is installed in the main body 20 of the box-like, three-way distribution valve in the connecting pipe 200, 210, the three-way control the manifold (211,212,213) of the dispensing valve 210 comprises a control device 500 for controlling the direction of liquid supply. In addition, the control device 500 It is to be securely fixed in the vertical or horizontal to the eccentric motor 510 and the motor is fixed to the shaft of the eccentric 510, the eccentric left and right operating rod 520 and the eccentric rod is fixed to the screw in the main body 20 and first and second pusher (521,522), said first and second
