A circulation ink supply system for UV printer

The utility model relates to a UV printer field discloses a circulation ink supply system for UV printer. In this circulation ink supply system's structure, through the float switch who has differenttrigger mechanism in the inside setting respectively of twice grade of ink horn, can be with determining the operating condition who prints the shower nozzle, and the start -up supplies ink pump and motorised valve to realize that the printing confession is black when judging the printing, and it is black to start the confession of circulation ink pump realization internal recycling when judging the standby, thereby can make the ink be in the motion state all the time, the phenomenon of avoiding black water sedimentation appearing and printing the shower nozzle dry tack free, finally solve isinitial to be printed the disappearance and prints the problem that the shower nozzle blockked up. In addition, through extra configuration tee bend solenoid switching valve, air bottle and booster pump, can realize pressing b