In the long-term printing operation of a UV inkjet printer, the high temperature of the ink will cause moisture to evaporate and reduce the fluidity, and then cause ink breakage or nozzle clogging. S&A chiller can achieve high precision temperature control to cool down the UV inkjet printer and precisely control its operating temperature. Effectively solve the problems of unstable inkjet caused by high temperature during long-term use of UV inkjet printers.