CLEANING DEVICE, METHOD FOR DETECTING CLOGGING OF CLEANING NOZZLE, AND AUTOMATIC ANALYZER

摘要

A cleaning device (20) including a discharge nozzle (21a) for discharging a cleaning liquid, a suction nozzle (21b), inserted into a cleaning tank (30) or a reaction container (7a) together with the discharge nozzle, for sucking the cleaning liquid or a reaction liquid in the cleaning tank or the reaction container, and a waste container (33), connected to the suction nozzle by a pipe (31), for discarding the cleaning liquid or the reaction liquid, a method for detecting clogging of the cleaning nozzle, and an automatic analyzer. The cleaning device (20) comprises a detection unit (36) for detecting whether at least the capacitance between the suction nozzle and an electrode (32) placed in the middle of the pipe exceeds a predetermined threshold value, a determination unit for determining that the suction nozzle is clogged when the time difference between times when the capacitance exceeds the predetermined threshold value when the suction nozzle is not clogged and at the time of the determination is a predetermined time difference threshold value or more, and a control unit (45) for stopping the discharge of the cleaning liquid into the reaction container by the discharge nozzle when the determination unit determines that the suction nozzle is clogged.