WASHING MECHANISM OF BIOCHEMICAL AUTOMATIC ANALYZER

摘要

PURPOSE:To eliminate the clogging and contamination of a solenoid valve and a flow path and to enhance the reliability of a large-sized automatic analyzer by providing a manual manifold to a tank for a vacuum buffer and allowing washing water to flow in the reverse direction of a vacuum suction flow path from the branch pipe. CONSTITUTION:The power supply of a vacuum pump 66 is cut off and a connection pipe 75 is clamped to prevent the penetration of a washing solution in the third chamber 72, a vacuum detector 67 and a pump 66 and, thereafter, a tube 76 is detached from a cock 92 to connect an outside water supply pump to the tube 76 and, when water is passed through the tube 76 in such a state that the solenoid valves 55 - 57, 60 - 63 of a vacuum flow path system are opened, washing water flows to the first and second chamber 70, 71 in a tank 90, the connection tube and solenoid valves 55 - 57, 60 - 63 of the vacuum flow path system, a sample vacuum bin 58, a washing water vacuum bin 59, manifolds 50 - 52 and a suction nozzle 54 to carry out washing and is discharged from a sample drain pipe 64, a washing drain pipe 65 and the nozzle 54. When a reaction container 53 is preliminarily detached from a reaction disc, washing water is emitted into a reaction tank and discharged from the overflow part of the reaction tank. By this method, the vacuum system can be washed and the reliability of the apparatus can be enhanced.