Patent ID: 11971426
Assignee: HITACHI HIGH-TECH CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. An automatic analysis device comprising:
a rotatable reaction disk on which a plurality of reaction cells, in each of which a mixed liquid including a sample and a reagent that are mixed and have been allowed to react, are disposed on a circumference;
a light source configured to radiate light onto the mixed liquid of the sample and the reagent, the mixed liquid being dispensed into the plurality of reaction cells disposed on the reaction disk;
a detector configured to detect the light radiated from the light source;
a cleaning mechanism including a plurality of cleaning nozzles configured to clean the plurality of reaction cells; and
a control unit, wherein
the control unit controls the cleaning mechanism and the reaction disk to perform:
an operation of lowering one cleaning nozzle of the plurality of cleaning nozzles in the cleaning mechanism toward a first reaction cell of the plurality of reaction cells, and the one cleaning nozzle discharging and accumulating a cleaning liquid or cleaning water into the first reaction cell,
an operation of rotating the reaction disk after the accumulation, and
an operation of, after the rotation, lowering another cleaning nozzle of the plurality of cleaning nozzles in the cleaning mechanism toward the first reaction cell without making the another cleaning nozzle draw in the cleaning liquid or cleaning water, and immersing the another cleaning nozzle in the cleaning liquid or cleaning water that is accumulated in the first reaction cell by the one cleaning nozzle,

wherein each of the plurality of cleaning nozzles includes an intake nozzle configured to draw in the cleaning liquid or cleaning water from the first reaction cell and a discharge nozzle disposed in contact with the intake nozzle and configured to discharge the cleaning liquid or cleaning water into the first reaction cell, and a lower end of the intake nozzle extends beyond a lower end of the discharge nozzle, and
the cleaning liquid is an alkaline cleaning liquid, and
wherein the control unit controls the cleaning mechanism and the reaction disk differently based on whether the alkaline cleaning liquid or the cleaning water is being discharged, such that the intake nozzle is disposed inside of the first reaction cell and in contact with a bottom surface of the first reaction cell when discharging of the alkaline cleaning liquid begins and the discharging of the alkaline cleaning liquid continues while the intake nozzle is raised away from the bottom surface until the intake nozzle reaches an overflow intake height of the first reaction cell, and the intake nozzle is disposed inside of the first reaction cell and above the bottom surface of the first reaction cell during discharging of the cleaning water and the intake nozzle is lowered into the first reaction cell and in contact with the bottom surface of the first reaction cell only after the discharging of the cleaning water has been completed.