Patent ID: 11965902
Assignee: HITACHI HIGH-TECH CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An automatic analysis device comprising:
a reactor vessel;
a reaction disk configured to hold the reactor vessel;
a sample dispensing mechanism configured to dispense a sample into the reactor vessel;
a reagent dispensing mechanism configured to dispense a reagent into the reactor vessel;
an optical system including a light source configured to emit light into a mixture of the sample and the reagent dispensed into the reactor vessel, and a detector configured to detect the light emitted from the light source;
a washing mechanism configured to wash the reactor vessel; and
a computer,
wherein the computer is programmed to analyze the sample based on the light detected by the detector,
wherein the washing mechanism includes:
a washing liquid supply nozzle configured to supply a washing liquid to the reactor vessel after the analysis;
a washing liquid suction nozzle configured to suction the supplied washing liquid;
a washing tip-equipped washing liquid suction nozzle provided with a washing tip on a bottom end of the washing tip-equipped washing liquid suction nozzle; and
a rough suction nozzle that has a shorter length than the washing tip-equipped washing liquid suction nozzle,

wherein the washing tip includes three or more regions having different cross-sectional areas, including an upper portion, a lower portion, and an intermediate portion located between the upper portion and the lower portion, the cross-sectional area of the intermediate portion being the least among the upper portion, the lower portion, and the intermediate portion, and the cross-sectional area of the lower portion being greater than the cross-sectional area of the intermediate portion and less than the cross-sectional area of the upper portion,
wherein the computer is programmed to:
control the rough suction nozzle to suction liquid in the reactor vessel such that a portion of the liquid remains in the reactor vessel so a bottom surface of the reactor vessel is not exposed, and
after the rough suction nozzle suctions the liquid in the reactor vessel, control the washing tip-equipped washing liquid suction nozzle provided with the washing tip to suction the portion of the liquid remaining in the reactor vessel,
wherein each of the upper portion, the lower portion, and the intermediate portion of the washing tip is configured as a rectangular parallelepiped structure, and
wherein the washing liquid suction nozzle extends completely through the washing tip, and a portion of the washing liquid suction nozzle that extends completely through the washing tip has a uniform diameter.