Ultrasonic cleaning system and processing system

The ultrasonic cleaning system addresses nozzle cleaning inefficiencies in high-throughput analyzers by detecting and adjusting transducer resonant frequencies, enhancing cleaning efficiency and measurement accuracy.

WO2026115790A1PCT designated stage Publication Date: 2026-06-04HITACHI HIGH TECH CORP
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HITACHI HIGH TECH CORP
Filing Date
2025-07-02
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

In high-throughput automatic analyzers, nozzles used for dispensing samples are not adequately cleaned due to insufficient time for cleaning, leading to accumulation of dirt and potential variations in dispensed volume and carry-over of previous samples, which decreases measurement accuracy.

Method used

An ultrasonic cleaning system that includes a control device with a detection unit to identify the resonant frequency of ultrasonic transducers, allowing for precise adjustment of drive frequencies to maximize cleaning efficiency and minimize liquid instability.

Benefits of technology

The system effectively cleans nozzles by ensuring transducers resonate at optimal frequencies, reducing dirt accumulation and improving measurement accuracy by stabilizing liquid behavior during cleaning.

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Abstract

A cleaning system (30) comprises: a liquid storage tank (203) in which a cleaning liquid (W) is stored; a vibrator (201) that vibrates the cleaning liquid (W) and includes a vibrator (201A) and a vibrator (201B) disposed opposing the vibrator (201A) on the side of the liquid storage tank (203) with the cleaning liquid (W) interposed therebetween; and a control device (211). The control device (211) comprises a cleaning unit (221) for cleaning a sample nozzle immersed in the cleaning liquid (W) by vibrating one vibrator (201) among the vibrators (201A, 201B), and a detection unit (222) for detecting the resonance frequency of the vibrators (201A, 201B) by vibrating the other vibrator (201) among the vibrators (201A, 201B).
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Citation Information

Patent Citations

  • Ultrasonic flowmeter

    JP2011232203A

  • Ultrasonic cleaning machine and automatic analysis device

    JP2022055622A

  • Ultrasonic cleaning machine, automatic analyzer using the same, and cleaning method of dispensing nozzle

    JP2023034566A

  • Ultrasonic cleaner and automatic analyzer using the same

    JP2024067328A