An ultrasonic cleaner for cleaning the tip of a sampling nozzle by reversed phase driving of two vibrating plates (Translated)
As a method for cleaning the nozzle of clinical analyzers with high cleaning efficiency, ultrasonic cleaning was selected because the cleaning mechanism can be miniaturized and its effect on dispensing accuracy is negligible. As for nozzle cleaning, it is necessary to meet two requirements: (i) supp...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2023-11-01
|
| Series: | Mechanical Engineering Journal |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/mej/10/6/10_23-00349/_pdf/-char/en |
| _version_ | 1797387871246614528 |
|---|---|
| author | Yosuke HORIE Katsuhiko KIMURA Akihiro NOJIMA Hiroyuki TAKAYAMA Kohei NONAKA |
| author_facet | Yosuke HORIE Katsuhiko KIMURA Akihiro NOJIMA Hiroyuki TAKAYAMA Kohei NONAKA |
| author_sort | Yosuke HORIE |
| collection | DOAJ |
| description | As a method for cleaning the nozzle of clinical analyzers with high cleaning efficiency, ultrasonic cleaning was selected because the cleaning mechanism can be miniaturized and its effect on dispensing accuracy is negligible. As for nozzle cleaning, it is necessary to meet two requirements: (i) suppress the wetting range of the nozzle inserted in the chamber of the ultrasonic cleaner and (ii) generate cavitation at a depth of a few millimeters from the liquid surface. To meet those requirements, a new ultrasonic cleaner with an L-shaped cleaning head for high-efficiency cleaning of the nozzle is proposed. The cleaning head is composed of two vibration plates at its tip to concentrate the sound pressure in the cleaning area, and the shape of the head enables the vibration phase of the ultrasonic-irradiation surfaces of the plates to be reversed with a single bolt-clamped Langevin-type ultrasonic transducer (BLT). The BLT with the proposed cleaning head has three resonant frequencies: that of the BLT, fBLT, that of the lower plate, fL-P, and that of the upper plate, fU-P. At fBLT, the BLT expands and contracts in the longitudinal direction. At fL-P and fU-P, deformation of each vibration plate is large. By setting the resonance frequencies in increasing order of magnitude, i.e., fL-P, fBLT, and fU-P, it is possible to reverse the phases of the two vibration plates by driving the BLT at fBLT. It was experimentally confirmed that the sound pressure can be concentrated in the cleaning area of the cleaning head by driving the BLT at fBLT. |
| first_indexed | 2024-03-08T22:32:22Z |
| format | Article |
| id | doaj.art-72f41bfef353471c839f8fdb13c14f2a |
| institution | Directory Open Access Journal |
| issn | 2187-9745 |
| language | English |
| last_indexed | 2024-03-08T22:32:22Z |
| publishDate | 2023-11-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Mechanical Engineering Journal |
| spelling | doaj.art-72f41bfef353471c839f8fdb13c14f2a2023-12-17T23:49:53ZengThe Japan Society of Mechanical EngineersMechanical Engineering Journal2187-97452023-11-0110623-0034923-0034910.1299/mej.23-00349mejAn ultrasonic cleaner for cleaning the tip of a sampling nozzle by reversed phase driving of two vibrating plates (Translated)Yosuke HORIE0Katsuhiko KIMURA1Akihiro NOJIMA2Hiroyuki TAKAYAMA3Kohei NONAKA4Hitachi Ltd., Research & Development GroupHitachi Ltd., Research & Development GroupHitachi Ltd., Research & Development GroupHitachi High-Tech CorporationHitachi High-Tech CorporationAs a method for cleaning the nozzle of clinical analyzers with high cleaning efficiency, ultrasonic cleaning was selected because the cleaning mechanism can be miniaturized and its effect on dispensing accuracy is negligible. As for nozzle cleaning, it is necessary to meet two requirements: (i) suppress the wetting range of the nozzle inserted in the chamber of the ultrasonic cleaner and (ii) generate cavitation at a depth of a few millimeters from the liquid surface. To meet those requirements, a new ultrasonic cleaner with an L-shaped cleaning head for high-efficiency cleaning of the nozzle is proposed. The cleaning head is composed of two vibration plates at its tip to concentrate the sound pressure in the cleaning area, and the shape of the head enables the vibration phase of the ultrasonic-irradiation surfaces of the plates to be reversed with a single bolt-clamped Langevin-type ultrasonic transducer (BLT). The BLT with the proposed cleaning head has three resonant frequencies: that of the BLT, fBLT, that of the lower plate, fL-P, and that of the upper plate, fU-P. At fBLT, the BLT expands and contracts in the longitudinal direction. At fL-P and fU-P, deformation of each vibration plate is large. By setting the resonance frequencies in increasing order of magnitude, i.e., fL-P, fBLT, and fU-P, it is possible to reverse the phases of the two vibration plates by driving the BLT at fBLT. It was experimentally confirmed that the sound pressure can be concentrated in the cleaning area of the cleaning head by driving the BLT at fBLT.https://www.jstage.jst.go.jp/article/mej/10/6/10_23-00349/_pdf/-char/enultrasonic cleanerultrasonic oscillatorcleaningsampling nozzleblood analyzer |
| spellingShingle | Yosuke HORIE Katsuhiko KIMURA Akihiro NOJIMA Hiroyuki TAKAYAMA Kohei NONAKA An ultrasonic cleaner for cleaning the tip of a sampling nozzle by reversed phase driving of two vibrating plates (Translated) Mechanical Engineering Journal ultrasonic cleaner ultrasonic oscillator cleaning sampling nozzle blood analyzer |
| title | An ultrasonic cleaner for cleaning the tip of a sampling nozzle by reversed phase driving of two vibrating plates (Translated) |
| title_full | An ultrasonic cleaner for cleaning the tip of a sampling nozzle by reversed phase driving of two vibrating plates (Translated) |
| title_fullStr | An ultrasonic cleaner for cleaning the tip of a sampling nozzle by reversed phase driving of two vibrating plates (Translated) |
| title_full_unstemmed | An ultrasonic cleaner for cleaning the tip of a sampling nozzle by reversed phase driving of two vibrating plates (Translated) |
| title_short | An ultrasonic cleaner for cleaning the tip of a sampling nozzle by reversed phase driving of two vibrating plates (Translated) |
| title_sort | ultrasonic cleaner for cleaning the tip of a sampling nozzle by reversed phase driving of two vibrating plates translated |
| topic | ultrasonic cleaner ultrasonic oscillator cleaning sampling nozzle blood analyzer |
| url | https://www.jstage.jst.go.jp/article/mej/10/6/10_23-00349/_pdf/-char/en |
| work_keys_str_mv | AT yosukehorie anultrasoniccleanerforcleaningthetipofasamplingnozzlebyreversedphasedrivingoftwovibratingplatestranslated AT katsuhikokimura anultrasoniccleanerforcleaningthetipofasamplingnozzlebyreversedphasedrivingoftwovibratingplatestranslated AT akihironojima anultrasoniccleanerforcleaningthetipofasamplingnozzlebyreversedphasedrivingoftwovibratingplatestranslated AT hiroyukitakayama anultrasoniccleanerforcleaningthetipofasamplingnozzlebyreversedphasedrivingoftwovibratingplatestranslated AT koheinonaka anultrasoniccleanerforcleaningthetipofasamplingnozzlebyreversedphasedrivingoftwovibratingplatestranslated AT yosukehorie ultrasoniccleanerforcleaningthetipofasamplingnozzlebyreversedphasedrivingoftwovibratingplatestranslated AT katsuhikokimura ultrasoniccleanerforcleaningthetipofasamplingnozzlebyreversedphasedrivingoftwovibratingplatestranslated AT akihironojima ultrasoniccleanerforcleaningthetipofasamplingnozzlebyreversedphasedrivingoftwovibratingplatestranslated AT hiroyukitakayama ultrasoniccleanerforcleaningthetipofasamplingnozzlebyreversedphasedrivingoftwovibratingplatestranslated AT koheinonaka ultrasoniccleanerforcleaningthetipofasamplingnozzlebyreversedphasedrivingoftwovibratingplatestranslated |