Ultrasonic processing method and apparatus with multiple...

B - Operations – Transporting – 01 – J

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B01J 19/10 (2006.01) B01F 11/02 (2006.01) B05B 17/06 (2006.01) B08B 3/12 (2006.01) B23K 20/10 (2006.01) B29C 65/08 (2006.01)

Patent

CA 2544633

Ultrasonic processing apparatus and methods are disclosed, which includes multiple transducers of at least two different resonant frequencies supplying ultrasonic energy to a liquid filled tank containing components to be cleaned or processed ultrasonically. The transducers are arranged in equilateral triangular patterns along diagonal lines on a wall of the tank so that each transducer has an adjacent transducer of a different frequency. Alternatively, the apparatus includes one or more rod transducers having different resonant frequencies so that the apparatus provides a mixture of various frequencies of ultrasonic energy to the tank. Another aspect of the invention involves selecting transducers with different resonant frequencies that are outside an excluded subrange, and powering the transducers by a driving signal that sweeps through the resonant frequencies of the transducers and the excluded subrange.

Cette invention concerne des procédés et un dispositif de traitement ultrasonique faisant intervenir des transducteurs multiples d'au moins deux fréquences de résonances différentes qui appliquent une énergie ultrasonique à un réservoir rempli de liquide contenant des composants à nettoyer et à traiter par ultrasons. Les transducteurs sont disposés selon des motifs triangulaires le long de lignes diagonales sur la paroi du réservoir de sorte que chaque transducteur se trouve contre un transducteur de fréquence différente. En variante, le dispositif comprend un ou plusieurs transducteurs à tige ayant des fréquences de résonance différentes de sorte que ledit dispositif fournit un mélange de diverses fréquences de résonance d'énergie ultrasonique au réservoir. Dans un autre aspect de l'invention, on choisit des transducteurs à fréquences de résonance différentes situées en dehors d'une sous-plage d'exclusion et l'on alimente les transducteurs au moyen d'un signal de commande qui balaie leurs fréquences de résonance et la sous-plage d'exclusion. .

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