Focused droplet nebulizer for evaporative light scattering...

B - Operations – Transporting – 05 – B

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B05B 9/06 (2006.01) G01N 21/47 (2006.01) G01N 30/06 (2006.01) G01N 30/74 (2006.01)

Patent

CA 2616338

A focused droplet nebulizer of the invention produces substantially uniform droplets of a predetermined size. Droplets are pushed out through a small outlet orifice by the contraction of a chamber. The droplets can be carried on a substantially non-divergent path in a drift tube. A piezo-controlled membrane micro pump acts in response to an electrical control signal to force a droplet out of the outlet orifice. The nebulizer can operate at frequencies permitting a stream of individual droplets of the predetermined size to be sent along the substantially non-divergent path in the drift tube in a preferred embodiment ELSD device.

L'invention concerne un nébuliseur focalisant, qui produit des gouttelettes sensiblement uniformes dont la taille est prédéterminée. Les gouttelettes sont poussées vers la sortie par un petit orifice d'évacuation, par contraction d'une chambre. Les gouttelettes peuvent être transportées sur un chemin sensiblement non divergent d'un tube de glissement. Une micropompe à membrane piézo-contrôlée agit en réponse à un signal de commande électrique pour forcer une gouttelette à sortir de l'orifice d'évacuation. Le nébuliseur peut fonctionner à des fréquences qui permettent d'envoyer un flux de gouttelettes individuelles de taille prédéterminée le long du chemin sensiblement non divergent du tube de glissement, dans un mode de réalisation préféré du dispositif ELSD.

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