Fluid dispensing system and dual-mode, system fluid actuated...

G - Physics – 05 – D

Patent

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Details

G05D 11/03 (2006.01) G05D 11/00 (2006.01)

Patent

CA 2485390

Disclosed is a fluid dispensing system for precisely controlling mixing of a first fluid (i.e., a diluent such as water) with a s econd fluid (i.e., a concentrate) at a mixing point within the s ystem. A valve (10) is positioned in the system along the line ofsupply (501) of the second fluid upstream of the mixing point (701), such valve (10) being simultaneously actuated through applic ation of positive and/or negative pressure to allow the second fluid to flow through the valve (10). The pressure is generated fr om the first fluid to be dispensed by the system and mixed with the second, such that the termination of flow of the first fluid immediately terminates flow of the second fluid to ensure proper mixing of the two fluids in the final solution, thus preventing inadvertent leakage of the second fluid or collection of the second fluid within the flow system which may become subject to spoila ge or contamination.

L'invention concerne un système de distribution de fluide pour commander précisément le mélange d'un premier fluide (à savoir un diluant tel que l'eau) avec un deuxième fluide (à savoir un concentré) à un point de mélange du système. Une vanne (10) est disposée dans le système sur la ligne d'alimentation (501) du deuxième fluide, en amont du point de mélange (701), cette vanne (10) étant actionnée simultanément par l'application d'une pression positive et/ou négative pour faire passer le deuxième fluide par la vanne (10). La pression est générée par le premier fluide distribué par le système et mélangé au deuxième fluide, de sorte que l'arrêt du flux du premier fluide interrompt immédiatement le flux du deuxième fluide pour assurer un mélange correct des deux fluides dans la solution finale, évitant ainsi une fuite inopinée du deuxième fluide ou la récupération du deuxième fluide dans le système d'écoulement, qui peut alors être altéré ou contaminé.

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