An improved mist generating apparatus and method

B - Operations – Transporting – 05 – B

Patent

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Details

B05B 7/04 (2006.01) A62C 31/07 (2006.01)

Patent

CA 2726880

An improved apparatus for generating a mist is provided. The apparatus has at least one working fluid supply conduit (66) having an inlet in fluid communication with a supply of working fluid and an outlet in fluid communication with a first mixing chamber. The apparatus also includes a plurality of transport fluid passages (60a,60b), each of which has an inlet adapted to receive a supply of transport fluid and an outlet in fluid communication with the mixing chamber. Downstream of the mixing chamber is a nozzle (72) having an inlet (74) in fluid communication with the mixing chamber, an outlet (78), and a throat portion (76) intermediate the nozzle inlet (74) and outlet (78). The throat portion (76) of the nozzle (72) has a cross sectional area which is less than that of either the nozzle inlet (74) or the nozzle outlet (78). The provision of a plurality of transport fluid passages flowing into the mixing chamber, and the nozzle downstream of the mixing chamber, enhance the atomisation of the working fluid to generate the mist.

Linvention concerne un appareil de brumisation amélioré, qui comprend au moins une conduite d'alimentation en fluide de travail (66) munie d'une entrée en communication fluidique avec une source de fluide de travail, et d'une sortie en communication fluidique avec une chambre de mélange. L'appareil comprend également plusieurs circuits pour fluide de transport (60a, 60b) présentant chacun une entrée conçue pour recevoir un apport de fluide de transport et une sortie en communication fluidique avec la chambre de mélange. Une buse (72) située en aval de la chambre de mélange comporte une entrée (74) en communication fluidique avec la chambre de mélange, une sortie (78), et une partie étranglement (76) située entre l'entrée (74) et la sortie (78) de la buse. La partie étranglement (76) de la buse (72) présente une zone de la section transversale inférieure à celle de l'entrée (74) ou de la sortie (78) de la buse. L'installation de plusieurs circuits pour fluide de transport s'écoulant à l'intérieur de la chambre de mélange, et de la buse en aval de la chambre de mélange, améliore l'atomisation du fluide de travail en brume.

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