Apparatus for producing fine snow particles from flow of liquid carbon dioxide

A system for producing a flow of fine snow particles includes a conduit for providing a pressurized flow of a cryogenic liquid and a nozzle coupled to the conduit, the nozzle having an outlet and an inlet pathway in communication with the conduit. An expansion member is positioned within the nozzle...

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Bibliographische Detailangaben
Hauptverfasser:	LUIS SIMAS, STEVEN MCCARTY, GEROGE RHOADES
Format:	Patent
Sprache:	eng
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL ATOMISING APPARATUS BLASTING CHEMISTRY COMBINED HEATING AND REFRIGERATION SYSTEMS COMPOUNDS THEREOF FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J HEAT PUMP SYSTEMS HEATING HUMAN NECESSITIES INORGANIC CHEMISTRY LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING METALLURGY NON-METALLIC ELEMENTS NOZZLES PERFORMING OPERATIONS PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL PRODUCING, WORKING OR HANDLING ICE REFRIGERATION OR COOLING SPRAYING APPARATUS SPRAYING OR ATOMISING IN GENERAL THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR TREATMENT, NOT COVERED BY OTHER CLASSES TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A system for producing a flow of fine snow particles includes a conduit for providing a pressurized flow of a cryogenic liquid and a nozzle coupled to the conduit, the nozzle having an outlet and an inlet pathway in communication with the conduit. An expansion member is positioned within the nozzle and covers the inlet pathway. The expansion member provides multiple fine channels for passage of the cryogenic fluid into a region of lower pressure, thereby enabling expansion of the cryogenic fluid during passage through the expansion member. In a preferred embodiment, the cryogenic fluid is carbon dioxide and the system parameters are set to enable the cryogenic fluid to enter a solid phase at or near the outlet surface of the expansion member and to exit therefrom as a fine snow particulate.