[특허]Nebulizer and method

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IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B05B-007/04
출원번호	US-0869734 (1978-08-07)
발명자 / 주소	Erb Elisha W. (444 Main St. Fitchburg MA 01420) Resch Darrel R. (18 Campbell Ave. Leominster MA 01453)
인용정보	피인용 횟수 : 24 인용 특허 : 0

초록 ▼

Pneumatic nebulizer and method for uniformly introducing variable small amounts of flowable liquid into a gas flow to form a stable dispersion having the appearance of a natural fog and consisting essentially of microscopic liquid particles of said liquid dispersed in said gas. The nebulizer comprises a mixing element for introducing the liquid in uniformly fine amounts into the gas flow. The mixing element, which preferably is a replaceable unitary element comprises two contacting members having conforming surfaces which supportingly contact each other over a substantial portion of the surfaces of each to prevent compression therebetween. At least one shallow liquid passage is provided between the members of the mixing element said passage having an entrance in communication with a liquid supply chamber and having an exit orifice in communication with a gas passage to provide at least one stable liquid orifice for metering uniform predetermined amounts of liquid into a gas flowing through said gas passage. Said shallow liquid passage is formed between the said members by providing the surface of one or both members with at least one scratch, grind, etch, impression or the like, or by interposing a discontinuous inert coating or series of spaced shims or other means, to form at least one recess having a depth of about 0.01 inch or less to provide at least one stable, liquid passage for introducing uniform fine amounts of liquid from a liquid supply into the gas passage for admixture with the gas flowing from a gas supply.

대표청구항 ▼

A nebulizer device capable of reducing a flowable liquid to an ultrafine dispersion of liquid particles in a propellant gas, comprising a mixing element comprising two superposed members having adjacent surfaces which are supportingly-engaged by each other over a substantial portion of the adjoining surface areas of each, at least one of said members being a flexible member which is pressed into intimate surface contact with a substantial portion of the adjoining surface of the other said members, said contacting members being provided therebetween with at least one shallow passage having a depth of about 0.01 inch or less to form at least one thin liquid conduit between said contacting members, each said passage having an entrance adapted to receive a supply of flowable liquid and having a small liquid orifice which exits into a gas orifice, each said passage being adapted to permit said liquid to pass therethrough and out its liquid orifice to said gas orifice as a thin liquid stream, at least one gas orifice adapted to direct gas flowing therethrough into communication with the liquid flowing from at least one said liquid orifice whereby said flowable liquid which flows through each said thin passage and out of each said small liquid orifice is adapted to form a very thin stream of said liquid which contacts said flowing gas as said gas passes a said gas orifice to form said ultrafine dispersion. Method for reducing a flowable liquid to an ultrafine dispersion of liquid particles in a propellant gas comprising the steps of: (a) confining a flowable liquid within a chamber having an exit comprising at least one liquid passage; (b) forming said liquid passage by superposing two members having adjacent surfaces, at least one of said members being sufficiently flexible to permit it to be pressed into intimate surface contact with a substantial portion of the adjoining surface of the other member, and at least one of said contacting members being provided with means for forming between said members, when in contact, at least one shallow passage having a depth of about 0.01 inch or less; (c) pressing said members together to flex said one member into intimate surface contact with said other member so that said members supportingly engage each other over a substantial portion of the contacting surface areas of each, providing therebetween at least one shallow passage having a depth of about 0.01 inch or less which communicates with said liquid chamber and has a small exit orifice; (d) causing said liquid to pass from said liquid chamber through said passage between said members and out said small exit orifice as a continuous thin liquid stream having a thickness of less than about 0.010 inch; and (e) causing a continuous supply of gas to flow at sufficient velocity through a gas orifice which communicates with said exit orifice, and against said thin liquid stream to cause said thin stream to be reduced to said ultrafine dispersion of particles of said liquid in said gas.

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