Device for spraying dry ice snow

Abstract

A carbon dioxide snow ejecting device is provided to achieve efficient cleaning by widely ejecting carbon dioxide snow while suppressing consumption loss of carbon dioxide gas. The device includes a carbon dioxide gas supply source for generating carbon dioxide snow, a straightened-flow gas supply source for supplying straightened-flow gas for propelling the carbon dioxide snow, a carbon dioxide snow ejection port 1, and first straightened-flow gas discharge ports 3 incliningly opposing to each other so that the carbon dioxide snow ejection port 1 is located therebetween. The device forms the ejected carbon dioxide snow in a flat shape by the effects of the straightened-flow gas. Thus, unlike conventional techniques, neither loss nor generation of particles will not be caused by the carbon dioxide snow collides the internal surface of a nozzle. Therefore, it is able to prevent situations where loss of carbon dioxide gas and poor cleaning.

Description

Technical field [0001] The present invention relates to a dry ice and snow spray device capable of efficiently spraying dry ice and snow to a spraying target with a wide width. Background technique [0002] Conventionally, the following operations have been performed: the fine dry ice produced by thermally insulating and expanding liquefied carbon dioxide gas with a throttling mechanism such as an orifice and a needle valve is sprayed at the point of use while condensing in the capillary tube to clean the object to be cleaned. The above-mentioned dry ice and snow cleaning uses high-purity liquefied carbon dioxide gas as a raw material gas, so it can be used in the field of electronics. [0003] In the above-mentioned dry ice and snow washing, in order to wash objects with a wide width, a technical solution of spraying dry ice and snow with a wide width in combination with the objects to be cleaned has been developed (for example, the following Patent Documents 1 to 3) . [0004] In...

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Problems solved by technology

[0014] However, with the injection nozzles of Patent Documents 1 and 2, when dry ice and snow are injected, a part of the dry ice and snow collides with the inner surface of the nozzle, causing a problem of loss due to sublimation of the dry ice and snow.

When the dry ice is lost, the cleaning efficiency relative to the consumption of carbon dioxide gas decreases, and there is a problem that carbon dioxide gas is consumed unnecessarily

In addition, there is a problem that a part of the dry ice and snow collides with the nozzle to generate particles, and the particles are mixed with the dry ice and snow and sprayed, so there is also a problem that good cleaning cannot be achieved.

On the other hand, in the method of Patent Document 3, although it is possible to clean a wide object to be cleaned in a short time, as the number of spray nozzles increases, the consumption of carbon dioxide gas increases, and there is a relative consumption of carbon dioxide gas. The problem of poor cleaning efficiency of the amount

In addition, in a device using a nozzle with a standard double-pipe structure, the cleaning width is about 2 to 10 mm, and it is difficult to achieve efficient cleaning for a wider object to be cleaned.

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