Device for spraying dry ice snow

Abstract

Provided is a device for spraying dry ice snow, which effectively cleans by broadly spraying dry ice snow while suppressing the loss of used carbon dioxide gas. The device for spraying dry ice snow includes a carbon dioxide gas supply source for producing dry ice snow, a rectifying gas supply source for supplying rectifying gas that propels the dry ice snow, a dry ice snow nozzle (1), and first rectifying gas nozzles (3) positioned so as to be inclined and face each other across the dry ice snow nozzle (1). Therefore, sprayed dry ice snow is flattened through the action of the rectifying gas. Thus, conventional loss and particles caused by the impact of dry ice snow against the inner surfaces of the nozzles does not occur, and issues such as the loss of carbon dioxide gas and poor cleaning can be prevented. Therefore, effective and good-quality cleaning can be achieved while the loss of used carbon dioxide gas is suppressed.

Description

technical field [0001] The present invention relates to a dry ice and snow spraying device capable of efficiently spraying dry ice and snow to a wide spray target. Background technique [0002] Conventionally, the object to be cleaned has been cleaned by spraying microscopic dry ice formed by adiabatically expanding liquefied carbon dioxide gas with a throttling mechanism such as an orifice or a needle valve, while condensing in a thin tube, at the point of use. The above-mentioned dry ice 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 cleaning, in order to clean a wide object to be cleaned, technical proposals have been developed to spray dry ice and snow in a wide width according to the object to be cleaned (for example, the following patent documents 1 to 3) . [0004] In Patent Document 1, the front end of the spray nozzle is made flat, and it ...

AI Technical Summary

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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