Dry ice cleaning spray nozzle, dry ice cleaner and secondary pollution preventing dry ice cleaning method

Abstract

The invention discloses a dry ice cleaning spray nozzle, a dry ice cleaner and a secondary pollution preventing dry ice cleaning method. The dry ice cleaning spray nozzle comprises a spray nozzle mainbody, and a gas curtain spray nozzle, wherein the spray nozzle main body is provided with a structure connecting a dry ice conveying tube and a dry ice gas flow injection channel; the gas curtain spray nozzle surrounds the periphery of the spray nozzle main body, and comprises an inner cavity which surrounds the periphery of the spray nozzle main body and a connecting hole which communicates withthe inner cavity, and is connected to a protective gas source through a protective gas tube; and the gas curtain spray nozzle defines a protective gas curtain which surrounds the periphery of dry icejet flow jetted by the spaying nozzle main body. According to the scheme adopted by the invention, the protective gas curtain formed by protective gas is arranged at the periphery of the dry ice jetflow, and a cleaning surface can be effectively isolated from outside air, so that pollutants such as impurities and water vapor are prevented from being in contact with the cleaning surface; and meanwhile, the cleaned surface is swept through the protective gas curtain, so that the cleaned surface can be dried and can be restored to the room temperature, and therefore, the problem that water vapor is condensed and fogged is solved, protection can be performed throughout the process, and the cleaning effect is guaranteed.

Description

technical field [0001] The invention relates to the field of dry ice cleaning equipment, in particular to a dry ice cleaning nozzle, a dry ice cleaning machine and a dry ice cleaning method for preventing secondary pollution. Background technique [0002] Dry ice blasting machine is a kind of washing machine, and the dry ice blasting method has been developed rapidly all over the world. [0003] The dry ice blasting system uses high-pressure air to spray the dry ice particles of the dry ice blasting machine onto the working surface to be cleaned, and uses the physical reflection of temperature difference to make different substances detach at different shrinkage speeds. When the dry ice particles at -78 degrees Celsius touch the surface of the dirt, it will produce an embrittlement explosion phenomenon, which will shrink and loosen the dirt, and then the dry ice particles will instantly gasify and expand 800 times, producing a strong peeling force, quickly removing the dirt,...

AI Technical Summary

Problems solved by technology

[0004] In the existing dry ice cleaning method, water vapor and impurities in the air will be mixed into the cleaned position. On the one hand, the impurities will cause secondary pollution to the cleaned surface. On the other hand, due to the temperature of the cleaned position Low, easy to form condensed water with water vapor in the air, especially during and after cleaning optical lenses, precision molds, and circuit components, water vapor will be generated on the surface of the product, easy to absorb dust, impurities, etc., causing secondary pollution, Affect the cleaning effect of the product

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