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    • 7. 发明专利
    • ARTIFICIAL SNOW AND ICE FALLING DEVICE
    • JPH01179880A
    • 1989-07-17
    • JP31188
    • 1988-01-06
    • MITSUBISHI HEAVY IND LTD
    • MITSUI SHOJISAITO KAZUOMURAKAMI YOSHIHIRO
    • F25C3/04
    • PURPOSE:To obtain snow and ice, having physical properties near to natural snow, by a constitution wherein cold airflow is introduced into a space at the surrounding of an air and water nozzle, injecting fine granular liquid drips, to change them in a snow and ice growing chamber into snow and ice, thereafter, the snow and ice are discharged into atmosphere from a dispersing port. CONSTITUTION:A medium having sufficiently low vaporizing temperature such as liquefied nitrogen 5 is employed as cold heat source and air from an air tank 6 is converted into dry air by a dehumidifier 8 while control valves 7, 7' are controlled so as to obtain necessary airflow temperature 11 and cold air flow rate 12 by a mixing machine 9. The flow of cold air is streamlined by flow regulating plates 10 and is flowed into a snow and ice growing chamber 13. Then, liquid drops, sprayed from an air and water nozzle 1, ride on the flow of cold air, and deprive latent heat and sensible heat from the flow of cold air in the chamber 13, whereby the drops are changed into snow and ice in the same chamber 13. The liquid drops, which are changed into snow and ice, are combined into large grains, and thereafter, dispersed into low-temperature atmosphere through a dispersing port 16. According to such a constitution, snow and ice, having substantially spherical configuration and even grain sizes, may be obtained and the physical properties thereof may be proximated to natural snow.