DRY ICE INJECTION DEVICE
To provide a dry ice injection device in which a needle valve is not blocked even when using the needle valve as an orifice for adiabatically expanding liquefied carbon dioxide gas and generating dry ice-snow.SOLUTION: A dry ice injection device comprises: a liquefied carbon dioxide gas supply path...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a dry ice injection device in which a needle valve is not blocked even when using the needle valve as an orifice for adiabatically expanding liquefied carbon dioxide gas and generating dry ice-snow.SOLUTION: A dry ice injection device comprises: a liquefied carbon dioxide gas supply path L1 for supplying liquefied carbon dioxide gas; a needle valve 4 positioned in the liquefied carbon dioxide gas supply path L1; a granulation part 3 which communicates with the liquefied carbon dioxide gas supply path L1 via the needle valve 4, and in which liquefied carbon dioxide gas adiabatically expands and generates dry ice; and an injection nozzle 2 for injecting the dry ice. A tip of the granulation part 3 is positioned in a space inside the injection nozzle 2. The needle valve 4 has: an internal space 4A; a first flow channel 4a and a second flow channel 4b which communicate with each other via the internal space 4A; a stem 4B positioned in the internal space 4A; and a tip 4C positioned at a tip of the stem 4B. The second flow channel 4b is connected to the liquefied carbon dioxide gas supply path L1, and the first flow channel 4a is connected to the granulation part 3.SELECTED DRAWING: Figure 2
【課題】液化炭酸ガスを断熱膨張させてドライアイススノーを生成するためのオリフィスとしてニードル弁を用いた場合であっても、ニードル弁が閉塞しないドライアイス噴射装置を提供する。【解決手段】液化炭酸ガスを供給する液化炭酸ガス供給経路L1と、液化炭酸ガス供給経路L1に位置するニードル弁4と、ニードル弁4を介して液化炭酸ガス供給経路L1と連通し、液化炭酸ガスが断熱膨張してドライアイスを生成する造粒部3と、ドライアイスを噴射する噴射ノズル2と、を備え、噴射ノズル2の内側の空間に造粒部3の先端が位置し、ニードル弁4は、内部空間4Aと、内部空間4Aを介して連通する第1流路4a及び第2流路4bと、内部空間4Aに位置する軸部4Bと、軸部4Bの先端に位置する先端部4Cとを有し、第2流路4bが液化炭酸ガス供給経路L1と接続され、第1流路4aが造粒部3と接続される、ドライアイス噴射装置を選択する。【選択図】図2 |
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