| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquefied gas injecting device capable of effectively injecting low temperature liquified gas in a liquid state to an object to be cooled. SOLUTION: The liquefied gas injecting device includes a cylindrical heat insulating storage tank 11, a cooling tank 12 disposed in the heat insulating storage tank 11, an injection nozzle 13 provided in a bottom of the heat insulating storage tank, a needle 14 for opening and closing the injection nozzle, a seal gas injection part 15 surrounding the injection nozzle, an injection liquid nitrogen supply pipe 16 for supplying injection liquid nitrogen with a pressure exceeding the atmosphere pressure into the heat insulating storage tank, a cooling liquid nitrogen supply pipe 17 for supplying cooling liquid nitrogen in the saturated state at the atmosphere pressure or lower into the cooling tank, a nitrogen gas discharge pipe 18 for discharging the nitrogen gas vaporized in the cooling tank to the outside, a seal gas supply pipe 19 for supplying the seal gas to the seal gas injection part, and a needle driving device 20 for opening and closing the needle 14. COPYRIGHT: (C)2011,JPO&INPIT
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