| 摘要 |
A vented cold tank is provided and partially filled with a eutectic solution. CO2 snow forming structure is provided within the interior of the tank above the level of the eutectic solution therein and liquid CO2 injection means is provided in a lower portion of the tank below the level of eutectic solution and arranged to create circulation of the eutectic solution within the tank including generally opposite horizontal and generally opposite vertical component of movement of the solution within the tank. Further, structure is provided for communicating the CO2 snow forming means and the liquid CO2 injection means with the same source of liquid CO2 under pressure.
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