The utility model is characterized in that a cold air box and a fan are arranged inside a box body, and a cold air pipe is arranged on the cold air box in which water is injected.

在冷气箱上装有冷气管并在冷气箱内注入水，当需要冷气时把冷气箱放入电冰箱冷冻室内。

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During the cold seasons, outdoor compressed air of liquid water will freeze pipeline, cause blockage or burst pipe.

在寒冷的季节中，室外压缩空气管线中的液体水会冻结，引起管道堵塞或爆裂。

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After cause analysis of the pipe deformation inside cold box, some corresponding precaution measures are proposed from the aspects of design, fabrication and operation of air separation unit.

文章详细分析了空分设备冷箱内管道变形的原因，从空分设备的设计制造和操作方面，提出了相应的防范措施。

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