The low temperature test chamber is different according to the cold treatment method. The equipment is dry ice treatment equipment, Freon freezer (low temperature test chamber), air turbo expansion refrigerator, open liquid nitrogen tank, liquid nitrogen cryogenic low temperature test chamber. The following is a description of the performance comparison of the cold processing methods of the above several devices:
Dry ice treatment equipment: zui low processing temperature -78 ° C; can not handle temperature; can not control the temperature drop; the workpiece is subject to large temperature difference stress; discharge waste cold coal such as alcohol or acetone; equipment structure is simple, labor intensity, process can not be adjusted.
Freon freezer (low temperature test chamber): zui low processing temperature -70 ° C; can handle temperature; can control the temperature drop; the workpiece is subject to less temperature difference stress; discharge waste cold coal freon, leakage pollution; equipment structure is complex The pipeline is easy to block, easy to leak, and has a large amount of maintenance.
Air turboexpansion refrigerator: Zui low processing temperature -130 ° C; can handle temperature; can control the cooling speed; the workpiece is subject to small temperature difference stress; no pollution to the environment; equipment structure is complex, semi-automatic control.
Open liquid nitrogen tank: Zui low processing temperature -196 ° C; can not handle temperature; can not control the temperature drop; the workpiece is subject to large temperature difference stress; no pollution to the environment; equipment structure is simple.
Liquid nitrogen cryogenic low temperature test chamber: zui low processing temperature -196 ° C; can handle temperature; can control the temperature drop; the workpiece is subjected to small temperature difference stress; no pollution to the environment; semi-automatic control of equipment structure.
This article is from Beijing Yashilin Test Equipment Co., Ltd. Reprint, please indicate the source
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