| 摘要: |
| VCE-15型真空预冷机在自动预冷模式下,由于受到真空室空气状态的影响,真空泵的开启存在延迟现象,导致真空预冷周期增长。以捕水器的冷负荷为基础,推导出真空泵的延迟开启时间计算式,并利用实验数据验证。结果表明:真空泵的延迟开启时间一般在5分钟之内,时间长短随着真空室空气的起始温度、相对湿度及真空室空载率的增加而增加,随着制冷机组制冷量的增加而缩短。复压时使外部空气经捕水器冷却后再进入真空室,或者提高制冷机组的制冷量,均可以缩短下次真空泵的延迟开启时间。 |
| 关键词: 热工学 真空泵 延迟开启 真空预冷 |
| DOI：10.3969/j.issn.0253-4339.年份（4位数字）.月份（2位数字）.文章的起始页码（3位数字） |
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| 基金项目:上海市重点学科建设项目(S30503)资助~~ |
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| Study on the Delayed-opening of Vacuum Pump in the Vacuum Pre-cooling Process |
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Song Xiaoyan Liu Baolin Yan Jingwen
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| (Song Xiaoyan Liu Baolin Yan Jingwen(Institute of Food Freezing Engineering,University of Shanghai for Science and Technology,Shanghai,200093,China)) |
| Abstract: |
| ince VCE-15 vacuum pre-cooling machine can be influenced by the air conditions in the vacuum chamber,the opening-time of vacuum is delayed,resulting in the prolonging of cooling period.Based on the cooling load,the computational formula for delayed-opening time was deduced,and verified by the experimental results.It is shown that,the delayed-opening time is usually less than 5 minutes,prolongs with the increase of temperature,relative humidity or no load ratio in the vacuum chamber,and shortens with the inc... |
| Key words: Pyrology Vacuum pump Delayed-opening Vacuum pre-cooling |
