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江南app官方链接 ip6x为什么要抽负压为什么是20mbar


2024-09-04


江南app官方链接 ,又名防尘试验箱,它在环境试验设备中,对于检测各种产品的防尘性能起着至关重要的作用。其中,在进行 IP6X 防尘等级测试时,江南app官方链接 通常会抽负压,且负压值一般为 20mbar。那么,这是为什么呢?

江南app官方链接

一、为什么江南app官方链接 IP6X 要抽负压?

1.IP6X江南app官方链接在进行测试时,需要抽负压的原因是为了模拟产品在实际使用中可能遇到的负压环境,确保产品在密封状态下的防尘性能。

2.根据GB/T 4208-2017标准,IP6X试验要求在设备正常工作周期内壳内压力低于周围大气压力。抽气速度为每小时40至60倍外壳容积,试验进行2小时;如果最大压差为2kPa(20mbar),而抽气速度低于40倍外壳容积/h,则应连续抽满80倍容积或抽满8小时后,试验才可停止。

二、为什么负压值是 20mbar?

抽负压至20mbar(即0.2个大气压)是为了确保试验箱内的压力低于外部环境,这样可以模拟产品在负压条件下的密封性能。这个压差可以确保滑石粉(通常用作测试粉尘)能够被吸入样品内部,如果样品的密封性能不足,粉尘就会进入样品内部。通过这种方式,可以评估样品的防尘性能是否达到IP6X的防护等级要求。

综上所述,关于江南app官方链接ip6x为何要抽负压和抽压为20mbar的介绍。

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