負壓等如什麼????是什麼原理??????
回答 (2)
2008-11-10 8:47 pm
✔ 最佳答案
It is a kind of nomenclature學術用語. Any measurement or numbers deviate from a reference point ( normally set at 0), will be named positive in one direction and negative in the opposite direction.負壓 = same 壓力 but opposite direction
push = pull in opposite direction = 負pull
真空 = nothing, no 壓
2008-11-10 10:00 am
如果係傳染病房,就會把帶病毒的空氣推出房外走廊而令經過的人有機會受感染.所以傳染病房會採用負壓空調系統,即係用抽氣扇抽病房的空氣出街.房外走廊的空氣就會因病房是處於低壓而自動走入去,帶病毒的空氣被抽出室外街道被大量空氣稀釋,危險性相對就低好多.
負壓方式也有應用在冷卻系統方面,原本正壓時會灟水的水喉,在負壓時就唔會灟水.冷郤水道不一定要絶對密封,設計的彈性就會大得多.
Ciao
負壓方式也有應用在冷卻系統方面,原本正壓時會灟水的水喉,在負壓時就唔會灟水.冷郤水道不一定要絶對密封,設計的彈性就會大得多.
Ciao
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https://hk.answers.yahoo.com/question/index?qid=20081110000051KK00086