Unverified90% confidenceDecision RuleTime unknown
厨房油烟机止逆阀优先选双层活动翻板结构，静止时两片弹簧翻板互相压合密封，比单层挡板止逆效果好，能有效防止邻居返烟窜味
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Unverified止逆阀分弹簧式和重力翻板式，公共烟道（多户共用）必须装弹簧双向止逆阀防串味串烟；独立烟道装简单翻板阀即可82% similarUnverified已装嵌入式或近吸式油烟机大多自带止逆阀，不要再串联加装外置止逆阀，双重阀门会叠加阻力严重削弱排烟能力78% similarUnverified市面主流止逆阀分三种结构：单层挡板式（阻力小密封差）、双层翻板式（平衡型最常用）、球形/浮球式（多用于地漏排水防返），厨房烟道选双层翻板式为主78% similarUnverified抽气阀选购看止逆阀设计：优先选带独立单向气阀+旋盖双重防漏的，普通拍打式气阀在搬运挤压时容易反弹进气导致回胀76% similarUnverified止逆阀密封性越好越防串味，但弹簧阻力也会略微降低排烟顺畅度；油烟机风压足够时优先密封，风压小的旧机型可选低阻力翻板阀75% similar
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