A Complete Collection of 100000 Whys
Fav十万个为什么
为什么蒸锅要有透气孔？
简单的摘要：蒸锅要有透气孔的原因主要是为了排出多余蒸汽、防止蒸汽锁以及保持锅内压力平衡。
1、排出多余蒸汽：在蒸煮过程中，水被加热产生大量蒸汽。透气孔可以让多余的蒸汽排出，防止锅内压力过高，避免蒸汽从锅盖边缘喷出，保证使用安全。
2、防止蒸汽锁：如果没有透气孔，蒸汽可能会在锅盖和锅体之间形成蒸汽锁，导致锅盖难以打开。透气孔可以防止这种情况发生，使锅盖容易打开，方便操作。
3、保持锅内压力平衡：透气孔可以让锅内外的压力保持平衡，防止锅内压力过高导致锅盖被顶起或锅内液体溢出。同时，压力平衡也有助于保持锅内温度的稳定，使食物受热均匀。
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