When the waterlevel drops, the main valve is composed of a floating ball switch control to open the water inlet to the water tank, automatic replenishment.
当水位下降后，主阀由浮球开关控制打开进水口向水池汪水，实现自动补水。
2
Solidified water flows into balance jar upon itself gravity. Keeping certain waterlevel in the jar through an automatic controlled discharge valve, which forms a water seal.