When a household gas stove is running on low heat, why is there flame on the inner burner but no flame on the outer burner?
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Home gas stoves are equipped with an inner burner and an outer burner; the inner burner usually has round holes for the flames, while the outer burner typically has slit-shaped holes for the flames. When the gas stove is burning on high, there are flames in the flame holes of both the inner and outer burners. And when the gas stove is running on low heat, only the inner burner has flames, while there are no flames in the slotted holes of the outer burner. In this case, is gas still being released from those slotted holes in the outer burner? The fire distribution plates of the inner and outer fire covers are connected; what could cause fire to be present in the inner fire cover while there is no fire in the outer one? When a gas stove is running on low heat and there are no flames in the outer burner, is there a risk of backflow?
The outer ring has high resistance, while the inner ring has low resistance. At low flow rates, the gas flows naturally from the middle; only at higher flow rates do flames appear around it. With high pipeline pressure and low external pressure, backfire will not occur. It can be analogized to a faucet.