PURPOSE: To provide a liquid level control mechanism having a simple constitution and capable of controlling a liquid level in a short time.
CONSTITUTION: This liquid level control mechanism is the one for controlling the level of liquid housed in a tank, which is provided with an insoluble gas holding part 60 having a communicative port 76 communicating with the inside of the tank in the lower part thereof and for hosing liquid flowing in and out through the communicative port 76 in the lower part and for housing insoluble gas above the liquid, a level gage 62 for detecting the liquid level in the tank, inflow means 64, 66, 68 for force feeding gas into the holding part, outflow means 70, 72 for causing gas to flow out to the outside from the gas holding part, and a control means 74 for controlling the inflow means and the outflow means based on a detected value of the level gage. The gas is caused to flow into or out of the gas holding part 60 to lower or raise the liquid level in the lower part of the gas holding part, thereby the liquid level in the tank is lowered or raised. At this time, based on the detected value of the level gage, the inflow or outflow quantity of the gas flowing into or out of the gas holding part is controlled by the control means 74 so that the liquid level in the tank may attain a prescribed liquid level position.
SUGITANI TERUO
KOSHIZUKA HIROMI
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