| 摘要 |
PROBLEM TO BE SOLVED: To provide a foamed liquid continuously supplying device little in trouble and having a structure to withstand vibrations and impacts for accurately setting a set ratio of the concentration of the foamed liquid without using a complicated measuring device. SOLUTION: Electric three-way valves 24, 25 are respectively connected between a supply side of a liquid chemical pump 2, which sends liquid chemicals in a liquid chemical tank 21 to foamed liquid tanks 3A, 3B, and the tanks 3A, 3B and between a supply side of a water supply pipe and the tanks 3A, 3B. The tanks 3A, 3B are used for mixing the liquid chemicals with water by using venturi tubes 5A, 5B and are provided with liquid level controller 9A, 9B, respectively. Other electric three-way valves 26, 27 are respectively installed on the suction and delivery pipelines of a forcibly circulating/ discharging device 30 for circulating/mixing the foamed liquid in the tank 3A or 3B and discharging the foamed liquid to the outside halfway. The tanks 3A, 3B are alternately used as a tank for preparing the foamed liquid by supplying the liquid chemicals and water or a tank for discharging the prepared foamed liquid while observing the liquid levels by changing over these electric three-way valves.
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