when the water pressure to pass through the main channel was increased or decreased, the main channel to suit this providing a liquid mixture injector capable of adjusting the amount of the second liquid introduced into. And has an injection port 6 for jetting water at the tip of the main channel 5 for passing water supplied from a water supply, a liquid tank 10 for containing a second liquid other than water, the main channel from the liquid tank 105 the A liquid mixing injector provided with a liquid flow path 11c for introducing a second liquid, the branch flow path 13 branched from the main channel 5 upstream from the merging portion of the liquid flow path 11c, branch flow is formed at the end of the road 13, a water tank 15 for containing water, the water tank 15 is communicated with an inner internal and liquid tank 10 and an air passage 17 to vent both provided, water flow rate of the main channel 5 and by a change in the / or hydraulic adjusting the amount of water in the water tank 15, to adjust the force to pressurize the second liquid in the liquid tank 10 to the main flow path 5 side through the air in the air channel 17.主流路を通過する水圧が増減したときに、これに合わせて主流路に導入される第二の液体の量を調整することができる液剤混合噴射器を提供する。給水設備から供給される水を通過させる主流路5の先端に水を噴出させる噴射口6を有するとともに、水以外の第二の液体を収容する液剤タンク10と、この液剤タンク10から主流路5に第二の液体を導入する液剤流路11cとを設けた液剤混合噴射器であって、液剤流路11cとの合流部より上流で主流路5から分岐する分岐流路13と、この分岐流路13の終端に形成され、水を収容する水タンク15と、この水タンク15内部および液剤タンク10内部を連通させて両者を通気させる空気流路17とを設け、主流路5の水流量及び/又は水圧の変化により水タンク15の水量を調整し、空気流路17の空気を介して液剤タンク10の第二の液体を主流路5側に加圧する力を調整する。
