PROBLEM TO BE SOLVED: To provide a miniaturizable gas-dissolving apparatus which increases dissolving efficiency of gas.SOLUTION: A tank 52 is provided with a gas/liquid mixing tank 60 and a gas/liquid separation tank 61 demarcated by a first partitioning wall 62, the gas/liquid mixing tank is not communicated with the gas/liquid separation tank at an upper part, but communicated at a lower part. An inflow port 54 is provided in the gas/liquid mixing tank, and an outflow port 58 is provided in the gas/liquid separation tank 61. A gas circulation path 71 is provided for drawing out the gas stored in the gas/liquid separation tank and jetting the drawn-out gas into the gas/liquid mixing tank. The gas stored in the tank is mixed and dissolved into a fluid 56 flowing into the tank jetted from the inflow port, and the liquid 65 dissolved with the gas is taken out of the outflow port to the outside of the tank.COPYRIGHT: (C)2010,JPO&INPIT【課題】気体の溶解効率を高めるとともに、装置の小型化を図ることのできる気体溶解装置を提供すること。【解決手段】タンク52は、第1仕切り壁62によって区画された気液混合槽60と気液分離槽61を備え、気液混合槽と気液分離槽は、上部において連通しない一方、下部において連通し、流入口54が気液混合槽に設けられ、流出口58が気液分離槽61に設けられ、気液分離槽内に貯留している気体を引き抜き、引き抜いた気体を気液混合槽内に噴出させる気体循環経路71が設けられ、流入口から噴出してタンク内に流入する流体56にタンク内に貯留している気体を混合し、溶解させ、気体の溶解した液体65を流出口からタンクの外部に取り出す。【選択図】図1
