To provide a gas dissolving device which can solve a problem with the deterioration of capability due to the heating of a pump for supplying a fluid to a dissolving tank, with the concurrent adaption of a means to enlarge the structure of the device near the pump.
The gas dissolving device includes the following structure in which a gas introduction ejector 17 is arranged near a connection part between the fluid suction side of the pump 3 and fluid suction piping 12 to be connected with the suction side, and further, a gas supply aperture which is located at one end part of gas introduction piping 18 whose other end part is connected with the gas introduction ejector 17, is arranged near the pump 3. In addition, the current of a gas to be sucked from the gas supply aperture begins to circulate in contact with the pump 3, following the operation of the pump 3, and the pump 3 is cooled by the gas current.
YAMAGUCHI SHIGEYUKI
ITO YOSHIYASU
TSUTSUMI KYOKO
KITAMURA HITOSHI
SHIBATA HISANORI
Next Patent: METHOD OF CONTROLLING STARTING OPERATION OF GAS DISSOLVING DEVICE