| 摘要 |
PURPOSE: An automatic pump is provided to reduce manufacturing costs by connecting an electric field box to a case after inserting a diaphragm into a container integrally generated in the case and inserting an extension member into the diaphragm in order to reduce assembling process and the number of components. CONSTITUTION: An automatic pump comprises a case(110), a motor, an impeller, a pressure tank, and an electronic field box(120). The motor is installed in the case. The impeller is installed in the inside of the case and discharges fluid, which is drawn into the case while being rotated by the motor, to the outside of the case. The pressure tank is formed in the inside of the case. The one side of the pressure tank is connected to the inside of the case, the other side of the pressure tank is connected to the outside of the case. Inner pressure is controlled by absorbing the fluid in the inside of the case or by spouting the fluid to the inside of the case. The electric field box is connected to one side of the case in order to seal the other side of the pressure tank, and a control unit controlling the motor is installed in the electric field box.
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