| 摘要 |
PURPOSE:To facilitate control of minute pressure difference by regulating the flow of gas to be circulated to the intake side of an anode discharge gas blower after being taken out from the discharge side, and thereby eliminating the pressure difference through control of the pressure of an anode. CONSTITUTION:The side of a cathode 1 subjected to larger gas flow is controlled so that the rotation number of a cathode circulation blower 32 may be controlled to have a required discharge flow to perform pressure control at the side of an anode 2 subjected to less gas flow for the purpose of eliminating pressure difference. As a result, immediate control with good responsiveness is possible even in the case of slight fluctuation in pressure. The gas flow to be discharged through an anode discharge gas blower 22 is set at or more than the level to be fed to the anode whereby the inside of system on the exit side of the anode. The flow of anode discharge gas is controlled by circulating the discharge flow of the blower partially by means of a pressure difference control valve 35, and thus the control of pressure difference is made easy. It is thus possible to eliminate the pressure difference between the poles of the cathode and anode with the anode system with a good responsiveness. |
