| 摘要 |
PURPOSE:To prevent lock phenemena on the rotor in the dormant machinery as well as condensation of water in the air by pivotally fitting valve plates with hole in free command of rocking on each exhaust pipe and collective pipe connecting part. CONSTITUTION:Valve plates 8c with small hole 8d are pivotally fitted on connecting parts of exhaust pipes 6, 7 and a collective pipe 10 on blowers 1, 2 to perform switch-over drive in dually parallel. After driving the blower 1, when the blower 2 is driven by change-over, part of high temperature air through an exhaust pipe 7 is flowed through a small hole 8d into the side of an exhaust pipe 6, a rotor of the blower 1 is reversely moved at a very slow speed, and then it is exhausted through an air inlet pipe 4 into the atmosphere. Thus, since residual high temperature air in the previous driving time in the blower 1 is held as it remains in high temperature condition, liquefaction of water content in the air can be prevented, and further since a rotor in the dormant machinery is turned at a very slow speed, lock phenomena of said rotor can be prevented. |
