| 摘要 |
An economizer, and a method for operating the same, is provided having a housing with external airflow section and an internal airflow section. The external airflow section includes one or more external flow blades mounted in an external airflow path. The external flow blades are selectively rotatable between an open position and a substantially closed position. The internal airflow section includes one or more internal flow blades mounted in an internal airflow path. The internal flow blades are selectively rotatable between an open position and a substantially closed position. Each internal flow blade includes a leading portion. The leading portion of each internal flow blade is substantially parallel to the internal airflow path when the internal flow blades are disposed in the open position. The external flow blades and the internal flow blades are linked together such that when the internal flow blades are in the open position, the external flow blades are in the substantially closed position, and when the internal flow blades are in the substantially closed position, the external flow blades are in the open position.
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