| 摘要 |
A remote power unit (10) has an inlet duct (16) and an outlet duct (16) in a housing (12). The inlet and outlet ducts (16) are configured to receive and expel cooling air from the remote power unit (10). A plurality of slots (18;118) within the housing (12) each hold a printed wiring board (14). A door (20; 120) is attached to each of the slots (18; 118), and each door (20; 120) has a shape thermal memory element (26). The shape thermal memory element (26) is used to open and close the doors (20; 120) to either allow or prevent cooling airflow from passing along the printed wiring board (14;114). In this way, cooling air use is reduced to only those areas where cooling is needed. |
