| 摘要 |
PROBLEM TO BE SOLVED: To straighten the passage for discharging air to the outside by providing a fan being rotated with the flow of air being discharged from an upper chamber and a passage chamber to the outside of a unit to suck the air from an engine containing chamber into a ventilation chamber thereby eliminating the need of a motor ventilation fan dedicated to the engine containing chamber. SOLUTION: The air in an upper chamber 22 heated with heat discharged from a heat exchanger 30 in the upper chamber 22 is discharged to the outside by driving motor ventilators 32, 33 disposed on the upper surface of a unit 12. A hole 34 made in a lateral panel 20 faces the motor ventilator 32 and when the motor ventilator 32 is driven to suck the air from the upper chamber 22 and to discharge it to the outside, the air in the lower chamber 24 is also sucked by the motor ventilator 32. A fan 44 disposed on a longitudinal panel 38 is rotated by the suction force of the motor ventilator 32 to discharge the air in an engine containing chamber 24B through a ventilation chamber 24A, the hole 34, the upper chamber 22 and the motor ventilator 32 to the outside of the unit.
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