| 摘要 |
PURPOSE: To provide a simultaneous supply and exhaust ventilation fan capable of preventing ventilation efficiency from being lowered by directly communicating supplied air to an exhaust hole side in the vicinity of a front grill. CONSTITUTION: There are provided in a frame 6 an air supply passage 2 including an air supply fan 7 and an exhaust passage 3 including an exhaust fan 8. A heat exchanger 9 is provided on the side of the frame 6 inside a room such that air stream passages 9a, 9b are inclined. An air supply hole 12 and an air exhaust hole 13 are provided. Further, there is provided a recess 15 between an end of the air supply hole 12 in a front grill 17 including a riser part 16 that covers the heat exchanger 9 and the riser part 16, in which recess supply air wind colliding the riser part 16 becomes spiral. |
