| 摘要 |
The present invention discloses a ventilator for ventilating an indoor space by externally discharging indoor air and internally sucking outdoor air. A heat exchanger (60) for exchanging heat between indoor air and outdoor air is installed in a casing (50), passages for externally discharging indoor air and passages for internally sucking outdoor air are formed in the casing (50), and spiral fans (72, 82) are installed on the passages, respectively. Thus, outdoor air can be sucked through the passages for discharging indoor air and indoor air can be discharged through the passages for sucking outdoor air according to the rotation directions of the spiral fans (72, 82). As a result, a lot of indoor air can be discharged and a lot of outdoor air can be sucked at the same time. In addition, the ventilator can automatically discharge alien substances such as dust covered on the heat exchanger when indoor air is sucked. |
