VENTILATION DEVICE

PROBLEM TO BE SOLVED: To obtain a ventilation device capable of maintaining the indoor environment by making the stop/start timing of an air-supply blower appropriate.SOLUTION: A ventilation device of this invention comprises: a body having an air-supply channel and an exhaust air channel formed therein; a heat exchanger for performing heat exchange between an air-supply current and an exhaust air current; an air-supply blower provided in the air-supply channel; an exhaust fan provided in the exhaust air channel; a temperature detection part for detecting an ambient temperature; a revolution speed detection part for detecting the revolution speed of the exhaust fan; a storage part having a first revolution speed stored therein; and a control part for controlling the stop/start of the air-supply blower. The control part stops the air-supply blower when the ambient air is equal to a prescribed first preset temperature or lower, and the revolution speed of the exhaust fan is equal to the sum of the first revolution speed and a prescribed second revolution speed or more.SELECTED DRAWING: Figure 5 【課題】給気用送風機の停止および運転のタイミングの適切化を図り、室内環境の維持を図ることができる換気装置を得ること。【解決手段】本発明は、給気風路および排気風路が内部に形成された本体と、給気流と排気流との間で熱交換を行わせる熱交換器と、給気風路に設けられた給気用送風機と、排気風路に設けられた排気用送風機と、外気温度を検知する温度検知部と、排気用送風機の回転数を検知する回転数検知部と、第１の回転数が記憶された記憶部と、給気用送風機の運転および停止を制御する制御部と、を備える。制御部は、外気温度が予め定められた第１の設定温度以下であって、排気用送風機の回転数が第１の回転数と予め定められた第２の回転数との和以上である場合に、給気用送風機を停止させる。【選択図】図５