| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation device for air conditioning capable of performing ventilation with a ventilation air volume according to user's indoor environment without performing excess ventilation, by setting an air volume switching threshold value according to an arbitrarily determined set target concentration.SOLUTION: A ventilation device for air conditioning includes a carbon dioxide gas sensor 14 detecting a carbon dioxide gas concentration from indoor air, comparing the detected carbon dioxide gas concentration with an air volume switching threshold value, and transmitting the information on the result, and a control portion 20 for controlling air volumes of a blower for air supply and a blower for exhausting according to the information from the carbon dioxide gas sensor 14. The carbon dioxide gas sensor 14 determines the air volume switching threshold value lower than the set target concentration according to the set target concentration, stores the past maximum carbon dioxide gas concentration, calculating the differential value between the set target concentration and the stored maximum carbon dioxide gas concentration, and corrects the air volume switching threshold value on the basis of the differential value. |
