| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchange type ventilation device capable of continuing air supply/exhaustion while suppressing freezing of a heat exchange element, while eliminating a temperature sensor.SOLUTION: A control unit 11 stores a current value of a motor for exhaustion for outputting a predetermined air amount in a predetermined external static pressure of the motor for exhaustion at operation start time, and when the present operation current value of the motor for exhaustion becomes equal to or greater than a predetermined value, it detects that clogging inside a heat exchange element part 6 is occurring, and reduces rotational frequency of a motor for air supply. Thereby, a heat exchange type ventilation device 1 can be acquired which can continue the simultaneous operation of a blower 9 for air supply and a blower 10 for air exhaustion while preventing freezing of the heat exchange element part 6. |
