| 摘要 |
PROBLEM TO BE SOLVED: To easily expect a place becoming a cause of increasing a ventilating resistance by providing an exhaust tube extended from a coating booth to an inlet chamber of a heat exchanging chamber, and detecting an air volume of an exhaust fan, an air volume of the inlet chamber, and an air volume of an outlet chamber of the exchanging chamber. SOLUTION: An exhaust fan 56 is disposed on the way of an exhaust tube (exhaust duct) 57, and an exhaust air exhausted from a coating booth is supplied to an exhaust air inlet chamber 53a. The fan 56 is driven by a driver and rotated. As detectors, detectors 81, 82 and 83 for detecting an air volume of the fan 56, an air volume of the chamber 53a of a heat exchanging chamber and an air volume of an exhaust air outlet chamber 53b of the exchanging chamber to obtain the respective volumes are prepared. A control operation panel 90 has a converter for converting detected results such as a rotational speed, a driving power, a frequency, an air pressure, a wind speed or the like of the fan obtained from the detectors 81, 82 and 83 into the volumes, and measures a driving power of the driver of the fan 56.
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