| 摘要 |
<p>To provide an air-conditioning apparatus capable of performing highly accurate active noise reduction. An air-conditioning apparatus 1 includes a housing in which an air inlet 3 and an air outlet 5 are formed, a blower fan 2 having an impeller 25, a heat exchanger 4, a noise detection microphone 6 that detects noise generated from the blower fan 2, a control speaker 8 that outputs a control sound which reduces the noise, a noise reduction effect detection microphone 9 that detects a noise reduction effect, and a signal processing device 10 that generates the control sound based on detection results of the noise detection microphone 6 and the noise reduction effect detection microphone 9. The noise detection microphone 6 is arranged in a cylindrical region A defined by an inscribed circle tangential to inner peripheral portions of blades of the impeller 25 in which the inscribed circle is extended in a direction of a rotation axis of the impeller 25, and is disposed on a stator blade attachment member 7 of the blower fan 2.</p> |
