| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner enabling high-accuracy active silencing without increasing the number of components of a silencer, and further without changing a mechanism of a blower fan. SOLUTION: This air conditioner 1 includes a housing having an inlet port 3 and an outlet port 5, a blower fan 2 having an impeller 25, a heat exchanger 4, a noise detection microphone 6 detecting noise from the blower fan 2, a control speaker 8 outputting control sound for reducing the noise, a silencing effect detection microphone 9 detecting a silencing effect of the control sound, and a signal processing unit 10 generating the control sound on the basis of results of the detections by the noise detection microphone 6 and the silencing effect detection microphone 9. The noise detection microphone 6 is positioned in a columnar region A formed by extending an inscribed circle tangent to the inner peripheries of blades of the impeller 25 in the direction of the rotation axis of the impeller 25, and disposed on a stationary blade mounting member 7 of the blower fan 2. COPYRIGHT: (C)2011,JPO&INPIT |
