| 摘要 |
A ventilator includes a power supply circuit, a wireless transceiver module, a central processing unit, a telephone set, and a doorbell set. Thus, the ventilator can notify the user of presence of the incoming call during operation, so that the user can work in the kitchen without missing the incoming call from the telephone set. In addition, the ventilator can notify the user that the doorbell of the doorbell set rings during operation, so that the user can work in the kitchen without missing the doorbell rings from the doorbell set.
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