Fan with sound-muffling box

摘要

A fan with a sound muffling box includes a box having a box inlet port and a box outlet port located on opposite sides from each other; and a double suction centrifugal fan encased in the box. The centrifugal fan includes a motor, a discharge port, an impeller, a scroll, and a casing side plate. The casing side plate has a motor-side inlet port, and an opposite-motor-side inlet port opposite to the motor-side inlet port with respect to the impeller. The discharge port is inclined with respect to the box outlet port. The fan with the sound muffling box further includes a sound insulating board disposed on the box inlet port in such a manner as to hide the opposite-motor-side inlet port and also to divide the box inlet port into plural regions when the inside of the box is viewed from the box inlet port.

主权项

1. A fan with a sound muffling box, comprising:
a box having a box inlet port and a box outlet port located on opposite sides from each other; a double-suction centrifugal fan encased in the box, the double-suction centrifugal fan including:
a motor;a discharge port inclined toward the box outlet port;an impeller to be driven by the motor;a scroll; anda casing side plate, the casing side plate having a motor-side inlet port and an opposite-to-motor-side inlet port opposite to the motor-side inlet port with respect to the impeller, and a sound insulating board disposed on the box inlet port, the sound insulating board being disposed at a position to hide a portion of the opposite-to-motor-side inlet port when an inside of the box is viewed from the box inlet port, the sound insulating board dividing the box inlet port into plural regions, wherein the sound insulating board increases in area from a near side of the motor-side inlet port toward a far side of the motor-side inlet port.