US 12,435,734 B1
Ventilation fan device
Chun-Yi Kuo, Taoyuan (TW); Wen-Chih Li, Taoyuan (TW); Chun-Wei Chen, Taoyuan (TW); and Yen-Lin Chen, Taoyuan (TW)
Assigned to DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed by DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed on Feb. 25, 2025, as Appl. No. 19/063,198.
Claims priority of application No. 202411378898.6 (CN), filed on Sep. 30, 2024.
Int. Cl. F04D 29/58 (2006.01); F04D 17/16 (2006.01); F04D 29/46 (2006.01)
CPC F04D 29/462 (2013.01) [F04D 17/16 (2013.01); F04D 29/582 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A ventilation fan device, comprising:
a casing, comprising a cover and a shell, wherein a first inlet and a first outlet are defined on the cover, a second outlet is defined on the shell, and the cover is combined with the shell;
a fan module, installed in the shell, comprising a housing and a centrifugal fan, wherein a second inlet and an air duct communicating with the second inlet are defined on the housing, the housing comprises a wing-shaped part located in the air duct, and the centrifugal fan is disposed in the housing; and
an air guide assembly, comprising a stepper motor and an air guide plate, wherein the stepper motor is disposed in the wing-shaped part, and the air guide plate is disposed in the housing and is driven by the stepper motor.