US 12,305,666 B2
Head mechanism and fan apparatus
Tao Yang, Zhongshan (CN); Shiqiang Cui, Zhongshan (CN); Junfeng Zeng, Zhongshan (CN); Runming Guo, Zhongshan (CN); Rihua Yu, Zhongshan (CN); Kai Huang, Zhongshan (CN); and Sijin Ye, Zhongshan (CN)
Assigned to GD MIDEA ENVIRONMENT APPLIANCES MFG CO., LTD., Zhongshan (CN)
Filed by GD MIDEA ENVIRONMENT APPLIANCES MFG CO., LTD., Zhongshan (CN)
Filed on Jun. 5, 2024, as Appl. No. 18/733,875.
Application 18/733,875 is a continuation of application No. 18/456,504, filed on Aug. 27, 2023, granted, now 12,071,957.
Claims priority of application No. 202310292718.1 (CN), filed on Mar. 23, 2023.
Prior Publication US 2024/0318663 A1, Sep. 26, 2024
Int. Cl. F04D 29/42 (2006.01); F04D 25/06 (2006.01); F04D 25/10 (2006.01); F04D 29/44 (2006.01)
CPC F04D 29/424 (2013.01) [F04D 25/0606 (2013.01); F04D 25/10 (2013.01); F04D 29/441 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A head mechanism, comprising:
a casing, a primary air inlet and an air outlet are provided on a circumferential side wall of the casing, and an auxiliary air inlet is provided on an axial wall surface of the casing; and
a centrifugal volute arranged in the casing, a centrifugal fan is arranged in the centrifugal volute, and an air duct outlet corresponding to the air outlet and an air duct inlet corresponding to the auxiliary air inlet are provided on the centrifugal volute; wherein
the primary air inlet is provided opposite the centrifugal volute, the primary air inlet is in communication with the centrifugal volute, the auxiliary air inlet is in communication with the centrifugal volute, and the centrifugal fan draws air from the primary air inlet;
a filter screen structure arranged corresponding to the primary air inlet; and
air flowing from the primary air inlet and the auxiliary air inlet flows into the centrifugal volute through the air duct inlet.