公开(公告)号：US20170002836A1

公开(公告)日：2017-01-05

申请号：US15201278

申请日：2016-07-01

Applicant: Apple Inc.

Inventor： Philippe P. HERROU ,  Richard A. HERMS ,  Jesse T. DYBENKO

IPC: F04D29/66 ,  F04D29/28 ,  G06F1/20 ,  F04D17/16

Abstract: A fan includes an impeller having blades of varying chord lengths. The fan includes a fan housing surrounding the impeller. The fan housing includes a protruding region, or throat, separated from each passing blade by a clearance, or throat gap, that varies according to the chord length. During rotation of the impeller, the impeller blades rotate about a rotational axis, passing the protruding region defining a minimum radial gap to the protruding region. Due to their different chord lengths, the impeller blades pass the throat region at different throat gaps. Shorter blades are likely to have lower amplitude static pressures and lower air velocities resulting at the blade tip, and are hence likely to generate a lower amplitude acoustic pulse at the protruding region. The variety of chord lengths modulate the amplitude of the pressure to spread acoustic sound across multiple frequencies thereby reducing peak amplitude of the acoustic sound.

Abstract translation: 风扇包括具有不同弦长的叶片的叶轮。 风扇包括围绕叶轮的风扇壳体。 风扇壳体包括突出区域或喉部，其与每个通过的叶片分开，间隙或喉部间隙根据弦长度而变化。 在叶轮旋转期间，叶轮叶片围绕旋转轴线旋转，使突出区域限定出最小径向间隙到突出区域。 由于它们的弦长不同，叶轮叶片通过不同喉部间隙处的喉部区域。 更短的叶片可能具有较低的振幅静压力和较低的空气速度，导致叶片尖端，因此可能在突出区域处产生较低幅度的声脉冲。 弦长度的变化调制压力的幅度，以便在多个频率上扩展声音，从而减少声音的峰值振幅。

公开(公告)号：US20210095692A1

公开(公告)日：2021-04-01

申请号：US16792034

申请日：2020-02-14

Applicant: Apple Inc.

Inventor： Halil BERBEROGLU ,  Cheng Ping TAN ,  Arash NAGHIB LAHOUTI ,  Richard A. HERMS ,  Jesse T. DYBENKO ,  Ashkan RASOULI

IPC: F04D29/42 ,  F04D17/10

Abstract: An electronic device with a fan assembly is disclosed. The fan assembly includes an impeller and an insert separated from the impeller by a gap. The fan assembly increases airflow by rotationally driving the impeller. For a sufficient rotational speed of the impeller, the airflow reaches a level that provides a force that displaces the insert. The displacement may include movement and/or compression of the insert. As a result of the displacement, the gap between the impeller and the insert increases. The increased gap reduces the pressure and associated noise that is otherwise caused by the airflow. When the rotational speed of the impeller reduces or ceases, the insert returns to its initial position. In this manner, the fan assembly includes a self-adjusting gap that changes based on the airflow.

公开(公告)号：US20180070472A1

公开(公告)日：2018-03-08

申请号：US15682291

申请日：2017-08-21

Applicant: Apple Inc.

Inventor： Anthony J. AIELLO ,  Jonathan L. BERK ,  Karen CHENG ,  Jesse T. DYBENKO ,  Trevor EDMONDS ,  Kwonil D. FLEISCHMAN ,  Richard A. HERMS ,  Eric A. KNOPF ,  Arash NAGHIB LAHOUTI ,  Brad L. PATTON

IPC: H05K7/20 ,  G06F1/20

CPC classification number: H05K7/20145 ,  F04D17/16 ,  F04D25/0613 ,  F04D29/441 ,  G06F1/1658 ,  G06F1/1662 ,  G06F1/20 ,  G06F1/203 ,  H01L23/4006 ,  H01L23/467

Abstract: In an exemplary electronic device with a cooling fan, a fan assembly is attached to a keyboard assembly of the electronic device. The fan assembly includes an impeller at least partially inside a fan enclosure. The fan enclosure has, on a surface, an inlet opening and an external protrusion. The electronic device further includes a bottom case. The fan assembly is positioned between the keyboard assembly and the bottom case and oriented such that the inlet opening and the external protrusion face the bottom case. The external protrusion maintains a passage between the fan enclosure and the bottom case that allows air to enter the inlet opening and also resists interference between the rotating impeller and the stationary bottom case.