公开(公告)号：US20150152883A1

公开(公告)日：2015-06-04

申请号：US14559672

申请日：2014-12-03

Applicant: Apple Inc.

Inventor： Jesse T. Dybenko ,  Anthony Joseph Aiello ,  Nicholas D. Mancini ,  Jay S. Nigen ,  Arash Naghib Lahouti

IPC: F04D29/52 ,  F04D19/00

CPC classification number: F04D25/0613 ,  F04D29/162 ,  F04D29/4226

Abstract: The described embodiments relate to improving efficiency of a low-profile cooling fan. In one embodiment, an impeller of the cooling fan includes a shroud which covers a central portion of the impeller, thereby allowing a central inlet portion of the blades to have an increased fan blade height when compared to a cooling fan constrained by minimum part tolerances between the fan blades and a portion of the fan housing. In some embodiments, the impeller includes splitter blades that can improve performance of the low-profile cooling fan.

Abstract translation: 所描述的实施例涉及提高低轮廓冷却风扇的效率。 在一个实施例中，冷却风扇的叶轮包括覆盖叶轮的中心部分的护罩，从而允许叶片的中心入口部分与风扇叶片高度相比具有增加的风扇叶片高度， 风扇叶片和风扇壳体的一部分。 在一些实施例中，叶轮包括可提高低轮廓冷却风扇性能的分流叶片。

公开(公告)号：US20140301828A1

公开(公告)日：2014-10-09

申请号：US13887184

申请日：2013-05-03

Applicant: APPLE INC.

Inventor： Anthony Joseph Aiello ,  Jesse T. Dybenko ,  Richard A. Herms

IPC: F04D29/05 ,  F04D17/08

CPC classification number: F04D17/16 ,  F04D25/062 ,  F04D29/4226 ,  F04D29/441

Abstract: The described embodiments relate generally to improving performance characteristics of a low profile fan. More specifically configurations having sloped fan blade edges are disclosed. By applying a gradual slope to each of the fan blades, performance of the fan can be increased without risking contact or rubbing between the fan blades and a fan housing. In some embodiments, the sloped fan blades can be configured to prevent contact when bearings of the fan include a certain amount of tilt play.

Abstract translation: 所描述的实施例一般涉及改进低调风扇的性能特性。 更具体地，公开了具有倾斜风扇叶片边缘的构造。 通过对每个风扇叶片施加逐渐的斜坡，可以增加风扇的性能，而不会在风扇叶片和风扇壳体之间接触或摩擦的风险。 在一些实施例中，倾斜的风扇叶片可构造成防止风扇的轴承包含一定量的倾斜运动时的接触。

公开(公告)号：US20140265963A1

公开(公告)日：2014-09-18

申请号：US14205135

申请日：2014-03-11

Applicant: Apple Inc.

Inventor： Brad Lee Patton ,  Anthony Joseph Aiello ,  Jesse T. Dybenko

IPC: H02P6/20 ,  H02P6/10

CPC classification number: H02P6/20 ,  F04D25/0613 ,  H02P27/085

Abstract: A method to reduce acoustic noise in a cooling fan motor is disclosed. The method includes reducing the slew rate of a PWM (pulse width modulation) voltage waveform applied to energize a coil of the fan motor. This slew rate reduction results in lower mechanical vibrations and acoustic noise in the fan motor. In one embodiment, the slew rate reduction is performed during startup of the fan motor, when the motor is spinning slowly and there is little air flow noise. In another embodiment, the slew rate reduction is not performed during high speed operation of the fan motor, when the fan motor is spinning very fast and air flow noise masks the motor noise. In one embodiment, there is variable slew rate control depending on the speed of the fan motor.

Abstract translation: 公开了一种降低冷却风扇电机中的声音噪声的方法。 该方法包括降低施加于风扇马达的线圈通电的PWM（脉冲宽度调制）电压波形的转换速率。 该压摆率降低导致风扇电机中的机械振动和声音噪声较低。 在一个实施例中，当电动机缓慢旋转并且几乎没有气流噪声时，在风扇电动机启动期间执行转换速率降低。 在另一个实施例中，当风扇马达的高速运转期间，当风扇马达转速非常快并且空气流动噪声掩盖电机噪声时，不进行压摆率降低。 在一个实施例中，根据风扇电动机的速度存在可变的转换速率控制。