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Cantilever fan

A cantilever and fan technology, applied in the field of cantilever fans, can solve the problems of performance loss, change in energy conversion properties, and increase in the high cost of laminated piezoelectric actuators.

Inactive Publication Date: 2013-06-05
艾菲德塞洛墨依公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, the precision required to manufacture matched vanes increases with the product of the number of layers and adds to the high cost of laminated piezoelectric actuators
[0006] A further disadvantage of piezoelectric materials is that their transducing properties change over time, resulting in reduced performance and losses in the dual-blade matching required to provide low-vibration cantilever fans
The transducing properties will also change over the age of the laminate bonding layer, resulting in the same loss of performance and vibration issues
[0007] The above shortcomings have made cantilever fans difficult to meet the industry's need for new and innovative fan technologies that can provide cost-effective performance and extended operating time

Method used

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Embodiment Construction

[0034] To meet industry needs and overcome the limitations of previous work, the present application discloses a cantilever fan with a novel means of blade actuation that overcomes the limitations of piezoelectric stack actuators, thereby providing a high-performance and cost-effective fan technology to Used in thermal management and other air moving applications. To further address these needs and overcome the limitations of previous work, novel actuation means enable the use of practical and reliable actuators to power cantilever fans; address fan lifetime issues; enable high flow in small fan form factors speed; enables near-sinusoidal blade motion with low noise due to high resonance quality factor ("Q") by operating at low frequencies; provides low vibration and reduces size / shape of cantilever fans factor to make it practical for electronics cooling (practical space-constrained high-power products).

[0035] figure 1 A schematic representation of the range of positions...

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Abstract

A cantilever fan including a cantilever blade that is clamped at one end. The fan includes an actuator that applies a periodic force to the blade resulting in periodic deflections of the blade.

Description

technical field Background technique [0001] The present application relates generally to fan technology for moving air, and more particularly generally to fan technology for moving air for applications in thermal management and hybrid applications. [0002] Rotating fans that move air for heat transfer applications are a ubiquitous cooling scheme in thermal management of electronics. The increase in power intensity in electronic products has placed demands on rotary fan technology to increase air flow rate, reduce size, increase operating time, reduce noise and vibration, and reduce power consumption. From this list of conflicting requirements, the biggest challenge appears to be long usage times. Emerging products such as HBLED lighting can require fans to last up to 10 years, but the bearings used in rotating fans typically last less than 3 years. [0003] Cantilever fans have the advantage of eliminating bearings, which are often the components that limit the life of a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D33/00F04D29/00F04D35/00H10N30/20H10N30/50
CPCF04D33/00F04D19/002G01P15/0922H10N30/50H10N30/2042
Inventor 蒂莫西·S·卢卡斯
Owner 艾菲德塞洛墨依公司
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