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Synthetic Jet Ejector/Blower Fan Combination for Enhanced Small Form-Factor Mobile Applications

IP.com Disclosure Number: IPCOM000050016D
Publication Date: 2005-Feb-09
Document File: 2 page(s) / 100K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that combines a conventional fan/blower with a synthetic jet ejector in small mobile applications; the solution enhances thermal performance by increasing surface heat transfer coefficients.

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Synthetic Jet Ejector/Blower Fan Combination for Enhanced Small Form-Factor

Mobile

Applications

Disclosed is a method that combines a conventional fan/blower with a synthetic jet ejector in small mobile applications; the solution enhances thermal performance by increasing surface heat transfer coefficients.

Background

Current systems use a spreader plate with a thin blower. The flow rate of these systems is inadequate for a good heat transfer coefficient. Therefore, the ability to remove energy is poor (see Figure 1).

General Description

The disclosed method stacks a synthetic jet ejector on top of a small blower fan to enhance thermal performance and increase surface heat transfer coefficients (see Figure 2). The synthetic jet ejector generates pulsating pressure, and the resulting flow generates high surface heat transfer coefficients that are 50% higher than conventional air streams at comparable flow rates. However, the “net zero” flow of the synthetic jet does not allow it to carry adequate energy from the flow. To remedy this, the blower fan generates a good net flow rate and carries the energy out. The disclosed method combines the positive aspects of the synthetic jet with the blower to carry the energy removed from the surface into the flow.

Advantages

The disclosed method’s synthetic jet ejector/blower combination improves surface heat transfer, and removes energy away from the unit.

Fig. 1

Fig. 2

Disclosed anonymously