Multi-function synthetic jet and method of manufacturing same
First Claim
1. A synthetic jet assembly comprising:
- a synthetic jet comprising;
a body having a cavity and an opening formed therein;
an actuator element coupled to a second surface of the body to selectively cause displacement of the second surface; and
a control unit electrically coupled to the actuator element and at least two frequency inputs, the control unit configured to transmit a multi-frequency drive signal to the actuator element, the multi-frequency drive signal comprising a cooling frequency component and an acoustic frequency component superimposed on the cooling frequency component.
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Abstract
A synthetic jet assembly includes a synthetic jet having a cavity and an opening formed therein. The synthetic jet assembly also includes an actuator element coupled to a second surface of the body to selectively cause displacement of the second surface, and a control unit electrically coupled to the actuator element. The control unit is configured to transmit a multi-frequency drive signal to the actuator element, the multi-frequency drive signal comprising a cooling frequency component and an acoustic frequency component superimposed on the cooling frequency component. The cooling frequency component causes a cooling jet to eject from the opening of the body. The acoustic frequency component produces a desired audible output.
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Citations
27 Claims
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1. A synthetic jet assembly comprising:
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a synthetic jet comprising; a body having a cavity and an opening formed therein; an actuator element coupled to a second surface of the body to selectively cause displacement of the second surface; and a control unit electrically coupled to the actuator element and at least two frequency inputs, the control unit configured to transmit a multi-frequency drive signal to the actuator element, the multi-frequency drive signal comprising a cooling frequency component and an acoustic frequency component superimposed on the cooling frequency component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of manufacturing a synthetic jet assembly comprising:
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providing a synthetic jet body that encircles a volume; forming an orifice in the synthetic jet body to fluidically couple the volume to a gas outside the volume; coupling an actuator element to a flexible surface of the synthetic jet body; and electronically coupling a controller assembly to the actuator element, wherein the controller is programmed to; receive a first drive signal; receive a second drive signal; combine the first and second drive signals to form a combined drive signal comprising an inaudible frequency component and an audible frequency component; and transmit the combined drive signal to the actuator element. - View Dependent Claims (16, 17, 18, 19)
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20. An electronic apparatus comprising:
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a synthetic jet comprising; a housing having an orifice formed therein for introducing a fluid from outside the housing into a cavity of the housing and expelling a cooling jet therefrom toward an electronic component to be cooled; and a piezoelectric actuator coupled to the housing; a drive unit configured to drive the piezoelectric actuator; a control unit that receives a pair of frequency inputs, generates a multi-frequency drive signal from the pair of frequency inputs, and transmits the multi-frequency drive signal to the drive unit; and wherein the multi-frequency drive signal comprises a cooling frequency component selected to generate the cooling jet and an acoustic frequency component selected to generate an audible acoustic output. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification