Micro piezoelectric type axial flow fan
An axial flow fan, piezoelectric technology, applied in the field of miniature piezoelectric axial flow fan, can solve the problems of limitation, small air volume, complex structure, etc.
Inactive Publication Date: 2014-10-15
长春隆美科技发展有限公司
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Problems solved by technology
The past piezoelectric fluid drive device, that is, the piezoelectric pump, is mainly used to transport liquid, but the effect of transporting gas is not ideal, mainly because the structure of the valved pump in the past piezoelectric pump is complex, although it can provide a large output pressure However, as a fan or cooling system, the air volume provided by it is too small, which limits its application; while the previous valveless pump structure is mainly designed for liquid, and gas and liquid have different characteristics in terms of flow resistance and flow characteristics, so in Piezoelectric fans need to solve the problem of gas delivery rate
Method used
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Embodiment Construction
[0012] refer to figure 1 and figure 2 , the miniature piezoelectric axial flow fan of the present invention is composed of a piezoelectric vibrator 1 and a base member 2, wherein:
[0013] The piezoelectric vibrator 1 is composed of a piezoelectric ceramic material sheet 11 bonded to an elastic substrate 12;
[0014] The base member 2 is a rectangular block with a small thickness, and a piezoelectric vibrator installation groove 21 is arranged on its top surface. The piezoelectric vibrator 1 is installed in the piezoelectric vibrator installation groove 21, and the piezoelectric vibrator installation groove 21 The depth of the piezoelectric vibrator is greater than the total thickness of the piezoelectric vibrator 1 and the peak value of the displacement of the piezoelectric vibrator center point; a cavity groove 22 is arranged at the bottom center of the piezoelectric vibrator mounting groove 21, and the depth of the cavity groove 22 is greater than that of the piezoelectri...
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The invention relates to a micro piezoelectric type axial flow fan comprising a piezoelectric oscillator and a base member. The base member is a rectangular block with small thickness, the top of the rectangular block is provided with a piezoelectric oscillator mounting groove, the center of the bottom of the piezoelectric oscillator mounting groove is provided with a cavity groove, and the piezoelectric oscillator is mounted in the piezoelectric oscillator mounting groove and form a sealed cavity with the cavity groove; the center of the bottom of the cavity groove is provided with a flow hole used for communicating the cavity with the outside air; two rectangular flat holes are formed in side faces of the base member on two perpendicular directions, the two rectangular flat holes are communicated with each other and with the flow hole to divide the flow hole into an inner flow hole portion and an outer flow hole portion; during operation, the piezoelectric oscillator produces reciprocating bending vibrations, the cavity volume is increased and decreased, fluid flow in and out through the flow hole, and air is absorbed through the rectangular flat holes and is exhausted through the outer flow hole. The micro piezoelectric type axial flow fan has the advantages of small size and simple structure.
Description
technical field [0001] The invention belongs to the field of fluid delivery, and in particular relates to a miniature piezoelectric axial flow fan. Background technique [0002] Piezoelectric fan is a fluid drive device driven by a piezoelectric vibrator. Its function is to provide a certain flow of gas at the axial outlet. It can be used for active cooling, gas transportation, Pneumatic drives, etc. It has the advantages of simple structure for mass production, small size for miniaturization, digital control and long life. The past piezoelectric fluid drive device, that is, the piezoelectric pump, is mainly used to transport liquid, but the effect of transporting gas is not ideal, mainly because the structure of the valved pump in the past piezoelectric pump is complex, although it can provide a large output pressure However, as a fan or cooling system, the air volume provided by it is too small, which limits its application; while the previous valveless pump structure is...
Claims
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Patent Timeline
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Inventor吴越李晓蔚岳子正田丰君
Owner长春隆美科技发展有限公司