Resonance piezoelectric fan with cymbal-shaped cavity

Abstract

The invention relates to a resonance piezoelectric fan with a cymbal-shaped cavity. The fan comprises a piezoelectric oscillator, a supporting block, a mass block and a base, and is characterized by further comprising a cymbal-shaped cavity structure, wherein the piezoelectric oscillator is arranged on the base, and the side, in the thickness direction, of the piezoelectric oscillator is connected with the supporting block; the supporting block is connected with a first cymbal-shaped cavity element of the cymbal-shaped cavity, the first cymbal-shaped cavity element is provided with taper air inlet holes, a second cymbal-shaped cavity element is provided with flow passing holes, the second cymbal-shaped cavity element is connected with the mass block, an opening of the first cymbal-shaped cavity element and an opening of the second cymbal-shaped cavity element are oppositely arranged and connected in a sealed mode to form a cymbal-shaped pump cavity, and taper outlet holes are distributed in the positions, corresponding to the flow passing holes, of the mass block; during work, the piezoelectric oscillator vibrates under the action of alternating voltage, so that the volume of the cymbal-shaped pump cavity changes, fluids are pushed to flow in from the air inlet holes and flow out from the air outlet holes, and the resonance piezoelectric fan has the advantages of being compact in structure and large in cavity size variable quantity.

Description

technical field [0001] The invention belongs to the field of fluid transportation, and in particular relates to a resonant piezoelectric fan device with a cymbal-shaped cavity. Background technique [0002] Piezoelectric diaphragm pump is a volumetric pump driven by a piezoelectric vibrator. It has the advantages of simple structure for mass production, small size for miniaturization, digital control and long life. It is widely used in the fields of instrumentation, testing equipment and mechanical electronics. Wide application prospects. Traditional piezoelectric diaphragm pumps usually directly drive the diaphragm movement by piezoelectric ceramics, resulting in the reciprocating deformation of the diaphragm pump cavity and the cooperation with the one-way valve to form the outflow capacity, but the deformation of the piezoelectric material is small, which is the key to the improvement of the performance of the piezoelectric pump. bottleneck. Especially in terms of impro...

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Problems solved by technology

[0003] In order to solve the problem that the structure of the current resonant piezoelectric pump is complicated and difficult to miniaturize, a resonant piezoelectric fan with a cymbal-shaped cavity is proposed. The elastic element is used to form a cymbal-shaped cavity, which cooperates with the piezoelectric vibrator and the mass block to form resonance, generating a cavity. Body displacement amplification effect, in the case of small deformation of the piezoelectric vibrator, the cavity can produce a large amount of deformation, especially when the piezoelectric vibrator is required to increase the driving voltage and the thickness increases, it can still guarantee the enlarged deformation. , which can effectively solve the miniaturization problem of the current resonant piezoelectric pump

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