Piezoelectric pump and electronic product

Abstract

The invention provides a piezoelectric pump and an electronic product, and relates to the technical field of piezoelectric components. The piezoelectric pump comprises a first cover plate, a piezoelectric element and a second cover plate. An air inlet hole is formed in the first cover plate, and an air outlet hole is formed in the second cover plate. The edge of the piezoelectric element is located between the first cover plate and the second cover plate, and fixed by the first cover plate and the second cover plate. The piezoelectric element comprises a piezoelectric vibrator and an annular check sheet, the piezoelectric vibrator comprises a vibration diaphragm and an annular piezoelectric, and the vibration diaphragm is attached to the edge of the annular piezoelectric. Air vents are formed in the vibration diaphragm, the annular piezoelectric is located on one side, facing the first cover plate, of the vibration diaphragm and recedes the air vents, and the annular piezoelectric is used for generating the vibration quantity after being triggered and transmitting the vibration quantity to the vibration diaphragm. The annular check sheets are arranged on one side, close to the second cover plate, of the vibration diaphragm, and cover the positions above the air vents of the vibration diaphragm in an opening and closing mode. The piezoelectric pump is simple in structure, smallin size and low in power consumption, the phenomenon that opening and closing of a valve body is hysteretic does not occur, and the pump output is large.

Description

technical field [0001] The invention relates to the technical field of piezoelectric devices, in particular to a piezoelectric pump and electronic products. Background technique [0002] The piezoelectric pump uses the inverse piezoelectric effect of the piezoelectric ceramic to deform the piezoelectric vibrator (piezoelectric ceramic sheet), and then the volume change of the pump chamber is generated by the deformation to realize the fluid output, or the piezoelectric vibrator generates fluctuations to transmit the fluid, and can The output flow is controlled according to the applied voltage or frequency, which can be widely used in small mobile devices, CPU and display cards, game console control boards, notebook computers and other ancillary products. [0003] As the current consumer electronics products are becoming more and more ultra-thin and miniaturized, but the amount of information to be processed is increasing, so heat dissipation has become an urgent problem to b...

AI Technical Summary

Problems solved by technology

However, there are some problems in these methods: the driving vibrator has a solid circular shape or a square piezoelectric ceramic sheet with a large electrode surface, so its capacitance is relatively large, which is not conducive to reducing power consumption; The one-way valve for opening and closing, because the one-way valve for passive opening and closing needs the vacuum degree or pressure in the pump chamber to reach a certain threshold to open and close, the opening and closing of the valve body has hysteresis, which hinders the movement of airflow; The flow resistance difference is generally a valveless pump, and the output pressure is small

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