Ultrasonic piezoelectric pump

Abstract

Disclosed is an ultrasonic piezoelectric pump in which a piezoelectric pump is integrated with a fluid pipe without a check valve so that the structure can be simplified. The pump includes a fluid pipe having a hollow part formed therein to permit a fluid to flow from a fluid source, a piezoelectric actuator inserted into the hollow part and including a piezoelectric device and a plurality of fluid holes, a controller connected to a lead wire to apply a driving power to the piezoelectric device, and a tapered nozzle inserted into the hollow part in front of the piezoelectric actuator and tapered forward and downwardly.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a piezoelectric pump, and more particularly, to an ultrasonic piezoelectric pump in which a piezoelectric pump is integrated with a fluid pipe without a check valve so that the structure can be simplified.[0003]2. Description of the Related Art[0004]In general, since parts for small sized electronic products and medical equipment possibly malfunction or are damaged due to heat generated therein because degree of integration of transistors is improved, cooling of the electronic parts is becoming a critical issue in electronic apparatuses using small electronic parts.[0005]It is proposed a refrigerant circulation system using a piezoelectric pump, as a solution for cooling the small sized electronic components, for suctioning liquid refrigerant and for vibrating the liquid refrigerant by applying a force to the liquid refrigerant to discharge the refrigerant in a desired phase(?).[0006]FIG...

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Benefits of technology

[0011]Therefore, the present invention has been made in view of the above problems, and it is an aspect of the present invention to provide an ultrasonic piezoelectric pump in which: a piezoelectric actuator is installed at a center of a fluid pipe; a plurality of fluid-flow holes is formed around the piezoelectric actuator; and a tapered nozzle is tapered forward and downwardly in front of the piezoelectric actuator to force a fluid to be easily discharged and to have difficulty to flow backward so that a fluid can be smoothly pumped by the piezoelectric actuator without a check valve while preventing the fluid from flowing backward.

[0012]It is another aspect of the present invention to provide an ultrasonic piezoelectric pump in which a voltage applied to a piezoelectric device is adjusted to quickly deform the piezoelectric device for the fluid discharge and a frequency is adjusted to have a voltage waveform to force the piezoelectric device to be restored slowly so that a fluid can be smoothly discharged.

[0013]It is still another aspect of the present invention to provide an ultrasonic piezoelectric pump, a piezoelectric device of which is driven by ultrasonic waves to force a fluid to flow while causing flow resonance so that efficiency of heat transfer can be improved.

Problems solved by technology

In general, since parts for small sized electronic products and medical equipment possibly malfunction or are damaged due to heat generated therein because degree of integration of transistors is improved, cooling of the electronic parts is becoming a critical issue in electronic apparatuses using small electronic parts.

As such, since the conventional piezoelectric pump is provided independently from the fluid pipe 300 and the check valves 500 for preventing fluid from flowing backward are provided independently from the pump, the conventional piezoelectric pump is not suitable for minimizing electronic products and medical equipment because it is difficult to make the piezoelectric pump in a small size.

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