Fluid transportation device

Abstract

A fluid transportation device includes a valve seat, a valve cap, a valve membrane, multiple buffer chambers, a vibration film and an actuator. The valve membrane is arranged between the valve seat and the valve cap, and includes several hollow-types valve switches, which includes at least a first valve switch and a second valve switch. The multiple buffer chambers include a first buffer chamber between the valve membrane and the valve cap and a second buffer chamber between the valve membrane and the valve seat. The vibration film is separated from the valve cap when the fluid transportation device is in a non-actuation status, thereby defining a pressure cavity. The actuator is connected to the vibration film. When the actuator is driven to be subject to deformation, the vibration film connected to the actuator is transmitted to render a volume change of the pressure cavity and result in a pressure difference for moving the fluid.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a fluid transportation device, and more particularly to a fluid transportation device for use in a micro pump.BACKGROUND OF THE INVENTION[0002]Nowadays, fluid transportation devices used in many sectors such as pharmaceutical industries, computer techniques, printing industries, energy industries are developed toward miniaturization. The fluid transportation devices used in for example micro pumps, micro atomizers, printheads or industrial printers are very important components. Consequently, it is critical to improve the fluid transportation devices.[0003]FIG. 1A is a schematic cross-sectional view illustrating a micro pump in a non-actuation status. The micro pump 10 principally comprises an inlet channel 13, a micro actuator 15, a transmission device 14, a diaphragm 12, a compression chamber 111, a substrate 11 and an outlet channel 16. The compression chamber 111 is defined between the diaphragm 12 and the substrate 11...

AI Technical Summary

Benefits of technology

[0008]It is an object of the present invention to provide a fluid transportation device. A valve seat, a valve membrane, a valve cap, an actuating module and a cover plate are sequentially stacked from bottom to top, thereby assembling the fluid transportation device. The actuating module is activated to deform the vibrating film and thus the volume of the pressure cavity is changed to result in a positive or negative pressure difference. In addition, the inlet / outlet valve structures of the valve membrane are quickly opened or closed. At the moment when the volume of the pressure cavity is expanded or shrunken, suction or impulse is generated to flow the fluid. The fluid transportation device of the present invention can transport gases or liquids at excellent flow rate and output pressure. By using the fluid transportation device of the present invention, the problem of returning back the fluid during fluid transportation is avoided.

Problems solved by technology

Under this circumstance, a costly micro actuator is required.

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