Funnel-shaped valve piezoelectric pump and working method thereof

Abstract

The invention relates to a funnel-shaped valve piezoelectric pump and a working method thereof, and belongs to the field of fluid machinery. A pump body (1) is provided with an inverted conical or round table-shaped pump cavity, a central passage and a lateral passage; a valve body consists of a valve core and a central conduit connected with the valve core; the valve core is also provided with anopen valve core inner cavity, and the valve core and the central conduit are combined to integrally form into a funnel shape; the edge of the valve core and the inner wall of the pump cavity form anedge valve port; and the pump cavity is divided into a cavity A and a cavity B by the valve core, wherein the inner wall of the pump cavity and the side wall of the valve core form the cavity A, and the inner wall of the valve core, the inner wall of the pump cavity, a pump cover and a piezoelectric vibrator surround into the cavity B. The edge of a funnel-shaped valve contacts the approximate points on the conical surface of a funnel-shaped cavity, the piezoelectric vibrator vibrates to lead the volume of the pump cavity B to periodically change, and a fluid only can flow into the pump cavityB from the pump cavity A through the boundary of the funnel-shaped valve and can not reversely flow, thereby performing the function of the valve, and achieving the purpose of miniaturization, simplification and convenient installation of the piezoelectric pump.

Description

technical field [0001] The funnel-shaped valve piezoelectric pump and its working method of the present invention belong to the field of fluid machinery, and in particular relate to a passive valve piezoelectric pump. Background technique [0002] If the volumetric piezoelectric pump is classified according to whether the valve body is present, it can be divided into two types: valved and valveless piezoelectric pumps. A valve is defined as a mechanical device that creates a disconnect between the pump chamber and the suction port or discharge port during at least one point in time during the suction and discharge of the pump. At present, most piezoelectric pumps with valves use moving parts installed in the lumen of the flow tube or at the end of the flow tube to control the opening and closing of the pipeline through the moving parts, so as to realize the conduction or blocking of the fluid. [0003] figure 1 A schematic diagram of a conventional valved piezoelectric pum...

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Problems solved by technology

[0005] At present, the flow pipe valve body mechanism includes spherical valves, membrane valves, cantilever beam valves and disc valves, etc. Since these valves must be installed in the pipeline or at the end of the flow pipe, the size to be done is very small, which requires processing and processing. It is difficult to install, and there are also disadvantages such as short life, unstable operation, and easy blockage, which is not conducive to the miniaturization of piezoelectric pumps and the improvement of reliability.

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