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Fluid feed pump, fluid circulation device, medical device and electronic device

A liquid-feeding pump and liquid technology, which is applied to the components of the pumping device for elastic fluid, mechanical equipment, liquid-variable-type machinery, etc. Problems such as decreased fluid volume efficiency and increased fluid delivery volume

Active Publication Date: 2013-03-27
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as shown by the solid line in the figure, the liquid delivery volume does not increase as soon as the driving frequency increases, and the efficiency of the liquid delivery pump at a driving frequency higher than 1 / τ decreases significantly.
The electric energy input when driving the piezoelectric element is roughly proportional to the driving frequency, so this inefficiency in the liquid delivery amount means that the loss of the electric energy input to the piezoelectric element increases

Method used

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  • Fluid feed pump, fluid circulation device, medical device and electronic device
  • Fluid feed pump, fluid circulation device, medical device and electronic device
  • Fluid feed pump, fluid circulation device, medical device and electronic device

Examples

Experimental program
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Embodiment Construction

[0072] figure 1 It is an explanatory diagram showing the structure of the liquid-feeding pump of this embodiment. As shown in the figure, the liquid delivery pump 100 of this embodiment is relative to Figure 13 The illustrated liquid delivery pump is different in that an outlet-side buffer chamber 118 is provided. That is, in the liquid delivery pump 100 of this embodiment, a part of the pump chamber 102 is formed by the diaphragm 104, the piezoelectric element 106 is accommodated in the case 108, and the inlet side buffer is provided on the upper part of the pump chamber 102 through the check valve 110. Room 112. Liquid is supplied from the inlet channel 114 to the inlet-side buffer chamber 112 . The pump chamber 102 is connected to an outlet-side buffer chamber 118 through an outlet flow path 116 , and the outlet-side buffer chamber 118 is connected to a liquid flow path 122 .

[0073] When a driving signal is applied to the piezoelectric element 106 to expand the piezo...

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PUM

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Abstract

The invention provides a fluid feed pump, a fluid circulation device, a medical device and an electronic device, capable effectively conveying liquid. A fluid is fed from an outlet channel of the fluid feed pump through an outlet buffer chamber to a fluid channel. The outlet buffer chamber is designed to have a higher compliance than a compliance of a pump chamber. The driving period of the fluid feed pump is set to a shorter period than a time constant defined by the compliance of the pump chamber and a flow resistance between an inlet of the outlet channel and an outlet of the fluid channel. This enables the fluid to be fed with high efficiency by taking advantage of the pressure oscillation occurring between the pump chamber and the outlet buffer chamber.

Description

technical field [0001] The invention relates to a liquid delivery pump for pressure delivery of liquid, a liquid circulation device, medical equipment and electronic equipment. Background technique [0002] There is known a liquid delivery pump that repeatedly increases the volume of the pump chamber to suck the liquid, then decreases the volume of the pump chamber to pressure-feed the liquid (for example, refer to Japanese Patent Laid-Open No. 2011-103930). With this liquid delivery pump, the fluid in the pump chamber is pressure-delivered whenever the volume of the pump chamber is increased and decreased. The amount of liquid sent each time is roughly equal to the volume (excluded volume) obtained by subtracting the minimum volume from the maximum volume of the pump chamber. Therefore, the liquid delivery amount of the liquid delivery pump is approximately equal to the value obtained by multiplying the number of times of increasing and decreasing the volume of the pump ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B19/20
CPCF04B49/065F04B53/1077F04B43/046
Inventor 大岛敦松崎尚洋内田和见小林明男
Owner SEIKO EPSON CORP