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Piezoelectric Pump and Stirling Refrigerator/Freezer

a technology of stirring refrigerators and pumps, applied in the direction of positive displacement liquid engines, cooling devices, lighting and heating devices, etc., can solve the problem of inefficient operation of the stirring pump 106

Inactive Publication Date: 2008-05-01
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0034]The present invention can thus provide a piezoelectric pump that can be used in a sealed system of negative and positive pressure states for a long period of time without causing slow leakage.

Problems solved by technology

Consequently, piezoelectric pump 106 operates inefficiently.

Method used

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  • Piezoelectric Pump and Stirling Refrigerator/Freezer
  • Piezoelectric Pump and Stirling Refrigerator/Freezer
  • Piezoelectric Pump and Stirling Refrigerator/Freezer

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0051]FIG. 2 is a cross section of a piezoelectric pump in a first embodiment.

[0052]The present embodiment provides a piezoelectric pump 6 including a casing 32 formed of a plurality of metallic members welded together, a piezoelectric element 36 dividing an internal space of casing 32 into a working space 34 (or a first internal space) and a back pressure space 35 (or a second internal space), and non-metallic, internal component 33A and 33B (or first and second internal components) provided between casing 32 and piezoelectric element 36 and holding piezoelectric element 36.

[0053]Internal components 33A and 33B are formed of workable and moldable resin. Internal component 33A defines a perimeter of working space 34 (or a pump chamber) and internal component 33B defines a perimeter of back pressure space 35. Internal components 33A and 33B are arranged opposite to each other to form a recess therebetween to receive and thus hold piezoelectric element 36 therein. In other words, inte...

second embodiment

[0062]FIG. 3 is a cross section of a piezoelectric pump in a second embodiment.

[0063]Piezoelectric pump 6 in the present embodiment is an exemplary variation of piezoelectric pump 6 of the first embodiment and is characterized by employing opposite portions adjacent to piezoelectric element 36 as a pump chamber (or working spaces 34A and 34B).

[0064]As shown in FIG. 3, piezoelectric pump 6 is provided with an inlet 37A (or a first inlet) provided on internal component 33A (or a first internal component) to pass a working medium flowing from an inlet pipe 41A (or a first aspiration pipe) external to casing 32 toward working space 34A (or a first internal space), an inlet 37B (or a second inlet) provided on an internal component 33B (or a second internal component) to pass the working medium flowing from an inlet pipe 41B (or a second aspiration pipe) external to casing 32 toward working space 34B (or a second internal space), an outlet 38A (or a first outlet) provided on internal comp...

third embodiment

[0069]FIG. 4 is a cross section of a piezoelectric pump in a third embodiment.

[0070]Piezoelectric pump 6 in the present embodiment is an exemplary variation of piezoelectric pump 6 of the first embodiment and is characterized by employing opposite portions adjacent to piezoelectric element 36 as a pump chamber (or working spaces 34A and 34B).

[0071]As shown in FIG. 4, piezoelectric pump 6 is provided with inlet 37A (or the first inlet) provided on internal component 33A (or the first internal component) to pass a working medium flowing from inlet pipe 41 (or an aspiration pipe) external to casing 32 toward working space 34A (or the first internal space), inlet 37B (or the second inlet) provided on internal component 33B (or the second internal component) to pass the working medium flowing from inlet 37A toward working space 34B (or the second internal space), outlet 38A (or the first outlet) provided on internal component 33A to pass the working medium flowing from working space 34A ...

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Abstract

A piezoelectric pump includes a casing formed of a plurality of metallic members welded and thus joined together, a piezoelectric element dividing an internal space of the casing into a working space and a back pressure space, and internal components formed of resin, and provided between the casing and the piezoelectric element and holding the piezoelectric element. The internal components are formed of workable and moldable resin. The internal component defines a perimeter of the working space and the internal component defines a perimeter of the back pressure space. The internal components are arranged opposite each other to form a recess therebetween to receive and thus hold the piezoelectric element therein.

Description

TECHNICAL FIELD [0001]The present invention relates piezoelectric pumps and Stirling refrigerators / freezers, and particularly to piezoelectric pumps efficiently circulating fluid in negative and positive pressure states and Stirling refrigerators / freezers equipped with such piezoelectric pumps.BACKGROUND ART [0002]Conventionally a piezoelectric pump employing a piezoelectric element of quartz, lithium niobate and the like has been used as a medium circulating pump.[0003]FIG. 6 is a cross section of one example of a conventional piezoelectric pump. With reference to FIG. 6, a piezoelectric pump 106 includes a casing 132, and a working space 134 and a back pressure space 135 in casing 132, as shown in FIG. 6. Working space 134 and back pressure space 135 are spaced by a piezoelectric element 136. Furthermore, a portion of the casing that is adjacent to working space 134 is provided with an inlet 137 aspirating a medium and an outlet 138 discharging the medium. A portion of the casing ...

Claims

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Application Information

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IPC IPC(8): F25B9/14F04B43/04F25D11/00F25B9/00F25D19/00
CPCF04B43/04F25B9/14F04B43/046F04B43/095F04B49/06F04B53/16F05B2210/11F05B2260/60F05B2280/6015F05C2253/20Y10S417/00
Inventor ZHANG, HENGLIANG
Owner SHARP KK
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