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Piezoelectric type cooling device

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Piezoelectric type cooling device


There is provided a piezoelectric type cooling device including: a housing having an internal space formed by combining an upper housing and a lower housing and having openings allowing the internal space to be in communication with the atmosphere to allow air to be introduced thereinto and discharged therefrom; a diaphragm provided to traverse the internal space of the housing to divide the internal space into upper and lower blower chambers; and a piezoelectric actuator provided on at least one surface of the diaphragm to provide vertical driving force to the diaphragm.

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Inventor: Viatcheslav SMIRNOV
USPTO Applicaton #: #20120301333 - Class: 4174132 (USPTO) - 11/29/12 - Class 417 
Pumps > Motor Driven >Electric Or Magnetic Motor >Collapsible Wall Pump >Diaphragm Type >Piezoelectric Driven

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The Patent Description & Claims data below is from USPTO Patent Application 20120301333, Piezoelectric type cooling device.

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CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Korean Patent Application No. 10-2011-0050315 filed on May 26, 2011, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a piezoelectric type cooling device using a piezoelectric actuator.

2. Description of the Related Art

When various electronic devices, including a computer, are continuously used, heat is generated therein and may deteriorate the performance thereof. Therefore, various electronic devices include at least one cooling unit.

According to the related art, a fan type cooling unit has mainly been used. However, a cooling device using a fan has excessive noise, excessive power consumption, difficulties in a manufacturing method thereof, and difficulties in miniaturization. Therefore, there is a need to provide a novel cooling device solving the defects according to the related art.

SUMMARY

OF THE INVENTION

An aspect of the present invention provides a cooling device capable of having relatively low noise and low power consumption, being simply manufactured, and being easily miniaturized.

According to an aspect of the present invention, there is provided a piezoelectric type cooling device including: a housing having an internal space formed by combining an upper housing and a lower housing and having openings allowing the internal space to be in communication with the atmosphere to allow air to be introduced thereinto and discharged therefrom; a diaphragm provided to traverse the internal space of the housing to divide the internal space into upper and lower blower chambers; and a piezoelectric actuator provided on at least one surface of the diaphragm to provide vertical driving force to the diaphragm.

The upper and lower housings may be symmetrical with regard to one another.

The openings may be provided in the upper and lower housings, respectively.

The openings provided in the upper housing may be provided in a side or a main surface thereof.

The openings provided in the lower housing may be provided in a side or a main surface thereof.

Each of the upper and lower housing may include an air channel groove formed in an inner peripheral surface thereof.

The air channel groove may be in communication with the opening at at least one point.

Inner peripheral surfaces of the upper and lower housings may have a dome shape corresponding to a shape in which the diaphragm moves vertically.

The diaphragm may be fitted between an upper edge and a lower edge at which the upper and lower housings are combined with each other.

The housing may have a cylindrical shape.

The housing may have a rectangular pillar shape.

A plurality of the piezoelectric actuators may be provided in a manner in which they are overlapped on at least one surface of the diaphragm.

According to another aspect of the present invention, there is provided a piezoelectric type cooling device including: a housing having an internal space formed by combining an upper housing and a lower housing and having openings allowing the internal space to be in communication with the atmosphere to allow air to be introduced thereinto and discharged therefrom; a plurality of diaphragms each provided to traverse the internal space of the housing to divide the internal space into a plurality of blower chambers having a vertically multilayered shape; and a plurality of piezoelectric actuators each provided on at least one surface of the plurality of diaphragms to provide vertical driving force to the plurality of diaphragms.

The openings may be provided so that each of the blower chambers is in communication with the atmosphere.

The openings provided in a blower chamber adjacent to a main surface of the upper or lower housing among the blower chambers may be provided in a side or the main surface of the upper or lower housing.

The openings provided in a blower chamber formed by the side of the upper or lower housing and the diaphragm, among the blower chambers, may be provided in the side of the upper or lower housing.

The blower chamber formed by the side of the upper or lower housing and the diaphragm, among the blower chambers, may further include a partition wall provided to traverse the internal space thereof.

The partition wall may be provided to have a through-hole formed therein, such that the air may be vertically introduced or discharged.

According to another aspect of the present invention, there is provided a piezoelectric type cooling device including: a housing having an internal space formed by combining an upper housing and a lower housing and having openings allowing the internal space to be in communication with the atmosphere to allow air to be introduced thereinto and discharged therefrom; a lattice dividing partition wall dividing the internal space of the housing in a lattice form to form a plurality of individual spaces; diaphragms each provided to traverse the individual spaces of the housing to divide each of the individual spaces into a plurality of blower chambers; and a plurality of piezoelectric actuators each provided on at least one surface of the diaphragms each provided in the plurality of individual spaces to provide vertical driving force to the diaphragms provided in each of the individual spaces.

The diaphragms may be connected as one.

A plurality of the diaphragms may be provided to traverse the individual spaces of the housing to divide each of the individual spaces into the plurality of blower chambers having a vertically multilayered shape.

According to another aspect of the present invention, there is provided a piezoelectric type cooling device formed by vertically multi-layering a plurality of piezoelectric type cooling devices, the piezoelectric type cooling device including: a housing having an internal space formed by combining an upper housing and a lower housing and having openings allowing the internal space to be in communication with the atmosphere to allow air to be introduced thereinto and discharged therefrom; a diaphragm provided to traverse the internal space of the housing to divide the internal space into upper and lower blower chambers; and a piezoelectric actuator provided on at least one surface of the diaphragm to provide vertical driving force to the diaphragm.

According to another aspect of the present invention, there is provided a piezoelectric type cooling device formed by vertically multi-layering a plurality of piezoelectric type cooling devices, the piezoelectric type cooling device including: a housing having an internal space formed by combining an upper housing and a lower housing and having openings allowing the internal space to be in communication with the atmosphere to allow air to be introduced thereinto and discharged therefrom; a plurality of diaphragms each provided to traverse the internal space of the housing to divide the internal space into a plurality of blower chambers; and a plurality of piezoelectric actuators each provided on at least one surface of the plurality of diaphragms to provide vertical driving force to the plurality of diaphragms.

The upper housing may include a coupling protrusion protruded upwardly from a main surface thereof, and the lower housing may include a coupling groove into which a coupling protrusion provided on an upper housing of one piezoelectric type cooling device adjacent to a lower portion of another piezoelectric type cooling device is insertedly fixed, the coupling groove being provided in a main surface thereof so as to correspond to the coupling protrusion.

According to another aspect of the present invention, there is provided a piezoelectric type cooling device formed by adjacently coupling a plurality of piezoelectric type cooling devices to each other on the same plane, the piezoelectric type cooling device including: a housing having an internal space formed by combining an upper housing and a lower housing and having openings allowing the internal space to be in communication with the atmosphere to allow air to be introduced thereinto and discharged therefrom; a diaphragm provided to traverse the internal space of the housing to divide the internal space into upper and lower blower chambers; and a piezoelectric actuator provided on at least one surface of the diaphragm to provide vertical driving force to the diaphragm.

According to another aspect of the present invention, there is provided a piezoelectric type cooling device formed by adjacently coupling a plurality of piezoelectric type cooling devices to each other on the same plane, the piezoelectric type cooling device including: a housing having an internal space formed by combining an upper housing and a lower housing and having openings allowing the internal space to be in communication with the atmosphere to allow air to be introduced thereinto and discharged therefrom; a diaphragm provided to traverse the internal space of the housing to divide the internal space into upper and lower blower chambers; and a piezoelectric actuator provided on at least one surface of the diaphragm to provide vertical driving force to the diaphragm.

The housing may include a coupling protrusion protruded laterally from one side thereof, and the lower housing may include a coupling groove into which a coupling protrusion provided on one side of a housing of one piezoelectric type cooling device adjacent to the other side of another piezoelectric type cooling device is insertedly fixed, the coupling groove being provided in the other side thereof so as to correspond to the coupling protrusion.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is an assembled perspective view of a piezoelectric type cooling device according to an embodiment of the present invention;

FIG. 2 is an exploded perspective view of the piezoelectric type cooling device according to the embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 5 is a plan view of an upper housing or a lower housing, which is a component according to the embodiment of the present invention, when being viewed from an inner side thereof;

FIGS. 6A through 6C are cross-sectional views showing examples in which a diaphragm, a component according to the embodiment of the present invention, is coupled;

FIGS. 7A through 7E are cross-sectionals view showing various examples of openings provided according to the embodiment of the present invention;

FIGS. 8A through 8E are plan views showing various examples of the opening shown in FIGS. 7A through 7E;

FIGS. 9A and 9B are reference views showing an operation of the piezoelectric type cooling device according to the embodiment of the present invention;

FIGS. 10A and 10B are cross-sectional views and internal perspective views showing a shape in which a printed circuit board (PCB), a flexible flat cable (FFC), and the like, supplying power to the piezoelectric actuator according to the embodiment of the present invention are coupled;

FIGS. 11A and 11B are plan views showing a diaphragm including the piezoelectric actuator used in FIGS. 10A and 10B; and

FIGS. 12A through 18B are views showing various examples in which a plurality of piezoelectric type cooling devices are provided according to another embodiment of the present invention.

DETAILED DESCRIPTION

OF THE EMBODIMENTS

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stats Patent Info
Application #
US 20120301333 A1
Publish Date
11/29/2012
Document #
13418975
File Date
03/13/2012
USPTO Class
4174132
Other USPTO Classes
International Class
04B17/03
Drawings
27



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