KR100758696B1 - Electrode structure of planar pump - Google Patents

Abstract

An electrode structure for a planar pump is provided to increase a discharge flow rate/pressure with increased electric field density between electrodes in the planar pump used for cooling a CPU by forming non-uniform electric field between the electrodes through diversifying the structure of a high voltage electrode and a ground electrode. A plurality of corrugated projected parts are formed to an opposite side of the high voltage electrode(21). The plurality of arc-typed grooves are formed to one side of the ground electrode(22). The plurality of grooves are formed to one side of the high voltage electrode. The plurality of corrugated projected parts are formed to the other side of the ground electrode.

Description

Electrode structure of planar pump

1 is an exploded perspective view showing a flat pump according to the present invention.

2 shows an electrode of a planar pump according to the invention.

3 is a view showing another example of the electrode of the planar pump according to the present invention.

4 is a view showing another example of the electrode of the planar pump according to the present invention.

5 is a graph showing the discharge flow rate experiment results according to the structure of the electrode of FIGS. 1,2 and 3;

Figure 6 is a graph showing the discharge flow rate experiment results according to the structure of the electrode of Figures 3 and 4.

7 is a view showing an electrode substrate of a conventional planar pump.

<Explanation of symbols for main parts of the drawings>

1: fluid receiving part

2: electrode

    21: high voltage electrode

         211: protrusions, 212: grooves

    22: ground electrode

         221: groove portion, 222: protrusion portion

3: base

4: pipe

5: cover

6: O-ring

The present invention relates to an electrode structure of a flat pump, and more particularly to an electrode structure of a flat pump that can increase the discharge flow rate and the discharge pressure by further improving the electric field density by the various structures of the electrode.

In general, a planar pump is used as a cooling device, such as a main processor (CPU) of a personal computer, using a field-reactive fluid in which active flow is generated between electrodes by an applied electric field as a working fluid.

Personal computers are speeding up day by day, and main processors are being announced at high speeds. High integration and high performance of electronic devices and electronic chips are rapidly progressing, but heat generation of the main processor is increasing with high-speed driving of the main processor.

Until now, air cooling, heat pipe, water cooling, and the like have been steadily developed as a countermeasure for heat generation of electronic devices and electronic chips, but it is difficult to apply to cooling a main processor having a heat generation amount of 100W or more in a notebook computer with limited installation space.

Especially in systems with limited installation space, such as notebook computers, the limit of main processor performance is determined by the cooling system, and a new cooling system that overcomes the limitations of existing cooling methods for cooling electronic devices such as next generation high heat notebook computers. Is calling for the development of

In order to solve this problem, when a direct current voltage is applied to an electrode inserted into a liquid, a thin flat pump without a mechanical moving part using a field-reactive fluid as a working fluid that generates active flow between the electrodes is applied as a fluid driving source of a liquid cooling system. .

As shown in FIG. 7, in the planar pump, the conventional electrode is formed of a pair of electrodes 100 including the high voltage electrode 101 and the ground electrode 102, and has a rectangular shape arranged in plurality.

That is, the pumping action in the planar pump using the field reactive fluid as the working fluid is formed by the flow generated from the high voltage electrode to the ground electrode by the electric field applied to the electrode, and the flow between the electrodes is caused by the non-uniform electric field. It increases as the density increases.

However, in the conventional electrode, when the high voltage electrode and the ground electrode have a rectangular shape, a uniform electric field is formed between the electrodes according to the applied electric field, and accordingly, due to a structure in which it is difficult to increase the electric field density between the electrodes, a planar type due to the flow of the field reactive fluid There was a problem that is difficult to increase the output of the pump.

Accordingly, the present invention has been invented to solve the above problems, by varying the structure of the high voltage electrode and the ground electrode to form a non-uniform electric field between the electrodes and thereby increasing the electric field density between the discharge flow rate and discharge pressure It is to provide an electrode structure of a planar pump that can improve the.

The present invention for achieving the above object, the fluid receiving portion provided to seal and accommodate the field-reactive fluid, and arranged in a plurality on one side of the fluid receiving portion consisting of a rectangular high voltage electrode and a ground electrode by the electric field In the planar pump including a pair of electrodes in which the flow of the reactive fluid occurs, the other side of the high-voltage electrode is characterized in that a plurality of serrated protrusions are further formed.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is an exploded perspective view showing a flat pump according to the present invention, Figure 2 is a view showing the electrode of the flat pump according to the present invention, Figure 3 is a view showing another example of the electrode of the flat pump according to the present invention, Figure 4 is a view showing another example of the electrode of the planar pump according to the present invention, Figure 5 is a graph showing the discharge flow rate experiment results according to the structure of the electrode of Figures 1,2 and 3, Figure 6 is Figure 3 And it is a graph showing the discharge flow rate experiment results according to the structure of the electrode of FIG.

1 and 2, the electrode structure of the planar pump according to the present invention has a fluid receiving portion (1) and a plurality of one side of the fluid receiving portion provided to seal the electric field reactive fluid In the planar pump comprising a pair of electrodes (2) arranged in the form of a rectangular high voltage electrode 21 and the ground electrode 22, the flow of the field-reactive fluid by the voltage, the high voltage electrode 21 On the other side of the sawtooth-like protrusion 211 is further formed a plurality.

In particular, the planar pump according to the present invention includes a base 3, a pipe 4 provided on both sides of the base 3, and a fluid receiving part 1 provided on an upper portion of the base 3. It consists of an electrode 2 and a cover 5 which is placed on top of the base 3.

The electrode substrate on which the electrode 2 is mounted uses a glass epoxy substrate, and an O-ring 6 is used to prevent leakage of the electroreactive fluid, which is a working fluid, from the pump chamber.

In addition, the base 3 uses a polyetherimide material, and the cover 5 preferably uses a polycarbonate material.

The combination of these forms a thin fluid receiving portion 1 that seals and accommodates the field reactive fluid.

2, the distance L1 between the protrusion 211 of the high voltage electrode 21 and the rectangular ground electrode 22 is closest to meet horizontally from the end of the protrusion 211, so that an electric field is also formed the largest. . Therefore, the flow is mainly generated in the horizontal direction at the end of the protrusion 211, it is difficult to occur in the diagonal direction.

Hereinafter, the operation of the planar pump according to the present invention will be described.

An electric field reactive fluid, which is a working fluid, is injected into the pump chamber into which the electrode substrate is inserted.

When a direct current voltage is applied to the electrode 2 in the pump chamber, flow is generated from the high voltage electrode 21 to the ground electrode 22 by the electric field around the electrode 2.

The momentum of the flow of the field-reactive fluid generated by the applied electric field is transmitted to the fluid on top of the electrode 2 in a stationary state.

Then, a local flow in which the fluid around the electrode 2 moves occurs, and as the local flow develops, the flow in the flow path is sequentially formed.

Thus, the absence of mechanical moving parts makes it possible to realize noiseless and vibration-free pumps, and to realize a compact, lightweight and thin pump, which is suitable as a driving source for the forced liquid cooling system of notebook computers.

3 and 4, the electrode according to the present invention can understand the relationship between the applied voltage and the discharge flow rate through the embodiment of the various structures.

That is, as shown in Figure 3, a plurality of arc-shaped groove portion 221 is further formed on one side of the ground electrode 22.

Therefore, the distance from the protrusion 211 to the arc-shaped groove 221 is constant due to the arc-shaped groove 221, so that the electric field from the end of the protrusion 211 to the arc-shaped groove 221 is kept constant, as well as the protrusion. At 211, flow occurs over the entire range of the arcuate groove 221.

As shown in FIG. 4, a plurality of grooves 212 are further formed at one side of the high voltage electrode 21, and a plurality of serrated protrusions 222 are further formed at the other side of the ground electrode 22. .

Hereinafter, the flow rate experiment results according to the structure of the electrode according to the present invention will be described.

As shown in FIGS. 5 and 6, the flow of the field reactive fluid formed by the applied voltage is generated in proportion to the electric field, and the discharge flow rate increases by increasing the applied voltage.

First, in FIG. 5, the electrodes shown in FIGS. 1 and 2 are represented by no. 1 and the electrodes shown in FIG. 3 are represented by no. 2 for convenience.

As shown in FIG. 5, the graph curves of no. 1 and no. 2 show that the discharge flow rate increases as the voltage increases from no. 1 to no. 1.

Accordingly, the electrode structures shown in FIG. 2 and FIG. 3 will be described as follows.

Herein, the lengths of the distances B, S1, S2, L1, and L2 displayed on the two electrodes except for L1 are the same.

As shown in FIGS. 2 and 3, the electric field density between electrodes for the same applied voltage varies depending on the distance L1 between the high voltage electrode 21 and the ground electrode 22.

In FIG. 2, when the voltage is applied from the high voltage electrode 21 to the rectangular ground electrode 22, the distance L1 between the end of the protruding portion 211 of the high voltage electrode 21 and the ground electrode 22 is horizontal. The electric field is formed the highest, the electric field is lowered as the distance (L1) moves away from the end of the protrusion 211 of the high voltage electrode 21 up and down the ground electrode 22. Therefore, the flow between the electrodes is reduced and the discharge flow rate is lowered.

Meanwhile, in FIG. 3, when a voltage is applied to the ground electrode 22 having the arc-shaped groove 221 formed at the end of the protrusion 211 of the high voltage electrode 21, at the end of the protrusion 211 of the high voltage electrode 21. The distance L1 to the groove portion 221 is maintained at a constant distance even when moving to the upper and lower portions of the ground electrode 22 in a horizontal state.

Accordingly, it can be understood that the electrode 2 shown in FIG. 3 in which the arc-shaped groove portion 221 is formed more than the case where the ground electrode 22 is rectangular has an increased electric field density and consequently an increased discharge flow rate. will be.

In FIG. 6, for convenience, the electrode illustrated in FIG. 3 is represented by no. 2, and the electrode illustrated in FIG. 4 is represented by no. 3.

Looking at the graph curves of No. 2 and No. 3 in Fig. 6, it can be seen that the discharge flow rate also increases with the increase in voltage than no.

3 and 4, the electrode of FIG. 3 is a structure in which voltage is applied to the ground electrode 22 having the arc-shaped groove 221 formed at the end of the protruding portion 211 of the high voltage electrode 21. 4 is a structure in which the protrusion 222 is further formed on the other side of the ground electrode 22 having the groove 221, and is positioned at regular intervals without a pair of distance L2 between the electrodes.

Therefore, in the electrode 2 of FIG. 4, a phenomenon in which a voltage is applied to the groove 221 of the ground electrode 22 at the end of the protruding portion 211 of the high voltage electrode 21 is continuously performed on the other pair of electrodes 2. It can be seen that. Therefore, the discharge flow rate of the planar pump may be increased by increasing the number of protrusions 211 of the electrode in which the flow of the field reactive fluid occurs between the electrodes rather than the electrode 2 of FIG. 3.

As described above, the electrode structure of the planar pump according to the present invention can increase the electric field density at the same applied voltage as compared with the rectangular electrode pair by forming a plurality of tooth-shaped protrusions and arc-shaped grooves. Has the effect of improving the output.

While the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Therefore, the scope of the invention should be construed by the claims described to include examples of many such variations.

Claims (3)

A fluid receiving portion (1) provided to seal and receive an electric field reactive fluid, and a plurality of rectangular high voltage electrodes (21) and ground electrodes (22) arranged on one side of the fluid receiving portion (1) by a voltage In a planar pump comprising a pair of electrodes (2) in which flow of an electric field reactive fluid occurs, On the other side of the high voltage electrode 21, a plurality of tooth-shaped protrusions 211 are further formed, Electrode structure of a flat pump, characterized in that a plurality of arc-shaped groove portion 221 is further formed on one side of the ground electrode (22). delete According to claim 1, A plurality of grooves 212 is further formed on one side of the high voltage electrode 21, The other side of the ground electrode 22, the electrode structure of the flat pump, characterized in that a plurality of serrated protrusions 222 is further formed.

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