KR102091698B1 - Phase change cooling device and phase change cooling method - Google Patents

Abstract

One embodiment of the present invention provides a phase change cooling device and a phase change cooling method, which increase the cooling efficiency of an object to be cooled by maintaining the value of a heat transfer coefficient large when the phase of a cooling medium changes. The phase change cooling device comprises a cooling channel, a cooling medium, a trap, and a discharge channel. One side surface of the cooling channel is contacted to an objected to be cooled, and a micro hole is formed in the other side surface thereof. The cooling medium moves inside the cooling channel and absorbs the heat from the object to be cooled. The trap is provided inside the cooling channel, so that the cooling medium absorbs the heat of the object to be cooled to trap the bubbles generated as the phase changes. The discharge channel is provided on the other side surface of the cooling channel and guides the bubbles captured by the trap and flowing through the micro-hole to be discharged. In particular, the cooling medium can undergo a phase change from a liquid state to a gaseous state at the temperature range of heat generated in the object to be cooled.

Description

Phase change cooling device and phase change cooling method {PHASE CHANGE COOLING DEVICE AND PHASE CHANGE COOLING METHOD}

The present invention relates to a phase change cooling device and a phase change cooling method, and more specifically, a phase change cooling device and phase that increases the cooling efficiency of the object to be cooled by maintaining a large heat transfer coefficient during phase change of the cooling medium. It relates to a change cooling method.

Components such as semiconductors and devices accommodated in various electronic products, battery packs used in electric vehicles, and the like generate heat during use. If the heat generated in this case is not cooled and dissipated by taking appropriate cooling measures, the performance may deteriorate, and in severe cases, damage may occur due to overheating.

As a cooling means for preventing overheating of the components, the battery pack, that is, the object to be cooled, a cooler is installed to prevent overheating, and the operation method of the cooler is generally divided into two types.

One is an air-cooled cooler that cools and dissipates heat by circulating air on the surface of a component using a fan, and the other is a water-cooled cooler that cools and dissipates heat by flowing a fluid serving as a refrigerant to the surface of the object to be cooled.

Each of the above-mentioned cooling methods has advantages and disadvantages, but the installation cost is low for air-cooled cooling, but the cooling efficiency is low compared to water-cooled, and the cooling efficiency is very good for water-cooled, but the installation cost is high compared to air-cooled. Therefore, water-cooled coolers are mainly applied to objects to be cooled that require high cooling efficiency.

A representative example of such a water-cooled cooler is a cooling jacket. Conventional cooling jackets are generally provided in a form in which the cooling flow path is bent, and the cooling liquid absorbs heat of the object to be cooled while flowing inside the cooling flow path. This is a method to increase the contact area between the coolant and the inner wall of the jacket by increasing the length of the coolant passage inside the jacket as much as possible to efficiently transfer heat from the object to be cooled to the coolant.

However, in the conventional cooling jacket, the temperature is changed while the cooling liquid absorbs the heat of the object to be cooled. The temperature gradually increases while the coolant flows through the inside of the cooling passage. Therefore, the temperature difference between the cooling surface and the other side of the body to be cooled closer to the outlet side of the cooling flow passage is lower than the temperature difference between the cooling jacket and one side of the body to be cooled close to the inlet side of the cooling flow passage.

Due to this, the degree of cooling of one side of the object to be cooled is greater than that of the other side, and the object to be cooled has to be cooled unevenly as a whole.

In addition, in the conventional cooling jacket, since heat transfer is performed by single-phase flow without changing the state of the coolant, the flow rate must be increased to improve the heat transfer coefficient. This is because the heat transfer coefficient of a single phase cooling medium is lower than that of 1/5 to 1/10 compared to the heat transfer coefficient in the process in which the cooling medium is boiled in two phases.

As a result, in order to increase the heat flux (heat transfer amount per unit area or unit time, heat flux) of the object to be cooled, the cooling flow rate must be increased, so that the entire cooling system including the pump is enlarged.

Republic of Korea Registered Patent Publication No. 0610293 (announced on Aug. 09, 2006)

In order to solve the above problems, the technical problem to be achieved by the present invention is a phase change cooling device and a phase change cooling method to increase the cooling efficiency of the object to be cooled by maintaining a large size of the heat transfer coefficient during phase change of the cooling medium. Is to provide

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following description. There will be.

In order to achieve the above technical problem, an exemplary embodiment of the present invention includes a cooling channel in which one side is in contact with a body to be cooled and a micro hole is formed in the other side; A cooling medium that moves inside the cooling channel and absorbs heat of the object to be cooled; A trap provided inside the cooling channel and trapping bubbles generated while the cooling medium absorbs heat of the object to be cooled and changes phase; And it is provided on the other side of the cooling channel, and includes a discharge channel for guiding to discharge the bubbles trapped by the trap and flowing through the micro-hole, the cooling medium is the temperature of the heat generated in the object to be cooled It provides a phase change cooling device characterized in that the phase change occurs from the liquid state to the gas state in the stage.

In an embodiment of the present invention, the trap is formed to extend in the height direction of the cooling channel, and is provided to be enlarged in the opposite direction to the direction of movement of the cooling medium, and the concave portion to capture the moving bubbles, and It may have an attachment formed in the direction of movement of the cooling medium.

In an embodiment of the present invention, the trap may further have a groove formed in a height direction of the cooling channel on a rear side facing the moving direction of the cooling medium.

In an embodiment of the present invention, the micro-hole may be formed in a region corresponding to the recess of the trap.

In an embodiment of the present invention, the cooling channel may be formed to have a smaller cross-sectional area toward the flow direction of the cooling medium.

In an embodiment of the present invention, the discharge channel may be formed to have a larger cross-sectional area toward the flow direction of the cooling medium.

On the other hand, in order to achieve the above technical problem, in one embodiment of the present invention, one side is in contact with the object to be cooled, and the other side is moved by moving the cooling medium inside the cooling channel in which micro holes are formed. A heat absorption step of absorbing heat; A bubble trapping step in which a trap provided inside the cooling channel traps bubbles generated while the cooling medium absorbs heat of the object to be cooled and changes phase; And a discharge step in which the discharge channel provided on the other side of the cooling channel is captured by the trap and the bubbles flowing through the micro hole are discharged. In the heat absorption step, the cooling medium is It provides a phase change cooling method characterized in that the phase change occurs from a liquid state to a gaseous state at a temperature range of heat generated from the cooling body.

In an embodiment of the present invention, the trap is formed to extend in the height direction of the cooling channel, and has a concave portion provided to be enlarged in the opposite direction to the moving direction of the cooling medium, and is generated and moved in the cooling channel. The bubble may be captured by the recess.

In an embodiment of the present invention, the bubble captured by the concave portion may be introduced into the discharge channel through the micro-hole formed in a region corresponding to the concave portion of the trap.

In an embodiment of the present invention, the trap may further have a groove formed in a height direction of the cooling channel on a rear side facing the moving direction of the cooling medium.

According to an embodiment of the present invention, according to the present invention, by effectively discharging the bubbles generated in the cooling channel to the discharge chamber using a trap, the amount of bubbles in the cooling channel is reduced, and the phase change of the cooling medium is not completed and continues. You can make it phase change. Accordingly, it is possible to increase the time for which the thermoelectric step number remains high, and through this, an improved cooling efficiency effect can be obtained.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view schematically showing a phase change cooling device according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line A-A 'in FIG. 1.
3 is a cross-sectional view taken along line B-B 'in FIG. 1.
4 is a graph showing the change in the heat transfer coefficient during phase change.
5 is an exemplary view showing a trap of the phase change cooling device of FIG. 1 as a center.
6 is an exemplary view for explaining that bubbles are generated and captured in the trap of FIG. 5.
7 is an exemplary view showing another embodiment of the trap of FIG. 5.
8 is an exemplary view showing another embodiment of a cooling channel and a discharge channel of the phase change cooling device of FIG. 1.
9 is a flowchart showing a phase change cooling method according to a first embodiment of the present invention.
10 is a sectional view illustrating a phase change cooling device according to a second embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and thus is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is “connected (connected, contacted, coupled)” to another part, it is not only “directly connected”, but also “indirectly connected” with another member in between. It also includes the case where it is. Also, when a part “includes” a certain component, this means that other components may be further provided instead of excluding other components, unless otherwise stated.

The terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, the terms “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

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

1 is a perspective view schematically showing a phase change cooling apparatus according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line A-A 'in FIG. 1, and FIG. 3 is a cross-sectional view taken along line B-B' in FIG. .

1 to 3, the phase change cooling device may include a cooling channel 100, a cooling medium 200, a trap 300, and a discharge channel 400.

The cooling channel 100 may be provided so that one side contacts the object to be cooled 10.

The cooling channel 100 may be made of a material having excellent thermal conductivity. One side of the cooling channel 100 may be installed to receive heat while contacting the object to be cooled 10.

The object to be cooled 10 is a heat source, and may mean a heating element that generates heat, such as a CPU built in a PC, a graphic chipset, and a battery pack mounted in an electric vehicle.

The cooling channel 100 includes an inlet 110 through which the cooling medium 200 is introduced, and an outlet 120 through which the cooling medium 200 is discharged. The cooling medium 100 is provided at the inlet 110 and the outlet 120, respectively. 200) may be coupled to the first connector 130 to guide the movement. The first connection pipe 130 connected to the inlet 110 may further be provided with a flow control valve (not shown) that can control the flow rate of the cooling medium 200.

The cooling medium 200 moves inside the cooling channel 100 and can absorb heat H of the object to be cooled 10.

The cooling medium 200 is also called a phase change material, and a material having a low saturation temperature at which a state change occurs is low and a specific volume is small, that is, a material capable of absorbing a lot of heat in the same mass is advantageous. .

In particular, the cooling medium 200 may be a material that undergoes a phase change from a liquid state to a gas state at a temperature range of heat H generated from the object to be cooled 10. The cooling medium 200 may be appropriately selected according to the object to be cooled 10. For example, when the object to be cooled 10 is a high-density chipset such as a CPU or a GPU, the cooling medium 200 is a substance that undergoes a phase change from a liquid state to a gaseous state at a temperature range of heat generated while the high-density chipset is operating. Can be selected. As the cooling medium 200, water, freon gas, perfluoro carbon liquid, or the like may be used, but of course, the present invention is not limited thereto.

Figure 4 is a graph showing the change in the heat transfer coefficient at the time of phase change, Figure 4 (a) shows the change in the heat transfer coefficient of the perfusion system at a constant heat flux value.

The heat transfer coefficient may be increased when a phase change occurs, as shown in FIG. 4 (a), and the heat transfer coefficient α is rapidly increased in the vicinity of the first point P1 that becomes saturated water. . The heat transfer coefficient (α) has the shape of the first curve (C1) at low heat flux (Low Heat Flux), but has a shape of the second curve (C2) at medium heat flux (Medium Heat Flux) and is higher than at low heat flux. do. And, at a high heat flux (High Heat Flux) it has the shape of the third curve (C3) is the highest. Therefore, in order to absorb the heat of the body 10 to cool the body 10 more effectively, it is preferable that the heat transfer coefficient α has a third curve C3. However, when the heat transfer coefficient α has the shape of the third curve C3, the time for which the heat transfer coefficient α is maintained high is reduced. That is, when the heat transfer coefficient (α) has a form of the first curve (C1), the thermoelectric step number may be maintained in a high state until the vicinity of the second point (P2) which becomes saturated steam. As the shape of the curve C2 or the shape of the third curve C3 increases, the time that the heat transfer coefficient α can be maintained in a high state decreases. Therefore, in order to increase the cooling efficiency of the object to be cooled 10, it is most preferable that the heat transfer coefficient α has the shape of the third curve C3, but the duration thereof becomes long.

In each of the first curve (C1), the second curve (C2), and the third curve (C3), when a point at which the heat transfer coefficient is lowered is connected, a fourth curve (C4) which is a burnout curve ).

Referring to FIGS. 1 to 3 again, when the cooling medium 200 flows along the cooling channel 100 by flowing into the inlet 110 of the cooling channel 100, the cooling medium 200 is the object to be cooled ( 10) by absorbing heat (H) to boil, then the bubble 210 is generated. The bubbles 210 are generated as the time for absorbing the heat H of the object to be cooled 10 increases, that is, toward the rear of the cooling channel 100.

As described above, when the heat source evaporates the liquid, a phase change is carried out from the liquid to the gas, and a high heat transfer coefficient can be realized and maintained by the phase change. However, the moment the bubble 210 occurs, the bubble 210 mixes with the cooling medium 200, and thus, as the number of the bubbles 210 increases, the area where the heat source and the cooling medium 200 contact each other decreases. And, when the bubble 210 comes into contact with a heat source a lot, it becomes a gas phase (one phase), so the heat transfer effect can be reduced compared to a phase change heat transfer.

In other words, when the heat source is in the form of an area, when the heat source is in contact with the liquid and the liquid causes a phase change to gas, the heat transfer coefficient may increase and have a high heat transfer effect. However, when the heat source contacts the bubble, a single phase occurs, thereby causing heat transfer. The coefficient is lowered and may cause a low heat transfer effect. Therefore, separating the bubble from the heat source helps to maintain a high heat transfer coefficient, and in the present invention, a trap 300 is provided to effectively separate the bubble from the heat source.

The trap 300 is provided inside the cooling channel 100, and the cooling medium 200 can absorb the heat (H) of the object to be cooled 10 to capture the bubbles 210 generated while changing phase. . For effective trapping of the bubble 210, a plurality of traps 300 may be provided when the size of the cooling channel 100 increases.

5 is an exemplary view showing the trap of the phase change cooling device of FIG. 1 as a center, and FIG. 6 is an exemplary view for explaining that bubbles are generated and captured in the trap of FIG. 5.

5 and 6, the trap 300 may be provided to extend in the height direction of the cooling channel 100. For example, the lower end of the trap 300 may be in close contact with the lower surface of the cooling channel 100 and the upper end may be in close contact with the upper surface of the cooling channel 100.

The trap 300 may be formed to be enlarged in a direction opposite to the moving direction FD of the cooling medium 200, and may have a concave portion 310 and an attachment 320. The concave portion 310 is a portion that is enlarged and formed in a direction opposite to the direction in which the cooling medium 200 moves, and may mix and move the bubble 210 mixed with the cooling medium 200. In addition, the attachment 320 may be formed in the moving direction FD of the cooling medium 200.

As the trap 300 is formed to expand in the opposite direction to the moving direction FD of the cooling medium 200, a pressure drop occurs at the rear surface 301 of the trap 300, and thus, the rear surface of the trap 300 In 301, bubbles may be easily generated due to boiling.

Bubbles generated on the rear surface 301 of the trap 300 can be largely moved in two forms. That is, some of the bubbles 210a may move directly along the moving direction FD of the cooling medium 200 away from the rear surface 301 of the trap 300 by the moving cooling medium 200. Then, another portion of the bubble 210b may move along the rear surface 301 of the trap 300 by surface tension. When the bubble 210b moves along the rear 301 of the trap 300, the bubble 210b moved to the attachment 320 of the trap 300 moves away from the attachment 320 and moves the cooling medium 200 It can move along the direction FD.

By attaching 320 to the rear of the trap 300, bubbles moving along the back 301 of the trap 300 can be more easily disengaged from the trap 300.

The bubble 210b moving away from the front trap 300a may be captured in the recess 310 of the rear trap 300b. At this time, in the trap 300b at the rear, a new bubble 210c may be generated in the same manner as described above, and the bubble 210c generated in this manner may be moved to a trap provided at the rear and captured.

Meanwhile, a micro hole 102 may be formed on the other side 101 of the cooling channel 100. Here, the other side 101 of the cooling channel 100 may be an upper surface of the cooling channel 100.

The micro-hole 102 may be intensively formed in an area corresponding to the concave portion 310 of the trap 300, and the number of the micro-holes 102 may be adjusted according to the size of the trap 300. In addition, the micro-hole 102 is not limited to this, and may be formed entirely on the other side 101 of the cooling channel 100. In addition, the micro-hole 102 may be formed by processing, but is not limited thereto, and when the cooling channel 100 is made of a material having a void, the micro-hole 102 may be such a void.

Since the bubble has a smaller density than the cooling medium 200, bubbles trapped in the concave portion 310 of the trap 300 may be discharged through the micro-hole 102. Since the cooling medium 200 is denser than the bubble and moves at a constant speed, if the size of the micro hole 102 is sufficiently small, the cooling medium 200 may not leak upward through the micro hole 102.

Meanwhile, FIG. 7 is an exemplary view showing another embodiment of the trap of FIG. 5, as shown in FIG. 7, the trap 300b may further have a groove 350. The groove 350 may be formed in the height direction of the cooling channel 100 on the rear surface 301 of the trap 300b.

When the groove 350 is further formed on the rear surface 301 of the trap 300b, since the groove 350 forms a cavity and a lower pressure is formed than the surroundings, phase change can easily occur and bubble generation is more likely. It can be induced effectively.

The discharge channel 400 is provided on the other side 101 of the cooling channel 100 and can be guided to discharge the bubble 210 captured by the trap 300 and flowing through the micro-hole 102.

The other side 101 of the cooling channel 100 becomes the upper surface of the cooling channel 100 and may be the lower surface of the discharge channel 400. Therefore, the bubble 210 discharged to the micro hole 102 may be directly introduced into the discharge channel 400.

An outlet 410 may be provided at the rear of the discharge channel 400. The bubble 210 flowing into the discharge channel 400 may be discharged directly into the atmosphere through the outlet 410. Alternatively, a second connection pipe 420 may be coupled to the outlet 410, and a separate suction unit (not shown) for sucking the bubble 210 inside the discharge channel 400 may be coupled to the second connection pipe 420. ) May be further connected.

In the foregoing, it was said that the bubble 210 is discharged through the discharge channel 400, but this is described for convenience, and in reality, the bubble 210 is not the shape of the bubble when it enters the discharge channel 400, but the evaporated gas. ).

According to the present invention, by effectively discharging the bubble 210 generated in the cooling channel 100 to the discharge channel 400 using the trap 300, the pressure inside the cooling channel 100 due to the creation of the bubble 210 It is possible to prevent the drop, and by reducing the amount of the bubble 210 in the cooling channel 100, the phase change of the cooling medium 200 is not completed in the entire section of the cooling channel 100, and the cooling medium 200 continues. You can make it phase change.

Figure 4 (b) shows a change in the heat transfer coefficient when the phase change of the cooling medium according to the present invention, as described above, the phase change of the cooling medium is not completed by allowing the cooling medium to continuously phase change, As shown in FIG. 4 (b), the heat transfer coefficient α may have a shape of a third curve C3 '. That is, the time for maintaining the state while maintaining the high heat transfer coefficient (α) can be changed to be extended. Accordingly, the fourth curve C4 'may be formed at a position extending further in the direction of the second point P2.

As described above, according to the present invention, by removing the bubble 210, the phase change of the cooling medium 200 is not completed and the phase change can be continued to increase the time for which the thermoelectric step number is kept high, through which A higher cooling efficiency effect can be obtained.

On the other hand, Figure 8 is an exemplary view showing another embodiment of the cooling channel and the discharge channel of the phase change cooling device of Figure 1, as shown in Figure 8, the cooling channel 100 is the flow direction of the cooling medium 200 It may be formed to have a smaller cross-sectional area. In addition, the discharge channel 400 may be formed to have a larger cross-sectional area toward the flow direction of the cooling medium 200.

Since the cooling medium 200 can continue to evaporate while absorbing the heat of the object to be cooled 10, the flow rate of the cooling medium 200 decreases toward the rear of the cooling channel 100, so that the moving speed may decrease. . However, if the cooling channel 100 is formed to have a smaller cross-sectional area toward the flow direction of the cooling medium 200, the moving speed of the cooling medium 200 can be maintained even at the rear end of the cooling channel 100.

When the cooling channel 100 is formed to decrease in cross-sectional area toward the flow direction of the cooling medium 200, the trap 300 may also be formed to decrease in height toward the flow direction of the cooling medium 200.

In addition, since the amount of generation of the bubble 210 increases toward the rear end of the cooling channel 100, a greater amount of gas is introduced at the rear end than at the front end of the discharge channel 400, so that the differential pressure may increase. However, when the discharge channel 400 is formed such that the cross-sectional area increases toward the flow direction of the cooling medium 200, such a high differential pressure can be improved.

9 is a flowchart showing a phase change cooling method according to a first embodiment of the present invention.

As shown in FIG. 9, the top surface cooling method may include a heat absorption step (S510), a bubble capture step (S520), and a discharge step (S530).

The heat absorption step (S510) may be a step of absorbing heat of the object to be cooled by moving the cooling medium inside a cooling channel in which a micro hole is formed on one side of the object to be cooled.

In the heat absorption step (S510), the cooling medium may undergo a phase change from a liquid state to a gaseous state at a temperature range of heat generated from the object to be cooled.

The bubble capturing step (S520) may be a step in which traps provided in the cooling channel capture bubbles generated while the cooling medium absorbs heat of the object to be cooled and changes phase.

The trap is formed to extend in the height direction of the cooling channel, and may have a concave portion provided to be enlarged in the opposite direction to the moving direction of the cooling medium. In the bubble capturing step (S520), bubbles generated and moved in the cooling channel may be captured by the concave portion.

The discharging step (S530) may be a step in which the discharging channel provided on the other side of the cooling channel is captured by the trap and the bubbles flowing through the micro holes are discharged.

Here, the micro-hole may be formed in a region corresponding to the recess of the trap, and bubbles captured by the recess may flow into the discharge channel through the micro-hole.

Since a pressure drop may occur at the rear side of the trap, an environment in which bubbles can be more easily generated may be provided. A groove formed in the height direction of the cooling channel is further formed at the rear side of the trap facing the direction of movement of the cooling medium. By doing so, it is possible to provide an environment in which bubbles can be generated more effectively.

By discharging the bubbles generated in the cooling channel to the discharge channel using traps, the phase change of the cooling medium in the entire section of the cooling channel is not completed and the phase change continues, so that a higher heat transfer coefficient can be maintained. In this way, higher cooling efficiency can be realized.

10 is a sectional view illustrating a phase change cooling device according to a second embodiment of the present invention.

As shown in FIG. 10, in the phase change cooling apparatus according to the present embodiment, cooling channels 100 and discharge channels 400 may be provided on both sides of the object to be cooled 10, respectively. That is, based on the object to be cooled 10, cooling channels 100 are respectively provided to contact the upper and lower surfaces of the object to be cooled 10, and again, the cooling channels 100 are provided with discharge channels 400, respectively. Can be. When this arrangement is made, the flow rate of the cooling medium 200 can be further increased to absorb more heat of the object to be cooled 10, so that the cooling efficiency can be increased.

In this embodiment, the process of discharging the bubble 210 captured through the trap 300 provided in the cooling channel 100 through the discharge channel 400 is the same as the first embodiment described above.

The above description of the present invention is for illustration only, and a person having ordinary knowledge in the technical field to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted to be included in the scope of the present invention.

10: object to be cooled
100: cooling channel
102: micro hole
200: cooling medium
210: bubble
300: trap
310: recess
320: Attach
350: Groove
400: discharge channel

Claims (10)

One side is in contact with the body to be cooled, the other side is a cooling channel in which micro holes are formed;
A cooling medium that moves inside the cooling channel and absorbs heat of the object to be cooled;
A trap provided inside the cooling channel and trapping bubbles generated while the cooling medium absorbs heat of the object to be cooled and changes phase; And
It is provided on the other side of the cooling channel, and includes a discharge channel that guides the bubbles trapped by the trap and introduced through the micro-hole to discharge,
The cooling medium is a phase change cooling device, characterized in that the phase change occurs from the liquid state to the gaseous state at a temperature range of heat generated from the object to be cooled. According to claim 1,
The trap is formed to extend in the height direction of the cooling channel, and is provided to be enlarged in a direction opposite to the moving direction of the cooling medium, to form a concave portion for capturing the moving bubbles, and to be formed in the moving direction of the cooling medium. Phase change cooling device, characterized in that it has an attachment. According to claim 2,
The trap is a phase change cooling device characterized in that it further has a groove formed in the height direction of the cooling channel on the rear facing the moving direction of the cooling medium. According to claim 2,
The fine hole is formed in the region corresponding to the recess of the trap phase change cooling device, characterized in that. According to claim 1,
The cooling channel is a phase change cooling device, characterized in that formed in such a way that the cross-sectional area becomes smaller toward the flow direction of the cooling medium. According to claim 1,
The discharge channel is a phase change cooling device characterized in that the cross-sectional area is formed to increase toward the flow direction of the cooling medium. A heat absorbing step of absorbing heat of the object to be cooled by moving a cooling medium inside a cooling channel in which one side is in contact with the object to be cooled and a micro hole is formed on the other side;
A bubble trapping step in which a trap provided inside the cooling channel traps bubbles generated while the cooling medium absorbs heat of the object to be cooled and changes phase; And
And a discharge step in which the discharge channel provided on the other side of the cooling channel is captured by the trap and the bubbles flowing through the micro hole are discharged.
In the heat absorption step, the cooling medium is a phase change cooling method characterized in that the phase change occurs in a liquid state to a gaseous state at a temperature range of heat generated in the object to be cooled. The method of claim 7,
The trap is formed to extend in the height direction of the cooling channel, and has a concave portion provided to be enlarged in a direction opposite to the moving direction of the cooling medium, and the bubbles generated and moved in the cooling channel are moved by the concave portion. A phase change cooling method characterized by being captured. The method of claim 8,
The bubble trapped by the concave portion is a phase change cooling method, characterized in that flowing into the discharge channel through the micro-hole formed in the region corresponding to the concave portion of the trap. The method of claim 8,
The trap is a phase change cooling method characterized in that it further has a groove formed in the height direction of the cooling channel on the rear facing the moving direction of the cooling medium.

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