TWI400421B - Heat exchanger structure - Google Patents

Description

Heat exchanger structure

The present invention relates to a heat exchanger, and more particularly to a heat exchanger structure that improves heat transfer efficiency.

With the advancement of electronic information technology, the use of electronic devices (such as computers, notebook computers, communication chassis, etc.) is becoming more and more popular and widely used; however, electronic components in electronic devices generate high-speed operation. Waste heat, if the waste heat is not discharged into the electronic equipment in time, it is easy to accumulate the waste heat in the electronic equipment, so that the temperature of the electronic components inside and inside the electronic equipment continues to rise, which causes the electronic components to malfunction and damage due to overheating. Or the operation efficiency is reduced.

In order to improve the above heat dissipation problem, it is generally common to install a cooling fan in the electronic device to force heat dissipation. However, due to the limited air flow of the cooling fan, the heat dissipation effect is difficult to be improved, and the cooling rate is also affected. In the limited case, the operator has sought another solution, that is, using a water-cooled heat sink directly attached to the heating element, such as (central processing unit (CPU), MPU, south, north bridge wafer, etc.), and by a pump The cooling liquid is introduced into the water-cooled heat sink in the water storage tank, and the cooling liquid is exchanged with the heat absorbed by the water-cooling heat sink from the heat-generating component, and then the cooling liquid is discharged from a water outlet of the water-cooling heat sink to the water outlet. A heat dissipation module is sent back to the water storage tank after cooling, so that the cooling liquid is circulated to help dissipate heat, and the temperature of the heating element is lowered, so that the heating element can operate smoothly.

However, although the water-cooling heat dissipating device can improve the problem of heat dissipation by using airflow, it extends another problem that the water-cooling heat dissipating device is close to the end surface of the heating element (ie, the heat absorbing surface) and is concentrated only at the same place. The relationship is such that only a lowermost fluid portion of the cooling liquid in the water-cooled device exchanges heat with the heat absorbing surface, and the cooling liquid stays in the water-cooling heat sink for too short a time, so that the cooling liquid has not yet absorbed enough The heat is quickly and quickly exported from the aforementioned water outlet, so that the water cooling function is greatly reduced, resulting in poor heat transfer effect, which makes the heat dissipation effect extremely inconspicuous.

As shown in FIG. 1 , the prior art discloses a water-cooled heat dissipating structure, which comprises a base 10 and a cover 11 . The cover 11 has an accommodating space 111 , an inlet pipe 112 and an outlet pipe 113 . The water inlet pipe 112 and the water outlet pipe 113 are respectively formed on opposite sides of the cover body 11 and communicate with the accommodating space 111, and the base 10 is covered with the cover body 11 and is mounted on the base 10. And a plurality of heat dissipating fins (fins) 13 are disposed in the accommodating space 111 of the cover 11 and form a plurality of unidirectional flow channels 131 therebetween, and respectively The inlet pipe 112 and the outlet pipe 113 correspond to each other. Therefore, after a cooling liquid is introduced into the accommodating space 111 from the inlet pipe 112, the cooling liquid is guided through the plurality of unidirectional channels 131 to cool the liquid and the fins. The sheet 13 is heat exchanged to effectively enhance the heat dissipation effect.

However, in the above heat dissipation structure, the heat dissipation fins 13 can be used to increase the heat dissipation area, so that when the cooling liquid flows through the plurality of unidirectional flow channels 131, the stagnation of the cooling liquid in the flow channels can be increased. Time to take more heat sources for heat exchange, but since the one-way flow passages 131 are formed at intervals of a plurality of fins, the frictional resistance of the fluid is increased, and the flow rate of the cooling fluid is low under the condition of constant pump power. The thermal convection coefficient is low and the high pressure loss coefficient is accompanied by the convective heat transfer of the cooling liquid from the fins 13. Therefore, the overall heat exchange efficiency and heat transfer effect are obviously poor, and the relative heat dissipation effect is not completed. ideal.

As described above, the prior art has the following disadvantages:

1. The cooling liquid is too short at the base, resulting in poor heat transfer effect;

2. The cooling liquid only contacts the heat source of the lower layer, and the heat transfer effect is not good;

3. The heat exchange efficiency is not good;

4. The heat dissipation effect is not good.

The reason is that in view of the shortcomings arising from the above-mentioned goods, the inventor of this case exhausted his mind, engaged in the industry's many years of experience, researched and innovated and improved, and finally successfully developed the "heat exchanger structure" case. It is actually an effect-enhancing creation.

Therefore, in order to solve the above disadvantages of the prior art, the main object of the present invention is to provide a heat exchanger structure having a spiral guiding groove design, which makes the spiral guiding groove improve heat transfer capability and thermal performance coefficient.

To achieve the above object, the present invention provides a heat exchanger structure including: a body having a center, and a spiral guiding groove extending radially from the center toward an outer side opposite the center, and The radial radius of rotation of the spiral guiding groove gradually increases from the center to the outside, and a first opening and a second opening respectively communicate with the spiral guiding groove, and the spiral guiding groove of the present invention can also be used. The design is such that it can enhance the mixing effect of a fluid flowing in the spiral guiding groove, and further effectively achieve an excellent heat transfer effect.

The invention further provides a heat exchanger structure, comprising: a body having a center, and a spiral guiding groove extending radially from the center toward an outer side opposite to the center, and the radial guiding of the spiral guiding groove The radius gradually increases from the center of the body to the outside, and a first port and a second port respectively communicate with the spiral guiding groove; and at least one first spoiler unit is disposed on the wall surface of the spiral guiding groove.

The spiral guiding groove according to the above embodiment of the present invention has an open side on one side of the body and a closed side on the other side, and includes at least one first cover body opposite to the open side, and covers the body to close The open side, and the first cover has at least one second spoiler unit corresponding to the open side of the spiral guide groove, and the first cover has a shaft tube communicating with the first port.

The spiral guiding groove according to the above embodiment of the present invention has an open side on each side of the body, and includes a first cover body and a second cover body respectively opposite to the two open sides, and covers the body to close The open side, and the first cover body and the second cover body respectively have at least one second spoiler unit and at least one third spoiler unit corresponding to an open side of the spiral guide groove.

The spiral guiding groove according to the above embodiment of the present invention has a first passage, the first passage is connected to the second opening, and the first passage communicates with the spiral guiding slot and the first through the second opening Pass.

The above object of the present invention, as well as its structural and functional features, will be described in accordance with the preferred embodiments of the drawings.

The present invention provides a heat exchanger structure, which is a preferred embodiment of the present invention. Referring to Figures 2, 3, 4, and 5, the present invention is a heat exchanger structure, which is the first preferred embodiment of the present invention. In an embodiment, the heat exchanger structure comprises a body 2 having a center 21 (indicated by a broken line axis in the figure), and a spiral guiding groove extending radially from the center 21 toward the outside of the center 21 22, and the radial radius of gyration of the spiral guiding groove 22 gradually increases from the outer side of the center 21, in other words, the spiral guiding groove 22 extends radially from the center 21 toward the inner side of the body 2, so that It forms a spiral curve (that is, the aforementioned spiral guide groove 22); as shown in Fig. 2, the spiral guide groove 22 integrally forms a form of a spiral.

In addition, the body further has a first opening 221 and a second opening 222. The first opening 221 is disposed at the center 21, and the second opening 222 is disposed outside the center 21, and the foregoing The first port 221 and the second port 222 respectively communicate with the spiral guiding groove 22.

The spiral guiding groove 22 has a first passage 225 disposed between the spiral guiding groove 22 and the second opening 222 and communicating with the second opening 222 to make a fluid ( For example, a cooling liquid, water) may flow from the second port 222 of the spiral guiding groove 22 and pass through a centrifugal force of a radial radius of rotation of the spiral guiding groove 22 to enhance the fluid mixing and pass through the first pass. The port 221 guides the aforementioned fluid out of a shaft tube 31.

That is, the fluid flows from the second port 222 through the first passage 225, and flows along the spiral curve (ie, the spiral guide groove 22) toward the first port 221, and the fluid at this time As the radius of gyration of the spiral curve gradually decreases toward the center 21, the fluid generates a three-dimensional secondary flow (Secondary Flow) due to the centrifugal force and the inertial force acting on the inner wall of the spiral guiding groove 22, that is, Dean The eddy current (Dean Vortics) occurs, that is, the flow field in the spiral guide groove 22 simultaneously has two symmetrical eddies (see Figures 4 and 5), which are shown by the arrows in Fig. 5. ) flows between the outer side wall 227 of the spiral guide groove 22 (the side away from the center 21) and the inner side inner side 228 (the side close to the center 21).

After the fluid flows through the first port 221, the shaft tube 31 is led out to a pump (not shown), and the pump returns the fluid to the second port 222. Therefore, the fluid is continuously circulated in the spiral guiding groove 22 and the pump to achieve an excellent water circulation heat dissipation effect.

In addition, the present invention mainly enhances the mixing of the fluid by the fluid flowing through the spiral guiding groove 22 by the secondary flow, so as to effectively improve the overall heat exchange efficiency, and the heat transfer effect is relatively improved.

Referring to FIGS. 2 and 3, the heat exchanger structure further includes at least one first cover 3, the first cover 3 is opposite to the body 2, and the first cover 3 has the aforementioned shaft tube. 31, the shaft tube 31 communicates with the first port 221, and the shaft tube 31 forms a through state with the first port 221 and the spiral guiding groove 22 and the second port 222; and the spiral guide The guiding groove 22 defines an open side 223 on the side of the body 2, and the open side 223 is opposite to a closed side 224, that is, the spiral guiding groove 22 penetrates through one side of the body 2, and the open side is formed on the through side. 223, and the other side of the body 2 is not penetrated by the helical guide groove 22, thus forming the closed side 224 opposite the open side 223.

The first cover body 3 closes the open side 223, that is, the first cover body 3 moves toward the corresponding open side 223, so that the first cover body 3 covers the body 2 and closes the open side. 223 to constitute the heat exchanger structure.

Moreover, the present invention is applied to heat dissipation to a heat source, especially an electronic component in an electronic device (such as a computer, a notebook computer, a communication case, or other industrial electronic device). The electrical energy generated by the operation is physically converted into heat energy. The side of the body 2 (that is, the end surface of the body 2 opposite to the open side 223) is heat-exchanged by the heat generated by the fluid in the spiral guiding groove 22 with respect to the heat source. Through the centrifugal force and the inertial force of the radial radius of gyration of the spiral guiding groove 22, the fluid in the spiral guiding groove 22 close to the heat source side (the temperature of the fluid on the side is higher) and the side away from the heat source side The fluid (the fluid on this side is relatively low in temperature) is rapidly mixed together to effectively increase the mixing effect of the fluid, and more effectively achieve the heat transfer effect of the excellent heat exchange (or increase the heat transfer efficiency of the fluid).

Referring to FIG. 6 , which is a second preferred embodiment of the present invention, the preferred embodiment is substantially the same as the first preferred embodiment, and is not further described herein. The difference between the two is: the aforementioned heat. The switch body structure further includes a second cover body 7 opposite to the first cover body 3 to cover both sides of the body 2, and the spiral guide groove 22 is respectively disposed on two sides of the body 2 An open side 223 is formed, and the corresponding open side 223 is closed by the first and second covers 3, 7 respectively.

Referring to Figures 7, 8, and 9, which are the third preferred embodiment of the present invention, the preferred embodiment is substantially the same as the first preferred embodiment, except that it further includes at least one first The spoiler unit 4 is disposed on the wall surface 226 of the spiral guiding groove 22. In the preferred embodiment, the first spoiler unit 4 is disposed on the closed side of the spiral guiding groove 22 224, and the first cover 3 has at least one second spoiler unit 5 at a position opposite to the open side 223 of the spiral guide groove 22, so in the preferred embodiment, the first spoiler unit 4 The two spoiler units 5 are respectively disposed on the closed side 224 and the open side 223 of the spiral guiding groove 22, and the first spoiler unit 4 and the second spoiler unit 5 are closed and disposed on the spiral guiding groove 22 Side 224 and open side 223.

Please also refer to the figures 5, 9, and 10, and the flow system in the heat exchanger can be selected to enter the first port 221 from the second port 222, or enter the second port 221. The port 222 flows out, and the description indicates that fluid enters from the second port 222 and flows out through the shaft tube 31 toward the first port 221 (as indicated by the arrow in FIG. 10), that is, the flow system is from the second port. The first passage 225 entering and flowing into the spiral guide groove 22 enters the radially-rotating spiral guide groove 22 when the fluid passes through the first passage 225, and proceeds to the center 21 of the body 2 along the spiral guide groove 22. The flow, due to the fluid flowing in the curved spiral guiding groove 22, causes the fluid to generate a three-dimensional secondary flow due to the inertial force and the centrifugal force, that is, the occurrence of Dean Vortices. That is, the flow field in the spiral guiding groove 22 simultaneously generates two symmetrical eddy currents in opposite directions, and the eddy current (shown by an arrow in FIG. 5) is on the outer side 227 of the spiral guiding groove 22 (a far from the center 21) The side flows between the side 228 and the side 228 (the side close to the center 21).

At the same time, the fluid in the spiral guiding groove 22 flows along the wall surface 226 and the spiral flow path of the first spoiler unit 4 and the second spoiler unit 5 on the first cover 3 in the spiral guiding groove 22 to A Swirling flow is generated in the spiral guiding groove 22 to increase the thermal convection coefficient of the convection field in the spiral guiding groove 22, and the first spoiler unit 4 and the second spoiler unit 5 are in the spiral guiding groove 22 The fluid is also caused to produce two symmetrical vortices that are opposite in direction of rotation, as shown by the arrows in Figure 5, on the outer side 227 of the helical guide groove 22 (on the side away from the center 21) and on the inner side 228 (near the center 21). Flowing between one side) to produce a heat transfer enhancement effect with increased turbulence intensity, and the eddy currents guided by the first spoiler unit 4 and the second spoiler unit 5 are in the same direction as the Dean vortices, so that The secondary flow caused by the first spoiler unit 4 and the second spoiler unit 5 can also enhance the eddy current intensity of the spiral curve and further improve the heat transfer effect of the heat exchanger.

As described above, the structure of the present invention provides fluid flow along the helical guide groove 22 and the first spoiler unit 4 and the second spoiler unit 5, and causes the fluid to generate Dean vortices, eddy currents. The increase in the strength of the laminar flow and the turbulent flow not only increases the number of fluid mixing in the spiral guide groove 22, but also increases the heat transfer capability and thermal coefficient of the fluid.

The fourth embodiment of the present invention is the same as the third preferred embodiment. The components and functions of the present invention are the same as those of the third preferred embodiment. The preferred embodiment is not described herein. Different from the third preferred embodiment, a spiral guiding groove 61 defines an open side 611, 612 on both sides of the body 2, a first cover 3 (same as the third preferred embodiment) and a first The two cover bodies 7 are respectively opposite to the two open sides 611 and 612, and correspondingly cover the body 2, thereby closing the two open sides 611 and 612. The first cover body 3 has a shaft tube 31 communicating with the first through port 221, and The cover body 3 and the second cover body 7 respectively have a second spoiler unit 5 and a third spoiler unit 8, which can also enhance the eddy current intensity of the spiral curve and further improve the heat transfer effect of the heat exchanger.

Referring to Figures 13 and 14, the fifth preferred embodiment of the present invention is the same as the third preferred embodiment, and the same components are not described herein. The difference from the third preferred embodiment is that the first spoiler unit 4 and the second spoiler unit 5 are disposed in a groove form on the closed side 224 and the open side 223 of the spiral guiding groove 22, so that the fluid can be The secondary flow caused by the first spoiler unit 4 and the second spoiler unit 5 can also enhance the eddy current intensity of the spiral curve, thereby improving the heat transfer effect of the heat exchanger.

In summary, the "heat exchanger structure" provided by the present invention does meet the requirements for granting patents, and the patent application is filed according to law, praying for the patent, which is actually a prayer.

It is to be understood that the above-described methods, shapes, configurations, and devices of the present invention are intended to be included within the scope of the present invention.

2. . . Ontology

twenty one. . . center

twenty two. . . Spiral guide groove

221. . . First port

222. . . Second port

223. . . Open side

224. . . Closed side

225. . . First channel

226. . . Wall

227. . . Outside

228. . . Inside

3. . . First cover

31. . . Shaft tube

4. . . First spoiler unit

5. . . Second spoiler unit

61. . . Spiral guide groove

611, 612. . . Open side

7. . . Second cover

8. . . Third spoiler unit

Figure 1 is a schematic exploded view of a conventional water-cooled heat dissipation structure;

Figure 2 is an exploded perspective view of a first preferred embodiment of the present invention;

Figure 3 is a schematic view showing the combination of the first preferred embodiment of the present invention;

Figure 4 is a partial perspective perspective view of the spiral guiding groove of the first preferred embodiment of the present invention;

Figure 5 is a schematic diagram showing the Dean vortex generated by the cross-section fluid of Figure 4;

Figure 6 is an exploded perspective view of a second preferred embodiment of the present invention;

Figure 7 is a perspective exploded view of a third preferred embodiment of the present invention;

Figure 8 is a perspective view of a third preferred embodiment of the present invention;

Figure 9 is a perspective cross-sectional view showing a third preferred embodiment of the present invention;

Figure 10 is a schematic view showing the implementation of a third preferred embodiment of the present invention;

Figure 11 is a perspective exploded view of a fourth preferred embodiment of the present invention;

Figure 12 is a perspective cross-sectional view showing a fourth preferred embodiment of the present invention;

Figure 13 is a perspective exploded view of a fifth preferred embodiment of the present invention;

Figure 14 is a perspective cross-sectional view showing a fifth preferred embodiment of the present invention.

2. . . Ontology

twenty one. . . center

twenty two. . . Spiral guide groove

221. . . First port

222. . . Second port

223. . . Open side

224. . . Closed side

225. . . First channel

3. . . First cover

31. . . Shaft tube

Claims (16)

A heat exchanger structure comprising: a body having a center, and a spiral guiding groove extending from the center to have a radius of curvature change radially extending toward an outer side opposite the center, and a radial rotation of the spiral guiding groove The radius gradually increases from the center of the body to the outside, and a first port and a second port respectively communicate with the spiral guiding groove, so that the flow field in the spiral guiding groove simultaneously has two symmetrical eddy currents in opposite directions; And at least one first spoiler unit is disposed on the wall surface of the spiral guiding groove and radially disposed along the spiral guiding groove to cause the fluid to generate two symmetrical eddy currents with opposite directions of rotation. The heat exchanger structure of claim 1, wherein the first spoiler unit is a convex body. The heat exchanger structure of claim 1, wherein the first spoiler unit is a groove. The heat exchanger structure of claim 1, wherein the spiral guiding groove has an open side on one side of the body and a closed side on the other side. The heat exchanger structure of claim 1, wherein the spiral guiding groove has a first passage communicating with the second opening. The heat exchanger structure of claim 4, further comprising at least one first cover opposite to the open side, and covering the body to close the open side, and the first cover has a shaft tube communicating with the first pass mouth. The heat exchanger structure of claim 6, wherein the first cover has at least one second spoiler unit corresponding to an open side of the spiral guide groove. The heat exchanger structure of claim 7, wherein the second spoiler unit is a convex body. The heat exchanger structure of claim 7, wherein the second spoiler unit is a groove. The heat exchanger structure of claim 1, wherein the spiral guiding groove forms an open side on each side of the body. The heat exchanger structure according to claim 10, further comprising a first cover body and a second cover body respectively opposite to the two open sides, and covering the body to close the open side. The heat exchanger structure of claim 11, wherein the first cover and the second cover respectively have at least one second spoiler unit and at least one third spoiler unit corresponding to an open side of the spiral guide groove. The heat exchanger structure of claim 12, wherein the second spoiler unit and the third spoiler unit are convex. The heat exchanger structure of claim 12, wherein the second spoiler unit and the third spoiler unit are grooves. The heat exchanger structure of claim 12, wherein the first spoiler unit is a convex body and the third spoiler unit is a groove. The heat exchanger structure of claim 12, wherein the first spoiler unit is a groove and the third spoiler unit is a protrusion.