JP2007123736A - Radiator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat radiation structure of a radiator with a water path and a radiating fin formed in it by laminating a heat receiving element capable of effectively radiating a heat with a low pressure-loss, and capable of satisfactorily removing the heat from a heating element even though without using a large cooling-water circulation device. <P>SOLUTION: A plurality of a first to fifth plate-like heat receiving elements for receiving the heat are laminated and bonded, the water path of the cooling-water for cooling the heating elements 99 bonded on the surface of its top layer is guided from a water supply outlet of the undermost layer 11 and then passing through the layers 11 to 15 lying below part 7 of the heating elements 99, comb-shaped heat radiating fins 2, 3 are formed below it between fins with the water path, and a communicating hole is formed for communicating the water path between fins with the water path connecting to the water supply outlet and a water discharge outlet in an up-and-down direction. Each fin 2h, 2i, 2j, 4i, 4j, 4k of the heat radiating fins is formed in a step state out of alignment at the predetermined pitch in the fin adjacent direction as shown by the 2i and 2j, and 4j and 4k at the position of an approximate half of the thickness of the layer with the radiating fins formed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a water-cooled radiator that is applied to a device that generates high heat, such as a high-power LD (laser diode) array.

As a conventional technique of this type, for example, there is a five-layer heat radiator for a high-power LD array shown in FIGS.
FIG. 19A is a perspective view showing the entire structure of a conventional radiator 100, and FIG. 19B is a cross-sectional view of the radiator 100 in FIG. 19A cut along the J1-J2 line in the vertical direction.
FIG. 20 is a perspective view showing the structure of the first (first layer) heat receiving body 1 of the radiator 100.

FIG. 21 is a perspective view showing the structure of the second (second layer) heat receiving body 2 of the radiator 100.
FIG. 22 is a perspective view showing the structure of the third (third layer) heat receiving body 3 of the radiator 100.
FIG. 23 is a perspective view showing the structure of the fourth (fourth layer) heat receiving body 4 of the radiator 100.
FIG. 24 is a perspective view showing the structure of the fifth (fifth layer) heat receiving body 5 of the radiator 100.
FIG. 25 is a perspective view showing a structure in which the second heat receiving body 2 is stacked on the first heat receiving body 1.

FIG. 26 is a perspective view showing a structure in which the first to third heat receiving bodies 1 to 3 are sequentially laminated.
FIG. 27A is a perspective view showing a structure in which the first to fourth heat receiving bodies 1 to 4 are sequentially laminated, and FIG. 27B is a diagram in which a fifth heat receiving body 5 is further laminated on the structure of FIG. It is sectional drawing when the structure which fixed the array 99 was cut | disconnected by the I1-I2 line at the horizontal direction.
Since the high-power LD array 99 has a large heat generation density of about several tens to several hundreds W / cm ² , the laser output, efficiency, transmission wavelength, and element lifetime are greatly affected by the temperature rise of the LD array 99. Therefore, how to remove the heat generated in the LD array 99 is a very important issue.

In addition, since the LD array 99 has a length of about 10 mm × width of about 1 to 1.5 mm and a contact area with the heat receiving body 105 is very small, the temperature rise cannot be suppressed by the air-cooling type. In 100, a water channel is provided inside to perform water-cooled heat dissipation.
The water channel of the radiator 100 is usually made of copper, aluminum or the like having good heat conduction, and the water channel is generally formed by chemical etching or precision press.

Therefore, the radiator 100 includes a circular through-hole 1c, 2c, 3c, 4c, 5c serving as a water supply port in each of the first and fifth heat receiving bodies 1 to 5 each having a rectangular shape and a drain. Circular through-holes 1b, 2b, 3b, 4b, and 5b serving as the mouth out are provided and sequentially laminated from the first layer to the fifth layer, and the heat receiving bodies 1 to 5 are airtight and thermally bonded. Configured.
Moreover, 1a, 2a, 3a, 4a, 5a of the 1st-5th heat receiving bodies 1-5 are circular through-holes, and are used when fixing a radiator with a screw etc. Although not shown in the perspective view, as shown in the cross-sectional view, an LD array 99 is mounted and fixed on the distal end portion 7 of the radiator 100.

Further, since the radiator 100 is formed by penetrating the holes as described above without half-etching the water channel in the plate material, ribs (for example, 2e, 3e, and 4f) are used for the portion having a large water channel area. The road area and the strength of the radiator 100 are ensured.
Further, the water supply and drain outlet periphery of the radiator 100 is hermetically sealed by packing or the like, but at this time, ribs (for example, so as not to cause cooling water leakage due to deformation of the plate material due to the force when crushing the packing) 2e and 2k shown in FIG. 21 and 3g and 3h) shown in FIG. 22 are provided to ensure rigidity.
The rib 4e of the 4th heat receiving body 4 shown in FIG. 23 becomes a part which accommodates the sealing material at the time of stacking | stacking the heat radiator 100, and has enlarged the area. The fifth heat receiving body 5 shown in FIG. 24 is the uppermost layer, and an LD array 99 is mounted on the tip 7 on the upper surface thereof as shown in FIG. 19B. The circular openings 5c and 5b serve as a guide when the sealing material is stored.

Next, the heat radiation operation by the heat radiator 100 having such a structure will be described.
As shown in FIG. 25 from a cooling water circulation device (pump) (not shown), the cooling water led to the water inlet in of the radiator 100 reaches the water inlet 2c of the second heat receiving body 2. Since this cooling water has the rib 2k, the cooling water flows in from the opening 3y provided in the upper third heat receiving body 3 shown in FIG. 26 and reaches the space 2g of the second lower heat receiving body 2 again. . Further, this cooling water passes through 2v between the radiation fins 2m and reaches the end while undergoing heat exchange.

  Thereafter, the cooling water passes through the communication holes 3k provided in the upper third heat receiving body 3, and passes through the heat radiation fins 4h 4i of the fourth heat receiving body 4 shown in FIG. 27 in the direction opposite to the third layer. It is guided to the space 4d while being subjected to heat exchange. Here, the cooling water is blocked by the ribs 4f, and flows from the space 4d into the space portions 3d and 2d provided in the second and third heat receiving bodies 2 and 3 shown in FIG. The flowing cooling water is once blocked by the ribs 3e and 2e and flows into the space 5d of the upper fifth heat receiving body 5.

The cooling water goes to the drain outlet out while repeating such an operation. Here, since the flow is blocked by the rib 2e of the second heat receiving body 2 immediately before the drain outlet out, the cooling water once rises and passes through the space 3z of the third heat receiving body 3, and the drain outlet out More discharged to the outside.
Examples of this type of conventional radiator include those described in Patent Document 1 and Patent Document 2, for example.
WO00 / 11922 Japanese Patent Laid-Open No. 8-139479

  As described above, in the conventional radiator 100, the heat generated in the LD array 99 is directly conducted to the uppermost heat receiving body 5, and the heat radiation fins 4 h provided on the lower fourth heat receiving body 4 are used. Heat can be removed efficiently. However, there is a limit to increase the number of mounted heat sink fins 4h due to manufacturing restrictions, and there is a problem that heat cannot be removed sufficiently when the high-power LD array 99 is mounted. .

Moreover, in the heat radiator 100, since the water channel is formed by penetrating the plate-like member, the vicinity of the water supply / drainage port becomes weak in strength. In order to compensate for this, the ribs 2k and 2e are formed to ensure the strength of the sealing material. However, the ribs 2k and 2e reduce the cross-sectional area of the flow path, and there is a problem that the pressure loss becomes significantly large when cooling water flows in or drains.
Further, with respect to the pressure loss, when cooling water flows into the radiator 100 from the water supply port in having a large flow path cross-sectional area, the pressure loss increases due to a rapid reduction of the flow cross-sectional area. Conversely, when the cooling water flows out to the drain outlet out, the pressure loss increases due to the rapid expansion of the cross-sectional area of the flow path. As an adverse effect of the increased pressure loss, there is a problem that the load of the cooling water circulation device (pump) becomes large and the device must be enlarged.

  The present invention has been made in view of such a problem, and is a heat dissipation structure in which a heat receiving body is laminated and a water channel and a heat dissipation fin are formed therein. It aims at providing the heat radiator which can fully remove the heat | fever of a heat generating body, without using a water circulation apparatus.

In order to achieve the above object, a radiator according to claim 1 of the present invention is a cooling for cooling a heating element in which a plurality of plate-like heat receiving bodies for receiving heat are stacked and bonded together and bonded to the surface of the uppermost layer. A water channel is formed after being led from the lowermost water supply port, passing through the lower layer of the heating element to the drain port, and comb-shaped radiating fins below the channel between the fins In the radiator that is formed with the communication hole formed in the vertical direction to connect the water channel between the fins and the water channel connected to the water supply port or the drain port, each of the fins of the heat dissipation fin is formed with the heat dissipation fin. It is characterized in that it is formed in a stepped state shifted by a predetermined pitch in the fin adjacent direction at a position approximately half the thickness of the layer.
According to this configuration, since the fins of the heat radiating fins are formed in a stepped state shifted by a predetermined pitch, the surface area of the fin itself is enlarged, and the heat radiating area is increased accordingly, so that the heat radiating efficiency is improved. As a result, the cooling water flowing between the radiating fins efficiently cools the heat of the heating element.

A radiator according to a second aspect of the present invention is the radiator according to the first aspect, wherein the inner wall of the communication hole is positioned in the same direction as the fin adjacent direction at a position approximately half the thickness of the layer in which the communication hole is formed. It is characterized by being formed in a stepped state shifted by a predetermined pitch.
According to this configuration, the inner wall of the communication hole is formed in a stepped state shifted by a predetermined pitch in the same direction as the fin adjacent direction, that is, in a state shifted in a stepped shape in a direction perpendicular to the vertical direction through which the cooling water passes. A vertical plane in the vertical direction and a horizontal plane perpendicular to the vertical plane are formed on the inner wall. For this reason, since the cooling water collides with the horizontal plane when the communication hole moves upward in the direction where the heating element is located, turbulent flow is generated, so that the heat transfer coefficient is greatly improved.

According to a third aspect of the present invention, the radiator according to the first or second aspect is characterized in that the stepped state shifted by the predetermined pitch is formed by etching away from the upper and lower surfaces of the layer by etching.
According to this configuration, the step-like deviation of the inner wall of the radiating fin or the communication hole can be easily realized by a normal double-sided etching method, so that it can be realized at low cost.

A radiator according to a fourth aspect of the present invention is the radiator according to any one of the first to third aspects, wherein the layer in which the radiation fin is formed is disposed above and below the layer in which the communication hole is formed. In the case of a layer structure in which water paths between the fins of the upper and lower radiating fins communicate with each other through the communication hole, each fin of the upper and lower radiating fins is formed in a stepped state shifted by the predetermined pitch. .
According to this configuration, since the fins formed in the stepped state in which the fins are shifted by a predetermined pitch are further disposed below the heating element, the surface area of the fins is further expanded, and the heat dissipation area is further expanded accordingly. Therefore, the heat dissipation efficiency is further improved. Thereby, the cooling water that has flowed in between the radiating fins cools the heat of the heating element more efficiently.

According to a fifth aspect of the present invention, there is provided a radiator according to the fourth aspect, wherein the cross-sectional shape of the layer portion of the radiating fin sandwiching the communication hole is zigzag in the layer structure in which the radiating fin is arranged above and below the communication hole. It is formed in the level | step difference state of this.
According to this configuration, since the cooling water passages in the vertical direction are zigzag, the turbulence of the cooling water is promoted, and the cooling performance can be further improved.

Further, a radiator according to claim 6 of the present invention is laminated on the lowermost layer where the water supply port is formed in any one of claims 1 to 5, and in the layer where the radiation fin is formed, An annular rib combined with the water supply port is expanded concentrically from the center of the water supply port, and this enlargement causes the rib to have a predetermined peripheral surface with respect to the peripheral surface of the water supply port when stacked on the lowermost layer. The width is exposed and combined in a stepped state so that the exposed surface becomes a water channel, and a plurality of protrusions are provided on the enlarged rib at predetermined intervals, and the communication holes are formed on the formation layer of these protrusions. When the layers formed are stacked, the recesses between the plurality of protrusions become water channels.
According to this configuration, since the water channel from the water supply port to the heat radiating fin has a gradually reduced shape, there is no sudden reduction in the flow path cross-sectional area, and pressure loss can be reduced. Further, the processing of the heat receiving body in the layer in which the heat radiating fin is formed can be easily performed by the etching mask in the same manner as the heat radiating fin, so that the cost is not increased.

  A radiator according to claim 7 of the present invention is laminated on the lowermost layer in which the drainage port is formed in any one of claims 1 to 6, and in the layer in which the radiation fin is formed, An annular rib combined with the drain port is expanded concentrically from the center of the drain port, and this enlargement causes the rib to have a predetermined peripheral surface with respect to the peripheral surface of the drain port when stacked on the lowermost layer. The width is exposed and combined in a stepped state so that the exposed surface becomes a water channel, and a plurality of convex portions are provided at predetermined intervals on the enlarged rib, and the communication hole is formed on the formation layer of these convex portions. When the layers formed are stacked, the recesses between the plurality of protrusions become water channels.

  According to this configuration, since the water channel extending from the upper fin of the communication hole to the drain outlet is gradually expanded, the channel cross-sectional area is not rapidly expanded, and the pressure loss can be reduced. In addition, when the characteristic structure of the present invention is applied to both the water supply port and the drain port, the channel cross-sectional area gradually decreases from the water supply port, and the channel cross-sectional area gradually increases to the drain port. The pressure loss can be greatly reduced. Therefore, it is possible to sufficiently supply the cooling water with a small cooling water circulation device.

  As described above, according to the present invention, a heat radiating structure in which heat receiving bodies are stacked and water passages and heat radiating fins are formed therein, has a low heat loss and a high heat radiating effect, and without using a large cooling water circulation device. There is an effect that the heat of the heating element can be sufficiently removed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, parts corresponding to each other in all the drawings in this specification are denoted by the same reference numerals, and description of the overlapping parts will be omitted as appropriate.
(First embodiment)
FIG. 1 is a perspective view showing the overall structure of a heat radiator 10 having a five-layer structure according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing the structure of the first (first layer) heat receiving body 11 of the radiator 10.
FIG. 3 is a perspective view showing the structure of the second (second layer) heat receiving body 12 of the radiator 10.

4A is an enlarged view of the A frame line portion of the second heat receiving body 12 shown in FIG. 3, and FIG. 4B is a view when the radiating fin portion of FIG. It is sectional drawing.
FIG. 5 is a perspective view showing the structure of the third (third layer) heat receiving body 13 of the radiator 10.
6A is an enlarged view of the C frame line portion of the third heat receiving body 13 shown in FIG. 5, and FIG. 6B is a cross-sectional view taken along line D1-D2 in the horizontal direction of FIG. It is sectional drawing.
FIG. 7 is a perspective view showing the structure of the fourth (fourth layer) heat receiving body 14 of the radiator 10.
FIG. 8A is an enlarged view of the E frame line portion of the fourth heat receiving body 14 shown in FIG. 7, and FIG. 8B is a view when the radiating fin portion of FIG. It is sectional drawing.

FIG. 9 is a perspective view showing the structure of the fifth (fifth layer) heat receiving body 15 of the radiator 10.
FIG. 10 is a perspective view showing a structure in which the second heat receiving body 12 is laminated on the first heat receiving body 11.
FIG. 11 is a perspective view showing a structure in which first to third heat receiving bodies 11 to 13 are sequentially laminated.
FIG. 12 is a perspective view showing a structure in which the first to fourth heat receiving bodies 11 to 14 are sequentially laminated.
FIG. 13 is a cross-sectional view when the heat radiator 10 shown in FIG. 1 is cut in the horizontal direction along line G1-G2.

14A is an enlarged view of the H frame line portion at the tip 7 of the radiator 10 shown in FIG. 13, and FIG. 14B is a cross-sectional view showing the flow of cooling water at the tip 7 of FIG.
15A is an enlarged view of the H frame line portion at the tip 7 of the radiator 10 shown in FIG. 13, and FIG. 15B is a diagram in which the third heat receiving body 13 shown in FIG. It is sectional drawing of a structure.

The heat radiator 10 of the first embodiment is different from the conventional heat radiator 100 in that the heat radiation fins 2h, 2i, 2j of the second heat receiving body 12 have the thickness as shown by 2p, 2q in FIG. Formed in a stepped state slightly shifted from a value greater than 0 to about ½ pitch in the adjacent direction at a half position (hereinafter referred to as a stepped state shifted by a predetermined pitch), and indicated by 3p and 3q in FIG. In this way, the inner wall of the communication hole 3k of the third heat receiving body 13 is formed in a stepped state shifted by a predetermined pitch as in the case of the heat radiating fins 2h, 2i, 2j. Further, as shown by 4p, 4q in FIG. This is because the radiating fins 4i, 4j, 4k of the fourth heat receiving body 14 are formed in a stepped state shifted by a predetermined pitch in the same manner as the communication holes 3k.
In the method of forming the stepped state deviated by a predetermined pitch, etching is performed from the upper and lower surfaces of each of the heat receiving bodies 12, 13, 14 to 1/2 of the plate thickness by chemical etching.

Next, the heat radiation operation by the heat radiator 10 having such a structure will be described.
As shown in FIG. 10 from a cooling water circulation device (pump) (not shown), the cooling water led to the water inlet in of the radiator 10 gets over the rib 2k of the second heat receiving body 12 and reaches the space 2g to radiate heat. It flows into 2 l between the fins.
Here, as shown in FIG. 14, since the radiation fins 2h, 2i, 2j are formed in a stepped state shifted by a predetermined pitch, the heat radiation area is expanded by the horizontal portions 2p, 2q at the shifted positions, thereby radiating heat. Efficiency has improved. For this reason, the cooling water that has flowed into the space between the radiating fins 21 efficiently cools the heat, and flows into the communication hole 3k of the third heat receiving body 13 while changing the flow upward.

Since the inflowing cooling water collides with the horizontal portion 3p of the communication hole 3k, a turbulent flow is generated here. For this reason, the heat transfer coefficient is also greatly improved. That is, the cooling water that has flowed into the communication hole 3k in this way has a greatly improved heat transfer rate due to the expansion of the heat radiation area by the horizontal portions 3p and 3q and the turbulent flow caused by the collision with the horizontal portion 3p.
Further, the cooling water reaches between the heat radiation fins 4l of the fourth heat receiving body 14 from the communication hole 3k, and at this time, it collides with the horizontal portion 4q to generate turbulent flow, so that the heat transfer rate is greatly improved. Thereafter, when passing through the heat radiation fins 4i, 4j, 4k, the heat radiation area is increased by the horizontal portions 4p, 4q, so that the heat radiation efficiency is also greatly improved here.

As described above, according to the radiator 10 of the first embodiment, the heat transfer efficiency can be significantly improved by turbulent cooling water and expansion of the surface area of the radiating fin, and the heat generated in the LD array 99 can be cooled well. . In other words, since the cooling performance of the radiator 10 is remarkably improved, the temperature rise of the LD array 99 can be appropriately suppressed.
In addition, when the first to fifth heat receiving bodies 11 to 15 are formed, if one having a single-sided etching mask pattern with a pitch shifted in advance is prepared, the subsequent simple fabrication by a normal double-sided etching method. It becomes possible. That is, there is no factor that increases the cost.
In addition, in the structure of the radiator 10 shown in FIG. 15A, if the third heat receiving body 13 is arranged upside down as shown in FIG. 15B, the vertical cooling water passage is zigzag-shaped. Therefore, the turbulent flow of the cooling water is promoted, and the cooling performance can be further improved.

(Second Embodiment)
The radiator of the second embodiment of the present invention is different from the radiator 10 of the first embodiment in that the structure of the second heat receiving body 22 is changed as shown in FIG. . That is, when the ribs 22e and 22g of the second heat receiving body 22 are concentrically enlarged from the center of the water supply / drain port, the first heat receiving body 11 is laminated when it is laminated as shown in FIG. The space portions 22h and 22i are formed.

Further, by providing rib convex portions 22d and 22f on the second heat receiving body 22, concave portions 22e and 22g are formed between the convex portions, and these concave portions become the second space portions 22e and 22g, as shown in FIG. In addition, when the third heat receiving body 13 is stacked, the space portions 3y and 3z of the heat receiving body 13 and the second space portions 22e and 22g are combined to gradually reduce or enlarge the flow path area. .
The rib convex portions 22d and 22f serve as reinforcing portions, which are formed by half etching about half of the plate thickness.

In the radiator of the second embodiment having such a configuration, the cooling water led from the water supply port in flows into the first space 22h. At this time, since the first space portions 22h and 22i are wider than the water supply port, there is no rapid reduction in the flow path cross-sectional area. For this reason, increase of the pressure loss at the time of cooling water flowing in into the 1st space part 22h from the water supply opening in is suppressed.
Next, although the cooling water passes through the rib 22g, the flow path cross-sectional area is reduced by the second space 22g by the rib convex portion 22f, so that an increase in pressure loss is suppressed.

  Since the flow of the cooling water after this is the same as that described above, it is omitted. The cooling water finally reaches the drain outlet out. At this time, the space portion 3z and the second space portion 22e of the third heat receiving body 13 are combined, and the cooling water continuously flows in the flow direction. Since one space portion 22i exists, the flow path step area gradually increases, and thereby the increase in the pressure loss of the cooling water is greatly suppressed.

Thus, according to the radiator of the second embodiment, the flow passage cross-sectional area is gradually reduced from the water supply port in, and the flow passage cross-sectional area is gradually increased to the drain port out. There is no sudden reduction or rapid expansion of the cross-sectional area of the channel as in the prior art. For this reason, a pressure loss can be reduced significantly. Therefore, even if a large cooling water circulation device is not used as in the prior art, in other words, it is possible to sufficiently supply the cooling water with a small cooling water circulation device.
Further, when the second heat receiving member 22 is formed, the cost is not increased because the etching can be easily performed by the etching mask in the same manner as the heat radiation fin in the first embodiment.

It is a perspective view which shows the whole structure of the heat radiator of the 5 layer structure which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the structure of the 1st (1st layer) heat receiving body of the heat radiator which concerns on 1st Embodiment. It is a perspective view which shows the structure of the 2nd (2nd layer) heat receiving body of the heat radiator which concerns on 1st Embodiment. (A) is an enlarged view of A frame line part of the 2nd heat receiving body shown in FIG. 3, (b) is sectional drawing when the radiation fin part of (a) is cut | disconnected by B1-B2 line at a horizontal direction. is there. It is a perspective view which shows the structure of the 3rd (3rd layer) heat receiving body of the heat radiator which concerns on 1st Embodiment. (A) is an enlarged view of the C frame line portion of the third heat receiving body shown in FIG. 5, (b) is a cross-sectional view when the in-line portion of (a) is cut in the horizontal direction along the D1-D2 line. is there. It is a perspective view which shows the structure of the 4th (4th layer) heat receiving body of the heat radiator which concerns on 1st Embodiment. (A) is an enlarged view of E frame line part of the 4th heat receiving body shown in FIG. 7, (b) is sectional drawing when the radiation fin part of (a) is cut | disconnected by F1-F2 line in the horizontal direction. is there. It is a perspective view which shows the structure of the 5th (5th layer) heat receiving body of the heat radiator which concerns on 1st Embodiment. It is a perspective view which shows the structure which laminated | stacked the 2nd heat receiving body on the 1st heat receiving body of the heat radiator which concerns on 1st Embodiment. It is a perspective view which shows the structure which laminated | stacked the 1st-3rd heat receiving body of the heat radiator which concerns on 1st Embodiment sequentially. It is a perspective view which shows the structure which laminated | stacked the 1st-4th heat receiving body of the heat radiator which concerns on 1st Embodiment sequentially. It is sectional drawing when the heat radiator shown in FIG. 1 is cut | disconnected by the G1-G2 line at the horizontal direction. FIG. 14B is an enlarged view of the H frame line at the tip of the radiator shown in FIG. 13, and FIG. FIG. 14B is an enlarged view of the H frame line portion at the tip of the radiator shown in FIG. 13, and FIG. 14B is a cross-sectional view of a configuration in which the third heat receiving body shown in FIG. It is a perspective view which shows the structure of the 2nd heat receiving body in the heat radiator of the 5-layer structure which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the structure which laminated | stacked the 2nd heat receiving body on the 1st heat receiving body of the heat radiator which concerns on 2nd Embodiment. It is a perspective view which shows the structure which laminated | stacked the 1st-3rd heat receiving body of the heat radiator which concerns on 2nd Embodiment sequentially. The perspective view which shows the whole structure of the conventional heat radiator, (b) is sectional drawing when the heat radiator of (a) is cut | disconnected longitudinally by the J1-J2 line. It is a perspective view which shows the structure of the 1st (1st layer) heat receiving body of the conventional heat radiator. It is a perspective view which shows the structure of the 2nd (2nd layer) heat receiving body of the conventional heat radiator. It is a perspective view which shows the structure of the 3rd (3rd layer) heat receiving body of the conventional heat radiator. It is a perspective view which shows the structure of the 4th (4th layer) heat receiving body of the conventional heat radiator. It is a perspective view which shows the structure of the 5th (5th layer) heat receiving body of the conventional heat radiator. It is a perspective view which shows the structure which laminated | stacked the 2nd heat receiving body on the 1st heat receiving body 1 of the conventional heat radiator. It is a perspective view which shows the structure which laminated | stacked the 1st-3rd heat receiving body of the conventional heat radiator sequentially. (A) is a perspective view which shows the structure which laminated | stacked the 1st-4th heat receiving body of the conventional heat radiator one by one, (b) is further laminated | stacked on the structure of (a), and a LD array It is sectional drawing at the time of cut | disconnecting the structure which fixed this to the horizontal direction by I1-I2 line.

Explanation of symbols

1a to 5a, 1b to 5b, 1c to 5c, 2d, 2g Through-hole 2e, 3e, 2f, 2k, 3e, 3f, 3g, 4e, 4f, 4g Rib 2h, 2i, 2j, 4i, 4j, 4k 2p, 2q, 3p, 3q Horizontal portion 3k Communication hole 3y, 3z Space portion 2l, 4l Between radiating fins 7 Radiator tip 10 Radiator 11 First heat receiving element 12, 22 Second heat receiving element 13 Third Heat receiving body 14 4th heat receiving body 15 5th heat receiving body 22d, 22f Rib convex part 22e, 22g Rib recessed part (2nd space part)
22h, 22i first space 99 LD array

Claims (7)

A plurality of plate-shaped heat receiving bodies that receive heat are laminated and joined, and the cooling water channel for cooling the heating element joined to the surface of the uppermost layer is led from the water inlet of the lowermost layer, and then below the heating element A water channel that is formed to communicate with the drainage port through the layer, and that has a comb-like radiating fin with a water channel between the fins, and that leads to the water channel between the fins and the water supply or drainage port. In a radiator in which a communication hole that communicates with each other in the vertical direction is formed,
Each radiator fin is formed in a stepped state shifted by a predetermined pitch in the fin adjacent direction at a position approximately half the thickness of the layer on which the radiator fin is formed. The inner wall of the communication hole is formed in a stepped state shifted by a predetermined pitch in the same direction as the fin adjacent direction at a position approximately half the thickness of the layer in which the communication hole is formed. The radiator described. The radiator according to claim 1 or 2, wherein the stepped state shifted by a predetermined pitch is formed by etching away from the upper and lower surfaces of the layer. In the case of the layer structure in which the layer in which the radiating fin is formed is disposed above and below the layer in which the communication hole is formed, and the water channel between the fins of the upper and lower radiating fins is communicated by the communication hole, 4. The radiator according to claim 1, wherein each of the fins is formed in a stepped state shifted by the predetermined pitch. 5. The cross-sectional shape of the layer part of the radiation fin which pinched | interposed the said communicating hole is formed in the zigzag level | step difference state in the layer structure where the radiation fin was arrange | positioned at the upper and lower sides of the said communicating hole. Heatsink. By laminating on the lowermost layer where the water supply port is formed and in the layer where the radiation fin is formed, an annular rib combined with the water supply port is expanded concentrically from the center of the water supply port, and by this expansion When the rib is laminated on the lowermost layer, the peripheral surface is exposed to a predetermined width with respect to the peripheral surface of the water supply port and is combined in a stepped state, and the exposed surface becomes a water channel, and the enlarged When a plurality of convex portions are provided on the ribs at predetermined intervals, and the layer in which the communication holes are formed is laminated on the formation layer of the convex portions, the concave portions between the plurality of convex portions become water channels. The radiator according to any one of claims 1 to 5, wherein By laminating on the lowermost layer where the drainage port is formed and in the layer where the radiation fin is formed, an annular rib combined with the drainage port is expanded concentrically from the center of the drainage port, When the rib is laminated on the lowermost layer, the peripheral surface is exposed to a predetermined width with respect to the peripheral surface of the drain outlet and is combined in a stepped state so that the exposed surface becomes a water channel, and the enlarged When a plurality of convex portions are provided on the ribs at predetermined intervals, and the layer in which the communication holes are formed is laminated on the formation layer of the convex portions, the concave portions between the plurality of convex portions become water channels. The radiator according to any one of claims 1 to 6, wherein the radiator is any one of the above.

Images