Heat sink and laser

Abstract

The utility model provides a heat sink and a laser, and relates to the technical field of lasers. The top surface of the heat sink forms a heat sink, and a heat sink is provided inside the heat sink, and the heat sink is located below the heat sink; a liquid inlet channel and a liquid return channel are also provided inside the heat sink; the liquid inlet channel includes a liquid outlet connected to the heat sink, and a liquid inlet connected to the bottom surface of the heat sink; the liquid return channel includes a liquid return port connected to the heat sink, and a liquid discharge port connected to the bottom surface of the heat sink; a liquid inlet joint coaxially connected to the liquid inlet is provided on the bottom surface of the heat sink; a liquid return joint coaxially connected to the liquid discharge port is provided on the bottom surface of the heat sink; from top to bottom, a line connecting the center of the liquid outlet and the center of the liquid inlet is inclined toward the circumferential inner side of the heat sink, and a line connecting the center of the liquid return port and the center of the liquid discharge port is inclined toward the circumferential inner side of the heat sink.

Description

Technical Field

[0001] The utility model relates to the technical field of lasers, in particular to a heat sink and a laser. Background Art

[0002] In the existing laser, a plurality of heat sinks arranged in an array are mounted on the heat dissipation surface of the heat dissipation device, a chip is mounted on the top surface of the heat sink, and a heat dissipation channel is provided inside the heat sink. The heat dissipation channel in each heat sink is connected with the channel in the heat dissipation device, so that the heat dissipation device can dissipate heat from each heat sink.

[0003] The liquid inlet joint and liquid return joint at the bottom of the heat sink are inserted into the corresponding holes on the heat sink, so as to realize the inflow and outflow of the heat dissipation medium. Since the liquid inlet joint and liquid return joint have a certain volume and are limited by the area of ​​the bottom of the heat sink, the two are arranged near the middle position of the heat sink, and the distance between the two is short. Correspondingly, the distance between the two holes corresponding to the heat dissipation flow channel of the liquid inlet joint and the liquid return joint is short, resulting in a short heat dissipation flow channel, resulting in insufficient heat dissipation capacity of the existing heat sink. Utility Model Content

[0004] The utility model aims to provide a heat sink and a laser, so as to alleviate the technical problem of insufficient heat dissipation of the existing heat sink.

[0005] In a first aspect, an embodiment of the utility model provides a heat sink, wherein the top surface of the heat sink forms a heat dissipation surface, and a heat dissipation channel is arranged inside the heat sink, and the heat dissipation channel is located below the heat dissipation surface;

[0006] The heat sink is also provided with a liquid inlet channel and a liquid return channel; the liquid inlet channel includes a liquid outlet connected to the heat dissipation channel and a liquid inlet connected to the bottom surface of the heat sink; the liquid return channel includes a liquid return port connected to the heat dissipation channel and a liquid discharge port connected to the bottom surface of the heat sink; the bottom surface of the heat sink is provided with a liquid inlet joint coaxially connected to the liquid inlet; the bottom surface of the heat sink is provided with a liquid return joint coaxially connected to the liquid discharge port;

[0007] From top to bottom, the line connecting the center of the liquid outlet and the center of the liquid inlet is inclined toward the circumferential inner side of the heat sink, and the line connecting the center of the liquid return port and the center of the liquid discharge port is inclined toward the circumferential inner side of the heat sink.

[0008] Furthermore, the heat sink includes a base and a cover plate, the top surface of the base has a groove that is sunken downward, and the liquid outlet and the liquid return port are respectively arranged on the bottom surface of the groove;

[0009] The bottom surface of the cover plate is provided with a heat dissipation rib protruding downwards, the cover plate is connected to the top surface of the base, and the heat dissipation rib is inserted into the groove, and the groove and the heat dissipation rib form a heat dissipation flow channel.

[0010] Furthermore, the connection between the heat dissipation rib and the bottom surface of the cover plate has a chamfer.

[0011] Furthermore, the base includes an upper part, a lower part, a first middle part and a second middle part, and the upper part and the lower part are arranged in a vertical interval; the groove is arranged in the upper part, and the liquid inlet and the liquid outlet are arranged on the bottom surface of the lower part; the upper ends of the first middle part and the second middle part are connected to the bottom surface of the upper part, and the lower ends of the first middle part and the second middle part are connected to the top surface of the lower part; the liquid inlet channel is arranged in the first middle part, and the liquid return channel is arranged in the second middle part; and the first middle part and the second middle part are arranged in a horizontal interval.

[0012] Furthermore, the top surface of the base is rectangular, and the liquid outlet and the liquid return port are respectively located at the diagonal corners of the rectangular base.

[0013] Furthermore, the heat sink has a first channel extending vertically downward from the liquid outlet, and the lower end of the first channel is spaced apart from the bottom surface of the heat sink; the heat sink has a second channel extending vertically upward from the liquid inlet, and the upper end of the second channel is spaced apart from the bottom surface of the heat sink channel of the heat sink; the first channel and the second channel partially overlap;

[0014] The heat sink has a third channel extending vertically downward from the liquid return port, and the lower end of the third channel is spaced apart from the bottom surface of the heat sink; the heat sink has a fourth channel extending vertically upward from the liquid discharge port, and the upper end of the fourth channel is spaced apart from the bottom surface of the heat dissipation channel of the heat sink; the third channel and the fourth channel partially overlap.

[0015] Further, the area S1 of the vertical overlapping surface of the first channel and the second channel, the transverse cross-sectional area S2 of the first channel, and the transverse cross-sectional area S3 of the second channel, S1 is greater than S2, and S1 is greater than S3;

[0016] The area of ​​the vertical overlapping surface of the third channel and the fourth channel is S4, the transverse cross-sectional area of ​​the third channel is S5, and the transverse cross-sectional area of ​​the fourth channel is S6. S4 is greater than S5, and S4 is greater than S6.

[0017] Furthermore, the liquid inlet channel and the liquid return channel are both linear channels.

[0018] Furthermore, the heat dissipation channel extends in an S shape.

[0019] In a second aspect, the utility model provides a laser including the above-mentioned heat sink.

[0020] The top surface of the heat sink provided by the embodiment of the utility model forms the heat dissipation surface, and a heat dissipation channel is arranged inside the heat sink, and the heat dissipation channel is located below the heat dissipation surface; a liquid inlet channel and a liquid return channel are also arranged inside the heat sink; the liquid inlet channel includes a liquid outlet connected with the heat dissipation channel, and a liquid inlet connected with the bottom surface of the heat sink; the liquid return channel includes a liquid return port connected with the heat dissipation channel, and a liquid discharge port connected with the bottom surface of the heat sink; a liquid inlet joint coaxially connected with the liquid inlet is arranged on the bottom surface of the heat sink; a liquid return joint coaxially connected with the liquid discharge port is arranged on the bottom surface of the heat sink; from top to bottom, the line connecting the center of the liquid outlet and the center of the liquid inlet is inclined toward the circumferential inner side of the heat sink, and the line connecting the center of the liquid return port and the center of the liquid discharge port is inclined toward the circumferential inner side of the heat sink.

[0021] In this solution, the liquid outlet and the liquid inlet are not coaxially arranged, and the liquid return port and the liquid drain port are also coaxially arranged, wherein the liquid outlet and the liquid return port are closer to the circumferential outer side of the heat sink, so the heat dissipation channel can be arranged longer. The liquid inlet and the liquid drain port are closer to the circumferential inner side of the heat sink, which reserves a larger processing space for the liquid inlet joint and the liquid outlet joint, making it easier to prepare the liquid inlet joint and the liquid return joint. This solution can extend the heat dissipation channel as much as possible on a relatively small heat sink, improve the heat dissipation efficiency, and at the same time will not affect the arrangement of the liquid inlet joint and the liquid return joint.

[0022] The laser provided by the utility model includes the above-mentioned heat sink. Because the laser provided by the embodiment of the utility model uses the above-mentioned heat sink, the laser provided by the embodiment of the utility model also has the advantages of the heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a heat sink provided in Example 1 of the utility model;

[0025] Figure 2 A schematic diagram of a base of a heat sink provided in Example 1 of the utility model;

[0026] Figure 3 A schematic diagram of a cover plate of a heat sink provided in Example 1 of the utility model;

[0027] Figure 4 A side view of the heat sink provided in Example 1 of the utility model;

[0028] Figure 5 for Figure 4 Sectional view along the A-A direction;

[0029] Figure 6 for Figure 4 Cross-sectional view along the B-B direction;

[0030] Figure 7 for Figure 4 Sectional view along the C-C direction;

[0031] Figure 8 A cross-sectional view of the liquid inlet channel of the heat sink provided in Example 2 of the utility model;

[0032] Fig. 9 This is a cross-sectional view of the liquid return channel of the heat sink provided in Example 2 of the utility model.

[0033] Icon: 100-chip;

[0034] 220 - liquid inlet channel; 230 - liquid return channel;

[0035] 310 - liquid outlet; 320 - liquid return port; 330 - liquid inlet; 340 - liquid discharge port;

[0036] 410 - liquid inlet connector; 420 - liquid return connector;

[0037] 510 - upper part; 511 - groove; 520 - lower part; 530 - first middle part; 531 - first channel; 532 - second channel; 540 - second middle part; 541 - third channel; 542 - fourth channel; 550 - cover plate; 551 - heat dissipation rib. DETAILED DESCRIPTION

[0038] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Example 1

[0040] like Figure 1 - Figure 3As shown, the top surface of the heat sink provided by the embodiment of the utility model forms a heat sink surface, on which the chip 100 is mounted, and each heat sink can dissipate heat for one chip 100. Multiple heat sinks are arranged in an array on the same heat sink block, and the upper surface of the heat sink block is provided with multiple cooling areas, each cooling area corresponding to a heat sink. The cooling area is provided with a first opening and a second opening, and the coolant flowing out of the first opening returns to the second opening after heat exchange with the heat sink, and the heat sink uniformly circulates the coolant in the multiple heat sinks.

[0041] The heat sink is provided with a heat dissipation channel inside, and the plane extending from the heat dissipation channel is parallel to the heat dissipation surface. The heat dissipation channel is located below the heat dissipation surface, and after the coolant flows through the heat dissipation surface, the heat dissipation surface is dissipated, that is, the chip 100 mounted on the heat dissipation surface is dissipated.

[0042] like Figure 4 - Figure 7 As shown, the interior of the heat sink is also provided with a liquid inlet channel 220 and a liquid return channel 230. The liquid inlet channel 220 includes a liquid outlet 310 connected to the heat dissipation channel, and a liquid inlet 330 connected to the bottom surface of the heat sink. That is to say, the coolant in the heat sink first enters the liquid inlet 330, then flows out from the liquid outlet 310 and enters the heat dissipation channel. The liquid return channel 230 also includes a liquid return port 320 connected to the heat dissipation channel, and a liquid discharge port 340 connected to the bottom surface of the heat sink. After the coolant in the heat dissipation channel absorbs heat, it flows out from the liquid return port 320 and enters the heat dissipation block from the liquid discharge port 340.

[0043] The bottom surface of the heat sink is provided with a liquid inlet joint 410 coaxially connected to the liquid inlet 330, and the bottom surface of the heat sink is provided with a liquid return joint 420 coaxially connected to the liquid discharge port 340. The liquid inlet joint 410 is inserted into the first opening of the heat sink, and the liquid return joint 420 is inserted into the second opening to realize the conduction of the coolant.

[0044] The liquid outlet 310 and the liquid inlet 330 are not coaxially arranged. From top to bottom, the line connecting the center of the liquid outlet 310 and the center of the liquid inlet 330 is inclined toward the circumferential inner side of the heat sink. Similarly, the center of the liquid return port 320 and the liquid discharge port 340 are not coaxially arranged. The line connecting the center of the liquid return port 320 and the center of the liquid discharge port 340 is inclined toward the circumferential inner side of the heat sink.

[0045] In this solution, the liquid outlet 310 and the liquid inlet 330 are not coaxially arranged, and the liquid return port 320 and the liquid discharge port 340 are also coaxially arranged, wherein the liquid outlet 310 and the liquid return port 320 are closer to the circumferential outer side of the heat sink, therefore, the liquid outlet 310 and the liquid return port 320 can both be close to the outer side, and the distance between them can be set longer, that is, the heat dissipation channel can be arranged longer. The liquid inlet 330 and the liquid discharge port 340 are closer to the circumferential inner side of the heat sink, and a larger processing space is reserved for the liquid inlet joint 410 and the liquid outlet joint, which can make it easier to prepare the liquid inlet joint 410 and the liquid return joint 420. This solution can extend the heat dissipation channel as much as possible on a relatively small heat sink, improve the heat dissipation efficiency, and at the same time will not affect the arrangement of the liquid inlet joint 410 and the liquid return joint 420.

[0046] In this case, the heat sink is roughly in the shape of a cuboid, and its cross-section is rectangular. The liquid outlet 310 and the liquid return port 320 are arranged at diagonal positions, and the distance between them is set as far as possible to extend the length of the heat dissipation channel.

[0047] like Figure 2 and Figure 3 As shown, the heat sink includes a base and a cover plate 550. The top surface of the base has a groove 511 that is concave downward, and the groove 511 is located in the middle position. The liquid outlet 310 and the liquid return port 320 are respectively arranged on the bottom surface of the groove 511. The bottom surface of the cover plate 550 has a downwardly protruding heat dissipation rib 551, and the position of the heat dissipation rib 551 corresponds to the upper and lower grooves 511. The cover plate 550 is connected to the top surface of the base, and the heat dissipation rib 551 is inserted into the groove 511. The groove 511 and the heat dissipation rib 551 form a heat dissipation flow channel. The bottom end of the heat dissipation rib 551 can contact the bottom surface of the groove 511, thereby forming two branch flow channels on the left and right sides of the heat dissipation rib 551. The coolant flows through the two sides of the heat dissipation rib 551 and can fully contact the heat dissipation rib 551, so that the heat transfer efficiency is high.

[0048] The connection between the heat dissipation rib 551 and the bottom surface of the cover plate 550 has a chamfer, and the arc-shaped chamfer can prevent heat accumulation.

[0049] like Figure 1As shown, the base includes an upper part 510, a lower part 520, a first middle part 530 and a second middle part 540, and the upper part 510 and the lower part 520 are arranged in a vertical interval. The groove 511 is arranged on the top surface of the upper part 510, and the upper part 510 is connected to the cover plate 550. The liquid inlet 330 and the liquid outlet 340 are arranged on the bottom surface of the lower part 520. The upper ends of the first middle part 530 and the second middle part 540 are both connected to the bottom surface of the upper part 510. The lower ends of the first middle part 530 and the second middle part 540 are both connected to the top surface of the lower part 520. The first middle part 530 and the second middle part 540 can be connected to the upper part 510 and the lower part 520 respectively by welding, or the upper part 510, the lower part 520, the first middle part 530 and the second middle part 540 can be integrally formed by injection molding. The liquid inlet channel 220 is arranged in the first middle part 530, and the liquid return channel 230 is arranged in the second middle part 540, and the first middle part 530 and the second middle part 540 are arranged at intervals in the lateral direction. The interval arrangement can reduce the heat exchange between the two and avoid the influence of the high temperature return liquid on the liquid inlet.

[0050] The top surface of the base is rectangular, and the liquid outlet 310 and the liquid return port 320 are respectively located at the diagonal corners of the rectangular base, and the distance between them is far enough to set a longer heat dissipation channel.

[0051] In this embodiment, the groove 511 is bent and extended, for example, in an S shape, and the corresponding heat dissipation rib 551 is also in an S shape, thereby dividing the heat dissipation channel into two S-shaped branches, and the liquid outlet 310 and the liquid return port 320 are located at the head and end of the S-shaped channel. The coolant flowing out of the liquid outlet 310 flows into the two branches respectively, flows along the S-shaped path, and then converges at the liquid return port 320.

[0052] In this embodiment, Figure 6 and Figure 7As shown, the heat sink has a first channel 531 extending vertically downward from the liquid outlet 310, the lower end of the first channel 531 does not extend to the lower part 520, and the lower end of the first channel 531 is spaced from the bottom surface of the heat sink. The heat sink has a second channel 532 extending vertically upward from the liquid inlet 330, the upper end of the second channel 532 does not extend to the upper part 510, and the upper end of the second channel 532 is spaced from the bottom surface of the heat sink channel. The first channel 531 and the second channel 532 partially overlap, and the coolant enters the second channel 532 from the liquid inlet 330, and then flows into the first channel 531 horizontally from the overlapping position of the first channel 531 and the second channel 532, and then flows out from the liquid outlet 310. Similarly, the heat sink has a third channel 541 extending vertically downward from the liquid return port 320, and the lower end of the third channel 541 is spaced from the bottom surface of the heat sink. The heat sink has a fourth channel 542 extending vertically upward from the drain port 340. The upper end of the fourth channel 542 is spaced apart from the bottom surface of the heat sink's heat dissipation channel. The third channel 541 and the fourth channel 542 partially overlap. The coolant flows from the liquid return port 320 into the third channel 541, then flows horizontally from the overlapping position of the third channel 541 and the fourth channel 542 into the fourth channel 542, and finally flows out from the drain port 340. This arrangement can make the second channel 532 and the fourth channel 542 closer to the middle position of the heat sink, while the first channel 531 and the third channel 541 are closer to the outside of the heat sink.

[0053] Furthermore, the area S1 of the vertical overlapping surface of the first channel 531 and the second channel 532, the transverse cross-sectional area S2 of the first channel 531, and the transverse cross-sectional area S3 of the second channel 532, S1 is greater than S2, and S1 is greater than S3; the area S4 of the vertical overlapping surface of the third channel 541 and the fourth channel 542, the transverse cross-sectional area S5 of the third channel 541, and the transverse cross-sectional area S6 of the fourth channel 542, S4 is greater than S5, and S4 is greater than S6.

[0054] S1 is greater than S2, and S1 is greater than S3, which can avoid the coolant from being blocked and reduce resistance at the transition between the first channel 531 and the second channel 532. Similarly, the coolant resistance at the transition between the third channel 541 and the fourth channel 542 is also small, and the coolant can pass smoothly.

[0055] Example 2

[0056] like Figure 8 and Fig. 9As shown, the difference from Example 1 is that in this embodiment, the liquid inlet channel 220 connecting the liquid outlet 310 and the liquid inlet 330 is a straight channel, and is inclined relative to the vertical direction, and there is no bend transition in the middle. Similarly, the liquid return channel 230 is also a straight channel, and is inclined relative to the vertical direction, and there is no bend transition in the middle. Since the heat sink structure is smaller, compared with Example 1, although the inclined drilling is more difficult, it can be formed in one time.

[0057] The laser provided by the utility model includes the above-mentioned heat sink. Because the laser provided by the embodiment of the utility model uses the above-mentioned heat sink, the laser provided by the embodiment of the utility model also has the advantages of the heat sink.

[0058] Finally, it should be noted that the above embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A heat sink, characterized in that: The top surface of the heat sink forms a heat sink surface, and a heat sink flow channel is provided inside the heat sink, and the heat sink flow channel is located below the heat sink surface; The heat sink is further provided with a liquid inlet channel (220) and a liquid return channel (230) inside; the liquid inlet channel (220) comprises a liquid outlet (310) in communication with the heat dissipation channel, and a liquid inlet (330) in communication with the bottom surface of the heat sink; the liquid return channel (230) comprises a liquid return port (320) in communication with the heat dissipation channel, and a liquid discharge port (340) in communication with the bottom surface of the heat sink; the bottom surface of the heat sink is provided with a liquid inlet joint (410) in coaxial communication with the liquid inlet (330); the bottom surface of the heat sink is provided with a liquid return joint (420) in coaxial communication with the liquid discharge port (340); From top to bottom, a line connecting the center of the liquid outlet (310) and the center of the liquid inlet (330) is inclined toward the circumferential inner side of the heat sink, and a line connecting the center of the liquid return port (320) and the center of the liquid discharge port (340) is inclined toward the circumferential inner side of the heat sink.

2. The heat sink according to claim 1, characterized in that: The heat sink comprises a base and a cover plate (550); the top surface of the base has a groove (511) that is recessed downward; the liquid outlet (310) and the liquid return port (320) are respectively arranged on the bottom surface of the groove (511); The bottom surface of the cover plate (550) has a heat dissipation rib (551) protruding downward, the cover plate (550) is connected to the top surface of the base, and the heat dissipation rib (551) is inserted into the groove (511), and the groove (511) and the heat dissipation rib (551) form the heat dissipation flow channel.

3. The heat sink according to claim 2, characterized in that: The connection between the heat dissipation rib (551) and the bottom surface of the cover plate (550) is chamfered.

4. The heat sink according to claim 2, characterized in that: The base comprises an upper part (510), a lower part (520), a first middle part (530) and a second middle part (540), wherein the upper part (510) and the lower part (520) are arranged at intervals in the vertical direction; the groove (511) is arranged in the upper part (510), and the liquid inlet (330) and the liquid outlet (340) are arranged on the bottom surface of the lower part (520); the upper ends of the first middle part (530) and the second middle part (540) are connected to the bottom surface of the upper part (510), and the lower ends of the first middle part (530) and the second middle part (540) are connected to the top surface of the lower part (520); the liquid inlet channel (220) is arranged in the first middle part (530), and the liquid return channel (230) is arranged in the second middle part (540); and the first middle part (530) and the second middle part (540) are arranged at intervals in the horizontal direction.

5. The heat sink according to claim 2, characterized in that: The top surface of the base is rectangular, and the liquid outlet (310) and the liquid return outlet (320) are respectively located at opposite corners of the rectangular base.

6. The heat sink according to any one of claims 1 to 5, characterized in that: The heat sink has a first channel (531) extending vertically downward from the liquid outlet (310), and the lower end of the first channel (531) is spaced apart from the bottom surface of the heat sink; the heat sink has a second channel (532) extending vertically upward from the liquid inlet (330), and the upper end of the second channel (532) is spaced apart from the bottom surface of the heat dissipation channel of the heat sink; the first channel (531) and the second channel (532) partially overlap; The heat sink has a third channel (541) extending vertically downward from the liquid return port (320), and the lower end of the third channel (541) is spaced apart from the bottom surface of the heat sink; the heat sink has a fourth channel (542) extending vertically upward from the liquid discharge port (340), and the upper end of the fourth channel (542) is spaced apart from the bottom surface of the heat dissipation channel of the heat sink; the third channel (541) and the fourth channel (542) partially overlap.

7. The heat sink according to claim 6, characterized in that: An area S1 of a vertical overlapping surface of the first channel (531) and the second channel (532), a transverse cross-sectional area S2 of the first channel (531), and a transverse cross-sectional area S3 of the second channel (532), wherein S1 is greater than S2 and S1 is greater than S3; The area S4 of the vertical overlapping surface of the third channel (541) and the fourth channel (542), the transverse cross-sectional area S5 of the third channel (541), and the transverse cross-sectional area S6 of the fourth channel (542), wherein S4 is greater than S5 and S4 is greater than S6.

8. The heat sink according to any one of claims 1 to 5, characterized in that: The liquid inlet channel (220) and the liquid return channel (230) are both linear channels.

9. The heat sink according to any one of claims 1 to 5, characterized in that: The heat dissipation channel extends in an S shape.

10. A laser, characterized in that: The heat sink comprises the heat sink described in any one of claims 1 to 9.

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