Liquid cooling radiator

Abstract

The utility model discloses a liquid cooling radiator, comprising a main body; the main flow channel assembly is arranged in the main body and comprises a first main flow channel, a second main flow channel and a third main flow channel; the first main runner and the second main runner are connected in parallel and then are connected in series with the third main runner; the sub-runner comprises a plurality of small runners which are connected together in parallel; the plurality of sub-runners are connected in series to form the first main runner; the other multiple sub-runners are connected in series to form the second main runner; the width of the branch runner is at least two times that of the third main runner. The third main runner is additionally arranged, so that heat dissipation of the heat source above the runners is not affected, and fluid resistance and pressure loss can be reduced to a greater extent; the width of the sub-runner is increased, the heat dissipation efficiency is further improved, and fluid resistance and energy loss are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of power electronic equipment, in particular to a liquid cooling radiator. Background Art

[0002] In the current power electronics industry, as power density continues to increase, traditional air cooling can no longer meet the increasingly stringent heat dissipation requirements. Therefore, liquid cooling technology has gradually become the new favorite of the industry and has been widely used in power electronic equipment. As the core component of the heat dissipation system, the design and optimization of liquid cooling radiators are particularly critical.

[0003] Especially in the application field of wind power converters, the rapid development of offshore wind power in recent years has put forward higher requirements on the power density of converters. This has directly promoted the in-depth research and innovation of power unit design in converters. With the continuous growth of heat dissipation power demand and the continuous improvement of power density, the development of high-efficiency liquid cooling radiators has become an urgent need of the industry.

[0004] However, traditional liquid cooling radiators are unable to cope with the challenges of high power and high power density. The main problems are reflected in the following aspects:

[0005] (1) Traditional liquid cooling radiators usually adopt a multi-branch parallel flow channel design. However, in the context of pursuing higher heat dissipation efficiency, that is, when more heat needs to be removed per unit flow rate, this design can no longer meet the demand.

[0006] (2) In terms of manufacturing process, traditional liquid cooling radiators often use drilling methods, and there are many right-angle turns in the flow channel, which increases the resistance of the fluid and affects the overall heat dissipation performance. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a liquid cooling radiator with high heat dissipation efficiency and low fluid resistance.

[0008] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0009] A liquid cooling radiator, comprising:

[0010] main body;

[0011] A main flow channel assembly is disposed in the main body, and includes a first main flow channel, a second main flow channel and a third main flow channel; the first main flow channel is connected in parallel with the second main flow channel and then connected in series with the third main flow channel;

[0012] A branch flow channel, comprising a plurality of small flow channels connected in parallel;

[0013] A plurality of the branch channels are connected in series to form the first main channel; another plurality of the branch channels are connected in series to form the second main channel;

[0014] The width of the branch channel is at least twice the width of the third main channel.

[0015] Furthermore, it also includes a plurality of support walls, wherein the support walls are arranged on both sides of the branch channel, and the width of the branch channel is 2 to 6 times the width of the support walls.

[0016] Furthermore, it also includes a plurality of diverting channels, wherein the diverting channel is arranged between two adjacent branch channels, and its extension direction intersects with the extension direction of the branch channel; at least one of the diverting channels is alternately connected with a plurality of the branch channels to form the first main channel or the second main channel.

[0017] Furthermore, an extension direction of the diverting flow channel and an extension direction of the branch flow channel are arranged perpendicular to each other.

[0018] Furthermore, a drainage channel is provided at the connection between the branch channel and the main channel assembly or the turning channel, and the cross-sectional area of ​​the drainage channel decreases successively from the branch channel to the main channel assembly or the turning channel.

[0019] Furthermore, the support wall is provided with a drainage surface, and the drainage surface is arranged at the drainage channel, so that the longitudinal section of the drainage channel is trapezoidal.

[0020] Furthermore, a bypass channel is included, and two ends of the bypass channel are respectively connected to the first main channel and the second main channel.

[0021] Furthermore, the branch flow channel includes 6 to 10 small flow channels connected in parallel.

[0022] Furthermore, the first main flow channel includes 3 to 7 branch flow channels.

[0023] Furthermore, the two main flow channels include 1 to 5 branch flow channels.

[0024] Furthermore, a liquid inlet is provided in the main body, and the liquid inlet is connected to the liquid inlet ends of the first main channel and the second main channel, and the liquid outlet ends of the first main channel and the second main channel are connected to the third main channel.

[0025] Furthermore, a liquid outlet is provided in the main body, and the liquid outlet is communicated with the liquid outlet end of the third main flow channel.

[0026] Furthermore, the first main flow channel and the second main flow channel are in an "S" shape, and the third main flow channel is in an "I" shape.

[0027] Beneficial effects of the utility model:

[0028] The branch channel corresponds to the location of the heat source. By adding a third main channel, the present application not only does not affect the heat dissipation of the heat source above the channel, but also can reduce the fluid resistance and pressure loss to a greater extent; the present application increases the width of the branch channel, further improves the heat dissipation efficiency, and reduces the fluid resistance and energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the use state of the liquid cooling radiator of the utility model in one embodiment;

[0030] Figure 2 This is a schematic diagram of the use state of the liquid cooling radiator of the utility model in another embodiment;

[0031] Figure 3 It is a cross-sectional view of a liquid cooling radiator of the utility model in one embodiment;

[0032] Figure 4 This is a simulated temperature cloud diagram of the liquid cooling radiator of the utility model in one embodiment.

[0033] Reference numerals include:

[0034] 100—main body 110—liquid inlet 120—liquid outlet

[0035] 200 - main flow channel assembly 210 - first main flow channel 220 - second main flow channel

[0036] 230—third main flow channel 310—dividing flow channel 311—small flow channel

[0037] 320 - diverting channel 330 - drainage channel 410 - support wall

[0038] 420—drainage surface 500—bypass flow channel 600—heat source DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] like Figure 1 As shown, the liquid cooling radiator can arrange the heat source 600 on one side, and the flow channel size can also be adjusted according to the loss, the installation position of the heat source 600 and the flow rate. Figure 2 As shown, the liquid cooling radiator can also arrange the heat source 600 on both sides, the overall series-parallel scheme of the flow channel remains unchanged, and the flow channel size can be adjusted according to the loss and flow rate, thereby realizing a high-power and high-density power solution. The liquid cooling radiator can meet the different needs of single-sided heat dissipation and double-sided heat dissipation.

[0044] Please refer to Figure 3 , which is a preferred embodiment of the utility model, the liquid cooling radiator comprises: a main body 100; a main flow channel assembly 200, which is arranged in the main body 100, including a first main flow channel 210, a second main flow channel 220 and a third main flow channel 230; the first main flow channel 210 is connected in parallel with the second main flow channel 220 and then connected in series with the third main flow channel 230; a branch flow channel 310, including a plurality of small flow channels 311 connected in parallel; a plurality of the branch flow channels 310 are connected in series to form the first main flow channel 210; another plurality of the branch flow channels 310 are connected in series to form the second main flow channel 220; the width of the branch flow channel 310 is at least twice the width of the third main flow channel 230. The branch channel 310 corresponds to the position of the heat source 600. The present application adds a third main channel 230, which does not affect the heat dissipation of the heat source 600 above the channel and can also reduce the fluid resistance and pressure loss to a greater extent; the present application increases the width of the branch channel 310, further improves the heat dissipation efficiency, and reduces the fluid resistance.

[0045] In a preferred embodiment of the present application, the liquid cooling radiator includes a main body 100, a main channel assembly 200, a support wall 410, a bypass channel 500 and other structures. The main channel assembly 200, the support wall 410 and the bypass channel 500 and other structures are all arranged in the main body 100. The above-mentioned components are further described in detail below.

[0046] In one embodiment of the present application, the main body 100 is roughly in the shape of a rectangular parallelepiped. Of course, in other embodiments, it can also be set to other shapes according to specific needs, but the whole should be in the shape of a thin sheet. The main body 100 is provided with a liquid inlet 110 and a liquid outlet 120. The liquid inlet 110 is used to inject coolant into the main channel assembly 200, and the liquid outlet 120 is used to allow the coolant to flow out of the main channel assembly 200.

[0047] The main flow channel assembly 200 includes a first main flow channel 210, a second main flow channel 220 and a third main flow channel 230. The first main flow channel 210 and the second main flow channel 220 are connected in parallel and then connected in series with the third main flow channel 230. The first main flow channel 210 and the second main flow channel 220 are in an "S" shape and are arranged in the middle of the main body 100. The third main flow channel 230 is in an "I" shape and is arranged on one side of the first main flow channel 210 and the second main flow channel 220.

[0048] Specifically, the liquid inlet 110 is connected to the liquid inlet ends of the first main channel 210 and the second main channel 220, and the liquid outlet ends of the first main channel 210 and the second main channel 220 are connected to the liquid inlet end of the third main channel 230. The liquid outlet end of the third main channel 230 is connected to the liquid outlet 120.

[0049] The first main channel 210 and the second main channel 220 are substantially the same, and both include a branch channel 310, a turning channel 320, and a diversion channel 330. The first main channel 210 and the second main channel 220 both include a plurality of branch channels 310. For example, in some embodiments of the present application, the first main channel 210 includes 3 to 7 branch channels 310; the second main channel 220 includes 1 to 5 branch channels 310. The plurality of branch channels 310 of the first main channel 210 and the second main channel 220 are arranged side by side in the middle of the main body 100 along the width direction thereof, and the length direction of the branch channels 310 is parallel to the width direction of the main body 100.

[0050] The branch channel 310 includes a plurality of small channels 311 connected in parallel, and the position of the small channel 311 corresponds to the heat source 600. In some embodiments of the present application, each of the branch channels 310 includes 6 to 10 small channels 311 connected in parallel. The width of the branch channel 310 is at least twice the width of the third main channel 230. The provision of a plurality of small channels 311, on the one hand, increases the contact area between the main body 100 and the coolant, thereby improving the heat dissipation efficiency; the change in the width of the branch channel 310 and the third main channel 230 also increases the turbulence effect of the coolant, so that the heat in the heat concentration area can be quickly taken out, thereby improving the heat exchange efficiency of the entire liquid-cooled radiator.

[0051] The utility model realizes flow distribution of each branch flow channel 310 by arranging a plurality of branch flow channels 310 in series within a certain number range, and makes the fluid flow pattern more balanced by adjusting the number and size of the parallel small flow channels 311.

[0052] The diverting channel 320 is disposed between two adjacent branch channels 310, and its extension direction intersects with the extension direction of the branch channel 310. In one embodiment of the present application, the extension direction of the diverting channel 320 is perpendicular to the extension direction of the branch channel 310. At least one diverting channel 320 is alternately connected with a plurality of branch channels 310 to form the first main channel 210 or the second main channel 220, so that the first main channel 210 and the second main channel 220 are in one or more "S" shapes.

[0053] The liquid cooling radiator further includes a plurality of supporting walls 410, which are arranged on both sides of the flow diversion channel 310, and the internal cavity of the main body 100 is separated into a first main flow channel 210, a second main flow channel 220 and a third main flow channel 230 by the supporting walls 410. The width of the flow diversion channel 310 is 2 to 6 times the width of the supporting wall 410. With such an arrangement, the width and number of the flow diversion channels 310 are significantly increased, and the liquid cooling radiator can be adapted to a larger number of heat sources 600, so that the overall structure of the liquid cooling radiator is compact and the occupied space is reduced.

[0054] like Figure 1 and Figure 2 As shown, the liquid cooling radiator is particularly suitable for the situation where the number of heat sources 600 is large, the area is small and concentrated. For example, in one embodiment of the present application, the liquid cooling radiator can be suitable for the situation where there are four heat sources 600. The four heat sources 600 are installed very compactly, making the liquid cooling radiator suitable for an even number of heat sources 600. Figure 3As shown, in order to enhance heat dissipation, maximize the width of the flow channel, and ensure that the installation hole of the heat source 600 avoids the flow channel, and considering the processing feasibility, under the premise of compact installation of the heat source 600, a diversion flow channel 330 is provided at the connection between the branch flow channel 310 and the third main flow channel 230 or the turning flow channel 320. The cross-sectional area of ​​the diversion flow channel 330 decreases in sequence from the branch flow channel 310 to the main flow channel assembly 200 or the turning flow channel 320.

[0055] The support wall 410 is provided with a drainage surface 420, and the two ends of the drainage surface 420 are respectively connected to a certain branch channel 310 and a channel adjacent to the branch channel 310, that is, the drainage surface 420 is arranged at the drainage channel 330, so that the longitudinal section of the drainage channel 330 is trapezoidal.

[0056] In order to reduce the thermal distribution gradient of the entire liquid-cooled radiator and increase the temperature uniformity between each heat source 600, a bypass channel 500 is designed between the two parallel first main channels 210 and the second main channels 220 to form a three-parallel trend. Specifically, the two ends of the bypass channel 500 are respectively connected to the first main channel 210 and the second main channel 220. Such a setting can reduce the thermal distribution gradient of the entire liquid-cooled radiator, reduce the temperature difference at different positions in the liquid-cooled radiator, and help improve the consistency of the heat dissipation effect at different positions. By adjusting the liquid temperature in each channel according to the width and position of the bypass channel 500, the specific setting position and number of the bypass channel 500 can be adjusted according to actual needs.

[0057] In a specific embodiment, Figure 4 As shown, compared with not setting the bypass flow channel 500 in the main body 100, the heat distribution gradient of the liquid-cooled radiator is greatly reduced. The shell temperature gradient of the heat source 600 with the same power is within 4°C, which greatly reduces the temperature gradient of the liquid-cooled radiator, ensures the temperature uniformity and operation stability of each heat source 600 when working, and improves the life of the heat source 600.

[0058] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. A liquid cooling radiator, characterized in that: include: Subject(100); A main flow channel assembly (200) is disposed in the main body (100), and comprises a first main flow channel (210), a second main flow channel (220), and a third main flow channel (230); the first main flow channel (210) and the second main flow channel (220) are connected in parallel and then connected in series with the third main flow channel (230); A branch flow channel (310) comprising a plurality of small flow channels (311) connected in parallel; A plurality of the branch channels (310) are connected in series to form the first main channel (210); another plurality of the branch channels (310) are connected in series to form the second main channel (220); The width of the branch channel (310) is at least twice the width of the third main channel (230).

2. The liquid cooling radiator according to claim 1, characterized in that: It also includes a plurality of support walls (410), wherein the support walls (410) are arranged on both sides of the flow diversion channel (310), and the width of the flow diversion channel (310) is 2 to 6 times the width of the support walls (410).

3. The liquid cooling radiator according to claim 2, characterized in that: It also includes a plurality of diverting flow channels (320), wherein the diverting flow channels (320) are arranged between two adjacent branch flow channels (310), and their extension direction intersects with the extension direction of the branch flow channels (310); at least one of the diverting flow channels (320) and a plurality of the branch flow channels (310) are alternately connected together to form the first main flow channel (210) or the second main flow channel (220).

4. The liquid cooling radiator according to claim 3, characterized in that: The extension direction of the diverting flow channel (320) and the extension direction of the branch flow channel (310) are arranged perpendicular to each other.

5. The liquid cooling radiator according to claim 3, characterized in that: A drainage channel (330) is provided at the connection between the branch channel (310) and the main channel assembly (200) or the turning channel (320), and the cross-sectional area of ​​the drainage channel (330) decreases in the direction from the branch channel (310) to the main channel assembly (200) or the turning channel (320).

6. The liquid cooling radiator according to claim 5, characterized in that: The support wall (410) is provided with a drainage surface (420), and the drainage surface (420) is arranged at the drainage channel (330), so that the longitudinal section of the drainage channel (330) is trapezoidal.

7. The liquid cooling radiator according to claim 1, characterized in that: It also includes a bypass channel (500), and two ends of the bypass channel (500) are respectively connected to the first main channel (210) and the second main channel (220).

8. The liquid cooling radiator according to claim 1, characterized in that: The branch flow channel (310) includes 6 to 10 small flow channels (311) connected in parallel.

9. The liquid cooling radiator according to claim 1, characterized in that: The first main flow channel (210) includes 3 to 7 branch flow channels (310).

10. The liquid cooling radiator according to claim 1, characterized in that: The two main flow channels (220) include 1 to 5 branch flow channels (310).

11. The liquid cooling radiator according to any one of claims 1 to 10, characterized in that: A liquid inlet (110) is provided in the main body (100), and the liquid inlet (110) is connected to the liquid inlet ends of the first main channel (210) and the second main channel (220), and the liquid outlet ends of the first main channel (210) and the second main channel (220) are connected to the third main channel (230).

12. The liquid cooling radiator according to claim 11, characterized in that: A liquid outlet (120) is also provided in the main body (100), and the liquid outlet (120) is communicated with the liquid outlet end of the third main channel (230).

13. The liquid cooling radiator according to claim 12, characterized in that: The first main flow channel (210) and the second main flow channel (220) are in an "S" shape, and the third main flow channel (230) is in an "I" shape.

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