Special-shaped backflow channel vapor chamber and radiator

Abstract

The utility model discloses a special-shaped backflow channel temperature equalizing plate and a radiator, the temperature equalizing plate comprises an upper body, a lower body, a first capillary structure, a second capillary structure and a backflow channel body, the first capillary structure is located on the inner surface of the upper body, the second capillary structure is located on the inner surface of the lower body, and the backflow channel body is located on the lower body. The upper body and the lower body form a closed cavity, and the backflow channel body is provided with a plurality of micro-channels used for backflow of working media. According to the special-shaped backflow channel temperature uniformizing plate and the radiator, the backflow channel body is additionally arranged, and the plurality of micro-channels used for backflow of the working media are arranged on the backflow channel body; the liquid working medium is helped to flow back to the lower body, the multiple micro-channels are additionally arranged, the backflow liquid working medium collected by the micro-channels is more, the backflow speed is higher, and the heat dissipation power and the temperature uniformizing performance of the temperature uniformizing plate can be remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of radiator technology, and in particular to an irregularly shaped heat exchanger plate and radiator with a return channel. Background Technology

[0002] A vapor chamber (VC) is a common rapid heat conduction and dissipation mechanism. Its working principle is that the working medium circulates in the closed plate-shaped cavity in the state of evaporation and condensation to achieve rapid heat conduction and heat diffusion, thus achieving rapid temperature uniformity.

[0003] The existing vapor chambers are arranged in a core area by connecting the capillary layers of the upper and lower covers with powder columns. In this structure, the liquid can only flow back to the evaporation zone through the powder columns, and the return path is relatively simple. The return speed of the liquid is directly related to the performance of the vapor chamber. With the development of technology, the overall requirements of heat sinks are getting higher and higher, and correspondingly, improving the performance of the vapor chamber is becoming more and more important. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide an irregularly shaped reflux channel heat exchange plate and radiator. By adding a reflux channel body and providing multiple microchannels on the reflux channel body for the reflux of the working medium, the reflux of the liquid working medium is made to return faster, with a higher reflux volume and higher heat dissipation power.

[0005] To achieve the above objectives, this utility model provides an irregularly shaped reflux channel heat exchange plate, including an upper body, a lower body, a first capillary structure, a second capillary structure, and a reflux channel body. The first capillary structure is located on the inner surface of the upper body, and the second capillary structure is located on the inner surface of the lower body. The upper body and the lower body form a closed cavity, and a working medium is provided inside the cavity.

[0006] The return channel body is provided with multiple microchannels for the return of the working medium. The upper end of the microchannel is connected to the upper body and the lower end is connected to the lower body.

[0007] Preferably, the return channel body is configured in the shape of a trapezoid, with the upper base of the trapezoid located on the lower body and the lower base located on the upper body, and the length of the upper base being less than the length of the lower base.

[0008] Preferably, the channel spacing at the upper end of the microchannel is greater than the channel spacing at the lower end, and a third capillary structure is provided on the surface of the microchannel, the third capillary structure being connected to the first capillary structure and the second capillary structure.

[0009] Preferably, the spacing between two adjacent microchannels is the same.

[0010] Preferably, the return channel body has multiple microchannels evenly distributed on both the front and back sides.

[0011] Preferably, the temperature distribution plate further includes a column, the two ends of which are fixedly connected to the upper body and the lower body respectively, and a fourth capillary structure is provided on the outer surface of the column, which is connected to the first capillary structure and the second capillary structure.

[0012] Preferably, the column is solid or hollow.

[0013] Meanwhile, this utility model provides an irregularly shaped return channel radiator, including a heat spreader plate.

[0014] The beneficial effects of this utility model are as follows: The irregularly shaped reflux channel heat exchange plate and radiator provided by this utility model, by increasing the reflux channel body, and through the multiple microchannels provided on the reflux channel body for the reflux of the working medium, help the liquid working medium to reflux back to the lower body. By increasing the number of microchannels, more reflux liquid working medium is collected in the microchannels, and the reflux speed is faster, which can significantly improve the heat dissipation power and temperature uniformity performance of the heat exchange plate. Attached Figure Description

[0015] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0016] Figure 1 This is a schematic diagram of the internal structure of the irregularly shaped reflux channel heat exchanger plate in the embodiment;

[0017] Figure 2 This is a schematic diagram of the structure of the return channel body in the embodiment. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0019] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Example: Please refer to Figures 1 to 2 ,

[0021] A non-circular reflux channel heat exchanger includes an upper body 1, a lower body 2, a first capillary structure 31, a second capillary structure 32, and a reflux channel body 4. The first capillary structure 31 is located on the inner surface of the upper body 1, and the second capillary structure 32 is located on the inner surface of the lower body 2. The upper body 1 and the lower body 2 form a closed cavity 11, and a working medium (not shown in the figure) is provided inside the closed cavity 11.

[0022] The reflux channel body 4 is provided with multiple microchannels 5 for the reflux of the working medium. The upper end of the microchannel 5 is connected to the upper body 1, and the lower end is connected to the lower body 2.

[0023] A working medium is provided inside the closed cavity 11. The working medium is liquid in the non-working state. In the working state, the lower body 2 is in contact with the heat source 6. In this embodiment, the heat source 6 can be a chip. Due to the negative pressure inside the closed cavity 11, the extremely low temperature causes the liquid working medium inside to vaporize into a gaseous state. The gaseous working medium carries heat upwards within the closed cavity 11, transferring heat to the upper body 1. The higher-temperature gaseous working medium condenses into a liquid working medium upon encountering the lower-temperature upper body 1. Compared to traditional heat spreaders, the heat spreader in this embodiment has two types of reflux loops: one is liquid... The liquid working medium flows back to the lower body 2 through the first capillary structure 31 and the second capillary structure 32. Alternatively, by adding a return channel body 4, multiple microchannels 5 for the return of the working medium are provided on the return channel body 4 to help the liquid working medium return to the lower body 2. This repeated circulation continuously transfers the heat from the heat source 6, which is then dissipated by the heat sink 7 above the heat spreader plate. Finally, the heat from the heat source 6 is transferred away, achieving the effect of heat dissipation and cooling. Multiple return loops make the return speed of the liquid working medium faster, significantly improving the heat dissipation power and temperature uniformity performance of the heat spreader plate.

[0024] The return channel body 4 is trapezoidal, with the upper base on the lower body 2 and the lower base on the upper body 1. The length of the upper base is shorter than the length of the lower base. When the high-temperature gaseous working medium encounters the low-temperature upper body 1, it condenses into a liquid working medium and disperses on the upper body 1. The microchannel 5 accelerates the collection of the liquid working medium onto the microchannel 5 and then returns it to the lower body 2 through the microchannel 5. The length of the upper base of the return channel body 4 is shorter than the length of the lower base, which is beneficial for collecting the liquid working medium with a larger area on the upper body 1 onto the smaller area of ​​the lower body 2. Since the contact area between the lower body 2 and the heat source 6 is limited, within a limited area, compared with the existing heat spreader without the return channel body 4 under the same conditions, it collects more return liquid working medium and has a faster return speed, which can significantly improve the heat dissipation power and temperature uniformity performance of the heat spreader.

[0025] The spacing between the upper and lower ends of the multiple microchannels 5 is greater than that between the lower ends, which is beneficial for the return of the liquid working medium on the upper body 1, which has a larger area, to the lower body 2. A third capillary structure is provided on the surface of the microchannels 5. The third capillary structure is connected to the first capillary structure 31 and the second capillary structure 32. The third capillary structure can increase the return speed and return flow of the liquid working medium, thereby improving the heat dissipation power of the heat exchange plate.

[0026] The spacing between two adjacent microchannels 5 is the same. Since the return channel body 4 is set in a trapezoidal shape and the width of the upper part in contact with the upper body 1 is greater than the width of the lower part in contact with the lower body 2, it is beneficial to return the liquid working medium on the upper body 1, which has a larger area, to the lower body 2.

[0027] Multiple microchannels 5 are evenly distributed on both the front and back surfaces of the return channel body 4. The microchannels 5 can increase the return speed of the liquid working medium in the upper body 1, thereby increasing the heat dissipation power of the heat exchange plate.

[0028] The heat spreader also includes columns 21, with both ends of the columns 21 fixedly connected to the upper body 1 and the lower body 2, respectively. A fourth capillary structure 34 is also provided on the outer surface of the columns 21, which is connected to the first capillary structure 31 and the second capillary structure 32. During the process of the liquid medium transforming into a gaseous medium and rising, the pressure inside the closed cavity 11 increases. Multiple columns 21 can increase the strength inside the closed cavity 11, effectively preventing deformation or cracking of the heat spreader and extending its service life. The fourth capillary structure 34 can promote the return of more liquid working medium to the lower body 2, improving the heat dissipation power of the heat spreader. The main function of the columns 21 is to enhance the compressive strength between the upper body 1 and the lower body 2. The fourth capillary structure 34, connected to the first capillary structure 31 and the second capillary structure 32, can increase the adsorption capacity of the liquid working medium, allowing the liquid working medium to return to the bottom of the lower body 2 as quickly as possible, thereby improving the heat dissipation power of the heat spreader.

[0029] The column 21 can be solid or hollow, depending on actual needs. The column 21 has one or more of the following cross-sectional structures: circular, annular, or frustum.

[0030] In this embodiment, an irregularly shaped return channel heat sink, a heat spreader plate, and a heat sink 7 are provided. The heat sink 7 is located above the heat spreader plate, and its working principle is the same as described above, so it will not be repeated here.

[0031] In summary, the irregularly shaped reflux channel heat exchanger and radiator provided by this utility model, compared with traditional heat exchangers, have two types of reflux loops. First, the liquid working medium flows back to the lower body along the first capillary structure and the second capillary structure. Second, by adding a reflux channel body, multiple microchannels for the reflux of the working medium are provided on the reflux channel body to help the liquid working medium flow back to the lower body. This repeated circulation continuously transfers the heat from the heat source, which is then dissipated by the heat sink above the heat exchanger, ultimately transferring the heat from the heat source to achieve the effect of heat dissipation and cooling. The multiple reflux loops make the reflux speed of the liquid working medium faster and the reflux volume increased, significantly improving the heat dissipation power and temperature uniformity performance of the heat exchanger.

[0032] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above-described invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A non-circular reflux channel heat exchanger, characterized in that: It includes an upper body, a lower body, a first capillary structure, a second capillary structure, and a return channel body. The first capillary structure is located on the inner surface of the upper body, and the second capillary structure is located on the inner surface of the lower body. The upper body and the lower body form a closed cavity, and a working medium is provided inside the closed cavity. The return channel body is provided with multiple microchannels for the return of the working medium. The upper end of the microchannel is connected to the upper body and the lower end is connected to the lower body.

2. The irregularly shaped return channel heat exchanger plate according to claim 1, characterized in that: The return channel body is configured in the shape of a trapezoid, with the upper base of the trapezoid located on the lower body and the lower base located on the upper body, and the length of the upper base being less than the length of the lower base.

3. The irregularly shaped return channel heat exchanger plate according to claim 1, characterized in that: The microchannel has a greater channel spacing at its upper end than at its lower end, and a third capillary structure is provided on the surface of the microchannel, which is connected to the first capillary structure and the second capillary structure.

4. The irregularly shaped return channel heat exchanger plate according to claim 1, characterized in that: The spacing between two adjacent microchannels is the same.

5. The irregularly shaped return channel heat exchanger plate according to claim 1, characterized in that: The return channel body has multiple microchannels evenly distributed on both the front and back sides.

6. The irregularly shaped return channel heat exchanger plate according to claim 1, characterized in that: The temperature distribution plate also includes a column, with its two ends fixedly connected to the upper body and the lower body, respectively. A fourth capillary structure is also provided on the outer surface of the column, and the fourth capillary structure is connected to the first capillary structure and the second capillary structure.

7. The irregularly shaped return channel heat exchanger plate according to claim 6, characterized in that: The columns can be solid or hollow.

8. A radiator with an irregularly shaped return channel, characterized in that: Includes a heat spreader, wherein the heat spreader is the irregular reflux channel heat spreader as described in any one of claims 1-7.

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