Plate-fin radiating device and liquid cooling radiator

Abstract

The utility model discloses a plate fin heat dissipation device and a liquid cooling radiator, including a first liquid separator, a second liquid separator, a plurality of harmonica-shaped tubes and a plurality of heat dissipation fins, the first liquid separator is provided with a first cavity, the second liquid separator is provided with a second cavity, the first liquid separator and the second liquid separator are respectively located at two opposite sides of the harmonica-shaped tubes, and the heat dissipation fins are arranged in the first cavity and the second cavity. The harmonica-shaped tube comprises an upper cover plate and a lower cover plate, the radiating fins are fixedly connected to the upper cover plate or the lower cover plate, heat of a heat source is transferred to the radiating fins through flowing of liquid in the first cavity and the second cavity, and the radiating fins are arranged in the first cavity and the second cavity. Heat of the heat source is continuously diffused out through the heat dissipation fins, and therefore the heat dissipation efficiency of the heat dissipation device is improved.

Description

Technical Field

[0001] This utility model relates to the field of radiator technology, and in particular to a plate-fin heat dissipation device and a liquid-cooled radiator. Background Technology

[0002] To meet the ever-increasing computing power demands of emerging markets such as 5G, AI, and automotive electronics, chip integration is constantly improving, leading to a corresponding increase in power consumption. Increased power consumption generates heat, and when the heat reaches a certain level, the chip may malfunction or even be damaged, while the space allocated for heat dissipation systems is becoming increasingly limited. How to achieve efficient heat dissipation has become a critical issue that the entire industry urgently needs to address. Since liquid cooling offers significantly better heat dissipation performance than metal or air cooling, liquid cooling technology is increasingly being applied to high-power, high-performance computing chips. Existing plate-fin heat sinks are generally used in air-cooled radiators. Their harmonica-shaped tubes are manufactured using a one-time copper extrusion process, resulting in uneven tube wall thickness. Areas with thinner walls lack reliability and pose a risk of perforation and leakage, making them unsuitable for liquid-cooled radiator products. Therefore, improving the heat dissipation efficiency of plate-fin heat sinks has become a pressing issue in this field. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this utility model is to provide a plate-fin heat dissipation device and a liquid-cooled radiator. By the flow of liquid in the first and second cavities, the heat from the heat source is transferred to the heat dissipation fins, and the heat from the heat source is continuously diffused away by the heat dissipation fins, thereby improving the heat dissipation efficiency of the heat dissipation device.

[0004] To achieve the above objectives, this utility model provides a plate-fin heat dissipation device, including a first distributor, a second distributor, multiple harmonica tubes, and multiple heat dissipation fins. The first distributor has a first cavity, and the second distributor has a second cavity. The first distributor and the second distributor are located on opposite sides of the harmonica tubes. The harmonica tubes include an upper cover plate and a lower cover plate, and the multiple heat dissipation fins are fixedly connected to the upper cover plate or the lower cover plate.

[0005] Preferably, the harmonica tube further includes at least one partition, which is fixedly connected between the upper cover plate and the lower cover plate and divides the harmonica tube into multiple slots. One end of each slot communicates with the first cavity and the other end communicates with the second cavity. The multiple slots are not interconnected.

[0006] Preferably, when there are more than two partitions, the partitions are arranged in parallel to each other and are evenly distributed between the upper cover plate and the lower cover plate.

[0007] Preferably, the first cavity and the second cavity are filled with liquid.

[0008] Preferably, the plate fin heat dissipation device is further provided with at least one liquid inlet and at least one liquid outlet, wherein the liquid inlet is in communication with at least one of the first cavity or the second cavity, and the liquid outlet is in communication with at least one of the first cavity or the second cavity.

[0009] Preferably, the heat dissipation fins are configured as flat plates, with multiple heat dissipation fins parallel to each other and vertically fixedly connected to the upper or lower cover plate.

[0010] Preferably, the heat dissipation fins are S-shaped and vertically fixed to the upper or lower cover plate.

[0011] Preferably, both the first and second distributors are provided with multiple support columns.

[0012] This utility model provides a liquid-cooled radiator, including a heat spreader and a plate-fin heat dissipation device.

[0013] The beneficial effects of this utility model are as follows: The plate-fin heat dissipation device provided by this utility model allows high-temperature liquid to flow into the first cavity from the inlet, and low-temperature liquid to flow out from the outlet after cooling. This allows the liquid to be used sequentially, continuously transferring and dissipating the heat from the heat source through the liquid flow. The first cavity and the second cavity are connected by a tank, allowing the liquid to continuously circulate in the first cavity, multiple tanks, and the second cavity. The heat dissipation fins continuously dissipate the heat from the harmonica tube, thereby improving the heat dissipation efficiency of the heat dissipation device. This enables it to be applied to liquid-cooled radiators, significantly improving the heat dissipation efficiency of liquid-cooled radiators. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the external structure of the plate-fin heat dissipation device in Example 1;

[0016] Figure 2 This is a schematic diagram of the internal structure of the plate-fin heat dissipation device in Example 1;

[0017] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 4 This is a schematic diagram of the harmonica tube in Example 1;

[0019] Figure 5 This is a schematic diagram of the liquid-cooled heat sink in Example 2. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] Example 1: Please refer to Figures 1 to 4 ,

[0023] A plate-fin heat dissipation device includes a first distributor 1, a second distributor 2, multiple harmonica tubes 3, and multiple heat dissipation fins 4. The first distributor 1 and the second distributor 2 are located on opposite sides of the harmonica tubes 3. The first distributor 1 is provided with a first cavity 11, and the second distributor 2 is provided with a second cavity 21. The multiple harmonica tubes 3 are arranged side by side between the first distributor 1 and the second distributor 2. The harmonica tubes 3 include an upper cover plate 31 and a lower cover plate 32. The multiple heat dissipation fins 4 are fixedly connected to the upper cover plate 31 or the lower cover plate 32.

[0024] During the heat dissipation process, the first cavity 11 and the second cavity 21 contain liquid. Of course, the liquid can be added according to actual needs, such as water and antifreeze or water. The heat source is in contact with the first distributor 1 or the second distributor 2. In this embodiment 1, the heat source is in contact with the first distributor 1, and the first cavity 11 and the second cavity 21 contain liquid. The liquid transfers heat to the harmonica tube 3, and the harmonica tube 3 further transfers heat to the heat dissipation fins 4 and the second distributor 2. The liquid in the heat dissipation fins 4 and the second distributor 2 continues to diffuse the heat away, thereby transferring the heat from the heat source. In this embodiment, the plate-fin heat dissipation device has more concentrated heat dissipation and better heat dissipation effect due to the setting of multiple harmonica tubes 3. Moreover, it can be applied to liquid-cooled heat sinks, which can greatly improve the heat dissipation efficiency of liquid-cooled heat sinks.

[0025] The harmonica tube 3 also includes at least one partition 33, which is fixedly connected between the upper cover plate 31 and the lower cover plate 32 and divides the harmonica tube 3 into multiple slots 34. One end of each slot 34 is connected to the first cavity 11 and the other end is connected to the second cavity 21. The multiple slots 34 are not connected to each other. The slots 34 are connected to the first cavity 11 and the second cavity 21 respectively, so that the liquid in the first cavity 11 and the second cavity 21 can be connected and flowed, thereby accelerating the transfer and diffusion of heat. Through the flow of liquid in the first cavity 11, the multiple slots 34 and the second cavity 21, the heat is diffused out more quickly, thereby improving the heat dissipation power of the radiator.

[0026] After the partition plate 33 and the lower cover plate 32 are fixedly connected by brazing, the upper cover plate 31 and the lower cover plate 32 are fixedly connected by diffusion welding. Unlike the existing harmonica tubes 3, which are mostly made of copper extrusion in one piece, resulting in uneven tube wall thickness after molding, the thinner wall position is not reliable enough and there is a risk of perforation and leakage, making them unsuitable for liquid cooling radiator products, in this embodiment 1, the harmonica tube 3 is divided into an upper cover plate 31, a lower cover plate 32 and multiple partition plates 33. By disassembling the harmonica tube 3 structure from a whole into multiple individual parts, and then using precise positioning brazing and diffusion welding to weld the multiple parts into a whole, it can be mass-produced, realizing the mass production of small-sized harmonica tubes 3, improving the yield rate of harmonica tubes 3, effectively preventing the risk of leakage of harmonica tubes 3, and improving the heat dissipation performance of liquid cooling radiator technology when applied to liquid cooling radiator technology.

[0027] When there are more than two partitions 33, the multiple partitions 33 are arranged in parallel to each other and are evenly distributed between the upper cover plate 31 and the lower cover plate 32. In this embodiment, there are four partitions 33. The even distribution can make the space of the tank 34 the same, so that the cross section of the liquid flowing from the first cavity 11 to the second cavity 21 in the tank 34 is the same, thereby improving the temperature uniformity of the radiator.

[0028] The plate-fin heat dissipation device is also provided with at least one liquid inlet 51 and at least one liquid outlet 52. The liquid inlet 51 is connected to at least one of the first cavity 11 or the second cavity 21, and the liquid outlet 52 is connected to at least one of the first cavity 11 or the second cavity 21. In this embodiment, it includes one liquid inlet 51 and one liquid outlet 52. Both the liquid inlet 51 and the liquid outlet 52 are connected to the first cavity 11. The high-temperature liquid flows into the first cavity 11 from the liquid inlet 51, and the cooled low-temperature liquid flows out from the liquid outlet 52. Therefore, the liquid inlet 51 and the liquid outlet 52 can be located in the first cavity 11 and the second cavity 21, respectively. If they are located in the same cavity, they are generally located at the two ends of the cavity. For example, in this embodiment 1, the liquid inlet 51 is located at the upper end of the first cavity 11, and the liquid outlet 52 is located at the lower end of the first cavity 11.

[0029] The heat source is connected to the first distributor 1, which transfers heat to the first distributor 1. Through the inlet 51, the liquid flows into the first chamber 11. The liquid in the first chamber 11 has a higher temperature. The higher-temperature liquid flows through multiple tanks 34 and connects with the liquid in the second chamber 21. Thus, the heat is further diffused out through the heat dissipation fins 4 and the liquid in the second distributor 2, thereby reducing the temperature of the heat source and transferring the heat away. The cooled liquid flows out through the outlet 52 and continues to circulate and cool the heat source, ultimately transferring the heat away continuously to achieve the heat dissipation effect.

[0030] The heat dissipation fins 4 are S-shaped and vertically fixed to the upper cover plate 31 or the lower cover plate 32. In this embodiment 1, the uppermost row of heat dissipation fins 4 is fixed to the upper cover plate 31, the lowermost row of heat dissipation fins 4 is fixed to the lower cover plate 32, and the middle row of heat dissipation fins 4 is fixedly connected between the upper cover plate 31 or the lower cover plate 32. The heat dissipation fins 4 are mainly used to dissipate the heat from the harmonica tube 3. The densely arranged heat dissipation fins 4 can effectively increase the contact area between the heat dissipation fins 4 and the harmonica tube 3, and at the same time increase the heat dissipation area of ​​the heat dissipation fins 4, thereby transferring heat away more quickly and improving the heat dissipation efficiency of the heat dissipation device. Of course, depending on the actual heat dissipation power requirements, the heat dissipation fins 4 can also be set as flat plates, with multiple heat dissipation fins 4 parallel to each other and vertically fixed to the upper cover plate 31 or the lower cover plate 32, mainly used to dissipate the heat of the liquid in the tank 34, which will not be elaborated here.

[0031] The first liquid dispenser 1 and the second liquid dispenser 2 are each provided with multiple support columns 6. The support columns 6 are used to strengthen the strength of the first cavity 11 and the second cavity 21 and reduce the risk of the first cavity 11 and the second cavity 21 rupturing during liquid flow.

[0032] Example 2: A liquid-cooled heat sink includes a heat spreader 7, a heat dissipation mechanism 8, and a finned heat dissipation device. The finned heat dissipation device is the same as that in Example 1. Figure 5 As shown, the liquid-cooled heat sink in this embodiment 2 is used to dissipate heat from the chip 9. That is, the chip 9 is the heat source, and the vapor chamber 7 is a vacuum heat dissipation cavity. The vapor chamber 7 transfers the heat from the chip 9 to the heat dissipation mechanism 8. The heat dissipation mechanism 8 is connected to the liquid inlet 51 and the liquid outlet 52 through two connecting pipes 81, respectively. The heat dissipation mechanism 8 is filled with liquid and absorbs the heat from the vapor chamber 7 at a high temperature. The high-temperature liquid flows into the first distributor 1 through the liquid inlet 51 and flows from the first cavity 11 to the second cavity 21 through the groove 34 of the harmonica tube 3. The heat of the liquid is diffused away through the heat dissipation fins 4. After multiple heat diffusions through the heat dissipation fins 4 and the liquid flow in the second cavity 21, the cooler liquid flows back into the heat dissipation mechanism 8 from the liquid outlet 52, thereby achieving heat dissipation of the liquid-cooled radiator. The design of the harmonica tube 3 enables the plate-fin heat dissipation device to be applied to the field of liquid-cooled radiators, effectively preventing leakage of the harmonica tube 3. The high-temperature liquid flows into the first cavity 11 from the liquid inlet 51, and the cooled low-temperature liquid flows out from the liquid outlet 52 and re-enters the heat dissipation mechanism 8 for recycling.

[0033] In summary, the plate-fin heat dissipation device provided by this utility model, by setting the harmonica tube as an upper cover plate, a lower cover plate, and multiple partitions, and fixing them together by welding, changes the risk of perforation and leakage that exists in the existing one-piece stamping (extrusion) forming of harmonica tubes, making it usable in liquid-cooled radiators, thereby improving the heat dissipation efficiency of the radiator; by having high-temperature liquid flow into the first chamber from the inlet and low-temperature liquid flow out from the outlet after cooling, the liquid can be used sequentially, continuously transferring and dissipating the heat from the heat source through the liquid flow; by connecting the first chamber and the second chamber through the tank, the liquid continuously circulates in the first chamber, multiple tanks, and the second chamber, continuously dissipating the heat from the harmonica tube through the heat dissipation fins, thereby improving the heat dissipation efficiency of the heat dissipation device.

[0034] 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 plate-fin heat dissipation device, characterized in that: It includes a first distributor, a second distributor, multiple harmonica tubes, and multiple heat dissipation fins. The first distributor has a first cavity, and the second distributor has a second cavity. The first distributor and the second distributor are located on opposite sides of the harmonica tubes. The harmonica tubes include an upper cover plate and a lower cover plate, and the multiple heat dissipation fins are fixedly connected to the upper cover plate or the lower cover plate.

2. The plate-fin heat dissipation device according to claim 1, characterized in that: The harmonica tube also includes at least one partition, which is fixedly connected between the upper cover plate and the lower cover plate and divides the harmonica tube into multiple slots. One end of each slot communicates with the first cavity and the other end communicates with the second cavity. The multiple slots are not interconnected.

3. The plate-fin heat dissipation device according to claim 2, characterized in that: When there are more than two partitions, the partitions are arranged in parallel to each other and are evenly distributed between the upper cover plate and the lower cover plate.

4. The plate-fin heat dissipation device according to claim 1, characterized in that: The first cavity and the second cavity contain liquid.

5. The plate-fin heat dissipation device according to claim 1, characterized in that: The plate-fin heat dissipation device is further provided with at least one liquid inlet and at least one liquid outlet. The liquid inlet is connected to at least one of the first cavity or the second cavity, and the liquid outlet is connected to at least one of the first cavity or the second cavity.

6. The plate-fin heat dissipation device according to claim 1, characterized in that: The heat dissipation fins are configured as flat plates, with multiple heat dissipation fins parallel to each other and vertically fixed to the upper or lower cover plate.

7. The plate-fin heat dissipation device according to claim 1, characterized in that: The heat dissipation fins are S-shaped and vertically fixed to the upper or lower cover plate.

8. The plate-fin heat dissipation device according to claim 1, characterized in that: Both the first and second distributors are equipped with multiple support columns.

9. A liquid-cooled heat sink, characterized in that: It includes a heat spreader and a plate-fin heat dissipation device, wherein the plate-fin heat dissipation device is the plate-fin heat dissipation device according to any one of claims 1-8.

Images