Cold plate liquid cooling radiator
By designing inlet and outlet channels in the cold plate liquid cooler and using Tesla valve body components to achieve unidirectional flow of coolant, the problems of uneven chip temperature and coolant backflow are solved, thereby improving heat dissipation efficiency and system stability.
Patent Information
- Application Number
- CN202422875433.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing liquid-cooled heat sinks have problems such as uneven chip temperature and coolant backflow, resulting in poor heat dissipation and system failure.
The design incorporates inlet and outlet channels for the coolant, incorporates a Tesla valve assembly to enable unidirectional flow of the coolant, and includes multiple independent heat dissipation channels within the main body of the cold plate to ensure uniform coolant distribution and prevent backflow.
This achieves improved chip temperature uniformity and heat dissipation efficiency, avoids system failures associated with cold plate liquid cooling radiators, simplifies the internal structure, and reduces costs.
Smart Images
Figure CN223912748U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to server heat dissipation technical field especially relates to a cold plate liquid cooling radiator. BACKGROUND
[0002] The data center server liquid cooling mode generally includes two kinds of direct liquid cooling and indirect liquid cooling, for the high-power device CPU chip inside the server, usually adopts the mode of indirect liquid cooling to heat dissipation.
[0003] The current cold plate liquid cooling radiator adopts the heat dissipation fin that is arranged evenly in parallel to the length direction to heat dissipation, however, in the process that fluid flows along the length direction and exchanges heat with the fin, the temperature of the initial section cooling liquid is still relatively low, but the temperature of the cooling liquid that flows in the latter section has been raised along with the extension of length, leading to the temperature difference of the chip two ends is larger. In addition, the flow resistance of the fluid in the cold plate liquid cooling radiator from any one port to another port has no difference, when the cooling liquid in the cold plate adopts two-phase cooling liquid, there will be backflow, and then cause the system failure of the cold plate liquid cooling radiator. SUMMARY
[0004] The utility model provides a kind of cold plate liquid cooling radiator, for solving the problem of chip temperature uneven, cooling liquid backflow in cold plate, to improve heat dissipation effect.
[0005] The utility model provides a kind of cold plate liquid cooling radiator, including cold plate main part, the cold plate main part is equipped with flow channel, water inlet and water outlet, the water inlet and the water outlet are communicated with the flow channel respectively;
[0006] The flow channel includes the first layer channel and the second layer channel being arranged along the thickness direction of the cold plate main part, the first layer channel includes liquid inlet channel and liquid outlet channel, the liquid inlet channel and the liquid outlet channel are communicated with the second layer channel respectively;
[0007] The liquid inlet channel includes total liquid inlet and multiple sub liquid inlets, the total liquid inlet is communicated with the water inlet, first valve body assembly is equipped in the liquid inlet channel, and the first valve body assembly is used to make the direction of cooling liquid in the liquid inlet channel from the total liquid inlet to the sub liquid inlet flow;
[0008] The liquid outlet channel includes total liquid outlet and multiple sub liquid outlets, the total liquid outlet is communicated with the water outlet, second valve body assembly is equipped in the liquid outlet channel, and the second valve body assembly is used to make the direction of cooling liquid in the liquid outlet channel from the sub liquid outlet to the total liquid outlet flow;
[0009] The second layer channel comprises a plurality of heat dissipation flow channels arranged along the length direction of the cold plate body, the heat dissipation flow channels, the liquid inlet and the liquid outlet are arranged one by one, one end of the heat dissipation flow channel is communicated with the liquid inlet, and the other end of the heat dissipation flow channel is communicated with the liquid outlet.
[0010] The cold plate liquid cooling radiator provided by the utility model designs the flow channel as two-layer channels of upper and lower layers, when the cooling liquid enters the liquid inlet flow channel, pressure equalization can be carried out in the liquid inlet flow channel, then the cooling liquid uniformly flows to each liquid inlet, and then flows into the heat conduction flow channel from the liquid inlet. The plurality of heat conduction flow channels are independent of each other, the cooling liquid in each heat conduction flow channel can exchange heat with the area of the chip opposite to the heat conduction flow channel, so that the temperature of each area of the chip along the length direction is uniform. Since the valve body assembly is arranged in the liquid inlet flow channel and the liquid outlet flow channel, the cooling liquid flows in one direction, the backflow can be avoided, so that the cold plate liquid cooling radiator can be prevented from malfunctioning, and the heat dissipation efficiency is improved.
[0011] In some possible embodiments, the first valve body assembly comprises a plurality of first Tesla valves, the plurality of first Tesla valves are located between the total liquid inlet and the liquid inlet, and the plurality of first Tesla valves are arranged in sequence along the flow direction of the cooling liquid in the liquid inlet flow channel from the total liquid inlet to the liquid inlet.
[0012] In the embodiment, the first valve body assembly is designed as a plurality of first Tesla valves, since the Tesla valve flows smoothly in the forward flow process, the flow path is clear, the flow impedance is small, and the backflow can be better avoided. Moreover, the Tesla valve has a simple structure, and the internal structure of the cold plate liquid cooling radiator can be simplified.
[0013] In some possible embodiments, the first valve body assembly comprises a plurality of second Tesla valves, the plurality of second Tesla valves are located between the total liquid outlet and the liquid outlet, and the plurality of second Tesla valves are arranged in sequence along the flow direction of the cooling liquid in the liquid outlet flow channel from the liquid outlet to the total liquid outlet.
[0014] In the embodiment, the second valve body assembly is designed as a plurality of second Tesla valves, since the Tesla valve flows smoothly in the forward flow process, the flow path is clear, the flow impedance is small, and the backflow can be better avoided. Moreover, the Tesla valve has a simple structure, and the internal structure of the cold plate liquid cooling radiator can be simplified.
[0015] In some possible embodiments, the heat dissipation flow channel comprises at least two branch channels, the at least two branch channels are arranged along the length direction of the cold plate body, and the at least two branch channels are sequentially connected in a head-to-tail mode.
[0016] In the embodiment, the heat dissipation flow channel is designed as a plurality of branch channels connected in sequence, which can increase the heat exchange area with the chip and improve the flow speed of the cooling liquid in the branch channels, thereby improving the heat dissipation efficiency.
[0017] In some possible embodiments, a reinforcing rib is arranged between two adjacent branch channels.
[0018] In the embodiment, the reinforcing rib is arranged between two adjacent branch channels, which can not only separate the two adjacent branch channels, but also strengthen the strength of the internal structure of the cold plate body.
[0019] In some possible embodiments, a frame is further included, the frame is provided with a mounting hole for accommodating the cold plate body, and the cold plate body is mounted in the mounting hole, wherein the density of the frame is less than the density of the cold plate body.
[0020] In the embodiment, the cold plate liquid cooling radiator is designed as an assembled structure of the cold plate body and the frame, the density of the frame is less than the density of the cold plate body, the overall weight of the cold plate liquid cooling radiator can be reduced, and the impact force and pressure on the chip can be reduced, so as to protect the chip structure.
[0021] In some possible embodiments, the material of the cold plate body is copper, and the material of the frame is aluminum alloy.
[0022] In the embodiment, the material of the cold plate body is copper, which can ensure the heat conduction performance and enhance the heat exchange effect between the cold plate body and the chip. The material of the frame is aluminum alloy, which can reduce the weight and cost.
[0023] In some possible embodiments, a thermally conductive interface material layer is further included, which is arranged on the side of the cold plate body for contacting the heat generating element, so as to reduce the thermal resistance between the cold plate body and the heat generating element.
[0024] In the embodiment, the thermally conductive interface material layer is arranged, which can reduce the thermal resistance between the cold plate body and the heat generating element, thereby enhancing the heat exchange effect between the cold plate body and the heat generating element.
[0025] In some possible embodiments, the cold plate body and the frame are detachably connected.
[0026] In the embodiment, the cold plate body and the frame are detachably connected, which can facilitate the maintenance of the cold plate body and the frame respectively.
[0027] In some possible embodiments, the cold plate body is provided with mounting plates on two opposite sides respectively, and the cold plate body is connected to the frame through the mounting plates.
[0028] In the embodiment, the mounting plates are arranged on both sides of the cold plate body, so that the cold plate body is prevented from being directly connected with the frame, and the structure of the cold plate body is protected. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 A structure schematic view of a cold plate body in the embodiment of the utility model;
[0030] Figure 2 A structure schematic view of a cold plate body in the embodiment of the utility model; Figure 1 A structure sectional view of A-A in the embodiment of the utility model;
[0031] Figure 3 A partial exploded structure schematic view of a cold plate body in the embodiment of the utility model;
[0032] Figure 4 A structure schematic view of a first layer channel in the embodiment of the utility model;
[0033] Figure 5 A structure schematic view of a second layer channel in the embodiment of the utility model;
[0034] Figure 6 An exploded structure schematic view of a cold plate liquid cooling radiator in the embodiment of the utility model.
[0035] In the drawings:
[0036] 100-cold plate body; 101-inlet; 102-outlet; 110-flow channel; 111-first layer channel; 1111-liquid inlet flow channel; 11111-total liquid inlet; 11112-branch liquid inlet; 1112-liquid outlet flow channel; 11121-total liquid outlet; 11122-branch liquid outlet; 1113-first valve body assembly; 11131-first Tesla valve; 1114-second valve body assembly; 11141-second Tesla valve; 112-second layer channel; 1121-radiation flow channel; 11211-branch channel; 120-strengthening fin; 130-mounting plate; 131-first threaded hole; 200-frame; 210-mounting hole; 220-second threaded hole; 230-structure locking member; 300-thermally conductive interface material layer. DETAILED DESCRIPTION
[0037] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0038] ReferenceFigure 1 And Figure 2 The cold plate liquid cooling radiator in the embodiment of the utility model can include a cold plate body 100, the inside of the cold plate body 100 is equipped with a flow channel 110, the cold plate body 100 is also equipped with a water inlet 101 and a water outlet 102, and the water inlet 101 and the water outlet 102 are communicated with the flow channel 110 respectively. The low-temperature cooling liquid can flow into the flow channel 110 from the water inlet 101, and the low-temperature cooling liquid can exchange heat with the heating element (not shown in the figure) in the process of flowing in the flow channel 110, so as to take away the heat of the heating element, finally, the cooling liquid with the temperature rising flows out from the water outlet 102, so as to complete the heat dissipation of the heating element.
[0039] The heating element can be a CPU chip inside a server or other high-power consumption elements, and the embodiment is not limited thereto.
[0040] Referring to Figures 2 to 4 The flow channel 110 can include a first layer channel 111 and a second layer channel 112 arranged along the thickness direction of the cold plate body 100, wherein the first layer channel 111 can include an inlet flow channel 1111 and an outlet flow channel 1112. The inlet flow channel 1111 is communicated with the water inlet 101, the outlet flow channel 1112 is communicated with the water outlet 102, and the inlet flow channel 1111 and the outlet flow channel 1112 are also communicated with the second layer channel 112 respectively, so that the cooling liquid flows to the second layer channel 112 after entering the inlet flow channel 1111 from the water inlet 101, flows into the outlet flow channel 1112 after passing through the second layer channel 112, and finally flows to the water outlet 102 from the outlet flow channel 1112.
[0041] Specifically, as Figure 4 shown, the inlet flow channel 1111 can include a total inlet 11111 and a plurality of sub-inlets 11112, the total inlet 11111 is communicated with the water inlet 101, and the cooling liquid can enter the inlet flow channel 1111 from the total inlet 11111 and then flow to the plurality of sub-inlets 11112. The inlet flow channel 1111 is also equipped with a first valve body assembly 1113, which can be used to make the cooling liquid in the inlet flow channel 1111 only flow from the total inlet 11111 to the sub-inlet 11112, so as to avoid the occurrence of backflow.
[0042] Referring to Figure 4 And Figure 5The second layer channel 112 includes a plurality of heat dissipation flow channels 1121 arranged along the length direction of the cold plate body 100, and the plurality of heat dissipation flow channels 1121 are arranged one by one with the plurality of liquid distribution ports 11112, and one end of the heat dissipation flow channel 1121 is in communication with the liquid distribution port 11112. That is, the cooling liquid in the liquid inlet flow channel 1111 can enter the plurality of heat dissipation flow channels 1121 from the plurality of liquid distribution ports 11112, respectively, and the cooling liquid flowing in the heat dissipation flow channel 1121 can exchange heat with the heat generating element, thereby taking away the heat of the heat generating element.
[0043] The liquid outlet flow channel 1112 includes a total liquid outlet port 11121 and a plurality of liquid outlet ports 11122 arranged one by one with the plurality of heat dissipation flow channels 1121, and the other end of the heat dissipation flow channel 1121 is in communication with the liquid outlet port 11122. The cooling liquid after heat exchange with the heat generating element can enter the liquid outlet flow channel 1112 from the liquid outlet port 11122, and then flow to the total liquid outlet port 11121, and then flow to the water outlet 102 from the total liquid outlet port 11121.
[0044] The liquid outlet flow channel 1112 further comprises a second valve body assembly 1114, which can be used to make the cooling liquid in the liquid outlet flow channel 1112 flow only in the direction from the liquid distribution port to the total liquid outlet port 11121, so as to avoid the occurrence of backflow in the liquid outlet flow channel 1112.
[0045] In the embodiment, compared with the first layer channel 111, the second layer channel 112 is closer to the heat generating element. When the cooling liquid enters the liquid inlet flow channel 1111, it can first be evenly distributed, and then the cooling liquid in the liquid inlet flow channel 1111 can flow into the second layer channel 112 through the liquid distribution port 11112. Since the second layer channel 112 is composed of a plurality of relatively independent heat dissipation flow channels 1121, the temperature of the cooling liquid entering each heat dissipation flow channel 1121 can be ensured to be substantially the same, and then the cooling liquid in each heat dissipation flow channel 1121 exchanges heat with the heat generating element. At this time, each heat dissipation flow channel 1121 only exchanges heat with part of the area of the heat generating element, and under the condition that the temperature of the cooling liquid flowing into each heat dissipation flow channel 1121 is the same, the temperature of the heat generating element after heat exchange with the cooling liquid at both ends along the length direction can be uniform, effectively reducing the temperature difference between both ends of the heat generating element.
[0046] In addition, the valve body assemblies are arranged in the liquid inlet flow channel 1111 and the liquid outlet flow channel 1112, respectively, so that the cooling liquid in the liquid inlet flow channel 1111 and the liquid outlet flow channel 1112 can realize unidirectional flow, avoid backflow, and avoid system failure, thereby improving the heat dissipation effect of the heat generating element.
[0047] In some embodiments, asFigure 4 As shown, the first valve body assembly 1113 can include a plurality of first Tesla valves 11131, the plurality of first Tesla valves 11131 can be located between the total inlet 11111 and the branch inlet 11112, and the plurality of first Tesla valves 11131 are arranged in sequence along the flow direction of the cooling liquid from the total inlet 11111 to the branch inlet 11112. The Tesla valve flows smoothly in the forward flow process, the flow path is clear, and the flow impedance is small, which can well avoid the occurrence of backflow. In addition, since the Tesla valve has small volume and simple structure, it can not only realize the unidirectional flow of the cooling liquid, but also be beneficial to simplify the structure and reduce the cost.
[0048] The number of first Tesla valves 11131 can be designed according to actual needs, on the basis of which, the inlet flow channel 1111 can include two branch channels, both of which extend along the length direction of the cold plate body 100, and the two branch channels are connected to each other. One of the branch channels is provided with the first Tesla valve 11131, and the other branch channel is provided with a plurality of branch inlets 11112. In this way, while the first Tesla valve 11131 and the branch inlet 11112 are arranged, the size of the cold plate body 100 in the length direction can be reduced, so as to reduce the occupied space of the cold plate liquid radiator.
[0049] Further, each branch inlet 11112 can also be opposite to the inlet of the heat dissipation flow channel 1121 in the thickness direction of the cold plate body 100, so that the length of the pipeline connected between the branch inlet 11112 and the heat dissipation flow channel 1121 can be shortened, and the structure inside the cold plate body 100 can be simplified.
[0050] In some embodiments, referring back to Figure 4 , the second valve body assembly 1114 can include a plurality of second Tesla valves 11141, the plurality of second Tesla valves 11141 can be located between the total outlet 11121 and the branch outlet 11122, and the plurality of second Tesla valves 11141 are arranged in sequence along the flow direction of the cooling liquid from the branch outlet 11122 to the total outlet 11121. The Tesla valve flows smoothly in the forward flow process, the flow path is clear, and the flow impedance is small, which can well avoid the occurrence of backflow. Since the Tesla valve has small volume and simple structure, it can not only realize the unidirectional flow of the cooling liquid, but also be beneficial to simplify the structure and reduce the cost.
[0051] Similarly, the number of the second Tesla valve 11141 can also be designed according to actual needs, on the basis of which the liquid outlet flow channel 1112 can include two branch flow channels, both of which extend along the length direction of the cold plate body 100, and both of which are in communication with each other. One of the branch flow channels is provided with the second Tesla valve 11141, and the other branch flow channel is provided with a plurality of liquid outlet ports 11122. In this way, while the second Tesla valve 11141 and the liquid outlet port 11122 are arranged, the size of the cold plate body 100 in the length direction can also be reduced, so as to reduce the occupied space of the cold plate liquid radiator.
[0052] In the present embodiment, each liquid outlet port 11122 can also be directly opposite the outlet of the heat dissipation flow channel 1121 in the thickness direction of the cold plate body 100. When the liquid outlet port 11122 is in communication with the heat dissipation flow channel 1121 through a pipeline, the length of the pipeline can be shortened, thereby facilitating the simplification of the structure inside the cold plate body 100.
[0053] In some embodiments, with reference to Figure 5 , the heat dissipation flow channel 1121 can include at least two branch channels 11211, each of which is arranged along the length direction of the cold plate body 100, and each of which is sequentially connected with the other branch channel 11211 at the head and tail. At this time, among the two branch channels 11211 located at the two sides, one branch channel 11211 is in communication with the liquid inlet port 11112, and the other branch channel 11211 is in communication with the liquid outlet port 11122.
[0054] Each branch channel 11211 extends along the width direction of the cold plate body 100, so as to increase the area of the heat dissipation flow channel 1121 directly opposite the heat generating element, thereby improving the heat exchange efficiency of the heat dissipation flow channel 1121 on the heat generating element.
[0055] In addition, compared with the scheme of designing the heat dissipation flow channel 1121 as a whole flow channel directly opposite the area of the heat generating element, in the present embodiment, the heat dissipation flow channel 1121 is designed as an S-shaped flow channel structure, and the diameter of each branch channel 11211 is reduced, so as to increase the flow speed of the cooling liquid in the branch channel 11211, thereby further improving the heat exchange efficiency on the heat generating element.
[0056] As an optional embodiment, as shown in Figure 5 , the number of the flow channel 110 can be three, and the three flow channels 110 are sequentially connected at the head and tail, so that the heat dissipation flow channel 1121 is in a Z shape. At this time, while ensuring the heat exchange effect on part of the area of the heat generating element, the flow path of the cooling liquid in the heat dissipation flow channel 1121 can also be prevented from being too long, so as to avoid the large temperature difference of the cooling liquid at the two ends of the heat dissipation flow channel 1121, thereby causing the temperature of the heat generating element to be uneven.
[0057] Further, referring again to Figure 5 , Figure 5 Only the structure in which the reinforcing fin 120 is arranged between one pair of adjacent two branch channels 11211 is shown in the figure. The reinforcing fin 120 can also be arranged between the adjacent two branch channels 11211 and extend along the width direction of the cold plate body 100. The inside of the cold plate body 100 corresponding to the part of the plurality of heat dissipation channels 1121 can be provided with a containing cavity (not shown in the figure) for containing the plurality of heat dissipation channels 1121. Each heat dissipation channel 1121 is arranged in the containing cavity. At this time, the two opposite sides of the heat dissipation channel 1121 along the width direction of the cold plate body 100 can respectively abut against the containing cavity, so as to fix each heat dissipation channel 1121 in the containing cavity.
[0058] Based on this, the height of the reinforcing fin 120 can be the same as the height of the containing cavity, so that the two sides of the reinforcing fin 120 along the height direction can be connected with the top and bottom of the containing cavity, respectively. In addition, one of the two ends of the reinforcing fin 120 along the width direction of the cold plate body can be connected with the side wall of the containing cavity, and the other end can extend to the position where the adjacent two branch channels 11211 are connected, so that the adjacent two branch channels 11211 can be completely separated by the reinforcing fin 120. On the one hand, the reinforcing fin 120 can play a role of isolation between the adjacent two branch channels 11211, so as to avoid heat exchange between the adjacent two branch channels 11211 and affect the heat exchange effect on the heat generating element. On the other hand, the reinforcing fin 120 connected to the top and bottom of the containing cavity can also play a role of strengthening the structure, so as to ensure the stability of the internal structure of the cold plate body 100.
[0059] In some embodiments, referring to Figure 6 The cold plate liquid cooling radiator in the embodiment of the utility model further comprises a frame 200, the middle part of the frame 200 is provided with a mounting hole 210, the mounting hole 210 can be used for containing the cold plate body 100, and the cold plate body 100 can be connected to the frame 200 through the mounting hole 210, so that the cold plate body 100 and the frame 200 can be assembled into an integral structure.
[0060] The cold plate body 100 and the frame 200 are detachably connected, so that the cold plate body 100 and the frame 200 can be maintained respectively. Exemplarily, the cold plate body 100 and the frame 200 can be connected by screws. In a specific implementation, the opposite sides of the cold plate body 100 can be respectively provided with mounting plates 130, and the mounting plates 130 are provided with first threaded holes 131. When the cold plate body 100 is located in the mounting hole 210, the mounting plates 130 on the two sides can be lapped on the frame 200. The frame 200 is provided with second threaded holes 220 corresponding to the first threaded holes 131. When the mounting plates 130 are lapped on the frame 200, screws can be screwed into the first threaded holes 131 and then screwed into the second threaded holes 220, so as to complete the assembly of the cold plate body 100 and the frame 200.
[0061] In the embodiment, the density of the frame 200 is less than the density of the cold plate body 100. Exemplarily, the material of the cold plate body 100 can be copper, and the material of the frame 200 can be aluminum alloy. In addition, the cold plate body 100 can be a structure welded by copper material, and the frame 200 can be a structure welded by aluminum alloy material, so as to respectively improve the structural strength of the two. It can be understood that, since the frame 200 is lighter in weight, when the frame 200 and the cold plate body 100 are assembled, the overall weight of the cold plate liquid cooling radiator can be reduced. In addition, the cold plate body 100 adopts copper material, which can ensure good heat conduction performance and thus ensure heat dissipation performance.
[0062] Compared with the existing cold plate liquid cooling radiator which is integrally welded by copper material as a base material, in the embodiment, the material of part of the structure is designed as lighter aluminum alloy, which not only can reduce the cost, but also can reduce the weight of the cold plate liquid cooling radiator. When the cold plate liquid cooling radiator is installed on the heat generating element as a whole, the pressure and impact force on the heat generating element can be reduced, and the heat generating element can be protected from damage.
[0063] Further, as shown in Figure 6 The frame 200 can be installed on the heat generating element through the plurality of structural locking members 230. The structural locking members 230 are arranged on the frame 200 instead of the cold plate body 100, which is conducive to maintaining the structural stability of the cold plate body 100.
[0064] In addition, as shown in Figure 6As shown, the cold plate body 100 is also provided with a thermally conductive interface material layer 300 on the side for contacting the heat generating element, which can be used to fill the microscopic gap between the cold plate body 100 and the heat generating element when the cold plate liquid cooling radiator is installed on the heat generating element, so as to reduce the thermal resistance between the cold plate body 100 and the heat generating element, so as to better enable the cooling liquid in the cold plate body 100 to exchange heat with the heat generating element.
[0065] The thermally conductive interface material layer 300 can cover the entire surface of the cold plate body 100 towards the heat generating element, so as to better reduce the thermal resistance.
[0066] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies thereof, the present application also intends to include these modifications and variations.
Claims
1. A cold plate liquid cooling heat sink, characterized by, The cold plate body is provided with a flow channel, a water inlet and a water outlet, and the water inlet and the water outlet are communicated with the flow channel respectively; The flow channel comprises a first layer channel and a second layer channel arranged along the thickness direction of the cold plate body, the first layer channel comprises an inlet flow channel and an outlet flow channel, and the inlet flow channel and the outlet flow channel are communicated with the second layer channel respectively; The inlet flow channel comprises a total inlet and a plurality of sub-inlets, the total inlet is communicated with the water inlet, and a first valve body assembly is arranged in the inlet flow channel, the first valve body assembly is used to make the cooling liquid in the inlet flow channel flow from the total inlet to the sub-inlet; The outlet flow channel comprises a total outlet and a plurality of sub-outlets, the total outlet is communicated with the water outlet, and a second valve body assembly is arranged in the outlet flow channel, the second valve body assembly is used to make the cooling liquid in the outlet flow channel flow from the sub-outlet to the total outlet; The second layer channel comprises a plurality of heat dissipation flow channels arranged along the length direction of the cold plate body, the heat dissipation flow channels, the sub-inlets and the sub-outlets are arranged one by one, one end of the heat dissipation flow channel is communicated with the sub-inlet, and the other end of the heat dissipation flow channel is communicated with the sub-outlet.
2. The cold plate liquid cooling heat sink of claim 1, wherein, The first valve body assembly comprises a plurality of first Tesla valves, the plurality of first Tesla valves are arranged between the total inlet and the sub-inlet, and the plurality of first Tesla valves are arranged in sequence along the flow direction of the cooling liquid in the inlet flow channel from the total inlet to the sub-inlet.
3. The cold plate liquid cooling heat sink of claim 1 or 2, wherein, The first valve body assembly comprises a plurality of second Tesla valves, the plurality of second Tesla valves are arranged between the total outlet and the sub-outlet, and the plurality of second Tesla valves are arranged in sequence along the flow direction of the cooling liquid in the outlet flow channel from the sub-outlet to the total outlet.
4. The cold plate liquid cooling heat sink of claim 1, wherein, The heat dissipation flow channel comprises at least two branch channels, the at least two branch channels are arranged along the length direction of the cold plate body, and the at least two branch channels are sequentially connected in head-to-tail mode.
5. The cold plate liquid cooling heat sink of claim 4, wherein, A reinforcing rib is arranged between adjacent two branch channels.
6. The cold plate liquid cooling heat sink of claim 1, wherein, A frame is further arranged, the middle part of the frame is provided with a mounting hole for accommodating the cold plate body, and the cold plate body is mounted in the mounting hole, wherein the density of the frame is less than the density of the cold plate body.
7. The cold plate liquid cooling heat sink of claim 6, wherein, The material of the cold plate body is copper, and the material of the frame is aluminum alloy.
8. The cold plate liquid cooling heat sink of claim 6, wherein, A heat-conducting interface material layer is further arranged on the side of the cold plate body used for contacting the heat-generating element, so as to reduce the thermal resistance between the cold plate body and the heat-generating element.
9. The cold plate liquid cooling heat sink of claim 6, wherein, The cold plate body and the frame are detachably connected.
10. The cold plate liquid cooling heat sink of claim 9, wherein, Opposite sides of the cold plate body are respectively provided with mounting plates, and the cold plate body is connected to the frame through the mounting plates.