High-reliability double-layer cold plate

Abstract

The invention belongs to the technical field of cold plate structure design, and relates to a high-reliability double-layer cold plate. The heat exchanger comprises a lower-layer inlet and outlet threaded connector, a lower-layer end socket, an upper panel, an upper-layer inlet and outlet threaded connector, an upper-layer end socket, a middle panel, a lower panel, an upper-layer base plate, an upper-layer cushion block, an upper-layer fin, an upper frame sealing strip, an upper-layer supporting strip, a lower-layer cushion block, a lower-layer fin, a lower-layer base plate, a lower frame sealing strip and a lower-layer supporting strip. A plurality of fins are arranged on upper and lower runners of the cold plate, the upper and lower runners are symmetrically distributed, the runner width is uniform, uniform distribution of working medium flow velocity at each position of the internal runner during normal work of the cold plate is ensured, flow resistance is reduced, and the heat exchange effect is improved. As heat exchange cannot be carried out in the area below the inlet and outlet position of the upper-layer runner, the purpose of weight reduction is achieved by adding the channels in the position.

Description

Technical Field

[0001] The invention belongs to the technical field of cold plate structure design and relates to a high-reliability double-layer cold plate. Background Art

[0002] A cold plate is a heat exchange device in a thermal control fluid circuit. Its working surface fits against the bottom or side of the heat-generating device, efficiently transferring the heat of the device to the working fluid and taking it away, thereby achieving the purpose of cooling the device. Cold plates have good durability, excellent heat resistance, good heat reflectivity, good welding performance, and are easy to process. They are widely used in aerospace, electronic equipment, automotive manufacturing and other fields. However, traditional cold plates are all single-layer cold plates. If a single-layer cold plate fails to operate due to a working fluid leak or other malfunction, if the cold plate is not replaced in time, the temperature of the load equipment will rise sharply in a short period of time, the performance of the load equipment will drop sharply or even fail, thereby affecting the safe and stable operation of the entire system. Summary of the Invention

[0003] Purpose of the Invention

[0004] A high-reliability double-layer cold plate is provided, which solves the technical problem that the traditional single-layer cold plate cannot be replaced in time when a failure occurs, resulting in failure of the load equipment, and greatly improves the reliability and stability of the load equipment operation.

[0005] A high-reliability double-layer cold plate adds an independent fluid passage to the traditional single-layer cold plate. The two fluid passages operate independently without interfering with each other. When the cold plate is operating normally, only the upper cold plate is fed with working fluid, and the lower cold plate does not operate without working fluid. When the upper fluid passage fails and cannot be used, the lower fluid passage is promptly activated to operate, and only the working fluid inlet and outlet positions are replaced without replacing the cold plate, thus avoiding load equipment failure due to temperature overload. In addition, both the upper and lower fluid passages are arranged with pads and support bars, which can play a supporting role, increase the structural strength of the cold plate, and improve the reliability of the cold plate's own operation.

[0006] Technical Solution

[0007] A high-reliability double-layer cold plate comprises a lower inlet and outlet threaded joint, a lower head, an upper panel, an upper inlet and outlet threaded joint, an upper head, a middle panel, a lower panel, an upper pad, an upper pad, an upper fin, an upper frame seal, an upper support strip, a lower pad, a lower fin, a lower pad, a lower frame seal and a lower support strip. The lower frame seal is arranged at the circumferential edge of the lower panel, and the lower frame seal is provided with a plurality of grooves, which divide the lower panel into a weight reduction area and a working area through the grooves; the lower layer flow channel inlet area and the lower layer flow channel outlet area on the lower panel are respectively provided with the lower pad, the lower fin is arranged on the lower panel and is located on the same layer structure as the lower frame seal, the lower pad is arranged on the lower panel to play a supporting and giving way role, the lower support strip is arranged on the lower panel, and the lower fin includes longitudinal fins and transverse fins, and the transverse fins are three in total and are respectively arranged in the lower layer flow channel inlet area, the lower flow channel outlet area and near the weight reduction area on the lower panel; longitudinal fins are arranged in the remaining position of the lower panel, and the fluid channels of adjacent longitudinal fins and transverse fins are interconnected, and the three transverse fins and the two longitudinal fins jointly form the working area of ​​the lower flow channel, and the cooling medium enters through the lower flow channel inlet area, passes through the longitudinal fins and the transverse fins, and is discharged through the lower flow channel outlet area;

[0008] The middle panel separates the upper frame seal from the lower frame seal and is located on the upper surface of the lower frame seal. The upper frame seal is arranged at the circumferential edge of the middle panel. The upper panel is provided with a laminar flow channel inlet area and an upper flow channel outlet area. An upper pad is provided near the upper flow channel inlet area and the upper flow channel outlet area. The upper pad is arranged on the middle panel to play a supporting and giving way role; the upper support strip is arranged on the middle panel, and the upper fin is arranged on the middle panel and is located on the same layer structure as the upper frame seal. The upper fin includes longitudinal fins and transverse fins. Two symmetrically distributed longitudinal fins and one transverse fin together constitute the working area of ​​the upper flow channel. The cooling medium enters the upper flow channel inlet and passes through the upper fins and is discharged from the upper flow channel outlet;

[0009] The upper panel is arranged on the upper surface of the upper frame seal, the lower inlet and outlet threaded joints are connected to the lower head, and the two lower heads are arranged on the upper surface, respectively penetrating the lower flow channel inlet area and the lower flow channel outlet area; the upper inlet and outlet threaded joints are connected to the upper head, and the two upper heads are arranged on the upper surface, respectively penetrating the upper flow channel inlet area and the upper flow channel outlet area;

[0010] When the working fluid leaks in the upper flow channel and the cold plate cannot operate normally, it switches to the lower flow channel to work.

[0011] Furthermore, the installation positions of the lower pad and the upper pad are determined by the hole positions of the heat dissipation device.

[0012] Furthermore, there are a plurality of upper support bars and lower support bars, which are evenly distributed on the middle panel and the lower panel respectively.

[0013] The average height of the upper fins of the cold plate is 0.03mm to 0.05mm higher than the average height of the upper pad, the upper pad, the upper frame seal and the upper support bar.

[0014] The average height of the lower fins of the cold plate is 0.03mm to 0.05mm higher than the average height of the lower pad, the lower pad, the lower frame seal and the lower support strip.

[0015] The inlet and outlet threaded joints of the lower layer of the cold plate and the lower layer sealing head are welded by manual argon arc welding, and the material grade of the welding wire is 5A06.

[0016] The inlet and outlet threaded joints on the upper layer of the cold plate and the upper head are welded by manual argon arc welding, and the material grade of the welding wire is 5A06.

[0017] The material used for the upper fin and the lower fin of the cold plate is 3003-O.

[0018] The material used for the cold plate lower head, upper panel, upper head, middle panel, lower panel, upper pad, upper pad, upper frame seal, upper support strip, lower pad, lower pad, lower pad, lower frame seal and lower support strip is 3A21-O.

[0019] The cold plate is integrally welded by vacuum brazing except for the lower layer inlet and outlet threaded joints and the upper layer inlet and outlet threaded joints.

[0020] The upper fin and the lower fin of the cold plate are both rectangular serrated fins.

[0021] The cold plate is divided into two layers of independent flow channels, the two flow channels work independently without interfering with each other, and the layout forms of the upper and lower layers of flow channels are different.

[0022] The height of the upper backing plate of the cold plate is 9.5 mm, and the height of the lower backing plate is 15.5 mm.

[0023] When the cold plates are working normally, only the upper cold plate is fed with working fluid for operation, while the lower cold plate is not fed with working fluid and does not operate.

[0024] When the upper fluid passage of the cold plate fails to work due to leakage of working fluid or damage of threaded joints, the lower fluid passage can be promptly activated to work. Only the inlet and outlet positions of the working fluid need to be replaced without replacing the cold plate, thereby avoiding failure of the load equipment due to temperature overload.

[0025] The beneficial effects of this application are:

[0026] 1. Greatly improved the reliability and stability of load equipment operation

[0027] In addition to the traditional single-layer cold plate, an independent fluid path is added. The two fluid paths operate independently without interfering with each other. If the upper fluid path fails and becomes unusable, the lower fluid path is immediately activated. Only the fluid inlet and outlet positions need to be replaced, without replacing the cold plate, thus preventing load equipment from malfunctioning due to temperature overload.

[0028] 2. The internal flow channels are symmetrically distributed, with uniform width, and the lower layer flow channels are designed to reduce weight.

[0029] The cold plate's upper and lower channels are equipped with multiple fins, which are symmetrically distributed and have uniform channel width. This ensures uniform flow rate distribution across the internal channels during normal operation, reducing flow resistance and improving heat transfer. Because heat transfer isn't possible in the area below the inlet and outlet of the upper channel, slots have been added to reduce weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is the cold plate structure diagram;

[0031] Figure 2 Schematic diagram of the flow channel composition of the upper internal structure of the cold plate;

[0032] Figure 3 Schematic diagram of the flow channel composition of the internal structure of the lower layer of the cold plate;

[0033] Figure 4 Schematic diagram of internal fins;

[0034] Figure 5 Schematic diagram of the bottom plate structure;

[0035] Figure 6 Schematic diagram of the upper pad structure;

[0036] Figure 7 Schematic diagram of the cross-sectional structure of the inlet and outlet of the lower cold plate;

[0037] Figure 8 Schematic diagram of the cross-sectional structure of the inlet and outlet of the upper cold plate;

[0038] In the figure, 1 is the lower inlet and outlet threaded joint, 2 is the lower head, 3 is the upper panel, 4 is the upper inlet and outlet threaded joint, 5 is the upper head, 6 is the middle panel, 7 is the lower panel, 8 is the upper pad, 9 is the upper pad, 10 is the upper fin, 11 is the upper frame seal, 12 is the upper support bar, 13 is the lower pad, 14 is the lower fin, 15 is the lower pad, 16 is the lower frame seal, and 17 is the lower support bar. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the embodiments of the present invention. In the examples, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. The embodiments described below by reference are illustrative and intended to be used to explain the present invention, and should not be understood as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The following is a detailed description in conjunction with the embodiments of the present invention.

[0040] It includes a lower inlet and outlet threaded joint 1, a lower head 2, an upper panel 3, an upper inlet and outlet threaded joint 4, an upper head 5, a middle panel 6, a lower panel 7, an upper pad 8, an upper pad 9, an upper fin 10, an upper frame seal 11, an upper support bar 12, a lower pad 13, a lower fin 14, a lower pad 15, a lower frame seal 16 and a lower support bar 17. The lower frame seal 16 is arranged at the circumferential edge of the lower panel 7, and a plurality of grooves are provided on the lower frame seal 16, which divide the lower panel 7 into a weight reduction area and a working area through the grooves; the lower flow channel inlet area and the lower flow channel outlet area on the lower panel 7 are respectively provided with the lower pad 15, the lower fin 14 is arranged on the lower panel 7, and is located on the same layer structure as the lower frame seal 16, the lower pad 13 is arranged on the lower panel 7, and plays a supporting and giving way role, and the lower support bar 17 is arranged On the lower panel 7, the lower fins 14 include longitudinal fins and transverse fins. There are three transverse fins in total, which are respectively arranged at the lower flow channel inlet area, the lower flow channel outlet area and the vicinity of the weight reduction area on the lower panel 7; longitudinal fins are arranged at the remaining positions on the lower panel 7, and the fluid channels of adjacent longitudinal fins and transverse fins are interconnected. The three transverse fins and the two longitudinal fins together form the working area of ​​the lower flow channel. After the cooling medium enters through the lower flow channel inlet area, it passes through the longitudinal fins and the transverse fins and is discharged through the lower flow channel outlet area;

[0041] The middle panel 6 separates the upper frame seal 11 from the lower frame seal 16 and is located on the upper surface of the lower frame seal 16. The upper frame seal 11 is arranged at the circumferential edge of the middle panel 6. The upper panel 3 is provided with a laminar flow channel inlet area and an upper flow channel outlet area. An upper pad 8 is provided near the upper flow channel inlet area and the upper flow channel outlet area. The upper pad 9 is provided on the middle panel 6 to support and give way; the upper support bar 12 is arranged on the middle panel 6, and the upper fin 10 is provided on the middle panel 6 and is located on the same layer structure as the upper frame seal 11. The upper fin 10 includes longitudinal fins and transverse fins. Two symmetrically distributed longitudinal fins and one transverse fin together constitute the working area of ​​the upper flow channel. The cooling medium enters the upper flow channel inlet and passes through the upper fin 10 and is discharged from the upper flow channel outlet;

[0042] In a certain embodiment of the invention, the upper panel 3 is arranged on the upper surface of the upper frame seal 11, the lower inlet and outlet threaded joints 1 are connected to the lower head 2, and the two lower heads 2 are both arranged on the upper surface 3, respectively penetrating the lower flow channel inlet area and the lower flow channel outlet area; the upper inlet and outlet threaded joints 4 are connected to the upper head 5, and the two upper heads 5 are both arranged on the upper surface 3, respectively penetrating the upper flow channel inlet area and the upper flow channel outlet area;

[0043] In a certain embodiment of the invention, when the working fluid leaks in the upper flow channel and the cold plate cannot operate normally, it switches to the lower flow channel to work.

[0044] In a certain embodiment of the invention, the installation positions of the lower pad 13 and the upper pad 9 are determined by the hole positions of the heat dissipation device, and play the role of giving way and supporting.

[0045] In a certain embodiment of the invention, there are multiple upper support bars 12 and lower support bars 17, which are evenly distributed on the middle panel 6 and the lower panel 7, respectively, to play the role of support, diversion and stability. During vacuum brazing, the internal cavity of the cold plate can be prevented from deformation, and during operation, the cooling medium can be ensured to be distributed as evenly as possible in the entire flow channel.

[0046] In a certain embodiment of the invention, the average height of the upper fin 10 of the cold plate is 0.03mm to 0.05mm higher than the average height of the upper pad 8, the upper pad 9, the upper frame seal 11 and the upper support bar 12, thereby improving the success rate of vacuum brazing and ensuring that the cooling medium inside the cold plate does not leak after vacuum brazing.

[0047] In a certain embodiment of the invention, the average height of the lower fins 14 of the cold plate is 0.03mm to 0.05mm higher than the average height of the lower pad 13, the lower pad 15, the lower frame seal 16 and the lower support bar 17, thereby improving the success rate of vacuum brazing and ensuring that the cooling medium inside the cold plate does not leak after vacuum brazing.

[0048] In a certain embodiment of the invention, the cold plate lower inlet and outlet threaded joints 1 and the lower head 2 are welded by manual argon arc welding, and the welding wire is made of 5A06 material, which can improve the welding strength and reduce the possibility of breakage.

[0049] In a certain embodiment of the invention, the cold plate upper inlet and outlet threaded joints 4 and the upper head 5 are welded by manual argon arc welding, and the material grade of the welding wire is 5A06, which can improve the welding strength and reduce the possibility of breakage.

[0050] In a certain embodiment of the invention, the material used for the upper fin 10 and the lower fin 14 of the cold plate is 3003-O, which has good heat exchange performance and is light in weight.

[0051] In a certain embodiment of the invention, the material used for the cold plate lower head 2, upper panel 3, upper head 5, middle panel 6, lower panel 7, upper pad 8, upper pad 9, upper frame seal 11, upper support bar 12, lower pad 13, lower pad 15, lower frame seal 16 and lower support bar 17 is 3A21-O, which has good heat exchange performance and light weight.

[0052] In a certain embodiment of the invention, except for the lower inlet and outlet threaded joints 1 and the upper inlet and outlet threaded joints 4, the rest of the cold plate is welded integrally by vacuum brazing, which is a low-cost and mature technology.

[0053] In a certain embodiment of the invention, the upper fin 10 and the lower fin 14 of the cold plate are both rectangular serrated fins. The rectangular serrated fins have better heat exchange performance than straight-through fins.

[0054] In a certain embodiment of the invention, the cold plate is divided into two independent flow channels, the two flow channels work independently and do not interfere with each other. The layout of the upper and lower layers of flow channels is different, but both are symmetrically distributed on the left and right, and each part is easy to process and install.

[0055] In a certain embodiment of the invention, the height of the upper pad 8 of the cold plate is 9.5 mm, and the height of the lower pad 15 is 15.5 mm. Since the upper pad 8 only needs to pass through the upper panel 3, and the lower pad 15 needs to pass through the middle panel 6, the upper frame seal 11 and the upper panel 3, the thickness of the middle panel 6 is 1 mm, and the thickness of the upper frame seal 11 is 5 mm, the height of the lower pad 15 is 6 mm higher than the upper pad 8.

[0056] In a certain embodiment of the invention, when the cold plate is working normally, only the upper cold plate is fed with working fluid and operates, while the lower cold plate is not fed with working fluid and does not operate.

[0057] When the upper fluid passage of the cold plate fails to work due to leakage of working fluid or damage of threaded joints, the lower fluid passage can be promptly activated to work. Only the inlet and outlet positions of the working fluid need to be replaced without replacing the cold plate, thereby avoiding failure of the load equipment due to temperature overload.

[0058] The present invention provides a cold plate, such as Figure 1 、 Figure 2 and Figure 3 Figure 2 shows the external and internal structures of a high-reliability double-layer cold plate according to this embodiment. The external structure of the cold plate includes a lower inlet and outlet threaded joint 1, a lower end cap 2, an upper panel 3, an upper inlet and outlet threaded joint 4, an upper end cap 5, a middle panel 6, a lower panel 7, an upper frame seal 11, and a lower frame seal 16. The internal structure of the cold plate includes an upper pad 8, an upper gasket 9, an upper fin 10, an upper support bar 12, a lower gasket 13, a lower fin 14, a lower pad 15, and a lower support bar 17. The lower inlet and outlet threaded joint 1 and the lower end cap 2, and the upper inlet and outlet threaded joint 4 and the upper end cap 5 are welded together using argon arc welding, while the remaining components are integrally welded using vacuum brazing. Multiple threaded holes are provided on the surface of the cold plate, through which the load device is fastened to the cold plate.

[0059] The heights of the upper pad 8, upper gasket 9, upper fins 10, and upper support strips 12 match the height of the upper frame seal 11. The heights of the lower gasket 13, lower fin 14, lower pad 15, and lower support strip 17 match the height of the lower frame seal 16. The average height of the upper fin 10 is 0.03mm to 0.05mm higher than that of the upper pad 8, upper gasket 9, upper frame seal 11, and upper support strip 12, respectively. The average height of the lower fin 14 is 0.03mm to 0.05mm higher than that of the lower gasket 13, lower pad 15, lower frame seal 16, and lower support strip 17, respectively. The height of the upper pad 8 is 9.5mm, and the height of the lower pad 15 is 15.5mm. The cold plate is divided into two independent fluid passages, upper and lower. The two fluid passages operate independently and do not interfere with each other, and the internal flow paths of the upper and lower fluid passages are arranged differently.

[0060] The working principle of the cold plate is as follows:

[0061] When the upper fluid path of the cold plate is operating normally, the heat generated by the load equipment is transferred to the upper fins 10 through the upper panel 3. The cooling medium flows through the upper inlet and outlet threaded joints 4, the lower head 5, the upper gasket 8, and the upper fins 10 in sequence, removing the heat from the upper fins 10 to achieve the purpose of cooling the load equipment. When the upper fluid path of the cold plate fails and cannot operate normally, the position of the fluid inlet and outlet is replaced, and the lower fluid path is activated to operate. The heat generated by the load equipment is transferred to the lower fins 14 through the upper panel 3, the upper fins 10, and the middle panel 6. The cooling medium flows through the lower inlet and outlet threaded joints 1, the lower head 2, the lower gasket 15, and the lower fins 14 in sequence, removing the heat from the lower fins 14, which can also reduce the temperature of the load equipment and ensure its safe and stable operation.

[0062] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and unless defined as such, they will not be interpreted in an idealized or overly formal sense. The specific embodiments described above further describe the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Within the spirit and principles of the present invention, any person skilled in the art may use the technical content disclosed above to change or modify it into an equivalent embodiment of an equivalent change and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the content of the technical solution of the present invention, any modification, equivalent replacement, improvement, etc. made should be included in the scope of protection of the present invention.

Claims

1. A high reliability double-layer cold plate, characterized in that: It comprises a lower inlet and outlet threaded joint, a lower head, an upper panel, an upper inlet and outlet threaded joint, an upper head, a middle panel, a lower panel, an upper pad, an upper pad block, an upper fin, an upper frame seal, an upper support strip, a lower pad block, a lower fin, a lower pad, a lower frame seal and a lower support strip; the lower frame seal is arranged at the circumferential edge of the lower panel, and a plurality of grooves are arranged on the lower frame seal, and the lower panel is divided into a weight reduction area and a working area through the grooves; the lower flow channel inlet area and the lower flow channel outlet area on the lower panel are respectively provided with the lower pad; the lower fin is arranged on the lower panel and is located at the bottom of the lower frame seal On the same layer structure, the lower pad is arranged on the lower panel to play a supporting and giving way role. The lower support bar is arranged on the lower panel. The lower fins include longitudinal fins and transverse fins. There are three transverse fins in total, which are respectively arranged in the lower channel inlet area, the lower channel outlet area and near the weight reduction area on the lower panel; longitudinal fins are arranged in the remaining position on the lower panel, and the fluid channels of adjacent longitudinal fins and transverse fins are interconnected. The three transverse fins and the two longitudinal fins jointly form the working area of ​​the lower channel. After the cooling medium enters through the lower channel inlet area, it passes through the longitudinal fins and the transverse fins and is discharged through the lower channel outlet area.

2. The cold plate according to claim 1, characterized in that The middle panel separates the upper frame seal from the lower frame seal and is located on the upper surface of the lower frame seal. The upper frame seal is arranged at the circumferential edge of the middle panel. The upper panel is provided with a laminar flow channel inlet area and an upper flow channel outlet area. An upper pad is provided near the upper flow channel inlet area and the upper flow channel outlet area. The upper pad is arranged on the middle panel to play a supporting and giving way role; the upper support strip is arranged on the middle panel, and the upper fin is arranged on the middle panel and is located on the same layer structure as the upper frame seal. The upper fin includes longitudinal fins and transverse fins. Two symmetrically distributed longitudinal fins and one transverse fin together constitute the working area of ​​the upper flow channel. The cooling medium enters the upper flow channel inlet and passes through the upper fins before being discharged from the upper flow channel outlet.

3. The cold plate according to claim 2, characterized in that The upper panel is arranged on the upper surface of the upper frame seal, the lower inlet and outlet threaded joints are connected to the lower head, and the two lower heads are arranged on the upper surface, respectively penetrating the lower flow channel inlet area and the lower flow channel outlet area; the upper inlet and outlet threaded joints are connected to the upper head, and the two upper heads are arranged on the upper surface, respectively penetrating the upper flow channel inlet area and the upper flow channel outlet area.

4. The cold plate according to claim 3, characterized in that When the working fluid leaks in the upper flow channel and the cold plate cannot operate normally, it switches to the lower flow channel to work.

5. The cold plate according to claim 4, characterized in that The installation positions of the lower pads and the upper pads are determined by the hole positions of the heat dissipation device; there are a plurality of upper support bars and lower support bars, which are evenly distributed on the middle panel and the lower panel respectively.

6. The cold plate according to claim 5, characterized in that The average height of the upper fins of the cold plate is 0.03mm to 0.05mm higher than the average height of the upper pad, upper pad block, upper frame seal and upper support bar; the average height of the lower fins of the cold plate is 0.03mm to 0.05mm higher than the average height of the lower pad, lower pad, lower frame seal and lower support bar; the lower inlet and outlet threaded joints and the lower head of the cold plate are welded by manual argon arc welding, and the material grade of the welding wire is 5A06; the upper inlet and outlet threaded joints and the upper head of the cold plate are welded by manual argon arc welding, and the material grade of the welding wire is 5A06; the material used for the upper fins and lower fins of the cold plate is 3003-O.

7. The cold plate according to claim 6, characterized in that The material used for the cold plate lower head, upper panel, upper head, middle panel, lower panel, upper pad, upper pad, upper frame seal, upper support strip, lower pad, lower pad, lower pad, lower frame seal and lower support strip is 3A21-O.

8. The cold plate according to claim 7, characterized in that The cold plate is integrally welded by vacuum brazing except for the lower inlet and outlet threaded joints and the upper inlet and outlet threaded joints; the upper fin and the lower fin of the cold plate are both rectangular serrated fins; the cold plate is divided into two independent flow channels, the two flow channels work independently without interfering with each other, and the layout of the upper and lower flow channels is different.

9. The cold plate according to claim 8, characterized in that The height of the upper backing plate of the cold plate is 9.5 mm, and the height of the lower backing plate is 15.5 mm.

10. The cold plate according to claim 9, characterized in that When the upper fluid passage of the cold plate fails to work due to leakage of working fluid or damage of the threaded joint, the lower fluid passage can be promptly activated to work, and only the inlet and outlet positions of the working fluid need to be replaced without replacing the cold plate, thereby avoiding failure of the load equipment due to temperature overload.

Images