A cold plate and electronic equipment

Abstract

This application provides a cold plate and an electronic device. The cold plate includes a main body, comprising: a first plate and a second plate, the first and second plates being spaced apart along a first direction, intersecting the surfaces of the first and second plates, and a housing being disposed between the first and second plates; a toothed structure disposed along a second direction on the side wall of the first plate facing the housing; a flow guiding structure disposed along a third direction within the housing, with flow splitting structures at both ends of the flow guiding structure, the flow guiding structure and the flow splitting structure facing and abutting against the toothed structure; and an inlet and an outlet disposed on the second plate, the inlet communicating with the flow guiding structure and the outlet communicating with the flow splitting structure; wherein the first, second, and third directions intersect each other. This application reduces the flow resistance of the cooling medium, improves the surface temperature uniformity of the cold plate, and improves the heat dissipation efficiency of the cold plate.

Description

Technical Field

[0001] This application relates to the field of fluid heat dissipation technology, and more particularly to a cold plate and electronic equipment. Background Technology

[0002] With the rapid development of electronic devices, the integration of circuit boards is becoming increasingly higher, which leads to a continuous increase in the power density of electronic devices on the circuit boards, resulting in a sharp rise in the temperature of the circuit boards.

[0003] In the prior art, circuit boards typically use parallel microchannel cold plates or jet impact cold plates for heat dissipation. However, parallel microchannel cold plates have long flow channels, which can easily form sluggish flow areas in the flow channels, resulting in uneven temperature distribution on the surface of the cold plate. Jet impact cold plates have excessively high flow velocities in the jet impact area, which increases the flow resistance of the cooling medium and can only dissipate heat in local areas, failing to cover the entire area, resulting in uneven temperature distribution on the surface of the cold plate. Summary of the Invention

[0004] This application provides a cold plate and an electronic device, which reduces the flow resistance of the cooling medium in the cold plate, improves the uniformity of the surface temperature of the cold plate, and improves the heat dissipation efficiency of the cold plate.

[0005] To achieve the above-mentioned objectives, this application adopts the following approach:

[0006] In a first aspect, this application provides a cold plate, including a cold plate body, the cold plate body comprising:

[0007] A first plate and a second plate are arranged at intervals along a first direction, the first direction intersecting the surfaces of the first plate and the second plate, and a shell is provided between the first plate and the second plate.

[0008] A shovel-tooth structure, wherein the shovel-tooth structure is disposed along a second direction on the side wall of the first plate facing the housing;

[0009] A flow guiding structure is disposed within the housing along a third direction. A flow splitting structure is provided at both ends of the flow guiding structure. The flow guiding structure and the flow splitting structure face the shovel tooth structure and abut against the shovel tooth structure.

[0010] The second plate is provided with an inlet and an outlet, the inlet being connected to the flow guiding structure and the outlet being connected to the flow splitting structure;

[0011] The first direction, the second direction, and the third direction intersect each other.

[0012] In one possible implementation, the shovel tooth structure includes a first shovel tooth area and a second shovel tooth area;

[0013] The first shovel tooth area is located in the middle of the first plate, and at least one second shovel tooth area is provided on each side of the first shovel tooth area. The first shovel tooth area abuts against the flow guiding structure and the flow splitting structure respectively.

[0014] In one possible implementation, the first shovel tooth region includes a plurality of first shovel teeth, the plurality of first shovel teeth being spaced apart along the third direction and extending along the second direction;

[0015] The second shovel tooth area includes a plurality of second shovel teeth, and a plurality of third shovel teeth are respectively provided on both sides of the plurality of second shovel teeth. The plurality of second shovel teeth and the plurality of third shovel teeth are arranged at intervals along the third third direction, and the plurality of second shovel teeth and the plurality of third shovel teeth extend along the second direction.

[0016] Wherein, the length of the first shovel tooth extending along the second direction is greater than the lengths of the second shovel tooth and the third shovel tooth extending along the second direction;

[0017] The dimension of the second shovel tooth extending along the first direction is greater than the dimensions of the first shovel tooth and the third shovel tooth extending along the first direction.

[0018] In one possible implementation, the flow guiding structure is disposed at the middle position within the housing, the flow guiding structure includes a plurality of flow guiding plates, the plurality of flow guiding plates are spaced apart along the second direction, and the plurality of flow guiding plates extend along the third direction;

[0019] The guide plate is provided with a guide groove, and the opening of the guide groove faces the first plate.

[0020] In one possible implementation, the flow splitting structure includes a flow splitting block that extends along the second direction, and the flow splitting block is provided with a plurality of inlet chambers and a plurality of outlet chambers;

[0021] The plurality of inlet chambers and the plurality of outlet chambers are arranged at intervals along the second direction, and the plurality of inlet chambers and the plurality of outlet chambers are alternately arranged, with the openings of the inlet chambers and the outlet chambers facing the first plate.

[0022] The inlet cavity is connected to the guide channel, and the outlet cavity is connected to the outlet.

[0023] In one possible implementation, the plurality of outflow chambers includes a plurality of first outflow chambers and a plurality of second outflow chambers;

[0024] The plurality of first outflow chambers are disposed in the middle position of the flow divider block, and the plurality of second outflow chambers are respectively disposed on both sides of the plurality of first outflow chambers;

[0025] The first outlet cavity includes a first step and a second step, the first step being located on the side of the second step closer to the guide plate, and the first step and the second step having different dimensions extending along the first direction;

[0026] The second outlet cavity includes a third step, a fourth step, and a fifth step. The third step is located on the side of the fourth step closer to the guide plate, and the fifth step is located on the side of the fourth step away from the guide plate. The dimensions of the third step, the fourth step, and the fifth step extending along the first direction are different.

[0027] Wherein, the dimension of the fifth step extending along the first direction is smaller than the dimension of the second step extending along the first direction.

[0028] In one possible implementation, a merging structure is further included, the merging structure being disposed at the end of the branching structure away from the guiding structure, the merging structure comprising:

[0029] At least two manifolds are arranged at intervals along the second direction and extend along the second direction, and the at least two manifolds abut against the second shovel tooth area;

[0030] A baffle is disposed on the side wall of the manifold away from the flow guiding structure, and the baffle abuts against the first plate and the second plate respectively;

[0031] A flow channel is formed between two adjacent flow manifolds, and the flow channel is connected to the flow guiding structure and the flow manifold respectively;

[0032] The baffle and the side beam of the shell form a receiving cavity, which is connected to the manifold and the outlet respectively.

[0033] In one possible implementation, the manifold is provided with an inlet chamber and an outlet chamber, the inlet chamber extending along the second direction and the outlet chamber extending along the third direction;

[0034] The inlet chamber is connected to the confluence channel, the outlet chamber is connected to the receiving cavity, and the outlet chamber and the outlet are offset from each other;

[0035] The dimension of the outflow chamber extending along the first direction is greater than the dimension of the inflow chamber extending along the first direction;

[0036] The second shovel tooth area is located in the confluence channel and the inlet chamber.

[0037] In one possible implementation, the cold plate body further includes a first region, a second region, and a third region;

[0038] The first region is located at the middle position of the cold plate body extending along the third direction, the second region is located at both ends of the first region, and the third region is located at the end of the second region away from the first region;

[0039] The first region includes the flow guiding structure and a first shovel tooth area corresponding to the flow guiding structure; the second region includes the flow splitting structure and a first shovel tooth area corresponding to the flow splitting structure; and the third region includes the flow converging structure and the second shovel tooth area.

[0040] The inlet is connected to the first region, the inlet is located at the center of the first region, and the outlet is located at the center of the receiving cavity.

[0041] Secondly, this application provides an electronic device, including a circuit board and a cold plate as described in any of the above claims, wherein the cold plate is used to dissipate heat from the circuit board.

[0042] The cold plate and electronic device of this application comprises a first plate, a housing, and a second plate arranged sequentially along a first direction. A toothed structure arranged along a second direction is provided on the side wall of the first plate facing the housing. A flow-guiding structure arranged along a third direction is provided inside the housing, with flow-diverting structures at both ends of the flow-guiding structure. An inlet and an outlet are provided on the second plate, with the inlet connected to the flow-guiding structure and the outlet connected to the flow-diverting structure. The flow-guiding structure distributes and guides the cooling medium entering the cold plate, causing the cooling medium to undergo a primary jet impact on the toothed structure, reducing the flow resistance of the cooling medium and improving the heat dissipation efficiency of the cold plate. The flow-guiding and flow-diverting structures further distribute and guide the cooling medium, causing a secondary jet impact on the toothed structure, improving the uniformity of the surface temperature distribution of the cold plate and further enhancing its heat dissipation efficiency. Furthermore, the cooling medium enters the shell through the inlet and is concentrated into a single jet at full flow through the toothed structure. After jetting, the cooling medium is divided into two along the guide structure and enters the split structures at both ends for secondary jetting onto the toothed structure, achieving a two-stage jetting effect of "concentration followed by dispersion". At the same time, the cooling medium flows dispersedly along the guide structure, reducing the flow resistance of the cooling medium. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0044] Figure 1 This is a schematic diagram of the structure of the cold plate in one embodiment of this application;

[0045] Figure 2 This is a top view of the cold plate in one embodiment of this application;

[0046] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0047] Figure 4 for Figure 2 Cross-sectional view along the BB direction;

[0048] Figure 5 This is a schematic diagram of the structure of the first plate in one embodiment of this application;

[0049] Figure 6 This is a schematic diagram of the structure of the first shovel tooth in one embodiment of this application;

[0050] Figure 7 This is a schematic diagram of the structure of the second and third shovel teeth in one embodiment of this application;

[0051] Figure 8 This is a schematic diagram of the structure of the second plate in one embodiment of this application;

[0052] Figure 9 This is a schematic diagram of the shell structure in one embodiment of this application;

[0053] Figure 10 This is a top view of the housing in one embodiment of this application;

[0054] Figure 11 for Figure 10 A cross-sectional view along the CC direction;

[0055] Figure 12 for Figure 10 A cross-sectional view along the DD direction;

[0056] Figure 13 for Figure 10 Cross-sectional view along the EE direction;

[0057] Figure 14 for Figure 10 A cross-sectional view along the FF direction;

[0058] Figure 15 for Figure 10 Cross-sectional view along the GG direction;

[0059] Figure 16 for Figure 3 A cross-sectional view along the HH direction;

[0060] Figure 17 This is a schematic diagram of the flow of the cooling medium from the guide structure to the split structure in one embodiment of this application;

[0061] Figure 18 This is a schematic diagram of the flow of cooling medium from the diversion structure to the confluence structure in one embodiment of this application.

[0062] Explanation of reference numerals in the attached figures:

[0063] 100. Cold plate body; 101. First plate; 102. Second plate; 1021. Inlet; 1022. Outlet; 103. Shell; 104. First region; 105. Second region; 106. Third region; 200. Shovel tooth structure; 201. First shovel tooth area; 202. Second shovel tooth area; 203. First shovel tooth; 204. Second shovel tooth; 205. Third shovel tooth; 300. Flow guiding structure; 301. Flow guide plate; 302. Flow guide groove; 400. Flow splitting structure; 401. Flow splitting block; 402. Inlet cavity; 403. Outlet cavity; 4031. First outlet cavity; 4032. Second outlet cavity; 4033. First step; 4034. Second step; 4035. Third step; 4036. Fourth step; 4037. Fifth step; 500. Flow combining structure; 501. Flow combining hood; 502. Flow combining groove; 503. Inlet chamber; 504. Outlet chamber; 505. Baffle; 506. Receiving cavity. Detailed Implementation

[0064] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0065] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0066] This application provides a cold plate, see [link]. Figure 1 and Figure 3 The cold plate includes a cold plate body 100, which includes a first plate 101, a second plate 102, a shell 103, a toothed structure 200, a flow guiding structure 300, and a flow splitting structure 400. The first plate 101 and the second plate 102 are arranged at intervals along a first direction F1, and the first direction F1 intersects with the plate surfaces of the first plate 101 and the second plate 102. The shell 103 is disposed between the first plate 101 and the second plate 102. The toothed structure 200 is disposed along a second direction F2 on the first plate 101 facing the shell 103. On the side wall of 03, the flow guiding structure 300 is set inside the housing 103 along the third direction F3. The flow guiding structure 300 is provided with a flow splitting structure 400 at both ends. The flow guiding structure 300 and the flow splitting structure 400 face the shovel tooth structure 200 and abut against the shovel tooth structure 200. The second plate 102 is provided with an inlet 1021 and an outlet 1022. The inlet 1021 is connected to the flow guiding structure 300, and the outlet 1022 is connected to the flow splitting structure 400. The first direction F1, the second direction F2 and the third direction F3 intersect each other.

[0067] In this embodiment, the cooling medium in the external circulation loop enters the housing 103 through the inlet 1021. The guide structure 300 constrains and rectifies the cooling medium, forming a jet perpendicular to the first plate 101. This allows the cooling jet to directly impact the high heat flux density region of the toothed structure 200 with full flow concentration. The cooling medium exchanges heat with the toothed structure 200, carrying away the heat from the toothed structure 200. After impact, the cooling medium enters the guide structure 300 and is divided into two. It is symmetrically guided into the two side flow-dividing structures 400 through the guide structure 300, forming a secondary jet within the flow-dividing structures 400. This jet impacts the toothed structure 200 again. The cooling medium in the flow-dividing structures 400 diffuses laterally under the action of the toothed structure 200. The flow-dividing structures 400 then transport the cooling medium after the secondary impact to the outlet 1022 for discharge.

[0068] By staggering the flow guiding structure 300, the flow splitting structure 400, and the toothed structure 200, the cooling medium impacts the toothed structure 200 multiple times during its flow, reducing the long-distance flow of the cooling medium, lowering the flow resistance of the cooling medium, reducing the thermal resistance of the toothed structure 200, and improving the heat dissipation efficiency of the cold plate. This achieves both low thermal resistance and low flow resistance for the main body of the cold plate when the flow rate of the cooling medium is constant.

[0069] In one possible implementation, the first plate 101 is used to provide one-sided restraint for the fluid space inside the housing 103. It should be noted that the first plate 101 is in contact with the heating device, and the heat from the heating device is transferred to the fluid space inside the housing 103 through the toothed structure 200.

[0070] In one possible implementation, the first plate 101 can be a flat plate, a micro-arched or locally thickened structure. The first plate 101 can form a closed cavity with the shell 103 by brazing, diffusion welding, friction stir welding, laser welding, riveting, screwing, gluing or snap-fit ​​sealing structure.

[0071] In one possible implementation, the second plate 102 is disposed opposite to the first plate 101, and the second plate 102 is used to provide another side limit for the fluid space inside the housing 103. It should be noted that the first plate 101, the second plate 102 and the housing 103 together define the outer peripheral boundary of the internal flow channel and constrain the fluid pressure inside the flow channel.

[0072] In one possible implementation, the second plate 102 can be a flat plate, a partially recessed plate, or a reinforced plate structure.

[0073] In one possible implementation, the housing 103 is used to support the flow guiding structure 300 and the flow splitting structure 400 to introduce, impact, distribute, and discharge the cooling medium within the cold plate body. It should be noted that the housing 103 can be a frame type, a cavity type, or a multi-layer clamping structure.

[0074] In one possible implementation, the shovel tooth structure 200 is used to receive the impact of the cooling medium introduced by the flow guiding structure 300 and the flow splitting structure 400, so as to increase the contact area between the cooling medium and the first plate 101. It should be noted that the shovel tooth structure 200 can be a plate-shaped tooth, a comb-shaped tooth, a wedge-shaped tooth, or an array of teeth. The shovel tooth structure 200 can be integrally formed with the first plate 101, or it can be an independent metal tooth and welded to the first plate 101.

[0075] In one possible implementation, the flow guiding structure 300 is used to receive the cooling medium entering through the inlet 1021 and guide the cooling medium to the toothed structure 200, with the flow guiding structure 300 and the toothed structure 200 forming a cooperating staggered flow path.

[0076] In one possible implementation, the flow guiding structure 300 can be a flow guiding plate, flow guiding rib, flow guiding groove, flow straightening rib or local contraction channel. The flow guiding structure 300 can be integrally formed with the housing 103, or it can be fixed in the housing 103 by welding, gluing or clamping.

[0077] In one possible implementation, the flow-dividing structure 400 is used to distribute and guide the cooling medium to the outlet 1022 after the cooling medium performs impact heat exchange on the shovel tooth structure 200. It should be noted that the flow-dividing structure 400 can be a left-right symmetrical flow-dividing groove, flow-dividing cavity, bypass channel, or multi-branch guide arm.

[0078] In one possible implementation, see Figure 2 and Figure 8 The inlet 1021 is used to guide the external circulating cooling medium into the flow guiding structure 300 inside the cold plate, and the outlet 1022 is used to discharge the cooling medium collected by the flow splitting structure 400 from the cold plate and return it to the external circulation loop. It should be noted that the inlet 1021 and the outlet 1022 can be threaded interfaces, flange interfaces, quick-connect interfaces, or welded interfaces, or they can be standard pipe fittings or irregular channel openings.

[0079] In one possible implementation, the first direction F1, the second direction F2, and the third direction F3 are all perpendicular to each other. In this way, the shovel tooth structure 200 and the flow guiding structure 300 are orthogonally arranged, realizing secondary jet heat exchange of the cooling medium on the shovel tooth structure 200, thereby improving the heat dissipation efficiency of the cold plate.

[0080] In some embodiments, the cold plate body may be made of copper, aluminum, copper alloy, aluminum alloy or stainless steel, or it may be made of composite thermally conductive material. The second plate 102 and the shell 103 and its internal structure may be integrally formed, or the first plate 101, the second plate 102 and the shell 103 may be assembled by integral brazing.

[0081] In some embodiments, see Figure 4 and Figure 5 The shovel tooth structure 200 includes a first shovel tooth area 201 and a second shovel tooth area 202. The first shovel tooth area 201 is located at the middle position on the first plate 101. At least one second shovel tooth area 202 is provided on both sides of the first shovel tooth area 201. The first shovel tooth area 201 abuts against the flow guiding structure 300 and the flow splitting structure 400 respectively.

[0082] In one possible implementation, the first shovel tooth region 201 and the second shovel tooth region 202 form a differentiated tooth array of the shovel tooth structure 200. The first shovel tooth region 201 is located in the middle of the first plate 101. The first shovel tooth region 201 is a concentrated heat exchange region, and the second shovel tooth region 202 is a transition heat exchange region.

[0083] In one possible implementation, the tooth density of the first tooth region 201 and the tooth density of the second tooth region 202 may be the same or different, and the tooth size of the first tooth region 201 and the tooth size of the second tooth region 202 may be the same or different.

[0084] In this embodiment, the cooling medium enters the housing 103 through the inlet 1021 and, guided by the flow guiding structure 300, forms a jet along the first direction F1 to impact the first shovel tooth area 201, causing the cooling medium to exchange heat with the first shovel tooth area 201 through convection. After impact, the cooling medium flows into the flow guiding structure 300 and is divided into two parts, and is symmetrically introduced into the two side flow splitting structures 400 through the flow guiding structure 300. The cooling medium in the flow splitting structure 400 diffuses laterally in the first shovel tooth area 201 and impacts the first shovel tooth area 201 again. The flow splitting structure 400 transports the cooling medium after the second impact to the outlet 1022 for discharge.

[0085] It should be noted that the first toothed area 201 is a high heat flux density area. The cooling medium entering the shell 103 through the inlet 1021 directly impacts the center of the first toothed area 201, and the cooling medium exchanges heat with the center of the first toothed area 201. The flow distribution structure 400 redistributes the laterally diffused cooling medium, and the cooling medium in the flow distribution structure 400 impacts the edge of the first toothed area 201, so that the cooling medium is evenly distributed at the edge of the first toothed area 201, thereby improving the uniformity of the surface temperature distribution of the cold plate.

[0086] In some embodiments, see Figure 5 , Figure 6 and Figure 7 The first shovel tooth area 201 includes a plurality of first shovel teeth 203, which are spaced apart along a third direction F3 and extend along a second direction F2. The second shovel tooth area 202 includes a plurality of second shovel teeth 204, and a plurality of third shovel teeth 205 are respectively provided on both sides of the plurality of second shovel teeth 204. The plurality of second shovel teeth 204 and the plurality of third shovel teeth 205 are spaced apart along a third direction F3 and extend along a second direction F2. The length of the first shovel teeth 203 extending along the second direction F2 is greater than the length of the second shovel teeth 204 and the third shovel teeth 205 extending along the second direction F2. The dimension of the second shovel teeth 204 extending along the first direction F1 is greater than the dimension of the first shovel teeth 203 and the third shovel teeth 205 extending along the first direction F1.

[0087] In one possible implementation, the first shovel tooth 203, the second shovel tooth 204, and the third shovel tooth 205 can all be fin units that are in direct contact with the cooling medium. The first shovel tooth 203, the second shovel tooth 204, and the third shovel tooth 205 can all be rectangular teeth, trapezoidal teeth, dome teeth, pointed ridge teeth, or arc-shaped teeth. It should be noted that the first shovel tooth 203, the second shovel tooth 204, and the third shovel tooth 205 can be integrally formed with the first plate 101 by milling, stamping, extrusion forming, brazing lamination, or additive manufacturing.

[0088] Furthermore, the length of the first shovel tooth 203 is greater than the length of the second shovel tooth 204 and the third shovel tooth 205. The first shovel tooth 203 is located in the middle region of the first plate 101, so that the first shovel tooth 203 is in full contact with the cooling medium, extending the heat exchange path and improving the heat exchange efficiency of the central region.

[0089] In this embodiment, the cooling medium entering the housing 103 is guided by the flow guiding structure 300 to form a concentrated first jet impacting multiple first shovel teeth 203 in the first shovel tooth area 201 along the first direction F1. When the cooling medium passes between the multiple first shovel teeth 203, it will continuously scour the first shovel teeth 203, thereby exchanging heat in the concentrated heat exchange area of ​​the first plate 101. After impact, the cooling medium flows into the flow guiding structure 300 and is divided into two, and is symmetrically introduced into the two-way diversion structures 400 through the flow guiding structure 300.

[0090] In some embodiments, see Figure 9 , Figure 10 , Figure 14 and Figure 17 The flow guiding structure 300 is located in the middle position inside the housing 103. The flow guiding structure 300 includes multiple flow guiding plates 301. The multiple flow guiding plates 301 are arranged at intervals along the second direction F2 and extend along the third direction F3. The flow guiding plates 301 are provided with flow guiding grooves 302. The openings of the flow guiding grooves 302 face the first plate 101.

[0091] In one possible implementation, see Figure 4 and Figure 14 The guide plate 301 can be a U-shaped guide plate with a U-shaped cross section. The opening of the U-shaped guide plate 301 faces the first plate 101. The spacing between two adjacent guide plates 301 can be the same as the spacing between the inner walls on both sides of the guide channel 302.

[0092] In one possible implementation, a plurality of guide vanes 301 are arranged orthogonally to a plurality of first shovel teeth 203.

[0093] In this embodiment, after the cooling medium enters the housing 103 through the inlet 1021, it is separated and rectified by the gap between two adjacent guide plates 301, and then impacts the first shovel teeth 203 with a concentrated jet of full flow. After impact, the cooling medium flows along the second direction F2 in the gap between two adjacent first shovel teeth 203 and enters the guide groove 302 of the guide plate 301. The cooling medium in the guide groove 302 is divided into two along the third direction F3 and flows into the flow splitting structures 400 at both ends respectively. Under the action of multiple guide plates 301, the cooling medium uniformly covers the first shovel tooth area 201 and the corresponding heated area, and a short-path loop is formed between the first shovel teeth 203 and the guide groove 302, thereby reducing the flow resistance of the cooling medium, improving the cooling uniformity of the cooling medium, and improving the uniformity of the temperature distribution on the surface of the cold plate.

[0094] In some embodiments, see Figure 9 , Figure 11 , Figure 15 and Figure 17 The diversion structure 400 includes a diversion block 401, which extends along the second direction F2. The diversion block 401 is provided with a plurality of inlet chambers 402 and a plurality of outlet chambers 403. The plurality of inlet chambers 402 and the plurality of outlet chambers 403 are arranged at intervals along the second direction F2 and are alternately arranged. The openings of the inlet chambers 402 and the outlet chambers 403 face the first plate 101. The inlet chambers 402 are connected to the guide groove 302 and the outlet chambers 403 are connected to the outlet 1022.

[0095] It is understandable that both the inlet cavity 402 and the outlet cavity 403 are open on the side facing the first plate 101, and both the inlet cavity 402 and the outlet cavity 403 are connected to the gap between the two adjacent first shovel teeth 203.

[0096] In one possible implementation, the flow guide plate 301 and the flow divider block 401 can be fixed to the inside of the housing 103 by welding, brazing, press fitting, screwing or integral processing, and the inlet cavity 402 and the outlet cavity 403 both extend along the first direction F1 and the third direction F3.

[0097] In one possible implementation, the diverter block 401 abuts against the first plate 101 and the second plate 102 respectively, and the diverter block 401 is used to isolate the first shovel tooth area 201 and the second shovel tooth area 202. In this way, interference between the shovel teeth of the first shovel tooth area 201 and the second shovel tooth area 202 can be avoided, and leakage of the cooling medium can be prevented.

[0098] In this embodiment, after the cooling medium in the guide groove 302 flows into the inlet cavity 402, the cooling medium flows in the inlet cavity 402 along the first direction F1, so that the cooling medium forms a secondary jet in the inlet cavity 402, which impacts the first shovel teeth 203 again. The cooling medium diffuses in the gap between two adjacent first shovel teeth 203, enters the outlet cavity 403, flows out of the diversion structure 400 through the outlet cavity 403, and is discharged through the outlet 1022.

[0099] It should be noted that after the cooling medium enters the housing 103, it forms a concentrated jet of full flow perpendicular to the first plate 101, impacting the high heat flux density area corresponding to the first shovel tooth area 201. After the impact, the cooling medium spreads laterally in the gap between two adjacent first shovel teeth 203 and enters the guide groove 302 of the guide plate 301. The cooling medium in the guide groove 302 is divided into two along the third direction F3 and flows symmetrically into the inlet chambers 402 at both ends. The cooling medium flows along the first direction F1 in the inlet chamber 402 to form a secondary jet, which impacts the first shovel tooth area 201 again. The cooling medium forms an S-shaped flow path of primary jet impact - lateral diffusion - secondary jet impact, so that the cooling medium is in full contact with the first shovel tooth area 201, improving the heat dissipation efficiency of the cold plate.

[0100] In some embodiments, see Figure 12 , Figure 13 , Figure 15 and Figure 17 The multiple outflow chambers 403 include multiple first outflow chambers 4031 and multiple second outflow chambers 4032. The multiple first outflow chambers 4031 are located in the middle of the flow divider block 401, and multiple second outflow chambers 4032 are respectively arranged on both sides of the multiple first outflow chambers 4031. The first outflow chamber 4031 includes a first step 4033 and a second step 4034. The first step 4033 is located on the side of the second step 4034 near the guide plate 301. The first step 4033 and the second step 4034 have different dimensions extending along the first direction F1. The second outlet cavity 4032 includes a third step 4035, a fourth step 4036, and a fifth step 4037. The third step 4035 is located on the side of the fourth step 4036 closer to the guide plate 301, and the fifth step 4037 is located on the side of the fourth step 4036 away from the guide plate 301. The dimensions of the third step 4035, the fourth step 4036, and the fifth step 4037 extending along the first direction F1 are different. Among them, the dimension of the fifth step 4037 extending along the first direction F1 is smaller than the dimension of the second step 4034 extending along the first direction F1.

[0101] In one possible implementation, the dimension of the second step 4034 extending along the first direction F1 is greater than the dimension of the first step 4033 extending along the first direction F1, the dimension of the fourth step 4036 extending along the first direction F1 is greater than the dimensions of the third step 4035 and the fifth step 4037 extending along the first direction F1, and the dimension of the fifth step 4037 extending along the first direction F1 is greater than the dimension of the third step 4035 extending along the first direction F1. Thus, the first outlet cavity 4031 has a partially expanded flow channel shape, and the second outlet cavity 4032 has a flow channel state that first partially expands and then partially contracts.

[0102] In one possible implementation, the outflow cavity 403 can be formed by casting, precision milling, wire cutting, additive manufacturing or compression molding, and the cross-section of the outflow cavity 403 can be rectangular, trapezoidal, rounded rectangle or composite stepped.

[0103] In one possible implementation, the cross-sectional area of ​​the first outflow cavity 4031 is larger than the cross-sectional area of ​​the second outflow cavity 4032, and the outlet size of the first outflow cavity 4031 is larger than the outlet size of the second outflow cavity 4032.

[0104] It should be noted that the first outlet cavity 4031 and the second outlet cavity 4032 have different flow guiding efficiencies. The first outlet cavity 4031 is located in the middle of the flow divider block 401, while the second outlet cavity 4032 is located on both sides of the flow divider block 401. Thus, the outlet cavities 403 at different positions in the flow divider block 401 are arranged differently to exert different guiding effects on the cooling medium.

[0105] In this embodiment, after the cooling medium impacts the first shovel teeth 203 a second time, it diffuses in the gap between two adjacent first shovel teeth 203 and enters the first outlet cavity 4031 and the second outlet cavity 4032. The first outlet cavity 4031 is located in the middle of the flow divider block 401, and the second outlet cavity 4032 is located on both sides of the flow divider block 401. The cross-sectional area of ​​the first outlet cavity 4031 is larger than that of the second outlet cavity 4032, which increases the amount of cooling medium in the first outlet cavity 4031, improves the heat dissipation efficiency in the middle area of ​​the flow divider block 401, and reduces the amount of cooling medium in the second outlet cavity 4032, avoiding waste of cooling medium. This achieves adaptive adjustment of the cooling medium flow rate of the first outlet cavity 4031 and the second outlet cavity 4032, enabling on-demand liquid supply to the first outlet cavity 4031 and the second outlet cavity 4032. The outlet size of the second outlet cavity 4032 is smaller than that of the first outlet cavity 4031, which increases the outlet flow velocity of the cooling medium in the second outlet cavity 4032, thereby compensating for the insufficient pressure difference caused by the path difference in the edge area, so that the output of cooling medium in the middle area and the edge area remains balanced, and the uniformity of the surface temperature distribution of the cold plate is improved.

[0106] In some embodiments, see Figure 9, Figure 10 and Figure 18 It also includes a confluence structure 500, which is disposed at the end of the diversion structure 400 away from the guide structure 300. The confluence structure 500 includes at least two confluence hoods 501 and a baffle 505. The at least two confluence hoods 501 are arranged at intervals along the second direction F2 and extend along the second direction F2. The at least two confluence hoods 501 abut against the second shovel tooth area 202. The baffle 505 is disposed on the side wall of the confluence hood 501 away from the guide structure 300. The baffle 505 abuts against the first plate 101 and the second plate 102 respectively. A confluence groove 502 is formed between two adjacent confluence hoods 501. The confluence groove 502 is connected to the guide structure 300 and the confluence hood 501 respectively. The baffle 505 and the side beam of the housing 103 form a receiving cavity 506. The receiving cavity 506 is connected to the confluence hood 501 and the outlet 1022 respectively.

[0107] In one possible implementation, the manifold 501 is connected to the diverter block 401. The manifold 501 has a trapezoidal cross-section and covers the second toothed area 202, which abuts against the inner wall of the manifold 501. It should be noted that the closed end of the manifold 501 is connected to the diverter block 401, and the open end of the manifold 501 faces the outlet 1022.

[0108] In one possible implementation, the dimension of the manifold 501 in the first direction F1 is smaller than the dimension of the outlet of the outlet cavity 403 in the first direction F1. This facilitates the introduction of the cooling medium output from the outlet cavity 403 into the manifold 501 through the manifold 502.

[0109] In one possible implementation, the cross-section of the manifold 502 can be V-shaped. This facilitates the collection of the cooling medium output from the outlet cavity 403.

[0110] Understandably, the baffle 505 is used to close the manifold 502, prevent the manifold 502 from connecting with the outlet 1022, and prevent the cooling medium from flowing directly from the manifold 502 to the outlet 1022.

[0111] In this embodiment, after the cooling medium is diverted within the diversion structure 400, it is output through the outlet cavity 403. The baffle 505 separates the outlet 1022 from the outlet cavity 403. The cooling medium output from the outlet cavity 403 is collected through the confluence channel 502 and evenly distributed to the confluence shrouds 501 on both sides for further confluence. The confluenced cooling medium flows through the second toothed area 202, where it exchanges heat, further improving the heat dissipation efficiency of the cold plate. After flowing through the second toothed area 202, the cooling medium flows into the receiving cavity 506 for diffusion and buffering, and then is discharged through the outlet 1022. The receiving cavity 506 buffers the flowing cooling medium, reducing jet impact and backflow disturbance, and reducing pressure surges and flow fluctuations at the outlet 1022. This ensures that the cooling medium maintains a relatively stable flow state before leaving the housing 103, improving the stability of the cold plate's heat dissipation.

[0112] In some embodiments, see Figure 9 , Figure 10 , Figure 11 and Figure 18 The manifold 501 is provided with an inlet chamber 503 and an outlet chamber 504. The inlet chamber 503 extends along the second direction F2, and the outlet chamber 504 extends along the third direction F3. The inlet chamber 503 is connected to the manifold 502, and the outlet chamber 504 is connected to the receiving cavity 506. The outlet chamber 504 and the outlet 1022 are misaligned. The dimension of the outlet chamber 504 extending along the first direction F1 is greater than the dimension of the inlet chamber 503 extending along the first direction F1. The second shovel tooth area 202 is provided in the manifold 502 and the inlet chamber 503.

[0113] In one possible implementation, the cross-sectional shape of the inlet chamber 503 matches the cross-sectional shape of the second shovel tooth region 202.

[0114] In one example, two second shovel areas 202 are respectively provided on both sides of the first shovel area 201. The two second shovel areas 202 are arranged at intervals along the second direction F2. The number of manifolds 501 is three. The three manifolds 501 are arranged at intervals along the second direction F2. A manifold groove 502 is formed between two adjacent manifolds 501. A second shovel area 202 is provided in each manifold groove 502.

[0115] In this embodiment, the cooling medium output from the outlet chamber 403 flows into the second shovel tooth area 202 through the confluence channel 502, and then flows into the inlet chamber 503 along the gap between the second shovel tooth 204 and the third shovel tooth 205. It then flows sequentially into the outlet chamber 504 and the receiving cavity 506, and finally exits through the outlet port 1022. The cooling medium output from the outlet chamber 403 is collected within the confluence shroud 501, preventing disordered diffusion or backflow within the housing 103, reducing the flow resistance of the cooling medium, and improving the stability of the cold plate heat dissipation. The outlet chamber 504 and the outlet port 1022 are offset to prevent the cooling medium from directly impacting the outlet port 1022. The size of the outlet chamber 504 is larger than that of the inlet chamber 503, allowing the cooling medium in the inlet chamber 503 to converge and rectify within a larger space, reducing flow resistance and minimizing velocity fluctuations near the outlet. The second shovel tooth 204 and the third shovel tooth 205 are arranged in a high-low tooth form. The height difference between the second shovel tooth 204 and the third shovel tooth 205 balances the flow rate of the cooling medium output from the first outlet cavity 4031 and the second outlet cavity 4032, so that the cooling medium is output evenly and the uniformity of the surface temperature distribution of the cold plate is improved.

[0116] In some embodiments, see Figure 16 The cold plate body 100 also includes a first region 104, a second region 105, and a third region 106. The first region 104 is located at the middle position of the cold plate body 100 extending in a third direction. The second region 105 is located at both ends of the first region 104. The third region 106 is located at the end of the second region 105 away from the first region 104. The first region 104 includes a flow guiding structure 300 and a first toothed area 201 corresponding to the flow guiding structure 300. The second region 105 includes a flow splitting structure 400 and a first toothed area 201 corresponding to the flow splitting structure 400. The third region 106 includes a flow converging structure 500 and a second toothed area 202. The inlet 1021 is connected to the first region 104 and is located at the center of the first region 104. The outlet 1022 is located at the center of the receiving cavity 506.

[0117] It should be noted that the first region 104, the second region 105, and the third region 106 are sequentially arranged within the cold plate body 100 along a third direction. There is one first region 104, which is located in the middle of the cold plate body 100. There are two second regions 105 and two third regions 106. The two second regions 105 are symmetrically arranged at both ends of the first region 104 with respect to the center line of the cold plate body 100, and the two third regions 106 are symmetrically arranged at the ends of the second regions 105 away from the first region 104 with respect to the center line of the cold plate body 100. The first region 104 is a high heat flux density region, while the second region 105 and the third region 106 are low heat flux density regions.

[0118] The first region 104 includes the flow guiding structure 300 and the portion of the first shovel tooth region 201 that abuts against the flow guiding structure 300; the second region 105 includes the flow splitting structure 400 and the portion of the first shovel tooth region 201 that abuts against the flow splitting structure 400; and the third region 106 includes the converging structure 500 and the second shovel tooth region 202.

[0119] There is one inlet 1021, which is located at the center of the first region 104. There are two outlets 1022, each located at the center of the receiving cavity 506.

[0120] In this embodiment, the cold plate body 100 is divided into a first region 104, a second region 105, and a third region 106. The first region 104 is located in the middle of the cold plate body 100, the two second regions 105 are located at opposite ends of the first region 104, and the third region 106 is located between the second region 105 and the receiving cavity 506. The inlet 1021 is located at the center of the first region 104, and the outlet 1022 is located at the center of the receiving cavity 506. The cooling medium in the external circulation loop enters the housing 103 through the inlet 1021, and the cooling medium is concentrated at full flow at the center of the first region 104. In the first region of the jet, the cooling medium impacts the high heat flux density region. After the impact, the cooling medium enters the guide structure 300 and is evenly divided into two parts within the guide structure 300. These parts then flow symmetrically into the second regions 105 on both sides through the guide structure 300. A second jet is then performed in the split structure 400. The cooling medium after the second jet flows dispersedly into the third region 106 and is then collected in the converging structure 500 before flowing into the receiving cavity 506 to buffer the flowing cooling medium. The buffered cooling medium is then evenly discharged through two outlets 1022, thereby reducing the flow resistance of the cooling medium and the thermal resistance of the cold plate body 100.

[0121] In addition, this application also provides an electronic device, including a circuit board and a cold plate as described in any of the above embodiments, the cold plate being used to dissipate heat from the circuit board.

[0122] In this embodiment, high-power chips, power devices, or computing modules can be arranged on the circuit board of the electronic device. The cold plate is set in correspondence with the circuit board, so that the first shovel tooth area 201 is set in correspondence with the high heat flux density area on the circuit board, so as to transfer the heat generated by the circuit board during operation to the cooling medium and improve the heat dissipation efficiency of the local hot spot of the circuit board.

[0123] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0124] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A cold-rolled steel plate, characterized in that, Includes a cold plate body (100), the cold plate body (100) comprising: A first plate (101) and a second plate (102) are arranged at intervals along a first direction, the first direction intersecting the plate surfaces of the first plate (101) and the second plate (102), and a shell (103) is provided between the first plate (101) and the second plate (102). A shovel tooth structure (200) is disposed along a second direction on the side wall of the first plate (101) facing the housing (103); A flow guiding structure (300) is disposed in the housing (103) along a third direction. A flow splitting structure (400) is provided at both ends of the flow guiding structure (300). The flow guiding structure (300) and the flow splitting structure (400) face the shovel tooth structure (200) and abut against the shovel tooth structure (200). The second plate (102) is provided with an inlet (1021) and an outlet (1022). The inlet (1021) is connected to the flow guiding structure (300), and the outlet (1022) is connected to the flow splitting structure (400). The first direction, the second direction, and the third direction intersect each other.

2. The cold-rolled plate according to claim 1, characterized in that, The shovel tooth structure (200) includes a first shovel tooth area (201) and a second shovel tooth area (202); The first shovel tooth area (201) is located in the middle of the first plate (101), and at least one second shovel tooth area (202) is provided on both sides of the first shovel tooth area (201). The first shovel tooth area (201) abuts against the flow guiding structure (300) and the flow splitting structure (400) respectively.

3. The cold-rolled plate according to claim 2, characterized in that, The first shovel tooth area (201) includes a plurality of first shovel teeth (203), the plurality of first shovel teeth (203) are arranged at intervals along the third direction, and the plurality of first shovel teeth (203) extend along the second direction; The second shovel tooth area (202) includes a plurality of second shovel teeth (204), and a plurality of third shovel teeth (205) are respectively provided on both sides of the plurality of second shovel teeth (204). The plurality of second shovel teeth (204) and the plurality of third shovel teeth (205) are arranged at intervals along the third direction, and the plurality of second shovel teeth (204) and the plurality of third shovel teeth (205) extend along the second direction. Wherein, the length of the first shovel tooth (203) extending along the second direction is greater than the length of the second shovel tooth (204) and the third shovel tooth (205) extending along the second direction; The dimension of the second shovel tooth (204) extending along the first direction is greater than the dimension of the first shovel tooth (203) and the third shovel tooth (205) extending along the first direction.

4. The cold-rolled plate according to claim 2, characterized in that, The flow guiding structure (300) is disposed in the middle position inside the housing (103). The flow guiding structure (300) includes a plurality of flow guiding plates (301), which are arranged at intervals along the second direction and extend along the third direction. The guide plate (301) is provided with a guide groove (302), and the opening of the guide groove (302) faces the first plate (101).

5. The cold-rolled plate according to claim 4, characterized in that, The flow splitting structure (400) includes a flow splitting block (401), which extends along the second direction and is provided with a plurality of inlet chambers (402) and a plurality of outlet chambers (403). The plurality of inlet chambers (402) and the plurality of outlet chambers (403) are arranged at intervals along the second direction, and the plurality of inlet chambers (402) and the plurality of outlet chambers (403) are alternately arranged, with the openings of the inlet chambers (402) and the outlet chambers (403) facing the first plate (101). The inlet cavity (402) is connected to the guide groove (302), and the outlet cavity (403) is connected to the outlet (1022).

6. The cold-rolled plate according to claim 5, characterized in that, The plurality of outflow chambers (403) include a plurality of first outflow chambers (4031) and a plurality of second outflow chambers (4032). The plurality of first outflow chambers (4031) are located in the middle of the flow divider block (401), and the plurality of second outflow chambers (4032) are respectively provided on both sides of the plurality of first outflow chambers (4031). The first outlet cavity (4031) includes a first step (4033) and a second step (4034). The first step (4033) is located on the side of the second step (4034) near the guide plate (301). The dimensions of the first step (4033) and the second step (4034) extending along the first direction are different. The second outlet cavity (4032) includes a third step (4035), a fourth step (4036), and a fifth step (4037). The third step (4035) is located on the side of the fourth step (4036) closer to the guide plate (301), and the fifth step (4037) is located on the side of the fourth step (4036) away from the guide plate (301). The dimensions of the third step (4035), the fourth step (4036), and the fifth step (4037) extending along the first direction are different. The fifth step (4037) extending along the first direction has a smaller dimension than the second step (4034) extending along the first direction.

7. The cold-rolled plate according to claim 5, characterized in that, It also includes a merging structure (500), which is disposed at the end of the branching structure (400) away from the guiding structure (300), and the merging structure (500) includes: At least two manifolds (501) are arranged at intervals along the second direction and extend along the second direction, and the at least two manifolds (501) abut against the second shovel tooth area (202); A baffle (505) is disposed on the side wall of the manifold (501) away from the flow guiding structure (300), and the baffle (505) abuts against the first plate (101) and the second plate (102) respectively; A flow channel (502) is formed between two adjacent flow manifolds (501), and the flow channel (502) is connected to the flow guiding structure (300) and the flow manifold (501) respectively; The baffle (505) and the side beam of the housing (103) form a receiving cavity (506), which is connected to the manifold (501) and the outlet (1022) respectively.

8. The cold-rolled plate according to claim 7, characterized in that, The manifold (501) is provided with an inlet chamber (503) and an outlet chamber (504), the inlet chamber (503) extends along the second direction, and the outlet chamber (504) extends along the third direction; The inlet chamber (503) is connected to the confluence channel (502), the outlet chamber (504) is connected to the receiving cavity (506), and the outlet chamber (504) and the outlet (1022) are offset from each other; The dimension of the outflow chamber (504) extending along the first direction is greater than the dimension of the inflow chamber (503) extending along the first direction; The second shovel tooth area (202) is located within the confluence channel (502) and the inlet chamber (503).

9. The cold plate according to claim 8, characterized in that, The cold plate body (100) also includes a first region (104), a second region (105) and a third region (106). The first region (104) is located at the middle position of the cold plate body (100) extending along the third direction, the second region (105) is located at both ends of the first region (104), and the third region (106) is located at the end of the second region (105) away from the first region (104). The first region (104) includes the flow guiding structure (300) and the first shovel tooth area (201) corresponding to the flow guiding structure (300); the second region (105) includes the flow splitting structure (400) and the first shovel tooth area (201) corresponding to the flow splitting structure (400); and the third region (106) includes the flow converging structure (500) and the second shovel tooth area (202). The inlet (1021) is connected to the first region (104), the inlet (1021) is located at the center of the first region (104), and the outlet (1022) is located at the center of the receiving cavity (506).

10. An electronic device, characterized in that, It includes a circuit board and a cold plate as described in any one of claims 1 to 9, the cold plate being used to dissipate heat from the circuit board.

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