Cooling cold plate

Abstract

The invention provides a heat dissipation cold plate. The heat dissipation cold plate comprises a base, a fin core body and a heat dissipation cover plate, a groove is formed in the base, a fin core body is arranged in the groove, and the heat dissipation cover plate is connected to the groove in a buckled mode. The top of the fin core body is connected with the heat dissipation cover plate, and the bottom of the fin core body is connected with the bottom of the groove; an inlet hole and an outlet hole which are communicated with the outside of the base are formed in the groove; the fin core body comprises a plurality of parallel fins, and the fins form a plurality of flow channels; the flow channel is divided into an inlet flow channel and a discharge flow channel; the number of the inlet flow channels is larger than one, and communicating structures are arranged between the inlet flow channels. The number of the discharge flow channels is larger than one, and communication structures are arranged between the discharge flow channels. The inlet flow channel is communicated with the discharge flow channel; the inlet flow channel is communicated with the inlet hole, and the outlet flow channel is communicated with the outlet hole. The device can be widely applied to the technical field of heat dissipation.

Description

Technical Field

[0001] The present invention relates to a cooling device, in particular to a device for cooling devices such as thyristors, field effect tubes, coating target substrates and the like. Background Art

[0002] Devices such as thyristors, field effect transistors, and coating target substrates need to be cooled in a timely manner during operation. The heat dissipation cold plate is the main equipment for the above heat dissipation. A cooling medium flow channel is provided inside the heat dissipation cold plate, and devices such as thyristors are placed on the plate surface of the heat dissipation cold plate. Through the continuous flow of the cooling medium in the cooling medium flow channel, the heat dissipation cold plate and devices such as thyristors exchange heat to achieve the purpose of heat dissipation.

[0003] The existing heat dissipation cold plate is a copper alloy plate with internal flow channels processed in the whole. Although the copper alloy plate has the advantage of high heat dissipation efficiency, its cost is relatively high. In addition, when processing the internal flow channel in the copper alloy plate, the internal channels are usually drilled from different directions of the copper alloy plate. After the internal channels in different directions intersect, other processed holes except the entrance and exit are blocked to form the internal flow channel. The internal channels in different directions form a non-smooth corner at the intersection. The flowing cooling medium will encounter greater resistance when passing through the non-smooth corner, thereby reducing the flow rate and even generating vibration, which adversely affects the cooling effect and production safety.

[0004] At the same time, since the machined internal flow channel cannot be effectively inspected, processing residues (such as metal chips, burrs, etc.) are easily accumulated inside, making the internal flow channel easily blocked after use, creating a safety hazard. Summary of the invention

[0005] In order to solve the aforementioned problems of high cost, reduced cooling effect and unsafety of the existing heat dissipation cold plate, the present invention provides a heat dissipation cold plate.

[0006] The technical solution of the present invention is as follows:

[0007] A heat dissipation cold plate comprises a base, a fin core and a heat dissipation cover plate; a groove is arranged on the base, the fin core is arranged in the groove, and the heat dissipation cover plate is buckled on the groove; the top of the fin core is connected to the heat dissipation cover plate, and the bottom of the fin core is connected to the bottom of the groove;

[0008] The groove is provided with an inlet hole and an outlet hole communicating with the outside of the base;

[0009] The fin core includes a plurality of fins arranged in parallel, and the fins form a plurality of flow channels; the flow channels are divided into inlet flow channels and outlet flow channels; the number of the inlet flow channels is greater than 1, and a connecting structure is provided between the inlet flow channels; the number of the outlet flow channels is greater than 1, and a connecting structure is provided between the outlet flow channels; the inlet flow channel is connected to the outlet flow channel; the inlet flow channel is connected to the inlet hole, and the outlet flow channel is connected to the outlet hole.

[0010] Optionally, a dividing rib is provided in the groove; the dividing rib divides the groove into two connected spaces: an inlet space and an outlet space; the inlet flow channel is provided in the inlet space; and the outlet flow channel is provided in the outlet space.

[0011] Optionally, the separation rib comprises a strip-shaped protruding structure extending from a first edge of the groove to a second edge of the groove opposite to the first edge and protruding from the bottom of the groove.

[0012] Optionally, the inlet hole and the outlet hole are arranged at the first edge of the groove and are respectively arranged on both sides of the dividing rib.

[0013] Optionally, the heat dissipation cover plate is made of copper alloy; and the base is made of stainless steel.

[0014] Optionally, the entry hole and / or the exit hole includes a stepped hole; the stepped hole includes a first-step hole and a second-step hole arranged sequentially from the outside to the inside of the groove; the inner diameter of the first-step hole is larger than the inner diameter of the second-step hole; and a first-step hole internal thread is provided in the first-step hole.

[0015] Optionally, the heat dissipation cold plate is provided with a joint; the joint comprises a joint core tube and a joint locking nut; the joint locking nut is sleeved outside the joint core tube, and the joint locking nut is provided with a locking nut external thread matching the first-order hole internal thread;

[0016] The first end of the joint core tube extends into the entry hole or exit hole toward the inside of the groove; a sealing ring is provided on the outer wall of the joint core tube adjacent to the first end; an annular groove is provided on the outer wall of the joint core tube, and a retaining ring protruding from the outer wall of the joint core tube is provided in the annular groove.

[0017] Optionally, when the joint core tube is assembled into the entry hole or the exit hole, the sealing ring is arranged in the second step hole or the step hole closer to the groove; after the joint locking nut is assembled into the first step hole, the joint locking nut presses the retaining ring.

[0018] Optionally, the number of the sealing rings is greater than one.

[0019] Optionally, the retaining ring is in a non-closed C-shape.

[0020] Optionally, the fin core includes an I-shaped structural unit; a plurality of the I-shaped structural units are staggered to form the flow channel.

[0021] The technical effects of the present invention are as follows:

[0022] The heat dissipation cold plate of the present invention comprises a base, a fin core and a heat dissipation cover plate. An open groove is provided on the base, so that the corners in the groove can be processed into a smooth transition angle to avoid fluid deceleration and vibration caused. The fin core is made of a plurality of long sheet metal fins arranged side by side, and a channel for the flow of cooling medium is formed between the fins. The fin core is placed in the groove, and then the heat dissipation cover plate is buckled on the groove. The space formed by the heat dissipation cover plate and the groove is divided into an inlet flow channel and an outlet flow channel by the fin core for the circulation of cooling medium.

[0023] Since the only part that needs to dissipate heat is the heat dissipation cover, this part can be made of a material with a higher cost but good heat dissipation performance, such as copper alloy. Other parts, such as the base, can be made of a lower cost and higher strength material, such as stainless steel, thereby significantly reducing material costs. In addition, the processing of the grooves and the processing of the fin core can be carried out under the conditions of visible and spacious operating space, which makes it easier to improve the processing quality and inspect the processing results, and reduces safety risks.

[0024] In summary, the technical solution of the present invention achieves the purpose of the present invention.

[0025] The further effects of the above optional manner will be described below in conjunction with the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural exploded view of an embodiment of the heat dissipation cold plate of the present invention.

[0027] Figure 2 for Figure 1 A cross-sectional view of the illustrated embodiment.

[0028] Figure 3 for Figure 1 A top cross-sectional view of the illustrated embodiment.

[0029] Figure 4 for Figure 1 A schematic diagram of the connection between the base and the joint of the illustrated embodiment.

[0030] Figure 5 for Figure 1 A cross-sectional view of the illustrated embodiment of the connector after assembly to a base.

[0031] Figure 6It is a three-dimensional view of a second embodiment of a fin core.

[0032] The symbols in the figure are explained as follows:

[0033] 101, heat dissipation cover plate; 102, fin core; 103, base; 104, discharge space; 105, entry space; 106, entry hole; 107, separation rib; 108, exit hole;

[0034] 401, connector;

[0035] 501, joint core tube; 502, joint locking nut; 503, retaining ring; 504, sealing ring;

[0036] 601. The “J” shaped structural unit. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is described in detail below in conjunction with the embodiments shown in the accompanying drawings.

[0038] Figure 1 An embodiment of the heat dissipation cold plate of the present invention is shown. Figure 1 The main components of the heat dissipation cold plate are shown in an exploded view. The heat dissipation cold plate includes a base 103, a fin core 102 and a heat dissipation cover plate 101. The base 103 is a thick plate structure, and an open rectangular groove (the four corners of the rectangle are chamfered) is processed on the plate surface of the thick plate structure. Figure 2 and Figure 4 The fin core 102 is arranged in the groove, and the heat dissipation cover plate 101 is buckled on the open edge of the groove. Figure 2 As shown, the top of the fin core 102 is connected to the heat dissipation cover plate 101, and the bottom of the fin core 102 is connected to the bottom of the groove. In this embodiment, the fin core 102 and the heat dissipation cover plate 101 are connected together by welding, and the fin core 102 and the bottom of the groove are also connected together by welding. In other embodiments, the fin core and the heat dissipation cover plate and the bottom of the groove can be connected by other existing technical methods, which are not listed here.

[0039] like Figure 1 , Figure 2 and Figure 3As shown, the fin core 102 is made of a plurality of long strip-shaped fins. The long axis directions of the fins are parallel and connected in parallel to form the fin core 102. The top of the fin (i.e., the top of the fin core 102) has a top plane formed by bending. After the fin core 102 is assembled in place, the top plane of the fin is connected to the heat dissipation cover 101. The bottom of the fin (i.e., the bottom of the fin core 102) has a bottom plane formed by bending. After the fin core 102 is assembled in place, the bottom plane of the fin is connected to the bottom of the groove. The fins arranged in parallel form a plurality of flow channels in the fin core 102. Holes are provided on the fins so that the flow channels can be connected.

[0040] like Figure 1 As shown, an inlet hole 106 and an outlet hole 108 are provided on the side wall of the groove. On the side wall where the inlet hole 106 and the outlet hole 108 are provided. A raised dividing rib 107 is provided at the bottom of the groove. The dividing rib 107 extends from the side wall between the inlet hole 106 and the outlet hole 108 to the middle of the groove in the direction of the opposite side wall, thereby dividing the groove into two connected spaces: an entry space 105 connected to the inlet hole 106, and an outlet space 104 connected to the outlet hole 108. The flow channel of the part of the fin core 102 placed in the entry space 105 is the entry flow channel, and the flow channel of the part of the fin core 102 placed in the outlet space 104 is the outlet flow channel. The directions of the entry flow channel and the outlet flow channel are parallel to the length direction of the dividing rib 107. The number of the entry flow channels and the number of the outlet flow channels are both greater than 1. The opening at the first end of the inlet channel is connected to the inlet hole 106, and the opening at the second end of the inlet channel is connected to the connection point between the inlet space 105 and the outlet space 104; the opening at the first end of the outlet channel is connected to the outlet hole 108, and the opening at the second end of the outlet channel is connected to the connection point between the inlet space 105 and the outlet space 104.

[0041] Figure 1 In the embodiment shown, the heat dissipation cover plate 101 is made of copper alloy, and the base 103 is made of stainless steel. Figure 1 After the heat dissipation cover plate 101, the fin core 102 and the base 103 are assembled in place in the assembly method shown, a diffusion welding process can be used for pressing, so that the heat dissipation cover plate 101 is connected to the base 103, the heat dissipation cover plate 101 is connected to the fin core 102, and the fin core 102 is connected to the base 103. At this point, the internal flow channel of the heat dissipation cold plate has been prepared. In addition to the aforementioned diffusion welding method, other methods can also be used, such as arc welding, electron beam, laser, vacuum brazing, hot pressing, 3D printing, etc.

[0042] Figure 3 The arrows in the figure indicate the flow direction of the cooling medium. Figure 3As shown by the middle arrow, the cooling medium enters the inlet channel from the inlet hole 106, then enters the outlet channel, and finally is discharged through the outlet hole 108. Since the size of the groove can be set larger than that of the existing drilling process, the flow rate of the cooling medium of the heat dissipation cold plate of the present invention can be larger, the effective heat dissipation area of ​​the heat dissipation cover plate is larger, and the heat dissipation efficiency is higher. At the same time, the processing process of the heat dissipation cold plate can be carried out under visual conditions, the arc corners of the flow channel can be processed at low cost, and internal residues can be effectively eliminated to avoid blockage.

[0043] When the cooling medium flows into the flow channel or the discharge flow channel, the cooling medium can communicate between adjacent flow channels due to the holes provided on the fins. When the heat dissipation cover 101 is heated unevenly, the exchange of cooling medium between different flow channels can accelerate the heat exchange speed and avoid local overheating of the heat dissipation cover 101. In addition, the fin core 102 is respectively connected to the heat dissipation cover 101 and the base 103. When the heat dissipation cover 101 is deformed due to rapid temperature changes, the fin core 102 can suppress the degree of deformation and avoid failure of the heat dissipation cold plate. For example, when the heat dissipation cover 101 is Figure 2 When the heat dissipation cover plate 101 is arched in the middle and upward direction, the tensile force formed by the dense connection of the fin core 102 can effectively limit the arching degree of the heat dissipation cover plate 101; Figure 2 When the heat dissipation cover plate 101 is concave in the downward direction, the dense connection of the fin cores 102 forms a supporting force, which can also effectively suppress the deformation of the heat dissipation cover plate 101.

[0044] Since the main part that needs to undergo heat exchange is the heat dissipation cover plate 101, the heat dissipation cover plate 101 uses a copper alloy with a relatively high cost but good heat dissipation performance to meet the requirements of heat dissipation efficiency. At the same time, the base 103 does not need to consider the requirements of heat dissipation, so it can use stainless steel with a lower cost and higher strength. On the one hand, the material cost is greatly reduced, and on the other hand, the processing cost of machining grooves on the base 103 is low, and the precision of the grooves is also higher. The prior art uses a heat dissipation cold plate processed on the basis of a copper alloy plate. After machining, an internal and external plating process is required to protect the heat dissipation cold plate. The cost of this process is high, and the quality of the internal plating is difficult to guarantee. The technical solution of the present invention can avoid the plating process, save costs, and reduce environmental pollution.

[0045] like Figure 3 As shown, both the inlet hole 106 and the outlet hole 108 are the same stepped holes. The stepped hole is formed by connecting two holes with different apertures, and a step is formed at the connection of the two holes. Among them, the inner diameter of the first step hole close to the outside of the base 103 is larger than the inner diameter of the second step hole close to the groove. An internal thread is arranged in the first step hole.

[0046] like Figure 4As shown, the inlet hole 106 and the outlet hole 108 are externally connected with a connector 401. The connector 401 is a detachable connector, that is, the connector 401 can be connected to or detached from the inlet hole 106 and the outlet hole 108 as needed. Different from the existing connectors welded on the heat dissipation cold plate, the connector of the present invention avoids the problem of internal welding defects after welding. At the same time, the connector of the present invention can be detached when needed, such as when packaging and transporting, which can bring convenience and save packaging and logistics costs.

[0047] Figure 5 The state where the connector 401 is connected to the inlet hole 106 and the outlet hole 108 is shown in a cross-sectional view. Figure 5 As shown, the joint 401 includes a joint core tube 501 and a joint locking nut 502. The joint core tube 501 is a hollow tubular part, and the outer diameter of the joint core tube 501 matches the inner diameter of the aforementioned second-step hole. The left side of the joint core tube 501 is used to connect with the cooling medium pipeline, so a pagoda structure is provided on the side wall adjacent to the left end (first end) to facilitate the connection of the pipeline. Two sealing rings 504 are provided on the outer wall of the joint core tube 501 adjacent to the right end (second end). The sealing ring 504 forms a good seal between the joint core tube 501 and the inner wall of the second-step hole.

[0048] The joint locking nut 502 is a hollow nut. The external thread provided on the outer surface of the joint locking nut 502 matches the internal thread of the aforementioned first-step hole. The joint locking nut 502 is sleeved on the outside of the joint core tube 501. An annular groove is provided on the outer wall of the portion of the joint core tube 501 located at the first-step hole, and a retaining ring 503 protruding from the outer wall of the joint core tube 501 is provided in the annular groove. The joint locking nut 502 screwed into the first-step hole presses against the retaining ring 503, thereby preventing the joint core tube 501 from moving toward the joint core tube 501. Figure 5 The left side shown slides. In the present embodiment, the retaining ring 504 is a non-closed C-shaped retaining ring, which can be easily replaced.

[0049] Figure 6 Another embodiment of the fin core is shown. The fin core is composed of structural units with a cross-section of a "J" shape. One row of "J"-shaped structural units is staggered with an adjacent row of "J"-shaped structural units, and is co-located with another row of "J"-shaped structural units, resulting in a staggered arrangement. The above arrangement forms flow channels of the fin core, and the flow channels can be connected.

[0050] It is worth noting that the above description is only a preferred embodiment of the present invention, and does not limit the scope of patent protection of the present invention. The present invention can also be replaced by equivalent technologies. Therefore, any equivalent changes made by using the description and illustrations of the present invention, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A heat dissipation cold plate, characterized in that: It comprises a base, a fin core and a heat dissipation cover plate; a groove is arranged on the base, the fin core is arranged in the groove, and the heat dissipation cover plate is buckled on the groove; the top of the fin core is connected to the heat dissipation cover plate, and the bottom of the fin core is connected to the bottom of the groove; The groove is provided with an inlet hole and an outlet hole communicating with the outside of the base; The fin core includes a plurality of fins arranged in parallel, and the fins form a plurality of flow channels; the flow channels are divided into inlet flow channels and outlet flow channels; the number of the inlet flow channels is greater than 1, and a connecting structure is provided between the inlet flow channels; the number of the outlet flow channels is greater than 1, and a connecting structure is provided between the outlet flow channels; the inlet flow channel is connected to the outlet flow channel; the inlet flow channel is connected to the inlet hole, and the outlet flow channel is connected to the outlet hole.

2. A heat dissipation cold plate according to claim 1, characterized in that: A dividing rib is arranged in the groove; the dividing rib divides the groove into two communicating spaces: an inlet space and an outlet space; the inlet flow channel is arranged in the inlet space; and the outlet flow channel is arranged in the outlet space.

3. A heat dissipation cold plate according to claim 2, characterized in that: The separation rib includes a strip-shaped protruding structure extending from a first edge of the groove to a second edge of the groove opposite to the first edge and protruding from the bottom of the groove.

4. A heat dissipation cold plate according to claim 3, characterized in that: The inlet hole and the outlet hole are arranged at the first edge of the groove and are respectively arranged on both sides of the dividing rib.

5. The heat dissipation cold plate according to claim 1, characterized in that: The material of the heat dissipation cover plate includes copper alloy; the material of the base includes stainless steel.

6. The heat dissipation cold plate according to claim 1, characterized in that: The entry hole and / or the exit hole include a stepped hole; the stepped hole includes a first-step hole and a second-step hole arranged sequentially from the outside to the inside of the groove; the inner diameter of the first-step hole is larger than the inner diameter of the second-step hole; and a first-step hole internal thread is provided in the first-step hole.

7. A heat dissipation cold plate according to claim 6, characterized in that: A joint is provided; the joint comprises a joint core tube and a joint locking nut; the joint locking nut is sleeved outside the joint core tube, and the joint locking nut is provided with a locking nut external thread matching the first-stage hole internal thread; The first end of the joint core tube extends into the entry hole or exit hole toward the inside of the groove; a sealing ring is provided on the outer wall of the joint core tube adjacent to the first end; an annular groove is provided on the outer wall of the joint core tube, and a retaining ring protruding from the outer wall of the joint core tube is provided in the annular groove.

8. The heat dissipation cold plate according to claim 7, characterized in that: When the joint core tube is assembled to the inlet hole or the outlet hole, the sealing ring is arranged in the second step hole or the step hole closer to the groove; after the joint locking nut is assembled to the first step hole, the joint locking nut presses the retaining ring.

9. The heat dissipation cold plate according to claim 7, characterized in that: The retaining ring is in a non-closed C shape.

10. The heat dissipation cold plate according to claim 1, characterized in that: The fin core comprises an I-shaped structural unit; a plurality of the I-shaped structural units are staggered to form the flow channel.

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