Air-liquid composite cold plate

Abstract

The utility model discloses an air-liquid composite cold plate which is mainly formed by welding an upper groove substrate, a lower groove substrate, air cooling fins, liquid cooling fins and other components together through vacuum brazing, and an air cooling runner and a liquid cooling runner which are connected in parallel. A transformer rectifier is installed on the upper surface of the upper groove substrate, a liquid cooling flow channel is distributed below the upper groove substrate, an air cooling flow channel is distributed below the lower groove substrate, when the output power is low, air enters the air cooling flow channel through a fan, and when the output power is high, circulating cooling liquid provided by an airplane liquid cooling system enters the liquid cooling flow channel. And finally, installation and heat dissipation of functional modules such as a rectification module, a transformation assembly and a resistor component of the transformer rectifier are realized. According to the utility model, through a composite heat dissipation mode of air cooling and liquid cooling, two parts of flow channels work cooperatively, so that the heat dissipation efficiency is improved while compact and small components are ensured, heat can be taken away in time when the transformer rectifier works, and normal operation of a system is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, specifically relating to an air-cooled composite cold plate. Background Technology

[0002] A cold plate is a heat exchange component used to dissipate heat from electronic components mounted on its surface, meeting the needs of these components. Due to its high heat exchange efficiency and power, it is widely used in electronic heat dissipation, automotive, and aerospace fields. However, with the increasing power and heat flux density of integrated electronic devices, conventional cold plates can no longer meet heat dissipation requirements. To overcome the shortcomings of existing technology and optimize the cold plate structure, composite cold plates have emerged. Typically, the difference between composite and ordinary cold plates lies in their internal structure; composite cold plates often have more complex internal structures to achieve more diverse and efficient functions.

[0003] A transformer rectifier includes functional modules such as a rectifier module, a transformer assembly, and resistor components. During operation, it generates a large amount of heat. In order to achieve compact installation of each functional module and timely heat dissipation, it is necessary to design an air-liquid composite cooling plate. This not only reduces the size and weight of the heat dissipation components, but also utilizes both air cooling and liquid cooling methods to dissipate heat from the components, thereby increasing the heat dissipation power. Summary of the Invention

[0004] The present invention aims to provide an air-liquid composite cooling plate, which has an internal air-cooling channel and a liquid-cooling channel. It dissipates heat from the rectifier module and transformer assembly through a combination of air cooling and liquid cooling, so that the rectifier module and transformer assembly are controlled, safe, stable and reliable during operation.

[0005] The working principle of this air-liquid composite cooling plate is as follows: the rectifier module and the transformer assembly are respectively fixed on different areas of the upper slot substrate. Using the fan built into the transformer rectifier or a separate fan, when the output power of the transformer rectifier is low, air enters the air-cooling channel through the fan to dissipate heat from the transformer assembly and the rectifier module; when the output power is high, the circulating coolant provided by the aircraft liquid cooling system enters the liquid cooling channel to dissipate heat from the transformer assembly and the rectifier module.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An air-liquid composite cold plate, comprising:

[0008] The upper tank substrate has an upper end surface that is a device mounting surface, and a lower end surface that includes a machining flow channel and a fin mounting area. An inlet and an outlet are respectively opened on two opposite side walls of the upper tank substrate.

[0009] liquid cooling fins arranged on the lower end surface of the upper channel substrate, and the liquid cooling fins are brazed to the fin mounting area of the lower end surface of the upper channel substrate through the first brazing plate;

[0010] a lower channel substrate, the upper end surface of the lower channel substrate has a housing with two open ends, the inner cavity of the housing forms an air cooling flow channel, the openings at the two ends of the housing form an air inlet and an air outlet respectively, and the inner cavity of the housing further contains a plurality of parallel ribs extending from the air inlet to the air outlet, air cooling fins are mounted between adjacent ribs, and the upper end of the housing is brazed to the machined flow channel, the lower end of the liquid cooling fins, and the lower end surface of the upper channel substrate through the second brazing plate;

[0011] a flat substrate, the upper end of the flat substrate is brazed to the lower end of the air cooling fins and the lower end of the lower channel substrate through the third brazing plate.

[0012] Further, the air-liquid combined cooling plate further comprises an air outlet side plate which is detachably mounted at the air outlet of the housing of the lower channel substrate.

[0013] As an option:

[0014] The equipment mounting surface comprises two regions, one of which is a variable voltage component region near the air outlet, and the other is a rectifier module region near the air inlet;

[0015] The liquid cooling fins are arranged at positions corresponding to the variable voltage component region on the lower end surface of the upper channel substrate, or at positions corresponding to both the rectifier module region and the variable voltage component region on the lower end surface of the upper channel substrate;

[0016] The air cooling fins are arranged in the inner cavity of the housing of the lower channel substrate at positions corresponding to the rectifier module region and the variable voltage component region.

[0017] As an option, the height of the liquid inlet to the flat substrate is lower than the height of the liquid outlet to the flat substrate.

[0018] As an option:

[0019] The lower end surface of the upper channel substrate is further provided with a support column, and the support column penetrates through the liquid cooling fins and is connected to the second brazing plate at its end;

[0020] The inner wall of the housing of the lower channel substrate is provided with a support column, and the support column penetrates through the air cooling fins and is connected to the third brazing plate at its end.

[0021] As an option, a fan mounting position is provided on the upper end of the lower channel substrate on the air inlet side of the housing.

[0022] As an option, the air cooling fins are single-flow fins.

[0023] As an alternative, the liquid cooling fin is a four-flow baffle fin.

[0024] As an alternative, the upper groove base plate, the first brazing plate, the liquid cooling fin, the second brazing plate, the lower groove base plate, the air cooling fin, the third brazing plate and the flat base plate are welded together by vacuum brazing.

[0025] As an alternative, the air-liquid composite cooling plate further comprises:

[0026] A waterproof mounting hole is a threaded blind hole arranged on the air-liquid composite cooling plate, and the threaded blind hole is not communicated with the liquid cooling flow channel formed among the lower end surface of the upper groove base plate, the liquid cooling fin and the first brazing plate, and is not communicated with the air cooling flow channel of the upper cavity of the lower groove base plate.

[0027] A drainage structure is arranged on the drainage hole of the flat base plate and the third brazing plate.

[0028] Compared with the prior art, the air-liquid composite cooling plate of the utility model mainly comprises an upper groove base plate, a lower groove base plate, an air cooling fin and a liquid cooling fin and other components welded together by vacuum brazing, has two air cooling and liquid cooling flow channels, and the two channels are connected in parallel. The upper surface of the upper groove base plate is provided with a rectifier module and a voltage conversion assembly, and the lower surface is provided with a liquid cooling flow channel. The lower groove base plate is provided with an air cooling flow channel. When the output power of the voltage conversion rectifier is low, air enters the air cooling flow channel through the fan, that is, only air cooling is used. When the output power is high, the circulating cooling liquid provided by the aircraft liquid cooling system enters the liquid cooling flow channel, and at this time, air cooling and liquid cooling work simultaneously, and the main function is to realize efficient heat dissipation of the rectifier module, the voltage conversion assembly and the resistance components.

[0029] The air cooling and liquid cooling composite cooling mode is used, the two flow channels work together, the compactness and smallness of the components are ensured, the heat dissipation efficiency is improved, the heat of the voltage conversion rectifier can be removed in time when the voltage conversion rectifier works, and the normal operation of the system is ensured.

[0030] The utility model is divided according to the working condition of the voltage conversion rectifier, only the air cooling flow channel is used to cool the rectifier module (mainly rectifier diode) and the voltage conversion assembly when the output power is low, and the air cooling flow channel and the liquid cooling flow channel are switched to work simultaneously to cool the voltage conversion rectifier when the output power is high, so that the voltage conversion rectifier is quickly and efficiently cooled. At the same time, the support column between the upper groove base plate, the lower groove base plate and the fin increases the support and strength of the structure, so that the internal structure of the cooling plate is not easy to deform, and the overall strength of the air-liquid composite cooling plate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is an explosion view of the air-liquid composite cooling plate in the utility model;

[0032] Figure 2A top view of the air-liquid composite cooling plate;

[0033] Figure 3 A right view of the air-liquid composite cooling plate;

[0034] Figure 4 A left view of the air-liquid composite cooling plate;

[0035] Figure 5 A schematic view of the liquid cooling flow channel in the air-liquid composite cooling plate;

[0036] Figure 6 A schematic view of the air cooling flow channel in the air-liquid composite cooling plate;

[0037] Figure 7 An isometric view of the air-liquid composite cooling plate;

[0038] Figure 8 A lower end surface view of the upper grooved substrate;

[0039] In the figure: 1. upper grooved substrate, 2. lower grooved substrate, 3. liquid cooling fin, 4. air cooling fin, 5. air outlet side plate, 6. flat substrate, 7. first brazing plate, 8. second brazing plate, 9. third brazing plate. DETAILED DESCRIPTION

[0040] The utility model will be further described below in combination with the drawings and specific embodiments, but should not be understood as the scope of the subject matter described in the utility model is limited to the following embodiments, any modification, replacement and change made according to the ordinary technical knowledge and conventional means in the art without departing from the above technical ideas of the utility model, all are included in the scope of the utility model.

[0041] As shown in Figures 1-8 , the utility model designs an air-liquid composite cooling plate, which is mainly composed of an upper grooved substrate 1, a lower grooved substrate 2, a liquid cooling fin 3, an air cooling fin 4, an air outlet side plate 5, a flat substrate 6, a first brazing plate 7, a second brazing plate 8 and a third brazing plate 9 and other components.

[0042] The upper grooved substrate 1 and the lower grooved substrate 2 are vacuum brazed together through the second brazing plate 8 to form a core component, and the liquid cooling fin 3 and the air cooling fin 4 form internal liquid cooling flow channels and air cooling flow channels through the first brazing plate 7 and the third brazing plate 9 in the above-mentioned core component.

[0043] After the upper grooved substrate 1 and the liquid cooling fin 3 are fixed through the first brazing plate 7, the internal liquid cooling flow channels are connected with the liquid inlet and the liquid outlet, and the cooling liquid flows in the flow channels, exchanges heat with the surface of the transformer of the upper grooved substrate 1, carries away the heat of the transformer rectifier to ensure the normal work of the transformer rectifier. Figure 8As shown, the lower end surface of the upper groove base plate 1 includes a machining flow channel and a fin mounting area. The blank area in the figure corresponds to the fin mounting area, the area with a similar rounded rectangular line is the machining flow channel, and the circular area is the support column. The upper and lower sides correspond to the liquid inlet side and the liquid outlet side.

[0044] After the lower groove base plate 2 is fixed with the air-cooled fin 4, the air outlet side plate 5, and the flat base plate 6 through the third brazing plate 9, the internal air-cooled flow channel air inlet and air outlet are connected, the air inlet is connected with the fan, Figure 3 The three arc-shaped groove positions are shown in the figure. Each of the three groove positions is installed with a fan. The fan pumps air from the air inlet into the flow channel. The air flows in the flow channel and exchanges heat with the variable pressure assembly and the rectifier module on the surface of the upper groove base plate 1, thereby removing the heat of the rectifier module and the variable pressure assembly to ensure the normal operation of the variable pressure rectifier. Figure 1 As shown in Figure 6 , the lower end of the shell has a plurality of vertically arranged parallel and spaced rib strips on the lower end surface. The adjacent rib strips are the mounting positions of the air-cooled fin 4, and the circular positions are the support columns.

[0045] As shown in Figure 1 and Figure 5 , the two sides of the upper groove base plate 1 are provided with liquid inlets and outlets. The inlet and outlet positions adopt a low-in and high-out form, that is, the liquid inlet is closer to the flat base plate 6, and the liquid outlet is farther away from the flat base plate 6.

[0046] The air-cooled flow channel and the liquid-cooled flow channel have a waterproof function. Moisture cannot enter the internal cavity of the flow channel, and over-saturated humid air is not allowed to enter the internal flow channel from the cold plate. All the mounting screw holes on the cold plate are blind holes and cannot be connected with the internal flow channel. The flow channel has a drainage function and should not produce accumulated condensed water. The drainage is discharged through the drainage holes provided on the flat base plate 6 and the third brazing plate 9. The position of the drainage hole is near the fan side.

[0047] The lower surfaces of the upper groove base plate 1 and the lower groove base plate 2 are provided with a plurality of support columns to increase the stability of the cold plate structure and prevent the air-cooled fin 4, the liquid-cooled fin 3, and the rib from bending and deforming. The support column is an integral structure with the upper groove base plate 1 and the lower groove base plate 2.

[0048] The main materials of the upper groove base plate 1, the lower groove base plate 2, the liquid-cooled fin 3, the air-cooled fin 4, the air outlet side plate 5, and the flat base plate 6 are aluminum alloy. The exposed surface is black painted, and the installation surface should be smooth and flat.

[0049] As shown in Figure 1 and Figure 7As shown, after the upper substrate 1 and the liquid-cooled fins 3 are fixed by the second brazing plate 8, the internal liquid-cooled flow channel is connected to the liquid inlet and the liquid outlet. The coolant flows in the flow channel and exchanges heat with the transformer on the surface of the upper substrate 1, carrying away the heat of the transformer to ensure the normal operation of the transformer rectifier.

[0050] like Figures 5-6 As shown, Figure 5 The middle arrow indicates the flow path of the coolant in the liquid-cooled fin 3, from... Figure 5 After entering through the inlet on the right side, the liquid goes through four processes and undergoes three reversals before reaching the outlet on the left side. Figure 6 The central arrow indicates the path of air flow from the air-cooled fins 4, directly from the air inlet to the air outlet. The above description is merely one specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air-liquid composite cold plate, characterized by, It comprises: An upper channel base plate (1), the upper end face of which is a device mounting surface, the lower end face of which comprises a machined flow channel and a fin mounting area, and two opposite side walls of which are respectively provided with a liquid inlet and a liquid outlet; A liquid cooling fin (3) arranged on the lower end face of the upper channel base plate (1), and the liquid cooling fin (3) is brazed to the fin mounting area of the lower end face of the upper channel base plate (1) through a first brazing plate (7); A lower channel base plate (2), the upper end face of which has a shell with two open ends, the inner cavity of the shell forms an air cooling flow channel, the openings at both ends of the shell form an air inlet and an air outlet respectively, and the inner cavity of the shell further comprises a plurality of parallel ribs extending from the air inlet to the air outlet, air cooling fins (4) are arranged between adjacent ribs, and the upper end of the shell is brazed to the machined flow channel, the lower end of the liquid cooling fin (3) and the lower end face of the upper channel base plate (1) through a second brazing plate (8); A flat base plate (6), the upper end of which is brazed to the lower end of the air cooling fin (4), the rib and the lower end of the lower channel base plate (2) through a third brazing plate (9).

2. The air-liquid composite cold plate of claim 1, wherein: It also comprises an air outlet side plate (5) which can be detachably mounted at the air outlet of the shell of the lower channel base plate (2).

3. The air-liquid combined cooling plate of claim 1, wherein: The device mounting surface comprises two regions, one of which is a variable voltage component region near the air outlet, and the other is a rectifier module region near the air inlet; The liquid cooling fin (3) is arranged at the position corresponding to the variable voltage component region on the lower end face of the upper channel base plate (1), or at the positions corresponding to the rectifier module region and the variable voltage component region on the lower end face of the upper channel base plate (1) at the same time; The air cooling fin (4) is arranged at the position corresponding to the rectifier module region and the variable voltage component region in the inner cavity of the shell of the lower channel base plate (2).

4. The air-liquid composite cold plate of claim 1, wherein: The height of the liquid inlet to the flat base plate (6) is lower than the height of the liquid outlet to the flat base plate (6).

5. The air-liquid combined cooling plate of claim 1, wherein: The lower end face of the upper channel base plate (1) is further provided with a support column, the support column penetrates through the liquid cooling fin (3) and its end is connected to the second brazing plate (8); The inner wall of the shell of the lower channel base plate (2) is provided with a support column, the support column penetrates through the air cooling fin (4) and its end is connected to the third brazing plate (9).

6. The air-liquid composite cold plate of claim 1, wherein: A fan mounting position is provided on the upper end of the lower channel base plate (2) and on the air inlet side of the shell.

7. The air-liquid composite cold plate of claim 1, wherein: The air cooling fin (4) is a single-flow fin.

8. The air-liquid composite cold plate of claim 1, wherein: The liquid cooling fin (3) is a four-flow baffle fin.

9. The air-liquid composite cold plate of claim 1, wherein: The upper channel base plate (1), the first brazing plate (7), the liquid cooling fin (3), the second brazing plate (8), the lower channel base plate (2), the air cooling fin (4), the third brazing plate (9) and the flat base plate (6) are welded together by vacuum brazing.

10. The air-liquid composite cold plate of claim 1, wherein, It further comprises: The waterproof mounting hole is a threaded blind hole arranged on the air-liquid composite cold plate, and the threaded blind hole is not communicated with the liquid cooling flow channel formed among the lower end surface of the upper groove base plate (1), the liquid cooling fin (3) and the first brazing plate (7), and is also not communicated with the air cooling flow channel of the upper cavity of the lower groove base plate (2); the drainage structure is arranged on the drainage hole of the flat base plate (6) and the third brazing plate (9).

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