Automobile liquid-cooler

Abstract

An automobile liquid-cooler includes a stamped top cover, a forged bottom cover, a coolant inlet and outlet structure, and one or more metal fins. The stamped top cover and the forged bottom cover are joined via a first brazing layer there-between. A flow channel structure for a coolant to flow is formed between the stamped top cover and the forged bottom cover. The metal fins are located within the flow channel structure. The metal fins and the stamped top cover are joined via a second brazing layer there-between. The metal fins and the forged bottom cover are joined via a third brazing layer there-between. The heat dissipation contact surface of the forged bottom cover is in direct contact with the coolant, and is in thermal contact with the metal fins through the third brazing layer. The heat source contact surface of the forged bottom cover is configured to contact with the heat source, and the heat source contact surface is formed to have at least three bumps or grooves with different areas.

Description

[Technical Field]

[0001] This invention relates to a liquid-cooled radiator, and more specifically to a liquid-cooled radiator for automobiles. [Previous Technology]

[0002] Currently, the requirements for liquid cooling radiators for automotive IGBTs (Insulated Transistors) or ADAS (Advanced Driver Assistance Systems) are becoming increasingly stringent, especially in terms of manufacturing costs and heat dissipation performance, which makes current liquid cooling radiators unable to meet the demands. [Summary of the Invention]

[0003] The technical problem to be solved by the present invention is to provide a liquid-cooled radiator for automobiles that addresses the shortcomings of the prior art.

[0004] An embodiment of the present invention provides a vehicle liquid-cooled radiator, comprising: a stamped upper cover; a forged lower cover; a coolant inlet / outlet structure; and one or more metal fins; wherein, a flow channel structure for coolant flow is formed between the recessed area of ​​the stamped upper cover and the forged lower cover, the flow channel structure is connected to the coolant inlet / outlet structure, and the periphery of the recessed area of ​​the stamped upper cover is joined to the forged lower cover by a first brazing layer; one or more metal fins are located within the flow channel structure, one One or more of the metal fins are joined to the stamped upper cover by a second brazing layer, and one or more of the metal fins are joined to the forged lower cover by a third brazing layer; the upper and lower surfaces of the forged lower cover are respectively a heat dissipation contact surface and a heat source contact surface, the heat dissipation contact surface is in direct contact with the coolant and forms thermal contact with one or more of the metal fins through the third brazing layer, the heat source contact surface is used to form contact with the heat source, and the heat source contact surface has at least three bosses or grooves of different areas.

[0005] In a preferred embodiment, the coolant inlet / outlet structure is provided on at least one of the stamped upper cover and the forged lower cover.

[0006] In a preferred embodiment, the coolant inlet / outlet structure is a coolant inlet head and a coolant outlet head.

[0007] In a preferred embodiment, the coolant inlet and outlet structure is a coolant inlet and a coolant outlet.

[0008] In a preferred embodiment, the stamped top cover is a stamped aluminum or aluminum alloy part formed by stamping.

[0009] In a preferred embodiment, the forged lower cover is a forged aluminum or aluminum alloy part formed by forging.

[0010] In a preferred embodiment, the grooved area of ​​the stamped upper cover forms the upper, left and right parts of the flow channel structure, and the flat plate area of ​​the forged lower cover forms the lower half of the flow channel structure.

[0011] In a preferred embodiment, the draft angle of each boss is greater than or equal to 2 degrees.

[0012] In a preferred embodiment, at least 70% of the thickness of the first brazing layer, the second brazing layer, and the third brazing layer is less than 0.3 mm.

[0013] In a preferred embodiment, the surface of the boss or the groove used to contact the heat source is formed with a film layer, the film layer containing one or more of the following elements: copper, nickel, and silver.

[0014] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention.

Implementation Method

[0015] The following describes the embodiments disclosed in this invention through specific examples. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. In addition, the accompanying drawings of this invention are only simple illustrations and are not depictions based on actual dimensions, as stated in advance. Furthermore, the same or similar parts in the drawings are labeled with the same reference numerals. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention. In addition, the term "or" used herein should be interpreted as possibly including any combination of any one or more of the associated listed items, depending on the actual situation.

[0016] [First Embodiment]

[0017] Please refer to Figures 1 and 2, which are one embodiment of the present invention. The automotive liquid-cooled radiator provided in this embodiment is a closed-type automotive liquid-cooled radiator. The automotive liquid-cooled radiator provided in this embodiment of the present invention includes a stamped upper cover 1, a forged lower cover 2, a coolant inlet / outlet structure 3, and one or more metal fins 4.

[0018] The stamped upper cover 1 and the forged lower cover 2 can be made of aluminum or aluminum alloy. Furthermore, the stamped upper cover 1 is a stamped aluminum or aluminum alloy part formed by stamping, and the forged lower cover 2 is a forged aluminum or aluminum alloy part formed by forging. Thus, because the stamped upper cover 1 is a stamped aluminum or aluminum alloy part formed by stamping, and the forged lower cover 2 is a forged aluminum or aluminum alloy part formed by forging, the automotive liquid cooling radiator of this embodiment has better heat dissipation performance, lower cost, and lighter weight compared to current die-cast automotive liquid cooling radiators. It also avoids the problems of gas trapping leading to porosity or shrinkage cavities caused by uneven shrinkage in die-cast metal parts, which can affect overall quality and heat dissipation performance.

[0019] Furthermore, a flow channel structure 6 for coolant 7 is formed between the recessed area 11 of the stamped upper cover 1 and the flat area 21 of the forged lower cover 2. The flow channel structure 6 is connected to the coolant inlet / outlet structure 3, allowing coolant 7 to flow into the sealed flow channel structure 6 from the coolant inlet / outlet structure 3 and out of the flow channel structure 6 from the coolant inlet / outlet structure 3. Additionally, the surrounding area 12 of the recessed area 11 of the stamped upper cover 1 and the surrounding area 22 of the flat area 21 of the forged lower cover 2 are joined by a first brazing layer 5. Thus, by joining the stamped upper cover 1 and the forged lower cover 2 by the first brazing layer 5, the leak-proof capability of the automotive liquid-cooled radiator is improved.

[0020] In this embodiment, the lower half of the flow channel structure 6 is formed by a forged lower cover 2, and the upper, left, and right parts of the flow channel structure 6 are formed by a stamped upper cover 1. Alternatively, the grooved area 11 of the stamped upper cover 1 forms the upper, left, and right parts of the flow channel structure 6, and the flat area 21 of the forged lower cover 2 forms the lower half of the flow channel structure 6. Furthermore, in this embodiment, the coolant inlet / outlet structure 3 consists of a coolant inlet connector 31 and a coolant outlet connector 32, which are respectively spaced apart from the stamped upper cover 1 and can be brazed together. More specifically, the coolant inlet connector 31 is bonded to the stamped upper cover 1 with a first brazed bonding layer 311, and the coolant outlet connector 32 is bonded to the stamped upper cover 1 with a second brazed bonding layer 321.

[0021] Furthermore, the metal fins 4 are located within the flow channel structure 6. The metal fins 4 are bonded to the stamped upper cover 1 via a second brazing layer 8, and the metal fins 4 are bonded to the forged lower cover 2 via a third brazing layer 9. This strengthens the bond strength between the metal fins 4 and the stamped upper cover 1 and the forged lower cover 2, and improves heat dissipation capacity through the metal fins 4. Additionally, at least 70% of the thickness of the first brazing layer 5, the second brazing layer 8, and the third brazing layer 9 is less than 0.3 mm, which improves heat conduction efficiency and avoids stress concentration.

[0022] Furthermore, the upper and lower surfaces of the forged lower cover 2 are respectively a heat dissipation contact surface 201 and a heat source contact surface 202. The heat dissipation contact surface 201 of the forged lower cover 2 is in direct contact with the coolant 7 and forms thermal contact with the metal fins 4 through the third brazing layer 9. The heat source contact surface 202 of the forged lower cover 2 is used to form contact with the heat source. Furthermore, the heat source contact surface 202 of the forged lower cover 2 is non-planar, and it has at least three bosses 2021 or grooves 2022 with different areas. The shape and position of these bosses 2021 or grooves 2022 can correspond to the heat source (such as multiple power chips) on the circuit board of the automotive electronic component module, so that the heat source on the circuit board of the automotive electronic component module can contact these bosses 2021 or grooves 2022 to conduct the high heat during operation to the heat dissipation contact surface 201 of the forged lower cover 2, and the high heat is dissipated through the contact surface 201 of the forged lower cover 2 with the metal fins 4 and the coolant 7 that continuously flows through the flow channel structure 6. In addition, the multiple bosses 2021 or grooves 2022 in this embodiment are integrally formed with the forged lower cover 2 by forging, so as to withstand high temperature and higher stress. As shown in FIG2, the draft angle θ of the bosses 2021 is greater than or equal to 2 degrees.

[0023] [Second Embodiment]

[0024] Please refer to Figure 3, which is the second embodiment of the present invention. This embodiment is largely the same as the first embodiment, and the differences are explained below.

[0025] In this embodiment, the coolant inlet and outlet structure 3 consists of a coolant inlet port 33 and a coolant outlet port 34, which are respectively spaced apart on the stamped upper cover 1.

[0026] [Third Embodiment]

[0027] Please refer to Figure 4, which is the third embodiment of the present invention. This embodiment is largely the same as the first embodiment, and the differences are explained below.

[0028] In this embodiment, the coolant inlet / outlet structure 3 consists of a coolant inlet head 31 and a coolant outlet head 32, which are respectively spaced apart on the forged lower cover 2. Further, the coolant inlet head 31 is joined to the forged lower cover 2 by a first brazed bonding layer 311, and the coolant outlet head 32 is joined to the forged lower cover 2 by a second brazed bonding layer 321.

[0029] [Fourth Embodiment]

[0030] Please refer to Figure 5, which is the fourth embodiment of the present invention. This embodiment is largely the same as the first embodiment, and the differences are explained below.

[0031] In this embodiment, the coolant inlet and outlet structure 3 consists of a coolant inlet 33 and a coolant outlet 34, which are respectively spaced apart on the forged lower cover 2.

[0032] [Fifth Embodiment]

[0033] Please refer to Figure 6, which is the sixth embodiment of the present invention. This embodiment is largely the same as the first embodiment, and the differences are explained below.

[0034] In this embodiment, a film layer 2023 is formed on the surface of the protrusion 2021 or groove 2022 of the forged lower cover 2 that is used to contact the heat source, and the film layer 2023 may contain one or more of the following elements: copper, nickel, silver, so as to form a high thermal conductivity film layer that can fill the tiny gaps on the surface, thereby improving the heat conduction efficiency.

[0035] In summary, the automotive liquid-cooled radiator provided by the present invention includes a stamped upper cover, a forged lower cover, a coolant inlet / outlet structure, and one or more metal fins. A flow channel structure for coolant flow is formed between the recessed area of ​​the stamped upper cover and the forged lower cover. The flow channel structure and the coolant inlet / outlet structure are interconnected. The periphery of the recessed area of ​​the stamped upper cover is joined to the forged lower cover by a first brazing layer. The metal fins are located within the flow channel structure. The metal fins are joined to the stamped upper cover by a second brazing layer. The metal fins are joined to the forged lower cover by a third brazing layer. The upper and lower surfaces of the forged lower cover are respectively a heat dissipation contact surface and a heat source contact surface. The heat dissipation contact surface is in direct contact with the coolant and forms thermal contact with the metal fins through the third brazing layer. The heat source contact surface is used to contact a heat source, and the heat source contact surface has at least three bosses or grooves of different areas. Thus, by using a stamped upper cover made of stamped aluminum or aluminum alloy and a forged lower cover made of forged aluminum or aluminum alloy, the automotive liquid-cooled radiator of the present invention exhibits excellent heat dissipation performance, low cost, and light weight, and avoids the problems of air holes or shrinkage cavities affecting overall quality and heat dissipation performance. Furthermore, the stamped upper cover and forged lower cover are joined by a first brazing layer, which improves the leak-proof capability of the automotive liquid-cooled radiator of the present invention. Moreover, by using a second brazing layer to join the metal fins to the stamped upper cover and a third brazing layer to join the metal fins to the forged lower cover, the bonding strength between the metal fins and the stamped upper cover and the forged lower cover is strengthened, and the heat dissipation performance is improved through the metal fins. Finally, the heat source contact surface of the forged lower cover is formed with at least three bosses or grooves of different areas, so that the shape and position of these bosses or grooves can correspond to the heat source on the circuit board of the automotive electronic component module. This allows the heat source on the circuit board of the automotive electronic component module to contact these bosses or grooves and conduct the high heat during operation to the heat dissipation contact surface of the forged lower cover. The high heat is then dissipated through the contact surface of the forged lower cover with the metal fins and the coolant that continuously flows through the flow channel structure.

[0036] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention specification and drawings are included in the scope of the patent application of the present invention. [Simplified Explanation of the Diagram]

[0037] Figure 1 is a side view of the first embodiment of the automotive liquid-cooled radiator of the present invention.

[0038] Figure 2 is an enlarged schematic diagram of part II in Figure 1.

[0039] Figure 3 is a side view schematic diagram of the second embodiment of the automotive liquid-cooled radiator of the present invention.

[0040] Figure 4 is a side view of the third embodiment of the automotive liquid-cooled radiator of the present invention.

[0041] Figure 5 is a side view of the fourth embodiment of the automotive liquid-cooled radiator of the present invention.

[0042] Figure 6 is a side view of the fifth embodiment of the automotive liquid-cooled radiator of the present invention.

Claims

1. A liquid-cooled radiator for automobiles, comprising: Stamped top cover; forged bottom cover; coolant inlet / outlet structure; The device includes one or more metal fins; wherein a flow channel structure for coolant flow is formed between the recessed area of ​​the stamped upper cover and the forged lower cover, the flow channel structure is connected to the coolant inlet / outlet structure, and the periphery of the recessed area of ​​the stamped upper cover is bonded to the forged lower cover by a first brazing layer; one or more metal fins are located within the flow channel structure, one or more metal fins are bonded to the stamped upper cover by a second brazing layer, and one or more metal fins are bonded to the forged lower cover by a third brazing layer; the upper and lower surfaces of the forged lower cover are respectively a heat dissipation contact surface and a heat source contact surface, and the heat dissipation contact surface forms a direct connection with the coolant. The heat source contact surface is used to contact the heat source and form thermal contact with one or more of the metal fins through the third brazing layer. The heat source contact surface is formed with at least three bosses or grooves of different areas. The stamped upper cover is a stamped aluminum or aluminum alloy part, and the forged lower cover is a forged aluminum or aluminum alloy part. The at least three bosses or grooves of different areas formed on the heat source contact surface are integrally formed with the forged lower cover by forging. The at least three bosses or grooves of different areas formed on the heat source contact surface are used to contact the surface of the heat source to form a film layer. The film layer contains one or more of the following elements: copper, nickel, and silver.

2. The automotive liquid-cooled radiator as described in claim 1, wherein, The coolant inlet / outlet structure is provided in at least one of the stamped upper cover and the forged lower cover.

3. The automotive liquid-cooled radiator as described in claim 2, wherein, The coolant inlet and outlet structure consists of a coolant inlet head and a coolant outlet head.

4. The automotive liquid-cooled radiator as described in claim 2, wherein, The coolant inlet and outlet structure consists of a coolant inlet and a coolant outlet.

5. The automotive liquid-cooled radiator as described in claim 1, wherein, The recessed area of ​​the stamped upper cover forms the upper, left and right parts of the flow channel structure, and the flat area of ​​the forged lower cover forms the lower half of the flow channel structure.

6. The automotive liquid-cooled radiator as described in claim 1, wherein, The draft angle of each boss is greater than or equal to 2 degrees.

7. The automotive liquid-cooled radiator as described in claim 1, wherein, At least 70% of the thickness of the first brazing layer, the second brazing layer, and the third brazing layer is less than 0.3 mm.

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