KR20060106508A - High performance heat sink and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a high performance heat sink for a vehicle air conditioner and a method for manufacturing the same, and an object of the present invention is to provide a high performance heat sink and a method for manufacturing the same, which are excellent in heat dissipation performance and can be miniaturized, reduced in weight, and improved in productivity.

The high performance heat sink of the present invention comprises: a heat sink 110 having a plurality of grooves 112 formed on one surface side by side at a predetermined interval; One or more U-turn bent portions 122 are inserted into the grooves, and a corrugated heat dissipation fin 120 is brazed. The groove 112 is preferably formed in a shape corresponding to the U-turn bend 122. In addition, a plurality of louvers 124 are formed in the heat dissipation fin 120 in a predetermined arrangement. The heat dissipation plate 110 and the corrugated heat dissipation fin 120 may be joined by inserting one U-turn bent portion 122 into the groove 112 and then brazing.

Heat sink, corrugated gate, heat sink fin, groove, brazing, heat sink

Description

High performance heat sink and manufacturing method thereof {HIGH PERFORMANCE HEAT SINK AND MANUFACTURING METHOD THEREOF}

1 is a perspective view showing an example of a conventional heat sink.

2 is a front view showing another example of a conventional heat sink.

3 is a perspective view showing a high performance heat sink according to the present invention.

4 is a partially enlarged view of a high performance heat sink according to the present invention.

5 is a partially enlarged view showing another example of a high performance heat sink according to the present invention.

6 is a flowchart illustrating a method of manufacturing a high performance heat sink according to the present invention.

7 is a flowchart illustrating another method of manufacturing a high performance heat sink according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: heat sink, 112: groove (Groove),

120: corrugate type heat radiation fin, 122: U-turn (U-Turn) bent portion,

124: Louver.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high performance heat sink for a vehicle air conditioner and a method for manufacturing the same. In particular, the present invention relates to a high performance heat sink capable of achieving excellent heat dissipation, miniaturization, light weight, and productivity. .

For example, in an air conditioning system of an electric vehicle, a compressor is driven by a drive motor separately provided in addition to the main power motor for driving the vehicle, and the main power motor or the drive motor is controlled by an inverter for shifting thereof. Since the main component of such an inverter consists of a semiconductor element, and heat is generated during the switching operation to affect the semiconductor element, the inverter may malfunction due to heat. Therefore, the inverter must be continuously cooled during operation of the motor, and heat dissipation means such as a heat sink is used for cooling the inverter.

1, an example of a conventional heat sink is shown. The heat sink 10 includes a heat sink 12 and a plurality of rod-shaped heat dissipation fins 14 which are integrally installed on a surface of the heat sink 12 in a predetermined arrangement, and the heat sink fins 14 Cooling fan 20 is installed on the tip side to increase the heat radiation efficiency. Reference numeral 16 denotes posts integrally formed at four sides of the heat sink 12 so as to support the cooling fan 20, and the cooling fan 20 and each post 16 are spring 30 and fastening means ( By connecting to each of the 32, the cooling fan 20 can be supported on the front end side of the heat radiation fins (14).

The heat sink 10 configured as described above is disposed so that a plane opposite to a surface on which the heat dissipation fins 14 are formed in the heat sink 12 is in contact with the heat dissipation object (eg, an inverter), thereby dissipating heat generated from the heat dissipation object. Done.

By the way, looking at the process of manufacturing the heat sink 10, a plurality of heat sink fins 14 and the support 16 by cutting one surface of the aluminum (hereinafter, used to mean "aluminum alloy"). However, since the number of the heat radiation fins 14 is large and the spaces of the front, rear, left, and right sides of the heat radiation fins 14 are dense, the processing time is long, which is not suitable for mass production, and the manufacturing cost is excessively increased. . In addition, in consideration of the fact that many heat dissipation fins 14 should be formed by cutting, since there is a limit in reducing the cross-sectional area of the heat dissipation fins 14, there is a problem that the weight of the heat sink 10 cannot be reduced.

Meanwhile, another example of the heat sink is shown in FIG. The heat sink 40 of FIG. 2 includes a heat dissipation plate 42 and a plurality of plate-type heat dissipation fins 44 integrally formed on one surface of the heat dissipation plate 42 side by side at predetermined intervals. The heat sink 40 of FIG. 2 is also arranged so that the surface opposite to the surface on which the heat dissipation fins 44 are formed in the heat sink 42 is in contact with the heat dissipation object, thereby dissipating heat generated from the heat dissipation object.

However, referring to the process of manufacturing the heat sink 40 of FIG. 2, since the heat sink 42 and the heat dissipation fins 44 may be extruded to be formed at the same time, the productivity of the heat sink 40 may be increased. There is an advantage to this.

However, in the heat sink 40 of FIG. 2, since it is difficult to make the thickness of the heat radiation fin 44 thin due to the characteristics of extrusion molding, the tip of the heat radiation fin 44 must be made thinner than other portions. Therefore, considering that the more the contact surface of the external air required for heat dissipation in terms of heat transfer, and the thinner the thickness of the heat dissipation fin 44, the heat dissipation performance is improved, in the case of the heat sink 40 of FIG. Not only is there a limit to this, but there is a problem that the miniaturization and weight reduction of the heat sink 40 cannot be achieved.

The present invention has been made in consideration of the above-described conventional problems, and an object thereof is to provide a high performance heat sink capable of achieving excellent heat dissipation, miniaturization, weight reduction and productivity.

In order to achieve the above object, the high-performance heat sink according to the present invention, a plurality of grooves (groove) on one surface and the heat sink is formed side by side at a predetermined interval; One side of the U-turn (U-Turn) bent portion is inserted into the grooves are corrugated (Corrugate) type heat radiation fins that are brazed (Brazing); characterized in that it comprises a.

The groove is preferably formed in a shape corresponding to the U-turn bend.

In addition, it is preferable that a plurality of louvers are formed in a predetermined array on the heat dissipation fins.

In addition, the high-performance heat sink manufacturing method according to the present invention comprises the steps of forming a plurality of grooves on one surface of an aluminum material side by side at a predetermined interval to form a heat sink; Coupling a corrugated heat sink to a heat sink by inserting one U-turn bend into the groove; And brazing the assembly of the heat sink and the corrugated heat dissipation fins.

In the brazing bonding step, the corrugated heat dissipation fin is preferably formed of an aluminum clad material and brazed to the heat sink.

In addition, after the coupling step of the heat sink and the corrugated heat sink fin, the aluminum clad material may be applied to the contact portion between the heat sink and the corrugated heat sink fin to be brazed.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are based on the principle that the inventor can appropriately define the concept of terms in order to explain the invention in the best way. It should be interpreted as meanings and concepts corresponding to

3 and 4, a high performance heat sink according to the present invention is shown.

As shown in FIG. 3, the high performance heat sink 100 according to the present invention includes a heat sink 110 and a corrugated heat dissipation fin 120 brazed to the heat sink 110.

The heat dissipation plate 110 is preferably formed of aluminum, and as shown in FIG. 4, a plurality of grooves 112 are formed side by side at predetermined intervals. The grooves 112 may be formed by a plurality of protruding ribs 114 formed side by side at predetermined intervals, and may be formed in a concave shape on one surface of the heat sink 110 although not shown here. have.

The corrugated heat dissipation fin 120 is formed by folding a thin aluminum plate so that the peak portion and the valley portion are alternately formed, and one side of the U-turn bent portion (ie, the peak portion) 122 is formed in the groove 112. It is inserted into the brazing bond, it can be bonded to the heat sink (110).

It is preferable that a plurality of louvers 124 are formed in a predetermined arrangement in the heat dissipation fin 120 so as to increase the specific surface area to increase the heat dissipation efficiency, and the louvers 124 are the corrugated type. It may be formed at the same time in the process of forming the wrinkles in the manufacturing of the heat dissipation fin 120.

In addition, according to the present invention, so that the brazing bonding of the heat sink 110 and the corrugated heat sink fin 120 can be performed well, as shown in FIG. 5, the groove 112 has a U-turn bend 122. It is preferable that it is formed in the shape corresponding to (i.e., U shape).

Next, a method of manufacturing a high performance heat sink configured as described above will be described with reference to FIGS. 6 and 7.

First, one surface of an aluminum material is processed to form a heat dissipation plate 110 in which a plurality of grooves 112 are arranged side by side at predetermined intervals. In the step of forming the heat sink 110, the groove 112 may be formed in a concave shape, as well as by cutting the edge of one surface of the heat sink 110 in the concave state as described above, Figs. 4 and 5 may be formed by a plurality of protruding ribs 114 arranged side by side at a predetermined interval. In addition, the heat sink 110 may be manufactured by extrusion molding so that the grooves 112 are formed for the convenience of manufacturing. The aluminum material is extruded to form the grooves 112, and cut to a predetermined length. By cutting the edge of the surface on which the grooves 112 are formed, it can be easily manufactured.

And, in the manufacturing step of the heat sink 110, the groove 112 is preferably formed in a shape corresponding to the U-turn bent portion 122 of the corrugated heat radiation fin 120, that is, U-shaped.

Next, the corrugated heat dissipation fin 120 is prepared, and the U-turn bends 122 disposed on one side of the corrugated heat dissipation fin 120 are inserted into the grooves 112 of the heat dissipation plate 110 to form the corrugation. The heat sink fin 120 is coupled to the heat sink (110).

The corrugated heat dissipation fins 120 may be manufactured by an integrated process of processing a thin aluminum plate by a forming roller to corrugate the same and forming a louver 124, and cutting the thin plate to a length suitable for the heat dissipation plate 110. Can be.

Next, the U-turn bent portion 122 of one of the corrugated heat sink fins 120 is inserted into the groove 112 of the heat sink 110 to couple the corrugated heat sink fin 120 to the heat sink 110. .

Next, the assembly of the heat dissipation plate 110 and the corrugated heat dissipation fins 120 is placed in a brazing furnace, and the corrugated heat dissipation fins 120 are brazed and bonded to the heat dissipation plate 110, thereby providing high-performance heat according to the present invention. The manufacture of the sink 100 is completed.

In the brazing bonding step, the corrugated heat dissipation fins 120 are preferably made of aluminum clad material and brazed to the heat dissipation plate 110. That is, the clad material is melted at the contact portion of the heat sink 110 and the corrugated heat sink fin 120 by heating by the brazing furnace, and the melted portion is cooled, thereby brazing the heat sink 110 and the corrugated heat sink fin 120. Can be bonded.

In addition, as another method of brazing bonding, as shown in FIG. 7, after the coupling step of the heat sink 110 and the corrugated heat sink fin 120, the contact portion between the heat sink 110 and the corrugated heat sink fin 120. An aluminum clad material may be applied to the brazing joint. That is, the clad material applied to the contact portion between the heat sink 110 and the corrugated heat sink fin 120 is melted by heating by the brazing furnace, and the melted portion is cooled to cool the heat sink 110 and the corrugated heat sink fin 120. This can be brazed.

The high-performance heat sink of the present invention manufactured as described above can not only manufacture the corrugated heat dissipation fin 120 consistently, but also process and braze bonding can be performed in a consistent process, so that mass production is possible. Do. In addition, not only the corrugated heat dissipation fin 120 can be manufactured from a thin aluminum sheet, but also the corrugated pitch spacing can be made compact, so that the specific surface area for heat dissipation can be increased, and the size thereof is made small. Light heat sinks can be manufactured. In addition, the specific surface area of the corrugated heat dissipation fin 120 may be further increased by the louver 124.

According to the high performance heat sink and the manufacturing method according to the present invention configured as described above, since the heat sink can be mass-produced by performing each step of the manufacturing process in a consistent process, the production cost of the heat sink can be reduced and the productivity can be improved. can do.

In addition, since the corrugated heat dissipation fin 120 may be manufactured from an aluminum thin plate, the weight of the heat sink may be reduced.

In addition, since the corrugated pitch spacing of the corrugated heat dissipation fins 120 can be made compact, the heat dissipation performance of the heat sink can be increased by increasing the specific surface area, thereby obtaining sufficient heat dissipation effect even if the heat sink is made small. Can be. In addition, this effect can be further enhanced by increasing the specific surface area by the louver 124.

Claims (6)

A heat sink 110 having a plurality of grooves 112 formed on one surface side by side at a predetermined interval; A high-performance heat sink comprising a; a corrugated heat dissipation fin 120 is inserted into one side of the grooves U-turn bent portion 122 is brazed (brazing) . The method of claim 1, The groove 112 is a high-performance heat sink, characterized in that formed in a shape corresponding to the U-turn bend (122). The method according to claim 1 or 2, The heat dissipation fin 120, a plurality of louvers (Louver, 124) is a high performance heat sink, characterized in that formed in a predetermined arrangement. Forming a heat sink 110 by forming a plurality of grooves 112 side by side at a predetermined interval on one surface of the aluminum material; Coupling a corrugated heat dissipation fin 120 to a heat sink by inserting one side of the U-turn bend 122 into the groove; And, Brazing the assembly of the heat sink and the corrugated heat sink fin; high performance heat sink manufacturing method comprising a. The method of claim 4, wherein In the brazing bonding step, the corrugated heat dissipation fin 120 is formed of an aluminum clad (Clad) material is brazing bonded to the heat sink 110, characterized in that the high-performance heat sink manufacturing method. The method of claim 4, wherein After the coupling step of the heat sink 110 and the corrugated heat dissipation fin 120, by applying an aluminum clad material to the contact portion of the heat sink and the corrugated heat dissipation fins, the high-performance, characterized in that for brazing the heat sink and corrugated heat dissipation fins Heat sink manufacturing method.

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