CN2480988Y

CN2480988Y - Heat sink

Info

Publication number: CN2480988Y
Application number: CN 01206740
Authority: CN
Inventors: 刘永言; 赵伟; 郑友斌; 王勇
Original assignee: XIWANG ELECTRONIC INST CHENGDU
Current assignee: Chengdu Hope Electronic Institute Co., Ltd.
Priority date: 2001-07-05
Filing date: 2001-07-05
Publication date: 2002-03-06
Anticipated expiration: 2011-07-05

Abstract

The utility model discloses a heat sink which consists of a basal plate and cooling fins. The basal plate is provided with trapezia connecting bosses, a groove is arranged at the middle of the end of each trapezia connecting boss, the joints of the cooling fins and the basal plate are provided with connectors, the ends of the connectors are provided with trapezia grooves, and an V-shaped inclined and narrow groove is arranged at the bottom of each trapezia groove along the edge of the groove. During assembly, the heat sink is applied with pressure, the connecting bosses of the basal plate are closely pressed into the grooves of the connectors of the cooling fins, by deformation of the end of the connecting bosses of the basal plate, the basal plate and the cooling fins are connected firmly. The structure is of simple process and high heat dissipation efficiency.

Description

Radiator

The utility model belongs to field of power electronics, and it is the radiator of a kind of belt substrate and fin.

Traditional radiator of forming by substrate and fin, the technology that is connected of its substrate and fin often adopts crimping, bonding or welding, and these all respectively have shortcoming.Though common crimping efficient height is subjected to the restriction of mould processing technology, the dummy slider groove is more shallow, causes the contact-making surface of substrate and fin few, is generally line contact or some contact, and radiating efficiency is low; Bonding owing to the restriction that is subjected to adhesives, the one, manufacturability is poor, and the 2nd, complex process, the 3rd, curing time is long, and the 4th, bonding agent solidifies inside, back and exists air air gap heat transfer efficiency low, and the 5th, cost is higher; Weld also complex process, cost is higher.

The radiator of forming by substrate and fin that the purpose of this utility model provides that a kind of processing technology is simple, radiating efficiency is high.

To achieve these goals, the utility model is made up of substrate and fin, with the junction of fin the trapezoidal boss that is connected is arranged on the substrate, and the end is narrow, the bottom is wide, and is fluted in the middle of the end of trapezoidal connection boss.There is connector junction with substrate on the fin, and there is trapezoidal groove the end of connector, and slot opening, bottom land are narrow, the crossheading limit, bottom of this trapezoidal groove each and an oblique narrow groove, two oblique narrow grooves become splayed to be symmetrically distributed, between form trapezoid boss.

During assembling, the connection boss on the substrate is pressed in the groove of the connector on the fin.

Because connection boss on the substrate and the connector on the fin have adopted long length of fit and tapering to add interference fit, be aided with the back locking function after the crimping, fin and substrate are closely cooperated, increased contact area, effectively improved heat-transfer effect, assembling intensity also improves greatly.This structure only depended on pressure reaches firm assembling, so technology is simple, the efficient height.

The utility model is described in further detail below in conjunction with accompanying drawing.

Figure one is radiator assembling schematic diagram.

Figure two is the radiator base plate schematic diagram.

Figure three is the radiator fin schematic diagram.

Shown in the figure one, radiator is made up of substrate 1 and fin 4, and the trapezoidal connection boss 2 on the substrate 1 is pressed in the trapezoidal groove of the connector 5 on the fin 4.With the junction of fin the trapezoidal boss 2 that is connected is arranged on the substrate 1 shown in the figure two, the end is narrow, and the bottom is wide, its end middle fluted 3.Shown in the figure three, fin 4 has connector 5 with the junction of substrate 1, and there is trapezoidal groove 7 end of connector 5, slot opening, bottom land is narrow, and the crossheading limit, bottom of trapezoidal groove 7 respectively has between oblique narrow groove 6 that 18 font is symmetrically distributed and 9, two skewed slots 6 and 9 and forms trapezoid boss 8.

When substrate 1 and fin 4 assemblings, only need on fin 4, to exert pressure, boss 2 is pressed in the trapezoidal groove 7 of connector 5.At this moment, groove 3 two sides on the boss 2 are deformed in the two oblique narrow grooves 6 and 9 that are pressed in the connector 5, and boss 2 and connector 5 closely are fixed together, and have reached purpose fixing and that conduct heat.

Boss 2 and groove 7 also can all be made the rectangle of not being with gradient, adopt during assembling to be slidingly matched.

Mandatory declaration be, reach by the distortion of certain part on fin in the radiator or the substrate and make the purpose of locking that fin do not get loose, all belong to the protection range of this patent.

Claims

1. radiator of forming by substrate and fin, it is characterized in that: with the junction of fin the trapezoidal boss that is connected is arranged on the substrate, the end is narrow, and the bottom is wide, and is fluted in the middle of the end of trapezoidal connection boss; There is connector junction with substrate on the fin, there is trapezoidal groove the end of connector, slot opening, bottom land is narrow, respectively there is an oblique narrow groove on the crossheading limit, bottom of this trapezoidal groove, and two oblique narrow grooves become splayed to be symmetrically distributed, between form trapezoid boss, during assembling, the connection boss on the substrate is packed in the groove of the connector on the fin.

2. radiator according to claim 1 is characterized in that: the gradient of above-mentioned trapezoidal connection boss is equal to or greater than the gradient of above-mentioned trapezoidal groove.

3. radiator according to claim 1 is characterized in that: the width of described trapezoidal connection boss end is equal to or less than the width of described trapezoidal groove bottom.