CN203554876U

CN203554876U - Integrally-molded heat radiating fin

Info

Publication number: CN203554876U
Application number: CN201320696075.9U
Authority: CN
Inventors: 陈勇; 常青保
Original assignee: SICHUAN HUALI ELECTRONIC CO Ltd
Current assignee: SICHUAN HUALI ELECTRONIC CO Ltd
Priority date: 2013-11-07
Filing date: 2013-11-07
Publication date: 2014-04-16
Anticipated expiration: 2023-11-07

Abstract

The utility model discloses an integrally-molded heat radiating fin, which comprises a heat absorbing bottom (1) and a heat radiating tooth sheet (2), wherein the heat absorbing bottom (1) and the heat radiating tooth sheet (2) are of an integral structure, not any other materials or auxiliary materials exist between the heat absorbing bottom (1) and the heat radiating tooth sheet (2), the heat radiating tooth sheet (2) is arranged on the surface of the heat absorbing bottom (1) in a manner of being inclined to the heat absorbing bottom (1), the thickness of the heat absorbing bottom (1) is less than 20mm, the height of the heat radiating tooth sheet (2) is less than 120mm, the width w of the heat radiating tooth sheet (2) is less than 500mm, the thickness t of the heat radiating tooth sheet (2) ranges from 0.6 to 2mm, the pace of the heat radiating tooth sheet (2) ranges from 2.5 to 16mm, and the length L of the heat absorbing bottom (1) is less than 2000mm. The integrally-molded heat radiating fin has the beneficial effects of low cost, good heat conduction performance, low thermal resistance and the like.

Description

A kind of one-body molded fin

Technical field

The utility model relates to fin heat dissipation technology field, particularly a kind of one-body molded fin.

Background technology

Along with scientific and technical high speed development, as heater members IGBT module main in heater members power amplifier module main in high-power transmitter, industrial equipment.For guaranteeing the superiority of each performance index of module, power improves constantly, and causes caloric value very large.Thereby how research better goes out the dissipation of heat producing on electronic equipment, the control of inside modules temperature is solved to heat dissipation problem has within the specific limits become problem in the urgent need to address of electron trade, otherwise equipment performance cannot improve or cannot normally work.

Heat dissipation design is regarded an integral body as fin conventionally, and fin has the function of heat absorption, heat transfer, heat radiation.Heat absorption represent heat by heating element the conductive process to fin bottom, be the beginning of heat radiation process.Heat transfer is the heat of base plate absorption to be conducted to each part of gear piece, and the combination between base plate and gear piece has significant impact to heat sink conducts heat ability.Heat radiation: the heat absorption of fin, conduction are all heat radiation service.No matter be to carry out that nature is cooling, forced air cooling, be all heat radiation gear piece row heat exchange distribute heat during with air, the design of fin gear piece and processing technology structure are the emphasis of heat dissipation design.As closeer in gear piece, surface area is larger, just larger with the area of air heat exchange, therefore can obtain better radiating effect.But gear piece is crossed secret meeting, increase windage, affect circulation of air, increase fin manufacture difficulty, increase manufacturing cost.Therefore heat dissipation design is between a plurality of conflicting factors, to obtain the result of optimum balance.

Conventional fin in current equipment, manufacture is section bar and gear shaping, and shape technique is subject to formed in mould restriction, and the gear piece physical dimension of section bar is larger, uses raw material to increase while making to produce fin, directly causes cost to increase.But, along with the continuous increase of electronic chip current density, its shortcoming also comes out gradually, and owing to being subject to, the density ratio of limiting heatsink fin of mould strength is lower, can not meet the heat radiation requirement of the electronic equipment of develop rapidly.Gear shaping technique is fastenedly connected heat radiation gear piece in groove corresponding to radiating bottom plate by impact style or similar being fastenedly connected, and area of dissipation is large, at aspect of performance, is slightly better than aluminium section bar fin.But base plate can not guarantee to contact completely with gear piece riveted joint face, has interface impedance, and impact heat passes effect, poor thermal conduction.For meeting radiating requirements, will increase product size, just can increase material cost, use section bar and gear shaping fin very uneconomical.

Utility model content

The purpose of this utility model is to overcome the shortcoming of prior art, provides that a kind of cost is low, the one-body molded fin of good heat conductivity, low thermal resistance.

The purpose of this utility model is achieved through the following technical solutions: a kind of one-body molded fin, it comprises the heat absorption end and heat radiation gear piece, the heat absorption end and heat radiation gear piece are integral type structure, heat radiation gear piece favour heat absorption the end be arranged on heat absorption basal surface on, heat absorption base thickness degree is less than 20mm, and heat radiation tooth height is less than 120mm, and heat radiation gear piece width W is less than 500mm, heat radiation gear piece thickness t value is 0.6 ~ 2mm, and heat radiation gear piece step pitch P value is 2.5 ~ 16mm.

At the bottom of described heat absorption, length L is less than 2000mm.

The utlity model has following advantage: (1) the utility model absorbs heat between the end and heat radiation gear piece without medium or contact heat resistance, good heat conductivity, heat radiation gear piece width W value can reach 500mm, and existing fin Breadth Maximum only has 200mm, has therefore further improved heat-conducting effect.(2) material at the heat absorption end is aluminum plate stock and purchases convenience, and existing fin weight saving 30%, reduces device structure and simplify on year-on-year basis, and does not need separately to open new die because sharing related die material, has reduced production cost.(3) the heat absorption end and heat radiation gear piece are integral type structure, between the heat absorption end and heat radiation gear piece, without any other material or auxiliary material, have guaranteed high thermoconductivity, thereby have reduced thermal resistance.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is front view of the present utility model;

Fig. 3 is vertical view of the present utility model;

Fig. 4 is left view of the present utility model;

Fig. 5 is machining sketch chart of the present utility model;

In figure, 1-absorbs heat at the end, the 2-gear piece that dispels the heat.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described, protection range of the present utility model is not limited to the following stated:

As Figure 1-4, a kind of one-body molded fin, it comprises the heat absorption end 1 and heat radiation gear piece 2, the heat absorption end 1 and heat radiation gear piece 2 are integral type structure, the absorb heat end 1 and heat radiation gear piece 2 is an integral body, between the heat absorption end 1 and heat radiation gear piece 2, without any other material or auxiliary material, heat radiation gear piece 2 favours the end 1 of absorbing heat and is arranged on and absorbs heat on basal surface, one-body molded good heat conductivity.Because the heat absorption end 1 and heat radiation gear piece 2 be integral type structure, and the heat absorption end 1 and dispelling the heat between gear piece 2 without any other material or auxiliary material, also guarantee fin high conductance, thereby reduced thermal resistance.The material at the heat absorption end 1 is aluminum plate stock, purchase conveniently, existing fin weight saving 30% on year-on-year basis, device structure is reduced and simplify, the heat absorption end 1 thickness is less than 20mm, and heat radiation gear piece 2 is highly less than 120mm, heat radiation gear piece 2 width W are less than 500mm, heat radiation gear piece 2 thickness t values are 0.6 ~ 2mm, and heat radiation gear piece 2 step pitch P values are 2.5 ~ 16mm, and heat absorption end length L is less than 2000mm.Fig. 5 is machining sketch chart of the present utility model, and cutter has processed heat radiation gear piece 2 in heat absorption on the end 1, guaranteed at the bottom of heat absorption 1 and heat radiation gear piece 2 be integral type structure.

Claims

1. an one-body molded fin, it is characterized in that: it comprises the heat absorption end (1) and heat radiation gear piece (2), the heat absorption end (1) and heat radiation gear piece (2) are integral type structure, heat radiation gear piece (2) favours the heat absorption end (1) and is arranged on heat absorption (1) surface, the end, the heat absorption end (1) thickness is less than 20mm, heat radiation gear piece (2) is highly less than 120mm, heat radiation gear piece (2) width W is less than 500mm, heat radiation gear piece (2) thickness t value is 0.6 ~ 2mm, and heat radiation gear piece (2) step pitch P value is 2.5 ~ 16mm.

2. a kind of one-body molded fin according to claim 1, is characterized in that: at the bottom of described heat absorption, (1) length L is less than 2000mm.