CN211931145U - Natural convection radiator - Google Patents

Abstract

A natural convection radiator comprises components including a bottom plate, fins, mounting holes and a heating surface, wherein the structure and connection relationship of the components are as follows: one side of the base plate is a heating surface which absorbs heat of the heating electronic element, the other side of the base plate is a fin, mounting holes are formed in the periphery of the base plate and used for fixing the electronic element, and the base plate and the fin form a whole in a brazing mode. The natural convection radiator has light weight, low cost and high heat transfer efficiency, and is suitable for light weight design of radiators of electronic components.

Description

Natural convection radiator

Technical Field

The utility model relates to an electron radiator technical field specifically is a natural convection radiator.

Background

Electronic components develop towards high integration, high density and high power, so that the heat productivity and heat flux density of electronic heating components are increased rapidly, and the internal temperature of the components is overhigh due to high-temperature environment temperature, and the precision and the operation stability of instruments and equipment are influenced. At present, the electronic field mainly uses die-casting aluminum radiators and extruded aluminum radiators for heat dissipation, but the radiators have a plurality of defects, such as large thickness of fins, heavy volume and high cost due to process limitations. For example, the die-casting aluminum radiator disclosed in the chinese patent CN203105037U and the die-casting aluminum radiator disclosed in the chinese patent CN208886732U both adopt die-casting processes, and the thickness of the fins is large, so that the weight of the whole radiator is particularly large; the IGBT radiator of the low-power frequency converter disclosed in the Chinese patent CN110310935A adopts an extrusion process, and also has the defects that the thickness of a fin cannot be further reduced and the weight is heavy due to process limitation; according to the car lamp structure with the radiating fins, which is disclosed by the Chinese patent CN207555497U, although the fins are of a stamping structure, the thickness is thinner than that of the former patent, the thickness still has a thinned space, and the fins are connected with the bottom plate through a riveting process, so that the heat transmission efficiency is influenced.

Disclosure of Invention

To the defects of the prior art, the utility model aims to provide a brazing type natural convection radiator with high efficiency, light weight and low cost.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a natural convection radiator comprises components including a bottom plate, fins, mounting holes and a heating surface, wherein the structure and connection relationship of the components are as follows: one side of the base plate is a heating surface which absorbs heat of the heating electronic element, the other side of the base plate is a fin, mounting holes for fixing the electronic element are formed in the periphery of the base plate, and the base plate and the fin form a whole in a brazing mode.

The shape of the fin is rectangular or triangular wave.

The top of the triangular wave fin is pointed, and the bottom of the triangular wave fin is a plane.

The thickness of the fin is less than 0.3 mm.

The utility model has the advantages that:

because the fins are formed by thin plates and then are brazed with the bottom plate, the radiator is made lighter, thereby reducing the material consumption and the material cost, and the weight is 10 to 30 percent lower than that of the existing radiator.

Drawings

Fig. 1 is a schematic view of a natural convection radiator assembly according to the present invention.

Fig. 2 is a cross-sectional view of the rectangular fins of the natural convection radiator of the present invention.

Fig. 3 is a cross-sectional view of the triangular fins of the natural convection radiator of the present invention.

Labeled as: the heating device comprises a fin 1, a bottom plate 2, a heating surface 3, a mounting hole 4, a rectangular fin top 5, a rectangular fin bottom 6, a triangular fin top 7, a triangular fin bottom 8, a top width d and a bottom width L.

Detailed Description

The technical constitution of the present invention will be described in further detail below with reference to the drawings and examples.

It should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" in the description of the present invention are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

As shown in fig. 1, an example of a natural convection radiator according to the present invention is disclosed. The heating device comprises a fin 1, a bottom plate 2, a heating surface 3 and a mounting hole 4. The upper surface of the bottom plate 2 is provided with fins 1, the lower surface is provided with a heating surface 3 for absorbing heat from a heating electronic element, and the periphery of the bottom plate is provided with mounting holes 4 for fixing a natural convection radiator. The fin 1 and the base plate 2 are combined together by brazing. The fins 1 and the bottom plate 2 are combined by using a brazing process, so that the contact thermal resistance can be reduced to the greatest extent, and a higher heat dissipation effect is ensured. Meanwhile, the fins 1 are thin and light, and the weight of the whole radiator is 10-30% lighter than that of a die-casting radiator with the same heat dissipation power.

Example 2

Fig. 2 is a cross-sectional view of a rectangular fin structure of a natural convection heat sink. This rectangular fin is formed by the sheet metal through the make-up machine preparation, rectangular fin top 5 and rectangular fin bottom 6 are the plane, 5 width on rectangular fin top are little, and rectangular fin bottom 6 is wide, this kind of characteristics are, the bottom width is favorable to with the laminating of bottom plate 2 greatly, it brazes more easily, the fin of the left and right sides is connected to the key effect at rectangular fin top 5, make the left and right sides fin can support each other, ensure that thin fin can not the lodging, intensity is higher, go up the narrow wide widely structure of big interval under more do benefit to the natural convection heat dissipation of air. Wherein the top width d is 1-3mm in size, and the bottom width L is 4-7mm in size. The thickness of the fins is less than 0.3 mm.

Example 3

Fig. 3 is a cross-sectional view of a triangular fin of a natural convection heat sink. Similar to fig. 2, the bottom 8 of the triangular wave fin is also flat, except that the top 7 of the triangular wave in fig. 3 is pointed, so that the whole fin is firmer, and the whole fin is widened from bottom to top to facilitate the flow of air, so that the heat dissipation effect is better.

The working principle and the process are as follows:

the natural convection radiator is fixed on the PCB where the electronic heating component is located through the mounting hole, and the heating surface of the natural convection radiator is attached to the heating surface of the electronic heating component. The electronic heating element conducts heat to the natural convection radiator, and the heat is transferred to the surface of the fin through the bottom plate and taken away by cold air of the fin accessory to form a heat exchange process.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; those of ordinary skill in the art will understand that: modifications and equivalents of the foregoing embodiments may be made, but the invention is not to be construed as limited thereto.

Claims (4)

1. A natural convection radiator comprises components including a bottom plate, fins, mounting holes and a heating surface, and is characterized in that the structure and connection relationship of the components are as follows: one side of the base plate is a heating surface which absorbs heat of the heating electronic element, the other side of the base plate is a fin, mounting holes for fixing the electronic element are formed in the periphery of the base plate, and the base plate and the fin form a whole in a brazing mode.

2. The natural convection heat sink of claim 1 wherein the fins are rectangular or triangular in shape.

3. The natural convection heat sink of claim 2 wherein the triangular wave fins are pointed at the top and flat at the bottom.

4. The natural convection heat sink of claim 1 wherein the fin thickness is less than 0.3 mm.

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