CN201440053U

CN201440053U - Heat dissipating sectional material

Info

Publication number: CN201440053U
Application number: CN2009201756805U
Authority: CN
Inventors: 卿笃碑
Original assignee: Dongguan Kingsun Optoelectronic Co Ltd
Current assignee: Dongguan Kingsun Optoelectronic Co Ltd
Priority date: 2009-09-09
Filing date: 2009-09-09
Publication date: 2010-04-21
Anticipated expiration: 2019-09-09

Abstract

The utility model provides a heat dissipating sectional material and relates to an engineering heat dissipating device, in particular to a heat dissipating sectional material for accelerating the heat dissipation of electronic products. The utility model realizes the goal of active heat dissipation of the sectional material through the structural improvement of the existing heat dissipating sectional material. The technical scheme is that the heat dissipating sectional material comprises a heat dissipating base plate and a heat dissipating piece arranged on the heat dissipating base plate. The heat dissipating piece and the heat dissipating base plate are joined together into a tubular shape. The top of the section is arc-shaped. As a further improvement, ribs can be axially arranged at the external part of the heat dissipating piece. As a further improvement, ribs can be axially arranged at the internal part of the heat dissipating piece. The utility model has the advantages that the structure is improved, the heat dissipation method is increased and the heat dissipation efficiency is improved.

Description

Heat sink section bar

Technical field

The utility model relates to the engineering heat abstractor, and particularly electronic product is accelerated the heat sink section bar of heat radiation.

Background technology

For heat sink section bar, general scheme is that heat-radiating substrate adds radiating fin, radiating fin is for directly tabular, be distributed in (another face is installed the element that needs heat radiation) on the face of heat-radiating substrate, simultaneously can be at the rib and the recessed groove of a plurality of projectioies of each radiating fin side arrangement, the side that makes radiating fin is as ripple.

This scheme adopts thermal-radiating mode to carry out passive heat radiation, and each radiating fin and air carry out heat exchange, and rib and groove increase area of dissipation.If this radiator is installed on the LED light fixture of Shi Yonging out of doors, when wind is arranged when wind direction be when radiating fin is blown over, this radiating effect can be better; And when wind direction is blown over perpendicular to radiating fin, radiating effect relatively forward will be far short of what is expected during wind.Anyway, this scheme all is a kind of pattern of passive heat radiation, for the bigger element of some caloric values, the radiating effect of this heat sink section bar is just less desirable.

The utility model content

The purpose of this utility model is to provide a kind of heat sink section bar, improves at the structure of existing heat sink section bar, realizes the purpose of section bar active heat removal.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: heat sink section bar, and comprise heat-radiating substrate, and be arranged at the radiating piece on the heat-radiating substrate, described radiating piece combines in a tubular form with heat-radiating substrate, and the top, cross section is an arc.

As the external shaft of the described radiating piece of further improvement to being provided with fin

As the inner shaft of the described radiating piece of further improvement to also being provided with fin.

The beneficial effects of the utility model are: the utility model is with respect to straight plate radiating fin, and top, radiating piece cross section is an arc, has increased the area that radiating piece contacts with air, can pass through heat loss through radiation as straight plate radiating fin on the one hand; When on the other hand wind being arranged, when wind direction is when radiating piece is blown over, this radiating effect can be better; And when wind direction was blown over perpendicular to radiating piece, because the radiating piece top is an arcuation, wind can be advanced along this cambered surface, and the air of generation flows can through radiating piece bottom and the contacted position of heat-radiating substrate.

In addition, an advantage of the utility model maximum is that under the situation that does not have outside air to flow, the tubular conduit that radiating piece forms can produce cross-ventilation.For example: when this heat sink section bar is used for the LED light fixture, be positioned at the caloric value big (the LED bulb of head end is more relatively) of a side of lamp body head end, therefore the heat that conducts to heat sink section bar one side is many than opposite side, like this in tubular conduit, the heat of one end can be higher than the other end, the air expanded by heating of this end that heat is high, can be from then on end overflow tubular conduit (the lamp body head can be a little more than the other end on horizontal level during lamp installation, LED street lamp particularly, hot-air rises, promote more air from the head this end overflow), cause the air pressure in the tubular conduit inhomogeneous like this, outside air can enter from the tubular conduit other end by nature, replenishes air and reaches air pressure balance.Like this, just form the convection current of air, in tubular conduit, produced air and flow, blown over along radiating piece when wind is arranged, improved radiating effect greatly.Straight plate radiating fin can not produce this effect.

Description of drawings

Fig. 1, the utility model heat sink section bar structural representation.

Fig. 2, the utility model heat sink section bar end face structure figure.

Fig. 3, the utility model heat sink section bar cross-ventilation internal heat dissipating schematic diagram.

Fig. 4, the utility model heat sink section bar extraneous air heat exchange schematic diagram.

Fig. 5, the utility model heat sink section bar embodiment two structural representations.

Fig. 6, the utility model heat sink section bar embodiment biend structure chart

The specific embodiment

As Fig. 1, shown in Figure 2, the utility model heat sink section bar comprises heat-radiating substrate 1, and is arranged at the radiating piece 2 on the heat-radiating substrate 1, and described radiating piece 2 combines in a tubular form with heat-radiating substrate 1, and the top, cross section is an arc.With respect to straight plate radiating fin, top, radiating piece 2 cross section is an arc, has increased the area that radiating piece 2 contacts with air, can pass through heat loss through radiation as straight plate radiating fin on the one hand; When on the other hand wind being arranged, when wind direction is when radiating piece is axially blown over, this radiating effect can be better; And when wind direction is blown over perpendicular to radiating piece 2 (as shown in Figure 4), because radiating piece 2 tops are arcuation, wind can be advanced along this cambered surface, and the air of generation flows can through radiating piece 2 bottoms and heat-radiating substrate 1 contacted position

Under the situation that does not have outside air to flow, the tubular conduit that radiating piece 2 forms can produce cross-ventilation.As shown in Figure 3, when this heat sink section bar is used for the LED light fixture, be positioned at the caloric value big (the LED bulb of head end is more relatively) of a side of lamp body head end, therefore the heat that conducts to heat sink section bar one side is many than opposite side, like this in tubular conduit, the heat of one end can be higher than the other end, the air expanded by heating of this end that heat is high, can be from then on end overflow tubular conduit (the lamp body head can be a little more than the other end on horizontal level during lamp installation, LED street lamp particularly, hot-air rises, promote more air from the head this end overflow), cause the air pressure in the tubular conduit inhomogeneous like this, outside air can enter from the tubular conduit other end by nature, replenishes air and reaches air pressure balance.Like this, just form the convection current of air, in tubular conduit, produced air and flow, blown over along radiating piece when wind is arranged, improved radiating effect greatly.

As the embodiment two that improvement provides, as Fig. 5, shown in Figure 6, the external shaft of described radiating piece 2 is to being provided with fin 3.The inner shaft of described radiating piece 2 is to being provided with fin 3`.Be to strengthen the ability of heat exchange.

The utility model not only is confined to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but on its shape or structure, do any variation; every have identical with a utility model or akin technical scheme, all within its protection domain.

Claims

1. heat sink section bar comprises heat-radiating substrate (1), and is arranged at the radiating piece (2) on the heat-radiating substrate (1), it is characterized in that: described radiating piece (2) combines in a tubular form with heat-radiating substrate (1), and the top, cross section is an arc.

2. heat sink section bar according to claim 1 is characterized in that: the external shaft of described radiating piece (2) is to being provided with fin (3).

3. heat sink section bar according to claim 1 and 2 is characterized in that: the inner shaft of described radiating piece (2) is to being provided with fin (3`).