KR20110051071A

KR20110051071A - Heat emission unit for led fluorescent lamp

Info

Publication number: KR20110051071A
Application number: KR1020090107727A
Authority: KR
Inventors: 이윤희
Original assignee: 주식회사 렉스모바일
Priority date: 2009-11-09
Filing date: 2009-11-09
Publication date: 2011-05-17

Abstract

Disclosed is a heat dissipation unit to which heat dissipation by air circulation is applied together with dissipation by heat conduction. The heat dissipation unit may include a single body in which a sealed space in which air is circulated is formed, and the body includes: a support plate on which the LED module is mounted; A heat dissipation cover connected to both ends of the supporting plate in a width direction to form the sealed space, and having at least one pair of air discharge holes and inlet holes formed therein; And a plurality of heat dissipation vanes integrally protruding from the rear surface of the support plate along the longitudinal direction.

Heat conduction, convection, air circulation, LED, fluorescent tube, heat emission, heat dissipation wing

Description

Heat emission unit for LED fluorescent lamp

The present invention relates to a heat dissipation unit for LED fluorescent lamps, and more particularly, to a heat dissipation unit to which heat dissipation by air circulation is applied together with dissipation by heat conduction.

Compared to incandescent bulbs, there is less glare, high luminous efficiency, and long life, so one of the lighting fixtures used is fluorescent lamp.

Fluorescent lamps use light from the discharge in the gas as a light source, and a small amount of mercury vapor and argon gas are easily sealed in a vacuum glass tube, and electrodes are attached to both ends. The fluorescent lamp thus constructed has a high efficiency due to less loss due to heat and a long lifespan.

However, since the fluorescent lamp is constructed using a vacuum glass tube as described above, since the vacuum glass tube must be sufficiently sealed during manufacture, there are many difficulties in manufacturing, and there is a case where it is not suddenly turned on and flickers when the life is near. Distance is a problem. In addition, since the light generated by the conventional fluorescent lamp includes ultraviolet rays that degrade color, there is a problem of deteriorating food when used in a refrigerator or the like. In addition, if the frequent switching operation is made, the life is drastically shortened, there is a problem that requires a lot of power consumption.

In order to solve this problem, a fluorescent lamp using an LED has been developed and used, but in the fluorescent lamp using the LED, heat generated from the LED is released by heat conduction through a heat radiation fin or a heat dissipation blade which is mostly made of metal.

However, this method has a problem in that heat cannot be released quickly and efficiently.

Accordingly, it is an object of the present invention to provide a heat dissipation unit that can quickly and efficiently discharge heat generated from LEDs.

The above object is a heat dissipation unit for dissipating heat generated from an LED module mounted with a plurality of LEDs on a substrate, and comprises a single body having a sealed space in which air is circulated, and the body is exposed. A support plate on which the LED module is mounted; A heat dissipation cover connected to both ends of the supporting plate in a width direction to form the sealed space, and having at least one pair of air discharge holes and inlet holes formed therein; And a heat dissipation unit for an LED fluorescent lamp composed of a plurality of heat dissipation vanes integrally protruding integrally from the back surface of the support plate in the longitudinal direction.

Preferably, the diameter of the air discharge hole may be formed larger than the diameter of the air inlet hole.

In addition, preferably, at least one end of the heat dissipation wing, a cylindrical air circulation member in the longitudinal direction may be coupled.

More preferably, at least one end of the heat dissipation vane, a half of the cross section through the longitudinal direction to form an air circulation space, the rest is closed to form a closed space of the air circulation member injected with a cooling medium Can be combined.

According to the above structure, it is possible to use heat release by air circulation in addition to heat release through heat conduction, and to release heat quickly and efficiently.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a heat dissipation unit according to an embodiment of the present invention.

Referring to FIG. 1, the heat dissipation unit 10 is formed of a single body in which a sealed space in which air is circulated is formed.

The material of the body can be produced by injection molding, for example, aluminum having excellent thermal conductivity. Although not shown, the heat dissipation unit 10 is combined with the transparent front cover through which the light emitted from the LED to form a fluorescent lamp. This will be described later.

The sealed space of the heat dissipation unit 10 is surrounded by the support plate 11 and the heat dissipation cover 13 integrally coupled thereto, and the terminal cap is fitted at both ends in the longitudinal direction, resulting in a sealed space.

On the exposed surface of the support plate 11, a pair of brackets 14 and 14a protrude and extend in the longitudinal direction. Between the brackets 14 and 14a, the substrate 20 on which the LEDs 22 are mounted is fitted and fixed. do. Therefore, the light emitted from the LED 22 is emitted to the opposite side of the heat dissipation unit 10.

At the boundary between the support plate 11 and the heat dissipation cover 13, engaging grooves 12 and 12a for engaging the front cover are formed.

The heat dissipation cover 13 has a semicircular cross section, and an unevenness is formed along the circumference of the outer surface to increase the heat dissipation area.

According to this structure, the heat generated from the LED 22 is transferred to the support plate 11 through the substrate 20, and then transferred to the heat dissipation cover 13 is released to the outside. That is, heat release by heat conduction occurs.

Again, referring to FIG. 1, through holes 13a and 13b are formed at four corners of the heat dissipation cover 13 for air inlet or outlet.

The through holes 13a and 13b may have the same size, but may be formed in different sizes. In this case, according to the experiments of the present inventors, it was confirmed that hot air in the closed space is discharged through the large through hole, and external cold air is introduced through the small through hole. It is expected that through-holes having a large diameter in the air flow are selected first by expansion of air in the closed space by heating.

According to the present invention, a plurality of heat dissipation vanes 15, 16, 17 protrude integrally along the longitudinal direction of the support plate 11. In FIG. 1, although the heat dissipation vanes 15, 16, and 17 have a fan-shaped shape, the heat dissipation vanes may be formed in a cross shape without being limited thereto.

According to this configuration, the heat generated from the LED 22 is transferred to the support plate 11 through the substrate 20, the air in the sealed space in direct contact with the support plate 11 is heated by the heat transferred from the support plate 11 do. As the air inside the enclosed space is heated, circulation due to the expansion of the air and the temperature difference occurs, and as a result, air is released through the large diameter through hole 13b and externally cooled through the small diameter through hole 13a. Air enters. Accordingly, the air inside the sealed space is rapidly cooled, and the support plate 11 directly in contact with the sealed space is also rapidly cooled, thereby efficiently cooling the heat generated from the LED 22.

On the other hand, preferably, at the end of the heat dissipation blade 17, a cylindrical air circulation member 18 is coupled along the longitudinal direction.

Here, both ends of the air circulation member 18 may be opened or closed to a closed space, when the air circulation member 18 is closed to form a through hole for air discharge and inflow on the side of the air circulation member (18).

According to this structure, the heat dissipation area of the heat dissipation blade 17 is substantially increased, while air is heated faster because the space inside the air circulation member 18 is smaller, thereby accelerating air circulation due to a temperature difference from the enclosed space. do.

2 is a perspective view showing an air circulation member according to a modification of the present invention.

According to this example, the air circulation member 30 forms a cylindrical shape, a portion corresponding to half of the cross section penetrates in the longitudinal direction to form an air circulation space 34, and the other half is a closed space 31. ) Is injected into the cooling medium.

In this example, as described above, through holes 32 and 33 are formed to connect the air circulation space 34 and the sealed space.

According to this configuration, unlike the air circulation member 18 of FIG. 1, the air is slowly heated in the air circulation space 34 by the cooling medium injected into the closed space 31, and thus the temperature difference between the air circulation member 18 and the sealed space. Air circulation is accelerated.

In the above description, the embodiment of the present invention has been described, but various changes can be made at the level of those skilled in the art. Therefore, the scope of the present invention should not be construed as being limited to the above embodiment, but should be interpreted by the claims described below.

Claims

A heat dissipation unit for dissipating heat generated from an LED module mounted with a plurality of LEDs on a substrate,

Consists of a single body with a closed space in which air is circulated,

The body,

A support plate on which the LED module is mounted on an exposed surface;

A heat dissipation cover connected to both ends of the supporting plate in a width direction to form the sealed space, and having at least one pair of air discharge holes and inlet holes formed therein; And

The heat dissipation unit for LED fluorescent lamps, characterized in that consisting of a plurality of heat dissipation blades protruding integrally along the longitudinal direction from the back surface of the support plate.

The method according to claim 1,

The diameter of the air discharge hole is a heat radiation unit for LED fluorescent lamps, characterized in that larger than the diameter of the air inlet.

The method according to claim 1,

At least one end of the heat dissipation wing, the heat radiation unit for LED fluorescent lamps, characterized in that the tubular air circulation member is coupled along the longitudinal direction.

The method according to claim 1,

At least one end of the heat dissipation vane, a half of the cross-section in the longitudinal direction penetrates in the longitudinal direction to form an air circulation space, the rest is closed to form a closed space is coupled to the air circulation member injected with the cooling medium Heat dissipation unit for LED fluorescent lamps.