JP3177278U - LED lighting heat dissipation structure for tunnel - Google Patents

Abstract

Provided is a tunnel LED illumination heat dissipation structure that efficiently conducts heat generated from an LED chip through a housing of an illumination device.
A light source device including a plurality of LED chips, a metal substrate that supports the plurality of LED chips, a support member that disposes the plurality of metal substrates, a power supply device that drives the light source device, A lighting device for a tunnel configured by a casing to which a power supply device and the light source device are attached, wherein the support member is made of a metal plate formed in a convex shape in a sectional view, and abuts against the back surface of the metal substrate. In addition, a heat sink made of a metal plate formed in a convex shape in cross section is attached to the back surface of the support member by thermal contact, and the heat sink and the housing are connected by thermal contact. .
[Selection] Figure 2

Description

  The present invention relates to an LED lighting heat dissipation structure for a tunnel which is used in a lighting device using an LED chip, particularly for a lighting fixture used in a tunnel, and can efficiently dissipate heat generated from the LED chip to the outside.

  In recent years, lighting fixtures using LEDs have been widely adopted. In particular, for a lamp used for a street light, a high ceiling light, etc., a technique for ensuring a required illuminance by using a number of high-brightness LEDs is widely adopted.

  On the other hand, in tunnels on expressways and ordinary roads, a large number of lighting fixtures for tunnels are used, and light sources such as fluorescent lamps are used for illumination all day. And maintenance took a lot of time and money.

  Therefore, the present inventors have proposed lighting fixtures that can be used for a long time using LED chips as tunnel lighting fixtures and street lighting fixtures (see Patent Literature 1 and Patent Literature 2). .

  Moreover, the opening provided in the back surface of the lighting fixture main body is provided with a heat dissipation member that closes the opening and extends to the gap between the fixture main body and the wall surface or ceiling surface, and the LED light source is directly sandwiched between the heat dissipation member or the heat conductive member. There is also a tunnel lighting fixture having a configuration to be provided (see Patent Document 3).

JP 2011-138640 A JP 2011-159567 A JP 2011-187304 A

  Although the lighting fixtures described in Patent Documents 1 and 2 have reduced the amount of electricity consumed and enabled long-term use, further improvements have been required regarding the heat dissipation technology that affects the life of the LED elements. Moreover, in the tunnel lighting fixture of patent document 3, although an opening is provided in the back surface of a fixture main body and effective heat radiation is aimed at by the structure which further provides the heat radiating member which obstruct | occludes this opening, the number of parts of an illuminating device increases. At the same time, there is a problem that the manufacturing cost increases.

  In view of the above problems, the present inventors have provided a tunnel LED illumination heat dissipation structure that can effectively dissipate heat generated in an LED chip through a housing of an existing lighting fixture.

  The LED illumination heat dissipation structure for a tunnel according to the present invention includes a plurality of LED chips, a metal substrate that supports the plurality of LED chips, a light source device that includes a plurality of support members that dispose the plurality of metal substrates, and the light source device. A lighting device for a tunnel configured by a power supply device to be driven and a casing to which the power supply device and the light source device are attached, wherein the support member is formed of a metal plate formed in a convex shape in a sectional view, and the metal A heat sink made of a metal plate formed in a convex shape in a sectional view is attached to the back surface of the support member while being in contact with the back surface of the substrate, and is attached to the back surface of the support member. The first feature is that they are connected in contact.

  The second feature is that the support member, the heat sink, and the housing are in thermal contact with an adhesive sheet having thermal conductivity made of silicone resin or the like.

  According to the LED illumination heat dissipation structure for a tunnel of the present invention, the support member is a support member made of a metal plate formed in a convex shape in a sectional view, and is connected in contact with the back surface of the metal substrate, and the heat sink A heat sink made of a metal plate formed in a convex shape in a sectional view is attached to the back surface of the metal plate in thermal contact, and the heat sink and the housing are in thermal contact, so that the heat contact area is greatly increased. This makes it possible to easily dissipate heat to the housing side.

  In addition, since the support member, the heat sink, and the casing are connected by a pressure-sensitive adhesive sheet made of silicone resin or the like, the support member, the heat sink, and the housing have an effect that the heat contact surface has excellent adhesion.

BRIEF DESCRIPTION OF THE DRAWINGS (a) which shows the illuminating device of the LED illumination heat dissipation structure for tunnels which concerns on this invention is a side view, (b) is a top view. FIG. 2 is a perspective view of FIG. 1. It is a perspective view explaining a thermal radiation structure. It is sectional drawing which follows the AA line of FIG.

  Hereinafter, although this invention is demonstrated, referring drawings which show an Example, it cannot be overemphasized that this invention is not limited to a present Example. 1A and 1B show a lighting device of a tunnel LED illumination heat dissipation structure according to the present invention. FIG. 1A is a side view, FIG. 2B is a plan view, FIG. 2 is a perspective view of FIG. 4 is a cross-sectional view taken along line AA in FIG.

  As shown in FIGS. 1 to 3, the lighting device 100 having the LED lighting heat dissipation structure for a tunnel according to the present invention includes a metal substrate 3 on which a plurality of LED chips 2 are mounted, and a thermal contact with the metal substrate 3. A light source device 1 including a support member 4 attached to the housing 5 is attached to a housing 5 by a fixing member 6. And the heat sink 7 is attached to the back surface of the support member 4, and is thermally connected with the housing | casing 5 through the adhesive sheet 16 which has the thermal conductivity mentioned later.

  The metal substrate 3 is made of a metal having high thermal conductivity such as Al, and a circuit (not shown) is formed on the surface of the metal substrate 3 via an electrical insulating layer. A plurality of LED chips 2 are mounted at predetermined positions of the circuit.

  The support member 4 is made of an Al plate formed in a convex shape in cross section, and a plurality of metal substrates 3 are attached to the upper surface thereof by thermal contact, and attached by screws across the rectangular hole portion 8 formed in the fixing member 6. It has been. The fixing member 6 includes a power source device 10 that drives the light source device 1, a power source terminal 12 that is connected to an external power source (not shown) via a cable 11, and a light control device that controls the light source device 1. 13 is further attached to the housing 5.

  The casing 5 is formed into a saddle shape with one end opened by pressing a stainless steel plate. The surface of the casing 5 is powder-coated and has excellent mechanical strength and weather resistance.

  The fixing member 6 is made of a rectangular Al plate, has bent pieces 14 on each of its four sides, and has a rectangular hole portion 8 facing the support member 4 at substantially the center. The power supply device 10, the light control device 13, and the support member 4 described above are attached to the upper surface of the fixing member 6.

  As shown in FIG. 4, the heat sink 7 is an Al plate formed into a convex shape in a sectional view, and the convex portion is closely attached to the lower surface of the support member 4, and the lower bent pieces 15, 15. A pressure-sensitive adhesive sheet 16 made of silicone resin is adhered to the inner surface of the housing 5 through the pressure-sensitive adhesive sheet 16.

  The power supply device 10 incorporates a converter that supplies DC power from an external AC power source (not shown) to the light source device 1 and is connected to the light source device 1 by a cable to light the LED chip 2. The light control device 13 adjusts the output of the power supply device 10 in order to stably supply the optimum illuminance in the tunnel.

  The LED illumination heat dissipating structure for a tunnel having the above configuration includes a light source device 1 including a metal substrate 3 on which an LED chip 2 is mounted and a support member 4 attached in thermal contact with the metal substrate. 5, and the heat sink 7 attached in close contact with the back surface of the support member 4 is attached to the inner surface of the housing 5 via the adhesive sheet 16, so that the heat generated in the LED chip 2 is transferred from the metal substrate 3 to the support member. 4 and the heat sink 7 can dissipate heat to the housing 5.

  As described above, according to the LED illumination heat dissipation structure for a tunnel of the present invention, since the support member, the heat sink, and the housing are connected in thermal contact, heat is easily radiated from the housing to the outside. Moreover, since the heat sink and the inner side surface of the housing are connected by a heat conductive adhesive sheet made of silicone resin, it is possible to greatly increase the area in thermal contact, making it easier to dissipate heat to the housing side. Deterioration of the LED chip can be prevented.

DESCRIPTION OF SYMBOLS 1 Light source device 2 LED chip 3 Metal substrate 4 Support member 5 Case 6 Fixing member 7 Heat sink 8 Rectangular hole part 10 Power supply device 11 Cable 12 Power supply terminal 13 Light control device 14 Bending piece 15 Lower bending piece 16 Adhesive sheet 100 Illumination device

Claims (2)

  A plurality of LED chips, a metal substrate that supports the plurality of LED chips, a light source device that includes a support member that disposes a plurality of the metal substrates, a power supply device that drives the light source device, the power supply device, and the An illumination device for a tunnel configured by a housing to which a light source device is attached, wherein the support member is made of a metal plate formed in a convex shape in a sectional view, and is in contact with and connected to the back surface of the metal substrate. In addition, a heat sink made of a metal plate formed in a convex shape in a sectional view is attached to the back surface of the support member in thermal contact, and the heat sink and the housing are connected in thermal contact. LED lighting heat dissipation structure for tunnel.   2. The LED illumination heat dissipation structure for a tunnel according to claim 1, wherein the support member, the heat sink, and the housing are in thermal contact with an adhesive sheet having thermal conductivity made of silicone resin or the like.

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