JP2001185867A - Heat radiating duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat radiating duct constituted to suppress dust from intruding into the interior. SOLUTION: Heating components such as fluorescent lamps are housed in the interior of a flat plate part 11 of a metal plate or resin plate, cut erected pieces 12 are formed on the flat plate part 11, and the top ends 12a of the cut pieces 12 project forwards over the peripheral edges 13a of the openings 13 to discharge heat from the openings 13. The top ends 12a of the cut pieces 12 are disposed and superposed on regions contacting the openings 13 and hence dust hardly intrudes through the openings 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-radiating duct for use in lighting equipment and the like, which is configured to suppress intrusion of dust into the inside.

[0002]

2. Description of the Related Art As indoor lighting equipment, there is known an embedded lighting equipment in which a lighting equipment is mounted in a ceiling. Such a recessed lighting device has the advantage that the lighting device does not protrude from the ceiling surface, so that even if the lighting device is mounted on the ceiling, the space is widened and there is no feeling of oppression. The recessed lighting fixture is fixed to the ceiling by fixing members such as bolts and nuts on an appropriate support.

FIG. 7 is a perspective view showing an example of a main body case used for a recessed type lighting apparatus. In FIG. 1, an inner surface of a reflector 10 is formed of a reflecting member, and a predetermined number of fluorescent tubes are attached thereto. The reflector 10 is formed of a metal plate or a synthetic resin plate. 10p is a mounting hole for inserting a bolt fixed to the support.

[0004] When the fluorescent tube attached to the inner surface of the reflector 10 is energized and emits light, the ambient temperature rises. Therefore, a predetermined number of heat radiation ducts are formed at appropriate positions on the side surfaces 10a to 10d and the upper surface 10e of the reflector 10.

FIG. 8 is a sectional view of such a heat-dissipating duct, FIG. 9 is a side view seen from the direction of arrow A in FIG.
FIG. 9 is an enlarged view of FIG. 8 to 10, an opening 13 is provided by forming a cut-and-raised piece 12 in a flat plate portion 11. The cut-and-raised piece 12 is cut and raised from the flat plate portion 11 in an arc shape.

When a metal plate is used as the reflector 10, the cut and raised piece 12 is formed by sheet metal working.
When a synthetic resin plate is used as the reflector 10, the protrusion 12 can be formed by molding.

[0007]

As shown in an enlarged view in FIG. 10, the tip 12a of the cut-and-raised piece 12 in the conventional configuration is shown.
And the peripheral portion 13a of the opening 13 are formed at substantially the same position in the vertical direction. For this reason, there is a problem that impurities such as dust easily enter through the opening 13, and the impurities adhere to the reflecting member and the fluorescent tube in the reflector 10, and the illumination effect is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a heat radiation duct configured to suppress intrusion of dust into the inside.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat-radiating duct in which an opening is formed by cutting and raising a heat-radiating duct from a plate-like member accommodating a heat-generating component. And a heat-dissipating duct that exhausts heat from the opening, which is achieved by a configuration in which the tip of the cut-and-raised piece protrudes forward from the periphery of the opening.

According to a second aspect of the present invention, the heat-radiating duct is formed in a plate-like member for accommodating a heat-generating component therein with a groove protruding in a convex shape. An opening is provided in the side wall, and heat is exhausted from the opening.

According to a third aspect of the present invention, in the heat radiation duct according to the first or second aspect, the heat-generating component is an electronic component.

According to a fourth aspect of the present invention, in the heat radiation duct according to the first or second aspect, the heat-generating component is a fluorescent tube.

According to a fourth aspect of the present invention, in the heat-radiating duct according to the first or second aspect, the heat-generating component has a structure in which terminals on both sides of the fluorescent tube are inserted into one socket. It is a compact fluorescent lamp.

According to the above feature of the invention according to claim 1,
The tip of the cut-and-raised piece projects forward from the periphery of the opening. That is, the cut-and-raised piece is formed so as to overlap the portion of the flat plate portion that is in contact with the opening. For this reason, the opening is increased in the rate of being shielded by the cut-and-raised pieces, so that intrusion of impurities such as dust can be suppressed.

According to the above feature of the invention according to claim 2,
Since the opening is provided on the side wall of the groove protruding in a convex shape,
Intrusion of dust from the flat surface direction of the protruded groove can be prevented.

According to the above feature of the invention according to claim 3,
The opening is provided in a flat plate portion of a case or the like in which an electronic component is housed to suppress intrusion of dust. Therefore, it is possible to effectively radiate the heat generated from the electronic component and to suppress the intrusion of the dust, thereby preventing the failure of the electronic component due to the adhesion of the dust.

According to the above feature of the invention according to claim 4,
The opening is provided in a flat plate portion of a main body case or the like in which a fluorescent tube is housed to suppress intrusion of dust. For this reason,
It is possible to prevent a decrease in illuminance due to dust adhering to the fluorescent tube and the reflector.

According to the above feature of the invention according to claim 5,
The opening is provided in a flat plate portion of a main body case or the like in which a compact fluorescent lamp of a type in which terminals on both sides of a fluorescent tube are inserted into one socket is provided to suppress intrusion of dust. For this reason, it is possible to prevent a decrease in illuminance when a compact fluorescent lamp is used.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an example of the heat radiation duct according to the embodiment of the present invention. The same reference numerals as those in the conventional example described in FIG. 8 and FIG. 10 denote the same parts, and a detailed description thereof will be omitted. In FIG. 1, the heat radiation duct 20 is configured such that a tip 12 a of the cut and raised piece 12 is
Projecting forward.

That is, the tip 1 of the cut and raised piece 12
2a is a peripheral edge 13a of the opening 13, that is, the flat plate portion 1;
It is formed so as to overlap on a portion in contact with one of the openings 13. For this reason, the ratio of the opening 13 being blocked by the cut-and-raised pieces 12 is increased, so that the intrusion of impurities such as dust from the opening 13 is suppressed.

As shown in FIG. 1, the tip 1 of the cut-and-raised piece 12
In order to arrange the 2a outside the peripheral edge 13a of the opening 13, it can be realized by plastically deforming the cut-and-raised piece 12 by pulling when a metal plate is used as the main body case 10. When a synthetic resin plate is used as the main body case 10, the cut-and-raised pieces 12 as shown in FIG. 1 can be formed by mold molding.

FIG. 2 is a sectional view showing a heat radiation duct 30 according to another embodiment of the present invention. In FIG. 2, the cut-and-raised piece 14 is formed by bending a cut-and-raised piece standing upright from the opening 13 in the horizontal direction so as to have a hook shape. The cut-and-raised piece 14 having such a shape can also be formed by sheet metal processing.

FIG. 3 is a sectional view showing a heat radiation duct 40 according to still another embodiment of the present invention. In FIG. 3, the protruding portion 15 is formed by pressing the flat plate portion 11 so as to protrude a groove in a convex shape by press working. Next, the openings 15a and 15b are formed by cutting out the side walls on both sides. In the heat radiation duct of FIG. 3, heat is exhausted from the openings 15a and 15b. The openings 15a and 15b are formed in a direction orthogonal to the flat surface 15x of the protruding portion 15, so that dust can be prevented from entering from the flat surface 15x direction.

FIG. 4 is a perspective view showing an example in which the heat radiation duct described with reference to FIG. 1 is provided on a reflector of a lighting fixture. In the reflector 10, the same parts as those in the example described with reference to FIG.

In the example of FIG. 4, the radiation duct 20 is provided on the side surfaces 10a and 10b of the reflector 10, but the position of the radiation duct 20 is appropriately determined in consideration of the mounting position of the fluorescent tube socket and the like. Is selected. A heat radiation duct 20 may be provided on the upper surface of the reflector 10.

The number of the heat radiation ducts 20 is arbitrarily selected in consideration of the heat radiation effect and the production cost. In addition, although the arrangement of the heat radiation ducts 20 is formed in a state of being arranged in two rows in the example of FIG. 4, they can be arranged at random.

FIG. 5 shows the heat radiation duct 20 described with reference to FIG.
FIG. 9 is an exploded perspective view showing an example in which a light source is provided on a reflector of a lighting fixture according to another embodiment. The lighting fixture 1 of FIG. 5 has an inverter case 2 attached to a reflector 1x having an inner surface formed of a reflecting member.

The reflector 1x is provided with openings 1a and 1b through which sockets are inserted, openings 1c through which terminal blocks are inserted, and openings 1d through which bolts fixed to supports are inserted. On the side surface of the reflector 1x, a plurality of heat radiation ducts 20 described with reference to FIG. 1 are provided. Reference numeral 8 denotes a louver fitted to the front surface of the reflector 1x.

The inverter case 2 accommodates a plurality of inverters formed by various electronic components 5 mounted on a printed circuit board and sockets on a socket base 3x formed by folding back from one side wall. 3a, 3b and sockets 3c, 3d are juxtaposed and fixed. Further, the terminal block 4 and the wiring 6 are arranged. Reference numerals 7a to 7d denote screw holes for screws used when attaching the inverter case 2 to the reflector 1x.

FIG. 6 shows an inverter case 2 on the reflector 1x.
FIG. 1 is a perspective view showing an example in which a lighting device 1 is configured by attaching a lighting device. The size of the mounting surface of the inverter case 2 is less than half the size of the surface of the reflector 1x. A fluorescent tube is inserted into each of the sockets 3a to 3d to form a compact fluorescent lamp. Here, the compact fluorescent lamp is a type in which, for example, a U-shaped fluorescent tube is inserted into each of the sockets 13a to 13d, that is, a type in which terminals (pins) on both sides of the fluorescent tube are inserted into one socket. Lighting equipment.

The bolt attached to the support is attached to the body case 1
x and is fixed with a nut. FIG.
In the luminaire of (1), the inverter case 2 is downsized, and as described above, the size of the mounting surface is smaller than half the size of the surface of the reflector 1x.

For this reason, conventionally, components such as an inverter unit are housed in a main body case and mounted on the upper surface of the reflector 10, so that the position where the heat radiation duct is formed on the upper surface of the reflector is restricted. However, the lighting fixture of FIG.
Since nothing is placed on the upper half surface of the “0”, the degree of freedom in the position where the heat radiation duct 20 is provided on the upper surface can be increased.

Therefore, the exhaust heat in the high temperature region formed above the reflector 1x can be effectively performed by the convection action. Further, since no heat-dissipating duct is provided on the side surface of the reflector 1x, the appearance of the lighting fixture is not impaired.

In the above description, the heat radiation duct is provided on the reflector of the lighting equipment, but the heat radiation duct of the present invention is not limited to being provided on the reflector of the lighting equipment. The present invention can be generally applied to a case that accommodates components that generate heat. In particular, by providing the heat-radiating duct of the present invention in a case that accommodates electronic components therein, the heat generated from the electronic components can be effectively radiated and the intrusion of dust can be suppressed. A unique effect that the occurrence of a component failure can be prevented can be obtained.

[0035]

As described above, according to the above feature of the first aspect of the present invention, the tip of the cut-and-raised piece projects forward from the peripheral edge of the opening. That is, the cut-and-raised piece is formed so as to overlap the portion of the flat plate portion that is in contact with the opening. For this reason, the opening is increased in the rate of being shielded by the cut-and-raised pieces, so that intrusion of impurities such as dust can be suppressed.

According to the above feature of the invention according to claim 2,
Since the opening is provided on the side wall of the groove protruding in a convex shape,
Intrusion of dust from the flat surface direction of the protruded groove can be prevented.

According to the above feature of the invention according to claim 3,
The opening is provided in a flat plate portion of a case or the like in which an electronic component is housed to suppress intrusion of dust. Therefore, it is possible to effectively radiate the heat generated from the electronic component and to suppress the intrusion of the dust, thereby preventing the failure of the electronic component due to the adhesion of the dust.

According to the above feature of the invention according to claim 4,
The opening is provided in a flat plate portion of a main body case or the like in which a fluorescent tube is housed to suppress intrusion of dust. For this reason,
It is possible to prevent a decrease in illuminance due to dust adhering to the fluorescent tube and the reflector.

According to the above feature of the invention according to claim 5,
The opening is provided in a flat plate portion of a main body case or the like in which a compact fluorescent lamp of a type in which terminals on both sides of a fluorescent tube are inserted into one socket is provided to suppress intrusion of dust. For this reason, it is possible to prevent a decrease in illuminance when a compact fluorescent lamp is used.

[Brief description of the drawings]

FIG. 1 is a sectional view of a heat radiation duct according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a heat radiation duct according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view of a heat radiation duct according to another embodiment of the present invention.

FIG. 4 is a perspective view showing an example in which the heat radiation duct of the present invention is provided on a reflector of a lighting fixture.

FIG. 5 is a schematic exploded perspective view showing an example of a lighting fixture.

FIG. 6 is a schematic perspective view showing an example of a lighting fixture.

FIG. 7 is a schematic perspective view showing a reflector of the lighting fixture.

FIG. 8 is a cross-sectional view of a conventional heat radiation duct.

FIG. 9 is a side view as seen from the direction of arrow A in FIG. 8;

FIG. 10 is an enlarged view of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lighting fixture 1x, 10 Reflector 2 Inverter case 3a-3d Socket 4 Terminal block 5 Electronic component 6 Wiring 8 Louver 11 Flat plate part 12, 14 Cut-and-raised piece 13, 15a, 15b Opening part 15 Projection part 20 , 30, 40 Heat radiation duct

Claims (5)

[Claims] 1. A heat-dissipating duct for forming a cut-and-raised piece from a plate-like member accommodating a heat-generating component therein to provide an opening, and discharging heat from the opening, wherein a tip of the cut-and-raised piece is formed. A heat-dissipating duct, wherein the duct protrudes forward from a periphery of the opening. 2. A protruding groove is formed in a plate-like member for accommodating a component that generates heat therein, an opening is provided in a side wall of the protruding groove, and heat is exhausted from the opening. A heat-dissipating duct. 3. The heat radiation duct according to claim 1, wherein the heat-generating component is an electronic component. 4. The heat radiation duct according to claim 1, wherein the heat-generating component is a fluorescent tube. 5. The compact fluorescent lamp according to claim 1, wherein said heat-generating component is a type in which terminals on both sides of a fluorescent tube are inserted into one socket.
The heat-dissipating duct described in 1.