JPH02144807A - Lighting device - Google Patents

Abstract

PURPOSE:To radiate heat in a lightening device body to the outside of heat insulating material to prevent a drop of the device efficiency for ensuring heat radiation by installing a heat radiating cylinder through which heat insulating material is provided in a projecting condition at the back of the body. CONSTITUTION:This lighting device 10 is installed covered with heat insulating material 21, and made up such that a heat radiating cylinder 22 having a length which can penetrate the heat insulating material 21 is installed projected to a device body 15 in such a condition that the heat radiating cylinder 22 is opened within the body 15. The heat of a stabilizer 12 is, therefore, radiated to the outside of the heat insulating material 21 passing through the heat radiating cylinder 22. Further, the heat of a lamp 16 is also radiated from the heat radiating cylinder 22 through the air vent 20 of a reflecting plate 13. Thereby, the inside of the equipment body 15 is not filled with heat and it is possible to hold down the temperature of the stabilizer and various types of electric parts such as a socket, etc. to a minimum and also prevent a drop of the equipment efficiency, e.g., a short life, etc. and also the lamp flux can be increased as the temperature of the lamp 16 can be held down to a minimum.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ceiling-embedded lighting fixture.

[Conventional technology]

Traditionally, insulation material has been placed under the ceiling to keep the interior warm. When lighting fixtures are buried in the ceiling, a heat insulating material is placed over the lighting fixtures, which reduces the heat dissipation efficiency of the lighting fixtures.

Therefore, as shown in FIG. 6, a stabilizer 72 is screwed onto the appliance body 70 via a heat radiating member 71, so that the heat of the stabilizer 72 is released into the internal space of the appliance body 70. Alternatively, as shown in FIG. 7, the ballast 72 is screwed to the instrument body 70 via the corrugated plate 73, and the heat of the ballast 72 is transferred to the corrugated plate 73.
The water is released to the instrument main body 70 via.

[Problem to be solved by the invention]

However, in this way, the lamp and socket were radiating heat to the appliance body 70 and its internal space.

This had a negative impact on various electrical components such as terminal blocks, lead wires, and batteries, resulting in reduced lamp luminous flux and shortened lifespan, resulting in decreased equipment efficiency.

Therefore, an object of the present invention is to provide a lighting fixture that can reliably dissipate heat without reducing the efficiency of the fixture.

[Means to solve the problem]

The lighting fixture of the present invention is installed covered with a heat insulating material, and has a heat dissipation tube having a length that passes through the heat insulating material and protrudes from the fixture body with an opening inside the fixture body.

[For production]

According to the lighting device of the present invention, since the heat dissipation tube that penetrates the heat insulating material is provided on the device body, the heat inside the device body is radiated to the outside of the heat insulating material through the heat dissipation tube, resulting in a decrease in the efficiency of the device. Reliable heat dissipation is possible without causing any damage.

(Embodiment) An embodiment of the present invention will be described based on FIGS. 1 to 3.

In FIGS. 1 and 2, 10 is a lighting fixture;
It is buried in the ceiling 11. The lighting fixture 10 includes a ballast 1
25 Reflector 13. Appliance body 15 provided with socket 14 etc.
and a lamp 16. Note that, as shown in FIG. 3, a rising portion 19 is formed on the reflecting plate 13, and a ventilation hole 20 is provided in this rising portion 19.

The appliance main body 15 is suspended from a ceiling slab 17 with hanging bolts 18. Further, 21 is a heat insulating material 21 made of glass wool or the like spread on the upper surface of the ceiling 11, and is spread to cover the appliance main body 15. Further, on the upper surface 23 of the appliance main body 15, two heat radiation tubes 2 having a length penetrating the heat insulating material 21 are provided.
2 is provided protrudingly. The heat dissipation cylinder 22 is provided with a lower end formed with a flange 24 fixed to the inner surface of the instrument main body 15 so as to protrude.

According to the lighting fixture configured in this manner, the heat radiated from the ballast 12 is radiated to the outer surface of the heat insulating material 21 through the heat radiating cylinder 22. Furthermore, the heat of the lamp 16 also passes through the ventilation hole 20 of the reflection plate 13 and is radiated from the heat radiation cylinder 22. Therefore, heat does not accumulate inside the appliance main body 15, and the temperature of the ballast itself and various electrical components such as the socket can be kept low, and a decrease in appliance efficiency such as a shortened life can be prevented. Furthermore, the temperature of the lamp 16 can also be kept low, increasing the lamp luminous flux.

Further, since the ventilation hole 20 of the reflection plate 13 is formed in the rising portion 19 of the reflection ui 13, reduction in reflected light due to the ventilation hole 20 can be prevented.

Furthermore, indoor air can also be exhausted to the ceiling through the ventilation holes 20 and the heat sink 22.

Other embodiments of the invention are shown in FIGS. 4 and 5.
In the figures, the same parts as in the examples shown in FIGS. 1 to 3 are given the same reference numerals and their explanations are omitted. In the figures, 30 is a heat radiation tube, which has a length that can penetrate the heat insulating material 21. The lower end, on which the flange 31 is formed, is inserted into the interior of the instrument body 15 and is rotatably protruded from the upper surface 23 of the instrument body 15. A screw hole 33 is formed in the center of the upper surface of the heat radiation tube 30, and a hanging bolt 32 whose upper end is fixed to the ceiling slab 17 is screwed into this screw hole 33 by rotating the heat radiation tube 30, and the lighting fixture 10 is attached. to hang. Further, a plurality of heat radiation holes 34 are formed around the threaded hole 33 on the top surface of the heat radiation cylinder 30, and the heat inside the appliance main body 15 passes through the heat radiation cylinder 30 and is transferred from the heat radiation holes 34 to the heat insulating material 21. Heat is radiated to the outside. Further, although the reflector plate 35 of the instrument body 15 is flat and has no ventilation holes, the gap between the reflector plate 35 and the instrument body 15 serves as a ventilation path. Note that a reflecting plate 13 as shown in FIG. 3 may be used.

Even in the lighting fixture configured in this way, the same effects as in the first embodiment can be obtained.

Note that each of the above embodiments is a ceiling-embedded lighting fixture,
Although the heat radiation tube 2230 was provided protruding from f123 of the fixture main body 15, it may be a lighting device installed on a wall surface or the like, and a heat radiation tube may be provided horizontally protruding from the back surface of the lighting device.

〔Effect of the invention〕

According to the lighting device of the present invention, a heat radiation tube that penetrates the heat insulating material is provided on the back of the device body, so that the heat inside the device body is radiated to the outside of the heat insulating material through this heat radiation tube, which improves the efficiency of the device. The effect is that reliable heat dissipation can be performed without causing any deterioration.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is also a sectional view thereof, FIG. 3 is a partial perspective view of the reflector, and FIG. Figure 5 is a partial perspective view.
FIG. 6 is a partially exploded perspective view of a conventional example, and FIG. 7 is a partially exploded perspective view of another conventional example. lO...Lighting equipment, 15... Fixture body, 21...
Insulation material, 22.30...heat radiation tube

Claims (1)

[Claims] 1. A lighting fixture installed covered with a heat insulating material, characterized in that a heat dissipation tube having a length that penetrates the heat insulating material is opened in the fixture body and protrudes from the fixture body. .