JPH09293411A - Built-in lighting equipment for heat insulating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve radiation by a radiating fin and miniaturize an equipment main unit and prevent dusts from being easily deposited between the radiating fins. SOLUTION: In a built-in lighting equipment for heat insulated mounting of an equipment main unit 2, housing a lamp 6 in the inside and providing a permeation opening 2a in a lower surface, buried in a burying hole provided in a ceiling for heat insulation in the ceiling by a sheet-shaped heat insulating material 7 a plurality of radiating fins 8 are vertically provided in an upper surface of the equipment main unit 2 so as to be mutually almost in parallel in a vertical direction. Further, in an upper end of this radiating fin 8, a heat insulating material mounting plate 9 is provided, which has a size covering at least an upper side of the radiating fin 8 to mount the sheet-shaped heat insulating material 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embedded luminaire for heat insulation construction, and more particularly to an embedded luminaire for heat insulation construction which is embedded and attached to a ceiling where the ceiling is heat insulated.

[0002]

2. Description of the Related Art FIG. 6 and FIG. 7 show a conventional embedded luminaire for heat insulation construction. This embedded luminaire for heat insulation construction is a downlight embedded and mounted in a ceiling 1. The instrument main body 2, the socket 3, the mounting bracket 4, and the push-up bar 5 are provided.

The instrument body 2 has a substantially cylindrical shape with a light-transmitting opening 2a on the lower surface and a closed upper surface. Inside thereof, a socket 3 for mounting the lamp 6 downward is attached to the upper surface. ing. Also, on the side wall, the instrument body 2
There are provided a plurality of mounting brackets 4 for mounting the unit 1 on the ceiling 1 and a plurality of push-up bars 5 that are capable of protruding above the upper surface of the instrument body 2.

The downlight thus constructed is attached to the ceiling 1, which is heat-insulated by laying a sheet-like heat insulating material 7 on the back of the ceiling, with an embedding hole 1a provided. As shown, by making the plurality of push-up bars 5 project above the upper surface of the device body 2, the sheet-shaped heat insulating material 7 located on the upper surface side of the device body 2 can be pushed up.

[0005]

However, in the conventional embedded lighting fixture for heat insulation construction thus configured, by pushing up the push-up bar 5 and projecting it upward from the upper surface of the fixture body 2, Although a space can be secured between the instrument body 2 and the sheet-shaped heat insulating material 7, the heat radiation area of the instrument body 2 on the ceiling backside is limited to the side wall and the upper surface of the instrument body 2, and heat radiation due to convection can be expected much. In the case of heat-insulated ceilings, the heat dissipation area cannot be sufficiently secured, and the heat dissipation is poor.

[0006] Generally, in recent years, there has been a demand for downsizing of lighting fixtures, and downsizing as described above is also strongly desired. However, simply reducing the size of the device is not easy because the temperature inside the device body 2 and the outer temperature of the device body 2 rise and cause various problems.

By the way, as shown in FIG. 8 in the past, in the projector, in order to dissipate heat from the fixture body 2, the fixture body 2
It is known that a plurality of radiating fins 8 are provided upright on the outer surface of the above so as to be substantially parallel to each other.

Therefore, as shown in FIG. 9, it is conceivable to apply the heat radiation fin 8 to a conventional embedded lighting fixture for heat insulation construction to secure a heat radiation area. In the case where the sheet-shaped heat insulating material 7 is mounted on the ceiling where heat radiation due to convection cannot be expected so much, the contact area between the heat radiation fin 8 which is a heat radiation path by conduction and the sheet heat insulating material 7 is small, and the sheet heat insulating material 7 is placed between the heat radiation fins 8. There is a risk that the heat radiation will decrease due to the entry of the air layer and that the construction wiring such as the power supply line will fall between the radiation fins and touch the upper surface of the fixture body 2 where the temperature is relatively high. Therefore, there is a problem that dust or the like is likely to be accumulated on the upper surface of the instrument body 2 where the temperature becomes relatively high.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the heat radiation performance by the heat radiation fins to reduce the size of the main body of the device and to prevent dust from accumulating between the heat radiation fins. An object is to provide an embedded lighting fixture for heat insulation construction.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a lamp 6 inside and a translucent opening 2a on the lower surface. In the embedded luminaire for heat insulation construction, in which the fixture body 2 is embedded and installed in an embedding hole provided in the ceiling where the back of the ceiling is heat-insulated by the sheet-like heat insulating material 7, in the vertical direction on the upper surface of the fixture body 2. A plurality of heat radiating fins 8 are provided upright on the sheet heat insulating member 7, and the heat radiating fins 8 have a size that covers at least the upper side of the heat radiating fins 8 at the upper ends thereof.
The heat insulating material mounting plate 9 on which the is mounted is provided.

According to the invention of claim 2, claim 1
The embedded luminaire for heat insulation construction according to claim 1, wherein the plurality of heat dissipating fins 8 are substantially parallel to each other, and the heat dissipating fins 8 at the both ends are arranged so that the surfaces abutting the upper ends thereof have a substantially roof shape. The projection margin is gradually reduced toward the top, and the heat insulating material mounting plate 9 having a substantially roof shape is provided at the upper end thereof.

According to a third aspect of the present invention, in the embedded luminaire for heat insulation construction according to the first aspect or the second aspect, the heat insulating material mounting plate 9 includes the plurality of heat radiation fins 8. It is characterized in that it is provided integrally with the radiation fin 8 so as to connect the upper ends.

According to a fourth aspect of the present invention, in the embedded lighting fixture for heat insulation construction according to one of the first to third aspects, the lamp is provided inside the main body 2 of the fixture. A reflecting mirror 10 which substantially covers the upper surface side of 6 and is arranged with a gap 2e between it and the instrument body 2 is accommodated, and the upper surface of the instrument body 2 is penetrated from the inside of the instrument body 2 to the outside. The air circulation hole 2b is provided.

[0014] According to the fifth aspect of the present invention, the fourth aspect is provided.
The embedded lighting fixture for heat insulation construction described above is characterized in that a through hole 10a is provided in an upper portion of the reflecting mirror 10.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of an embedded lighting fixture for heat insulation construction according to the present invention. A downlight that is embedded in a ceiling and is heat-insulated by a heat insulating material 7. The downlight mainly includes an instrument body 2, a socket 3, a heat insulating material mounting plate 9, and a reflecting mirror 10. ing.

The instrument main body 2 is made of metal having excellent heat conductivity, for example, die-casting of aluminum or the like,
A substantially bowl-shaped lamp accommodating space 2d is provided inside a substantially cylindrical lower main body 2c in which the upper side is closed and a light-transmitting opening 2a is provided at the lower side, and an upper side of the lower main body 2c forming the lamp accommodating space 2d is provided. On the outer surface, a plurality of heat radiation fins 8 are vertically arranged in an upright manner so as to be substantially parallel to each other. In addition, the lamp housing space 2 inside the fixture body 2
At d, a socket 3 for mounting the lamp 6 and a reflecting mirror 10 are arranged. Here, the plurality of heat radiation fins 8 may be formed to have a radial shape in a plan view.

The reflecting mirror 10 includes a lamp 6 and a light-transmitting opening 2.
It has a substantially bowl-like shape that substantially covers except the a side, and is attached to the instrument body 2 by a tapping screw 11 or the like so as to abut the inner wall of the instrument body 2. Also, the instrument body 2
On the outer surface of the lower main body 2c side, for example, a long spring-like mounting metal fitting 12 for mounting the appliance main body 2 in the embedded hole in the ceiling is screwed and attached at three positions in the circumferential direction. A frame-shaped portion 2f having an outer brim and abutting against the lower surface of the ceiling is integrally formed at the peripheral end of the translucent opening 2a of the lower body 2c.

Further, the heat insulating material mounting plate 9 is a plate-like member having a size that abuts on the upper ends of the plurality of heat radiation fins 8 and covers the plurality of heat radiation fins 8. It is made of a certain material such as aluminum, and is disposed so that the peripheral ends thereof project laterally beyond the ends of the heat radiation fins 8 so as to cover at least the upper ends of the plurality of heat radiation fins 8.

In the embedded lighting fixture for heat insulation construction thus constructed, the heat radiation path on the upper surface side of the fixture main body 2 is such that the air layer 8 between the upper surface of the lower main body 2c of the fixture main body 2 and the radiation fins 8 is provided.
that is transmitted to the heat insulating material mounting plate 9 through a and is radiated to the sheet-shaped heat insulating material 7 side, and the heat radiation fins 8 from the upper surface of the lower body 2c.
There is a path through which the heat is dissipated to the heat insulating material mounting plate 9 and is radiated to the sheet heat insulating material 7 side. And, generally, the thermal conductivity of metal and air is about 0.0257 (W / mK),
Thermal conductivity of metal (aluminum) 206 (W / m
Since it is much inferior to that of K), a plurality of heat dissipation fins 8 are provided as the latter path and the area of the heat insulating material mounting plate 9 is increased to dissipate the heat inside the instrument main body 2 by conduction to dissipate the heat dissipation fins. The temperature of the outer shell of the instrument body 2 including 8 is averaged.

With this configuration, in the embedded luminaire for heat insulation construction according to the present embodiment, the heat inside the luminaire main body 2 is more heat-conductive than the air layer 8a on the upper surface side. The heat-dissipating fins 8 are excellently transmitted to the heat-insulating-material mounting plate 9 and are efficiently radiated to the sheet-shaped heat-insulating material 7. For this reason, even in the case of the ceiling behind which the heat insulation by the sheet-shaped heat insulating material 7 where heat radiation due to convection cannot be expected,
It is possible to secure a heat radiation area capable of radiating heat by direct conduction, improve heat radiation performance, reduce the temperature inside the instrument body 2, and average the outer temperature to lower the outer temperature of the instrument as a whole. it can. Further, since the heat insulating material placing plate 9 is provided on the upper ends of the heat radiating fins 8, the sheet-shaped heat insulating material 7 enters between the heat radiating fins 8 to narrow the air layer 8 a, and dust between the heat radiating fins 8 and the like. Will not be deposited.

FIG. 2 shows a second embodiment of the embedded luminaire for heat insulation construction according to the present invention. The difference from the first embodiment is that a plurality of heat radiation fins 8 are provided. Radiating fin 8 in the center so that the surface that abuts on the upper end has a substantially roof shape
Is provided on the uppermost side, and the protruding margin is gradually reduced toward both ends, and is substantially roof-shaped so that it abuts on the upper ends of the plurality of heat radiation fins 8, that is, a flat plate is bent at substantially the center. The heat insulating material mounting plate 9 is provided, and the other configurations are similar to those of the first embodiment.

Even with this structure, the same effect as that of the first embodiment can be obtained, and since the heat insulating material mounting plate 9 contacting the heat radiation fins 8 is formed in a substantially roof shape, a sheet-shaped heat insulating material is formed. The surface area of the heat insulating material mounting plate 9 which is the heat radiation area to the material 7 side can be increased, and the adhesiveness with the sheet-shaped heat insulating material 7 is increased to increase the contact area and further improve the heat radiation performance.

FIG. 3 shows a third embodiment of the embedded luminaire for heat insulating construction according to the present invention. The difference from the first embodiment is that the heat insulating material mounting plate 9 is The radiating fins 8 are integrally formed on the upper ends of the radiating fins 8 so that they are connected to each other, and the other configurations are similar to those of the first embodiment.

Even with this structure, the same effect as that of the first embodiment can be obtained, and since the radiation fin 8 and the heat insulating material mounting plate 9 are integrated, the thermal conductivity between them is high. Is improved, and heat dissipation is further improved.

FIG. 4 shows a fourth embodiment of the embedded luminaire for heat insulating construction according to the present invention. The difference from the first embodiment is that the lower main body 2c of the main body 2 of the equipment is different. An air circulation hole 2b for communicating the lamp housing space 2d with the air layer 8a between the heat radiation fins 8 is provided, and the spacer 13 is provided between the reflection mirror 10 and the inner wall of the fixture body 2 so as not to directly contact them. The point is that the gap 2e is provided by attaching via the above, etc., and otherwise the configuration is similar to that of the first embodiment.

Even with this structure, substantially the same effect as that of the first embodiment can be obtained, and in the gap 2e between the reflecting mirror 10 and the instrument body 2, the transparent opening 2a side of the instrument body 2 is provided. The outside air is taken in from and the heat on the back surface side of the reflecting mirror 10 can be radiated, and the temperature inside the instrument body 2 can be reduced.

FIG. 5 shows a fifth embodiment of the embedded luminaire for heat insulating construction according to the present invention. The difference from the fourth embodiment is that the upper surface side of the reflecting mirror 10 is The point is that a plurality of through holes 10a are provided, and the other points are configured similarly to the fourth embodiment.

Even with this structure, the same effect as that of the fourth embodiment is obtained, and the air heated by the lamp 6 inside the instrument body 2 is passed through the through hole 10a and the air circulation hole 2b. Because it can escape to the upper side,
It is possible to lower the internal temperature of the instrument body 2 including the temperature of the electric wire connecting portion of the socket 3 and the sealing portion of the lamp 6 and prevent the deterioration thereof.

In each of the above-described embodiments, the socket 3 for mounting the lamp 6 is attached to the instrument body 2, but the attachment may be directly attached to the instrument body 2 or a socket base. It may be of any type such as one attached via another component. Further, in each of the above-described embodiments, an example in which the mounting bracket 12 has a long spring shape and is screwed to the side surface of the instrument body 2 has been illustrated, but the present invention is not limited to this, and is provided on the outer surface of the instrument body. A groove-shaped engagement groove is formed and the mounting metal fitting 12 is inserted and mounted, or a mounting metal fitting 12 that is short and is attached to the same engagement groove so as to face obliquely downward is vertically slid. It may be a movably attached one.

[0030]

As described above, according to the present invention, the heat inside the instrument main body is superior in heat conductivity to the air layer on the upper surface side. Efficiently transmitted from the multiple radiation fins to the heat insulation material mounting plate,
Heat is radiated to the sheet-shaped heat insulating material side. For this reason, even in the case of an attic that has been heat-insulated with a sheet-shaped heat insulating material where heat dissipation due to convection cannot be expected so much, it is possible to secure a heat dissipation area that can dissipate heat by conduction, and improve heat dissipation performance. The temperature can be reduced, and the temperature of the outer shell can be averaged to lower the outer shell temperature of the device as a whole, so that the device can be downsized. Further, since the heat insulating material mounting plate is provided on the upper ends of the heat radiating fins, a sheet-shaped heat insulating material does not enter between the heat radiating fins to narrow the air layer, and dust or the like does not accumulate between the heat radiating fins. .

In the invention according to claim 2, claim 1 is
In addition to the effects of the invention described, since the heat insulating material mounting plate that abuts the heat radiation fins is formed in a substantially roof shape, it is possible to increase the surface area of the heat insulating material mounting plate, which is the heat radiation area to the sheet-shaped heat insulating material side. The adhesiveness with the sheet-shaped heat insulating material is increased, the contact area is increased, and the heat dissipation is further improved.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, since the radiation fin and the heat insulating material mounting plate are integrated, The thermal conductivity is improved, and the heat dissipation is further improved.

According to the invention of claim 4, in addition to the effect of the invention of one of claims 1 to 3, in addition to the effect of the invention of claim 1, in the gap between the reflecting mirror and the instrument body, the instrument body The outside air is taken in from the translucent opening side, and heat can be radiated from the back surface side of the reflecting mirror.

According to the invention of claim 5, claim 4
In addition to the effects of the invention described, the air heated by the lamp inside the device body can be released to the upper side through the through hole and the air circulation hole, so that the temperature inside the device body is lowered and the deterioration of the socket etc. Can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic view showing a cross-sectional state of a first embodiment of an embedded lighting fixture for heat insulation construction of the present invention.

FIG. 2 is a schematic view showing a cross-sectional state of the second embodiment of the embedded lighting fixture for heat insulation construction of the present invention.

FIG. 3 is a schematic view showing a cross-sectional state of a third embodiment of the embedded lighting fixture for heat insulation construction of the present invention.

FIG. 4 is a schematic view showing a cross-sectional state of a fourth embodiment of the embedded lighting fixture for heat insulation construction of the present invention.

FIG. 5 is a schematic diagram showing a cross-sectional state of a fifth embodiment of the embedded luminaire for heat insulation construction of the present invention.

FIG. 6 is a cross-sectional view showing a construction state of a conventional embedded lighting fixture for heat insulation construction.

FIG. 7 is a cross-sectional view showing a different construction state of the above.

FIG. 8 is a cross-sectional view showing a conventional light projector provided with a radiation fin.

FIG. 9 is a schematic diagram showing a state in which a radiation fin is provided in a conventional embedded lighting fixture for heat insulation construction.

[Explanation of symbols]

 2 Instrument main body 2a Light-transmitting opening 2b Air circulation hole 2e Gap 6 Lamp 7 Sheet-like heat insulating material 8 Radiating fins 9 Heat insulating material mounting plate 10 Reflecting mirror 10a Through hole

Claims (5)

[Claims] 1. A fixture main body having a lamp housed therein and having a translucent opening on the lower surface is embedded and mounted in an embedding hole provided in a ceiling where the back of the ceiling is heat-insulated with a sheet-shaped heat insulating material. In the embedded lighting fixture for heat insulation construction, a plurality of heat radiation fins are provided upright on the upper surface of the fixture body, and at the upper end of the heat radiation fin, at least a size that covers the upper side of the heat radiation fin is provided. An embedded lighting fixture for heat insulation construction, comprising a heat insulating material mounting plate on which a sheet-shaped heat insulating material is mounted. 2. The plurality of radiating fins are formed so that a protruding margin is gradually reduced from the central radiating fin toward the radiating fins at both ends so that surfaces of the plurality of radiating fins which are substantially parallel to each other and which abut against the upper end have a substantially roof shape. 2. The embedded luminaire for heat insulating construction according to claim 1, wherein the heat insulating material placing plate having a substantially roof shape is provided on an upper end thereof. 3. The heat insulating work according to claim 1, wherein the heat insulating material mounting plate is provided integrally with the heat radiating fins so as to connect the upper ends of the plurality of heat radiating fins. Recessed lighting fixture. 4. A reflecting mirror, which substantially covers the upper surface side of the lamp and is arranged with a gap between it and the instrument body, is housed inside the instrument body, and at the same time, on the upper surface of the instrument body,
An air circulation hole penetrating from the inside to the outside of the instrument body is provided, and one of claims 1 to 3 is characterized.
An embedded luminaire for heat insulation construction according to one of the claims. 5. The embedded luminaire for heat insulation construction according to claim 4, wherein a through hole is provided in an upper portion of the reflecting mirror.