JP2009238513A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a luminaire capable of improving cooling efficiency. <P>SOLUTION: Since a heat radiation hole 25 is arranged in the vicinity of the most cooling part 24 of a fluorescent lamp 22 in a reflecting plate 23, light efficiency can be improved by cooling the most cooling part 24. Since a heat radiation part 27 is arranged so as to reach a reverse surface of the reflecting plate 23 via the heat radiation hole 25 by contacting with the most cooling part 24 of the fluorescent lamp 22, heat of the most cooling part 24 can be radiated to the reverse side of the reflecting plate 23 via the heat radiation part 27, and the light efficiency can be further improved by cooling the most cooling part 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lighting fixture using a fluorescent lamp.

Conventionally, lighting fixtures that can cool the heat generated by fluorescent lamps have been proposed (see, for example, Patent Document 1).
As shown in FIG. 4, a lighting fixture 100 described in Patent Document 1 has a fixture main body 102 embedded in a ceiling 106 that is an installation surface, and a fluorescent lamp 101 is attached inside the fixture main body 102. I have a hand. The instrument main body 102 is provided with a heat radiating opening 103, and inside the heat radiating opening 103, cooling means 104 having a heat radiating body 105 made of aluminum fins is provided.

Therefore, in this lighting fixture 100, since the heat generated from the fluorescent lamp 101 is released to the outside of the fixture main body 102 through the cooling means 104, the coolest part of the fluorescent lamp 101 is efficiently cooled, Light efficiency can be improved.
JP-A-11-191314 (FIG. 1)

  However, in the lighting fixture 100 described in Patent Document 1 described above, since the cooling has not been sufficiently performed, further improvement is desired.

  The present invention has been made to solve the conventional problems, and an object thereof is to provide a lighting fixture capable of improving the cooling efficiency.

  A lighting fixture according to the present invention includes a fixture main body mounted on a ceiling and having a fluorescent lamp disposed therein, and a reflector disposed on the fixture main body so as to be positioned above the fluorescent lamp. In the reflector, a heat radiating hole is provided in the vicinity of the coldest part of the fluorescent lamp, and heat is radiated to contact the coldest part of the fluorescent lamp and reach the back surface of the reflector through the heat radiating hole. It has the structure which provided the part.

  With this configuration, since the heat radiating hole is provided near the coldest portion of the fluorescent lamp in the reflector, the coldest portion can be cooled to improve the light efficiency. Moreover, since the heat radiating part is provided so as to contact the coldest part of the fluorescent lamp and reach the back surface of the reflecting plate through the heat radiating hole, the heat of the coldest part is radiated to the back side of the reflecting plate through the heat radiating part. In addition, the lightest part can be further cooled to improve the light efficiency.

  Moreover, the lighting fixture of this invention has the structure in which the said thermal radiation part has a thermal radiation fin in the back surface side of the said reflecting plate.

  With this configuration, the heat dissipating fins are provided in the heat dissipating part that contacts the coldest part and extends to the back side of the reflector, so that the heat of the coldest part can be efficiently dissipated to the back of the reflector via the heat dissipating part. Can do.

  Furthermore, the lighting fixture of this invention has the structure formed so that the said radiation fin may rectify | straighten the air which flows in into the back surface of the said reflecting plate from the said radiation hole.

  With this configuration, the heat radiation fins provided in the heat radiation part tend to cause an air flow that flows from the heat radiation hole to the back side of the reflector through the coldest part, so the heat of the coldest part is efficiently transferred to the back side of the reflector. It can dissipate heat.

  In the present invention, since the heat radiation hole is provided in the vicinity of the coldest portion of the fluorescent lamp in the reflection plate, the coldest portion can be cooled to improve the light efficiency. Moreover, since the heat radiating part is provided so as to contact the coldest part of the fluorescent lamp and reach the back surface of the reflecting plate through the heat radiating hole, the heat of the coldest part is radiated to the back side of the reflecting plate through the heat radiating part. Thus, it is possible to provide a lighting apparatus having an effect of further improving the light efficiency by cooling the coldest part.

Hereinafter, the lighting fixture of embodiment of this invention is demonstrated using drawing.
FIG. 1A is a partially broken perspective view of the lighting fixture according to the first embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along the line BB in FIG.

  As shown in FIG. 1, the lighting fixture 10 according to the first embodiment of the present invention is used by fitting a fixture main body 21 into an opening 11 a provided on a mounted surface such as a ceiling 11. A fluorescent lamp 22 is attached inside the instrument body 21, and a reflector 23 is provided above the fluorescent lamp 22. The reflection plate 23 has a horizontal portion 23a facing directly above the fluorescent lamp 22, and inclined portions 23b and 23b that reflect light from the fluorescent lamp 22 downward to the center, and both ends in the longitudinal direction of the horizontal portion 23a. Sockets 26, 26 for attaching and electrically connecting the fluorescent lamp 22 are attached to the section.

  A heat radiating hole 25 is provided in the vicinity of the coldest part 24 of the fluorescent lamp 22 in the horizontal part 23 a of the reflector 23, that is, near the center of the socket 24. Further, a heat radiating plate 27 that holds the fluorescent lamp 22 in contact with the coldest portion 24 is provided as a heat radiating portion.

  The heat radiating plate 27 passes through the heat radiating hole 25 and extends to the back surface of the reflecting plate 23, and a mounting portion 27 a at the upper end is attached to the top plate 21 a of the instrument main body 21. The heat radiating plate 27 is a metal spring member having good thermal conductivity and is urged in a direction in which the fluorescent lamp 22 is sandwiched. Further, the lower end portion 27c of the partial arc-shaped holding portion 27b that holds the coldest portion 24 of the fluorescent lamp 22 in the heat radiating plate 27 is open to both outer sides, and when the fluorescent lamp 22 is attached to the socket 26, the fluorescent lamp 22 can be easily attached to the heat sink 27.

  As described above, according to the luminaire 10 according to the first embodiment described above, since the heat radiation hole 25 is provided in the vicinity of the coldest portion 24 of the fluorescent lamp 22 in the reflector 23, the coldest portion 24 is cooled to obtain light efficiency. Can be improved. Further, since the heat radiating plate 27 is provided so as to contact the coldest portion 24 of the fluorescent lamp 22 and reach the back surface of the reflecting plate 23 through the heat radiating hole 25, the heat of the coldest portion 24 is radiated through the heat radiating plate 27. It is possible to dissipate heat to the back side of the reflecting plate 23 and further cool the coldest part 24 to improve the light efficiency. Furthermore, heat can be released to the instrument body 21 through the heat sink 27 by heat conduction.

Next, the lighting fixture 10B concerning 2nd Embodiment of this invention is demonstrated.
2A is a cross-sectional view of a lighting fixture according to the second embodiment of the present invention, and FIG. In addition, suppose that the same code | symbol is attached | subjected to the site | part common to the lighting fixture 10 concerning 1st Embodiment, and the overlapping description is abbreviate | omitted.

As shown in FIG. 2, in the luminaire 10B according to the second embodiment, the heat radiating plate 28, which is a heat radiating portion, extends through the heat radiating hole 25 to the back surface of the reflecting plate 23, and the upper mounting portion 28a is the luminaire. It is attached to the top plate 21 a of the main body 21. The heat radiating plate 28 is a metal spring member having good thermal conductivity and is urged in a direction in which the fluorescent lamp 22 is sandwiched. Further, the lower end portion 28c of the partial arc-shaped holding portion 28b that holds the coldest portion 24 of the fluorescent lamp 22 in the heat radiating plate 28 is open to both outer sides, and when the fluorescent lamp 22 is attached to the socket 26, the fluorescent lamp 22 can be easily attached to the heat sink 27.
Furthermore, a plurality of heat radiation fins 28c are provided in a portion of the heat radiation plate 28 located on the back surface side of the reflection plate 23 to increase the heat radiation area.

  By configuring in this way, the operation and effect of the first embodiment can be obtained, and since the radiation fins 28c are provided on the heat radiation plate 28 on the back surface side of the reflection plate 23, the coldest part 24 is provided. This heat can be efficiently radiated to the back side of the reflecting plate 23 via the heat radiating plate 28.

Next, a lighting fixture 10C according to a third embodiment of the present invention will be described.
FIG. 3A is a cross-sectional view of a lighting fixture according to the second embodiment of the present invention, and FIG. 3B is a perspective view of a heat sink. In addition, suppose that the same code | symbol is attached | subjected to the site | part common to the lighting fixtures 10 and 10B concerning 1st Embodiment and 2nd Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 3, in the lighting fixture 10 </ b> C according to the third embodiment, the heat radiating plate 29, which is a heat radiating portion, extends through the heat radiating hole 25 to the back surface of the reflecting plate 23, and the top plate 21 a of the fixture main body 21. It extends to. As shown in FIG. 3B, the heat radiating plate 29 is a metal member having good thermal conductivity, and has a contact portion 20b that contacts the coldest portion 24 of the fluorescent lamp 22 from the upper side. A pair of rectifying portions 29a and 29a extend upward from both sides of the portion 20b. And the upper end of the rectification | straightening part 29a is contacting the top plate 21a of the instrument main body 21, and is hold | maintained between the top plate 21a and the fluorescent lamp 22. FIG. Or you may make it attach the heat sink 29 to the top plate 21a of the instrument main body 21. FIG.

  Near the outside of the portion where the rectifying portion 29a of the heat radiating plate 29 is in contact with the top plate 21a, a heat radiating hole 21b is provided in the top plate 21a, and the warm air rising along the outer surface of the rectifying portion 29a is It passes through the heat radiating hole 25 of the reflecting plate 23 and is further emitted from the heat radiating hole 21b of the top plate 21a of the instrument main body 21 to the outside of the instrument main body 21 (see the arrow indicated by a line in FIG. 3A). ).

  By configuring in this way, the action and effect of the first embodiment can be obtained, and the warm air heated by the fluorescent lamp 22 in the heat radiating plate 29 is guided to the outside of the instrument main body 21, so that the coldest part The heat of 24 can be efficiently radiated.

In addition, the lighting fixture of this invention is not limited to each embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.
For example, the shape of the heat sinks 27, 28, and 29 shown in the above-described embodiments is not limited to the above-described one. It is applicable if the same action and effect can be obtained.

(A) is a partially broken perspective view of the lighting fixture according to the first embodiment of the present invention, (B) is a cross-sectional view of the position BB in (A). (A) is sectional drawing of the lighting fixture concerning 2nd Embodiment of this invention, (B) is a perspective view of a heat sink. (A) is sectional drawing of the lighting fixture concerning 3rd Embodiment of this invention, (B) is a perspective view of a heat sink. Sectional drawing showing a conventional lighting fixture

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lighting fixture 11 Ceiling 21 Appliance main body 22 Fluorescent lamp 23 Reflector plate 24 Coldest part 25 Heat radiation hole 27, 28, 29 Heat radiation plate (heat radiation part)
28c Heat radiation fin

Claims (3)

A lighting fixture comprising a fixture main body mounted on a ceiling and having a fluorescent lamp disposed therein, and a reflector disposed in the fixture main body so as to be positioned above the fluorescent lamp,
A heat radiating hole is provided in the reflector near the coldest part of the fluorescent lamp, and a heat radiating part is provided so as to contact the coldest part of the fluorescent lamp and reach the back surface of the reflector through the heat radiating hole. A lighting apparatus characterized by that.   The lighting device according to claim 1, wherein the heat radiating portion has a heat radiating fin on a back surface side of the reflecting plate.   The lighting device according to claim 1, wherein the heat radiating fin is formed so as to rectify air flowing from the heat radiating hole to the back surface of the reflector.

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