JP5877367B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture.

  2. Description of the Related Art Conventionally, there has been provided a lighting fixture that is embedded in a ceiling surface and emits light downward, and includes a fan for air cooling (see, for example, Patent Document 1). In particular, when a light-emitting diode is used as a light source, the light-emitting diode is more likely to cause a decrease in light flux or a deterioration due to heat as compared with other electrical light sources, and thus the above-described fan is often provided. .

  Conventionally, the fan has been arranged on the upper side of the lamp holding the light source.

JP 2010-97915 A

  However, when the fan is arranged on the upper side of the lamp body, the size in the vertical direction becomes large, and the condition of the installation place where the lighting fixture can be arranged becomes severe.

  This invention is made | formed in view of the said reason, The objective is to provide the lighting fixture which can make the dimension in an up-down direction small.

The luminaire of the present invention includes a main body part that is embedded in a ceiling material while holding an electrical light source in a direction in which light is emitted downward, and a plurality of heat radiation fins that protrude from the upper surface of the main body part A lamp body, a cover that covers the plurality of heat radiation fins as viewed from above, a duct that is tubular and has one end connected to an air cooling channel formed between the heat radiation fins, A fan that generates an airflow flowing in from the one end side, and a power supply block that generates electric power for turning on the light source and electric power that drives the fan, respectively, and the fan and the power supply block are each of the lamp body The cover has a fixing part that protrudes to the side of the heat radiating fin and to which the fan and the power supply block are fixed .

  Moreover, in the above-described lighting fixture, the cover and the duct may be configured by one component.

  Further, in the above luminaire, the duct may be provided with a trap portion in which a cross-sectional shape of the air cooling channel in a cross section perpendicular to the direction of the airflow is made larger than a portion on the upstream side. desirable.

  Moreover, in the above-described lighting fixture, it is preferable that the power supply block is provided with a flow path through which the airflow passes.

  Furthermore, in the above-described lighting device, the fan and the power supply block may be housed in the duct, respectively.

Another type of lighting fixture includes a main body portion that is embedded in a ceiling material while holding an electric light source in a direction in which light is emitted downward, and a plurality of heat dissipations that protrude from the upper surface of the main body portion. A lamp body having fins, a cover that covers the plurality of heat dissipating fins when viewed from above, a duct having a cylindrical shape and one end connected to an air cooling channel formed between the heat dissipating fins, and the duct A fan that generates an airflow that flows in from the one end side, and a power supply block that generates electric power for turning on the light source and electric power that drives the fan, respectively, and the fan and the power supply block respectively It is arranged on the side of the body. In the above-described lighting device, it is desirable that the duct is made of a flexible material.

  According to the present invention, since the fan and the power supply block are arranged on the side of the lamp body, the vertical dimension can be reduced as compared with the case where the fan and the power supply block are arranged on the upper side of the lamp body. it can.

(A) (b) shows embodiment of this invention, respectively, (a) is a front view, (b) is a top view. It is a front view which shows the example of a change same as the above. It is a front view which shows another example of a change same as the above. It is a front view which shows another example of a change same as the above. It is a front view which shows another example of a change same as the above.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the present embodiment includes a lamp body 1 that holds a plurality of light emitting diodes 11 as a light source, and is embedded in an embedded hole 20 provided in a ceiling material 2 that constitutes a ceiling surface. Established. Hereinafter, the vertical and horizontal directions are based on FIG. 1A, and the direction perpendicular to the paper surface of FIG. 1A (the vertical direction in FIG. 1B) is referred to as the front-back direction.

  The lamp body 1 includes a main body 12 that houses the light emitting diode 11 and a flange 13 that protrudes outward in the horizontal direction from the lower end of the main body 12. The lamp body 1 is fixed in such a manner that the main body portion 12 is inserted into the embedding hole 20 and the flange portion 13 is brought into contact with the ceiling surface (the lower surface of the ceiling material 2). The main body 12 as a whole has a truncated cone shape whose outer diameter is increased downward in the axial direction, and for example, by holding the light emitting diode 11 on the bottom surface of a recess opened downward, the light emission is achieved. The light from the diode 11 is emitted downward. The flange 13 has an annular shape surrounding the main body 12, and the gap between the outer peripheral surface of the main body 12 and the inner peripheral surface of the embedding hole 20 is covered by the flange 13 when viewed from below. Is called. As a means for fixing the lamp body 1 to the ceiling material 2, for example, a leaf spring (not shown) that sandwiches the ceiling material 2 with the flange portion 13 is attached to the main body portion 12.

  A plurality of (six in the figure) radiating fins 14 each projecting upward are provided on the upper surface of the main body 12 with the thickness direction directed in the front-rear direction. An air cooling channel is formed between the radiating fins 14. In the lamp body 1, the members interposed between the light emitting diodes 11 and the radiation fins 14 and the radiation fins 14 themselves are preferably made of a material having as high a thermal conductivity as possible.

  Furthermore, this embodiment is provided with the cover 3 which covers each radiation fin 14 seeing from upper direction. The cover 3 is made of, for example, metal, and known means such as screwing or uneven engagement can be used as a means for fixing the cover 3 to each radiation fin 14.

  Further, the cover 3 extends rightward from the heat radiating fins 14, and a duct 4 having an opening directed in the left-right direction is fixed below the portion of the cover 3 protruding rightward from the heat radiating fins 14. ing. The left end of the duct 4 is connected to an air cooling channel formed between the radiating fins 14. The duct 4 may be configured as a separate part from the cover 3 or may be formed as a single part together with the cover 3. As a method of manufacturing a part in which the duct 4 and the cover 3 are integrated, bending of a metal plate or molding with a synthetic resin can be used.

  A power source block 5 that outputs DC power that is electrically connected to the light emitting diode 11 and lights the light emitting diode 11 is housed and fixed at the right end of the duct 4. The power supply block 5 can be realized using a known DC power supply circuit. As a power source of the power supply block 5 itself, a battery may be used, or power input from the outside may be used. When electric power input from the outside through the power supply line is used, the power supply block 5 is provided with a terminal block or a connector to which the power supply line is connected.

  Further, in the duct 4, a fan 6 that generates a rightward airflow as indicated by a broken-line arrow is housed and held on the left side of the power supply block 5. Power for operating the fan 6 is supplied from the power supply block 5. In order to shorten the power supply path from the power supply block 5 to the fan 6, it is desirable that the fan 6 be arranged as close to the power supply block 5 as possible.

  According to the above configuration, since the fan 6 is disposed on the side of the lamp body 1, the vertical dimension can be reduced as compared with the case where the fan 6 is disposed on the upper side of the lamp body 1.

  Further, since the power supply block 5 is arranged in the duct 4 together with the fan 6, the power supply block 5 can be cooled by the airflow of the fan 6. As shown in FIG. 2, it is possible to provide a case 51 for storing circuit components in the power supply block 5 separately from the duct 4 and fix it to the cover 3 on the right side of the right opening of the duct 4. This embodiment has the advantage that the number of parts can be reduced. In the example of FIG. 2, the portion of the cover 3 that protrudes to the right of the radiating fins 14 is the fixed portion. Even in the case of FIG. 2, for cooling the power supply block 5, the case 51 preferably has, for example, a cylindrical structure having a flow path through which the airflow of the fan 6 passes. If air cooling of the power supply block 5 is achieved by the airflow of the fan 6 as described above, in the power supply block 5, while maintaining a necessary heat radiation amount, the interval between parts can be shortened and the radiation fins can be omitted. It becomes possible to reduce the size.

  Further, since the heat dissipating fins 14, the fan 6 and the power supply block 5 are arranged in a straight line, and the fan 6 is directed in the horizontal direction which is the arrangement direction thereof, the fan 6 is moved in the vertical direction as shown in FIG. Compared to the case where the airflow is directed (that is, the case where the airflow is bent at a substantially right angle at the position of the fan 6), the airflow resistance is lowered and the efficiency of air cooling is improved.

  Here, when dust reaches the fan 6, the dust is collected on the rotation shaft of the fan 6, so that the noise generated by the fan 6 may increase or the operation of the fan 6 may be hindered. . In the present embodiment, the fan 6 is disposed on the right side, which is downstream of the radiating fins 14, and the upper side of the fan 6 is covered with the duct 4 and the cover 3, so the fan 6 is disposed at the end on the intake side. As compared with the case where the fan 6 is exposed when viewed from above, the dust hardly reaches the fan 6.

  Further, at the left end portion of the duct 4, the cross-sectional area of the flow path of the airflow is smaller than the space between the radiating fins 14 by the cross-sectional area of each radiating fin 14. Thereby, the left end portion of the duct 4 is a trap portion where the flow velocity of the airflow is reduced, and dust easily falls at the trap portion. Therefore, the fan 6 is compared with the case where there is no trap portion as described above. Dust is difficult to reach. Furthermore, in the duct 4, you may provide the trap part 41 which expands the flow path of airflow, as shown in FIG.

  If the duct 4 is made of a material such as a flexible synthetic resin or metal, the power block 5 and the fan 6 can be placed on the ceiling member 2 as shown in FIG. . Furthermore, if a duct 4 having a pleated structure (so-called bellows) is used, the duct 4 is further easily deformed.

  Note that the plurality of radiating fins 14 are not limited to the plate shapes facing each other as described above, and may be, for example, pin-like ridges.

DESCRIPTION OF SYMBOLS 1 Light body 2 Ceiling material 3 Cover 4 Duct 5 Power supply block 6 Fan 11 Light emitting diode (light source)
12 body part 14 heat radiation fin 41 trap part

Claims (5)

A lamp body having a plurality of heat dissipating fins projecting on a main body portion that is embedded in a ceiling material while holding an electric light source in a direction in which light is emitted downward, and the upper surface of the main body portion;
A cover that covers the plurality of heat radiation fins when viewed from above;
A duct having a cylindrical shape and one end connected to an air cooling channel formed between the radiating fins;
A fan for generating an airflow flowing into the duct from the one end side;
A power supply block for generating power for turning on the light source and power for driving the fan, respectively.
The fan and the power supply block are respectively disposed on the sides of the lamp body ,
The cover has a fixing portion that protrudes to the side of the heat radiating fin and to which the fan and the power supply block are respectively fixed . The cover and the duct are composed of one part.
The lighting fixture according to claim 1. The duct is provided with a trap portion in which the cross-sectional shape of the air cooling channel in a cross section perpendicular to the direction of the airflow is made larger than the upstream portion.
The lighting fixture according to claim 1 or 2, characterized by the above-mentioned. The power supply block is provided with a flow path through which the airflow passes.
The lighting fixture of any one of Claims 1-3 characterized by the above-mentioned. The fan and the power supply block are housed in the duct, respectively.
The lighting fixture according to claim 1.

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