JP2005353286A - Illumination device for clean room or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination device for a clean room or the like, of which a harmful effect against air circulation for dust removal is reduced as much as possible so as to reduce installation cost and operation cost. <P>SOLUTION: A framework of the illumination device is constituted by a case main body housing a base plate, on which a plurality of light-emitting diodes are mounted in parallel, and a cover plate transmitting emission light from the light-emitting diodes, fixed to a front face of the case main body. The framework is formed into a shape of a flat box with small protrusion from a mounting face as a whole. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a lighting device such as a clean room that dislikes the presence of protrusions that obstruct the flow of airflow.

The clean room equipment has a different dust removal system depending on the required cleanliness of the room, but basically, it corresponds by changing the direction of the flow of clean air and the amount of circulating air. For example, in a clean room with a relatively low cleanliness of class 100 to 1000 applied to a liquid crystal device, a precision machine factory, and a chemical or food factory, an air conditioner and a dust removing device are installed in the room. The air that has been temperature-controlled and humidity-controlled by this air conditioner is sent to the dust removing device through a duct, and after removing floating fine particles with high efficiency, clean air is blown out into the room.

In general, the regenerated clean air is blown out along the ceiling surface, and the downflow of the clean air is generated by an airflow direction control device installed near the ceiling surface, and concentrated in the work area where cleanliness is required. Air is circulated efficiently (for example, refer to Patent Document 1).
A problem in the circulation process of the clean air is that the airflow of the circulating air is disturbed by the presence of the lighting fixtures provided on the ceiling surface.

For lighting in a clean room, a lighting fixture is attached to a ceiling receiving member at the lower end of a suspension bolt attached to a slab on the upper floor (see, for example, Patent Document 2). Fluorescent lamps are usually used as lighting fixtures, and these fluorescent lamps, including fluorescent lamps, reflective hoods, and controllers, are installed as a whole protruding into the space below the ceiling surface. The distance from the lower surface, that is, the amount of protrusion from the attachment target surface is considerably large.

The luminaire arranged so as to protrude in this way acts as a hindrance to the above-mentioned flow of clean air, changes the direction of the flow of clean air, or blocks the clean air to generate turbulence. Reducing the flow rate of clean air to the originally intended work area, reducing the amount of suspended particulate newly generated in the work area, and reducing the collection efficiency of the fine particles in the entire circulation cycle. become.

In consideration of the above-mentioned adverse effect on the air circulation, it is also proposed to arrange the lighting fixture in the space behind the ceiling (see, for example, Patent Document 3). In this case, the lamp light source is drawn from the ceiling surface, Lighting efficiency decreases. In order to ensure the illuminance in the work area at the expected value, it is necessary to increase the capacity and capacity of the lighting fixtures compared to the case where it is suspended from the ceiling surface, which increases installation costs and operating costs. become.
Moreover, when installing the lighting fixture, an opening for allowing illumination light to pass is provided on the ceiling surface, and installation work is performed in the space behind the ceiling, which increases the installation cost.

JP 2002-162078 A JP 2000-82317 A JP 2002-106196 A

An object of the present invention is to reduce the adverse effect on the flow of circulating air for dust removal as much as possible in lighting equipment such as a clean room, and to reduce installation cost and operation cost.

In a lighting device such as a clean room according to the present invention, a case main body that accommodates a substrate on which a plurality of light emitting diodes are mounted in parallel, and a cover plate that is fixed to the front surface of the case main body and through which radiated light from the light emitting diodes passes. Thus, an outer body of the lighting fixture is formed, and the outer body is formed in a flat box shape that is flat as a whole and has a small amount of protrusion from the mounting target surface.

In the luminaire of the present invention, the outer body of the luminaire is composed of a case main body that accommodates a light emitting diode mounting substrate, and a cover plate that is fixed to the front surface of the case main body. Since the amount of protrusion from the flat lighting box is small, the direction of flow of the circulating air can be greatly changed at the place where the lighting fixture is installed, or the circulating air is excessively blocked to cause turbulent flow. Is greatly suppressed and reduced. Therefore, a required amount of circulating air can be sent to a predetermined work area without increasing the air flow rate of the air conditioner, and a dust removal cycle in a room such as a clean room can be performed efficiently.

In the luminaire of the present invention, a light emitting diode with low power consumption is used as a light source, so that the operating cost is good, and a plurality of light emitting diodes are arranged side by side along the ceiling surface. The lighting efficiency is good.
When installing the luminaire, it is not necessary to form an opening for passing illumination light on the ceiling surface, and only installation work from the space below the ceiling surface is required, so that the installation cost can be reduced.

Since the lighting fixture of the present invention has a small amount of protrusion from the mounting target surface (generally the ceiling surface) as described above, the indoor space such as a clean room is not wasted for the lighting fixture. It can be used effectively to the maximum.

In the embodiment shown in FIGS. 1 to 9, the light emitting diodes 1 are arranged in a plurality of rows in a staggered manner and mounted on the substrate 2, and are connected to an external DC power source by lead wires 12. The kind and performance of the light emitting diode 1 are appropriately selected according to the use of the lighting fixture. For example, (a) a blue light from a ZnSe blue-green LED excites a deep level in a conductive substrate to obtain white light, and (b) a GaN-based blue light emitting diode. GaN-based white light-emitting diodes that excite phosphors using blue light from LEDs to obtain white light, (c) white light-emitting diodes that combine blue, green, and red single-color LEDs is there.

The wiring substrate 2 of the light emitting diode 1 is fitted and fixed to a base boss 3 that is formed to protrude from the four corners of the inner bottom surface of the case body 4. A cover plate 5 made of a transparent or translucent acrylic resin plate or the like is curved in a convex shape toward the outside, and is fastened and fixed to the case body 4 by a waterproof specification by a total of four connecting screws 6. . The cover plate 5 presses the substrate 2 with a projection 14 on the inner surface side.

The outer body 7 composed of the case body 4 and the cover plate 5 is fastened and fixed to the surface 9 to be attached (ceiling surface of the clean room) by two mounting screws 8. The head of the mounting screw 8 is concealed by a decorative cap plate 11 fitted in the front groove 10 of the cover plate 5.
The outer body 7 is configured in a horizontally long flat box shape having a horizontal dimension of 120 mm, a vertical dimension of 55 mm, and a height dimension of 15 mm.

Ventilation grooves 13 are formed on the outer surface of the case body 4 in the vertical and horizontal directions. The heat released from the light emitting diode 1 is removed by the circulating air passing through the ventilation groove 13.

It is a front view of the lighting fixture which concerns on one Example of this invention. It is a left view of the lighting fixture of FIG. It is a bottom view of the lighting fixture of FIG. It is a top view of the lighting fixture of FIG. It is the sectional view on the AA line of FIG. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is a longitudinal cross-sectional view of the use condition of the lighting fixture of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light emitting diode 2 Board | substrate 3 Base boss | hub part 4 Case main body 5 Cover board 6 Connecting screw 7 Outer body 8 Mounting screw 9 Attachment target surface 10 Front groove part 11 Cosmetic cap board 12 Lead wire 13 Ventilation groove 14 Inner surface protrusion part

Claims (1)

An outer body of a lighting fixture is configured by a case main body that accommodates a substrate on which a plurality of light emitting diodes are mounted in parallel, and a cover plate that is fixed to the front surface of the case main body and transmits light emitted from the light emitting diodes. A lighting device such as a clean room in which the outer body is flat as a whole and is formed in a flat box shape with a small amount of protrusion from the mounting target surface.

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