JP2006278656A - Emergency lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emergency lighting device which suppresses an increase in the temperature of a light-emitting diode, and improves light-emitting efficiency even if an ambient temperature goes up on the occurrence of a fire, thus capable of lighting at a given level in an emergency. <P>SOLUTION: The emergency lighting device comprises a light-emitting element 18 which has a package formed of an incombustible material, a lead derived from the package, the light-emitting diode connected electrically to the lead, a resin member covering the light-emitting diode, and a glass covering the resin member. The lighting device further includes an implement body 13 on which the light-emitting element 18 is disposed, an emergency battery 21 arranged on the implement body 13, and a lighting unit 31 which causes the light-emitting element 18 to emit light using the battery 21 as a power supply. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an emergency lighting device having a light emitting diode.

  In recent years, a light-emitting diode, which is a semiconductor light-emitting element with a long life and low power consumption, has been studied as a light source for an emergency lighting device in place of a light bulb having a filament (Patent Document 1).

  However, the light emitting diode generates a relatively large amount of heat when it is turned on, and there is a problem that the luminous efficiency is lowered due to this temperature rise and a predetermined illuminance cannot be obtained.

  In order to solve this problem, in a lighting device using this type of light emitting diode as a light source, the heat dissipation characteristics of the light emitting diode are improved to prevent a decrease in light emission efficiency (Patent Documents 2 and 3).

  Patent Document 2 includes a thermally conductive graphite provided so as to be in contact with an end portion of a lead wire of a light emitting diode, and a heat radiator provided directly or indirectly on the thermally conductive graphite. The heat is radiated to the outside to prevent the temperature from rising.

In Patent Document 3, an LED chip is sealed in a container, and a liquid is filled in the container, and heat from the LED chip is radiated by the liquid to suppress an increase in temperature.
JP 2004-103256 A JP 2003-100110 A Japanese Patent Laid-Open No. 11-163410

  In order to satisfy this condition, an emergency lighting device that is turned on in the event of a power outage in the event of a fire, etc., must exhibit the specified emergency lighting function even in situations where the ambient temperature has become considerably high due to a fire. In addition, the emergency lighting equipment technical standard JIL5501 (Japan Lighting Appliances Industry Standard) or the guidelines for emergency lighting equipment stipulates that one-lux lighting can be performed for 30 minutes at an ambient temperature of 140 ° C. .

  In the light emitting diode, the junction part of the PN junction is generally allowed up to a rated temperature of about 120 ° C. However, when the ambient temperature of the device becomes a high temperature of 140 ° C., the light emitting diode raised to 120 ° C. It is difficult to cool the heat by radiating the temperature to the outside air, and the usual heat radiating means disclosed in Patent Documents 2, 3 and the like cannot take countermeasures.

  As a result, the light emitting diode cannot be cooled, the temperature rises, the light emission efficiency is lowered, and there is a problem that it is difficult to continue illumination that satisfies the above-described criteria in an emergency.

  The present invention relates to an emergency lighting device that is turned on in the event of a power outage in the event of a fire, etc., even if the ambient temperature rises, the temperature rise of the light emitting diode is suppressed, the luminous efficiency is improved, and predetermined lighting is provided in an emergency. An object of the present invention is to provide an emergency lighting device that can be performed.

  The invention described in claim 1 includes a package formed of a non-combustible material, a lead derived from the package, a light emitting diode electrically connected to the lead, a resin member covering the light emitting diode, and a glass covering the resin member. A light emitting element; an instrument body in which the light emitting element is disposed; an emergency battery disposed in the instrument body; and a lighting device that lights the light emitting element by using the battery as a power source. And

  The package is made of a non-combustible material such as ceramic, and can take a structure in which the entire package is covered with the non-combustible material. The package may have a highly reflective characteristic so as to reflect light from the light emitting diodes disposed inside the package. In this case, there is an effect that it is not necessary to use a reflective material as a separate member.

  For example, silicone having a normal viscosity is used as the resin member covering the light emitting diode, but liquid silicone or the like may be used. The resin member may contain a phosphor for conversion to white light.

  Further, a resin film having good adhesion to silicone may be provided on the back side (resin member side) of the glass covering the resin member. Thereby, since the glass and the silicone are in close contact with each other through the resin film, the silicone does not peel from the glass even when the ambient temperature rises during a fire or the like, and the optical characteristics are not deteriorated. That is, it is possible to prevent a decrease in light transmittance and color unevenness.

  Moreover, you may apply | coat a fluorescent substance film on the surface side (outer surface side) of glass instead of a resin member. Since the glass surface has good smoothness and can be applied uniformly, color unevenness can be reduced.

  With the above configuration, the resin member inside the package is protected by the package and glass even if the ambient temperature rises in the event of a fire, etc., so it is possible to suppress a decrease in luminous efficiency and color unevenness, and to provide predetermined lighting in an emergency. It can be carried out.

  According to a second aspect of the present invention, in the emergency lighting device according to the first aspect, the lighting device uses a battery as a power source so that the light output of the light-emitting element becomes a predetermined light output during emergency lighting. The lighting current is controlled to 1 lux, and 1-lux emergency lighting is secured for 30 minutes with the ambient temperature at 140 ° C.

  According to the invention of claim 1, even if the ambient temperature rises in the event of a fire or the like, the non-combustible material package and the glass protect the internal resin member and suppress the temperature rise of the light emitting diode, so that the luminous efficiency is reduced. Further, color unevenness can be suppressed, and predetermined illumination can be performed in an emergency.

  Moreover, exposure of the light emitting diode to external heat is suppressed, and deterioration of the light emitting diode and peripheral members can be suppressed.

  According to the invention of claim 2, the lighting device controls the lighting current to the light emitting element that uses the battery as a power source so that the light output of the light emitting element becomes a predetermined light output at the time of emergency lighting. Since it is turned on, 1-lux emergency lighting can be secured for 30 minutes in an ambient temperature of 140 ° C.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a side view of an emergency lighting device, FIG. 2 is a bottom view of the emergency lighting device, and FIG. 3 is an enlarged cross-sectional view of a light emitting element.

  1 to 3, the emergency lighting device 11 has an appliance body 13 embedded and installed in a ceiling plate 12, and a flange portion 14 joined to the ceiling plate 12 is provided around the lower portion of the appliance body 13. A pair of locking springs 15 for locking on the ceiling plate 12 are attached to the side surfaces.

  The lower surface 16 of the instrument body 13 is formed with a recess 17 that opens downward and has a light emitting element 18 used as an emergency light source disposed in the recess 17. A lens 19 for controlling 18 lights is arranged.

  The light emitting element 18 includes a package 18a formed of a non-combustible material, a lead 18b derived from the package, a light emitting diode 18c electrically connected to the lead, a resin member 18d covering the light emitting diode, and a glass 18e covering the resin member. Configured.

  The package 18a is made of a ceramic incombustible material, and the package has a high reflectance characteristic so as to reflect light from a light emitting diode disposed in the package. The resin member 18e covering the light emitting diode uses silicone, and the silicone contains a phosphor for converting light from the light emitting diode 18c into white light. Moreover, you may apply | coat a fluorescent substance as a fluorescent substance film on the surface side (outer surface side) of glass. Since the glass surface has good smoothness and can be applied uniformly, color unevenness can be reduced.

  Further, a resin film 18f having good adhesiveness with silicone is provided on the back side (silicone side) of the glass covering the silicone. Thereby, since the glass and the silicone are in close contact with each other through the resin film, the silicone does not peel from the glass even when the ambient temperature rises during a fire or the like, and the optical characteristics are not deteriorated. That is, it is possible to prevent a decrease in light transmittance and color unevenness.

  With the above configuration, the resin member inside the package is protected by the package and glass even if the ambient temperature rises in the event of a fire, etc., so it is possible to suppress a decrease in luminous efficiency and color unevenness, and to provide predetermined lighting in an emergency. It can be carried out.

  An opening / closing lid 20 is provided on the lower surface 16 of the instrument main body 13 so as to be openable and closable, and a battery 21 is built in the opening / closing lid 20.

  An inspection button 22 for inspecting the battery 21 is provided on the lower surface 16 of the instrument body 13 by supplying the power of the battery 21 to the light emitting element 18 and confirming that it is lit, and commercial power is supplied to the upper side of the instrument body 13 A terminal block 23 for connecting a power supply line is provided.

  The emergency lighting device 11 has a lighting device 31 that controls the lighting of the light emitting element 18. The lighting device 31 charges the battery 21 when the commercial power is supplied and uses the battery 21 as a power source when the commercial power is cut off. A charge / discharge circuit for lighting 18 is provided.

  The lighting device 31 is connected to ambient temperature detecting means for detecting the ambient temperature of the appliance. Further, when a plurality of light emitting elements 18 are connected, they are connected in series, and if even one of them is not lit, all are lit off, and an abnormality can be confirmed at the time of inspection by the inspection button 22.

  The lighting device 31 has a function of controlling the lighting current to the light emitting element 18 that uses the battery 21 as a power source and turning on the light emitting element 18 at the time of emergency lighting, and based on the detection of the ambient temperature detection means It has a function of controlling the lighting current to the light emitting element 18 using the battery 21 as a power source so that the 18 light outputs become a predetermined light output.

  In this function, it is possible to control more finely by providing correlation data between the ambient temperature of the appliance detected by the ambient temperature detection means and the ambient temperature of the light emitting element 18. Further, the lighting device 31 has a function of a lighting current value detecting means for detecting a lighting current value passed through the light emitting element 18, and a function of varying a lighting current passed through the light emitting element 18 by a charge / discharge circuit.

  The ambient temperature detection means functions as a light output detection means that indirectly determines and detects the light output of the light emitting element 18 based on the ambient temperature of the appliance.

  Next, the control operation of the lighting device 31 will be described. When commercial power is supplied to the emergency lighting device 11, the lighting device 31 charges the battery 21 with the commercial power. The lighting device 31 is supplied with the ambient temperature of the place where the emergency lighting device 11 is detected, which is detected by the ambient temperature detection means 32. As a result, the lighting device 31 obtains and sets a target value of the lighting current at which the light output of the light emitting element 18 becomes a predetermined light output from the input ambient temperature.

  When the commercial power supply is cut off, the lighting device 31 stops charging the battery 21, detects the lighting current value flowing from the battery 21 to the light emitting element 18, and detects the lighting current value detected in advance and the preset lighting. Compare with current target value.

  If they match, the lighting current is made to flow through the light emitting element 18 to light the light emitting element 18, and if they do not match, the lighting current is varied and corrected to match, and the corrected lighting current is corrected to the light emitting element. The light emitting element 18 is turned on.

  By repeating such control operation of the lighting device 31, even when the ambient temperature rises, the lighting current passed through the light emitting element 18 can be corrected to be high, and the light output of the light emitting element 18 can be prevented from being reduced. The light output of the element 18 can be made constant and maintained for a predetermined time.

  Thus, during emergency lighting, the lighting current to the light emitting element 18 that uses the battery 21 as a power source is controlled based on the target value of the lighting current set in relation to the ambient temperature. Power consumption can be reduced while obtaining a predetermined light output as compared with the case of continuously lighting with the output. Therefore, the capacity of the battery 21 can be reduced and reduced in weight, and the battery 21 and the emergency lighting device 11 incorporating the battery 21 can be reduced in size and weight.

  Further, since the ambient temperature is detected and the lighting current to the light emitting element 18 using the battery 21 as a power source is controlled so that the light output of the light emitting element 18 becomes a predetermined light output, the light emitting element 18 and the battery Even if the ambient temperature of 21 fluctuates, the light output of the light emitting element 18 can be kept constant.

  The light output detection means is indirectly determined based on the ambient temperature and detected, but may be detected indirectly based on the elapsed lighting time of the light emitting element 18 and the capacity of the battery 21. Alternatively, the light output of the light emitting element 18 may be directly detected by a sensor or the like.

The side view of the emergency illuminating device which shows one embodiment of this invention. Similarly, the bottom view of an emergency lighting device. Similarly, the expanded sectional view of a light emitting element.

Explanation of symbols

11 Emergency lighting system
18 Light emitting element
21 battery
31 Lighting device

Claims (2)

A package formed of a non-combustible material, a lead derived from the package, a light emitting diode electrically connected to the lead, a resin member covering the light emitting diode, and a light emitting element having glass covering the resin member;
An instrument body on which a light emitting element is disposed;
An emergency battery disposed in the instrument body;
A lighting device for lighting a light emitting element using a battery as a power source;
An emergency lighting device comprising:   The lighting device controls a lighting current to a light emitting element that uses a battery as a power source so that the light output of the light emitting element becomes a predetermined light output at the time of emergency lighting, and turns on the light emitting element. The emergency lighting device according to 1.

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