JP2011249132A - Emergency illumination device and emergency luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emergency illumination device and an emergency luminaire that increase visibility even when smoke is generated.SOLUTION: The emergency illumination device includes a lighting portion 2 having a light emitting element group 21 emitting white light and a light emitting element group 22 emitting yellow light, a secondary battery E, a charging circuit portion 6 which charges the secondary battery E through power supply from a commercial power source AC, a power failure detection portion 5 which detects the power supply from the commercial power source AC and its interruption, a lighting circuit portion 3 which uses the secondary battery E as an input power source to supply LED currents I1, I2 to the light emitting element groups 21, 22 of the lighting portion 2, a control portion 4 which drives the lighting circuit portion 3 once the power failure detection portion 5 detects the interruption of the commercial power source AC so as to turn on the lighting portion 2, and a smoke determination portion 7 which determines whether smoke is generated based upon a detection result of a smoke sensor 8 detecting smoke density. The control portion 4 makes the light emitting element groups emit the yellow light when a power failure occurs and smoke is generated or the white light when the power failure occurs and no smoke is generated.

Description

  The present invention relates to an emergency lighting apparatus and an emergency lighting apparatus using a light emitting diode as a light source.

  2. Description of the Related Art Conventionally, there has been provided an emergency lighting device that turns on a light source using power of a secondary battery (battery power supply) that is always provided for the purpose of securing lighting in the event of a power failure due to a fire or the like. In general, the light source is composed of a fluorescent lamp or a halogen bulb. However, in recent years, light-emitting diodes have been increasingly used as light sources for the purpose of energy saving and longer life of general lighting such as base lighting and downlights. Thus, an emergency lighting device using a light emitting diode as a light source has been proposed (see, for example, Patent Document 1).

  Conventional emergency lighting equipment is designed to ensure the safety even if the ambient temperature changes in the event of a fire, etc. The illuminance is set to be 1.5 lx or more.

JP 2007-173061 A

  However, in the event of a fire, the ambient temperature rises, and at the same time, the building becomes hot and smoke is generated, resulting in poor visibility. Furthermore, since the white light emitted from the emergency lighting device is reflected by smoke, it is difficult to reach the floor surface, and there is a problem that visibility of passages and objects is lowered.

  This invention is made | formed in view of the said reason, The objective is to provide the emergency lighting apparatus and emergency lighting fixture which can make visibility high, even when smoke has generate | occur | produced. .

  The emergency lighting device of the present invention includes one or more semiconductor elements that emit light of the same color, a lighting unit having a plurality of light emitting element groups that emit light of different colors, a secondary battery, and a commercial power source. A plurality of light emitting element groups of the lighting unit using the secondary battery as an input power source, a charging circuit unit for charging the secondary battery by power supply of a power source, a power source detection unit for detecting power supply / shutoff from a commercial power source A lighting circuit unit for supplying electric power to each, a control unit for driving the lighting circuit unit to emit light from the light emitting element group when the power source detection unit detects a cut-off of commercial power, and a smoke detection unit for detecting smoke density A smoke determination unit that determines whether or not smoke is generated based on the detection result of the detector, and the control unit detects that the power supply detection unit detects a cut-off of commercial power, and the smoke determination unit generates smoke. If it is determined that the power Part is and detects the interruption of the commercial power supply, the smoke determining unit in the case where it is determined that has not occurred smoke, and switches in different colors the color of light emitted from the lighting unit.

  In this emergency lighting device, the control unit determines the brightness of the lighting unit when the smoke determination unit determines that smoke is generated, and the smoke determination unit determines that smoke is not generated It is preferable to make it larger than the luminance of the lighting part.

  In this emergency lighting device, when the smoke determining unit determines that smoke is generated, the emission wavelength of light emitted from the lighting unit preferably includes at least 589 nm.

  The emergency lighting apparatus of the present invention includes an emergency lighting apparatus and an apparatus main body to which the emergency lighting apparatus is attached. Each of the emergency lighting apparatuses includes one or more semiconductor elements that emit light of the same color. A lighting unit having a plurality of light emitting element groups that emit light of different colors, a secondary battery, a charging circuit unit that charges the secondary battery by supplying power from a commercial power source, A power source detection unit for detecting a cutoff, a lighting circuit unit for supplying power to the plurality of light emitting element groups of the lighting unit using the secondary battery as an input power source, and when the power source detection unit detects a cutoff of a commercial power source A control unit that drives the lighting circuit unit to cause the light emitting element group to emit light, and a smoke determination unit that determines whether smoke is generated based on a detection result of a smoke detector that detects smoke concentration, The control unit When the output section detects the interruption of commercial power and the smoke judgment section judges that smoke is generated, the power detection section detects the interruption of commercial power and the smoke judgment section generates smoke The color of the light emitted from the lighting unit is switched to a different color when it is determined that it is not.

  As described above, the present invention has an effect of improving visibility even when smoke is generated.

It is a figure which shows the block configuration of the emergency illuminating device of this invention. It is a figure which shows the block configuration of the emergency illuminating device provided with the red, green, and blue light emitting diode same as the above. It is a figure which shows the external appearance of the emergency lighting fixture of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a block diagram of an emergency lighting device 1 according to an embodiment of the present invention. The emergency lighting device 1 according to this embodiment includes a lighting unit 2, a lighting circuit unit 3, a control unit 4, a power failure detection unit 5, a charging circuit unit 6, and a secondary battery E.

  The charging circuit unit 6 charges the secondary battery E by supplying power from the commercial power source AC.

  The lighting unit 2 includes two light emitting element groups 21 and 22 that emit light in different colors. The light emitting element group 21 is configured by connecting light emitting diodes (semiconductor light emitting elements) 21a and 21b that emit white light in series. The light emitting element group 22 is configured by connecting in series light emitting diodes 22a and 22b that emit yellow light having an emission wavelength of 589 nm. Each light emitting element group 21, 22 is connected to the lighting circuit unit 3.

  The lighting circuit unit 3 supplies the LED current I1 to the light emitting element group 21 and the LED current I2 to the light emitting element group 22 by using the secondary battery E as an input power source. The lighting circuit unit 3 includes switching elements Q1 and Q2 made of npn transistors and resistors (current limiting elements) R1 and R2. The switching element Q1 has a collector connected to the positive electrode of the secondary battery E, a base connected to the control unit 4, and an emitter connected to the anode of the light emitting diode 21a of the light emitting element group 21 via the resistor R1. The switching element Q2 has a collector connected to the positive electrode of the secondary battery E, a base connected to the control unit 4, and an emitter connected to the anode of the light emitting diode 22a of the light emitting element group 22 via the resistor R2. Then, the switching elements Q1, Q2 are turned on / off according to the control signals S2a, S2b output from the control unit 4 to the bases of the switching elements Q1, Q2, and the LED currents I1, I2 are supplied to the light emitting element groups 21, 22. Is supplied.

  The power failure detection unit 5 (power supply detection unit) monitors the power supply state from the commercial power supply AC, and outputs a detection signal S1 indicating power supply / cutoff to the control unit 4.

  The control unit 4 includes a smoke determination unit 7 connected to a smoke detector 8 provided outside. The smoke detector 8 detects the smoke density and outputs a smoke detection signal S3 indicating the smoke density to the smoke judgment unit 7. The smoke determination unit 7 determines whether or not smoke is generated based on the smoke detection signal S3. And the control part 4 outputs control signal S2a, S2b based on the detection result of the power failure detection part 5, and the judgment result of the smoke judgment part 7, and controls the operation | movement of the lighting circuit part 3, The lighting part 2 is made. The lighting is controlled.

  First, a case where power is supplied from the commercial power supply AC and smoke is not generated will be described. When the power failure detection unit 5 detects power supply from the commercial power supply AC and outputs a detection signal S1 indicating power supply to the control unit 4, the control unit 4 determines that it is in a power supply state. Further, when the smoke density indicated by the smoke detection signal S3 output from the smoke detector 8 to the smoke determination unit 7 is less than a predetermined value, the smoke determination unit 7 determines that no smoke is generated. Then, the control unit 4 outputs control signals S2a and S2b that turn off the switching elements Q1 and Q2. Since the switching elements Q1 and Q2 are off, the light emitting element groups 21 and 22 are turned off without being supplied with power. Therefore, when power is supplied from the commercial power supply AC and no smoke is generated, the lighting unit 2 is turned off.

  Next, a case where a power failure occurs due to the interruption of the commercial power supply AC and no smoke is generated will be described. When the power failure detection unit 5 detects a power failure, and the detection signal S1 indicating the power failure is output to the control unit 4, the control unit 4 determines that it is in a power failure state. Further, when the smoke density indicated by the smoke detection signal S3 output from the smoke detector 8 to the smoke determination unit 7 is less than a predetermined value, the smoke determination unit 7 determines that no smoke is generated. Then, the control unit 4 outputs a control signal S2a for turning on the switching element Q1 and a control signal S2b for turning off the switching element Q2. Therefore, the LED current I1 is supplied to the light emitting element group 21, and white light is emitted from the light emitting diodes 21a and 21b. Since the switching element Q2 is off, the light emitting element group 22 is turned off without being supplied with power. Therefore, when a power failure occurs and no smoke is generated, white light is emitted from the lighting unit 2.

  Next, a case where a power failure occurs due to a fire or the like and smoke is generated will be described. When the power failure detection unit 5 detects a power failure, and the detection signal S1 indicating the power failure is output to the control unit 4, the control unit 4 determines that it is in a power failure state. Further, when the smoke density indicated by the smoke detection signal S3 output from the smoke detector 8 to the smoke determination unit 7 is equal to or higher than a predetermined value, the smoke determination unit 7 determines that smoke is generated. Then, the control unit 4 outputs a control signal S2a for turning off the switching element Q1 and a control signal S2b for turning on the switching element Q2. Therefore, the LED current I2 is supplied to the light emitting element group 22, and yellow light is emitted from the light emitting diodes 22a and 22b. Since the switching element Q1 is off, the light emitting element group 21 is turned off without being supplied with power. Therefore, when a power failure occurs and smoke is generated, yellow light is emitted from the lighting unit 2.

  Thus, the emergency lighting device 1 of this embodiment switches the color of the light radiated | emitted from the lighting part 2 at the time of a power failure by the presence or absence of generation | occurrence | production of smoke. When the smoke determination unit 7 determines that no smoke is generated, white light is emitted from the lighting unit 2. Since white light has high recognition of the color of an object, it is easy to check the surrounding situation in an emergency, and safety is improved.

  Further, when the smoke determining unit 7 determines that smoke is generated, yellow light is emitted from the lighting unit 2. In a situation where smoke is generated, white light is reflected by the smoke and the visibility of the passage and the object is lowered, while yellow light is highly permeable to smoke and easily recognizes the passage and the object. Therefore, it is possible to evacuate more safely in the event of an emergency when smoke is generated by a fire or the like.

  In the present embodiment, the yellow light is emitted by causing the light emitting diodes 21a and 21b to emit light. However, the light may be light with a light emission wavelength in the vicinity of 589 nm, for example, which is a color with high permeability to smoke.

  In addition, in order to use as an emergency lighting device in Japan, it is necessary to conform to the Japanese Lighting Equipment Manufacturers Association's emergency lighting equipment technical standards (JIL5501), guide lighting equipment and evacuation guidance system equipment technical standards (JIL5502), It must be ensured that the ambient temperature is 140 ° C or higher and the floor illumination is 1 lx or higher. However, the illuminance may decrease by switching the color of light emitted from the lighting unit 2 from white to yellow. Also, the white light emitting diodes 21a and 21b of the light emitting element group 21 and the yellow light emitting diodes 22a and 22b of the light emitting element group 22 may have different light emission efficiency with respect to current. Therefore, even when yellow light is radiated, the present embodiment is adapted so that it conforms to the emergency lighting fixture technical standard (JIL5501), guide lamp fixture and evacuation guidance system device technical standard (JIL5502) of the Japan Lighting Fixtures Manufacturers Association. The emergency lighting device 1 performs the following current control.

  In the emergency lighting device 1 of the present embodiment, the LED current I2 supplied to the light emitting element group 22 that emits yellow light is made larger than the LED current I1 supplied to the light emitting element group 21 that emits white light. As a method of making the LED current I2 larger than the LED current I1, there are the following method examples.

  The control signals S2a and S2b output from the control unit 4 to the switching elements Q1 and Q2 are composed of PWM signals. Then, the duty of the control signals S2a and S2b is varied to make the on-duty of the switching element Q2 larger than the on-duty of the switching element Q1.

  Further, the resistance R2 connected in series to the light emitting element group 22 may be configured to be smaller than the resistance R21 connected in series to the light emitting element group 21.

  With the above method, the LED current I2 can be made larger than the LED current I1. As a result, the brightness of the light emitting diodes 22a and 22b of the light emitting element group 22 that emits yellow light is increased, and the Japan Lighting Equipment Manufacturers Association's emergency lighting equipment technical standards (JIL5501), guide lamp equipment, and evacuation guidance system equipment Technical standards (JIL5502) can be met. Further, by increasing the brightness of the light emitting diodes 22a and 22b of the light emitting element group 22, even when the visibility is poor due to the generation of smoke, light with high permeability to smoke is strongly emitted, so that the visibility of passages and objects is high. Can be improved.

  Moreover, the emergency lighting device 1 of the present embodiment sets an upper limit value of the LED current I2. Therefore, when the LED current I2 is supplied to emit yellow light, the lighting time by the secondary battery E can be prevented from being shorter than the predetermined time, and the predetermined illuminance can be ensured.

  In addition, as shown in FIG. 2, a plurality of light emitting element groups 23 to 25 are provided, and the color of light emitted from the lighting unit 2 is changed by changing a composite ratio of light emitted by the light emitting element groups 23 to 25. A configuration may be adopted. The lighting unit 2 of the emergency lighting device 1 illustrated in FIG. 2 includes light emitting element groups 23 to 25. The light emitting element group 23 includes red light emitting diodes 23a and 23b, the light emitting element group 24 includes green light emitting diodes 24a and 24b, and the light emitting element group 25 includes blue light emitting diodes 25a and 25b. Each of the light emitting element groups 23 to 25 is connected to the lighting circuit unit 3.

  The lighting circuit section 3 supplies the LED current I3 to the light emitting element group 23, the LED current I4 to the light emitting element group 24, and the LED current I5 to the light emitting element group 25, thereby causing each of the light emitting element groups 23 to 25 to emit light. Yes. In addition, the lighting circuit unit 3 includes a driver that controls the values of the LED currents I3 to I5 based on the control signal S2 output from the control unit 4. Then, by controlling the values of the LED currents I3 to I5 and changing the mixing ratio of red, green and blue light emitted from the light emitting element groups 23 to 25, the color of the light can be changed. it can. Therefore, white light or yellow light can be emitted, and the color of the light emitted from the lighting unit 2 can be set finely. Note that a technique for changing the color of light by combining red, green, and blue light emitted from the light emitting element groups 23 to 25 is a well-known technique, and a detailed description thereof will be omitted.

  Next, the external view of the emergency lighting fixture 9 provided with the above-mentioned emergency lighting apparatus 1 is shown in FIG. The emergency lighting fixture 9 includes the above-described emergency lighting device 1 and a fixture main body 10 to which the emergency lighting device 1 is attached. The emergency lighting fixture 9 is a downlight, and the fixture main body 9 storing the emergency lighting device 1 is embedded in the ceiling. And the lighting part 2 with which the emergency illuminating device 1 was equipped irradiates a floor surface.

DESCRIPTION OF SYMBOLS 1 Emergency lighting device 2 Lighting part 3 Lighting circuit part 4 Control part 5 Power failure detection part 6 Charging circuit part 7 Smoke judgment part 8 Smoke detectors 21 and 22 Light emitting element group 21a, 21b Light emitting diode 22a, 22b Light emitting diode E Secondary Battery R1, R2 Resistance Q1, Q2 Switching element

Claims (4)

A lighting unit including a plurality of light emitting element groups each composed of one to a plurality of semiconductor elements that emit light of the same color and that emit light of different colors;
A secondary battery;
A charging circuit unit for charging the secondary battery by supplying power from a commercial power source;
A power detection unit for detecting power supply / shutoff from a commercial power supply;
A lighting circuit unit that supplies power to each of the plurality of light emitting element groups of the lighting unit using the secondary battery as an input power source;
When the power supply detection unit detects the interruption of the commercial power supply, the control unit that drives the lighting circuit unit to emit light from the light emitting element group;
A smoke judgment unit for judging the presence or absence of smoke based on the detection result of the smoke detector for detecting the smoke density;
The control unit detects that the power supply detection unit detects a commercial power supply interruption, and the smoke determination unit determines that smoke is generated; and the power supply detection unit detects a commercial power supply interruption; and An emergency lighting device, wherein the smoke determining unit switches the color of light emitted from the lighting unit to a different color when it is determined that no smoke is generated.   The control unit determines the luminance of the lighting unit when the smoke determination unit determines that smoke is generated, from the luminance of the lighting unit when the smoke determination unit determines that no smoke is generated. The emergency lighting device according to claim 1, wherein the emergency lighting device is also made larger.   3. The emergency lighting device according to claim 1, wherein when the smoke determination unit determines that smoke is generated, an emission wavelength of light emitted from the lighting unit includes at least 589 nm.   An emergency lighting apparatus comprising: the emergency lighting apparatus according to any one of claims 1 to 3; and an instrument main body to which the emergency lighting apparatus is attached.

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