JP4683286B2 - Emergency lighting system - Google Patents

Description

  The present invention relates to an emergency lighting device using an LED as a light source.

  Currently, as an emergency lighting device, there is known a dedicated type (for example, see Patent Document 1) in which a halogen light bulb is turned on at the time of an emergency such as a power failure of an external power supply or at the time of checking an internal emergency power supply.

In recent years, an emergency lighting device using an LED as a light source has been developed (for example, see Patent Document 2). That is, since the LED is power-saving, for example, it is expected that a battery as an emergency power source is reduced in size, and the LED itself is also small and relatively easy to perform optical control. There are those more and child downsizing can be expected that the entire instrument is compact. Therefore, it is expected to be put to practical use as a replacement for an emergency lighting device using a conventional halogen bulb.

  On the other hand, for emergency light lighting devices using light bulbs, it is stipulated that the light bulbs will continue to be lit for 30 minutes when the emergency power supply is supplied, and that the floor surface illuminance of 1 lx (lux) or higher will be maintained at ambient temperatures Has been. Further, it is specified that lighting can be continued for 30 minutes in an atmosphere having an ambient temperature of 140 ° C.

In addition, it is known that the light output of the LED changes as the ambient temperature changes. For this measure, the LED detects the ambient temperature and changes the current flowing through the LED (for example, And Patent Document 3).
JP-A-4-147507 JP 2004-179048 A JP 2003-188415 A

  That is, when the conventional light bulb-type emergency lighting device is replaced with an LED-type emergency lighting device, the ambient illuminance is 1 lx when the ambient temperature is normal temperature and lighting is performed with power from the emergency power source. In addition to the above, it is preferable from the viewpoint of safety that the floor surface illuminance is 1 lx or more even in an atmosphere at an ambient temperature of 140 ° C.

  On the other hand, if the control as described in Patent Document 3 is performed in view of the ambient temperature and light output characteristics of the LED, there is a possibility that the current flowing to the LED becomes excessive at a high temperature and the LED is thermally destroyed. For this reason, there is a possibility that reliability for ensuring safety in an emergency cannot be obtained sufficiently. Further, since it is necessary to dispose a temperature sensor or the like to detect the ambient temperature, the number of members increases and a space for disposing a new member must be secured, so that the configuration does not contribute to downsizing. It will be.

  The present invention has been made in view of the above, and an object of the present invention is to provide an emergency lighting device that can ensure safety even when the ambient temperature changes, and can prevent an increase in size.

According to the emergency lighting device of claim 1, the main body of the instrument; the LED light source unit composed of LEDs provided in the main body of the instrument; the emergency power source; and the power supply from the emergency power source when the external power source is abnormal An emergency lighting circuit for lighting an LED with constant current control; and when the LED is turned on by power supply from an emergency power supply, the floor illumination of the light emitted from the LED light source unit is at room temperature Some are characterized by being set to 1.5 lx or more .

  In the present invention and the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified.

  The instrument main body may be an attachment wall that is embedded in, for example, a ceiling surface or a wall surface, or may be directly attached to the ceiling surface or the wall surface, and the configuration and mechanism are not particularly limited.

  The LED only needs to be able to continue lighting in an atmosphere at an ambient temperature of 140 ° C., and any light output (illuminance) in the room temperature atmosphere may be used.

  The emergency power supply is a means for supplying power to the emergency lighting circuit for turning on the LED for a predetermined time, for example, when the external power supply fails or when the emergency power supply is inspected. A double layer capacitor or the like can be used as appropriate.

  Moreover, you may provide the charging circuit which charges an emergency power supply at the time of regular use. The charging circuit rectifies the commercial power supply to obtain a DC voltage, for example, and charges the emergency power supply. Note that the emergency power supply and the charging circuit may be built in the appliance body or may be separately installed.

  The emergency lighting circuit may be provided not only when the external power supply is abnormal, but also when checking the life of the emergency power supply or checking whether or not the light emitting diode is lit.

  The operation of the present invention will be described. In normal use, the emergency power supply is charged through the charging circuit, for example, by supplying power from a commercial power supply.

On the other hand, in the event of an emergency, the power supply to the light source is controlled from the emergency power source, for example, by detection of a power failure detection means, and the power from the emergency power source is constant by constant current control via the emergency lighting circuit. The LED is turned on by supplying current to the LED. And the light radiate | emitted from the LED light source part which consists of LED is irradiated with respect to a floor surface.

At this time, when the ambient temperature is a normal temperature atmosphere, for example, 30 ° C., the floor surface illuminance is set to 1.5 lx or more by the irradiation light from the LED light source unit . In addition, if the floor surface illuminance is 1.5 l x or more, the LED of the LED light source unit may be a single LED or a plurality of LEDs.

  It supplements about this invention. According to the experiments by the present inventor, when the LED is controlled at a constant current, it has been found that the light output is different by about 30 percent when the ambient temperature is 30 ° C. and when the ambient temperature is 140 ° C. Therefore, if a floor surface illuminance of 1.5 lx or more is secured at least in a normal temperature atmosphere, 1 lx of the minimum illuminance can be secured even if the ambient temperature is 140 ° C. Therefore, safety in an emergency can be secured. An emergency lighting device using LEDs can be realized.

  Further, in consideration of LED variations, it is preferable that the temperature is set to 2 lx or more in a normal temperature atmosphere. That is, it is known that the LEDs have individual variations. Therefore, as a result of verifying the degree of variation in LEDs, the inventor of the present application has found that the so-called chip itself has a light output ratio that is different by about 10 percent. Then, it was found that when the chip is further mounted on a substrate, coated with resin and sealed, and coated to form an LED molded product, the light output ratio varies by 20% or more. These variations occur because the electrical characteristics or optical characteristics are individually different due to factors such as the crystals constituting the chip, the amount of sealing resin, and the viscosity of the resin. In other words, when the ambient temperature is normal temperature, the light output decrease rate varies depending on the individual LED when the ambient temperature is 140 ° C. even though the floor illumination is 1.5 lx or more. In some cases, the floor surface illuminance of 1 lx or more may not be ensured. Therefore, in consideration of ensuring safety and LED variation, it is preferable for an emergency lighting device that a floor illumination of 2 lx or more is obtained in a room temperature atmosphere.

  In addition, according to the present invention, the constant current control of the LED does not change the current control due to the difference in ambient temperature, so that complicated control is not required and additional element parts need to be added. There is no. Furthermore, since it can be realized by constant current control, it does not increase the current that flows to the LED when the ambient temperature is high, and it is possible to maintain the lighting of the LED for a long time even when the ambient temperature is high. Become.

The invention according to claim 2 includes : an instrument main body; an LED light source unit comprising an LED provided on the instrument main body; an emergency power source; and a normal lighting circuit that lights the LED by power supply from an external power source during normal use; An emergency lighting circuit for lighting an LED with constant current control by supplying power from an emergency power supply when an external power supply is abnormal. In an emergency lighting device, the LED is turned on by power supply from the emergency power supply. An emergency lighting device, wherein the floor surface illuminance of light emitted from the light source unit is set to 2 lx or more in a normal temperature atmosphere .

In this invention, it has a normal lighting circuit which lights a light source at the time of normal use. The conventional lighting circuit, when causing lit point light source at the time of conventional, may be configured to light up at the lighting level lower lighting level than the light source is lit up with emergency lighting circuit.

According to the present invention, when the LED is lit even during normal use, the floor illuminance is set to 2 lx or more in a normal temperature atmosphere when the LED is lit by power supply from an emergency power supply . In other words, because that using LED is relatively long life than light bulbs as the light source, but can be expected to be used as well for example nightlight during regular, LED intended illuminance is continued use gradually decreases is there. Therefore, when the civil time is also an instrument specifications to be lit, as in view of the reduction in the light output power characteristic changes and long-term use of the light output due to the difference of the ambient temperature, the more 2lx at room temperature atmosphere at the start of use it can be the reliability and safety and a high emergency lighting device that you set.

  Furthermore, considering the variation of LEDs, higher safety and reliability can be obtained by setting the floor surface illumination to be 3 lx or more in a normal temperature atmosphere at the start of use.

  According to the first or second aspect of the present invention, the ambient temperature is 140 ° C. when the floor surface illuminance of 1.5 lx or 2 lx or more is secured at least in a room temperature atmosphere using the constant current control LED. However, since 1 lx of the minimum illuminance is obtained, safety as an emergency lighting device using LEDs can be ensured.

  In addition, by controlling the constant current of the LED, the control of the current does not differ due to the difference in ambient temperature, and no additional element parts need to be added, so that the device itself does not increase in size. .

Furthermore, since it can be realized by constant current control, it does not increase the current that flows to the LED when the ambient temperature is high, and the lighting of the LED can be maintained for a relatively long time even when the ambient temperature is high. since DOO ing, it is possible to ensure the safety of the emergency lighting device.

1 is a bottom view of an emergency lighting apparatus according to an embodiment of the present invention , FIG. 2 is a partial longitudinal sectional view showing a state in which the emergency lighting apparatus of FIG. 1 is arranged on a ceiling surface, and FIG. FIG. 4 is a schematic explanatory diagram showing a circuit configuration of the emergency lighting fixture according to the embodiment of the present invention, and FIG. 5 is a diagram illustrating high-temperature characteristics of the LED of the present embodiment. It is explanatory drawing to do.

As shown in FIGS. 1 and 2 , an emergency lighting device 1 that is an emergency lighting device includes, for example, a cylindrical device body 3 that is embedded in a ceiling surface 2, and FIG. It is designed to illuminate the middle and lower part.

The emergency lighting device 1 is the lower surface 3a of the instrument body 3 facing downward in FIG. 2 of the ceiling surface 2, while projecting the outward flange 4 of the annular integral, the body portion bottom exterior surface of the device body 3 in FIG. 1 A pair of upper and lower belt-like locking springs 5 and 5 are fixed. The emergency lighting fixture 1 is fixed to the ceiling surface 2 by elastically holding the ceiling surface 2 in the vertical direction in FIG. 2 by the pair of locking springs 5 and 5 and the outward flange 4.

As shown in FIG. 1 , the emergency lighting fixture 1 is formed with a concave portion 6 having, for example, a circular irradiation opening 60 that opens downward in FIG. Three LEDs 7 serving as light sources are arranged in the center.

The LED 7 has, for example, a luminous efficiency of 60 lm / W and a long lifetime of 40 to 60,000 hours, and as shown in FIG. 3, a reflector 73 is provided so as to include a chip 72 mounted on a substrate 71, The reflecting plate 73 is formed by filling a sealing resin 75 mixed with a phosphor 74. And three LED7 is used, the LED light source part 8 is formed, and the light from this LED light source part 8 radiate | emits from the irradiation opening 60 of the instrument main body 3 toward the downward direction in FIG. ing.

Also on the lower surface 3a of the device body 3 as shown in FIG. 1, on the opposite side of the light emitting diode 7, and arranged the bus Tteri compartment 9, the battery compartment 9 is covered by a lid 13 ing.

In FIG. 2 , reference numeral 15 denotes a power terminal block, and reference numeral 16 denotes an inspection button. When the check button 16 is turned on, a checkout circuit, which will be described later, gives a blackout signal simulating an external power failure to the blackout detection circuit to determine whether the light-emitting diode 7 is lit for a specified time when the external power supply is cut off. It is a push button switch for checking.

FIG. 4 is a block diagram showing an electrical configuration of the emergency lighting apparatus 1. As shown in FIG. 4 , the emergency lighting apparatus 1 has a power failure detection circuit 17, a charging circuit 18, and a regular lighting circuit 19 connected to a power terminal block 15 connected to an external power source such as a commercial power source (not shown). .

When the power failure detection circuit 17 detects that the voltage of the external power supply applied to the power supply terminal block 15 is below a predetermined value for a predetermined time, it gives a power failure detection signal to the lighting control unit 21 as a power failure of the external power supply has occurred. Is.

  The charging circuit 18 converts alternating current from an external power source into direct current having a predetermined voltage, and supplies power to the battery 10 for charging. An emergency lighting circuit 20 is connected to the battery 10.

  The emergency lighting circuit 20 is a circuit for lighting the light emitting diode 7 with a constant current by using the battery 10 as a power source in the event of a power failure of the external power source.

  The normal lighting circuit 19 turns on the light emitting diode 7 at a lighting level lower than that in the emergency lighting by converting the alternating current of the external power source into a predetermined voltage direct current when the external power source is normally fed to the power terminal block 15. Circuit. Thereby, for example, it is turned on as a night light or the like with an illuminance of about 0.2 to 0.3 lx. The regular lighting circuit 19 includes a path for supplying an alternating current of an external power source to the lighting control unit 21 described later, in addition to a path for supplying a direct current to the light emitting diode 7.

  The regular lighting circuit 19 and the emergency lighting circuit 20 are connected to the light emitting diode 7 via the lighting control unit 21.

  The lighting control unit 21 connects the light emitting diode 7 to the regular lighting circuit 19 during normal operation when the external power supply is normal, while detecting a power failure from the power failure detection circuit 17 that detects the power failure during an emergency such as a power failure of the external power supply. Upon receiving the signal, the light emitting diode 7 is switched from the regular lighting circuit 19 to the emergency lighting circuit 20 and connected, and the connection is held for the predetermined time or more.

  Here, the emitted light which is emitted from the LED light emitting unit 8 of the present embodiment and is emitted from the irradiation opening 60 will be described.

The floor illuminance of the light emitted from the LED light emitting unit 8 of the present embodiment and emitted from the irradiation opening 60 is 1.5 l x or more when the ambient temperature is a normal temperature atmosphere of 30 ° C., for example. In addition, it is configured to be 2 lx or more.

  This is found from the high temperature characteristics of the LED 7 shown in FIG. FIG. 5 shows the results of experiments on differences in the characteristics of the LEDs 7 due to differences in the ambient temperature Ta. The conditions of this experiment are set so that the current flowing through the LED 7 is constant at each ambient temperature Ta.

  The results shown in FIG. 5 show that the illuminance decreases as the ambient temperature Ta increases. Furthermore, when Ta is 30 ° C. and Ta is 140 ° C., the light output differs by about 30 percent.

  From the above results, if the floor surface illuminance of 1.5 lx or more is secured at least at ambient temperature in a normal temperature atmosphere, the floor surface illuminance can be 1 lx or more even if the ambient temperature is 140 ° C. Even when the LED 7 is used, the emergency lighting apparatus 1 with high safety can be realized.

  Moreover, in this embodiment, it is set as the specification which can light LED7 also at the time of regular use. As a result, since it can be used as a night light even during normal use, it is advantageous in that it can be used for a wide range of applications, so that versatility is improved. To do. In other words, when the aged use is not taken into account, the floor illuminance of 1 lx can be secured when the ambient temperature at the initial time is 140 ° C., but there is a possibility that the floor illuminance becomes 1 lx or less after the aged use. Therefore, in the case of the present embodiment, which can be turned on even during normal use, since it is set to be 2 lx or more at an ambient temperature of 30 ° C. in the initial stage at the start of use, even after a lapse of time. The floor illuminance of 1 lx can be ensured at a high temperature, and the emergency lighting apparatus 1 having high reliability and safety can be obtained.

  Further, according to the present embodiment, the constant current control of the LED 7 does not change the current control due to the difference in the ambient temperature Ta, and does not require complicated control, and additional component parts There is no need to add. Therefore, the merit that it is possible to reduce the size by using the LED 7 is not impaired.

  Furthermore, since it can be realized by constant current control, the current flowing to the LED 7 is not increased in order to ensure illuminance when the ambient temperature Ta is high, so even if the ambient temperature Ta is high, the LED 7 Lighting can be maintained for a long time, and as a result, lighting can be maintained for a predetermined time, for example, 30 minutes.

In addition, when several LED7 is used, dispersion | variation arises in each LED7. This, for example, a chip 72 made of gallium night Lai de and the electrode, the variation due to conditions differences in the case of forming the dispersion and tip of the crystal and the electrodes themselves, 10% before and after possible light output ratio of each LED7 different There is sex. Further, since the chip 72 is mounted on the substrate 71 and the sealing resin 75 is charged, factors such as a difference in the sealing resin amount in the coating process, a difference in the viscosity of the resin, and a difference in the phosphor amount occur. In the case of a molded product, the light output ratio of each LED 7 may be different by 20% or more. Therefore, in this embodiment, the light output decrease rate when the ambient temperature Ta becomes 140 ° C. varies depending on the individual LED 7, and when this variation is large, in consideration of ensuring safety in an emergency, the ambient temperature atmosphere You may make it obtain the floor surface illumination of 3 lx or more at 30 degreeC inside.

  Moreover, when using several LED7, it can also be used combining LED7 from which the degree of dispersion | variation differs. For example, an LED whose light output value is substantially a reference value is classified as a medium level, a light output value larger than the medium level is classified as a large level, and a light output value smaller than the medium level is classified as a small level. To do. For example, when three LEDs 7 are used, the LED light source unit 8 is formed by selecting one each from the large level, the medium level, and the small level. According to this, since it can suppress efficiently that a floor surface illumination intensity differs for every some emergency lighting fixture 1, there is no dispersion | variation in the illumination intensity between fixtures at the time of emergency.

The bottom view of the emergency lighting fixture of embodiment of this invention Partial longitudinal cross-sectional view showing a state where the emergency lighting apparatus of FIG. 1 is arranged on the ceiling surface Explanatory drawing which shows LED of the emergency lighting fixture of FIG. Schematic explanatory drawing which shows the circuit structure of the emergency lighting fixture which concerns on embodiment of this invention Explanatory drawing explaining the high temperature characteristic of LED of this embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Emergency lighting fixture, 3 ... Appliance main body, 7 ... LED, 8 ... LED light source part, 10 ... Battery which is an emergency power supply, 19 ... Regular lighting circuit, 20 ... Emergency lighting circuit

Claims (2)

An instrument body;
An LED light source unit composed of LEDs provided in the instrument body;
Emergency power supply;
An emergency lighting circuit for lighting the LED with constant current control by supplying power from the emergency power supply when the external power supply is abnormal;
In an emergency lighting device comprising:
An emergency lighting device, wherein the floor illumination of the light emitted from the LED light source unit is set to 1.5 lx or more in a normal temperature atmosphere when the LED is turned on by power supply from the emergency power source. An instrument body;
An LED light source unit composed of LEDs provided in the instrument body;
Emergency power supply;
A normal lighting circuit for lighting an LED by supplying power from an external power source during normal use;
An emergency lighting circuit for lighting the LED with constant current control by supplying power from the emergency power supply when the external power supply is abnormal;
In an emergency lighting device comprising:
An emergency lighting device characterized in that, when an LED is turned on by power supply from an emergency power source, the floor illuminance of light emitted from the LED light source unit is set to 2 lx or more in a normal temperature atmosphere.

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