JP5530264B2 - Emergency lighting equipment - Google Patents

Description

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

  In recent years, light-emitting diodes (hereinafter referred to as LEDs), which are semiconductor light-emitting elements with long life and low power consumption, have been adopted as light sources for emergency lighting devices such as guide lights and emergency lights in place of light bulbs with filaments. ing. However, the LED generates a relatively large amount of heat when it is turned on, and there is a problem that the light emission efficiency of the LED decreases due to the temperature rise due to the heat generated by the LED itself, and a predetermined illuminance cannot be obtained.

  In view of this, there has been provided an illumination device that uses an LED as a light source and has improved heat dissipation (for example, Patent Document 1). FIG. 2 shows a partially cutaway side view of the illumination device of Patent Document 1. FIG. The illumination device of Patent Document 1 includes a substrate 101, an LED 102, a lighting circuit component 103, a heat conductive graphite 104, a heat radiator 105, an instrument body 106, a silicon resin 107, and a cover 108. The heat generated from the LED 102 mounted on the substrate 101 is conducted to the thermally conductive graphite 104 provided so as to be in contact with the lead wire 102a of the LED 102. This heat is conducted to the heat radiating body 105 or the instrument main body 106 provided directly or indirectly on the heat conductive graphite 104 and is radiated to the outside, thereby suppressing the temperature rise of the LED 102.

  Further, in an emergency lighting device using a light bulb, it is stipulated that the light bulb continues to be lit for 30 minutes when the power of the emergency power supply is supplied and the floor illuminance of 1 lx or more is continuously maintained when the ambient temperature is normal temperature. . Further, it is specified that lighting can be continued for 30 minutes even in an atmosphere having an ambient temperature of 140 ° C.

  Then, in order to satisfy said prescription | regulation, the emergency illuminating device provided with the heat insulating material in the instrument main body is provided (for example, patent document 2). FIG. 3 shows a partially cutaway side view of the emergency lighting device of Patent Document 2. As shown in FIG. The emergency lighting device of Patent Document 2 includes a main body 201, an LED 202, a heat exchange means 204 having a heat exchange medium 203, a heat insulating member 205, a storage battery 206, and a circuit block 207. Heat generated by the lighting of the LED 202 is absorbed by the heat exchange medium 203 and radiated to the outside by the heat exchange means 204. Furthermore, since the heat exchanging means 204 and the LED 202 are shielded from the outside air by the heat insulating member 205, even when the ambient temperature becomes high due to a fire, the temperature rise of the LED 202 is suppressed to prevent the light emission efficiency from being lowered. A predetermined illuminance can be ensured.

JP 2003-100110 A JP 2006-54077 A

  However, the illumination device of Patent Document 1 requires the heat conductive graphite 104 and the heat radiating body 105 for radiating the heat generated by the lighting of the LEDs 102 to the outside. Further, the emergency lighting device of Patent Document 2 also requires the heat exchanging means 204 for radiating the heat generated by the lighting of the LEDs 202 to the outside. Therefore, there existed a problem that the enlargement of the apparatus by the increase in a number of parts and the external appearance design were impaired.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide an emergency lighting apparatus capable of maintaining heat dissipation and reducing the size and weight of the apparatus and improving the appearance design. It is in.

  The emergency lighting apparatus according to the present invention includes a light emitting diode, a rechargeable emergency power supply, a charging unit that charges the emergency power supply by supplying power from the commercial power supply, and an emergency power supply as an input during a power failure of the commercial power supply. A lighting unit for lighting the diode, a light emitting diode is mounted on one side, a first substrate on which the charging unit is mounted on the other side, a second substrate on which the lighting unit is mounted, and one end opened; A first board, a second board, and an instrument main body that accommodates an emergency power source therein, the first board facing one end of the instrument main body and covering the opening of the instrument main body. The second board and the emergency power supply are provided on the other end side of the instrument body with respect to the first board.

  In this emergency lighting apparatus, it is preferable that the apparatus main body is formed in a cylindrical shape, and the dimension in both end directions is shorter than the diameter at one end.

  As described above, according to the present invention, there is an effect that heat dissipation can be maintained, the apparatus can be reduced in size and weight, and the appearance design can be improved.

It is sectional drawing which shows schematic structure of the emergency lighting fixture of embodiment of this invention. It is a partial cross section figure which shows the structure of the illuminating device of patent document 1. It is a partial cross section figure which shows the structure of the emergency illuminating device of patent document 2. FIG.

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

(Embodiment)
FIG. 1 is a cross-sectional view showing a schematic configuration of the emergency lighting apparatus of the present embodiment. The emergency lighting fixture of this embodiment is a so-called ceiling-mounted emergency lighting fixture, and the fixture body 8 is attached to the ceiling 9 to irradiate the lower floor surface. The emergency lighting apparatus of the present embodiment includes a light source 1, an LED board 2 (first board), an emergency power supply 3, a charging unit 4, a lighting unit 5, a power supply board 6 (second board), and a connection line 7. It is comprised with the instrument main body 8. FIG.

  The instrument body 8 is formed in a circular bottomed cylindrical shape having an open bottom surface, and is attached so that the top surface faces the ceiling 9. Further, the LED substrate 2 is provided so as to cover the opening at the lower end of the instrument body 8, and a light-transmitting cover 8 a is provided below the LED substrate 2.

  The LED substrate 2 uses a metal substrate formed of aluminum or copper as a base material, the light source 1 is mounted on the lower surface, and the charging unit 4 is mounted on the upper surface.

  The power supply substrate 6 is provided so that the surface direction is substantially parallel to the vertical direction of the instrument body 8. That is, the power supply substrate 6 is provided so that the surface direction of the power supply substrate 6 is orthogonal to the surface direction of the LED substrate 2 and the power supply substrate 6 is positioned above the LED substrate 2. The lighting unit 5 is mounted on one surface side of the power supply substrate 6.

  The LED board 2 and the power supply board 6 are connected via a connection line 7. One end of the connection line 7 is connected to a connector 6b provided below the one surface side of the power supply substrate 6 and the other end is connected to the upper surface of the LED substrate 2 with solder or the like, so that the LED substrate 2 and the power supply substrate 6 Are electrically connected.

  The light source 1 includes a plurality of LEDs 1a (light emitting diodes) and is mounted on the lower surface of the LED substrate 2.

  The emergency power supply 3 is provided in the upper part of the appliance main body 8 and is composed of a rechargeable secondary battery such as nickel hydride or a power storage element such as an electric double layer capacitor.

  The charging unit 4 is mounted on the upper surface of the LED board 2 and charges the emergency power supply 3 by supplying power from a commercial power supply AC connected via a connector 6a mounted on one upper side of the power supply board 6. . In general, trickle charging suitable for backup use is generally used as a charging method for the emergency power supply 3 provided in the emergency lighting apparatus, and the charging unit 4 always causes a small current to flow through the emergency power supply 3. Continue to maintain a fully charged state.

  When the lighting unit 5 detects a power failure of the commercial power supply AC, the lighting unit 5 turns on the LED 1a using the emergency power source 3 as a power source. The power output from the lighting unit 5 at the time of a power failure of the commercial power supply AC is supplied to the LED 1a via the connection line 7, and the LED 1a is lit.

  With the above configuration, in the emergency lighting apparatus of the present embodiment, when the power is supplied from the commercial power source AC (hereinafter referred to as energization), the lighting unit 5 stops and the charging unit 4 operates to operate the emergency power source 3. To charge. On the other hand, at the time of a power failure of the commercial power supply AC, the charging unit 4 stops and the lighting unit 5 operates to light the LED 1a. Therefore, the operating part differs between when the commercial power supply AC is energized and during a power failure, and therefore the heat generation source due to the operation differs. That is, when the commercial power supply AC is energized, the charging unit 4 becomes a heat source by the charging operation, the lighting unit 5 is stopped, and the LED 1a is turned off. Therefore, the lighting unit 5 and the LED 1a are not a heat source. At the time of a power failure of the commercial power supply AC, the lighting unit 5 and the LED 1a become a heat source due to the lighting of the LED 1a by the lighting operation of the lighting unit 5, and the charging unit 4 is stopped.

  Therefore, the emergency lighting fixture of the present embodiment improves heat dissipation by utilizing the fact that the heat source is different between when the commercial power supply AC is energized and during a power failure.

  First, the heat dissipation of the charging unit 4 when the commercial power supply AC is energized will be described.

  When the commercial power supply AC is energized, the heat generated from the charging unit 4 is radiated to the outside using the LED substrate 2. Since the base material of the LED substrate 2 is formed of a metal substrate, the LED substrate 2 has a large heat capacity and high heat dissipation. Further, when the commercial power supply AC is energized, the LED 1a is turned off and does not serve as a heat source, so the temperature of the LED substrate 2 is kept substantially equal to the ambient temperature. Therefore, the heat generated from the charging unit 4 can be efficiently radiated to the outside via the LED substrate 2. In addition, if the base material of LED board 2 is formed with the material with a large heat capacity, the said effect can be acquired and it is not limited to a metal substrate.

  As described above, since the charging unit 4 is mounted on the upper surface of the LED substrate 2, the LED substrate 2 and the charging unit 4 are thermally tightly coupled, and the heat dissipation of the charging unit 4 can be improved.

  In addition, the expected life of the life-limited parts such as the electrolytic capacitor and the winding parts constituting the charging unit 4 is determined by the use temperature. However, in this embodiment, since the temperature rise of the charging unit 4 can be suppressed, the life of the charging unit 4 can be extended, and the design life of the emergency lighting apparatus can be extended.

  Next, the heat dissipation of the LED 1a during a power failure of the commercial power supply AC will be described.

  At the time of a power failure of the commercial power supply AC, heat generated by the lighting of the LED 1a is radiated to the outside using the LED substrate 2 formed of metal and having high heat dissipation. Further, since the operation of the charging unit 4 is stopped and the temperature is low, the circuit components constituting the charging unit 4 can also be used as the heat radiating member of the LED 1a, and the heat capacity of the LED substrate 2 is substantially increased. Therefore, the heat dissipation of the LED 1a can be further improved and the temperature rise can be suppressed, so that a predetermined illuminance can be obtained.

  The lighting unit 5 is mounted on a power supply substrate 6 that is configured separately from the LED substrate 2. Further, the lighting unit 5 and the emergency power source 3 are located above the instrument body 8 and are away from the LED board 2. Therefore, the lighting unit 5 and the emergency power source 3 and the LED 1a are thermally loosely coupled to each other, and the heat generated from the lighting unit 5 and the emergency power source 3 is not easily transmitted to the LED 1a mounted on the LED board 2. Therefore, the influence of the heat to LED1a by the lighting part 5 and the emergency power supply 3 can be suppressed.

  As described above, the emergency lighting fixture of the present embodiment maintains heat dissipation by intentionally providing a location where each component member is thermally tightly coupled and a location where the component members are loosely coupled to each other. Since there is no need to use a member, the number of parts can be reduced. Therefore, it is possible to reduce the size and weight of the emergency lighting fixture and improve the appearance design.

  In addition, in a direct lighting type lighting fixture, particularly an emergency lighting fixture in which the emergency power source 3 is housed in the fixture main body 8, it is desired to shorten the projecting dimension from the ceiling 9. Therefore, the instrument body 8 of the present embodiment is formed so that the total length L2 of the cylinder is shorter than the diameter L1 of the cylinder. Thereby, the area of the LED substrate 2 can be increased, and the heat capacity of the LED substrate 2 can also be increased. Therefore, the heat dissipation of the emergency lighting fixture can be improved, and the temperature rise can be further suppressed.

  Further, by shortening the overall length L2 of the instrument body 8, the projecting dimension from the ceiling 9 can be shortened and the appearance can be improved.

  In addition, if the emergency power supply 3 is housed in a horseshoe-shaped case, for example, the space in the instrument body 8 can be used effectively.

1 Light source 1a LED
2 LED board 3 Emergency power supply 4 Charging part 5 Lighting part 6 Power supply board 7 Connection line 8 Appliance body 9 Ceiling

Claims (2)

A light emitting diode;
Rechargeable emergency power supply,
A charging unit that charges the emergency power supply by supplying power from a commercial power supply;
A lighting part for lighting the light emitting diode with the emergency power supply as an input at the time of a power failure of a commercial power supply,
A first substrate on which the light emitting diode is mounted on one side and the charging unit is mounted on the other side;
A second substrate on which the lighting unit is mounted;
One end is opened, and includes an instrument body that houses the first substrate, the second substrate, and the emergency power source inside,
The first substrate is provided so that one surface faces one end direction of the instrument body and covers the opening of the instrument body,
The emergency lighting apparatus, wherein the second board and the emergency power source are provided on the other end side of the apparatus body with respect to the first board.   The emergency lighting apparatus according to claim 1, wherein the main body is formed in a cylindrical shape, and has a dimension in both end directions shorter than a diameter at one end.

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