JP2010140764A - Illuminating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination device capable of suppressing reduction of light output at low temperatures regardless of the kind of hot-cathode light source or an electrodeless light source, and without reducing efficiency of light output at room temperature and high temperatures. <P>SOLUTION: This fixture is equipped with the fixture body 1, the main light source 2 composed of a hot-cathode type discharge lamp, the main lighting device 3 to supply lighting electric power to the main light source 2 by receiving electric power from a commercial power supply, an auxiliary light source 4 composed of a light-emitting diode, an auxiliary lighting device 5 to supply lighting electric power to the auxiliary light source 4 by receiving electric power from the commercial power supply, and a thermo switch 6 to control open-close of a power feeding route to the auxiliary lighting device 5 from the commercial power supply according to atmospheric temperature of a space in which the fixture body 1 is installed, and the thermo switch 6 closes a contact in the case the temperature has a prescribed threshold value or less, and opens the contact in the case the temperature has more than the prescribed threshold value. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lighting device using a hot cathode light source such as a hot cathode discharge lamp or an electrodeless light source such as an electrodeless discharge lamp as a main light source.

  2. Description of the Related Art Conventionally, lighting fixtures using a hot cathode light source such as a hot cathode type discharge lamp or an electrodeless light source such as an electrodeless discharge lamp as a main light source have been provided. In the conventional example described in Patent Document 1, a wall surface near a ceiling in a tunnel is attached as a construction surface, a lamp socket to which a hot-cathode type single-tube fluorescent lamp is attached, and A fixture body having a reflector that reflects light from the fluorescent lamp and a lighting device that supplies lighting power to the fluorescent lamp through a lamp socket, and a light extraction opening provided for taking out light to the outside in the fixture body And a transparent cover for covering. In addition, the light extraction opening of the instrument main body is sealed with a light-transmitting cover, and has a jet-proof type so that no harmful influence is produced even if a direct jet flow from any direction is received.

Here, as shown in FIG. 2 (a), the light output of the hot cathode fluorescent lamp depends on the ambient temperature and has a characteristic that the light output greatly decreases in a low temperature region. Therefore, it is necessary to suppress the decrease in light output. Therefore, in the above conventional example, paying attention to the fact that the ambient temperature of the discharge lamp corresponds to the coldest point, that is, the temperature of the end opposite to the base of the discharge lamp, the end of the discharge lamp and the fixture body A packing made of a heat insulating material is provided between members provided inside. With this configuration, air convection in the vicinity of the end portion of the discharge lamp can be prevented, and heat transfer due to air convection at the coldest spot of the discharge lamp can be greatly reduced. Thus, no heat is dissipated due to heat transfer at the coldest spot of the discharge lamp, and the temperature of the coldest spot can be increased compared to the case where no packing is provided, and the light output at low temperatures can be increased. The decrease can be suppressed.
JP 2004-206888 A

  However, in the above-described conventional example, an effect of suppressing a decrease in light output at low temperatures is exhibited for the first time by providing a packing at the end opposite to the base side of the fluorescent lamp of the single base. There was a problem that packing could not be applied to other types of light sources such as fluorescent lamps, and the types of hot cathode light sources or electrodeless light sources were limited. In addition, since the above conventional example aims only at improving the light output efficiency at a low temperature, the light output efficiency at a normal temperature or a high temperature may be lowered.

  The present invention has been made in view of the above points, and does not depend on the type of the hot cathode light source or the electrodeless light source, and does not reduce the light output efficiency at normal temperature and high temperature, and the light output at low temperature. It aims at providing the illuminating device which can suppress the fall of this.

  In order to achieve the above object, the first aspect of the present invention is a main lighting for supplying lighting power to a main light source by receiving power from an instrument body, a main light source comprising a hot cathode light source or an electrodeless light source, and an external power source. Auxiliary light source consisting of a device, a light emitting diode, an auxiliary lighting device that receives power from an external power source and supplies lighting power to the auxiliary light source, and auxiliary lighting from an external power source according to the ambient temperature of the space where the fixture body is installed Control means for controlling the opening and closing of the power supply path to the apparatus, the control means closes the power supply path when the ambient temperature is equal to or lower than a predetermined threshold, and the ambient temperature is higher than the predetermined threshold Is characterized in that a feeding path is opened.

  According to a second aspect of the present invention, in the first aspect of the invention, the light source unit includes a plurality of light source units other than the control means, and the control means collectively opens and closes the power supply path from the external power source to the auxiliary lighting device of each light source unit. It is characterized by controlling.

  The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, the predetermined threshold value is set in a region where the light output decreases as the temperature decreases in the light output characteristics of the main light source.

  According to the first aspect of the present invention, a main light source composed of a hot cathode light source or an electrodeless light source whose light output is reduced in a low temperature region and an auxiliary light source composed of a light emitting diode whose light output is increased in a low temperature region are combined. By turning on the auxiliary light source, it is possible to suppress a decrease in light output at a low temperature regardless of the type of the hot cathode light source or the electrodeless light source. Further, since the auxiliary light source is turned on only at a low temperature and only the main light source is turned on at a normal temperature and a high temperature, the efficiency of light output at a normal temperature and a high temperature does not decrease. Furthermore, the auxiliary light source can be switched on / off automatically according to the ambient temperature of the space where the fixture body is installed, so that the light output can be stabilized even when there is no person operating the lighting device, such as at night. Can be controlled.

  According to the invention of claim 2, since it is possible to collectively control the lighting / non-lighting of the auxiliary light sources of the plurality of light source units, the cost is reduced as compared with the case where the control means is provided in each light source unit. In addition, maintenance can be easily performed when the control means fails.

  According to the invention of claim 3, by turning on the auxiliary light source in a temperature range where the light output of the main light source decreases, the light output of the main light source and the auxiliary light source of the auxiliary light source are independent of the ambient temperature of the space in which the fixture body is installed. Since the sum with the light output can be made substantially constant, it is possible to produce an illumination space in which the visibility is constant.

(Embodiment 1)
Hereinafter, Embodiment 1 of the lighting device according to the present invention will be described with reference to the drawings. In this embodiment, as shown in FIG. 1, the main light source receives power from an instrument body 1, a main light source 2 composed of a hot cathode light source or an electrodeless light source, and a commercial power source (not shown) as an external power source. A main lighting device 3 for supplying lighting power to 2, an auxiliary light source 4 composed of a light emitting diode, an auxiliary lighting device 5 for receiving lighting power from a commercial power source and supplying lighting power to the auxiliary light source 4, and installation of the appliance body 1 And a thermo switch 6 which is a control means for controlling the opening and closing of the power supply path from the commercial power source to the auxiliary lighting device 5 in accordance with the ambient temperature of the space to be operated.

  The instrument main body 1 is formed in a box shape from a metal material and has an opening on one surface. For example, a wall surface near the ceiling in the tunnel is attached as a construction surface. The opening is covered with a translucent cover (not shown) made of a translucent material, and light from the main light source 2 and the auxiliary light source 4 is irradiated to the outside through the translucent cover. . Further, the instrument body 1 is hermetically sealed by covering the opening with a light-transmitting cover, and in the same manner as in the conventional example, the apparatus body 1 has a jet-proof type so that no harmful effect is produced even if a direct jet flow from any direction is received. ing.

  The main light source 2 is composed of, for example, a hot cathode type discharge lamp or an electrodeless discharge lamp, and a hot cathode type discharge lamp is adopted in this embodiment. Examples of the discharge lamp include a single-tube straight tube discharge lamp, a double-tube straight tube discharge lamp, an annular discharge lamp, and a spiral discharge lamp similar to the conventional example. Any discharge lamp may be adopted in the form. The auxiliary light source 4 is formed by mounting one or more white light emitting diodes on a substrate (not shown), for example. Of course, the auxiliary light source 4 is not limited to the above configuration, and may have another configuration.

  The main lighting device 3 includes a rectifier circuit (not shown) that rectifies an AC voltage from a commercial power supply, a booster circuit (not shown) that steps down and smoothes a pulsating voltage output from the rectifier circuit, and a high frequency A polarity inversion circuit (not shown) that includes one or a plurality of switching elements (not shown) that are switched in the circuit and that periodically inverts the polarity of the output voltage from the booster circuit to output a high-frequency voltage; It consists of a resonance circuit (not shown) for applying a high-frequency voltage from the circuit to light the main light source 2 by a resonance action. Since each of the above circuits is conventionally known, detailed description thereof will be omitted here. The configuration of the main lighting device 3 is not limited to the above, and other configurations may be used as long as the discharge lamp as the main light source 2 can be lit. The auxiliary lighting device 5 includes a rectifier circuit (not shown) that rectifies an AC voltage from a commercial power source, and a step-down circuit (step shown) that steps down and smoothes the pulsating voltage output from the rectifier circuit and applies it to the auxiliary light source 4. Not shown). Since each of the above circuits is conventionally known, detailed description thereof will be omitted here. In addition, the configuration of the auxiliary lighting device 5 is not limited to the above, and other configurations may be used as long as the light emitting diode that is the auxiliary light source 4 can be lit.

  The thermo switch 6 is a bimetal type thermo switch that includes a bimetal whose bending state is reversed according to temperature and opens and closes a contact according to the reversing operation of the bimetal. Be placed. When the temperature is equal to or lower than a predetermined threshold, the contact is closed, that is, the power supply path is closed, and when the temperature is higher than the predetermined threshold, the contact is opened, that is, the power supply path is opened. . In the present embodiment, the bimetal thermoswitch 6 is adopted as the control means, but other configurations may be used as long as the contacts are opened and closed according to the temperature.

  Here, as in the conventional example, the main light source 2 composed of a hot cathode type discharge lamp has a characteristic that the light output depends on the ambient temperature, and the light output greatly decreases in the low temperature region (FIG. 2). (See (a)). On the other hand, the light output of the auxiliary light source 4 made of a light-emitting diode also depends on the ambient temperature, but the light output decreases as the temperature increases, that is, the light output is relatively lower in the low temperature region than in the high temperature region. The main light source 2 has a characteristic different from that of the main light source 2 (see FIG. 2B). Therefore, in the present embodiment, the light output characteristic of the main light source 2 is a region where the light output decreases as the temperature decreases, and the ambient temperature at which the light output of the main light source 2 decreases to a predetermined magnitude or more is set to a predetermined value. If the temperature of the thermoswitch 6 is equal to or lower than the predetermined threshold, the contact is closed and the auxiliary light source 4 is turned on. Thus, as shown in FIG. 1B, in the low temperature region below a predetermined threshold, the overall light output is the light output of the main light source 2 (see the broken line a) and the light output of the auxiliary light source 4. (Refer to the broken line (a) in the figure), the decrease in the light output of the main light source 2 at low temperatures can be compensated by the light output of the auxiliary light source 4 (see the solid line (c) in the figure). When the temperature of the thermoswitch 6 is higher than a predetermined threshold, the contact is opened, so that the auxiliary light source 4 is not turned on and only the main light source 2 is turned on.

  As described above, the main light source 2 composed of a hot cathode light source or an electrodeless light source whose light output decreases in a low temperature region and the auxiliary light source 4 composed of a light emitting diode whose light output increases in a low temperature region are combined to provide an auxiliary light source at low temperatures. By turning on 4, it is possible to suppress a decrease in light output at low temperatures. In this embodiment, the main light source 2 does not have to be limited to a single-tube straight tube discharge lamp as in the conventional example, and the main light source 2 is selected regardless of the type of hot cathode light source or electrodeless light source. can do. In addition, since the auxiliary light source 4 is turned on only at a low temperature and only the main light source 3 is turned on at a normal temperature and a high temperature, the efficiency of light output at a normal temperature and a high temperature does not decrease. Furthermore, since the auxiliary light source 4 can be automatically switched on / off according to the ambient temperature of the space in which the fixture body 1 is installed, the light output is stable even when there is no person operating the lighting device, such as at night. Can be controlled.

  In addition, by turning on the auxiliary light source 4 in a temperature range where the light output of the main light source 2 decreases, the light output of the main light source 2 and the light output of the auxiliary light source 4 are independent of the ambient temperature of the space in which the fixture body 1 is installed. Can be made substantially constant, so that an illumination space with constant visibility can be produced.

(Embodiment 2)
Hereinafter, Embodiment 2 of the lighting device according to the present invention will be described with reference to the drawings. However, since the basic configuration of this embodiment is the same as that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, as shown in FIG. 3, a plurality of (three in the drawing) light source units A including a main light source 2, a main lighting device 3, an auxiliary light source 4, and an auxiliary lighting device 5 in the instrument main body 1, and a light source A sensor 60 for detecting the ambient temperature of the space in which the unit A is installed, a switch 61 inserted between the auxiliary lighting device 5 of each light source unit A and the external power source, and a switch 61 according to the detection result of the sensor 60 And a control device 6 which is a control means having a switching unit 62 for switching on / off. The control device 6 is disposed outside the light source unit A.

  The sensor 60 of the control device 6 is composed of, for example, a thermistor, detects the ambient temperature of the space where each light source unit A is installed, and outputs an electrical signal corresponding to the detection result to the switching unit 62. The switch 61 is composed of, for example, an electromagnetic relay, and is switched on / off according to a control signal from the switching unit 62. The switching unit 62 includes, for example, a microcomputer, and outputs a control signal to the switch 61 according to an electrical signal from the sensor 60, that is, according to a temperature detected by the sensor 60, and switches the switch 61 on / off. When the temperature detected by the sensor 60 falls below a predetermined threshold, the switching unit 62 turns on the switch 61 to close the power supply path from the commercial power source to each auxiliary lighting device 5 and turn on the auxiliary light source 4. I am doing so. When the temperature detected by the sensor 60 is higher than a predetermined threshold, the switching unit 62 switches off the switch 61, so that the auxiliary light source 4 is not turned on and only the main light source 2 is turned on.

  In other words, the present embodiment is characterized in that one controller 6 switches on / off of the auxiliary light sources 4 in the plurality of light source units A, and collectively controls the supply of lighting power to the plurality of auxiliary light sources 4. can do. Thus, the cost can be reduced compared to the case where the control device 6 is provided in each light source unit A. Further, in the case where the control device 6 is provided in each light source unit A, when the control device 6 breaks down, maintenance must be performed for each light source unit A, and there is a problem that maintenance becomes complicated. In the case where the single control device 6 performs the collective control as in the present embodiment, maintenance when the control device 6 breaks down can be easily performed. In the present embodiment, the control device 6 is employed as the control means, but the thermo switch 6 may be employed as in the first embodiment.

It is a figure which shows Embodiment 1 of the illuminating device based on this invention, (a) is a block diagram, (b) is operation | movement explanatory drawing. (A) is a correlation diagram of the light output and ambient temperature in a discharge lamp, (b) is a correlation diagram of the light output and ambient temperature in a light emitting diode. It is a block diagram which shows Embodiment 2 of the illuminating device which concerns on this invention.

Explanation of symbols

1 Instrument body 2 Discharge lamp (main light source)
3 Main lighting device 4 Light emitting diode (auxiliary light source)
5 Auxiliary lighting device 6 Thermo switch (control means)

Claims (3)

  The main body of the instrument, a main light source composed of a hot cathode light source or an electrodeless light source, a main lighting device that receives power from an external power source and supplies lighting power to the main light source, an auxiliary light source composed of a light emitting diode, and an external power source An auxiliary lighting device that receives power and supplies lighting power to the auxiliary light source, and a control unit that controls opening and closing of a power supply path from the external power source to the auxiliary lighting device according to the ambient temperature of the space in which the fixture body is installed The control device closes the power supply path when the ambient temperature is equal to or lower than a predetermined threshold, and opens the power supply path when the ambient temperature is higher than the predetermined threshold.   2. The illumination according to claim 1, comprising a plurality of light source units each including parts other than the control means, wherein the control means collectively controls opening and closing of a power feeding path from an external power source to the auxiliary lighting device of each light source unit. apparatus.   The lighting device according to claim 1, wherein the predetermined threshold is set in a region where the light output decreases as the temperature decreases in the light output characteristics of the main light source.

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