JP2006278238A - Lamp lighting device and luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that in a lamp lighting device suppressing deterioration of a lamp (discharge lamp) by the lamp lighting device, deterioration of a component of a luminaire cannot be prevented, and service life of the luminaire cannot be prolonged. <P>SOLUTION: In this lamp lighting device 1, a lighting control circuit 5 integrates energizing time measured by a timer circuit 10 by increasing/decreasing from actual measurement time according to temperature difference between prescribed set temperature of the component or the lamp 8 and temperature measured by a temperature sensor 9, compares the integrated energizing time and the prescribed set time, and outputs a signal for turning off the lamp 8 to the lighting circuit 2 when the integrated energizing time reaches the prescribed set time. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lamp lighting device that is installed in a lighting fixture body and lights a fluorescent lamp, an LED, and the like, and a lighting fixture using the same.

  In conventional lamp lighting devices, power is limited when starting a lighting circuit that receives a high-frequency voltage of an inverter circuit, and an excessive loss is suppressed from being applied to the electrode of the discharge lamp. There is one that suppresses the deterioration of the discharge lamp by limiting the power applied to the electrode and reducing electrode damage (see, for example, Patent Document 1).

JP 2004-349228 A (2nd page, 3rd page, FIG. 1)

  The lamp lighting device of Patent Document 1 suppresses the deterioration of the lamp (discharge lamp) by the lamp lighting device, and prevents a malfunction due to use after the life of the lighting fixture to which the lamp lighting device is attached. It is not intended to prevent deterioration or extend life.

An object of the present invention is to prevent a failure of a lighting fixture to which a lamp lighting device is attached. The life of the lighting fixture to which the lamp lighting device is attached is accurately determined, and the lighting fixture after the lifetime is used. The purpose is to prevent the occurrence of malfunctions.
Moreover, it aims at preventing deterioration of the lighting fixture which attached the lamp lighting device.
Moreover, it aims at extending the lifetime of the lighting fixture which attached the lamp lighting device.
It is another object of the present invention to obtain a lighting device that controls lighting so that a lamp luminous flux is maximized while preventing a problem of a lighting fixture provided with the lamp lighting device.

  A lamp lighting device of the present invention includes a DC power supply circuit that changes a commercial power supply to a DC voltage, a lighting circuit that converts the DC voltage into power corresponding to the lamp and supplies the lamp with power, a component of the DC power supply circuit, and a lighting circuit Temperature sensor that measures the temperature of any of the above parts and lamps, a timer circuit that measures the energization time for the DC power supply circuit or lighting circuit, and a preset temperature and temperature sensor for the part or lamp Depending on the temperature difference from the measured temperature, the energization time measured by the timer circuit is increased or decreased from the actual measurement time and integrated, and the accumulated energization time is compared with a predetermined set time to determine the accumulated energization time. And a lighting control circuit that outputs a signal for turning off the lamp to the lighting circuit when the set time is reached.

In the lamp lighting device of the present invention, the lighting control circuit includes a timer circuit according to a temperature difference between a predetermined set temperature of the DC power supply circuit component, the lighting circuit component or the lamp, and the measured temperature measured by the temperature sensor. The measured energization time is increased / decreased from the actual measurement time, and the accumulated energization time is compared with a predetermined set time. When the accumulated energization time reaches the predetermined set time, a signal to turn off the lamp is turned on. Since this is output to the circuit, this lamp lighting device is attached to the lighting fixture, the predetermined set temperature is set to a temperature lower than the temperature at which the parts of the lighting fixture deteriorate, and the predetermined setting time is set to a normal value that does not cause any malfunction in the lighting fixture. A corrected product that corrects the accumulated energization time based on the actual measurement time by increasing and decreasing the predetermined set time according to the temperature difference between the predetermined set temperature and the measured temperature. When the energization time reaches the specified set time, it is judged that the lighting equipment has reached the end of its life, and by not allowing this lighting equipment to be energized thereafter, it is possible to accurately determine the life of the lighting equipment, and the life exceeded It is possible to prevent problems such as smoke and fire of parts based on the deterioration of parts of lighting equipment due to use.
In addition, since it is determined whether the luminaire has reached the end of its life, not the installation time, but the actual energization time, especially in the case of a luminaire that is less frequently used, the lifetime will be longer than the lifetime determined by the installation time. Economical.

Embodiment 1 FIG.
FIG. 1 is a block circuit diagram showing a lamp lighting device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a lighting fixture using the lamp lighting device of FIG.
As shown in FIG. 1, a lamp lighting device 1 (hereinafter, referred to as a lighting device 1) is connected to an AC commercial power source 7, and a DC power circuit 6 that changes the commercial power source 7 to a DC voltage, a lighting / extinguishing circuit 3, and Consists of a load circuit 4, which converts a DC voltage into electric power corresponding to the lamp 8, supplies electric power to the lamp 8, and has a lighting circuit 2 that controls lighting of the lamp 8 and a microcomputer, and controls lighting and extinguishing of the lamp 8. And a lighting control circuit 5 that outputs a signal to the lighting circuit 2. Further, the lighting device 1 includes a temperature sensor 9 and a timer circuit 10.
The lamp 8 is a fluorescent lamp 8.
As shown in FIG. 2, the lighting device 1 is installed on an upper part of the lighting fixture body 12 and the like, and the fluorescent lamp 8 is covered with a shade 14 and sealed with the lighting fixture.

The operation of the lighting device will be described.
When the lighting fixture is energized, the lighting device 1 is energized, and the lighting circuit 2 turns on the fluorescent lamp 8. Also, the timer circuit 10 starts operating simultaneously with the energization, and the energization time is transmitted to the lighting control circuit 5 at a predetermined interval, for example. The lighting control circuit 5 adds the energization time to the energization time stored in the memory of the microcomputer, calculates the accumulated energization time, and stores this.
In addition, a normal energization time in which there is no problem with the lighting fixture including the parts is set to a predetermined setting time (for example, 40,000 hours in the case of a normal fluorescent lighting fixture), and the predetermined setting time is the lighting control circuit 5. The lighting control circuit 5 compares the set time with the accumulated energization time. When the accumulated energization time reaches the set time, the lighting apparatus is considered to have reached the end of its life. A light-off signal for turning off the fluorescent lamp 8 is transmitted from the control circuit 5 to the light-on / off circuit 3, and the lighting circuit 2 turns off the fluorescent lamp 8. Thereafter, the fluorescent lamp 8 is not lit even when the lighting device 1 is energized. Thus, since the lifetime of the lighting fixture is determined based on the accumulated energization time obtained by integrating the energization time, it is possible to accurately determine the lifetime, and to prevent occurrence of problems due to use after the lifetime.

During energization, the temperature sensor 9 measures the temperature of the components constituting the load circuit 4 of the lighting circuit 2, for example, the choke coil that controls the current flowing through the fluorescent lamp 8, at predetermined intervals, and the measurement result is displayed on the lighting control circuit. Send to 5. In the lighting control circuit 5, a predetermined set temperature that is lower than the temperature at which the choke coil deteriorates is stored in the memory of the microcomputer, for example, in the case of the choke coil, 70 ° C. to 90 ° C. is stored. A comparison with the measured temperature of the temperature sensor 9 is made, and when the measured temperature is lower than the set temperature, a current increasing signal is transmitted from the lighting control circuit 5 to the lighting / extinguishing circuit 3 when it is higher. . The lighting circuit 2 increases or decreases the current of the fluorescent lamp 8 by this signal. Thus, by controlling the energization current of the fluorescent lamp 8, the component temperature of the luminaire can be made lower than the temperature at which the components deteriorate, and the lifetime of the luminaire can be extended.
The increase / decrease of the current is not performed abruptly and is performed so that the brightness change of the lamp 8 does not feel strange.
The component measured by the temperature sensor 9 may be a component of the DC power supply circuit 6 in addition to the component of the lighting circuit 2. The predetermined set temperature in this case is lower than the temperature at which the components of the DC power supply circuit 6 deteriorate.

  Further, the lighting control circuit 5 determines the measurement time of the timer circuit 10 according to the temperature difference between the measured temperature of the load circuit 4 of the lighting circuit 2, for example, the choke coil and the predetermined set temperature. Increase / decrease processing from For example, when the temperature is higher by 10 ° C. than the set temperature, the measurement time of the timer 10 is doubled. In this way, the lighting control circuit 5 integrates the energization time measured by the timer circuit 10 by increasing / decreasing it from the actual measurement time, and compares the accumulated energization time with a predetermined set time to determine the accumulated energization time. When the set time is reached, a signal for turning off the lamp 8 is output to the lighting circuit 2. Therefore, the life of the lighting fixture can be determined more accurately by correcting the temperature of the lighting fixture.

  Further, instead of increasing / decreasing the integrated energization time, the predetermined set time may be increased / decreased similarly. Similar effects can be obtained.

Further, the fluorescent lamp has a maximum luminous flux when the temperature of the place where the temperature distribution of the tube wall defined by the shape of the fluorescent lamp is the lowest (hereinafter referred to as the coldest point) is a predetermined set temperature. Generally, it has a characteristic that the luminous flux decreases when the temperature is higher or lower than the set temperature.
By the way, the ambient temperature of the fluorescent lamp 8 generally changes depending on the installation location of the lighting fixture. Therefore, the coldest spot temperature of the fluorescent lamp 8 may deviate from the set temperature due to the influence of the ambient temperature or the like. In particular, when the lighting fixture in which the lower surface of the fluorescent lamp 8 is released and the lighting fixture that covers the periphery of the fluorescent lamp 8 shown in FIG. 2 with the shade 14 are compared, the temperature around the fluorescent lamp 8 increases in the latter case. The temperature at the coldest spot of the fluorescent lamp 8 is likely to deviate from the set temperature in the higher direction.
Therefore, the predetermined set temperature of the components of the load circuit 4 of the lighting circuit 2, for example, the choke coil, is lower than the deterioration temperature and corresponds to the predetermined set temperature at the coldest point of the fluorescent lamp 8. That is, the temperature of the choke coil when the coldest spot of the fluorescent lamp 8 reaches a predetermined set temperature is measured by the temperature sensor 9, and the lighting control circuit 5 determines the predetermined set temperature. A comparison with the measured temperature of the temperature sensor 9 is made, and when the measured temperature is lower than the set temperature, a current increase signal is transmitted to the lighting / light-off circuit 3 and when it is higher, a current decrease signal is transmitted. The lighting circuit 2 increases or decreases the current of the fluorescent lamp 8 by this signal. If it does in this way, the component temperature of a lighting fixture can be made into temperature lower than the temperature in which components deteriorate, the lifetime of a lighting fixture can be extended, and the maximum light beam of the fluorescent lamp 8 can be obtained.
In this case as well, the part measured by the temperature sensor 9 may be a part of the DC power supply circuit 6 in addition to the part of the lighting circuit 2. The predetermined set temperature is lower than the temperature at which the components of the DC power supply circuit 6 deteriorate.
The increase / decrease of the current is not performed abruptly and is performed so that the brightness change of the lamp 8 does not feel strange.

Although the case where the fluorescent lamp 8 is used as the lamp 8 has been described, the present lighting device 1 can be applied to the case where the LED 8 is used as the lamp 8 and the same effect can be obtained.
However, in the case of the LED 8, the temperature measurement by the temperature sensor 9 measures the temperature of the LED 8 itself, and the predetermined set temperature is, for example, 25 ° C., and the measured temperature is compared with this set temperature. Further, there is no LED 8 corresponding to the coldest spot in the case of the fluorescent lamp 8. Others are the same as those of the fluorescent lamp 8.

The lighting device 1 includes a DC power supply circuit 7 that changes a commercial power supply to a DC voltage, a lighting circuit 2 that converts the DC voltage into power corresponding to the lamp 8 and supplies power to the lamp 8, and components of the DC power supply circuit 6. Among the components of the lighting circuit 2 and the LED 8, the temperature sensor 9 for measuring any temperature, the timer circuit 10 for measuring the energization time for energizing the DC power supply circuit 6 or the lighting circuit 2, and the component or lamp 8. The predetermined set time set in advance is increased or decreased according to the temperature difference between the predetermined set temperature and the measured temperature measured by the temperature sensor 9, and the increased and decreased set set time and the energization measured by the timer circuit 10 are increased. A lighting control circuit 5 that outputs a signal for turning off the lamp 8 to the lighting circuit 2 when a predetermined set time in which the cumulative energization time is increased or decreased is compared with the accumulated energization time obtained by integrating the time. Therefore, the lighting device 1 is attached to the lighting fixture, the predetermined set temperature is set lower than the temperature at which the components of the lighting fixture deteriorate, and the predetermined set time is a normal energization time that does not cause a problem with the lighting fixture. The corrected integrated energization time is corrected to the predetermined set time by correcting the accumulated energization time based on the actually measured measurement time by adding and subtracting this predetermined set time according to the temperature difference between the predetermined set temperature and the measured temperature. When it is reached, it is judged that the lighting equipment has reached the end of its life, and it is possible to judge the life of the lighting equipment accurately by preventing the lighting equipment from being energized. It is possible to prevent problems such as smoke and fire of the base parts.
In addition, since it is determined whether the luminaire has reached the end of its life, not the installation time, but the actual energization time, especially in the case of a luminaire that is less frequently used, the lifetime will be longer than the lifetime determined by the installation time. Economical.

In the lighting device 1, the timer circuit 10 measures the energization time by energization, and the measurement control energization time is integrated and stored in the lighting control circuit 5 based on the measurement result, and the accumulated energization time and a predetermined set time are stored. In comparison, when the accumulated energization time reaches a predetermined set time, the lighting circuit 2 stops energizing the lamp 8 according to a command from the lighting control circuit 5.
Therefore, the lighting device 1 is attached to the lighting fixture, and a normal energizing time in which no trouble occurs in the lighting fixture including parts is set as a predetermined setting time, and this time is compared with the accumulated energizing time by use, and the accumulated energizing time is compared. If the luminaire has reached the end of its life when the set time is reached, the luminaire will not be able to be energized thereafter, that is, not at the time of installation of the luminaire, but at the actual energization time. Therefore, it is possible to accurately determine the lifetime, and to prevent problems such as smoke and ignition of parts based on the deterioration of the parts of the lighting fixture due to use beyond the lifetime.
In addition, since it is determined whether the luminaire has reached the end of its life, not the installation time, but the actual energization time, especially in the case of a luminaire that is less frequently used, the lifetime will be longer than the lifetime determined by the installation time. Economical.

  In the lighting device 1, the lighting control circuit 5 compares the measured temperature of the components of the DC power supply circuit or the components of the lighting circuit measured by the temperature sensor 9 with the predetermined set temperature, and the measured temperature is When the temperature is higher than the predetermined set temperature, the lamp current flowing through the lamp 8 is decreased. When the measured temperature is lower than the predetermined set temperature, a signal for increasing the lamp current flowing through the lamp 8 is output to the lighting circuit 2. Therefore, the lighting device 1 is attached to the lighting fixture, the predetermined set temperature is set to a temperature lower than the temperature at which the components of the lighting fixture are deteriorated, and the temperature of the components is lower than the temperature at which the components are deteriorated by controlling the energizing current of the lamp 8. Can extend the life of the luminaire.

  In the lighting device 1, the lamp 8 is a fluorescent lamp 8, and a predetermined set temperature of a part of the DC power supply circuit 6 or a part of the lighting circuit 2 is made to correspond to a predetermined set temperature of the coldest spot of the fluorescent lamp 8. Therefore, by attaching the lighting device 1 to the lighting fixture, the maximum luminous flux of the fluorescent lamp 8 can be obtained along with the extension of the lifetime of the lighting fixture.

Moreover, by mounting the lighting device 1 on a lighting fixture having a sealed lamp structure, the ambient temperature of the lamp 8 is likely to rise and the temperature of the lighting fixture is likely to rise in the sealed lighting fixture. Therefore, when the lighting control circuit 5 corrects the temperature of the integrated energization time or the temperature of the predetermined set time, the life of the lighting fixture can be accurately determined, and the lighting control circuit 5 increases or decreases the lamp current according to the measured temperature. In this case, it is possible to extend the life of the lighting fixture, and to make the predetermined set temperature of the components of the DC power supply circuit 6 or the components of the lighting circuit 2 correspond to the predetermined set temperature of the coldest spot of the fluorescent lamp 8. In such a case, the effects such as the ability to obtain the maximum luminous flux of the fluorescent lamp 8 with the extension of the life of the lighting fixture are more remarkable.
In addition, this lighting device 1 is naturally effective also for the lighting fixture of a lamp open structure.

It is a block circuit diagram which shows the lamp lighting device of Embodiment 1 of the present invention. It is sectional drawing which shows the lighting fixture which uses the lamp lighting device of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lamp lighting device, 2 Lighting circuit, 5 Lighting control circuit, 6 DC power supply circuit, 7 Commercial power supply, 8 Lamp (fluorescent lamp, LED), 9 Temperature sensor, 10 Timer circuit, 12 Lighting fixture main body.

Claims (5)

A DC power supply circuit for changing the commercial power supply to a DC voltage;
A lighting circuit for converting the DC voltage into electric power corresponding to the lamp and supplying electric power to the lamp;
A temperature sensor for measuring the temperature of any of the components of the DC power supply circuit, the components of the lighting circuit, and the lamp;
A timer circuit for measuring an energization time for energizing the DC power supply circuit or the lighting circuit;
In accordance with a temperature difference between a predetermined set temperature of the component or the lamp and a measured temperature measured by the temperature sensor, the energization time measured by the timer circuit is increased / decreased from the actual measurement time and integrated. A lighting control circuit that compares a time with a predetermined set time and outputs a signal to turn off the lamp to the lighting circuit when the accumulated energization time reaches the predetermined set time;
A lamp lighting device comprising: A DC power supply circuit for changing the commercial power supply to a DC voltage;
A lighting circuit for converting the DC voltage into electric power corresponding to the lamp and supplying electric power to the lamp;
A temperature sensor for measuring the temperature of any of the components of the DC power supply circuit, the components of the lighting circuit, and the lamp;
A timer circuit for measuring an energization time for energizing the DC power supply circuit or the lighting circuit;
In accordance with a temperature difference between a predetermined set temperature of the component or the lamp and a measured temperature measured by the temperature sensor, a predetermined set time set in advance is increased and decreased, and the increased and decreased predetermined set time and the Comparing with the accumulated energization time obtained by integrating the energization time measured by the timer circuit, and when the accumulated energization time reaches the increased or decreased predetermined set time, the signal for turning off the lamp is output to the lighting circuit A control circuit;
A lamp lighting device comprising: In the lamp lighting device according to claim 1 or 2,
The lighting control circuit compares the measured temperature measured by the temperature sensor with the predetermined set temperature, and when the measured temperature is higher than the predetermined set temperature, reduces the lamp current flowing through the lamp, In addition, when the measured temperature is lower than the predetermined set temperature, a signal for increasing a lamp current flowing through the lamp is output to the lighting circuit. The lamp is a fluorescent lamp,
The predetermined set temperature of the component of the DC power supply circuit or the component of the lighting circuit is made to correspond to the predetermined set temperature of the coldest point of the fluorescent lamp. Lamp lighting device according to. A lamp lighting device comprising the lamp lighting device according to any one of claims 1 to 4 mounted on a lamp lighting main body having a sealed lamp structure.

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