JP4490737B2 - Discharge lamp lighting device and method for grasping accumulated lighting time - Google Patents

Description

  The present invention relates to a discharge lamp lighting device, and more particularly, to an improvement in a measurement mechanism of a lighting integrated time of the discharge lamp.

In general, a discharge lamp has a characteristic that its luminous flux maintenance factor decreases with life. For this reason, even if the lighting power of the discharge lamp is kept constant, the luminous flux changes at the beginning and end of the life. In order to solve this problem, the discharge lamp lighting time is accumulated, and based on the accumulated time, a correction value is obtained from a luminous flux maintenance table prepared in advance inside the microcomputer of the discharge lamp lighting device, and the lighting power is changed. There exists a method (for example, refer patent document 1).
JP 2001-326086 A

In addition to the above-described control, it is indispensable to ascertain the accurate lighting integration time of the lamp in use when estimating the lamp life and preparing a maintenance plan. For this reason, it is necessary to adopt a configuration in which the accumulated lighting time is stored in a nonvolatile memory in a microcomputer incorporated in the electronic ballast.
By providing a display unit or the like for displaying the accumulated lighting time stored in the nonvolatile memory or the like in the main body of the discharge lamp lighting device, the stored accumulated lighting time can be read. In general, however, the instrument of the lamp and an electronic ballast body less likely to be placed in direct operable place, if the electronic ballast body direct manipulation is not possible locations are installed, maintenance planning It becomes difficult for the person who performs the operation to check the display unit itself .
The present invention has been made in view of the above problems, and its purpose is to easily check the accumulated lighting time stored in the main body even when the main body of the discharge lamp lighting device is installed in a place where direct operation is impossible. Disclosed is a discharge lamp lighting device , and a method for grasping an accumulated lighting time .

In order to achieve the above object, a discharge lamp lighting device according to the present invention includes a discharge lamp lighting device main body that performs discharge lamp lighting control, and a lighting frequency detection means that is provided separately from the discharge lamp lighting device main body. The discharge lamp lighting device main body includes a lighting frequency determination circuit that supplies an alternating current having a predetermined frequency to the discharge lamp, and a lighting frequency control means that sends a control signal to the lighting frequency determination circuit to control the lighting frequency of the discharge lamp. And a lighting time integrating means for integrating the lighting time of the discharge lamp, and an integrated time storage means for storing the integrated lighting time obtained by the lighting time integrating means, wherein the lighting frequency control means comprises the integrating The lighting frequency determining circuit is controlled so as to light the discharge lamp at a different lighting frequency according to the lighting integrated lighting time stored in the time storage means, and the lighting frequency detecting means , The light output of the discharge lamp was measured, the reading the lighting frequency from the time variation of the light output intensity, using the relationship between the lighting integrated time and the lighting frequency in the operating frequency control means, the cumulative illuminating from said read operating frequency It is characterized by Rukoto calculated back time.
In the above discharge lamp lighting device, it is preferable that the lighting frequency control means changes the lighting frequency of the discharge lamp at a constant rate every time the integrated lighting time elapses.
In addition, it is preferable that at least a part of the control range of the lighting frequency controlled by the lighting frequency control means is included in a range of 100 Hz to 220 Hz.
The lighting frequency control means preferably sets the lighting frequency when a new discharge lamp is installed to 100 Hz, and increases the lighting frequency of the discharge lamp by 5 Hz every time the lighting integrated time elapses 500 hours.
In the above discharge lamp lighting device, it is preferable that the lighting frequency control means is constituted by a digital IC.
Further, the method for grasping the lighting integrated time of the present invention includes a discharge lamp lighting device main body having integrated time storage means for storing the discharge lamp lighting integrated time, and a lighting frequency provided separately from the discharge lamp lighting device main body. A discharge lamp lighting device comprising: a detecting means, wherein the lighting integrated time is grasped by using the lighting frequency detecting means, the lighting integrated time stored in the integrated time storage means is read, and the lighting integrated time Referring to the correspondence table of the accumulated lighting time and lighting frequency provided to change the lighting frequency of the discharge lamp at a certain rate each time a constant time elapses, the lighting frequency corresponding to the read accumulated lighting time is extracted. It turns on the said discharge lamp at the lighting frequency, the lighting by using a frequency detection means, to measure the light output of the discharge lamp, the measured optical output intensity time Reading the lighting frequency of the discharge lamp from reduction, the cumulative illuminating time corresponding to the lighting frequency, characterized by calculating back from the correspondence table between the lighting integrated time and the lighting frequency.

According to the discharge lamp lighting device and the method of grasping the lighting integrated time of the present invention , the lighting frequency determination circuit is provided on the main body of the discharge lamp lighting device so that the discharge lamp is lit at a different lighting frequency according to the lighting integrated time. Even if the main body of the discharge lamp lighting device is installed in a place where direct operation is impossible , the lighting frequency control means to control is provided and the lighting frequency detection means is provided separately from the main body of the discharge lamp lighting device. It is possible to easily check the accumulated lamp lighting time.

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a discharge lamp lighting device according to an embodiment of the present invention.
The discharge lamp lighting device (electronic ballast 10) of the present invention includes a power supply circuit system 16 that supplies power from a supply power source 12 to a discharge lamp (lamp 14), and a control circuit system that controls the power supply circuit system. 18.
The power supply circuit system 16 includes a filter circuit 20, a rectifier circuit 22, a booster circuit 24, a lamp power supply circuit 26, a lighting frequency determination circuit 28, and a starting circuit 30 that are sequentially connected in parallel to the power supply 12. . The lamp 14 is connected to the output side of the lamp starting circuit 30. A noise component is removed from the AC from the power supply 12 by the filter circuit 20 and rectified and smoothed by the rectifier circuit 22. Further, the power supplied to the lamp is adjusted by the booster circuit 24 and the lamp power supply circuit 26. The lighting frequency determination circuit 28 is for supplying an alternating current having a predetermined frequency to the lamp 14, and the frequency is controlled by a control signal from the control circuit system 18. The lamp start circuit 30 starts the lamp 14. However, the configuration of the power supply circuit system 16 may be generally used and is not limited to the configuration of the present embodiment.

The control circuit system 18 is configured using a digital IC, and is programmed to perform electronic control of the power supply circuit system 16. The power supply circuit system 16 sends signals such as an input voltage, an input current, a capacitor voltage, a lamp voltage, and a lamp current for control.
A characteristic part of the present embodiment is that the control circuit system 18 is configured to intentionally change the lighting frequency of the lamp 14 in accordance with the integrated lighting time, and the lighting frequency is used as an indicator of the integrated lighting time of the lamp. It is in. In other words, in order to check the accumulated lighting time of the lamp stored in the non-volatile memory or the like, the information on the accumulated lighting time can be extracted by changing the lighting frequency without providing a special display unit or the like in the apparatus main body. .
For this reason, the lighting time integrating means 32 of the control circuit system 18 counts the lighting time, integrates the lighting time of the discharge lamp currently in use, and rewrites the lighting integrated time stored in the storage means at regular intervals. . Further, the storage means of the control circuitry 18 (e.g., a nonvolatile memory or the like incorporated in the digital IC) on, i.e., cumulative illuminating storage unit 34, the lighting integrated time of the discharge lamp that uses remembers, in accordance with the accumulated time It is programmed to change the lighting frequency (lighting frequency control means 38).

The method of changing the lighting frequency depending on the lighting integrated time may be performed according to an appropriate rule or stored as a correspondence table (corresponding table storage means 36) between the lighting lamp integrated lighting time and the lighting frequency. That is, the lighting frequency control means 38 reads the lighting integrated time of the lamp 14 from the lighting integrated storage means 34, refers to the correspondence table in the correspondence table storage means 36, and obtains lighting frequency information corresponding to the read lighting integrated time. Take out. Then, a control signal is sent to the lighting frequency determination circuit 28 based on the extracted lighting frequency.
The above is the schematic configuration of the present embodiment, and the operation thereof will be described next.
Here, as a correspondence between the lighting integrated time and the lighting frequency, a case where the lighting frequency is changed at a constant rate every time the lamp lighting integrated time elapses as shown in FIG. In other words, the lighting frequency when a new lamp is installed is 100 Hz, the lighting frequency is increased by 5 Hz every 500 hours of accumulated discharge lamp lighting time, and the lighting frequency is 220 Hz when the accumulated lighting time is 12000 hours. To do. Thereafter, the frequency is constant at 220 Hz. Further, when the lamp is replaced, the stored lighting integrated time is initialized to 0 by inputting the reset signal, and the lighting frequency is again started from 100 Hz. Further, the correspondence between the lighting integrated time and the lighting frequency is not limited to the example given here, and may be set as appropriate.

FIG. 3 is an explanatory diagram when reading the lighting integrated time in the discharge lamp lighting device according to the embodiment of the present invention. In the discharge lamp lighting device of the present embodiment, the lamp light output measuring instrument 40 is used as a lighting frequency detecting means for reading the lighting frequency. This lighting frequency detection means is provided separately from the electronic ballast 10 main body.
When the discharge lamp lighting device 10 is turned on, the lamp 14 is lit at a lighting frequency corresponding to the lamp integration time. When the lamp light output at this time is measured by the lamp light output measuring instrument 40, the light output intensity is measured. The lighting frequency of the lamp can be known from the time change. Then, since there is a relationship as shown in FIG. 2 between the lighting frequency and the lighting integrated time, it is possible to know the lighting integrated time. That is, the lighting frequency is obtained by measuring the light output of the lamp, and the accumulated time is calculated backward from the correspondence table. For example, if it is determined that the lighting frequency is 210 Hz as a result of measurement with the light output measuring instrument 40, it is understood that the lighting integrated time of the lamp is 11000 to 11500 hours.

As this, according to the lighting integrated time of the lamp, since the intentionally change the operating frequency of the lamp, the lighting frequency by measuring the lamp light output can tone bell. That is, it is not necessary to provide a display unit for displaying the accumulated time on the lighting device itself, and the accumulated lighting time can be easily checked even when a discharge lamp is installed in a place where direct operation is not possible.

In addition, since the lamp lighting integration time can be measured accurately and easily, it is possible to estimate the remaining lamp life, improve the maintenance plan, and the like.
Furthermore, in this embodiment, the control circuit is configured using a digital IC. For the purpose of stably lighting the lamp, a normally used analog IC is sufficient, but in this embodiment, since it is necessary to intentionally change the lighting frequency, it is necessary to accurately control the lighting frequency. However, in analog ICs, the main purpose is to make the lamps steadily lit, and the lamps are lit at different lighting frequencies, which are determined by the analog ICs, resistors, capacitors, etc. of the circuit. Is done. On the other hand, if a digital IC is adopted, there is no error in the lighting frequency for each product, which is preferable.

1 is a schematic configuration diagram of a discharge lamp lighting device according to an embodiment of the present invention. An example of correspondence between lighting integrated time and lighting frequency. Explanatory drawing of the detection of the lighting integration time by the discharge lamp lighting device concerning embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Discharge lamp lighting device 12 Supply power supply 14 Discharge lamp 16 Power supply circuit system 18 Control circuit system 28 Lighting frequency determination circuit 32 Lighting time integration means 34 Lighting integration time storage means 38 Lighting frequency control means

Claims (5)

A discharge lamp lighting device main body for controlling the lighting of the discharge lamp;
Lighting frequency detection means provided separately from the discharge lamp lighting device main body,
With
The discharge lamp lighting device main body is:
A lighting frequency determining circuit for supplying an alternating current of a predetermined frequency to the discharge lamp;
A lighting frequency control means for sending a control signal to the lighting frequency determination circuit and controlling the lighting frequency of the discharge lamp;
Lighting time integration means for integrating the discharge lamp lighting time;
Accumulated time storage means for storing the accumulated lighting time obtained by the lighting time integrating means;
With
The lighting frequency control means changes the lighting frequency of the discharge lamp at a constant rate every time the lighting integrated time elapses according to the lighting integrated lighting time stored in the integrated time storage means . , controls the lighting frequency determining circuit to light the discharge lamp at different lighting frequency,
The lighting frequency detection means, the light output of the discharge lamp was measured, read the lighting frequency from the time variation of the light output intensity, using the cumulative illuminating time of the lighting frequency relationship in the lighting frequency control means, read the the discharge lamp lighting device which is characterized that you back calculation the cumulative illuminating time from the lighting frequency. In the discharge lamp lighting device according to claim 1,
At least a part of the control range of the lighting frequency controlled by the lighting frequency control means is included in a range of 100 Hz to 220 Hz . In the discharge lamp lighting device according to claim 1 or 2,
The lighting frequency control means sets the lighting frequency when a new discharge lamp is installed to 100 Hz, and increases the lighting frequency of the discharge lamp by 5 Hz every time the integrated lighting time elapses 500 hours. apparatus. In the discharge lamp lighting device according to any one of claims 1 to 3 ,
The discharge lamp lighting device, wherein the lighting frequency control means is constituted by a digital IC. In the discharge lamp lighting device, comprising: a discharge lamp lighting device body having an accumulated time storage means for storing the accumulated lighting time of the discharge lamp; and a lighting frequency detection means provided separately from the discharge lamp lighting device body. A method of grasping the accumulated lighting time using a frequency detection means,
The integrated lighting time stored in the integrated time storage means is read out, and the integrated lighting time and the lighting frequency provided so as to change the lighting frequency of the discharge lamp at a constant rate every time the integrated lighting time elapses . Referring to the correspondence table, take out the lighting frequency corresponding to the read lighting integration time, turn on the discharge lamp at this lighting frequency,
Using the lighting frequency detection means, the light output of the discharge lamp is measured, the lighting frequency of the discharge lamp is read from the time change of the measured light output intensity, and the lighting integrated time corresponding to the lighting frequency is calculated as the lighting integrated A method of grasping the accumulated lighting time, characterized by performing reverse calculation from a correspondence table of time and lighting frequency.

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