JP2022152307A - Discharge lamp lighting device and light irradiation device - Google Patents

Abstract

To provide a discharge lamp lighting device and a light irradiation device capable of reducing repair and maintenance.SOLUTION: A discharge lamp lighting device according to an embodiment capable of applying AC power to a discharge lamp includes a DC power supply unit having a first housing and capable of supplying DC power, a switching unit having a second housing, electrically connected to the output side of the DC power supply unit, and capable of converting the DC power into AC power, and a transformer unit having a third housing and electrically connected between the output side of the switching unit and the discharge lamp, and each of the first housing, the second housing, and the third housing is provided detachably to the discharge lamp lighting device.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD Embodiments of the present invention relate to a discharge lamp lighting device and a light irradiation device.

There is a discharge lamp lighting device for lighting a discharge lamp. Generally, a discharge lamp lighting device includes a filter circuit, a rectifying circuit, a smoothing circuit, a switching circuit, a transformer, a control circuit, and a housing that houses all of them. It is assumed that such a discharge lamp lighting device is installed as a single unit and removed or replaced as a single unit during repair or the like. As a result, the labor involved in repairs and maintenance has become a burden.

Furthermore, circuit components used in discharge lamp lighting devices tend to have shorter life cycles. Therefore, it may become difficult to repair or maintain the discharge lamp lighting device due to discontinuation of production of the circuit components. In addition, there are cases where production of the discharge lamp lighting device becomes difficult due to discontinuation of production of circuit components, or the specification or design of the discharge lamp lighting device is forced to change.

On the other hand, the service life of discharge lamp lighting devices and light irradiation devices equipped with discharge lamp lighting devices tends to become longer. For example, in business forms such as "Business to Business", there are many cases where the same discharge lamp lighting device or light irradiation device is used for many years because of continuous business relationships. In such a case, it becomes more difficult to repair and maintain the discharge lamp lighting device.
Therefore, it has been desired to develop a technique capable of reducing repairs and maintenance.

JP 2020-107489 A

The problem to be solved by the present invention is to provide a discharge lamp lighting device and a light irradiation device that can reduce repair and maintenance.

A discharge lamp lighting device according to an embodiment is a discharge lamp lighting device capable of applying AC power to a discharge lamp. The discharge lamp lighting device has a first housing, a DC power supply capable of supplying DC power; and a second housing, electrically connected to an output side of the DC power supply, a switching unit capable of converting DC power into AC power; a transformer unit having a third housing and electrically connected between the output side of the switching unit and the discharge lamp; is doing. Each of the first housing, the second housing, and the third housing is detachably provided to the discharge lamp lighting device.

According to the embodiments of the present invention, it is possible to provide a discharge lamp lighting device and a light irradiation device that can reduce repairs, maintenance, and the like.

It is a schematic circuit diagram for illustrating the light irradiation apparatus which concerns on this Embodiment. It is a schematic circuit diagram for illustrating the light irradiation apparatus which concerns on a comparative example. FIG. 4 is a schematic circuit diagram for illustrating a light irradiation device according to another embodiment;

Hereinafter, embodiments will be illustrated with reference to the drawings. In addition, in each drawing, the same reference numerals are given to the same constituent elements, and detailed description thereof will be omitted as appropriate.
FIG. 1 is a schematic circuit diagram for illustrating a light irradiation device 100 according to this embodiment.
As shown in FIG. 1, the light irradiation device 100 has a discharge lamp 200 and a discharge lamp lighting device 1, for example. The discharge lamp lighting device 1 applies AC power to the discharge lamp 200 .

The discharge lamp 200 has, for example, a cylindrical arc tube and a pair of electrodes provided on the arc tube. The type of the discharge lamp 200 is not particularly limited, and can be changed as appropriate according to the application of the light irradiation device 100, for example. For example, when the light irradiation device 100 is used for curing UV-curable inks, paints, adhesives, etc., when it is used for orientation treatment by a photo-alignment method, it is used for surface modification, purification, sterilization, etc. When used, it can be a discharge lamp 200 that emits light containing ultraviolet rays. For example, when the light irradiation device 100 is used for drying or heating an object to be treated, it can be a discharge lamp that emits light including visible light, or a discharge lamp that emits light including infrared light.
The types and applications of the discharge lamp 200 are not limited to those illustrated. Moreover, since a known technique can be applied to the configuration of the discharge lamp 200, detailed description thereof will be omitted.

As shown in FIG. 1, the discharge lamp lighting device 1 has, for example, a DC power supply section 2, a switching section 3, and a transformer section 4. As shown in FIG.
An input terminal 2a of the DC power supply section 2 is electrically connected to an AC power supply 201, for example. The output terminal 2b of the DC power supply section 2 is electrically connected to the input terminal 3a of the switching section 3, for example. The DC power supply unit 2 is detachably connected to the AC power supply 201 and the switching unit 3 .

AC power supply 201 is, for example, a commercial power supply. The AC power supply 201 is provided outside the DC power supply section 2 .

The DC power supply unit 2 converts the AC power from the AC power supply 201 into DC power, and supplies the DC power to the switching unit 3 .
The DC power supply unit 2 has, for example, a housing 20 (corresponding to an example of a first housing), a filter circuit 21, a rectifying circuit 22, and a smoothing circuit .
The housing 20 has a box-like shape and has a space inside for housing the filter circuit 21 , the rectifying circuit 22 , and the smoothing circuit 23 . Further, the housing 20 may be provided with ventilation holes, cooling fans, and the like.

The input side of the filter circuit 21 is electrically connected to, for example, the input terminal 2 a of the DC power supply section 2 and, in turn, the AC power supply 201 . A filter circuit 21 is provided to remove noise. The filter circuit 21 removes, for example, ripple components contained in the AC voltage applied by the AC power supply 201 . If the filter circuit 21 is provided, it is possible to suppress noise components from being included in the DC voltage when the AC voltage is converted to DC by the rectifier circuit 22 . Moreover, if the filter circuit 21 is provided, the noise emitted from the discharge lamp lighting device 1 can be suppressed. The filter circuit 21 can use, for example, a capacitor and an inductor.

The input side of the rectifier circuit 22 is electrically connected to the output side of the filter circuit 21, for example. The rectifier circuit 22 , for example, full-wave rectifies the AC voltage applied by the AC power supply 201 . The rectifier circuit 22 may be one that uses a diode bridge, for example.

The input side of the smoothing circuit 23 is electrically connected to the output side of the rectifying circuit 22, for example. The output side of the smoothing circuit 23 is electrically connected to the output terminal 2b of the DC power supply section 2, for example. The smoothing circuit 23 smoothes the DC voltage output from the rectifying circuit 22, for example. The smoothing circuit 23 may use, for example, an electrolytic capacitor.

The switching unit 3 is electrically connected to the output side of the DC power supply unit 2 and converts DC power into AC power.
An input terminal 3 a of the switching section 3 is electrically connected to an output terminal 2 b of the DC power supply section 2 . An output terminal 3 b of the switching section 3 is electrically connected to an input terminal 4 a of the transformer section 4 . The switching unit 3 is detachably connected to the DC power supply unit 2 and the transformer unit 4 .

The switching unit 3 has, for example, a housing 30 (corresponding to an example of a second housing), a switching circuit 31 and a control circuit 32 .
The housing 30 has a box-like shape and has a space inside for housing the switching circuit 31 and the control circuit 32 . Further, the housing 30 may be provided with ventilation holes, a cooling fan, and the like.

The input side of the switching circuit 31 is electrically connected to the input terminal 3a of the switching section 3 and, by extension, the DC power supply section 2, for example.

The switching circuit 31 has, for example, a converter circuit 31a and an inverter circuit 31b.

The input side of converter circuit 31 a is electrically connected to the output side of smoothing circuit 23 via input terminal 3 a of switching section 3 and output terminal 2 b of DC power supply section 2 .
The converter circuit 31a converts the input DC voltage into a predetermined DC voltage. The converter circuit 31a converts, for example, the DC voltage that has been full-wave rectified by the rectifier circuit 22 and smoothed by the smoothing circuit 23 into a predetermined DC voltage. For example, the converter circuit 31a can be a DC-DC converter.

The converter circuit 31a can use, for example, a flyback converter. The converter circuit 31a may use, for example, any one of a boost chopper circuit, a step-down chopper circuit, a step-up/step-down chopper circuit, and a circuit combining a step-up chopper circuit and a step-down chopper circuit.

The input side of the inverter circuit 31b is electrically connected to, for example, the output side of the converter circuit 31a. The output side of the inverter circuit 31b is electrically connected to the output terminal 3b of the switching section 3, for example.

The inverter circuit 31b converts the DC power output from the converter circuit 31a into AC power by switching. The inverter circuit 31b applies rectangular wave AC power to the discharge lamp 200, for example. The inverter circuit 31b converts direct current into alternating current by, for example, switching a plurality of switching elements. Switching elements include, for example, MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors), IGBTs (Insulated Gate Bipolar Transistors), FETs (Field Effect Transistors), GTOs (Gate Turn-Off thyristors), bipolar transistors, and the like. can be However, the switching elements are not limited to these.

The input side of the control circuit 32 is electrically connected to, for example, a controller 202 provided outside the discharge lamp lighting device 1 . The output side of the control circuit 32 can be electrically connected to, for example, the converter circuit 31a and the inverter circuit 31b. Furthermore, the output side of the control circuit 32 can be electrically connected to a circuit provided in the DC power supply section 2, for example.

When the control circuit 32 is electrically connected to a circuit (for example, the rectifier circuit 22) provided in the DC power supply section 2, the control circuit 32 is connected to the signal terminal 3c of the switching section 3 and the DC power supply. It can be electrically connected to a circuit provided in the DC power supply section 2 via the signal terminal 2 c of the section 2 .

The control circuit 32 controls at least one of the converter circuit 31a, the inverter circuit 31b, and the rectifier circuit 22 based on a signal input from the controller 202, for example.
For example, the control circuit 32 controls the converter circuit 31a to set the DC voltage applied to the inverter circuit 31b to a predetermined value. The control circuit 32 controls the AC power applied to the discharge lamp 200 by controlling the inverter circuit 31b, for example. The control circuit 32 can also adjust the light output of the discharge lamp 200, that is, dimming, by controlling the switching duty ratio (ON time in switching/switching period) in the inverter circuit 31b, for example.

The control circuit 32 can also have a calibration circuit that adjusts at least one of the output value of the DC power supply section 2 and the output value of the switching section 3 .
Details of the calibration circuit will be described later.

The transformer section 4 is electrically connected between the output side of the switching section 3 and the discharge lamp 200 .
For example, the input terminal 4 a of the transformer section 4 is electrically connected to the output terminal 3 b of the switching section 3 . For example, the output terminal 4b of the transformer section 4 is electrically connected to a holder 200a on which the discharge lamp 200 is mounted. The transformer section 4 is detachably connected to the switching section 3 and a holder 200a on which the discharge lamp 200 is mounted.

The transformer section 4 has, for example, a housing 40 (corresponding to an example of a third housing) and a transformer 41 .
The housing 40 has a box shape and has a space for housing the transformer 41 therein. Further, the housing 40 may be provided with ventilation holes, a cooling fan, and the like.

The transformer 41 is, for example, a leakage transformer and has a primary coil 41a and a secondary coil 41b. The primary coil 41a of the transformer 41 is electrically connected to the input terminal 4a of the transformer section 4 and, by extension, the switching section 3, for example. The secondary coil 41b of the transformer 41 is electrically connected to the output terminal 4b of the transformer section 4 and, in turn, to the holder 200a on which the discharge lamp 200 is mounted.

Next, a light irradiation device 300 according to a comparative example will be described.
FIG. 2 is a schematic circuit diagram illustrating a light irradiation device 300 according to a comparative example.
As shown in FIG. 2, the light irradiation device 300 has a discharge lamp 200 and a discharge lamp lighting device 301, for example.

The discharge lamp lighting device 301 has a DC power supply section 302 , a switching section 303 , a transformer section 304 and a housing 305 .
DC power supply section 302 has filter circuit 21 , rectifier circuit 22 , and smoothing circuit 23 .
The switching section 303 has a switching circuit 31 and a control circuit 32 .
The transformer section 304 has a transformer 41 .
The housing 305 has a box-like shape and has a space inside to house the filter circuit 21 , the rectifying circuit 22 , the smoothing circuit 23 , the switching circuit 31 , the control circuit 32 , and the transformer 41 .
That is, in discharge lamp lighting device 301 , filter circuit 21 , rectifying circuit 22 , smoothing circuit 23 , switching circuit 31 , control circuit 32 , and transformer 41 are housed inside one housing 305 .

In the discharge lamp lighting device 301, all the circuits are housed inside one housing 305, so that all the circuits are installed as a unit, and in the case of repair or the like, all the circuits can be removed or removed as a unit. will be replaced. However, since the housing 305 that houses all the circuits is large in size and weight, there are cases where the workability during repairs and maintenance is deteriorated and excessive labor is required.

In addition, circuit components used in the discharge lamp lighting device 301 (for example, active elements, passive elements, integrated circuits and elements combining these elements, etc.) tend to have a short life cycle. Therefore, if the production of circuit components is discontinued, it may become difficult to repair or maintain the discharge lamp lighting device 301 even if only some of the circuit components need to be replaced.

Further, if production of some circuit components is discontinued, it may become difficult to manufacture the discharge lamp lighting device 301, or the specification or design of the discharge lamp lighting device 301 may be unavoidably changed.

On the other hand, the service life of the discharge lamp lighting device 301 and the light irradiation device 300 including the discharge lamp lighting device 301 tends to become longer. For example, in a business form such as "Business to Business", there are many cases where the same discharge lamp lighting device 301 or light irradiation device 300 is used for a long period of time. In such a case, repair and maintenance of the discharge lamp lighting device 301 become more difficult.

A discharge lamp lighting device 1 according to the present embodiment includes a DC power supply section 2 having a housing 20, a switching section 3 having a housing 30, and a transformer section 4 having a housing 40. FIG. Each of the housing 20 , the housing 30 , and the housing 40 is detachably attached to the discharge lamp lighting device 1 .

In this case, the housing 20, the housing 30, and the housing 40 are smaller in size and weight than the housing 305 provided in the discharge lamp lighting device 301 according to the comparative example. As a result, workability in repair and maintenance can be improved, and labor can be reduced.

In addition, if the production of circuit parts used in the discharge lamp lighting device 1 is discontinued, the specifications of only the units (DC power supply unit 2, switching unit 3, and transformer unit 4) using the parts are changed. and design changes are sufficient. Therefore, for example, in business forms such as "Business to Business", it is possible to suppress increases in manufacturing costs, repair and maintenance costs, and the like.

Here, when at least one of the DC power supply unit 2, the switching unit 3, and the transformer unit 4 is replaced, the output value to the discharge lamp 200 may fluctuate.
In this case, as described above, if the control circuit 32 is provided with a calibration circuit, it is possible to adjust the output value according to the replaced unit. Data regarding calibration can be input from the controller 202, for example.

For example, the calibration circuit can adjust the output value of at least one of the converter circuit 31a and the inverter circuit 31b.
For example, the calibration circuit can adjust the DC voltage output from the converter circuit 31a to a predetermined value based on calibration-related data input from the controller 202 . For example, the calibration circuit can adjust the AC power output from the inverter circuit 31b to a predetermined value based on calibration-related data input from the controller 202 .

FIG. 3 is a schematic circuit diagram illustrating a light irradiation device 100a according to another embodiment. As shown in FIG. 3, the light irradiation device 100a has, for example, a discharge lamp 200 and a discharge lamp lighting device 1a.
The discharge lamp lighting device 1a has a filter section 24, a rectifying section 25, a smoothing section 26, a switching section 3, and a transformer section 4, for example.

The filter unit 24 has a housing 20 a (corresponding to an example of a fourth housing) and a filter circuit 21 . The housing 20a has a space for housing the filter circuit 21 therein. The input terminal 24a of the filter section 24 is electrically connected to the AC power supply 201, for example. The output terminal 24b of the filter section 24 is electrically connected to the input terminal 25a of the rectification section 25, for example. That is, the filter circuit 21 is housed in the housing 20 a and electrically connected to the AC power supply 201 .
Filter unit 24 (casing 20a) is detachably connected to AC power supply 201 and rectifying unit 25 .

The rectifying section 25 has a housing 20 b (corresponding to an example of a fifth housing) and a rectifying circuit 22 . The housing 20b has a space for accommodating the rectifier circuit 22 inside. The output terminal 25b of the rectifying section 25 is electrically connected to the input terminal 26a of the smoothing section 26, for example. That is, the rectifier circuit 22 is housed in the housing 20 b and electrically connected to the output side of the filter circuit 21 .
Rectifying section 25 (casing 20b) is detachably connected to filter section 24 and smoothing section 26 .

The smoothing section 26 has a housing 20 c (corresponding to an example of a sixth housing) and a smoothing circuit 23 . The housing 20c has a space for housing the smoothing circuit 23 therein. The output terminal 26b of the smoothing section 26 is electrically connected to the input terminal 3a of the switching section 3, for example. That is, the smoothing circuit 23 is housed in the housing 20 c and electrically connected to the output side of the rectifying circuit 22 .
The smoothing section 26 (casing 20c) is detachably connected to the rectifying section 25 and the switching section 3 .

Similar to the discharge lamp lighting device 1 described above, the switching unit 3 has a housing 30 (corresponding to an example of a seventh housing) and is electrically connected to the output side of the smoothing circuit 23 . The switching unit 3 converts the DC power from the smoothing circuit 23 into AC power.
The transformer section 4 has a housing 40 (corresponding to an example of an eighth housing) and is electrically connected between the output side of the switching section 3 and the discharge lamp 200 .
Each of the housing 20a, the housing 20b, the housing 20c, the housing 30, and the housing 40 is detachably provided to the discharge lamp lighting device 1a.

The discharge lamp lighting device 1 described above is provided with a housing 20 in which the filter circuit 21, the rectifier circuit 22, and the smoothing circuit 23 are housed. A housing 20a in which the rectifying circuit 22 is housed, a housing 20b in which the smoothing circuit 23 is housed, and a housing 20c in which the smoothing circuit 23 is housed are provided. That is, in the discharge lamp lighting device 1a, housings are provided for each of the filter circuit 21, the rectifying circuit 22, and the smoothing circuit 23. FIG.

With the discharge lamp lighting device 1a, the same effects as those of the discharge lamp lighting device 1 described above can be obtained.
Furthermore, the housing 20a, the housing 20b, and the housing 20c are smaller in size and weight than the housing 20. FIG. As a result, workability during repair and maintenance can be further improved, and labor can be further reduced.
Also, if production of circuit components is discontinued, it is sufficient to change the specifications or design of only smaller units. Therefore, for example, it is possible to further suppress increases in manufacturing costs, repair and maintenance costs, and the like.

Although the case where a housing is provided for each of the filter circuit 21, the rectifier circuit 22, and the smoothing circuit 23 is illustrated, for example, a housing that houses the filter circuit 21 and the rectifier circuit 22 and a housing that houses the smoothing circuit 23 are provided. A body may be provided. For example, a housing that houses the filter circuit 21 and a housing that houses the rectifier circuit 22 and the smoothing circuit 23 may be provided.

Further, for example, a housing that houses the switching circuit 31 and a housing that houses the control circuit 32 may be provided. For example, a housing that houses the converter circuit 31a, a housing that houses the inverter circuit 31b, and a housing that houses the control circuit 32 may be provided.

Although some embodiments of the present invention have been illustrated above, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, changes, etc. can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof. Moreover, each of the above-described embodiments can be implemented in combination with each other.

1 discharge lamp lighting device 1a discharge lamp lighting device 2 DC power supply unit 3 switching unit 4 transformer unit 20 housing 20a to 20c housing 21 filter circuit 22 rectifying circuit 23 smoothing circuit 30 housing , 31 switching circuit, 31a converter circuit, 31b inverter circuit, 32 control circuit, 40 housing, 41 transformer, 100 light irradiation device, 100a light irradiation device, 200 discharge lamp, 201 AC power supply, 202 controller

Claims (4)

A discharge lamp lighting device capable of applying AC power to a discharge lamp,
a DC power supply unit having a first housing and capable of supplying DC power;
a switching unit having a second housing, electrically connected to the output side of the DC power supply unit, and capable of converting the DC power into AC power;
a transformer unit having a third housing and electrically connected between the output side of the switching unit and the discharge lamp;
and
A discharge lamp lighting device, wherein each of the first casing, the second casing, and the third casing is detachably provided to the discharge lamp lighting device. A discharge lamp lighting device capable of applying AC power to a discharge lamp,
a filter circuit housed in a fourth housing and electrically connectable to an alternating current power supply;
a rectifier circuit housed in a fifth housing and electrically connectable to the output side of the filter circuit;
a smoothing circuit housed in a sixth housing and electrically connectable to the output side of the rectifying circuit;
a switching unit having a seventh housing, electrically connected to an output side of the smoothing circuit, and capable of converting DC power from the smoothing circuit into AC power;
a transformer unit having an eighth housing and electrically connected between the output side of the switching unit and the discharge lamp;
and
Each of the fourth housing, the fifth housing, the sixth housing, the seventh housing, and the eighth housing is detachably provided to the discharge lamp lighting device. discharge lamp lighting device. The switching unit
a converter circuit capable of converting an input DC voltage into a predetermined DC voltage;
an inverter circuit capable of converting the DC power output from the converter circuit into AC power by switching;
a control circuit capable of controlling at least one of the converter circuit and the inverter circuit;
has
3. The discharge lamp lighting device according to claim 1, wherein said control circuit has a calibration circuit capable of adjusting an output value of at least one of said converter circuit and said inverter circuit. a discharge lamp lighting device according to any one of claims 1 to 3;
a discharge lamp electrically connected to the discharge lamp lighting device;
A light irradiation device comprising

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