JP2001210137A - Appliance for fluorescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of a cataphoresis phenomenon for a long time even if a DC voltage component has been applied to a fluorescent lamp in addition to an AC voltage component. SOLUTION: The lamp appliance comprises an appliance body 1 having a top plate 4 and a ballast 3 fitted to the appliance body 1, and a DC voltage component is applied in addition to an AC voltage component between electrodes 8, 10 of a fluorescent lamp 2 in which the ballast 3 is to be fitted to the appliance body 1. Here, an area I is the surface of the fluorescent lamp 2 to the electrode 8 from the central part of the fluorescent lamp 2 among positive columns of the fluorescent lamp 2 which becomes high potential by a DC voltage component, and an area II is the surface of the fluorescent lamp 2 to the electrode 10 from the central part of the fluorescent lamp 2 among positive columns of the fluorescent lamp 2 which becomes low potential by a DC voltage component. In the appliance body 1, there is provided a means for making at least a part of temperature in the area I lower than the temperature of area II.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp fixture.

[0002]

2. Description of the Related Art A general fluorescent lamp used for a store, a house, or the like is a glass bulb, a glass stem sealed at both ends of the glass bulb, and mounted on the glass stem for electron emission. A filament coil (electrode) coated with a substance.

[0003] In such a fluorescent lamp, as the end of life is approached, the electron-emitting substance is scattered from the filament coil, making it difficult to light. When the fluorescent lamp becomes difficult to light in this way, a large amount of current flows through the filament coil, the temperature of the filament coil rises, and the filament coil may eventually break.

When the filament coil breaks, an arc discharge occurs between the glass stem and the broken filament coil, and the heat of the arc discharge may melt the glass stem.

Therefore, some conventional fluorescent lamp fixtures include a ballast having a built-in protection circuit for cutting off power supply before the glass stem is melted.

[0006]

However, there is a case where a small DC voltage component is applied to the fluorescent lamp in addition to the AC voltage component by a lighting component constituting a protection circuit in the ballast. By applying the DC voltage component, one filament coil becomes high potential and the other filament coil becomes low potential.

For this reason, mercury ions having a positive charge in the fluorescent lamp are attracted to the vicinity of the electrode on the low potential side, so that the amount of mercury vapor near the electrode on the high potential side is reduced. There is a problem that a difference occurs in the luminous flux output between both ends, that is, a cataphoresis phenomenon occurs.

The present invention has been made to solve such a problem, and prevents the occurrence of cataphoresis for a long time even when a DC voltage component is applied to a fluorescent lamp in addition to an AC voltage component. The present invention provides a fluorescent lamp appliance capable of performing the above-described operations.

[0009]

The fluorescent lamp fixture of the present invention includes a fixture body having a top plate, and a ballast attached to the fixture body, and the ballast is attached to the fixture body. A DC voltage component is applied between the electrodes of the fluorescent lamp to be applied, in addition to the AC voltage component, of the positive column portion of the fluorescent lamp, from the central portion of the fluorescent lamp to the electrode that becomes a high potential by the DC voltage component. When the surface of the fluorescent lamp is a region I, and in the positive column portion of the fluorescent lamp, the surface of the fluorescent lamp from the central portion of the fluorescent lamp to the electrode at which the potential becomes low by the DC voltage component is a region II. The apparatus main body is provided with a means for lowering at least a part of the temperature in the region I than the temperature in the region II.

With this configuration, the mercury vapor can be aggregated near the electrode on the high potential side, so that the mercury vapor in the fluorescent lamp can be suppressed from being biased to the vicinity of the electrode on the low potential side, and the fluorescent lamp can be prevented from being concentrated. It is possible to make it difficult for a difference in luminous flux output between both ends to occur.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a fluorescent lamp fixture according to a first embodiment of the present invention has a fixture main body 1 attached to a ceiling (not shown) and a fluorescent lamp 2 for lighting. And a ballast 3 such as a high-frequency lighting circuit.

The instrument body 1 is 1250 mm long and 120 mm wide.
mm and a height of 45 mm made of iron. The top plate portion 4, four side portions 5 a and 5 b (two of the four are not shown), and substantially a screw (see FIG. (Not shown) or the like.

On the outer surface of the top plate 4, two sockets 7 for mounting the fluorescent lamp 2 are provided. This socket 7 is on the central axis in the longitudinal direction of the top plate 4,
The distance between them is 1195 mm.

In the positive column portion of the fluorescent lamp 2, the surface of the fluorescent lamp 2 from the central portion of the fluorescent lamp 2 to the electrode 8 which becomes a high potential by a DC voltage component as described later is defined as a region I, Fluorescent lamp 2
Electrode 1 which becomes low potential by the DC voltage component from the center of
When the surface of the fluorescent lamp 2 up to 0 is defined as the region II, as a means for lowering at least a part of the temperature in the region I below the temperature of the region II, the top plate portion 4 facing the region I of the fluorescent lamp 2 is used. Is provided with one through-hole 9 having a diameter of 8 mm.

The details of the regions I and II will be described later with reference to FIG.

The through hole 9 is formed in the vicinity of the electrode 8 on the high potential side,
For example, it faces the fluorescent lamp 2 at a distance of 150 mm (distance L _{1 in} FIG. ₁ ) from the high potential side electrode 8 to the low potential side electrode 10. Normally, the ambient temperature on the surface of the fluorescent lamp 2 is higher than the ambient temperature inside the fixture body 1. Therefore, air outside the instrument body 1 around the through hole 9 flows into the instrument body 1 through the through hole 9.

Further, a through hole 11 having a diameter of 8 mm is provided in the side surface 5a. The air that has flowed into the instrument body 1 from the through hole 11 flows out of the through hole 11.

The fluorescent lamp 2 is, for example, a straight tube having a rated power of 32 W, and has a total length L ₂ of 1200 mm and a diameter of 26 m.
m glass bulb 12, a glass stem (not shown) sealed at both ends of the glass bulb 12, and a filament coil attached to the glass stem and coated with an electron emitting substance (not shown) An electrode 8 comprising
10 and a pair of bases 13 a and 13 b attached to both ends of the glass bulb 12.

The glass bulb 12 is filled with predetermined amounts of mercury and a rare gas.

The distance between the electrodes 8 and 10, ie, the discharge path length L
₃ is 1160 mm. Distance L ₄ from the electrode 8 to the end of the base 13a (excluding the terminal to be described later) is 20 mm.

Terminals 14a and 14b provided on bases 13a and 13b are inserted into the socket 7 of the fluorescent lamp device.

The ballast 3 is provided on the inner surface of the top plate 4 in the instrument body 1 and at a position, for example, 300 mm (distance L _{5 in} FIG. 1) from the through hole 11.

The ballast 3 contains a fluorescent lamp 2.
A protection circuit (not shown) for shutting off the power supply before the electrodes 8, 10 of the fluorescent lamp 2 are disconnected at the end of the life of the fluorescent lamp 2 is built in. Due to the characteristics of this protection circuit, a DC voltage component is applied to the fluorescent lamp 2.

Next, the occurrence time of the cataphoresis phenomenon when the fluorescent lamp 2 was turned on using such a fluorescent lamp fixture (hereinafter referred to as the product A of the present invention) was examined.

The ballast 3 used was one to which a DC voltage component of 5 V was applied in addition to the AC voltage component.

For comparison, a fluorescent lamp device (hereinafter referred to as a comparative product) having the same configuration as that of the product A of the present invention except that the through holes 9 and 11 were not provided was used.

In the fluorescent lamp 2, the mercury vapor was intentionally lit by direct current to bias the mercury vapor in the vicinity of the electrode 10 on the low potential side, and then left at room temperature for 10 hours to diffuse the mercury vapor into the fluorescent lamp 2. Was used.

The fluorescent lamp 2 thus prepared is mounted on the product A of the present invention and the comparative product, and a high-frequency power source (256 V,
(45 kHz), and the occurrence time of the cataphoresis phenomenon was examined. The following results were obtained.

The number of samples is two for both the product A of the present invention and the comparative product. The time of occurrence of the cataphoresis phenomenon here means that the fluorescent lamp 2 is continuously turned on immediately after the fluorescent lamp 2 is left standing for 10 hours, and the fluorescent lamp 2 is placed at two locations 200 mm apart from the ends of the bases 13a and 13b, respectively. Was measured, and the time when the luminance ratio was less than 1/2 was set.

As a result, in the product A of the present invention, the cataphoresis phenomenon occurred during the continuous lighting time of 14 hours to 24 hours. On the other hand, in the comparative product, the cataphoresis phenomenon occurred during the continuous lighting time of less than 14 hours. In general, fluorescent lamps used for general office lighting and residential lighting are considered to be practically sufficient if the cataphoresis phenomenon does not occur for a continuous lighting time of 14 hours or more based on the actual usage. Therefore, when the product A of the present invention is used for an office or a house, it can be used as a lamp that does not cause cataphoresis during a general use time.

In order to examine the reason for such a result, the surface temperature of the fluorescent lamp 2 when the fluorescent lamp 2 was turned on using the product A of the present invention was examined. As shown in FIG. The result was obtained.

In FIG. 2, the horizontal axis, that is, the position of the fluorescent lamp 2 in the longitudinal direction is 0 mm at the end of the base 13a closer to the electrode 8 on the high potential side (excluding the terminal 14a of the base 13a). , The distance from the end of the base 13a. 2, the point a is 20 mm from the end of the base 13a.
(The distance L _{4 in} FIG. 1), that is, the high potential side electrode 8
And the point b is 1180 mm from the end of the base 13a.
The position of ((distance L ₃ + distance L ₄ ) in FIG. 1), that is, the position of the electrode 10 on the low potential side, is set at 1 point from the end of the base 13a.
The position of 70 mm ((distance L ₁ + distance L ₄ ) in FIG. 1), that is, the position of the portion of the fluorescent lamp 2 facing the through hole 9 is shown. In the case of the fluorescent lamp 2, the positive column is in the range of 50 mm to 1150 mm in FIG. Therefore, the above-mentioned region I is 50 mm to 600 mm in FIG.
The range of mm is shown. In addition, the above-mentioned region II corresponds to 60 in FIG.
The range of 0 mm to 1150 mm is shown.

As is clear from FIG. 2, the surface temperature of the portion of the fluorescent lamp 2 facing the through hole 9 (point c in FIG. 2) is changed to the positive column portion of the fluorescent lamp in the vicinity (the base 13a in FIG. 2).
(In the range of 50 mm to 1150 mm from the end of the surface). This is because the through hole 9 outside the instrument body 1
This is probably because the surrounding air flows into the apparatus main body 1 through the through-hole 9 and the surface of the portion of the fluorescent lamp 2 facing the through-hole 9 is cooled.

Therefore, in the product A of the present invention, the low temperature portion (c) is formed on the surface of the fluorescent lamp 2 facing the through hole 9, that is, on the surface of the fluorescent lamp 2 near the electrode 8 on the high potential side. As a result, the electrode 1 on the low potential side is formed.
After mercury ions having a positive charge attracted to near zero become mercury atoms (mercury vapor), the mercury atoms are attracted to the inner surface of the point c and aggregated, so that the luminous flux output at both ends of the fluorescent lamp 2 is different. It is considered that the occurrence of the phenomenon became difficult.

As described above, in the positive column portion of the fluorescent lamp 2, the surface of the fluorescent lamp 2 from the center of the fluorescent lamp 2 to the electrode 8 which has a high potential by the DC voltage component is defined as the region I,
When the surface of the fluorescent lamp 2 from the center of the fluorescent lamp 2 to the electrode 10 at which the potential becomes low due to the DC voltage component in the positive column portion of the fluorescent lamp 2 is defined as a region II, at least a part of the temperature in the region I is reduced. As a means for lowering the temperature of the region II, the through hole 9 is provided in the top plate 4 facing the region I, so that the mercury vapor in the fluorescent lamp 2 is biased toward the vicinity of the electrode 10 on the low potential side. Can be suppressed, so that the occurrence of the cataphoresis phenomenon can be prevented for a long time.

The through hole 9 is connected to the high potential side electrode 8 by one.
It is not limited to 50mm apart position, if the overall length of the fluorescent lamp of 1200 mm, it is preferable that the distance L ₁ is provided in a range of 150Mm～400mm. Distance L ₁ is 150m
If it is less than m, it is difficult to form a low-temperature portion such as point c because it is too close to the high-temperature electrode 8. On the other hand, when the distance L ₁ exceeds 400 mm, because of the inability to agglutinate sufficient mercury vapor to the electrode 8 near the high-potential side, it is impossible to luminous flux output of the electrode 8 near the can sufficiently.

Further, since the through-hole 9 is provided in the top plate portion 4 facing the portion near the electrode 8 on the high potential side in the region I, the mercury vapor is more aggregated near the electrode 8.
It is possible to further suppress the mercury vapor in the fluorescent lamp 2 from being biased toward the vicinity of the electrode 10 on the low potential side.

In the above embodiment, the case where one through-hole 9 is provided in the top plate facing the region I has been described. However, a plurality of through holes 9 are provided in the top plate facing the region I. You may. However, the temperature distribution of the surface temperature of the fluorescent lamp 2 in this case is different from that shown in FIG.

Next, the fluorescent lamp fixture according to a second embodiment of the present invention, in the vicinity of the through-hole 11 of the stabilizer 3, the distance L ₅ shown in FIG. 1, for example, except that a 80mm It has the same configuration as the fluorescent lamp device according to the first embodiment of the present invention.

By using the fluorescent lamp fixture of the present embodiment (hereinafter referred to as the present invention B), the same fluorescent lamp 2 as that used for the present invention A is turned on under the same conditions as above, and the cataphoresis phenomenon occurs. The following results were obtained by examining the time of occurrence.

In the product B of the present invention, the cataphoresis phenomenon occurred during the continuous lighting time of 24 hours to 48 hours.
Therefore, the product B of the present invention can delay the occurrence time of the cataphoresis phenomenon more than the product A of the present invention.

This is because the heat generated during operation of the ballast 3 usually results in a large difference between the ambient temperature inside the instrument body 1 around the ballast 3 and the ambient temperature outside the instrument body 1. It is thought that the amount of air in the instrument body 1 flowing out of the instrument body 1 through the through hole can be increased, and the surface temperature of the portion of the fluorescent lamp 2 facing the through hole 9 can be efficiently reduced. Can be

As described above, according to the configuration of the fluorescent lamp device according to the second embodiment of the present invention, the fluorescent lamp 2
It is possible to further suppress the mercury vapor in the inside from being biased to the vicinity of the electrode 10 on the low potential side, and it is possible to prevent the cataphoresis phenomenon for a longer time.

Further, in the above embodiment, although the distance L ₅ between the ballast 3 and the through-hole 11 has been described for the case of 80 mm, the distance L ₅ represents the same effect as described above if the range of 20mm~100mm Obtainable.

Next, in a fluorescent lamp device according to a third embodiment of the present invention, as shown in FIG. 3, a fan 15 having a diameter of 25 mm is provided in the vicinity of the through hole 11 in the device main body 1. Except for this point, it has the same configuration as the fluorescent lamp device according to the first embodiment of the present invention.

The distance between the through hole 11 and the fan 15 is 6 mm
It is.

The fan 15 is supported by a support 16 fixed in the instrument body 1.

Although the electrodes 8 and 10 are not shown,
The left side is the high potential side, and the right side is the low potential side.

The support 16 is provided with a plurality of vents 16a through which air passes.

Using the fluorescent lamp fixture of the present embodiment (hereinafter referred to as the present invention C), the same fluorescent lamp 2 as used in the present invention A was turned on under the same conditions as above, and the cataphoresis phenomenon occurred. The following results were obtained by examining the time of occurrence.

In the product C of the present invention, the cataphoresis phenomenon did not occur even when the continuous lighting time was 48 hours or more. Therefore, the time of occurrence of the cataphoresis phenomenon can be delayed in the product C of the present invention as well as in the product A of the present invention.

This is because the air in the instrument body 1 is
It is considered that the surface temperature of the portion of the fluorescent lamp 2 facing the through-hole 9 was efficiently reduced because the forcible fluid was forced to flow out of the apparatus main body 1 through the through-hole 11.

As described above, according to the configuration of the fluorescent lamp fixture according to the third embodiment of the present invention, the fluorescent lamp 2
It is possible to suppress the mercury vapor in the inside from being biased to the vicinity of an electrode (not shown) on the low potential side, and it is possible to prevent the cataphoresis phenomenon for a longer time.

In the above embodiment, the case where the fan 15 is provided in the vicinity of the through hole 11 in the instrument body 1 has been described, but the fan 15 is provided in the through hole 11 or in the through hole 9 and in the vicinity thereof. Even if it is provided, the same effect as above can be obtained.

The fan 15 is connected to both through holes 9 and 11.
When provided inside or in the vicinity thereof, the cataphoresis phenomenon can be prevented for a longer time.

Next, a fluorescent lamp device according to a fourth embodiment of the present invention, as shown in FIG. 4, has a DC voltage component from the center of the fluorescent lamp 2 in the positive column of the fluorescent lamp 2. The area of the surface of the fluorescent lamp 2 up to the electrode 8 at which the potential becomes high due to the DC voltage component from the central portion of the fluorescent lamp 2 to the electrode 10 at which the potential becomes low due to the DC voltage component. If the surface of is a region II,
As means for lowering at least a part of the temperature in the region I to be lower than the temperature in the region II, a heat source provided on the top plate portion 17 facing the region I instead of the through hole 9 and protruding toward the fluorescent lamp 2 side. It has the same configuration as the fluorescent lamp device according to the first embodiment of the present invention except that it has a conductive projection 18.

In FIG. 4, reference numeral 19 denotes an instrument main body.

The protrusion 18 is provided at a position separated from the high-potential side electrode 8 by a distance L ₁ , for example, at a position separated by 150 mm. The projection 18 is made of, for example, iron and has a length of 10 mm, a width of 10 mm, and a height of 4 mm. The distance between the projection 18 and the fluorescent lamp 2 is, for example, 2 mm.

The same fluorescent lamp 2 as that used for the product A of the present invention was turned on under the same conditions as above using the device for a fluorescent lamp of the present embodiment (hereinafter referred to as the product D of the present invention), and the cataphoresis phenomenon occurred. The following results were obtained by examining the time of occurrence.

In the product D of the present invention, the cataphoresis phenomenon occurred during the continuous lighting time of 24 hours to 48 hours.
Therefore, the product D of the present invention can delay the occurrence time of the cataphoresis phenomenon to the same extent as the product B of the present invention.

In the case of the product D of the present invention, the surface temperature of the portion of the fluorescent lamp 2 facing the projection 18 is transmitted by transmitting the heat around the projection 18 into the apparatus main body 19 via the projection 18. In other words, also in the product D of the present invention, a distribution of the surface temperature of the fluorescent lamp as shown in FIG. 2 is obtained, and a low-temperature portion is formed on the surface of the fluorescent lamp 2 near the electrode 8 on the high potential side. It is believed that mercury vapor is formed and agglomerates in this part.

As described above, according to the configuration of the fixture for a fluorescent lamp according to the fourth embodiment of the present invention, the first aspect of the present invention is provided.
Similarly to the fluorescent lamp apparatus according to the embodiment, it is possible to suppress the mercury vapor in the fluorescent lamp 2 from being biased to the vicinity of the electrode 10 on the low potential side, and to prevent the cataphoresis phenomenon for a long time.

Although the above embodiment has been described with reference to the case where one projection 18 is provided on the top plate facing region I, a plurality of projections 18 are provided on the top plate facing region I.
May be provided.

Next, the fluorescent lamp apparatus according to the fifth embodiment of the present invention is different from the fluorescent lamp apparatus according to the fifth embodiment except that the tip of the projection 20 is in contact with the surface of the fluorescent lamp 2 as shown in FIG. Thus, it has the same configuration as the fluorescent lamp fixture according to the fourth embodiment of the present invention.

The protrusion 20 is made of iron and has a length of 10 mm,
It is 10 mm wide and 6 mm high.

By using the fluorescent lamp fixture of the present embodiment (hereinafter referred to as the present invention E), the same fluorescent lamp 2 as used in the present invention A was turned on under the same conditions as above, and the cataphoresis phenomenon was observed. The following results were obtained by examining the time of occurrence.

In the product E of the present invention, the cataphoresis phenomenon did not occur even when the continuous lighting time was 48 hours or more. Therefore, the product E of the present invention can delay the occurrence time of the cataphoresis phenomenon more than the product D of the present invention.

In the case of the product E of the present invention, when the protrusion 20 is brought into contact with the surface of the fluorescent lamp 2, the amount of heat conducted from the surface of the fluorescent lamp 2 through the protrusion 20 into the appliance body 19 is reduced. It is thought that this was because the number could be increased.

As described above, according to the configuration of the fixture for a fluorescent lamp according to the fifth embodiment of the present invention, the fluorescent lamp 2
It is possible to suppress the mercury vapor in the inside from being biased to the vicinity of the electrode 10 on the low potential side, and it is possible to prevent the cataphoresis phenomenon for a longer time.

Next, as shown in FIG. 6, the fluorescent lamp fixture according to the sixth embodiment of the present invention has a DC voltage component from the center of the fluorescent lamp 2 in the positive column of the fluorescent lamp 2. The area of the surface of the fluorescent lamp 2 up to the electrode 8 at which the potential becomes high due to the DC voltage component from the central portion of the fluorescent lamp 2 to the electrode 10 at which the potential becomes low due to the DC voltage component. If the surface of is a region II,
As means for lowering at least a part of the temperature in the region I from the temperature in the region II, a part of the top plate 21 facing the region I, for example, the top plate 21 facing the vicinity of the electrode 8 on the high potential side is used. Has the same configuration as that of the fluorescent lamp device according to the first embodiment of the present invention except that the thermal conductivity of the fluorescent lamp is higher than the thermal conductivity of the other top plate 21.

The apparatus main body 22 is 1250 mm long and 12 mm wide.
It has a box shape of 0 mm and a height of 45 mm, and includes a top plate portion 21, four side portions 23 made of iron (two of the four are not shown), and a ceiling mounting portion 24.

The top plate 21 is separated from the portion facing the electrode 8 on the high potential side, for example, by 6 mm (the distance L _{1 in} FIG. 6) from the electrode 8 on the high potential side toward the electrode 10 on the low potential side. 30mm long, 120mm wide aluminum plate 21a
For example, an iron plate 21b is used for other portions. The thickness of the top plate 21 is 0.5 mm.

No through hole is provided in any of the four side surfaces 23.

Next, the same fluorescent lamp 2 as used for the product A of the present invention was turned on under the same conditions as above using the device for a fluorescent lamp of the present embodiment (hereinafter referred to as the product F of the present invention). When the time of occurrence of the cataphoresis phenomenon was examined, the following results were obtained.

In the product F of the present invention, the cataphoresis phenomenon occurred during the continuous lighting time of 14 hours to 24 hours.
Therefore, the product F of the present invention was able to delay the occurrence time of the cataphoresis phenomenon to the same extent as the product A of the present invention.

In the case of the product F of the present invention, since the heat conduction around the top plate portion 21 is large, the surface temperature of the portion of the fluorescent lamp 2 facing the top plate portion 21 is increased. This is considered to be because the surface temperature distribution of the fluorescent lamp 2 as shown in FIG. 2 is obtained even in the product F of the present invention as shown in FIG. 2, and the mercury vapor aggregates in a portion where the surface temperature is low.

As described above, according to the structure of the fixture for a fluorescent lamp according to the sixth embodiment of the present invention, the first aspect of the present invention is provided.
Similarly to the fluorescent lamp apparatus according to the embodiment, it is possible to suppress the mercury vapor in the fluorescent lamp 2 from being biased to the vicinity of the electrode 10 on the low potential side, and to prevent the cataphoresis phenomenon for a long time.

In the above-described embodiment, the aluminum plate 21a is used for a part of the top plate 21 facing the region I. However, a brass plate, a copper plate, or the like may be used instead of the aluminum plate 21a. The effect can be obtained.

Next, as shown in FIG. 7, the fluorescent lamp fixture according to the seventh embodiment of the present invention comprises a DC column from the center of the fluorescent lamp 2 in the positive column of the fluorescent lamp 2. The area of the surface of the fluorescent lamp 2 up to the electrode 8 at which the potential becomes high due to the DC voltage component from the central portion of the fluorescent lamp 2 to the electrode 10 at which the potential becomes low due to the DC voltage component. If the surface of is a region II,
As means for lowering at least a part of the temperature in the region I than the temperature in the region II, the surface area of the portion of the top plate 25 facing the region I is made larger than the surface area of the portion facing the region II. Except for this point, it has the same configuration as the fluorescent lamp device according to the first embodiment of the present invention.

In FIG. 7, reference numeral 26 denotes an instrument main body.

The inner surface of the top plate 25 has a portion facing the region I, for example, 150 mm to 250 m from the end of the base 13a.
A zigzag-shaped plate 25a having a width of 120 mm is attached in a range of m.

The surface area of the top plate 25 facing the region I is
The zigzag plate 25a increases the surface area of the top plate 25 facing the region II by 12000 mm ² .

Next, the same fluorescent lamp as that used for the product A of the present invention was turned on under the same conditions as above using the fixture for a fluorescent lamp of the present embodiment (hereinafter referred to as product G of the present invention). When the time of occurrence of the cataphoresis phenomenon was examined, the following results were obtained.

In the product G of the present invention, the cataphoresis phenomenon occurred during the continuous lighting time of 14 hours to 24 hours.
Therefore, the product G of the present invention was able to delay the occurrence time of the cataphoresis phenomenon to the same extent as the product A of the present invention.

In the case of the product G of the present invention, the amount of heat radiation of the top plate 25 facing the region I is larger than the amount of heat radiation of the top plate 25 facing the region II. The surface temperature of the portion of the lamp 2, for example, 175 mm to 325 mm from the end of the base 13 a as shown in FIG. 8 becomes lower than the surface temperature of the other portions of the fluorescent lamp 2, and the mercury vapor condenses on the portion where the surface temperature is low. It is thought to be.

In FIG. 8, point a indicates the position of the electrode 8 and b
The dots indicate the positions of the electrodes 10, respectively.

The heat inside the instrument body 26 is transferred to the through hole 11.
Escapes to the outside of the instrument main body 26.

As described above, according to the configuration of the fluorescent lamp fixture according to the seventh embodiment of the present invention, the first aspect of the present invention is provided.
Similarly to the fluorescent lamp fixture according to the embodiment, it is possible to suppress the mercury vapor in the fluorescent lamp 2 from being biased to the vicinity of the electrode 10 on the low potential side, and it is possible to prevent the cataphoresis phenomenon for a longer time. .

In the above-described embodiment, the means for lowering at least a part of the temperature in the region I to be lower than the temperature in the region II is based on the temperature of the part where the surface temperature of the fluorescent lamp 2 is substantially constant ( (40 ° C.). This is because the surface temperature of the fluorescent lamp 2 needs to be lower than 40 ° C. in order to coagulate the mercury vapor.
This is because it is not easy to lower the temperature of the portion exceeding 0 ° C. to less than 40 ° C.

In the first to seventh embodiments, the case where the ballast 3 is provided on the inner surfaces of the top plates 4, 17, 21, and 25 has been described. It may be mounted on the inner surface of the.

In the first, second, fourth, fifth, and seventh embodiments, even if the through hole 11 is not provided, the gap is formed through the gaps formed in the instrument bodies 1, 19, and 26. The air inside and outside the instrument bodies 1, 19, 26 can be circulated. By providing the through holes 11, the air inside the instrument bodies 1, 19, 26 can be efficiently circulated through the through holes 11. , 19, 26.

In the first to fifth and seventh embodiments, the case where one through hole 11 is provided in the side plate 5a has been described. However, a plurality of through holes are provided in the side plate 5a. Alternatively, the through-hole 11 may be provided in another side plate.

[0094]

As described above, the present invention provides a fluorescent lamp device which can prevent the cataphoresis phenomenon from occurring for a long time even when a DC voltage component is applied in addition to an AC voltage when the fluorescent lamp is turned on. Is what you can do.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a fluorescent lamp device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing the relationship between the position in the longitudinal direction of the fluorescent lamp and the surface temperature of the fluorescent lamp when the fluorescent lamp is turned on using the fluorescent lamp fixture.

FIG. 3 is a partially cutaway front view of a fluorescent lamp device according to a third embodiment of the present invention.

FIG. 4 is a partially cutaway front view of a fluorescent lamp device according to a fourth embodiment of the present invention.

FIG. 5 is a partially cutaway front view of a fluorescent lamp device according to a fifth embodiment of the present invention.

FIG. 6 is a partially cutaway front view of a fluorescent lamp device according to a sixth embodiment of the present invention.

FIG. 7 is a partially cutaway front view of a fluorescent lamp device according to a seventh embodiment of the present invention.

FIG. 8 is a diagram showing the relationship between the position in the longitudinal direction of the fluorescent lamp and the surface temperature of the fluorescent lamp when the fluorescent lamp is turned on using the fluorescent lamp fixture.

[Explanation of symbols]

 1, 19, 22, 26 Instrument body 2 Fluorescent lamp 3 Ballast 4, 17, 21, 25 Top plate 5a, 5b, 23 Side 8, 10 Electrode 9, 11 Through hole 15 Fan 18, 20 Projection

Claims (11)

[Claims] 1. An appliance body having a top plate, and a ballast attached to the appliance body, wherein the ballast is provided between an electrode of a fluorescent lamp to be attached to the appliance body and an AC voltage component. Applying a DC voltage component, of the positive column portion of the fluorescent lamp, the surface of the fluorescent lamp from the central portion of the fluorescent lamp to the electrode having a high potential due to the DC voltage component is in a region I, When the surface of the fluorescent lamp from the center of the fluorescent lamp to the electrode at which the potential becomes low by the DC voltage component in the positive column is defined as region II, the region I is formed in the fixture body.
A means for lowering at least a part of the temperature in the region (2) below the temperature in the region (II). 2. The fluorescent lamp device according to claim 1, wherein said means is a through-hole provided in said top plate facing said area I. 3. The fluorescent lamp according to claim 2, wherein the appliance main body has a box shape having the top plate portion and a side portion, and another through hole is provided in the side plate. Appliances. 4. The fluorescent lamp fixture according to claim 3, wherein the ballast is housed in the fixture body and is provided near the another through hole. 5. The fluorescent lamp fixture according to claim 1, wherein a fan is provided in or near said through hole. 6. The fluorescent lamp device according to claim 3, wherein a fan is provided in or near said another through-hole. 7. The fluorescent light according to claim 1, wherein the means is a thermally conductive protrusion provided on the top plate facing the region I and protruding toward the fluorescent lamp. Lamp fixtures. 8. The fluorescent lamp device according to claim 7, wherein the projection is projected to a height at which the projection contacts the surface of the fluorescent lamp. 9. The apparatus according to claim 2, wherein the means is provided on the top plate portion facing the portion near the electrode on the high potential side in the region I. The fluorescent lamp device according to claim 1. 10. The apparatus according to claim 1, wherein the means is configured to make a thermal conductivity of at least a part of the top plate facing the region I higher than a thermal conductivity of another part of the top plate. The fluorescent lamp fixture according to claim 1, wherein 11. The apparatus according to claim 1, wherein said means is to make a surface area of said top plate facing said region I larger than a surface area of said top plate facing said region II. Fixtures for fluorescent lamps.