JP2002329401A - Bulb-type fluorescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high optical output bulb-type fluorescent lamp which can replace an HID lamp. SOLUTION: The bulb-type fluorescent lamp 1 has a fluorescent lamp 2 possessing high output bent form bulbs 2a, 2b, 2c of wherein a pair of electrodes 10, 10 are sealed and installed on both ends, a cover 4 which has a base 3 on one end side 4a and wherein the fluorescent lamp 2 is mounted on another end side 4b, a lighting circuit 5 which is housed in the cover 4 and which makes the fluorescent lamp 2 turn on, and a blast means 6 which is arranged and installed on another end side 4b of the cover 4 which actuates so as to forcibly ventilate from inside to outside of the cover 4 during lighting of the fluorescent lamp 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-power bulb-type fluorescent lamp having a blower for forcibly cooling a lighting circuit.

[0002]

2. Description of the Related Art A bulb-type fluorescent lamp has a fluorescent lamp in which, for example, a plurality of U-shaped bulbs are connected, and a pair of filament electrodes are sealed at both ends thereof.
Because of their small size, high efficiency, power saving, and long life, they are widely used in place of general 60 W and 100 W incandescent lamps. Such a bulb-type fluorescent lamp is disclosed in, for example, Japanese Patent Application Laid-Open No. 9-231825 (prior art), and the configuration is shown in FIG.

[0003] As shown in FIG.
A lamp 52 is attached to one end of a cover 51, and a fluorescent lamp 54 formed by connecting a U-shaped bulb 53 is attached to the other end of the cover 51. A circuit 55 is housed. The lighting circuit 55 is configured by mounting an electronic component 57 and the like on a circuit board 56, and is formed as a high-frequency lighting circuit including an inverter circuit and the like.

The light-bulb-shaped fluorescent lamp 50 can suppress the heat generation of the high-frequency lighting circuit and improve the heat resistance by improving the inverter circuit technology and the reliability of the circuit components. Even if the size is reduced, the temperature of the lighting circuit 55 in the cover 51 is not excessively increased, and the lighting circuit 55 is prevented from being damaged by heat.

[0005]

In recent years, it has been desired to provide a bulb-type fluorescent lamp as an alternative to an HID lamp having a relatively large amount of light. In this case, in the conventional bulb-type fluorescent lamp 50, it is necessary to increase the output of the fluorescent lamp 54, so the radiant heat from the fluorescent lamp 54 and the amount of heat generated by the inverter circuit and the like are increased, and the lighting circuit 55 is heated. Therefore, there is a problem that the electronic component 57 such as a switch element is thermally damaged.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bulb-type fluorescent lamp having a high light output which can be substituted for an HID lamp.

[0007]

According to a first aspect of the present invention, there is provided a bulb-type fluorescent lamp in which a discharge medium comprising mercury and a rare gas is sealed, a phosphor film is formed on an inner surface, and a pair of opposite ends is provided. A fluorescent lamp having a bent bulb in which the electrodes are sealed; a cover having a base at one end and a fluorescent lamp attached to the other end; A lighting circuit that is electrically connected to turn on the fluorescent lamp; and a blowing means that is disposed on the other end side of the cover and that operates to forcibly vent the inside of the cover to the outside when the fluorescent lamp is turned on. It is characterized by doing.

[0008] The bent valve is a valve formed by heating and softening and bending a straight tubular valve, and also a so-called bridge or molded valve in which tubular valves are connected to each other at their ends to communicate with each other. Included.

In a bulb-type fluorescent lamp, an input voltage is applied to a base, and the input voltage is switched on and off outside the bulb-type fluorescent lamp. Then, when an input voltage is applied to the base, the lighting circuit operates, the fluorescent lamp is turned on, and circuit components such as switch elements constituting the lighting circuit generate heat. Therefore, the fact that the blowing means operates when the fluorescent lamp is turned on means that the blowing means operates when power is supplied to the base.

According to the present invention, when the fluorescent lamp is lit, heat inside the cover, including heat generated from the lighting circuit, is forcibly ventilated (discharged) from inside the cover to outside by the blowing means. Is done. Therefore, even if the output of the fluorescent lamp is increased, the circuit components constituting the lighting circuit are cooled by the ventilation by the blowing means, so that the temperature rise is suppressed, and thermal destruction is prevented.

According to a second aspect of the present invention, there is provided the bulb-type fluorescent lamp according to the first aspect, wherein a partition plate is attached to the other end of the cover, and the fluorescent lamp is attached to the partition plate. And a vent hole is formed in a part of the partition plate surrounded by the fluorescent lamp.

The part of the partition plate surrounded by the fluorescent lamp means a part of the partition plate surrounded by the bent bulb, and this part is wide and can easily form a ventilation hole.

[0013] The ventilation from the inside of the cover to the outside by the blowing means is performed through a ventilation hole formed in the partition plate.
When the bulb-shaped fluorescent lamp is lit with the base facing upward (base-up lighting), since the ventilation is performed from the inside of the cover to the outside, moisture enters the inside of the cover from the ventilation hole. Hateful. Therefore, the compact fluorescent lamp can be installed outdoors.

Further, since the inside of the cover is heated by the heat of the lighting circuit and the radiant heat from the end of the bulb, the ventilation of the ventilation means is warm, and the ventilation does not overcool the fluorescent lamp. Therefore, it is expected that the outer tube wall of the high-power fluorescent lamp is cooled, blackening or the like is prevented, and the lamp life is prolonged.

According to the present invention, the air is ventilated from the inside of the cover to the outside through the ventilation hole formed in the partition plate attached to the other end of the cover, thereby increasing the temperature inside the cover. And moisture is less likely to enter the inside of the cover.

According to a third aspect of the present invention, there is provided a bulb-type fluorescent lamp according to the first or second aspect, wherein a gap communicating with the inside of the cover is provided between one end of the cover and the base. The air is blown into the cover from the gap by the operation of the blowing means.

In order to force the ventilation from the inside of the cover to the outside by the blowing means, it is preferable to have an air inlet from the outside to the inside of the cover. The gap as the intake port can be easily formed by, for example, caulking a base on one end side of the cover, and there is no need to provide a separate intake port, so that a bulb-type fluorescent lamp is formed at low cost. . Further, since the gap is not easily visible, the appearance of the bulb-type fluorescent lamp is improved. Furthermore, the gap makes it difficult for dust and dirt to enter the inside of the cover, so that short-circuiting of circuit components of the lighting circuit and the like are prevented, and the electrical safety of the lighting circuit is improved.

According to the present invention, the air is sucked into the inside of the cover from the outside through the gap formed between one end of the cover and the base, so that the operation of the air blowing means easily forces the inside of the cover to the outside. Effective ventilation is formed.

According to a fourth aspect of the present invention, there is provided a bulb-type fluorescent lamp according to any one of the first to third aspects, wherein the electric power of the fluorescent lamp is 25 to 50 W.

When the power is 25 W or more, a high-output fluorescent lamp can be formed, and for example, a total luminous flux of 2000 lumens is possible. If the power exceeds 50 W, the amount of heat from the fluorescent lamp increases, and even if the ventilation means forcibly ventilates, it may not be possible to suppress a rise in the temperature inside the cover. As a result, a lighting circuit is configured. The life of the circuit components may be shortened. Therefore, the electric power of the fluorescent lamp is set to 25 to 50 W.

Then, for example, at a power of 32 W, a general 1
A total luminous flux of 2100 lumens corresponding to a 00 W incandescent lamp was obtained, and at a power of 40 W, a total luminous flux of 2500 lumens corresponding to a 150 W incandescent lamp was also obtained.

According to the present invention, the power of the fluorescent lamp is 25
Since the power is 〜50 W, the amount of light from the fluorescent lamp is large, and the bulb-type fluorescent lamp can be used as a substitute for the HID lamp.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention.
FIG. 1 is a schematic partially cutaway front view of a bulb-type fluorescent lamp,
FIG. 2 is a schematic bottom view. Light bulb shaped fluorescent lamp 1
Is composed of a fluorescent lamp 2, a cover 4 having a base 3 on one end 4a, a lighting circuit 5 housed in the cover 4, a fan 6 as a blower, and the like.

In the fluorescent lamp 2, three bulbs 2a, 2b, 2c bent in a U-shape having a tube diameter of 9 to 16 mm are connected by a joint 7 (shown in FIG. 2), and one discharge path 8 is formed. Is formed. Then, the connected valves 2a, 2
In b and 2c, a phosphor film 9 that emits visible light is formed on the inner surface. Further, the connected valves 2a, 2b, 2c
, That is, at one end of each of the bulbs 2a and 2c, a pair of electrodes (filament electrodes) 10,
A discharge medium 13 such as mercury 11 and argon gas 12 as a rare gas is sealed therein. Here, the mercury 11 is sealed in the form of, for example, bismuth (Bi) -indium (In) amalgam.
This amalgam immediately evaporates the mercury 11 by the heat generated by the valves 2a, 2b, 2c. And the fluorescent lamp 2
Is attached to a partition plate 14. Further, the fluorescent lamp 2 is formed in a high-output type with an electric power of 25 to 50 W. For example, the fluorescent lamp 2 has a bulb length L1 of 110 mm,
It is formed with a power of 28 W.

The cover 4 has the base 3 on one end 4a,
The fluorescent lamp 2 is attached to the other end 4b,
The upper cover 4A and the lower cover 4B are composed of two parts,
Each is made of heat-resistant polybutylene terephthalate (PBT) resin. The upper cover 4A and the lower cover 4B have a locking portion and a locked portion (not shown), respectively. The upper cover 4A is fitted to the lower cover 4B, and the locking portion and the locked portion are engaged. And integrated.

The base 3 is put on one end of the upper cover 4A, that is, one end 4a of the cover 4, and is fixed by caulking. As a result, a gap 15 is formed between one end 4 a of the cover 4 and the base 3. This gap 15 extends along the outer surface of one end 4a of the cover 4,
The inside and outside of the cover 4 are communicated. Since the gap 15 is so small that it cannot be easily confirmed visually, the appearance of the bulb-type fluorescent lamp 1 can be improved, and the electrical safety of the lighting circuit 5 such as dust and dirt is impaired. This makes it difficult for foreign substances to enter. Also,
Since there is no need to separately form a vent (gap) communicating with the inside of the cover 4, the bulb-type fluorescent lamp 1 can be inexpensive.

On the other end of the lower cover 4B, that is, on the other end 4b of the cover 4, a partition plate 14 made of PBT resin and mounting the fluorescent lamp 2 is connected to the other end 4b of the cover 4. It is attached by a thermosetting adhesive (not shown) so as to be closed. That is, the partition plate 14
An insertion hole (not shown) is formed, and the ends of the valves 2a, 2b, and 2c are inserted into the insertion holes, respectively. The ends of the valves 2a, 2b, 2c are fixed to the partition plate 14 with a thermosetting adhesive (not shown).

Then, as shown in FIG.
A ventilation hole 17 is formed in a portion 16 of the partition plate 14 surrounded by the above. The ventilation hole 17 is formed, for example, with a width of 2 to 3 mm and an appropriate length, and communicates the inside and the outside of the cover 4. The portion 16 of the partition plate 14 is located at a location surrounded by the bent bulbs 2a, 2b, 2c constituting the fluorescent lamp 2, and is a relatively wide place on the partition plate 14. Therefore, a predetermined ventilation hole 17 can be easily formed.

Further, as shown in FIG.
The lighting circuit 5 is accommodated. The lighting circuit 5 includes a well-known circuit in which electronic components such as a transistor 19, an electrolytic capacitor 20, a film capacitor 21, a resistor 22, and an inductor 23 are mounted on a circuit board 18. The circuit board 18 is attached to an attachment plate 24 fixed to the inner wall of the lower cover 4B with an adhesive or the like with an adhesive or a screw. Circuit board 18
Has many holes (not shown) on which the electronic components are mounted, but on which the electronic components are not mounted. Further, except for the mounting plate 24, the lower cover 4
A gap (not shown) is provided between the inner wall B and the inner wall.
The interior of the upper cover 4A and the interior of the lower cover 4B communicate with each other through these holes and gaps, and are permeable. The lighting circuit 5 is electrically connected to the base 3 and the filament electrodes 10 and 10 of the fluorescent lamp 2. When supplied with power through the base 3, the lighting circuit 5 outputs high-frequency power to turn on the fluorescent lamp 2. .

The cover 4 is provided with a fan 6 as a blower at the other end 4b. The fan 6 is located between the circuit board 18 and the ends of the valves 2 a, 2 b, 2 c, and is formed at the portion 16 of the partition plate 14.
7 is attached to the circuit board 18 via spacers 25 and 25 by screws or the like. The motor of the fan 6 is electrically connected to the base 3 via the circuit board 18 and operates when the base 3 is supplied with power.
Then, the fan 6 is forcibly ventilated from the inside of the cover 4 to the outside through the vent hole 17. When power is supplied to the base 3, the lighting circuit 5 operates to turn on the fluorescent lamp 2, so that the fan 6 operates when the fluorescent lamp 2 is turned on.

Next, the operation of the embodiment of the present invention will be described.

When the lighting circuit 5 is supplied with electric power via the base 3, the lighting circuit 5 operates to output a high-frequency voltage to be applied between the filament electrodes 10 of the fluorescent lamp 2.
Then, a discharge is formed in the discharge path 8 between the filament electrodes 10, 10, and the mercury vapor pressure of the mercury 11 constituting the discharge medium 13 increases. Visible light is radiated from the phosphor film 9 by the bright line of the mercury 11, and the bulbs 2a, 2b,
Radiated from c to the outside.

Then, the electronic components constituting the lighting circuit 5 mounted on the circuit board 18, in particular, the heating elements such as the transistor 19 and the inductor 23 generate heat, and the temperature inside the cover 4 increases. In addition, the filament electrodes 10, 1
0, the connected bulbs 2a, 2b, 2c
The temperature rises and generates heat, and the internal temperature of the cover 4 rises due to radiant heat from each end. In particular, the fluorescent lamp 2 is of a high output type, and its power is 28 W. Therefore, the amount of heat radiated from the ends of the bulbs 2a, 2b, 2c to the inside of the cover 4 increases, and the amount of heat generated by the lighting circuit 5 also increases, so that the internal temperature of the cover 4 rises excessively. It is easier.

However, when power is supplied to the base 3, the fan 6
Works. When the fan 6 operates, air is taken into the inside of the cover 4 from the gap 15 formed on one end 4a of the cover 4. The air sucked into the cover 4 reaches the fan 6 through the lighting circuit 5 such as the transistor 19 and the inductor 23, the hole of the circuit board 18 or the gap between the circuit board 18 and the inner wall of the lower cover 4B, Further, the air is exhausted to the outside of the cover 4 from the ventilation holes 17 formed in the partition plate 14 by the fan 6.

By the operation of the fan 6, air is taken from the gap 15 into the cover 4, and the ventilation by this air intake cools the electronic components constituting the lighting circuit 5, particularly the heat-generating components such as the transistor 19 and the inductor 23. Since the air is exhausted from the ventilation holes 17 to the outside of the cover 4, a rise in the temperature inside the cover 4 is suppressed, and an excessive rise in the temperature of the electronic components is suppressed. Therefore, thermal destruction of electronic components such as the transistor 19 and the inductor 23 can be prevented, and the life can be prolonged.

The fluorescent lamp 2 is of a high output type, and emits a large amount of light from the bulbs 2a, 2b, 2c to the outside. Therefore, the downlight is installed at a high ceiling such as a hall or a lobby. It can be used as a substitute for a HID lamp such as

As shown in FIG. 1, the bulb-shaped fluorescent lamp 1 is covered with a base 3 substantially covering one end 4a of a cover 4, and as shown in FIG. 2, the bulbs 2a, 2b and 2c are mounted on the bulbs 2a, 2b and 2c. A ventilation hole 17 is formed in a portion 16 of the surrounded partition plate 14, and the ventilation hole 17 allows the cover 4 to be ventilated from inside to outside. When the bulb-type fluorescent lamp 1 is turned on base up, even if moisture adheres to the outer surface of the cover 4, the moisture enters the inside of the cover 4 from the gap 15 formed at one end 4 a of the cover 4. In addition, since the ventilation holes 17 of the partition plate 14 face downward and there is ventilation from the inside of the cover 4 to the outside, moisture does not enter the inside of the cover 4. Therefore, the bulb-type fluorescent lamp 1 can be mounted in a place such as an entrance where outdoor moisture may adhere.

In the above-described embodiment, the ventilation holes 17 for forcibly ventilating the inside of the cover 4 from the inside to the outside by the fan 6 are provided at the portion 1 of the partition plate 14 surrounded by the fluorescent lamp 2.
However, the present invention is not limited to this, and may be formed on other parts of the partition plate 14 or on the cover 4 such as the lower cover 4B.
The gap 15 formed on one end 4a of the cover 4 is
It is not necessary to form the cover 4 forcibly, and only the inside of the cover 4 may be exhausted by the fan 6.

When the bulb-type fluorescent lamp 1 is lit in a direction in which the longitudinal direction of the fluorescent lamp 2 is perpendicular to the gravity, that is, in a direction in which the fluorescent lamp 2 is horizontal, the convection of the connected bulbs 2a, 2b, 2c. The heat is radiated upward, and the amount of heat transmitted from the end of the bulb to the inside of the cover 4 is significantly reduced as compared with the case of base-up lighting. That is, the cover 4
Temperature rises mainly due to the heat generated by the lighting circuit 5. In this case, the temperature rise of the electronic components constituting the lighting circuit 5 can be suppressed without forcibly exhausting the inside of the cover 4. This can prevent the lighting circuit 5 from being thermally destroyed. Therefore, the fluorescent lamps 2
Even if the output is as high as 0 W, the bulb-type fluorescent lamp mounted on the appliance body or the like in a substantially horizontal direction does not need to be provided with a blower such as the fan 6.

However, it is very troublesome to select a bulb-type fluorescent lamp having a blower such as a fan 6 or a bulb-type fluorescent lamp without a blower depending on the mounting direction of the bulb-type fluorescent lamp. It is. Since the temperature rise inside the cover 4 is suppressed regardless of the lighting direction of the fluorescent lamp 2, the light bulb shaped fluorescent lamp 1 of the above embodiment can be used regardless of the mounting direction to the appliance body or the like. .
In addition, since the bulb-type fluorescent lamp 1 is heated by the heat generated by the lighting circuit 5 at least inside the cover 4 even when the fluorescent lamp 2 is horizontally lit, the blown air by the fan 6 is warm and the fluorescent lamp 2 is It does not supercool.
That is, the fluorescent lamp 2 emits stable visible light.

[0042]

According to the first aspect of the present invention, the heat inside the cover is forcibly exhausted from the inside of the cover to the outside by the blowing means, so that even if the output of the fluorescent lamp is increased, the lighting circuit of the lighting circuit is not affected. The circuit component is cooled by the ventilation of the blower, and the temperature rise is suppressed, so that thermal destruction can be prevented.

According to the second aspect of the present invention, the air is ventilated from the inside of the cover to the outside by the blowing means through the air holes formed in the partition plate attached to the other end of the cover.
It is possible to suppress a rise in temperature inside the cover and to prevent moisture from entering the inside of the cover.

According to the third aspect of the present invention, the air is sucked into the inside of the cover from the outside through the gap formed between the one end of the cover and the base by the operation of the blowing means. A forced ventilation can be formed from the inside to the outside.

According to the fourth aspect of the present invention, since the power of the fluorescent lamp is 25 to 50 W, the amount of light from the fluorescent lamp is large, and the bulb-type fluorescent lamp can be used as a substitute for the HID lamp.

[Brief description of the drawings]

FIG. 1 is a schematic partially cutaway front view of a bulb-type fluorescent lamp showing an embodiment of the present invention.

FIG. 2 is a schematic bottom view of the bulb-type fluorescent lamp.

FIG. 3 is a partially cutaway front view of a conventional compact fluorescent lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fluorescent lamp 2 ... Fluorescent lamp 4 ... Cover 5 ... Lighting circuit 6 ... Fan as blowing means

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kunihiko Raft 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Toshiba Lighting & Technology Corporation F term (reference) 3K014 AA04 LA06 MA02 MA04 MA08 5C039 AA02

Claims (4)

[Claims] 1. A fluorescent lamp having a bent bulb in which a discharge medium made of mercury and a rare gas is sealed, a phosphor film is formed on an inner surface, and a pair of electrodes are sealed at both ends; A cover having a base and a fluorescent lamp attached to the other end; a lighting circuit housed in the cover and electrically connected to the base and the fluorescent lamp to turn on the fluorescent lamp; Blower means disposed on the side and operated to forcibly vent from the inside of the cover to the outside when the fluorescent lamp is turned on. 2. A partition plate is attached to the other end of the cover, a fluorescent lamp is attached to the partition plate, and a ventilation hole is formed in a portion of the partition plate surrounded by the fluorescent lamp. The bulb-type fluorescent lamp according to claim 1, wherein: 3. A gap is formed at one end side of the cover and communicates with the inside of the cover between the base and the base, and air is sucked into the inside of the cover from the gap by the operation of the blowing means. The bulb-type fluorescent lamp according to claim 1. 4. The bulb-type fluorescent lamp according to claim 1, wherein the electric power of the fluorescent lamp is 25 to 50 W.