JPS58181262A - Fluorescent lamp device - Google Patents

Abstract

PURPOSE:To prevent any reduction of the optical output of a fluorescent lamp device by maintaining the temperature of the tube wall of a non-linear fluorescent lamp low by packing silicone between the fluorescent lamp and a globe when the fluorescent lamp is sealed in the globe. CONSTITUTION:A mount structure 3 which supports both a non-linear fluorescent lamp 1 having a U shape or the like and a glow starter 2 is sealed with both a case 5 provided with a ballast 4 and having a base 6 and a globe 7 made of glass or ghe like, so that an incandescent lamp can be substituted for the mount structure 3. In addition, a silicone 8 is packed so that it touches both the outer surface of the fluorescent lamp 1 and the inner surface of the globe 7. Therefore, due to the silicone 8, since the wall temperature of the part of the fluorescent lamp 1 which touches the silicone 8 can be maintained almost equal to that of the outer surface of globe 7, the optical output decrease of the lamp 1 can be reduced despite its compactness by restricting the vapor pressure of mercury contained in the tube 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluorescent lamp device, and more particularly to a fluorescent lamp device configured to seal a non-linear fluorescent lamp in a globe.

Conventionally, single-cap fluorescent lamp devices have been known, in which a non-linear fluorescent lamp formed in a U-shape or sheath shape is housed together with a lighting device in a plastic or glass globe, and a light bulb cap is attached to the globe. It is being

Since such devices are intended to be used in place of incandescent light bulbs, they are required to be compact, and for this reason, it is necessary to store the fluorescent lamp and the stabilizer in a limited space. . However, when a non-linear band lamp is hermetically housed in a small-volume globe, the temperature of the tube wall of the fluorescent lamp rises and reaches above the optimum mercury vapor pressure temperature, resulting in the luminous efficiency of the fluorescent lamp. decreases significantly.

One way to solve this problem is to provide multiple ventilation holes in the glove and ballast compartments to cool the tube wall of the fluorescent lamp. According to this method, although it is possible to suppress a decrease in luminous efficiency, it is not only unsightly because insects and other insects can enter through the ventilation holes when the light is on, but also because dust and other particles are absorbed from the outside by thermal convection. These particles accumulate on the bulb, lowering the transmittance of the globe, which leads to problems such as poor luminous flux maintenance during lighting.

The present invention lowers the temperature of the tube wall of a non-linear fluorescent lamp even when the non-linear fluorescent lamp is sealed inside a globe and is turned on.
It is an object of the present invention to provide a fluorescent lamp device that can suppress a decrease in luminous efficiency by regulating mercury vapor pressure.

That is, the present invention is characterized by a fluorescent lamp device in which a non-linear fluorescent lamp is sealed with a globe, and silicone is filled between the non-linear fluorescent lamp and the globe.

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

1 and 2 are a front sectional view and a side sectional view, respectively, of a single-capped fluorescent lamp device according to an embodiment of the present invention. In FIG. 1, a non-linear fluorescent lamp 1 and a lighting tube 2 are shown.
The mount structure 3 supporting the non-linear fluorescent lamp 1 is configured to be sealed with a case 6 having a ballast 4, a base 6, and a globe 7 made of glass or translucent resin. Silicone 8 is filled between the outer wall surface and the inner wall surface of the glove 7 so as to contact them. In addition, in the same figure, the case 5 and the cap 6 are the insulator 9.
The purpose of this connection is to electrically insulate the base 6 and the case 5 when the case 7 is made of metal. If the case is electric. Furthermore, the connection between the case end, the mount structure, and the glove 7 is performed using an adhesive 10. Also, when installing the stabilizer 4 to the case 5, attach the eyelet 1.
1 etc. is used at Shidatakuichime.

The fluorescent lamp shown in this example has a tube outer diameter of approximately 16,111 m and a distance between electrodes of approximately 270 m, and is a double-bend type that is made compact by forming a linear fluorescent lamp into a U-shape and then bending it into a U-shape again. It's a fluorescent light. The phosphor can be used as appropriate depending on the purpose, similar to conventional fluorescent lamps, but in this example, a rare earth phosphor was used and the color temperature was adjusted to 2800K.

Now, when the non-linear fluorescent lamp is used alone in the air, the tube current is 0.
．． When lit at 23A, it consumes about 9W of power and about 65
A luminous flux of 0.7 m is obtained.

However, this fluorescent lamp was installed in a case 5 equipped with a glass globe with a diameter of about 708 cm and a length of SOW and a ballast 4.
When lit in a sealed state, the tube wall temperature of a non-linear fluorescent lamp increases even with the same ballast, and the mercury vapor pressure inside the tube increases, resulting in an increase in the tube current to approximately 5 l゛ · 0.27 A. The luminous flux decreased to about 450 tm.

Generally, the optimum mercury vapor pressure for fluorescent lamps is approximately 40
It is well known that the luminous flux can be obtained when the tube current is There is almost no increase in luminous flux.

In the present invention, by filling the space between the non-linear fluorescent lamp 1 and the globe 7, the tube wall temperature of the portion of the non-linear fluorescent lamp 1 in contact with the silicon 8 can be adjusted to the outer wall temperature of the globe. By keeping the mercury vapor pressure almost the same, the mercury vapor pressure inside the tube is regulated and a decrease in luminous flux is prevented.

That is, as shown in FIG.
By filling the tube with 0q and thermally bonding, the tube current was 0.27 A and the luminous flux was 450 Am when the tube was simply sealed, whereas the tube current was 0.24 A when using the same ballast.
A. The luminous flux became s o o 1m6t". The decrease in the tube current when lit with the same ballast indicates that the mercury vapor pressure inside the tube has clearly decreased, and the luminous flux decreases accordingly. The rate has also been reduced.

FIG. 3 shows another embodiment of the present invention, in which the entire inside of the glove 7 is filled with silicone 8,
Although the effect of lowering the tube wall temperature is greater than that of the previous embodiment, it is heavier in terms of weight.

In the present invention, silicone is used to fill the space between the non-linear fluorescent lamp 1 and the globe 7 and to thermally couple them together for the following reason.

In other words, in the case of the present invention, in which the heat of the fluorescent lamp tube wall is well conducted to the globe through thermal bonding, materials with high thermal conductivity are preferable, and when only thermal bonding is considered, metals and the like are preferable. However, in order to increase the luminous flux, it must be made of a material that absorbs as little light as possible, that does not deteriorate or discolor due to temperature or ultraviolet rays during lighting, and that does not emit corrosive gases.

However, in order to maintain good heat conduction, it is important that the filling surfaces have high density and adhesion to each other, and it is also preferable that the material is easy to work with and is inexpensive. Furthermore, since fluorescent lamps are made of glass tubes that are easily damaged, if a thermal bonding material is filled between this and the glass globe, the glass tube must be resilient enough to withstand vibrations and shocks. is also necessary.

This is because silicone is the most suitable material that satisfies all of these conditions.

The silicone used in the present invention includes rubber compounds, RTV rubber (Room Temperature
reVulcanizing 5ilicone Ru
Bber), sealant, etc. are suitable, but among them, RTV rubber is the most preferable in terms of translucency and workability.

This type of silicone is one-component or two-component, and is a relatively viscous liquid at room temperature, but when heated, it hardens in a short time and becomes rubber-like or gel-like. Excellent translucency can be achieved by using transparent silicone.

Silicone has a lower thermal conductivity than metal or glass. Therefore, a small amount of glass fiber, glass beads, fine alumina powder, zinc oxide, or metal powder may be mixed into transparent silicone for the purpose of increasing thermal conductivity.

In the embodiments of the present invention, a double-bend type fluorescent lamp is used, but the effects of the present invention can be similarly applied to other non-linear fluorescent lamps, such as U-shaped fluorescent lamps. The following effects can be obtained.

In the above embodiments, a fluorescent lamp device with a built-in ballast has been described, but it goes without saying that the present invention can also be implemented in a device with a separate ballast.

As explained above, the present invention has a structure in which a non-linear fluorescent lamp is sealed inside a globe, and by filling the space between the non-linear fluorescent lamp and the globe with 7 recone, the present invention is compact and yet Since the decrease in light output is small, it has great practical value as a fluorescent lamp device that can be used in place of a light bulb.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of a fluorescent lamp device which is an embodiment of the present invention, Fig. 2 is a side sectional view thereof, and Fig. 3 is a sectional view of a fluorescent lamp device which is another embodiment of the present invention. It is a diagram. 1...Non-linear fluorescent lamp, 7...Glove, 8...Silicone.

Claims (1)

[Claims] The non-linear fluorescent lamp is configured to be sealed with a globe,
A fluorescent lamp device characterized in that silicone is filled between the non-linear fluorescent lamp and the globe.