JPH012203A - fluorescent lamp device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention accommodates lighting circuit components in a cover having a cap at one end, and has a bent shape or the like at the other end of the cover. The present invention relates to a single-capped fluorescent lamp device that supports a fluorescent lamp, and relates to a fluorescent lamp device that prevents heat transfer from the fluorescent lamp to lighting circuit components.

(Prior Art) Conventionally, a ballast or high-frequency ignition circuit component is housed in a cover with a screw-in base for an incandescent light bulb attached at one end, and a U-shaped, W-shaped, saddle-shaped, etc. Fluorescent lamp devices equipped with bent fluorescent lamps such as the following have been developed. This type of fluorescent lamp device is becoming popular as an energy-saving light source because it is compatible with incandescent light bulbs.

However, the fluorescent lamps used in this type of fluorescent lamp device are required to have high output because they are compactly arranged and concentrated in a limited space, and therefore the lamp itself generates an extremely large amount of heat. . The heat generated from such a high-output fluorescent lamp not only excessively increases the bulb temperature, but also causes heat transfer to the ballast or high-frequency lighting circuit components inside the cover, causing thermal damage.

In order to prevent such thermal effects, the opening at the other end of the cover is closed with a closing member to block the heat generated by the fluorescent lamp from reaching the lighting circuit components inside the cover through convection. being done.

Furthermore, in the past, fluorescent lamps were covered with semi-transparent gloves because it was said that the appearance of the fluorescent lamps was not good if they were exposed. The heat from the bulb gets trapped inside the globe, causing the lamp itself to become extremely hot, and as mentioned above, there is a risk of thermal damage to the ballast or high-frequency lighting circuit components inside the cover. For this reason, measures have been taken to stop the use of gloves and use the fluorescent lamps exposed.

However, even if the opening at the other end of the cover is closed with a closing member to block the heat, the heat from the fluorescent lamp will not be conducted through the closing member because the closing member itself has thermal conductivity. The heat may be transmitted to the lighting circuit components, and such acquiescence due to heat conduction cannot be ignored.

In addition, even if you use the fluorescent lamp exposed as in the latter case, recent fluorescent lamps of this type are becoming more and more high-output, and moreover, due to miniaturization, they are becoming denser and have smaller surface areas. The temperature of the lamp itself becomes high, and therefore, the cooling effect of exposing the lamp alone cannot prevent heating of the lighting circuit components from being transmitted through the closing member, which may cause thermal damage to the lighting circuit components.

For this reason, the present applicant has created a heat insulating air layer connected to the outside air in a closing member provided to close the opening of the cover, thereby transmitting energy from the fluorescent lamp toward the ballast and high-frequency lighting components. He proposed a fluorescent lamp device in which the heat that would otherwise be lost was blocked by this insulating air layer (Utility Application No. 57-57139).

In this device, a heat insulating air layer is formed on the closing member and is open to the outside air over the entire circumference of the circumferential side, and the heat insulating air layer suppresses heat conduction.

(Problems to be Solved by the Invention) Incidentally, the fluorescent lamp used in the fluorescent lamp device as described above generates a large amount of heat due to the electrodes, and therefore the temperature at the end portion where the electrodes are sealed becomes high. When a lamp with such a temperature distribution is attached to the closing member, a temperature difference will occur between the portion of the closing member facing the high-temperature end of the lamp and the other portions, and therefore the temperature will vary even within the insulating air layer. A difference occurs. Such a temperature difference causes heat exchange within the adiabatic air layer, resulting in a relatively high overall temperature and a substantially -like temperature distribution.

However, when the temperature distribution is averaged at such a high temperature, heat is conducted to the lighting circuit components inside the cover through the closing member, and there is a drawback that the thermal influence becomes particularly large on components that are sensitive to heat.

Therefore, it is an object of the present invention to provide a fluorescent lamp device that can prevent heat exchange within the heat insulating air layer and reduce thermal effects on lighting circuit components within the cover.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a fluorescent lamp device in which a heat insulating air layer is formed in a closing member, in which the heat insulating air layer is located at a portion that receives a lot of heat from the fluorescent lamp. It is characterized by dividing the area that receives less water in the circumferential direction by partition walls.

(Function) According to the present invention, the heat insulating air layer is partitioned in the circumferential direction by the partition wall, so that heat exchange is prevented within the heat insulating air layer, and the lighting circuit components that are weak in heat are arranged opposite to a low temperature area. It is possible to reduce thermal effects.

(Example) The present invention will be described below with reference to the first example shown in FIGS. 1 and 2.
This will be explained based on an example.

In the figure, reference numeral 1 denotes a cover made of synthetic resin. A cylindrical portion 2 is integrally formed at one end of the cover 1, and a base 3 is attached to the cylindrical portion 2.

The cap 3 is of a screw-in type, for example, an E26 type, and is fixed to the cylindrical portion 2 with a connecting agent, caulking, or the like.

A disk-shaped closing member 4 made of synthetic resin, for example, is attached to the opening at the other end of the cover 1.
The opening is closed. This closing member 4 is composed of a pair of disk-shaped partitions 5, 6 that are spaced apart in the axial direction, and these partitions 5, 8 are divided into partition walls 7, which will be described later.
They face each other with a distance between them. Therefore, a heat insulating air layer 8 is formed between these partition panels 5 and 6 which are spaced apart and facing each other. The heat insulating air layer 8 is communicated with the outside over the entire circumference.

A fitting locking portion 9 is formed in the opening at the other end of the cover 1, and one disc-shaped partition board 5 is locked to this fitting locking portion 9. Therefore, the inside of the cover 1 constitutes a room 10 separated from the outside by the closing member 4.

A high-frequency lighting circuit component 11 as a lighting circuit component is housed in the room 1O inside the cover 1.

The high frequency lighting circuit component 11 is attached to a circuit board 12, and this circuit board 12 is mounted on a support stand I3 provided on one disc-shaped partition board 5 of the closing member 4 and spaced apart from this partition board 5. Fixed.

Note that ventilation holes 14 are formed in the side wall of the cover 1 to communicate the room 10 with outside air.

For example, a bent fluorescent lamp 15 is attached to the other disc-shaped partition panel 6 of the closing member 4. As shown in FIG.

The bent fluorescent lamp 15 may be U-shaped, W-shaped, etc., but in this embodiment, two U-shaped glass bulbs 16 are used.
A fluorescent lamp is used in which a saddle-shaped discharge path is formed by arranging the lamps 16a and 16b side by side. That is, this fluorescent lamp 15 consists of two glass bulbs I that have been previously processed into a U-shape.
Ga, 18b are arranged parallel to each other and one end of each is fused and joined.

And the above two U-shaped glass bulbs l[ia, I
Stems 1g and 18 each having an electrode 17 and 17 are sealed to the other end of Gb.

These stems 18, 18 have a sealed capillary tube 19, 19 protruding from the stems 18, 18, leaving a slightly longer exhaust pipe, and the amalgam 20 is housed in the capillary tube 19 on the other side.

The thin tube 19 has a constricted portion 21 formed at its base side, and holds the amalgam 20 housed at the tip side so that it does not enter the inside of the bulb.

Note that a phosphor wave film (not shown) is coated on the inner surface of this bulb.

Such a bent fluorescent lamp 15 has both ends and a fused portion fixed to the other disk-shaped partition plate 6 of the closing member 4 via an adhesive 22.

The adhesive points of both ends and the fused portion of the fluorescent lamp 15 are hidden from the bottom side by a cover plate 23 made of synthetic resin. , or fixed by fitting.

In the fluorescent lamp 15 attached to the closing member 4 in this way, the thin tube 19 containing the amalgam 20 passes through the insertion hole 24 formed in the partition board 6 and the insulating air layer 8
It protrudes inward, passes through an insertion hole 25 formed in the partition panel 5, and protrudes into the room IO of the cover 1.

Therefore, the amalgam 20 housed in the thin tube 19 is cooled by the air in the heat insulating air layer 8.

Therefore, the heat insulating air layer 8 formed in the closing member 4
is formed between a pair of disk-shaped partition plates 5.6 that are spaced apart in the axial direction, and these partition plates 5.6 are connected to the partition wall 7.
... are spaced apart from each other to ensure an interval of about 3 to 10 mm.

As shown in FIG. 2, the partition walls 7 are formed in the radial direction, and divide the heat insulating air layer 8 into four, for example, in the circumferential direction. Therefore, each of the compartment spaces 8a, 8b, 8c, and 8d of the heat insulating air layer 8 has its outer periphery open to the outside air and is divided into adjacent spaces.

In this embodiment, each compartment space 8a, 8b, 8c
.

Of the 8d, 8a and 8b are opposed to the ends where the electrodes 17 and 17 of the fluorescent lamp 15 are sealed, and the other 8c,
The end portion on the fusion side is opposed to 8d. Therefore, the narrow tubes of the fluorescent lamps 15 are present in the compartment spaces 8a and 8b! 9°I9 is inserted through it.

The operation of the first embodiment having such a configuration will be explained.

The bent fluorescent lamp 15 generates heat while lit, but since the bent fluorescent lamp 15 is exposed directly to the outside, the heat of the lamp 15 is radiated to the outside air, and the temperature of the lamp 15 itself rises to a certain extent. Deterred.

However, the heat of the bent fluorescent lamp 15 is
Support 5 [! It is about to be transmitted to the cover 1 side through the closing member 4 which is closed. However, in the closing member 4,
A heat-insulating air layer 8 is formed between a pair of disk-shaped partitions 5.6 spaced apart in the axial direction, and since this heat-insulating air layer 8 is open to the outside air, this heat-insulating air layer 8 is free from fluorescent light. The heat of the lamp 15 is prevented from being transmitted to the cover 1 side through the closing member 4.

In particular, the heat insulating air layer 8 has partition walls 7 extending in the radial direction.
・A plurality of partitioned spaces 8a, gb, 8c, 8
d, heat exchange is prevented within the heat insulating air layer 8. Since the end portions of the fluorescent lamps 15 with sealed electrodes 17 and 17 are opposed to the compartment spaces 8a and 8b, the temperature of the compartment spaces 8a and 8b tends to rise, whereas the temperature of the other compartments tends to rise. Since the ends of the spaces 8c and 8d on the fusion pipe side face each other, the temperature of the partitioned spaces 8c and 8d does not rise that much. These high temperature parts 8a, 8b and low temperature parts 8c, 8d are connected to the partition wall 7...
Since the areas are separated by , there is no heat exchange, and therefore the temperature of the low temperature areas 8c and 8d does not increase any further due to heat inflow from the high temperature areas 8a and 8b.

For this reason, the high frequency lighting circuit component 1 housed within the cover 1
1, heat damage to the high-frequency lighting circuit component 11 can be prevented by selecting an orientation for mounting the circuit board 12 so that heat-sensitive components face the low-temperature parts 8c and 8d.

Note that for a 100V/17W type fluorescent lamp device configured as shown in Fig. 2, the amalgam 20 is housed in a thin tube 19 formed in the exhaust pipe of the bulb, and this thin tube is 19 penetrates the insertion hole 24 made in the partition panel 6 and projects into the heat insulating air layer 8.
Suppresses mercury vapor pressure inside the valve. That is, since amalgam is used as a mercury vapor generation source, amalgam has a lower mercury vapor pressure than pure mercury.

In particular, the amalgam 20 is housed in a capillary tube 19, and the capillary tube 1
Since the amalgam 9 is made to protrude into the insulating air layer 8, the amalgam 2
0 temperature can be maintained at the optimum operating temperature. Therefore, the mercury vapor pressure of the lamp during lighting is effectively suppressed, increasing luminous efficiency.

The present invention is not limited to the above embodiments.

That is, the heat insulating air layer 8 is divided into four divided spaces 8a.
, 8b, 8c, 8d, but not limited to
The number of divisions, the size of the divided compartment spaces, etc. can be selected as appropriate.

Further, the present invention can be practiced even in a fluorescent lamp device having a structure in which a bent fluorescent lamp 15 is covered with a transparent or semi-transparent globe 30, as shown as a second embodiment in FIG. It is possible.

Furthermore, it is also possible to use a choke coil type ballast in addition to the high frequency lighting circuit component 11 as the lighting circuit component.

Furthermore, the present invention provides three U-shaped fluorescent lamps as a bent fluorescent lamp.
It may be constructed by connecting letter-shaped bulbs, or it may be a saddle-shaped fluorescent lamp.

Furthermore, the factors that cause the temperature difference in the heat insulating air layer 8 are the locations that receive heat from the electrodes of the fluorescent lamp;
Therefore, the fluorescent lamp is not limited to a bent fluorescent lamp.

[Effects of the Invention] As explained above, according to the present invention, the insulating air layer is partitioned in the circumferential direction by the partition wall, so that heat exchange is prevented within the insulating air layer, and therefore heat is transferred opposite to the lower temperature area. Lighting circuit components that are vulnerable to heat can be placed therein, and the influence of heat on the lighting circuit components can be reduced and thermal damage can be prevented.

[Brief Description of the Drawings] Figures 1 and 2 show a first embodiment of the present invention, with Figure 1 being an overall sectional view and Figure 2 being a sectional view taken along line ■-■ in Figure 1. , FIG. 3 is an overall sectional view showing a second embodiment of the present invention. 1 cover, 8... cap, 4... closing member, 5.6.
... Partition board, 7... Partition wall, 8... Heat insulating air layer, 11... High frequency lighting circuit component, 15... Bent fluorescent lamp, 17... Electrode, 20... ...Amalgam, 30...Glove. Applicant's agent Patent attorney Takehiko Suzue No. 1 = Figure 2 No. 3 Cause

Claims (1)

[Scope of Claims] A cap is provided at one end of the cover, a closing member is provided at the opening at the other end, a lighting circuit component is housed within the cover, a fluorescent lamp is attached to the outside of the closing member, and the closing member is provided with a cap at the other end. In a fluorescent lamp device, the member is composed of a pair of partitions spaced apart in the axial direction to form an insulating air layer whose circumferential side is open to the outside air. A fluorescent lamp device characterized in that a part that receives a lot of heat and a part that receives a little heat are divided in the circumferential direction by a partition wall.