JPH0620258Y2 - lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a lighting fixture fixed to a ceiling and provided with a globe surrounding a lamp.

[Prior Art] As a lighting fixture of this type, as shown in FIG. 3, a globe 4 surrounding a fixture body 1 fixed to a ceiling or the like and a lamp 3 held in a lamp socket 2 provided in the fixture body 1. When,
There is provided a body cover 5 that covers the lower surface side of lighting components such as a ballast 12 and a battery 13 attached to the instrument body 1. In this configuration, the lamp 3 and ballast 1
2. The surface temperature of the lighting parts does not exceed the standard value (for example, in the case of an emergency light, the surface temperature of the battery is 45 ° C or less) because heat is generated from the battery 13, the emergency light lighting circuit (not shown), etc. Need to do so. In order to achieve this object, conventionally, the volume of the portion surrounding the heat generating portion is increased so that when the heat generation and the natural heat radiation reach an equilibrium state, the volume is set to be equal to or lower than the standard value.

[Problems to be Solved by the Invention] In the above-mentioned conventional configuration, there is a problem in that since the external dimensions increase as the volume increases, the size becomes large and the appearance becomes poor, and the construction work is difficult to perform. Further, there is a problem that the material cost is increased due to the increase in size.

The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to provide a lighting fixture which is capable of efficiently radiating heat while being downsized.

[Means for Solving the Problems] In the present invention, in order to achieve the above object, a lamp socket for holding a lamp in a downwardly protruding shape is attached to a lower surface side and is attached to a ceiling surface, and an instrument main body. A body cover that is attached to the body and has a cylindrical partition wall that surrounds the vicinity of the lamp base and the periphery of the lamp socket, and that covers the periphery of the lighting component that is arranged on the opposite side of the lamp socket with the partition wall interposed therebetween, A glove is provided near the lower end of the partition wall, the upper end of which is attached to a receiver provided on the main body cover so as to wrap around the lamp, and the lower end of the main body cover is surrounded by the partition wall. In the lamp chamber, one end is opened near the base of the lamp and a lower ventilation gap is formed along the receiving member so as to introduce outside air into the lamp chamber, and the lighting parts are housed outside the lamp chamber. Lighting parts collection A communication hole for introducing outside air is formed in the lower part of the storage chamber, and an upper ventilation gap for discharging air from the upper part of the lamp chamber and the lighting component storage chamber is formed between the upper surface of the body cover and the ceiling surface. It has been done.

Moreover, it is desirable to form a heat insulating layer over the entire surface of the partition wall.

[Operation] According to the above configuration, outside air is introduced through the lower ventilation gap to the lower end of the lamp chamber surrounded by the partition wall in the inner space of the globe covering the lamp and the lamp socket and the partition wall, The air in the lamp chamber is discharged to the outside through the upper ventilation gap that communicates with the upper end of the lamp chamber.Therefore, when an upward airflow is generated in the internal space between the globe and the partition wall by the heat generated when the lamp is lit, the upper ventilation gap causes Outside air is introduced from the lower ventilation gap as hot air is discharged. Further, since one end of the lower ventilation gap on the lamp chamber side opens near the lamp base, the outside air introduced into the lamp chamber through the lower ventilation gap immediately contacts the vicinity of the base where the temperature is highest in the lamp. The temperature gradient near the base of the lamp is increased, and the so-called chimney effect increases the flow velocity of the ascending air current. Thus, as a result of the rapid ventilation of the lamp chamber, the temperature rise in the lamp chamber is suppressed.

Further, by providing the partition wall between the flow path through which the hot air heated by the lamp passes and the space for housing the lighting component, the thermal influence on the lighting component can be reduced.

Moreover, a ventilation hole communicating with the lighting component storage chamber storing the lighting components is formed at the lower end of the main body cover,
Since the air in the lighting component storage chamber is discharged to the outside through the upper ventilation gap, if the temperature inside the lighting component storage chamber rises,
Since an ascending air current is generated as in the lamp chamber, the hot air can be quickly discharged and the outside air can be introduced to suppress the temperature rise in the lighting component storage chamber.

That is, by separating the internal space of the main body cover into the lamp chamber and the lighting component storage chamber via the partition wall,
Ascending air currents are generated separately in the lamp chamber and the lighting component storage chamber. In addition, the temperature rises in the lamp chamber and the lighting component storage chamber are suppressed by the different rising airflows, respectively, and moreover, the rising airflow generated in the lamp chamber and the lighting component storage chamber and the partition wall prevent heat from the lamp chamber to the lighting components. It will cut off the transmission. In particular, in the lamp chamber where the temperature becomes high, the flow velocity of the ascending airflow is high due to the chimney effect, and the temperature rise can be suppressed by the high heat radiation efficiency. As a result, the heat dissipation efficiency is increased, and the heat insulation effect between the lamp and the lighting component is increased, so that the thermal influence from the lamp to the lighting component can be suppressed even when the size is reduced. .

Furthermore, if a heat insulation layer is formed over the entire surface of the partition wall, thermal insulation between the lamp chamber and the lighting components will be ensured, and the amount of heat released through the partition wall will be reduced. The speed of movement of air is increased, and the speed of introduction of cool air into the lamp chamber is increased.

Example 1 In the following description, an example in which the battery 13 is incorporated like an emergency light is shown, but the invention is not necessarily limited to this.

As shown in FIG. 1, the fixture body 1 is adapted to be mounted on the ceiling 11, and the lamp socket 2 is fixed to the lower surface of the fixture body 1. A lamp 3 such as a fluorescent lamp is held in the lamp socket 2 so as to project downward.
The circumference of the lamp 3 is covered with a globe 4 made of a translucent material such as glass. A step portion 4a is formed on the upper portion of the globe 4, and a screw portion 4b is formed above the step portion 4a. A body cover 5 is attached to the lower surface of the instrument body 1, and a receiver 5a is fixed to the lower end of the body cover 5. The receiving part 5a is formed with a screw part 5b which is fitted to the screw part 4b. Therefore, the globe 4 is held by the instrument body 1 via the body cover 5.
Here, between the globe 4 and the main body cover 5, a lower ventilation gap 6 that is bent in a substantially L-shaped cross section is formed. The main body cover 5 has a partition wall 5c formed in a cylindrical shape so as to surround the lamp socket 2, and the peripheral surface is formed in a tapered shape whose diameter increases toward the top. Therefore, the lower surface side of the lighting components such as the ballast 12 and the battery 13 attached to the lower surface of the instrument body 1 is covered with the body cover 5. When the body cover 5 is attached to the instrument body 1, an upper ventilation gap 7 is formed between the upper surface of the body cover 5 and the ceiling 11. The portion surrounded by the partition wall 5c forms the lamp chamber 8 and communicates with the inside of the globe 4, so that the heat generated from the lamp 3 is accumulated in the lamp chamber 8. The lamp chamber 8 communicates with the outside through the lower ventilation gap 6 and the upper ventilation gap 7.

With the above configuration, when heat is accumulated in the lamp chamber 8 due to heat generation of the lamp 3, the hot air rises and the upper ventilation gap 7
Is discharged to the outside from the outside, and at the same time, outside cool air is introduced into the lamp chamber 8 from the lower ventilation gap 6. Therefore, the heat of the lamp 3 is efficiently discharged, and the thermal influence on the lighting components such as the ballast 12 and the battery 13 can be reduced. Further, one end of the lower ventilation gap 6 which faces the lamp chamber 8 is near the coupling portion of the lamp 3 to the lamp socket 2,
That is, the lamp 3 opens near the base. Since the lamp 3 has the highest temperature in the vicinity of the base, the outside air introduced from the lower ventilation gap 6 immediately contacts the highest temperature portion in the lamp chamber 8. In this way, the temperature gradient near the base of the lamp 3 is increased, so that the flow velocity of the air introduced from the lower ventilation gap 6 can be increased. That is, the lower ventilation gap 6
Therefore, the efficiency of introducing air into the lamp chamber 8 can be made high, and the heat dissipation efficiency can be made high. Also, the lamp room 8
Is surrounded by the partition wall 5c, and the ballast 12 and the battery 13 are disposed outside the lamp chamber 8. Therefore, the lamp 3 having a large amount of heat generation and the lighting parts such as the ballast 12 and the battery 13 It is possible to suppress the thermal influence between and.

By the way, at the lower end of the main body cover 5, a ventilation hole 10 for introducing outside air is opened at a lower portion of the lighting component storage chamber 14 in which the lighting components are stored outside the partition wall 5c. The upper end of the lighting component storage chamber 14 communicates with the upper ventilation gap 7. Therefore, if the temperature of the lighting component storage chamber 14 rises due to heat generation of the lighting component, air in the lighting component storage chamber 14 is discharged to the outside through the upper ventilation gap 7, and at the same time, the lighting component storage chamber 14 passes through the ventilation hole 10. Air will be introduced into. In this way, the internal space of the main body cover 5 is divided into the lamp chamber 8 and the lighting component storage chamber 14 by the partition wall 5c, and an ascending airflow can be separately generated to discharge hot air. That is, the lamp 3 and the lighting component are separately air-cooled, and two updrafts and the partition wall 5c are present between the lamp 3 and the lighting component to be thermally isolated from each other. Due to the chimney effect, the temperature rise in the lamp chamber 8 is suppressed. As a result, the surface temperature of the lighting component can be prevented from exceeding the standard value even if the size is made smaller than the conventional one, and the effects such as improvement in appearance, improvement in workability, and reduction in material cost can be obtained.

[Embodiment 2] In this embodiment, as shown in FIG. 2, a heat insulating layer 9 is formed over the entire surface of the partition wall 5c. According to this configuration, the heat conduction between the lamp chamber 8 and the inside of the main body cover 5 can be further reduced, and the heat radiation through the partition wall 5c is reduced. Therefore, the rising speed of the hot air near the partition wall 5c is reduced. Therefore, the air in the lamp chamber 8 can be replaced more quickly. That is,
The so-called chimney effect improves the rate of introduction of cold air. Further, the thermal insulation between the lamp chamber 8 and the inside of the main body cover 5 is ensured, and the influence of the heat generated from the lamp 3 on the lighting parts can be further reduced as compared with the first embodiment. The other configuration is the same as that of the first embodiment, and thus the description thereof is omitted.

[Advantages of the Invention] The present invention has the above-described configuration, and the internal space of the main body cover is divided into a lamp chamber and a lighting component storage chamber by a partition wall, and rises separately in the lamp chamber and the lighting component storage chamber. An air flow can be generated. Also,
It is possible to discharge the hot air between the lamp chamber and the lighting component storage chamber to the outside by the rising airflow generated separately, and at the same time to introduce the cool air, and suppress the temperature rise in the lamp chamber and the lighting component storage chamber, respectively. Can be done. In particular, one end of the lower ventilation gap opens near the lamp cap to introduce outside air into the lamp chamber, so that the outside air introduced from the lower ventilation gap into the lamp chamber immediately contacts the lamp cap where the temperature is highest. Can be
By increasing the temperature gradient near the base of the lamp and increasing the flow velocity of the ascending airflow by the so-called chimney effect, high heat dissipation efficiency can be obtained. Moreover, the rising airflow generated in the lamp chamber and the lighting component storage chamber and the partition wall block the transfer of heat from the lamp chamber to the lighting component. As a result, an ascending air current is generated in each of the lamp chamber and the lighting component storage chamber to increase the heat dissipation efficiency, and particularly in the lamp room where the temperature becomes high, it is possible to suppress the temperature rise by enhancing the heat dissipation effect by the chimney effect, and ,
Due to the generation of updrafts and the presence of the partition wall, the heat insulation effect between the lamp and the lighting component is enhanced, and the synergistic effect of the heat radiation effect including the chimney effect and the heat insulation effect,
This has the effect of suppressing the thermal influence of the lamp on the lighting components and reducing the overall size.

Further, when the heat insulating layer is formed over the entire surface of the partition wall, the thermal insulation between the lamp chamber and the lighting component is ensured, and the amount of heat radiation through the partition wall is reduced.
The so-called chimney effect increases the moving speed of air,
Since the rate of introduction of cold air into the lamp chamber is faster, and because the heat insulation layer is less likely to transfer the heat of the lamp chamber to the lighting components, the influence of the heat generated by the lamp on the lighting components is further reduced. You can do it.

[Brief description of drawings]

1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view showing a second embodiment of the present invention, and FIG. 3 is a sectional view showing a conventional example. 1 ... Instrument body, 2 ... Lamp socket, 3 ... Lamp, 4 ...
Gloves, 5 ... Main body cover, 5a ... Receptacle, 5c ... Partition wall, 6 ... Lower ventilation gap, 7 ... Upper ventilation gap, 8 ... Lamp chamber, 9 ... Thermal insulation layer, 10 ... Ventilation hole, 14 ... Lighting component storage chamber

Continuation of the front page (56) References JP 62-76201 (JP, A) JP 54-62672 (JP, A) Actual opening 49-115982 (JP, U) Actual opening 57-70605 (JP , U) Actual development Sho 49-150582 (JP, U) Actual public 37-24876 (JP, Y1) Actual public 55-3613 (JP, Y2)

Claims (2)

[Scope of utility model registration request] 1. A fixture main body having a lamp socket for holding the lamp in a downwardly projecting form, which is attached to a lower surface side and is attached to a ceiling surface, and a lamp socket attached to the fixture main body, around a lamp base and a periphery of the lamp socket. A main body cover that has an enclosing cylindrical partition wall that covers the periphery of the lighting component that is placed on the opposite side of the lamp socket with the partition wall sandwiched between it and the upper end of the receiver provided on the main body cover near the lower end of the partition wall. And a glove arranged so as to wrap around the lamp, the lower end of the main body cover having one end opened near the lamp cap in the lamp chamber surrounded by the partition wall. A lower ventilation gap is formed along the receiver so as to introduce the outside air into the chamber, and a communication hole for introducing the outside air is formed in the lower part of the lighting component storage chamber that stores the lighting components outside the lamp chamber. , The main unit Between the upper surface and the ceiling surface of the chromatography, the lamp chamber and the lighting part upper air gap for discharging air to the outside from the upper portion of the storage chamber is formed by comprising luminaire. 2. The lighting fixture according to claim 1, wherein a heat insulating layer is formed on the entire surface of the partition wall.