JPH0440679Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a germicidal lamp that sterilizes indoor air.

[Conventional technology]

Conventionally, if a person enters a room with germicidal lamps turned on and is exposed to germicidal rays (ultraviolet rays) in excess of the permissible radiation limit, this can cause problems such as eye damage and sunburn on the skin. Therefore, when a germicidal lamp is installed in a room where people enter for work or other purposes while the lamp is on, measures are taken to prevent people from being directly exposed to the germicidal rays. For example, as shown in FIG. 7, an indirect irradiation germicidal lamp 30 is used in which the lower and side surfaces are covered with a light shielding member 31 and the germicidal radiation is directed upward. Alternatively, as in the example shown in FIG.
There is a germicidal lamp 32 that takes out the germicidal rays through a glass 36 that has a low germicidal ray transmittance.

[The problem that the idea attempts to solve]

However, in the case of a completely indirect irradiation method such as the germicidal lamp 30 shown in FIG. 7, there is a problem in that it is difficult to check the lighting status of the lamp, making it difficult to determine maintenance. Furthermore, in the case of the germicidal lamp 32 shown in FIG. 8, maintenance can be determined through the transparent hole 35, but there is a problem in that the structure is complicated due to the risk of damage to the glass 36.

Therefore, the purpose of this invention is to provide a germicidal lamp with a simple structure and which allows easy confirmation of the lighting state of the lamp.

[Means to solve the problem]

The germicidal lamp of this invention is provided with a device body equipped with a germicidal lamp, and a cover having a transparent hole is attached to the device body to cover the front of the germicidal lamp, and the germicidal lamp is irradiated with light. In order to prevent the germicidal rays from reaching the light-transmitting hole, a light-shielding plate is provided between the germicidal lamp and the light-transmitting hole, and the surface facing the light-transmitting hole is a reflective surface. A reflecting plate is provided which reflects the sterilizing rays on the reflective surface of the light shielding plate and in a direction that allows the rays to pass through the light transmitting holes.

[Effect]

According to the germicidal lamp of this invention, the germicidal rays emitted from the germicidal lamp are reflected at one end by a reflector, and then reflected again by the reflective surface of the light-shielding plate and irradiated into the room through the transparent hole. The irradiance is attenuated by these two reflections, and the attenuated germicidal radiation allows the lighting state of the germicidal lamp to be confirmed. Moreover, since the irradiance is attenuated by reflection from the reflector and the light-shielding plate, there is no risk of breakage as with conventional glass, and the structure can be simplified.

〔Example〕

An embodiment of this invention will be explained based on FIGS. 1 to 6.

Figure 1 shows a cross-sectional view of the assembled state.
FIG. 2 shows an exploded perspective view thereof. In the figure, reference numeral 10 denotes a main body of the device, to which a socket 11, electrical components 12 such as a ballast, and a reflector 13 are attached. Then, insert germicidal lamp 1 into socket 11.
Attach 4. Further, 15 is a cover, and an irradiation window 16 is formed on a pair of facing sides,
A transparent hole 17 extending along the sterilizing lamp 14 for confirming lamp lighting is formed on the lower surface. The cover 15 is fixed to the socket base 23 of the instrument body 10 with mounting screws 22. Furthermore, cover 15
A light shielding plate 1 is provided on the inner surface of the sterilizing lamp 14 between the sterilizing lamp 14 and the transparent hole 17 and extending along the sterilizing lamp 14.
8 is installed. The light shielding plate 18 has transparent holes 17
It is formed into a chevron shape with a size that covers the entire area, and the lower surface is a reflective surface 19 finished with an aluminum mirror finish. Along both sides of the light shielding plate 18, reflective plates 20 and 21 made of mirror-finished aluminum are provided. The reflection plates 20 and 21 have a light shielding plate 1 between them.
8, and bent pieces 20b, 21b formed by bending the lower ends of the vertical pieces 20a, 21a in the direction of the transparent hole 17.
Next, the course of the germicidal radiation irradiated from the germicidal lamp 14 will be explained using FIGS. 3 and 5. In FIG. 3, a rising piece 24 is provided around the transparent hole 17. As shown in FIG. All the germicidal radiation La that has entered the upper surface of the light shielding plate 18 is reflected upward.
Also, the vertical pieces 20a, 21a of the reflecting plates 20, 21
All the sterilizing rays Lb that have entered the sterilizing ray Lb are blocked by the light shielding plate 18 and the rising piece 24 and do not reach the light transmitting hole 17.
Furthermore, the bent pieces 20b, 21 of the reflecting plates 20, 21
The bactericidal Lc that has entered b is reflected again by the reflective surface 19 of the light shielding plate 18 and is irradiated into the room through the light shielding hole 17. In this way, the germicidal ray Lc irradiated from the light shielding hole 17 is directed toward the bent piece 20b, as shown in FIG.
It is irradiated from the thick line portion 14a of the sterilizing lamp 14 that can enter the sterilizing lamp 14. Similarly, the sterilizing radiation that enters the bent piece 21b is irradiated from the thick line portion 14b of the sterilizing lamp 14. Here, the relationship between the sterilizing radiation irradiated from the sterilizing lamp 14 and its illuminance will be explained using FIG. 5. The germicidal line Ld perpendicular to the outer circumferential surface of the germicidal lamp 14 has a high radiation intensity, and the germicidal line Le in the tangential direction of the outer circumferential surface has a small radiation intensity. The sterilizing rays Lc irradiated from the thick line parts 14a, 14b of the sterilizing lamp 14 to the bent pieces 20b, 21b in FIG.

FIG. 6 shows a perspective view of the germicidal lamp in an assembled state. In addition, as shown in FIG.
The germicidal ray Lf irradiated from 4 is applied to the upper and lower reflectors 1.
3, 20, and 21 and is irradiated into the room through the irradiation window 16, thereby sterilizing the indoor air.

According to the germicidal lamp configured in this way, the germicidal radiation Lc irradiated from the germicidal lamp 14 is once reflected by the bent pieces 20b, 21b of the reflectors 20, 21, and
It is reflected again by the reflective surface 19 of the light shielding plate 18 and the light transmitting hole 1
The room is irradiated from 7. Since the reflectance on the aluminum mirror surface is about 40%, the illuminance is attenuated to about 16% by these two reflections. The lighting state of the germicidal lamp 14 can be confirmed by the germicidal line Lc which has been attenuated and has become below the allowable irradiance.
Moreover, the sterilization rays entering the bent pieces 20b and 21b
Since Lc is a light beam with low radiation intensity in the tangential direction of the outer peripheral surface of the germicidal lamp 14, it can be reliably attenuated to below the allowable irradiance.

Further, since the illuminance is attenuated by utilizing the reflection from the light blocking plate 18 and the reflecting plates 20 and 21, it can be easily applied even if the form of the fixture changes.

In addition, by changing the angles of the reflectors 20, 21 and the light shielding plate 18 and changing the illuminance of the germicidal radiation irradiated from the germicidal lamp 14 that can pass through the transparent hole 17, the illuminance of the germicidal radiation Lc taken out into the room can be freely adjusted. can be changed to

Furthermore, the light shielding plate 18 and the reflecting plates 20, 21
Since these are provided symmetrically, the sterilizing wire can be taken out uniformly from the transparent hole 17.

Note that the germicidal radiation may be reflected by three or more reflective plates and taken out into the room.

[Effect of idea]

According to the germicidal lamp of this invention, the germicidal radiation emitted from the germicidal lamp is reflected at one end by the reflector, then reflected again by the reflective surface of the light-shielding plate, and then irradiated into the room through the light-transmitting hole. The irradiance is attenuated by these two reflections, and the attenuated germicidal radiation allows the lighting state of the germicidal lamp to be confirmed. Moreover, since the irradiance is attenuated by the reflection from the reflector and the light shielding plate, there is no risk of breakage as with conventional glass, and the structure can be simplified.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of one embodiment of this invention, Figure 2 is an exploded perspective view of the same, Figure 3 is a cross-sectional view showing the path of the sterilizing ray, and Figure 4 is the ability to pass through the light-transmitting hole. 5 is an explanatory diagram showing the relationship between the sterilizing line and the illuminance, FIG. 6 is a perspective view of the assembled state, and FIG. 7 is a front view of the conventional example.
FIG. 8 is a sectional view of another conventional example. 10... Instrument body, 14... Germicidal lamp, 15
... Cover, 17 ... Transparent hole, 18 ... Light shielding plate,
19... Reflective surface, 20, 21... Reflective plate.

Claims (1)

[Scope of utility model registration request] a device body equipped with a sterilizing lamp; a cover attached to the device body to cover the front of the sterilizing lamp and having a transparent hole in front of the sterilizing lamp; a light-shielding plate provided between the sterilizing lamp and the light-transmitting hole so as not to reach the light-transmitting hole, and with a surface facing the light-transmitting hole serving as a reflective surface; A sterilizing lamp, comprising: a reflecting plate that reflects the light on the reflective surface of the light shielding plate and in a direction that allows the light to pass through the light transmitting hole.