JP6998196B2 - Indirect lighting structure - Google Patents

Description

The present invention relates to an indirect lighting structure of a room, and more particularly to an indirect lighting structure applicable to a duct type air conditioning system.

In a room of a building such as an office building or a public facility, it is common that a plurality of lighting fixtures are regularly arranged on a flat ceiling surface. On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 2014-126313 (Patent Document 1), in a building such as an office building, a connecting member is provided through a lower surface opening of a rectangular duct for air conditioning arranged on the ceiling. A duct type air conditioning system that can be equipped with an air control port unit and a lighting unit has been conventionally proposed.

In addition, regardless of the office building, indirect lighting that illuminates the room of the building by irradiating the light from the lighting equipment toward the wall surface or ceiling surface and using the light reflected by the wall surface or ceiling surface as illumination light is used. , Has been known for some time. For example, Japanese Patent Application Laid-Open No. 2012-48975 (Patent Document 2) includes a wavelength conversion sheet attached to the ceiling surface of a room and a light source device having an ultraviolet LED that radiates ultraviolet light toward the wavelength conversion sheet. Indirect lighting devices are disclosed.

Japanese Unexamined Patent Publication No. 2014-126313 Japanese Unexamined Patent Publication No. 2012-48975

The duct type air conditioning system described in Patent Document 1 has an advantage that the resident can select the unit to be mounted on the lower surface opening of the duct according to his / her preference, but the air control port unit and the lighting unit are on the lower surface of the duct. Due to the irregular arrangement, it is difficult to balance air conditioning and lighting. In addition, the resident who is directly under the lighting unit may feel the light from the lighting unit dazzling.

On the other hand, when the indirect lighting device as in Patent Document 2 is arranged, the light from the light source device (lighting tool) of the indirect lighting device illuminates the ceiling surface, so that the light from the lighting tool does not feel dazzling. .. However, in a general indirect lighting structure, the brightness of the bottom surface is high because the illumination light does not hit the portion lower than the ceiling surface to be irradiated, that is, the bottom surface of the base portion (installation table) on which the luminaire is placed. Run short. Therefore, for example, when the area of the bottom surface of the base portion (or the portion continuous thereto) is relatively large, or when the base portion is arranged away from the outer peripheral portion of the room, the base portion may be used. Residents may feel dissatisfied with the dark bottom.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an indirect lighting structure capable of increasing the brightness of the bottom surface of a base portion on which a luminaire is placed. That is.

An indirect lighting structure according to an aspect of the present invention includes a base portion that is spaced downward from the ceiling surface of the room, a lighting fixture that is fixed on the base portion and emits light toward the ceiling surface, and a base. It is provided with a light guide member which is arranged so as to penetrate the portion and guides a part of the light of the illuminating tool downward beyond the base portion.

Preferably, the indirect illumination structure further comprises a light diffusing member that diffuses the light guided downward of the base portion through the light guide member to the surroundings.

The light diffusing member is composed of, for example, a light guide plate connected to the lower end of the light guide member and a light diffusing film provided on the lower surface of the light guide plate. Alternatively, the light diffusing member includes a light guide plate connected to the lower end of the light guide member, and the light guide plate has a lower surface that has been subjected to light diffusion treatment.

Preferably, the indirect lighting structure is arranged along the lower surface of the base portion while being connected to the lower end of the light guide member, and further includes a light guide plate having a larger area than the cross-sectional area of the light guide member.

It is desirable that an opaque reflective material is arranged between the lower surface of the base portion and the light guide plate.

Further, it is desirable that the outer peripheral surface of the portion of the light guide member that penetrates the base portion is covered with an opaque reflective material.

Preferably, the light guide member is made of a transparent acrylic resin.

If the ceiling of the room has a bottom and sides and a duct that guides air is arranged, the base is arranged so as to project laterally from the side so as to be continuous with the bottom of the duct. May be good.

According to the present invention, the brightness of the bottom surface of the base portion can be increased without separately providing a lighting fixture on the bottom surface of the base portion.

It is sectional drawing which shows the schematic structure of the duct air-conditioning / lighting integrated system which concerns on embodiment of this invention. It is a top view which shows the schematic structure of the duct air-conditioning / lighting integrated system which concerns on embodiment of this invention. It is a top view which shows the schematic structure of the duct air-conditioning / lighting integrated system which concerns on embodiment of this invention. It is sectional drawing which shows typically the air flow by the duct air-conditioning-lighting integrated system which concerns on embodiment of this invention. It is a figure which shows the appearance that the duct air-conditioning / lighting integrated system which concerns on embodiment of this invention is provided in an office. It is sectional drawing which shows typically the indirect lighting structure which concerns on embodiment of this invention. It is sectional drawing which shows typically the indirect lighting structure which concerns on embodiment of this invention. It is a perspective view which shows the structural example of the member included in the indirect lighting structure which concerns on embodiment of this invention. It is a figure which shows the state which looked up the ceiling surface (including the part with a step) of a room from the bottom, and (A) is the schematic of the lighting effect when the indirect lighting structure which concerns on embodiment of this invention is applied. (B) is a diagram schematically showing an indirect lighting effect of a comparative example. It is a perspective view which shows the other structural example of the member included in the indirect lighting structure which concerns on embodiment of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals and the description thereof will not be repeated.

In this embodiment, the indirect lighting structure mounted on the duct air-conditioning / lighting integrated system will be described. The duct air-conditioning / lighting integrated system integrates duct air-conditioning and lighting that supply air by using ducts installed in ceiling spaces, for example, in office buildings and buildings such as public facilities. It is a formed system.

(About the outline structure of the duct air conditioning / lighting integrated system)
First, the schematic structure of the duct air-conditioning / lighting integrated system 100 will be described with reference to FIGS. 1 to 5. The duct air-conditioning / lighting integrated system 100 includes an air-conditioning unit 10 and a lighting tool 30 attached to the air-conditioning unit 10 for indirect lighting. It should be noted that FIGS. 1 to 5 do not show the details of the indirect lighting structure including the illuminating tool 30.

As shown in FIGS. 1 to 3, the air conditioner 10 is arranged on the ceiling CL of the room R, has an air outlet 11a, and is arranged along the ceiling CL to blow air from the air conditioner 11. A duct 12 for guiding the air A blown out from the outlet 11a and sending the air A to the room R is provided. The arrows in FIGS. 1 to 3 indicate the flow of air.

The room R includes a first wall portion W1 and a second wall portion W2 arranged so as to face each other. The first wall portion W1 or the second wall portion W2 is provided with, for example, a window W. In the room R, for example, a plurality of desks D, a plurality of sets of chairs C, a bookshelf BS, a partition shelf PS, and the like are arranged as in a general office or the like.

In the present embodiment, the air conditioner 11 can use a general air conditioner, and is used for, for example, a ceiling cassette type air conditioner, a ceiling cassette type air purifier, and the like.

In the present embodiment, the duct 12 is formed so as to extend from the vicinity of the first wall portion W1 to the vicinity of the second wall portion W2. The X direction shown in FIG. 2 corresponds to the longitudinal direction (extending direction) of the duct 12.

The duct 12 has a pair of side portions 13 arranged along the X direction and a bottom portion 14 arranged downward away from the ceiling CL. The pair of side portions 13 and the bottom portion 14 are each formed in a plate shape. Each side portion 13 is arranged so as to rise upward from the bottom portion 14 and is connected to the ceiling CL at the upper end.

A plurality of openings 15 for sending air A toward the room R are formed in each side portion 13 of the duct 12. The plurality of openings 15 are provided at intervals along the longitudinal direction of the duct 12. As a result, the air A blown out from the outlet 11a is sent out in the substantially horizontal direction along the ceiling surface (the surface of the ceiling CL).

Further, the duct 12 is provided with a suction port 12b. The suction port 12b is provided, for example, at the bottom portion 14. The suction port 12b may be provided in the vicinity of the air outlet 11a. The suction port 12b is formed, for example, in a mesh shape.

As shown in FIG. 4, the so-called perimeter zone near the first wall portion W1 (second wall portion W2) receives, for example, direct sunlight, and therefore has a large heat load. Therefore, the end portion 12a of the duct 12 may be formed with an outlet 16 for blowing air A toward the first wall portion W1 and the second wall portion W2. By preferentially blowing the air A from the duct 12 from the outlet 16 to the perimeter zone, the efficiency of the heat treatment in the perimeter zone can be improved.

In the present embodiment, the bottom portion 14 of the duct 12 extends in the horizontal direction and is formed in a flat shape. In the present embodiment, the bottom portion 14 of the duct 12 is formed in a flat shape, but the present invention is not limited to this, and for example, the bottom portion 14 of the duct 12 may be formed in an arc shape. In the present embodiment, heat dissipation from the bottom 14 of the duct 12 (see the arrow at the bottom 14 of the duct 12 in FIG. 3) contributes to reducing the vertical temperature difference of the duct air-conditioning / lighting integrated system 100. do.

(About indirect lighting structure)
Next, the indirect lighting structure 1 according to the present embodiment will be described with reference to FIGS. 6 and 7. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG.

The indirect lighting structure 1 includes a base portion 31 arranged so as to project laterally from both side portions 13 of the duct 12. The luminaire 30 is fixed on the base portion 31. The illuminating tool 30 radiates light toward the ceiling surface and indirectly illuminates the room R by the reflected light. A light reflecting film (not shown) that reflects the light emitted from the illuminating tool 30 or a light diffusing film (not shown) that diffuses the light radiated from the illuminating tool 30 is provided on the ceiling surface. It may have been done.

The base portion 31 is a plate-shaped member arranged downward from the ceiling surface of the room R at intervals, and is provided so as to be continuous with the bottom portion 14 of the duct 12. Specifically, the lower surface of the base portion 31 is arranged flush with each other without a boundary with the lower surface of the duct 12 (lower surface of the bottom portion 14). In other words, the bottom portion 14 of the duct 12 has a portion (jaw portion) protruding outward from the side portion 13, and this portion forms the base portion 31. Therefore, in the following description, the base portion 31 will be described as being included in the bottom portion 14 of the duct 12.

The outer edge of the bottom 14 of the duct 12 (the outer edge of the base 31) is provided with a rising portion 32 that rises upward. The illuminating tool 30 is arranged upward in the space between the rising portion 32 and the side portion 13 of the duct 12. As shown in FIG. 6, the illuminating tool 30 may be arranged so as to be slightly inclined toward the outside in order to widen the irradiation range of light (to the ceiling). Further, a light reflecting film or a light diffusing film may be provided on the outer surface of the side portion 13 of the duct 12.

The illuminator 30 is arranged in a line along the longitudinal direction of the duct 12. For example, as shown in FIG. 7, elongated illuminators 30 are arranged in rows along the longitudinal direction of the duct 12. As a result, it is possible to irradiate substantially uniform light (from one end in the longitudinal direction to the other end) from both sides of the duct 12. Specifically, as shown in FIG. 9B, among the ceiling surfaces exposed to the room R, the ceiling surface adjacent to the duct 12 (the portion surrounded by the alternate long and short dash line in FIG. 9B). It can irradiate light evenly. As a result, the ceiling surface of the room R becomes bright, so that the illuminance of the room R can be ensured without directly attaching the lighting fixture to the ceiling surface.

Here, since the illuminating tool 30 is arranged on the bottom portion 14 of the duct 12, the irradiation light of the illuminating tool 30 does not hit the bottom surface of the duct 12. Therefore, the brightness of the bottom surface of the duct 12 is relatively lower than the ceiling surface (the portion where the duct 12 is not arranged) exposed in the indoor space of the room R.

In the present embodiment, the width dimension of the bottom portion 14 of the duct 12 extending from the vicinity of the first wall portion W1 to the vicinity of the second wall portion W2 is 1000 mm or more, and the area of the bottom surface of the duct 12 is relatively large. Further, as shown in FIGS. 2 and 5, the duct 12 is also arranged in the central portion (position separated inward from the outer peripheral portion) of the room R in a plan view. Therefore, if the bottom surface of the duct 12 is dark, the resident working under the duct 12 may feel dissatisfied. Residents may also feel oppressive.

Therefore, the indirect lighting structure 1 according to the present embodiment includes a light guide member 40 arranged so as to penetrate the base portion 31 on which the lighting tool 30 is placed. The light guide member 40 is a member that guides a part of the light of the illuminating tool 30 downward beyond the base portion 31, and is made of, for example, a transparent acrylic resin.

A through hole 33 is provided in the region of the base portion 31 between the side portion 13 of the duct 12 and the illuminator 30, and the light guide member 40 extending in the vertical direction is provided in the through hole 33. It has been inserted. The upper end of the light guide member 40 is fixed to the ceiling CR. As a result, the lower end surface of the light guide member 40 emits light by the light captured (accepted) by the light guide member 40, so that the brightness of the bottom surface of the duct 12 is increased without separately providing a lighting fixture on the bottom surface of the duct 12. Can be made to.

In the present embodiment, the plurality of light guide members 40 are arranged at intervals along the longitudinal direction of the duct 12. Each light guide member 40 is typically composed of a rod-shaped member extending in the vertical direction. Specifically, each light guide member 40 is composed of, for example, a transparent acrylic rod having a prism whose side is 10 mm or less. By adopting such an acrylic rod having a relatively small cross section as the light guide member 40, the size of the through hole 33 at the bottom 14 of the duct 12 can be reduced.

The material of the light guide member 40 is not limited to acrylic resin, and may be, for example, optical fiber, glass, or the like.

As shown in FIGS. 6 and 7, an opaque reflective material 42 formed in a film shape (sheet shape) is provided on the outer peripheral surface of the portion of the light guide member 40 that penetrates the base portion 31. It is desirable to be there. As a result, it is possible to suppress the escape of the light captured by the light guide member 40 and effectively guide the light captured by the light guide member 40 to the lower end surface. The opaque reflective material 42 is formed of, for example, aluminum foil.

The opaque reflective material 42 is arranged so as to cover a portion of the total length of the light guide member 40 located below the illuminating tool 30. The opaque reflective material 42 may be wound around the light guide member 40, or may be attached to a portion through which the light guide member 40 is inserted.

In order to more effectively guide the light captured by the light guide member 40 to the lower end surface, the side portion 13 of the duct 12 is included in the portion that does not penetrate the base portion 31 (the portion on the upper end side of the light guide member 40). An opaque reflective material may also be provided on the facing portion (arc surface). That is, the opaque reflective material 42 may be provided in all the regions of the cylindrical surface constituting the outer peripheral surface of the light guide member 40 other than the portion that receives the light of the illuminating tool 30.

In the present embodiment, the light diffusing member 41 is connected to the lower end of the light guide member 40. The light diffusing member 41 is a member for diffusing the light guided below the base portion 31 via the light guide member 40 to the surroundings.

The light diffusing member 41 is formed in a plate shape, and has an upper surface that comes into surface contact with the lower end surface of the light guide member 40 and a lower surface that is exposed in the interior space of the room R and has light diffusing properties. As a result, the light guided to the lower end surface of the light guide member 40 can be diffused downward.

The details of the light diffusing member 41 will be described with reference to FIG. The light diffusion member 41 is composed of, for example, a light guide plate 41a connected to the lower end surface of the light guide member 40 and a light diffusion film 41b provided on the lower surface of the light guide plate 41a. The light diffusion film 41b is attached so as to cover the lower surface of the light guide plate 41a. Instead of the light diffusion film 41b, the lower surface of the light guide plate 41a may be blasted. That is, the light guide plate may have a lower surface that has been subjected to a light diffusion treatment such as blasting.

The area of the light guide plate 41a of the light diffusing member 41 is larger than the area of the lower end surface (cross section) of the light guide member 40. Therefore, as shown in FIG. 7, the light diffusing member 41 is arranged along the lower surface of the base portion 31 (the bottom surface of the duct 12). As a result, even when an acrylic rod having a relatively small cross section is used as the light guide member 40, the area of the portion that emits light under the bottom surface of the duct 12 can be increased.

In the present embodiment, the light diffusing member 41 has a length in the direction along the longitudinal direction (X direction) of the duct 12. In this case, the length of the light diffusing member 41 in the X direction is longer than the length of each side of the light guide member 40, and is preferably three times or more the length of each side of the light guide member 40.

As shown in FIG. 8, it is desirable that the opaque reflective material 43 is also arranged on the upper surface of the light guide plate 41a of the light diffusing member 41. The opaque reflective material 43 is arranged only between the bottom surface of the duct 12 and the light guide plate 41a.

The opaque reflective material 43 may also be made of the same material as the opaque reflective material 42 wound around the light guide member 40. Of the opaque reflective materials 42 and 43, the color of the opaque reflective material 43 that comes into contact with at least the bottom surface of the duct 12 is a color with little tint such as white. As a result, even if the color of the bottom 14 of the duct 12 is, for example, a dark wood color, it is possible to prevent the light emitting color of the light guide plate 41a from becoming dark due to the influence of the color.

According to the indirect lighting structure 1, a part of the light of the illuminating tool 30 is guided downward by the light guide member 40 beyond the bottom portion 14 (base portion 31) of the duct 12, and the light is diffused by the light diffusing member 41. Will be done. As a result, as shown in FIG. 9A, not only the ceiling surface adjacent to the duct 12 but also the light diffusing member 41 and its peripheral portion (the portion surrounded by the alternate long and short dash line in FIG. 9A) become bright. ..

Therefore, according to the present embodiment, it is possible to reduce the darkness of the bottom surface of the duct 12 while saving energy. Further, since the bottom surface of the duct 12 dimly shines, the resident working under the duct 12 does not feel dazzling. In addition, the design of the bottom surface of the duct 12 can be improved.

(Modification example)
In the present embodiment, the plurality of light diffusing members 41 are arranged at equal intervals along the X direction, but the plurality of light diffusing members 41 are arranged in a row (without gaps) along the X direction. You may. As a result, the light guide plate 41a connected to the light guide member 40 is connected to the adjacent light guide plate 41a, so that the illumination range on the bottom surface of the duct 12 can be expanded.

In the present embodiment, the light diffusing member 41 is a long member having a length in the X direction, but the present invention is not limited. That is, the planar shape of the light diffusing member 41 is not particularly limited. For example, the light diffusing member 44 shown in FIG. 10 may have a circular (perfect circle or ellipse) shape. The light diffusing member 44 has a circular light guide plate 44a and a light diffusing film 44b provided on the lower surface of the light guide plate 44a. In FIG. 10, instead of the prismatic light guide member 40, the columnar light guide member 40A is connected to the light diffusion member 44.

In the present embodiment, the member connected to the lower end of the light guide member 40 is a light diffusing member 41 having light diffusivity, but the present invention is not limited. For example, a light guide plate 41a having a larger area than the light guide member 40 may be connected to the lower end of the light guide member 40 by itself. That is, the member connected to the lower end of the light guide member 40 may have no or almost no light diffusivity.

In the present embodiment, the light guide member 40 is a rod-shaped member extending in the vertical direction, but is not limited. The light guide member may be, for example, a plate-shaped member (light guide plate) arranged along the X direction. In such a case, since the cross-sectional area of the light guide member is larger than that of the rod-shaped light guide member 40, the light guide plate 41a having a larger area than the cross section of the light guide member can be unnecessary.

In this case, the light diffusion film may be directly attached to the lower end surface of the light guide member, or the lower end surface of the light guide member may be blasted. That is, a light diffusing member may be provided on the lower end surface of the light guide member penetrating the base portion 31.

In the present embodiment, an example is shown in which the indirect lighting structure 1 is applied to the duct type air conditioning system and is included in the duct air conditioning / lighting integrated system 100, but the present invention is not limited. That is, the base portion 31, which is arranged at a space below the ceiling surface of the room R and on which the illuminator 30 is placed, does not have to be continuous with the bottom portion 14 of the duct 12.

Specifically, the indirect lighting structure 1 according to the present embodiment can be applied to a stepped portion of the ceiling of a room having a falling ceiling or a rising ceiling. More specifically, for example, in the case of an indirect lighting structure using a falling ceiling, the edge portion of the falling ceiling on which the illuminating tool 30 is placed constitutes the base portion 31. In such a case, the light guide member 40 is provided so as to penetrate the edge of the descending ceiling on which the luminaire 30 is placed, so that the bottom surface of the descending ceiling one step lower than the ceiling surface to be irradiated by the illuminator 30. The brightness of the can be increased.

Therefore, even if the area of the descending ceiling is relatively large, or even if the descending ceiling is arranged away from the outer periphery of the room, the brightness of the bottom surface of the descending ceiling is insufficient. It is possible to reduce the dissatisfaction of the person.

The indirect lighting structure 1 according to the present embodiment can also be applied to a room in a building other than an office, such as a living room in a house.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Indirect lighting structure, 10 air conditioner, 11 air conditioner, 12 duct, 13 side, 14 bottom, 15 opening, 30 luminaire, 31 base, 32 rise, 33 through hole, 40, 40A light guide member, 41 , 44 light diffusing member, 41a, 44a light guide plate, 41b, 44b light diffusing film, 42, 43 opaque reflective material, 100 duct air conditioning / lighting integrated system, R room.

Claims (9)

A base portion that is arranged at a space below the ceiling surface of the room and is provided so as to be continuous with the bottom surface portion at a position lower than the ceiling surface .
A luminaire that is fixed on the base and radiates light toward the ceiling surface.
The upper end portion is fixed to the ceiling surface, and the base portion is arranged so as to penetrate the area of the base portion on the bottom surface portion side of the illuminating tool, and a part of the light of the illuminating tool passes over the base portion. Indirect lighting structure with a light guide member that guides downward. The indirect lighting structure according to claim 1, further comprising a light diffusing member that diffuses light guided below the base portion through the light guide member to the surroundings. The indirect lighting structure according to claim 2, wherein the light diffusing member is composed of a light guide plate connected to the lower end of the light guide member and a light diffusing film provided on the lower surface of the light guide plate. The light diffusing member includes a light guide plate connected to the lower end of the light guide member.
The indirect lighting structure according to claim 2, wherein the light guide plate has a lower surface that has been subjected to a light diffusion treatment. The indirect lighting structure according to claim 1, further comprising a light guide plate which is arranged along the lower surface of the base portion while being connected to the lower end of the light guide member and has a larger area than the cross-sectional area of the light guide member. .. The indirect lighting structure according to claim 5, wherein an opaque reflective material is arranged between the lower surface of the base portion and the light guide plate. The indirect lighting structure according to any one of claims 1 to 5, wherein the outer peripheral surface of the portion of the light guide member that penetrates the base portion is covered with an impermeable reflective material. The indirect lighting structure according to any one of claims 1 to 7, wherein the light guide member is made of a transparent acrylic resin. The ceiling of the room has a bottom portion and a side portion as the bottom surface portion, and a duct for guiding air is arranged.
The indirect lighting structure according to any one of claims 1 to 8, wherein the base portion is arranged so as to project laterally from the side portion so as to be continuous with the bottom portion of the duct.

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