JP2021026943A - Sunlight incidence structure - Google Patents

Abstract

To set internal arrival light of incident sunlight in other seasons than winter, especially in summer to a pseudo-winter state, and to reduce variation of the internal arrival light over a year.SOLUTION: In a sunlight incidence structure which has a plurality of light incidence adjustment members 2 with mirror surface specifications arranged at a light collection part 1 in such a configuration that they position in the east and west directions respectively and in the north to south direction as a whole in plan view, each of the light incidence adjustment members 2 is arranged at an angle θ1 inclined upward to the south, and an east/west-directional opening part 6 is arranged as a light incidence optical path between an upper surface thereof and a lower surface of a north-adjacent light incidence adjustment member. The angle θ1 of inclination is so set that part D3 of incident sunlight in summer is reflected to above the light incidence adjustment members and does not impinge thereupon to cause a decrease in illuminance accompanying mirror reflection of the incident sunlight in summer on the upper surface and the lower surface and also to prevent mirror reflection of incident sunlight in winter from occurring.SELECTED DRAWING: Figure 1

Description

In the present invention, by providing a plurality of specular plate-shaped light incident adjusting members in a parallel state with the light incident side "south rising", it depends on the season of the internal light (brightness) reaching the internal space area such as indoors. It relates to a sunlight incident structure in which the amount of change is minimized.

The specifications and drawings of the present application are premised on the incident sunlight at the time of south-central time in Tokyo, if necessary, for convenience of explanation.

In the case of the present invention, the brightness of the internally reaching light in summer and spring / autumn (particularly in summer) is reduced by the reflection action of the light incident adjusting member to bring it closer to that in winter.
That is, based on the brightness based on the low elevation angle of winter sunlight, the internal light reaching the inside of each season other than winter is reduced to a pseudo-winter state of a smaller level than it should be, thereby reducing the inside of the irradiation target throughout the year. The fluctuation of the brightness of the space area is reduced as much as possible.

In order to set the internally reaching light other than winter to the pseudo-winter state corresponding to this small level, in the present invention, the mirror plate-shaped light incident adjusting member is provided as described later (see FIG. 1).
(11) A part of the summer incident sunlight with a high elevation angle is specularly reflected on the upper end side of the light incident adjusting member and escapes to the upper space area of the lighting part.
(12) Utilizing the light reflection property that the incident sunlight is weakened by specular reflection by the light incident adjusting member, the inclination angle (with respect to the horizontal plane) of the light incident adjusting member is made substantially the same as the elevation angle of the incident sunlight in winter. Reduces the occurrence of specular reflection in winter and suppresses the degree of reflection weakening of sunlight incident in winter,
It is arranged in such a manner.

Due to the tilt angle setting of the light incident adjusting member in (12), the specular reflection is extremely weak in the incident sunlight in winter, and the degree of weakening of the incident sunlight due to this weak reflection is also small.

On the other hand, in spring / autumn and summer when the elevation angle of sunlight is larger than in winter, the specular reflection of incident sunlight in the light incident adjusting member is relatively strong, and the degree of weakening of incident sunlight due to this strong reflection is greater than in winter. large.

That is, the incident sunlight in spring / autumn and summer is not the incident light itself to the lighting unit, but the weak incident light due to specular reflection by the light incident adjusting member. In the case of summer, the incident sunlight escape effect on the upper space area is added to this weakly incident light action.

Due to the weakening action of these incident sunlight due to specular reflection by the light incident adjusting member in spring / autumn and summer, and the escape action to the upper space area on the upper end side of the light incident adjusting member in summer, it reaches the inside other than winter. The light is set to the pseudo-winter state equivalent to the above small level.

In the present invention, the brightness inside the irradiation target is set throughout the year by setting the incident sunlight in spring / autumn and summer to the pseudo-winter state by the light incident adjusting member arranged "south rising" on the light incident side. Is set to approximately the winter level, and fluctuations in the amount of light received indoors from season to season are reduced.

The Applicant has already proposed a sunlight incident structure that reduces the time zone fluctuations of low-elevation sunlight and high-elevation sunlight (indoor illuminance, etc.) in the morning, noon, and evening of the day. (See Patent Document 1 below).

Here, a plurality of mirror-finished light incident adjusting members having the same shape, for example, rectangular flat plates, are placed at the east and west sites of the lighting section in the north-south direction, respectively, and as a whole, the closer to the site boundary, the higher the east-west direction. It is arranged in the position of.

That is, the light incident adjusting member at the east site is arranged in an east rising inclined mode, and the light incident adjusting member at the west site is arranged in a west rising inclined mode.

Due to the arrangement of the light incident adjusting members at each of the east and west sites, the direct sunlight of sunrise and sunset is efficiently taken into the inside of the irradiation target from the daylighting section.

Japanese Patent No. 6184429

The proposed sunlight incident structure is based on the inclination mode of a plurality of light incident adjusting members arranged at each east and west site, and low elevation angle morning and evening sunlight is emitted between adjacent light incident adjusting members. It is incorporated into the indoor entrance opening area.

With the active entry of the morning and evening sunlight into the room, the brightness of the space area approaches that of the daytime sunlight with a high elevation angle, so to speak, indoors during the daytime hours (morning, noon, evening) of the day. It has the convenience of being able to reduce fluctuations in brightness.

The present invention is based on the idea of a conventional sunlight incident structure, which has the advantage of reducing fluctuations in indoor brightness for one day, and is based on the idea of internal light (indoor brightness) that reaches the interior throughout the year in winter, spring, summer, and autumn. ) By analogy, the light reaching the inside is averaged on a yearly basis.

In applying this analogy,
(21) Let some of the summer incident sunlight escape above the light incident adjustment member,
(22) Utilizing the fact that the incident sunlight is weakened by the specular reflection of the light incident adjusting member, the inclination angle of the light incident adjusting member is set to be substantially the same as the elevation angle of 32 degrees of the winter incident sunlight, and the degree of occurrence of the winter specular reflection. Suppress,
The main point is that.

According to the present invention, the internally reaching light other than winter (particularly summer) is in a pseudo-winter state due to the escape action of these incident sunlight to the upper space area on the upper end side of the light incident adjustment member in summer and the weakening action due to specular reflection. The purpose is to reduce fluctuations in the internal light reaching the entire year.

Here, the specular reflection action of multiple light incident adjustment members in the daylighting section positively reduces the brightness of the internally reaching light in each of spring, summer, and autumn (especially in summer), and approaches the minimum winter state. (See FIG. 3).

The present invention solves the above problems as follows.
(1) A plurality of mirror-finished light incident adjusting members (for example, a light incident adjusting member 2, a first bending light incident adjusting member 4, and a second bending light incident adjusting member 5) described later are arranged in the east-west direction. In addition, in the sunlight incident structure arranged in the light collecting unit (for example, the light collecting unit 1 described later) in the position mode in the north-south direction in the plan view as a whole.
The light incident adjusting member is
They are arranged in a southward inclination mode (for example, inclination angles θ1, θ3, θ5 to θ8, θ17, which will be described later).
An east-west direction opening (for example, an east-west direction opening 6 described later) as an optical path for light incidence is set between the upper surface and the lower surface of the light incident adjusting member adjacent to the north.
The southward slope mode is
A part of the incident sunlight in summer is reflected above the light incident adjustment member and escaped.
It causes a decrease in illuminance due to specular reflection on the upper surface and the lower surface with respect to incident sunlight in summer, and suppresses the occurrence of specular reflection with respect to incident sunlight in winter.
Set to a tilt angle with at least functionality,
The configuration mode is used.
(2) In (1) above
The overall inclination mode of the light incident adjusting member (for example, the second bending light incident adjusting member 5 described later) that rises southward is different.
The light incident adjusting member arranged on the north side is in an inclined state closer to the horizontal plane of the lighting portion.
The configuration mode is used.

The present invention is intended for a sunlight incident structure using a light incident adjusting member having the above configuration.

According to the above-mentioned problem-solving means, the amount of incident sunlight reaching the inside of the irradiation target in each season of spring, summer, and autumn is positively reduced from the original irradiation amount, and indoors with the incident sunlight in winter. It is possible to approach the irradiation state and reduce the change in internal illuminance throughout the year.

It is explanatory drawing which shows the cross-sectional state in the north-south vertical direction of the sunlight incident structure in which a plurality of rectangular flat plate-shaped light incident adjusting members are arranged in the south rising mode. It is explanatory drawing which shows the light incident adjustment member unit which arranged the plurality of light incident adjustment members of FIG. 1 inside the frame body in the parallel mode which went up south. It is explanatory drawing which shows the change of the luminous flux amount for one year in the indoor space area with the installation of the sunlight incident structure of FIG. 1, that is, the illuminance change of the incident sunlight which reaches the indoor space area. This is a modification of the light incident adjusting member shown in FIG. 1, and is a plurality of bent light incidents in which the lower portion and the upper portion of each are subjected to relative bending processing and the whole is arranged in a parallel manner in the north-south direction. It is explanatory drawing which shows the adjustment member, and about the said parallel aspect with respect to the horizontal plane of daylighting part in the north-south direction of the drawing, a plurality of bending light incident adjustment members (a) are set to the same inclination state, and (b) is It is explanatory drawing which shows that the adjustment member arranged on the north side was set to the downward spread and the small inclination state (the inclination state which approaches the horizontal plane of a lighting part).

An embodiment of the present invention will be described with reference to FIGS. 1 to 4.

In FIGS. 1 to 4,
1 is a daylighting unit that is set on the roof of a building and exhibits a sunlight incident effect.
A plurality of 2 are arranged in parallel mode with the same pitch in the north-south direction, respectively, in the daylighting section 1, and are composed of a mirror-finished surface specification and a rectangular plate shape without bending (see FIGS. 1 and 2).
Reference numeral 3 denotes a light incident adjusting unit (see FIG. 2) in which a plurality of, for example, 13 light incident adjusting members 2 are arranged as unit elements for "south rising" construction.
3a is a rectangular frame body that fixedly holds each of the light incident adjusting members 2 arranged inside the light incident adjusting unit 3.
Reference numeral 4 denotes a modified example of the light incident adjusting member 2, which is a mirror-finished first bending light incident adjusting member (FIG. 4) which has been subjected to bending (No. 1) in order to enhance its own light guide property and secure strength. (A)),
4a is the lower part of the first bending light incident adjusting member 4.
4b is an upper portion continuous above the lower portion 4a,
Reference numeral 5 denotes a modified example of the light incident adjusting member 2, which is a second bending light incident adjusting member having a mirror surface specification (FIG. 4), which has been bent (No. 2) in order to enhance its own light guide property and secure the strength. (B)),
5a is the lower part of the second bending light incident adjusting member 5.
5b is an upper portion continuous above the lower portion 5a,
5c is the upper end portion continuous above the upper portion 5b,
51 is a southern end arrangement adjusting member as the second bending light incident adjusting member 5 on the left end side in FIG. 4 (b).
52 is a north end arrangement adjusting member as the second bending light incident adjusting member 5 on the right end side of FIG. 4 (b).
6 is set between the upper surface of the light incident adjusting member 2, the first bending light incident adjusting member 4 and the second bending light incident adjusting member 5, and the lower surface of the light incident adjusting member to the north of the upper surface. East-West opening for sunlight incident,
Are shown respectively.

Also,
A, B1, C1 and D1 are incident sunlight traveling straight into the indoor space (see Fig. 1),
B2, C2, and D2 are incident sunlight that travels to the indoor space area based on the reflection action of the light incident adjustment member 2.
D3 is the incident sunlight that escapes into the sky based on the reflection action on the upper surface of the light incident adjustment member 2.
R is the amount of reduction in the amount of indoor lighting (luminous flux) when the sunlight incident structure of the present invention is used (see FIG. 3).

Also,
W is the so-called surface width of the light incident adjusting member 2 in the north-south direction.
L is the length of the light incident adjusting member 2 and the first and second bending light incident adjusting members 4 and 5 in the east-west direction.
P is the arrangement pitch of the light incident adjusting member 2 in the north-south direction.
W1 is the north-south plane width (W11 + W12) of the first bending light incident adjusting member 4.
W11 is the north-south surface width of the lower part 4a,
W12 is the north-south surface width of the upper part 4b,
P1 is the arrangement pitch W2 of the first bending light incident adjusting member 4 in the north-south direction, and the surface width of the second bending light incident adjusting member 5 in the north-sout direction (W21 + W22 + W23).
W21 is the north-south surface width of the lower part 5a,
W22 is the north-south surface width of the upper part 5b,
W23 is the north-south surface width of the upper end 5c,
P2 indicates the arrangement pitch of the second bending light incident adjusting member 5 in the north-south direction.

Also,
θ1 is the arrangement inclination angle of the light incident adjusting member 2.
θ2 is the bending angle between the lower portion 4a and the upper portion 4b of the first bending light incident adjusting member 4.
θ3 is the arrangement tilt angle of the first bending light incident adjusting member 4 (the same tilt angle of the upper portion 4b with respect to the horizontal plane of the lighting portion 1).
θ4 is the bending angle between the lower portion 5a and the upper portion 5b of the second bending light incident adjusting member 5.
θ5 to θ8 and θ17 are the arrangement inclination angles of the second bending light incident adjusting member 5 (the change inclination angle of the lower portion 5a with respect to the horizontal plane of the daylighting portion 1: the smaller the inclination is the one arranged on the north side).
Are shown respectively.

Numerical examples of each element of each of the light incident adjusting member 2, the first bending light incident adjusting member 4 and the second bending light incident adjusting member 5 are as follows.
W: 50mm
L: 600mm
P: 40mm
W1: 88.2mm
W11: 49.1mm
W12: 49.1mm
P1: 60mm
W2: 98.3mm
W21: 32.1mm
W22: 59mm
W23: 7.2mm
P2: 40mm

The following angles are displayed at acute angles.
θ1: 30 degrees θ2, θ4: 150 degrees θ3: 47 degrees θ5: 75 degrees θ6: 73 degrees θ7: 71 degrees θ8: 69 degrees θ17: 51 degrees

As shown in FIG. 4B, a total of 13 second bending light incident adjusting members 5 have the adjusting members arranged on the north side expanding downward and having a small inclination (inclination approaching the horizontal plane of the lighting unit 1). The state) is set.

That is, from the south end arrangement adjusting member 51 (arrangement inclination angle θ5: 75 degrees) on the left side of FIG. 4 (b) to the north end arrangement adjustment member 52 (arrangement inclination angle θ17: 51 degrees) on the right side of the drawing, a total of 13 The second bending light incident adjusting member 5 is arranged so as to cause an inclination change of "2 degrees" in order. It should be noted that the display of the arrangement inclination angle of each of the eight second bending light incident adjusting members 5 arranged between the arrangement inclination angle θ8 and the arrangement inclination angle θ17 is omitted.

As shown in FIG. 4B, by setting the second bending light incident adjusting member 5 in a sequential inclination changing mode such as spreading downward and low inclination on the north side, there are advantages such as diffusion of incident light into the indoor space area. There is.

Here, the mirror surface specifications of the light incident adjusting member 2 without bending and the first and second bending light incident adjusting members 4 and 5 are, for example, an aluminum mirror surface, a stainless mirror surface, and a silver / aluminum vacuum metal. Use a resin mirror surface or glass mirror surface that has been treated with a vapor-deposited film.

The frame 3a is made of a metal such as aluminum or stainless steel, or a plastic made of acrylic or polycarbonate. In order to fix the incident adjusting member 2 and the first and second bending light incident adjusting members 4 and 5 to the lighting unit 1, various fixing means such as screwing, riveting, and adhesion are appropriately used.

As shown in FIGS. 1 and 2, the light incident adjusting member 2 without bending is composed of, for example, a plurality of rectangular flat plates having the same shape with mirror surface specifications, and each of them is inclined in the southward upward direction on the light incident side in the east-west longitudinal direction. Moreover, as a whole, they are arranged in parallel in the north-south direction in a plan view.

In this way, next to each of the light incident adjusting members 2, 4 and 5 of FIGS. 1 to 4 arranged in parallel in the north-south direction in a south-up mode, the upper surface of each south side member and the lower surface of each north side member The east-west direction opening 6 for incident sunlight is set so as to be separated from each other.

The solar incident structure consisting of the light incident adjusting members 2, 4 and 5 rising south in the figure is
(31) The east-west direction opening 6 allows the incident sunlight to travel straight into the indoor space area (see incident sunlight A, B1, C1, D1 in FIG. 1).
(32) The incident sunlight is guided to the indoor space area based on the reflection action on the upper surface of the light incident adjustment member and the subsequent rereflection on the lower surface (incident sunlight B2, C2 in FIG. 1). See D2),
(33) A part of the summer incident sunlight is released to the sky based on the reflection action on the upper surface of the light incident adjusting member (see the incident sunlight D3 in FIG. 1).
The course of incident sunlight is adjusted in such a manner.

Such a course adjusting operation of the light incident adjusting member 2 also occurs when the first bending light incident adjusting member 4 and the second bending light incident adjusting member 5 are used.

In the summer with a high elevation angle, the incident sunlight toward the east-west opening 6 is initially reflected by the upper incident light (incident sunlight D3) on the upper surface of the light incident adjusting member, and then the adjacent light incident adjusting member. It escapes to the upper outdoor space without rereflection on the underside of the light.

In the incident sunlight with a low elevation angle such as in winter, there is no escape to this upper space area (outdoor), and compared to the incident sunlight with a high elevation angle in summer, the incident sunlight taken in from the east-west direction opening 6 indoors. The proportion of light increases.

In addition, as the sun elevation angle increases from winter to summer, rereflection occurs on the lower surface of the adjacent light incident adjusting member.

The incident sunlight indoors becomes weaker according to this rereflection (number of times). As a result, the brightness of indoor incident sunlight in spring and autumn, when the initial reflected light does not escape to the upper outdoor space area as in summer, can be suppressed to be close to that in winter.

FIG. 3 is a simulation result showing that the brightness of indoor incident sunlight in each of spring, summer and autumn can be suppressed by the action of such a sunlight incident structure of the present invention.

In this simulation, the sunlight incident structures of FIGS. 1 and 2 composed of the south-upward light incident adjusting member 2 are used indoors for "when used" and "when not used", such as during south-central time in Tokyo. The amount (luminous flux amount) is calculated.

The amount of indoor lighting after the reduction of "when used" is shown by a dotted line, and the original amount of indoor lighting when "not used" is shown by a solid line. The difference between the dotted line and the solid line is the reduction R of the amount of indoor lighting due to the use of the sunlight incident structure of the present invention.

For example, the amount of indoor lighting at 12:00 on April 22 has been reduced by about 10,000 lumens due to the action of this sunlight incident structure.

The simulation results of FIG. 3 show that the brightness (indoor lighting amount) when the light incident adjusting member 2 is "used" is roughly as compared with the so-called normal lighting when the light incident adjusting member 2 is not used.
(41) It decreased in February-October, and decreased significantly in May-July.
(42) In the winter seasons of January, November and December, it is almost the same as "when not in use", and the brightness of each month is also almost the same.
(43) Brightness after reduction approaches the amount of indoor lighting in winter except in winter from February to October.
It shows that.

The main point of the present invention is to bring the indoor lighting amount after the brightness reducing action of February to October including the summer of the above (43) close to the indoor lighting amount in winter.

It goes without saying that the present invention is not limited to the above embodiments, for example.
(51) Attach various types of optical ducts to the lighting unit 1,
(52) Similar to the bending light incident adjusting member 5, the light incident adjusting member 2 and the bending light incident adjusting member 4 have a smaller inclination (inclined state closer to the horizontal plane of the lighting portion) toward the north side adjusting member. Set with,
(53) Light Incident Adjusting Member 2 and Bending Processing Fins of various shapes (flat plate fins and curved plate fins) are used as the light incident adjusting members 4 and 5.
(54) Light Incident Adjusting Member 2 and Bending Process As the light incident adjusting member 4 and 5, members having an inclination and bending mode (not shown) are used.
You may do so.

1: Daylighting section
2: Light incident adjustment member without bending (see FIGS. 1 and 2)
3: Light incident adjustment unit (see Fig. 2)
3a: Frame 4: First bending light incident adjusting member (see FIG. 4A)
4a: Lower part 4b: Upper part 5: Second bending light incident adjusting member (see FIG. 4B)
5a: Lower part 5b: Upper part 5c: Upper end part 51: South end arrangement adjusting member 52: North end arrangement adjusting member 6: East-west direction opening for sunlight incident

A, B1, C1, D1: Incident sunlight traveling straight into the indoor space (see Fig. 1)
B2, C2, D2: Incident sunlight that advances to the indoor space area based on reflection action D3: Incident sunlight that escapes to the sky based on reflection action R: Reduction of indoor lighting amount (luminous flux amount) (see Fig. 3)

W: Surface width in the north-south direction of the light incident adjusting member L: Length in the east-west direction of the light incident adjusting member, etc. P: Arrangement pitch in the north-south direction of the light incident adjusting member W1: First bending process North-south surface width (W11 + W12)
W11: North-south surface width of the lower part W12: North-south surface width P1 of the upper part is the arrangement pitch W2 in the north-south direction of the first bending light incident adjusting member: North-south surface width (W21 + W22 + W23)
W21: North-south surface width of the lower part W22: North-south surface width of the upper part W23: North-south surface width P2 of the upper end part is the arrangement pitch of the second bending light incident adjusting member in the north-south direction.

θ1: Arrangement inclination angle of the light incident adjusting member θ2: Bending angle of the first bending light incident adjusting member θ3: Arrangement inclination angle of the upper part of each of the first bending processing light incident adjusting members (same inclination)
θ4: Bending angle of the second bending light incident adjusting member θ5 to θ8, θ17: Arrangement inclination angle of the lower part of each of the second bending light incident adjusting members (smaller inclination as the one arranged on the north side)

Claims (2)

In a solar incident structure in which a plurality of mirror-finished light incident adjusting members are arranged in a daylighting portion in an east-west direction and as a whole in a plan view north-south direction.
The light incident adjusting member is
Each is arranged in a south-upward slope,
An east-west opening as an optical path for light incident is set between the upper surface and the lower surface of the light incident adjusting member adjacent to the north.
The southward slope mode is
A part of the incident sunlight in summer is reflected above the light incident adjustment member and escaped.
It causes a decrease in illuminance due to specular reflection on the upper surface and the lower surface with respect to incident sunlight in summer, and suppresses the occurrence of specular reflection with respect to incident sunlight in winter.
Set to a tilt angle with at least functionality,
A solar incident structure characterized by that. The overall inclination mode of the light incident adjusting member rising south is
The light incident adjusting member arranged on the north side is in an inclined state closer to the horizontal plane of the lighting portion.
The solar incident structure according to claim 1.

Images