JPH0637381Y2 - Daylighting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Prior Art] The present invention relates to a daylighting device for drawing sunlight as indoor illumination light.

BACKGROUND ART Conventionally, as a daylighting device of this type for collecting sunlight as indoor illumination light, there has been a device using an optical fiber in a light guide path or a device using a daylighting duct. However,
In the conventional example using an optical fiber, although the attenuation is small and the light collection efficiency is good, the fiber diameter is small, so it is not possible to increase the amount of light collection. There was a problem that it would be very expensive. In addition, in the conventional example using the lighting duct, although the cost is low, the lighting efficiency is poor, so the duct diameter must be increased to increase the lighting amount, and the lighting for penetrating the slab or beam is used. There is an inconvenience that the opening becomes large and structural problems of the building occur. In addition, as still another conventional example, as shown in FIG. 16, a tracking reflecting mirror 1 that tracks the sun and reflects sunlight directly below, and two parabolic mirrors (concave mirror, convex mirror) 40, 41. In some cases, the reflected light from the tracking reflecting mirror 1 is collected by using the and, and the light collection opening 4 is made small. However, in such a conventional example, since the parabolic mirrors 40 and 41 are used, light deviated from the optical axis (for example, parabolic mirrors 40 and 41 without the tracking reflecting mirror 1). Sunlight and skylight directly incident on
In addition to being unable to collect light, there is also a problem in that the light is blocked by the frame 42 and the parabolic mirror 41, so that the overall light collection efficiency deteriorates.

In view of the above problems, the present inventors have proposed a daylighting device as shown in FIGS. 1 to 7.

The lighting device shown in FIGS. 1 to 7 includes a tracking reflecting mirror 1 that tracks the sun and reflects the direct sun light in a fixed direction, and a Fresnel lens that converges the reflected light reflected by the tracking reflecting mirror 1. Large diameter converging lens 2 and the converging lens 2
And a small-diameter diffusing lens 3 made of a Fresnel lens for converting the converged light converged in (1) into substantially parallel light. In this conventional example, the tracking reflecting mirror 1 formed of a circular plane mirror is used.
Is attached to the frame 10 via a hanging arm 11 that is hung from the upper end of the frame 10 that forms a dome, and a rotating arm 13 that is horizontally rotatably attached to the hanging arm 11. The pulse motor 12 for azimuth axis drive incorporated in the hanging arm 11 and the pulse motor 15 for altitude axis drive incorporated in the rotating arm 13, the azimuth data of the sun at each time,
The angle (azimuth angle and altitude angle) of the tracking reflecting mirror 1 is controlled by computer control (described later) based on the altitude data, and the sun is tracked so that sunlight is always reflected right below. Further, the azimuth axis limit switch 14 and the altitude axis limit switch 16 are switches for setting the upper and lower limits of the rotation range, and the position sensor for detecting the azimuth angle and the altitude angle of the tracking reflector 1 are the drive motors 12, 1
It is provided on the output shaft side of the five speed reducers 12a and 15a. Also,
A translucent lighting dome 20 is attached to the dome portion of the frame 10, and a dustproof cover 20a is attached to the cylindrical portion.

FIG. 4 shows an example of the arrangement of the converging lens 2 and the diffusing lens 3. The converging lens 2 is arranged so that the upper surface is a prism surface, and the diffusing lens 3 is arranged so that the lower surface is a prism surface. The structure of the mounting portion of the converging lens 2 attached to the auxiliary frame 17 is as shown in FIG. That is, the converging lens 2 is
It is fixed to the frame 17 by a fixing screw 19 which is inserted into the long hole 18a of the L-shaped metal fitting 18 which is screwed to the peripheral edge of the converging lens. The lens interval between 2 and the diffusion lens 3 is adjustable. Here, the converging lens 2 and the diffusing lens 3
By making the magnification of the same and setting the lens interval of both lenses 2 and 3 appropriately, it becomes possible to freely change the light passing through the lighting aperture 4 into parallel light, diffused light and convergent light. ing.

FIG. 6 shows an example of construction in which the light concentrating device A is arranged on the rooftop slab S, and a mounting base portion 21 protruding from the rooftop slab S is provided.
A lighting opening 4 is formed in the center of the
An anchor bolt 22 for mounting the device is embedded in the peripheral portion of the upper surface of the device, and the mounting foot 10a provided at the lower end of the frame 10 is fixed to the anchor bolt 22 with the nut 23, so that the light collecting device A is mounted on the rooftop slab S. It is arranged. The control panel 30 for controlling the tracking reflecting mirror 1 is installed on the indoor wall surface, and the wiring 31 to the outdoor unit 33 of the daylighting device A is provided through the daylighting opening 4.

FIG. 7 is a block circuit diagram showing the system configuration. The display operation unit 32 for inputting initial data is formed by using a handheld computer and is a control panel which is an indoor unit.
Reference numeral 30 denotes an arithmetic processing unit 30a that performs an arithmetic operation for controlling the rotation angle of the tracking mirror 1, and a motor driver unit 30b that forms a drive signal for the pulse motors 12 and 15 for driving the reflective mirror based on the arithmetic result. It is composed of. Further, the outdoor unit 33 detects the angle between the motor drive unit 33a that drives the pulse motors 12 and 15 for tracking control and the tracking reflecting mirror 1 by the drive signal sent from the control panel 30 via the wiring 31, It is formed of a position sensor unit 33b that sends the data to the arithmetic processing unit 30a of the control panel 30.

Here, the display operation unit consisting of a handheld computer
By inputting the initial condition settings (latitude and longitude data of the installation position, time data of the internal clock, horizontal, origin data, south-center data, etc.) from 32 to the signal processing unit 30a of the control panel 30, In the signal processing unit 30a, the azimuth and altitude of the sun at each time are calculated based on the time of the internal clock, and the angle (azimuth angle, altitude angle) of the tracking reflecting mirror 1 is determined. A drive signal for controlling the pulse motors 12 and 15 for tracking is formed by the motor driver section 30b so that the set angle is obtained. On the other hand, the motor drive unit 33a of the outdoor unit 33 controlled by the drive signal is the pulse motor 1
The azimuth angle and altitude angle of the tracking reflecting mirror 1 are set so that the reflected light of sunlight is reflected right below by the rotation of 2,15.
Therefore, the reflected light from the tracking reflecting mirror 1 is introduced into the daylighting opening 4 via the converging lens 2 and the diffusing lens 3, and the sunlight taken indoors is used as the illumination light.

The conventional example will be described below. Now, the reflected light reflected by the tracking reflecting mirror 1 driven so as to track the sun is focused by the converging lens 2 and then returned to substantially parallel light by the diffusing lens 3, and the lighting aperture 4 and the light guide path. Since it is designed to be taken into the room via 5 and the lighting opening 4 and the light guide path 5 can be made small, for example, the structural strength of the building is reduced when it is installed on a rooftop slab or a roof. Can be prevented. Further, since the Fresnel lens is used as the converging lens 2 and the diffusing lens 3, it is possible to provide a daylighting device having a better light-collecting efficiency and a lower cost than a conventional example using a parabolic mirror. Furthermore,
This in the prior art examples to freely adjust the vertical position relative to position the diffusion lens 3 of the convergent lens 2, as shown in FIG. 8 (a) (b), both lenses 2 of the focal length f _1, f _2, By arranging 3 with a lens interval D ₀ (= f ₁ −f ₂ ) such that both focal points F ₁ and F ₂ coincide with each other as shown in FIG. The converged and diffused light due to becomes parallel light, and even if the light guide path 5 is long, the light can be collected without deteriorating the light collection efficiency. On the other hand, if the lenses are arranged with a lens spacing D ₁ (<f ₁ −f ₂ ) as shown in FIG. 9 (a), the convergent diffused light by both lenses 2 and 3 becomes diffused light that is close to parallel light, and It can illuminate a wide range with low illumination. Furthermore,
If the lens spacing D ₂ (> f ₁ −f ₂ ) is arranged as shown in FIG. 9 (b), the convergent and diffused light by both lenses 2 and 3 becomes a convergent light close to parallel light, and a narrow range directly below Can be illuminated with high illuminance. Therefore, the form of the light introduced through the daylighting opening 4 is changed (parallel light, diffused light, convergent light) according to the state of the light guide path 5 and the state of use of daylighting (such as the irradiation range of daylighting). It is possible to do lighting according to the situation of the site. For example, if the diameter of the tracking reflector 1 is 650 mm
φ, the diameter of the converging lens 2 is 500 mmφ, the diameter of the diffusion lens 3 is 2
When 00mmφ and the diameter of the lighting opening 4 is 150mmφ,
When the floor surface of about 4 tatami mats 2700 mm directly below the lighting opening 4 is illuminated by diffused lighting, an illuminance of about 150 to 200 lx can be obtained. Also, when the floor surface is illuminated with parallel light, the illumination range is about 300 mmφ and 2000-3000 lx
A certain level of illuminance (illuminance at which the plant grows sufficiently) is obtained, and the plant can be grown indoors.

FIG. 10 shows another construction example in which the daylighting device A is installed on a veranda on the south side of a condominium, etc., and the reflected light of sunlight from the tracking reflecting mirror 1 is always reflected in the horizontal direction. The parallel light converged and diffused by the converging lens 2 and the diffusing lens 3 is introduced in parallel with the ceiling surface through the light-guiding opening 4 and the light guide path 5 formed of the opening formed in the beam of the outer wall W. The tilt angle (set to 45 ° in the illustrated example) is illuminated downward by the adjustable reflecting mirror 6. In this case, since the daylight output from the daylighting device A is parallel light, even if the place where the illumination is required is far from the outer wall of the building (a place away from the window, a room without a window, etc.), the daylighting efficiency is poor. Never be. The rotary arm 13 to which the tracking reflecting mirror 1 is rotatably attached is rotatably attached to a support arm 11a provided upright on the daylighting cover 20 'so that it can be rotated about two axes. Pulse motor
It seems that the sun can be tracked by 12,15. Further, fireproof net-glass is attached to both end surfaces of the light guide path 5. Alternatively, the reflecting mirror 6 may be used as a convex mirror to diffuse the light collected by the lighting device A to widen the irradiation range.

The conventional example as described above improves the light-collecting efficiency as compared with the above-mentioned conventional example, but has a problem that sufficient daylight cannot be obtained yet.

[Purpose of device]

The present invention has been made in view of the above points, and an object of the present invention is to provide a daylighting device in which a daylighting opening and a light guide path can be made small, and moreover, the daylighting efficiency is good and the cost is low. It is in.

[Disclosure of device]

The present invention is a convergence reflector consisting of a tracking reflector that tracks the sun and reflects the direct light of the sun in a certain direction, a Fresnel lens that converges the reflected light reflected by the tracking reflector, and a convergence lens that converges the light. In a daylighting device equipped with a diffuser lens consisting of a Fresnel lens that converts the converged light into substantially parallel light, a funnel-shaped reflection with an entrance-side opening diameter outside the both lenses that is larger than the diameter of the converging lens A mirror is provided, and a cylindrical light guide duct whose inner surface serves as a verification surface is connected to the exit side opening of the funnel-shaped reflecting mirror.

(Embodiment 1) FIGS. 11 and 12 show an embodiment of the present invention. In a daylighting device A similar to the basic example, the entrance side aperture diameter of the converging lens 2 is outside the both lenses 2 and 3. A funnel-shaped reflecting mirror 7 having a diameter larger than the diameter and having an inner surface as a reflecting surface is provided, and a cylindrical light guide duct 5a having an inner surface serving as a verification surface is connected to an exit side opening of the funnel-shaped reflecting mirror 7. Here, the funnel-shaped reflecting mirror 7 whose inner surface is a reflecting surface has a diameter that gradually decreases from the upper opening to the lower opening, and the tubular portion 7a formed at the upper end opening contacts the inner surface of the frame 10. , This tube 7a
Is screwed to the frame 10. Also, the light guide duct
5a is made of steel and has an inner surface as a reflective surface, which is extended to the illuminated location.

In the present embodiment, the sunlight and the skylight that are not collected by the tracking reflecting mirror 1 and the converging lens 2 are guided by the funnel-shaped reflecting mirror 7 to the light guide duct 5a for collecting light. As compared with the conventional example shown in FIG. 1, the amount of light collected can be increased and the light collection efficiency can be improved.

(Embodiment 2) FIG. 13 shows another embodiment. In the same daylighting device A as in Embodiment 1, the converging lens 2 and the funnel-shaped reflecting mirror 7 are used.
A second funnel-shaped reflecting mirror 8 having a diameter equal to or larger than that of the converging lens 2 and smaller than that of the funnel-shaped reflecting mirror 7 and having inner and outer reflecting surfaces, respectively, is provided between It is a thing.

Now, in the first embodiment, although the incident light can be collected without passing through the tracking reflecting mirror 1, the funnel-shaped reflection of the sunlight or the skylight as shown in FIG. 14 is made. In some cases, the reflected light from the mirror 7 cannot be effectively captured. However, in the present embodiment, the second
By providing the funnel-shaped reflecting mirror 8, the sunlight or the skylight not passing through the tracking reflecting mirror 1 and the converging lens 2 is generated by the multiple reflection by the reflecting surfaces of both funnel-shaped reflecting mirrors 7 and 8, as shown in FIG. , The light can be taken in more effectively, and the lighting efficiency can be further improved.

[Advantages of the Invention] As described above, the present invention is a converging system that includes a tracking mirror that tracks the sun and reflects the direct sun light in a certain direction, and a Fresnel lens that converges the reflected light reflected by the tracking mirror. A lens and a diffusing lens formed of a Fresnel lens that makes the convergent light focused by the converging lens substantially parallel light, and reduces the daylighting opening and the light guide path,
In a daylighting device with good lighting efficiency and low cost, a funnel-shaped reflecting mirror with an entrance-side opening diameter larger than the diameter of the converging lens and a reflecting surface on the inner surface is provided outside both lenses, and the funnel-shaped reflecting mirror is emitted. A cylindrical light guide duct whose inner surface is a mirror surface is connected to the side opening, and the skylight that is not condensed by the tracking reflector and the converging lens is collected by the funnel-shaped reflector and guided to the light guide path. Therefore, there is an effect that the lighting efficiency can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a conventional example, FIG. 2 is a sectional view of the same as above, and FIG.
FIG. 4 is a schematic configuration diagram of the same as above, FIG. 4 is a cross-sectional view of a main part of the same, FIG. 5 is a perspective view of a main part of the same, FIG. 6 is a cross-sectional view showing an installation example of the same, and FIG. Block diagram showing the configuration, FIGS. 8 and 9 are operation explanatory diagrams of the same as above, FIG. 10 is a sectional view showing another construction example of the same, and FIG. 11 (a) is a sectional view of one embodiment of the present invention. , Fig. 11 (b) is a perspective view of the main part of the above.
FIG. 12 is a schematic configuration diagram showing the operation of the above, FIG. 13 is a sectional view of another embodiment, FIGS. 14 and 15 are explanatory views of the operation of the same, and FIG. 16 is a schematic configuration of another conventional example. It is a figure. 1 is a tracking reflector, 2 is a converging lens, 3 is a diffusing lens, and 5a
Is a light guide duct, 7 is a funnel-shaped reflector, and 8 is a second funnel-shaped reflector.

Claims (2)

[Scope of utility model registration request] 1. A tracking reflecting mirror that tracks the sun and reflects the direct sun light in a fixed direction, and a converging lens including a Fresnel lens that converges the reflected light reflected by the tracking reflecting mirror.
In a daylighting device equipped with a diffusing lens composed of a Fresnel lens that converts the convergent light converged by the converging lens into substantially parallel light, the entrance side aperture diameter is reflected outside the both lenses to be larger than the diameter of the converging lens. A daylighting device characterized in that a funnel-shaped reflecting mirror having a surface is provided, and a cylindrical light guide duct whose inner surface is a mirror surface is connected to an exit side opening of the funnel-shaped reflecting mirror. 2. Between the converging lens and the funnel-shaped reflecting mirror,
A second funnel-shaped reflecting mirror having an entrance-side aperture diameter equal to or larger than the diameter of the converging lens and smaller than the funnel-shaped reflecting mirror and having inner and outer reflecting surfaces, respectively, is provided. The daylighting device according to claim 1, characterized in that the utility model is registered.