JPH03249610A - Light collecting device - Google Patents

Abstract

PURPOSE:To improve the carrying efficiency by arranging an optical fiber at the incidence opening of an optical duct and a Fresnel lens at the rear stage of the optical fiber. CONSTITUTION:In a sun light utilization system which guides the sunshine beam in from the optical duct 12 through a waveguide duct 18 and guides it in rooms, the optical fiber 14 is arranged at the incidence opening 15 of the optical duct 12 and the Fresnel lens 16 is arranged at the rear stage of the optical fiber 14. The guide-in light can, therefore, be converted into the parallel light beam at all times and the light can be carried in the respective rooms. Consequently, the carrying efficiency can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) [Field of Industrial Application] The present invention relates to improvements in daylighting devices used for lighting and air conditioning in residential buildings, office buildings, and the like.

(b) [Conventional technology] Traditionally, daylighting devices guide outdoor light indoors.

As shown in Japanese Unexamined Patent Publication No. 62-96914.

Sunlight concentrated by a lens or the like was transmitted to a suitable room using an optical fiber, and a light diffuser was used at the exit of this optical fiber to introduce the sunlight into the required room.

In addition, as another conventional example, a solar ray utilization system has been introduced in which the sunlight is introduced indoors through a light duct.

(1986 Japan Solar Energy Society/Japan Wind Energy Association/Joint Research Presentation Proceedings, page 169~
(Page 172) (c) [Problems to be Solved by the Invention] By the way, the conventional lighting device configured as described above has the following problem.

■The altitude and direction of the sunlight that is taken in changes depending on the time of day and season, so it is
It cannot be introduced as parallel light beams, and is reflected back and forth in the light duct.

Transported indoors.

As a result, the conveyance efficiency changes, and it only functions effectively for a limited time.

■For this reason, an expensive and complicated tracking device is required to track the sun.

An object of the present invention is to provide a daylighting device that solves the above-mentioned problems of the conventional device.

(C) [Means for Solving the Problems] The present invention provides a solar ray utilization system in which sunlight is taken in from a light duct through a light guide duct and guided indoors, and an optical fiber is connected to the entrance of the light duct. By arranging a Fresnel lens after the optical fiber, the incident light is introduced into the light guide duct side as parallel light.

In this case, the optical fiber uses a plurality of crand-type optical fiber elements consisting of two layers, a crand layer and a core layer, and a plurality of holes are provided that reach the core layer from the cladding layer of these optical fiber elements. It is desirable to provide a lighting device in which the lighting devices are arranged side by side on the same plane to form a lighting surface.

(E) [Function] The daylighting device of the present invention uses the combination of optical fiber and Fresnel lens to introduce sunlight into the room as parallel rays, so the light guide duct provided at the primary stage is can be efficiently transported to each room.

In addition, to deal with changes in the angle of incidence over the course of a day due to the movement of the sun, or changes in the angle of incidence between seasons, we can use multiple clad optical fibers, each consisting of two layers: a cladding layer and a core layer. The structure is such that a plurality of holes extending from the cladding layer to the core layer are arranged side by side on the same plane to form a lighting surface, so that the core layer on the rough surface of the cladding layer The amount of solar rays introduced is It can be introduced evenly without changing much depending on the movement of the sun, and after introduction, as mentioned above, it is converted into parallel rays through the Fresnel lens and transported indoors, so the light sent to the light guide duct is always It can be a predetermined amount of parallel rays.

(F) [Embodiment] Next, an embodiment of a daylighting device according to the present invention will be described based on FIGS. 1 to 3.

Figure 1 shows an example of a house using the present invention, with the building facing south, 1 room on the 1st floor, 2 rooms on the 2nd floor. There are 3 baths and 4 kitchens on the north side. Basement basement 5. The roof 6 has a lighting device.

In this building, the basement/room 5 is, of course.

There are no windows in the bath 3 and kitchen 4 on the north side, so there are 2 surrounding walls 8
while making the insulation wall sufficiently thick.

The daytime illumination of these rooms uses the light from the daylighting device (9.10.11), and the light is distributed to each room (3.4) by the light diffusion device (9.10.11).
．． 5.

In this case, the lighting device 2 is constructed with a light collector body 11 fitted into the roof 6 as shown in FIG. 9.

The specific structure of this Mitoritori human body 1 unit is shown in Figure 2 (a) to (
As shown in c), for example, a light duct 1 with a rectangular cross section
A lighting surface 15 is constructed by arranging n optical fiber elements 14a1 to 14a horizontally on the same plane so as to be inscribed on one side (upper side in FIG. A rectangular Fresnel lens 16 is arranged so as to be inscribed in the light duct 13, and the lower end of the light duct 13 is connected to the light guiding duct 18.

As the optical fiber elements 14a to 14a, a clad type fiber having a two-layer structure consisting of a cladding layer 29 and a core layer 30 is used. The outer peripheral surface having a plurality of holes 17 extending from the core layer 30 to the core layer 30 is formed and arranged in a rough surface state.

In this way, as shown in the same figure (b), the light efficiently introduced from the rough surface of each optical fiber element passes through the Fresnel lens 16 and becomes parallel light beams, which are effective toward the light guide duct 18 side. can be transported to

The light guiding duct 18 is a cylindrical duct whose entire inner wall is used as a light reflecting surface, as shown in FIG.

For the rooms 3, 4.5, which are integrated into the building as fixed ducts passing through the walls 8 and the ceiling 21, and through which the light is guided.

While outside air and temperature-controlled air are supplied through the looper 22, 23, and 24, there are ventilation ducts and ventilation channels that can also be used as ventilation ducts or ventilation paths to discharge dirty air outdoors. A fan 32 is provided.

Note that 25 and 26 are auxiliary ducts for supplying outside air and temperature-controlled air to the room 12 facing the south side, and for ventilating these rooms. It is communicated with the duct 18.

In the above configuration, during the day, sunlight is collected by the daylighting device 7 and not only is supplied to each room 3, 4.5 on the north side, but also the same device is used to supply outside air and temperature-controlled air. It can also supply air or ventilate dirty air.

These rooms 3, 4, and 5 do not necessarily have windows (lighting).

This eliminates the need for ventilation (ventilation), increases the degree of freedom in arranging rooms in a building, and insulates each room.

Heat insulation and soundproofing have become relatively easy, creating energy-efficient buildings, air conditioning that utilizes energy inside and outside the building,
This is what makes lighting possible.

(G) [Effects of the Invention] Since the present invention is configured as described above, it has the following excellent effects.

■Optical fibers have multiple holes that reach from the cladding layer to the core layer, and are arranged to form a lighting surface, so it is possible to track the sun without the need for large-scale tracking devices like in the past. In response to this, solar rays can be effectively taken in throughout the day, and as a result, the entire device becomes economical because a tracking device is no longer required.

■By placing a Fresnel lens after the optical fiber, the introduced light is always converted into parallel light beams and transported into each room, making it possible to significantly improve transport efficiency.

[Brief explanation of drawings]

Figures 1 and 2 show one embodiment of the present invention, and Figure 1 of the inner box is a schematic longitudinal sectional side view showing the overall structure of the daylighting device to which the present invention is applied, and Figure 2 is a side view of the lighting device. Examples of the handle body, of which (a) is a perspective view, (b) is a front view, and (c) is a perspective view.
is an enlarged front view of the main part. Dish: Light collector Human body 13: Light duct 14a, ~ 14 a n: Optical fiber lighting surface Fresnel lens Light guiding duct

Claims (1)

[Scope of Claims] 1. In a solar ray utilization system in which sunlight is taken in from a light duct through a light guide duct and guided indoors, an optical fiber is provided at the entrance of the light duct, and a Fresnel lens is provided at the rear stage of this optical fiber. 1. A lighting device characterized by being arranged so that incident light is introduced into a light guide duct side as parallel light beams. 2. As optical fibers, multiple clad-type optical fiber elements consisting of two layers, a cladding layer and a core layer, are used, and these optical fiber elements are provided with a plurality of holes reaching from the cladding layer to the core layer. The lighting device according to claim 1, wherein the lighting device is arranged side by side on a plane to form a lighting surface.