FR2837261A1 - Adjustable solar reflector, has arrangement for following the trajectory of the sun to illuminate a large area situated in shadow - Google Patents

Abstract

The reflector (1) has a variable curvature, and can be either convex or concave, with a optical divergence unit. It is mounted on an inclination arm (2) pivoted on a fork fixed to a vertical rotation gear (3) resting on a horizontal support base (4). This arrangement enables the reflector to be pointed at the sun to capture its radiation.

Description

the annular bead (32) is arranged at the end of the protuberance

(31).

DESCRIPTION

  The present invention relates to an apparatus intended to reflect the rays of the sun,

  in a stable way, in a beach located in the shade.

  The reflection of the sun's rays towards a shaded area is traditionally carried out by a fixed mirror. Therefore the reflected surface presents the inconvenience of moving according to the course of the sun. On the other hand, the reflector used is often a flat mirror reflecting only a range.

  substantially equal to its own surface.

  The device according to the invention makes it possible to remedy these drawbacks. It indeed has, according to a first characteristic, a reflector secured to a two-axis equatorial mount, motorized or not, which allows it to follow the path of the sun and therefore to obtain a

  stable positioning of the reflected surface.

  The second characteristic of the reflector used is that it is of the curved type. Its curvature is a function of the distance available between the device and the reflected surface and of the dimensions

desired for this surface.

  According to particular embodiments:

  - the reflector used can be concave or convex, of fixed or variable curvature.

  - if the reflector is concave, an optical device is permanently placed in its focus, so as to disperse the sun's rays, to obtain a stable reflected surface and at

desired dimensions.

  - the adjustment of the equatorial mount can be manual, or remote controlled, or controlled on the

trajectory of the sun.

  - if the adjustment of the equatorial axis is automated, the stepping motor control can be obtained from photoresist sensors. The setting of the date axis can be

manual or remote control.

  - if the settings of the equatorial axis and the axis of the wind date automated, the control of the stepper motors will be obtained from electronic motorization systems, with

  piloting software, used in astronomical or solar energy.

  The accompanying drawings illustrate the invention:

  Figure 1 shows the block diagram of the invention.

  Figure 2 shows in section, the device of the invention

  Figure 3 shows in section, a variant of this device.

  With reference to these drawings, the device comprises a reflector (1) with adjustable curvature, integral with a pivoting arm (2) provided with a counterweight (10) This assembly is supported by a fat (3) having an end (5 ) in fork (6)

  including a transverse axis (7) through the two branches and the pivoting arm.

  The other end (8) of the fat rests on a bearing or a ball crown (9)

  placed in a support base (4) of the entire device.

  This device allows a combined movement of the reflector along two axes,

  allowing to follow the trajectory of the sun.

  - 2 - the transverse axis (7) of the pivoting or azimuth arm (2), allows an inclination of the reflector (1)

  to allow him to follow the position of the sun according to the date.

  - the longitudinal axis of the fat (3) or equatorial axis allows rotation of the reflector (1) for it

  allow to follow the course of the sun.

  The combined movements of rotation and tilt of the device draws wind carried out for each by a stepping motor (11) and (12) meshing on a toothed wheel (13) and (14) integral with the fat (3) or the arm swivel (2). One is fixed on the base (4) supporting the fat, the other on

  a branch of the fork (6) supporting the pivoting arm (2).

  Each movement can also be manually actuated by a removable crank handle (15) and (16), with square drive of a toothed wheel axle (17) and (18)

  positioned symmetrically with the stepper motors (11) and (12).

  The power supply and the electronic control of the stepping motors (11) and (12) is not shown in the drawing. The means used for this purpose are those commonly used in remote control or full automation of equatorial spectacle frames

astronomical or solar ovens.

  The reflector (1) with adjustable curvature, shown in the drawing, is made up of radiating sectors (19) with overlap, tightened in their center by two discs (20) forming the nut of a pushing screw (21) for adjusting curvature, and presenting to his head a square of maneuver

for removable crank.

  On the periphery of the reflector (1), the sectors (19) slide in lights

  housed in the frame (22) fixed to the end of the pivoting arm (2).

  An intermediate template (23) can facilitate, if necessary, the quality of the curvature of the reflector (1) by relying on the sectors (19). It is adjusted by pushing screws (24) positioned on the central part of the frame (22) According to a variant not illustrated, the reflector (1) can be designed so as to obtain

  both a convex curvature, and after switching to planar mode, a concave curvature.

  The frame (22) in this case has a concave shape. The end of the swivel arm (2) forms the nut of the adjusting screw. This crosses the discs (20) while keeping them free from

  on both sides by support nuts blocked by locknuts.

  In the form of embodiment according to Figure 2, the device is more compact. The frame of the reflector has a transverse axis articulated directly on the branches of the support fork. The base thereof is brought back to the level of the support base of the assembly, in a manner integral with the lower part of the body. The base can thus be fixed indifferently on a plane

horizontal or on a vertical plane.

  The reflector can be concave or convex and with fixed curvature. Its composition can vary depending on existing technologies: materials, structures, coatings, so

  get the best possible return.

  The device according to the invention is particularly intended to reflect the rays of the sun on areas located in the shade: facades of buildings, buildings, houses, gardens, terraces, etc.

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Claims (6)

  1) Device for lighting a fixed area in the shade, characterized in that it includes an adjustable solar reflector (1), to adjust the dimensions of the reflected surface, and orientable, so that it does not move with the course of the sun. (Fig.1) 2) Device according to claim 1 characterized in that the solar reflector (1); is composed of radiating overlapping sectors (19) sliding in a frame (22) clamped in the center between two discs (20) and of curvature adjustable by a screw (21) (Fig.2) 3) Device according to claim 1 characterized in that the solar reflector (1) is mounted on two axes (3) and (7), of rotation and inclination, so as to follow the course of the   and reflect the rays in the chosen shadow area (Fig. 2).   4) Device according to claim 2 characterized in that the solar reflector (1) of adjustable curvature is either convex (Fig. 2) or concave, completed in the latter case by a   divergent optical device positioned in the vicinity of its focus.   ) Device according to claim 3 characterized in that the reflector (1) is   place on a vertical barrel (3) (Fig. 2), in order to raise it above the horizontal laying plane.   6) Device according to claims 1 and 3 characterized in that a fork (6)   reflector support (1) is compactly placed near the support base (4)   ['the whole device (Fig.3) whose installation plane is vertical or horizontal.   7) Device according to claims 1 and 2, characterized in that the settings of   curvature, orientation and tilt of the reflector (1), can be done manually.   8) Device according to claims 1 and 3, characterized in that the settings   of orientation and inclination of the reflector (1), wind carried out in a semi-automated manner, by a remote control.   9) Device according to claims 1 and 3, characterized in that the settings   orientation and inclination of the reflector (1), wind carried out in a fully automated manner,