SOLAR SHADING PANEL FOR NORTH AND SOUTH SIDES

Technical Field

Fields of engineering and architecture in connection with shading for buildings Background Art

To design buildings for daylight utilization by bringing in natural light from the side of the building, regardless of direct radiation protection which has high energy, it will cause many problems from glare, ultra violet radiation (UV), which is harmful to the eyes and health. The heat from direct ray affects human thermal comfort and cooling loads and power consumption of air conditioning systems. In addition, the ultraviolet (UV) ray from direct sunlight accelerates the deterioration process of human skin, interior finishing materials, and furniture.

Using shading to prevent direct radiation may be done by various techniques, such as the use of various materials in various forms. Many of shadings used in the past and present consist of long and flat panels, which could be horizontal panel, vertical panel, or egg-crate (mixed horizontal and vertical panels) with both kinds of deadlocks and an adjustable angle, including using opaque or transparency materials to block the direct sunlight and perforate in various ways to get some light and outside views.

Horizontal shading panels, such as a sun shading device of the European patent application number EP20090151751 (30 ^th January, 2009), the horizontal sun-shading device with adjustable louvers of the China patent publication number CN201433527 Y (31 ^st March, 2010), the solar window shade of the US patent publication number US8528621 B2 (10 ^th September 2013).

Vertical shading panels, such as the window blind of the US patent publication number US2882563 A (21 ^st April, 1959) and the split vertical window blind of the US patent publication number US8746319 Bl (10 ^lh June 2014)

Vertical and horizontal shading screens and other solar screen panels such as the self- regulating solar window device of the US patent publication number US 4279240 A (21 ^st July, 1981), the flat sheet panels, such as the variable screening US patent publication number US20120061029 Al (15 ^th March, 2012), and the Curtain system of the US patent publication number US 20130139976 Al (6 ^th June, 2013) Solar shading currently has several drawbacks. In general, the deadlock shadings are unable to prevent the direct light throughout the year. In order to prevent direct light at all the time, the panels or materials must be overlapped, which is wasteful and obscure the external views. Sunscreen panels need to be angled in the direction that could protect direct sunlight and it is unease to use. The use of electronics equipment to adjust shading devices angles are costly of investment and maintenance and may cost problems in the long term.

The sunscreen opaque panels, which have holes or are perforated evenly, allow building users to perceive external view, but they are still not as efficient or could protect direct sunlight all year round. Increasing the thickness of the sheet or having shadings together with the voids may be better for sun protection, but they are still in efficient due to materials are overlapped more than necessary.

This invention is the invention relates to a solar screen or a shading panel, which consists of a frame and an opaque panel with the spacing perforates attached to the hollow cylinders to get natural light and exterior views. The upper part of the cylinder protects direct sunlight and the lower part of the cylinder receives and reflects indirect sunlight into the interior space. The proportion of the extended part or the depth of the cylinder and the tilt angle vary in relation to the cylinder's diameter and the latitude of the installation site.

The aim of the invention of this solar shading panel for north and south sides is to be a fixed sunscreen panel for the use of north and south walls, openings, doors, and windows in order to get natural light and to prevent direct light from the sun without the need of mechanical devices to adjust the angle for sun shading. The shape and form of the shadings and openings are designed to follow its functions, use less material (optimization design), provide an economical price, easy to use and clean, low maintenance, while it is effective in preventing direct light from entering into the building. This helps to create good internal environment for both, the temperature and lighting. Since it could reduce heat, glare, and ultraviolet radiation from direct light, which is harmful to eyes and skin. The sunlight that is allowed to entering into the building is the indirect light, which the light is in good quality and could improve comfort conditions for building users. In addition, it will help to reduce energy consumptions for lighting and air conditioning systems. It also helps to maintain the building materials and furniture, not to wear out faster. It also allows building users to overlook outside evenly throughout the day. It could be produced using various materials and could be applied in different forms and sizes. Disclosure of Innovation

The design concept is to develop from a shading cylinder unit and then assembled several units by attaching to an opaque panel with spacing perforates and a frame to provide a panel that can be used as part of walls, openings, doors, windows, or could be applied to other parts of the building. The cylinder units which the form is designed to follow functions, which is a combination of receiving indirect light and protecting direct light from the sun. The proportion of the diameter, the width, and tilt angle of the cylinders are from calculations, which correspond to the sun position of a critical design day that varies with the latitude of the location. The front panel is used for the north side, while the rear of the panel is used for the south side. It could fix- installation and could prevent direct sunlight at all the time without using mechanical devices.

The critical dates, which are used to calculate and design to protect direct sunlight from the north side, are 21-22 June for the northern hemisphere and 21 -22 December for the southern hemisphere.

The critical dates, which are used to calculate and design to protect direct sunlight from the south side, are 21-22 December for the northern hemisphere and 21-22 June for the southern hemisphere.

Figure 1 shows front of the solar shading panel, which is used for the north side for the northern hemisphere and for the south side for the southern hemisphere. The solar panel for north and south sides consists of a frame (1 ) and an opaque panel (2) with the spacing perforates attached to the hollow cylinders (3) in order to get natural light and to allow building users to perceive external view, wherewith the upper part of the cylinder is for protecting direct light partially or throughout the year and the lower part of the cylinder is for receiving and reflecting natural light into the building.

Figure 2 shows back of the solar shading panel, which is used for the south side for the northern hemisphere and for the north side for the southern hemisphere. The solar panel for north and south sides consists of a frame (1 ) and an opaque panel (2) with the spacing perforates attached to the hollow cylinders (3) in order to get natural light and to allow building users to perceive external view, wherewith the upper part of the cylinder is for protecting direct light partially or throughout the year and the lower part of the cylinder is for receiving and reflecting natural light into the building.

Figure 3 shows cross section of the frame (1), the opaque panel (2), and the middle of the hollow cylinder which the tile angle slope down towards the back. Figure 4 shows the cross section detail of the solar shading panel for north and south side. The hollow cylinder (3) is attached to the opaque panel (2), which is perforated periodically and the perforate area equals to the section plane area of the cylinder. The proportion of the extended part (4) or the depth of the cylinder is between 0.3-0.6 of the cylinder's diameter (5). The tilt angle of the cylinder's section plane and the vertical plane (6) equals to the latitude of the installing location ±10 degrees (between -5 to 31 degrees for Thailand). The most effective tilt angle equals to the latitude of the installing location. The distance between the opaque panel and the upper and lower rims of the cylinder is better to be set equally. The opaque panel (2) may be placed parallel to the vertical plane or the cylinder's section plane or in between the vertical plane and the cylinder's section plane.

The upper part of the cylinder (8) helps to prevent direct sunlight and the bottom of the cylinder (9) receives and reflects light into the internal space. At the very top of the cylinder (8) and the ramp-up to be effective in preventing direct light from the north side for the northern hemisphere and for the south side for the southern hemisphere (10). At the bottom of the cylinder (8) on the slope down is to be effective in preventing direct light from the south (1 1) for the northern hemisphere and for the north for the southern hemisphere to get through the cylinder partially or throughout the year.

Brief Description of Drawings

Figure 1 shows front of the solar shading panel

Figure 2 shows back of the solar shading panel

Figure 3 shows cross section of the solar shading panel

Figure 4 shows cross section detail of the solar shading panel

Best Mode for Carrying out the Invention

As mentioned in the section of invention discloser