WO2015087116A1

WO2015087116A1 - A reflector for illumination

Info

Publication number: WO2015087116A1
Application number: PCT/IB2013/061342
Authority: WO
Inventors: Yasin ARIKAN
Original assignee: Dmy Mühendi̇sli̇k Elektri̇k Maki̇ne İnşaat Ve Bi̇li̇şi̇m San. Ti̇c. Ltd. Şti̇.
Priority date: 2013-12-13
Filing date: 2013-12-26
Publication date: 2015-06-18

Abstract

The present invention relates to a reflector (3) for lighting armatures, characterized in that it contains a reflecting body that is configured as a rotating paraboloid form such that it contains a polygonal peak section (8) to attach a light source (2) and base segments (5) that are composed of a preferably polygonal skirt (9) which provides an opening through which emitted light can be scattered, an inner region to accommodate the light source (2), and radial side segments (6) that are composed of reflecting surface units around an axis extending from the peak section (8) to the skirt (9) portion. The present invention relates to a reflector which increases the level of illumination while decreasing energy consumption in usage areas with high energy consumption for illumination.

Description

A REFLECTOR FOR ILLUMINATION

Technical Field

The present invention relates to a reflector comprising of multiple reflecting surfaces which increase the illumination level while decreasing energy consumption in usage areas with high energy consumption for illumination. The aim of the invention is to provide the refraction and reflection of light in the right manner to achieve homogenous and efficient illumination.

Background Art

The invention relates to a reflector comprising of several reflecting surfaces that would increase the level of illumination with low energy consumption and cost particularly in outdoor and high-ceiling illuminations. Achieving energy efficiency is aimed in such areas as ports, airports, stadiums, tunnels, motorways, industrial facilities that necessitate illumination from a high ceiling, logistics facilities, hangars, factories and the like with the use of the product that is the subject matter of this invention.

In the current state of the art, illuminating areas outdoors and indoors within facilities having high ceilings is a considerably costly process which entails the use of mercury, sodium or metal halogens in light bulbs in the classical method of illumination. Typically the source of illumination is enclosed by a flat aluminum body. In this method, light rays emitted by the source are reflected by the aluminum enclosing thus decreasing the efficiency of the rays. Under these circumstances higher levels of energy are used with increased cost.

These rays reflected by the surface lead to heating and even blackening over time. Efficiency of rays reflected by blackened surfaces is further diminished considerably. As a result, low levels of illumination are achieved with increased energy consumption and cost. Here, illumination can also be referred to as the amount of light hitting a surface.

Some improvements have been developed in the state of the art in order to increase the efficiency of reflectors that are present in the structure of lighting apparatus. For example, the invention that is the subject matter of the application TR 2005/02979 includes identically sized embossments that are lined next to each other and having square cross-sections on a circular reflector surface. The purpose here is that light rays emitted by the source will be reflected by the dome-shaped structure on the upper surfaces of embossments. These embossments that are placed on a circular sheet, however, cannot reflect the light with the desired intensity, nor can the reflected light can be utilized with desired angles. Another disadvantage of said invention is that shadows are formed on the illuminated surfaces due to the reflector structure.

Moreover, reflection of the light source is split into many light points which leads to the situation referred to as glare. This situation is observed particularly in the types of lighting systems described in documents EP0735311 A1 or EP0479042 A2. Since components of the reflectors are designed to deflect or expand the light beam, these are formed by convex or concave mirror components that do not have any discontinuities on their surfaces.

Another document in the state of the art with regard to improving reflector efficiency is TR 2011/07604 which describes an armature reflector having a white coating. Said reflector's surface that is facing the light source is covered with a coating that is formed with resins that provide specific colors and that contain light reflecting pigments. Using various coatings in the reflector structure increases the cost while also failing to provide the desired efficiency in the reflection factor. In addition, the reflector that is the subject matter of said application refracts light inefficiently due to its planar surface.

The product that is the subject matter of the application DE 4406458 A1 is an example for reflectors having a domed upper surface. It is stated in this document that reflecting components are made of light expanding material and that they have a domed upper surface, as well as a planar bottom surface that is coated with a reflecting layer. Another improvement in the said field is described in document DE 2535174 A1, where certain light spectrum bands are developed to be used in conjunction with known light sources. Said reflector surface is coated with a protective layer and thus manufacturing costs are increased.

Another example for the state of the art is the patent application US 6464378 B1. In this example, panels that are present in the structure of the reflector are coated with a reflecting material and can be folded by hand. The reflector that is the subject matter of the patent application US 2010/0246189 has a concave shape and contains an anodized plate on its front surface. Similarly, the concave-surfaced reflector disclosed in the document EP 0774618 A1 provides illumination with less shading. In this case, an aluminum base is coated with fifteen layers of quartz and titanium dioxide.

Coatings help mix the interference colors of the layers to achieve white light and they also help include the rays that create undesired effects in scattered light. A known disadvantage of such reflectors is that they reflect undesired spectral units such as infrared radiation into the environment. In addition to that, they are also harder to manufacture. In the invention that is the subject matter of the application, reflecting plates are made of high-grade aluminum and fashioned as flat panels, whereas they can also be given concave or convex shapes per demand.

Flat reflecting plates used in the state of the art and the quality of the coated material decreases the efficiency of the rays reflected by the illumination reflector. Moreover, reflecting plates also get darkened over time, leading to further decrease in the efficiency of the rays. An illumination reflector is needed such that the efficiency of reflected rays would not decrease due to usage and the coating that is applied to the reflector would not get darkened. The invention that is the subject matter of the application aims to solves these problems prevalent in existing products in the state of the art.

Detailed Description of The Invention

The invention relates to a reflector (3) that would be used in industrial facilities that require usage of high energy for illumination, logistics facilities, hangars and factories, and that would decrease energy consumption and thus cost while increasing the level of illumination.

The invention that is the subject matter of the application aims to provide solutions to problems in the current state of the art. With the subject matter of this application which, in particular, relates to illumination armatures used outdoors the reflecting surface of a reflector (3) is partitioned into several smaller sections that possess certain reflecting characteristics. In this way, reflection characteristics that cannot be achieved or can very hardly be achieved with a smooth surface are aimed to be achieved.

Figure 1, which is provided to describe the reflector (3) that is the subject matter of the invention in more detail depicts an armature structure in a transparent fashion. In this armature structure, a ballast box (1) and an external case (4) are present at the very top. The ballast box (1) is a circuit component that creates high voltage during at the starting of the operation and constrains the current afterwards.

A reflector (3) is placed inside the external case (4) and a light source (2) is placed inside the reflector (3). The reflector (3) that is the subject matter of the invention has a circular rotating paraboloid shape with a generally upward facing peak. Thus the interior region of this paraboloid is suitable to house a light source (2). Light rays emitted by the light source (2) are reflected by the reflector (3) that is the subject matter of this invention. The exterior case (4) is preferably made of aluminum and scatters the rays reflected by the reflector (3) without losing efficiency.

The reflector (3) is essentially composed of several reflecting surfaces that can have concave, convex, or planar structure. The desired reflector body that has a one-piece or integral structure is formed by cutting or bending a metal plate that is preferably made of high-grade aluminum.

Although the reflector (3) can generally have a circular rotating paraboloid shape, it has a three dimensional structure that allows the formation of a rotational paraboloid shape when its exterior rings are brought together, as can be seen in more detail in Figures 2 and 3. It is composed of a base segment (5) and side segments (6). Side segments (6) can be of any geometric shape, but each are preferably composed of reflecting surface components that have an isosceles trapezoid shape.

The reflector (3) includes a skirt (9) and peak (8) sections. The sides of the isosceles trapezoids that are parallel to each other get shorter along as moved from the skirt (9) portion to the peak section (8). The shortening sides of the isosceles trapezoids intersect at on a base segment (5) of the peak section (8). The reflector (3) has an inner and an outer circumference that are concentrically centered on an axis that extends toward the floor from the peak section(8) of the reflector (3). The reflector (3) preferably has an axially symmetrical structure. Size, dimension and layout of the reflecting surface units that make up the side segments (6) can be adjusted in accordance with demand.

The reflector (3) can be adjusted to include an assembly wing (7) at its skirt (9) section so as to be accommodated to the lighting device structure.

In sum, the reflector (3) that is the subject matter of the invention is characterized by its comprising of preferably a polygonal peak section (8) for the light source (2) to be attached and base segments (5) that are made of a preferably polygonal skirt (9) that provides an opening for the light to be emitted through; an interior region to house the light source (2); and a reflecting body that is configured in the form of rotational paraboloid form, which has many radial side segments (6) that are made of reflecting surfaces laid out one after the other. In its preferred embodiment, the reflecting body is comprised of polygonal base segments (5) that are laid out concentrically, one after the other, such that they would form a rotational paraboloid form whose external circles are rotating.

According to its preferred embodiment:

The reflecting body is generally axially symmetrical.

Reflecting surface units preferably have isosceles trapezoidal form. Base segments (5) preferably have isosceles polygonal form.

Base segments (5) are configured such that their diameters would increase, moving from the peak section (8) toward the skirt (9).

Number of side segments (6) is preferably between 12 and 160. Diameter of the reflecting body is between 100mm and 420 mm.

Height of the reflecting body is preferably 100mm - 450mm.

Base segments (5) are preferably of polygon shape having 3 to 16 sides.

Width of the edges that make ups the reflecting surfaces are preferably between 5mm and 80mm.

As it is known, materials with high coefficients of reflection are preferred to achieve maximum efficiency in the usage of the light source (2). Further, properties like corrosion resistance and ease of shaping or processing flexibility of the material used are of importance with regard to creating durable products.

Various problems in the state of the art as it pertains to the use of various coatings to achieve reflecting quality are aimed to be solved with said invention. The reflection plates that are present in the structure of the reflector (3) are made of high-grade aluminum that has reflection properties with increased durability and resistance to blackening. Aluminum material does not get darkened or decrease efficiency even when subjected to reflected light rays for extended periods of time. In addition, reflecting plates that are manufactured flat can also be formed to have concave or convex shapes. Thus, reflecting surface units or side segments (6) with flat surfaces, with concave surfaces, and with convex surfaces are within the scope of the embodiments of the invention.

Properties of aluminum used in the reflector (3) structure that are obtained through various tests are presented below.

Type	Reflection Coefficient	Total Reflection		Reflection of Reflected		Reflection of Scattered	Alloy	Rigidity	Minimum Tension (MPa)	Minimum Compression (MPa)	Minimum % Flex A5A10
Type	Reflection Coefficient	ASTME 1651	DIN 5036-3	60 degree long	60 degree trans	DIN 5036-3	Alloy	Rigidity	Minimum Tension (MPa)	Minimum Compression (MPa)	Minimum % Flex A5A10
Reflecting	99.99% Pure Aluminum	>=95	>=95	90	82	<11	1085	H18	125	105	2
Highly Reflecting	99.99% Pure Aluminum	>=95	>=95	91	91	<6	1090	H18	125	105	2

Table 1 - Technical information on aluminum

As explained in the state of the art, anodized plates are materials used in reflector structures. However, using anodized plates increases costs and cannot provide the desired efficiency in the long run. This problem is solved by using high-grade aluminum. The aluminum used in the reflector (3) structure that is the subject matter of the invention is 99.99% pure and the lighting efficiency factor was found to be 91%. This factor is calculated by the ratio of the light flux to power. Light flux can also be referred to as the amount of light emitted by a light and scattered in all directions in space.

In sum, the reflecting body is made of a metal, preferably aluminum. The purity grade of the aluminum used is over 99%, preferably 99.9%.

Lighting armatures that include a reflector (3) in accordance with the descriptions provided above is within the scope of the invention.

When the reflection data obtained from experiments and the uniqueness of the material used in the structure of the reflector (3) is considered along with the configuration of the reflecting surface of the reflector (3), it is clear that the subject matter of the invention is an improvement over the state of the art.

Description of Drawing

Figure 1 View of the reflector as it is mounted on the armature structure

Figure 2 Upper view of the reflector

Figure 3 Side view of the reflector

Figure 4 Oblique view of the reflector

References

1. Ballast box

2. Light source

3. Reflector

4. External case

5. Base segment

6. Side segment

7. Mounting wing

8. Peak section

9. Skirt

Claims

A reflector (3) for lighting armatures, characterized in that it contains a reflecting body that is configured as a rotating paraboloid form such that it contains;

- a polygonal peak section (8) to attach a light source (2) and base segments (5) that are composed of a preferably polygonal skirt (9) which provides an opening through which emitted light can be scattered,

- an inner region to accommodate the light source (2),

- radial side segments (6) that are composed of reflecting surface units around an axis extending from the peak section (8) to the skirt (9) portion.
The reflector (3) according to Claim 1, characterized in that the reflecting body is comprised of polygonal base segments (5) that are laid out concentrically, one after the other, such that their external circles would form a rotating paraboloid.
The reflector (3) according to Claim 1, characterized in that the reflecting body is symmetrical with respect to the axis.
The reflector (3) according to Claim 1, characterized in that reflecting surface units are of preferably isosceles trapezoid form.
The reflector (3) according to Claim 1, characterized in that the base segments (5) are preferably of isosceles polygonal form.
The reflector (3) according to Claim 1, characterized in that the base segments (5) are configured such that their diameters would increase, moving from the peak section (8) towards the skirt (9).
The reflector (3) according to Claim 1, characterized in that the number of side segments (6) is preferably between 12 and 160.
The reflector (3) according to Claim 1, characterized in that the width of the reflecting body is preferably 100mm - 420mm.
The reflector (3) according to Claim 1, characterized in that height of the reflecting body is preferably 100mm - 450mm.
The reflector (3) according to Claim 1, characterized in that base segments (5) are preferably of polygon shape having 3 to 16 sides.
The reflector (3) according to Claim 1, characterized in that the width of the edges that forms the reflecting surfaces are preferably between 5mm and 80mm.
The reflector (3) according to Claim 1, characterized in that reflecting surface units or side segments (6) have flat surfaces, concave surfaces, or convex surfaces.
The reflector (3) according to Claims 1 to 12, characterized in that the reflecting body is made of a metal, preferably pure aluminum.
The reflector (3) according to Claim 13, characterized in that the reflecting body is made of an aluminum with a degree of purity at least 99%, preferably 99.9%.
The reflector (3) according to Claims 1 and 14, characterized in that, in order to be integrated to the lighting device, it includes an assembly wing (7) at its skirt (9) section.
A lighting armature that contains a reflector (3) in accordance with any one of the above claims.
The lighting armature according to Claim 16, characterized in that it contains, a metal preferably aluminum external case (4) surrounding the reflector (3), a ballast box (1) and a light source (2).