Ceiling fluorescent parabolic luminaire

The invention relates to the field of electricity, namely luminaires with luminescent tubes for ceilings.

The ceiling type illuminators [1 .. .4] are known with parabolic networks in the form of blinds, which include a metal body, in which all the necessary electrical elements are mounted; diffuse or catoptric parabolic reflector grid - concentrates and focuses the light, being also located in the body of the illuminator. The reflecting grid consists of a network of parabolic blinds, being made of separate elements of different shapes, which are interconnected to form a uniform cellular network. Parabolic blinds, installed in known ceiling type luminaires, consist predominantly (90%) of a thin aluminum plate with at least о diffuse reflecting surface.

The bodies of the known luminescent luminaires are made entirely of metal plates, which by means of suitable mechanical methods of processing give them a desirable shape. The luminaire bodies made in the form of a box have a depth of about 10 cm, the upper part of which is open; the shape of this box or its top aspect is either a perfect square, or a rectangular parallelogram, the minimum dimensions of which are 10x60 cm and maximum 62x160 cm. The creation of a box with such dimensions, especially of the four parts, is carried out in different stages of modeling. This process is costly and, respectively, increases the final cost of the parabolic ceiling type illuminator. One of the stages of modeling, used by most manufacturers and which considerably increases the cost and time of realization, is welding or joining with rivets the flanks on all four edges of the square or rectangular box. At the same time, the use of the metal plate for making the body gives the finished product an excessive weight, which presents an additional load for the decorative ceilings. It also becomes difficult to manipulate in the production and installation process.

The lattice grating of the parabolic reflectors of the luminescent luminaires of the ceiling type represents a network of elements of different dimensions, mostly constructed of a thin aluminum plate with at least a op or a diffuse surface. This lattice grid consists of a square or rectangular frame, formed by four linear elements, joined to each other at four angles. The main parabolic elements, which reflect and focus the light, are commensurate with the number of tubes in the luminaire and are fixed in two opposite parts and inside the frame. The elements of the parabolic and non-parabolic transverse blades are placed on two other parts of the frame and vertically directed towards the main parabolic components, thus creating the reflecting grid. This grid, in addition to the concentration and focus of the light, hides the luminescent tubes of the luminaire for the observer looking at the luminaire from a certain angle. The size of the angle at which the luminescent tubes are not visible depends on the quality of the blinds, becoming one of the main characteristics, according to which it is possible to differentiate between the parabolic luminescent luminaires of the ceiling type from any other and falling into two different categories.

In all ceiling-mounted parabolic luminaires to replace the lamp or starter, it is necessary to remove the blinds made from the cross-beams described above in order to gain access to the tubes and starters. To make it possible to dismantle the reflector grille (blinds), without locking with the luminescent tubes attached to the luminaire, the transverse blades along the entire length are provided with holes. This means that they are located exactly under the luminescent tubes to avoid the obstacle presented by the installed tubes, the reflector grid being dismantled. As a consequence, beneath the luminescent tubes is missing the reflective parabolic surface, at the same time part of the light flux, which diffuses unevenly from the bottom of the tubes, is directed to the flat surface of the metal support of the luminaire and to the floor, so it is not concentrated and not it focuses in the right way. This disadvantage can be eliminated by placing a parabolic reflector beneath the luminescent tubes, along their entire length. The sectors of the metal body that are not covered by the reflecting grid serve as light reflecting surfaces; Because they are in the field of view of the observer, the manufacturers are required to completely paint the body in white, consisting of a metal plate and which serves as a support for the electrical elements, which increases the costs of producing this illuminator.

The problem that can be solved by the present invention is to eliminate the disadvantage mentioned above by creating a luminescent parabolic luminaire for the ceiling, which includes a body (1), some electrical elements located in it and a parabolic reflector system (2,3) with surface catoptric or diffuse to focus the light emitted by the luminescent tubes (4). Two lateral body parts (1), in which the electrical elements are mounted, contain plastic parts (6), which are fixed on the main support (5) of the body, which is executed from a metal sheet, by pressing. At the same time, in the lateral parts of the plastic parts (6) of the body (1) there are executed recesses and projections (9, 10) in which the parabolic reflector system (2,3) is installed, which is removable and which contains the main parabolic components. (2), which focus the light flux, and which are located in

MD 2505 B2 2004.07.31 direct proximity to the base of the body (1) under the luminescent tubes (4), and the reticular grid (3), located above the main parabolic components (2) and under the luminescent tubes (4). The reticular grid (3) and the main parabolic components (2) of the removable system are located in the body (1) independently of each other.

For the construction of the body of parabolic luminescent luminaires for decorative ceilings, plastic table pieces are used. These two pieces of plastic table are fixed by the body made of a metal plate with о butter, and not by welding or joining with rivets. Thus, the metal part of the square or rectangular luminaire body includes only two of the four side walls! his.

The fact that two of the four side walls of the luminaire body are not initially mounted, facilitates its configuration for the mechanical connection of the body with three edges, located on the bottom from one end to the other. О such jointing allows to reduce the thickness of the metal plate used to make the body from 0.6 mm to 0.4 mm The flexibility of the plastic material, of which two body walls are made, facilitates and improves their connection by joining the metal part of the body. body. On the other hand, the stamping of metallic details presents some difficulties.

At the same time, the execution of the plastic table pieces with cavities and projections of special shapes makes it possible to install the lattice grid of the parabolic reflectors directly on the side walls, avoiding the use of other additional parts.

The use of a removable reelector grille increases the efficiency of the ceiling-mounted parabolic luminescent luminaire. Such constructs make the parabolic elements that concentrate and focus the light become completely independent of the top of the lattice grid. The main parabolic elements are located under the luminescent tubes having the ideal (curved) parabolic shape for intensifying the light flux. Thanks to these parabolic elements under the tubes there are no holes. If it is necessary to replace the tubes or starters, only the upper part of the reelector grid is required to be dismantled. In the lower part, independent of the upper one, the main parabolic elements remain untouched, at the same time they do not prevent the disassembly or installation of luminescent tubes or luminaire starters.

The elements of the removable lattice grid are made by the thermochemical treatment of the Special thermoplastic film with at least о re-surface, catoptric or diffuse surface. In order to obtain a thin thermoplastic film with at least о reelector surface о very thin membrane (approx. 0.015 mm), it joins with о surface having the highest degree of reflection on a layer of material of greater thickness, the thickness of which is about 0, 10 ... 0.40 mm, such as, for example, polyethylene, polypropylene, paperweight, polyvinyl chloride, etc.

The reduction of the thickness of the metal plate used for the construction of the luminaire body, as well as the use of the thermoplastic material for two side walls, reduces by 20 ... 35% the total weight of the luminaire body, compared to the known luminaire bodies of the ceiling type. At the same time, the ceiling is characterized by the simplicity of handling in the production and installation process.

The thermoplastic material of the reelector lattice grille eliminates the risk of trauma by cutting with sharp edges for people who install the luminaires. In addition, the flexibility of the plastic material gives it durability, excluding the possibility of mechanical pressure in the installation process.

Finally, the lack of holes in the sections of the main elements of the removable lattice, which are located directly under the luminescent tubes, allows the use of unpainted galvanized iron plate, as it is completely covered by the parabolic re-surface surfaces. The use of galvanized iron plate excludes the costs for further painting of the luminaire body, at the same time о such plate is more resistant to corrosion, compared to о ordinary tier plate, painted black.

The present invention allows to reduce the production costs of the body for the elements of the parabolic luminescent luminaires of the ceiling type due to the use of the thermoplastic elements. Thermoplastic parts are mounted by stamping on the body of a metal plate, a process much cheaper than welding or long-lasting riveting, used for all parts of the body if they are made of metal.

Thanks to the use of two additional pieces of plastic table, the thickness of the steel plate is reduced by 40%, which significantly reduces the costs for the construction of the body.

The present invention contributes to the increase of the lighting efficiency of the luminaires thanks to the use of the removable lattice grating, which allows the use of parabolic elements that reflect and direct the light flow. In such a construction, the top of the removable lattice grille serves, in particular, as a protective cover for luminescent tubes, covering them from a certain angle. If the tubes or starter are replaced, only the upper part of the removable lattice grille is disassembled.

The main parabolic elements are located under the luminescent tubes and their parabolic (curved) shape encompasses all the lower part of the tubes, without leaving the holes along the lower part of the luminaires, as in the case of known luminaires, where disassembly is required.

MD 2505 B2 2004.07.31 to the unified lattice reflectors. The fact that there are no such holes in the body of the main parabolic elements, but it is о reflective surface under the luminescent tubes along their entire length, leads to the retention of the re-lighted light, focusing and focusing it directly in the desirable direction. Reducing the thickness of the plate from which the luminaire body is made, the use of two pieces of plastic table and a thin thermoplastic film with at least о reflecting surface to create the reflector network leads to a significant reduction in the weight of the final product - the parabolic ceiling-type illuminator. Consequently, the process of producing, installing and operating the luminaire is simple. In addition, thanks to the simplified construction, the luminaire can be installed on decorative ceilings.

The invention is explained by the drawings in fig. 1 ... 5, which represents:

FIG. 1, the overview of the parabolic fluorescent illuminator of the ceiling type with axial connection with different component parts thereof;

FIG. 2, the elements of the parabolic fluorescent illuminator of the ceiling type that axially join;

FIG. 3, the cross-section of the ceiling type parabolic illuminator;

FIG. 4, the plastic table parts for supporting the removable reflector grille;

FIG. 5, the plastic table parts for supporting the upper part of the removable reflecting grid.

The luminescent parabolic luminaire for the ceiling, according to the invention, contains a body 1 for electrical elements and a parabolic reflector system 2, 3 for concentrating and focusing the light flux emitted by the luminescent tubes 4. The body 1 for the electrical elements consists of a main support 5, made of a metal plate and two pieces of plastic table 6, which are mounted in the body by the ordinary stamping of the metal elements of the main support 5, this process being accomplished in a longer time. short, for example, with the duration of welding or jointing by rivets, which, if all four parts of body 1 were made of metal, would need to be made in all four angles of the box.

Due to the use of the plastic parts 6 in the body 1, the main support 5 of the initial metal plate is not modified on both sides 7. Thus, it is possible to fortify the base of the support 5 of the body 1 with the ribs 8 and to configure it according to a certain shape. а along the support 5 from one end to the other.

The parabolic reflector system 2, 3, according to the present invention, is removable and consists of the main parabolic components 2, which reflect and direct the light flow and which are located on the plastic table pieces 6 of the body 1 thanks to the special construction elements 9 executed on the entire surface of the illuminator, and of the lattice grid 3 located above the main parabolic components 2, which, on the one hand, helps the parabolic elements 2 to direct the flow of light, while, on the other hand, it is used to create a pleasant exterior appearance with the formation of multiple reflecting levels, which simultaneously conceal the luminescent tubes 4, located in the illuminator. The reticular grid of the parabolic reflector system 2, 3 through the recesses and projections 9, 10 is mounted on the plastic table pieces 6.

The division of the reflector system into two parts allows to dismantle the upper part 3 independently of the parabolic components fixed securely 2, located in the lower part of the illuminator. If it is necessary to replace the tubes or starters in the luminaire, only the upper part 3 of the reflector system 2, 3 is disassembled, without affecting the main parabolic components 2. Thus, the main parabolic components 2, according to the present invention, are located underneath tubes along their entire length and are not slotted, having at the same time an ideal parabolic shape, thanks to which a directed light flux is created, improving the efficiency of the illuminator.

Both parts of the parabolic reflector system 2, 3, according to the present invention, constitute a composition of elements of different shapes, made by thermomechanical modeling of a thin thermoplastic film with at least о reflecting surface. Due to the specific low weight of the thermoplastic film, compared to the aluminum one, the total weight of the demountable grid 3 is reduced by 50%. The small weight in combination with the plastic properties of the material reduces the risk of trauma, which could be caused by the sharp edges, during the installation of the luminaire, and the flexibility of the plastic material gives it durability, excluding the possibility of mechanical pressure during the installation.

MD 2505 B2 2004.07.31 (57) Claims:

1. Luminescent parabolic luminaire for the ceiling, which includes a body (1), some electrical elements located in it and a parabolic reflector system (2,3) with a catoptric or diffused surface for focusing the light emitted by the luminescent tubes (4), characterized by that two sides of the body (1), in which the electrical elements are mounted, contain plastic parts (6), fixed on the main support (5) of the body, which is made of a metal sheet, by pressing, also in the lateral parts of the plastic parts (6) of the body (1) there are executed recesses and projections (9, 10) in which the parabolic reflector system (2,3) is installed, which is removable and which confines the components main parabolics (2), which focus the light flux, and which are located directly near the base of the body (1) under the luminescent tubes (4), and the lattice grid (3), placed above the main parabolic components (2) and under the luminescent tubes (4), at the same time the reticular grid (3) and the main parabolic components (2) of the removable system are located in the body (1) independently of each other.

2. The luminescent parabolic luminaire for the ceiling, according to claim 1, characterized in that the main parabolic components are integrally executed and determine the focus of the light in the given direction.

3. Luminescent parabolic luminaire for the ceiling, according to claim 1, characterized in that two lateral parts of the main support (5) are made of a metal plate of reduced thickness with the possibility of molding the body (1) by means of elongation ribs (7), executed at the base of the support (5), along its lateral parts.

4. The luminescent parabolic luminaire for the ceiling, according to claim 1, characterized in that the components of the parabolic reflector system (2,3) are made of thermoplastic film with at least one reflecting surface - catoptric or diffused.

5. Luminescent parabolic luminaire for the ceiling, according to claim 1, characterized in that the properties of the thermoplastic film, from which the parabolic reflector system (2,3) is made, ensures the durability, flexibility and reduction of the risk of trauma.

6. Luminescent parabolic luminaire for the ceiling, according to claims 4-5, characterized in that the components of the parabolic reflector system (2,3) are executed by pressing from thermoplastic film.

7. The luminescent parabolic luminaire for the ceiling according to claim 1, characterized in that the main support (5) of the body (1) is completely covered by the components of the parabolic reflector system (2,3).

(56) Bibliographic references:

LUS 6092913 A 2000.07.26

2. US 5207504 TO 1993.05.04

3. US 3089023 TO 1963.05.07

4. FR 1534367 TO 1968.07.26

<td>Chief Secfie:</td><td>INCLUDED Natalia</td>

<td>Examiner:</td><td>Cojocaru</td>

<td>Editor:</td><td>LOZOVANU Maria</td>

State Agenda for Industrial Property Protection str. Andrei Doga, no. 24, block 1, MD-2024, Chisinau, Republic of Moldova

MD 2505 B2 2004.07.31