RU2462657C2 - Illumination device - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: illumination device has light sources in form of light-emitting diodes mounted on a heat-removing base and provided with separate reflectors. Each reflector has a shape similar to the shape of a tetrahedral frustum of a pyramid in whose smaller base a light-emitting diode is mounted. Each reflector is provided with mating elements in form of protrusions on two sides of the larger base of the pyramid and grooves reciprocating the protrusions, made on the other two sides, which enable 'dovetail' connection of the reflectors.

EFFECT: high manufacturability of the device, broader structural capabilities of forming a light spot of the illumination device.

9 cl, 7 dwg

Description

FIELD OF THE INVENTION

The invention relates to lighting engineering and can be used in the manufacture of various lamps for outdoor and indoor lighting, including industrial premises with an unfavorable explosive atmosphere.

State of the art

Known lighting device with a light source based on light-emitting diodes placed in individual reflectors made in the form of a thin-walled parabolic shell (see patent US 0303711, IPC F21V 29/00, F21S 8/00, publ. 10.12.2009 and patent RU 61388 U1 IPC F21V 13/00, published on February 27, 2007). The parabolic shape of the reflectors is most often used in lighting devices, however, the round shape of the outlet openings of the reflectors leads to low efficiency of using the area of the lamp. In addition, the above-mentioned fixtures are highly assembly-intensive due to the presence of a large number of single elements, between which it is necessary to maintain the installation dimensions. Therefore, more often they immediately form the entire set of reflectors in the form of a single panel, manufactured, for example, by stamping from a sheet blank.

Known lighting devices with a light source based on LEDs, equipped with individual reflectors, made in the form of recesses in a single reflective panel (see patent US 7303316, publ. 04.12.2007, and patent US 7497606, publ. 03.03.2009). Due to the fact that the recesses are made with partial overlap of each other, the entire panel works as a reflective surface, which ensures high efficiency of using the area of the lamp. Using a single reflector panel provides simplicity and ease of assembly of the lamp. The main disadvantage of these solutions is the need to develop individual technological equipment for each specific lamp, which significantly increases the cost of the latter.

A lighting device is known in which the modular principle of forming a reflecting surface based on the same typical individual reflectors made in the form of a hollow truncated tetrahedral pyramid is used (see patent US 7654691, IPC F21V29 / 00, F21V7 / 00, published 02.02.2010) . Pre-installation in the luminaire, the reflectors are assembled into linear modules, each of which is designed for a line of LEDs. The assembly of such a linear module is carried out by installing reflectors in a channel-shaped guide, providing a strict arrangement of the latter in a row and at a distance from each other, equal to the width of the jumper inserted in the guide between two adjacent reflectors. The number of such linear modules in one luminaire and their relative position on the heat sink base may be different.

The advantage of this solution is the ability to use standard parts of mass production, which reduces the cost of fixtures, and the possibility of forming a wide variety of designs based on the same type of modules. The use of guides ensures the simplicity and manufacturability of the assembly of the lamp, however, they significantly complicate its design and limit the possibility of forming a light surface.

As the closest, in the presence of similar structural features, analogue of the claimed solution, a lighting device is adopted that contains light sources in the form of LED emitters mounted on a heat sink base, equipped with individual reflectors, made in the form of a typical part having a shape close to the shape of a truncated pyramid , in the small base of which there is an LED emitter, and the large base of the pyramid is an outlet for the light beam (patent for utility model RU No. 91474, IPC F21V 7/00, H01L 33/00, publ. 02/10/2010). Reflectors are joined together by the sides of the large bases of the pyramids. Reflectors can be connected in any quantity and in any direction, which allows you to create a variety of fixtures using the same type of details. The rectangular shape of the reflectors and their connection with the lateral sides of the output rectangular openings provide maximum efficiency in using the surface area of the lamp.

The disadvantages of the known solution include the high complexity of the assembly, which is due to the need to fix each individual reflector to the radiator, as well as the limited design possibilities for forming a light spot due to the execution of the individual reflector in the form of a regular pyramid, based on a square.

Disclosure of invention

The task of the invention is to increase the manufacturability of the device, expanding the design capabilities of the formation of the light spot of the lighting device.

The problem is solved due to the fact that in the lighting device with a light source in the form of LED emitters mounted on a heat sink base, equipped with individual reflectors, each of which is made in a shape close to the shape of a truncated tetrahedral pyramid, in the small base of which there is an LED emitter, docked between themselves sides of the large bases of the pyramids, according to the claimed invention, each reflector is equipped with docking elements in the form of protrusions made on in the sides of the larger base of the pyramid, and in response to the protrusions of the grooves made on its other two sides, providing a connection of reflectors in the form of "dovetail".

The basis of the design of the lighting device, as in the prototype, is the principle of modular design, which allows on the basis of the same type of modules to create many designs of fixtures, different in shape and size.

Moreover, the above set of distinctive features of the proposed solution allowed us to obtain a new positive technical result, namely the possibility of forming from a single modules of the same type, which are individual reflectors, a single panel of reflectors, the latter being characterized by a sufficiently high strength and rigidity of the structure, regardless of the size and shape of this panels.

Thanks to the use of the “dovetail” connection, the said panel assembled from separate reflectors is a fairly strong, “one-piece” structure that can be moved, installed and fixed, i.e. use as a single unit (part), which greatly simplifies the assembly and installation of the lighting device. At the same time, the possibility of dismantling or reconstructing the luminaire remains: for example, by adding additional typical elements (modules), it is possible to increase the luminaire's power and change its configuration.

Thus, the reflector panel, on the one hand, can be used as a “single” unit (part), which ensures the convenience and simplicity of assembly of the lamp, and on the other hand, it is a modular assembly with all the attendant advantages.

The proposed design of the lighting device is characterized by simplicity of layout, it eliminates the need for any auxiliary parts, guides, etc., ensuring compliance with the installation dimensions, but complicating and weighting the design of the lamp.

Two protrusions and two reciprocal grooves are formed on each reflector, similar to the protrusions in shape and size. Thus, the total mass of the reflector practically does not change when connecting elements are introduced into its design and does not significantly affect the total mass of the luminaire.

Moreover, the protrusion / groove connection is quite strong and reliable, therefore, any other fasteners are also not needed. Reflectors are fixed in the housing due to the installation of an LED in it and can be additionally pressed against the housing with protective glass.

Due to the use of unified parts of the same type, ease of connection, cost-effective manufacturing, and the possibility of assembling a single reflector panel from single parts, which ensures ease of assembly, the claimed design of the lighting device is simple and high-tech.

Using the same type of complete base of single reflectors, many panels of various shapes and sizes can be compiled, which will create many fixtures of various shapes, sizes, power, etc.

Due to the fact that single reflectors have uniform sizes, it is quite easy for the designer to determine in advance the location of the LED emitters and other structural dimensions of the lamp.

A preferred embodiment of the claimed invention is the implementation of individual reflectors in the form of an irregular pyramid, which is based on a rectangle with unequal sides. In this case, the protrusions form on the two adjacent sides of the larger base of the pyramid, and the grooves form on the other two adjacent sides.

This embodiment of individual reflectors allows to significantly expand the design capabilities for the formation of the light spot of the lighting device due to the possibility of changing the lengths of the sides, the relative orientation of the reflectors and their layout in the lamp. The mentioned preferred solution will also reduce the number of individual reflectors per unit area of the lamp, which will further simplify the assembly of the device and increase its manufacturability.

The reflector may be provided with a flange made along the perimeter of the larger base of the pyramid. In this case, grooves and protrusions are formed in said flange.

To ensure uniform luminous flux and prevent glare of the device, it is preferable to perform the inner surface of the reflectors with corrugation.

To create sufficient heat dissipation in a luminaire operating on high-power LEDs, the housing is made with a developed external surface, formed, for example, in the form of cooling fins. Additionally, longitudinal and / or transverse corrugation can be performed on the outer surfaces of the housing.

LED emitters have a sufficiently long service life, and the largest number of LED lamp failures is associated with the failure of the service electronics. Therefore, to increase the longevity of the lamp and prevent the failure of all light sources at once, if there are more than five of them in one lighting device, it is advisable to combine LED emitters into several independent sections, each of which is equipped with its own power supply.

Power supplies and other electronic components can be placed in the recesses of the housing between the LED emitters.

The compartment of light sources from the side of the outlet openings of the reflectors is preferably closed with a protective glass pressed to the housing through the seal with levers.

Brief Description of the Drawings

The design of the lighting device is illustrated by drawings, where

figure 1 shows a lighting device, General view;

figure 2 is a view a from figure 1,

figure 3 is a view In from figure 2 with a partial section;

figure 4 - panel reflectors assembly;

figure 5 is a fragment of figure 4, enlarged,

6 and 7 show possible examples of forming a reflector panel.

The implementation of the invention

The lighting device (see Figs. 1-3) contains light sources in the form of LED emitters 1, each of which is placed on the optical axis at the focus of the individual reflector 2 and is fixed by means of a mounting plate 3 in the housing 4 made of an aluminum profile and hermetically sealed with the ends are molded by aluminum sidewalls 5. The compartment of the light source is closed by a protective glass 6, pressed against the housing 4 by means of levers 7 through a silicone sealant. In the recesses of the housing 4 between the LED assemblies are placed power supplies 8, LED drivers and other circuit elements. The entire outer surface of the housing 4 to improve heat dissipation is made with a fin 9.

The mass of such a case, which acts as a radiator, is calculated from the condition: at least 80 g per 1 W of LED power. In the given example of the luminaire, LED emitters with a power of 3 W each were used as light sources. The number of LEDs in one lighting device can be from one to 60 pieces. The luminaire shown in the drawings contains 20 LED emitters, grouped in four parallel rulers, five in each. Each such section (line) of LEDs is equipped with an independent power supply, which ensures the continued operation of the lamp as a whole when the electronics of one of these sections fail.

The reflector provides redistribution of the light flux emitted by the radiation source - an LED, and its concentration in the desired direction. Individual reflector 2 has a shape close to the shape of a hollow truncated pyramid, at the base of which lies a rectangle with unequal sides. Strict conformity of the shape of the reflector to the shape of the pyramid is not necessary, and most often the faces of the pyramid, they are the walls of the reflector, are slightly curved along the parabola at the small base, which improves the directivity of the light beam.

Each individual reflector 2 is equipped (see Figs. 4-5) with docking elements in the form of protrusions 10, made on two adjacent (large and small) sides of the larger base of the pyramid, and grooves 11, made on its two other adjacent sides. The protrusions 10 are made with the expansion from the base to the outer edge. The grooves 11 have a reciprocal protrusion 10 form. A flange 12 can be formed around the perimeter of the larger base of the reflector pyramid, in which protrusions 10 and grooves 11 are formed.

In the process of assembly of the lamp reflectors 2 are interconnected, forming a single panel of reflectors. The connection of the reflectors is as follows. The protrusion 10 of one reflector is engaged with the groove 11 of the other reflector, forming a dovetail joint 13. The expanding shape of the protrusions prevents separation of the reflectors. The connection of individual reflectors of the dovetail type is simple and reliable and allows you to create designs of arbitrary shapes and sizes, characterized by a sufficiently high strength and rigidity of the connection. A reflector panel is formed from single parts, which is further used: it is placed in the lamp, installed on the base and fixed as one part.

Figures 6 and 7 show examples of forming a reflector panel. The examples given illustrate only some of the design possibilities.

The reflector panel is formed in accordance with the given design of the lamp. The shape of the reflector panel determines the shape of the light spot of the lamp. The rectangular shape of the outlet of the reflectors 2 and the protrusions (and grooves, respectively) on the small and large adjacent sides of the rectangle provide the ability to create a large number of a wide variety of shapes.

To fix the device to the supporting structure or support, fasteners are provided on the rear surface of the housing 4. 14. The fastening of the lamp is not the subject of the applicant’s claims and can be performed in any known manner: on a conventional or swivel bracket, on a suspension bracket or on a vertical support.

The luminaire is powered by voltage through a flexible three-core cable, which is inserted through a special cable entry mounted in the housing on the side of the luminaire. Inside the case, the cable is connected to the power supplies using a terminal block, which is filled with a compound, which provides the necessary insulation.

From above, the luminaire can be covered with a protective grill.

Claims (9)

1. A lighting device with a light source in the form of LED emitters mounted on a heat sink base, equipped with individual reflectors, each of which is made in a shape close to the shape of a tetrahedral truncated pyramid, in the small base of which there is an LED emitter, while the reflectors are joined together by large sides the base of the pyramids, characterized in that each reflector is equipped with docking elements in the form of protrusions made on two sides of the larger base of the pyramid, response protrusions grooves formed on the other two sides thereof, providing a compound of reflectors of the type "dovetail". 2. The device according to claim 1, characterized in that the base of the reflector pyramid is made in the form of a non-equilateral rectangle, while the protrusions are formed on two adjacent sides of the larger base of the pyramid, and the grooves are formed on its two other adjacent sides. 3. The device according to claim 1 or 2, characterized in that the reflector is provided with a flange made around the perimeter of the larger base of the pyramid, while the grooves and protrusions are formed in the said flange. 4. The device according to claim 1, characterized in that the inner surface of the reflector is made with corrugation. 5. The device according to claim 1, characterized in that the LED emitters are mounted on aluminum circuit boards mounted on a radiator, the function of which is performed by the device body having ribbing of the outer surface. 6. The device according to claim 5, characterized in that the outer surface of the housing is made with corrugation. 7. The device according to claim 1, characterized in that the LED emitters are combined in sections, each of which is equipped with an independent power supply. 8. The device according to claim 1, characterized in that the power supplies and other electronic components are located in the recesses of the housing between the LED emitters. 9. The device according to claim 1, characterized in that the compartment of the light sources is closed by a protective glass pressed to the housing through the sealant using levers.

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