RU2401395C1 - Lamp with reflectors - Google Patents

Abstract

FIELD: illumination.

SUBSTANCE: lamp with reflectors comprises body with board, on which three rows of light diode lamps are installed, supply unit arranged in body, and having plates-reflectors with high reflecting property installed behind the first row at the angle of 60° to plane of board, behind the second row - at the angle of 45° to plane of board and behind the third row - at the angle 90° to plane of board.

EFFECT: improved efficiency of light flux application with simultaneous reduction of blinding effect.

3 cl, 1 dwg

Description

Technical field

The invention relates to lighting equipment, in particular to protected floodlights with adjustable light distribution, intended for lighting open spaces, access roads of vehicles, at airports, quarries, moorings, etc., as well as for lighting warehouse and other premises.

State of the art

According to ICAO requirements, airport lighting systems must not blind pilots. The corresponding floodlights of type SNA 745 from SIMENS or type RZ-30 K from IDMAN limit the blinding effect of the light flux on the pilots, however they use asymmetric parabolic cylindrical reflectors, which significantly increase the weight, dimensions and cost of the floodlights.

Known pendant lamp with a system of mirrors, some of which are fixedly mounted on the housing, and the other part is movable relative to the light source. The luminaire has a V-shaped counter-reflector, which changes the width of the dimming zone of the light source under the luminaire, while eliminating its blinding effect on people (A.S. USSR No. 956907, class F21V 7/12, 1982).

The disadvantages of the known device are the inability to eliminate the glare of peripheral rays, as well as the complexity of the design of the lamp.

A known searchlight for vehicles having a sealed enclosure with a protective glass and a composite reflector in the form of a paraboloid of revolution and a lamp located in the housing (German Patent No. 1216216, class F21M, 1966).

The disadvantages of the known device are due to the lack of means to reduce the glare of peripheral rays, low light distribution, the impossibility of using two extended light sources, and the complexity of the design of the mechanical drive inside the case.

As a prototype, a searchlight is selected that contains at least one discharge lamp with an extended luminous body mounted on the focal line of the concave reflector assembled in a sealed housing with a protective glass and an optical nozzle concave in a plane perpendicular to the focal line and mirrored from the inside, installed outside the casing and movable relative to the direction of lighting with mechanical locking on the casing (RU No. 2037084, M. class. F21S, 8/10, 1992).

The disadvantage of the prototype is the design complexity, not justified by the given specific installation conditions of the lamp, in which nozzles (reflectors) may be unregulated.

Disclosure of invention

The task of the invention is to eliminate the above disadvantages of analogues and prototype with the achievement of increased efficiency of use of the light flux while reducing glare.

The task is achieved in that the lamp contains three rows of LED lamps located on the board and has reflective plates with high reflectivity, installed behind the bottom row at an angle of 60 ° to the plane of the board, behind the middle row at an angle of 45 ° to the plane of the board and the last row - at an angle of 90 ° to the plane of the board.

The surface of the reflector plate is mirrored.

The width of the reflector plates of the first, second and third row is related to each other as d: (1.2-1.5) d: (2.0-2.5) d, where d is the diameter of the emitting surface of the LED.

Brief Description of the Drawings

The drawing shows a structural diagram of a luminaire comprising a housing 1 with a board 2, on which three rows of LEDs 3 are installed. The drawing shows three installation options for reflectors that are selected for the corresponding rows of LEDs from the condition of maximum illumination of the illuminated surface. When using option 1, part of the radiation is reflected in the area of the spot of illumination, and with a high-quality mirror coating of the reflector surface from the side of the light source, it will increase the illumination in the middle part of the spot by about 5-10%. Behind the first row of LEDs 3 at an angle of 60 ° to the plane of the board 2, a reflector plate 4 with high reflectivity from the side of the light source 3 and having a width equal to d is the diameter of the LED. For option 2, behind the corresponding row of LEDs 3 at an angle of 45 ° to the plane of the board 2, a reflector plate 5 with a width of (1.2-1.5) d is installed. For option 3, which is used only for the upper rows of LEDs, a reflector plate 6 with a width of (2.0-2.5) d is installed at an angle of 90 ° to the plane of the board 2, reflecting some part of the light flux from the side of the top into the area of the light spot number of LEDs. All the described options can be used together or separately, based on the optimal lighting conditions for the surface. Inside the housing 1 there is a power supply unit of 7 LEDs.

The surface of the reflector plates 4, 5 and 6 on the side of the LEDs is made with high reflectivity, achieved by painting, polishing, nickel plating or other equipment. The most effective is the mirrored surface of the reflector plates, reflecting at least 80% of the light flux of the light sources.

The implementation of the invention

The claimed lamp works as follows. The luminaire is switched on to the AC mains by introducing its pins into the connectors, followed by a 90 ° rotation of the luminaire to ensure electrical contact and fixing the luminaire in the operating position, in which the reflector plates 4, 5 and 6 direct the reflected light to the illuminated surface.

When applying to the light emitting diodes 3 on the circuit board 2 an electric current from the power supply unit 7 located in the housing 1, the light emitted by the LEDs is sent directly to the illuminated surface, and the reflection reflected by the reflector plates 4, 5 and 6 is directed to the same surface, providing interference of light waves, a decrease in the glare of light, which is achieved, in particular, by experimentally determined installation angles of reflector plates 4, 5, and 6.

The high efficiency of the luminous flux of the light sources 3 of the declared luminaire due to the interception of part of the luminous flux by reflector plates and redistribution in the required directions of light scattering allows increasing the axial light intensity of the luminaire directed to the illuminated surface by more than a quarter.

Claims (3)

1. A lamp with reflectors, comprising a housing with a board on which three rows of LED lamps are mounted, a power supply located in the housing, and having reflective plates with high reflectivity installed behind the first row at an angle of 60 ° to the plane of the board, behind the second nearby - at an angle of 45 ° to the plane of the board and behind the third row - at an angle of 90 ° to the plane of the board. 2. The lamp with reflectors according to claim 1, characterized in that the surface of the reflector plate from the side of the LED lamps is made mirrored. 3. The lamp with reflectors according to claim 1, characterized in that the width of the reflector plates of the first, second and third rows is related to each other, as d: (1.2-1.5) d: (2.0-2.5 ) d, where d is the diameter of the emitting surface of the LED lamp.