RU2245488C1 - Combined searchlight - Google Patents

Abstract

FIELD: light signaling systems for airfields, ships, architectural lighting.

SUBSTANCE: proposed searchlight designed for searching and viewing remote objects has housing with outlet aperture closed with safety-glass or light-filter frame that accommodates parabolic mirror reflector with axial blind hole receiving axially mounted lamp with lamp holder disposed in reflector focus, as well as means for feeding current to power supply or to supply mains converter. Light-emitting extension diode unit made in the form of printed-circuit board mounting light-emitting diodes whose axes are parallel to optical axis of searchlight is installed in vicinity of outlet aperture and blind hole on optical axis of searchlight axially relative to lamp. Converter board is disposed in flat-bottom cylindrical sleeve made of conducting material whose outer surface mounts light-emitting diodes functioning as radiator.

EFFECT: enhanced efficiency, effective range, radiating and thermal characteristics, enlarged functional capabilities of searchlight.

12 cl, 5 dwg

Description

The present invention relates to lighting engineering, in particular, to search and lighting projectors mainly with a narrow beam of visible or IR radiation, in which halogen or traditional incandescent or short-arc xenon discharge lamps are used as light sources.

Such devices are designed to search for and monitor remote objects that are operated on special vehicles. Searchlights can be used in light-signal complexes of airfields, heliports or on ships, as well as in architectural lighting.

A searchlight device [1] is known with a LED lamp used as a traffic light, comprising a mirror paraboloid reflector with an axial “blind” hole, in which an LED lamp is axially mounted on the optical axis in the form of a spherical mounting element, the luminous body of which is located in the light center reflector.

The disadvantages of the analogue are associated with poor lighting characteristics of the device, the inability to obtain narrow beams of radiation due to the increased dimensions of the luminous body of the lamp (~ 80-100 mm) and, as a result, the location of the LEDs outside the focus of the reflector.

Known floodlight [2], containing a housing covered with a protective glass or IR filter, a paraboloidal reflector, in the axial "blind" hole of which is axially mounted a cartridge with an incandescent lamp, the luminous body of which is located in the focus of the reflector.

The disadvantages of the prototype are due to the low efficiency of the searchlight due to the large losses in the IR filter, and therefore, the low range of detection and observation of objects, as well as the difficulties of operational switching during operation from infrared radiation to visible light (this is possible only when replacing the IR filter with transparent protective glass).

The aim of the invention is to increase the efficiency and range of the searchlight, improve its radiative and thermophysical characteristics, expand the functionality.

This goal is achieved by the fact that in a combined searchlight containing an enclosed frame with a protective glass or a filter filter outlet, a paraboloidal reflector with an axial "blind" hole, in which a cartridge with a lamp is installed axially along the optical axis of the searchlight, the luminous body of which is located in the focus of the reflector, and the means of current supply to the power source or the converter of the power supply network, in the zone of the output of the "blind" hole on the optical axis of the searchlight axially mounted with a lamp LED block nozzle made in the form of a board with LEDs whose optical axes are parallel to the optical axis of the spotlight.

This goal is also achieved by the fact that the LEDs of the nozzle block are mounted on a flat radiator made of heat-conducting material with holes for placement of cambric insulated LED leads, the ends of which are mounted and soldered on an electrically insulating, for example, printed circuit board parallel to the radiator, connected to current-carrying means or power supply converter.

The goal is also achieved by the fact that the radiator of the heat-conducting material is made in the form of a cylindrical cup with a flat bottom, inside of which a printed circuit board is mounted with the ends of the leads of the LEDs and current supply means soldered on it, and the said cup with its open part is coaxially mounted inside another, outer cylindrical cup, acting as the body of the nozzle block.

The goal is achieved by the fact that inside the cylindrical cup-radiator on the back side of the printed circuit board with the ends of the leads of the LEDs soldered on it, the elements of the power supply converter with the means of current supply to the LEDs are assembled.

The problem is also solved by the fact that the open part of the cylindrical cup with the printed circuit board installed in it, the elements of the power supply converter and the means of current supply to the LEDs are filled with an insulating compound, for example, a ceramic-polymer heat-conducting dielectric compound.

The technical result is achieved by the fact that the outer cylindrical cup-case of the nozzle block is made of heat-conducting material with finned outer walls and is in thermal contact with the inner cup-radiator due to the sliding fit of their side walls.

Achieving the goal is also facilitated by the fact that the outer cylindrical glass-case of the nozzle block is hermetically sealed with a protective glass and installed outside the spotlight case, adjoins through the heat-insulating gasket to the outer surface of the protective glass or filter and is mechanically held by stretch marks on the frame.

The problem is solved by the fact that the outer cylindrical glass-case of the nozzle block is covered by a flat optical element consisting of optical cells having the same Fresnel disk lenses with a direct carrier layer, the optical axis of the lenses coinciding with the optical axis of the LEDs, and the luminous centers of the LEDs are located in focus of each lens.

Achieving the goal is also facilitated by the fact that the LED block nozzle is installed inside the spotlight housing and is mechanically held by the brackets on the lamp holder or by braces on the side walls of the housing.

Another means of achieving the goal is that along the perimeter of the outlet of the reflector or on the frame with a protective glass or filter, an additional ring LED block is installed, assembled on a ring printed circuit board with a radiator that is in thermal contact with the walls of the spotlight housing.

The task is also facilitated by the fact that the main LED block-nozzle and the additional ring LED block are assembled on LEDs with an IR spectrum or a visible emission spectrum in the passband of the radiation by an IR filter or a protective glass.

Achieving the goal is also facilitated by the fact that the main LED block-nozzle and the additional ring LED block are connected to a power source or a converter of the mains supply, irrespective of similar means for a spotlight, with the ability to switch the spotlight from infrared to visible light and vice versa.

Preferred embodiments of the combined searchlight according to the invention are shown in the drawings.

Figure 1 Combined floodlight with a discharge lamp and LED block nozzle mounted outside the housing of the spotlight. Side view, partially in section.

Figure 2. The same as in figure 1, front view.

Figure 3. Combined floodlight with a halogen incandescent lamp, LED nozzle block and ring block mounted inside the spotlight housing. Side view, partially in section.

Figure 4. LED block attachment with a flat optical element with Fresnel disk lenses. Sectional side view.

Figure 5. The block diagram of the inclusion of a combined searchlight with the ability to change the type of radiation.

Shown in figures 1, 2, 3, 4 and 5, the variants of the combined searchlight are made in the housing 1, the outlet of which is blocked by a frame 2 with a protective glass or light filter 3 (mainly an IR filter). A paraboloidal reflector 4 with an axial “blind” hole 5 is installed in the housing 1, in which a cartridge 6 is installed axially along the optical axis of the searchlight with a short-arc gas-discharge xenon lamp 7 (Fig. 1), also held by a live rod 8 connected to the cartridge 6 The luminous body of the lamp 7 is located in the focus F of the reflector 4, providing the formation of a narrow beam of radiation (~ I ÷ 2 °) of the spotlight in the visible or infrared region of the spectrum, depending on the use of a protective glass or light filter 3.

In the back of the housing 1 is placed ballasts for a gas discharge lamp 7, including a power supply converter 9 with an ignition device, connected by means of a current supply (not shown) to a primary power source, for example, to a direct current generator (see Fig. 5).

In the zone of the exit of the “blind” hole (shown by the dotted line in FIG. 1), an LED block nozzle 10 is mounted axially with the lamp 7 on the optical axis of the spotlight 10. The cross section of the block nozzle 10 does not exceed the size of the “blind” hole of the reflector 4 of the searchlight.

The specified block nozzle 10 is made in the form of a board 11 with LEDs 12, installed bottom in thermal contact on a flat radiator 13 of heat-conducting material, mainly based on aluminum alloys, so that the insulated terminals 14 of the LEDs 12 (see figure 4) are located in the holes made in the flat radiator 13, and the optical axis 0 ^I 0 ^{I of the} LEDs are parallel to the optical axis of the spotlight 00.

The ends of the terminals 14 of the LEDs 12 are mounted and soldered onto an electrically insulating, for example, printed circuit board 11 parallel to a relatively flat radiator 13, connected to a current supply means or to a power supply converter 15. The Converter 15 can be moved to the back of the housing 1.

The LEDs 12 are connected to each other in series or in parallel-parallel chains with individual shunting (LEDs or chains) by zener diodes (not shown) to ensure the operation of the nozzle block 10 in the event of the failure of one or more LEDs, thereby increasing the reliability of the system.

The radiator 13 of the LED unit-nozzle 10 is a flat bottom of the cylindrical cup 16. On the outer surface of the flat bottom of the cup, the LEDs 12 are in thermal contact with it. In this case, the printed circuit board 11 with the ends of the leads 14 of the LEDs 12 and the current supply means soldered on it is mounted inside the cup 16 .

The said glass 16, with its open part, is coaxially mounted inside another, external cylindrical glass, which simultaneously performs the functions of the housing 17 of the nozzle block 10.

Inside the cylindrical cup (16) - radiator 13 on the back side of the printed circuit board 11 with the ends of the terminals 14 of the LEDs soldered on it, elements 18 (see Figs. 3, 4) of the power supply converter with current supply means to the LEDs 19 can be assembled. part of the cylindrical glass 16 with the above-mentioned transducer elements and means of current supply installed therein can be filled with an insulating compound, for example, a ceramic-polymer heat-conducting dielectric compound 20, providing over monthly electrical insulation of soldering units, mechanical strength and effective conductive heat transfer to the housing 17 of the nozzle block 21.

An outer cylindrical cup-case 17 made of heat-conducting material made of a nozzle block 10 (Figs. 1, 2) or 21 (Figs. 3, 4) has fins 22 of the outer walls and is in thermal contact with the inner cup 16 of the radiator 13 due to the sliding fit their side walls.

The outer cylindrical cup-case 17 of the nozzle block 10 (Fig. 1) is hermetically closed by a protective glass 23 held on the end part of the cup 17 by a union nut.

In the first embodiment of the searchlight, a sealed LED block 10 is installed outside the housing 1 of the searchlight, adjoins through the heat-insulating, for example, asbestos gasket 24 to the outer surface of the protective glass or filter 3, and is mechanically held by braces 25 on the frame 2.

The second embodiment of the searchlight provides for the overlapping of the outer cylindrical cup-housing 17 of the nozzle block 21 (FIGS. 3 and 4) with a flat optical element 26 having the same Fresnel disk lenses 27 (see FIG. 4) with a direct carrier layer.

The optical axis 0 ^I 0 ^{I of the} lenses, the number of which corresponds to the number of LEDs 19 installed in the landing block, coincides with the optical axes of these LEDs, and the luminous centers of these LEDs are located in the focus I of each lens (Fig. 4). The path of the rays of the nozzle block 21 with Fresnel disk lenses is shown by arrows (FIGS. 3 and 4).

The LED block nozzle 21 is mounted inside the spotlight housing and is mechanically held by brackets 327 on the bulb holder 28 of the lamp 29 or by extensions (not shown) on the side walls of the housing, similar to the first embodiment of the nozzle block 10.

Means of current supply to the LEDs or to the converter of the nozzle block 10 or 21 are placed on braces 25 (FIG. 2) or brackets 27 (FIG. 3).

Another embodiment of the combined searchlight (Fig. 3) provides for the installation on the perimeter of the outlet of the reflector 30 or on the frame (not shown in Fig.) With a protective glass or a filter of an additional ring LED block 31 assembled on a ring printed circuit board 32 with a radiator 33, in thermal contact with the walls 34 of the housing of the searchlight. The LEDs 35 of the annular block 31 are selected with a scattering angle of 4-8 ° less than the scattering angle of the LEDs 19 (see the ray path in FIG. 3) and are installed with optical axes 0 ^II 0 ^II parallel to the optical axis of the spotlight 00. In this case, overlays are ensured light intensity curves of the central LED block 21 and the ring LED block 31 with approximately the same scattering angles close to the scattering angle of the radiation beam generated and generated by the lamp 29 and the reflector 30 of the searchlight.

The central LED block-nozzle 10 (Fig. 1) or 21 (Figs. 3, 4) and an additional annular LED block 31 are assembled on the LEDs of the IR spectrum (mainly near IR) or the visible radiation spectrum. For architectural lighting, these LED blocks can be assembled on red, blue, yellow or green LEDs.

The LED block unit 10 or 21 and the additional ring LED unit 31 may have a radiation spectrum corresponding to the passband of the protective glass or filter 3, for example, visible or IR radiation, respectively. In this case, a substantial increase in the axial luminous intensity of the combined searchlight is provided.

The central LED block nozzle 10 or 21 and an additional annular LED block 31 (Fig. 3) are connected to a power source, regardless of similar means for the lamp 7 (Fig. 1) or 29 (Fig. 3) of a searchlight with the ability to switch from infrared radiation visible light and vice versa using the radiation control unit (see figure 5). This is achieved by the fact that the LEDs 12 (Fig. 1), 19 and / or 35 (Fig. 3) in the nozzle block 10 and 21, as well as in the ring LED block 31, have a radiation spectrum that does not coincide with the transmission spectrum of the protective glass or IR Filter 3.

For example, if the outlet of the searchlight is blocked by an IR filter 3, then the block nozzle 10 is made on the LEDs 12 of the visible radiation spectrum and can be turned on for operation by the radiation control unit regardless of whether the lamp 7 is turned on or when it fails. In this case, the combined searchlight will operate in the visible range of the spectrum. When disconnecting the nozzle unit 10 from the power source with the lamp 7 turned on from the lamp power source or the power supply converter, the spotlight will operate in the infrared range.

In the reverse order, the spotlight functions (Fig. 3) with the nozzle block 19 and / or the LED ring block 35 when the outlet is blocked by the protective glass 3 and the nozzles are mounted on the LEDs of the IR radiation spectrum.

Thus, the combined searchlight with an IR filter 3 and embodiments of the central block nozzle 10 (FIG. 1) 21 and / or 31 (FIG. 3) on IR LEDs when connected to a lamp power source or to a power supply converter 36 and to the power source of the LED blocks 37, fed, for example, from the primary source of the power supply network 38 (see Fig. 5) provide at least 2-fold increase in radiation power and increase the range of the spotlight when using lamps with a power of 180-200 W and IR LEDs, for example, type U-162D (radiation power ~ 0.2 2 W / sr) or a module on U-200IK-3 type IR LEDs (radiation power ~ 30 W / sr) of OPTEL Scientific and Production Center.

The combined searchlight with a protective glass 3 and these nozzles when using the radiation control unit 39 (Fig. 5) allows you to quickly control the type of radiation, i.e. switch infrared radiation to visible light and vice versa, which expands the functionality of the spotlight.

The listed parameter improvements are also achieved through the organization of effective conductive heat transfer of LED blocks in the projector, i.e. improving its thermophysical characteristics.

Literature

1. Testimonial. on the floor. model. No. 11298, class F 21 K 7/00, publ. 09/16/99. Bull. No. 9.

2. Testimonial. on the floor. model. No. 22217, cl. F 21 K 7/00 from 09/12/01.

Claims (12)

1. A combined searchlight, comprising a housing with an overlapped frame with a protective glass or a filter filter outlet, assembled in it a paraboloidal reflector with an axial "blind" hole, in which a cartridge with a lamp is installed axially along the optical axis of the searchlight, the luminous body of which is located in the focus of the reflector , as well as means of current supply to a power source or a power supply converter, characterized in that in the area of the output and "blind" holes on the optical axis of the searchlight axially installed with a lamp detecting LED nozzle block formed as a board with LEDs, the optical axes are parallel to the optical axis of the spotlight. 2. The searchlight according to claim 1, characterized in that the LEDs of the nozzle block are mounted on a flat radiator made of heat-conducting material with holes for placement of cambric insulated LED leads, the ends of which are mounted and soldered on an insulating, parallel to the radiator, for example, printed circuit board with connection to means of current supply or to a power supply converter. 3. The searchlight of claim 2, characterized in that the radiator of the heat-conducting material is made in the form of a cylindrical cup with a flat bottom, inside of which is mounted a printed circuit board with the ends of the leads of the LEDs and current supply means soldered on it, and the said cup is coaxially mounted inside the other , an external cylindrical glass, which acts as the body of the nozzle block. 4. The searchlight according to claim 3, characterized in that inside the cylindrical cup-radiator on the back side of the printed circuit board with the ends of the LED leads soldered on it, the elements of the power supply converter are assembled with means for supplying current to the LEDs. 5. A searchlight according to any one of claims 3 and 4, characterized in that the open part of the cylindrical cup with a printed circuit board installed therein, elements of the power supply converter and means of current supply to the LEDs are filled with an electrical insulating compound, for example, a ceramic-polymer heat-conducting dielectric compound. 6. A searchlight according to any one of claims 3 to 5, characterized in that the outer cylindrical cup-body of the nozzle block is made of heat-conducting material with finned outer walls and is in thermal contact with the inner cup-radiator due to the sliding fit of their side walls. 7. The searchlight according to any one of claims 3 to 6, characterized in that the outer cylindrical cup-body of the nozzle block is hermetically sealed with a protective glass and installed outside the spotlight body, adjoins through the heat-insulating gasket to the outer surface of the protective glass or filter and is mechanically held by stretch marks on framed. 8. A searchlight according to any one of claims 3 to 6, characterized in that the outer cylindrical cup-housing of the nozzle block is covered by a flat optical element consisting of optical cells having the same Fresnel disk lenses with a direct carrier layer, the optical axis of the lenses coinciding with optical axes of the LEDs, and the luminous centers of the LEDs are located in the focus of each lens. 9. A searchlight according to any one of claims 3 to 6, 8, characterized in that the LED block nozzle is mounted inside the spotlight housing and is mechanically held by brackets on the lamp holder or by extensions on the side walls of the housing. 10. A searchlight according to any one of claims 1 to 9, characterized in that an additional annular LED block is mounted on the annular printed circuit board with a radiator in thermal contact with the walls of the housing along the perimeter of the outlet of the reflector or on the frame with a protective glass or filter. spotlights. 11. The searchlight according to claim 10, characterized in that the central LED block-nozzle and an additional ring LED block are assembled on LEDs with an IR spectrum or a visible radiation spectrum in the passband of the radiation by an IR filter or a protective glass. 12. A searchlight according to any one of paragraphs 10 and 11, characterized in that the central LED block-nozzle and an additional ring LED block are connected to a power source, regardless of the same means for the spotlight, with the ability to switch the spotlight from infrared to visible light and vice versa .

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