RU2669387C2 - Module of general purpose led light and multimodule floodlight - Google Patents

Abstract

FIELD: lighting engineering.SUBSTANCE: invention relates to lighting equipment and can be used in the manufacture of lighting equipment for architectural illumination of buildings, sports grounds, theatre auditoriums and concert halls, city squares, airports, railway facilities. Another result is the manufacturability and interchangeability of the LED modules. As an additional positive result, you can indicate the ease of assembly and maintenance of the LED spotlight. Module of the LED spotlight contains a heat-conducting body-radiator, the extruded profile of which is formed by an outer closed wall and an inner closed wall of the main chamber, connected by radial walls, together forming peripheral internal chambers, the walls of each of which form the through ventilation ducts of the body-radiator; a heat conducting plate, pressed by a lateral surface into the main chamber; a LED board mounted on the surface of said heat-conducting plate, with the possibility of heat exchange; optical system; rear end cap having through-slots, which are a continuation of the ventilation channels of the radiator housing. Multi-module floodlight contains two or more modules connected by a common shroud, the outer wall of the radiator housing of each module is provided with a longitudinal shaped groove, for example, a T-shape for locating a connector element for connecting an adjacent LED module with a gap sized by the length of the connector element.EFFECT: technical result of the claimed invention is to improve the thermal operation of the radiation sources by creating an effective cooling airflow.7 cl, 8 dwg

Description

Technical field

The invention relates to lighting engineering and can be used in the manufacture of lighting equipment for architectural lighting of buildings, sports grounds, theater and concert halls, city squares, airports, railway facilities.

State of the art

LEDs are an effective source of light, have a low power consumption and a long service life, are able to create high-intensity light fluxes sufficient for normal lighting of large areas from a considerable distance.

However, the use of high-power LEDs for these applications creates a problem with the dissipation of heat generated by the LEDs. In this case, the stability of the brightness of the LEDs significantly depends on the temperature of the LED crystal. The problem of creating thermodynamic equilibrium becomes more acute, the more powerful luminous flux must be obtained to create the required illumination. This problem becomes especially urgent when using LEDs in devices designed to create long-term operation.

The closest analogues of the claimed solution are known LED floodlights according to CN 201419366 U and KR 101152926 B1, a common disadvantage of which is the limited heat dissipation in case of using powerful radiation sources.

Both of these analogs have an extruded essentially cylindrical body-radiator, the profile of which is formed by an external closed wall and an internal closed wall of the main chamber, interconnected by radial walls, together forming peripheral internal chambers, a heat-conducting plate on which the LED board is mounted, and an optical the system. In this case, one of the end sides of the radiator case is completely covered by a heat-conducting plate with a board of light sources, and the second end side is with an end cap. Thus, heat exchange with the atmosphere occurs only from the surface of the outer wall of the radiator casing. Internal peripheral chambers do not have free communication with the atmosphere and do not participate in heat transfer. The thermal resistance of a closed air layer dramatically reduces the efficiency of removal of excess heat generated by working LEDs.

Known multi-module LED floodlight, containing many interconnected LED modules, each of which has an extruded, essentially cylindrical body-radiator, one of the end sides of which is completely covered by the LED board. As the opposite end of the body-radiator is made, the description of the known solution does not disclose. In this case, the radiator cases are attached to each other by a connecting plate using a threaded fastener and are combined by a metal band. The use of a threaded connection between the modules significantly increases the complexity of the assembly of the device (CN 201844236, MKI F21Y / 02, published May 25, 2011).

The technical result of the claimed invention is to improve the thermal regime of radiation sources by creating an effective cooling air stream. Another result is the manufacturability and interchangeability of LED modules. As an additional positive result, you can specify the ease of assembly and maintenance of the LED spotlight.

Disclosure of invention

The LED spotlight module is characterized by the following set of essential features:

An LED searchlight module comprising: a heat-conducting radiator case, the extruded profile of which is formed by an external closed wall and an internal closed wall of the main chamber, interconnected by radial walls, together forming peripheral internal chambers, the walls of each of which comprise through ventilation ducts of the radiator body; a heat-conducting plate pressed into the main chamber by a side surface; LED board mounted on the surface of said heat-conducting plate, with the possibility of heat exchange; an optical system comprising at least a cylindrical reflector mounted in the cavity of the main chamber of the radiator body; the rear end cover having through slots, which are a continuation of the ventilation channels of the radiator body.

The optical system of the LED spotlight module can have one or more lenses mounted in the cavity of the main camera of the radiator body with the possibility of converting the radiation of the LEDs.

At the output end of the radiator case, a protective nozzle can be placed, equipped with through slots, which are a continuation of the ventilation channels of the radiator case, which allows convection flows to freely move along the entire length of the module through the ventilation channels and outlet openings on the back cover and nozzle of the radiator case.

The specified nozzle may be equipped with optical elements that convert the luminous flux of the spotlight.

Optimally, the surface area S1 of the interface of the heat-conducting plate with the surface of the main chamber should be approximately equal to the surface area S2 of the surface of the heat-conducting plate to ensure minimum thermal resistance to heat transfer between the heat-conducting plate and the radiator body.

The casing-radiator of the LED spotlight module can be made of two or more parts mounted longitudinally and connected by means of a heat-conducting flange disk placed with the possibility of heat exchange between the connected parts of the casing-radiator and having through slots, which are a continuation of the ventilation ducts of both parts of the casing-radiator.

A multi-module LED floodlight is characterized by the following set of features:

A multi-module LED floodlight containing two or more LED modules attached to each other, each of which has an extruded radiator body, the profile of which is formed by an external closed wall and an internal closed wall of the main chamber, interconnected by radial walls, together forming peripheral internal chambers, the walls of which together make up the through ventilation ducts of the radiator case; a heat-conducting plate pressed into the main chamber by a side surface; LED board mounted on the surface of said heat-conducting plate, with the possibility of heat exchange; an optical system comprising at least a cylindrical reflector mounted in the cavity of the main chamber, while the outer wall of the radiator case of each module is provided with a longitudinal shaped groove, for example, a T-shape, to accommodate a connecting element designed to connect an adjacent LED module with a gap, the value of which is determined by the length of the connecting element.

A multi-module LED floodlight contains two or more modules connected to neighboring modules by one, or two, or three, or four connecting elements, depending on the availability of adjacent modules, and fastened by a common brace. This arrangement of LED spotlight modules allows you to assemble a multi-module LED spotlight of various configurations, depending on the lighting tasks.

In a preferred embodiment, the profile of the outer wall of the housing-radiator of the module is made in the form of a rectangle. Other profile shapes of the radiator case are possible, which allow compactly positioning the modules in the integrated assembly. However, in all cases when the radiator case is installed between the external and internal walls, through ventilation ducts should be located that do not have obstacles for convection flows. The profile of the inner closed wall may be similar to the profile of the outer wall. For example, an equilateral hexagon can also be used.

List of graphic materials

In FIG. 1 shows an embodiment of a preferred profile of a radiator case with one main inner chamber;

in FIG. 2 is a perspective view of a radiator case with a heat-conducting plate in a parsing;

in FIG. 3 - axial section of the module of the LED spotlight assembly;

FIG. 4 - volumetric image of the module of the LED spotlight in parsing;

in FIG. 5 is a three-dimensional image of the LED spotlight module with a two-part radiator housing in a parsing;

in FIG. 6 is an axial section of the LED spotlight module shown in FIG. 5 assembly;

in FIG. 7 is a perspective view of an assembly option of a multi-module LED floodlight.

in FIG. 8 is a connection diagram of a radiator housing using a connecting element.

The LED spotlight module contains a cylindrical body-radiator 1, the profile of which has an external closed wall 2, an internal closed wall 3 of the main chamber 4 and radial walls 5, together with walls 2 and 3 constitute peripheral internal chambers, the surface of which forms through ventilation ducts 6 of the housing- radiator 1; a heat-conducting plate 7, pressed into the side surface in the main chamber 4; a LED board 8 mounted on the surface of said heat-conducting plate 7, with the possibility of heat exchange; an optical system comprising at least a cylindrical reflector 9 mounted in the main camera 4 with the possibility of converting the radiation of the LEDs, a reflector 10, a front protective cover 11 and a rear protective cover 12 provided with through slots.

The radiator case, made of two parts 1.1 and 1.2, is connected coaxially using a heat-conducting flange disk 13, which is installed with the possibility of heat exchange between the connected parts 1.1 and 1.2 of the radiator case and has through slots, which are a continuation of the ventilation channels 6 of both parts of the radiator case. At the front end of part 1.2 of the casing-radiator, an additional heat-conducting plate 14 can be located, which makes it possible to intensify the heat removal process.

The back cover 12 of the radiator housing is provided with holes for accommodating current leads 15 and wires supplying LEDs.

The external profile wall of the housing-radiator 1 of the LED spotlight module has longitudinal T-grooves 16 for connecting adjacent modules for assembling a multi-module LED spotlight in order to obtain the required total luminous flux. One of the many possible options for a multi-module floodlight is shown in FIG. 7. It should be noted that the T-shape of the groove 16 is not only necessary for connecting the modules. A general mandatory requirement for the groove profile is that the groove profile and the profile of the connecting element 17 must provide the possibility of one-moving (spline) movement of the connecting element 17 relative to the housing-radiator of the searchlight module, or vice versa.

In addition to the function of holding adjacent modules, the connecting elements 17 regulate the value b of the gap between the modules, which forms the air channel for cooling the housing-radiator 1. For high-power flood LED floodlights, this is especially important.

Possibility of industrial application The variants of combinations of elements of an LED spotlight described in the description are not exhaustive. They can be modified to meet specific lighting purposes. The design elements of the LED spotlight have simple shapes that can be manufactured using known means with automated control.

Claims (7)

1. LED floodlight module comprising a heat-conducting radiator case, the cylindrical profile of which is formed by an external closed wall and at least one internal closed wall of the main chamber, interconnected by radial walls, together forming peripheral inner chambers, the walls of which comprise through ventilation ducts radiator case; a heat-conducting plate pressed into the side surface in the cavity of the main chamber; LED board mounted on the surface of said heat-conducting plate, with the possibility of heat exchange; an optical system comprising at least a cylindrical reflector mounted in the cavity of the main chamber of the radiator body; the rear end cover having through slots, which are a continuation of the ventilation channels of the radiator body. 2. The LED spotlight module according to claim 1, characterized in that the optical system of the LED spotlight module has one or more lenses mounted in the cavity of the main camera of the radiator body with the possibility of converting the LED radiation. 3. The LED spotlight module according to claim 1, characterized in that a protective nozzle is placed at the output end of the radiator case, provided at the periphery with through slots matching the continuation of the ventilation channels of the radiator case. 4. The LED spotlight module according to claim 1, characterized in that the radiator case is made of two or more parts mounted longitudinally and connected by means of a heat-conducting flange disk placed with the possibility of heat exchange between the connected parts of the radiator body. 5. A multi-module LED floodlight containing two or more modules connected to each other, each of which has an extruded radiator body, the profile of which is formed by an external closed wall and an internal closed wall of the main chamber, interconnected by radial walls, together forming peripheral internal chambers, walls which together comprise the through ventilation ducts of the radiator case; a heat-conducting plate pressed into the main chamber by a side surface; LED board mounted on the surface of said heat-conducting plate, with the possibility of heat exchange; an optical system comprising at least a cylindrical reflector mounted in the cavity of the main chamber, the outer wall of the radiator case of each module being provided with a longitudinal figured groove, and adjacent modules are connected to the gap by means of a connecting element forming a single-movable pair with the radiator cases . 6. The multi-module LED spotlight according to claim 5, characterized in that the profile of the figured groove is T-shaped. 7. The multi-module LED spotlight according to claim 5, characterized in that the profile of the outer wall of each radiator case is made in the form of a rectangle.

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