RU123107U1 - HIGH-INTENSITY LED LIGHTING DEVICE - Google Patents

Abstract

1. A high-intensity LED lighting device containing a LED board enclosed in an optically transparent shell, a heat pipe, in the evaporation zone of which an LED board is installed on the heat-conducting plate, and in the condensation zone of the heat pipe there is a cooling unit equipped with a branched surface, characterized in that the heat the pipe is placed between two longitudinal heat-conducting plates connected to the surface of the heat pipe with the possibility of heat exchange, the LED board is fixed on the first plate, while both the board and the first plate are enclosed in an optically transparent shell, and the cooling unit is placed on the first and / or second plate. 2. The high-intensity lighting device according to claim 1, wherein a portion of the surface of the second plate is configured to enclose the optically transparent shell. A high-intensity lighting device according to claim 2, characterized in that the surface of the second plate facing the radiation sources is made with the possibility of specular and / or diffuse reflection of the light flux. A high-intensity lighting device according to claim 1, characterized in that the evaporation section of the heat pipe forms an angle with the condensation section, the value of which is close to 90 °. A high-intensity lighting device according to claim 4, characterized in that the cooling unit is located in the duct. The high-intensity lighting device according to claim 1, characterized in that a shutter is placed in the cavity of the optically transparent shell, which is installed with the ability to adjust the total luminous flux of the LEDs.

Description

- Field of technology

The solution relates to semiconductor lighting technology, namely, lighting using high-power LEDs and can be used in equipment for illuminating the pavement of squares, streets and highways, in particular, with the movement of vehicles.

- Prior art

LEDs are an effective light source, have low power consumption and long life.

However, the use of high-power LEDs for this application creates a problem with the dissipation of the generated heat. Given that the temperature mode of operation significantly affects the life of the LEDs, the problem of thermodynamic equilibrium becomes more acute the more powerful luminous flux you need to get to create normalized illumination.

A high-intensity LED lighting device is known that contains cooling means in the form of a radiator, a board with LEDs mounted on a heat exchanger, the heat carrier of which is enclosed in a pipe, the closed loop of which is partially located in the radiator (CN 101650016 (A), IPC F21V 29/00, published 17.02. 2010).

Known LED lighting devices containing cooling means in the form of an extended radiator. The board with LEDs is located directly on the radiator and is enclosed in an optically transparent shell (DE 102009023055 (A1), IPC F21S 4/00, published 02.12.2010 and WO 2009111098 (A2), IPC F21V 29/00, published 11.09.2009).

A high-intensity LED lighting device is also known that contains a board of light sources enclosed in an optically transparent shell, a heat pipe, a board of light sources is installed in the evaporation zone, and a cooling unit equipped with a branched surface is placed in the condensation zone of the heat pipe (CN 1018715593, Chinese application ( 21) 201010216371.5 dated (22) 07/02/2010, IPC F21S 2/00, published on 10.27.2011).

The disadvantage of the last of these analogues is the complexity of the proposed design, containing many fasteners that affect the complexity of the assembly of products. Critical is the direction of the radiator fins of the cooling unit. In the case of using such a device to illuminate a horizontal surface outdoors, the space between the ribs will inevitably become clogged, which will lead to a decrease in the heat transfer surface and, as a result, to overheating of the LEDs.

The technical result of the claimed solution is to increase the cooling efficiency of LEDs.

- Description of the essence of the solution

The claimed solution is characterized by the following set of features:

A high-intensity LED lighting device containing a light source board enclosed in an optically transparent shell, a heat pipe, in the evaporation zone of which a light source board is installed on the heat-conducting plate, and a cooling unit with a branched surface is placed in the condensation zone of the heat pipe, characterized in that the heat the pipe is placed between two longitudinal heat-conducting plates, one-piece connected to the surface of the heat pipe, the radiation source board is fixed a first plate, and wherein the first plate and the board are enclosed in an optically transparent shell and the cooling unit placed on the first and / or second plate.

As developing features that complement the above set, it is necessary to note the possibility of a special implementation of the cooling unit, including a curved heat pipe. In this case, the condensation section of the heat pipe forms a certain angle with its condensation section. The branched surface of the cooling unit in this case is made in the form of longitudinal plates. This embodiment of the cooling unit allows you to place a radiator with a large surface on the condensation section. But it is especially important that the vertical radiator can be located in the duct, which significantly enhance convection heat transfer and can significantly increase the power of the LEDs used, without fear of overheating.

The following clarifying characteristics should be indicated as additional:

- part of the surface of the second plate is configured to enclose an optically transparent shell.

The specified part of the surface of the second plate can be made of polymer materials and perform the function of protecting the shell from pollution and adjust the aperture of the angle of light radiation of the LED module. If this part of the surface of the second plate is made of a heat-conducting material, for example, aluminum, it will actually be an additional surface for dissipating excess heat. The implementation of this blackened surface will provide additional opportunities for heat transfer. That part of the surface of the second plate, which faces the radiation sources, can be made mirror and / or scattering light flux;

- the function of adjusting the aperture of the angle of light radiation of the LED cluster can be realized by placing the curtain inside the transparent shell. This embodiment is preferable for street applications, when it is necessary to limit the propagation of light flux in the undesirable direction, for example, in the oncoming traffic, to reduce material consumption and sail construction.

- Brief description of the drawings

The solution is illustrated by the following graphic materials:

figure 1 shows an axial section of the claimed device with a straight heat pipe;

figure 2 shows a cross section of the device depicted in figure 1;

figure 3 shows an axial section of a variant of the claimed device with a curved heat pipe;

figure 4 shows an axial section of a variant of the device depicted in figure 3, equipped with a convection amplifier.

The high-intensity LED lighting device (Fig. 1 and Fig. 2) contains a first plate 1 and a second plate 2, mounted on the heat pipe 3. On the first plate 1, LEDs 4 are placed on the evaporation section 3 'of the heat pipe 3, and on the section 3' ' of condensation of the heat pipe 3, a cooling unit is installed, provided with a developed surface, for example, in the form of a fin radiator 5. The LED cluster 4 is enclosed in an optically transparent shell 6, equipped with end caps 7, sealing the shell 6. Parts 2 'and 2' 'of the surface of the second plate S 2 made with the possibility of fencing the optically transparent shell 6 from the effects of the external environment. In the optical cladding 6 there is a curtain 8 for controlling the aperture of the angle of light emission of the LED cluster.

The difference between the option with a curved heat pipe is illustrated in figure 3. As can be seen in the drawing, the heat pipe 3 has an evaporation section 3 ', and the condensation section 3' 'is located at an angle close to 90 °. To obtain advantages in the presented embodiment, the radiator 5 should be oriented vertically, that is, the cooling surfaces of the radiator should be positioned so as not to impede the convection movement of the flow. In addition, with this design, the overall length of the lamp is reduced.

Another advantage of the option with a curved heat pipe 3 is the possibility of placing the cooling unit 5 in the duct (Fig. 4), by which the convection flow is amplified, intensifying the heat exchange between the surface of the radiator 5, the heat pipe 3 and the environment.

- Possibility of industrial application

The variants of the lighting device described in the description are not exhaustive. They can be modified or replaced with equivalent solutions to achieve specific lighting goals. The structural elements of the lighting device are known and can be manufactured using known means having automated control.

Claims (6)

1. High-intensity LED lighting device containing a LED board enclosed in an optically transparent shell, a heat pipe, in the evaporation zone of which a LED board is mounted on the heat-conducting plate, and a cooling unit provided with a branched surface is placed in the condensation zone of the heat pipe, characterized in that the heat the pipe is placed between two longitudinal heat-conducting plates connected to the surface of the heat pipe with the possibility of heat exchange, the LED board is fixed on the first plate, and wherein the board and the first plate is enclosed in an optically transparent shell and the cooling unit placed on the first and / or second plate. 2. The high-intensity lighting device according to claim 1, characterized in that a part of the surface of the second plate is configured to enclose an optically transparent shell. 3. The high-intensity lighting device according to claim 2, characterized in that the surface of the second plate facing the radiation sources is configured to mirror and / or diffuse reflect the light flux. 4. The high-intensity lighting device according to claim 1, characterized in that the evaporation section of the heat pipe forms an angle with the condensation section, the magnitude of which is close to 90 °. 5. High-intensity lighting device according to claim 4, characterized in that the cooling unit is located in the duct. 6. The high-intensity lighting device according to claim 1, characterized in that a curtain is placed in the cavity of the optically transparent shell, which is installed with the ability to control the total light flux of the LEDs.