RU2437128C1 - Light-emitting diode module - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: housing of the module is made from a light-transmitting jacket which accommodates a hollow metallic air-duct which is linked by the inner surface with the external medium in order to remove heat from the module during operation thereof. Air-tightness of the module is ensured by end plugs. The air-duct can be made from a metal pipe. A printed-circuit board can be placed on the outer surface of air-duct in order to assemble light-emitting diodes and an additional power supply. Part of the light-transmitting jacket, opposite the direction of radiation of the light-emitting diodes, is made not transparent. The end plugs can be made from silicon rubber.

EFFECT: simple design of the light-emitting diode module, unification of components thereof, thus reducing expenses on its manufacture, high efficiency of removing heat from the module during operation thereof.

11 cl, 2 dwg

Description

The invention relates to the field of lighting, and more specifically to lighting devices, and can be used in the manufacture of lighting devices for various purposes for their use both outside and inside buildings, structures, structures.

Similar solutions are well known in the art.

So, from patent publications: RU 83587 dated 06/10/2009, RU 85784 dated 08/10/2009, RU 88769 dated 11/20/2009, RU 90165 dated 12/27/2009, RU 92513 dated 3/20/2010. , RU 92714 of 03/27/2010, devices are known consisting of LEDs or LED modules, other electronic components located inside metal cases of various designs. During their operation, the LEDs or LED modules are sealed and heat is removed outside the sealed volume using special radiators installed outside or inside the metal case itself, which has a developed heat dissipation surface.

Also known from the prior art is a LED lamp (utility model according to the patent of the Russian Federation No. 91475, 02/10/2010, the closest analogue), containing a printed circuit board with LEDs and a temperature sensor, a radiator panel that has a ribbed surface on the back to increase the area of the cooling surface , an electric current converter including an electromagnetic interference filter, a high-frequency converter with a power corrector function, a current stabilizer.

A distinctive feature of this solution is the design of the optical lens, which allows you to evenly distribute the light flux in order to provide illumination of a certain surface, including and in the form of a rectangle with a given aspect ratio. An original way of attaching an electric current converter using brackets allows you to orient the LED block in the desired plane and control the direction of lighting. The radiator panel and the electric current transducer are connected by a flexible electric cable having a sufficient length so that the electric current transducer can be fixed to the radiator panel without tension and removed if necessary.

All of the above devices are complex in the production of components, have a high cost and weight, and also do not provide reliable sealing of the protected volume due to the effect of sucking in the airtight volume through moisture sealing strips during thermal expansion-contraction (thermal cycling) of the case during operation.

In addition, when operating outdoors (outdoors), heat dissipating surfaces become clogged with dirt, which leads to a deterioration in heat dissipation and a violation of the thermal regimes of LEDs and other electronic components.

The objective of the invention is to remedy the above disadvantages and cheapen the design, as well as the unification of its components.

One of the most significant technical results achieved by the implementation of the invention is to simplify the design of the LED module. The achievement of increasing the efficiency of heat removal from the module during its operation is also essential.

This task is achieved by the fact that in the known LED module comprising a housing, a printed circuit board and LEDs, according to the claimed invention, the module housing is made of a light-transmitting shell, inside which is placed a hollow duct communicating with the inner surface with the external environment in order to ensure heat removal from the module in the process its work, while the tightness of the module is ensured by end caps.

In development, the duct can be made of a metal pipe, and on the outer surface of the duct a circuit board for assembling the LEDs and an additional power source can be placed.

In addition, the part of the light-transmitting shell opposite to the direction of emission of the LEDs can be made opaque, and the end caps can be made of silicone rubber.

The invention is illustrated by graphic materials, in no way limiting all possible embodiments of the invention.

Figure 1 presents a sketch of the device in section. Figure 2 - presents a section of the device with a plane perpendicular to its axis.

The device consists of a housing, which is a light-transmitting shell (3), an air duct (1), made, for example, from a hollow metal profile made, for example, from an aluminum alloy.

At least one printed circuit board (2) with LEDs, electronic components, and secondary optics installed on it is located on the air duct (1). The material of the printed circuit board, the type of secondary optics, the method of mounting the printed circuit board to the profile do not matter and do not affect the essence of the invention.

A secondary power source (5) or any other electronic unit can be installed on the duct (1). The purpose of the node also does not affect the essence of the invention.

The air duct (1) is placed inside the light-transmitting shell (3), which acts as the external contour of the module casing. The material of the shell also does not matter and does not affect the essence of the invention.

The air duct (1) is secured and the internal volume of the shell (3) is sealed using end caps (4) having a shape corresponding to the profiles of the shell (3) and air duct (1). The plugs (4) can be made, in particular, of silicone rubber. The material of the plugs does not and does not affect the essence of the invention.

A cable (6) is passed through the hole in the plug (4) into the volume to be sealed.

The dimensions of the plug (4) and holes for installing the air duct (1) and cable entry (6) are selected based on the requirements of tightness of the assembly and operation of the module.

Part of the surface of the shell (3), opposite to the direction of radiation of the LEDs, can be made opaque by any known method.

The following is one of the possible examples of carrying out the invention, in no way limiting other methods of its implementation.

The heat-generating elements of the printed circuit boards (2) and the electronic unit (in particular, the power supply) (5) transfer heat to the duct (1).

The air temperature (Ta) inside the duct (1) rises and is higher than the ambient temperature (To).

Under the influence of the pressure difference between heated (Ta) and colder (That) air, as well as gravity, a laminar air flow arises in the air duct cavity, which removes heat from the air duct surface (1).

The air flow rate and, consequently, the resulting thermal resistance of the duct - the environment depend on the configuration of the duct section (1) and the angle of inclination of the duct axis (1) to the horizon. The geometric dimensions and configuration of the duct (1) are determined based on the operating conditions of the device.

The average steady-state temperature of the internal sealed volume (Ti) is lower than the average temperature inside the duct cavity and is close to the ambient temperature That.

With the right choice of duct sizes (1), a reduction in the mass of the device is achieved in comparison with similar purpose-known devices by more than 2 times.

The design of the device provides almost complete absence of the effect of “suction” of moisture and microparticles from the air during thermal cycling (heating - cooling cycles) due to the small temperature difference Ta-To and the elastic elements of the housing.

The device can be made from standard pipe profiles manufactured by the industry, which significantly reduces the cost of finished products.

The device has an extremely simple design and allows for configuration flexibility in the production of LED lamps.

The implementation of the invention achieves a significant simplification of the design of the LED module, the unification of its elements and, as a result, reduce the cost of its manufacture. It is also essential to increase the efficiency of heat removal from the module during its operation.

Claims (11)

1. An LED module comprising a housing, a printed circuit board and LEDs, characterized in that the housing of the module is made of a light-transmitting shell, inside of which is placed a hollow metal duct communicating with the internal surface with the external environment in order to ensure heat removal from the module during operation, when This tightness of the module is ensured by end caps. 2. The LED module according to claim 1, characterized in that the metal duct is made of pipe. 3. The LED module according to claim 1, characterized in that on the outer surface of the duct there is a printed circuit board for assembling the LEDs and an additional power source. 4. The LED module according to claim 2, characterized in that on the outer surface of the duct there is a printed circuit board for assembling the LEDs and an additional power source. 5. The LED module according to claim 1, characterized in that the part of the light-transmitting shell opposite to the direction of emission of the LEDs is made opaque. 6. The LED module according to claim 2, characterized in that the part of the light-transmitting shell opposite to the direction of emission of the LEDs is made opaque. 7. The LED module according to claim 3, characterized in that the part of the light-transmitting shell opposite to the direction of emission of the LEDs is made opaque. 8. The LED module according to claim 1, characterized in that the end caps are made of silicone rubber. 9. The LED module according to claim 2, characterized in that the end caps are made of silicone rubber. 10. The LED module according to claim 3, characterized in that the end caps are made of silicone rubber. 11. The LED module according to claim 5, characterized in that the end caps are made of silicone rubber.

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