RU206731U1 - CONVECTION COOLED LED LUMINAIR - Google Patents

Abstract

The utility model relates to the field of lighting engineering, namely to LED-based lighting devices. The technical result is to increase the efficiency of heat dissipation and increase the service life of the lamp. The technical result is achieved by means of a convection-cooled LED lamp containing a casing that covers a heat sink element, on one side of which a control board is located, connected to a power supply, an LED module is placed on the opposite side, and said heat sink element is made in the form of a housing made of a heat-conducting material , on the side part of which there are through air ducts made in the form of longitudinal channels with grooves on the surface of the LED module, which are made along the entire length of the heat sink element, and a cover with a window fixed to the casing by means of fixing means.

Description

FIELD OF TECHNOLOGY

The utility model relates to the field of lighting engineering, namely to lighting devices based on LEDs.

LEVEL OF TECHNOLOGY

LED or light-emitting diode (abbr. LED from the English Light-emitting diode) is a semiconductor device with an electron-hole junction that creates optical radiation when an electric current is passed through it (http://ru.wikipedia.org/wiki/LED). The control of LEDs in luminaires is carried out using a control board, which, as a rule, is a printed circuit board (PCB - Printed Circuit Board), which is connected via appropriate connectors to the LEDs themselves, or it itself carries the placed LEDs connected using contact tracks. The control board houses the LED lighting control elements and the power supply (LED driver).

In recent years, the LED element has been the focus of attention as a light source in a wide variety of lighting applications. The LED element has the advantages of less heat dissipation, lower power consumption, longer service life, higher impact resistance. In the case where appropriate power is supplied and the corresponding heat dissipation element is provided to the LED element, although the LED element has been used for 0.1 million hours or longer, the LED element can maintain a lit state without any damage. The optical output of all light sources gradually decreases over time. Since humans cannot tell the difference at 80% of the initial light intensity, the lifespan of an LED lighting element is currently expected to be approximately 40 to 50 thousand hours. Therefore, an LED element can be a light source with a much longer lifespan than an incandescent lamp with a lifespan of 1500 hours and a fluorescent lamp with a lifespan of 10 thousand hours.

However, when the driving current of the LED element is increased to obtain a source of high brightness and power, the power loss of the LED element increases, as a result, most of the electrical energy is converted into heat, and the connection part of the LED element is in a high-temperature state.

Even though the current flowing through the LED element is uniform, when the temperature of the junction portion increases, the optical output of the LED element and its optical efficiency deteriorate, which also leads to a decrease in its service life.

From the prior art, the design of an LED lamp with dynamic convection cooling is known (patent RU 2684461 C1, 04/09/2019), which contains a hollow body with open end ends, on the outer surface of which an LED module is fixed connected to a power supply. The body has a consistent profile. The LED module is made with the overall dimensions of the base, corresponding to the overall dimensions of the base of the body, and is rigidly fixed to the shelves of the C-shaped profile by means of fasteners in such a way that together with the body it forms a closed tubular profile. The LED luminaire can be equipped with an optical element rigidly attached by means of fastening means to the shelves of the C-shaped profile of the housing, on top of the LED module. Detachable fasteners can be used as fasteners. In some cases of execution, one-piece fasteners can be used as fasteners. The power supply unit can be installed in the inner cavity of the case. The housing can be made of a thermally conductive material such as aluminum.

The disadvantages of this solution are insufficient case allocation due to the fact that the LED module is closely located with the driver and heat removal is carried out through the side walls on which the radiator grilles are located, which leads to low heat dissipation during long-term operation of the lamp and, as a result, to a decrease in its life service.

ESSENCE OF THE USEFUL MODEL

The technical problem being solved is to increase the efficiency of heat dissipation and removal, as well as to increase the luminaire's service life.

The technical result is to increase the efficiency of heat dissipation and increase the service life of the lamp.

The technical result is achieved by means of a convection-cooled LED lamp containing a casing that covers a heat sink element, on one side of which a control board is located, connected to a power supply, an LED module is placed on the opposite side, and the said heat sink element is made in the form of a housing made of a heat-conducting material , on the side part of which there are through air ducts made in the form of longitudinal channels with grooves on the surface of the LED module, which are made along the entire length of the heat sink element, and a cover with a window fixed to the casing by means of fixing means.

In one of the particular examples of the implementation of the luminaire, the heat removal element is made of a material selected from the group: aluminum, nickel, copper, or a combination thereof.

In another particular example of the implementation of the luminaire, the ducts contain additional through holes.

In another particular example of the implementation of the luminaire, the ducts contain transitions from a material with high thermal conductivity, which can be selected from the group: aluminum, nickel, copper, or combinations thereof.

In another particular example of the implementation of the luminaire, a layer of ceramic material is applied in the duct channels.

In another particular embodiment of the luminaire, the LED module contains a layer of ceramic material.

In another particular example of implementation of the luminaire, the heat removal element contains a platform for placing the control board.

In another particular example of the implementation of the lamp, the platform is made in the form of a depression on the surface of the heat sink element.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 illustrates a general view of the claimed luminaire.

FIG. 2 illustrates the arrangement of an LED module on a heat sink with a cover.

FIG. 3 illustrates examples of duct configurations.

FIG. 4 illustrates an example of an embodiment of a heat sink element with a platform for placing a control board.

IMPLEMENTATION OF THE USEFUL MODEL

As shown in FIG. 1, the claimed design of the LED lamp (10) consists of a casing (101) covering a heat sink element (103), on which a control board (102), a power supply or driver (not shown in Fig. 1) and an LED module (105) are located ...

The heat sink element (103) is a housing, which can be made of various shapes and configurations, made of a material (metal) with a high thermal conductivity, for example, aluminum, nickel, copper, or an alloy based on these metals. On the side of the heat removal element (103), air ducts (104) are made, which are air longitudinal channels along the entire length of the heat removal element (103), through which air is circulated.

The control board (102) is made in the form of a printed circuit board and contains elements for controlling the glow of the LED module (105). The connection of the control board (102) with the power supply and the LED module (105) is organized by standard means, for example, using a cable connection laid in the cavity or along the side of the body of the heat sink (103).

As shown in FIG. 2 to FIG. 3, grooves (109) are made on the surface of the heat sink element (103), to which the LED module (105) is attached, for example, using fasteners or an adhesive. The slots (109) are designed to allow hot air to pass through, which occurs when the LED module (105) is heated, and to transfer it to the duct channels (104) for subsequent dissipation.

As shown in FIG. 3, the design of the duct channels (104) can have a different configuration, for example, a rectangular section (pos. A)), a figured section (pos. B)), equipped with additional transitions or inserts ((1043), from the English Via, pos. B )). The ducts of the air ducts (104) are made in the body of the heat removal element (103) and are bounded by the walls (1041). In a particular case, the channels (pos. B)) may contain additional through holes (1042), which represent additional channels for heat removal. Presented in pos. C) transitions (1043) are also made of a metal with high thermal conductivity, for example, aluminum, nickel, copper or their combinations, providing additional heat dissipation. At the same time, the presented examples of channel configurations or the placement of transitions are only one of the many possible variations of their execution, without limiting other particular versions, while maintaining the structural features that are specific for the implementation of the declared solution of its technical function.

The walls (1041) of the ducts (104) can be coated with a ceramic layer to provide additional heat distribution efficiency. Also, a layer of ceramic material can be applied to the LED module substrate (105) to provide improved heat dissipation to the duct channels (104). The ceramic layer can be based on carbon, silicon oxide, aluminum oxide, boron oxide, titanium nitride and hafnium oxide.

The casing (101) fixes the heat sink (103) and the LED module (105) with a cover (106), which is attached to the casing with fasteners, for example, screws, corners or latches. A window (107) is made on the cover (106) to transmit light from the LED module (105) and protect the lighting elements from dust, moisture, and others. The casing (101) can also have grilles that cover the air ducts (104), while the grilles can be equipped with mesh filters to prevent contamination of the air channels.

FIG. 4 shows an example of placing the control board (102) in a special area (110), which is made in the form of a niche on the surface of the heat removal element (103). The use of a platform (110) allows the thickness or configuration of the casing (101) to be reduced. Also, in the site (110), a compartment for the power supply unit (driver) of the lamp (10) can be provided.

Effective heat dissipation is important for LEDs because the output power of LEDs often decreases as temperatures rise. When the temperature reaches a critical temperature, in some examples above 130 ° C, the output power of the LEDs can drop to almost zero. The use of the proposed luminaire design (10) allows efficient dissipation of heat from LEDs, so that LEDs have a higher output power (i.e. brighter) and a longer service life.

The use of a heat sink element (103) allows heat to be dissipated into the ambient air faster than using standard heat dissipation means such as radiators. If the ambient air is hotter than the solid (body of the heatsink), then heat transfer from the ambient air to the heatsink (103) will also be faster, allowing for faster heat absorption and dissipation. The presented application materials disclose preferred examples of the implementation of the technical solution and should not be construed as limiting other, particular examples of its implementation, which do not go beyond the scope of the claimed legal protection, which are obvious to specialists in the relevant field of technology.

Claims (9)

1. LED lamp with convection cooling, containing a casing covering the heat sink element, on one side of which there is a control board connected to the power supply, on the opposite side there is an LED module, while the said heat sink element is made in the form of a housing made of a heat-conducting material, on the side parts of which are made through air ducts, made in the form of longitudinal channels with grooves on the surface of the LED module, which are made along the entire length of the heat sink element, and a cover with a window, fixed to the casing by means of fixing means. 2. A luminaire according to claim 1, wherein the heat sink element is made of a material selected from the group: aluminum, nickel, copper, or a combination thereof. 3. A luminaire according to claim 1, wherein the air ducts comprise additional through holes. 4. The luminaire of claim 1, wherein the ducts comprise transitions of a material with high thermal conductivity. 5. The luminaire of claim 4, wherein the material is selected from the group: aluminum, nickel, copper, or combinations thereof. 6. A luminaire according to claim 1, wherein a layer of ceramic material is applied within the duct channels. 7. The light fixture of claim 1, wherein the LED module comprises a layer of ceramic material. 8. The luminaire of claim 1, wherein the heatsink comprises a platform for receiving a control board. 9. The luminaire of claim 8, wherein the platform is formed as a recess on the surface of the heat sink element.

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