KR100944671B1 - Radiator for luminaires using LEDs - Google Patents

Abstract

According to the present invention, a heat radiator for a luminaire using an LED is disclosed. The heat dissipation device for a luminaire using the disclosed LED is for dissipating heat generated from a luminaire including an LED module, and is provided at a rear side of the LED module to receive heat generated from the LED module; A thermoelectric element whose cooling unit is installed at the rear of the heat sink to cool the heat sink by the Peltier effect; And a power driver connected to the LED module and the thermoelectric device simultaneously to control the power supply.

According to the heat dissipation device for the luminaire using the LED, by integrating the electrical connection between the LED module and the thermoelectric element and the power driver in a series or parallel manner, the cost of the product can be reduced as the structure is simplified, the power of the LED module Since the cooling efficiency of the thermoelectric element is automatically controlled in proportion to the heat generated due to the consumption, the heat dissipation effect can be expected as much as necessary without a separate power control. In addition, by attaching a heat sink between the thermoelectric element and the LED module, it protects the LED module when the thermoelectric element is inoperable or abnormal operation due to thermal runaway, and at the same time, the LED module due to frost or moisture condensation Breakage can be prevented.

LED, luminaire, heat dissipation, thermoelectric

Description

Heat-discharging apparatus for illuminator using LED

The present invention relates to a heat dissipation device for a luminaire, and more particularly, a heat dissipation device for a luminaire using an LED (Light Emitting Diode) module among the luminaires such as a vehicle headlight, an indoor light, an exterior light, in particular heat generated from the LED module It relates to a heat dissipation device for emitting the.

LED is widely used as a display component of various electronic products because it shows great advantages in processing speed, power consumption, and lifespan due to the characteristics of semiconductor. Recently, as high-luminance products have been developed, it has been spotlighted as an advanced lighting light source. . That is, a lamp using an LED module can be an efficient light source due to lower power consumption than a conventional light bulb, and in particular, since the LED element itself can implement various colors, it is not only applicable to various fields but also has excellent durability and replacement. There is an advantage that can reduce maintenance costs such as costs.

Recently, researches on luminaires using LED modules have been actively conducted. In particular, recently, not only luminaires for indoor lighting, but also exterior lightings such as street lamps installed outdoors and halogen lamps or high intensity (HID) In the field of vehicle headlights where a discharge lamp was used, headlights using LED modules are being applied, and research is being actively conducted.

However, the high-intensity LED lamps as described above are very difficult to apply and design due to the high heat generation temperature because of the very high heat generated when turned on, and if the proper heat radiation is not made, the efficiency and durability of the LED lamps are drastically reduced. There is a problem.

As an example for solving the heat dissipation problem of the LED lamp, a conceptual diagram of a heat dissipation device for a luminaire (here headlight for a vehicle) using a conventional LED is shown.

Referring to the drawings, the conventional heat sink for the luminaire, the LED module 10, the heat sink 20 to receive the heat generated from the LED module 10 to the collector 30, the heat collected in the collector The heat repeater 50 is received through the heat pipe 40, the final heat sink 60 installed in the rear of the heat repeater, the thermoelectric element (not shown) installed between the heat repeater 50 and the final heat sink ).

However, according to the above-described conventional radiator for luminaires, the thermoelectric element and the heat generating unit are simply joined in order to dissipate heat. When excessive current flows through the thermoelectric element and becomes overcooled, shortage occurs due to frost or moisture. There is a problem that the LED module is damaged.

In addition, there is a case that the LED module or IC requiring cooling is damaged due to the sudden failure of the thermoelectric element due to the electrical failure or the sudden rise in temperature caused by the thermal runaway due to the charging of the current. Unnecessary current may be applied, resulting in unnecessary loss of power.

Furthermore, in order to solve the above problems, a complicated circuit and wiring are additionally required to separately control the current of the thermoelectric element.

The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to provide a heat dissipation device for a luminaire using an LED having not only excellent design freedom and durability by employing a simple structure, but also high efficiency of heat dissipation effect. have.

The heat dissipation device for a luminaire using the LED to achieve the above object is to dissipate heat generated from the luminaire including the LED module, the heat sink is installed in the rear of the LED module to receive the heat generated from the LED module; A thermoelectric element whose cooling unit is installed behind the heat sink to cool the heat sink by the Peltier effect; And a power driver connected to the LED module and the thermoelectric device simultaneously to control a power supply.

The heat dissipation device may further include a rear heat sink installed at the rear of the thermoelectric element to receive heat generated from the heat generating portion of the thermoelectric element and discharge the heat to the outside.

In addition, the LED module, the thermoelectric element and the power driver may be connected in parallel.

Alternatively, the LED module, thermoelectric element and power driver may be connected in series.

According to the heat dissipation device for the luminaire using the LED according to the present invention, by integrating the electrical connection of the LED module and the thermoelectric element and the power driver in a series or parallel manner, it is possible to reduce the cost of the product as the structure is simplified, LED module Since the cooling efficiency of the thermoelectric element is automatically controlled in proportion to the heat generated by the power consumption, the heat dissipation effect can be expected as much as necessary without a separate power control.

In addition, by attaching a heat sink between the thermoelectric element and the LED module, it protects the LED module when the thermoelectric element is inoperable or abnormal operation due to thermal runaway, and at the same time, the LED module due to frost or moisture condensation Breakage can be prevented.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

Hereinafter, a heat radiating device for a luminaire using an LED according to an embodiment of the present invention will be described with reference to the drawings.

2 is a structural diagram showing a heat radiator for a luminaire using the LED according to an embodiment of the present invention, Figure 3 is a parallel connection of the LED module, thermoelectric element and power driver in the heat radiator for the luminaire using the LED shown in FIG. 4 is a conceptual diagram illustrating a series connection of an LED module, a thermoelectric element, and a power driver in a heat radiator for a luminaire using the LED illustrated in FIG. 2.

Referring to the drawings, the heat dissipation device (100,200) for LED using the LED according to an embodiment of the present invention is for dissipating heat generated from the luminaire including the LED module (10). The luminaire includes a headlamp for a vehicle, an interior lamp, an exterior lamp such as a street lamp installed outdoors, and can be applied to all kinds of luminaires implemented using an LED module. The LED module 10 includes an LED lamp 11 and a metal circuit board 12.

The heat dissipating device 100 and 200 includes a heat sink 110, a thermoelectric element 120, and a power driver 130.

The heat sink 110 is installed at the rear of the LED module 10 receives the heat generated from the LED module 10 to be discharged to the outside, a part of which is to the cooling unit 121 of the thermoelectric element 120 to be described later To pass. The heat sink 110 may be various shapes to increase the heat dissipation area, but the detailed description thereof will be omitted.

The thermoelectric element 120 and the cooling unit 121 are installed at the rear of the heat sink 110 to cool the heat sink 110 by the Peltier effect. Here, the Peltier effect is when two different metals are put together and electricity is applied, discontinuous phenomena of energy flow occur between the two metals, resulting in electromotive force, and one metal (cooling part) 121 is cold by this electromotive force. And the other metal (heating unit) 122 refers to a phenomenon in which the cold metal generates heat as it loses heat.

The power driver 130 is simultaneously connected to the LED module 10 and the thermoelectric element 120 to control the power supply. Here, the LED module 10, the thermoelectric element 120, and the power driver 130 may be connected in parallel as shown in FIG. 3. Alternatively, as shown in FIG. 4, the LED module 10, the thermoelectric element 120, and the power driver 130 may be connected in series.

The heat dissipating devices 100 and 200 are installed at the rear of the thermoelectric element 120 in order to increase heat dissipation efficiency, and receive a heat generated from the heat generating part 122 of the thermoelectric element 120 to release the heat to the outside. 140 may be further provided.

 Hereinafter, with reference to the accompanying drawings will be described the operation and effect of the heat radiation device for the luminaire using the LED according to an embodiment of the present invention.

In the exemplary embodiment of the present invention, the thermoelectric element 120 is used to dissipate heat generated when driving the LED module 10. The LED module 10, the thermoelectric element 120, and the power driver 130 may be used. Adopt a structure that connects in series or in parallel. Therefore, the single power driver 130 can simultaneously supply and control the current and voltage of the LED module 10 and the thermoelectric element 120, thereby preventing unnecessary waste of power. In particular, it is possible to obtain an optimal heat dissipation and cooling structure because the cooling effect can be obtained as much as necessary in proportion to the power consumed in the LED module 10.

In more detail, since the thermal conductivity is generated in proportion to the applied voltage and the amount of current, the thermoelectric element 120 enables an ideal and effective heat dissipation design proportional to the driving current and the voltage of the LED module 10. In addition, in recent years, in the production technology of thermoelectric devices, the thermoelectric device 120 can be driven even at a low voltage of about 1.9V, and its efficiency has reached a level capable of cooling 4 to 5W class. Thus, efficient design at various voltages is possible.

In addition, by arranging the heat sink 110 of a suitable capacity between a heat source such as the LED module 10 or the IC and the thermoelectric element, the LED module 10 even during abnormal operation due to the inoperable situation or thermal runaway of the thermoelectric element 120. ), As well as to prevent damage to the LED module 10 due to frost or moisture condensation.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

1 is a conceptual diagram showing an example of a heat radiator for a luminaire using a conventional LED,

2 is a structural diagram showing a heat radiation device for a luminaire using an LED according to an embodiment of the present invention,

3 is a conceptual diagram showing parallel connection of an LED module, a thermoelectric element, and a power driver in a heat radiator for a luminaire using the LED shown in FIG. 2;

4 is a conceptual view illustrating a series connection of an LED module, a thermoelectric element, and a power driver in a heat radiator for a luminaire using the LED shown in FIG. 2.

<Explanation of symbols for the main parts of the drawings>

10 ... LED module 100,200 ... heat radiator

110 Heatsink 120 Thermoelectric element

121 Cooling unit 122 Heating element

130 ... Power Driver 140 ... Rear Heatsink

Claims (4)

As the heat dissipation device (100,200) for dissipating heat generated from the luminaire including the LED module 10, A heat sink 110 installed at the rear of the LED module 10 to receive heat generated from the LED module 10; A thermoelectric element (120) installed at the rear of the heat sink (110) to cool the heat sink (110) by the Peltier effect; And The thermoelectric element 120 is connected to the LED module 10 and the thermoelectric element 120 to simultaneously supply and control the current and the voltage to the LED module 10 and the thermoelectric element 120. Heat dissipation device for a luminaire using an LED having a power driver 130 to operate in proportion to the drive current and the voltage of. The method of claim 1, Heat dissipation for a luminaire using an LED installed at the rear of the thermoelectric element 120 further includes a rear heat sink 140 that receives heat generated from the heat generating portion 122 of the thermoelectric element 120 and emits it to the outside. Device. The method according to claim 1 or 2, The LED module 10, the thermoelectric element 120 and the power driver 130 is a heat radiation device for a luminaire using an LED, characterized in that connected in parallel. The method according to claim 1 or 2, The LED module 10, the thermoelectric element 120 and the power driver 130 is a heat radiation device for a luminaire using an LED, characterized in that connected in series.

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