KR100782527B1 - Led device having cooler - Google Patents

Abstract

An LED lighting device having a cooler is provided to emit a heat and cooling a light emitting unit although the light emitting unit heavily emits the heat due to an irregular power supply. An LED lighting device having a cooler includes a light emitting unit(10), a power supply unit(20), an oil cooling unit(30), and a support(40). The light emitting unit is constituted of plural LEDs(11). The power supply unit supplies a DC power to the light emitting unit. One surface of the oil cooling unit is in close contact with the light emitting unit. The oil cooling unit radiates and cools a heat generated from the LEDs. The support winds and supports the light emitting unit, the power supply unit, and the oil cooling unit. The oil cooling unit includes an oil retention basin, an oil injection port, and a gas discharge port. A check valve is installed in the gas discharge port of the oil cooling unit.

Description

Light emitting diode luminaire with cooling means {LED DEVICE HAVING COOLER}

1 is a perspective view of a lighting fixture configuration of the present application.

Figure 2 is an exploded perspective view of the lighting device configured in Figure 1;

Figure 3 is a cross-sectional perspective view showing the back of the cooling device.

4 is a side cross-sectional view of the luminaire.

Figure 5 is an exemplary view of a street lamp composed of the lighting fixture of the present invention.

******** Description of the main signs in the drawings ********

100: light fixture 10: light emitting unit

11 light emitting diode 12 lens

20: power supply section 30: cooling section

31: oil storage tank 32: oil inlet

33 gas outlet 34 wings

35 cooling oil 36, 37 check valve

40: support portion 41: cap

The present invention relates to a luminaire having a cooling means in the light emitting diode, and in a luminaire using a light emitting diode, when the rated current flows through the light emitting diode normally, the temperature is generally maintained at about 60 ° C., but the current is increased to a high temperature when more current than the rated current flows. Since there is a concern that it may be damaged by heat generation to provide a lighting device including a cooling means in the light emitting diode in consideration of the voltage change rate.

The diode can flow current in only one direction, and both ends of the diode basically have constant voltage characteristics when the current flows.

In other words, instead of generating a voltage drop proportional to the current like a resistor, it shows a constant voltage drop regardless of how much current flows. Therefore, when looking at the current-voltage graph of a diode, the voltage increases from zero to a certain line. Nearly no current flows, and the current rapidly increases almost vertically over the line, which is similar to a short circuit with a slight voltage applied, and a diode with such a strong constant voltage drop is particularly called a switching diode.

Of course, the actual diode is accompanied by a slight increase in voltage as the current increases, and when the current increases above a certain limit, the heat generation rate rises sharply, which may indicate that the device is damaged by excessive heat generation.

Lighting fixtures using light emitting diodes are not only more energy efficient than fluorescent lamps supplied after World War II, but also have a long lifespan and do not emit pollutants. Is promoting the development of light emitting diode lighting as a national project, and the world's leading lighting companies are also investing a lot by introducing prototypes of lighting equipment using light emitting diodes, so it is expected to replace fluorescent and incandescent lamps in the near future. to be.

The biggest advantage of lighting equipment using light emitting diodes is that it consumes less power than fluorescent lamps using fluorescent materials. Low diode fluorescent lamps are also selected because their electricity consumption is only 20% compared to conventional fluorescent lamps.It also has the advantage of not destroying the environment because of its long life of 10 years and no heavy metals such as lead or mercury.

Light emitting diodes using the shining properties of semiconductors are mainly used in liquid crystal displays, electronic displays, and automobile instrument panels of mobile phones, but they are expected to be used in automotive interiors, signs, backlight units (BLUs), and general lighting of liquid crystal displays. Light emitting diodes (UV LEDs) may be used as sterilization and sterilization devices, medical devices, etc. in addition to lighting. In the case of general lighting, which is rapidly growing in demand, multinational companies such as Lumirez, Osram and US Cree in Europe, Samsung Electro-Mechanics, LG Innotek, and Seoul Semiconductor are in the process of developing.

According to the present invention, in view of the characteristics of the LED diode as described above, in the luminaire using the light emitting diode, if there is much more current than the rated current due to the characteristics of the light emitting diode, there is a concern that the light emitting diode may generate heat at high temperature and be damaged. The present application has an object to provide a lighting device including a cooling means in the light emitting diode as a preventive structure for overcoming the above concerns in advance.

In addition, in the present application, to prevent the breakage of the light emitting diode to secure an oil storage tank having an inlet and an outlet to the rear of the light emitting diode, the oil storage tank has a built-in and storage of the cooling oil, the inlet of the oil storage tank cooling oil The check valve is installed at the outlet and the storage oil reaches the high temperature inside the oil storage tank, and when the gas is generated and the generated gas reaches the constant pressure, the check valve operates to discharge the gas. Its purpose is to provide a fitted luminaire.

The present invention relates to a lighting device having a cooling means for cooling the heat generated in the light emitting diode in a lighting device equipped with a light emitting diode, such as a street lamp, security lamp.

Light-emitting diodes are usually referred to as LEDs (Light Emitting Diodes), which are original diodes, which are light emitting diodes, are weaker than switching diodes, but LEDs also have the characteristic of a voltage-independent voltage drop. The brightness of is proportional to the current flowing through it.

The LED's specifications always show the current and voltage together, in a few volts to a few mA, depending on the manufacturer, but the red diode usually operates at a voltage of 1.6 volts, while the blue or white is higher than 3.5 volts. It operates at about 20mA and operates at rated current of about 20mA.

Here, the rated current refers to a current that ensures stability even when continuously operating while maximizing the performance of the device. As mentioned above, since LEDs have a characteristic of a diode, when a voltage slightly higher than the rated operating voltage is applied, an overcurrent flows. The risk of breakage cannot be ruled out.

In practical cases, LEDs are not easily broken because their switching characteristics are weak and as the current increases, more voltage rises than in the case of switching diodes, but this usage is undesirable because it ignores the basic characteristics of the diode, It is conceivable only after sufficient reliability test through the LED. Instead, it is preferable to use LEDs in series with resistors.

For example, if you want to drive a 3V 20mA rated LED with a 5V power supply, the voltage exceeding the rating will be 2V, so the resistance of R = 2V / 20mA = 100 Ohm is in series to cover 2V excess voltage at 20mA current. This resistor is technically used as a transconductance to convert a voltage source into a current source.

In general, a luminaire using a light emitting diode is composed of a light emitting unit consisting of an LED light emitting diode, a power supply unit for supplying power to the light emitting unit and a support unit for supporting the light emitting unit, the power supply unit.

In the light emitting unit, a plurality of light emitting diodes are supplied with power from a power supply unit to emit light, and a transfer lens is installed in each light emitting diode to emit light in a desired direction.

The power supply unit converts AC power to DC power and supplies the light emitting diodes to the light emitting unit, and may be configured to stop or resupply the power supply by adding a switch or a sensor for detecting the light intensity.

However, when power is supplied from the power supply unit to the light emitting unit, voltage may not be distributed evenly, and some light emitting diodes may cause an overcurrent to flow, causing high temperature heat to shorten or break the life and cause a failure.

Accordingly, in the present application, as a cooling means for attaching a cooling unit to a heat generating unit as a structure for preventing the failure case in advance, a light emitting unit comprising an LED light emitting diode, a power supply unit for supplying power to the light emitting unit, and a light emitting unit and a light emitting unit. Disclosed is a technical idea of a lighting device having a cooling unit for dissipating generated heat, and a structure having a light emitting unit, a power supply unit, and a support unit supporting the cooling unit.

The cooling unit has a storage space in which the cooling oil is internally formed, and is connected to the light emitting unit at one side thereof, and a plurality of wings are formed at the other side thereof to form a structure that dissipates heat by widening a contact surface with air.

The cooling oil may use a transmission oil that has a rapid heat transfer and is not explosive, for example, may use electrical insulating materials of KSC 2301 (Certification No. 295) of Unchang Petrochemical.

Preferably, the cooling unit is further provided with an oil supply pipe for supplying cooling oil therein and a gas discharge pipe for discharging gas generated from the cooling oil therein.

More preferably, the gas discharge pipe is provided with a check valve so that the valve is automatically opened when the pressure of the internal storage space of the cooling unit is increased to discharge the gas and close when the pressure drops.

Hereinafter, a preferred embodiment of the present invention will be described in detail with the accompanying drawings.

1 is configured as a luminaire to be used as a street lamp by using a light emitting diode, the luminaire 100 of the present application forms a support portion 40 for the housing to support the power supply portion and the heating portion to the outside, the transparent cap 41 is a support portion It is covered with the cover to allow light to pass through, and the housing has a power supply unit 20, a light emitting unit 10, and a cooling unit 30.

The power supply unit 20 supplies a rated DC voltage to the light emitting diodes of the light emitting unit, and the light emitting unit 10 emits light by causing the light emitting diodes 11 to emit light using the DC voltage supplied from the power supply unit. The cooling unit 30 is installed to have a means for cooling the light emitting diode in close contact with the bottom of the unit, the cooling unit to secure an oil storage tank in which the cooling oil is stored therein, and a plurality of wing forms to form a bend at the rear side It maximizes the contact surface with air to dissipate heat.

FIG. 2 is an exploded perspective view of the lighting apparatus of FIG. 1, in which a light emitting diode 11 of the light emitting unit is attached to a cooling unit, and a transfer lens 12 is attached to the light emitting diode to direct light. Indicates that it can be shot.

3 is a cross-sectional perspective view showing the rear of the cooling device, the oil storage tank 31 is secured to the inside, a plurality of wings 34 are formed while forming a bend, in particular the oil inlet 32 and the gas outlet (33) is shown.

Check valves 36 and 37 are installed in the oil inlet 32 and the gas outlet 33, respectively, and remain in a closed state, and when the oil is injected, the check valve of the oil inlet is opened to inject oil into the oil storage tank. When the gas is generated by a predetermined pressure or more, the check valve of the gas outlet can be opened to provide a structure to discharge the gas.

Figure 4 is a side cross-sectional view of the lighting device of the present application that can be used as a street lamp or a tunnel, showing a state in which the cooling oil 35 is injected into the oil storage tank, the oil is inclined to install the characteristics of the street lamp The cooling oil 35 inside the storage tank 31 is inclined and filled.

At this time, the oil filling tank 31 is divided into the oil-filled part and the gas generated part, the oil inlet 32 is installed on the lower end side of the inclined luminaire and the gas outlet 33 is the upper end of the luminaire It can be seen that it is preferable to discharge the gas generated in the oil storage tank is installed on the side through the check valve 37.

5 is an exemplary view showing an embodiment of a street lamp composed of a lighting device of the present invention, showing an embodiment of the present invention installed on the street lamp inclined with the ground.

The luminaire having the cooling means provided in the present invention can eliminate the risk of damage due to high heat even when used for a long time, and even if the power source is irregular, the light emitting part can radiate heat and cool the light emitting part even if the light emitting part is severely heated. It has the effect of providing a finished product that can be prevented in advance.

In particular, a gas discharge port provided with a check valve is formed and the cooling oil stored in the oil storage tank as a cooling means is discharged when gas is generated by heat generated from the light emitting unit, thereby increasing the pressure inside the oil storage tank and expanding it. It has an effect of preventing the problem to make in advance.

Claims (6)

In the lighting fixture to secure the illuminance using a light emitting diode (LED), such as a street light or security light, The lighting device 100 includes a light emitting unit 10 composed of a plurality of light emitting diodes 11, A power supply unit 20 for supplying DC power to the light emitting unit 10; One side is in close contact with the light emitting unit 10 and the oil cooling unit 30 for radiating and cooling the heat generated from the light emitting diode 11, Lighting unit having a cooling means, characterized in that provided including a light emitting portion (10), the power supply portion 20, the support portion 40 for wrapping and supporting the oil cooling portion (30). The method of claim 1, The oil cooling unit 30 secures an oil storage tank 31 for storing cooling oil therein, and at one side thereof, an oil inlet 32 for injecting cooling oil and a gas for discharging gas generated from the cooling oil. Lighting device having a cooling means characterized in that it comprises a discharge port (33). The method according to claim 1 or 2, The oil cooling unit 30 is a lighting device having a cooling means, characterized in that a plurality of wings (35) having a bent portion is provided on the side opposite to the surface in contact with the light emitting unit (10). The method of claim 2, Lighting fixture having a cooling means, characterized in that provided with a check valve 37 is provided in the gas outlet 33 of the oil cooling unit (30). The method according to claim 1 or 2, Cooling oil (35) stored in the oil cooling unit 30 is a lighting device having a cooling means, characterized in that using the transmission oil. The method according to claim 1 or 2, When the luminaire 100 is inclined with respect to the ground, the oil inlet 32 is a cooling unit bottom, the gas outlet 33 is provided with a cooling unit, characterized in that provided in the upper cooling unit .

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