KR101005566B1 - Teh lamp comprising temperature control method and function of dissipation property - Google Patents

Abstract

PURPOSE: A lighting device is provided to constantly maintain an inner temperature by repeatedly controlling a PWM(Pulse Width Modulation) current and an analog current. CONSTITUTION: An LED source(10) is arranged in a light source case(20). A current supply control module(30) supplies current to an LED source. The current supply module repeats an analog mode, a first temperature check mode, a first current control mode, a second temperature check mode, and a second current control mode. A heat radiation unit(40) is adjacently arranged on the rear of the light source case to discharge heat from the LED source. A cover(50) receives the light source, the light source case, the current supply control module, and the heat radiation unit.

Description

TEH LAMP COMPRISING TEMPERATURE CONTROL METHOD AND FUNCTION OF DISSIPATION PROPERTY}

The present invention is a current control method for temperature control, the cyclic operation of the analog method and the PWM method, and further delay the rise of the temperature in the mode of maintaining the analog method, and also the internal temperature of the luminaire in the event of an error of the current control method The present invention relates to a luminaire including a temperature control and a heat dissipation function, which is constituted by a heat dissipation plate having a high heat dissipation function capable of preventing a sharp rise.

LEDs must efficiently dissipate the heat generated at the rapidly increased LED pn junctions due to increased power input for improved light output. Otherwise, if the generated heat is continuously maintained inside, the temperature of the device is increased to prevent efficient light emission, and the life is drastically deteriorated by thermal stress.

When a forward voltage is applied to the electrode of the LED, holes of the p-type majority carrier diffuse into the n region, and electrons of the n-type majority carrier diffuse into the p region, where an energy gap occurs when electrons and holes recombine with each other near the junction. Light having a wavelength corresponding to the light is emitted. The wavelength of light emitted at this time depends on the material used.

The light output characteristics of the LED's voltage appear similar to the voltage-current curve because the light output changes in proportion to the current. In addition, the light output of the LED's operating voltage increases proportionally up to a certain voltage, but if the voltage exceeds a certain voltage, the light output decreases even if the voltage is increased. Damaged.

As a method of controlling the forward current proportional to the change in the light output, there are an analog control method for changing the value of the DC current and a PWM control method for supplying the current in the form of a pulse and adjusting the duty of the pulse.

However, when only the analog control method is used, the heat generated by the LED is continuously increased to shorten the lifespan of the product due to thermal stress as the temperature of the device increases, and when only the PWM control method is used, The problem is that the output is reduced.

Therefore, in order to solve such a problem, the heat generated from the LED is prevented from continuously rising and at the same time, the temperature rise is delayed as much as possible, and if the temperature exceeds a certain temperature, the current does not occur any more. There is a need for a technology that can extend the service life of LED products by reducing the thermal stress of the device by allowing the temperature to be maintained continuously within a certain range by changing the control method.

Republic of Korea Patent Registration 10-0943966 (Registration date February 17, 2010) Republic of Korea Patent Registration 10-0761960 (Registration date September 19, 2007) Republic of Korea Patent Publication 10-2009-0050469 (published May 20, 2009) Republic of Korea Patent Registration 10-0735460 (Registration Date June 27, 2007) Republic of Korea Patent Publication 10-2008-0100225 (published November 14, 2008)

The present invention is to maintain the temperature within a certain range by using a current control method of the cyclic method of analog and PWM method in order to prevent the product life is suddenly dropped due to the thermal stress caused by the continuous rise of the temperature of the device in the LED product. In order to make the temperature rise as slow as possible, the heat sink with excellent heat dissipation function is configured to delay the temperature rise of LED products as much as possible and to keep the temperature continuously within a certain temperature range. It is an object of the present invention to provide a luminaire including temperature control and heat dissipation that can extend the service life of LED products due to the reduction.

In order to achieve the above object,

The present invention is an LED light source,

A light source case in which the LED light source is installed;

A current supply control module for supplying current to the LED light source;

A heat dissipation unit installed adjacent to a rear surface of the light source case to dissipate heat generated from the LED light source installed in the light source case;

The light source, the light source case, the current supply control module, and a light fixture consisting of a cover portion for storing all sealed inside,

The current supply control module of the luminaire is an analog mode in which current flows to the LED by an analog method of varying and adjusting the level of the current value, and the LED temperature is controlled through a temperature sensor while continuously supplying current by the analog method. The first temperature check mode to check and the temperature value measured in the first temperature check mode exceeds the set temperature value, switching the duty of the square wave current flowing through the LED to the PWM method of the variable method 1 the current control mode, the second temperature check mode for checking the LED temperature through the temperature sensor while supplying current by the PWM method, and the temperature value measured in the second temperature check mode is less than the set temperature value, The second current control mode for switching back to the analog method and the second current control mode in the analog mode are repeatedly performed to maintain a constant temperature of the LED. It is configured to be retained within the stomach,

The heat dissipation part is preheated to make the billet soft by applying heat of 420 ° C. to 430 ° C. to the aluminum billet homogenized for 8 to 9 hours at 460 ° C. to 480 ° C., and applying heat of 410 ° C. to 425 ° C. to the extrusion die. And pushing the billet into a heat-dissipating member-shaped mold formed on the inner surface of the extrusion die, and having a ram speed of 5.0 mm / s to 5.5 at a temperature condition of an extrusion die of 430 ° C to 450 ° C and a billet of 445 ° C to 455 ° C. By using an extrusion mode for extruding at an extrusion rate of mm / s, and a heat treatment mode having a high heat dissipation function manufactured through a heat treatment mode of recrystallization treatment at 480 ° C. for 5 hours after passing through the extrusion mode, a current is supplied. Even if an error occurs in the current control mode of the control module, the luminaire including temperature control and heat dissipation function configured to extend the life of the LED product by preventing the temperature of the luminaire from rising sharply. The people in key technical configuration.

The heat sink of the heat dissipation unit has a purity of 99.00% or more, specific gravity (20 ° C.) 2.6986, melting point (° C.) 660.2, specific heat (100 ° C.) (cal / g ° C.) 0.226, latent heat (cal / g) 96.4, and electrical conductivity ( %) 69.94, aluminum with an electrical resistance temperature coefficient of 0.00429,

A plurality of plates are vertically arranged at regular intervals from each other, and an upper end portion of the plurality of plates spaced apart from each other so that heat exchange by contact with external air is performed, and the plurality of plates are integrally formed with each other to form a "U" shape. A heat dissipation member having a lower end having a cross section,

The heat dissipation member adhesive part which is bonded to the lower end of the heat dissipation member, and the base portion consisting of a fastening part formed with a plurality of coupling holes formed along the circumference of the heat dissipation member adhesive part are bonded to each other by a mutually conductive adhesive to form a unit heat dissipation plate Characterized in that made of mutual fastening.

As described above, in order to control that the heat generated by the LED light source rapidly increases the internal temperature of the luminaire, the luminaire according to the present invention adopts a current control scheme that repeats the analog and PWM schemes, thereby In order to keep the temperature constant, and also to delay the rise of the temperature as much as possible in the mode in which the analog method is maintained, and if the error of the current control method occurs, the internal temperature of the luminaire rises rapidly, causing frequent failure of the luminaire. In order not to, by installing a heat sink having a high heat dissipation function to configure the luminaire, there is an effect that can extend the product life of the LED luminaire as much as possible.

1 is a block diagram (a) showing the basic principle of analog current control and a graph showing the LED current waveform (b) according to analog current control.
Figure 2 is a block diagram (a) showing the basic principle of PWM current control and a graph showing the LED current waveform (b) according to the PWM current control.
3 is a system block diagram according to the present invention.
4 is a wiring diagram according to the present invention.
5 is a cross-sectional view schematically showing the configuration of a luminaire according to the present invention.
Figure 6 is a perspective view of a 40W luminaire comprising a temperature control and heat dissipation function of the present invention.
Figure 7 is a perspective view of a 60W luminaire including temperature control and heat dissipation of the present invention.
8 is a perspective view showing an 80W luminaire having a temperature control and heat dissipation function of the present invention.
9 is a perspective view showing a 100W luminaire having a temperature control and heat dissipation function of the present invention.
10 is a perspective view showing a 120W luminaire having a temperature control and heat dissipation function of the present invention.
11 is a perspective view showing a heat sink module for constructing a heat sink according to the present invention.

Detailed description of the technical configuration will be described with reference to the accompanying drawings.

Figure 1 is a block diagram (a) showing a general principle of analog current control and a graph showing the LED current waveform (b) according to the analog current control, analog current control is a variable to adjust the level of the current value flowing through the LED Say the way.

FIG. 1 (a) is a basic block diagram of analog illuminance control. After sensing the current flowing through the LED, a feedback voltage is applied to the controller through an amplifier. Here, the gain regulator is artificially adjusted to adjust the feedback voltage. It controls the current delivered to the output by adjusting the ON / OFF duty of the switch according to the feedback voltage. The adjustment of the feedback DC voltage affecting the output current adjusts the current flowing in the LED as shown in FIG.

2 is a block diagram (a) showing a general principle of PWM current control and a graph showing the LED current waveform (b) according to the PWM current control, wherein (a) shows the basic principle of PWM illuminance control, A switch and PWM controller are added to the basic constant current control circuit for driving the LEDs. The current flowing through the LED is sensed and applied to the feedback voltage of the controller through an amplifier, and the PWM controller is configured as a micro controller to make a PWM waveform. The PWM waveform controls the current flowing through the Power LED by turning on / off a switch connected in series with the LED. The waveform of the current flowing through the LED by the PWM waveform is shown in Fig. 2B. The current flowing through the LED is the same according to the PWM waveform applied by the microcontroller, and the RMS value of the output LED current changes according to the duty of the PWM waveform.

FIG. 3 shows a system block diagram according to the present invention, and FIG. 4 shows a wiring diagram according to the present invention. The system block diagram shown in FIGS. 3 to 4 is shown. Examples of the luminaire to which the diagram) and the wiring diagram are applied are shown in FIGS. 5 to 9.

5 is 40W CEILING LAMP LIGHT, FIG. 6 is 60W GUARD / WALKWAY LIGHT, FIG. 7 is 80W PARKING LOT LIGHT, FIG. 9 is 100W STREET LIGHT, and FIG. 10 is 120W STREET LIGHT.

The present invention is not in the appearance of the luminaire shown in Figs. 5 to 9, but to maintain the temperature of a certain range by exchanging the analog method and the PWM method as a current control method to the luminaire shown in Figs. At the same time, a heat sink with high heat dissipation function is installed to prevent sudden rise in temperature and to prevent failure due to thermal stress of the device caused by rapid temperature rise of the luminaire even when an error of the current control method occurs. .

As shown in FIG. 5, the technical configuration of the luminaire according to the present invention includes an LED light source 10, a light source case 20 in which the LED light source 10 is installed, and a current applied to the LED light source 10. A heat dissipation unit 40 disposed adjacent to a rear surface of the light source case 20 to dissipate heat generated from the current supply control module 30 and the LED light source installed in the light source case 20; The light source 10, the light source case 20, the current supply control module 30, the heat dissipation unit 40 is a luminaire consisting of a cover unit 50 to receive and seal the inside, the current supply control module of the luminaire 30 is an analog mode for flowing a current to the LED by an analog method of varying the level of the current value, and a method for checking the LED temperature through the temperature sensor while continuously supplying the current by the analog method. 1 temperature check mode and the first When the measured temperature value in the conduction check mode exceeds the set temperature value, the first current control mode for switching the duty of the square wave-shaped current flowing through the LED to a variable PWM method, and the current by the PWM method A second temperature check mode that checks the LED temperature through a temperature sensor while supplying a second temperature, and a second current control mode that switches back to an analog method when the temperature value measured in the second temperature check mode is less than a set temperature value; By repeating the second current control mode in the analog mode, the temperature of the LED is configured to be maintained within a certain range,

The heat dissipation unit 40 makes the billet soft by applying heat of 420 ° C. to 430 ° C. to the homogenized aluminum billet at 460 ° C. to 480 ° C. for 8 to 9 hours, and heat of 410 ° C. to 425 ° C. on the extrusion die. The billet is pushed into a heat-dissipating member-shaped mold formed on the inner surface of the extrusion die, and a pre-heating mode for applying a pressure is applied. Extrusion mode extruded at an extrusion rate of / s ~ 5.5mm / s, and after the extrusion mode is used a heat sink having a high heat dissipation function manufactured through a heat treatment mode of recrystallization treatment at 480 ℃ for 5 hours By doing so, even if an error occurs in the current control mode of the current supply control module 30 is configured to extend the life of the LED product by preventing the temperature of the luminaire to rise rapidly.

The current supply control module 30 is operated by a system block diagram of FIG. 3 and a wiring diagram of FIG. 4, and FIGS. 3 and 4 show a power supply. , LED driver, LED board, MCU (Micro-Controlling Unit), temperature sensor (Temp Sensor), the operation mode, if the power supply is supplied to the power supply, the power The temperature detection of the temperature sensor connected to the MCU starts at the same time as the LED driver, the LED board, and the MCU are supplied to the LED lamp.

When the temperature sensor exceeds the set value, the temperature excess signal is supplied to the MCU, and the MCU sends a signal to the LED driver and the LED board having a switching function, and the analog or PWM method is used to control the current. Will give you a transition.

When the power is supplied by the initial power supply, the LED by the analog method is activated and when the temperature value measured by the temperature sensor exceeds the reference value after a certain time, the current control method by the MCU The switching causes the LED to operate by the PWM method.

The MCU refers to a built-in memory, input and output control circuit of a certain capacity, as well as the CPU function in one chip of the MPU, in the present invention is to maintain the proper thermal diffusion by the MCU.

The aluminum billet is a cylindrical rod, and the homogenization treatment is to remove residual stress generated inside the billet due to coagulation during billet manufacture, and to increase hardness. When the homogenization temperature is less than 460 ° C., the homogenization treatment is effective. It is difficult to obtain, and if it exceeds 480 ° C, the mechanical properties may be degraded due to the change of the structure in the material, so that the homogenization treatment of the billet is preferably performed within the range of 460 ° C to 480 ° C.

And, if the homogenization treatment time is less than 8 hours, it is difficult to achieve the purpose of homogenization treatment because the homogenization treatment is not perfect, and if it exceeds 9 hours, the billet homogenization treatment is completed because Since the above time is meaningless, it is preferable that the homogenization treatment is performed for 8 to 9 hours in the temperature range of 460 ° C to 480 ° C.

The preheating of the billet and the extrusion die greatly affects the quality of the extruded article, and when the billet is preheated to less than 420 ° C., the extrusion of the billet is not performed well and the durability of the molded article is lowered and exceeds 430 ° C. Extrusion may not be easy. When the extrusion die is preheated to less than 410 ° C., the surface of the product is subjected to the surface friction of the molded article and the extrusion die in the extrusion mode, and when the extrusion die exceeds 425 ° C., the extrusion speed is affected. Can be difficult to shape the desired extrudate.

Therefore, the billet is preheated to a temperature range of 420 ℃ to 430 ℃ before extrusion molding, the preheating of the extrusion die is preferably made in a temperature range of 410 ℃ ~ 425 ℃.

In addition, when the extrusion die is extruded, the temperature affects whether the extruded product is defective. When the extrusion die is less than 430 ° C., the surface defects caused by friction between the extruded product and the die surface are large, and when the temperature exceeds 450 ° C. Since the production of an extruded product of a desired shape may be difficult, it is preferable to maintain the temperature during extrusion of the extrusion die at 430 ° C to 450 ° C.

In addition, it is preferable to maintain the temperature at the time of extrusion at 445 ° C. to 455 ° C. because the temperature at the time of extrusion of the billet also considers the temperature suitable for the durability of the extruded product and the production of a smooth extruded product.

In addition, the heat sink is 99.00% or more purity, specific gravity (20 ℃) 2.6986, melting point (℃) 660.2, specific heat (100 ℃) (cal / g ℃) 0.226, latent heat (cal / g) 96.4, electrical conductivity (%) 69.94, aluminum with an electrical resistance temperature coefficient of 0.00429,

As shown in FIG. 10, a plurality of plates 101 are vertically arranged at regular intervals, and an upper end portion of the plurality of plates 101 spaced apart from each other so that heat exchange by contact with external air is performed. The heat dissipation member 100 is composed of a lower portion having a plurality of plates 101 are joined together to form a "U" -shaped coupling section,

A base consisting of a heat dissipation member adhesive part 201 adhered to the lower end of the heat dissipation member 100 and a fastening part 203 having a plurality of coupling holes 202 formed along a circumference of the heat dissipation member adhesive part 201. The unit 200 is bonded to each other to form an integral,

The mutual adhesion of the heat dissipation member 100 and the base 200 is made by the conductive adhesive 300.

The luminaire including the temperature control and heat dissipation function according to the present invention is designed to extend the life of the LED product as much as possible. This significantly extends the life of the product, which has advantages in terms of use and economics, resulting in high industrial applicability.

10: LED light source
20: light source case
30: current supply control module
40: heat dissipation unit
50: cover part

Claims (3)

LED light source 10,
A light source case 20 in which the LED light source 10 is installed;
A current supply control module 30 for supplying current to the LED light source 10;
A heat dissipation unit 40 installed adjacent to a rear surface of the light source case 20 to radiate heat generated from the LED light source installed in the light source case 20;
In the luminaire made of a cover unit 50 for storing the light source 10, the light source case 20, the current supply control module 30, the heat dissipation unit 40 therein and sealed therein,
The current supply control module 30 of the luminaire
Analog mode for flowing current to the LED by an analog method of varying the level of the current value, and the first temperature check mode for checking the LED temperature through the temperature sensor while continuously supplying the current by the analog method And a first current control mode for converting a duty of a square wave current flowing through the LED into a variable PWM method when the temperature value measured in the first temperature check mode exceeds a set temperature value. A second temperature check mode that checks the LED temperature through a temperature sensor while supplying a current by a PWM method, and when the temperature value measured in the second temperature check mode is less than a set temperature value, the second temperature check mode; 2 the current control mode and the second current control mode in the analog mode is repeatedly performed so that the temperature of the LED can be maintained within a certain range. Luminaire including temperature control and heat dissipation, characterized in that. The method according to claim 1,
The heat dissipation unit 40 makes the billet soft by applying heat of 420 ° C. to 430 ° C. to the homogenized aluminum billet at 460 ° C. to 480 ° C. for 8 to 9 hours, and heat of 410 ° C. to 425 ° C. on the extrusion die. The billet is pushed into a heat-dissipating member-shaped mold formed on the inner surface of the extrusion die, and a pre-heating mode for applying a pressure is applied. Current supply by using a heat sink manufactured through an extrusion mode of extruding at an extrusion rate of / s ~ 5.5mm / s, and a heat treatment mode of recrystallization treatment at 480 ℃ for 5 hours after the extrusion mode Including a temperature control and heat dissipation function, characterized in that configured to extend the life of the LED product by preventing the temperature of the luminaire rises rapidly even if an error occurs in the current control mode of the control module 30 Luminaire.
The method according to claim 1,
The heat sink of the heat dissipation part 40 has a purity of 99.00% or more, specific gravity (20 ° C.), 2.6986, melting point (° C.) 660.2, specific heat (100 ° C.) (cal / g ° C.), 0.226, latent heat (cal / g) 96.4, and electrical conductivity. (%) 69.94Aluminum material with an electrical resistance temperature coefficient of 0.00429,
A plurality of plates 101 are vertically arranged at a predetermined interval from each other, the upper end portion is spaced apart from each other so that the plurality of plates 101 are spaced apart from each other so that heat exchange by contact with the outside air, and the plurality of plates 101 are mutually A heat dissipation member (100) formed integrally with a lower end portion having a coupling section of a “U” shape,
A base consisting of a heat dissipation member adhesive part 201 adhered to the lower end of the heat dissipation member 100 and a fastening part 203 having a plurality of coupling holes 202 formed along a circumference of the heat dissipation member adhesive part 201. Luminaire including temperature control and heat dissipation, characterized in that the unit 200 is bonded by a mutually conductive adhesive 300 is made of a plurality of mutually fastening of the heat sink of the modular structure formed integrally.

Images