KR101387087B1 - Street lamp using led - Google Patents

Abstract

An LED street lamp according to the present invention includes: an LED module which is formed by mounting a plurality of LEDs on a circuit board; a lower housing which includes an LED module receiving unit which is formed at the center thereof and receives the LED module, an inlet which is formed around the LED module receiving unit and to which air flows in, and a heat radiation fin which is formed on a side which is opposite to the LED module receiving unit; and an upper housing which is combined with the upper side of the lower housing and includes an outlet to output the air inputted through the inlet.

Description

LED Street Light {STREET LAMP USING LED}

The present invention relates to an LED street light, and more particularly, to an LED street light whose structure is improved to improve heat dissipation performance and waterproof performance.

In general, street lights are installed at pedestrians, roads, etc. at regular intervals to perform a function of lighting a road. The functions of these streetlights make it possible for people and cars to travel safely.

In the past, many streetlights with halogen or mercury lamps were used. Recently, however, LED streetlights have been used, which are capable of producing a variety of colors and have high luminous efficiency and relatively low power consumption.

However, LED street light is a high heat product, so if the heat dissipation is not properly made according to the heat temperature of the LED, the light efficiency is reduced, the life of the LED is shortened, and excessive heat generation of the circuit parts provides a cause of product failure.

In addition, since the LED street light is installed outdoors, it must be waterproof to prevent the rain from penetrating into the interior of the LED street light when it rains. However, the conventional LED streetlight has a problem that the cost is complicated because the waterproof structure is complicated.

Republic of Korea Patent Publication 10-2011-0024087 (2011.03.09 published)

The present invention is to solve the above problems, an object of the present invention provides an LED street light that can improve the heat dissipation performance by changing the structure.

Another object of the present invention to provide an LED street light that can prevent the penetration of moisture to the place where the electronic components, such as the LED is installed.

LED street light according to an aspect of the present invention, the LED module is formed by mounting a plurality of LEDs on the circuit board; A lower portion having an LED module seating portion formed in a central portion, on which the LED module is seated, formed around the LED module seating portion, an inlet through which air is introduced, and a heat dissipation fin provided on an opposite side of the surface on which the LED module seating portion is formed; housing; And an upper housing coupled to an upper portion of the lower housing and having an outlet through which air introduced through the air inlet is discharged.

A heat dissipation sheet may be further provided between the LED module and the LED module seating portion to transfer heat generated from the LED module to the heat dissipation fins.

The circuit board may be formed of aluminum.

The heat dissipation fins may be integrally formed with the lower housing and aluminum die casting.

The heat dissipation fins may be formed radially at regular intervals.

The inlet may be formed at a portion corresponding to a space between the radiating fins adjacent to each other.

The upper housing has a dome shape in which the cross-sectional area decreases toward the upper side, and the discharge port may be formed in a lateral direction of the upper housing.

A lens cover which supports the LED lens by having a plurality of LED lenses installed to correspond to the LEDs to cover the LEDs to diffuse the light of the LEDs, and a hole into which the plurality of LED lenses are inserted; A window cover covering the front surface of the module, a gasket seating portion provided in the lower housing, a waterproof gasket blocking water from entering the LED cover side, and a window for pressing the waterproof gasket. A fastening member coupled to the lower housing may be further provided through the cover and the waterproof gasket.

The waterproof gasket includes a body portion, an outer shield formed by bending from the outer edge of the body portion to the window cover to cover the edge of the window cover and to close the window between the lower housing and the window cover, and the inner edge of the body portion. Is formed and may include a fastening portion having a fastening hole is inserted into the fastening member.

The front and rear of the body portion may be provided with a plurality of waterproof projections protruding at a predetermined interval from the upper edge to the lower edge to block the water flowing from the outside in steps.

The lower housing may include an insertion protrusion protruding forward to be inserted into the fastening hole.

In order to block the inflow of water through the fastening hole of the window cover may be further provided with a rubber washer is inserted between the head of the fastening member and the front window cover.

According to the LED street light according to the present invention by changing the structure to improve the heat dissipation performance it is possible to prevent the light efficiency degradation and shortened product life.

In addition, the simple structure can improve the heat dissipation performance of the LED street light, reducing the cost of manufacturing the LED street light.

In addition, it is possible to improve the waterproof performance with a simple structure can reduce the cost of manufacturing street lights.

1 is a front perspective view showing the appearance of the LED street light according to an embodiment of the present invention.
Figure 2 is a rear perspective view of the LED street light shown in FIG.
3 is an exploded perspective view of the LED street light shown in FIG.
4 is a perspective view of the lower housing shown in FIG. 3;
5 is a cross-sectional view showing the internal air flow of the LED street light according to an embodiment of the present invention.
6 is a bottom view of the LED street light shown in FIG.
7 is a cross-sectional view taken along the line AA in FIG.
8 is a cross-sectional view taken along the line BB in FIG.
9 is a detailed view of the portion C in FIG.
10 is a detailed perspective view of the waterproof gasket in FIG.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the LED street light according to an embodiment of the present invention.

1 is a front perspective view showing the appearance of the LED street light according to an embodiment of the present invention, Figure 2 is a rear perspective view of the LED street light shown in Figure 1, Figure 3 is an exploded perspective view of the LED street light shown in Figure 1 4 is a perspective view of the lower housing illustrated in FIG. 3, and FIG. 5 is a cross-sectional view illustrating internal air flow of the LED street light according to the exemplary embodiment.

1 to 3, an LED street light according to an embodiment of the present invention includes an LED module 150 in which a plurality of LEDs 152 are mounted on a circuit board 151; And a housing 100 formed by combining a lower housing 120 having an LED module seating part 121 on which the LED module 150 is mounted, and an upper housing 110 coupled to an upper portion of the lower housing 120. Equipped.

The LED module 150 includes a plurality of LEDs 152 mounted on the circuit board 151. The LEDs 152 used here may be LEDs having high light efficiency such as power LEDs. The wire assembly 130 is introduced into the housing 100 to supply power to the LED module 150, and the lower housing (the end of the wire assembly 130 may be coupled to the LED module 150). The wire assembly through hole 125 is formed in the 150.

The upper housing 110 and the lower housing 120 are coupled to each other to form a main body 100 having a space S through which air can flow. A coupling protrusion 122 protruding to one side is formed in the lower housing 120 so that the upper housing 110 and the lower housing 120 can be coupled to each other, and the coupling protrusion 122 is inserted into the upper housing 110. Coupling groove 112 is formed. As such, the coupling protrusion 122 of the lower housing 120 is inserted into the coupling groove 112 of the upper housing 110 and then fastened with the fastening member 101 to thereby connect the lower housing 120 and the upper housing 110 to each other. Can be combined.

The housing 120 has an elliptical shape as a whole, and includes an LED module seating portion 121 recessed to one side so that the LED module 150 can be mounted at the center portion. A plurality of inlets 123 through which air is introduced are formed around the LED module seating part 121.

On the other hand, referring to Figure 4, the heat dissipation fin 124 is provided on the opposite side of the surface on which the LED module seating portion 121 is formed. The LED module 150 generates a lot of heat, but if the heat generated from the LED module 150 is not cooled, the light efficiency of the LED module 150 is reduced, the life is shortened, and the product breaks down due to excessive heat generation of circuit components. Can be.

Therefore, it is preferable that the heat dissipation fin 124 cools the heat generated from the LED module 150 as much as possible. As such, it is preferable that the surface area of the heat dissipation fin 124 is arranged to be as wide as possible in order to cool the heat generated by the LED module 150 as much as possible.

Accordingly, as shown in FIG. 4, the heat dissipation fins 124 are radially disposed in order to maximize the surface area where the heat dissipation fins 124 come into contact with air, and the plurality of heat dissipation fins 124 are installed at the same interval. And the heat dissipation fin 124 is disposed radially, and the inlet 123 through which the air that cools the heat dissipation fin 124 is disposed in the circumferential direction so that air introduced through the inlet 123 may pass between the heat dissipation fins 124. have. Therefore, the heat dissipation fin 124 can maximize the area in contact with the air can increase the heat dissipation efficiency of the heat dissipation fin 124.

Meanwhile, referring to FIGS. 3 and 5, the upper housing 110 is coupled to the upper portion of the lower housing 120. The upper housing 110 is provided with an outlet 113 through which the air introduced through the air inlet 123 formed in the lower housing 120 is discharged.

The upper housing 110 has a dome shape in which the cross-sectional area becomes smaller toward the upper side, and the discharge port 113 is formed in the lateral direction of the upper housing 110. The reason for making the upper housing 110 into a dome shape is to allow the air introduced from the inlet 123 to naturally rise along the inner surface of the upper housing 110. And the reason why the outlet 113 is formed in the lateral direction of the upper housing 110 is that the foreign matter such as rain or dust does not enter the inside of the housing (110, 120) through the outlet 113, while the air outlet 113 To get through well.

Next, the flow of air in the housing will be described with reference to FIG. 5.

The cold air introduced through the inlet 123 provided in the lower housing 120 cools the heat dissipation fin 124 and is warmed by the heat generated by the heat dissipation fin 124, and then discharges the exhaust port 113 provided in the upper housing 110. It is discharged to the outside of the housing 100 through. At this time, a plurality of inlets 123 are formed in the circumferential direction of the lower housing 120, and since the heat dissipation fins 124 are disposed radially, the cold air introduced from the inlets 123 maximizes the area in contact with the heat dissipation fins 124. The heat sink fin 124 can be cooled while the cooling efficiency can be increased. As such, the air heated by the heat dissipation fins 124 is naturally guided along the inner surface of the upper housing 110 having a dome shape to be guided toward the discharge port 113.

On the contrary, since the discharge port 113 is formed in the lateral direction of the upper housing 110 having a dome shape, foreign substances such as dust easily enter the space S formed inside the housing 100 through the discharge port 113. You won't be.

Referring back to FIG. 3, a heat dissipation sheet 140 may be installed between the LED module 150 and the LED module seating part 121 to transfer heat generated from the LED module 150 to the heat dissipation fins 124. The heat dissipation sheet 140 is formed of a metal material having high thermal conductivity, transfers the heat generated from the LED module 150 to the heat dissipation fins 124, and then cools the heat dissipation fins 124 to an appropriate level. You can keep it.

In addition, the circuit board 151 on which the LED 152 is mounted may also be formed of aluminum. In general, the circuit board 151 is formed of a resin such as epoxy, but the thermal conductivity of the circuit board 151 is good so that the heat of the LED module 150 can be transferred to the heat dissipation fin 124 through the heat dissipation sheet 140. It was formed of aluminum.

 In addition, the heat dissipation fin 124 is formed integrally with the lower housing 120 by aluminum die casting. If the heat dissipation fins 124 are manufactured separately, a separate structure for combining the heat dissipation fins 124 with the lower housing 120 is required, and thus the manufacturing cost may be increased because the structure is complicated and takes a long time to assemble. On the other hand, when the heat dissipation fin 124 is integrally formed with the lower housing 120, no gap occurs between the lower housing 120 and the heat dissipation fin 124, so that heat through the lower housing 120 is directed to the heat dissipation fin 124. It is easily delivered.

The front surface of the LED 152 is provided to correspond to the position where the LED 152 is installed is provided with a plurality of LED lenses 160 to cover the LED 152 to diffuse the light generated from the LED 152. In addition, the lens cover 170 supporting the LED lens 160 is provided with a hole 171 into which one end of the plurality of LED lenses 160 is inserted to fix the plurality of LED lenses 160.

The window cover 190 is installed on the front surface of the lens cover 170 to allow light generated from the LED to pass therethrough while preventing foreign substances such as moisture or dust from penetrating into the LED module.

Meanwhile, a waterproof gasket 180 is installed between the lens cover 170 and the window cover 190 to block the moisture from the window cover 190 from entering the LED module 140.

Meanwhile, a gasket seating portion 124 is formed to allow the waterproof gasket 180 to be mounted on the lower housing 120 so that the gasket 180 can be easily mounted. After the gasket 180 is formed in the gasket seating portion 124, the fastening member 191 penetrates the window cover 190 and the waterproof gasket 180 to be coupled to the lower housing 120 to pressurize the gasket 180. ).

Meanwhile, the LED street light according to the embodiment of the present invention has improved waterproof performance.

FIG. 6 is a bottom view of the LED street light shown in FIG. 1, FIG. 7 is a cross-sectional view taken along line AA in FIG. 4, FIG. 8 is a cross-sectional view taken along line BB in FIG. 4, and FIG. 9 is FIG. 7 is a detailed view of part C, and FIG. 10 is a detailed perspective view of the waterproof gasket in FIG. 3.

Hereinafter, the waterproof structure of the LED street light according to an embodiment of the present invention will be described in detail with reference to FIGS. 6 to 10.

The LED street light according to an embodiment of the present invention is to allow the space in which the LED module 150 is installed and the space outside the window cover 190 to be blocked from each other so that moisture or foreign matter penetrates into the space where the LED module 150 is installed. It will have a structure to prevent.

Referring to FIG. 10, in order to have such a waterproof structure, the waterproof gasket 180 surrounds an edge of the body portion 181 and the window cover 190 and closes between the lower housing 120 and the window cover 190. The outer blocking portion 182 formed by bending toward the window cover 190 from the outer edge of the body portion 181 and the fastening hole 183a formed at the inner edge of the body portion 181 and into which the fastening member 191 is inserted. It includes a fastening portion 183 having a.

Meanwhile, referring to FIG. 9, the lower housing 120 includes a gasket seating portion 126 on which the waterproof gasket 180 is seated. As such, since the lower housing 120 includes the gasket seating part 126, the position where the waterproof gasket 180 is seated can be easily determined. In addition, the lower housing 120 includes an insertion protrusion 127 protruding forward to be inserted into the fastening hole 183a provided in the fastening part 183 of the waterproof gasket 180. As such, the lower housing 120 is provided with an insertion protrusion 127, and the insertion protrusion 127 is inserted into the fastening hole 183a of the waterproof gasket 180 so that the coupling force of the waterproof gasket 180 and the lower housing 120 is provided. In addition, the insertion protrusion 127 may act as a step, thereby preventing moisture from penetrating into the space where the LED module 150 is installed.

On the other hand, the front and back of the waterproof gasket 180 body portion 181 is provided with a plurality of waterproof projections (184, 185, 186) to protrude at regular intervals going from the upper edge to the lower edge to block the water flowing from the outside in steps.

The waterproof protrusions 184, 185, and 186 are provided from the upper portion of the body portion 181 of the waterproof gasket 180 to the fastening portion 183, and one is provided around the fastening portion 183 of the waterproof gasket 180. That is, the upper two waterproof protrusions 184 and 185 of the waterproof protrusions 184, 185 and 186 are for waterproofing water that can flow between the lower housing 120 and the window cover 190 twice, and the fastening portion of the waterproof gasket 180. The other one waterproof protrusion 186 provided around the 183 is for blocking the moisture that may be introduced through the fastening part 183 around the fastening part 183 to waterproof.

As shown in FIG. 10, a plurality of fastening portions 183 of the waterproof gasket 180 are formed to protrude in a round shape at a predetermined interval below the body portion 181.

Meanwhile, a rubber washer 195 is inserted and fastened between the rear of the head of the fastening member 191 and the front of the window cover 190 to block the inflow of water through the fastening hole 190a of the window cover 190. . That is, the rubber washer 195 primarily blocks moisture that may flow between the fastening members 191, and the waterproof protrusion 186 for the fastening portion blocks secondly.

The plurality of waterproof protrusions 184, 185, and 186 are compressed by tightening the fastening member 191 when the lower housing 120 and the window cover 190 are coupled to each other. In addition, the fastening member 191 includes a screw, but in order to apply a uniform compressive force to maintain the same diameter from the head to the thread start point for a certain period and is provided to completely pass through the window cover 190. Therefore, a uniform compressive force can be maintained. And because the locking jaw (191a) is formed at the start of the thread of the fastening member 190, the locking jaw (191a) is no longer moved even if excessive pressure is applied to the insertion projection 127 of the lower housing 120. Do not.

Next, the operation of the LED street light having the waterproof structure as described above is as follows.

The waterproof gasket 180 is seated in front of the lower housing 120, and the window cover 190 is coupled to the front surface of the waterproof gasket 180.

At this time, in order to maximize the waterproof performance of the coupling structure, the outer blocking portion 182 is provided on the upper portion of the body portion 181 of the waterproof gasket 180. The external blocking portion 182 prevents water from penetrating between the window cover 190 and the lower housing 120.

Nevertheless, the front and back of the body portion 181 of the waterproof gasket 180 at a predetermined interval from the top to the bottom so as to block when moisture penetrates between the window cover 190 and the lower housing 120, waterproof projections 184, 185, 186 ) Is formed.

The waterproof protrusions 184, 185, and 186 are compressed when the window cover 190 and the lower housing 120 are coupled to each other to reinforce the waterproof function. That is, two waterproof protrusions 184 and 185 provided between the fastening portion 183 from the upper portion of the body portion 181 prevent water inflow twice.

And the fastening member 191 is fastened so that pressure is evenly applied to the waterproof gasket 180 coupled as described above. At this time, when the fastening member 191 starts to fasten and is fastened to a predetermined length, the locking jaw 191a is caught by the insertion protrusion 127 and stops without the fastening operation.

Therefore, since the fastening is always performed at a constant pressure to the waterproof gasket 180, the pressure is insufficient and the fastening force is not weak or loosening occurs, and the waterproof gasket 180 is prevented from being damaged due to excessive fastening force.

In addition, after the fastening member 191 is fastened, the waterproof gasket 191 and the rubber washer 195 are compressed to generate tension in the fastening member 191 through an inherent elastic force to prevent loosening, such as commonly used spring washers.

As described above, the rubber washer 195 has a function of first blocking the inflow of moisture through the fastening member 191. Nevertheless, the moisture that may flow into the fastening part 183 through the fastening hole 190a generated by the fastening member 191 is one waterproof protrusion 186 formed around the fastening part 183 of the waterproof gasket 180. Is blocked secondary.

As described above, the LED street light according to the embodiment of the present invention is provided with a primary waterproof means for blocking moisture before water is introduced into the waterproof gasket 180, so that moisture is unlikely to flow into the LED street light. Nevertheless, even though moisture is introduced into the waterproof gasket 180, the LED street light is completely waterproof because the secondary projection is blocked by the waterproof protrusions 184, 185, and 186 formed on the waterproof gasket 180.

In the above described the LED street light according to an embodiment of the present invention, the spirit of the present invention is not limited to the embodiment presented herein. And those skilled in the art to understand the spirit of the present invention can easily suggest other embodiments by the addition, modification, deletion, addition, etc. within the scope of the same idea, but this also falls within the scope of the invention something to do.

100: housing 110: upper housing
120: lower housing 140: heat dissipation sheet
150: LED module 160: lens
170: lens cover 180: gasket
190: window cover

Claims (12)

An LED module having a plurality of LEDs mounted on a circuit board;
A lower portion having an LED module seating portion formed in a central portion, on which the LED module is seated, formed around the LED module seating portion, an inlet through which air is introduced, and a heat dissipation fin provided on an opposite side of the surface on which the LED module seating portion is formed; housing;
An upper housing coupled to an upper portion of the lower housing and having an outlet through which air introduced through the air inlet is discharged; And
A heat dissipation sheet installed between the LED module and the LED module seating portion to transfer heat generated from the LED module to the heat dissipation fins,
The heat dissipation fin is integrally formed with the lower housing and aluminum die casting,
The upper housing has a dome shape in which the cross-sectional area is smaller toward the top, the discharge port is characterized in that formed in the lateral direction of the upper housing. delete The method of claim 1,
LED street light, characterized in that the circuit board is formed of aluminum. delete The method of claim 1,
LED lamp, characterized in that the heat radiation fin is formed radially at regular intervals. 6. The method of claim 5,
LED inlet is formed in a place corresponding to the space between the heat radiation fins adjacent to each other. delete The method of claim 1,
A plurality of LED lenses installed to correspond to the LEDs to cover the LEDs so that light of the LEDs is diffused;
A lens cover having a hole into which the plurality of LED lenses are inserted to support the LED lens;
A window cover covering a front surface of the LED module;
A waterproof gasket installed at a gasket seating portion provided in the lower housing to block water from the window cover side from flowing into the LED module;
The LED street light further comprises a fastening member coupled to the lower housing through the window cover and the waterproof gasket to pressurize the waterproof gasket. The method of claim 8,
The waterproof gasket
A body portion,
An outer shield formed around the edge of the window cover and bent toward the window cover from an outer edge of the body to close between the lower housing and the window cover;
LED street light, characterized in that it comprises a fastening portion formed on the inner edge of the body portion and having a fastening hole into which the fastening member is inserted. 10. The method of claim 9,
The front and back of the body portion LED street light, characterized in that provided with a plurality of waterproof projections protruding at regular intervals going from the upper edge to the lower edge to block the water flowing from the outside in steps. 10. The method of claim 9,
The lower housing has an LED street light, characterized in that it has an insertion protrusion protruding forward to be inserted into the fastening hole. The method of claim 8,
LED street light, characterized in that it further comprises a rubber washer is inserted and fastened between the back of the head of the fastening member and the front of the window cover to block the inflow of moisture through the fastening hole of the window cover.

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