KR20210054127A - LED Lighting Apparatus For A Street Lamp - Google Patents

LED Lighting Apparatus For A Street Lamp Download PDF

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Publication number
KR20210054127A
KR20210054127A KR1020190139855A KR20190139855A KR20210054127A KR 20210054127 A KR20210054127 A KR 20210054127A KR 1020190139855 A KR1020190139855 A KR 1020190139855A KR 20190139855 A KR20190139855 A KR 20190139855A KR 20210054127 A KR20210054127 A KR 20210054127A
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South Korea
Prior art keywords
led
street light
led module
heat
solar
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KR1020190139855A
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Korean (ko)
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문서희
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주식회사 에스오디
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Priority to KR1020190139855A priority Critical patent/KR20210054127A/en
Publication of KR20210054127A publication Critical patent/KR20210054127A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
    • F21S9/02—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator
    • F21S9/03—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator rechargeable by exposure to light
    • F21S9/032—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator rechargeable by exposure to light the solar unit being separate from the lighting unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting

Abstract

The present invention provides an LED solar streetlight which can melt snow placed on a solar cell. The LED solar streetlight comprises: a streetlight housing (10); an LED module (20) disposed on a lower portion of the streetlight housing (10); a solar cell (30) positioned on an upper portion of the LED module (20) and exposed to a surface of the streetlight housing (10); a storage battery (40) accumulating power produced by the solar cell (30) and supplying the power to the LED module (20); and a heat conductor (50) interposed between the LED module (20) and the streetlight housing (10).

Description

엘이디 태양광 가로등{LED Lighting Apparatus For A Street Lamp}LED Solar Street Lamp{LED Lighting Apparatus For A Street Lamp}

본 발명은 엘이디 태양광 가로등에 관한 것이다. The present invention relates to an LED solar street light.

최근 엘이디 가로등이 차로변이나 도로에 설치된다. 엘이디 가로등은 효율이 뛰어난 장점이 있다. Recently, LED street lights are installed on the side of the road or on the road. The LED street light has the advantage of being excellent in efficiency.

태양광 가로등은 낮에는 쏠라셀을 이용하여 전력을 생산하여 저장하고, 밤에는 저장된 전력으로 가로등을 점등한다. 그런데 밤에 눈이 와서 솔라셀이 눈으로 덮힐 경우 낮동안 눈이 녹을 때까지 충전이 되지 않는 문제점이 있다. Solar streetlights use solar cells to generate and store power during the day, and at night, the streetlights are turned on with the stored power. However, when it snows at night and the solar cell is covered with snow, there is a problem in that it does not charge until the snow melts during the day.

따라서, 동절기에 쏠라셀에 덮인 눈을 녹일 수 있는 구조의 엘이디 태양광 가로등을 제공하고자 한다. Therefore, it is intended to provide an LED solar street light with a structure capable of melting the snow covered with the solar cell in winter.

실용신안출원 제20-2009-0012264호(엘이디가로등)Utility model application No. 20-2009-0012264 (LED Garo, etc.)

본 발명은 낮에는 엘이디 모듈로 열이 전달되지 않도록 하고, 밤에는 엘이디 모듈에서 발생된 열을 가로등 하우징으로 방열하여 쏠라셀에 올려진 눈을 녹일 수 있는 엘이디 태양광 가로등을 제공하고자 한다. An object of the present invention is to provide an LED solar street light capable of melting snow on a solar cell by preventing heat from being transferred to the LED module during the day and radiating heat generated from the LED module at night to the street light housing.

본 발명의 일측면에 따르면, According to one aspect of the present invention,

엘이디 태양광 가로등(100)은, The LED solar street light 100,

가로등 하우징(10)과; A street light housing 10;

상기 가로등 하우징(10)의 하부에 배치된 엘이디 모듈(20)과; An LED module 20 disposed under the street light housing 10;

상기 엘이디 모듈(20)의 상부에 위치하며 상기 가로등 하우징(10)의 표면으로 노출되는 쏠라셀(30)과; A solar cell 30 positioned above the LED module 20 and exposed to the surface of the street light housing 10;

상기 쏠라셀(30)에서 생산된 전력을 축전하여 상기 엘이디 모듈(20)에 공급하는 축전지(40)와; A storage battery 40 that stores electric power produced by the solar cell 30 and supplies it to the LED module 20;

상기 엘이디 모듈(20)과 상기 가로등 하우징(10) 사이에 개재되는 열전도체(50)를 포함한다. And a heat conductor 50 interposed between the LED module 20 and the street light housing 10.

또한,Also,

상기 열전도체(50)는 바이메탈로서 상기 엘이디 모듈(20)에서 열이 발생하면 팽창하여 상기 가로등 하우징(10)과 접촉하고, 상기 엘이디 모듈(20)에 열이 발생하지 않을 경우 수축하여 상기 가로등 하우징(10)과 접촉하지 않는 것을 특징으로 하는 엘이디 태양광 가로등을 포함한다. The heat conductor 50 is bimetal, and when heat is generated from the LED module 20, it expands and contacts the street light housing 10, and when the LED module 20 does not generate heat, the heat conductor 50 contracts to form the street light housing. (10) It includes an LED solar street light characterized in that it does not contact.

또한,Also,

상기 엘이디 모듈(20)은 기판(22)과 기판(22)에 결합된 제1 엘이디 그룹(21a)과 기판(22)에 결합된 제2 엘이디 그룹(21b)이 교대로 배열된 형태로 배치되며,The LED module 20 is arranged in a form in which a substrate 22 and a first LED group 21a coupled to the substrate 22 and a second LED group 21b coupled to the substrate 22 are alternately arranged. ,

상기 제1 엘이디 그룹(21a)이 1차 점등후 열을 받으면 소등되고, 이후 상기 제2 엘이디 그룹(21b)이 점등되며, When the first LED group 21a receives heat after the first LED group is turned on, it is turned off, and then the second LED group 21b is turned on,

상기 제2 엘이디 그룹(21b)이 열을 받으면 소등되고, 이후 상기 제1 엘이디 그룹(21a)이 점등되는 것을 특징으로 하는 엘이디 태양광 가로등을 포함한다. It includes an LED solar street light, characterized in that the second LED group (21b) is turned off when it receives heat, and then the first LED group (21a) is turned on.

본 발명은 가로등 하우징을 방열수단으로 사용하거나 사용하지 않을 수 있어서, 낮에는 엘이디 모듈로 열이 전달되지 않도록 하고, 밤에는 엘이디 모듈에서 발생된 열을 가로등 하우징으로 방열하여 쏠라셀에 올려진 눈을 녹일 수 있는 엘이디 태양광 가로등을 제공한다. In the present invention, the street light housing may or may not be used as a heat dissipation means, so that heat is not transferred to the LED module during the day, and at night, the heat generated from the LED module is radiated to the street light housing to prevent snow on the solar cell. It provides LED solar street lights that can melt.

도 1은 본 발명의 일 실시예에 따른 엘이디 태양광 가로등의 사시도.
도 2는 본 발명의 일 실시예에 따른 엘이디 태양광 가로등의 후면 사시도.
도 3은 본 발명의 일 실시예에 따른 엘이디 태양광 가로등의 단면도(열전도체가 팽창하지 않은 상태).
도 4는 본 발명의 일 실시예에 따른 엘이디 태양광 가로등의 단면도(열전도체가 팽창한 상태).
도 5는 본 발명의 일 실시예에 따른 엘이디 태양광 가로등에서 태양광 엘이디 모듈의 평면도.1 is a perspective view of an LED solar street light according to an embodiment of the present invention.
2 is a rear perspective view of an LED solar street light according to an embodiment of the present invention.
3 is a cross-sectional view of an LED solar street light according to an embodiment of the present invention (a state in which the heat conductor is not expanded).
4 is a cross-sectional view of an LED solar street light according to an embodiment of the present invention (a state in which a heat conductor is expanded).
5 is a plan view of a solar LED module in an LED solar street light according to an embodiment of the present invention.

이하에는, 본 발명의 바람직한 일 실시예를 첨부도면을 참조로 상세하게 설명하되, 이는 본 발명에 속하는 기술분야에서 통상의 지식을 가진 자가 본 발명을 용이하게 실시할 수 있을 정도로 상세하게 설명하기 위한 것이지, 이로써 본 발명의 사상 및 범주가 한정되는 것을 의미하지는 않는다.Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings, but this is for explaining in detail enough that a person of ordinary skill in the art pertaining to the present invention can easily implement the present invention. However, this does not mean that the spirit and scope of the present invention are limited.

도 1은 본 발명의 일 실시예에 따른 엘이디 태양광 가로등의 사시도이며, 도 2는 본 발명의 일 실시예에 따른 엘이디 태양광 가로등의 후면 사시도이며, 도 3은 본 발명의 일 실시예에 따른 엘이디 태양광 가로등의 단면도(열전도체가 팽창하지 않은 상태)이며, 도 4는 본 발명의 일 실시예에 따른 엘이디 태양광 가로등의 단면도(열전도체가 팽창한 상태)이며, 도 5는 본 발명의 일 실시예에 따른 엘이디 태양광 가로등에서 태양광 엘이디 모듈의 평면도이다.1 is a perspective view of an LED solar street light according to an embodiment of the present invention, Figure 2 is a rear perspective view of an LED solar street light according to an embodiment of the present invention, and Figure 3 is a perspective view of an LED solar street light according to an embodiment of the present invention. A cross-sectional view of an LED solar street light (a state in which the heat conductor is not expanded), FIG. 4 is a cross-sectional view of an LED solar street light (a state in which the heat conductor is expanded) according to an embodiment of the present invention, and FIG. 5 is an embodiment of the present invention. It is a plan view of a solar LED module in an LED solar street light according to an example.

본 실시예의 엘이디 태양광 가로등(100)은,The LED solar street light 100 of this embodiment,

가로등 하우징(10)과; A street light housing 10;

상기 가로등 하우징(10)의 하부에 배치된 엘이디 모듈(20)과; An LED module 20 disposed under the street light housing 10;

상기 엘이디 모듈(20)의 상부에 위치하며 상기 가로등 하우징(10)의 표면으로 노출되는 쏠라셀(30)과; A solar cell 30 positioned above the LED module 20 and exposed to the surface of the street light housing 10;

상기 쏠라셀(30)에서 생산된 전력을 축전하여 상기 엘이디 모듈(20)에 공급하는 축전지(40)와; A storage battery 40 that stores electric power produced by the solar cell 30 and supplies it to the LED module 20;

상기 엘이디 모듈(20)과 상기 가로등 하우징(10) 사이에 개재되는 열전도체(50)를 포함한다. And a heat conductor 50 interposed between the LED module 20 and the street light housing 10.

본 실시예의 엘이디 태양광 가로등(100)은 헤드 부분만을 도시하여 설명한다. The LED solar street light 100 of this embodiment will be described by showing only the head portion.

가로등 하우징(10)은 금속재질로 이루어지는 것이 좋으며, 상부의 표면에는 쏠라셀(30)이 결합되고, 하부에는 엘이디 모듈(20)이 결합된다. 가로등 하우징(10)의 내부에는 축전지(40)가 결합되어 있어서, 낮에 쏠라셀(30)로 생성한 전력을 축전지(40)에서 저장한다. The street light housing 10 is preferably made of a metal material, the solar cell 30 is coupled to the upper surface, and the LED module 20 is coupled to the lower portion. The storage battery 40 is coupled to the inside of the street light housing 10, so that the power generated by the solar cell 30 during the day is stored in the storage battery 40.

가로등 하우징(10)은 알루미늄과 같이 열전도성이 좋은 재질인 것이 좋다. The street light housing 10 is preferably made of a material having good thermal conductivity, such as aluminum.

엘이디 모듈(20)은 기판(22)에 엘이디 그룹(21)이 배열된 형태로서, 도 5와 같이 제1 엘이디 그룹(21a)과 제2 엘이디 그룹(21b)이 교대로 배열될 수 있다. 제1 엘이디 그룹(21a)는 1차 점등후 열을 받으면 이후 소등하고 제2 엘이디 그룹(21b)이 점등된다. 이후 제2 엘이디 그룹(21b)이 열을받으면 제1 엘이디 그룹(21a)이 점등된다. 이렇게 순차적으로 점등과 소등을 하여 엘이디의 열손상 및 방열 효율을 높이고자 한다. 본 실시예에서는 제1 엘이디 그룹(21a)과 제2 엘이디 그룹(21b)으로 이루어진 2열 배열이나, 3열 이상의 엘이디 그룹의 배열도 가능하다. In the LED module 20, the LED groups 21 are arranged on the substrate 22, and the first LED groups 21a and the second LED groups 21b may be alternately arranged as shown in FIG. 5. When the first LED group 21a receives heat after the first LED is turned on, it is turned off afterwards, and the second LED group 21b is turned on. Thereafter, when the second LED group 21b receives heat, the first LED group 21a is turned on. In this way, it is intended to increase the heat damage and heat dissipation efficiency of the LED by sequentially turning on and off. In this embodiment, a two-row arrangement consisting of the first LED group 21a and the second LED group 21b, or an arrangement of three or more LED groups is also possible.

가로등 하우징(10)과 엘이디 모듈(20) 사이에는 열전도체(50)가 개재되어 있어서, 엘이디 모듈(20)에서 발생된 열을 가로등 하우징(10)으로 전달한다. 열전도체(50)는 바이메탈로서 엘이디 모듈(20)에서 열이 발생하면 팽창하여 상기 가로등 하우징(10)과 접촉하고, 엘이디 모듈(20)에 열이 발생하지 않을 경우 수축하여 가로등 하우징(10)과 접촉하지 않는다.Since the heat conductor 50 is interposed between the street light housing 10 and the LED module 20, heat generated from the LED module 20 is transferred to the street light housing 10. The heat conductor 50 is bimetal, and when heat is generated from the LED module 20, it expands and contacts the street light housing 10, and when heat is not generated in the LED module 20, it contracts and contracts with the street light housing 10. Do not contact.

도 3과 같이, 주간에 외부열이 발생하더라도 가로등 하우징(10)과 열전도체(50)는 이격되어 있어서, 가로등 하우징(10)의 열이 내부로 전달되지 않는다. 도 4와 같이, 야간에는 엘이디 모듈(20)이 점등되어 열이 발생하면 바이메탈인 열전도체(50)가 팽창하여 하우징(10)과 접촉하여 열을 전달한다. As shown in FIG. 3, even if external heat is generated during the daytime, since the street lamp housing 10 and the heat conductor 50 are separated from each other, the heat of the street lamp housing 10 is not transferred to the inside. As shown in FIG. 4, when the LED module 20 is turned on at night to generate heat, the bimetallic thermal conductor 50 expands and contacts the housing 10 to transfer heat.

이와 같이, 엘이디 모듈(20)의 점등여부에 따라서, 열전도체(50)의 팽창여부가 결정되어서, 야간과 주간에 따라서 열의 전도를 제어할 수 있게 된다.In this way, depending on whether or not the LED module 20 is lit, whether or not the heat conductor 50 is expanded is determined, so that the conduction of heat can be controlled according to the night and daytime.

이상에서 본 발명의 실시예에 대해서 상세히 설명하였으나, 이는 하나의 실시예에 불과하며, 이로써 본 발명의 특허청구범위를 한정하는 것은 아니다. 본 실시예를 바탕으로 균등한 범위까지 당업자가 변형 및 추가하는 범위도 본 발명의 권리범위에 속한다 할 것이다.The embodiments of the present invention have been described in detail above, but this is only one embodiment, and thus, the claims of the present invention are not limited thereto. Based on the present embodiment, the scope of modifications and additions by those skilled in the art to the equivalent scope will also fall within the scope of the present invention.

가로등 하우징(10) 엘이디 모듈(20)
엘이디 모듈(20) 쏠라셀(30)
축전지(40) 열전도체(50)
엘이디 태양광 가로등(100)Street Light Housing(10) LED Module(20)
LED Module(20) Solar Cell(30)
Storage battery(40) Thermal conductor(50)
LED Solar Street Light(100)

Claims (3)

가로등 하우징(10)과;
상기 가로등 하우징(10)의 하부에 배치된 엘이디 모듈(20)과;
상기 엘이디 모듈(20)의 상부에 위치하며 상기 가로등 하우징의 표면으로 노출되는 쏠라셀(30)과;
상기 쏠라셀(30)에서 생산된 전력을 축전하여 상기 엘이디 모듈(20)에 공급하는 축전지(40)와;
상기 엘이디 모듈(20)과 상기 가로등 하우징(10) 사이에 개재되는 열전도체(50)를 포함하는 엘이디 태양광 가로등.
A street light housing 10;
An LED module 20 disposed under the street light housing 10;
A solar cell 30 positioned above the LED module 20 and exposed to the surface of the street light housing;
A storage battery 40 that stores electric power produced by the solar cell 30 and supplies it to the LED module 20;
LED solar street light comprising a heat conductor (50) interposed between the LED module (20) and the street light housing (10).
 제1항에 있어서,
상기 열전도체(50)는 바이메탈로서 상기 엘이디 모듈(20)에서 열이 발생하면 팽창하여 상기 가로등 하우징(10)과 접촉하고, 상기 엘이디 모듈(20)에 열이 발생하지 않을 경우 수축하여 상기 가로등 하우징(10)과 접촉하지 않는 것을 특징으로 하는 엘이디 태양광 가로등.
The method of claim 1,
The heat conductor 50 is bimetal, and when heat is generated from the LED module 20, it expands and contacts the street light housing 10, and when the LED module 20 does not generate heat, the heat conductor 50 contracts to form the street light housing. (10) LED solar street light, characterized in that it does not contact.
 제2항에 있어서,
상기 엘이디 모듈(20)은 기판(22)과 기판(22)에 결합된 제1 엘이디 그룹(21a)과 기판(22)에 결합된 제2 엘이디 그룹(21b)이 교대로 배열된 형태로 배치되며,
상기 제1 엘이디 그룹(21a)이 1차 점등후 열을 받으면 소등되고, 이후 상기 제2 엘이디 그룹(21b)이 점등되며,
상기 제2 엘이디 그룹(21b)이 열을 받으면 소등되고, 이후 상기 제1 엘이디 그룹(21a)이 점등되는 것을 특징으로 하는 엘이디 태양광 가로등.The method of claim 2,
The LED module 20 is arranged in a form in which a substrate 22 and a first LED group 21a coupled to the substrate 22 and a second LED group 21b coupled to the substrate 22 are alternately arranged. ,
When the first LED group 21a receives heat after the first LED group is turned on, it is turned off, and then the second LED group 21b is turned on,
LED solar street light, characterized in that the second LED group (21b) is turned off when it receives heat, and then the first LED group (21a) is turned on.
KR1020190139855A 2019-11-05 2019-11-05 LED Lighting Apparatus For A Street Lamp KR20210054127A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090012264U (en) 2008-05-28 2009-12-02 현대제철 주식회사 Dummy-Bar for the Continuous Casting Apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090012264U (en) 2008-05-28 2009-12-02 현대제철 주식회사 Dummy-Bar for the Continuous Casting Apparatus

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