KR-20260063167-A - Floor traffic lights with improved heat dissipation through liquid immersion cooling

Abstract

The present invention relates to a floor signal light configured to cool released heat and reduce vibrations transmitted to the circuit board by immersing a circuit board equipped with LEDs in insulating oil, and to separately collect moisture that has penetrated inside by utilizing the difference in specific gravity between water and insulating oil. The present invention relates to a "floor signal light installed at the boundary between a road and a sidewalk, comprising: a housing having one or more through holes formed on its upper surface and containing insulating oil inside; a circuit board having a plurality of light-emitting members installed on its upper surface; a coating member that blocks contact between the upper surface of the circuit board and the plurality of light-emitting members and the insulating oil; a rubber packing coupled along the perimeter of the upper surface of the housing; and a cover that surrounds the side of the housing, contacts the rubber packing, and covers the upper surface of the housing, wherein the circuit board is disposed in a receiving space formed by the combination of the rubber packing and the cover, and the insulating oil leaking out through the through holes in the receiving space cools the circuit board by liquid immersion cooling to cool the emitted heat, and the formed internal moisture is configured to converge to the bottom surface of the housing according to the difference in specific gravity."

Inventors

• 선상원

Assignees

• 주식회사 로드원

Dates

Publication Date

20260507

Application Date

20241030

Claims (6)

1. In ground traffic lights installed at the boundary between the road and the sidewalk, A housing (100) having insulating oil (200) contained inside and one or more through holes (110) formed on the upper surface; A circuit board (300) having a plurality of light-emitting members (310) installed on its upper surface; A coating member (400) that blocks contact between the upper surface of the circuit board (300), a plurality of light-emitting members (310), and insulating oil (200); A rubber packing (500) coupled along the perimeter of the upper surface of the housing (100); A cover (600) that wraps around the side of the housing (100), contacts the rubber packing (500), and seals the upper surface of the housing (100); is included and configured. The above circuit board (300) is, It is placed in a receiving space (S) formed by the combination of the above rubber packing (500) and cover (600), and A floor signal light with improved heat dissipation function by an immersion cooling method, characterized in that the insulating oil (200) leaked through the through hole (110) into the above receiving space (S) is configured to immerse the circuit board (300) in liquid cooling.
2. In paragraph 1, The above coating member (400) is characterized by containing epoxy resin and is a floor signal light with improved heat dissipation function through a liquid immersion cooling method.
3. In paragraph 1, A floor signal light with improved heat dissipation function by an immersion cooling method, characterized by further comprising: a light guide plate (700) provided on the upper surface of the coating member (400) and uniformly dispersing the light of the light-emitting member (310).
4. In paragraph 1, A floor signal light with improved heat dissipation function using an immersion cooling method, characterized in that the means for supplying power to the above circuit board (300) is composed of a waste battery and a solar cell.
5. In paragraph 1, A floor signal light with improved heat dissipation function using a liquid immersion cooling method, characterized in that moisture formed inside the housing (100) is configured to converge to the bottom surface of the housing (100) according to the difference in specific gravity.
6. In any one of paragraphs 1 through 5, A floor signal light with improved heat dissipation function by an immersion cooling method, characterized by further comprising: an expansion member (800) provided within the housing (100) and regulating internal pressure by repeatedly thermally expanding according to the temperature change of the insulating oil (200).

Description

Floor traffic lights with improved heat dissipation through liquid immersion cooling The present invention relates to a floor signal light configured to cool released heat and reduce vibrations transmitted to the circuit board by immersing a circuit board equipped with LEDs in insulating oil, and to allow moisture penetrating the interior to converge downwards by utilizing the difference in specific gravity between water and insulating oil. Ground-level traffic lights are road traffic facilities that significantly enhance the convenience of pedestrians and drivers. Installed on the ground at the beginning and end of crosswalks, they enable pedestrians and drivers to easily identify stop and walk signals in situations where their vision is obstructed by large vehicles, surrounding structures, or trees, or for the elderly and those with poor eyesight. In particular, they can prevent accidents caused by pedestrians crossing the crosswalk despite a stop signal while looking at their mobile phones instead of straight ahead. As such, ground-level traffic lights offer significantly improved signal visibility compared to conventional traffic lights, making them highly useful. However, as the name suggests, ground traffic lights are installed embedded in the ground, and they face the problem of damage caused by rainwater infiltration and condensation resulting from weather conditions such as snow and rain. In particular, if the load continuously accumulates due to vibrations generated by heavy vehicles driving on the road, the repeated formation of micro-cracks around the ground traffic lights leads to ground displacement and accelerates damage, resulting in significant economic losses. A conventional patent related to ground traffic lights is Registered Patent 10-2304484, "LED ground traffic light for crosswalks capable of preventing glare and improving visibility and durability." This patent aimed to improve waterproofness by blocking moisture and humidity from the outside through the upper and lower spaces of the PCB board installed inside the ground traffic light by filling them with epoxy. Although this patent supplemented the PCB with an epoxy cushioning material to mitigate the impact transmitted to the PCB, this restricted the path for heat to be released from the PCB, which could cause damage to the board due to overheating. Therefore, we propose an immersion cooling method to induce heat dissipation effects in inserts, including PCBs, and to reduce the impact directly transmitted to the inserts. In modern society, as most systems have become digitized and automated, the demand for servers has increased. Furthermore, with the rise of the Artificial Intelligence (AI) data center industry, heat generated from large amounts of data and power consumption has surged. Consequently, conventional air-based cooling methods have reached their limits, and the amount of electricity required to reduce heat generation is substantial. As a solution to this, the "liquid immersion cooling" method, which involves directly immersing heating elements into a container filled with liquid refrigerant, is emerging. This method is an oil-based cooling technique that cools heating elements (such as servers and circuit boards) by immersing them in a special cooling oil that is electrically non-conductive and has high thermal conductivity. It offers significant benefits in reducing physical installation space, cooling costs, and carbon emissions. Immersion cooling entered the 2020s and became widely commercialized, centered on data centers for cryptocurrency mining and artificial intelligence technology. The global immersion cooling market is also projected to grow at an average annual rate of 22.6% from $197 million in 2022 to 2030 due to factors such as the mass and high-speed of data usage, autonomous driving, and the rise of OTT (Source: Grand View Research). Representative fields where heat dissipation using immersion cooling is active include data centers with large-scale servers and electric vehicle batteries, and immersion cooling methods have become necessary to reduce the impact transmitted to LED substrates and improve heat dissipation effects. [Fig. 1] is an exploded view of a floor signal light according to the present invention. [Fig. 2] is a cross-sectional view of a floor signal light according to the present invention. [Fig. 3] is a cross-sectional view of a floor signal light according to the present invention equipped with an expansion member. The present invention relates to a "floor signal light installed at the boundary between a road and a sidewalk, comprising: a housing having one or more through holes formed on its upper surface and containing insulating oil inside; a circuit board having a plurality of light-emitting members installed on its upper surface; a coating member that blocks contact between the upper surface of the circuit board and the plurality of light-emitting members and the insulating oil; a r