KR-102964622-B1 - Apparatus for Freezing Prevention of Hydrogen Filling Nozzle

Abstract

The present invention relates to an anti-freezing device for a hydrogen charging nozzle that prevents the hydrogen charging nozzle from freezing while charging hydrogen through the hydrogen charging nozzle. The anti-freezing device for a hydrogen charging nozzle comprises: a first insulating member (11) coupled to the outer surface of the hydrogen charging nozzle (1) to block thermal energy; a heating cable (12) wound at regular intervals on the surface of the first insulating member (11) to generate heat with applied power; and a second insulating member (13) fixedly coupled on the first insulating member (11) and the heating cable (12) to block heat generated from the heating cable (12) from the outside. The present invention shortens the hydrogen charging time and improves safety.

Inventors

• 김광석

Assignees

• 대성파워텍(주)

Dates

Publication Date

20260513

Application Date

20240725

Claims (5)

1. In an anti-freezing device for a hydrogen charging nozzle, A first insulating member (11) coupled to the outer surface of a hydrogen charging nozzle (1) to block thermal energy; A heating cable (12) that generates heat with applied power and is wound at regular intervals on the surface of the first insulating member (11); A second insulating member (13) that is fixedly coupled on top of the first insulating member (11) and the heating cable (12) to block heat generated from the heating cable (12) from the outside; comprising A power supply unit (21) that supplies power for heating to the heating cable (12); A temperature sensor (22) for detecting the heating temperature of the heating cable (12); It further includes a controller (20) that controls the power supplied from the power supply unit (21) to the heating cable (12) based on the detection signal of the temperature sensor (22), The above controller (20) allows power from the power supply unit (21) to be supplied to the heating cable (12) when the charging button is turned on for charging hydrogen through the hydrogen charging nozzle (1), and outputs a control signal to cut off the power supplied to the heating cable (12) when the temperature sensor (22) detects the temperature of the heating cable (12) and the temperature is above a set temperature or the charging button is turned off. A device for preventing freezing of a hydrogen charging nozzle, wherein silica aerogel is applied as the first insulating member (11), polyurea or porous foam is applied as the second insulating member (13), and the surface of the second insulating member (13) is coated with silica aerogel tape.
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Description

Apparatus for Freezing Prevention of Hydrogen Filling Nozzle The present invention relates to a hydrogen charging nozzle, and more specifically, to an anti-freezing device for a hydrogen charging nozzle that prevents the hydrogen charging nozzle from freezing while charging hydrogen through the hydrogen charging nozzle. In general, hydrogen energy refers to an alternative energy source that stores and utilizes energy in the form of hydrogen. Hydrogen is an inexhaustible resource found everywhere on Earth and is attracting attention as a clean energy source because it does not emit carbon dioxide when converted through combustion or fuel cells. Furthermore, hydrogen fuel allows for energy generation through chemical batteries or combustion. Even if hydrogen cannot be obtained from sources capable of renewable energy, electrical energy can be extracted with high efficiency by oxidizing it through fuel cells. Such hydrogen fuel is establishing itself as a major energy source for vehicles and ships. Unlike fossil fuels such as oil or coal, hydrogen fuel does not emit carbon dioxide when combusted or converted into fuel cells, thus helping to mitigate climate change and air pollution. Conventionally, hydrogen is refueled at hydrogen refueling stations by connecting a hydrogen refueling nozzle to a vehicle's receptacle. At this time, since hydrogen is in an ultra-low temperature state, moisture from the atmosphere condenses on the nozzle and receptacle during refueling, causing freezing. Consequently, if freezing occurs after refueling, it becomes difficult to detach the nozzle from the receptacle; there was a problem in that the nozzle or receptacle could be damaged if the freezing had to be waited for to thaw or if the separation was attempted forcibly. FIG. 1 is a schematic diagram showing an embodiment according to the present invention in which an anti-freezing device is installed on a hydrogen charging nozzle. FIGS. 2 and FIGS. 3 are a perspective view and a cross-sectional view schematically illustrating an anti-freezing device for a hydrogen charging nozzle according to the present invention. FIGS. 4 and FIGS. 5 are a perspective view and a cross-sectional view schematically illustrating another example of an anti-freezing device for a hydrogen charging nozzle according to the present invention. FIG. 6 is a block diagram showing a configuration for controlling the operation of an anti-freezing device for a hydrogen charging nozzle according to the present invention. Hereinafter, an embodiment of the anti-freezing device for a hydrogen charging nozzle according to the present invention will be described in detail with reference to the attached drawings. FIG. 1a illustrates a hydrogen charging nozzle (1) connected by a hose (2) from a hydrogen charger installed at a hydrogen charging station. The hydrogen charging nozzle (1) is connected to a receptacle (3) equipped for charging hydrogen into a vehicle. At this time, when hydrogen gas is charged while the hydrogen charging nozzle (1) is connected to the receptacle (3), external moisture condenses on the hydrogen charging nozzle (1), and freezing occurs due to the extremely low temperature of the hydrogen. Accordingly, in the present invention, as shown in FIG. 1b, an anti-freezing device (10) is integrally coupled to the outer circumference of the hydrogen charging nozzle (1) to prevent freezing. The anti-freezing device (10) may be installed in the front part of the hydrogen charging nozzle (1) or installed over the entire hydrogen charging nozzle (1) connected to the hose (2). Furthermore, in FIGS. 2 and 3, the anti-freezing device (10) installs a first insulating member (11) so as to be in close contact with the outer periphery of the hydrogen charging nozzle (1). The first insulating member (11) is designed to block the low temperature of the hydrogen gas supplied through the hydrogen charging nozzle (1). The first insulating member (11) may be made of silica aerogel. Silica aerogel is a material that can insulate down to approximately minus 100°C and has a low thermal conductivity of approximately 0.010 to 0.040 W/mK. The heating cable (12) is wound at regular intervals on the surface of the first insulating member (11) and generates heat with the applied power. The heating cable (12) includes a metal resistance wire that has high thermal safety and is suitable for the amount of heat generated. The heating cable (12) has one or more heating wires embedded as resistance conductors, and the outer surface of the heating wires is insulated with Teflon insulation, which is an unsaturated resin for heat resistance and flexibility. A braid is covered over the Teflon insulation to shield against electromagnetic waves and increase the tensile strength of the cable to ensure stability, and a PVC heat-resistant wire is covered over the braid. The heating cable (12) has a structure in which a cold lead is joined between the power line connected from the power supp