KR-102963517-B1 - STREET SWEEPER EQUIPPED WITH AN AIR COOLED FUEL CELL SYSTEM

Abstract

The present invention relates to a road cleaning vehicle equipped with a fuel cell system, comprising: a fuel cell system (10) that generates electrical energy by hydrogen fuel; a drive unit (30) that operates to enable the road cleaning vehicle to drive by the electrical energy generated through the fuel cell system (10); a special unit (40) that enables the road cleaning vehicle to drive by the electrical energy generated through the fuel cell system (10) and perform operations such as road cleaning and fine dust removal; a power distribution device (20) that manages the operation of the vehicle and the special unit (40) by distributing the electrical energy generated through the fuel cell system (10) to the drive unit (30) and the special unit (40); and an air-cooled cooling device (50) for cooling the heat generated from the fuel cell system (10). By cooling the fuel cell system (10) by the air-cooled cooling device (50), space for installing a conventional water-cooled cooling device can be secured. It also has the effect of reducing the weight of the vehicle.

Inventors

• 정민관
• 최치환
• 김영구
• 이호영
• 김원영

Assignees

• 주식회사 에이엠특장

Dates

Publication Date

20260512

Application Date

20231228

Claims (4)

1. In a road sweeper equipped with a fuel cell system, A fuel cell system (10) that generates electrical energy using hydrogen fuel, and A drive unit (30) that operates to enable a road cleaning vehicle to drive by electric energy generated through a fuel cell system (10), and A special part (40) that enables a road cleaning vehicle to drive and perform operations such as cleaning the road surface and removing fine dust using electric energy generated through a fuel cell system (10), and A power distribution device (20) that manages the operation of the vehicle and the special equipment (40) by distributing the electric energy generated through the fuel cell system (10) to the driving unit (30) and the special equipment (40), and An air-cooled cooling device (50) for cooling heat generated in a fuel cell system (10), and The above air-cooled cooling device (50) is, An air intake section (51) that allows external air to be introduced for cooling of the fuel cell system (10), and An air filter unit that filters the air introduced through the air intake unit (51) to prevent foreign substances from entering the fuel cell system (10), and An air compression unit (53) that allows the incoming air to be supplied intensively to the fuel cell system (10) so that efficient cooling can be achieved, and An air cooling unit (54) for cooling the temperature of the air raised by air compression, and An air injection unit (55) that supplies cooled air to the fuel cell system (10) so that the generated heat can be cooled, and An air circulation unit (56) that allows air injected through an air injection unit (55) to cool the heat of the fuel cell system (10) to be discharged to the outside and circulated, and A road cleaning vehicle equipped with an air-cooled fuel cell system, characterized in that the air compression unit (53) and the air cooling unit (54) are configured so that their operation configurations can be set differently depending on the season.
2. In paragraph 1, The fuel cell system (10) is, A fuel cell stack (11) configured to be air-cooled to generate electrical energy by reacting hydrogen fuel with air, which is a purifying agent, and A battery (12) installed to supplement the power required in addition to the electrical energy generated from the fuel cell stack (11) when there is a sudden increase in external load, while enabling the fuel cell stack (11) to generate power smoothly, and A road cleaning vehicle equipped with an air-cooled fuel cell system, characterized by being composed of a power converter (13) that manages the supply of electrical energy generated from the air-cooled fuel cell to a place where an external power source is needed.
3. In paragraph 1, The special feature part (40) is, A suction inverter (41) that converts electrical energy distributed through a power distribution device (20) for driving a special suction device, and A suction motor (42) that operates to suck in and remove fine dust through electrical energy converted by a suction inverter (41), and A hydraulic inverter (43) that converts electrical energy distributed through a power distribution device (20) for driving a hydraulic device for special purposes, and A hydraulic pump motor (44) that enables the hydraulic device to operate through electrical energy converted by a hydraulic inverter (43), and A road cleaning vehicle equipped with an air-cooled fuel cell system, characterized by being composed of a brush motor (45) that operates by the supplied electrical energy after the electrical energy distributed through the power distribution device (20) is converted, thereby enabling road surface cleaning.
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Description

Street sweeper equipped with an air-cooled fuel cell system The present invention relates to a road cleaning vehicle equipped with an air-cooled fuel cell system configured to stably supply electricity to the drive unit and the special unit through a power distribution device of a special vehicle equipped with a fuel cell stack, while cooling the fuel cell stack in an air-cooled manner. Generally, special-purpose vehicles are equipped with a driving electric motor to drive the vehicle. In addition, hydraulic special-purpose vehicles are equipped with a special-purpose electric motor to generate hydraulic pressure and a special-purpose system to perform specific tasks using the generated hydraulic pressure. For example, specialized vehicles capable of processing garbage or waste are designed to use hydraulics to collect garbage or waste into a storage container and to compress the collected garbage or waste. In order to generate the above hydraulic pressure, a special-purpose electric motor is typically provided, and a hydraulic pump is driven in conjunction with the operation of the special-purpose electric motor, and is configured to generate hydraulic pressure in accordance with the operation of the hydraulic pump. As prior art for supplying electrical energy to a driving motor for driving a vehicle and a special-purpose motor for driving a hydraulic pump in a special-purpose vehicle, U.S. Patent Publication US2003-0117427 (published April 20, 2023) is known. According to the aforementioned prior art, the vehicle includes an energy storage means, which is a battery for storing electrical energy in advance and providing the stored electrical energy, and a driving motor and a special-purpose motor driven by the electrical energy provided by the energy storage means. The above-mentioned driving motor is driven by the supply of electrical energy from an energy storage means, enabling the vehicle to drive. In addition, the electric motor for the special equipment is driven by the supply of electrical energy from the energy storage means to drive the hydraulic pump, and hydraulic pressure is generated as the hydraulic pump is driven, enabling the special equipment system to perform a predetermined task. The aforementioned prior art drives a driving motor and a special-purpose motor of a special-purpose vehicle solely with electrical energy stored in an energy storage means. Therefore, a large amount of electrical energy must be stored in advance in energy storage devices. In order to store a large amount of electrical energy in an energy storage device, the charging capacity of the energy storage device must be large. However, increasing the charging capacity of the energy storage device leads to a larger size, and since the device is very expensive, it acts as a factor that increases the production cost of special-purpose vehicles. Furthermore, although vehicles powered by engines using gasoline or diesel fuel are currently the most common type of vehicle, the need for new energy sources is increasingly emerging due to various factors, such as environmental pollution and the depletion of oil reserves. As energy conservation and environmental issues become more prominent, fuel cells are being applied as a power source to replace conventional internal combustion engines in order to address these challenges. Fuel cell vehicles generate driving force by converting the chemical reaction energy of oxygen and hydrogen into electrical energy, and in this process, thermal energy is also generated by the chemical reaction within the fuel cell. Since the fuel cell stack typically reacts ideally at temperatures between 65 and 85 degrees, it is important to maintain these temperature conditions. To this end, cooling of the fuel cell system is required. Conventionally, however, a water-cooled cooling system is installed to cool the fuel cell system, which makes it difficult to secure space for cooling devices such as water-cooled pumps and cooling tanks, and results in a problem of increased vehicle weight. FIG. 1 is a block diagram illustrating the configuration of a road sweeper equipped with an air-cooled fuel cell system according to an embodiment of the present invention. FIG. 2 is a drawing illustrating the detailed configuration of the driving unit of the present invention. FIG. 3 is a drawing illustrating the detailed configuration of the feature part of the present invention. FIG. 4 is a drawing illustrating the detailed configuration of the fuel cell system of the present invention. FIG. 5 is a drawing illustrating the detailed configuration of the air-cooled cooling unit of the present invention. Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. FIG. 1 is a block diagram illustrating the configuration of a road sweeper equipped with an air-cooled hydrogen fuel cell system according to an embodiment of the present invention. A road cleaning ve