KR20220153827A - Valve assembly for hydrogen charging and discharging control of vehicle - Google Patents

Abstract

The present invention relates to a valve assembly for controlling hydrogen charging and discharging for a vehicle, which can prevent the risk of explosion by recovering high-pressure fuel discharged through a discharge valve when an abnormality occurs in the valve assembly. The present invention comprises: a filling port for charging and supplying hydrogen fuel; a transport passage for connecting the filling port and a storage tank and transporting charged fuel and supplied fuel; a bypass passage for connecting the filling port side of the transport passage and the storage tank side; a metering valve installed on the transport passage to adjust the flow rate of the charged and supplied fuel; a solenoid valve installed on the transport passage to regulate the flow of the charged and supplied fuel, to adjust pressure and to prevent reverse flow; a manual valve installed on the transport passage to manually regulate the flow of the charged and supplied fuel; a discharge valve installed on the bypass passage to transport fuel in the transport passage to the filling port side by opening the bypass passage; and a temperature-sensitive safety device installed between the storage tank and the manual valve to discharge the fuel if the temperature of the transport passage rises above a set temperature value.

Description

Valve assembly for controlling hydrogen charging and discharging for vehicles {VALVE ASSEMBLY FOR HYDROGEN CHARGING AND DISCHARGING CONTROL OF VEHICLE}

The present invention relates to a valve assembly for controlling hydrogen charging and discharging for a vehicle, and more particularly, to a valve assembly for controlling charging and discharging of a hydrogen fuel cell vehicle using a fuel cell that generates electricity by reacting hydrogen and oxygen as a power source.

In general, energy generation in a hydrogen fuel cell vehicle generates electric energy by flowing current through a reverse electrolysis phenomenon caused by a reaction between hydrogen, which is a fuel, and air. At this time, hydrogen is stored in the storage tank along the charging line of the hydrogen charging system. Hydrogen stored in the storage tank is supplied to the stack after being depressurized across the regulator along the supply line to generate electrical energy.

A conventional hydrogen charging system has a very complicated configuration because a charging line for storing hydrogen in a storage tank and a supply line for supplying hydrogen in the storage tank to the stack are separately provided.

Due to the complex configuration of the hydrogen charging system, there is a problem in that the amount of work is increased when fitting the piping of the charging line and the supply line, and many parts are consumed during the installation work.

In order to solve the problems of the prior art, the present applicant, as described in the patent literature, has a simple configuration capable of charging and discharging using one flow path by unifying the fuel charging line and the fuel supply line, and hydrogen charging and We have developed a valve assembly for discharge control.

The above-described valve assembly for controlling hydrogen charging and discharging for a vehicle relieves pressure in a transfer passage by discharging fuel to the outside by opening a discharge valve when an abnormality occurs in the valve assembly.

However, when the high-pressure fuel is directly discharged to the outside through the discharge valve, there is a risk of explosion when in contact with outside air. To prevent this, the discharge valve is connected with an adapter to recover the discharged high-pressure fuel There was a problem that the installation of the adapter was very cumbersome and inconvenient.

Registered Patent Publication No. 10-2139594 (2020.07.29)

The present invention is to solve the problems of the prior art described above, and when an abnormality occurs in the valve assembly, it is possible to recover the high-pressure fuel discharged through the discharge valve, thereby preventing the risk of explosion or the like. Vehicle hydrogen charging and discharging Its purpose is to provide a valve assembly for control.

In order to achieve the above object, the valve assembly for controlling hydrogen charging and discharging for a vehicle according to the present invention connects a charging nozzle and a storage tank when fuel is charged, and connects a storage tank, a stack, and a supply system when fuel is supplied.

Looking at its configuration, a filling port connected to the filling nozzle and the stack and supply system, a transfer passage connecting the filling port and the storage tank and transporting the charged fuel and supply fuel, and the filling port side of the transfer passage And a bypass passage connecting the storage tank side, a metering valve installed on the transfer passage to control the flow rate of the charged and supplied fuel, and installed on the transfer passage to control the flow of the charged and supplied fuel and pressure A solenoid valve for controlling and preventing reverse flow, a manual valve installed on the transfer passage to manually control the flow of charging and supplying fuel, and a solenoid valve installed on the bypass passage to open the bypass passage to transfer the fuel. A discharge valve for transferring fuel from the passage to the filling port side, and a temperature sensitive safety device installed between the storage tank and the manual valve to discharge fuel when the temperature of the transfer passage rises above a set value. .

In the present invention configured as described above, the discharge valve is installed on the bypass flow path connecting the filling port side and the storage tank side of the transfer flow path, so that the high-pressure fuel discharged through the discharge valve is discharged when an abnormality occurs in the valve assembly. Since it can be recovered, the risk of explosion or the like can be prevented.

1 is a schematic diagram of a valve assembly for controlling hydrogen charging and discharging for a vehicle according to an embodiment of the present invention.
2 is a view showing a charging process of a valve assembly for controlling hydrogen charging and discharging for a vehicle according to an embodiment of the present invention.
3 is a view showing a supply process of a valve assembly for controlling hydrogen charging and discharging for a vehicle according to an embodiment of the present invention.
4 is a view showing a recovery process of a valve assembly for controlling hydrogen charging and discharging for a vehicle according to an embodiment of the present invention.

A preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. Here, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, the same reference numerals in the drawings are used to indicate the same or similar components.

A valve assembly for controlling hydrogen charging and discharging for a vehicle according to an embodiment of the present invention connects the charging nozzle 10 and the storage tank 20 when charging hydrogen fuel, and connects the storage tank 20 and the stack when supplying hydrogen fuel. And a valve assembly connecting the supply system 30.

Here, the charging nozzle 10 is provided in a hydrogen charging station and is a nozzle for charging hydrogen fuel into a fuel cell electric vehicle (FCEV). In addition, the storage tank 20 is provided in the hydrogen fuel cell vehicle to store the hydrogen fuel charged through the charging nozzle 10, and the stack and supply system 30 is provided in the hydrogen fuel cell vehicle to store the hydrogen fuel ( 20) is a fuel cell that produces electricity by reacting hydrogen supplied from the air with oxygen in the air.

Referring to FIG. 1, a valve assembly for controlling hydrogen charging and discharging for a vehicle according to the present embodiment is as follows.

The valve assembly for controlling hydrogen charging and discharging for a vehicle according to the present embodiment includes a charging port 100 for charging and supplying hydrogen fuel, a transfer passage 200 connecting the charging port 100 and a storage tank 20, and The bypass flow path 300, the filters 410 and 420 installed in the transfer flow path 200, the metering valve 500, the solenoid valve 600, the manual valve 700, the temperature sensitive safety device 800, and the discharge valve ( 900).

Among the above configurations, the filling port 100 is connected to the filling nozzle 10 so as to store external fuel in the storage tank 20 . In addition, the filling port 100 is also connected to the stack and supply system 30 so that fuel stored in the storage tank 20 can be supplied to the stack and supply system 30 . That is, the filling port 100 connects a filling nozzle (not shown) and the storage tank 20 when fuel is charged, and connects the storage tank 20 and the stack and supply system 30 when fuel is supplied.

Therefore, when a charging nozzle (not shown) is connected to the vehicle, fuel is injected through the charging port 100 and the storage tank 20 is charged. On the other hand, when the vehicle is driven, the fuel in the storage tank 20 is supplied to the stack and supply system 30 through the filling port 100 .

The transfer passage 200 is a passage connecting the filling port 100 and the storage tank 20 . That is, when fuel is charged, the charged fuel is transferred from the filling port 100 to the storage tank 20 through the transfer passage 200, and when fuel is supplied, the supplied fuel is transferred from the storage tank 20 to the filling port 100. are transferred

In the transfer passage 200 described above, filters 410 and 420 for filtering the charged and supplied fuel, a metering valve 500 for adjusting the flow rate of the charged and supplied fuel, and controlling the flow of the charged and supplied fuel and adjusting the pressure A solenoid valve 600 that prevents reverse flow, a manual valve 700 that manually regulates the flow of charged and supplied fuel, and a temperature response that discharges fuel when the temperature of the transfer passage 200 rises above a set value. A mold safety device 800 is installed.

The bypass flow path 300 is a flow path connecting the charging port 100 side and the storage tank 20 side of the transfer flow path 200, and is a high pressure discharged to the outside when an abnormality occurs in the valve assembly for controlling hydrogen charging and discharging for a vehicle. It is a flow path for recovering fuel.

One end of the aforementioned bypass flow path 300 is connected between the filling port 100 and the metering valve 500, and the other end of the bypass flow path 300 is connected between the storage tank 20 and the manual valve 700. do.

On the other hand, a discharge valve 900 is installed in the bypass passage 300 to open the bypass passage 300 when an error occurs in the valve assembly and transfer the fuel in the transfer passage 200 to the filling port 100. .

The filters 410 and 420 are installed in the transfer passage 200 to serve to remove foreign substances such as moisture contained in the fuel in the process of charging fuel or / and supplying fuel, and the filling port 100 and It consists of a first filter 410 installed between the valves 500 and a second filter 420 installed between the solenoid valve 600 and the mandrel valve 700.

The metering valve 500 is installed between the filling port 100 of the transfer passage 200 and the solenoid valve 600, and serves to control the flow rate of charging and supplying fuel. At this time, the metering valve 500 uses the difference between the pressure of the charged fuel stored in the storage tank 20 through the transfer flow path 200 and the pressure of the fuel supplied to the engine through the transfer flow path 200. to control

The solenoid valve 600 is installed between the metering valve 500 and the manual valve 700 of the transfer passage 200, and serves to control the flow of charging and supplying fuel, regulate the pressure, and prevent backflow.

That is, the solenoid valve 600 operates according to a signal applied from the outside and opens or closes the transfer passage 200 . In more detail, the solenoid valve 600 opens the transfer passage 200 when charging and supplying fuel, but controls the charging and supplying fuel to be transferred at a constant pressure. In addition, when the fuel is fully charged in the storage tank 20, the transfer passage 200 is closed to prevent a reverse flow of fuel.

The manual valve 700 is installed between the solenoid valve 600 of the transfer passage 200 and the temperature sensitive safety device 800, and serves to manually regulate the flow of charging and supplying fuel. For example, when the solenoid valve 600 fails, the flow of fuel in the transfer passage 200 can be forcibly blocked by using the manual valve 700 .

The temperature sensitive safety device 800 is installed on the side of the storage tank 20 of the transfer path 200, and controls the temperature by discharging fuel when the temperature of the transfer path 200 rises above a set value. do. The temperature sensitive safety device 900 operates when the temperature of the storage tank 20 rises above a set value and discharges fuel.

The discharge valve 900 is installed on the bypass passage 300 to relieve pressure in the transfer passage 200 and to recover fuel at the same time.

For example, if an abnormality occurs in a valve assembly for controlling hydrogen charging and discharging for a vehicle while the solenoid valve 600 is closed, it is impossible to disassemble the solenoid valve 600 due to the high pressure of the transfer passage 200 .

In this case, when the discharge valve 900 is opened after closing the transfer passage 200 using the manual valve 700, the fuel on the transfer passage 200 flows to the filling port 100 through the bypass passage 300. are transferred At this time, the fuel transferred to the filling port 100 may be recovered to the stack and supply system 30 or discharged to the outside through the filling port 100 .

Therefore, it is possible to disassemble the solenoid valve 600 by relieving the pressure of the transfer passage 200, and since the high-pressure fuel discharged through the discharge valve 900 is recovered, the risk of explosion or the like can be prevented.

As shown in the drawing, a temperature sensor TS is connected to the storage tank 20, and the temperature sensor TS checks that the temperature rises as the pressure of the storage tank 20 increases during fuel charging. For this, it serves to detect that the storage tank 20 does not rise above a certain temperature.

2 to 4 are diagrams showing charging, discharging, and recovering processes of the valve assembly for controlling hydrogen charging and discharging for vehicles according to the present embodiment. Referring to the drawings, FIG.

[When refueling]

As shown in FIG. 2 , when a charging nozzle (not shown) of an external fuel supply source is connected to a vehicle, fuel is injected through the charging port 100 . The injected fuel is branched from the filling port 100 and transferred through the transfer passage 200 to be stored in the storage tank 20 .

Here, the filters 410 and 420 installed in the transfer passage 200 remove foreign substances contained in the charged fuel, the metering valve 500 controls the flow rate of the charged fuel, and the solenoid valve 600 allows the transfer of the charged fuel. while adjusting the pressure.

When fuel charging from an external fuel source is completed, the charging nozzle connected to the vehicle is disconnected. As such, when the filling nozzle is separated, the transfer passage 200 maintains a closed state and blocks the flow of fuel. That is, since reverse flow is prevented by the solenoid valve 600 in a state in which fuel is not injected through the transfer path 200 , no flow of fuel occurs on the transfer path 200 .

[When refueling]

As shown in FIG. 3 , when the vehicle is driven, the transport passage 200 is opened by the solenoid valve 600 and the fuel in the storage tank 20 is supplied to the stack and supply system 30 . That is, the fuel stored in the storage tank 20 is transferred to the filling port 100 through the transfer passage 200 and then supplied to the stack and supply system 30 .

Here, the solenoid valve 600 installed in the transfer passage 200 allows the supply of fuel to be transferred and controls the pressure, the metering valve 500 controls the flow rate of the supplied fuel, and the filters 410 and 420 control the supply of fuel. Remove the foreign matter contained in the

[When retrieving fuel]

When an abnormality occurs in the vehicle hydrogen charge and discharge control valve assembly while the solenoid valve 600 is closed, the transfer flow path 200 is closed by operating the manual valve 700 and the discharge valve 900 is opened to supply the transfer flow path. The fuel on the 200 is transferred to the filling port 100 through the bypass passage 300. At this time, the fuel transferred to the filling port 100 may be recovered to the stack and supply system 30 or discharged to the outside through the filling port 100 .

Meanwhile, even when the solenoid valve 600 does not have an abnormality, if the discharge valve 900 is opened, the fuel on the transfer passage 200 can be transferred to the filling port 100 side through the bypass passage 300.

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed in this specification, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operational effects according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be recognized.

10: filling nozzle 20: storage tank
30: stack and supply system 100: filling port
200: transfer flow path 300: bypass flow path
410,420: filter 500: metering valve
600: solenoid valve 700: manual valve
800: temperature sensitive safety device 900: discharge valve

Claims (6)

In the valve assembly for controlling hydrogen charging and discharging for vehicles, which connects the charging nozzle and the storage tank when charging fuel, and connects the storage tank, stack, and supply system when supplying fuel,
A charging port for charging and supplying hydrogen fuel;
a transfer passage connecting the filling port and the storage tank and transporting the charged fuel and the supplied fuel;
a bypass passage connecting the filling port side and the storage tank side of the transfer passage;
a metering valve installed on the transfer passage to control the flow rate of charging and supplying fuel;
a solenoid valve installed on the transfer passage to regulate the flow of fuel and supply fuel, regulate pressure, and prevent reverse flow;
a manual valve installed on the transfer flow path to manually control the flow of charging and supplying fuel;
a discharge valve installed on the bypass passage to open the bypass passage and transfer the fuel in the transfer passage to the filling port; and
A valve assembly for controlling hydrogen charging and discharging for a vehicle comprising a temperature sensitive safety device installed between the storage tank and the manual valve to discharge fuel when the temperature of the transfer passage rises above a set value.
The method of claim 1,
When the discharge valve is opened, the fuel transferred to the filling port side through the bypass passage is recovered to the stack and the supply system through the filling port.
The method of claim 1,
When the discharge valve is opened, the fuel transferred to the charging port through the bypass passage is discharged to the outside through the charging port.
According to claim 2 or claim 3,
One end of the bypass passage is connected between the filling port and the metering valve, and the other end of the bypass passage is connected between the storage tank and the manual valve. Valve assembly for controlling hydrogen charging and discharging for a vehicle.
The method of claim 4,
A valve assembly for controlling hydrogen charging and discharging for a vehicle, characterized in that it further comprises a filter installed on the transfer passage to remove foreign substances such as moisture contained in the fuel in the process of charging fuel or / and supplying fuel. .
The method of claim 5,
The filter is composed of a first filter installed between the filling port and the metering valve, and a second filter installed between the solenoid valve and the manual valve. Valve assembly for controlling hydrogen charging and discharging for a vehicle.

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