Hydrogen filling device

Abstract

The present application provides a hydrogen filling device capable of suppressing mixing of water when a hydrogen tank is filled with hydrogen. The hydrogen filling device is provided with: a hydrogen supply unit; a collection tank through which the hydrogen supplied from the hydrogen supply unit passes; a main pipe which is a pipe extending from the collection tank; and a hydrogen supply branch pipe which is a pipe extending from the main pipe to the hydrogen tank. An inlet through which hydrogen flows from the hydrogen supply unit to the container unit; and an outlet which is provided above the inlet in the vertical direction and through which the hydrogen flows out from the container to the main pipe.

Description

Technical Field

[0001] The present disclosure relates to an apparatus for filling a hydrogen tank with hydrogen. Background Art

[0002] Patent Document 1 discloses that, in a hydrogen storage unit, a plurality of hydrogen tanks are mounted on a manifold, the plurality of tanks are filled with hydrogen through the manifold, and hydrogen is supplied from the plurality of tanks through the manifold.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2016-157522

[0004] When hydrogen is filled into multiple tanks from a hydrogen supply device, water attached to the hydrogen supply device side or the connection port with the hydrogen filling device, i.e., the hydrogen filling port (receptacle), sometimes flows into the tank together with the hydrogen. It is difficult to set a discharge port in the tank structure, and the water accumulated in the hydrogen tank is difficult to discharge. Even if the amount of water mixed in by one hydrogen filling is small, the amount of water will increase due to repeated filling, and there is still a concern that water will flow into the equipment using the hydrogen in the tank. Summary of the invention

[0005] In view of the above, an object of the present disclosure is to provide a hydrogen filling device capable of suppressing mixing of water when filling a hydrogen tank with hydrogen.

[0006] The present application discloses a hydrogen filling device for filling a plurality of hydrogen tanks with hydrogen, wherein the device comprises: a hydrogen supply unit; a capture tank for passing the hydrogen supplied from the hydrogen supply unit; a main pipe, which is a pipe extending from the capture tank; and a hydrogen supply branch pipe, which is a pipe extending from the main pipe to the hydrogen tank, wherein the capture tank comprises: a container unit; an inlet, which allows hydrogen to flow from the hydrogen supply unit into the container unit; and an outlet, which is arranged vertically above the inlet, allowing hydrogen to flow out from the container unit to the main pipe.

[0007] A flow path that spirally extends from the inlet toward the outlet may be provided in the container portion.

[0008] A porous wall may be provided on the outer periphery of the spirally extending flow path.

[0009] According to the hydrogen filling device of the present disclosure, water mixed in hydrogen is removed by the capture tank before hydrogen is supplied to the hydrogen tank, so that inflow of water into the hydrogen tank can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a diagram for explaining the hydrogen gas cylinder 10 .

[0011] Figure 2 This is the appearance of the hydrogen filling device 20 .

[0012] Figure 3 This is a diagram for explaining the internal structure of the hydrogen filling device 20 .

[0013] Figure 4 It is from Figure 3 A diagram illustrating the internal structure of the hydrogen filling device 20 from different viewpoints.

[0014] Figure 5 This is a diagram for explaining the structure of the collection tank 30 .

[0015] Figure 6 This is a diagram for explaining the structure of the collection tank 40 . DETAILED DESCRIPTION

[0016] 1. Hydrogen tank

[0017] First, a hydrogen cylinder which is one embodiment of a hydrogen tank filled with hydrogen by the hydrogen filling device of the present disclosure will be described.

[0018] The hydrogen cylinder 10 is a container for storing hydrogen in a liquid state or a gaseous state. Figure 1 A diagram for explanation is shown in FIG. Figure 1 (a) is an external view of the hydrogen gas cylinder 10 (the inner tank body 11 is indicated by a dotted line). Figure 1 (b) is a cross-sectional view taken along the axis O of the hydrogen cylinder 10 . As can be seen from these figures, in this embodiment, the hydrogen cylinder 10 includes a tank body 11 and a casing 17 .

[0019] The tank body 11 includes a liner 12 , a reinforcement layer 13 , and a protective layer 14 constituting a container body. A joint 15 is disposed on the container body, and an on-off valve 16 is disposed on the joint 15 .

[0020] 1.1. Lining

[0021] The liner 12 is one of the components constituting the container body of the tank body 11. It is a hollow component that divides the internal space and is cylindrical in this embodiment. The liner 12 has a main body 12a with a substantially constant diameter, and the openings at both ends thereof are narrowed by dome-shaped side ends 12b, and a joint 15 is disposed at the narrowed opening 12c.

[0022] The liner 12 can be made of any material as long as it can prevent the hydrogen contained in its internal space from leaking. The material can be a known material. Specifically, for example, it can be made of nylon resin, polyethylene synthetic resin, stainless steel, aluminum or other metal. Among them, from the perspective of lightweight, the material that constitutes the liner is preferably a synthetic resin.

[0023] The thickness of the liner 12 is not particularly limited, but is preferably 0.5 mm to 3.0 mm.

[0024] 1.2. Strengthening layer

[0025] The reinforcing layer 13 is one of the components constituting the container body, and is composed of multiple layers of laminated fibers impregnated with cured resin. The fiber layer is formed by winding fiber bundles to a predetermined thickness in multiple layers around the outer periphery of the liner 12. The thickness of the reinforcing layer 13 and the number of winding fiber bundles are determined according to the required strength, so there is no particular limitation, but it is about 10 mm to 30 mm.

[0026] [Fiber bundle]

[0027] The fiber bundle of the reinforcing layer 13 uses, for example, carbon fibers, and the fiber bundle is a band-shaped bundle of carbon fibers having a predetermined cross-sectional shape (e.g., a rectangular cross-sectional shape). Although not specifically limited, a cross-sectional shape of about 6 mm to 20 mm in width and about 0.1 mm to 0.3 mm in thickness can be cited. The amount of carbon fibers included in the fiber bundle is also not particularly limited, and for example, a case where the fiber bundle is composed of about 36,000 carbon fibers can be cited.

[0028] [Impregnation resin]

[0029] The resin impregnated in the fiber (fiber bundle) and cured in the reinforcing layer 13 is not particularly limited as long as it can improve the strength of the fiber. For example, a thermosetting resin cured by heat can be cited, specifically epoxy resin, unsaturated polyester resin, etc. containing an amine-based or anhydrous curing accelerator and a rubber-based reinforcing agent. In addition, a resin composition cured by mixing an epoxy resin as a main agent and a curing agent therein can also be cited. Accordingly, the resin composition as the mixture is automatically cured by reaching and penetrating the fiber layer during the period from mixing the main agent and the curing agent until curing.

[0030] 1.3. Protective layer

[0031] The protective layer 14 can be arranged as one of the components constituting the container body on the outer periphery of the reinforcement layer 13 as needed. When arranged, for example, glass fiber is wound and impregnated with resin. The impregnated resin can be considered in the same way as the reinforcement layer 13. Thus, the tank body 11 can be given impact resistance.

[0032] The thickness of the protective layer 14 is not particularly limited, and can be approximately 1.0 mm to 1.5 mm.

[0033] 1.4. Connectors

[0034] The joint 15 is a component installed at each of the two openings 12c of the liner 12, and is disposed at each of the two ends in the direction of the axis O of the liner 12. The joint 15 on one end side functions as an opening that communicates the inside and outside of the container body and is provided with an on-off valve 16. The joint 15 on the other end side is closed.

[0035] The member constituting the joint 15 is not particularly limited as long as it has required strength, and examples thereof include stainless steel and aluminum.

[0036] 1.5. Open and close valve

[0037] The on-off valve 16 is closed when the hydrogen cylinder 10 is not mounted on the hydrogen filling device 20 , and is opened by being pressed by a push rod (not shown) of the connecting device 25 when the hydrogen cylinder 10 is mounted on the hydrogen filling device 20 .

[0038] At the front end of the on-off valve 16, there is a connecting portion 16a connected to the hydrogen filling device 20 on the side connected to the hydrogen filling device 20. The connecting portion 16a is a portion that can engage and disengage the connecting portion 16a and the connecting device 25 of the hydrogen filling device 20. Its specific form is not limited. In this embodiment, a mechanical connection (mechanical interface) can be cited, wherein a mounting member that can be used to connect a shooting lens to a main body in a camera can be used. More specifically, a C-mount can be used. Therefore, in this embodiment, the hydrogen storage cylinder 10 is rotated around the axis O to connect the connecting portion 16a to the connecting device 55 of the hydrogen filling device 20.

[0039] 1.6. Shell

[0040] The housing 17 is a member that encloses the tank body 11 and forms the outer shell of the hydrogen cylinder 10 , and includes a box body 18 and a handle 19 .

[0041] The box 18 is a cylindrical member configured to accommodate the tank body 11. The box 18 has a hole 18a at a position facing the on-off valve 16 of the stored tank body 11, so that the on-off valve 16 can be accessed from the outside.

[0042] The handle 19 is an arched component disposed at the end of the tank body 11 opposite to the side where the opening and closing valve 16 is disposed in the box 18 . The user can hold the handle 19 to carry the hydrogen cylinder 10 and load and unload the hydrogen cylinder 10 to the hydrogen filling device 20 .

[0043] 1.7. Others

[0044] The allowable pressure of the tank body 11 is not particularly limited, but from the viewpoint of being relatively easy to carry and being able to store more hydrogen, a tank capable of storing hydrogen at an allowable pressure exceeding 20 MPa and not more than 70 MPa may be used.

[0045] 2. Structure of hydrogen filling device

[0046] Next, the structure of a hydrogen filling device according to one example will be described. Here, the above-mentioned hydrogen cylinder is filled with hydrogen, but the hydrogen tank to be filled with hydrogen is not limited to the above-mentioned hydrogen cylinder, and may be other known hydrogen tanks.

[0047] Figure 2 1 is a perspective view of the appearance of a hydrogen filling device 20 according to one embodiment. Figure 3 This is a diagram showing the internal structure of the hydrogen filling device 20, which is a perspective view of the hydrogen filling device 20 from above. Figure 2 The figure schematically shows the upper layer of the upper and lower two-layer storage section 21, Figure 4 is from Figure 3 1 is a diagram showing the hydrogen filling device 20 as viewed from the direction indicated by arrow VI, and is a diagram schematically showing the internal structure of the hydrogen filling device 20 as viewed from the back side.

[0048] The hydrogen filling device 20 is a device for filling hydrogen into the hydrogen cylinder 10. That is, the hydrogen filling device 20 is configured to be able to attach the hydrogen cylinder 10 that has consumed hydrogen and to be able to detach the hydrogen cylinder 10 after the hydrogen cylinder 10 has been filled with hydrogen.

[0049] Therefore, the hydrogen filling device 20 includes a storage unit 21 , a hydrogen supply unit 22 , a main pipe 23 , a hydrogen supply branch pipe 24 , a connection device 25 , a solenoid valve 26 , a valve 27 , a hydrogen discharge unit 28 , and a trap tank 30 .

[0050] The following is a detailed description.

[0051] [Storage Department]

[0052] The storage portion 21 is a portion for storing the hydrogen cylinder 10 when the hydrogen cylinder 10 is connected to the hydrogen filling device 20 . Figure 2 Schematically shows a situation where the hydrogen gas cylinder 10 is intended to be stored in one storage section 21 . Figure 3 , Figure 4 2 shows a state where the hydrogen gas cylinder 10 is mounted in all of the plurality of storage sections 21 arranged in parallel.

[0053] As can be seen from these figures, the storage section 21 is a space where the hydrogen cylinder 10 is placed, and is a space surrounded by inner walls having an opening 21a through which the hydrogen cylinder 10 can be stored and accessed. A connection device 25 is placed at the bottom of the storage section 21 on the opposite side of the opening 21a.

[0054] In the present embodiment, the storage section 21 has two upper and lower layers, and five storage sections 21 are provided in each layer, but the number of storage sections 21 is not particularly limited.

[0055] [Hydrogen supply unit]

[0056] The hydrogen supply unit 22 is a supply port for supplying hydrogen to be filled in the hydrogen cylinder 10 to the hydrogen filling device 20. Therefore, a connection member (also referred to as a nozzle) of a hydrogen supply pipe extending from a hydrogen supply device such as a hydrogen station is connected to the hydrogen supply unit 22. A typical form of the hydrogen supply unit 22 is a hydrogen filling port.

[0057] [Main piping]

[0058] The main pipe 23 is a pipe for supplying hydrogen from the hydrogen supply unit 22 to the hydrogen discharge unit 28 , and the hydrogen supply branch pipe 24 branches from the main pipe 23 .

[0059] Among them, a collection tank 30 is provided in the middle of the main pipe 23. The collection tank 30 will be described in detail later.

[0060] In addition, the main pipe 23 is provided with a pressure gauge 23a, and the internal pressure thereof can be known.

[0061] [Hydrogen supply branch pipe / connector]

[0062] The hydrogen supply branch pipe 24 is a pipe branched from the main pipe 23 and extending toward each storage section 21. The hydrogen supply branch pipe 24 is a pipe through which hydrogen filled in the hydrogen cylinder 10 flows, and supplies hydrogen to the connection device 25.

[0063] The connecting device 25 is arranged at the bottom of the storage part 21 in the hydrogen supply branch pipe 24 and is connected to the tank body 11 of the hydrogen storage cylinder 10. It is connected to the on-off valve 16 of the above-mentioned tank body 11, and operates the opening and closing of the on-off valve 16 of the tank body 11 to allow hydrogen to flow into the tank body 11.

[0064] In this embodiment, the connecting device 25 has a rod-shaped push rod (not shown) arranged in the storage portion 21. When the hydrogen storage cylinder 10 is stored in the storage portion 21, the push rod presses the valve core of the on-off valve 16, thereby opening the on-off valve 16 to allow hydrogen from the hydrogen supply branch pipe 24 to flow into the tank body 11.

[0065] In this embodiment, the connection device 25 has a connected portion (not shown) that engages with the connection portion 16a provided at the front end of the on-off valve 16. The shape of the connected portion is a shape suitable for the shape of the connection portion 16a.

[0066] [Solenoid valve]

[0067] The solenoid valve 26 is an on-off valve provided in each hydrogen supply branch pipe 24 and can be electromagnetically controlled to open and close. In this embodiment, the solenoid valve 26 is electrically connected to a control device such as a computer (not shown) and its opening and closing state is controlled based on a signal from the control device.

[0068] In this embodiment, the solenoid valve 26 is provided to switch the opening and closing of the hydrogen supply branch pipe 24, but the present invention is not limited to this. A push rod provided in the connecting device 25 may be electrically controlled to perform opening and closing control and also function as a solenoid valve.

[0069] [Valve / Hydrogen Exhaust Section]

[0070] The valve 27 is a switching valve provided in the main pipe 23, and hydrogen can be discharged to the outside from the hydrogen discharge part 28 by opening the valve 27. On the other hand, when the valve 27 is closed, the discharge of hydrogen to the outside from the hydrogen discharge part 28 is restricted.

[0071] The valve 27 may be a valve that can be opened and closed manually or a valve that is opened and closed by an electric signal. In the case of a valve that is opened and closed by an electric signal, the valve 27 may be electrically connected to a control device, and the open and closed state may be controlled by the control device.

[0072] [Catch tank]

[0073] The capture tank 30 is a tank arranged in series with the main pipe 23, and is arranged between the hydrogen supply unit 22 and the hydrogen supply branch pipe 24 closest to the hydrogen supply unit 22 (when the hydrogen supply unit 22 is regarded as the upstream side and the hydrogen discharge unit 28 is regarded as the downstream side, the hydrogen supply unit 22 is regarded as the most upstream side in consideration of the direction of hydrogen flow during hydrogen filling). That is, when hydrogen is filled into the hydrogen cylinders 10, the hydrogen supplied from the hydrogen supply unit 22 passes through the capture tank 30 and is distributed to each hydrogen cylinder 10 (hydrogen supply branch pipe 24).

[0074] At this time, according to Figure 4 It can be seen that the hydrogen supplied by the hydrogen supply unit 22 enters the capture tank 30 from the vertical lower side of the capture tank 30, flows out of the capture tank 30 from the vertical upper side, and is distributed to each hydrogen cylinder 10. Thus, the water mixed in the hydrogen is separated in the capture tank 30, and the mixing of the water into the hydrogen cylinder 10 can be suppressed.

[0075] Hereinafter, the structure of the collection tank 30 will be described in detail.

[0076] <Method 1>

[0077] Figure 5 A cross-sectional view of the capture tank 30 is shown in FIG. Figure 5 It can be seen that the collection tank 30 includes an inner layer 31 and an outer layer 32 constituting a container portion, a joint 33 is disposed in the container portion, and a drain pipe 34 is disposed at one of the joints 33 .

[0078] The inner layer 31 is one of the components constituting the container portion of the capture tank 30, and is a hollow component that partitions the internal space of the container. The specific shape and material can be considered in the same way as the liner 12 of the above-mentioned hydrogen cylinder 10. Therefore, the inner layer 31 also includes a main body 31a, a side end 31b, and an opening 31c.

[0079] The outer layer 32 is one of the components constituting the container part, and is formed by stacking fibers in multiple layers and impregnating the fibers with cured resin. The fiber layer is formed by winding fiber bundles in multiple layers to a predetermined thickness around the outer periphery of the inner layer 31. The thickness of the outer layer 32 and the number of windings of the fiber bundles are determined according to the required strength, so there is no particular limitation, but it is about 10 mm to 30 mm.

[0080] The specific structure of the fiber bundle and the impregnation resin can be considered in the same way as the reinforcing layer 13 of the hydrogen cylinder 10 described above.

[0081] The joint 33 is a component installed at each of the two openings 31c of the inner layer 31, and is arranged at each end of the inner layer 31 in the direction of the axis. Both joints 33 function as openings that communicate the inside and outside of the container (inner layer 31). Specifically, the main pipe 23 is arranged to pass through the joint 33, so that hydrogen fills the container and is discharged from the container.

[0082] Here, in the collection tank 30, one joint 33 is arranged vertically upward (above the paper) to constitute a hydrogen outflow outlet, and the other joint 33 is arranged vertically downward (below the paper) to constitute a hydrogen inflow inlet. In addition, the joint arranged at the bottom passes through the drain pipe 34 and communicates with the lower part of the container.

[0083] The member constituting the joint 33 is not particularly limited as long as it has required strength, and examples thereof include stainless steel, aluminum, and the like.

[0084] According to the hydrogen filling device 20 including the capture tank 30 of the present embodiment, the hydrogen cylinder 10 can be filled with hydrogen, for example, in the following manner.

[0085] In the initial state, the electromagnetic valve 26 (or electromagnetic push rod) and the valve 27 are in a closed position in the hydrogen filling device 20. If the control device receives a signal to install the hydrogen cylinder 10 to the hydrogen filling device 20 and connect the nozzle of the hydrogen supply device to the hydrogen supply unit 22 from this state, or if the control device receives a signal to start hydrogen filling after installation, the control device opens the electromagnetic valve 26 (or electromagnetic push rod).

[0086] Thus, hydrogen flows in from the hydrogen supply unit 22 , and hydrogen flows in the order of the main pipe 23 , the capture tank 30 , the main pipe 23 , and the hydrogen supply branch pipe 24 , so that the hydrogen cylinder 10 is filled with hydrogen.

[0087] Here, water attached to the hydrogen supply unit 22 on the hydrogen supply device side sometimes flows into the main pipe 23 together with hydrogen, but the water falls downward due to gravity inside the container portion (inner layer 31) of the capture tank 30 or adheres to the inner wall of the inner layer 31 (and then moves downward due to gravity to the inner layer 31), and the water is separated from the hydrogen and accumulated in the Figure 5 The lower part of the inner layer 31 is indicated by A in the figure. On the other hand, hydrogen flows out from the main pipe 23 provided at the joint 22 above toward each hydrogen cylinder 10. The accumulated water can be discharged by opening a drain valve (not shown) provided at the drain pipe 34.

[0088] In this way, by providing the capture tank 30 , water mixed in the hydrogen is separated from the hydrogen, and it is possible to suppress the water from being filled into the hydrogen cylinder 10 together with the hydrogen.

[0089] <Method 2>

[0090] Figure 6 2 shows a cross-sectional view of the second embodiment of the collection tank 40. Figure 6 It can be seen that the capture tank 40 includes an inner layer 31 and an outer layer 32 constituting a container portion, a joint 33 is arranged in the container portion, a drain pipe 34 is arranged at one of the joints 33, and includes a gas-liquid separation wall 41 and a spiral flow path forming member 42. Since the inner layer 31, the outer layer 32, the joint 33 and the drain pipe 34 can be considered in the same way as the above-mentioned capture tank 30, the same reference numerals are given and the description is omitted.

[0091] The gas-liquid separation wall 41 is a cylindrical component disposed inside the inner layer 31, and is disposed substantially coaxially with the cylindrical inner layer 31. The gas-liquid separation wall 41 is provided with numerous holes on its wall surface that connect the inside and outside of the cylinder, and a predetermined gap B is formed between the outer surface of the gas-liquid separation wall 41 and the inner surface of the inner layer 31. Therefore, the gas-liquid separation wall 41 can be composed of, for example, punched metal or the like.

[0092] The upper end of the gas-liquid separation wall 41 is preferably in a closed state in contact with the inner surface of the inner layer 31. This prevents the water separated and reaching the inner surface of the inner layer 31 from moving and flowing out of the main pipe 23 of the joint 33 above the collection tank 40.

[0093] The spiral flow path forming component 42 is arranged in the cylinder of the gas-liquid separation wall 41, and is a component that forms a spiral flow path in the cylinder for hydrogen flowing from the main pipe 23 arranged at the joint 33 arranged at the bottom to the inside of the inner layer 31 toward the main pipe 23 arranged at the joint 33 arranged at the top.

[0094] Therefore, in this embodiment, the spiral flow path forming member 42 includes a core material 43 and a guide plate 44 .

[0095] The core material 43 is a cylindrical member having a columnar shape or a cylindrical member with both bottoms closed, and its axis is arranged to be substantially coaxial with the axis of the inner layer 31 .

[0096] The guide plate 44 is a plate member erected from the outer periphery of the core material 43. Figure 6 It is understood that the guide plates 44 are arranged so as to be spirally wound around the core material 43 along the outer periphery and the axis of the core material 43. Thus, a spiral flow path having a predetermined interval (width) in the axial direction of the guide plates 44 is formed.

[0097] According to the hydrogen filling device 20 including the capture tank 40 of the present embodiment, the hydrogen cylinder 10 can be filled with hydrogen, for example, in the following manner.

[0098] In the initial state, the electromagnetic valve 26 (or electromagnetic push rod) and the valve 27 are in a closed position in the hydrogen filling device 20. If the control device receives a signal indicating that the hydrogen cylinder 10 is installed in the hydrogen filling device 20 and the nozzle of the hydrogen supply device is connected to the hydrogen supply unit 22 from this state, or the control device receives a signal to start hydrogen filling after installation, the control device opens the electromagnetic valve 26 (or electromagnetic push rod).

[0099] Thus, hydrogen flows in from the hydrogen supply unit 22 , and fills the hydrogen cylinder 10 with hydrogen via the main pipe 23 , the capture tank 40 , the main pipe 23 , and the hydrogen supply branch pipe 24 .

[0100] Here, water adhering to the hydrogen supply unit 22 on the hydrogen supply device side may flow into the main pipe 23 together with hydrogen. In this regard, the capture tank 40 functions as follows.

[0101] If hydrogen (mixed with water) flows into the inner layer 31 from the main pipe 23 equipped at the joint 33 arranged at the bottom, the hydrogen rises in a spiral manner in the axial direction of the inner layer 31 along the flow path formed in the spiral flow path forming component 42, and flows out from the main pipe 23 equipped at the joint 33 arranged at the top. At this time, due to the spiral flow, centrifugal force is applied in a direction orthogonal to the axis (radial direction of the inner layer 31), and the water with large mass moves outward and directly moves to the hole of the gas-liquid separation wall 41, or adheres to the wall of the gas-liquid separation wall 41 and then moves downward along the wall of the gas-liquid separation wall 41 to the hole of the gas-liquid separation wall 41 due to gravity, and is finally retained in the hole. The water retained in the hole is pushed by the hydrogen that also moves outward due to the centrifugal force and falls off from the hole (gas-liquid separation wall 41) and reaches the wall of the inner layer 31. Due to gravity, it moves downward in the gap B along the wall surface of the inner layer 31 and accumulates in Figure 5The lower part of the inner layer 31 is indicated by A. The accumulated water can be drained by opening a drain valve (not shown) provided in the drain pipe 34.

[0102] By providing the capture tank 40 in this manner, water contained in hydrogen can be more reliably separated from hydrogen, and it is possible to suppress water from being filled into the hydrogen cylinder 10 together with hydrogen.

[0103] In the present embodiment, the embodiment in which the gas-liquid separation wall 41 is provided is described. However, even if the gas-liquid separation wall 41 is not provided, the effect can be achieved by the movement of water along the inner surface of the inner layer 31 .

[0104] Description of reference numerals:

[0105] 10…hydrogen gas cylinder (hydrogen tank); 11…tank body; 12…lining; 13…reinforcement layer; 14…protective layer; 15…connector; 16…opening and closing valve; 17…shell; 20…hydrogen filling device; 21…storage unit; 22…hydrogen supply unit; 23…main pipe; 24…hydrogen supply branch pipe; 25…connecting device; 26…solenoid valve; 27…valve; 28…hydrogen discharge unit; 30…capture tank; 40…capture tank.

Claims

1. A hydrogen filling device for filling hydrogen into a plurality of hydrogen tanks, wherein: have: Hydrogen supply department; a capture tank through which the hydrogen supplied from the hydrogen supply unit passes; a main pipe extending from the capture tank; and The hydrogen supply branch pipe is a pipe extending from the main pipe to the hydrogen tank. The capture tank has: Container Department; an inlet for allowing hydrogen to flow from the hydrogen supply unit into the container unit; and The outflow port is provided vertically above the inflow port and allows hydrogen to flow out from the container portion to the main pipe.

2. The hydrogen filling device according to claim 1, wherein: A flow path extending spirally from the inlet toward the outlet is provided in the container portion.

3. The hydrogen filling device according to claim 2, wherein: A porous wall is provided on the outer periphery of the spirally extending flow path.

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