JP6927841B2 - Fuel cell vehicle discharge device - Google Patents

Description

The present invention relates to a fuel cell vehicle discharge device that discharges off-gas of a fuel cell into the atmosphere.

In recent years, for example, a fuel cell vehicle powered by a fuel cell that generates electricity by chemically reacting hydrogen with oxygen in the air, as in Patent Document 1, has been put into practical use. From such a fuel cell, off-gas containing water (hereinafter referred to as produced water), which is a product of a chemical reaction between hydrogen and oxygen, in the state of water vapor is discharged.

Japanese Unexamined Patent Publication No. 2000-182637

By the way, when the above-mentioned off-gas is discharged into the atmosphere as it is, the water vapor contained in the off-gas is cooled to form white mist around the rear of the vehicle. Therefore, in a fuel cell vehicle, a fuel cell vehicle discharge device is provided with a gas-liquid separation unit that separates water vapor from the off-gas by liquefying the water vapor contained in the off-gas in a storage chamber accommodating a power train or the like. Is installed. Then, such a fuel cell vehicle discharge device is required to prevent the liquid generated water liquefied by the gas-liquid separation unit from scattering to the rear of the vehicle.

An object of the present invention is to provide a fuel cell vehicle discharge device that effectively suppresses the generated water liquefied by the gas-liquid separation unit from being scattered behind the vehicle.

The exhaust device for a fuel cell vehicle that solves the above problems is a gas-liquid separation unit that separates the water vapor from the off-gas by liquefying the water vapor contained in the off-gas from the fuel cell, and an elastic drain hose. The drain hose attached to the gas-liquid separation unit and having a drain port for discharging the liquefied generated water at a tip portion extending downward of the vehicle, and an elastic guard member, the drain port. The drain hose is the rear end of the vehicle at the opening end forming the drain, comprising the guard member that hangs behind the drain and covers the space below the drain from the rear. The end portion is in contact with the guard member in a state of being compressed and deformed when the vehicle is stopped.

According to the above configuration, even if the guard member flutters backward due to the running wind, the contact state between the open end of the drain hose and the guard member is likely to be maintained due to the elastic deformation of the rear end of the drain hose. As a result, the guard member is held at a position closer to the drain port, so that the generated water discharged from the drain port can be more reliably received by the guard member. As a result, it is possible to effectively suppress the scattering of the generated water to the rear of the vehicle.

In the fuel cell vehicle discharge device having the above configuration, the drain port extends in a plane direction orthogonal to the vertical direction of the vehicle, or in a plane direction obliquely downward on the rear side with respect to the plane direction. preferable.

According to the above configuration, the generated water adhering to the inner peripheral surface of the drain hose at the tip of the drain hose can travel along the inner peripheral surface without resisting gravity and move to the rear side. As a result, even when the amount of generated water discharged is small, for example, when traveling at low speed, the generated water can be discharged from a position closer to the guard member. Such an effect becomes remarkable because the drainage port extends in the direction of the inclined surface.

The fuel cell vehicle discharge device having the above configuration includes a guard mounting portion for attaching the guard member to the gas-liquid separation unit, and the guard mounting portion is a bracket connected to the gas-liquid separation unit and is the vehicle. The bracket has an oblique angle setting plate extending diagonally downward on the front side of the hose, and a support plate that supports the upper end portion of the guard member by sandwiching the bevel angle setting plate. In the stopped state of the vehicle, the lower end portion is displaced toward the rear side of the vehicle with respect to the extending direction of the bevel angle setting plate due to the contact of the drain hose with the rear end portion. preferable.

According to the above configuration, the guard member sandwiched between the bevel angle setting plate and the support plate of the bracket is elastically deformed so as to displace the lower end portion toward the front of the vehicle by abutting with the rear end portion of the drain hose. It is in a state. As a result, the amount of the guard member fluttering backward due to the running wind can be reduced. As a result, it is possible to further suppress the generated water from scattering to the rear of the vehicle.

In the fuel cell vehicle discharge device having the above configuration, it is preferable that the guard mounting portion includes a hose retainer that is connected to the support plate and presses the tip end portion of the drain hose from the front side of the vehicle.

According to the above configuration, the tip of the drain hose is pressed to the rear of the vehicle by the hose retainer. As a result, the misalignment of the drainage port is suppressed, so that even if vibrations occur in the vehicle due to running, for example, the state in which the rear end portion of the drainage hose and the guard member are in contact with each other can be easily maintained.

In the fuel cell vehicle discharge device having the above configuration, the guard member is composed of a rubber mat and a resin mat that overlaps the rear surface of the rubber mat and has higher elasticity than the rubber mat, and the lower end portion of the rubber mat is the lower end portion of the resin mat. It is preferably located below the portion.

According to the above configuration, since the guard member is provided with the resin mat, the amount of fluttering of the guard member due to the running wind is suppressed, and even if the guard member comes into contact with the running surface, for example, when approaching an uphill, the rubber mat contacts. The state of doing is maintained. Therefore, it is possible to reduce the frictional noise when the guard member is in contact with the traveling surface.

A perspective view schematically showing a schematic configuration of a vehicle equipped with an embodiment of a fuel cell vehicle discharge device. The rear perspective view which shows an example of the gas-liquid separation unit. The front perspective view which shows an example of the gas-liquid separation unit. FIG. 2 is a cross-sectional view showing a cross section taken along line 4-4 of FIG. 2 together with a schematic flow of off-gas and liquid water in the gas-liquid separation unit. The perspective view which shows an example of the connection state of a gas-liquid separation unit and an undercover. The side view which shows an example of the state which the gas-liquid separation unit is mounted on a vehicle. The side view which shows an example of the discharge device for a fuel cell vehicle in the vicinity of a drain hose. The perspective view which shows an example of the discharge device for a fuel cell vehicle in the vicinity of a drain hose. It is a side view which shows an example of the discharge device for a fuel cell vehicle in the vicinity of a drain hose, and is schematically an example of a state in which liquid water is discharged from a drain port in a state where the guard member is fluttering under the influence of a running wind. The figure which shows. A side view schematically showing an example of the flow of liquid water near the drain port.

An embodiment of the fuel cell vehicle discharge device will be described with reference to FIGS. 1 to 10.
As shown in FIG. 1, a vehicle 10 of a shared vehicle, which is an example of a fuel cell vehicle (FCV), is a fuel generated by chemically reacting hydrogen stored in a hydrogen tank with oxygen in the air. The battery 11 is mounted on the upper rear part of the vehicle. In the fuel cell 11, off-gas containing water vapor produced by a chemical reaction between hydrogen and oxygen is discharged. The off-gas is discharged into the atmosphere through a pair of left and right fuel cell vehicle discharge devices 20 (hereinafter, simply referred to as discharge devices 20) located behind the rear wheels 13 of the vehicle 10.

Hereinafter, the discharge device 20 will be described, but each discharge device 20 has the same basic structure except that the mounting position with respect to the vehicle is different. Therefore, the discharge device 20 located on the right side in the forward direction will be described in detail, and the detailed description of the discharge device 20 located on the left side in the forward direction will be omitted. Further, the outer direction of the vehicle 10 in the width direction of the vehicle 10 is referred to as the outer side, and the inner direction is referred to as the inner side.

(Outline of discharge device 20)
The discharge device 20 includes a duct 21, a gas-liquid separation unit 22, an undercover 23, and a guard member 24. The duct 21 is composed of a metal pipe, a flexible resin hose, or the like. The duct 21 extends downward from the fuel cell 11 and connects the fuel cell 11 and the gas-liquid separation unit 22. The gas-liquid separation unit 22 separates water vapor from the off-gas by liquefying the water vapor contained in the off-gas, and discharges the liquefied liquid generated water (hereinafter referred to as liquid water) and the off-gas into the atmosphere. The gas-liquid separation unit 22 is a space for accommodating a power train 14 having a battery, a motor, and the like, and is arranged in an accommodating chamber 15 located at the lower rearmost part of the vehicle 10.

The undercover 23 has a function as a fixture for attaching the gas-liquid separation unit 22 to the vehicle 10. The undercover 23 is inclined so as to be located downward toward the front portion of the vehicle 10, and covers the opening portion of the accommodation chamber 15 around the gas-liquid separation unit 22. The inclination angle of the undercover 23 is set to be substantially equal to the angle of the departure angle of the vehicle 10. The guard member 24 prevents the liquid water discharged from the gas-liquid separation unit 22 from scattering to the rear of the vehicle 10. Details of the guard member 24 will be described later.

(Overview of gas-liquid separation unit)
The outline of the gas-liquid separation unit 22 will be described with reference to FIGS. 2 to 4.
As shown in FIGS. 2 and 3, the gas-liquid separation unit 22 is made of aluminum, which has high thermal conductivity and excellent water resistance among metals so that steam can be liquefied efficiently. ing. The gas-liquid separation unit 22 has an upper housing 30 and a lower housing 50. The upper housing 30 has a front wall 31, an upper wall 32, a rear wall 33, and an inner side wall 34 and an outer wall 35 forming a pair of side walls, and is flattened so as to extend in the front-rear direction and the up-down direction of the vehicle 10. It is formed in a box shape. A duct 21 is connected to the rear wall 33 of the upper housing 30, and a discharge portion 37 that discharges off-gas into the upper housing 30 is attached. The lower housing 50 has a front wall 51, an upper wall 52, a rear wall 53, an inner side wall 54 and an outer wall 55 forming a pair of side walls, and a lower wall 56, and has a front-rear direction and a width direction of the vehicle 10. It is formed in a flat box shape that spreads out.

As shown in FIG. 4, in the upper housing 30, the lower ends of the front wall 31, the rear wall 33, the inner side wall 34, and the outer wall 35 are attached to the upper wall 52 of the lower housing 50. The upper housing 30 has an upper chamber 38 which is a space surrounded by a front wall 31, an upper wall 32, a rear wall 33, an inner side wall 34, an outer wall 35, and a part of the upper wall 52 of the lower housing 50. A part of the upper wall 52 of the lower housing 50 functions as a lower wall of the upper housing 30 and constitutes the lower surface 36s of the upper chamber 38. The lower surface 36s is inclined so that the portion closer to the front of the vehicle 10 is located below the vehicle 10. The discharge portion 37 has a tubular shape and is supported by the rear wall 33 in a state of penetrating the support hole 39 formed in the rear wall 33. The discharge portion 37 extends diagonally downward toward the first communication port 60, which will be described later, along the normal direction of the rear wall 33, has an introduction port 40 outside the upper chamber 38, and has an introduction port 40 of the upper chamber 38. It has a discharge port 41 inside. In the discharge unit 37, the axial direction at the formed portion of the discharge port 41 is set to the discharge direction.

The upper housing 30 has a first guide plate 71 that guides the off gas discharged from the discharge portion 37 upward in the upper chamber 38, and a second guide plate 71 that guides the off gas guided by the first guide plate 71 to the rear of the vehicle 10. It has a guide plate 72. Further, the upper housing 30 is located between the first communication port 60 and the second communication port 61, and the space closer to the lower surface 36s of the upper chamber 38 is arranged in the front-rear direction of the vehicle 10 in the first space 38A and the second space. It has an upper partition plate 74 that partitions the 38B.

The lower housing 50 has a lower chamber 58 which is a space surrounded by a front wall 51, an upper wall 52, a rear wall 53, an inner side wall 54, an outer wall 55, and a part of the lower wall 56. The lower surface 56s of the lower chamber 58 is inclined so that the portion closer to the front of the vehicle 10 is located below the vehicle 10. On the upper wall 52 of the lower housing 50, a first communication port 60 is formed at the front end portion as a communication port for communicating the upper chamber 38 and the lower chamber 58, and the discharge portion 37 is located closer to the rear wall 53. A second communication port 61 is formed below. Further, the lower housing 50 is divided into a first lower chamber 58A communicating with the upper chamber 38 through the first communication port 60 and a second lower chamber 58B communicating with the upper chamber 38 through the second communication port 61 in the lower chamber 58. It has a lower partition plate 91 that partitions the lower chamber 58.

A sleeve 62 communicating with the lower chamber 58 is attached to the front wall 51 of the lower housing 50 at an end on the outer wall 55 side. A drain hose 63 is attached to the sleeve 62. The drain hose 63 is an elbow-shaped elastic member having a base end portion extending forward of the vehicle 10 and a tip end portion extending downward of the vehicle 10, and the base end portion is attached to the sleeve 62 by a hose cap 63C. The drain hose 63 forms a drain port 64 that communicates the lower chamber 58 with the external space of the gas-liquid separation unit 22 at an open end portion that is an end edge portion at the tip portion. Further, the drain hose 63 is located behind the rear wheel 13 so that the liquid water discharged from the drain port 64 is less likely to be affected by the running wind. The drainage port 64 is located in the plane direction orthogonal to the vertical direction of the vehicle 10, or is downward toward the rear end portion 64A, which is the rear end of the vehicle 10 among the open ends forming the drainage port 64. It extends in the direction of the surface that slopes diagonally downward on the rear side so that it is located.

The lower wall 56 of the lower housing 50 is formed with an exhaust port 65 at the rear end portion that communicates the lower chamber 58 with the external space of the gas-liquid separation unit 22. The exhaust port 65 is located behind the vehicle 10 with respect to the second communication port 61. Further, the lower wall 56 has an inner flange portion 56a protruding from the inner side wall 54 toward the inside of the vehicle and an outer collar portion 56b protruding from the outer wall 55 toward the outside of the vehicle. Each of the inner flange portion 56a and the outer flange portion 56b is formed with an attachment portion 66 for attaching the gas-liquid separation unit 22 to the undercover 23. The gas-liquid separation unit 22 is supported by the vehicle 10 via the undercover 23, so that the upper wall 52 and the lower wall 56 of the lower housing 50 are inclined so as to be located downward toward the front portion of the vehicle 10. It is mounted on the vehicle in the state. The lower wall 56 of the lower housing 50 may be a part of the undercover 23. In this case, the number of parts is reduced, the inner flange portion 56a is formed on the inner side wall 54, and the outer flange portion 56b is formed on the outer wall 55.

When the gas-liquid separation unit 22 is mounted on the vehicle 10, the duct 21 is connected to the discharge portion 37. The discharge portion 37 and the duct 21 are connected by fastening the overlapping portion between the discharge portion 37 and the duct 21 with a fastener while the discharge portion 37 is located inside the duct 21. In addition to off-gas containing water vapor, for example, generated water liquefied while passing through the duct 21 flows into the gas-liquid separation unit 22 as liquid water. The gas-liquid separation unit 22 mainly liquefies water vapor in the upper chamber 38, and separately guides each of the liquid water and the off-gas to the drain port 64 and the exhaust port 65 in the lower chamber 58. Then, the gas-liquid separation unit 22 discharges liquid water from the drain port 64 toward the lower side of the vehicle 10, and discharges off gas diagonally downward from the exhaust port 65 toward the rear of the vehicle 10.

(Undercover 23)
As shown in FIG. 5, the gas-liquid separation unit 22 is attached to the undercover 23 via the attachment portions 66 formed on the inner flange portion 56a and the outer flange portion 56b, respectively. The undercover 23 is made of aluminum, which has high thermal conductivity and excellent water resistance among metals. The undercover 23 has an under panel 95, a back panel 96B, and a side panel 96S. The gas-liquid separation unit 22 is attached to the under panel 95 and covers the periphery of the gas-liquid separation unit 22 from below. The back panel 96B is integrally connected to the rear end edge of the under panel 95 and covers the gas-liquid separation unit 22 from the rear. The side panel 96S is integrally connected to the outer edge of the under panel 95 and covers the gas-liquid separation unit 22 from the outside.

As shown in FIG. 6, the undercover 23 has an inclination angle θd (on a horizontal traveling surface 99) of a virtual line VLd in which the under panel 95 indicates the departure angle of the vehicle 10 in a plan view from the outside of the vehicle 10. On the other hand, it is attached to the vehicle 10 in a state of being inclined so that the portion closer to the front of the vehicle 10 is located below the vehicle 10 by the angle formed by the virtual line VLd). When the gas-liquid separation unit 22 is attached to the vehicle 10 via such an undercover 23, the gas-liquid separation unit 22 is in a forward leaning posture, and drainage of liquid water through the drain hose 63 is promoted. The under panel 95 covers the lower opening 16 of the accommodation chamber 15 around the gas-liquid separation unit 22, and has an exhaust opening (not shown) arranged so as to surround the exhaust port 65 of the gas-liquid separation unit 22. Have.

Here, although various devices arranged in the accommodation chamber 15 are provided with measures against moisture from above the vehicle 10 such as rainwater, they are emitted from below the vehicle 10 like water vapor contained in off-gas. Measures against moisture may not be sufficient. Therefore, when the off gas containing water vapor is discharged from the exhaust port 65 when the vehicle 10 is stopped, if the off gas containing the water vapor enters the accommodation chamber 15, the water vapor may condense in various devices. There is. In this regard, the discharge device 20 has an undercover 23 that covers the lower opening 16 of the storage chamber 15 around the gas-liquid separation unit 22. By disposing such an undercover 23, it is possible to prevent off-gas containing water vapor discharged from the exhaust port 65 from entering the accommodation chamber 15 when the vehicle 10 is stopped.

(Guard member 24)
As shown in FIGS. 7 and 8, the guard member 24 is composed of two rectangular plate-shaped elastic members. The guard member 24 is composed of a rubber mat 101, which is a low-elasticity plate that is located in the front and has low elasticity, and a resin mat 102, which is a high-elasticity plate that overlaps the rubber mat 101 from the rear and has higher elasticity than the low-elasticity plate. It is configured. The rubber mat 101 is made of, for example, EPDM (Ethylene Propylene Diene Rubber), and the resin mat 102 is made of, for example, EVA (Ethylene Vinyl Acetate) resin. The lower end 101B of the rubber mat 101 and the lower end 102B of the resin mat 102 are located below the virtual line VLd indicating the departure angle of the vehicle 10 in a plan view from the outside of the vehicle 10. The lower end portion 101B of the rubber mat 101 is located below the lower end portion 102B of the resin mat 102, and is located at a position away from the horizontal traveling surface 99 by the height H. The height H is preferably set based on an experiment or the like for investigating the scattering of liquid water in an actual vehicle, and an example of the height H is 80 mm.

The guard member 24 is attached to the gas-liquid separation unit 22 via the under panel 95. The guard member 24 is attached to the under panel 95 via the guard mounting portion 103. The guard mounting portion 103 is located above the virtual line VLd indicating the departure angle of the vehicle 10, and is composed of a plurality of metal materials. The guard mounting portion 103 includes a bracket 104 fixed to the under panel 95, a support plate 107 that supports the upper end 101T of the rubber mat 101 and the upper end 102T of the resin mat 102 by sandwiching the bracket 104, and a support plate on the bracket 104. It has a fastening member 109 for fastening 107.

The bracket 104 extends in the width direction of the vehicle 10 as a whole, and has a fixing plate portion 105 fixed to the lower surface of the under panel 95 and a tip portion of the fixing plate portion 105 diagonally upward on the rear side of the vehicle 10. It is a member in which the bevel setting plate portion 106 extending toward the direction is integrally connected.
The fixing plate portion 105 extends below the sleeve 62 toward the front of the vehicle 10 from a portion fixed to the under panel 95. The bevel angle setting plate portion 106 is located in front of the vehicle 10 with respect to the hose cap 63C and diagonally upward on the rear side with respect to the drainage port 64, and is an insertion hole through which the base end portion of the drainage hose 63 is inserted (not shown). have. The bevel angle setting plate portion 106 is arranged so as to incline diagonally downward on the front side of the vehicle 10 toward the rear end portion 64A of the drain hose 63 from a position diagonally upward on the rear side with respect to the drain port 64.

The support plate 107 extends in the width direction of the vehicle 10 as a whole, and an insertion hole 108 through which the drain hose 63 is inserted is formed. The support plate 107 is fastened to the bevel angle setting plate 106 of the bracket 104 by the fastening member 109 while sandwiching the upper end 101T of the rubber mat 101 and the upper end 102T of the resin mat 102. As a result, the rubber mat 101 and the resin mat 102 are supported in a state of extending diagonally downward on the front side of the vehicle 10 toward the rear end portion 64A of the drain hose 63. Further, the support plate 107 is provided with a hose retainer 110 having a semicircular shape that projects forward of the vehicle 10. The hose retainer 110 is joined to both sides of the insertion hole 108 and spans the insertion hole 108, and presses the tip of the drain hose 63 from the front side of the vehicle 10 to the rear side of the vehicle 10 to drain water. The tip of the hose 63 is restricted from being displaced forward of the vehicle 10. The upper end 101T of the rubber mat 101 and the upper end 102T of the resin mat 102 are formed with fastening holes (not shown) through which the fastening member 109 is inserted. These fastening holes also function as positioning of the rubber mat 101 and the resin mat 102.

When the vehicle 10 is stopped, the guard member 24 comes into contact with the rear end 64A, which is the rear end of the vehicle 10 among the open ends forming the drain port 64, below the support plate 107. Due to the contact between the drain hose 63 and the guard member 24, the drain hose 63 supports the rubber mat 101 of the guard member 24 in a state where the rear end portion 64A is compressed and deformed. Further, the guard member 24 is elastically deformed so as to hang downward from the vehicle 10 with the upper end portions 101T and 102T sandwiched between the bevel angle setting plate portion 106 and the support plate 107 as fulcrums, that is, the lower end portion 101B. , 102B is elastically deformed so as to be displaced forward of the vehicle 10 to support the rear end portion 64A of the drain hose 63.

As shown in FIG. 9, when the vehicle 10 is traveling, the guard member 24 is elastically deformed by a fluttering amount L so that the lower end portions 101B and 102B are displaced toward the rear of the vehicle 10 under the influence of the traveling wind 111. Then, while the vehicle 10 is traveling, the liquid water W discharged from the drain hose 63 of the gas-liquid separation unit 22 moves relative to the rear of the vehicle 10 due to inertia and traveling wind 111 accompanying the traveling, thereby moving to the guard member 24. It will be accepted. The liquid water W received by the guard member 24 flows down the vehicle 10 through the guard member 24, and then falls from the guard member 24 and reaches the traveling surface 99. The guard member 24 and the rear end portion 64A of the drain hose 63 are in contact with each other in a state where the rear end portion 64A is compressed and deformed while the vehicle 10 is stopped. Therefore, even if the guard member 24 is fluttered by the traveling wind, the contact state between the guard member 24 and the rear end portion 64A can be easily maintained. The guard member 24 and the rear end portion 64A of the drain hose 63 overlap with each other by several millimeters when the vehicle 10 is stopped so that the contact state is maintained even when the vehicle 10 travels at the legal maximum speed on a general road. It is preferable that the components are arranged in such a manner.

According to the fuel cell vehicle discharge device 20 of the above embodiment, the following effects can be obtained.
(1) When the vehicle 10 is stopped, the rear end portion 64A of the drain hose 63 is in contact with the guard member 24 in a compressed and deformed state. Therefore, even if the guard member 24 flutters while the vehicle 10 is traveling, the contact state between the drain hose 63 and the guard member 24 is likely to be maintained by opening the compression deformation portion of the rear end portion 64A. As a result, the guard member 24 can be held at a position closer to the drain port 64 not only when the vehicle 10 is stopped but also when the vehicle 10 is running, and the liquid water discharged from the drain port 64 can be held. It can be more reliably received by the guard member 24. As a result, it is possible to effectively prevent the liquid water from scattering to the rear of the vehicle 10.

(2) As shown in FIG. 10, the drainage port 64 extends in a plane direction orthogonal to the vertical direction of the vehicle 10 or in a plane direction inclined rearward and downward with respect to the plane direction. Therefore, as shown by the arrow 112, the water droplets of the liquid water adhering to the inner peripheral surface of the drain hose 63 move to the rear end portion 64A side without resisting gravity on the inner peripheral surface of the drain hose 63. Can be done. As a result, even when the amount of liquid water drained is small, for example, when traveling at low speed, the liquid water can be discharged from a position closer to the guard member 24 through the drain port 64. It is preferable that the inclination angle θa with respect to the plane direction orthogonal to the vertical direction of the vehicle 10 is about 10 ° or less. According to such a configuration, the intrusion of the traveling wind into the drain hose 63 is suppressed, so that the turbulence of the liquid water in the drain hose 63 due to the traveling wind is suppressed.

(3) The guard member 24 sandwiched between the bevel setting plate portion 106 of the bracket 104 and the support plate 107 comes into contact with the rear end portion 64A of the drain hose 63, and the extension direction of the bevel setting plate portion 106. The lower ends 101B and 102B are in an elastically deformed state in which the lower ends 101B and 102B are displaced to the rear side of the vehicle 10. That is, the guard member 24 is in an elastically deformed state in which the lower end portions 101B and 102B are displaced toward the front of the vehicle 10 by abutting with the rear end portion 64A of the drain hose 63. As a result, the amount of fluttering L of the guard member 24 to the rear due to the traveling wind 111 can be reduced. As a result, it is possible to more effectively suppress the liquid water W from scattering to the rear of the vehicle 10.

(4) The tip of the drain hose 63 is pressed to the rear of the vehicle 10 by the hose retainer 110. As a result, the misalignment of the drainage port 64 is suppressed, so that even if vibration occurs in the vehicle 10 due to running, for example, the state in which the rear end portion 64A of the drainage hose 63 and the guard member 24 are in contact with each other is maintained. It will be easier.

(5) The guard member can also be composed of one plate-shaped elastic member. Such a guard member requires an elastic plate having high elasticity in order to reduce the amount of fluttering. However, although the elastic plate having high elasticity can suppress the amount of fluttering, when the guard member comes into contact with the traveling surface, for example, when approaching an uphill, a loud friction noise is generated. In this respect, the guard member 24 is composed of a rubber mat 101 which is a low elastic plate and a resin mat 102 which is a high elastic plate overlapping the rear surface of the rubber mat 101, and the lower end portion 101B of the rubber mat 101 is the lower end portion of the resin mat 102. It is located below 102B. According to such a configuration, since the guard member 24 is provided with the resin mat 102 as a highly elastic plate, the amount of fluttering L of the guard member 24 due to the traveling wind 111 can be suppressed. Further, even if the guard member 24 comes into contact with the traveling surface when approaching an uphill, the rubber mat 101 comes into contact with the resin mat 102 in advance, and the traveling surface and the rubber mat 101 are maintained in contact with each other. As a result, the friction noise when the guard member 24 is in contact with the traveling surface can be reduced.

(6) The guard member 24 is composed of a rubber mat 101, a resin mat 102, and these two elastic members, and has lower end portions 101B and 102B below the virtual line VLd indicating the departure angle of the vehicle 10. There is. As a result, the guard member 24 can be installed at a position where the guard member 24 discharges the liquid water, that is, the lower end portion 101B can be installed at a lower position while avoiding the guard member 24 from obstructing the running of the vehicle 10. As a result, it is possible to further suppress the scattering of liquid water behind the vehicle 10.

The above embodiment can be modified as appropriate and implemented as follows.
The guard member 24 may be made of an elastic member, and may be made of, for example, one resin mat 102. Even with such a configuration, it is possible to obtain an effect similar to the effects described in (1) to (4) above.

The guard member 24 may have the lower end 101B of the rubber mat 101 and the lower end 102B of the resin mat 102 located at the same height. Even with such a configuration, it is possible to obtain an effect similar to the effects described in (1) to (4) above.

The guard mounting portion 103 does not have to include the hose retainer 110 connected to the support plate 107. Even with such a configuration, it is possible to obtain an effect similar to the effects described in (1) to (3) above.

The drain hose 63 may be in contact with the guard member 24 in a state where the rear end portion 64A of the drain hose 63 is compressed and deformed. Therefore, the drainage port 64 may extend in the direction of the inclined surface so as to be located below the vehicle 10 toward the front portion of the vehicle 10. Even with such a configuration, an effect similar to the effect described in (1) above can be obtained.

The lower end of the guard member 24 may be located above the virtual line VLd.
The guard member 24 may cover the space below the drain port 64 from the rear of the vehicle 10 in a plan view from the rear of the vehicle 10. Therefore, the guard member 24 may protrude inward of the vehicle 10 from, for example, the rear wheel 13.

-The arrangement position of the drain port 64 can be changed according to the design items of each vehicle. For example, the drainage port 64 may be arranged not only behind the rear wheel 13 of the vehicle 10, but also behind, for example, the front wheel, or near the center in the width direction of the vehicle 10.

-The drain hose 63 may have a tip having a drain port 64 extending downward of the vehicle 10. Therefore, the drain hose 63 is not limited to the one having an elbow shape, and may have a tubular shape extending downward from the vehicle 10, for example.

10 ... Vehicle, 11 ... Fuel cell, 13 ... Rear wheel, 14 ... Power train, 15 ... Containment chamber, 16 ... Lower opening, 20 ... Fuel cell vehicle discharge device, 21 ... Duct, 22 ... Gas-liquid separation unit , 23 ... Undercover, 24 ... Guard member, 24a ... Lower end, 30 ... Upper housing, 31 ... Front wall, 32 ... Upper wall, 33 ... Rear wall, 34 ... Inner side wall, 35 ... Outer wall, 36s ... Lower surface, 37 ... Discharge section, 38 ... Upper chamber, 38A ... First space, 38B ... Second space, 39 ... Support hole, 40 ... Introduction port, 41 ... Discharge port, 50 ... Lower housing, 51 ... Front wall, 52 ... Upper Wall, 53 ... Rear wall, 54 ... Inner side wall, 55 ... Outer wall, 56 ... Lower wall, 56a ... Inner collar, 56b ... Outer collar, 56s ... Lower surface, 58 ... Lower chamber, 58A ... First lower chamber, 58B ... 2nd lower chamber, 60 ... 1st communication port, 61 ... 2nd communication port, 62 ... sleeve, 63 ... drain hose, 63C ... hose cap, 64 ... drain port, 64A ... rear end, 65 ... exhaust port , 66 ... Mounting part, 71 ... 1st guide plate, 72 ... 2nd guide plate, 74 ... Upper partition plate, 91 ... Lower partition plate, 95 ... Under panel, 96B ... Back panel, 96S ... Side panel, 99 ... Running Surface, 101 ... Rubber mat, 101B ... Lower end, 101T ... Upper end, 102 ... Resin mat, 102B ... Lower end, 102T ... Upper end, 103 ... Guard mounting part, 104 ... Bracket, 105 ... Fixed plate part, 106 ... Oblique Angle setting plate, 107 ... Support plate, 108 ... Insertion hole, 109 ... Fastening member, 110 ... Hose holder, 111 ... Running wind, 112 ... Arrow.

Claims (5)

A gas-liquid separation unit that separates the water vapor from the off-gas by liquefying the water vapor contained in the off-gas from the fuel cell.
An elastic drain hose, the drain hose attached to the gas-liquid separation unit and having a drain port for discharging the liquefied generated water at a tip extending downward of the vehicle.
An elastic guard member including the guard member that hangs behind the drainage port and covers the space below the drainage port from the rear.
The drain hose
A fuel cell vehicle discharge device in which a rear end portion, which is a rear end portion of the vehicle at the opening end portion forming the drainage port, is in contact with the guard member in a state of being compressed and deformed in a stopped state of the vehicle. The fuel cell vehicle according to claim 1, wherein the drain port extends in a plane direction orthogonal to the vertical direction of the vehicle or in a plane direction inclined diagonally downward on the rear side of the vehicle with respect to the plane direction. Discharge device. The fuel cell vehicle discharge device is
The gas-liquid separation unit is provided with a guard mounting portion for mounting the guard member.
The guard mounting portion is
A bracket connected to the gas-liquid separation unit, the bracket having an oblique angle setting plate extending diagonally downward on the front side of the vehicle, and the bracket.
It has a support plate that supports the upper end portion of the guard member by sandwiching it with the bevel angle setting plate.
The guard member
The claim that the vehicle is in an elastically deformed state in which the lower end portion is displaced toward the rear side of the vehicle with respect to the extending direction of the bevel angle setting plate due to contact with the rear end portion of the drain hose in the stopped state of the vehicle. The fuel cell vehicle discharge device according to 1 or 2. The guard mounting portion is
The fuel cell vehicle discharge device according to claim 3, further comprising a hose holder that is connected to the support plate and presses the tip of the drain hose from the front side of the vehicle. The guard member
It is composed of a rubber mat and a resin mat that overlaps the rear surface of the rubber mat and has higher elasticity than the rubber mat.
The fuel cell vehicle discharge device according to any one of claims 1 to 4, wherein the lower end portion of the rubber mat is located below the lower end portion of the resin mat.

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