Fuel cell system and condensate water storage device

1 . A condensate water storage device comprising:

a storage container having an inlet port through which treatment target gas is introduced, and an outlet port through which the treatment target gas is discharged, the storage container being configured to store condensate water contained in the treatment target gas; and

a discharge member comprising a first end immersed in the condensate water in the storage container and a second end exposed outside of the storage container, the discharge member being configured to selectively discharge the condensate water to the outside of the storage container based on a supply pressure of the treatment target gas introduced into the storage container,

wherein the storage container comprises:

a container main body defining a storage space configured to store the condensate water; and

a container cover disposed at an upper side of the container main body and configured to cover the storage space,

wherein the discharge member is disposed in the container cover,

wherein when the supply pressure of the treatment target gas is higher than a reference pressure, the condensate water is discharged to the outside through the discharge member,

wherein the first end of the discharge member has a first cross-sectional area, and the second end of the discharge member has a second cross-sectional area smaller than the first cross-sectional area,

wherein a cross-sectional area of the discharge member gradually decreases from the first end to the second end of the discharge member,

an opening/closing member configured to selectively open and close the outlet port,

wherein when the supply pressure of the treatment target gas is higher than a reference pressure, the opening/closing member closes the outlet port, and the condensate water is discharged to the outside through the discharge member, and

wherein the opening/closing member comprises:

a valve seat configured to be movable in a direction toward and away from the outlet port; and

a support part configured to elastically support a movement of the valve seat relative to the storage container, and

the support part elastically connects the outlet port and the valve seat, and the support part may selectively define a gap between the outlet port and the valve seat.

2 . The condensate water storage device of claim 1 , comprising:

a sealing member disposed between the container main body and the container cover.

3 . The condensate water storage device of claim 1 , comprising:

a fixing member configured to fix the discharge member to the container cover.

4 . The condensate water storage device of claim 3 , comprising:

a sealing member disposed between the fixing member and the discharge member.

5 . A fuel cell system comprising:

a fuel cell stack;

a storage container having an inlet port through which exhaust gas discharged from the fuel cell stack is introduced, and an outlet port through which the exhaust gas is discharged, the storage container being configured to store condensate water contained in the exhaust gas; and

a discharge member comprising a first end immersed in the condensate water in the storage container and a second end exposed to the outside of the storage container, the discharge member being configured to selectively discharge the condensate water to the outside of the storage container based on a supply pressure of the exhaust gas introduced into the storage container,

wherein the storage container comprises:

a container main body defining a storage space configured to store the condensate water; and

a container cover disposed at an upper side of the container main body and configured to cover the storage space,

wherein the discharge member is disposed in the container cover,

wherein when the supply pressure of the treatment target gas is higher than a reference pressure, the condensate water is discharged to the outside through the discharge member,

wherein the first end of the discharge member has a first cross-sectional area, and the second end of the discharge member has a second cross-sectional area smaller than the first cross-sectional area,

wherein a cross-sectional area of the discharge member gradually decreases from the first end to the second end of the discharge member,

an opening/closing member configured to selectively open and close the outlet port,

wherein when the supply pressure of the exhaust gas is higher than a reference pressure, the opening/closing member closes the outlet port, and the condensate water is discharged to the outside through the discharge member,

wherein the opening/closing member comprises:

a valve seat configured to be movable in a direction toward and away from the outlet port; and

a support part configured to elastically support a movement of the valve seat relative to the storage container, and

the support part elastically connects the outlet port and the valve seat, and the support part may selectively define a gap between the outlet port and the valve seat.

6 . The fuel cell system of claim 5 , comprising:

a compressor configured to compress inflow gas to be supplied to the fuel cell stack,

wherein the supply pressure of the exhaust gas is adjusted by a pressure of the inflow gas by the compressor.

7 . The fuel cell system of claim 6 , comprising:

a humidifier disposed between the compressor and the fuel cell stack and configured to humidify the inflow gas using the exhaust gas; and

an air control valve disposed between the humidifier and the fuel cell stack and comprising a bypass flow path configured to selectively allow the inflow gas, which is to be introduced into the fuel cell stack, to flow to the humidifier.

8 . The fuel cell system of claim 5 , comprising:

a sealing member disposed between the container main body and the container cover.

9 . The fuel cell system of claim 5 , comprising:

a fixing member configured to fix the discharge member to the container cover.

10 . The fuel cell system of claim 9 , comprising:

a sealing member disposed between the fixing member and the discharge member.