Fuel cell humidifier with bypass tube

A fuel cell humidifier for humidifying air supplied from outside with moisture in an off-gas discharged from a fuel cell stack and supplying the humidified air to the fuel cell stack, the fuel cell humidifier comprising:

• a humidification module comprising a housing and a plurality of hollow fiber membranes arranged in the housing;
• a first cap having an air discharge port for supplying the humidified air to the fuel cell stack and coupled to a first termination end of the humidification module, the air discharge port being spaced apart from the humidification module;
• and
• a bypass tube for transferring the condensate water generated from the humidified air to an interior space of the housing through which the off-gas flows,
• wherein a first end of the bypass tube is positioned in the air discharge port,
• wherein the bypass tube is in fluid communication with the interior space of the housing through a second end of the bypass tube,
• wherein a screw thread for providing a spiral path to the condensate water is formed on the inner surface of the air discharge port, and the air discharge port is inclined so that the humidified air flows upwards,
• wherein the first end of the bypass tube is positioned adjacent to the termination portion of the screw thread, to transfer the condensate water, which flows into the air discharge port to reach the termination portion of the screw thread through the spiral path, to the interior space of the housing.