Patent ID: 8900762

Claim:
A fuel cell, comprising: an electricity generator configured to generate electricity based on an electrochemical reaction; a fuel container configured to store a raw fuel; a recovering unit configured to mix i) the raw fuel, ii) an unreacted fuel which has not participated in the electrochemical reaction, and iii) water produced from the electrochemical reaction so as to produce mixed fuel, and supply the mixed fuel to the electricity generator; and an oxygen provider configured to supply oxygen to the electricity generator, wherein the recovering unit comprises: a housing connected to and communicating fluid with the electricity generator and the fuel container; a discharging pipe located inside the housing configured to discharge gas recovered from the electricity generator, and having a first end extending to the outside of the housing and a second end extending to the inside of the housing; a first valve located in the discharging pipe and configured to be opened while the fuel cell is operating such that gas inside the housing is evaporated via the discharging pipe during the operation; a second valve located in an anode recovering pipe which connects the housing with an outlet of an anode electrode of the electricity generator so as to communicate fluid with each other; and a third valve located in a cathode recovering pipe which connects the housing with an outlet of a cathode electrode of the electricity generator so as to communicate fluid with each other, wherein the cathode recovering pipe is configured to directly communicate the fluid between the cathode electrode outlet and the third valve and between the third valve and the housing, wherein the second and third valves are open while the fuel cell is operating, and wherein a porous material is formed on an inner surface of the housing and covers an inlet of the anode recovering pipe such that the inlet of the anode recovering pipe does not penetrate the porous material.