Patent ID: 7322401

Claim:
A ventilator comprising: a case having a first flow passage and a second flow passage therein; a first fan in the case for drawing room air in a room to outside of the room through the first flow passage; a second fan in the case for guiding outdoor air outside of the room to the room through the second flow passage; a heat exchanger in the case, the heat exchanger having a working fluid therein for repeating evaporation (heat absorption) and condensing (heat dissipation) by a temperature difference of the room air flowing through the first flow passage and the outdoor air flowing through the second flow passage to exchange heat between the room air flowing through the first flow passage and the outdoor air flowing through the second flow passage, the heat exchanger being located between an inlet of the first flow passage and the first fan and between an inlet of the second flow passage and the second fan, the inlet of the first flow passage being substantially perpendicular to an outlet of the second flow passage, the heat exchanger including at least one heat pipe; and a panel for isolating the first flow passage from the second flow passage, the at least one heat pipe passing through the panel, wherein the first and second fans draw air in an axial direction and discharge the air in a radial direction.