| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner of high energy efficiency by improving heat transfer performance of a heat exchanger. SOLUTION: The heat exchanger 15 has a plurality of fins 1 juxtaposed at predetermined spaces in the rotation axis direction of a blower 5; heat exchanger tubes 2 inserted almost at a right angle to the fins 1 to form rows in the longitudinal direction of the fins 1 and connected in a plurality of rows in an air current direction to form refrigerant passages; and branch parts provided at the connection parts of the heat exchanger tubes 2 to partially increase or decrease the path number of the refrigerant passages. The heat exchanger is constituted such that the refrigerant flowing through each of a plurality of refrigerant passages which pass different paths at least partially between a refrigerant inlet and a refrigerant outlet flows in one direction sequentially between the rows from the windward row to the leeward row in the air current direction or from the leeward row to the windward row. One path part is provided at the most windward row heat exchanger tube. The fins 1 brought into close contact with the refrigerant outlet 18 and connection piping 16c in the case of operating the heat exchanger 15 as a condenser, are thermally separated by a separating means 21. COPYRIGHT: (C)2007,JPO&INPIT |
