| 摘要 |
PROBLEM TO BE SOLVED: To enhance a heating efficiency while preventing a short-circuit by expanding a side wall of a case body in a downwardly slanted manner thus forming a downwardly slanted blow-off opening on its extension and providing a suction propeller fan at an inlet side of a suction opening of the case body. SOLUTION: A side wall 2a of a case body 2 is expanded in a downwardly slanted manner so as to form a downwardly slanted blow-off opening 4 on its extension. A suction propeller fan 20 is disposed at an inlet side of a suction opening 3 of the case body 2. A centrifugal fan 6 has a drive shaft 21 thereof extended downwardly and the suction propeller fan 20 is fixedly mounted on the lower end of the drive shaft 21. Due to such a construction, during a heating operation, upon controlling of a number of revolution of the centrifugal fan 6 and the suction propeller fan 20, hot air blown off from the blow-off opening 4 reaches a floor surface of a room 9. Furthermore, with this air flow, an optimum air conditioning zone can be formed in the room 9 and a short-circuit which leads the hot air blown off from the blow-off opening to the suction opening can be prevented. |
