| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve blast performance and to reduce the generation of noise by providing an air guide part having an air flow straightening surface extending in the direction of an air outlet grill in a state to be continued from the rear end of a bell mouth. SOLUTION: An air outlet grill 17 of an outdoor machine unit is protruded frontward by a width W of a mounting edge part 17a from a front part 12a of a cassette casing 12, in which an air supply port 18 is formed, through the mounting edge 17a to a cassette casing front part 12a having width W. A plate- form wind direction regulation guide 21 to arbitrarily regulate a wind direction is inclinably arranged at an opening part for air supply on the front part side. Further, an air guide 22 for turbulence prevention having rounding surfaces for straightening of an air flow, having a curvature gradually increasing radially externally continuously from the rear end of a bell mouth 19, at four corners in the directions of diagonal lines in a space formed according to a frontward protrusion size W inside the air outlet grill 17 is disposed in a state to extend approximately to the vicinity of an air direction regulation guide 21 of the air outlet grill 17.</p> |
