| 摘要 |
<p>An air conditioner has a body casing for receiving a fan and a fan motor, heat exchanger, drain pump, switch box, etc. and has a top plate placed at a top surface of the body casing and hanging the fan and fan motor, heat exchanger, drain pump, switch box, etc. The top plate is thinned to a thickness not more than a predetermined value. Reinforcement ribs are formed to radially extend from the central portion of the top plate, which supports the fan and motor, to an outer peripheral portion, which supports the heat exchanger. A section between each reinforcement rib is formed flat. The number, cross-sectional shape (shape of drawing), depth, width, etc. of the reinforcement ribs are optimally adjusted. As a result, the construction eliminates the need of forming a large number of auxiliary reinforcement ribs etc. conventionally used. In addition, the rigidity, strength, deflection characteristics, vibration characteristics, etc. of the top plate can be improved to a required level.</p> |
