| 摘要 |
An outdoor unit of air conditioner for efficiently cooling a board having a heater element and a heat generating component in an electrical component box, thereby enhansing heat release efficiency. Air flowing from a machinery chamber 11 into an electrical component box 60 is divided into: a flow Fa flowing from open space defined by an arm 64 and a support post 65 through a periphery of a box base plate 62; a flow Fb flowing through a first ventilation hole 62b; a flow Fc flowing through a second ventilation hole 62c; and a flow Fd flowing through a third ventilation hole 62d. The board and the heat generating component can be effectively cooled by the flows Fb, Fc, and Fd directly touching the board and the heat generating component, and by the flow Fa cooling overall the inside of the electrical component box 60.
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