Patent ID: 8243447

Claim:
A power conversion apparatus comprising: an outer casing; and an inverter unit housed in the outer casing, the inverter unit includes: a unit case, the unit case includes a circuit-side case and a wind-tunnel-side case, the wind-tunnel-side case attached to the circuit-side case, the circuit-side case including a detachable side plate; a capacitor block removably provided inside of the circuit-side case, the capacitor block positioned on an inner side of the detachable side plate, the capacitor block includes: a capacitor case having a plurality of capacitor insertion holes; a plurality of electrolytic capacitors, each of the plurality of electrolytic capacitors placed in a respective one of the plurality of capacitor insertion holes; and a laminated bus bar connected to the electrolytic capacitors; and a fan block placed in the unit case in such a manner as to be removable from a front side of the unit case, the fan block includes: a fan case; and a circuit-side cooling fan and a wind-tunnel-side cooling fan provided in the fan case, wherein the circuit-side cooling fan positioned in the circuit-side case, and wind-tunnel-side cooling fan positioned in the wind-tunnel-side case.