Electric control component and air conditioner

The utility model discloses an electric control part and an air conditioner, the electric control part comprises a circuit assembly, a radiator and a box body assembly, the circuit assembly comprises a circuit board and a first device group arranged on the circuit board, the first device group comprises a plurality of inverter modules, semiconductor power devices in a PFC (Power Factor Correction) circuit and bridge rectifiers, at least two devices in the first device group are arranged in a staggered manner in a first direction parallel to the circuit board, and the radiator covers the first device group; the box body assembly is internally provided with an installation cavity and an air channel cavity which are arranged in an isolated mode, the circuit assembly is installed in the installation cavity, the radiator is exposed in the air channel cavity, and the two sides of the box body assembly in the second direction are each provided with a ventilation opening communicated with the air channel cavity. The second direction is parallel to the circuit board and is orthogonal to the first direction. Therefore, the heat dissipation efficiency and the heat dissipation effect can be improved, and the working stability is improved.