Air conditioner outdoor unit

The utility model discloses an air conditioner outdoor unit which comprises a heat exchanger and a plurality of flow dividing assemblies, the heat exchanger is arranged in an internal installation space of the outdoor unit, the heat exchanger is provided with a plurality of heat exchange flat pipe sets which are arranged up and down, and each heat exchange flat pipe set comprises a plurality of heat exchange flat pipes which are arranged up and down at intervals; the multiple flow dividing assemblies are connected with the multiple heat exchange flat pipe sets in a one-to-one correspondence mode. Each flow dividing assembly comprises a flow dividing head and a plurality of flow dividing branch pipes, the flow dividing branch pipes at least comprise capillary pipes, the flow dividing branch pipes are arranged in the circumferential direction of the flow dividing head at intervals, the flow dividing branch pipes are connected with the heat exchange flat pipes, and each flow dividing branch pipe is provided with