Outdoor unit and air conditioner

The outdoor unit comprises a shell, an outdoor heat exchanger and a water distribution device, the shell is provided with an inner cavity, a base plate is arranged at the lower end of the shell, the base plate is provided with a water collection tank, the outdoor heat exchanger is connected to the shell and located in the inner cavity, and the water distribution device is arranged in the outer cavity. The water distribution device is connected to the shell and comprises a water pump and a water spraying pipe, the input end of the water pump is communicated with the water collecting tank, the output end of the water pump is communicated with the water spraying pipe, and a water outlet of the water spraying pipe faces the outdoor heat exchanger. Accumulated water collected on the base plate is pumped away through the water pump of the water distribution device, then the accumulated water is sprayed to the outdoor heat exchanger through the water spraying pipe, heat dissipation of the outdoor heat exchanger is f