Heat exchange assembly, air conditioner outdoor unit and air conditioner

The utility model discloses a heat exchange assembly, an air conditioner outdoor unit and an air conditioner. The heat exchange assembly comprises a first shell and a second shell, wherein the first shell is provided with a first port and a second port; the gas-liquid separator is arranged at the second port of the first shell; and the internal heat exchanger is arranged in the first shell. High-temperature and high-pressure water vapor sent out by the water vapor compressor enters the heat exchanger assembly, medium-temperature and high-pressure condensate water is formed after heat exchange of the heat exchanger assembly, the medium-temperature and high-pressure condensate water enters the first shell through the throttling component, and low-temperature and low-pressure condensate water is formed in the first shell. The low-temperature and low-pressure condensed water absorbs heat and is evaporated to form low-temperature and low-pressure steam, and the low-temperature and low-pressure steam passes through a gas-liquid separator and then enters a steam compressor to be compressed; the internal heat exchanger communicates with an indoor heat exchanger of the air conditioner indoor unit to form a circulating flow path, circulating liquid contained in the circulating flow path circularly flows along the circulating flow path, indoor heat is absorbed and transmitted to the low-temperature and low-pressure condensate water in the first shell, and indoor air is cooled.