Liquid separation device and heat exchanger

The utility model provides a liquid separation device and a heat exchanger. The liquid separation device comprises a liquid separation head, an expansion valve and an inlet. The liquid separation head comprises a first shell and a second shell, the first shell and the second shell are fixedly connected and jointly form a main channel and a plurality of liquid separation channels, one end of each liquid separation channel is communicated with the bottom of the main channel, and the other end of each liquid separation channel is opened in the periphery of the liquid separation head to form a liquid separation outlet; the expansion valve is arranged at the top of the main channel. The inlet communicates with the main channel. By means of the structural design, the liquid separation device is high in production efficiency, good in machining consistency and capable of being specially designed according to gas-liquid separation of two-phase refrigerants, and therefore the good liquid separation effect is achieved.