Heat exchange device and air conditioner

The heat exchange device comprises a water tank and a refrigerant pipe, the water tank comprises an outer shell and an inner container, the outer shell is arranged on the periphery of the inner container in a sleeved mode, the inner container is provided with a water inlet and a water outlet, and the water inlet and the water outlet respectively penetrate through the outer shell to be exposed and extend. The refrigerant pipe is wound on the outer peripheral wall of the inner container, a winding section is formed on the outer peripheral wall of the inner container, a refrigerant inlet and a refrigerant outlet are formed in the two ends of the refrigerant pipe respectively, the refrigerant inlet and the refrigerant outlet penetrate through the shell to be exposed and extend, a first gap is formed between the outer peripheral wall of the winding section and the inner peripheral wall of the shell, and the first gap is a vacuum gap; the heat in the refrigerant pipe is prevented from being transferred to the shell