Air conditioning system

An air conditioning system, comprising:

• an indoor heat exchanger;
• an outdoor heat exchanger;
• an economizer;
• and
• an electric control box, wherein the economizer is disposed between the indoor heat exchanger and the outdoor heat exchanger, the economizer comprises a heat exchange body provided with a plurality of first micro-channels for a first refrigerant flow and a plurality of second micro-channels for a second refrigerant flow;
• the second refrigerant flow absorbs heat from the first refrigerant flow, so as to subcool the first refrigerant flow;
• or
• the first refrigerant flow absorbs heat from the second refrigerant flow, so as to subcool the second refrigerant flow;
• and
• the economizer is configured to dissipate heat of an electronic component in the electric control box, wherein the electric control box comprises a box body, the box body is provided with a mounting cavity, the electronic component is disposed in the mounting cavity, and the economizer is disposed in the mounting cavity or at least one portion of the economizer is disposed in the mounting cavity.