HEAT EXCHANGER AND AIR CONDITIONING SYSTEM HAVING SAME

A heat exchanger and an air conditioning system are provided. The heat exchanger includes a first fin and a plurality of flat pipes parallel to each other and arranged at interval, wherein each of the plurality of flat pipes includes a reserved pipe section, each of the plurality of flat pipes is bent at the reserved pipe section, the first fin is connected to the reserved pipe section and is capable of covering gaps between a plurality of reserved pipe sections; and wherein along an extending direction of the reserved pipe section, a width of the first fin is defined as W1, the number of the first fin is n, a length of the reserved pipe section is defined as L, and the width W1 of the first fin, the number n of the first fin, the length L of the reserved pipe section satisfy following relationship:W1≤L/n.