Heat exchanger and air conditioning system

An air conditioning system, comprising:

• a heat exchanger, comprising:
• a first assembly comprising a first tube and a second tube;
• a second assembly comprising a third tube and a fourth tube;
• fins comprising a plurality of first fins;
• a first circuit comprising a first compressor and a first throttling device;
• a second circuit comprising a second compressor and a second throttling device;
• and
• a plurality of heat exchange tubes,
• wherein each heat exchange tube is a flat tube and comprises a plurality of channels extending along a length direction of each heat exchange tube, the plurality of channels being arranged at intervals in a width direction of each heat exchange tube,
• wherein the plurality of heat exchange tubes comprise a first heat exchange tube and a second heat exchange tube, one end of the first heat exchange tube is directly or indirectly connected with the first tube, another end of the first heat exchange tube is directly or indirectly connected with the third tube, the first heat exchange tube communicates the first tube with the third tube, one end of the second heat exchange tube is directly or indirectly connected with the second tube, another end of the second heat exchange tube is directly or indirectly connected with the fourth tube, the second heat exchange tube communicates the second tube with the fourth tube, the first heat exchange tube and the second heat exchange tube are arranged at an interval in a length direction of the first tube, the first tube is not communicating with the second tube, the third tube is not communicating with the fourth tube,
• wherein a first fin of the plurality of first fins is connected with the first heat exchange tube and connected with the second heat exchange tube in the length direction of the first tube, and the first heat exchange tube, part of the first fin and the second heat exchange tube are arranged along the length direction of the first tube,
• wherein a width of the first heat exchange tube is smaller than a width of the first fin, a width of the second heat exchange tube is smaller than the width of the first fin, and the width of the first fin is smaller than a sum of the width of the first heat exchange tube and the width of the second heat exchange tube,
• wherein a plane perpendicular to the length direction of the first tube is defined as a first plane, and a projection of the first heat exchange tube on the first plane and a projection of the second heat exchange tube on the first plane are at least partially non-coincident,
• wherein a first minimum distance between a projection of an end of the width of the first heat exchange tube on the first plane and a projection of an end of a width the first fin on the first plane is smaller than the width of the second heat exchange tube, the end of the width of the first heat exchange tube and the end of the width of the first fin being on a same side, and adjacent first fins connected to the first heat exchange tube are spaced apart from each other in a thickness direction of the first heat exchange tube by a gap defined by the first minimum distance,
• wherein a second minimum distance between a projection of an end of the width of the second heat exchange tube on the first plane and a projection of another end of the width of the first fin on the first plane is smaller than the width of the first heat exchange tube, the end of the width of the second heat exchange tube and the another end of the width of the first fin being on another same side, and adjacent first fins connected to the second heat exchange tube are spaced apart from each other in a thickness direction of the second heat exchange tube by a gap defined by the second minimum distance, and the width of the first heat exchange tube is greater than or equal to the width of the second heat exchange tube, and
• wherein the first circuit communicates with the first tube and the third tube of the heat exchanger, and the second circuit communicates with the second tube and the fourth tube of the heat exchanger.