Heat exchanger

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;
• a plurality of heat exchange tubes, a peripheral contour of a cross section of the heat exchange tube being generally flat, the heat exchange tube comprising a plurality of channels extending along a length direction of the heat exchange tube, the plurality of channels being arranged at intervals in a width direction of the heat exchange tube, the plurality of channels comprising a first channel and a second channel, a flow sectional area of the first channel on the cross section of the heat exchange tube being larger than flow sectional areas of other channels on the cross section of the heat exchange tube, and a flow sectional area of the second channel on the cross section of the heat exchange tube being smaller than flow sectional areas of other channels on the cross section of the heat exchange tube;
• the plurality of heat exchange tubes comprising a first heat exchange tube and a second heat exchange tube, a first end of the first heat exchange tube in the length direction being communicated with the first tube, and a second end of the first heat exchange tube in the length direction being communicated with the third tube, to communicate the first tube and the third tube;
• the second heat exchange tube being communicated with the second tube and the fourth tube, the second heat exchange tube comprising a first bent section and a first straight section, a first end of the first bent section being communicated with the second tube, and a second end of the first bent section being communicated with a first end of the first straight section, and the first heat exchange tube and the second heat exchange tube are arranged at intervals in a length direction of the first tube;
• and
• a fin comprising a first fin, at least part of the first fin being connected with the first heat exchange tube and at least part of the first fin being connected with the second heat exchange tube in the length direction of the first tube, and the first heat exchange tube, the first fin and the second heat exchange tube being sequentially arranged in the length direction of the first tube, and two or more first fins are provided;
• wherein a plane perpendicular to the length direction of the first tube and parallel to the width direction and the length direction of the first heat exchange tube is defined as a first plane, in the first plane, a length direction of a projection of a partial tube section of the first bent section of the second heat exchange tube is at an angle with a length direction of a projection of the first straight section of the second heat exchange tube, and in the width direction of the first heat exchange tube, a projection of the second channel of the first heat exchange tube is located between a projection of the first channel of the first heat exchange tube and a projection of the first channel of a part of the first bent section, and a projection of the first channel of the first bent section is located between the projection of the second channel of the first heat exchange tube and a projection of the second channel of the part of the first bent section,
• wherein the second tube is internally provided with a first plate, the first plate divides a flow channel of the second tube into a first flow channel and a second flow channel, the partial tube section of the first bent section is located in the first flow channel and communicated with the first flow channel, and the first plate comprises a partial inclined face, and the inclined face guides more refrigerant to flow to the first channel of the first bent section when the heat exchanger is in operation.