Heat exchanger

A heat exchanger, comprising:

• a first pipe and a second pipe, wherein the first pipe comprises a circumferential wall and a main channel surrounded by the circumferential wall, an end in a length direction of the first pipe is a first end, the first end of the first pipe comprises a first end surface;
• an inlet/outlet pipe connected to the first pipe;
• a plurality of heat exchange tubes, wherein each of the plurality of heat exchange tubes is connected to the first pipe and the second pipe, each of the plurality of heat exchange tubes comprises a plurality of channels arranged to be spaced apart, each of the plurality of channels is connected to the first pipe and the second pipe, the plurality of channels comprise a first channel and a second channel, wherein, on a cross section of the plurality of heat exchange tubes taken along a left-right direction, a flow cross-sectional area of the first channel is greater than a flow cross-sectional area of another channel different from the first channel in the plurality of channels, and a flow cross-sectional area of the second channel is less than a flow cross-sectional area of another channel different from the second channel in the plurality of channels;
• and
• a first member, wherein the first member is disposed in the main channel of the first pipe, the first member extends by a predetermined distance along the length direction of the first pipe, the main channel comprises a first flow channel and a second flow channel, the first member is disposed between the first flow channel and the second flow channel, the first flow channel is connected to the inlet/outlet pipe, the second flow channel is connected to each of the plurality of heat exchange tubes, the first member comprises a plurality of through-holes, and each of the plurality of through-holes connects the first flow channel and the second flow channel,
• wherein a through-hole of the plurality of through-holes that has a smallest distance to the first end surface of the first pipe in the length direction of the first pipe is a first through-hole, d3 denotes the smallest distance between the first through-hole and the first end surface in the length direction of the first pipe, and d3< (10d1+9d2)*A1/A2, wherein d1 denotes an overall tube thickness of each of the plurality of heat exchange tubes, d2 denotes a smallest distance between adjacent heat exchange tubes of the plurality of heat exchange tubes in the length direction of the first pipe, A1 denotes a flow cross-sectional area of the first channel on the cross section of each of the plurality of heat exchange tubes taken along the left-right direction, and A2 denotes a flow cross-sectional area of the second channel on the cross section of each of the plurality of heat exchange tubes taken along the left-right direction.