Collector assembly and heat exchanger with simplified structure

A heat exchanger, comprising:

• a first collector defining a first chamber and a second chamber;
• wherein the first collector comprises a first piece, a second piece and a first sealing member;
• the first piece is fixed to the second piece;
• the first piece comprises a spacer portion between the first chamber and the second chamber;
• the first sealing member comprises a first segment which is located between the spacer portion and the second piece;
• both the spacer portion and the second piece abut against the first segment;
• wherein the first segment comprises a main body portion, a concave portion and at least two convex ribs;
• the convex ribs protrude from the main body portion in a direction away from the main body portion;
• an inner chamber of the concave portion is located between two adjacent convex ribs;
• and the spacer portion or the second piece abuts against the convex ribs;
• wherein the spacer portion abuts against two convex ribs of the plurality of convex ribs;
• when the first segment is in a free state, the concave portion comprises a first concave portion, the first concave portion is located between the two convex ribs which abut against the spacer portion;
• when the first segment is in a compressed state, a bottom wall of the first concave portion contacts, presses against, or has a gap with the spacer portion;
• wherein the first sealing member comprises a second segment, a third segment, a fourth segment and a fifth segment;
• the third segment connects one end of the second segment and one end of the fourth segment;
• the fifth segment connects another end of the second segment and another end of the fourth segment;
• the first segment connects the third segment and the fifth segment;
• the first segment is located between the second segment and the fourth segment;
• the first segment is spaced apart from the second segment and the fourth segment respectively by a certain distance;
• and
• the second segment, the third segment, the fourth segment and the fifth segment are located between the first piece and the second piece;
• the first piece and the second piece abut against the second segment, respectively;
• the first piece and the second piece abut against the third segment, respectively;
• the first piece and the second piece abut against the fourth segment, respectively;
• and the first piece and the second piece abut against the fifth segment, respectively;
• wherein the first piece comprises a first groove portion and a second groove portion;
• the first chamber is located between the first groove portion and the second piece;
• and the second chamber is located between the second groove portion and the second piece;
• wherein the first piece comprises an annular protrusion, and the heat exchanger comprises a heat exchange tube;
• and
• wherein the annular protrusion is arranged around the notch of the first groove portion, and a tube chamber of the heat exchange tube communicates with the first chamber;
• wherein the annular protrusion comprises a plurality of notch portions and an extension portion located between two adjacent notch portions;
• an end surface of the notch portion facing a side of the second piece is closer to the second piece than an end surface of the extension portion facing a side of the second piece;
• the end surface of the notch portion facing the side of the second piece and the end surface of the extension portion facing the side of the second piece are both are separated from the second piece by a certain distance;
• and
• the notch portion comprises a groove recessed in a direction away from the heat exchange tube.