本发明涉及（1）由以下组成的多个管（2）和横向于布置散热片（3）包括热交换块（4）和至少一个由塑料管板（5）UNE水箱的热交换器（6）的 那里。 在管板（5）具有用于接收所述端部（8）的管（2）中，并且水盒（6）被固定到管板的开口（7）（5）不透液体的。 为了实现热交换管（2）的在管板（5）和所述水箱的简单且可靠的连接（6）到管板（5）中，提出的是，塑料管板（5）上的一个侧立面图（9）， 在其中的开口（7）的位置，并且端部（8）的管（2）通过在径向方向上膨胀或按压在上管板（5）的轴向方向上的附接。 在每种情况下在边缘处或管的底部（5）和所述水箱（6）上设置有位于上彼此和所述管板（5）是通过振动焊接到这些平的表面的装置连接到所述水箱（6）的平坦面。

U7 The invention relates to a heat exchanger (1) consisting of a a plurality of tubes (2) and transversely thereto arranged fins (3) comprising heat exchanger block (4) and at least one made from plastic tube bottom (5) une water box (6 ) consists. The tube plate (5) has openings (7) for receiving the ends (8) of the tubes (2) and the water box (6) is mounted liquid-tightly on the tube plate (5). A simple and reliable connection of the heat exchanger tubes (2) to the tube plate (5) and the water box (6) to the tube plate (5) to achieve, it is proposed that the plastic tube plate (5) on one side elevations (9), in which the openings (7) are located, and the ends (8) of the tubes (2) by expanding in a radial direction or press-fitting in the axial direction on the tube bottom (5) are attached. Each at the edges or tube sheet (5) and the water tank (6) is provided with flat surfaces which lie on one another and the tube plate (5) is connected to the water tank (6) by means of vibration welding to these flat surfaces.