Patent ID: 8869790

Claim:
A flat hollow tube solar collector, comprising: two collecting tubes, installed parallel to each other, and each of the collecting tubes having a plurality of connecting portions; a plurality of flat hollow tubes, arranged parallel to one another and installed between two collecting tubes, and each of the hollow tubes having two distal tube sections and a middle section situated between the two distal tube sections, and the middle section having a cross-section greater than the cross-section of the two distal tube sections, and the two distal tube sections of each the hollow tube being interconnected with one of the connecting portions of each collecting tube; and a seal structure installed between the connecting portion and the distal tube section interconnected to the connecting portion, wherein the seal structure includes a locking device and a baffle plate disposed at the distal tube section, and the locking device is movably sheathed on the distal tube section, and the baffle plate is disposed between the locking device and the connecting portion and abutted against the locking device, and the connecting portion includes a screw thread formed on an inner side of the connecting portion, and the locking device is secured to the screw thread to compress the baffle plate to forcibly seal the distal tube section and the connecting portion.