Patent ID: 8112901

Claim:
A gas dryer, comprising: a chamber and a seal unit being assembled on a rear wall of the chamber, with an end of a heating disk compressing said seal unit, wherein said seal unit comprises a seal loop shaped as a ring, said seal loop comprising an inner fixed part with a shape of a flat-sheet ring which is fixed on the chamber rear wall, and an outer seal part for sealing the chamber rear wall with the heating disk, said outer seal part being joined with one end of the flat-sheet ring of the inner fixed part, and the heating disk compressing on the outer seal part which has a ring section, wherein the seal unit further comprises a fixed loop assembled between the chamber rear wall and the heating disk, said fixed loop comprising fastening teeth for fixing the seal loop and fixed structure for assembling the fixed loop on the chamber rear wall, and wherein the fastening teeth are set on an outer end of a circumference of the fixed loop and said fixed structure is formed by fixed holes set on the fixed loop, and corresponding fixed blocks with at least one threaded hole are respectively set on the chamber rear wall, and the inner fixed part is fixed on the chamber rear wall by the fastening teeth.