| 摘要 |
<p>The present invention provides a pipe connecting structure including a male flange block (24) combined with a first pipe (22) and a female flange block (28) combined with a second pipe (26), which is fastened to the male flange block (24) by fastening means (30,32), where a protrusion (24a) having a hole (H1) that communicates with the first pipe (22) is formed through the male flange block (24), and an insert portion (28a) into which the protrusion (24a) is inserted is formed through the female flange block (28), and a sealing member (34) to closely contact with the end face (24b) of the protrusion (24a) is seated on the bottom (28b) inside the insert portion (28a), and the sealing member (34) includes an inner sealing part (34a) of soft metal and an outer sealing part (34b) of rubber tightly fitted around the outer circumference of the inner sealing part (34a). Therefore joints between pipes, a heat exchanger and a pipe, or two components can bear high pressures in a refrigerating cycle system using a CO 2 refrigerant, air tightness can be maintained under low and high temperatures without changes in quality and shape of a sealing members, and it is possible to prevent and minimize leakage of the refrigerant by preventing permeation of CO 2 .</p> |
