Seal joint structure for refrigerant pipe coupling, uses O-rings made of blister-proof material and material easy to undergo plastic deformation with refrigerant pressure for refrigerant and atmosphere sides

摘要

The O-rings (11,12) are respectively arranged on the refrigerant and atmosphere sides of a junction between two pipes (2,3) to prevent the refrigerant leakage. The O-ring (11) is made from a material which is excellent in blister-proof property. The O-ring (12) is made from a material which is easy to undergo plastic deformation with the pressure of the refrigerant.