To impart the sealing part of a pipe joint for refrigerating machine with two properties of gas barrier and blister resistance by paying attention to the fact that a blister phenomenon is principally caused by abrupt pressure variation of environment where a rubber gasket is disposed.
A first rubber gasket 4 having high gas barrier properties and low blister resistant properties is disposed on the atmospheric side at the sealing part of a pipe joint for refrigerating machine for coupling the refrigerant piping on the cabin side of the refrigeration cycle of a refrigerating machine with the refrigerant piping 22, 23 on the engine room side. A second rubber gasket 5 having low gas barrier properties and high blister resistant properties is disposed on the refrigerant side at the sealing part of the pipe joint for refrigerating machine. According to the arrangement, refrigerant gas being used in the refrigeration cycle of a refrigerating machine can be prevented from leaking to the atmosphere and blister phenomenon can also be prevented.
WAKABAYASHI HIROYUKI
HARADA HIDEO
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