| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe joint device for preventing the occurrence of refrigerant passing sounds. SOLUTION: The pipe joint device comprises: pipes 14, 15 having insertion cylinder portions 22, 23 and bulged portions 18, 19, respectively; O-rings 16, 17; and a socket 12 having first inner peripheral portions 122a, 122b into which the bulged portions 18, 19 are fitted, second inner peripheral portions 123a, 123b into which the O-rings 16, 17 are fitted, and third inner peripheral portions 124a, 124b into which the insertion cylinder portions 22, 23 are fitted, and joined at its counter-front-end-direction side to refrigerant flow paths 10, 11. The socket 12 also has fourth inner peripheral portions 127a, 127b formed on the counter-front-end-direction sides of the third inner peripheral portions 124a, 124b, respectively, with their diameters larger than those of the third inner peripheral portions 124a, 124b. The front ends of the insertion cylinder portions 22, 23 are not protruded from the rear end sides of third fitting recessed portions 124a, 124b to the fourth inner peripheral portions 127a, 127b. Thus, the occurrence of refrigerant passing sounds is prevented. COPYRIGHT: (C)2009,JPO&INPIT
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