| 摘要 |
PURPOSE: A fitting device for coupling different kinds of pipes for refrigerant is provided to reduce working hours for connecting pipes and enhance the strength and durability of a connecting part. CONSTITUTION: A fitting device for coupling different kinds of pipes for refrigerant comprises a connecting member(10), a nut member(20), a back ferrule(30), a seat(40), and a fastener(50). The connecting member comprises a connecting screw part(11a), a slope part, a horizontal part, and a central part. The nut member is composed of a nut body(21) and a nut extension part(22). A groove is formed on the inner circumferential surface of the nut extension part in a circumferential direction. A stopper is formed on the inner side of the groove. The back ferrule is inserted into the nut member. The seat has a ring shape and is installed on the interface between the horizontal part and the central part of the connecting member. The fastener is formed from an insulating material.
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