| 摘要 |
PURPOSE: A self-sealing coupling is provided to make the flow of a refrigerant smooth and to effectively prevent leakage of the refrigerant due to an internal pressure by firmly fixing a venturi tube and compacting the structure. CONSTITUTION: A self-sealing coupling body comprises a nut housing(20) having an installation space and a combining recess, an insertion pipe(30) inserted to the combining recess of the nut housing and equipped with an installation space, an operating unit(40) supported on a supporting unit(50) and elastically combined to a spring, coupling pipes(60,60') combined to both sides of the nut housing and the insertion pipe and combined with a screen body, and a connecting pipe(70) fitted to the outer face of the insertion pipe and connected to the nut housing. The operating unit connecting and disconnecting smooth flow of a refrigerant is combined to the inside of the coupling body. Thus, compatibility is applied to the operating unit and combination of the coupling pipes is tight. Therefore, leakage of a refrigerant is prevented surely.
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