| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sealing device for a piping terminal of a refrigerating device that not only increases the adhesion of a sealing plug to a pipe end, but also facilitates connection work at a connection when the sealing plug is removed and the pipe is connected to other refrigerant piping. <P>SOLUTION: The sealing device A seals each of an inlet side and an outlet side piping terminal of a refrigerating device, which is filled with a fluorohydrocarbon refrigerant including no chlorine and with refrigerating machine oil using, as base oil, oil of high polarity such as polyol ester oil and polyol ether oil, and which constitutes a series refrigerating circuit comprising, in interconnecting fashion, a refrigerant compressor, a condenser, a receiver tank, an accumulator an the like each having an inlet pipe and an outlet pipe. The sealing device A comprises a projection 53 positioned in a piping terminal at a given distance from the end of a pipe 51, and the plug 41 of rubber removably mountable in the pipe end and having a groove 48 in which the projection 53 fits. <P>COPYRIGHT: (C)2003,JPO</p> |
