| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil exchange apparatus which is provided with an additional simple, inexpensive structure to prevent different kinds of oils from mixing. SOLUTION: The oil exchange apparatus 1 has a cleaning pipeline 16 whose one side is open to the outside of the apparatus 1 and the other side is open to the top of a waste oil can 4. The apparatus 1 is subjected to a pipeline cleaning process. According to the cleaning process, the end of a common pipeline 13 disconnected from a tube nozzle 15 is connected to the cleaning pipeline 16 after an oil exchange is over, and a new oil used this time, which fills a new oil pipeline 8 and the common pipeline 13, is collected into a new oil can 2, which is then replaced with a next new oil can 2'. A new oil from the next new oil can 2' is sent toward the waste oil can 4 to push to wash away the used new oil remaining on the inner walls of the new oil pipeline 8 and the common pipeline 8. The next new oil, filling the new oil pipeline 8 and the common pipeline 8, is then returned to the new oil can 2'. COPYRIGHT: (C)2006,JPO&NCIPI
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