| 摘要 |
PURPOSE: A flow-channel switching apparatus for cleaning a heat-exchanger is provided to simplify the structure of a pipe by omitting a reverse-flowing pipe and an opening-closing valve for the reverse-flowing pipe. CONSTITUTION: A flow-channel switching apparatus includes a main body(100), a discharging pipe(200), a plurality of circulating pipes(300B), and a connecting bent pipe. An inlet(100a) is formed on the lower side of the main body. The discharging pipe is installed on one side of the main body and is in connection with a space of the main body. The circulating pipes are installed on the other side of the main body. Fluid is transferred between the space of the main body and a heat-exchanger through the circulating pipes.
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