A damper pin in a drum type washing machine is disclosed. An identifier acquisition unit, and a router information acquisition unit, of a management computer acquire a network identifier of a port, and information about the port connection relationship, from a computer and a protocol-conversion-type router. A water outlet port of the exhaust pipe is directed toward an upper portion of the inner wall surface of the water muffler on which exhaust gas discharged from the exhaust pipe. The picture electrodes are driven independently by, for example, a corresponding thin film transistors.