AIR PUMP, MODULE, AND EVAPORATED FUEL PROCESSING SYSTEM

摘要

A space R1 is formed on a downstream side of a check valve 121 by providing a partition plate 139 having a hole 138 in an exhaust opening portion 137 provided in a third housing 132 of an air pump 12 to separate the third housing 132 from the outside. A noise generated from the check valve 121 of the air pump 12 is reduced in the space R.