OPERATION CONTROLLING METHOD OF CIRCULATION PUMP UNIT BUILT IN FILTERING APPARATUS HAVING BACK WASH FLOWING ROUTE

摘要

PURPOSE: To make the way to use of a circulation pump unit convenient by making the unit for a bathtub be stopped automatically after backwash operation is carried out for a prescribed period in the case the operation is forcedly stopped during the circulation operation. ;CONSTITUTION: When circulation operation is carried out by a remote control means 24, firstly, together with jetting operation, filtering operation is carried out according to a set time. In other works, water in a bathtub 4 passes a returning pipe 7, a pump 2, a going pipe 6, a first and a second going pipes 6a, 6b, a flow route opening and closing valve 11, and a circulation metal fitting 8 (shown as a full line arrow) and is circulated while being jetted as a jet flow. During that time, the filtering flow route is switched by switching the flow routes by filtration switching valves 18, 15. When bathing is done and at the same time the operation is stopped by the remote control means 24, the flowing route opening and closing valve 11 is closed to stop the jet flow and at the same time a controller 23 switches the filtration switching valves 18, 15 to form a backwash flow route (shown as a dotted line arrow). Consequently, backwash is carried out for a prescribed period. On the completion of the backwash, the unit is stopped automatically.;COPYRIGHT: (C)1994,JPO&Japio