Patent ID: 8409431
Filing Date: 2013-04-02
Classification: B01D

Abstract:
1. A charging apparatus, comprising: a charging liquid tank in which a charging liquid is reserved; a charging liquid passage through which the charging liquid tank communicates with a charging nozzle; a collecting passage that is branched from the charging liquid passage so as to reflux the charging liquid to the charging liquid tank; a charging valve that is provided in a downstream side to a branch portion of the collecting passage of the charging liquid passage; a collecting valve that is provided in the collecting passage; a feed pump that is provided in the charging liquid passage and delivers the charging liquid in the charging liquid tank; a filter that is provided between the feed pump and the branch portion in the charging liquid passage; driving units that are provided in the charging valve and the collecting valve and adjust a degree of opening of each of the valves; a controlling unit configured to control each of the driving units; and a storing unit configured to store a relationship between the degree of opening of the charging valve and the degree of opening of the collecting valve, wherein the controlling unit controls the degree of opening of the charging in valve and the degree of opening of the collecting valve in accordance with the relationship stored in the storing unit such that a pressure in an upstream side and a pressure in a downstream side of the filter may not fluctuate due to operations of opening and closing the charging valve during a charging operation.