To provide a bath water cleaning apparatus capable of refreshing filtration performance easily without changing a filter.
A controller 100 controls to pass bath water through a 2nd space 30 toward the 1st space 29 to remove a pre-coat material layer of a spiral filter 40 when it is judged based on the flow rate information from a flow sensor 67 that the filtration performance in a cleaning part 19 is deteriorated. Next, after a pre-coat material is supplied from a pre-coat material supply part 69 to the 1st space 29, the bath water is forcibly feed by a water pump 11 to be passed through the 1st space 29 toward the 2nd space 30 to refresh the pre-coat material layer in the spiral filter 40 by one pass. Then, the filtration performance is easily refreshed without changing the spiral filter 40.
MASUDA KENJI
TAKEUCHI HIROKAZU
OGAWA YUKIHARU
SHIGETA ISAMU
KOSASA TETSUO
OKUMURA HIROYUKI
ICHIKAWA MASAYA
ITO TOSHIYASU
