Search International and National Patent Collections

1. (WO2018128757) WATER FILTRATION SYSTEM WITH RECIRCULATION TO REDUCE TOTAL DISSOLVED SOLIDS CREEP EFFECT

Pub. No.:    WO/2018/128757    International Application No.:    PCT/US2017/065882
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Wed Dec 13 00:59:59 CET 2017
IPC: B01D 17/12
C02F 1/00
C02F 5/08
E03C 1/05
G05B 11/06
G05B 19/05
Applicants: A. O. SMITH CORPORATION
Inventors: ZHANG, Hai-Feng
AVERBECK, David, J.
CHENG, Zhaoshan
Title: WATER FILTRATION SYSTEM WITH RECIRCULATION TO REDUCE TOTAL DISSOLVED SOLIDS CREEP EFFECT
Abstract:
A point-of-use water filtration system having an idle mode and a filtration mode, the water filtration system including a feed water inlet, a pump in fluid communication with the feed water inlet via a feed water line, and a semi-permeable membrane having an upstream side and a downstream side. A first portion of the upstream side is in fluid communication with a membrane inlet and a second portion of the upstream side is in fluid communication with the concentrate outlet, and the downstream side is in fluid communication with a permeate outlet. The point-of-use water filtration system also includes a permeate line in fluid communication with the permeate outlet and a filtered water outlet, a concentrate line in fluid communication with the concentrate outlet, a flow path configured to selectively connect the permeate line to the feed water line; and a controller configured to anticipate demand for the filtration mode.