Title:
WATER FILTRATION SYSTEM WITH RECIRCULATION TO REDUCE TOTAL DISSOLVED SOLIDS CREEP EFFECT
Document Type and Number:
WIPO Patent Application WO/2018/128757
Kind Code:
A3
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.
Inventors:
ZHANG HAI-FENG (US)
AVERBECK DAVID (US)
CHENG ZHAOSHAN (CN)
AVERBECK DAVID (US)
CHENG ZHAOSHAN (CN)
Application Number:
PCT/US2017/065882
Publication Date:
August 09, 2018
Filing Date:
December 12, 2017
Export Citation:
Assignee:
SMITH CORP A O (US)
International Classes:
B01D17/12; C02F1/00; C02F5/08; E03C1/05; G05B11/06; G05B19/05
Domestic Patent References:
| WO2012083390A2 | 2012-06-28 |
Foreign References:
| US20140181553A1 | 2014-06-26 | |||
| US20100140095A1 | 2010-06-10 | |||
| US20090194478A1 | 2009-08-06 | |||
| US20050103717A1 | 2005-05-19 |
Other References:
See also references of EP 3551310A4
Attorney, Agent or Firm:
JONES, Daniel, S. (US)
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