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Patent Searching and Data


Title:
HOT WATER RECOVERY
Document Type and Number:
WIPO Patent Application WO/2012/054610
Kind Code:
A3
Abstract:
The concepts relate to reducing energy loss associated with hot water systems. One example includes a cold water line and a hot water line and an end use fixture in fluid flowing relation with the cold and hot water lines and configured to control water flow therefrom. This example also includes a water heater having an intake or inlet in fluid flowing relation to the cold water line and an outlet in fluid flowing relation to the hot water line. The example includes an automatic hot water recovery apparatus positioned in fluid flowing relation to the cold water line proximate to the water heater, the automatic hot water recovery apparatus configured to draw hot water back into the water heater from the hot water line subsequent to hot water usage at the end use fixture. The example also includes a selective hot water isolation device positioned in fluid flowing relation to the hot and cold water lines proximate to the end use fixture and configured to allow cold water cross-over into the hot water line subsequent to the hot water usage at the end use fixture. Either the automatic hot water recovery apparatus is configured to delay the hot water draw for a period of time subsequent to the hot water usage or the selective hot water isolation device is configured to delay the cold water cross-over for another period of time after the hot water usage.

Inventors:
HAWS SPENCER KIM (US)
Application Number:
PCT/US2011/056896
Publication Date:
April 25, 2013
Filing Date:
October 19, 2011
Export Citation:
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Assignee:
HAWS SPENCER K (US)
International Classes:
F24D17/00; F24D3/10; F24D19/10
Domestic Patent References:
WO2010103521A22010-09-16
Foreign References:
US4930551A1990-06-05
US5584316A1996-12-17
US20060144455A12006-07-06
US20080035303A12008-02-14
US20060022062A12006-02-02
US20070114297A12007-05-24
Attorney, Agent or Firm:
MITCHELL, Paul W. (P.S.505 W. Riverside Avenue, Suite 44, Spokane Washington, US)
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