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Patent Searching and Data


Title:
STORAGE ELECTRIC WATER HEATER
Document Type and Number:
Japanese Patent JP2004150688
Kind Code:
A
Abstract:

To provide a storage electric heater capable of suppressing a temperature rise of hot water in a bathtub or a temperature drop of hot water in a tank even when a circulating pump is operated for freeze proofing of bath piping.

When it is judged that air temperature is a predetermined temperature (for example, 4°C) or less in step S1, a flag A is changed to 1 in step S2, and the circulating pump P is operated for a first predetermined time (for example, 45 seconds) in step S3. In step S4, downtime (a second predetermined time) of the circulating pump P is changed in accordance with an outside air temperature and a bathtub temperature, and subsequently, this cycle is repeated.


Inventors:
TAKADA TETSURO
KIDO TERUKI
UEDA NOBUHISA
NAKANO KIYOTAKA
OE TOSHIHARU
Application Number:
JP2002315423A
Publication Date:
May 27, 2004
Filing Date:
October 30, 2002
Export Citation:
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Assignee:
TOTO LTD
International Classes:
F24H1/20; F24H1/18; (IPC1-7): F24H1/18; F24H1/20