Circulation type hot water supply device

Details Circulation type hot water supply device Circulation type hot water supply device

2007-03-23

2009-10-06

Wilson, Gregory A (Department: 3749)

Liquid heaters and vaporizers

Stand boiler

Fluid fuel burner

C122S406100, C122S014220, C237S019000

Reexamination Certificate

active

07597066

ABSTRACT:
There is provided a circulation type hot water supply device in which a downstream end of a hot water delivering channel6connected to a heat exchanger4of a water heater1is connected to a water supply channel5upstream of the heat exchanger, and a circulating pump25that returns hot water fed from the heat exchanger to the hot water delivering channel to the heat exchanger through the water supply channel is provided in the hot water delivering channel. The device can reliably identify an abnormality when it occurs, such as adhesion of a deposit to an inner surface of a heat absorbing pipe4bto reduce heat exchange efficiency. A diagnosis is started when a hot water delivering tap7is closed and a burner3is subjected to combustion. In the diagnosis, supply of water to the heat exchanger4is first stopped to shut down the burner3. Then, the presence of an abnormality is determined when an amount of increase of a detection temperature from a hot water delivering temperature sensor20reaches a predetermined threshold value or more.

REFERENCES:
patent: 3647136 (1972-03-01), Meier
patent: 3770197 (1973-11-01), Meier
patent: 4501261 (1985-02-01), Tsutsui et al.
patent: 5203500 (1993-04-01), Horne, Sr.
patent: 5571007 (1996-11-01), Ishiguro et al.
patent: 5881952 (1999-03-01), MacIntyre
patent: 6606968 (2003-08-01), Iwama et al.
patent: 7322532 (2008-01-01), Takada et al.
patent: 7360535 (2008-04-01), Kobayashi
patent: 2007/0257122 (2007-11-01), Shimada et al.
patent: 2008/0216770 (2008-09-01), Humphrey et al.
patent: 2003-254615 (2003-09-01), None

Affiliated with

Also associated with

Rating

Circulation type hot water supply device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circulation type hot water supply device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circulation type hot water supply device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4116928