Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Patent
1989-12-27
1991-11-19
Reynolds, Bruce A.
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
392339, 392441, 392449, 392458, 392465, 392471, F24H 118
Patent
active
050671707
ABSTRACT:
An electric water warming system generally comprises a cylindrical first water storage tank to be installed in a vertical fashion, a water feed pipe connected to a bottom portion of the first water storage tank for feeding water therein, and a hot water flow-out pipe connected to a top portion of the water storage tank for flowing out hot water therefrom. A temperature of hot water stored in the water storage tank is detected by a detecting device at a plurality of levels thereof and a water feed side and a water flow-out side are connected through a circulation pipe. A second water storage tank is incorporated in the circulation pipe and a heater is disposed in the second water storage tank. A temperature of the hot water in the second tank is detected by another detecting device disposed at an outlet portion of the second water tank. A circulation pump is incorporated in the circulation pipe at a portion upstream of the second water storage tank. The detecting devices are connected to a controlling unit for controlling the heater and the circulation pump to securely maintain the hot water of the predetermined temperature in the first hot water storage tank without exhaustion.
REFERENCES:
patent: 1269053 (1918-06-01), Clark et al.
patent: 1715035 (1929-05-01), Hoyt
patent: 4044949 (1977-08-01), Morawetz et al.
patent: 4242569 (1980-12-01), Kayser
Nagashima Seiko
Serizawa Takanobu
Hoang Tu
Kabushiki Kaisha Toshiba
Reynolds Bruce A.
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