Protection and control of continuous boiling water units

Details Protection and control of continuous boiling water units Protection and control of continuous boiling water units

1995-03-14

1997-11-25

Hoang, Tu B.

Electric resistance heating devices

Heating devices

Tank or container type liquid heater

392454, 392451, 392498, H05B 102, F24H 920

Patent

active

056920962

ABSTRACT:
A continuous boiling water unit is disclosed and comprises a water heating tank (1) containing an electric heating element (2) near the bottom of the tank (1) and a level control tank (3) mounted alongside the heating tank (1). An interconnecting steam communication port (21) is located between the level control tank (3) and the heating tank (1), together with a draw-off connection (23) and a flow connection (10). There further comprises an electronic temperature sensor in the form of a thermister (50) operable to sense the temperature of water in the heating tank (1), and upon sensing boiling of the water in the heating tank (1), operable to cause cut-off of the supply to the heating element (2).

REFERENCES:
patent: 3793934 (1974-02-01), Martin
patent: 4354094 (1982-10-01), Massey et al.
patent: 4455477 (1984-06-01), Massey et al.
patent: 4520259 (1985-05-01), Schoenberger
patent: 4602145 (1986-07-01), Roberts
patent: 5001969 (1991-03-01), Moore et al.
patent: 5038752 (1991-08-01), Anson
patent: 5263116 (1993-11-01), Hammond
Patent Abstracts of Japan, vol. 18, No. 101 (C-1168) Feb. 18, 1994 and JP-A-5300831 (Toshiba Heating Appliances Co.) Nov. 16, 1993.

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