High efficiency ultra-pure fluid heater

Electric resistance heating devices – Heating devices – Continuous flow type fluid heater

Patent

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Details

392492, F24H 110

Patent

active

059304588

ABSTRACT:
An apparatus for heating a fluid such as ultra-pure de-ionized (UPDI) water is disclosed. The fluid heater includes an intermediate body portion, a bottom end cap assembly secured to one end of the intermediate body portion, and a top end cap assembly secured to the other end of the intermediate body portion. The intermediate body portion includes a number of concentric quartz tubes wherein a first quartz tube is spaced radially inwardly of a second quartz tube to define an inner fluid pathway for heating UPDI water while flowing through the inner fluid pathway. A third quartz tube is spaced radially outwardly of the second quartz tube and radially inwardly of a fourth quartz tube to define an outer annular fluid pathway for further heating the UPDI water received from the inner fluid pathway. A resistive heating element is interposed between the second and third quartz tubes for heating the UPDI water by means of conduction, convection and heat radiation with a heating efficiency approaching 100%.

REFERENCES:
patent: 4762980 (1988-08-01), Insley
patent: 4835365 (1989-05-01), Etheridge
patent: 5054107 (1991-10-01), Batchelder
patent: 5054108 (1991-10-01), Gustin et al.
patent: 5396574 (1995-03-01), Base et al.

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