Ceramic heater, heat exchange unit, and warm water washing...

Details Ceramic heater, heat exchange unit, and warm water washing... Ceramic heater, heat exchange unit, and warm water washing...

2011-01-25

2011-01-25

Hoang, Tu B (Department: 3742)

Electric heating

Heating devices

Combined with diverse-type art device

C219S542000, C219S543000

Reexamination Certificate

active

07875832

ABSTRACT:
A ceramic heater, heat exchange unit, and warm water washing toilet seat are provided having excellent temperature rise characteristics and a shortened heating time to reach a predetermined water temperature. A ceramic heater having a pattern watt density of 50 W/cm2and above, and a surface watt density of 25 W/cm2and above has a short start-up time and excellent temperature rise characteristics. Further, the thickness of a core is reduced to between 0.5 mm and 1.9 mm (circular tube thickness is between 1 mm and 2.4 mm), which enables efficient transfer of heat from the ceramic heater to water flowing in the circular tube. Accordingly, a gap between a heat exchanger and the ceramic heater is not necessarily narrowed, such that air bubbles are not likely trapped and breakage of the ceramic heater by thermal shock can be suppressed.

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