COMPACT SPIRAL-THROUGHFLOW HEATING UNIT WHICH CAN OPERATE AT HIGH PRESSURES
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United States of America Patent
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Issued Date -
Feb 24, 2011
app pub date -
Jul 11, 2008
filing date -
Jul 24, 2007
priority date (Note) -
Abandoned
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Abstract
A spiral continuous-flow heater unit for electrical appliances for preparing hot beverages including a tubular support having at least one thick-film electrical heating conductor structure on an outer side thereof; a core element within the tubular support having at least one helically extending web on an external surface thereof, wherein two adjacent web edges of the web and the external surface of the core element together form a flow channel that is substantially sealingly closed off in the outward direction with respect to a flow duct by an inner side of the tubular support; and a first and a second end member each having a connector port which communicates with the flow duct, wherein each of the end members is fixedly connected to the core element at their a respective end of the tubular support to form a water-tight and vapor-tight seal between at least the tubular support and end members.
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