Electrical resistance water heating device, particularly for beverage preparation machines,申请号US19790003917-传众专利搜索

Electrical resistance water heating device, particularly for beverage preparation machines

申请公布号：US4343988(A)

申请号：US19790003917

申请日期：1979.01.16

申请公布日期：1982.08.10

申请人：

FIRMA FRITZ EICHENAUER

发明人：ROLLER, HANNO;OHNMACHT, HELMUT;LIEBER, LUDWIG;NAUERTH, KARL-HEINZ

分类号：A47J31/54;F24H1/12;H05B3/42;(IPC1-7):H05B3/02;A47J31/44

主分类号：A47J31/54

摘要：An electrical resistance water heating device, particularly intended for use in coffee or other beverage preparation machines, includes a solid metal heating plate having planar upper and lower surfaces. A fluid throughflow duct is formed between the upper and lower surfaces and includes at least two elongated, spaced, side-by-side branches having corresponding ends interconnected by a connecting conduit to form a continuous fluid flow path from a water inlet to a water outlet. An elongated slot is formed between each pair of side-by-side branches and at least one plate-shaped planar PTC heating element is accomodated within each elongated slot with each of the opposing surfaces thereof directed toward a respective one of the pair of side-by-side branches between which the duct is formed. The spaces between the heating element and walls of the slot are filled with a hardenable electrically insulative filling of good heat conductivity.