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A continuous flow or flash electric water heater, for example for use in a coffee making machine, includes a compound heating structure made up of at least two elongated generally parallelepyred shaped massive heating bodies of a material having a high thermal conductivity, such as brass. Each body

A continuous flow or flash electric water heater, for example for use in a coffee making machine, includes a compound heating structure made up of at least two elongated generally parallelepyred shaped massive heating bodies of a material having a high thermal conductivity, such as brass. Each body has at least one heat input face and a longitudinal passage for flow of water to be continuously heated. The bodies are positioned side-by-side with the passages parallel to each other and with a heat input face of each body facing a heat input face of the next adjacent body. At least one flat PTC electric heating element is positioned between each four of facing heat input faces and a casing made up of two elongated channel-like casing halves, each U-shaped in cross section and having two side flanges, houses the heating structure and forces the bodies together with the heating elements therebetween. The side flanges of the casing halves are overlapped and fixedly secured together along their entire length by a permanent soldered, welded or crumped metal joint so that the bodies and PTC heating elements within the casing are acted upon by a controlled force, transmitted by the casing through the bodies, normal to the heat input faces, for the full life of the water heater. The flow passage can be formed by a hair-pin shaped continuous pipe nested in a groove in the bodies or by a hole running through each body and joined to form a continuous flow path by aligned openings in the facing heat input faces.

대표청구항 ▼

A continuous flow heater having a compound heating structure made up of at least two elongated generally parallelpiped-like shaped bodies of material with a high thermal conductivity, each such body having at least one heat input face and a fluidway running through it for fluid to be continuously he

A continuous flow heater having a compound heating structure made up of at least two elongated generally parallelpiped-like shaped bodies of material with a high thermal conductivity, each such body having at least one heat input face and a fluidway running through it for fluid to be continuously heated, the bodies being positioned side-by-side with a heat input face of each body facing a heat input face of the next adjacent body and with the fluidways parallel to each other, at least one heating element positioned between each pair of facing heat input faces, and a casing forcing the bodies together with the heating element therebetween, wherein said casing is made up to two elongated channel-like casing halves, each half being U-shaped in cross section and having two side flanges running out from a floor part along the length of said bodies, the flanges of one casing half being permanently fixedly joined with those of the other casing half along substantially the entire length of the flanges so that the bodies and the heating element within the casing are acted upon by a force, transmitted by said casing through said bodies, normal to said facing heat input faces.