Heat exchanger for use in cooling liquids

An apparatus for heat exchange, comprising:

• a) at least one fluid inlet;
• b) at least one fluid outlet;
• c) a first outer plate and a second outer plate, wherein each of the first outer plate and the second outer plate has an inner surface and an outer surface;
• d) an inner layer, wherein the inner layer is sealedly sandwiched between the first and second outer plates, wherein the inner layer comprises a flow portion, wherein the flow portion includes a corrugated sheet material portion, and wherein the inner layer at least in part defines at least one series of fluid channels, and wherein each series of fluid channels of the at least one series of fluid channels has a plurality of fluid channels, and wherein each fluid channel of the plurality of fluid channels of the each series of fluid channels of the at least one series of fluid channels is
• defined in part by the inner surface of one of the outer plates and by the corrugated sheet material portion of the inner layer, and
• has a single fluid inlet of the at least one fluid inlet and a single fluid outlet of the at least one fluid outlet so that fluid entering the single fluid inlet of the at least one fluid inlet flows through the each fluid channel and exits the each fluid channel via the single fluid outlet of the at least one fluid outlet,
• and wherein the at least one series of fluid channels makes up at least one flow path between the at least one fluid inlet and the at least one fluid outlet;
• and,
• e) at least one scraper for scraping the outer surface of at least one of the first outer plate and the second outer plate, the scraper being mounted in direct contact with and movable relative to the outer surface of the at least one first outer plate and the second outer plate.