Device for removing dirt and corrosion from heat exchanger cores

Claim 1

A portable device for cleaning and removing corrosion from the cores of heat exchangers having in combination; a small compact container for holding an erosive and cleaning liquid, a support mounting associated with said container when filled for fixedly supporting a motor-driven immersion-type recirculating pump, an immersion-type pump at least partially supported from said support mounting and having a pump impeller disposed in operation within the lower portion of said container, said pump having a liquid intake and a liquid discharge, said discharge extending exteriorly of said container, a pair of liquid passages including said discharge connectible by conduits with the intake and discharge respectively of the core of a heat exchanger, means for reversing the discharge and intake through said liquid passages, said last-mentioned means comprising a valving mechanism between said passages and the discharge of said pump for directing and reversing flow of erosive liquid under pressure through said heat exchanger core with recirculation through said container, said valving mechanism comprising an elongate valve housing, a conduit in communication with the discharge of said pump communicating intermedially of said housing and disposed between said liquid passages, a pair of return passages adjacent the respective ends of said valve housing, and a longitudinally shiftable valve carrying member adapted when in one position to communicate said conduit with one of said liquid passages and when in a second position to communicate said conduit with the second of said liquid passages.