Electromagnetic induction heating apparatus

An electromagnetic induction heating apparatus comprising a closed tank having side and end walls and including a removable end cover providing a closure for one end thereof, said tank containing a quantity of liquid to be heated, an inlet conduit connected to an inlet opening in said tank and defining a liquid flow path into said tank from a location remote from said tank, an outlet conduit connected to an outlet opening in said tank and defining a liquid flow path out of said tank to a location remote from said tank, a pump connected in series with one of the conduits, at least one electromagnetic induction heater assembly disposed within said tank between said inlet and outlet openings and wholly submerged in the liquid to be heated, said heater assembly including a generally rectangular magnet core having parallel core sections, primary coils wound on said core sections and connected in electrical series, support members attached to opposite ends of said magnet core, a plurality of rods attached to and extending between said support members in spaced relation to said core and in generally parallel relation to said core sections, a spaced apart series of vertically disposed heater plates carried by said rods, said heater plates comprising electrical secondaries in which eddy currents are induced and having openings therein receiving therethrough said core sections and said primary coils wound thereon, said heater plate openings being substantially larger than associated portions of said core sections and said primary coils received therethrough, said rods maintaining said heater plates in spaced relation to each other and in spaced relation to said primary coils and said core sections, means for supporting said heater assembly including mounting brackets attached to said support members at opposite ends of said core, each of said brackets having legs extending outwardly from its associated support member and in the direction of said side wall, a plurality of mounting bosses equal in number to said legs, each of said mounting bosses secured to the inner surface of said side wall and having a slot therein opening in the direction of said one end receiving an outer end portion of an associated leg therein, and fasteners releasably securing said legs to said bosses, and electrical control means responsive to the temperature of the liquid in said tank for energizing said primary coils whereby to induce eddy currents in said heater plates to heat the liquid in said tank and to maintain it at a substantially predetermined temperature.