Induction fluid heater

• US 4,602,140 A
• Filed: 11/01/1984
• Issued: 07/22/1986
• Est. Priority Date: 11/01/1984
• Status: Expired due to Fees

• Current Assignee: Mangels Industrial SA (Tecnopar Administradora S/A)
• Original Assignee: Mangels Industrial SA (Tecnopar Administradora S/A)
• Inventors: Sobolewski, Antoni
• Primary Examiner(s): Leung, Philip H.
• Application Number:
  US06/667,463
• Time in Patent Office: 628 Days
• Field of Search: 219/10.51, 219/10.49 R, 219/10.65, 219/10.79, 219/10.75
• US Class Current: 219/630
• CPC Class Codes: H05B 6/108 for heating a fluid

Abstract

The present invention deals with a new and efficient heater for fluids in general, wherein the heat is generated by means of electromagnetic induction directly on the duct where the fluid circulates. The heater as described may be constructed according to two preferred embodiments which generally consist in disposing a magnetic core having a mono, a bi, a tri or a polyphase primary winding and on which is arranged a series of straight tubes disposed transversely or longitudinally in respect to the magnetic core. The tubes are soldered at their ends to compartments which act as reservoirs for the fluids to be heated, and, for the fact of being conductive as the tubes, they function as a secondary on which a short-circuit current is induced by the primary, thus causing the heating of the tubes.

Claims

1. An inductive electric heater for heating a fluid comprising a magnetic core, a primary winding wound on the core adapted to be connected to an alternating voltage source of any given frequency, a tubular secondary winding coupled magnetically to the primary winding by means of the magnetic core, the magnetic core having a plurality of legs on which the primary winding is wound, the secondary winding including a plurality of straight tubes extending between the legs and laterally of the legs outside the core, the tubes extending parallel to the primary winding, fluid reservoirs to which the ends of at least a portion of the tubes are connected, the reservoirs and tubes being non-magnetic and electrically conductive, and means directing fluid into one reservoir and out the other reservoir through the tubes.

2. Apparatus of claim 1 in which all the tubes extend parallel to each other between the two reservoirs.

3. Apparatus of claim 1 in which the tubes extending between the legs intersect the tubes extending laterally of the legs.

4. Apparatus of claim 1 in which the reservoirs include removable covers for opening the reservoirs and exposing the ends of the tubes connected to the reservoirs.