Fluid heating device incorporating transformer secondary winding having a single electrical turn and cooling means optimized for heat transfer
First Claim
1. A fluid heating device comprising a non-conductive magnetic core having a primary winding of electrically conductive wire, a secondary unitary electrically conductive cylinder concentric with said primary winding in close contact therewith through a thermally conductive and electrically non-conductive medium to provide for said conductive cylinder to absorb heat generated by said primary winding when a voltage is applied thereto, said secondary electrically conductive cylinder being a coil formed from a plurality of windings of a metallic conduit positioned in side-by-side contact, said windings being short-circuited along their entire length with one another across said coil, said primary winding having an input connection connectible to a voltage supply source, a variable power control device connected to said input connection, said secondary electrically conductive cylinder having passage means for the flow of a fluid therein at a predetermined flow rate from an input to an output of said passage, said fluid extracting heat from said secondary conductive cylinder and generated by joule effect whereby to heat said fluid and simultaneously cool said cylinder to maintain said secondary electrically conductive cylinder at a substantially constant temperature.
1 Assignment
0 Petitions
Accused Products
Abstract
A fluid heating device which comprises a non-conductive magnetic core having a primary winding of an electrically conductive wire. A secondary electrically conductive jacket surrounds or is concentric with the primary winding in close contact therewith through a thermally conductive and electrically non-conductive medium. The primary winding has an input connection connectible to a voltage supply source. A power control device is connected to the input connection. The secondary electrically conductive jacket has passages therein for the flow of a fluid, at predetermined flow rate, from an input to an output of the passages. The fluid extracts heat from the secondary conductive jacket, generated by joule effect, whereby to heat the fluid and simultaneously cool the jacket to maintain the secondary electrically conductive jacket at a substantially constant temperature.
39 Citations
16 Claims
- 1. A fluid heating device comprising a non-conductive magnetic core having a primary winding of electrically conductive wire, a secondary unitary electrically conductive cylinder concentric with said primary winding in close contact therewith through a thermally conductive and electrically non-conductive medium to provide for said conductive cylinder to absorb heat generated by said primary winding when a voltage is applied thereto, said secondary electrically conductive cylinder being a coil formed from a plurality of windings of a metallic conduit positioned in side-by-side contact, said windings being short-circuited along their entire length with one another across said coil, said primary winding having an input connection connectible to a voltage supply source, a variable power control device connected to said input connection, said secondary electrically conductive cylinder having passage means for the flow of a fluid therein at a predetermined flow rate from an input to an output of said passage, said fluid extracting heat from said secondary conductive cylinder and generated by joule effect whereby to heat said fluid and simultaneously cool said cylinder to maintain said secondary electrically conductive cylinder at a substantially constant temperature.
Specification