US 11,938,782 B2
Heat exchanger with integrated electrical heating element
Brian E. Cheadle, Brampton (CA); Michael J. R. Bardeleben, Oakville (CA); Jeffrey O. Sheppard, Milton (CA); and Benjamin A. Kenney, Oakville (CA)
Assigned to DANA CANADA CORPORATION, Oakville (CA)
Appl. No. 16/977,796
Filed by Dana Canada Corporation, Oakville (CA)
PCT Filed Mar. 7, 2019, PCT No. PCT/CA2019/050283
§ 371(c)(1), (2) Date Sep. 2, 2020,
PCT Pub. No. WO2019/169502, PCT Pub. Date Sep. 12, 2019.
Claims priority of provisional application 62/639,560, filed on Mar. 7, 2018.
Prior Publication US 2020/0398634 A1, Dec. 24, 2020
Int. Cl. B60H 1/00 (2006.01); F24H 1/10 (2022.01); F28F 3/12 (2006.01)
CPC B60H 1/00278 (2013.01) [F24H 1/105 (2013.01); F28F 3/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A heat exchanger, comprising:
(a) a fluid flow passage adapted for flow of a fluid, the fluid flow passage having an inlet and an outlet;
(b) a first plate and a second plate in opposed facing relation to one another, wherein each of the first plate and the second plate are thermally conductive, have an inner surface facing inwardly toward the fluid flow passage and an outer surface facing outwardly from the fluid flow passage, wherein the fluid flow passage is defined by a space between the inner surface of the first plate and the inner surface of the second plate;
(c) a first electrical heating element located outside the fluid flow passage and adjacent to the outer surface of the first plate, such that heat produced by the first electrical heating element is transferred through the first plate to the fluid in the fluid flow passage during use of the heat exchanger;
wherein the first electrical heating element has a thickness between 1 μm and about 1000 μm;
wherein the first electrical heating element comprises an electrically insulating dielectric base layer which is closest to the outer surface of the first plate, and an electrically resistive heater layer on the dielectric base layer; and
(d) a heat sink plate having an inner surface which is fixed to the outer surface of the first plate by a metallurgical bond, and an outer surface to which the first electrical heating element is applied with the electrically insulating dielectric base layer of the first electrical heating element in contact with and thermally bonded to the outer surface of the heat sink plate;
wherein the heat sink plate is thicker than either of the first plate and the second plate; and
wherein the electrically insulating dielectric base layer comprises thermally conductive, electrically insulating composite layer comprising a polymer mixed with a particulate filler material.