Patent ID: 9541333
Date: 2017-01-10
CPC Classifications: F28D,F28F

Claim:
1. A stacked heat exchanger comprising: an outer housing including four header boxes each forming a respective side of the outer housing, each of the four header boxes having upper and lower sides and two lateral sides between the upper and lower sides, and; two cover plates sealing upper and lower openings of the outer housing and each having a rectangular shape; and stack plates that are held between the cover plates, wherein the cover plates contain aluminum, and wherein the stack plates are stacked directly with each other without any solder or brazing therebetween, wherein the two lateral sides of each of the four header boxes are directly welded to one of the two lateral sides of an adjacent one of the four header boxes, wherein one of the two cover plates is directly welded to the upper side of a corresponding one of the four header boxes, wherein another one of the two cover plates is directly welded to the lower side of a corresponding one of the four header boxes, wherein an aluminum-containing Ni alloy is used for the cover plates, wherein the outer housing contains aluminum, and wherein the stacked heat exchanger is a ferritic welded heat exchanger for high temperature applications.