US 12,140,384 B2
Heat exchanger with indentations for avoiding stagnant media
Tomas Dahlberg, Helsingborg (SE); and Sven Andersson, Hässleholm (SE)
Assigned to SWEP International AB, Landskrona (SE)
Appl. No. 17/784,259
Filed by SWEP International AB, Landskrona (SE)
PCT Filed Dec. 9, 2020, PCT No. PCT/SE2020/051181
§ 371(c)(1), (2) Date Jun. 10, 2022,
PCT Pub. No. WO2021/133237, PCT Pub. Date Jul. 10, 2021.
Claims priority of application No. 1951549-3 (SE), filed on Dec. 23, 2019.
Prior Publication US 2023/0043151 A1, Feb. 9, 2023
Int. Cl. F28D 9/00 (2006.01); F28F 3/04 (2006.01)
CPC F28D 9/005 (2013.01) [F28F 3/042 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A brazed plate heat exchanger comprising an end plate and a stack of heat exchanger plates provided with a pattern comprising ridges and grooves adapted to form contact points between neighboring heat exchanger plates such that the heat exchanger plates form interplate flow channels for media to exchange heat over the heat exchanger plates, the heat exchanger plates further being provided with port openings for selective fluid communication with the flow channels,
wherein the port openings are surrounded by port opening areas for sealing against a corresponding port opening area of a neighboring heat exchanger plate,
wherein neighboring heat exchanger plates are connected by brazing joints at said contact points,
wherein the end plate is provided with port openings and flat areas around the port openings in a common plane,
wherein a plurality of the ridges of the heat exchanger plates, in an area overlapping any of said flat areas of the end plate, are formed with indentations,
wherein said indentations of a heat exchanger plate adjacent the end plate connect a flow channel, formed between the end plate and the adjacent heat exchanger plate, with a neighboring flow channel, formed between the end plate and the adjacent heat exchanger plate, to allow distribution of said media between them, and
wherein at least one of the indentations is arranged a distance from the flat area around a closest of the port openings, and one of said brazing joints for connecting said neighboring heat exchanger plates is arranged between said flat area around a closest of the port openings and said at least one of the indentations.