Plate heat exchanger

US5913361A · kind A · utility

Assignee

• ALFA LAVAL CORPORATE AB · SE

Inventors

• Anders Engstrom · Karlskrona, SE
• Ralf Blomgren · Skanör med Falsterbo, SE

Key dates

• Filing date: Dec 10, 1997
• Grant date: Jun 22, 1999
• Expiry date: Dec 10, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F28F2275/04
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

In a plate heat exchanger, having double-walled plate formed heat transfer elements (1, 2), adjacent such heat transfer elements are permanently brazed together by means of three different and spaced brazing joints. A first brazing joint surrounds an area, which covers the heat transfer portions (3, 4) of the heat transfer elements and first inlet openings and outlet openings (8, 9) communicating with a flow passage (6) that is formed between said heat transfer portions. A second joint and a third joint surround respective inlet openings and outlet openings (10, 11), which are closed from communication with said flow passage (6). Leakage areas (16-19; 39), which communicate with the surrounding of the plate heat exchanger, are formed between said first joint and each one of said other joints.