METHOD FOR BRAZING PLATE TYPE HEAT EXCHANGER

• Main Authors: WATABE KAORU, TAKAKURA MITSUAKI
• Format: Patent
• Language: English
• Published: 08.12.2000
• Edition: 7
• Subjects: BLASTING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; HEAT EXCHANGE IN GENERAL; HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT; HEATING; LIGHTING; MACHINE TOOLS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WEAPONS; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To make it easy and inexpensive to execute a brazing operation on the occasion of brazing the parts of intersecting points of crests and troughs of corrugations when corrugated-plate-shaped heat transfer plates in a plate type heat exchanger are laid on each other. SOLUTION: A main body 12 whereon first and second heat transfer plates 1a and 1b are set and are positioned and fixed in this state by a jig or the like is provided and a tiltable cover body 13 is provided for the main body 12 so that it can be opened and closed, while a plate 14 for a screen is provided in the central part of the cover body. The plate for the screen is provided with holes corresponding to brazing positions respectively. A brazing material is put on the plate for the screen of the cover body 13 in a closed state and applied onto the heat transfer plates through the holes by a spatula. According to this constitution, it is possible to apply a prescribed amount of brazing material surely and quickly to each part of the intersecting point and also to execute a coating operation by screen printing. Accordingly, the coating operation can be executed easily and can be made inexpensive.