RETURN-PASS-TYPE HEAT EXCHANGER

• Main Author: NASU KENICHI
• Format: Patent
• Language: English
• Published: 18.04.2000
• Edition: 7
• Subjects: BLASTING; 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; MECHANICAL ENGINEERING; WEAPONS

PROBLEM TO BE SOLVED: To reduce the number of parts of a return-pass-type heat exchanger for facilitating assembly and at the same time easily position an inner fin by diving the inside of a channel with a partition part that is formed integrally with the inner fin and allowing an inner fluid to make a U-turn at the tip of the partition part. SOLUTION: In an oil cooler as a return-pass-type heat exchanger, both the ends in the longer direction of a flat tube 4 are blocked by a side lid 13 and a body 1 is composed, and then an inner fin 2 is inserted into the inside. In this case, the inner fin 2 is formed by bending a metal plate in a corrugated shape, and a number of small holes 3 are formed on the rising and falling surfaces of the corrugation, thus circulating the inner fluid in a direction that crosses the ridge of the corrugation. Then, the partition 4 that is formed in a projecting line where no small holes 3 exist is arranged integrally at a central part in the widthwise direction of the inner fin 2. On the other hand, an inlet 5 and an outlet 6 are formed at one end in the longer direction of the flat tube 4, and an oil pipe 18 is connected to it via a boss 12.