HEAT EXCHANGER MANUFACTURING METHOD AND HEAT EXCHANGER

• Main Authors: YAMANAKA YASUTOSHI, KAFUKU KAZUAKI, AZEYANAGI ISAO, SANO YUKIHIRO, TERA AKINOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 27.10.2014
• Subjects: BLASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; DIFFUSION TREATMENT OF METALLIC MATERIAL; 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; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; MACHINE TOOLS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; WEAPONS; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To provide a heat exchanger manufacturing method and a heat exchanger capable of ensuring suppressing generation of through holes due to corrosion.SOLUTION: A heat exchanger manufacturing method comprises: an assembling step of assembling tubes 21 and fins 22; and a coating film forming step, executed after the assembling step, of forming a coating film 30 on surfaces of the tubes 21 and the fins 22 by a chemical vapor phase growth method. According to this method, it is possible to suppress generation of through holes in the tubes 21 and the fins 22 due to corrosion. At this time, since the coating film forming step is executed after the assembling step, it is possible to prevent the coating film 30 from being damaged at a time of transporting constituent components or assembling the constituent components together. Furthermore, since the coating film 30 is formed by the chemical vapor phase growth method that is a type of a dry coating method, it is possible to prevent very fine portions in a heat exchanger from being clogged during the coating film forming step. Therefore, it is possible to ensure suppressing generation of the through holes in the tubes 21 and the fins 22 due to the corrosion. 【課題】腐食による貫通孔が生じることを確実に抑制できる熱交換器の製造方法および熱交換器を提供する。【解決手段】チューブ２１およびフィン２２を組み付ける組付工程と、組付工程の後に行われるとともに、チューブ２１およびフィン２２の表面に化学気相成長法によって被膜３０を形成する被膜形成工程とを含んでいる。これによれば、被膜３０により、チューブ２１およびフィン２２に腐食による貫通孔が生じることを抑制できる。このとき、被膜形成工程を組付工程の後に行うので、構成部品の搬送時や構成部品同士の組付時に被膜３０に傷が付くことを防止できる。さらに、ドライコーティング法の一種である化学気相成長法によって被膜３０を形成することで、被膜形成工程時に熱交換器内部の微細部において目詰まりを起こすことを防止できる。したがって、チューブ２１およびフィン２２に腐食による貫通孔が生じることを確実に抑制することが可能となる。【選択図】図５