MEMBER FOR HEAT EXCHANGER, HEAT EXCHANGER, AIR CONDITIONER AND REFRIGERATOR

• Main Authors: TAGO EMI, TAJIMA HIDEHARU
• Format: Patent
• Language: English; Japanese
• Published: 30.09.2022
• Subjects: BLASTING; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; HEAT EXCHANGE IN GENERAL; HEATING; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

To realize a high-efficiency member for a heat exchanger while imparting characteristics not found in a metal itself with a film having excellent heat conductivity on the surface of the metal.SOLUTION: A member for a heat exchanger is made of metal, and has a carbon-containing oxide film 112B with fine irregularities 112C provided on a metal surface, where an average distance between the apexes of the protrusions of the fine irregularities 112C is 20 nm or more and 120 nm or less, an average value of the height difference between the apex of the adjacent protrusion and the bottom of a recess is 10 nm or more and 250 nm or less, and at least a part of the surface of the metal oxide film is a hydrated oxide.SELECTED DRAWING: Figure 3 【課題】金属表面に、熱伝導性に優れる被膜で金属自体にはない特性を付与しつつ、高効率な熱交換器用部材を実現する。【解決手段】熱交換器用部材は、金属からなり、金属表面に微細凹凸１１２Ｃが設けられた炭素含有酸化膜１１２Ｂを有し、微細凹凸１１２Ｃの凸部の頂点の平均間隔が２０ｎｍ以上１２０ｎｍ以下で、かつ隣接する凸部の頂点及び凹部の底点の高さの差の平均値が１０ｎｍ以上２５０ｎｍ以下であって、且つ前記金属酸化膜の少なくとも表面の一部が水和酸化物である。【選択図】図３