HEAT EXCHANGER, HOT WATER SUPPLY DEVICE, AND METHOD OF MANUFACTURING HEAT EXCHANGER

• Main Authors: NONOGAKI MASAYUKI, MORIMOTO MASAKAZU, KITAGAWA SHINYA
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2015
• Subjects: BLASTING; CLADDING OR PLATING BY SOLDERING OR WELDING; COMBINED HEATING AND REFRIGERATION SYSTEMS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL; HEAT EXCHANGE IN GENERAL; HEAT PUMP SYSTEMS; HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MACHINE TOOLS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; RANGES; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; SOLDERING OR UNSOLDERING; TRANSPORTING; VENTILATING; WEAPONS; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To provide a heat exchanger in which deformation of a tube in a manufacturing process can be suppressed.SOLUTION: A first heat transfer tube 41 is composed of a metallic material having hardness higher than that of aluminum, and has a flat cross-sectional shape in which a plurality of passages are formed for flowing a first fluid. A second heat transfer tube 40 is composed of a material including copper as its main component, and has a flat cross-sectional shape in which a single passage is formed for flowing a second fluid. A heat exchanger 4 includes a spiral laminate 42 formed by holding the second heat transfer tube 40 between the flat portions 411 of the first heat transfer tube 41 and spirally winding and laminating them as a whole. The spiral laminate 42 is integrally formed by soldering contact parts of the first heat transfer tube 41 and the second heat transfer tube 40. The spiral laminate 42 is constituted by disposing the first heat transfer tubes 41 at both ends in the axial direction Z. 【課題】製造過程でのチューブの変形を抑制することができる熱交換器を提供する。【解決手段】第１伝熱管４１は、アルミニウム以上の硬さを有する金属材料からなり、断面外形が扁平状で内部に第１流体が流通する複数の通路を形成する。第２伝熱管４０は、銅を主成分とする材料からなり、断面外形が扁平状で内部に第２流体が流通する単一の通路を形成する。熱交換器４は、第１伝熱管４１の平坦部４１１間に第２伝熱管４０を挟持して全体として螺旋状に巻回積層してなる螺旋積層体４２を備える。螺旋積層体４２は、第１伝熱管４１と第２伝熱管４０との接触部分がろう付け接合されて一体に形成される。螺旋積層体４２は、軸方向Ｚの両端に第１伝熱管４１を配して構成される。【選択図】図２