HEAT EXCHANGER AND ITS MANUFACTURING METHOD

• Main Authors: FUJISAWA HIDEYUKI, SE NAOKI
• Format: Patent
• Language: English; Japanese
• Published: 11.01.2023
• Subjects: BLASTING; 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-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

To provide a heat exchanger for enabling the fixation of a heat transfer pipe to the side wall part of a case and the connection of a connection pipe body to the heat transfer pipe in an easy and appropriate manner, and to provide its manufacturing method.SOLUTION: A heat exchanger HE includes a plurality of heat transfer pipes 2 stored in a case 1 into which heating medium is supplied, connection pipe bodies 6 to which the plurality of heat transfer pipes 2 are connected, expanded pipe parts 20 provided in the respective heat transfer pipes 2 so that predetermined pressure contact parts 23 are formed in the respective heat transfer pipes 2, first peripheral walls 21 provided on the expanded pipe parts 20 so as to be located on the end tip 25 sides of the respective heat transfer pipes 2 further than the pressure contact parts 23, and second peripheral walls 62 located at ends 60 of the connection pipe bodies 6 and adapted to be fitted to the expanded pipe parts 20. The first and second peripheral walls 21, 62 having different cross-section shapes are fitted to each other in such a manner that parts in the peripheral directions of the first and second peripheral walls 21, 62 contact each other and other parts separate from each other.SELECTED DRAWING: Figure 4 【課題】ケースの側壁部に対する伝熱管の固定や、伝熱管に対する接続管体の接続を容易かつ適切に行なうことが可能な熱交換器、およびその製造方法を提供する。【解決手段】加熱用媒体が内部に供給されるケース１内に収容される複数の伝熱管２と、これら複数の伝熱管２を接続するための接続管体６と、各伝熱管２に所定の圧接部２３が形成されるように各伝熱管２に設けられている拡管部２０と、圧接部２３よりも各伝熱管２の端部先端２５側に位置するように拡管部２０に設けられた第１の周壁部２１と、接続管体６の端部６０に位置し、かつ拡管部２０に嵌合される第２の周壁部６２と、を備えている、熱交換器ＨＥであって、第１および第２の周壁部２１，６２は、断面形状が相違しており、第１および第２の周壁部２１，６２の周方向の一部分どうしは互いに接触し、かつ他の一部分どうしは互いに離間した態様で嵌合している。【選択図】 図４