HEAT EXCHANGER AND REFRIGERATION CYCLE DEVICE PROVIDED WITH THE SAME

• Main Authors: YAMAOKA YOSHIKI, KOISHIHARA KAZUTAKA, MACHIDA KAZUHIKO
• Format: Patent
• Language: English; Japanese
• Published: 10.12.2020
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; 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; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; RANGES; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; VENTILATING; WEAPONS

To provide a heat exchanger suppressing deposition of a local scale with a simple means and also having high heat exchange efficiency.SOLUTION: A heat exchanger includes an inner pipe 1, an insertion body 2 inserted into the inner pipe 1, and at least one outer pipe 3 which is fitted on the outer periphery of the inner pipe 1 and through which a second fluid is flown. The insertion body 2 is composed of an axis part 21 and a projection part 22 formed on the outer surface of the axis part 21. A first fluid flows through a spiral flow passage 23 composed of at least the inner surface of the inner pipe 1 and the projection part 22. The spiral flow passage 23 is provided with a thick projection part 22b reducing the area of the flow passage at every prescribed interval in the flow direction of the first fluid.SELECTED DRAWING: Figure 3 【課題】簡素な手段で局所的なスケールの析出を抑制するとともに、熱交換効率の高い熱交換器を提供すること。【解決手段】内管１と、内管１に挿入される挿入体２と、内管１の外周に設けられ、第２流体が流れる少なくとも１本以上の外管３と、を備え、挿入体２は、軸部２１とその軸部２１の外表面に形成された突部２２とから形成され、第１流体は、少なくとも内管１の内面と突部２２とで形成される螺旋状流路２３を流れるとともに、螺旋状流路２３には、第１流体の流れ方向の所定間隔毎に、流路面積を小さくする肉厚突部２２ｂが設けられている熱交換器。【選択図】図３