HEAT EXCHANGER AND REFRIGERATION CYCLE DEVICE

• Main Authors: FUNADA KAZUYA, ITAKURA SHUNJI, KOMINE KENJI, FUJI TOSHIYUKI, HORIGUCHI MASARU, SHIMADA SOTA, TANAKA JUNYA
• Format: Patent
• Language: English; Japanese
• Published: 09.08.2018
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; HEAT EXCHANGE IN GENERAL; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; WEAPONS

PROBLEM TO BE SOLVED: To suppress a decompressor of a refrigeration cycle device from being blocked by sludge.SOLUTION: On an inner peripheral surface of a heat transfer pipe, a spiral groove is formed, and a height of an inner wall of the groove to a radial direction of the heat transfer pipe is not less than 0.1 [mm]. When an open verandah length of the heat transfer pipe is defined as S, an inclination angle formed by a longitudinal direction of the groove with respect to a pipe axis direction on a cross section of the heat transfer pipe parallel with the pipe axis direction of the heat transfer pipe is defined as θ, and a length of the heat transfer pipe is defined as L, the inclination angle θ is an acute angle, and the open verandah area S×L/cosθ of the heat transfer pipe satisfies the following relation: S×L/cosθ≥0.5 [m].SELECTED DRAWING: Figure 3 【課題】冷凍サイクル装置の減圧器等がスラッジで閉塞されることを抑える。【解決手段】伝熱管の内周面には、螺旋状の溝が形成され、伝熱管の径方向に対する溝の内壁の高さが０．１［ｍｍ］以上である。伝熱管の濡れ縁長さをＳ、伝熱管の管軸方向に平行な伝熱管の断面において管軸方向に対して溝の長手方向がなす傾斜角をθ度、伝熱管の長さをＬとしたとき、傾斜角θが鋭角であり、伝熱管の濡れ面積Ｓ×Ｌ／ｃｏｓθは、Ｓ×Ｌ／ｃｏｓθ≧０．５［ｍ２］を満たす。【選択図】図３