EXPANSION VALVE

• Main Authors: HAYAKAWA JUNYA, OKUTSU KINYA, KUBOTA KOHEI
• Format: Patent
• Language: English; Japanese
• Published: 18.03.2021
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; COMBINED HEATING AND REFRIGERATION SYSTEMS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

To provide an expansion valve capable of effectively controlling an amount of a refrigerant while inhibiting hunting phenomenon.SOLUTION: In an expansion valve 1, a buffer space BS1 is provided between a return passage 23 and a recessed part 2a in a valve body 2. The return passage 23 and the buffer space BS1 are connected by a first cylindrical hole 2b, and the buffer space BS1 and the recessed part 2a are connected by a second cylindrical hole 2d. The buffer space BS1 is formed by a bottomed lateral hole 230 sealed at an end part by a plug PL and extends in parallel with the return passage 23. An entire length of the buffer space BS1 is larger than an inner diameter of the first cylindrical hole 2b and an inner diameter of the second cylindrical hole 2d.SELECTED DRAWING: Figure 1 【課題】ハンチング現象を抑制しつつ冷媒量を効果的に制御可能な膨張弁を提供する。【解決手段】膨張弁１において、弁本体２における戻り流路２３と凹部２ａとの間には、緩衝空間ＢＳ１が設けられており、戻り流路２３と緩衝空間ＢＳ１とは第１の円筒孔２ｂにより接続され、緩衝空間ＢＳ１と凹部２ａとは第２の円筒孔２ｄにより接続されている。緩衝空間ＢＳ１は、プラグＰＬにより端部を封止された有底横穴２３０により形成され、戻り流路２３と並行して延在しており、緩衝空間ＢＳ１の全長は、第１の円筒孔２ｂの内径、および第２の円筒孔２ｄの内径より大きい寸法を有する。【選択図】図１