To provide a compact and low-noise expansion valve.SOLUTION: An expansion valve 1 includes: a valve body 2 arranged in a channel through which fluid passes and having a valve seat 20 and an orifice part 27; a valve body 3 to limit the passage of the fluid by being seated on the valve seat 20 and to allow the fluid to pass through by being separated from the valve seat 20; a coil spring 41 to bias the valve body 3 toward the valve seat 20; and an operation rod 5 inserted in the orifice part 27 and abutted against the valve body 3 at one end thereof. The valve body 2 includes: an intermediate chamber 221 arranged at a downstream side of the fluid from the orifice part 27; and a second channel 22 communicating between the intermediate chamber 221 and an outside. On a cross section passing an axis line X1 of the second channel 22, a distance D1 from the axis line X1 to an orifice part 222 between the second channel 22 and the intermediate chamber 221 is shorter than a distance D2 from the axis line X1 to an inner periphery of the intermediate chamber 221 adjacent to the orifice part 222.SELECTED DRAWING: Figure 2

    【課題】コンパクトでありながら、騒音を低減できる膨張弁を提供する。【解決手段】膨張弁1は、流体が通過する流路内に配置され、弁座20とオリフィス部27とを備えた弁本体2と、弁座20に着座することにより流体の通過を制限し、弁座20から離間することにより流体の通過を許容する弁体3と、弁体3を弁座20に向かって付勢するコイルばね41と、オリフィス部27に挿通され、弁体3に一端を当接させた作動棒5と、を有し、弁本体2は、オリフィス部27より流体の下流側に配置された中間室221と、中間室221と外部とを連通する第2流路22とを有し、第2流路22の軸線X1を通る断面において、軸線X1から、第2流路22と中間室221との間に絞り部222までの距離D1は、軸線X1から、絞り部222に隣接する中間室221の内周までの距離D2より小さい。【選択図】図2


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    Title :

    EXPANSION VALVE


    Additional title:

    膨張弁


    Contributors:

    Publication date :

    2020-09-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16K VALVES , Ventile / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht / F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS



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