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发明授权
CN101311588B 针阀及具有该针阀的冷冻循环装置 有权

针阀及具有该针阀的冷冻循环装置
摘要：
本发明提供可以抑制噪音的针阀及具有该针阀的冷冻循环装置。针阀(1)具备阀体(10)和阀心(30)。在阀体(10)中设有形成了阀口(12)的阀座(22)。阀心(30)通过与阀座(22)接触分离而改变开度。阀心(30)的流量调整部(33)被尖细地形成。阀口(12)具备入口密封部(12a)、通道部(12b)和出口部(12c)。入口密封部(12a)和通道部(12b)随着远离阀座(22)的表面(22a)而慢慢地缩小。在经过阀心(30)的轴心的剖面中，如果将流量调整部(33)的外周面之间的夹角设为α，将通道部(12b)的内表面之间的夹角设为β，则β≤α≤β+10度。
摘要（英）：

The invention provides a needle valve for restraining noises and a refrigerating cycle device with the needle valve, which comprises a valve body (10) and a valve core (30). A valve seat (22) of a valve port (12) is formed in the valve body (10). The opening of the valve core (30) is changed through contact segregation with the valve seat (22). A flow adjusting part (33) of a valve core (30) is formed thinly. The valve port (12) includes an inlet sealing part (12a), a channel part (12b) and an outlet part (12c), wherein the inlet sealing part (12a) and the channel part (12b) shrinks by degreealong away from a surface (22a) of the valve seat (22). In a profile of the axle center passing through the valve core (30), if the included angle between the cirumferential surface of the flow adjusting part (33) is set as alpha, and the included angle between the inner surface of the channel part (12b) is set as beta, beta<=alpha<=beta+10 degrees.

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