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发明授权
CN103512288B 一种电子膨胀阀 有权

一种电子膨胀阀
摘要：
本发明公开了一种电子膨胀阀，其活塞部件（4）与其阀针部件（3）处于阀芯座（2）的同一侧，以便冷媒正向流动时，所述活塞部件（4）关闭旁路通孔（212），冷媒经由该阀芯阀口（211）流向竖接管（52）一端，所述阀针部件（3）沿轴向运动调节所述阀芯阀口（211）的开度；冷媒逆向流动时，所述活塞部件（4）沿轴向上移开启所述旁路通孔（212），冷媒经由该旁路通孔（212）流向横接管（51）一端。该电子膨胀阀的结构设计一方面能够保证在冷媒正向流动高压状态下阀针部件能够易于密封阀芯阀口，避免阀针部件被高压冷媒顶开；另一方面能够减少阀座的轴向和径向尺寸，并降低逆向流动时的流阻。
摘要（英）：

An electronic expansion valve is provided, wherein a piston component and a valve needle component are located at the same side of a valve core seat. When refrigerant flows forwards, the piston component closes the bypass through hole, the refrigerant flows to a side of the vertical connecting pipe via the valve core valve port, and the valve needle component moves in the axial direction to regulate an opening of the valve core valve port. When the refrigerant flows reversely, the piston component moves upwards in the axial direction to open the bypass through hole, and the refrigerant flows to a side of the transverse connecting pipe via the bypass through hole. The electronic expansion valve ensures that the valve needle component seals the valve core valve port easily in a high pressure state when the refrigerant flows forwards, and reduces axial and radial dimensions of the valve seat.

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