| 摘要 |
PURPOSE:To enable a valve to respond to both large and small variations in refrigerant flow instantaneously, by controling an opening of refrigerant passage hole in proportion to the magnitude of courrent flow by means of a piston having a tepered section. CONSTITUTION:A cylinder member 8 is installed in fixed condition in a refrigerant passage 7a communicating connection tubes 13 and 14 of valve main body 7 relatively, and a refrigerant passage hole 9 opened to the connection tube 13 is set up arround said cylinder member. The end of a piston 10 having a small diameter is slidingly engaged inside the cylinder member 8, and the piston 10 has a tapered section 11 near the center part connected to the small diameter section. Thus, an electromagnetic force in proportion to the magnifude of the current flow to a coil 5 is exented on the piston 10. As a result, the refrigerant flow can be controlled in proportion to the magnitude of the current flow by changing the form of the refrigerant passage hole 9. |
