| 摘要 |
PURPOSE:To make it unnecessary to provide a changeover valve on the outside of a compressor and to reduce the noises produced by the same, by forming two suction ports in a side plate of the compressor, and providing a port switching mechanism which makes one port function as a discharge port when the other port is fully opened. CONSTITUTION:Suction ports 15, 16 are shaped in a complete form of a suction port. In the state shown by the solid line in the drawing, the suction port 16 is made to function as a discharge port by closing a portion of the suction port 16 by means of a switching mechanism 17. In this state, the direction of rotation of a rotor is counterclockwise. On the other hand, when the rotor is turned in a clockwise direction, the switching mechanism 17 is turned in a clockwise direction around a point 18 until the other port 15 is closed to function as a discharge port as shown by the two-dot chain line in the drawing. By employing such an arrangement, it is enabled to omit a four-way valve or a changeover valve disposed on the outside of the compressor. Further, it is enabled to reduce the noises produced by the compressor and to simplify the piping work for the same. |
