COUNTER REVOLUTION INTERRUPTION STRUCTURE OF A SCROLL COMPRESSOR

摘要

The present invention relates to a reverse rotation prevention structure of a scroll compressor, the piston-type check valve installed in the conventional scroll compressor is a reverse rotation prevention function that is a natural function and when the discharge start when the ratio of the suction pressure and the discharge pressure during operation is above a certain level The discharge start pressure of the piston type check valve is smaller than the discharge pressure, so the flow of the piston type check valve itself becomes unstable due to the unstable pressure distribution around the piston valve. Metallic hitting sound is generated, and this phenomenon is considerably reduced compared to the plate-shaped shank valve. However, the pulsating noise caused by the vertical movement of the piston-type shank valve and the contact with the side of the valve housing are generated during operation. Piston type to prevent or suppress this There have been many problems such as the need to limit the movement of the check valve from the irregular movement to the regular movement. The present invention relates to the check valve of the check valve due to the irregular pressure distribution generated around the anti-rotation mechanism during the operation of the scroll compressor. The flow path guide groove is formed on the outer circumferential surface of the piston-type check valve so that it can be guided in a certain direction without abnormal flow, thereby preventing irregular movement of the check valve, thus preventing the occurrence of noise due to collision with the valve housing side. When the operation stops, the shank valve can quickly close the discharge port to increase the reverse rotation prevention effect.