Patent ID: 7775239

Claim:
A buffered rotary valve configured to be connected to a compressor, the buffered rotary valve comprising: a pressure container including a high pressure port, a low pressure port, and a plurality of pulse pressure ports, the high pressure port and the low pressure port formed on an outer surface of the pressure container for connection to an outlet and an inlet of the compressor, respectively, and the plurality of pulse pressure ports formed on a portion of the pressure container and configured to be connected to a freezer; a valve head connected to a driving motor positioned inside the pressure container, the valve head configured to be rotated by the driving motor; a valve seat positioned adjacent the valve head and alternately transferring a fluid having a high pressure and a fluid having a low pressure to the freezer as the valve head is rotated; and a buffer positioned on an outer surface of the valve seat and configured to supply a fluid having a buffer pressure, the buffer pressure between the high pressure and the low pressure, wherein the valve seat comprises: a low pressure path formed to correspond to the low pressure port formed on the outer surface of the pressure container and formed to communicate between the outer surface of the valve seat and a middle portion of an upper surface of the valve seat; a plurality of output paths, each output path formed to correspond to the position of each pulse pressure port formed at the lower end part of the pressure container and formed to communicate between a lower surface of the valve seat and the upper surface of the valve seat; and a plurality of buffer paths, each buffer path formed to correspond to a buffer port formed on the outer surface of the pressure container and formed to communicate between one end of the outer surface of the valve seat and one end of the upper surface of the valve seat.