Multi-stage resonator for compressor

A compressor comprising:

• a compressor having an inlet port and at least one discharge port, said at least one discharge port communicating into a resonator chamber, said resonator chamber including a first stage resonator array and a second stage resonator array downstream of said first stage resonator array with a connecting passage intermediate said first and second stage resonator arrays and an exit port leaving the resonator chamber, a flow passage communicates the discharge port to the exit port, and passes through the first and second stage resonator arrays;
• and
• each of said first and second stage resonator arrays including a pair of spaced resonator array sub-portions, with each of said pair of spaced resonator array sub-portions including a plurality of cells extending into housing members, and each cell of the plurality of cells having a bottom wall and an open outer wall communicating with the flow passage, with a plurality of orifices in the open outer wall to communicate the flow passage into each of said plurality of cells, with each orifice of said plurality of orifices having a smaller diameter than a hydraulic diameter of each of said plurality of cells,
• wherein said plurality of orifices are formed in a perforated plate that encloses said plurality of cells,
• wherein said connecting passage has a non-circular flow area, at least over a portion of its length, and defined perpendicular to a flow direction between said first stage resonator array and said second stage resonator array, and
• wherein an average depth into said plurality of cells measured between an inner face of said perforated plate and said bottom wall of said plurality of cells is defined as a first distance, and a second distance is defined as an average hydraulic diameter of said plurality of cells and a ratio of said first distance to said second distance is between 0.025 and 25.