Study of chamber cells of suction noise silencers in compressors of household refrigerators Available to Purchase

Noise silencers equipped with chamber cells are widely used to reduce the suction noise of the refrigerator compressors. Cell design significantly determines its acoustic performance depending on the frequency. Therefore, this work provides a theoretical study of the most commonly used chamber cells of various design: chambers with external pipes; chambers with an inlet pipe set into its cavity and with an external outlet pipe; chambers with the set outlet pipe and an external inlet pipe; chambers, in which inlet and outlet pipes are set in it at different lengths. For the first time, transmission matrices of the main elements of chamber cells of silencers are obtained, which take into account the propagation of acoustic waves against the direction of gas flow propagation. These expressions take into account the viscous-temperature and gas-dynamic losses of acoustic energy, as well as friction losses in a turbulent gas flow. Obtained dependences could be used to calculate the suction noise silencers for other similar objects. Chamber cell designs with high acoustic efficiency in a wide frequency range were determined. The research results will allow designers to synthesize high-performance suction silencers for household refrigeration compressors using these designs.