Patent ID: 7845463

Claim:
A low-noise machine package comprising: a compressor as a source of noise; a heat exchanger; a cooling fan, which flows air from a suction port to an exhaust port, as a source of noise; a sound absorbing structure; and a casing accommodating the compressor, the heat exchanger, the cooling fan and the sound absorbing structure, and having the suction port and the exhaust port from which noise are leaked to the outside of the casing, wherein the sound absorbing structure has a plurality of polyester fiber sound absorbing cylinders each formed into a circular-cylindrical shape and arranged at a support member in at least either of the suction port and the exhaust port in such a manner that long axes of the sound absorbing cylinders intersect substantially perpendicularly with a flow direction of air flowing through the suction port or the exhaust port, wherein each of the polyester fiber sound absorbing cylinders is a sound absorbing body formed into a circular-cylindrical shape formed of a base material of polyester fiber whose surface is circular-cylindrically wound and combined with polymer nonwoven fabric by powder like hot melt in such a way that a sound absorption coefficient of the sound absorbing cylinder is higher than that of the base material alone.