COMPRESSORY GROUP OF DOMESTIC OR COMMERCIAL FRIGHTENING MACHINERY AND DOMESTIC OR COMMERCIAL FRIGHTENING MACHINERY

摘要

Described is a compressor unit (10) of a refrigerating machine (100) for domestic or commercial use which comprises a rotary compressor (11) having:- a compression element (12),- a BLDC or BLAC motor (13), connected to said compression element (12) to actuate it,- a control device (16) connected to the motor (13), for driving it at a variable speed;- a housing (17) which encloses the motor (13) and the compression element (16) and which has a side wall (20) inside of which the stator (14) of the motor (13) is fixed.The compressor unit (10) also comprises an operating shell (21) covering the housing (17) and in thermal contact with the side wall (20).The operating shell (21) is configured in such a way as to dissipate heat transmitted to it by the housing (17) and in such a way as to contrast the transmission through it of sound waves having a frequency of between 4 kHz and 16 kHz or to absorb or dissipate the sound waves.