Abstract: A system for operational acoustic optimization of a variable speed compressor (2) includes a motor (6), a frequency inverter (3), and a control block (5). The frequency inverter (3) is electrically connected to the synchronous motor (6), an electrical network (4), and the control block (5). The control block (5) is configured to control the speed of the motor (6) and to establish a first switching frequency (F1) and a second switching frequency (F2) of the frequency inverter (3). The frequency inverter (3) is configured to start the variable speed compressor (2) by supplying motor (6) with a signal (9) with the first switching frequency (F1) for the duration of a time period (T1) corresponding to at least one alignment operation period of the motor (6) and to supply the motor (6) with a signal (9) with the second switching frequency (F2) after the time period (T1).

Abstract: The present invention relates to a lubricating oil transport system in a compressor, in which: the rotating shaft (3) has at least one concavity (35) that extends over part of the rotating surface (33) in contact with the internal surface (11) of the rotor (1) and at least one restrictor hole (34) that communicates with the internal region of the rotating shaft (3) and with the concavity (35); the rotor (1) comprises a circumferential channel (12) and at least one radial channel (13) extending through the inner wall (11) of the rotor (1); the radial channel (13) is arranged around the circumferential channel (12); said circumferential channel (12) and the radial channel (13) communicating with the concavity (35); the circumferential channel (12), the radial channel (13) and the concavity (35) transport oil for cooling the upper part of the rotor (1) and the stator (2).

Abstract: The present invention relates to a system and method for operational acoustic optimization of a variable speed compressor (2) comprising a synchronous motor (6), a frequency inverter (3) and a control block (5), such optimization being carried out by modifying the switching frequency of the supply signal (9) of the motor (6) contained in the compressor (2), via a control block (5), only during the aligmnent phase of the motor (6), thus, not impairing the performance of the compressor (2), the thermal management of the inverter (3) and the acoustic performance of the system.

Abstract: The present invention refers to a hermetic reciprocating compressor for mobile application provided with a movement limiting assembly of its compression unit in relation to its hermetic housing, comprising technical and functional characteristics capable of optimizing the limitation of the movement of the compression unit in relation to the hermetic housing of a hermetic reciprocating compressor, reducing at the same time the level and intensity of vibrations and noises arising from this movement limitation.

Abstract: The present invention relates to a suspension disposed between a compression unit and the hermetic housing of hermetic reciprocating compressors for mobile application, such as, for example, application in automotive vehicles and similar, and to the method of assembly of the components that constitute the referred suspension. According to the present invention, it is disclosed a suspension for hermetic reciprocating compressor for mobile application capable of reducing the effects of an eventual and involuntary sudden movement of the compression unit and also of minimizing the transfer of vibrations and noises deriving from the environment outside the hermetic housing to the compression unit.

Abstract: The present invention relates to a suspension disposed between a compression unit and the hermetic housing of hermetic reciprocating compressors for mobile application, such as, for example, application in automotive vehicles and similar, and to the method of assembly of the components that constitute the referred suspension. According to the present invention, it is disclosed a suspension for hermetic reciprocating compressor for mobile application capable of reducing the effects of an eventual and involuntary sudden movement of the compression unit and also of minimizing the transfer of vibrations and noises deriving from the environment outside the hermetic housing to the compression unit.

Abstract: The present invention refers to a hermetic reciprocating compressor for mobile application provided with a movement limiting assembly of its compression unit in relation to its hermetic housing, comprising technical and functional characteristics capable of optimizing the limitation of the movement of the compression unit in relation to the hermetic housing of a hermetic reciprocating compressor, reducing at the same time the level and intensity of vibrations and noises arising from this movement limitation.

Abstract: Resonator arrangement in an acoustic muffler for a refrigeration compressor having a shell (1), inside which is mounted an acoustic muffler comprising a hollow body (10) defining at least one dampening chamber (13), which carries a gas inlet duct (20) and a gas outlet duct (30), each presenting a respective length and having a respective wall thickness, at least one of the gas inlet and gas outlet ducts (20, 30) carrying, extending along at least part of its length, a respective plurality of tube type resonant ducts (40), each resonant duct (40) presenting a first end (41), open to the interior of the respective gas duct (20, 30) and a second end (42), opposed to and spaced from the first end (41), each said resonant duct (40) being dimensioned to present a determined length and a determined diameter, which are calculated to define a certain reactive impedance and a certain dissipative impedance for the acoustic muffler, in a determined frequency band.

Abstract: Resonator arrangement in an acoustic muffler for a refrigeration compressor having a shell (1), inside which is mounted an acoustic muffler comprising a hollow body (10) defining at least one dampening chamber (13), which carries a gas inlet duct (20) and a gas outlet duct (30), each presenting a respective length and having a respective wall thickness, at least one of the gas inlet and gas outlet ducts (20, 30) carrying, extending along at least part of its length, a respective plurality of tube type resonant ducts (40), each resonant duct (40) presenting a first end (41), open to the interior of the respective gas duct (20, 30) and a second end (42), opposed to and spaced from the first end (41), each said resonant duct (40) being dimensioned to present a determined length and a determined diameter, which are calculated to define a certain reactive impedance and a certain dissipative impedance for the acoustic muffler, in a determined frequency band.

Abstract: A suction muffler for a hermetic compressor, comprising a hollow body (10,20) provided with gas inlet and gas outlet nozzles (12,22) and, internally, with a plurality of chambers (C1, C2, C3) and a duct (T) having an end connected with and opened to the gas inlet nozzle (12), median windows (45,55), which are longitudinally spaced from each other and opened to respective chambers (C1, C2), and an opposite end opened to a last chamber (C3), which is maintained opened to the gas outlet nozzle (22). The last chamber (C3) is partially divided in two volumes with different shapes and dimensions, the opposite end of the duct (T) projecting to the inside of the last chamber (C3), both the gas outlet nozzle (22) and the opposite end of the duct (T) being opened to the larger volume of the last chamber (C3).

Abstract: A suction muffler for a hermetic compressor, comprising a hollow body (10,20) provided with gas inlet and gas outlet nozzles (12,22) and, internally, with a plurality of chambers (C1, C2, C3) and a duct (T) having an end connected with and opened to the gas inlet nozzle (12), median windows (45,55), which are longitudinally spaced from each other and opened to respective chambers (C1, C2), and an opposite end opened to a last chamber (C3), which is maintained opened to the gas outlet nozzle (22). The last chamber (C3) is partially divided in two volumes with different shapes and dimensions, the opposite end of the duct (T) projecting to the inside of the last chamber (C3), both the gas outlet nozzle (22) and the opposite end of the duct (T) being opened to the larger volume of the last chamber (C3).

Abstract: In a compressor there is a hermetic case (1) having a high pressure gas outlet (1a) that houses a cylinder block (3) defining a gas suction chamber (7) and a gas discharge chamber (8). A main gas discharge tube (9) has an inlet end (9a) in fluid communication with the gas discharge chamber (8) and an outlet end (9b) communicating the gas discharge chamber (8) with the gas outlet (1a) of the case. At least one gas discharge auxiliary tube (10) is provided with an inlet end (11) receiving gas from the discharge chamber (8) and an outlet end (12) to provide the gas to the gas stream flowing in the main gas discharge tube.