Abstract: A cup-like device, called a deturbulator, having a solid base portion and vertically oriented finger-like elements extending therefrom is disposed in the oil sump of a refrigeration compressor so that the base portion is spaced from the bottom of the oil sump. The compressor has a mechanical stirrer which is driven through the sump oil when the compressor is in operation to purposefully agitate the oil in order to create a sound attenuating blanket of foam within the compressor shell. The stirrer is disposed interior of the deturbulator so that the turbulence created by the stirrer in the oil agitation process is localized and contained within the interior of the deturbulator. The bottom of the oil sump, wherein debris normally collects, is therefore shielded from turbulence which would otherwise tend to stir the debris into the oil. The finger-like elements of the deturbulator both act to break up any wave action in the sump oil and to facilitate the production of foam to quiet the compressor.

Abstract: A first shim mounted on the shaft extending from the high pressure end face of a screw rotor in a screw compressor establishes the operating clearance between the high pressure end face of the rotor and the high pressure end wall of the compressor's working chamber by fixing the axial position of a bearing group which is likewise mounted on the rotor shaft. A second shim, disposed between the bearing group and a spring biased spacer element, is determinative of the distance the spacer element, and therefore the rotor, can travel in a direction toward the high pressure end of the compressor under the impetus of reverse axial thrust. Contact of the rotor with the high pressure end wall of the working chamber is positively precluded because movement of the spacer element, under the influence of rotor movement toward the high pressure end of the compressor, collapses the biasing spring which causes the spacer element to contact a fixed surface of the compressor.

Abstract: The stream of suction gas and entrained oil flowing from the evaporator in a parallel compressor refrigeration system is directed into a flow separator where it diverges and is expanded into a separation chamber of increased cross-sectional area. A takeoff conduit has an inlet end disposed generally in the center of the separation chamber which faces into the suction gas flow stream. Because of the location and size of the cross-sectional area of the inlet end of the takeoff conduit, a larger portion of the suction gas flow stream and oil entrained therein bypasses the takeoff conduit inlet than enters it. The separation chamber is in flow communication, at its outlet end, with the shell of the one of the compressors which is designated to receive a majority of the suction gas and oil entrained therein. The takeoff conduit is in flow communication with the other of the compressors.

Abstract: An outdoor heat exchanger section has lower and upper cabinet sections between which a generally horizontal louvered lower section top cover is disposed. The sides of the lower cabinet section are louvered to promote the entry and upward movement of air thereinto and through a heat exchange coil disposed about the inner periphery thereof. Air drawn into the lower cabinet section is discharged though the radially louvered portion of the lower section top cover. The radial top cover louvers are angled so as to partially deflect the upwardly flowing air leaving the lower cabinet section to the horizontal. The top of the upper cabinet section is essentially flat and solid and overlies the lower cabinet section top cover louvers so that neither debris nor the elements can enter the lower cabinet section from above.