Abstract: A process to manufacture a cylinder for a rotary hermetic compressor having a rolling piston, of the type presenting a substantially cylindrical tubular body (20) which defines a pair of opposite end faces (21,22) that are parallel to each other; an internal cylindrical wall (23); and an external wall (24) which is spaced away from said internal cylindrical wall (23), said cylinder further presenting a radial vane slot (10) which is provided from said internal cylindrical wall (23), includes the steps of:a) shaping in a unique blank piece a substantially cylindrical tubular body (20);b) providing tension concentration zones in the cylindrical tubular body (20), so as to define a weakening line according to a partitioning diametral plane which passes through the cylinder part that is going to receive the vane slot (10).

Abstract: Suction muffler assembly for hermetic compressors of the type including a cylinder block (4) mounted in the upper part of a hermetic case (3) and provided with a cylinder (10) lodging a reciprocating piston (15); a valve plate (11) attached to an open end of the cylinder (10) and having a suction orifice (11a); a suction muffler assembly attached to the cylinder block (4) and including a hollow muffler body (100) provided with a gas inlet opening (101, 130a) and a gas outlet opening (121); and a suction duct (140) having one inlet end (141) connected to the gas outlet opening (121) and an opposite outlet end (142) in communication with the suction orifice (11a) of the valve plate (11), said hollow muffler body (100) being formed of a lower part (110), presenting an end peripheral edge (117), and a cover upper part (120) carrying the gas outlet opening (121) of the muffler body (100) and including a peripheral lower seating surface portion (127) to be seated onto the end peripheral edge (117) of the lower part

Abstract: A reed valve for a hermetic compressor, comprising a cylinder block (1) having a pair of opposite faces; a cylinder (C) formed in said cylinder block (1) and housing a piston (2); at least one end plate (3) having an outer face (3a) and an inner face (3b) fixed to one of the opposite faces of the cylinder block (1), in order to close a respective end of the cylinder (C), and being provided with at least one pair of axial gas passages (6, 7) communicating the interior of the cylinder (C) with the outer face (3a) of the end plate (3) through a respective read valve (10), which is fixed to the face (3a) of the end plate (3), to which is opened the outlet end (6b, 7b) of the respective gas passage (6, 7), said valve comprising a blade element (10) with a body being formed of a resin that is preferably plastic and reinforced with fiber filaments (20, 21, 22) spaced from each other according to at least one direction relative to the longitudinal axis of the blade element (10).

Abstract: A discharge valve for a reciprocating hermetic compressor of the type comprising a cylinder housing a reciprocally driven piston. A valve plate is mounted on the cylinder and has a discharge orifice the outer face of the valve plate having a recess with a side wall surrounding said discharge orifice and defining a valve seat. A sealing member is axially movable between a closing position against the valve seat. A backstop member is externally attached to the valve plate so as to limit the axial displacement of the opening sealing member. Guide elements for axial displacement of the sealing member are provided around the latter and mounted between the valve plate and the backstop member. There is a resilient deformable means with an end attached to the backstop member and another end opposite to the first one, provided at a plane adjacent to the outer face of the sealing member, opposite to that face sealing against the valve seat.

Abstract: A valve for blocking migration of refrigerant in a system including a compressor having an outlet for the compressed refrigerant and an inlet for the refrigerant to be compressed, the valve having a housing with a inlet passage for receiving the compressed refrigerant and an outlet passage, and a piston serving as the valve element which has a through passage for providing communication between the housing inlet and outlet passages when the valve is to be open. A conduit has one end in communication with the compressor case interior, and preferably with the compressor discharge muffler, and the other end with the valve housing. The valve piston is normally biased to a position to close the communication between the housing inlet and outlet passage and the refrigerant pressure when the compressor starts and is operating is conveyed through the conduit to the valve housing to move the piston to a position to open the communication between the housing inlet and outlet passages.

Abstract: A rotary rolling piston compressor having a hermetic shell in which a cylinder is fixedly mounted. A rolling piston is driven by a crankshaft supported by a bearing pair and carried by the rotor of an electric motor whose stator is fixed internally to the shell. The cylinder has a radial slot in which a vane reciprocates. The vane defines compression and suction chambers, limited axially by the internal faces of the bearings and the chambers having discharge and suction orifices, respectively. The internal face of at least one of the bearings is provided with a groove with one end in communication with the compression chamber and the part on the suction chamber side of the vane in communication with a recess provided on the radial slot surface, on the suction chamber side. The recess extends transversely to the direction of the reciprocating displacement of the vane.

Abstract: A discharge flow blocking valve for a compressor having a sealed housing having a cylinder and a piston for compressing refrigerant gas. A discharge muffler is within the housing and has an inlet opening communicating with the cylinder discharge volume, a first outlet opening communicating with the interior of the sealed housing, and a second outlet opening. The blocking valve has an outer casing with a first driving opening in communication with said second outlet of said discharge muffler, and a second driving opening in communication with the housing interior, an inlet in communication with the interior of the housing and an outlet in communication with a discharge mean extending through the housing.

Abstract: A compressor in which the portion of the suction tube within the housing is rectilinear with a constant diameter and has an internal or external insulating tube, the suction tube being arranged through a positioning socket which is attached to the front cover of the compressor housing and extends inside and outside the housing with the positioning socket outer end being welded around the suction tube at a point away from the housing front cover and from the insulating tube inlet end within the compressor housing.

Abstract: A crankshaft for a hermetic compressor of the type that comprises a piston which is displaced in the interior of a cylinder by action of an eccentric portion of the crankshaft which is rotatively driven by the electric motor of the compressor, so that the outer face of the eccentric portion facing the axial bearing is spaced according to a surface portion defining an inclined outer face portion which produces a hydrodynamic wedge at the crankshaft eccentric portion.

Abstract: A rotary rolling piston type compressor having a cylinder mounted in a hermetic shell and a rolling piston driven by a crankshaft carried by the rotor of an electric motor whose stator is fixed internally to the shell. An external part of the cylinder has a radial slot that houses a slidable vane which defines with the cylinder and the piston compression and a suction chamber. The vane surface facing the suction chamber has a planar surface on its upper portion parallel to the vane surface facing the compression chamber and the lower portion of the surface facing the suction chamber has a relieved, or chamfered, section(s). The chamfered surface(s) develops a hydrodynamic wedge effect upon the vane during downward displacement, increasing the lubricating and stability capacity of the vane against the wall of the slot in which the vane slides, and reduces the area of the vane which is in actual contact with the wall of the slot.

Abstract: Discharge system for rotary rolling piston compressor of the type that comprises a cylinder housing a rolling annular piston and a sliding vane which defines a suction and discharge volumes in the space between the piston and the cylinder and the inner faces of main and sub bearing plates, one of the plates having a discharge valve in communication with the discharge volume and being provided with a suction orifice. A gas outlet means communicates with the interior of the cylinder and has at least two gas intake positions one arranged in the extreme final region of the discharge volume and the other arranged radially set back and angularly advanced relative to the first.

Abstract: A system to dampen high frequency noises in hermetic rotary compressors of the rolling piston type, usually employed in small refrigeration and air conditioning compressors without causing an increase in the cylinder dead volume, and, accordingly, a decrease in the compressor volumetric performance. A resonating chamber is provided in the cylinder or bearing and communication between the compression chamber to the resonator chamber is provided by the vane which rides on the rotating piston as it tilts toward and away from the resonating chamber or passage leading to the chamber.

Abstract: A discharge system for a hermetic compressor of the type that comprises a shell in whose interior a cylinder is housed defining a compression chamber in conjunction with a rolling eccentric piston driven by an electric motor, such cylinder having a discharge orifice in communication with a discharge valve to communicate the compression chamber with a discharge muffler chamber. The discharge orifice has a surrounding wall defining a valve seat on the internal face of the discharge muffler chamber. The discharge valve in the muffler chamber comprises a disc; disc guide means fastened in an inner wall of the discharge muffler chamber; and an elastic biasing element forcing the sealing disc against the valve seat and dimensioned to allow the sealing disc to be displaced off the when a certain pressure in the compression chamber is reached.

Abstract: The type which comprises a motor-compressor unit, suspended inside a housing with suction and discharge connectors and formed by a block, supporting a motor incorporating at least one discharge muffler, one cylinder with head lodging chambers and suction and discharge valves and a suction system admitting refrigerating gas coming from the suction connector of the housing and conveying it to the cylinder. In accordance with the invention, the system comprises a suction muffler (110) and one inside lining element (120) of the suction chamber built in one single hollow and airtight unit, while inside the suction muffler (110), at least two chambers (111, 112) are defined, interconnected one to the other by an internal peripheral communication duct (113), with inlet and outlet ends axially aligned and separated with relation to the outlet end of an internal peripheral inlet duct (115) and a gas outlet opening (116), respectively.