Abstract: A position sensor is provided, particularly a sensor applicable to a linear compressor, for detecting the position of the piston and preventing the latter from knocking against the head located at the end of its stroke. More particularly, there is provided a sensor, particularly one that is employable in detecting the position of a piston of a compressor, the piston being axially displaceable inside a hollowed body, the compressor comprising a valve blade, the blade being positioned between the head and the hollowed body, the sensor comprising a probe electrically connected to a control circuit, the probe being capable of detecting the passage of the piston by a point of the hollowed body and signaling this to the control circuit. An associated compressor employing such a sensor is also provided.

Abstract: A position sensor (10) is described, particularly a sensor (10) applicable to a linear compressor (15), for detecting the position of the piston (1) and preventing the latter from knocking against the head (3) located at the end of its stroke. One of the objectives of the present invention is to provide a sensor (10) capable of detecting the position of the piston (1), which can solve the problem of collision of the latter with the head (3) altogether and that is easy to build and to install, thus reducing the production and manufacture costs of the compressor (15). The piston (1) being axially displaceable inside a hollowed body (2), the compressor (15) comprising a valve blade (9), the blade being positioned between the head (3) and the hollowed body (2), the sensor (10) comprising a probe (20) electrically connected to a control circuit (12), the probe (20) being capable of detecting the passage of the piston (1) by a point of the hollowed body (2) and signalling this to the control circuit (12).

Abstract: A method of permanently bending a first part of a subject body having non-linear elastic properties about a bending line to a desired angle relative to a second part of the body in which a first set of data is produced from similar bodies of the amount of permanent bending obtained as a function of different amounts of angular displacement of the first part, the first part of a subject body is permanently bent to a first angle different from said desired angle by angularly displacing the subject body's first part by an amount determined by the first set of data and thereafter the first part of the subject body is further angularly displaced from the first angle to permanently bend its first part to the desired angle.

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: Valve for a hermetic refrigeration compressor, having a cylinder block (10) with a cylinder (C) and a piston (20). A valve plate (30) attached to the cylinder block (10) has at least one axial gas passage (31, 32) communicating the inside of the cylinder (C) with the front face (30a) of the valve plate (30) through a respective reed valve at the outlet end (31b, 32b) of the respective gas passage (31, 32). The valve has a blade element (60, 80) and a biasing means (70, 90) disposed between the blade element (60, 80) and the valve plate (30) to displace said blade element to a partial opening position of the valve upon occurrence of pressure balance between the upstream and downstream regions of the valve, the biasing means (70, 90) itself being elastically deformed by the blade element (60, 80) when the valve closes, whenever the gas pressure downstream the valve exceeds the gas pressure upstream thereof.

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: 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.

Abstract: In a compressor which has a connecting rod comprising: a second eye (31) connected to the crank pin (12) and a crankshaft (7) and including a radial projection (32) with a longitudinal slot (33), said longitudinal slot (33) having at least two end faces (35) and two opposite lateral faces (34);a first eye (21) connected to the piston and including a rod (22) with an end portion, said end portion having at least two end faces (25) and two opposite lateral faces (24), said end portion being fitted in said longitudinal slot (33) so as to bring the end faces of the slot (33) and the rod (22) into contact therefore defining the axial distance between the centers of the eyes.According to the invention a clamp (40) preferably of spring steel, is fitted in the housing (28, 29, 38, 39) of the radial projection (32) of the second eye (31) and the end portion of the rod (22).

Abstract: The invention relates to a hermetic refrigeration compressor of the type including a motor compressor unit (1) suspended within a hermetic case (3). The motor compressor unit (1) comprises a cylinder provided with cylinder head (12) defining suction and discharge chambers with their corresponding values, and a suction muffler set (100). According to the invention, the suction muffles set comprises a small muffler shell (110) mounted outside the cylinder head, and an insulating hollow body (120) lining the suction chamber (13) of the cylinder head (12). A strainer device (118) is fixed between the two half parts forming the hollow body (120). This configuration facilitates the assembling of the strainer (118) and guarantees its tight fixation without any kind of fixing frame or ring. This makes it possible to enlarge considerably the area of the strainer, thus avoiding heat transfer from the metal strainer to the suction gas flow when passing throughout the meshes.

Abstract: Horizontal Crankshaft Hermetic Compressor for use in refrigeration appliances. According to the present invention the compressor is fitted out with an oil pump having features of positive displacement, which ensures even at start up moments of the compressor an efficient lubrication of the bearings. The oil pump proposed has low energy consumption and supplies a continuous and adequate oil flow for lubricating the compressor without affecting in any perceivable manner its efficiency. According to the invention, the oil pump comprises a cylindric and eccentric portion (23) of the crankshaft (7) which is disposed with a flexible blade (25) within a cylindrical housing (26). This cylindrical housing (26) is provided in one of the bearings (5,6) supporting the crankshaft (7) or in a front cover (37) of the sub bearing (6).

Abstract: Small compressors for refrigeration usually have a motor-compressor unit suspended within a sealed housing by springs. An electric motor produces the rotation of a crankshaft having on its end portion a crank pin, which by means of a connecting rod produces the reciprocating motion of a piston in the cylinder. Two-piece connecting rods are applied to this type of machine, allowing for a new mounting procedure of the crank pin, connecting rod and wrist pin assembly. The connection of the parts is carried out in the rod of the connecting rod, and it has such a geometrical form that eliminates undesirable transverse deviations in this kind of part, ensuring full integrity of the device, without increasing mass or additional parts that impair functioning of the connecting rod. Furthermore, the fastening process is accomplished through brazing, braze-welding or glueing and can be done in reduced space conditions.

Abstract: The invention relates to a hermetic refrigeration compressor of the type including a motor compressor unit (1) suspended within a hermetic case (3). The motor compressor unit (1) comprises a cylinder provided with cylinder head (12) defining suction and discharge chambers with their corresponding valves, and a suction muffler set (100). According to the invention, the suction muffler set comprises a small muffler shell (110) mounted outside the cylinder head, and an insulating hollow body (120) lining the suction chamber (13) of the cylinder head (12). The refrigerant gas is led from the suction pipe (18) of the compressor case (3) to the inside of the insulating hollow body (120) by means of a flow leading pipe (115) arranged within the small shell (110) and communicating with its inside through radial openings (117, 116).