Abstract: The piston is provided with a pair of radial holes opened to an external circumferential recess and lodging and retaining one respective end of a pin, to which is coupled a driving mechanism to reciprocate the piston inside a cylinder. The radial holes are completely sealed in order that the axial extension of a bottom radial gap provided by a bottom bearing surface of the piston work together with the axial extension of a top radial gap provided by a top bearing surface to provide the required leakage restriction of the refrigerant gas and also the required bearing of the piston inside the cylinder. The axial extension of each of the top bearing surface and of the bottom bearing surface is insufficient to provide by itself said required leakage restriction of the refrigerant gas.

Abstract: Disclosed is a system and method of controlling and triggering a TRIAC by actuating a load with any power factor from a single short-duration pulse at the gate of the TRIAC.

Abstract: An electronic device is described, which comprises an envelope comprising a closed chamber and a printed-circuit board. The printed-circuit board is positioned in the chamber and defines a dissipation chamber. The printed-circuit board comprises at least one electronic device positioned in the dissipation chamber. The dissipation chamber comprises a filler simultaneously in contact with the electronic component, the printed-circuit board and a dissipation film.

Abstract: The present invention relates to a system of controlling a piston in a linear compressor, a method of controlling a piston in a linear compressor, as well as a linear compressor, particularly applicable to cooling systems that may include, for instance, refrigerators, air-conditioning systems and the like.

Abstract: A system for closing a suction muffler of a hermetic compressor, the suction muffler including: a hollow base; a cover to be coupled to the hollow base, the parts defined by the hollow base and the cover including respective mutually seatable peripheral flanges, which are shaped to define, jointly, an internal channel extended along at least part of the circumferential extension of the peripheral flanges and which is opened to the opposite external faces of the latter by means of throughbores axially aligned to each other in pairs, each pair of throughbores maintaining a circumferential distance in relation to an adjacent pair of throughbores, the throughbores of each pair and the internal channel being filled with a gasket of injected material, which projects outwardly from the throughbores so as to define an axial lock portion.

Abstract: A centrifugation injection mold comprising: a lower mold portion having a basic block the lower portion of which is mounted to and rotates within bearing means that are affixed to a machine structure, a plurality of axial columns the bottom portions of which are affixed around the outer portions of the basic block, and a moveable block defining a lower mold cavity and being mounted in a sliding relationship to the axial columns, in order to be axially displaced between an open mold position and a closed mold position; an impelling means operatively associated with the machine structure and with the moveable block for displacing the moveable block to the open mold position against the action of an elastic means; a locking means mounted to each axial column; and an upper mold portion to be removably seated on the axial columns and affixed thereto by the locking means in a closed mold position.

Abstract: A cooling system for cooling an ambient to be cooled, a cooler and a method of controlling a cooling control system are described. The cooling control system comprises a variable capacity compressor and a controller, the controller measuring the load of the compressor by means of the measurement of the electric current and verifying the temperature condition in the cooler ambient and actuating on the cooling capacity of the compressor, the compressor being controlled to actuate in cycles, the cooling capacity being altered in function of an evolution of the load of the compressor along the cooling cycles in combination with an evolution of the temperature condition in the cooled ambient.

Abstract: An electronic circuit for starting a single phase induction motor, of the type containing a rotor and a stator with at least one running coil (B1) and one starting coil (B2), for operating jointly with an alternating current source (F), comprising: a trigger electronic switch; a trigger circuit (TR) of said trigger electronic switch; and a blocking circuit (BL) for controlling the trigger pulses of the trigger electronic switch, said blocking circuit (BL) sustaining its blocking state while there is voltage being induced to the coils of the motor (M) by rotation of the rotor, maintaining said blocking state for a certain time after said induced voltage has been substantially reduced.

Abstract: The present invention provides a piston lubrication system for a reciprocating compressor with a linear motor. The piston lubrication system includes an oil sump defined within a hermetic shell, and a cylinder affixed within the hermetic shell. A radial gap is defined by a piston located within the cylinder. A pump supplies oil from the oil sump to the radial gap via the oil supply duct and oil return duct.

Abstract: A linear motor and a linear compressor including said motor. The linear motor comprises a set of inner laminations (90), forming the stator, mounted around the outer circumference of a fixed member (60), and a set of outer laminations (30) mounted spaced from the inner laminations (90). An actuator (85) is connected to a movable member (80) and carries a magnet member (86) in the space defined between the inner laminations (90) and the outer laminations (30). The upper ends of the inner laminations (90) and outer laminations (30) are connected by a connecting element (100) made of a non-magnetic material, in order to stabilize the laminations and serve as a suspension mounting for the set of outer laminations (30). Application of electric current to a coil (95) causes the actuator (85) to move and carry the movable member (80) with it.

Abstract: The present invention provides an electric motor movement controlling method, where the electric motor is fed by a total voltage proportional to the network voltage. The method comprises steps of making a first measurement of level of the network voltage at a first moment of measurement and making a second measurement of level of the network voltage; at a second moment of measurement, calculating the value of the derivative of the values of voltage measured in function of the first and second moments of measurement, to obtain a value of a proportional network voltage, and altering the value of the total voltage fed to the motor, proportionally to the value of the proportional network. A system that will implement the steps of the method of the present invention, as well as a compressor comprising the system of the present invention are foreseen.

Abstract: A process for forming the stator of a linear electric motor, an annular stack of lamination elements, and a stator for an electric motor, said stator comprising an annular stack of laminations elements (5) within which is mounted a tubular coil (6), said process comprising the steps of: a-providing lamination elements (10), each being defined by two lamination portions (13, 14) to be affixed to each other to complete the respective lamination element (10); b-forming two mutually complementary annular assemblies (20, 30), with the lamination portions (13, 14) of each annular assembly (20, 30) being seated side by side in relation to each other; and c-seating in the interior of each of said annular assemblies (20, 30) a respective adjacent end portion of the tubular coil (6), affixing the two annular assemblies (20, 30) to each other, to complete the shape of the annular stack of lamination elements (5).

Abstract: A reciprocating compressor with a linear motor having an actuating means operatively coupling a reciprocating piston to the motor; and a resonant spring means mounted under constant compression to the actuating means by the mutual seating of a pair of supporting surface portions, at least one of the latter being operatively associated with one of the spring means and the actuating means, against a respective pair of convex surface portions, each of the latter being operatively associated with the other of said parts, the convex surface portions being symmetrical and opposite in relation to the axis of cylinder, the supporting surface portions and the convex surface portions being mutually seated and operatively associated with the respective parts of the spring means and the actuating means, in order to transmit, by the mutually seated surface portions, the opposite axial forces with such intensity as to minimize the moments on the piston.

Abstract: A linear compressor having a cylinder (2) and a piston (1) that is moved by an electric linear motor (4, 5, 6) is provided with one or more elastic elements (30, 50) made of steel wire having a central volute portion (30a, 50a). A leg (30b, 30c, 50b, 50c) extends from each end of the central volute portion (30a, 50a). In a first embodiment, one of the legs (30b) is fastened internally of the piston (1) and the other leg (30c) to a part of the cylinder (2). In a second embodiment, the central volute portion (50a) is mounted directly to the piston (1) and the two legs (50b, 50c) are fixedly connected to the cylinder (2). When the piston is moved by the action of the electric linear motor, the wire of the central volute portion of the elastic element distorts and stretches in the direction of travel of the piston. It is preferred that several elastic elements be mounted to the piston (1) having like portions of the central volute portion angularly spaced apart.

Abstract: An oil pump for a reciprocating hermetic compressor comprising a pump body, having a free end immersed in the oil, and an opposite end coupled to the compressor, so as to be driven by the latter in a reciprocating axial movement, said pump body defining at the free end thereof a valve seat, and further lodging a sealing means, which is displaced between a closing position, seated on said valve seat, and an opening position, spaced from said valve seat, said positions resulting from the displacements of approximation and spacing of the pump body in relation to the sealing means therewithin.

Abstract: A system for closing a suction muffler of a hermetic compressor, the suction muffler including: a hollow base; a cover to be coupled to the hollow base, the parts defined by the hollow base and the cover including respective mutually seatable peripheral flanges, which are shaped to define, jointly, an internal channel extended along at least part of the circumferential extension of the peripheral flanges and which is opened to the opposite external faces of the latter by means of throughbores axially aligned to each other in pairs, each pair of throughbores maintaining a circumferential distance in relation to an adjacent pair of throughbores, the throughbores of each pair and the internal channel being filled with a gasket of injected material, which projects outwardly from the throughbores so as to define an axial lock portion

Abstract: An oil pumping system for a reciprocating hermetic compressor having a shell, which defines in the interior thereof an oil sump; a motor compressor assembly; and an oil pump means. The oil pump means is coupled to the compressor by at least one dampening resilient means. The dampening resilient means is dimension to reduce the amplitude of displacement of the oil pump means to a value that is calculated so that the ratio between the natural frequency of resonance (Wn) of the oil pump means and an operation frequency (W) of the compressor results in a ratio between the displacements of the oil pump means and of the compressor with a value inferior to one.

Abstract: A mounting arrangement for a discharge tube of a hermetic compressor of the type which comprises: a hermetic shell (1) presenting a gas outlet (1a) and lodging a cylinder block (10) in which is affixed, through screws (8a), a cylinder head (8) defining, internally, a gas discharge chamber, and a discharge tube (9) presenting an inlet end (9a) in fluid communication with the gas discharge chamber through an orifice (8b) in the cylinder head (8), and an opposite end (9b) coupled to the gas outlet (1a) of the shell (1), said arrangement comprising an electrically insulating discharge connector (40) affixed to the of the screws (8a) and receiving and securing the inlet end (9a) of the discharge tube (9).

Abstract: A suction valve for a small hermetic compressor of the type presenting a compression cylinder (1), which has an end closed by a valve plate (2) having a discharge orifice (3) and a suction orifice (4), said valve comprising a flexible vane (10) which is shaped in a way to present: a fixation end portion (11) to be affixed to the valve plate (2); a bending median portion (12) provided with a median opening (13) aligned with a discharge orifice (3); and a sealing end portion (14) operatively associated with the suction orifice (4), the distance between an external edge (15) of the flexible vane (10) and an adjacent internal edge portion (16) of the contour of the median opening (13) diminishing, progressively, along a higher bending region (17) of the flexible vane (10) from a maximum value, close to the end fixation portion (11) to a minimum value, close to the boundary of the higher bending region (17).

Abstract: A cooling system comprising a compressor (20) and controlled by means of an electronic circuit (TE), the electronic circuit (TE) comprising a measuring circuit (ME) for measuring an electric power (Pn) supplied to the compressor (20) a microcontroller (10), a time variable (td), the measuring circuit (ME) effecting a measurement of the electric power (Pn) supplied the compressor (20), the microcontroller (10) comparing the measure. An electric power with reference-power values (Prl) and (Prd) previously stored in the microcontroller (10), the microcontroller altering the state of operation of the compressor (20) in function of the electric power (Pn) and of the time variable (td). A method of controlling a compressor (20), which comprises steps of storing a variable (Pn(te)) at a power value (Pn) measured at the moment when a period of time (te) counted from the moment of turning on the compressor (20) has been, and altering the value of the time variable (tD).