Empresa Brasileira De Compressores S.a. - Embraco

Whirlpool S.a.

Embraco-industria De Compressores E Solucoes Em Refrigeracao, Ltda.

Rinaldo Puff

Dietmar Erich Bernhard Lilie

Egidio Berwanger

Ingwald Vollrath

Adilson Luiz Manke

Manfred Krueger

Diego Sacomori

Marcelo Knies

Alexandre Rafael Schroeder

Dietmar Erich Bernard Lilie

Dietmar E B Lilie

Clodovir Gallo

Henrique Brüggmann MÜHLE

The compressor comprises: a crankcase () carrying a cylinder () and a bearing hub () having a first and a second end portions () and defining a radial bearing (), in which is housed a crankshaft (); and a connecting rod () coupled to a piston () housed in the cylinder () and having a larger eye () mounted in an eccentric end portion () of the crankshaft (). Each of said end portions () is defined by a bushing extension () affixed in the interior of the bearing hub () and having an end portion () projecting outwards from the bearing hub (), in order to be elastically and radially deformed when pressed by a confronting portion of the crankshaft (), which presents coaxiality deviation in relation to the axis (X) of the radial bearing ().

Bearing arrangements in a refrigeration reciprocating compressor

The present device is applied to a linear driving unit which comprises: a linear electric motor (M) formed by a motor housing (C) which is electrically excited and affixed to a fixed structure (), and by a magnetic armature (A) which is displaced in a reciprocating axial movement; and a helical resonant spring () having an end coupled to the fixed structure () and an opposite end coupled to the magnetic armature (A). The deformation control device () is mounted to contact a surface extension of the resonant spring (), which is elastically and radially deformed, and to generate friction with said surface extension and/or an elastic deformation in the deformation control device (), absorbing energy in a value sufficient to at least minimize said radial elastic deformation of the resonant spring ().

Deformation control device for a resonant spring in a linear driving unit

The mounting arrangement is applied to a compressor which comprises: a piston having a cylindrical tubular body; and an actuating means connected to the piston to drive the latter in a reciprocating movement. The suction muffler comprises two tubular inserts, longitudinally disposed in the interior of the piston and having spaced apart open adjacent ends, and closed opposite ends respectively affixed to the top wall of the piston and to the actuating means, and defining, in the interior of the piston, a muffling chamber (C) and an annular passage medianly opened to the muffling chamber (C) and communicating an open rear end of the piston with a suction valve provided in a top wall of said piston.

Mounting arrangement for a suction muffler in a linear motor compressor

The compressor of the invention comprises: a block with a cylinder; a movable assembly formed by a piston reciprocating in the cylinder and coupled to an actuating means by a rod; and a resonant spring having a first and a second diametrical end portion which are attached to the movable assembly by a first fixation means (MF) and, to the block, by a second fixation means (MF) which is adjustably attached to the block and to said second end portion so as to affix the latter to the block in a position defined along the displacement of the resonant spring in three directions orthogonal to one another and defined by the direction of the axis of the resonant spring, by the diametrical direction of the second end portion and by the diametrical direction orthogonal to said two first directions, and also along the angular displacement of said second end portion around said three directions orthogonal to each other.

Mounting arrangement for a resonant spring in a linear motor compressor

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.

Piston lubricating system for a reciprocating compressor with a linear motor

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.

Reciprocating compressor with a linear motor

A linear compressor having a cylinder () and a piston () that is moved by an electric linear motor () is provided with one or more elastic elements () made of steel wire having a central volute portion (). A leg () extends from each end of the central volute portion (). In a first embodiment, one of the legs () is fastened internally of the piston () and the other leg () to a part of the cylinder (). In a second embodiment, the central volute portion () is mounted directly to the piston () and the two legs () are fixedly connected to the cylinder (). 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 () having like portions of the central volute portion angularly spaced apart. Such arrangement provides a more equal distribution of the forces of the piston acting against the central volute portions of the elastic elements.

Linear compressor

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.

Oil pumping system for a reciprocating hermetic compressor

A linear compressor vertically mounted inside a hermetic shell () and including: a reference assembly with elements including a block defining a cylinder (); a resonant assembly with elements including an actuator () that carries a piston () within the cylinder (). There are provided: a first resilient element () mounted between the resonant assembly () and one end of the shell (); a second resilient element () mounted between the reference assembly () and the other end of the shell (); and a third resilient element () mounted between the reference assembly () and the resonant assembly (), with the first and the second resilient elements () applying opposite forces to the shell () upon reciprocation of the piston ().

A vibration dampening system for a reciprocating compressor with a linear motor of the type comprising a motor-compressor assembly having a reference assembly ( ) formed by a motor and a cylinder ( ) and mounted inside a shell ( ) and a resonant assembly ( ) formed by a resonant spring ( ) and piston ( ) reciprocating inside the cylinder ( ), the system comprising at least one first balancing means ( ) connecting the reference assembly ( ) to the shell ( ), and at least one second balancing means ( ) connecting the resonant assembly ( ) to the shell ( ), both balancing means ( ) actuating according to the displacement direction of the piston ( ), said second balancing means ( ) presenting a coefficient of elasticity proportional to the coefficient of elasticity of the first balancing means ( ) by a factor defined by the ratio of the masses of the resonant assembly ( ) and of the reference assembly ( ), respectively.

Vibration dampening system for a reciprocating compressor with a linear motor

A process for forming an annular stack of metallic laminations for the stator of a linear motor and an annular stack of metallic laminations. Said process comprises the steps of: a&mdash;providing a rectilinear alignment for a plurality of metallic laminations ( ) having their internal edges ( ) mutually seated and defining a flat surface ( ); b&mdash;affixing to each other the internal edges ( ) of the rectilinear alignment of the metallic laminations ( ), in order to allow only the relative and limited angular displacement of each said metallic lamination ( ) around its respective internal edge ( ); and c&mdash;deforming the alignment of the metallic laminations ( ) affixed to each other to an annular configuration, with the internal edges ( ) of the metallic laminations ( ) defining an internal cylindrical surface ( ) of said annular stack.

Process for forming an annular stack of metallic laminations for the stator of a linear motor and an annular stack of metallic laminations

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.

Position sensor and compressor

A reciprocating compressor includes a linear motor having a piston reciprocating inside a cylinder. A cylinder head is provided with suction and discharge orifices. A valve means is mounted inside the cylinder and has an operative position, seated against the discharge orifice. The operative position is defined when the top of the piston is within a certain distance from the cylinder head. The distance is defined, so that, at the end of the compression stroke of the piston, a determined pressure is reached inside the cylinder, and the pressure results in a force on the piston. The force is opposite to a force which is impelling the piston and which is sufficient to interrupt its compression stroke before impacting the cylinder head.

Valve arrangement for limiting piston stroke collisions in a reciprocating compressor with a linear motor

A resonant assembly for a reciprocating compressor driven by a linear motor. The compressor includes a piston ( ), driven by an actuator ( ), which reciprocates inside a cylinder ( ) provided with an end closed by a head. The assembly comprises a resonant element, defining by a single piece, a rod portion ( ) and a spring portion ( ). The spring portion is affixed to a non-resonant structure ( ) of the compressor at a plurality of points which are symmetric in relation to the longitudinal axis of the cylinder and lie on a plane orthogonal to the longitudinal axis of the cylinder.

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Rinaldo Puff