Abstract: 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.

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: The present invention relates to a cooling system of a refrigerator, particularly of a refrigerator including a refrigeration compartment and a freezer comprising a compressor attached to at least one condenser by a segment of a refrigerant tube, wherein a first refrigerant line leaves from the condenser and returns to the compressor, and a second refrigerant line leaves from the condenser and returns to the compressor. In the preferred embodiment of the present invention, the compressor has at least two suction inlets, wherein the first refrigerant line is connected to the first inlet and the second refrigerant line is connected to the second inlet, and both inlets have each a suction valve.

Abstract: 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 (MF1) and, to the block, by a second fixation means (MF2) 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.

Abstract: A compressor comprising: a cylinder crankcase (10) defining a compression chamber (13) housing a reciprocating piston (22); an actuating means (40) coupled to the piston (22); and a resonant spring means (50) having a first and a second diametrical end segment (50a, 50b) respectively affixed to the actuating means (40) by a first securing means (MF1) and to the cylinder crankcase (10) by a second securing means (MF2), the latter comprising: a base vise jaw (60, 60?) affixed to the second diametrical end segment (50b); a top vise jaw (70, 70?) mounted between opposite portions of the cylinder crankcase (10) and seated, pressed and locked against the base vise jaw (60, 60?), in a condition in which the axes of the end diametrical segments (50a, 50b) intercept the axis of the compression chamber (13) and in which the piston (22) has a predetermined axial position in the compression chamber (13).

Abstract: The compressor comprises a movable assembly carrying a suction muffler and formed by: a piston (10) having a skirt (11) with an open rear end (11a) and a closed front end (11b) which carries a suction valve (50); and an actuating means (30). The suction muffler comprises: a first and a second tubular insert (61, 62) defining a first and a second chamber (C1, C2) and having confronting open ends (61a, 62a) spaced from each other, and closed opposite ends (61b, 62b) respectively affixed to a top wall (12) of the piston (10) and to the actuating means (30); a third tubular insert (63) internally lining the skirt (11); and an annular passage (15), between the third and the second tubular inserts (63, 62), open to the first and second chambers (C1, C2), and communicating the open rear end (11a) of the skirt (11) with the suction valve (50).

Abstract: The compressor comprises: a cylinder crankcase (1) defining a cylinder (2) closed by a valve plate (3) provided with at least one discharge orifice (3a); a cylinder cap (10) seated against the valve plate (3) and in the interior of which is defined a discharge chamber (11). The present system comprises a hollow body (20) defining at least one plenum (21) mounted internal to the cylinder cap (10), maintaining a gap (30) with the latter. The hollow body (20) is seated against the valve plate (3), preventing the direct contact thereof with the inner volume of the hollow body (20), the latter being provided with an inlet nozzle (22) communicating the plenum (21) with the discharge orifice (3a) of the valve plate (3), and with an outlet nozzle (23) communicating the plenum (21) with a gas outlet (13) of the cylinder cap (10).

Abstract: The compressor comprises: a cylinder crankcase (1) defining a cylinder (2) which is closed by a valve plate (3) provided with at least one discharge orifice (3a) associated with a discharge valve (4) and defining, with the cylinder (2), a compression chamber (C); a cylinder cap (10) seated against the valve plate (3) and inside which is defined a discharge chamber (11). The system comprises an accelerating means (AM) mounted in the interior of the discharge chamber (11) and secured to at least one of the parts of cylinder cap (10) and valve plate (3), in order to receive the entire flow of refrigerant gas released through the discharge orifice (3a), accelerating said gas flow and producing an instantaneous reduction in the pressure gradient between the upstream and downstream sides of the discharge valve (4), in the moment the latter opens.

Abstract: A flexible sealing glove (100) applicable under radial tension to aerostatic linear compressors (200), capable of sealing the bearing channels (1, 2), which are located on the outer face (5) of the cylinder (14). The flexible sealing glove (100) is made of substantially polymeric material and its main functions are to increase the efficiency and the yield of the compressor (200).

Abstract: The compressor comprises: a shell carrying a gas outlet tube and housing a cylinder cap having a gas outlet; and a plastic discharge tube having an inlet end and an outlet end respectively coupled to the gas outlet and to the gas outlet tube, at least one of said inlet and outlet ends being connected to a discharge part, defined at the gas outlet or at the gas outlet tube, by a connecting element having: a fixation portion, affixed inside the discharge part; an engaging portion fitted inside one end of the discharge tube and carrying a superficial indexing means acting against the discharge tube; and gripping means disposed between the indexing means and the fixation portion; and a retaining ring mounted around the discharge tube for compressing the latter, in order to spike, therein, the gripping means.

Abstract: The linear compressor comprises a shell (10) which affixes a cylinder (20) defining a compression chamber (21) housing a piston (30); a linear electric motor (40) having a fixed part (41) and a reciprocating movable part (42); an actuating means (50) driven by the movable part (42); an elastic means (60a) coupling the actuating means (50) to the piston (30), so that they are reciprocated in phase opposition. A supporting elastic means (70) connects the actuating means (50) to the shell (10) and presents a radial stiffness for supporting the lateral loads actuating on said movable part (42) and actuating means (50), and for minimizing the axial misalignments between the movable part (42) and the fixed part (41) of the linear electric motor (40), the supporting elastic means (70) presenting a minimum axial stiffness for allowing the displacement of both the piston (30) and the actuating means (50).

Abstract: The linear compressor comprises a shell (10) which affixes a cylinder (20) defining a compression chamber (21) housing a piston (30); a linear electric motor (40) having a fixed part (41) affixed to the shell (10) and a reciprocating movable part (42); an actuating means (50) driven by the movable part (42); an elastic means (60a) coupling the actuating means (50) to the piston (30), so that they are reciprocated in phase opposition. A supporting elastic means (70) connects the actuating means (50) to the shell (10) and presents a radial rigidity for supporting the lateral loads actuating on said movable part (42) and actuating means (50), and for minimizing the axial misalignments between the movable part (42) and the fixed part (41) of the linear electric motor (40), the supporting elastic means (70) presenting a minimum axial rigidity for allowing the displacement of both the piston (30) and the actuating means (50).

Abstract: A linear motor (10), a linear compressor (100), a method of controlling a linear compressor (100), a cooling system (20) and a system of controlling a linear compressor (100) to operate a linear compressor (100) in resonance in it's the greatest possible efficiency throughout its operation are described.

Abstract: A piston and cylinder combination driven by linear motor with cylinder position recognition system, including a support structure forming an air gap; a motor winding generating a variable magnetic flow along part of the air gap; a cylinder having a head at one end; a piston connected to a magnet, the magnet driven by the magnetic flow of the motor winding to move inside a displacement path including at least partially the air gap; the displacement of the magnet making the piston reciprocatingly move inside the cylinder; and an inductive sensor disposed at a point of the displacement path of the magnet, such that when the piston reaches a position of closest approach to the cylinder head, the inductive sensor detects a variation in the magnetic field resulting from the corresponding position of the magnet, and generates a voltage signal arising from this magnetic field variation.

Abstract: The present invention relates to a cooling system of a refrigerator, particularly of a refrigerator including a refrigeration compartment and a freezer comprising a compressor attached to at least one condenser by a segment of a refrigerant tube, wherein a first refrigerant line leaves from the condenser and returns to the compressor, and a second refrigerant line leaves from the condenser and returns to the compressor. In the preferred embodiment of the present invention, the compressor has at least two suction inlets, wherein the first refrigerant line is connected to the first inlet and the second refrigerant line is connected to the second inlet, and both inlets have each a suction valve.

Abstract: A linear compressor (100) applicable to a cooling system (20) includes a piston (1) driven by a linear motor (10), the piston (1) having displacement range controlled by means of a controlled voltage (VM), the controlled voltage (VM) having a voltage frequency (?P) applied to the linear motor (10) and adjusted by a processing unit (22), the range of piston (1) displacement being dynamically controlled in function of a variable demand of the cooling system (20), the linear compressor (100) having a resonance frequency, the processing unit (22) adjusting the range of piston (1) displacement, so that the linear compressor (100) will be dynamically kept on resonance throughout the variations in demand of the cooling system (20).

Abstract: Semi-commanded valve system applied to an alternative-type compressor, wherein said compressor comprises at least a cylinder (1), at least a piston (2), at least a compression chamber (3), and at least one valve (71;81) acting in their respective orifice (7;8). Said at least one valve (71;81) is prestressed in a first operation state and is able to act as a check valve. Furthermore, said at least one valve (71;81) comprises at least a ferrous portion and can be selectively actuated by a magnetic field generating element (72;82). Method of modulating the capacity of a compressor provided with such a semi-commanded valve system.

Abstract: A flow restrictor (1) for use in bearing formation between a piston (2) and a cylinder (3) of a gas compressor (4). The gas compressor (4) includes a protective pad (5) that externally surrounds the cylinder (3), and an inner cavity (6) is disposed between the protective pad (5) and the cylinder (3), fluidly fed by a discharge flow from a compression movement exerted by the piston (2). The gas compressor (4) further includes a bearing formation gap (7) that separates an outer wall of the piston (2) and an inner wall of the cylinder (3). A flow restrictor (1) is provided with a housing (12) that fluidly associates the inner cavity (6) to the bearing formation gap (7). The flow restrictor (1) includes a limiting tube (8) associated with the housing (12), provided with at least one restraining portion provided with a cross section sized to limit the gas flow from the inner cavity (6) to the bearing formation gap (7).

Abstract: Restrictors (16,17) for aerostatic bearings capable of ensuring a constant flow, regardless of their size and dimensional tolerance, such that the gas flow is adjusted by deforming their internal section. A process for the production of restrictors (16,17) for aerostatic bearings with respect to ensuring the gas flow values desired is also provided.

Abstract: A piston (1) and cylinder (2) assembly that can reduce efficiency losses due to the gas in a linear compressor with aerostatic bearings. The space between the piston (1) and cylinder (2) in the piston-cylinder assembly was designed to decrease radial clearance (12) in the upper portion of the piston (1) when the piston approaches the headpiece (3), i.e., when the density of the gas not being used in the refrigeration process is the highest. The piston (1) and cylinder (2) assembly must exhibit such a geometric ratio that radial clearance (12) changes in inverse proportion to the density of the gas in the radial clearance (12).