Empresa Brasileira De Compressores S.a. - Embraco

Empresa Brasileira De Compressores

Empresa Brasileira De Compressores S.a.

Empresa Brasiliera De Compressores

Expressa Brasileira De Compressores S.a.-embraco

Empressa Brasielira De Compressores S/a-embraco

Caio M Da Costa

Juscelino F Dos Santos

Hermetic compressor for refrigeration systems

The invention refers to a hermetic compressor with rotary rolling piston, of the type of high internal pressure inside the shell (1) and small displacement volume, and with its cylindrical chamber, internal to the cylinder block (4), being internally divided by the rolling piston (50,500) and by a sliding vane (9), into suction and discharge chambers with internal pressure being considerably lower than the internal pressure of the shell during most of the rolling piston (50,500) operating cycles. An axial gap for the passage of lubricant oil is provided between the annular faces of the rolling piston (50,500) and the axial end walls (10a, 20a) of the cylindrical chamber. The rolling piston (50,500) presents an external diameter/internal diameter relation of about 1.63 up to 2.22, in order to increase the radial path of the lubricant oil through said axial gaps.

Rolling piston compressor with defined dimension ratios for the rolling

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.

Migration blocking valve in a refrigerating system

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. This arrangement causes the compression chamber pressure to be transmitted to the vane face turned to the suction chamber, while lubrication of this same side of the vane with the oil held within the groove and coming from the compression chamber is promoted.

Rotary rolling piston type compressor

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. A piston movable within the valve casing has surfaces communicating with and responsive to the gas pressure at said first and second driving inlets and is responsive to a pressure differential between the gases at said first and second driving inlets when the compressor starts and the pressure of the second outlet of the muffler is greater than that in the housing interior for moving the piston to provide fluid communication between the valve casing inlet and outlet openings so that the refrigerant gas can leave the compressor, the valve piston being moved to a position to close the valve when the compressor stops and the pressure in the discharge muffler drops.

Discharge flow blocking valve for a hermetic rotary compressor

An outlet valve for rotary rolling piston compressor, the piston being assembled within a cylinder block having an attached end wall provided with gas discharge passage whose outlet end defines an annular valve seat placed in an oblong recess area circumscribing the valve seat within which a valve blade is located, the area between the bottom wall with the circumscribing side wall of the oblong recess and/or with the peripheral wall of the valve seat being curved to reduce the turbulence of gas leaving the outlet of the discharge passage.

Outlet valve for a rolling piston rotary compressor

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.

Direct suction system for a hermetic rotary compressor with insulating

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.

Hermetic compressor with crankshaft having eccentric piston portion with

A lubricating system for a rotary horizontal crankshaft hermetic compressor, including a hermetic shell housing a cylinder block, main bearing and sub bearing which supports one end portion of a crankshaft and an electric motor which supports the other end portion. The shell defines as a lubricating oil sump and receives gas from the cylinder through a discharge orifice. The cylinder block divides the shell into a rear section, housing the electric motor, which section has the outlet end of the gas discharge orifice, and a front section which is in communication with the end of the compressor discharge tube and with the rear shell section through a lower oil passage in the sump. There is a gas duct and a level regulating passage with the gas duct being dimensioned to create a pressure differential between the two sections which is sufficient to elevate the lubricating oil in the front section up to the crankshaft end for lubricating it.

Lubricating system for rotary horizontal crankshaft hermetic compressor

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.

Discharge system for rotary rolling piston compressor

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.

High frequency noise suppressor for hermetic rotary compressors

A discharge system for rolling piston rotary compressor, including a hermetic housing a cylinder block having a rolling piston assembled on an eccentric shaft supported by a pair of bearings assembled at opposed sides of the cylinder block. The first of said bearings is innerly shaped as a discharge muffler chamber open to the end face of said bearing which is turned to the cylinder block and closed by a valve plate directed seated against the end adjacent face of the cylinder block, said valve plate having an axial eccentrical discharge port communicating the interior of the cylinder block with a recess bottom having a blade discharge valve seat turned to the interior of the portion in the discharge muffler chamber. Such arrangement allows the valve plate to simultaneously work as a discharge muffler chamber cover and as an end wall of the cylinder block, and such arrangement can further be sized to have a minimum thickness which will only be enough to incoporate the blade valve housing recess and a small axial extension of the discharge port.

Discharge system for rolling piston rotary compressor

A horizontal crankshaft rotary compressor in a housing having a discharge muffler formed with a plurality of interconnected communicating volumes with a discharge tube extending through the housing in which an oil draining tube has one end communicating with the lowest muffler volume where oil accumulates and the other end with the interior of the shell at a point above the oil in the bottom of the housing.

Horizontal crankshaft rotary compressor with oil drain tube from muffler

A reed valve for a hermetic compressor having a case housing a cylinder and a piston movable therein with compression and suction chambers being defined in conjunction with the piston and an end plate provided with a refrigerating fluid passage hole defining with its outlet end a seat on which the flexible blade of a valve is seatable. The passage hole outlet end is in a spaced plane in relation to a parallel plane on the end plate to which the blade basic portion is attached with the blade, when not elastically deformed, lying in a sloped plane in relation to the plane containing the passage hole outlet.

Reed valve for hermetic compressor

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.

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Joinville, Brazil

Caio M Da Costa