Abstract: Provided is a compressor including a valve unit including: at least two guide pins passing through a discharge valve; and through holes allowing the guide pins to pass therethrough to control oblique motion of the discharge valve with respect to a horizontal direction during up and down movement of the discharge valve. When the discharge valve obliquely moves up and down with respect to the horizontal direction, the guide pin comes into contact with at least two points of an inner circumferential surface of the through hole so that the oblique movement of the discharge valve is restricted, thereby improving the durability of the discharge valve and reducing noise during operation of the compression.

Abstract: Provided is a compressor including a valve unit including: at least two guide pins passing through a discharge valve; and through holes allowing the guide pins to pass therethrough to control oblique motion of the discharge valve with respect to a horizontal direction during up and down movement of the discharge valve. When the discharge valve obliquely moves up and down with respect to the horizontal direction, the guide pin comes into contact with at least two points of an inner circumferential surface of the through hole so that the oblique movement of the discharge valve is restricted, thereby improving the durability of the discharge valve and reducing noise during operation of the compression.

Abstract: Disclosed herein is an a compressor including a main body, a fixed scroll fixed on the inside of the main body, an orbiting scroll arranged to orbit relative to the fixed scroll, a compressing chamber formed by the fixed scroll and the orbiting scroll, an oil supply hole arranged to supply oil to a contact portion formed by the fixed scroll and the orbiting scroll, and an oil groove formed on an inner side of the contact portion to be closed to an outer side of the contact portion. The oil groove is extended into the form of an arc by being rotated by about 270 degrees or more along the circumference of the fixed scroll to cover the compressing chamber from the outside of the compressing chamber to supply oil all across the area of the contact portion easier which leads to more reliable operation of the compressor.

Abstract: Disclosed herein is an a compressor including a main body, a fixed scroll fixed on the inside of the main body, an orbiting scroll arranged to orbit relative to the fixed scroll, a compressing chamber formed by the fixed scroll and the orbiting scroll, an oil supply hole arranged to supply oil to a contact portion formed by the fixed scroll and the orbiting scroll, and an oil groove formed on an inner side of the contact portion to be closed to an outer side of the contact portion. The oil groove is extended into the form of an arc by being rotated by about 270 degrees or more along the circumference of the fixed scroll to cover the compressing chamber from the outside of the compressing chamber to supply oil all across the area of the contact portion easier which leads to more reliable operation of the compressor.

Abstract: A scroll compressor includes a back pressure chamber formed at the rear of a swivel scroll to support the swivel scroll, the swivel scroll swiveling while engaging with a stationary scroll to compress a refrigerant, and a back pressure adjustment device to automatically apply first middle pressure or second middle pressure lower than the first middle pressure to the back pressure chamber based on a compression ratio.

Abstract: A scroll compressor includes a back pressure chamber formed at the rear of a swivel scroll to support the swivel scroll, the swivel scroll swiveling while engaging with a stationary scroll to compress a refrigerant, and a back pressure adjustment device to automatically apply first middle pressure or second middle pressure lower than the first middle pressure to the back pressure chamber based on a compression ratio.

Abstract: A variable capacity rotary compressor includes a hermetic casing, a housing installed in the hermetic casing to define therein first and second compression chambers having different capacities, and a compressing unit placed in the first and second compression chambers and operated to execute a compression operation in either the first or second compression chamber according to a rotating direction of a rotating shaft which drives the compressing unit. The compressor further includes a suction path controller having a hollow body and a valve unit, and a pressure controller. The hollow body has an inlet connected to a refrigerant inlet pipe, and first and second outlets formed on the hollow body at opposite ends of the hollow body to be spaced apart from the inlet of the hollow body. The valve unit is installed in the hollow body to axially reciprocate in the hollow body to change a refrigerant suction path by a pressure difference between the first and second outlets of the hollow body.

Abstract: A variable capacity rotary compressor, including upper and lower compression chambers having different capacities, a rotating shaft passing through the upper and lower compression chambers, upper and lower eccentric cams provided on the rotating shaft, and upper and lower eccentric bushes fitted over the upper and lower eccentric cams, respectively. A slot is provided at a predetermined position between the upper and lower eccentric bushes. A locking pin, moves along the slot, to change a position of the upper or lower eccentric bush to a maximum eccentric position, and a clutch engages with the slot at a position opposite to the locking pin to thereby preventing the upper and lower eccentric bushes from slipping over the upper and lower eccentric cams, respectively.

Abstract: A variable capacity rotary compressor including a housing, the housing including two compression chambers, the two compression chambers having different capacities; a rotating shaft rotatably provided in the two compression chambers; two eccentric units respectively provided in the compression chambers in such a way as to be fitted over the rotating shaft, the two eccentric units being operated so that one of the two eccentric units is positioned eccentrically from the rotating shaft to perform a compression operation while the other eccentric unit is positioned concentrically with the rotating shaft to perform an idle operation, according to a rotating direction of the rotating shaft; roller pistons fitted over each of the two eccentric units; vanes installed in each of the two compression chambers so as to reciprocate in a radial direction while being in contact with an outer surface of the roller piston; and a path control unit to control a refrigerant suction path so that a refrigeran is provided to an in

Abstract: A variable capacity rotary compressor includes a housing having a compressing chamber, a roller to rotate in the compressing chamber while coming into contact with an inner peripheral surface of the compressing chamber, a vane to move forward and rearward along a guiding groove in accordance with rotation of the roller, the guiding groove being formed in the housing in a radial direction of the compressing chamber, a vane control device to regulate restriction and release of the vane as to whether or not the vane comes into continuous contact with an outer peripheral surface of the roller, and a controller to output a control signal to the vane control device for the variation of a compression capacity, so as to regulate a proportion of restriction and release of the vane, and a capacity variation method using the variable capacity rotary compressor.

Abstract: A variable capacity rotary compressor capable of equalizing an interior pressure (i.e., discharge pressure) of a hermetically sealed container with an interior pressure of a compression chamber where an idling operation is performed, resulting in a reduction of rotation resistance of a rotary shaft. The variable capacity rotary compressor includes housings disposed in the hermetically sealed container and having an interior space partitioned by intermediate plates into first and second compression chambers with different capacities, a rotary shaft rotatably disposed in the two compression chambers, eccentric units to selectively induce a compression operation in one of the two compression chambers depending on a rotational direction of the rotary shaft, and a pressure adjustment unit to apply the discharge pressure of the hermetically sealed container to one of the compression chambers where the idling operation is performed.

Abstract: A variable capacity rotary compressor including upper and lower compression chambers having different capacities, and a rotating shaft. Upper and lower eccentric cams are provided on the rotating shaft to be eccentric from the rotating shaft in a same direction. Upper and lower eccentric bushes are fitted over the upper and lower eccentric cams, respectively, to be eccentric from the rotating shaft in opposite directions, with a slot provided at a predetermined position between the upper and lower eccentric bushes. A locking pin functions to change a position of the upper or lower eccentric bush to a maximum eccentric position. A restraining unit is set along an edge of the slot to prevent the upper or lower eccentric bush from slipping. The restraining unit includes first and second elastic pieces which are respectively provided at positions adjacent to first and second ends of the slot.

Abstract: A variable capacity rotary compressor allowing oil to be smoothly supplied to compressing elements, regardless of a rotating direction of a rotating shaft. The variable capacity rotary compressor includes a rotating shaft which is rotated in a forward direction or a reverse direction to vary a compression capacity of the compressor. A shaft bearing supports the rotating shaft. An oil guide groove is spirally formed on at least one of the shaft bearing and the rotating shaft to supply oil. An oil storing chamber is defined at an upper portion of the shaft bearing to communicate with the oil guide groove, and stores a predetermined amount of oil therein.

Abstract: A rotary compressor including upper and lower compression chambers having different interior capacities thereof, a rotating shaft having a locking hole, upper and lower eccentric cams provided on the rotating shaft to be eccentric from the rotating shaft, upper and lower eccentric bushes fitted over the upper and lower eccentric cams, respectively, and a locking pin inserted into the locking hole to change a position of the upper or lower eccentric bush to a maximum eccentric position. A slot is provided at a position between the upper and lower eccentric bushes. Further, a surface-treated part is provided around the locking hole to increase an hardness thereof, thus preventing the surrounding of the locking hole from being worn out when the locking pin collides with a first end or a second end of the slot.

Abstract: A variable capacity rotary compressor includes a hermetic casing, a housing installed in the hermetic casing to define therein first and second compression chambers having different capacities, and a compressing unit placed in the first and second compression chambers and operated to execute a compression operation in either the first or second compression chamber according to a rotating direction of a rotating shaft which drives the compressing unit. The compressor further includes a suction path controller, a high-pressure pipe, and a high-pressure path controller. The suction path controller controls a refrigerant suction path so that a refrigerant is delivered into an inlet port of the first or second compression chamber where the compression operation is executed. The high-pressure pipe couples an outlet side of the compressor to the suction path controller.

Abstract: A variable capacity rotary compressor including upper and lower compression chambers in which compressing operations are carried out. A slot is provided at a predetermined position between upper and lower eccentric bushes. A locking pin makes either of the upper and lower eccentric bushes be disposed at a maximum eccentric position. Since the locking pin has a diameter which is larger than a locking hole in a shaft by about 0.02 mm to 0.06 mm, the locking pin is fitted into the locking hole in a press-fit method. Further, the locking hole has a threaded part and a non-threaded part, and the locking pin has a threaded part to correspond to the threaded part of the locking hole and a non-threaded part to correspond to the non-threaded part of the locking hole.

Abstract: A variable capacity rotary compressor including upper and lower compression chambers having different interior capacities, and a rotating shaft. Upper and lower eccentric cams are provided on the rotating shaft to be eccentric from the rotating shaft in a same direction. Upper and lower eccentric bushes are fitted over the upper and lower eccentric cams, respectively, in such a way that a maximum eccentric part of the upper eccentric bush is opposite to that of the lower eccentric bush, with a slot provided between the upper and lower eccentric bushes. A locking pin functions to change a position of the upper or lower eccentric bush to a maximum eccentric position. Further, upper and lower brake units are respectively provided between the upper eccentric cam and the upper eccentric bush, and between the lower eccentric cam and the lower eccentric bush.

Abstract: A variable capacity rotary compressor to prevent an eccentric bush and a locking pin from being deformed or worn out due to a variance in a pressure of a compression chamber as a rotating shaft rotates. The compressor includes upper and lower compression chambers having different interior capacities thereof, and a rotating shaft. Upper and lower eccentric cams are provided on the rotating shaft to be eccentric from the rotating shaft in a common direction. Upper and lower eccentric bushes are fitted over the upper and lower eccentric cams, respectively, with a slot provided at a position between the upper and lower eccentric bushes. The locking pin operates to change a position of the upper or lower eccentric bush to a maximum eccentric position. Further, surfaces of parts around first and second ends of the slot are heat-treated, thus increasing a hardness thereof.

Abstract: An air conditioner has a variable capacity rotary compressor, which allows the compressor to be smoothly re-started, thus increasing start reliability of the compressor. The air conditioner includes a compressor rotated in opposite directions. A drive unit rotates the compressor in a forward or reverse direction. A start determining unit determines whether the compressor has started to rotate in a forward direction or not. A control unit operates the drive unit so as to rotate the compressor in a direction opposite to the forward direction, and then re-start the compressor in the forward direction, when the compressor has failed to start. The air conditioner and a method of controlling the air conditioner allow the compressor to be smoothly and rapidly re-started even when the compressor has failed to re-start, thus increasing start reliability, and shortening a time required to re-start the compressor.

Abstract: A variable rotary compressor with a capacity being variable as desired includes a drive device generating a rotating force, a rotating shaft connected to the drive device at a first end thereof and rotated by the drive device, and a cylinder through which a second end of the rotating shaft passes. Two or more compressing chambers are provided in the cylinder such that the two or more compressing chambers are sequentially arranged along an axial direction of the rotating shaft. Rollers are eccentrically installed on the rotating shaft such that the rollers are arranged, respectively, in the two or more compressing chambers. A one-way clutch is installed on the rotating shaft to selectively transmit the rotating force to at least one of the rollers in accordance with a rotating direction of the rotating shaft. During operation of the rotary compressor, only one of the rollers is selectively rotated.