Abstract: There is provided an oil supply nozzle including a micro-needle, and a needle holder to which the micro-needle is inserted and fixed with an adhesive, wherein the needle holder includes a coupling hole formed to allow the needle holder to be inserted into an oil injection apparatus, and an injection hole connected to the coupling hole and having the micro-needle inserted thereinto, and the insertion hole and the coupling hole have a guide hole at a point of connection therebetween.

Abstract: Disclosed herein is a nozzle tip coupled to a nozzle header so that washing water is sprayed toward a substrate during a process of washing the substrate, the nozzle tip including: a flange having a hollow part formed therein; and a pipe body having a discharging slit formed in a front end portion thereof so as to be communicated with the hollow part of the flange.

Abstract: A rotary compressor including a case defining an external appearance of the compressor. A compressing device is arranged inside the case, and a lower cap is fixed to a lower end of the case. The rotary compressor further includes a weld zone to fix the compressing device and lower cap to each other.

Abstract: A rotor for a synchronous motor includes a main core which is formed with a shaft hole disposed in a center area thereof, a plurality of inductive conductor slots arranged along an outer area thereof, and a plurality of magnet slots each arranged between the shaft hole and the inductive conductor slots; an inductive conductor which is inserted into each inductive conductor slot; a first and a second permanent magnet units which each have at least one first permanent magnet and at least one second permanent magnet having different polarities, the first permanent magnet and the second permanent magnet being inserted into the magnet slots and being disposed opposite to each other with the shaft hole being interposed therebetween; and a magnetic flux loss prevention member which is disposed between the first permanent magnet unit and the second permanent magnet unit and prevents loss of magnetic flux, intervals between the inductive conductor slots become small as the inductive conductor slots go from centers of

Abstract: A rotary compressor including a cylinder to form a compression chamber, and including a vane slot including a vane guide part recessed outward from an inner surface of the compression chamber and an extended part having a width wider than the width of the vane guide part by a predetermined extension width in an outer end area of the vane guide part, a roller to eccentrically rotate in the compression chamber and to compress a medium, a vane reciprocatingly accommodated in the vane slot, and contacted to an outer surface of the roller to divide the compression chamber, and a filling member accommodated in a space of the extension width in the extended part.

Abstract: A variable capacity rotary compressor to securely fix a clutch pin to a rotation shaft includes first and second compression chambers having different inner volumes, a rotation shaft penetrating the first and second compression chambers, first and second eccentric bushes disposed on an outer circumference of the rotation shaft, a slot provided between the first and second eccentric bushes, a clutch pin protruding from the rotation shaft and disposed in the slot, and a fixing pin coupled with the side of the clutch pin in the rotation shaft to securely fix the clutch pin to the rotation shaft. A groove having a predetermined width can be formed at a rear side of the clutch pin and a rear side of the fixing pin can be inserted into the groove to couple with the clutch pin in the rotation shaft.

Abstract: A brushless DC motor prevents disconnection of a magnetic flux and to minimize leakage of the magnetic flux, thereby reducing torque ripple. A plurality of magnetic flux-disconnection preventing holes are arranged in an outer periphery of a rotor core between installing holes into which magnets are fitted. The plurality of magnetic flux-disconnection preventing holes are symmetrical at both sides about a first line connecting a center of the rotor core to a center between the adjacent installing holes, and an angle between the first line and a second line connecting the center of the rotor core to an outermost end of the plurality of magnetic flux-disconnection preventing holes is about 15˜20°. A length between an outer periphery of the rotor core and an outer periphery of the plurality of magnetic flux-disconnection preventing holes is smaller than a gap between the rotor core and the stator.

Abstract: A variable capacity rotary compressor having a slot defined between eccentric bushes, a latch pin fitted to a rotary shaft so as to be latched to the slot, and a restraint unit for restraining the eccentric bushes upon rotation of the rotary shaft. The restraint unit includes a restraint member mounted in the rotary shaft, a supporting shaft extending from the latch pin to be inserted into the hollow portion of the restraint member, and a return spring interposed between an outer circumference of the supporting shaft and the restraint member to move the restraint member inward toward the center of the rotary shaft when the rotary shaft is not rotated. The restraint unit is easy to manufacture and install and to ensure smooth operation thereof.

Abstract: A variable capacity rotary compressor including a hermetic casing in which a housing having first and second compression chambers is installed. A compressing unit is placed in the first and second compression chambers, and is 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 variable capacity rotary compressor also includes a first path, a second path, and a pressure control unit. The first path connects an outlet side of the rotary compressor to an inlet of the first compression chamber. The second path connects the outlet side of the rotary compressor to an inlet of the second compression chamber. The pressure controller functions to open either the first or second path, so that a pressure of the outlet side of the rotary compressor acts on the inlet of the first or second compression chamber where the idle operation is executed.

Abstract: A rotary compressor including a cylinder to form a compression chamber, and including a vane slot including a vane guide part recessed outward from an inner surface of the compression chamber and an extended part having a width wider than the width of the vane guide part by a predetermined extension width in an outer end area of the vane guide part, a roller to eccentrically rotate in the compression chamber and to compress a medium, a vane reciprocatingly accommodated in the vane slot, and contacted to an outer surface of the roller to divide the compression chamber, and a filling member accommodated in a space of the extension width in the extended part.

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 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. The compressor further includes a friction unit to prevent the upper and lower eccentric bushes from slipping. The friction unit is installed at a predetermined portion of the upper eccentric cam, and applies a frictional force to the upper eccentric bush to offset a slip-rotating force of the upper eccentric bush.

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.