DOOWON TECHNICAL COLLEGE Patent applications |
Patent application number | Title | Published |
20140248163 | CONTROL VALVE FOR A VARIABLE CAPACITY COMPRESSOR AND METHOD FOR MANUFACTURING SAME - Provided is a control valve for a variable capacity compressor, the control valve including: a valve body including a crank-chamber port, a discharge port, a suction port, a control channel formed inside the control valve such that the crank-chamber port and the discharge port communicate with each other, and a first bleeding channel formed such that the crank-channel port and the suction port communicate with each other; an operating unit provided in the valve body and including a second bleeding channel communicated from a center area to a side surface of the operating unit; and a driving unit provided in the valve body and connected to the operating unit to enable the operating unit to reciprocally move according to a current applied by an external source. | 09-04-2014 |
20130343920 | VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR - Provided is a variable displacement swash plate type compressor including: a lug plate fixed to a driving shaft; and a swash plate combined to the lug plate and whose tilt angle is varied according to rotatory motion, wherein the lug plate includes a protruding portion protruding towards the swash plate, and a rotatory power projection transmitting power for rotating the swash plate is formed at a leading end of the protruding portion through the swash plate. Accordingly, a varying operation between a maximum tilt angle and a minimum tilt angle of the swash plate and a rotatory power transmitting operation for rotating the swash plate are performed at different locations, thereby simultaneously improving the varying operation and the rotatory power transmitting operation of the swash plate. | 12-26-2013 |
20120100012 | METHOD FOR CONTROLLING ELECTRIC COMPRESSOR - Disclosed is a method of controlling an electric compressor. The method includes: (I) starting the electric compressor by applying an electric power to an air conditioner; (II) determining, by an inverter, whether the electric compressor is started normally; and normally driving the electric compressor when the electric compressor starts normally in the step (II) and determining again whether the electric compressor starts normally by restarting the electric compressor. Therefore, abnormal operation such as malfunction, short, and overheating of the electric compressor is detected in the early starting stage to determine restarting and failure of starting the electric compressor so that reliability of the electric compressor may be enhanced. | 04-26-2012 |
20110220825 | DISPLACEMENT CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR - The invention provides a displacement control valve for a variable displacement compressor comprising: a valve housing having a discharge chamber connecting space and a crank chamber connecting space; an electronic solenoid; and a valve body configured to reciprocate within the valve housing the electronic solenoid. The displacement control valve is opened and closed when the valve body moves from the discharge chamber connecting space toward the crank chamber connecting space, making it possible to enlarge a cross-sectional area of the valve body and improving productivity. | 09-15-2011 |
20110196573 | METHOD OF CONTROLLING INVERTER-INTEGRATED ELECTRIC COMPRESSOR FOR VEHICULAR AIR CONDITIONING SYSTEM - Disclosed is a method of controlling an inverter-integrated electric compressor for a vehicular air conditioning system, which prevents an over-current from being generated due to a load of an inverter for driving the electric compressor and reduces an RPM even without stopping the vehicular air conditioning system, preventing damage to the air conditioning system due to an over-current. The method of controlling an inverter-integrated electric compressor for a vehicular air conditioning system includes the steps of: (1) calculating a target RPM of a motor for driving the inverter-integrated electric compressor in a vehicular air conditioning system; (2) checking whether a current applied to the motor driven according to the target RPM exceeds a threshold value preset in the inverter; and (3) decreasing, if the current applied to the motor exceeds the threshold vale, the target RPM in the inverter to perform a feedback control of reducing the current, and rotating, if the current applied to the motor does not exceed the threshold value, the motor according to the target RPM. | 08-11-2011 |
20110194964 | SCROLL COMPRESSOR WITH IMPROVED BACK PRESSURE CONTROL FUNCTION - A scroll compressor that includes: a housing, a drive unit configured to generate a rotating force; and a scroll compression unit having a fixed scroll having a spiral scroll wrap for compressing a suctioned fluid and fixed irrespective of a rotation of a drive shaft of the drive unit and a swivel scroll swiveled according to rotation of the drive shaft and having a spiral scroll wrap, comprises: a main frame disposed within the housing to support a rear surface of the swivel scroll and having a back pressure chamber in an interior thereof; a thrust plate disposed between the swivel scroll and the main frame; and a sealing member inserted between the swivel scroll and the main frame. The sealing member includes a first sealing member inserted between the swivel scroll and the thrust plate, and a second sealing member inserted between the thrust plate and the main frame. | 08-11-2011 |
20110146215 | OIL SEPARATOR - An oil separator comprises: a hollow outer body having an inlet and a drain hole; and an inner tube spaced apart from an inner peripheral surface of the outer body and having a discharge hole at a center thereof. The inner peripheral surface of the outer tube guides oil toward the drain hole opposite to the discharge hole. The present invention provides an oil separator that maximizes an oil separating effect through enhancement of a centrifugal force. The present invention also provides an oil separator that maximizes an oil separating performance by preventing gas and oil from being remixed by guiding the flow direction of the oil separated by a centrifugal force using a spiral portion and a taper. | 06-23-2011 |
20110139273 | EXHAUST CHECK VALVE OF SWASH PLATE COMPRESSOR - An exhaust check valve installed in an exhaust opening of a swash plate compressor comprises: a valve body having a refrigerant inlet and at least one refrigerant outlet; a movable body installed in the valve body and configured to move such that the refrigerant inlet and the refrigerant outlet communicate with each other; and a spring configured to push the movable body with a certain pressure. At least one refrigerant vent hole for venting a leak gas generated during an operation below a preset pressure difference to the outside of the valve body is formed in the valve body. | 06-16-2011 |
20110107906 | RECIPROCATING COMPRESSOR WITH ROTARY VALVE - According to the present invention, a reciprocating compressor with a rotary valve comprises a cylinder block with plural cylinder bore, a drive shaft which is supported and permitted to rotate in relation to the cylinder block, a piston which is housed in the cylinder bore and allowed to reciprocate therein, a power transmitting unit which connects the piston and drive shaft, a rear housing wherein an intake chamber and exhaust chamber are formed, and a rotary valve which rotates with the drive shaft and is installed in the inner surface of a coupling hole formed in the cylinder block and permitted to slide and rotate therein. In the inner circumference of the cylinder block, connection holes are respectively connected to the cylinder bore. A bypass unit is included between the coupling hole and rotary valve and bypasses the refrigerant remaining in the connection hole of one cylinder bore during the compressive stroke of the piston, then discharges it through the connection hole of another cylinder bore. | 05-12-2011 |
20110008197 | INVERTER TYPE SCROLL COMPRESSOR - The present invention relates to an inverter type scroll compressor and comprises a housing, a fixed scroll which is set up inside the housing, an orbiting scroll which orbits around the fixed scroll, a driving unit which turns the orbiting scroll, an intake port and a discharge port which are in the housing, and an inverter which faces the front surface of the fixed scroll. An intake hole penetrating to the compression chamber and a discharge hole are respectively formed in the fixed scroll and the orbiting scroll. Accordingly, the present invention is configured so that the coolant is discharged through the discharge hole after the coolant passes through the inverter and the fixed scroll and then flows into the compression chamber. | 01-13-2011 |
20100329915 | SCROLL COMPRESSOR COMPRISING OIL SEPARATING DRIVING SHAFT - The present invention relates to a scroll compressor, with an oil-separating drive shaft, that comprises a housing a fixed scroll which is installed inside the housing, a orbiting scroll which orbits around the fixed scroll, and a drive shaft which drives the orbiting scroll. In the orbiting scroll, a discharge hole is formed. A discharge path is formed along the longitudinal direction of the drive shaft so that discharged coolant from the discharge hole flows therethrough. At least, a part of the discharge path is inclined forward from the rotary axis to the exterior. A lubrication hole is formed in the drive shaft that penetrates from the discharge path to the outer surface of the drive shaft. | 12-30-2010 |
20100272583 | VALVE PLATE OF RECIPROCATING COMPRESSOR - Provided is a valve plate of a reciprocating compressor, the reciprocating compressor including a front housing and a rear housing, a cylinder block having a plurality of cylinder bores, a drive shaft rotatably supported by the front housing and the cylinder block, a swash plate connected to the drive shaft to be rotated therewith to vary its inclination angle, pistons reciprocally accommodated in the cylinder bores depending on slide movement of the swash plate, a valve plate installed between one end of the cylinder block and the rear housing and having a suction port and a discharge port, and a suction chamber and a discharge chamber that are formed in the rear housing with the valve plate interposed therebetween, characterized in that an oil suction passage, an oil discharge passage and a coolant supply passage are formed in a surface of the valve plate opposite to the pistons, the oil discharge passage is constituted by at least two branch passages directed from a center part toward an outer periphery of the valve plate, and the branch passages are connected by a connecting passage at the center part. Therefore, it is possible to appropriately distribute the pressure of oil to prevent oil leakage to the coolant supply passage, etc., even when the pressure of the oil discharged through the oil discharge passage is high. Further, the branch passages and the connecting passage have a specific shape to enable smooth flow of the oil. | 10-28-2010 |
20100141066 | INVERTER CONNECTION TERMINAL ASSEMBLY FOR ELECTRIC COMPRESSOR - The present invention provides an inverter connection terminal assembly for an electric compressor. The inverter connection terminal assembly includes a connection terminal, in which upper and lower terminal projections project from the upper and lower surfaces of a plate, respectively, an inverter connection cable connected to the upper terminal projection of the connection terminal, a motor connection cable connected to the lower terminal projection of the connection terminal, an upper connector for connecting the upper terminal projection and the inverter connection cable, and a lower connector for connecting the lower terminal projection and the motor connection cable, wherein the lower terminal projection of the connection terminal includes a thread formed on the surface thereof such that the motor connection cable is fixed to the lower terminal projection by fastening a nut while a washer and a ring connector are sequentially inserted into the lower terminal projection. | 06-10-2010 |
20100135828 | VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR - Provided is a variable displacement swash plate type compressor including a cylinder block having a plurality of cylinder bores, a front housing disposed in the front of the cylinder block to form a swash plate chamber, a drive shaft rotatably supported by the cylinder block, a lug plate disposed in the swash plate chamber of the front housing and fixed to the drive shaft, a rear housing disposed in the rear of the cylinder block to form a suction chamber and a discharge chamber in communication with the cylinder bores through suction/discharge valves, a swash plate rotated by the lug plate to vary its inclination angle, a spring supported between the lug plate and the swash plate, and pistons slidably engaged with the swash plate and reciprocally accommodated in the cylinder bores, characterized in that a power transmission groove is formed at a rear part of the lug plate opposite to the swash plate, a hooking projection inserted into the power transmission groove is formed at a front part of the swash plate opposite to the lug plate, and slide blocks are installed at a pin projecting from both sides of the hooking projection to be interposed between an inner side surface of the power transmission groove and an outer side surface of the hooking projection. | 06-03-2010 |
20100092311 | DISPLACEMENT CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR - The present invention provides a displacement control valve for a variable displacement compressor, the displacement control valve including a valve housing, in which a discharge chamber passage and a crank chamber passage are provided, and a valve body for opening and closing the valve, characterized in that a motor rotates the valve body to open and close the valve. Therefore, the present invention can reduce the overall length of the displacement control valve to reduce the size of the compressor, thereby achieving a compact structure of the compressor. | 04-15-2010 |
20090317276 | SCROLL COMPRESSOR HAVING ROTATION PREVENTION MECHANISM - Provided is a scroll compressor having a rotation prevention mechanism including: a housing for accommodating components; a drive unit for generating a rotational force; a suction part for sucking fluid from the exterior; a scroll compression part including a stationary scroll constituted of a spiral scroll wrap for compressing the fluid sucked from the suction part and fixed regardless of rotation of a drive shaft of the drive unit, and an orbiting scroll orbited depending on rotation of the drive shaft and having a spiral scroll wrap; and a discharge part for discharging the high pressure fluid compressed by the scroll compression part, characterized in that a guide ring is installed between the stationary scroll and the suction-side housing, a plurality of fitting pins are installed to project forward from an outer periphery of the orbiting scroll, and a plurality of fitting grooves, in which the fitting pins are accommodated, are formed at an inner periphery of the guide ring. | 12-24-2009 |
20080223208 | Assembly structure of drive shaft and swash plate in swash plate type compressor - Provided is an assembly structure of a drive shaft and a swash plate in a swash plate type compressor including a housing, a cylinder block having a plurality of cylinder bores, a drive shaft rotatably supported by the cylinder block or the housing, a swash plate installed at the drive shaft to vary its tilt angle with respect to the drive shaft, and pistons reciprocally accommodated in the cylinder bores, characterized in that the assembly structure includes: a swash plate tilt support pin fixedly installed at the drive shaft to cross the drive shaft; a hinge coupling groove formed in the swash plate to be rotatably coupled to a tip of the swash plate tilt support pin in a tilted manner, and a swash plate support part formed in the swash plate to support the drive shaft. | 09-18-2008 |