Patents Assigned to DOOWON Technical College
  • Patent number: 7955141
    Abstract: 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.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: June 7, 2011
    Assignees: Doowon Technical College, Doowon Electronic Co., Ltd.
    Inventors: Se Hoon Jang, Young Chang Han, In Hwe Koo, Geon Ho Lee
  • Publication number: 20110107906
    Abstract: 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.
    Type: Application
    Filed: June 9, 2009
    Publication date: May 12, 2011
    Applicants: DOOWON TECHNICAL COLLEGE, DOOWON ELECTRONIC CO., LTD.
    Inventors: Geon Ho Lee, Dong hui Lee, Seok Bong Lee, Ki Beom Kim, Joung Hyun Park
  • Publication number: 20110008197
    Abstract: 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.
    Type: Application
    Filed: February 27, 2009
    Publication date: January 13, 2011
    Applicants: DOOWON TECHNICAL COLLEGE, DOOWON ELECTRONIC CO., LTD.
    Inventors: Geonho Lee, Inhwe Koo
  • Publication number: 20100329915
    Abstract: 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.
    Type: Application
    Filed: February 27, 2009
    Publication date: December 30, 2010
    Applicants: Doowon Technical College, Doowon Electronic Co., LTD.
    Inventors: Geonho Lee, Inhwe Koo
  • Publication number: 20100272583
    Abstract: 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
    Type: Application
    Filed: December 24, 2008
    Publication date: October 28, 2010
    Applicants: DOOWON TECHNICAL COLLEGE, DOOWON ELECTRONIC CO.
    Inventors: Geonho Lee, Haksoo Kim, Kibeom Kim, Ikseo Park, Kijung An, Stefan Kroess
  • Patent number: 7802512
    Abstract: 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. Therefore, it is possible to simplify the structure of the swash plate type compressor and reduce its own weight by omitting a lug plate or a hinge mechanism in an assembly structure of the drive shaft and the swash plate.
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: September 28, 2010
    Assignees: DOOWON Technical College, DOOWON Electronic Co., Ltd.
    Inventors: Geonho Lee, Haksoo Kim, Kibeom Kim, Ikseo Park, Kijung An
  • Publication number: 20100141066
    Abstract: 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.
    Type: Application
    Filed: December 8, 2009
    Publication date: June 10, 2010
    Applicants: DOOWON TECHNICAL COLLEGE, DOOWON ELECTRONIC CO., LTD
    Inventors: Se Hoon Jang, Young Chang Han, In Hwe Koo, Geon Ho Lee
  • Publication number: 20100135828
    Abstract: 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
    Type: Application
    Filed: April 26, 2007
    Publication date: June 3, 2010
    Applicant: Doowon Technical College
    Inventors: Geonho Lee, Tae-jin Lee, Dong-hui Lee, Ho-Cheol Ki
  • Publication number: 20100092311
    Abstract: 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.
    Type: Application
    Filed: October 8, 2009
    Publication date: April 15, 2010
    Applicants: DOOWON TECHNICAL COLLEGE, DOOWON ELECTRONIC CO., LTD
    Inventors: Hak-soo Kim, Young-il Chang, Yong-ju Lee, Ki-jung An, Geon-ho Lee
  • Publication number: 20090317276
    Abstract: 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.
    Type: Application
    Filed: December 14, 2006
    Publication date: December 24, 2009
    Applicants: DOOWON TECHNICAL COLLEGE, DOOWON ELECTRONIC CO., LTD.
    Inventors: Geon-Ho Lee, Dong-Lim Nam, Young-Chang Han, Bo-Young Nam, Jung-Kyung Lee
  • Publication number: 20080223208
    Abstract: 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. Therefore, it is possible to simplify the structure of the swash plate type compressor and reduce its own weight by omitting a lug plate or a hinge mechanism in an assembly structure of the drive shaft and the swash plate.
    Type: Application
    Filed: February 6, 2008
    Publication date: September 18, 2008
    Applicants: DOOWON TECHNICAL COLLEGE, DOOWON ELECTRONIC CO., LTD
    Inventors: Geonho Lee, Haksoo Kim, Kibeom Kim, Ikseo Park, Kijung An