Patents by Inventor Junchul OH
Junchul OH has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230304706Abstract: A turbo compressor and a refrigeration cycle device having a turbo compressor are provided. The turbo compressor includes a housing having a motor chamber; a drive motor having a stator and a rotor in the motor chamber of the housing; a first compression portion and a second compression portion, respectively, provided on opposite ends of a rotary shaft; a connecting passage that connects an exit of the first compression portion and an entrance of the second compression portion; an inlet passage that penetrates a first side of the housing to communicate with an inside of the motor chamber and guide a refrigeration fluid to the motor chamber; and an outlet passage that penetrates a second side of the housing to communicate with the inside of the motor chamber and guide the refrigeration fluid in the motor chamber out of the housing.Type: ApplicationFiled: July 1, 2021Publication date: September 28, 2023Inventors: Changgook MOON, Junchul OH, Hyojo BAE, Seheon CHOI, Kyungmin KIM, Jinhyeok MUN, Byeongchul LEE
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Publication number: 20230193917Abstract: A turbo compressor is disclosed. The turbo compressor may have an assembly-type rotational shaft where a permanent magnet is inserted into a connecting sleeve, at least one first locking projection formed on either an inner periphery of the connecting sleeve or an outer periphery of the permanent magnet facing the inner periphery of the connecting sleeve, and at least one first locking groove formed on the other. Thus, the permanent magnet constituting a rotor may be easily coupled into the rotational shaft, and the permanent may be effectively prevented from slipping. Moreover, a magnet embedded in the rotational shaft may be securely fixed so that it is held in a position where it is assembled, thus providing an advantage in concentrically aligning the magnet.Type: ApplicationFiled: August 23, 2022Publication date: June 22, 2023Inventors: Changgook MOON, Junchul OH, Byeongchul LEE, Taeyang KIM
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Patent number: 11460041Abstract: Provided is a turbo compressor. The turbo compressor includes a driving shaft, a first impeller, a second impeller, a first shroud, a second shroud, a first-stage outflow passage, and a second-stage outflow passage. Also, the turbo compressor includes a gap adjustment passage that is branched from at least one of the first-stage outflow passage or the second-stage outflow passage to extend to the first shroud.Type: GrantFiled: March 24, 2020Date of Patent: October 4, 2022Assignee: LG Electronics Inc.Inventors: Hyojo Bae, Junchul Oh, Seheon Choi
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Patent number: 11136981Abstract: A scroll compressor may include a rotational shaft, the rotational shaft including a first frame support having an inner circumferential surface, into which a boss of a first scroll is inserted, and an outer circumferential surface that forms an outer surface of the rotational shaft; and at least one guide hole that extends from the inner circumferential surface to the outer circumferential surface.Type: GrantFiled: September 6, 2017Date of Patent: October 5, 2021Assignee: LG ELECTRONICS INC.Inventors: Sungyong Ahn, Jinho Kim, Junghoon Park, Junchul Oh, Byeongchul Lee, Jaeha Lee, Seheon Choi
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Publication number: 20200400160Abstract: Provided is a turbo compressor. The turbo compressor includes a driving shaft, a first impeller, a second impeller, a first shroud, a second shroud, a first-stage outflow passage, and a second-stage outflow passage. Also, the turbo compressor includes a gap adjustment passage that is branched from at least one of the first-stage outflow passage or the second-stage outflow passage to extend to the first shroud.Type: ApplicationFiled: March 24, 2020Publication date: December 24, 2020Inventors: Hyojo BAE, Junchul OH, Seheon CHOI
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Patent number: 10605251Abstract: A turbo compressor is provided that may include an impeller housing having an impeller accommodation space, an inlet formed at a first side of the impeller accommodation space, and an outlet formed at a second side of the impeller accommodation space that communicates with the inlet; an impeller accommodated in the impeller accommodation space of the impeller housing, rotated together with a rotary shaft by being coupled to the rotary shaft, and configured to centrifugally-compress a fluid suctioned through the inlet of the impeller housing and discharge the compressed fluid outside of the impeller housing through the outlet; a back pressure space formed between a rear surface of the impeller and the impeller housing; a back pressure passage connected between the outlet of the impeller housing and the back pressure space; and a back pressure control valve installed between the back pressure passage and the back pressure space, and configured to selectively open and close a region therebetween.Type: GrantFiled: January 8, 2018Date of Patent: March 31, 2020Assignee: LG ELECTRONICS INC.Inventors: Junchul Oh, Byeongchul Lee, Seheon Choi
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Publication number: 20190390675Abstract: The present invention relates to a scroll compressor. A scroll compressor according to the present embodiment comprises a rotational shaft, wherein the rotational shaft comprises: a first frame support part having an inner circumferential surface portion, into which a boss part of a first scroll is inserted, and an outer circumferential surface portion for forming an outer surface thereof; and a guide hole penetrating from the inner circumferential surface portion toward the outer circumferential surface portion.Type: ApplicationFiled: September 6, 2017Publication date: December 26, 2019Inventors: Sungyong AHN, Jinho KIM, Junghoon PARK, Junchul OH, Byeongchul LEE, Jaeha LEE, Seheon CHOI
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Patent number: 10495088Abstract: A scroll compressor is provided that may include a casing having a sealed inner space; a drive motor provided in the inner space of the casing to generate a rotational force; a rotational shaft rotatably coupled to the drive motor; an orbiting scroll formed of an aluminum material, and coupled to the rotational shaft to perform an orbiting movement; a fixed scroll coupled to the orbiting scroll to form a compression space; and an Oldham ring coupled to the orbiting scroll, and formed of a sintered metal. With this structure, it may be possible to prevent the Oldham ring from being worn out due to contact with the orbiting scroll. Further, a weight loss portion or wear-resistant coating layer may be formed on a portion of the Oldham ring, thereby suppressing or preventing vibration noise of the scroll compressor from being increased due to a weight increase of the Oldham ring.Type: GrantFiled: August 25, 2016Date of Patent: December 3, 2019Assignee: LG ELECTRONICS INC.Inventors: Junchul Oh, Jaeha Lee, Seheon Choi, Byeongchul Lee
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Patent number: 10227983Abstract: A scroll compressor is provided that may include a casing; a drive motor; a fixed scroll that forms a compression space by being coupled to the orbiting scroll; and a discharge cover provided at an inner space of the casing, the discharge cover having a space that communicates with the compression space and separated from the inner space of the casing, and having one or more discharge hole on a side surface thereof, the one or more discharge hole providing communication between an inside and an outside of the space. With such a configuration, vibration noise of the scroll compressor may be more reduced in comparison with a case in which an oil separator is provided outside of the casing. Further, as an area of the one or more discharge hole and a volume of the space are optimized, efficiency of the scroll compressor may be enhanced.Type: GrantFiled: August 23, 2016Date of Patent: March 12, 2019Assignee: LG ELECTRONICS INC.Inventors: Jaeha Lee, Junchul Oh, Seheon Choi, Byeongchul Lee
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Publication number: 20180195520Abstract: A turbo compressor is provided that may include an impeller housing having an impeller accommodation space, an inlet formed at a first side of the impeller accommodation space, and an outlet formed at a second side of the impeller accommodation space that communicates with the inlet; an impeller accommodated in the impeller accommodation space of the impeller housing, rotated together with a rotary shaft by being coupled to the rotary shaft, and configured to centrifugally-compress a fluid suctioned through the inlet of the impeller housing and discharge the compressed fluid outside of the impeller housing through the outlet; a back pressure space formed between a rear surface of the impeller and the impeller housing; a back pressure passage connected between the outlet of the impeller housing and the back pressure space; and a back pressure control valve installed between the back pressure passage and the back pressure space, and configured to selectively open and close a region therebetween.Type: ApplicationFiled: January 8, 2018Publication date: July 12, 2018Inventors: Junchul OH, Byeongchul LEE, Seheon CHOI
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Patent number: 9897143Abstract: A bush bearing and a scroll compressor including a bush bearing are provided. A boss of an orbiting scroll may be inserted into and coupled to a boss coupling groove of a rotational shaft, and thus, an outer circumferential surface of a bush bearing may wholly contact an inner circumferential surface of the boss coupling groove, thereby decreasing wear of the bush bearing. Further, friction loss in the bush bearing may be reduced, and thus, compression efficiency and reliability may be enhanced, noise may be reduced, and material costs may be reduced. Furthermore, despite that the bush bearing is formed in a ring shape and press-fitted to the boss, as the bush bearing may be formed of a plastic material having an ether ketone bonding in consideration of a thermal expansion rate, an elongation, and a press-fit range, the bush bearing may be effectively prevented from being detached from the boss, thereby enhancing a reliability of a compressor.Type: GrantFiled: April 6, 2015Date of Patent: February 20, 2018Assignee: LG ELECTRONICS INC.Inventors: Junchul Oh, Sungyong Ahn, Eunji Hwang, Byeongchul Lee, Seheon Choi
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Publication number: 20170067466Abstract: A scroll compressor is provided that may include a casing having a sealed inner space; a drive motor provided in the inner space of the casing to generate a rotational force; a rotational shaft rotatably coupled to the drive motor; an orbiting scroll formed of an aluminum material, and coupled to the rotational shaft to perform an orbiting movement; a fixed scroll coupled to the orbiting scroll to form a compression space; and an Oldham ring coupled to the orbiting scroll, and formed of a sintered metal. With this structure, it may be possible to prevent the Oldham ring from being worn out due to contact with the orbiting scroll. Further, a weight loss portion or wear-resistant coating layer may be formed on a portion of the Oldham ring, thereby suppressing or preventing vibration noise of the scroll compressor from being increased due to a weight increase of the Oldham ring.Type: ApplicationFiled: August 25, 2016Publication date: March 9, 2017Inventors: Junchul OH, Jaeha Lee, Seheon Choi, Byeongchul Lee
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Publication number: 20170067467Abstract: A scroll compressor is provided that may include a casing; a drive motor; a fixed scroll that forms a compression space by being coupled to the orbiting scroll; and a discharge cover provided at an inner space of the casing, the discharge cover having a space that communicates with the compression space and separated from the inner space of the casing, and having one or more discharge hole on a side surface thereof, the one or more discharge hole providing communication between an inside and an outside of the space. With such a configuration, vibration noise of the scroll compressor may be more reduced in comparison with a case in which an oil separator is provided outside of the casing. Further, as an area of the one or more discharge hole and a volume of the space are optimized, efficiency of the scroll compressor may be enhanced.Type: ApplicationFiled: August 23, 2016Publication date: March 9, 2017Inventors: Jaeha LEE, Junchul OH, Seheon CHOI, Byeongchul LEE
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Patent number: 9541083Abstract: A scroll compressor is provided. The scroll compressor may include a communication hole formed in a fixed scroll for communicating a discharge space and a thrust bearing surface with each other. This may reduce frictional loss between the fixed scroll and an orbiting scroll. Further, if a high vacuum state is about to occur during operation of the compressor, refrigerant in the discharge space may be introduced into the compression chambers through the communication hole. This may prevent the occurrence of a high vacuum state to thereby prevent damage to the compressor. Additionally, when the compressor is stopped, a pressure equilibrium operation may be performed through the communication hole.Type: GrantFiled: November 9, 2012Date of Patent: January 10, 2017Assignee: LG ELECTRONICS INC.Inventors: Kitae Jang, Inho Won, Junchul Oh, Yanghee Cho, Byeongchul Lee
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Publication number: 20150285302Abstract: A bush bearing and a scroll compressor including a bush bearing are provided. A boss of an orbiting scroll may be inserted into and coupled to a boss coupling groove of a rotational shaft, and thus, an outer circumferential surface of a bush bearing may wholly contact an inner circumferential surface of the boss coupling groove, thereby decreasing wear of the bush bearing. Further, friction loss in the bush bearing may be reduced, and thus, compression efficiency and reliability may be enhanced, noise may be reduced, and material costs may be reduced. Furthermore, despite that the bush bearing is formed in a ring shape and press-fitted to the boss, as the bush bearing may be formed of a plastic material having an ether ketone bonding in consideration of a thermal expansion rate, an elongation, and a press-fit range, the bush bearing may be effectively prevented from being detached from the boss, thereby enhancing a reliability of a compressor.Type: ApplicationFiled: April 6, 2015Publication date: October 8, 2015Inventors: Junchul OH, Sungyong AHN, Eunju HWANG, Byeongchul LEE, Secheon CHOI
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Publication number: 20130121864Abstract: A scroll compressor is provided. The scroll compressor may include a back pressure chamber formed between a wrap portion and a base portion of an orbiting scroll. A center of the back pressure chamber may be eccentric from a geometric center of the orbiting scroll along a line where a gas repulsive force is applied. Such a configuration may reduce/eliminate unstable behavior of the orbiting scroll, and frictional loss or abrasion between the orbiting scroll and various peripheral components may be reduced. This may enhance reliability and performance of the scroll compressor.Type: ApplicationFiled: November 9, 2012Publication date: May 16, 2013Inventors: Kitae JANG, Inho WON, Junchul OH, Yanghee CHO, Byeongchul LEE
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Publication number: 20130121866Abstract: A scroll compressor is provided. The scroll compressor may include guide holes formed at one of a wrap portion or a base portion, and guide pins inserted into the guide holes formed at the other of the wrap portion or the base portion to couple the wrap portion and the base portion to each other. Such guide pins and guide holes may be easily processed to reduce fabrication costs and reduce or eliminate unstable behavior of the orbiting scroll. As the guide pins and the guide holes have a circular cross section, abrasion of the guide pins or the guide holes may be prevented.Type: ApplicationFiled: November 9, 2012Publication date: May 16, 2013Inventors: Kitae JANG, Inho WON, Junchul OH, Yanghee CHO, Byeongchul LEE
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Publication number: 20130121865Abstract: A scroll compressor is provided. The scroll compressor may include a communication hole formed in a fixed scroll for communicating a discharge space and a thrust bearing surface with each other. This may reduce frictional loss between the fixed scroll and an orbiting scroll. Further, if a high vacuum state is about to occur during operation of the compressor, refrigerant in the discharge space may be introduced into the compression chambers through the communication hole. This may prevent the occurrence of a high vacuum state to thereby prevent damage to the compressor. Additionally, when the compressor is stopped, a pressure equilibrium operation may be performed through the communication hole.Type: ApplicationFiled: November 9, 2012Publication date: May 16, 2013Inventors: Kitae Jang, Inho Won, Junchul Oh, Yanghee Cho, Byeongchul Lee