Lg Electronics Inc.

Byeonghun Yu

Yunhi Lee

Byeongchul Lee

Honghee Park

Sanghun Seong

Wooyoung Kim

Jinyong Jang

Sooho Jang

Wheesung Oh

Jaesang Lee

Kamgyu Lee

Gunyoung Park

Gun Young Park

Changeon Lee

A scroll compressor is provided that may include an orbiting scroll, a non-orbiting scroll, a back pressure chamber assembly, a back pressure passage, and a flow resistance portion. The back pressure passage may provide communication between a compression chamber and a back pressure chamber, and the flow resistance portion may be disposed at a middle portion of the back pressure passage to reduce an amount of refrigerant flowing through the back pressure passage. This may reduce a substantial cross-sectional area of the back pressure passage while improving machining of the back pressure passage, thereby decreasing an amount of refrigerant flowing between the compression chamber and the back pressure chamber. Accordingly, pressure pulsation in the back pressure chamber may be lowered and sealing stability between the orbiting scroll and the non-orbiting scroll may be enhanced, thereby improving compression performance.

Scroll compressor

A scroll compressor may include a back pressure passage that provides communication between a compression chamber and a back pressure chamber to guide refrigerant compressed in the compression chamber partially to the back pressure chamber. The back pressure passage may communicate with the compression chamber through a front end surface of a non-orbiting wrap axially facing an orbiting end plate. Accordingly, when an orbiting scroll tilts, the non-orbiting wrap may be spaced apart from the orbiting end plate to open a scroll back pressure hole, such that the compression chamber and the back pressure chamber communicate with each other to quickly vary pressure in the back pressure chamber to be adaptive to the pressure of the compression chamber. This may result in appropriately adjusting back pressure in the back pressure chamber according to an operating mode and/or operating conditions, thereby increasing a sealing power and suppressing or preventing excessive contact.

A scroll compressor is disclosed. The scroll compressor may include an oil supply hole penetrating from an oil passage to an outer circumferential surface of a rotating shaft, and an oil supply groove communicating with the oil supply hole and formed along the outer circumferential surface of the rotating shaft. The oil supply groove may be provided in plurality axially spaced apart by a preset distance. This can prevent the oil supply groove from invading an oil film section and increase centrifugal force against oil in the oil supply groove, thereby suppressing friction loss and wear between a main frame and the rotating shaft.

Scroll compressor having oil supply groove in communication with oil supply hole defined from oil passage to rotating shaft surface

A scroll compressor includes a discharge guide disposed in a high-pressure part to guide refrigerant discharged from a compression part to a refrigerant discharge pipe, and the discharge guide may extend by a preset height from an inner circumferential surface of a casing constituting the high-pressure part toward one side surface of a high and low pressure separation plate. This can guide discharge refrigerant discharged to the high-pressure part to quickly flow to the refrigerant discharge pipe before being spread in an entire space of the high-pressure part, thereby preventing the high and low pressure separation plate from being overheated by discharge refrigerant of high temperature. This can result in preventing suction refrigerant of a low-pressure part from being heated by heat of discharge refrigerant transferred through the high and low pressure separation plate, thereby reducing a specific volume of the suction refrigerant and improving compressor efficiency.

Scroll compressor including discharge guide to quicken discharge refrigerant flow movement

A scroll compressor is disclosed. The scroll compressor may include a suction guide between a refrigerant suction pipe and a high/low pressure separation plate, and the suction guide may be fastened to a non-orbiting scroll or inserted into a suction guide protrusion that extends from the non-orbiting scroll. Accordingly, suction refrigerant may be partially suctioned into a compression chamber by the suction guide in advance before moving to the high/low pressure separation plate, so as to be prevented from coming into contact with the high/low pressure separation plate, while the suction refrigerant may also partially flow toward a drive motor without being suctioned directly into the compression chamber, so as to cool the drive motor, whereby efficiency of the compressor may be improved and an operation range of the compressor may be expanded.

Scroll compressor including suction guide

Disclosed herein is a rotary engine a supply flow passage provided in the housing to allow the lubricating oil to move therethrough, a sealing part arranged to contact the rotor to selectively close the supply flow passage, and an elastic part configured to press the sealing part toward the combustion chamber.

Rotary engine

The present invention provides a rotary engine comprising: a housing provided with three lobe accommodation parts; a rotor which is provided with two lobes continuously accommodated in the lobe accommodation parts, has an intake storage part communicating with an intake port provided on the front surface-side, and has an exhaust storage part communicating with an exhaust port provided on the rear surface-side; an intake-side housing cover provided with an intake hole communicating with the intake storage part; an exhaust-side housing cover provided with an exhaust hole communicating with the exhaust storage part; and a crankshaft, wherein the flow of an exhaust gas into a stroke chamber during an intake stroke is reduced by preventing the exhaust storage part, at a portion of a section in which the exhaust port is open, from communicating with the exhaust hole during the intake stroke.

The present disclosure relates to a rotary engine having a crankshaft with an improved structure, the rotary engine including a housing, a rotor, housing covers, and a crankshaft installed to penetrate through the rotor so as to receive rotational force from the rotor, wherein the crankshaft includes a first member extending in one direction and having an insertion groove recessed in one side surface thereof, a second member extending to penetrate through a center portion of the housing and provided with a protruding portion on one end thereof to be fixedly inserted into the insertion groove, and a coupling member interposed at a position where the insertion groove and the protruding portion overlap each other such that the first member and the second member are closely coupled to each other.

A rotary engine having a crankshaft, a housing provided with lobe accommodating portions arranged to surround the crankshaft, and combustion chambers communicating with the lobe accommodating portions, a rotor rotatable eccentrically with respect to the crankshaft and provided with lobes continuously accommodated in the lobe accommodating portions, a housing cover provided with a bearing portion through which the crankshaft is inserted so as to be rotatably supported, and a lubricating unit to supply oil to the bearing portion, wherein the lubricating unit includes an oil pan to accommodate oil therein, an oil pump to pump up oil filled in the oil pan, and an oil supply passage having both ends located in the oil pump and the bearing portion, respectively, is provided. This structure may allow direct and effective lubrication of the bearing portion, and can employ a journal bearing.

Rotary engine with oil pump

A rotary engine including a housing having therein N lobe accommodating portions (N is a natural number equal to or greater than 3), and combustion chambers communicating with the lobe accommodating portions, respectively, a rotor having N&#x2212;1 lobes eccentrically rotating centering on a center of the lobe accommodating portions, and consecutively accommodated in the respective lobe accommodating portions during the eccentric rotation, and combustion controllers provided at both sides of each combustion chamber, and configured to limit a combustion range of mixed gas.

Growing community of inventors

Seoul, South Korea

Byeonghun Yu