Lg Electronics Inc.

Changeol Jo

Jeonghun Kim

Suchul Kim

Nara Han

Juhwan Yun

Donghyun Sohn

Jihoon Park

Sung Yong Ahn

Junghwan Jang

Ikhyeon Kwon

Kidae Kwon

A scroll compressor is disclosed. The scroll compressor has back pressure holes which are formed in a non-orbiting scroll and a back pressure chamber assembly, and provide communication between a compression chamber and a back pressure chamber. In addition, a back pressure valve is provided inside of the back pressure hole to change a passage area of the back pressure hole by moving along a longitudinal direction of the back pressure hole due to a pressure difference between the compression chamber and the back pressure chamber. Due to the back pressure valve, pressure pulsation in the back pressure chamber may be improved.

Scroll compressor

A scroll compressor is provided that may include a block insertion groove to accommodate a discharge port and at least one bypass hole disposed in a rear surface of a non-orbiting end plate of a non-orbiting scroll, and a retainer block including at least one bypass valve to open or close the bypass hole inserted into the block insertion groove. The bypass hole may include a first bypass hole and a second bypass hole. The bypass valve may include a first bypass valve to open or close the first bypass hole and a second bypass valve to open or close the second bypass hole, and may be disposed between the block insertion groove and the retainer block facing the block insertion groove. Accordingly, the first and second bypass valves are not fastened to the non-orbiting end plate, which may allow the non-orbiting end plate to be made thin.

Retainer block bypass hole valve assembly arranged in non-orbiting scroll of a compressor

A scroll compressor is disclosed. The scroll compressor may include a back pressure hole formed through a non-orbiting scroll and a back pressure chamber assembly such that a compression chamber and a back pressure chamber communicate with each other. A back pressure valve may be disposed inside of the back pressure hole and move along a longitudinal direction of the back pressure hole by a pressure difference between the compression chamber and the back pressure chamber, to vary a flow path area of the back pressure hole. The back pressure valve may include a valve body that extends in an axial direction and a plurality of holes formed through the valve body in the axial direction. With the configuration, pressure pulsation in the back pressure chamber may be suppressed or prevented.

A scroll compressor is provided, the scroll compressor having a block insertion groove recessed by a predetermined depth into a rear surface of a non-orbiting scroll to accommodate a discharge port and a plurality of bypass holes, and a retainer block having a bypass valve that opens and closes the plurality of bypass holes fixedly inserted into the block insertion groove. The bypass valve may be fixed to a first axial side surface of the retainer block facing the block insertion groove. Through this, the bypass valve that suppresses or prevents overcompression of a compression chamber is not fastened to a non-orbiting end plate, which may allow the non-orbiting end plate to be reduced in thickness. This may shorten lengths of the plurality of bypass holes and the discharge port by the reduced thickness of the non-orbiting end plate, thereby decreasing a dead volume in the plurality of bypass holes and the discharge port.

Scroll compressor having at least one valve fixedly inserted into block insertion groove of non-orbiting scroll

A scroll compressor is provided. In the scroll compressor, a valve accommodating groove that accommodates a discharge port and bypass holes is recessed by a predetermined depth into a rear surface of a non-orbiting scroll, and a valve guide is disposed between the rear surface of the non-orbiting scroll and a rear surface of the back pressure chamber assembly facing the rear surface of the non-orbiting scroll. Bypass valve guide holes into which bypass valves that open and close the bypass holes are slidably inserted are formed in the valve guide. Accordingly, the bypass valves that suppress or prevent overcompression in compression chambers are not fastened to a non-orbiting end plate, which may allow the non-orbiting end plate to be reduced in thickness. As the non-orbiting end plate is reduced in thickness, lengths of the bypass holes may be reduced, thereby decreasing dead volumes in the bypass holes.

A scroll compressor may include a block insertion groove recessed by a predetermined depth into a rear surface of a non-orbiting scroll to accommodate a discharge port and at least one bypass hole, and a retainer block having at least one bypass valve to open and close the at least one bypass hole may be fixedly inserted into the block insertion groove. Accordingly, the at least one bypass valve that suppresses or prevents overcompression in a compression chamber is not fastened to a non-orbiting end plate, which may allow the non-orbiting end plate to be formed thin. As the non-orbiting end plate is reduced in thickness, a length of the at least one bypass hole may be reduced, thereby decreasing a dead volume in the at least one bypass hole.

A scroll compressor may include an oil supply passage formed in a main frame. A first end of the oil supply passage may be open toward an orbiting space of the main frame and a second end may be open toward an Oldham ring. With this configuration, even if refrigerant suctioned through a refrigerant suction pipe sweeps away oil, which lubricates a sliding surface between a key and a key groove adjacent to the refrigerant suction pipe while passing through between the key and the key groove, oil may be quickly and smoothly supplied to the sliding surface. This may prevent wear between the key and the key groove so as to enhance efficiency of the compressor.

Scroll compressor having an oil supply passage including first end open at the orbiting space and second end open at an Oldham ring

A scroll compressor may include a casing having a low pressure portion and a high pressure portion, a refrigerant suction pipe that communicates with the low pressure portion and a refrigerant discharge pipe that communicates with the high pressure portion, a drive motor installed inside of the low pressure portion, an orbiting scroll coupled to the drive motor to perform an orbiting motion, a non-orbiting scroll engaged with the orbiting scroll to form a compression chamber, and a refrigerant guide provided on the non-orbiting scroll to guide a refrigerant suctioned into the low pressure portion to be suctioned into the compression chamber, whereby an increase in specific volume of refrigerant suctioned into the compression chamber may be suppressed, and thus, an amount of refrigerant suctioned into the compression chamber may increase, thereby improving efficiency of the compressor.

A compressor may include a casing, and a compression device installed inside of the casing and that compresses the refrigerant while rotating by receiving a rotational force of an electric motor through a rotational shaft. A high/low pressure separation plate may be installed at an upper portion of the compression device, and an insulation plate may be provided to block the high/low pressure separation plate and the suction tube from each other by being located therebetween. The insulation plate may reduce heat transfer between a refrigerant discharge space having a high temperature located at the upper portion of the high/low pressure separation plate and a refrigerant suction space having a relatively low temperature located at a lower portion of the high/low pressure separation plate.

Compressor having insulation plate

A scroll compressor is provided in which one of a fixed scroll or an orbiting scroll is provided with at least one guide groove, and the other is provided with a self-rotation prevention member inserted into the at least one guide groove to revolve in the at least one guide groove and configured to prevent self-rotation of the orbiting scroll.

Scroll compressor containing scroll self-rotation prevention arrangement

A scroll compressor is provided in which a center of a back pressure chamber is eccentrically disposed relative to a center of a fixed scroll. For example, the center of the back pressure chamber may be moved towards a center of an orbiting scroll at a time of discharge, thereby preventing displacement of the fixed scroll and ensuring stability in orbital movement of the orbiting scroll.

A scroll compressor may include a frame, an orbiting scroll provided with at least one first key groove, a non-orbiting scroll provided with at least one second key groove and coupled to the orbiting scroll to form a compression chamber, and an anti-rotation ring disposed between the frame and the orbiting scroll. The anti-rotation ring may include a ring, at least one first key that axially extends from a first surface of the ring and slidingly coupled to the at least one first key groove of the orbiting scroll, and at least one second key that axially extends from the first surface of the ring and slidingly coupled to the at least one second key groove of the non-orbiting scroll. The first and second keys may be provided along a circumferential direction. This may allow processability of a one-way anti-rotation ring. Further, increase in weight may be prevented while reducing deformation by providing a weight-reduced portion in addition to a reinforcing portion.

Scroll compressor having anti-rotation ring

A scroll compressor is provided that may include a frame; a non-orbiting scroll provided with a non-orbiting wrap formed on a first side surface of a non-orbiting end plate in an axial direction; an orbiting scroll provided with an orbiting wrap formed on a first side surface of the orbiting end plate in the axial direction and engaged with the non-orbiting wrap to form a compression chamber; a plurality of first guides disposed between the frame and the non-orbiting scroll to be located radially outward from the non-orbiting wrap; and a plurality of second guides provided on the orbiting end plate to be located radially outward from the orbiting wrap, respectively, so as to allow an orbiting motion of the orbiting scroll together with the first guides.

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Seoul, South Korea

Changeol Jo