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Hermetic scroll compressor

Inactive Publication Date: 2005-03-24
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017] An object of the present invention is to provide a scroll compressor with an improved upper frame structure, which is smoothly lubricated even when a compressing portion of the scroll compressor is overloaded.
[0018] Another object of the present invention is to provide a scroll compressor in which components is prevented from being worn by friction, and generation of frictional heat as well as generation of noise and vibration is also prevented.

Problems solved by technology

However, when the related art scroll compressor as described above is overloaded during a compressing process, the orbiting scroll is tightly contacted with the thrust surface.
As the result, the oil from the oil pocket cannot be sufficiently supplied to the fractional portion between the orbiting scroll and the upper frame.
Furthermore, the oil cannot be smoothly supplied to a fractional surface between the orbiting scroll and an upper key of an Oldham ring, and also to a fractional surface between a lower key of the Oldham ring and the upper frame.
As described above, since the oil cannot be sufficiently supplied to the fractional portions, there are some problems that components are severely worn by fraction and a change in oil characteristic is occurred by fractional heat.
In addition, there is a further problem that noise and vibration is generated by the fraction.

Method used

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  • Hermetic scroll compressor
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Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0036] First Embodiment

[0037] Referring to FIG. 1, a scroll compressor includes a driving motor 70 having a rotor 71 and a stator 72, a driving shaft 79 which is rotated by rotation of the driving motor 70 and has an eccentric portion 74 at an upper portion thereof, and an upper frame 40 which is fitted to an upper side of the driving shaft 79 so as to support the driving shaft 79 and has an oil pocket 78 at an edge portion of a center groove.

[0038] The scroll compressor further includes a suction portion having a suction pipe 93 for introducing fluid from an outside and a suction chamber 94. In detail, a sliding bush 73 is inserted onto an outer surface of the eccentric portion 74 so as to be surface-contacted with the eccentric portion 74.

[0039] The scroll compressor further includes a scroll compressing portion having an orbiting scroll 60 which is positioned at an upper side of the upper frame 40, for compressing coolant sucked through the suction pipe 93 by an orbiting motion...

second embodiment

[0055] Second Embodiment

[0056]FIG. 4 is a cross-sectional view of a hermetic scroll compressor according to another embodiment of the present invention.

[0057] Referring to FIG. 5, the upper frame 40 according to the present invention comprises a thrust surface 41 which is contacted with a lower surface of an orbiting scroll 60, a lower key groove 42 which is accommodated in an Oldham ring (not shown) so as to be linearly reciprocated, and an oil pocket 44 formed at a center portion of the upper frame 40 so that the oil is accommodated therein.

[0058] In order for the oil from the oil pocket 44 to be run to the lower key 42, there is provided an oil hole 45 formed to penetrate from one end to the other end of the lower key 42.

[0059]FIG. 5 is a perspective view of an upper frame having an oil hole according to the present invention, and FIG. 6 is a plan view of the upper frame.

[0060] Referring to FIGS. 5 and 6, the oil hole 45 of the present invention is formed at a desired depth f...

third embodiment

[0062] Third Embodiment

[0063]FIG. 7 is a cross-sectional view of a scroll compressor according to yet another embodiment of the present invention.

[0064] Referring to FIG. 7, an upper frame of a scroll compressor according to the present invention comprises a oil groove 43 formed at an upper side surface thereof, and an oil hole 45 formed at a position which is below a bottom surface of the oil groove 43 in a desired length.

[0065] Therefore, the oil in the oil pocket 44 is run along the oil groove 43 and the oil hole 45 to the lower key groove 42.

[0066]FIG. 8 is a perspective view of an upper frame of the scroll compressor according to the present invention, and FIG. 9 is a plan view of the upper frame.

[0067] Referring to FIGS. 8 and 9, the oil accumulated in the oil pocket 44 is moved along the oil hole 45 to the lower key groove 42. Thus, the oil can be more rapidly spread in comparison with in the related art scroll compressor in which the oil is spread through the thrust surf...

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PUM

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Abstract

Provided is a hermetic scroll compressor comprising: an upper frame which supports an upper side of a driving shaft and has an oil pocket at a center portion thereof so that oil can be accumulated therein; a fixed scroll fixed to the upper frame; an orbiting scroll which is revolved between the fixed scroll and the upper frame so as to compress fluid; an Oldham ring having two upper keys inserted into a side of the orbiting scroll and two lower keys inserted into a side of the upper frame; a lower key groove formed at the upper frame so that the lower key is accommodated therein so as to be linearly reciprocated; and an oil supplying structure formed at a body of the upper frame so as to supply the oil from the oil pocket to the lower key groove. The friction generated between the orbiting scroll and the thrust surface of the upper frame can be minimized.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a hermetic scroll compressor, and more particularly, to a scroll compressor adapted to smoothly supply oil to a thrust surface of an upper frame and a lower key portion of an Oldham ring to prevent components from being worn by friction and also prevent generation of frictional heat. [0003] 2. Description of the Related Art [0004] Generally, a compressor is a means for converting mechanical energy into compressive energy, and largely classified into a reciprocating type, a scroll type, a centrifugal type and a vane type. Particularly, a scroll compressor is widely used in an air conditioner and a refrigerator. [0005] Further, the scroll compressor can be classified into a low-pressure scroll compressor and a high-pressure scroll compressor. [0006] In detail, the scroll compressor is classified into the low-pressure scroll compressor and the high-pressure scroll compressor according a...

Claims

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Application Information

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IPC IPC(8): F04C18/02F04C23/00F04C29/02
CPCF04C18/0215F04C29/028F04C29/023F04C23/008F04C18/02
Inventor LEE, DONG SOOHAM, KYOUNG HOON
Owner LG ELECTRONICS INC
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