KR20120076165A

KR20120076165A - Scroll compressor

Info

Publication number: KR20120076165A
Application number: KR1020100138196A
Authority: KR
Inventors: 노기섭
Original assignee: 엘지전자 주식회사
Priority date: 2010-12-29
Filing date: 2010-12-29
Publication date: 2012-07-09
Also published as: KR101718038B1

Abstract

In the scroll compressor according to the present invention, when the assembling direction of the old dam ring is changed by forming an interference part protruding in the old dam ring, the interference part interferes with the turning scroll and prevents the old dam ring and the turning scroll from being coupled. It is possible to recognize that the assembly direction of Olddamling has been changed, thereby preventing the wrong assembly of Olddamling.

Description

Scroll Compressor {SCROLL COMPRESSOR}

The present invention relates to an anti-rotation device of a scroll compressor.

In general, a hermetic compressor is provided with a driving motor for generating a driving force in the inner space of the hermetic container, and a compression unit for compressing the refrigerant while operating in combination with the driving motor. The hermetic compressor may be classified into a reciprocating type, a scroll type, a rotary type, a vibrating type, and the like according to a method of compressing a refrigerant. The reciprocating type, the scroll type and the rotary type are methods using the rotational force of the drive motor, and the vibration type is a method using the reciprocating motion of the drive motor.

The scroll compressor forms a pair of two compression pockets while the rotating scroll moves relative to the fixed scroll, and the refrigerant is compressed and discharged from the plurality of compression pockets.

The pivoting scroll is eccentrically coupled to the rotor of the drive motor by the crankshaft, and is coupled to a rotation prevention mechanism such as an old dam ring between the pivoting scroll and the fixed scroll so as to pivot.

To this end, the Oldham ring is formed on the upper surface of the body having a ring shape in the normal direction of the ring is combined with the fixed scroll is formed, the lower surface of the body protrudes in the normal direction of the ring and the rotating scroll and The lower key is formed to be combined. An upper key groove is formed on a lower surface of the fixed scroll so as to slide in a radial direction with an upper key of the old dam ring, and a lower key groove is formed on an upper surface of the swing scroll to slide in a radial direction with a lower key of the old dam ring. It is. The upper and upper key grooves are each formed in plural numbers so as to be symmetrical on both left and right sides, and the lower and lower key grooves are formed in plural numbers so as to be symmetrical to both left and right sides at positions having a phase difference of 90 degrees with respect to the upper and upper key grooves. have.

Here, the upper key and the lower key are formed to have different widths of both keys and corresponding key grooves so as to prevent the old dam ring from being reversed and misassembled.

In the scroll compressor as described above, the rotating scroll is to rotate and rotate at the same time with the rotor, but the rotational movement of the rotating scroll is suppressed by the old dam ring provided between the rotating scroll and the fixed scroll. Compressing the refrigerant during the idle movement.

However, in the conventional scroll compressor as described above, when the left and right directions of the old dam ring are assembled, the fixed scroll and the rotating scroll are assembled, but the compressor performance is deteriorated while the old dam ring does not operate smoothly when the compressor is operated. there was.

An object of the present invention, when assembling the old dam ring when the left and right directions are reversed, the interference between the old dam ring and the turning scroll or the old dam ring and the fixed scroll to prevent the assembly of the fixed scroll and the turning scroll in advance. It is to provide a scroll compressor that can.

In order to achieve the object of the present invention, the frame is fixed to the sealed container; A fixed scroll fixed to the frame; A rotating scroll provided between the frame and the fixed scroll to form a plurality of compression pockets together with the fixed scroll and eccentrically coupled to the rotor of the drive motor; And a rotating preventing mechanism coupled to the rotating scroll and the fixed scroll or between the rotating scroll and the frame to form a ring shape to prevent the rotating scroll of the rotating scroll. The rotation preventing mechanism is fixed to at least one side of the rotating preventing mechanism. An interfering portion having a predetermined height is formed to protrude so as to have a height of the scroll compressor.

1 is a longitudinal sectional view showing a scroll compressor of the present invention;
2 is a plan view showing an assembly state of the compression mechanism in the scroll compressor according to FIG.
Figure 3 is a longitudinal cross-sectional view showing the assembly state of the compression mechanism in the scroll compressor according to FIG.
4 and 5 are a perspective view and a plan view of the Oldham ring according to the present invention,
Figure 6 is a longitudinal cross-sectional view showing an incorrect assembly state of the Oldham ring in the scroll compressor applied Oldham ring according to the present invention,
7 and 8 are views of another embodiment of the scroll compressor according to the present invention.
Figure 9 and Figure 10 is another embodiment of the scroll compressor according to the present invention, when the old dam ring is provided between the main frame and the swing scroll longitudinal cross-sectional view showing the normal assembled state and the wrong assembled state of the old dam ring, respectively.

Hereinafter, the scroll compressor according to the present invention will be described in detail with reference to the embodiment shown in the accompanying drawings.

1 is a vertical cross-sectional view showing a scroll compressor of the present invention, Figure 2 is a plan view showing the assembly state of the compression mechanism in the scroll compressor according to Figure 1, Figure 3 is an assembly state of the compression mechanism in the scroll compressor according to Figure 1 4 and 5 are a perspective view and a plan view of an Oldham ring according to the present invention.

As shown in Figures 1 to 3, the scroll compressor according to the present invention, the inner space of the sealed container (1) is divided into a suction space 11 of the low pressure portion and the discharge space 12 of the high pressure portion, the sealed container A driving motor 2 for generating a rotational force is installed in the suction space 11 of (1), and the main frame 3 is fixed between the suction space 11 and the discharge space 12 of the sealed container 1. Is installed. A fixed scroll 4 is fixedly installed on an upper surface of the main frame 3, and is eccentrically coupled to the crank shaft 23 of the drive motor 2 between the main frame 3 and the fixed scroll 4. The swinging scroll 5 which forms two pairs of compression chambers P which move continuously with the fixed scroll 4 is installed so that rotation is possible. In addition, an old dam ring 6 is installed between the fixed scroll 4 and the revolving scroll 5 to prevent the revolving movement of the revolving scroll 5.

The inner space of the sealed container (1) is divided into a suction space (11) and a discharge space (12) by a fixed scroll (4), while the suction pipe (13) is coupled to communicate with the suction space (11). The discharge space 14 is coupled to the discharge tube 14 in communication.

Here, although not shown in the drawings, the sealed container is provided with a predetermined discharge space sealed and the suction space is a low pressure portion and the discharge space is a high pressure portion by a discharge plenum fixedly coupled to the fixed scroll (4), or The inner space of the sealed container may be divided into a suction space and a discharge space by a high and low pressure separator (not shown) fixed to an upper surface of the fixed scroll and in close contact with an inner circumferential surface of the sealed container.

The fixed scroll (4) is projected on the bottom surface of the hard plate portion 41 is formed with a fixed wrap 42 in the involute shape to form a compression chamber (P) together with the turning wrap (52) of the turning scroll (5). . A suction port 43 is formed on the outer circumferential surface of the hard plate portion 41 of the fixed scroll 4 so that the suction space 11 and the compression chamber P of the sealed container 1 communicate with each other. The discharge port 44 is formed at the center of the hard plate part 41 so that the compression chamber P and the discharge space 12 of the sealed container 1 communicate with each other. And, as shown in Figure 2, on the outer peripheral bottom surface of the hard plate portion 41 of the fixed scroll 4, the old dam ring seating groove 45 is formed in a ring shape, the old dam ring 6 is seated, the all The upper key recess 46 is formed on both sides of the damring seating groove 45 so that the upper key 62 of the old dam ring 6, which will be described later, is slidably inserted. The upper key groove 46 is formed long in the radial direction with a phase difference of 180 ° on both left and right sides.

The orbiting scroll 5 is protruded on the upper surface of the hard plate portion 51 to form an orbital wrap 52 in an involute shape to form a compression chamber P together with the fixed wrap 42. In addition, a lower key recess 53 is formed on the outer circumferential surface of the hard disk portion 51 of the swing scroll 5 so that the lower key 63 of the Oldham ring 6, which will be described later, is slidably inserted therein. . The lower key groove 53 has a plurality of lower key grooves 53 on the left and right sides at a position where the upper key groove 46 has a phase difference of 90 °, and is formed to be long in the radial direction with a phase difference of 180 ° from each other. And the hard disk portion 51 of the turning scroll 5 is formed to be smaller than the inner diameter of the body 61 of the body 61 of the Old Daming ring 6, which will be described later, the one side of the hard disk portion 51 of the turning scroll (5) Outward protrusions 54 are formed to support the bottom of the Oldham ring 6.

As shown in Figure 4 and 5, the Oldham ring 6 is formed with a ring-shaped body 61, the upper surface of the body 61 protrudes in the upward axial direction the fixed scroll (4) An upper key 62 is formed so as to slide in the upper key groove 46 of the upper part of the body 61. The upper key 62 protrudes in the downward axial direction of the ring on the lower surface of the body 61 to slide in the lower key groove 53 of the pivoting scroll 5. The lower key 63 is formed to be forcibly inserted. The upper key 62 and the lower key 63 may be formed in a hexahedral shape, respectively.

The body 61 of the old dam ring 6 is formed in a circular ring shape to be inserted into the old dam ring seating groove 45 of the fixed scroll 4. And the inner diameter of the body 61 may be formed larger than the outer diameter of the hard plate portion 51 of the turning scroll 5, in some cases less than or equal to the outer diameter of the hard plate portion 51 of the turning scroll (5) It may be formed.

The inner circumferential surface of one side of the body 61 (exactly, the position corresponding to the opposite side of the outward protrusion of the swinging scroll when the old dam ring is assembled) is inwardly projected to face the upper surface of the hard plate portion 51 of the swinging scroll 5. The protrusion 64 is formed.

In addition, one side of the body 61, the lower surface of the position that is substantially overlapping with the inwardly projecting portion 64 is located outside the outer circumferential surface of the turning scroll 5 according to the assembly direction of the old dam ring 6, interference The interference portion 65 which does not or interferes with the outward protrusion 54 of the turning scroll 5 is formed to protrude downward. When the interference portion 65 interferes with the outward protrusion 54 of the swing scroll 5, the body 61 of the old dam ring 6 is the pivot plate portion of the swing scroll 5 or the fixed scroll 4. 51 and 41, the old dam ring 6 is formed such that the lower key 63 of the old dam ring 6 and the lower key groove 53 of the swing scroll 5 are not coupled to each other. It is preferable to prevent the misassembly of the.

The position at which the interference portion 65 is formed is within the range of the inward protrusion 64, that is, within the center angle of the inward protrusion 64 connecting both ends of the inward protrusion 64 with the center of the old dam ring 6. At least a portion of the interference portion 65 is formed to overlap. The interference part 65 may be formed in a quadrangular shape as shown in the figure, but may be formed in various ways such as a hemisphere.

The upper key 62 is formed to be symmetrical to both left and right sides of the body 61, the lower key 63 is formed to be symmetrical to both left and right sides at a position having a phase difference of 90 ° with respect to the upper key 62. do.

Here, the upper key 62 and the lower key 63 are formed to have different widths of both keys and corresponding widths of the key grooves so as to prevent the old dam ring 6 from being reversed and misassembled.

In the drawings, 7 is a subframe, 8 is a check valve, 21 is a stator, and 22 is a rotor.

In the scroll compressor according to the present invention as described above, when the power is applied to the drive motor (2), when the rotational force is generated, the turning scroll (5) eccentrically coupled to the crank shaft (23) of the drive motor (2) is turning Two pairs of compression chambers P which are continuously moved between the fixed scroll 4 and the movement are formed. In the compression chamber P, the compression chamber P whose volume gradually decreases from the suction port (or suction chamber) 43 toward the discharge port (or discharge chamber) 44 is formed in successive steps.

Then, the refrigerant supplied from the outside of the sealed container 1 is introduced into the suction space 11 which is the low pressure portion of the sealed container 1 through the suction pipe 13, and the low pressure refrigerant of the suction space 11 is fixed scroll. It is introduced through the suction port 43 of (4) and is compressed while moving in the direction of the second intermediate compression chamber (P2) from the first intermediate compression chamber (P1) by the turning scroll (5), the fixed scroll (4) Through a discharge port 44 of a series of processes to be discharged to the discharge space 12 of the sealed container 1 is repeated.

On the other hand, the process of assembling the compression mechanism in the scroll compressor according to the present invention as described above are as follows.

That is, the fixed scroll 4 is turned upside down so that the bottom surface of the fixed plate 4 of the fixed scroll 4 faces upward, and the old dam ring 6 is placed in the old damling seating groove 45 of the fixed scroll 4. Insert At this time, the upper key 62 of the old dam ring 6 is inserted into the upper key groove 46 of the fixed scroll (4), respectively.

Next, the pivoting scroll (5) on the lower surface of the hard plate portion 41 of the fixed scroll (4) so that the pivoting wrap (52) of the pivoting scroll (5) is inserted into the fixed wrap (42) of the fixed scroll (4) Put it on. At this time, the lower key 63 of the old dam ring 6 is inserted into the lower key groove 53 of the swing scroll 5, respectively.

Here, as shown in FIG. 3, when the old dam ring 6 is assembled in the normal assembly direction, that is, the interference part 65 of the old dam ring 6 is positioned opposite to the outward protrusion 54 of the swing scroll 5. When assembled so that the interference portion 65 of the old dam ring 6 does not interfere with the outward protrusion 54 of the swing scroll 5, the lower key 63 and the swing scroll of the old dam ring 6 ( The lower key groove 53 of 5) can be inserted and coupled correctly. However, as shown in FIG. 6, when the old dam ring 6 is assembled in an abnormal assembly direction, that is, the left and right directions of the old dam ring 6 are reversed, the interference part 65 of the old dam ring 6 rotates. In the case of assembling toward the outward protrusion 54 of 5), the interfering portion 65 of the old dam ring 6 interferes with the outward protrusion 54 of the swing scroll 5 while the lower key of the old dam ring 6 63) and the lower key groove 53 of the turning scroll 5 is not inserted, so that the old dam ring 6 and the turning scroll 5 are not assembled.

In this way, the operator can recognize that the assembling direction of the old dam ring has been changed, thereby preventing the misassembly of the old dam ring.

Another embodiment of the scroll compressor according to the present invention is as follows.

That is, in the above-described embodiment, the interference portion is formed to be located outward from the outer circumferential surface of the turning scroll, but in the present embodiment, when the outer diameter of the turning scroll is larger than the outer diameter of the old damling, It is intended to prevent assembly.

To this end, as shown in FIG. 7, the interference part 65 is formed at one side of the lower surface of the old dam ring 6, and the hard plate part of the turning scroll 5 in which the interference part 65 is opposed to each other is formed. 51) the avoidance groove 55 is formed in the upper surface so that the interference portion 65 of the old dam ring 6 can be inserted.

The avoidance groove 55 is formed at a position at which the interference part 65 is inserted during normal assembly. In addition, the avoidance groove 55 may be formed to have a width such that the turning scroll 5 can smoothly turn in the state in which the interference part 65 of the old dam ring 6 is inserted. . In addition, a lubrication ring having wear resistance may be inserted into the avoidance groove 55.

When assembling the compression mechanism of the scroll compressor according to the present embodiment as described above, if the assembling direction of the old dam ring 6 is correct, the interference part 65 of the old dam ring 6 avoids the turning scroll 5. When the lower key 63 of the old dam ring 6 and the lower key groove 53 of the swing scroll 5 are inserted into the groove 55, the assembling direction of the old dam ring 6 is changed. The interference part 65 of the old dam ring 6 is placed on the upper surface of the hard plate part 51 of the swing scroll 5 so that the old dam ring 6 is lifted, and the lower key 63 and the swing scroll of the old dam ring 6 are lifted. The lower key groove 53 of 5) is not coupled. This prevents the worker from misassembling the old dam ring.

On the other hand, if there is another embodiment of the scroll compressor according to the present invention.

That is, the above-mentioned embodiments are embodiments for the case where the old dam ring is installed between the fixed scroll and the swing scroll, or the old dam ring is installed between the swing scroll and the main frame as in the present embodiment. Interferences may be formed in the.

9 and 10, an interference part 65 is formed at one side of the upper surface of the old dam ring 6, and the interference of the old dam ring 6 is formed on the bottom surface of the hard plate part 51 of the swing scroll 5. The avoidance groove 55 is formed so that the part 65 is inserted.

The evacuation groove 55 is formed at the position at which the interference part 65 is inserted during normal assembly of the old dam ring 6 as in the above-described embodiment. In addition, the avoidance groove 55 may be formed to have a width such that the swing scroll 5 can swing in the state where the interference portion 65 of the old dam ring 6 is inserted. In addition, a lubrication ring having wear resistance may be inserted into the avoidance groove 55.

Compressor part of the scroll compressor according to the present embodiment as described above to put the Oldham ring (6) on the main frame (2) and the upper key (not shown) of the Oldham ring is the lower key groove (not shown) of the turning scroll (5) The pivoting scroll 5 is inserted into the main frame 2 so as to be inserted into the main frame 2.

At this time, when the assembling direction of the old dam ring (6) is correct, the interference portion 65 of the old dam ring (6) is out of the outer peripheral surface so as not to interfere with the hard plate portion 51 of the swing scroll (5) or When the avoiding groove 55 is provided, the upper key of the old dam ring 6 and the lower key groove of the swing scroll 5 are inserted into the avoiding groove 55, and the old dam ring 6 When the direction of assembly of the switch is changed, the interference part 65 of the old dam ring 6 interferes with the outward protrusion 54 of the turning scroll 5 or the interference is placed on the upper surface of the hard plate part 51 and the turning scroll 5 ) Can be heard to prevent the turning scroll 5 and the old dam ring 6 from being combined, thereby preventing the old dam ring 6 from being misassembled.

2: main frame 4: fixed scroll
41: hard plate portion 42: fixed wrap
45: old damling seating groove 46: upper key groove
5: turning scroll 51: hard board part
52: turning wrap 53: lower key groove
54: outward projection 55: evacuation groove
6: olddamling 61: body
62: upper key 63: lower key
64: inward protrusion 65: interference

Claims

A frame fixed to the sealed container;
A fixed scroll fixed to the frame;
A rotating scroll provided between the frame and the fixed scroll to form a plurality of compression pockets together with the fixed scroll and eccentrically coupled to the rotor of the drive motor; And
And a rotation preventing mechanism coupled between the swing scroll and the fixed scroll or between the swing scroll and the frame to form a ring shape to prevent rotation of the swing scroll.
An interference part having a predetermined height is formed to protrude on at least one side of the anti-rotation device, and the anti-rotation device is inclined with respect to the seating surface while selectively interfering with a part of the surface facing the anti-rotation device. Built-in scroll compressor.

The method of claim 1,
The interference portion is formed on one side of the anti-rotation mechanism,
And a radially outward protrusion formed on an outer circumferential surface of the swing scroll to radially interfere with the interference portion of the anti-rotation mechanism.

The method of claim 2,
The anti-rotation mechanism is a scroll compressor having an inward protrusion is formed so as to face one side of the swing scroll.

The method of claim 3,
And the inwardly protruding portion is formed to overlap at least a portion within a central angle range of the interference portion.

The method of claim 1,
And an interference part is inserted into a portion of the surface facing the interference part such that an avoidance groove is formed such that the anti-rotation mechanism is balanced with respect to the seating surface.

The anti-rotation mechanism according to any one of claims 1 to 5, wherein
A body formed in a ring shape; And
And a key which is formed to protrude on the upper and lower surfaces of the body, respectively, and is slidably coupled to a key groove provided on a surface opposite to the upper and lower surfaces of the body.