KR100390780B1 - Reverse rotation preclusion apparatus for scroll compressor - Google Patents

Abstract

The present invention relates to an apparatus for preventing reverse rotation of a scroll compressor, comprising: an electric motor unit having a casing for forming an accommodating space therein; and a rotating shaft disposed inside the casing along a vertical direction of the casing; The fixed scroll having an upper frame disposed in an upper region, a fixed scroll fixedly disposed on an upper side of the upper frame with an involute-shaped fixed blade, and an involute-shaped turning blade that forms a compression space therebetween; A scroll compressor having a pivoting scroll interposed between the upper frame and the upper frame, the scroll compressor comprising: at least one locking jaw formed integrally with the pivoting scroll at a side edge of the pivoting scroll; At least one pivotal shaft formed at a point spaced a predetermined distance from the pivoting scroll in a radial direction of the pivoting scroll; A reverse rotation prevention lever having one end coupled to the rotational shaft so as to be relatively movable, and the other end being in contact with the locking jaw to prevent reverse rotation of the swing scroll; It characterized in that it comprises an elastic means for applying an elastic force to the reverse rotation prevention lever such that the reverse rotation prevention lever is in elastic contact with the outer circumferential surface of the swing scroll. Thereby, the reverse rotation prevention apparatus of the scroll compressor which can prevent the reverse rotation of a turning scroll so that the damage and the noise of a component by the reverse rotation can be prevented.

Description

REVERSE ROTATION PRECLUSION APPARATUS FOR SCROLL COMPRESSOR}

The present invention relates to an apparatus for preventing reverse rotation of a scroll compressor, and more particularly, to reverse rotation of a rotating scroll to prevent component damage and noise caused by reverse rotation. It relates to a rotation preventing device.

In general, the scroll compressor is disposed so that a predetermined compression chamber is formed between a hermetic casing provided with a suction pipe and a discharge pipe, a fixed scroll having an involute-shaped fixed blade inside the sealed casing, and a fixed blade. A swinging scroll having a swingable swinging vane and an electric motor disposed inside the closed casing to provide driving force to the swinging scroll.

1 is a longitudinal sectional view of a conventional scroll compressor. As shown in the drawing, the scroll compressor includes a cylindrical casing 11 forming a sealed space therein, a compression unit 21 accommodated in the upper region of the casing 11 to compress the refrigerant, and a compression unit 21. It has an electric motor portion 31 disposed below the) to provide a driving force to the compression portion (21).

The suction pipe 12 is coupled to the upper one side region of the casing 11 to suck the refrigerant from the outside, and the discharge cap 13 is coupled to the upper region of the casing 11 to block the upper opening. One side of the upper cap 13 is provided with a discharge pipe 14 so that the refrigerant can be discharged, the space between the casing 11 and the discharge cap 13 between the casing 11 and the discharge cap 13 The high and low pressure separator 15 is partitioned and divided into a high pressure region and a low pressure region.

The compression unit 21 is a fixed scroll 23 having an involute fixed blade 24 formed below the high and low pressure separating plate 15, and a turning blade disposed corresponding to the fixed blade 24 to form a compression chamber. It is comprised including the turning scroll 25 provided with the 26.

An upper frame 29 is installed below the swing scroll 25, and a fixed scroll 23 is fixed to the upper side of the upper frame 29 by a fixed bolt 28. The lower side of the upper frame 29 is provided with an electric motor unit 31 so as to pivot the swinging scroll (25).

The electric motor part 31 includes a stator 33 fixedly disposed inside the casing 11, a rotor 35 accommodated to be rotatable inside the stator 33, and an axis of the rotor 35. It has a rotation axis 37 rotatably coupled to the body. An eccentric portion 39 is formed at the upper end of the rotating shaft 37, and the eccentric portion 39 is inserted and coupled to the lower side of the turning scroll 25 so as to allow the pivoting movement of the pivoting scroll 25. have.

A lower frame 41 is disposed in the lower region of the rotary shaft 37, and an oil feeding device 43 is provided at the lower end of the rotary shaft 37 to supply the oil 44 contained in the bottom of the casing 11. .

By this configuration, when power is applied to the electric motor unit 31, the rotor 35 is rotated integrally with the rotary shaft 37 about the rotary shaft 37, the eccentric portion 39 of the rotary shaft 37 The rotating scroll 25 coupled to the suction or compression of the refrigerant by performing a relative swinging movement with respect to the fixed scroll 23 along the rotation axis 37. At this time, the oil feeding device 43 provided below the rotating shaft 37 rotates integrally with the rotating shaft 37 to feed the oil 44 to the upper region.

By the way, in such a conventional scroll compressor, when the electric motor unit 31 is composed of a single-phase motor, when the load becomes relatively large as compared to the rotational torque, reversal of the rotational direction occurs. In this case, when the reversal phenomenon occurs, the turning blades 26 of the turning scroll 25 and the fixed blades 24 of the fixed scroll 23 are not only damaged while being in contact with each other, but also generate continuous hitting noise. have.

In addition, when the rotating shaft 37 is reversely rotated, the oil supply device 43 provided at the lower portion of the rotating shaft 37 is reversely rotated so that the supply of the oil 44 is not smooth. There is a problem that the loss of the function.

Accordingly, it is an object of the present invention to provide an apparatus for preventing the reverse rotation of a scroll compressor which can prevent the reverse rotation of the turning scroll so as to prevent the damage and the noise of the components due to the reverse rotation.

1 is a longitudinal sectional view of a conventional scroll compressor;

2 is a view showing a planar arrangement state of the reverse rotation preventing device of the scroll compressor according to an embodiment of the present invention,

3 and 4 are views showing the anti-rotation lever region at the time of forward rotation and reverse rotation of the turning scroll of FIG.

Explanation of symbols on the main parts of the drawings

11: casing 21: compression

25: turning scroll 26: turning profit

29: upper frame 30: scroll support boss

31: electric motor part 51: locking jaw

52: depression 54: rotation axis

55: reverse rotation prevention lever 56a: shaft bearing part

56b: contact end 57: spring member

58: stopper

The object is, in accordance with the present invention, an electric motor unit having a casing for forming a receiving space therein, a rotating shaft disposed in the casing along the vertical direction of the casing, and disposed in an upper region of the rotating shaft. Between the fixed frame and the upper frame having an upper frame, a fixed scroll having an involute-shaped fixed blade and fixedly placed on the upper side of the upper frame, and an involute-shaped turning blade that forms a compression space therebetween. A scroll compressor having a pivoting scroll interposed therebetween, the scroll compressor comprising: at least one locking jaw formed integrally with the pivoting scroll at a side edge of the pivoting scroll; At least one pivotal shaft formed at a point spaced a predetermined distance from the pivoting scroll in a radial direction of the pivoting scroll; A reverse rotation prevention lever having one end coupled to the rotational shaft so as to be relatively movable, and the other end being in contact with the locking jaw to prevent reverse rotation of the swing scroll; And a resilient means for applying an elastic force to the reverse rotation prevention lever such that the reverse rotation prevention lever is elastically contacted with the outer circumferential surface of the swing scroll.

Here, the locking step is preferably one side edge of the recessed portion formed from the outer peripheral surface along the longitudinal direction of the swing scroll to accommodate the contact end region of the reverse rotation prevention lever.

The stopper may further include a stopper disposed inside the pivot shaft along a radial direction of the pivot scroll to limit rotation in a direction in which the contact end of the reverse rotation prevention lever approaches the pivot scroll side. .

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

2 is a view showing a planar arrangement state of the reverse rotation prevention device of the scroll compressor according to an embodiment of the present invention, Figures 3 and 4 are reverse rotation during the forward and reverse rotation of the turning scroll of Figure 2, respectively The prevention lever area is shown. The same reference numerals are given to the same and equivalent parts as in the conventional configuration, which will be described with reference to FIG. As shown in these figures, the upper frame 29 is fixedly arranged in the inner upper region of the casing 11 having a cylindrical shape, and the fixed scroll 23 can be supported in the upper region of the upper frame 29. A plurality of scroll support bosses 30 are formed so as to protrude upward and spaced apart along the circumferential direction. A pivoting scroll 25 having an involute swing blade 26 is disposed inside the scroll support boss 30 so as to be pivotable, and at one side of the pivoting scroll 25 according to an embodiment of the present invention. Reverse rotation prevention device of scroll compressor is installed.

The reverse rotation prevention device of the present scroll compressor is fixed along the up and down direction at a position spaced apart from the outer circumferential surface by a locking jaw 51 formed at the side edge of the turning scroll 25 and the outer circumferential surface along the radial direction of the turning scroll 25. The rotating shaft 54 is disposed, and one end is coupled to the rotation shaft 54 so as to be relatively movable, and the other end is configured to include a reverse rotation preventing lever 55 extended to be in contact with the outer circumferential surface of the turning scroll (25) have.

On the outer circumferential surface of the revolving scroll 25 is formed a recess 52 recessed to open to the rear side with respect to the rotational direction during the forward rotation of the revolving scroll 25, the depression disposed on the front side during the forward rotation of the revolving scroll 25 The edge of the portion 52 functions as a locking jaw 51 during reverse rotation.

On the other hand, the upper surface of the upper frame 29, the rotating shaft 54 is formed to protrude along the vertical direction, one end of the reverse rotation preventing lever 55 is coupled to the rotating shaft 54 so as to be relatively rotatable. At one end of the anti-rotation lever 55 is formed a shaft receiving portion 56a which can be coupled to receive the rotation shaft 54, the rotating scroll 25 on the opposite side of the shaft receiving portion 56a along the longitudinal direction The contact end portion 56b is bent to the center side of the contact surface and in contact with the outer circumferential surface of the turning scroll 25.

A stopper 58 is formed on the inner side of the shaft accommodating portion 56a along the radial direction of the turning scroll 25 so as to suppress rotation in the direction in which the anti-rotation lever 55 approaches the turning scroll 25 side. On the opposite side of the stopper 58 with the reverse rotation prevention lever 55 interposed therebetween, the contact end 56b of the reverse rotation prevention lever 55 can elastically contact the outer circumferential surface of the turning scroll 25. A coil-shaped spring member 57 that applies an elastic force is provided.

By this configuration, when power is applied to the electric motor unit 31 and the rotor 35 and the rotating shaft 37 rotate, the turning scroll 25 is elastically pressurized by the spring member 57 to reverse rotation. In a state in which the contact lever 56b of the prevention lever 55 is in contact with each other elastically, it rotates relative to suck and compress the refrigerant.

On the other hand, when the reverse phenomenon occurs, the reverse rotation preventing lever 55 is caught by the contact end 56b enters the interior of the depression 52 in a state in which the reverse rotation prevention lever 55 is in elastic contact with the outer circumferential surface of the swing scroll 25. By preventing the rotation of the jaw 51, the turning scroll 25 is prevented from reverse rotation. When the reverse rotation of the turning scroll 25 is stopped, the overload prevention device (not shown) cuts off the power supplied to the electric motor part 31, whereby the electric motor part 31 stops driving.

In the above-described and illustrated embodiments, the case in which the pivot shaft and the stopper are configured to be fixed to the upper frame has been described as an example, but may be configured to be fixedly coupled to the bottom surface of the fixed scroll.

In addition, in the above-described and illustrated embodiments, the case in which the locking step is formed by forming a depression recessed on the outer circumferential surface of the turning scroll is given. The locking step may be formed so as to protrude to face.

As described above, according to the present invention, by forming a locking jaw in the turning scroll, and by interlocking with the locking jaw on one side of the turning scroll to provide a reverse rotation prevention lever to prevent the reverse rotation of the turning scroll, due to the reverse rotation A reverse rotation preventing device for a scroll compressor is provided to prevent damage to one part and generation of noise.

Claims (3)

An electric motor unit having a casing for forming a receiving space therein, a rotating shaft disposed in the casing in the vertical direction of the casing, an upper frame disposed in an upper region of the rotating shaft, and an involute-shaped fixed blade A rotating scroll which is fixedly disposed on the upper side of the upper frame and an involute-shaped turning blade that forms a compression space between the fixed blade and the rotating scroll interposed between the fixed scroll and the upper frame to be pivotable. A scroll compressor comprising: at least one locking jaw formed so as to be pivotally integral with the swing scroll at a side edge of the swing scroll; At least one pivotal shaft formed at a point spaced a predetermined distance from the pivoting scroll in a radial direction of the pivoting scroll; A reverse rotation prevention lever having one end coupled to the rotational shaft so as to be relatively movable, and the other end being in contact with the locking jaw to prevent reverse rotation of the swing scroll; And a resilient means for applying an elastic force to the reverse rotation prevention lever such that the reverse rotation prevention lever elastically contacts an outer circumferential surface of the swing scroll. The method of claim 1, The latching jaw is a reverse rotation prevention device of a scroll compressor, characterized in that one side edge of the depression formed in the outer peripheral surface along the longitudinal direction of the swing scroll to accommodate the contact end region of the reverse rotation prevention lever. The method according to claim 1 or 2, And a stopper disposed inside the pivot shaft along a radial direction of the pivot scroll to limit rotation in a direction in which the contact end of the reverse rotation prevention lever approaches the pivot scroll side. Reverse rotation prevention device.