KR100308284B1 - Scounter revolution interruption device of a scroll compressor - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reverse rotation preventing device of a scroll compressor. In the conventional reverse rotation preventing device, since a check valve is freely installed inside a valve housing, the check valve responds to sudden pressure changes during operation. The valve noise is generated by the pressure difference below, and there are many problems such as reverse rotation because some of the gas in the compression mechanism part flows backward in the early stage after the operation stops. The crankshaft is interlocked with the rotor of the motor mounted on it, and the fixed scroll formed with the involute wrap is fixed to the upper part of the main frame, and the wrap formed on the fixed scroll swings with the slide bush for compression movement. Scroll pressure is provided so that the wrap of the scroll is rotatably engaged to constitute the compression mechanism portion. In the present invention, the reverse rotation preventing member is rotatably coupled to the crankshaft to prevent the reverse rotation occurring during the stop during operation, thereby effectively preventing the reverse rotation generated during the stop during the operation in the scroll compressor. It can improve the performance of the device by eliminating the loss of gas flow path, and can reduce the noise generated in the high compression ratio and eliminate the valve noise caused by the use of non-return valve, so that the device can be used in a quiet state all the time. It is easy to assemble and increase productivity.

Description

Anti-rotation device of scroll compressor {SCOUNTER REVOLUTION INTERRUPTION DEVICE OF A SCROLL COMPRESSOR}

The present invention relates to an apparatus for preventing reverse rotation of a scroll compressor, and more particularly, to effectively prevent reverse rotation generated when the scroll compressor is stopped during operation.

In the conventional conventional scroll compressor, as shown in FIGS. 1 and 2, main and lower frames 16 and 5 are respectively installed on upper and lower portions of a sealed container 15 having a predetermined internal volume. And a stator 17 and a rotor 7 constituting the motor 6 are disposed between the lower frames 16 and 5, and the rotor 7 rotates through the center of the rotor 7. Eccentric portion 18 is formed on the upper end of the crankshaft (1a) is installed so as to interlock, the eccentric portion (18) is variable in the radial direction slide bush 19 receives the rotational force of the crankshaft (1a) in the tangential direction ) Is inserted.

In addition, a fixed scroll 11 having an involute wrap 11a is fixed on the main frame 16, and a compression movement while sliding with the slide bush 19 is provided on the wrap 11a formed on the fixed scroll 11. The wrap 9a of the swinging scroll 9 is pivotally engaged so that the lower portion of the swinging scroll 9 is inserted into the eccentric portion 18 of the crankshaft 1a. It is coupled to, the Old Dam ring 10, which is a rotation prevention mechanism for preventing the rotation of the swinging scroll 9 is coupled between the lower surface of the swinging scroll (9) and the upper surface of the main frame (16).

The high and low pressure separating plate 20 separating the inside of the sealed container 15 into a high pressure portion and a low pressure portion is coupled to the upper surface of the fixed scroll 11 in the sealed container 15 by a plurality of bolts 21. The check valve 22 and the valve housing 23 for controlling the flow of the high-temperature and high-pressure refrigerant gas compressed in the pocket space, which is a compression space, are coupled to the center of the high and low pressure separator 20, and the sealed container 15 ), A suction pipe 12 and a discharge pipe 14 through which the refrigerant gas is sucked and discharged are provided, and a discharge port 13 is formed in the center of the fixed scroll 11, and The lower portion is configured to be filled with the oil supplied to the sliding portion.

Operation of the scroll compressor including each component as described above, first, when the rotor 7 of the motor 6 is rotated by the applied current, the crank shaft ( While rotating 1a), the pivoting scroll 9 is circular, i.e., orbital, with the eccentric distance of the eccentric portion 18 as a radius.

The pivoting scroll 9 is pivoted by turning members at a distance apart from the center of the crankshaft 1a by a turning radius while the rotation is prevented by the old dam ring 10 which is a rotation preventing mechanism. By the swinging movement of the swinging scroll 9 a pocket, which is a compression space, is formed by the laps 11a and 9a of the swinging and scrolling 11 and 9, which pocket is centered by the continuous swinging movement. While moving, the volume is reduced to compress the refrigerant gas sucked in and discharged through the discharge port 13 of the fixed scroll 11.

The refrigerant gas in the high temperature and high pressure state compressed in the pocket formed by the laps 11a and 9a of the fixed and swinging scrolls 11 and 9 by the swinging movement of the swinging scroll 9 is discharge port of the fixed scroll 11. Discharged through the high pressure part through the through hole 20a of the high and low pressure separating plate 20 which separates the high pressure part and the low pressure part and discharges through the high pressure part, and the refrigerant gas introduced into the high pressure part is discharged through the condenser 14. Omitted).

When the scroll compressor is stopped for a while and then operated again, the gas of the high pressure portion flows back to the low pressure portion, and the wrap 11a of the fixed and swinging scrolls 11 and 9 is discharged through the discharge port 13. It is introduced into the inside of the pocket formed by 9a) and rotates the revolving scroll 9 reversely so as not only to cause breakage and noise of the wraps 11a and 9a, but also to prevent the compression efficiency from being lowered. The check valve 22 and the valve housing 23 provided on the plate 20 serve to prevent the gas of the high pressure portion from flowing back to the low pressure portion.

That is, during normal operation of the scroll compressor as shown in FIG. 2, the compressed gas pushes up the check valve 22 upward through the through hole 20a of the high and low pressure separator 20 to form a gas flow path. At the time of stopping during operation, the discharge mechanism is pushed downward through the through hole 24 of the valve housing 23 to prevent the discharge gas from flowing backward, thereby preventing the compression mechanism from rotating backward.

However, since the check valve 22 is installed in the valve housing 23 in a free state in the conventional reverse rotation preventing device, the check valve 22 responds to sudden pressure changes during operation. Valve noise is generated by the pressure difference, and there are many problems such as reverse rotation because some of the gas inside the compression mechanism part reverses at the initial stage after the operation stops.

Accordingly, the present invention is to solve the above problems, it is possible to effectively prevent the reverse rotation generated during the stop during operation in the scroll compressor to eliminate the loss of the flow path of the compressed gas to improve the performance of the device It is an object of the present invention to provide a reverse rotation preventing device of a scroll compressor that can improve not only the noise generation at the high compression ratio.

1 is a vertical cross-sectional view showing a conventional scroll compressor.

Figure 2 is an enlarged view showing the reverse rotation prevention device of FIG.

Figure 3 is a longitudinal cross-sectional view showing the present invention

4A and 4B are cross-sectional views taken along line A-A of FIG. 3 showing an operating state of the scroll compressor according to the present invention during normal operation and reverse rotation, respectively.

Explanation of symbols on the main parts of the drawings

One; Crankshaft 1S; Cutting plane

2; Seating groove 3; Reverse rotation prevention member

3S; Stop surface 4; Push pin

5; Lower frame

In order to achieve the above object, the present invention is provided with a crankshaft interlocked with a rotor of a motor mounted inside the sealed container, a fixed scroll having an involute-shaped wrap is fixed on the top of the main frame, fixed scroll A scroll compressor comprising a slide bush and a sliding scroll lap that slides in compression while sliding to be pivotably engaged with a wrap formed in the wrap compressor, wherein a cutting surface is formed on one side of the crankshaft, and an outer circumferential surface of the lower end of the crankshaft. A reverse rotation preventing member is rotatably supported by a fixing pin on one side of the seating groove formed in the rear recess, and at both ends of the reverse rotation preventing member, the reverse rotation preventing member rotates to prevent the reverse rotation occurring when stopped during operation. No more movement in contact with the cutting surface formed on one side of the crankshaft and the inner circumferential surface of the lower frame, respectively It provides an anti-reverse rotation of the scroll compressor wherein a stop surface is formed to prevent.

Hereinafter, preferred embodiments of the present invention for achieving the above object will be described in detail with reference to the accompanying drawings.

Figure 3 is a longitudinal cross-sectional view showing the present invention, Figures 4a and 4b is a cross-sectional view taken along line AA of Figure 3 showing the operating state of the scroll compressor according to the invention during normal operation and reverse rotation, respectively, the same as in the prior art The same reference numerals are given to the parts to describe the present invention.

The present invention has a seating groove (2) is formed on the outer peripheral surface of the lower end of the crankshaft (1) to be installed in the scroll compressor, one side of the seating groove (2) to prevent the reverse rotation to prevent the reverse rotation generated during operation stop The member 3 is rotatably coupled by the fixing pin 4, and both ends of the reverse rotation preventing member 3 prevent the reverse rotation generated when the reverse rotation preventing member 3 stops during operation. The stop surface 3S is formed in contact with the cutting surface 1S formed on one side of the crankshaft 1 and the inner circumferential surface of the lower frame 5 so as not to move any more during rotation.

Referring to the operation of the present invention configured as described above with reference to Figures 1 and 3 to 4b as follows.

First, when power is applied to the scroll compressor, when the rotor 7 of the motor 6 is rotated by the applied current, the crankshaft 1 coupled together by the rotation of the rotor 7 rotates. While turning the eccentric distance of the eccentric portion 8 as a radius, the turning scroll 9 is prevented from rotating by the old dam ring 10, which is a rotation preventing mechanism, and is a distance separated by the turning radius from the center of the crankshaft 1 as the origin. You will be a member of the club and you will have a turning campaign.

At this time, a pocket, which is a compression space, is formed by the laps 11a and 9a of the fixed and swivel scrolls 11 and 9 by the swivel movement of the swivel scroll 9, and such a pocket is used for the continuous swivel movement. The volume is reduced while moving to the center by compressing the refrigerant gas sucked through the suction pipe 12 is discharged through the discharge port 13 of the fixed scroll 11 to flow into the high pressure portion, the refrigerant gas introduced into the high pressure portion The discharge pipe 14 is introduced into the condenser.

In the normal operation of the scroll compressor as described above, the anti-rotation member (3) coupled to one side of the seating groove (2) formed on the outer peripheral surface of the lower end of the crankshaft (1) by the fixing pin (4) Is rotated together with the crank shaft (1) in a state attached to the crank shaft (1) as shown in FIG.

On the other hand, in the case of stopping the scroll compressor that normally operates as shown in FIG. 4A, the compression chamber gas and the discharged refrigerant gas between the fixed and swinging scrolls 11 and 9 flow back to the low pressure part. In this case, the reverse rotation of the present invention is performed. In the state as shown in FIG. 4A, the preventing member 3 is separated from the crankshaft 1 and fixed to the center of the fixing pin 4, as shown in FIG. 4B, respectively. ) Is in contact with the inner circumferential surface of the cutting surface (1S) and the lower frame (5) formed on one side of the crankshaft (1), respectively, so as to hold it so that it can no longer be moved to prevent the reverse rotation generated during stop during operation .

As described above, the present invention can effectively prevent the reverse rotation generated when the scroll compressor is stopped during operation, thereby eliminating the loss of the flow path of the compressed gas, thereby improving the performance of the device, high compression ratio It is possible to reduce the noise in the system and eliminate the valve noise due to the use of non-return valve, so that the machine can always be used in a quiet state, and the assembly is easy to increase productivity. It is a useful invention.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the present invention may be commonly used in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the following claims. Anyone with knowledge will be able to make various changes.

Claims (1)

A crankshaft interlocked with a rotor of the motor mounted inside the sealed container is installed, and a fixed scroll having an involute wrap is fixed to the upper part of the main frame, and a wrap formed on the fixed scroll is compressed with a slide bush. In a scroll compressor configured to pivotally engage a lap of a swinging scroll to be pivotably engaged, a scroll surface is formed on one side of the crankshaft and prevents reverse rotation on one side of a seating groove formed on the outer peripheral surface of the lower end of the crankshaft. The member is rotatably supported by a fixing pin, and both ends of the reverse rotation preventing member have a cutting surface and a lower frame formed on one side of the crankshaft during rotation to prevent reverse rotation occurring when the reverse rotation preventing member is stopped during operation. Stop surfaces for contacting the inner circumferential surface and preventing further movement Scroll reverse rotation prevention device of the compressor, characterized by.