KR20040097815A - Apparatus reducing noise for scroll compressor - Google Patents

Abstract

PURPOSE: A noise reduction device of a scroll compressor is provided to reduce noise produced by wrap contact during operation by differentiating wrap profiles of a fixed scroll and a rotary scroll and maintaining a gap between the fixed scroll and the rotary scroll during operation. CONSTITUTION: A scroll compressor constitutes a discharge system by having wraps(7a,8a) of a fixed scroll(7) and a rotary scroll(8). In a noise reduction device of the scroll compressor, a gap(10) is maintained, when the wraps of the fixed scroll and rotary scroll are started and operated. The wraps of the fixed scroll and rotary scroll are formed in each different wrap profiles. The wraps of the fixed scroll and rotary scroll are formed with each different thickness.

Description

Noise reduction device of scroll compressor {APPARATUS REDUCING NOISE FOR SCROLL COMPRESSOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise reduction device of a scroll compressor. In particular, the fixed scroll and the rotating scroll wrap are formed to maintain a gap during initial startup and operation so that they do not come into contact with each other to reduce startup noise during initial startup. The present invention relates to a noise reduction device of a scroll compressor for reducing operation noise.

1 is a longitudinal cross-sectional view of a conventional scroll compressor, FIG. 2 is a plan view of a discharge system of a conventional scroll compressor, FIG. 3 is a partially enlarged view of FIG. 2 and FIG. 4 is a partially enlarged view of FIG. It is.

As shown in the drawing, the conventional scroll compressor forms a main body and is hermetically sealed in a sealed container (1), an upper frame (2) coupled to an upper side of the sealed container (1), and the sealed container (1). It comprises a lower frame 3 coupled to the inner lower side of the stator (4) and the rotor (5) installed between the upper frame (2) and the lower frame (3).

And the center of the rotor (5) is coupled to the crankshaft (6) to rotate together in accordance with the rotation of the rotor (5), the fixed scroll (7) is fixed to the upper frame (2), A pivoting scroll 8 is engaged with the lower portion of the fixed scroll 7 so as to be pivotable, and a central portion of the lower portion of the pivoting scroll 8 is located at an upper side of the crankshaft 6 at a position away from the center of the crankshaft 6. It is coupled with the core 6a.

In addition, a separating plate 11 for separating the sealed container 1 is installed on the upper side of the fixed scroll (7), the upper part is provided with a discharge chamber 20 in which high pressure gas remains, and the lower pressure part (21) And a refrigerant suction pipe 12 is installed below the separator plate 11, and a discharge tube 13 through which the refrigerant gas compressed to the upper side where the separator plate 11 is installed is discharged. have. In addition, the lower portion of the sealed container 1 is filled with oil 22 supplied to the sliding portion inside the scroll compressor.

Such a conventional scroll compressor has the same profiles of the wraps 7a and 8a of the fixed scroll 7 and the turning scroll 8, and the wraps of the fixed scroll 7 and the turning scroll 8 7a) and (8a) have the same thickness.

Such a scroll compressor is first powered by the stator 4 and the rotor 5 inside the stator 4 rotates by interaction with the stator 4.

As a result, the crankshaft 6 press-fitted to the center of the rotor 5 rotates, and the turning scroll 8 provided on the upper eccentric portion 6a of the crankshaft 6 by the rotation of the crankshaft 6. ) Rotates eccentrically by the eccentric distance, wherein the turning scroll 8 is rotated at a distance separated by the turning radius from the center of the axis by the Old Daming 14. By the turning motion of the turning scroll 8, a compression chamber is formed between the turning scroll 8 and each wrap of the fixed scroll 7, and the compression chamber is subjected to continuous turning motion. By moving to the center by the volume is reduced to further compress the refrigerant gas sucked into the sealed container (1) through the inlet (7a) of the sealed container (1).

At this time, the extruded refrigerant is again discharged into the discharge chamber 20 through the discharge port 7b formed in the fixed scroll 7 and the discharge hole 11a formed in the separating plate 11, and the discharge chamber 20 The discharged compressed refrigerant gas is sent to another device forming a cycle through the discharge pipe 13 provided in the discharge chamber 20.

In addition, the conventional scroll compressor as described above has the same profile of the wraps 7a and 8a of the fixed scroll 7 and the turning scroll 8, and the fixed scroll 7 and the turning scroll 8. The wraps 7a and 8a have the same thickness, so the laps 7a and 8a of the fixed scroll 7 and the turning scroll 8 come into contact with the contact portions 9 on the inner and outer circumferential surfaces during start-up and operation. (7a), (8a) There is a problem in that the contact noise occurs, and there is a limit in the protection function of the mechanism such as the bypass hole and the turning scroll retraction distance when a large amount of liquid refrigerant is introduced.

The present invention has been made to solve the above-mentioned problems and defects as described above, by varying the wrap profile of the fixed scroll and the swing scroll to maintain a predetermined gap between the fixed scroll and the swing scroll wrap during operation, It is an object of the present invention to provide a noise reduction device of a scroll compressor that can reduce the generation of noise due to contact.

1 is a longitudinal sectional view of a conventional scroll compressor

Figure 2 is a plan view of the discharge system of a conventional scroll compressor.

3 is a partially enlarged view of FIG. 2;

4 is a partially enlarged view of FIG. 3.

5 is a plan view of the discharge system of the scroll compressor according to the present invention;

6 is a partially enlarged view of FIG. 5;

7 is a partially enlarged view of FIG. 6.

<Description of the symbols for the main parts of the drawings>

7: fixed scroll

7a: wrap

8: turning scroll

8a: wrap

10: gap

In order to achieve the above object, the noise reduction device of the scroll compressor according to the present invention has a different specification, for example, a different wrap profile, that is, a lap of a fixed scroll and a swing scroll to maintain a predetermined gap (interval) during startup and operation. Formed with different spiral windings and enlarged radial circles, thereby preventing contact of the lap during start-up and operation, thereby reducing contact noise and introducing a large amount of liquid refrigerant as the radial leakage increases. It has the protection function of the city mechanism.

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

5 is a plan view showing a discharge system of the scroll compressor according to the present invention, FIG. 6 is a partial enlarged view of FIG. 5 and FIG. 7 is a partially enlarged view of FIG.

Referring to FIG. 5 to FIG. 7 together with FIGS. 1 to 4 described above, the scroll compressor employing the present invention forms a main body and has a hermetically sealed container 1 and an inner upper side of the sealed container 1. An upper frame 2 coupled to the lower frame 3, a lower frame 3 coupled to the lower side of the sealed container 1, and a stator 4 installed between the upper frame 2 and the lower frame 3; It comprises a rotor (5).

And the center of the rotor (5) is coupled to the crankshaft (6) to rotate together in accordance with the rotation of the rotor (5), the fixed scroll (7) is fixed to the upper frame (2), A pivoting scroll 8 is engaged with the lower portion of the fixed scroll 7 so as to be pivotable, and a central portion of the lower portion of the pivoting scroll 8 is located at an upper side of the crankshaft 6 at a position away from the center of the crankshaft 6. It is coupled with the core 6a.

In addition, the lower wall of the swing scroll 8 is coupled to the old dam ring 14 to prevent the rotation of the swing scroll (8). In addition, a separating plate 11 for separating the airtight container 1 is installed at an upper side of the fixed scroll 7, and a discharge chamber 20 in which a high pressure gas remains at an upper portion thereof, and a low pressure portion 21 at a lower side thereof. , A refrigerant suction pipe 12 is installed below the separator plate 11, and a discharge tube 13 through which the refrigerant gas compressed to the upper side where the separator plate 11 is installed is discharged. .

In such a scroll compressor, the noise reduction device of the scroll compressor according to the present invention has a predetermined gap (10) during startup and operation between the fixed scroll (7) and the wrap (7a), (8a) of the swing scroll (8). ) Is maintained.

The wraps 7a, 8a of the fixed scroll 7 and the swinging scroll 8 are formed in different specifications, for example in different wrap profiles, and in an enlarged radial circle.

In addition, the wraps 7a and 8a of the fixed scroll 7 and the turning scroll 8 may be formed to have different thicknesses.

In the scroll compressor employing the noise reduction device of the scroll compressor according to the present invention, power is first supplied to the stator 4, and the rotor 5 inside the stator 4 interacts with the stator 4. Rotate

As a result, the crankshaft 6 press-fitted to the center of the rotor 5 rotates, and the turning scroll 8 provided on the upper eccentric portion 6a of the crankshaft 6 by the rotation of the crankshaft 6. ) Rotates eccentrically by the eccentric distance, wherein the turning scroll 8 is rotated at a distance separated by the turning radius from the center of the axis by the Old Daming 14. By the turning motion of the turning scroll 8, a compression chamber is formed between the turning scroll 8 and each wrap of the fixed scroll 7, and the compression chamber is subjected to continuous turning motion. By moving to the center by the volume is reduced to further compress the refrigerant gas sucked into the sealed container (1) through the inlet (7a) of the sealed container (1).

At this time, the extruded refrigerant is again discharged into the discharge chamber 20 through the discharge port 7b formed in the fixed scroll 7 and the discharge hole 11a formed in the separating plate 11, and the discharge chamber 20 The discharged compressed refrigerant gas is sent to another device forming a cycle through the discharge pipe 13 provided in the discharge chamber 20.

In addition, the noise reduction device of the scroll compressor according to the present invention is adopted so that the wraps 7a and 8a of the fixed scroll 7 and the swinging scroll 8 are formed with different specifications, for example, different wrap profiles and have a radius. Directional circle (circle) is formed in an enlarged form, and the fixed scroll (7) and the wrap scroll (8) of the wrap (7a, 8a) is formed of a different thickness from each other and the fixed scroll (7) and the swing Since a predetermined gap 10 is maintained between the wraps 7a and 8a of the scroll 8 during start-up and operation, this prevents contact of the wrap during start-up and operation, thereby reducing contact noise and reducing the radial direction. It has a mechanism to protect the mechanism part when a large amount of liquid refrigerant is introduced with increasing leakage amount.

The noise reduction device of the scroll compressor according to the present invention as described above has the effect of reducing the starting noise during the initial startup, the effect of reducing the operating noise during the operation, and the lap protection function due to the increase in the radial leakage during the liquid inflow. It has the advantage that the performance compared to the fixed radius is more advantageous.

Claims (3)

In a scroll compressor having a fixed scroll (7) and a rotating scroll (8) and wraps (7a), (8a) of the discharge system, the scroll (7a) of the fixed scroll (7) and the rotating scroll (8), Noise reduction device of a scroll compressor, characterized in that (8a) is formed so that a predetermined gap (10) is maintained during startup and operation. The noise reduction device of a scroll compressor according to claim 1, wherein the wraps (7a) and (8a) of the fixed scroll (7) and the swinging scroll (8) are formed in different wrap profiles. The noise reduction device of a scroll compressor according to claim 1, wherein the fixed scrolls (7) and the swing scrolls (7) and (8a) are formed to have different thicknesses.