Scroll compressor

Abstract

Disclosed is a scroll compressor including: a drive shaft provided to be rotatable by a drive source; an orbiting scroll including a disc-shaped orbiting base plate and an orbiting wrap protruding from the orbiting base plate and configured to be wound by the drive shaft; and a fixed scroll including a fixed base plate opposed to the movable base plate, a fixed wrap protruding from the fixed base plate and engaged with the movable wrap, and a fixed wrap extension protruding from the fixed base plate at a position radially spaced apart from the fixed wrap, and according to the scroll compressor of the present disclosure, overturning of the movable scroll can be suppressed.

Description

Technical Field

[0001] The present disclosure relates to a scroll compressor, and more particularly, to a scroll compressor configured to compress a refrigerant using a fixed scroll and a movable scroll. Background Art

[0002] Generally, an air conditioning device (A / C) for heating / cooling an interior space is installed in a vehicle. Such an air conditioning device is a component of a cooling system and includes a compressor configured to compress a low-temperature and low-pressure gaseous refrigerant introduced from an evaporator to convert it into a high-temperature and high-pressure gaseous refrigerant and supply the refrigerant to a condenser.

[0003] Compressors are classified into reciprocating compressors that compress refrigerant according to the reciprocating motion of pistons and rotary compressors that compress refrigerant while rotating. Reciprocating compressors include crank compressors that transmit driving force from a driving source to a plurality of pistons using a crank, swash plate compressors that transmit driving force to a shaft on which a swash plate is mounted, and the like according to power transmission from a driving source. Rotary compressors include vane rotary compressors that utilize a rotating rotary shaft and vanes, and scroll compressors that utilize a movable scroll and a fixed scroll.

[0004] Scroll compressors are widely used for refrigerant compression in, for example, air conditioning equipment because they can achieve a relatively higher compression ratio than other types of compressors and obtain a stable torque generated by smooth suction, compression, and discharge strokes of the refrigerant.

[0005] Figure 1 is a cross-sectional view illustrating a conventional scroll compressor, and Figure 2 It is along Figure 1 A cross-sectional view taken along line II.

[0006] Reference Figure 1 and Figure 2 A conventional scroll compressor includes a driving source 20 configured to generate a rotational force, a driving shaft 30 configured to rotate by the driving source 20, a movable scroll member 50 configured to revolve by the driving shaft 30, and a fixed scroll member 60 forming a compression chamber with the movable scroll member 50.

[0007] However, the conventional scroll compressor has a problem in that the movable scroll 50 turns over. Summary of the invention

[0008] Technical issues

[0009] Therefore, the present invention aims to provide a scroll compressor capable of suppressing the turnover of a movable scroll.

[0010] Technical Solution

[0011] One embodiment is a scroll compressor, which includes: a drive shaft, which is configured to be rotatable by a drive source; a movable scroll member, which includes a disc-shaped movable base plate and a movable scroll protruding from the driven base plate and configured to revolve around the drive shaft; and a fixed scroll member, which includes a fixed base plate opposite to the movable base plate, a fixed scroll protruding from the fixed base plate and engaged with the movable scroll, and a fixed scroll extension protruding from the fixed base plate at a position radially spaced apart from the fixed scroll.

[0012] The movable scroll may include a movable scroll inlet end portion provided on an outer peripheral portion of the movable base plate, and the fixed scroll may include a fixed scroll extension portion opposite to the movable scroll inlet end portion.

[0013] The fixed scroll may also include a fixed scroll inlet end portion arranged on the outer peripheral portion of the fixed base plate, a fixed scroll outlet end portion arranged at the center of the fixed base plate, and a fixed scroll spiral extending in a spiral shape from the fixed scroll inlet end portion to the fixed scroll outlet end portion, and the fixed scroll extension portion may be arranged at a position extending from the fixed scroll inlet end along the spiral shape to the opposite side of the fixed scroll spiral.

[0014] The inner peripheral surface of the fixed scroll extension may be formed to be contactable with the outer peripheral surface of the movable scroll inlet end portion.

[0015] An outer circumferential surface of the fixed wrap extension may be formed to have a roughness greater than a roughness of an inner circumferential surface of the fixed wrap extension.

[0016] A distal end surface of the fixed scroll extension may be formed to be contactable with the moving base plate.

[0017] The peripheral portion of the moving base plate may include a first peripheral portion arranged on one side of the moving scroll inlet end and a second peripheral portion arranged on the side opposite to the first peripheral portion based on the center of the moving base plate, and the first peripheral portion is capable of contacting the fixed scroll extension portion, and the second peripheral portion is capable of contacting at least one of the fixed scroll inlet end and the fixed scroll spiral.

[0018] A suction inlet may be formed between the fixed scroll inlet end and the fixed scroll extension.

[0019] The fixed scroll inlet end portion and the fixed scroll extension may be separated from each other by the suction inlet.

[0020] The fixed scroll extension may extend along a spiral shape to the suction inlet.

[0021] The fixed scroll may further include a fixed sidewall protruding from an outer peripheral portion of the fixed base plate, and the fixed wrap extension may include a contact portion contacting the fixed sidewall and a non-contact portion spaced apart from the fixed sidewall.

[0022] The fixed side wall may include a recessed portion formed to be recessed on an inner peripheral surface of the fixed side wall at a position opposite to the non-contact portion.

[0023] The fixed wrap extension may include at least one of a through hole penetrating the fixed wrap extension and a slit formed to be recessed from a distal end surface of the fixed wrap extension.

[0024] Through holes and slits may be formed in the non-contact portion.

[0025] A suction inlet may be formed between the fixed scroll inlet end and the fixed scroll extension, and the suction inlet may be formed to be larger than the through hole and the gap.

[0026] Beneficial effects

[0027] The scroll compressor according to the present disclosure includes: a drive shaft, which is arranged to be rotatable by a drive source; a movable scroll, which includes a disk-shaped movable base plate and a movable scroll protruding from the driven base plate and configured to be orbited by the drive shaft; and a fixed scroll, which includes a fixed base plate opposite to the movable base plate, a fixed scroll protruding from the fixed base plate and engaged with the movable scroll, and a fixed scroll extension protruding from the fixed base plate at a position radially spaced from the fixed scroll so as to suppress the turning of the movable scroll. Therefore, the flow of the movable scroll in the radial and axial directions is prevented, thereby preventing damage and noise degradation caused by collision between the fixed scroll and the movable scroll, preventing deterioration of compression efficiency due to leakage in the compression chamber and the back pressure chamber, and preventing damage to the bearing, eccentric bushing, drive shaft, etc. and deterioration of noise and vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a cross-sectional view illustrating a conventional scroll compressor,

[0029] Figure 2 It is along Figure 1 The cross-sectional view taken along line II in

[0030] Figure 3 is a cross-sectional view illustrating a fixed scroll member and a movable scroll member in a scroll compressor according to an embodiment of the present disclosure,

[0031] Figure 4 It's a picture. Figure 3 A cross-sectional view of the state in which the movable scroll member is orbiting,

[0032] Figure 5 It's a picture. Figure 3 A three-dimensional diagram of the fixed scroll,

[0033] Figure 6is a perspective view illustrating a fixed scroll member in a scroll compressor according to another embodiment of the present disclosure, and

[0034] Figure 7 is a perspective view illustrating a fixed scroll member in a scroll compressor according to still another embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] Hereinafter, a scroll compressor according to the present disclosure will be described in more detail with reference to the accompanying drawings.

[0036] Figure 3 is a cross-sectional view illustrating a fixed scroll member and a movable scroll member in a scroll compressor according to an embodiment of the present disclosure, Figure 4 It's a picture. Figure 3 A cross-sectional view of a state in which the movable scroll member is orbiting, and Figure 5 It's a picture. Figure 3 A three-dimensional view of the fixed scroll component.

[0037] At the same time, for the convenience of description, reference will be made to Figure 1 describe Figures 3 to 5 Parts not shown in the figure.

[0038] Reference Figures 3 to 5 as well as Figure 1 According to an embodiment of the present disclosure, a scroll compressor may include: a housing 10; a driving source 20, which is disposed inside the housing 10 and is configured to generate a rotational force; a driving shaft 30, which receives the rotational force from the driving source 20 and is configured to rotate; an eccentric bushing 40, which is configured to convert the rotation of the driving shaft 30 into an eccentric rotation; a movable scroll member 50, which is configured to revolve through the eccentric bushing 40; and a fixed scroll member 600, which is engaged with the movable scroll member 50 and forms a compression chamber with the movable scroll member 50.

[0039] The housing 10 may include: a central housing 12, which is fastened to one side of the fixed scroll 600; a front housing 14, which is connected to the central housing 12 and forms a drive source accommodating space for accommodating the drive source 20; and a rear housing 16, which is connected to the other side of the fixed scroll 600 and has a discharge chamber, in which the refrigerant discharged from the compression chamber is accommodated.

[0040] The center housing 12 may include a center housing partition wall 12 a partitioning the drive source accommodating space and the scroll accommodating space, and a center housing side wall 12 b extending along an outer peripheral portion of the center housing partition wall 12 a .

[0041] Here, the central housing partition wall 12a may include: a bearing hole 12c, into which one end of the drive shaft 30 is inserted; a back pressure chamber 12d, which accommodates a fluid for pressurizing the movable scroll member 50 toward the fixed scroll member 600 and provides a space in which the eccentric bushing 40 can rotate; and a connecting hole (not shown) that connects the drive shaft accommodating space with the movable scroll member accommodating space to be described below.

[0042] The front shell 14 may include a front shell partition wall 14a and a front shell side wall 14b, the front shell partition wall 14a is opposite to the center shell partition wall 12a, the front shell side wall 14b extends along the outer peripheral portion of the front shell partition wall 14a and is fastened to the center shell side wall 12b, and the front shell partition wall 14b may include a bearing groove 14c, the other end of the drive shaft 30 is inserted into the bearing groove 14c, and the front shell side wall 14b may include an intake port (not shown) penetrating the front shell side wall 14b, so that the refrigerant is guided to the drive source accommodating space.

[0043] The driving source 20 may be formed as a motor having a stator 22 and a rotor 24. However, the driving source 20 is not limited thereto, and may be formed as a disc hub assembly that cooperates with an engine of a vehicle.

[0044] The driving shaft 30 may be coupled to the rotor 24 , and may penetrate the rotor 24 such that one end portion thereof is inserted into the bearing hole 12 c , and the other end portion thereof is inserted into the bearing groove 14 c .

[0045] Here, a first bearing 72 that rotatably supports the drive shaft 30 with respect to the bearing groove 12 c may be provided between an outer circumferential surface of one end portion of the drive shaft 30 and an inner circumferential surface of the bearing hole 12 c .

[0046] Furthermore, between the outer circumferential surface of the other end portion of the drive shaft 30 and the inner circumferential surface of the bearing groove 14 c , a second bearing 74 that rotatably supports the drive shaft 30 with respect to the bearing groove 14 c may be provided.

[0047] The eccentric bushing 40 may include: a recessed portion 42 into which one end of the drive shaft 30 is inserted; an eccentric portion 44, which protrudes toward the side opposite to the drive shaft 30 based on the recessed portion 42 and is eccentric relative to the drive shaft 30; and a balancing weight 46, which is arranged on the side opposite to the eccentric portion 44 based on the recessed portion 42 so as to produce an overall balance of the eccentric bushing 40.

[0048] Here, the drive shaft 30 and the eccentric bushing 40 may be formed such that a rotation gap is generated between the inner circumferential surface of the recessed portion 42 and the outer circumferential surface of the drive shaft 30 to prevent damage to the scroll due to compression of liquid refrigerant, for example, during initial driving.

[0049] That is, the drive shaft 30 and the eccentric bushing 40 may be swingably coupled to each other relative to the drive shaft 30 based on an eccentric position of the eccentric bushing 40 relative to the rotation axis of the drive shaft 30 .

[0050] The movable scroll member 50 can be arranged in a movable scroll member accommodating space formed by the central housing 12 and the fixed scroll member 600, and can include: a disc-shaped movable base plate 52; a movable scroll 54, which protrudes from one surface of the movable base plate 52; and an annular boss portion 56, which protrudes from the other surface of the movable base plate 22 and forms a groove, and the eccentric portion 44 is inserted into the groove.

[0051] Here, the movable scroll 54 may include a movable scroll inlet end 54a disposed on the outer peripheral portion of the movable base plate 52, a movable scroll outlet end 54c disposed at the center of the movable base plate 52, and a movable scroll spiral 54b extending in a spiral shape from the movable scroll inlet end 54a to the movable scroll outlet end 54c.

[0052] Meanwhile, a third bearing 76 that rotatably supports the eccentric portion 44 with respect to the boss portion 56 may be provided between the outer circumferential surface of the eccentric portion 44 and the inner circumferential surface of the boss portion 56 .

[0053] The fixed scroll member 600 may include: a fixed base plate 610, which is opposite to the movable base plate 52; a fixed scroll 620, which protrudes from the fixed base plate 610 and is engaged with the movable scroll 54; and a fixed side wall 630, which protrudes annularly from the outer peripheral portion of the fixed base plate 610, is fastened to the central housing 12, and forms a movable scroll member accommodating space.

[0054] Here, the fixed scroll 620 may include a fixed scroll inlet end 624 disposed on the outer peripheral portion of the fixed base plate 610, a fixed scroll outlet end 628 disposed at the center of the fixed base plate 610, and a fixed scroll spiral 626 extending in a spiral shape from the fixed scroll inlet end 624 to the fixed scroll outlet end 628.

[0055] In addition, the fixed scroll 620 may further include a fixed scroll extension 622 protruding from the fixed base plate 610 at a position radially spaced apart from the fixed scroll 620. That is, the fixed scroll 620 may further include the fixed scroll extension 622: the fixed scroll extension 622 is provided at a position extending from the fixed scroll inlet end 624 along the spiral shape to the opposite side of the fixed scroll spiral 626 and opposite to the movable scroll inlet end 54a.

[0056] The fixed scroll extension 622 may include a contact portion 622 a disposed radially outward relative to the center of the fixed scroll 600 and in contact with the fixed sidewall 630 , thereby maximally ensuring a rotation radius of the movable scroll 52 .

[0057] In addition, the fixed side wall 630 includes a recessed portion 632, which is formed to be recessed on the inner circumferential surface of the fixed side wall 630 so as to temporarily accommodate compressed refrigerant (refrigerant discharged from the communicating hole (not shown)), and the fixed scroll extension 622 may also include a non-contact portion 622b, which is arranged at a position opposite to the recessed portion 632 and is spaced apart from the fixed side wall 630.

[0058] In addition, a suction inlet 623 may be formed between the fixed scroll inlet end 624 and the fixed scroll extension 622 to guide the refrigerant in the recessed portion to the compression chamber, and a discharge port 612 may be formed on the fixed base plate 610 to discharge the refrigerant in the compression chamber.

[0059] Here, the fixed scroll extension 622 extends along the spiral shape in a manner corresponding to the movable scroll 54, and when the fixed scroll extension 622 extends to the fixed scroll inlet end 624, the suction inlet 623 must be formed in the shape of a hole that penetrates the fixed scroll 620. Therefore, in this case, since the size of the suction inlet 623 is limited in the height direction of the fixed scroll 620, the flow rate of the refrigerant introduced into the compression chamber may be limited.

[0060] In view of the above, in the present embodiment, the fixed scroll extension 622 may extend along a spiral shape and may extend to the suction inlet 623, so that the size of the suction inlet 623 may be maximized in the height direction of the fixed scroll 620 in the following manner: the suction inlet 623 is open toward the distal end surface (the surface in contact with one surface of the moving base plate 52) of the fixed scroll 620 and extends to the fixed base plate 610. That is, the fixed scroll extension 622 may be formed to be separated from the fixed scroll inlet end 624 by the suction inlet 623.

[0061] Here, in the case of the fixed scroll extension 622, as will be described below, although the roughness of the inner peripheral surface of the fixed scroll extension 622 that can contact the outer peripheral surface of the movable scroll inlet end 54a is formed to be smaller, the roughness of the outer peripheral surface of the fixed scroll extension 622 that cannot contact the movable scroll 54 can be formed to be greater than the roughness of the inner peripheral surface of the fixed scroll extension 622. Therefore, since there is no need to post-process the outer peripheral surface of the fixed scroll extension 622, the manufacturing cost can be saved.

[0062] Hereinafter, the operational effects of the scroll compressor according to the present embodiment will be described.

[0063] That is, when power is applied to the driving source 20, the driving shaft 30 can rotate together with the rotor 24 of the driving source 20, and the movable scroll 50 can revolve through the eccentric bushing 40. Therefore, a low-temperature and low-pressure refrigerant is introduced into the driving source accommodating space through the suction port (not shown), the refrigerant in the driving source accommodating space is introduced into the movable scroll accommodating space through the connecting hole (not shown), the refrigerant introduced into the movable scroll accommodating space is introduced into the compression chamber through the suction inlet 623, is compressed to be converted into a high-temperature and high-pressure refrigerant, and can then be discharged to the outside of the housing 10 through the discharge port 612 and the discharge chamber.

[0064] Here, the scroll compressor according to the present embodiment includes the fixed scroll extension 622 opposed to the movable scroll inlet end portion 54 a , and thus the turnover of the movable scroll 50 can be suppressed.

[0065] In more detail, the peripheral portion of one surface of the movable base plate 52 includes a first peripheral portion 52a disposed on one side of the movable scroll inlet end portion 54a, and a second peripheral portion 52b disposed on the side opposite to the first peripheral portion 52a based on the center of the movable base plate 52, and the first peripheral portion 52a can contact the fixed scroll extension 622, and the second peripheral portion 52b can contact at least one of the fixed scroll inlet end portion 624 and the fixed scroll spiral 626. That is, when the movable scroll member 50 is as Figure 3 When arranged as shown in the figure, the first outer peripheral portion 52a can contact the distal end surface of the fixed scroll extension 622. In addition, when the movable scroll member 50 is as shown in FIG. Figure 4 When arranged as shown in the figure, the second peripheral portion 52b can contact at least one of the distal surface of the fixed scroll inlet end 624 and the distal surface of the fixed scroll spiral 626. As described above, according to the position of the movable scroll member 50, the second peripheral portion 52b can be supported by the distal surface of the fixed scroll inlet end 624 and the distal surface of the fixed scroll spiral 626, and the first peripheral portion 52a can be supported by the distal surface of the fixed scroll extension 622, so that the turning of the movable scroll member 50 can be suppressed.

[0066] In addition, the outer peripheral surface of the movable scroll inlet end 54a can contact the inner peripheral surface of the fixed scroll extension 622, and the outer peripheral surface of the movable scroll spiral 54b can contact at least one of the inner peripheral surface of the fixed scroll inlet end 624 and the outer peripheral surface of the fixed scroll spiral 626. That is, when the movable scroll member 50 is as Figure 3 When the movable scroll member 50 is arranged as shown in the figure, the outer peripheral surface of the movable scroll inlet end 54a can contact the inner peripheral surface of the fixed scroll extension 622. Figure 4 When arranged as shown in the figure, the outer peripheral surface of the movable scroll spiral 54b can contact at least one of the inner peripheral surface of the fixed scroll inlet end 624 and the inner peripheral surface of the fixed scroll spiral 626. Therefore, according to the position of the movable scroll member 50, the outer peripheral surface of the movable scroll spiral 54b can be supported by the inner peripheral surface of the fixed scroll inlet end 624 and the inner peripheral surface of the fixed scroll spiral 626, and the outer peripheral surface of the movable scroll inlet end 54a can be supported by the inner peripheral surface of the fixed scroll member extension 622, so that the turning of the movable scroll member 50 can be further suppressed.

[0067] Therefore, the flow of the movable scroll member 50 in the radial and axial directions is prevented, thereby preventing damage and noise degradation caused by the collision between the fixed scroll member 600 and the movable scroll member 50, preventing deterioration of compression efficiency due to leakage in the compression chamber and the back pressure chamber 12d, and preventing damage to the first bearing 72, the second bearing 74, the third bearing 76, the eccentric bushing and the drive shaft 30, and deterioration of noise and vibration.

[0068] Meanwhile, in the present embodiment, the fixed scroll extension 622 is formed to have a Figure 5 The continuous plate shape shown in the figure is used to continuously and stably support the movable scroll inlet end 54a, but it is not limited to this.

[0069] That is to say, Figure 6 As shown in the figure, the fixed scroll extension 622 may include a through hole 622c that penetrates the fixed scroll extension 622. In addition, the through hole 622c may be formed in plurality, and the plurality of through holes 622c may be arranged along the circumferential direction of the fixed scroll extension 622. In this case, since the fixed scroll extension 622 continuously and stably supports the movable scroll inlet end 54a, the weight and manufacturing cost of the fixed scroll extension 622 may be saved. However, in such a case, since the through hole 622c must be formed by a cutting process after the fixed scroll extension 622 is formed to have a continuous plate shape, the processing cost and factory overhead may increase.

[0070] Considering the above facts, Figure 7As shown in the figure, the fixed scroll extension 622 may include a gap 622d, which is formed to be recessed from the distal end surface of the fixed scroll extension 622. In addition, the gap 622d can be formed in plurality, and the plurality of gaps 622d can be arranged along the circumferential direction of the fixed scroll extension 622. In this case, it is disadvantageous in terms of continuously and stably supporting the movable scroll inlet end 54a by the fixed scroll extension 622, however, the weight and manufacturing cost of the fixed scroll extension 622 are saved due to the suppression of processing costs and factory overhead, because when the portion for forming the gap 622d is formed in the mold for manufacturing the fixed scroll member 600, the fixed scroll extension 622 having the gap 622d can be formed without the need for an additional cutting process.

[0071] It is apparent that the fixed scroll extension 622 may include both the through hole 622c and the slit 622d.

[0072] At the same time, when at least one of the through hole 622c and the gap 622d is formed in the non-contact portion 622b opposite to the recessed portion 632, the refrigerant introduced into the recessed portion 632 can be introduced into the compression chamber through the through hole 622c and the gap 622d and the suction inlet 623, thereby increasing the suction amount of the refrigerant.

[0073] Here, in terms of the shape characteristics of the movable scroll 54 and the fixed scroll member 620, the refrigerant in the movable scroll member accommodating space is mainly introduced into the compression chamber through the suction inlet 623, and the suction inlet 623 can preferably be formed to be larger than the through hole 622c and the gap 622d.

Claims

1. A scroll compressor, comprising: a drive shaft configured to be rotatable by a drive source; a movable scroll member including a disk-shaped movable base plate and a movable scroll protruding from the movable base plate and configured to orbit through the drive shaft; as well as The fixed scroll member includes a fixed base plate opposite to the movable base plate, a fixed scroll protruding from the fixed base plate and engaging with the movable scroll, and a fixed scroll extension protruding from the fixed base plate at a position radially spaced apart from the fixed scroll.

2. The scroll compressor according to claim 1, in, The movable scroll includes a movable scroll inlet end portion provided on an outer peripheral portion of the movable base plate, and Wherein, the fixed scroll includes a fixed scroll extension portion opposite to the inlet end of the movable scroll.

3. The scroll compressor according to claim 2, in, The fixed scroll further includes a fixed scroll inlet end portion provided on an outer peripheral portion of the fixed base plate, a fixed scroll outlet end portion provided at a center of the fixed base plate, and a fixed scroll spiral extending in a spiral shape from the fixed scroll inlet end portion to the fixed scroll outlet end portion, and The fixed scroll extension is provided at a position extending from an inlet end of the fixed scroll along the spiral shape to an opposite side of the fixed scroll spiral.

4. The scroll compressor according to claim 3, in, The inner peripheral surface of the fixed scroll extension is formed to be contactable with the outer peripheral surface of the movable scroll inlet end portion.

5. The scroll compressor according to claim 4, in, An outer peripheral surface of the fixed scroll extension is formed to have a roughness greater than a roughness of an inner peripheral surface of the fixed scroll extension.

6. The scroll compressor according to claim 3, in, A distal end surface of the fixed scroll extension is formed to be contactable with the moving base plate.

7. The scroll compressor according to claim 6, in, The outer peripheral portion of the movable base plate includes a first outer peripheral portion provided on one side of the movable scroll inlet end portion, and a second outer peripheral portion provided on the side opposite to the first outer peripheral portion based on the center of the movable base plate, and The first peripheral portion may be in contact with the fixed scroll extension, and the second peripheral portion may be in contact with at least one of the fixed scroll inlet end and the fixed scroll spiral.

8. The scroll compressor according to claim 3, in, A suction inlet is formed between the fixed scroll inlet end and the fixed scroll extension.

9. The scroll compressor according to claim 8, in, The fixed scroll inlet end portion and the fixed scroll extension portion are separated from each other by the suction inlet.

10. The scroll compressor according to claim 8, in, The fixed scroll extension extends along the spiral shape to the suction inlet.

11. The scroll compressor according to claim 3, in, The fixed scroll member further includes a fixed side wall protruding from an outer peripheral portion of the fixed base plate, and The fixed scroll extension portion includes a contact portion contacting the fixed sidewall and a non-contact portion spaced apart from the fixed sidewall.

12. The scroll compressor according to claim 11, in, The fixed side wall includes a recessed portion formed to be recessed on an inner peripheral surface of the fixed side wall at a position opposite to the non-contact portion.

13. The scroll compressor according to claim 12, in, The fixed wrap extension includes at least one of a through hole penetrating the fixed wrap extension and a slit formed to be recessed from a distal end surface of the fixed wrap extension.

14. The scroll compressor according to claim 13, in, The through hole and the slit are formed in the non-contact portion.

15. The scroll compressor according to claim 14, in, A suction inlet is formed between the fixed scroll inlet end and the fixed scroll extension, and The suction inlet is formed to be larger than the through hole and the gap.

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