Scroll compressor

Abstract

The utility model discloses a scroll compressor (100). The scroll compressor (100) comprises a fixed scroll piece (50) and a movable scroll piece (60), the orbiting scroll (60) is wound while the first orbiting scroll outer arc (64) is in contact with the second fixed scroll inner arc (55), and then, when the first orbiting scroll outer arc (64) is not in contact with a connection point between the second fixed scroll inner arc (55) and the third fixed scroll inner arc (56), the first compression chamber (30) is in communication with the discharge port (50a).

Description

Technical Field

[0001] The utility model relates to a scroll compressor. Background Art

[0002] A scroll compressor is known, which includes: a sealed container; a suction pipe, in which gas refrigerant sucked from the outside flows into the scroll compressor; and a scroll compression element, which includes a fixed scroll member and a movable scroll member, the movable scroll member being configured to engage with the fixed scroll member to form a compression chamber between the fixed scroll member and the movable scroll member, as disclosed in Japanese Laid-Open Publication No. JP2007-315172A, hereinafter referred to as PTL1.

[0003] In PTL 1, at the winding starting portion of the spiral scroll of the fixed scroll member and the movable scroll member, a first outer arc in which the head of the spiral scroll is smoothly connected to the winding starting point of the outer wall involute and a second inner arc in which the head of the spiral scroll is smoothly in contact with the winding starting point of the inner wall involute are connected.

[0004] Furthermore, the first outer arc and the second inner arc of the fixed scroll are connected by a third inner arc that is not smoothly connected to the corresponding arcs.

[0005] In order to discharge the compressed gas refrigerant from the discharge port, when the compression chamber communicates with the discharge port, the head of the movable scroll moves along the second inner arc of the fixed scroll toward the third inner arc of the fixed scroll.

[0006] However, since a narrow gap is formed between the head portion of the movable scroll and the second inner arc of the fixed scroll, there is a possibility that the compressed gas refrigerant flows back through the gap and thus the compression ratio of the gas refrigerant decreases.

[0007] Therefore, a scroll compressor has been developed that can prevent the compressed gas refrigerant from flowing back when the compression chamber is in communication with the discharge port and can improve the compression ratio of the gas refrigerant.

[0008] Reference List

[0009] Patent Literature

[0010] PTL1: Japanese Unexamined Patent Application Publication No. 2007-315172A Utility Model Content

[0011] An object of the present invention is to provide a scroll compressor that can prevent backflow of compressed gas and improve the compression ratio of gas refrigerant when a compression chamber is communicated with a discharge port.

[0012] In order to achieve the above objectives, an embodiment of the present invention provides a scroll compressor, which includes: a sealed container; a motor element, which is accommodated in the sealed container; a scroll compression element, which is accommodated in the sealed container and is configured to be driven by the shaft of the motor element; a suction pipe, which is installed through the sealed container, and the gas refrigerant sucked from the outside flows into the scroll compression element in the suction pipe, wherein the scroll compression element includes a fixed scroll member and a movable scroll member, in which the spiral The spiral-shaped fixed scroll scroll is erected on the fixed scroll end plate, and in the movable scroll, the spiral-shaped movable scroll scroll is erected on the movable scroll end plate, and the movable scroll is configured to engage with the fixed scroll scroll to form a first compression chamber through the inner wall of the fixed scroll scroll and the outer wall of the movable scroll scroll, and a second compression chamber through the outer wall of the fixed scroll scroll and the inner wall of the movable scroll scroll, the movable scroll is configured to orbit relative to the fixed scroll, and a discharge port is formed in the fixed scroll, which discharges the gas refrigerant compressed in the scroll compression element.

[0013] In addition, in an embodiment of the present invention, the fixed scroll winding starting part of the fixed scroll vortex includes: a first fixed scroll outer arc, which smoothly connects the tip of the fixed scroll vortex to the winding starting point of the involute on the outer wall of the fixed scroll vortex; a second fixed scroll inner arc, which smoothly contacts the winding starting point of the involute on the inner wall of the fixed scroll vortex; and a third fixed scroll inner arc, which is not smoothly connected to the first fixed scroll outer arc and the second fixed scroll inner arc, and the third fixed scroll inner arc is formed to connect the first fixed scroll outer arc and the second fixed scroll inner arc. The orbiting scroll wrap's orbiting start portion includes a first orbiting scroll outer arc that smoothly connects the tip of the orbiting scroll wrap to a wrap-start point of the involute on the outer wall of the orbiting scroll wrap, and a second orbiting scroll inner arc that smoothly contacts the wrap-start point of the involute on the inner wall of the orbiting scroll wrap.

[0014] In addition, the movable scroll member orbits while the outer arc of the first movable scroll member is in contact with the inner arc of the second fixed scroll member, and then, when the outer arc of the first movable scroll member is not in contact with the connection point between the inner arc of the second fixed scroll member and the inner arc of the third fixed scroll member, the first compression chamber is connected to the discharge port.

[0015] The compression ratio obtained by dividing the discharge pressure of the gas refrigerant by the suction pressure depends on the shapes of the fixed scroll wrap and the orbiting scroll wrap.

[0016] According to an embodiment of the present invention, the movable scroll roll is configured to engage with the fixed scroll roll to form a first compression chamber through the inner wall of the fixed scroll roll and the outer wall of the movable scroll roll, and a second compression chamber through the outer wall of the fixed scroll roll and the inner wall of the movable scroll roll.

[0017] Therefore, before a period in which the gas refrigerant is discharged from the discharge port, the compression ratio may be increased due to volume changes of the first and second compression chambers in response to the movement of the movable scroll.

[0018] In addition, the movable scroll member orbits while the outer arc of the first movable scroll member is in contact with the inner arc of the second fixed scroll member, and then, when the outer arc of the first movable scroll member is not in contact with the connection point between the inner arc of the second fixed scroll member and the inner arc of the third fixed scroll member, the first compression chamber is connected to the discharge port.

[0019] Therefore, when the first compression chamber is connected to the discharge port, the compressed gas refrigerant can be prevented from flowing back between the first movable scroll outer arc and the second fixed scroll inner arc. In addition, since the compressed gas refrigerant is prevented from flowing back, the compression ratio of the gas refrigerant can be improved.

[0020] Therefore, according to the embodiment of the scroll compressor of the present invention, when the first compression chamber is communicated with the discharge port, the compressed gas refrigerant can be prevented from flowing back, and the compression ratio of the gas refrigerant can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The principles of the present invention and the advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a longitudinal sectional view illustrating a schematic configuration of a scroll compressor 100 according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 An explanatory diagram of the fixed scroll member 50 and the movable scroll member 60;

[0024] Figures 3A to 3C yes Figure 2 The fixed scroll winding start portion 53 and Figure 2 An enlarged view of the orbiting scroll member winding start portion 63;

[0025] Figures 4A to 4L is a schematic diagram illustrating the relative movement of the first compression chamber 30 and the fixed scroll wrap and the orbiting scroll wrap 62 within one cycle; and

[0026] Figures 5A to 5L1 is a schematic diagram illustrating the relative movement of the second compression chamber 40 and the fixed scroll wrap and the orbiting scroll wrap 62 within one cycle. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0028] Figure 1 1 is a schematic longitudinal cross-sectional view of a scroll compressor 100 according to an embodiment. Scroll compressor 100 is a fluid machine configured to compress and discharge a fluid (i.e., a gas refrigerant) and may be a component of a refrigeration cycle apparatus. Scroll compressor 100 according to an embodiment is a vertically mounted shell-type compressor.

[0029] like Figure 1 As shown, the scroll compressor 100 includes: a sealed container 1; a suction pipe 5, which is installed through the top surface of the sealed container 1 and is formed as a hollow cylindrical tube; a discharge pipe 6, which discharges the gas refrigerant to the outside; a scroll compression element 3, which is configured to compress the low-pressure gas refrigerant in the first compression chamber 30 and the second compression chamber 40; a motor element 2, which is configured to drive the scroll compression element 3 accommodated in the sealed container 1; and a shaft 4, which includes a main part 4a and an eccentric part 4b that is eccentric relative to the main part 4a.

[0030] The upper portion of the scroll compression element 3 is supported by the intermediate housing of the sealed container 1. The scroll compression element 3 is fixed to the intermediate housing 1a of the sealed container 1 by shrink fitting or other methods. A subframe 7 is provided below the motor element 2. The subframe 7 is fixed to the inner peripheral surface of the sealed container 1.

[0031] A suction pipe 5 configured to draw low-pressure gas refrigerant from the outside into the scroll compression element 3 is connected to the side surface of the sealed container 1. A discharge pipe 6 configured to discharge high-pressure gas refrigerant to the outside of the scroll compressor 100 is connected to the side surface of the sealed container 1.

[0032] The scroll type compression element 3 is housed in the sealed container 1 and is configured to compress the gas refrigerant sucked from the suction pipe 5 by the rotation of the shaft 4 driven by the motor element 2. Figure 1 As shown, the scroll compression element 3 includes a fixed scroll 50 and a movable scroll 60 .

[0033] Furthermore, a discharge port 50 a configured to discharge compressed gas refrigerant is formed in a central portion of the fixed scroll 50 in the scroll-type compression element 3 .

[0034] like Figure 1 and Figure 2 As shown, the fixed scroll 50 is fixed to the intermediate housing 1a at the lower end portion of the fixed scroll 50. The fixed scroll 50 includes a fixed scroll end plate 51 and a spiral fixed scroll wrap 52 standing on the fixed scroll end plate 51. The fixed scroll wrap 52 has an involute shape to form a spiral body, and the fixed scroll wrap 52 stands on one surface of the fixed scroll end plate 51.

[0035] like Figure 3A and Figure 3B As shown, the fixed scroll winding starting portion 53 of the fixed scroll vortex 52 includes: a first fixed scroll outer arc 54, which smoothly connects the tip of the fixed scroll vortex 52 to the winding starting point of the involute on the outer wall of the fixed scroll vortex 52; a second fixed scroll inner arc 55, which smoothly contacts the winding starting point of the involute on the inner wall of the fixed scroll vortex 52; and a third fixed scroll inner arc 56, which is not smoothly connected to the first fixed scroll outer arc 54 and the second fixed scroll inner arc 55, and the third fixed scroll inner arc 56 is formed to connect the first fixed scroll outer arc 54 with the second fixed scroll inner arc 55.

[0036] like Figure 1 and Figure 2 As shown, the movable scroll 60 is configured to orbit without rotating relative to the fixed scroll 50. The movable scroll 60 includes an movable scroll end plate 61 and a spiral movable scroll wrap 62 standing on the movable scroll end plate 61. The movable scroll wrap 62 has an involute shape to form a spiral body, and the movable scroll wrap 62 stands on one surface of the movable scroll end plate 61.

[0037] like Figure 3A and Figure 3C As shown, the movable scroll winding starting portion 63 of the movable scroll vortex 62 includes: a first movable scroll outer arc 64, which smoothly connects the tip of the movable scroll vortex 62 to the winding starting point of the involute on the outer wall of the movable scroll vortex 62; and a second movable scroll inner arc 65, which smoothly contacts the winding starting point of the involute on the inner wall of the movable scroll vortex 62.

[0038] Furthermore, the orbiting scroll 60 is configured to orbit while the first orbiting scroll outer arc 64 is in contact with the second fixed scroll inner arc 55. Therefore, when the radius of curvature of the second fixed scroll inner arc 55 is set to "R2F," the radius of curvature of the first orbiting scroll outer arc 64 is set to "R1O," and the eccentric radius of the eccentric portion 4b of the shaft 4 is set to "ER," the following formula is satisfied between the second fixed scroll inner arc 55, the first orbiting scroll outer arc 64, and the eccentric portion 4b of the shaft 4.

[0039] R2F=R1O+ER

[0040] That is, the curvature radius R2F of the inner arc 55 of the second fixed scroll is equal to the curvature radius R10 of the outer arc 64 of the first movable scroll plus the eccentric radius ER of the eccentric portion 4 b of the shaft 4 .

[0041] Furthermore, the movable scroll 60 is configured to orbit while the second movable scroll inner arc 65 is in contact with the first fixed scroll outer arc 54. Therefore, when the radius of curvature of the first fixed scroll outer arc 54 is set to "R1F", the radius of curvature of the second movable scroll inner arc 65 is set to "R2O", and the eccentric radius of the eccentric portion 4b of the shaft 4 is set to "ER", the following formula is satisfied between the first fixed scroll outer arc 54, the second movable scroll inner arc 65, and the eccentric portion 4b of the shaft 4.

[0042] R2O=R1F+ER

[0043] That is, the curvature radius R20 of the inner arc 65 of the second movable scroll is equal to the curvature radius R1F of the outer arc 54 of the first fixed scroll plus the eccentric radius ER of the eccentric portion 4 b of the shaft 4 .

[0044] In addition, the curvature radius R10 of the first movable scroll outer arc 64 and the curvature radius R1F of the first fixed scroll outer arc 54 are preferably 1 mm to 5 mm.

[0045] An orbiting bearing 66 is formed in a substantially central portion of the lower surface of the movable scroll end plate 61. The orbiting bearing 66 is formed into a bottomed cylindrical shape. An eccentric portion 4b, which is eccentric relative to the main portion 4a of the shaft 4, is mounted on the upper end portion of the main portion 4a of the shaft 4. The eccentric portion 4b is inserted into the orbiting bearing 66 to cause the movable scroll 60 to orbit.

[0046] like Figure 2 As shown, the movable scroll wrap 62 is configured to engage with the fixed scroll wrap 52 to form a first compression chamber 30 by the inner wall of the fixed scroll wrap 52 and the outer wall of the movable scroll wrap 62 and a second compression chamber 40 by the outer wall of the fixed scroll wrap 52 and the inner wall of the movable scroll wrap 62.

[0047] like Figure 1 As shown, the motor element 2 includes an electric motor stator 2a fixed to the inner peripheral surface of the sealed container 1 by shrink fitting or other methods, an electric motor rotor 2b rotatably accommodated on the inner peripheral side of the electric motor stator 2a, and a main portion 4a of the shaft 4 fixed to the electric motor rotor 2b. The electric motor rotor 2b is configured to rotate when power is supplied to the electric motor stator 2a and transmit the driving force to the movable scroll member 60 through the shaft 4.

[0048] Next, a description will be given of the relationship between the movement of the movable scroll 60 relative to the fixed scroll 50 and the change in shape of the first and second compression chambers 30 and 40 when the scroll compressor 100 is operated.

[0049] Figures 4A to 4L The diagram illustrates the relative motion of the first compression chamber 30 and the fixed scroll wrap 52 and the orbiting scroll wrap 62 within one cycle, when the time at which the first orbiting scroll outer arc 64 first contacts the second fixed scroll inner arc 55 in the first compression chamber 30 is defined as a first rotation angle A1 of the orbiting scroll 60 being 0 degrees. In this embodiment, when the first rotation angle A1 exceeds a first predetermined angle A11, the first orbiting scroll outer arc 64 does not contact the second fixed scroll inner arc 55 in the first compression chamber 30.

[0050] First, if Figure 4A As shown, the first movable scroll outer arc 64 contacts the second fixed scroll inner arc 55. Since the second fixed scroll inner arc 55 is smoothly formed to contact the winding starting point of the involute on the inner wall of the fixed scroll vortex 52, the first movable scroll outer arc 64 contacts the second fixed scroll inner arc 55 smoothly.

[0051] Secondly, if Figures 4B to 4D As shown, the movable scroll 60 orbits while the first movable scroll outer arc 64 contacts the second fixed scroll inner arc 55 , and then the first movable scroll outer arc 64 contacts the connection point between the second fixed scroll inner arc 55 and the third fixed scroll inner arc 56 .

[0052] Third, if Figure 4E As shown, after the connection point between the second and third fixed scroll inner arcs 55 and 56 contacts the first movable scroll outer arc 64 , the first compression chamber 30 communicates with the discharge port 50 a .

[0053] That is, the first compression chamber 30 communicates with the discharge port 50a when the first orbiting scroll outer arc 64 is not in contact with the connection point between the second fixed scroll inner arc 55 and the third fixed scroll inner arc 56. In other words, when the first rotation angle A1 exceeds the first predetermined angle A11, the first compression chamber 30 communicates with the discharge port 50a while the first rotation angle A1 exceeds the first predetermined angle A11.

[0054] In addition, in this embodiment, as Figure 4D and Figure 4E It can be seen that the first compression chamber 30 communicates with the discharge port 50 a when the first rotation angle A1 exceeds a first predetermined angle A11 between 90 degrees and 120 degrees.

[0055] Finally, the movable scroll 60 continues to orbit, and the compressed gas refrigerant is discharged from the discharge port 50 a.

[0056] Therefore, when the first compression chamber 30 is connected to the discharge port 50a, the compressed gas refrigerant can be prevented from flowing back between the first movable scroll outer arc 64 and the second fixed scroll inner arc 55. In addition, since the compressed gas refrigerant is prevented from flowing back, the compression ratio of the gas refrigerant can be improved.

[0057] also, Figures 5A to 5L The diagram illustrates the relative motion of the second compression chamber 40 and the fixed scroll wrap 52 and the orbiting scroll wrap 62 within one cycle, when the time at which the second orbiting scroll inner arc 65 first contacts the first fixed scroll outer arc 54 in the second compression chamber 40 is defined as the second rotation angle A2 of the orbiting scroll 60 being 0 degrees. In this embodiment, when the second rotation angle A2 exceeds the second predetermined angle A21, the second orbiting scroll inner arc 65 does not contact the first fixed scroll outer arc 54 in the second compression chamber 40.

[0058] First, if Figure 5A As shown, the second orbiting scroll inner arc 65 contacts the first fixed scroll outer arc 54. Since the second orbiting scroll inner arc 65 is smoothly formed to contact the winding starting point of the involute on the inner wall of the orbiting scroll wrap 62, the second orbiting scroll inner arc 65 contacts the first fixed scroll outer arc 54 smoothly.

[0059] Secondly, if Figures 5B to 5D As shown, the orbiting scroll 60 orbits while the second orbiting scroll inner arc 65 is in contact with the first fixed scroll outer arc 54 .

[0060] Third, if Figure 5E As shown, after the first fixed scroll outer arc 54 contacts the second orbiting scroll inner arc 65 , the second compression chamber 40 communicates with the discharge port 50 a .

[0061] That is, when the first fixed scroll outer arc 54 contacts the second orbiting scroll inner arc 65, the second compression chamber 40 communicates with the discharge port 50a. In other words, when the second rotation angle A2 exceeds the second predetermined angle A21, the second compression chamber 40 communicates with the discharge port 50a during the period when the second rotation angle A2 exceeds the second predetermined angle A21.

[0062] In addition, in this embodiment, as Figure 5D and Figure 5E It can be seen that when the second rotation angle A2 exceeds a second predetermined angle A21 between 90 degrees and 120 degrees, the second compression chamber 40 communicates with the discharge port 50a.

[0063] Finally, the movable scroll 60 continues to orbit, and the compressed gas refrigerant is discharged from the discharge port 50 a.

[0064] Therefore, when the second compression chamber 40 is connected to the discharge port 50a, the compressed gas refrigerant can be prevented from flowing back between the second movable scroll inner arc 65 and the first fixed scroll outer arc 54. In addition, since the compressed gas refrigerant is prevented from flowing back, the compression ratio of the gas refrigerant can be improved.

[0065] Therefore, according to the embodiment of the scroll compressor 100 , when the first compression chamber 30 and the second compression chamber 40 communicate with the discharge port 50 a , backflow of the compressed gas refrigerant may be prevented, and a compression ratio of the gas refrigerant may be improved.

[0066] In addition, in this embodiment, the first predetermined angle A11 is between 90 degrees and 120 degrees ( Figure 4D 、 Figure 4E ), but not limited thereto. The maximum angle of the first predetermined angle A11 is 180 degrees. In addition, the second predetermined angle A21 is between 90 degrees and 120 degrees ( Figure 5D 、 Figure 5E The maximum angle of the second predetermined angle A21 is 180 degrees.

[0067] Although specific embodiments of the present invention have been disclosed, described, and illustrated in the accompanying drawings, this is only for the purpose of better understanding the principles of the present invention and is not intended to limit the scope and spirit of the teachings of the present invention. Without departing from the scope of the present invention as determined by the claims, adjustments and modifications to various structures, such as design or materials, of the present invention are possible and obvious to those skilled in the art.

[0068] Reference numerals:

[0069] 100: Scroll compressor

[0070] 1. Sealed container

[0071] 1a: Intermediate housing

[0072] 2: Motor components

[0073] 2a: Electric motor stator

[0074] 2b: Electric motor rotor

[0075] 3: Scroll compression element

[0076] 4: Axis

[0077] 4a: Main part

[0078] 4b: Eccentric part

[0079] 5: Suction pipe

[0080] 6: Discharge pipe

[0081] 7: Subframe

[0082] 30: First compression chamber

[0083] 40: Second compression chamber

[0084] 50: Fixed scroll

[0085] 50a: discharge port

[0086] 51: Fixed scroll end plate

[0087] 52: Fixed scroll scroll

[0088] 53: The starting part of the fixed scroll winding

[0089] 54: Outer arc of the first fixed scroll

[0090] 55: Inner arc of the second fixed scroll

[0091] 56: Inner arc of the third fixed scroll

[0092] 60: Moving scroll

[0093] 61: End plate of movable scroll

[0094] 62: Orbiting scroll scroll

[0095] 63: The beginning of the winding of the movable scroll

[0096] 64: Outer arc of the first movable scroll

[0097] 65: Inner arc of the second movable scroll

[0098] 66: Orbiting bearing

[0099] RIF: radius of curvature of the outer arc 54 of the first fixed scroll

[0100] R2F: The curvature radius of the inner arc 55 of the second fixed scroll

[0101] R10: radius of curvature of the outer arc 64 of the first movable scroll

[0102] R2O: radius of curvature of the inner arc 65 of the second movable scroll

[0103] ER: Eccentric radius of the eccentric portion 4b of the shaft 4

[0104] A1: First rotation angle

[0105] A2: Second rotation angle

Claims

1. A scroll compressor (100), comprising: Sealed container (1); a motor element (2), the motor element (2) being accommodated in the sealed container (1); a scroll compression element (3) housed in the sealed container (1) and configured to be driven by the shaft (4) of the motor element (2); A suction pipe (5) is installed through the sealed container (1), and the gas refrigerant sucked from the outside flows into the scroll compression element (3) in the suction pipe (5). The scroll compression element (3) comprises: a fixed scroll (50), wherein a spiral fixed scroll vortex (52) is erected on a fixed scroll end plate (51); and a movable scroll (60), wherein a spiral movable scroll vortex (62) is erected on a movable scroll end plate (61), and wherein the movable scroll vortex (62) is configured to engage with the fixed scroll vortex (52) so as to be compressed by the inner wall of the fixed scroll vortex (52) and the inner wall of the fixed scroll vortex (52). The outer wall of the movable scroll volute (62) forms a first compression chamber (30), and the outer wall of the fixed scroll volute (52) and the inner wall of the movable scroll volute (62) form a second compression chamber (40), the movable scroll (60) is configured to orbit relative to the fixed scroll (50), and a discharge port (50a) is formed in the fixed scroll (50), the discharge port (50a) being used to discharge the gas refrigerant compressed in the scroll compression element (3), wherein the fixed scroll winding start portion (53) of the fixed scroll vortex (52) comprises: a first fixed scroll outer arc (54), the first fixed scroll outer arc (54) smoothly connecting the tip of the fixed scroll vortex (52) to the winding start point of the involute on the outer wall of the fixed scroll vortex (52); a second fixed scroll inner arc (55), the second fixed scroll inner arc (55) smoothly contacting the winding start point of the involute on the inner wall of the fixed scroll vortex (52); and a third fixed scroll inner arc (56), the third fixed scroll inner arc (56) not smoothly connected to the first fixed scroll outer arc (54) and the second fixed scroll inner arc (55), and the third fixed scroll inner arc (56) is formed to connect the first fixed scroll outer arc (54) and the second fixed scroll inner arc (55), wherein the movable scroll wrap (62) comprises a first movable scroll outer arc (64) which smoothly connects the tip of the movable scroll wrap (62) to the wrapping start point of the involute on the outer wall of the movable scroll wrap (62); and a second movable scroll inner arc (65) which smoothly contacts the wrapping start point of the involute on the inner wall of the movable scroll wrap (62), and wherein the movable scroll (60) orbits while the first movable scroll outer arc (64) is in contact with the second fixed scroll inner arc (55), and then, when the first movable scroll outer arc (64) is not in contact with the connection point between the second fixed scroll inner arc (55) and the third fixed scroll inner arc (56), the first compression chamber (30) is connected to the discharge port (50a).

2. The scroll compressor (100) according to claim 1, wherein: The movable scroll (60) orbits while the second movable scroll inner arc (65) is in contact with the first fixed scroll outer arc (54), and then, when the first fixed scroll outer arc (54) is in contact with the second movable scroll inner arc (65), the second compression chamber (40) is communicated with the discharge port (50a).

3. The scroll compressor (100) according to claim 1, wherein: When the time when the outer arc (64) of the first movable scroll member first contacts the inner arc (55) of the second fixed scroll member in the first compression chamber (30) is limited to the first rotation angle (A1) of the movable scroll member (60) being 0 degrees and when the outer arc (64) of the first movable scroll member does not contact the inner arc (55) of the second fixed scroll member in the first compression chamber (30) when the first rotation angle (A1) exceeds the first predetermined angle (A11), the first compression chamber (30) is connected to the discharge port (50a) during the period when the first rotation angle (A1) exceeds the first predetermined angle (A11).

4. The scroll compressor (100) according to claim 3, wherein: The maximum angle of the first predetermined angle (A11) is 180 degrees.

5. The scroll compressor (100) according to claim 2, wherein: When the time when the inner arc (65) of the second movable scroll member first contacts the outer arc (54) of the first fixed scroll member in the second compression chamber (40) is limited to the second rotation angle (A2) of the movable scroll member (60) being 0 degrees and when the inner arc (65) of the second movable scroll member does not contact the outer arc (54) of the first fixed scroll member in the second compression chamber (40) when the second rotation angle (A2) exceeds the second predetermined angle (A21), the second compression chamber (40) is connected to the discharge port (50a) during the period when the second rotation angle (A2) exceeds the second predetermined angle (A21).

6. The scroll compressor (100) according to claim 5, wherein: The maximum angle of the second predetermined angle (A21) is 180 degrees.

7. The scroll compressor (100) according to claim 1, wherein: The curvature radius (R2F) of the inner arc (55) of the second fixed scroll is equal to the curvature radius (R1O) of the outer arc (64) of the first movable scroll plus the eccentric radius (ER) of the eccentric portion (4b) of the shaft (4).

8. The scroll compressor (100) according to claim 1, wherein: The curvature radius (R2O) of the inner arc (65) of the second movable scroll is equal to the curvature radius (R1F) of the outer arc (54) of the first fixed scroll plus the eccentric radius (ER) of the eccentric portion (4b) of the shaft (4).

9. The scroll compressor (100) according to claim 1, wherein: The curvature radius (R1O) of the outer arc (64) of the first movable scroll member and the curvature radius of the outer arc (54) of the first fixed scroll member are 1 mm to 5 mm.

10. The scroll compressor (100) according to claim 1, wherein: The inner arc (56) of the third fixed scroll member forms a portion of the discharge port (50a).

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