Scroll Compressor

Abstract

The present invention discloses a scroll compressor 100 including a fixed scroll 50 and an orbiting scroll 60. When the first outer circular arc 64 of the orbiting scroll is in contact with the second inner circular arc 55 of the fixed scroll, the orbiting scroll 60 orbits, and thereafter, when the first outer circular arc 64 of the orbiting scroll is no longer in contact with the connection point between the second inner circular arc 55 of the fixed scroll and the third inner circular arc 56 of the fixed scroll, the first compression chamber 30 communicates with the discharge hole 50a.

Description

[Technical Field]

[0001] The present invention relates to a scroll compressor. [Background technology]

[0002] As disclosed in Patent Document 1, a scroll compressor is known that includes a suction pipe that allows refrigerant gas drawn in from the outside to flow into the scroll compressor, and a scroll compression element that includes a fixed scroll and an oscillating scroll, where the oscillating scroll is configured to mesh with the fixed scroll to form a compression chamber between the fixed scroll and the oscillating scroll.

[0003] In Patent Document 1, at the start of winding of each spiral wrap of the fixed scroll and the orbiting scroll, a first outer circular arc where the head of the spiral wrap smoothly connects to the start of winding of the outer wall involute curve connects to a second inner circular arc where the head of the spiral wrap smoothly touches the start of winding of the inner wall involute curve.

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

[0005] When the compression chamber is connected to the discharge hole, the head of the orbiting scroll moves along the second inner arc of the fixed scroll toward the third inner arc of the fixed scroll to discharge the compressed refrigerant gas from the discharge hole.

[0006] However, a narrow gap is formed between the head of the orbiting scroll and the second inner arc of the fixed scroll, which may allow the compressed refrigerant gas to flow back through this gap, thereby reducing the compression rate of the refrigerant gas.

[0007] Therefore, there is a need to develop a scroll compressor that can prevent backflow of compressed refrigerant gas when the compression chamber is in communication with the discharge hole and can increase the compression rate of the refrigerant gas. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2007-315172 A Summary of the Invention [Means for solving the problem]

[0009] An object of the present invention is to provide a scroll compressor that can prevent backflow of compressed gas when the compression chamber is in communication with the discharge hole and can increase the compression rate of refrigerant gas.

[0010] To achieve the above object, one embodiment of the present invention provides a scroll compressor including a sealed container, an electric element housed in the sealed container, a scroll compression element housed in the sealed container and configured to be driven by the crankshaft of the electric element, and a suction pipe extending through the sealed container to allow refrigerant gas drawn in from outside to flow into the scroll compression element. The scroll compression element includes a fixed scroll and an orbiting scroll, with a spiral wrap of the fixed scroll extending from an end plate of the fixed scroll, and a spiral wrap of the orbiting scroll extending from an end plate of the orbiting scroll. The inner wall of the wrap of the fixed scroll and the outer wall of the wrap of the orbiting scroll form a first compression chamber, and the wrap of the orbiting scroll is configured to mesh with the wrap of the fixed scroll to form a second compression chamber with the outer wall of the wrap of the fixed scroll and the inner wall of the wrap of the orbiting scroll. The orbiting scroll is configured to oscillate relative to the fixed scroll. A discharge hole is formed in the fixed scroll for discharging refrigerant gas compressed in the scroll compression element.

[0011] Furthermore, in this embodiment of the present invention, the fixed scroll wrap start portion includes a first outer circular arc of the fixed scroll that smoothly connects the tip of the fixed scroll wrap to the start point of the involute curve on the outer wall of the fixed scroll wrap, a second inner circular arc of the fixed scroll that smoothly touches the start point of the involute curve on the inner wall of the fixed scroll wrap, and a third inner circular arc of the fixed scroll that is not smoothly connected to the first outer circular arc of the fixed scroll and the second inner circular arc of the fixed scroll, but is formed to connect the first outer circular arc of the fixed scroll and the second inner circular arc of the fixed scroll. The orbiting scroll wrap start portion includes a first outer circular arc of the orbiting scroll that smoothly connects the tip of the orbiting scroll wrap to the start point of the involute curve on the outer wall of the orbiting scroll wrap, and a second inner circular arc of the orbiting scroll that smoothly touches the start point of the involute curve on the inner wall of the orbiting scroll wrap.

[0012] Furthermore, when the first outer arc of the orbiting scroll is in contact with the second inner arc of the fixed scroll, the orbiting scroll orbits, and then when the first outer arc of the orbiting scroll is no longer in contact with the connection point between the second inner arc of the fixed scroll and the third inner arc of the fixed scroll, the first compression chamber is connected to the discharge hole.

[0013] The compression ratio, which is obtained by dividing the discharge pressure by the suction pressure of the refrigerant gas, depends on the respective shapes of the fixed scroll wrap and the orbiting scroll wrap.

[0014] According to this embodiment of the present invention, the inner wall of the wrap of the fixed scroll and the outer wall of the wrap of the oscillating scroll form a first compression chamber, and the outer wall of the wrap of the fixed scroll and the inner wall of the wrap of the oscillating scroll form a second compression chamber, so that the wrap of the oscillating scroll is configured to mesh with the wrap of the fixed scroll.

[0015] Therefore, before the refrigerant gas is discharged from the discharge hole, the compression ratio can increase due to the change in volume of the first compression chamber and the second compression chamber corresponding to the movement of the orbiting scroll.

[0016] Furthermore, when the first outer arc of the orbiting scroll is in contact with the second inner arc of the fixed scroll, the orbiting scroll orbits, and then when the first outer arc of the orbiting scroll is no longer in contact with the connection point between the second inner arc of the fixed scroll and the third inner arc of the fixed scroll, the first compression chamber is connected to the discharge hole.

[0017] Therefore, when the first compression chamber is connected to the discharge hole, backflow of compressed refrigerant gas is prevented between the first outer circular arc of the orbiting scroll and the second inner circular arc of the fixed scroll, and further, since backflow of compressed refrigerant gas is prevented, the compression rate of the refrigerant gas can be improved.

[0018] Therefore, according to this embodiment of the scroll compressor of the present invention, when the first compression chamber communicates with the discharge hole, it is possible to prevent backflow of compressed refrigerant gas and improve the compression rate of the refrigerant gas.

[0019] The principles of the present invention and its advantages will become apparent from the following detailed description taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a longitudinal cross-sectional view showing the configuration of a scroll compressor 100 according to an embodiment of the present invention. [Figure 2] 2 is an explanatory diagram of a fixed scroll 50 and a swing scroll 60 of FIG. 1. [Figure 3A] 3 is an enlarged view of a fixed scroll winding start portion 53 of FIG. 2 and a swing scroll winding start portion 63 of FIG. 2. [Figure 3B] 3 is an enlarged view of a winding start portion 53 of the fixed scroll in FIG. 2. FIG. [Figure 3C] 3 is an enlarged view of a winding start portion 63 of the orbiting scroll in FIG. 2. FIG. [Figure 4A]10 is a diagram showing one state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4B] 10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4C] 10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4D] 10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4E] 10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4F] 10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4G] 10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4H] 10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4I] 10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4J] 10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4K] 10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 4L]10 is a diagram showing another state during one cycle of the relative movement between the first compression chamber 30 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5A] 10 is a diagram showing a state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5B] 10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5C] 10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5D] 10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5E] 10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5F] 10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5G] 10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5H] 10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5I] 10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5J] 10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5K]10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. [Figure 5L] 10 is a diagram showing another state during one cycle of the relative movement between the second compression chamber 40 and the wrap of the fixed scroll and the wrap 62 of the orbiting scroll. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0022] 1 is a schematic longitudinal cross-sectional view of a scroll compressor 100 according to one embodiment. The scroll compressor 100 is a fluid machine configured to compress and discharge a fluid (i.e., a refrigerant gas), and can be a component of a refrigeration cycle device. The scroll compressor 100 according to this embodiment is a shell-type compressor that is installed vertically.

[0023] As shown in FIG. 1, the scroll compressor 100 includes a sealed container 1, a suction pipe 5 formed as a hollow cylindrical tube and penetrating an upper surface of the sealed container 1, a discharge pipe 6 that discharges refrigerant gas to the outside, a scroll compression element 3 configured to compress low-pressure refrigerant gas in a first compression chamber 30 and a second compression chamber 40, an electric element 2 accommodated in the sealed container 1 and configured to drive the scroll compression element 3, and a crankshaft 4 including a main shaft portion 4a and an eccentric shaft portion 4b that is eccentric with respect to the main shaft portion 4a.

[0024] An upper portion of the scroll compression element 3 is supported by a middle shell 1a of the sealed container 1. The scroll compression element 3 is fixed to the middle shell 1a of the sealed container 1 by shrink fitting or by another method. A subframe 7 is provided below the electric element 2. The subframe 7 is fixed to the inner peripheral surface of the sealed container 1.

[0025] A suction pipe 5 configured to draw low-pressure refrigerant gas from the outside into the scroll compression element 3 is connected to the side of the sealed container 1. A discharge pipe 6 configured to discharge high-pressure refrigerant gas to the outside of the scroll compressor 100 is connected to the side of the sealed container 1.

[0026] The scroll compression element 3 is housed in a sealed container 1 and configured to compress refrigerant gas sucked through a suction pipe 5 by rotation of a crankshaft 4 driven by an electric element 2. As shown in FIG. 1 , the scroll compression element 3 includes a fixed scroll 50 and an orbiting scroll 60.

[0027] Furthermore, the scroll compression element 3 has a discharge hole 50a formed in the center of the fixed scroll 50, which is configured to discharge compressed refrigerant gas.

[0028] 1 and 2, the fixed scroll 50 has a lower end portion fixed to the middle shell 1a. The fixed scroll 50 includes a fixed scroll end plate 51 and a fixed scroll spiral wrap 52 standing on the fixed scroll end plate 51. The fixed scroll wrap 52 has an involute curve shape so as to form a spiral body, and stands on one surface of the fixed scroll end plate 51.

[0029] As shown in Figures 3A and 3B, the fixed scroll winding start portion 53 of the fixed scroll wrap 52 includes a first outer circular arc 54 of the fixed scroll that smoothly connects the tip of the fixed scroll wrap 52 to the winding start point of the involute curve of the outer wall of the fixed scroll wrap 52, a second inner circular arc 55 of the fixed scroll that smoothly contacts the winding start point of the involute curve of the inner wall of the fixed scroll wrap 52, and a third inner circular arc 56 of the fixed scroll that does not smoothly connect to the first outer circular arc 54 of the fixed scroll and the second inner circular arc 52 of the fixed scroll, but is formed to connect the first outer circular arc 54 of the fixed scroll and the second inner circular arc 55 of the fixed scroll.

[0030] 1 and 2, the orbiting scroll 60 is configured to oscillate relative to the fixed scroll 50, which does not rotate. The orbiting scroll 60 includes an orbiting scroll end plate 61 and an orbiting scroll spiral wrap 62 standing on the orbiting scroll end plate 61. The orbiting scroll wrap 62 has an involute curve shape so as to form a spiral body, and stands on one surface of the orbiting scroll end plate 61.

[0031] As shown in Figures 3A and 3C, the orbiting scroll winding start portion 63 of the orbiting scroll wrap 62 includes a first outer circular arc 64 of the orbiting scroll that smoothly connects the tip of the orbiting scroll wrap 62 to the winding start point of the involute curve of the outer wall of the orbiting scroll wrap 62, and a second inner circular arc 65 of the orbiting scroll that smoothly contacts the winding start point of the involute curve of the inner wall of the orbiting scroll wrap 62.

[0032] Furthermore, the orbiting scroll 60 is configured to orbit when the first outer circular arc 64 of the orbiting scroll is in contact with the second inner circular arc 55 of the fixed scroll. Therefore, when the radius of curvature of the second inner circular arc 55 of the fixed scroll is set to "R2F," the radius of curvature of the first outer circular arc 64 of the orbiting scroll is set to "R10," and the eccentric radius of the eccentric shaft portion 4b of the crankshaft 4 is set to "ER," the following equation is satisfied between the second inner circular arc 55 of the fixed scroll, the first outer circular arc 64 of the orbiting scroll, and the eccentric shaft portion 4b of the crankshaft 4.

[0033] R2F=R1O+ER

[0034] That is, the radius of curvature R2F of the second inner circular arc 55 of the fixed scroll is equal to the sum of the radius of curvature R10 of the first outer circular arc 64 of the orbiting scroll and the eccentric radius ER of the eccentric shaft portion 4b of the crankshaft 4.

[0035] Furthermore, the orbiting scroll 60 is configured to orbit when the second inner circular arc 65 of the orbiting scroll is in contact with the first outer circular arc 54 of the fixed scroll. Therefore, when the radius of curvature of the first outer circular arc 54 of the fixed scroll is set to "R1F," the radius of curvature of the second inner circular arc 65 of the orbiting scroll is set to "R2O," and the eccentric radius of the eccentric shaft portion 4b of the crankshaft 4 is set to "ER," the following equation is satisfied between the first outer circular arc 54 of the fixed scroll, the second inner circular arc 65 of the orbiting scroll, and the eccentric shaft portion 4b of the crankshaft 4.

[0036] R2O=R1F+ER

[0037] That is, the radius of curvature R2O of the second inner circular arc 65 of the orbiting scroll is equal to the sum of the radius of curvature R1F of the first outer circular arc 54 of the fixed scroll and the eccentric radius ER of the eccentric shaft portion 4b of the crankshaft 4.

[0038] Additionally, the radius of curvature R1O of the first outer circular arc 64 of the orbiting scroll and the radius of curvature R1F of the first outer circular arc 54 of the fixed scroll are preferably 1 mm to 5 mm.

[0039] A bottomed cylindrical rocking bearing 66 is formed at approximately the center of the underside of the end plate 61 of the rocking scroll. The eccentric shaft portion 4b, which is eccentric with respect to the main shaft portion 4a of the crankshaft 4, is installed at the upper end of the main shaft portion 4a of the crankshaft 4. The eccentric shaft portion 4b is inserted into the rocking bearing 66 to rock the rocking scroll 60.

[0040] As shown in FIG. 2, the inner wall of the wrap 52 of the fixed scroll and the outer wall of the wrap 62 of the orbiting scroll form the first compression chamber 30, and the wrap 62 of the orbiting scroll is configured to mesh with the wrap 52 of the fixed scroll to form the second compression chamber 40 with the outer wall of the wrap 52 of the fixed scroll and the inner wall of the wrap 62 of the orbiting scroll.

[0041] 1, the electric element 2 includes an electric motor stator 2a fixed to the inner circumferential surface of the sealed container 1 by shrink fitting or another method, an electric motor rotor 2b rotatably housed inside the electric motor stator 2a, and a main shaft portion 4a of a crankshaft 4 fixed to the electric motor rotor 2b. The electric motor rotor 2b is configured to rotate when electric power is supplied to the electric motor stator 2a and transmit driving force to the orbiting scroll 60 via the crankshaft 4.

[0042] Next, the relationship between the movement of the orbiting scroll 60 relative to the fixed scroll 50 and the change in shape of the first and second compression chambers 30, 40 when the scroll compressor 100 is in operation will be described.

[0043] 4A to 4L are diagrams showing the first compression chamber 30 and one cycle of relative motion between the wrap 52 of the fixed scroll and the wrap 62 of the orbiting scroll. The point at which the first outer circular arc 64 of the orbiting scroll first contacts the second inner circular arc 55 of the fixed scroll in the first compression chamber 30 is defined as 0 degrees as the first rotation angle A1 of the orbiting scroll 60. In this embodiment, when the first rotation angle A1 exceeds the first predetermined angle A11, the first outer circular arc 64 of the orbiting scroll no longer contacts the second inner circular arc 55 of the fixed scroll in the first compression chamber 30.

[0044] 4A, the first outer circular arc 64 of the orbiting scroll is tangent to the second inner circular arc 55 of the fixed scroll. The second inner circular arc 55 of the fixed scroll is formed so as to smoothly contact the winding start point of the involute curve of the inner wall of the wrap 52 of the fixed scroll, so that the first outer circular arc 64 of the orbiting scroll is tangent to the second inner circular arc 55 of the fixed scroll.

[0045] 4B to 4D, the orbiting scroll 60 orbits when the first outer circular arc 64 of the orbiting scroll is tangent to the second inner circular arc 55 of the fixed scroll. Thereafter, the first outer circular arc 64 of the orbiting scroll is tangent to the connection point between the second inner circular arc 55 of the fixed scroll and the third inner circular arc 56 of the fixed scroll.

[0046] Third, as shown in FIG. 4E, after the first outer circular arc 64 of the orbiting scroll contacts the connection point between the second inner circular arc 55 of the fixed scroll and the third inner circular arc 56 of the fixed scroll, the first compression chamber 30 communicates with the discharge hole 50a.

[0047] That is, when the first outer circular arc 64 of the orbiting scroll is no longer in contact with the connection point between the second inner circular arc 55 of the fixed scroll and the third inner circular arc 56 of the fixed scroll, the first compression chamber 30 communicates with the discharge hole 50a. In other words, when the first rotation angle A1 exceeds the first predetermined angle A11, the first compression chamber 30 remains in communication with the discharge hole 50a while the first rotation angle A1 is above the first predetermined angle A11.

[0048] 4D and 4E, the first compression chamber 30 communicates with the discharge hole 50a while the first rotation angle A1 exceeds a first predetermined angle A11, which is between 90 and 120 degrees.

[0049] Finally, the orbiting scroll 60 continues to orbit, and the compressed refrigerant gas is discharged from the discharge hole 50a.

[0050] Therefore, when the first compression chamber 30 communicates with the discharge hole 50a, backflow of compressed refrigerant gas can be prevented between the first outer circular arc 64 of the orbiting scroll and the second inner circular arc 55 of the fixed scroll. Furthermore, since backflow of compressed refrigerant gas is prevented, the compression rate of the refrigerant gas can be improved.

[0051] 5A to 5L are diagrams showing the second compression chamber 40 and one cycle of relative motion between the wrap 52 of the fixed scroll and the wrap 62 of the orbiting scroll. The point at which the second inner circular arc 65 of the orbiting scroll first contacts the first outer circular arc 54 of the fixed scroll in the second compression chamber 40 is defined as 0 degrees as the second rotation angle A2 of the orbiting scroll 60. In this embodiment, when the second rotation angle A2 exceeds the second predetermined angle A21, the second inner circular arc 65 of the orbiting scroll no longer contacts the first outer circular arc 54 of the fixed scroll in the second compression chamber 40.

[0052] 5A, the second inner circular arc 65 of the orbiting scroll is tangent to the first outer circular arc 54 of the fixed scroll. Since the second inner circular arc 65 of the orbiting scroll is formed so as to be smoothly tangent to the winding start point of the involute curve of the inner wall of the wrap 62 of the orbiting scroll, the second inner circular arc 65 of the orbiting scroll is smoothly tangent to the first outer circular arc 54 of the fixed scroll.

[0053] Second, as shown in FIGS. 5B to 5D, the orbiting scroll 60 orbits when the second inner circular arc 65 of the orbiting scroll is in contact with the first outer circular arc 54 of the fixed scroll.

[0054] Third, as shown in FIG. 5E, after the first outer circular arc 54 of the fixed scroll comes into contact with the second inner circular arc 65 of the orbiting scroll, the second compression chamber 40 communicates with the discharge hole 50a.

[0055] That is, when the first outer circular arc 54 of the fixed scroll contacts the second inner circular arc 65 of the orbiting scroll, the second compression chamber 40 communicates with the discharge hole 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 hole 50a while the second rotation angle A2 exceeds the second predetermined angle A21.

[0056] 5D and 5E, the second compression chamber 40 communicates with the discharge hole 50a while the second rotation angle A2 exceeds the second predetermined angle 21. The second predetermined angle 21 is between 90 and 120 degrees.

[0057] Finally, the orbiting scroll 60 continues to orbit, and the compressed refrigerant gas is discharged from the discharge hole 50a.

[0058] Therefore, when the second compression chamber 40 communicates with the discharge hole 50a, backflow of compressed refrigerant gas can be prevented between the second inner circular arc 65 of the orbiting scroll and the first outer circular arc 54 of the fixed scroll. Furthermore, since backflow of compressed refrigerant gas is prevented, the compression rate of the refrigerant gas can be improved.

[0059] Therefore, according to this embodiment of the scroll compressor 100, when the first compression chamber 30 and the second compression chamber 40 are connected to the discharge hole 50a, it is possible to prevent backflow of the compressed refrigerant gas and improve the compression rate of the refrigerant gas.

[0060] Additionally, in this embodiment, the first predetermined angle A11 is between 90 degrees and 120 degrees (FIGS. 4D and 4E), but is not limited thereto. The maximum angle of the first predetermined angle A11 is 180 degrees. Furthermore, the second predetermined angle A21 is between 90 degrees and 120 degrees (FIGS. 5D and 5E), but is not limited thereto. The maximum angle of the second predetermined angle A21 is 180 degrees.

[0061] While specific embodiments of the present invention have been disclosed and described, and are further illustrated in the accompanying drawings, this is for the purpose of better understanding the principles of the present invention and is not intended to limit the scope and spirit of the present teachings. Various structural adaptations and modifications, such as design or materials of the present invention, may be made and will be apparent to those skilled in the art without departing from the scope of the present invention, as determined by the claims. [Explanation of symbols]

[0062] 100 Scroll Compressor 1. Airtight container 1a Middle Shell 2 Electric elements 2a Motor stator 2b Motor rotor 3 Scroll Compression Factor 4 crankshaft 4a Main shaft part 4b Eccentric shaft part 5. Intake pipe 6. Discharge pipe 7 Subframe 30 First compression chamber 40 Second compression chamber 50 Fixed Scroll 50a discharge hole 51 Fixed Scroll Head Plate 52 Fixed Scroll Wrap 53 Fixed scroll winding start part 54 Fixed scroll first outer arc 55 Second inner arc of fixed scroll 56 Third inner arc of fixed scroll 60 Swinging Scroll 61 Swing scroll head plate 62 Swinging scroll wrap 63 Oscillating scroll winding start part 64 First outer arc of swing scroll 65 Second inner arc of the swing scroll 66 Rocking bearing R1F Radius of curvature of the first outer circular arc 54 of the fixed scroll R2F: Radius of curvature of the second inner arc 55 of the fixed scroll R1O: Radius of curvature of the first outer circular arc 64 of the orbiting scroll R2O: Radius of curvature of the second inner circular arc 65 of the orbiting scroll ER: Eccentric radius of the eccentric shaft portion 4b of the crankshaft 4 A1 First rotation angle A2 Second rotation angle

Claims

1. A scroll compressor (100), comprising: A sealed container (1), an electric element (2) housed in the sealed container (1); a scroll compression element (3) accommodated in the sealed container (1) and configured to be driven by a crankshaft (4) of the electric element (2); a suction pipe (5) extending through the sealed container (1) to allow refrigerant gas drawn from the outside to flow into the scroll compression element (3); Equipped with The scroll compression element (3) includes a fixed scroll (50) and an orbiting scroll (60), a spiral wrap (52) of the fixed scroll is erected on an end plate (51) of the fixed scroll, and a spiral wrap (62) of the orbiting scroll is erected on an end plate (61) of the orbiting scroll, The wrap (62) of the orbiting scroll is configured to mesh with the wrap (52) of the fixed scroll so that an inner wall of the wrap (52) of the fixed scroll and an outer wall of the wrap (62) of the orbiting scroll form a first compression chamber (30), and the outer wall of the wrap (52) of the fixed scroll and an inner wall of the wrap (62) of the orbiting scroll form a second compression chamber (40), The orbiting scroll (60) is configured to orbit relative to the fixed scroll (50), a discharge hole (50a) for discharging the refrigerant gas compressed in the scroll compression element (3) is formed in the fixed scroll (50); The fixed scroll winding start portion (53) of the wrap (52) of the fixed scroll is a first outer circular arc (54) of the fixed scroll that smoothly connects a tip of the wrap (52) of the fixed scroll to a winding start point of an involute curve of the outer wall of the wrap (52) of the fixed scroll; a second inner circular arc (55) of the fixed scroll that smoothly contacts the winding start point of the involute curve of the inner wall of the wrap (52) of the fixed scroll; a third inner arc (56) of the fixed scroll that is not smoothly connected to the first outer arc (54) of the fixed scroll and the second inner arc (55) of the fixed scroll, the third inner arc (56) of the fixed scroll being formed so as to connect the first outer arc (54) of the fixed scroll and the second inner arc (55) of the fixed scroll, The orbiting scroll winding start portion (63) of the wrap (62) of the orbiting scroll is a first outer circular arc (64) of the orbiting scroll that smoothly connects a tip of the wrap (62) of the orbiting scroll to a winding start point of an involute curve of the outer wall of the wrap (62) of the orbiting scroll; a second inner arc (65) of the orbiting scroll that smoothly contacts the winding start point of the involute curve of the inner wall of the wrap (62) of the orbiting scroll, When the first outer circular arc (64) of the orbiting scroll is in contact with the second inner circular arc (55) of the fixed scroll, the orbiting scroll (60) orbits, and thereafter, when the first outer circular arc (64) of the orbiting scroll is no longer in contact with the connection point between the second inner circular arc (55) of the fixed scroll and the third inner circular arc (56) of the fixed scroll, the first compression chamber (30) communicates with the discharge hole (50a). A scroll compressor (100).

2. 2. The scroll compressor (100) according to claim 1, wherein the orbiting scroll (60) orbits when the second inner circular arc (65) of the orbiting scroll is in contact with the first outer circular arc (54) of the fixed scroll, and thereafter, when the first outer circular arc (54) of the fixed scroll is in contact with the second inner circular arc (65) of the orbiting scroll, the second compression chamber (40) communicates with the discharge hole (50 a).

3. 2. The scroll compressor according to claim 1, wherein a point in time when the first outer circular arc (64) of the orbiting scroll first comes into contact with the second inner circular arc (55) of the fixed scroll in the first compression chamber (30) is defined as 0 degrees as a first rotation angle (A1) of the orbiting scroll (60), and when the first rotation angle (A1) exceeds a first predetermined angle (A11), the first outer circular arc (64) of the orbiting scroll no longer comes into contact with the second inner circular arc (55) of the fixed scroll in the first compression chamber (30), and the first compression chamber (30) is in communication with the discharge hole (50 a) while the first rotation angle (A1) exceeds the first predetermined angle (A11).

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

5. 3. The scroll compressor according to claim 2, wherein a time point at which the second inner circular arc (65) of the orbiting scroll first comes into contact with the first outer circular arc (54) of the fixed scroll in the second compression chamber (40) is defined as 0 degrees as a second rotation angle (A2) of the orbiting scroll (60), and when the second rotation angle (A2) exceeds a second predetermined angle (A21), the second inner circular arc (65) of the orbiting scroll no longer comes into contact with the first outer circular arc (54) of the fixed scroll in the second compression chamber (40), and the second compression chamber (40) is in communication with the discharge hole (50 a) while the second rotation angle (A2) exceeds the second predetermined angle (A21).

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

7. 2. The scroll compressor according to claim 1, wherein a radius of curvature (R2F) of the second inner circular arc (55) of the fixed scroll is equal to the sum of a radius of curvature (R1O) of the first outer circular arc (64) of the orbiting scroll and an eccentric radius (ER) of an eccentric shaft portion (4b) of the crankshaft (4).

8. 2. The scroll compressor according to claim 1, wherein a radius of curvature (R2O) of the second inner circular arc (65) of the orbiting scroll is equal to the sum of a radius of curvature (R1F) of the first outer circular arc (54) of the fixed scroll and an eccentric radius (ER) of an eccentric shaft portion (4b) of the crankshaft (4).

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

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

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