scroll compressor

Abstract

The present application provides a scroll compressor. The scroll compressor includes an orbiting scroll and a fixed scroll. The orbiting scroll includes an inner profile, an outer profile, and a tooth head profile, and the fixed scroll includes an inner profile, an outer profile, and a tooth head profile. The inner profile of the orbiting scroll includes a first arc segment and a first involute segment, and the outer profile of the fixed scroll includes a fourth arc segment and a fourth involute segment. The first arc segment is located on the side of the first inner disengagement point away from the first tooth head profile, and the fourth arc segment is located on the side of the second outer disengagement point away from the second tooth head profile. And / or, the outer profile of the orbiting scroll includes a second arc segment and a second involute segment, and the inner profile of the fixed scroll includes a third arc segment and a third involute segment. The second arc segment is located on the side of the first outer disengagement point away from the first tooth head profile, and the third arc segment is located on the side of the second inner disengagement point away from the second tooth head profile. According to the scroll compressor of the present application, rapid exhaust can be achieved, exhaust over-compression can be reduced, and compressor efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a scroll compressor. Background Art

[0002] The scroll compressor has the advantages of simple structure, small size, light weight, low noise, high mechanical efficiency and smooth operation. The scroll compressor is a fluid machine that uses volume changes to achieve gas compression. The orbiting and static scrolls are the main pump body parts. The most commonly used profiles of the orbiting and static scrolls are the involute of a circle and its correction curve. The orbiting scroll and the static scroll are assembled opposite each other with a phase angle difference of 180 degrees. The orbiting scroll moves under the drive of the crankshaft and meshes with the static scroll to form a series of crescent-shaped closed cavities that are isolated from each other and have continuously changing volumes. When the refrigerant in the compression chamber is compressed to the point where the profile disengages, the compression chamber communicates with the static scroll exhaust port and begins to exhaust. Since a certain angle of rotation is still required from the disengagement of the scroll tooth profile to the wide-open exhaust, this process will result in over-compression problems, which increases the compression power consumption. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present application is to provide a scroll compressor that can achieve rapid exhaust, reduce exhaust over-compression, reduce power loss, and improve compressor efficiency.

[0004] In order to solve the above problems, the present application provides a scroll compressor, comprising an orbiting scroll and a fixed scroll, wherein the orbiting scroll comprises an inner profile line of the orbiting scroll, an outer profile line of the orbiting scroll, and a first tooth head profile line, and the fixed scroll comprises an inner profile line of the fixed scroll, an outer profile line of the fixed scroll, and a second tooth head profile line;

[0005] The inner profile of the orbiting scroll includes a first arc segment and a first involute segment, the first involute segment is connected to the first tooth head profile via the first arc segment, the outer profile of the fixed scroll includes a fourth arc segment and a fourth involute segment, the fourth involute segment is connected to the second tooth head profile via the fourth arc segment, the orbiting scroll includes a first inner disengagement point, the fixed scroll includes a second outer disengagement point, the first arc segment is located on a side of the first inner disengagement point away from the first tooth head profile, and the fourth arc segment is located on a side of the second outer disengagement point away from the second tooth head profile;

[0006] And / or, the outer profile of the movable scroll includes a second arc segment and a second involute segment, the second involute segment is connected to the first tooth head profile through the second arc segment, the inner profile of the fixed scroll includes a third arc segment and a third involute segment, the third involute segment is connected to the second tooth head profile through the third arc segment, the movable scroll includes a first outer disengagement point, the fixed scroll includes a second inner disengagement point, the second arc segment is located on the side of the first outer disengagement point away from the first tooth head profile, and the third arc segment is located on the side of the second inner disengagement point away from the second tooth head profile.

[0007] Preferably, the first arc segment is tangent to the first tooth head profile at the connection position, the first arc segment is tangent to the first involute segment at the connection position, the fourth arc segment is tangent to the second tooth head profile at the connection position, and the fourth arc segment is tangent to the fourth involute segment at the connection position.

[0008] Preferably, the second arc segment is tangent to the first tooth head profile at the connection position, the second arc segment is tangent to the second involute segment at the connection position, the third arc segment is tangent to the second tooth head profile at the connection position, and the third arc segment is tangent to the third involute segment at the connection position.

[0009] Preferably, the first arc segment and the first tooth head profile intersect at a first inner disengagement point, and the fourth arc segment and the second tooth head profile intersect at a second outer disengagement point.

[0010] Preferably, the second arc segment and the first tooth head profile intersect at a first outer disengagement point, and the third arc segment and the second tooth head profile intersect at a second inner disengagement point.

[0011] Preferably, the radius of the first arc segment is R1, the radius of the fourth arc segment is R3, R1-R3=r, wherein r is the rotation radius of the orbiting scroll.

[0012] Preferably, the radius of the second arc segment is R2, the radius of the third arc segment is R4, R4-R2=r, wherein r is the rotation radius of the orbiting scroll.

[0013] Preferably, the central angles of the first arc segment and the fourth arc segment are the same.

[0014] Preferably, the central angles of the second arc segment and the third arc segment are the same.

[0015] Preferably, the first tooth head profile includes multiple arc segments or a combination of arc segments and straight line segments.

[0016] Preferably, the second tooth head profile includes multiple arc segments or a combination of arc segments and straight line segments.

[0017] The scroll compressor provided by the present application includes an orbiting scroll and a static scroll, the orbiting scroll includes an inner profile line of the orbiting scroll, an outer profile line of the orbiting scroll and a first tooth head profile line, the static scroll includes an inner profile line of the static scroll, an outer profile line of the static scroll and a second tooth head profile line; the inner profile line of the orbiting scroll includes a first arc segment and a first involute segment, the first involute segment is connected to the first tooth head profile line through the first arc segment, the outer profile line of the static scroll includes a fourth arc segment and a fourth involute segment, the fourth involute segment is connected to the second tooth head profile line through the fourth arc segment, the orbiting scroll includes a first inner disengagement point, the static scroll includes a second outer disengagement point, the first arc segment is located at the first inner disengagement point The fourth arc segment is located on the side away from the second tooth head profile line of the second outer disengagement point; and / or, the outer profile of the movable scroll includes a second arc segment and a second involute segment, the second involute segment is connected to the first tooth head profile line through the second arc segment, the inner profile of the fixed scroll includes a third arc segment and a third involute segment, the third involute segment is connected to the second tooth head profile line through the third arc segment, the movable scroll includes a first outer disengagement point, the second arc segment is located on the side of the first outer disengagement point away from the first tooth head profile line, the fixed scroll includes a second inner disengagement point, and the third arc segment is located on the side of the second inner disengagement point away from the second tooth head profile line. The scroll compressor of the present application adds an arc curve before the disengagement point of the inner profile of the movable scroll and the outer profile of the static scroll, and adjusts the inner profile of the movable scroll and the outer profile of the static scroll through the arc transition curve, and changes the structure of the inner profile of the movable scroll and the outer profile of the static scroll, so that the inner cavity can be quickly exhausted after the inner profile of the movable scroll and the outer profile of the static scroll reach the disengagement point, and / or adds an arc curve before the disengagement point of the outer profile of the movable scroll and the inner profile of the static scroll, and adjusts the outer profile of the movable scroll and the inner profile of the static scroll through the arc transition curve, and changes the structure of the outer profile of the movable scroll and the inner profile of the static scroll, so that the outer cavity can be quickly exhausted after the outer profile of the movable scroll and the inner profile of the static scroll reach the disengagement point, thereby reducing over-compression loss in the exhaust process, reducing power loss, and improving compressor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic cross-sectional view of a scroll compressor according to an embodiment of the present application;

[0019] Figure 2 Schematic diagram of the coordination of the orbiting scroll and the stationary scroll of the scroll compressor according to an embodiment of the present application;

[0020] Figure 3 Schematic diagram of the structure of the fixed scroll wrap of the scroll compressor according to an embodiment of the present application;

[0021] Figure 4 Schematic diagram of the structure of the orbiting scroll wrap of the scroll compressor according to an embodiment of the present application;

[0022] Figures 5a-5d Schematic diagram of the movement process of the orbiting scroll and the fixed scroll of the scroll compressor according to an embodiment of the present application;

[0023] Figures 6a-6d Schematic diagram of the movement of the orbiting scroll and the fixed scroll of the scroll compressor according to an embodiment of the present application at various rotation angles;

[0024] Figure 7 A comparison diagram of the outer cavity exhaust effect of the scroll compressor of the embodiment of the present application and a compressor of conventional design;

[0025] Figures 8a-8d The figure is a schematic diagram of the movement process of the orbiting scroll and the stationary scroll of a conventional scroll compressor in the prior art.

[0026] The reference numerals indicate:

[0027] 1. Orbital scroll; 2. Stationary scroll; 3. Upper bracket; 4. Rotor; 5. Casing; 6. Lower support ring; 7. Lower cover; 8. Lower bracket; 9. Motor; 10. Crankshaft; 11. Cross slip ring; 12. Upper cover; 13. Intake pipe; 100. Orbital scroll tooth; 101. Second involute segment; 102. First involute segment; 103. First circular arc segment; 104. First tooth head profile; 105. Second circular arc segment; 106. Exhaust groove; 200. Stationary scroll tooth; 201. Third involute segment; 202. Fourth involute segment; 203. Third circular arc segment; 204. Second tooth head profile; 205. Fourth circular arc segment; 206. Exhaust port; 500. Outer cavity; 600. Inner cavity. DETAILED DESCRIPTION

[0028] See also Figures 1 to 7 As shown, according to an embodiment of the present application, the scroll compressor includes a movable scroll 1, a fixed scroll 2, an upper bracket 3, a rotor 4, a casing 5, a lower support ring 6, a lower cover 7, a lower bracket 8, a motor 9, a crankshaft 10, a cross slip ring 11, an upper cover 12, etc. The motor 9 is fixed to the casing 5 by a shrink fit, and the upper bracket 3 is fixed to the casing 5 by eight-point welding. The movable scroll 1 and the fixed scroll 2 have a phase angle difference of 180 degrees and are mounted on the upper bracket 3. The movable scroll 1 moves under the drive of the crankshaft 10 and engages with the fixed scroll 2 to form a series of crescent-shaped closed cavities that are isolated from each other and have continuously changing volumes. The fixed scroll 2 is fixed to the upper bracket 3 by screw fasteners. The crankshaft assembly is supported by the lower bracket 8, which is fixed to the lower support ring 6 by screws, and the lower support ring 6 is fixed to the casing 5 by spot welding.

[0029] When the compressor is running, the motor 9 drives the crankshaft 10 to rotate, and the crank of the crankshaft 10 drives the orbiting scroll 1 to move. Under the anti-rotation restriction of the cross ring 11, the orbiting scroll 1 performs translational motion around the center of the crankshaft 10 with a fixed radius r. The refrigerant entering through the intake pipe 13 is sucked into the crescent-shaped intake chamber formed by the orbiting scroll 1 and the fixed scroll 2. After being compressed, it is discharged through the exhaust hole of the fixed scroll 2 and enters the high-temperature exhaust chamber between the upper cover 1 and the fixed scroll 2. Then, through the exhaust groove of the fixed scroll 2 and the upper bracket 3, it enters the chamber between the upper bracket 3 and the motor 9. Finally, the high-temperature and high-pressure exhaust refrigerant is discharged through the exhaust pipe.

[0030] The orbiting scroll 1 includes an orbiting scroll vortex 100 , which includes an orbiting scroll inner profile line, an orbiting scroll outer profile line, and a first tooth head profile line 104 . The fixed scroll 2 includes a fixed scroll vortex 200 , which includes a fixed scroll inner profile line, an orbiting scroll outer profile line, and a second tooth head profile line 204 .

[0031] The inner profile of the movable scroll includes a first arc segment 103 and a first involute segment 102, and the first involute segment 102 is connected to the first tooth head profile 104 through the first arc segment 103. The outer profile of the fixed scroll includes a fourth arc segment 205 and a fourth involute segment 202, and the fourth involute segment 202 is connected to the second tooth head profile 204 through the fourth arc segment 205. The movable scroll 1 includes a first inner disengagement point, and the fixed scroll 2 includes a second outer disengagement point. The first arc segment 103 is located on the side of the first inner disengagement point away from the first tooth head profile 104, and the fourth arc segment 205 is located on the side of the second outer disengagement point away from the second tooth head profile 204.

[0032] The outer profile of the movable scroll includes a second arc segment 105 and a second involute segment 101, and the second involute segment 101 is connected to the first tooth head profile 104 through the second arc segment 105. The inner profile of the fixed scroll includes a third arc segment 203 and a third involute segment 201, and the third involute segment 201 is connected to the second tooth head profile 204 through the third arc segment 203. The movable scroll 1 includes a first outer disengagement point, and the fixed scroll 2 includes a second inner disengagement point. The second arc segment 105 is located on the side of the first outer disengagement point away from the first tooth head profile 104, and the third arc segment 203 is located on the side of the second inner disengagement point away from the second tooth head profile 204.

[0033] The scroll compressor of the present application adds an arc curve before the disengagement point of the inner profile line of the orbiting scroll and the outer profile line of the static scroll, and adjusts the inner profile line of the orbiting scroll and the outer profile line of the static scroll through the arc transition curve to change the structure of the inner profile line of the orbiting scroll and the outer profile line of the static scroll, so that the inner cavity 600 can achieve rapid exhaust after the inner profile line of the orbiting scroll and the outer profile line of the static scroll reach the disengagement point.

[0034] A circular arc curve is added before the disengagement point of the outer profile line of the orbiting scroll and the inner profile line of the static scroll, and the outer profile line of the orbiting scroll and the inner profile line of the static scroll are adjusted through the circular arc transition curve to change the structure of the outer profile line of the orbiting scroll and the inner profile line of the static scroll, so that the outer cavity 500 can achieve rapid exhaust after the outer profile line of the orbiting scroll and the inner profile line of the static scroll reach the disengagement point.

[0035] Through the above-mentioned structural improvements, the structures of the first tooth head profile 104 of the movable scroll 1 and the second tooth head profile 204 of the fixed scroll 2 can be adjusted, and at the same time, the linear structures of the movable scroll 1 and the fixed scroll 2 before the disengagement point can be improved, so that after the scroll compressor reaches the disengagement point, it can quickly reach the large opening exhaust position for rapid exhaust, thereby reducing over-compression loss in the exhaust process, reducing power loss, and improving compressor efficiency.

[0036] The above and following statements of this application are based on Figure 2 The description is based on the cross-sectional structure shown.

[0037] The first arc segment 103 is tangent to the first tooth head profile 104 at the connection position, the first arc segment 103 is tangent to the first involute segment 102 at the connection position, the fourth arc segment 205 is tangent to the second tooth head profile 204 at the connection position, and the fourth arc segment 205 is tangent to the fourth involute segment 202 at the connection position.

[0038] Since the two ends of the first arc segment 103 are tangent to the first tooth head profile 104 and the first involute segment 102 respectively, when the first arc segment 103 is determined, the structures of the first tooth head profile 104 and the first involute segment 102 are also basically determined. Since the structure of the first arc segment 103 is an arc, which is different from the first involute segment 102 in the known technology, the setting of the first arc segment 103 causes the structures of the first tooth head profile 104 and the first involute segment 102 to change accordingly, thereby changing the tooth head structure of the movable scroll 1. The head of the tooth head structure moves backward, the inner profile is offset toward the center of the exhaust port, the maximum thickness of the tooth head structure is thickened, and the strength of the tooth head structure is increased, thereby ensuring the operating reliability of the compressor.

[0039] In this embodiment, the first inner disengagement point of the inner profile of the movable scroll is N2, the first outer disengagement point of the outer profile of the movable scroll is N3, the second inner disengagement point of the inner profile of the static scroll is N6, and the second outer disengagement point of the outer profile of the static scroll is N7.

[0040] The second arc segment 105 is tangent to the first tooth head profile 104 at the connection position, the second arc segment 105 is tangent to the second involute segment 101 at the connection position, the third arc segment 203 is tangent to the second tooth head profile 204 at the connection position, and the third arc segment 203 is tangent to the third involute segment 201 at the connection position.

[0041] Since the two ends of the third arc segment 203 are tangent to the second tooth head profile 204 and the third involute segment 201 respectively, after the third arc segment 203 is determined, the structures of the second tooth head profile 204 and the third involute segment 201 are also basically determined. Since the structure of the third arc segment 203 is an arc, which is different from the third involute segment 201 in the known technology, the setting of the third arc segment 203 causes the structures of the second tooth head profile 204 and the third involute segment 201 to change accordingly, thereby changing the tooth head structure of the static scroll 2. The head of the tooth head structure moves backward, the inner profile is offset toward the center of the exhaust port, the maximum thickness of the tooth head structure is thickened, and the strength of the tooth head structure is increased, thereby ensuring the operating reliability of the compressor.

[0042] The first arc segment 103 and the first tooth tip profile line 104 intersect at a first inner disengagement point, the fourth arc segment 205 and the second tooth tip profile line 204 intersect at a second outer disengagement point. The second arc segment 105 and the first tooth tip profile line 104 intersect at a first outer disengagement point, and the third arc segment 203 and the second tooth tip profile line 204 intersect at a second inner disengagement point.

[0043] The two endpoints of the first arc segment 103 are N1 and N2 respectively, the two endpoints of the second arc segment 105 are N3 and N4 respectively, the two endpoints of the third arc segment 203 are N5 and N6 respectively, and the two endpoints of the fourth arc segment 205 are N7 and N8 respectively.

[0044] The compression chamber formed by the meshing and sealing of the outer profile of the orbiting scroll 1 and the inner profile of the fixed scroll 2 is the outer chamber 500, and the compression chamber formed by the meshing and sealing of the inner profile of the orbiting scroll 1 and the outer profile of the fixed scroll 2 is the inner chamber 600.

[0045] The central angles of the first arc segment 103 of the inner profile of the orbiting scroll 1 and the fourth arc segment 205 of the outer profile of the static scroll 2 are the same, both being α. The radius of the first arc segment 103 is R1, and the radius of the fourth arc segment 205 is R4. R1-R3=r, where r is the rotation radius of the orbiting scroll 1.

[0046] The central angles of the second arc segment 105 of the outer profile of the orbiting scroll 1 and the third arc segment 203 of the inner profile of the static scroll 2 are the same, both being β. The radius of the second arc segment 105 is R3, and the radius of the third arc segment 203 is R4. R4-R2=r, where r is the rotation radius of the orbiting scroll 1.

[0047] The first tooth head profile 104 includes multiple arc segments or a combination of arc segments and straight line segments, which makes the structure of the first tooth head profile 104 more diverse and more convenient to achieve tangential connection with the first arc segment 105 and the second arc segment 103.

[0048] The second tooth head profile 204 includes multiple arc segments or a combination of arc segments and straight line segments, which makes the second tooth head profile 204 more diverse in structure and more convenient to achieve tangential connection with the third arc segment 203 and the fourth arc segment 205 .

[0049] See also Figures 5a to 5d As shown in the figure, it is the process diagram of the outer cavity exhaust of the scroll compressor. Figure 5a and Figure 5b As shown, the arc segment 105 of the outer profile of the orbiting scroll 1 meshes with the arc segment 203 of the inner profile of the fixed scroll 2. When the first outer disengagement point N3 on the arc segment 105 and the second inner disengagement point N6 on the arc segment 203 coincide with each other, the profile reaches the disengagement point position, the outer cavity 500 begins to exhaust, and at the same time, the outer cavity 500 communicates with the exhaust port 206 of the fixed scroll 2. Figure 5c and Figure 5d As shown, the arc segment 103 of the inner profile of the movable scroll 1 is engaged with the arc segment 205 of the outer profile of the fixed scroll 2. When the first inner disengagement point N2 on the arc segment 103 and the second outer disengagement point N7 on the arc segment 205 coincide with each other, the profile reaches the disengagement point position, and the inner cavity 600 begins to exhaust. At the same time, the inner cavity 600 is communicated with the exhaust groove 106 of the movable scroll 1, and the exhaust groove 106 is communicated with the exhaust port 206 of the fixed scroll 2, thereby realizing the exhaust of the inner cavity 600.

[0050] Figures 8a to 8d The figure is a schematic diagram of the motion structure of the orbiting scroll and the fixed scroll of known design. The involute 301 is the outer profile of the vortex tooth 300 of the fixed scroll 2, 302 is the inner profile of the vortex tooth 300 of the fixed scroll 2, and the curve 303 is the tooth head arc curve, which is composed of multiple arcs or line segments. The curve 303 is tangent to the involute 301 and the involute 302. The involute 401 is the outer profile of the vortex tooth 400 of the orbiting scroll 1, 402 is the inner profile of the vortex tooth 400 of the orbiting scroll 1, and the curve 403 is the tooth head arc curve, which is composed of multiple arcs or line segments. The curve 403 is tangent to the involute 401 and the involute 402. Figures 8a to 8d As shown, when the disengagement point N11 on the involute 401 of the movable scroll 1 coincides with the disengagement point N10 on the involute 302 of the fixed scroll 1, the outer cavity begins to exhaust; when the disengagement point N12 on the involute 402 of the movable scroll 1 coincides with the point N9 on the involute 301 of the fixed scroll 1, the inner cavity begins to exhaust.

[0051] By Figures 5a to 5d The structure and motion process of the dynamic and static scroll 2 of this application are similar to Figures 8a to 8dBy comparing the structure and movement process of the movable and static scrolls 2 with the known technology, it can be learned that, relative to the known technology, the tooth head structure of the movable scroll 1 in the present application moves backward, the inner profile of the movable scroll 1 moves inward, and the basic position of the outer profile does not change much; the tooth head structure of the static scroll 2 moves backward, the inner profile of the static scroll 2 moves inward, and the basic position of the outer profile does not change much, so that the tooth head structure thickness of the movable scroll 1 of the present application is greater than the tooth head structure thickness of the movable scroll 1 of the known technology, and the tooth head structure thickness of the static scroll 2 of the present application is greater than the tooth head thickness of the static scroll 2 of the known technology. At the same time, the movable scroll 1 and the static scroll 2 of the present application can enter the large opening exhaust position more quickly than the known technology, which greatly improves the over-compression phenomenon.

[0052] Figures 6a to 6d This is a schematic diagram of the movement of the orbiting and stationary plates of the outer cavity of the scroll compressor in an embodiment of the present application at the disengagement point and when the orbiting scroll rotates 36 degrees, 76 degrees, and 116 degrees after disengagement. Figure 7 This is a comparison diagram of the opening distances of the scroll compressor of the embodiment of the present application and the scroll compressor of the prior art at various positions. Figures 6a to 6d and Figure 7 It can be seen that as the rotation angle increases, the opening distance d between the tooth head structure of the movable scroll 1 and the tooth head structure of the fixed scroll 2 of the present application gradually increases, which is more conducive to exhaust, can reduce exhaust loss and improve compressor efficiency.

[0053] In addition, it can be seen from the figure that during the entire movement process of the movable scroll and the static scroll, the opening distance d of the tooth head structure of the movable scroll 1 and the tooth head structure of the static scroll 2 of the present application is always greater than the opening distance of the tooth head structure of the movable scroll 1 and the tooth head structure of the static scroll 2 of the known technology at the same angular position. Therefore, compared with the known technology, the over-compression problem can be greatly improved.

[0054] Table 1

[0055]

[0056] Table 1 is a comparison table of the tooth head thickness of the static and movable disks of the embodiment of the present application and the known design. It can be found that when the inner and outer contours of the vortex teeth and the compression chamber volume ratio remain unchanged and the areas of the static scroll exhaust ports (exhaust ports 206 and exhaust ports 304) are similar, the maximum thickness T1max of the tooth head of the static scroll 2 of the embodiment of the present application is 6.4mm (as shown in FIG. Figure 3 As shown), it is thicker than the maximum thickness T3max of the tooth head of the static scroll 2 in the known design = 5.5 mm (as shown Figure 8b The maximum thickness of the tooth head of the movable scroll 1 of the embodiment of the present application is T2max=6.0mm (as shown in FIG. Figure 3 As shown), the maximum thickness of the tooth head of the movable scroll 1 in the known design is T4max=5.0mm (as shown Figure 8cTherefore, the scroll compressor of the embodiment of the present application greatly increases the thickness of the scroll tooth head and improves the strength and reliability of the scroll teeth.

[0057] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0058] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A scroll compressor, characterized in that: The movable scroll comprises an inner profile line of the movable scroll, an outer profile line of the movable scroll, and a first tooth head profile line, and the fixed scroll comprises an inner profile line of the fixed scroll, an outer profile line of the fixed scroll, and a second tooth head profile line; The inner profile of the orbiting scroll includes a first arc segment and a first involute segment, the first involute segment is connected to the first tooth head profile via the first arc segment, the outer profile of the fixed scroll includes a fourth arc segment and a fourth involute segment, the fourth involute segment is connected to the second tooth head profile via the fourth arc segment, the orbiting scroll includes a first inner disengagement point, the fixed scroll includes a second outer disengagement point, the first arc segment is located on a side of the first inner disengagement point away from the first tooth head profile, and the fourth arc segment is located on a side of the second outer disengagement point away from the second tooth head profile; the first arc segment is tangent to the first tooth head profile at a connection position, the first arc segment is tangent to the first involute segment at a connection position, the fourth arc segment is tangent to the second tooth head profile at a connection position, and the fourth arc segment is tangent to the fourth involute segment at a connection position; And / or, the outer profile of the movable scroll includes a second arc segment and a second involute segment, the second involute segment is connected to the first tooth head profile through the second arc segment, the inner profile of the fixed scroll includes a third arc segment and a third involute segment, the third involute segment is connected to the second tooth head profile through the third arc segment, the movable scroll includes a first outer disengagement point, the fixed scroll includes a second inner disengagement point, the second arc segment is located on the side of the first outer disengagement point away from the first tooth head profile, and the third arc segment is located on the side of the second inner disengagement point away from the second tooth head profile; the second arc segment is tangent to the first tooth head profile at the connection position, the second arc segment is tangent to the second involute segment at the connection position, the third arc segment is tangent to the second tooth head profile at the connection position, and the third arc segment is tangent to the third involute segment at the connection position.

2. The scroll compressor according to claim 1, wherein: The first arc segment and the first tooth head profile intersect at the first inner disengagement point, and the fourth arc segment and the second tooth head profile intersect at the second outer disengagement point.

3. The scroll compressor according to claim 1, wherein: The second arc segment and the first tooth head profile intersect at the first outer disengagement point, and the third arc segment and the second tooth head profile intersect at the second inner disengagement point.

4. The scroll compressor according to claim 1, wherein The radius of the first arc segment is R1, the radius of the fourth arc segment is R3, R1-R3=r, wherein r is the rotation radius of the orbiting scroll.

5. The scroll compressor according to claim 1, wherein: The radius of the second arc segment is R2, the radius of the third arc segment is R4, R4-R2=r, wherein r is the rotation radius of the orbiting scroll.

6. The scroll compressor according to claim 1, wherein: The central angles of the first arc segment and the fourth arc segment are the same.

7. The scroll compressor according to claim 1, wherein: The central angles of the second arc segment and the third arc segment are the same.

8. The scroll compressor according to claim 1, wherein: The first tooth head profile includes multiple arc segments or a combination of arc segments and straight line segments.

9. The scroll compressor according to claim 1, wherein: The second tooth head profile includes a plurality of arc segments or a combination of arc segments and straight line segments.

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