Orbiting scroll plate, scroll compressor and air conditioner

Abstract

An orbiting scroll plate, a scroll compressor and an air conditioner. The orbiting scroll plate comprises an orbiting scroll plate body and an orbiting scroll tooth provided on the orbiting scroll plate body. The orbiting scroll tooth comprises a first scroll tooth section (11), a second scroll tooth section (12) and a third scroll tooth section (13), which are connected in sequence, wherein the third scroll tooth section (13) is close to the center of the orbiting scroll plate body; the second scroll tooth section (12) comprises a first end and a second end; the first scroll tooth section (11) is connected to the first end; the third scroll tooth section (13) is connected to the second end; the average wall thickness of the first scroll tooth section (11) is greater than or equal to the wall thickness of the first end; and the average wall thickness of the third scroll tooth section (13) is greater than or equal to the wall thickness of the second end. In the orbiting scroll plate, the thickness and strength of the head and tail of the orbiting scroll tooth are increased at the same time, such that the degree of deformation of the orbiting scroll tooth is reduced when the orbiting scroll tooth is stressed during operation, thereby improving the operation efficiency and reliability of the scroll compressor, and the machining difficulty of the orbiting scroll tooth is simplified, thereby guaranteeing the profile tolerance of the orbiting scroll tooth, and improving the performance and reliability of the scroll compressor.

Description

Orbital scroll, scroll compressor and air conditioner

[0001] This disclosure claims priority to the Chinese patent application filed with the China Patent Office on September 25, 2023, with application number 202311265646.8 and invention name “Moving scroll, scroll compressor and air conditioner”, the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0002] The present disclosure relates to the technical field of scroll compressors, and in particular to a movable scroll, a scroll compressor, and an air conditioner. Background Art

[0003] Traditional scroll compressors typically use a circular involute to create the scroll profiles of the orbiting and stationary scrolls. These meshing scroll profiles form the compression chambers. The inner and outer profiles of the meshing area of ​​the scroll tooth walls are the same type of curves with different parameters, resulting in a generally constant wall thickness from the outside to the inside of the meshing area. However, during compression, as the compression chamber volume decreases and pressure rises, the scroll is subjected to increasing forces toward the center, leading to insufficient central strength in traditional scroll profiles.

[0004] Related technologies use variable wall thickness profiles to solve the problem of central strength, that is, a profile with gradually increasing wall thickness from the outside to the inside is designed to form a scroll. The center wall thickness of the scroll is strengthened, but the outermost wall thickness of the scroll becomes thinner. The thinning of the outer wall thickness of the scroll brings the following two adverse effects: (1) It is easy to deform during processing and operation. Especially for large-displacement compressors with high tooth height, too thin wall thickness makes it difficult to process the scroll and cannot ensure the contour. At the same time, the force during operation will also increase its deformation, causing leakage, side wall collision and other problems, seriously affecting the performance and reliability of the compressor; (2) When the air-conditioning system is heating at low temperature, the evaporation side is prone to incomplete evaporation and liquid. When the compressor inhales excessive liquid during the suction process, liquid hammer problem occurs. At this time, the outermost tooth wall of the scroll is subjected to a sharp increase in pressure. The too thin wall thickness reduces the strength and is very likely to cause tooth breakage problem.

[0005] Summary of the Invention

[0006] The present disclosure aims to address at least one of the technical problems existing in the related art. To this end, the present disclosure proposes a scroll compressor that can simultaneously increase the head and tail portions of the orbiting scroll, thereby increasing the strength of the orbiting scroll, reducing its deformation, and improving the operating efficiency and reliability of the scroll compressor.

[0007] In the first aspect, the present disclosure proposes a movable scroll, comprising a movable scroll body and a movable scroll tooth provided on the movable scroll body, the movable scroll tooth comprising a first scroll tooth segment, a second scroll tooth segment and a third scroll tooth segment connected in sequence, the third scroll tooth segment being close to the center of the movable scroll body, the second scroll tooth segment comprising a first end and a second end, the first scroll tooth segment being connected to the first end, the third scroll tooth segment being connected to the second end, the first scroll tooth segment, the second scroll tooth segment and the third scroll tooth segment being all meshing areas, the average wall thickness of the first scroll tooth segment being greater than or equal to the wall thickness at the first end, and the average wall thickness of the third scroll tooth segment being greater than or equal to the wall thickness at the second end.

[0008] According to the movable scroll disclosed in the present invention, by setting the average wall thickness of the first scroll tooth segment to be greater than or equal to the wall thickness at the first end, and the average wall thickness of the third scroll tooth segment to be greater than or equal to the wall thickness at the second end, the thickness and strength of the head and tail of the movable scroll tooth are increased at the same time, so that the deformation degree of the movable scroll tooth is reduced when subjected to stress during operation, thereby improving the operating efficiency and reliability of the scroll compressor.

[0009] According to the movable scroll of the present disclosure, the wall thickness of the first volute segment gradually decreases in a direction approaching the second volute segment.

[0010] According to the movable scroll disclosed in the present invention, it is possible to achieve thickening in necessary local areas of the movable scroll teeth, which can reduce the peripheral deformation of the movable scroll teeth, improve the movable scroll teeth's ability to resist liquid hammer, and avoid the problems of increased movable scroll mass and increased centrifugal force during high-speed operation caused by the overall thickening of the movable scroll teeth.

[0011] According to the orbiting scroll disclosed herein, the wall thickness of the second scroll segment gradually increases as it approaches the third scroll segment. This thickness is gradually increased as it approaches the third scroll segment, so that the wall thickness of the second scroll segment ultimately connects with the wall thickness of the third scroll segment at the second end. This simplifies the structural arrangement, ensures the structural strength of the orbiting scroll, and avoids the problems of increased orbiting scroll mass and increased centrifugal force during high-speed operation caused by an overall thickening of the orbiting scroll.

[0012] According to the movable scroll of the present disclosure, the wall thickness of the third wrap segment gradually increases in a direction gradually away from the second wrap segment.

[0013] According to the movable scroll disclosed in the present invention, such an arrangement can enhance the structural strength of the movable scroll tooth near the center area, ensure the structural strength of the third scroll tooth segment, and at the same time avoid the problems of increased movable scroll mass and increased centrifugal force during high-speed operation caused by the overall thickening of the movable scroll tooth.

[0014] According to the movable scroll disclosed herein, the outer contour line of the first vortex tooth segment is a first circular arc line, the outer contour lines of the second vortex tooth segment and the third vortex tooth segment are connected in sequence to form a first circular involute, and the first circular arc line and the first circular involute are tangent at the first end.

[0015] According to the movable scroll disclosed herein, the outer contour line of the first vortex tooth segment is set as a first circular arc line, so that the wall thickness of the first vortex tooth segment can be changed by increasing the radius of the first circular arc line, thereby simplifying the structural setting of the movable vortex tooth.

[0016] In some embodiments, the radius of curvature of the first circular involute at the first end is p b1 , the radius of the first arc is r1, then ρ b1 and r1 satisfies: r1 / ρ b1 =1.05~2.

[0017] According to the movable scroll disclosed in the present invention, only the key area of ​​the movable scroll is locally thickened, which not only ensures the structural strength of the movable scroll and reduces deformation, but also avoids unnecessary increase in the mass of the movable scroll.

[0018] According to the movable scroll disclosed in the present invention, the inner contour line of the first vortex tooth segment is a second circular arc line, the inner contour lines of the second vortex tooth segment and the third vortex tooth segment are connected in sequence to form a second circular involute, and the second circular arc line and the second circular involute are tangent at the first end.

[0019] According to the movable scroll disclosed herein, the inner contour line of the first vortex tooth segment is set as the second circular arc line, so that the wall thickness of the first vortex tooth segment can be changed by increasing the radius of the second circular arc line, thereby simplifying the structural setting of the movable vortex tooth.

[0020] In some embodiments, the radius of curvature of the second circular involute at the first end is p b2 , the radius of the second arc is r2, then ρ b2 and r1 satisfy: r2 / ρ b2 =1.05~2.

[0021] According to the movable scroll disclosed in the present invention, only the key area of ​​the movable scroll is locally thickened, which not only ensures the structural strength of the movable scroll and reduces deformation, but also avoids unnecessary increase in the mass of the movable scroll.

[0022] In some embodiments, the movable scroll is configured to engage with the static scroll, the static scroll includes a static scroll tooth, the static scroll tooth includes a first static scroll segment and a second static scroll segment connected, the second static scroll segment is close to the center of the static scroll tooth, the inner profile of the first static scroll segment is a third circular arc line, the inner profile of the second static scroll segment is a third circular involute, the first static scroll segment engages with the first scroll tooth segment, and the second static scroll segment engages with the second scroll tooth segment and the third scroll tooth segment at the same time.

[0023] According to the movable scroll disclosed in the present invention, the structural arrangement of the fixed scroll can be simplified so that its structure can match that of the movable scroll, thereby enabling the movable scroll and the fixed scroll to mesh with each other.

[0024] In a second aspect, the present disclosure provides a scroll compressor comprising the above-mentioned movable scroll.

[0025] According to the scroll compressor disclosed herein, the thickness and strength of the head and tail of the movable scroll gear are increased simultaneously, so that the deformation degree of the movable scroll gear is reduced when subjected to stress during operation, thereby improving the operating efficiency and reliability of the scroll compressor.

[0026] In a third aspect, the present disclosure provides an air conditioner comprising the scroll compressor described above.

[0027] The air conditioner according to the present disclosure includes a scroll compressor with improved operating efficiency and reliability, thereby improving the operating efficiency and reliability of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] FIG1 is a schematic diagram of the meshing of an orbiting scroll and a fixed scroll according to an embodiment of the present disclosure.

[0031] Reference numerals: first scroll segment 11 , first circular arc line ab, second circular arc line cd, second scroll segment 12 , first circular involute bc, third scroll segment 13 , third circular involute b'c'. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0033] The disclosure below provides many different embodiments or examples for implementing different structures of the present disclosure. In order to simplify the disclosure of the present disclosure, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present disclosure. In addition, the present disclosure may repeat reference numbers and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0034] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or motion state, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device can be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0035] As shown in Figure 1, the movable scroll according to the embodiment of the present disclosure includes a movable scroll body and a movable scroll tooth provided on the movable scroll body, the movable scroll tooth includes a first scroll tooth segment 11, a second scroll tooth segment 12 and a third scroll tooth segment 13 which are connected in sequence, the third scroll tooth segment 13 is close to the center of the movable scroll body, the second scroll tooth segment 12 includes a first end and a second end, the first scroll tooth segment 11 is connected to the first end, and the third scroll tooth segment 13 is connected to the second end, the first scroll tooth segment 11, the second scroll tooth segment 12 and the third scroll tooth segment 13 are all meshing areas, the average wall thickness of the first scroll tooth segment 11 is greater than or equal to the wall thickness at the first end, and the average wall thickness of the third scroll tooth segment 13 is greater than or equal to the wall thickness at the second end.

[0036] To elaborate, the first vortex tooth segment 11 is away from the center of the movable scroll body, and the first vortex tooth segment 11, the second vortex tooth segment 12 and the third vortex tooth segment 13 are connected in sequence from the head to the tail along the extension direction of the movable scroll tooth. The third vortex tooth segment 13 is subjected to greater force during the operation of the scroll compressor. Therefore, the average wall thickness of the third vortex tooth segment 13 is set to be greater than or equal to the wall thickness at the second end, which can ensure the structural strength of the tail of the movable scroll tooth and prevent it from increasing in force and deformation. When the air conditioner is heated at low temperature, the evaporation side is prone to incomplete evaporation and liquid. When the scroll compressor inhales excessive liquid during the suction process, liquid hammer problem is prone to occur. At this time, the force on the first vortex tooth segment 11 of the movable scroll tooth increases sharply. Therefore, the average wall thickness of the first vortex tooth segment 11 is set to be greater than or equal to the wall thickness at the first end, so that the strength of the first vortex tooth segment 11 is increased to prevent tooth breakage problems.

[0037] Among them, the end of the movable scroll tooth close to the center of the movable scroll body is defined as the tail of the movable scroll tooth, the end of the movable scroll tooth away from the center of the movable scroll body is defined as the head, and one end is defined as any length along the extension direction from the end face.

[0038] In addition, the wall thickness of the first scroll segment 11 can gradually increase, gradually decrease, or remain unchanged from the head to the tail along the extension direction of the orbiting scroll. The wall thickness of the third scroll segment 13 can gradually increase, gradually decrease, or remain unchanged from the head to the tail along the extension direction of the orbiting scroll.

[0039] According to the movable scroll of the embodiment of the present disclosure, by setting the average wall thickness of the first scroll tooth segment 11 to be greater than or equal to the wall thickness at the first end, and the average wall thickness of the third scroll tooth segment 13 to be greater than or equal to the wall thickness at the second end, the thickness and strength of the head and tail of the movable scroll tooth are increased at the same time, so that the deformation degree of the movable scroll tooth is reduced when subjected to stress during operation, thereby improving the operating efficiency and reliability of the scroll compressor. At the same time, it can simplify the processing difficulty of the movable scroll tooth, ensure the contour of the movable scroll tooth, and thus ensure the performance and reliability of the scroll compressor.

[0040] As shown in Figure 1, according to an embodiment of the orbiting scroll of the present disclosure, the wall thickness of the first scroll segment 11 gradually decreases as it approaches the second scroll segment 12. This increases the wall thickness and strength of the first scroll segment 11, reduces deformation of the orbiting scroll's periphery, improves its resistance to liquid hammer, prevents it from breaking during liquid hammer, and avoids the problems of increased orbiting scroll mass and increased centrifugal force during high-speed operation caused by an overall thickening of the orbiting scroll.

[0041] According to the embodiment of the present disclosure, the movable scroll can be thickened in the necessary local area of ​​the movable scroll tooth, which can reduce the peripheral deformation of the movable scroll tooth, improve the movable scroll tooth's ability to resist liquid hammer, and avoid the problems of increased movable scroll mass and increased centrifugal force during high-speed operation caused by the overall thickening of the movable scroll tooth.

[0042] As shown in FIG1 , according to an embodiment of the orbiting scroll of the present disclosure, the wall thickness of the second scroll segment 12 gradually increases as it approaches the third scroll segment 13. The wall thickness of the second scroll segment 12 gradually increases as it approaches the third scroll segment 13 so that the wall thickness of the second scroll segment 12 ultimately connects with the wall thickness of the third scroll segment 13 at the second end. This simplifies the structural arrangement, ensures the structural strength of the orbiting scroll, and avoids the problems of increased orbiting scroll mass and increased centrifugal force during high-speed operation caused by an overall thickening of the orbiting scroll.

[0043] As shown in FIG. 1 , according to the movable scroll of the embodiment of the present disclosure, the wall thickness of the third swirl segment 13 gradually increases in a direction away from the second swirl segment 12 .

[0044] According to the movable scroll of the embodiment of the present disclosure, such an arrangement can enhance the structural strength of the movable scroll tooth near the center area, thereby ensuring the structural strength of the third scroll tooth segment 13, while avoiding the problems of increased movable scroll mass and increased centrifugal force during high-speed operation caused by the overall thickening of the movable scroll tooth.

[0045] As shown in Figure 1, according to the movable scroll embodiment of the present disclosure, the outer contour line of the first swirl tooth segment 11 is the first circular arc line ab, and the outer contour lines of the second swirl tooth segment 12 and the third swirl tooth segment 13 are connected in sequence to form a first circular involute bc, and the first circular arc line ab and the first circular involute bc are tangent at the first end.

[0046] According to the orbiting scroll of the disclosed embodiment, the outer contour of the first scroll segment 11 is set as the first circular arc line ab. This allows the wall thickness of the first scroll segment 11 to be changed by increasing the radius of the first circular arc line ab, simplifying the structural configuration of the orbiting scroll. The first circular arc line ab and the first circular involute line bc are tangent at the first end, allowing the first circular arc line ab and the first circular involute line bc to smoothly connect, preventing stress concentration areas in the orbiting scroll and improving the structural strength of the orbiting scroll.

[0047] In some embodiments, the radius of curvature of the first circular involute bc at the first end is p b1 , the radius of the first arc ab is r1, then ρ b1 and r1 satisfies: r1 / ρ b1 =1.05~2.

[0048] Where r1 / ρ b1It can be 1.05, 1.1, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, 1.55, 1.60, 1.65, 1.70, 1.85, 1.90, 1.95 and 2, etc.

[0049] According to the movable scroll of the embodiment of the present disclosure, only the key area of ​​the movable scroll is locally thickened, which not only ensures the structural strength of the movable scroll and reduces deformation, but also avoids unnecessary increase in the mass of the movable scroll.

[0050] As shown in Figure 1, according to an embodiment of the orbiting scroll disclosed herein, the inner contour of the first scroll segment 11 is a second circular arc line cd. The inner contour lines of the second and third scroll segments 12, 13 are sequentially connected to form a second circular involute. The second circular arc line cd and the second circular involute are tangent at their first ends. This tangency at their second ends allows for a smooth connection between the second circular arc line cd and the second circular involute, preventing stress concentration areas in the orbiting scroll and improving its structural strength.

[0051] According to the movable scroll of the embodiment of the present disclosure, the inner contour line of the first vortex tooth segment 11 is set to the second circular arc line cd, so that the wall thickness of the first vortex tooth segment 11 can be changed by increasing the radius of the second circular arc line cd, thereby simplifying the structural setting of the movable vortex tooth.

[0052] In some embodiments, the radius of curvature of the second circular involute at the first end is p b2 , the radius of the second arc cd is r2, then ρ b2 and r1 satisfy: r2 / ρ b2 =1.05~2.

[0053] Where r2 / ρ b2 It can be 1.05, 1.1, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, 1.55, 1.60, 1.65, 1.70, 1.85, 1.90, 1.95 and 2, etc.

[0054] According to the movable scroll of the embodiment of the present disclosure, only the key area of ​​the movable scroll is locally thickened, which not only ensures the structural strength of the movable scroll and reduces deformation, but also avoids unnecessary increase in the mass of the movable scroll.

[0055] As shown in Figure 1, in some embodiments, the orbiting scroll is configured to engage with the static scroll, the static scroll includes a static scroll tooth, the static scroll tooth includes a first static scroll segment and a second static scroll segment connected, the second static scroll segment is close to the center of the static scroll tooth, the inner profile of the first static scroll segment is a third circular arc line, the inner profile of the second static scroll segment is a third circular involute b'c', the first static scroll segment engages with the first scroll tooth segment 11, and the second static scroll segment engages with the second scroll tooth segment 12 and the third scroll tooth segment 13 at the same time.

[0056] The diameters of the first circular arc ab, the second circular arc cd and the third circular arc are different, and the parameters of the first circular involute bc, the second circular involute b'c' and the third circular involute b'c' are different.

[0057] According to the movable scroll of the embodiment of the present disclosure, the structural setting of the fixed scroll can be simplified so that its structure can match the movable scroll, thereby enabling the movable scroll and the fixed scroll to mesh with each other.

[0058] The inner contour line of the third scroll segment 13 includes a fourth circular arc line.

[0059] A scroll compressor according to an embodiment of the present disclosure includes the above-mentioned movable scroll.

[0060] According to the scroll compressor of the embodiment of the present disclosure, the thickness and strength of the head and tail of the movable scroll tooth are increased at the same time, so that the deformation degree of the movable scroll tooth is reduced when subjected to stress during operation, thereby improving the operating efficiency and reliability of the scroll compressor.

[0061] An air conditioner according to an embodiment of the present disclosure includes the scroll compressor described above.

[0062] According to the embodiment of the present disclosure, the air conditioner includes a scroll compressor with improved operating efficiency and reliability, thereby improving the operating efficiency and reliability of the air conditioner.

[0063] In the description of the present disclosure, it is also necessary to understand that a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0064] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0065] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A movable scroll, comprising a movable scroll body and a movable scroll tooth arranged on the movable scroll body, the movable scroll tooth comprising a first scroll tooth segment, a second scroll tooth segment and a third scroll tooth segment connected in sequence, the third scroll tooth segment is close to the center of the movable scroll body, the second scroll tooth segment comprises a first end and a second end, the first scroll tooth segment is connected to the first end, the third scroll tooth segment is connected to the second end, the first scroll tooth segment, the second scroll tooth segment and the third scroll tooth segment are all meshing areas, the average wall thickness of the first scroll tooth segment is greater than or equal to the wall thickness at the first end, and the average wall thickness of the third scroll tooth segment is greater than or equal to the wall thickness at the second end.

2. The movable scroll according to claim 1, wherein: The wall thickness of the first volute tooth segment gradually decreases in a direction approaching the second volute tooth segment.

3. The movable scroll according to claim 1, wherein: The wall thickness of the second volute tooth segment gradually increases in a direction gradually approaching the third volute tooth segment.

4. The movable scroll according to claim 1, wherein: The wall thickness of the third volute tooth segment gradually increases in a direction gradually away from the second volute tooth segment.

5. The movable scroll according to claim 1, wherein: The outer contour line of the first scroll tooth segment is a first circular arc line, and the outer contour lines of the second scroll tooth segment and the third scroll tooth segment are sequentially connected to form a first circular involute, and the first circular arc line and the first circular involute are tangent at the first end.

6. The movable scroll according to claim 5, wherein: The radius of curvature of the first circular involute at the first end is ρ b1 , the radius of the first arc is r1, then ρ b1 and r1 satisfies: r1 / ρ b1 =1.05~2.

7. The movable scroll according to claim 1, wherein: The inner contour line of the first swirl tooth segment is a second circular arc line, the inner contour lines of the second swirl tooth segment and the third swirl tooth segment are sequentially connected to form a second circular involute, and the second circular arc line and the second circular involute are tangent at the first end.

8. The movable scroll according to claim 7, wherein: The radius of curvature of the second circular involute at the first end is ρ b2 , the radius of the second arc is r2, then ρ b2 and r1 satisfies: r2 / ρ b2 =1.05~2.

9. The movable scroll according to claim 5, wherein: The movable scroll is configured to engage with a fixed scroll, the fixed scroll includes a fixed scroll tooth, the fixed scroll tooth includes a first fixed scroll section and a second fixed scroll section connected, the second fixed scroll section is close to the center of the fixed scroll tooth, the inner contour of the first fixed scroll section is a third circular arc line, the inner contour of the second fixed scroll section is a third circular involute, the first fixed scroll section is engaged with the first scroll tooth section, and the second fixed scroll section is engaged with the second scroll tooth section and the third scroll tooth section at the same time.

10. A scroll compressor, comprising the movable scroll according to any one of claims 1 to 9.

11. An air conditioner comprising the scroll compressor according to claim 10.

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