Positioning assembly for scroll compressor, and scroll compressor

Abstract

A scroll compressor and a positioning assembly for the scroll compressor. The positioning assembly comprises a first part and a second part which are mounted in a matching manner. The first part is provided with a step portion, and the step portion comprises a first radial positioning surface and a first axial positioning surface. The second part is provided with a second radial positioning surface and a second axial positioning surface, and the second radial positioning surface cooperates with the first radial positioning surface to radially position the first part. The second axial positioning surface cooperates with the first axial positioning surface to axially position the first part. The first part is provided with an undercut groove located between the first radial positioning surface and the first axial positioning surface. The undercut groove comprises a first side surface, a second side surface and a bottom surface. The first side surface and the second side surface are parallel and are inclined relative to the axial direction. The technical solution can ensure the positioning precision of the positioning assembly, so that the assembly precision of the scroll compressor can be ensured, thereby being conducive to improving the performance of the scroll compressor.

Description

Positioning assembly for scroll compressor and scroll compressor Technical Field

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

[0002] Current scroll compressors typically include a casing located outside, a first scroll (e.g., a fixed scroll), a second scroll (e.g., an orbiting scroll), a crankshaft, a drive motor, and a support frame located within the casing. The fixed and orbiting scrolls cooperate to form a compression chamber, and the support frame is fixed relative to the casing and axially supports the fixed and orbiting scrolls.

[0003] To ensure good compression performance in a scroll compressor, each component must be precisely positioned to ensure accurate fit. Currently, scroll compressors suffer from poor positioning accuracy due to manufacturing process issues, which in turn affects the compressor's compression performance. Summary of the Invention

[0004] In view of this, the present application provides a positioning assembly for a scroll compressor and a scroll compressor having the same, so as to improve the positioning accuracy difference between components in the scroll compressor.

[0005] On the one hand, an embodiment of the present application provides a positioning assembly for a scroll compressor, which includes a first component and a second component that are mounted in a cooperative manner. A step portion is provided on the first component, and the step portion includes a first radial positioning surface and a first axial positioning surface perpendicular to the first radial positioning surface. A second radial positioning surface and a second axial positioning surface are provided on the second component, and the second radial positioning surface cooperates with the first radial positioning surface to radially position the first component, and the second axial positioning surface cooperates with the first axial positioning surface to axially position the first component. A tool relief groove is provided on the first component between the first radial positioning surface and the first axial positioning surface, and the tool relief groove includes a first side surface close to the first radial positioning surface, a second side surface close to the first axial positioning surface, and a bottom surface between the first side surface and the second side surface; wherein the first side surface and the second side surface are parallel and inclined relative to the axial direction.

[0006] In some embodiments, the bottom surface is semicircular.

[0007] In some embodiments, the bottom surface is a plane, and rounded corners or chamfers are formed between the bottom surface and the first side surface and the second side surface.

[0008] In some embodiments, the angle α between the first side surface and the second side surface and the axial direction is 15° to 75° or 35° to 55°.

[0009] In some embodiments, the angle α between the first side surface and the second side surface and the axial direction is 45°.

[0010] In some embodiments, a vertical distance d between the first side surface and the second side surface is 0.8 mm to 5 mm.

[0011] In some embodiments, the widths b of the first side surface and the second side surface in the depth direction of the undercut are respectively 0.1 mm to 10 mm or 0.1 mm to 4 mm.

[0012] In some embodiments, the height h1 of the step portion in the axial direction is 2 mm to 6 mm, and the height h2 of the first radial positioning surface in the axial direction is 0.5 mm to 4 mm;

[0013] In some embodiments, a height h1 of the step portion in the axial direction is 3 mm to 6 mm, and a height h2 of the first radial positioning surface in the axial direction is 1.5 mm to 3.5 mm.

[0014] On the other hand, the present application also provides a scroll compressor, which includes a housing, a compression mechanism, a drive mechanism, and at least one positioning assembly described in any of the above embodiments. The housing is provided with an intake port and an exhaust port. The compression mechanism is housed within the housing and includes a first scroll and a second scroll. The scroll teeth of the first scroll and the scroll teeth of the second scroll have a matching structure to cooperate to form a compression chamber, and at least one of the first scroll and the second scroll is an orbiting scroll. The drive mechanism is used to drive the orbiting scroll to rotate, thereby compressing the fluid from the intake port and discharging the compressed fluid from the exhaust port.

[0015] In some embodiments, the at least one positioning assembly includes at least one of a first positioning assembly, a second positioning assembly, a third positioning assembly, a fourth positioning assembly, and a fifth positioning assembly. In the first positioning assembly, one of the first and second components is a fixed scroll disk of the scroll compressor, and the other is a support frame supporting the fixed scroll disk. In the second positioning assembly, one of the first and second components is a support frame of the scroll compressor, and the other is a middle casing of the scroll compressor. In the third positioning assembly, one of the first and second components is a support frame of the scroll compressor, and the other is the upper end of the stator housing of the scroll compressor motor. In the fourth positioning assembly, one of the first and second components is a lower support seat located at the lower end of the scroll compressor motor, and the other is the lower end of the stator housing of the scroll compressor motor. In the fifth positioning assembly, one of the first and second components is a balance weight of the scroll compressor that rotates with the crankshaft, and the other is the crankshaft of the scroll compressor.

[0016] The technical solution provided in the present application is conducive to improving the radial and axial positioning accuracy of the first component and the second component assembled with each other in the scroll compressor, and is conducive to improving the assembly accuracy of the scroll compressor, thereby improving the compression performance of the scroll compressor.

[0017] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings that constitute a part of this application are used to provide further understanding of this application. The schematic implementation methods and descriptions of this application are used to explain this application and do not constitute improper limitations on this application.

[0019] FIG1 is a schematic structural diagram of positioning of two components according to a comparative embodiment of the present application.

[0020] FIG2 is a schematic structural diagram of positioning of two components in another comparative embodiment according to the present application.

[0021] FIG3 is a schematic structural diagram of positioning two components in yet another comparative embodiment of the present application.

[0022] FIG4 is a schematic structural diagram of positioning two components according to an embodiment of the present application.

[0023] FIG5 is a schematic structural diagram of positioning two components according to another embodiment of the present application.

[0024] FIG6 is a schematic structural diagram of positioning two components according to an embodiment of the present application.

[0025] FIG7 is a schematic structural diagram of positioning two components according to another embodiment of the present application.

[0026] FIG8 is a schematic structural diagram of a scroll compressor according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0028] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," "radial," "circumferential," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include at least one of these features.

[0030] A scroll compressor includes a compressor housing, which is provided with an intake port and a discharge port. The intake port is configured to supply refrigerant to be compressed to the scroll compressor, and the discharge port is configured to discharge the compressed refrigerant. The scroll compressor also includes a motor, a crankshaft, a compression unit, and a support frame disposed within the compressor housing. The support frame is fixed relative to the compressor housing. The compression unit includes a first scroll (e.g., a fixed scroll) supported on the support frame and a second scroll (e.g., an orbiting scroll) that cooperates with the fixed scroll. The motor drives the crankshaft to rotate, which in turn drives the orbiting scroll along a predetermined trajectory, so that the orbiting scroll and the fixed scroll cooperate to compress the refrigerant.

[0031] It should be noted that one of the first scroll and the second scroll may be an orbiting scroll, and the other may be a fixed scroll, or both the first scroll and the second scroll may be orbiting scrolls.

[0032] Each compressor component requires good positioning accuracy to ensure the precise fit between the first and second scrolls, for example, between the fixed and orbiting scrolls, thereby ensuring the compressor's compression performance. The technical solution provided in this application can effectively improve the positioning accuracy of compressor components.

[0033] In order to facilitate understanding of the technical innovations and beneficial effects of the technical solution to be protected in this application, some examples of comparative solutions are first provided based on Figures 1 to 3.

[0034] In the embodiment shown in Figures 1 and 2, the fixed scroll 100 is provided with a radial locating surface 102 and an axial locating surface 103 that cooperate with the support frame 200. To facilitate machining of the locating surfaces, a tool relief groove 101 is provided between the radial locating surface 102 and the axial locating surface 103. During machining, for example, when the grinding tool 300 shown in Figure 1 is used to grind to form the radial locating surface 102 and the axial locating surface 103, a residual machining surface 104 remains on the axial locating surface 103 after the grinding tool 300 is completed.

[0035] When the support frame 200 positions the fixed scroll 100, as shown in FIG2 , the top surface of the support frame 200 will contact the machining residual surface 104. In this way, a gap G is formed between the support frame 200 and the fixed scroll 100, that is, the fixed scroll 100 will be raised to a certain height compared to the normal design, which will cause the gap between the fixed scroll 100 and the matching movable scroll to increase in the vertical direction, thereby causing leakage problems in the compressor. In addition, since the axial height of the portion of the fixed scroll 100 below the axial positioning surface 103 is relatively low, as shown in FIG2 , after the undercut groove 101 is machined, the axial height of the radial positioning surface 102 formed is even lower, which will cause the radial positioning of the support frame 200 and the fixed scroll 100 to fail, thereby affecting the performance of the scroll compressor.

[0036] In the embodiment shown in FIG3 , the support frame 200 is positioned in cooperation with the middle shell 400 of the scroll compressor. An axial positioning surface 203 and a radial positioning surface 202 for cooperating with the middle shell 400 are formed on the support frame 200. In this embodiment, since the step structure of the support frame 200 has a smaller size in the radial direction, after the tool recess 201 is processed, the size of the axial positioning surface 203 formed will be even smaller, resulting in that the axial positioning of the middle shell 400 and the support frame 200 cannot be guaranteed.

[0037] In order to solve the above problems, embodiments of the present application provide a positioning assembly for a scroll compressor and a scroll compressor having the same.

[0038] 4 to 8 , a positioning assembly for a scroll compressor and a scroll compressor having the same according to an embodiment of the present application will be described.

[0039] It should be understood that there may be many ways to implement the present application, and it should not be construed as being limited to the embodiments described herein. The embodiments described herein are only for a more thorough and clear understanding of the present application.

[0040] Exemplary positioning assembly

[0041] In one aspect, embodiments of the present application provide a positioning assembly for a scroll compressor. Referring to Figures 4 to 7 , the positioning assembly may include a first component 10 and a second component 20 that are cooperatively mounted. The first component 10 is provided with a stepped portion, which may include a first radial positioning surface 11 and a first axial positioning surface 12 perpendicular to the first radial positioning surface 11. The second component 20 may be provided with a second radial positioning surface 21 and a second axial positioning surface 22. The second radial positioning surface 21 cooperates with the first radial positioning surface 11 to radially position the first component 10, and the second axial positioning surface 22 cooperates with the first axial positioning surface 12 to axially position the first component 10.

[0042] The first component 10 is provided with a tool relief groove 13 between the first radial positioning surface 11 and the first axial positioning surface 12. The tool relief groove 13 may include a first side surface 131 adjacent to the first radial positioning surface 11, a second side surface 132 adjacent to the first axial positioning surface 12, and a bottom surface 133 between the first side surface 131 and the second side surface 132. The first side surface 131 and the second side surface 132 are parallel and inclined relative to the axial direction.

[0043] The first side surface 131 and the second side surface 132 of the tool retreat groove 13 are parallel and inclined relative to the axial direction, which can realize the function of the tool retreat groove 13 in a compact structural space. At the same time, it can avoid residual processing residual surface on the first axial positioning surface 12 or the first radial positioning surface 11, and ensure that the first radial positioning surface 11 and the first axial positioning surface 12 have appropriate positioning dimensions, thereby improving the radial and axial positioning accuracy.

[0044] According to the technical solution provided by the present application, the two side surfaces of the undercut 13 extend in parallel, and the depth of the undercut 13 can be increased while the width is reduced. In this way, when forming the undercut 13, the area removed from the first radial positioning surface 11 and the first axial positioning surface 12 can be reduced.

[0045] Compared to the undercut in FIG. 2 , which results in a very small radial positioning surface 102 or the axial positioning surface 203 in FIG. 3 , the undercut 13 in the present application ensures that the first radial positioning surface 11 and the first axial positioning surface 12 are aligned with the second component 20, thereby improving the radial and axial positioning accuracy of the two components. Furthermore, the design of the undercut 13 in the present application also avoids the presence of residual machining surfaces on the first axial positioning surface 12 or the first radial positioning surface 11, thereby ensuring the positioning accuracy of the second component 20 relative to the first component 10.

[0046] Therefore, the technical solution provided by the embodiment of the present application can ensure the radial and axial positioning accuracy of the first component 10 and the second component 20 assembled with each other in the scroll compressor, which is beneficial to improving the assembly accuracy of the scroll compressor, thereby improving the compression performance of the scroll compressor.

[0047] The technical solution provided in the embodiments of the present application is particularly suitable for situations where the matching structure of components in a scroll compressor is compact, the radial positioning surface and / or the axial positioning surface are small in size, and the use of other types of back-off grooves will cause the positioning structure to fail or the positioning accuracy to be poor.

[0048] In some embodiments, as shown in FIG. 4 and FIG. 6 , the bottom surface 133 of the undercut 13 is semicircular. The semicircular bottom surface is easy to process and can relieve stress concentration on the step portion of the first component 10 .

[0049] In some alternative embodiments, as shown in FIG. 5 and FIG. 7 , the bottom surface 133 may also be a plane, and rounded corners or chamfers are formed between the bottom surface 133 and the first side surface 131 and the second side surface 132 .

[0050] In some embodiments, the included angle α between the first side surface 131 and the second side surface 132 of the undercut 13 and the axial direction is 15° to 75°, for example, 20°, 30°, 40°, 50°, 60°, or 70°. The included angle α between the first side surface 131 and the second side surface 132 and the axial direction can ensure that the undercut function is achieved while appropriately taking into account the positioning dimensions of the first radial positioning surface 11 and the first axial positioning surface 12.

[0051] In some examples, the angle α between the first side surface 131 and the second side surface 132 of the undercut 13 and the axial direction is 35° to 55°. When the angle α is within this range, the positioning dimensions of the first radial positioning surface 11 and the first axial positioning surface 12 can be well considered.

[0052] For example, the angle α between the first side surface 131 and the second side surface 132 and the first radial positioning surface 11 is 45°. In this way, the positioning dimensions of the first radial positioning surface 11 and the first axial positioning surface 12 can be better considered.

[0053] The angle α can be adjusted based on the dimensions of the first radial locating surface 11 and the first axial locating surface 12, as well as whether the machining tool can completely cut the first axial locating surface 12. For example, if the positioning dimension of the first radial locating surface 11 is to be set larger, the angle α can be set larger while ensuring that there is no residual surface on the first axial locating surface 12. If the positioning dimension of the first axial locating surface 12 is to be set larger, the angle α of the tool relief groove 13 can be set smaller.

[0054] In some embodiments, the vertical distance d between the first side surface 131 and the second side surface 132 can be 0.8 mm to 5 mm, for example, 1 mm, 2 mm, 3 mm, or 4 mm. This facilitates the processing of the undercut 13 while taking into account the positioning dimensions of the first radial positioning surface 11 and the first axial positioning surface 12, as well as the structural strength of the first component 10.

[0055] In some embodiments, the width b of the first side surface 131 and the second side surface 132 in the depth direction of the undercut 13 can be 0.1 mm to 10 mm, for example, 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, or 9 mm. It is important to avoid a value b that is too small to facilitate machining the undercut 13 and achieve its function. At the same time, avoid a value d that is too large to weaken the structural strength of the first component 10.

[0056] For example, the width b of the first side surface 131 and the second side surface 132 in the depth direction of the undercut 13 can be 0.1 mm to 4 mm, such as 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm, etc. In this way, the structural strength of the first component 10 can be better taken into account while facilitating processing.

[0057] In some embodiments, referring to FIG5 , the axial height h1 of the step portion can be 2 mm to 6 mm, such as 3 mm, 4 mm, or 5 mm. The axial height h2 of the first radial positioning surface can be 0.5 mm to 4 mm, such as 1 mm, 2 mm, or 3 mm. In other words, even when the height h1 of the step portion is only 2 mm to 6 mm, the mating height between the first radial positioning surface 11 and the second component 20 can still meet the positioning requirements.

[0058] For example, the height h1 of the step portion on the first component 10 in the axial direction is 3 mm to 6 mm, and the height h2 of the first radial positioning surface 11 in the axial direction is 1.5 mm to 3.5 mm.

[0059] By controlling h1 and h2 within the above range, the radial positioning accuracy of the first radial positioning surface 11 can be ensured under compact structural design and arrangement.

[0060] It should be noted that the axial and radial directions described in this application are relative to the compressor, and are directions defined when the first component 10 and the second component 20 are installed in the compressor.

[0061] In the technical solution provided in the present application, the first component 10 and the second component 20 may be two components in the scroll compressor that need to be positioned relative to each other in the axial direction and the radial direction.

[0062] For example, one of the first component 10 and the second component 20 may be a fixed scroll of a scroll compressor, and the other may be a support frame for supporting the fixed scroll of the scroll compressor.

[0063] For example, one of the first component 10 and the second component 20 may be a support frame of the scroll compressor, and the other may be a middle shell of the scroll compressor.

[0064] For example, one of the first component 10 and the second component 20 may be a support frame of the scroll compressor, and the other may be an upper end of a stator housing of a motor of the scroll compressor.

[0065] For example, one of the first component 10 and the second component 20 may be a lower support seat located at the lower end of the motor of the scroll compressor, and the other may be the lower end of the stator housing of the motor of the scroll compressor.

[0066] For example, one of the first component 10 and the second component 20 can be a balancing weight of the scroll compressor that rotates with the crankshaft, and the other can be the crankshaft of the scroll compressor. The balancing weight can be a lower balancing weight located at the lower end of the crankshaft or an upper balancing weight located at the upper end of the crankshaft.

[0067] Exemplary scroll compressor

[0068] On the other hand, an embodiment of the present application further provides a scroll compressor, which may include a housing, a compression mechanism, a drive mechanism, and at least one positioning assembly described in any of the above embodiments. The housing is provided with an intake port and an exhaust port. The compression mechanism is housed in the housing and includes a first scroll and a second scroll. The scroll teeth of the first scroll and the scroll teeth of the second scroll have a matching structure to cooperate to form a compression chamber, and at least one of the first scroll and the second scroll is a movable scroll. The drive mechanism is used to drive the movable scroll to rotate so as to compress the fluid from the intake port and discharge the compressed fluid from the exhaust port.

[0069] The scroll compressor accordingly has the corresponding technical effects of the above-mentioned positioning assembly for the scroll compressor, which will not be repeated here.

[0070] In one embodiment, the at least one positioning assembly of the scroll compressor may include at least one of a first positioning assembly, a second positioning assembly, a third positioning assembly, a fourth positioning assembly, and a fifth positioning assembly.

[0071] In the first positioning assembly, one of the first component 10 and the second component 20 is a fixed scroll of the scroll compressor, and the other is a support frame supporting the fixed scroll.

[0072] In the second positioning assembly, one of the first component 10 and the second component 20 is a support frame of the scroll compressor, and the other is a middle shell of the scroll compressor.

[0073] In the third positioning assembly, one of the first component 10 and the second component 20 is a support frame of the scroll compressor, and the other is an upper end of a stator housing of a motor of the scroll compressor.

[0074] In the fourth positioning assembly, one of the first component 10 and the second component 20 is a lower support seat located at the lower end of the motor of the scroll compressor, and the other is the lower end of the stator housing of the motor of the scroll compressor.

[0075] In the fifth positioning assembly, one of the first component 10 and the second component 20 is a balancing block of the scroll compressor that rotates with the crankshaft, and the other is the crankshaft of the scroll compressor.

[0076] For ease of understanding, an exemplary scroll compressor of the present application will be described in detail below with reference to FIG. 4 to FIG. 8 .

[0077] Referring to the scroll compressor shown in Figures 4 to 8, the scroll compressor includes a fixed scroll 1, an orbiting scroll 2, a support frame 3, a crankshaft 4, a motor 5, and a compressor housing 8 located on the outside. The compressor housing 8 includes an upper end cover 81, an end cover 83, and a middle shell 82 located between the upper end cover and the lower end cover 83. The scroll compressor also includes a lower support base 7 located at the lower end of the motor 5 and a balancing block mounted on the crankshaft 4 for balancing the crankshaft. The balancing block may include an upper balancing block 61 provided at the upper end of the crankshaft 4 and a lower balancing block 62 provided at the lower end. Of course, the provision of a single balancing block is not excluded.

[0078] The scroll compressor has a first positioning assembly, in which the first component 10 is the fixed scroll 1, and the second component 20 is the support frame 3. As shown at A in Figure 8, the positioning structure of the fixed scroll 1 and the support frame 3 is shown. Referring to Figures 4 and 5, in the structure shown at A in Figure 8, the fixed scroll 1 is a first component 10 having a first radial positioning surface 11 and a first axial positioning surface 12, and the support frame 3 is a second component 20 that cooperates with the fixed scroll 1 for positioning. The positioning structure adopts the backing groove provided in the present application to improve the positioning accuracy between the support frame 3 and the fixed scroll 1 in the axial and radial directions. It is understandable that the support frame 3 can also be set as the first component 10 having the first radial positioning surface 11 and the first axial positioning surface 12, that is, the support frame 3 is set to have a step portion, and the fixed scroll 1 is the second component 20 that cooperates with the step portion for positioning.

[0079] The scroll compressor also has a second positioning assembly. The first component 10 in the second positioning assembly is the support frame 3, and the second component 20 is the middle shell 82. As shown at B in Figure 8, the positioning structure of the support frame 3 and the middle shell 82 is shown. Referring to Figures 6 and 7, the support frame 3 is a first component 10 having a first radial positioning surface 11 and a first axial positioning surface 12, and the middle shell 82 is a second component 20 that is positioned in cooperation with the support frame 3. The positioning structure adopts the tool-retracting groove provided in this application to ensure the positioning accuracy of the support frame 3 and the middle shell 82 in the axial and radial directions. Similarly, it can be understood that the middle shell 82 can also be set as a first component 10 having a step portion, and the support frame 20 can be set as a second component 20 that is positioned in cooperation with the step portion.

[0080] The scroll compressor also includes a third positioning assembly. The first component 10 of the third positioning assembly is the support frame 3, and the second positioning component 20 is the upper end of the stator housing 51 of the motor 5. As shown at E in Figure 8, the positioning structure that cooperates with the upper end of the stator housing 51 and the support frame 3 ensures axial and radial positioning accuracy between the stator housing 51 and the support frame 3. Similarly, the upper end of the stator housing 51 can also be configured as the first component 10 having a stepped portion, and the support frame 3 as the second component 20 that cooperates with the stepped portion for positioning.

[0081] The scroll compressor may also include a fourth positioning assembly. The first component 10 in the fourth positioning assembly is the lower support seat 7 located at the lower end of the motor 5, and the second component 20 is the lower end of the stator housing 51 of the motor 5. As shown at F in FIG8 , the positioning structure of the support seat 7 and the lower end of the positioning housing 51 is shown. This positioning structure can ensure the axial and radial positioning accuracy of the stator housing 51 and the lower support seat 7. Similarly, the lower end of the stator housing 51 can also be provided with a first component 10 having a stepped portion, and the lower support seat 7 can be provided with a second component 20 that cooperates with the stepped portion for positioning.

[0082] The scroll compressor may also include a fifth positioning assembly. The first component 10 of the fifth positioning assembly is the crankshaft 4, and the second component 20 is a balancing weight. As shown at C in FIG8 , the positioning structure for the crankshaft 4 to cooperate with the upper balancing weight 61 is shown. This positioning structure can ensure the axial and radial positioning accuracy of the upper balancing weight 61 relative to the crankshaft 4. As shown at D in FIG8 , the positioning structure for the crankshaft 4 to cooperate with the lower balancing weight 62 is shown. This positioning structure can ensure the axial and radial positioning accuracy of the lower balancing weight 62 relative to the crankshaft 4.

[0083] The scroll compressor provided in the above embodiment has the back-off groove provided in the present application set in each positioning component, which can ensure the radial and axial positioning accuracy of each component in the scroll compressor, which is beneficial to improving the assembly accuracy of the scroll compressor, thereby ensuring the compression performance of the compressor.

[0084] The positioning assembly in the embodiment of the present application can be considered to be used between other two parts of the scroll compressor that require fine coordination, and they are not listed here one by one.

[0085] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A scroll compressor, characterized in that, The scroll compressor includes at least one positioning component, and each positioning component includes a first component and a second component that are fitted and installed; A stepped portion is provided on the first component, and the stepped portion includes a first radial positioning surface and a first axial positioning surface perpendicular to the first radial positioning surface; A second radial positioning surface and a second axial positioning surface are provided on the second component. The second radial positioning surface cooperates with the first radial positioning surface to radially position the first component, and the second axial positioning surface cooperates with the first axial positioning surface to axially position the first component; Wherein, a relief groove is provided on the first component between the first radial positioning surface and the first axial positioning surface. The relief groove includes a first side surface close to the first radial positioning surface, a second side surface close to the first axial positioning surface, and a bottom surface between the first side surface and the second side surface; the first side surface and the second side surface are parallel and inclined relative to the axial direction.

2. The scroll compressor according to claim 1, characterized in that, The bottom surface of the relief groove is semi-circular.

3. The scroll compressor according to claim 1, characterized in that, The bottom surface of the relief groove is a plane, and fillets or chamfers are respectively formed between the bottom surface and the first side surface and the second side surface.

4. The scroll compressor according to any one of claims 1 to 3, characterized in that, The included angle α between the first side surface and the second side surface and the axial direction is 15° to 75° or 35° to 55°.

5. The scroll compressor according to claim 4, wherein, The included angle α between the first side surface and the second side surface and the axial direction is 45°.

6. The scroll compressor according to any one of claims 1 to 5, characterized in that, The vertical distance d between the first side surface and the second side surface is 0.8 mm to 5 mm.

7. The scroll compressor according to any one of claims 1 to 6, characterized in that, The widths b of the first side surface and the second side surface in the depth direction of the relief groove are respectively 0.1 mm to 10 mm or 0.1 mm to 4 mm.

8. The scroll compressor according to any one of claims 1 to 7, characterized in that, The height h1 of the stepped portion in the axial direction is 2 mm to 6 mm, and the height h2 of the first radial positioning surface in the axial direction is 0.5 mm to 4 mm.

9. The scroll compressor according to claim 8, characterized in that, The height h1 of the stepped portion in the axial direction is 3 to 6 mm, and the height h2 of the first radial positioning surface in the axial direction is 1.5 mm to 3.5 mm.

10. The scroll compressor according to any one of claims 1 to 9, characterized in that, The at least one positioning component includes at least one of a first positioning component, a second positioning component, a third positioning component, a fourth positioning component, and a fifth positioning component, wherein, In the first positioning component, one of the first component and the second component is the stationary scroll of the scroll compressor, and the other is the support frame for supporting the stationary scroll; In the second positioning component, one of the first component and the second component is the support frame of the scroll compressor, and the other is the middle shell of the scroll compressor; In the third positioning component, one of the first component and the second component is the support frame of the scroll compressor, and the other is the upper end of the stator housing of the motor of the scroll compressor; In the fourth positioning component, one of the first component and the second component is the lower support seat at the lower end of the motor of the scroll compressor, and the other is the lower end of the stator housing of the motor of the scroll compressor; In the fifth positioning component, one of the first component and the second component is a balance weight that rotates with the crankshaft of the scroll compressor, and the other is the crankshaft of the scroll compressor.

11. A positioning component for a scroll compressor, characterized in that, The positioning component includes a first component and a second component that are fitted and installed; A stepped portion is provided on the first component, and the stepped portion includes a first radial positioning surface and a first axial positioning surface perpendicular to the first radial positioning surface; A second radial positioning surface and a second axial positioning surface are provided on the second component. The second radial positioning surface cooperates with the first radial positioning surface to radially position the first component, and the second axial positioning surface cooperates with the first axial positioning surface to axially position the first component; and A relief groove is provided on the first component between the first radial positioning surface and the first axial positioning surface. The relief groove includes a first side surface close to the first radial positioning surface, a second side surface close to the first axial positioning surface, and a bottom surface between the first side surface and the second side surface; the first side surface and the second side surface are parallel and inclined relative to the axial direction.

12. The positioning component according to claim 11, wherein The bottom surface is semi-circular.

13. The positioning component according to claim 11, characterized in that The bottom surface is a plane, and fillets or chamfers are respectively formed between the bottom surface and the first side surface and the second side surface.

14. The positioning component according to any one of claims 11 to 13, characterized in that, The angle α between the first side surface and the second side surface and the axial direction is 15° to 75° or 35° to 55°.

15. The positioning component according to claim 14, wherein The angle α between the first side surface and the second side surface and the axial direction is 45°.

16. The positioning component according to any one of claims 11 to 15, characterized in that, The vertical distance d between the first side surface and the second side surface is 0.8 mm to 5 mm.

17. The positioning component according to any one of claims 11 to 16, characterized in that, The widths b of the first side surface and the second side surface in the depth direction of the relief groove are respectively 0.1 mm to 10 mm or 0.1 mm to 4 mm.

18. The positioning component according to any one of claims 11 to 17, characterized in that The height h1 of the stepped portion in the axial direction is 2 mm to 6 mm, and the height h2 of the first radial positioning surface in the axial direction is 0.5 mm to 4 mm.

19. The positioning component according to claim 18, wherein The height h1 of the stepped portion in the axial direction is 3 mm to 6 mm, and the height h2 of the first radial positioning surface in the axial direction is 1.5 mm to 3.5 mm.

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