Scroll compressor

Abstract

A scroll compressor is provided. The scroll compressor includes a housing, a fixed scroll member and an orbiting scroll member housed in the housing, the orbiting scroll member configured to be engaged with the fixed scroll member and orbitable with respect to the fixed scroll member to compress a working fluid, a partition configured to partition a space in the housing into a high-pressure chamber and a low-pressure chamber, and a positioning member provided between the partition and the fixed scroll member and configured to position one of the partition and the fixed scroll member with respect to the other of the partition and the fixed scroll member upon assembly. According to the scroll compressor of the present disclosure, by positioning the positioning member directly between the partition and the fixed scroll member, a tolerance chain between a discharge assembly and the fixed scroll member is shortened, and a tolerance between the discharge assembly and the fixed scroll member can be reduced.

Description

Technical Field

[0001] This invention relates to a scroll compressor. Background Technology

[0002] The content in this section only provides background information related to this invention and may not constitute prior art.

[0003] The scroll compressor includes a housing, a scroll compression mechanism having a stationary scroll component and a moving scroll component, and a partition for dividing the space within the housing into a high-pressure chamber and a low-pressure chamber. An exhaust port and a recess communicating with the exhaust port are provided approximately at the center of the end plate of the stationary scroll component. An opening is provided at the center of the partition. A discharge assembly for discharging working fluid from the compression mechanism is provided in the recess of the stationary scroll component and the opening of the partition.

[0004] In existing scroll compressors, the axial and radial clearances between the wall of the defined recess of the fixed scroll component and the discharge assembly are relatively large, for example, ±2.0 mm. This necessitates the use of a floating seal assembly, resulting in higher costs. Furthermore, the floating seal assembly carries the risk that the spring may not be able to overcome the frictional force of the sealing ring. Summary of the Invention

[0005] In view of the above problems, the inventors of this application propose a solution for effectively controlling the axial and radial clearances between the discharge assembly and the fixed scroll component. The solution according to this application can achieve lower costs and facilitates the assembly of the scroll compressor.

[0006] According to one aspect of this disclosure, a scroll compressor is provided. The scroll compressor includes: a housing; a fixed scroll component and a movable scroll component, the fixed scroll component and the movable scroll component being housed within the housing, the movable scroll component being configured to engage with the fixed scroll component and be rotatable relative to the fixed scroll component to compress a working fluid; a partition configured to divide a space within the housing into a high-pressure chamber and a low-pressure chamber; and a positioning member disposed between the partition and the fixed scroll component, and configured to determine the relative position between the partition and the fixed scroll component during assembly of the scroll compressor.

[0007] In some embodiments, the positioning element is fixedly mounted to the fixed vortex component.

[0008] In some embodiments, the positioning element is interference-fitted to the outer peripheral surface of the fixed scroll component.

[0009] In some embodiments, the outer peripheral surface of the fixed vortex component is provided with a stepped surface, and the positioning element includes a supported portion supported on the stepped surface and a cantilever portion extending from the stepped surface.

[0010] In some embodiments, the end of the outer peripheral portion is supported on the cantilever portion during assembly.

[0011] In some embodiments, the outer periphery of the partition has a gap with the housing before it is welded to the housing.

[0012] In some embodiments, the thickness of the supported portion is greater than the thickness of the cantilever portion.

[0013] In some embodiments, the positioning element is plate-shaped.

[0014] In some embodiments, the positioning element has an arcuate or annular shape extending in the circumferential direction.

[0015] In some embodiments, the positioning element has sufficient rigidity to bear the weight of the partition and is capable of deformation when the partition is welded to the housing.

[0016] According to the scroll compressor disclosed herein, by setting a positioning element to directly position between the partition and the fixed scroll component, the tolerance chain between the discharge assembly and the fixed scroll component is shortened, and the tolerance between the discharge assembly and the fixed scroll component can be reduced.

[0017] By reducing the tolerances between the discharge assembly and the stationary scroll component, various seals can be used to achieve a seal between them without the need for a specific floating seal assembly. This reduces the cost of the scroll compressor.

[0018] Furthermore, the positioning components have a relatively simple structure and low manufacturing cost. Positioning components of different sizes or structures can be manufactured for different scroll compressors. This eliminates the need for significant modifications to accommodate different scroll compressors.

[0019] Other applications of the invention will become more apparent from the detailed description below. It should be understood that these detailed descriptions and specific examples, while illustrating preferred embodiments of the invention, are intended for illustrative purposes and not for limiting the invention. Attached Figure Description

[0020] The features and advantages of one or more embodiments of the present invention will become more readily understood from the following description with reference to the accompanying drawings, in which:

[0021] Figure 1 This is a longitudinal cross-sectional schematic diagram of a scroll compressor according to an embodiment of the present disclosure;

[0022] Figure 2 for Figure 1 A partially enlarged schematic diagram of a scroll compressor;

[0023] Figures 3A to 3C The tolerance chain between the discharge assembly and the fixed vortex component according to this disclosure is shown;

[0024] Figure 4A and Figure 4B The tolerance chain between the discharge assembly and the fixed vortex component is shown in the comparative example; Figures 5A to 5E These are schematic diagrams of the positioning elements according to various embodiments; and

[0025] Figure 6A and Figure 6B These are schematic diagrams showing the partition before and after it is welded to the outer shell.

[0026] It should be understood that in all these figures, corresponding reference numerals indicate similar or corresponding parts and features. Furthermore, it should be understood that the various components in the figures are not necessarily drawn to scale. For example, some parts may be shown in an exaggerated form for clarity. Detailed Implementation

[0027] Exemplary embodiments will now be described more fully with reference to the accompanying drawings.

[0028] Exemplary embodiments are provided to make this disclosure exhaustive and to convey the scope more fully to those skilled in the art. Numerous specific details, such as examples of specific components, apparatuses, and methods, are set forth to provide a thorough understanding of various embodiments of this disclosure. It will be apparent to those skilled in the art that specific details are not required, that exemplary embodiments may be implemented in many different forms, and should not be construed as limiting the scope of this disclosure. In some exemplary embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.

[0029] The following will refer to Figure 1 To describe a scroll compressor 100 according to an embodiment of the present disclosure. Figure 1 A longitudinal cross-sectional view of a scroll compressor 100 according to an embodiment of the present disclosure.

[0030] like Figure 1 As shown, the scroll compressor 100 includes a housing 10. The housing 10 includes a generally cylindrical shell 11, a top cover 12 and a bottom cover 13 located at opposite ends of the shell 11. The shell 11, the top cover 12 and the bottom cover 13 define a sealed internal space.

[0031] A scroll compressor mechanism CM for compressing the working fluid is housed in the housing 10. The scroll compressor mechanism CM has a fixed scroll component 51 and a moving scroll component 52. The fixed scroll component 51 and the moving scroll component 52 are engaged with each other to form a series of compression chambers between their scrolls. When the scroll compressor 100 is in operation, the moving scroll component 52 revolves relative to the fixed scroll component 51; that is, the moving scroll component 52 does not rotate about its own central axis, but rather the central axis of the moving scroll component 52 rotates about the central axis of the fixed scroll component 51.

[0032] The moving scroll member 52 engages with the drive shaft 40. In the illustrated example, an eccentric pin at one end of the drive shaft 40 is inserted into the hub of the moving scroll member 52. Thus, as the drive shaft 40 rotates, it drives the moving scroll member 52 to rotate.

[0033] Motor 30 provides power to drive shaft 40. Motor 30 includes stator 32 fixed to housing 10 and rotor 34 located radially inside stator 32. Rotor 34 is fixedly mounted to drive shaft 40 so as to drive drive shaft 40 to rotate together, thereby drive shaft 40 to drive the moving scroll of scroll compressor mechanism CM to rotate.

[0034] A bearing housing 20 is provided between the motor 30 and the moving scroll component 52. The scroll compression mechanism CM is rotatably supported on the bearing housing 20. In addition, a bearing is provided between the bearing housing 20 and the drive shaft 40, thereby rotatably supporting the drive shaft 40.

[0035] The scroll compressor 100 also includes a partition 60. The partition 60 divides the internal space of the housing 10 into a high-pressure chamber and a low-pressure chamber. The high-pressure chamber is defined by the top cover 12 and the partition 60, and the low-pressure chamber is defined by the partition 60, the cylindrical housing 11, and the bottom cover 13. The working fluid compressed by the scroll compressor mechanism CM is discharged into the high-pressure chamber through the exhaust port 517. The exhaust port 517 is located approximately at the center of the end plate of the fixed scroll component 51. The scroll compressor mechanism CM, the bearing housing 20, the motor 30, and the drive shaft 40 are located in the low-pressure chamber.

[0036] A discharge assembly 70 for discharging compressed working fluid to a high-pressure chamber is provided at the exhaust port 517 of the scroll compressor mechanism CM. An opening 62 is provided at approximately the center of the partition 60. The discharge assembly 70 is fixedly mounted in the opening 62. The end plate of the moving scroll member 51 may include a hub or cylindrical portion 515 extending in the axial direction. The cylindrical portion 515 defines a recess 513 communicating with the exhaust port 517. The recess 513 may be configured to receive a portion of the discharge assembly 70. The structure of the discharge member 70 is not particularly limited herein, but may be modified as needed.

[0037] A good seal is required between the discharge assembly 70 and the fixed scroll component 51. Therefore, small axial and radial tolerances are desirable between the discharge assembly 70 and the fixed scroll component 51 to facilitate the use of various common sealing methods. For this purpose, the scroll compressor 100 according to this disclosure also includes a positioning element 80. The positioning element 80 is disposed between the partition 60 and the fixed scroll component 51. The positioning element 80 is configured to position one of the partition 60 and the fixed scroll component 51 relative to the other during assembly.

[0038] The positioning element 80 can be fixedly installed onto the fixed scroll component 51. Figure 1 and Figure 2 In the illustrated embodiment, the positioning member 80 is interference-fitted to the outer peripheral surface of the fixed scroll member 51. The outer peripheral surface of the fixed scroll member 51 may include a stepped surface 512. The positioning member 80 is supported on the stepped surface 512.

[0039] According to this disclosure, the scroll compressor 100 can establish the following tolerance chain between the discharge assembly 70 and the fixed scroll component 51 via the positioning element 80: discharge assembly 70 – partition 60 – positioning element 80 – fixed scroll component 51. In other words, in this disclosure, the tolerance chain between the discharge assembly 70 and the fixed scroll component 51 is greatly shortened by providing the positioning element 80. Therefore, the tolerance between the discharge assembly 70 and the fixed scroll component 51 can be precisely controlled within a desired small range.

[0040] The following reference Figures 3A to 3C The tolerance chain between the discharge assembly 70 and the fixed scroll component 51 of the scroll compressor 100 according to this disclosure will be described in detail.

[0041] like Figure 3A As shown, the discharge assembly 70 includes an axially extending cylindrical portion 71 and a flange portion 72 extending radially outward from the cylindrical portion 71. The cylindrical portion 71 is received in an opening 62 of the partition 60. The flange portion 72 abuts against the partition 60 and has a thickness A. The flange portion 72 has a surface 722 abutting against a surface 622 of the partition 60 and an outer end face 721 opposite to the surface 722. The outer end face 721 faces the fixed vortex member 51. Figure 3C As shown, there is a gap G between the outer end face 721 of the discharge assembly 70 and the end face 511 of the fixed vortex component 51.

[0042] See also Figure 3A The partition 60 includes an outer peripheral portion 64 extending in the axial direction. The end face 61 of the outer peripheral portion 64 is supported on the positioning member 80, such as... Figure 2 As shown. The partition 60 has an axial height B from surface 622 to end face 61. The partition 60 may also include a protrusion 66 extending radially outward from the outer periphery 64, the protrusion 66 for supporting the top cover 12, as shown. Figure 2 As shown.

[0043] See Figure 3B The positioning element 80 is plate-shaped. For example, the positioning element 80 can be made of steel plate. The positioning element 80 has a thickness C. The positioning element 80 is interference-fitted onto the fixed scroll member 51 and supported on the stepped surface 512. The fixed scroll member 51 has an axial height D from the end face 511 to the stepped surface 512.

[0044] After assembly, the gap G between the end face 511 of the fixed vortex component 51 and the outer end face 721 of the discharge component 70 satisfies the following relationship: G = B + CAD.

[0045] Figure 4A and Figure 4B The tolerance chain between the discharge assembly 70 and the stationary scroll component 51 of the scroll compressor 100' in the comparative example is shown. Figure 4A The scroll compressor 100' shown is Figure 1 The difference of the scroll compressor 100 shown is that it does not have a positioning element 80, but is positioned by the upper end face of the cylindrical housing 11 facing the partition 60.

[0046] like Figure 4A As shown, the stator 32 of the motor 30 is positioned on the end face of the bottom cover 13. A bearing housing 20, a support member 22, and a stator scroll 51 are sequentially placed on the stator 32 of the motor 30. Therefore, in Figure 4A In the comparative example shown, the partition 60 is positioned by the upper end face of the cylindrical housing 11, while the fixed scroll component 51 is positioned by the end face of the bottom cover 13 via multiple intermediate components (as shown in the figure, the support 22, the bearing housing 20, and the stator 32). The following tolerance chain is established between the discharge assembly 70 and the fixed scroll component 51 of the comparative example scroll compressor 100': discharge assembly 70 – partition 60 – cylindrical housing 11 – bottom cover 13 – intermediate components 32, 20, 22 – fixed scroll component 51. Clearly, compared to the scroll compressor 100 of this disclosure, this tolerance chain of the comparative example scroll compressor 100' is much longer, resulting in a larger tolerance between the discharge assembly and the fixed scroll component, which is detrimental to the sealing between them.

[0047] exist Figure 4A In the middle, the thickness of the flange of the discharge assembly 70 is D, and the surface of the partition 60 that abuts against the flange (see...) Figure 3A Surface 622) to protrusion (see also) Figure 2 The axial height of the upper surface of the protrusion 66 is C, the thickness of the protrusion is B, the axial distance from the upper end face of the cylindrical shell 11 to the upper end face of the bottom cover 13 is A, and the axial heights of components 32, 20, 22 and 51 are H, G, F and E respectively.

[0048] See Figure 4B After the scroll compressor 100' is assembled, the gap G' between the end face 511 of the fixed scroll component 51 and the outer end face 721 of the discharge component 70 satisfies the following relationship: G' = A + B + CDEFGH.

[0049] Will Figures 3A to 3C The gap G shown is Figures 4A to 4B Compared to the gap G' shown, the gap G is much shorter and affected by far fewer factors. Therefore, according to this disclosure, the gap G has high controllability. The scroll compressor 100 according to this disclosure can significantly reduce the tolerance between the discharge assembly 70 and the fixed scroll component 51 simply by providing a positioning element 80 between the partition 60 and the fixed scroll component 51.

[0050] On the one hand, the axial tolerance between the discharge assembly 70 and the fixed vortex component 51 can be changed by designing the thickness of the positioning component 80.

[0051] On the other hand, the outer peripheral portion 64 has a certain gap with the outer casing 10 during assembly, thereby allowing adjustment of the radial positioning of the partition 60 relative to the fixed scroll component 51, that is, adjusting the radial positioning of the discharge assembly 70 relative to the fixed scroll component 51. In this way, the radial tolerance between the discharge assembly 70 and the fixed scroll component 51 can be changed or controlled.

[0052] The shape and structure of the positioning element 80 can be varied as needed. Figure 5A The positioning element shown has a regular circular shape. Figure 5B The positioning element shown may have a recess to avoid interference with other related components. Figure 5C The positioning element shown may have a non-circular shape, for example, depending on the matching component. Figure 5D The positioning element shown can have a non-enclosed structure. Figure 5E The positioning element shown can have different thicknesses, that is, it can be stepped. For example, Figure 5E The supported portion of the positioning element shown can have a thicker thickness to ensure support strength, while the cantilever portion can have a thinner portion to deform when needed.

[0053] It should be understood that the shape and structure of the positioning element 80 should not be limited to the specific example shown in the figure, as long as it can achieve the function described in this article.

[0054] After the partition 60 is positioned on the positioning member 80, the partition 60 can be welded to the housing 10. In the illustrated example, the partition 60 is welded between the top cover 12 and the cylindrical housing 11.

[0055] Figure 6AA schematic diagram is shown before the partition 60 is welded. The partition 60 is supported on the cantilever portion 82. At this point, the positioning member 80 is not deformed. That is, the positioning member 80 has sufficient rigidity to support the weight of the partition 60. In one example, the positioning member 80 may be made of a metallic material, such as steel plate. In alternative examples, the positioning member 80 may be made of carbon fiber, composite materials, etc.

[0056] Figure 6B A schematic diagram is shown after the partition 60 has been welded. During welding, high temperatures are generated, causing the partition 60 (especially near the welded area) to deform. The cantilever portion 82 of the positioning member 80 can accommodate the deformation of the partition 60. Figure 6B As shown, the cantilever portion 82 also bends downwards and deforms accordingly. The appropriate material or structure of the positioning element 80 can be selected based on the structure and weight of the partition.

[0057] The shape, size, and structure (e.g., thickness, cantilever length, interference fit, etc.) and material of the positioning element 80 may vary as needed and should not be limited to the specific example shown in the figure.

[0058] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the specific embodiments described and shown herein. Various changes to the exemplary embodiments can be made by those skilled in the art without departing from the scope defined by the claims. It should also be understood that features of various embodiments can be combined with each other or omitted where there is no contradiction in the technical solutions.

Claims

1. A scroll compressor, comprising: Outer shell (10); A fixed vortex component (51) and a moving vortex component (52) are housed within the housing. The moving vortex component is configured to engage with the fixed vortex component and be able to rotate relative to the fixed vortex component to compress the working fluid. A partition (60) is configured to divide the space within the housing into a high-pressure chamber and a low-pressure chamber; as well as A positioning element (80) is disposed between the partition (60) and the fixed scroll member (51) and configured to position one of the partition and the fixed scroll member relative to the other during assembly. The positioning element has sufficient rigidity to support the weight of the partition. The fixed vortex component (51) has a stepped surface (512) on its outer peripheral surface. The positioning component (80) includes a supported portion (81) supported on the stepped surface and a cantilever portion (82) extending from the stepped surface. The partition (60) has an outer peripheral portion (64) extending in the axial direction. The end face (61) of the outer peripheral portion is supported on the cantilever portion (82) during assembly. The cantilever portion (82) is designed to be able to bend and deform when the partition (60) is welded to the outer shell (10).

2. The scroll compressor according to claim 1, wherein, The positioning element is fixedly installed on the fixed vortex component.

3. The scroll compressor according to claim 2, wherein, The positioning element is interference-fitted to the outer peripheral surface of the fixed vortex component.

4. The scroll compressor according to claim 1, wherein, The outer periphery of the partition has a gap with the outer shell before it is welded to the outer shell.

5. The scroll compressor according to claim 1, wherein, The thickness of the supported portion is greater than the thickness of the cantilever portion.

6. The scroll compressor according to any one of claims 1 to 5, wherein, The positioning element is plate-shaped.

7. The scroll compressor according to any one of claims 1 to 5, wherein, The positioning element has a closed or open annular shape or a non-annular shape extending in the circumferential direction.

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