compressor

Abstract

The present application relates to a compressor. The compressor includes a housing including a cylindrical body and first and second covers respectively provided at both axial end portions of the cylindrical body, a compression mechanism housed in the housing and configured to compress a working fluid, a crankshaft configured to drive the compression mechanism, a motor configured to drive the crankshaft in rotation, and a bearing housing housed in a space defined by the motor and the housing and fixedly attached to the housing, the bearing housing being configured to rotatably support the crankshaft via a bearing. The housing has a cylindrical reinforcement portion for defining the space, the cylindrical reinforcement portion having a rigidity greater than that of other portions of the housing.

Description

Technical Field

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

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

[0003] A compressor includes a compression mechanism for compressing a working fluid, a crankshaft for driving the compression mechanism, and bearing housings that rotatably support the crankshaft via bearings. The compression mechanism, crankshaft, and bearing housings are housed within a housing. Typically, the stationary components in the compression mechanism and the bearing housings are fixed to the housing. When the compressor is running, the compressor housing vibrates due to the excitation of the internal moving parts and radiates noise to the external environment. Summary of the Invention

[0004] The inventors of this application have discovered that the noise radiation problem in the space where the lower bearing is located (i.e., the space defined by the motor and the lower housing) is serious, and therefore propose a technical solution that can significantly reduce noise radiation by making simple improvements to the compressor housing.

[0005] The purpose of this disclosure is to provide a compressor that can effectively reduce noise radiation.

[0006] Another object of this disclosure is to provide a compressor having a housing that can effectively reduce noise, simplify the processing technology, and reduce manufacturing costs.

[0007] According to one aspect of this disclosure, a compressor is provided. The compressor includes: a housing comprising a cylindrical body and a first cover and a second cover respectively disposed at two axial ends of the cylindrical body; a compression mechanism housed within the housing and configured to compress a working fluid; a crankshaft configured to drive the compression mechanism; a motor configured to drive the crankshaft to rotate; and a bearing housing housed in a space defined by the motor and the housing and fixedly attached to the housing, the bearing housing being configured to rotatably support the crankshaft via bearings. The housing has a cylindrical reinforcement defining the space, the rigidity of the cylindrical reinforcement being greater than the rigidity of other portions of the housing.

[0008] In some examples, the first cover includes a base and an axial extension that extends from the outer periphery of the base along the axial direction of the compressor. The axial extension is interference-fitted into the cylindrical body to form the cylindrical reinforcement of the housing. Alternatively, an end of the axial extension is fixedly attached to an end of the cylindrical body, and the thickness of the axial extension is greater than the thickness of the cylindrical body, the axial extension forming the cylindrical reinforcement of the housing.

[0009] In some examples, the thickness of the axial extension is greater than or equal to twice the thickness of the cylindrical body.

[0010] In some examples, the first cover is attached to the cylindrical body via an annular weld.

[0011] In some examples, a support plate is interference-fitted at the end of the axial extension.

[0012] In some examples, the support plate is an annular flat plate.

[0013] In some examples, the top of the axial extension has a recessed stepped surface to support or position the support plate.

[0014] In some examples, a gap is formed between the end face of the axial extension and the bearing housing, the gap being greater than or equal to 0.5 mm and less than or equal to 3 mm.

[0015] In some examples, the compressor includes a reinforcement that is interference-fitted into the cylindrical body to form the cylindrical reinforcement.

[0016] In some examples, the reinforcement includes a cylindrical portion that is interference-fitted with the cylindrical body and a bottom extending radially from one end of the cylindrical portion. The bottom is positioned adjacent to the bearing housing.

[0017] In some examples, the reinforcing member is located between the motor and the bearing housing, and the end face of the cylindrical portion has a shape that mates with the stator.

[0018] In some examples, the bottom is ring-shaped.

[0019] In some examples, the bottom is connected to the bearing housing via fasteners.

[0020] In some examples, the reinforcement is made of a material different from that of the housing.

[0021] In some examples, the compressor is a vertical compressor, the first cover is a bottom cover, and the bearing housing is a lower bearing housing.

[0022] In some examples, the bottom cover is provided with multiple independent legs, which are evenly distributed in the circumferential direction to support the compressor on the external structure.

[0023] 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

[0024] 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:

[0025] Figure 1 This is a perspective cross-sectional view of a compressor according to a first embodiment of the present disclosure;

[0026] Figure 2 for Figure 1 A partially enlarged schematic diagram of the compressor;

[0027] Figure 3 and Figure 4 They are respectively Figure 1 A three-dimensional schematic diagram and a cross-sectional schematic diagram of the bottom cover of the compressor;

[0028] Figure 5 for Figure 1 A three-dimensional schematic diagram of the compressor's support plate;

[0029] Figure 6 This is a perspective cross-sectional view of a compressor according to a second embodiment of the present disclosure;

[0030] Figure 7 for Figure 6 A partially enlarged schematic diagram of the compressor;

[0031] Figure 8 and Figure 9 They are respectively Figure 6 A three-dimensional schematic diagram and a cross-sectional schematic diagram of the bottom cover of the compressor;

[0032] Figure 10 This is a perspective cross-sectional view of a compressor according to a third embodiment of the present disclosure;

[0033] Figure 11 for Figure 10 A three-dimensional schematic diagram of the compressor's reinforcing components;

[0034] Figure 12 This is a perspective cross-sectional view of a compressor according to the fourth embodiment of the present disclosure;

[0035] Figure 13 for Figure 12 A partially enlarged schematic diagram of the compressor;

[0036] Figure 14 for Figure 12A three-dimensional schematic diagram of the compressor's reinforcing components;

[0037] Figure 15 This is a partially enlarged cross-sectional schematic diagram of a compressor according to the fifth embodiment of this disclosure; and

[0038] Figure 16 for Figure 15 A three-dimensional schematic diagram of the compressor's reinforcing components. Detailed Implementation

[0039] Exemplary embodiments will now be described more fully with reference to the accompanying drawings.

[0040] 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.

[0041] The following reference Figures 1 to 5 The compressor 100 according to a first embodiment of the present disclosure will be described. As shown, the compressor 100 includes a compression mechanism CM for compressing a working fluid, a crankshaft (also referred to as a drive shaft or rotating shaft) 12 for driving the compression mechanism CM, a motor 14 for driving the crankshaft 12 to rotate, a main bearing housing (also referred to as an upper bearing housing) 16 that rotatably supports the upper part of the crankshaft 12 via bearings, and a bearing housing (also referred to as a lower bearing housing) 18 that rotatably supports the lower part of the crankshaft 12 via bearings.

[0042] The compression mechanism CM, crankshaft 12, motor 14, main bearing housing 16, and bearing housing 18 are housed within a housing 110. The housing 110 includes a cylindrical body 101, a bottom cover (also referred to as a first cover) 103 located at the lower end of the cylindrical body 101, and a top cover (also referred to as a second cover) 105 located at the upper end of the cylindrical body 101. The bearing housing 18 is located in a space SP below the motor 14. The space SP is defined by the motor 14 and the housing 110 (specifically, the lower part of the cylindrical body 101 and the bottom cover 103). The bearing housing 18 is fixedly attached to the cylindrical body 101.

[0043] The bottom cover 103 includes a base 131 and an axial extension 132. The base 131 is generally partially spherical. The axial extension 132 extends from the circular outer periphery of the base 131 along the axial direction of the compressor 100. The axial extension 132 is interference-fitted into the cylindrical body 101, thereby forming a cylindrical reinforcement 111 of the outer casing 110.

[0044] The cylindrical reinforcing portion 111 has increased thickness and increased rigidity compared to the cylindrical body 101. Since the rigidity of the cylindrical reinforcing portion 111 is greater than that of other parts of the outer casing 110, noise radiation can be significantly reduced. In addition, the cylindrical body 101 is interference-fitted with the axial extension portion 132, so it can absorb some energy through small relative frictional movements, that is, increase damping to reduce noise radiation.

[0045] The bottom cover 103 has an increased overall weight due to the axial extension 132, which also helps reduce noise. The thickness T of the axial extension 132 can be greater than or equal to the thickness t of the cylindrical body 101. Figure 2 In the example, the thickness T of the axial extension 132 is greater than the thickness t of the cylindrical body 101. Alternatively, the thickness T of the axial extension 132 may also be greater than the thickness of the base 131.

[0046] The term "axial extension" as used herein refers to a portion with an axially extended height capable of significantly reducing noise, rather than a flange extending axially for mounting, positioning, or attachment purposes in the conventional sense. For example, in Figures 1 to 5 In the example, the axial height H measured from the bottom surface of bearing 18 to the outer circular periphery of the base 131 of bottom cover 103 is denoted as H. Therefore, the axial extension height of the axial extension 132 is greater than or equal to half of H. To better reduce noise, the axial extension 132 can extend as far as possible toward the bearing housing 18. To avoid interference with the bearing housing 18, a certain gap G is formed between the end face 134 of the axial extension 132 and the bearing housing 18. The gap G can be greater than or equal to 0.5 mm and less than or equal to 3 mm.

[0047] Therefore, the compressor according to the first embodiment of this disclosure only requires improvements to the structure of the bottom cover 103 to significantly reduce noise radiation. This significantly reduces manufacturing processes and costs.

[0048] Furthermore, the lower end 113 of the cylindrical body 101 can be welded to the axial extension 132 of the bottom cover 103. For example, the lower end 113 of the cylindrical body 101 can be welded to the axial extension 132 of the bottom cover 103 360 degrees in the circumferential direction, that is, there is an annular weld between the lower end 113 and the axial extension 132. In this way, a firm attachment between the cylindrical body 101 and the bottom cover 103 can be achieved, and noise radiation can be further reduced.

[0049] exist Figures 1 to 5 In the example, a support plate 102 can be further provided. The support plate 102 is interference-fitted at the end (which may be referred to as the upper end or free end) 133 of the axial extension 132. In this way, the support plate 102 can increase the radial stiffness of the bottom cover 103, and thus the radial stiffness of the housing. This can further reduce noise.

[0050] The top surface 134 of the end 133 of the axial extension 132 can be recessed to form a stepped surface 135. The support plate 102 can abut against the stepped surface 135. This facilitates the installation, support, and positioning of the support plate 102. The support plate 102 is in the form of a flat plate. The support plate 102 may be provided with a central through hole 122 for the crankshaft 12 to pass through, thus forming a generally annular shape. The support plate 102 may be provided with holes 121 for ventilation, oil return, or other purposes.

[0051] Multiple independent support legs 104 may be provided on the outer surface of the base 131 of the bottom cover 103 to support the compressor 100 on an external structure (e.g., a floor). For example, three or four support legs 104 may be provided. The independent support legs 104 can reduce the noise radiation area, thereby reducing noise radiation. It should be understood that the shape, structure, and number of support legs 104 are not limited to the specific examples shown in the figure, as long as they can reduce the noise radiation area while meeting the requirements of support strength.

[0052] Figures 6 to 9 A compressor 200 according to a second embodiment of the present disclosure is shown. The compressor 200 differs from the compressor 100 in the attachment between the bottom cover 203 and the cylindrical body 201.

[0053] See Figures 6 to 9 The bottom cover 203 includes a base 231 and an axial extension 232. The axial extension 232 extends from the circular outer periphery of the base 231 along the axial direction of the compressor 200. The thickness of the axial extension 232 is greater than the thickness of the cylindrical body 201, thereby forming the cylindrical reinforcement 211 of the outer casing 210. For example, the thickness T of the axial extension 232 is greater than or equal to twice the thickness t of the cylindrical body 201.

[0054] The cylindrical reinforcing part 211 has increased thickness and increased rigidity compared to the cylindrical body 201. Since the rigidity of the cylindrical reinforcing part 211 is greater than that of other parts of the outer shell 210, noise radiation can be significantly reduced.

[0055] The end 233 of the axial extension 232 and the end 213 of the cylindrical body 201 are fixed to each other, for example, by welding. For example, there is an annular weld between the end 233 of the axial extension 232 and the end 213 of the cylindrical body 201, that is, welded 360 degrees in the circumferential direction.

[0056] The top surface 234 of the axial extension 232 can be recessed to form a first stepped surface 236, allowing the end 213 of the cylindrical body 201 to abut against the first stepped surface 236. This facilitates the installation, support, and positioning of the cylindrical body 201. Furthermore, the top surface 234 of the axial extension 232 can be further recessed to form a second stepped surface 235, allowing the support plate 202 to abut against the second stepped surface 235. This facilitates the installation, support, and positioning of the support plate 202. The second stepped surface 235 is located radially inside the first stepped surface 236. The structure of the support plate 202 can be the same as that of the support plate 102.

[0057] Figure 10 and Figure 11 A compressor 300 according to a third embodiment of the present disclosure is shown. The compressor 300 differs from the compressor 100 in that it is provided with a separate reinforcing member 320 in place of the axial extension of the bottom cover.

[0058] See Figure 10 and Figure 11 The compressor 300 includes a separate reinforcing member 320. The reinforcing member 320 is cylindrical and is interference-fitted into the cylindrical body 301, thereby forming a cylindrical reinforcing portion 311 of the outer casing 310. In the compressor 300, the bottom cover 303 does not have an axial extension interference-fitted into the cylindrical body 301.

[0059] The cylindrical reinforcing part 311 has increased thickness and increased rigidity compared to the cylindrical body 301. Since the rigidity of the cylindrical reinforcing part 311 is greater than that of other parts of the outer shell 310, noise radiation can be significantly reduced.

[0060] The reinforcing member 320 can be made of a different material than the housing 310. When the compressor is running, the materials of the reinforcing member 320 and the housing 310 have different rates of expansion, so there is a small relative movement between the reinforcing member 320 and the housing 310, thereby increasing damping and thus reducing noise radiation.

[0061] Figures 12 to 14 A compressor 400 according to a fourth embodiment of this disclosure is shown. The compressor 400 differs from the compressor 300 in that the structure of the individual reinforcing members is different.

[0062] See Figures 12 to 14The compressor 400 includes a separate reinforcing member 420. The reinforcing member 420 includes a cylindrical portion 421 that is interference-fitted with the cylindrical body 401 and a bottom 422 extending radially from one end of the cylindrical portion. The cylindrical portion 421 is interference-fitted with the cylindrical body 401, thereby forming a cylindrical reinforcing portion 411 of the housing 410.

[0063] The cylindrical reinforcing part 411 has increased thickness and increased rigidity compared to the cylindrical body 401. Since the rigidity of the cylindrical reinforcing part 411 is greater than that of other parts of the outer shell 410, noise radiation can be significantly reduced.

[0064] The bottom 422 can serve a similar function to the support plate 102, that is, it can raise the cylindrical portion 421 and thus increase the radial stiffness of the housing.

[0065] The bottom 422 can be positioned adjacent to the bearing housing 18. In the illustrated example, the bottom 422 is annular and has a hole 423 to receive a fastener, such as a bolt 19. The bottom 422 can be connected to the bearing housing 18 by the bolt 19. A hole 424 may also be provided on the bottom 422 for venting, oil return, or other purposes.

[0066] Figure 15 and Figure 16 A compressor 500 according to a fifth embodiment of the present disclosure is shown. The compressor 500 differs from the compressor 400 in that the position of the reinforcing member is different.

[0067] See Figure 15 and Figure 16 A separate reinforcing member 520 of the compressor 500 is disposed between the motor 14 and the bearing housing 18. The reinforcing member 520 includes a cylindrical portion 521 that is interference-fitted with the cylindrical body 501 and a bottom 522 extending radially from one end of the cylindrical portion 521. The cylindrical portion 521 is interference-fitted with the cylindrical body 501, thereby forming the cylindrical reinforcing portion 511 of the housing 510.

[0068] The cylindrical reinforcing part 511 has increased thickness and increased rigidity compared to the cylindrical body 501. Since the rigidity of the cylindrical reinforcing part 511 is greater than that of other parts of the outer shell 510, noise radiation can be significantly reduced.

[0069] The bottom portion 522 can be positioned adjacent to the bearing housing 18. The bottom portion 522 can have the same... Figure 14 The same structure as the bottom 422 shown can also have, for example, the same structure as shown. Figure 16 The structure shown is different from the bottom 422. Figure 16 In the example shown, the radial width of the bottom 522 is small, so no mounting holes or holes for other purposes are provided.

[0070] The upper end face of the cylindrical portion 521 can have a shape that matches that of the motor 14 (the stator of the motor in the illustrated example). For example... Figure 16 As shown, the upper end face of the cylindrical portion 521 has a protrusion 523 and a recess 525. In this example, the reinforcing member 520 can be press-fitted into the compressor housing together with the motor 14.

[0071] The structure of the various components or parts described in this article is not limited to the specific examples shown in the illustrations, but can be changed according to actual needs, as long as it can achieve the above-mentioned purpose.

[0072] Although a scroll compressor is shown in the accompanying drawings, it should be understood that the invention can be applied to any other suitable type of compressor.

[0073] 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 compressor, comprising: The outer casing includes a cylindrical body and a first cover and a second cover respectively disposed at two axial ends of the cylindrical body; A compression mechanism, which is housed within the housing and configured to compress the working fluid; A crankshaft configured to drive the compression mechanism; A motor, configured to drive the crankshaft to rotate, and A bearing housing, housed within and fixedly attached to the housing, is provided in the space defined by the motor and the housing, and is configured to rotatably support the crankshaft via a bearing. The outer shell has a cylindrical reinforcing portion for defining the space, and the rigidity of the cylindrical reinforcing portion is greater than the rigidity of other parts of the outer shell. The compressor includes a separate reinforcing member that is interference-fitted into the cylindrical body to form the cylindrical reinforcing portion. The separate reinforcing member includes a cylindrical portion that is interference-fitted with the cylindrical body and a bottom extending radially from one end of the cylindrical portion, the bottom being positioned adjacent to the bearing housing.

2. The compressor according to claim 1, wherein, The reinforcing member is located between the motor and the bearing housing, and the end face of the cylindrical portion has a shape that mates with the stator of the motor.

3. The compressor according to claim 1 or 2, wherein, The bottom is ring-shaped.

4. The compressor according to claim 1 or 2, wherein, The bottom is connected to the bearing housing via fasteners.

5. The compressor according to claim 1 or 2, wherein, The reinforcing member is made of a material different from that of the outer shell.

6. The compressor according to claim 1 or 2, wherein, The compressor is a vertical compressor, the first cover is a bottom cover, and the bearing housing is a lower bearing housing.

7. The compressor according to claim 6, wherein, The bottom cover is provided with multiple independent support legs, which are evenly distributed in the circumferential direction to support the compressor on the external structure.

8. A compressor, comprising: The outer casing includes a cylindrical body and a first cover and a second cover respectively disposed at two axial ends of the cylindrical body; A compression mechanism, which is housed within the housing and configured to compress the working fluid; A crankshaft configured to drive the compression mechanism; A motor, configured to drive the crankshaft to rotate, and A bearing housing, housed within and fixedly attached to the housing, is provided in the space defined by the motor and the housing, and is configured to rotatably support the crankshaft via a bearing. The outer shell has a cylindrical reinforcing portion for defining the space, and the rigidity of the cylindrical reinforcing portion is greater than the rigidity of other parts of the outer shell. The first cover includes a base and an axially extending portion, the axially extending portion extending from the outer periphery of the base along the axial direction of the compressor, wherein a support plate is interference-fitted at the end of the axially extending portion. The compressor is a vertical compressor, the first cover is a bottom cover, and the bearing housing is a lower bearing housing.

9. The compressor according to claim 8, wherein, The axial extension is interference-fitted into the cylindrical body to form the cylindrical reinforcement of the outer shell.

10. The compressor according to claim 8, wherein, The end of the axial extension is fixedly attached to the end of the cylindrical body. The thickness of the axial extension is greater than the thickness of the cylindrical body, and the axial extension forms the cylindrical reinforcement of the outer shell.

11. The compressor according to claim 10, wherein, The thickness of the axial extension is greater than or equal to twice the thickness of the cylindrical body.

12. The compressor according to any one of claims 9 to 11, wherein, The first cover is attached to the cylindrical body via an annular weld.

13. The compressor according to claim 8, wherein, The support plate is an annular flat plate.

14. The compressor according to claim 8, wherein, The top of the axial extension has a recessed stepped surface to support or position the support plate.

15. The compressor according to claim 8, wherein, The bottom cover is provided with multiple independent support legs, which are evenly distributed in the circumferential direction to support the compressor on the external structure.

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