Electric compressor, air conditioner and vehicle

Abstract

The utility model discloses an electric compressor, air conditioner and vehicle, electric compressor includes: casing, drive component, electric control component, compression component, support and bearing seat, is equipped with the partition wall in casing to separate low pressure chamber and electric control chamber, drive component includes motor and crankshaft, and the motor is located in low pressure chamber, and the motor is cooperated to drive the rotation of crankshaft, electric control component is located in electric control chamber and is electrically connected with drive component, compression component is located in casing, and compression component includes dynamic scroll and static scroll, and dynamic scroll and static scroll cooperate to limit the compression chamber, support is located in casing and is located between compression component and drive component, and the crankshaft is supported in support and is connected with dynamic scroll through support, bearing seat is located in the partition wall and is equipped with the installation cavity for installing first support bearing, on the axial direction of crankshaft, at least part of installation cavity coincides with the partition wall, and the end of crankshaft is sheathed with first support bearing. Therefore, can improve the static stiffness of bearing seat, to increase the natural frequency of bearing seat, thereby preventing the resonance.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning, and in particular to an electric compressor, an air conditioner, and a vehicle. Background Technology

[0002] Electric compressors typically include components such as a low-pressure housing, crankshaft, and auxiliary bearing. One end of the crankshaft is supported by the auxiliary bearing with a clearance fit, while the auxiliary bearing is mounted on a bearing housing at the bottom of the low-pressure housing. In related technologies, the bearing housing is not reinforced. When the bearing housing has insufficient rigidity, the auxiliary bearing will lose its normal support and positioning due to bearing housing deformation, leading to worsened vibration. There is room for improvement in this area. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide an electric compressor that can improve the static stiffness of the bearing housing, thereby increasing the natural frequency of the bearing housing and thus helping to prevent resonance.

[0004] An electric compressor according to an embodiment of the present invention includes: a housing, wherein a partition wall is provided inside the housing to separate a low-pressure chamber and an electrical control chamber; a drive component, wherein the drive component includes a motor and a crankshaft, the motor being disposed in the low-pressure chamber and cooperating with the crankshaft to drive the crankshaft to rotate; an electrical control component, wherein the electrical control component is disposed in the electrical control chamber and electrically connected to the drive component; a compression component, wherein the compression component is disposed in the housing, the compression component including a moving scroll and a stationary scroll, the moving scroll and the stationary scroll cooperating to define a compression chamber; a bracket, wherein the bracket is disposed in the housing, the bracket being located between the compression component and the drive component, the crankshaft being supported by the bracket and passing through the bracket and connected to the moving scroll; and a bearing housing, wherein the bearing housing is disposed in the partition wall, the bearing housing having a mounting cavity for mounting a first support bearing, wherein at least a portion of the mounting cavity coincides with the partition wall in the axial direction of the crankshaft, and the first support bearing is sleeved on the end of the crankshaft.

[0005] According to the electric compressor of this utility model embodiment, by setting at least a portion of the mounting cavity to coincide with the partition wall in the axial direction of the crankshaft, the partition wall can provide a certain support for the bearing seat in the radial direction of the crankshaft, thereby increasing the static stiffness of the bearing seat, increasing the natural frequency of the bearing seat, which is beneficial to prevent resonance, and the structure is simple and easy to process.

[0006] According to some embodiments of the present invention, in the electric compressor, the axial extension length H1 of the mounting cavity is greater than the thickness H2 of the partition wall.

[0007] According to some embodiments of the present invention, in the same longitudinal section, the longitudinal section is parallel to the extension direction of the crankshaft. A straight line passing through the axial center of the mounting cavity and extending along the height direction of the electric compressor is defined as a first center line, and a straight line passing through the axial center of the partition wall and extending along the height direction of the electric compressor is defined as a second center line. The first center line and the second center line are perpendicular.

[0008] According to some embodiments of the present invention, in an electric compressor, the bearing housing protrudes into the electrical control cavity relative to the partition wall.

[0009] According to some embodiments of the present invention, the electric compressor has an open end, and the plane corresponding to the open end of the mounting cavity protrudes from the portion of the partition wall connected to it.

[0010] According to some embodiments of the present invention, in an electric compressor, the top surface of the bearing housing and the side of the partition wall facing the low-pressure chamber are connected by a transition surface.

[0011] According to some embodiments of the present invention, the transition surface of the electric compressor is constructed as a transition curved surface.

[0012] According to some embodiments of the present invention, in the electric compressor, the bearing seat is located in the middle of the partition wall in the height direction of the electric compressor.

[0013] According to some embodiments of the present invention, the bearing housing and the partition wall of the electric compressor are integrally formed parts.

[0014] According to some embodiments of the present invention, the electric compressor has an oil passage groove in the bearing housing, the oil passage groove is located on the bottom wall of the mounting cavity, the crankshaft has an oil passage channel communicating with the oil passage groove, and the oil passage groove is communicating with the low-pressure cavity.

[0015] This utility model also proposes an air conditioner.

[0016] An air conditioner according to an embodiment of the present invention includes an electric compressor as described in any of the above embodiments.

[0017] According to the embodiments of the present invention, the electric compressor of the air conditioner is less prone to resonance, which can improve the reliability of the air conditioner.

[0018] This utility model also proposes a vehicle.

[0019] A vehicle according to an embodiment of the present invention includes: an air conditioner according to any of the above embodiments; or an electric compressor according to any of the above embodiments.

[0020] According to the vehicle embodiment of this utility model, the electric compressor is less prone to resonance, the air conditioner has high reliability, and user satisfaction with the vehicle can be improved.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a cross-sectional view of an electric compressor according to an embodiment of the present utility model;

[0024] Figure 2 This is a cross-sectional view of the bearing housing according to an embodiment of the present utility model.

[0025] Figure label:

[0026] Electric compressor 100,

[0027] Casing 1, high-pressure casing 11, high-pressure chamber 111, low-pressure casing 12, partition wall 13, low-pressure chamber 14, electrical control chamber 15.

[0028] Drive component 2, motor 21, crankshaft 22, oil passage 221,

[0029] Compression component 3, moving scroll 31, stationary scroll 32, compression chamber 33, support 4.

[0030] Bearing housing 5, mounting cavity 51, oil groove 52, top surface of bearing housing 53, transition surface 54, first support bearing 6. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] Hereinafter, with reference to the accompanying drawings, an electric compressor 100 according to an embodiment of the present invention will be described.

[0033] like Figures 1-2As shown, the electric compressor 100 according to an embodiment of the present invention includes: a housing 1, a drive component 2, an electrical control component, a compression component 3, a bracket 4, and a bearing seat 5. The housing 1 has a partition wall 13 to separate a low-pressure chamber 14 and an electrical control chamber 15. The drive component 2 includes a motor 21 and a crankshaft 22. The motor 21 is located in the low-pressure chamber 14, and the motor 21 cooperates with the crankshaft 22 to drive the crankshaft 22 to rotate. The electrical control component is located in the electrical control chamber 15 and is electrically connected to the drive component 2. The compression component 3 is located in the housing 1. The crankshaft 22 includes a moving scroll 31 and a stationary scroll 32, which cooperate to define a compression chamber 33; a bracket 4 is provided on the housing 1, and the bracket 4 is located between the compression component 3 and the drive component 2. The crankshaft 22 is supported on the bracket 4 and passes through the bracket 4 to connect with the moving scroll 31; a bearing housing 5 is provided on the partition wall 13, and the bearing housing 5 has a mounting cavity 51 for installing a first support bearing 6. In the axial direction of the crankshaft 22, at least a portion of the mounting cavity 51 coincides with the partition wall 13, and the end of the crankshaft 22 is sleeved with the first support bearing 6.

[0034] This allows the partition wall 13 to provide some support to the bearing housing 5 along the radial direction of the crankshaft 22, thereby increasing the static stiffness of the bearing housing 5 and increasing its natural frequency, which helps to prevent resonance. Moreover, no additional reinforcement structure is required, making the structure simple and easy to process.

[0035] First, such as Figures 1-2 As shown, the electric compressor 100 includes a housing 1, a drive component 2, an electrical control component, a compression component 3, and a bracket 4. The housing 1 includes a low-pressure housing 12 and a high-pressure housing 11. The high-pressure housing 11 contains a high-pressure chamber 111, and the low-pressure housing 12 has a partition wall 13 that separates the low-pressure chamber 14 and the electrical control chamber 15. The drive component 2 includes a motor 21 and a crankshaft 22. The motor 21 is located within the low-pressure chamber 14, and at least a portion of the crankshaft 22 is located within the low-pressure chamber 14. The crankshaft 22 is linked to the motor 21 to drive the crankshaft 22 to rotate. The electrical control component is installed within the electrical control chamber 15 and is electrically connected to the drive component 2. The electrical control component selectively controls the operation of the motor 21 to selectively drive the crankshaft 22 to rotate.

[0036] The compression component 3 is sandwiched between the low-pressure shell 12 and the high-pressure shell 11 of the housing 1. The compression component 3 includes a moving scroll 31 and a stationary scroll 32. The moving scroll 31 and the stationary scroll 32 cooperate to define the compression chamber 33. The compression chamber 33 is connected to the low-pressure chamber 14. When the moving scroll 31 moves relative to the stationary scroll 32, the compression component 3 can draw in gas from the low-pressure chamber 14 for compression and discharge the compressed high-pressure gas into the high-pressure chamber 111.

[0037] The bracket 4 is located between the low-pressure housing 12 and the high-pressure housing 11 of the housing 1. The bracket 4 is used to separate the compression component 3 and the drive component 2. The bracket 4 can be positioned along the axial direction of the crankshaft 22 (see reference). Figure 2 The moving scroll 31 is limited in the left-right direction (as shown) to ensure the stability of the compression component 3. The end of the crankshaft 22 facing the compression component 3 passes through the bracket 4 and is connected to the moving scroll 31. The bracket 4 can support the crankshaft 22 so that the crankshaft 22 can better drive the moving scroll 31 to move relative to the stationary scroll 32, thereby achieving stable gas compression.

[0038] The electric compressor 100 also includes a bearing housing 5, which is located in the middle of the partition wall 13. The bearing housing 5 has an installation cavity 51, which is connected to the low-pressure cavity 14 and is used to install the first support bearing 6. The end of the crankshaft 22 away from the drive component 2 can extend into the installation cavity 51, so that the first support bearing 6 can be sleeved on the crankshaft 22, so that the bearing housing 5 supports the crankshaft 22 through the first support bearing 6, thereby ensuring the rotational stability of the crankshaft 22.

[0039] In this design, at least a portion of the mounting cavity 51 can be aligned with the partition wall 13 along the axial direction of the crankshaft 22. This allows the partition wall 13 to support the bearing housing 5 radially along the crankshaft 22, thereby increasing the static stiffness of the bearing housing 5. This increases the natural frequency of the bearing housing 5, helping to prevent resonance, and eliminates the need for additional reinforcing structures, resulting in a simple structure that is easy to manufacture. Furthermore, it allows for better utilization of the axial space of the electric compressor 100, enabling a miniaturized design of the electric compressor 100.

[0040] According to the embodiment of the present invention, the electric compressor 100 has at least a portion of the mounting cavity 51 that overlaps with the partition wall 13 in the axial direction of the crankshaft 22, so that the partition wall 13 can provide a certain support for the bearing seat 5 in the radial direction of the crankshaft 22, thereby increasing the static stiffness of the bearing seat 5, thereby increasing the natural frequency of the bearing seat 5, which is beneficial to prevent resonance. Moreover, the structure is simple and easy to process.

[0041] In some embodiments of this utility model, such as Figure 2 As shown, in the axial direction of the crankshaft 22, the extension length H1 of the mounting cavity 51 can be set to be greater than the thickness H2 of the partition wall 13. Therefore, while ensuring the supporting effect of the partition wall 13, the thickness of the partition wall 13 can be reduced, thus reducing weight and achieving a lightweight design for the electric compressor 100.

[0042] In some embodiments of this utility model, on the same longitudinal section, the longitudinal section is parallel to the extension direction of the crankshaft 22. A straight line passing through the axial center of the mounting cavity 51 and extending along the height direction of the electric compressor 100 is defined as the first center line, and a straight line passing through the axial center of the partition wall 13 and extending along the height direction of the electric compressor 100 is defined as the second center line. The first center line and the second center line coincide.

[0043] For example, refer to Figure 2 As shown, the longitudinal section can be set to be parallel to the extension direction of the crankshaft 22. On the same longitudinal section, a section can be defined passing through the axial center of the mounting cavity 51 and along the height direction of the electric compressor 100 (see reference). Figure 2 The straight line extending in the vertical direction (as shown) is the first center line, and a straight line passing through the axial center of the partition wall 13 and extending along the height direction of the electric compressor 100 can be defined as the second center line. The first center line and the second center line coincide, that is, the middle part of the mounting cavity 51 in the axial direction coincides with the middle part of the partition wall 13 in the thickness direction, so that the partition wall 13 can be equivalent to a part of the side wall of the bearing housing 5. As a result, the static stiffness of the bearing housing 5 can be greatly improved, the natural frequency of the bearing housing 5 can be increased, and resonance can be prevented.

[0044] In some embodiments of this utility model, such as Figure 2 As shown, the bearing housing 5 can be configured to protrude into the electrical control cavity 15 relative to the partition wall 13. This configuration allows for more flexible arrangement of the bearing housing 5, facilitating the fulfillment of different operating conditions, and also enables the utilization of space within the electrical control cavity 15, thereby achieving a miniaturized design of the electric compressor 100.

[0045] In some embodiments of this utility model, such as Figure 2 As shown, the mounting cavity 51 can be configured to have an open end, which communicates with the low-pressure cavity 14. The plane corresponding to the open end of the mounting cavity 51 protrudes from the part of the partition wall 13 connected to it. This allows for a more flexible arrangement of the bearing housing 5, facilitating the fulfillment of different operating conditions and improving the design rationality of the electric compressor 100.

[0046] In addition, by setting the bearing housing 5 to protrude into the electrical control cavity 15 relative to the partition wall 13, and setting the plane corresponding to the open end of the mounting cavity 51 to protrude from the part connected to the partition wall 13, when the middle part of the mounting cavity 51 in the axial direction coincides with the middle part of the partition wall 13 in the thickness direction, the axial dimension of the mounting cavity 51 can be made not limited by the thickness of the partition wall 13, so that the thickness of the partition wall 13 can be set to be thinner, which is beneficial to achieving lightweight design.

[0047] In some embodiments of this utility model, such as Figure 2As shown, the top surface 53 of the bearing housing 5 and the partition wall 13 facing the low-pressure chamber 14 can be connected by a transition surface. This arrangement makes the connection between the bearing housing 5 and the partition wall 13 smoother, improving the installation stability of the bearing housing 5. Furthermore, when the bearing housing 5 and the partition wall 13 are integrally formed, the molding difficulty is reduced, and the machining accuracy is improved.

[0048] In some embodiments of this utility model, such as Figure 2 As shown, the transition surface can be constructed as a transition surface 54. This reduces stress concentration, improves the connection stability between the bearing housing 5 and the partition wall 13, and enhances the reliability of the electric compressor 100.

[0049] In some embodiments of this utility model, such as Figure 2 As shown, in the height direction of the electric compressor 100 (reference) Figure 2 As shown in the vertical direction, the bearing housing 5 is located in the middle of the partition wall 13. This arrangement allows the center of the bearing housing 5 to coincide with the center of the partition wall 13, resulting in a more balanced overall structural strength of the bearing housing 5, significantly improving its static stiffness, increasing its natural frequency, and helping to prevent resonance.

[0050] In some embodiments of this utility model, such as Figure 2 As shown, the bearing housing 5 and the partition wall 13 can be designed as a single integral part, such as by casting them together. This reduces the structural complexity of the electric compressor 100, lowers the processing difficulty, improves the installation stability of the bearing housing 5, and enhances the reliability of the electric compressor 100.

[0051] In some embodiments of this utility model, such as Figure 2 As shown, an oil passage groove 52 can be provided in the bearing housing 5. The oil passage groove 52 is located on the bottom wall of the mounting cavity 51. An oil passage 221 extending axially is provided in the crankshaft 22. One end of the oil passage 221 forms an oil inlet and the other end is connected to the oil passage groove 52. The oil passage groove 52 is connected to the low-pressure cavity 14.

[0052] Specifically, when the electric compressor 100 is running, lubricating oil can flow from the oil inlet into the oil passage 221, and then flow from the oil passage 221 to the oil trough 52. The lubricating oil flowing into the oil trough 52 can flow into the mounting cavity 51 to lubricate the first support bearing 6, and then the lubricating oil can further flow into the low-pressure cavity 14.

[0053] By adopting the above settings, the friction between the first support bearing 6 and the crankshaft 22 can be reduced, the rotational stability of the crankshaft 22 can be improved, and the overall performance of the electric compressor 100 can be enhanced.

[0054] This utility model also proposes an air conditioner.

[0055] An air conditioner according to an embodiment of the present invention includes an electric compressor 100 according to any of the above embodiments.

[0056] According to the embodiment of the present invention, the electric compressor 100 of the air conditioner is less prone to resonance, which can improve the reliability of the air conditioner.

[0057] This utility model also proposes a vehicle.

[0058] A vehicle according to an embodiment of the present invention includes: an air conditioner according to any of the above embodiments; or, an electric compressor 100 according to any of the above embodiments.

[0059] According to the vehicle embodiment of this utility model, the electric compressor 100 is less prone to resonance, the air conditioner has high reliability, and user satisfaction with the vehicle can be improved.

[0060] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0061] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0062] In the description of this utility model, "multiple" means two or more.

[0063] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0064] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric compressor, characterized in that, include: The housing has a partition wall inside to separate the low-pressure chamber and the electrical control chamber; A drive component, comprising a motor and a crankshaft, wherein the motor is disposed within the low-pressure chamber and cooperates with the crankshaft to drive the crankshaft to rotate; An electronic control component, wherein the electronic control component is disposed within the electronic control cavity and is electrically connected to the drive component; A compression component is disposed in the housing. The compression component includes a moving scroll and a stationary scroll, which cooperate to define a compression chamber. A bracket is provided on the housing, the bracket is located between the compression component and the drive component, the crankshaft is supported by the bracket and passes through the bracket to be connected to the moving scroll. A bearing housing is disposed on the partition wall, and the bearing housing has a mounting cavity for installing a first support bearing. In the axial direction of the crankshaft, at least a portion of the mounting cavity coincides with the partition wall, and the end of the crankshaft is fitted with the first support bearing.

2. The electric compressor according to claim 1, characterized in that, In the axial direction of the crankshaft, the extension length H1 of the mounting cavity is greater than the thickness H2 of the partition wall.

3. The electric compressor according to claim 2, characterized in that, On the same longitudinal section, which is parallel to the extension direction of the crankshaft, a straight line passing through the axial center of the mounting cavity and extending along the height direction of the electric compressor is defined as the first center line, and a straight line passing through the axial center of the partition wall and extending along the height direction of the electric compressor is defined as the second center line, and the first center line and the second center line coincide.

4. The electric compressor according to claim 2, characterized in that, The bearing housing protrudes into the electrical control cavity relative to the partition wall.

5. The electric compressor according to claim 4, characterized in that, The mounting cavity has an open end, and the plane corresponding to the open end of the mounting cavity protrudes beyond the portion of the partition wall connected to it.

6. The electric compressor according to claim 5, characterized in that, The top surface of the bearing housing and the side of the partition wall facing the low-pressure cavity are connected by a transition surface.

7. The electric compressor according to claim 6, characterized in that, The transition surface is constructed as a transition curved surface.

8. The electric compressor according to claim 1, characterized in that, In the height direction of the electric compressor, the bearing housing is located in the middle of the partition wall.

9. The electric compressor according to claim 1, characterized in that, The bearing housing and the partition wall are integrally formed parts.

10. The electric compressor according to any one of claims 1-9, characterized in that, The bearing housing is provided with an oil passage groove, which is located on the bottom wall of the mounting cavity. The crankshaft is provided with an oil passage channel that communicates with the oil passage groove, and the oil passage groove is connected to the low-pressure cavity.

11. An air conditioner, characterized in that, Includes the electric compressor according to any one of claims 1-10.

12. A vehicle, characterized in that, include: The air conditioner according to claim 11; Alternatively, an electric compressor according to any one of claims 1-10.

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