Electric compressor, air conditioner and vehicle

Abstract

The utility model discloses a kind of electric compressor, air conditioner and vehicle, electric compressor includes: casing, driving component and bearing seat, low-pressure chamber is equipped in casing, casing has the air inlet channel being communicated with low-pressure chamber;Driving component includes motor and crankshaft, motor is located in low-pressure chamber, motor is cooperated with crankshaft to drive crankshaft rotation;Bearing seat is located in the support bottom wall of low-pressure chamber, bearing seat is equipped with the installation cavity for installing first support bearing, first support bearing is sleeved on the end of crankshaft;Wherein, the part of support bottom wall located on the side of bearing seat away from air inlet channel is defined as positioning plane, in the axial direction of crankshaft, at least part of the cross section of air inlet channel is located on the side of positioning plane away from driving component, cross section and the extension plane of positioning plane are set at angle. Thus, the shielding influence of stator to the airflow flowing into low-pressure chamber can be reduced, the suction pressure loss is improved, and the performance of electric compressor is improved.

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] In the prior art, the suction port of an electric compressor is usually located on the inner wall of the bottom of the casing facing the motor cylinder. Due to the obstruction of the stator, the suction resistance and suction loss increase, which leads to an increase in the compressor's power and a decrease in performance. This is especially true under high speed and high flow conditions, where the performance deteriorates further, and there is room for improvement. 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 reduce the obstruction of airflow into the low-pressure chamber by the stator, improve suction pressure loss, and enhance the performance of the electric compressor.

[0004] An electric compressor according to an embodiment of the present invention includes: a housing, wherein a low-pressure chamber is provided inside the housing, and the housing has an intake passage communicating with the low-pressure chamber; a drive component, wherein the drive component includes a motor and a crankshaft, the motor being disposed in the low-pressure chamber, and the motor cooperating with the crankshaft to drive the crankshaft to rotate; and a bearing housing, wherein the bearing housing is disposed on a supporting bottom wall of the low-pressure chamber, and the bearing housing has an installation cavity for installing a first supporting bearing, the first supporting bearing being sleeved on the end of the crankshaft; wherein, a portion of the supporting bottom wall located on the side of the bearing housing away from the intake passage is defined as a positioning plane, and in the axial direction of the crankshaft, at least a portion of the cross-section of the intake passage is located on the side of the positioning plane away from the drive component, and the cross-section is set at an angle to the extension surface of the positioning plane.

[0005] According to the present invention, by disposing at least a portion of the cross-section of the intake channel on the side of the positioning plane away from the drive component, the stator can reduce the obstruction of the airflow into the low-pressure chamber, improve the intake pressure loss, and enhance the performance of the electric compressor. Furthermore, the electric compressor has a compact structure, which improves the design rationality of the electric compressor.

[0006] According to some embodiments of the present invention, the minimum cross-sectional area of ​​the air intake channel of the electric compressor is S, and the area of ​​the portion of the cross-section of the air intake channel located on the side of the positioning plane away from the driving component is S1, satisfying: 0.15≤S1 / S≤1.

[0007] According to some embodiments of the present invention, in the electric compressor, a portion of the intake passage extends radially inward to the stator of the motor in the radial direction of the crankshaft.

[0008] According to some embodiments of the present invention, in an electric compressor, the outer peripheral wall of the bearing housing defines a portion of the inner wall of the air intake passage.

[0009] According to some embodiments of the present invention, in the axial direction of the crankshaft, a portion of the side plate of the housing protrudes in a direction away from the drive component to define a protrusion that defines at least a portion of the intake passage.

[0010] According to some embodiments of the present invention, in the axial direction of the crankshaft, the inner wall of the protrusion is provided with an air intake groove that is recessed in a direction away from the drive component.

[0011] According to some embodiments of the present invention, in the electric compressor, the air inlet slot is smoothly connected to the outer peripheral wall of the bearing housing via a transition slope.

[0012] According to some embodiments of the present invention, in the axial direction of the crankshaft, the connection between the transition slope and the outer peripheral wall of the bearing housing is located on the side of the positioning plane opposite to the drive component.

[0013] According to some embodiments of the present invention, in the electric compressor, the radial ends of the intake groove extend beyond the stator in the radial direction of the crankshaft.

[0014] According to some embodiments of the present invention, the electric compressor has a cross-section and an extension surface of the positioning plane that are perpendicular to each other.

[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 has good performance and a compact structure, which can improve the overall performance of the air conditioner and reduce the layout difficulty 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 electric compressor according to any of the above embodiments; or an air conditioner according to any of the above embodiments.

[0020] The vehicle according to the embodiments of this utility model has a low overall layout difficulty, good performance, and is conducive to enhancing the brand image of the vehicle.

[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 schematic diagram of an electric compressor according to an embodiment of the present utility model;

[0024] Figure 2 This is a cross-sectional view of an electric compressor according to an embodiment of the present utility model;

[0025] Figure 3 This is a simulation diagram of the suction pressure loss of an electric compressor in the prior art;

[0026] Figure 4 This is a simulation diagram of the suction pressure loss of the electric compressor according to an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of a low-pressure shell according to an embodiment of the present invention.

[0028] Figure label:

[0029] Electric compressor 100, positioning plane L, cross section F,

[0030] Engine housing 1, low-pressure housing 11, low-pressure chamber 111, supporting bottom wall 1111, air intake passage 112, protrusion 113, air intake groove 1131, transition slope 1132, high-pressure housing 12, high-pressure chamber 121

[0031] Drive component 2, motor 21, stator 211, rotor 212, rotor flow channel 2121, crankshaft 22,

[0032] Bearing housing 3, compression component 4, moving scroll 41, stationary scroll 42, compression chamber 43, bracket 5, first support bearing 6. Detailed Implementation

[0033] 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.

[0034] Hereinafter, with reference to the accompanying drawings, an electric compressor 100 according to an embodiment of the present invention will be described.

[0035] like Figures 1-5 As shown, the electric compressor 100 according to an embodiment of the present invention includes: a housing 1, a drive component 2, and a bearing seat 3. The housing 1 has a low-pressure chamber 111 and an intake passage 112 communicating with the low-pressure chamber 111. The drive component 2 includes a motor 21 and a crankshaft 22. The motor 21 is disposed in the low-pressure chamber 111 and cooperates with the crankshaft 22 to drive the crankshaft 22 to rotate. The bearing seat 3 is disposed on the supporting bottom wall 1111 of the low-pressure chamber 111. The bearing seat 3 has an installation cavity for installing a first support bearing 6. The first support bearing 6 is sleeved on the end of the crankshaft 22. The portion of the supporting bottom wall 1111 located on the side of the bearing seat 3 away from the intake passage 112 is defined as the positioning plane L. In the axial direction of the crankshaft 22, at least a portion of the cross section F of the intake passage 112 is located on the side of the positioning plane L away from the drive component 2, and the cross section F is set at an angle to the extension surface of the positioning plane L.

[0036] Therefore, the obstruction effect of stator 211 on the airflow into low-pressure chamber 111 can be reduced, the intake pressure loss can be improved, the performance of electric compressor 100 can be enhanced, and the electric compressor 100 has a compact structure, which improves the design rationality of electric compressor 100.

[0037] First, such as Figures 1-2 As shown, the electric compressor 100 includes a housing 1, a drive component 2, a compression component 4, a bracket 5, and a bearing housing 3. The housing 1 includes a connected low-pressure housing 11 and a high-pressure housing 12. The high-pressure housing 12 has a high-pressure chamber 121, and the low-pressure housing 11 has a low-pressure chamber 111. An air intake passage 112 is also provided on the outer peripheral wall of the low-pressure housing 11. The air intake passage 112 extends outward toward the low-pressure housing 11 and communicates with the low-pressure chamber 111, so that airflow from outside the electric compressor 100 can flow into the low-pressure chamber 111 through the air intake passage 112. The drive component 2 includes a motor 21 and a crankshaft 22. The motor 21 is located in the low-pressure chamber 111, and at least a portion of the crankshaft 22 is located in the low-pressure chamber 111 and is linked with the motor 21, so that the motor 21 can selectively drive the crankshaft 22 to rotate.

[0038] The compression component 4 is sandwiched between the low-pressure shell 11 and the high-pressure shell 12 of the housing 1. The compression component 4 includes a moving scroll 41 and a stationary scroll 42, which cooperate to define a compression chamber 43, which is connected to the low-pressure chamber 111. When the moving scroll 41 moves relative to the stationary scroll 42, the compression component 4 can draw in airflow from the low-pressure chamber 111 for compression and discharge the compressed high-pressure airflow into the high-pressure chamber 121.

[0039] The bracket 5 is located between the low-pressure housing 11 and the high-pressure housing 12 of the housing 1. The bracket 5 is used to separate the compression component 4 and the drive component 2. The bracket 5 can be positioned along the axial direction of the crankshaft 22 (see reference). Figure 2 The moving scroll 41 is limited in the left-right direction (as shown) to ensure the stability of the compression component 4. The end of the crankshaft 22 facing the compression component 4 passes through the bracket 5 and is connected to the moving scroll 41. The bracket 5 can support the crankshaft 22 so that the crankshaft 22 can better drive the moving scroll 41 to move relative to the stationary scroll 42, thereby achieving stable compression of the airflow.

[0040] The bearing housing 3 is supported on the support bottom wall 1111 of the low-pressure chamber 111. The bearing housing 3 has an installation cavity that is connected to the low-pressure chamber 111 and is used to install the first support bearing 6. The end of the crankshaft 22 away from the compression component 4 can extend into the installation cavity, so that the first support bearing 6 can be sleeved on the end of the crankshaft 22, so that the bearing housing 3 supports the crankshaft 22 through the first support bearing 6, thereby ensuring the rotational stability of the crankshaft 22.

[0041] The portion of the supporting bottom wall 1111 located on the side of the bearing housing 3 away from the intake passage 112 can be defined as the positioning plane L. In the axial direction of the crankshaft 22, at least a portion of the cross section F of the intake passage 112 is located on the side of the positioning plane L away from the drive component 2, and the cross section F is set at an angle to the extension surface of the positioning plane L.

[0042] It should be noted that the portion of the support bottom wall 1111 located on the side of the bearing housing 3 away from the intake channel 112 has a fitting clearance with the end of the stator 211. By defining the portion of the support bottom wall 1111 located on the side of the bearing housing 3 away from the intake channel 112 as the positioning plane L, and by setting at least a portion of the cross section F of the intake channel 112 on the side of the positioning plane L away from the drive component 2, the portion of the intake channel 112 located on the side of the positioning plane L away from the drive component 2 and the portion of the intake channel 112 corresponding to the fitting clearance can be offset from the stator 211 along the axial direction of the crankshaft 22.

[0043] In other words, combining Figure 3 and Figure 4 The simulation results show that by placing at least a portion of the cross-section F of the intake channel 112 on the side of the positioning plane L opposite to the drive component 2, the obstruction effect of the stator 211 on the airflow into the low-pressure chamber 111 can be reduced, thus reducing the intake pressure loss, especially the intake pressure loss when the airflow flows through the intake channel 112 and through the stator 211, which is beneficial to improving the performance of the electric compressor 100. In addition, this arrangement does not require radially increasing the bottom space of the low-pressure housing 11, allowing the electric compressor 100 to maintain a compact structure.

[0044] According to the embodiment of the present invention, the electric compressor 100, by setting at least a portion of the cross section F of the intake channel 112 on the side of the positioning plane L away from the drive component 2, can reduce the obstruction effect of the stator 211 on the airflow flowing into the low-pressure chamber 111, improve the intake pressure loss, improve the performance of the electric compressor 100, and the electric compressor 100 has a compact structure, which improves the design rationality of the electric compressor 100.

[0045] In some embodiments of this utility model, the minimum cross-sectional area of ​​the air intake channel 112 is S, and the area of ​​the portion of the cross-section F of the air intake channel 112 located on the side of the positioning plane L away from the driving component 2 is S1, satisfying: 0.15≤S1 / S≤1.

[0046] For example, refer to Figure 2 As shown, the minimum cross-sectional area of ​​the intake channel 112 can be set as S, and the area of ​​the portion of the cross-section F of the intake channel 112 located on the side of the positioning plane L away from the drive component 2 can be set as S1, satisfying: 0.15≤S1 / S≤1. That is, the ratio of the area S1 of the portion of the cross-section F of the intake channel 112 located on the side of the positioning plane L away from the drive component 2 to the minimum cross-sectional area S of the intake channel 112 can be set to be greater than or equal to 0.15 and less than or equal to 1, such as 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, etc.

[0047] The above settings effectively reduce the obstruction of airflow into the low-pressure chamber 111 by the stator 211, greatly improving suction pressure loss and thus enhancing the performance of the electric compressor 100.

[0048] In some embodiments of this utility model, such as Figure 2 As shown, the motor 21 includes a stator 211 and a rotor 212. The rotor 212 is connected to the crankshaft 22. The stator 211 is arranged around the rotor 212 and its outer peripheral wall is supported on the inner wall of the low-pressure chamber 111. The stator 211 and the rotor 212 are coupled together so that the stator 211 can drive the rotor 212 to rotate, thereby driving the crankshaft 22 to rotate.

[0049] The rotor 212 is provided with a rotor flow channel 2121 that runs through the axial direction. In the radial direction of the crankshaft 22, a part of the intake passage 112 extends to the radial inner side of the stator 211 to communicate with the rotor flow channel 2121. In this way, when the airflow flows into the low-pressure chamber 111 from the intake passage 112, the airflow can flow directly from the rotor flow channel 2121 to the compression component 4.

[0050] By adopting the above settings, the obstruction effect of stator 211 on airflow can be reduced, the flow resistance in low-pressure chamber 111 can be reduced, and the performance of electric compressor 100 can be improved.

[0051] In some embodiments of this utility model, such as Figure 2 As shown, the intake passage 112 can be extended to the bearing housing 3, and the outer peripheral wall of the bearing housing 3 can define a portion of the inner wall of the intake passage 112. This allows the outer peripheral wall of the bearing housing 3 to form the boundary of the intake passage 112, simplifying the structure of the electric compressor 100, reducing machining and positioning difficulties, and making full use of the space within the low-pressure chamber 111. This also allows for increasing the size of the intake passage 112, thereby reducing flow resistance.

[0052] Of course, this utility model is not limited to this. It can also be arranged with the air intake channel 112 spaced apart from the bearing seat 3, and a protrusion is provided on the supporting bottom wall 1111 of the low-pressure chamber 111, which forms the boundary of the air intake channel 112. In this way, the air intake channel 112 can be flexibly arranged to meet different working conditions.

[0053] In some embodiments of this utility model, such as Figure 2 and Figure 5 As shown, in the axial direction of the crankshaft 22, a portion of the side plate of the housing 1 may be provided to protrude in a direction away from the drive component 2 to define a protrusion 113, which is used to define at least a portion of the intake passage 112.

[0054] With the above settings, processing space can be reserved for the air intake channel 112 so that the arrangement of the air intake channel 112 is not restricted by the housing 1, and the overall size change of the housing 1 is small, which helps to keep the structure of the electric compressor 100 compact.

[0055] In some embodiments of this utility model, such as Figure 2 and Figure 5 As shown, in the axial direction of the crankshaft 22, the inner wall of the protrusion 113 can be provided with an intake groove 1131 that is recessed in the direction away from the drive component 2. The intake groove 1131 is used to guide the airflow in the intake channel 112. This can make the airflow path more reasonable, which is conducive to improving the airflow stability and reducing the noise during the airflow process.

[0056] In some embodiments of this utility model, such as Figure 2 As shown, the air inlet groove 1131 can be smoothly connected to the outer peripheral wall of the bearing housing 3 via a transition slope 1132. The transition slope 1132 is used to guide the airflow in the air inlet groove 1131 to the outer peripheral wall of the bearing housing 3, so that the airflow can flow along the outer peripheral wall of the bearing housing 3 to the rotor flow channel 2121. With the above arrangement, the flow stability of the airflow can be improved, so that the airflow is less likely to form turbulence, which helps to reduce noise and improve the compression efficiency of the electric compressor 100.

[0057] Of course, the air intake groove 1131 and the outer peripheral wall of the bearing seat 3 can also be smoothly connected by a transition surface, and this utility model does not limit this.

[0058] In some embodiments of this utility model, such as Figure 2 As shown, in the axial direction of the crankshaft 22, the connection between the transition slope 1132 and the outer peripheral wall of the bearing housing 3 can be located on the side of the positioning plane L away from the drive component 2. This allows for a sufficient distance between the transition slope 1132 and the stator 211, which helps reduce flow resistance and improves the design rationality of the electric compressor 100.

[0059] In some embodiments of this utility model, such as Figure 2 As shown, in the radial direction of the crankshaft 22, the radial ends of the intake groove 1131 can be extended beyond the stator 211, so that the stator 211 can be opposite to the intake groove 1131 along the axial direction of the crankshaft 22, thereby specifically increasing the flow area of ​​the portion of the intake channel 112 corresponding to the stator 211. This reduces the influence of the stator 211 on the airflow and helps improve the stability of the airflow.

[0060] In some embodiments of this invention, the cross-section F and the extension surface of the positioning plane L can be arranged perpendicularly. This reduces the difficulty of positioning the cross-section and improves the design rationality of the electric compressor 100.

[0061] This utility model also proposes an air conditioner.

[0062] An air conditioner according to an embodiment of the present invention includes an electric compressor 100 according to any of the above embodiments.

[0063] According to the embodiment of the present invention, the electric compressor 100 of the air conditioner has good performance and a compact structure, which can improve the overall performance of the air conditioner and reduce the layout difficulty of the air conditioner.

[0064] This utility model also proposes a vehicle.

[0065] A vehicle according to an embodiment of the present invention includes: an electric compressor 100 according to any of the above embodiments; or an air conditioner according to any of the above embodiments.

[0066] The vehicle according to the embodiments of this utility model has a low overall layout difficulty, good performance, and is conducive to enhancing the brand image of the vehicle.

[0067] 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.

[0068] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0069] In the description of this utility model, "multiple" means two or more.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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 low-pressure chamber inside and an air intake passage communicating with the low-pressure 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; A bearing housing is provided on the supporting bottom wall of the low-pressure cavity, and the bearing housing has a mounting cavity for installing a first support bearing, which is sleeved on the end of the crankshaft. The portion of the support base wall located on the side of the bearing housing away from the intake passage is defined as the positioning plane. In the axial direction of the crankshaft, at least a portion of the cross-section of the intake passage is located on the side of the positioning plane away from the drive component, and the cross-section is set at an angle to the extension surface of the positioning plane.

2. The electric compressor according to claim 1, characterized in that, The minimum cross-sectional area of ​​the air intake channel is S, and the area of ​​the portion of the cross-section of the air intake channel located on the side of the positioning plane away from the driving component is S1, satisfying: 0.15≤S1 / S≤1.

3. The electric compressor according to claim 1, characterized in that, In the radial direction of the crankshaft, a portion of the intake passage extends to the radially inner side of the stator of the motor.

4. The electric compressor according to claim 3, characterized in that, The outer peripheral wall of the bearing housing defines a portion of the inner wall of the air intake passage.

5. The electric compressor according to claim 3, characterized in that, In the axial direction of the crankshaft, a portion of the side plate of the housing protrudes in a direction away from the drive component to define a protrusion that defines at least a portion of the intake passage.

6. The electric compressor according to claim 5, characterized in that, In the axial direction of the crankshaft, the inner wall of the protrusion is provided with an air intake groove that is recessed in the direction away from the drive component.

7. The electric compressor according to claim 6, characterized in that, The air intake groove is smoothly connected to the outer peripheral wall of the bearing housing via a transition slope.

8. The electric compressor according to claim 7, characterized in that, In the axial direction of the crankshaft, the connection between the transition slope and the outer peripheral wall of the bearing housing is located on the side of the positioning plane opposite to the drive component.

9. The electric compressor according to claim 6, characterized in that, In the radial direction of the crankshaft, the radial ends of the intake slot extend beyond the stator.

10. The electric compressor according to claim 1, characterized in that, The cross-section and the extension surface of the positioning plane are arranged perpendicularly.

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 electric compressor according to any one of claims 1-10; Or, the air conditioner according to claim 11.

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