Air compressor and vehicle

Abstract

The invention relates to the technical field of electric vehicles, in particular to an air compressor and a vehicle. The air compressor provided by the invention comprises a shell, wherein a cavity is formed in the shell; the cavity is fixedly arranged in the cavity; the rotor is rotatably mounted in the eccentric hole of the stator; the rotor is provided with a mounting groove, the slip sheet is mounted in the mounting groove of the rotor, the shell, the stator, the rotor and the slip sheet form an air suction cavity and a compression cavity, and the side wall of the stator is provided with a plurality of air outlets communicated with the compression cavity; the first oil-gas separation device is provided with a first gas inlet hole and a first gas outlet hole, and the first gas inlet hole is communicated with the gas outlet; and the second oil-gas separation device is provided with a second gas inlet hole and a second gas outlet hole, and the second gas inlet hole is communicated with the first gas outlet hole, so that the oil content of the second gas outlet hole can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric vehicles, and in particular to an air compressor and a vehicle. Background Art

[0002] The braking system is an important part of the car, and the gas produced by the electric vane air compressor that provides the braking source is particularly important.

[0003] The water-cooled electric vane air compressor, which provides the braking source, is located in the rear engine compartment of an electric vehicle. Since air compressors require lubricating oil, which is involved in much of the air compression process, a dedicated oil-gas separation filter is installed in the rear cover of the compressor. This separates the oil from the mixed air, ensuring the cleanliness of the discharged compressed air. However, the single oil-gas separation filter in current vane air compressors cannot completely remove the oil from the compressed air. As a result, a small amount of oil is mixed with the compressed air after it is discharged through the outlet valve, causing oil to spray from the compressor outlet connector. This loss of lubricating oil can lead to insufficient lubrication of internal components such as the vanes and rotor, increasing wear and tear, shortening the life of the compressor, and in severe cases, causing the motor to seize or burn out. Summary of the Invention

[0004] The present disclosure provides an air compressor and a vehicle to at least solve the above technical problems existing in the prior art.

[0005] A first aspect of the present disclosure provides an air compressor, comprising: a housing, wherein a cavity is provided inside the housing; a stator, disposed in the cavity; A rotor rotatably mounted in the eccentric hole of the stator; a vane mounted in the mounting groove of the rotor, wherein the housing, the stator, the rotor, and the vane constitute an air suction chamber and a compression chamber, and a side wall of the stator is provided with a plurality of air outlets communicating with the compression chamber; a first oil-gas separation device, provided with a first air inlet and a first air outlet, wherein the first air inlet is connected to the air outlet; The second oil-gas separation device is provided with a second air inlet and a second air outlet, and the second air inlet is communicated with the first air outlet.

[0006] Further, the first oil and gas separation device includes a first cylinder body, a first oil separation core, and a first cover body. The first oil separation core is disposed in the first cylinder body and forms a first annular space between the first oil separation core and the first cylinder body. The first cover body seals the upper end of the first cylinder body. The first cover body is provided with the first air inlet hole communicating with the inner hole of the first oil separation core, and the first cylinder body is provided with the first air outlet hole communicating with the first annular space.

[0007] Further, the second oil and gas separation device includes a second cylinder body, a second oil separation core, and a second cover body. The second oil separation core is disposed in the second cylinder body and forms a second annular space between the second oil separation core and the second cylinder body. The second cover body seals the upper end of the second cylinder body. The second cover body is provided with the second air inlet hole communicating with the first air outlet hole, and the second cylinder body is provided with the second air outlet hole communicating with the second annular space.

[0008] Further, the first cylinder body is provided with a first oil return hole communicating with the first annular space, and the second cylinder body is provided with a second oil return hole communicating with the second annular space.

[0009] Further, the first oil return hole communicates with a first pipeline, the second oil return hole communicates with a second pipeline, the compression chamber is provided with a third pipeline, and both the first pipeline and the second pipeline communicate with the third pipeline.

[0010] Further, both the first oil separation core and the second oil separation core include multiple layers of filter materials.

[0011] Further, a check valve is provided between the first air outlet hole and the second air inlet hole.

[0012] Further, a speed reducing component is further included. The speed reducing component is disposed in the cavity, and the speed reducing component is disposed between the air outlet and the first air inlet hole.

[0013] Further, the speed reducing component includes a third air inlet hole and a plurality of third air outlet holes. The third air inlet hole communicates with the air outlet, and all the plurality of third air outlet holes communicate with the third air inlet hole.

[0014] The second aspect of the present disclosure provides a vehicle, including the air compressor described in the first aspect.

[0015] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the prior art: The air compressor provided by the embodiments of the present disclosure includes a housing, a stator, a rotor, a sliding vane, a first oil-gas separation device, and a second oil-gas separation device; a cavity is provided inside the housing; the stator is disposed in the cavity; the rotor is rotatably installed in an eccentric hole of the stator; the sliding vane is installed in an installation groove of the rotor, and the housing, the stator, the rotor, and the sliding vane form an air intake cavity and a compression cavity, and a plurality of air outlet holes communicating with the compression cavity are provided on the side wall of the stator; the first oil-gas separation device is provided with a first air intake hole and a first air outlet hole, and the first air intake hole communicates with the air outlet hole; the second oil-gas separation device is provided with a second air intake hole and a second air outlet hole, and the second air intake hole communicates with the first air outlet hole.

[0016] The first oil-gas separation device first preliminarily separates the high-temperature and high-pressure oil-gas mixture discharged from the compression cavity, intercepts most of the oil droplets, and reduces the oil content in the gas; the gas after preliminary separation then enters the second oil-gas separation device for secondary fine separation. The series design of two-stage separation realizes the progressive treatment of "coarse separation + fine separation". Compared with single-stage separation, the oil content in the compressed air can be reduced by 50%-70%, reducing the oil content in the gas at the second air outlet hole to meet higher standards (such as from 3 ppm to 0.5-1 ppm), meeting the requirements of industrial scenarios with strict requirements for the quality of compressed air.

[0017] Secondly, the two-stage separation design makes the oil-gas separation process more stable, avoiding the problem of unstable separation effect caused by load fluctuations in single-stage separation. When the exhaust volume or the oil-gas mixing ratio of the air compressor changes, the first-stage separation can first perform buffer adjustment to provide relatively stable intake conditions for the second-stage separation. At the same time, the two-stage devices cooperate with each other, which can reduce the working load of the single-stage device and reduce the risk of equipment failure caused by excessive local pressure and too fast flow rate, ensuring the long-term stable operation of the air compressor.

[0018] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By referring to the drawings and reading the following detailed description, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become easily understood. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, wherein: In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0020] Figure 1 The structural schematic diagram of the air compressor provided by the embodiments of the present disclosure is shown Figure 1 ; Figure 2 The structural schematic diagram of the air compressor provided by the embodiments of the present disclosure is shown Figure 2 ; Figure 3 Shows the structural schematic diagram of the air compressor provided by the embodiments of the present disclosure Figure 3 ; Figure 4 Shows the structural schematic diagram of the air compressor provided by the embodiments of the present disclosure Figure 4 ; Figure 5 Shows the sectional structural schematic diagram of the air compressor provided by the embodiments of the present disclosure Figure 1 ; Figure 6 Shows the sectional structural schematic diagram of the air compressor provided by the embodiments of the present disclosure Figure 2 ; Figure 7 Shows the structural schematic diagram of the medium and slow speed structure of the air compressor provided by the embodiments of the present disclosure; Figure 8 Shows the structural schematic diagram of the air compressor provided by the embodiments of the present disclosure Figure 5 。

[0021] Description of the reference numerals in the figure: 1. Housing; 2. Stator; 21. Air outlet; 3. Rotor; 4. Sliding vane; 5. First oil-gas separation device; 51. First air inlet; 52. First air outlet; 53. First cylinder body; 54. First oil separation core; 55. First oil return hole; 56. First cover body; 6. Second oil-gas separation device; 61. Second air inlet; 62. Second air outlet; 621. Safety valve; 63. Second cylinder body; 64. Second oil separation core; 65. Second oil return hole; 66. Second cover body; 71. First pipeline; 72. Second pipeline; 73. Third pipeline; 8. Slow speed component; 81. Third air inlet; 82. Third air outlet; 83. Filter element. Detailed implementation manners

[0022] In order to make the objectives, features, and advantages of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present disclosure.

[0023] Combined with Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown in the figure, the air compressor provided by the embodiments of the present disclosure includes a housing 1, a stator 2, a rotor 3, a sliding vane 4, a first oil-gas separation device 5 and a second oil-gas separation device 6; a cavity is provided inside the housing 1; the stator 2 is arranged in the cavity; the rotor 3 is rotatably installed in the eccentric hole of the stator 2; the sliding vane 4 is installed in the installation groove of the rotor 3, and the housing 1, the stator 2, the rotor 3 and the sliding vane 4 form an air intake cavity and a compression cavity, and a plurality of air outlet holes 21 communicating with the compression cavity are provided on the side wall of the stator 2; the first oil-gas separation device 5 is provided with a first air intake hole 51 and a first air outlet hole 52, and the first air intake hole 51 is communicated with the air outlet hole 21; the second oil-gas separation device 6 is provided with a second air intake hole 61 and a second air outlet hole 62, and the second air intake hole 61 is communicated with the first air outlet hole 52.

[0024] The first oil-gas separation device 5 first preliminarily separates the high-temperature and high-pressure oil-gas mixture discharged from the compression cavity, intercepts most of the oil droplets, and reduces the oil content in the gas; the gas after preliminary separation then enters the second oil-gas separation device 6 for secondary fine separation. The series design of two-stage separation realizes the progressive treatment of "coarse separation + fine separation". Compared with single-stage separation, the oil content in the compressed air can be reduced by 50%-70%, and the oil content in the outlet gas can be reduced to meet higher standards (such as from 3 ppm to 0.5-1 ppm), meeting the requirements of industrial scenarios with strict requirements for compressed air quality.

[0025] Secondly, the double-stage separation design makes the oil-gas separation process more stable, avoiding the problem of unstable separation effect caused by load fluctuations in single-stage separation. When the exhaust volume or the oil-gas mixing ratio of the air compressor changes, the first-stage separation can first perform buffer adjustment to provide relatively stable intake conditions for the second-stage separation. At the same time, the two-stage devices cooperate with each other, which can reduce the working load of the single-stage device and reduce the risk of equipment failure caused by excessive local pressure and too fast flow rate, ensuring the long-term stable operation of the air compressor.

[0026] In addition, the double-separation structure formed by the first oil-gas separation device 5 and the second oil-gas separation device 6 can reduce the speed of the mixed gas, and the oil in the mixed gas can be isolated due to the speed reduction, improving the oil-water separation effect. The flow channel structure formed by the series connection of the two-stage separation devices enables the mixed gas to experience multiple velocity decays and flow direction changes when passing through the system. During this process, the oil droplets in the gas collide with the surface of the separation element due to inertia, thereby achieving effective separation. This design not only improves the oil-gas separation efficiency, but also reduces the system operation resistance and the energy consumption level of the air compressor by optimizing the gas-liquid two-phase flow pattern.

[0027] Optionally, the second air outlet hole 62 is provided with a safety valve 621.

[0028] In some specific embodiments, the first oil-gas separation device 5 includes a first cylinder 53, a first oil separator core 54, and a first cover 56. The first oil separator core 54 is disposed in the first cylinder 53 and forms a first annular space with the first cylinder 53. The first cover 56 seals the upper end of the first cylinder 53. The first cover 56 is provided with a first air inlet 51 connected to the inner hole of the first oil separator core 54. The first cylinder 53 is provided with a first air outlet 52 connected to the first annular space. After the mixed gas vertically enters the inner hole of the first oil separator core 54 from the top first air inlet 51, it is forced to diffuse into the outer annular space. Large oil droplets are thrown toward the inner wall of the first cylinder 53 due to centrifugal force and slide along the wall to the oil collection area at the bottom, achieving primary separation efficiency. When the gas passes through the first oil separator core 54 from the inner hole outward, the oil droplets are intercepted in the fiber layer of the filter element. Compared with axial flow, radial flow design increases the effective filtration area of the filter element by more than 30%, reduces the pressure drop by 15%-20%, and extends the filter element life by 25% under the same working conditions.

[0029] In some specific embodiments, the second oil-gas separation device 6 includes a second barrel 63, a second oil separator core 64, and a second cover 66. The second oil separator core 64 is disposed within the second barrel 63, forming a second annular space therebetween. The second cover 66 seals the upper end of the second barrel 63 and defines a second air inlet 61 that communicates with the first air outlet 52. The second barrel 63 also defines a second air outlet 62 that communicates with the second annular space. The second air inlet 61 communicates with the inner bore of the second oil separator core 64. As the gas flows through the inner bore into the outer annular space, the flow rate is further reduced to 3-5 m / s (the optimal operating flow rate for the oil separator core). This low-speed airflow reduces the inertial carryover of oil droplets, and combined with the agglomeration effect of the filter element, the separation efficiency of fine oil droplets is increased to over 99.9%.

[0030] In some specific embodiments, combined with Figure 1 、 Figure 2 and Figure 8 As shown, the first cylinder 53 is provided with a first oil return hole 55 that communicates with the first annular space, and the second cylinder 63 is provided with a second oil return hole 65 that communicates with the second annular space. The first oil return hole 55 connects to the bottom of the first annular space and directly recovers the oil separated in the first stage; the second oil return hole 65 connects to the bottom of the second annular space and recovers the relatively clean oil separated in the second stage. The return oil from both channels can be connected to the compression chamber of the air compressor through pipelines for recycling.

[0031] In some specific embodiments, the first oil return hole 55 is connected to the first pipeline 71, the second oil return hole 65 is connected to the second pipeline 72, the compression chamber is provided with a third pipeline 73, and the first pipeline 71 and the second pipeline 72 are both connected to the third pipeline 73, thereby constructing an efficient oil circulation system with significant technical effects in terms of oil recovery, energy consumption optimization and equipment reliability.

[0032] In some specific embodiments, both the first oil separation core 54 and the second oil separation core 64 include multiple layers of filter materials.

[0033] Optionally, both the first oil separation core 54 and the second oil separation core 64 include an outer layer, a middle layer, and an inner layer. The inner layer can be made of large-aperture fiber materials, the middle layer can use medium-aperture fibers, and the outer layer can use ultra-fine fibers.

[0034] In some specific embodiments, a one-way valve is provided between the first air outlet 52 and the second air inlet 61 to prevent the oil liquid from flowing back.

[0035] In some specific embodiments, it further includes a speed-reducing component 8. The speed-reducing component 8 is disposed in the cavity and between the air outlet 21 and the first air inlet 51. The speed-reducing component 8 can reduce the speed of the oil liquid, allowing more time for oil droplets to adhere to the speed-reducing component 8, reducing the oil content flowing into the subsequent first oil-gas separation device 5 and second oil-gas separation device 6, thereby improving the efficiency of the entire oil-gas separation system, reducing the oil content in the compressed air, and enhancing the quality of the compressed air. In addition, the double-separation structure formed by the first oil-gas separation device 5 and the second oil-gas separation device 6 can reduce the speed of the mixed gas, and the oil content in the mixed gas can be isolated due to the speed reduction, improving the oil-water separation effect. The multi-channel structure formed by the series connection of the speed-reducing component 8 and the two-stage separation device enables the mixed gas to experience multiple velocity decays and flow direction changes when passing through the system. During this process, the oil droplets in the gas collide with the surface of the separation element due to inertia, thereby achieving effective separation. This design not only improves the oil-gas separation efficiency but also reduces the system operation resistance and the energy consumption level of the air compressor by optimizing the gas-liquid two-phase flow pattern.

[0036] In some specific embodiments, the speed-reducing component 8 includes a third air inlet 81 and multiple third air outlets 82. The third air inlet 81 is communicated with the air outlet 21, and multiple third air outlets 82 are all communicated with the third air inlet 81. The communication design between the third air inlet 81 and the multiple third air outlets 82 in the speed-reducing component 8, and the aperture of the third air outlet 82 being smaller than that of the third air inlet 81 can form a throttling effect. When the high-speed mixed gas generated by the compression in the stator 2 cavity enters the third air inlet 81 of the speed-reducing component 8 from the air outlet 21 and then disperses and flows out through the multiple third air outlets 82, on the one hand, the flow direction of the mixed gas after passing through the multiple third air outlets 82 is a scattered state spreading in all directions, and on the other hand, the mixed gas can undergo multiple baffle flows inside the speed-reducing component 8, thereby dispersing the mixed gas and separating some of the oil and water during the dispersion process and separating the oil.

[0037] The cross-sectional area of the gas flow increases. According to the principles of fluid mechanics, the flow velocity is significantly reduced, enabling the mixed gas to enter the subsequent oil-gas separation stage at a lower speed, creating conditions for efficient oil-gas separation. When the mixed gas with a lower flow velocity enters the oil-gas separation device, the oil droplets, due to the reduced inertia, are more likely to be separated from the gas under the action of gravity, filtration, etc. The flow velocity reducing component 8 allows the oil droplets more time to adhere to the filter element 83 or the inner wall of the cavity, reducing the oil content in the gas flowing into the subsequent separation device, thereby improving the efficiency of the entire oil-gas separation system, reducing the oil content in the compressed air, and enhancing the quality of the compressed air.

[0038] In addition, the connection layout of multiple third air outlet holes 82 and the third air inlet hole 81 enables the mixed gas to flow out evenly in a dispersed manner, avoiding excessively high or low local flow velocities, ensuring smooth gas flow within the cavity, and reducing pressure fluctuations. The stable air flow helps improve the stability and reliability of the air compressor operation, ensuring the consistency of the compressed air supply quality.

[0039] In some specific embodiments, the aperture of the third air outlet hole 82 is smaller than that of the third air inlet hole 81. According to the fluid mechanics continuity equation, when the gas flows in from the third air inlet hole 81 with a larger aperture and flows out through the third air outlet hole 82 with a smaller aperture, the cross-sectional area of the flow suddenly decreases, and the gas flow velocity will be forced to decrease due to the "bottleneck effect". For example, assuming the gas flow velocity in the third air inlet hole 81 is 20 m / s, after passing through the third air outlet hole 82 with the aperture reduced to 1 / 3, the flow velocity can be reduced to approximately 6 - 7 m / s. When the mixed gas with a lower flow velocity enters the oil-gas separation device, the motion inertia of the oil droplets weakens, and they are more likely to be separated from the gas by relying on gravity, centrifugal force, or filtration, directly improving the oil-gas separation efficiency.

[0040] After the gas flow velocity decreases, the residence time of the oil droplets in the flow velocity reducing component 8 is extended, increasing the probability of mutual collision and coalescence of the oil droplets. The smaller aperture of the third air outlet hole 82 also causes local gas turbulence, enabling the oil droplets to come into frequent contact under the disturbance of the irregular air flow, accelerating the aggregation into larger oil droplets. These larger oil droplets are more likely to settle to the bottom of the cavity due to gravity and flow back to the oil storage cavity through the oil return channel, thereby reducing the oil content entering the subsequent separation stage.

[0041] Multiple third air outlet holes 82 with small apertures can disperse the concentrated air flow from the third air inlet hole 81 into multiple fine streams, avoiding air flow deviation or vortex phenomena caused by a single large-aperture third air outlet hole 82. The uniform air flow distribution helps stabilize the pressure in each region within the flow velocity reducing component 8, enabling the gas to flow smoothly within the cavity, reducing the interference of pressure fluctuations on the oil-gas separation effect, and ensuring the stability and reliability of the air compressor operation.

[0042] In some specific embodiments, a filter element 83 is provided in the third air inlet hole 81. There are a large number of fine pores and irregular structures on the surface of the filter element 83. When the mixed gas passes through, gas molecules need to continuously collide with and bypass the pore walls of the filter material, enabling the mixed gas to undergo multiple baffle flows inside the deceleration component 8. As a result, the mixed gas can be dispersed, and during the dispersion process, some of the oil and water can be separated, with the oil being separated out, causing the flow direction of the mixed gas after passing through multiple third air outlet holes 82 to be a scattered state spreading in all directions. The mechanical hindrance formed by the large number of fine pores and irregular structures on the surface of the filter element 83 increases the resistance of gas flow, leading to a significant increase in its residence time in this area. This allows the mixed gas to enter the subsequent oil-gas separation link at a lower speed. When the mixed gas with a lower flow rate enters the oil-gas separation device, the oil droplets have a reduced inertia and are more likely to be separated from the gas under the action of gravity, filtration, etc. The oil droplets have more time to adhere to the filter element 83, reducing the oil content in the gas flowing into the subsequent separation device, thereby improving the efficiency of the entire oil-gas separation system, reducing the oil content in the compressed air, and enhancing the quality of the compressed air.

[0043] Optionally, the filter element 83 can be a metal mesh. Optionally, the filter element 83 is a sintered metal mesh. Optionally, the filter element 83 is in a honeycomb shape. In some specific embodiments, the aperture D1 of the third air inlet hole 81 satisfies: 20 mm ≤ D1 ≤ 30 mm. Setting the aperture of the third air inlet hole 81 between 20 mm and 30 mm can ensure sufficient gas flow through, avoiding excessive intake resistance due to too small an aperture and affecting the exhaust volume of the air compressor.

[0044] In some specific embodiments, the aperture D2 of the third air outlet hole 82 satisfies: 2.5 mm ≤ D2 ≤ 3.5 mm. Controlling the aperture of the third air outlet hole 82 between 2.5 mm and 3.5 mm forms a large aperture difference with the third air inlet hole 81, which can effectively achieve throttling and pressure reduction. According to Bernoulli's equation, when the gas flows from the third air inlet hole 81 with a large aperture to the third air outlet hole 82 with a small aperture, the flow rate increases significantly and the pressure decreases. After passing through the deceleration component 8, the gas flow rate can be stably reduced from the initial 30 - 50 m / s to 3 - 5 m / s, meeting the requirements of the oil-gas separation device for low-flow-rate gas and ensuring efficient oil-gas separation.

[0045] The vehicle provided by the embodiments of the present disclosure includes the air compressor provided by the embodiments of the present disclosure. Since the vehicle provided by the embodiments of the present disclosure and the air compressor provided by the embodiments of the present disclosure have the same advantages, they will not be elaborated here.

[0046] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in the disclosure of the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this embodiment can be achieved, and no limitations are imposed herein.

[0047] In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present disclosure, "a plurality" means two or more, unless otherwise specifically defined.

[0048] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. An air compressor, characterized in that, Comprising: A housing (1) with a cavity inside. A stator (2) disposed in the cavity. A rotor (3) rotatably mounted in an eccentric hole of the stator (2). A sliding vane (4) mounted in a mounting groove of the rotor (3). The housing (1), the stator (2), the rotor (3) and the sliding vane (4) form an intake chamber and a compression chamber. A plurality of air outlets (21) communicating with the compression chamber are provided on the side wall of the stator (2). A first oil-gas separation device (5) having a first intake hole (51) and a first outlet hole (52), and the first intake hole (51) communicates with the air outlet (21). A second oil-gas separation device (6) having a second intake hole (61) and a second outlet hole (62), and the second intake hole (61) communicates with the first outlet hole (52).

2. The air compressor according to claim 1, characterized in that, The first oil-gas separation device (5) includes a first cylinder body (53), a first oil separation core (54) and a first cover body (56). The first oil separation core (54) is disposed in the first cylinder body (53) and forms a first annular space between the first oil separation core (54) and the first cylinder body (53). The first cover body (56) seals the upper end of the first cylinder body (53). The first intake hole (51) communicating with the inner hole of the first oil separation core (54) is provided on the first cover body (56). The first cylinder body (53) is provided with the first outlet hole (52) communicating with the first annular space.

3. The air compressor according to claim 2, characterized in that, The second oil-gas separation device (6) includes a second cylinder body (63), a second oil separation core (64) and a second cover body (66). The second oil separation core (64) is disposed in the second cylinder body (63) and forms a second annular space between the second oil separation core (64) and the second cylinder body (63). The second cover body (66) seals the upper end of the second cylinder body (63). The second intake hole (61) communicating with the first outlet hole (52) is provided on the second cover body (66). The second cylinder body (63) is provided with the second outlet hole (62) communicating with the second annular space.

4. The air compressor according to claim 3, characterized in that, The first cylinder body (53) is provided with a first oil return hole (55) communicating with the first annular space, and the second cylinder body (63) is provided with a second oil return hole (65) communicating with the second annular space.

5. The air compressor according to claim 4, characterized in that, The first oil return hole (55) communicates with a first pipeline (71), the second oil return hole (65) communicates with a second pipeline (72), and the compression chamber is provided with a third pipeline (73). Both the first pipeline (71) and the second pipeline (72) communicate with the third pipeline (73).

6. The air compressor according to claim 3, characterized in that Both the first oil separation core (54) and the second oil separation core (64) include multiple layers of filter materials.

7. The air compressor according to claim 1, characterized in that, A one-way valve is provided between the first outlet hole (52) and the second intake hole (61).

8. The air compressor according to claim 1, wherein, It further includes a speed reduction component (8) disposed in the cavity, and the speed reduction component (8) is disposed between the air outlet (21) and the first intake hole (51).

9. The air compressor according to claim 8, characterized in that The retarder component (8) includes a third air inlet hole (81) and a plurality of third air outlet holes (82). The third air inlet hole (81) is communicated with the air outlet (21), and the plurality of third air outlet holes (82) are all communicated with the third air inlet hole (81).

10. A vehicle, characterized in that, Including the air compressor according to any one of claims 1 to 9.

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