Compressor and air compressor system

Abstract

The utility model belongs to compressor equipment technical field, concretely relates to a kind of compressor and air compressor system, the compressor casing has two directions of radial and axial, multiple groups of air exchange port are equipped on the casing, and each group of air exchange port includes air inlet and air outlet respectively arranged on the opposite sides of the casing along radial direction.In the inside of the casing, a group of heat-dissipating flow channels are arranged around the stator assembly, the heat-dissipating flow channels include multiple radial flow channels, each radial flow channel extends along the radial direction of the casing, and the two ends of each radial flow channel are respectively communicated with the air inlet and air outlet in each group of air exchange port.Through the above structure, cooling gas can realize through-flow along multiple radial paths, bypass the limitation of traditional axial cooling path, improve the heat dissipation efficiency, and is especially suitable for high heat density, strict cooling requirement compressor system.

Description

Technical Field

[0001] This utility model belongs to the field of compressor manufacturing technology, and in particular relates to a compressor and air compressor system. Background Technology

[0002] Magnetic levitation technology, due to its contactless operation, low noise, and high efficiency, is widely used in magnetic levitation air compressors, blowers, refrigeration compressors, and vacuum pumps. As equipment performance continues to improve, the power density of magnetic levitation units is constantly increasing, leading to a significant increase in the heat generated during operation and making heat dissipation a growing concern. Currently, magnetic levitation compressors often use open-loop cooling with non-phase-change media such as air. However, because this type of cooling medium has a small heat capacity, it is difficult to efficiently remove the large amount of heat generated inside the compressor, especially in high-speed, high-power-density applications, where the cooling effect often falls short of requirements.

[0003] In existing technologies, to achieve compressor cooling, the air inlet and outlet, typically located at opposite ends of the compressor's axial direction, are usually positioned on the casing. Cooling air enters the casing through the inlet, initially flowing radially inward to dissipate heat from the ends of the stator windings. It then enters the gap between the stator and the shaft, flowing axially within this gap to cool the compressor's stator core. Finally, it flows to the other end of the stator's axial direction to cool the other end of the stator windings before exiting through the outlet. This cooling method results in an excessively long axial cooling path, leading to a gradual increase in the airflow temperature. The significant temperature difference between the initial and final sections of the cooling channel results in uneven heat dissipation across different areas of the compressor, leading to low cooling efficiency. Utility Model Content

[0004] The purpose of this invention is to at least solve the problem of low heat dissipation efficiency in magnetic levitation compressors during operation. This objective is achieved through the following technical solution: The first aspect of this utility model provides a compressor, comprising: The housing has radial and axial dimensions, and the housing is provided with multiple sets of ventilation ports. Each set of ventilation ports includes an air inlet and an air outlet respectively located on opposite sides of the housing along the radial direction. The stator assembly is located inside the housing; The housing has a heat dissipation channel that surrounds the stator assembly. The heat dissipation channel includes multiple radial channels that extend radially. Each radial channel is connected at both ends to the air inlet and the air outlet of each group of air vents.

[0005] According to this invention, the compressor has air inlets and outlets on opposite sides of the housing along the radial direction, and multiple radially extending heat dissipation channels inside the housing. This allows cooling gas to flow directly radially from the air inlet of each group of air inlets into the corresponding radial channel, pass through the heat dissipation area surrounding the stator assembly, and exit from the outlet on the other side, thus forming a unidirectional radial cooling path. Compared to the prior art where cooling gas must first enter radially from the air inlet at one end of the motor and then axially pass through the motor's interior to exit at the other end, this invention significantly shortens the airflow path, reduces flow resistance, avoids axial heat accumulation, effectively improves heat dissipation efficiency, and achieves rapid heat dissipation around the stator assembly, thereby improving the overall thermal management performance and reliability of the compressor.

[0006] In addition, the compressor according to this utility model may also have the following additional technical features: In some embodiments of the present invention, the stator assembly is formed with a plurality of axial flow channels, which extend along the axial direction and are respectively connected to each of the radial flow channels.

[0007] In some embodiments of this utility model, the stator assembly includes two stator cores and a stator winding wound around the two stator cores, with the two stator cores spaced apart along the axial direction; The radial flow channel includes: The first channel is disposed between the two stator cores along the axial direction; The second channel is provided on one side of the stator assembly along the axial direction; The third channel is located along the axial direction on the side of the stator assembly opposite to the second channel.

[0008] In some embodiments of this utility model, each stator core has teeth arranged sequentially at intervals along the circumference of the housing, the stator winding is wound around the teeth, and an axial flow channel is formed between two adjacent teeth.

[0009] In some embodiments of this utility model, the compressor further includes: The first air duct is connected to the housing. The first air duct includes a first branch and a second branch. The air outlet of the first branch is connected to the air inlet of the second channel, and the air outlet of the second branch is connected to the air inlet of the third channel. The second air duct is connected to the housing, and the air outlet of the second air duct is connected to the air inlet of the first channel.

[0010] In some embodiments of this utility model, cooling water channels are formed in the wall thickness of the housing, and the cooling water channels are arranged around the outer peripheral wall of a portion of the stator assembly.

[0011] In some embodiments of this utility model, the cooling water channel and the air exchange port are staggered.

[0012] In some embodiments of this utility model, a water channel baffle is provided inside the cooling water channel, and the water channel baffle extends radially.

[0013] A second aspect of this invention provides an air compressor system, which includes the compressor described above. Attached Figure Description

[0014] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic diagram of the structure of a partial compressor according to an embodiment of the present invention is shown; Figure 2 A schematic half-sectional view of a portion of the compressor according to an embodiment of the present invention is shown. Figure 3 A schematic cross-sectional view of a portion of a compressor according to an embodiment of the present invention is shown from a first perspective. Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 A first-view view of a portion of a compressor according to an embodiment of the present invention is shown schematically; Figure 6 for Figure 5 A cross-sectional view of the BB plane; Figure 7 for Figure 6 A magnified view of a section at point C; Figure 8 A cross-sectional view of a portion of the compressor according to an embodiment of the present invention is schematically shown from a second perspective; Figure 9 for Figure 8 A cross-sectional view of the DD plane; Figure 10 A schematic diagram of the compressor according to an embodiment of the present invention is shown.

[0015] The attached figures are labeled as follows: 34. Compressor; 341. Housing; 34101. Air inlet; 34102. Air outlet; 3411. Radial flow channel; 34111. First channel; 34112. Second channel; 34113. Third channel; 3412. Cooling water channel; 34121. Water inlet; 34122. Water outlet; 3413. Water channel baffle; 342. Rotor; 343. Stator assembly; 3431. Stator core; 34311. Tooth section; 34312. Axial flow channel; 344, First air duct; 3441, First branch; 3442, Second branch; 345, Second air duct. Detailed Implementation

[0016] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0017] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0018] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0019] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0020] like Figures 1 to 10 As shown, this embodiment proposes a compressor 34, including a housing 341 and a stator assembly 343 disposed inside the housing 341. The housing 341 has a radial (e.g., Figure 3 (as indicated by the middle arrow x) and axial (as shown by...) Figure 3 (As indicated by the middle arrow y) in two directions, and used to define the overall structural frame of the compressor 34. To achieve efficient cooling, the housing 341 is provided with multiple sets of air exchange ports. Each set of air exchange ports includes an air inlet 34101 and an air outlet 34102 respectively disposed on opposite sides of the housing 341 in the radial direction, for forming a cooling airflow path through the housing 341. Inside the housing 341, a set of heat dissipation channels is arranged around the stator assembly 343. The heat dissipation channels include multiple radial channels 3411, each radial channel 3411 extending in the radial direction of the housing 341. Specifically, the two ends of each radial channel 3411 are connected to the air inlet 34101 and the air outlet 34102 in each set of air exchange ports, respectively, so that cooling gas can enter from the air inlet 34101 on one side of the housing 341, flow radially through the heat dissipation channels through the outer peripheral area of ​​the stator assembly 343, and then be discharged from the air outlet 34102 on the other side. With the above structure, the cooling gas can flow through multiple radial paths, bypassing the limitations of the traditional axial cooling path and improving heat dissipation efficiency. It is particularly suitable for compressor 34 systems with high heat density and strict cooling requirements.

[0021] According to the compressor 34 of this invention, an air inlet 34101 and an air outlet 34102 are respectively provided on opposite sides of the housing 341 in the radial direction. Multiple radially extending heat dissipation channels are provided inside the housing 341. This allows cooling gas to flow directly radially from the air inlet 34101 in each group of air inlets into the corresponding radial channel 3411, pass through the heat dissipation area surrounding the stator assembly 343, and then exit from the air outlet 34102 on the other side, thus forming a unidirectional radial cooling path. Compared to the prior art where cooling gas must first enter radially from the air inlet 34101 at one end of the motor and then axially pass through the motor interior to exit at the other end, this invention significantly shortens the airflow path, reduces flow resistance, avoids axial heat accumulation, effectively improves heat dissipation efficiency, and achieves rapid heat dissipation around the stator assembly 343, thereby improving the overall thermal management performance and reliability of the compressor 34.

[0022] In some embodiments, a plurality of axial flow channels 34312 are formed on the stator assembly 343. These axial flow channels 34312 extend along the axial direction of the housing 341. The axial flow channels 34312 can be disposed on the outer periphery of the stator core 3431 or in the non-flux working area of ​​the stator assembly 343, or they can be disposed inside the stator assembly 343, for guiding the axial flow of cooling gas in the stator assembly 343. Specifically, each axial flow channel 34312 is connected to a corresponding plurality of radial flow channels 3411, and the plurality of radial flow channels 3411 can be connected to each other through the axial flow channels 34312. In some embodiments, the stator assembly 343 includes two stator cores 3431 and a stator winding wound between the two stator cores 3431. The two stator cores 3431 are spaced apart along the axial direction of the housing 341 to form the magnetic flux loop of the motor and to accommodate the stator winding, thus completing the construction of the excitation structure. To achieve efficient cooling, the stator assembly 343 is provided with multiple radial flow channels 3411, including a first channel 34111, a second channel 34112, and a third channel 34113. The first channel 34111 is axially located between the two stator cores 3431 and adjacent to the stator winding. This channel is used to cool the concentrated area of ​​the stator winding, which helps to control the temperature rise of the electromagnetic heating core area. The second channel 34112 is axially located on one side of the stator assembly 343, preferably on the outer periphery of one of the stator cores 3431, and is used to guide cooling gas to cool the end of the stator core 3431. The third channel 34113 is axially disposed on the side of the stator assembly 343 opposite to the second channel 34112, i.e., located at the outer periphery of the other stator core 3431, to achieve symmetrical heat dissipation at both ends. Through this arrangement, cooling gas can enter multiple rationally distributed radial channels from different axial positions, achieving three-dimensional cooling of the central region of the stator winding and the ends of the two cores, enhancing the heat exchange coverage, and adapting to the spatial distribution characteristics of different heat sources during compressor 34 operation.

[0023] Specifically, each stator core 3431 has a plurality of teeth 34311 arranged sequentially at intervals along the circumferential direction of the housing 341. The teeth 34311 extend from the stator core 3431 towards the inner diameter, forming a basic structure for electromagnetic excitation. The stator winding is wound around the teeth 34311 and distributed in multiple stator slots to form a complete three-phase winding system for generating a rotating magnetic field after energization. Preferably, an axial flow channel 34312 is formed between two adjacent teeth 34311, that is, a gas flow space is reserved in the slot area between every two adjacent teeth 34311. This axial flow channel 34312 extends along the axial direction of the compressor 34 and is connected to the aforementioned radial flow channel 3411. By providing axial flow channels 34312 between the teeth 34311 of each stator core 3431, cooling gas can flow freely in the axial direction in the slot region between the winding and the teeth 34311, achieving an effective gas cooling path in the stator slot region without damaging the winding insulation structure. Simultaneously, the axial flow channel 34312 provides an independent airflow channel for cooling gas to bypass the rotor 342 and preferentially cool the stator slot region, avoiding frictional losses caused by direct radial airflow impacting the high-speed rotor 342.

[0024] In some embodiments, the compressor 34 further includes a first air duct 344 and a second air duct 345, which are respectively connected to the housing 341 and used to provide cooling gas to the heat dissipation channels. The first air duct 344 includes a first branch 3441 and a second branch 3442, used to divert cooling gas to different cooling areas. The outlet of the first branch 3441 is connected to the inlet 34101 of the second channel 34112, used to supply air to the radial cooling channel on one side of the stator assembly 343. The outlet of the second branch 3442 is connected to the inlet 34101 of the third channel 34113, used to supply air to the radial channel on the other side of the stator assembly 343. This structure allows cooling gas to be injected from both sides of the compressor 34, cooling the ends of the stator windings of the stator assembly 343 in pairs. The outlet of the second air duct 345 is connected to the inlet 34101 of the first channel 34111, supplying air to the first channel 34111 located between the two stator cores 3431, thereby achieving direct cooling of the central area of ​​the stator winding. Through this structural design, the first air duct 344 and the second air duct 345 provide directional branching airflow to multiple cooling channels at different parts of the stator assembly 343, giving the airflow a clear spatial direction and helping to establish a stable cooling gas path. This distributed air supply structure not only improves the overall heat dissipation effect but also allows for independent adjustment of multiple channels, meeting the differentiated cooling needs of different heat load areas.

[0025] like Figure 8 As shown, specifically, the second air duct 345 is arranged in a ring around the housing 341, that is, the second air duct is arranged in a closed loop along the circumference of the housing 341, forming a ring structure around the axis of the compressor 34, which facilitates multi-point uniform air supply. Preferably, the second air duct 345 is connected to at least two first channels 34111, that is, the ring air duct is connected to multiple first channels 34111 located in the middle of the stator assembly 343 through multiple airflow interfaces, so that cooling gas can enter the corresponding first channel 34111 from different positions of the second air duct 345. Through the above structural design, cooling gas can enter the middle region of the stator assembly 343 from multiple circumferentially distributed positions, realizing multi-point parallel air supply and uniform cooling distribution, avoiding problems such as uneven heat and unstable flow caused by single-point air supply. The ring air duct structure also has good structural compactness and integration, and is suitable for use in the space-constrained compressor 34 system.

[0026] Understandably, the cooling gas flow path in this embodiment is as follows: First, a portion of the cooling gas enters the radial flow channels 3411 on both sides of the housing 341 from the first branch 3441 and the second branch 3442 respectively, flows radially, passes through the end region of the stator assembly, and is discharged from the corresponding air outlet 34102. Another portion of the cooling gas is simultaneously fed into multiple first channels 34111 from multiple points in the second air duct 345. After entering the first channels 34111, the cooling gas flows radially to the air outlet 34102 in the middle region of the stator and is discharged. It should be noted that most of the cooling gas in the second air duct 345 is distributed along the axial flow channel 34312 in the tooth groove region during the flow process, allowing heat to diffuse laterally and transfer axially within the stator slots, finally merging with the radial flow channels 3411 on both sides and being discharged.

[0027] like Figure 4 and Figure 7 As shown, in some embodiments, cooling channels 3412 are formed within the wall thickness of the housing 341, meaning the cooling channels 3412 are embedded within the solid structure of the housing 341 body, rather than being an external additional structure. Specifically, the cooling channels 3412 are arranged around the outer peripheral wall of a portion of the stator assembly 343, preferably an annular or arc-shaped channel structure, distributed circumferentially along the housing 341, forming an enclosed arrangement on the outside of the stator assembly 343. The cooling channels 3412 can be integrally formed with the housing 341 by casting, welding, slotting and sealing, or constructed as a sandwich structure. Through the above structural design, the coolant (such as water or cooling oil) can circulate within the wall of the housing 341, directly exchanging heat with the outer periphery of the stator assembly 343, thereby effectively removing the heat generated by the stator core 3431 and stator windings during operation. Compared to traditional air-cooled structures, this water-cooling method has advantages such as high heat exchange efficiency, precise temperature rise control, and small footprint, making it particularly suitable for high power density or hermetic compressor systems.

[0028] Furthermore, the cooling water channel 3412 is staggered from the air exchange port, meaning that the location of the cooling water channel 3412 within the wall thickness of the casing 341 avoids the area where the air exchange port is located, and the two do not overlap or interfere with each other spatially. This avoids the air exchange port from penetrating the water channel structure, ensures the sealing and structural integrity of the cooling water channel 3412, guarantees the continuity of the water flow path, and avoids turbulence or thermal resistance caused by gas channel interference. At the same time, it is beneficial to the strength design and layered arrangement of the casing 341 structure, improving the rationality of the cooling system layout and manufacturing feasibility. In summary, by staggering the air exchange port and the water channel, the independence and synergy of the air cooling and water cooling channels are taken into account, which helps to build an efficient and safe multi-channel composite cooling system.

[0029] like Figure 7As shown, further, a water channel baffle 3413 is provided within the cooling water channel 3412 to optimize the flow path and heat exchange efficiency of the coolant within the water channel. Preferably, the water channel baffle 3413 is arranged along the radial direction of the rotor 342, that is, the water channel baffle 3413 extends from the inner wall of the housing 341 towards the outer wall, dividing the annular or arc-shaped cooling water channel 3412 radially. The water channel baffle 3413 can be an integrally formed structure or fixed to the inner wall of the water channel by insert welding. In this embodiment, by guiding or segmenting the flow path of the coolant to form an "S-shaped" or "U-shaped" flow, the heat exchange area inside the water channel is increased, the risk of coolant short-circuiting or deflection is reduced, the uniformity of fluid distribution around the stator is improved, and the coolant is fully distributed around the housing 341, thereby improving the overall heat exchange efficiency and enhancing the water cooling effect in the stator region. By setting up water channel baffles 3413, the water cooling system is not only structurally compact and integrated, but also achieves refined design at the flow control level, which helps to cope with continuous and stable operation under high heat load scenarios.

[0030] Specifically, adjacent baffles are staggered in axial position. Through the above arrangement, multiple water channel baffles 3413 intersect and define a tortuous water channel path, so that the coolant flows in an "S" shape or "U" shape in the water channel, thereby extending the actual flow path of the coolant.

[0031] like Figure 5 As shown, specifically, the housing 341 is provided with an inlet 34121 and an outlet 34122 for the input and discharge of coolant, respectively. The inlet 34121 and outlet 34122 can be located on the outer surface of the housing 341 for easy connection to an external water-cooling device. The two ends of the cooling channel 3412 are connected to the inlet 34121 and outlet 34122, respectively, thus forming a closed cooling circuit. Coolant flows into the cooling channel 3412 through the inlet 34121, circulates along a predetermined path within the wall thickness of the housing 341, cooling and exchanging heat with the stator assembly 343 enclosing it, and finally discharges through the outlet 34122 to enter the external cooling system for heat release or recycling.

[0032] It is understandable that the first branch 3441 and the second branch 3442 are connected by a main pipe, meaning that the main pipe is simultaneously connected to the air inlet ends of both the first branch 3441 and the second branch 3442, forming an integrated cooling gas supply path. Through this structure, the main pipe is used to uniformly supply cooling gas to both the first branch 3441 and the second branch 3442, allowing cooling media from the same gas source to simultaneously enter both ends of the motor, thereby dissipating heat radially into the motor's interior.

[0033] Understandably, the first air duct 344 is connected to a high-power fan to continuously supply high-flow, high-pressure cooling gas to the first air duct 344, ensuring that the cooling gas can quickly enter the second channel 34112 and the third channel 34113 radially from both sides of the casing 341, providing powerful cooling to the areas at both ends of the motor. Simultaneously, the second air duct 345 is connected to a low-power fan to assist in driving the cooling gas from the second air duct 345 into the first channel 34111, thereby achieving supplemental cooling of the middle area of ​​the motor.

[0034] This embodiment also proposes an air compressor system, including the compressor 34 described above.

[0035] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A compressor, characterized in that, include: The housing has radial and axial dimensions, and the housing is provided with multiple sets of ventilation ports. Each set of ventilation ports includes an air inlet and an air outlet respectively located on opposite sides of the housing along the radial direction. The stator assembly is located inside the housing; The housing has a heat dissipation channel that surrounds the stator assembly. The heat dissipation channel includes multiple radial channels that extend radially. Each radial channel is connected at both ends to the air inlet and the air outlet of each group of air vents.

2. The compressor according to claim 1, characterized in that, The stator assembly has a plurality of axial flow channels that extend along the axial direction and are connected to each of the radial flow channels.

3. The compressor according to claim 2, characterized in that, The stator assembly includes two stator cores and a stator winding wound around the two stator cores, with the two stator cores spaced apart along the axial direction; The radial flow channel includes: The first channel is disposed between the two stator cores along the axial direction; The second channel is provided on one side of the stator assembly along the axial direction; The third channel is located along the axial direction on the side of the stator assembly opposite to the second channel.

4. The compressor according to claim 3, characterized in that, Each of the stator cores has teeth spaced apart in sequence along the circumference of the housing, the stator winding is wound around the teeth, and an axial flow channel is formed between two adjacent teeth.

5. The compressor according to claim 3, characterized in that, The compressor also includes: The first air duct is connected to the housing. The first air duct includes a first branch and a second branch. The air outlet of the first branch is connected to the air inlet of the second channel, and the air outlet of the second branch is connected to the air inlet of the third channel. The second air duct is connected to the housing, and the air outlet of the second air duct is connected to the air inlet of the first channel.

6. The compressor according to claim 5, characterized in that, The second air duct is arranged around the housing and is connected to at least two of the first channels.

7. The compressor according to any one of claims 1 to 6, characterized in that, Cooling channels are formed in the wall thickness of the housing, and the cooling channels are arranged around the outer peripheral wall of part of the stator assembly.

8. The compressor according to claim 7, characterized in that, The cooling water channel is staggered from the air exchange port.

9. The compressor according to claim 8, characterized in that, The cooling water channel is provided with a water channel baffle, which extends radially.

10. An air compressor system, characterized in that, The air compressor system includes a compressor according to any one of claims 1 to 9.

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