Air compression system and air compression equipment

Abstract

The invention relates to the technical field of compressors, and discloses an air compression system and air compression device.The air compression system comprises a plurality of compression units and a driving assembly, each compression unit is provided with an air suction port and an air outlet, air enters the compression units through the air suction ports to be pressurized and is discharged out of the compression units through the air outlets, and the driving assembly drives the multiple compression units. Environmental air sequentially passes through the multiple compression units to be pressurized, and at least one cooling mechanism is arranged between the upstream compression unit and the downstream compression unit in the flowing direction of the air. The multiple compression units are arranged, and the cooling mechanisms are arranged between the adjacent compression units, so that the increased air temperature after each stage of compression can be reduced, the air is restored to the low temperature before entering the next stage of compression unit, rapid increase of the air temperature in the compression process is reduced, the compression efficiency is improved, and the compression efficiency is improved. And the energy consumption is reduced. In addition, by reasonably distributing compression ratios of all stages, the overall performance and stability of the system are further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to an air compression system and an air compression device. BACKGROUND

[0002] The part provided in this part is only background information related to the present disclosure, which is not necessarily prior art.

[0003] The compression mode of a single compression stage is difficult to effectively cope with high pressure demand, and often needs multiple compressions to reach the target pressure. When air is compressed to a higher pressure, its temperature will rise significantly, which not only reduces the density of air and affects the compression efficiency, but also may cause overheating of the equipment, damage of parts and other problems, thereby reducing the service life and operation reliability of the equipment. SUMMARY

[0004] The purpose of the present application is to at least solve the problem of high air temperature during multi-stage compression, which affects the service life and operation reliability of the equipment. The purpose is achieved by the following technical scheme:

[0005] The first aspect of the present application proposes an air compression system, comprising:

[0006] A plurality of compression units, each compression unit having an air inlet and an air outlet, air entering the compression unit via the air inlet for pressurization, and the compression unit discharging from the air outlet;

[0007] A driving assembly driving a plurality of compression units, ambient air passing through a plurality of compression units in sequence for pressurization, and at least one cooling mechanism being provided between the upstream compression unit and the downstream compression unit along the flow direction of the air.

[0008] The air compression system of the present application can reduce the temperature of the air raised after each compression by arranging a plurality of compression units and configuring a cooling mechanism between adjacent compression units, so that the air returns to a lower temperature before entering the next compression unit. Not only does it reduce the sharp rise in air temperature during compression, but it also avoids problems such as overheating of the equipment, damage of parts and degradation of lubricating oil performance caused by high temperature, but also improves the compression efficiency and reduces the energy consumption. In addition, by reasonably distributing the compression ratio of each stage, the overall performance and stability of the system are further improved.

[0009] In addition, the air compression system according to the present application can also have the following additional technical features:

[0010] In some embodiments of the present application, the at least one cooling mechanism comprises a first cooling mechanism, the first cooling mechanism comprising a first intercooler and a first cooling pipeline, the first intercooler being provided with a first air inlet and a first air outlet, the first cooling pipeline comprising a first cooling branch and a second cooling branch, two ends of the first cooling branch being in communication with the first air inlet and the compression unit upstream respectively, two ends of the second cooling branch being in communication with the first air outlet and the compression unit downstream respectively.

[0011] In some embodiments of the present application, the air compression system comprises a compressor body, the compressor body comprising a compressor shell and a primary compression unit and a secondary compression unit provided at two axial ends of the compressor shell, the driving assembly being provided in the compressor shell, the primary compression unit being provided with a primary air inlet and a primary air outlet, the secondary compression unit being provided with a secondary air inlet, the primary air inlet being configured to communicate with the environment, the first air inlet being in communication with the primary air outlet, the first air outlet being in communication with the secondary air inlet.

[0012] In some embodiments of the present application, the first intercooler comprises a first intercooler shell and a first heat exchanger, the first intercooler shell being provided with the first air inlet and the first air outlet, the first intercooler shell being provided with at least one first heat exchanger.

[0013] In some embodiments of the present application, the first air inlet and the first air outlet are oppositely arranged at two sides of the first intercooler shell, and / or the axis of the first air outlet is perpendicular to the axis of the first air inlet.

[0014] In some embodiments of the present application, the primary air inlet is arranged along the axial direction of the compressor body, and / or the primary air outlet is arranged along the tangential direction of the outer wall surface of the compressor body.

[0015] In some embodiments of the present application, the axis of the primary air outlet is on the same straight line as the axis of the first air inlet.

[0016] In some embodiments of the present application, the upstream end of the primary air inlet is provided with a filter, the filter being configured to filter the gas entering the primary air inlet.

[0017] In some embodiments of the present application, the air compression system further comprises a second cooling mechanism, the first cooling mechanism being arranged on one side of the compressor body in a direction perpendicular to the axial direction of the compressor body, the second cooling mechanism being arranged on the other side of the compressor body, the first cooling mechanism and the second cooling mechanism being in communication with the compressor body respectively.

[0018] In some embodiments of the present invention, the first cooling mechanism further includes a first liquid inlet pipe and a first liquid outlet pipe, and the first intercooler housing is further provided with a first liquid inlet and a first liquid outlet, one end of the first liquid inlet pipe is configured as a coolant inlet for communicating with an external coolant, and the other end is communicated with the first liquid inlet, one end of the first liquid outlet pipe is configured as a coolant outlet for communicating with the external coolant, and the other end is communicated with the first liquid outlet.

[0019] In some embodiments of the present invention, the air compression system also includes a three-stage compression unit, the two-stage compression unit also includes a two-stage air outlet, the second cooling mechanism is provided with a second air inlet and a second air outlet, the second air inlet is connected to the two-stage air outlet, and the second air outlet is connected to the three-stage compression unit.

[0020] In some embodiments of the present invention, the axis of the secondary air outlet and the axis of the second air inlet are located on the same straight line.

[0021] In some embodiments of the present invention, the second cooling mechanism includes a second intercooler, the second intercooler includes a second intercooler shell and a second heat exchanger, the second intercooler shell is provided with the second air inlet and the second air outlet, and at least one second heat exchanger is provided in the first intercooler shell.

[0022] In some embodiments of the present invention, the second cooling mechanism further includes a second liquid inlet pipe and a second liquid outlet pipe, and the second intercooler shell is further provided with a second liquid inlet and a second liquid outlet, the two ends of the second liquid inlet pipe are respectively connected to the first liquid inlet pipe and the second liquid inlet, and the two ends of the second liquid outlet pipe are respectively connected to the first liquid outlet pipe and the second liquid outlet.

[0023] In some embodiments of the present invention, the second air inlet and the second air outlet are arranged oppositely on two sides of the second intercooler housing, and / or the axis of the second air outlet is parallel to the axis of the second air inlet.

[0024] In some embodiments of the present invention, the secondary air intake port is arranged along the axial direction of the compressor body, and / or the secondary air outlet port is arranged along the tangential direction of the outer wall surface of the compressor body.

[0025] In some embodiments of the present invention, the three-stage compression unit is provided with a three-stage air intake and a three-stage air outlet, the three-stage air intake is connected to the second air outlet, and the three-stage air outlet is used to connect to the user-end interface.

[0026] In some embodiments of the present application, the air compression system further comprises a first connecting pipe, the third suction port is communicated with the second gas outlet through the first connecting pipe, and the first connecting pipe is an arc-shaped pipe.

[0027] In some embodiments of the present application, along the axial direction of the compressor body, the third suction port is closer to the second compression unit than to the first compression unit.

[0028] In some embodiments of the present application, the air compression system further comprises a second connecting pipe, the third gas outlet is communicated with the user interface through the second connecting pipe, and a pressure relief assembly is arranged on the second connecting pipe.

[0029] In some embodiments of the present application, the pressure relief assembly comprises a pressure relief pipe and a pressure relief valve arranged on the pressure relief pipe, one end of the pressure relief pipe is communicated with the second connecting pipe, the pressure relief pipe extends upward from the second connecting pipe, and a pressure relief port is arranged on the end of the pressure relief pipe away from the second connecting pipe.

[0030] Another aspect of the present application provides an air compression device, comprising a casing and an air compression system as described in any one of the above embodiments, the air compression system is arranged in the casing, and the casing is provided with a circulation inlet and a circulation outlet communicated with the inner cavity of the casing.

[0031] In some embodiments of the present application, a first partition plate is arranged inside the casing, the first partition plate divides the inner cavity of the casing into an air inlet cavity and a heat dissipation circulation cavity which are independent of each other, the casing is provided with an air inlet, the air inlet cavity is communicated with the air inlet, the inlet end of the upstream compression unit is communicated with the air inlet cavity, and the heat dissipation circulation cavity is communicated with the circulation inlet and the circulation outlet.

[0032] In some embodiments of the present application, the number of air inlets is plural, and the inlet end of the upstream compression unit is arranged in a staggered manner with each air inlet.

[0033] In some embodiments of the present application, the air compression device further comprises a circulation fan, and the circulation fan is arranged in the heat dissipation circulation cavity. BRIEF DESCRIPTION OF DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limiting of the application. Moreover, in the drawings, like reference numerals refer to similar components throughout the several views. In the drawings:

[0035] Figure 1 A structural schematic diagram of an air compression system according to an embodiment of the present application is schematically shown.

[0036] Figure 2 A connection diagram of an air compression system according to an embodiment of the application is schematically illustrated;

[0037] Figure 3 A partial structure diagram of an air compression system according to an embodiment of the application is schematically illustrated Figure 1 ;

[0038] Figure 4 A partial structure diagram of an air compression system according to an embodiment of the application is schematically illustrated Figure 2 ;

[0039] Figure 5 A partial structure diagram of an air compression system according to an embodiment of the application is schematically illustrated Figure 3 ;

[0040] Figure 6 A partial structure diagram of an air compression system according to an embodiment of the application is schematically illustrated Figure 4 ;

[0041] Figure 7 A structure diagram of a first intercooler of an air compression system according to an embodiment of the application is schematically illustrated;

[0042] Figure 8 An exploded diagram of a first intercooler of an air compression system according to an embodiment of the application is schematically illustrated;

[0043] Figure 9 A structure diagram of a second intercooler of an air compression system according to an embodiment of the application is schematically illustrated;

[0044] Figure 10 An exploded diagram of a second intercooler of an air compression system according to an embodiment of the application is schematically illustrated;

[0045] Figure 11 A structure diagram of an air compression device according to an embodiment of the application is schematically illustrated Figure 1 ;

[0046] Figure 12 A structure diagram of an air compression device according to an embodiment of the application is schematically illustrated Figure 2 ;

[0047] Figure 13 A perspective view of an air compression device according to an embodiment of the application is schematically illustrated.

[0048] Reference signs are as follows:

[0049] 1000, air compression device;

[0050] 100, air compression system; 200, casing; 201, air inlet; 202, circulation inlet; 203, circulation outlet; 204, first partition; 205, air intake cavity; 206, heat dissipation circulation cavity;

[0051] 1, compressor body; 11, compressor casing; 12, first stage compression unit; 121, first stage suction port; 122, first stage discharge port; 13, second stage compression unit; 131, second stage suction port; 132, second stage discharge port; 14, third stage compression unit; 141, third stage suction port; 142, third stage discharge port; 15, first centrifugal fan; 16, second centrifugal fan;

[0052] 2, first cooling mechanism; 21, first intercooler; 211, first intercooler casing; 2111, first air inlet; 2112, first air outlet; 2113, first liquid inlet; 2114, first liquid outlet; 212, first heat exchanger; 22, first cooling pipeline; 221, first cooling branch pipe; 222, second cooling branch pipe; 23, first liquid inlet pipe; 24, first liquid outlet pipe; 25, cooling liquid inlet; 26, cooling liquid outlet;

[0053] 3, filter;

[0054] 4, second cooling mechanism; 41, second intercooler; 411, second intercooler casing; 412, second air inlet; 413, second air outlet; 414, second heat exchanger; 42, second liquid inlet pipe; 43, second liquid outlet pipe; 44, second liquid inlet; 45, second liquid outlet;

[0055] 5, first connecting pipe;

[0056] 6, second connecting pipe;

[0057] 7, pressure relief assembly; 71, pressure relief pipe; 711, pressure relief port; 72, pressure relief valve;

[0058] 81, cooling tower; 82, water pump;

[0059] 9, user interface;

[0060] X, first direction;

[0061] Y, second direction;

[0062] Z, third direction. DETAILED DESCRIPTION

[0063] Example embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by 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 present disclosure to those skilled in the art.

[0064] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "have" or "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0065] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0066] Spatially relative terms, such as "inner", "outer", "inward", "outward", "lower", "bottom", "top", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0067] As Figures 1 to 10As shown, according to the embodiment of the present application, a compressed air system 100 is provided, which comprises a driving assembly and a plurality of compression units.

[0068] Each compression unit has an air inlet and an air outlet, air enters the compression unit through the air inlet and is discharged from the compression unit through the air outlet, the pressure of the air is gradually increased through step-by-step compression, and the single-stage compression ratio is reduced, so as to avoid sharp increase of temperature and increase of energy consumption caused by excessively high compression ratio.

[0069] The driving assembly drives the plurality of compression units to provide power for the compression units, and the air in the environment is sequentially compressed by the plurality of compression units, at least one cooling mechanism is arranged between the upstream compression unit and the downstream compression unit along the flow direction of the air, the upstream compression unit is used to preliminarily compress the air entering the system to increase the pressure and temperature of the air, the air compressed by the upstream compression unit enters the next stage (i.e. the downstream) for further processing, and the downstream compression unit further compresses the air that has been preliminarily compressed to reach a higher pressure level. When working, the high-temperature air discharged from the air outlet of the upstream compression unit first enters the cooling mechanism for cooling, and then enters the air inlet of the downstream compression unit, the air is cooled after each compression to reduce the temperature of the air, thereby improving the efficiency and safety of the next compression, and the temperature of the cooled air is reduced and the density is increased, which is beneficial to the next compression, thereby improving the compression efficiency of the entire system.

[0070] The compressed air system 100 of the present application can reduce the temperature of the air increased after each compression by arranging a plurality of compression units and a cooling mechanism between adjacent compression units, so that the air returns to a lower temperature before entering the next compression unit 12, not only reducing the sharp increase of the temperature of the air during compression, avoiding problems such as overheating of equipment, damage of parts and decrease of performance of lubricating oil caused by high temperature, but also improving the compression efficiency and reducing the energy consumption. In addition, by reasonably distributing the compression ratios at each stage, the overall performance and stability of the system are further improved.

[0071] In some embodiments of the present application, the at least one cooling mechanism comprises a first cooling mechanism 2, the first cooling mechanism 2 comprises a first intercooler 21 and a first cooling pipeline 22, the first intercooler 21 is provided with a first air inlet 2111 and a first air outlet 2112, the first cooling pipeline 22 comprises a first cooling branch pipe 221 and a second cooling branch pipe 222, two ends of the first cooling branch pipe 221 are respectively communicated with the first air inlet 2111 and the upstream compression unit, and two ends of the second cooling branch pipe 222 are respectively communicated with the first air outlet 2112 and the downstream compression unit.

[0072] As shown in FIG. 1, the compressed air system 100 comprises a driving assembly 1 and a plurality of compression units 2. Figure 1 and Figure 2As shown, the first cooling branch pipe 221 is connected with the air outlet of the upstream compression unit and the first air inlet 2111 of the first intercooler 21, for guiding high-temperature compressed air from the upstream compression unit to the first intercooler 21, and the second cooling branch pipe 222 is connected with the first air outlet 2112 of the first intercooler 21 and the air suction port of the downstream compression unit, for guiding the cooled air from the first intercooler 21 to the downstream compression unit. In operation, the high-temperature air discharged from the upstream compression unit first enters the first intercooler 21 for cooling, and the cooled air flows from the first air outlet 2112 of the first intercooler 21 to the air suction port of the downstream compression unit through the second cooling branch pipe 222, to provide low-temperature air for the next stage of compression. By arranging the first cooling mechanism 2, efficient cooling of the high-temperature air can be achieved, the compression efficiency is improved, the energy consumption is reduced, the service life of the equipment is prolonged, and the stable operation of the system is ensured.

[0073] In some embodiments of the present application, the air compression system 100 comprises a compressor body 1, the compressor body 1 comprising a compressor shell 11 and a first compression unit 12 and a second compression unit 13 arranged at the axial ends of the compressor shell 11, a driving assembly arranged in the compressor shell 11, the first compression unit 12 being provided with a first air suction port 121 and a first air outlet 122, and the second compression unit 13 being provided with a second air suction port 131, the first air suction port 121 being arranged to communicate with the environment, the first air inlet 2111 being arranged to communicate with the first air outlet 122, and the first air outlet 2112 being arranged to communicate with the second air suction port 131.

[0074] As shown in FIG. 1, the air compression system 100 comprises a first cooling mechanism 2 and a second cooling mechanism 3. Figure 1 , Figure 2 and Figure 6As shown, the axial ends of the compressor shell 11 are respectively provided with a first centrifugal fan 15 and a second centrifugal fan 16, the first centrifugal fan 15 comprises a first fan shell 200, the first fan shell 200 is provided with a first suction port 121 and a first exhaust port 122, the second centrifugal fan 16 comprises a second fan shell 200, the second fan shell 200 is provided with a second suction port 131, the two ends of the compressor shell 11 are respectively connected with the first fan shell 200 and the second fan shell 200, the compressor shell 11 is used to accommodate the internal drive assembly, the compressor shell 11 is usually made of high-strength metal material, and has good sealing performance and mechanical strength. The first suction port 121 is used to communicate with the external environment, inhale natural air, and preliminarily compress the inhaled air to increase the pressure of the air, the first exhaust port 122 is communicated with the first air inlet 2111, and is used to discharge the compressed air through the first exhaust port 122 and enter the first intercooler 21 for cooling, the second suction port 131 is communicated with the first exhaust port 2112 of the first intercooler 21, and is used to receive the air cooled by the first intercooler 21, and the second exhaust port 132 is used to discharge the second compressed air. When working, the air in the environment enters the first compression unit 12 through the first suction port 121, the air is preliminarily compressed in the first compression unit 12, the temperature and pressure of the air are increased, the high-temperature air after the first compression enters the first air inlet 2111 through the first exhaust port 122, in the first intercooler 21, the air is cooled, the temperature is reduced, and the density is increased, the cooled air is discharged through the first exhaust port 2112, and the cooled air enters the second compression unit 13 through the second suction port 131, in the second compression unit 13, the air is further compressed, and the pressure is further increased, the high-pressure air after the second compression is discharged through the second exhaust port 132.

[0075] In some embodiments of the application, the first intercooler 21 comprises a first intercooler shell 211 and a first heat exchanger 212, the first intercooler shell 211 is provided with a first air inlet 2111 and a first exhaust port 2112, and at least one first heat exchanger 212 is arranged in the first intercooler shell 211.

[0076] As shown in Figure 7 and Figure 8 , the first intercooler shell 211 is provided with a mounting space, and the first heat exchanger 212 is mounted in the mounting space, and the first heat exchanger 212 can be a finned heat exchanger, a tubular heat exchanger, etc. The high-temperature air discharged by the first compression unit 12 enters the first intercooler 21 through the first air inlet 2111, the high-temperature air exchanges heat through the first heat exchanger 212, and the first heat exchanger 212 transfers the heat in the air to the cooling medium, thereby reducing the temperature of the air.

[0077] In some embodiments of the present application, the first air inlet 2111 and the first air outlet 2112 are arranged on opposite sides of the first intercooler shell 211, and / or the axis of the first air outlet 2112 is perpendicular to the axis of the first air inlet 2111.

[0078] The first air inlet 2111 and the first air outlet 2112 are arranged on opposite sides of the first intercooler shell 211, or the axis of the first air outlet 2112 is perpendicular to the axis of the first air inlet 2111, or the first air inlet 2111 and the first air outlet 2112 are arranged on opposite sides of the first intercooler shell 211 and the axis of the first air outlet 2112 is perpendicular to the axis of the first air inlet 2111. In this embodiment, as shown in Figure 7 and Figure 8 the first air inlet 2111 and the first air outlet 2112 are arranged on opposite sides of the first intercooler shell 211, and the axis of the first air inlet 2111 extends in the first direction X, and the axis of the first air outlet 2112 extends in the second direction Y, and the first direction X is perpendicular to the second direction Y. Through the above arrangement, the flow path of the air in the first intercooler shell 211 can be lengthened, the cooling path is extended, the residence time of the air in the first intercooler 21 is increased, and the cooling efficiency is improved.

[0079] In some embodiments of the present application, the primary air inlet 121 is arranged along the axis direction of the compressor body 1, and / or the primary air outlet 122 is arranged along the tangential direction of the outer wall surface of the compressor body 1.

[0080] The primary air inlet 121 can be arranged along the axis direction of the compressor body 1, or the primary air outlet 122 is arranged along the tangential direction of the outer wall surface of the compressor body 1, or the primary air inlet 121 is arranged along the axis direction of the compressor body 1 and the primary air outlet 122 is arranged along the tangential direction of the outer wall surface of the compressor body 1. In this embodiment, as shown in Figure 3 and Figure 4 the primary air inlet 121 is arranged along the axis direction of the compressor body 1 and the primary air outlet 122 is arranged along the tangential direction of the outer wall surface of the first fan shell 200, by arranging the primary air inlet 121 along the axis direction of the compressor body 1, the air can enter the compressor smoothly along the axis direction, reducing the resistance when the air enters and reducing the vortex generated when the air enters, thereby reducing energy loss; by arranging the primary air outlet 122 along the tangential direction of the outer wall surface of the first fan shell 200, the tangentially arranged primary air outlet 122 can guide the air to flow along the tangential direction, reducing the vortex and resistance generated when the air is discharged from the first fan shell 200, so that the air can be discharged more smoothly, reducing energy loss and improving the overall efficiency of the system.

[0081] In some embodiments of the present application, the axis of the first-stage air outlet 122 is on the same straight line as the axis of the first-stage air inlet 2111. This arrangement allows the air flow to flow straight along the shortest path during transmission from the first-stage air outlet 122 to the first-stage air inlet 2111, thereby minimizing air flow resistance and energy loss, improving the operating efficiency of the compressor, enhancing the stability and reliability of the system, and simplifying the pipeline connection, reducing manufacturing costs and leakage risks, and further optimizing the overall performance of the system.

[0082] In some embodiments of the present application, the upstream end of the first-stage air inlet 121 is provided with a filter 3 for filtering the air entering the first-stage air inlet 121.

[0083] As shown in Figure 2 The filter 3 can be composed of multiple layers of filtering materials, such as fiber filter screens, activated carbon filter layers, or HEPA (High Efficiency Particulate Air) filter cartridges, etc. The filter 3 is provided with an inlet and an outlet. The inlet is in communication with the external environment, and the outlet is in communication with the first-stage air inlet 121. The inlet is used to inhale natural air, and the outlet is used to send filtered clean air into the first-stage air inlet 121. By setting the filter 3, dust, particulate matter, and impurities in the air can be effectively removed, preventing these impurities from entering the compressor interior, reducing wear and damage to compressor components, and prolonging the service life of the compressor. In addition, clean air can be compressed more efficiently, reducing the energy consumption of the compressor and improving the overall efficiency of the system.

[0084] In some embodiments of the present application, the air compression system 100 further comprises a second cooling mechanism 4. The first cooling mechanism 2 is arranged on one side of the compressor body 1 in a direction perpendicular to the axial direction of the compressor body 1, and the second cooling mechanism 4 is arranged on the other side of the compressor body 1. The first cooling mechanism 2 and the second cooling mechanism 4 are respectively in communication with the compressor body 1.

[0085] As shown in Figure 1As shown, by setting the second cooling mechanism 4, the air cooled by the first cooling mechanism 2 can be cooled again, further reducing the air temperature, improving the compression efficiency of the entire air compression system 100, and the density of the cooled low-temperature air is higher, which is easier to be compressed, reducing the power consumption required in the compression process, reducing the energy consumption of the system. In addition, the second cooling mechanism 4 can effectively reduce the risk of system failure caused by high temperature, improve the reliability and stability of the system, and prolong the service life of the equipment. The first cooling mechanism 2 and the second cooling mechanism 4 are respectively arranged on both sides of the compressor body 1 in the direction perpendicular to the axial direction of the compressor body 1, which not only optimizes the space utilization, makes the structure of the entire air compression system 100 more compact, and is convenient for maintenance and repair, but also shortens the conveying distance of the cooling medium, optimizes the cooling path, reduces energy loss, and enables the first cooling mechanism 2 and the second cooling mechanism 4 to more efficiently cool the compressed air, thereby improving the cooling efficiency.

[0086] In some embodiments of the present application, the first cooling mechanism 2 further comprises a first liquid inlet pipe 23 and a first liquid outlet pipe 24, and the first intercooler shell 211 is further provided with a first liquid inlet 2113 and a first liquid outlet 2114. One end of the first liquid inlet pipe 23 is configured as a cooling liquid inlet 25 for communicating with an external cooling liquid, and the other end is in communication with the first liquid inlet 2113. One end of the first liquid outlet pipe 24 is configured as a cooling liquid outlet 26 for communicating with an external cooling liquid, and the other end is in communication with the first liquid outlet 2114.

[0087] As shown in Figure 1 and Figure 2 , the two ends of the first liquid inlet pipe 23 are respectively in communication with the cooling liquid inlet 25 and the first liquid inlet 2113, for introducing external cooling liquid into the first intercooler 21. For example, a cooling tower 81 and a water pump 82 are provided, which can effectively provide cooling liquid for the system and ensure continuous supply of cooling liquid. The two ends of the first liquid outlet pipe 24 are respectively in communication with the cooling liquid outlet 26 and the first liquid outlet 2114, for discharging the cooling liquid after heat exchange from the first intercooler 21 to the external cooling liquid return system to realize recycling of the cooling liquid. Through the circulation of the cooling liquid, the first intercooler 21 can continuously and effectively reduce the temperature of the high-temperature air and improve the cooling efficiency.

[0088] In some embodiments of the present application, the second-stage compression unit 13 further comprises a second-stage gas outlet 132, and the second cooling mechanism 4 is provided with a second gas inlet 412 and a second gas outlet 413. The second gas inlet 412 is in communication with the second-stage gas outlet 132, and the second gas outlet 413 is in communication with the third-stage compression unit 14.

[0089] As shown in Figure 2As shown, the second air outlet 132 is arranged on the second fan casing 200 for discharging the air compressed by the second centrifugal fan 16, and the discharged air enters the second cooling mechanism 4. The second air inlet 412 of the second cooling mechanism 4 is used to receive the high-temperature air compressed by the second centrifugal fan 16 and cool the high-temperature air to reduce the air temperature. The cooled air is discharged through the second air outlet 413 and sent to the third compression unit 14 for final compression to reach the required pressure value. By arranging the multi-stage compression of the first compression unit 12, the second compression unit 13, and the third compression unit 14, the air pressure is gradually increased, the single-stage compression ratio is reduced, and the energy consumption is reduced. At the same time, the air cooled by the second cooling mechanism 4 after the second compression reduces the air temperature and improves the efficiency of the third compression.

[0090] In some embodiments of the present application, the axis of the second air outlet 132 and the axis of the second air inlet 412 are on the same straight line. This arrangement enables the airflow to flow along the shortest path in a straight line during transmission from the second air outlet 132 to the second air inlet 412, thereby minimizing airflow resistance and energy loss, improving the operating efficiency of the compressor, enhancing the stability and reliability of the system, simplifying the pipe connection, reducing the manufacturing cost and leakage risk, and further optimizing the overall performance of the system.

[0091] In some embodiments of the present application, the second cooling mechanism 4 includes a second intercooler 41, which includes a second intercooler casing 411 and a second heat exchanger 414. The second air inlet 412 and the second air outlet 413 are arranged on the second intercooler casing 411, and at least one second heat exchanger 414 is arranged in the first intercooler casing 211.

[0092] As shown in Figure 9 and Figure 10 The second intercooler casing 411 has a mounting space, and the second heat exchanger 414 is mounted in the mounting space. The second heat exchanger 414 can be a finned heat exchanger, a tubular heat exchanger, etc., for realizing heat exchange between the air and the cooling medium (such as cooling water or air). The high-temperature air compressed by the first compression unit 12 enters the second intercooler 41 through the second air inlet 412, and the heat in the high-temperature air is transferred to the cooling medium through the second heat exchanger 414 to reduce the air temperature. The cooled air is discharged through the second air outlet 413 and sent to the third compression unit 14. The second air inlet 412 and the second air outlet 413 are arranged oppositely, which prolongs the cooling path, increases the residence time of the air in the second intercooler 41, and improves the cooling efficiency.

[0093] In some embodiments of the present application, the second cooling mechanism 4 further comprises a second liquid inlet pipe 42 and a second liquid outlet pipe 43, and the second intercooler shell 411 is further provided with a second liquid inlet opening 44 and a second liquid outlet opening 45, the two ends of the second liquid inlet pipe 42 are respectively communicated with the first liquid inlet pipe 23 and the second liquid inlet opening 44, and the two ends of the second liquid outlet pipe 43 are respectively communicated with the first liquid outlet pipe 24 and the second liquid outlet opening 45.

[0094] As shown in Figure 2 , one end of the second liquid inlet pipe 42 is communicated with the first liquid inlet pipe 23, and the other end is communicated with the second liquid inlet opening 44, the second liquid inlet pipe 42 is used to introduce the cooling liquid in the first liquid inlet pipe 23 into the second intercooler 41, to ensure the continuous supply of cooling liquid, one end of the second liquid outlet pipe 43 is communicated with the first liquid outlet pipe 24, and the other end is communicated with the second liquid outlet opening 45, the second liquid outlet pipe 43 is used to discharge the cooling liquid after heat exchange from the second intercooler 41 to the first liquid outlet pipe 24, to realize the recycling of the cooling liquid, through the circulation of the cooling liquid, the second intercooler 41 can continuously and effectively reduce the temperature of the high-temperature air, and improve the cooling efficiency.

[0095] In some embodiments of the present application, the second air inlet opening 412 and the second air outlet opening 413 are oppositely arranged on the two sides of the second intercooler shell 411, and / or the axis of the second air outlet opening 413 is parallel to the axis of the second air inlet opening 412.

[0096] The second air inlet opening 412 and the second air outlet opening 413 are oppositely arranged on the two sides of the second intercooler shell 411, or the axis of the second air outlet opening 413 is parallel to the axis of the second air inlet opening 412, or the second air inlet opening 412 and the second air outlet opening 413 are oppositely arranged on the two sides of the second intercooler shell 411 and the axis of the second air outlet opening 413 is parallel to the axis of the second air inlet opening 412. As shown in Figure 9 and Figure 10 , the second air inlet opening 412 and the second air outlet opening 413 are respectively located on the two sides of the second intercooler shell 411, and the second air outlet opening 413 and the second air inlet opening 412 both extend along the third direction Z. Through the above arrangement, the flow path of the air in the second intercooler shell 411 can be lengthened, the cooling path is prolonged, the residence time of the air in the second intercooler 41 is increased, and the cooling efficiency is improved.

[0097] In some embodiments of the present application, the secondary air inlet opening 131 is arranged along the axis direction of the compressor body 1, and / or the secondary air outlet opening 132 is arranged along the tangential direction of the outer wall surface of the compressor body 1.

[0098] The secondary air inlet 131 can be arranged along the axial direction of the compressor body 1, or the secondary air outlet 132 is arranged along the tangential direction of the outer wall surface of the compressor body 1, or the secondary air inlet 131 is arranged along the axial direction of the compressor body 1 and the secondary air outlet 132 is arranged along the tangential direction of the outer wall surface of the second fan shell 200. In this embodiment, as shown in Figure 5 the secondary air inlet 131 is arranged along the axial direction of the compressor body 1 and the secondary air outlet 132 is arranged along the tangential direction of the outer wall surface of the second fan shell 200, the air can enter the compressor along the axial direction smoothly by arranging the secondary air inlet 131 along the axial direction of the compressor body 1, the resistance of the air when entering is reduced, and the vortex generated when the air enters is reduced, thereby reducing the energy loss; by arranging the secondary air outlet 132 along the tangential direction of the outer wall surface of the second fan shell 200, the secondary air outlet 132 arranged along the tangential direction can guide the air to flow along the tangential direction, reduce the vortex and resistance generated when the air is discharged from the second fan shell 200, so that the air can be discharged more smoothly, the energy loss is reduced, and the overall efficiency of the system is improved.

[0099] In some embodiments of the present application, the tertiary compression unit 14 is provided with a tertiary air inlet 141 and a tertiary air outlet 142, the tertiary air inlet 141 is communicated with the second air outlet 413, and the tertiary air outlet 142 is used to communicate with the user end.

[0100] As shown in Figure 5 , the tertiary air inlet 141 and the tertiary air outlet 142 are arranged on the second fan shell 200, and the tertiary air inlet 141 and the tertiary air outlet 142 extend along the axial direction perpendicular to the compressor body 1, which optimizes the space utilization and makes the whole system more compact, and at the same time, reduces the resistance and vortex of the air when entering and discharging, thereby improving the compression efficiency and reducing the energy consumption, the tertiary air inlet 141 is communicated with the second air outlet 413 for receiving the air cooled by the second cooling mechanism 4, and the tertiary air outlet 142 is used to communicate with the user end for discharging the high-pressure air compressed by the tertiary compression unit 14 for use by the user end. When working, the air cooled by the second cooling mechanism 4 is discharged through the second air outlet 413 and enters the tertiary air inlet 141, and in the tertiary compression unit 14, the air is further compressed to a higher pressure, and the high-pressure air compressed by the tertiary compression unit 14 is discharged through the tertiary air outlet 142 and enters the user end.

[0101] In some embodiments of the present application, the air compression system 100 further comprises a first connecting pipe 5, the tertiary air inlet 141 is communicated with the second air outlet 413 through the first connecting pipe 5, and the first connecting pipe 5 is an arc-shaped pipe.

[0102] As shown in Figure 1 and Figure 2As shown, one end of the first connecting pipe 5 is in communication with the second air outlet 413, and the other end is in communication with the third air inlet 141. The first connecting pipe 5 comprises a first pipe section, a second pipe section, and a transition pipe connected between the first pipe section and the second pipe section. The axis of the first pipe section is perpendicular to the axis of the second pipe section. The transition pipe is an arc-shaped pipe. The arc-shaped structure can smoothly divert the fluid from the first pipe section to the second pipe section, avoiding fluid impact and turbulence caused by a right-angle connection. The design of the arc-shaped pipe can effectively reduce the turbulence intensity of the fluid at the turning point, making the fluid flow more stable, dispersing the impact force of the fluid on the wall of the first connecting pipe 5, prolonging the service life of the first connecting pipe 5, and reducing the maintenance cost of the equipment.

[0103] In some embodiments of the present application, along the axial direction of the compressor body 1, the third air inlet 141 is closer to the second compression unit 13 than to the first compression unit 12. The closer the third air inlet 141 to the second compression unit 13 than to the first compression unit 12, the shorter the transmission distance of the cooled air before entering the third compression unit 14, which reduces the air flow resistance and vortex, thereby reducing energy loss and improving the overall efficiency of the system. At the same time, this layout reduces the temperature rise of the air during transmission, further enhancing the cooling effect and ensuring that the air entering the third compression unit 14 has a lower temperature, which is beneficial to improving the compression efficiency. In addition, this compact layout also optimizes the use of space, making the entire system more compact and facilitating maintenance and repair.

[0104] In some embodiments of the present application, the air compression system 100 further comprises a second connecting pipe 6, and the third air outlet 142 is in communication with the user end through the second connecting pipe 6. The second connecting pipe 6 is provided with a pressure relief assembly 7.

[0105] As shown in Figure 1 and Figure 2 , one end of the second connecting pipe 6 is connected to the third air outlet 142, and the other end is connected to the user end. The second connecting pipe 6 is used to transport high-pressure air discharged by the third compression unit 14 to the user end. By providing the pressure relief assembly 7 on the second connecting pipe 6, the system can be stably operated within a safe pressure range, thereby reducing the risk of equipment damage caused by overpressure and improving the reliability and service life of the system.

[0106] In some embodiments of the present application, the pressure relief assembly 7 comprises a pressure relief pipe 71 and a pressure relief valve 72 provided on the pressure relief pipe 71. One end of the pressure relief pipe 71 is in communication with the second connecting pipe 6, and the pressure relief pipe 71 extends upward from the second connecting pipe 6. The end of the pressure relief pipe 71 away from the second connecting pipe 6 is provided with a pressure relief port 711.

[0107] As shown in Figure 1 and Figure 2As shown, one end of the pressure relief pipe 71 is communicated with the second connecting pipe 6, and the other end is provided with a pressure relief port 711. The pressure relief pipe 71 extends upward from the second connecting pipe 6 and is arranged vertically or approximately vertically. The upwardly extending pressure relief pipe 71 can more effectively guide the gas discharge, make the gas more smoothly discharge from the system, reduce the influence on the pressure in the system during gas discharge, and improve the stability of the system. The pressure relief valve 72 is installed on the pressure relief pipe 71 and is used to control the pressure relief process. The pressure relief valve 72 can be a spring type, lever type or pulse type pressure relief valve 72. The pressure relief valve 72 includes a valve body, a valve core, a spring and other components. The valve body is provided with an air inlet and an air outlet inside. The valve core is kept in a closed state under the action of the spring. When the pressure in the pipeline exceeds the set value, the valve core is automatically opened to release the excess pressure. When the pressure in the system is within the normal range, the valve core of the pressure relief valve 72 is kept in a closed state under the action of the spring. The high-pressure air is smoothly delivered to the user end through the second connecting pipe 6. When the pressure in the system exceeds the set threshold value, the pressure on the valve core is greater than the spring force, the valve core is automatically opened, the high-pressure air is released from the pressure relief port 711 of the pressure relief pipe 71 to a safe area, thereby reducing the pressure in the system, so that the system operates within the normal pressure range, and the reliability and stability of the system are improved.

[0108] The second aspect of the present application provides an air compression device 1000, as shown in the figure. Figures 11 to 13 As shown, the air compression device 1000 includes a shell 200 and the above-mentioned air compression system 100. The air compression system 100 is arranged in the shell 200. The shell 200 is provided with a circulation inlet 202 and a circulation outlet 203 which are communicated with the inner cavity of the shell 200. The circulation inlet 202 is used to introduce external cooling air to provide cooling for the air compression system 100 in the shell 200. The circulation outlet 203 is used to discharge hot air after heat exchange to ensure the recycling of cooling air. By arranging the circulation inlet 202 and the circulation outlet 203, the cooling air continuously enters the inner cavity of the shell 200, is discharged after absorbing heat, and forms a continuous cooling cycle, so that the air compression system 100 can be continuously and effectively cooled during operation. The circulation inlet 202 and the circulation outlet 203 are usually a plurality of small holes or a grid structure to increase the air flow area and reduce the resistance when the air enters.

[0109] In some embodiments of the present application, the shell 200 is internally provided with a first partition plate 204. The first partition plate 204 divides the inner cavity of the shell 200 into an air inlet cavity 205 and a heat dissipation circulation cavity 206 which are independent of each other. The shell 200 is provided with an air inlet 201. The air inlet cavity 205 is communicated with the air inlet 201. The inlet end of the upstream compression unit is communicated with the air inlet cavity 205. The heat dissipation circulation cavity 206 is communicated with the circulation inlet 202 and the circulation outlet 203.

[0110] As shown in the figure, Figure 13As shown, the first partition plate 204 is vertically arranged in the interior of the casing 200, and divides the inner cavity of the casing 200 into two independent air inlet cavity 205 and heat dissipation circulation cavity 206, so as to separate the air inlet cavity 205 and the heat dissipation circulation cavity 206, and make the air flow in the two cavities not interfere with each other. The air inlet cavity 205 is in communication with the external environment through the air inlet 201, and is used for introducing external air to provide air inlet for the compression unit, and the inlet end of the upstream compression unit is in communication with the air inlet cavity 205. The heat dissipation circulation cavity 206 introduces cooling air through the circulation inlet 202 to provide heat dissipation for the air compression system 100 in the casing 200, and discharges hot air through the circulation outlet 203. By arranging the first partition plate 204 in the interior of the casing 200, the inner cavity of the casing 200 is divided into the air inlet cavity 205 and the heat dissipation circulation cavity 206, which are independent of each other, so that the cooling air can circulate in the independent heat dissipation circulation cavity 206, and the cooling air is prevented from mixing with the air in the air inlet cavity 205, thereby improving the cooling efficiency.

[0111] In some embodiments of the present application, the number of air inlets 201 is multiple, and the inlet end of the upstream compression unit is arranged in a staggered manner with each air inlet 201. By arranging the multiple air inlets 201 in a staggered manner, the local pressure is prevented from being too high or the air flow speed is prevented from being too fast due to the concentration of air inlet, so that the air can be more uniformly distributed in the air inlet cavity 205, thereby making the air more uniformly distributed when entering the compressor or the engine, and improving the uniformity of the air inlet.

[0112] In some embodiments of the present application, the air compression device 1000 further comprises a circulation fan, and the circulation fan is arranged in the heat dissipation circulation cavity 206. By arranging the circulation fan in the heat dissipation circulation cavity 206, the circulation fan can accelerate the air flow in the heat dissipation circulation cavity 206, improve the heat dissipation efficiency and effect, and improve the reliability and adaptability of the air compression device 1000.

[0113] The air compression device 1000 works as follows: first, external air enters the air inlet cavity 205 in the casing 200 through the air inlets 201. Because the air inlets 201 are misaligned with the inlet ends of the upstream compression units, the air is more evenly distributed in the air inlet cavity 205, improving the uniformity of the air intake. The air evenly distributed in the air inlet cavity 205 is drawn into the primary compression unit 12 for preliminary compression. The high-temperature air compressed by the primary compression unit 12 enters the first intercooler 21 for cooling. The air cooled by the first intercooler 21 enters the secondary compression unit 13 for further compression. The high-temperature air compressed by the secondary compression unit 13 enters the second intercooler 41 for cooling. The air cooled by the second intercooler 41 enters the tertiary compression unit 14 for final compression. The high-pressure air compressed by the tertiary compression unit 14 and cooled by the third air outlet 142 is discharged to the user end for use by the user. During the operation of the air compression device 1000, external cooling air enters the heat dissipation circulation cavity 206 through the circulation inlet 202, exchanges heat with the air compression system 100 in the casing 200, absorbs the heat generated by the system, and the hot air after absorbing the heat is discharged from the casing 200 through the circulation outlet 203, completing the heat dissipation circulation.

[0114] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An air compression system, characterized in that: include: A plurality of compression units, each of the compression units having an air intake and an air outlet, wherein air enters the compression unit through the air intake and is pressurized, and is discharged from the compression unit through the air outlet; A driving component drives the plurality of compression units, and the ambient air is pressurized by passing through the plurality of compression units in sequence. Along the flow direction of the air, at least one cooling mechanism is provided between the upstream compression unit and the downstream compression unit.

2. The air compression system according to claim 1, characterized in that: The at least one cooling mechanism includes a first cooling mechanism, the first cooling mechanism includes a first intercooler and a first cooling pipeline, the first intercooler is provided with a first air inlet and a first air outlet, the first cooling pipeline includes a first cooling branch and a second cooling branch, the two ends of the first cooling branch are respectively connected to the first air inlet and the upstream compression unit, and the two ends of the second cooling branch are respectively connected to the first air outlet and the downstream compression unit.

3. The air compression system according to claim 2, characterized in that: The air compression system includes a compressor body, which includes a compressor shell and a first-stage compression unit and a second-stage compression unit arranged at both axial ends of the compressor shell. The drive assembly is arranged in the compressor shell. The first-stage compression unit is provided with a first-stage air intake and a first-stage air outlet. The second-stage compression unit is provided with a second-stage air intake. The first-stage air intake is used to communicate with the environment. The first air inlet is connected to the first-stage air outlet, and the first air outlet is connected to the second-stage air intake.

4. The air compression system according to claim 3, characterized in that: The first intercooler includes a first intercooler housing and a first heat exchanger. The first intercooler housing is provided with the first air inlet and the first air outlet. At least one first heat exchanger is provided in the first intercooler housing.

5. The air compression system according to claim 4, characterized in that: The first air inlet and the first air outlet are arranged oppositely on two sides of the first intercooler housing, and / or the axis of the first air outlet is perpendicular to the axis of the first air inlet.

6. The air compression system according to claim 3, characterized in that: The first-stage air intake is arranged along the axial direction of the compressor body, and / or the first-stage air outlet is arranged along the tangential direction of the outer wall surface of the compressor body.

7. The air compression system according to claim 3, characterized in that: The axis of the first-stage air outlet and the axis of the first air inlet are located on the same straight line.

8. The air compression system according to claim 3, characterized in that: A filter is provided at the upstream end of the first-level air intake port, and the filter is used to filter the gas entering the first-level air intake port.

9. The air compression system according to claim 4, characterized in that: The air compression system also includes a second cooling mechanism. Along a direction perpendicular to the axial direction of the compressor body, the first cooling mechanism is arranged on one side of the compressor body, and the second cooling mechanism is arranged on the other side of the compressor body. The first cooling mechanism and the second cooling mechanism are respectively connected to the compressor body.

10. The air compression system according to claim 4, characterized in that: The first cooling mechanism also includes a first liquid inlet pipe and a first liquid outlet pipe. The first intercooler housing is also provided with a first liquid inlet and a first liquid outlet. One end of the first liquid inlet pipe is configured as a coolant inlet for communicating with an external coolant, and the other end is communicated with the first liquid inlet. One end of the first liquid outlet pipe is configured as a coolant outlet for communicating with the external coolant, and the other end is communicated with the first liquid outlet.

11. The air compression system according to claim 10, characterized in that: The air compression system also includes a three-stage compression unit, the two-stage compression unit also includes a two-stage air outlet, the second cooling mechanism is provided with a second air inlet and a second air outlet, the second air inlet is connected to the two-stage air outlet, and the second air outlet is connected to the three-stage compression unit.

12. The air compression system according to claim 11, characterized in that: The axis of the secondary air outlet and the axis of the second air inlet are located on the same straight line.

13. The air compression system according to claim 11, characterized in that: The second cooling mechanism includes a second intercooler, which includes a second intercooler shell and a second heat exchanger. The second intercooler shell is provided with the second air inlet and the second air outlet, and at least one second heat exchanger is provided in the first intercooler shell.

14. The air compression system according to claim 13, characterized in that: The second cooling mechanism also includes a second liquid inlet pipe and a second liquid outlet pipe, and the second intercooler shell is also provided with a second liquid inlet and a second liquid outlet. The two ends of the second liquid inlet pipe are respectively connected to the first liquid inlet pipe and the second liquid inlet, and the two ends of the second liquid outlet pipe are respectively connected to the first liquid outlet pipe and the second liquid outlet.

15. The air compression system according to claim 13, characterized in that: The second air inlet and the second air outlet are arranged opposite to each other on two sides of the second intercooler housing, and / or the axis of the second air outlet is parallel to the axis of the second air inlet.

16. The air compression system according to claim 11, characterized in that: The secondary air intake port is arranged along the axial direction of the compressor body, and / or the secondary air outlet port is arranged along the tangential direction of the outer wall surface of the compressor body.

17. The air compression system according to claim 11, characterized in that: The three-stage compression unit is provided with a three-stage air intake and a three-stage air outlet. The three-stage air intake is communicated with the second air outlet, and the three-stage air outlet is used to communicate with the user-end interface.

18. The air compression system according to claim 17, characterized in that: The air compression system further includes a first connecting pipe, through which the third-stage air intake port is connected to the second air outlet port, and the first connecting pipe is an arc-shaped pipe.

19. The air compression system according to claim 17, characterized in that: Along the axial direction of the compressor body, the third-stage intake port is closer to the second-stage compression unit than the first-stage compression unit.

20. The air compression system according to claim 17, characterized in that: The air compression system further includes a second connecting pipe, through which the third-level air outlet is communicated with the user-end interface, and a pressure relief assembly is provided on the second connecting pipe.

21. The air compression system according to claim 20, characterized in that: The pressure relief assembly includes a pressure relief pipe and a pressure relief valve arranged on the pressure relief pipe. One end of the pressure relief pipe is connected to the second connecting pipe. The pressure relief pipe extends upward from the second connecting pipe. The end of the pressure relief pipe away from the second connecting pipe is provided with a pressure relief port.

22. An air compressor, characterized in that: It comprises a casing and an air compression system as described in any one of claims 1 to 21, wherein the air compression system is arranged in the casing, and the casing is provided with a circulation inlet and a circulation outlet connected to the inner cavity of the casing.

23. The air compression equipment according to claim 22, characterized in that: A first partition is provided inside the casing, which divides the inner cavity of the casing into an air intake cavity and a heat dissipation circulation cavity which are independent of each other. An air inlet is provided on the casing, the air intake cavity is connected to the air inlet, the inlet end of the upstream compression unit is connected to the air intake cavity, and the heat dissipation circulation cavity is connected to the circulation inlet and the circulation outlet.

24. The air compression equipment according to claim 23, characterized in that: There are multiple air inlets, and the inlet end of the upstream compression unit is staggered with each of the air inlets.

25. The air compression equipment according to claim 23 or 24, characterized in that: The air compression equipment further includes a circulation fan, which is arranged in the heat dissipation circulation cavity.

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