Air intake device for an air compressor and air compressor

Abstract

Embodiments of the present application relate to an air intake device for an air compressor and an air compressor. The air intake device comprises: an air intake device body having an air intake side, an air outlet side, a top plate and a bottom plate, the bottom plate being configured to extend upwardly relative to the horizontal plane from the air intake side to the air outlet side, such that an upper surface of the bottom plate forms a dust discharge ramp; a plurality of dust removal baffles arranged inside the air intake device body, the plurality of dust removal baffles being configured to separate at least part of dust in the gas by multiple impacts with the gas from the air intake side; and at least one filter element arranged inside the air intake device body downstream of the airflow direction of the plurality of dust removal baffles for further filtering the gas. The air intake device can efficiently operate in a high-dust environment (such as a desert area), improve the service life of the filter element, and improve work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air compressors, and more particularly, to an air intake device for an air compressor and an air compressor. BACKGROUND

[0002] An air compressor, also known as an air compressor, is a device that converts the mechanical energy of an electric motor or a diesel engine into gas pressure energy, and achieves the purpose of improving gas pressure or conveying gas by compressing gas.

[0003] At present, most air compressor air intake devices only filter impurities in gas by setting air filters or filter cotton, and a small part of air compressors set centrifugal pre-filter air intake channels at the front end of the air filter. However, in areas with a lot of dust in the air, such as desert areas, the existing air compressor air intake device usually cannot achieve efficient impurity filtration, and the filtered impurities are easy to accumulate in the air intake device, causing the air intake device to be blocked or the gas filtration efficiency to be low, which shortens the service life of the air filter and requires frequent replacement, which undoubtedly increases the use cost, and also reduces the working efficiency of the air compressor. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above problems, the present application provides an air intake device for an air compressor and an air compressor. The air intake device and the air compressor provided by the present application can separate at least part of the dust before the air enters the filter element for filtration, and can efficiently discharge the dust, so that it can efficiently operate in a high-dust environment (such as a desert area), prolong the service life of the filter element, and improve the working efficiency.

[0005] In the first aspect of the present application, an air intake device for an air compressor is provided. The air intake device comprises: an air intake device body having an air intake side, an air outlet side, a top plate and a bottom plate, the bottom plate being configured to extend upwardly relative to the horizontal plane from the air intake side to the air outlet side, so that the upper surface of the bottom plate forms a dust discharge ramp; a plurality of dust removal baffles are arranged in the interior of the air intake device body, the plurality of dust removal baffles being configured to separate at least part of the dust in the gas from the air intake side by multiple impacts of the gas, and at least one filter element is arranged in the air intake device body downstream of the airflow direction of the plurality of dust removal baffles for further filtering the gas.

[0006] In the second aspect of the present application, an air compressor is provided. The air compressor comprises a compressor main machine and the air intake device involved in the first aspect connected to the compressor main machine.

[0007] The air intake device for an air compressor and the air compressor provided by the application have the following beneficial effects compared with the prior art:

[0008] (1) By arranging a plurality of dust removal baffles near the air inlet side inside the air intake device body, part of the dust is separated from the air through the impact of the dust removal baffles and the dusty air, so that the dust in the air entering the filter core for filtering is as little as possible;

[0009] (2) By arranging the plurality of dust removal baffles in the axial direction of the air intake device body in sequence and staggered in the vertical direction, an "S"-shaped air flow channel is formed between the plurality of dust removal baffles, and the dust separation efficiency is further improved;

[0010] (3) By extending the bottom plate of the air intake device body upwardly and obliquely relative to the horizontal plane from the air inlet side to the air outlet side, the upper surface of the bottom plate forms a dust removal ramp, and a plurality of notches are arranged at the bottom of part of the baffles, so as to facilitate the discharge of the dust separated by the plurality of dust removal baffles; and

[0011] (4) By arranging at least one inclined baffle inside the air outlet pipe, when the oil-carrying gas is returned from the compressor main machine, the oil-carrying gas collides with the at least one inclined baffle, and at least part of the oil droplets in the oil-carrying gas are separated out and returned to the compressor main machine. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description only illustrate some embodiments described in the present application. Where appropriate, the same reference numbers will be used in all the drawings to refer to the same or similar parts. Such embodiments are exemplary rather than intended to be exhaustive or exclusive. In the drawings:

[0013] Figure 1 Structure diagram of the air intake device for an air compressor according to the embodiment of the present disclosure;

[0014] Figure 2 Side view of the air intake device according to the embodiment of the present disclosure, in which one side plate is removed;

[0015] Figure 3 Structure diagram of the air intake device according to the embodiment of the present disclosure, in which the top plate and one side plate are removed;

[0016] Figure 4 Top view of the air intake device according to the embodiment of the present disclosure, in which the top plate is removed;

[0017] Figure 5A structural schematic view of an air inlet device according to an embodiment of the present disclosure, wherein the top plate and one of the side plates are removed;

[0018] Figure 6 A structural schematic view of an air inlet device main body according to an embodiment of the present disclosure, wherein the top plate and the other side plate are removed;

[0019] Figure 7 A structural schematic view of an air inlet device according to an embodiment of the present disclosure, wherein the top plate is removed;

[0020] Figure 8 A structural schematic view of an air outlet tube according to an embodiment of the present disclosure.

[0021] Reference signs:

[0022] 100-air inlet device; 110-air device main body; 111-air inlet side; 111A-air inlet plate; 111B-pre-filter cotton grid; 111C-pre-filter cotton; 112-air outlet side; 113-top plate; 114-bottom plate; 114A-dust discharge ramp; 140B'-notch; 114B-dust discharge port; 115-side plate; 120-filter element; 130-air outlet tube; 131-first inclined baffle; 132-second inclined baffle; 140A-first baffle; 140B-second baffle; 140C-third baffle; 150-dust discharge valve; 160-filter element accommodating cavity; 161-filter element support beam; 162-filter element support frame; 163-filter element limiting member; 164-double-end screw rod; 165-filter element fixing beam; 166-wing nut; 167-flap; 170-fourth baffle; 180-filter element baffle; 180A-first plate member; 180B-second plate member; 181-filter element air outlet hole;

[0023] 200-baffle; 210-air channel; 220-inclined air outlet side plate; 221-air outlet port; 230-oil collecting groove; 240-fifth baffle; 250-sixth baffle; 260-dump port; 270-filter element door; 271-hinge; 272-door lock DETAILED DESCRIPTION

[0024] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without any creative effort fall within the scope of protection of the present application.

[0025] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the ordinary meanings as understood by one of ordinary skill in the art to which this application pertains. The words "first", "second", and similar words of distinction do not by themselves indicate any order, quantity, or importance, but are used to distinguish one element from another. The words "comprise", "comprises", and "comprising", or the like, mean that the elements listed after these words encompass the elements recited and equivalents thereof, and do not exclude other elements. The words "connected" or "coupled" or the like, do not by themselves indicate a physical or mechanical connection or coupling, but can include an electrical connection or coupling, whether direct or indirect. The words "upper", "lower", "left", "right", and the like, are used only to indicate relative positions, and can change when the absolute positions of the described objects change.

[0026] In order to keep the following description of the embodiments of the present application clear and brief, detailed descriptions of known functions and known components will be omitted.

[0027] Figure 1 A structural schematic diagram of an air intake device for an air compressor is shown. Figure 2 A side perspective view of the air intake device is shown, which shows the internal structure of the air intake device from the side. As shown in Figure 1 and Figure 2 The air intake device 100 includes an air intake device body 110, at least one filter element 120 arranged inside the air intake device body 110, and an air outlet pipe 130 connected to the air intake device body 110, wherein the air intake device body 110 is surrounded by an air intake side 111, an air outlet side 112, a top plate 113, a bottom plate 114, and two opposite side plates 115, one end of the air outlet pipe 130 is connected to the air outlet side 112 of the air intake device body 110, and the other end can be connected to a compressor main machine (not shown in the figure) of an air compressor. Air in the environment can enter the air intake device 100 from the air intake side 111 and be filtered by the at least one filter element 120 inside (along the path shown by the dashed line in Figure 2 ), so as to separate dust in the air, and the separated air can be discharged from the air outlet side 112 and introduced into the compressor main machine of the air compressor via the air outlet pipe 130 for compression.

[0028] Figure 3 Further shown is the internal structure of the air intake device body 110 after the top plate 113 and one of the side plates 115 are removed. As shown in Figure 2 and Figure 3As shown, multiple dust removal baffles are spaced apart inside the main body 110 of the air intake device near the air intake side 111. At least one filter element 120 is arranged downstream of the multiple dust removal baffles in the airflow direction. The multiple dust removal baffles are arranged sequentially in the axial direction of the main body 110 of the air intake device and staggered in the vertical direction, thereby forming an "S" shaped airflow channel between the multiple dust removal baffles.

[0029] For example, such as Figure 2 As shown, the plurality of dust removal baffles may include a first baffle 140A, a second baffle 140B, and a third baffle 140C arranged sequentially in the axial direction of the air intake device body 110, wherein the first baffle 140A is closest to the air intake side 111, and the third baffle 140C is furthest from the air intake side 111. At least one filter element 120 is arranged downstream of the third baffle 140C in the airflow direction. The first baffle 140A and the third baffle 140C are disposed on the top plate 113 of the air intake device body 110, and their bottoms have a certain gap with the bottom plate 114; the second baffle 140B is disposed on the bottom plate 114 of the air intake device body 110, and its top has a certain gap with the top plate 113. It should be understood that the above gaps may be the same or different, and are not limited herein.

[0030] In addition, at least one filter element 120 is provided downstream of the multiple dust baffles. Figure 2 In the embodiment shown, the gas separated by multiple dust removal baffles enters from below the third baffle 140C into the filter element receiving cavity 160, which contains at least one filter element 120, for further filtration.

[0031] When the air compressor is operating, dusty air enters the interior of the intake device body 110 from the intake side 111. When the airflow impacts the first baffle 140A, it passes through the lower gap of the first baffle 140A, then is impacted by the second baffle 140B and passes through the upper gap of the second baffle 140B. Next, it is impacted by the third baffle 140C and flows into at least one filter element 120 for filtration through the lower gap of the third baffle 140C. In this way, an "S"-shaped airflow channel is formed between the three baffles. Through the impact of the air with these three baffles, some dust is separated from the air.

[0032] In the above embodiment, the case of three baffle plates is exemplified, and here, the number of dust removal baffle plates should not be limited, as long as the number is two or more and it can form an "S" shaped air flow channel. For example, depending on the separation efficiency and cost control, only two dust removal baffle plates, i.e. the first baffle plate 140A and the second baffle plate 140B, can be arranged, or four or more dust removal baffle plates can be arranged. In order to facilitate the understanding of the present disclosure, the following will continue to describe the embodiments of the present disclosure with three dust removal baffle plates, i.e. the first baffle plate 140A, the second baffle plate 140B and the third baffle plate 140C.

[0033] As Figure 2 Best shown, the bottom plate 114 of the air inlet device body 110 extends upwardly inclinedly relative to the horizontal plane from the air inlet side 111 to the air outlet side 112, so as to form a dust removal ramp 114A on the upper surface of the bottom plate 114, i.e. the surface inside the air inlet device body 110. In addition, a plurality of notches 140B' are formed on the bottom plate 114 at the position where the bottom of the second baffle plate 140B is connected, and at least one dust removal port 114B is formed on the bottom plate 114 at the position close to the air inlet side 111. Through this configuration, the dust separated by the dust removal baffle plates can slide downwardly inclinedly along the dust removal ramp 114A, and be guided to pass through the plurality of notches 140B' (the first baffle plate 140A and the third baffle plate 140C have a certain gap with the bottom plate 114, and the separated dust can pass through these two dust removal baffle plates freely), and then be discharged from the at least one dust removal port 114B. Figure 3 In one embodiment, a dust removal valve 150 is arranged on the lower surface of the bottom plate 114, i.e. the surface facing the external environment, which is arranged corresponding to the at least one dust removal port 114B and is configured to be able to open or close the at least one dust removal port 114B. Here, the air inlet device body 110 can include a single dust removal valve 150 for uniformly opening or closing the at least one dust removal port 114B, or a plurality of dust removal valves 150 corresponding to each of the plurality of dust removal ports 114B for independently opening or closing each dust removal port 114B.

[0034] In a preferred embodiment, a pre-filter cotton is installed at the air inlet side 111 of the air inlet device body 110. Specifically, as

[0035] Figure 2 ​As shown, an air inlet plate 111A is fixedly installed at the air inlet side 111, and a pre-filtering cotton grid 111B is formed on the air inlet plate 111A. A pre-filtering cotton 111C is detachably arranged on the pre-filtering cotton grid 111B, forming the first "barrier" for the air in the environment to enter the air inlet device 100. Dusty air in the environment enters the air inlet device main body 110 from the air inlet side 111, and is preliminarily filtered by the pre-filtering cotton 111C, thereby reducing the amount of dust separated by the plurality of dust separation baffles and filtered by the at least one filter element 120, further improving the separation efficiency.

[0036] Further, as shown, Figures 3-7 The fourth baffle 170 and the filter element baffle 180 are further arranged inside the air inlet device main body 110, wherein the filter element baffle 180, the fourth baffle 170, the third baffle 140C and the top plate 113 constitute the filter element accommodating cavity 160. The fourth baffle 170 is connected to the top plate 113 and the bottom plate 114 and is parallel to the third baffle 140C in the axial direction of the main body. The filter element baffle 180 includes a first plate member 180A and a second plate member 180B perpendicular to each other, wherein the first plate member 180A is connected to the third baffle 140C and the fourth baffle 170 and is provided with filter element air outlet holes 181 for accommodating and supporting the air outlet end of the filter element 120, the number of which corresponds to the number of filter elements 120. It should be understood that the second plate member 180B of the filter element baffle 180 is connected to the side plate 115 at the lower portion, so that the side plate 115, the first plate member 180A, the second plate member 180B and the top plate 113 define an air passage 210 for the filtered air to flow downstream.

[0037] As shown, Figure 3 and Figure 4 The air inlet device main body 110 is further provided with a flow blocking plate 200, which is fixedly installed on the side plate 115 and aligned with the third baffle 140C, for blocking the reverse flow of filtered air along the air passage 210 to the dust separation baffles, causing air flow turbulence, and for blocking the flow of dusty air into the air passage 210 during the flow of dusty air between the plurality of dust separation baffles, thereby reducing the separation efficiency.

[0038] Alternatively, in one embodiment, the flow blocking plate 200 can be integrally manufactured with the third baffle 140C arranged along the axial direction of the main body (i.e. as a part of the third baffle 140C).

[0039] Alternatively, in another embodiment, the flow blocking plate 200 is integrally manufactured with the filter element baffle 180 arranged perpendicular to the axial direction of the main body (i.e. as a component of the filter element baffle 180, the first plate member 180A, the second plate member 180B and the flow blocking plate 200 are perpendicular to each other), so that the filter element baffle 180 is in the shape of "L" in the top view. Figure 4 Best shown).

[0040] In a preferred embodiment, as shown in Figure 2 , the second plate member 180B is configured to extend downwardly and gradually from the third baffle plate 140C to the fourth baffle plate 170. With this configuration, it is beneficial to guide the oil that can be sprayed back to the drain port 260 (described below).

[0041] In Figure 3 , Figure 5 and Figure 6 , a filter support beam 161 is arranged inside the filter cartridge receiving cavity 160 and fixedly connected between the third baffle plate 140C and the fourth baffle plate 170 along the axial direction of the main body, and a filter support bracket 162 corresponding to the number of filter cartridges 120 is fixedly arranged on the filter support beam 161 for supporting the air inlet end of at least one filter cartridge 120.

[0042] For example, the filter support bracket 162 can be in the shape of a "V" so as to stably support the filter cartridge 120.

[0043] In an embodiment, the filter support beam 161 and the filter support bracket 162 can be designed to have a height such that the filter cartridge 120 is horizontally received inside the filter cartridge receiving cavity 160 without tilting, ensuring the installation stability of the filter cartridge 120.

[0044] Further, as shown in Figure 3 , on the inner surface of the filter cartridge baffle plate 180 inside the filter cartridge receiving cavity 160, a filter cartridge limiting member 163 is arranged around each filter cartridge air outlet hole 181 so as to limit the filter cartridge 120 in place, further improving the installation stability of the filter cartridge 120. The filter cartridge limiting member 163 should be arranged at least on the left and right sides and the lower side of the filter cartridge air outlet hole 181.

[0045] Further, as shown in Figure 5 and Figure 6 , the filter cartridge receiving cavity 160 can further include a stud bolt 164 and a filter cartridge fixing cross beam 165, wherein the filter cartridge fixing cross beam 165 is arranged on the outer surface of the filter cartridge baffle plate 180 outside the filter cartridge receiving cavity 160 across each filter cartridge air outlet hole 181, and the stud bolt 164 is used to pass through the corresponding filter cartridge 120 along the axial direction of the filter cartridge 120, one end of which is fixed to the air inlet end of the filter cartridge 120 through a wing nut 166 (as shown in Figure 5 ), and the other end is fixed to the filter cartridge fixing cross beam 165 through a baffle 167 and a welded nut. Through the cooperation of the stud bolt 164 and the filter cartridge fixing cross beam 165, the stability of the filter cartridge 120 inside the filter cartridge receiving cavity 160 is further improved.

[0046] In another embodiment, as shown in Figure 1 , the filter cartridge baffle plate 180 can be arranged on the filter support beam 161.As shown, the filter core opening (not shown) and the filter core door 270 for opening and closing the filter core opening are arranged on one of the side plates 115 of the air intake device body 110. The filter core door 270 is fixed on the side plate 115 by a hinge 271 and locked by a door lock 272. Through this configuration, the replacement of at least one filter core 120 in the filter core accommodating cavity 160 can be facilitated, and the work efficiency is improved.

[0047] In one embodiment, as shown in Figure 2 and Figure 4 As shown, the inclined air outlet side plate 220 is installed at the air outlet side 112 of the air intake device body 110. The air outlet 221 is opened on the inclined air outlet side plate 220. One end of the air outlet pipe 130 is fixedly connected to the air outlet 221 and communicates with the air outlet 221. The other end is used to connect to the air inlet of the compressor main machine. Figure 2 In the embodiment shown, the fourth baffle plate 170 is fixedly arranged at the connection between the inclined bottom plate 114 and the inclined air outlet side plate 220, so that the fourth baffle plate 170 and the inclined air outlet side plate 220 form an oil collecting groove 230 with a certain angle inside the air intake device body 110. The air outlet pipe 130 communicates with the oil collecting groove 230 via the air outlet 221. In addition, the oil collecting groove 230 communicates with the gas flow channel 210 after gas filtration described above, so that the gas filtered by at least one filter core 120 can enter the oil collecting groove 230 via the gas channel 210, and then enter the air outlet pipe 120 via the air outlet 221.

[0048] As shown in Figure 7 A plurality of buffer baffle plates are arranged at the upper part of the oil collecting groove 230. The plurality of buffer baffle plates are fixedly arranged on both sides of the triangular oil collecting groove 230, i.e. fixedly arranged between the fourth baffle plate 170 and the inclined air outlet side plate 220. They are arranged in a direction perpendicular to the axial direction of the air intake device body 110 and staggered in the vertical direction, so that when the air compressor is running, the gas filtered by the filter core 120 can be further separated from impurities by the buffer baffle plates, and then discharged into the air outlet pipe 130 via the air outlet 221 and finally into the compressor main machine for compression, further improving the air intake filtration efficiency. After the air compressor stops, part of the oil-carrying gas will be back-flushed from the compressor main machine to the air outlet 221. At this time, the oil-carrying gas can separate the oil after impacting on the buffer baffle plate and collect in the oil collecting groove 230 below, so as to prevent the oil-carrying gas from back-flushing into the filter core 120, thereby improving the service life of the filter core.

[0049] For example, in Figure 7In the illustrated embodiment, two buffer baffles are shown, namely a fifth baffle 240 and a sixth baffle 250 arranged in a direction perpendicular to the axial direction of the air intake device body 110; wherein, the fifth baffle 240 is arranged in the vertical direction at a position lower than the sixth baffle 250, and the sixth baffle 250 is closer to the air outlet 221.

[0050] With the above structure, after the air in the environment is initially filtered, such as by pre-filter cotton, and then separated by multiple dust removal baffles (such as the first baffle 140A to the third baffle 140C), most of the dust can be separated and discharged from the intake device 100 through the lower dust removal ramp 114A and dust removal port 114B. The dust-laden gas that has undergone preliminary separation and filtration then undergoes further filtration through at least one filter element 120 to filter out almost all the remaining dust. The filtered gas enters the oil collection tank 230 through the air passage 210, and after being buffered by multiple buffer baffles, it enters the compressor host through the air outlet 130 via the air outlet 221. This can ensure dust separation efficiency in areas with a lot of dust in the air (such as desert areas) and improve the service life of the compressor.

[0051] Figure 8 A perspective view of the internal structure of an exhaust pipe 130 according to another embodiment of this disclosure is shown. Figure 8 In the embodiment shown, the outlet pipe 130 is provided with at least one inclined baffle, which extends downwardly from the inner wall of the outlet pipe 130, such that when oily gas is sprayed back from the compressor host, the oily gas collides with the at least one inclined baffle, and at least a portion of the oil droplets in the oily gas are separated and returned to the compressor host.

[0052] For example, such as Figure 8 As shown, in the embodiments of this disclosure, two inclined baffles are provided, namely a first inclined baffle 131 and a second inclined baffle 132. The first inclined baffle 131 and the second inclined baffle 132 are arranged opposite to each other in the air outlet pipe 130, and the first inclined baffle 131 is set closer to the air outlet 221 than the second inclined baffle 132.

[0053] With the above structure, when the oil-laden gas is ejected back from the compressor host, the oil-laden gas collides successively with the second inclined baffle 132 and the first inclined baffle 131 (e.g., Figure 8At least part of the oil in the gas is separated by impingement and returns to the compressor main body (as shown by the dashed line in FIG. 6); the remaining oil continues to enter the oil collection groove 230 of the air intake device body 110 with the gas through the gas outlet 221, and successively impinges on the sixth baffle 250 and the fifth baffle 240 (to play a buffering and separating role), thereby separating the remaining oil from the oil-laden gas and collecting the oil in the oil collection groove 230. In this way, the oil in the compressor main body is effectively prevented from being sprayed back into the air intake device 100, thereby improving the service life of the air intake device 100.

[0054] In an embodiment, as shown in FIG. 6, the air intake device 100 further comprises a blowdown port 260 arranged at the bottom of the inclined gas outlet side plate 220 and in communication with the oil collection groove 230, so that the oil collected in the oil collection groove 230 can be discharged through the blowdown port 260. Figure 2

[0055] In addition, the present disclosure also provides an air compressor comprising a compressor main body and the air intake device 100 described in the above embodiments connected to the compressor main body, which is not described herein.

[0056] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. Those skilled in the art should understand that the scope of the disclosure involved in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or equivalent features without departing from the above disclosed concept. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the present application (but not limited to) having similar functions.

[0057] In addition, although each operation is described in a specific order, this should not be understood as requiring the operations to be performed in the specific order shown or in a sequential order. In certain circumstances, multitasking and parallel processing can be advantageous. Similarly, although several implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present application. Certain features described in the context of separate embodiments can also be combined in a single embodiment. Conversely, various features described in the context of a single embodiment can also be separated and implemented in multiple embodiments.

[0058] Although the subject matter has been described in language specific to structural features and / or methodological acts, it is to be understood that the subject defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

[0059] ​The above has carried out the detailed explanation to the multiple embodiments of the application, but the application is not limited to these specific embodiments, and the person skilled in the art can make various modified embodiments on the basis of the concept of the application, and these modifications should fall within the scope of the application claimed.

Claims

1. An air intake device for an air compressor, characterized by, The air intake device comprises: an air intake device body having an air intake side, an air outlet side, a top plate and a bottom plate, the bottom plate being configured to extend upwardly and obliquely relative to the horizontal plane from the air intake side to the air outlet side, such that the upper surface of the bottom plate forms a dust discharge ramp; a plurality of dust removal baffles are arranged inside the air intake device body, and are configured to separate at least part of the dust in the gas by multiple impacts with the gas from the air intake side; at least one filter element is arranged inside the air intake device body downstream of the airflow direction of the plurality of dust removal baffles, for further filtering the gas. The plurality of dust removal baffles are arranged in sequence in the axial direction of the air intake device body and are staggered in the vertical direction, thereby forming an "S"-shaped airflow channel between the plurality of dust removal baffles.

2. The air intake device of claim 1, wherein The plurality of dust removal baffles comprise a first baffle and a second baffle arranged in sequence in the axial direction of the air intake device body; 3. The air intake device of claim 2, wherein The first baffle is arranged on the top plate of the air intake device body, and the second baffle is arranged on the bottom plate of the air intake device body. The plurality of dust removal baffles further comprise a third baffle arranged on the top plate of the air intake device body.

4. The air intake device of claim 3, wherein A plurality of notches are arranged at the bottom of the second baffle, and at least one dust discharge port is arranged at the position of the bottom plate close to the air intake side, so that the dust separated by the plurality of dust removal baffles can be guided through the notches on the dust discharge ramp, and then discharged from the at least one dust discharge port.

5. The air intake device of claim 3, wherein A dust discharge valve is connected to the lower surface of the bottom plate, and is configured to open or close the at least one dust discharge port.

6. The air intake device of claim 5, wherein The air intake device comprises an air outlet pipe connected to the air outlet side of the air intake device body, for guiding the filtered gas into the compressor main machine of the air compressor.

7. The air intake device of any one of claims 3 to 6, wherein, An inclined air outlet side plate is arranged at the air outlet side of the air intake device body, and an air outlet port for communicating with the air outlet pipe is arranged on the inclined air outlet side plate.

8. The air intake device of claim 7, wherein At least one inclined baffle is arranged in the air outlet pipe, and the at least one inclined baffle extends downwardly and obliquely from the inner wall of the air outlet pipe; 9. The air intake device of claim 8, wherein, The at least one inclined baffle is configured to collide with the oil-bearing gas when the oil-bearing gas is returned from the compressor main machine, so that at least part of the oil droplets in the oil-bearing gas are separated out and returned to the compressor main machine. A fourth baffle is further arranged inside the air intake device body, and an oil collection groove is formed between the inclined air outlet side plate and the fourth baffle; 10. The air intake device of claim 8, wherein A plurality of buffer baffles are further arranged at the upper part of the oil collection groove, and the plurality of buffer baffles are arranged in a direction perpendicular to the axial direction of the air intake device body and are staggered in the vertical direction. The plurality of buffer baffles comprise a fifth baffle and a sixth baffle arranged in a direction perpendicular to the axial direction of the air intake device body; 11. The air intake device of claim 10, wherein, The fifth baffle is arranged at a position lower than the sixth baffle in the vertical direction, and the sixth baffle is closer to the air outlet port. ​ 12. The air intake device of claim 10, wherein, The oil collecting groove is communicated with a drain opening formed at the bottom of the inclined air outlet side plate to drain the collected oil drops.

13. The air intake device of claim 9, wherein, The at least one inclined baffle includes a first inclined baffle and a second inclined baffle, which are oppositely arranged in the air outlet pipe.

14. The air intake device of claim 10, wherein, The air inlet device body is further provided with a filter core baffle, the filter core baffle, the fourth baffle, the third baffle and the top plate defining a filter core accommodating cavity, the at least one filter core being arranged in the filter core accommodating cavity, and at least one filter core air outlet hole corresponding to the at least one filter core being formed in the filter core baffle.

15. The air intake device of claim 14, wherein, The side plate of the air inlet device body is further provided with a filter core door, which is fixed by a hinge and locked by a door lock.

16. The air intake device of any one of claims 1 to 6, wherein, The air inlet device further includes pre-filter cotton arranged at the air inlet side of the air inlet device body.

17. An air compressor comprising a compressor main machine and an air inlet device as claimed in any one of claims 1-16 connected to the compressor main machine.

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