Oil mist recycling and filtering equipment

Abstract

The utility model discloses oil mist recycling and filtering equipment which comprises a case, a fan and a cyclone device are arranged in the case, the cyclone device is arranged at an air inlet of the fan and used for centrifugally filtering oil mist, a first inlet hole of the cyclone device is in butt joint with a first cavity, and a first outlet hole and a second outlet hole of the cyclone device are in butt joint with the fan and a second cavity respectively. The first cavity is provided with a first filter screen; an air outlet of the fan is provided with a fourth cavity, and the fourth cavity is provided with a second filter screen and a silencing cover arranged on the outer side of the second filter screen; a first connector and a second connector which are used for being connected with a pipeline are arranged at the bottom of the second cavity and the bottom of the fourth cavity. Oil mist is sucked into the machine box through the draught fan, the oil mist is preliminarily filtered through the first filter screen, fine mist particles are separated and filtered through centrifugal rotation generated by the cyclone device, third-time filtering is carried out through impact between the impeller of the draught fan and mist liquid, and finally the mist liquid is filtered again through the second filter screen to become clean gas to be discharged into air.

Description

Technical field:

[0001] The utility model relates to the technical field of industrial environmental protection equipment, in particular to an oil mist recovery and filtering device. Background technology:

[0002] Oil mist recovery and filtration equipment is an industrial environmental protection device used to recover and purify oil mist, water mist, and dust generated during machining processes. It is typically installed on machining equipment such as lathes, milling machines, and cleaning machines. Through a multi-stage interception and filtration system, it separates and recovers harmful airborne substances, thereby purifying the air and protecting worker health. This equipment not only effectively improves factory environmental quality and reduces harmful emissions, but also reduces equipment maintenance and labor insurance costs. Therefore, it has gained widespread application in the industrial manufacturing sector.

[0003] During machining, cutting fluids or lubricants generate large amounts of oil mist due to high temperatures and friction. This mist not only poses a threat to employee health but also affects the normal operation of workshop equipment, leading to equipment failures and increased maintenance costs. Oil mist recovery and filtration equipment removes and filters the oil mist generated during machining, reducing equipment wear and tear while also improving the air quality of the work environment.

[0004] For example, a Chinese patent publication numbered CN 208990472 U discloses an oil mist recovery machine. In the technical solution disclosed in the patent, an exhaust device performs exhaust operations, sucking exhaust gas generated by the machine into the oil mist recovery machine. An inlet filter 1 primarily blocks larger substances in the exhaust gas, such as flying iron filings, from entering the recovery machine. A first filter 4 primarily filters fine iron filings in the exhaust gas. A second filter 7 primarily filters oil mist and moisture in the exhaust gas, which adhere to the second filter 7. When the liquid attached to the first and second filters 4 and 7 reaches a certain mass, it drips onto an oil receiving plate 23. The liquid flows along the oil receiving plate 23 into an oil storage tank 22. An oil control valve 20 on the outer wall of the oil storage tank 22 controls the waste liquid collected in the oil storage tank 22 to be discharged out of the oil mist recovery machine along an oil drain pipe 21. After that, the filtered gas enters the detergent along the air outlet duct 11, the stirring device 15 works, the motor 19 drives the rotating shaft 25 to rotate rapidly, and the rotating blades 26 on the rotating shaft 25 drive the detergent to rotate, thereby increasing the number of contacts between the detergent and the discharged exhaust gas, removing the oil mist that has not been completely filtered in the exhaust gas, and the washed gas is discharged along the air outlet 24; the discharged gas is harmless to the environment and plays a role in protecting the working environment; when the detergent has washed a certain amount of exhaust gas, the machine is turned off, and the used detergent is discharged out of the oil mist recovery machine along the drain port 17 through the drain switch 16, and then the liquid inlet cover 12 is pulled up through the pull cover handle 13, and the special detergent is added into it and the liquid inlet cover 12 is covered to continue working.

[0005] However, in the solution disclosed in the above patent, the first filter 4 and the second filter 7 are used to filter the oil mist, which is not only inefficient, but also requires frequent replacement of the filter, which is costly to use. In addition, this filtering method has a poor recovery effect, resulting in a large amount of waste. Finally, the oil mist is cleaned with the detergent in the rear box 29, which also produces a large amount of waste liquid. This is not environmentally friendly and also causes additional processing fees, increasing the cost of use.

[0006] In view of this, the inventors propose the following technical solutions. Utility model content:

[0007] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an oil mist recovery and filtering device.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions: an oil mist recovery and filtering device, comprising: a chassis, a fan for making the oil mist flow in one direction and a cyclone device arranged at the air inlet of the fan and used for centrifugal filtering of the oil mist are arranged in the chassis, wherein the first inlet of the cyclone device is connected to the first cavity, the first outlet and the second outlet of the cyclone device are connected to the fan and the second cavity respectively, and a first filter is provided at the connection between the first cavity and the outside; a fourth cavity is provided at the air outlet of the fan, a second filter for filtering and a silencer cover arranged on the outside of the second filter are provided at the connection between the fourth cavity and the outside; a first connector and a second connector for connecting pipes are provided at the bottom of the second cavity and the fourth cavity.

[0009] Furthermore, in the above technical solution, the fourth cavity is provided with an air guide baffle located at the outlet end of the fan, which divides the fourth cavity into an upper cavity and a lower cavity, and the upper cavity and the lower cavity are connected above the air guide baffle; the air guide baffle is provided with a silencer module for reducing impact noise.

[0010] Furthermore, in the above technical solution, the air outlet of the fan is arranged at an angle, and the wind guide baffle includes an inclined plate portion located at the front end of the air outlet of the fan and a vertical plate portion extending vertically upward along the inclined plate portion.

[0011] Furthermore, in the above technical solution, a first mounting plate for obliquely mounting the fan is provided in the chassis, a second mounting plate for mounting the cyclone device and aligning the cyclone device obliquely with the fan is provided below the first mounting plate, a third cavity is provided between the second mounting plate and the first mounting plate, and the inclined bottom extension device of the first mounting plate is provided with a fourth cavity.

[0012] Furthermore, in the above technical solution, a third mounting plate is provided below the second mounting plate, and the third mounting plate is used to separate the first cavity and the second cavity, and a cyclone pipe for connecting the first cavity and the cyclone device is provided on the third mounting plate, and the cyclone pipe is connected to the first inlet hole of the cyclone device.

[0013] Furthermore, in the above technical solution, the third mounting plate is in the form of an "L"-shaped cover and is arranged on the first filter net, and the third mounting plate includes an inclined plate that is obliquely aligned with the second mounting plate and is used to install the cyclone pipe, and a vertical plate arranged at one end of the inclined plate for support, and the lower end of the wind guide baffle is provided with a first partition that separates the fourth cavity from the third cavity and the second cavity, wherein one end of the first mounting plate and the second mounting plate is fixed on the first partition, and the vertical plate in the third mounting plate is separated from the first partition, and the first connecting head is located in the interval space.

[0014] Furthermore, in the above technical solution, multiple cyclone devices are provided on the second mounting plate, and the fan includes a fan casing installed on the first mounting plate, a fan impeller provided on the fan casing, and a motor for driving the fan impeller to rotate in the fan casing, wherein the air inlet of the fan casing is located in the third cavity, and the air outlet of the fan casing is located in the fourth cavity.

[0015] Furthermore, in the above technical solution, a second partition is installed on the first mounting plate, which is flush with the fan outlet and is used to separate the fourth cavity. A fifth cavity for accommodating the fan is also formed between the second partition and the first mounting plate; the chassis is also provided with a switch, a speed regulator, a potentiometer, and a circuit board box located in the fifth cavity.

[0016] Furthermore, in the above technical solution, the cyclone device includes a first inlet hole located in the center, a plurality of first outlet holes and a second outlet hole arranged on the periphery of the first inlet hole and facing upward and downward respectively, and a plurality of guide air ducts connected to the central first inlet hole and spirally coiled outward on the first outlet hole one by one, wherein the first outlet hole and the second outlet hole are coaxial as a group, and the first outlet hole is connected to the air inlet of the fan, and the second outlet hole is located in the second cavity; the second outlet hole is funnel-shaped and faces downward, and the end of the guide air duct is wound around the inner wall of the second outlet hole.

[0017] Furthermore, in the above technical solution, the second filter is vertically installed in the fourth cavity and is vertically located on one side of the first cavity, the second cavity and the fourth cavity. The silencer is located on the outside of the second filter and is filled with silencer cotton. The bottom of the silencer is provided with an exhaust port for discharging purified air, and the exhaust port extends outward and is provided with a guide drawer.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0019] 1. The utility model divides the chassis into a first cavity, a second cavity, and a third cavity. The fan arranged in the chassis generates suction to draw the oil mist into the chassis. The oil mist is first preliminarily filtered by the first filter to intercept and filter out large particles of debris and other impurities. The cyclone device then generates centrifugal rotation to separate and filter the finer mist particles, so that the mist liquid with particles larger than 0.01mm falls into the second cavity from the second outlet through centrifugal separation. The oil is recovered to the liquid tank of the machine tool through a pipe connected to the first connector at the bottom of the second cavity. After the mist liquid enters the fan from the first outlet, it is filtered for the third time by the collision between the fan impeller and the mist liquid. Finally, the mist liquid is filtered again by the second filter and becomes clean gas and is discharged into the air. The silencer intercepts the mist liquid and eliminates the noise, ensuring that the mist liquid can be fully filtered by the second filter.

[0020] 2. The utility model adopts an air guide baffle at the air outlet of the fan. The air guide baffle can not only prevent the wind from directly blowing the second filter screen and reduce the noise, but also reduce the flow rate of the mist liquid impacting the second filter plate to ensure the filtering effect. At the same time, the air guide baffle can also collect the oil filtered by the fan so that the oil can be discharged into the fourth cavity. The silencer module is set on the air guide baffle to reduce the noise generated by the mist liquid blown out of the fan directly hitting the air guide baffle, thereby further reducing the noise. In this embodiment, the silencer module is a silencer cotton.

[0021] 3. In the present invention, the air outlet of the fan is tilted so that the oil filtered and separated in the fan can flow out smoothly, and the wind shield is set as an inclined plate portion and a vertical plate portion. One is to prevent the mist blown out by the fan from spraying directly onto the second filter screen, and the inclined plate portion can be used to guide and reduce the impact; the other is to intercept and collect the oil discharged from the fan so that it can be concentrated into the fourth cavity and discharged from the second connector back to the machining fluid tank of the machine tool. Description of the drawings:

[0022] Figure 1 It is a three-dimensional diagram of the utility model;

[0023] Figure 2 The internal structure of the utility model Figure 1 ;

[0024] Figure 3 The internal structure of the utility model Figure 2 ;

[0025] Figure 4 This is a cross-sectional view of the utility model Figure 1 ;

[0026] Figure 5 This is a cross-sectional view of the utility model Figure 2 ;

[0027] Figure 6 It is a cross-sectional view of the cyclone device in the utility model. Specific implementation method:

[0028] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0029] See Figures 1 to 6 As shown, an oil mist recovery and filtering device includes a chassis 1, in which a fan 2 for making the oil mist flow in one direction and a cyclone device 3 arranged at the air inlet of the fan 2 and used for centrifugal filtering of the oil mist are provided. The first inlet 31 of the cyclone device 3 is connected to the first cavity A, and the first outlet 32 ​​and the second outlet 33 of the cyclone device 3 are connected to the fan 2 and the second cavity B respectively, and a first filter 4 is provided at the connection between the first cavity A and the outside; a fourth cavity D is provided at the air outlet of the fan 2, and a second filter 5 for filtering and a silencer 6 arranged on the outside of the second filter 5 are provided at the connection between the fourth cavity D and the outside; a first connector 11 and a second connector 12 for connecting pipes are provided at the bottom of the second cavity B and the fourth cavity D. The chassis 1 is divided into a first cavity A, a second cavity B, and a third cavity C. The fan 2 arranged in the chassis 1 generates suction to draw the oil mist into the chassis 1. The oil mist is first preliminarily filtered by the first filter 4 to intercept and filter out large particles and impurities such as debris. The cyclone device 3 then generates centrifugal rotation to separate and filter the finer mist particles, so that the mist liquid with particles larger than 0.01 mm falls into the second cavity B from the second outlet 33 through centrifugal separation. The oil is recovered to the liquid tank of the machine tool through a pipe connected to the first connector 11 at the bottom of the second cavity B. When the mist liquid enters the fan 22 from the first outlet 32, it is filtered for the third time by the collision between the fan impeller and the mist liquid. Finally, the mist liquid is filtered again by the second filter 5 and becomes clean gas and is discharged into the air. The silencer 6 intercepts the mist liquid and eliminates the noise to ensure that the mist liquid can be fully filtered by the second filter 5.

[0030] The fourth cavity D is provided with an air guide baffle 13 at the outlet end of the fan 2. The air guide baffle 13 divides the fourth cavity D into an upper cavity D1 and a lower cavity D2, with the upper cavity D1 and the lower cavity D2 communicating above the air guide baffle 13. A silencer module 7 is provided on the air guide baffle 13 to reduce impact noise. The air guide baffle 13 provided at the outlet of the fan 2 not only prevents wind from directly hitting the second filter 5, thereby reducing noise, but also reduces the velocity of mist impacting the second filter 5, thereby ensuring effective filtration. The air guide baffle 13 also collects filtered oil from the fan 2 for easy discharge into the fourth cavity D. The silencer module 7 is also provided on the air guide baffle 13 to reduce noise generated by mist directly impacting the air guide baffle 13, further reducing noise. In this embodiment, the silencer module 7 is a sound-absorbing cotton pad.

[0031] The air outlet of the fan 2 is tilted, and the wind deflector 13 includes an inclined plate portion 131 located at the front end of the air outlet of the fan 2 and a vertical plate portion 132 extending vertically upward along the inclined plate portion 131. The air outlet of the fan 2 is tilted so that the oil filtered and separated in the fan 2 can flow out smoothly. The wind deflector 13 is configured with the inclined plate portion 131 and the vertical plate portion 132. Firstly, it is to prevent the mist blown out by the fan 2 from being directly sprayed onto the second filter 5. The inclined plate portion 131 can effectively guide and reduce the impact; secondly, it is to intercept and collect the oil discharged from the fan 2 so that it can be concentrated and flowed into the fourth cavity D, and discharged from the second connector 12 back to the machining fluid tank of the machine tool.

[0032] A first mounting plate 14 for obliquely mounting the fan 2 is provided in the chassis 1, and a second mounting plate 15 for mounting the cyclone device 3 and aligning the cyclone device 3 obliquely with the fan 2 is provided below the first mounting plate 14. A third cavity C is provided between the second mounting plate 15 and the first mounting plate 14, and a fourth cavity D is provided on the inclined bottom extension device of the first mounting plate 14. A first mounting plate 14 and a second mounting plate 15 are arranged in an inclined manner in the chassis 1. The inclined layout of the first mounting plate 14 is used to ensure that the air outlet of the fan 2 is inclined toward the fourth cavity D, so that the oil separated in the fan 2 is quickly collected and discharged from the air outlet, and drained into the fourth cavity D through the first mounting plate 14. The second mounting plate 15 is arranged to be inclined flush with the first mounting plate 14 to ensure that the air outlet of the cyclone device 3 is consistent with the air inlet of the fan 2, so that the suction force generated by the fan 2 is transferred to the first cavity A to the greatest extent, not only to inhale the oil mist, but also to enable the oil mist to be centrifugally separated in the cyclone device 3 to achieve efficient filtration.

[0033] A third mounting plate 16 is provided below the second mounting plate 15. The third mounting plate 16 is used to separate the first cavity A from the second cavity B. A cyclone pipe 35 is provided on the third mounting plate 16 for connecting the first cavity A to the cyclone device 3. The cyclone pipe 35 is docked with the first inlet 31 of the cyclone device 3. The third mounting plate 16 is provided in an L-shaped configuration on the first filter screen 4. The third mounting plate 16 includes an inclined plate 161 that is aligned with the second mounting plate 15 and is used to mount the cyclone pipe 35, and a vertical plate 162 provided at one end of the inclined plate 161 for support. A first partition 17 is provided at the lower end of the air guide baffle 13 to separate the fourth cavity D from the third cavity C and the second cavity B. One end of the first mounting plate 14 and the second mounting plate 15 are fixed to the first partition 17, while the vertical plate 162 in the third mounting plate 16 is spaced apart from the first partition 17, and the first connector 11 is located within the spaced-apart space. The third mounting plate 16 is configured as a two-part structure consisting of an inclined plate 161 and a vertical plate 162. The inclined plate 161 guides the oil flowing out of the second outlet 33 of the cyclone device 3 to the bottom of the second cavity B, where it is then collected at the first connector 11. In this embodiment, the first mounting plate 14 and the second mounting plate 15 are both L-shaped, and the first partition 17 is formed by splicing the vertical plate portions of the first mounting plate 14 and the second mounting plate 15.

[0034] A plurality of cyclone devices 3 are provided on the second mounting plate 15, and the fan 2 includes a fan casing 21 installed on the first mounting plate, a fan impeller provided in the fan casing 21, and a motor 23 for driving the fan impeller to rotate in the fan casing 21, wherein the air inlet of the fan casing 21 is located in the third cavity C, and the air outlet of the fan casing 21 is located in the fourth cavity D.

[0035] A second partition 18 is mounted on the first mounting plate 14, flush with the air outlet of the fan 2 and used to separate the fourth cavity D. A fifth cavity E for accommodating the fan 2 is formed between the second partition 18 and the first mounting plate 14. The chassis 1 is also provided with a switch 101, a speed regulator 102, a potentiometer 103, and a circuit board box 104, which are located within the fifth cavity E. The chassis 1 is also provided with a handle 105 and an elbow 106.

[0036] The cyclone device 3 includes a centrally located first inlet 31, a plurality of first and second outlets 32, 33 disposed peripherally of the first inlet 31 and facing upward and downward, respectively, and a plurality of air guide ducts 34 connected to the central first inlet 31 and spirally wound outwardly around the first outlet 32. The first outlet 32 ​​and the second outlet 33 are coaxially arranged in a group, and the first outlet 32 ​​connects to the air inlet of the fan 2, while the second outlet 33 is located within the second cavity B. The second outlet 33 is funnel-shaped and faces downward, and the end of the air guide duct 34 winds around the inner wall of the second outlet 33. The bottom of the chassis 1 also includes an air inlet A1 for connecting the first cavity A to the outside, and a first filter 4 is installed within the air inlet A1.

[0037] The second filter 5 is vertically installed in the fourth cavity D and is located vertically on one side of the first cavity A, the second cavity B, and the fourth cavity D. The silencer cover 6 is located outside the second filter 5 and is filled with silencer cotton. The bottom of the silencer cover 6 is provided with an exhaust port for exhausting purified air, and the exhaust port extends outwardly and is provided with a diversion drawer 8. The first filter 4 is a metal filter, and the second filter 5 is a glass fiber high-efficiency filter.

[0038] In summary, in the present invention, the air inlet A1 of the first cavity A is connected to the exhaust port of the machine tool through a pipe, and the air with liquid mist (which can be oil or water) is sucked in through the air inlet A1 at the bottom of the chassis 1 by the suction force generated by the fan 2. After the uniform flow through the first cavity A, the gas enters the cyclone pipe 35, and multiple groups of cyclone devices 3 separate and filter the finer mist particles. The mist liquid with particles larger than 0.01mm falls into the second cavity B through centrifugal separation, and is connected to the hose by the pagoda-shaped first connector 11 at the bottom of the chassis 1 and returns to the liquid tank of the machine tool; further, the air that has passed through two layers of pre-filtration is filtered for the third time by passing through the centrifugal fan 2 through the fan impeller and the liquid-containing gas to collide with the fan volute, and the liquid filtered by the fan 2 passes through the slope of the inclined first mounting plate 14. It flows into the fourth cavity D, and the recovered liquid flows into the machining liquid tank of the machine tool through the pagoda-shaped second connector 12 at the bottom of the fourth cavity D. Finally, the clean air is deeply filtered by the second high-density glass fiber filter 5. The filtered liquid is pressed down by the second filter 5 through natural downward flow and the air flow generated by the air outlet of the fan 2 and returned to the second connector 12 of the fourth cavity D, and flows back to the machining liquid tank of the machine tool. The clean air is silenced by the silencer 6 and then discharged into the room after being evenly distributed by the guide drawer 8 under the silencer 6 to achieve a quiet and clean effect. This product uses a brushless permanent magnet motor, which can save energy and improve motor efficiency. The product has high filtration accuracy and good filtration effect. Through efficient multi-stage pre-pass rate, it achieves the effect of saving consumables and energy saving and quietness.

[0039] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made based on the structure, features and principles described in the scope of the patent application of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. An oil mist recovery and filtration device, comprising a housing (1), characterized in that: The chassis (1) is provided with a fan (2) for causing the oil mist to flow in one direction, and a cyclone device (3) provided at the air inlet of the fan (2) and used for centrifugal filtering of the oil mist, wherein a first inlet hole (31) of the cyclone device (3) is connected to the first cavity (A), a first outlet hole (32) and a second outlet hole (33) of the cyclone device (3) are connected to the fan (2) and the second cavity (B) respectively, and a first filter (4) is provided at the connection between the first cavity (A) and the outside; The air outlet of the fan (2) is provided with a fourth cavity (D), and the portion where the fourth cavity (D) communicates with the outside is provided with a second filter (5) for filtering and a silencer (6) arranged outside the second filter (5); A first connector (11) and a second connector (12) for connecting pipelines are provided at the bottom of the second cavity (B) and the fourth cavity (D).

2. The oil mist recovery and filtration equipment according to claim 1, characterized in that: The fourth cavity (D) is provided with an air guide baffle (13) located at the outlet end of the fan (2), and the air guide baffle (13) divides the fourth cavity (D) into an upper cavity (D1) and a lower cavity (D2), and the upper cavity (D1) and the lower cavity (D2) are connected above the air guide baffle (13); and a silencer module (7) for reducing impact noise is provided on the air guide baffle (13).

3. The oil mist recovery and filtration equipment according to claim 2, characterized in that: The air outlet of the fan (2) is arranged at an angle, and the air guide baffle (13) comprises an inclined plate portion (131) located at the front end of the air outlet of the fan (2) and a vertical plate portion (132) extending vertically upward along the inclined plate portion (131).

4. The oil mist recovery and filtration equipment according to claim 3, characterized in that: A first mounting plate (14) for obliquely mounting the fan (2) is provided in the chassis (1); a second mounting plate (15) for mounting the cyclone device (3) and aligning the cyclone device (3) with the fan (2) in an oblique manner is provided below the first mounting plate (14); a third cavity (C) is provided between the second mounting plate (15) and the first mounting plate (14); and a fourth cavity (D) is provided by extending the oblique bottom of the first mounting plate (14).

5. The oil mist recovery and filtering equipment according to claim 4, characterized in that: A third mounting plate (16) is provided below the second mounting plate (15), and the third mounting plate (16) is used to separate the first cavity (A) and the second cavity (B). A cyclone pipe (35) for connecting the first cavity (A) and the cyclone device (3) is provided on the third mounting plate (16), and the cyclone pipe (35) is connected to the first inlet hole (31) of the cyclone device (3).

6. The oil mist recovery and filtering equipment according to claim 5, characterized in that: The third mounting plate (16) is an L-shaped cover mounted on the first filter screen (4), and the third mounting plate (16) includes an inclined plate (161) arranged to be obliquely aligned with the second mounting plate (15) and used to mount the cyclone pipe (35), and a vertical plate (162) arranged at one end of the inclined plate (161) for support. The lower end of the wind guide baffle (13) is provided with a first partition (17) for separating the fourth cavity (D) from the third cavity (C) and the second cavity (B), wherein one end of the first mounting plate (14) and the second mounting plate (15) are fixed on the first partition (17), and the vertical plate (162) in the third mounting plate (16) is spaced apart from the first partition (17), and the first connector (11) is located in the spaced apart space.

7. The oil mist recovery and filtration equipment according to claim 4, characterized in that: A plurality of cyclone devices (3) are provided on the second mounting plate (15), and the fan (2) comprises a fan housing (21) mounted on the first mounting plate, a fan impeller provided on the fan housing (21), and a motor (23) for driving the fan impeller to rotate in the fan housing (21), wherein the air inlet of the fan housing (21) is located in the third cavity (C), and the air outlet of the fan housing (21) is located in the fourth cavity (D).

8. The oil mist recovery and filtering equipment according to claim 4, characterized in that: A second partition (18) is mounted on the first mounting plate (14), flush with the air outlet of the fan (2) and used to separate the fourth cavity (D); a fifth cavity (E) for accommodating the fan (2) is formed between the second partition (18) and the first mounting plate (14); and a switch (101), a speed regulator (102), a potentiometer (103), and a circuit board box (104) are also provided on the chassis (1), which are located in the fifth cavity (E).

9. The oil mist recovery and filtration equipment according to any one of claims 1 to 8, characterized in that: The cyclone device (3) comprises a first inlet hole (31) located in the center, a plurality of first outlet holes (32) and second outlet holes (33) arranged on the periphery of the first inlet hole (31) and facing upward and downward respectively, and a plurality of guide air ducts (34) connected to the central first inlet hole (31) and spirally wound outwardly on the first outlet hole (32), wherein the first outlet hole (32) and the second outlet hole (33) are coaxial and form a group, and the first outlet hole (32) is connected to the air inlet of the fan (2), and the second outlet hole (33) is located in the second cavity (B); the second outlet hole (33) is funnel-shaped and faces downward, and the end of the guide air duct (34) is wound around the inner wall of the second outlet hole (33).

10. The oil mist recovery and filtration equipment according to any one of claims 1 to 8, characterized in that: The second filter (5) is vertically installed in the fourth cavity (D) and is vertically located on one side of the first cavity (A), the second cavity (B) and the fourth cavity (D). The silencer (6) is located outside the second filter (5) and is filled with silencer cotton. An exhaust port for discharging purified air is provided at the bottom of the silencer (6), and a guide drawer (8) is provided extending outward from the exhaust port.

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