An internal circulation oil fume air purifier

Abstract

The present application belongs to the technical field of oil fume purification, and particularly relates to an internal circulation oil fume air purifier. In the use of the existing internal circulation oil fume air purifier, oil fume is directly sucked and then purified before being discharged, which leads to poor oil fume purification effect, and thus the discharged oil fume cannot meet the smoke emission standard. The present application proposes the following scheme, which comprises a shell, an installation groove is formed in the interior of the shell, and a slitting adsorption assembly is arranged in the interior of the installation groove. The slitting adsorption assembly comprises a driving motor and a ventilation rack, and a partition rod is fixedly connected to the opposite side of each ventilation rack at equal distances, and an installation hole one is formed in one side of each partition rod. The disclosed internal circulation oil fume air purifier has the beneficial effects of avoiding direct purification of the sucked oil fume, improving the oil fume purification effect, and making the discharged oil fume meet the emission standard.

Description

Technical Field

[0001] This invention relates to the field of oil fume purification technology, and in particular to an internal circulation oil fume air purifier. Background Technology

[0002] When oil is heated above 200°C, it produces acrolein, the main component of cooking fumes. Acrolein has a strong pungent odor and is highly irritating to the mucous membranes of the nose, eyes, and throat, which can cause respiratory diseases such as rhinitis, pharyngitis, and bronchitis. When oil is heated to the point of "spitting fire," the oil temperature exceeds 300°C. At this point, in addition to producing acrolein, condensates are also formed, leading to chronic poisoning and easily inducing respiratory and digestive system cancers. Therefore, the purification of cooking fumes becomes very important.

[0003] Air purifiers, also known as air cleaners, air fresheners, and purifiers, are products that can adsorb, decompose, or transform various air pollutants (generally including PM2.5, dust, pollen, odors, and formaldehyde from renovations, bacteria, and allergens), effectively improving air cleanliness. They are mainly categorized into household, commercial, industrial, and building purifiers. Air purifiers utilize various technologies and media to provide users with clean and safe air. Commonly used air purification technologies include: adsorption technology, negative (positive) ion technology, catalytic technology, photocatalytic technology, superstructure photomineralization technology, HEPA high-efficiency filtration technology, and electrostatic dust collection technology. Most existing air purifiers are composite types, employing multiple purification technologies and materials simultaneously. Currently, kitchen fume purifiers have become indispensable purification equipment in the environmental protection industry, with more and more restaurants seeking efficient fume purification equipment that meets their needs while also being environmentally friendly.

[0004] The internal circulation kitchen fume air purifier is a revolutionary kitchen fume purifier that can directly discharge purified kitchen fumes indoors without the need for ductwork, achieving complete purification of kitchen fumes, zero emissions, and no cleaning required. Existing internal circulation kitchen fume air purifiers directly absorb, purify, and discharge kitchen fumes during use, resulting in poor fume purification effects and failure to meet exhaust standards when discharged to the outside. Summary of the Invention

[0005] This invention discloses an internal circulation oil fume air purifier, which aims to solve the technical problem in the prior art that existing internal circulation oil fume air purifiers directly absorb, purify, and then discharge oil fumes during use, resulting in poor oil fume purification effect and thus failing to meet exhaust emission standards when the oil fumes are discharged to the outside.

[0006] This invention proposes an internal circulation oil fume air purifier, comprising a housing with an internal mounting groove. The mounting groove houses a slitting adsorption assembly, which includes a drive motor and ventilation frames. Two ventilation frames are equidistantly connected to opposite sides with partition rods. Each partition rod has a mounting hole (first type) on one side. A rotating shaft is connected to the interior of two opposite mounting holes (first type) via bearings. A slitting blade is fixedly connected to the exterior of each rotating shaft. A fixing block is fixedly connected to one side of two adjacent slitting blades. Each fixing block has mounting holes (second type) on both sides. The interior of two opposite mounting holes (second type) is connected to... The bearing is connected to a rotating shaft, and the same linkage frame is fixedly connected to the outside of two adjacent rotating shafts. Two limiting blocks are fixedly connected to one side of the mounting groove, and a through hole is opened on one side of each of the two limiting blocks. A reciprocating push-pull rod is slidably connected inside the two through holes. The same moving frame is fixedly connected to the opposite side of the two reciprocating push-pull rods. A rotating disk is fixedly connected to the drive end of the drive motor, and a pushing rod is fixedly connected to the side of the rotating disk facing the moving frame. The pushing rod is located inside the moving frame. The same adsorption frame is fixedly connected to the opposite side of multiple separating rods, and an air guide block is fixedly connected inside the multiple adsorption ports of the adsorption frame.

[0007] By incorporating a slicing adsorption component, when using this range hood, the drive motor can be activated while the fan is absorbing and purifying the fumes. The drive motor drives the rotating disc to rotate, and the pushing rod on the rotating disc moves in a circular motion, causing the moving frame to move horizontally back and forth. This causes one end of one of the slicing sections to move back and forth in an arc shape, which in turn causes the remaining slicing sections to move in an arc shape simultaneously via the linkage frame. This allows the fan to absorb the fumes while the slicing sections disperse them, and then the fumes are further divided by the air guide block. This ensures that the adsorption frame evenly purifies the fumes before discharging them, avoiding direct purification of the absorbed fumes and improving the fume purification effect, ensuring that the discharged fumes meet emission standards.

[0008] In a preferred embodiment, an intermittent impact assembly is provided on one side of the housing, and the intermittent impact assembly includes a support.

[0009] In a preferred embodiment, the bracket has an installation opening on one side, and a track is fixedly connected to one side of the installation opening. A rubber slide rod is slidably connected inside the track, and a toothed rod is fixedly connected to one side of the rubber slide rod.

[0010] In a preferred embodiment, mounting holes three are provided on both sides of the mounting opening on the bracket, and the interiors of the two opposite mounting holes three are connected to the same rotating shaft two through bearings, and a half-tooth block is fixedly connected to the outside of the rotating shaft two.

[0011] In a preferred embodiment, a weighted frame is fixedly connected to the top of the rubber slide rod, and a slide rod is fixedly connected to one side of the weighted frame. A mounting base is fixedly connected to one side of the bracket, and a motor is fixedly connected to one side of the mounting base. The drive end of the motor is fixedly connected to one end of the rotating shaft two via a coupling.

[0012] In a preferred embodiment, an air outlet is provided on one side of the housing, and telescopic springs are fixedly connected at equal distances on both sides of the air outlet. The same air outlet plate is fixedly connected to the outside of each telescopic spring, and air outlet holes are provided at equal distances on one side of the air outlet plate.

[0013] By incorporating an intermittent impact component, when venting purified fumes, the exhaust panel is prone to blockage due to prolonged exposure to the fumes. In this case, the motor is activated, driving the semi-toothed block on the rotating shaft to rotate. When the toothed end of the semi-toothed block engages with the toothed rod on the rubber slide rod, the semi-toothed block causes the rubber slide rod to rise within the track. As the semi-toothed block continues to rotate and separates from the toothed rod, the rubber slide rod instantly falls and impacts the exhaust panel. Upon impact, the telescopic spring causes the exhaust panel to shake, separating impurities from the exhaust panel and preventing poor airflow. Depending on the usage of the range hood, a counterweight can be added to the weighted frame to increase the impact force of the rubber slide rod on the exhaust panel, resulting in better cleaning.

[0014] In a preferred embodiment, a lifting assembly is provided on the outside of the housing, and the lifting assembly includes a base plate.

[0015] In a preferred embodiment, two round guide rods are fixedly connected to one side of each of the two base plates, two limiting frames are fixedly connected to both sides of the housing, the two round guide rods are slidably connected inside the limiting frames, telescopic cylinders are fixedly connected to both sides of each of the two base plates, a stop block is fixedly connected to one end of each of the two telescopic cylinders, one side of the stop block is fixedly connected to one side of the housing, and two universal wheels are fixedly connected to the bottom of each of the two base plates.

[0016] With a lifting mechanism, the range hood can be quickly raised and lowered by a telescopic cylinder that drives the stop block, making it easy for staff to clean and maintain. During the lifting process, the range hood is guided and limited by a round guide rod, making its movement more stable.

[0017] In a preferred embodiment, a rotating block is fixedly connected to one side of one of the slices, and mounting holes four are provided on both sides of the rotating block and one of the reciprocating push-pull rods. The interiors of the two opposing mounting holes four are connected to a rotating shaft one through a bearing, and the exteriors of the two rotating shafts one are fixedly connected to the same moving rod.

[0018] In a preferred embodiment, two sliding grooves are provided on one side of the housing, and a push-pull slide rod is slidably connected inside each of the two sliding grooves. One side of the push-pull slide rod is fixedly connected to one side of the ventilation frame. The fan body is fixedly connected to one side of the ventilation frame located above. An air inlet is provided at the bottom of the housing. An air inlet plate is fixedly connected inside the air inlet. Air inlet holes are provided at equal intervals on one side of the air inlet plate. A sealing plate is connected to one side of the housing via a hinge.

[0019] As can be seen from the above, the internal circulation oil fume air purifier provided by the present invention has the beneficial effect of avoiding direct purification of the absorbed oil fumes, improving the oil fume purification effect, and making the emitted oil fumes meet the emission standards. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of an internal circulation oil fume air purifier proposed in this invention; Figure 2 This is a side view of the internal circulation oil fume air purifier proposed in this invention; Figure 3 This is a schematic diagram of the shell structure of an internal circulation oil fume air purifier proposed in this invention; Figure 4 This is a schematic diagram of the slitting adsorption component structure of an internal circulation oil fume air purifier proposed in this invention; Figure 5 This is a schematic diagram of the slitting adsorption component of an internal circulation oil fume air purifier proposed in this invention; Figure 6 This is a schematic diagram of the intermittent impact component structure of an internal circulation oil fume air purifier proposed in this invention; Figure 7 This is a cross-sectional schematic diagram of the adsorption frame of an internal circulation oil fume air purifier proposed in this invention.

[0021] In the diagram: 1. Housing; 2. Sealing plate; 3. Mounting groove; 4. Air inlet plate; 5. Sliding and adsorption assembly; 501. Push-pull slide bar; 502. Ventilation frame; 503. Divider bar; 504. Rotating shaft; 505. Sliding slice; 506. Fixing block; 507. Rotating shaft; 508. Linkage frame; 509. Rotating block; 510. Rotating shaft one; 511. Moving rod; 512. Limiting block; 513. Reciprocating push-pull rod; 514. Drive motor; 515. Rotating disc; 516. Moving frame; 517. Pushing rod; 51 8. Adsorption frame; 519. Air guide block; 520. Fan body; 6. Intermittent impact assembly; 601. Bracket; 602. Track; 603. Rubber slide bar; 604. Toothed rod; 605. Mounting base; 606. Motor; 607. Rotating shaft two; 608. Half toothed block; 609. Weighted frame; 610. Slide bar; 611. Telescopic spring; 612. Air outlet plate; 7. Lifting assembly; 701. Limiting frame; 702. Telescopic cylinder; 703. Abutment block; 704. Round guide rod; 705. Base plate; 706. Casters. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] The internal circulation oil fume air purifier disclosed in this invention is mainly used in scenarios where the internal circulation oil fume air purifier directly absorbs, purifies, and then discharges the oil fumes during use, resulting in poor oil fume purification effect and causing the oil fumes emitted to the outside to fail to meet the smoke emission standards.

[0024] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 7An internal circulation oil fume air purifier includes a housing 1. An installation groove 3 is provided inside the housing 1, and a slitting adsorption assembly 5 is disposed inside the installation groove 3. The slitting adsorption assembly 5 includes a drive motor 514 and ventilation frames 502. Two partition rods 503 are fixedly connected at equal intervals to opposite sides of two ventilation frames 502. Each partition rod 503 has a mounting hole on one side. A rotating shaft 504 is connected to the interior of two opposite mounting holes 504 via bearings. A slitting blade 505 is fixedly connected to the exterior of each rotating shaft 504. A fixing block 506 is fixedly connected to one side of two adjacent slitting blades 505. Two mounting holes 507 are provided on both sides of each fixing block 506. A rotating shaft 507 is connected to the interior of two opposite mounting holes 506 via bearings. Two adjacent rotating shafts 507 are externally fixedly connected to the same linkage frame 508. Two limiting blocks 512 are fixedly connected to one side of the mounting groove 3, and each of the two limiting blocks 512 has a through hole on one side. A reciprocating push-pull rod 513 is slidably connected inside the two through holes. The same moving frame 516 is fixedly connected to the opposite side of the two reciprocating push-pull rods 513. A rotating disk 515 is fixedly connected to the drive end of the drive motor 514, and a pushing rod 517 is fixedly connected to the side of the rotating disk 515 facing the moving frame 516. The pushing rod 517 is located inside the moving frame 516. The same adsorption frame 518 is fixedly connected to the opposite side of multiple separator rods 503, and air guide blocks 519 are fixedly connected inside the multiple adsorption ports of the adsorption frame 518.

[0025] In specific application scenarios, when using this range hood, when the fan is absorbing and purifying the fumes, the drive motor 514 can be started. The drive motor 514 drives the rotating disk 515 to rotate. When the push rod 517 on the rotating disk 515 moves in a circular motion, the push rod 517 drives the moving frame 516 to move horizontally back and forth. This causes the reciprocating push-pull rod 513 to drive one end of one of the slices 505 to move back and forth in an arc shape. This slice 505, through the linkage frame 508, drives one end of the remaining slices 505 to move in an arc shape at the same time. This allows the fan to absorb the fumes while the slices 505 disperse the fumes. Then, the fumes are further divided by the air guide block 519, so that the adsorption frame 518 can evenly purify the fumes before discharging them. This avoids directly purifying the absorbed fumes, improves the fume purification effect, and ensures that the discharged fumes meet emission standards.

[0026] Reference Figure 1 and Figure 6 An intermittent impact assembly 6 is provided on one side of the housing 1, and the intermittent impact assembly 6 includes a bracket 601.

[0027] Reference Figure 6The bracket 601 has an installation port on one side, and a track 602 is fixedly connected to one side of the installation port. A rubber slide rod 603 is slidably connected inside the track 602, and a toothed rod 604 is fixedly connected to one side of the rubber slide rod 603.

[0028] Reference Figure 6 Mounting holes 3 are provided on both sides of the mounting port on bracket 601, and the two opposite mounting holes 3 are connected to the same rotating shaft 2 607 through bearings. A half tooth block 608 is fixedly connected to the outside of the rotating shaft 2 607.

[0029] Reference Figure 6 A weighted frame 609 is fixedly connected to the top of the rubber slide rod 603, and a slide rod 610 is fixedly connected to one side of the weighted frame 609. A mounting base 605 is fixedly connected to one side of the bracket 601, and a motor 606 is fixedly connected to one side of the mounting base 605. The drive end of the motor 606 is fixedly connected to one end of the rotating shaft 607 via a coupling.

[0030] Reference Figure 1 An air outlet is provided on one side of the housing 1, and telescopic springs 611 are fixedly connected at equal distances on both sides of the air outlet. The same air outlet plate 612 is fixedly connected to the outside of each telescopic spring 611, and air outlet holes are provided at equal distances on one side of the air outlet plate 612.

[0031] In specific application scenarios, when venting purified fumes, the exhaust panel 612 is prone to blockage due to prolonged exhaust. In this case, the motor 606 can be activated, driving the semi-toothed block 608 on the rotating shaft 607 to rotate. When the toothed end of the semi-toothed block 608 meshes with the toothed rod 604 on the rubber slide rod 603, the semi-toothed block 608 causes the rubber slide rod 603 to rise within the track 602. As the semi-toothed block 608 continues to rotate and separates from the toothed rod 604, the rubber slide rod 603 instantly falls and impacts the exhaust panel 612. Upon impact, the telescopic spring 611 causes the exhaust panel 612 to shake, separating impurities from the exhaust panel 612 and preventing poor airflow. Depending on the usage of the range hood, a counterweight can be added to the weighted frame 609 to increase the impact force of the rubber slide rod 603 on the exhaust panel 612, resulting in better cleaning.

[0032] Reference Figure 1 and Figure 2 The outer side of the housing 1 is provided with a lifting assembly 7, and the lifting assembly 7 includes a base plate 705.

[0033] Reference Figure 1 and Figure 2Two round guide rods 704 are fixedly connected to one side of each of the two base plates 705. Two limiting frames 701 are fixedly connected to both sides of the housing 1. The two round guide rods 704 are slidably connected inside the limiting frames 701. Telescopic cylinders 702 are fixedly connected to both sides of each of the two base plates 705. A stop block 703 is fixedly connected to one end of each of the two telescopic cylinders 702. One side of the stop block 703 is fixedly connected to one side of the housing 1. Two universal wheels 706 are fixedly connected to the bottom of each of the two base plates 705.

[0034] In specific application scenarios, when using this range hood, the telescopic cylinder 702 can drive the stop block 703 to make the range hood rise and fall quickly, so that the staff can clean and maintain it. During the rising and falling process, the range hood is guided and limited by the round guide rod 704 to make its movement more stable.

[0035] Reference Figure 5 One of the slices 505 is fixedly connected to a rotating block 509 on one side, and the rotating block 509 and one of the reciprocating push-pull rods 513 are provided with mounting holes 4 on both sides. The interiors of the two opposite mounting holes 4 are connected to a rotating shaft 510 through bearings, and the two rotating shafts 510 are fixedly connected to the same moving rod 511.

[0036] Reference Figure 1 , Figure 3 and Figure 4 Two sliding grooves are provided on one side of the housing 1, and a push-pull slide rod 501 is slidably connected inside the two sliding grooves. One side of the push-pull slide rod 501 is fixedly connected to one side of the ventilation frame 502. The fan body 520 is fixedly connected to one side of the ventilation frame 502 located above. An air inlet is provided at the bottom of the housing 1. An air inlet plate 4 is fixedly connected inside the air inlet. Air inlet holes are provided at equal intervals on one side of the air inlet plate 4. A sealing plate 2 is connected to one side of the housing 1 through a hinge.

[0037] Working principle: During use, when the fan absorbs and purifies the oil fumes, the drive motor 514 can be started. The drive motor 514 drives the rotating disk 515 to rotate. At this time, when the push rod 517 on the rotating disk 515 moves in a circular motion, the push rod 517 drives the moving frame 516 to move horizontally back and forth. This causes the reciprocating push-pull rod 513 to drive one end of one of the slices 505 to move back and forth in an arc shape. This slice 505 drives the remaining slices 505 through the linkage frame 508. Simultaneously, one end moves in an arc shape, allowing the fan to absorb the oil fumes while simultaneously dispersing them through the slicing plate 505. The fumes are then further divided by the guide block 519, ensuring the adsorption frame 518 evenly purifies the oil fumes before discharging them. This avoids directly purifying the absorbed oil fumes, improving the purification effect and ensuring the discharged fumes meet emission standards. However, prolonged discharge of purified oil fumes through the exhaust plate 612 can easily cause blockage. At this point, motor 606 can be started, which drives the half-tooth block 608 on the rotating shaft 607 to rotate. When the toothed end of the half-tooth block 608 meshes with the toothed rod 604 on the rubber slide rod 603, the half-tooth block 608 drives the rubber slide rod 603 to rise within the track 602. When the half-tooth block 608 continues to rotate and separates from the toothed rod 604, the rubber slide rod 603 falls instantly and impacts the air outlet plate 612. When the air outlet plate 612 is impacted, the telescopic spring 611 causes the air outlet plate 612 to sway. The movement of the air outlet plate 612 separates impurities from the air outlet plate, preventing poor air circulation. Depending on the usage of the range hood, a counterweight can be added to the weighted frame 609 to increase the impact force of the rubber slide rod 603 on the air outlet plate 612. At the same time, when using the range hood, the telescopic cylinder 702 can drive the stop block 703 to quickly raise and lower the range hood, making it easier for staff to clean and maintain. During the raising and lowering process, the range hood is guided and limited by the round guide rod 704 to make its movement more stable.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An internal circulation oil fume air purifier, comprising a housing (1), characterized in that, The housing (1) has an installation groove (3) inside, and a slitting adsorption assembly (5) is provided inside the installation groove (3). The slitting adsorption assembly (5) includes a drive motor (514) and a ventilation frame (502). Two ventilation frames (502) are fixedly connected at equal distances to opposite sides with partition rods (503). Each partition rod (503) has an installation hole I on one side. The interior of two opposite installation holes I is connected to a rotating shaft (504) through a bearing. Each rotating shaft (504) has a slitting piece (505) fixedly connected to the outside. One side of two adjacent slitting pieces (505) is fixedly connected to a fixing block (506). Each fixing block (506) has an installation hole II on both sides. The interior of two opposite installation holes II is connected to a rotating shaft (507) through a bearing. The interior of two adjacent rotating shafts (507) is connected to a rotating shaft (507). The same linkage frame (508) is fixedly connected to the outside of the mounting groove (3). Two limiting blocks (512) are fixedly connected to one side of the mounting groove (3), and a through hole is opened on one side of each of the two limiting blocks (512). A reciprocating push-pull rod (513) is slidably connected inside the two through holes. The same moving frame (516) is fixedly connected to the opposite side of the two reciprocating push-pull rods (513). A rotating disk (515) is fixedly connected to the driving end of the drive motor (514), and a pushing rod (517) is fixedly connected to the side of the rotating disk (515) facing the moving frame (516). The pushing rod (517) is located inside the moving frame (516). The same adsorption frame (518) is fixedly connected to the opposite side of the multiple separating rods (503), and a guide block (519) is fixedly connected inside the multiple adsorption ports of the adsorption frame (518).

2. The internal circulation oil fume air purifier according to claim 1, characterized in that, An intermittent impact assembly (6) is provided on one side of the housing (1), and the intermittent impact assembly (6) includes a bracket (601).

3. The internal circulation oil fume air purifier according to claim 2, characterized in that, The bracket (601) has an installation opening on one side, and a track (602) is fixedly connected to one side of the installation opening. A rubber slide rod (603) is slidably connected inside the track (602), and a toothed rod (604) is fixedly connected to one side of the rubber slide rod (603).

4. The internal circulation oil fume air purifier according to claim 3, characterized in that, The bracket (601) has mounting holes three on both sides of the mounting opening, and the two opposite mounting holes three are connected to the same rotating shaft two (607) through bearings. The rotating shaft two (607) is fixedly connected to the outside of a half tooth block (608).

5. The internal circulation oil fume air purifier according to claim 4, characterized in that, The top of the rubber slide bar (603) is fixedly connected to a weighted frame (609), and a slide bar (610) is fixedly connected to one side of the weighted frame (609). A mounting base (605) is fixedly connected to one side of the bracket (601), and a motor (606) is fixedly connected to one side of the mounting base (605). The drive end of the motor (606) is fixedly connected to one end of the rotating shaft (607) via a coupling.

6. The internal circulation oil fume air purifier according to claim 5, characterized in that, An air outlet is provided on one side of the housing (1), and telescopic springs (611) are fixedly connected at equal distances on both sides of the air outlet. The same air outlet plate (612) is fixedly connected to the outside of each telescopic spring (611), and air outlet holes are provided at equal distances on one side of the air outlet plate (612).

7. The internal circulation oil fume air purifier according to claim 6, characterized in that, The outer side of the housing (1) is provided with a lifting assembly (7), and the lifting assembly (7) includes a base plate (705).

8. The internal circulation oil fume air purifier according to claim 7, characterized in that, Two round guide rods (704) are fixedly connected to one side of each of the two base plates (705). Two limiting frames (701) are fixedly connected to both sides of the housing (1). The two round guide rods (704) are slidably connected to the inside of the limiting frames (701). Telescopic cylinders (702) are fixedly connected to both sides of each of the two base plates (705). A stop block (703) is fixedly connected to one end of each of the two telescopic cylinders (702). One side of the stop block (703) is fixedly connected to one side of the housing (1). Two universal wheels (706) are fixedly connected to the bottom of each of the two base plates (705).

9. The internal circulation oil fume air purifier according to claim 8, characterized in that, One of the slices (505) is fixedly connected to a rotating block (509) on one side, and the rotating block (509) and one of the reciprocating push-pull rods (513) are provided with mounting holes four on both sides. The interior of the two opposite mounting holes four is connected to a rotating shaft one (510) through a bearing, and the exterior of the two rotating shafts one (510) is fixedly connected to the same moving rod (511).

10. An internal circulation oil fume air purifier according to claim 9, characterized in that, Two sliding grooves are provided on one side of the housing (1), and a push-pull slide rod (501) is slidably connected inside the two sliding grooves. One side of the push-pull slide rod (501) is fixedly connected to one side of the ventilation frame (502). The fan body (520) is fixedly connected to one side of the ventilation frame (502) located above. An air inlet is provided at the bottom of the housing (1). An air inlet plate (4) is fixedly connected inside the air inlet. Air inlet holes are provided at equal intervals on one side of the air inlet plate (4). A sealing plate (2) is connected to one side of the housing (1) through a hinge.

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