Hundred-grade exhaust cabinet with self-cleaning function

Abstract

The invention relates to the technical field of hundred-grade exhaust cabinets, and discloses a hundred-grade exhaust cabinet with a self-cleaning function, which comprises a cabinet body, an operation table is fixedly connected to the top of the cabinet body, a transparent window is slidably connected to the outer wall of the operation table, a ventilation part is fixedly connected to the top of the operation table, and the operation table is communicated with the interior of the ventilation part. A dustproof box is fixedly connected to the bottom of the top end of the operation table, an auxiliary dustproof mechanism is arranged at the bottom of the dustproof box, a filter screen plate is slidably connected to the interior of the dustproof box, an auxiliary clearing mechanism is arranged at the top of the filter screen plate, and the auxiliary dustproof mechanism is used for sealing the dustproof box when the transparent window of the operation table is opened; when the interior of the operation table is in an open state, external pollutants cannot enter the ventilation component through the opening in the bottom of the dustproof box, the high-efficiency filter is prevented from being additionally polluted in the non-working period, and the service life of the high-efficiency filter is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of 100-class exhaust cabinets, and in particular to a 100-class exhaust cabinet with a self-cleaning function. Background Art

[0002] Class 100 exhaust cabinets are usually equipped with high-efficiency air filters (HEPA). The filtering principle of HEPA filters is based on interception, inertial collision and diffusion. Its filter material is composed of very fine fibers with extremely small gaps between these fibers. When air flows through the filter, some particles with a particle size greater than or equal to 0.3μm will be directly intercepted by the fibers. When the airflow changes direction, some particles with inertia continue to move in the original direction due to inertia and hit the fibers and are captured. Some extremely small particles will contact the fibers under the action of Brownian motion and be adsorbed. In this way, the HEPA filter can remove more than 99.97% of particles with a particle size of 0.3μm and larger in the air, thereby achieving preliminary purification of the air.

[0003] Before using the Class 100 exhaust cabinet, the window on the side of the operating table needs to be opened to facilitate the placement of experimental items. Since the operating table is internally connected to the ventilation component equipped with a high-efficiency air filter, external air will enter during the placement of experimental items and circulate between the operating table and the ventilation component, causing dust particles, microorganisms and other pollutants in the external environment to enter. External pollutants are more likely to come into contact with the high-efficiency air filter, thereby accelerating the contamination of the high-efficiency air filter and shortening its service life. At the same time, it absorbs a large amount of external dust. The filtration efficiency will be reduced when it is used next time, and the filter will need to be replaced more frequently, increasing the cost of use. Summary of the invention

[0004] The object of the present invention is to provide a Class 100 exhaust cabinet with a self-cleaning function to solve the problem proposed in the above background technology that before the Class 100 exhaust cabinet is used, its window located on the side of the operating table needs to be opened to facilitate the placement of experimental items. Since the operating table is connected to the inside of the ventilation component equipped with a high-efficiency air filter, during the placement of the experimental items, external air will enter and circulate between the operating table and the ventilation component, thereby causing pollutants such as dust particles and microorganisms in the external environment to enter, and the external pollutants are more likely to contact the high-efficiency air filter, thereby accelerating the pollution of the high-efficiency air filter and shortening its service life. At the same time, a large amount of external dust is adsorbed, and its filtration efficiency will be reduced when it is used next time, so the filter needs to be replaced more frequently, increasing the cost of use.

[0005] To achieve the above-mentioned purpose, a Class 100 exhaust cabinet with a self-cleaning function is provided, including a cabinet body, an operating table fixedly connected to the top of the cabinet body, a transparent window slidably connected to the outer wall of the operating table, a ventilation component fixedly connected to the top of the operating table, the operating table is connected to the inside of the ventilation component, a dust box is fixedly connected to the bottom of the top of the operating table, an auxiliary dust-proof mechanism is arranged at the bottom of the dust box, a filter screen is slidably connected to the inside of the dust box, an auxiliary cleaning mechanism is arranged on the top of the filter screen, the auxiliary dust-proof mechanism is used for closing the dust box when the transparent window is open, and synchronously opening the dust box when the transparent window is pulled down, so that the operating table and the ventilation component are connected again, and the auxiliary cleaning mechanism is used for filtering the wind entering the inside of the ventilation component by using the filter screen when the dust box is open, so as to maintain the ventilation performance of the filter screen while clearing the filter screen.

[0006] As a further improvement of the present technical solution, the auxiliary dustproof mechanism includes a dustproof cover plate symmetrically hinged to the inner wall of the bottom of the dustproof box, support frames are symmetrically fixedly connected on both sides of the bottom of the dustproof box, the tops of the two support frames are fixedly connected to guide rods, the outer walls of the guide rods are slidably connected to lifting blocks, the outer walls of the two support frames are slidably connected to control rods, the outer walls of the two control rods are fixedly connected to rectangular blocks close to the outer walls of the support frames, the outer walls of the rectangular blocks are fixedly connected to a first support spring, and the outer wall of the first support spring away from the rectangular block is fixedly connected to the outer wall of the support frame.

[0007] As a further improvement of the technical solution, the top contour of the control rod near the guide rod is a triangular protrusion, the protrusion of the control rod is slidingly matched with the bottom end of the lifting block, the contour shape of the end of the control rod away from the protrusion is set to an arc, and the arc end of the control rod is in contact with the outer wall of the top of the transparent window.

[0008] As a further improvement of the technical solution, the lifting block is located directly below the joint between the two dust cover plates, and the outline shape of the lifting block is an isosceles triangle.

[0009] As a further improvement of the technical solution, two rectangular grooves are symmetrically provided on the inner wall at the bottom of the dustproof box, and a dust collecting box is inserted into the bottom of the dustproof box and directly below the rectangular grooves, and the dust collecting box is movable and detachable.

[0010] As a further improvement of the present technical solution, a plurality of short cylinders are symmetrically and evenly fixedly connected on the inner wall of the dustproof box near the top, and the side frames of the filter screen are slidably connected to the outer walls of the plurality of short cylinders respectively. A second support spring is sleeved on the short cylinder, and the top of the second support spring is fixedly connected to the bottom of the top end of the short cylinder, and the second support spring is fixedly connected to the top of the filter screen.

[0011] As a further improvement of the technical solution, the outline shape of the filter screen plate is arc-shaped and is high in the middle and low on both sides, and an air guide plate is fixedly connected to the bottom of the filter screen plate.

[0012] As a further improvement of the technical solution, the filter screen plates are located on the inner walls of both sides of the air guide plate and are arranged as exhaust channels, and the air guide plate is low in the middle and high on both sides.

[0013] As a further improvement of the present technical solution, the auxiliary cleaning mechanism includes a supporting cross bar fixedly connected to the top side wall of the dust box, the inner wall of the supporting cross bar is rotatably connected with a non-powered fan blade, the top of the filter plate is symmetrically fixedly connected with two C-shaped support rods, the C-shaped support rod is located below the bottom of the supporting cross bar, the top bottom of the C-shaped support rod is fixedly connected with a first protrusion, the bottom end of the non-powered fan blade passes through the inner wall of the supporting cross bar and is fixedly connected with a fixed base, the fixed base is located between the two C-shaped support rods, and the top of the fixed base and away from the rotation center of the non-powered fan blade is fixedly connected with a second protrusion.

[0014] As a further improvement of the technical solution, the unpowered fan blades rotate in coordination with the wind generated by the ventilation component, and the unpowered fan blades carry the fixed base and the second protrusion and push the first protrusion upward once every rotation.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting up an auxiliary dustproof mechanism, in the initial state, the dustproof cover is in a horizontal state. At this time, the dustproof box is in a closed state under the blocking effect of the dustproof cover, thereby ensuring that the inside of the operating table is in an open state, and external pollutants will not enter the ventilation component through the bottom opening of the dustproof box, avoiding additional pollution of the high-efficiency filter during non-working period, and extending the service life of the high-efficiency filter. When the transparent window is pulled down and the equipment is ready to operate, the two dustproof covers will be synchronously flipped upward under the lifting effect of the lifting block and opened to the maximum gap, so that the operating table is connected with the dustproof box and the inside of the ventilation component, so that when the equipment is running, the ventilation component can cooperate with the high-efficiency filter installed inside to work normally, ensuring that the air that needs to be purified inside the operating table will be discharged, and at the same time, the filtering performance of the high-efficiency filter is conducive to improving the self-purification effect of the equipment, making the equipment filtering more thorough.

[0017] 2. By setting up an auxiliary cleaning mechanism and utilizing the operation of the ventilation component to generate upward wind, the unpowered fan blade rotates with the fixed base and the second protrusion under the wind. The second protrusion will conflict with the first protrusion every time it rotates one circle, so that the C-shaped support rod moves the filter screen upward under the push of the second protrusion, and cooperates with the squeezing and rebounding effect of the second supporting spring, so that the filter screen plate can vibrate up and down rhythmically under the drive of energy-free power, so that the impurities and pollutants intercepted by the filter screen plate after the air to be purified enters the dustproof box are shaken off, thereby avoiding the impurities and pollutants clogging the fine mesh of the exhaust channel of the filter screen plate, improving the passability of the exhaust channel of the filter screen plate, and the posture of the filter screen plate being high in the middle and low at both ends is conducive to improving the filtering effect of the filter screen plate, so that the impurities and pollutants located on the bottom slope of the exhaust channel of the filter screen plate can fall off, and at the same time, the vibration effect generated by the filter screen plate does not require energy consumption to drive, making the equipment more energy-efficient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the components related to the operating table of the present invention;

[0020] Figure 3 It is a sectional view of the three-dimensional structure of the operating table of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the auxiliary dust-proof mechanism of the present invention;

[0022] Figure 5 It is a schematic diagram of the side view of the three-dimensional structure of the dustproof box related parts of the present invention;

[0023] Figure 6 It is a front cross-sectional view of the auxiliary dust prevention mechanism of the present invention;

[0024] Figure 7 It is a sectional view of the three-dimensional structure of the dustproof box of the present invention;

[0025] Figure 8 It is a sectional view of the three-dimensional structure of the filter screen plate related parts of the present invention;

[0026] Fig. 9 It is a sectional view of the three-dimensional structure of the auxiliary cleaning mechanism of the present invention;

[0027] Fig.10 For the present invention Fig. 9 Enlarged schematic diagram of the three-dimensional structure at A in the middle.

[0028] The meaning of each number in the figure is:

[0029] 1. Cabinet; 2. Operation table; 21. Transparent window; 22. Dustproof box; 3. Ventilation components;

[0030] 4. Auxiliary dustproof mechanism; 41. Dustproof cover plate; 42. Support frame; 43. Guide rod; 44. Lifting block; 45. Control rod; 46. Rectangular block; 47. First support spring;

[0031] 51. rectangular groove; 52. dust collecting box; 61. short cylinder; 62. filter screen; 63. second supporting spring; 64. air guide plate;

[0032] 7. Auxiliary cleaning mechanism; 71. Support cross bar; 72. Unpowered fan blade; 73. C-shaped support rod; 74. First protrusion; 75. Fixed base; 76. Second protrusion. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] Example 1

[0036] See also Figure 1-Figure 10As shown, the purpose of this embodiment is to provide a 100-level exhaust cabinet with a self-cleaning function, including a cabinet body 1, an operating table 2 is fixedly connected to the top of the cabinet body 1, a transparent window 21 is slidably connected to the outer wall of the operating table 2, a ventilation component 3 is fixedly connected to the top of the operating table 2, the operating table 2 is connected to the inside of the ventilation component 3, a dust box 22 is fixedly connected to the bottom of the top of the operating table 2, an auxiliary dust-proof mechanism 4 is arranged at the bottom of the dust box 22, a filter screen plate 62 is slidably connected to the inside of the dust box 22, and an auxiliary cleaning mechanism 7 is arranged on the top of the filter screen plate 62, the auxiliary dust-proof mechanism 4 is used for the operating table 2 to close the dust box 22 when the transparent window 21 is opened, and at the same time, when the transparent window 21 is pulled down, the dust box 22 is opened synchronously to reconnect the operating table 2 with the ventilation component 3, and the auxiliary cleaning mechanism 7 is used for filtering the wind entering the inside of the ventilation component 3 by using the filter screen plate 62 when the dust box 22 is opened, and maintaining the ventilation performance of the filter screen plate 62 while dredging the filter screen plate 62;

[0037] The auxiliary dustproof mechanism 4 includes a dustproof cover plate 41 symmetrically hinged to the inner wall of the bottom of the dustproof box 22, support frames 42 are symmetrically fixedly connected on both sides of the bottom of the dustproof box 22, guide rods 43 are fixedly connected to the tops of the two support frames 42, and lifting blocks 44 are slidably connected to the outer walls of the guide rods 43. The outer walls of the two support frames 42 are slidably connected to control rods 45, and the outer walls of the two control rods 45 close to the support frames 42 are fixedly connected to rectangular blocks 46, and the outer walls of the rectangular blocks 46 are fixedly connected to the first support springs 47, and the outer wall of the first support springs 47 away from the rectangular blocks 46 is fixedly connected to the outer walls of the support frames 42;

[0038] The transparent window 21 is used to resist the control rod 45, so that the control rod 45 always squeezes the first supporting spring 47, so that the raised end of the control rod 45 is separated from the lifting block 44. When the lifting block 44 is not lifted by the control rod 45, it will remain stationary on the outer wall of the guide rod 43 under the action of its own gravity, and its top outer wall will not contact the bottom of the two dust cover plates 41. At this time, the two dust cover plates 41 are in a horizontal state. In addition, the two dust cover plates 41 are both located on the top of the support frame 42. The support frame 42 can be used to support and limit the two dust cover plates 41, so that the two dust cover plates 41 can only be flipped upwards, which improves The stability during flipping ensures that when the transparent window 21 is opened, external pollutants will not enter the interior of the ventilation component 3 through the bottom opening of the dustproof box 22, thereby preventing the high-efficiency filter from being additionally contaminated when not in operation, which helps to extend the service life of the high-efficiency filter. At the same time, when the transparent window 21 is pulled down, the two dustproof covers 41 will be flipped upwards synchronously and opened to the maximum gap, so that the operating table 2 is connected with the dustproof box 22 and the interior of the ventilation component 3, which can facilitate the normal operation of the ventilation component 3 in conjunction with the high-efficiency filter installed therein when the equipment is in operation. Utilizing the filtering performance of the high-efficiency filter is beneficial to improving the self-cleaning effect of the equipment.

[0039] The top contour of the end of the control rod 45 close to the guide rod 43 is a triangular protrusion, the protrusion of the control rod 45 is slidably matched with the bottom end of the lifting block 44, the contour shape of the end of the control rod 45 away from the protrusion is set to be an arc, the arc-shaped end of the control rod 45 is in contact with the outer wall of the top of the transparent window 21, the lifting block 44 is located directly below the seam between the two dust cover plates 41, and the contour shape of the lifting block 44 is an isosceles triangle;

[0040] The inner wall at the bottom of the dust box 22 is also symmetrically provided with two rectangular grooves 51, and a dust box 52 is inserted at the bottom of the dust box 22 and located directly below the rectangular groove 51. The dust box 52 is movably and detachably arranged, and a plurality of short cylinders 61 are symmetrically and evenly fixedly connected to the inner wall near the top of the dust box 22, and the two side frames of the filter screen plate 62 are respectively slidably connected to the outer walls of the plurality of short cylinders 61, and a second supporting spring 63 is sleeved on the short cylinder 61, and the top of the second supporting spring 63 is fixedly connected to the bottom of the top of the short cylinder 61, and the second supporting spring 63 is fixedly connected to the top of the filter screen plate 62, and the contour shape of the filter screen plate 62 is arc-shaped and is high in the middle and low on both sides. An air guide plate 64 is fixedly connected to the bottom of the filter screen plate 62, and the inner walls of the filter screen plate 62 on both sides of the air guide plate 64 are arranged as exhaust channels, and the air guide plate 64 is low in the middle and high on both sides.

[0041] The auxiliary cleaning mechanism 7 includes a supporting cross bar 71 fixedly connected to the top side wall of the dustproof box 22, and the inner wall of the supporting cross bar 71 is rotatably connected to the unpowered fan blade 72. Two C-shaped support rods 73 are symmetrically fixedly connected to the top of the filter screen plate 62, and the C-shaped support rod 73 is located below the bottom of the supporting cross bar 71. The top bottom of the C-shaped support rod 73 is fixedly connected to a first protrusion 74. The bottom end of the unpowered fan blade 72 passes through the inner wall of the supporting cross bar 71 and is fixedly connected to a fixed base 75. The fixed base 75 is located between the two C-shaped support rods 73. A second protrusion 76 is fixedly connected to the top of the fixed base 75 and away from the rotation center of the unpowered fan blade 72. The unpowered fan blade 72 rotates with the wind generated by the ventilation component 3, and the unpowered fan blade 72, with the fixed base 75 and the second protrusion 76, pushes the first protrusion 74 upward once every rotation.

[0042] When working:

[0043] Before the equipment is used, the transparent window 21 is located at the top of the operating table 2. At this time, the operating table 2 is in an open state, which is convenient for the operator to put in experimental items. At the same time, before the transparent window 21 is pulled down, the symmetrically arranged dust covers 41 are all in a horizontal state, so that the two dust covers 41 can be used to close the bottom opening of the dust box 22, so that the inside of the dust box 22 maintains a relatively sealed environment, ensuring that when the inside of the operating table 2 is in an open state, external pollutants will not enter the ventilation component 3 through the bottom opening of the dust box 22, thereby avoiding additional contamination of the high-efficiency filter when it is not working, which helps to extend the service life of the high-efficiency filter installed in the ventilation component 3. After the experimental object is placed in the operating table 2, the transparent window 21 is immediately pulled down. In the initial state, the end of the control rod 45 close to the transparent window 21 is in conflict with the outer wall of the top of the transparent window 21, and the first support spring 47 is in a compressed state. As the transparent window 21 moves downward, the outer wall of the top of the transparent window 21 is separated from the arc-shaped end of the control rod 45, so that the arc-shaped end of the control rod 45 is not restricted by the transparent window 21. Under the rebound action of the first support spring 47, the control rod 45 moves from the outer wall of the support frame 42 to the transparent window. 21, since the top contour shape of the end of the control rod 45 away from the transparent window 21 is set to be convex, the convex part will gradually contact the outer wall of the bottom end of the lifting block 44 during the sliding process of the control rod 45, and the outer walls on both sides of the bottom end of the lifting block 44 are set to be arc-shaped, so as to facilitate the contact between the bottom end of the lifting block 44 and the convex end of the control rod 45, so that the lifting block 44 will slide from low to high along the contour of the convex end of the control rod 45, resulting in the lifting block 44 being lifted by the convex end of the control rod 45 and gradually sliding upward on the outer wall of the guide rod 43. Since the outer contour of the lifting block 44 is an isosceles triangle, when the lifting block 44 rises, its top will first be inserted into the gap between the two dust cover plates 41, so that the outer walls on both sides of the top of the lifting block 44 can better fit with the outer walls of the frame of the two dust cover plates 41. At this time, the dust cover plates 41 will flip toward the inside of the dust box 22 under the lifting action of the lifting block 44. When the highest point of the raised end of the control rod 45 is located at the bottom of the lifting block 44, the lifting block 44 completely lifts the dust cover plates 41 to a suitable height, and the gap between the two dust cover plates 41 is opened and closed to the maximum, which can facilitate the normal operation of the ventilation component 3 in conjunction with the high-efficiency filter installed therein when the equipment is in operation. Utilizing the filtering performance of the high-efficiency filter is beneficial to improving the self-cleaning effect of the equipment.

[0044] When the experimental object completes the experiment, the transparent window 21 needs to be lifted up again. As the transparent window 21 is reset, the top of the transparent window 21 will contact the arc end of the control rod 45 again and push it, so that the control rod 45 will cooperate with the rectangular block 46 and the support frame 42 to squeeze the first support spring 47. At the same time, the control rod 45 will slide in the direction away from the transparent window 21, and the raised end of the control rod 45 will separate from the contact with the bottom end of the lifting block 44. When the dust cover 41 and the lifting block 44 are not lifted by the raised end of the control rod 45, under the action of their own gravity, the lifting block 44 and the dust cover 41 will reset at the same time, so that the dust cover 41 will close the bottom of the dust box 22 again, which is convenient for the next use and effectively prevents external pollutants from entering the dust box 22.

[0045] When the two dust cover plates 41 are flipped upward at the same time, the gap between the two dust cover plates 41 is located below the middle of the air guide plate 64. With the operation of the ventilation component 3, the wind generated by the ventilation component 3 will suck the air that needs to be purified inside the operating table 2 into the dust box 22 through the gap between the two dust cover plates 41. By setting the air guide plate 64, the air that needs to be purified will be guided to the exhaust channels on both sides of the filter screen plate 62 through the air guide plate 64. Since the lower surface of the air guide plate 64 is smooth, it is conducive to the air that needs to be purified to flow on its lower surface, and prevents excessive adhesion of impurities and pollutants to the lower surface of the air guide plate 64. At the same time, the air guide plate 64 is low in the middle and high on both sides, so that the air that needs to be purified will be changed in flow direction when it flows under the air guide plate 64, so that the impurities and pollutants mixed in the air that needs to be purified change their movement trajectory, and then cooperate with the filter screen plate 62 to accelerate the separation of the air that needs to be purified from the impurities and pollutants, and achieve a better interception and filtering effect.

[0046] The wind generated by the operation of the ventilation component 3 drives the unpowered fan blade 72 to rotate, so that the unpowered fan blade 72 rotates with the fixed base 75 and the second protrusion 76. Since the second protrusion 76 is in conflict with the first protrusion 74, and there is a movable space between the upper and lower ends of the C-shaped support rod 73 and the fixed base 75, the second protrusion 76 will conflict with the first protrusion 74 every time the fixed base 75 rotates one circle, so that the second protrusion 76 generates an upward pushing force on the first protrusion 74, thereby achieving the purpose of lifting the C-shaped support rod 73. The filter screen plate 62 is lifted by the C-shaped support rod 73, causing the filter screen plate 62 to slide upward on the outer wall of the short cylinder 61 and squeeze the second support spring 63 at the same time. Block 76 is separated from the first protrusion 74, at which time the C-shaped support rod 73 and the filter plate 62 are reset by cooperating with the rebound action of the second support spring 63, and the above process is repeated, so that the filter plate 62 can produce a rhythmic up and down vibration effect under the drive of energy-free power, so that the impurities and pollutants intercepted by the exhaust channels on both sides of the filter plate 62 will be shaken off, thereby avoiding the impurities and pollutants from clogging the exhaust channels of the filter plate 62, and the posture of the filter plate 62 being high in the middle and low at both ends is conducive to improving the filtering effect of the exhaust channels of the filter plate 62, so that the impurities and pollutants located on the bottom slope of the exhaust channels of the filter plate 62 can fall off, and at the same time, the vibration effect produced by the filter plate 62 does not need to consume energy to drive, making the equipment more energy-efficient to use.

[0047] By providing the rectangular groove 51, the impurities and pollutants falling from the bottom of the filter plate 62 can enter the dust box 52, and the dust box 52 is detachable, so that the operator can remove the dust box 52 regularly and clean the impurities and pollutants collected therein, so as to achieve recycling and help keep the inside of the dust box 22 clean, solving the problem of impurities and pollutants being intercepted but not collected.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A 100-level exhaust cabinet with a self-cleaning function, comprising a cabinet body (1), an operating table (2) fixedly connected to the top of the cabinet body (1), a transparent window (21) slidably connected to the outer wall of the operating table (2), a ventilation component (3) fixedly connected to the top of the operating table (2), the operating table (2) and the ventilation component (3) are internally connected, characterized in that: The bottom of the top of the operating table (2) is fixedly connected to a dust box (22), the bottom of the dust box (22) is provided with an auxiliary dust prevention mechanism (4), the inside of the dust box (22) is slidably connected to a filter screen plate (62), the top of the filter screen plate (62) is provided with an auxiliary cleaning mechanism (7), the auxiliary dust prevention mechanism (4) is used for closing the dust box (22) when the operating table (2) is in an open state with a transparent window (21), and simultaneously opening the dust box (22) when the transparent window (21) is pulled down, so that the operating table (2) and the ventilation component (3) are connected again, and the auxiliary cleaning mechanism (7) is used for filtering the wind entering the interior of the ventilation component (3) by using the filter screen plate (62) when the dust box (22) is in an open state, and maintaining the ventilation performance of the filter screen plate (62) while clearing the filter screen plate (62).

2. A Class 100 exhaust cabinet with self-cleaning function according to claim 1, characterized in that: The auxiliary dustproof mechanism (4) comprises a dustproof cover plate (41) symmetrically hinged to the inner wall of the bottom of the dustproof box (22); the bottom of the dustproof box (22) is symmetrically fixedly connected with support frames (42) on both sides; the tops of the two support frames (42) are fixedly connected with guide rods (43); the outer walls of the guide rods (43) are slidably connected with lifting blocks (44); the outer walls of the two support frames (42) are slidably connected with control rods (45); the outer walls of the two control rods (45) are fixedly connected with rectangular blocks (46) on one side close to the support frames (42); the outer walls of the rectangular blocks (46) are fixedly connected with a first support spring (47); the outer wall of the first support spring (47) away from the rectangular block (46) is fixedly connected to the outer wall of the support frame (42).

3. A Class 100 exhaust cabinet with self-cleaning function according to claim 2, characterized in that: The top contour of one end of the control rod (45) close to the guide rod (43) is a triangular protrusion, the protrusion of the control rod (45) is slidably matched with the bottom end of the lifting block (44), the contour shape of the end of the control rod (45) away from the protrusion is set to be an arc, and the arc-shaped end of the control rod (45) is in contact with the outer wall of the top end of the transparent window (21).

4. The 100-level exhaust cabinet with self-cleaning function according to claim 2 is characterized in that: The lifting block (44) is located directly below the joint between the two dust cover plates (41), and the outline shape of the lifting block (44) is an isosceles triangle.

5. The 100-level exhaust cabinet with self-cleaning function according to claim 1 is characterized in that: The inner wall at the bottom of the dustproof box (22) is also symmetrically provided with two rectangular grooves (51); a dust collecting box (52) is inserted at the bottom of the dustproof box (22) and directly below the rectangular grooves (51); the dust collecting box (52) is movably and detachably arranged.

6. The 100-level exhaust cabinet with self-cleaning function according to claim 1 is characterized in that: A plurality of short cylinders (61) are fixedly connected symmetrically and evenly on the inner side wall of the dustproof box (22) near the top, and the side frames of the filter screen (62) are respectively slidably connected to the outer walls of the plurality of short cylinders (61). A second supporting spring (63) is sleeved on the short cylinder (61), and the top of the second supporting spring (63) is fixedly connected to the bottom of the top of the short cylinder (61), and the second supporting spring (63) is fixedly connected to the top of the filter screen (62).

7. The 100-level exhaust cabinet with self-cleaning function according to claim 6, characterized in that: The filter screen plate (62) has an arc-shaped contour and is high in the middle and low on both sides. The bottom of the filter screen plate (62) is fixedly connected to an air guide plate (64).

8. The 100-level exhaust cabinet with self-cleaning function according to claim 7, characterized in that: The filter screen plate (62) is located on the inner walls of both sides of the air guide plate (64) and is arranged as an exhaust channel. The air guide plate (64) is low in the middle and high on both sides.

9. The 100-level exhaust cabinet with self-cleaning function according to claim 1, characterized in that: The auxiliary cleaning mechanism (7) comprises a supporting cross bar (71) fixedly connected to the top side wall of the dustproof box (22); the inner wall of the supporting cross bar (71) is rotatably connected to a non-powered fan blade (72); the top of the filter screen plate (62) is symmetrically fixedly connected to two C-shaped support rods (73); the C-shaped support rods (73) are located below the bottom of the supporting cross bar (71); the top bottom of the C-shaped support rod (73) is fixedly connected to a first protrusion (74); the bottom end of the non-powered fan blade (72) passes through the inner wall of the supporting cross bar (71) and is fixedly connected to a fixed base (75); the fixed base (75) is located between the two C-shaped support rods (73); the top of the fixed base (75) and the side away from the rotation center of the non-powered fan blade (72) is fixedly connected to a second protrusion (76).

10. A Class 100 exhaust cabinet with self-cleaning function according to claim 9, characterized in that: The unpowered fan blade (72) rotates in coordination with the wind generated by the ventilation component (3), and the unpowered fan blade (72) with the fixed base (75) and the second protrusion (76) pushes the first protrusion (74) upward once every rotation.

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