Ventilation cabinet with dustproof structure

Abstract

This utility model discloses a fume hood with a dustproof structure, including a cabinet body. An operation port is opened on the front of the cabinet body, and an operation table is set inside the operation port. The top of the operation table is connected to a ventilation block. Through the design of the inclined groove and ventilation channel on the ventilation block, dust and other impurities can fall into the ventilation channel along the inclined groove and then enter the collection drawer, effectively collecting dust and reducing dust accumulation in the fume hood. The even distribution of multiple ventilation ports on the ventilation block can ensure the uniformity and efficiency of ventilation, allowing better air circulation in the cabinet. Then, the filter screen can filter large particles of dust and other impurities, and the activated carbon plate can adsorb harmful gases and odors in the air. This dual purification ensures the cleanliness of the exhaust air, thereby preventing dust from falling onto the operation table and affecting the normal use of the fume hood.

Description

Technical Field

[0001] This utility model belongs to the field of fume hood technology, specifically a fume hood with a dustproof structure. Background Technology

[0002] Cabinet-type exhaust hoods are similar to sealed hoods. Small parts spray painting cabinets and chemical laboratory fume hoods are typical examples of cabinet-type exhaust hood structures. Large chamber-type fume hoods, with one side completely open, allow operators to work inside. They are mainly used for painting large parts, bagging powders, etc. Their commonly used local exhaust ventilation equipment effectively removes harmful gases generated during experiments, ensuring the safety of personnel.

[0003] A search revealed that Chinese patent application number 202321844565.9 discloses a fume hood with a dustproof structure. This patent includes a fume hood body, a support column fixedly connected to the bottom end of the body, an exhaust pipe fixedly connected to the top of the body, and a dustproof connection mechanism fixedly connected to the front edge of the body. This dustproof connection mechanism includes a fixed guide plate with a fixed guide groove inside. This patent allows for adjustment of the dustproof connection mechanism without using the entire fume hood body, ensuring the mechanism is stably positioned on the front surface of the body. This effectively seals the opening on the front surface of the fume hood, preventing dust from the outside air from entering the inner working surface of the fume hood. The structure is simple and easy to operate.

[0004] Although the aforementioned patent prevents dust from the outside air from entering the surface of the inner working platform of the fume hood, and has a simple structure and is easy to operate, in actual use, as the usage time increases, dust may be adsorbed on the lower surface of the fixed channel and fixed partition through air circulation. This may cause the dust adsorbed on the surface of the fixed channel and fixed partition to fall off due to external factors such as vibration when the fume hood is stationary, which will directly contaminate the working platform inside the fume hood. At this time, the fallen dust may affect the normal use of the fume hood in the future.

[0005] Therefore, the fume hood in the aforementioned patent needs to be modified to effectively prevent dust adsorbed on the surface of the fixed channel and fixed partition when the fume hood body is stationary from falling off due to external factors such as vibration, which would directly contaminate the operating table inside the fume hood and thus affect the normal use of the fume hood. Utility Model Content

[0006] To address the problems mentioned in the background art, the purpose of this utility model is to provide a fume hood with a dustproof structure, which solves the problem that when the fume hood body is stationary, the dust adsorbed on the surface of the fixed channel and fixed partition may fall off due to external reasons such as vibration, directly contaminating the operating table inside the fume hood and thus affecting the normal use of the fume hood.

[0007] This utility model provides the following technical solution: a fume hood with a dustproof structure, comprising a cabinet body, an operating opening on the front of the cabinet body, an operating table inside the operating opening, a ventilation block fixedly connected to the top of the operating table, an inclined groove on the top of the ventilation block, a ventilation groove at the bottom of the inclined groove, a collection frame fixedly connected to the bottom of the ventilation block, and the bottom of the collection frame fixedly connected to the operating table, a collection drawer slidably connected to the inner wall of the collection frame, and the collection drawer communicating with the ventilation groove, and a plurality of ventilation openings evenly distributed in three rows on the surface of the ventilation block. The top of the cabinet is symmetrically fixed with connecting blocks, and the interior of each connecting block is symmetrically provided with sliding grooves. Sliding frames are symmetrically slidably connected inside the two sliding grooves. An activated carbon plate is fixedly connected inside the upper sliding frame, and an elastic frame is fixedly connected to the inner wall of the lower sliding frame. A filter screen is fixedly connected to the inner wall of the elastic frame. The top of the cabinet is provided with an exhaust vent, and a connecting pipe for connecting to an external exhaust device is fixedly connected inside the exhaust vent. The bottom of the connecting pipe extends to the bottom of the exhaust vent and is fixedly connected with a guide block. A transparent sealing door is symmetrically hinged to the front of the operating port.

[0008] The beneficial effects of this utility model are as follows:

[0009] 1. This utility model, through the design of the inclined groove and ventilation channel on the ventilation block, allows dust and other impurities to fall into the ventilation channel along the inclined groove and then into the collection drawer, effectively collecting dust and reducing dust accumulation in the fume hood. The even distribution of multiple ventilation openings on the ventilation block ensures uniform and efficient ventilation, allowing better air circulation inside the cabinet. Then, the filter screen can filter out large particles of dust and other impurities, and the activated carbon plate can adsorb harmful gases and odors in the air. This dual purification ensures the cleanliness of the exhaust air, thereby preventing dust from falling onto the operating table and affecting the normal use of the fume hood.

[0010] 2. This utility model, through the setting of a fixed block, an ejector column, a return spring, a servo motor, a cam, and an impact block, uses the servo motor to drive the cam to rotate, causing the ejector column to reciprocate under the action of the return spring, so that the ejector column collides with the impact block, which can vibrate and clean the filter screen, prevent the filter screen from clogging, and ensure the ventilation effect. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a partial cross-sectional perspective view of the structure of this utility model.

[0013] Figure 3 This is a partial cross-sectional three-dimensional schematic diagram of the ventilation block of this utility model.

[0014] Figure 4 This is a three-dimensional schematic diagram showing the corresponding arrangement of the sliding frame, activated carbon plate, and filter screen in this utility model.

[0015] Figure 5 A three-dimensional schematic diagram showing the corresponding and matching arrangement of the recessed block and the blocking block in this utility model;

[0016] Figure 6 This utility model Figure 2 Enlarged diagram of point A in the middle. Detailed Implementation

[0017] 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.

[0018] like Figures 1 to 6 As shown, the fume hood in this embodiment includes a cabinet body 1. An operating opening 2 is provided on the front of the cabinet body 1. An operating table 3 is provided inside the operating opening 2. A ventilation block 4 is fixedly connected to the top of the operating table 3. An inclined groove is provided on the top of the ventilation block 4, and a ventilation groove is provided at the bottom of the inclined groove. A collection frame 5 is fixedly connected to the bottom of the ventilation block 4, and the bottom of the collection frame 5 is fixedly connected to the operating table 3. A collection drawer 6 is slidably connected to the inner wall of the collection frame 5, and the collection drawer 6 communicates with the ventilation groove. Several ventilation openings 7 are provided on the surface of the ventilation block 4, and the ventilation openings 7 are evenly distributed in three rows. The top of the cabinet body 1 is symmetrical. A connecting block 8 is fixedly connected. The interior of the connecting block 8 is symmetrically provided with sliding grooves. The interior of the two sliding grooves is symmetrically slidably connected with sliding frames 9. An activated carbon plate 10 is fixedly connected inside the upper sliding frame 9. An elastic frame 11 is fixedly connected to the inner wall of the lower sliding frame 9. A filter screen 12 is fixedly connected to the inner wall of the elastic frame 11. An exhaust vent is provided on the top of the cabinet 1. A connecting pipe 13 connected to an external exhaust device is fixedly connected inside the exhaust vent. The bottom of the connecting pipe 13 extends to the bottom of the exhaust vent and is fixedly connected with a guide block 14. A transparent sealing door 15 is symmetrically hinged to the front of the operating port 2.

[0019] refer to Figure 2 and Figure 6A fixing block 16 is fixedly connected to the inner wall of the cabinet 1. A sliding opening is provided on the surface of the fixing block 16. An I-shaped ejector post 17 is slidably connected to the inner wall of the sliding opening. A return spring 18 is slidably connected to the surface of the ejector post 17. A servo motor 19 is fixedly connected to the wall of the inclined groove. A cam 20 is fixedly connected to the output end of the servo motor 19. The cam 20 is slidably connected to the ejector post 17. An impact block 21 is fixedly connected to the bottom of the surface of the filter screen 12. The impact block 21 is correspondingly and cooperates with the ejector post 17.

[0020] In this embodiment, the fixed block 16, the ejector column 17, the return spring 18, the servo motor 19, the cam 20 and the impact block 21 are arranged so that the servo motor 19 drives the cam 20 to rotate, so that the ejector column 17 reciprocates under the action of the return spring 18, and the ejector column 17 collides with the impact block 21, which can vibrate and clean the filter screen 12, prevent the filter screen 12 from being blocked and ensure the ventilation effect.

[0021] refer to Figure 3 The ventilation slot is symmetrically provided with rotating seats and fixed seats on both sides. The two symmetrical rotating seats are rotatably connected by the same rotating shaft 22, which is driven by a stepper motor. The surface of the rotating shaft 22 is provided with three threaded ends. The surface of the threaded ends is threadedly connected with baffles 23, which are correspondingly matched with the ventilation openings 7. The two symmetrical fixed seats are fixedly connected by the same sliding column 24, which is slidably connected to the baffles 23. The surface of the threaded ends 23 is covered with a retractable protective sleeve (not shown).

[0022] This embodiment uses a rotating seat, a fixed seat, a threaded end of a rotating shaft 22, a baffle 23, and a sliding column 24. The rotating shaft 22 is driven to rotate by a stepper motor, causing the baffle 23 to move on the threaded end. This allows for adjustment of the opening and closing degree of the ventilation port 7, thereby controlling the ventilation volume to meet different usage requirements. The sliding column 24 limits the movement of the baffle 23, ensuring its stability. The protective sleeve prevents dust and other impurities from entering the threaded end and affecting its normal operation.

[0023] refer to Figure 2 The inner wall of the connecting pipe 13 is provided with an annular groove, and an ultraviolet irradiation lamp 25 is fixedly connected to the inner wall of the annular groove. A transparent protective shell 26 is fixedly connected to the outer side of the annular groove.

[0024] This embodiment, through the setting of the annular groove and the ultraviolet irradiation lamp 25, can sterilize and disinfect the passing air, further improve the quality of the exhaust air, prevent harmful microorganisms from spreading through the ventilation system, and through the setting of the transparent protective shell 26, can protect the ultraviolet irradiation lamp 25 from damage, while not affecting the irradiation effect of ultraviolet rays.

[0025] refer to Figure 1 and Figure 5The front of the cabinet 1 is symmetrically fixedly connected with recessed blocks 27. The two symmetrical recessed blocks 27 are slidably connected with blocking blocks 28, and the blocking blocks 28 are correspondingly matched with the sliding frame 9. The surface of the recessed blocks 27 is provided with fastening holes 29 and fastening grooves. The fastening grooves are fixedly connected with ejector springs 30. The other end of the ejector springs 30 is fixedly connected with fastening posts 31, and the fastening posts 31 are slidably connected with the fastening grooves and are correspondingly matched with the fastening holes 29.

[0026] In this embodiment, the position of the sliding frame 9 can be restricted by the setting of the recess 27 and the blocking block 28 to prevent it from sliding or falling off during use. With the setting of the fastening hole 29, the fastening groove, the ejection spring 30 and the fastening post 31, the blocking block 28 can be fixed in the recess 27 under the action of the ejection spring 30, ensuring the stability of the blocking block 28, facilitating the installation and disassembly of the sliding frame 9, and making it convenient to replace the activated carbon plate 10 and the filter screen 12.

[0027] refer to Figure 2 The surface of the ventilation block 4 is symmetrically connected to a rotating block, and the surface of the collection drawer 6 is symmetrically fixedly connected to an L-shaped block, with the L-shaped block engaging with the rotating block.

[0028] In this embodiment, the collection drawer 6 can be fixed inside the collection frame 5 by setting the rotating block and the L-shaped block, which prevents the collection drawer 6 from accidentally sliding out during use, and at the same time makes it easy to disassemble the collection drawer 6 for cleaning.

[0029] Place cabinet 1 in a suitable position, connect connecting pipe 13 to external exhaust equipment, and then turn on external exhaust equipment. The exhaust equipment generates suction through connecting pipe 13 and guide block 14, creating negative pressure inside cabinet 1. Outside air enters ventilation block 4 through ventilation opening 7. Ventilation opening 7 is evenly distributed in multiple rows to ensure uniform air intake. After entering ventilation block 4, the air flows upward through ventilation grooves and inclined grooves, allowing it to pass through filter screen 12 to filter out large particles such as dust. Then, the air passes through activated carbon plate 10 to adsorb harmful gases and odors in the air, further purifying the air. The purified air continues to flow upward, flows through exhaust port and guide block 14 into connecting pipe 13, and is discharged from cabinet 1. At this time, ultraviolet irradiation lamp 25 can sterilize and disinfect the passing air, further improving the quality of the exhaust air and preventing harmful microorganisms from spreading through the ventilation system. In addition, the opening degree of ventilation opening 7 can be adjusted according to actual usage needs, and then the stepper motor can be started to drive the rotating shaft 22 to rotate. Because the baffle is threaded to the threaded end, and the sliding pin 24 restricts the rotation of the baffle 23, the baffle 23 will move linearly along the threaded end, thereby adjusting the opening and closing degree of the vent 7 and controlling the ventilation volume. When it is necessary to clean the filter screen 12, the same principle applies as above, requiring the baffle 23 to completely close the vent 7. Then, the servo motor 19 is started, which drives the cam 20 to rotate. The cam 20 pushes the ejector pin 17 to slide within the sliding opening of the fixed block 16 and compress the return spring 18. As the cam 20 continues to rotate, the thrust on the ejector pin 17 decreases, and the return spring 18 returns to its original position, causing the ejector pin to return to its original position. When column 17 slides in the reverse direction, the impact block 21 collides with the ejector column 17, causing the filter screen 12 to vibrate and shake off the dust adsorbed on the filter screen 12, preventing the filter screen 12 from clogging. At the same time, the dust falls into the collection drawer 6 through the inclined groove and ventilation groove for centralized collection. Then, the staff cleans the collection drawer 6 regularly by rotating the rotating block to separate it from the L-shaped block, pulling out the collection drawer 6 to empty the dust, and then reinstalling it. Next, the usage of the activated carbon plate 10 and the filter screen 12 is checked regularly. If replacement is required, press the fastening column 31 to disengage it from the fastening hole 29, pull out the blocking block 28, and take out the sliding frame 9 for replacement.

Claims

1. A fume hood with a dustproof structure, comprising a cabinet body (1), characterized in that: The cabinet (1) has an operating opening (2) on its front. An operating table (3) is located inside the operating opening (2). A ventilation block (4) is fixedly connected to the top of the operating table (3). An inclined groove is formed on the top of the ventilation block (4), and a ventilation groove is formed at the bottom of the inclined groove. A collection frame (5) is fixedly connected to the bottom of the ventilation block (4), and the bottom of the collection frame (5) is fixedly connected to the operating table (3). A collection drawer (6) is slidably connected to the inner wall of the collection frame (5), and the collection drawer (6) communicates with the ventilation groove. Several ventilation openings (7) are formed on the surface of the ventilation block (4), and these ventilation openings (7) are evenly distributed in three rows. The top of the cabinet (1) is symmetrically fixedly connected to... The connecting block (8) has symmetrically opened sliding grooves inside. The two sliding grooves are symmetrically slidably connected to sliding frames (9). The upper sliding frame (9) is fixedly connected to the interior of an activated carbon plate (10). The inner wall of the lower sliding frame (9) is fixedly connected to an elastic frame (11). The inner wall of the elastic frame (11) is fixedly connected to a filter screen (12). The top of the cabinet (1) has an exhaust port. The exhaust port is fixedly connected to a connecting pipe (13) that is connected to an external exhaust device. The bottom of the connecting pipe (13) extends to the bottom of the exhaust port and is fixedly connected to a guide block (14). The front of the operating port (2) is symmetrically hinged with a sealing door (15) made of transparent material.

2. A fume hood with a dustproof structure according to claim 1, characterized in that: The inner wall of the cabinet (1) is fixedly connected to a fixing block (16), the surface of the fixing block (16) is provided with a sliding opening, the inner wall of the sliding opening is slidably connected to an I-shaped ejector column (17), the surface of the ejector column (17) is slidably connected to a return spring (18), the wall of the inclined groove is fixedly connected to a servo motor (19), the output end of the servo motor (19) is fixedly connected to a cam (20), and the cam (20) is slidably connected to the ejector column (17), the bottom of the surface of the filter screen (12) is fixedly connected to an impact block (21), and the impact block (21) is correspondingly and cooperates with the ejector column (17).

3. A fume hood with a dustproof structure according to claim 2, characterized in that: The ventilation slot is symmetrically provided with a rotating seat and a fixed seat on both sides. The two symmetrical rotating seats are rotatably connected by the same rotating shaft (22), and the rotating shaft (22) is driven by a stepper motor. The surface of the rotating shaft (22) is provided with three threaded ends. The surface of the threaded ends is threadedly connected with a baffle (23), and the baffle is correspondingly matched with the ventilation port (7). The two symmetrical fixed seats are fixedly connected by the same sliding column (24), and the sliding column (24) is slidably connected to the baffle (23).

4. A fume hood with a dustproof structure according to claim 3, characterized in that: The inner wall of the connecting pipe (13) is provided with an annular groove, and an ultraviolet irradiation lamp (25) is fixedly connected to the inner wall of the annular groove. A transparent protective shell (26) is fixedly connected to the outer side of the annular groove.

5. A fume hood with a dustproof structure according to claim 4, characterized in that: The cabinet (1) has symmetrically fixedly connected recesses (27) on its front side. The two symmetrical recesses (27) are slidably connected to a blocking block (28), and the blocking block (28) is correspondingly matched with the sliding frame (9). The surface of the recesses (27) is provided with a fastening hole (29) and a fastening groove. The fastening groove is fixedly connected to an ejector spring (30), and the other end of the ejector spring (30) is fixedly connected to a fastening post (31). The fastening post (31) is slidably connected to the fastening groove and is correspondingly matched with the fastening hole (29).

6. A fume hood with a dustproof structure according to claim 5, characterized in that: The surface of the ventilation block (4) is symmetrically rotatably connected to a rotating block, and the surface of the collection drawer (6) is symmetrically fixedly connected to an L-shaped block, and the L-shaped block is engaged with the rotating block.

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