Air supplement type experimental ventilation cabinet

Abstract

The utility model discloses an air supplement type experimental ventilation cabinet, which belongs to the technical field of ventilation cabinet equipment and comprises a cabinet body, an operation table is arranged in the cabinet body, air supplement grids are arranged on two sides of the operation table, a fan is arranged at the bottom of each air supplement grid, an exhaust pipe is arranged at the top of the cabinet body, and a ventilation filter component is arranged on the surface of one side of the cabinet body. According to the utility model, the ventilation filtering assembly is arranged, so that the air supply effect of the fan in operation is ensured, the air supply quality is improved, harmful gas generated in an experiment is further ensured to be exhausted upwards in time under the action of the fan, the harm of the harmful gas to experimenters is avoided, and the experiment efficiency is improved. The safety performance of the air supplement type experimental fume hood is improved, by arranging the gas purification assembly, the practicability of the assembly is improved, it is guaranteed that exhausted gas cannot pollute the environment, and development of the environmental protection career is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of fume hood equipment, and in particular relates to an air-supplementing experimental fume hood. Background Art

[0002] Fume hoods are essential laboratory safety devices, primarily used to exhaust various indoor exhaust gases. Experimental operations can produce a variety of harmful gases, odors, moisture, and flammable, explosive, and corrosive substances. To protect user safety and prevent contaminants from spreading into the laboratory, fume hoods should be used near pollution sources.

[0003] Chinese patent application No. 202223561357.6 discloses an air-supplementing experimental fume hood, which includes: a cabinet body, an operating table, an exhaust duct, and a fan. The exhaust duct is arranged on the top of the cabinet body; an operating table is arranged in the cabinet body, and a fan is arranged in the operating table. The fans are located on both sides of the operating table. An air-supplementing grille is arranged on the surface of the operating table. The air-supplementing grille corresponds to the fan. A plurality of fans are arranged on one side of the operating table and the plurality of fans are arranged at intervals along the depth direction of the operating table; a retaining rib is arranged on the operating table, the retaining rib protrudes from the surface of the operating table, and the air-supplementing grille is located on the side of the retaining rib close to the end of the operating table. The fan arranged in the operating table provides an air supply airflow to the inside of the cabinet body to push the exhaust gas generated above the operating table to be transported upward. The retaining rib is arranged on the operating table to prevent spilled liquid from flowing through the air-supplementing grille into the fan, thereby ensuring the working stability of the fan, thereby improving the air supply to the exhaust gas generated on the operating table and realizing multi-dimensional air supply in the fume hood.

[0004] The above-mentioned patent has the following problems when used:

[0005] 1. There is no ventilation hole at the bottom of the chamber of the air-supplementing experimental fume hood, which cannot guarantee the air supply effect and quality of the fan, resulting in the inability to discharge harmful gases generated in the experiment in time, endangering the health of the operators.

[0006] 2. The exhaust duct of the air-supplementing experimental fume hood is not equipped with a gas purification component. The direct discharge of harmful gases will pollute the environment and is not conducive to the development of environmental protection. Utility Model Content

[0007] In order to solve the problems raised in the above background technology, the utility model provides an air supply type laboratory fume hood, which has the characteristics of good fan air supply effect and pollution-free exhaust gas.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an air-supplementing experimental fume hood, comprising a cabinet body, an operating table is arranged inside the cabinet body, air-supplementing grilles are arranged on both sides of the operating table, a fan is arranged at the bottom of the air-supplementing grilles, an exhaust duct is arranged on the top of the cabinet body, a ventilation filter assembly is arranged on one side surface of the cabinet body, and a gas purification assembly is arranged inside the exhaust duct.

[0009] Preferably, the ventilation and filtering assembly includes a door panel, a non-woven drying mesh, a glass fiber filter paper mesh, a fixing block, a steel wire nylon mesh, an air inlet, an air intake fan, an air inlet duct, an air outlet, a ventilation shell and a sealing block, wherein a ventilation shell is provided on one side surface of the cabinet, a door panel is provided on one side of the ventilation shell, an air inlet is provided on the bottom of the door panel, an air intake fan is provided inside the ventilation shell, a steel wire nylon mesh is provided on the top of the air intake fan, a glass fiber filter paper mesh is provided on the top of the steel wire nylon mesh, a fixing block is provided on one side of the glass fiber filter paper mesh, a sealing block is provided on the other side of the glass fiber filter paper mesh, a non-woven drying mesh is provided on the side of the glass fiber filter paper mesh away from the steel wire nylon mesh, an air inlet duct is provided on the top of the non-woven drying mesh, and an air outlet is provided on the top of the air inlet duct.

[0010] Preferably, a handle is provided on the surface of the door panel, and a rotating shaft is provided at the connection between the bottom of the door panel and the ventilation shell.

[0011] Preferably, the gas purification component includes a shell door, a limit block, an air equalizing plate, a sealing strip, an activated carbon layer, a liquid purification component and a orifice plate, wherein a shell door is provided on one side surface of the exhaust pipe, a limit block is provided on one side surface of the shell door, an air equalizing plate is provided on one side of the limit block, an activated carbon layer is provided on the top of the air equalizing plate, a sealing strip is provided on one side of the air equalizing plate, an orifice plate is provided at the output end of the exhaust pipe, and a liquid purification component is provided on one side of the orifice plate.

[0012] Preferably, the liquid purification component includes an air duct, a liquid box, a cross bar, a drive motor, a drain port, a float, a liquid inlet pipe and a connecting rod, wherein an air duct is provided inside the exhaust duct, a liquid box is provided on one side of the air duct, a drain port is provided on one side of the bottom of the liquid box, a liquid inlet pipe is provided on the top of the drain port, a float is provided inside the liquid inlet pipe, a connecting rod is provided on the top surface of the float, a drive motor is provided inside the liquid box, and a cross bar is provided at the output end of the drive motor.

[0013] Preferably, a magnet block is provided at the connection between the top of the shell door and the exhaust pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model ensures the air supply effect of the fan during operation by setting a ventilation filter component, and at the same time improves the air supply quality, ensures that the fan air supply will not affect the experiment, ensures the quality of the experiment, and further ensures that the harmful gases generated in the experiment are discharged upward in time under the action of the fan, avoiding the harm of harmful gases to the experimenters and improving the safety performance of the air-supplementing experimental fume hood.

[0016] 2. The utility model improves the practicality of the component by setting a gas purification component, ensures that the exhaust gas will not pollute the environment, and is beneficial to the development of environmental protection. The gas is discharged through the small holes on the surface of the orifice plate, avoiding the gas being affected by external gas and causing poor exhaust effect, making the air-supplementing experimental fume hood more applicable to a wider range of environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a cross-sectional view of the ventilation filter assembly of the present invention;

[0019] Figure 3 This is a cross-sectional view of the gas purification component of the present invention.

[0020] Figure 4 This is a cross-sectional view of the liquid purification component of the present invention.

[0021] In the figure: 1. Cabinet; 2. Air supply grille; 3. Ventilation filter assembly; 31. Door panel; 32. Non-woven drying mesh; 33. Glass fiber filter paper mesh; 34. Fixing block; 35. Steel wire nylon mesh; 36. Air inlet; 37. Air intake fan; 38. Air inlet duct; 39. Air outlet; 310. Ventilation shell; 311. Sealing block; 4. Fan; 5. Operating table; 6. Gas purification assembly; 61. Shell door; 62. Limit block; 63. Air distribution plate; 64. Sealing strip; 65. Activated carbon layer; 66. Liquid purification assembly; 661. Air guide duct; 662. Liquid box; 663. Cross bar; 664. Drive motor; 665. Drain port; 666. Floating block; 667. Liquid inlet pipe; 668. Connecting rod; 67. Orifice plate; 7. Exhaust duct. DETAILED DESCRIPTION

[0022] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] See also Figure 1-4 The utility model provides the following technical solutions: a supply air type experimental fume hood, comprising a cabinet body 1, an operating table 5 is arranged inside the cabinet body 1, supply air grilles 2 are arranged on both sides of the operating table 5, a fan 4 is arranged at the bottom of the supply air grille 2, an exhaust duct 7 is arranged on the top of the cabinet body 1, a ventilation filter component 3 is arranged on one side surface of the cabinet body 1, and a gas purification component 6 is arranged inside the exhaust duct 7.

[0025] Specifically, the ventilation filter assembly 3 includes a door panel 31, a non-woven drying net 32, a glass fiber filter paper net 33, a fixing block 34, a steel nylon net 35, an air inlet 36, an air intake fan 37, an air inlet pipe 38, an air outlet 39, a ventilation shell 310 and a sealing block 311. The ventilation shell 310 is provided on one side of the cabinet 1, and a door panel 31 is provided on one side of the ventilation shell 310. The air inlet 36 is provided at the bottom of the door panel 31, and the interior of the ventilation shell 310 is provided with a ventilation shell 310. There is an air intake fan 37, a steel wire nylon mesh 35 is provided on the top of the air intake fan 37, a glass fiber filter paper mesh 33 is provided on the top of the steel wire nylon mesh 35, a fixing block 34 is provided on one side of the glass fiber filter paper mesh 33, a sealing block 311 is provided on the other side of the glass fiber filter paper mesh 33, a non-woven drying mesh 32 is provided on the side of the glass fiber filter paper mesh 33 away from the steel wire nylon mesh 35, an air inlet pipe 38 is provided on the top of the air inlet pipe 38, and an air outlet 39 is provided on the top of the air inlet pipe 38.

[0026] By adopting the above technical solution, when the air-supplementing experimental fume hood is in use, air enters the ventilation shell 310 through the air inlet 36 under the action of the air intake fan 37. The air first passes through the steel wire nylon mesh 35 for the first level of impurity removal, and then passes through the glass fiber filter paper mesh 33 to remove fine particulate impurities in the air. Finally, the air is dried by the non-woven fabric drying mesh 32. The filtered gas enters the air outlet 39 at the bottom of the fan 4 through the air inlet pipe 38, ensuring the air supply effect of the fan 4 during operation, and at the same time improving the air supply quality, ensuring that the air supply of the fan 4 will not affect the experiment, ensuring the quality of the experiment, and further ensuring that the harmful gases generated in the experiment are discharged upward in time under the action of the fan 4, avoiding the harm of harmful gases to the experimenters.

[0027] Specifically, a handle is provided on the surface of the door panel 31 , and a rotating shaft is provided at the connection between the bottom of the door panel 31 and the ventilation shell 310 .

[0028] By adopting the above technical solution, it is ensured that when the filtering effect of the component is poor during use, the door panel 31 can be opened by the handle to replace the filter material that needs to be replaced, thereby improving the use efficiency.

[0029] When this embodiment is in use: When the air-supplementing experimental fume hood is in use, air enters the ventilation shell 310 through the air inlet 36 under the action of the air intake fan 37. The air first passes through the steel wire nylon mesh 35 for the first level of impurity removal, then passes through the glass fiber filter paper mesh 33 to remove fine particulate impurities in the air, and finally passes through the non-woven drying mesh 32 to dry the air. The filtered gas enters the air outlet 39 at the bottom of the fan 4 through the air inlet pipe 38, ensuring the air supply effect of the fan 4 during operation, while improving the air supply quality, ensuring that the air supply of the fan 4 will not affect the experiment, ensuring the quality of the experiment, and further ensuring that the harmful gases generated in the experiment are discharged upward in time under the action of the fan 4, avoiding the harm of harmful gases to the experimenters. By providing a handle on the surface of the door panel 31 and a rotating shaft at the connection between the bottom of the door panel 31 and the ventilation shell 310, it is ensured that when the filtering effect of the component is poor during use, the door panel 31 can be opened by the handle to replace the filter material that needs to be replaced, thereby improving the use efficiency.

[0030] Example 2

[0031] The difference between this embodiment and embodiment 1 is that: specifically, the gas purification component 6 includes a shell door 61, a limit block 62, an air equalizing plate 63, a sealing strip 64, an activated carbon layer 65, a liquid purification component 66 and a orifice plate 67, wherein a shell door 61 is provided on one side surface of the exhaust pipe 7, a limit block 62 is provided on one side surface of the shell door 61, an air equalizing plate 63 is provided on one side of the limit block 62, an activated carbon layer 65 is provided on the top of the air equalizing plate 63, a sealing strip 64 is provided on one side of the air equalizing plate 63, an orifice plate 67 is provided at the output end of the exhaust pipe 7, and a liquid purification component 66 is provided on one side of the orifice plate 67.

[0032] By adopting the above technical solution, when the harmful gas generated in the experiment needs to be discharged, the harmful gas is first filtered through the air equalizing plate 63, so that the harmful gas can more fully contact the activated carbon layer 65, filtering out harmful particles and impurities in the harmful gas, and then the harmful gas is purified and filtered again through the liquid purification component 66, so that the gas quality of the harmful gas can meet the emission standards, and finally discharged from the orifice plate 67. The gas is discharged through the small holes on the surface of the orifice plate 67, avoiding the gas being affected by external gas and resulting in poor discharge effect, improving the practicality of the component, ensuring that the discharged gas will not pollute the environment, and is conducive to the development of environmental protection.

[0033] Specifically, the liquid purification component 66 includes an air duct 661, a liquid box 662, a cross bar 663, a drive motor 664, a drain port 665, a float 666, a liquid inlet pipe 667 and a connecting rod 668, wherein an air duct 661 is provided inside the exhaust duct 7, a liquid box 662 is provided on one side of the air duct 661, a drain port 665 is provided on one side of the bottom of the liquid box 662, a liquid inlet pipe 667 is provided on the top of the drain port 665, a float 666 is provided inside the liquid inlet pipe 667, a connecting rod 668 is provided on the top surface of the float 666, a drive motor 664 is provided inside the liquid box 662, and a cross bar 663 is provided at the output end of the drive motor 664.

[0034] By adopting the above technical solution, after the harmful gas is filtered through the activated carbon layer 65, the gas enters the VOCs absorption liquid inside the liquid box 662 through the air guide pipe 661, and the harmful gas is further absorbed and filtered. At the same time, the driving motor 664 drives the cross bar 663 to rotate, accelerating the flow of the VOCs absorption liquid to more fully absorb and filter the harmful gas, and then discharge it from one side of the liquid box 662. When the VOCs absorption liquid needs to be replaced, it is only necessary to open the drain port 665 to discharge the VOCs absorption liquid, and then replenish the VOCs absorption liquid through the liquid inlet pipe 667. When the VOCs absorption liquid is replenished, the floating block 666 pushes the connecting rod 668 upward to prompt that the VOCs absorption liquid is replenished to the appropriate liquid level, ensuring that the gas quality of the harmful gas can meet the emission standard, while also improving the practicality of the component.

[0035] Specifically, a magnet block is provided at the connection between the top of the shell door 61 and the exhaust pipe 7 .

[0036] By adopting the above technical solution, it is ensured that after the activated carbon layer 65 is replaced, the shell door 61 can be fully closed, thereby improving the airtightness of the assembly.

[0037] When this embodiment is in use: when the harmful gas generated in the experiment needs to be discharged, the harmful gas is first filtered through the air balancing plate 63, so that the harmful gas can more fully contact the activated carbon layer 65, filter out harmful particles and impurities in the harmful gas, and then pass through the liquid purification component 66 to purify and filter the harmful gas again, so that the gas quality of the harmful gas can meet the emission standards, and finally be discharged from the orifice plate 67. The gas is discharged through the small holes on the surface of the orifice plate 67, avoiding the gas being affected by external gas and causing poor discharge effect, improving the practicality of the component, ensuring that the discharged gas will not cause pollution to the environment, and is beneficial to the development of environmental protection. After the harmful gas is filtered through the activated carbon layer 65, the gas enters the VOCs absorption liquid inside the liquid box 662 through the air guide pipe 661, and the harmful gas is further purified. Absorption and filtration, while driving the motor 664 to drive the cross bar 663 to rotate, accelerating the flow of VOCs absorption liquid to more fully absorb and filter the harmful gases, and discharge it from one side of the liquid box 662. When the VOCs absorption liquid needs to be replaced, it is only necessary to open the drain port 665 to discharge the VOCs absorption liquid, and then replenish the VOCs absorption liquid through the liquid inlet pipe 667. When the VOCs absorption liquid is replenished, the float 666 pushes the connecting rod 668 upward to prompt the VOCs absorption liquid to be replenished to the appropriate liquid level, ensuring that the gas quality of the harmful gases can meet the emission standards, and also improving the practicality of the component. By arranging a magnet block at the connection between the top of the shell door 61 and the exhaust pipe 7, it is ensured that after the activated carbon layer 65 is replaced, the shell door 61 can be fully closed to improve the air tightness of the component.

[0038] The structure and use principle of the operating table 5 and the air supply grille 2 in the present invention have been disclosed in an air supply type experimental fume hood disclosed in Chinese patent application No. 202223561357.6.

[0039] The working principle and use process of the present invention are as follows: the present invention is adjusted for an air supply type experimental fume hood. When the air supply type experimental fume hood is in use, air enters the ventilation shell 310 through the air inlet 36 under the action of the air inlet fan 37. The air first passes through the steel wire nylon mesh 35 for the first level of impurity removal, and then passes through the glass fiber filter paper mesh 33 to remove fine particulate impurities in the air. Finally, the air is dried by the non-woven fabric drying mesh 32. The filtered gas enters the air outlet 39 at the bottom of the fan 4 through the air inlet pipe 38, ensuring the air supply effect of the fan 4 during operation, while improving the air supply quality, ensuring that the air supply of the fan 4 will not affect the experiment, and ensuring the quality of the experiment. It further ensures that the harmful gases generated in the experiment are discharged upward in time under the action of the fan 4, avoiding the harm of harmful gases to the experimenters. By arranging a handle on the surface of the door panel 31 and a rotating shaft at the connection between the bottom of the door panel 31 and the ventilation shell 310, it is ensured that when the filtering effect of the component is not good during use, the door panel 31 can be opened by the handle to replace the filter material that needs to be replaced, thereby improving the use efficiency. When the harmful gases generated in the experiment need to be discharged, the harmful gases are first filtered through the air balancing plate 63, so that the harmful gases can more fully contact the activated carbon layer 65, filter out harmful particles and impurities in the harmful gases, and then pass through the liquid purification component 66 to purify the harmful gases. After the purification and filtration, the gas quality of the harmful gas can meet the emission standards, and finally it is discharged from the orifice plate 67. The gas is discharged through the small holes on the surface of the orifice plate 67, which avoids the gas being affected by external gas and causing poor discharge effect, improves the practicality of the component, and ensures that the exhaust gas will not pollute the environment, which is beneficial to the development of environmental protection. The utility model is adjusted for the air-supplementing experimental fume hood. After the harmful gas is filtered through the activated carbon layer 65, the gas enters the VOCs absorption liquid inside the liquid box 662 through the air guide pipe 661, and the harmful gas is further absorbed and filtered. At the same time, the driving motor 664 drives the cross bar 663 to rotate, which speeds up the flow of the VOCs absorption liquid more fully. The harmful gases are absorbed and filtered and discharged from one side of the liquid box 662. When the VOCs absorption liquid needs to be replaced, it is only necessary to open the drain port 665 to discharge the VOCs absorption liquid, and then replenish the VOCs absorption liquid through the liquid inlet pipe 667. When the VOCs absorption liquid is replenished, the float 666 pushes the connecting rod 668 upward to prompt the VOCs absorption liquid to be replenished to the appropriate liquid level, ensuring that the gas quality of the harmful gases can meet the emission standards. At the same time, the practicality of the component is also improved. By arranging a magnet block at the connection between the top of the shell door 61 and the exhaust pipe 7, it is ensured that after the activated carbon layer 65 is replaced, the shell door 61 can be fully closed, thereby improving the air tightness of the component.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air supply type laboratory fume hood, comprising a cabinet body (1), an operating table (5) provided inside the cabinet body (1), air supply grilles (2) provided on both sides of the operating table (5), a fan (4) provided at the bottom of the air supply grilles (2), and an exhaust duct (7) provided at the top of the cabinet body (1), characterized in that: A ventilation filter assembly (3) is provided on one side surface of the cabinet (1), and a gas purification assembly (6) is provided inside the exhaust pipe (7).

2. The air supply type experimental fume hood according to claim 1, characterized in that: The ventilation filter assembly (3) comprises a door panel (31), a non-woven fabric drying net (32), a glass fiber filter paper net (33), a fixing block (34), a steel wire nylon net (35), an air inlet (36), an air inlet fan (37), an air inlet pipe (38), an air outlet (39), a ventilation shell (310) and a sealing block (311), wherein a ventilation shell (310) is provided on one side surface of the cabinet (1), a door panel (31) is provided on one side of the ventilation shell (310), an air inlet (36) is provided at the bottom of the door panel (31), and the interior of the ventilation shell (310) is provided with a ventilation shell (310). An air intake fan (37) is provided, a steel wire nylon mesh (35) is provided on the top of the air intake fan (37), a glass fiber filter paper mesh (33) is provided on the top of the steel wire nylon mesh (35), a fixing block (34) is provided on one side of the glass fiber filter paper mesh (33), a sealing block (311) is provided on the other side of the glass fiber filter paper mesh (33), a non-woven fabric drying mesh (32) is provided on the side of the glass fiber filter paper mesh (33) away from the steel wire nylon mesh (35), an air inlet pipe (38) is provided on the top of the non-woven fabric drying mesh (32), and an air outlet (39) is provided on the top of the air inlet pipe (38).

3. The air supply type experimental fume hood according to claim 2, characterized in that: A handle is provided on the surface of the door panel (31), and a rotating shaft is provided at the connection between the bottom of the door panel (31) and the ventilation shell (310).

4. The air supply type experimental fume hood according to claim 1, characterized in that: The gas purification component (6) comprises a shell door (61), a limit block (62), an air distribution plate (63), a sealing strip (64), an activated carbon layer (65), a liquid purification component (66) and a perforated plate (67), wherein a shell door (61) is provided on one side surface of the exhaust pipe (7), a limit block (62) is provided on one side surface of the shell door (61), an air distribution plate (63) is provided on one side of the limit block (62), an activated carbon layer (65) is provided on the top of the air distribution plate (63), a sealing strip (64) is provided on one side of the air distribution plate (63), an orifice plate (67) is provided at the output end of the exhaust pipe (7), and a liquid purification component (66) is provided on one side of the orifice plate (67).

5. The air supply type experimental fume hood according to claim 4, characterized in that: The liquid purification component (66) comprises an air duct (661), a liquid box (662), a crossbar (663), a driving motor (664), a liquid discharge port (665), a floating block (666), a liquid inlet pipe (667) and a connecting rod (668), wherein the air duct (661) is provided inside the exhaust duct (7), a liquid box (662) is provided on one side of the air duct (661), a liquid discharge port (665) is provided on one side of the bottom of the liquid box (662), a liquid inlet pipe (667) is provided on the top of the liquid discharge port (665), a floating block (666) is provided inside the liquid inlet pipe (667), a connecting rod (668) is provided on the top surface of the floating block (666), a driving motor (664) is provided inside the liquid box (662), and a crossbar (663) is provided at the output end of the driving motor (664).

6. The air supply type experimental fume hood according to claim 4, characterized in that: A magnet block is provided at the connection between the top of the shell door (61) and the exhaust pipe (7).

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