阅读说明：本技术 一种多功能实验室通风橱 (Multifunctional laboratory fume hood ) 是由 许良 孙宾 王鑫 邱法修 汪强 于 2021-07-26 设计创作，主要内容包括：本发明提供了一种多功能实验室通风橱,涉及实验室装备技术领域。该多功能通风橱,包括实验台面、纵向仓、水平仓、顶板和侧仓。在实验过程中,可将实验台面位置所产生以及室内各种化学试剂所挥发的有害气体,经上进风口、纵向风筒及排风口抽走,集中净化处理后排至大气；在实验过程中,实验室内近地面停留的较重的有害气体,由风流导入下进风口、下水平风筒、空气净化组件及上水平风筒,并继续从出风口输送至实验台面的位置,为实验人员提供新鲜洁净的空气；不进行实验时,风流导入下进风口、下水平风筒、空气净化组件及上水平风筒,并继续从出风口输送至实验台面及通风橱左右两侧的位置,实现彻底净化实验室内空气的目的。(The invention provides a multifunctional laboratory fume hood, and relates to the technical field of laboratory equipment. This multi-functional fume hood, including experiment mesa, vertical storehouse, horizontal storehouse, roof and side storehouse. In the experiment process, harmful gases generated at the position of the experiment table top and volatilized by various indoor chemical reagents can be pumped away through an upper air inlet, a longitudinal air duct and an air outlet, and are exhausted to the atmosphere after centralized purification treatment; in the experiment process, the heavier harmful gas staying near the ground in the laboratory is guided into the lower air inlet, the lower horizontal air duct, the air purification assembly and the upper horizontal air duct by the air flow and is continuously conveyed to the position of the experiment table from the air outlet, so that fresh and clean air is provided for experimenters; when the experiment is not carried out, the air flow is guided into the lower air inlet, the lower horizontal air duct, the air purification assembly and the upper horizontal air duct and is continuously conveyed to the experiment table board and the positions of the left side and the right side of the fume hood from the air outlet, so that the aim of thoroughly purifying the air in the experiment room is fulfilled.)

1. A multi-functional laboratory fume hood which characterized in that: comprises an experiment table top, a longitudinal bin, a horizontal bin, a top plate and a side bin;

the inner part of the longitudinal bin is a hollow cavity, the longitudinal bin is arranged at the rear side of the experiment table board and is arranged in a longitudinally extending mode, a longitudinal air duct is arranged in the longitudinal bin and is arranged in a longitudinally extending mode;

the horizontal bin is internally provided with a hollow cavity, the horizontal bin is arranged on the lower side of the experiment table board, the horizontal bin is arranged in an extending mode along the horizontal direction, a lower horizontal air duct is arranged at the lower end in the horizontal bin, the lower horizontal air duct is arranged in an extending mode along the horizontal direction, an upper horizontal air duct is arranged at the upper end in the horizontal bin, and the upper horizontal air duct is arranged in an extending mode along the horizontal direction;

the top plate is positioned above the experiment table top and extends along the horizontal direction;

the inner part of the side bin is a hollow cavity, the side bin is positioned on the left side surface and the right side surface of the experiment table board, the rear side of the side bin is connected with the longitudinal bin, the lower side of the side bin is connected with the horizontal bin, the upper side of the side bin is connected with the top plate, and the lower middle position of the side bin is connected with the experiment table board;

the lower end of the side surface of the horizontal bin is provided with a lower air inlet communicated with a lower horizontal air duct, the upper end of the horizontal bin is provided with an air outlet communicated with an upper horizontal air duct, and the air outlet is positioned at the outer side edge of the experiment table board;

an air purification assembly is arranged in the horizontal bin, an air purification assembly is connected between the lower horizontal air duct and the upper horizontal air duct, and the air purification assembly is used for purifying harmful gas flowing through the air purification assembly;

a fan is arranged in the lower horizontal air duct or the upper horizontal air duct and is used for forming air flow along the direction from the lower air inlet to the air outlet;

the lower end of the side surface of the longitudinal bin facing the experiment table top is provided with an upper air inlet communicated with the longitudinal air duct, and the upper air inlet is positioned at the inner side edge of the experiment table top;

and the upper end of the longitudinal bin is provided with an air outlet communicated with the longitudinal air duct.

2. A multi-functional laboratory fume hood as defined in claim 1 wherein: the show window is positioned above the experiment table board and in front of the longitudinal bin; when the show window is in an open state, the experiment table board, the longitudinal bin, the side bin and the top plate are surrounded together to form a semi-closed space; when the show window is in a closed state, the experiment table board, the longitudinal bin, the side bin, the top plate and the show window are enclosed together to form a closed space, and the air outlet at the edge position of the outer side of the experiment table board is positioned at the outer side of the show window.

3. A multi-functional laboratory fume hood as defined in claim 1 wherein: the air purification assembly comprises a carrier and an air purification unit arranged on the carrier, wherein the air purification unit is sequentially arranged from bottom to top into a primary filter screen for removing impurities in an air flow, an acid gas filter screen for removing acid gas in the air flow, an electrostatic dust removal filter screen for removing dust in the air flow, an ozone generator for generating ozone, a volatile organic compound catalytic oxidation screen for catalytically oxidizing volatile organic compounds at normal temperature and normal pressure and an ozone decomposition filter screen for decomposing ozone; the fan is arranged at the top of the ozone decomposition filter screen; the air current that the fan formed passes the air purification unit from bottom to top.

4. A multi-functional laboratory fume hood as defined in claim 1 wherein: the air purification assembly comprises a carrier and an air purification unit, and the air purification unit is assembled in the carrier; the air purification unit is sequentially arranged into a primary filter screen, an acid gas filter screen, an electrostatic dust removal filter screen, an ozone generator, a volatile organic compound catalytic oxidation screen and an ozone decomposition filter screen from outside to inside; the fan is arranged inside the ozone decomposition filter screen; the wind flow formed by the fan passes through the air purification unit from the outside to the inside.

5. A multi-functional laboratory fume hood as defined in claim 1 wherein: the purifier assembly bin is connected between the lower horizontal air duct and the upper horizontal air duct and is located inside the horizontal bin, the air purification assembly is arranged in the purifier assembly bin, an assembly opening is formed in the purifier assembly bin, and the assembly opening is detachably connected with a purifier door plate in a sealing mode.

6. A multi-functional laboratory fume hood as defined in claim 5 wherein: the purifier assembly bin is located at the inner side of the horizontal bin, and the space inside the horizontal bin except the purifier assembly bin is a storage bin.

7. A multi-functional laboratory fume hood as defined in claim 1 wherein: the longitudinal bin and/or the side bin are/is internally used for arranging a water supply pipeline, a power supply cable, an air supply pipeline, a vacuum pumping pipeline and a signal cable;

the side of vertical storehouse and/or side storehouse towards experiment mesa is provided with the assembly panel, is used for arranging water supply joint, electric socket, air feed joint, evacuation joint and signal joint on the assembly panel, and water supply joint connects the water supply pipe, and the power supply cable is connected to the electric socket, and air feed joint connects the air supply line, and evacuation joint connects the evacuation pipeline, and signal joint connects the signal cable.

8. A multi-functional laboratory fume hood as defined in claim 1 wherein: and the front side, the left side and the right side of the horizontal bin are provided with lower air inlets.

9. A multi-functional laboratory fume hood as defined in claim 1 wherein: and air outlets communicated with the upper horizontal air duct are formed in the left side surface and the right side surface of the side bin.

10. A multi-functional laboratory fume hood as defined in claim 1 wherein: the side of the longitudinal bin, the side bin or the top plate facing the experiment table top is provided with a camera.

Technical Field

The invention relates to the technical field of laboratory equipment, in particular to a multifunctional laboratory fume hood.

Background

Fume hoods are important equipment in laboratories. Various odor, moisture and inflammable, explosive and corrosive harmful gases can be generated in the experimental operation process, and the fume hood mainly plays the roles of air exhaust and air exchange so as to protect the safety of experimental operators. At present, the fume hood used in a laboratory can more easily exhaust gases lighter than air in the laboratory, and the exhausted harmful gases are less and the clean air is more. However, the gas volatilized during experimental operations and various chemical reagents often has a density heavier than air, such as HNO₃·H₂O (molecular weight FW 81), HF & H₂O(FW＝38)、HCl·H₂Inorganic gases such as O (FW ═ 54.5), and organic gases such as dichloromethane (FW ═ 84.39), diethyl ether (FW ═ 74.12), and n-hexane (FW ═ 86.18). These noxious gases, which are heavier than air, can remain near the floor in the laboratory, constantly corroding laboratory equipment. Harmful gas is accumulated continuously, the physical health of the experimenters is damaged, and even the experimenters die.

Indoor air, which contains a large amount of air Particulate Matter (PM), also known as aerosol, and Volatile Organic Compounds (VOCs) gas. PM2.5 refers to particles with the diameter phi of less than or equal to 2.5 microns of atmospheric particles, and PM1.0 refers to particles with the diameter phi of less than or equal to 1.0 micron in the air, which are also called ultrafine particles. While particles with a diameter between 2.5 and 10 μm are called coarse particles, as opposed to fine particles. PM2.5 will pass through the respiratory tract, reach the human lungs, and directly enter the alveoli. The submicron particles are present in a proportion close to 100% by weight and in a proportion of only 2% to 3% by weight. Statistics shows that the dust concentration in rural areas is about 10 ten thousand grains per liter, the dust concentration in suburbs is about 20 ten thousand grains per liter, the dust concentration in cities is about 30 ten thousand grains per liter, and the dust concentration in severely polluted areas can reach more than 100 ten thousand grains per liter.

In addition, the laboratory provides functions including water supply (tap water, deionized water, ultrapure water, etc.), power supply, gas supply, vacuum pumping, alarm, camera shooting, etc., to meet the needs of experimental operations and to ensure the safety of the experimental operators. The arrangement of water supply pipe, power supply cable, air supply pipeline and gas cylinder, evacuation pipeline and vacuum pump, signal cable etc. is more in a jumble, and the potential safety hazard is higher in the laboratory.

Disclosure of Invention

The invention aims to provide a multifunctional laboratory fume hood for efficiently purifying harmful gases in a laboratory.

In order to achieve the above purpose, the technical solution adopted by the invention is as follows:

a multifunctional laboratory fume hood comprises a laboratory table board, a longitudinal bin, a horizontal bin, a top plate and a side bin;

the inner part of the longitudinal bin is a hollow cavity, the longitudinal bin is arranged at the rear side of the experiment table board and is arranged in a longitudinally extending mode, a longitudinal air duct is arranged in the longitudinal bin and is arranged in a longitudinally extending mode;

the horizontal bin is internally provided with a hollow cavity, the horizontal bin is arranged on the lower side of the experiment table board, the horizontal bin is arranged in an extending mode along the horizontal direction, a lower horizontal air duct is arranged at the lower end in the horizontal bin, the lower horizontal air duct is arranged in an extending mode along the horizontal direction, an upper horizontal air duct is arranged at the upper end in the horizontal bin, and the upper horizontal air duct is arranged in an extending mode along the horizontal direction;

the top plate is positioned above the experiment table top and extends along the horizontal direction;

the inner part of the side bin is a hollow cavity, the side bin is positioned on the left side surface and the right side surface of the experiment table board, the rear side of the side bin is connected with the longitudinal bin, the lower side of the side bin is connected with the horizontal bin, the upper side of the side bin is connected with the top plate, and the lower middle position of the side bin is connected with the experiment table board;

the lower end of the side surface of the horizontal bin is provided with a lower air inlet communicated with a lower horizontal air duct, the upper end of the horizontal bin is provided with an air outlet communicated with an upper horizontal air duct, and the air outlet is positioned at the outer side edge of the experiment table board;

an air purification assembly is arranged in the horizontal bin, an air purification assembly is connected between the lower horizontal air duct and the upper horizontal air duct, and the air purification assembly is used for purifying harmful gas flowing through the air purification assembly;

a fan is arranged in the lower horizontal air duct or the upper horizontal air duct and is used for forming air flow along the direction from the lower air inlet to the air outlet;

the lower end of the side surface of the longitudinal bin facing the experiment table top is provided with an upper air inlet communicated with the longitudinal air duct, and the upper air inlet is positioned at the inner side edge of the experiment table top;

and the upper end of the longitudinal bin is provided with an air outlet communicated with the longitudinal air duct.

Preferably, the show window is also included and is positioned above the experiment table board and in front of the longitudinal bin; when the show window is in an open state, the experiment table board, the longitudinal bin, the side bin and the top plate are surrounded together to form a semi-closed space; when the show window is in a closed state, the experiment table board, the longitudinal bin, the side bin, the top plate and the show window are enclosed together to form a closed space, and the air outlet at the edge position of the outer side of the experiment table board is positioned at the outer side of the show window.

Preferably, the air purification assembly comprises a carrier and an air purification unit arranged on the carrier, wherein the air purification unit is sequentially arranged from bottom to top into a primary filter screen for removing impurities in the air flow, an acid gas filter screen for removing acid gas in the air flow, an electrostatic dust removal filter screen for removing dust in the air flow, an ozone generator for generating ozone, a volatile organic compound catalytic oxidation screen for catalytically oxidizing volatile organic compounds at normal temperature and normal pressure and an ozone decomposition filter screen for decomposing ozone; the fan is arranged at the top of the ozone decomposition filter screen; the air current that the fan formed passes the air purification unit from bottom to top.

Preferably, the air purification assembly comprises a carrier and an air purification unit, and the air purification unit is assembled in the carrier; the air purification unit is sequentially arranged into a primary filter screen, an acid gas filter screen, an electrostatic dust removal filter screen, an ozone generator, a volatile organic compound catalytic oxidation screen and an ozone decomposition filter screen from outside to inside; the fan is arranged inside the ozone decomposition filter screen; the wind flow formed by the fan passes through the air purification unit from the outside to the inside.

Preferably, a purifier assembly bin is connected between the lower horizontal air duct and the upper horizontal air duct, the purifier assembly bin is located inside the horizontal bin, the air purification assembly is arranged in the purifier assembly bin, an assembly opening is formed in the purifier assembly bin, and a purifier door plate is detachably connected to the assembly opening in a sealing mode.

Preferably, the purifier assembly bin is located at the inner side position inside the horizontal bin, and the space inside the horizontal bin except the purifier assembly bin is a storage bin.

Preferably, the longitudinal bin and/or the side bin are used for arranging a water supply pipeline, a power supply cable, an air supply pipeline, a vacuum pumping pipeline and a signal cable;

the side of vertical storehouse and/or side storehouse towards experiment mesa is provided with the assembly panel, is used for arranging water supply joint, electric socket, air feed joint, evacuation joint and signal joint on the assembly panel, and water supply joint connects the water supply pipe, and the power supply cable is connected to the electric socket, and air feed joint connects the air supply line, and evacuation joint connects the evacuation pipeline, and signal joint connects the signal cable.

Preferably, the front side, the left side and the right side of the horizontal bin are provided with lower air inlets.

Preferably, the left side surface and the right side surface of the side bin are also provided with air outlets communicated with the upper horizontal air duct.

Preferably, the side of the longitudinal bin, the side bin or the top plate facing the experiment table top is provided with a camera.

The beneficial technical effects of the invention are as follows:

in the experiment process, harmful gases generated at the position of the experiment table top and volatilized by various indoor chemical reagents can be pumped away through an upper air inlet, a longitudinal air duct and an air outlet, and are exhausted to the atmosphere after centralized purification treatment; in the experiment process, heavy harmful gas staying near the ground in the laboratory flows through the lower air inlet, the lower horizontal air duct, the air purification assembly and the upper horizontal air duct in sequence under the drive of the fan, and is continuously conveyed to the position of the experiment table from the air outlet, so that fresh and clean air is provided for experimenters; when the experiment is not carried out, under the driving of the fan, the air flow is sequentially guided into the lower air inlet, the lower horizontal air duct, the air purification assembly and the upper horizontal air duct and is continuously conveyed to the experiment table board and the positions at the left side and the right side of the fume hood from the air outlet, so that the aim of thoroughly purifying the air in the experiment room is fulfilled; in addition, be used for arranging water supply pipe, power supply cable, air supply line, evacuation pipeline and signal cable in vertical storehouse, the side storehouse, avoid each pipeline, cable to mix the winding, improve the security level in laboratory.

Drawings

FIG. 1 is a perspective view of a multi-functional laboratory fume hood in accordance with an embodiment of the present invention;

FIG. 2 is a top view of a multi-functional laboratory fume hood according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a first schematic view of airflow of the multifunctional laboratory fume hood according to the embodiment of the present invention, where the window in fig. 4 is in an open state;

fig. 5 is a second schematic view of airflow of the multifunctional laboratory fume hood according to the embodiment of the present invention, wherein the window in fig. 5 is in a closed state;

FIG. 6 is a schematic structural diagram of a right side bin according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a left side bin according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a first structure of an air purification assembly according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a second structure of an air purifying assembly according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a third structure of an air purifying assembly according to an embodiment of the present invention;

fig. 11 is a schematic layout diagram of the pipeline and the cable according to the embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings in combination with the specific embodiments. Certain embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In an embodiment of the present invention, a multifunctional laboratory fume hood is provided, please refer to fig. 1 to 11.

A multifunctional laboratory fume hood comprises a laboratory table board 1, a longitudinal cabin 21, a show window 22, a horizontal cabin 3, a top plate 4, a side cabin 5 and the like.

The interior of the longitudinal bin 21 is a hollow cavity, the longitudinal bin 21 is arranged at the rear side of the experiment table board 1, and the longitudinal bin 21 extends longitudinally. A longitudinal air duct 61 is arranged in the longitudinal bin 21, and the longitudinal air duct 61 extends along the longitudinal direction.

The inside cavity that is of horizontal bin 3, horizontal bin 3 set up in experiment table surface 1's downside, the lower surface of experiment table surface 1 of the upper end laminating of horizontal bin 3, the lower extreme laminating ground of horizontal bin 3, horizontal bin 3 extends along the horizontal direction and arranges. The lower end in the horizontal bin 3 is provided with a lower horizontal air duct 62, and the lower horizontal air duct 62 extends along the horizontal direction. An upper horizontal air duct 63 is arranged at the upper end in the horizontal bin 3, and the upper horizontal air duct 63 extends along the horizontal direction.

The top plate 4 is positioned above the experiment table top 1, and the top plate 4 extends along the horizontal direction.

The inside cavity that is of side storehouse 5, side storehouse 5 are located the left surface and the right flank of experiment mesa 1. Longitudinal bin 21 is connected to the rear side in side storehouse 5, and the downside in side storehouse 5 is connected horizontal bin 3, and roof 4 is connected to the upside in side storehouse 5, and experiment table 1 is connected to the middle position under the side storehouse 5.

The lower end of the side surface of the horizontal bin 3 is provided with a lower air inlet 71, and the lower air inlet 71 is communicated with the lower horizontal air duct 62. Wherein, the front side, the left side and the right side of the horizontal bin 3 are all provided with a lower air inlet 71. So that the harmful gas staying near the ground in the laboratory is sucked from the lower air inlets 71 on the front side, the left side and the right side of the horizontal bin 3 under the driving of the fan.

An air outlet 73 is formed in the upper end of the horizontal bin 3, the air outlet 73 is communicated with the upper horizontal air duct 63, and the air outlet 73 is located on the outer side edge of the experiment table board 1. The air outlet 73 at the outer edge of the experiment table board 1 is provided with a filter screen to prevent the articles on the experiment table board 1 from sliding into the air outlet 73. In the experiment operation process, under the drive of fan 631, the air current flows through air intake 71, lower horizontal dryer 62, air purification subassembly 65, upper horizontal dryer 63 and air outlet 73 in proper order, and harmful gas and particulate matter are thoroughly purified the back, flow out to the position of experiment mesa 1 from the air outlet 73 of the outside border position of experiment mesa 1, provide fresh air current for experiment operating personnel.

In addition, air outlets 73 are further formed in the left side surface and the right side surface of the side bin 5, and the air outlets 73 are communicated with the upper horizontal air duct 63. When the experiment operation is not performed, under the driving of the fan 631, the air current flows through the lower air inlet 71, the lower horizontal air duct 62, the air purification assembly 65, the upper horizontal air duct 63 and the air outlet 73 in sequence, and continuously flows out from the air outlet 73 at the outer edge position of the experiment table board 1 and the air outlets 73 at the left side position and the right side position of the fume hood, so as to achieve the purpose of purifying the air in the experiment room.

An air purification assembly 65 is arranged in the horizontal bin 3, the air purification assembly 65 is connected between the lower horizontal air duct 62 and the upper horizontal air duct 63, and the air purification assembly 65 is used for purifying harmful gas flowing through the air purification assembly 65. Specifically, a purifier assembly bin 64 is connected between the lower horizontal air duct 62 and the upper horizontal air duct 63, the purifier assembly bin 64 is located inside the horizontal bin 3, and the air purification assembly 65 is arranged in the purifier assembly bin 64. The purifier assembly bin 64 is provided with an assembly opening, and the assembly opening is detachably connected with a purifier door plate 112 in a sealing manner. The air cleaning assembly 65 may be passed through the mounting opening and the cleaner door 112 removed for maintenance and replacement of the air cleaning assembly 65.

The clarifier assembly storehouse 64 of this embodiment is located the inside inboard position in horizontal storehouse 3, and the inside space except that clarifier assembly storehouse 64 in horizontal storehouse 3 is the storing storehouse, and the storing storehouse is used for depositing article such as laboratory glassware, and the opening part in storing storehouse sets up cabinet door 111 to make things convenient for switch storing storehouse.

As shown in fig. 8, a first structural form of the air purifying assembly 65 is as follows: the air cleaning assembly 65 includes a carrier 651 and an air cleaning unit mounted within the carrier. The air purification unit is sequentially arranged into a primary filter screen 652, an acid gas filter screen 653, an electrostatic dust removal filter screen 654, an ozone generator 655, a volatile organic compound catalytic oxidation screen 656 and an ozonolysis filter screen 657 from bottom to top. The fan 631 is arranged at the top of the ozone decomposition filter screen 657, and the fan 631 is a variable frequency fan; the air current formed by the blower 631 passes through the air cleaning unit from the bottom to the top. The wind flows in from the bottom of the carrier 651, passes through the air cleaning unit from the bottom up, and is discharged from the top by the fan 631. The primary filter screen 652 is a nylon filter screen and is used for removing larger particle impurities in the air flow to realize primary filtration; the acid gas filter screen 653 is used to remove acid gases from the wind stream; the electrostatic dust removal filter screen 654 is an IFD electrostatic dust removal filter screen, the electrostatic dust removal filter screen 654 is used for removing all PM2.5 dust in the wind flow by adopting a high-voltage electrostatic technology, and the electrostatic dust removal filter screen can be washed with water and reused; the IFD electrostatic dust removal filter screen utilizes a strong electric field taking a dielectric material as a carrier to exert huge attraction on charged particles moving in the air, can adsorb almost 100% of airborne particles while generating minimum air flow impedance, and has a particularly obvious effect of removing particulate pollutants such as PM2.5 and the like. The ozone generator 655 uses an ultraviolet LED lamp for generating a small amount of ozone to achieve sterilization and partial oxidation of VOCs; the volatile organic catalytic oxidation net 656 is used for catalytically oxidizing VOCs at normal temperature and pressure to thoroughly decompose the VOCs into CO₂、N₂And H₂O to remove all VOCs; the ozone decomposition filter screen 657 is used for catalytically decomposing the surplus ozone.

As shown in fig. 9, the second structure of the air purifying assembly 65 is: the air cleaning assembly 65 includes a carrier 651 and an air cleaning unit mounted within the carrier. The air purification unit is sequentially arranged from outside to inside as a primary filter screen 652, an acid gas filter screen 653, an electrostatic dust removal filter screen 654, an ozone generator 655, a volatile organic compound catalytic oxidation screen 656 and an ozonolysis filter screen 657. The blower 631 is disposed inside the ozonolysis filter screen 657; the air current formed by the blower 631 passes through the air cleaning unit from the outside to the inside. The wind enters from the side of the carrier 651, enters from the side of the air cleaning unit and passes through the air cleaning unit, and is discharged from the top of the carrier 651 through the fan 631.

As shown in fig. 10, the third structural form of the air purifying assembly 65 is as follows: the air cleaning assembly 65 includes a carrier 651 and an air cleaning unit mounted within the carrier. The fan 631 is located in the middle, two sides of the fan 631 are respectively provided with a group of air purification units, and each group of air purification units is sequentially provided with a primary filter screen 652, an acid gas filter screen 653, an electrostatic dust removal filter screen 654, an ozone generator 655, a volatile organic compound catalytic oxidation screen 656 and an ozone decomposition filter screen 657 from outside to inside. The wind flow generated by the blower 631 passes through the side of the air cleaning unit and is discharged from the top of the carrier 651 through the blower 631.

The blower 631 is configured to generate an air flow along a direction from the lower inlet 71 to the outlet 73.

The lower end of the side surface of the longitudinal bin 21 facing the experiment table board 1 is provided with an upper air inlet 72, the upper air inlet 72 is communicated with the longitudinal air duct 61, and the upper air inlet 72 is positioned at the inner side edge of the experiment table board 1. An air outlet 74 is formed in the upper end of the longitudinal bin 21, the air outlet 74 is communicated with the longitudinal air duct 61, and the air outlet 74 is connected to an air exhaust system of a laboratory. The exhaust system is activated to create a flow of air in the direction from the upper intake opening 72 to the exhaust opening 74. In the experimental operation process, harmful gases generated at the experiment table top position of the experiment table top 1 and volatilized by various chemical reagents can be pumped away through the upper air inlet 72, the longitudinal air duct 61 and the air outlet 74, and are exhausted to the atmosphere after being intensively purified by a laboratory purification system.

The show window 22 is positioned above the laboratory table 1 and in front of the longitudinal bin 21. In this embodiment, the side walls of the side bins 5 on the left and right sides are provided with guide rails extending in the longitudinal direction, the left and right sides of the showcase 22 are slidably connected to the guide rails, and the showcase 22 can slide in the longitudinal direction. The show window 22 slides upwards to make the show window 22 in an open state, and the show window 22 slides downwards to be attached to the experiment table top of the experiment table top 1 to make the show window 22 in a closed state. When the show window 22 is in an open state, the experiment table board 1, the longitudinal bin 21, the side bin 5 and the top plate 4 are enclosed together to form a semi-closed space. When the show window 22 is in a closed state, the experiment table board 1, the longitudinal bin 21, the side bin 5, the top plate 4 and the show window 22 jointly surround to form a closed space, and the air outlet 73 at the outer side edge position of the experiment table board 1 is positioned at the outer side of the show window 22.

The showcase 22 is made of a transparent material (e.g., inorganic tempered glass or organic glass with hardened surface), so that the experiment operator can observe the experiment state through the showcase 22 when the showcase 22 is in the closed state.

When the show window 22 is in a closed state, the separation of the upper and lower air flows can be realized, and the air flow flowing out from the air outlet 73 at the outer side edge of the experiment table board 1 returns to the laboratory. When the show window 22 is closed, the laboratory can be isolated from the outside atmosphere, and the heat circulation between the laboratory and the outside air is avoided to keep the temperature in the laboratory constant.

The longitudinal bin 21 and the side bin 5 are used for arranging a water supply pipeline 91, a power supply cable 92, an air supply pipeline 93, a vacuum pumping pipeline 94 and a signal cable 95. In this embodiment, a water supply pipeline 91, a power supply cable 92, an air supply pipeline 93, a vacuum pumping pipeline 94 and a signal cable 95 are arranged in the modular wall 9, the longitudinal cabinet 2 is close to the modular wall 9, and the water supply pipeline 91, the power supply cable 92, the air supply pipeline 93, the vacuum pumping pipeline 94 and the signal cable 95 penetrate through hollow cavities of the longitudinal cabinet 2 and the lateral cabinet 5 and are located at the outer side of the air duct.

The side faces of the longitudinal bin 21 and the side bin 5 facing the experiment table board 1 are provided with an assembly panel 8, and the assembly panel 8 is used for arranging a water supply connector 81, an electric socket 82, an air supply connector 83, a vacuum-pumping connector 84 and a signal connector. The water supply connector 81 is connected with a water supply pipeline 91, the electric socket 82 is connected with a power supply cable 92, the air supply connector 83 is connected with an air supply pipeline 93, the vacuumizing connector 84 is connected with a vacuumizing pipeline 94, and the signal connector is connected with a signal cable 95.

The side cabinet 5 sets up camera 85 towards the side of experiment mesa 1, and camera 85 is used for regional experimental process real time monitoring of fume hood. The camera 85 is connected to a local memory or a cloud memory to store the monitoring video.

A basin 12 is arranged on one side of the experiment table board 1, and the basin 12 is positioned below the water supply joint 81.

Up to this point, the present embodiment has been described in detail with reference to the accompanying drawings. From the above description, those skilled in the art should be clearly aware of the multi-functional laboratory fume hood of the present invention. In the process of experimental operation, harmful gases generated at the position of the experiment table board 1 and volatilized by various indoor chemical reagents can be pumped away through the upper air inlet 72, the longitudinal air duct 61 and the air outlet 74 and exhausted to the atmosphere after centralized purification treatment; in the experimental operation process, under the drive of the fan 631, the harmful gas staying near the ground in the laboratory is sequentially guided into the lower air inlet 71, the lower horizontal air duct 62, the air purification assembly 65 and the upper horizontal air duct 63 by the air flow, and is continuously conveyed to the position of the experimental table top 1 from the air outlet 73, so as to provide fresh and clean air for experimental operators; when the experiment operation is not performed, under the driving of the fan 631, the air flow is sequentially guided into the lower air inlet 71, the lower horizontal air duct 62, the air purification assembly 65 and the upper horizontal air duct 63, and is continuously conveyed to the experiment table board 1 and the positions at the left side and the right side of the fume hood from the air outlet 73, so that the purpose of purifying the air in the experiment room is achieved; in addition, the water supply pipeline 91, the power supply cable 92, the air supply pipeline 93, the vacuum pumping pipeline 94 and the signal cable 95 are arranged in the longitudinal bin 21 and the side bin 5, so that the pipelines and the cables are prevented from being mixed and wound, and the safety level of a laboratory is improved.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.