CN110201964B

CN110201964B - Laboratory fume hood

Info

Publication number: CN110201964B
Application number: CN201910551404.2A
Authority: CN
Inventors: 周子轶; 刘昆
Original assignee: Liaoning Chengwei Laboratory Equipment Co ltd; Beijing Chengwei Borui Lab Equipment Co ltd
Current assignee: Beijing Chengwei Borui Lab Equipment Co ltd; Liaoning Chengwei Laboratory Equipment Co ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2024-05-10
Anticipated expiration: 2039-06-24
Also published as: CN110201964A

Abstract

The invention relates to a laboratory fume hood, which relates to the technical field of experimental equipment and comprises a workbench, a left side plate, a right side plate, a fan housing, a top plate, a cabinet body, a back plate and a protective door; the left side plate, the right side plate, the top plate, the workbench, the protective door and the back plate enclose a cavity, the fan housing is fixedly connected to the top plate, and the cabinet body is fixedly arranged at the bottom of the workbench; the edge of the workbench is also provided with a blowing component for preventing air in the cavity from escaping from the table surface of the workbench; the air blowing component comprises an air box, a plurality of fans arranged in the air box and a plurality of air outlet holes formed in the air box; the bellows is fixedly connected to the workbench; when the bellows is mounted on the workbench, the air outlet faces the inside of the chamber. The invention has the effect of automatically blowing air into the cavity when the protective door is opened, and preventing harmful gas in the cavity of the fume hood from escaping from the table surface of the workbench.

Description

Laboratory fume hood

Technical Field

The invention relates to the technical field of laboratory ventilation equipment, in particular to a laboratory ventilation cabinet.

Background

An open experiment table is basically used in the existing chemical experiment process, and when the chemical experiment is carried out, some toxic and harmful substances are easy to generate, the existing experiment table cannot be well protected, and long-term operation experiment can be harmful to the physical health of experiment staff.

The chinese patent with publication number CN105915479a discloses a fume hood, which comprises a left side plate, a right side plate, an exhaust fan, a baffle, a storage box, a workbench, a glass door and a guide plate, wherein the left side plate and the right side plate are respectively arranged at two ends of the workbench, the baffle is arranged between the left side plate and the right side plate, the glass door and the guide plate are respectively arranged at two sides of the baffle, the air suction end of the exhaust fan stretches into the cavity, the air exhaust end of the exhaust fan stretches out of the cavity, and the storage box is fixedly arranged at the bottom of the workbench. When the fume hood in the patent is used, the exhaust fan pumps out toxic gas generated in the experiment.

The prior art solutions described above have the following drawbacks: when the exhaust fan pumps out the air in the cavity, the air pressure in the cavity changes, so that the outside air can enter from the front opening of the fume hood.

However, when the harmful gas in the cavity is discharged, the exhaust efficiency of the exhaust fan is completely dependent, and in the actual exhaust fan arrangement, the exhaust fan is generally arranged outdoors, so that the operation condition of the exhaust fan cannot be effectively monitored, and once the exhaust fan is damaged, the power is reduced and the like, the exhaust of the harmful gas in the cavity is influenced.

Disclosure of Invention

The invention aims to provide a laboratory fume hood, which has the effect of blowing gas in a chamber and quickens the discharge of harmful gas in the chamber.

The above object of the present invention is achieved by the following technical solutions:

A laboratory fume hood comprises a workbench, a left side plate, a right side plate, a fan housing, a top plate, a cabinet body, a back plate and a protective door;

The edge of the workbench is also provided with a blowing component for preventing air in the cavity from escaping from the table surface of the workbench; the air blowing component comprises an air box, a plurality of fans arranged in the air box and a plurality of air outlet holes formed in the air box; the bellows is fixedly connected to the workbench;

When the bellows is mounted on the workbench, the air outlet faces the inside of the chamber.

Through adopting above-mentioned technical scheme, when the guard gate on the fume chamber was opened, the fan started, and wind in the fan can blow off from bellows, forms a curtain in the gate department of fume chamber for the wind that the fan blown off gets into in the cavity, prevents that harmful gas from reversely approaching gate department, also can blow harmful gas in the fume chamber, blows away harmful gas, makes things convenient for harmful gas's evacuation. Wherein, can set up the exit position department that is close to the cavity with the subassembly of blowing on the workstation, let the wind that the fan blown out have bigger scope of action on the workstation, harmful gas in the time of preventing the experiment is discharged from the guard gate.

The invention is further provided with: the bellows comprises a transverse plate, a vertical plate, an arc-shaped plate and a sealing plate, and the transverse plate, the vertical plate, the arc-shaped plate and the sealing plate are fixedly connected; the air outlet holes are arranged on the vertical plate, and the fans are fixedly connected to the transverse plate.

Through adopting above-mentioned technical scheme, when the fan blows out the wind, wind can contact with the arc earlier, and the arc leads the wind, lets wind parallel and level get into in the cavity more easily. Moreover, the staff can conveniently manufacture the bellows.

The invention is further provided with: the edge of the workbench is provided with a mounting step surface for placing the bellows, and the bellows is fixedly connected to the mounting step surface.

Through adopting above-mentioned technical scheme, when bellows fixed connection is on the installation step face, the diaphragm contacts with the bottom surface of installation step face, sets up the position of fan on the diaphragm in addition and surpasss the edge of workstation for bellows overlap joint is on the installation step face when bellows not fixed connection is on the workstation. And the vertical plate is contacted with the surface perpendicular to the bottom surface in the installation step surface. Through setting up the installation step, let the installation step as the mounted position of bellows, when the staff fixes the bellows on the workstation, the staff can be more convenient install the bellows on the workstation, and the position of installation is aligned more easily.

The invention is further provided with: the depth of the mounting step surface is set to be lower than the height of the air outlet holes arranged on the vertical plates, and when the bellows is placed on the mounting step surface, the working table surface is aligned with the lowest side of the air outlet holes.

Through adopting above-mentioned technical scheme, let the wind energy that the fan blown out via the apopore can be more convenient with table surface contact, can prevent more easily that harmful gas from leaking.

The invention is further provided with: and the wind guide wing is also arranged on the wind box, the wind guide wing is buckled on the arc-shaped plate, and the wind guide wing cover is arranged on the wind box.

Through adopting above-mentioned technical scheme, when getting into the cavity, external air can follow the surface of wind-guiding wing through, supplements the curtain that the exhaust gas formed in the bellows for the curtain is bigger, has better prevention effect to harmful gas.

The invention is further provided with: and a plurality of supporting plates for supporting the wind guide wings are fixedly connected to the arc-shaped plate.

Through adopting above-mentioned technical scheme, when establishing the arc cover on bellows, the backup pad supports the wind-guiding wing, can prevent wind-guiding wing and arc direct contact, lets there is the clearance between wind-guiding wing and the bellows arc for external gas can pass between wind-guiding wing and the bellows, more makes things convenient for external air to get into in the cavity.

The invention is further provided with: an air guide component is arranged in the cavity.

By adopting the technical scheme, the gas in the guide cavity can be conveniently and rapidly discharged.

The invention is further provided with: the air guide assembly comprises a first sub-plate and a second sub-plate; the first sub-plate and the second sub-plate are sequentially arranged from bottom to top; the first sub-plate is fixed on the rear side plate through the reinforcement, a gap exists between the first sub-plate and the rear side plate, and a distance exists between the first sub-plate and the workbench.

Through adopting above-mentioned technical scheme, the harmful gas that produces in the experiment passes through first minute board and second minute board when the exhaust first, and first minute board and second minute board can block harmful gas's backward flow, lets the staff safer when the experiment.

The invention is further provided with: the reinforcement is selected as a screw.

Through adopting above-mentioned technical scheme, the staff is more convenient and fast when installing second minute board and second minute board on the posterior lateral plate.

In summary, the beneficial technical effects of the invention are as follows:

1. by arranging the blowing component, the wind blown by the fan enters the cavity to blow the harmful gas in the fume hood, so that air flow balance is formed, and the harmful gas is conveniently discharged;

2. Through setting up the air guide subassembly, let the harmful gas in the cavity be convenient for discharge.

Drawings

Fig. 1 is a schematic view of a fume hood in the present embodiment;

Fig. 2 is a schematic view of the fume hood with the protective door removed in this embodiment;

fig. 3 is a schematic view of the fume hood according to the present embodiment when the protective door is lifted;

Fig. 4 is a schematic structural view of the fume hood in the present embodiment;

fig. 5 is a schematic structural diagram of a blower assembly in the present embodiment;

FIG. 6 is a schematic view of a bellows in this embodiment;

In the figure, 1, a workbench; 2. a left side plate; 3. a right side plate; 4. a fan housing; 5. a top plate; 6. a cabinet body; 7. a rear back plate; 8. a protective door; 9. a chamber; 10. a blowing assembly; 1001. a cross plate; 1002. a riser; 1003. an arc-shaped plate; 1004. a closing plate; 1005. a wind box; 1006. a fan; 1007. an air outlet hole; 1008. mounting a step surface; 1009. wind guiding wings; 1010. a support plate; 11. an air guide assembly; 1101. a first split plate; 1102. a second division plate; 1103. a reinforcement; 12. side uprights; 13. a first clamping plate; 14. a second clamping plate; 15. a glazing.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the laboratory fume hood disclosed by the invention comprises a workbench 1, a left side plate 2, a right side plate 3, a fan housing 4, a top plate 5, a cabinet body 6, a back plate 7 and a protective door 8.

Referring to fig. 3, a left side plate 2 and a right side plate 3 are respectively mounted at left and right ends of a workbench 1, a top plate 5 is mounted between the left side plate 2 and the right side plate 3, the left side of the top plate 5 is fixedly connected with the left side plate 2, the right side of the top plate 5 is fixedly connected with the right side plate 3, a protective door 8 is mounted at the front side of the top plate 5, a rear back plate 7 is fixedly arranged at the rear side of the top plate 5, a chamber 9 is defined by the left side plate 2, the right side plate 3, the top plate 5, the workbench 1, the protective door 8 and the rear back plate 7, a fan cover 4 is fixed on the top plate, and a cabinet 6 is fixedly mounted at the bottom of the workbench 1.

In order to facilitate the evacuation of the gas inside the chamber 9, a blowing assembly 10 is provided at the edge of the table 1.

Referring to fig. 4 and 5, the blower assembly 10 includes a bellows 1005 surrounded by a cross plate 1001, a vertical plate 1002, an arc plate 1003, and a closing plate 1004 (see fig. 6) which are fixedly connected together, and the connection between the cross plate 1001, the vertical plate 1002, the arc plate 1003, and the closing plate 1004 is a weld. The cross plate 1001, the riser 1002 and the arcuate plate 1003 are the same length. The transverse plate 1001 and the vertical plate 1002 are vertically and fixedly connected together, the fixed position is positioned at the edge positions of the transverse plate 1001 and the vertical plate 1002, the transverse plate 1001 and the vertical plate 1002 are aligned and fixedly connected together along the length direction, and the section is L-shaped after being fixedly connected together. The edges of both sides of the arc plate 1003 are fixedly connected with the transverse plate 1001 and the vertical plate 1002 respectively, and the transverse plate 1001, the vertical plate 1002 and the arc plate 1003 are fixedly connected together to form a quarter-circle cylinder. The closing plate 1004 is fixedly connected to both ends of the cross plate 1001, the vertical plate 1002 and the arc plate 1003, and closes the cylinder formed by fixedly connecting the cross plate 1001, the vertical plate 1002 and the arc plate 1003 together.

A plurality of fans 1006 are installed in the bellows 1005, the fans 1006 are fixedly connected to the transverse plate 1001 at equal intervals along the length direction of the transverse plate 1001, and air inlets of the fans 1006 penetrate out of the fans 1006, so that the fans 1006 can normally operate when the fans 1006 are started.

A plurality of air outlet holes 1007 are formed in the vertical plate 1002 in a penetrating manner, and the plurality of air outlet holes 1007 are arranged on the vertical plate 1002 at equal intervals along the length direction of the vertical plate 1002. The bellows 1005 is fixedly connected to the table 1 at a position near the outlet of the chamber 9, the bellows 1005 can be fixedly connected to the table 1 by welding or screw connection, and the transverse plate 1001 is in contact with the table surface of the table 1 when the bellows 1005 is fixed to the table 1.

With reference to fig. 4 and 5, when the protective door on the fume hood is opened, the fan is started, wind in the fan is blown out from the bellows, and a curtain is formed at the door opening of the fume hood. In the process that the fan 1006 blows out the wind, the fan blows into the bellows, and the wind can contact with the arc 1003 first, and the arc 1003 leads the wind, lets wind follow the air outlet 1007 department parallel and level on the riser 1002 and discharges for in the wind that the fan 1006 blown out gets into cavity 9, prevent harmful gas to be close to the entrance in opposite directions, also can blow the harmful gas in the fume chamber, blow away harmful gas, the convenient exhaust of harmful gas. Wherein, can set up the exit position department that is close to cavity 9 on workstation 1 with blast assembly 10, let the wind that fan 1006 blown out have bigger scope of action on workstation 1, prevent harmful gas in the time of the experiment from being discharged from guard gate 8.

A mounting step 1008 for placing the bellows 1005 is formed on the table 1 at a position close to the outlet of the chamber 9, the bellows 1005 is fixedly connected to the mounting step 1008, the cross plate 1001 is in contact with the bottom surface of the mounting step 1008, and the position of the fan 1006 on the cross plate 1001 exceeds the edge of the table 1, so that the bellows 1005 is overlapped on the mounting step 1008 when the bellows 1005 is not fixedly connected to the table 1. And the riser 1002 is in contact with a surface perpendicular to the bottom surface of the mounting step 1008. By providing the mounting step 1008, the mounting step 1008 is made to be the mounting position of the bellows 1005, and when a worker fixes the bellows 1005 on the table 1, the worker can more conveniently mount the bellows 1005 on the table 1, and the mounting position is more easily aligned.

The depth of the installation step surface 1008 is set to be lower than the height at which the air outlet holes 1007 are arranged on the riser 1002, and when the bellows 1005 is placed on the installation step surface 1008, the surface of the table 1 is aligned with the lowermost side of the air outlet holes 1007, so that the wind blown out by the fan 1006 through the air outlet holes 1007 can be more conveniently contacted with the surface of the table 1, and leakage of harmful gas can be more easily prevented.

Referring to fig. 5 and 6, an air guide vane 1009 is further mounted on the air box 1005, the bending degree of the air guide vane 1009 is the same as that of the arc plate 1003, the air guide vane 1009 is buckled on the arc plate 1003, the air guide vane 1009 is covered on the air box 1005, and the air guide vane 1009 is fixedly connected to the workbench 1. Through setting up wind-guiding wing 1009, when getting into the cavity, external air can follow the surface of wind-guiding wing and pass through, supply the curtain that exhaust gas formed in the bellows for the curtain is bigger, has better prevention effect to harmful gas. The gap exists between the wind guiding wing and the air box arc plate, so that external air can pass through the gap between the wind guiding wing and the air box, and external air can enter the cavity more conveniently.

In addition, in order to make the connection of the wind guiding wing 1009 on the bellows 1005 stronger, a plurality of support plates 1010 supporting the wind guiding wing 1009 are fixedly connected to the arc plate 1003, and the plurality of support plates 1010 are arranged on the arc plate 1003 at equal intervals along the length direction of the arc plate 1003, and when the arc plate 1003 is covered on the bellows 1005, the support plates 1010 support the wind guiding wing 1009, so that the wind guiding wing 1009 can be prevented from being in direct contact with the arc plate 1003. By providing the support plate 1010, the wind guiding wing 1009 is supported, and the wind guiding wing 1009 is prevented from directly contacting the arc plate 1003.

Referring to fig. 4, in order to facilitate rapid evacuation of the gas in the chamber 9, a gas guide assembly 11 is provided in the chamber 9, and the gas guide assembly 11 includes a first sub-plate 1101 and a second sub-plate 1102. The air guide assembly 11 is fixed to the rear panel 7 by a reinforcement 1103. The first and second sub-plates 1101 and 1102 are arranged in this order from bottom to top. The reinforcement 1103 is selected as a screw.

The first sub-plate 1101 is fixed to the back plate 7 by three reinforcing members 1103, and a gap exists between the first sub-plate 1101 and the back plate 7, and a certain distance exists between the first sub-plate 1101 and the table 1.

The distance between the second sub plate 1102 and the rear back plate 7 is greater than the distance between the first sub plate 1101 and the rear back plate 7, the lower end of the second sub plate 1102 is inclined in a direction away from the rear back plate 7, and a gap through which gas passes exists between the first sub plate 1101 and the second sub plate 1102. The second sub-plate 1102 is provided with a groove at its upper end, through which the second sub-plate 1102 is secured to the backplate 7 using a stiffener 1103.

The upper end of second minute board 1102 is to keeping away from the direction slope of backplate 7, and the upper end butt of second minute board 1102 is on roof 5, and two recesses have been seted up to the upper end of second minute board 1102, pass the recess and use reinforcement 1103 to fix second minute board 1102 on roof 5, and also have the clearance between second minute board 1102 and the roof 5. The suction end of the suction is arranged between the top plate 5 and the second sub-plate 1102. In this embodiment, the fixing member 1103 is a bolt. Through setting up air guide assembly 11, can enough make things convenient for harmful gas in the cavity 9 to discharge, also can shelter from the exhaust end of air exhauster, let the exhaust end of air exhauster have good disguise.

The illuminating lamp is arranged on the top plate 5, so that a light source can be provided in the chamber 9, and an experiment device can be seen more clearly by a worker when the worker performs an experiment.

Referring to fig. 3 and 4, side posts 12 are mounted on the left side plate 2 and the right side plate 3 in the same direction, and slide grooves for lifting and lowering the protective door are formed in the side posts, and when the two side posts 12 are mounted, the two side posts 12 block the edge of the protective door 8 and serve as rails for lifting the protective door. An inner cavity is formed in the side upright post 12 along the length direction of the side upright post 12, and two opposite surfaces of the two side upright posts 12 are arc surfaces which are bent outwards. The face that two side posts 12 contacted with left side board 2 or right side board 3 is the plane, the protrusion is provided with first cardboard 13 and second cardboard 14 on the face that two side posts 12 contacted with left side board 2 or right side board 3, first cardboard 13 and second cardboard 14 are arranged in parallel, and the distance between first cardboard 13 and the second cardboard 14 is the same with the thickness of left side board 2 or right side board 3, when the staff installs side post 12 on left side board 2 or right side board 3, the staff inserts left side board 2 or right side board 3 between first cardboard 13 and second cardboard 14, let first cardboard 13 and second cardboard 14 carry out the centre gripping to left side board 2 or right side board 3, make side post 12 install on left side board 2 or right side board 3 fast, the staff also can take out side post 12 from left side board 2 or right side board 3 through hard drawing, thereby when the fume chamber breaks down, the staff can dismantle side post 12 fast, and then demolish guard door 8 fast. The width of the first card 13 is set to be larger than the width of the second card 14, and the first card 13 is set in the chamber 9. The second clamping plate 14 is arranged at the edge of the side upright 12, and the first clamping plate 13 is arranged at the middle position of the side upright 12.

In connection with fig. 2, a glass window 15 is fixedly connected to the underside of the roof 5 near the side pillar 12, the arrangement direction of the glass window 15 is parallel to the arrangement direction of the protective door 8, and the protective door 8 is provided outside the glass window 15.

The implementation principle of the embodiment is as follows: when a worker performs an experiment in the fume hood, the fan 1006 is turned on to blow air in the chamber 9 of the fume hood, so that the air flow in the chamber 9 keeps flowing towards the direction of the fan housing 4, and harmful gas generated during the experiment is prevented from leaking from the outlet of the chamber 9.

The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims

1. A laboratory fume hood comprises a workbench (1), a left side plate (2), a right side plate (3), a fan housing (4), a top plate (5), a cabinet body (6), a back plate (7) and a protective door (8); the method is characterized in that: the edge of the workbench (1) is also provided with a blowing component (10) for preventing air in the cavity (9) from escaping from the table top of the workbench (1); the air blowing assembly (10) comprises an air box (1005), a plurality of fans (1006) arranged in the air box (1005) and a plurality of air outlet holes (1007) formed on the air box (1005); the bellows (1005) is fixedly connected to the workbench (1); when the bellows (1005) is installed on the workbench (1), the air outlet hole (1007) faces the inside of the cavity (9);

the bellows (1005) comprises a transverse plate (1001), a vertical plate (1002), an arc-shaped plate (1003) and a closing plate (1004), and the connection among the transverse plate (1001), the vertical plate (1002), the arc-shaped plate (1003) and the closing plate (1004) is fixed connection; the air outlet holes (1007) are arranged on the vertical plate (1002), and the fans (1006) are fixedly connected on the transverse plate (1001);

An installation step surface (1008) for placing a bellows (1005) is formed at the edge of the workbench (1), and the bellows (1005) is fixedly connected to the installation step surface (1008);

The depth of the installation step surface (1008) is set to be lower than the height of the air outlet holes (1007) arranged on the vertical plates (1002), and when the bellows (1005) is placed on the installation step surface (1008), the surface of the workbench (1) is aligned with the lowest side of the air outlet holes (1007);

the wind box (1005) is also provided with wind guiding wings (1009), the wind guiding wings (1009) are buckled on the arc-shaped plate (1003), and the wind guiding wings (1009) are covered on the wind box (1005);

A plurality of supporting plates (1010) for supporting the wind guiding wings (1009) are fixedly connected to the arc-shaped plate (1003).

2. A laboratory fume hood according to claim 1, wherein: an air guide component (11) is arranged in the cavity (9).

3. A laboratory fume hood according to claim 2, wherein: the air guide assembly (11) comprises a first sub-plate (1101) and a second sub-plate (1102);

the first division plate (1101) and the second division plate (1102) are sequentially arranged from bottom to top; the first sub-plate (1101) is fixed on the back plate (7) through the reinforcement (1103), a gap exists between the first sub-plate (1101) and the back plate (7), and a distance exists between the first sub-plate (1101) and the workbench (1).

4. A laboratory fume hood according to claim 3, wherein: the reinforcement (1103) is selected as a screw.