CN220554688U - Biological safety cabinet with uniform and stable wind speed - Google Patents
Biological safety cabinet with uniform and stable wind speed Download PDFInfo
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- CN220554688U CN220554688U CN202321936544.XU CN202321936544U CN220554688U CN 220554688 U CN220554688 U CN 220554688U CN 202321936544 U CN202321936544 U CN 202321936544U CN 220554688 U CN220554688 U CN 220554688U
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- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000012864 cross contamination Methods 0.000 abstract description 2
- 241000894006 Bacteria Species 0.000 description 4
- 238000009395 breeding Methods 0.000 description 3
- 230000001488 breeding effect Effects 0.000 description 3
- 230000000739 chaotic effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Abstract
The utility model discloses a biosafety cabinet with uniform and stable wind speed, which comprises a blower and a wind box, wherein the left side plate of the wind box is of a Z-shaped structure and sequentially comprises a first vertical plate, a second horizontal plate and a second vertical plate from top to bottom, the blower is arranged on the left side plate, the inner wall of the first vertical plate is provided with a first air deflector, the inner wall of the right side plate of the wind box is provided with a third air deflector, and the third air deflector is connected with the second air deflector. The biosafety cabinet can ensure that the air flow field inside the bellows is uniformly distributed, the descending wind speed entering a working area is more uniform, cross contamination of products is avoided, the air flow in the bellows can be split in a certain proportion, and the workload of production staff is reduced.
Description
Technical Field
The application relates to the technical field of biosafety cabinets, in particular to a biosafety cabinet with uniform and stable wind speed.
Background
The biological safety cabinet is a negative pressure filtering exhaust cabinet for protecting personnel, products and environment, and the negative pressure air flow sucked inwards by the front window operation opening is used for protecting the safety of the operators; the descending air flow filtered by the high-efficiency filter is used for protecting experimental objects in the safety cabinet; the air flow is filtered by the high-efficiency filter and then discharged out of the safety cabinet to protect the environment. To ensure that the product provides adequate protection for personnel, products and the environment. The II-level biosafety cabinet is divided into four types of A1, A2, B1 and B2 according to the proportion of the discharged air flow to the total flow of the system and the internal design structure.
For the single-fan A2 type biological safety cabinet, the descending air flow is mixed air of partial inflow air flow and partial descending air flow of the safety cabinet, and the mixed air is filtered by a high-efficiency filter and then sent to a working area; the polluted air flow can be discharged to a laboratory after being filtered by the high-efficiency filter or discharged to the atmosphere through an exhaust pipeline through an exhaust interface of the safety cabinet.
The biosafety cabinet in the prior art mainly has the following problems: firstly, an empty box or a simple mesh plate is added in the air supply box, a chaotic flow field is easily formed in the air supply box by air, the flow direction is uncontrollable, and the proportion of the exhaust flow to the total flow of the system is unstable; secondly, the air outlet at the top of the biosafety cabinet can change the area of the air outlet through an air adjusting plate to stabilize the ratio of the air outlet flow to the total flow of the system, but the repeated adjustment and setting of production personnel are required to reach a balance point, so that the workload of the production personnel is increased; thirdly, the air duct is soft in use, and is made of soft materials, so that wrinkles exist, and bacteria are easy to breed when the air duct is used for a long time.
Disclosure of Invention
In order to solve the technical problems that an air flow field in a biosafety cabinet bellows is chaotic, the manual adjustment of the exhaust flow is complex and complicated and the like in the prior art, the biosafety cabinet with uniform and stable wind speed is provided.
The utility model provides a biological safety cabinet of even stable wind speed, this biological safety cabinet includes forced draught blower and bellows, and the left side board of bellows is Z shape structure, from last to including first vertical board, second horizontal plate and the vertical board of second down in proper order, and the forced draught blower is installed on the left side board, and first aviation baffle is installed to the inner wall of first vertical board, installs the third aviation baffle on the right side board inner wall of bellows, and the second aviation baffle is connected to the third aviation baffle.
Optionally, the first air deflector and the third air deflector are both in a U-shaped structure.
Optionally, one end of the first air deflector is connected with the lower part of the inner wall of the first vertical plate, and the other end of the first air deflector is open and is equal to one half of the height of the second vertical plate.
Optionally, both ends of the third air deflector are connected with the inner wall of the right side plate.
Optionally, the second air deflector is a single plate inclined to the upper left.
Optionally, the second air deflector forms an included angle of 15 degrees with the bottom plate of the air box.
Optionally, the first vertical plate is provided with an air supply port, and the air supply port is communicated with an air outlet of the blower.
Optionally, a rigid air duct connecting piece is arranged at the top of the air box, and an exhaust filter is arranged at the top of the rigid air duct connecting piece.
Optionally, an air supply filter is installed at the bottom of the air box.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the biological safety cabinet with uniform and stable wind speed can enable the air flow field in the bellows to be more uniform and enable the descending wind speed entering the working area to be more uniform under the condition of using a single-fan structural design, so that cross contamination of products is avoided;
2. the biosafety cabinet with uniform and stable wind speed can split the air flow in the bellows in a certain proportion, so that the proportion control of the exhaust flow in the total flow of the system is more stable without an air adjusting plate of an air outlet, and the workload of production personnel is reduced;
3. the biological safety cabinet with the uniform and stable wind speed can effectively avoid hidden danger of bacteria retention and breeding by adopting the rigid air duct connecting piece, and can better protect operators.
Drawings
FIG. 1 is a schematic view of the overall structure of a biosafety cabinet according to an embodiment of the application;
FIG. 2 is a schematic view of a bellows according to an embodiment of the present application;
FIG. 3 is a schematic flow diagram of an embodiment of a biosafety cabinet according to the subject application;
FIG. 4 is a schematic flow diagram of a bellows according to an embodiment of the present application.
Reference numerals illustrate: 1. a blower; 2. a wind box; 3. a first air deflector; 4. a second air deflector; 5. a third air deflector; 6. a rigid duct connection; 7. an exhaust filter; 8. an air supply filter; 9. and an air supply port.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-4.
The embodiment of the application discloses a biological safety cabinet with uniform and stable wind speed.
Referring to fig. 1 to 4, a biosafety cabinet with uniform and stable wind speed comprises a blower 1 and a wind box 2, wherein a left side plate of the wind box 2 is of a Z-shaped structure, the biosafety cabinet sequentially comprises a first vertical plate, a second horizontal plate and a second vertical plate from top to bottom, the blower 1 is arranged on the left side plate, that is, the blower 1 is arranged on the outer side of the Z-shaped structure, and the second horizontal plate, the second vertical plate and a bottom plate of the wind box 2 form a left side air channel. The inner wall of the first vertical plate is provided with a first air deflector 3, the inner wall of the right side plate of the air box 2 is provided with a third air deflector 5, and the third air deflector 5 is connected with a second air deflector 4.
According to the biosafety cabinet with uniform and stable wind speed, the first air deflector 3, the second air deflector 4 and the third air deflector 5 are arranged in the air box 2, air pumped into the air box 2 by the blower 1 is forced to split by the three air deflectors, so that the air is uniformly discharged from the top or the bottom of the air box 2, and the total flow of the air discharged from the top of the air box 2 and the total flow of the system are in a fixed proportion.
Specifically, the first air deflector 3 and the third air deflector 5 are both in a U-shaped structure, and 2 horizontal lines of the U-shaped structure are parallel to the bottom plate of the bellows 2.
One end of the first air deflector 3 is connected with the lower part of the inner wall of the first vertical plate, the other end of the first air deflector is open and is equal to one half of the second vertical plate in height, and the design is such that the first air deflector 3 has good air guiding effect, and the arc end of the U-shaped structure of the first air deflector 3 is arranged in the direction away from the first vertical plate. The first air deflector 3 is used for dividing the air pumped by the blower 1.
And two tail ends of the third air deflector 5 are connected with the inner wall of the right side plate. The arc end of the U-shaped structure of the third air deflector 5 is arranged in a direction away from the right side plate.
The second air deflector 4 is a single plate inclined to the upper left.
The second air deflector 4 forms an included angle of 15 degrees with the bottom plate of the air box 2.
The first vertical plate is provided with an air supply opening 9, and the air supply opening 9 is communicated with an air outlet of the air feeder.
Preferably, the height of the right side plate is 260mm and the height of the second vertical plate is 75mm, that is, the total height of the first vertical plate and the second vertical plate in the vertical direction is 260mm. The distance between the tail end of the upper part of the U-shaped structure of the first air deflector 3 and the lower end of the first vertical plate is 45mm, and after the air pumped by the blower 1 is split by the first air deflector 3, the air is split by the second air deflector 4 and the third air deflector 5 to form an upper exhaust duct and a lower air delivery duct. The second air deflector 4 is a single plate and forms a 14-degree included angle with the bottom plate of the air box 2, the distance between the tail end of the second air deflector 4 and the first vertical plate in the horizontal direction is 245m, the second air deflector 4 is arranged to be stable in air dividing proportion between the angle and the distance, the third air deflector 5 is a U-shaped bending plate, the U-shaped opening side is connected with the air box 2, the U-shaped bottom side is connected with the second air deflector 4, and the height of the lower side plate of the third air deflector 5 is consistent with the height of the left side of the air box 2.
The top of the bellows 2 is provided with a rigid air duct connecting piece 6, and an exhaust filter 7 is arranged at the top of the rigid air duct connecting piece 6. The rigid air duct connecting piece 6 can effectively avoid hidden danger of bacteria retention and breeding, and can better protect operators. The air flowing out of the top plate of the bellows 2 enters the rigid air duct connecting piece 6 and then enters the exhaust filter 7 for filtering and purifying.
The bottom of the bellows 2 is provided with a blast filter 8. The air flowing out of the bottom plate of the bellows 2 enters the air supply filter 8 to be purified and filtered.
The biological safety cabinet with uniform and stable wind speed provided by the utility model has the advantages that the airflow direction in the bellows 2 is as follows:
referring to fig. 3-4, the blower 1 blows air into the blower 2 through the air supply port 9 to form an air flow, the air is split into three parts after being fed into the blower 2 from the air supply port 9, the second horizontal plate, the second vertical plate and the bottom plate of the blower 2 form a left air channel, the first part flows into the left air channel of the blower 2 along the inside of the U-shaped structure of the first air deflector 3, flows into the left air channel in the air guide gap reversely under the blocking action of the second vertical plate of the blower 2, and then flows out of the bottom plate of the blower 2 downwards after flowing into the left air channel, and enters the air supply filter 8; the second part of the fed air flows into the lower air delivery channel under the action of the second air guide plate 4 and the third air guide plate 5, and the air flow entering the lower air delivery channel area is uniformly discharged downwards from the left, the middle and the right of the lower air delivery channel under the action of the first air guide plate 3, the second air guide plate 4 and the third air guide plate 5 respectively; the third part of the fed air flows into the upper exhaust duct under the action of the second air deflector 4 and the third air deflector 5. The upper exhaust duct is designed for a rigid connecting piece with a smooth and flat inner wall, and can effectively avoid the survival and breeding of microorganism bacteria. The wind energy sent by the blower 1 is divided into a plurality of parts for diversion and reducing the wind speed by the combined action of three wind deflectors in the wind box 2. The air is equalized in the air box 2 and then passes through the air equalizing screen plate to enter the operation area through the high-efficiency filter.
The wind speed value of each point in the biological safety cabinet descending wind speed test can reach the requirement that the actual measurement value of each test point in the YY056-2011 document and the average flow velocity of the area thereof are different by not more than +/-20 percent, and the proportion of the exhaust flow to the total flow of the system is more stable in the design of a single fan system, so that the workload of production staff is reduced.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (9)
1. The utility model provides a biological safety cabinet of even stable wind speed which characterized in that: the biosafety cabinet comprises a blower and an air box, wherein a left side plate of the air box is of a Z-shaped structure, the biosafety cabinet sequentially comprises a first vertical plate, a second horizontal plate and a second vertical plate from top to bottom, the blower is arranged on the left side plate, a first air deflector is arranged on the inner wall of the first vertical plate, a third air deflector is arranged on the inner wall of a right side plate of the air box, and the third air deflector is connected with the second air deflector.
2. The biosafety cabinet with uniform and stable wind speed according to claim 1, wherein: the first air deflector and the third air deflector are both U-shaped structures.
3. The biosafety cabinet with uniform and stable wind speed according to claim 2, wherein: one end of the first air deflector is connected with the lower part of the inner wall of the first vertical plate, and the other end of the first air deflector is open and is equal to one half of the second vertical plate in height.
4. The biosafety cabinet with uniform and stable wind speed according to claim 2, wherein: and two tail ends of the third air deflector are connected with the inner wall of the right side plate.
5. The biosafety cabinet with uniform and stable wind speed according to claim 1, wherein: the second air deflector is a single plate inclined to the upper left.
6. The biosafety cabinet with uniform and stable wind speed according to claim 5, wherein: the second air deflector forms an included angle of 15 degrees with the bottom plate of the air box.
7. A biosafety cabinet with uniform and stable wind speed according to any of claims 1-6, characterized in that: and the first vertical plate is provided with an air supply port which is communicated with an air outlet of the air feeder.
8. A biosafety cabinet with uniform and stable wind speed according to any of claims 1-6, characterized in that: the top of the bellows is provided with a rigid air duct connecting piece, and an exhaust filter is arranged at the top of the rigid air duct connecting piece.
9. A biosafety cabinet with uniform and stable wind speed according to any of claims 1-6, characterized in that: the bottom of the bellows is provided with an air supply filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321936544.XU CN220554688U (en) | 2023-07-22 | 2023-07-22 | Biological safety cabinet with uniform and stable wind speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321936544.XU CN220554688U (en) | 2023-07-22 | 2023-07-22 | Biological safety cabinet with uniform and stable wind speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220554688U true CN220554688U (en) | 2024-03-05 |
Family
ID=90051511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321936544.XU Active CN220554688U (en) | 2023-07-22 | 2023-07-22 | Biological safety cabinet with uniform and stable wind speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220554688U (en) |
-
2023
- 2023-07-22 CN CN202321936544.XU patent/CN220554688U/en active Active
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