CN210385898U - Flow control biological safety cabinet - Google Patents
Flow control biological safety cabinet Download PDFInfo
- Publication number
- CN210385898U CN210385898U CN201921504540.8U CN201921504540U CN210385898U CN 210385898 U CN210385898 U CN 210385898U CN 201921504540 U CN201921504540 U CN 201921504540U CN 210385898 U CN210385898 U CN 210385898U
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- Prior art keywords
- air
- exhaust fan
- workbench
- exhaust
- flow
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- 239000011521 glass Substances 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 2
- 230000003434 inspiratory effect Effects 0.000 abstract description 2
- 238000011112 process operation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 230000002458 infectious effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 206010010904 Convulsion Diseases 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Devices For Use In Laboratory Experiments (AREA)
Abstract
The utility model relates to a biological test equipment technical field especially relates to a flow control biosafety cabinet, include: the device comprises a cabinet body, an air box, an air feeder and a workbench; the air feeder is communicated with the air box, an upper filter and a lower filter are arranged on the air box, an air outlet and an exhaust fan are arranged on the cabinet body, the upper filter is communicated with the air outlet, and the lower filter is communicated with the workbench; the exhaust fan sets up in the air outlet, through the rotation of exhaust fan changes the flow of air outlet. The utility model discloses a set up the exhaust fan on the cabinet body, the exhaust fan is connected with the last filter of bellows, adjusts the gas flow that the from last filter flows through the exhaust fan to promoted from the inspiratory airflow of cabinet body front end operation mouth, guarantee biosafety cabinet operation in-process operation mouth is in the state that induced drafts always, thereby has guaranteed operating personnel's operating safety factor.
Description
Technical Field
The utility model relates to a biological test equipment technical field especially relates to a flow control biosafety cabinet.
Background
The biosafety cabinet is designed for protecting the operator, the laboratory environment and the experimental materials from being exposed to infectious aerosols and splashes which may be generated in the operation process when operating infectious experimental materials such as primary cultures, strains of bacteria and viruses and diagnostic specimens. One part of air in a working area of the biological safety cabinet is sent into the air supply high-efficiency filter by the top air supply fan and is blown out from an air outlet surface after being filtered, so that clean air flow is formed. The clean air flow flows through the working area at a certain section air speed, so that a high-cleanness working environment is formed. The other part of the air in the working area is supplemented by sucking the indoor air from the air inlet at the front side of the table board. Air in the working area is sucked into the static pressure box by the fan through air return inlets on the front side and the rear side of the table board, and one part of the air is filtered by the exhaust filter and then is exhausted out of the safety cabinet through the top exhaust valve. The control of the air flow in a biosafety cabinet is therefore of considerable importance.
In the prior art, one part of gas blown into the air box by the blower flows into the workbench through the high-efficiency filter, the other part of the gas is discharged out of the biological safety cabinet through the high-efficiency filter, the discharged gas flow is equal to the gas flow sucked from the front window of the workbench, but due to the problem of uneven distribution of the gas flow in the air box, the air quantity sucked into the front window of the workbench is reduced or the uniformity of the locally sucked air is poor, so that unclean aerosol is leaked, and potential safety hazards are caused.
In view of the above problems, the designer is based on the practical experience and professional knowledge that are abundant for many years in engineering application of such products, and is engaged with the application of theory to actively conduct research and innovation, so as to create a flow control biosafety cabinet, which is more practical.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: a flow control biosafety cabinet is provided, which controls the outflow and inflow of gas in the biosafety cabinet.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a flow-controlled biosafety cabinet comprising: the device comprises a cabinet body, an air box, an air feeder and a workbench; the air feeder is communicated with the air box, an upper filter and a lower filter are arranged on the air box, an air outlet and an exhaust fan are arranged on the cabinet body, the upper filter is communicated with the air outlet, and the lower filter is communicated with the workbench; the exhaust fan sets up in the air outlet, through the rotation of exhaust fan changes the flow of air outlet.
Preferably, the air outlet is arranged at the top end of the cabinet body, and the exhaust fan is detachably fixed at the air outlet.
Preferably, the exhaust fan further comprises an exhaust flange and a fan blade, wherein the fan blade is arranged inside the exhaust flange and is axially and obliquely arranged with the exhaust flange.
Preferably, an operation window is arranged at the front end of the cabinet body and is made of glass.
Preferably, the operation window is inclined in a vertical direction and is inclined toward a direction away from the operator.
Preferably, the operating window is internally provided with a wind speed and direction sensor which is fixed on two inner side walls of the workbench, the wind speed and direction sensor and the exhaust fan are electrically connected with the PLC, and when the wind speed and direction sensor measures that the wind speed in the workbench is less than a set value through the operating port, the exhaust fan is started.
Preferably, the air feeder is electrically connected with the PLC, and when the exhaust fan is started and the wind speed and direction sensor measures that the wind speed and direction sensor is smaller than a set value, the rotating speed of the air feeder is increased.
Preferably, the PLC is further connected with an alarm device, and when the rotating speed of the air feeder is increased and the wind speed measured by the wind speed and direction sensor is smaller than a set value, the alarm device is triggered.
The utility model has the advantages that: the utility model discloses a set up the exhaust fan on the cabinet body, the exhaust fan is connected with the last filter of bellows, adjusts the gas flow that the from last filter flows through the exhaust fan to promoted from the inspiratory airflow of cabinet body front end operation mouth, guarantee biosafety cabinet operation in-process operation mouth is in the state that induced drafts always, thereby has guaranteed operating personnel's operating safety factor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front sectional view of a flow control biosafety cabinet according to an embodiment of the present invention;
FIG. 2 is a side sectional view of a flow control biosafety cabinet according to an embodiment of the present invention;
FIG. 3 is a perspective view of a flow control biosafety cabinet according to an embodiment of the present invention;
fig. 4 is a partial enlarged view of a portion a in fig. 3 according to an embodiment of the present invention;
fig. 5 is a schematic diagram of the connection between the exhaust fan and the blower and between the wind speed and direction sensor according to the embodiment of the present invention.
Reference numerals: 10-cabinet body, 11-air outlet, 12-exhaust fan, 13-operation window, 14-wind speed and direction sensor, 20-wind box, 21-upper filter, 22-lower filter, 30-blower, 40-workbench, 121-exhaust flange and 122-fan blade.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
The flow-controlled biosafety cabinet as shown in fig. 1 to 3 comprises: a cabinet 10, an air box 20, a blower 30 and a workbench 40; the blower 30 is communicated with the air box 20, the air box 20 is provided with an upper filter 21 and a lower filter 22, the cabinet body 10 is provided with an air outlet 11 and an exhaust fan 12, the upper filter 21 is communicated with the air outlet 11, and the lower filter 22 is communicated with the workbench 40; the exhaust fan 12 is disposed in the exhaust port 11, and the flow rate of the exhaust port 11 is changed by the rotation of the exhaust fan 12.
In the above embodiment, after the airflow blown out from the blower 30 enters the air box 20, a part of the airflow passes through the upper filter 21 of the air box and flows out through the air outlet 11, and another part of the airflow passes through the lower filter 22 and is blown down into the workbench 40 vertically, and the clean airflow performs positive pressure cleaning on the material in the workbench 40, as shown in fig. 2, after the airflow enters the workbench 40, the airflow is discharged through the air holes at the bottom of the workbench 40, the discharged gas is sucked into the air box 20 by the blower 30 to form a circulating airflow, and since a part of the airflow blown out by the blower 30 flows out, the external air needs to be supplemented, as shown in fig. 3, the front end of the cabinet 10 is provided with an operation opening, and the external air is sucked into the workbench through the operation opening and is sucked into the air box 20 through the air suction opening at the front end. When air exit 11 or last filter 21 produced the jam, the air that the fan 30 blew off is taken away by the convulsions end again behind workstation 40, because there is not the air current to flow from air exit 11, then there is not the outside air to inhale, when operating personnel operated this moment, then lost the protection that the negative pressure induced drafts, probably there is the bacterium to flow out in the workstation 40, and setting up of exhaust fan then makes the air current that blows off from fan 30 have partly through air exit 11 to discharge, the negative pressure of having guaranteed the operation mouth induced drafts, thereby operating personnel's security has been guaranteed.
Preferably, the air outlet 11 is disposed at the top end of the cabinet 10, and the air fan 12 is detachably fixed to the air outlet 11. The air outlet 11 is arranged at the top end of the cabinet body 10, so that the air is connected with an external pipeline and directly discharged to the outside. And the exhaust fan 12 is detachably arranged, so that the maintenance convenience of the exhaust fan 12 is improved.
Specifically, as shown in fig. 4, the exhaust fan 12 further includes an exhaust flange 121 and blades 122, and the blades 122 are disposed inside the exhaust flange 121 and are axially inclined from the exhaust flange 121. The exhaust flange 121 is provided with a mounting hole, the exhaust fan 12 is fixed on the exhaust port 11 through the mounting hole, and the fan blades 122 are obliquely arranged to cover a part of the channels of the exhaust flange 121, so that the control degree of the fan blades 122 on the air flow in the cabinet 10 is improved, that is, the passing air volume is small when the rotation speed of the fan blades 122 is slow, and the passing air volume is large when the rotation speed of the fan blades 122 is fast.
Referring to fig. 2 and 3, an operation window 13 is disposed at the front end of the cabinet body, and the operation window 13 is made of glass. The glass material is convenient for transmitting light and is convenient for an operator to observe and control.
Further, in order to prevent the reflection of light of the glass at the time of operation, the operation window 13 is provided obliquely in a vertical direction and is inclined toward a direction away from the operator. The inclined arrangement of the operating window 13 is also convenient for the vertically falling air flow to move downwards along the operating window glass, and the air flow is converged with the air flow sucked from the outside of the operating window 13 and enters the space where the air suction opening of the fan 30 is located from the front end of the workbench 40, so that the air sucked from the outside does not pollute the materials in the workbench.
Referring to fig. 3 and 5, a wind speed and direction sensor 14 is disposed in the operation window 13, the wind speed and direction sensor 14 is fixed on two inner sidewalls of the workbench 40, the wind speed and direction sensor 14 and the exhaust fan 12 are electrically connected to the PLC, and when the wind speed and direction sensor 14 detects that the wind speed blowing into the workbench 40 through the operation opening is less than a set value, the exhaust fan 12 is turned on. The wind speed and wind direction sensor 14 is used for detecting the amount of the airflow sucked from the outside to the front end of the workbench 40 so as to ensure that the wind is always sucked into the workbench 40 during operation, and when an abnormal condition is detected, timely treatment is ensured through the setting of a PLC program. In general, the exhaust fan 12 is not turned on, and when it is detected that the sucked air flow rate does not satisfy the condition, the exhaust fan 12 is turned on, so that the flow rate of the air flow blown by the blower 30 flowing out from the exhaust port 11 is increased, and thus, more external air flow needs to be supplemented to the operation window 13, and the flow rate of the air flow sucked by the operation window 13 is increased.
In the above embodiment, the blower 30 is preferably electrically connected to the PLC, and when the air velocity and direction sensor 14 detects that the air velocity and direction is less than a set value after the exhaust fan 12 is turned on, the rotation speed of the blower 30 is increased. When the exhaust fan 12 is still not satisfactory after being turned on, the upper filter 21 or the lower filter 22 may be clogged to cause a poor air flow, and at this time, the flow rate of the blower 30 is increased to increase the air flow pressure in the air box 20, thereby ensuring the air flow to pass through.
When the rotational speed that increases forced draught blower 30 still can't satisfy the requirement, explain that the filter needs to be changed the utility model provides an in, PLC still is connected with alarm device, and after forced draught blower 30's rotational speed improved, when the wind speed that wind speed direction sensor 14 recorded was less than the setting value, alarm device was triggered. The alarm device is fixed on the cabinet body 10, and when the alarm device gives an alarm, an operator replaces the upper filter 21 or the lower filter 22 to ensure the performance of the biological safety cabinet.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A flow-controlled biosafety cabinet, comprising: a cabinet body (10), an air box (20), a blower (30) and a workbench (40); the air feeder (30) is communicated with the air box (20), an upper filter (21) and a lower filter (22) are arranged on the air box (20), an air outlet (11) and an exhaust fan (12) are arranged on the cabinet body (10), the upper filter (21) is communicated with the air outlet (11), and the lower filter (22) is communicated with the workbench (40); the exhaust fan (12) is arranged in the exhaust outlet (11), and the flow of the exhaust outlet (11) is changed through the rotation of the exhaust fan (12);
an operation window (13) is arranged at the front end of the cabinet body, and the operation window (13) is made of glass;
a wind speed and direction sensor (14) is arranged in the operation window (13), the wind speed and direction sensor (14) is fixed on two inner side walls of the workbench (40), the wind speed and direction sensor (14) and the exhaust fan (12) are electrically connected with the PLC, and when the wind speed and direction sensor (14) detects that the wind speed blowing into the workbench (40) through an operation opening is less than a set value, the exhaust fan (12) is started;
the wind speed and direction sensor (14) is used for detecting the amount of air flow sucked into the front end of the workbench (40) from the outside so as to ensure that wind is always sucked into the workbench (40) during operation.
2. The flow-control biosafety cabinet according to claim 1, characterized in that the exhaust outlet (11) is arranged at the top end of the cabinet body (10), and the exhaust fan (12) is detachably fixed at the exhaust outlet (11).
3. The flow-control biosafety cabinet according to claim 1, wherein the exhaust fan (12) further comprises an exhaust flange (121) and fan blades (122), and the fan blades (122) are arranged inside the exhaust flange (121) and are obliquely arranged along the axial direction of the exhaust flange (121).
4. A flow-controlled biosafety cabinet according to claim 1, characterized in that the operating window (13) is arranged inclined in a vertical direction and is inclined in a direction away from the operator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921504540.8U CN210385898U (en) | 2019-09-10 | 2019-09-10 | Flow control biological safety cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921504540.8U CN210385898U (en) | 2019-09-10 | 2019-09-10 | Flow control biological safety cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210385898U true CN210385898U (en) | 2020-04-24 |
Family
ID=70341393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921504540.8U Expired - Fee Related CN210385898U (en) | 2019-09-10 | 2019-09-10 | Flow control biological safety cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210385898U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503743A (en) * | 2020-12-16 | 2021-03-16 | 南京博森科技有限公司 | Intelligent variable air volume control system for laboratory and control method thereof |
| CN113083382A (en) * | 2021-01-20 | 2021-07-09 | 中科美菱低温科技股份有限公司 | Biological safety cabinet and disassembly and assembly method thereof |
| CN115364909A (en) * | 2022-09-21 | 2022-11-22 | 邹辉鑫 | Safety monitoring system for biological safety cabinet |
-
2019
- 2019-09-10 CN CN201921504540.8U patent/CN210385898U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503743A (en) * | 2020-12-16 | 2021-03-16 | 南京博森科技有限公司 | Intelligent variable air volume control system for laboratory and control method thereof |
| CN112503743B (en) * | 2020-12-16 | 2022-04-05 | 南京博森科技有限公司 | Intelligent variable air volume control system for laboratory and control method thereof |
| CN113083382A (en) * | 2021-01-20 | 2021-07-09 | 中科美菱低温科技股份有限公司 | Biological safety cabinet and disassembly and assembly method thereof |
| CN115364909A (en) * | 2022-09-21 | 2022-11-22 | 邹辉鑫 | Safety monitoring system for biological safety cabinet |
| CN115364909B (en) * | 2022-09-21 | 2024-07-02 | 南阳市中心医院 | Biological safety cabinet safety monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200424 |