CN2608161Y - Air screen curtain device of biological safety cabinet door - Google Patents
Air screen curtain device of biological safety cabinet door Download PDFInfo
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- CN2608161Y CN2608161Y CN 03220397 CN03220397U CN2608161Y CN 2608161 Y CN2608161 Y CN 2608161Y CN 03220397 CN03220397 CN 03220397 CN 03220397 U CN03220397 U CN 03220397U CN 2608161 Y CN2608161 Y CN 2608161Y
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- cabinet door
- air quantity
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Abstract
The utility model relates to a biological safety cabinet, in particular to an air screen curtain device of biological safety cabinet door, which comprises an air machine, an operating chamber and an exhaust passage. The operating chamber wind inlet is on the upper part of the working room and is communicated with the wind outlet of the wind machine; the operating chamber wind outlet is on the lower part of working room and is communicated with the exhaust passage. The operating chamber wind outlet extends to the inner side of the cabinet door. The point is that the utility model also comprises a wind flow determining valve and a valve automatic control device. The exhaust passage goes through the valve and is communicated with the outside. The export end of the valve automatic control device is connected with the control end; the import end of the valve automatic control device is connected with the cabinet door. Compared with present technique, the utility model has the advantages of that the opening of the wind flow determining valve can be controlled by the opening of the cabinet door to guarantee the steady standard state of the air screen curtain.
Description
Technical field
The utility model relates to a kind of Biohazard Safety Equipment, particularly a kind of Biohazard Safety Equipment cabinet door air curtain device.
Background technology
Biohazard Safety Equipment is for operating personnel and personnel's safety on every side thereof, and the contamination gas colloidal sol that takes place when handling dangerous microorganism is isolated in defence installation in the operating area.In order to prevent that cabinet internal contamination gas from overflowing, also in order to prevent that room air from entering operating platform in the cabinet, protection experiment article are avoided external interference simultaneously, need be at Biohazard Safety Equipment cabinet door place from air intake outside to inside to form the air curtain of certain flow rate.
Referring to accompanying drawing 1, Biohazard Safety Equipment cabinet door air curtain device in the routine techniques comprises blower fan 1, operating room 2 and air exhaust passage 3, operating room 2 is communicated with blower fan 1 air outlet by the air inlet of its top, the below, operating room has exhaust outlet, this exhaust outlet is communicated with air exhaust passage 3, this exhaust outlet always opening to cabinet door 21 inboards, like this, when the air that enters when blower fan 1 from up to down forms circulating currents through operating room 2, effect because of negative pressure, outdoor airflow is inhaled in the cabinet door 21, and discharges through operating room's 2 exhaust outlets, thereby forms a heavy air curtain at cabinet door 21 places.But this class safety cabinet suction of only keeping a quantitative air-flow at present, along with cabinet Men Kaida, flow area increases; the speed of air-flow descends when being lower than nominal flow rate; its defencive function weakens greatly, therefore can only take some passive measures at present, as door aperture limit alarm device.
Invention constitutes
The purpose of this utility model is to overcome weak point of the prior art and provides a kind of air curtain flow velocity that guarantees to be in the Biohazard Safety Equipment cabinet door air curtain device of standard state.
The purpose of this utility model can realize by following approach:
Biohazard Safety Equipment cabinet door air curtain device, comprise blower fan, operating room and exhaust passage, operating room's air inlet is positioned at the top, operating room and is communicated with fan outlet, operating room's exhaust outlet is positioned at the below, operating room and is communicated with the exhaust passage, operating room's exhaust outlet opening is to cabinet door inboard, its structural feature is, also comprise and a kind ofly decide the air quantity valve and a kind ofly decide air quantity opening of valves amount automaton, the exhaust passage is decided the air quantity valve by this and is in communication with the outside, the output of deciding air quantity opening of valves amount automaton is connected with the open amount control end of deciding the air quantity valve, and the input of deciding air quantity opening of valves amount automaton then is connected with the cabinet door.
Like this, make opener and the interlock of cabinet door opener of deciding the air quantity valve by the bridge joint effect of deciding air quantity opening of valves amount automaton, make open amount and the cabinet door open amount interlock variation relation in direct ratio of deciding the air quantity valve, decide the flow increasing in direct ratio of air quantity valve when being cabinet Men Kaida, deciding air quantity opening of valves amount strengthens, the then corresponding increase of negative pressure in the cabinet door, thereby make to be inhaled into the also corresponding increase of air flow rate in the cabinet door outside the operating room, guaranteed that the air curtain flow velocity remains on standard state always.
The purpose of this utility model can also realize by following approach:
Decide air quantity opening of valves amount automaton for this, multiple concrete selection can be arranged:
Wherein a kind of specifically:
It is a kind of mechanical driving device, and the cabinet door is in transmission connection by this mechanical driving device and the open amount control end of deciding the air quantity valve.
This mechanical driving device can be a kind of mechanical hunting gear, and its composition can be a kind of linkage, but can be planar linkage mechanism usually, and spatial linkage is adopted in less consideration.Further specifically can be that a kind of hinge returns linkage, at this moment, first bar is connected with the cabinet door, first bar and the second bar intersection are a kind of hinges, this hinges fixing fixes on the cabinet, and second bar is also hinged by a kind of hinge and the 3rd bar, and the 3rd bar then is connected with the open amount control end of deciding the air quantity valve, at this moment, cabinet door upper and lower moved all and will decide the open amount control end corresponding actions of air quantity valve and the action of controlling this valve together with driving this.Therefore, it is a kind of mechanical hunting gear that this hinge returns linkage actual, decides the change of air quantity opening of valves amount because the change of cabinet door open amount the time can link.And whole linkage component is realized by mechanical device fully.
This another kind of deciding air quantity opening of valves amount automaton is selected:
It is a kind of electronic automatic control device, comprises sensor, controller and actuator, and the sensor signal output is electrically connected with actuator by controller, and actuator then is in transmission connection with the open amount control end of deciding the air quantity valve.
Like this, the open amount of sensor sensing cabinet door, and after converting the signal of telecommunication to, pass to controller, after via controller is handled, control the actuator corresponding actions to drive the action of deciding the air quantity valve by the controller output drive signal.
This electronic automatic control device can be a kind of electronics follow-up control device.This electronic servo is the same with mechanical hunting gear, and when can change because of cabinet door open amount and link and decide the variation of air quantity opening of valves amount, but whole servo-actuated linkage is then realized by electronic-controlled installation.Its concrete selection can have following two kinds, certainly, can also be specializing of other in addition.
First kind, controller comprises reference circuit, comparison circuit and driver, and sensor and reference circuit are electrically connected with comparison circuit respectively, and the comparison circuit output then is electrically connected with actuator by driver, and reference circuit can be a kind of archival memory.Sensor signal enter in the comparison circuit with this database in signal compare, when the sampled signal of sensor (expression cabinet door open amount) identical with a certain data in this database or near the time, be triggered with the corresponding control signal of these data, control the actuator corresponding actions by driver, make the open amount of deciding the air quantity valve variation respective change because of this cabinet door open amount.
Second kind: controller comprises a kind of signal of telecommunication ratio converter, the sensor signal output is electrically connected with actuator by this signal of telecommunication ratio converter, signal of telecommunication ratio converter converts the signal of telecommunication of sensor output to a kind of signal of telecommunication that can be used as the actuator control signal according to the Mathematical Modeling ratio, and changes and change for actuator to control the open amount of deciding the corresponding cabinet door of air quantity valve valve opening amount this electrical signal transfer.
It can be a kind of blast volume controller that the concrete commercialization of this signal of telecommunication ratio converter is selected, and its model is ML7531A, and manufacturer is a U.S. Huo Biweier company.
The further concrete selection of sensor then can be a kind of variable resistance, the sliding end of this variable resistance and cabinet door mechanical connection.
Like this, along with the unlatching of cabinet door or close, the corresponding servo-actuated of variable resistance sliding end causes the variation of resistance value, thereby changes the voltage or the current value at these resistor two ends, so that the signal of telecommunication of a variation to be provided.
In sum, the utility model has following advantage compared to existing technology: the open amount action by the cabinet door links and decides the valve opening of air quantity valve, thereby make also respective change of the inside and outside negative pressure of cabinet door, when finally making cabinet Men Kaide big, negative pressure is also bigger, the also corresponding family of amount that causes outdoor airflow to be inhaled in the cabinet door is big, thereby guarantees that the air curtain flow velocity is in standard state all the time.In addition, the utility model is that the technical scheme that proposed of the above-mentioned effect of realization is enough simple again and be easy to industrialization, thereby strengthens the practicality of the technology of the present invention.
Description of drawings
Figure 1 shows that the structural representation of the utility model background technology;
Figure 2 shows that the structural representation of the utility model embodiment 1;
Figure 3 shows that embodiment 1 decides the structural representation of air quantity opening of valves amount automaton;
Figure 4 shows that the circuit frame schematic diagram of the utility model embodiment 2;
Figure 5 shows that the electrical block diagram of the utility model embodiment 2;
Figure 6 shows that the electrical block diagram of the utility model most preferred embodiment.
Below we are further described the utility model in conjunction with the accompanying drawings.
Specific embodiment
Embodiment 1:
With reference to Fig. 2, Biohazard Safety Equipment cabinet door air curtain device, comprise blower fan 1, operating room 2, exhaust passage 3, decide air quantity valve 4, decide air quantity opening of valves amount automaton 5, first air cleaner 6 and second air cleaner 7, wherein first air cleaner 6 is installed in the top of operating room 2, the air inlet of operating room 2 is positioned at 2 tops, operating room, and be communicated with the air outlet of blower fan 1 by first air cleaner 6, operating room's 2 exhaust outlets are positioned at 2 belows, operating room and are communicated with exhaust passage 3, operating room's 2 exhaust outlet openings are to cabinet door 21 inboards, and exhaust passage 3 orders are by the air outlet of blower fan 1, second air cleaner 7 is in communication with the outside with deciding air quantity valve 4, the output of deciding air quantity opening of valves amount automaton 5 is connected with the open amount control end of deciding air quantity valve 4, and the input of deciding air quantity opening of valves amount automaton 5 then is connected with cabinet door 21.
Like this, be divided into two-way after blower fan 1 air-out, a transportation work style enters operating room 2 by first air cleaner 6, and motion vertically downward, by exhaust outlet dusty gas is taken out of; In addition under 3 negative pressure of exhaust passage, outside air enters exhaust passage 3 by cabinet door 21, thereby formation air curtain device, the dusty gas that operating room 2 ejects and the extraneous gas that enters enter the air outlet of blower fan 1 by exhaust passage 3, are discharged to the external world with another transportation work style of blower fan 1 by second air cleaner 7.
With reference to Fig. 3, deciding air quantity opening of valves amount automaton 5 is a kind of mechanical driving devices, and cabinet door 21 is in transmission connection by this mechanical driving device and the open amount control end of deciding air quantity valve 4.This mechanical driving device is that a kind of hinge returns linkage, include first bar 51, second bar 52 and the 3rd bar 53, first bar 51 is connected with cabinet door 21, first bar 51 and second bar, 52 intersections are a kind of hinges 54, this hinge 54 is fixed on the cabinet, second bar 52 is also hinged by a kind of hinge 55 and the 3rd bar 53, and the 3rd bar 53 then is connected with the open amount control end of deciding air quantity valve 4.
It is same as the prior art that the utility model is not stated part.
Embodiment 2:
With reference to Fig. 4, deciding air quantity opening of valves amount automaton 5 is a kind of electronic automatic control devices, comprise sensor 51, controller 52 and actuator 53, sensor 51 signal output parts are electrically connected with actuator 53 by controller 52, and actuator 53 then is in transmission connection with the open amount control end of deciding air quantity valve 4.
Wherein, controller 52 comprises reference circuit 521, comparison circuit 522 and driver 523, and sensor 51 and reference circuit 521 are electrically connected with comparison circuit 522 respectively, and comparison circuit 522 outputs then are electrically connected with actuator 53 by driver 523.
With reference to Fig. 5, sensor 51 is the air velocity transducer of FFC-E for model, and it comprises a variable resistance, and the sliding end of this variable resistance is the wind speed controller 52 of FFC-F and being electrically connected with the air-valve actuator 53 of a stepper motor conduct by a model.Wherein, the wind speed controller 52 of FFC-F comprises that an analog-digital commutator is A/D converter, a PLD chip and an impulser, and reference circuit 521, comparison circuit 522 all are included in this PLD chip, and drive circuit 523 then is this impulser.Air velocity transducer transmits an analog signal and gives the wind speed controller, converts data signal to through the A/D converter of wind speed controller, handle by the PLD chip then, at last through the pulse transmitter with processing signals send to stepper motor as the air-valve actuator.
It is identical with embodiment 1 that present embodiment is not stated part.
Most preferred embodiment:
With reference to Fig. 6, controller 52 is a kind of signal of telecommunication ratio converters, and sensor 51 signal output parts are electrically connected with actuator 53 by this signal of telecommunication ratio converter.Signal of telecommunication ratio converter is a kind of blast volume controller, and its model is ML7531A.
It is identical with embodiment 2 that present embodiment is not stated part.
Claims (9)
1, Biohazard Safety Equipment cabinet door air curtain device, comprise blower fan (1), operating room (2) and exhaust passage (3), operating room (2) air inlet is positioned at top, operating room (2) and is communicated with blower fan (1) air outlet, operating room (2) exhaust outlet is positioned at below, operating room (2) and is communicated with exhaust passage (3), operating room (2) exhaust outlet opening is to cabinet door (21) inboard, it is characterized in that, also comprise and a kind ofly decide air quantity valve (4) and a kind ofly decide air quantity opening of valves amount automaton (5), exhaust passage logical (3) is crossed this and is decided air quantity valve (4) and be in communication with the outside, the output of deciding air quantity opening of valves amount automaton (5) is connected with the open amount control end of deciding air quantity valve (4), and the input of deciding air quantity opening of valves amount automaton (5) then is connected with cabinet door (21).
2, Biohazard Safety Equipment cabinet door air curtain device according to claim 1, it is characterized in that, deciding air quantity opening of valves amount automaton (5) is a kind of mechanical driving device, and cabinet door (21) is in transmission connection by this mechanical driving device and the open amount control end of deciding air quantity valve (4).
3, Biohazard Safety Equipment cabinet door air curtain device according to claim 2, it is characterized in that, mechanical driving device is that a kind of hinge returns linkage, include first bar (51), second bar (52) and the 3rd bar (53), first bar (51) is connected with cabinet door (21), first bar (51) is a kind of hinge (54) with second bar (52) intersection, this hinge (54) is fixed on the cabinet, second bar (52) is also hinged by a kind of hinge (55) and the 3rd bar (53), and the 3rd bar (53) then is connected with the open amount control end of deciding air quantity valve (4).
4, Biohazard Safety Equipment cabinet door air curtain device according to claim 1, it is characterized in that, deciding air quantity opening of valves amount automaton (5) is a kind of electronic automatic control device, comprise sensor (51), controller (52) and actuator (53), sensor (51) signal output part is electrically connected with actuator (53) by controller (52), and actuator (53) then is in transmission connection with the open amount control end of deciding air quantity valve (4).
5, Biohazard Safety Equipment cabinet door air curtain device according to claim 4, it is characterized in that, controller (52) comprises reference circuit (521), comparison circuit (522) and driver (523), sensor (51) and reference circuit (521) are electrically connected with comparison circuit (522) respectively, and comparison circuit (522) output then is electrically connected with actuator (53) by driver (523).
6, Biohazard Safety Equipment cabinet door air curtain device according to claim 5 is characterized in that reference circuit (521) can be a kind of archival memory.
7, Biohazard Safety Equipment cabinet door air curtain device according to claim 4 is characterized in that, controller (52) comprises a kind of signal of telecommunication ratio converter, and sensor (51) signal output part is electrically connected with actuator (53) by this signal of telecommunication ratio converter.
8, Biohazard Safety Equipment cabinet door air curtain device according to claim 7 is characterized in that signal of telecommunication ratio converter is a kind of blast volume controller, and its model is ML7531A.
9, Biohazard Safety Equipment cabinet door air curtain device according to claim 4 is characterized in that sensor (51) can be a kind of variable resistance, the sliding end of this variable resistance and cabinet door (21) mechanical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03220397 CN2608161Y (en) | 2003-03-13 | 2003-03-13 | Air screen curtain device of biological safety cabinet door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03220397 CN2608161Y (en) | 2003-03-13 | 2003-03-13 | Air screen curtain device of biological safety cabinet door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2608161Y true CN2608161Y (en) | 2004-03-31 |
Family
ID=34161872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03220397 Expired - Fee Related CN2608161Y (en) | 2003-03-13 | 2003-03-13 | Air screen curtain device of biological safety cabinet door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2608161Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224437B (en) * | 2006-12-20 | 2010-06-02 | 株式会社日立产机系统 | Safety cabinet |
| CN105268712A (en) * | 2015-11-24 | 2016-01-27 | 国网山东省电力公司烟台供电公司 | Intelligent dust preventing and removing isolation system |
| CN106196407A (en) * | 2016-08-31 | 2016-12-07 | 北京华逸飞科技发展有限公司 | A kind of air curtain apparatus, air curtain operating board and air curtain disinfection cabinet |
| CN113290011A (en) * | 2021-04-23 | 2021-08-24 | 宁波雪路登智能科技有限公司 | Fume chamber is used in laboratory with exhaust purification function |
| CN113757886A (en) * | 2021-09-23 | 2021-12-07 | 上海飞域实验室设备有限公司 | Air purification type exhaust cabinet with purification function |
-
2003
- 2003-03-13 CN CN 03220397 patent/CN2608161Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224437B (en) * | 2006-12-20 | 2010-06-02 | 株式会社日立产机系统 | Safety cabinet |
| US8163052B2 (en) | 2006-12-20 | 2012-04-24 | Hitachi Industrial Equipment Systems Co., Ltd. | Safety cabinet |
| US8382873B2 (en) | 2006-12-20 | 2013-02-26 | Hitachi Industrial Equipment Systems Co., Ltd. | Safety cabinet |
| US8728187B2 (en) | 2006-12-20 | 2014-05-20 | Hitachi Industrial Equipment Systems Co., Ltd. | Safety cabinet |
| CN105268712A (en) * | 2015-11-24 | 2016-01-27 | 国网山东省电力公司烟台供电公司 | Intelligent dust preventing and removing isolation system |
| CN106196407A (en) * | 2016-08-31 | 2016-12-07 | 北京华逸飞科技发展有限公司 | A kind of air curtain apparatus, air curtain operating board and air curtain disinfection cabinet |
| CN113290011A (en) * | 2021-04-23 | 2021-08-24 | 宁波雪路登智能科技有限公司 | Fume chamber is used in laboratory with exhaust purification function |
| CN113757886A (en) * | 2021-09-23 | 2021-12-07 | 上海飞域实验室设备有限公司 | Air purification type exhaust cabinet with purification function |
| CN113757886B (en) * | 2021-09-23 | 2022-10-14 | 上海飞域实验室设备有限公司 | Air purification type exhaust cabinet with purification function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |