CN207463783U - Vent cabinet - Google Patents
Vent cabinet Download PDFInfo
- Publication number
- CN207463783U CN207463783U CN201721303330.3U CN201721303330U CN207463783U CN 207463783 U CN207463783 U CN 207463783U CN 201721303330 U CN201721303330 U CN 201721303330U CN 207463783 U CN207463783 U CN 207463783U
- Authority
- CN
- China
- Prior art keywords
- cabinet
- wind
- supplying mouth
- air
- vent cabinet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model provides a kind of vent cabinet.The vent cabinet can be included in the cabinet (100) that front side is provided with opening (101), can also include exhaust outlet (201), mend wind passage (301), deflector (400).Wherein, exhaust outlet (201) is installed on cabinet (100) top side rearward, and mend wind passage (301) can include wind-supplying mouth (302)；Wind-supplying mouth (302) is installed on cabinet opening (101) lower edge, and deflector (400) is stood on rear side of cabinet (100) inner cavity, and multiple through holes (401) are provided on deflector (400).In addition, the side wall of cabinet (100) is hollow structure, mend wind passage (301) is connected along side wall with mending wind inlet (303) and wind-supplying mouth (302).Vent cabinet provided by the utility model can exclude security risk, prevent pernicious gas in cabinet from overflowing, while also have the characteristics that simple in structure, low manufacture cost.
Description
Technical field
The utility model is related to equipment more particularly to a kind of vent cabinets.
Background technology
Vent cabinet (also known as draught cupboard or laboratory hood) is built safe for capturing, accommodating, scavenging and pernicious gas
Working environment, preventing user of service from sucking exhaust gas or pernicious gas leads to life threatening, health.Traditional vent cabinet is by arranging
Air port connects exhaust fan or connects the wind output channel of exhaust outlet and the large-scale exhaust fan of building, utilizes air draft wind
Gas in vent cabinet working chamber is drained and surrounding air is introduced at the open front of vent cabinet by the swabbing action of machine, together
When with powerful wind turbine, air draft carries out the receiving and processing of harmful substance in air in working chamber.In tradition ventilation cabinet
Under design concept, the air quantity being sent into from open front is higher, and vent cabinet more has the control of harmful substance in air and discharge function
Effect, it is therefore desirable to by the heating ventilation air-conditioning system of building to the space for using the vent cabinet, such as laboratory, fill into a large amount of skies
Gas is replaced from the surrounding air for being pumped into vent cabinet working chamber.Since the air for filling into laboratory belongs to supply for laboratory
A part for surrounding air, it must be processed to identical surrounding air degree to ensure laboratory work environmental amenity
And safety, therefore, the building where the use of tradition ventilation cabinet generally results in laboratory etc. generates very big energy consumption.This
Outside, above-mentioned air flow frequently results in the generation vortex type air tissue near the exhaust outlet of vent cabinet, open front.
In this case, no matter the speed of air being sucked from open front is how many, if the air fluidic structures in working chamber have unrest
The air that stream and vortex will result in working chamber spills into the risk outside open front from vent cabinet working chamber, to experimenter's
Health and safety constitutes a threat to.
The patent document of Publication No. CN106140769A, air conditioning energy consumption can be reduced, inhibit working chamber by disclosing one kind
The overflow of interior harmful substance, and installation cost is low and vent cabinet that the consistency of product quality is high.Wherein, it discloses and mends wind system
The mend wind passage of system, the air-makeup system and building connects, and mends wind to the working chamber of vent cabinet, air-makeup system is on the top of cabinet
Respectively there is at least one wind-supplying mouth with lower part.In text it is also specifically disclosed that three wind-supplying mouths and corresponding position.As shown in Figure 1,
The first wind-supplying mouth A1 is equipped in the top of vent cabinet open front, the second wind-supplying mouth A2 is equipped in the lower section of open front, in cabinet
Top and the front side of above-mentioned antetheca are equipped with third wind-supplying mouth A3.
Although the vent cabinet has preferable energy-saving effect, it has also been found that there is following defects：When the vent cabinet works, row
Wind system is aspirated, and the gas in vent cabinet is blown by wind-supplying mouth along diagram hollow arrow flowing, air-makeup system and provides benefit
Fill air；Meanwhile the room air near the outer open front of vent cabinet is aspirated, being pumped into working chamber by open front becomes benefit
Fill air.At this point, when wind is mended in the wind-supplying mouth of top two or one of them offer, since air-flow is led in the suction of exhaust system
Draw and guiding of the benefit wind of air-makeup system to air-flow, mend between general mood stream and open front supplement air (circle in such as Fig. 1 above
Position shown in circle) small vortex can be formed, gas is not sucked into exhaust system in the presence of this small vortex is involved on a small quantity in cabinet
It may.If external at this time have interference air-flow to occur, for example someone passes by or the disengaging of the arm of operator, destroys small vortex
Balance, may cause the pernicious gas for being involved in small vortex to overflow on a small quantity.In addition, due to vent cabinet setting, there are three mend wind
Mouthful, cause production technology complicated, manufacture is of high cost；Meanwhile this vent cabinet needs the air output of accurately three wind-supplying mouths of control
The safety and energy-saving effect described in it are can be only achieved, this also proposes the control accuracy of air-makeup system very high requirement.
It is happy to put forth energy etc.《The research application of aircurtain exhaust hood》(University Of Nanhua's journal (science and engineering version):In March, 2002, the
The phase of volume 16 the 1st:The introducing push-pull airshutter technology on the basis of original laboratory hood 44-49) has been recorded in a text, has been developed a kind of new
Type push-pull airshutter formula laboratory hood (as shown in Figure 2), and it is energy saving to think that this New of Air cabinet has, operation is comfortable, control effect
The advantages of good.Wherein, 1 current collector is represented；2 represent pressure fan；3 represent balanced ventilation baffle；4 represent air outlet；5 represent air draft
Mouthful；6 represent lower air-breathing item seam；7 represent upper air-breathing item seam；8 represent run in wind turbine and exhaust disposal device.In fact, it is this according to
, the walking about of personnel, thermal convection current, air-conditioning very high for the environmental requirement residing for laboratory hood by the structure of air curtain partition internal and external environment
Crosscurrent etc. influences air curtain very big caused by blowing direction, indoor air supplying and exhausting system, and air curtain rupture may all be caused to be lost
Effect.Since air curtain is by proximal operator, once air curtain ruptures, the air curtain for carrying gas in cabinet instead easily damages to operator
The serious consequence of life and health.In addition, when operating personnel use above-mentioned aircurtain exhaust hood, the air-flow that air outlet is sent out is simultaneously
It is influenced to form air curtain by the push of air outlet and the suction of exhaust outlet.When operator uses this laboratory hood, arm necessarily passes through
Air curtain, at this point, air-supply air-flow from bottom to top, it is most likely that overflowed along the position of the lower lateral operator of operator's arm.
That is, in by cabinet after gaseous contamination, there is the possibility overflowed from laboratory hood, and due to sending out in the wind that air outlet is sent out
Wind direction be the nose for facing operator from bottom to top, once this vent cabinet air curtain rupture, the air meeting containing pollutant
The respiratory tract of operating personnel is fed directly into, causes very serious safety hazard.
Utility model content
The utility model embodiment can provide a kind of vent cabinet, can exclude security risk, prevent pernicious gas in cabinet
It overflows, while also there is simple in structure, low manufacture cost.
The utility model embodiment provides a kind of vent cabinet, and the cabinet of opening is provided with including front side, is further included：
The exhaust outlet in cabinet is connected, exhaust outlet, which is set at the top of cabinet, leans on rear side；
Mend wind passage including wind-supplying mouth；And
Stand in cabinet and lean on the deflector of rear side, deflector includes substrate and rake, substrate lower end and bottom of cabinet bulk it
Between, between rake lower end and substrate there are gap,
Wherein,
Wind-supplying mouth is located at opening lower section, and rake is set as its front end and covers exhaust outlet when seeing from below.
Preferably, in terms of front side, the center of exhaust outlet is located at the centre of the left and right sides in cabinet；Side is seen from the left or right, row
The center in air port is located in cabinet by rear side.
Preferably, side is seen from the left or right, the center of exhaust outlet be located in cabinet between front and rear side and away from rear side a quarter at.
Preferably, in terms of front side, the width of wind-supplying mouth is greater than or equal to the width of cabinet, makes wind-supplying mouth to opening left and right two
End extends and covers opening.
Preferably, side is seen from the left or right, and arc-shaped connection or chamfering connection, make benefit between the top side of wind-supplying mouth and rear side
It upwardly and rearwardly blows in air port.
Further, arc is quadrant arc.
Preferably, be located in same perpendicular with cabinet front inner on the outside of wind-supplying mouth, make through wind-supplying mouth send out to
On benefit general mood stream covering cabinet opening.
Preferably, be equipped with guide plate in wind-supplying mouth, guide plate wind-supplying mouth is separated into the outside wind-supplying mouth that points up and
The inside wind-supplying mouth being directed toward in cabinet.
Further, the cross section of guide plate is arc-shaped, for guiding the benefit wind airflow direction sent out through inside wind-supplying mouth.
Further, guide plate lower end is located in mend wind passage, and lower end is used for distributing outside wind-supplying mouth and inside is mended
The benefit wind air quantity in air port.
Preferably, deflector substrate is equipped with through hole, and through hole is uniformly distributed along horizontal width direction, from down to up its
Hole area is gradually reduced relative to the accounting of unit area.
Preferably, its mutual spacing is gradually increased through hole from down to up or, the hole area of through hole gradually subtracts
It is small.
Further, in terms of front side, the through hole for being set to deflector substrate is up-narrow and down-wide, radial arrangement.
Further, deflector substrate further includes deflector top and deflector lower part, deflector lower part on deflector
There are gaps between portion.
Preferably, front side top is equipped with hang plate in cabinet；The upward extending direction of hang plate and rake are upward to be prolonged
Direction shape is stretched to have angle.
Preferably, the benefit wind wind turbine connected with mend wind passage is further included, it is adjustable power type wind turbine to mend wind wind turbine.
Further, wind wind turbine is mended to be set in mend wind passage.
Preferably, the benefit air valve connected with mend wind passage is further included, benefit air valve is aperture type variable valve.
Preferably, vent cabinet side wall and/or lower wall are hollow structure, and mend wind passage is set on the side wall and/or lower wall of cabinet.
Preferably, it further includes：
The sliding door of opening is located at, sliding door can be slided along opening, for adjusting the open area of opening；And
Bottom passageway, bottom passageway will outside connect in cabinet with cabinet, and bottom passageway outlet is located in cabinet,
Wherein, vent cabinet is set as when exhaust outlet air draft, 40%~69% air-flow sent out by wind-supplying mouth of exhaust air rate
Supplement.
Preferably, wind-supplying mouth lateral wall and sliding door lateral wall are located in same perpendicular, make through wind-supplying mouth send out to
On benefit general mood stream covering cabinet opening.
Further, it further includes：
Position sensor, for detecting the position of sliding door；And
The control unit being connect with position sensor,
Wherein, guide plate further includes adjustable plate, and adjustable plate is hinged with guide plate, and control unit is according to the inspection of position sensor
Measurement information controls to adjust plate rotation, and the air quantity for adjusting the inside wind-supplying mouth separated by guide plate and outside wind-supplying mouth divides
Match.
The utility model embodiment also provides the control method of above-mentioned vent cabinet, including：
When it is 0%~4% that sliding door movement, which leads to opening aperture, adjustable plate free end is set as connecing with mend wind passage bottom plate
It touches, that is, closes outside wind-supplying mouth；
When it is 5%~60% that sliding door movement, which leads to opening aperture, adjustable plate free end is set as and mend wind passage bottom plate
Distance be less than or equal to mend wind passage height 40%；
When it is 61%~100% that sliding door movement, which leads to opening aperture, adjustable plate free end is set as and mend wind passage bottom
The distance of plate is less than or equal to the 70% of mend wind passage height.
Further, when vent cabinet air draft, the 40%~69% of exhaust air rate is supplemented by the air-flow that wind-supplying mouth is sent out.
According to the vent cabinet that the utility model embodiment provides, all air draft air-flows being discharged to other than vent cabinet are eliminated
All by the active supplemental air flow of air-makeup system or all by cabinet outside the security risk supplemented of passive supplemental air flow, pass through
Only cabinet opening below wind-supplying mouth is set, and control exhaust air rate, actively mend air quantity and passively benefit air quantity (refer to when exhaust system from
In vent cabinet during air draft, the surrounding air other than vent cabinet is influenced to enter the gas in vent cabinet by the negative pressure that air draft is formed
Stream) mutual ratio, the opening of vent cabinet is made to be formed always towards the one-way gas flow of exhaust outlet in cabinet, so as to
Ensure the safety of user, pernicious gas in cabinet is effectively prevent to overflow.In addition, relative to three wind-supplying mouths are set in the prior art
When need the air outputs of accurately three wind-supplying mouths of control, otherwise once disequilibrium effect and safety with regard to lossy risk,
The utility model is due to only setting a wind-supplying mouth, and more simple in structure relative to multiple wind-supplying mouths, production cost is lower,
Further increase safety coefficient.
Description of the drawings
Fig. 1 shows a kind of vent cabinet of the prior art；
Fig. 2 shows another laboratory hoods of the prior art；
Fig. 3 is the structure diagram of vent cabinet that one embodiment of the utility model provides；
Fig. 4 is the vertical view of structure diagram shown in Fig. 3；
Fig. 5 is wind-supplying mouth cross-sectional view；
Fig. 6 is the wind-supplying mouth cross-sectional view of vent cabinet that another embodiment of the utility model provides；
Fig. 7 is the deflector structure schematic diagram of vent cabinet that one embodiment of the utility model provides；
Fig. 8 is the structure diagram of vent cabinet that another embodiment of the utility model provides；
Fig. 9 is the dimensional structure diagram of vent cabinet that another embodiment of the utility model provides；
Figure 10-1 to Figure 10-3 shows the Boiler pressure control state signal for the vent cabinet that one embodiment of the utility model provides
Figure；
Figure 11-1 and Figure 11-2 is the vent cabinet Q that the utility model embodiment providesIt mends=40% × QRowWhen slip detect
Figure stereogram and side view；
Figure 11-3 and Figure 11-4 is the vent cabinet Q that the utility model embodiment providesIt mends=40% × QRowWhen air velocity stream
Line chart and air velocity sectional drawing；
Figure 12-1 and Figure 12-2 is the vent cabinet Q that the utility model embodiment providesIt mends=45% × QRowWhen slip detect
Figure stereogram and side view；
Figure 12-3 and Figure 12-4 is the vent cabinet Q that the utility model embodiment providesIt mends=45% × QRowWhen air velocity stream
Line chart and air velocity sectional drawing；
Figure 13-1 and Figure 13-2 is the vent cabinet Q that the utility model embodiment providesIt mends=60% × QRowWhen slip detect
Figure stereogram and side view；
Figure 13-3 and Figure 13-4 is the vent cabinet Q that the utility model embodiment providesIt mends=60% × QRowWhen air velocity stream
Line chart and air velocity sectional drawing；
Figure 14-1 and Figure 14-2 is the vent cabinet Q that the utility model embodiment providesIt mends=69% × QRowWhen slip detect
Figure stereogram and side view；
Figure 14-3 and Figure 14-4 is the vent cabinet Q that the utility model embodiment providesIt mends=69% × QRowWhen air velocity stream
Line chart and air velocity sectional drawing；
Figure 15-1 and Figure 15-2 is the vent cabinet Q that the utility model embodiment providesIt mends=70% × QRowWhen slip detect
Figure stereogram and side view；
Figure 15-3 and Figure 15-4 is the vent cabinet Q that the utility model embodiment providesIt mends=70% × QRowWhen air velocity stream
Line chart and air velocity sectional drawing.
Specific embodiment
Presently in connection with attached drawing, the better embodiment of the utility model is discussed in detail.Although the description of the utility model will
It is introduced together with reference to this better embodiment, but this feature for not representing this utility model is only limitted to the embodiment.Exactly
On the contrary, it is that had based on the claim of the utility model can in order to cover with reference to the purpose that embodiment makees utility model introduction
The other selections or transformation that can extend.In order to provide the depth understanding to the utility model, many will be included in being described below
Concrete details.The utility model can not also be implemented using these details.In addition, in order to avoid this chaotic or fuzzy practicality is new
The emphasis of type, some details will be omitted in the de-scription.
In addition, used in the following description " on ", " under ", "left", "right", " top ", " bottom ", "front", "rear",
The orientation words such as " interior ", " outer ", be based on the vent cabinet by laboratory experimenter's use when spatial position and define,
It should not be construed as a limitation of the present invention.
Fig. 3 is the structure diagram of vent cabinet that one embodiment of the utility model provides.As shown in figure 3, the vent cabinet can
To be included in cabinet 100, exhaust outlet 201, mend wind passage 301, the deflector 400 that front side is provided with opening 101.Wherein, cabinet is connected
Exhaust outlet 201 in body 100 is set to 100 top of cabinet by rear side.Mend wind passage 301 can include wind-supplying mouth 302, wherein,
Wind-supplying mouth 302 is set to 101 lower section of cabinet opening, and mend wind passage 301 is set to 100 bottom of cabinet.Deflector 400 stands on cabinet
By rear side in body 100, including substrate and rake 404, wherein substrate is set up vertically, and rake 404 is located at the upper of substrate
Side, and tilted from bottom to up towards the direction of exhaust outlet 201；The upper end of rake 404 is leaned on close to the top of cabinet 100, lower end
Nearly substrate, and there are gaps 405 before with 100 top of cabinet close to the end at 100 top of cabinet for rake 404；In bottom view
On, rake 404 covers exhaust outlet 201, and as shown in Figure 3, rake 404 is set as its front end and covers air draft when seeing from below
Mouth 201.Moreover, it between 100 bottom of deflector substrate and cabinet, between rake 404 and substrate there are gap 405 or sets
Hole is equipped with, air-flow to be allowed to pass through at gap 405 or hole.
Air draft refers to discharge gas in cabinet out of vent cabinet.It is all in vent cabinet in the utility model embodiment
Gas is discharged via exhaust outlet 201.When the vent cabinet air draft that the utility model embodiment provides, make-up gas passes through following
Two kinds of approach are added in cabinet：One kind is actively to mend wind, i.e., make-up gas is actively sent into cabinet by air-makeup system；Another kind is
Passive to mend wind, i.e., the negative pressure that make-up gas is formed by air draft is influenced to be inhaled into or is pumped into cabinet.In working condition, exhaust air rate
Equilibrium state, i.e. exhaust air rate (Q are in air quantity is mendedRow)=mend air quantity=actively mend air quantity (QIt mends)+passively mends air quantity (QIt inhales)。
Vent cabinet provided in this embodiment, exhaust outlet 201 can with the exhaust system in laboratory where external vent cabinet or
The exhaust system of building where external vent cabinet is drained into the gas most at last in vent cabinet outside laboratory or outside building；
Similarly, mend wind passage 301 can be with building where the air-makeup system in laboratory where external vent cabinet or external vent cabinet
Air-makeup system.When vent cabinet works, under the action of said exhaust system, the gas in vent cabinet passes through exhaust outlet 201
Discharge, so as to generate negative pressure in the cabinet 100 of vent cabinet；Meanwhile under the action of above-mentioned air-makeup system, extraneous fresh air
It is sent in cabinet along mend wind passage 301 through being located at the wind-supplying mouth 302 of 101 lower section of the opening of cabinet 100, is formed and mend general mood stream.One
General mood stream is mended under the swabbing action of exhaust system in part, carries gas or particulate matter in cabinet and is disposed through 400 base of deflector
The gap 405 between 400 substrate of gap, rake 404 and deflector between 100 bottom of plate and cabinet, along 400 He of deflector
Channel between 100 rear wall of cabinet reaches exhaust outlet 201, finally drains into exhaust system through exhaust outlet 201；Another part mends wind
Air-flow is influenced by air draft negative pressure, and gas or particulate matter are carried in cabinet after being sent from wind-supplying mouth 302 directly up and is flowed backward
Vent cabinet is discharged after exhaust outlet 201.At this point, mend the benefit that wind air current flow is set to less than air draft air quantity, actively supplement
General mood stream is not enough to fill the space that gas leaves in former cabinet, thus at the opening of cabinet 100 101 around cabinet outside air
Also influenced by exhaust system suction, but by the benefit general mood stream sent out from wind-supplying mouth 302 sweep along and with to mend general mood stream passive together
It is flowed to exhaust outlet 201.Under above-mentioned arrangement, by entering the passive general mood stream of mending in cabinet 100 outside cabinet 100 in opening 101
Place forms the one-way gas flow of ecto-entad, and cabinet is spilt at the opening of cabinet 100 101 so as to ensure not have gas in cabinet
Other than 100.
Therefore, vent cabinet provided in this embodiment provides the only wind-supplying mouth 302 for actively mending wind into cabinet 100, so as to
Make actively to mend wind air quantity and air draft air quantity forms QIt mends=(40%~69%) × QRowRelationship；Wherein, QIt mendsFor via wind-supplying mouth
302 actively mend wind air quantity, QRowFor the air draft air quantity discharged via exhaust outlet 201.
When vent cabinet works, working region when in cabinet 100 as the progress chemical experiment of experimenter has
Grain object generates, these particulate matters are likely to be harmful.When exhaust system works, taken out to being formed in cabinet 100
It inhales, draw is formed to above-mentioned particulate matter, can be visually known as " drawing "；When air-makeup system works, from wind-supplying mouth 302
The benefit general mood stream of submitting, can push particulate matter to be moved with air current flow direction, can be visually known as " pushing away ".
Fig. 4 is the vertical view of structure diagram shown in Fig. 3.Wherein, 510 width direction is represented；520 represent length direction.
As shown in figure 4, in the present embodiment, exhaust outlet 201 is cylindrical, it is installed in one of 100 top of cabinet far from opening 101
Side, i.e., side is seen from the left or right, and the center of exhaust outlet 201 is located in cabinet 100 by rear side；And center axis is in width direction
On or close to 100 middle of cabinet on 510, i.e., in terms of front side, the center of exhaust outlet 201 is located at left and right two in cabinet 100
The centre position of side.As shown in figure 4, A is the width of vent cabinet cabinet 100, the center of exhaust outlet 201 to left and right of vent cabinet
Half of the distance of side for 100 width of vent cabinet cabinet, i.e. A/2.In other embodiments, in order to preferably and cabinet
Exhaust outlet 201 can also be arranged on the centre in cabinet 100, i.e., by 201 center of exhaust outlet to cabinet by interference fit in 100
The distance of either side is the half of 100 insied width of vent cabinet cabinet in 100.Such setting can make exhaust outlet 201 high
Efficient play air draft effect.
In another embodiment of the utility model, 201 central axis of exhaust outlet on length direction 520 in cabinet 100
A quarter of the distance of rear wall for length in cabinet 100, i.e., side is seen from the left or right, and the center of exhaust outlet 201 is located at cabinet 100
At between interior front and rear side and away from rear side a quarter.Such positioning, conducive to the effect of exhaust blower realization " drawing " is realized, and can make
Steady air current and be less prone to sinuous flow.
As shown in figure 3,302 outside of wind-supplying mouth is located at 100 front inner of cabinet in same perpendicular.Such setting
It can make the benefit general mood stream sent out through wind-supplying mouth 302, especially upward benefit general mood stream covering cabinet opening 101.In this implementation
In example, wind-supplying mouth 302 extends in the direction of the width along cabinet 100, and in terms of front side, width is equal to or more than left in cabinet 100
Width between right side makes 101 left and right ends of benefit general mood flow direction opening that wind-supplying mouth 302 is sent out extend and cover opening 101.By
Shown in Fig. 3, wind-supplying mouth 302 it is arc-shaped perpendicular to the cross section of width direction, i.e., the top side of wind-supplying mouth 302 is seen in side from the left or right
The arc-shaped connection between rear side；Wind-supplying mouth 302 upward and rear, makes the benefit wind sent out by wind-supplying mouth 302 upward
In cabinet 100.In other embodiments, 302 cross section of wind-supplying mouth can also be in quadrant arc.
Fig. 5 is wind-supplying mouth cross-sectional view.As shown in figure 5, in the present embodiment, guide plate is equipped in wind-supplying mouth 302
310, wind-supplying mouth 302 is separated into outside wind-supplying mouth 311 and inside wind-supplying mouth 312 by guide plate 310.In addition, guide plate 310
It is arc-shaped perpendicular to the cross section of width direction, for guiding the benefit wind airflow direction that inside wind-supplying mouth 312 is sent out.In other realities
It applies in example, guide plate 310 can also be in inverted L-shaped or sickle-shaped.Preferably, guide plate 310 is in the horizontal direction substantially by wind-supplying mouth
302 are divided into two parts of area equation.310 lower end 313 of guide plate is located in mend wind passage 301.Those skilled in the art can
To understand, the benefit wind allocation of the amount of air of outside wind-supplying mouth 311, inside wind-supplying mouth 312 can be controlled by adjusting the position of lower end 313.
Therefore, the effect of guide plate 310 is to change wind direction, distribution air quantity.
When vent cabinet provided in this embodiment works, general mood stream is mended after mend wind passage 301, is divided by guide plate 310
Inside wind-supplying mouth 312 and outside wind-supplying mouth 311 are flowed to respectively into two strands of air-flows.The ratio of medial and lateral wind-supplying mouth allocation of the amount of air by
The decision of the distance between 310 lower end of guide plate and 301 bottom plate of mend wind passage.The distance is bigger, the air quantity of outside wind-supplying mouth 311
(QIt mends outer) it is bigger, then inside wind-supplying mouth 312 air quantity (QIn benefit) smaller；Conversely, this is apart from smaller, then outside 311 air quantity of wind-supplying mouth
(QIt mends outer) smaller, 312 air quantity (Q of inside wind-supplying mouthIn benefit) bigger；Mend wind air quantity QIt mends=QIn benefit+QIt mends outer.Outside wind-supplying mouth 311 formed to
On air curtain, reduce indoor influence of the disturbance to 100 interior air-flow tissue of cabinet of experiment；The benefit sent out from inside wind-supplying mouth 312
Wind " pushes away ", and " push-and-pull " is collectively formed in exhaust system " drawing ", the two, by pernicious gas send to deflector 400 and 100 rear wall of cabinet it
Between, finally taken away by exhaust system.By the swabbing action of exhaust system, can be formed between deflector 400 and the rear wall of cabinet 100
" diversion trench ", air are impossible to after being trapped in " diversion trench " again to the flowing of 101 directions of opening, so as to thoroughly from exhaust outlet
Discharge ensures safety.
Guide plate 310 in the present embodiment, due to can be formed when playing guiding role to the air-flow flowed through in certain directions
Limitation, causes stream pressure centainly to lose, when being designed to arc, causes the pressure loss for flowing through air-flow small.
Fig. 6 is 302 cross-sectional view of wind-supplying mouth of vent cabinet that another embodiment of the utility model provides.As schemed
Show, the cross section vertical with width direction of wind-supplying mouth 302 can also chamfered shape, i.e., side is seen from the left or right, wind-supplying mouth 302
Chamfered shape connection between top side and rear side.
Fig. 7 is the deflector structure schematic diagram of vent cabinet that one embodiment of the utility model provides.As shown in fig. 7, it is preferred that
Ground, deflector 400 are equipped with multiple through holes 401, and the through hole 401 positioned at deflector lower part 402 is equal along horizontal width direction
Even distribution；Its hole area gradually subtracts through hole 401 positioned at deflector top 403 relative to the accounting of unit area from down to up
It is small.
In other embodiments, be set to the through hole 401 on deflector top 403 from down to up its mutual spacing by
It gradually increases, the hole area of the gradual sparse or, single through hole 401 of arrangement is gradually reduced.In another embodiment, it is set to and leads
The arrangement of the through hole 401 on flowing plate top 403 in the direction of the width from top to bottom is radial in center, i.e., in terms of front side, runs through
The arrangement in hole 401 is along center in up-narrow and down-wide.
In the present embodiment, deflector lower part 402 and deflector top 403 are wholely set, and form deflector substrate；Run through
Arrangement of the hole 401 on deflector substrate, with the arrangement on its deflector top 403 and deflector lower part 402.In other implementations
In example, deflector top 403 and deflector lower part 402 can also be provided separately.No matter deflector top 403 and deflector lower part
Whether 402 be provided separately, there are gap 405 preferably between deflector lower part 402 and deflector top 403, to allow air-flow
It is influenced by the negative pressure that exhaust outlet 201 is formed between 100 rear wall of deflector 400 and cabinet, is worn along gap 405 or through hole 401
Deflector 400 is crossed, to have the function that control air flow direction.When vent cabinet provided in this embodiment works, inside wind-supplying mouth
312 push the higher pollutant of concentration to deflector lower part 402 by the positive static pressure of air-supply with kinetic energy, and pollutant passes through deflector
It is siphoned away behind lower part 402 by negative pressure channel behind；Outside wind-supplying mouth 311 generates one section of air curtain vertically upward, partition opening
Air-flow inside and outside 101 prevents human body generates before disturbance or the cabinet outside cabinet " peripheral flow effect " from being generated to 100 internal gas flow of cabinet
It influences.
So-called " peripheral flow ", refer to fluid around cylinder flow when, flow section is shunk, and flow velocity is along Cheng Zengjia, pressure
Reduce along journey, due to the presence of viscous force, the separation in boundary layer will occur around cylinder, form peripheral flow.
Partly in the prior art, vent cabinet is designed to only passively mend wind in air draft, all discharge gases
It is passively supplemented by the air come from outside cabinet and Jing Guo opening, that is to say, that all benefit general mood streams are both needed to ecto-entad
Opening is flowed through to be pumped into cabinet.At this moment, any physics at opening section or before opening is hindered and is interfered, such as personnel
Walk about before opening, operating personnel stop opening or be placed in opening before instrument, can all lead to the steady of cabinet interior air-flow tissue
It is qualitative to be destroyed, it causes " peripheral flow effect ".The stability of cabinet interior air-flow tissue will generate turbulent flow, meeting after being destroyed
Cause to generate the risk in cabinet outside gas overflowing to cabinet.
Fig. 8 is the structure diagram of vent cabinet that another embodiment of the utility model provides.As shown in figures 3 and 8, water conservancy diversion
On plate 400 rake 404 being connect with deflector top 403, rake 404 and water conservancy diversion are additionally provided at 100 roof of cabinet
There are gaps 405 between plate top 403.As shown in figure 8, the top of vent cabinet inner opening 101 is equipped with hang plate 104；Hang plate
104 upward extending directions and the upward extending direction shape of rake 404 have angle (not shown).
In general, the vent cabinet in running order, pollution sources are typically placed in bottom end face in cabinet 100, such as
Beaker, heating magnetic stirring apparatus etc., therefore distribution of the concentration in vent cabinet inner height direction of pollutant is in cabinet 100：Away from
Higher from the nearlyer concentration in bottom in cabinet 100, more remote (such as 100 inner top of the cabinet) concentration in bottom is lower in cabinet 100.This
Embodiment provide vent cabinet in Airflow Pattern Designing theory be：
1. by rationally setting gap size between 100 bottom of deflector lower part 402 and cabinet and set on deflector
The size of the sum of the hole area of multiple through holes 401 on lower part 402 accounts for row via the air quantity discharged to exhaust outlet 201 herein
The 60% of air quantity；
2. by rationally setting between deflector top 403 and deflector lower part 402 size in gap and set on water conservancy diversion
The size of the sum of the hole area of multiple through holes 401 on plate top 403 is accounted for via the air quantity discharged to exhaust outlet 201 herein
The 25%~30% of exhaust air rate；
3. by rationally set the gap between the rake 404 of deflector 400 and deflector top 403 size and
The size in the gap between 100 top of rake 404 and cabinet, exhaust air rate is accounted for via the air quantity discharged to exhaust outlet 201 herein
10%~15%；
Because of fluid mechanics principle, at exhaust outlet 201, negative pressure is bigger.Deflector lower part far from exhaust outlet 201
402 pressure losses generated due to on-way resistance, negative pressure are relatively small.
The design of deflector 400 needs to follow requirements above, and meet following characteristics：
1. 401 trepanning of through hole on deflector lower part 402 is larger or more intensive, the air-flow for meeting 60% exhaust air rate leads to
Cross demand.Its position of opening can ensure uniform by the face wind speed of deflector lower part 402 in width direction simultaneously.
2. 401 trepanning of through hole on deflector top 403 is from top to bottom, single perforated area is less and less, row and row
Between arrange increasingly dredge, often row the number of openings is fewer and fewer, with ensure into deflector 400 air quantity successively decrease from lower to upper will
It asks.
3. 400 rake 404 of deflector with 100 inner top of cabinet and with deflector top 403 will there are gaps 405.It is empty
405 size of gap can be by CFD (english abbreviation of computational fluid dynamics Computational Fluid Dynamics) fluid
Analysis obtains.Excessive gap can cause pollutant to circumvent deflector top 403 and deflector lower part 402 directly to rise to top
Portion forms turbulent flow at top, increases the risk spilt into outside cabinet 100.
In another embodiment of the utility model, mend wind passage 301, which is also communicated with, mends wind wind turbine, which is power
Adjustable type wind turbine.In other embodiments, mending wind wind turbine can also be set in mend wind passage 301.Further, mend wind passage
301 can also connect benefit air valve, and it can be aperture type variable valve to mend air valve.
In another embodiment of the utility model, vent cabinet lower wall is hollow structure, and mend wind passage 301 is set on the cabinet
100 lower wall.In addition, 100 roof of cabinet can also be hollow structure.Therefore, mend wind passage 301 similarly can be to pass through cabinet
Roof, the lower wall of body 100.In other embodiments, in hollow structure again effective sealing roof, lower wall, side wall, itself
It can be used as mend wind passage 301.
Fig. 9 is the dimensional structure diagram of vent cabinet that another embodiment of the utility model provides.As shown in figure 9, the reality
The vent cabinet of example offer is provided, further includes the sliding door 106 being located at opening 101, sliding door 106 can be slided along opening 101, for adjusting
The open area of opening 101；Vent cabinet further includes bottom passageway 105, and bottom passageway 105 will connect in cabinet 100 with external environment
Logical, 105 one end of bottom passageway is set on outside cabinet 100,100 top of cabinet can be arranged on, as entrance；The other end is set on cabinet
In 100, as outlet.In addition, 302 lateral wall of wind-supplying mouth is located at 106 lateral wall of sliding door in same perpendicular, make through mending wind
The benefit general mood streams that mouth 302 is sent out, especially upward benefit general mood stream covering cabinet opening 101.In other embodiments, in order to make
Sliding door 106 it is smooth relative to the slip of cabinet 100, often there are larger gaps between sliding door 106 and cabinet 100.Cause
This controls the gap to play one of the effect of bottom passageway 105 and optional technological means, and benefit is need not be independent
Bottom passageway 105 is set, simplifies structure.
When vent cabinet provided in this embodiment works, bottom passageway 105 is located at the gas of 100 outer adjacent one end of cabinet,
It is influenced by 201 suction of exhaust outlet, by bottom passageway 105 or is equivalent to the region of bottom passageway outside vent cabinet and enters in cabinet,
For eliminating the polluted gas for being likely to be present in top in cabinet 100 and leaning on front side.At this point, bottom passageway 105 is controlled as to cabinet
Interior provide is equivalent to 5%~10% small scale of exhaust air rate and passively mends wind air quantity, you can ensures larger to polluted gas
Shut off ability, eliminate polluted gas in cabinet and overflow risk outside cabinet, and without additional wind turbine by bottom passageway 105 to cabinet
Interior air-supply.
From the perspective of from another angle, the setting of bottom passageway 105 is the means as a stable cabinet internal gas flow tissue.
The internal physical structure of vent cabinet determines can generally generate vortex at 100 top of cabinet close to the position of opening 101, and be located at
Air in vortex is difficult to be discharged.Bottom passageway 105 is set so that is aspirated into cabinet 100 by bottom passageway 105
Above-mentioned vortex is destroyed and " pushes " gas for forming vortex to deflector 400 and exhaust outlet 201 by interior air, so as to prevent cabinet
Interior gas overflows at opening 101, makes vent cabinet safer.It will be understood by those skilled in the art that above-mentioned generation vortex
Position is just close to stand before cabinet opening 101 at the mouth and nose of operating personnel, therefore it is most dangerous for there is vortex in this position
, especially when sliding door 106 in the open state.
By the design to cabinet of divulging information, for example adjust 310 lower end 313 of guide plate and be located at mend wind passage 301
In position or adjust sliding door 106 height, when vent cabinet provided in this embodiment work, wherein benefit air quantity 40%~
69% is provided by wind-supplying mouth 302, remaining 31%~60% is provided otherwise.Such as in the present embodiment, wind air quantity is mended
31%~60% by cabinet door opening 101 and bottom passageway 105 jointly provide.Optimum state is that air volume adjustment ratio is：
QIt mends=60% × QRow；
QDoor=30% × QRow；
QIt is other=10% × QRow；
QIt inhales=QDoor+QIt is other。
Wherein, QRowFor exhaust air rate, QIt mendsWind air quantity, Q are actively mended for what is sent out via wind-supplying mouth 302DoorFor outside cabinet 100
Passive benefit wind air quantity through being drawn at opening 101 in cabinet 100, QIt is otherTo be drawn into from cabinet 100 is outer through bottom passageway 105
The passive of cabinet 100 mends wind air quantity.
In this way, what the pollutant that experiment generates was formed by deflector 400 and deflector 400 with rear wall in cabinet 100
Negative pressure channel is pumped from exhaust outlet 201.
1. when the occurrence quantity of pollutant is small or medium volume, pollutant is directly taken away from deflector lower part 402；
2. when pollutant volume is a large amount of, pollutant is pumped from deflector lower part 402 and deflector top 403
3. when pollutant volume is very large amount, the dirt that is not pumped via deflector lower part 402 and deflector top 403
Dye object rises to top, is taken away via the gap up and down of the rake 404 of deflector 400.
In the above-described embodiments, the distribution for mending wind air quantity can be controlled by the position of 310 lower end 313 of guide plate.
In other embodiments, it can also can be turned by an adjustable plate 314 hinged on guide plate 310, adjustable plate 314 around articulated section
Dynamic, close articulated section is fixing end on adjustable plate 314, and the other end is free end.In this way, by controlling to adjust plate 314 freely
The position at end can also reach the function that wind allocation of the amount of air is mended in control.Furthermore it is also possible to by other machinery structure, such as shrapnel
Collision bead structure, connection adjustable plate 314 and sliding door 106, to realize the position tune of the shift in position of sliding door 106 triggering adjustable plate 314
It is whole.
Figure 10-1 to Figure 10-3 is the Boiler pressure control status diagram of vent cabinet that one embodiment of the utility model provides.Such as
Shown in figure, C is the distance between 314 free end of adjustable plate and 301 lower plate of mend wind passage；D is 106 lower end of sliding door with mending wind
The distance of mouth 302.3 working conditions that vent cabinet uses are generally：
1. 106 closed state of sliding door tests non-operating state or without supervising experiment.The movement of sliding door 106 at this time leads to cabinet
Body 100 be open 101 apertures be 0%~4%, 314 free end of adjustable plate be set as with 301 contacts baseplate of mend wind passage, that is, close
Outside wind-supplying mouth 311, QIt mends=QIn benefit；
2. 106 aperture of sliding door is 5%~60%, experimenter needs to carry out experimental implementation in cabinet.Adjustable plate 314 at this time
Free end is set as and 40% of the distance of 301 bottom plate of mend wind passage for 301 height of mend wind passage, in this case, QIt mends outer=
40% × QIt mends, QIn benefit=60% × QIt mends；
3. 106 full-gear of sliding door is normally present the behavior that experimenter highly carries out experimental implementation herein, adjusts
314 free end of plate be set as with the distance of 301 bottom plate of mend wind passage be 301 height of mend wind passage 70%, in this case,
QIt mends outer=70% × QIt mends, QIn benefit=30% × QIt mends。
By Figure 10-1 to Figure 10-3, the controlling party for illustrating the vent cabinet that one embodiment of the utility model provides can be used for
Method.The vent cabinet that the embodiment provides can be further ensured that safety, prevent from being harmful to gas in cabinet by accurately automatically controlling
Body overflows.
In this embodiment, vent cabinet further includes：
Position sensor, for detecting the position of the sliding door 106；And
The control unit being electrically connected with position sensor,
Wherein, guide plate 310 further includes adjustable plate 314, and adjustable plate 314 is hinged with guide plate 310.It works in the embodiment
When, control unit controls to adjust plate 314 and turns an angle, for adjusting by being oriented to according to the detection information of position sensor
The allocation of the amount of air of medial and lateral wind-supplying mouth that plate 310 separates.
As shown in Figure 10-2 to Figure 10-3, C is the distance between 314 free end of adjustable plate and 301 lower plate of mend wind passage；
D is 106 lower end of sliding door and the distance of wind-supplying mouth 302.
The control method of the present embodiment controls respectively according to following working condition, 3 working conditions one that vent cabinet uses
As be：
1. 106 closed state of sliding door tests non-operating state or without supervising experiment.The movement of sliding door 106 at this time leads to cabinet
Body 100 be open 101 apertures be 0%~4%, 314 free end of adjustable plate be set as with 301 contacts baseplate of mend wind passage, that is, close
Outside wind-supplying mouth 311, QIt mends=QIn benefit；
2. 106 aperture of sliding door is 5%~60%, experimenter needs to carry out experimental implementation in cabinet.Adjustable plate 314 at this time
40%, the Q that free end is set as with the distance of 301 bottom plate of mend wind passage is 301 height of mend wind passageIt mends outer=40% × QIt mends, QIn benefit
=60% × QIt mends；
3. 106 full-gear of sliding door is normally present the behavior that experimenter highly carries out experimental implementation herein, adjusts
70%, the Q that 314 free end of plate is set as with the distance of 301 bottom plate of mend wind passage is 301 height of mend wind passageIt mends outer=70% ×
QIt mends, QIn benefit=30% × QIt mends。
In the present embodiment, when vent cabinet air draft, according to perception of the control unit to 106 position of sliding door, to adjustable plate
The control of 314 rotational angles can reach following effect：Mend air quantity 40%~69% is provided by wind-supplying mouth 302, mends air quantity
31%~50% by cabinet door opening 101 provide, remaining mend wind air quantity provided by bottom passageway 105.
Illustrate the advantageous effect of embodiment provided by the utility model below according to experimental data.According to ANSI/ASHRAE
110-2016 standards requirement " amount of leakage of laboratory hood is no more than AM0.05PPM (5e-08PPM) ".Wherein, ANSI is American National
Standard Association is formulated standard；ASHRAE is U.S. heating and ventilation project Shi Xuehui, based on standard stipulation inspection criterion.
CFD fluid scoreboard physical models and boundary condition explanation：It is placed according to ANSI/ASHRAE 110-2016 standards
SF6 search gas generators injection flow is 4L/min, and experiment parameter and result are as follows：
Experiment parameter is set as QIt mends=480CMH, QRow=1200CMH, QIt mends=QRowWhen × 40%, leakage rate for-
5.4396e-011PPM；
Experiment parameter is set as QIt mends=540CMH, QRow=1200CMH, QIt mends=QRowWhen × 45%, leakage rate 8.8284e-
011PPM；
Experiment parameter is set as QIt mends=720CMH, QRow=1200CMH, QIt mends=QRowWhen × 60%, leakage rate for-
1.7025e-010PPM；
Experiment parameter is set as QIt mends=828CMH, QRow=1200CMH, QIt mends=QRowWhen × 69%, leakage rate 1.4958e-
009PPM；
Experiment parameter is set as QIt mends=840CMH, QRow=1200CMH, QIt mends=QRowWhen × 70%, leakage rate 4.0223e-
008PPM。
As it can be seen that the vent cabinet that the utility model embodiment provides, when mending 40%~69% of air quantity for exhaust air rate, leakage
Standard requirement of the amount far below 5e-08PPM, fully meets safety requirements.But once QIt mends=QRow× 70%, leakage rate is just opened
Begin the value that is near the mark, it is meant that there are security risks.
Figure 11-1, Figure 11-2 are the vent cabinet Q that the utility model embodiment providesIt mends=40% × QRowWhen slip detection figure
Stereogram and side view；Figure 11-3 and Figure 11-4 is the vent cabinet Q that the utility model embodiment providesIt mends=40% × QRowWhen air-flow
Velocity profile figure and air velocity sectional drawing.
Figure 12-1 and Figure 12-2 is the vent cabinet Q that the utility model embodiment providesIt mends=45% × QRowWhen slip detect
Figure stereogram and side view；Figure 12-3 and Figure 12-4 is the vent cabinet Q that the utility model embodiment providesIt mends=45% × QRowWhen gas
Flow velocity degree motion pattern and air velocity sectional drawing.
Figure 13-1 and Figure 13-2 is the vent cabinet Q that the utility model embodiment providesIt mends=60% × QRowWhen slip detect
Figure stereogram and side view；Figure 13-3 and Figure 13-4 is the vent cabinet Q that the utility model embodiment providesIt mends=60% × QRowWhen gas
Flow velocity degree motion pattern and air velocity sectional drawing.
Figure 14-1 and Figure 14-2 is the vent cabinet Q that the utility model embodiment providesIt mends=69% × QRowWhen slip detect
Figure stereogram and side view；Figure 14-3 and Figure 14-4 is the vent cabinet Q that the utility model embodiment providesIt mends=69% × QRowWhen gas
Flow velocity degree motion pattern and air velocity sectional drawing.
By more than QIt mends=(40%~69%) × QRowWhen each slip detection figure stereogram and side view represent search gas
Range of the concentration volume fraction in 0.01PPM.The trace gas leak rate required in ANSI/ASHRAE110-2016 standards is not
More than 0.05PPM, the position of boundary face when that represented in figure is a concentration of 0.01PPM of search gas (SF6 sulfur hexafluorides),
As can be seen that the non-warp-wise both sides diffusion of search gas is just discharged, boundary is not overflowed in the working chamber of laboratory hood always,
Vent cabinet ability of shutting off is strong, both sides No leakage, realizes the security performance of " No leakage ".
By more than QIt mends=(40%~69%) × QRowWhen each air velocity motion pattern shown in, internal gas flow is organized as laminar flow shape
State prevents the spilling of internal contamination object well.The benefit wind of wind-supplying mouth 302 is mainly drained by deflector lower part 402, opening
It is passive outside cabinet to mend wind air quantity QDoorMainly drained by deflector top 403, the passive of bottom passageway 105 mends wind air quantity QIt is otherMainly by leading
400 rake of flowing plate, 404 gap is drained, and complies fully with safe design requirement.At this point, 400 rake 404 of deflector and water conservancy diversion
The gap exhaust air rate on plate top 403 is 10%, and the exhaust air rate on deflector top 403 is 30%, 402 exhaust air rate of deflector lower part
It is 30%~60%.
What deserves to be explained is for vent cabinet, the sliding door opening that is not only of most critical is not overflowed, in optimal shape
Under state, the air moved in cabinet can not have flow-disturbing or there are any reverse movements.
By more than QIt mends=(40%~69%) × QRowWhen each air velocity sectional drawing shown in, the outlet air jet stream of wind-supplying mouth 302
It is a fan layer flow structure, is flowed without any flow-disturbing or reverse air.Here importance is, if wind-supplying mouth, benefit wind
Amount, the arrangement of cabinet inner space and the design of deflector any one have deficiency if, the arrow in figure will appear up and down
It is perpendicularly oriented to or negative direction is directed toward.In addition to from exhaust outlet 201 is close or 100 rear wall of deflector 400 and cabinet between sky
Gas, if having in cabinet 100 arrow be up and down be perpendicularly oriented to or have arrow toward reverse direction be directed toward if, represent cabinet
Fluidic structures in 100 are chaotic, and when operation can generate vortex, adverse current and overflow risk, destroy the most basic safety of vent cabinet
Performance requirement.
Figure 15-1 and Figure 15-2 is the vent cabinet Q that the utility model embodiment providesIt mends=70% × QRowWhen slip detect
Figure stereogram and side view；Figure 15-3 and Figure 15-4 is the vent cabinet Q that the utility model embodiment providesIt mends=70% × QRowWhen gas
Flow velocity degree motion pattern and air velocity sectional drawing.
(represented by Figure 15-2 by black portions in cabinet) as it can be seen that search gas from opening 101 spill into cabinet 100 it
Outside, it is shown in vent cabinet and is arranged to the security performance requirement that can not meet vent cabinet when Q mends=70% × Q rows.
From Figure 15-1 as can be seen that the boundary face of the search gas of a concentration of 0.01PPM extends to left and right side in vent cabinet
Near.At this time via opening 101 enter cabinets 100 in passive supplemental air flow flow velocity it is relatively low, and due in cabinet left and right side from row
Farther out, search gas is difficult to be added air-flow and is pushed into exhaust outlet 201 in air port 201, therefore pollutant exists and overflows outside opening 101
Risk.
Although in various embodiments of the utility model, wind-supplying mouth 302 is separated into outside 311 He of wind-supplying mouth by guide plate 310
Inside wind-supplying mouth 312, it will be appreciated by a person skilled in the art that wind-supplying mouth 302 can also be separated by multiple guide plates 310 it is more
A outside wind-supplying mouth 311 and multiple inside wind-supplying mouths 312, therefore the utility model mends wind to the quantity of guide plate 310 and inside
The quantity of mouth 312 and outside wind-supplying mouth 311 is not construed as limiting.
The vent cabinet that various embodiments of the utility model provides, benefit must all be passed through to vent cabinet by having broken in original industry
The understanding that can just prevent that pernicious gas overflows inside vent cabinet must be isolated in the inner cavity of vent cabinet by wind with external environment.Than
Such as, it is happy to put forth energy etc.《The research application of aircurtain exhaust hood》(University Of Nanhua's journal (science and engineering version):In March, 2002, volume 16
1 phase:It 44-49) one the article pointed out, " compensating ventilation cabinet laboratory hood then because of the easy interference surface wind speed of compensation wind 1) provided, destroys air draft
The sealing effect of cabinet ", it is clear that author thinks that compensating ventilation cabinet laboratory hood has " sealing effect for being easily destroyed laboratory hood ", causes to arrange
The problem of gas overflowing in wind cabinet.
The vent cabinet that various embodiments of the utility model provides, is not confined in original understanding to vent cabinet, is created
Property wind mended to the external environment of vent cabinet guide, original is made to be considered as the external air flow that interference is closed, is changed into conduct
Passive benefit general mood stream is same actively to mend " beneficial " air-flow that general mood stream works and cooperates together.
According to the vent cabinet that the utility model embodiment provides, all air draft air-flows being discharged to other than vent cabinet are eliminated
All by the active supplemental air flow of air-makeup system or all by cabinet outside the security risk supplemented of passive supplemental air flow, pass through
Wind-supplying mouth 302 only is set below the opening of cabinet 100 101, and controls exhaust air rate, actively mend wind air quantity and passively mends wind air quantity phase
Ratio between mutually makes to be formed always towards the one-way gas flow of exhaust outlet in cabinet at the opening 101 of vent cabinet, thereby may be ensured that
The safety of user effectively prevent pernicious gas in cabinet to overflow.In addition, it is needed relative to when setting three wind-supplying mouths in the prior art
The air output of three wind-supplying mouths is accurately controlled, once otherwise disequilibrium, effect and safety are with regard to lossy risk, this reality
With novel due to only setting a wind-supplying mouth, more simple in structure relative to multiple wind-supplying mouths, production cost is lower, more increases
Safety coefficient is added.
Claims (22)
1. a kind of vent cabinet is provided with the cabinet of opening including front side, which is characterized in that further include：
The exhaust outlet in cabinet is connected, the exhaust outlet, which is set at the top of cabinet, leans on rear side；
Mend wind passage including wind-supplying mouth；And
It stands in cabinet and leans on the deflector of rear side, the deflector includes substrate and rake, the substrate lower end and the cabinet
Between body bottom, between the rake lower end and the substrate there are gap,
Wherein, the wind-supplying mouth is located at below the opening, and the rake is set as its front end and institute is covered when seeing from below
State exhaust outlet.
2. a kind of vent cabinet as described in claim 1, which is characterized in that in terms of front side, the center of the exhaust outlet is located at institute
State the centre of the left and right sides in cabinet；Side is seen from the left or right, and the center of the exhaust outlet is located in the cabinet by rear side.
3. a kind of vent cabinet as described in claim 1, which is characterized in that side is seen from the left or right, the centre bit of the exhaust outlet
At between side front and rear in the cabinet and away from rear side a quarter.
4. a kind of vent cabinet as described in claim 1, which is characterized in that in terms of front side, the width of the wind-supplying mouth be more than or
Equal to the width of the cabinet, the wind-supplying mouth is made to extend to opening left and right ends and covers the opening.
5. a kind of vent cabinet as described in claim 1, which is characterized in that side is seen from the left or right, the top side of the wind-supplying mouth and
Arc-shaped connection or chamfering connection, make the wind-supplying mouth upwardly and rearwardly blow between rear side.
6. a kind of vent cabinet as claimed in claim 5, which is characterized in that the arc is quadrant arc.
7. a kind of vent cabinet as described in claim 1, which is characterized in that the wind-supplying mouth outside and the cabinet front inner
In same perpendicular, make to cover the opening of the cabinet through the upward benefit general mood stream that the wind-supplying mouth is sent out.
8. a kind of vent cabinet as described in claim 1, which is characterized in that guide plate, the guiding are equipped in the wind-supplying mouth
The wind-supplying mouth is separated into the outside wind-supplying mouth pointed up and the inside wind-supplying mouth being directed toward in the cabinet by plate.
9. a kind of vent cabinet as claimed in claim 8, which is characterized in that the cross section of the guide plate is arc-shaped, for leading
The benefit wind airflow direction that inside wind-supplying mouth described in tying-in is sent out.
10. a kind of vent cabinet as claimed in claim 8, which is characterized in that the guide plate lower end is located at the benefit wind and leads to
In road, the lower end is used for distributing the benefit wind air quantity of the outside wind-supplying mouth and the inside wind-supplying mouth.
11. a kind of vent cabinet as described in claim 1, which is characterized in that the deflector substrate is equipped with through hole, described
Through hole is uniformly distributed along horizontal width direction, its hole area is gradually reduced relative to the accounting of unit area from down to up.
12. a kind of vent cabinet as claimed in claim 11, which is characterized in that the through hole from down to up its each other between
Away from being gradually increased or, the hole area of the through hole is gradually reduced.
13. a kind of vent cabinet as claimed in claim 11, which is characterized in that in terms of front side, be set to the deflector substrate
The through hole it is up-narrow and down-wide, radial arrangement.
14. a kind of vent cabinet as claimed in claim 11, which is characterized in that the deflector substrate further includes deflector top
With deflector lower part, there are gaps between the deflector lower part and the deflector top.
15. a kind of vent cabinet as described in claim 1, which is characterized in that front side top is equipped with hang plate in the cabinet；Institute
The upward extending direction of the hang plate extending direction shape upward with the rake is stated to have angle.
16. a kind of vent cabinet as described in claim 1, which is characterized in that further include the benefit wind connected with the mend wind passage
Wind turbine, the benefit wind wind turbine is adjustable power type wind turbine.
17. a kind of vent cabinet as claimed in claim 16, which is characterized in that the benefit wind wind turbine is set on the mend wind passage
It is interior.
18. a kind of vent cabinet as described in claim 1, which is characterized in that the benefit air valve connected with mend wind passage is further included,
The benefit air valve is aperture type variable valve.
19. a kind of vent cabinet as described in claim 1, which is characterized in that the vent cabinet side wall and/or lower wall are hollow knot
Structure, the mend wind passage are set on the side wall and/or lower wall of the cabinet.
20. a kind of vent cabinet as claimed in claim 8, which is characterized in that further include：
The sliding door of the opening is located at, the sliding door can be slided along the opening, for adjusting the open area of the opening；
And bottom passageway, the bottom passageway is by, with being connected outside the cabinet, the bottom passageway outlet is located at institute in the cabinet
It states in cabinet,
Wherein, the vent cabinet is set as when exhaust outlet air draft, and the 40%~69% of exhaust air rate is sent out by the wind-supplying mouth
Air-flow supplements.
21. a kind of vent cabinet as claimed in claim 20, which is characterized in that the wind-supplying mouth lateral wall and sliding door outside
Wall is located in same perpendicular, makes to cover through the upward benefit general mood stream that the wind-supplying mouth is sent out and be opened described in the cabinet
Mouthful.
22. a kind of vent cabinet as claimed in claim 20, which is characterized in that further include：
Position sensor, for detecting the position of the sliding door；And
The control unit being connect with the position sensor,
Wherein, the guide plate further includes adjustable plate, and the adjustable plate is hinged with the guide plate, and described control unit is according to institute
The detection information for stating position sensor controls the adjustable plate to rotate an angle, for adjust by guide plate separate it is described in
The allocation of the amount of air of side wind-supplying mouth and the outside wind-supplying mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721303330.3U CN207463783U (en) | 2017-10-11 | 2017-10-11 | Vent cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721303330.3U CN207463783U (en) | 2017-10-11 | 2017-10-11 | Vent cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207463783U true CN207463783U (en) | 2018-06-08 |
Family
ID=62266655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721303330.3U Active CN207463783U (en) | 2017-10-11 | 2017-10-11 | Vent cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207463783U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107497815A (en) * | 2017-10-11 | 2017-12-22 | 倚世节能科技（上海）有限公司 | Vent cabinet |
| CN112453001A (en) * | 2020-10-27 | 2021-03-09 | 苏州薪火云智能科技有限公司 | Energy-conserving stationary flow fume chamber |
-
2017
- 2017-10-11 CN CN201721303330.3U patent/CN207463783U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107497815A (en) * | 2017-10-11 | 2017-12-22 | 倚世节能科技（上海）有限公司 | Vent cabinet |
| CN107497815B (en) * | 2017-10-11 | 2020-08-07 | 倚世节能科技（上海）有限公司 | Ventilation cabinet |
| CN112453001A (en) * | 2020-10-27 | 2021-03-09 | 苏州薪火云智能科技有限公司 | Energy-conserving stationary flow fume chamber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107497815A (en) | Vent cabinet | |
| WO2016161834A1 (en) | Ventilating cabinet | |
| US7217183B2 (en) | Turbulence-free laboratory safety enclosure | |
| CN106140769B (en) | Ventilation cabinet | |
| CN205536442U (en) | Ventilation equipment of stationary flow structure and applied this stationary flow structure | |
| CN207463783U (en) | Vent cabinet | |
| CN105674360A (en) | Range hood | |
| CN217941291U (en) | Upper air supplementing module and ventilation cabinet | |
| CN111482205A (en) | Multifunctional biological safety cabinet | |
| CN201505655U (en) | Device capable of preventing pernicious gas from leaking | |
| JP6278532B2 (en) | Weighing system | |
| CN111112271A (en) | Adjustable speed-increasing and flow-stabilizing type physical and chemical safety cabinet | |
| CN207196802U (en) | A kind of ventilation equipment | |
| CN206689173U (en) | A kind of intelligent vent cabinet | |
| CN207823549U (en) | Laboratory hood | |
| CN217857912U (en) | Ventilation cabinet | |
| CN217726586U (en) | Flow guide structure and fume chamber | |
| JP2001033072A (en) | Ventilation system | |
| CN205128574U (en) | Deflector of ventilation hood | |
| CN101131395B (en) | Biological safety experiment cabinet | |
| JP4704284B2 (en) | Air curtain type air tank | |
| JP2016185584A (en) | Isolator | |
| CN208458191U (en) | A kind of ventilating system of laboratory operation platform | |
| JP2015166645A (en) | Method for reducing indoor circulating filtered air blowing amount by using partial exhaust gas circulating utilization type safety cabinet and clean room reducing indoor circulation air blowing amount keeping cleanliness by using partial exhaust gas circulating utilization type safety cabinet | |
| CN215980114U (en) | Multi-wind-path air supply structure and biological safety cabinet thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |